1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * net/core/devlink.c - Network physical/parent device Netlink interface
4 *
5 * Heavily inspired by net/wireless/
6 * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
7 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/types.h>
13 #include <linux/slab.h>
14 #include <linux/gfp.h>
15 #include <linux/device.h>
16 #include <linux/list.h>
17 #include <linux/netdevice.h>
18 #include <linux/spinlock.h>
19 #include <linux/refcount.h>
20 #include <linux/workqueue.h>
21 #include <linux/u64_stats_sync.h>
22 #include <linux/timekeeping.h>
23 #include <rdma/ib_verbs.h>
24 #include <net/netlink.h>
25 #include <net/genetlink.h>
26 #include <net/rtnetlink.h>
27 #include <net/net_namespace.h>
28 #include <net/sock.h>
29 #include <net/devlink.h>
30 #define CREATE_TRACE_POINTS
31 #include <trace/events/devlink.h>
32
33 static struct devlink_dpipe_field devlink_dpipe_fields_ethernet[] = {
34 {
35 .name = "destination mac",
36 .id = DEVLINK_DPIPE_FIELD_ETHERNET_DST_MAC,
37 .bitwidth = 48,
38 },
39 };
40
41 struct devlink_dpipe_header devlink_dpipe_header_ethernet = {
42 .name = "ethernet",
43 .id = DEVLINK_DPIPE_HEADER_ETHERNET,
44 .fields = devlink_dpipe_fields_ethernet,
45 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet),
46 .global = true,
47 };
48 EXPORT_SYMBOL(devlink_dpipe_header_ethernet);
49
50 static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = {
51 {
52 .name = "destination ip",
53 .id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP,
54 .bitwidth = 32,
55 },
56 };
57
58 struct devlink_dpipe_header devlink_dpipe_header_ipv4 = {
59 .name = "ipv4",
60 .id = DEVLINK_DPIPE_HEADER_IPV4,
61 .fields = devlink_dpipe_fields_ipv4,
62 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4),
63 .global = true,
64 };
65 EXPORT_SYMBOL(devlink_dpipe_header_ipv4);
66
67 static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = {
68 {
69 .name = "destination ip",
70 .id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP,
71 .bitwidth = 128,
72 },
73 };
74
75 struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
76 .name = "ipv6",
77 .id = DEVLINK_DPIPE_HEADER_IPV6,
78 .fields = devlink_dpipe_fields_ipv6,
79 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6),
80 .global = true,
81 };
82 EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
83
84 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
85 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
86 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_trap_report);
87
88 static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = {
89 [DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY },
90 };
91
92 static LIST_HEAD(devlink_list);
93
94 /* devlink_mutex
95 *
96 * An overall lock guarding every operation coming from userspace.
97 * It also guards devlink devices list and it is taken when
98 * driver registers/unregisters it.
99 */
100 static DEFINE_MUTEX(devlink_mutex);
101
devlink_net(const struct devlink * devlink)102 struct net *devlink_net(const struct devlink *devlink)
103 {
104 return read_pnet(&devlink->_net);
105 }
106 EXPORT_SYMBOL_GPL(devlink_net);
107
__devlink_net_set(struct devlink * devlink,struct net * net)108 static void __devlink_net_set(struct devlink *devlink, struct net *net)
109 {
110 write_pnet(&devlink->_net, net);
111 }
112
devlink_net_set(struct devlink * devlink,struct net * net)113 void devlink_net_set(struct devlink *devlink, struct net *net)
114 {
115 if (WARN_ON(devlink->registered))
116 return;
117 __devlink_net_set(devlink, net);
118 }
119 EXPORT_SYMBOL_GPL(devlink_net_set);
120
devlink_get_from_attrs(struct net * net,struct nlattr ** attrs)121 static struct devlink *devlink_get_from_attrs(struct net *net,
122 struct nlattr **attrs)
123 {
124 struct devlink *devlink;
125 char *busname;
126 char *devname;
127
128 if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
129 return ERR_PTR(-EINVAL);
130
131 busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
132 devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
133
134 lockdep_assert_held(&devlink_mutex);
135
136 list_for_each_entry(devlink, &devlink_list, list) {
137 if (strcmp(devlink->dev->bus->name, busname) == 0 &&
138 strcmp(dev_name(devlink->dev), devname) == 0 &&
139 net_eq(devlink_net(devlink), net))
140 return devlink;
141 }
142
143 return ERR_PTR(-ENODEV);
144 }
145
devlink_get_from_info(struct genl_info * info)146 static struct devlink *devlink_get_from_info(struct genl_info *info)
147 {
148 return devlink_get_from_attrs(genl_info_net(info), info->attrs);
149 }
150
devlink_port_get_by_index(struct devlink * devlink,unsigned int port_index)151 static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
152 unsigned int port_index)
153 {
154 struct devlink_port *devlink_port;
155
156 list_for_each_entry(devlink_port, &devlink->port_list, list) {
157 if (devlink_port->index == port_index)
158 return devlink_port;
159 }
160 return NULL;
161 }
162
devlink_port_index_exists(struct devlink * devlink,unsigned int port_index)163 static bool devlink_port_index_exists(struct devlink *devlink,
164 unsigned int port_index)
165 {
166 return devlink_port_get_by_index(devlink, port_index);
167 }
168
devlink_port_get_from_attrs(struct devlink * devlink,struct nlattr ** attrs)169 static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
170 struct nlattr **attrs)
171 {
172 if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
173 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
174 struct devlink_port *devlink_port;
175
176 devlink_port = devlink_port_get_by_index(devlink, port_index);
177 if (!devlink_port)
178 return ERR_PTR(-ENODEV);
179 return devlink_port;
180 }
181 return ERR_PTR(-EINVAL);
182 }
183
devlink_port_get_from_info(struct devlink * devlink,struct genl_info * info)184 static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
185 struct genl_info *info)
186 {
187 return devlink_port_get_from_attrs(devlink, info->attrs);
188 }
189
190 struct devlink_sb {
191 struct list_head list;
192 unsigned int index;
193 u32 size;
194 u16 ingress_pools_count;
195 u16 egress_pools_count;
196 u16 ingress_tc_count;
197 u16 egress_tc_count;
198 };
199
devlink_sb_pool_count(struct devlink_sb * devlink_sb)200 static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
201 {
202 return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
203 }
204
devlink_sb_get_by_index(struct devlink * devlink,unsigned int sb_index)205 static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
206 unsigned int sb_index)
207 {
208 struct devlink_sb *devlink_sb;
209
210 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
211 if (devlink_sb->index == sb_index)
212 return devlink_sb;
213 }
214 return NULL;
215 }
216
devlink_sb_index_exists(struct devlink * devlink,unsigned int sb_index)217 static bool devlink_sb_index_exists(struct devlink *devlink,
218 unsigned int sb_index)
219 {
220 return devlink_sb_get_by_index(devlink, sb_index);
221 }
222
devlink_sb_get_from_attrs(struct devlink * devlink,struct nlattr ** attrs)223 static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
224 struct nlattr **attrs)
225 {
226 if (attrs[DEVLINK_ATTR_SB_INDEX]) {
227 u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
228 struct devlink_sb *devlink_sb;
229
230 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
231 if (!devlink_sb)
232 return ERR_PTR(-ENODEV);
233 return devlink_sb;
234 }
235 return ERR_PTR(-EINVAL);
236 }
237
devlink_sb_get_from_info(struct devlink * devlink,struct genl_info * info)238 static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
239 struct genl_info *info)
240 {
241 return devlink_sb_get_from_attrs(devlink, info->attrs);
242 }
243
devlink_sb_pool_index_get_from_attrs(struct devlink_sb * devlink_sb,struct nlattr ** attrs,u16 * p_pool_index)244 static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
245 struct nlattr **attrs,
246 u16 *p_pool_index)
247 {
248 u16 val;
249
250 if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
251 return -EINVAL;
252
253 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
254 if (val >= devlink_sb_pool_count(devlink_sb))
255 return -EINVAL;
256 *p_pool_index = val;
257 return 0;
258 }
259
devlink_sb_pool_index_get_from_info(struct devlink_sb * devlink_sb,struct genl_info * info,u16 * p_pool_index)260 static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
261 struct genl_info *info,
262 u16 *p_pool_index)
263 {
264 return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
265 p_pool_index);
266 }
267
268 static int
devlink_sb_pool_type_get_from_attrs(struct nlattr ** attrs,enum devlink_sb_pool_type * p_pool_type)269 devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
270 enum devlink_sb_pool_type *p_pool_type)
271 {
272 u8 val;
273
274 if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
275 return -EINVAL;
276
277 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
278 if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
279 val != DEVLINK_SB_POOL_TYPE_EGRESS)
280 return -EINVAL;
281 *p_pool_type = val;
282 return 0;
283 }
284
285 static int
devlink_sb_pool_type_get_from_info(struct genl_info * info,enum devlink_sb_pool_type * p_pool_type)286 devlink_sb_pool_type_get_from_info(struct genl_info *info,
287 enum devlink_sb_pool_type *p_pool_type)
288 {
289 return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
290 }
291
292 static int
devlink_sb_th_type_get_from_attrs(struct nlattr ** attrs,enum devlink_sb_threshold_type * p_th_type)293 devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
294 enum devlink_sb_threshold_type *p_th_type)
295 {
296 u8 val;
297
298 if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
299 return -EINVAL;
300
301 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
302 if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
303 val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
304 return -EINVAL;
305 *p_th_type = val;
306 return 0;
307 }
308
309 static int
devlink_sb_th_type_get_from_info(struct genl_info * info,enum devlink_sb_threshold_type * p_th_type)310 devlink_sb_th_type_get_from_info(struct genl_info *info,
311 enum devlink_sb_threshold_type *p_th_type)
312 {
313 return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
314 }
315
316 static int
devlink_sb_tc_index_get_from_attrs(struct devlink_sb * devlink_sb,struct nlattr ** attrs,enum devlink_sb_pool_type pool_type,u16 * p_tc_index)317 devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
318 struct nlattr **attrs,
319 enum devlink_sb_pool_type pool_type,
320 u16 *p_tc_index)
321 {
322 u16 val;
323
324 if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
325 return -EINVAL;
326
327 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
328 if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
329 val >= devlink_sb->ingress_tc_count)
330 return -EINVAL;
331 if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
332 val >= devlink_sb->egress_tc_count)
333 return -EINVAL;
334 *p_tc_index = val;
335 return 0;
336 }
337
338 static int
devlink_sb_tc_index_get_from_info(struct devlink_sb * devlink_sb,struct genl_info * info,enum devlink_sb_pool_type pool_type,u16 * p_tc_index)339 devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
340 struct genl_info *info,
341 enum devlink_sb_pool_type pool_type,
342 u16 *p_tc_index)
343 {
344 return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
345 pool_type, p_tc_index);
346 }
347
348 struct devlink_region {
349 struct devlink *devlink;
350 struct devlink_port *port;
351 struct list_head list;
352 union {
353 const struct devlink_region_ops *ops;
354 const struct devlink_port_region_ops *port_ops;
355 };
356 struct list_head snapshot_list;
357 u32 max_snapshots;
358 u32 cur_snapshots;
359 u64 size;
360 };
361
362 struct devlink_snapshot {
363 struct list_head list;
364 struct devlink_region *region;
365 u8 *data;
366 u32 id;
367 };
368
369 static struct devlink_region *
devlink_region_get_by_name(struct devlink * devlink,const char * region_name)370 devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
371 {
372 struct devlink_region *region;
373
374 list_for_each_entry(region, &devlink->region_list, list)
375 if (!strcmp(region->ops->name, region_name))
376 return region;
377
378 return NULL;
379 }
380
381 static struct devlink_region *
devlink_port_region_get_by_name(struct devlink_port * port,const char * region_name)382 devlink_port_region_get_by_name(struct devlink_port *port,
383 const char *region_name)
384 {
385 struct devlink_region *region;
386
387 list_for_each_entry(region, &port->region_list, list)
388 if (!strcmp(region->ops->name, region_name))
389 return region;
390
391 return NULL;
392 }
393
394 static struct devlink_snapshot *
devlink_region_snapshot_get_by_id(struct devlink_region * region,u32 id)395 devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
396 {
397 struct devlink_snapshot *snapshot;
398
399 list_for_each_entry(snapshot, ®ion->snapshot_list, list)
400 if (snapshot->id == id)
401 return snapshot;
402
403 return NULL;
404 }
405
406 #define DEVLINK_NL_FLAG_NEED_PORT BIT(0)
407 #define DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT BIT(1)
408
409 /* The per devlink instance lock is taken by default in the pre-doit
410 * operation, yet several commands do not require this. The global
411 * devlink lock is taken and protects from disruption by user-calls.
412 */
413 #define DEVLINK_NL_FLAG_NO_LOCK BIT(2)
414
devlink_nl_pre_doit(const struct genl_ops * ops,struct sk_buff * skb,struct genl_info * info)415 static int devlink_nl_pre_doit(const struct genl_ops *ops,
416 struct sk_buff *skb, struct genl_info *info)
417 {
418 struct devlink_port *devlink_port;
419 struct devlink *devlink;
420 int err;
421
422 mutex_lock(&devlink_mutex);
423 devlink = devlink_get_from_info(info);
424 if (IS_ERR(devlink)) {
425 mutex_unlock(&devlink_mutex);
426 return PTR_ERR(devlink);
427 }
428 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
429 mutex_lock(&devlink->lock);
430 info->user_ptr[0] = devlink;
431 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
432 devlink_port = devlink_port_get_from_info(devlink, info);
433 if (IS_ERR(devlink_port)) {
434 err = PTR_ERR(devlink_port);
435 goto unlock;
436 }
437 info->user_ptr[1] = devlink_port;
438 } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT) {
439 devlink_port = devlink_port_get_from_info(devlink, info);
440 if (!IS_ERR(devlink_port))
441 info->user_ptr[1] = devlink_port;
442 }
443 return 0;
444
445 unlock:
446 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
447 mutex_unlock(&devlink->lock);
448 mutex_unlock(&devlink_mutex);
449 return err;
450 }
451
devlink_nl_post_doit(const struct genl_ops * ops,struct sk_buff * skb,struct genl_info * info)452 static void devlink_nl_post_doit(const struct genl_ops *ops,
453 struct sk_buff *skb, struct genl_info *info)
454 {
455 struct devlink *devlink;
456
457 devlink = info->user_ptr[0];
458 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
459 mutex_unlock(&devlink->lock);
460 mutex_unlock(&devlink_mutex);
461 }
462
463 static struct genl_family devlink_nl_family;
464
465 enum devlink_multicast_groups {
466 DEVLINK_MCGRP_CONFIG,
467 };
468
469 static const struct genl_multicast_group devlink_nl_mcgrps[] = {
470 [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
471 };
472
devlink_nl_put_handle(struct sk_buff * msg,struct devlink * devlink)473 static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
474 {
475 if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
476 return -EMSGSIZE;
477 if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
478 return -EMSGSIZE;
479 return 0;
480 }
481
482 struct devlink_reload_combination {
483 enum devlink_reload_action action;
484 enum devlink_reload_limit limit;
485 };
486
487 static const struct devlink_reload_combination devlink_reload_invalid_combinations[] = {
488 {
489 /* can't reinitialize driver with no down time */
490 .action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
491 .limit = DEVLINK_RELOAD_LIMIT_NO_RESET,
492 },
493 };
494
495 static bool
devlink_reload_combination_is_invalid(enum devlink_reload_action action,enum devlink_reload_limit limit)496 devlink_reload_combination_is_invalid(enum devlink_reload_action action,
497 enum devlink_reload_limit limit)
498 {
499 int i;
500
501 for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++)
502 if (devlink_reload_invalid_combinations[i].action == action &&
503 devlink_reload_invalid_combinations[i].limit == limit)
504 return true;
505 return false;
506 }
507
508 static bool
devlink_reload_action_is_supported(struct devlink * devlink,enum devlink_reload_action action)509 devlink_reload_action_is_supported(struct devlink *devlink, enum devlink_reload_action action)
510 {
511 return test_bit(action, &devlink->ops->reload_actions);
512 }
513
514 static bool
devlink_reload_limit_is_supported(struct devlink * devlink,enum devlink_reload_limit limit)515 devlink_reload_limit_is_supported(struct devlink *devlink, enum devlink_reload_limit limit)
516 {
517 return test_bit(limit, &devlink->ops->reload_limits);
518 }
519
devlink_reload_stat_put(struct sk_buff * msg,enum devlink_reload_limit limit,u32 value)520 static int devlink_reload_stat_put(struct sk_buff *msg,
521 enum devlink_reload_limit limit, u32 value)
522 {
523 struct nlattr *reload_stats_entry;
524
525 reload_stats_entry = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS_ENTRY);
526 if (!reload_stats_entry)
527 return -EMSGSIZE;
528
529 if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_STATS_LIMIT, limit) ||
530 nla_put_u32(msg, DEVLINK_ATTR_RELOAD_STATS_VALUE, value))
531 goto nla_put_failure;
532 nla_nest_end(msg, reload_stats_entry);
533 return 0;
534
535 nla_put_failure:
536 nla_nest_cancel(msg, reload_stats_entry);
537 return -EMSGSIZE;
538 }
539
devlink_reload_stats_put(struct sk_buff * msg,struct devlink * devlink,bool is_remote)540 static int devlink_reload_stats_put(struct sk_buff *msg, struct devlink *devlink, bool is_remote)
541 {
542 struct nlattr *reload_stats_attr, *act_info, *act_stats;
543 int i, j, stat_idx;
544 u32 value;
545
546 if (!is_remote)
547 reload_stats_attr = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS);
548 else
549 reload_stats_attr = nla_nest_start(msg, DEVLINK_ATTR_REMOTE_RELOAD_STATS);
550
551 if (!reload_stats_attr)
552 return -EMSGSIZE;
553
554 for (i = 0; i <= DEVLINK_RELOAD_ACTION_MAX; i++) {
555 if ((!is_remote &&
556 !devlink_reload_action_is_supported(devlink, i)) ||
557 i == DEVLINK_RELOAD_ACTION_UNSPEC)
558 continue;
559 act_info = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_ACTION_INFO);
560 if (!act_info)
561 goto nla_put_failure;
562
563 if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_ACTION, i))
564 goto action_info_nest_cancel;
565 act_stats = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_ACTION_STATS);
566 if (!act_stats)
567 goto action_info_nest_cancel;
568
569 for (j = 0; j <= DEVLINK_RELOAD_LIMIT_MAX; j++) {
570 /* Remote stats are shown even if not locally supported.
571 * Stats of actions with unspecified limit are shown
572 * though drivers don't need to register unspecified
573 * limit.
574 */
575 if ((!is_remote && j != DEVLINK_RELOAD_LIMIT_UNSPEC &&
576 !devlink_reload_limit_is_supported(devlink, j)) ||
577 devlink_reload_combination_is_invalid(i, j))
578 continue;
579
580 stat_idx = j * __DEVLINK_RELOAD_ACTION_MAX + i;
581 if (!is_remote)
582 value = devlink->stats.reload_stats[stat_idx];
583 else
584 value = devlink->stats.remote_reload_stats[stat_idx];
585 if (devlink_reload_stat_put(msg, j, value))
586 goto action_stats_nest_cancel;
587 }
588 nla_nest_end(msg, act_stats);
589 nla_nest_end(msg, act_info);
590 }
591 nla_nest_end(msg, reload_stats_attr);
592 return 0;
593
594 action_stats_nest_cancel:
595 nla_nest_cancel(msg, act_stats);
596 action_info_nest_cancel:
597 nla_nest_cancel(msg, act_info);
598 nla_put_failure:
599 nla_nest_cancel(msg, reload_stats_attr);
600 return -EMSGSIZE;
601 }
602
devlink_nl_fill(struct sk_buff * msg,struct devlink * devlink,enum devlink_command cmd,u32 portid,u32 seq,int flags)603 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
604 enum devlink_command cmd, u32 portid,
605 u32 seq, int flags)
606 {
607 struct nlattr *dev_stats;
608 void *hdr;
609
610 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
611 if (!hdr)
612 return -EMSGSIZE;
613
614 if (devlink_nl_put_handle(msg, devlink))
615 goto nla_put_failure;
616 if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_FAILED, devlink->reload_failed))
617 goto nla_put_failure;
618
619 dev_stats = nla_nest_start(msg, DEVLINK_ATTR_DEV_STATS);
620 if (!dev_stats)
621 goto nla_put_failure;
622
623 if (devlink_reload_stats_put(msg, devlink, false))
624 goto dev_stats_nest_cancel;
625 if (devlink_reload_stats_put(msg, devlink, true))
626 goto dev_stats_nest_cancel;
627
628 nla_nest_end(msg, dev_stats);
629 genlmsg_end(msg, hdr);
630 return 0;
631
632 dev_stats_nest_cancel:
633 nla_nest_cancel(msg, dev_stats);
634 nla_put_failure:
635 genlmsg_cancel(msg, hdr);
636 return -EMSGSIZE;
637 }
638
devlink_notify(struct devlink * devlink,enum devlink_command cmd)639 static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
640 {
641 struct sk_buff *msg;
642 int err;
643
644 WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
645
646 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
647 if (!msg)
648 return;
649
650 err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
651 if (err) {
652 nlmsg_free(msg);
653 return;
654 }
655
656 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
657 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
658 }
659
devlink_nl_port_attrs_put(struct sk_buff * msg,struct devlink_port * devlink_port)660 static int devlink_nl_port_attrs_put(struct sk_buff *msg,
661 struct devlink_port *devlink_port)
662 {
663 struct devlink_port_attrs *attrs = &devlink_port->attrs;
664
665 if (!devlink_port->attrs_set)
666 return 0;
667 if (attrs->lanes) {
668 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes))
669 return -EMSGSIZE;
670 }
671 if (nla_put_u8(msg, DEVLINK_ATTR_PORT_SPLITTABLE, attrs->splittable))
672 return -EMSGSIZE;
673 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
674 return -EMSGSIZE;
675 switch (devlink_port->attrs.flavour) {
676 case DEVLINK_PORT_FLAVOUR_PCI_PF:
677 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
678 attrs->pci_pf.controller) ||
679 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_pf.pf))
680 return -EMSGSIZE;
681 if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external))
682 return -EMSGSIZE;
683 break;
684 case DEVLINK_PORT_FLAVOUR_PCI_VF:
685 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
686 attrs->pci_vf.controller) ||
687 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_vf.pf) ||
688 nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER, attrs->pci_vf.vf))
689 return -EMSGSIZE;
690 if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external))
691 return -EMSGSIZE;
692 break;
693 case DEVLINK_PORT_FLAVOUR_PHYSICAL:
694 case DEVLINK_PORT_FLAVOUR_CPU:
695 case DEVLINK_PORT_FLAVOUR_DSA:
696 case DEVLINK_PORT_FLAVOUR_VIRTUAL:
697 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER,
698 attrs->phys.port_number))
699 return -EMSGSIZE;
700 if (!attrs->split)
701 return 0;
702 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
703 attrs->phys.port_number))
704 return -EMSGSIZE;
705 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
706 attrs->phys.split_subport_number))
707 return -EMSGSIZE;
708 break;
709 default:
710 break;
711 }
712 return 0;
713 }
714
715 static int
devlink_nl_port_function_attrs_put(struct sk_buff * msg,struct devlink_port * port,struct netlink_ext_ack * extack)716 devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port,
717 struct netlink_ext_ack *extack)
718 {
719 struct devlink *devlink = port->devlink;
720 const struct devlink_ops *ops;
721 struct nlattr *function_attr;
722 bool empty_nest = true;
723 int err = 0;
724
725 function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION);
726 if (!function_attr)
727 return -EMSGSIZE;
728
729 ops = devlink->ops;
730 if (ops->port_function_hw_addr_get) {
731 int hw_addr_len;
732 u8 hw_addr[MAX_ADDR_LEN];
733
734 err = ops->port_function_hw_addr_get(devlink, port, hw_addr, &hw_addr_len, extack);
735 if (err == -EOPNOTSUPP) {
736 /* Port function attributes are optional for a port. If port doesn't
737 * support function attribute, returning -EOPNOTSUPP is not an error.
738 */
739 err = 0;
740 goto out;
741 } else if (err) {
742 goto out;
743 }
744 err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr);
745 if (err)
746 goto out;
747 empty_nest = false;
748 }
749
750 out:
751 if (err || empty_nest)
752 nla_nest_cancel(msg, function_attr);
753 else
754 nla_nest_end(msg, function_attr);
755 return err;
756 }
757
devlink_nl_port_fill(struct sk_buff * msg,struct devlink * devlink,struct devlink_port * devlink_port,enum devlink_command cmd,u32 portid,u32 seq,int flags,struct netlink_ext_ack * extack)758 static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
759 struct devlink_port *devlink_port,
760 enum devlink_command cmd, u32 portid,
761 u32 seq, int flags,
762 struct netlink_ext_ack *extack)
763 {
764 void *hdr;
765
766 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
767 if (!hdr)
768 return -EMSGSIZE;
769
770 if (devlink_nl_put_handle(msg, devlink))
771 goto nla_put_failure;
772 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
773 goto nla_put_failure;
774
775 /* Hold rtnl lock while accessing port's netdev attributes. */
776 rtnl_lock();
777 spin_lock_bh(&devlink_port->type_lock);
778 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
779 goto nla_put_failure_type_locked;
780 if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
781 nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
782 devlink_port->desired_type))
783 goto nla_put_failure_type_locked;
784 if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
785 struct net *net = devlink_net(devlink_port->devlink);
786 struct net_device *netdev = devlink_port->type_dev;
787
788 if (netdev && net_eq(net, dev_net(netdev)) &&
789 (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
790 netdev->ifindex) ||
791 nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
792 netdev->name)))
793 goto nla_put_failure_type_locked;
794 }
795 if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
796 struct ib_device *ibdev = devlink_port->type_dev;
797
798 if (ibdev &&
799 nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
800 ibdev->name))
801 goto nla_put_failure_type_locked;
802 }
803 spin_unlock_bh(&devlink_port->type_lock);
804 rtnl_unlock();
805 if (devlink_nl_port_attrs_put(msg, devlink_port))
806 goto nla_put_failure;
807 if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack))
808 goto nla_put_failure;
809
810 genlmsg_end(msg, hdr);
811 return 0;
812
813 nla_put_failure_type_locked:
814 spin_unlock_bh(&devlink_port->type_lock);
815 rtnl_unlock();
816 nla_put_failure:
817 genlmsg_cancel(msg, hdr);
818 return -EMSGSIZE;
819 }
820
devlink_port_notify(struct devlink_port * devlink_port,enum devlink_command cmd)821 static void devlink_port_notify(struct devlink_port *devlink_port,
822 enum devlink_command cmd)
823 {
824 struct devlink *devlink = devlink_port->devlink;
825 struct sk_buff *msg;
826 int err;
827
828 if (!devlink_port->registered)
829 return;
830
831 WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
832
833 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
834 if (!msg)
835 return;
836
837 err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0,
838 NULL);
839 if (err) {
840 nlmsg_free(msg);
841 return;
842 }
843
844 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
845 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
846 }
847
devlink_nl_cmd_get_doit(struct sk_buff * skb,struct genl_info * info)848 static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
849 {
850 struct devlink *devlink = info->user_ptr[0];
851 struct sk_buff *msg;
852 int err;
853
854 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
855 if (!msg)
856 return -ENOMEM;
857
858 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
859 info->snd_portid, info->snd_seq, 0);
860 if (err) {
861 nlmsg_free(msg);
862 return err;
863 }
864
865 return genlmsg_reply(msg, info);
866 }
867
devlink_nl_cmd_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)868 static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
869 struct netlink_callback *cb)
870 {
871 struct devlink *devlink;
872 int start = cb->args[0];
873 int idx = 0;
874 int err;
875
876 mutex_lock(&devlink_mutex);
877 list_for_each_entry(devlink, &devlink_list, list) {
878 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
879 continue;
880 if (idx < start) {
881 idx++;
882 continue;
883 }
884 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
885 NETLINK_CB(cb->skb).portid,
886 cb->nlh->nlmsg_seq, NLM_F_MULTI);
887 if (err)
888 goto out;
889 idx++;
890 }
891 out:
892 mutex_unlock(&devlink_mutex);
893
894 cb->args[0] = idx;
895 return msg->len;
896 }
897
devlink_nl_cmd_port_get_doit(struct sk_buff * skb,struct genl_info * info)898 static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
899 struct genl_info *info)
900 {
901 struct devlink_port *devlink_port = info->user_ptr[1];
902 struct devlink *devlink = devlink_port->devlink;
903 struct sk_buff *msg;
904 int err;
905
906 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
907 if (!msg)
908 return -ENOMEM;
909
910 err = devlink_nl_port_fill(msg, devlink, devlink_port,
911 DEVLINK_CMD_PORT_NEW,
912 info->snd_portid, info->snd_seq, 0,
913 info->extack);
914 if (err) {
915 nlmsg_free(msg);
916 return err;
917 }
918
919 return genlmsg_reply(msg, info);
920 }
921
devlink_nl_cmd_port_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)922 static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
923 struct netlink_callback *cb)
924 {
925 struct devlink *devlink;
926 struct devlink_port *devlink_port;
927 int start = cb->args[0];
928 int idx = 0;
929 int err;
930
931 mutex_lock(&devlink_mutex);
932 list_for_each_entry(devlink, &devlink_list, list) {
933 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
934 continue;
935 mutex_lock(&devlink->lock);
936 list_for_each_entry(devlink_port, &devlink->port_list, list) {
937 if (idx < start) {
938 idx++;
939 continue;
940 }
941 err = devlink_nl_port_fill(msg, devlink, devlink_port,
942 DEVLINK_CMD_NEW,
943 NETLINK_CB(cb->skb).portid,
944 cb->nlh->nlmsg_seq,
945 NLM_F_MULTI,
946 cb->extack);
947 if (err) {
948 mutex_unlock(&devlink->lock);
949 goto out;
950 }
951 idx++;
952 }
953 mutex_unlock(&devlink->lock);
954 }
955 out:
956 mutex_unlock(&devlink_mutex);
957
958 cb->args[0] = idx;
959 return msg->len;
960 }
961
devlink_port_type_set(struct devlink * devlink,struct devlink_port * devlink_port,enum devlink_port_type port_type)962 static int devlink_port_type_set(struct devlink *devlink,
963 struct devlink_port *devlink_port,
964 enum devlink_port_type port_type)
965
966 {
967 int err;
968
969 if (devlink->ops->port_type_set) {
970 if (port_type == devlink_port->type)
971 return 0;
972 err = devlink->ops->port_type_set(devlink_port, port_type);
973 if (err)
974 return err;
975 devlink_port->desired_type = port_type;
976 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
977 return 0;
978 }
979 return -EOPNOTSUPP;
980 }
981
982 static int
devlink_port_function_hw_addr_set(struct devlink * devlink,struct devlink_port * port,const struct nlattr * attr,struct netlink_ext_ack * extack)983 devlink_port_function_hw_addr_set(struct devlink *devlink, struct devlink_port *port,
984 const struct nlattr *attr, struct netlink_ext_ack *extack)
985 {
986 const struct devlink_ops *ops;
987 const u8 *hw_addr;
988 int hw_addr_len;
989 int err;
990
991 hw_addr = nla_data(attr);
992 hw_addr_len = nla_len(attr);
993 if (hw_addr_len > MAX_ADDR_LEN) {
994 NL_SET_ERR_MSG_MOD(extack, "Port function hardware address too long");
995 return -EINVAL;
996 }
997 if (port->type == DEVLINK_PORT_TYPE_ETH) {
998 if (hw_addr_len != ETH_ALEN) {
999 NL_SET_ERR_MSG_MOD(extack, "Address must be 6 bytes for Ethernet device");
1000 return -EINVAL;
1001 }
1002 if (!is_unicast_ether_addr(hw_addr)) {
1003 NL_SET_ERR_MSG_MOD(extack, "Non-unicast hardware address unsupported");
1004 return -EINVAL;
1005 }
1006 }
1007
1008 ops = devlink->ops;
1009 if (!ops->port_function_hw_addr_set) {
1010 NL_SET_ERR_MSG_MOD(extack, "Port doesn't support function attributes");
1011 return -EOPNOTSUPP;
1012 }
1013
1014 err = ops->port_function_hw_addr_set(devlink, port, hw_addr, hw_addr_len, extack);
1015 if (err)
1016 return err;
1017
1018 devlink_port_notify(port, DEVLINK_CMD_PORT_NEW);
1019 return 0;
1020 }
1021
1022 static int
devlink_port_function_set(struct devlink * devlink,struct devlink_port * port,const struct nlattr * attr,struct netlink_ext_ack * extack)1023 devlink_port_function_set(struct devlink *devlink, struct devlink_port *port,
1024 const struct nlattr *attr, struct netlink_ext_ack *extack)
1025 {
1026 struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1];
1027 int err;
1028
1029 err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr,
1030 devlink_function_nl_policy, extack);
1031 if (err < 0) {
1032 NL_SET_ERR_MSG_MOD(extack, "Fail to parse port function attributes");
1033 return err;
1034 }
1035
1036 attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR];
1037 if (attr)
1038 err = devlink_port_function_hw_addr_set(devlink, port, attr, extack);
1039
1040 return err;
1041 }
1042
devlink_nl_cmd_port_set_doit(struct sk_buff * skb,struct genl_info * info)1043 static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
1044 struct genl_info *info)
1045 {
1046 struct devlink_port *devlink_port = info->user_ptr[1];
1047 struct devlink *devlink = devlink_port->devlink;
1048 int err;
1049
1050 if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
1051 enum devlink_port_type port_type;
1052
1053 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
1054 err = devlink_port_type_set(devlink, devlink_port, port_type);
1055 if (err)
1056 return err;
1057 }
1058
1059 if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) {
1060 struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION];
1061 struct netlink_ext_ack *extack = info->extack;
1062
1063 err = devlink_port_function_set(devlink, devlink_port, attr, extack);
1064 if (err)
1065 return err;
1066 }
1067
1068 return 0;
1069 }
1070
devlink_port_split(struct devlink * devlink,u32 port_index,u32 count,struct netlink_ext_ack * extack)1071 static int devlink_port_split(struct devlink *devlink, u32 port_index,
1072 u32 count, struct netlink_ext_ack *extack)
1073
1074 {
1075 if (devlink->ops->port_split)
1076 return devlink->ops->port_split(devlink, port_index, count,
1077 extack);
1078 return -EOPNOTSUPP;
1079 }
1080
devlink_nl_cmd_port_split_doit(struct sk_buff * skb,struct genl_info * info)1081 static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
1082 struct genl_info *info)
1083 {
1084 struct devlink *devlink = info->user_ptr[0];
1085 struct devlink_port *devlink_port;
1086 u32 port_index;
1087 u32 count;
1088
1089 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
1090 !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
1091 return -EINVAL;
1092
1093 devlink_port = devlink_port_get_from_info(devlink, info);
1094 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
1095 count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
1096
1097 if (IS_ERR(devlink_port))
1098 return -EINVAL;
1099
1100 if (!devlink_port->attrs.splittable) {
1101 /* Split ports cannot be split. */
1102 if (devlink_port->attrs.split)
1103 NL_SET_ERR_MSG_MOD(info->extack, "Port cannot be split further");
1104 else
1105 NL_SET_ERR_MSG_MOD(info->extack, "Port cannot be split");
1106 return -EINVAL;
1107 }
1108
1109 if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) {
1110 NL_SET_ERR_MSG_MOD(info->extack, "Invalid split count");
1111 return -EINVAL;
1112 }
1113
1114 return devlink_port_split(devlink, port_index, count, info->extack);
1115 }
1116
devlink_port_unsplit(struct devlink * devlink,u32 port_index,struct netlink_ext_ack * extack)1117 static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
1118 struct netlink_ext_ack *extack)
1119
1120 {
1121 if (devlink->ops->port_unsplit)
1122 return devlink->ops->port_unsplit(devlink, port_index, extack);
1123 return -EOPNOTSUPP;
1124 }
1125
devlink_nl_cmd_port_unsplit_doit(struct sk_buff * skb,struct genl_info * info)1126 static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
1127 struct genl_info *info)
1128 {
1129 struct devlink *devlink = info->user_ptr[0];
1130 u32 port_index;
1131
1132 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
1133 return -EINVAL;
1134
1135 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
1136 return devlink_port_unsplit(devlink, port_index, info->extack);
1137 }
1138
devlink_nl_sb_fill(struct sk_buff * msg,struct devlink * devlink,struct devlink_sb * devlink_sb,enum devlink_command cmd,u32 portid,u32 seq,int flags)1139 static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
1140 struct devlink_sb *devlink_sb,
1141 enum devlink_command cmd, u32 portid,
1142 u32 seq, int flags)
1143 {
1144 void *hdr;
1145
1146 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1147 if (!hdr)
1148 return -EMSGSIZE;
1149
1150 if (devlink_nl_put_handle(msg, devlink))
1151 goto nla_put_failure;
1152 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1153 goto nla_put_failure;
1154 if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
1155 goto nla_put_failure;
1156 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
1157 devlink_sb->ingress_pools_count))
1158 goto nla_put_failure;
1159 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
1160 devlink_sb->egress_pools_count))
1161 goto nla_put_failure;
1162 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
1163 devlink_sb->ingress_tc_count))
1164 goto nla_put_failure;
1165 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
1166 devlink_sb->egress_tc_count))
1167 goto nla_put_failure;
1168
1169 genlmsg_end(msg, hdr);
1170 return 0;
1171
1172 nla_put_failure:
1173 genlmsg_cancel(msg, hdr);
1174 return -EMSGSIZE;
1175 }
1176
devlink_nl_cmd_sb_get_doit(struct sk_buff * skb,struct genl_info * info)1177 static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
1178 struct genl_info *info)
1179 {
1180 struct devlink *devlink = info->user_ptr[0];
1181 struct devlink_sb *devlink_sb;
1182 struct sk_buff *msg;
1183 int err;
1184
1185 devlink_sb = devlink_sb_get_from_info(devlink, info);
1186 if (IS_ERR(devlink_sb))
1187 return PTR_ERR(devlink_sb);
1188
1189 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1190 if (!msg)
1191 return -ENOMEM;
1192
1193 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
1194 DEVLINK_CMD_SB_NEW,
1195 info->snd_portid, info->snd_seq, 0);
1196 if (err) {
1197 nlmsg_free(msg);
1198 return err;
1199 }
1200
1201 return genlmsg_reply(msg, info);
1202 }
1203
devlink_nl_cmd_sb_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)1204 static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
1205 struct netlink_callback *cb)
1206 {
1207 struct devlink *devlink;
1208 struct devlink_sb *devlink_sb;
1209 int start = cb->args[0];
1210 int idx = 0;
1211 int err;
1212
1213 mutex_lock(&devlink_mutex);
1214 list_for_each_entry(devlink, &devlink_list, list) {
1215 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
1216 continue;
1217 mutex_lock(&devlink->lock);
1218 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1219 if (idx < start) {
1220 idx++;
1221 continue;
1222 }
1223 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
1224 DEVLINK_CMD_SB_NEW,
1225 NETLINK_CB(cb->skb).portid,
1226 cb->nlh->nlmsg_seq,
1227 NLM_F_MULTI);
1228 if (err) {
1229 mutex_unlock(&devlink->lock);
1230 goto out;
1231 }
1232 idx++;
1233 }
1234 mutex_unlock(&devlink->lock);
1235 }
1236 out:
1237 mutex_unlock(&devlink_mutex);
1238
1239 cb->args[0] = idx;
1240 return msg->len;
1241 }
1242
devlink_nl_sb_pool_fill(struct sk_buff * msg,struct devlink * devlink,struct devlink_sb * devlink_sb,u16 pool_index,enum devlink_command cmd,u32 portid,u32 seq,int flags)1243 static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
1244 struct devlink_sb *devlink_sb,
1245 u16 pool_index, enum devlink_command cmd,
1246 u32 portid, u32 seq, int flags)
1247 {
1248 struct devlink_sb_pool_info pool_info;
1249 void *hdr;
1250 int err;
1251
1252 err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
1253 pool_index, &pool_info);
1254 if (err)
1255 return err;
1256
1257 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1258 if (!hdr)
1259 return -EMSGSIZE;
1260
1261 if (devlink_nl_put_handle(msg, devlink))
1262 goto nla_put_failure;
1263 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1264 goto nla_put_failure;
1265 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1266 goto nla_put_failure;
1267 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
1268 goto nla_put_failure;
1269 if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
1270 goto nla_put_failure;
1271 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
1272 pool_info.threshold_type))
1273 goto nla_put_failure;
1274 if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_CELL_SIZE,
1275 pool_info.cell_size))
1276 goto nla_put_failure;
1277
1278 genlmsg_end(msg, hdr);
1279 return 0;
1280
1281 nla_put_failure:
1282 genlmsg_cancel(msg, hdr);
1283 return -EMSGSIZE;
1284 }
1285
devlink_nl_cmd_sb_pool_get_doit(struct sk_buff * skb,struct genl_info * info)1286 static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
1287 struct genl_info *info)
1288 {
1289 struct devlink *devlink = info->user_ptr[0];
1290 struct devlink_sb *devlink_sb;
1291 struct sk_buff *msg;
1292 u16 pool_index;
1293 int err;
1294
1295 devlink_sb = devlink_sb_get_from_info(devlink, info);
1296 if (IS_ERR(devlink_sb))
1297 return PTR_ERR(devlink_sb);
1298
1299 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1300 &pool_index);
1301 if (err)
1302 return err;
1303
1304 if (!devlink->ops->sb_pool_get)
1305 return -EOPNOTSUPP;
1306
1307 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1308 if (!msg)
1309 return -ENOMEM;
1310
1311 err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
1312 DEVLINK_CMD_SB_POOL_NEW,
1313 info->snd_portid, info->snd_seq, 0);
1314 if (err) {
1315 nlmsg_free(msg);
1316 return err;
1317 }
1318
1319 return genlmsg_reply(msg, info);
1320 }
1321
__sb_pool_get_dumpit(struct sk_buff * msg,int start,int * p_idx,struct devlink * devlink,struct devlink_sb * devlink_sb,u32 portid,u32 seq)1322 static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1323 struct devlink *devlink,
1324 struct devlink_sb *devlink_sb,
1325 u32 portid, u32 seq)
1326 {
1327 u16 pool_count = devlink_sb_pool_count(devlink_sb);
1328 u16 pool_index;
1329 int err;
1330
1331 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1332 if (*p_idx < start) {
1333 (*p_idx)++;
1334 continue;
1335 }
1336 err = devlink_nl_sb_pool_fill(msg, devlink,
1337 devlink_sb,
1338 pool_index,
1339 DEVLINK_CMD_SB_POOL_NEW,
1340 portid, seq, NLM_F_MULTI);
1341 if (err)
1342 return err;
1343 (*p_idx)++;
1344 }
1345 return 0;
1346 }
1347
devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)1348 static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
1349 struct netlink_callback *cb)
1350 {
1351 struct devlink *devlink;
1352 struct devlink_sb *devlink_sb;
1353 int start = cb->args[0];
1354 int idx = 0;
1355 int err = 0;
1356
1357 mutex_lock(&devlink_mutex);
1358 list_for_each_entry(devlink, &devlink_list, list) {
1359 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1360 !devlink->ops->sb_pool_get)
1361 continue;
1362 mutex_lock(&devlink->lock);
1363 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1364 err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
1365 devlink_sb,
1366 NETLINK_CB(cb->skb).portid,
1367 cb->nlh->nlmsg_seq);
1368 if (err == -EOPNOTSUPP) {
1369 err = 0;
1370 } else if (err) {
1371 mutex_unlock(&devlink->lock);
1372 goto out;
1373 }
1374 }
1375 mutex_unlock(&devlink->lock);
1376 }
1377 out:
1378 mutex_unlock(&devlink_mutex);
1379
1380 if (err != -EMSGSIZE)
1381 return err;
1382
1383 cb->args[0] = idx;
1384 return msg->len;
1385 }
1386
devlink_sb_pool_set(struct devlink * devlink,unsigned int sb_index,u16 pool_index,u32 size,enum devlink_sb_threshold_type threshold_type,struct netlink_ext_ack * extack)1387 static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
1388 u16 pool_index, u32 size,
1389 enum devlink_sb_threshold_type threshold_type,
1390 struct netlink_ext_ack *extack)
1391
1392 {
1393 const struct devlink_ops *ops = devlink->ops;
1394
1395 if (ops->sb_pool_set)
1396 return ops->sb_pool_set(devlink, sb_index, pool_index,
1397 size, threshold_type, extack);
1398 return -EOPNOTSUPP;
1399 }
1400
devlink_nl_cmd_sb_pool_set_doit(struct sk_buff * skb,struct genl_info * info)1401 static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
1402 struct genl_info *info)
1403 {
1404 struct devlink *devlink = info->user_ptr[0];
1405 enum devlink_sb_threshold_type threshold_type;
1406 struct devlink_sb *devlink_sb;
1407 u16 pool_index;
1408 u32 size;
1409 int err;
1410
1411 devlink_sb = devlink_sb_get_from_info(devlink, info);
1412 if (IS_ERR(devlink_sb))
1413 return PTR_ERR(devlink_sb);
1414
1415 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1416 &pool_index);
1417 if (err)
1418 return err;
1419
1420 err = devlink_sb_th_type_get_from_info(info, &threshold_type);
1421 if (err)
1422 return err;
1423
1424 if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
1425 return -EINVAL;
1426
1427 size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
1428 return devlink_sb_pool_set(devlink, devlink_sb->index,
1429 pool_index, size, threshold_type,
1430 info->extack);
1431 }
1432
devlink_nl_sb_port_pool_fill(struct sk_buff * msg,struct devlink * devlink,struct devlink_port * devlink_port,struct devlink_sb * devlink_sb,u16 pool_index,enum devlink_command cmd,u32 portid,u32 seq,int flags)1433 static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
1434 struct devlink *devlink,
1435 struct devlink_port *devlink_port,
1436 struct devlink_sb *devlink_sb,
1437 u16 pool_index,
1438 enum devlink_command cmd,
1439 u32 portid, u32 seq, int flags)
1440 {
1441 const struct devlink_ops *ops = devlink->ops;
1442 u32 threshold;
1443 void *hdr;
1444 int err;
1445
1446 err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
1447 pool_index, &threshold);
1448 if (err)
1449 return err;
1450
1451 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1452 if (!hdr)
1453 return -EMSGSIZE;
1454
1455 if (devlink_nl_put_handle(msg, devlink))
1456 goto nla_put_failure;
1457 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1458 goto nla_put_failure;
1459 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1460 goto nla_put_failure;
1461 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1462 goto nla_put_failure;
1463 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1464 goto nla_put_failure;
1465
1466 if (ops->sb_occ_port_pool_get) {
1467 u32 cur;
1468 u32 max;
1469
1470 err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
1471 pool_index, &cur, &max);
1472 if (err && err != -EOPNOTSUPP)
1473 goto sb_occ_get_failure;
1474 if (!err) {
1475 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1476 goto nla_put_failure;
1477 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1478 goto nla_put_failure;
1479 }
1480 }
1481
1482 genlmsg_end(msg, hdr);
1483 return 0;
1484
1485 nla_put_failure:
1486 err = -EMSGSIZE;
1487 sb_occ_get_failure:
1488 genlmsg_cancel(msg, hdr);
1489 return err;
1490 }
1491
devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff * skb,struct genl_info * info)1492 static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
1493 struct genl_info *info)
1494 {
1495 struct devlink_port *devlink_port = info->user_ptr[1];
1496 struct devlink *devlink = devlink_port->devlink;
1497 struct devlink_sb *devlink_sb;
1498 struct sk_buff *msg;
1499 u16 pool_index;
1500 int err;
1501
1502 devlink_sb = devlink_sb_get_from_info(devlink, info);
1503 if (IS_ERR(devlink_sb))
1504 return PTR_ERR(devlink_sb);
1505
1506 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1507 &pool_index);
1508 if (err)
1509 return err;
1510
1511 if (!devlink->ops->sb_port_pool_get)
1512 return -EOPNOTSUPP;
1513
1514 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1515 if (!msg)
1516 return -ENOMEM;
1517
1518 err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
1519 devlink_sb, pool_index,
1520 DEVLINK_CMD_SB_PORT_POOL_NEW,
1521 info->snd_portid, info->snd_seq, 0);
1522 if (err) {
1523 nlmsg_free(msg);
1524 return err;
1525 }
1526
1527 return genlmsg_reply(msg, info);
1528 }
1529
