1 /*
2 * net/core/devlink.c - Network physical/parent device Netlink interface
3 *
4 * Heavily inspired by net/wireless/
5 * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
6 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/gfp.h>
19 #include <linux/device.h>
20 #include <linux/list.h>
21 #include <linux/netdevice.h>
22 #include <rdma/ib_verbs.h>
23 #include <net/netlink.h>
24 #include <net/genetlink.h>
25 #include <net/rtnetlink.h>
26 #include <net/net_namespace.h>
27 #include <net/sock.h>
28 #include <net/devlink.h>
29 #define CREATE_TRACE_POINTS
30 #include <trace/events/devlink.h>
31
32 static struct devlink_dpipe_field devlink_dpipe_fields_ethernet[] = {
33 {
34 .name = "destination mac",
35 .id = DEVLINK_DPIPE_FIELD_ETHERNET_DST_MAC,
36 .bitwidth = 48,
37 },
38 };
39
40 struct devlink_dpipe_header devlink_dpipe_header_ethernet = {
41 .name = "ethernet",
42 .id = DEVLINK_DPIPE_HEADER_ETHERNET,
43 .fields = devlink_dpipe_fields_ethernet,
44 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet),
45 .global = true,
46 };
47 EXPORT_SYMBOL(devlink_dpipe_header_ethernet);
48
49 static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = {
50 {
51 .name = "destination ip",
52 .id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP,
53 .bitwidth = 32,
54 },
55 };
56
57 struct devlink_dpipe_header devlink_dpipe_header_ipv4 = {
58 .name = "ipv4",
59 .id = DEVLINK_DPIPE_HEADER_IPV4,
60 .fields = devlink_dpipe_fields_ipv4,
61 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4),
62 .global = true,
63 };
64 EXPORT_SYMBOL(devlink_dpipe_header_ipv4);
65
66 static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = {
67 {
68 .name = "destination ip",
69 .id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP,
70 .bitwidth = 128,
71 },
72 };
73
74 struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
75 .name = "ipv6",
76 .id = DEVLINK_DPIPE_HEADER_IPV6,
77 .fields = devlink_dpipe_fields_ipv6,
78 .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6),
79 .global = true,
80 };
81 EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
82
83 EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
84
85 static LIST_HEAD(devlink_list);
86
87 /* devlink_mutex
88 *
89 * An overall lock guarding every operation coming from userspace.
90 * It also guards devlink devices list and it is taken when
91 * driver registers/unregisters it.
92 */
93 static DEFINE_MUTEX(devlink_mutex);
94
devlink_net(const struct devlink * devlink)95 static struct net *devlink_net(const struct devlink *devlink)
96 {
97 return read_pnet(&devlink->_net);
98 }
99
devlink_net_set(struct devlink * devlink,struct net * net)100 static void devlink_net_set(struct devlink *devlink, struct net *net)
101 {
102 write_pnet(&devlink->_net, net);
103 }
104
devlink_get_from_attrs(struct net * net,struct nlattr ** attrs)105 static struct devlink *devlink_get_from_attrs(struct net *net,
106 struct nlattr **attrs)
107 {
108 struct devlink *devlink;
109 char *busname;
110 char *devname;
111
112 if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
113 return ERR_PTR(-EINVAL);
114
115 busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
116 devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
117
118 list_for_each_entry(devlink, &devlink_list, list) {
119 if (strcmp(devlink->dev->bus->name, busname) == 0 &&
120 strcmp(dev_name(devlink->dev), devname) == 0 &&
121 net_eq(devlink_net(devlink), net))
122 return devlink;
123 }
124
125 return ERR_PTR(-ENODEV);
126 }
127
devlink_get_from_info(struct genl_info * info)128 static struct devlink *devlink_get_from_info(struct genl_info *info)
129 {
130 return devlink_get_from_attrs(genl_info_net(info), info->attrs);
131 }
132
devlink_port_get_by_index(struct devlink * devlink,int port_index)133 static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
134 int port_index)
135 {
136 struct devlink_port *devlink_port;
137
138 list_for_each_entry(devlink_port, &devlink->port_list, list) {
139 if (devlink_port->index == port_index)
140 return devlink_port;
141 }
142 return NULL;
143 }
144
devlink_port_index_exists(struct devlink * devlink,int port_index)145 static bool devlink_port_index_exists(struct devlink *devlink, int port_index)
146 {
147 return devlink_port_get_by_index(devlink, port_index);
148 }
149
devlink_port_get_from_attrs(struct devlink * devlink,struct nlattr ** attrs)150 static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
151 struct nlattr **attrs)
152 {
153 if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
154 u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
155 struct devlink_port *devlink_port;
156
157 devlink_port = devlink_port_get_by_index(devlink, port_index);
158 if (!devlink_port)
159 return ERR_PTR(-ENODEV);
160 return devlink_port;
161 }
162 return ERR_PTR(-EINVAL);
163 }
164
devlink_port_get_from_info(struct devlink * devlink,struct genl_info * info)165 static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
166 struct genl_info *info)
167 {
168 return devlink_port_get_from_attrs(devlink, info->attrs);
169 }
170
171 struct devlink_sb {
172 struct list_head list;
173 unsigned int index;
174 u32 size;
175 u16 ingress_pools_count;
176 u16 egress_pools_count;
177 u16 ingress_tc_count;
178 u16 egress_tc_count;
179 };
180
devlink_sb_pool_count(struct devlink_sb * devlink_sb)181 static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
182 {
183 return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
184 }
185
devlink_sb_get_by_index(struct devlink * devlink,unsigned int sb_index)186 static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
187 unsigned int sb_index)
188 {
189 struct devlink_sb *devlink_sb;
190
191 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
192 if (devlink_sb->index == sb_index)
193 return devlink_sb;
194 }
195 return NULL;
196 }
197
devlink_sb_index_exists(struct devlink * devlink,unsigned int sb_index)198 static bool devlink_sb_index_exists(struct devlink *devlink,
199 unsigned int sb_index)
200 {
201 return devlink_sb_get_by_index(devlink, sb_index);
202 }
203
devlink_sb_get_from_attrs(struct devlink * devlink,struct nlattr ** attrs)204 static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
205 struct nlattr **attrs)
206 {
207 if (attrs[DEVLINK_ATTR_SB_INDEX]) {
208 u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
209 struct devlink_sb *devlink_sb;
210
211 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
212 if (!devlink_sb)
213 return ERR_PTR(-ENODEV);
214 return devlink_sb;
215 }
216 return ERR_PTR(-EINVAL);
217 }
218
devlink_sb_get_from_info(struct devlink * devlink,struct genl_info * info)219 static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
220 struct genl_info *info)
221 {
222 return devlink_sb_get_from_attrs(devlink, info->attrs);
223 }
224
devlink_sb_pool_index_get_from_attrs(struct devlink_sb * devlink_sb,struct nlattr ** attrs,u16 * p_pool_index)225 static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
226 struct nlattr **attrs,
227 u16 *p_pool_index)
228 {
229 u16 val;
230
231 if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
232 return -EINVAL;
233
234 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
235 if (val >= devlink_sb_pool_count(devlink_sb))
236 return -EINVAL;
237 *p_pool_index = val;
238 return 0;
239 }
240
devlink_sb_pool_index_get_from_info(struct devlink_sb * devlink_sb,struct genl_info * info,u16 * p_pool_index)241 static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
242 struct genl_info *info,
243 u16 *p_pool_index)
244 {
245 return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
246 p_pool_index);
247 }
248
249 static int
devlink_sb_pool_type_get_from_attrs(struct nlattr ** attrs,enum devlink_sb_pool_type * p_pool_type)250 devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
251 enum devlink_sb_pool_type *p_pool_type)
252 {
253 u8 val;
254
255 if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
256 return -EINVAL;
257
258 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
259 if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
260 val != DEVLINK_SB_POOL_TYPE_EGRESS)
261 return -EINVAL;
262 *p_pool_type = val;
263 return 0;
264 }
265
266 static int
devlink_sb_pool_type_get_from_info(struct genl_info * info,enum devlink_sb_pool_type * p_pool_type)267 devlink_sb_pool_type_get_from_info(struct genl_info *info,
268 enum devlink_sb_pool_type *p_pool_type)
269 {
270 return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
271 }
272
273 static int
devlink_sb_th_type_get_from_attrs(struct nlattr ** attrs,enum devlink_sb_threshold_type * p_th_type)274 devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
275 enum devlink_sb_threshold_type *p_th_type)
276 {
277 u8 val;
278
279 if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
280 return -EINVAL;
281
282 val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
283 if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
284 val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
285 return -EINVAL;
286 *p_th_type = val;
287 return 0;
288 }
289
290 static int
devlink_sb_th_type_get_from_info(struct genl_info * info,enum devlink_sb_threshold_type * p_th_type)291 devlink_sb_th_type_get_from_info(struct genl_info *info,
292 enum devlink_sb_threshold_type *p_th_type)
293 {
294 return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
295 }
296
297 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)298 devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
299 struct nlattr **attrs,
300 enum devlink_sb_pool_type pool_type,
301 u16 *p_tc_index)
302 {
303 u16 val;
304
305 if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
306 return -EINVAL;
307
308 val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
309 if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
310 val >= devlink_sb->ingress_tc_count)
311 return -EINVAL;
312 if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
313 val >= devlink_sb->egress_tc_count)
314 return -EINVAL;
315 *p_tc_index = val;
316 return 0;
317 }
318
319 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)320 devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
321 struct genl_info *info,
322 enum devlink_sb_pool_type pool_type,
323 u16 *p_tc_index)
324 {
325 return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
326 pool_type, p_tc_index);
327 }
328
329 struct devlink_region {
330 struct devlink *devlink;
331 struct list_head list;
332 const char *name;
333 struct list_head snapshot_list;
334 u32 max_snapshots;
335 u32 cur_snapshots;
336 u64 size;
337 };
338
339 struct devlink_snapshot {
340 struct list_head list;
341 struct devlink_region *region;
342 devlink_snapshot_data_dest_t *data_destructor;
343 u64 data_len;
344 u8 *data;
345 u32 id;
346 };
347
348 static struct devlink_region *
devlink_region_get_by_name(struct devlink * devlink,const char * region_name)349 devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
350 {
351 struct devlink_region *region;
352
353 list_for_each_entry(region, &devlink->region_list, list)
354 if (!strcmp(region->name, region_name))
355 return region;
356
357 return NULL;
358 }
359
360 static struct devlink_snapshot *
devlink_region_snapshot_get_by_id(struct devlink_region * region,u32 id)361 devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
362 {
363 struct devlink_snapshot *snapshot;
364
365 list_for_each_entry(snapshot, ®ion->snapshot_list, list)
366 if (snapshot->id == id)
367 return snapshot;
368
369 return NULL;
370 }
371
devlink_region_snapshot_del(struct devlink_snapshot * snapshot)372 static void devlink_region_snapshot_del(struct devlink_snapshot *snapshot)
373 {
374 snapshot->region->cur_snapshots--;
375 list_del(&snapshot->list);
376 (*snapshot->data_destructor)(snapshot->data);
377 kfree(snapshot);
378 }
379
380 #define DEVLINK_NL_FLAG_NEED_DEVLINK BIT(0)
381 #define DEVLINK_NL_FLAG_NEED_PORT BIT(1)
382 #define DEVLINK_NL_FLAG_NEED_SB BIT(2)
383
384 /* The per devlink instance lock is taken by default in the pre-doit
385 * operation, yet several commands do not require this. The global
386 * devlink lock is taken and protects from disruption by user-calls.
387 */
388 #define DEVLINK_NL_FLAG_NO_LOCK BIT(3)
389
devlink_nl_pre_doit(const struct genl_ops * ops,struct sk_buff * skb,struct genl_info * info)390 static int devlink_nl_pre_doit(const struct genl_ops *ops,
391 struct sk_buff *skb, struct genl_info *info)
392 {
393 struct devlink *devlink;
394 int err;
395
396 mutex_lock(&devlink_mutex);
397 devlink = devlink_get_from_info(info);
398 if (IS_ERR(devlink)) {
399 mutex_unlock(&devlink_mutex);
400 return PTR_ERR(devlink);
401 }
402 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
403 mutex_lock(&devlink->lock);
404 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
405 info->user_ptr[0] = devlink;
406 } else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
407 struct devlink_port *devlink_port;
408
409 devlink_port = devlink_port_get_from_info(devlink, info);
410 if (IS_ERR(devlink_port)) {
411 err = PTR_ERR(devlink_port);
412 goto unlock;
413 }
414 info->user_ptr[0] = devlink_port;
415 }
416 if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
417 struct devlink_sb *devlink_sb;
418
419 devlink_sb = devlink_sb_get_from_info(devlink, info);
420 if (IS_ERR(devlink_sb)) {
421 err = PTR_ERR(devlink_sb);
422 goto unlock;
423 }
424 info->user_ptr[1] = devlink_sb;
425 }
426 return 0;
427
428 unlock:
429 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
430 mutex_unlock(&devlink->lock);
431 mutex_unlock(&devlink_mutex);
432 return err;
433 }
434
devlink_nl_post_doit(const struct genl_ops * ops,struct sk_buff * skb,struct genl_info * info)435 static void devlink_nl_post_doit(const struct genl_ops *ops,
436 struct sk_buff *skb, struct genl_info *info)
437 {
438 struct devlink *devlink;
439
440 devlink = devlink_get_from_info(info);
441 if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
442 mutex_unlock(&devlink->lock);
443 mutex_unlock(&devlink_mutex);
444 }
445
446 static struct genl_family devlink_nl_family;
447
448 enum devlink_multicast_groups {
449 DEVLINK_MCGRP_CONFIG,
450 };
451
452 static const struct genl_multicast_group devlink_nl_mcgrps[] = {
453 [DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
454 };
455
devlink_nl_put_handle(struct sk_buff * msg,struct devlink * devlink)456 static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
457 {
458 if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
459 return -EMSGSIZE;
460 if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
461 return -EMSGSIZE;
462 return 0;
463 }
464
devlink_nl_fill(struct sk_buff * msg,struct devlink * devlink,enum devlink_command cmd,u32 portid,u32 seq,int flags)465 static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
466 enum devlink_command cmd, u32 portid,
467 u32 seq, int flags)
468 {
469 void *hdr;
470
471 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
472 if (!hdr)
473 return -EMSGSIZE;
474
475 if (devlink_nl_put_handle(msg, devlink))
476 goto nla_put_failure;
477
478 genlmsg_end(msg, hdr);
479 return 0;
480
481 nla_put_failure:
482 genlmsg_cancel(msg, hdr);
483 return -EMSGSIZE;
484 }
485
devlink_notify(struct devlink * devlink,enum devlink_command cmd)486 static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
487 {
488 struct sk_buff *msg;
489 int err;
490
491 WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
492
493 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
494 if (!msg)
495 return;
496
497 err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
498 if (err) {
499 nlmsg_free(msg);
500 return;
501 }
502
503 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
504 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
505 }
506
devlink_nl_port_attrs_put(struct sk_buff * msg,struct devlink_port * devlink_port)507 static int devlink_nl_port_attrs_put(struct sk_buff *msg,
508 struct devlink_port *devlink_port)
509 {
510 struct devlink_port_attrs *attrs = &devlink_port->attrs;
511
512 if (!attrs->set)
513 return 0;
514 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
515 return -EMSGSIZE;
516 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER, attrs->port_number))
517 return -EMSGSIZE;
518 if (!attrs->split)
519 return 0;
520 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP, attrs->port_number))
521 return -EMSGSIZE;
522 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
523 attrs->split_subport_number))
524 return -EMSGSIZE;
525 return 0;
526 }
527
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)528 static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
529 struct devlink_port *devlink_port,
530 enum devlink_command cmd, u32 portid,
531 u32 seq, int flags)
532 {
533 void *hdr;
534
535 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
536 if (!hdr)
537 return -EMSGSIZE;
538
539 if (devlink_nl_put_handle(msg, devlink))
540 goto nla_put_failure;
541 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
542 goto nla_put_failure;
543 if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
544 goto nla_put_failure;
545 if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
546 nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
547 devlink_port->desired_type))
548 goto nla_put_failure;
549 if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
550 struct net_device *netdev = devlink_port->type_dev;
551
552 if (netdev &&
553 (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
554 netdev->ifindex) ||
555 nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
556 netdev->name)))
557 goto nla_put_failure;
558 }
559 if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
560 struct ib_device *ibdev = devlink_port->type_dev;
561
562 if (ibdev &&
563 nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
564 ibdev->name))
565 goto nla_put_failure;
566 }
567 if (devlink_nl_port_attrs_put(msg, devlink_port))
568 goto nla_put_failure;
569
570 genlmsg_end(msg, hdr);
571 return 0;
572
573 nla_put_failure:
574 genlmsg_cancel(msg, hdr);
575 return -EMSGSIZE;
576 }
577
devlink_port_notify(struct devlink_port * devlink_port,enum devlink_command cmd)578 static void devlink_port_notify(struct devlink_port *devlink_port,
579 enum devlink_command cmd)
580 {
581 struct devlink *devlink = devlink_port->devlink;
582 struct sk_buff *msg;
583 int err;
584
585 if (!devlink_port->registered)
586 return;
587
588 WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
589
590 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
591 if (!msg)
592 return;
593
594 err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0);
595 if (err) {
596 nlmsg_free(msg);
597 return;
598 }
599
600 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
601 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
602 }
603
devlink_nl_cmd_get_doit(struct sk_buff * skb,struct genl_info * info)604 static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
605 {
606 struct devlink *devlink = info->user_ptr[0];
607 struct sk_buff *msg;
608 int err;
609
610 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
611 if (!msg)
612 return -ENOMEM;
613
614 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
615 info->snd_portid, info->snd_seq, 0);
616 if (err) {
617 nlmsg_free(msg);
618 return err;
619 }
620
621 return genlmsg_reply(msg, info);
622 }
623
devlink_nl_cmd_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)624 static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
625 struct netlink_callback *cb)
626 {
627 struct devlink *devlink;
628 int start = cb->args[0];
629 int idx = 0;
630 int err;
631
632 mutex_lock(&devlink_mutex);
633 list_for_each_entry(devlink, &devlink_list, list) {
634 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
635 continue;
636 if (idx < start) {
637 idx++;
638 continue;
639 }
640 err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
641 NETLINK_CB(cb->skb).portid,
642 cb->nlh->nlmsg_seq, NLM_F_MULTI);
643 if (err)
644 goto out;
645 idx++;
646 }
647 out:
648 mutex_unlock(&devlink_mutex);
649
