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1/*
2 * net/core/ethtool.c - Ethtool ioctl handler
3 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
4 *
5 * This file is where we call all the ethtool_ops commands to get
6 * the information ethtool needs.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14#include <linux/module.h>
15#include <linux/types.h>
16#include <linux/capability.h>
17#include <linux/errno.h>
18#include <linux/ethtool.h>
19#include <linux/netdevice.h>
20#include <linux/net_tstamp.h>
21#include <linux/phy.h>
22#include <linux/bitops.h>
23#include <linux/uaccess.h>
24#include <linux/vmalloc.h>
25#include <linux/slab.h>
26#include <linux/rtnetlink.h>
27#include <linux/sched.h>
28
29/*
30 * Some useful ethtool_ops methods that're device independent.
31 * If we find that all drivers want to do the same thing here,
32 * we can turn these into dev_() function calls.
33 */
34
35u32 ethtool_op_get_link(struct net_device *dev)
36{
37 return netif_carrier_ok(dev) ? 1 : 0;
38}
39EXPORT_SYMBOL(ethtool_op_get_link);
40
41int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
42{
43 info->so_timestamping =
44 SOF_TIMESTAMPING_TX_SOFTWARE |
45 SOF_TIMESTAMPING_RX_SOFTWARE |
46 SOF_TIMESTAMPING_SOFTWARE;
47 info->phc_index = -1;
48 return 0;
49}
50EXPORT_SYMBOL(ethtool_op_get_ts_info);
51
52/* Handlers for each ethtool command */
53
54#define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
55
56static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
57 [NETIF_F_SG_BIT] = "tx-scatter-gather",
58 [NETIF_F_IP_CSUM_BIT] = "tx-checksum-ipv4",
59 [NETIF_F_HW_CSUM_BIT] = "tx-checksum-ip-generic",
60 [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6",
61 [NETIF_F_HIGHDMA_BIT] = "highdma",
62 [NETIF_F_FRAGLIST_BIT] = "tx-scatter-gather-fraglist",
63 [NETIF_F_HW_VLAN_TX_BIT] = "tx-vlan-hw-insert",
64
65 [NETIF_F_HW_VLAN_RX_BIT] = "rx-vlan-hw-parse",
66 [NETIF_F_HW_VLAN_FILTER_BIT] = "rx-vlan-filter",
67 [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged",
68 [NETIF_F_GSO_BIT] = "tx-generic-segmentation",
69 [NETIF_F_LLTX_BIT] = "tx-lockless",
70 [NETIF_F_NETNS_LOCAL_BIT] = "netns-local",
71 [NETIF_F_GRO_BIT] = "rx-gro",
72 [NETIF_F_LRO_BIT] = "rx-lro",
73
74 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation",
75 [NETIF_F_UFO_BIT] = "tx-udp-fragmentation",
76 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
77 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
78 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
79 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
80
81 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
82 [NETIF_F_SCTP_CSUM_BIT] = "tx-checksum-sctp",
83 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
84 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
85 [NETIF_F_RXHASH_BIT] = "rx-hashing",
86 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
87 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
88 [NETIF_F_LOOPBACK_BIT] = "loopback",
89 [NETIF_F_RXFCS_BIT] = "rx-fcs",
90 [NETIF_F_RXALL_BIT] = "rx-all",
91};
92
93static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
94{
95 struct ethtool_gfeatures cmd = {
96 .cmd = ETHTOOL_GFEATURES,
97 .size = ETHTOOL_DEV_FEATURE_WORDS,
98 };
99 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
100 u32 __user *sizeaddr;
101 u32 copy_size;
102 int i;
103
104 /* in case feature bits run out again */
105 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
106
107 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
108 features[i].available = (u32)(dev->hw_features >> (32 * i));
109 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
110 features[i].active = (u32)(dev->features >> (32 * i));
111 features[i].never_changed =
112 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
113 }
114
115 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
116 if (get_user(copy_size, sizeaddr))
117 return -EFAULT;
118
119 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
120 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
121
122 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
123 return -EFAULT;
124 useraddr += sizeof(cmd);
125 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
126 return -EFAULT;
127
128 return 0;
129}
130
131static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
132{
133 struct ethtool_sfeatures cmd;
134 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
135 netdev_features_t wanted = 0, valid = 0;
136 int i, ret = 0;
137
138 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
139 return -EFAULT;
140 useraddr += sizeof(cmd);
141
142 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
143 return -EINVAL;
144
145 if (copy_from_user(features, useraddr, sizeof(features)))
146 return -EFAULT;
147
148 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
149 valid |= (netdev_features_t)features[i].valid << (32 * i);
150 wanted |= (netdev_features_t)features[i].requested << (32 * i);
151 }
152
153 if (valid & ~NETIF_F_ETHTOOL_BITS)
154 return -EINVAL;
155
156 if (valid & ~dev->hw_features) {
157 valid &= dev->hw_features;
158 ret |= ETHTOOL_F_UNSUPPORTED;
159 }
160
161 dev->wanted_features &= ~valid;
162 dev->wanted_features |= wanted & valid;
163 __netdev_update_features(dev);
164
165 if ((dev->wanted_features ^ dev->features) & valid)
166 ret |= ETHTOOL_F_WISH;
167
168 return ret;
169}
170
171static int __ethtool_get_sset_count(struct net_device *dev, int sset)
172{
173 const struct ethtool_ops *ops = dev->ethtool_ops;