__sb_port_pool_get_dumpit(struct sk_buff * msg,int start,int * p_idx,struct devlink * devlink,struct devlink_sb * devlink_sb,u32 portid,u32 seq)1530 static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1531 struct devlink *devlink,
1532 struct devlink_sb *devlink_sb,
1533 u32 portid, u32 seq)
1534 {
1535 struct devlink_port *devlink_port;
1536 u16 pool_count = devlink_sb_pool_count(devlink_sb);
1537 u16 pool_index;
1538 int err;
1539
1540 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1541 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1542 if (*p_idx < start) {
1543 (*p_idx)++;
1544 continue;
1545 }
1546 err = devlink_nl_sb_port_pool_fill(msg, devlink,
1547 devlink_port,
1548 devlink_sb,
1549 pool_index,
1550 DEVLINK_CMD_SB_PORT_POOL_NEW,
1551 portid, seq,
1552 NLM_F_MULTI);
1553 if (err)
1554 return err;
1555 (*p_idx)++;
1556 }
1557 }
1558 return 0;
1559 }
1560
devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)1561 static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
1562 struct netlink_callback *cb)
1563 {
1564 struct devlink *devlink;
1565 struct devlink_sb *devlink_sb;
1566 int start = cb->args[0];
1567 int idx = 0;
1568 int err = 0;
1569
1570 mutex_lock(&devlink_mutex);
1571 list_for_each_entry(devlink, &devlink_list, list) {
1572 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1573 !devlink->ops->sb_port_pool_get)
1574 continue;
1575 mutex_lock(&devlink->lock);
1576 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1577 err = __sb_port_pool_get_dumpit(msg, start, &idx,
1578 devlink, devlink_sb,
1579 NETLINK_CB(cb->skb).portid,
1580 cb->nlh->nlmsg_seq);
1581 if (err == -EOPNOTSUPP) {
1582 err = 0;
1583 } else if (err) {
1584 mutex_unlock(&devlink->lock);
1585 goto out;
1586 }
1587 }
1588 mutex_unlock(&devlink->lock);
1589 }
1590 out:
1591 mutex_unlock(&devlink_mutex);
1592
1593 if (err != -EMSGSIZE)
1594 return err;
1595
1596 cb->args[0] = idx;
1597 return msg->len;
1598 }
1599
devlink_sb_port_pool_set(struct devlink_port * devlink_port,unsigned int sb_index,u16 pool_index,u32 threshold,struct netlink_ext_ack * extack)1600 static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1601 unsigned int sb_index, u16 pool_index,
1602 u32 threshold,
1603 struct netlink_ext_ack *extack)
1604
1605 {
1606 const struct devlink_ops *ops = devlink_port->devlink->ops;
1607
1608 if (ops->sb_port_pool_set)
1609 return ops->sb_port_pool_set(devlink_port, sb_index,
1610 pool_index, threshold, extack);
1611 return -EOPNOTSUPP;
1612 }
1613
devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff * skb,struct genl_info * info)1614 static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
1615 struct genl_info *info)
1616 {
1617 struct devlink_port *devlink_port = info->user_ptr[1];
1618 struct devlink *devlink = info->user_ptr[0];
1619 struct devlink_sb *devlink_sb;
1620 u16 pool_index;
1621 u32 threshold;
1622 int err;
1623
1624 devlink_sb = devlink_sb_get_from_info(devlink, info);
1625 if (IS_ERR(devlink_sb))
1626 return PTR_ERR(devlink_sb);
1627
1628 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1629 &pool_index);
1630 if (err)
1631 return err;
1632
1633 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1634 return -EINVAL;
1635
1636 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1637 return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
1638 pool_index, threshold, info->extack);
1639 }
1640
1641 static int
devlink_nl_sb_tc_pool_bind_fill(struct sk_buff * msg,struct devlink * devlink,struct devlink_port * devlink_port,struct devlink_sb * devlink_sb,u16 tc_index,enum devlink_sb_pool_type pool_type,enum devlink_command cmd,u32 portid,u32 seq,int flags)1642 devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
1643 struct devlink_port *devlink_port,
1644 struct devlink_sb *devlink_sb, u16 tc_index,
1645 enum devlink_sb_pool_type pool_type,
1646 enum devlink_command cmd,
1647 u32 portid, u32 seq, int flags)
1648 {
1649 const struct devlink_ops *ops = devlink->ops;
1650 u16 pool_index;
1651 u32 threshold;
1652 void *hdr;
1653 int err;
1654
1655 err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
1656 tc_index, pool_type,
1657 &pool_index, &threshold);
1658 if (err)
1659 return err;
1660
1661 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1662 if (!hdr)
1663 return -EMSGSIZE;
1664
1665 if (devlink_nl_put_handle(msg, devlink))
1666 goto nla_put_failure;
1667 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1668 goto nla_put_failure;
1669 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1670 goto nla_put_failure;
1671 if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
1672 goto nla_put_failure;
1673 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
1674 goto nla_put_failure;
1675 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1676 goto nla_put_failure;
1677 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1678 goto nla_put_failure;
1679
1680 if (ops->sb_occ_tc_port_bind_get) {
1681 u32 cur;
1682 u32 max;
1683
1684 err = ops->sb_occ_tc_port_bind_get(devlink_port,
1685 devlink_sb->index,
1686 tc_index, pool_type,
1687 &cur, &max);
1688 if (err && err != -EOPNOTSUPP)
1689 return err;
1690 if (!err) {
1691 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1692 goto nla_put_failure;
1693 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1694 goto nla_put_failure;
1695 }
1696 }
1697
1698 genlmsg_end(msg, hdr);
1699 return 0;
1700
1701 nla_put_failure:
1702 genlmsg_cancel(msg, hdr);
1703 return -EMSGSIZE;
1704 }
1705
devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff * skb,struct genl_info * info)1706 static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
1707 struct genl_info *info)
1708 {
1709 struct devlink_port *devlink_port = info->user_ptr[1];
1710 struct devlink *devlink = devlink_port->devlink;
1711 struct devlink_sb *devlink_sb;
1712 struct sk_buff *msg;
1713 enum devlink_sb_pool_type pool_type;
1714 u16 tc_index;
1715 int err;
1716
1717 devlink_sb = devlink_sb_get_from_info(devlink, info);
1718 if (IS_ERR(devlink_sb))
1719 return PTR_ERR(devlink_sb);
1720
1721 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1722 if (err)
1723 return err;
1724
1725 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1726 pool_type, &tc_index);
1727 if (err)
1728 return err;
1729
1730 if (!devlink->ops->sb_tc_pool_bind_get)
1731 return -EOPNOTSUPP;
1732
1733 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1734 if (!msg)
1735 return -ENOMEM;
1736
1737 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
1738 devlink_sb, tc_index, pool_type,
1739 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1740 info->snd_portid,
1741 info->snd_seq, 0);
1742 if (err) {
1743 nlmsg_free(msg);
1744 return err;
1745 }
1746
1747 return genlmsg_reply(msg, info);
1748 }
1749
__sb_tc_pool_bind_get_dumpit(struct sk_buff * msg,int start,int * p_idx,struct devlink * devlink,struct devlink_sb * devlink_sb,u32 portid,u32 seq)1750 static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1751 int start, int *p_idx,
1752 struct devlink *devlink,
1753 struct devlink_sb *devlink_sb,
1754 u32 portid, u32 seq)
1755 {
1756 struct devlink_port *devlink_port;
1757 u16 tc_index;
1758 int err;
1759
1760 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1761 for (tc_index = 0;
1762 tc_index < devlink_sb->ingress_tc_count; tc_index++) {
1763 if (*p_idx < start) {
1764 (*p_idx)++;
1765 continue;
1766 }
1767 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1768 devlink_port,
1769 devlink_sb,
1770 tc_index,
1771 DEVLINK_SB_POOL_TYPE_INGRESS,
1772 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1773 portid, seq,
1774 NLM_F_MULTI);
1775 if (err)
1776 return err;
1777 (*p_idx)++;
1778 }
1779 for (tc_index = 0;
1780 tc_index < devlink_sb->egress_tc_count; tc_index++) {
1781 if (*p_idx < start) {
1782 (*p_idx)++;
1783 continue;
1784 }
1785 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1786 devlink_port,
1787 devlink_sb,
1788 tc_index,
1789 DEVLINK_SB_POOL_TYPE_EGRESS,
1790 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1791 portid, seq,
1792 NLM_F_MULTI);
1793 if (err)
1794 return err;
1795 (*p_idx)++;
1796 }
1797 }
1798 return 0;
1799 }
1800
1801 static int
devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)1802 devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1803 struct netlink_callback *cb)
1804 {
1805 struct devlink *devlink;
1806 struct devlink_sb *devlink_sb;
1807 int start = cb->args[0];
1808 int idx = 0;
1809 int err = 0;
1810
1811 mutex_lock(&devlink_mutex);
1812 list_for_each_entry(devlink, &devlink_list, list) {
1813 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1814 !devlink->ops->sb_tc_pool_bind_get)
1815 continue;
1816
1817 mutex_lock(&devlink->lock);
1818 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1819 err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
1820 devlink,
1821 devlink_sb,
1822 NETLINK_CB(cb->skb).portid,
1823 cb->nlh->nlmsg_seq);
1824 if (err == -EOPNOTSUPP) {
1825 err = 0;
1826 } else if (err) {
1827 mutex_unlock(&devlink->lock);
1828 goto out;
1829 }
1830 }
1831 mutex_unlock(&devlink->lock);
1832 }
1833 out:
1834 mutex_unlock(&devlink_mutex);
1835
1836 if (err != -EMSGSIZE)
1837 return err;
1838
1839 cb->args[0] = idx;
1840 return msg->len;
1841 }
1842
devlink_sb_tc_pool_bind_set(struct devlink_port * devlink_port,unsigned int sb_index,u16 tc_index,enum devlink_sb_pool_type pool_type,u16 pool_index,u32 threshold,struct netlink_ext_ack * extack)1843 static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1844 unsigned int sb_index, u16 tc_index,
1845 enum devlink_sb_pool_type pool_type,
1846 u16 pool_index, u32 threshold,
1847 struct netlink_ext_ack *extack)
1848
1849 {
1850 const struct devlink_ops *ops = devlink_port->devlink->ops;
1851
1852 if (ops->sb_tc_pool_bind_set)
1853 return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
1854 tc_index, pool_type,
1855 pool_index, threshold, extack);
1856 return -EOPNOTSUPP;
1857 }
1858
devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff * skb,struct genl_info * info)1859 static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
1860 struct genl_info *info)
1861 {
1862 struct devlink_port *devlink_port = info->user_ptr[1];
1863 struct devlink *devlink = info->user_ptr[0];
1864 enum devlink_sb_pool_type pool_type;
1865 struct devlink_sb *devlink_sb;
1866 u16 tc_index;
1867 u16 pool_index;
1868 u32 threshold;
1869 int err;
1870
1871 devlink_sb = devlink_sb_get_from_info(devlink, info);
1872 if (IS_ERR(devlink_sb))
1873 return PTR_ERR(devlink_sb);
1874
1875 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1876 if (err)
1877 return err;
1878
1879 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1880 pool_type, &tc_index);
1881 if (err)
1882 return err;
1883
1884 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1885 &pool_index);
1886 if (err)
1887 return err;
1888
1889 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1890 return -EINVAL;
1891
1892 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1893 return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
1894 tc_index, pool_type,
1895 pool_index, threshold, info->extack);
1896 }
1897
devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff * skb,struct genl_info * info)1898 static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
1899 struct genl_info *info)
1900 {
1901 struct devlink *devlink = info->user_ptr[0];
1902 const struct devlink_ops *ops = devlink->ops;
1903 struct devlink_sb *devlink_sb;
1904
1905 devlink_sb = devlink_sb_get_from_info(devlink, info);
1906 if (IS_ERR(devlink_sb))
1907 return PTR_ERR(devlink_sb);
1908
1909 if (ops->sb_occ_snapshot)
1910 return ops->sb_occ_snapshot(devlink, devlink_sb->index);
1911 return -EOPNOTSUPP;
1912 }
1913
devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff * skb,struct genl_info * info)1914 static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
1915 struct genl_info *info)
1916 {
1917 struct devlink *devlink = info->user_ptr[0];
1918 const struct devlink_ops *ops = devlink->ops;
1919 struct devlink_sb *devlink_sb;
1920
1921 devlink_sb = devlink_sb_get_from_info(devlink, info);
1922 if (IS_ERR(devlink_sb))
1923 return PTR_ERR(devlink_sb);
1924
1925 if (ops->sb_occ_max_clear)
1926 return ops->sb_occ_max_clear(devlink, devlink_sb->index);
1927 return -EOPNOTSUPP;
1928 }
1929
devlink_nl_eswitch_fill(struct sk_buff * msg,struct devlink * devlink,enum devlink_command cmd,u32 portid,u32 seq,int flags)1930 static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
1931 enum devlink_command cmd, u32 portid,
1932 u32 seq, int flags)
1933 {
1934 const struct devlink_ops *ops = devlink->ops;
1935 enum devlink_eswitch_encap_mode encap_mode;
1936 u8 inline_mode;
1937 void *hdr;
1938 int err = 0;
1939 u16 mode;
1940
1941 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1942 if (!hdr)
1943 return -EMSGSIZE;
1944
1945 err = devlink_nl_put_handle(msg, devlink);
1946 if (err)
1947 goto nla_put_failure;
1948
1949 if (ops->eswitch_mode_get) {
1950 err = ops->eswitch_mode_get(devlink, &mode);
1951 if (err)
1952 goto nla_put_failure;
1953 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
1954 if (err)
1955 goto nla_put_failure;
1956 }
1957
1958 if (ops->eswitch_inline_mode_get) {
1959 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
1960 if (err)
1961 goto nla_put_failure;
1962 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
1963 inline_mode);
1964 if (err)
1965 goto nla_put_failure;
1966 }
1967
1968 if (ops->eswitch_encap_mode_get) {
1969 err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
1970 if (err)
1971 goto nla_put_failure;
1972 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode);
1973 if (err)
1974 goto nla_put_failure;
1975 }
1976
1977 genlmsg_end(msg, hdr);
1978 return 0;
1979
1980 nla_put_failure:
1981 genlmsg_cancel(msg, hdr);
1982 return err;
1983 }
1984
devlink_nl_cmd_eswitch_get_doit(struct sk_buff * skb,struct genl_info * info)1985 static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb,
1986 struct genl_info *info)
1987 {
1988 struct devlink *devlink = info->user_ptr[0];
1989 struct sk_buff *msg;
1990 int err;
1991
1992 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1993 if (!msg)
1994 return -ENOMEM;
1995
1996 err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET,
1997 info->snd_portid, info->snd_seq, 0);
1998
1999 if (err) {
2000 nlmsg_free(msg);
2001 return err;
2002 }
2003
2004 return genlmsg_reply(msg, info);
2005 }
2006
devlink_nl_cmd_eswitch_set_doit(struct sk_buff * skb,struct genl_info * info)2007 static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
2008 struct genl_info *info)
2009 {
2010 struct devlink *devlink = info->user_ptr[0];
2011 const struct devlink_ops *ops = devlink->ops;
2012 enum devlink_eswitch_encap_mode encap_mode;
2013 u8 inline_mode;
2014 int err = 0;
2015 u16 mode;
2016
2017 if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
2018 if (!ops->eswitch_mode_set)
2019 return -EOPNOTSUPP;
2020 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
2021 err = ops->eswitch_mode_set(devlink, mode, info->extack);
2022 if (err)
2023 return err;
2024 }
2025
2026 if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
2027 if (!ops->eswitch_inline_mode_set)
2028 return -EOPNOTSUPP;
2029 inline_mode = nla_get_u8(
2030 info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
2031 err = ops->eswitch_inline_mode_set(devlink, inline_mode,
2032 info->extack);
2033 if (err)
2034 return err;
2035 }
2036
2037 if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) {
2038 if (!ops->eswitch_encap_mode_set)
2039 return -EOPNOTSUPP;
2040 encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]);
2041 err = ops->eswitch_encap_mode_set(devlink, encap_mode,
2042 info->extack);
2043 if (err)
2044 return err;
2045 }
2046
2047 return 0;
2048 }
2049
devlink_dpipe_match_put(struct sk_buff * skb,struct devlink_dpipe_match * match)2050 int devlink_dpipe_match_put(struct sk_buff *skb,
2051 struct devlink_dpipe_match *match)
2052 {
2053 struct devlink_dpipe_header *header = match->header;
2054 struct devlink_dpipe_field *field = &header->fields[match->field_id];
2055 struct nlattr *match_attr;
2056
2057 match_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_MATCH);
2058 if (!match_attr)
2059 return -EMSGSIZE;
2060
2061 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
2062 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
2063 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2064 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2065 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2066 goto nla_put_failure;
2067
2068 nla_nest_end(skb, match_attr);
2069 return 0;
2070
2071 nla_put_failure:
2072 nla_nest_cancel(skb, match_attr);
2073 return -EMSGSIZE;
2074 }
2075 EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
2076
devlink_dpipe_matches_put(struct devlink_dpipe_table * table,struct sk_buff * skb)2077 static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
2078 struct sk_buff *skb)
2079 {
2080 struct nlattr *matches_attr;
2081
2082 matches_attr = nla_nest_start_noflag(skb,
2083 DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
2084 if (!matches_attr)
2085 return -EMSGSIZE;
2086
2087 if (table->table_ops->matches_dump(table->priv, skb))
2088 goto nla_put_failure;
2089
2090 nla_nest_end(skb, matches_attr);
2091 return 0;
2092
2093 nla_put_failure:
2094 nla_nest_cancel(skb, matches_attr);
2095 return -EMSGSIZE;
2096 }
2097
devlink_dpipe_action_put(struct sk_buff * skb,struct devlink_dpipe_action * action)2098 int devlink_dpipe_action_put(struct sk_buff *skb,
2099 struct devlink_dpipe_action *action)
2100 {
2101 struct devlink_dpipe_header *header = action->header;
2102 struct devlink_dpipe_field *field = &header->fields[action->field_id];
2103 struct nlattr *action_attr;
2104
2105 action_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ACTION);
2106 if (!action_attr)
2107 return -EMSGSIZE;
2108
2109 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
2110 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
2111 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2112 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2113 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2114 goto nla_put_failure;
2115
2116 nla_nest_end(skb, action_attr);
2117 return 0;
2118
2119 nla_put_failure:
2120 nla_nest_cancel(skb, action_attr);
2121 return -EMSGSIZE;
2122 }
2123 EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
2124
devlink_dpipe_actions_put(struct devlink_dpipe_table * table,struct sk_buff * skb)2125 static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
2126 struct sk_buff *skb)
2127 {
2128 struct nlattr *actions_attr;
2129
2130 actions_attr = nla_nest_start_noflag(skb,
2131 DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
2132 if (!actions_attr)
2133 return -EMSGSIZE;
2134
2135 if (table->table_ops->actions_dump(table->priv, skb))
2136 goto nla_put_failure;
2137
2138 nla_nest_end(skb, actions_attr);
2139 return 0;
2140
2141 nla_put_failure:
2142 nla_nest_cancel(skb, actions_attr);
2143 return -EMSGSIZE;
2144 }
2145
devlink_dpipe_table_put(struct sk_buff * skb,struct devlink_dpipe_table * table)2146 static int devlink_dpipe_table_put(struct sk_buff *skb,
2147 struct devlink_dpipe_table *table)
2148 {
2149 struct nlattr *table_attr;
2150 u64 table_size;
2151
2152 table_size = table->table_ops->size_get(table->priv);
2153 table_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLE);
2154 if (!table_attr)
2155 return -EMSGSIZE;
2156
2157 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
2158 nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size,
2159 DEVLINK_ATTR_PAD))
2160 goto nla_put_failure;
2161 if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
2162 table->counters_enabled))
2163 goto nla_put_failure;
2164
2165 if (table->resource_valid) {
2166 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
2167 table->resource_id, DEVLINK_ATTR_PAD) ||
2168 nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
2169 table->resource_units, DEVLINK_ATTR_PAD))
2170 goto nla_put_failure;
2171 }
2172 if (devlink_dpipe_matches_put(table, skb))
2173 goto nla_put_failure;
2174
2175 if (devlink_dpipe_actions_put(table, skb))
2176 goto nla_put_failure;
2177
2178 nla_nest_end(skb, table_attr);
2179 return 0;
2180
2181 nla_put_failure:
2182 nla_nest_cancel(skb, table_attr);
2183 return -EMSGSIZE;
2184 }
2185
devlink_dpipe_send_and_alloc_skb(struct sk_buff ** pskb,struct genl_info * info)2186 static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
2187 struct genl_info *info)
2188 {
2189 int err;
2190
2191 if (*pskb) {
2192 err = genlmsg_reply(*pskb, info);
2193 if (err)
2194 return err;
2195 }
2196 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2197 if (!*pskb)
2198 return -ENOMEM;
2199 return 0;
2200 }
2201
devlink_dpipe_tables_fill(struct genl_info * info,enum devlink_command cmd,int flags,struct list_head * dpipe_tables,const char * table_name)2202 static int devlink_dpipe_tables_fill(struct genl_info *info,
2203 enum devlink_command cmd, int flags,
2204 struct list_head *dpipe_tables,
2205 const char *table_name)
2206 {
2207 struct devlink *devlink = info->user_ptr[0];
2208 struct devlink_dpipe_table *table;
2209 struct nlattr *tables_attr;
2210 struct sk_buff *skb = NULL;
2211 struct nlmsghdr *nlh;
2212 bool incomplete;
2213 void *hdr;
2214 int i;
2215 int err;
2216
2217 table = list_first_entry(dpipe_tables,
2218 struct devlink_dpipe_table, list);
2219 start_again:
2220 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2221 if (err)
2222 return err;
2223
2224 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2225 &devlink_nl_family, NLM_F_MULTI, cmd);
2226 if (!hdr) {
2227 nlmsg_free(skb);
2228 return -EMSGSIZE;
2229 }
2230
2231 if (devlink_nl_put_handle(skb, devlink))
2232 goto nla_put_failure;
2233 tables_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLES);
2234 if (!tables_attr)
2235 goto nla_put_failure;
2236
2237 i = 0;
2238 incomplete = false;
2239 list_for_each_entry_from(table, dpipe_tables, list) {
2240 if (!table_name) {
2241 err = devlink_dpipe_table_put(skb, table);
2242 if (err) {
2243 if (!i)
2244 goto err_table_put;
2245 incomplete = true;
2246 break;
2247 }
2248 } else {
2249 if (!strcmp(table->name, table_name)) {
2250 err = devlink_dpipe_table_put(skb, table);
2251 if (err)
2252 break;
2253 }
2254 }
2255 i++;
2256 }
2257
2258 nla_nest_end(skb, tables_attr);
2259 genlmsg_end(skb, hdr);
2260 if (incomplete)
2261 goto start_again;
2262
2263 send_done:
2264 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2265 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2266 if (!nlh) {
2267 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2268 if (err)
2269 return err;
2270 goto send_done;
2271 }
2272
2273 return genlmsg_reply(skb, info);
2274
2275 nla_put_failure:
2276 err = -EMSGSIZE;
2277 err_table_put:
2278 nlmsg_free(skb);
2279 return err;
2280 }
2281
devlink_nl_cmd_dpipe_table_get(struct sk_buff * skb,struct genl_info * info)2282 static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
2283 struct genl_info *info)
2284 {
2285 struct devlink *devlink = info->user_ptr[0];
2286 const char *table_name = NULL;
2287
2288 if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2289 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2290
2291 return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
2292 &devlink->dpipe_table_list,
2293 table_name);
2294 }
2295
devlink_dpipe_value_put(struct sk_buff * skb,struct devlink_dpipe_value * value)2296 static int devlink_dpipe_value_put(struct sk_buff *skb,
2297 struct devlink_dpipe_value *value)
2298 {
2299 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
2300 value->value_size, value->value))
2301 return -EMSGSIZE;
2302 if (value->mask)
2303 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
2304 value->value_size, value->mask))
2305 return -EMSGSIZE;
2306 if (value->mapping_valid)
2307 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
2308 value->mapping_value))
2309 return -EMSGSIZE;
2310 return 0;
2311 }
2312
devlink_dpipe_action_value_put(struct sk_buff * skb,struct devlink_dpipe_value * value)2313 static int devlink_dpipe_action_value_put(struct sk_buff *skb,
2314 struct devlink_dpipe_value *value)
2315 {
2316 if (!value->action)
2317 return -EINVAL;
2318 if (devlink_dpipe_action_put(skb, value->action))
2319 return -EMSGSIZE;
2320 if (devlink_dpipe_value_put(skb, value))
2321 return -EMSGSIZE;
2322 return 0;
2323 }
2324
devlink_dpipe_action_values_put(struct sk_buff * skb,struct devlink_dpipe_value * values,unsigned int values_count)2325 static int devlink_dpipe_action_values_put(struct sk_buff *skb,
2326 struct devlink_dpipe_value *values,
2327 unsigned int values_count)
2328 {
2329 struct nlattr *action_attr;
2330 int i;
2331 int err;
2332
2333 for (i = 0; i < values_count; i++) {
2334 action_attr = nla_nest_start_noflag(skb,
2335 DEVLINK_ATTR_DPIPE_ACTION_VALUE);
2336 if (!action_attr)
2337 return -EMSGSIZE;
2338 err = devlink_dpipe_action_value_put(skb, &values[i]);
2339 if (err)
2340 goto err_action_value_put;
2341 nla_nest_end(skb, action_attr);
2342 }
2343 return 0;
2344
2345 err_action_value_put:
2346 nla_nest_cancel(skb, action_attr);
2347 return err;
2348 }
2349
devlink_dpipe_match_value_put(struct sk_buff * skb,struct devlink_dpipe_value * value)2350 static int devlink_dpipe_match_value_put(struct sk_buff *skb,
2351 struct devlink_dpipe_value *value)
2352 {
2353 if (!value->match)
2354 return -EINVAL;
2355 if (devlink_dpipe_match_put(skb, value->match))
2356 return -EMSGSIZE;
2357 if (devlink_dpipe_value_put(skb, value))
2358 return -EMSGSIZE;
2359 return 0;
2360 }
2361
devlink_dpipe_match_values_put(struct sk_buff * skb,struct devlink_dpipe_value * values,unsigned int values_count)2362 static int devlink_dpipe_match_values_put(struct sk_buff *skb,
2363 struct devlink_dpipe_value *values,
2364 unsigned int values_count)
2365 {
2366 struct nlattr *match_attr;
2367 int i;
2368 int err;
2369
2370 for (i = 0; i < values_count; i++) {
2371 match_attr = nla_nest_start_noflag(skb,
2372 DEVLINK_ATTR_DPIPE_MATCH_VALUE);
2373 if (!match_attr)
2374 return -EMSGSIZE;
2375 err = devlink_dpipe_match_value_put(skb, &values[i]);
2376 if (err)
2377 goto err_match_value_put;
2378 nla_nest_end(skb, match_attr);
2379 }
2380 return 0;
2381
2382 err_match_value_put:
2383 nla_nest_cancel(skb, match_attr);
2384 return err;
2385 }
2386
devlink_dpipe_entry_put(struct sk_buff * skb,struct devlink_dpipe_entry * entry)2387 static int devlink_dpipe_entry_put(struct sk_buff *skb,
2388 struct devlink_dpipe_entry *entry)
2389 {
2390 struct nlattr *entry_attr, *matches_attr, *actions_attr;
2391 int err;
2392
2393 entry_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ENTRY);
2394 if (!entry_attr)
2395 return -EMSGSIZE;
2396
2397 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
2398 DEVLINK_ATTR_PAD))
2399 goto nla_put_failure;
2400 if (entry->counter_valid)
2401 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
2402 entry->counter, DEVLINK_ATTR_PAD))
2403 goto nla_put_failure;
2404
2405 matches_attr = nla_nest_start_noflag(skb,
2406 DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
2407 if (!matches_attr)
2408 goto nla_put_failure;
2409
2410 err = devlink_dpipe_match_values_put(skb, entry->match_values,
2411 entry->match_values_count);
2412 if (err) {
2413 nla_nest_cancel(skb, matches_attr);
2414 goto err_match_values_put;
2415 }
2416 nla_nest_end(skb, matches_attr);
2417
2418 actions_attr = nla_nest_start_noflag(skb,
2419 DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
2420 if (!actions_attr)
2421 goto nla_put_failure;
2422
2423 err = devlink_dpipe_action_values_put(skb, entry->action_values,
2424 entry->action_values_count);
2425 if (err) {
2426 nla_nest_cancel(skb, actions_attr);
2427 goto err_action_values_put;
2428 }
2429 nla_nest_end(skb, actions_attr);
2430
2431 nla_nest_end(skb, entry_attr);
2432 return 0;
2433
2434 nla_put_failure:
2435 err = -EMSGSIZE;
2436 err_match_values_put:
2437 err_action_values_put:
2438 nla_nest_cancel(skb, entry_attr);
2439 return err;
2440 }
2441
2442 static struct devlink_dpipe_table *
devlink_dpipe_table_find(struct list_head * dpipe_tables,const char * table_name,struct devlink * devlink)2443 devlink_dpipe_table_find(struct list_head *dpipe_tables,
2444 const char *table_name, struct devlink *devlink)
2445 {
2446 struct devlink_dpipe_table *table;
2447 list_for_each_entry_rcu(table, dpipe_tables, list,
2448 lockdep_is_held(&devlink->lock)) {
2449 if (!strcmp(table->name, table_name))
2450 return table;
2451 }
2452 return NULL;
2453 }
2454
devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx * dump_ctx)2455 int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
2456 {
2457 struct devlink *devlink;
2458 int err;
2459
2460 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
2461 dump_ctx->info);
2462 if (err)
2463 return err;
2464
2465 dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
2466 dump_ctx->info->snd_portid,
2467 dump_ctx->info->snd_seq,
2468 &devlink_nl_family, NLM_F_MULTI,
2469 dump_ctx->cmd);
2470 if (!dump_ctx->hdr)
2471 goto nla_put_failure;
2472
2473 devlink = dump_ctx->info->user_ptr[0];
2474 if (devlink_nl_put_handle(dump_ctx->skb, devlink))
2475 goto nla_put_failure;
2476 dump_ctx->nest = nla_nest_start_noflag(dump_ctx->skb,
2477 DEVLINK_ATTR_DPIPE_ENTRIES);
2478 if (!dump_ctx->nest)
2479 goto nla_put_failure;
2480 return 0;
2481
2482 nla_put_failure:
2483 nlmsg_free(dump_ctx->skb);
2484 return -EMSGSIZE;
2485 }
2486 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
2487
devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx * dump_ctx,struct devlink_dpipe_entry * entry)2488 int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
2489 struct devlink_dpipe_entry *entry)
2490 {
2491 return devlink_dpipe_entry_put(dump_ctx->skb, entry);
2492 }
2493 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
2494
devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx * dump_ctx)2495 int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
2496 {
2497 nla_nest_end(dump_ctx->skb, dump_ctx->nest);
2498 genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
2499 return 0;
2500 }
2501 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
2502
devlink_dpipe_entry_clear(struct devlink_dpipe_entry * entry)2503 void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
2504
2505 {
2506 unsigned int value_count, value_index;
2507 struct devlink_dpipe_value *value;
2508
2509 value = entry->action_values;
2510 value_count = entry->action_values_count;
2511 for (value_index = 0; value_index < value_count; value_index++) {
2512 kfree(value[value_index].value);
2513 kfree(value[value_index].mask);
2514 }
2515
2516 value = entry->match_values;
2517 value_count = entry->match_values_count;
2518 for (value_index = 0; value_index < value_count; value_index++) {
2519 kfree(value[value_index].value);
2520 kfree(value[value_index].mask);
2521 }
2522 }
2523 EXPORT_SYMBOL(devlink_dpipe_entry_clear);
2524
devlink_dpipe_entries_fill(struct genl_info * info,enum devlink_command cmd,int flags,struct devlink_dpipe_table * table)2525 static int devlink_dpipe_entries_fill(struct genl_info *info,
2526 enum devlink_command cmd, int flags,
2527 struct devlink_dpipe_table *table)
2528 {
2529 struct devlink_dpipe_dump_ctx dump_ctx;
2530 struct nlmsghdr *nlh;
2531 int err;
2532
2533 dump_ctx.skb = NULL;
2534 dump_ctx.cmd = cmd;
2535 dump_ctx.info = info;
2536
2537 err = table->table_ops->entries_dump(table->priv,
2538 table->counters_enabled,
2539 &dump_ctx);
2540 if (err)
2541 return err;
2542
2543 send_done:
2544 nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
2545 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2546 if (!nlh) {
2547 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
2548 if (err)
2549 return err;
2550 goto send_done;
2551 }
2552 return genlmsg_reply(dump_ctx.skb, info);
2553 }
2554
devlink_nl_cmd_dpipe_entries_get(struct sk_buff * skb,struct genl_info * info)2555 static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
2556 struct genl_info *info)
2557 {
2558 struct devlink *devlink = info->user_ptr[0];
2559 struct devlink_dpipe_table *table;
2560 const char *table_name;
2561
2562 if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2563 return -EINVAL;
2564
2565 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2566 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2567 table_name, devlink);
2568 if (!table)
2569 return -EINVAL;
2570
2571 if (!table->table_ops->entries_dump)
2572 return -EINVAL;
2573
2574 return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
2575 0, table);
2576 }
2577
devlink_dpipe_fields_put(struct sk_buff * skb,const struct devlink_dpipe_header * header)2578 static int devlink_dpipe_fields_put(struct sk_buff *skb,
2579 const struct devlink_dpipe_header *header)
2580 {
2581 struct devlink_dpipe_field *field;
2582 struct nlattr *field_attr;
2583 int i;
2584
2585 for (i = 0; i < header->fields_count; i++) {
2586 field = &header->fields[i];
2587 field_attr = nla_nest_start_noflag(skb,
2588 DEVLINK_ATTR_DPIPE_FIELD);
2589 if (!field_attr)
2590 return -EMSGSIZE;
2591 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
2592 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2593 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
2594 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
2595 goto nla_put_failure;
2596 nla_nest_end(skb, field_attr);
2597 }
2598 return 0;
2599
2600 nla_put_failure:
2601 nla_nest_cancel(skb, field_attr);
2602 return -EMSGSIZE;
2603 }
2604
devlink_dpipe_header_put(struct sk_buff * skb,struct devlink_dpipe_header * header)2605 static int devlink_dpipe_header_put(struct sk_buff *skb,
2606 struct devlink_dpipe_header *header)
2607 {
2608 struct nlattr *fields_attr, *header_attr;
2609 int err;
2610
2611 header_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADER);
2612 if (!header_attr)
2613 return -EMSGSIZE;
2614
2615 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
2616 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2617 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2618 goto nla_put_failure;
2619
2620 fields_attr = nla_nest_start_noflag(skb,
2621 DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
2622 if (!fields_attr)
2623 goto nla_put_failure;
2624
2625 err = devlink_dpipe_fields_put(skb, header);
2626 if (err) {
2627 nla_nest_cancel(skb, fields_attr);
2628 goto nla_put_failure;
2629 }
2630 nla_nest_end(skb, fields_attr);
2631 nla_nest_end(skb, header_attr);
2632 return 0;
2633
2634 nla_put_failure:
2635 err = -EMSGSIZE;
2636 nla_nest_cancel(skb, header_attr);
2637 return err;
2638 }
2639
devlink_dpipe_headers_fill(struct genl_info * info,enum devlink_command cmd,int flags,struct devlink_dpipe_headers * dpipe_headers)2640 static int devlink_dpipe_headers_fill(struct genl_info *info,
2641 enum devlink_command cmd, int flags,
2642 struct devlink_dpipe_headers *
2643 dpipe_headers)
2644 {
2645 struct devlink *devlink = info->user_ptr[0];
2646 struct nlattr *headers_attr;
2647 struct sk_buff *skb = NULL;
2648 struct nlmsghdr *nlh;
2649 void *hdr;
2650 int i, j;
2651 int err;
2652
2653 i = 0;
2654 start_again:
2655 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2656 if (err)
2657 return err;
2658
2659 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2660 &devlink_nl_family, NLM_F_MULTI, cmd);
2661 if (!hdr) {
2662 nlmsg_free(skb);
2663 return -EMSGSIZE;
2664 }
2665
2666 if (devlink_nl_put_handle(skb, devlink))
2667 goto nla_put_failure;
2668 headers_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADERS);
2669 if (!headers_attr)
2670 goto nla_put_failure;
2671
2672 j = 0;
2673 for (; i < dpipe_headers->headers_count; i++) {
2674 err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
2675 if (err) {
2676 if (!j)
2677 goto err_table_put;
2678 break;
2679 }
2680 j++;
2681 }
2682 nla_nest_end(skb, headers_attr);
2683 genlmsg_end(skb, hdr);
2684 if (i != dpipe_headers->headers_count)
2685 goto start_again;
2686
2687 send_done:
2688 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2689 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2690 if (!nlh) {
2691 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2692 if (err)
2693 return err;
2694 goto send_done;
2695 }
2696 return genlmsg_reply(skb, info);
2697
2698 nla_put_failure:
2699 err = -EMSGSIZE;
2700 err_table_put:
2701 nlmsg_free(skb);
2702 return err;
2703 }
2704
devlink_nl_cmd_dpipe_headers_get(struct sk_buff * skb,struct genl_info * info)2705 static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
2706 struct genl_info *info)
2707 {
2708 struct devlink *devlink = info->user_ptr[0];
2709
2710 if (!devlink->dpipe_headers)
2711 return -EOPNOTSUPP;
2712 return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
2713 0, devlink->dpipe_headers);
2714 }
2715
devlink_dpipe_table_counters_set(struct devlink * devlink,const char * table_name,bool enable)2716 static int devlink_dpipe_table_counters_set(struct devlink *devlink,
2717 const char *table_name,
2718 bool enable)
2719 {
2720 struct devlink_dpipe_table *table;
2721
2722 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2723 table_name, devlink);
2724 if (!table)
2725 return -EINVAL;
2726
2727 if (table->counter_control_extern)
2728 return -EOPNOTSUPP;
2729
2730 if (!(table->counters_enabled ^ enable))
2731 return 0;
2732
2733 table->counters_enabled = enable;
2734 if (table->table_ops->counters_set_update)
2735 table->table_ops->counters_set_update(table->priv, enable);
2736 return 0;
2737 }
2738
devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff * skb,struct genl_info * info)2739 static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
2740 struct genl_info *info)
2741 {
2742 struct devlink *devlink = info->user_ptr[0];
2743 const char *table_name;
2744 bool counters_enable;
2745
2746 if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
2747 !info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
2748 return -EINVAL;
2749
2750 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2751 counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
2752
2753 return devlink_dpipe_table_counters_set(devlink, table_name,
2754 counters_enable);
2755 }
2756
2757 static struct devlink_resource *
devlink_resource_find(struct devlink * devlink,struct devlink_resource * resource,u64 resource_id)2758 devlink_resource_find(struct devlink *devlink,
2759 struct devlink_resource *resource, u64 resource_id)
2760 {
2761 struct list_head *resource_list;
2762
2763 if (resource)
2764 resource_list = &resource->resource_list;
2765 else
2766 resource_list = &devlink->resource_list;
2767
2768 list_for_each_entry(resource, resource_list, list) {
2769 struct devlink_resource *child_resource;
2770
2771 if (resource->id == resource_id)
2772 return resource;
2773
2774 child_resource = devlink_resource_find(devlink, resource,
2775 resource_id);
2776 if (child_resource)
2777 return child_resource;
2778 }
2779 return NULL;
2780 }
2781
2782 static void
devlink_resource_validate_children(struct devlink_resource * resource)2783 devlink_resource_validate_children(struct devlink_resource *resource)
2784 {
2785 struct devlink_resource *child_resource;
2786 bool size_valid = true;
2787 u64 parts_size = 0;
2788
2789 if (list_empty(&resource->resource_list))
2790 goto out;
2791
2792 list_for_each_entry(child_resource, &resource->resource_list, list)
2793 parts_size += child_resource->size_new;
2794
2795 if (parts_size > resource->size_new)
2796 size_valid = false;
2797 out:
2798 resource->size_valid = size_valid;
2799 }
2800
2801 static int
devlink_resource_validate_size(struct devlink_resource * resource,u64 size,struct netlink_ext_ack * extack)2802 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
2803 struct netlink_ext_ack *extack)
2804 {
2805 u64 reminder;
2806 int err = 0;
2807
2808 if (size > resource->size_params.size_max) {
2809 NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
2810 err = -EINVAL;
2811 }
2812
2813 if (size < resource->size_params.size_min) {
2814 NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
2815 err = -EINVAL;
2816 }
2817
2818 div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
2819 if (reminder) {
2820 NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
2821 err = -EINVAL;
2822 }
2823
2824 return err;
2825 }
2826
devlink_nl_cmd_resource_set(struct sk_buff * skb,struct genl_info * info)2827 static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
2828 struct genl_info *info)
2829 {
2830 struct devlink *devlink = info->user_ptr[0];
2831 struct devlink_resource *resource;
2832 u64 resource_id;
2833 u64 size;
2834 int err;
2835
2836 if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
2837 !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
2838 return -EINVAL;
2839 resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
2840
2841 resource = devlink_resource_find(devlink, NULL, resource_id);
2842 if (!resource)
2843 return -EINVAL;
2844
2845 size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
2846 err = devlink_resource_validate_size(resource, size, info->extack);
2847 if (err)
2848 return err;
2849
2850 resource->size_new = size;
2851 devlink_resource_validate_children(resource);
2852 if (resource->parent)
2853 devlink_resource_validate_children(resource->parent);
2854 return 0;
2855 }
2856
2857 static int
devlink_resource_size_params_put(struct devlink_resource * resource,struct sk_buff * skb)2858 devlink_resource_size_params_put(struct devlink_resource *resource,
2859 struct sk_buff *skb)
2860 {
2861 struct devlink_resource_size_params *size_params;
2862
2863 size_params = &resource->size_params;
2864 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
2865 size_params->size_granularity, DEVLINK_ATTR_PAD) ||
2866 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
2867 size_params->size_max, DEVLINK_ATTR_PAD) ||
2868 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
2869 size_params->size_min, DEVLINK_ATTR_PAD) ||
2870 nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
2871 return -EMSGSIZE;
2872 return 0;
2873 }
2874
devlink_resource_occ_put(struct devlink_resource * resource,struct sk_buff * skb)2875 static int devlink_resource_occ_put(struct devlink_resource *resource,
2876 struct sk_buff *skb)
2877 {
2878 if (!resource->occ_get)
2879 return 0;
2880 return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
2881 resource->occ_get(resource->occ_get_priv),
2882 DEVLINK_ATTR_PAD);
2883 }
2884
devlink_resource_put(struct devlink * devlink,struct sk_buff * skb,struct devlink_resource * resource)2885 static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
2886 struct devlink_resource *resource)
2887 {
2888 struct devlink_resource *child_resource;
2889 struct nlattr *child_resource_attr;
2890 struct nlattr *resource_attr;
2891
2892 resource_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE);
2893 if (!resource_attr)
2894 return -EMSGSIZE;
2895
2896 if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
2897 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
2898 DEVLINK_ATTR_PAD) ||
2899 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
2900 DEVLINK_ATTR_PAD))
2901 goto nla_put_failure;
2902 if (resource->size != resource->size_new)
2903 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
2904 resource->size_new, DEVLINK_ATTR_PAD);
2905 if (devlink_resource_occ_put(resource, skb))
2906 goto nla_put_failure;
2907 if (devlink_resource_size_params_put(resource, skb))
2908 goto nla_put_failure;
2909 if (list_empty(&resource->resource_list))
2910 goto out;
2911
2912 if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
2913 resource->size_valid))
2914 goto nla_put_failure;
2915
2916 child_resource_attr = nla_nest_start_noflag(skb,
2917 DEVLINK_ATTR_RESOURCE_LIST);
2918 if (!child_resource_attr)
2919 goto nla_put_failure;
2920
2921 list_for_each_entry(child_resource, &resource->resource_list, list) {
2922 if (devlink_resource_put(devlink, skb, child_resource))
2923 goto resource_put_failure;
2924 }
2925
2926 nla_nest_end(skb, child_resource_attr);
2927 out:
2928 nla_nest_end(skb, resource_attr);
2929 return 0;
2930
2931 resource_put_failure:
2932 nla_nest_cancel(skb, child_resource_attr);
2933 nla_put_failure:
2934 nla_nest_cancel(skb, resource_attr);
2935 return -EMSGSIZE;
2936 }
2937
devlink_resource_fill(struct genl_info * info,enum devlink_command cmd,int flags)2938 static int devlink_resource_fill(struct genl_info *info,
2939 enum devlink_command cmd, int flags)
2940 {
2941 struct devlink *devlink = info->user_ptr[0];
2942 struct devlink_resource *resource;
2943 struct nlattr *resources_attr;
2944 struct sk_buff *skb = NULL;
2945 struct nlmsghdr *nlh;
2946 bool incomplete;
2947 void *hdr;
2948 int i;
2949 int err;
2950
2951 resource = list_first_entry(&devlink->resource_list,
2952 struct devlink_resource, list);
2953 start_again:
2954 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2955 if (err)
2956 return err;
2957
2958 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2959 &devlink_nl_family, NLM_F_MULTI, cmd);
2960 if (!hdr) {
2961 nlmsg_free(skb);
2962 return -EMSGSIZE;
2963 }
2964
2965 if (devlink_nl_put_handle(skb, devlink))
2966 goto nla_put_failure;
2967
2968 resources_attr = nla_nest_start_noflag(skb,
2969 DEVLINK_ATTR_RESOURCE_LIST);
2970 if (!resources_attr)
2971 goto nla_put_failure;
2972
2973 incomplete = false;
2974 i = 0;
2975 list_for_each_entry_from(resource, &devlink->resource_list, list) {
2976 err = devlink_resource_put(devlink, skb, resource);
2977 if (err) {
2978 if (!i)
2979 goto err_resource_put;
2980 incomplete = true;
2981 break;
2982 }
2983 i++;
2984 }
2985 nla_nest_end(skb, resources_attr);
2986 genlmsg_end(skb, hdr);
2987 if (incomplete)
2988 goto start_again;
2989 send_done:
2990 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2991 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2992 if (!nlh) {
2993 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2994 if (err)
2995 return err;
2996 goto send_done;
2997 }
2998 return genlmsg_reply(skb, info);
2999
3000 nla_put_failure:
3001 err = -EMSGSIZE;
3002 err_resource_put:
3003 nlmsg_free(skb);
3004 return err;
3005 }
3006
devlink_nl_cmd_resource_dump(struct sk_buff * skb,struct genl_info * info)3007 static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
3008 struct genl_info *info)
3009 {
3010 struct devlink *devlink = info->user_ptr[0];
3011
3012 if (list_empty(&devlink->resource_list))
3013 return -EOPNOTSUPP;
3014
3015 return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
3016 }
3017
3018 static int
devlink_resources_validate(struct devlink * devlink,struct devlink_resource * resource,struct genl_info * info)3019 devlink_resources_validate(struct devlink *devlink,
3020 struct devlink_resource *resource,
3021 struct genl_info *info)
3022 {
3023 struct list_head *resource_list;
3024 int err = 0;
3025
3026 if (resource)
3027 resource_list = &resource->resource_list;
3028 else
3029 resource_list = &devlink->resource_list;
3030
3031 list_for_each_entry(resource, resource_list, list) {
3032 if (!resource->size_valid)
3033 return -EINVAL;
3034 err = devlink_resources_validate(devlink, resource, info);
3035 if (err)
3036 return err;
3037 }
3038 return err;
3039 }
3040
devlink_netns_get(struct sk_buff * skb,struct genl_info * info)3041 static struct net *devlink_netns_get(struct sk_buff *skb,
3042 struct genl_info *info)
3043 {
3044 struct nlattr *netns_pid_attr = info->attrs[DEVLINK_ATTR_NETNS_PID];
3045 struct nlattr *netns_fd_attr = info->attrs[DEVLINK_ATTR_NETNS_FD];
3046 struct nlattr *netns_id_attr = info->attrs[DEVLINK_ATTR_NETNS_ID];
3047 struct net *net;
3048
3049 if (!!netns_pid_attr + !!netns_fd_attr + !!netns_id_attr > 1) {
3050 NL_SET_ERR_MSG_MOD(info->extack, "multiple netns identifying attributes specified");
3051 return ERR_PTR(-EINVAL);
3052 }
3053
3054 if (netns_pid_attr) {
3055 net = get_net_ns_by_pid(nla_get_u32(netns_pid_attr));
3056 } else if (netns_fd_attr) {
3057 net = get_net_ns_by_fd(nla_get_u32(netns_fd_attr));
3058 } else if (netns_id_attr) {
3059 net = get_net_ns_by_id(sock_net(skb->sk),
3060 nla_get_u32(netns_id_attr));
3061 if (!net)
3062 net = ERR_PTR(-EINVAL);
3063 } else {
3064 WARN_ON(1);
3065 net = ERR_PTR(-EINVAL);
3066 }
3067 if (IS_ERR(net)) {
3068 NL_SET_ERR_MSG_MOD(info->extack, "Unknown network namespace");
3069 return ERR_PTR(-EINVAL);
3070 }
3071 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
3072 put_net(net);
3073 return ERR_PTR(-EPERM);
3074 }
3075 return net;
3076 }
3077
3078 static void devlink_param_notify(struct devlink *devlink,
3079 unsigned int port_index,
3080 struct devlink_param_item *param_item,
3081 enum devlink_command cmd);
3082
devlink_reload_netns_change(struct devlink * devlink,struct net * dest_net)3083 static void devlink_reload_netns_change(struct devlink *devlink,
3084 struct net *dest_net)
3085 {
3086 struct devlink_param_item *param_item;
3087
3088 /* Userspace needs to be notified about devlink objects
3089 * removed from original and entering new network namespace.