650 cb->args[0] = idx;
651 return msg->len;
652 }
653
devlink_nl_cmd_port_get_doit(struct sk_buff * skb,struct genl_info * info)654 static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
655 struct genl_info *info)
656 {
657 struct devlink_port *devlink_port = info->user_ptr[0];
658 struct devlink *devlink = devlink_port->devlink;
659 struct sk_buff *msg;
660 int err;
661
662 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
663 if (!msg)
664 return -ENOMEM;
665
666 err = devlink_nl_port_fill(msg, devlink, devlink_port,
667 DEVLINK_CMD_PORT_NEW,
668 info->snd_portid, info->snd_seq, 0);
669 if (err) {
670 nlmsg_free(msg);
671 return err;
672 }
673
674 return genlmsg_reply(msg, info);
675 }
676
devlink_nl_cmd_port_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)677 static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
678 struct netlink_callback *cb)
679 {
680 struct devlink *devlink;
681 struct devlink_port *devlink_port;
682 int start = cb->args[0];
683 int idx = 0;
684 int err;
685
686 mutex_lock(&devlink_mutex);
687 list_for_each_entry(devlink, &devlink_list, list) {
688 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
689 continue;
690 mutex_lock(&devlink->lock);
691 list_for_each_entry(devlink_port, &devlink->port_list, list) {
692 if (idx < start) {
693 idx++;
694 continue;
695 }
696 err = devlink_nl_port_fill(msg, devlink, devlink_port,
697 DEVLINK_CMD_NEW,
698 NETLINK_CB(cb->skb).portid,
699 cb->nlh->nlmsg_seq,
700 NLM_F_MULTI);
701 if (err) {
702 mutex_unlock(&devlink->lock);
703 goto out;
704 }
705 idx++;
706 }
707 mutex_unlock(&devlink->lock);
708 }
709 out:
710 mutex_unlock(&devlink_mutex);
711
712 cb->args[0] = idx;
713 return msg->len;
714 }
715
devlink_port_type_set(struct devlink * devlink,struct devlink_port * devlink_port,enum devlink_port_type port_type)716 static int devlink_port_type_set(struct devlink *devlink,
717 struct devlink_port *devlink_port,
718 enum devlink_port_type port_type)
719
720 {
721 int err;
722
723 if (devlink->ops && devlink->ops->port_type_set) {
724 if (port_type == DEVLINK_PORT_TYPE_NOTSET)
725 return -EINVAL;
726 if (port_type == devlink_port->type)
727 return 0;
728 err = devlink->ops->port_type_set(devlink_port, port_type);
729 if (err)
730 return err;
731 devlink_port->desired_type = port_type;
732 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
733 return 0;
734 }
735 return -EOPNOTSUPP;
736 }
737
devlink_nl_cmd_port_set_doit(struct sk_buff * skb,struct genl_info * info)738 static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
739 struct genl_info *info)
740 {
741 struct devlink_port *devlink_port = info->user_ptr[0];
742 struct devlink *devlink = devlink_port->devlink;
743 int err;
744
745 if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
746 enum devlink_port_type port_type;
747
748 port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
749 err = devlink_port_type_set(devlink, devlink_port, port_type);
750 if (err)
751 return err;
752 }
753 return 0;
754 }
755
devlink_port_split(struct devlink * devlink,u32 port_index,u32 count,struct netlink_ext_ack * extack)756 static int devlink_port_split(struct devlink *devlink, u32 port_index,
757 u32 count, struct netlink_ext_ack *extack)
758
759 {
760 if (devlink->ops && devlink->ops->port_split)
761 return devlink->ops->port_split(devlink, port_index, count,
762 extack);
763 return -EOPNOTSUPP;
764 }
765
devlink_nl_cmd_port_split_doit(struct sk_buff * skb,struct genl_info * info)766 static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
767 struct genl_info *info)
768 {
769 struct devlink *devlink = info->user_ptr[0];
770 u32 port_index;
771 u32 count;
772
773 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
774 !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
775 return -EINVAL;
776
777 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
778 count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
779 return devlink_port_split(devlink, port_index, count, info->extack);
780 }
781
devlink_port_unsplit(struct devlink * devlink,u32 port_index,struct netlink_ext_ack * extack)782 static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
783 struct netlink_ext_ack *extack)
784
785 {
786 if (devlink->ops && devlink->ops->port_unsplit)
787 return devlink->ops->port_unsplit(devlink, port_index, extack);
788 return -EOPNOTSUPP;
789 }
790
devlink_nl_cmd_port_unsplit_doit(struct sk_buff * skb,struct genl_info * info)791 static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
792 struct genl_info *info)
793 {
794 struct devlink *devlink = info->user_ptr[0];
795 u32 port_index;
796
797 if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
798 return -EINVAL;
799
800 port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
801 return devlink_port_unsplit(devlink, port_index, info->extack);
802 }
803
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)804 static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
805 struct devlink_sb *devlink_sb,
806 enum devlink_command cmd, u32 portid,
807 u32 seq, int flags)
808 {
809 void *hdr;
810
811 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
812 if (!hdr)
813 return -EMSGSIZE;
814
815 if (devlink_nl_put_handle(msg, devlink))
816 goto nla_put_failure;
817 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
818 goto nla_put_failure;
819 if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
820 goto nla_put_failure;
821 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
822 devlink_sb->ingress_pools_count))
823 goto nla_put_failure;
824 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
825 devlink_sb->egress_pools_count))
826 goto nla_put_failure;
827 if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
828 devlink_sb->ingress_tc_count))
829 goto nla_put_failure;
830 if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
831 devlink_sb->egress_tc_count))
832 goto nla_put_failure;
833
834 genlmsg_end(msg, hdr);
835 return 0;
836
837 nla_put_failure:
838 genlmsg_cancel(msg, hdr);
839 return -EMSGSIZE;
840 }
841
devlink_nl_cmd_sb_get_doit(struct sk_buff * skb,struct genl_info * info)842 static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
843 struct genl_info *info)
844 {
845 struct devlink *devlink = info->user_ptr[0];
846 struct devlink_sb *devlink_sb = info->user_ptr[1];
847 struct sk_buff *msg;
848 int err;
849
850 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
851 if (!msg)
852 return -ENOMEM;
853
854 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
855 DEVLINK_CMD_SB_NEW,
856 info->snd_portid, info->snd_seq, 0);
857 if (err) {
858 nlmsg_free(msg);
859 return err;
860 }
861
862 return genlmsg_reply(msg, info);
863 }
864
devlink_nl_cmd_sb_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)865 static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
866 struct netlink_callback *cb)
867 {
868 struct devlink *devlink;
869 struct devlink_sb *devlink_sb;
870 int start = cb->args[0];
871 int idx = 0;
872 int err;
873
874 mutex_lock(&devlink_mutex);
875 list_for_each_entry(devlink, &devlink_list, list) {
876 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
877 continue;
878 mutex_lock(&devlink->lock);
879 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
880 if (idx < start) {
881 idx++;
882 continue;
883 }
884 err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
885 DEVLINK_CMD_SB_NEW,
886 NETLINK_CB(cb->skb).portid,
887 cb->nlh->nlmsg_seq,
888 NLM_F_MULTI);
889 if (err) {
890 mutex_unlock(&devlink->lock);
891 goto out;
892 }
893 idx++;
894 }
895 mutex_unlock(&devlink->lock);
896 }
897 out:
898 mutex_unlock(&devlink_mutex);
899
900 cb->args[0] = idx;
901 return msg->len;
902 }
903
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)904 static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
905 struct devlink_sb *devlink_sb,
906 u16 pool_index, enum devlink_command cmd,
907 u32 portid, u32 seq, int flags)
908 {
909 struct devlink_sb_pool_info pool_info;
910 void *hdr;
911 int err;
912
913 err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
914 pool_index, &pool_info);
915 if (err)
916 return err;
917
918 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
919 if (!hdr)
920 return -EMSGSIZE;
921
922 if (devlink_nl_put_handle(msg, devlink))
923 goto nla_put_failure;
924 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
925 goto nla_put_failure;
926 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
927 goto nla_put_failure;
928 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
929 goto nla_put_failure;
930 if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
931 goto nla_put_failure;
932 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
933 pool_info.threshold_type))
934 goto nla_put_failure;
935
936 genlmsg_end(msg, hdr);
937 return 0;
938
939 nla_put_failure:
940 genlmsg_cancel(msg, hdr);
941 return -EMSGSIZE;
942 }
943
devlink_nl_cmd_sb_pool_get_doit(struct sk_buff * skb,struct genl_info * info)944 static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
945 struct genl_info *info)
946 {
947 struct devlink *devlink = info->user_ptr[0];
948 struct devlink_sb *devlink_sb = info->user_ptr[1];
949 struct sk_buff *msg;
950 u16 pool_index;
951 int err;
952
953 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
954 &pool_index);
955 if (err)
956 return err;
957
958 if (!devlink->ops || !devlink->ops->sb_pool_get)
959 return -EOPNOTSUPP;
960
961 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
962 if (!msg)
963 return -ENOMEM;
964
965 err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
966 DEVLINK_CMD_SB_POOL_NEW,
967 info->snd_portid, info->snd_seq, 0);
968 if (err) {
969 nlmsg_free(msg);
970 return err;
971 }
972
973 return genlmsg_reply(msg, info);
974 }
975
__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)976 static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
977 struct devlink *devlink,
978 struct devlink_sb *devlink_sb,
979 u32 portid, u32 seq)
980 {
981 u16 pool_count = devlink_sb_pool_count(devlink_sb);
982 u16 pool_index;
983 int err;
984
985 for (pool_index = 0; pool_index < pool_count; pool_index++) {
986 if (*p_idx < start) {
987 (*p_idx)++;
988 continue;
989 }
990 err = devlink_nl_sb_pool_fill(msg, devlink,
991 devlink_sb,
992 pool_index,
993 DEVLINK_CMD_SB_POOL_NEW,
994 portid, seq, NLM_F_MULTI);
995 if (err)
996 return err;
997 (*p_idx)++;
998 }
999 return 0;
1000 }
1001
devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)1002 static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
1003 struct netlink_callback *cb)
1004 {
1005 struct devlink *devlink;
1006 struct devlink_sb *devlink_sb;
1007 int start = cb->args[0];
1008 int idx = 0;
1009 int err;
1010
1011 mutex_lock(&devlink_mutex);
1012 list_for_each_entry(devlink, &devlink_list, list) {
1013 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1014 !devlink->ops || !devlink->ops->sb_pool_get)
1015 continue;
1016 mutex_lock(&devlink->lock);
1017 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1018 err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
1019 devlink_sb,
1020 NETLINK_CB(cb->skb).portid,
1021 cb->nlh->nlmsg_seq);
1022 if (err && err != -EOPNOTSUPP) {
1023 mutex_unlock(&devlink->lock);
1024 goto out;
1025 }
1026 }
1027 mutex_unlock(&devlink->lock);
1028 }
1029 out:
1030 mutex_unlock(&devlink_mutex);
1031
1032 cb->args[0] = idx;
1033 return msg->len;
1034 }
1035
devlink_sb_pool_set(struct devlink * devlink,unsigned int sb_index,u16 pool_index,u32 size,enum devlink_sb_threshold_type threshold_type)1036 static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
1037 u16 pool_index, u32 size,
1038 enum devlink_sb_threshold_type threshold_type)
1039
1040 {
1041 const struct devlink_ops *ops = devlink->ops;
1042
1043 if (ops && ops->sb_pool_set)
1044 return ops->sb_pool_set(devlink, sb_index, pool_index,
1045 size, threshold_type);
1046 return -EOPNOTSUPP;
1047 }
1048
devlink_nl_cmd_sb_pool_set_doit(struct sk_buff * skb,struct genl_info * info)1049 static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
1050 struct genl_info *info)
1051 {
1052 struct devlink *devlink = info->user_ptr[0];
1053 struct devlink_sb *devlink_sb = info->user_ptr[1];
1054 enum devlink_sb_threshold_type threshold_type;
1055 u16 pool_index;
1056 u32 size;
1057 int err;
1058
1059 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1060 &pool_index);
1061 if (err)
1062 return err;
1063
1064 err = devlink_sb_th_type_get_from_info(info, &threshold_type);
1065 if (err)
1066 return err;
1067
1068 if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
1069 return -EINVAL;
1070
1071 size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
1072 return devlink_sb_pool_set(devlink, devlink_sb->index,
1073 pool_index, size, threshold_type);
1074 }
1075
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)1076 static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
1077 struct devlink *devlink,
1078 struct devlink_port *devlink_port,
1079 struct devlink_sb *devlink_sb,
1080 u16 pool_index,
1081 enum devlink_command cmd,
1082 u32 portid, u32 seq, int flags)
1083 {
1084 const struct devlink_ops *ops = devlink->ops;
1085 u32 threshold;
1086 void *hdr;
1087 int err;
1088
1089 err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
1090 pool_index, &threshold);
1091 if (err)
1092 return err;
1093
1094 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1095 if (!hdr)
1096 return -EMSGSIZE;
1097
1098 if (devlink_nl_put_handle(msg, devlink))
1099 goto nla_put_failure;
1100 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1101 goto nla_put_failure;
1102 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1103 goto nla_put_failure;
1104 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1105 goto nla_put_failure;
1106 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1107 goto nla_put_failure;
1108
1109 if (ops->sb_occ_port_pool_get) {
1110 u32 cur;
1111 u32 max;
1112
1113 err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
1114 pool_index, &cur, &max);
1115 if (err && err != -EOPNOTSUPP)
1116 return err;
1117 if (!err) {
1118 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1119 goto nla_put_failure;
1120 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1121 goto nla_put_failure;
1122 }
1123 }
1124
1125 genlmsg_end(msg, hdr);
1126 return 0;
1127
1128 nla_put_failure:
1129 genlmsg_cancel(msg, hdr);
1130 return -EMSGSIZE;
1131 }
1132
devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff * skb,struct genl_info * info)1133 static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
1134 struct genl_info *info)
1135 {
1136 struct devlink_port *devlink_port = info->user_ptr[0];
1137 struct devlink *devlink = devlink_port->devlink;
1138 struct devlink_sb *devlink_sb = info->user_ptr[1];
1139 struct sk_buff *msg;
1140 u16 pool_index;
1141 int err;
1142
1143 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1144 &pool_index);
1145 if (err)
1146 return err;
1147
1148 if (!devlink->ops || !devlink->ops->sb_port_pool_get)
1149 return -EOPNOTSUPP;
1150
1151 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1152 if (!msg)
1153 return -ENOMEM;
1154
1155 err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
1156 devlink_sb, pool_index,
1157 DEVLINK_CMD_SB_PORT_POOL_NEW,
1158 info->snd_portid, info->snd_seq, 0);
1159 if (err) {
1160 nlmsg_free(msg);
1161 return err;
1162 }
1163
1164 return genlmsg_reply(msg, info);
1165 }
1166
__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)1167 static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
1168 struct devlink *devlink,
1169 struct devlink_sb *devlink_sb,
1170 u32 portid, u32 seq)
1171 {
1172 struct devlink_port *devlink_port;
1173 u16 pool_count = devlink_sb_pool_count(devlink_sb);
1174 u16 pool_index;
1175 int err;
1176
1177 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1178 for (pool_index = 0; pool_index < pool_count; pool_index++) {
1179 if (*p_idx < start) {
1180 (*p_idx)++;
1181 continue;
1182 }
1183 err = devlink_nl_sb_port_pool_fill(msg, devlink,
1184 devlink_port,
1185 devlink_sb,
1186 pool_index,
1187 DEVLINK_CMD_SB_PORT_POOL_NEW,
1188 portid, seq,
1189 NLM_F_MULTI);
1190 if (err)
1191 return err;
1192 (*p_idx)++;
1193 }
1194 }
1195 return 0;
1196 }
1197
devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)1198 static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
1199 struct netlink_callback *cb)
1200 {
1201 struct devlink *devlink;
1202 struct devlink_sb *devlink_sb;
1203 int start = cb->args[0];
1204 int idx = 0;
1205 int err;
1206
1207 mutex_lock(&devlink_mutex);
1208 list_for_each_entry(devlink, &devlink_list, list) {
1209 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1210 !devlink->ops || !devlink->ops->sb_port_pool_get)
1211 continue;
1212 mutex_lock(&devlink->lock);
1213 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1214 err = __sb_port_pool_get_dumpit(msg, start, &idx,
1215 devlink, devlink_sb,
1216 NETLINK_CB(cb->skb).portid,
1217 cb->nlh->nlmsg_seq);
1218 if (err && err != -EOPNOTSUPP) {
1219 mutex_unlock(&devlink->lock);
1220 goto out;
1221 }
1222 }
1223 mutex_unlock(&devlink->lock);
1224 }
1225 out:
1226 mutex_unlock(&devlink_mutex);
1227
1228 cb->args[0] = idx;
1229 return msg->len;
1230 }
1231
devlink_sb_port_pool_set(struct devlink_port * devlink_port,unsigned int sb_index,u16 pool_index,u32 threshold)1232 static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1233 unsigned int sb_index, u16 pool_index,
1234 u32 threshold)
1235
1236 {
1237 const struct devlink_ops *ops = devlink_port->devlink->ops;
1238
1239 if (ops && ops->sb_port_pool_set)
1240 return ops->sb_port_pool_set(devlink_port, sb_index,
1241 pool_index, threshold);
1242 return -EOPNOTSUPP;
1243 }
1244
devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff * skb,struct genl_info * info)1245 static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
1246 struct genl_info *info)
1247 {
1248 struct devlink_port *devlink_port = info->user_ptr[0];
1249 struct devlink_sb *devlink_sb = info->user_ptr[1];
1250 u16 pool_index;
1251 u32 threshold;
1252 int err;
1253
1254 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1255 &pool_index);
1256 if (err)
1257 return err;
1258
1259 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1260 return -EINVAL;
1261
1262 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1263 return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
1264 pool_index, threshold);
1265 }
1266
1267 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)1268 devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
1269 struct devlink_port *devlink_port,
1270 struct devlink_sb *devlink_sb, u16 tc_index,
1271 enum devlink_sb_pool_type pool_type,
1272 enum devlink_command cmd,
1273 u32 portid, u32 seq, int flags)
1274 {
1275 const struct devlink_ops *ops = devlink->ops;
1276 u16 pool_index;
1277 u32 threshold;
1278 void *hdr;
1279 int err;
1280
1281 err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
1282 tc_index, pool_type,
1283 &pool_index, &threshold);
1284 if (err)
1285 return err;
1286
1287 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1288 if (!hdr)
1289 return -EMSGSIZE;
1290
1291 if (devlink_nl_put_handle(msg, devlink))
1292 goto nla_put_failure;
1293 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
1294 goto nla_put_failure;
1295 if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
1296 goto nla_put_failure;
1297 if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
1298 goto nla_put_failure;
1299 if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
1300 goto nla_put_failure;
1301 if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
1302 goto nla_put_failure;
1303 if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
1304 goto nla_put_failure;
1305
1306 if (ops->sb_occ_tc_port_bind_get) {
1307 u32 cur;
1308 u32 max;
1309
1310 err = ops->sb_occ_tc_port_bind_get(devlink_port,
1311 devlink_sb->index,
1312 tc_index, pool_type,
1313 &cur, &max);
1314 if (err && err != -EOPNOTSUPP)
1315 return err;
1316 if (!err) {
