1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * net/core/ethtool.c - Ethtool ioctl handler
4 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
5 *
6 * This file is where we call all the ethtool_ops commands to get
7 * the information ethtool needs.
8 */
9
10 #include <linux/compat.h>
11 #include <linux/etherdevice.h>
12 #include <linux/module.h>
13 #include <linux/types.h>
14 #include <linux/capability.h>
15 #include <linux/errno.h>
16 #include <linux/ethtool.h>
17 #include <linux/netdevice.h>
18 #include <linux/net_tstamp.h>
19 #include <linux/phy.h>
20 #include <linux/bitops.h>
21 #include <linux/uaccess.h>
22 #include <linux/vmalloc.h>
23 #include <linux/sfp.h>
24 #include <linux/slab.h>
25 #include <linux/rtnetlink.h>
26 #include <linux/sched/signal.h>
27 #include <linux/net.h>
28 #include <linux/pm_runtime.h>
29 #include <net/devlink.h>
30 #include <net/xdp_sock_drv.h>
31 #include <net/flow_offload.h>
32 #include <linux/ethtool_netlink.h>
33 #include <generated/utsrelease.h>
34 #include "common.h"
35
36 /* State held across locks and calls for commands which have devlink fallback */
37 struct ethtool_devlink_compat {
38 struct devlink *devlink;
39 union {
40 struct ethtool_flash efl;
41 struct ethtool_drvinfo info;
42 };
43 };
44
netdev_to_devlink_get(struct net_device * dev)45 static struct devlink *netdev_to_devlink_get(struct net_device *dev)
46 {
47 struct devlink_port *devlink_port;
48
49 if (!dev->netdev_ops->ndo_get_devlink_port)
50 return NULL;
51
52 devlink_port = dev->netdev_ops->ndo_get_devlink_port(dev);
53 if (!devlink_port)
54 return NULL;
55
56 return devlink_try_get(devlink_port->devlink);
57 }
58
59 /*
60 * Some useful ethtool_ops methods that're device independent.
61 * If we find that all drivers want to do the same thing here,
62 * we can turn these into dev_() function calls.
63 */
64
ethtool_op_get_link(struct net_device * dev)65 u32 ethtool_op_get_link(struct net_device *dev)
66 {
67 return netif_carrier_ok(dev) ? 1 : 0;
68 }
69 EXPORT_SYMBOL(ethtool_op_get_link);
70
ethtool_op_get_ts_info(struct net_device * dev,struct ethtool_ts_info * info)71 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
72 {
73 info->so_timestamping =
74 SOF_TIMESTAMPING_TX_SOFTWARE |
75 SOF_TIMESTAMPING_RX_SOFTWARE |
76 SOF_TIMESTAMPING_SOFTWARE;
77 info->phc_index = -1;
78 return 0;
79 }
80 EXPORT_SYMBOL(ethtool_op_get_ts_info);
81
82 /* Handlers for each ethtool command */
83
ethtool_get_features(struct net_device * dev,void __user * useraddr)84 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
85 {
86 struct ethtool_gfeatures cmd = {
87 .cmd = ETHTOOL_GFEATURES,
88 .size = ETHTOOL_DEV_FEATURE_WORDS,
89 };
90 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
91 u32 __user *sizeaddr;
92 u32 copy_size;
93 int i;
94
95 /* in case feature bits run out again */
96 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
97
98 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
99 features[i].available = (u32)(dev->hw_features >> (32 * i));
100 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
101 features[i].active = (u32)(dev->features >> (32 * i));
102 features[i].never_changed =
103 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
104 }
105
106 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
107 if (get_user(copy_size, sizeaddr))
108 return -EFAULT;
109
110 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
111 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
112
113 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
114 return -EFAULT;
115 useraddr += sizeof(cmd);
116 if (copy_to_user(useraddr, features,
117 array_size(copy_size, sizeof(*features))))
118 return -EFAULT;
119
120 return 0;
121 }
122
ethtool_set_features(struct net_device * dev,void __user * useraddr)123 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
124 {
125 struct ethtool_sfeatures cmd;
126 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
127 netdev_features_t wanted = 0, valid = 0;
128 int i, ret = 0;
129
130 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
131 return -EFAULT;
132 useraddr += sizeof(cmd);
133
134 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
135 return -EINVAL;
136
137 if (copy_from_user(features, useraddr, sizeof(features)))
138 return -EFAULT;
139
140 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
141 valid |= (netdev_features_t)features[i].valid << (32 * i);
142 wanted |= (netdev_features_t)features[i].requested << (32 * i);
143 }
144
145 if (valid & ~NETIF_F_ETHTOOL_BITS)
146 return -EINVAL;
147
148 if (valid & ~dev->hw_features) {
149 valid &= dev->hw_features;
150 ret |= ETHTOOL_F_UNSUPPORTED;
151 }
152
153 dev->wanted_features &= ~valid;
154 dev->wanted_features |= wanted & valid;
155 __netdev_update_features(dev);
156
157 if ((dev->wanted_features ^ dev->features) & valid)
158 ret |= ETHTOOL_F_WISH;
159
160 return ret;
161 }
162
__ethtool_get_sset_count(struct net_device * dev,int sset)163 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
164 {
165 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
166 const struct ethtool_ops *ops = dev->ethtool_ops;
167
168 if (sset == ETH_SS_FEATURES)
169 return ARRAY_SIZE(netdev_features_strings);
170
171 if (sset == ETH_SS_RSS_HASH_FUNCS)
172 return ARRAY_SIZE(rss_hash_func_strings);
173
174 if (sset == ETH_SS_TUNABLES)
175 return ARRAY_SIZE(tunable_strings);
176
177 if (sset == ETH_SS_PHY_TUNABLES)
178 return ARRAY_SIZE(phy_tunable_strings);
179
180 if (sset == ETH_SS_PHY_STATS && dev->phydev &&
181 !ops->get_ethtool_phy_stats &&
182 phy_ops && phy_ops->get_sset_count)
183 return phy_ops->get_sset_count(dev->phydev);
184
185 if (sset == ETH_SS_LINK_MODES)
186 return __ETHTOOL_LINK_MODE_MASK_NBITS;
187
188 if (ops->get_sset_count && ops->get_strings)
189 return ops->get_sset_count(dev, sset);
190 else
191 return -EOPNOTSUPP;
192 }
193
__ethtool_get_strings(struct net_device * dev,u32 stringset,u8 * data)194 static void __ethtool_get_strings(struct net_device *dev,
195 u32 stringset, u8 *data)
196 {
197 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
198 const struct ethtool_ops *ops = dev->ethtool_ops;
199
200 if (stringset == ETH_SS_FEATURES)
201 memcpy(data, netdev_features_strings,
202 sizeof(netdev_features_strings));
203 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
204 memcpy(data, rss_hash_func_strings,
205 sizeof(rss_hash_func_strings));
206 else if (stringset == ETH_SS_TUNABLES)
207 memcpy(data, tunable_strings, sizeof(tunable_strings));
208 else if (stringset == ETH_SS_PHY_TUNABLES)
209 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
210 else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
211 !ops->get_ethtool_phy_stats && phy_ops &&
212 phy_ops->get_strings)
213 phy_ops->get_strings(dev->phydev, data);
214 else if (stringset == ETH_SS_LINK_MODES)
215 memcpy(data, link_mode_names,
216 __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
217 else
218 /* ops->get_strings is valid because checked earlier */
219 ops->get_strings(dev, stringset, data);
220 }
221
ethtool_get_feature_mask(u32 eth_cmd)222 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
223 {
224 /* feature masks of legacy discrete ethtool ops */
225
226 switch (eth_cmd) {
227 case ETHTOOL_GTXCSUM:
228 case ETHTOOL_STXCSUM:
229 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
230 NETIF_F_SCTP_CRC;
231 case ETHTOOL_GRXCSUM:
232 case ETHTOOL_SRXCSUM:
233 return NETIF_F_RXCSUM;
234 case ETHTOOL_GSG:
235 case ETHTOOL_SSG:
236 return NETIF_F_SG | NETIF_F_FRAGLIST;
237 case ETHTOOL_GTSO:
238 case ETHTOOL_STSO:
239 return NETIF_F_ALL_TSO;
240 case ETHTOOL_GGSO:
241 case ETHTOOL_SGSO:
242 return NETIF_F_GSO;
243 case ETHTOOL_GGRO:
244 case ETHTOOL_SGRO:
245 return NETIF_F_GRO;
246 default:
247 BUG();
248 }
249 }
250
ethtool_get_one_feature(struct net_device * dev,char __user * useraddr,u32 ethcmd)251 static int ethtool_get_one_feature(struct net_device *dev,
252 char __user *useraddr, u32 ethcmd)
253 {
254 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
255 struct ethtool_value edata = {
256 .cmd = ethcmd,
257 .data = !!(dev->features & mask),
258 };
259
260 if (copy_to_user(useraddr, &edata, sizeof(edata)))
261 return -EFAULT;
262 return 0;
263 }
264
ethtool_set_one_feature(struct net_device * dev,void __user * useraddr,u32 ethcmd)265 static int ethtool_set_one_feature(struct net_device *dev,
266 void __user *useraddr, u32 ethcmd)
267 {
268 struct ethtool_value edata;
269 netdev_features_t mask;
270
271 if (copy_from_user(&edata, useraddr, sizeof(edata)))
272 return -EFAULT;
273
274 mask = ethtool_get_feature_mask(ethcmd);
275 mask &= dev->hw_features;
276 if (!mask)
277 return -EOPNOTSUPP;
278
279 if (edata.data)
280 dev->wanted_features |= mask;
281 else
282 dev->wanted_features &= ~mask;
283
284 __netdev_update_features(dev);
285
286 return 0;
287 }
288
289 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
290 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
291 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
292 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
293 NETIF_F_RXHASH)
294
__ethtool_get_flags(struct net_device * dev)295 static u32 __ethtool_get_flags(struct net_device *dev)
296 {
297 u32 flags = 0;
298
299 if (dev->features & NETIF_F_LRO)
300 flags |= ETH_FLAG_LRO;
301 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
302 flags |= ETH_FLAG_RXVLAN;
303 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
304 flags |= ETH_FLAG_TXVLAN;
305 if (dev->features & NETIF_F_NTUPLE)
306 flags |= ETH_FLAG_NTUPLE;
307 if (dev->features & NETIF_F_RXHASH)
308 flags |= ETH_FLAG_RXHASH;
309
310 return flags;
311 }
312
__ethtool_set_flags(struct net_device * dev,u32 data)313 static int __ethtool_set_flags(struct net_device *dev, u32 data)
314 {
315 netdev_features_t features = 0, changed;
316
317 if (data & ~ETH_ALL_FLAGS)
318 return -EINVAL;
319
320 if (data & ETH_FLAG_LRO)
321 features |= NETIF_F_LRO;
322 if (data & ETH_FLAG_RXVLAN)
323 features |= NETIF_F_HW_VLAN_CTAG_RX;
324 if (data & ETH_FLAG_TXVLAN)
325 features |= NETIF_F_HW_VLAN_CTAG_TX;
326 if (data & ETH_FLAG_NTUPLE)
327 features |= NETIF_F_NTUPLE;
328 if (data & ETH_FLAG_RXHASH)
329 features |= NETIF_F_RXHASH;
330
331 /* allow changing only bits set in hw_features */
332 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
333 if (changed & ~dev->hw_features)
334 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
335
336 dev->wanted_features =
337 (dev->wanted_features & ~changed) | (features & changed);
338
339 __netdev_update_features(dev);
340
341 return 0;
342 }
343
344 /* Given two link masks, AND them together and save the result in dst. */
ethtool_intersect_link_masks(struct ethtool_link_ksettings * dst,struct ethtool_link_ksettings * src)345 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
346 struct ethtool_link_ksettings *src)
347 {
348 unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
349 unsigned int idx = 0;
350
351 for (; idx < size; idx++) {
352 dst->link_modes.supported[idx] &=
353 src->link_modes.supported[idx];
354 dst->link_modes.advertising[idx] &=
355 src->link_modes.advertising[idx];
356 }
357 }
358 EXPORT_SYMBOL(ethtool_intersect_link_masks);
359
ethtool_convert_legacy_u32_to_link_mode(unsigned long * dst,u32 legacy_u32)360 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
361 u32 legacy_u32)
362 {
363 linkmode_zero(dst);
364 dst[0] = legacy_u32;
365 }
366 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
367
368 /* return false if src had higher bits set. lower bits always updated. */
ethtool_convert_link_mode_to_legacy_u32(u32 * legacy_u32,const unsigned long * src)369 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
370 const unsigned long *src)
371 {
372 *legacy_u32 = src[0];
373 return find_next_bit(src, __ETHTOOL_LINK_MODE_MASK_NBITS, 32) ==
374 __ETHTOOL_LINK_MODE_MASK_NBITS;
375 }
376 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
377
378 /* return false if ksettings link modes had higher bits
379 * set. legacy_settings always updated (best effort)
380 */
381 static bool
convert_link_ksettings_to_legacy_settings(struct ethtool_cmd * legacy_settings,const struct ethtool_link_ksettings * link_ksettings)382 convert_link_ksettings_to_legacy_settings(
383 struct ethtool_cmd *legacy_settings,
384 const struct ethtool_link_ksettings *link_ksettings)
385 {
386 bool retval = true;
387
388 memset(legacy_settings, 0, sizeof(*legacy_settings));
389 /* this also clears the deprecated fields in legacy structure:
390 * __u8 transceiver;
391 * __u32 maxtxpkt;
392 * __u32 maxrxpkt;
393 */
394
395 retval &= ethtool_convert_link_mode_to_legacy_u32(
396 &legacy_settings->supported,
397 link_ksettings->link_modes.supported);
398 retval &= ethtool_convert_link_mode_to_legacy_u32(
399 &legacy_settings->advertising,
400 link_ksettings->link_modes.advertising);
401 retval &= ethtool_convert_link_mode_to_legacy_u32(
402 &legacy_settings->lp_advertising,
403 link_ksettings->link_modes.lp_advertising);
404 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
405 legacy_settings->duplex
406 = link_ksettings->base.duplex;
407 legacy_settings->port
408 = link_ksettings->base.port;
409 legacy_settings->phy_address
410 = link_ksettings->base.phy_address;
411 legacy_settings->autoneg
412 = link_ksettings->base.autoneg;
413 legacy_settings->mdio_support
414 = link_ksettings->base.mdio_support;
415 legacy_settings->eth_tp_mdix
416 = link_ksettings->base.eth_tp_mdix;
417 legacy_settings->eth_tp_mdix_ctrl
418 = link_ksettings->base.eth_tp_mdix_ctrl;
419 legacy_settings->transceiver
420 = link_ksettings->base.transceiver;
421 return retval;
422 }
423
424 /* number of 32-bit words to store the user's link mode bitmaps */
425 #define __ETHTOOL_LINK_MODE_MASK_NU32 \
426 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
427
428 /* layout of the struct passed from/to userland */
429 struct ethtool_link_usettings {
430 struct ethtool_link_settings base;
431 struct {
432 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
433 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
434 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
435 } link_modes;
436 };
437
438 /* Internal kernel helper to query a device ethtool_link_settings. */
__ethtool_get_link_ksettings(struct net_device * dev,struct ethtool_link_ksettings * link_ksettings)439 int __ethtool_get_link_ksettings(struct net_device *dev,
440 struct ethtool_link_ksettings *link_ksettings)
441 {
442 ASSERT_RTNL();
443
444 if (!dev->ethtool_ops->get_link_ksettings)
445 return -EOPNOTSUPP;
446
447 memset(link_ksettings, 0, sizeof(*link_ksettings));
448 return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
449 }
450 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
451
452 /* convert ethtool_link_usettings in user space to a kernel internal
453 * ethtool_link_ksettings. return 0 on success, errno on error.