3090 * The rest of the devlink objects are re-created during
3091 * reload process so the notifications are generated separatelly.
3092 */
3093
3094 list_for_each_entry(param_item, &devlink->param_list, list)
3095 devlink_param_notify(devlink, 0, param_item,
3096 DEVLINK_CMD_PARAM_DEL);
3097 devlink_notify(devlink, DEVLINK_CMD_DEL);
3098
3099 __devlink_net_set(devlink, dest_net);
3100
3101 devlink_notify(devlink, DEVLINK_CMD_NEW);
3102 list_for_each_entry(param_item, &devlink->param_list, list)
3103 devlink_param_notify(devlink, 0, param_item,
3104 DEVLINK_CMD_PARAM_NEW);
3105 }
3106
devlink_reload_supported(const struct devlink_ops * ops)3107 static bool devlink_reload_supported(const struct devlink_ops *ops)
3108 {
3109 return ops->reload_down && ops->reload_up;
3110 }
3111
devlink_reload_failed_set(struct devlink * devlink,bool reload_failed)3112 static void devlink_reload_failed_set(struct devlink *devlink,
3113 bool reload_failed)
3114 {
3115 if (devlink->reload_failed == reload_failed)
3116 return;
3117 devlink->reload_failed = reload_failed;
3118 devlink_notify(devlink, DEVLINK_CMD_NEW);
3119 }
3120
devlink_is_reload_failed(const struct devlink * devlink)3121 bool devlink_is_reload_failed(const struct devlink *devlink)
3122 {
3123 return devlink->reload_failed;
3124 }
3125 EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
3126
3127 static void
__devlink_reload_stats_update(struct devlink * devlink,u32 * reload_stats,enum devlink_reload_limit limit,u32 actions_performed)3128 __devlink_reload_stats_update(struct devlink *devlink, u32 *reload_stats,
3129 enum devlink_reload_limit limit, u32 actions_performed)
3130 {
3131 unsigned long actions = actions_performed;
3132 int stat_idx;
3133 int action;
3134
3135 for_each_set_bit(action, &actions, __DEVLINK_RELOAD_ACTION_MAX) {
3136 stat_idx = limit * __DEVLINK_RELOAD_ACTION_MAX + action;
3137 reload_stats[stat_idx]++;
3138 }
3139 devlink_notify(devlink, DEVLINK_CMD_NEW);
3140 }
3141
3142 static void
devlink_reload_stats_update(struct devlink * devlink,enum devlink_reload_limit limit,u32 actions_performed)3143 devlink_reload_stats_update(struct devlink *devlink, enum devlink_reload_limit limit,
3144 u32 actions_performed)
3145 {
3146 __devlink_reload_stats_update(devlink, devlink->stats.reload_stats, limit,
3147 actions_performed);
3148 }
3149
3150 /**
3151 * devlink_remote_reload_actions_performed - Update devlink on reload actions
3152 * performed which are not a direct result of devlink reload call.
3153 *
3154 * This should be called by a driver after performing reload actions in case it was not
3155 * a result of devlink reload call. For example fw_activate was performed as a result
3156 * of devlink reload triggered fw_activate on another host.
3157 * The motivation for this function is to keep data on reload actions performed on this
3158 * function whether it was done due to direct devlink reload call or not.
3159 *
3160 * @devlink: devlink
3161 * @limit: reload limit
3162 * @actions_performed: bitmask of actions performed
3163 */
devlink_remote_reload_actions_performed(struct devlink * devlink,enum devlink_reload_limit limit,u32 actions_performed)3164 void devlink_remote_reload_actions_performed(struct devlink *devlink,
3165 enum devlink_reload_limit limit,
3166 u32 actions_performed)
3167 {
3168 if (WARN_ON(!actions_performed ||
3169 actions_performed & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) ||
3170 actions_performed >= BIT(__DEVLINK_RELOAD_ACTION_MAX) ||
3171 limit > DEVLINK_RELOAD_LIMIT_MAX))
3172 return;
3173
3174 __devlink_reload_stats_update(devlink, devlink->stats.remote_reload_stats, limit,
3175 actions_performed);
3176 }
3177 EXPORT_SYMBOL_GPL(devlink_remote_reload_actions_performed);
3178
devlink_reload(struct devlink * devlink,struct net * dest_net,enum devlink_reload_action action,enum devlink_reload_limit limit,u32 * actions_performed,struct netlink_ext_ack * extack)3179 static int devlink_reload(struct devlink *devlink, struct net *dest_net,
3180 enum devlink_reload_action action, enum devlink_reload_limit limit,
3181 u32 *actions_performed, struct netlink_ext_ack *extack)
3182 {
3183 u32 remote_reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE];
3184 int err;
3185
3186 if (!devlink->reload_enabled)
3187 return -EOPNOTSUPP;
3188
3189 memcpy(remote_reload_stats, devlink->stats.remote_reload_stats,
3190 sizeof(remote_reload_stats));
3191 err = devlink->ops->reload_down(devlink, !!dest_net, action, limit, extack);
3192 if (err)
3193 return err;
3194
3195 if (dest_net && !net_eq(dest_net, devlink_net(devlink)))
3196 devlink_reload_netns_change(devlink, dest_net);
3197
3198 err = devlink->ops->reload_up(devlink, action, limit, actions_performed, extack);
3199 devlink_reload_failed_set(devlink, !!err);
3200 if (err)
3201 return err;
3202
3203 WARN_ON(!(*actions_performed & BIT(action)));
3204 /* Catch driver on updating the remote action within devlink reload */
3205 WARN_ON(memcmp(remote_reload_stats, devlink->stats.remote_reload_stats,
3206 sizeof(remote_reload_stats)));
3207 devlink_reload_stats_update(devlink, limit, *actions_performed);
3208 return 0;
3209 }
3210
3211 static int
devlink_nl_reload_actions_performed_snd(struct devlink * devlink,u32 actions_performed,enum devlink_command cmd,struct genl_info * info)3212 devlink_nl_reload_actions_performed_snd(struct devlink *devlink, u32 actions_performed,
3213 enum devlink_command cmd, struct genl_info *info)
3214 {
3215 struct sk_buff *msg;
3216 void *hdr;
3217
3218 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3219 if (!msg)
3220 return -ENOMEM;
3221
3222 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, &devlink_nl_family, 0, cmd);
3223 if (!hdr)
3224 goto free_msg;
3225
3226 if (devlink_nl_put_handle(msg, devlink))
3227 goto nla_put_failure;
3228
3229 if (nla_put_bitfield32(msg, DEVLINK_ATTR_RELOAD_ACTIONS_PERFORMED, actions_performed,
3230 actions_performed))
3231 goto nla_put_failure;
3232 genlmsg_end(msg, hdr);
3233
3234 return genlmsg_reply(msg, info);
3235
3236 nla_put_failure:
3237 genlmsg_cancel(msg, hdr);
3238 free_msg:
3239 nlmsg_free(msg);
3240 return -EMSGSIZE;
3241 }
3242
devlink_nl_cmd_reload(struct sk_buff * skb,struct genl_info * info)3243 static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
3244 {
3245 struct devlink *devlink = info->user_ptr[0];
3246 enum devlink_reload_action action;
3247 enum devlink_reload_limit limit;
3248 struct net *dest_net = NULL;
3249 u32 actions_performed;
3250 int err;
3251
3252 if (!devlink_reload_supported(devlink->ops))
3253 return -EOPNOTSUPP;
3254
3255 err = devlink_resources_validate(devlink, NULL, info);
3256 if (err) {
3257 NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
3258 return err;
3259 }
3260
3261 if (info->attrs[DEVLINK_ATTR_NETNS_PID] ||
3262 info->attrs[DEVLINK_ATTR_NETNS_FD] ||
3263 info->attrs[DEVLINK_ATTR_NETNS_ID]) {
3264 dest_net = devlink_netns_get(skb, info);
3265 if (IS_ERR(dest_net))
3266 return PTR_ERR(dest_net);
3267 }
3268
3269 if (info->attrs[DEVLINK_ATTR_RELOAD_ACTION])
3270 action = nla_get_u8(info->attrs[DEVLINK_ATTR_RELOAD_ACTION]);
3271 else
3272 action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT;
3273
3274 if (!devlink_reload_action_is_supported(devlink, action)) {
3275 NL_SET_ERR_MSG_MOD(info->extack,
3276 "Requested reload action is not supported by the driver");
3277 return -EOPNOTSUPP;
3278 }
3279
3280 limit = DEVLINK_RELOAD_LIMIT_UNSPEC;
3281 if (info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]) {
3282 struct nla_bitfield32 limits;
3283 u32 limits_selected;
3284
3285 limits = nla_get_bitfield32(info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]);
3286 limits_selected = limits.value & limits.selector;
3287 if (!limits_selected) {
3288 NL_SET_ERR_MSG_MOD(info->extack, "Invalid limit selected");
3289 return -EINVAL;
3290 }
3291 for (limit = 0 ; limit <= DEVLINK_RELOAD_LIMIT_MAX ; limit++)
3292 if (limits_selected & BIT(limit))
3293 break;
3294 /* UAPI enables multiselection, but currently it is not used */
3295 if (limits_selected != BIT(limit)) {
3296 NL_SET_ERR_MSG_MOD(info->extack,
3297 "Multiselection of limit is not supported");
3298 return -EOPNOTSUPP;
3299 }
3300 if (!devlink_reload_limit_is_supported(devlink, limit)) {
3301 NL_SET_ERR_MSG_MOD(info->extack,
3302 "Requested limit is not supported by the driver");
3303 return -EOPNOTSUPP;
3304 }
3305 if (devlink_reload_combination_is_invalid(action, limit)) {
3306 NL_SET_ERR_MSG_MOD(info->extack,
3307 "Requested limit is invalid for this action");
3308 return -EINVAL;
3309 }
3310 }
3311 err = devlink_reload(devlink, dest_net, action, limit, &actions_performed, info->extack);
3312
3313 if (dest_net)
3314 put_net(dest_net);
3315
3316 if (err)
3317 return err;
3318 /* For backward compatibility generate reply only if attributes used by user */
3319 if (!info->attrs[DEVLINK_ATTR_RELOAD_ACTION] && !info->attrs[DEVLINK_ATTR_RELOAD_LIMITS])
3320 return 0;
3321
3322 return devlink_nl_reload_actions_performed_snd(devlink, actions_performed,
3323 DEVLINK_CMD_RELOAD, info);
3324 }
3325
devlink_nl_flash_update_fill(struct sk_buff * msg,struct devlink * devlink,enum devlink_command cmd,struct devlink_flash_notify * params)3326 static int devlink_nl_flash_update_fill(struct sk_buff *msg,
3327 struct devlink *devlink,
3328 enum devlink_command cmd,
3329 struct devlink_flash_notify *params)
3330 {
3331 void *hdr;
3332
3333 hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3334 if (!hdr)
3335 return -EMSGSIZE;
3336
3337 if (devlink_nl_put_handle(msg, devlink))
3338 goto nla_put_failure;
3339
3340 if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS)
3341 goto out;
3342
3343 if (params->status_msg &&
3344 nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG,
3345 params->status_msg))
3346 goto nla_put_failure;
3347 if (params->component &&
3348 nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT,
3349 params->component))
3350 goto nla_put_failure;
3351 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
3352 params->done, DEVLINK_ATTR_PAD))
3353 goto nla_put_failure;
3354 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
3355 params->total, DEVLINK_ATTR_PAD))
3356 goto nla_put_failure;
3357 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TIMEOUT,
3358 params->timeout, DEVLINK_ATTR_PAD))
3359 goto nla_put_failure;
3360
3361 out:
3362 genlmsg_end(msg, hdr);
3363 return 0;
3364
3365 nla_put_failure:
3366 genlmsg_cancel(msg, hdr);
3367 return -EMSGSIZE;
3368 }
3369
__devlink_flash_update_notify(struct devlink * devlink,enum devlink_command cmd,struct devlink_flash_notify * params)3370 static void __devlink_flash_update_notify(struct devlink *devlink,
3371 enum devlink_command cmd,
3372 struct devlink_flash_notify *params)
3373 {
3374 struct sk_buff *msg;
3375 int err;
3376
3377 WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE &&
3378 cmd != DEVLINK_CMD_FLASH_UPDATE_END &&
3379 cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS);
3380
3381 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3382 if (!msg)
3383 return;
3384
3385 err = devlink_nl_flash_update_fill(msg, devlink, cmd, params);
3386 if (err)
3387 goto out_free_msg;
3388
3389 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3390 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3391 return;
3392
3393 out_free_msg:
3394 nlmsg_free(msg);
3395 }
3396
devlink_flash_update_begin_notify(struct devlink * devlink)3397 void devlink_flash_update_begin_notify(struct devlink *devlink)
3398 {
3399 struct devlink_flash_notify params = { 0 };
3400
3401 __devlink_flash_update_notify(devlink,
3402 DEVLINK_CMD_FLASH_UPDATE,
3403 ¶ms);
3404 }
3405 EXPORT_SYMBOL_GPL(devlink_flash_update_begin_notify);
3406
devlink_flash_update_end_notify(struct devlink * devlink)3407 void devlink_flash_update_end_notify(struct devlink *devlink)
3408 {
3409 struct devlink_flash_notify params = { 0 };
3410
3411 __devlink_flash_update_notify(devlink,
3412 DEVLINK_CMD_FLASH_UPDATE_END,
3413 ¶ms);
3414 }
3415 EXPORT_SYMBOL_GPL(devlink_flash_update_end_notify);
3416
devlink_flash_update_status_notify(struct devlink * devlink,const char * status_msg,const char * component,unsigned long done,unsigned long total)3417 void devlink_flash_update_status_notify(struct devlink *devlink,
3418 const char *status_msg,
3419 const char *component,
3420 unsigned long done,
3421 unsigned long total)
3422 {
3423 struct devlink_flash_notify params = {
3424 .status_msg = status_msg,
3425 .component = component,
3426 .done = done,
3427 .total = total,
3428 };
3429
3430 __devlink_flash_update_notify(devlink,
3431 DEVLINK_CMD_FLASH_UPDATE_STATUS,
3432 ¶ms);
3433 }
3434 EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify);
3435
devlink_flash_update_timeout_notify(struct devlink * devlink,const char * status_msg,const char * component,unsigned long timeout)3436 void devlink_flash_update_timeout_notify(struct devlink *devlink,
3437 const char *status_msg,
3438 const char *component,
3439 unsigned long timeout)
3440 {
3441 struct devlink_flash_notify params = {
3442 .status_msg = status_msg,
3443 .component = component,
3444 .timeout = timeout,
3445 };
3446
3447 __devlink_flash_update_notify(devlink,
3448 DEVLINK_CMD_FLASH_UPDATE_STATUS,
3449 ¶ms);
3450 }
3451 EXPORT_SYMBOL_GPL(devlink_flash_update_timeout_notify);
3452
devlink_nl_cmd_flash_update(struct sk_buff * skb,struct genl_info * info)3453 static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
3454 struct genl_info *info)
3455 {
3456 struct nlattr *nla_component, *nla_overwrite_mask;
3457 struct devlink_flash_update_params params = {};
3458 struct devlink *devlink = info->user_ptr[0];
3459 u32 supported_params;
3460
3461 if (!devlink->ops->flash_update)
3462 return -EOPNOTSUPP;
3463
3464 if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME])
3465 return -EINVAL;
3466
3467 supported_params = devlink->ops->supported_flash_update_params;
3468
3469 params.file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
3470
3471 nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
3472 if (nla_component) {
3473 if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT)) {
3474 NL_SET_ERR_MSG_ATTR(info->extack, nla_component,
3475 "component update is not supported by this device");
3476 return -EOPNOTSUPP;
3477 }
3478 params.component = nla_data(nla_component);
3479 }
3480
3481 nla_overwrite_mask = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK];
3482 if (nla_overwrite_mask) {
3483 struct nla_bitfield32 sections;
3484
3485 if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK)) {
3486 NL_SET_ERR_MSG_ATTR(info->extack, nla_overwrite_mask,
3487 "overwrite settings are not supported by this device");
3488 return -EOPNOTSUPP;
3489 }
3490 sections = nla_get_bitfield32(nla_overwrite_mask);
3491 params.overwrite_mask = sections.value & sections.selector;
3492 }
3493
3494 return devlink->ops->flash_update(devlink, ¶ms, info->extack);
3495 }
3496
3497 static const struct devlink_param devlink_param_generic[] = {
3498 {
3499 .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
3500 .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
3501 .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
3502 },
3503 {
3504 .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
3505 .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
3506 .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
3507 },
3508 {
3509 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
3510 .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
3511 .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
3512 },
3513 {
3514 .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
3515 .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
3516 .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
3517 },
3518 {
3519 .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
3520 .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
3521 .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
3522 },
3523 {
3524 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
3525 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
3526 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
3527 },
3528 {
3529 .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
3530 .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
3531 .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
3532 },
3533 {
3534 .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
3535 .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
3536 .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
3537 },
3538 {
3539 .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
3540 .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME,
3541 .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE,
3542 },
3543 {
3544 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE,
3545 .name = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME,
3546 .type = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE,
3547 },
3548 {
3549 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_REMOTE_DEV_RESET,
3550 .name = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_NAME,
3551 .type = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_TYPE,
3552 },
3553 };
3554
devlink_param_generic_verify(const struct devlink_param * param)3555 static int devlink_param_generic_verify(const struct devlink_param *param)
3556 {
3557 /* verify it match generic parameter by id and name */
3558 if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
3559 return -EINVAL;
3560 if (strcmp(param->name, devlink_param_generic[param->id].name))
3561 return -ENOENT;
3562
3563 WARN_ON(param->type != devlink_param_generic[param->id].type);
3564
3565 return 0;
3566 }
3567
devlink_param_driver_verify(const struct devlink_param * param)3568 static int devlink_param_driver_verify(const struct devlink_param *param)
3569 {
3570 int i;
3571
3572 if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
3573 return -EINVAL;
3574 /* verify no such name in generic params */
3575 for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
3576 if (!strcmp(param->name, devlink_param_generic[i].name))
3577 return -EEXIST;
3578
3579 return 0;
3580 }
3581
3582 static struct devlink_param_item *
devlink_param_find_by_name(struct list_head * param_list,const char * param_name)3583 devlink_param_find_by_name(struct list_head *param_list,
3584 const char *param_name)
3585 {
3586 struct devlink_param_item *param_item;
3587
3588 list_for_each_entry(param_item, param_list, list)
3589 if (!strcmp(param_item->param->name, param_name))
3590 return param_item;
3591 return NULL;
3592 }
3593
3594 static struct devlink_param_item *
devlink_param_find_by_id(struct list_head * param_list,u32 param_id)3595 devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
3596 {
3597 struct devlink_param_item *param_item;
3598
3599 list_for_each_entry(param_item, param_list, list)
3600 if (param_item->param->id == param_id)
3601 return param_item;
3602 return NULL;
3603 }
3604
3605 static bool
devlink_param_cmode_is_supported(const struct devlink_param * param,enum devlink_param_cmode cmode)3606 devlink_param_cmode_is_supported(const struct devlink_param *param,
3607 enum devlink_param_cmode cmode)
3608 {
3609 return test_bit(cmode, ¶m->supported_cmodes);
3610 }
3611
devlink_param_get(struct devlink * devlink,const struct devlink_param * param,struct devlink_param_gset_ctx * ctx)3612 static int devlink_param_get(struct devlink *devlink,
3613 const struct devlink_param *param,
3614 struct devlink_param_gset_ctx *ctx)
3615 {
3616 if (!param->get)
3617 return -EOPNOTSUPP;
3618 return param->get(devlink, param->id, ctx);
3619 }
3620
devlink_param_set(struct devlink * devlink,const struct devlink_param * param,struct devlink_param_gset_ctx * ctx)3621 static int devlink_param_set(struct devlink *devlink,
3622 const struct devlink_param *param,
3623 struct devlink_param_gset_ctx *ctx)
3624 {
3625 if (!param->set)
3626 return -EOPNOTSUPP;
3627 return param->set(devlink, param->id, ctx);
3628 }
3629
3630 static int
devlink_param_type_to_nla_type(enum devlink_param_type param_type)3631 devlink_param_type_to_nla_type(enum devlink_param_type param_type)
3632 {
3633 switch (param_type) {
3634 case DEVLINK_PARAM_TYPE_U8:
3635 return NLA_U8;
3636 case DEVLINK_PARAM_TYPE_U16:
3637 return NLA_U16;
3638 case DEVLINK_PARAM_TYPE_U32:
3639 return NLA_U32;
3640 case DEVLINK_PARAM_TYPE_STRING:
3641 return NLA_STRING;
3642 case DEVLINK_PARAM_TYPE_BOOL:
3643 return NLA_FLAG;
3644 default:
3645 return -EINVAL;
3646 }
3647 }
3648
3649 static int
devlink_nl_param_value_fill_one(struct sk_buff * msg,enum devlink_param_type type,enum devlink_param_cmode cmode,union devlink_param_value val)3650 devlink_nl_param_value_fill_one(struct sk_buff *msg,
3651 enum devlink_param_type type,
3652 enum devlink_param_cmode cmode,
3653 union devlink_param_value val)
3654 {
3655 struct nlattr *param_value_attr;
3656
3657 param_value_attr = nla_nest_start_noflag(msg,
3658 DEVLINK_ATTR_PARAM_VALUE);
3659 if (!param_value_attr)
3660 goto nla_put_failure;
3661
3662 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
3663 goto value_nest_cancel;
3664
3665 switch (type) {
3666 case DEVLINK_PARAM_TYPE_U8:
3667 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
3668 goto value_nest_cancel;
3669 break;
3670 case DEVLINK_PARAM_TYPE_U16:
3671 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
3672 goto value_nest_cancel;
3673 break;
3674 case DEVLINK_PARAM_TYPE_U32:
3675 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
3676 goto value_nest_cancel;
3677 break;
3678 case DEVLINK_PARAM_TYPE_STRING:
3679 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
3680 val.vstr))
3681 goto value_nest_cancel;
3682 break;
3683 case DEVLINK_PARAM_TYPE_BOOL:
3684 if (val.vbool &&
3685 nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
3686 goto value_nest_cancel;
3687 break;
3688 }
3689
3690 nla_nest_end(msg, param_value_attr);
3691 return 0;
3692
3693 value_nest_cancel:
3694 nla_nest_cancel(msg, param_value_attr);
3695 nla_put_failure:
3696 return -EMSGSIZE;
3697 }
3698
devlink_nl_param_fill(struct sk_buff * msg,struct devlink * devlink,unsigned int port_index,struct devlink_param_item * param_item,enum devlink_command cmd,u32 portid,u32 seq,int flags)3699 static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
3700 unsigned int port_index,
3701 struct devlink_param_item *param_item,
3702 enum devlink_command cmd,
3703 u32 portid, u32 seq, int flags)
3704 {
3705 union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
3706 bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
3707 const struct devlink_param *param = param_item->param;
3708 struct devlink_param_gset_ctx ctx;
3709 struct nlattr *param_values_list;
3710 struct nlattr *param_attr;
3711 int nla_type;
3712 void *hdr;
3713 int err;
3714 int i;
3715
3716 /* Get value from driver part to driverinit configuration mode */
3717 for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3718 if (!devlink_param_cmode_is_supported(param, i))
3719 continue;
3720 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3721 if (!param_item->driverinit_value_valid)
3722 return -EOPNOTSUPP;
3723 param_value[i] = param_item->driverinit_value;
3724 } else {
3725 if (!param_item->published)
3726 continue;
3727 ctx.cmode = i;
3728 err = devlink_param_get(devlink, param, &ctx);
3729 if (err)
3730 return err;
3731 param_value[i] = ctx.val;
3732 }
3733 param_value_set[i] = true;
3734 }
3735
3736 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3737 if (!hdr)
3738 return -EMSGSIZE;
3739
3740 if (devlink_nl_put_handle(msg, devlink))
3741 goto genlmsg_cancel;
3742
3743 if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
3744 cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
3745 cmd == DEVLINK_CMD_PORT_PARAM_DEL)
3746 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
3747 goto genlmsg_cancel;
3748
3749 param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM);
3750 if (!param_attr)
3751 goto genlmsg_cancel;
3752 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
3753 goto param_nest_cancel;
3754 if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
3755 goto param_nest_cancel;
3756
3757 nla_type = devlink_param_type_to_nla_type(param->type);
3758 if (nla_type < 0)
3759 goto param_nest_cancel;
3760 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
3761 goto param_nest_cancel;
3762
3763 param_values_list = nla_nest_start_noflag(msg,
3764 DEVLINK_ATTR_PARAM_VALUES_LIST);
3765 if (!param_values_list)
3766 goto param_nest_cancel;
3767
3768 for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
3769 if (!param_value_set[i])
3770 continue;
3771 err = devlink_nl_param_value_fill_one(msg, param->type,
3772 i, param_value[i]);
3773 if (err)
3774 goto values_list_nest_cancel;
3775 }
3776
3777 nla_nest_end(msg, param_values_list);
3778 nla_nest_end(msg, param_attr);
3779 genlmsg_end(msg, hdr);
3780 return 0;
3781
3782 values_list_nest_cancel:
3783 nla_nest_end(msg, param_values_list);
3784 param_nest_cancel:
3785 nla_nest_cancel(msg, param_attr);
3786 genlmsg_cancel:
3787 genlmsg_cancel(msg, hdr);
3788 return -EMSGSIZE;
3789 }
3790
devlink_param_notify(struct devlink * devlink,unsigned int port_index,struct devlink_param_item * param_item,enum devlink_command cmd)3791 static void devlink_param_notify(struct devlink *devlink,
3792 unsigned int port_index,
3793 struct devlink_param_item *param_item,
3794 enum devlink_command cmd)
3795 {
3796 struct sk_buff *msg;
3797 int err;
3798
3799 WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
3800 cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
3801 cmd != DEVLINK_CMD_PORT_PARAM_DEL);
3802
3803 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3804 if (!msg)
3805 return;
3806 err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
3807 0, 0, 0);
3808 if (err) {
3809 nlmsg_free(msg);
3810 return;
3811 }
3812
3813 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3814 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3815 }
3816
devlink_nl_cmd_param_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)3817 static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
3818 struct netlink_callback *cb)
3819 {
3820 struct devlink_param_item *param_item;
3821 struct devlink *devlink;
3822 int start = cb->args[0];
3823 int idx = 0;
3824 int err = 0;
3825
3826 mutex_lock(&devlink_mutex);
3827 list_for_each_entry(devlink, &devlink_list, list) {
3828 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3829 continue;
3830 mutex_lock(&devlink->lock);
3831 list_for_each_entry(param_item, &devlink->param_list, list) {
3832 if (idx < start) {
3833 idx++;
3834 continue;
3835 }
3836 err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3837 DEVLINK_CMD_PARAM_GET,
3838 NETLINK_CB(cb->skb).portid,
3839 cb->nlh->nlmsg_seq,
3840 NLM_F_MULTI);
3841 if (err == -EOPNOTSUPP) {
3842 err = 0;
3843 } else if (err) {
3844 mutex_unlock(&devlink->lock);
3845 goto out;
3846 }
3847 idx++;
3848 }
3849 mutex_unlock(&devlink->lock);
3850 }
3851 out:
3852 mutex_unlock(&devlink_mutex);
3853
3854 if (err != -EMSGSIZE)
3855 return err;
3856
3857 cb->args[0] = idx;
3858 return msg->len;
3859 }
3860
3861 static int
devlink_param_type_get_from_info(struct genl_info * info,enum devlink_param_type * param_type)3862 devlink_param_type_get_from_info(struct genl_info *info,
3863 enum devlink_param_type *param_type)
3864 {
3865 if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
3866 return -EINVAL;
3867
3868 switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
3869 case NLA_U8:
3870 *param_type = DEVLINK_PARAM_TYPE_U8;
3871 break;
3872 case NLA_U16:
3873 *param_type = DEVLINK_PARAM_TYPE_U16;
3874 break;
3875 case NLA_U32:
3876 *param_type = DEVLINK_PARAM_TYPE_U32;
3877 break;
3878 case NLA_STRING:
3879 *param_type = DEVLINK_PARAM_TYPE_STRING;
3880 break;
3881 case NLA_FLAG:
3882 *param_type = DEVLINK_PARAM_TYPE_BOOL;
3883 break;
3884 default:
3885 return -EINVAL;
3886 }
3887
3888 return 0;
3889 }
3890
3891 static int
devlink_param_value_get_from_info(const struct devlink_param * param,struct genl_info * info,union devlink_param_value * value)3892 devlink_param_value_get_from_info(const struct devlink_param *param,
3893 struct genl_info *info,
3894 union devlink_param_value *value)
3895 {
3896 struct nlattr *param_data;
3897 int len;
3898
3899 param_data = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA];
3900
3901 if (param->type != DEVLINK_PARAM_TYPE_BOOL && !param_data)
3902 return -EINVAL;
3903
3904 switch (param->type) {
3905 case DEVLINK_PARAM_TYPE_U8:
3906 if (nla_len(param_data) != sizeof(u8))
3907 return -EINVAL;
3908 value->vu8 = nla_get_u8(param_data);
3909 break;
3910 case DEVLINK_PARAM_TYPE_U16:
3911 if (nla_len(param_data) != sizeof(u16))
3912 return -EINVAL;
3913 value->vu16 = nla_get_u16(param_data);
3914 break;
3915 case DEVLINK_PARAM_TYPE_U32:
3916 if (nla_len(param_data) != sizeof(u32))
3917 return -EINVAL;
3918 value->vu32 = nla_get_u32(param_data);
3919 break;
3920 case DEVLINK_PARAM_TYPE_STRING:
3921 len = strnlen(nla_data(param_data), nla_len(param_data));
3922 if (len == nla_len(param_data) ||
3923 len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
3924 return -EINVAL;
3925 strcpy(value->vstr, nla_data(param_data));
3926 break;
3927 case DEVLINK_PARAM_TYPE_BOOL:
3928 if (param_data && nla_len(param_data))
3929 return -EINVAL;
3930 value->vbool = nla_get_flag(param_data);
3931 break;
3932 }
3933 return 0;
3934 }
3935
3936 static struct devlink_param_item *
devlink_param_get_from_info(struct list_head * param_list,struct genl_info * info)3937 devlink_param_get_from_info(struct list_head *param_list,
3938 struct genl_info *info)
3939 {
3940 char *param_name;
3941
3942 if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3943 return NULL;
3944
3945 param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
3946 return devlink_param_find_by_name(param_list, param_name);
3947 }
3948
devlink_nl_cmd_param_get_doit(struct sk_buff * skb,struct genl_info * info)3949 static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3950 struct genl_info *info)
3951 {
3952 struct devlink *devlink = info->user_ptr[0];
3953 struct devlink_param_item *param_item;
3954 struct sk_buff *msg;
3955 int err;
3956
3957 param_item = devlink_param_get_from_info(&devlink->param_list, info);
3958 if (!param_item)
3959 return -EINVAL;
3960
3961 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3962 if (!msg)
3963 return -ENOMEM;
3964
3965 err = devlink_nl_param_fill(msg, devlink, 0, param_item,
3966 DEVLINK_CMD_PARAM_GET,
3967 info->snd_portid, info->snd_seq, 0);
3968 if (err) {
3969 nlmsg_free(msg);
3970 return err;
3971 }
3972
3973 return genlmsg_reply(msg, info);
3974 }
3975
__devlink_nl_cmd_param_set_doit(struct devlink * devlink,unsigned int port_index,struct list_head * param_list,struct genl_info * info,enum devlink_command cmd)3976 static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
3977 unsigned int port_index,
3978 struct list_head *param_list,
3979 struct genl_info *info,
3980 enum devlink_command cmd)
3981 {
3982 enum devlink_param_type param_type;
3983 struct devlink_param_gset_ctx ctx;
3984 enum devlink_param_cmode cmode;
3985 struct devlink_param_item *param_item;
3986 const struct devlink_param *param;
3987 union devlink_param_value value;
3988 int err = 0;
3989
3990 param_item = devlink_param_get_from_info(param_list, info);
3991 if (!param_item)
3992 return -EINVAL;
3993 param = param_item->param;
3994 err = devlink_param_type_get_from_info(info, ¶m_type);
3995 if (err)
3996 return err;
3997 if (param_type != param->type)
3998 return -EINVAL;
3999 err = devlink_param_value_get_from_info(param, info, &value);
4000 if (err)
4001 return err;
4002 if (param->validate) {
4003 err = param->validate(devlink, param->id, value, info->extack);
4004 if (err)
4005 return err;
4006 }
4007
4008 if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
4009 return -EINVAL;
4010 cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
4011 if (!devlink_param_cmode_is_supported(param, cmode))
4012 return -EOPNOTSUPP;
4013
4014 if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
4015 if (param->type == DEVLINK_PARAM_TYPE_STRING)
4016 strcpy(param_item->driverinit_value.vstr, value.vstr);
4017 else
4018 param_item->driverinit_value = value;
4019 param_item->driverinit_value_valid = true;
4020 } else {
4021 if (!param->set)
4022 return -EOPNOTSUPP;
4023 ctx.val = value;
4024 ctx.cmode = cmode;
4025 err = devlink_param_set(devlink, param, &ctx);
4026 if (err)
4027 return err;
4028 }
4029
4030 devlink_param_notify(devlink, port_index, param_item, cmd);
4031 return 0;
4032 }
4033
devlink_nl_cmd_param_set_doit(struct sk_buff * skb,struct genl_info * info)4034 static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
4035 struct genl_info *info)
4036 {
4037 struct devlink *devlink = info->user_ptr[0];
4038
4039 return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
4040 info, DEVLINK_CMD_PARAM_NEW);
4041 }
4042
devlink_param_register_one(struct devlink * devlink,unsigned int port_index,struct list_head * param_list,const struct devlink_param * param,enum devlink_command cmd)4043 static int devlink_param_register_one(struct devlink *devlink,
4044 unsigned int port_index,
4045 struct list_head *param_list,
4046 const struct devlink_param *param,
4047 enum devlink_command cmd)
4048 {
4049 struct devlink_param_item *param_item;
4050
4051 if (devlink_param_find_by_name(param_list, param->name))
4052 return -EEXIST;
4053
4054 if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
4055 WARN_ON(param->get || param->set);
4056 else
4057 WARN_ON(!param->get || !param->set);
4058
4059 param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
4060 if (!param_item)
4061 return -ENOMEM;
4062 param_item->param = param;
4063
4064 list_add_tail(¶m_item->list, param_list);
4065 devlink_param_notify(devlink, port_index, param_item, cmd);
4066 return 0;
4067 }
4068
devlink_param_unregister_one(struct devlink * devlink,unsigned int port_index,struct list_head * param_list,const struct devlink_param * param,enum devlink_command cmd)4069 static void devlink_param_unregister_one(struct devlink *devlink,
4070 unsigned int port_index,
4071 struct list_head *param_list,
4072 const struct devlink_param *param,
4073 enum devlink_command cmd)
4074 {
4075 struct devlink_param_item *param_item;
4076
4077 param_item = devlink_param_find_by_name(param_list, param->name);
4078 WARN_ON(!param_item);
4079 devlink_param_notify(devlink, port_index, param_item, cmd);
4080 list_del(¶m_item->list);
4081 kfree(param_item);
4082 }
4083
devlink_nl_cmd_port_param_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)4084 static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
4085 struct netlink_callback *cb)
4086 {
4087 struct devlink_param_item *param_item;
4088 struct devlink_port *devlink_port;
4089 struct devlink *devlink;
4090 int start = cb->args[0];
4091 int idx = 0;
4092 int err = 0;
4093
4094 mutex_lock(&devlink_mutex);
4095 list_for_each_entry(devlink, &devlink_list, list) {
4096 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4097 continue;
4098 mutex_lock(&devlink->lock);
4099 list_for_each_entry(devlink_port, &devlink->port_list, list) {
4100 list_for_each_entry(param_item,
4101 &devlink_port->param_list, list) {
4102 if (idx < start) {
4103 idx++;
4104 continue;
4105 }
4106 err = devlink_nl_param_fill(msg,
4107 devlink_port->devlink,
4108 devlink_port->index, param_item,
4109 DEVLINK_CMD_PORT_PARAM_GET,
4110 NETLINK_CB(cb->skb).portid,
4111 cb->nlh->nlmsg_seq,
4112 NLM_F_MULTI);
4113 if (err == -EOPNOTSUPP) {
4114 err = 0;
4115 } else if (err) {
4116 mutex_unlock(&devlink->lock);
4117 goto out;
4118 }
4119 idx++;
4120 }
4121 }
4122 mutex_unlock(&devlink->lock);
4123 }
4124 out:
4125 mutex_unlock(&devlink_mutex);
4126
4127 if (err != -EMSGSIZE)
4128 return err;
4129
4130 cb->args[0] = idx;
4131 return msg->len;
4132 }
4133
devlink_nl_cmd_port_param_get_doit(struct sk_buff * skb,struct genl_info * info)4134 static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
4135 struct genl_info *info)
4136 {
4137 struct devlink_port *devlink_port = info->user_ptr[0];
4138 struct devlink_param_item *param_item;
4139 struct sk_buff *msg;
4140 int err;
4141
4142 param_item = devlink_param_get_from_info(&devlink_port->param_list,
4143 info);
4144 if (!param_item)
4145 return -EINVAL;
4146
4147 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4148 if (!msg)
4149 return -ENOMEM;
4150
4151 err = devlink_nl_param_fill(msg, devlink_port->devlink,
4152 devlink_port->index, param_item,
4153 DEVLINK_CMD_PORT_PARAM_GET,
4154 info->snd_portid, info->snd_seq, 0);
4155 if (err) {
4156 nlmsg_free(msg);
4157 return err;
4158 }
4159
4160 return genlmsg_reply(msg, info);
4161 }
4162
devlink_nl_cmd_port_param_set_doit(struct sk_buff * skb,struct genl_info * info)4163 static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
4164 struct genl_info *info)
4165 {
4166 struct devlink_port *devlink_port = info->user_ptr[0];
4167
4168 return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
4169 devlink_port->index,
4170 &devlink_port->param_list, info,
4171 DEVLINK_CMD_PORT_PARAM_NEW);
4172 }
4173
devlink_nl_region_snapshot_id_put(struct sk_buff * msg,struct devlink * devlink,struct devlink_snapshot * snapshot)4174 static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
4175 struct devlink *devlink,
4176 struct devlink_snapshot *snapshot)
4177 {
4178 struct nlattr *snap_attr;
4179 int err;
4180
4181 snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
4182 if (!snap_attr)
4183 return -EINVAL;
4184
4185 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
4186 if (err)
4187 goto nla_put_failure;
4188
4189 nla_nest_end(msg, snap_attr);
4190 return 0;
4191
4192 nla_put_failure:
4193 nla_nest_cancel(msg, snap_attr);
4194 return err;
4195 }
4196
devlink_nl_region_snapshots_id_put(struct sk_buff * msg,struct devlink * devlink,struct devlink_region * region)4197 static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
4198 struct devlink *devlink,
4199 struct devlink_region *region)
4200 {
4201 struct devlink_snapshot *snapshot;
4202 struct nlattr *snapshots_attr;
4203 int err;
4204
4205 snapshots_attr = nla_nest_start_noflag(msg,
4206 DEVLINK_ATTR_REGION_SNAPSHOTS);
4207 if (!snapshots_attr)
4208 return -EINVAL;
4209
4210 list_for_each_entry(snapshot, ®ion->snapshot_list, list) {
4211 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
4212 if (err)
4213 goto nla_put_failure;
4214 }
4215
4216 nla_nest_end(msg, snapshots_attr);
4217 return 0;
4218
4219 nla_put_failure:
4220 nla_nest_cancel(msg, snapshots_attr);
4221 return err;
4222 }
4223
devlink_nl_region_fill(struct sk_buff * msg,struct devlink * devlink,enum devlink_command cmd,u32 portid,u32 seq,int flags,struct devlink_region * region)4224 static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
4225 enum devlink_command cmd, u32 portid,
4226 u32 seq, int flags,
4227 struct devlink_region *region)
4228 {
4229 void *hdr;
4230 int err;
4231
4232 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
4233 if (!hdr)
4234 return -EMSGSIZE;
4235
4236 err = devlink_nl_put_handle(msg, devlink);
4237 if (err)
4238 goto nla_put_failure;
4239
4240 if (region->port) {
4241 err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
4242 region->port->index);
4243 if (err)
4244 goto nla_put_failure;
4245 }
4246
4247 err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->ops->name);
4248 if (err)
4249 goto nla_put_failure;
4250
4251 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
4252 region->size,
4253 DEVLINK_ATTR_PAD);
4254 if (err)
4255 goto nla_put_failure;
4256
4257 err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
4258 if (err)
4259 goto nla_put_failure;
4260
4261 genlmsg_end(msg, hdr);
4262 return 0;
4263
4264 nla_put_failure:
4265 genlmsg_cancel(msg, hdr);
4266 return err;
4267 }
4268
4269 static struct sk_buff *
devlink_nl_region_notify_build(struct devlink_region * region,struct devlink_snapshot * snapshot,enum devlink_command cmd,u32 portid,u32 seq)4270 devlink_nl_region_notify_build(struct devlink_region *region,
4271 struct devlink_snapshot *snapshot,
4272 enum devlink_command cmd, u32 portid, u32 seq)
4273 {
4274 struct devlink *devlink = region->devlink;
4275 struct sk_buff *msg;
4276 void *hdr;
4277 int err;
4278
4279
4280 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4281 if (!msg)
4282 return ERR_PTR(-ENOMEM);
4283
4284 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, 0, cmd);
4285 if (!hdr) {
4286 err = -EMSGSIZE;
4287 goto out_free_msg;
4288 }
4289
4290 err = devlink_nl_put_handle(msg, devlink);
4291 if (err)
4292 goto out_cancel_msg;
4293
4294 if (region->port) {
4295 err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
4296 region->port->index);
4297 if (err)
4298 goto out_cancel_msg;
4299 }
4300
4301 err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
4302 region->ops->name);
4303 if (err)
4304 goto out_cancel_msg;
4305
4306 if (snapshot) {
4307 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
4308 snapshot->id);
4309 if (err)
4310 goto out_cancel_msg;
4311 } else {
4312 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
4313 region->size, DEVLINK_ATTR_PAD);
4314 if (err)
4315 goto out_cancel_msg;
4316 }
4317 genlmsg_end(msg, hdr);
4318
4319 return msg;
4320
4321 out_cancel_msg:
4322 genlmsg_cancel(msg, hdr);
4323 out_free_msg:
4324 nlmsg_free(msg);
4325 return ERR_PTR(err);
4326 }
4327
devlink_nl_region_notify(struct devlink_region * region,struct devlink_snapshot * snapshot,enum devlink_command cmd)4328 static void devlink_nl_region_notify(struct devlink_region *region,
4329 struct devlink_snapshot *snapshot,
4330 enum devlink_command cmd)
4331 {
4332 struct devlink *devlink = region->devlink;
4333 struct sk_buff *msg;
4334
4335 WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
4336
4337 msg = devlink_nl_region_notify_build(region, snapshot, cmd, 0, 0);
4338 if (IS_ERR(msg))
4339 return;
4340
4341 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
4342 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
4343 }
4344
4345 /**
4346 * __devlink_snapshot_id_increment - Increment number of snapshots using an id
4347 * @devlink: devlink instance
4348 * @id: the snapshot id
4349 *
4350 * Track when a new snapshot begins using an id. Load the count for the
4351 * given id from the snapshot xarray, increment it, and store it back.