1317 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
1318 goto nla_put_failure;
1319 if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
1320 goto nla_put_failure;
1321 }
1322 }
1323
1324 genlmsg_end(msg, hdr);
1325 return 0;
1326
1327 nla_put_failure:
1328 genlmsg_cancel(msg, hdr);
1329 return -EMSGSIZE;
1330 }
1331
devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff * skb,struct genl_info * info)1332 static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
1333 struct genl_info *info)
1334 {
1335 struct devlink_port *devlink_port = info->user_ptr[0];
1336 struct devlink *devlink = devlink_port->devlink;
1337 struct devlink_sb *devlink_sb = info->user_ptr[1];
1338 struct sk_buff *msg;
1339 enum devlink_sb_pool_type pool_type;
1340 u16 tc_index;
1341 int err;
1342
1343 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1344 if (err)
1345 return err;
1346
1347 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1348 pool_type, &tc_index);
1349 if (err)
1350 return err;
1351
1352 if (!devlink->ops || !devlink->ops->sb_tc_pool_bind_get)
1353 return -EOPNOTSUPP;
1354
1355 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1356 if (!msg)
1357 return -ENOMEM;
1358
1359 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
1360 devlink_sb, tc_index, pool_type,
1361 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1362 info->snd_portid,
1363 info->snd_seq, 0);
1364 if (err) {
1365 nlmsg_free(msg);
1366 return err;
1367 }
1368
1369 return genlmsg_reply(msg, info);
1370 }
1371
__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)1372 static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1373 int start, int *p_idx,
1374 struct devlink *devlink,
1375 struct devlink_sb *devlink_sb,
1376 u32 portid, u32 seq)
1377 {
1378 struct devlink_port *devlink_port;
1379 u16 tc_index;
1380 int err;
1381
1382 list_for_each_entry(devlink_port, &devlink->port_list, list) {
1383 for (tc_index = 0;
1384 tc_index < devlink_sb->ingress_tc_count; tc_index++) {
1385 if (*p_idx < start) {
1386 (*p_idx)++;
1387 continue;
1388 }
1389 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1390 devlink_port,
1391 devlink_sb,
1392 tc_index,
1393 DEVLINK_SB_POOL_TYPE_INGRESS,
1394 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1395 portid, seq,
1396 NLM_F_MULTI);
1397 if (err)
1398 return err;
1399 (*p_idx)++;
1400 }
1401 for (tc_index = 0;
1402 tc_index < devlink_sb->egress_tc_count; tc_index++) {
1403 if (*p_idx < start) {
1404 (*p_idx)++;
1405 continue;
1406 }
1407 err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
1408 devlink_port,
1409 devlink_sb,
1410 tc_index,
1411 DEVLINK_SB_POOL_TYPE_EGRESS,
1412 DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
1413 portid, seq,
1414 NLM_F_MULTI);
1415 if (err)
1416 return err;
1417 (*p_idx)++;
1418 }
1419 }
1420 return 0;
1421 }
1422
1423 static int
devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)1424 devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
1425 struct netlink_callback *cb)
1426 {
1427 struct devlink *devlink;
1428 struct devlink_sb *devlink_sb;
1429 int start = cb->args[0];
1430 int idx = 0;
1431 int err;
1432
1433 mutex_lock(&devlink_mutex);
1434 list_for_each_entry(devlink, &devlink_list, list) {
1435 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
1436 !devlink->ops || !devlink->ops->sb_tc_pool_bind_get)
1437 continue;
1438
1439 mutex_lock(&devlink->lock);
1440 list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
1441 err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
1442 devlink,
1443 devlink_sb,
1444 NETLINK_CB(cb->skb).portid,
1445 cb->nlh->nlmsg_seq);
1446 if (err && err != -EOPNOTSUPP) {
1447 mutex_unlock(&devlink->lock);
1448 goto out;
1449 }
1450 }
1451 mutex_unlock(&devlink->lock);
1452 }
1453 out:
1454 mutex_unlock(&devlink_mutex);
1455
1456 cb->args[0] = idx;
1457 return msg->len;
1458 }
1459
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)1460 static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1461 unsigned int sb_index, u16 tc_index,
1462 enum devlink_sb_pool_type pool_type,
1463 u16 pool_index, u32 threshold)
1464
1465 {
1466 const struct devlink_ops *ops = devlink_port->devlink->ops;
1467
1468 if (ops && ops->sb_tc_pool_bind_set)
1469 return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
1470 tc_index, pool_type,
1471 pool_index, threshold);
1472 return -EOPNOTSUPP;
1473 }
1474
devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff * skb,struct genl_info * info)1475 static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
1476 struct genl_info *info)
1477 {
1478 struct devlink_port *devlink_port = info->user_ptr[0];
1479 struct devlink_sb *devlink_sb = info->user_ptr[1];
1480 enum devlink_sb_pool_type pool_type;
1481 u16 tc_index;
1482 u16 pool_index;
1483 u32 threshold;
1484 int err;
1485
1486 err = devlink_sb_pool_type_get_from_info(info, &pool_type);
1487 if (err)
1488 return err;
1489
1490 err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
1491 pool_type, &tc_index);
1492 if (err)
1493 return err;
1494
1495 err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
1496 &pool_index);
1497 if (err)
1498 return err;
1499
1500 if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
1501 return -EINVAL;
1502
1503 threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
1504 return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
1505 tc_index, pool_type,
1506 pool_index, threshold);
1507 }
1508
devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff * skb,struct genl_info * info)1509 static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
1510 struct genl_info *info)
1511 {
1512 struct devlink *devlink = info->user_ptr[0];
1513 struct devlink_sb *devlink_sb = info->user_ptr[1];
1514 const struct devlink_ops *ops = devlink->ops;
1515
1516 if (ops && ops->sb_occ_snapshot)
1517 return ops->sb_occ_snapshot(devlink, devlink_sb->index);
1518 return -EOPNOTSUPP;
1519 }
1520
devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff * skb,struct genl_info * info)1521 static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
1522 struct genl_info *info)
1523 {
1524 struct devlink *devlink = info->user_ptr[0];
1525 struct devlink_sb *devlink_sb = info->user_ptr[1];
1526 const struct devlink_ops *ops = devlink->ops;
1527
1528 if (ops && ops->sb_occ_max_clear)
1529 return ops->sb_occ_max_clear(devlink, devlink_sb->index);
1530 return -EOPNOTSUPP;
1531 }
1532
devlink_nl_eswitch_fill(struct sk_buff * msg,struct devlink * devlink,enum devlink_command cmd,u32 portid,u32 seq,int flags)1533 static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
1534 enum devlink_command cmd, u32 portid,
1535 u32 seq, int flags)
1536 {
1537 const struct devlink_ops *ops = devlink->ops;
1538 u8 inline_mode, encap_mode;
1539 void *hdr;
1540 int err = 0;
1541 u16 mode;
1542
1543 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
1544 if (!hdr)
1545 return -EMSGSIZE;
1546
1547 err = devlink_nl_put_handle(msg, devlink);
1548 if (err)
1549 goto nla_put_failure;
1550
1551 if (ops->eswitch_mode_get) {
1552 err = ops->eswitch_mode_get(devlink, &mode);
1553 if (err)
1554 goto nla_put_failure;
1555 err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
1556 if (err)
1557 goto nla_put_failure;
1558 }
1559
1560 if (ops->eswitch_inline_mode_get) {
1561 err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
1562 if (err)
1563 goto nla_put_failure;
1564 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
1565 inline_mode);
1566 if (err)
1567 goto nla_put_failure;
1568 }
1569
1570 if (ops->eswitch_encap_mode_get) {
1571 err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
1572 if (err)
1573 goto nla_put_failure;
1574 err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode);
1575 if (err)
1576 goto nla_put_failure;
1577 }
1578
1579 genlmsg_end(msg, hdr);
1580 return 0;
1581
1582 nla_put_failure:
1583 genlmsg_cancel(msg, hdr);
1584 return err;
1585 }
1586
devlink_nl_cmd_eswitch_get_doit(struct sk_buff * skb,struct genl_info * info)1587 static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb,
1588 struct genl_info *info)
1589 {
1590 struct devlink *devlink = info->user_ptr[0];
1591 const struct devlink_ops *ops = devlink->ops;
1592 struct sk_buff *msg;
1593 int err;
1594
1595 if (!ops)
1596 return -EOPNOTSUPP;
1597
1598 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1599 if (!msg)
1600 return -ENOMEM;
1601
1602 err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET,
1603 info->snd_portid, info->snd_seq, 0);
1604
1605 if (err) {
1606 nlmsg_free(msg);
1607 return err;
1608 }
1609
1610 return genlmsg_reply(msg, info);
1611 }
1612
devlink_nl_cmd_eswitch_set_doit(struct sk_buff * skb,struct genl_info * info)1613 static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
1614 struct genl_info *info)
1615 {
1616 struct devlink *devlink = info->user_ptr[0];
1617 const struct devlink_ops *ops = devlink->ops;
1618 u8 inline_mode, encap_mode;
1619 int err = 0;
1620 u16 mode;
1621
1622 if (!ops)
1623 return -EOPNOTSUPP;
1624
1625 if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
1626 if (!ops->eswitch_mode_set)
1627 return -EOPNOTSUPP;
1628 mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
1629 err = ops->eswitch_mode_set(devlink, mode);
1630 if (err)
1631 return err;
1632 }
1633
1634 if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
1635 if (!ops->eswitch_inline_mode_set)
1636 return -EOPNOTSUPP;
1637 inline_mode = nla_get_u8(
1638 info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
1639 err = ops->eswitch_inline_mode_set(devlink, inline_mode);
1640 if (err)
1641 return err;
1642 }
1643
1644 if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) {
1645 if (!ops->eswitch_encap_mode_set)
1646 return -EOPNOTSUPP;
1647 encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]);
1648 err = ops->eswitch_encap_mode_set(devlink, encap_mode);
1649 if (err)
1650 return err;
1651 }
1652
1653 return 0;
1654 }
1655
devlink_dpipe_match_put(struct sk_buff * skb,struct devlink_dpipe_match * match)1656 int devlink_dpipe_match_put(struct sk_buff *skb,
1657 struct devlink_dpipe_match *match)
1658 {
1659 struct devlink_dpipe_header *header = match->header;
1660 struct devlink_dpipe_field *field = &header->fields[match->field_id];
1661 struct nlattr *match_attr;
1662
1663 match_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_MATCH);
1664 if (!match_attr)
1665 return -EMSGSIZE;
1666
1667 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
1668 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
1669 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1670 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1671 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1672 goto nla_put_failure;
1673
1674 nla_nest_end(skb, match_attr);
1675 return 0;
1676
1677 nla_put_failure:
1678 nla_nest_cancel(skb, match_attr);
1679 return -EMSGSIZE;
1680 }
1681 EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
1682
devlink_dpipe_matches_put(struct devlink_dpipe_table * table,struct sk_buff * skb)1683 static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
1684 struct sk_buff *skb)
1685 {
1686 struct nlattr *matches_attr;
1687
1688 matches_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
1689 if (!matches_attr)
1690 return -EMSGSIZE;
1691
1692 if (table->table_ops->matches_dump(table->priv, skb))
1693 goto nla_put_failure;
1694
1695 nla_nest_end(skb, matches_attr);
1696 return 0;
1697
1698 nla_put_failure:
1699 nla_nest_cancel(skb, matches_attr);
1700 return -EMSGSIZE;
1701 }
1702
devlink_dpipe_action_put(struct sk_buff * skb,struct devlink_dpipe_action * action)1703 int devlink_dpipe_action_put(struct sk_buff *skb,
1704 struct devlink_dpipe_action *action)
1705 {
1706 struct devlink_dpipe_header *header = action->header;
1707 struct devlink_dpipe_field *field = &header->fields[action->field_id];
1708 struct nlattr *action_attr;
1709
1710 action_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_ACTION);
1711 if (!action_attr)
1712 return -EMSGSIZE;
1713
1714 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
1715 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
1716 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
1717 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
1718 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
1719 goto nla_put_failure;
1720
1721 nla_nest_end(skb, action_attr);
1722 return 0;
1723
1724 nla_put_failure:
1725 nla_nest_cancel(skb, action_attr);
1726 return -EMSGSIZE;
1727 }
1728 EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
1729
devlink_dpipe_actions_put(struct devlink_dpipe_table * table,struct sk_buff * skb)1730 static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
1731 struct sk_buff *skb)
1732 {
1733 struct nlattr *actions_attr;
1734
1735 actions_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
1736 if (!actions_attr)
1737 return -EMSGSIZE;
1738
1739 if (table->table_ops->actions_dump(table->priv, skb))
1740 goto nla_put_failure;
1741
1742 nla_nest_end(skb, actions_attr);
1743 return 0;
1744
1745 nla_put_failure:
1746 nla_nest_cancel(skb, actions_attr);
1747 return -EMSGSIZE;
1748 }
1749
devlink_dpipe_table_put(struct sk_buff * skb,struct devlink_dpipe_table * table)1750 static int devlink_dpipe_table_put(struct sk_buff *skb,
1751 struct devlink_dpipe_table *table)
1752 {
1753 struct nlattr *table_attr;
1754 u64 table_size;
1755
1756 table_size = table->table_ops->size_get(table->priv);
1757 table_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLE);
1758 if (!table_attr)
1759 return -EMSGSIZE;
1760
1761 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
1762 nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size,
1763 DEVLINK_ATTR_PAD))
1764 goto nla_put_failure;
1765 if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
1766 table->counters_enabled))
1767 goto nla_put_failure;
1768
1769 if (table->resource_valid) {
1770 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
1771 table->resource_id, DEVLINK_ATTR_PAD) ||
1772 nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
1773 table->resource_units, DEVLINK_ATTR_PAD))
1774 goto nla_put_failure;
1775 }
1776 if (devlink_dpipe_matches_put(table, skb))
1777 goto nla_put_failure;
1778
1779 if (devlink_dpipe_actions_put(table, skb))
1780 goto nla_put_failure;
1781
1782 nla_nest_end(skb, table_attr);
1783 return 0;
1784
1785 nla_put_failure:
1786 nla_nest_cancel(skb, table_attr);
1787 return -EMSGSIZE;
1788 }
1789
devlink_dpipe_send_and_alloc_skb(struct sk_buff ** pskb,struct genl_info * info)1790 static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
1791 struct genl_info *info)
1792 {
1793 int err;
1794
1795 if (*pskb) {
1796 err = genlmsg_reply(*pskb, info);
1797 if (err)
1798 return err;
1799 }
1800 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1801 if (!*pskb)
1802 return -ENOMEM;
1803 return 0;
1804 }
1805
devlink_dpipe_tables_fill(struct genl_info * info,enum devlink_command cmd,int flags,struct list_head * dpipe_tables,const char * table_name)1806 static int devlink_dpipe_tables_fill(struct genl_info *info,
1807 enum devlink_command cmd, int flags,
1808 struct list_head *dpipe_tables,
1809 const char *table_name)
1810 {
1811 struct devlink *devlink = info->user_ptr[0];
1812 struct devlink_dpipe_table *table;
1813 struct nlattr *tables_attr;
1814 struct sk_buff *skb = NULL;
1815 struct nlmsghdr *nlh;
1816 bool incomplete;
1817 void *hdr;
1818 int i;
1819 int err;
1820
1821 table = list_first_entry(dpipe_tables,
1822 struct devlink_dpipe_table, list);
1823 start_again:
1824 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1825 if (err)
1826 return err;
1827
1828 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
1829 &devlink_nl_family, NLM_F_MULTI, cmd);
1830 if (!hdr) {
1831 nlmsg_free(skb);
1832 return -EMSGSIZE;
1833 }
1834
1835 if (devlink_nl_put_handle(skb, devlink))
1836 goto nla_put_failure;
1837 tables_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_TABLES);
1838 if (!tables_attr)
1839 goto nla_put_failure;
1840
1841 i = 0;
1842 incomplete = false;
1843 list_for_each_entry_from(table, dpipe_tables, list) {
1844 if (!table_name) {
1845 err = devlink_dpipe_table_put(skb, table);
1846 if (err) {
1847 if (!i)
1848 goto err_table_put;
1849 incomplete = true;
1850 break;
1851 }
1852 } else {
1853 if (!strcmp(table->name, table_name)) {
1854 err = devlink_dpipe_table_put(skb, table);
1855 if (err)
1856 break;
1857 }
1858 }
1859 i++;
1860 }
1861
1862 nla_nest_end(skb, tables_attr);
1863 genlmsg_end(skb, hdr);
1864 if (incomplete)
1865 goto start_again;
1866
1867 send_done:
1868 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
1869 NLMSG_DONE, 0, flags | NLM_F_MULTI);
1870 if (!nlh) {
1871 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
1872 if (err)
1873 return err;
1874 goto send_done;
1875 }
1876
1877 return genlmsg_reply(skb, info);
1878
1879 nla_put_failure:
1880 err = -EMSGSIZE;
1881 err_table_put:
1882 nlmsg_free(skb);
1883 return err;
1884 }
1885
devlink_nl_cmd_dpipe_table_get(struct sk_buff * skb,struct genl_info * info)1886 static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
1887 struct genl_info *info)
1888 {
1889 struct devlink *devlink = info->user_ptr[0];
1890 const char *table_name = NULL;
1891
1892 if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
1893 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
1894
1895 return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
1896 &devlink->dpipe_table_list,
1897 table_name);
1898 }
1899
devlink_dpipe_value_put(struct sk_buff * skb,struct devlink_dpipe_value * value)1900 static int devlink_dpipe_value_put(struct sk_buff *skb,
1901 struct devlink_dpipe_value *value)
1902 {
1903 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
1904 value->value_size, value->value))
1905 return -EMSGSIZE;
1906 if (value->mask)
1907 if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
1908 value->value_size, value->mask))
1909 return -EMSGSIZE;
1910 if (value->mapping_valid)
1911 if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
1912 value->mapping_value))
1913 return -EMSGSIZE;
1914 return 0;
1915 }
1916
devlink_dpipe_action_value_put(struct sk_buff * skb,struct devlink_dpipe_value * value)1917 static int devlink_dpipe_action_value_put(struct sk_buff *skb,
1918 struct devlink_dpipe_value *value)
1919 {
1920 if (!value->action)
1921 return -EINVAL;
1922 if (devlink_dpipe_action_put(skb, value->action))
1923 return -EMSGSIZE;
1924 if (devlink_dpipe_value_put(skb, value))
1925 return -EMSGSIZE;
1926 return 0;
1927 }
1928
devlink_dpipe_action_values_put(struct sk_buff * skb,struct devlink_dpipe_value * values,unsigned int values_count)1929 static int devlink_dpipe_action_values_put(struct sk_buff *skb,
1930 struct devlink_dpipe_value *values,
1931 unsigned int values_count)
1932 {
1933 struct nlattr *action_attr;
1934 int i;
1935 int err;
1936
1937 for (i = 0; i < values_count; i++) {
1938 action_attr = nla_nest_start(skb,
1939 DEVLINK_ATTR_DPIPE_ACTION_VALUE);
1940 if (!action_attr)
1941 return -EMSGSIZE;
1942 err = devlink_dpipe_action_value_put(skb, &values[i]);
1943 if (err)
1944 goto err_action_value_put;
1945 nla_nest_end(skb, action_attr);
1946 }
1947 return 0;
1948
1949 err_action_value_put:
1950 nla_nest_cancel(skb, action_attr);
1951 return err;
1952 }
1953
devlink_dpipe_match_value_put(struct sk_buff * skb,struct devlink_dpipe_value * value)1954 static int devlink_dpipe_match_value_put(struct sk_buff *skb,
1955 struct devlink_dpipe_value *value)
1956 {
1957 if (!value->match)
1958 return -EINVAL;
1959 if (devlink_dpipe_match_put(skb, value->match))
1960 return -EMSGSIZE;
1961 if (devlink_dpipe_value_put(skb, value))
1962 return -EMSGSIZE;
1963 return 0;
1964 }
1965
devlink_dpipe_match_values_put(struct sk_buff * skb,struct devlink_dpipe_value * values,unsigned int values_count)1966 static int devlink_dpipe_match_values_put(struct sk_buff *skb,
1967 struct devlink_dpipe_value *values,
1968 unsigned int values_count)
1969 {
