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[mirror_ubuntu-artful-kernel.git] / net / core / ethtool.c
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/bitops.h>
21 #include <linux/uaccess.h>
22 #include <linux/vmalloc.h>
23 #include <linux/slab.h>
24
25 /*
26 * Some useful ethtool_ops methods that're device independent.
27 * If we find that all drivers want to do the same thing here,
28 * we can turn these into dev_() function calls.
29 */
30
31 u32 ethtool_op_get_link(struct net_device *dev)
32 {
33 return netif_carrier_ok(dev) ? 1 : 0;
34 }
35 EXPORT_SYMBOL(ethtool_op_get_link);
36
37 u32 ethtool_op_get_tx_csum(struct net_device *dev)
38 {
39 return (dev->features & NETIF_F_ALL_CSUM) != 0;
40 }
41 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
42
43 int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
44 {
45 if (data)
46 dev->features |= NETIF_F_IP_CSUM;
47 else
48 dev->features &= ~NETIF_F_IP_CSUM;
49
50 return 0;
51 }
52 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
53
54 int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
55 {
56 if (data)
57 dev->features |= NETIF_F_HW_CSUM;
58 else
59 dev->features &= ~NETIF_F_HW_CSUM;
60
61 return 0;
62 }
63 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
64
65 int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
66 {
67 if (data)
68 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
69 else
70 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
71
72 return 0;
73 }
74 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
75
76 u32 ethtool_op_get_sg(struct net_device *dev)
77 {
78 return (dev->features & NETIF_F_SG) != 0;
79 }
80 EXPORT_SYMBOL(ethtool_op_get_sg);
81
82 int ethtool_op_set_sg(struct net_device *dev, u32 data)
83 {
84 if (data)
85 dev->features |= NETIF_F_SG;
86 else
87 dev->features &= ~NETIF_F_SG;
88
89 return 0;
90 }
91 EXPORT_SYMBOL(ethtool_op_set_sg);
92
93 u32 ethtool_op_get_tso(struct net_device *dev)
94 {
95 return (dev->features & NETIF_F_TSO) != 0;
96 }
97 EXPORT_SYMBOL(ethtool_op_get_tso);
98
99 int ethtool_op_set_tso(struct net_device *dev, u32 data)
100 {
101 if (data)
102 dev->features |= NETIF_F_TSO;
103 else
104 dev->features &= ~NETIF_F_TSO;
105
106 return 0;
107 }
108 EXPORT_SYMBOL(ethtool_op_set_tso);
109
110 u32 ethtool_op_get_ufo(struct net_device *dev)
111 {
112 return (dev->features & NETIF_F_UFO) != 0;
113 }
114 EXPORT_SYMBOL(ethtool_op_get_ufo);
115
116 int ethtool_op_set_ufo(struct net_device *dev, u32 data)
117 {
118 if (data)
119 dev->features |= NETIF_F_UFO;
120 else
121 dev->features &= ~NETIF_F_UFO;
122 return 0;
123 }
124 EXPORT_SYMBOL(ethtool_op_set_ufo);
125
126 /* the following list of flags are the same as their associated
127 * NETIF_F_xxx values in include/linux/netdevice.h
128 */
129 static const u32 flags_dup_features =
130 (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | ETH_FLAG_NTUPLE |
131 ETH_FLAG_RXHASH);
132
133 u32 ethtool_op_get_flags(struct net_device *dev)
134 {
135 /* in the future, this function will probably contain additional
136 * handling for flags which are not so easily handled
137 * by a simple masking operation
138 */
139
140 return dev->features & flags_dup_features;
141 }
142 EXPORT_SYMBOL(ethtool_op_get_flags);
143
144 /* Check if device can enable (or disable) particular feature coded in "data"
145 * argument. Flags "supported" describe features that can be toggled by device.
146 * If feature can not be toggled, it state (enabled or disabled) must match
147 * hardcoded device features state, otherwise flags are marked as invalid.
148 */
149 bool ethtool_invalid_flags(struct net_device *dev, u32 data, u32 supported)
150 {
151 u32 features = dev->features & flags_dup_features;
152 /* "data" can contain only flags_dup_features bits,
153 * see __ethtool_set_flags */
154
155 return (features & ~supported) != (data & ~supported);
156 }
157 EXPORT_SYMBOL(ethtool_invalid_flags);
158
159 int ethtool_op_set_flags(struct net_device *dev, u32 data, u32 supported)
160 {
161 if (ethtool_invalid_flags(dev, data, supported))
162 return -EINVAL;
163
164 dev->features = ((dev->features & ~flags_dup_features) |
165 (data & flags_dup_features));
166 return 0;
167 }
168 EXPORT_SYMBOL(ethtool_op_set_flags);
169
170 void ethtool_ntuple_flush(struct net_device *dev)
171 {
172 struct ethtool_rx_ntuple_flow_spec_container *fsc, *f;
173
174 list_for_each_entry_safe(fsc, f, &dev->ethtool_ntuple_list.list, list) {
175 list_del(&fsc->list);
176 kfree(fsc);
177 }
178 dev->ethtool_ntuple_list.count = 0;
179 }
180 EXPORT_SYMBOL(ethtool_ntuple_flush);
181
182 /* Handlers for each ethtool command */
183
184 #define ETHTOOL_DEV_FEATURE_WORDS 1
185
186 static void ethtool_get_features_compat(struct net_device *dev,
187 struct ethtool_get_features_block *features)
188 {
189 if (!dev->ethtool_ops)
190 return;
191
192 /* getting RX checksum */
193 if (dev->ethtool_ops->get_rx_csum)
194 if (dev->ethtool_ops->get_rx_csum(dev))
195 features[0].active |= NETIF_F_RXCSUM;
196
197 /* mark legacy-changeable features */
198 if (dev->ethtool_ops->set_sg)
199 features[0].available |= NETIF_F_SG;
200 if (dev->ethtool_ops->set_tx_csum)
201 features[0].available |= NETIF_F_ALL_CSUM;
202 if (dev->ethtool_ops->set_tso)
203 features[0].available |= NETIF_F_ALL_TSO;
204 if (dev->ethtool_ops->set_rx_csum)
205 features[0].available |= NETIF_F_RXCSUM;
206 if (dev->ethtool_ops->set_flags)
207 features[0].available |= flags_dup_features;
208 }
209
210 static int ethtool_set_feature_compat(struct net_device *dev,
211 int (*legacy_set)(struct net_device *, u32),
212 struct ethtool_set_features_block *features, u32 mask)