4352 *
4353 * Called when a new snapshot is created with the given id.
4354 *
4355 * The id *must* have been previously allocated by
4356 * devlink_region_snapshot_id_get().
4357 *
4358 * Returns 0 on success, or an error on failure.
4359 */
__devlink_snapshot_id_increment(struct devlink * devlink,u32 id)4360 static int __devlink_snapshot_id_increment(struct devlink *devlink, u32 id)
4361 {
4362 unsigned long count;
4363 void *p;
4364
4365 lockdep_assert_held(&devlink->lock);
4366
4367 p = xa_load(&devlink->snapshot_ids, id);
4368 if (WARN_ON(!p))
4369 return -EINVAL;
4370
4371 if (WARN_ON(!xa_is_value(p)))
4372 return -EINVAL;
4373
4374 count = xa_to_value(p);
4375 count++;
4376
4377 return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
4378 GFP_KERNEL));
4379 }
4380
4381 /**
4382 * __devlink_snapshot_id_decrement - Decrease number of snapshots using an id
4383 * @devlink: devlink instance
4384 * @id: the snapshot id
4385 *
4386 * Track when a snapshot is deleted and stops using an id. Load the count
4387 * for the given id from the snapshot xarray, decrement it, and store it
4388 * back.
4389 *
4390 * If the count reaches zero, erase this id from the xarray, freeing it
4391 * up for future re-use by devlink_region_snapshot_id_get().
4392 *
4393 * Called when a snapshot using the given id is deleted, and when the
4394 * initial allocator of the id is finished using it.
4395 */
__devlink_snapshot_id_decrement(struct devlink * devlink,u32 id)4396 static void __devlink_snapshot_id_decrement(struct devlink *devlink, u32 id)
4397 {
4398 unsigned long count;
4399 void *p;
4400
4401 lockdep_assert_held(&devlink->lock);
4402
4403 p = xa_load(&devlink->snapshot_ids, id);
4404 if (WARN_ON(!p))
4405 return;
4406
4407 if (WARN_ON(!xa_is_value(p)))
4408 return;
4409
4410 count = xa_to_value(p);
4411
4412 if (count > 1) {
4413 count--;
4414 xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
4415 GFP_KERNEL);
4416 } else {
4417 /* If this was the last user, we can erase this id */
4418 xa_erase(&devlink->snapshot_ids, id);
4419 }
4420 }
4421
4422 /**
4423 * __devlink_snapshot_id_insert - Insert a specific snapshot ID
4424 * @devlink: devlink instance
4425 * @id: the snapshot id
4426 *
4427 * Mark the given snapshot id as used by inserting a zero value into the
4428 * snapshot xarray.
4429 *
4430 * This must be called while holding the devlink instance lock. Unlike
4431 * devlink_snapshot_id_get, the initial reference count is zero, not one.
4432 * It is expected that the id will immediately be used before
4433 * releasing the devlink instance lock.
4434 *
4435 * Returns zero on success, or an error code if the snapshot id could not
4436 * be inserted.
4437 */
__devlink_snapshot_id_insert(struct devlink * devlink,u32 id)4438 static int __devlink_snapshot_id_insert(struct devlink *devlink, u32 id)
4439 {
4440 lockdep_assert_held(&devlink->lock);
4441
4442 if (xa_load(&devlink->snapshot_ids, id))
4443 return -EEXIST;
4444
4445 return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(0),
4446 GFP_KERNEL));
4447 }
4448
4449 /**
4450 * __devlink_region_snapshot_id_get - get snapshot ID
4451 * @devlink: devlink instance
4452 * @id: storage to return snapshot id
4453 *
4454 * Allocates a new snapshot id. Returns zero on success, or a negative
4455 * error on failure. Must be called while holding the devlink instance
4456 * lock.
4457 *
4458 * Snapshot IDs are tracked using an xarray which stores the number of
4459 * users of the snapshot id.
4460 *
4461 * Note that the caller of this function counts as a 'user', in order to
4462 * avoid race conditions. The caller must release its hold on the
4463 * snapshot by using devlink_region_snapshot_id_put.
4464 */
__devlink_region_snapshot_id_get(struct devlink * devlink,u32 * id)4465 static int __devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
4466 {
4467 lockdep_assert_held(&devlink->lock);
4468
4469 return xa_alloc(&devlink->snapshot_ids, id, xa_mk_value(1),
4470 xa_limit_32b, GFP_KERNEL);
4471 }
4472
4473 /**
4474 * __devlink_region_snapshot_create - create a new snapshot
4475 * This will add a new snapshot of a region. The snapshot
4476 * will be stored on the region struct and can be accessed
4477 * from devlink. This is useful for future analyses of snapshots.
4478 * Multiple snapshots can be created on a region.
4479 * The @snapshot_id should be obtained using the getter function.
4480 *
4481 * Must be called only while holding the devlink instance lock.
4482 *
4483 * @region: devlink region of the snapshot
4484 * @data: snapshot data
4485 * @snapshot_id: snapshot id to be created
4486 */
4487 static int
__devlink_region_snapshot_create(struct devlink_region * region,u8 * data,u32 snapshot_id)4488 __devlink_region_snapshot_create(struct devlink_region *region,
4489 u8 *data, u32 snapshot_id)
4490 {
4491 struct devlink *devlink = region->devlink;
4492 struct devlink_snapshot *snapshot;
4493 int err;
4494
4495 lockdep_assert_held(&devlink->lock);
4496
4497 /* check if region can hold one more snapshot */
4498 if (region->cur_snapshots == region->max_snapshots)
4499 return -ENOSPC;
4500
4501 if (devlink_region_snapshot_get_by_id(region, snapshot_id))
4502 return -EEXIST;
4503
4504 snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
4505 if (!snapshot)
4506 return -ENOMEM;
4507
4508 err = __devlink_snapshot_id_increment(devlink, snapshot_id);
4509 if (err)
4510 goto err_snapshot_id_increment;
4511
4512 snapshot->id = snapshot_id;
4513 snapshot->region = region;
4514 snapshot->data = data;
4515
4516 list_add_tail(&snapshot->list, ®ion->snapshot_list);
4517
4518 region->cur_snapshots++;
4519
4520 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
4521 return 0;
4522
4523 err_snapshot_id_increment:
4524 kfree(snapshot);
4525 return err;
4526 }
4527
devlink_region_snapshot_del(struct devlink_region * region,struct devlink_snapshot * snapshot)4528 static void devlink_region_snapshot_del(struct devlink_region *region,
4529 struct devlink_snapshot *snapshot)
4530 {
4531 struct devlink *devlink = region->devlink;
4532
4533 lockdep_assert_held(&devlink->lock);
4534
4535 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
4536 region->cur_snapshots--;
4537 list_del(&snapshot->list);
4538 region->ops->destructor(snapshot->data);
4539 __devlink_snapshot_id_decrement(devlink, snapshot->id);
4540 kfree(snapshot);
4541 }
4542
devlink_nl_cmd_region_get_doit(struct sk_buff * skb,struct genl_info * info)4543 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
4544 struct genl_info *info)
4545 {
4546 struct devlink *devlink = info->user_ptr[0];
4547 struct devlink_port *port = NULL;
4548 struct devlink_region *region;
4549 const char *region_name;
4550 struct sk_buff *msg;
4551 unsigned int index;
4552 int err;
4553
4554 if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
4555 return -EINVAL;
4556
4557 if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
4558 index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
4559
4560 port = devlink_port_get_by_index(devlink, index);
4561 if (!port)
4562 return -ENODEV;
4563 }
4564
4565 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
4566 if (port)
4567 region = devlink_port_region_get_by_name(port, region_name);
4568 else
4569 region = devlink_region_get_by_name(devlink, region_name);
4570
4571 if (!region)
4572 return -EINVAL;
4573
4574 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4575 if (!msg)
4576 return -ENOMEM;
4577
4578 err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
4579 info->snd_portid, info->snd_seq, 0,
4580 region);
4581 if (err) {
4582 nlmsg_free(msg);
4583 return err;
4584 }
4585
4586 return genlmsg_reply(msg, info);
4587 }
4588
devlink_nl_cmd_region_get_port_dumpit(struct sk_buff * msg,struct netlink_callback * cb,struct devlink_port * port,int * idx,int start)4589 static int devlink_nl_cmd_region_get_port_dumpit(struct sk_buff *msg,
4590 struct netlink_callback *cb,
4591 struct devlink_port *port,
4592 int *idx,
4593 int start)
4594 {
4595 struct devlink_region *region;
4596 int err = 0;
4597
4598 list_for_each_entry(region, &port->region_list, list) {
4599 if (*idx < start) {
4600 (*idx)++;
4601 continue;
4602 }
4603 err = devlink_nl_region_fill(msg, port->devlink,
4604 DEVLINK_CMD_REGION_GET,
4605 NETLINK_CB(cb->skb).portid,
4606 cb->nlh->nlmsg_seq,
4607 NLM_F_MULTI, region);
4608 if (err)
4609 goto out;
4610 (*idx)++;
4611 }
4612
4613 out:
4614 return err;
4615 }
4616
devlink_nl_cmd_region_get_devlink_dumpit(struct sk_buff * msg,struct netlink_callback * cb,struct devlink * devlink,int * idx,int start)4617 static int devlink_nl_cmd_region_get_devlink_dumpit(struct sk_buff *msg,
4618 struct netlink_callback *cb,
4619 struct devlink *devlink,
4620 int *idx,
4621 int start)
4622 {
4623 struct devlink_region *region;
4624 struct devlink_port *port;
4625 int err = 0;
4626
4627 mutex_lock(&devlink->lock);
4628 list_for_each_entry(region, &devlink->region_list, list) {
4629 if (*idx < start) {
4630 (*idx)++;
4631 continue;
4632 }
4633 err = devlink_nl_region_fill(msg, devlink,
4634 DEVLINK_CMD_REGION_GET,
4635 NETLINK_CB(cb->skb).portid,
4636 cb->nlh->nlmsg_seq,
4637 NLM_F_MULTI, region);
4638 if (err)
4639 goto out;
4640 (*idx)++;
4641 }
4642
4643 list_for_each_entry(port, &devlink->port_list, list) {
4644 err = devlink_nl_cmd_region_get_port_dumpit(msg, cb, port, idx,
4645 start);
4646 if (err)
4647 goto out;
4648 }
4649
4650 out:
4651 mutex_unlock(&devlink->lock);
4652 return err;
4653 }
4654
devlink_nl_cmd_region_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)4655 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
4656 struct netlink_callback *cb)
4657 {
4658 struct devlink *devlink;
4659 int start = cb->args[0];
4660 int idx = 0;
4661 int err;
4662
4663 mutex_lock(&devlink_mutex);
4664 list_for_each_entry(devlink, &devlink_list, list) {
4665 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
4666 continue;
4667 err = devlink_nl_cmd_region_get_devlink_dumpit(msg, cb, devlink,
4668 &idx, start);
4669 if (err)
4670 goto out;
4671 }
4672 out:
4673 mutex_unlock(&devlink_mutex);
4674 cb->args[0] = idx;
4675 return msg->len;
4676 }
4677
devlink_nl_cmd_region_del(struct sk_buff * skb,struct genl_info * info)4678 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
4679 struct genl_info *info)
4680 {
4681 struct devlink *devlink = info->user_ptr[0];
4682 struct devlink_snapshot *snapshot;
4683 struct devlink_port *port = NULL;
4684 struct devlink_region *region;
4685 const char *region_name;
4686 unsigned int index;
4687 u32 snapshot_id;
4688
4689 if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
4690 !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
4691 return -EINVAL;
4692
4693 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
4694 snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
4695
4696 if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
4697 index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
4698
4699 port = devlink_port_get_by_index(devlink, index);
4700 if (!port)
4701 return -ENODEV;
4702 }
4703
4704 if (port)
4705 region = devlink_port_region_get_by_name(port, region_name);
4706 else
4707 region = devlink_region_get_by_name(devlink, region_name);
4708
4709 if (!region)
4710 return -EINVAL;
4711
4712 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
4713 if (!snapshot)
4714 return -EINVAL;
4715
4716 devlink_region_snapshot_del(region, snapshot);
4717 return 0;
4718 }
4719
4720 static int
devlink_nl_cmd_region_new(struct sk_buff * skb,struct genl_info * info)4721 devlink_nl_cmd_region_new(struct sk_buff *skb, struct genl_info *info)
4722 {
4723 struct devlink *devlink = info->user_ptr[0];
4724 struct devlink_snapshot *snapshot;
4725 struct devlink_port *port = NULL;
4726 struct nlattr *snapshot_id_attr;
4727 struct devlink_region *region;
4728 const char *region_name;
4729 unsigned int index;
4730 u32 snapshot_id;
4731 u8 *data;
4732 int err;
4733
4734 if (!info->attrs[DEVLINK_ATTR_REGION_NAME]) {
4735 NL_SET_ERR_MSG_MOD(info->extack, "No region name provided");
4736 return -EINVAL;
4737 }
4738
4739 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
4740
4741 if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
4742 index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
4743
4744 port = devlink_port_get_by_index(devlink, index);
4745 if (!port)
4746 return -ENODEV;
4747 }
4748
4749 if (port)
4750 region = devlink_port_region_get_by_name(port, region_name);
4751 else
4752 region = devlink_region_get_by_name(devlink, region_name);
4753
4754 if (!region) {
4755 NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not exist");
4756 return -EINVAL;
4757 }
4758
4759 if (!region->ops->snapshot) {
4760 NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not support taking an immediate snapshot");
4761 return -EOPNOTSUPP;
4762 }
4763
4764 if (region->cur_snapshots == region->max_snapshots) {
4765 NL_SET_ERR_MSG_MOD(info->extack, "The region has reached the maximum number of stored snapshots");
4766 return -ENOSPC;
4767 }
4768
4769 snapshot_id_attr = info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID];
4770 if (snapshot_id_attr) {
4771 snapshot_id = nla_get_u32(snapshot_id_attr);
4772
4773 if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
4774 NL_SET_ERR_MSG_MOD(info->extack, "The requested snapshot id is already in use");
4775 return -EEXIST;
4776 }
4777
4778 err = __devlink_snapshot_id_insert(devlink, snapshot_id);
4779 if (err)
4780 return err;
4781 } else {
4782 err = __devlink_region_snapshot_id_get(devlink, &snapshot_id);
4783 if (err) {
4784 NL_SET_ERR_MSG_MOD(info->extack, "Failed to allocate a new snapshot id");
4785 return err;
4786 }
4787 }
4788
4789 if (port)
4790 err = region->port_ops->snapshot(port, region->port_ops,
4791 info->extack, &data);
4792 else
4793 err = region->ops->snapshot(devlink, region->ops,
4794 info->extack, &data);
4795 if (err)
4796 goto err_snapshot_capture;
4797
4798 err = __devlink_region_snapshot_create(region, data, snapshot_id);
4799 if (err)
4800 goto err_snapshot_create;
4801
4802 if (!snapshot_id_attr) {
4803 struct sk_buff *msg;
4804
4805 snapshot = devlink_region_snapshot_get_by_id(region,
4806 snapshot_id);
4807 if (WARN_ON(!snapshot))
4808 return -EINVAL;
4809
4810 msg = devlink_nl_region_notify_build(region, snapshot,
4811 DEVLINK_CMD_REGION_NEW,
4812 info->snd_portid,
4813 info->snd_seq);
4814 err = PTR_ERR_OR_ZERO(msg);
4815 if (err)
4816 goto err_notify;
4817
4818 err = genlmsg_reply(msg, info);
4819 if (err)
4820 goto err_notify;
4821 }
4822
4823 return 0;
4824
4825 err_snapshot_create:
4826 region->ops->destructor(data);
4827 err_snapshot_capture:
4828 __devlink_snapshot_id_decrement(devlink, snapshot_id);
4829 return err;
4830
4831 err_notify:
4832 devlink_region_snapshot_del(region, snapshot);
4833 return err;
4834 }
4835
devlink_nl_cmd_region_read_chunk_fill(struct sk_buff * msg,struct devlink * devlink,u8 * chunk,u32 chunk_size,u64 addr)4836 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
4837 struct devlink *devlink,
4838 u8 *chunk, u32 chunk_size,
4839 u64 addr)
4840 {
4841 struct nlattr *chunk_attr;
4842 int err;
4843
4844 chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK);
4845 if (!chunk_attr)
4846 return -EINVAL;
4847
4848 err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
4849 if (err)
4850 goto nla_put_failure;
4851
4852 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
4853 DEVLINK_ATTR_PAD);
4854 if (err)
4855 goto nla_put_failure;
4856
4857 nla_nest_end(msg, chunk_attr);
4858 return 0;
4859
4860 nla_put_failure:
4861 nla_nest_cancel(msg, chunk_attr);
4862 return err;
4863 }
4864
4865 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
4866
devlink_nl_region_read_snapshot_fill(struct sk_buff * skb,struct devlink * devlink,struct devlink_region * region,struct nlattr ** attrs,u64 start_offset,u64 end_offset,u64 * new_offset)4867 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
4868 struct devlink *devlink,
4869 struct devlink_region *region,
4870 struct nlattr **attrs,
4871 u64 start_offset,
4872 u64 end_offset,
4873 u64 *new_offset)
4874 {
4875 struct devlink_snapshot *snapshot;
4876 u64 curr_offset = start_offset;
4877 u32 snapshot_id;
4878 int err = 0;
4879
4880 *new_offset = start_offset;
4881
4882 snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
4883 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
4884 if (!snapshot)
4885 return -EINVAL;
4886
4887 while (curr_offset < end_offset) {
4888 u32 data_size;
4889 u8 *data;
4890
4891 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
4892 data_size = end_offset - curr_offset;
4893 else
4894 data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
4895
4896 data = &snapshot->data[curr_offset];
4897 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
4898 data, data_size,
4899 curr_offset);
4900 if (err)
4901 break;
4902
4903 curr_offset += data_size;
4904 }
4905 *new_offset = curr_offset;
4906
4907 return err;
4908 }
4909
devlink_nl_cmd_region_read_dumpit(struct sk_buff * skb,struct netlink_callback * cb)4910 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
4911 struct netlink_callback *cb)
4912 {
4913 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
4914 u64 ret_offset, start_offset, end_offset = U64_MAX;
4915 struct nlattr **attrs = info->attrs;
4916 struct devlink_port *port = NULL;
4917 struct devlink_region *region;
4918 struct nlattr *chunks_attr;
4919 const char *region_name;
4920 struct devlink *devlink;
4921 unsigned int index;
4922 void *hdr;
4923 int err;
4924
4925 start_offset = *((u64 *)&cb->args[0]);
4926
4927 mutex_lock(&devlink_mutex);
4928 devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
4929 if (IS_ERR(devlink)) {
4930 err = PTR_ERR(devlink);
4931 goto out_dev;
4932 }
4933
4934 mutex_lock(&devlink->lock);
4935
4936 if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
4937 !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
4938 err = -EINVAL;
4939 goto out_unlock;
4940 }
4941
4942 if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
4943 index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
4944
4945 port = devlink_port_get_by_index(devlink, index);
4946 if (!port) {
4947 err = -ENODEV;
4948 goto out_unlock;
4949 }
4950 }
4951
4952 region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
4953
4954 if (port)
4955 region = devlink_port_region_get_by_name(port, region_name);
4956 else
4957 region = devlink_region_get_by_name(devlink, region_name);
4958
4959 if (!region) {
4960 err = -EINVAL;
4961 goto out_unlock;
4962 }
4963
4964 if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
4965 attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
4966 if (!start_offset)
4967 start_offset =
4968 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4969
4970 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
4971 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
4972 }
4973
4974 if (end_offset > region->size)
4975 end_offset = region->size;
4976
4977 /* return 0 if there is no further data to read */
4978 if (start_offset == end_offset) {
4979 err = 0;
4980 goto out_unlock;
4981 }
4982
4983 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
4984 &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
4985 DEVLINK_CMD_REGION_READ);
4986 if (!hdr) {
4987 err = -EMSGSIZE;
4988 goto out_unlock;
4989 }
4990
4991 err = devlink_nl_put_handle(skb, devlink);
4992 if (err)
4993 goto nla_put_failure;
4994
4995 if (region->port) {
4996 err = nla_put_u32(skb, DEVLINK_ATTR_PORT_INDEX,
4997 region->port->index);
4998 if (err)
4999 goto nla_put_failure;
5000 }
5001
5002 err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
5003 if (err)
5004 goto nla_put_failure;
5005
5006 chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS);
5007 if (!chunks_attr) {
5008 err = -EMSGSIZE;
5009 goto nla_put_failure;
5010 }
5011
5012 err = devlink_nl_region_read_snapshot_fill(skb, devlink,
5013 region, attrs,
5014 start_offset,
5015 end_offset, &ret_offset);
5016
5017 if (err && err != -EMSGSIZE)
5018 goto nla_put_failure;
5019
5020 /* Check if there was any progress done to prevent infinite loop */
5021 if (ret_offset == start_offset) {
5022 err = -EINVAL;
5023 goto nla_put_failure;
5024 }
5025
5026 *((u64 *)&cb->args[0]) = ret_offset;
5027
5028 nla_nest_end(skb, chunks_attr);
5029 genlmsg_end(skb, hdr);
5030 mutex_unlock(&devlink->lock);
5031 mutex_unlock(&devlink_mutex);
5032
5033 return skb->len;
5034
5035 nla_put_failure:
5036 genlmsg_cancel(skb, hdr);
5037 out_unlock:
5038 mutex_unlock(&devlink->lock);
5039 out_dev:
5040 mutex_unlock(&devlink_mutex);
5041 return err;
5042 }
5043
5044 struct devlink_info_req {
5045 struct sk_buff *msg;
5046 };
5047
devlink_info_driver_name_put(struct devlink_info_req * req,const char * name)5048 int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
5049 {
5050 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
5051 }
5052 EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
5053
devlink_info_serial_number_put(struct devlink_info_req * req,const char * sn)5054 int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
5055 {
5056 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
5057 }
5058 EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
5059
devlink_info_board_serial_number_put(struct devlink_info_req * req,const char * bsn)5060 int devlink_info_board_serial_number_put(struct devlink_info_req *req,
5061 const char *bsn)
5062 {
5063 return nla_put_string(req->msg, DEVLINK_ATTR_INFO_BOARD_SERIAL_NUMBER,
5064 bsn);
5065 }
5066 EXPORT_SYMBOL_GPL(devlink_info_board_serial_number_put);
5067
devlink_info_version_put(struct devlink_info_req * req,int attr,const char * version_name,const char * version_value)5068 static int devlink_info_version_put(struct devlink_info_req *req, int attr,
5069 const char *version_name,
5070 const char *version_value)
5071 {
5072 struct nlattr *nest;
5073 int err;
5074
5075 nest = nla_nest_start_noflag(req->msg, attr);
5076 if (!nest)
5077 return -EMSGSIZE;
5078
5079 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
5080 version_name);
5081 if (err)
5082 goto nla_put_failure;
5083
5084 err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
5085 version_value);
5086 if (err)
5087 goto nla_put_failure;
5088
5089 nla_nest_end(req->msg, nest);
5090
5091 return 0;
5092
5093 nla_put_failure:
5094 nla_nest_cancel(req->msg, nest);
5095 return err;
5096 }
5097
devlink_info_version_fixed_put(struct devlink_info_req * req,const char * version_name,const char * version_value)5098 int devlink_info_version_fixed_put(struct devlink_info_req *req,
5099 const char *version_name,
5100 const char *version_value)
5101 {
5102 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
5103 version_name, version_value);
5104 }
5105 EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
5106
devlink_info_version_stored_put(struct devlink_info_req * req,const char * version_name,const char * version_value)5107 int devlink_info_version_stored_put(struct devlink_info_req *req,
5108 const char *version_name,
5109 const char *version_value)
5110 {
5111 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
5112 version_name, version_value);
5113 }
5114 EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
5115
devlink_info_version_running_put(struct devlink_info_req * req,const char * version_name,const char * version_value)5116 int devlink_info_version_running_put(struct devlink_info_req *req,
5117 const char *version_name,
5118 const char *version_value)
5119 {
5120 return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
5121 version_name, version_value);
5122 }
5123 EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
5124
5125 static int
devlink_nl_info_fill(struct sk_buff * msg,struct devlink * devlink,enum devlink_command cmd,u32 portid,u32 seq,int flags,struct netlink_ext_ack * extack)5126 devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
5127 enum devlink_command cmd, u32 portid,
5128 u32 seq, int flags, struct netlink_ext_ack *extack)
5129 {
5130 struct devlink_info_req req;
5131 void *hdr;
5132 int err;
5133
5134 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
5135 if (!hdr)
5136 return -EMSGSIZE;
5137
5138 err = -EMSGSIZE;
5139 if (devlink_nl_put_handle(msg, devlink))
5140 goto err_cancel_msg;
5141
5142 req.msg = msg;
5143 err = devlink->ops->info_get(devlink, &req, extack);
5144 if (err)
5145 goto err_cancel_msg;
5146
5147 genlmsg_end(msg, hdr);
5148 return 0;
5149
5150 err_cancel_msg:
5151 genlmsg_cancel(msg, hdr);
5152 return err;
5153 }
5154
devlink_nl_cmd_info_get_doit(struct sk_buff * skb,struct genl_info * info)5155 static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
5156 struct genl_info *info)
5157 {
5158 struct devlink *devlink = info->user_ptr[0];
5159 struct sk_buff *msg;
5160 int err;
5161
5162 if (!devlink->ops->info_get)
5163 return -EOPNOTSUPP;
5164
5165 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5166 if (!msg)
5167 return -ENOMEM;
5168
5169 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
5170 info->snd_portid, info->snd_seq, 0,
5171 info->extack);
5172 if (err) {
5173 nlmsg_free(msg);
5174 return err;
5175 }
5176
5177 return genlmsg_reply(msg, info);
5178 }
5179
devlink_nl_cmd_info_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)5180 static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
5181 struct netlink_callback *cb)
5182 {
5183 struct devlink *devlink;
5184 int start = cb->args[0];
5185 int idx = 0;
5186 int err = 0;
5187
5188 mutex_lock(&devlink_mutex);
5189 list_for_each_entry(devlink, &devlink_list, list) {
5190 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
5191 continue;
5192 if (idx < start) {
5193 idx++;
5194 continue;
5195 }
5196
5197 if (!devlink->ops->info_get) {
5198 idx++;
5199 continue;
5200 }
5201
5202 mutex_lock(&devlink->lock);
5203 err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
5204 NETLINK_CB(cb->skb).portid,
5205 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5206 cb->extack);
5207 mutex_unlock(&devlink->lock);
5208 if (err == -EOPNOTSUPP)
5209 err = 0;
5210 else if (err)
5211 break;
5212 idx++;
5213 }
5214 mutex_unlock(&devlink_mutex);
5215
5216 if (err != -EMSGSIZE)
5217 return err;
5218
5219 cb->args[0] = idx;
5220 return msg->len;
5221 }
5222
5223 struct devlink_fmsg_item {
5224 struct list_head list;
5225 int attrtype;
5226 u8 nla_type;
5227 u16 len;
5228 int value[];
5229 };
5230
5231 struct devlink_fmsg {
5232 struct list_head item_list;
5233 bool putting_binary; /* This flag forces enclosing of binary data
5234 * in an array brackets. It forces using
5235 * of designated API:
5236 * devlink_fmsg_binary_pair_nest_start()
5237 * devlink_fmsg_binary_pair_nest_end()
5238 */
5239 };
5240
devlink_fmsg_alloc(void)5241 static struct devlink_fmsg *devlink_fmsg_alloc(void)
5242 {
5243 struct devlink_fmsg *fmsg;
5244
5245 fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
5246 if (!fmsg)
5247 return NULL;
5248
5249 INIT_LIST_HEAD(&fmsg->item_list);
5250
5251 return fmsg;
5252 }
5253
devlink_fmsg_free(struct devlink_fmsg * fmsg)5254 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
5255 {
5256 struct devlink_fmsg_item *item, *tmp;
5257
5258 list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
5259 list_del(&item->list);
5260 kfree(item);
5261 }
5262 kfree(fmsg);
5263 }
5264
devlink_fmsg_nest_common(struct devlink_fmsg * fmsg,int attrtype)5265 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
5266 int attrtype)
5267 {
5268 struct devlink_fmsg_item *item;
5269
5270 item = kzalloc(sizeof(*item), GFP_KERNEL);
5271 if (!item)
5272 return -ENOMEM;
5273
5274 item->attrtype = attrtype;
5275 list_add_tail(&item->list, &fmsg->item_list);
5276
5277 return 0;
5278 }
5279
devlink_fmsg_obj_nest_start(struct devlink_fmsg * fmsg)5280 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
5281 {
5282 if (fmsg->putting_binary)
5283 return -EINVAL;
5284
5285 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
5286 }
5287 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
5288
devlink_fmsg_nest_end(struct devlink_fmsg * fmsg)5289 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
5290 {
5291 if (fmsg->putting_binary)
5292 return -EINVAL;
5293
5294 return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
5295 }
5296
devlink_fmsg_obj_nest_end(struct devlink_fmsg * fmsg)5297 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
5298 {
5299 if (fmsg->putting_binary)
5300 return -EINVAL;
5301
5302 return devlink_fmsg_nest_end(fmsg);
5303 }
5304 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
5305
5306 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
5307
devlink_fmsg_put_name(struct devlink_fmsg * fmsg,const char * name)5308 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
5309 {
5310 struct devlink_fmsg_item *item;
5311
5312 if (fmsg->putting_binary)
5313 return -EINVAL;
5314
5315 if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
5316 return -EMSGSIZE;
5317
5318 item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
5319 if (!item)
5320 return -ENOMEM;
5321
5322 item->nla_type = NLA_NUL_STRING;
5323 item->len = strlen(name) + 1;
5324 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
5325 memcpy(&item->value, name, item->len);
5326 list_add_tail(&item->list, &fmsg->item_list);
5327
5328 return 0;
5329 }
5330
devlink_fmsg_pair_nest_start(struct devlink_fmsg * fmsg,const char * name)5331 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
5332 {
5333 int err;
5334
5335 if (fmsg->putting_binary)
5336 return -EINVAL;
5337
5338 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
5339 if (err)
5340 return err;
5341
5342 err = devlink_fmsg_put_name(fmsg, name);
5343 if (err)
5344 return err;
5345
5346 return 0;
5347 }
5348 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
5349
devlink_fmsg_pair_nest_end(struct devlink_fmsg * fmsg)5350 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
5351 {
5352 if (fmsg->putting_binary)
5353 return -EINVAL;
5354
5355 return devlink_fmsg_nest_end(fmsg);
5356 }
5357 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
5358
devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg * fmsg,const char * name)5359 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
5360 const char *name)
5361 {
5362 int err;
5363
5364 if (fmsg->putting_binary)
5365 return -EINVAL;
5366
5367 err = devlink_fmsg_pair_nest_start(fmsg, name);
5368 if (err)
5369 return err;
5370
5371 err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
5372 if (err)
5373 return err;
5374
5375 return 0;
5376 }
5377 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
5378
devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg * fmsg)5379 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
5380 {
5381 int err;
5382
5383 if (fmsg->putting_binary)
5384 return -EINVAL;
5385
5386 err = devlink_fmsg_nest_end(fmsg);
5387 if (err)
5388 return err;
5389
5390 err = devlink_fmsg_nest_end(fmsg);
5391 if (err)
5392 return err;
5393
5394 return 0;
5395 }
5396 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
5397
devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg * fmsg,const char * name)5398 int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg,
5399 const char *name)
5400 {
5401 int err;
5402
5403 err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
5404 if (err)
5405 return err;
5406
5407 fmsg->putting_binary = true;
5408 return err;
5409 }
5410 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_start);
5411
devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg * fmsg)5412 int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg)
5413 {
5414 if (!fmsg->putting_binary)
5415 return -EINVAL;
5416
5417 fmsg->putting_binary = false;
5418 return devlink_fmsg_arr_pair_nest_end(fmsg);
5419 }
5420 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_end);
5421
devlink_fmsg_put_value(struct devlink_fmsg * fmsg,const void * value,u16 value_len,u8 value_nla_type)5422 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
5423 const void *value, u16 value_len,
5424 u8 value_nla_type)
5425 {
5426 struct devlink_fmsg_item *item;
5427
5428 if (value_len > DEVLINK_FMSG_MAX_SIZE)
5429 return -EMSGSIZE;
5430
5431 item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
5432 if (!item)
5433 return -ENOMEM;
5434
5435 item->nla_type = value_nla_type;
5436 item->len = value_len;
5437 item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
5438 memcpy(&item->value, value, item->len);
5439 list_add_tail(&item->list, &fmsg->item_list);
5440
5441 return 0;
5442 }
5443
devlink_fmsg_bool_put(struct devlink_fmsg * fmsg,bool value)5444 int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
5445 {
5446 if (fmsg->putting_binary)
5447 return -EINVAL;
5448
5449 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
5450 }
5451 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
5452
devlink_fmsg_u8_put(struct devlink_fmsg * fmsg,u8 value)5453 int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
5454 {
5455 if (fmsg->putting_binary)
5456 return -EINVAL;
5457
5458 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
5459 }
5460 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
5461
devlink_fmsg_u32_put(struct devlink_fmsg * fmsg,u32 value)5462 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
5463 {
5464 if (fmsg->putting_binary)
5465 return -EINVAL;
5466
5467 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
5468 }
5469 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
5470
devlink_fmsg_u64_put(struct devlink_fmsg * fmsg,u64 value)5471 int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
5472 {
5473 if (fmsg->putting_binary)
5474 return -EINVAL;
5475
5476 return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
5477 }
5478 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
5479
devlink_fmsg_string_put(struct devlink_fmsg * fmsg,const char * value)5480 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
5481 {
5482 if (fmsg->putting_binary)
5483 return -EINVAL;
5484
5485 return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
5486 NLA_NUL_STRING);
5487 }
5488 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
5489
devlink_fmsg_binary_put(struct devlink_fmsg * fmsg,const void * value,u16 value_len)5490 int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
5491 u16 value_len)
5492 {
5493 if (!fmsg->putting_binary)
5494 return -EINVAL;
5495
5496 return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
5497 }
5498 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
5499
devlink_fmsg_bool_pair_put(struct devlink_fmsg * fmsg,const char * name,bool value)5500 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
5501 bool value)
5502 {
5503 int err;
5504
5505 err = devlink_fmsg_pair_nest_start(fmsg, name);
5506 if (err)
5507 return err;
5508
5509 err = devlink_fmsg_bool_put(fmsg, value);
5510 if (err)
5511 return err;
5512
5513 err = devlink_fmsg_pair_nest_end(fmsg);
5514 if (err)
5515 return err;
5516
5517 return 0;
5518 }
5519 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
5520
devlink_fmsg_u8_pair_put(struct devlink_fmsg * fmsg,const char * name,u8 value)5521 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
5522 u8 value)
5523 {
5524 int err;
5525
5526 err = devlink_fmsg_pair_nest_start(fmsg, name);
5527 if (err)
5528 return err;
5529
5530 err = devlink_fmsg_u8_put(fmsg, value);
5531 if (err)
5532 return err;
5533
5534 err = devlink_fmsg_pair_nest_end(fmsg);
5535 if (err)
5536 return err;
5537
5538 return 0;
5539 }
5540 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