174
175 if (sset == ETH_SS_FEATURES)
176 return ARRAY_SIZE(netdev_features_strings);
177
178 if (ops && ops->get_sset_count && ops->get_strings)
179 return ops->get_sset_count(dev, sset);
180 else
181 return -EOPNOTSUPP;
182}
183
184static void __ethtool_get_strings(struct net_device *dev,
185 u32 stringset, u8 *data)
186{
187 const struct ethtool_ops *ops = dev->ethtool_ops;
188
189 if (stringset == ETH_SS_FEATURES)
190 memcpy(data, netdev_features_strings,
191 sizeof(netdev_features_strings));
192 else
193 /* ops->get_strings is valid because checked earlier */
194 ops->get_strings(dev, stringset, data);
195}
196
197static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
198{
199 /* feature masks of legacy discrete ethtool ops */
200
201 switch (eth_cmd) {
202 case ETHTOOL_GTXCSUM:
203 case ETHTOOL_STXCSUM:
204 return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM;
205 case ETHTOOL_GRXCSUM:
206 case ETHTOOL_SRXCSUM:
207 return NETIF_F_RXCSUM;
208 case ETHTOOL_GSG:
209 case ETHTOOL_SSG:
210 return NETIF_F_SG;
211 case ETHTOOL_GTSO:
212 case ETHTOOL_STSO:
213 return NETIF_F_ALL_TSO;
214 case ETHTOOL_GUFO:
215 case ETHTOOL_SUFO:
216 return NETIF_F_UFO;
217 case ETHTOOL_GGSO:
218 case ETHTOOL_SGSO:
219 return NETIF_F_GSO;
220 case ETHTOOL_GGRO:
221 case ETHTOOL_SGRO:
222 return NETIF_F_GRO;
223 default:
224 BUG();
225 }
226}
227
228static int ethtool_get_one_feature(struct net_device *dev,
229 char __user *useraddr, u32 ethcmd)
230{
231 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
232 struct ethtool_value edata = {
233 .cmd = ethcmd,
234 .data = !!(dev->features & mask),
235 };
236
237 if (copy_to_user(useraddr, &edata, sizeof(edata)))
238 return -EFAULT;
239 return 0;
240}
241
242static int ethtool_set_one_feature(struct net_device *dev,
243 void __user *useraddr, u32 ethcmd)
244{
245 struct ethtool_value edata;
246 netdev_features_t mask;
247
248 if (copy_from_user(&edata, useraddr, sizeof(edata)))
249 return -EFAULT;
250
251 mask = ethtool_get_feature_mask(ethcmd);
252 mask &= dev->hw_features;
253 if (!mask)
254 return -EOPNOTSUPP;
255
256 if (edata.data)
257 dev->wanted_features |= mask;
258 else
259 dev->wanted_features &= ~mask;
260
261 __netdev_update_features(dev);
262
263 return 0;
264}
265
266#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
267 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
268#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_RX | \
269 NETIF_F_HW_VLAN_TX | NETIF_F_NTUPLE | NETIF_F_RXHASH)
270
271static u32 __ethtool_get_flags(struct net_device *dev)
272{
273 u32 flags = 0;
274
275 if (dev->features & NETIF_F_LRO) flags |= ETH_FLAG_LRO;
276 if (dev->features & NETIF_F_HW_VLAN_RX) flags |= ETH_FLAG_RXVLAN;
277 if (dev->features & NETIF_F_HW_VLAN_TX) flags |= ETH_FLAG_TXVLAN;
278 if (dev->features & NETIF_F_NTUPLE) flags |= ETH_FLAG_NTUPLE;
279 if (dev->features & NETIF_F_RXHASH) flags |= ETH_FLAG_RXHASH;
280
281 return flags;
282}
283
284static int __ethtool_set_flags(struct net_device *dev, u32 data)
285{
286 netdev_features_t features = 0, changed;
287
288 if (data & ~ETH_ALL_FLAGS)
289 return -EINVAL;
290
291 if (data & ETH_FLAG_LRO) features |= NETIF_F_LRO;
292 if (data & ETH_FLAG_RXVLAN) features |= NETIF_F_HW_VLAN_RX;
293 if (data & ETH_FLAG_TXVLAN) features |= NETIF_F_HW_VLAN_TX;
294 if (data & ETH_FLAG_NTUPLE) features |= NETIF_F_NTUPLE;
295 if (data & ETH_FLAG_RXHASH) features |= NETIF_F_RXHASH;
296
297 /* allow changing only bits set in hw_features */
298 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
299 if (changed & ~dev->hw_features)
300 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
301
302 dev->wanted_features =
303 (dev->wanted_features & ~changed) | (features & changed);
304
305 __netdev_update_features(dev);
306
307 return 0;
308}
309
310int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
311{
312 ASSERT_RTNL();
313
314 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
315 return -EOPNOTSUPP;
316
317 memset(cmd, 0, sizeof(struct ethtool_cmd));
318 cmd->cmd = ETHTOOL_GSET;
319 return dev->ethtool_ops->get_settings(dev, cmd);
320}
321EXPORT_SYMBOL(__ethtool_get_settings);
322
323static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
324{
325 int err;
326 struct ethtool_cmd cmd;
327
328 err = __ethtool_get_settings(dev, &cmd);
329 if (err < 0)
330 return err;
331
332 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
333 return -EFAULT;
334 return 0;
335}
336
337static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
338{
339 struct ethtool_cmd cmd;
340
341 if (!dev->ethtool_ops->set_settings)
342 return -EOPNOTSUPP;
343
344 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
345 return -EFAULT;
346
347 return dev->ethtool_ops->set_settings(dev, &cmd);
348}
349
350static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
351 void __user *useraddr)
352{
353 struct ethtool_drvinfo info;
354 const struct ethtool_ops *ops = dev->ethtool_ops;
355
356 memset(&info, 0, sizeof(info));
357 info.cmd = ETHTOOL_GDRVINFO;
358 if (ops && ops->get_drvinfo) {
359 ops->get_drvinfo(dev, &info);
360 } else if (dev->dev.parent && dev->dev.parent->driver) {
361 strlcpy(info.bus_info, dev_name(dev->dev.parent),
362 sizeof(info.bus_info));
363 strlcpy(info.driver, dev->dev.parent->driver->name,
364 sizeof(info.driver));
365 } else {
366 return -EOPNOTSUPP;
367 }
368
369 /*
370 * this method of obtaining string set info is deprecated;
371 * Use ETHTOOL_GSSET_INFO instead.