213 {
214 u32 do_set;
215
216 if (!legacy_set)
217 return 0;
218
219 if (!(features[0].valid & mask))
220 return 0;
221
222 features[0].valid &= ~mask;
223
224 do_set = !!(features[0].requested & mask);
225
226 if (legacy_set(dev, do_set) < 0)
227 netdev_info(dev,
228 "Legacy feature change (%s) failed for 0x%08x\n",
229 do_set ? "set" : "clear", mask);
230
231 return 1;
232 }
233
234 static int ethtool_set_features_compat(struct net_device *dev,
235 struct ethtool_set_features_block *features)
236 {
237 int compat;
238
239 if (!dev->ethtool_ops)
240 return 0;
241
242 compat = ethtool_set_feature_compat(dev, dev->ethtool_ops->set_sg,
243 features, NETIF_F_SG);
244 compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_tx_csum,
245 features, NETIF_F_ALL_CSUM);
246 compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_tso,
247 features, NETIF_F_ALL_TSO);
248 compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_rx_csum,
249 features, NETIF_F_RXCSUM);
250 compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_flags,
251 features, flags_dup_features);
252
253 return compat;
254 }
255
256 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
257 {
258 struct ethtool_gfeatures cmd = {
259 .cmd = ETHTOOL_GFEATURES,
260 .size = ETHTOOL_DEV_FEATURE_WORDS,
261 };
262 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS] = {
263 {
264 .available = dev->hw_features,
265 .requested = dev->wanted_features,
266 .active = dev->features,
267 .never_changed = NETIF_F_NEVER_CHANGE,
268 },
269 };
270 u32 __user *sizeaddr;
271 u32 copy_size;
272
273 ethtool_get_features_compat(dev, features);
274
275 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
276 if (get_user(copy_size, sizeaddr))
277 return -EFAULT;
278
279 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
280 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
281
282 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
283 return -EFAULT;
284 useraddr += sizeof(cmd);
285 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
286 return -EFAULT;
287
288 return 0;
289 }
290
291 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
292 {
293 struct ethtool_sfeatures cmd;
294 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
295 int ret = 0;
296
297 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
298 return -EFAULT;
299 useraddr += sizeof(cmd);
300
301 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
302 return -EINVAL;
303
304 if (copy_from_user(features, useraddr, sizeof(features)))
305 return -EFAULT;
306
307 if (features[0].valid & ~NETIF_F_ETHTOOL_BITS)
308 return -EINVAL;
309
310 if (ethtool_set_features_compat(dev, features))
311 ret |= ETHTOOL_F_COMPAT;
312
313 if (features[0].valid & ~dev->hw_features) {
314 features[0].valid &= dev->hw_features;
315 ret |= ETHTOOL_F_UNSUPPORTED;
316 }
317
318 dev->wanted_features &= ~features[0].valid;
319 dev->wanted_features |= features[0].valid & features[0].requested;
320 netdev_update_features(dev);
321
322 if ((dev->wanted_features ^ dev->features) & features[0].valid)
323 ret |= ETHTOOL_F_WISH;
324
325 return ret;
326 }
327
328 static const char netdev_features_strings[ETHTOOL_DEV_FEATURE_WORDS * 32][ETH_GSTRING_LEN] = {
329 /* NETIF_F_SG */ "tx-scatter-gather",
330 /* NETIF_F_IP_CSUM */ "tx-checksum-ipv4",
331 /* NETIF_F_NO_CSUM */ "tx-checksum-unneeded",
332 /* NETIF_F_HW_CSUM */ "tx-checksum-ip-generic",
333 /* NETIF_F_IPV6_CSUM */ "tx_checksum-ipv6",
334 /* NETIF_F_HIGHDMA */ "highdma",
335 /* NETIF_F_FRAGLIST */ "tx-scatter-gather-fraglist",
336 /* NETIF_F_HW_VLAN_TX */ "tx-vlan-hw-insert",
337
338 /* NETIF_F_HW_VLAN_RX */ "rx-vlan-hw-parse",
339 /* NETIF_F_HW_VLAN_FILTER */ "rx-vlan-filter",
340 /* NETIF_F_VLAN_CHALLENGED */ "vlan-challenged",
341 /* NETIF_F_GSO */ "tx-generic-segmentation",
342 /* NETIF_F_LLTX */ "tx-lockless",
343 /* NETIF_F_NETNS_LOCAL */ "netns-local",
344 /* NETIF_F_GRO */ "rx-gro",
345 /* NETIF_F_LRO */ "rx-lro",
346
347 /* NETIF_F_TSO */ "tx-tcp-segmentation",
348 /* NETIF_F_UFO */ "tx-udp-fragmentation",
349 /* NETIF_F_GSO_ROBUST */ "tx-gso-robust",
350 /* NETIF_F_TSO_ECN */ "tx-tcp-ecn-segmentation",
351 /* NETIF_F_TSO6 */ "tx-tcp6-segmentation",
352 /* NETIF_F_FSO */ "tx-fcoe-segmentation",
353 "",
354 "",
355
356 /* NETIF_F_FCOE_CRC */ "tx-checksum-fcoe-crc",
357 /* NETIF_F_SCTP_CSUM */ "tx-checksum-sctp",
358 /* NETIF_F_FCOE_MTU */ "fcoe-mtu",
359 /* NETIF_F_NTUPLE */ "rx-ntuple-filter",
360 /* NETIF_F_RXHASH */ "rx-hashing",
361 /* NETIF_F_RXCSUM */ "rx-checksum",
362 "",
363 "",
364 };
365
366 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
367 {
368 const struct ethtool_ops *ops = dev->ethtool_ops;
369
370 if (sset == ETH_SS_FEATURES)
371 return ARRAY_SIZE(netdev_features_strings);
372
373 if (ops && ops->get_sset_count && ops->get_strings)
374 return ops->get_sset_count(dev, sset);
375 else
376 return -EOPNOTSUPP;
377 }
378
379 static void __ethtool_get_strings(struct net_device *dev,
380 u32 stringset, u8 *data)
381 {
382 const struct ethtool_ops *ops = dev->ethtool_ops;
383
384 if (stringset == ETH_SS_FEATURES)
385 memcpy(data, netdev_features_strings,
386 sizeof(netdev_features_strings));
387 else
388 /* ops->get_strings is valid because checked earlier */
389 ops->get_strings(dev, stringset, data);
390 }
391
392 static u32 ethtool_get_feature_mask(u32 eth_cmd)
393 {
394 /* feature masks of legacy discrete ethtool ops */
395
396 switch (eth_cmd) {
397 case ETHTOOL_GTXCSUM:
398 case ETHTOOL_STXCSUM:
399 return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM;
400 case ETHTOOL_GRXCSUM:
401 case ETHTOOL_SRXCSUM:
402 return NETIF_F_RXCSUM;
403 case ETHTOOL_GSG:
404 case ETHTOOL_SSG:
405 return NETIF_F_SG;
406 case ETHTOOL_GTSO:
407 case ETHTOOL_STSO:
408 return NETIF_F_ALL_TSO;
409 case ETHTOOL_GUFO:
410 case ETHTOOL_SUFO:
411 return NETIF_F_UFO;
412 case ETHTOOL_GGSO:
413 case ETHTOOL_SGSO:
414 return NETIF_F_GSO;
415 case ETHTOOL_GGRO:
416 case ETHTOOL_SGRO:
417 return NETIF_F_GRO;
418 default:
419 BUG();
420 }
421 }
422
423 static void *__ethtool_get_one_feature_actor(struct net_device *dev, u32 ethcmd)
424 {
425 const struct ethtool_ops *ops = dev->ethtool_ops;
426
427 if (!ops)
428 return NULL;
429
430 switch (ethcmd) {
431 case ETHTOOL_GTXCSUM:
432 return ops->get_tx_csum;
433 case ETHTOOL_GRXCSUM:
434 return ops->get_rx_csum;
435 case ETHTOOL_SSG:
436 return ops->get_sg;
437 case ETHTOOL_STSO:
438 return ops->get_tso;
439 case ETHTOOL_SUFO:
440 return ops->get_ufo;
441 default:
442 return NULL;
443 }
444 }
445
446 static u32 __ethtool_get_rx_csum_oldbug(struct net_device *dev)
447 {
448 return !!(dev->features & NETIF_F_ALL_CSUM);
449 }
450
451 static int ethtool_get_one_feature(struct net_device *dev,
452 char __user *useraddr, u32 ethcmd)
453 {
454 u32 mask = ethtool_get_feature_mask(ethcmd);
455 struct ethtool_value edata = {
456 .cmd = ethcmd,
457 .data = !!(dev->features & mask),
458 };
459
460 /* compatibility with discrete get_ ops */
461 if (!(dev->hw_features & mask)) {
462 u32 (*actor)(struct net_device *);
463
464 actor = __ethtool_get_one_feature_actor(dev, ethcmd);
465
466 /* bug compatibility with old get_rx_csum */
467 if (ethcmd == ETHTOOL_GRXCSUM && !actor)
468 actor = __ethtool_get_rx_csum_oldbug;
469
470 if (actor)
471 edata.data = actor(dev);
472 }
473
474 if (copy_to_user(useraddr, &edata, sizeof(edata)))
475 return -EFAULT;
476 return 0;
477 }
478
479 static int __ethtool_set_tx_csum(struct net_device *dev, u32 data);
480 static int __ethtool_set_rx_csum(struct net_device *dev, u32 data);
481 static int __ethtool_set_sg(struct net_device *dev, u32 data);
482 static int __ethtool_set_tso(struct net_device *dev, u32 data);
483 static int __ethtool_set_ufo(struct net_device *dev, u32 data);
484
485 static int ethtool_set_one_feature(struct net_device *dev,
486 void __user *useraddr, u32 ethcmd)
487 {
488 struct ethtool_value edata;
489 u32 mask;
490
491 if (copy_from_user(&edata, useraddr, sizeof(edata)))
492 return -EFAULT;
493
494 mask = ethtool_get_feature_mask(ethcmd);
495 mask &= dev->hw_features;
496 if (mask) {
497 if (edata.data)
498 dev->wanted_features |= mask;
499 else
500 dev->wanted_features &= ~mask;
501
502 netdev_update_features(dev);
503 return 0;
504 }
505
506 /* Driver is not converted to ndo_fix_features or does not
507 * support changing this offload. In the latter case it won't
508 * have corresponding ethtool_ops field set.
509 *
510 * Following part is to be removed after all drivers advertise
511 * their changeable features in netdev->hw_features and stop
512 * using discrete offload setting ops.
513 */
514
515 switch (ethcmd) {
516 case ETHTOOL_STXCSUM:
517 return __ethtool_set_tx_csum(dev, edata.data);
518 case ETHTOOL_SRXCSUM:
519 return __ethtool_set_rx_csum(dev, edata.data);
520 case ETHTOOL_SSG:
521 return __ethtool_set_sg(dev, edata.data);
522 case ETHTOOL_STSO:
523 return __ethtool_set_tso(dev, edata.data);
524 case ETHTOOL_SUFO:
525 return __ethtool_set_ufo(dev, edata.data);
526 default:
527 return -EOPNOTSUPP;
528 }
529 }
530
531 int __ethtool_set_flags(struct net_device *dev, u32 data)
532 {
533 u32 changed;
534
535 if (data & ~flags_dup_features)
536 return -EINVAL;
537
538 /* legacy set_flags() op */
539 if (dev->ethtool_ops->set_flags) {
540 if (unlikely(dev->hw_features & flags_dup_features))
541 netdev_warn(dev,
542 "driver BUG: mixed hw_features and set_flags()\n");
543 return dev->ethtool_ops->set_flags(dev, data);
544 }
545
546 /* allow changing only bits set in hw_features */
547 changed = (data ^ dev->wanted_features) & flags_dup_features;
548 if (changed & ~dev->hw_features)
549 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
550
551 dev->wanted_features =
552 (dev->wanted_features & ~changed) | data;
553
554 netdev_update_features(dev);
555
556 return 0;
557 }
558
559 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
560 {
561 struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET };
562 int err;
563
564 if (!dev->ethtool_ops->get_settings)
565 return -EOPNOTSUPP;
566
567 err = dev->ethtool_ops->get_settings(dev, &cmd);
568 if (err < 0)
569 return err;
570
571 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
572 return -EFAULT;
573 return 0;
574 }
575
576 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
577 {
578 struct ethtool_cmd cmd;
579
580 if (!dev->ethtool_ops->set_settings)
581 return -EOPNOTSUPP;
582
583 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
584 return -EFAULT;
585
586 return dev->ethtool_ops->set_settings(dev, &cmd);
587 }
588
589 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
590 void __user *useraddr)
591 {
592 struct ethtool_drvinfo info;
593 const struct ethtool_ops *ops = dev->ethtool_ops;
594
595 memset(&info, 0, sizeof(info));
596 info.cmd = ETHTOOL_GDRVINFO;
597 if (ops && ops->get_drvinfo) {
598 ops->get_drvinfo(dev, &info);
599 } else if (dev->dev.parent && dev->dev.parent->driver) {
600 strlcpy(info.bus_info, dev_name(dev->dev.parent),
601 sizeof(info.bus_info));
602 strlcpy(info.driver, dev->dev.parent->driver->name,
603 sizeof(info.driver));
604 } else {
605 return -EOPNOTSUPP;
606 }
607
608 /*
609 * this method of obtaining string set info is deprecated;
610 * Use ETHTOOL_GSSET_INFO instead.