5541
devlink_fmsg_u32_pair_put(struct devlink_fmsg * fmsg,const char * name,u32 value)5542 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
5543 u32 value)
5544 {
5545 int err;
5546
5547 err = devlink_fmsg_pair_nest_start(fmsg, name);
5548 if (err)
5549 return err;
5550
5551 err = devlink_fmsg_u32_put(fmsg, value);
5552 if (err)
5553 return err;
5554
5555 err = devlink_fmsg_pair_nest_end(fmsg);
5556 if (err)
5557 return err;
5558
5559 return 0;
5560 }
5561 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
5562
devlink_fmsg_u64_pair_put(struct devlink_fmsg * fmsg,const char * name,u64 value)5563 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
5564 u64 value)
5565 {
5566 int err;
5567
5568 err = devlink_fmsg_pair_nest_start(fmsg, name);
5569 if (err)
5570 return err;
5571
5572 err = devlink_fmsg_u64_put(fmsg, value);
5573 if (err)
5574 return err;
5575
5576 err = devlink_fmsg_pair_nest_end(fmsg);
5577 if (err)
5578 return err;
5579
5580 return 0;
5581 }
5582 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
5583
devlink_fmsg_string_pair_put(struct devlink_fmsg * fmsg,const char * name,const char * value)5584 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
5585 const char *value)
5586 {
5587 int err;
5588
5589 err = devlink_fmsg_pair_nest_start(fmsg, name);
5590 if (err)
5591 return err;
5592
5593 err = devlink_fmsg_string_put(fmsg, value);
5594 if (err)
5595 return err;
5596
5597 err = devlink_fmsg_pair_nest_end(fmsg);
5598 if (err)
5599 return err;
5600
5601 return 0;
5602 }
5603 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
5604
devlink_fmsg_binary_pair_put(struct devlink_fmsg * fmsg,const char * name,const void * value,u32 value_len)5605 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
5606 const void *value, u32 value_len)
5607 {
5608 u32 data_size;
5609 int end_err;
5610 u32 offset;
5611 int err;
5612
5613 err = devlink_fmsg_binary_pair_nest_start(fmsg, name);
5614 if (err)
5615 return err;
5616
5617 for (offset = 0; offset < value_len; offset += data_size) {
5618 data_size = value_len - offset;
5619 if (data_size > DEVLINK_FMSG_MAX_SIZE)
5620 data_size = DEVLINK_FMSG_MAX_SIZE;
5621 err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
5622 if (err)
5623 break;
5624 /* Exit from loop with a break (instead of
5625 * return) to make sure putting_binary is turned off in
5626 * devlink_fmsg_binary_pair_nest_end
5627 */
5628 }
5629
5630 end_err = devlink_fmsg_binary_pair_nest_end(fmsg);
5631 if (end_err)
5632 err = end_err;
5633
5634 return err;
5635 }
5636 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
5637
5638 static int
devlink_fmsg_item_fill_type(struct devlink_fmsg_item * msg,struct sk_buff * skb)5639 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
5640 {
5641 switch (msg->nla_type) {
5642 case NLA_FLAG:
5643 case NLA_U8:
5644 case NLA_U32:
5645 case NLA_U64:
5646 case NLA_NUL_STRING:
5647 case NLA_BINARY:
5648 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
5649 msg->nla_type);
5650 default:
5651 return -EINVAL;
5652 }
5653 }
5654
5655 static int
devlink_fmsg_item_fill_data(struct devlink_fmsg_item * msg,struct sk_buff * skb)5656 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
5657 {
5658 int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
5659 u8 tmp;
5660
5661 switch (msg->nla_type) {
5662 case NLA_FLAG:
5663 /* Always provide flag data, regardless of its value */
5664 tmp = *(bool *) msg->value;
5665
5666 return nla_put_u8(skb, attrtype, tmp);
5667 case NLA_U8:
5668 return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
5669 case NLA_U32:
5670 return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
5671 case NLA_U64:
5672 return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
5673 DEVLINK_ATTR_PAD);
5674 case NLA_NUL_STRING:
5675 return nla_put_string(skb, attrtype, (char *) &msg->value);
5676 case NLA_BINARY:
5677 return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
5678 default:
5679 return -EINVAL;
5680 }
5681 }
5682
5683 static int
devlink_fmsg_prepare_skb(struct devlink_fmsg * fmsg,struct sk_buff * skb,int * start)5684 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
5685 int *start)
5686 {
5687 struct devlink_fmsg_item *item;
5688 struct nlattr *fmsg_nlattr;
5689 int i = 0;
5690 int err;
5691
5692 fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
5693 if (!fmsg_nlattr)
5694 return -EMSGSIZE;
5695
5696 list_for_each_entry(item, &fmsg->item_list, list) {
5697 if (i < *start) {
5698 i++;
5699 continue;
5700 }
5701
5702 switch (item->attrtype) {
5703 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
5704 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
5705 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
5706 case DEVLINK_ATTR_FMSG_NEST_END:
5707 err = nla_put_flag(skb, item->attrtype);
5708 break;
5709 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
5710 err = devlink_fmsg_item_fill_type(item, skb);
5711 if (err)
5712 break;
5713 err = devlink_fmsg_item_fill_data(item, skb);
5714 break;
5715 case DEVLINK_ATTR_FMSG_OBJ_NAME:
5716 err = nla_put_string(skb, item->attrtype,
5717 (char *) &item->value);
5718 break;
5719 default:
5720 err = -EINVAL;
5721 break;
5722 }
5723 if (!err)
5724 *start = ++i;
5725 else
5726 break;
5727 }
5728
5729 nla_nest_end(skb, fmsg_nlattr);
5730 return err;
5731 }
5732
devlink_fmsg_snd(struct devlink_fmsg * fmsg,struct genl_info * info,enum devlink_command cmd,int flags)5733 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
5734 struct genl_info *info,
5735 enum devlink_command cmd, int flags)
5736 {
5737 struct nlmsghdr *nlh;
5738 struct sk_buff *skb;
5739 bool last = false;
5740 int index = 0;
5741 void *hdr;
5742 int err;
5743
5744 while (!last) {
5745 int tmp_index = index;
5746
5747 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
5748 if (!skb)
5749 return -ENOMEM;
5750
5751 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
5752 &devlink_nl_family, flags | NLM_F_MULTI, cmd);
5753 if (!hdr) {
5754 err = -EMSGSIZE;
5755 goto nla_put_failure;
5756 }
5757
5758 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
5759 if (!err)
5760 last = true;
5761 else if (err != -EMSGSIZE || tmp_index == index)
5762 goto nla_put_failure;
5763
5764 genlmsg_end(skb, hdr);
5765 err = genlmsg_reply(skb, info);
5766 if (err)
5767 return err;
5768 }
5769
5770 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
5771 if (!skb)
5772 return -ENOMEM;
5773 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
5774 NLMSG_DONE, 0, flags | NLM_F_MULTI);
5775 if (!nlh) {
5776 err = -EMSGSIZE;
5777 goto nla_put_failure;
5778 }
5779
5780 return genlmsg_reply(skb, info);
5781
5782 nla_put_failure:
5783 nlmsg_free(skb);
5784 return err;
5785 }
5786
devlink_fmsg_dumpit(struct devlink_fmsg * fmsg,struct sk_buff * skb,struct netlink_callback * cb,enum devlink_command cmd)5787 static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
5788 struct netlink_callback *cb,
5789 enum devlink_command cmd)
5790 {
5791 int index = cb->args[0];
5792 int tmp_index = index;
5793 void *hdr;
5794 int err;
5795
5796 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
5797 &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
5798 if (!hdr) {
5799 err = -EMSGSIZE;
5800 goto nla_put_failure;
5801 }
5802
5803 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
5804 if ((err && err != -EMSGSIZE) || tmp_index == index)
5805 goto nla_put_failure;
5806
5807 cb->args[0] = index;
5808 genlmsg_end(skb, hdr);
5809 return skb->len;
5810
5811 nla_put_failure:
5812 genlmsg_cancel(skb, hdr);
5813 return err;
5814 }
5815
5816 struct devlink_health_reporter {
5817 struct list_head list;
5818 void *priv;
5819 const struct devlink_health_reporter_ops *ops;
5820 struct devlink *devlink;
5821 struct devlink_port *devlink_port;
5822 struct devlink_fmsg *dump_fmsg;
5823 struct mutex dump_lock; /* lock parallel read/write from dump buffers */
5824 u64 graceful_period;
5825 bool auto_recover;
5826 bool auto_dump;
5827 u8 health_state;
5828 u64 dump_ts;
5829 u64 dump_real_ts;
5830 u64 error_count;
5831 u64 recovery_count;
5832 u64 last_recovery_ts;
5833 refcount_t refcount;
5834 };
5835
5836 void *
devlink_health_reporter_priv(struct devlink_health_reporter * reporter)5837 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
5838 {
5839 return reporter->priv;
5840 }
5841 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
5842
5843 static struct devlink_health_reporter *
__devlink_health_reporter_find_by_name(struct list_head * reporter_list,struct mutex * list_lock,const char * reporter_name)5844 __devlink_health_reporter_find_by_name(struct list_head *reporter_list,
5845 struct mutex *list_lock,
5846 const char *reporter_name)
5847 {
5848 struct devlink_health_reporter *reporter;
5849
5850 lockdep_assert_held(list_lock);
5851 list_for_each_entry(reporter, reporter_list, list)
5852 if (!strcmp(reporter->ops->name, reporter_name))
5853 return reporter;
5854 return NULL;
5855 }
5856
5857 static struct devlink_health_reporter *
devlink_health_reporter_find_by_name(struct devlink * devlink,const char * reporter_name)5858 devlink_health_reporter_find_by_name(struct devlink *devlink,
5859 const char *reporter_name)
5860 {
5861 return __devlink_health_reporter_find_by_name(&devlink->reporter_list,
5862 &devlink->reporters_lock,
5863 reporter_name);
5864 }
5865
5866 static struct devlink_health_reporter *
devlink_port_health_reporter_find_by_name(struct devlink_port * devlink_port,const char * reporter_name)5867 devlink_port_health_reporter_find_by_name(struct devlink_port *devlink_port,
5868 const char *reporter_name)
5869 {
5870 return __devlink_health_reporter_find_by_name(&devlink_port->reporter_list,
5871 &devlink_port->reporters_lock,
5872 reporter_name);
5873 }
5874
5875 static struct devlink_health_reporter *
__devlink_health_reporter_create(struct devlink * devlink,const struct devlink_health_reporter_ops * ops,u64 graceful_period,void * priv)5876 __devlink_health_reporter_create(struct devlink *devlink,
5877 const struct devlink_health_reporter_ops *ops,
5878 u64 graceful_period, void *priv)
5879 {
5880 struct devlink_health_reporter *reporter;
5881
5882 if (WARN_ON(graceful_period && !ops->recover))
5883 return ERR_PTR(-EINVAL);
5884
5885 reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
5886 if (!reporter)
5887 return ERR_PTR(-ENOMEM);
5888
5889 reporter->priv = priv;
5890 reporter->ops = ops;
5891 reporter->devlink = devlink;
5892 reporter->graceful_period = graceful_period;
5893 reporter->auto_recover = !!ops->recover;
5894 reporter->auto_dump = !!ops->dump;
5895 mutex_init(&reporter->dump_lock);
5896 refcount_set(&reporter->refcount, 1);
5897 return reporter;
5898 }
5899
5900 /**
5901 * devlink_port_health_reporter_create - create devlink health reporter for
5902 * specified port instance
5903 *
5904 * @port: devlink_port which should contain the new reporter
5905 * @ops: ops
5906 * @graceful_period: to avoid recovery loops, in msecs
5907 * @priv: priv
5908 */
5909 struct devlink_health_reporter *
devlink_port_health_reporter_create(struct devlink_port * port,const struct devlink_health_reporter_ops * ops,u64 graceful_period,void * priv)5910 devlink_port_health_reporter_create(struct devlink_port *port,
5911 const struct devlink_health_reporter_ops *ops,
5912 u64 graceful_period, void *priv)
5913 {
5914 struct devlink_health_reporter *reporter;
5915
5916 mutex_lock(&port->reporters_lock);
5917 if (__devlink_health_reporter_find_by_name(&port->reporter_list,
5918 &port->reporters_lock, ops->name)) {
5919 reporter = ERR_PTR(-EEXIST);
5920 goto unlock;
5921 }
5922
5923 reporter = __devlink_health_reporter_create(port->devlink, ops,
5924 graceful_period, priv);
5925 if (IS_ERR(reporter))
5926 goto unlock;
5927
5928 reporter->devlink_port = port;
5929 list_add_tail(&reporter->list, &port->reporter_list);
5930 unlock:
5931 mutex_unlock(&port->reporters_lock);
5932 return reporter;
5933 }
5934 EXPORT_SYMBOL_GPL(devlink_port_health_reporter_create);
5935
5936 /**
5937 * devlink_health_reporter_create - create devlink health reporter
5938 *
5939 * @devlink: devlink
5940 * @ops: ops
5941 * @graceful_period: to avoid recovery loops, in msecs
5942 * @priv: priv
5943 */
5944 struct devlink_health_reporter *
devlink_health_reporter_create(struct devlink * devlink,const struct devlink_health_reporter_ops * ops,u64 graceful_period,void * priv)5945 devlink_health_reporter_create(struct devlink *devlink,
5946 const struct devlink_health_reporter_ops *ops,
5947 u64 graceful_period, void *priv)
5948 {
5949 struct devlink_health_reporter *reporter;
5950
5951 mutex_lock(&devlink->reporters_lock);
5952 if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
5953 reporter = ERR_PTR(-EEXIST);
5954 goto unlock;
5955 }
5956
5957 reporter = __devlink_health_reporter_create(devlink, ops,
5958 graceful_period, priv);
5959 if (IS_ERR(reporter))
5960 goto unlock;
5961
5962 list_add_tail(&reporter->list, &devlink->reporter_list);
5963 unlock:
5964 mutex_unlock(&devlink->reporters_lock);
5965 return reporter;
5966 }
5967 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
5968
5969 static void
devlink_health_reporter_free(struct devlink_health_reporter * reporter)5970 devlink_health_reporter_free(struct devlink_health_reporter *reporter)
5971 {
5972 mutex_destroy(&reporter->dump_lock);
5973 if (reporter->dump_fmsg)
5974 devlink_fmsg_free(reporter->dump_fmsg);
5975 kfree(reporter);
5976 }
5977
5978 static void
devlink_health_reporter_put(struct devlink_health_reporter * reporter)5979 devlink_health_reporter_put(struct devlink_health_reporter *reporter)
5980 {
5981 if (refcount_dec_and_test(&reporter->refcount))
5982 devlink_health_reporter_free(reporter);
5983 }
5984
5985 static void
__devlink_health_reporter_destroy(struct devlink_health_reporter * reporter)5986 __devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
5987 {
5988 list_del(&reporter->list);
5989 devlink_health_reporter_put(reporter);
5990 }
5991
5992 /**
5993 * devlink_health_reporter_destroy - destroy devlink health reporter
5994 *
5995 * @reporter: devlink health reporter to destroy
5996 */
5997 void
devlink_health_reporter_destroy(struct devlink_health_reporter * reporter)5998 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
5999 {
6000 struct mutex *lock = &reporter->devlink->reporters_lock;
6001
6002 mutex_lock(lock);
6003 __devlink_health_reporter_destroy(reporter);
6004 mutex_unlock(lock);
6005 }
6006 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
6007
6008 /**
6009 * devlink_port_health_reporter_destroy - destroy devlink port health reporter
6010 *
6011 * @reporter: devlink health reporter to destroy
6012 */
6013 void
devlink_port_health_reporter_destroy(struct devlink_health_reporter * reporter)6014 devlink_port_health_reporter_destroy(struct devlink_health_reporter *reporter)
6015 {
6016 struct mutex *lock = &reporter->devlink_port->reporters_lock;
6017
6018 mutex_lock(lock);
6019 __devlink_health_reporter_destroy(reporter);
6020 mutex_unlock(lock);
6021 }
6022 EXPORT_SYMBOL_GPL(devlink_port_health_reporter_destroy);
6023
6024 static int
devlink_nl_health_reporter_fill(struct sk_buff * msg,struct devlink * devlink,struct devlink_health_reporter * reporter,enum devlink_command cmd,u32 portid,u32 seq,int flags)6025 devlink_nl_health_reporter_fill(struct sk_buff *msg,
6026 struct devlink *devlink,
6027 struct devlink_health_reporter *reporter,
6028 enum devlink_command cmd, u32 portid,
6029 u32 seq, int flags)
6030 {
6031 struct nlattr *reporter_attr;
6032 void *hdr;
6033
6034 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
6035 if (!hdr)
6036 return -EMSGSIZE;
6037
6038 if (devlink_nl_put_handle(msg, devlink))
6039 goto genlmsg_cancel;
6040
6041 if (reporter->devlink_port) {
6042 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, reporter->devlink_port->index))
6043 goto genlmsg_cancel;
6044 }
6045 reporter_attr = nla_nest_start_noflag(msg,
6046 DEVLINK_ATTR_HEALTH_REPORTER);
6047 if (!reporter_attr)
6048 goto genlmsg_cancel;
6049 if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
6050 reporter->ops->name))
6051 goto reporter_nest_cancel;
6052 if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
6053 reporter->health_state))
6054 goto reporter_nest_cancel;
6055 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
6056 reporter->error_count, DEVLINK_ATTR_PAD))
6057 goto reporter_nest_cancel;
6058 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
6059 reporter->recovery_count, DEVLINK_ATTR_PAD))
6060 goto reporter_nest_cancel;
6061 if (reporter->ops->recover &&
6062 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
6063 reporter->graceful_period,
6064 DEVLINK_ATTR_PAD))
6065 goto reporter_nest_cancel;
6066 if (reporter->ops->recover &&
6067 nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
6068 reporter->auto_recover))
6069 goto reporter_nest_cancel;
6070 if (reporter->dump_fmsg &&
6071 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
6072 jiffies_to_msecs(reporter->dump_ts),
6073 DEVLINK_ATTR_PAD))
6074 goto reporter_nest_cancel;
6075 if (reporter->dump_fmsg &&
6076 nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS,
6077 reporter->dump_real_ts, DEVLINK_ATTR_PAD))
6078 goto reporter_nest_cancel;
6079 if (reporter->ops->dump &&
6080 nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP,
6081 reporter->auto_dump))
6082 goto reporter_nest_cancel;
6083
6084 nla_nest_end(msg, reporter_attr);
6085 genlmsg_end(msg, hdr);
6086 return 0;
6087
6088 reporter_nest_cancel:
6089 nla_nest_end(msg, reporter_attr);
6090 genlmsg_cancel:
6091 genlmsg_cancel(msg, hdr);
6092 return -EMSGSIZE;
6093 }
6094
devlink_recover_notify(struct devlink_health_reporter * reporter,enum devlink_command cmd)6095 static void devlink_recover_notify(struct devlink_health_reporter *reporter,
6096 enum devlink_command cmd)
6097 {
6098 struct sk_buff *msg;
6099 int err;
6100
6101 WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
6102
6103 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6104 if (!msg)
6105 return;
6106
6107 err = devlink_nl_health_reporter_fill(msg, reporter->devlink,
6108 reporter, cmd, 0, 0, 0);
6109 if (err) {
6110 nlmsg_free(msg);
6111 return;
6112 }
6113
6114 genlmsg_multicast_netns(&devlink_nl_family,
6115 devlink_net(reporter->devlink),
6116 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
6117 }
6118
6119 void
devlink_health_reporter_recovery_done(struct devlink_health_reporter * reporter)6120 devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter)
6121 {
6122 reporter->recovery_count++;
6123 reporter->last_recovery_ts = jiffies;
6124 }
6125 EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done);
6126
6127 static int
devlink_health_reporter_recover(struct devlink_health_reporter * reporter,void * priv_ctx,struct netlink_ext_ack * extack)6128 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
6129 void *priv_ctx, struct netlink_ext_ack *extack)
6130 {
6131 int err;
6132
6133 if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
6134 return 0;
6135
6136 if (!reporter->ops->recover)
6137 return -EOPNOTSUPP;
6138
6139 err = reporter->ops->recover(reporter, priv_ctx, extack);
6140 if (err)
6141 return err;
6142
6143 devlink_health_reporter_recovery_done(reporter);
6144 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
6145 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
6146
6147 return 0;
6148 }
6149
6150 static void
devlink_health_dump_clear(struct devlink_health_reporter * reporter)6151 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
6152 {
6153 if (!reporter->dump_fmsg)
6154 return;
6155 devlink_fmsg_free(reporter->dump_fmsg);
6156 reporter->dump_fmsg = NULL;
6157 }
6158
devlink_health_do_dump(struct devlink_health_reporter * reporter,void * priv_ctx,struct netlink_ext_ack * extack)6159 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
6160 void *priv_ctx,
6161 struct netlink_ext_ack *extack)
6162 {
6163 int err;
6164
6165 if (!reporter->ops->dump)
6166 return 0;
6167
6168 if (reporter->dump_fmsg)
6169 return 0;
6170
6171 reporter->dump_fmsg = devlink_fmsg_alloc();
6172 if (!reporter->dump_fmsg) {
6173 err = -ENOMEM;
6174 return err;
6175 }
6176
6177 err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
6178 if (err)
6179 goto dump_err;
6180
6181 err = reporter->ops->dump(reporter, reporter->dump_fmsg,
6182 priv_ctx, extack);
6183 if (err)
6184 goto dump_err;
6185
6186 err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
6187 if (err)
6188 goto dump_err;
6189
6190 reporter->dump_ts = jiffies;
6191 reporter->dump_real_ts = ktime_get_real_ns();
6192
6193 return 0;
6194
6195 dump_err:
6196 devlink_health_dump_clear(reporter);
6197 return err;
6198 }
6199
devlink_health_report(struct devlink_health_reporter * reporter,const char * msg,void * priv_ctx)6200 int devlink_health_report(struct devlink_health_reporter *reporter,
6201 const char *msg, void *priv_ctx)
6202 {
6203 enum devlink_health_reporter_state prev_health_state;
6204 struct devlink *devlink = reporter->devlink;
6205 unsigned long recover_ts_threshold;
6206
6207 /* write a log message of the current error */
6208 WARN_ON(!msg);
6209 trace_devlink_health_report(devlink, reporter->ops->name, msg);
6210 reporter->error_count++;
6211 prev_health_state = reporter->health_state;
6212 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
6213 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
6214
6215 /* abort if the previous error wasn't recovered */
6216 recover_ts_threshold = reporter->last_recovery_ts +
6217 msecs_to_jiffies(reporter->graceful_period);
6218 if (reporter->auto_recover &&
6219 (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
6220 (reporter->last_recovery_ts && reporter->recovery_count &&
6221 time_is_after_jiffies(recover_ts_threshold)))) {
6222 trace_devlink_health_recover_aborted(devlink,
6223 reporter->ops->name,
6224 reporter->health_state,
6225 jiffies -
6226 reporter->last_recovery_ts);
6227 return -ECANCELED;
6228 }
6229
6230 reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
6231
6232 if (reporter->auto_dump) {
6233 mutex_lock(&reporter->dump_lock);
6234 /* store current dump of current error, for later analysis */
6235 devlink_health_do_dump(reporter, priv_ctx, NULL);
6236 mutex_unlock(&reporter->dump_lock);
6237 }
6238
6239 if (reporter->auto_recover)
6240 return devlink_health_reporter_recover(reporter,
6241 priv_ctx, NULL);
6242
6243 return 0;
6244 }
6245 EXPORT_SYMBOL_GPL(devlink_health_report);
6246
6247 static struct devlink_health_reporter *
devlink_health_reporter_get_from_attrs(struct devlink * devlink,struct nlattr ** attrs)6248 devlink_health_reporter_get_from_attrs(struct devlink *devlink,
6249 struct nlattr **attrs)
6250 {
6251 struct devlink_health_reporter *reporter;
6252 struct devlink_port *devlink_port;
6253 char *reporter_name;
6254
6255 if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
6256 return NULL;
6257
6258 reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
6259 devlink_port = devlink_port_get_from_attrs(devlink, attrs);
6260 if (IS_ERR(devlink_port)) {
6261 mutex_lock(&devlink->reporters_lock);
6262 reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
6263 if (reporter)
6264 refcount_inc(&reporter->refcount);
6265 mutex_unlock(&devlink->reporters_lock);
6266 } else {
6267 mutex_lock(&devlink_port->reporters_lock);
6268 reporter = devlink_port_health_reporter_find_by_name(devlink_port, reporter_name);
6269 if (reporter)
6270 refcount_inc(&reporter->refcount);
6271 mutex_unlock(&devlink_port->reporters_lock);
6272 }
6273
6274 return reporter;
6275 }
6276
6277 static struct devlink_health_reporter *
devlink_health_reporter_get_from_info(struct devlink * devlink,struct genl_info * info)6278 devlink_health_reporter_get_from_info(struct devlink *devlink,
6279 struct genl_info *info)
6280 {
6281 return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
6282 }
6283
6284 static struct devlink_health_reporter *
devlink_health_reporter_get_from_cb(struct netlink_callback * cb)6285 devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
6286 {
6287 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
6288 struct devlink_health_reporter *reporter;
6289 struct nlattr **attrs = info->attrs;
6290 struct devlink *devlink;
6291
6292 mutex_lock(&devlink_mutex);
6293 devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
6294 if (IS_ERR(devlink))
6295 goto unlock;
6296
6297 reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
6298 mutex_unlock(&devlink_mutex);
6299 return reporter;
6300 unlock:
6301 mutex_unlock(&devlink_mutex);
6302 return NULL;
6303 }
6304
6305 void
devlink_health_reporter_state_update(struct devlink_health_reporter * reporter,enum devlink_health_reporter_state state)6306 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
6307 enum devlink_health_reporter_state state)
6308 {
6309 if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
6310 state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
6311 return;
6312
6313 if (reporter->health_state == state)
6314 return;
6315
6316 reporter->health_state = state;
6317 trace_devlink_health_reporter_state_update(reporter->devlink,
6318 reporter->ops->name, state);
6319 devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
6320 }
6321 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
6322
devlink_nl_cmd_health_reporter_get_doit(struct sk_buff * skb,struct genl_info * info)6323 static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
6324 struct genl_info *info)
6325 {
6326 struct devlink *devlink = info->user_ptr[0];
6327 struct devlink_health_reporter *reporter;
6328 struct sk_buff *msg;
6329 int err;
6330
6331 reporter = devlink_health_reporter_get_from_info(devlink, info);
6332 if (!reporter)
6333 return -EINVAL;
6334
6335 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6336 if (!msg) {
6337 err = -ENOMEM;
6338 goto out;
6339 }
6340
6341 err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
6342 DEVLINK_CMD_HEALTH_REPORTER_GET,
6343 info->snd_portid, info->snd_seq,
6344 0);
6345 if (err) {
6346 nlmsg_free(msg);
6347 goto out;
6348 }
6349
6350 err = genlmsg_reply(msg, info);
6351 out:
6352 devlink_health_reporter_put(reporter);
6353 return err;
6354 }
6355
6356 static int
devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)6357 devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
6358 struct netlink_callback *cb)
6359 {
6360 struct devlink_health_reporter *reporter;
6361 struct devlink_port *port;
6362 struct devlink *devlink;
6363 int start = cb->args[0];
6364 int idx = 0;
6365 int err;
6366
6367 mutex_lock(&devlink_mutex);
6368 list_for_each_entry(devlink, &devlink_list, list) {
6369 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6370 continue;
6371 mutex_lock(&devlink->reporters_lock);
6372 list_for_each_entry(reporter, &devlink->reporter_list,
6373 list) {
6374 if (idx < start) {
6375 idx++;
6376 continue;
6377 }
6378 err = devlink_nl_health_reporter_fill(msg, devlink,
6379 reporter,
6380 DEVLINK_CMD_HEALTH_REPORTER_GET,
6381 NETLINK_CB(cb->skb).portid,
6382 cb->nlh->nlmsg_seq,
6383 NLM_F_MULTI);
6384 if (err) {
6385 mutex_unlock(&devlink->reporters_lock);
6386 goto out;
6387 }
6388 idx++;
6389 }
6390 mutex_unlock(&devlink->reporters_lock);
6391 }
6392
6393 list_for_each_entry(devlink, &devlink_list, list) {
6394 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6395 continue;
6396 mutex_lock(&devlink->lock);
6397 list_for_each_entry(port, &devlink->port_list, list) {
6398 mutex_lock(&port->reporters_lock);
6399 list_for_each_entry(reporter, &port->reporter_list, list) {
6400 if (idx < start) {
6401 idx++;
6402 continue;
6403 }
6404 err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
6405 DEVLINK_CMD_HEALTH_REPORTER_GET,
6406 NETLINK_CB(cb->skb).portid,
6407 cb->nlh->nlmsg_seq,
6408 NLM_F_MULTI);
6409 if (err) {
6410 mutex_unlock(&port->reporters_lock);
6411 mutex_unlock(&devlink->lock);
6412 goto out;
6413 }
6414 idx++;
6415 }
6416 mutex_unlock(&port->reporters_lock);
6417 }
6418 mutex_unlock(&devlink->lock);
6419 }
6420 out:
6421 mutex_unlock(&devlink_mutex);
6422
6423 cb->args[0] = idx;
6424 return msg->len;
6425 }
6426
6427 static int
devlink_nl_cmd_health_reporter_set_doit(struct sk_buff * skb,struct genl_info * info)6428 devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
6429 struct genl_info *info)
6430 {
6431 struct devlink *devlink = info->user_ptr[0];
6432 struct devlink_health_reporter *reporter;
6433 int err;
6434
6435 reporter = devlink_health_reporter_get_from_info(devlink, info);
6436 if (!reporter)
6437 return -EINVAL;
6438
6439 if (!reporter->ops->recover &&
6440 (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
6441 info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
6442 err = -EOPNOTSUPP;
6443 goto out;
6444 }
6445 if (!reporter->ops->dump &&
6446 info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]) {
6447 err = -EOPNOTSUPP;
6448 goto out;
6449 }
6450
6451 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
6452 reporter->graceful_period =
6453 nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
6454
6455 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
6456 reporter->auto_recover =
6457 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
6458
6459 if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
6460 reporter->auto_dump =
6461 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]);
6462
6463 devlink_health_reporter_put(reporter);
6464 return 0;
6465 out:
6466 devlink_health_reporter_put(reporter);
6467 return err;
6468 }
6469
devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff * skb,struct genl_info * info)6470 static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
6471 struct genl_info *info)
6472 {
6473 struct devlink *devlink = info->user_ptr[0];
6474 struct devlink_health_reporter *reporter;
6475 int err;
6476
6477 reporter = devlink_health_reporter_get_from_info(devlink, info);
6478 if (!reporter)
6479 return -EINVAL;
6480
6481 err = devlink_health_reporter_recover(reporter, NULL, info->extack);
6482
6483 devlink_health_reporter_put(reporter);
6484 return err;
6485 }
6486
devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff * skb,struct genl_info * info)6487 static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
6488 struct genl_info *info)
6489 {
6490 struct devlink *devlink = info->user_ptr[0];
6491 struct devlink_health_reporter *reporter;
6492 struct devlink_fmsg *fmsg;
6493 int err;
6494
6495 reporter = devlink_health_reporter_get_from_info(devlink, info);
6496 if (!reporter)
6497 return -EINVAL;
6498
6499 if (!reporter->ops->diagnose) {
6500 devlink_health_reporter_put(reporter);
6501 return -EOPNOTSUPP;
6502 }
6503
6504 fmsg = devlink_fmsg_alloc();
6505 if (!fmsg) {
6506 devlink_health_reporter_put(reporter);
6507 return -ENOMEM;
6508 }
6509
6510 err = devlink_fmsg_obj_nest_start(fmsg);
6511 if (err)
6512 goto out;
6513
6514 err = reporter->ops->diagnose(reporter, fmsg, info->extack);
6515 if (err)
6516 goto out;
6517
6518 err = devlink_fmsg_obj_nest_end(fmsg);
6519 if (err)
6520 goto out;
6521
6522 err = devlink_fmsg_snd(fmsg, info,
6523 DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
6524
6525 out:
6526 devlink_fmsg_free(fmsg);
6527 devlink_health_reporter_put(reporter);
6528 return err;
6529 }
6530
6531 static int
devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff * skb,struct netlink_callback * cb)6532 devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
6533 struct netlink_callback *cb)
6534 {
6535 struct devlink_health_reporter *reporter;
6536 u64 start = cb->args[0];
6537 int err;
6538
6539 reporter = devlink_health_reporter_get_from_cb(cb);
6540 if (!reporter)
6541 return -EINVAL;
6542
6543 if (!reporter->ops->dump) {
6544 err = -EOPNOTSUPP;
6545 goto out;
6546 }
6547 mutex_lock(&reporter->dump_lock);
6548 if (!start) {
6549 err = devlink_health_do_dump(reporter, NULL, cb->extack);
6550 if (err)
6551 goto unlock;
6552 cb->args[1] = reporter->dump_ts;
6553 }
6554 if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) {
6555 NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
6556 err = -EAGAIN;
6557 goto unlock;
6558 }
6559
6560 err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
6561 DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
6562 unlock:
6563 mutex_unlock(&reporter->dump_lock);
6564 out:
6565 devlink_health_reporter_put(reporter);
6566 return err;
6567 }
6568
6569 static int
devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff * skb,struct genl_info * info)6570 devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
6571 struct genl_info *info)
6572 {
6573 struct devlink *devlink = info->user_ptr[0];
6574 struct devlink_health_reporter *reporter;
6575
6576 reporter = devlink_health_reporter_get_from_info(devlink, info);
6577 if (!reporter)
6578 return -EINVAL;
6579
6580 if (!reporter->ops->dump) {
6581 devlink_health_reporter_put(reporter);
6582 return -EOPNOTSUPP;
6583 }
6584
6585 mutex_lock(&reporter->dump_lock);
6586 devlink_health_dump_clear(reporter);
6587 mutex_unlock(&reporter->dump_lock);
6588 devlink_health_reporter_put(reporter);
6589 return 0;
6590 }
6591
devlink_nl_cmd_health_reporter_test_doit(struct sk_buff * skb,struct genl_info * info)6592 static int devlink_nl_cmd_health_reporter_test_doit(struct sk_buff *skb,
6593 struct genl_info *info)
6594 {
6595 struct devlink *devlink = info->user_ptr[0];
6596 struct devlink_health_reporter *reporter;
6597 int err;
6598
6599 reporter = devlink_health_reporter_get_from_info(devlink, info);
6600 if (!reporter)
6601 return -EINVAL;
6602
6603 if (!reporter->ops->test) {
6604 devlink_health_reporter_put(reporter);
6605 return -EOPNOTSUPP;
6606 }
6607
6608 err = reporter->ops->test(reporter, info->extack);
6609
6610 devlink_health_reporter_put(reporter);
6611 return err;
6612 }
6613
6614 struct devlink_stats {
6615 u64 rx_bytes;
6616 u64 rx_packets;
6617 struct u64_stats_sync syncp;
6618 };
6619
6620 /**
6621 * struct devlink_trap_policer_item - Packet trap policer attributes.
6622 * @policer: Immutable packet trap policer attributes.
6623 * @rate: Rate in packets / sec.
6624 * @burst: Burst size in packets.
6625 * @list: trap_policer_list member.
6626 *
6627 * Describes packet trap policer attributes. Created by devlink during trap
6628 * policer registration.
6629 */
6630 struct devlink_trap_policer_item {
6631 const struct devlink_trap_policer *policer;
6632 u64 rate;
6633 u64 burst;
6634 struct list_head list;
6635 };
6636
6637 /**
6638 * struct devlink_trap_group_item - Packet trap group attributes.
6639 * @group: Immutable packet trap group attributes.
6640 * @policer_item: Associated policer item. Can be NULL.
6641 * @list: trap_group_list member.
6642 * @stats: Trap group statistics.
6643 *
6644 * Describes packet trap group attributes. Created by devlink during trap
6645 * group registration.
6646 */
6647 struct devlink_trap_group_item {
6648 const struct devlink_trap_group *group;
6649 struct devlink_trap_policer_item *policer_item;
6650 struct list_head list;
6651 struct devlink_stats __percpu *stats;
6652 };
6653
6654 /**
6655 * struct devlink_trap_item - Packet trap attributes.
6656 * @trap: Immutable packet trap attributes.
6657 * @group_item: Associated group item.
6658 * @list: trap_list member.
6659 * @action: Trap action.
6660 * @stats: Trap statistics.
6661 * @priv: Driver private information.
6662 *
6663 * Describes both mutable and immutable packet trap attributes. Created by
6664 * devlink during trap registration and used for all trap related operations.