1970 struct nlattr *match_attr;
1971 int i;
1972 int err;
1973
1974 for (i = 0; i < values_count; i++) {
1975 match_attr = nla_nest_start(skb,
1976 DEVLINK_ATTR_DPIPE_MATCH_VALUE);
1977 if (!match_attr)
1978 return -EMSGSIZE;
1979 err = devlink_dpipe_match_value_put(skb, &values[i]);
1980 if (err)
1981 goto err_match_value_put;
1982 nla_nest_end(skb, match_attr);
1983 }
1984 return 0;
1985
1986 err_match_value_put:
1987 nla_nest_cancel(skb, match_attr);
1988 return err;
1989 }
1990
devlink_dpipe_entry_put(struct sk_buff * skb,struct devlink_dpipe_entry * entry)1991 static int devlink_dpipe_entry_put(struct sk_buff *skb,
1992 struct devlink_dpipe_entry *entry)
1993 {
1994 struct nlattr *entry_attr, *matches_attr, *actions_attr;
1995 int err;
1996
1997 entry_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_ENTRY);
1998 if (!entry_attr)
1999 return -EMSGSIZE;
2000
2001 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
2002 DEVLINK_ATTR_PAD))
2003 goto nla_put_failure;
2004 if (entry->counter_valid)
2005 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
2006 entry->counter, DEVLINK_ATTR_PAD))
2007 goto nla_put_failure;
2008
2009 matches_attr = nla_nest_start(skb,
2010 DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
2011 if (!matches_attr)
2012 goto nla_put_failure;
2013
2014 err = devlink_dpipe_match_values_put(skb, entry->match_values,
2015 entry->match_values_count);
2016 if (err) {
2017 nla_nest_cancel(skb, matches_attr);
2018 goto err_match_values_put;
2019 }
2020 nla_nest_end(skb, matches_attr);
2021
2022 actions_attr = nla_nest_start(skb,
2023 DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
2024 if (!actions_attr)
2025 goto nla_put_failure;
2026
2027 err = devlink_dpipe_action_values_put(skb, entry->action_values,
2028 entry->action_values_count);
2029 if (err) {
2030 nla_nest_cancel(skb, actions_attr);
2031 goto err_action_values_put;
2032 }
2033 nla_nest_end(skb, actions_attr);
2034
2035 nla_nest_end(skb, entry_attr);
2036 return 0;
2037
2038 nla_put_failure:
2039 err = -EMSGSIZE;
2040 err_match_values_put:
2041 err_action_values_put:
2042 nla_nest_cancel(skb, entry_attr);
2043 return err;
2044 }
2045
2046 static struct devlink_dpipe_table *
devlink_dpipe_table_find(struct list_head * dpipe_tables,const char * table_name)2047 devlink_dpipe_table_find(struct list_head *dpipe_tables,
2048 const char *table_name)
2049 {
2050 struct devlink_dpipe_table *table;
2051
2052 list_for_each_entry_rcu(table, dpipe_tables, list) {
2053 if (!strcmp(table->name, table_name))
2054 return table;
2055 }
2056 return NULL;
2057 }
2058
devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx * dump_ctx)2059 int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
2060 {
2061 struct devlink *devlink;
2062 int err;
2063
2064 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
2065 dump_ctx->info);
2066 if (err)
2067 return err;
2068
2069 dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
2070 dump_ctx->info->snd_portid,
2071 dump_ctx->info->snd_seq,
2072 &devlink_nl_family, NLM_F_MULTI,
2073 dump_ctx->cmd);
2074 if (!dump_ctx->hdr)
2075 goto nla_put_failure;
2076
2077 devlink = dump_ctx->info->user_ptr[0];
2078 if (devlink_nl_put_handle(dump_ctx->skb, devlink))
2079 goto nla_put_failure;
2080 dump_ctx->nest = nla_nest_start(dump_ctx->skb,
2081 DEVLINK_ATTR_DPIPE_ENTRIES);
2082 if (!dump_ctx->nest)
2083 goto nla_put_failure;
2084 return 0;
2085
2086 nla_put_failure:
2087 nlmsg_free(dump_ctx->skb);
2088 return -EMSGSIZE;
2089 }
2090 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
2091
devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx * dump_ctx,struct devlink_dpipe_entry * entry)2092 int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
2093 struct devlink_dpipe_entry *entry)
2094 {
2095 return devlink_dpipe_entry_put(dump_ctx->skb, entry);
2096 }
2097 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
2098
devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx * dump_ctx)2099 int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
2100 {
2101 nla_nest_end(dump_ctx->skb, dump_ctx->nest);
2102 genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
2103 return 0;
2104 }
2105 EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
2106
devlink_dpipe_entry_clear(struct devlink_dpipe_entry * entry)2107 void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
2108
2109 {
2110 unsigned int value_count, value_index;
2111 struct devlink_dpipe_value *value;
2112
2113 value = entry->action_values;
2114 value_count = entry->action_values_count;
2115 for (value_index = 0; value_index < value_count; value_index++) {
2116 kfree(value[value_index].value);
2117 kfree(value[value_index].mask);
2118 }
2119
2120 value = entry->match_values;
2121 value_count = entry->match_values_count;
2122 for (value_index = 0; value_index < value_count; value_index++) {
2123 kfree(value[value_index].value);
2124 kfree(value[value_index].mask);
2125 }
2126 }
2127 EXPORT_SYMBOL(devlink_dpipe_entry_clear);
2128
devlink_dpipe_entries_fill(struct genl_info * info,enum devlink_command cmd,int flags,struct devlink_dpipe_table * table)2129 static int devlink_dpipe_entries_fill(struct genl_info *info,
2130 enum devlink_command cmd, int flags,
2131 struct devlink_dpipe_table *table)
2132 {
2133 struct devlink_dpipe_dump_ctx dump_ctx;
2134 struct nlmsghdr *nlh;
2135 int err;
2136
2137 dump_ctx.skb = NULL;
2138 dump_ctx.cmd = cmd;
2139 dump_ctx.info = info;
2140
2141 err = table->table_ops->entries_dump(table->priv,
2142 table->counters_enabled,
2143 &dump_ctx);
2144 if (err)
2145 return err;
2146
2147 send_done:
2148 nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
2149 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2150 if (!nlh) {
2151 err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
2152 if (err)
2153 return err;
2154 goto send_done;
2155 }
2156 return genlmsg_reply(dump_ctx.skb, info);
2157 }
2158
devlink_nl_cmd_dpipe_entries_get(struct sk_buff * skb,struct genl_info * info)2159 static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
2160 struct genl_info *info)
2161 {
2162 struct devlink *devlink = info->user_ptr[0];
2163 struct devlink_dpipe_table *table;
2164 const char *table_name;
2165
2166 if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
2167 return -EINVAL;
2168
2169 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2170 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2171 table_name);
2172 if (!table)
2173 return -EINVAL;
2174
2175 if (!table->table_ops->entries_dump)
2176 return -EINVAL;
2177
2178 return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
2179 0, table);
2180 }
2181
devlink_dpipe_fields_put(struct sk_buff * skb,const struct devlink_dpipe_header * header)2182 static int devlink_dpipe_fields_put(struct sk_buff *skb,
2183 const struct devlink_dpipe_header *header)
2184 {
2185 struct devlink_dpipe_field *field;
2186 struct nlattr *field_attr;
2187 int i;
2188
2189 for (i = 0; i < header->fields_count; i++) {
2190 field = &header->fields[i];
2191 field_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_FIELD);
2192 if (!field_attr)
2193 return -EMSGSIZE;
2194 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
2195 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
2196 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
2197 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
2198 goto nla_put_failure;
2199 nla_nest_end(skb, field_attr);
2200 }
2201 return 0;
2202
2203 nla_put_failure:
2204 nla_nest_cancel(skb, field_attr);
2205 return -EMSGSIZE;
2206 }
2207
devlink_dpipe_header_put(struct sk_buff * skb,struct devlink_dpipe_header * header)2208 static int devlink_dpipe_header_put(struct sk_buff *skb,
2209 struct devlink_dpipe_header *header)
2210 {
2211 struct nlattr *fields_attr, *header_attr;
2212 int err;
2213
2214 header_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADER);
2215 if (!header_attr)
2216 return -EMSGSIZE;
2217
2218 if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
2219 nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
2220 nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
2221 goto nla_put_failure;
2222
2223 fields_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
2224 if (!fields_attr)
2225 goto nla_put_failure;
2226
2227 err = devlink_dpipe_fields_put(skb, header);
2228 if (err) {
2229 nla_nest_cancel(skb, fields_attr);
2230 goto nla_put_failure;
2231 }
2232 nla_nest_end(skb, fields_attr);
2233 nla_nest_end(skb, header_attr);
2234 return 0;
2235
2236 nla_put_failure:
2237 err = -EMSGSIZE;
2238 nla_nest_cancel(skb, header_attr);
2239 return err;
2240 }
2241
devlink_dpipe_headers_fill(struct genl_info * info,enum devlink_command cmd,int flags,struct devlink_dpipe_headers * dpipe_headers)2242 static int devlink_dpipe_headers_fill(struct genl_info *info,
2243 enum devlink_command cmd, int flags,
2244 struct devlink_dpipe_headers *
2245 dpipe_headers)
2246 {
2247 struct devlink *devlink = info->user_ptr[0];
2248 struct nlattr *headers_attr;
2249 struct sk_buff *skb = NULL;
2250 struct nlmsghdr *nlh;
2251 void *hdr;
2252 int i, j;
2253 int err;
2254
2255 i = 0;
2256 start_again:
2257 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2258 if (err)
2259 return err;
2260
2261 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2262 &devlink_nl_family, NLM_F_MULTI, cmd);
2263 if (!hdr) {
2264 nlmsg_free(skb);
2265 return -EMSGSIZE;
2266 }
2267
2268 if (devlink_nl_put_handle(skb, devlink))
2269 goto nla_put_failure;
2270 headers_attr = nla_nest_start(skb, DEVLINK_ATTR_DPIPE_HEADERS);
2271 if (!headers_attr)
2272 goto nla_put_failure;
2273
2274 j = 0;
2275 for (; i < dpipe_headers->headers_count; i++) {
2276 err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
2277 if (err) {
2278 if (!j)
2279 goto err_table_put;
2280 break;
2281 }
2282 j++;
2283 }
2284 nla_nest_end(skb, headers_attr);
2285 genlmsg_end(skb, hdr);
2286 if (i != dpipe_headers->headers_count)
2287 goto start_again;
2288
2289 send_done:
2290 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2291 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2292 if (!nlh) {
2293 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2294 if (err)
2295 return err;
2296 goto send_done;
2297 }
2298 return genlmsg_reply(skb, info);
2299
2300 nla_put_failure:
2301 err = -EMSGSIZE;
2302 err_table_put:
2303 nlmsg_free(skb);
2304 return err;
2305 }
2306
devlink_nl_cmd_dpipe_headers_get(struct sk_buff * skb,struct genl_info * info)2307 static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
2308 struct genl_info *info)
2309 {
2310 struct devlink *devlink = info->user_ptr[0];
2311
2312 if (!devlink->dpipe_headers)
2313 return -EOPNOTSUPP;
2314 return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
2315 0, devlink->dpipe_headers);
2316 }
2317
devlink_dpipe_table_counters_set(struct devlink * devlink,const char * table_name,bool enable)2318 static int devlink_dpipe_table_counters_set(struct devlink *devlink,
2319 const char *table_name,
2320 bool enable)
2321 {
2322 struct devlink_dpipe_table *table;
2323
2324 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
2325 table_name);
2326 if (!table)
2327 return -EINVAL;
2328
2329 if (table->counter_control_extern)
2330 return -EOPNOTSUPP;
2331
2332 if (!(table->counters_enabled ^ enable))
2333 return 0;
2334
2335 table->counters_enabled = enable;
2336 if (table->table_ops->counters_set_update)
2337 table->table_ops->counters_set_update(table->priv, enable);
2338 return 0;
2339 }
2340
devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff * skb,struct genl_info * info)2341 static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
2342 struct genl_info *info)
2343 {
2344 struct devlink *devlink = info->user_ptr[0];
2345 const char *table_name;
2346 bool counters_enable;
2347
2348 if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
2349 !info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
2350 return -EINVAL;
2351
2352 table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
2353 counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
2354
2355 return devlink_dpipe_table_counters_set(devlink, table_name,
2356 counters_enable);
2357 }
2358
2359 static struct devlink_resource *
devlink_resource_find(struct devlink * devlink,struct devlink_resource * resource,u64 resource_id)2360 devlink_resource_find(struct devlink *devlink,
2361 struct devlink_resource *resource, u64 resource_id)
2362 {
2363 struct list_head *resource_list;
2364
2365 if (resource)
2366 resource_list = &resource->resource_list;
2367 else
2368 resource_list = &devlink->resource_list;
2369
2370 list_for_each_entry(resource, resource_list, list) {
2371 struct devlink_resource *child_resource;
2372
2373 if (resource->id == resource_id)
2374 return resource;
2375
2376 child_resource = devlink_resource_find(devlink, resource,
2377 resource_id);
2378 if (child_resource)
2379 return child_resource;
2380 }
2381 return NULL;
2382 }
2383
2384 static void
devlink_resource_validate_children(struct devlink_resource * resource)2385 devlink_resource_validate_children(struct devlink_resource *resource)
2386 {
2387 struct devlink_resource *child_resource;
2388 bool size_valid = true;
2389 u64 parts_size = 0;
2390
2391 if (list_empty(&resource->resource_list))
2392 goto out;
2393
2394 list_for_each_entry(child_resource, &resource->resource_list, list)
2395 parts_size += child_resource->size_new;
2396
2397 if (parts_size > resource->size_new)
2398 size_valid = false;
2399 out:
2400 resource->size_valid = size_valid;
2401 }
2402
2403 static int
devlink_resource_validate_size(struct devlink_resource * resource,u64 size,struct netlink_ext_ack * extack)2404 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
2405 struct netlink_ext_ack *extack)
2406 {
2407 u64 reminder;
2408 int err = 0;
2409
2410 if (size > resource->size_params.size_max) {
2411 NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
2412 err = -EINVAL;
2413 }
2414
2415 if (size < resource->size_params.size_min) {
2416 NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
2417 err = -EINVAL;
2418 }
2419
2420 div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
2421 if (reminder) {
2422 NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
2423 err = -EINVAL;
2424 }
2425
2426 return err;
2427 }
2428
devlink_nl_cmd_resource_set(struct sk_buff * skb,struct genl_info * info)2429 static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
2430 struct genl_info *info)
2431 {
2432 struct devlink *devlink = info->user_ptr[0];
2433 struct devlink_resource *resource;
2434 u64 resource_id;
2435 u64 size;
2436 int err;
2437
2438 if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
2439 !info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
2440 return -EINVAL;
2441 resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
2442
2443 resource = devlink_resource_find(devlink, NULL, resource_id);
2444 if (!resource)
2445 return -EINVAL;
2446
2447 size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
2448 err = devlink_resource_validate_size(resource, size, info->extack);
2449 if (err)
2450 return err;
2451
2452 resource->size_new = size;
2453 devlink_resource_validate_children(resource);
2454 if (resource->parent)
2455 devlink_resource_validate_children(resource->parent);
2456 return 0;
2457 }
2458
2459 static int
devlink_resource_size_params_put(struct devlink_resource * resource,struct sk_buff * skb)2460 devlink_resource_size_params_put(struct devlink_resource *resource,
2461 struct sk_buff *skb)
2462 {
2463 struct devlink_resource_size_params *size_params;
2464
2465 size_params = &resource->size_params;
2466 if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
2467 size_params->size_granularity, DEVLINK_ATTR_PAD) ||
2468 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
2469 size_params->size_max, DEVLINK_ATTR_PAD) ||
2470 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
2471 size_params->size_min, DEVLINK_ATTR_PAD) ||
2472 nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
2473 return -EMSGSIZE;
2474 return 0;
2475 }
2476
devlink_resource_occ_put(struct devlink_resource * resource,struct sk_buff * skb)2477 static int devlink_resource_occ_put(struct devlink_resource *resource,
2478 struct sk_buff *skb)
2479 {
2480 if (!resource->occ_get)
2481 return 0;
2482 return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
2483 resource->occ_get(resource->occ_get_priv),
2484 DEVLINK_ATTR_PAD);
2485 }
2486
devlink_resource_put(struct devlink * devlink,struct sk_buff * skb,struct devlink_resource * resource)2487 static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
2488 struct devlink_resource *resource)
2489 {
2490 struct devlink_resource *child_resource;
2491 struct nlattr *child_resource_attr;
2492 struct nlattr *resource_attr;
2493
2494 resource_attr = nla_nest_start(skb, DEVLINK_ATTR_RESOURCE);
2495 if (!resource_attr)
2496 return -EMSGSIZE;
2497
2498 if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
2499 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
2500 DEVLINK_ATTR_PAD) ||
2501 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
2502 DEVLINK_ATTR_PAD))
2503 goto nla_put_failure;
2504 if (resource->size != resource->size_new)
2505 nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
2506 resource->size_new, DEVLINK_ATTR_PAD);
2507 if (devlink_resource_occ_put(resource, skb))
2508 goto nla_put_failure;
2509 if (devlink_resource_size_params_put(resource, skb))
2510 goto nla_put_failure;
2511 if (list_empty(&resource->resource_list))
2512 goto out;
2513
2514 if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
2515 resource->size_valid))
2516 goto nla_put_failure;
2517
2518 child_resource_attr = nla_nest_start(skb, DEVLINK_ATTR_RESOURCE_LIST);
2519 if (!child_resource_attr)
2520 goto nla_put_failure;
2521
2522 list_for_each_entry(child_resource, &resource->resource_list, list) {
2523 if (devlink_resource_put(devlink, skb, child_resource))
2524 goto resource_put_failure;
2525 }
2526
2527 nla_nest_end(skb, child_resource_attr);
2528 out:
2529 nla_nest_end(skb, resource_attr);
2530 return 0;
2531
2532 resource_put_failure:
2533 nla_nest_cancel(skb, child_resource_attr);
2534 nla_put_failure:
2535 nla_nest_cancel(skb, resource_attr);
2536 return -EMSGSIZE;
2537 }
2538
devlink_resource_fill(struct genl_info * info,enum devlink_command cmd,int flags)2539 static int devlink_resource_fill(struct genl_info *info,
2540 enum devlink_command cmd, int flags)
2541 {
2542 struct devlink *devlink = info->user_ptr[0];
2543 struct devlink_resource *resource;
2544 struct nlattr *resources_attr;
2545 struct sk_buff *skb = NULL;
2546 struct nlmsghdr *nlh;
2547 bool incomplete;
2548 void *hdr;
2549 int i;
2550 int err;
2551
2552 resource = list_first_entry(&devlink->resource_list,
2553 struct devlink_resource, list);
2554 start_again:
2555 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2556 if (err)
2557 return err;
2558
2559 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
2560 &devlink_nl_family, NLM_F_MULTI, cmd);
2561 if (!hdr) {
2562 nlmsg_free(skb);
2563 return -EMSGSIZE;
2564 }
2565
2566 if (devlink_nl_put_handle(skb, devlink))
2567 goto nla_put_failure;
2568
2569 resources_attr = nla_nest_start(skb, DEVLINK_ATTR_RESOURCE_LIST);
2570 if (!resources_attr)
2571 goto nla_put_failure;
2572
2573 incomplete = false;
2574 i = 0;
2575 list_for_each_entry_from(resource, &devlink->resource_list, list) {
2576 err = devlink_resource_put(devlink, skb, resource);
2577 if (err) {
2578 if (!i)
2579 goto err_resource_put;
2580 incomplete = true;
2581 break;
2582 }
2583 i++;
2584 }
2585 nla_nest_end(skb, resources_attr);
2586 genlmsg_end(skb, hdr);
2587 if (incomplete)
2588 goto start_again;
2589 send_done:
2590 nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
2591 NLMSG_DONE, 0, flags | NLM_F_MULTI);
2592 if (!nlh) {
2593 err = devlink_dpipe_send_and_alloc_skb(&skb, info);
2594 if (err)
2595 return err;
2596 goto send_done;
2597 }
2598 return genlmsg_reply(skb, info);