372 */
373 if (ops && ops->get_sset_count) {
374 int rc;
375
376 rc = ops->get_sset_count(dev, ETH_SS_TEST);
377 if (rc >= 0)
378 info.testinfo_len = rc;
379 rc = ops->get_sset_count(dev, ETH_SS_STATS);
380 if (rc >= 0)
381 info.n_stats = rc;
382 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
383 if (rc >= 0)
384 info.n_priv_flags = rc;
385 }
386 if (ops && ops->get_regs_len)
387 info.regdump_len = ops->get_regs_len(dev);
388 if (ops && ops->get_eeprom_len)
389 info.eedump_len = ops->get_eeprom_len(dev);
390
391 if (copy_to_user(useraddr, &info, sizeof(info)))
392 return -EFAULT;
393 return 0;
394}
395
396static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
397 void __user *useraddr)
398{
399 struct ethtool_sset_info info;
400 u64 sset_mask;
401 int i, idx = 0, n_bits = 0, ret, rc;
402 u32 *info_buf = NULL;
403
404 if (copy_from_user(&info, useraddr, sizeof(info)))
405 return -EFAULT;
406
407 /* store copy of mask, because we zero struct later on */
408 sset_mask = info.sset_mask;
409 if (!sset_mask)
410 return 0;
411
412 /* calculate size of return buffer */
413 n_bits = hweight64(sset_mask);
414
415 memset(&info, 0, sizeof(info));
416 info.cmd = ETHTOOL_GSSET_INFO;
417
418 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
419 if (!info_buf)
420 return -ENOMEM;
421
422 /*
423 * fill return buffer based on input bitmask and successful
424 * get_sset_count return
425 */
426 for (i = 0; i < 64; i++) {
427 if (!(sset_mask & (1ULL << i)))
428 continue;
429
430 rc = __ethtool_get_sset_count(dev, i);
431 if (rc >= 0) {
432 info.sset_mask |= (1ULL << i);
433 info_buf[idx++] = rc;
434 }
435 }
436
437 ret = -EFAULT;
438 if (copy_to_user(useraddr, &info, sizeof(info)))
439 goto out;
440
441 useraddr += offsetof(struct ethtool_sset_info, data);
442 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
443 goto out;
444
445 ret = 0;
446
447out:
448 kfree(info_buf);
449 return ret;
450}
451
452static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
453 u32 cmd, void __user *useraddr)
454{
455 struct ethtool_rxnfc info;
456 size_t info_size = sizeof(info);
457 int rc;
458
459 if (!dev->ethtool_ops->set_rxnfc)
460 return -EOPNOTSUPP;
461
462 /* struct ethtool_rxnfc was originally defined for
463 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
464 * members. User-space might still be using that
465 * definition. */
466 if (cmd == ETHTOOL_SRXFH)
467 info_size = (offsetof(struct ethtool_rxnfc, data) +
468 sizeof(info.data));
469
470 if (copy_from_user(&info, useraddr, info_size))
471 return -EFAULT;
472
473 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
474 if (rc)
475 return rc;
476
477 if (cmd == ETHTOOL_SRXCLSRLINS &&
478 copy_to_user(useraddr, &info, info_size))
479 return -EFAULT;
480
481 return 0;
482}
483
484static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
485 u32 cmd, void __user *useraddr)
486{
487 struct ethtool_rxnfc info;
488 size_t info_size = sizeof(info);
489 const struct ethtool_ops *ops = dev->ethtool_ops;
490 int ret;
491 void *rule_buf = NULL;
492
493 if (!ops->get_rxnfc)
494 return -EOPNOTSUPP;
495
496 /* struct ethtool_rxnfc was originally defined for
497 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
498 * members. User-space might still be using that
499 * definition. */
500 if (cmd == ETHTOOL_GRXFH)
501 info_size = (offsetof(struct ethtool_rxnfc, data) +
502 sizeof(info.data));
503
504 if (copy_from_user(&info, useraddr, info_size))
505 return -EFAULT;
506
507 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
508 if (info.rule_cnt > 0) {
509 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
510 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
511 GFP_USER);
512 if (!rule_buf)
513 return -ENOMEM;
514 }
515 }
516
517 ret = ops->get_rxnfc(dev, &info, rule_buf);
518 if (ret < 0)
519 goto err_out;
520
521 ret = -EFAULT;
522 if (copy_to_user(useraddr, &info, info_size))
523 goto err_out;
524
525 if (rule_buf) {
526 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
527 if (copy_to_user(useraddr, rule_buf,
528 info.rule_cnt * sizeof(u32)))
529 goto err_out;
530 }
531 ret = 0;
532
533err_out:
534 kfree(rule_buf);
535
536 return ret;
537}
538
539static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
540 void __user *useraddr)
541{
542 u32 user_size, dev_size;
543 u32 *indir;
544 int ret;
545
546 if (!dev->ethtool_ops->get_rxfh_indir_size ||
547 !dev->ethtool_ops->get_rxfh_indir)
548 return -EOPNOTSUPP;
549 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
550 if (dev_size == 0)
551 return -EOPNOTSUPP;
552
553 if (copy_from_user(&user_size,
554 useraddr + offsetof(struct ethtool_rxfh_indir, size),
555 sizeof(user_size)))
556 return -EFAULT;
557
558 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
559 &dev_size, sizeof(dev_size)))
560 return -EFAULT;
561
562 /* If the user buffer size is 0, this is just a query for the
563 * device table size. Otherwise, if it's smaller than the
564 * device table size it's an error.