6665 */
6666 struct devlink_trap_item {
6667 const struct devlink_trap *trap;
6668 struct devlink_trap_group_item *group_item;
6669 struct list_head list;
6670 enum devlink_trap_action action;
6671 struct devlink_stats __percpu *stats;
6672 void *priv;
6673 };
6674
6675 static struct devlink_trap_policer_item *
devlink_trap_policer_item_lookup(struct devlink * devlink,u32 id)6676 devlink_trap_policer_item_lookup(struct devlink *devlink, u32 id)
6677 {
6678 struct devlink_trap_policer_item *policer_item;
6679
6680 list_for_each_entry(policer_item, &devlink->trap_policer_list, list) {
6681 if (policer_item->policer->id == id)
6682 return policer_item;
6683 }
6684
6685 return NULL;
6686 }
6687
6688 static struct devlink_trap_item *
devlink_trap_item_lookup(struct devlink * devlink,const char * name)6689 devlink_trap_item_lookup(struct devlink *devlink, const char *name)
6690 {
6691 struct devlink_trap_item *trap_item;
6692
6693 list_for_each_entry(trap_item, &devlink->trap_list, list) {
6694 if (!strcmp(trap_item->trap->name, name))
6695 return trap_item;
6696 }
6697
6698 return NULL;
6699 }
6700
6701 static struct devlink_trap_item *
devlink_trap_item_get_from_info(struct devlink * devlink,struct genl_info * info)6702 devlink_trap_item_get_from_info(struct devlink *devlink,
6703 struct genl_info *info)
6704 {
6705 struct nlattr *attr;
6706
6707 if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
6708 return NULL;
6709 attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
6710
6711 return devlink_trap_item_lookup(devlink, nla_data(attr));
6712 }
6713
6714 static int
devlink_trap_action_get_from_info(struct genl_info * info,enum devlink_trap_action * p_trap_action)6715 devlink_trap_action_get_from_info(struct genl_info *info,
6716 enum devlink_trap_action *p_trap_action)
6717 {
6718 u8 val;
6719
6720 val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
6721 switch (val) {
6722 case DEVLINK_TRAP_ACTION_DROP:
6723 case DEVLINK_TRAP_ACTION_TRAP:
6724 case DEVLINK_TRAP_ACTION_MIRROR:
6725 *p_trap_action = val;
6726 break;
6727 default:
6728 return -EINVAL;
6729 }
6730
6731 return 0;
6732 }
6733
devlink_trap_metadata_put(struct sk_buff * msg,const struct devlink_trap * trap)6734 static int devlink_trap_metadata_put(struct sk_buff *msg,
6735 const struct devlink_trap *trap)
6736 {
6737 struct nlattr *attr;
6738
6739 attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
6740 if (!attr)
6741 return -EMSGSIZE;
6742
6743 if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
6744 nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
6745 goto nla_put_failure;
6746 if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE) &&
6747 nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_FA_COOKIE))
6748 goto nla_put_failure;
6749
6750 nla_nest_end(msg, attr);
6751
6752 return 0;
6753
6754 nla_put_failure:
6755 nla_nest_cancel(msg, attr);
6756 return -EMSGSIZE;
6757 }
6758
devlink_trap_stats_read(struct devlink_stats __percpu * trap_stats,struct devlink_stats * stats)6759 static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
6760 struct devlink_stats *stats)
6761 {
6762 int i;
6763
6764 memset(stats, 0, sizeof(*stats));
6765 for_each_possible_cpu(i) {
6766 struct devlink_stats *cpu_stats;
6767 u64 rx_packets, rx_bytes;
6768 unsigned int start;
6769
6770 cpu_stats = per_cpu_ptr(trap_stats, i);
6771 do {
6772 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
6773 rx_packets = cpu_stats->rx_packets;
6774 rx_bytes = cpu_stats->rx_bytes;
6775 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
6776
6777 stats->rx_packets += rx_packets;
6778 stats->rx_bytes += rx_bytes;
6779 }
6780 }
6781
devlink_trap_stats_put(struct sk_buff * msg,struct devlink_stats __percpu * trap_stats)6782 static int devlink_trap_stats_put(struct sk_buff *msg,
6783 struct devlink_stats __percpu *trap_stats)
6784 {
6785 struct devlink_stats stats;
6786 struct nlattr *attr;
6787
6788 devlink_trap_stats_read(trap_stats, &stats);
6789
6790 attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
6791 if (!attr)
6792 return -EMSGSIZE;
6793
6794 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
6795 stats.rx_packets, DEVLINK_ATTR_PAD))
6796 goto nla_put_failure;
6797
6798 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
6799 stats.rx_bytes, DEVLINK_ATTR_PAD))
6800 goto nla_put_failure;
6801
6802 nla_nest_end(msg, attr);
6803
6804 return 0;
6805
6806 nla_put_failure:
6807 nla_nest_cancel(msg, attr);
6808 return -EMSGSIZE;
6809 }
6810
devlink_nl_trap_fill(struct sk_buff * msg,struct devlink * devlink,const struct devlink_trap_item * trap_item,enum devlink_command cmd,u32 portid,u32 seq,int flags)6811 static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
6812 const struct devlink_trap_item *trap_item,
6813 enum devlink_command cmd, u32 portid, u32 seq,
6814 int flags)
6815 {
6816 struct devlink_trap_group_item *group_item = trap_item->group_item;
6817 void *hdr;
6818 int err;
6819
6820 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
6821 if (!hdr)
6822 return -EMSGSIZE;
6823
6824 if (devlink_nl_put_handle(msg, devlink))
6825 goto nla_put_failure;
6826
6827 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
6828 group_item->group->name))
6829 goto nla_put_failure;
6830
6831 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
6832 goto nla_put_failure;
6833
6834 if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
6835 goto nla_put_failure;
6836
6837 if (trap_item->trap->generic &&
6838 nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
6839 goto nla_put_failure;
6840
6841 if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
6842 goto nla_put_failure;
6843
6844 err = devlink_trap_metadata_put(msg, trap_item->trap);
6845 if (err)
6846 goto nla_put_failure;
6847
6848 err = devlink_trap_stats_put(msg, trap_item->stats);
6849 if (err)
6850 goto nla_put_failure;
6851
6852 genlmsg_end(msg, hdr);
6853
6854 return 0;
6855
6856 nla_put_failure:
6857 genlmsg_cancel(msg, hdr);
6858 return -EMSGSIZE;
6859 }
6860
devlink_nl_cmd_trap_get_doit(struct sk_buff * skb,struct genl_info * info)6861 static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
6862 struct genl_info *info)
6863 {
6864 struct netlink_ext_ack *extack = info->extack;
6865 struct devlink *devlink = info->user_ptr[0];
6866 struct devlink_trap_item *trap_item;
6867 struct sk_buff *msg;
6868 int err;
6869
6870 if (list_empty(&devlink->trap_list))
6871 return -EOPNOTSUPP;
6872
6873 trap_item = devlink_trap_item_get_from_info(devlink, info);
6874 if (!trap_item) {
6875 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
6876 return -ENOENT;
6877 }
6878
6879 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6880 if (!msg)
6881 return -ENOMEM;
6882
6883 err = devlink_nl_trap_fill(msg, devlink, trap_item,
6884 DEVLINK_CMD_TRAP_NEW, info->snd_portid,
6885 info->snd_seq, 0);
6886 if (err)
6887 goto err_trap_fill;
6888
6889 return genlmsg_reply(msg, info);
6890
6891 err_trap_fill:
6892 nlmsg_free(msg);
6893 return err;
6894 }
6895
devlink_nl_cmd_trap_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)6896 static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
6897 struct netlink_callback *cb)
6898 {
6899 struct devlink_trap_item *trap_item;
6900 struct devlink *devlink;
6901 int start = cb->args[0];
6902 int idx = 0;
6903 int err;
6904
6905 mutex_lock(&devlink_mutex);
6906 list_for_each_entry(devlink, &devlink_list, list) {
6907 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
6908 continue;
6909 mutex_lock(&devlink->lock);
6910 list_for_each_entry(trap_item, &devlink->trap_list, list) {
6911 if (idx < start) {
6912 idx++;
6913 continue;
6914 }
6915 err = devlink_nl_trap_fill(msg, devlink, trap_item,
6916 DEVLINK_CMD_TRAP_NEW,
6917 NETLINK_CB(cb->skb).portid,
6918 cb->nlh->nlmsg_seq,
6919 NLM_F_MULTI);
6920 if (err) {
6921 mutex_unlock(&devlink->lock);
6922 goto out;
6923 }
6924 idx++;
6925 }
6926 mutex_unlock(&devlink->lock);
6927 }
6928 out:
6929 mutex_unlock(&devlink_mutex);
6930
6931 cb->args[0] = idx;
6932 return msg->len;
6933 }
6934
__devlink_trap_action_set(struct devlink * devlink,struct devlink_trap_item * trap_item,enum devlink_trap_action trap_action,struct netlink_ext_ack * extack)6935 static int __devlink_trap_action_set(struct devlink *devlink,
6936 struct devlink_trap_item *trap_item,
6937 enum devlink_trap_action trap_action,
6938 struct netlink_ext_ack *extack)
6939 {
6940 int err;
6941
6942 if (trap_item->action != trap_action &&
6943 trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
6944 NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
6945 return 0;
6946 }
6947
6948 err = devlink->ops->trap_action_set(devlink, trap_item->trap,
6949 trap_action, extack);
6950 if (err)
6951 return err;
6952
6953 trap_item->action = trap_action;
6954
6955 return 0;
6956 }
6957
devlink_trap_action_set(struct devlink * devlink,struct devlink_trap_item * trap_item,struct genl_info * info)6958 static int devlink_trap_action_set(struct devlink *devlink,
6959 struct devlink_trap_item *trap_item,
6960 struct genl_info *info)
6961 {
6962 enum devlink_trap_action trap_action;
6963 int err;
6964
6965 if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
6966 return 0;
6967
6968 err = devlink_trap_action_get_from_info(info, &trap_action);
6969 if (err) {
6970 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
6971 return -EINVAL;
6972 }
6973
6974 return __devlink_trap_action_set(devlink, trap_item, trap_action,
6975 info->extack);
6976 }
6977
devlink_nl_cmd_trap_set_doit(struct sk_buff * skb,struct genl_info * info)6978 static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
6979 struct genl_info *info)
6980 {
6981 struct netlink_ext_ack *extack = info->extack;
6982 struct devlink *devlink = info->user_ptr[0];
6983 struct devlink_trap_item *trap_item;
6984 int err;
6985
6986 if (list_empty(&devlink->trap_list))
6987 return -EOPNOTSUPP;
6988
6989 trap_item = devlink_trap_item_get_from_info(devlink, info);
6990 if (!trap_item) {
6991 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
6992 return -ENOENT;
6993 }
6994
6995 err = devlink_trap_action_set(devlink, trap_item, info);
6996 if (err)
6997 return err;
6998
6999 return 0;
7000 }
7001
7002 static struct devlink_trap_group_item *
devlink_trap_group_item_lookup(struct devlink * devlink,const char * name)7003 devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
7004 {
7005 struct devlink_trap_group_item *group_item;
7006
7007 list_for_each_entry(group_item, &devlink->trap_group_list, list) {
7008 if (!strcmp(group_item->group->name, name))
7009 return group_item;
7010 }
7011
7012 return NULL;
7013 }
7014
7015 static struct devlink_trap_group_item *
devlink_trap_group_item_lookup_by_id(struct devlink * devlink,u16 id)7016 devlink_trap_group_item_lookup_by_id(struct devlink *devlink, u16 id)
7017 {
7018 struct devlink_trap_group_item *group_item;
7019
7020 list_for_each_entry(group_item, &devlink->trap_group_list, list) {
7021 if (group_item->group->id == id)
7022 return group_item;
7023 }
7024
7025 return NULL;
7026 }
7027
7028 static struct devlink_trap_group_item *
devlink_trap_group_item_get_from_info(struct devlink * devlink,struct genl_info * info)7029 devlink_trap_group_item_get_from_info(struct devlink *devlink,
7030 struct genl_info *info)
7031 {
7032 char *name;
7033
7034 if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
7035 return NULL;
7036 name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
7037
7038 return devlink_trap_group_item_lookup(devlink, name);
7039 }
7040
7041 static int
devlink_nl_trap_group_fill(struct sk_buff * msg,struct devlink * devlink,const struct devlink_trap_group_item * group_item,enum devlink_command cmd,u32 portid,u32 seq,int flags)7042 devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
7043 const struct devlink_trap_group_item *group_item,
7044 enum devlink_command cmd, u32 portid, u32 seq,
7045 int flags)
7046 {
7047 void *hdr;
7048 int err;
7049
7050 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
7051 if (!hdr)
7052 return -EMSGSIZE;
7053
7054 if (devlink_nl_put_handle(msg, devlink))
7055 goto nla_put_failure;
7056
7057 if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
7058 group_item->group->name))
7059 goto nla_put_failure;
7060
7061 if (group_item->group->generic &&
7062 nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
7063 goto nla_put_failure;
7064
7065 if (group_item->policer_item &&
7066 nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
7067 group_item->policer_item->policer->id))
7068 goto nla_put_failure;
7069
7070 err = devlink_trap_stats_put(msg, group_item->stats);
7071 if (err)
7072 goto nla_put_failure;
7073
7074 genlmsg_end(msg, hdr);
7075
7076 return 0;
7077
7078 nla_put_failure:
7079 genlmsg_cancel(msg, hdr);
7080 return -EMSGSIZE;
7081 }
7082
devlink_nl_cmd_trap_group_get_doit(struct sk_buff * skb,struct genl_info * info)7083 static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
7084 struct genl_info *info)
7085 {
7086 struct netlink_ext_ack *extack = info->extack;
7087 struct devlink *devlink = info->user_ptr[0];
7088 struct devlink_trap_group_item *group_item;
7089 struct sk_buff *msg;
7090 int err;
7091
7092 if (list_empty(&devlink->trap_group_list))
7093 return -EOPNOTSUPP;
7094
7095 group_item = devlink_trap_group_item_get_from_info(devlink, info);
7096 if (!group_item) {
7097 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
7098 return -ENOENT;
7099 }
7100
7101 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7102 if (!msg)
7103 return -ENOMEM;
7104
7105 err = devlink_nl_trap_group_fill(msg, devlink, group_item,
7106 DEVLINK_CMD_TRAP_GROUP_NEW,
7107 info->snd_portid, info->snd_seq, 0);
7108 if (err)
7109 goto err_trap_group_fill;
7110
7111 return genlmsg_reply(msg, info);
7112
7113 err_trap_group_fill:
7114 nlmsg_free(msg);
7115 return err;
7116 }
7117
devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)7118 static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
7119 struct netlink_callback *cb)
7120 {
7121 enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
7122 struct devlink_trap_group_item *group_item;
7123 u32 portid = NETLINK_CB(cb->skb).portid;
7124 struct devlink *devlink;
7125 int start = cb->args[0];
7126 int idx = 0;
7127 int err;
7128
7129 mutex_lock(&devlink_mutex);
7130 list_for_each_entry(devlink, &devlink_list, list) {
7131 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
7132 continue;
7133 mutex_lock(&devlink->lock);
7134 list_for_each_entry(group_item, &devlink->trap_group_list,
7135 list) {
7136 if (idx < start) {
7137 idx++;
7138 continue;
7139 }
7140 err = devlink_nl_trap_group_fill(msg, devlink,
7141 group_item, cmd,
7142 portid,
7143 cb->nlh->nlmsg_seq,
7144 NLM_F_MULTI);
7145 if (err) {
7146 mutex_unlock(&devlink->lock);
7147 goto out;
7148 }
7149 idx++;
7150 }
7151 mutex_unlock(&devlink->lock);
7152 }
7153 out:
7154 mutex_unlock(&devlink_mutex);
7155
7156 cb->args[0] = idx;
7157 return msg->len;
7158 }
7159
7160 static int
__devlink_trap_group_action_set(struct devlink * devlink,struct devlink_trap_group_item * group_item,enum devlink_trap_action trap_action,struct netlink_ext_ack * extack)7161 __devlink_trap_group_action_set(struct devlink *devlink,
7162 struct devlink_trap_group_item *group_item,
7163 enum devlink_trap_action trap_action,
7164 struct netlink_ext_ack *extack)
7165 {
7166 const char *group_name = group_item->group->name;
7167 struct devlink_trap_item *trap_item;
7168 int err;
7169
7170 if (devlink->ops->trap_group_action_set) {
7171 err = devlink->ops->trap_group_action_set(devlink, group_item->group,
7172 trap_action, extack);
7173 if (err)
7174 return err;
7175
7176 list_for_each_entry(trap_item, &devlink->trap_list, list) {
7177 if (strcmp(trap_item->group_item->group->name, group_name))
7178 continue;
7179 if (trap_item->action != trap_action &&
7180 trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP)
7181 continue;
7182 trap_item->action = trap_action;
7183 }
7184
7185 return 0;
7186 }
7187
7188 list_for_each_entry(trap_item, &devlink->trap_list, list) {
7189 if (strcmp(trap_item->group_item->group->name, group_name))
7190 continue;
7191 err = __devlink_trap_action_set(devlink, trap_item,
7192 trap_action, extack);
7193 if (err)
7194 return err;
7195 }
7196
7197 return 0;
7198 }
7199
7200 static int
devlink_trap_group_action_set(struct devlink * devlink,struct devlink_trap_group_item * group_item,struct genl_info * info,bool * p_modified)7201 devlink_trap_group_action_set(struct devlink *devlink,
7202 struct devlink_trap_group_item *group_item,
7203 struct genl_info *info, bool *p_modified)
7204 {
7205 enum devlink_trap_action trap_action;
7206 int err;
7207
7208 if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
7209 return 0;
7210
7211 err = devlink_trap_action_get_from_info(info, &trap_action);
7212 if (err) {
7213 NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
7214 return -EINVAL;
7215 }
7216
7217 err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
7218 info->extack);
7219 if (err)
7220 return err;
7221
7222 *p_modified = true;
7223
7224 return 0;
7225 }
7226
devlink_trap_group_set(struct devlink * devlink,struct devlink_trap_group_item * group_item,struct genl_info * info)7227 static int devlink_trap_group_set(struct devlink *devlink,
7228 struct devlink_trap_group_item *group_item,
7229 struct genl_info *info)
7230 {
7231 struct devlink_trap_policer_item *policer_item;
7232 struct netlink_ext_ack *extack = info->extack;
7233 const struct devlink_trap_policer *policer;
7234 struct nlattr **attrs = info->attrs;
7235 int err;
7236
7237 if (!attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
7238 return 0;
7239
7240 if (!devlink->ops->trap_group_set)
7241 return -EOPNOTSUPP;
7242
7243 policer_item = group_item->policer_item;
7244 if (attrs[DEVLINK_ATTR_TRAP_POLICER_ID]) {
7245 u32 policer_id;
7246
7247 policer_id = nla_get_u32(attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
7248 policer_item = devlink_trap_policer_item_lookup(devlink,
7249 policer_id);
7250 if (policer_id && !policer_item) {
7251 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
7252 return -ENOENT;
7253 }
7254 }
7255 policer = policer_item ? policer_item->policer : NULL;
7256
7257 err = devlink->ops->trap_group_set(devlink, group_item->group, policer,
7258 extack);
7259 if (err)
7260 return err;
7261
7262 group_item->policer_item = policer_item;
7263
7264 return 0;
7265 }
7266
devlink_nl_cmd_trap_group_set_doit(struct sk_buff * skb,struct genl_info * info)7267 static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
7268 struct genl_info *info)
7269 {
7270 struct netlink_ext_ack *extack = info->extack;
7271 struct devlink *devlink = info->user_ptr[0];
7272 struct devlink_trap_group_item *group_item;
7273 bool modified = false;
7274 int err;
7275
7276 if (list_empty(&devlink->trap_group_list))
7277 return -EOPNOTSUPP;
7278
7279 group_item = devlink_trap_group_item_get_from_info(devlink, info);
7280 if (!group_item) {
7281 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
7282 return -ENOENT;
7283 }
7284
7285 err = devlink_trap_group_action_set(devlink, group_item, info,
7286 &modified);
7287 if (err)
7288 return err;
7289
7290 err = devlink_trap_group_set(devlink, group_item, info);
7291 if (err)
7292 goto err_trap_group_set;
7293
7294 return 0;
7295
7296 err_trap_group_set:
7297 if (modified)
7298 NL_SET_ERR_MSG_MOD(extack, "Trap group set failed, but some changes were committed already");
7299 return err;
7300 }
7301
7302 static struct devlink_trap_policer_item *
devlink_trap_policer_item_get_from_info(struct devlink * devlink,struct genl_info * info)7303 devlink_trap_policer_item_get_from_info(struct devlink *devlink,
7304 struct genl_info *info)
7305 {
7306 u32 id;
7307
7308 if (!info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID])
7309 return NULL;
7310 id = nla_get_u32(info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID]);
7311
7312 return devlink_trap_policer_item_lookup(devlink, id);
7313 }
7314
7315 static int
devlink_trap_policer_stats_put(struct sk_buff * msg,struct devlink * devlink,const struct devlink_trap_policer * policer)7316 devlink_trap_policer_stats_put(struct sk_buff *msg, struct devlink *devlink,
7317 const struct devlink_trap_policer *policer)
7318 {
7319 struct nlattr *attr;
7320 u64 drops;
7321 int err;
7322
7323 if (!devlink->ops->trap_policer_counter_get)
7324 return 0;
7325
7326 err = devlink->ops->trap_policer_counter_get(devlink, policer, &drops);
7327 if (err)
7328 return err;
7329
7330 attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
7331 if (!attr)
7332 return -EMSGSIZE;
7333
7334 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops,
7335 DEVLINK_ATTR_PAD))
7336 goto nla_put_failure;
7337
7338 nla_nest_end(msg, attr);
7339
7340 return 0;
7341
7342 nla_put_failure:
7343 nla_nest_cancel(msg, attr);
7344 return -EMSGSIZE;
7345 }
7346
7347 static int
devlink_nl_trap_policer_fill(struct sk_buff * msg,struct devlink * devlink,const struct devlink_trap_policer_item * policer_item,enum devlink_command cmd,u32 portid,u32 seq,int flags)7348 devlink_nl_trap_policer_fill(struct sk_buff *msg, struct devlink *devlink,
7349 const struct devlink_trap_policer_item *policer_item,
7350 enum devlink_command cmd, u32 portid, u32 seq,
7351 int flags)
7352 {
7353 void *hdr;
7354 int err;
7355
7356 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
7357 if (!hdr)
7358 return -EMSGSIZE;
7359
7360 if (devlink_nl_put_handle(msg, devlink))
7361 goto nla_put_failure;
7362
7363 if (nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID,
7364 policer_item->policer->id))
7365 goto nla_put_failure;
7366
7367 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_RATE,
7368 policer_item->rate, DEVLINK_ATTR_PAD))
7369 goto nla_put_failure;
7370
7371 if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_BURST,
7372 policer_item->burst, DEVLINK_ATTR_PAD))
7373 goto nla_put_failure;
7374
7375 err = devlink_trap_policer_stats_put(msg, devlink,
7376 policer_item->policer);
7377 if (err)
7378 goto nla_put_failure;
7379
7380 genlmsg_end(msg, hdr);
7381
7382 return 0;
7383
7384 nla_put_failure:
7385 genlmsg_cancel(msg, hdr);
7386 return -EMSGSIZE;
7387 }
7388
devlink_nl_cmd_trap_policer_get_doit(struct sk_buff * skb,struct genl_info * info)7389 static int devlink_nl_cmd_trap_policer_get_doit(struct sk_buff *skb,
7390 struct genl_info *info)
7391 {
7392 struct devlink_trap_policer_item *policer_item;
7393 struct netlink_ext_ack *extack = info->extack;
7394 struct devlink *devlink = info->user_ptr[0];
7395 struct sk_buff *msg;
7396 int err;
7397
7398 if (list_empty(&devlink->trap_policer_list))
7399 return -EOPNOTSUPP;
7400
7401 policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
7402 if (!policer_item) {
7403 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
7404 return -ENOENT;
7405 }
7406
7407 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7408 if (!msg)
7409 return -ENOMEM;
7410
7411 err = devlink_nl_trap_policer_fill(msg, devlink, policer_item,
7412 DEVLINK_CMD_TRAP_POLICER_NEW,
7413 info->snd_portid, info->snd_seq, 0);
7414 if (err)
7415 goto err_trap_policer_fill;
7416
7417 return genlmsg_reply(msg, info);
7418
7419 err_trap_policer_fill:
7420 nlmsg_free(msg);
7421 return err;
7422 }
7423
devlink_nl_cmd_trap_policer_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)7424 static int devlink_nl_cmd_trap_policer_get_dumpit(struct sk_buff *msg,
7425 struct netlink_callback *cb)
7426 {
7427 enum devlink_command cmd = DEVLINK_CMD_TRAP_POLICER_NEW;
7428 struct devlink_trap_policer_item *policer_item;
7429 u32 portid = NETLINK_CB(cb->skb).portid;
7430 struct devlink *devlink;
7431 int start = cb->args[0];
7432 int idx = 0;
7433 int err;
7434
7435 mutex_lock(&devlink_mutex);
7436 list_for_each_entry(devlink, &devlink_list, list) {
7437 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
7438 continue;
7439 mutex_lock(&devlink->lock);
7440 list_for_each_entry(policer_item, &devlink->trap_policer_list,
7441 list) {
7442 if (idx < start) {
7443 idx++;
7444 continue;
7445 }
7446 err = devlink_nl_trap_policer_fill(msg, devlink,
7447 policer_item, cmd,
7448 portid,
7449 cb->nlh->nlmsg_seq,
7450 NLM_F_MULTI);
7451 if (err) {
7452 mutex_unlock(&devlink->lock);
7453 goto out;
7454 }
7455 idx++;
7456 }
7457 mutex_unlock(&devlink->lock);
7458 }
7459 out:
7460 mutex_unlock(&devlink_mutex);
7461
7462 cb->args[0] = idx;
7463 return msg->len;
7464 }
7465
7466 static int
devlink_trap_policer_set(struct devlink * devlink,struct devlink_trap_policer_item * policer_item,struct genl_info * info)7467 devlink_trap_policer_set(struct devlink *devlink,
7468 struct devlink_trap_policer_item *policer_item,
7469 struct genl_info *info)
7470 {
7471 struct netlink_ext_ack *extack = info->extack;
7472 struct nlattr **attrs = info->attrs;
7473 u64 rate, burst;
7474 int err;
7475
7476 rate = policer_item->rate;
7477 burst = policer_item->burst;
7478
7479 if (attrs[DEVLINK_ATTR_TRAP_POLICER_RATE])
7480 rate = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_RATE]);
7481
7482 if (attrs[DEVLINK_ATTR_TRAP_POLICER_BURST])
7483 burst = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_BURST]);
7484
7485 if (rate < policer_item->policer->min_rate) {
7486 NL_SET_ERR_MSG_MOD(extack, "Policer rate lower than limit");
7487 return -EINVAL;
7488 }
7489
7490 if (rate > policer_item->policer->max_rate) {
7491 NL_SET_ERR_MSG_MOD(extack, "Policer rate higher than limit");
7492 return -EINVAL;
7493 }
7494
7495 if (burst < policer_item->policer->min_burst) {
7496 NL_SET_ERR_MSG_MOD(extack, "Policer burst size lower than limit");
7497 return -EINVAL;
7498 }
7499
7500 if (burst > policer_item->policer->max_burst) {
7501 NL_SET_ERR_MSG_MOD(extack, "Policer burst size higher than limit");
7502 return -EINVAL;
7503 }
7504
7505 err = devlink->ops->trap_policer_set(devlink, policer_item->policer,
7506 rate, burst, info->extack);
7507 if (err)
7508 return err;
7509
7510 policer_item->rate = rate;
7511 policer_item->burst = burst;
7512
7513 return 0;
7514 }
7515
devlink_nl_cmd_trap_policer_set_doit(struct sk_buff * skb,struct genl_info * info)7516 static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
7517 struct genl_info *info)
7518 {
7519 struct devlink_trap_policer_item *policer_item;
7520 struct netlink_ext_ack *extack = info->extack;
7521 struct devlink *devlink = info->user_ptr[0];
7522
7523 if (list_empty(&devlink->trap_policer_list))
7524 return -EOPNOTSUPP;
7525
7526 if (!devlink->ops->trap_policer_set)
7527 return -EOPNOTSUPP;
7528
7529 policer_item = devlink_trap_policer_item_get_from_info(devlink, info);
7530 if (!policer_item) {
7531 NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap policer");
7532 return -ENOENT;
7533 }
7534
7535 return devlink_trap_policer_set(devlink, policer_item, info);
7536 }
7537
7538 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
7539 [DEVLINK_ATTR_UNSPEC] = { .strict_start_type =
7540 DEVLINK_ATTR_TRAP_POLICER_ID },
7541 [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
7542 [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
7543 [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
7544 [DEVLINK_ATTR_PORT_TYPE] = NLA_POLICY_RANGE(NLA_U16, DEVLINK_PORT_TYPE_AUTO,
7545 DEVLINK_PORT_TYPE_IB),
7546 [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
7547 [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
7548 [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
7549 [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
7550 [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
7551 [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
7552 [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
7553 [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
7554 [DEVLINK_ATTR_ESWITCH_MODE] = NLA_POLICY_RANGE(NLA_U16, DEVLINK_ESWITCH_MODE_LEGACY,
7555 DEVLINK_ESWITCH_MODE_SWITCHDEV),
7556 [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
7557 [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
7558 [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
7559 [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
7560 [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
7561 [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
7562 [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
7563 [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
7564 [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
7565 [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
7566 [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
7567 [DEVLINK_ATTR_REGION_CHUNK_ADDR] = { .type = NLA_U64 },
7568 [DEVLINK_ATTR_REGION_CHUNK_LEN] = { .type = NLA_U64 },
7569 [DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
7570 [DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
7571 [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
7572 [DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
7573 [DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
7574 [DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK] =
7575 NLA_POLICY_BITFIELD32(DEVLINK_SUPPORTED_FLASH_OVERWRITE_SECTIONS),
7576 [DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
7577 [DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
7578 [DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
7579 [DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 },
7580 [DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 },
7581 [DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 },
7582 [DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP] = { .type = NLA_U8 },
7583 [DEVLINK_ATTR_TRAP_POLICER_ID] = { .type = NLA_U32 },
7584 [DEVLINK_ATTR_TRAP_POLICER_RATE] = { .type = NLA_U64 },
7585 [DEVLINK_ATTR_TRAP_POLICER_BURST] = { .type = NLA_U64 },
7586 [DEVLINK_ATTR_PORT_FUNCTION] = { .type = NLA_NESTED },
7587 [DEVLINK_ATTR_RELOAD_ACTION] = NLA_POLICY_RANGE(NLA_U8, DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
7588 DEVLINK_RELOAD_ACTION_MAX),
7589 [DEVLINK_ATTR_RELOAD_LIMITS] = NLA_POLICY_BITFIELD32(DEVLINK_RELOAD_LIMITS_VALID_MASK),
7590 };
7591
7592 static const struct genl_small_ops devlink_nl_ops[] = {
7593 {
7594 .cmd = DEVLINK_CMD_GET,
7595 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7596 .doit = devlink_nl_cmd_get_doit,
7597 .dumpit = devlink_nl_cmd_get_dumpit,
7598 /* can be retrieved by unprivileged users */
7599 },
7600 {
7601 .cmd = DEVLINK_CMD_PORT_GET,
7602 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7603 .doit = devlink_nl_cmd_port_get_doit,
7604 .dumpit = devlink_nl_cmd_port_get_dumpit,
7605 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
7606 /* can be retrieved by unprivileged users */
7607 },
7608 {
7609 .cmd = DEVLINK_CMD_PORT_SET,
7610 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7611 .doit = devlink_nl_cmd_port_set_doit,
7612 .flags = GENL_ADMIN_PERM,
7613 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
7614 },
7615 {
7616 .cmd = DEVLINK_CMD_PORT_SPLIT,
7617 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7618 .doit = devlink_nl_cmd_port_split_doit,
7619 .flags = GENL_ADMIN_PERM,
7620 .internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
7621 },
7622 {
7623 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
7624 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7625 .doit = devlink_nl_cmd_port_unsplit_doit,
7626 .flags = GENL_ADMIN_PERM,
7627 .internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
7628 },
7629 {
7630 .cmd = DEVLINK_CMD_SB_GET,
7631 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7632 .doit = devlink_nl_cmd_sb_get_doit,
7633 .dumpit = devlink_nl_cmd_sb_get_dumpit,
7634 /* can be retrieved by unprivileged users */
7635 },
7636 {
7637 .cmd = DEVLINK_CMD_SB_POOL_GET,
7638 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7639 .doit = devlink_nl_cmd_sb_pool_get_doit,
7640 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
7641 /* can be retrieved by unprivileged users */
7642 },
7643 {
7644 .cmd = DEVLINK_CMD_SB_POOL_SET,
7645 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7646 .doit = devlink_nl_cmd_sb_pool_set_doit,
7647 .flags = GENL_ADMIN_PERM,
7648 },
7649 {
7650 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
7651 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7652 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
7653 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
7654 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
7655 /* can be retrieved by unprivileged users */
7656 },
7657 {
7658 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
7659 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7660 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
7661 .flags = GENL_ADMIN_PERM,
7662 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
7663 },
7664 {
7665 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
7666 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7667 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
7668 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
7669 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
7670 /* can be retrieved by unprivileged users */
7671 },
7672 {
7673 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
7674 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7675 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
7676 .flags = GENL_ADMIN_PERM,
7677 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
7678 },
7679 {
7680 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
7681 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7682 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
7683 .flags = GENL_ADMIN_PERM,
7684 },
7685 {
7686 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
7687 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7688 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
7689 .flags = GENL_ADMIN_PERM,
7690 },
7691 {
7692 .cmd = DEVLINK_CMD_ESWITCH_GET,
7693 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7694 .doit = devlink_nl_cmd_eswitch_get_doit,
7695 .flags = GENL_ADMIN_PERM,
7696 .internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
7697 },
7698 {
7699 .cmd = DEVLINK_CMD_ESWITCH_SET,
7700 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7701 .doit = devlink_nl_cmd_eswitch_set_doit,
7702 .flags = GENL_ADMIN_PERM,
7703 .internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
7704 },
7705 {
7706 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
7707 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7708 .doit = devlink_nl_cmd_dpipe_table_get,
7709 /* can be retrieved by unprivileged users */
7710 },
7711 {
7712 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
7713 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7714 .doit = devlink_nl_cmd_dpipe_entries_get,
7715 /* can be retrieved by unprivileged users */
7716 },
7717 {
7718 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
7719 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7720 .doit = devlink_nl_cmd_dpipe_headers_get,
7721 /* can be retrieved by unprivileged users */
7722 },
7723 {
7724 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
7725 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7726 .doit = devlink_nl_cmd_dpipe_table_counters_set,
7727 .flags = GENL_ADMIN_PERM,
7728 },
7729 {
7730 .cmd = DEVLINK_CMD_RESOURCE_SET,
7731 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7732 .doit = devlink_nl_cmd_resource_set,
7733 .flags = GENL_ADMIN_PERM,
7734 },
7735 {
7736 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
7737 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7738 .doit = devlink_nl_cmd_resource_dump,
7739 /* can be retrieved by unprivileged users */
7740 },
7741 {
7742 .cmd = DEVLINK_CMD_RELOAD,
7743 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7744 .doit = devlink_nl_cmd_reload,
7745 .flags = GENL_ADMIN_PERM,
7746 .internal_flags = DEVLINK_NL_FLAG_NO_LOCK,
7747 },
7748 {
7749 .cmd = DEVLINK_CMD_PARAM_GET,
7750 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7751 .doit = devlink_nl_cmd_param_get_doit,
7752 .dumpit = devlink_nl_cmd_param_get_dumpit,
7753 /* can be retrieved by unprivileged users */
7754 },
7755 {
7756 .cmd = DEVLINK_CMD_PARAM_SET,
7757 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7758 .doit = devlink_nl_cmd_param_set_doit,
7759 .flags = GENL_ADMIN_PERM,
7760 },
7761 {
7762 .cmd = DEVLINK_CMD_PORT_PARAM_GET,
7763 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7764 .doit = devlink_nl_cmd_port_param_get_doit,
7765 .dumpit = devlink_nl_cmd_port_param_get_dumpit,
7766 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
7767 /* can be retrieved by unprivileged users */
7768 },
7769 {
7770 .cmd = DEVLINK_CMD_PORT_PARAM_SET,
7771 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7772 .doit = devlink_nl_cmd_port_param_set_doit,
7773 .flags = GENL_ADMIN_PERM,
7774 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
7775 },
7776 {
7777 .cmd = DEVLINK_CMD_REGION_GET,
7778 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7779 .doit = devlink_nl_cmd_region_get_doit,
7780 .dumpit = devlink_nl_cmd_region_get_dumpit,
7781 .flags = GENL_ADMIN_PERM,
7782 },
7783 {
7784 .cmd = DEVLINK_CMD_REGION_NEW,
7785 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7786 .doit = devlink_nl_cmd_region_new,
7787 .flags = GENL_ADMIN_PERM,
7788 },
7789 {
7790 .cmd = DEVLINK_CMD_REGION_DEL,
7791 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7792 .doit = devlink_nl_cmd_region_del,
7793 .flags = GENL_ADMIN_PERM,
7794 },
7795 {
7796 .cmd = DEVLINK_CMD_REGION_READ,
7797 .validate = GENL_DONT_VALIDATE_STRICT |
7798 GENL_DONT_VALIDATE_DUMP_STRICT,
7799 .dumpit = devlink_nl_cmd_region_read_dumpit,
7800 .flags = GENL_ADMIN_PERM,
7801 },
7802 {
7803 .cmd = DEVLINK_CMD_INFO_GET,
7804 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7805 .doit = devlink_nl_cmd_info_get_doit,
7806 .dumpit = devlink_nl_cmd_info_get_dumpit,
7807 /* can be retrieved by unprivileged users */
7808 },
7809 {
7810 .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
7811 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7812 .doit = devlink_nl_cmd_health_reporter_get_doit,
7813 .dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
7814 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
7815 DEVLINK_NL_FLAG_NO_LOCK,
7816 /* can be retrieved by unprivileged users */
7817 },
7818 {
7819 .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
7820 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7821 .doit = devlink_nl_cmd_health_reporter_set_doit,
7822 .flags = GENL_ADMIN_PERM,
7823 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
7824 DEVLINK_NL_FLAG_NO_LOCK,
7825 },
7826 {
7827 .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
7828 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7829 .doit = devlink_nl_cmd_health_reporter_recover_doit,
7830 .flags = GENL_ADMIN_PERM,
7831 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
7832 DEVLINK_NL_FLAG_NO_LOCK,
7833 },
7834 {
7835 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
7836 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7837 .doit = devlink_nl_cmd_health_reporter_diagnose_doit,
7838 .flags = GENL_ADMIN_PERM,
7839 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
7840 DEVLINK_NL_FLAG_NO_LOCK,
7841 },
7842 {
7843 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
7844 .validate = GENL_DONT_VALIDATE_STRICT |
7845 GENL_DONT_VALIDATE_DUMP_STRICT,
7846 .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
7847 .flags = GENL_ADMIN_PERM,
7848 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
7849 DEVLINK_NL_FLAG_NO_LOCK,
7850 },
7851 {
7852 .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
7853 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7854 .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
7855 .flags = GENL_ADMIN_PERM,
7856 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
7857 DEVLINK_NL_FLAG_NO_LOCK,
7858 },
7859 {
7860 .cmd = DEVLINK_CMD_HEALTH_REPORTER_TEST,
7861 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7862 .doit = devlink_nl_cmd_health_reporter_test_doit,
7863 .flags = GENL_ADMIN_PERM,
7864 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT |
7865 DEVLINK_NL_FLAG_NO_LOCK,
7866 },
7867 {
7868 .cmd = DEVLINK_CMD_FLASH_UPDATE,
7869 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
7870 .doit = devlink_nl_cmd_flash_update,
7871 .flags = GENL_ADMIN_PERM,
7872 },
7873 {
7874 .cmd = DEVLINK_CMD_TRAP_GET,
7875 .doit = devlink_nl_cmd_trap_get_doit,
7876 .dumpit = devlink_nl_cmd_trap_get_dumpit,
7877 /* can be retrieved by unprivileged users */
7878 },
7879 {
7880 .cmd = DEVLINK_CMD_TRAP_SET,
7881 .doit = devlink_nl_cmd_trap_set_doit,
7882 .flags = GENL_ADMIN_PERM,
7883 },
7884 {
7885 .cmd = DEVLINK_CMD_TRAP_GROUP_GET,
7886 .doit = devlink_nl_cmd_trap_group_get_doit,
7887 .dumpit = devlink_nl_cmd_trap_group_get_dumpit,
7888 /* can be retrieved by unprivileged users */
7889 },
7890 {
7891 .cmd = DEVLINK_CMD_TRAP_GROUP_SET,
7892 .doit = devlink_nl_cmd_trap_group_set_doit,
7893 .flags = GENL_ADMIN_PERM,
7894 },
7895 {
7896 .cmd = DEVLINK_CMD_TRAP_POLICER_GET,
7897 .doit = devlink_nl_cmd_trap_policer_get_doit,
7898 .dumpit = devlink_nl_cmd_trap_policer_get_dumpit,
7899 /* can be retrieved by unprivileged users */
7900 },
7901 {
7902 .cmd = DEVLINK_CMD_TRAP_POLICER_SET,
7903 .doit = devlink_nl_cmd_trap_policer_set_doit,
7904 .flags = GENL_ADMIN_PERM,
7905 },
7906 };
7907
7908 static struct genl_family devlink_nl_family __ro_after_init = {
7909 .name = DEVLINK_GENL_NAME,
7910 .version = DEVLINK_GENL_VERSION,
7911 .maxattr = DEVLINK_ATTR_MAX,
7912 .policy = devlink_nl_policy,
7913 .netnsok = true,
7914 .pre_doit = devlink_nl_pre_doit,
7915 .post_doit = devlink_nl_post_doit,
7916 .module = THIS_MODULE,
7917 .small_ops = devlink_nl_ops,
7918 .n_small_ops = ARRAY_SIZE(devlink_nl_ops),
7919 .mcgrps = devlink_nl_mcgrps,
7920 .n_mcgrps = ARRAY_SIZE(devlink_nl_mcgrps),
7921 };
7922
devlink_reload_actions_valid(const struct devlink_ops * ops)7923 static bool devlink_reload_actions_valid(const struct devlink_ops *ops)
7924 {
7925 const struct devlink_reload_combination *comb;
7926 int i;
7927
7928 if (!devlink_reload_supported(ops)) {
7929 if (WARN_ON(ops->reload_actions))
7930 return false;
7931 return true;
7932 }
7933
7934 if (WARN_ON(!ops->reload_actions ||
7935 ops->reload_actions & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) ||
7936 ops->reload_actions >= BIT(__DEVLINK_RELOAD_ACTION_MAX)))
7937 return false;
7938
7939 if (WARN_ON(ops->reload_limits & BIT(DEVLINK_RELOAD_LIMIT_UNSPEC) ||
7940 ops->reload_limits >= BIT(__DEVLINK_RELOAD_LIMIT_MAX)))
7941 return false;
7942
7943 for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++) {
7944 comb = &devlink_reload_invalid_combinations[i];
7945 if (ops->reload_actions == BIT(comb->action) &&
7946 ops->reload_limits == BIT(comb->limit))
7947 return false;
7948 }
7949 return true;
7950 }
7951
7952 /**
7953 * devlink_alloc - Allocate new devlink instance resources
7954 *
7955 * @ops: ops
7956 * @priv_size: size of user private data
7957 *
7958 * Allocate new devlink instance resources, including devlink index
7959 * and name.
7960 */
devlink_alloc(const struct devlink_ops * ops,size_t priv_size)7961 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
7962 {
7963 struct devlink *devlink;
7964
7965 if (WARN_ON(!ops))
7966 return NULL;
7967
7968 if (!devlink_reload_actions_valid(ops))
7969 return NULL;
7970
7971 devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
7972 if (!devlink)
7973 return NULL;
7974 devlink->ops = ops;
7975 xa_init_flags(&devlink->snapshot_ids, XA_FLAGS_ALLOC);
7976 __devlink_net_set(devlink, &init_net);
7977 INIT_LIST_HEAD(&devlink->port_list);
7978 INIT_LIST_HEAD(&devlink->sb_list);
7979 INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
7980 INIT_LIST_HEAD(&devlink->resource_list);
7981 INIT_LIST_HEAD(&devlink->param_list);
7982 INIT_LIST_HEAD(&devlink->region_list);
7983 INIT_LIST_HEAD(&devlink->reporter_list);
7984 INIT_LIST_HEAD(&devlink->trap_list);
7985 INIT_LIST_HEAD(&devlink->trap_group_list);
7986 INIT_LIST_HEAD(&devlink->trap_policer_list);
7987 mutex_init(&devlink->lock);
7988 mutex_init(&devlink->reporters_lock);
7989 return devlink;
7990 }
7991 EXPORT_SYMBOL_GPL(devlink_alloc);
7992
7993 /**
7994 * devlink_register - Register devlink instance
7995 *
7996 * @devlink: devlink
7997 * @dev: parent device
7998 */
devlink_register(struct devlink * devlink,struct device * dev)7999 int devlink_register(struct devlink *devlink, struct device *dev)
8000 {
8001 devlink->dev = dev;
8002 devlink->registered = true;
8003 mutex_lock(&devlink_mutex);
8004 list_add_tail(&devlink->list, &devlink_list);
8005 devlink_notify(devlink, DEVLINK_CMD_NEW);
8006 mutex_unlock(&devlink_mutex);
8007 return 0;
8008 }
8009 EXPORT_SYMBOL_GPL(devlink_register);
8010
8011 /**
8012 * devlink_unregister - Unregister devlink instance
8013 *
8014 * @devlink: devlink
8015 */
devlink_unregister(struct devlink * devlink)8016 void devlink_unregister(struct devlink *devlink)
8017 {
8018 mutex_lock(&devlink_mutex);
8019 WARN_ON(devlink_reload_supported(devlink->ops) &&
8020 devlink->reload_enabled);
8021 devlink_notify(devlink, DEVLINK_CMD_DEL);
8022 list_del(&devlink->list);
8023 mutex_unlock(&devlink_mutex);
8024 }
8025 EXPORT_SYMBOL_GPL(devlink_unregister);
8026
8027 /**
8028 * devlink_reload_enable - Enable reload of devlink instance
8029 *
8030 * @devlink: devlink
8031 *
8032 * Should be called at end of device initialization
8033 * process when reload operation is supported.