2599
2600 nla_put_failure:
2601 err = -EMSGSIZE;
2602 err_resource_put:
2603 nlmsg_free(skb);
2604 return err;
2605 }
2606
devlink_nl_cmd_resource_dump(struct sk_buff * skb,struct genl_info * info)2607 static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
2608 struct genl_info *info)
2609 {
2610 struct devlink *devlink = info->user_ptr[0];
2611
2612 if (list_empty(&devlink->resource_list))
2613 return -EOPNOTSUPP;
2614
2615 return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
2616 }
2617
2618 static int
devlink_resources_validate(struct devlink * devlink,struct devlink_resource * resource,struct genl_info * info)2619 devlink_resources_validate(struct devlink *devlink,
2620 struct devlink_resource *resource,
2621 struct genl_info *info)
2622 {
2623 struct list_head *resource_list;
2624 int err = 0;
2625
2626 if (resource)
2627 resource_list = &resource->resource_list;
2628 else
2629 resource_list = &devlink->resource_list;
2630
2631 list_for_each_entry(resource, resource_list, list) {
2632 if (!resource->size_valid)
2633 return -EINVAL;
2634 err = devlink_resources_validate(devlink, resource, info);
2635 if (err)
2636 return err;
2637 }
2638 return err;
2639 }
2640
devlink_nl_cmd_reload(struct sk_buff * skb,struct genl_info * info)2641 static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
2642 {
2643 struct devlink *devlink = info->user_ptr[0];
2644 int err;
2645
2646 if (!devlink->ops->reload)
2647 return -EOPNOTSUPP;
2648
2649 err = devlink_resources_validate(devlink, NULL, info);
2650 if (err) {
2651 NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
2652 return err;
2653 }
2654 return devlink->ops->reload(devlink, info->extack);
2655 }
2656
2657 static const struct devlink_param devlink_param_generic[] = {
2658 {
2659 .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
2660 .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
2661 .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
2662 },
2663 {
2664 .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
2665 .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
2666 .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
2667 },
2668 {
2669 .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
2670 .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
2671 .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
2672 },
2673 {
2674 .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
2675 .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
2676 .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
2677 },
2678 };
2679
devlink_param_generic_verify(const struct devlink_param * param)2680 static int devlink_param_generic_verify(const struct devlink_param *param)
2681 {
2682 /* verify it match generic parameter by id and name */
2683 if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
2684 return -EINVAL;
2685 if (strcmp(param->name, devlink_param_generic[param->id].name))
2686 return -ENOENT;
2687
2688 WARN_ON(param->type != devlink_param_generic[param->id].type);
2689
2690 return 0;
2691 }
2692
devlink_param_driver_verify(const struct devlink_param * param)2693 static int devlink_param_driver_verify(const struct devlink_param *param)
2694 {
2695 int i;
2696
2697 if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
2698 return -EINVAL;
2699 /* verify no such name in generic params */
2700 for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
2701 if (!strcmp(param->name, devlink_param_generic[i].name))
2702 return -EEXIST;
2703
2704 return 0;
2705 }
2706
2707 static struct devlink_param_item *
devlink_param_find_by_name(struct list_head * param_list,const char * param_name)2708 devlink_param_find_by_name(struct list_head *param_list,
2709 const char *param_name)
2710 {
2711 struct devlink_param_item *param_item;
2712
2713 list_for_each_entry(param_item, param_list, list)
2714 if (!strcmp(param_item->param->name, param_name))
2715 return param_item;
2716 return NULL;
2717 }
2718
2719 static struct devlink_param_item *
devlink_param_find_by_id(struct list_head * param_list,u32 param_id)2720 devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
2721 {
2722 struct devlink_param_item *param_item;
2723
2724 list_for_each_entry(param_item, param_list, list)
2725 if (param_item->param->id == param_id)
2726 return param_item;
2727 return NULL;
2728 }
2729
2730 static bool
devlink_param_cmode_is_supported(const struct devlink_param * param,enum devlink_param_cmode cmode)2731 devlink_param_cmode_is_supported(const struct devlink_param *param,
2732 enum devlink_param_cmode cmode)
2733 {
2734 return test_bit(cmode, ¶m->supported_cmodes);
2735 }
2736
devlink_param_get(struct devlink * devlink,const struct devlink_param * param,struct devlink_param_gset_ctx * ctx)2737 static int devlink_param_get(struct devlink *devlink,
2738 const struct devlink_param *param,
2739 struct devlink_param_gset_ctx *ctx)
2740 {
2741 if (!param->get)
2742 return -EOPNOTSUPP;
2743 return param->get(devlink, param->id, ctx);
2744 }
2745
devlink_param_set(struct devlink * devlink,const struct devlink_param * param,struct devlink_param_gset_ctx * ctx)2746 static int devlink_param_set(struct devlink *devlink,
2747 const struct devlink_param *param,
2748 struct devlink_param_gset_ctx *ctx)
2749 {
2750 if (!param->set)
2751 return -EOPNOTSUPP;
2752 return param->set(devlink, param->id, ctx);
2753 }
2754
2755 static int
devlink_param_type_to_nla_type(enum devlink_param_type param_type)2756 devlink_param_type_to_nla_type(enum devlink_param_type param_type)
2757 {
2758 switch (param_type) {
2759 case DEVLINK_PARAM_TYPE_U8:
2760 return NLA_U8;
2761 case DEVLINK_PARAM_TYPE_U16:
2762 return NLA_U16;
2763 case DEVLINK_PARAM_TYPE_U32:
2764 return NLA_U32;
2765 case DEVLINK_PARAM_TYPE_STRING:
2766 return NLA_STRING;
2767 case DEVLINK_PARAM_TYPE_BOOL:
2768 return NLA_FLAG;
2769 default:
2770 return -EINVAL;
2771 }
2772 }
2773
2774 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)2775 devlink_nl_param_value_fill_one(struct sk_buff *msg,
2776 enum devlink_param_type type,
2777 enum devlink_param_cmode cmode,
2778 union devlink_param_value val)
2779 {
2780 struct nlattr *param_value_attr;
2781
2782 param_value_attr = nla_nest_start(msg, DEVLINK_ATTR_PARAM_VALUE);
2783 if (!param_value_attr)
2784 goto nla_put_failure;
2785
2786 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
2787 goto value_nest_cancel;
2788
2789 switch (type) {
2790 case DEVLINK_PARAM_TYPE_U8:
2791 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
2792 goto value_nest_cancel;
2793 break;
2794 case DEVLINK_PARAM_TYPE_U16:
2795 if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
2796 goto value_nest_cancel;
2797 break;
2798 case DEVLINK_PARAM_TYPE_U32:
2799 if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
2800 goto value_nest_cancel;
2801 break;
2802 case DEVLINK_PARAM_TYPE_STRING:
2803 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
2804 val.vstr))
2805 goto value_nest_cancel;
2806 break;
2807 case DEVLINK_PARAM_TYPE_BOOL:
2808 if (val.vbool &&
2809 nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
2810 goto value_nest_cancel;
2811 break;
2812 }
2813
2814 nla_nest_end(msg, param_value_attr);
2815 return 0;
2816
2817 value_nest_cancel:
2818 nla_nest_cancel(msg, param_value_attr);
2819 nla_put_failure:
2820 return -EMSGSIZE;
2821 }
2822
devlink_nl_param_fill(struct sk_buff * msg,struct devlink * devlink,struct devlink_param_item * param_item,enum devlink_command cmd,u32 portid,u32 seq,int flags)2823 static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
2824 struct devlink_param_item *param_item,
2825 enum devlink_command cmd,
2826 u32 portid, u32 seq, int flags)
2827 {
2828 union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
2829 const struct devlink_param *param = param_item->param;
2830 struct devlink_param_gset_ctx ctx;
2831 struct nlattr *param_values_list;
2832 struct nlattr *param_attr;
2833 int nla_type;
2834 void *hdr;
2835 int err;
2836 int i;
2837
2838 /* Get value from driver part to driverinit configuration mode */
2839 for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
2840 if (!devlink_param_cmode_is_supported(param, i))
2841 continue;
2842 if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
2843 if (!param_item->driverinit_value_valid)
2844 return -EOPNOTSUPP;
2845 param_value[i] = param_item->driverinit_value;
2846 } else {
2847 ctx.cmode = i;
2848 err = devlink_param_get(devlink, param, &ctx);
2849 if (err)
2850 return err;
2851 param_value[i] = ctx.val;
2852 }
2853 }
2854
2855 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
2856 if (!hdr)
2857 return -EMSGSIZE;
2858
2859 if (devlink_nl_put_handle(msg, devlink))
2860 goto genlmsg_cancel;
2861 param_attr = nla_nest_start(msg, DEVLINK_ATTR_PARAM);
2862 if (!param_attr)
2863 goto genlmsg_cancel;
2864 if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
2865 goto param_nest_cancel;
2866 if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
2867 goto param_nest_cancel;
2868
2869 nla_type = devlink_param_type_to_nla_type(param->type);
2870 if (nla_type < 0)
2871 goto param_nest_cancel;
2872 if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
2873 goto param_nest_cancel;
2874
2875 param_values_list = nla_nest_start(msg, DEVLINK_ATTR_PARAM_VALUES_LIST);
2876 if (!param_values_list)
2877 goto param_nest_cancel;
2878
2879 for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
2880 if (!devlink_param_cmode_is_supported(param, i))
2881 continue;
2882 err = devlink_nl_param_value_fill_one(msg, param->type,
2883 i, param_value[i]);
2884 if (err)
2885 goto values_list_nest_cancel;
2886 }
2887
2888 nla_nest_end(msg, param_values_list);
2889 nla_nest_end(msg, param_attr);
2890 genlmsg_end(msg, hdr);
2891 return 0;
2892
2893 values_list_nest_cancel:
2894 nla_nest_end(msg, param_values_list);
2895 param_nest_cancel:
2896 nla_nest_cancel(msg, param_attr);
2897 genlmsg_cancel:
2898 genlmsg_cancel(msg, hdr);
2899 return -EMSGSIZE;
2900 }
2901
devlink_param_notify(struct devlink * devlink,struct devlink_param_item * param_item,enum devlink_command cmd)2902 static void devlink_param_notify(struct devlink *devlink,
2903 struct devlink_param_item *param_item,
2904 enum devlink_command cmd)
2905 {
2906 struct sk_buff *msg;
2907 int err;
2908
2909 WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL);
2910
2911 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2912 if (!msg)
2913 return;
2914 err = devlink_nl_param_fill(msg, devlink, param_item, cmd, 0, 0, 0);
2915 if (err) {
2916 nlmsg_free(msg);
2917 return;
2918 }
2919
2920 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
2921 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
2922 }
2923
devlink_nl_cmd_param_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)2924 static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
2925 struct netlink_callback *cb)
2926 {
2927 struct devlink_param_item *param_item;
2928 struct devlink *devlink;
2929 int start = cb->args[0];
2930 int idx = 0;
2931 int err;
2932
2933 mutex_lock(&devlink_mutex);
2934 list_for_each_entry(devlink, &devlink_list, list) {
2935 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
2936 continue;
2937 mutex_lock(&devlink->lock);
2938 list_for_each_entry(param_item, &devlink->param_list, list) {
2939 if (idx < start) {
2940 idx++;
2941 continue;
2942 }
2943 err = devlink_nl_param_fill(msg, devlink, param_item,
2944 DEVLINK_CMD_PARAM_GET,
2945 NETLINK_CB(cb->skb).portid,
2946 cb->nlh->nlmsg_seq,
2947 NLM_F_MULTI);
2948 if (err) {
2949 mutex_unlock(&devlink->lock);
2950 goto out;
2951 }
2952 idx++;
2953 }
2954 mutex_unlock(&devlink->lock);
2955 }
2956 out:
2957 mutex_unlock(&devlink_mutex);
2958
2959 cb->args[0] = idx;
2960 return msg->len;
2961 }
2962
2963 static int
devlink_param_type_get_from_info(struct genl_info * info,enum devlink_param_type * param_type)2964 devlink_param_type_get_from_info(struct genl_info *info,
2965 enum devlink_param_type *param_type)
2966 {
2967 if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
2968 return -EINVAL;
2969
2970 switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
2971 case NLA_U8:
2972 *param_type = DEVLINK_PARAM_TYPE_U8;
2973 break;
2974 case NLA_U16:
2975 *param_type = DEVLINK_PARAM_TYPE_U16;
2976 break;
2977 case NLA_U32:
2978 *param_type = DEVLINK_PARAM_TYPE_U32;
2979 break;
2980 case NLA_STRING:
2981 *param_type = DEVLINK_PARAM_TYPE_STRING;
2982 break;
2983 case NLA_FLAG:
2984 *param_type = DEVLINK_PARAM_TYPE_BOOL;
2985 break;
2986 default:
2987 return -EINVAL;
2988 }
2989
2990 return 0;
2991 }
2992
2993 static int
devlink_param_value_get_from_info(const struct devlink_param * param,struct genl_info * info,union devlink_param_value * value)2994 devlink_param_value_get_from_info(const struct devlink_param *param,
2995 struct genl_info *info,
2996 union devlink_param_value *value)
2997 {
2998 int len;
2999
3000 if (param->type != DEVLINK_PARAM_TYPE_BOOL &&
3001 !info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])
3002 return -EINVAL;
3003
3004 switch (param->type) {
3005 case DEVLINK_PARAM_TYPE_U8:
3006 value->vu8 = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3007 break;
3008 case DEVLINK_PARAM_TYPE_U16:
3009 value->vu16 = nla_get_u16(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3010 break;
3011 case DEVLINK_PARAM_TYPE_U32:
3012 value->vu32 = nla_get_u32(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
3013 break;
3014 case DEVLINK_PARAM_TYPE_STRING:
3015 len = strnlen(nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]),
3016 nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3017 if (len == nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) ||
3018 len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
3019 return -EINVAL;
3020 strcpy(value->vstr,
3021 nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
3022 break;
3023 case DEVLINK_PARAM_TYPE_BOOL:
3024 value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
3025 true : false;
3026 break;
3027 }
3028 return 0;
3029 }
3030
3031 static struct devlink_param_item *
devlink_param_get_from_info(struct devlink * devlink,struct genl_info * info)3032 devlink_param_get_from_info(struct devlink *devlink,
3033 struct genl_info *info)
3034 {
3035 char *param_name;
3036
3037 if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
3038 return NULL;
3039
3040 param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
3041 return devlink_param_find_by_name(&devlink->param_list, param_name);
3042 }
3043
devlink_nl_cmd_param_get_doit(struct sk_buff * skb,struct genl_info * info)3044 static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
3045 struct genl_info *info)
3046 {
3047 struct devlink *devlink = info->user_ptr[0];
3048 struct devlink_param_item *param_item;
3049 struct sk_buff *msg;
3050 int err;
3051
3052 param_item = devlink_param_get_from_info(devlink, info);
3053 if (!param_item)
3054 return -EINVAL;
3055
3056 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3057 if (!msg)
3058 return -ENOMEM;
3059
3060 err = devlink_nl_param_fill(msg, devlink, param_item,
3061 DEVLINK_CMD_PARAM_GET,
3062 info->snd_portid, info->snd_seq, 0);
3063 if (err) {
3064 nlmsg_free(msg);
3065 return err;
3066 }
3067
3068 return genlmsg_reply(msg, info);
3069 }
3070
devlink_nl_cmd_param_set_doit(struct sk_buff * skb,struct genl_info * info)3071 static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
3072 struct genl_info *info)
3073 {
3074 struct devlink *devlink = info->user_ptr[0];
3075 enum devlink_param_type param_type;
3076 struct devlink_param_gset_ctx ctx;
3077 enum devlink_param_cmode cmode;
3078 struct devlink_param_item *param_item;
3079 const struct devlink_param *param;
3080 union devlink_param_value value;
3081 int err = 0;
3082
3083 param_item = devlink_param_get_from_info(devlink, info);
3084 if (!param_item)
3085 return -EINVAL;
3086 param = param_item->param;
3087 err = devlink_param_type_get_from_info(info, ¶m_type);
3088 if (err)
3089 return err;
3090 if (param_type != param->type)
3091 return -EINVAL;
3092 err = devlink_param_value_get_from_info(param, info, &value);
3093 if (err)
3094 return err;
3095 if (param->validate) {
3096 err = param->validate(devlink, param->id, value, info->extack);
3097 if (err)
3098 return err;
3099 }
3100
3101 if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
3102 return -EINVAL;
3103 cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
3104 if (!devlink_param_cmode_is_supported(param, cmode))
3105 return -EOPNOTSUPP;
3106
3107 if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
3108 if (param->type == DEVLINK_PARAM_TYPE_STRING)
3109 strcpy(param_item->driverinit_value.vstr, value.vstr);
3110 else
3111 param_item->driverinit_value = value;
3112 param_item->driverinit_value_valid = true;
3113 } else {
3114 if (!param->set)
3115 return -EOPNOTSUPP;
3116 ctx.val = value;
3117 ctx.cmode = cmode;
3118 err = devlink_param_set(devlink, param, &ctx);
3119 if (err)
3120 return err;
3121 }
3122
3123 devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
3124 return 0;
3125 }
3126
devlink_param_register_one(struct devlink * devlink,const struct devlink_param * param)3127 static int devlink_param_register_one(struct devlink *devlink,
3128 const struct devlink_param *param)
3129 {
3130 struct devlink_param_item *param_item;
3131
3132 if (devlink_param_find_by_name(&devlink->param_list,
3133 param->name))
3134 return -EEXIST;
3135
3136 if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
3137 WARN_ON(param->get || param->set);
3138 else
3139 WARN_ON(!param->get || !param->set);
3140
3141 param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
3142 if (!param_item)
3143 return -ENOMEM;
3144 param_item->param = param;
3145
3146 list_add_tail(¶m_item->list, &devlink->param_list);
3147 devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
3148 return 0;
3149 }
3150
devlink_param_unregister_one(struct devlink * devlink,const struct devlink_param * param)3151 static void devlink_param_unregister_one(struct devlink *devlink,
3152 const struct devlink_param *param)
3153 {
3154 struct devlink_param_item *param_item;
3155
3156 param_item = devlink_param_find_by_name(&devlink->param_list,
3157 param->name);
3158 WARN_ON(!param_item);
3159 devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_DEL);
3160 list_del(¶m_item->list);
3161 kfree(param_item);
3162 }
3163
devlink_nl_region_snapshot_id_put(struct sk_buff * msg,struct devlink * devlink,struct devlink_snapshot * snapshot)3164 static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
3165 struct devlink *devlink,
3166 struct devlink_snapshot *snapshot)
3167 {
3168 struct nlattr *snap_attr;
3169 int err;
3170
3171 snap_attr = nla_nest_start(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
3172 if (!snap_attr)
3173 return -EINVAL;
3174
3175 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
3176 if (err)
3177 goto nla_put_failure;
3178
3179 nla_nest_end(msg, snap_attr);
3180 return 0;
3181
3182 nla_put_failure:
3183 nla_nest_cancel(msg, snap_attr);
3184 return err;
3185 }
3186
devlink_nl_region_snapshots_id_put(struct sk_buff * msg,struct devlink * devlink,struct devlink_region * region)3187 static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
3188 struct devlink *devlink,
3189 struct devlink_region *region)
3190 {
3191 struct devlink_snapshot *snapshot;
3192 struct nlattr *snapshots_attr;
3193 int err;
3194
3195 snapshots_attr = nla_nest_start(msg, DEVLINK_ATTR_REGION_SNAPSHOTS);
3196 if (!snapshots_attr)
3197 return -EINVAL;
3198
3199 list_for_each_entry(snapshot, ®ion->snapshot_list, list) {
3200 err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
3201 if (err)
3202 goto nla_put_failure;
3203 }
3204
3205 nla_nest_end(msg, snapshots_attr);
3206 return 0;
3207
3208 nla_put_failure:
3209 nla_nest_cancel(msg, snapshots_attr);
3210 return err;
3211 }
3212
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)3213 static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
3214 enum devlink_command cmd, u32 portid,