611 */
612 if (ops && ops->get_sset_count) {
613 int rc;
614
615 rc = ops->get_sset_count(dev, ETH_SS_TEST);
616 if (rc >= 0)
617 info.testinfo_len = rc;
618 rc = ops->get_sset_count(dev, ETH_SS_STATS);
619 if (rc >= 0)
620 info.n_stats = rc;
621 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
622 if (rc >= 0)
623 info.n_priv_flags = rc;
624 }
625 if (ops && ops->get_regs_len)
626 info.regdump_len = ops->get_regs_len(dev);
627 if (ops && ops->get_eeprom_len)
628 info.eedump_len = ops->get_eeprom_len(dev);
629
630 if (copy_to_user(useraddr, &info, sizeof(info)))
631 return -EFAULT;
632 return 0;
633 }
634
635 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
636 void __user *useraddr)
637 {
638 struct ethtool_sset_info info;
639 u64 sset_mask;
640 int i, idx = 0, n_bits = 0, ret, rc;
641 u32 *info_buf = NULL;
642
643 if (copy_from_user(&info, useraddr, sizeof(info)))
644 return -EFAULT;
645
646 /* store copy of mask, because we zero struct later on */
647 sset_mask = info.sset_mask;
648 if (!sset_mask)
649 return 0;
650
651 /* calculate size of return buffer */
652 n_bits = hweight64(sset_mask);
653
654 memset(&info, 0, sizeof(info));
655 info.cmd = ETHTOOL_GSSET_INFO;
656
657 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
658 if (!info_buf)
659 return -ENOMEM;
660
661 /*
662 * fill return buffer based on input bitmask and successful
663 * get_sset_count return
664 */
665 for (i = 0; i < 64; i++) {
666 if (!(sset_mask & (1ULL << i)))
667 continue;
668
669 rc = __ethtool_get_sset_count(dev, i);
670 if (rc >= 0) {
671 info.sset_mask |= (1ULL << i);
672 info_buf[idx++] = rc;
673 }
674 }
675
676 ret = -EFAULT;
677 if (copy_to_user(useraddr, &info, sizeof(info)))
678 goto out;
679
680 useraddr += offsetof(struct ethtool_sset_info, data);
681 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
682 goto out;
683
684 ret = 0;
685
686 out:
687 kfree(info_buf);
688 return ret;
689 }
690
691 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
692 u32 cmd, void __user *useraddr)
693 {
694 struct ethtool_rxnfc info;
695 size_t info_size = sizeof(info);
696
697 if (!dev->ethtool_ops->set_rxnfc)
698 return -EOPNOTSUPP;
699
700 /* struct ethtool_rxnfc was originally defined for
701 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
702 * members. User-space might still be using that
703 * definition. */
704 if (cmd == ETHTOOL_SRXFH)
705 info_size = (offsetof(struct ethtool_rxnfc, data) +
706 sizeof(info.data));
707
708 if (copy_from_user(&info, useraddr, info_size))
709 return -EFAULT;
710
711 return dev->ethtool_ops->set_rxnfc(dev, &info);
712 }
713
714 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
715 u32 cmd, void __user *useraddr)
716 {
717 struct ethtool_rxnfc info;
718 size_t info_size = sizeof(info);
719 const struct ethtool_ops *ops = dev->ethtool_ops;
720 int ret;
721 void *rule_buf = NULL;
722
723 if (!ops->get_rxnfc)
724 return -EOPNOTSUPP;
725
726 /* struct ethtool_rxnfc was originally defined for
727 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
728 * members. User-space might still be using that
729 * definition. */
730 if (cmd == ETHTOOL_GRXFH)
731 info_size = (offsetof(struct ethtool_rxnfc, data) +
732 sizeof(info.data));
733
734 if (copy_from_user(&info, useraddr, info_size))
735 return -EFAULT;
736
737 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
738 if (info.rule_cnt > 0) {
739 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
740 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
741 GFP_USER);
742 if (!rule_buf)
743 return -ENOMEM;
744 }
745 }
746
747 ret = ops->get_rxnfc(dev, &info, rule_buf);
748 if (ret < 0)
749 goto err_out;
750
751 ret = -EFAULT;
752 if (copy_to_user(useraddr, &info, info_size))
753 goto err_out;
754
755 if (rule_buf) {
756 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
757 if (copy_to_user(useraddr, rule_buf,
758 info.rule_cnt * sizeof(u32)))
759 goto err_out;
760 }
761 ret = 0;
762
763 err_out:
764 kfree(rule_buf);
765
766 return ret;
767 }
768
769 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
770 void __user *useraddr)
771 {
772 struct ethtool_rxfh_indir *indir;
773 u32 table_size;
774 size_t full_size;
775 int ret;
776
777 if (!dev->ethtool_ops->get_rxfh_indir)
778 return -EOPNOTSUPP;
779
780 if (copy_from_user(&table_size,
781 useraddr + offsetof(struct ethtool_rxfh_indir, size),
782 sizeof(table_size)))
783 return -EFAULT;
784
785 if (table_size >
786 (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
787 return -ENOMEM;
788 full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
789 indir = kzalloc(full_size, GFP_USER);
790 if (!indir)
791 return -ENOMEM;
792
793 indir->cmd = ETHTOOL_GRXFHINDIR;
794 indir->size = table_size;
795 ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
796 if (ret)
797 goto out;
798
799 if (copy_to_user(useraddr, indir, full_size))
800 ret = -EFAULT;
801
802 out:
803 kfree(indir);
804 return ret;
805 }
806
807 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
808 void __user *useraddr)
809 {
810 struct ethtool_rxfh_indir *indir;
811 u32 table_size;
812 size_t full_size;
813 int ret;
814
815 if (!dev->ethtool_ops->set_rxfh_indir)
816 return -EOPNOTSUPP;
817
818 if (copy_from_user(&table_size,
819 useraddr + offsetof(struct ethtool_rxfh_indir, size),
820 sizeof(table_size)))
821 return -EFAULT;
822
823 if (table_size >
824 (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
825 return -ENOMEM;
826 full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
827 indir = kmalloc(full_size, GFP_USER);
828 if (!indir)
829 return -ENOMEM;
830
831 if (copy_from_user(indir, useraddr, full_size)) {
832 ret = -EFAULT;
833 goto out;
834 }
835
836 ret = dev->ethtool_ops->set_rxfh_indir(dev, indir);
837
838 out:
839 kfree(indir);
840 return ret;
841 }
842
843 static void __rx_ntuple_filter_add(struct ethtool_rx_ntuple_list *list,
844 struct ethtool_rx_ntuple_flow_spec *spec,
845 struct ethtool_rx_ntuple_flow_spec_container *fsc)
846 {
847
848 /* don't add filters forever */
849 if (list->count >= ETHTOOL_MAX_NTUPLE_LIST_ENTRY) {
850 /* free the container */
851 kfree(fsc);
852 return;
853 }
854
855 /* Copy the whole filter over */
856 fsc->fs.flow_type = spec->flow_type;
857 memcpy(&fsc->fs.h_u, &spec->h_u, sizeof(spec->h_u));
858 memcpy(&fsc->fs.m_u, &spec->m_u, sizeof(spec->m_u));
859
860 fsc->fs.vlan_tag = spec->vlan_tag;
861 fsc->fs.vlan_tag_mask = spec->vlan_tag_mask;
862 fsc->fs.data = spec->data;
863 fsc->fs.data_mask = spec->data_mask;
864 fsc->fs.action = spec->action;
865
866 /* add to the list */
867 list_add_tail_rcu(&fsc->list, &list->list);
868 list->count++;
869 }
870
871 /*
872 * ethtool does not (or did not) set masks for flow parameters that are
873 * not specified, so if both value and mask are 0 then this must be
874 * treated as equivalent to a mask with all bits set. Implement that
875 * here rather than in drivers.