454 */
load_link_ksettings_from_user(struct ethtool_link_ksettings * to,const void __user * from)455 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
456 const void __user *from)
457 {
458 struct ethtool_link_usettings link_usettings;
459
460 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
461 return -EFAULT;
462
463 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
464 bitmap_from_arr32(to->link_modes.supported,
465 link_usettings.link_modes.supported,
466 __ETHTOOL_LINK_MODE_MASK_NBITS);
467 bitmap_from_arr32(to->link_modes.advertising,
468 link_usettings.link_modes.advertising,
469 __ETHTOOL_LINK_MODE_MASK_NBITS);
470 bitmap_from_arr32(to->link_modes.lp_advertising,
471 link_usettings.link_modes.lp_advertising,
472 __ETHTOOL_LINK_MODE_MASK_NBITS);
473
474 return 0;
475 }
476
477 /* Check if the user is trying to change anything besides speed/duplex */
ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings * cmd)478 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
479 {
480 struct ethtool_link_settings base2 = {};
481
482 base2.speed = cmd->base.speed;
483 base2.port = PORT_OTHER;
484 base2.duplex = cmd->base.duplex;
485 base2.cmd = cmd->base.cmd;
486 base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
487
488 return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
489 bitmap_empty(cmd->link_modes.supported,
490 __ETHTOOL_LINK_MODE_MASK_NBITS) &&
491 bitmap_empty(cmd->link_modes.lp_advertising,
492 __ETHTOOL_LINK_MODE_MASK_NBITS);
493 }
494
495 /* convert a kernel internal ethtool_link_ksettings to
496 * ethtool_link_usettings in user space. return 0 on success, errno on
497 * error.
498 */
499 static int
store_link_ksettings_for_user(void __user * to,const struct ethtool_link_ksettings * from)500 store_link_ksettings_for_user(void __user *to,
501 const struct ethtool_link_ksettings *from)
502 {
503 struct ethtool_link_usettings link_usettings;
504
505 memcpy(&link_usettings, from, sizeof(link_usettings));
506 bitmap_to_arr32(link_usettings.link_modes.supported,
507 from->link_modes.supported,
508 __ETHTOOL_LINK_MODE_MASK_NBITS);
509 bitmap_to_arr32(link_usettings.link_modes.advertising,
510 from->link_modes.advertising,
511 __ETHTOOL_LINK_MODE_MASK_NBITS);
512 bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
513 from->link_modes.lp_advertising,
514 __ETHTOOL_LINK_MODE_MASK_NBITS);
515
516 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
517 return -EFAULT;
518
519 return 0;
520 }
521
522 /* Query device for its ethtool_link_settings. */
ethtool_get_link_ksettings(struct net_device * dev,void __user * useraddr)523 static int ethtool_get_link_ksettings(struct net_device *dev,
524 void __user *useraddr)
525 {
526 int err = 0;
527 struct ethtool_link_ksettings link_ksettings;
528
529 ASSERT_RTNL();
530 if (!dev->ethtool_ops->get_link_ksettings)
531 return -EOPNOTSUPP;
532
533 /* handle bitmap nbits handshake */
534 if (copy_from_user(&link_ksettings.base, useraddr,
535 sizeof(link_ksettings.base)))
536 return -EFAULT;
537
538 if (__ETHTOOL_LINK_MODE_MASK_NU32
539 != link_ksettings.base.link_mode_masks_nwords) {
540 /* wrong link mode nbits requested */
541 memset(&link_ksettings, 0, sizeof(link_ksettings));
542 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
543 /* send back number of words required as negative val */
544 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
545 "need too many bits for link modes!");
546 link_ksettings.base.link_mode_masks_nwords
547 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
548
549 /* copy the base fields back to user, not the link
550 * mode bitmaps
551 */
552 if (copy_to_user(useraddr, &link_ksettings.base,
553 sizeof(link_ksettings.base)))
554 return -EFAULT;
555
556 return 0;
557 }
558
559 /* handshake successful: user/kernel agree on
560 * link_mode_masks_nwords
561 */
562
563 memset(&link_ksettings, 0, sizeof(link_ksettings));
564 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
565 if (err < 0)
566 return err;
567
568 /* make sure we tell the right values to user */
569 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
570 link_ksettings.base.link_mode_masks_nwords
571 = __ETHTOOL_LINK_MODE_MASK_NU32;
572 link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
573 link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
574 link_ksettings.base.rate_matching = RATE_MATCH_NONE;
575
576 return store_link_ksettings_for_user(useraddr, &link_ksettings);
577 }
578
579 /* Update device ethtool_link_settings. */
ethtool_set_link_ksettings(struct net_device * dev,void __user * useraddr)580 static int ethtool_set_link_ksettings(struct net_device *dev,
581 void __user *useraddr)
582 {
583 int err;
584 struct ethtool_link_ksettings link_ksettings;
585
586 ASSERT_RTNL();
587
588 if (!dev->ethtool_ops->set_link_ksettings)
589 return -EOPNOTSUPP;
590
591 /* make sure nbits field has expected value */
592 if (copy_from_user(&link_ksettings.base, useraddr,
593 sizeof(link_ksettings.base)))
594 return -EFAULT;
595
596 if (__ETHTOOL_LINK_MODE_MASK_NU32
597 != link_ksettings.base.link_mode_masks_nwords)
598 return -EINVAL;
599
600 /* copy the whole structure, now that we know it has expected
601 * format
602 */
603 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
604 if (err)
605 return err;
606
607 /* re-check nwords field, just in case */
608 if (__ETHTOOL_LINK_MODE_MASK_NU32
609 != link_ksettings.base.link_mode_masks_nwords)
610 return -EINVAL;
611
612 if (link_ksettings.base.master_slave_cfg ||
613 link_ksettings.base.master_slave_state)
614 return -EINVAL;
615
616 err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
617 if (err >= 0) {
618 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
619 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
620 }
621 return err;
622 }
623
ethtool_virtdev_set_link_ksettings(struct net_device * dev,const struct ethtool_link_ksettings * cmd,u32 * dev_speed,u8 * dev_duplex)624 int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
625 const struct ethtool_link_ksettings *cmd,
626 u32 *dev_speed, u8 *dev_duplex)
627 {
628 u32 speed;
629 u8 duplex;
630
631 speed = cmd->base.speed;
632 duplex = cmd->base.duplex;
633 /* don't allow custom speed and duplex */
634 if (!ethtool_validate_speed(speed) ||
635 !ethtool_validate_duplex(duplex) ||
636 !ethtool_virtdev_validate_cmd(cmd))
637 return -EINVAL;
638 *dev_speed = speed;
639 *dev_duplex = duplex;
640
641 return 0;
642 }
643 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
644
645 /* Query device for its ethtool_cmd settings.
646 *
647 * Backward compatibility note: for compatibility with legacy ethtool, this is
648 * now implemented via get_link_ksettings. When driver reports higher link mode
649 * bits, a kernel warning is logged once (with name of 1st driver/device) to
650 * recommend user to upgrade ethtool, but the command is successful (only the
651 * lower link mode bits reported back to user). Deprecated fields from
652 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
653 */
ethtool_get_settings(struct net_device * dev,void __user * useraddr)654 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
655 {
656 struct ethtool_link_ksettings link_ksettings;
657 struct ethtool_cmd cmd;
658 int err;
659
660 ASSERT_RTNL();
661 if (!dev->ethtool_ops->get_link_ksettings)
662 return -EOPNOTSUPP;
663
664 memset(&link_ksettings, 0, sizeof(link_ksettings));
665 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
666 if (err < 0)
667 return err;
668 convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
669
670 /* send a sensible cmd tag back to user */
671 cmd.cmd = ETHTOOL_GSET;
672
673 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
674 return -EFAULT;
675
676 return 0;
677 }
678
679 /* Update device link settings with given ethtool_cmd.
680 *
681 * Backward compatibility note: for compatibility with legacy ethtool, this is
682 * now always implemented via set_link_settings. When user's request updates
683 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
684 * warning is logged once (with name of 1st driver/device) to recommend user to
685 * upgrade ethtool, and the request is rejected.
686 */
ethtool_set_settings(struct net_device * dev,void __user * useraddr)687 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
688 {
689 struct ethtool_link_ksettings link_ksettings;
690 struct ethtool_cmd cmd;
691 int ret;
692
693 ASSERT_RTNL();
694
695 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
696 return -EFAULT;
697 if (!dev->ethtool_ops->set_link_ksettings)
698 return -EOPNOTSUPP;
699
700 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
701 return -EINVAL;
702 link_ksettings.base.link_mode_masks_nwords =
703 __ETHTOOL_LINK_MODE_MASK_NU32;
704 ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
705 if (ret >= 0) {
706 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
707 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
708 }
709 return ret;
710 }
711
712 static int
ethtool_get_drvinfo(struct net_device * dev,struct ethtool_devlink_compat * rsp)713 ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp)
714 {
715 const struct ethtool_ops *ops = dev->ethtool_ops;
716
717 rsp->info.cmd = ETHTOOL_GDRVINFO;
718 strscpy(rsp->info.version, UTS_RELEASE, sizeof(rsp->info.version));
719 if (ops->get_drvinfo) {
720 ops->get_drvinfo(dev, &rsp->info);
721 } else if (dev->dev.parent && dev->dev.parent->driver) {
722 strscpy(rsp->info.bus_info, dev_name(dev->dev.parent),
723 sizeof(rsp->info.bus_info));
724 strscpy(rsp->info.driver, dev->dev.parent->driver->name,
725 sizeof(rsp->info.driver));
726 } else if (dev->rtnl_link_ops) {
727 strscpy(rsp->info.driver, dev->rtnl_link_ops->kind,
728 sizeof(rsp->info.driver));
729 } else {
730 return -EOPNOTSUPP;
731 }
732
733 /*
734 * this method of obtaining string set info is deprecated;
735 * Use ETHTOOL_GSSET_INFO instead.
736 */
737 if (ops->get_sset_count) {
738 int rc;
739
740 rc = ops->get_sset_count(dev, ETH_SS_TEST);
741 if (rc >= 0)
742 rsp->info.testinfo_len = rc;
743 rc = ops->get_sset_count(dev, ETH_SS_STATS);
744 if (rc >= 0)
745 rsp->info.n_stats = rc;
746 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
747 if (rc >= 0)
748 rsp->info.n_priv_flags = rc;
749 }
750 if (ops->get_regs_len) {
751 int ret = ops->get_regs_len(dev);
752
753 if (ret > 0)
754 rsp->info.regdump_len = ret;
755 }
756
757 if (ops->get_eeprom_len)
758 rsp->info.eedump_len = ops->get_eeprom_len(dev);
759
760 if (!rsp->info.fw_version[0])
761 rsp->devlink = netdev_to_devlink_get(dev);
762
763 return 0;
764 }
765
ethtool_get_sset_info(struct net_device * dev,void __user * useraddr)766 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
767 void __user *useraddr)
768 {
769 struct ethtool_sset_info info;
770 u64 sset_mask;
771 int i, idx = 0, n_bits = 0, ret, rc;
772 u32 *info_buf = NULL;
773
774 if (copy_from_user(&info, useraddr, sizeof(info)))
775 return -EFAULT;
776
777 /* store copy of mask, because we zero struct later on */
778 sset_mask = info.sset_mask;
779 if (!sset_mask)
780 return 0;
781
782 /* calculate size of return buffer */
783 n_bits = hweight64(sset_mask);
784
785 memset(&info, 0, sizeof(info));
786 info.cmd = ETHTOOL_GSSET_INFO;
787
788 info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
789 if (!info_buf)
790 return -ENOMEM;
791
792 /*
793 * fill return buffer based on input bitmask and successful
794 * get_sset_count return
795 */
796 for (i = 0; i < 64; i++) {
797 if (!(sset_mask & (1ULL << i)))
798 continue;
799
800 rc = __ethtool_get_sset_count(dev, i);
801 if (rc >= 0) {
802 info.sset_mask |= (1ULL << i);
803 info_buf[idx++] = rc;
804 }
805 }
806
807 ret = -EFAULT;
808 if (copy_to_user(useraddr, &info, sizeof(info)))
809 goto out;
810
811 useraddr += offsetof(struct ethtool_sset_info, data);
812 if (copy_to_user(useraddr, info_buf, array_size(idx, sizeof(u32))))
813 goto out;
814
815 ret = 0;
816
817 out:
818 kfree(info_buf);
819 return ret;
820 }
821
822 static noinline_for_stack int
ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc * rxnfc,const struct compat_ethtool_rxnfc __user * useraddr,size_t size)823 ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
824 const struct compat_ethtool_rxnfc __user *useraddr,
825 size_t size)
826 {
827 struct compat_ethtool_rxnfc crxnfc = {};
828
829 /* We expect there to be holes between fs.m_ext and
830 * fs.ring_cookie and at the end of fs, but nowhere else.