565 */
566 if (user_size < dev_size)
567 return user_size == 0 ? 0 : -EINVAL;
568
569 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
570 if (!indir)
571 return -ENOMEM;
572
573 ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
574 if (ret)
575 goto out;
576
577 if (copy_to_user(useraddr +
578 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
579 indir, dev_size * sizeof(indir[0])))
580 ret = -EFAULT;
581
582out:
583 kfree(indir);
584 return ret;
585}
586
587static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
588 void __user *useraddr)
589{
590 struct ethtool_rxnfc rx_rings;
591 u32 user_size, dev_size, i;
592 u32 *indir;
593 int ret;
594
595 if (!dev->ethtool_ops->get_rxfh_indir_size ||
596 !dev->ethtool_ops->set_rxfh_indir ||
597 !dev->ethtool_ops->get_rxnfc)
598 return -EOPNOTSUPP;
599 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
600 if (dev_size == 0)
601 return -EOPNOTSUPP;
602
603 if (copy_from_user(&user_size,
604 useraddr + offsetof(struct ethtool_rxfh_indir, size),
605 sizeof(user_size)))
606 return -EFAULT;
607
608 if (user_size != 0 && user_size != dev_size)
609 return -EINVAL;
610
611 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
612 if (!indir)
613 return -ENOMEM;
614
615 rx_rings.cmd = ETHTOOL_GRXRINGS;
616 ret = dev->ethtool_ops->get_rxnfc(dev, &rx_rings, NULL);
617 if (ret)
618 goto out;
619
620 if (user_size == 0) {
621 for (i = 0; i < dev_size; i++)
622 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
623 } else {
624 if (copy_from_user(indir,
625 useraddr +
626 offsetof(struct ethtool_rxfh_indir,
627 ring_index[0]),
628 dev_size * sizeof(indir[0]))) {
629 ret = -EFAULT;
630 goto out;
631 }
632
633 /* Validate ring indices */
634 for (i = 0; i < dev_size; i++) {
635 if (indir[i] >= rx_rings.data) {
636 ret = -EINVAL;
637 goto out;
638 }
639 }
640 }
641
642 ret = dev->ethtool_ops->set_rxfh_indir(dev, indir);
643
644out:
645 kfree(indir);
646 return ret;
647}
648
649static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
650{
651 struct ethtool_regs regs;
652 const struct ethtool_ops *ops = dev->ethtool_ops;
653 void *regbuf;
654 int reglen, ret;
655
656 if (!ops->get_regs || !ops->get_regs_len)
657 return -EOPNOTSUPP;
658
659 if (copy_from_user(®s, useraddr, sizeof(regs)))
660 return -EFAULT;
661
662 reglen = ops->get_regs_len(dev);
663 if (regs.len > reglen)
664 regs.len = reglen;
665
666 regbuf = vzalloc(reglen);
667 if (reglen && !regbuf)
668 return -ENOMEM;
669
670 ops->get_regs(dev, ®s, regbuf);
671
672 ret = -EFAULT;
673 if (copy_to_user(useraddr, ®s, sizeof(regs)))
674 goto out;
675 useraddr += offsetof(struct ethtool_regs, data);
676 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
677 goto out;
678 ret = 0;
679
680 out:
681 vfree(regbuf);
682 return ret;
683}
684
685static int ethtool_reset(struct net_device *dev, char __user *useraddr)
686{
687 struct ethtool_value reset;
688 int ret;
689
690 if (!dev->ethtool_ops->reset)
691 return -EOPNOTSUPP;
692
693 if (copy_from_user(&reset, useraddr, sizeof(reset)))
694 return -EFAULT;
695
696 ret = dev->ethtool_ops->reset(dev, &reset.data);
697 if (ret)
698 return ret;
699
700 if (copy_to_user(useraddr, &reset, sizeof(reset)))
701 return -EFAULT;
702 return 0;
703}
704
705static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
706{
707 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
708
709 if (!dev->ethtool_ops->get_wol)
710 return -EOPNOTSUPP;
711
712 dev->ethtool_ops->get_wol(dev, &wol);
713
714 if (copy_to_user(useraddr, &wol, sizeof(wol)))
715 return -EFAULT;
716 return 0;
717}
718
719static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
720{
721 struct ethtool_wolinfo wol;
722
723 if (!dev->ethtool_ops->set_wol)
724 return -EOPNOTSUPP;
725
726 if (copy_from_user(&wol, useraddr, sizeof(wol)))
727 return -EFAULT;
728
729 return dev->ethtool_ops->set_wol(dev, &wol);
730}
731
732static int ethtool_nway_reset(struct net_device *dev)
733{
734 if (!dev->ethtool_ops->nway_reset)
735 return -EOPNOTSUPP;
736
737 return dev->ethtool_ops->nway_reset(dev);
738}
739
740static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
741{
742 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
743
744 if (!dev->ethtool_ops->get_link)
745 return -EOPNOTSUPP;
746
747 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
748
749 if (copy_to_user(useraddr, &edata, sizeof(edata)))
750 return -EFAULT;
751 return 0;
752}
753
754static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
755 int (*getter)(struct net_device *,
756 struct ethtool_eeprom *, u8 *),
757 u32 total_len)
758{
759 struct ethtool_eeprom eeprom;
760 void __user *userbuf = useraddr + sizeof(eeprom);
761 u32 bytes_remaining;
762 u8 *data;
763 int ret = 0;
764
765 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
766 return -EFAULT;
767
768 /* Check for wrap and zero */
769 if (eeprom.offset + eeprom.len <= eeprom.offset)
770 return -EINVAL;
771
772 /* Check for exceeding total eeprom len */
773 if (eeprom.offset + eeprom.len > total_len)
774 return -EINVAL;
775
776 data = kmalloc(PAGE_SIZE, GFP_USER);
777 if (!data)
778 return -ENOMEM;
779
780 bytes_remaining = eeprom.len;
781 while (bytes_remaining > 0) {
782 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
783
784 ret = getter(dev, &eeprom, data);
785 if (ret)
786 break;
787 if (copy_to_user(userbuf, data, eeprom.len)) {
788 ret = -EFAULT;
789 break;
790 }
791 userbuf += eeprom.len;
792 eeprom.offset += eeprom.len;
793 bytes_remaining -= eeprom.len;
794 }
795
796 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
797 eeprom.offset -= eeprom.len;
798 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
799 ret = -EFAULT;
800
801 kfree(data);
802 return ret;
803}
804
805static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
806{
807 const struct ethtool_ops *ops = dev->ethtool_ops;
808
809 if (!ops->get_eeprom || !ops->get_eeprom_len)
810 return -EOPNOTSUPP;
811
812 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
813 ops->get_eeprom_len(dev));
814}
815
816static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
817{
818 struct ethtool_eeprom eeprom;
819 const struct ethtool_ops *ops = dev->ethtool_ops;