876 */
877 static void rx_ntuple_fix_masks(struct ethtool_rx_ntuple_flow_spec *fs)
878 {
879 struct ethtool_tcpip4_spec *entry = &fs->h_u.tcp_ip4_spec;
880 struct ethtool_tcpip4_spec *mask = &fs->m_u.tcp_ip4_spec;
881
882 if (fs->flow_type != TCP_V4_FLOW &&
883 fs->flow_type != UDP_V4_FLOW &&
884 fs->flow_type != SCTP_V4_FLOW)
885 return;
886
887 if (!(entry->ip4src | mask->ip4src))
888 mask->ip4src = htonl(0xffffffff);
889 if (!(entry->ip4dst | mask->ip4dst))
890 mask->ip4dst = htonl(0xffffffff);
891 if (!(entry->psrc | mask->psrc))
892 mask->psrc = htons(0xffff);
893 if (!(entry->pdst | mask->pdst))
894 mask->pdst = htons(0xffff);
895 if (!(entry->tos | mask->tos))
896 mask->tos = 0xff;
897 if (!(fs->vlan_tag | fs->vlan_tag_mask))
898 fs->vlan_tag_mask = 0xffff;
899 if (!(fs->data | fs->data_mask))
900 fs->data_mask = 0xffffffffffffffffULL;
901 }
902
903 static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev,
904 void __user *useraddr)
905 {
906 struct ethtool_rx_ntuple cmd;
907 const struct ethtool_ops *ops = dev->ethtool_ops;
908 struct ethtool_rx_ntuple_flow_spec_container *fsc = NULL;
909 int ret;
910
911 if (!(dev->features & NETIF_F_NTUPLE))
912 return -EINVAL;
913
914 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
915 return -EFAULT;
916
917 rx_ntuple_fix_masks(&cmd.fs);
918
919 /*
920 * Cache filter in dev struct for GET operation only if
921 * the underlying driver doesn't have its own GET operation, and
922 * only if the filter was added successfully. First make sure we
923 * can allocate the filter, then continue if successful.
924 */
925 if (!ops->get_rx_ntuple) {
926 fsc = kmalloc(sizeof(*fsc), GFP_ATOMIC);
927 if (!fsc)
928 return -ENOMEM;
929 }
930
931 ret = ops->set_rx_ntuple(dev, &cmd);
932 if (ret) {
933 kfree(fsc);
934 return ret;
935 }
936
937 if (!ops->get_rx_ntuple)
938 __rx_ntuple_filter_add(&dev->ethtool_ntuple_list, &cmd.fs, fsc);
939
940 return ret;
941 }
942
943 static int ethtool_get_rx_ntuple(struct net_device *dev, void __user *useraddr)
944 {
945 struct ethtool_gstrings gstrings;
946 const struct ethtool_ops *ops = dev->ethtool_ops;
947 struct ethtool_rx_ntuple_flow_spec_container *fsc;
948 u8 *data;
949 char *p;
950 int ret, i, num_strings = 0;
951
952 if (!ops->get_sset_count)
953 return -EOPNOTSUPP;
954
955 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
956 return -EFAULT;
957
958 ret = ops->get_sset_count(dev, gstrings.string_set);
959 if (ret < 0)
960 return ret;
961
962 gstrings.len = ret;
963
964 data = kzalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
965 if (!data)
966 return -ENOMEM;
967
968 if (ops->get_rx_ntuple) {
969 /* driver-specific filter grab */
970 ret = ops->get_rx_ntuple(dev, gstrings.string_set, data);
971 goto copy;
972 }
973
974 /* default ethtool filter grab */
975 i = 0;
976 p = (char *)data;
977 list_for_each_entry(fsc, &dev->ethtool_ntuple_list.list, list) {
978 sprintf(p, "Filter %d:\n", i);
979 p += ETH_GSTRING_LEN;
980 num_strings++;
981
982 switch (fsc->fs.flow_type) {
983 case TCP_V4_FLOW:
984 sprintf(p, "\tFlow Type: TCP\n");
985 p += ETH_GSTRING_LEN;
986 num_strings++;
987 break;
988 case UDP_V4_FLOW:
989 sprintf(p, "\tFlow Type: UDP\n");
990 p += ETH_GSTRING_LEN;
991 num_strings++;
992 break;
993 case SCTP_V4_FLOW:
994 sprintf(p, "\tFlow Type: SCTP\n");
995 p += ETH_GSTRING_LEN;
996 num_strings++;
997 break;
998 case AH_ESP_V4_FLOW:
999 sprintf(p, "\tFlow Type: AH ESP\n");
1000 p += ETH_GSTRING_LEN;
1001 num_strings++;
1002 break;
1003 case ESP_V4_FLOW:
1004 sprintf(p, "\tFlow Type: ESP\n");
1005 p += ETH_GSTRING_LEN;
1006 num_strings++;
1007 break;
1008 case IP_USER_FLOW:
1009 sprintf(p, "\tFlow Type: Raw IP\n");
1010 p += ETH_GSTRING_LEN;
1011 num_strings++;
1012 break;
1013 case IPV4_FLOW:
1014 sprintf(p, "\tFlow Type: IPv4\n");
1015 p += ETH_GSTRING_LEN;
1016 num_strings++;
1017 break;
1018 default:
1019 sprintf(p, "\tFlow Type: Unknown\n");
1020 p += ETH_GSTRING_LEN;
1021 num_strings++;
1022 goto unknown_filter;
1023 }
1024
1025 /* now the rest of the filters */
1026 switch (fsc->fs.flow_type) {
1027 case TCP_V4_FLOW:
1028 case UDP_V4_FLOW:
1029 case SCTP_V4_FLOW:
1030 sprintf(p, "\tSrc IP addr: 0x%x\n",
1031 fsc->fs.h_u.tcp_ip4_spec.ip4src);
1032 p += ETH_GSTRING_LEN;
1033 num_strings++;
1034 sprintf(p, "\tSrc IP mask: 0x%x\n",
1035 fsc->fs.m_u.tcp_ip4_spec.ip4src);
1036 p += ETH_GSTRING_LEN;
1037 num_strings++;
1038 sprintf(p, "\tDest IP addr: 0x%x\n",
1039 fsc->fs.h_u.tcp_ip4_spec.ip4dst);
1040 p += ETH_GSTRING_LEN;
1041 num_strings++;
1042 sprintf(p, "\tDest IP mask: 0x%x\n",
1043 fsc->fs.m_u.tcp_ip4_spec.ip4dst);
1044 p += ETH_GSTRING_LEN;
1045 num_strings++;
1046 sprintf(p, "\tSrc Port: %d, mask: 0x%x\n",
1047 fsc->fs.h_u.tcp_ip4_spec.psrc,
1048 fsc->fs.m_u.tcp_ip4_spec.psrc);
1049 p += ETH_GSTRING_LEN;
1050 num_strings++;
1051 sprintf(p, "\tDest Port: %d, mask: 0x%x\n",
1052 fsc->fs.h_u.tcp_ip4_spec.pdst,
1053 fsc->fs.m_u.tcp_ip4_spec.pdst);
1054 p += ETH_GSTRING_LEN;
1055 num_strings++;
1056 sprintf(p, "\tTOS: %d, mask: 0x%x\n",
1057 fsc->fs.h_u.tcp_ip4_spec.tos,
1058 fsc->fs.m_u.tcp_ip4_spec.tos);
1059 p += ETH_GSTRING_LEN;
1060 num_strings++;
1061 break;
1062 case AH_ESP_V4_FLOW:
1063 case ESP_V4_FLOW:
1064 sprintf(p, "\tSrc IP addr: 0x%x\n",
1065 fsc->fs.h_u.ah_ip4_spec.ip4src);
1066 p += ETH_GSTRING_LEN;
1067 num_strings++;
1068 sprintf(p, "\tSrc IP mask: 0x%x\n",
1069 fsc->fs.m_u.ah_ip4_spec.ip4src);
1070 p += ETH_GSTRING_LEN;
1071 num_strings++;
1072 sprintf(p, "\tDest IP addr: 0x%x\n",
1073 fsc->fs.h_u.ah_ip4_spec.ip4dst);
1074 p += ETH_GSTRING_LEN;
1075 num_strings++;
1076 sprintf(p, "\tDest IP mask: 0x%x\n",