831 * On non-x86, no conversion should be needed.
832 */
833 BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) &&
834 sizeof(struct compat_ethtool_rxnfc) !=
835 sizeof(struct ethtool_rxnfc));
836 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
837 sizeof(useraddr->fs.m_ext) !=
838 offsetof(struct ethtool_rxnfc, fs.m_ext) +
839 sizeof(rxnfc->fs.m_ext));
840 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) -
841 offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
842 offsetof(struct ethtool_rxnfc, fs.location) -
843 offsetof(struct ethtool_rxnfc, fs.ring_cookie));
844
845 if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc))))
846 return -EFAULT;
847
848 *rxnfc = (struct ethtool_rxnfc) {
849 .cmd = crxnfc.cmd,
850 .flow_type = crxnfc.flow_type,
851 .data = crxnfc.data,
852 .fs = {
853 .flow_type = crxnfc.fs.flow_type,
854 .h_u = crxnfc.fs.h_u,
855 .h_ext = crxnfc.fs.h_ext,
856 .m_u = crxnfc.fs.m_u,
857 .m_ext = crxnfc.fs.m_ext,
858 .ring_cookie = crxnfc.fs.ring_cookie,
859 .location = crxnfc.fs.location,
860 },
861 .rule_cnt = crxnfc.rule_cnt,
862 };
863
864 return 0;
865 }
866
ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc * rxnfc,const void __user * useraddr,size_t size)867 static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc,
868 const void __user *useraddr,
869 size_t size)
870 {
871 if (compat_need_64bit_alignment_fixup())
872 return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size);
873
874 if (copy_from_user(rxnfc, useraddr, size))
875 return -EFAULT;
876
877 return 0;
878 }
879
ethtool_rxnfc_copy_to_compat(void __user * useraddr,const struct ethtool_rxnfc * rxnfc,size_t size,const u32 * rule_buf)880 static int ethtool_rxnfc_copy_to_compat(void __user *useraddr,
881 const struct ethtool_rxnfc *rxnfc,
882 size_t size, const u32 *rule_buf)
883 {
884 struct compat_ethtool_rxnfc crxnfc;
885
886 memset(&crxnfc, 0, sizeof(crxnfc));
887 crxnfc = (struct compat_ethtool_rxnfc) {
888 .cmd = rxnfc->cmd,
889 .flow_type = rxnfc->flow_type,
890 .data = rxnfc->data,
891 .fs = {
892 .flow_type = rxnfc->fs.flow_type,
893 .h_u = rxnfc->fs.h_u,
894 .h_ext = rxnfc->fs.h_ext,
895 .m_u = rxnfc->fs.m_u,
896 .m_ext = rxnfc->fs.m_ext,
897 .ring_cookie = rxnfc->fs.ring_cookie,
898 .location = rxnfc->fs.location,
899 },
900 .rule_cnt = rxnfc->rule_cnt,
901 };
902
903 if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc))))
904 return -EFAULT;
905
906 return 0;
907 }
908
ethtool_rxnfc_copy_to_user(void __user * useraddr,const struct ethtool_rxnfc * rxnfc,size_t size,const u32 * rule_buf)909 static int ethtool_rxnfc_copy_to_user(void __user *useraddr,
910 const struct ethtool_rxnfc *rxnfc,
911 size_t size, const u32 *rule_buf)
912 {
913 int ret;
914
915 if (compat_need_64bit_alignment_fixup()) {
916 ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size,
917 rule_buf);
918 useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs);
919 } else {
920 ret = copy_to_user(useraddr, rxnfc, size);
921 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
922 }
923
924 if (ret)
925 return -EFAULT;
926
927 if (rule_buf) {
928 if (copy_to_user(useraddr, rule_buf,
929 rxnfc->rule_cnt * sizeof(u32)))
930 return -EFAULT;
931 }
932
933 return 0;
934 }
935
ethtool_set_rxnfc(struct net_device * dev,u32 cmd,void __user * useraddr)936 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
937 u32 cmd, void __user *useraddr)
938 {
939 struct ethtool_rxnfc info;
940 size_t info_size = sizeof(info);
941 int rc;
942
943 if (!dev->ethtool_ops->set_rxnfc)
944 return -EOPNOTSUPP;
945
946 /* struct ethtool_rxnfc was originally defined for
947 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
948 * members. User-space might still be using that
949 * definition. */
950 if (cmd == ETHTOOL_SRXFH)
951 info_size = (offsetof(struct ethtool_rxnfc, data) +
952 sizeof(info.data));
953
954 if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
955 return -EFAULT;
956
957 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
958 if (rc)
959 return rc;
960
961 if (cmd == ETHTOOL_SRXCLSRLINS &&
962 ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
963 return -EFAULT;
964
965 return 0;
966 }
967
ethtool_get_rxnfc(struct net_device * dev,u32 cmd,void __user * useraddr)968 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
969 u32 cmd, void __user *useraddr)
970 {
971 struct ethtool_rxnfc info;
972 size_t info_size = sizeof(info);
973 const struct ethtool_ops *ops = dev->ethtool_ops;
974 int ret;
975 void *rule_buf = NULL;
976
977 if (!ops->get_rxnfc)
978 return -EOPNOTSUPP;
979
980 /* struct ethtool_rxnfc was originally defined for
981 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
982 * members. User-space might still be using that
983 * definition. */
984 if (cmd == ETHTOOL_GRXFH)
985 info_size = (offsetof(struct ethtool_rxnfc, data) +
986 sizeof(info.data));
987
988 if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
989 return -EFAULT;
990
991 /* If FLOW_RSS was requested then user-space must be using the
992 * new definition, as FLOW_RSS is newer.
993 */
994 if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
995 info_size = sizeof(info);
996 if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
997 return -EFAULT;
998 /* Since malicious users may modify the original data,
999 * we need to check whether FLOW_RSS is still requested.
1000 */
1001 if (!(info.flow_type & FLOW_RSS))
1002 return -EINVAL;
1003 }
1004
1005 if (info.cmd != cmd)
1006 return -EINVAL;
1007
1008 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1009 if (info.rule_cnt > 0) {
1010 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1011 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
1012 GFP_USER);
1013 if (!rule_buf)
1014 return -ENOMEM;
1015 }
1016 }
1017
1018 ret = ops->get_rxnfc(dev, &info, rule_buf);
1019 if (ret < 0)
1020 goto err_out;
1021
1022 ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
1023 err_out:
1024 kfree(rule_buf);
1025
1026 return ret;
1027 }
1028
ethtool_copy_validate_indir(u32 * indir,void __user * useraddr,struct ethtool_rxnfc * rx_rings,u32 size)1029 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1030 struct ethtool_rxnfc *rx_rings,
1031 u32 size)
1032 {
1033 int i;
1034
1035 if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0]))))
1036 return -EFAULT;
1037
1038 /* Validate ring indices */
1039 for (i = 0; i < size; i++)
1040 if (indir[i] >= rx_rings->data)
1041 return -EINVAL;
1042
1043 return 0;
1044 }
1045
1046 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1047
netdev_rss_key_fill(void * buffer,size_t len)1048 void netdev_rss_key_fill(void *buffer, size_t len)
1049 {
1050 BUG_ON(len > sizeof(netdev_rss_key));
1051 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1052 memcpy(buffer, netdev_rss_key, len);
1053 }
1054 EXPORT_SYMBOL(netdev_rss_key_fill);
1055
ethtool_get_rxfh_indir(struct net_device * dev,void __user * useraddr)1056 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1057 void __user *useraddr)
1058 {
1059 u32 user_size, dev_size;
1060 u32 *indir;
1061 int ret;
1062
1063 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1064 !dev->ethtool_ops->get_rxfh)
1065 return -EOPNOTSUPP;
1066 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1067 if (dev_size == 0)
1068 return -EOPNOTSUPP;
1069
1070 if (copy_from_user(&user_size,
1071 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1072 sizeof(user_size)))
1073 return -EFAULT;
1074
1075 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1076 &dev_size, sizeof(dev_size)))
1077 return -EFAULT;
1078
1079 /* If the user buffer size is 0, this is just a query for the
1080 * device table size. Otherwise, if it's smaller than the
1081 * device table size it's an error.
1082 */
1083 if (user_size < dev_size)
1084 return user_size == 0 ? 0 : -EINVAL;
1085
1086 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1087 if (!indir)
1088 return -ENOMEM;
1089
1090 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1091 if (ret)
1092 goto out;
1093
1094 if (copy_to_user(useraddr +
1095 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1096 indir, dev_size * sizeof(indir[0])))
1097 ret = -EFAULT;
1098
1099 out:
1100 kfree(indir);
1101 return ret;
1102 }
1103
ethtool_set_rxfh_indir(struct net_device * dev,void __user * useraddr)1104 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1105 void __user *useraddr)
1106 {
1107 struct ethtool_rxnfc rx_rings;
1108 u32 user_size, dev_size, i;
1109 u32 *indir;
1110 const struct ethtool_ops *ops = dev->ethtool_ops;
1111 int ret;
1112 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1113
1114 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1115 !ops->get_rxnfc)
1116 return -EOPNOTSUPP;
1117
1118 dev_size = ops->get_rxfh_indir_size(dev);
1119 if (dev_size == 0)
1120 return -EOPNOTSUPP;
1121
1122 if (copy_from_user(&user_size,
1123 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1124 sizeof(user_size)))
1125 return -EFAULT;
1126
1127 if (user_size != 0 && user_size != dev_size)
1128 return -EINVAL;
1129
1130 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1131 if (!indir)
1132 return -ENOMEM;
1133
1134 rx_rings.cmd = ETHTOOL_GRXRINGS;
1135 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1136 if (ret)
1137 goto out;
1138
1139 if (user_size == 0) {
1140 for (i = 0; i < dev_size; i++)
1141 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1142 } else {
1143 ret = ethtool_copy_validate_indir(indir,
1144 useraddr + ringidx_offset,
1145 &rx_rings,
1146 dev_size);
1147 if (ret)
1148 goto out;
1149 }
1150
1151 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1152 if (ret)
1153 goto out;
1154
1155 /* indicate whether rxfh was set to default */
1156 if (user_size == 0)
1157 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1158 else
1159 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1160
1161 out:
1162 kfree(indir);
1163 return ret;
1164 }
1165
ethtool_get_rxfh(struct net_device * dev,void __user * useraddr)1166 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1167 void __user *useraddr)
1168 {
1169 int ret;
1170 const struct ethtool_ops *ops = dev->ethtool_ops;
1171 u32 user_indir_size, user_key_size;
1172 u32 dev_indir_size = 0, dev_key_size = 0;
1173 struct ethtool_rxfh rxfh;
1174 u32 total_size;
1175 u32 indir_bytes;
1176 u32 *indir = NULL;
1177 u8 dev_hfunc = 0;
1178 u8 *hkey = NULL;
1179 u8 *rss_config;
1180
1181 if (!ops->get_rxfh)
1182 return -EOPNOTSUPP;
1183
1184 if (ops->get_rxfh_indir_size)
1185 dev_indir_size = ops->get_rxfh_indir_size(dev);
1186 if (ops->get_rxfh_key_size)
1187 dev_key_size = ops->get_rxfh_key_size(dev);
1188
1189 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1190 return -EFAULT;
1191 user_indir_size = rxfh.indir_size;
1192 user_key_size = rxfh.key_size;
1193
1194 /* Check that reserved fields are 0 for now */
1195 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1196 return -EINVAL;
1197 /* Most drivers don't handle rss_context, check it's 0 as well */
1198 if (rxfh.rss_context && !ops->get_rxfh_context)
1199 return -EOPNOTSUPP;
1200
1201 rxfh.indir_size = dev_indir_size;
1202 rxfh.key_size = dev_key_size;
1203 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1204 return -EFAULT;
1205
1206 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1207 (user_key_size && (user_key_size != dev_key_size)))
1208 return -EINVAL;
1209
1210 indir_bytes = user_indir_size * sizeof(indir[0]);
1211 total_size = indir_bytes + user_key_size;
1212 rss_config = kzalloc(total_size, GFP_USER);
1213 if (!rss_config)
1214 return -ENOMEM;
1215
1216 if (user_indir_size)
1217 indir = (u32 *)rss_config;
1218
1219 if (user_key_size)
1220 hkey = rss_config + indir_bytes;
1221
1222 if (rxfh.rss_context)
1223 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1224 &dev_hfunc,
1225 rxfh.rss_context);
1226 else
1227 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1228 if (ret)
1229 goto out;
1230
1231 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1232 &dev_hfunc, sizeof(rxfh.hfunc))) {
1233 ret = -EFAULT;
1234 } else if (copy_to_user(useraddr +
1235 offsetof(struct ethtool_rxfh, rss_config[0]),
1236 rss_config, total_size)) {
1237 ret = -EFAULT;
1238 }
1239 out:
1240 kfree(rss_config);
1241
1242 return ret;
1243 }
1244
ethtool_set_rxfh(struct net_device * dev,void __user * useraddr)1245 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1246 void __user *useraddr)
1247 {
1248 int ret;
1249 const struct ethtool_ops *ops = dev->ethtool_ops;
1250 struct ethtool_rxnfc rx_rings;
1251 struct ethtool_rxfh rxfh;
1252 u32 dev_indir_size = 0, dev_key_size = 0, i;
1253 u32 *indir = NULL, indir_bytes = 0;
1254 u8 *hkey = NULL;
1255 u8 *rss_config;
1256 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1257 bool delete = false;
1258
1259 if (!ops->get_rxnfc || !ops->set_rxfh)
1260 return -EOPNOTSUPP;
1261
1262 if (ops->get_rxfh_indir_size)
1263 dev_indir_size = ops->get_rxfh_indir_size(dev);
1264 if (ops->get_rxfh_key_size)
1265 dev_key_size = ops->get_rxfh_key_size(dev);
1266
1267 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1268 return -EFAULT;
1269
1270 /* Check that reserved fields are 0 for now */
1271 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1272 return -EINVAL;
1273 /* Most drivers don't handle rss_context, check it's 0 as well */
1274 if (rxfh.rss_context && !ops->set_rxfh_context)
1275 return -EOPNOTSUPP;
1276
1277 /* If either indir, hash key or function is valid, proceed further.