820 void __user *userbuf = useraddr + sizeof(eeprom);
821 u32 bytes_remaining;
822 u8 *data;
823 int ret = 0;
824
825 if (!ops->set_eeprom || !ops->get_eeprom_len)
826 return -EOPNOTSUPP;
827
828 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
829 return -EFAULT;
830
831 /* Check for wrap and zero */
832 if (eeprom.offset + eeprom.len <= eeprom.offset)
833 return -EINVAL;
834
835 /* Check for exceeding total eeprom len */
836 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
837 return -EINVAL;
838
839 data = kmalloc(PAGE_SIZE, GFP_USER);
840 if (!data)
841 return -ENOMEM;
842
843 bytes_remaining = eeprom.len;
844 while (bytes_remaining > 0) {
845 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
846
847 if (copy_from_user(data, userbuf, eeprom.len)) {
848 ret = -EFAULT;
849 break;
850 }
851 ret = ops->set_eeprom(dev, &eeprom, data);
852 if (ret)
853 break;
854 userbuf += eeprom.len;
855 eeprom.offset += eeprom.len;
856 bytes_remaining -= eeprom.len;
857 }
858
859 kfree(data);
860 return ret;
861}
862
863static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
864 void __user *useraddr)
865{
866 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
867
868 if (!dev->ethtool_ops->get_coalesce)
869 return -EOPNOTSUPP;
870
871 dev->ethtool_ops->get_coalesce(dev, &coalesce);
872
873 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
874 return -EFAULT;
875 return 0;
876}
877
878static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
879 void __user *useraddr)
880{
881 struct ethtool_coalesce coalesce;
882
883 if (!dev->ethtool_ops->set_coalesce)
884 return -EOPNOTSUPP;
885
886 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
887 return -EFAULT;
888
889 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
890}
891
892static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
893{
894 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
895
896 if (!dev->ethtool_ops->get_ringparam)
897 return -EOPNOTSUPP;
898
899 dev->ethtool_ops->get_ringparam(dev, &ringparam);
900
901 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
902 return -EFAULT;
903 return 0;
904}
905
906static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
907{
908 struct ethtool_ringparam ringparam;
909
910 if (!dev->ethtool_ops->set_ringparam)
911 return -EOPNOTSUPP;
912
913 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
914 return -EFAULT;
915
916 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
917}
918
919static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
920 void __user *useraddr)
921{
922 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
923
924 if (!dev->ethtool_ops->get_channels)
925 return -EOPNOTSUPP;
926
927 dev->ethtool_ops->get_channels(dev, &channels);
928
929 if (copy_to_user(useraddr, &channels, sizeof(channels)))
930 return -EFAULT;
931 return 0;
932}
933
934static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
935 void __user *useraddr)
936{
937 struct ethtool_channels channels;
938
939 if (!dev->ethtool_ops->set_channels)
940 return -EOPNOTSUPP;
941
942 if (copy_from_user(&channels, useraddr, sizeof(channels)))
943 return -EFAULT;
944
945 return dev->ethtool_ops->set_channels(dev, &channels);
946}
947
948static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
949{
950 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
951
952 if (!dev->ethtool_ops->get_pauseparam)
953 return -EOPNOTSUPP;
954
955 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
956
957 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
958 return -EFAULT;
959 return 0;
960}
961
962static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
963{
964 struct ethtool_pauseparam pauseparam;
965
966 if (!dev->ethtool_ops->set_pauseparam)
967 return -EOPNOTSUPP;
968
969 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
970 return -EFAULT;
971
972 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
973}
974
975static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
976{
977 struct ethtool_test test;
978 const struct ethtool_ops *ops = dev->ethtool_ops;
979 u64 *data;
980 int ret, test_len;
981
982 if (!ops->self_test || !ops->get_sset_count)
983 return -EOPNOTSUPP;
984
985 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
986 if (test_len < 0)
987 return test_len;
988 WARN_ON(test_len == 0);
989
990 if (copy_from_user(&test, useraddr, sizeof(test)))
991 return -EFAULT;
992
993 test.len = test_len;
994 data = kmalloc(test_len * sizeof(u64), GFP_USER);
995 if (!data)
996 return -ENOMEM;
997
998 ops->self_test(dev, &test, data);
999
1000 ret = -EFAULT;
1001 if (copy_to_user(useraddr, &test, sizeof(test)))
1002 goto out;
1003 useraddr += sizeof(test);
1004 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1005 goto out;
1006 ret = 0;
1007
1008 out:
1009 kfree(data);
1010 return ret;
1011}
1012
1013static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1014{
1015 struct ethtool_gstrings gstrings;
1016 u8 *data;
1017 int ret;
1018
1019 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1020 return -EFAULT;
1021
1022 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1023 if (ret < 0)
1024 return ret;
1025
1026 gstrings.len = ret;
1027
1028 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1029 if (!data)
1030 return -ENOMEM;
1031
1032 __ethtool_get_strings(dev, gstrings.string_set, data);
1033
1034 ret = -EFAULT;
1035 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1036 goto out;
1037 useraddr += sizeof(gstrings);
1038 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1039 goto out;
1040 ret = 0;
1041
1042out:
1043 kfree(data);
1044 return ret;
1045}
1046
1047static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1048{
1049 struct ethtool_value id;
1050 static bool busy;
1051 int rc;
1052
1053 if (!dev->ethtool_ops->set_phys_id)
1054 return -EOPNOTSUPP;
1055
1056 if (busy)
1057 return -EBUSY;
1058
1059 if (copy_from_user(&id, useraddr, sizeof(id)))
1060 return -EFAULT;
1061
1062 rc = dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1063 if (rc < 0)
1064 return rc;
1065
1066 /* Drop the RTNL lock while waiting, but prevent reentry or
1067 * removal of the device.