1077 fsc->fs.m_u.ah_ip4_spec.ip4dst);
1078 p += ETH_GSTRING_LEN;
1079 num_strings++;
1080 sprintf(p, "\tSPI: %d, mask: 0x%x\n",
1081 fsc->fs.h_u.ah_ip4_spec.spi,
1082 fsc->fs.m_u.ah_ip4_spec.spi);
1083 p += ETH_GSTRING_LEN;
1084 num_strings++;
1085 sprintf(p, "\tTOS: %d, mask: 0x%x\n",
1086 fsc->fs.h_u.ah_ip4_spec.tos,
1087 fsc->fs.m_u.ah_ip4_spec.tos);
1088 p += ETH_GSTRING_LEN;
1089 num_strings++;
1090 break;
1091 case IP_USER_FLOW:
1092 sprintf(p, "\tSrc IP addr: 0x%x\n",
1093 fsc->fs.h_u.usr_ip4_spec.ip4src);
1094 p += ETH_GSTRING_LEN;
1095 num_strings++;
1096 sprintf(p, "\tSrc IP mask: 0x%x\n",
1097 fsc->fs.m_u.usr_ip4_spec.ip4src);
1098 p += ETH_GSTRING_LEN;
1099 num_strings++;
1100 sprintf(p, "\tDest IP addr: 0x%x\n",
1101 fsc->fs.h_u.usr_ip4_spec.ip4dst);
1102 p += ETH_GSTRING_LEN;
1103 num_strings++;
1104 sprintf(p, "\tDest IP mask: 0x%x\n",
1105 fsc->fs.m_u.usr_ip4_spec.ip4dst);
1106 p += ETH_GSTRING_LEN;
1107 num_strings++;
1108 break;
1109 case IPV4_FLOW:
1110 sprintf(p, "\tSrc IP addr: 0x%x\n",
1111 fsc->fs.h_u.usr_ip4_spec.ip4src);
1112 p += ETH_GSTRING_LEN;
1113 num_strings++;
1114 sprintf(p, "\tSrc IP mask: 0x%x\n",
1115 fsc->fs.m_u.usr_ip4_spec.ip4src);
1116 p += ETH_GSTRING_LEN;
1117 num_strings++;
1118 sprintf(p, "\tDest IP addr: 0x%x\n",
1119 fsc->fs.h_u.usr_ip4_spec.ip4dst);
1120 p += ETH_GSTRING_LEN;
1121 num_strings++;
1122 sprintf(p, "\tDest IP mask: 0x%x\n",
1123 fsc->fs.m_u.usr_ip4_spec.ip4dst);
1124 p += ETH_GSTRING_LEN;
1125 num_strings++;
1126 sprintf(p, "\tL4 bytes: 0x%x, mask: 0x%x\n",
1127 fsc->fs.h_u.usr_ip4_spec.l4_4_bytes,
1128 fsc->fs.m_u.usr_ip4_spec.l4_4_bytes);
1129 p += ETH_GSTRING_LEN;
1130 num_strings++;
1131 sprintf(p, "\tTOS: %d, mask: 0x%x\n",
1132 fsc->fs.h_u.usr_ip4_spec.tos,
1133 fsc->fs.m_u.usr_ip4_spec.tos);
1134 p += ETH_GSTRING_LEN;
1135 num_strings++;
1136 sprintf(p, "\tIP Version: %d, mask: 0x%x\n",
1137 fsc->fs.h_u.usr_ip4_spec.ip_ver,
1138 fsc->fs.m_u.usr_ip4_spec.ip_ver);
1139 p += ETH_GSTRING_LEN;
1140 num_strings++;
1141 sprintf(p, "\tProtocol: %d, mask: 0x%x\n",
1142 fsc->fs.h_u.usr_ip4_spec.proto,
1143 fsc->fs.m_u.usr_ip4_spec.proto);
1144 p += ETH_GSTRING_LEN;
1145 num_strings++;
1146 break;
1147 }
1148 sprintf(p, "\tVLAN: %d, mask: 0x%x\n",
1149 fsc->fs.vlan_tag, fsc->fs.vlan_tag_mask);
1150 p += ETH_GSTRING_LEN;
1151 num_strings++;
1152 sprintf(p, "\tUser-defined: 0x%Lx\n", fsc->fs.data);
1153 p += ETH_GSTRING_LEN;
1154 num_strings++;
1155 sprintf(p, "\tUser-defined mask: 0x%Lx\n", fsc->fs.data_mask);
1156 p += ETH_GSTRING_LEN;
1157 num_strings++;
1158 if (fsc->fs.action == ETHTOOL_RXNTUPLE_ACTION_DROP)
1159 sprintf(p, "\tAction: Drop\n");
1160 else
1161 sprintf(p, "\tAction: Direct to queue %d\n",
1162 fsc->fs.action);
1163 p += ETH_GSTRING_LEN;
1164 num_strings++;
1165 unknown_filter:
1166 i++;
1167 }
1168 copy:
1169 /* indicate to userspace how many strings we actually have */
1170 gstrings.len = num_strings;
1171 ret = -EFAULT;
1172 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1173 goto out;
1174 useraddr += sizeof(gstrings);
1175 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1176 goto out;
1177 ret = 0;
1178
1179 out:
1180 kfree(data);
1181 return ret;
1182 }
1183
1184 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1185 {
1186 struct ethtool_regs regs;
1187 const struct ethtool_ops *ops = dev->ethtool_ops;
1188 void *regbuf;
1189 int reglen, ret;
1190
1191 if (!ops->get_regs || !ops->get_regs_len)
1192 return -EOPNOTSUPP;
1193
1194 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1195 return -EFAULT;
1196
1197 reglen = ops->get_regs_len(dev);
1198 if (regs.len > reglen)
1199 regs.len = reglen;
1200
1201 regbuf = vzalloc(reglen);
1202 if (!regbuf)
1203 return -ENOMEM;
1204
1205 ops->get_regs(dev, &regs, regbuf);
1206
1207 ret = -EFAULT;
1208 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1209 goto out;
1210 useraddr += offsetof(struct ethtool_regs, data);
1211 if (copy_to_user(useraddr, regbuf, regs.len))
1212 goto out;
1213 ret = 0;
1214
1215 out:
1216 vfree(regbuf);
1217 return ret;
1218 }
1219
1220 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1221 {
1222 struct ethtool_value reset;
1223 int ret;
1224
1225 if (!dev->ethtool_ops->reset)
1226 return -EOPNOTSUPP;
1227
1228 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1229 return -EFAULT;
1230
1231 ret = dev->ethtool_ops->reset(dev, &reset.data);
1232 if (ret)
1233 return ret;
1234
1235 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1236 return -EFAULT;
1237 return 0;
1238 }
1239
1240 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1241 {
1242 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1243
1244 if (!dev->ethtool_ops->get_wol)
1245 return -EOPNOTSUPP;
1246
1247 dev->ethtool_ops->get_wol(dev, &wol);
1248
1249 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1250 return -EFAULT;
1251 return 0;
1252 }
1253
1254 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1255 {
1256 struct ethtool_wolinfo wol;
1257
1258 if (!dev->ethtool_ops->set_wol)
1259 return -EOPNOTSUPP;
1260
1261 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1262 return -EFAULT;
1263
1264 return dev->ethtool_ops->set_wol(dev, &wol);
1265 }
1266
1267 static int ethtool_nway_reset(struct net_device *dev)
1268 {
1269 if (!dev->ethtool_ops->nway_reset)
1270 return -EOPNOTSUPP;
1271
1272 return dev->ethtool_ops->nway_reset(dev);
1273 }
1274
1275 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1276 {
1277 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1278
1279 if (!dev->ethtool_ops->get_link)
1280 return -EOPNOTSUPP;
1281
1282 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1283