1278 * Must request at least one change: indir size, hash key or function.
1279 */
1280 if ((rxfh.indir_size &&
1281 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1282 rxfh.indir_size != dev_indir_size) ||
1283 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1284 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1285 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1286 return -EINVAL;
1287
1288 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1289 indir_bytes = dev_indir_size * sizeof(indir[0]);
1290
1291 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1292 if (!rss_config)
1293 return -ENOMEM;
1294
1295 rx_rings.cmd = ETHTOOL_GRXRINGS;
1296 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1297 if (ret)
1298 goto out;
1299
1300 /* rxfh.indir_size == 0 means reset the indir table to default (master
1301 * context) or delete the context (other RSS contexts).
1302 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1303 */
1304 if (rxfh.indir_size &&
1305 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1306 indir = (u32 *)rss_config;
1307 ret = ethtool_copy_validate_indir(indir,
1308 useraddr + rss_cfg_offset,
1309 &rx_rings,
1310 rxfh.indir_size);
1311 if (ret)
1312 goto out;
1313 } else if (rxfh.indir_size == 0) {
1314 if (rxfh.rss_context == 0) {
1315 indir = (u32 *)rss_config;
1316 for (i = 0; i < dev_indir_size; i++)
1317 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1318 } else {
1319 delete = true;
1320 }
1321 }
1322
1323 if (rxfh.key_size) {
1324 hkey = rss_config + indir_bytes;
1325 if (copy_from_user(hkey,
1326 useraddr + rss_cfg_offset + indir_bytes,
1327 rxfh.key_size)) {
1328 ret = -EFAULT;
1329 goto out;
1330 }
1331 }
1332
1333 if (rxfh.rss_context)
1334 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1335 &rxfh.rss_context, delete);
1336 else
1337 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1338 if (ret)
1339 goto out;
1340
1341 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1342 &rxfh.rss_context, sizeof(rxfh.rss_context)))
1343 ret = -EFAULT;
1344
1345 if (!rxfh.rss_context) {
1346 /* indicate whether rxfh was set to default */
1347 if (rxfh.indir_size == 0)
1348 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1349 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1350 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1351 }
1352
1353 out:
1354 kfree(rss_config);
1355 return ret;
1356 }
1357
ethtool_get_regs(struct net_device * dev,char __user * useraddr)1358 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1359 {
1360 struct ethtool_regs regs;
1361 const struct ethtool_ops *ops = dev->ethtool_ops;
1362 void *regbuf;
1363 int reglen, ret;
1364
1365 if (!ops->get_regs || !ops->get_regs_len)
1366 return -EOPNOTSUPP;
1367
1368 if (copy_from_user(®s, useraddr, sizeof(regs)))
1369 return -EFAULT;
1370
1371 reglen = ops->get_regs_len(dev);
1372 if (reglen <= 0)
1373 return reglen;
1374
1375 if (regs.len > reglen)
1376 regs.len = reglen;
1377
1378 regbuf = vzalloc(reglen);
1379 if (!regbuf)
1380 return -ENOMEM;
1381
1382 if (regs.len < reglen)
1383 reglen = regs.len;
1384
1385 ops->get_regs(dev, ®s, regbuf);
1386
1387 ret = -EFAULT;
1388 if (copy_to_user(useraddr, ®s, sizeof(regs)))
1389 goto out;
1390 useraddr += offsetof(struct ethtool_regs, data);
1391 if (copy_to_user(useraddr, regbuf, reglen))
1392 goto out;
1393 ret = 0;
1394
1395 out:
1396 vfree(regbuf);
1397 return ret;
1398 }
1399
ethtool_reset(struct net_device * dev,char __user * useraddr)1400 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1401 {
1402 struct ethtool_value reset;
1403 int ret;
1404
1405 if (!dev->ethtool_ops->reset)
1406 return -EOPNOTSUPP;
1407
1408 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1409 return -EFAULT;
1410
1411 ret = dev->ethtool_ops->reset(dev, &reset.data);
1412 if (ret)
1413 return ret;
1414
1415 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1416 return -EFAULT;
1417 return 0;
1418 }
1419
ethtool_get_wol(struct net_device * dev,char __user * useraddr)1420 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1421 {
1422 struct ethtool_wolinfo wol;
1423
1424 if (!dev->ethtool_ops->get_wol)
1425 return -EOPNOTSUPP;
1426
1427 memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1428 wol.cmd = ETHTOOL_GWOL;
1429 dev->ethtool_ops->get_wol(dev, &wol);
1430
1431 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1432 return -EFAULT;
1433 return 0;
1434 }
1435
ethtool_set_wol(struct net_device * dev,char __user * useraddr)1436 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1437 {
1438 struct ethtool_wolinfo wol;
1439 int ret;
1440
1441 if (!dev->ethtool_ops->set_wol)
1442 return -EOPNOTSUPP;
1443
1444 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1445 return -EFAULT;
1446
1447 ret = dev->ethtool_ops->set_wol(dev, &wol);
1448 if (ret)
1449 return ret;
1450
1451 dev->wol_enabled = !!wol.wolopts;
1452 ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1453
1454 return 0;
1455 }
1456
ethtool_get_eee(struct net_device * dev,char __user * useraddr)1457 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1458 {
1459 struct ethtool_eee edata;
1460 int rc;
1461
1462 if (!dev->ethtool_ops->get_eee)
1463 return -EOPNOTSUPP;
1464
1465 memset(&edata, 0, sizeof(struct ethtool_eee));
1466 edata.cmd = ETHTOOL_GEEE;
1467 rc = dev->ethtool_ops->get_eee(dev, &edata);
1468
1469 if (rc)
1470 return rc;
1471
1472 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1473 return -EFAULT;
1474
1475 return 0;
1476 }
1477
ethtool_set_eee(struct net_device * dev,char __user * useraddr)1478 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1479 {
1480 struct ethtool_eee edata;
1481 int ret;
1482
1483 if (!dev->ethtool_ops->set_eee)
1484 return -EOPNOTSUPP;
1485
1486 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1487 return -EFAULT;
1488
1489 ret = dev->ethtool_ops->set_eee(dev, &edata);
1490 if (!ret)
1491 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1492 return ret;
1493 }
1494
ethtool_nway_reset(struct net_device * dev)1495 static int ethtool_nway_reset(struct net_device *dev)
1496 {
1497 if (!dev->ethtool_ops->nway_reset)
1498 return -EOPNOTSUPP;
1499
1500 return dev->ethtool_ops->nway_reset(dev);
1501 }
1502
ethtool_get_link(struct net_device * dev,char __user * useraddr)1503 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1504 {
1505 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1506 int link = __ethtool_get_link(dev);
1507
1508 if (link < 0)
1509 return link;
1510
1511 edata.data = link;
1512 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1513 return -EFAULT;
1514 return 0;
1515 }
1516
ethtool_get_any_eeprom(struct net_device * dev,void __user * useraddr,int (* getter)(struct net_device *,struct ethtool_eeprom *,u8 *),u32 total_len)1517 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1518 int (*getter)(struct net_device *,
1519 struct ethtool_eeprom *, u8 *),
1520 u32 total_len)
1521 {
1522 struct ethtool_eeprom eeprom;
1523 void __user *userbuf = useraddr + sizeof(eeprom);
1524 u32 bytes_remaining;
1525 u8 *data;
1526 int ret = 0;
1527
1528 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1529 return -EFAULT;
1530
1531 /* Check for wrap and zero */
1532 if (eeprom.offset + eeprom.len <= eeprom.offset)
1533 return -EINVAL;
1534
1535 /* Check for exceeding total eeprom len */
1536 if (eeprom.offset + eeprom.len > total_len)
1537 return -EINVAL;
1538
1539 data = kzalloc(PAGE_SIZE, GFP_USER);
1540 if (!data)
1541 return -ENOMEM;
1542
1543 bytes_remaining = eeprom.len;
1544 while (bytes_remaining > 0) {
1545 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1546
1547 ret = getter(dev, &eeprom, data);
1548 if (ret)
1549 break;
1550 if (!eeprom.len) {
1551 ret = -EIO;
1552 break;
1553 }
1554 if (copy_to_user(userbuf, data, eeprom.len)) {
1555 ret = -EFAULT;
1556 break;
1557 }
1558 userbuf += eeprom.len;
1559 eeprom.offset += eeprom.len;
1560 bytes_remaining -= eeprom.len;
1561 }
1562
1563 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1564 eeprom.offset -= eeprom.len;
1565 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1566 ret = -EFAULT;
1567
1568 kfree(data);
1569 return ret;
1570 }
1571
ethtool_get_eeprom(struct net_device * dev,void __user * useraddr)1572 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1573 {
1574 const struct ethtool_ops *ops = dev->ethtool_ops;
1575
1576 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1577 !ops->get_eeprom_len(dev))
1578 return -EOPNOTSUPP;
1579
1580 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1581 ops->get_eeprom_len(dev));
1582 }
1583
ethtool_set_eeprom(struct net_device * dev,void __user * useraddr)1584 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1585 {
1586 struct ethtool_eeprom eeprom;
1587 const struct ethtool_ops *ops = dev->ethtool_ops;
1588 void __user *userbuf = useraddr + sizeof(eeprom);
1589 u32 bytes_remaining;
1590 u8 *data;
1591 int ret = 0;
1592
1593 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1594 !ops->get_eeprom_len(dev))
1595 return -EOPNOTSUPP;
1596
1597 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1598 return -EFAULT;
1599
1600 /* Check for wrap and zero */
1601 if (eeprom.offset + eeprom.len <= eeprom.offset)
1602 return -EINVAL;
1603
1604 /* Check for exceeding total eeprom len */
1605 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1606 return -EINVAL;
1607
1608 data = kzalloc(PAGE_SIZE, GFP_USER);
1609 if (!data)
1610 return -ENOMEM;
1611
1612 bytes_remaining = eeprom.len;
1613 while (bytes_remaining > 0) {
1614 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1615
1616 if (copy_from_user(data, userbuf, eeprom.len)) {
1617 ret = -EFAULT;
1618 break;
1619 }
1620 ret = ops->set_eeprom(dev, &eeprom, data);
1621 if (ret)
1622 break;
1623 userbuf += eeprom.len;
1624 eeprom.offset += eeprom.len;
1625 bytes_remaining -= eeprom.len;
1626 }
1627
1628 kfree(data);
1629 return ret;
1630 }
1631
ethtool_get_coalesce(struct net_device * dev,void __user * useraddr)1632 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1633 void __user *useraddr)
1634 {
1635 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1636 struct kernel_ethtool_coalesce kernel_coalesce = {};
1637 int ret;
1638
1639 if (!dev->ethtool_ops->get_coalesce)
1640 return -EOPNOTSUPP;
1641
1642 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1643 NULL);
1644 if (ret)
1645 return ret;
1646
1647 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1648 return -EFAULT;
1649 return 0;
1650 }
1651
1652 static bool
ethtool_set_coalesce_supported(struct net_device * dev,struct ethtool_coalesce * coalesce)1653 ethtool_set_coalesce_supported(struct net_device *dev,
1654 struct ethtool_coalesce *coalesce)
1655 {
1656 u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1657 u32 nonzero_params = 0;
1658
1659 if (coalesce->rx_coalesce_usecs)
1660 nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1661 if (coalesce->rx_max_coalesced_frames)
1662 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1663 if (coalesce->rx_coalesce_usecs_irq)
1664 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1665 if (coalesce->rx_max_coalesced_frames_irq)
1666 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1667 if (coalesce->tx_coalesce_usecs)
1668 nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1669 if (coalesce->tx_max_coalesced_frames)
1670 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1671 if (coalesce->tx_coalesce_usecs_irq)
1672 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1673 if (coalesce->tx_max_coalesced_frames_irq)
1674 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1675 if (coalesce->stats_block_coalesce_usecs)
1676 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1677 if (coalesce->use_adaptive_rx_coalesce)
1678 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1679 if (coalesce->use_adaptive_tx_coalesce)
1680 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1681 if (coalesce->pkt_rate_low)
1682 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1683 if (coalesce->rx_coalesce_usecs_low)
1684 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1685 if (coalesce->rx_max_coalesced_frames_low)
1686 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1687 if (coalesce->tx_coalesce_usecs_low)