3215 u32 seq, int flags,
3216 struct devlink_region *region)
3217 {
3218 void *hdr;
3219 int err;
3220
3221 hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
3222 if (!hdr)
3223 return -EMSGSIZE;
3224
3225 err = devlink_nl_put_handle(msg, devlink);
3226 if (err)
3227 goto nla_put_failure;
3228
3229 err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->name);
3230 if (err)
3231 goto nla_put_failure;
3232
3233 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3234 region->size,
3235 DEVLINK_ATTR_PAD);
3236 if (err)
3237 goto nla_put_failure;
3238
3239 err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
3240 if (err)
3241 goto nla_put_failure;
3242
3243 genlmsg_end(msg, hdr);
3244 return 0;
3245
3246 nla_put_failure:
3247 genlmsg_cancel(msg, hdr);
3248 return err;
3249 }
3250
devlink_nl_region_notify(struct devlink_region * region,struct devlink_snapshot * snapshot,enum devlink_command cmd)3251 static void devlink_nl_region_notify(struct devlink_region *region,
3252 struct devlink_snapshot *snapshot,
3253 enum devlink_command cmd)
3254 {
3255 struct devlink *devlink = region->devlink;
3256 struct sk_buff *msg;
3257 void *hdr;
3258 int err;
3259
3260 WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
3261
3262 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3263 if (!msg)
3264 return;
3265
3266 hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
3267 if (!hdr)
3268 goto out_free_msg;
3269
3270 err = devlink_nl_put_handle(msg, devlink);
3271 if (err)
3272 goto out_cancel_msg;
3273
3274 err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
3275 region->name);
3276 if (err)
3277 goto out_cancel_msg;
3278
3279 if (snapshot) {
3280 err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
3281 snapshot->id);
3282 if (err)
3283 goto out_cancel_msg;
3284 } else {
3285 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
3286 region->size, DEVLINK_ATTR_PAD);
3287 if (err)
3288 goto out_cancel_msg;
3289 }
3290 genlmsg_end(msg, hdr);
3291
3292 genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
3293 msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
3294
3295 return;
3296
3297 out_cancel_msg:
3298 genlmsg_cancel(msg, hdr);
3299 out_free_msg:
3300 nlmsg_free(msg);
3301 }
3302
devlink_nl_cmd_region_get_doit(struct sk_buff * skb,struct genl_info * info)3303 static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
3304 struct genl_info *info)
3305 {
3306 struct devlink *devlink = info->user_ptr[0];
3307 struct devlink_region *region;
3308 const char *region_name;
3309 struct sk_buff *msg;
3310 int err;
3311
3312 if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
3313 return -EINVAL;
3314
3315 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3316 region = devlink_region_get_by_name(devlink, region_name);
3317 if (!region)
3318 return -EINVAL;
3319
3320 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3321 if (!msg)
3322 return -ENOMEM;
3323
3324 err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
3325 info->snd_portid, info->snd_seq, 0,
3326 region);
3327 if (err) {
3328 nlmsg_free(msg);
3329 return err;
3330 }
3331
3332 return genlmsg_reply(msg, info);
3333 }
3334
devlink_nl_cmd_region_get_dumpit(struct sk_buff * msg,struct netlink_callback * cb)3335 static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
3336 struct netlink_callback *cb)
3337 {
3338 struct devlink_region *region;
3339 struct devlink *devlink;
3340 int start = cb->args[0];
3341 int idx = 0;
3342 int err;
3343
3344 mutex_lock(&devlink_mutex);
3345 list_for_each_entry(devlink, &devlink_list, list) {
3346 if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
3347 continue;
3348
3349 mutex_lock(&devlink->lock);
3350 list_for_each_entry(region, &devlink->region_list, list) {
3351 if (idx < start) {
3352 idx++;
3353 continue;
3354 }
3355 err = devlink_nl_region_fill(msg, devlink,
3356 DEVLINK_CMD_REGION_GET,
3357 NETLINK_CB(cb->skb).portid,
3358 cb->nlh->nlmsg_seq,
3359 NLM_F_MULTI, region);
3360 if (err) {
3361 mutex_unlock(&devlink->lock);
3362 goto out;
3363 }
3364 idx++;
3365 }
3366 mutex_unlock(&devlink->lock);
3367 }
3368 out:
3369 mutex_unlock(&devlink_mutex);
3370 cb->args[0] = idx;
3371 return msg->len;
3372 }
3373
devlink_nl_cmd_region_del(struct sk_buff * skb,struct genl_info * info)3374 static int devlink_nl_cmd_region_del(struct sk_buff *skb,
3375 struct genl_info *info)
3376 {
3377 struct devlink *devlink = info->user_ptr[0];
3378 struct devlink_snapshot *snapshot;
3379 struct devlink_region *region;
3380 const char *region_name;
3381 u32 snapshot_id;
3382
3383 if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
3384 !info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
3385 return -EINVAL;
3386
3387 region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
3388 snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3389
3390 region = devlink_region_get_by_name(devlink, region_name);
3391 if (!region)
3392 return -EINVAL;
3393
3394 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3395 if (!snapshot)
3396 return -EINVAL;
3397
3398 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
3399 devlink_region_snapshot_del(snapshot);
3400 return 0;
3401 }
3402
devlink_nl_cmd_region_read_chunk_fill(struct sk_buff * msg,struct devlink * devlink,u8 * chunk,u32 chunk_size,u64 addr)3403 static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
3404 struct devlink *devlink,
3405 u8 *chunk, u32 chunk_size,
3406 u64 addr)
3407 {
3408 struct nlattr *chunk_attr;
3409 int err;
3410
3411 chunk_attr = nla_nest_start(msg, DEVLINK_ATTR_REGION_CHUNK);
3412 if (!chunk_attr)
3413 return -EINVAL;
3414
3415 err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
3416 if (err)
3417 goto nla_put_failure;
3418
3419 err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
3420 DEVLINK_ATTR_PAD);
3421 if (err)
3422 goto nla_put_failure;
3423
3424 nla_nest_end(msg, chunk_attr);
3425 return 0;
3426
3427 nla_put_failure:
3428 nla_nest_cancel(msg, chunk_attr);
3429 return err;
3430 }
3431
3432 #define DEVLINK_REGION_READ_CHUNK_SIZE 256
3433
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,bool dump,u64 * new_offset)3434 static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
3435 struct devlink *devlink,
3436 struct devlink_region *region,
3437 struct nlattr **attrs,
3438 u64 start_offset,
3439 u64 end_offset,
3440 bool dump,
3441 u64 *new_offset)
3442 {
3443 struct devlink_snapshot *snapshot;
3444 u64 curr_offset = start_offset;
3445 u32 snapshot_id;
3446 int err = 0;
3447
3448 *new_offset = start_offset;
3449
3450 snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
3451 snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
3452 if (!snapshot)
3453 return -EINVAL;
3454
3455 if (end_offset > snapshot->data_len || dump)
3456 end_offset = snapshot->data_len;
3457
3458 while (curr_offset < end_offset) {
3459 u32 data_size;
3460 u8 *data;
3461
3462 if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
3463 data_size = end_offset - curr_offset;
3464 else
3465 data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
3466
3467 data = &snapshot->data[curr_offset];
3468 err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
3469 data, data_size,
3470 curr_offset);
3471 if (err)
3472 break;
3473
3474 curr_offset += data_size;
3475 }
3476 *new_offset = curr_offset;
3477
3478 return err;
3479 }
3480
devlink_nl_cmd_region_read_dumpit(struct sk_buff * skb,struct netlink_callback * cb)3481 static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
3482 struct netlink_callback *cb)
3483 {
3484 u64 ret_offset, start_offset, end_offset = 0;
3485 struct nlattr *attrs[DEVLINK_ATTR_MAX + 1];
3486 const struct genl_ops *ops = cb->data;
3487 struct devlink_region *region;
3488 struct nlattr *chunks_attr;
3489 const char *region_name;
3490 struct devlink *devlink;
3491 bool dump = true;
3492 void *hdr;
3493 int err;
3494
3495 start_offset = *((u64 *)&cb->args[0]);
3496
3497 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + devlink_nl_family.hdrsize,
3498 attrs, DEVLINK_ATTR_MAX, ops->policy, NULL);
3499 if (err)
3500 goto out;
3501
3502 devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
3503 if (IS_ERR(devlink))
3504 goto out;
3505
3506 mutex_lock(&devlink_mutex);
3507 mutex_lock(&devlink->lock);
3508
3509 if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
3510 !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
3511 goto out_unlock;
3512
3513 region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
3514 region = devlink_region_get_by_name(devlink, region_name);
3515 if (!region)
3516 goto out_unlock;
3517
3518 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
3519 &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
3520 DEVLINK_CMD_REGION_READ);
3521 if (!hdr)
3522 goto out_unlock;
3523
3524 err = devlink_nl_put_handle(skb, devlink);
3525 if (err)
3526 goto nla_put_failure;
3527
3528 err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
3529 if (err)
3530 goto nla_put_failure;
3531
3532 chunks_attr = nla_nest_start(skb, DEVLINK_ATTR_REGION_CHUNKS);
3533 if (!chunks_attr)
3534 goto nla_put_failure;
3535
3536 if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
3537 attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
3538 if (!start_offset)
3539 start_offset =
3540 nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
3541
3542 end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
3543 end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
3544 dump = false;
3545 }
3546
3547 err = devlink_nl_region_read_snapshot_fill(skb, devlink,
3548 region, attrs,
3549 start_offset,
3550 end_offset, dump,
3551 &ret_offset);
3552
3553 if (err && err != -EMSGSIZE)
3554 goto nla_put_failure;
3555
3556 /* Check if there was any progress done to prevent infinite loop */
3557 if (ret_offset == start_offset)
3558 goto nla_put_failure;
3559
3560 *((u64 *)&cb->args[0]) = ret_offset;
3561
3562 nla_nest_end(skb, chunks_attr);
3563 genlmsg_end(skb, hdr);
3564 mutex_unlock(&devlink->lock);
3565 mutex_unlock(&devlink_mutex);
3566
3567 return skb->len;
3568
3569 nla_put_failure:
3570 genlmsg_cancel(skb, hdr);
3571 out_unlock:
3572 mutex_unlock(&devlink->lock);
3573 mutex_unlock(&devlink_mutex);
3574 out:
3575 return 0;
3576 }
3577
3578 static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
3579 [DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
3580 [DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
3581 [DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
3582 [DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
3583 [DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
3584 [DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
3585 [DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
3586 [DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
3587 [DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
3588 [DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
3589 [DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
3590 [DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
3591 [DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
3592 [DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
3593 [DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
3594 [DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
3595 [DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
3596 [DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
3597 [DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
3598 [DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
3599 [DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
3600 [DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
3601 [DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
3602 [DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
3603 };
3604
3605 static const struct genl_ops devlink_nl_ops[] = {
3606 {
3607 .cmd = DEVLINK_CMD_GET,
3608 .doit = devlink_nl_cmd_get_doit,
3609 .dumpit = devlink_nl_cmd_get_dumpit,
3610 .policy = devlink_nl_policy,
3611 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3612 /* can be retrieved by unprivileged users */
3613 },
3614 {
3615 .cmd = DEVLINK_CMD_PORT_GET,
3616 .doit = devlink_nl_cmd_port_get_doit,
3617 .dumpit = devlink_nl_cmd_port_get_dumpit,
3618 .policy = devlink_nl_policy,
3619 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
3620 /* can be retrieved by unprivileged users */
3621 },
3622 {
3623 .cmd = DEVLINK_CMD_PORT_SET,
3624 .doit = devlink_nl_cmd_port_set_doit,
3625 .policy = devlink_nl_policy,
3626 .flags = GENL_ADMIN_PERM,
3627 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
3628 },
3629 {
3630 .cmd = DEVLINK_CMD_PORT_SPLIT,
3631 .doit = devlink_nl_cmd_port_split_doit,
3632 .policy = devlink_nl_policy,
3633 .flags = GENL_ADMIN_PERM,
3634 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3635 DEVLINK_NL_FLAG_NO_LOCK,
3636 },
3637 {
3638 .cmd = DEVLINK_CMD_PORT_UNSPLIT,
3639 .doit = devlink_nl_cmd_port_unsplit_doit,
3640 .policy = devlink_nl_policy,
3641 .flags = GENL_ADMIN_PERM,
3642 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3643 DEVLINK_NL_FLAG_NO_LOCK,
3644 },
3645 {
3646 .cmd = DEVLINK_CMD_SB_GET,
3647 .doit = devlink_nl_cmd_sb_get_doit,
3648 .dumpit = devlink_nl_cmd_sb_get_dumpit,
3649 .policy = devlink_nl_policy,
3650 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3651 DEVLINK_NL_FLAG_NEED_SB,
3652 /* can be retrieved by unprivileged users */
3653 },
3654 {
3655 .cmd = DEVLINK_CMD_SB_POOL_GET,
3656 .doit = devlink_nl_cmd_sb_pool_get_doit,
3657 .dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
3658 .policy = devlink_nl_policy,
3659 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3660 DEVLINK_NL_FLAG_NEED_SB,
3661 /* can be retrieved by unprivileged users */
3662 },
3663 {
3664 .cmd = DEVLINK_CMD_SB_POOL_SET,
3665 .doit = devlink_nl_cmd_sb_pool_set_doit,
3666 .policy = devlink_nl_policy,
3667 .flags = GENL_ADMIN_PERM,
3668 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3669 DEVLINK_NL_FLAG_NEED_SB,
3670 },
3671 {
3672 .cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
3673 .doit = devlink_nl_cmd_sb_port_pool_get_doit,
3674 .dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
3675 .policy = devlink_nl_policy,
3676 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
3677 DEVLINK_NL_FLAG_NEED_SB,
3678 /* can be retrieved by unprivileged users */
3679 },
3680 {
3681 .cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
3682 .doit = devlink_nl_cmd_sb_port_pool_set_doit,
3683 .policy = devlink_nl_policy,
3684 .flags = GENL_ADMIN_PERM,
3685 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
3686 DEVLINK_NL_FLAG_NEED_SB,
3687 },
3688 {
3689 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
3690 .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
3691 .dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
3692 .policy = devlink_nl_policy,
3693 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
3694 DEVLINK_NL_FLAG_NEED_SB,
3695 /* can be retrieved by unprivileged users */
3696 },
3697 {
3698 .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
3699 .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
3700 .policy = devlink_nl_policy,
3701 .flags = GENL_ADMIN_PERM,
3702 .internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
3703 DEVLINK_NL_FLAG_NEED_SB,
3704 },
3705 {
3706 .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
3707 .doit = devlink_nl_cmd_sb_occ_snapshot_doit,
3708 .policy = devlink_nl_policy,
3709 .flags = GENL_ADMIN_PERM,
3710 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3711 DEVLINK_NL_FLAG_NEED_SB,
3712 },
3713 {
3714 .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
3715 .doit = devlink_nl_cmd_sb_occ_max_clear_doit,
3716 .policy = devlink_nl_policy,
3717 .flags = GENL_ADMIN_PERM,
3718 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3719 DEVLINK_NL_FLAG_NEED_SB,
3720 },
3721 {
3722 .cmd = DEVLINK_CMD_ESWITCH_GET,
3723 .doit = devlink_nl_cmd_eswitch_get_doit,
3724 .policy = devlink_nl_policy,
3725 .flags = GENL_ADMIN_PERM,
3726 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3727 },
3728 {
3729 .cmd = DEVLINK_CMD_ESWITCH_SET,
3730 .doit = devlink_nl_cmd_eswitch_set_doit,
3731 .policy = devlink_nl_policy,
3732 .flags = GENL_ADMIN_PERM,
3733 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3734 DEVLINK_NL_FLAG_NO_LOCK,
3735 },
3736 {
3737 .cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
3738 .doit = devlink_nl_cmd_dpipe_table_get,
3739 .policy = devlink_nl_policy,
3740 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3741 /* can be retrieved by unprivileged users */
3742 },
3743 {
3744 .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
3745 .doit = devlink_nl_cmd_dpipe_entries_get,
3746 .policy = devlink_nl_policy,
3747 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3748 /* can be retrieved by unprivileged users */
3749 },
3750 {
3751 .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
3752 .doit = devlink_nl_cmd_dpipe_headers_get,
3753 .policy = devlink_nl_policy,
3754 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3755 /* can be retrieved by unprivileged users */
3756 },
3757 {
3758 .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
3759 .doit = devlink_nl_cmd_dpipe_table_counters_set,
3760 .policy = devlink_nl_policy,
3761 .flags = GENL_ADMIN_PERM,
3762 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3763 },
3764 {
3765 .cmd = DEVLINK_CMD_RESOURCE_SET,
3766 .doit = devlink_nl_cmd_resource_set,
3767 .policy = devlink_nl_policy,
3768 .flags = GENL_ADMIN_PERM,
3769 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3770 },
3771 {
3772 .cmd = DEVLINK_CMD_RESOURCE_DUMP,
3773 .doit = devlink_nl_cmd_resource_dump,
3774 .policy = devlink_nl_policy,
3775 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3776 /* can be retrieved by unprivileged users */
3777 },
3778 {
3779 .cmd = DEVLINK_CMD_RELOAD,
3780 .doit = devlink_nl_cmd_reload,
3781 .policy = devlink_nl_policy,
3782 .flags = GENL_ADMIN_PERM,
3783 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
3784 DEVLINK_NL_FLAG_NO_LOCK,
3785 },
3786 {
3787 .cmd = DEVLINK_CMD_PARAM_GET,
3788 .doit = devlink_nl_cmd_param_get_doit,
3789 .dumpit = devlink_nl_cmd_param_get_dumpit,
3790 .policy = devlink_nl_policy,
3791 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3792 /* can be retrieved by unprivileged users */
3793 },
3794 {
3795 .cmd = DEVLINK_CMD_PARAM_SET,
3796 .doit = devlink_nl_cmd_param_set_doit,
3797 .policy = devlink_nl_policy,
3798 .flags = GENL_ADMIN_PERM,
3799 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3800 },
3801 {
3802 .cmd = DEVLINK_CMD_REGION_GET,
3803 .doit = devlink_nl_cmd_region_get_doit,
3804 .dumpit = devlink_nl_cmd_region_get_dumpit,
3805 .policy = devlink_nl_policy,
3806 .flags = GENL_ADMIN_PERM,
3807 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3808 },
3809 {
3810 .cmd = DEVLINK_CMD_REGION_DEL,
3811 .doit = devlink_nl_cmd_region_del,
3812 .policy = devlink_nl_policy,
3813 .flags = GENL_ADMIN_PERM,
3814 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3815 },
3816 {
3817 .cmd = DEVLINK_CMD_REGION_READ,
3818 .dumpit = devlink_nl_cmd_region_read_dumpit,
3819 .policy = devlink_nl_policy,
3820 .flags = GENL_ADMIN_PERM,
3821 .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
3822 },
3823 };
3824
3825 static struct genl_family devlink_nl_family __ro_after_init = {
3826 .name = DEVLINK_GENL_NAME,
3827 .version = DEVLINK_GENL_VERSION,
3828 .maxattr = DEVLINK_ATTR_MAX,
3829 .netnsok = true,
3830 .pre_doit = devlink_nl_pre_doit,
3831 .post_doit = devlink_nl_post_doit,
3832 .module = THIS_MODULE,
3833 .ops = devlink_nl_ops,
3834 .n_ops = ARRAY_SIZE(devlink_nl_ops),
3835 .mcgrps = devlink_nl_mcgrps,
3836 .n_mcgrps = ARRAY_SIZE(devlink_nl_mcgrps),
3837 };
3838
3839 /**
3840 * devlink_alloc - Allocate new devlink instance resources
3841 *
3842 * @ops: ops
3843 * @priv_size: size of user private data
3844 *
3845 * Allocate new devlink instance resources, including devlink index
3846 * and name.