1284 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1285 return -EFAULT;
1286 return 0;
1287 }
1288
1289 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1290 {
1291 struct ethtool_eeprom eeprom;
1292 const struct ethtool_ops *ops = dev->ethtool_ops;
1293 void __user *userbuf = useraddr + sizeof(eeprom);
1294 u32 bytes_remaining;
1295 u8 *data;
1296 int ret = 0;
1297
1298 if (!ops->get_eeprom || !ops->get_eeprom_len)
1299 return -EOPNOTSUPP;
1300
1301 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1302 return -EFAULT;
1303
1304 /* Check for wrap and zero */
1305 if (eeprom.offset + eeprom.len <= eeprom.offset)
1306 return -EINVAL;
1307
1308 /* Check for exceeding total eeprom len */
1309 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1310 return -EINVAL;
1311
1312 data = kmalloc(PAGE_SIZE, GFP_USER);
1313 if (!data)
1314 return -ENOMEM;
1315
1316 bytes_remaining = eeprom.len;
1317 while (bytes_remaining > 0) {
1318 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1319
1320 ret = ops->get_eeprom(dev, &eeprom, data);
1321 if (ret)
1322 break;
1323 if (copy_to_user(userbuf, data, eeprom.len)) {
1324 ret = -EFAULT;
1325 break;
1326 }
1327 userbuf += eeprom.len;
1328 eeprom.offset += eeprom.len;
1329 bytes_remaining -= eeprom.len;
1330 }
1331
1332 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1333 eeprom.offset -= eeprom.len;
1334 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1335 ret = -EFAULT;
1336
1337 kfree(data);
1338 return ret;
1339 }
1340
1341 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1342 {
1343 struct ethtool_eeprom eeprom;
1344 const struct ethtool_ops *ops = dev->ethtool_ops;
1345 void __user *userbuf = useraddr + sizeof(eeprom);
1346 u32 bytes_remaining;
1347 u8 *data;
1348 int ret = 0;
1349
1350 if (!ops->set_eeprom || !ops->get_eeprom_len)
1351 return -EOPNOTSUPP;
1352
1353 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1354 return -EFAULT;
1355
1356 /* Check for wrap and zero */
1357 if (eeprom.offset + eeprom.len <= eeprom.offset)
1358 return -EINVAL;
1359
1360 /* Check for exceeding total eeprom len */
1361 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1362 return -EINVAL;
1363
1364 data = kmalloc(PAGE_SIZE, GFP_USER);
1365 if (!data)
1366 return -ENOMEM;
1367
1368 bytes_remaining = eeprom.len;
1369 while (bytes_remaining > 0) {
1370 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1371
1372 if (copy_from_user(data, userbuf, eeprom.len)) {
1373 ret = -EFAULT;
1374 break;
1375 }
1376 ret = ops->set_eeprom(dev, &eeprom, data);
1377 if (ret)
1378 break;
1379 userbuf += eeprom.len;
1380 eeprom.offset += eeprom.len;
1381 bytes_remaining -= eeprom.len;
1382 }
1383
1384 kfree(data);
1385 return ret;
1386 }
1387
1388 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1389 void __user *useraddr)
1390 {
1391 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1392
1393 if (!dev->ethtool_ops->get_coalesce)
1394 return -EOPNOTSUPP;
1395
1396 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1397
1398 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1399 return -EFAULT;
1400 return 0;
1401 }
1402
1403 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1404 void __user *useraddr)
1405 {
1406 struct ethtool_coalesce coalesce;
1407
1408 if (!dev->ethtool_ops->set_coalesce)
1409 return -EOPNOTSUPP;
1410
1411 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1412 return -EFAULT;
1413
1414 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1415 }
1416
1417 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1418 {
1419 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1420
1421 if (!dev->ethtool_ops->get_ringparam)
1422 return -EOPNOTSUPP;
1423
1424 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1425
1426 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1427 return -EFAULT;
1428 return 0;
1429 }
1430
1431 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1432 {
1433 struct ethtool_ringparam ringparam;
1434
1435 if (!dev->ethtool_ops->set_ringparam)
1436 return -EOPNOTSUPP;
1437
1438 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1439 return -EFAULT;
1440
1441 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1442 }
1443
1444 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1445 {
1446 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1447
1448 if (!dev->ethtool_ops->get_pauseparam)
1449 return -EOPNOTSUPP;
1450
1451 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1452
1453 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1454 return -EFAULT;
1455 return 0;
1456 }
1457
1458 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1459 {
1460 struct ethtool_pauseparam pauseparam;
1461
1462 if (!dev->ethtool_ops->set_pauseparam)
1463 return -EOPNOTSUPP;
1464
1465 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1466 return -EFAULT;
1467
1468 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1469 }
1470
1471 static int __ethtool_set_sg(struct net_device *dev, u32 data)
1472 {
1473 int err;
1474
1475 if (!dev->ethtool_ops->set_sg)
1476 return -EOPNOTSUPP;
1477
1478 if (data && !(dev->features & NETIF_F_ALL_CSUM))
1479 return -EINVAL;
1480
1481 if (!data && dev->ethtool_ops->set_tso) {
1482 err = dev->ethtool_ops->set_tso(dev, 0);
1483 if (err)
1484 return err;
1485 }
1486
1487 if (!data && dev->ethtool_ops->set_ufo) {
1488 err = dev->ethtool_ops->set_ufo(dev, 0);
1489 if (err)
1490 return err;
1491 }
1492 return dev->ethtool_ops->set_sg(dev, data);
1493 }
1494
1495 static int __ethtool_set_tx_csum(struct net_device *dev, u32 data)
1496 {
1497 int err;
1498
1499 if (!dev->ethtool_ops->set_tx_csum)