1688 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1689 if (coalesce->tx_max_coalesced_frames_low)
1690 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1691 if (coalesce->pkt_rate_high)
1692 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1693 if (coalesce->rx_coalesce_usecs_high)
1694 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1695 if (coalesce->rx_max_coalesced_frames_high)
1696 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1697 if (coalesce->tx_coalesce_usecs_high)
1698 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1699 if (coalesce->tx_max_coalesced_frames_high)
1700 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1701 if (coalesce->rate_sample_interval)
1702 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1703
1704 return (supported_params & nonzero_params) == nonzero_params;
1705 }
1706
ethtool_set_coalesce(struct net_device * dev,void __user * useraddr)1707 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1708 void __user *useraddr)
1709 {
1710 struct kernel_ethtool_coalesce kernel_coalesce = {};
1711 struct ethtool_coalesce coalesce;
1712 int ret;
1713
1714 if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce)
1715 return -EOPNOTSUPP;
1716
1717 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1718 NULL);
1719 if (ret)
1720 return ret;
1721
1722 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1723 return -EFAULT;
1724
1725 if (!ethtool_set_coalesce_supported(dev, &coalesce))
1726 return -EOPNOTSUPP;
1727
1728 ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
1729 NULL);
1730 if (!ret)
1731 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
1732 return ret;
1733 }
1734
ethtool_get_ringparam(struct net_device * dev,void __user * useraddr)1735 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1736 {
1737 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1738 struct kernel_ethtool_ringparam kernel_ringparam = {};
1739
1740 if (!dev->ethtool_ops->get_ringparam)
1741 return -EOPNOTSUPP;
1742
1743 dev->ethtool_ops->get_ringparam(dev, &ringparam,
1744 &kernel_ringparam, NULL);
1745
1746 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1747 return -EFAULT;
1748 return 0;
1749 }
1750
ethtool_set_ringparam(struct net_device * dev,void __user * useraddr)1751 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1752 {
1753 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1754 struct kernel_ethtool_ringparam kernel_ringparam;
1755 int ret;
1756
1757 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1758 return -EOPNOTSUPP;
1759
1760 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1761 return -EFAULT;
1762
1763 dev->ethtool_ops->get_ringparam(dev, &max, &kernel_ringparam, NULL);
1764
1765 /* ensure new ring parameters are within the maximums */
1766 if (ringparam.rx_pending > max.rx_max_pending ||
1767 ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1768 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1769 ringparam.tx_pending > max.tx_max_pending)
1770 return -EINVAL;
1771
1772 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
1773 &kernel_ringparam, NULL);
1774 if (!ret)
1775 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
1776 return ret;
1777 }
1778
ethtool_get_channels(struct net_device * dev,void __user * useraddr)1779 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1780 void __user *useraddr)
1781 {
1782 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1783
1784 if (!dev->ethtool_ops->get_channels)
1785 return -EOPNOTSUPP;
1786
1787 dev->ethtool_ops->get_channels(dev, &channels);
1788
1789 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1790 return -EFAULT;
1791 return 0;
1792 }
1793
ethtool_set_channels(struct net_device * dev,void __user * useraddr)1794 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1795 void __user *useraddr)
1796 {
1797 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1798 u16 from_channel, to_channel;
1799 u32 max_rx_in_use = 0;
1800 unsigned int i;
1801 int ret;
1802
1803 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1804 return -EOPNOTSUPP;
1805
1806 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1807 return -EFAULT;
1808
1809 dev->ethtool_ops->get_channels(dev, &curr);
1810
1811 if (channels.rx_count == curr.rx_count &&
1812 channels.tx_count == curr.tx_count &&
1813 channels.combined_count == curr.combined_count &&
1814 channels.other_count == curr.other_count)
1815 return 0;
1816
1817 /* ensure new counts are within the maximums */
1818 if (channels.rx_count > curr.max_rx ||
1819 channels.tx_count > curr.max_tx ||
1820 channels.combined_count > curr.max_combined ||
1821 channels.other_count > curr.max_other)
1822 return -EINVAL;
1823
1824 /* ensure there is at least one RX and one TX channel */
1825 if (!channels.combined_count &&
1826 (!channels.rx_count || !channels.tx_count))
1827 return -EINVAL;
1828
1829 /* ensure the new Rx count fits within the configured Rx flow
1830 * indirection table settings */
1831 if (netif_is_rxfh_configured(dev) &&
1832 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1833 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1834 return -EINVAL;
1835
1836 /* Disabling channels, query zero-copy AF_XDP sockets */
1837 from_channel = channels.combined_count +
1838 min(channels.rx_count, channels.tx_count);
1839 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1840 for (i = from_channel; i < to_channel; i++)
1841 if (xsk_get_pool_from_qid(dev, i))
1842 return -EINVAL;
1843
1844 ret = dev->ethtool_ops->set_channels(dev, &channels);
1845 if (!ret)
1846 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
1847 return ret;
1848 }
1849
ethtool_get_pauseparam(struct net_device * dev,void __user * useraddr)1850 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1851 {
1852 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1853
1854 if (!dev->ethtool_ops->get_pauseparam)
1855 return -EOPNOTSUPP;
1856
1857 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1858
1859 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1860 return -EFAULT;
1861 return 0;
1862 }
1863
ethtool_set_pauseparam(struct net_device * dev,void __user * useraddr)1864 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1865 {
1866 struct ethtool_pauseparam pauseparam;
1867 int ret;
1868
1869 if (!dev->ethtool_ops->set_pauseparam)
1870 return -EOPNOTSUPP;
1871
1872 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1873 return -EFAULT;
1874
1875 ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1876 if (!ret)
1877 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
1878 return ret;
1879 }
1880
ethtool_self_test(struct net_device * dev,char __user * useraddr)1881 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1882 {
1883 struct ethtool_test test;
1884 const struct ethtool_ops *ops = dev->ethtool_ops;
1885 u64 *data;
1886 int ret, test_len;
1887
1888 if (!ops->self_test || !ops->get_sset_count)
1889 return -EOPNOTSUPP;
1890
1891 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1892 if (test_len < 0)
1893 return test_len;
1894 WARN_ON(test_len == 0);
1895
1896 if (copy_from_user(&test, useraddr, sizeof(test)))
1897 return -EFAULT;
1898
1899 test.len = test_len;
1900 data = kcalloc(test_len, sizeof(u64), GFP_USER);
1901 if (!data)
1902 return -ENOMEM;
1903
1904 netif_testing_on(dev);
1905 ops->self_test(dev, &test, data);
1906 netif_testing_off(dev);
1907
1908 ret = -EFAULT;
1909 if (copy_to_user(useraddr, &test, sizeof(test)))
1910 goto out;
1911 useraddr += sizeof(test);
1912 if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64))))
1913 goto out;
1914 ret = 0;
1915
1916 out:
1917 kfree(data);
1918 return ret;
1919 }
1920
ethtool_get_strings(struct net_device * dev,void __user * useraddr)1921 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1922 {
1923 struct ethtool_gstrings gstrings;
1924 u8 *data;
1925 int ret;
1926
1927 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1928 return -EFAULT;
1929
1930 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1931 if (ret < 0)
1932 return ret;
1933 if (ret > S32_MAX / ETH_GSTRING_LEN)
1934 return -ENOMEM;
1935 WARN_ON_ONCE(!ret);
1936
1937 gstrings.len = ret;
1938
1939 if (gstrings.len) {
1940 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1941 if (!data)
1942 return -ENOMEM;
1943
1944 __ethtool_get_strings(dev, gstrings.string_set, data);
1945 } else {
1946 data = NULL;
1947 }
1948
1949 ret = -EFAULT;
1950 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1951 goto out;
1952 useraddr += sizeof(gstrings);
1953 if (gstrings.len &&
1954 copy_to_user(useraddr, data,
1955 array_size(gstrings.len, ETH_GSTRING_LEN)))
1956 goto out;
1957 ret = 0;
1958
1959 out:
1960 vfree(data);
1961 return ret;
1962 }
1963
ethtool_sprintf(u8 ** data,const char * fmt,...)1964 __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
1965 {
1966 va_list args;
1967
1968 va_start(args, fmt);
1969 vsnprintf(*data, ETH_GSTRING_LEN, fmt, args);
1970 va_end(args);
1971
1972 *data += ETH_GSTRING_LEN;
1973 }
1974 EXPORT_SYMBOL(ethtool_sprintf);
1975
ethtool_phys_id(struct net_device * dev,void __user * useraddr)1976 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1977 {
1978 struct ethtool_value id;
1979 static bool busy;
1980 const struct ethtool_ops *ops = dev->ethtool_ops;
1981 netdevice_tracker dev_tracker;
1982 int rc;
1983
1984 if (!ops->set_phys_id)
1985 return -EOPNOTSUPP;
1986
1987 if (busy)
1988 return -EBUSY;
1989
1990 if (copy_from_user(&id, useraddr, sizeof(id)))
1991 return -EFAULT;
1992
1993 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1994 if (rc < 0)
1995 return rc;
1996
1997 /* Drop the RTNL lock while waiting, but prevent reentry or
1998 * removal of the device.
1999 */
2000 busy = true;
2001 netdev_hold(dev, &dev_tracker, GFP_KERNEL);
2002 rtnl_unlock();
2003
2004 if (rc == 0) {
2005 /* Driver will handle this itself */
2006 schedule_timeout_interruptible(
2007 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
2008 } else {
2009 /* Driver expects to be called at twice the frequency in rc */
2010 int n = rc * 2, interval = HZ / n;
2011 u64 count = n * id.data, i = 0;
2012
2013 do {
2014 rtnl_lock();
2015 rc = ops->set_phys_id(dev,
2016 (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
2017 rtnl_unlock();
2018 if (rc)
2019 break;
2020 schedule_timeout_interruptible(interval);
2021 } while (!signal_pending(current) && (!id.data || i < count));
2022 }
2023
2024 rtnl_lock();
2025 netdev_put(dev, &dev_tracker);
2026 busy = false;
2027
2028 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
2029 return rc;
2030 }
2031
ethtool_get_stats(struct net_device * dev,void __user * useraddr)2032 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
2033 {
2034 struct ethtool_stats stats;
2035 const struct ethtool_ops *ops = dev->ethtool_ops;
2036 u64 *data;
2037 int ret, n_stats;
2038
2039 if (!ops->get_ethtool_stats || !ops->get_sset_count)
2040 return -EOPNOTSUPP;
2041
2042 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
2043 if (n_stats < 0)
2044 return n_stats;
2045 if (n_stats > S32_MAX / sizeof(u64))
2046 return -ENOMEM;
2047 WARN_ON_ONCE(!n_stats);
2048 if (copy_from_user(&stats, useraddr, sizeof(stats)))
2049 return -EFAULT;
2050
2051 stats.n_stats = n_stats;
2052
2053 if (n_stats) {
2054 data = vzalloc(array_size(n_stats, sizeof(u64)));
2055 if (!data)
2056 return -ENOMEM;
2057 ops->get_ethtool_stats(dev, &stats, data);
2058 } else {
2059 data = NULL;
2060 }
2061
2062 ret = -EFAULT;
2063 if (copy_to_user(useraddr, &stats, sizeof(stats)))
2064 goto out;
2065 useraddr += sizeof(stats);
2066 if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2067 goto out;
2068 ret = 0;
2069
2070 out:
2071 vfree(data);
2072 return ret;
2073 }
2074
ethtool_get_phy_stats(struct net_device * dev,void __user * useraddr)2075 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2076 {
2077 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
2078 const struct ethtool_ops *ops = dev->ethtool_ops;
2079 struct phy_device *phydev = dev->phydev;
2080 struct ethtool_stats stats;
2081 u64 *data;
2082 int ret, n_stats;
2083
2084 if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
2085 return -EOPNOTSUPP;
2086
2087 if (phydev && !ops->get_ethtool_phy_stats &&
2088 phy_ops && phy_ops->get_sset_count)
2089 n_stats = phy_ops->get_sset_count(phydev);