8034 */
devlink_reload_enable(struct devlink * devlink)8035 void devlink_reload_enable(struct devlink *devlink)
8036 {
8037 mutex_lock(&devlink_mutex);
8038 devlink->reload_enabled = true;
8039 mutex_unlock(&devlink_mutex);
8040 }
8041 EXPORT_SYMBOL_GPL(devlink_reload_enable);
8042
8043 /**
8044 * devlink_reload_disable - Disable reload of devlink instance
8045 *
8046 * @devlink: devlink
8047 *
8048 * Should be called at the beginning of device cleanup
8049 * process when reload operation is supported.
8050 */
devlink_reload_disable(struct devlink * devlink)8051 void devlink_reload_disable(struct devlink *devlink)
8052 {
8053 mutex_lock(&devlink_mutex);
8054 /* Mutex is taken which ensures that no reload operation is in
8055 * progress while setting up forbidded flag.
8056 */
8057 devlink->reload_enabled = false;
8058 mutex_unlock(&devlink_mutex);
8059 }
8060 EXPORT_SYMBOL_GPL(devlink_reload_disable);
8061
8062 /**
8063 * devlink_free - Free devlink instance resources
8064 *
8065 * @devlink: devlink
8066 */
devlink_free(struct devlink * devlink)8067 void devlink_free(struct devlink *devlink)
8068 {
8069 mutex_destroy(&devlink->reporters_lock);
8070 mutex_destroy(&devlink->lock);
8071 WARN_ON(!list_empty(&devlink->trap_policer_list));
8072 WARN_ON(!list_empty(&devlink->trap_group_list));
8073 WARN_ON(!list_empty(&devlink->trap_list));
8074 WARN_ON(!list_empty(&devlink->reporter_list));
8075 WARN_ON(!list_empty(&devlink->region_list));
8076 WARN_ON(!list_empty(&devlink->param_list));
8077 WARN_ON(!list_empty(&devlink->resource_list));
8078 WARN_ON(!list_empty(&devlink->dpipe_table_list));
8079 WARN_ON(!list_empty(&devlink->sb_list));
8080 WARN_ON(!list_empty(&devlink->port_list));
8081
8082 xa_destroy(&devlink->snapshot_ids);
8083
8084 kfree(devlink);
8085 }
8086 EXPORT_SYMBOL_GPL(devlink_free);
8087
devlink_port_type_warn(struct work_struct * work)8088 static void devlink_port_type_warn(struct work_struct *work)
8089 {
8090 WARN(true, "Type was not set for devlink port.");
8091 }
8092
devlink_port_type_should_warn(struct devlink_port * devlink_port)8093 static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
8094 {
8095 /* Ignore CPU and DSA flavours. */
8096 return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
8097 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA &&
8098 devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED;
8099 }
8100
8101 #define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)
8102
devlink_port_type_warn_schedule(struct devlink_port * devlink_port)8103 static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
8104 {
8105 if (!devlink_port_type_should_warn(devlink_port))
8106 return;
8107 /* Schedule a work to WARN in case driver does not set port
8108 * type within timeout.
8109 */
8110 schedule_delayed_work(&devlink_port->type_warn_dw,
8111 DEVLINK_PORT_TYPE_WARN_TIMEOUT);
8112 }
8113
devlink_port_type_warn_cancel(struct devlink_port * devlink_port)8114 static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
8115 {
8116 if (!devlink_port_type_should_warn(devlink_port))
8117 return;
8118 cancel_delayed_work_sync(&devlink_port->type_warn_dw);
8119 }
8120
8121 /**
8122 * devlink_port_register - Register devlink port
8123 *
8124 * @devlink: devlink
8125 * @devlink_port: devlink port
8126 * @port_index: driver-specific numerical identifier of the port
8127 *
8128 * Register devlink port with provided port index. User can use
8129 * any indexing, even hw-related one. devlink_port structure
8130 * is convenient to be embedded inside user driver private structure.
8131 * Note that the caller should take care of zeroing the devlink_port
8132 * structure.
8133 */
devlink_port_register(struct devlink * devlink,struct devlink_port * devlink_port,unsigned int port_index)8134 int devlink_port_register(struct devlink *devlink,
8135 struct devlink_port *devlink_port,
8136 unsigned int port_index)
8137 {
8138 mutex_lock(&devlink->lock);
8139 if (devlink_port_index_exists(devlink, port_index)) {
8140 mutex_unlock(&devlink->lock);
8141 return -EEXIST;
8142 }
8143 devlink_port->devlink = devlink;
8144 devlink_port->index = port_index;
8145 devlink_port->registered = true;
8146 spin_lock_init(&devlink_port->type_lock);
8147 INIT_LIST_HEAD(&devlink_port->reporter_list);
8148 mutex_init(&devlink_port->reporters_lock);
8149 list_add_tail(&devlink_port->list, &devlink->port_list);
8150 INIT_LIST_HEAD(&devlink_port->param_list);
8151 INIT_LIST_HEAD(&devlink_port->region_list);
8152 mutex_unlock(&devlink->lock);
8153 INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
8154 devlink_port_type_warn_schedule(devlink_port);
8155 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
8156 return 0;
8157 }
8158 EXPORT_SYMBOL_GPL(devlink_port_register);
8159
8160 /**
8161 * devlink_port_unregister - Unregister devlink port
8162 *
8163 * @devlink_port: devlink port
8164 */
devlink_port_unregister(struct devlink_port * devlink_port)8165 void devlink_port_unregister(struct devlink_port *devlink_port)
8166 {
8167 struct devlink *devlink = devlink_port->devlink;
8168
8169 devlink_port_type_warn_cancel(devlink_port);
8170 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
8171 mutex_lock(&devlink->lock);
8172 list_del(&devlink_port->list);
8173 mutex_unlock(&devlink->lock);
8174 WARN_ON(!list_empty(&devlink_port->reporter_list));
8175 WARN_ON(!list_empty(&devlink_port->region_list));
8176 mutex_destroy(&devlink_port->reporters_lock);
8177 }
8178 EXPORT_SYMBOL_GPL(devlink_port_unregister);
8179
__devlink_port_type_set(struct devlink_port * devlink_port,enum devlink_port_type type,void * type_dev)8180 static void __devlink_port_type_set(struct devlink_port *devlink_port,
8181 enum devlink_port_type type,
8182 void *type_dev)
8183 {
8184 if (WARN_ON(!devlink_port->registered))
8185 return;
8186 devlink_port_type_warn_cancel(devlink_port);
8187 spin_lock_bh(&devlink_port->type_lock);
8188 devlink_port->type = type;
8189 devlink_port->type_dev = type_dev;
8190 spin_unlock_bh(&devlink_port->type_lock);
8191 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
8192 }
8193
devlink_port_type_netdev_checks(struct devlink_port * devlink_port,struct net_device * netdev)8194 static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port,
8195 struct net_device *netdev)
8196 {
8197 const struct net_device_ops *ops = netdev->netdev_ops;
8198
8199 /* If driver registers devlink port, it should set devlink port
8200 * attributes accordingly so the compat functions are called
8201 * and the original ops are not used.
8202 */
8203 if (ops->ndo_get_phys_port_name) {
8204 /* Some drivers use the same set of ndos for netdevs
8205 * that have devlink_port registered and also for
8206 * those who don't. Make sure that ndo_get_phys_port_name
8207 * returns -EOPNOTSUPP here in case it is defined.
8208 * Warn if not.
8209 */
8210 char name[IFNAMSIZ];
8211 int err;
8212
8213 err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
8214 WARN_ON(err != -EOPNOTSUPP);
8215 }
8216 if (ops->ndo_get_port_parent_id) {
8217 /* Some drivers use the same set of ndos for netdevs
8218 * that have devlink_port registered and also for
8219 * those who don't. Make sure that ndo_get_port_parent_id
8220 * returns -EOPNOTSUPP here in case it is defined.
8221 * Warn if not.
8222 */
8223 struct netdev_phys_item_id ppid;
8224 int err;
8225
8226 err = ops->ndo_get_port_parent_id(netdev, &ppid);
8227 WARN_ON(err != -EOPNOTSUPP);
8228 }
8229 }
8230
8231 /**
8232 * devlink_port_type_eth_set - Set port type to Ethernet
8233 *
8234 * @devlink_port: devlink port
8235 * @netdev: related netdevice
8236 */
devlink_port_type_eth_set(struct devlink_port * devlink_port,struct net_device * netdev)8237 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
8238 struct net_device *netdev)
8239 {
8240 if (netdev)
8241 devlink_port_type_netdev_checks(devlink_port, netdev);
8242 else
8243 dev_warn(devlink_port->devlink->dev,
8244 "devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n",
8245 devlink_port->index);
8246
8247 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
8248 }
8249 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
8250
8251 /**
8252 * devlink_port_type_ib_set - Set port type to InfiniBand
8253 *
8254 * @devlink_port: devlink port
8255 * @ibdev: related IB device
8256 */
devlink_port_type_ib_set(struct devlink_port * devlink_port,struct ib_device * ibdev)8257 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
8258 struct ib_device *ibdev)
8259 {
8260 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
8261 }
8262 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
8263
8264 /**
8265 * devlink_port_type_clear - Clear port type
8266 *
8267 * @devlink_port: devlink port
8268 */
devlink_port_type_clear(struct devlink_port * devlink_port)8269 void devlink_port_type_clear(struct devlink_port *devlink_port)
8270 {
8271 __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
8272 devlink_port_type_warn_schedule(devlink_port);
8273 }
8274 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
8275
__devlink_port_attrs_set(struct devlink_port * devlink_port,enum devlink_port_flavour flavour)8276 static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
8277 enum devlink_port_flavour flavour)
8278 {
8279 struct devlink_port_attrs *attrs = &devlink_port->attrs;
8280
8281 devlink_port->attrs_set = true;
8282 attrs->flavour = flavour;
8283 if (attrs->switch_id.id_len) {
8284 devlink_port->switch_port = true;
8285 if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN))
8286 attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN;
8287 } else {
8288 devlink_port->switch_port = false;
8289 }
8290 return 0;
8291 }
8292
8293 /**
8294 * devlink_port_attrs_set - Set port attributes
8295 *
8296 * @devlink_port: devlink port
8297 * @attrs: devlink port attrs
8298 */
devlink_port_attrs_set(struct devlink_port * devlink_port,struct devlink_port_attrs * attrs)8299 void devlink_port_attrs_set(struct devlink_port *devlink_port,
8300 struct devlink_port_attrs *attrs)
8301 {
8302 int ret;
8303
8304 if (WARN_ON(devlink_port->registered))
8305 return;
8306 devlink_port->attrs = *attrs;
8307 ret = __devlink_port_attrs_set(devlink_port, attrs->flavour);
8308 if (ret)
8309 return;
8310 WARN_ON(attrs->splittable && attrs->split);
8311 }
8312 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
8313
8314 /**
8315 * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
8316 *
8317 * @devlink_port: devlink port
8318 * @controller: associated controller number for the devlink port instance
8319 * @pf: associated PF for the devlink port instance
8320 * @external: indicates if the port is for an external controller
8321 */
devlink_port_attrs_pci_pf_set(struct devlink_port * devlink_port,u32 controller,u16 pf,bool external)8322 void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller,
8323 u16 pf, bool external)
8324 {
8325 struct devlink_port_attrs *attrs = &devlink_port->attrs;
8326 int ret;
8327
8328 if (WARN_ON(devlink_port->registered))
8329 return;
8330 ret = __devlink_port_attrs_set(devlink_port,
8331 DEVLINK_PORT_FLAVOUR_PCI_PF);
8332 if (ret)
8333 return;
8334 attrs->pci_pf.controller = controller;
8335 attrs->pci_pf.pf = pf;
8336 attrs->pci_pf.external = external;
8337 }
8338 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
8339
8340 /**
8341 * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
8342 *
8343 * @devlink_port: devlink port
8344 * @controller: associated controller number for the devlink port instance
8345 * @pf: associated PF for the devlink port instance
8346 * @vf: associated VF of a PF for the devlink port instance
8347 * @external: indicates if the port is for an external controller
8348 */
devlink_port_attrs_pci_vf_set(struct devlink_port * devlink_port,u32 controller,u16 pf,u16 vf,bool external)8349 void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller,
8350 u16 pf, u16 vf, bool external)
8351 {
8352 struct devlink_port_attrs *attrs = &devlink_port->attrs;
8353 int ret;
8354
8355 if (WARN_ON(devlink_port->registered))
8356 return;
8357 ret = __devlink_port_attrs_set(devlink_port,
8358 DEVLINK_PORT_FLAVOUR_PCI_VF);
8359 if (ret)
8360 return;
8361 attrs->pci_vf.controller = controller;
8362 attrs->pci_vf.pf = pf;
8363 attrs->pci_vf.vf = vf;
8364 attrs->pci_vf.external = external;
8365 }
8366 EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
8367
__devlink_port_phys_port_name_get(struct devlink_port * devlink_port,char * name,size_t len)8368 static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
8369 char *name, size_t len)
8370 {
8371 struct devlink_port_attrs *attrs = &devlink_port->attrs;
8372 int n = 0;
8373
8374 if (!devlink_port->attrs_set)
8375 return -EOPNOTSUPP;
8376
8377 switch (attrs->flavour) {
8378 case DEVLINK_PORT_FLAVOUR_PHYSICAL:
8379 case DEVLINK_PORT_FLAVOUR_VIRTUAL:
8380 if (!attrs->split)
8381 n = snprintf(name, len, "p%u", attrs->phys.port_number);
8382 else
8383 n = snprintf(name, len, "p%us%u",
8384 attrs->phys.port_number,
8385 attrs->phys.split_subport_number);
8386 break;
8387 case DEVLINK_PORT_FLAVOUR_CPU:
8388 case DEVLINK_PORT_FLAVOUR_DSA:
8389 case DEVLINK_PORT_FLAVOUR_UNUSED:
8390 /* As CPU and DSA ports do not have a netdevice associated
8391 * case should not ever happen.
8392 */
8393 WARN_ON(1);
8394 return -EINVAL;
8395 case DEVLINK_PORT_FLAVOUR_PCI_PF:
8396 if (attrs->pci_pf.external) {
8397 n = snprintf(name, len, "c%u", attrs->pci_pf.controller);
8398 if (n >= len)
8399 return -EINVAL;
8400 len -= n;
8401 name += n;
8402 }
8403 n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
8404 break;
8405 case DEVLINK_PORT_FLAVOUR_PCI_VF:
8406 if (attrs->pci_vf.external) {
8407 n = snprintf(name, len, "c%u", attrs->pci_vf.controller);
8408 if (n >= len)
8409 return -EINVAL;
8410 len -= n;
8411 name += n;
8412 }
8413 n = snprintf(name, len, "pf%uvf%u",
8414 attrs->pci_vf.pf, attrs->pci_vf.vf);
8415 break;
8416 }
8417
8418 if (n >= len)
8419 return -EINVAL;
8420
8421 return 0;
8422 }
8423
devlink_sb_register(struct devlink * devlink,unsigned int sb_index,u32 size,u16 ingress_pools_count,u16 egress_pools_count,u16 ingress_tc_count,u16 egress_tc_count)8424 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
8425 u32 size, u16 ingress_pools_count,
8426 u16 egress_pools_count, u16 ingress_tc_count,
8427 u16 egress_tc_count)
8428 {
8429 struct devlink_sb *devlink_sb;
8430 int err = 0;
8431
8432 mutex_lock(&devlink->lock);
8433 if (devlink_sb_index_exists(devlink, sb_index)) {
8434 err = -EEXIST;
8435 goto unlock;
8436 }
8437
8438 devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
8439 if (!devlink_sb) {
8440 err = -ENOMEM;
8441 goto unlock;
8442 }
8443 devlink_sb->index = sb_index;
8444 devlink_sb->size = size;
8445 devlink_sb->ingress_pools_count = ingress_pools_count;
8446 devlink_sb->egress_pools_count = egress_pools_count;
8447 devlink_sb->ingress_tc_count = ingress_tc_count;
8448 devlink_sb->egress_tc_count = egress_tc_count;
8449 list_add_tail(&devlink_sb->list, &devlink->sb_list);
8450 unlock:
8451 mutex_unlock(&devlink->lock);
8452 return err;
8453 }
8454 EXPORT_SYMBOL_GPL(devlink_sb_register);
8455
devlink_sb_unregister(struct devlink * devlink,unsigned int sb_index)8456 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
8457 {
8458 struct devlink_sb *devlink_sb;
8459
8460 mutex_lock(&devlink->lock);
8461 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
8462 WARN_ON(!devlink_sb);
8463 list_del(&devlink_sb->list);
8464 mutex_unlock(&devlink->lock);
8465 kfree(devlink_sb);
8466 }
8467 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
8468
8469 /**
8470 * devlink_dpipe_headers_register - register dpipe headers
8471 *
8472 * @devlink: devlink
8473 * @dpipe_headers: dpipe header array
8474 *
8475 * Register the headers supported by hardware.
8476 */
devlink_dpipe_headers_register(struct devlink * devlink,struct devlink_dpipe_headers * dpipe_headers)8477 int devlink_dpipe_headers_register(struct devlink *devlink,
8478 struct devlink_dpipe_headers *dpipe_headers)
8479 {
8480 mutex_lock(&devlink->lock);
8481 devlink->dpipe_headers = dpipe_headers;
8482 mutex_unlock(&devlink->lock);
8483 return 0;
8484 }
8485 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
8486
8487 /**
8488 * devlink_dpipe_headers_unregister - unregister dpipe headers
8489 *
8490 * @devlink: devlink
8491 *
8492 * Unregister the headers supported by hardware.
8493 */
devlink_dpipe_headers_unregister(struct devlink * devlink)8494 void devlink_dpipe_headers_unregister(struct devlink *devlink)
8495 {
8496 mutex_lock(&devlink->lock);
8497 devlink->dpipe_headers = NULL;
8498 mutex_unlock(&devlink->lock);
8499 }
8500 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
8501
8502 /**
8503 * devlink_dpipe_table_counter_enabled - check if counter allocation
8504 * required
8505 * @devlink: devlink
8506 * @table_name: tables name
8507 *
8508 * Used by driver to check if counter allocation is required.
8509 * After counter allocation is turned on the table entries
8510 * are updated to include counter statistics.
8511 *
8512 * After that point on the driver must respect the counter
8513 * state so that each entry added to the table is added
8514 * with a counter.
8515 */
devlink_dpipe_table_counter_enabled(struct devlink * devlink,const char * table_name)8516 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
8517 const char *table_name)
8518 {
8519 struct devlink_dpipe_table *table;
8520 bool enabled;
8521
8522 rcu_read_lock();
8523 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
8524 table_name, devlink);
8525 enabled = false;
8526 if (table)
8527 enabled = table->counters_enabled;
8528 rcu_read_unlock();
8529 return enabled;
8530 }
8531 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
8532
8533 /**
8534 * devlink_dpipe_table_register - register dpipe table
8535 *
8536 * @devlink: devlink
8537 * @table_name: table name
8538 * @table_ops: table ops
8539 * @priv: priv
8540 * @counter_control_extern: external control for counters
8541 */
devlink_dpipe_table_register(struct devlink * devlink,const char * table_name,struct devlink_dpipe_table_ops * table_ops,void * priv,bool counter_control_extern)8542 int devlink_dpipe_table_register(struct devlink *devlink,
8543 const char *table_name,
8544 struct devlink_dpipe_table_ops *table_ops,
8545 void *priv, bool counter_control_extern)
8546 {
8547 struct devlink_dpipe_table *table;
8548 int err = 0;
8549
8550 if (WARN_ON(!table_ops->size_get))
8551 return -EINVAL;
8552
8553 mutex_lock(&devlink->lock);
8554
8555 if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name,
8556 devlink)) {
8557 err = -EEXIST;
8558 goto unlock;
8559 }
8560
8561 table = kzalloc(sizeof(*table), GFP_KERNEL);
8562 if (!table) {
8563 err = -ENOMEM;
8564 goto unlock;
8565 }
8566
8567 table->name = table_name;
8568 table->table_ops = table_ops;
8569 table->priv = priv;
8570 table->counter_control_extern = counter_control_extern;
8571
8572 list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
8573 unlock:
8574 mutex_unlock(&devlink->lock);
8575 return err;
8576 }
8577 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
8578
8579 /**
8580 * devlink_dpipe_table_unregister - unregister dpipe table
8581 *
8582 * @devlink: devlink
8583 * @table_name: table name
8584 */
devlink_dpipe_table_unregister(struct devlink * devlink,const char * table_name)8585 void devlink_dpipe_table_unregister(struct devlink *devlink,
8586 const char *table_name)
8587 {
8588 struct devlink_dpipe_table *table;
8589
8590 mutex_lock(&devlink->lock);
8591 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
8592 table_name, devlink);
8593 if (!table)
8594 goto unlock;
8595 list_del_rcu(&table->list);
8596 mutex_unlock(&devlink->lock);
8597 kfree_rcu(table, rcu);
8598 return;
8599 unlock:
8600 mutex_unlock(&devlink->lock);
8601 }
8602 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
8603
8604 /**
8605 * devlink_resource_register - devlink resource register
8606 *
8607 * @devlink: devlink
8608 * @resource_name: resource's name
8609 * @resource_size: resource's size
8610 * @resource_id: resource's id
8611 * @parent_resource_id: resource's parent id
8612 * @size_params: size parameters
8613 */
devlink_resource_register(struct devlink * devlink,const char * resource_name,u64 resource_size,u64 resource_id,u64 parent_resource_id,const struct devlink_resource_size_params * size_params)8614 int devlink_resource_register(struct devlink *devlink,
8615 const char *resource_name,
8616 u64 resource_size,
8617 u64 resource_id,
8618 u64 parent_resource_id,
8619 const struct devlink_resource_size_params *size_params)
8620 {
8621 struct devlink_resource *resource;
8622 struct list_head *resource_list;
8623 bool top_hierarchy;
8624 int err = 0;
8625
8626 top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
8627
8628 mutex_lock(&devlink->lock);
8629 resource = devlink_resource_find(devlink, NULL, resource_id);
8630 if (resource) {
8631 err = -EINVAL;
8632 goto out;
8633 }
8634
8635 resource = kzalloc(sizeof(*resource), GFP_KERNEL);
8636 if (!resource) {
8637 err = -ENOMEM;
8638 goto out;
8639 }
8640
8641 if (top_hierarchy) {
8642 resource_list = &devlink->resource_list;
8643 } else {
8644 struct devlink_resource *parent_resource;
8645
8646 parent_resource = devlink_resource_find(devlink, NULL,
8647 parent_resource_id);
8648 if (parent_resource) {
8649 resource_list = &parent_resource->resource_list;
8650 resource->parent = parent_resource;
8651 } else {
8652 kfree(resource);
8653 err = -EINVAL;
8654 goto out;
8655 }
8656 }
8657
8658 resource->name = resource_name;
8659 resource->size = resource_size;
8660 resource->size_new = resource_size;
8661 resource->id = resource_id;
8662 resource->size_valid = true;
8663 memcpy(&resource->size_params, size_params,
8664 sizeof(resource->size_params));
8665 INIT_LIST_HEAD(&resource->resource_list);
8666 list_add_tail(&resource->list, resource_list);
8667 out:
8668 mutex_unlock(&devlink->lock);
8669 return err;
8670 }
8671 EXPORT_SYMBOL_GPL(devlink_resource_register);
8672
8673 /**
8674 * devlink_resources_unregister - free all resources
8675 *
8676 * @devlink: devlink
8677 * @resource: resource
8678 */
devlink_resources_unregister(struct devlink * devlink,struct devlink_resource * resource)8679 void devlink_resources_unregister(struct devlink *devlink,
8680 struct devlink_resource *resource)
8681 {
8682 struct devlink_resource *tmp, *child_resource;
8683 struct list_head *resource_list;
8684
8685 if (resource)
8686 resource_list = &resource->resource_list;
8687 else
8688 resource_list = &devlink->resource_list;
8689
8690 if (!resource)
8691 mutex_lock(&devlink->lock);
8692
8693 list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
8694 devlink_resources_unregister(devlink, child_resource);
8695 list_del(&child_resource->list);
8696 kfree(child_resource);
8697 }
8698
8699 if (!resource)
8700 mutex_unlock(&devlink->lock);
8701 }
8702 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
8703
8704 /**
8705 * devlink_resource_size_get - get and update size
8706 *
8707 * @devlink: devlink
8708 * @resource_id: the requested resource id
8709 * @p_resource_size: ptr to update
8710 */
devlink_resource_size_get(struct devlink * devlink,u64 resource_id,u64 * p_resource_size)8711 int devlink_resource_size_get(struct devlink *devlink,
8712 u64 resource_id,
8713 u64 *p_resource_size)
8714 {
8715 struct devlink_resource *resource;
8716 int err = 0;
8717
8718 mutex_lock(&devlink->lock);
8719 resource = devlink_resource_find(devlink, NULL, resource_id);
8720 if (!resource) {
8721 err = -EINVAL;
8722 goto out;
8723 }
8724 *p_resource_size = resource->size_new;
8725 resource->size = resource->size_new;
8726 out:
8727 mutex_unlock(&devlink->lock);
8728 return err;
8729 }
8730 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
8731
8732 /**
8733 * devlink_dpipe_table_resource_set - set the resource id
8734 *
8735 * @devlink: devlink
8736 * @table_name: table name
8737 * @resource_id: resource id
8738 * @resource_units: number of resource's units consumed per table's entry
8739 */
devlink_dpipe_table_resource_set(struct devlink * devlink,const char * table_name,u64 resource_id,u64 resource_units)8740 int devlink_dpipe_table_resource_set(struct devlink *devlink,
8741 const char *table_name, u64 resource_id,
8742 u64 resource_units)
8743 {
8744 struct devlink_dpipe_table *table;
8745 int err = 0;
8746
8747 mutex_lock(&devlink->lock);
8748 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
8749 table_name, devlink);
8750 if (!table) {
8751 err = -EINVAL;
8752 goto out;
8753 }
8754 table->resource_id = resource_id;
8755 table->resource_units = resource_units;
8756 table->resource_valid = true;
8757 out:
8758 mutex_unlock(&devlink->lock);
8759 return err;
8760 }
8761 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
8762
8763 /**
8764 * devlink_resource_occ_get_register - register occupancy getter
8765 *
8766 * @devlink: devlink
8767 * @resource_id: resource id
8768 * @occ_get: occupancy getter callback
8769 * @occ_get_priv: occupancy getter callback priv
8770 */
devlink_resource_occ_get_register(struct devlink * devlink,u64 resource_id,devlink_resource_occ_get_t * occ_get,void * occ_get_priv)8771 void devlink_resource_occ_get_register(struct devlink *devlink,
8772 u64 resource_id,
8773 devlink_resource_occ_get_t *occ_get,
8774 void *occ_get_priv)
8775 {
8776 struct devlink_resource *resource;
8777
8778 mutex_lock(&devlink->lock);
8779 resource = devlink_resource_find(devlink, NULL, resource_id);
8780 if (WARN_ON(!resource))
8781 goto out;
8782 WARN_ON(resource->occ_get);
8783
8784 resource->occ_get = occ_get;
8785 resource->occ_get_priv = occ_get_priv;
8786 out:
8787 mutex_unlock(&devlink->lock);
8788 }
8789 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
8790
8791 /**
8792 * devlink_resource_occ_get_unregister - unregister occupancy getter
8793 *
8794 * @devlink: devlink
8795 * @resource_id: resource id
8796 */
devlink_resource_occ_get_unregister(struct devlink * devlink,u64 resource_id)8797 void devlink_resource_occ_get_unregister(struct devlink *devlink,
8798 u64 resource_id)
8799 {
8800 struct devlink_resource *resource;
8801
8802 mutex_lock(&devlink->lock);
8803 resource = devlink_resource_find(devlink, NULL, resource_id);
8804 if (WARN_ON(!resource))
8805 goto out;
8806 WARN_ON(!resource->occ_get);
8807
8808 resource->occ_get = NULL;
8809 resource->occ_get_priv = NULL;
8810 out:
8811 mutex_unlock(&devlink->lock);
8812 }
8813 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
8814
devlink_param_verify(const struct devlink_param * param)8815 static int devlink_param_verify(const struct devlink_param *param)
8816 {
8817 if (!param || !param->name || !param->supported_cmodes)
8818 return -EINVAL;
8819 if (param->generic)
8820 return devlink_param_generic_verify(param);
8821 else
8822 return devlink_param_driver_verify(param);
8823 }
8824
__devlink_params_register(struct devlink * devlink,unsigned int port_index,struct list_head * param_list,const struct devlink_param * params,size_t params_count,enum devlink_command reg_cmd,enum devlink_command unreg_cmd)8825 static int __devlink_params_register(struct devlink *devlink,
8826 unsigned int port_index,
8827 struct list_head *param_list,
8828 const struct devlink_param *params,
8829 size_t params_count,
8830 enum devlink_command reg_cmd,
8831 enum devlink_command unreg_cmd)
8832 {
8833 const struct devlink_param *param = params;
8834 int i;
8835 int err;
8836
8837 mutex_lock(&devlink->lock);
8838 for (i = 0; i < params_count; i++, param++) {
8839 err = devlink_param_verify(param);
8840 if (err)
8841 goto rollback;
8842
8843 err = devlink_param_register_one(devlink, port_index,
8844 param_list, param, reg_cmd);
8845 if (err)
8846 goto rollback;
8847 }
8848
8849 mutex_unlock(&devlink->lock);
8850 return 0;
8851
8852 rollback:
8853 if (!i)
8854 goto unlock;
8855 for (param--; i > 0; i--, param--)
8856 devlink_param_unregister_one(devlink, port_index, param_list,
8857 param, unreg_cmd);
8858 unlock:
8859 mutex_unlock(&devlink->lock);
8860 return err;
8861 }
8862
__devlink_params_unregister(struct devlink * devlink,unsigned int port_index,struct list_head * param_list,const struct devlink_param * params,size_t params_count,enum devlink_command cmd)8863 static void __devlink_params_unregister(struct devlink *devlink,
8864 unsigned int port_index,
8865 struct list_head *param_list,
8866 const struct devlink_param *params,
8867 size_t params_count,
8868 enum devlink_command cmd)
8869 {
8870 const struct devlink_param *param = params;
8871 int i;
8872
8873 mutex_lock(&devlink->lock);
8874 for (i = 0; i < params_count; i++, param++)
8875 devlink_param_unregister_one(devlink, 0, param_list, param,
8876 cmd);
8877 mutex_unlock(&devlink->lock);
8878 }
8879
8880 /**
8881 * devlink_params_register - register configuration parameters
8882 *
8883 * @devlink: devlink
8884 * @params: configuration parameters array
8885 * @params_count: number of parameters provided
8886 *
8887 * Register the configuration parameters supported by the driver.
8888 */
devlink_params_register(struct devlink * devlink,const struct devlink_param * params,size_t params_count)8889 int devlink_params_register(struct devlink *devlink,
8890 const struct devlink_param *params,
8891 size_t params_count)
8892 {
8893 return __devlink_params_register(devlink, 0, &devlink->param_list,
8894 params, params_count,
8895 DEVLINK_CMD_PARAM_NEW,
8896 DEVLINK_CMD_PARAM_DEL);
8897 }
8898 EXPORT_SYMBOL_GPL(devlink_params_register);
8899
8900 /**
8901 * devlink_params_unregister - unregister configuration parameters
8902 * @devlink: devlink
8903 * @params: configuration parameters to unregister
8904 * @params_count: number of parameters provided
8905 */
devlink_params_unregister(struct devlink * devlink,const struct devlink_param * params,size_t params_count)8906 void devlink_params_unregister(struct devlink *devlink,
8907 const struct devlink_param *params,
8908 size_t params_count)
8909 {
8910 return __devlink_params_unregister(devlink, 0, &devlink->param_list,
8911 params, params_count,
8912 DEVLINK_CMD_PARAM_DEL);
8913 }
8914 EXPORT_SYMBOL_GPL(devlink_params_unregister);
8915
8916 /**
8917 * devlink_params_publish - publish configuration parameters
8918 *
8919 * @devlink: devlink
8920 *
8921 * Publish previously registered configuration parameters.
8922 */
devlink_params_publish(struct devlink * devlink)8923 void devlink_params_publish(struct devlink *devlink)
8924 {
8925 struct devlink_param_item *param_item;
8926
8927 list_for_each_entry(param_item, &devlink->param_list, list) {
8928 if (param_item->published)
8929 continue;
8930 param_item->published = true;
8931 devlink_param_notify(devlink, 0, param_item,
8932 DEVLINK_CMD_PARAM_NEW);
8933 }
8934 }
8935 EXPORT_SYMBOL_GPL(devlink_params_publish);
8936
8937 /**
8938 * devlink_params_unpublish - unpublish configuration parameters
8939 *
8940 * @devlink: devlink
8941 *
8942 * Unpublish previously registered configuration parameters.
8943 */
devlink_params_unpublish(struct devlink * devlink)8944 void devlink_params_unpublish(struct devlink *devlink)
8945 {
8946 struct devlink_param_item *param_item;
8947
8948 list_for_each_entry(param_item, &devlink->param_list, list) {
8949 if (!param_item->published)
8950 continue;
8951 param_item->published = false;
8952 devlink_param_notify(devlink, 0, param_item,
8953 DEVLINK_CMD_PARAM_DEL);
8954 }
8955 }
8956 EXPORT_SYMBOL_GPL(devlink_params_unpublish);
8957
8958 /**
8959 * devlink_port_params_register - register port configuration parameters
8960 *
8961 * @devlink_port: devlink port
8962 * @params: configuration parameters array
8963 * @params_count: number of parameters provided
8964 *
8965 * Register the configuration parameters supported by the port.
8966 */
devlink_port_params_register(struct devlink_port * devlink_port,const struct devlink_param * params,size_t params_count)8967 int devlink_port_params_register(struct devlink_port *devlink_port,
8968 const struct devlink_param *params,
8969 size_t params_count)
8970 {
8971 return __devlink_params_register(devlink_port->devlink,
8972 devlink_port->index,
8973 &devlink_port->param_list, params,
8974 params_count,
8975 DEVLINK_CMD_PORT_PARAM_NEW,
8976 DEVLINK_CMD_PORT_PARAM_DEL);
8977 }
8978 EXPORT_SYMBOL_GPL(devlink_port_params_register);
8979
8980 /**
8981 * devlink_port_params_unregister - unregister port configuration
8982 * parameters
8983 *
8984 * @devlink_port: devlink port
8985 * @params: configuration parameters array
8986 * @params_count: number of parameters provided
8987 */
devlink_port_params_unregister(struct devlink_port * devlink_port,const struct devlink_param * params,size_t params_count)8988 void devlink_port_params_unregister(struct devlink_port *devlink_port,
8989 const struct devlink_param *params,
8990 size_t params_count)
8991 {
8992 return __devlink_params_unregister(devlink_port->devlink,
8993 devlink_port->index,
8994 &devlink_port->param_list,
8995 params, params_count,
8996 DEVLINK_CMD_PORT_PARAM_DEL);
8997 }
8998 EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
8999
9000 static int
__devlink_param_driverinit_value_get(struct list_head * param_list,u32 param_id,union devlink_param_value * init_val)9001 __devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
9002 union devlink_param_value *init_val)
9003 {
9004 struct devlink_param_item *param_item;
9005
9006 param_item = devlink_param_find_by_id(param_list, param_id);
9007 if (!param_item)
9008 return -EINVAL;
9009
9010 if (!param_item->driverinit_value_valid ||
9011 !devlink_param_cmode_is_supported(param_item->param,
9012 DEVLINK_PARAM_CMODE_DRIVERINIT))
9013 return -EOPNOTSUPP;
9014
9015 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
9016 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
9017 else
9018 *init_val = param_item->driverinit_value;
9019
9020 return 0;
9021 }
9022
9023 static int
__devlink_param_driverinit_value_set(struct devlink * devlink,unsigned int port_index,struct list_head * param_list,u32 param_id,union devlink_param_value init_val,enum devlink_command cmd)9024 __devlink_param_driverinit_value_set(struct devlink *devlink,
9025 unsigned int port_index,
9026 struct list_head *param_list, u32 param_id,
9027 union devlink_param_value init_val,
9028 enum devlink_command cmd)
9029 {
9030 struct devlink_param_item *param_item;
9031
9032 param_item = devlink_param_find_by_id(param_list, param_id);
9033 if (!param_item)
9034 return -EINVAL;
9035
9036 if (!devlink_param_cmode_is_supported(param_item->param,
9037 DEVLINK_PARAM_CMODE_DRIVERINIT))
9038 return -EOPNOTSUPP;
9039
9040 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
9041 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
9042 else
9043 param_item->driverinit_value = init_val;
9044 param_item->driverinit_value_valid = true;
9045
9046 devlink_param_notify(devlink, port_index, param_item, cmd);
9047 return 0;
9048 }
9049
9050 /**
9051 * devlink_param_driverinit_value_get - get configuration parameter
9052 * value for driver initializing
9053 *
9054 * @devlink: devlink
9055 * @param_id: parameter ID
9056 * @init_val: value of parameter in driverinit configuration mode
9057 *
9058 * This function should be used by the driver to get driverinit
9059 * configuration for initialization after reload command.
9060 */
devlink_param_driverinit_value_get(struct devlink * devlink,u32 param_id,union devlink_param_value * init_val)9061 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
9062 union devlink_param_value *init_val)
9063 {
9064 if (!devlink_reload_supported(devlink->ops))
9065 return -EOPNOTSUPP;
9066
9067 return __devlink_param_driverinit_value_get(&devlink->param_list,
9068 param_id, init_val);
9069 }
9070 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
9071
9072 /**
9073 * devlink_param_driverinit_value_set - set value of configuration
9074 * parameter for driverinit
9075 * configuration mode
9076 *
9077 * @devlink: devlink
9078 * @param_id: parameter ID
9079 * @init_val: value of parameter to set for driverinit configuration mode
9080 *
9081 * This function should be used by the driver to set driverinit
9082 * configuration mode default value.
9083 */
devlink_param_driverinit_value_set(struct devlink * devlink,u32 param_id,union devlink_param_value init_val)9084 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
9085 union devlink_param_value init_val)
9086 {
9087 return __devlink_param_driverinit_value_set(devlink, 0,
9088 &devlink->param_list,
9089 param_id, init_val,
9090 DEVLINK_CMD_PARAM_NEW);
9091 }
9092 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
9093
9094 /**
9095 * devlink_port_param_driverinit_value_get - get configuration parameter
9096 * value for driver initializing
9097 *
9098 * @devlink_port: devlink_port
9099 * @param_id: parameter ID
9100 * @init_val: value of parameter in driverinit configuration mode
9101 *
9102 * This function should be used by the driver to get driverinit
9103 * configuration for initialization after reload command.
9104 */
devlink_port_param_driverinit_value_get(struct devlink_port * devlink_port,u32 param_id,union devlink_param_value * init_val)9105 int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
9106 u32 param_id,
9107 union devlink_param_value *init_val)
9108 {
9109 struct devlink *devlink = devlink_port->devlink;
9110
9111 if (!devlink_reload_supported(devlink->ops))
9112 return -EOPNOTSUPP;
9113
9114 return __devlink_param_driverinit_value_get(&devlink_port->param_list,
9115 param_id, init_val);
9116 }
9117 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
9118
9119 /**
9120 * devlink_port_param_driverinit_value_set - set value of configuration
9121 * parameter for driverinit
9122 * configuration mode
9123 *
9124 * @devlink_port: devlink_port
9125 * @param_id: parameter ID
9126 * @init_val: value of parameter to set for driverinit configuration mode
9127 *
9128 * This function should be used by the driver to set driverinit
9129 * configuration mode default value.
9130 */
devlink_port_param_driverinit_value_set(struct devlink_port * devlink_port,u32 param_id,union devlink_param_value init_val)9131 int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
9132 u32 param_id,
9133 union devlink_param_value init_val)
9134 {
9135 return __devlink_param_driverinit_value_set(devlink_port->devlink,
9136 devlink_port->index,
9137 &devlink_port->param_list,
9138 param_id, init_val,
9139 DEVLINK_CMD_PORT_PARAM_NEW);
9140 }
9141 EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
9142
9143 /**
9144 * devlink_param_value_changed - notify devlink on a parameter's value
9145 * change. Should be called by the driver
9146 * right after the change.
9147 *
9148 * @devlink: devlink
9149 * @param_id: parameter ID
9150 *
9151 * This function should be used by the driver to notify devlink on value
9152 * change, excluding driverinit configuration mode.
9153 * For driverinit configuration mode driver should use the function
9154 */
devlink_param_value_changed(struct devlink * devlink,u32 param_id)9155 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
9156 {
9157 struct devlink_param_item *param_item;
9158
9159 param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
9160 WARN_ON(!param_item);
9161
9162 devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
9163 }
9164 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
9165
9166 /**
9167 * devlink_port_param_value_changed - notify devlink on a parameter's value
9168 * change. Should be called by the driver
9169 * right after the change.
9170 *
9171 * @devlink_port: devlink_port
9172 * @param_id: parameter ID
9173 *
9174 * This function should be used by the driver to notify devlink on value
9175 * change, excluding driverinit configuration mode.
9176 * For driverinit configuration mode driver should use the function
9177 * devlink_port_param_driverinit_value_set() instead.