3847 */
devlink_alloc(const struct devlink_ops * ops,size_t priv_size)3848 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
3849 {
3850 struct devlink *devlink;
3851
3852 devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
3853 if (!devlink)
3854 return NULL;
3855 devlink->ops = ops;
3856 devlink_net_set(devlink, &init_net);
3857 INIT_LIST_HEAD(&devlink->port_list);
3858 INIT_LIST_HEAD(&devlink->sb_list);
3859 INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
3860 INIT_LIST_HEAD(&devlink->resource_list);
3861 INIT_LIST_HEAD(&devlink->param_list);
3862 INIT_LIST_HEAD(&devlink->region_list);
3863 mutex_init(&devlink->lock);
3864 return devlink;
3865 }
3866 EXPORT_SYMBOL_GPL(devlink_alloc);
3867
3868 /**
3869 * devlink_register - Register devlink instance
3870 *
3871 * @devlink: devlink
3872 */
devlink_register(struct devlink * devlink,struct device * dev)3873 int devlink_register(struct devlink *devlink, struct device *dev)
3874 {
3875 mutex_lock(&devlink_mutex);
3876 devlink->dev = dev;
3877 list_add_tail(&devlink->list, &devlink_list);
3878 devlink_notify(devlink, DEVLINK_CMD_NEW);
3879 mutex_unlock(&devlink_mutex);
3880 return 0;
3881 }
3882 EXPORT_SYMBOL_GPL(devlink_register);
3883
3884 /**
3885 * devlink_unregister - Unregister devlink instance
3886 *
3887 * @devlink: devlink
3888 */
devlink_unregister(struct devlink * devlink)3889 void devlink_unregister(struct devlink *devlink)
3890 {
3891 mutex_lock(&devlink_mutex);
3892 devlink_notify(devlink, DEVLINK_CMD_DEL);
3893 list_del(&devlink->list);
3894 mutex_unlock(&devlink_mutex);
3895 }
3896 EXPORT_SYMBOL_GPL(devlink_unregister);
3897
3898 /**
3899 * devlink_free - Free devlink instance resources
3900 *
3901 * @devlink: devlink
3902 */
devlink_free(struct devlink * devlink)3903 void devlink_free(struct devlink *devlink)
3904 {
3905 kfree(devlink);
3906 }
3907 EXPORT_SYMBOL_GPL(devlink_free);
3908
3909 /**
3910 * devlink_port_register - Register devlink port
3911 *
3912 * @devlink: devlink
3913 * @devlink_port: devlink port
3914 * @port_index
3915 *
3916 * Register devlink port with provided port index. User can use
3917 * any indexing, even hw-related one. devlink_port structure
3918 * is convenient to be embedded inside user driver private structure.
3919 * Note that the caller should take care of zeroing the devlink_port
3920 * structure.
3921 */
devlink_port_register(struct devlink * devlink,struct devlink_port * devlink_port,unsigned int port_index)3922 int devlink_port_register(struct devlink *devlink,
3923 struct devlink_port *devlink_port,
3924 unsigned int port_index)
3925 {
3926 mutex_lock(&devlink->lock);
3927 if (devlink_port_index_exists(devlink, port_index)) {
3928 mutex_unlock(&devlink->lock);
3929 return -EEXIST;
3930 }
3931 devlink_port->devlink = devlink;
3932 devlink_port->index = port_index;
3933 devlink_port->registered = true;
3934 list_add_tail(&devlink_port->list, &devlink->port_list);
3935 mutex_unlock(&devlink->lock);
3936 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
3937 return 0;
3938 }
3939 EXPORT_SYMBOL_GPL(devlink_port_register);
3940
3941 /**
3942 * devlink_port_unregister - Unregister devlink port
3943 *
3944 * @devlink_port: devlink port
3945 */
devlink_port_unregister(struct devlink_port * devlink_port)3946 void devlink_port_unregister(struct devlink_port *devlink_port)
3947 {
3948 struct devlink *devlink = devlink_port->devlink;
3949
3950 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
3951 mutex_lock(&devlink->lock);
3952 list_del(&devlink_port->list);
3953 mutex_unlock(&devlink->lock);
3954 }
3955 EXPORT_SYMBOL_GPL(devlink_port_unregister);
3956
__devlink_port_type_set(struct devlink_port * devlink_port,enum devlink_port_type type,void * type_dev)3957 static void __devlink_port_type_set(struct devlink_port *devlink_port,
3958 enum devlink_port_type type,
3959 void *type_dev)
3960 {
3961 devlink_port->type = type;
3962 devlink_port->type_dev = type_dev;
3963 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
3964 }
3965
3966 /**
3967 * devlink_port_type_eth_set - Set port type to Ethernet
3968 *
3969 * @devlink_port: devlink port
3970 * @netdev: related netdevice
3971 */
devlink_port_type_eth_set(struct devlink_port * devlink_port,struct net_device * netdev)3972 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
3973 struct net_device *netdev)
3974 {
3975 return __devlink_port_type_set(devlink_port,
3976 DEVLINK_PORT_TYPE_ETH, netdev);
3977 }
3978 EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
3979
3980 /**
3981 * devlink_port_type_ib_set - Set port type to InfiniBand
3982 *
3983 * @devlink_port: devlink port
3984 * @ibdev: related IB device
3985 */
devlink_port_type_ib_set(struct devlink_port * devlink_port,struct ib_device * ibdev)3986 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
3987 struct ib_device *ibdev)
3988 {
3989 return __devlink_port_type_set(devlink_port,
3990 DEVLINK_PORT_TYPE_IB, ibdev);
3991 }
3992 EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
3993
3994 /**
3995 * devlink_port_type_clear - Clear port type
3996 *
3997 * @devlink_port: devlink port
3998 */
devlink_port_type_clear(struct devlink_port * devlink_port)3999 void devlink_port_type_clear(struct devlink_port *devlink_port)
4000 {
4001 return __devlink_port_type_set(devlink_port,
4002 DEVLINK_PORT_TYPE_NOTSET, NULL);
4003 }
4004 EXPORT_SYMBOL_GPL(devlink_port_type_clear);
4005
4006 /**
4007 * devlink_port_attrs_set - Set port attributes
4008 *
4009 * @devlink_port: devlink port
4010 * @flavour: flavour of the port
4011 * @port_number: number of the port that is facing user, for example
4012 * the front panel port number
4013 * @split: indicates if this is split port
4014 * @split_subport_number: if the port is split, this is the number
4015 * of subport.
4016 */
devlink_port_attrs_set(struct devlink_port * devlink_port,enum devlink_port_flavour flavour,u32 port_number,bool split,u32 split_subport_number)4017 void devlink_port_attrs_set(struct devlink_port *devlink_port,
4018 enum devlink_port_flavour flavour,
4019 u32 port_number, bool split,
4020 u32 split_subport_number)
4021 {
4022 struct devlink_port_attrs *attrs = &devlink_port->attrs;
4023
4024 attrs->set = true;
4025 attrs->flavour = flavour;
4026 attrs->port_number = port_number;
4027 attrs->split = split;
4028 attrs->split_subport_number = split_subport_number;
4029 devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
4030 }
4031 EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
4032
devlink_port_get_phys_port_name(struct devlink_port * devlink_port,char * name,size_t len)4033 int devlink_port_get_phys_port_name(struct devlink_port *devlink_port,
4034 char *name, size_t len)
4035 {
4036 struct devlink_port_attrs *attrs = &devlink_port->attrs;
4037 int n = 0;
4038
4039 if (!attrs->set)
4040 return -EOPNOTSUPP;
4041
4042 switch (attrs->flavour) {
4043 case DEVLINK_PORT_FLAVOUR_PHYSICAL:
4044 if (!attrs->split)
4045 n = snprintf(name, len, "p%u", attrs->port_number);
4046 else
4047 n = snprintf(name, len, "p%us%u", attrs->port_number,
4048 attrs->split_subport_number);
4049 break;
4050 case DEVLINK_PORT_FLAVOUR_CPU:
4051 case DEVLINK_PORT_FLAVOUR_DSA:
4052 /* As CPU and DSA ports do not have a netdevice associated
4053 * case should not ever happen.
4054 */
4055 WARN_ON(1);
4056 return -EINVAL;
4057 }
4058
4059 if (n >= len)
4060 return -EINVAL;
4061
4062 return 0;
4063 }
4064 EXPORT_SYMBOL_GPL(devlink_port_get_phys_port_name);
4065
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)4066 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
4067 u32 size, u16 ingress_pools_count,
4068 u16 egress_pools_count, u16 ingress_tc_count,
4069 u16 egress_tc_count)
4070 {
4071 struct devlink_sb *devlink_sb;
4072 int err = 0;
4073
4074 mutex_lock(&devlink->lock);
4075 if (devlink_sb_index_exists(devlink, sb_index)) {
4076 err = -EEXIST;
4077 goto unlock;
4078 }
4079
4080 devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
4081 if (!devlink_sb) {
4082 err = -ENOMEM;
4083 goto unlock;
4084 }
4085 devlink_sb->index = sb_index;
4086 devlink_sb->size = size;
4087 devlink_sb->ingress_pools_count = ingress_pools_count;
4088 devlink_sb->egress_pools_count = egress_pools_count;
4089 devlink_sb->ingress_tc_count = ingress_tc_count;
4090 devlink_sb->egress_tc_count = egress_tc_count;
4091 list_add_tail(&devlink_sb->list, &devlink->sb_list);
4092 unlock:
4093 mutex_unlock(&devlink->lock);
4094 return err;
4095 }
4096 EXPORT_SYMBOL_GPL(devlink_sb_register);
4097
devlink_sb_unregister(struct devlink * devlink,unsigned int sb_index)4098 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
4099 {
4100 struct devlink_sb *devlink_sb;
4101
4102 mutex_lock(&devlink->lock);
4103 devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
4104 WARN_ON(!devlink_sb);
4105 list_del(&devlink_sb->list);
4106 mutex_unlock(&devlink->lock);
4107 kfree(devlink_sb);
4108 }
4109 EXPORT_SYMBOL_GPL(devlink_sb_unregister);
4110
4111 /**
4112 * devlink_dpipe_headers_register - register dpipe headers
4113 *
4114 * @devlink: devlink
4115 * @dpipe_headers: dpipe header array
4116 *
4117 * Register the headers supported by hardware.
4118 */
devlink_dpipe_headers_register(struct devlink * devlink,struct devlink_dpipe_headers * dpipe_headers)4119 int devlink_dpipe_headers_register(struct devlink *devlink,
4120 struct devlink_dpipe_headers *dpipe_headers)
4121 {
4122 mutex_lock(&devlink->lock);
4123 devlink->dpipe_headers = dpipe_headers;
4124 mutex_unlock(&devlink->lock);
4125 return 0;
4126 }
4127 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
4128
4129 /**
4130 * devlink_dpipe_headers_unregister - unregister dpipe headers
4131 *
4132 * @devlink: devlink
4133 *
4134 * Unregister the headers supported by hardware.
4135 */
devlink_dpipe_headers_unregister(struct devlink * devlink)4136 void devlink_dpipe_headers_unregister(struct devlink *devlink)
4137 {
4138 mutex_lock(&devlink->lock);
4139 devlink->dpipe_headers = NULL;
4140 mutex_unlock(&devlink->lock);
4141 }
4142 EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
4143
4144 /**
4145 * devlink_dpipe_table_counter_enabled - check if counter allocation
4146 * required
4147 * @devlink: devlink
4148 * @table_name: tables name
4149 *
4150 * Used by driver to check if counter allocation is required.
4151 * After counter allocation is turned on the table entries
4152 * are updated to include counter statistics.
4153 *
4154 * After that point on the driver must respect the counter
4155 * state so that each entry added to the table is added
4156 * with a counter.