2090 else
2091 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
2092 if (n_stats < 0)
2093 return n_stats;
2094 if (n_stats > S32_MAX / sizeof(u64))
2095 return -ENOMEM;
2096 WARN_ON_ONCE(!n_stats);
2097
2098 if (copy_from_user(&stats, useraddr, sizeof(stats)))
2099 return -EFAULT;
2100
2101 stats.n_stats = n_stats;
2102
2103 if (n_stats) {
2104 data = vzalloc(array_size(n_stats, sizeof(u64)));
2105 if (!data)
2106 return -ENOMEM;
2107
2108 if (phydev && !ops->get_ethtool_phy_stats &&
2109 phy_ops && phy_ops->get_stats) {
2110 ret = phy_ops->get_stats(phydev, &stats, data);
2111 if (ret < 0)
2112 goto out;
2113 } else {
2114 ops->get_ethtool_phy_stats(dev, &stats, data);
2115 }
2116 } else {
2117 data = NULL;
2118 }
2119
2120 ret = -EFAULT;
2121 if (copy_to_user(useraddr, &stats, sizeof(stats)))
2122 goto out;
2123 useraddr += sizeof(stats);
2124 if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2125 goto out;
2126 ret = 0;
2127
2128 out:
2129 vfree(data);
2130 return ret;
2131 }
2132
ethtool_get_perm_addr(struct net_device * dev,void __user * useraddr)2133 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2134 {
2135 struct ethtool_perm_addr epaddr;
2136
2137 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2138 return -EFAULT;
2139
2140 if (epaddr.size < dev->addr_len)
2141 return -ETOOSMALL;
2142 epaddr.size = dev->addr_len;
2143
2144 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2145 return -EFAULT;
2146 useraddr += sizeof(epaddr);
2147 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2148 return -EFAULT;
2149 return 0;
2150 }
2151
ethtool_get_value(struct net_device * dev,char __user * useraddr,u32 cmd,u32 (* actor)(struct net_device *))2152 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2153 u32 cmd, u32 (*actor)(struct net_device *))
2154 {
2155 struct ethtool_value edata = { .cmd = cmd };
2156
2157 if (!actor)
2158 return -EOPNOTSUPP;
2159
2160 edata.data = actor(dev);
2161
2162 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2163 return -EFAULT;
2164 return 0;
2165 }
2166
ethtool_set_value_void(struct net_device * dev,char __user * useraddr,void (* actor)(struct net_device *,u32))2167 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2168 void (*actor)(struct net_device *, u32))
2169 {
2170 struct ethtool_value edata;
2171
2172 if (!actor)
2173 return -EOPNOTSUPP;
2174
2175 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2176 return -EFAULT;
2177
2178 actor(dev, edata.data);
2179 return 0;
2180 }
2181
ethtool_set_value(struct net_device * dev,char __user * useraddr,int (* actor)(struct net_device *,u32))2182 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2183 int (*actor)(struct net_device *, u32))
2184 {
2185 struct ethtool_value edata;
2186
2187 if (!actor)
2188 return -EOPNOTSUPP;
2189
2190 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2191 return -EFAULT;
2192
2193 return actor(dev, edata.data);
2194 }
2195
2196 static int
ethtool_flash_device(struct net_device * dev,struct ethtool_devlink_compat * req)2197 ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req)
2198 {
2199 if (!dev->ethtool_ops->flash_device) {
2200 req->devlink = netdev_to_devlink_get(dev);
2201 return 0;
2202 }
2203
2204 return dev->ethtool_ops->flash_device(dev, &req->efl);
2205 }
2206
ethtool_set_dump(struct net_device * dev,void __user * useraddr)2207 static int ethtool_set_dump(struct net_device *dev,
2208 void __user *useraddr)
2209 {
2210 struct ethtool_dump dump;
2211
2212 if (!dev->ethtool_ops->set_dump)
2213 return -EOPNOTSUPP;
2214
2215 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2216 return -EFAULT;
2217
2218 return dev->ethtool_ops->set_dump(dev, &dump);
2219 }
2220
ethtool_get_dump_flag(struct net_device * dev,void __user * useraddr)2221 static int ethtool_get_dump_flag(struct net_device *dev,
2222 void __user *useraddr)
2223 {
2224 int ret;
2225 struct ethtool_dump dump;
2226 const struct ethtool_ops *ops = dev->ethtool_ops;
2227
2228 if (!ops->get_dump_flag)
2229 return -EOPNOTSUPP;
2230
2231 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2232 return -EFAULT;
2233
2234 ret = ops->get_dump_flag(dev, &dump);
2235 if (ret)
2236 return ret;
2237
2238 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2239 return -EFAULT;
2240 return 0;
2241 }
2242
ethtool_get_dump_data(struct net_device * dev,void __user * useraddr)2243 static int ethtool_get_dump_data(struct net_device *dev,
2244 void __user *useraddr)
2245 {
2246 int ret;
2247 __u32 len;
2248 struct ethtool_dump dump, tmp;
2249 const struct ethtool_ops *ops = dev->ethtool_ops;
2250 void *data = NULL;
2251
2252 if (!ops->get_dump_data || !ops->get_dump_flag)
2253 return -EOPNOTSUPP;
2254
2255 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2256 return -EFAULT;
2257
2258 memset(&tmp, 0, sizeof(tmp));
2259 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2260 ret = ops->get_dump_flag(dev, &tmp);
2261 if (ret)
2262 return ret;
2263
2264 len = min(tmp.len, dump.len);
2265 if (!len)
2266 return -EFAULT;
2267
2268 /* Don't ever let the driver think there's more space available
2269 * than it requested with .get_dump_flag().
2270 */
2271 dump.len = len;
2272
2273 /* Always allocate enough space to hold the whole thing so that the
2274 * driver does not need to check the length and bother with partial
2275 * dumping.
2276 */
2277 data = vzalloc(tmp.len);
2278 if (!data)
2279 return -ENOMEM;
2280 ret = ops->get_dump_data(dev, &dump, data);
2281 if (ret)
2282 goto out;
2283
2284 /* There are two sane possibilities:
2285 * 1. The driver's .get_dump_data() does not touch dump.len.
2286 * 2. Or it may set dump.len to how much it really writes, which
2287 * should be tmp.len (or len if it can do a partial dump).
2288 * In any case respond to userspace with the actual length of data
2289 * it's receiving.
2290 */
2291 WARN_ON(dump.len != len && dump.len != tmp.len);
2292 dump.len = len;
2293
2294 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2295 ret = -EFAULT;
2296 goto out;
2297 }
2298 useraddr += offsetof(struct ethtool_dump, data);
2299 if (copy_to_user(useraddr, data, len))
2300 ret = -EFAULT;
2301 out:
2302 vfree(data);
2303 return ret;
2304 }
2305
ethtool_get_ts_info(struct net_device * dev,void __user * useraddr)2306 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2307 {
2308 struct ethtool_ts_info info;
2309 int err;
2310
2311 err = __ethtool_get_ts_info(dev, &info);
2312 if (err)
2313 return err;
2314
2315 if (copy_to_user(useraddr, &info, sizeof(info)))
2316 return -EFAULT;
2317
2318 return 0;
2319 }
2320
ethtool_get_module_info_call(struct net_device * dev,struct ethtool_modinfo * modinfo)2321 int ethtool_get_module_info_call(struct net_device *dev,
2322 struct ethtool_modinfo *modinfo)
2323 {
2324 const struct ethtool_ops *ops = dev->ethtool_ops;
2325 struct phy_device *phydev = dev->phydev;
2326
2327 if (dev->sfp_bus)
2328 return sfp_get_module_info(dev->sfp_bus, modinfo);
2329
2330 if (phydev && phydev->drv && phydev->drv->module_info)
2331 return phydev->drv->module_info(phydev, modinfo);
2332
2333 if (ops->get_module_info)
2334 return ops->get_module_info(dev, modinfo);
2335
2336 return -EOPNOTSUPP;
2337 }
2338
ethtool_get_module_info(struct net_device * dev,void __user * useraddr)2339 static int ethtool_get_module_info(struct net_device *dev,
2340 void __user *useraddr)
2341 {
2342 int ret;
2343 struct ethtool_modinfo modinfo;
2344
2345 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2346 return -EFAULT;
2347
2348 ret = ethtool_get_module_info_call(dev, &modinfo);
2349 if (ret)
2350 return ret;
2351
2352 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2353 return -EFAULT;
2354
2355 return 0;
2356 }
2357
ethtool_get_module_eeprom_call(struct net_device * dev,struct ethtool_eeprom * ee,u8 * data)2358 int ethtool_get_module_eeprom_call(struct net_device *dev,
2359 struct ethtool_eeprom *ee, u8 *data)
2360 {
2361 const struct ethtool_ops *ops = dev->ethtool_ops;
2362 struct phy_device *phydev = dev->phydev;
2363
2364 if (dev->sfp_bus)
2365 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2366
2367 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2368 return phydev->drv->module_eeprom(phydev, ee, data);
2369
2370 if (ops->get_module_eeprom)
2371 return ops->get_module_eeprom(dev, ee, data);
2372
2373 return -EOPNOTSUPP;
2374 }
2375
ethtool_get_module_eeprom(struct net_device * dev,void __user * useraddr)2376 static int ethtool_get_module_eeprom(struct net_device *dev,
2377 void __user *useraddr)
2378 {
2379 int ret;
2380 struct ethtool_modinfo modinfo;
2381
2382 ret = ethtool_get_module_info_call(dev, &modinfo);
2383 if (ret)
2384 return ret;
2385
2386 return ethtool_get_any_eeprom(dev, useraddr,
2387 ethtool_get_module_eeprom_call,
2388 modinfo.eeprom_len);
2389 }
2390
ethtool_tunable_valid(const struct ethtool_tunable * tuna)2391 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2392 {
2393 switch (tuna->id) {
2394 case ETHTOOL_RX_COPYBREAK:
2395 case ETHTOOL_TX_COPYBREAK:
2396 case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
2397 if (tuna->len != sizeof(u32) ||
2398 tuna->type_id != ETHTOOL_TUNABLE_U32)
2399 return -EINVAL;
2400 break;
2401 case ETHTOOL_PFC_PREVENTION_TOUT:
2402 if (tuna->len != sizeof(u16) ||
2403 tuna->type_id != ETHTOOL_TUNABLE_U16)
2404 return -EINVAL;
2405 break;
2406 default:
2407 return -EINVAL;
2408 }
2409
2410 return 0;
2411 }
2412
ethtool_get_tunable(struct net_device * dev,void __user * useraddr)2413 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2414 {
2415 int ret;
2416 struct ethtool_tunable tuna;
2417 const struct ethtool_ops *ops = dev->ethtool_ops;
2418 void *data;
2419
2420 if (!ops->get_tunable)
2421 return -EOPNOTSUPP;
2422 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2423 return -EFAULT;
2424 ret = ethtool_tunable_valid(&tuna);
2425 if (ret)
2426 return ret;
2427 data = kzalloc(tuna.len, GFP_USER);
2428 if (!data)
2429 return -ENOMEM;
2430 ret = ops->get_tunable(dev, &tuna, data);
2431 if (ret)
2432 goto out;
2433 useraddr += sizeof(tuna);
2434 ret = -EFAULT;
2435 if (copy_to_user(useraddr, data, tuna.len))
2436 goto out;
2437 ret = 0;
2438
2439 out:
2440 kfree(data);
2441 return ret;
2442 }
2443
ethtool_set_tunable(struct net_device * dev,void __user * useraddr)2444 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2445 {
2446 int ret;
2447 struct ethtool_tunable tuna;
2448 const struct ethtool_ops *ops = dev->ethtool_ops;
2449 void *data;
2450
2451 if (!ops->set_tunable)
2452 return -EOPNOTSUPP;
2453 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2454 return -EFAULT;
2455 ret = ethtool_tunable_valid(&tuna);
2456 if (ret)
2457 return ret;
2458 useraddr += sizeof(tuna);
2459 data = memdup_user(useraddr, tuna.len);
2460 if (IS_ERR(data))
2461 return PTR_ERR(data);
2462 ret = ops->set_tunable(dev, &tuna, data);
2463
2464 kfree(data);
2465 return ret;
2466 }
2467
2468 static noinline_for_stack int
ethtool_get_per_queue_coalesce(struct net_device * dev,void __user * useraddr,struct ethtool_per_queue_op * per_queue_opt)2469 ethtool_get_per_queue_coalesce(struct net_device *dev,
2470 void __user *useraddr,
2471 struct ethtool_per_queue_op *per_queue_opt)
2472 {
2473 u32 bit;
2474 int ret;
2475 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2476
2477 if (!dev->ethtool_ops->get_per_queue_coalesce)
2478 return -EOPNOTSUPP;
2479
2480 useraddr += sizeof(*per_queue_opt);
2481
2482 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2483 MAX_NUM_QUEUE);
2484
2485 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2486 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2487
2488 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2489 if (ret != 0)
2490 return ret;
2491 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2492 return -EFAULT;
2493 useraddr += sizeof(coalesce);
2494 }
2495
2496 return 0;
2497 }
2498
2499 static noinline_for_stack int
ethtool_set_per_queue_coalesce(struct net_device * dev,void __user * useraddr,struct ethtool_per_queue_op * per_queue_opt)2500 ethtool_set_per_queue_coalesce(struct net_device *dev,
2501 void __user *useraddr,
2502 struct ethtool_per_queue_op *per_queue_opt)
2503 {
2504 u32 bit;
2505 int i, ret = 0;
2506 int n_queue;
2507 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2508 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2509