1068 */
1069 busy = true;
1070 dev_hold(dev);
1071 rtnl_unlock();
1072
1073 if (rc == 0) {
1074 /* Driver will handle this itself */
1075 schedule_timeout_interruptible(
1076 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1077 } else {
1078 /* Driver expects to be called at twice the frequency in rc */
1079 int n = rc * 2, i, interval = HZ / n;
1080
1081 /* Count down seconds */
1082 do {
1083 /* Count down iterations per second */
1084 i = n;
1085 do {
1086 rtnl_lock();
1087 rc = dev->ethtool_ops->set_phys_id(dev,
1088 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1089 rtnl_unlock();
1090 if (rc)
1091 break;
1092 schedule_timeout_interruptible(interval);
1093 } while (!signal_pending(current) && --i != 0);
1094 } while (!signal_pending(current) &&
1095 (id.data == 0 || --id.data != 0));
1096 }
1097
1098 rtnl_lock();
1099 dev_put(dev);
1100 busy = false;
1101
1102 (void)dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1103 return rc;
1104}
1105
1106static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1107{
1108 struct ethtool_stats stats;
1109 const struct ethtool_ops *ops = dev->ethtool_ops;
1110 u64 *data;
1111 int ret, n_stats;
1112
1113 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1114 return -EOPNOTSUPP;
1115
1116 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1117 if (n_stats < 0)
1118 return n_stats;
1119 WARN_ON(n_stats == 0);
1120
1121 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1122 return -EFAULT;
1123
1124 stats.n_stats = n_stats;
1125 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1126 if (!data)
1127 return -ENOMEM;
1128
1129 ops->get_ethtool_stats(dev, &stats, data);
1130
1131 ret = -EFAULT;
1132 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1133 goto out;
1134 useraddr += sizeof(stats);
1135 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1136 goto out;
1137 ret = 0;
1138
1139 out:
1140 kfree(data);
1141 return ret;
1142}
1143
1144static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1145{
1146 struct ethtool_perm_addr epaddr;
1147
1148 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1149 return -EFAULT;
1150
1151 if (epaddr.size < dev->addr_len)
1152 return -ETOOSMALL;
1153 epaddr.size = dev->addr_len;
1154
1155 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1156 return -EFAULT;
1157 useraddr += sizeof(epaddr);
1158 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1159 return -EFAULT;
1160 return 0;
1161}
1162
1163static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1164 u32 cmd, u32 (*actor)(struct net_device *))
1165{
1166 struct ethtool_value edata = { .cmd = cmd };
1167
1168 if (!actor)
1169 return -EOPNOTSUPP;
1170
1171 edata.data = actor(dev);
1172
1173 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1174 return -EFAULT;
1175 return 0;
1176}
1177
1178static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1179 void (*actor)(struct net_device *, u32))
1180{
1181 struct ethtool_value edata;
1182
1183 if (!actor)
1184 return -EOPNOTSUPP;
1185
1186 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1187 return -EFAULT;
1188
1189 actor(dev, edata.data);
1190 return 0;
1191}
1192
1193static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1194 int (*actor)(struct net_device *, u32))
1195{
1196 struct ethtool_value edata;
1197
1198 if (!actor)
1199 return -EOPNOTSUPP;
1200
1201 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1202 return -EFAULT;
1203
1204 return actor(dev, edata.data);
1205}
1206
1207static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1208 char __user *useraddr)
1209{
1210 struct ethtool_flash efl;
1211
1212 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1213 return -EFAULT;
1214
1215 if (!dev->ethtool_ops->flash_device)
1216 return -EOPNOTSUPP;
1217
1218 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
1219
1220 return dev->ethtool_ops->flash_device(dev, &efl);
1221}
1222
1223static int ethtool_set_dump(struct net_device *dev,
1224 void __user *useraddr)
1225{
1226 struct ethtool_dump dump;
1227
1228 if (!dev->ethtool_ops->set_dump)
1229 return -EOPNOTSUPP;
1230
1231 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1232 return -EFAULT;
1233
1234 return dev->ethtool_ops->set_dump(dev, &dump);
1235}
1236
1237static int ethtool_get_dump_flag(struct net_device *dev,
1238 void __user *useraddr)
1239{
1240 int ret;
1241 struct ethtool_dump dump;
1242 const struct ethtool_ops *ops = dev->ethtool_ops;
1243
1244 if (!dev->ethtool_ops->get_dump_flag)
1245 return -EOPNOTSUPP;
1246
1247 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1248 return -EFAULT;
1249
1250 ret = ops->get_dump_flag(dev, &dump);
1251 if (ret)
1252 return ret;
1253
1254 if (copy_to_user(useraddr, &dump, sizeof(dump)))
1255 return -EFAULT;
1256 return 0;
1257}
1258
1259static int ethtool_get_dump_data(struct net_device *dev,
1260 void __user *useraddr)