9178 */
devlink_port_param_value_changed(struct devlink_port * devlink_port,u32 param_id)9179 void devlink_port_param_value_changed(struct devlink_port *devlink_port,
9180 u32 param_id)
9181 {
9182 struct devlink_param_item *param_item;
9183
9184 param_item = devlink_param_find_by_id(&devlink_port->param_list,
9185 param_id);
9186 WARN_ON(!param_item);
9187
9188 devlink_param_notify(devlink_port->devlink, devlink_port->index,
9189 param_item, DEVLINK_CMD_PORT_PARAM_NEW);
9190 }
9191 EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
9192
9193 /**
9194 * devlink_param_value_str_fill - Safely fill-up the string preventing
9195 * from overflow of the preallocated buffer
9196 *
9197 * @dst_val: destination devlink_param_value
9198 * @src: source buffer
9199 */
devlink_param_value_str_fill(union devlink_param_value * dst_val,const char * src)9200 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
9201 const char *src)
9202 {
9203 size_t len;
9204
9205 len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
9206 WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
9207 }
9208 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
9209
9210 /**
9211 * devlink_region_create - create a new address region
9212 *
9213 * @devlink: devlink
9214 * @ops: region operations and name
9215 * @region_max_snapshots: Maximum supported number of snapshots for region
9216 * @region_size: size of region
9217 */
9218 struct devlink_region *
devlink_region_create(struct devlink * devlink,const struct devlink_region_ops * ops,u32 region_max_snapshots,u64 region_size)9219 devlink_region_create(struct devlink *devlink,
9220 const struct devlink_region_ops *ops,
9221 u32 region_max_snapshots, u64 region_size)
9222 {
9223 struct devlink_region *region;
9224 int err = 0;
9225
9226 if (WARN_ON(!ops) || WARN_ON(!ops->destructor))
9227 return ERR_PTR(-EINVAL);
9228
9229 mutex_lock(&devlink->lock);
9230
9231 if (devlink_region_get_by_name(devlink, ops->name)) {
9232 err = -EEXIST;
9233 goto unlock;
9234 }
9235
9236 region = kzalloc(sizeof(*region), GFP_KERNEL);
9237 if (!region) {
9238 err = -ENOMEM;
9239 goto unlock;
9240 }
9241
9242 region->devlink = devlink;
9243 region->max_snapshots = region_max_snapshots;
9244 region->ops = ops;
9245 region->size = region_size;
9246 INIT_LIST_HEAD(®ion->snapshot_list);
9247 list_add_tail(®ion->list, &devlink->region_list);
9248 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
9249
9250 mutex_unlock(&devlink->lock);
9251 return region;
9252
9253 unlock:
9254 mutex_unlock(&devlink->lock);
9255 return ERR_PTR(err);
9256 }
9257 EXPORT_SYMBOL_GPL(devlink_region_create);
9258
9259 /**
9260 * devlink_port_region_create - create a new address region for a port
9261 *
9262 * @port: devlink port
9263 * @ops: region operations and name
9264 * @region_max_snapshots: Maximum supported number of snapshots for region
9265 * @region_size: size of region
9266 */
9267 struct devlink_region *
devlink_port_region_create(struct devlink_port * port,const struct devlink_port_region_ops * ops,u32 region_max_snapshots,u64 region_size)9268 devlink_port_region_create(struct devlink_port *port,
9269 const struct devlink_port_region_ops *ops,
9270 u32 region_max_snapshots, u64 region_size)
9271 {
9272 struct devlink *devlink = port->devlink;
9273 struct devlink_region *region;
9274 int err = 0;
9275
9276 if (WARN_ON(!ops) || WARN_ON(!ops->destructor))
9277 return ERR_PTR(-EINVAL);
9278
9279 mutex_lock(&devlink->lock);
9280
9281 if (devlink_port_region_get_by_name(port, ops->name)) {
9282 err = -EEXIST;
9283 goto unlock;
9284 }
9285
9286 region = kzalloc(sizeof(*region), GFP_KERNEL);
9287 if (!region) {
9288 err = -ENOMEM;
9289 goto unlock;
9290 }
9291
9292 region->devlink = devlink;
9293 region->port = port;
9294 region->max_snapshots = region_max_snapshots;
9295 region->port_ops = ops;
9296 region->size = region_size;
9297 INIT_LIST_HEAD(®ion->snapshot_list);
9298 list_add_tail(®ion->list, &port->region_list);
9299 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
9300
9301 mutex_unlock(&devlink->lock);
9302 return region;
9303
9304 unlock:
9305 mutex_unlock(&devlink->lock);
9306 return ERR_PTR(err);
9307 }
9308 EXPORT_SYMBOL_GPL(devlink_port_region_create);
9309
9310 /**
9311 * devlink_region_destroy - destroy address region
9312 *
9313 * @region: devlink region to destroy
9314 */
devlink_region_destroy(struct devlink_region * region)9315 void devlink_region_destroy(struct devlink_region *region)
9316 {
9317 struct devlink *devlink = region->devlink;
9318 struct devlink_snapshot *snapshot, *ts;
9319
9320 mutex_lock(&devlink->lock);
9321
9322 /* Free all snapshots of region */
9323 list_for_each_entry_safe(snapshot, ts, ®ion->snapshot_list, list)
9324 devlink_region_snapshot_del(region, snapshot);
9325
9326 list_del(®ion->list);
9327
9328 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
9329 mutex_unlock(&devlink->lock);
9330 kfree(region);
9331 }
9332 EXPORT_SYMBOL_GPL(devlink_region_destroy);
9333
9334 /**
9335 * devlink_region_snapshot_id_get - get snapshot ID
9336 *
9337 * This callback should be called when adding a new snapshot,
9338 * Driver should use the same id for multiple snapshots taken
9339 * on multiple regions at the same time/by the same trigger.
9340 *
9341 * The caller of this function must use devlink_region_snapshot_id_put
9342 * when finished creating regions using this id.
9343 *
9344 * Returns zero on success, or a negative error code on failure.
9345 *
9346 * @devlink: devlink
9347 * @id: storage to return id
9348 */
devlink_region_snapshot_id_get(struct devlink * devlink,u32 * id)9349 int devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
9350 {
9351 int err;
9352
9353 mutex_lock(&devlink->lock);
9354 err = __devlink_region_snapshot_id_get(devlink, id);
9355 mutex_unlock(&devlink->lock);
9356
9357 return err;
9358 }
9359 EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_get);
9360
9361 /**
9362 * devlink_region_snapshot_id_put - put snapshot ID reference
9363 *
9364 * This should be called by a driver after finishing creating snapshots
9365 * with an id. Doing so ensures that the ID can later be released in the
9366 * event that all snapshots using it have been destroyed.
9367 *
9368 * @devlink: devlink
9369 * @id: id to release reference on
9370 */
devlink_region_snapshot_id_put(struct devlink * devlink,u32 id)9371 void devlink_region_snapshot_id_put(struct devlink *devlink, u32 id)
9372 {
9373 mutex_lock(&devlink->lock);
9374 __devlink_snapshot_id_decrement(devlink, id);
9375 mutex_unlock(&devlink->lock);
9376 }
9377 EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_put);
9378
9379 /**
9380 * devlink_region_snapshot_create - create a new snapshot
9381 * This will add a new snapshot of a region. The snapshot
9382 * will be stored on the region struct and can be accessed
9383 * from devlink. This is useful for future analyses of snapshots.
9384 * Multiple snapshots can be created on a region.
9385 * The @snapshot_id should be obtained using the getter function.
9386 *
9387 * @region: devlink region of the snapshot
9388 * @data: snapshot data
9389 * @snapshot_id: snapshot id to be created
9390 */
devlink_region_snapshot_create(struct devlink_region * region,u8 * data,u32 snapshot_id)9391 int devlink_region_snapshot_create(struct devlink_region *region,
9392 u8 *data, u32 snapshot_id)
9393 {
9394 struct devlink *devlink = region->devlink;
9395 int err;
9396
9397 mutex_lock(&devlink->lock);
9398 err = __devlink_region_snapshot_create(region, data, snapshot_id);
9399 mutex_unlock(&devlink->lock);
9400
9401 return err;
9402 }
9403 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
9404
9405 #define DEVLINK_TRAP(_id, _type) \
9406 { \
9407 .type = DEVLINK_TRAP_TYPE_##_type, \
9408 .id = DEVLINK_TRAP_GENERIC_ID_##_id, \
9409 .name = DEVLINK_TRAP_GENERIC_NAME_##_id, \
9410 }
9411
9412 static const struct devlink_trap devlink_trap_generic[] = {
9413 DEVLINK_TRAP(SMAC_MC, DROP),
9414 DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
9415 DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
9416 DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
9417 DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
9418 DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
9419 DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
9420 DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
9421 DEVLINK_TRAP(TAIL_DROP, DROP),
9422 DEVLINK_TRAP(NON_IP_PACKET, DROP),
9423 DEVLINK_TRAP(UC_DIP_MC_DMAC, DROP),
9424 DEVLINK_TRAP(DIP_LB, DROP),
9425 DEVLINK_TRAP(SIP_MC, DROP),
9426 DEVLINK_TRAP(SIP_LB, DROP),
9427 DEVLINK_TRAP(CORRUPTED_IP_HDR, DROP),
9428 DEVLINK_TRAP(IPV4_SIP_BC, DROP),
9429 DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP),
9430 DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP),
9431 DEVLINK_TRAP(MTU_ERROR, EXCEPTION),
9432 DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION),
9433 DEVLINK_TRAP(RPF, EXCEPTION),
9434 DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION),
9435 DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION),
9436 DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION),
9437 DEVLINK_TRAP(NON_ROUTABLE, DROP),
9438 DEVLINK_TRAP(DECAP_ERROR, EXCEPTION),
9439 DEVLINK_TRAP(OVERLAY_SMAC_MC, DROP),
9440 DEVLINK_TRAP(INGRESS_FLOW_ACTION_DROP, DROP),
9441 DEVLINK_TRAP(EGRESS_FLOW_ACTION_DROP, DROP),
9442 DEVLINK_TRAP(STP, CONTROL),
9443 DEVLINK_TRAP(LACP, CONTROL),
9444 DEVLINK_TRAP(LLDP, CONTROL),
9445 DEVLINK_TRAP(IGMP_QUERY, CONTROL),
9446 DEVLINK_TRAP(IGMP_V1_REPORT, CONTROL),
9447 DEVLINK_TRAP(IGMP_V2_REPORT, CONTROL),
9448 DEVLINK_TRAP(IGMP_V3_REPORT, CONTROL),
9449 DEVLINK_TRAP(IGMP_V2_LEAVE, CONTROL),
9450 DEVLINK_TRAP(MLD_QUERY, CONTROL),
9451 DEVLINK_TRAP(MLD_V1_REPORT, CONTROL),
9452 DEVLINK_TRAP(MLD_V2_REPORT, CONTROL),
9453 DEVLINK_TRAP(MLD_V1_DONE, CONTROL),
9454 DEVLINK_TRAP(IPV4_DHCP, CONTROL),
9455 DEVLINK_TRAP(IPV6_DHCP, CONTROL),
9456 DEVLINK_TRAP(ARP_REQUEST, CONTROL),
9457 DEVLINK_TRAP(ARP_RESPONSE, CONTROL),
9458 DEVLINK_TRAP(ARP_OVERLAY, CONTROL),
9459 DEVLINK_TRAP(IPV6_NEIGH_SOLICIT, CONTROL),
9460 DEVLINK_TRAP(IPV6_NEIGH_ADVERT, CONTROL),
9461 DEVLINK_TRAP(IPV4_BFD, CONTROL),
9462 DEVLINK_TRAP(IPV6_BFD, CONTROL),
9463 DEVLINK_TRAP(IPV4_OSPF, CONTROL),
9464 DEVLINK_TRAP(IPV6_OSPF, CONTROL),
9465 DEVLINK_TRAP(IPV4_BGP, CONTROL),
9466 DEVLINK_TRAP(IPV6_BGP, CONTROL),
9467 DEVLINK_TRAP(IPV4_VRRP, CONTROL),
9468 DEVLINK_TRAP(IPV6_VRRP, CONTROL),
9469 DEVLINK_TRAP(IPV4_PIM, CONTROL),
9470 DEVLINK_TRAP(IPV6_PIM, CONTROL),
9471 DEVLINK_TRAP(UC_LB, CONTROL),
9472 DEVLINK_TRAP(LOCAL_ROUTE, CONTROL),
9473 DEVLINK_TRAP(EXTERNAL_ROUTE, CONTROL),
9474 DEVLINK_TRAP(IPV6_UC_DIP_LINK_LOCAL_SCOPE, CONTROL),
9475 DEVLINK_TRAP(IPV6_DIP_ALL_NODES, CONTROL),
9476 DEVLINK_TRAP(IPV6_DIP_ALL_ROUTERS, CONTROL),
9477 DEVLINK_TRAP(IPV6_ROUTER_SOLICIT, CONTROL),
9478 DEVLINK_TRAP(IPV6_ROUTER_ADVERT, CONTROL),
9479 DEVLINK_TRAP(IPV6_REDIRECT, CONTROL),
9480 DEVLINK_TRAP(IPV4_ROUTER_ALERT, CONTROL),
9481 DEVLINK_TRAP(IPV6_ROUTER_ALERT, CONTROL),
9482 DEVLINK_TRAP(PTP_EVENT, CONTROL),
9483 DEVLINK_TRAP(PTP_GENERAL, CONTROL),
9484 DEVLINK_TRAP(FLOW_ACTION_SAMPLE, CONTROL),
9485 DEVLINK_TRAP(FLOW_ACTION_TRAP, CONTROL),
9486 DEVLINK_TRAP(EARLY_DROP, DROP),
9487 DEVLINK_TRAP(VXLAN_PARSING, DROP),
9488 DEVLINK_TRAP(LLC_SNAP_PARSING, DROP),
9489 DEVLINK_TRAP(VLAN_PARSING, DROP),
9490 DEVLINK_TRAP(PPPOE_PPP_PARSING, DROP),
9491 DEVLINK_TRAP(MPLS_PARSING, DROP),
9492 DEVLINK_TRAP(ARP_PARSING, DROP),
9493 DEVLINK_TRAP(IP_1_PARSING, DROP),
9494 DEVLINK_TRAP(IP_N_PARSING, DROP),
9495 DEVLINK_TRAP(GRE_PARSING, DROP),
9496 DEVLINK_TRAP(UDP_PARSING, DROP),
9497 DEVLINK_TRAP(TCP_PARSING, DROP),
9498 DEVLINK_TRAP(IPSEC_PARSING, DROP),
9499 DEVLINK_TRAP(SCTP_PARSING, DROP),
9500 DEVLINK_TRAP(DCCP_PARSING, DROP),
9501 DEVLINK_TRAP(GTP_PARSING, DROP),
9502 DEVLINK_TRAP(ESP_PARSING, DROP),
9503 };
9504
9505 #define DEVLINK_TRAP_GROUP(_id) \
9506 { \
9507 .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id, \
9508 .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id, \
9509 }
9510
9511 static const struct devlink_trap_group devlink_trap_group_generic[] = {
9512 DEVLINK_TRAP_GROUP(L2_DROPS),
9513 DEVLINK_TRAP_GROUP(L3_DROPS),
9514 DEVLINK_TRAP_GROUP(L3_EXCEPTIONS),
9515 DEVLINK_TRAP_GROUP(BUFFER_DROPS),
9516 DEVLINK_TRAP_GROUP(TUNNEL_DROPS),
9517 DEVLINK_TRAP_GROUP(ACL_DROPS),
9518 DEVLINK_TRAP_GROUP(STP),
9519 DEVLINK_TRAP_GROUP(LACP),
9520 DEVLINK_TRAP_GROUP(LLDP),
9521 DEVLINK_TRAP_GROUP(MC_SNOOPING),
9522 DEVLINK_TRAP_GROUP(DHCP),
9523 DEVLINK_TRAP_GROUP(NEIGH_DISCOVERY),
9524 DEVLINK_TRAP_GROUP(BFD),
9525 DEVLINK_TRAP_GROUP(OSPF),
9526 DEVLINK_TRAP_GROUP(BGP),
9527 DEVLINK_TRAP_GROUP(VRRP),
9528 DEVLINK_TRAP_GROUP(PIM),
9529 DEVLINK_TRAP_GROUP(UC_LB),
9530 DEVLINK_TRAP_GROUP(LOCAL_DELIVERY),
9531 DEVLINK_TRAP_GROUP(EXTERNAL_DELIVERY),
9532 DEVLINK_TRAP_GROUP(IPV6),
9533 DEVLINK_TRAP_GROUP(PTP_EVENT),
9534 DEVLINK_TRAP_GROUP(PTP_GENERAL),
9535 DEVLINK_TRAP_GROUP(ACL_SAMPLE),
9536 DEVLINK_TRAP_GROUP(ACL_TRAP),
9537 DEVLINK_TRAP_GROUP(PARSER_ERROR_DROPS),
9538 };
9539
devlink_trap_generic_verify(const struct devlink_trap * trap)9540 static int devlink_trap_generic_verify(const struct devlink_trap *trap)
9541 {
9542 if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
9543 return -EINVAL;
9544
9545 if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
9546 return -EINVAL;
9547
9548 if (trap->type != devlink_trap_generic[trap->id].type)
9549 return -EINVAL;
9550
9551 return 0;
9552 }
9553
devlink_trap_driver_verify(const struct devlink_trap * trap)9554 static int devlink_trap_driver_verify(const struct devlink_trap *trap)
9555 {
9556 int i;
9557
9558 if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
9559 return -EINVAL;
9560
9561 for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
9562 if (!strcmp(trap->name, devlink_trap_generic[i].name))
9563 return -EEXIST;
9564 }
9565
9566 return 0;
9567 }
9568
devlink_trap_verify(const struct devlink_trap * trap)9569 static int devlink_trap_verify(const struct devlink_trap *trap)
9570 {
9571 if (!trap || !trap->name)
9572 return -EINVAL;
9573
9574 if (trap->generic)
9575 return devlink_trap_generic_verify(trap);
9576 else
9577 return devlink_trap_driver_verify(trap);
9578 }
9579
9580 static int
devlink_trap_group_generic_verify(const struct devlink_trap_group * group)9581 devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
9582 {
9583 if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
9584 return -EINVAL;
9585
9586 if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
9587 return -EINVAL;
9588
9589 return 0;
9590 }
9591
9592 static int
devlink_trap_group_driver_verify(const struct devlink_trap_group * group)9593 devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
9594 {
9595 int i;
9596
9597 if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
9598 return -EINVAL;
9599
9600 for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
9601 if (!strcmp(group->name, devlink_trap_group_generic[i].name))
9602 return -EEXIST;
9603 }
9604
9605 return 0;
9606 }
9607
devlink_trap_group_verify(const struct devlink_trap_group * group)9608 static int devlink_trap_group_verify(const struct devlink_trap_group *group)
9609 {
9610 if (group->generic)
9611 return devlink_trap_group_generic_verify(group);
9612 else
9613 return devlink_trap_group_driver_verify(group);
9614 }
9615
9616 static void
devlink_trap_group_notify(struct devlink * devlink,const struct devlink_trap_group_item * group_item,enum devlink_command cmd)9617 devlink_trap_group_notify(struct devlink *devlink,
9618 const struct devlink_trap_group_item *group_item,
9619 enum devlink_command cmd)
9620 {
9621 struct sk_buff *msg;
9622 int err;
9623
9624 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
9625 cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
9626
9627 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9628 if (!msg)
9629 return;
9630
9631 err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
9632 0);
9633 if (err) {
9634 nlmsg_free(msg);
9635 return;
9636 }
9637
9638 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
9639 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
9640 }
9641
9642 static int
devlink_trap_item_group_link(struct devlink * devlink,struct devlink_trap_item * trap_item)9643 devlink_trap_item_group_link(struct devlink *devlink,
9644 struct devlink_trap_item *trap_item)
9645 {
9646 u16 group_id = trap_item->trap->init_group_id;
9647 struct devlink_trap_group_item *group_item;
9648
9649 group_item = devlink_trap_group_item_lookup_by_id(devlink, group_id);
9650 if (WARN_ON_ONCE(!group_item))
9651 return -EINVAL;
9652
9653 trap_item->group_item = group_item;
9654
9655 return 0;
9656 }
9657
devlink_trap_notify(struct devlink * devlink,const struct devlink_trap_item * trap_item,enum devlink_command cmd)9658 static void devlink_trap_notify(struct devlink *devlink,
9659 const struct devlink_trap_item *trap_item,
9660 enum devlink_command cmd)
9661 {
9662 struct sk_buff *msg;
9663 int err;
9664
9665 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
9666 cmd != DEVLINK_CMD_TRAP_DEL);
9667
9668 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9669 if (!msg)
9670 return;
9671
9672 err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
9673 if (err) {
9674 nlmsg_free(msg);
9675 return;
9676 }
9677
9678 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
9679 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
9680 }
9681
9682 static int
devlink_trap_register(struct devlink * devlink,const struct devlink_trap * trap,void * priv)9683 devlink_trap_register(struct devlink *devlink,
9684 const struct devlink_trap *trap, void *priv)
9685 {
9686 struct devlink_trap_item *trap_item;
9687 int err;
9688
9689 if (devlink_trap_item_lookup(devlink, trap->name))
9690 return -EEXIST;
9691
9692 trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
9693 if (!trap_item)
9694 return -ENOMEM;
9695
9696 trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
9697 if (!trap_item->stats) {
9698 err = -ENOMEM;
9699 goto err_stats_alloc;
9700 }
9701
9702 trap_item->trap = trap;
9703 trap_item->action = trap->init_action;
9704 trap_item->priv = priv;
9705
9706 err = devlink_trap_item_group_link(devlink, trap_item);
9707 if (err)
9708 goto err_group_link;
9709
9710 err = devlink->ops->trap_init(devlink, trap, trap_item);
9711 if (err)
9712 goto err_trap_init;
9713
9714 list_add_tail(&trap_item->list, &devlink->trap_list);
9715 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
9716
9717 return 0;
9718
9719 err_trap_init:
9720 err_group_link:
9721 free_percpu(trap_item->stats);
9722 err_stats_alloc:
9723 kfree(trap_item);
9724 return err;
9725 }
9726
devlink_trap_unregister(struct devlink * devlink,const struct devlink_trap * trap)9727 static void devlink_trap_unregister(struct devlink *devlink,
9728 const struct devlink_trap *trap)
9729 {
9730 struct devlink_trap_item *trap_item;
9731
9732 trap_item = devlink_trap_item_lookup(devlink, trap->name);
9733 if (WARN_ON_ONCE(!trap_item))
9734 return;
9735
9736 devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
9737 list_del(&trap_item->list);
9738 if (devlink->ops->trap_fini)
9739 devlink->ops->trap_fini(devlink, trap, trap_item);
9740 free_percpu(trap_item->stats);
9741 kfree(trap_item);
9742 }
9743
devlink_trap_disable(struct devlink * devlink,const struct devlink_trap * trap)9744 static void devlink_trap_disable(struct devlink *devlink,
9745 const struct devlink_trap *trap)
9746 {
9747 struct devlink_trap_item *trap_item;
9748
9749 trap_item = devlink_trap_item_lookup(devlink, trap->name);
9750 if (WARN_ON_ONCE(!trap_item))
9751 return;
9752
9753 devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP,
9754 NULL);
9755 trap_item->action = DEVLINK_TRAP_ACTION_DROP;
9756 }
9757
9758 /**
9759 * devlink_traps_register - Register packet traps with devlink.
9760 * @devlink: devlink.
9761 * @traps: Packet traps.
9762 * @traps_count: Count of provided packet traps.
9763 * @priv: Driver private information.
9764 *
9765 * Return: Non-zero value on failure.
9766 */
devlink_traps_register(struct devlink * devlink,const struct devlink_trap * traps,size_t traps_count,void * priv)9767 int devlink_traps_register(struct devlink *devlink,
9768 const struct devlink_trap *traps,
9769 size_t traps_count, void *priv)
9770 {
9771 int i, err;
9772
9773 if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
9774 return -EINVAL;
9775
9776 mutex_lock(&devlink->lock);
9777 for (i = 0; i < traps_count; i++) {
9778 const struct devlink_trap *trap = &traps[i];
9779
9780 err = devlink_trap_verify(trap);
9781 if (err)
9782 goto err_trap_verify;
9783
9784 err = devlink_trap_register(devlink, trap, priv);
9785 if (err)
9786 goto err_trap_register;
9787 }
9788 mutex_unlock(&devlink->lock);
9789
9790 return 0;
9791
9792 err_trap_register:
9793 err_trap_verify:
9794 for (i--; i >= 0; i--)
9795 devlink_trap_unregister(devlink, &traps[i]);
9796 mutex_unlock(&devlink->lock);
9797 return err;
9798 }
9799 EXPORT_SYMBOL_GPL(devlink_traps_register);
9800
9801 /**
9802 * devlink_traps_unregister - Unregister packet traps from devlink.
9803 * @devlink: devlink.
9804 * @traps: Packet traps.
9805 * @traps_count: Count of provided packet traps.
9806 */
devlink_traps_unregister(struct devlink * devlink,const struct devlink_trap * traps,size_t traps_count)9807 void devlink_traps_unregister(struct devlink *devlink,
9808 const struct devlink_trap *traps,
9809 size_t traps_count)
9810 {
9811 int i;
9812
9813 mutex_lock(&devlink->lock);
9814 /* Make sure we do not have any packets in-flight while unregistering
9815 * traps by disabling all of them and waiting for a grace period.
9816 */
9817 for (i = traps_count - 1; i >= 0; i--)
9818 devlink_trap_disable(devlink, &traps[i]);
9819 synchronize_rcu();
9820 for (i = traps_count - 1; i >= 0; i--)
9821 devlink_trap_unregister(devlink, &traps[i]);
9822 mutex_unlock(&devlink->lock);
9823 }
9824 EXPORT_SYMBOL_GPL(devlink_traps_unregister);
9825
9826 static void
devlink_trap_stats_update(struct devlink_stats __percpu * trap_stats,size_t skb_len)9827 devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
9828 size_t skb_len)
9829 {
9830 struct devlink_stats *stats;
9831
9832 stats = this_cpu_ptr(trap_stats);
9833 u64_stats_update_begin(&stats->syncp);
9834 stats->rx_bytes += skb_len;
9835 stats->rx_packets++;
9836 u64_stats_update_end(&stats->syncp);
9837 }
9838
9839 static void
devlink_trap_report_metadata_set(struct devlink_trap_metadata * metadata,const struct devlink_trap_item * trap_item,struct devlink_port * in_devlink_port,const struct flow_action_cookie * fa_cookie)9840 devlink_trap_report_metadata_set(struct devlink_trap_metadata *metadata,
9841 const struct devlink_trap_item *trap_item,
9842 struct devlink_port *in_devlink_port,
9843 const struct flow_action_cookie *fa_cookie)
9844 {
9845 metadata->trap_name = trap_item->trap->name;
9846 metadata->trap_group_name = trap_item->group_item->group->name;
9847 metadata->fa_cookie = fa_cookie;
9848 metadata->trap_type = trap_item->trap->type;
9849
9850 spin_lock(&in_devlink_port->type_lock);
9851 if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
9852 metadata->input_dev = in_devlink_port->type_dev;
9853 spin_unlock(&in_devlink_port->type_lock);
9854 }
9855
9856 /**
9857 * devlink_trap_report - Report trapped packet to drop monitor.
9858 * @devlink: devlink.
9859 * @skb: Trapped packet.
9860 * @trap_ctx: Trap context.
9861 * @in_devlink_port: Input devlink port.
9862 * @fa_cookie: Flow action cookie. Could be NULL.
9863 */
devlink_trap_report(struct devlink * devlink,struct sk_buff * skb,void * trap_ctx,struct devlink_port * in_devlink_port,const struct flow_action_cookie * fa_cookie)9864 void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
9865 void *trap_ctx, struct devlink_port *in_devlink_port,
9866 const struct flow_action_cookie *fa_cookie)
9867
9868 {
9869 struct devlink_trap_item *trap_item = trap_ctx;
9870
9871 devlink_trap_stats_update(trap_item->stats, skb->len);
9872 devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
9873
9874 if (trace_devlink_trap_report_enabled()) {
9875 struct devlink_trap_metadata metadata = {};
9876
9877 devlink_trap_report_metadata_set(&metadata, trap_item,
9878 in_devlink_port, fa_cookie);
9879 trace_devlink_trap_report(devlink, skb, &metadata);
9880 }
9881 }
9882 EXPORT_SYMBOL_GPL(devlink_trap_report);
9883
9884 /**
9885 * devlink_trap_ctx_priv - Trap context to driver private information.
9886 * @trap_ctx: Trap context.
9887 *
9888 * Return: Driver private information passed during registration.
9889 */
devlink_trap_ctx_priv(void * trap_ctx)9890 void *devlink_trap_ctx_priv(void *trap_ctx)
9891 {
9892 struct devlink_trap_item *trap_item = trap_ctx;
9893
9894 return trap_item->priv;
9895 }
9896 EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
9897
9898 static int
devlink_trap_group_item_policer_link(struct devlink * devlink,struct devlink_trap_group_item * group_item)9899 devlink_trap_group_item_policer_link(struct devlink *devlink,
9900 struct devlink_trap_group_item *group_item)
9901 {
9902 u32 policer_id = group_item->group->init_policer_id;
9903 struct devlink_trap_policer_item *policer_item;
9904
9905 if (policer_id == 0)
9906 return 0;
9907
9908 policer_item = devlink_trap_policer_item_lookup(devlink, policer_id);
9909 if (WARN_ON_ONCE(!policer_item))
9910 return -EINVAL;
9911
9912 group_item->policer_item = policer_item;
9913
9914 return 0;
9915 }
9916
9917 static int
devlink_trap_group_register(struct devlink * devlink,const struct devlink_trap_group * group)9918 devlink_trap_group_register(struct devlink *devlink,
9919 const struct devlink_trap_group *group)
9920 {
9921 struct devlink_trap_group_item *group_item;
9922 int err;
9923
9924 if (devlink_trap_group_item_lookup(devlink, group->name))
9925 return -EEXIST;
9926
9927 group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
9928 if (!group_item)
9929 return -ENOMEM;
9930
9931 group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
9932 if (!group_item->stats) {
9933 err = -ENOMEM;
9934 goto err_stats_alloc;
9935 }
9936
9937 group_item->group = group;
9938
9939 err = devlink_trap_group_item_policer_link(devlink, group_item);
9940 if (err)
9941 goto err_policer_link;
9942
9943 if (devlink->ops->trap_group_init) {
9944 err = devlink->ops->trap_group_init(devlink, group);
9945 if (err)
9946 goto err_group_init;
9947 }
9948
9949 list_add_tail(&group_item->list, &devlink->trap_group_list);
9950 devlink_trap_group_notify(devlink, group_item,
9951 DEVLINK_CMD_TRAP_GROUP_NEW);
9952
9953 return 0;
9954
9955 err_group_init:
9956 err_policer_link:
9957 free_percpu(group_item->stats);
9958 err_stats_alloc:
9959 kfree(group_item);
9960 return err;
9961 }
9962
9963 static void
devlink_trap_group_unregister(struct devlink * devlink,const struct devlink_trap_group * group)9964 devlink_trap_group_unregister(struct devlink *devlink,
9965 const struct devlink_trap_group *group)
9966 {
9967 struct devlink_trap_group_item *group_item;
9968
9969 group_item = devlink_trap_group_item_lookup(devlink, group->name);
9970 if (WARN_ON_ONCE(!group_item))
9971 return;
9972
9973 devlink_trap_group_notify(devlink, group_item,
9974 DEVLINK_CMD_TRAP_GROUP_DEL);
9975 list_del(&group_item->list);
9976 free_percpu(group_item->stats);
9977 kfree(group_item);
9978 }
9979
9980 /**
9981 * devlink_trap_groups_register - Register packet trap groups with devlink.
9982 * @devlink: devlink.
9983 * @groups: Packet trap groups.
9984 * @groups_count: Count of provided packet trap groups.
9985 *
9986 * Return: Non-zero value on failure.
9987 */
devlink_trap_groups_register(struct devlink * devlink,const struct devlink_trap_group * groups,size_t groups_count)9988 int devlink_trap_groups_register(struct devlink *devlink,
9989 const struct devlink_trap_group *groups,
9990 size_t groups_count)
9991 {
9992 int i, err;
9993
9994 mutex_lock(&devlink->lock);
9995 for (i = 0; i < groups_count; i++) {
9996 const struct devlink_trap_group *group = &groups[i];
9997
9998 err = devlink_trap_group_verify(group);
9999 if (err)
10000 goto err_trap_group_verify;
10001
10002 err = devlink_trap_group_register(devlink, group);
10003 if (err)
10004 goto err_trap_group_register;
10005 }
10006 mutex_unlock(&devlink->lock);
10007
10008 return 0;
10009
10010 err_trap_group_register:
10011 err_trap_group_verify:
10012 for (i--; i >= 0; i--)
10013 devlink_trap_group_unregister(devlink, &groups[i]);
10014 mutex_unlock(&devlink->lock);
10015 return err;
10016 }
10017 EXPORT_SYMBOL_GPL(devlink_trap_groups_register);
10018
10019 /**
10020 * devlink_trap_groups_unregister - Unregister packet trap groups from devlink.
10021 * @devlink: devlink.
10022 * @groups: Packet trap groups.
10023 * @groups_count: Count of provided packet trap groups.
10024 */
devlink_trap_groups_unregister(struct devlink * devlink,const struct devlink_trap_group * groups,size_t groups_count)10025 void devlink_trap_groups_unregister(struct devlink *devlink,
10026 const struct devlink_trap_group *groups,
10027 size_t groups_count)
10028 {
10029 int i;
10030
10031 mutex_lock(&devlink->lock);
10032 for (i = groups_count - 1; i >= 0; i--)
10033 devlink_trap_group_unregister(devlink, &groups[i]);
10034 mutex_unlock(&devlink->lock);
10035 }
10036 EXPORT_SYMBOL_GPL(devlink_trap_groups_unregister);
10037
10038 static void
devlink_trap_policer_notify(struct devlink * devlink,const struct devlink_trap_policer_item * policer_item,enum devlink_command cmd)10039 devlink_trap_policer_notify(struct devlink *devlink,
10040 const struct devlink_trap_policer_item *policer_item,
10041 enum devlink_command cmd)
10042 {
10043 struct sk_buff *msg;
10044 int err;
10045
10046 WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_POLICER_NEW &&
10047 cmd != DEVLINK_CMD_TRAP_POLICER_DEL);
10048
10049 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10050 if (!msg)
10051 return;
10052
10053 err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, cmd, 0,
10054 0, 0);
10055 if (err) {
10056 nlmsg_free(msg);
10057 return;
10058 }
10059
10060 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
10061 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
10062 }
10063
10064 static int
devlink_trap_policer_register(struct devlink * devlink,const struct devlink_trap_policer * policer)10065 devlink_trap_policer_register(struct devlink *devlink,
10066 const struct devlink_trap_policer *policer)
10067 {
10068 struct devlink_trap_policer_item *policer_item;
10069 int err;
10070
10071 if (devlink_trap_policer_item_lookup(devlink, policer->id))
10072 return -EEXIST;
10073
10074 policer_item = kzalloc(sizeof(*policer_item), GFP_KERNEL);
10075 if (!policer_item)
10076 return -ENOMEM;
10077
10078 policer_item->policer = policer;
10079 policer_item->rate = policer->init_rate;
10080 policer_item->burst = policer->init_burst;
10081
10082 if (devlink->ops->trap_policer_init) {
10083 err = devlink->ops->trap_policer_init(devlink, policer);
10084 if (err)
10085 goto err_policer_init;
10086 }
10087
10088 list_add_tail(&policer_item->list, &devlink->trap_policer_list);
10089 devlink_trap_policer_notify(devlink, policer_item,
10090 DEVLINK_CMD_TRAP_POLICER_NEW);
10091
10092 return 0;
10093
10094 err_policer_init:
10095 kfree(policer_item);
10096 return err;
10097 }
10098
10099 static void
devlink_trap_policer_unregister(struct devlink * devlink,const struct devlink_trap_policer * policer)10100 devlink_trap_policer_unregister(struct devlink *devlink,
10101 const struct devlink_trap_policer *policer)
10102 {
10103 struct devlink_trap_policer_item *policer_item;
10104
10105 policer_item = devlink_trap_policer_item_lookup(devlink, policer->id);
10106 if (WARN_ON_ONCE(!policer_item))
10107 return;
10108
10109 devlink_trap_policer_notify(devlink, policer_item,
10110 DEVLINK_CMD_TRAP_POLICER_DEL);
10111 list_del(&policer_item->list);
10112 if (devlink->ops->trap_policer_fini)
10113 devlink->ops->trap_policer_fini(devlink, policer);
10114 kfree(policer_item);
10115 }
10116
10117 /**
10118 * devlink_trap_policers_register - Register packet trap policers with devlink.
10119 * @devlink: devlink.
10120 * @policers: Packet trap policers.
10121 * @policers_count: Count of provided packet trap policers.
10122 *
10123 * Return: Non-zero value on failure.
10124 */
10125 int
devlink_trap_policers_register(struct devlink * devlink,const struct devlink_trap_policer * policers,size_t policers_count)10126 devlink_trap_policers_register(struct devlink *devlink,
10127 const struct devlink_trap_policer *policers,
10128 size_t policers_count)
10129 {
10130 int i, err;
10131
10132 mutex_lock(&devlink->lock);
10133 for (i = 0; i < policers_count; i++) {
10134 const struct devlink_trap_policer *policer = &policers[i];
10135
10136 if (WARN_ON(policer->id == 0 ||
10137 policer->max_rate < policer->min_rate ||
10138 policer->max_burst < policer->min_burst)) {
10139 err = -EINVAL;
10140 goto err_trap_policer_verify;
10141 }
10142
10143 err = devlink_trap_policer_register(devlink, policer);
10144 if (err)
10145 goto err_trap_policer_register;
10146 }
10147 mutex_unlock(&devlink->lock);
10148
10149 return 0;
10150
10151 err_trap_policer_register:
10152 err_trap_policer_verify:
10153 for (i--; i >= 0; i--)
10154 devlink_trap_policer_unregister(devlink, &policers[i]);
10155 mutex_unlock(&devlink->lock);
10156 return err;
10157 }
10158 EXPORT_SYMBOL_GPL(devlink_trap_policers_register);
10159
10160 /**
10161 * devlink_trap_policers_unregister - Unregister packet trap policers from devlink.
10162 * @devlink: devlink.
10163 * @policers: Packet trap policers.
10164 * @policers_count: Count of provided packet trap policers.
10165 */
10166 void
devlink_trap_policers_unregister(struct devlink * devlink,const struct devlink_trap_policer * policers,size_t policers_count)10167 devlink_trap_policers_unregister(struct devlink *devlink,
10168 const struct devlink_trap_policer *policers,
10169 size_t policers_count)
10170 {
10171 int i;
10172
10173 mutex_lock(&devlink->lock);
10174 for (i = policers_count - 1; i >= 0; i--)
10175 devlink_trap_policer_unregister(devlink, &policers[i]);
10176 mutex_unlock(&devlink->lock);
10177 }
10178 EXPORT_SYMBOL_GPL(devlink_trap_policers_unregister);
10179
__devlink_compat_running_version(struct devlink * devlink,char * buf,size_t len)10180 static void __devlink_compat_running_version(struct devlink *devlink,
10181 char *buf, size_t len)
10182 {
10183 const struct nlattr *nlattr;
10184 struct devlink_info_req req;
10185 struct sk_buff *msg;
10186 int rem, err;
10187
10188 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10189 if (!msg)
10190 return;
10191
10192 req.msg = msg;
10193 err = devlink->ops->info_get(devlink, &req, NULL);
10194 if (err)
10195 goto free_msg;
10196
10197 nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
10198 const struct nlattr *kv;
10199 int rem_kv;
10200
10201 if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
10202 continue;
10203
10204 nla_for_each_nested(kv, nlattr, rem_kv) {
10205 if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
10206 continue;
10207
10208 strlcat(buf, nla_data(kv), len);
10209 strlcat(buf, " ", len);
10210 }
10211 }
10212 free_msg:
10213 nlmsg_free(msg);
10214 }
10215
devlink_compat_running_version(struct net_device * dev,char * buf,size_t len)10216 void devlink_compat_running_version(struct net_device *dev,
10217 char *buf, size_t len)
10218 {
10219 struct devlink *devlink;
10220
10221 dev_hold(dev);
10222 rtnl_unlock();
10223
10224 devlink = netdev_to_devlink(dev);
10225 if (!devlink || !devlink->ops->info_get)
10226 goto out;
10227
10228 mutex_lock(&devlink->lock);
10229 __devlink_compat_running_version(devlink, buf, len);
10230 mutex_unlock(&devlink->lock);
10231
10232 out:
10233 rtnl_lock();
10234 dev_put(dev);
10235 }
10236
devlink_compat_flash_update(struct net_device * dev,const char * file_name)10237 int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
10238 {
10239 struct devlink_flash_update_params params = {};
10240 struct devlink *devlink;
10241 int ret;
10242
10243 dev_hold(dev);
10244 rtnl_unlock();
10245
10246 devlink = netdev_to_devlink(dev);
10247 if (!devlink || !devlink->ops->flash_update) {
10248 ret = -EOPNOTSUPP;
10249 goto out;
10250 }
10251
10252 params.file_name = file_name;
10253
10254 mutex_lock(&devlink->lock);
10255 ret = devlink->ops->flash_update(devlink, ¶ms, NULL);
10256 mutex_unlock(&devlink->lock);
10257
10258 out:
10259 rtnl_lock();
10260 dev_put(dev);
10261
10262 return ret;
10263 }
10264
devlink_compat_phys_port_name_get(struct net_device * dev,char * name,size_t len)10265 int devlink_compat_phys_port_name_get(struct net_device *dev,
10266 char *name, size_t len)
10267 {
10268 struct devlink_port *devlink_port;
10269
10270 /* RTNL mutex is held here which ensures that devlink_port
10271 * instance cannot disappear in the middle. No need to take
10272 * any devlink lock as only permanent values are accessed.
10273 */
10274 ASSERT_RTNL();
10275
10276 devlink_port = netdev_to_devlink_port(dev);
10277 if (!devlink_port)
10278 return -EOPNOTSUPP;
10279
10280 return __devlink_port_phys_port_name_get(devlink_port, name, len);
10281 }
10282
devlink_compat_switch_id_get(struct net_device * dev,struct netdev_phys_item_id * ppid)10283 int devlink_compat_switch_id_get(struct net_device *dev,
10284 struct netdev_phys_item_id *ppid)
10285 {
10286 struct devlink_port *devlink_port;
10287
10288 /* Caller must hold RTNL mutex or reference to dev, which ensures that
10289 * devlink_port instance cannot disappear in the middle. No need to take
10290 * any devlink lock as only permanent values are accessed.
10291 */
10292 devlink_port = netdev_to_devlink_port(dev);
10293 if (!devlink_port || !devlink_port->switch_port)
10294 return -EOPNOTSUPP;
10295
10296 memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
10297
10298 return 0;
10299 }
10300
devlink_pernet_pre_exit(struct net * net)10301 static void __net_exit devlink_pernet_pre_exit(struct net *net)
10302 {
10303 struct devlink *devlink;
10304 u32 actions_performed;
10305 int err;
10306
10307 /* In case network namespace is getting destroyed, reload
10308 * all devlink instances from this namespace into init_net.
10309 */
10310 mutex_lock(&devlink_mutex);
10311 list_for_each_entry(devlink, &devlink_list, list) {
10312 if (net_eq(devlink_net(devlink), net)) {
10313 if (WARN_ON(!devlink_reload_supported(devlink->ops)))
10314 continue;
10315 err = devlink_reload(devlink, &init_net,
10316 DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
10317 DEVLINK_RELOAD_LIMIT_UNSPEC,
10318 &actions_performed, NULL);
10319 if (err && err != -EOPNOTSUPP)
10320 pr_warn("Failed to reload devlink instance into init_net\n");
10321 }
10322 }
10323 mutex_unlock(&devlink_mutex);
10324 }
10325
10326 static struct pernet_operations devlink_pernet_ops __net_initdata = {
10327 .pre_exit = devlink_pernet_pre_exit,
10328 };
10329
devlink_init(void)10330 static int __init devlink_init(void)
10331 {
10332 int err;
10333
10334 err = genl_register_family(&devlink_nl_family);
10335 if (err)
10336 goto out;
10337 err = register_pernet_subsys(&devlink_pernet_ops);
10338
10339 out:
10340 WARN_ON(err);
10341 return err;
10342 }
10343
10344 subsys_initcall(devlink_init);
10345