2510 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2511 (!dev->ethtool_ops->get_per_queue_coalesce))
2512 return -EOPNOTSUPP;
2513
2514 useraddr += sizeof(*per_queue_opt);
2515
2516 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2517 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2518 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2519 if (!backup)
2520 return -ENOMEM;
2521
2522 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2523 struct ethtool_coalesce coalesce;
2524
2525 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2526 if (ret != 0)
2527 goto roll_back;
2528
2529 tmp++;
2530
2531 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2532 ret = -EFAULT;
2533 goto roll_back;
2534 }
2535
2536 if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2537 ret = -EOPNOTSUPP;
2538 goto roll_back;
2539 }
2540
2541 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2542 if (ret != 0)
2543 goto roll_back;
2544
2545 useraddr += sizeof(coalesce);
2546 }
2547
2548 roll_back:
2549 if (ret != 0) {
2550 tmp = backup;
2551 for_each_set_bit(i, queue_mask, bit) {
2552 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2553 tmp++;
2554 }
2555 }
2556 kfree(backup);
2557
2558 return ret;
2559 }
2560
ethtool_set_per_queue(struct net_device * dev,void __user * useraddr,u32 sub_cmd)2561 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2562 void __user *useraddr, u32 sub_cmd)
2563 {
2564 struct ethtool_per_queue_op per_queue_opt;
2565
2566 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2567 return -EFAULT;
2568
2569 if (per_queue_opt.sub_command != sub_cmd)
2570 return -EINVAL;
2571
2572 switch (per_queue_opt.sub_command) {
2573 case ETHTOOL_GCOALESCE:
2574 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2575 case ETHTOOL_SCOALESCE:
2576 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2577 default:
2578 return -EOPNOTSUPP;
2579 }
2580 }
2581
ethtool_phy_tunable_valid(const struct ethtool_tunable * tuna)2582 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2583 {
2584 switch (tuna->id) {
2585 case ETHTOOL_PHY_DOWNSHIFT:
2586 case ETHTOOL_PHY_FAST_LINK_DOWN:
2587 if (tuna->len != sizeof(u8) ||
2588 tuna->type_id != ETHTOOL_TUNABLE_U8)
2589 return -EINVAL;
2590 break;
2591 case ETHTOOL_PHY_EDPD:
2592 if (tuna->len != sizeof(u16) ||
2593 tuna->type_id != ETHTOOL_TUNABLE_U16)
2594 return -EINVAL;
2595 break;
2596 default:
2597 return -EINVAL;
2598 }
2599
2600 return 0;
2601 }
2602
get_phy_tunable(struct net_device * dev,void __user * useraddr)2603 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2604 {
2605 struct phy_device *phydev = dev->phydev;
2606 struct ethtool_tunable tuna;
2607 bool phy_drv_tunable;
2608 void *data;
2609 int ret;
2610
2611 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2612 if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
2613 return -EOPNOTSUPP;
2614 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2615 return -EFAULT;
2616 ret = ethtool_phy_tunable_valid(&tuna);
2617 if (ret)
2618 return ret;
2619 data = kzalloc(tuna.len, GFP_USER);
2620 if (!data)
2621 return -ENOMEM;
2622 if (phy_drv_tunable) {
2623 mutex_lock(&phydev->lock);
2624 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2625 mutex_unlock(&phydev->lock);
2626 } else {
2627 ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
2628 }
2629 if (ret)
2630 goto out;
2631 useraddr += sizeof(tuna);
2632 ret = -EFAULT;
2633 if (copy_to_user(useraddr, data, tuna.len))
2634 goto out;
2635 ret = 0;
2636
2637 out:
2638 kfree(data);
2639 return ret;
2640 }
2641
set_phy_tunable(struct net_device * dev,void __user * useraddr)2642 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2643 {
2644 struct phy_device *phydev = dev->phydev;
2645 struct ethtool_tunable tuna;
2646 bool phy_drv_tunable;
2647 void *data;
2648 int ret;
2649
2650 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2651 if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
2652 return -EOPNOTSUPP;
2653 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2654 return -EFAULT;
2655 ret = ethtool_phy_tunable_valid(&tuna);
2656 if (ret)
2657 return ret;
2658 useraddr += sizeof(tuna);
2659 data = memdup_user(useraddr, tuna.len);
2660 if (IS_ERR(data))
2661 return PTR_ERR(data);
2662 if (phy_drv_tunable) {
2663 mutex_lock(&phydev->lock);
2664 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2665 mutex_unlock(&phydev->lock);
2666 } else {
2667 ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
2668 }
2669
2670 kfree(data);
2671 return ret;
2672 }
2673
ethtool_get_fecparam(struct net_device * dev,void __user * useraddr)2674 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2675 {
2676 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2677 int rc;
2678
2679 if (!dev->ethtool_ops->get_fecparam)
2680 return -EOPNOTSUPP;
2681
2682 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2683 if (rc)
2684 return rc;
2685
2686 if (WARN_ON_ONCE(fecparam.reserved))
2687 fecparam.reserved = 0;
2688
2689 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2690 return -EFAULT;
2691 return 0;
2692 }
2693
ethtool_set_fecparam(struct net_device * dev,void __user * useraddr)2694 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2695 {
2696 struct ethtool_fecparam fecparam;
2697
2698 if (!dev->ethtool_ops->set_fecparam)
2699 return -EOPNOTSUPP;
2700
2701 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2702 return -EFAULT;
2703
2704 if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE)
2705 return -EINVAL;
2706
2707 fecparam.active_fec = 0;
2708 fecparam.reserved = 0;
2709
2710 return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2711 }
2712
2713 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
2714
2715 static int
__dev_ethtool(struct net * net,struct ifreq * ifr,void __user * useraddr,u32 ethcmd,struct ethtool_devlink_compat * devlink_state)2716 __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr,
2717 u32 ethcmd, struct ethtool_devlink_compat *devlink_state)
2718 {
2719 struct net_device *dev;
2720 u32 sub_cmd;
2721 int rc;
2722 netdev_features_t old_features;
2723
2724 dev = __dev_get_by_name(net, ifr->ifr_name);
2725 if (!dev)
2726 return -ENODEV;
2727
2728 if (ethcmd == ETHTOOL_PERQUEUE) {
2729 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2730 return -EFAULT;
2731 } else {
2732 sub_cmd = ethcmd;
2733 }
2734 /* Allow some commands to be done by anyone */
2735 switch (sub_cmd) {
2736 case ETHTOOL_GSET:
2737 case ETHTOOL_GDRVINFO:
2738 case ETHTOOL_GMSGLVL:
2739 case ETHTOOL_GLINK:
2740 case ETHTOOL_GCOALESCE:
2741 case ETHTOOL_GRINGPARAM:
2742 case ETHTOOL_GPAUSEPARAM:
2743 case ETHTOOL_GRXCSUM:
2744 case ETHTOOL_GTXCSUM:
2745 case ETHTOOL_GSG:
2746 case ETHTOOL_GSSET_INFO:
2747 case ETHTOOL_GSTRINGS:
2748 case ETHTOOL_GSTATS:
2749 case ETHTOOL_GPHYSTATS:
2750 case ETHTOOL_GTSO:
2751 case ETHTOOL_GPERMADDR:
2752 case ETHTOOL_GUFO:
2753 case ETHTOOL_GGSO:
2754 case ETHTOOL_GGRO:
2755 case ETHTOOL_GFLAGS:
2756 case ETHTOOL_GPFLAGS:
2757 case ETHTOOL_GRXFH:
2758 case ETHTOOL_GRXRINGS:
2759 case ETHTOOL_GRXCLSRLCNT:
2760 case ETHTOOL_GRXCLSRULE:
2761 case ETHTOOL_GRXCLSRLALL:
2762 case ETHTOOL_GRXFHINDIR:
2763 case ETHTOOL_GRSSH:
2764 case ETHTOOL_GFEATURES:
2765 case ETHTOOL_GCHANNELS:
2766 case ETHTOOL_GET_TS_INFO:
2767 case ETHTOOL_GEEE:
2768 case ETHTOOL_GTUNABLE:
2769 case ETHTOOL_PHY_GTUNABLE:
2770 case ETHTOOL_GLINKSETTINGS:
2771 case ETHTOOL_GFECPARAM:
2772 break;
2773 default:
2774 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2775 return -EPERM;
2776 }
2777
2778 if (dev->dev.parent)
2779 pm_runtime_get_sync(dev->dev.parent);
2780
2781 if (!netif_device_present(dev)) {
2782 rc = -ENODEV;
2783 goto out;
2784 }
2785
2786 if (dev->ethtool_ops->begin) {
2787 rc = dev->ethtool_ops->begin(dev);
2788 if (rc < 0)
2789 goto out;
2790 }
2791 old_features = dev->features;
2792
2793 switch (ethcmd) {
2794 case ETHTOOL_GSET:
2795 rc = ethtool_get_settings(dev, useraddr);
2796 break;
2797 case ETHTOOL_SSET:
2798 rc = ethtool_set_settings(dev, useraddr);
2799 break;
2800 case ETHTOOL_GDRVINFO:
2801 rc = ethtool_get_drvinfo(dev, devlink_state);
2802 break;
2803 case ETHTOOL_GREGS:
2804 rc = ethtool_get_regs(dev, useraddr);
2805 break;
2806 case ETHTOOL_GWOL:
2807 rc = ethtool_get_wol(dev, useraddr);
2808 break;
2809 case ETHTOOL_SWOL:
2810 rc = ethtool_set_wol(dev, useraddr);
2811 break;
2812 case ETHTOOL_GMSGLVL:
2813 rc = ethtool_get_value(dev, useraddr, ethcmd,
2814 dev->ethtool_ops->get_msglevel);
2815 break;
2816 case ETHTOOL_SMSGLVL:
2817 rc = ethtool_set_value_void(dev, useraddr,
2818 dev->ethtool_ops->set_msglevel);
2819 if (!rc)
2820 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2821 break;
2822 case ETHTOOL_GEEE:
2823 rc = ethtool_get_eee(dev, useraddr);
2824 break;
2825 case ETHTOOL_SEEE:
2826 rc = ethtool_set_eee(dev, useraddr);
2827 break;
2828 case ETHTOOL_NWAY_RST:
2829 rc = ethtool_nway_reset(dev);
2830 break;
2831 case ETHTOOL_GLINK:
2832 rc = ethtool_get_link(dev, useraddr);
2833 break;
2834 case ETHTOOL_GEEPROM:
2835 rc = ethtool_get_eeprom(dev, useraddr);
2836 break;
2837 case ETHTOOL_SEEPROM:
2838 rc = ethtool_set_eeprom(dev, useraddr);
2839 break;
2840 case ETHTOOL_GCOALESCE:
2841 rc = ethtool_get_coalesce(dev, useraddr);
2842 break;
2843 case ETHTOOL_SCOALESCE:
2844 rc = ethtool_set_coalesce(dev, useraddr);
2845 break;
2846 case ETHTOOL_GRINGPARAM:
2847 rc = ethtool_get_ringparam(dev, useraddr);
2848 break;
2849 case ETHTOOL_SRINGPARAM:
2850 rc = ethtool_set_ringparam(dev, useraddr);
2851 break;
2852 case ETHTOOL_GPAUSEPARAM:
2853 rc = ethtool_get_pauseparam(dev, useraddr);
2854 break;
2855 case ETHTOOL_SPAUSEPARAM:
2856 rc = ethtool_set_pauseparam(dev, useraddr);
2857 break;
2858 case ETHTOOL_TEST:
2859 rc = ethtool_self_test(dev, useraddr);
2860 break;
2861 case ETHTOOL_GSTRINGS:
2862 rc = ethtool_get_strings(dev, useraddr);
2863 break;
2864 case ETHTOOL_PHYS_ID:
2865 rc = ethtool_phys_id(dev, useraddr);
2866 break;
2867 case ETHTOOL_GSTATS:
2868 rc = ethtool_get_stats(dev, useraddr);
2869 break;
2870 case ETHTOOL_GPERMADDR:
2871 rc = ethtool_get_perm_addr(dev, useraddr);
2872 break;
2873 case ETHTOOL_GFLAGS:
2874 rc = ethtool_get_value(dev, useraddr, ethcmd,
2875 __ethtool_get_flags);
2876 break;
2877 case ETHTOOL_SFLAGS:
2878 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2879 break;
2880 case ETHTOOL_GPFLAGS:
2881 rc = ethtool_get_value(dev, useraddr, ethcmd,
2882 dev->ethtool_ops->get_priv_flags);
2883 if (!rc)
2884 ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
2885 break;
2886 case ETHTOOL_SPFLAGS:
2887 rc = ethtool_set_value(dev, useraddr,
2888 dev->ethtool_ops->set_priv_flags);
2889 break;
2890 case ETHTOOL_GRXFH:
2891 case ETHTOOL_GRXRINGS:
2892 case ETHTOOL_GRXCLSRLCNT:
2893 case ETHTOOL_GRXCLSRULE:
2894 case ETHTOOL_GRXCLSRLALL:
2895 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2896 break;
2897 case ETHTOOL_SRXFH:
2898 case ETHTOOL_SRXCLSRLDEL:
2899 case ETHTOOL_SRXCLSRLINS:
2900 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2901 break;
2902 case ETHTOOL_FLASHDEV:
2903 rc = ethtool_flash_device(dev, devlink_state);
2904 break;
2905 case ETHTOOL_RESET:
2906 rc = ethtool_reset(dev, useraddr);
2907 break;
2908 case ETHTOOL_GSSET_INFO:
2909 rc = ethtool_get_sset_info(dev, useraddr);
2910 break;
2911 case ETHTOOL_GRXFHINDIR:
2912 rc = ethtool_get_rxfh_indir(dev, useraddr);
2913 break;
2914 case ETHTOOL_SRXFHINDIR:
2915 rc = ethtool_set_rxfh_indir(dev, useraddr);
2916 break;
2917 case ETHTOOL_GRSSH:
2918 rc = ethtool_get_rxfh(dev, useraddr);
2919 break;
2920 case ETHTOOL_SRSSH:
2921 rc = ethtool_set_rxfh(dev, useraddr);
2922 break;
2923 case ETHTOOL_GFEATURES:
2924 rc = ethtool_get_features(dev, useraddr);
2925 break;
2926 case ETHTOOL_SFEATURES:
2927 rc = ethtool_set_features(dev, useraddr);
2928 break;
2929 case ETHTOOL_GTXCSUM:
2930 case ETHTOOL_GRXCSUM:
2931 case ETHTOOL_GSG:
2932 case ETHTOOL_GTSO:
2933 case ETHTOOL_GGSO:
2934 case ETHTOOL_GGRO:
2935 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2936 break;
2937 case ETHTOOL_STXCSUM:
2938 case ETHTOOL_SRXCSUM:
2939 case ETHTOOL_SSG:
2940 case ETHTOOL_STSO:
2941 case ETHTOOL_SGSO:
2942 case ETHTOOL_SGRO:
2943 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2944 break;