1261{
1262 int ret;
1263 __u32 len;
1264 struct ethtool_dump dump, tmp;
1265 const struct ethtool_ops *ops = dev->ethtool_ops;
1266 void *data = NULL;
1267
1268 if (!dev->ethtool_ops->get_dump_data ||
1269 !dev->ethtool_ops->get_dump_flag)
1270 return -EOPNOTSUPP;
1271
1272 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1273 return -EFAULT;
1274
1275 memset(&tmp, 0, sizeof(tmp));
1276 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
1277 ret = ops->get_dump_flag(dev, &tmp);
1278 if (ret)
1279 return ret;
1280
1281 len = (tmp.len > dump.len) ? dump.len : tmp.len;
1282 if (!len)
1283 return -EFAULT;
1284
1285 data = vzalloc(tmp.len);
1286 if (!data)
1287 return -ENOMEM;
1288 ret = ops->get_dump_data(dev, &dump, data);
1289 if (ret)
1290 goto out;
1291
1292 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
1293 ret = -EFAULT;
1294 goto out;
1295 }
1296 useraddr += offsetof(struct ethtool_dump, data);
1297 if (copy_to_user(useraddr, data, len))
1298 ret = -EFAULT;
1299out:
1300 vfree(data);
1301 return ret;
1302}
1303
1304static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
1305{
1306 int err = 0;
1307 struct ethtool_ts_info info;
1308 const struct ethtool_ops *ops = dev->ethtool_ops;
1309 struct phy_device *phydev = dev->phydev;
1310
1311 memset(&info, 0, sizeof(info));
1312 info.cmd = ETHTOOL_GET_TS_INFO;
1313
1314 if (phydev && phydev->drv && phydev->drv->ts_info) {
1315
1316 err = phydev->drv->ts_info(phydev, &info);
1317
1318 } else if (dev->ethtool_ops && dev->ethtool_ops->get_ts_info) {
1319
1320 err = ops->get_ts_info(dev, &info);
1321
1322 } else {
1323 info.so_timestamping =
1324 SOF_TIMESTAMPING_RX_SOFTWARE |
1325 SOF_TIMESTAMPING_SOFTWARE;
1326 info.phc_index = -1;
1327 }
1328
1329 if (err)
1330 return err;
1331
1332 if (copy_to_user(useraddr, &info, sizeof(info)))
1333 err = -EFAULT;
1334
1335 return err;
1336}
1337
1338static int ethtool_get_module_info(struct net_device *dev,
1339 void __user *useraddr)
1340{
1341 int ret;
1342 struct ethtool_modinfo modinfo;
1343 const struct ethtool_ops *ops = dev->ethtool_ops;
1344
1345 if (!ops->get_module_info)
1346 return -EOPNOTSUPP;
1347
1348 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
1349 return -EFAULT;
1350
1351 ret = ops->get_module_info(dev, &modinfo);
1352 if (ret)
1353 return ret;
1354
1355 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
1356 return -EFAULT;
1357
1358 return 0;
1359}
1360
1361static int ethtool_get_module_eeprom(struct net_device *dev,
1362 void __user *useraddr)
1363{
1364 int ret;
1365 struct ethtool_modinfo modinfo;
1366 const struct ethtool_ops *ops = dev->ethtool_ops;
1367
1368 if (!ops->get_module_info || !ops->get_module_eeprom)
1369 return -EOPNOTSUPP;
1370
1371 ret = ops->get_module_info(dev, &modinfo);
1372 if (ret)
1373 return ret;
1374
1375 return ethtool_get_any_eeprom(dev, useraddr, ops->get_module_eeprom,
1376 modinfo.eeprom_len);
1377}
1378
1379/* The main entry point in this file. Called from net/core/dev.c */
1380
1381int dev_ethtool(struct net *net, struct ifreq *ifr)
1382{
1383 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1384 void __user *useraddr = ifr->ifr_data;
1385 u32 ethcmd;
1386 int rc;
1387 u32 old_features;
1388
1389 if (!dev || !netif_device_present(dev))
1390 return -ENODEV;
1391
1392 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
1393 return -EFAULT;
1394
1395 if (!dev->ethtool_ops) {
1396 /* A few commands do not require any driver support,
1397 * are unprivileged, and do not change anything, so we
1398 * can take a shortcut to them. */
1399 if (ethcmd == ETHTOOL_GDRVINFO)
1400 return ethtool_get_drvinfo(dev, useraddr);
1401 else if (ethcmd == ETHTOOL_GET_TS_INFO)
1402 return ethtool_get_ts_info(dev, useraddr);
1403 else
1404 return -EOPNOTSUPP;
1405 }
1406
1407 /* Allow some commands to be done by anyone */
1408 switch (ethcmd) {
1409 case ETHTOOL_GSET:
1410 case ETHTOOL_GDRVINFO:
1411 case ETHTOOL_GMSGLVL:
1412 case ETHTOOL_GCOALESCE:
1413 case ETHTOOL_GRINGPARAM:
1414 case ETHTOOL_GPAUSEPARAM:
1415 case ETHTOOL_GRXCSUM:
1416 case ETHTOOL_GTXCSUM:
1417 case ETHTOOL_GSG:
1418 case ETHTOOL_GSSET_INFO:
1419 case ETHTOOL_GSTRINGS:
1420 case ETHTOOL_GTSO:
1421 case ETHTOOL_GPERMADDR:
1422 case ETHTOOL_GUFO:
1423 case ETHTOOL_GGSO:
1424 case ETHTOOL_GGRO:
1425 case ETHTOOL_GFLAGS:
1426 case ETHTOOL_GPFLAGS:
1427 case ETHTOOL_GRXFH:
1428 case ETHTOOL_GRXRINGS:
1429 case ETHTOOL_GRXCLSRLCNT:
1430 case ETHTOOL_GRXCLSRULE:
1431 case ETHTOOL_GRXCLSRLALL:
1432 case ETHTOOL_GFEATURES:
1433 case ETHTOOL_GET_TS_INFO:
1434 break;
1435 default:
1436 if (!capable(CAP_NET_ADMIN))
1437 return -EPERM;
1438 }
1439
1440 if (dev->ethtool_ops->begin) {
1441 rc = dev->ethtool_ops->begin(dev);
1442 if (rc < 0)
1443 return rc;
1444 }
1445 old_features = dev->features;
1446
1447 switch (ethcmd) {
1448 case ETHTOOL_GSET:
1449 rc = ethtool_get_settings(dev, useraddr);
1450 break;
1451 case ETHTOOL_SSET:
1452 rc = ethtool_set_settings(dev, useraddr);
1453 break;
1454 case ETHTOOL_GDRVINFO:
1455 rc = ethtool_get_drvinfo(dev, useraddr);
1456 break;
1457 case ETHTOOL_GREGS:
1458 rc = ethtool_get_regs(dev, useraddr);
1459 break;
1460 case ETHTOOL_GWOL:
1461 rc = ethtool_get_wol(dev, useraddr);
1462 break;
1463 case ETHTOOL_SWOL:
1464 rc = ethtool_set_wol(dev, useraddr);
1465 break;
1466 case ETHTOOL_GMSGLVL:
1467 rc = ethtool_get_value(dev, useraddr, ethcmd,
1468 dev->ethtool_ops->get_msglevel);
1469 break;
1470 case ETHTOOL_SMSGLVL:
1471 rc = ethtool_set_value_void(dev, useraddr,
1472 dev->ethtool_ops->set_msglevel);
1473 break;
1474 case ETHTOOL_NWAY_RST:
1475 rc = ethtool_nway_reset(dev);
1476 break;
1477 case ETHTOOL_GLINK:
1478 rc = ethtool_get_link(dev, useraddr);
1479 break;
1480 case ETHTOOL_GEEPROM:
1481 rc = ethtool_get_eeprom(dev, useraddr);
1482 break;
1483 case ETHTOOL_SEEPROM:
1484 rc = ethtool_set_eeprom(dev, useraddr);
1485 break;
1486 case ETHTOOL_GCOALESCE:
1487 rc = ethtool_get_coalesce(dev, useraddr);
1488 break;
1489 case ETHTOOL_SCOALESCE:
1490 rc = ethtool_set_coalesce(dev, useraddr);
1491 break;
1492 case ETHTOOL_GRINGPARAM:
1493 rc = ethtool_get_ringparam(dev, useraddr);
1494 break;
1495 case ETHTOOL_SRINGPARAM:
1496 rc = ethtool_set_ringparam(dev, useraddr);
1497 break;
1498 case ETHTOOL_GPAUSEPARAM:
1499 rc = ethtool_get_pauseparam(dev, useraddr);
1500 break;
1501 case ETHTOOL_SPAUSEPARAM:
1502 rc = ethtool_set_pauseparam(dev, useraddr);
1503 break;
1504 case ETHTOOL_TEST:
1505 rc = ethtool_self_test(dev, useraddr);
1506 break;
1507 case ETHTOOL_GSTRINGS:
1508 rc = ethtool_get_strings(dev, useraddr);
1509 break;
1510 case ETHTOOL_PHYS_ID:
1511 rc = ethtool_phys_id(dev, useraddr);
1512 break;
1513 case ETHTOOL_GSTATS:
1514 rc = ethtool_get_stats(dev, useraddr);
1515 break;
1516 case ETHTOOL_GPERMADDR:
1517 rc = ethtool_get_perm_addr(dev, useraddr);
1518 break;
1519 case ETHTOOL_GFLAGS:
1520 rc = ethtool_get_value(dev, useraddr, ethcmd,
1521 __ethtool_get_flags);
1522 break;
1523 case ETHTOOL_SFLAGS:
1524 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
1525 break;
1526 case ETHTOOL_GPFLAGS:
1527 rc = ethtool_get_value(dev, useraddr, ethcmd,
1528 dev->ethtool_ops->get_priv_flags);
1529 break;
1530 case ETHTOOL_SPFLAGS:
1531 rc = ethtool_set_value(dev, useraddr,
1532 dev->ethtool_ops->set_priv_flags);
1533 break;
1534 case ETHTOOL_GRXFH:
1535 case ETHTOOL_GRXRINGS:
1536 case ETHTOOL_GRXCLSRLCNT:
1537 case ETHTOOL_GRXCLSRULE:
1538 case ETHTOOL_GRXCLSRLALL:
1539 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1540 break;
1541 case ETHTOOL_SRXFH:
1542 case ETHTOOL_SRXCLSRLDEL:
1543 case ETHTOOL_SRXCLSRLINS:
1544 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1545 break;
1546 case ETHTOOL_FLASHDEV:
1547 rc = ethtool_flash_device(dev, useraddr);
1548 break;
1549 case ETHTOOL_RESET:
1550 rc = ethtool_reset(dev, useraddr);
1551 break;
1552 case ETHTOOL_GSSET_INFO:
1553 rc = ethtool_get_sset_info(dev, useraddr);
1554 break;
1555 case ETHTOOL_GRXFHINDIR:
1556 rc = ethtool_get_rxfh_indir(dev, useraddr);
1557 break;
1558 case ETHTOOL_SRXFHINDIR:
1559 rc = ethtool_set_rxfh_indir(dev, useraddr);
1560 break;
1561 case ETHTOOL_GFEATURES:
1562 rc = ethtool_get_features(dev, useraddr);
1563 break;
1564 case ETHTOOL_SFEATURES:
1565 rc = ethtool_set_features(dev, useraddr);
1566 break;
1567 case ETHTOOL_GTXCSUM:
1568 case ETHTOOL_GRXCSUM:
1569 case ETHTOOL_GSG:
1570 case ETHTOOL_GTSO:
1571 case ETHTOOL_GUFO:
1572 case ETHTOOL_GGSO:
1573 case ETHTOOL_GGRO:
1574 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
1575 break;
1576 case ETHTOOL_STXCSUM:
1577 case ETHTOOL_SRXCSUM:
1578 case ETHTOOL_SSG:
1579 case ETHTOOL_STSO:
1580 case ETHTOOL_SUFO:
1581 case ETHTOOL_SGSO:
1582 case ETHTOOL_SGRO:
1583 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
1584 break;
1585 case ETHTOOL_GCHANNELS:
1586 rc = ethtool_get_channels(dev, useraddr);
1587 break;
1588 case ETHTOOL_SCHANNELS:
1589 rc = ethtool_set_channels(dev, useraddr);
1590 break;
1591 case ETHTOOL_SET_DUMP:
1592 rc = ethtool_set_dump(dev, useraddr);
1593 break;
1594 case ETHTOOL_GET_DUMP_FLAG:
1595 rc = ethtool_get_dump_flag(dev, useraddr);
1596 break;
1597 case ETHTOOL_GET_DUMP_DATA:
1598 rc = ethtool_get_dump_data(dev, useraddr);
1599 break;
1600 case ETHTOOL_GET_TS_INFO:
1601 rc = ethtool_get_ts_info(dev, useraddr);
1602 break;
1603 case ETHTOOL_GMODULEINFO:
1604 rc = ethtool_get_module_info(dev, useraddr);
1605 break;
1606 case ETHTOOL_GMODULEEEPROM:
1607 rc = ethtool_get_module_eeprom(dev, useraddr);
1608 break;
1609 default:
1610 rc = -EOPNOTSUPP;
1611 }
1612
1613 if (dev->ethtool_ops->complete)
1614 dev->ethtool_ops->complete(dev);
1615
1616 if (old_features != dev->features)
1617 netdev_features_change(dev);
1618
1619 return rc;
1620}