4157 */
devlink_dpipe_table_counter_enabled(struct devlink * devlink,const char * table_name)4158 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
4159 const char *table_name)
4160 {
4161 struct devlink_dpipe_table *table;
4162 bool enabled;
4163
4164 rcu_read_lock();
4165 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
4166 table_name);
4167 enabled = false;
4168 if (table)
4169 enabled = table->counters_enabled;
4170 rcu_read_unlock();
4171 return enabled;
4172 }
4173 EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
4174
4175 /**
4176 * devlink_dpipe_table_register - register dpipe table
4177 *
4178 * @devlink: devlink
4179 * @table_name: table name
4180 * @table_ops: table ops
4181 * @priv: priv
4182 * @counter_control_extern: external control for counters
4183 */
devlink_dpipe_table_register(struct devlink * devlink,const char * table_name,struct devlink_dpipe_table_ops * table_ops,void * priv,bool counter_control_extern)4184 int devlink_dpipe_table_register(struct devlink *devlink,
4185 const char *table_name,
4186 struct devlink_dpipe_table_ops *table_ops,
4187 void *priv, bool counter_control_extern)
4188 {
4189 struct devlink_dpipe_table *table;
4190
4191 if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name))
4192 return -EEXIST;
4193
4194 if (WARN_ON(!table_ops->size_get))
4195 return -EINVAL;
4196
4197 table = kzalloc(sizeof(*table), GFP_KERNEL);
4198 if (!table)
4199 return -ENOMEM;
4200
4201 table->name = table_name;
4202 table->table_ops = table_ops;
4203 table->priv = priv;
4204 table->counter_control_extern = counter_control_extern;
4205
4206 mutex_lock(&devlink->lock);
4207 list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
4208 mutex_unlock(&devlink->lock);
4209 return 0;
4210 }
4211 EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
4212
4213 /**
4214 * devlink_dpipe_table_unregister - unregister dpipe table
4215 *
4216 * @devlink: devlink
4217 * @table_name: table name
4218 */
devlink_dpipe_table_unregister(struct devlink * devlink,const char * table_name)4219 void devlink_dpipe_table_unregister(struct devlink *devlink,
4220 const char *table_name)
4221 {
4222 struct devlink_dpipe_table *table;
4223
4224 mutex_lock(&devlink->lock);
4225 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
4226 table_name);
4227 if (!table)
4228 goto unlock;
4229 list_del_rcu(&table->list);
4230 mutex_unlock(&devlink->lock);
4231 kfree_rcu(table, rcu);
4232 return;
4233 unlock:
4234 mutex_unlock(&devlink->lock);
4235 }
4236 EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
4237
4238 /**
4239 * devlink_resource_register - devlink resource register
4240 *
4241 * @devlink: devlink
4242 * @resource_name: resource's name
4243 * @top_hierarchy: top hierarchy
4244 * @reload_required: reload is required for new configuration to
4245 * apply
4246 * @resource_size: resource's size
4247 * @resource_id: resource's id
4248 * @parent_reosurce_id: resource's parent id
4249 * @size params: size parameters
4250 */
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)4251 int devlink_resource_register(struct devlink *devlink,
4252 const char *resource_name,
4253 u64 resource_size,
4254 u64 resource_id,
4255 u64 parent_resource_id,
4256 const struct devlink_resource_size_params *size_params)
4257 {
4258 struct devlink_resource *resource;
4259 struct list_head *resource_list;
4260 bool top_hierarchy;
4261 int err = 0;
4262
4263 top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
4264
4265 mutex_lock(&devlink->lock);
4266 resource = devlink_resource_find(devlink, NULL, resource_id);
4267 if (resource) {
4268 err = -EINVAL;
4269 goto out;
4270 }
4271
4272 resource = kzalloc(sizeof(*resource), GFP_KERNEL);
4273 if (!resource) {
4274 err = -ENOMEM;
4275 goto out;
4276 }
4277
4278 if (top_hierarchy) {
4279 resource_list = &devlink->resource_list;
4280 } else {
4281 struct devlink_resource *parent_resource;
4282
4283 parent_resource = devlink_resource_find(devlink, NULL,
4284 parent_resource_id);
4285 if (parent_resource) {
4286 resource_list = &parent_resource->resource_list;
4287 resource->parent = parent_resource;
4288 } else {
4289 kfree(resource);
4290 err = -EINVAL;
4291 goto out;
4292 }
4293 }
4294
4295 resource->name = resource_name;
4296 resource->size = resource_size;
4297 resource->size_new = resource_size;
4298 resource->id = resource_id;
4299 resource->size_valid = true;
4300 memcpy(&resource->size_params, size_params,
4301 sizeof(resource->size_params));
4302 INIT_LIST_HEAD(&resource->resource_list);
4303 list_add_tail(&resource->list, resource_list);
4304 out:
4305 mutex_unlock(&devlink->lock);
4306 return err;
4307 }
4308 EXPORT_SYMBOL_GPL(devlink_resource_register);
4309
4310 /**
4311 * devlink_resources_unregister - free all resources
4312 *
4313 * @devlink: devlink
4314 * @resource: resource
4315 */
devlink_resources_unregister(struct devlink * devlink,struct devlink_resource * resource)4316 void devlink_resources_unregister(struct devlink *devlink,
4317 struct devlink_resource *resource)
4318 {
4319 struct devlink_resource *tmp, *child_resource;
4320 struct list_head *resource_list;
4321
4322 if (resource)
4323 resource_list = &resource->resource_list;
4324 else
4325 resource_list = &devlink->resource_list;
4326
4327 if (!resource)
4328 mutex_lock(&devlink->lock);
4329
4330 list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
4331 devlink_resources_unregister(devlink, child_resource);
4332 list_del(&child_resource->list);
4333 kfree(child_resource);
4334 }
4335
4336 if (!resource)
4337 mutex_unlock(&devlink->lock);
4338 }
4339 EXPORT_SYMBOL_GPL(devlink_resources_unregister);
4340
4341 /**
4342 * devlink_resource_size_get - get and update size
4343 *
4344 * @devlink: devlink
4345 * @resource_id: the requested resource id
4346 * @p_resource_size: ptr to update
4347 */
devlink_resource_size_get(struct devlink * devlink,u64 resource_id,u64 * p_resource_size)4348 int devlink_resource_size_get(struct devlink *devlink,
4349 u64 resource_id,
4350 u64 *p_resource_size)
4351 {
4352 struct devlink_resource *resource;
4353 int err = 0;
4354
4355 mutex_lock(&devlink->lock);
4356 resource = devlink_resource_find(devlink, NULL, resource_id);
4357 if (!resource) {
4358 err = -EINVAL;
4359 goto out;
4360 }
4361 *p_resource_size = resource->size_new;
4362 resource->size = resource->size_new;
4363 out:
4364 mutex_unlock(&devlink->lock);
4365 return err;
4366 }
4367 EXPORT_SYMBOL_GPL(devlink_resource_size_get);
4368
4369 /**
4370 * devlink_dpipe_table_resource_set - set the resource id
4371 *
4372 * @devlink: devlink
4373 * @table_name: table name
4374 * @resource_id: resource id
4375 * @resource_units: number of resource's units consumed per table's entry
4376 */
devlink_dpipe_table_resource_set(struct devlink * devlink,const char * table_name,u64 resource_id,u64 resource_units)4377 int devlink_dpipe_table_resource_set(struct devlink *devlink,
4378 const char *table_name, u64 resource_id,
4379 u64 resource_units)
4380 {
4381 struct devlink_dpipe_table *table;
4382 int err = 0;
4383
4384 mutex_lock(&devlink->lock);
4385 table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
4386 table_name);
4387 if (!table) {
4388 err = -EINVAL;
4389 goto out;
4390 }
4391 table->resource_id = resource_id;
4392 table->resource_units = resource_units;
4393 table->resource_valid = true;
4394 out:
4395 mutex_unlock(&devlink->lock);
4396 return err;
4397 }
4398 EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
4399
4400 /**
4401 * devlink_resource_occ_get_register - register occupancy getter
4402 *
4403 * @devlink: devlink
4404 * @resource_id: resource id
4405 * @occ_get: occupancy getter callback
4406 * @occ_get_priv: occupancy getter callback priv
4407 */
devlink_resource_occ_get_register(struct devlink * devlink,u64 resource_id,devlink_resource_occ_get_t * occ_get,void * occ_get_priv)4408 void devlink_resource_occ_get_register(struct devlink *devlink,
4409 u64 resource_id,
4410 devlink_resource_occ_get_t *occ_get,
4411 void *occ_get_priv)
4412 {
4413 struct devlink_resource *resource;
4414
4415 mutex_lock(&devlink->lock);
4416 resource = devlink_resource_find(devlink, NULL, resource_id);
4417 if (WARN_ON(!resource))
4418 goto out;
4419 WARN_ON(resource->occ_get);
4420
4421 resource->occ_get = occ_get;
4422 resource->occ_get_priv = occ_get_priv;
4423 out:
4424 mutex_unlock(&devlink->lock);
4425 }
4426 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
4427
4428 /**
4429 * devlink_resource_occ_get_unregister - unregister occupancy getter
4430 *
4431 * @devlink: devlink
4432 * @resource_id: resource id
4433 */
devlink_resource_occ_get_unregister(struct devlink * devlink,u64 resource_id)4434 void devlink_resource_occ_get_unregister(struct devlink *devlink,
4435 u64 resource_id)
4436 {
4437 struct devlink_resource *resource;
4438
4439 mutex_lock(&devlink->lock);
4440 resource = devlink_resource_find(devlink, NULL, resource_id);
4441 if (WARN_ON(!resource))
4442 goto out;
4443 WARN_ON(!resource->occ_get);
4444
4445 resource->occ_get = NULL;
4446 resource->occ_get_priv = NULL;
4447 out:
4448 mutex_unlock(&devlink->lock);
4449 }
4450 EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
4451
4452 /**
4453 * devlink_params_register - register configuration parameters
4454 *
4455 * @devlink: devlink
4456 * @params: configuration parameters array
4457 * @params_count: number of parameters provided
4458 *
4459 * Register the configuration parameters supported by the driver.
4460 */
devlink_params_register(struct devlink * devlink,const struct devlink_param * params,size_t params_count)4461 int devlink_params_register(struct devlink *devlink,
4462 const struct devlink_param *params,
4463 size_t params_count)
4464 {
4465 const struct devlink_param *param = params;
4466 int i;
4467 int err;
4468
4469 mutex_lock(&devlink->lock);
4470 for (i = 0; i < params_count; i++, param++) {
4471 if (!param || !param->name || !param->supported_cmodes) {
4472 err = -EINVAL;
4473 goto rollback;
4474 }
4475 if (param->generic) {
4476 err = devlink_param_generic_verify(param);
4477 if (err)
4478 goto rollback;
4479 } else {
4480 err = devlink_param_driver_verify(param);
4481 if (err)
4482 goto rollback;
4483 }
4484 err = devlink_param_register_one(devlink, param);
4485 if (err)
4486 goto rollback;
4487 }
4488
4489 mutex_unlock(&devlink->lock);
4490 return 0;
4491
4492 rollback:
4493 if (!i)
4494 goto unlock;
4495 for (param--; i > 0; i--, param--)
4496 devlink_param_unregister_one(devlink, param);
4497 unlock:
4498 mutex_unlock(&devlink->lock);
4499 return err;
4500 }
4501 EXPORT_SYMBOL_GPL(devlink_params_register);
4502
4503 /**
4504 * devlink_params_unregister - unregister configuration parameters
4505 * @devlink: devlink
4506 * @params: configuration parameters to unregister
4507 * @params_count: number of parameters provided
4508 */
devlink_params_unregister(struct devlink * devlink,const struct devlink_param * params,size_t params_count)4509 void devlink_params_unregister(struct devlink *devlink,
4510 const struct devlink_param *params,
4511 size_t params_count)
4512 {
4513 const struct devlink_param *param = params;
4514 int i;
4515
4516 mutex_lock(&devlink->lock);
4517 for (i = 0; i < params_count; i++, param++)
4518 devlink_param_unregister_one(devlink, param);
4519 mutex_unlock(&devlink->lock);
4520 }
4521 EXPORT_SYMBOL_GPL(devlink_params_unregister);
4522
4523 /**
4524 * devlink_param_driverinit_value_get - get configuration parameter
4525 * value for driver initializing
4526 *
4527 * @devlink: devlink
4528 * @param_id: parameter ID
4529 * @init_val: value of parameter in driverinit configuration mode
4530 *
4531 * This function should be used by the driver to get driverinit
4532 * configuration for initialization after reload command.
4533 */
devlink_param_driverinit_value_get(struct devlink * devlink,u32 param_id,union devlink_param_value * init_val)4534 int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
4535 union devlink_param_value *init_val)
4536 {
4537 struct devlink_param_item *param_item;
4538
4539 if (!devlink->ops || !devlink->ops->reload)
4540 return -EOPNOTSUPP;
4541
4542 param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
4543 if (!param_item)
4544 return -EINVAL;
4545
4546 if (!param_item->driverinit_value_valid ||
4547 !devlink_param_cmode_is_supported(param_item->param,
4548 DEVLINK_PARAM_CMODE_DRIVERINIT))
4549 return -EOPNOTSUPP;
4550
4551 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
4552 strcpy(init_val->vstr, param_item->driverinit_value.vstr);
4553 else
4554 *init_val = param_item->driverinit_value;
4555
4556 return 0;
4557 }
4558 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
4559
4560 /**
4561 * devlink_param_driverinit_value_set - set value of configuration
4562 * parameter for driverinit
4563 * configuration mode
4564 *
4565 * @devlink: devlink
4566 * @param_id: parameter ID
4567 * @init_val: value of parameter to set for driverinit configuration mode
4568 *
4569 * This function should be used by the driver to set driverinit
4570 * configuration mode default value.
4571 */
devlink_param_driverinit_value_set(struct devlink * devlink,u32 param_id,union devlink_param_value init_val)4572 int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
4573 union devlink_param_value init_val)
4574 {
4575 struct devlink_param_item *param_item;
4576
4577 param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
4578 if (!param_item)
4579 return -EINVAL;
4580
4581 if (!devlink_param_cmode_is_supported(param_item->param,
4582 DEVLINK_PARAM_CMODE_DRIVERINIT))
4583 return -EOPNOTSUPP;
4584
4585 if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
4586 strcpy(param_item->driverinit_value.vstr, init_val.vstr);
4587 else
4588 param_item->driverinit_value = init_val;
4589 param_item->driverinit_value_valid = true;
4590
4591 devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
4592 return 0;
4593 }
4594 EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
4595
4596 /**
4597 * devlink_param_value_changed - notify devlink on a parameter's value
4598 * change. Should be called by the driver
4599 * right after the change.
4600 *
4601 * @devlink: devlink
4602 * @param_id: parameter ID
4603 *
4604 * This function should be used by the driver to notify devlink on value
4605 * change, excluding driverinit configuration mode.
4606 * For driverinit configuration mode driver should use the function
4607 * devlink_param_driverinit_value_set() instead.
4608 */
devlink_param_value_changed(struct devlink * devlink,u32 param_id)4609 void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
4610 {
4611 struct devlink_param_item *param_item;
4612
4613 param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
4614 WARN_ON(!param_item);
4615
4616 devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
4617 }
4618 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
4619
4620 /**
4621 * devlink_param_value_str_fill - Safely fill-up the string preventing
4622 * from overflow of the preallocated buffer
4623 *
4624 * @dst_val: destination devlink_param_value
4625 * @src: source buffer
4626 */
devlink_param_value_str_fill(union devlink_param_value * dst_val,const char * src)4627 void devlink_param_value_str_fill(union devlink_param_value *dst_val,
4628 const char *src)
4629 {
4630 size_t len;
4631
4632 len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
4633 WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
4634 }
4635 EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
4636
4637 /**
4638 * devlink_region_create - create a new address region
4639 *
4640 * @devlink: devlink
4641 * @region_name: region name
4642 * @region_max_snapshots: Maximum supported number of snapshots for region
4643 * @region_size: size of region
4644 */
devlink_region_create(struct devlink * devlink,const char * region_name,u32 region_max_snapshots,u64 region_size)4645 struct devlink_region *devlink_region_create(struct devlink *devlink,
4646 const char *region_name,
4647 u32 region_max_snapshots,
4648 u64 region_size)
4649 {
4650 struct devlink_region *region;
4651 int err = 0;
4652
4653 mutex_lock(&devlink->lock);
4654
4655 if (devlink_region_get_by_name(devlink, region_name)) {
4656 err = -EEXIST;
4657 goto unlock;
4658 }
4659
4660 region = kzalloc(sizeof(*region), GFP_KERNEL);
4661 if (!region) {
4662 err = -ENOMEM;
4663 goto unlock;
4664 }
4665
4666 region->devlink = devlink;
4667 region->max_snapshots = region_max_snapshots;
4668 region->name = region_name;
4669 region->size = region_size;
4670 INIT_LIST_HEAD(®ion->snapshot_list);
4671 list_add_tail(®ion->list, &devlink->region_list);
4672 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
4673
4674 mutex_unlock(&devlink->lock);
4675 return region;
4676
4677 unlock:
4678 mutex_unlock(&devlink->lock);
4679 return ERR_PTR(err);
4680 }
4681 EXPORT_SYMBOL_GPL(devlink_region_create);
4682
4683 /**
4684 * devlink_region_destroy - destroy address region
4685 *
4686 * @region: devlink region to destroy
4687 */
devlink_region_destroy(struct devlink_region * region)4688 void devlink_region_destroy(struct devlink_region *region)
4689 {
4690 struct devlink *devlink = region->devlink;
4691 struct devlink_snapshot *snapshot, *ts;
4692
4693 mutex_lock(&devlink->lock);
4694
4695 /* Free all snapshots of region */
4696 list_for_each_entry_safe(snapshot, ts, ®ion->snapshot_list, list)
4697 devlink_region_snapshot_del(snapshot);
4698
4699 list_del(®ion->list);
4700
4701 devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
4702 mutex_unlock(&devlink->lock);
4703 kfree(region);
4704 }
4705 EXPORT_SYMBOL_GPL(devlink_region_destroy);
4706
4707 /**
4708 * devlink_region_shapshot_id_get - get snapshot ID
4709 *
4710 * This callback should be called when adding a new snapshot,
4711 * Driver should use the same id for multiple snapshots taken
4712 * on multiple regions at the same time/by the same trigger.
4713 *
4714 * @devlink: devlink
4715 */
devlink_region_shapshot_id_get(struct devlink * devlink)4716 u32 devlink_region_shapshot_id_get(struct devlink *devlink)
4717 {
4718 u32 id;
4719
4720 mutex_lock(&devlink->lock);
4721 id = ++devlink->snapshot_id;
4722 mutex_unlock(&devlink->lock);
4723
4724 return id;
4725 }
4726 EXPORT_SYMBOL_GPL(devlink_region_shapshot_id_get);
4727
4728 /**
4729 * devlink_region_snapshot_create - create a new snapshot
4730 * This will add a new snapshot of a region. The snapshot
4731 * will be stored on the region struct and can be accessed
4732 * from devlink. This is useful for future analyses of snapshots.
4733 * Multiple snapshots can be created on a region.
4734 * The @snapshot_id should be obtained using the getter function.
4735 *
4736 * @devlink_region: devlink region of the snapshot
4737 * @data_len: size of snapshot data
4738 * @data: snapshot data
4739 * @snapshot_id: snapshot id to be created
4740 * @data_destructor: pointer to destructor function to free data
4741 */
devlink_region_snapshot_create(struct devlink_region * region,u64 data_len,u8 * data,u32 snapshot_id,devlink_snapshot_data_dest_t * data_destructor)4742 int devlink_region_snapshot_create(struct devlink_region *region, u64 data_len,
4743 u8 *data, u32 snapshot_id,
4744 devlink_snapshot_data_dest_t *data_destructor)
4745 {
4746 struct devlink *devlink = region->devlink;
4747 struct devlink_snapshot *snapshot;
4748 int err;
4749
4750 mutex_lock(&devlink->lock);
4751
4752 /* check if region can hold one more snapshot */
4753 if (region->cur_snapshots == region->max_snapshots) {
4754 err = -ENOMEM;
4755 goto unlock;
4756 }
4757
4758 if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
4759 err = -EEXIST;
4760 goto unlock;
4761 }
4762
4763 snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
4764 if (!snapshot) {
4765 err = -ENOMEM;
4766 goto unlock;
4767 }
4768
4769 snapshot->id = snapshot_id;
4770 snapshot->region = region;
4771 snapshot->data = data;
4772 snapshot->data_len = data_len;
4773 snapshot->data_destructor = data_destructor;
4774
4775 list_add_tail(&snapshot->list, ®ion->snapshot_list);
4776
4777 region->cur_snapshots++;
4778
4779 devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
4780 mutex_unlock(&devlink->lock);
4781 return 0;
4782
4783 unlock:
4784 mutex_unlock(&devlink->lock);
4785 return err;
4786 }
4787 EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
4788
devlink_module_init(void)4789 static int __init devlink_module_init(void)
4790 {
4791 return genl_register_family(&devlink_nl_family);
4792 }
4793
devlink_module_exit(void)4794 static void __exit devlink_module_exit(void)
4795 {
4796 genl_unregister_family(&devlink_nl_family);
4797 }
4798
4799 module_init(devlink_module_init);
4800 module_exit(devlink_module_exit);
4801
4802 MODULE_LICENSE("GPL v2");
4803 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
4804 MODULE_DESCRIPTION("Network physical device Netlink interface");
4805 MODULE_ALIAS_GENL_FAMILY(DEVLINK_GENL_NAME);
4806