2945 case ETHTOOL_GCHANNELS:
2946 rc = ethtool_get_channels(dev, useraddr);
2947 break;
2948 case ETHTOOL_SCHANNELS:
2949 rc = ethtool_set_channels(dev, useraddr);
2950 break;
2951 case ETHTOOL_SET_DUMP:
2952 rc = ethtool_set_dump(dev, useraddr);
2953 break;
2954 case ETHTOOL_GET_DUMP_FLAG:
2955 rc = ethtool_get_dump_flag(dev, useraddr);
2956 break;
2957 case ETHTOOL_GET_DUMP_DATA:
2958 rc = ethtool_get_dump_data(dev, useraddr);
2959 break;
2960 case ETHTOOL_GET_TS_INFO:
2961 rc = ethtool_get_ts_info(dev, useraddr);
2962 break;
2963 case ETHTOOL_GMODULEINFO:
2964 rc = ethtool_get_module_info(dev, useraddr);
2965 break;
2966 case ETHTOOL_GMODULEEEPROM:
2967 rc = ethtool_get_module_eeprom(dev, useraddr);
2968 break;
2969 case ETHTOOL_GTUNABLE:
2970 rc = ethtool_get_tunable(dev, useraddr);
2971 break;
2972 case ETHTOOL_STUNABLE:
2973 rc = ethtool_set_tunable(dev, useraddr);
2974 break;
2975 case ETHTOOL_GPHYSTATS:
2976 rc = ethtool_get_phy_stats(dev, useraddr);
2977 break;
2978 case ETHTOOL_PERQUEUE:
2979 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2980 break;
2981 case ETHTOOL_GLINKSETTINGS:
2982 rc = ethtool_get_link_ksettings(dev, useraddr);
2983 break;
2984 case ETHTOOL_SLINKSETTINGS:
2985 rc = ethtool_set_link_ksettings(dev, useraddr);
2986 break;
2987 case ETHTOOL_PHY_GTUNABLE:
2988 rc = get_phy_tunable(dev, useraddr);
2989 break;
2990 case ETHTOOL_PHY_STUNABLE:
2991 rc = set_phy_tunable(dev, useraddr);
2992 break;
2993 case ETHTOOL_GFECPARAM:
2994 rc = ethtool_get_fecparam(dev, useraddr);
2995 break;
2996 case ETHTOOL_SFECPARAM:
2997 rc = ethtool_set_fecparam(dev, useraddr);
2998 break;
2999 default:
3000 rc = -EOPNOTSUPP;
3001 }
3002
3003 if (dev->ethtool_ops->complete)
3004 dev->ethtool_ops->complete(dev);
3005
3006 if (old_features != dev->features)
3007 netdev_features_change(dev);
3008 out:
3009 if (dev->dev.parent)
3010 pm_runtime_put(dev->dev.parent);
3011
3012 return rc;
3013 }
3014
dev_ethtool(struct net * net,struct ifreq * ifr,void __user * useraddr)3015 int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
3016 {
3017 struct ethtool_devlink_compat *state;
3018 u32 ethcmd;
3019 int rc;
3020
3021 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
3022 return -EFAULT;
3023
3024 state = kzalloc(sizeof(*state), GFP_KERNEL);
3025 if (!state)
3026 return -ENOMEM;
3027
3028 switch (ethcmd) {
3029 case ETHTOOL_FLASHDEV:
3030 if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) {
3031 rc = -EFAULT;
3032 goto exit_free;
3033 }
3034 state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
3035 break;
3036 }
3037
3038 rtnl_lock();
3039 rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state);
3040 rtnl_unlock();
3041 if (rc)
3042 goto exit_free;
3043
3044 switch (ethcmd) {
3045 case ETHTOOL_FLASHDEV:
3046 if (state->devlink)
3047 rc = devlink_compat_flash_update(state->devlink,
3048 state->efl.data);
3049 break;
3050 case ETHTOOL_GDRVINFO:
3051 if (state->devlink)
3052 devlink_compat_running_version(state->devlink,
3053 state->info.fw_version,
3054 sizeof(state->info.fw_version));
3055 if (copy_to_user(useraddr, &state->info, sizeof(state->info))) {
3056 rc = -EFAULT;
3057 goto exit_free;
3058 }
3059 break;
3060 }
3061
3062 exit_free:
3063 if (state->devlink)
3064 devlink_put(state->devlink);
3065 kfree(state);
3066 return rc;
3067 }
3068
3069 struct ethtool_rx_flow_key {
3070 struct flow_dissector_key_basic basic;
3071 union {
3072 struct flow_dissector_key_ipv4_addrs ipv4;
3073 struct flow_dissector_key_ipv6_addrs ipv6;
3074 };
3075 struct flow_dissector_key_ports tp;
3076 struct flow_dissector_key_ip ip;
3077 struct flow_dissector_key_vlan vlan;
3078 struct flow_dissector_key_eth_addrs eth_addrs;
3079 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
3080
3081 struct ethtool_rx_flow_match {
3082 struct flow_dissector dissector;
3083 struct ethtool_rx_flow_key key;
3084 struct ethtool_rx_flow_key mask;
3085 };
3086
3087 struct ethtool_rx_flow_rule *
ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input * input)3088 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
3089 {
3090 const struct ethtool_rx_flow_spec *fs = input->fs;
3091 static struct in6_addr zero_addr = {};
3092 struct ethtool_rx_flow_match *match;
3093 struct ethtool_rx_flow_rule *flow;
3094 struct flow_action_entry *act;
3095
3096 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
3097 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
3098 if (!flow)
3099 return ERR_PTR(-ENOMEM);
3100
3101 /* ethtool_rx supports only one single action per rule. */
3102 flow->rule = flow_rule_alloc(1);
3103 if (!flow->rule) {
3104 kfree(flow);
3105 return ERR_PTR(-ENOMEM);
3106 }
3107
3108 match = (struct ethtool_rx_flow_match *)flow->priv;
3109 flow->rule->match.dissector = &match->dissector;
3110 flow->rule->match.mask = &match->mask;
3111 flow->rule->match.key = &match->key;
3112
3113 match->mask.basic.n_proto = htons(0xffff);
3114
3115 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3116 case ETHER_FLOW: {
3117 const struct ethhdr *ether_spec, *ether_m_spec;
3118
3119 ether_spec = &fs->h_u.ether_spec;
3120 ether_m_spec = &fs->m_u.ether_spec;
3121
3122 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
3123 ether_addr_copy(match->key.eth_addrs.src,
3124 ether_spec->h_source);
3125 ether_addr_copy(match->mask.eth_addrs.src,
3126 ether_m_spec->h_source);
3127 }
3128 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
3129 ether_addr_copy(match->key.eth_addrs.dst,
3130 ether_spec->h_dest);
3131 ether_addr_copy(match->mask.eth_addrs.dst,
3132 ether_m_spec->h_dest);
3133 }
3134 if (ether_m_spec->h_proto) {
3135 match->key.basic.n_proto = ether_spec->h_proto;
3136 match->mask.basic.n_proto = ether_m_spec->h_proto;
3137 }
3138 }
3139 break;
3140 case TCP_V4_FLOW:
3141 case UDP_V4_FLOW: {
3142 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
3143
3144 match->key.basic.n_proto = htons(ETH_P_IP);
3145
3146 v4_spec = &fs->h_u.tcp_ip4_spec;
3147 v4_m_spec = &fs->m_u.tcp_ip4_spec;
3148
3149 if (v4_m_spec->ip4src) {
3150 match->key.ipv4.src = v4_spec->ip4src;
3151 match->mask.ipv4.src = v4_m_spec->ip4src;
3152 }
3153 if (v4_m_spec->ip4dst) {
3154 match->key.ipv4.dst = v4_spec->ip4dst;
3155 match->mask.ipv4.dst = v4_m_spec->ip4dst;
3156 }
3157 if (v4_m_spec->ip4src ||
3158 v4_m_spec->ip4dst) {
3159 match->dissector.used_keys |=
3160 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
3161 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
3162 offsetof(struct ethtool_rx_flow_key, ipv4);
3163 }
3164 if (v4_m_spec->psrc) {
3165 match->key.tp.src = v4_spec->psrc;
3166 match->mask.tp.src = v4_m_spec->psrc;
3167 }
3168 if (v4_m_spec->pdst) {
3169 match->key.tp.dst = v4_spec->pdst;
3170 match->mask.tp.dst = v4_m_spec->pdst;
3171 }
3172 if (v4_m_spec->psrc ||
3173 v4_m_spec->pdst) {
3174 match->dissector.used_keys |=
3175 BIT(FLOW_DISSECTOR_KEY_PORTS);
3176 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3177 offsetof(struct ethtool_rx_flow_key, tp);
3178 }
3179 if (v4_m_spec->tos) {
3180 match->key.ip.tos = v4_spec->tos;
3181 match->mask.ip.tos = v4_m_spec->tos;
3182 match->dissector.used_keys |=
3183 BIT(FLOW_DISSECTOR_KEY_IP);
3184 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3185 offsetof(struct ethtool_rx_flow_key, ip);
3186 }
3187 }
3188 break;
3189 case TCP_V6_FLOW:
3190 case UDP_V6_FLOW: {
3191 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
3192
3193 match->key.basic.n_proto = htons(ETH_P_IPV6);
3194
3195 v6_spec = &fs->h_u.tcp_ip6_spec;
3196 v6_m_spec = &fs->m_u.tcp_ip6_spec;
3197 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
3198 memcpy(&match->key.ipv6.src, v6_spec->ip6src,
3199 sizeof(match->key.ipv6.src));
3200 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
3201 sizeof(match->mask.ipv6.src));
3202 }
3203 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
3204 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
3205 sizeof(match->key.ipv6.dst));
3206 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
3207 sizeof(match->mask.ipv6.dst));
3208 }
3209 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
3210 memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
3211 match->dissector.used_keys |=
3212 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
3213 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
3214 offsetof(struct ethtool_rx_flow_key, ipv6);
3215 }
3216 if (v6_m_spec->psrc) {
3217 match->key.tp.src = v6_spec->psrc;
3218 match->mask.tp.src = v6_m_spec->psrc;
3219 }
3220 if (v6_m_spec->pdst) {
3221 match->key.tp.dst = v6_spec->pdst;
3222 match->mask.tp.dst = v6_m_spec->pdst;
3223 }
3224 if (v6_m_spec->psrc ||
3225 v6_m_spec->pdst) {
3226 match->dissector.used_keys |=
3227 BIT(FLOW_DISSECTOR_KEY_PORTS);
3228 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3229 offsetof(struct ethtool_rx_flow_key, tp);
3230 }
3231 if (v6_m_spec->tclass) {
3232 match->key.ip.tos = v6_spec->tclass;
3233 match->mask.ip.tos = v6_m_spec->tclass;
3234 match->dissector.used_keys |=
3235 BIT(FLOW_DISSECTOR_KEY_IP);
3236 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3237 offsetof(struct ethtool_rx_flow_key, ip);
3238 }
3239 }
3240 break;
3241 default:
3242 ethtool_rx_flow_rule_destroy(flow);
3243 return ERR_PTR(-EINVAL);
3244 }
3245
3246 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3247 case TCP_V4_FLOW:
3248 case TCP_V6_FLOW:
3249 match->key.basic.ip_proto = IPPROTO_TCP;
3250 match->mask.basic.ip_proto = 0xff;
3251 break;
3252 case UDP_V4_FLOW:
3253 case UDP_V6_FLOW:
3254 match->key.basic.ip_proto = IPPROTO_UDP;
3255 match->mask.basic.ip_proto = 0xff;
3256 break;
3257 }
3258
3259 match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
3260 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3261 offsetof(struct ethtool_rx_flow_key, basic);
3262
3263 if (fs->flow_type & FLOW_EXT) {
3264 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3265 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3266
3267 if (ext_m_spec->vlan_etype) {
3268 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3269 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3270 }
3271
3272 if (ext_m_spec->vlan_tci) {
3273 match->key.vlan.vlan_id =
3274 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3275 match->mask.vlan.vlan_id =
3276 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3277
3278 match->key.vlan.vlan_dei =
3279 !!(ext_h_spec->vlan_tci & htons(0x1000));
3280 match->mask.vlan.vlan_dei =
3281 !!(ext_m_spec->vlan_tci & htons(0x1000));
3282
3283 match->key.vlan.vlan_priority =
3284 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3285 match->mask.vlan.vlan_priority =
3286 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3287 }
3288
3289 if (ext_m_spec->vlan_etype ||
3290 ext_m_spec->vlan_tci) {
3291 match->dissector.used_keys |=
3292 BIT(FLOW_DISSECTOR_KEY_VLAN);
3293 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3294 offsetof(struct ethtool_rx_flow_key, vlan);
3295 }
3296 }
3297 if (fs->flow_type & FLOW_MAC_EXT) {
3298 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3299 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3300
3301 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3302 ETH_ALEN);
3303 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3304 ETH_ALEN);
3305
3306 match->dissector.used_keys |=
3307 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3308 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3309 offsetof(struct ethtool_rx_flow_key, eth_addrs);
3310 }
3311
3312 act = &flow->rule->action.entries[0];
3313 switch (fs->ring_cookie) {
3314 case RX_CLS_FLOW_DISC:
3315 act->id = FLOW_ACTION_DROP;
3316 break;
3317 case RX_CLS_FLOW_WAKE:
3318 act->id = FLOW_ACTION_WAKE;
3319 break;
3320 default:
3321 act->id = FLOW_ACTION_QUEUE;
3322 if (fs->flow_type & FLOW_RSS)
3323 act->queue.ctx = input->rss_ctx;
3324
3325 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3326 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3327 break;
3328 }
3329
3330 return flow;
3331 }
3332 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3333
ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule * flow)3334 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3335 {
3336 kfree(flow->rule);
3337 kfree(flow);
3338 }
3339 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);
3340