1500 return -EOPNOTSUPP;
1501
1502 if (!data && dev->ethtool_ops->set_sg) {
1503 err = __ethtool_set_sg(dev, 0);
1504 if (err)
1505 return err;
1506 }
1507
1508 return dev->ethtool_ops->set_tx_csum(dev, data);
1509 }
1510
1511 static int __ethtool_set_rx_csum(struct net_device *dev, u32 data)
1512 {
1513 if (!dev->ethtool_ops->set_rx_csum)
1514 return -EOPNOTSUPP;
1515
1516 if (!data)
1517 dev->features &= ~NETIF_F_GRO;
1518
1519 return dev->ethtool_ops->set_rx_csum(dev, data);
1520 }
1521
1522 static int __ethtool_set_tso(struct net_device *dev, u32 data)
1523 {
1524 if (!dev->ethtool_ops->set_tso)
1525 return -EOPNOTSUPP;
1526
1527 if (data && !(dev->features & NETIF_F_SG))
1528 return -EINVAL;
1529
1530 return dev->ethtool_ops->set_tso(dev, data);
1531 }
1532
1533 static int __ethtool_set_ufo(struct net_device *dev, u32 data)
1534 {
1535 if (!dev->ethtool_ops->set_ufo)
1536 return -EOPNOTSUPP;
1537 if (data && !(dev->features & NETIF_F_SG))
1538 return -EINVAL;
1539 if (data && !((dev->features & NETIF_F_GEN_CSUM) ||
1540 (dev->features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
1541 == (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)))
1542 return -EINVAL;
1543 return dev->ethtool_ops->set_ufo(dev, data);
1544 }
1545
1546 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1547 {
1548 struct ethtool_test test;
1549 const struct ethtool_ops *ops = dev->ethtool_ops;
1550 u64 *data;
1551 int ret, test_len;
1552
1553 if (!ops->self_test || !ops->get_sset_count)
1554 return -EOPNOTSUPP;
1555
1556 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1557 if (test_len < 0)
1558 return test_len;
1559 WARN_ON(test_len == 0);
1560
1561 if (copy_from_user(&test, useraddr, sizeof(test)))
1562 return -EFAULT;
1563
1564 test.len = test_len;
1565 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1566 if (!data)
1567 return -ENOMEM;
1568
1569 ops->self_test(dev, &test, data);
1570
1571 ret = -EFAULT;
1572 if (copy_to_user(useraddr, &test, sizeof(test)))
1573 goto out;
1574 useraddr += sizeof(test);
1575 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1576 goto out;
1577 ret = 0;
1578
1579 out:
1580 kfree(data);
1581 return ret;
1582 }
1583
1584 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1585 {
1586 struct ethtool_gstrings gstrings;
1587 u8 *data;
1588 int ret;
1589
1590 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1591 return -EFAULT;
1592
1593 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1594 if (ret < 0)
1595 return ret;
1596
1597 gstrings.len = ret;
1598
1599 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1600 if (!data)
1601 return -ENOMEM;
1602
1603 __ethtool_get_strings(dev, gstrings.string_set, data);
1604
1605 ret = -EFAULT;
1606 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1607 goto out;
1608 useraddr += sizeof(gstrings);
1609 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1610 goto out;
1611 ret = 0;
1612
1613 out:
1614 kfree(data);
1615 return ret;
1616 }
1617
1618 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1619 {
1620 struct ethtool_value id;
1621
1622 if (!dev->ethtool_ops->phys_id)
1623 return -EOPNOTSUPP;
1624
1625 if (copy_from_user(&id, useraddr, sizeof(id)))
1626 return -EFAULT;
1627
1628 return dev->ethtool_ops->phys_id(dev, id.data);
1629 }
1630
1631 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1632 {
1633 struct ethtool_stats stats;
1634 const struct ethtool_ops *ops = dev->ethtool_ops;
1635 u64 *data;
1636 int ret, n_stats;
1637
1638 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1639 return -EOPNOTSUPP;
1640
1641 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1642 if (n_stats < 0)
1643 return n_stats;
1644 WARN_ON(n_stats == 0);
1645
1646 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1647 return -EFAULT;
1648
1649 stats.n_stats = n_stats;
1650 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1651 if (!data)
1652 return -ENOMEM;
1653
1654 ops->get_ethtool_stats(dev, &stats, data);
1655
1656 ret = -EFAULT;
1657 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1658 goto out;
1659 useraddr += sizeof(stats);
1660 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1661 goto out;
1662 ret = 0;
1663
1664 out:
1665 kfree(data);
1666 return ret;
1667 }
1668
1669 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1670 {
1671 struct ethtool_perm_addr epaddr;
1672
1673 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1674 return -EFAULT;
1675
1676 if (epaddr.size < dev->addr_len)
1677 return -ETOOSMALL;
1678 epaddr.size = dev->addr_len;
1679
1680 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1681 return -EFAULT;
1682 useraddr += sizeof(epaddr);
1683 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1684 return -EFAULT;
1685 return 0;
1686 }
1687
1688 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1689 u32 cmd, u32 (*actor)(struct net_device *))
1690 {
1691 struct ethtool_value edata = { .cmd = cmd };
1692
1693 if (!actor)
1694 return -EOPNOTSUPP;
1695
1696 edata.data = actor(dev);
1697
1698 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1699 return -EFAULT;
1700 return 0;
1701 }
1702
1703 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1704 void (*actor)(struct net_device *, u32))
1705 {
1706 struct ethtool_value edata;
1707
1708 if (!actor)
1709 return -EOPNOTSUPP;
1710
1711 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1712 return -EFAULT;
1713
1714 actor(dev, edata.data);
1715 return 0;
1716 }
1717
1718 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1719 int (*actor)(struct net_device *, u32))
1720 {
1721 struct ethtool_value edata;
1722
1723 if (!actor)
1724 return -EOPNOTSUPP;
1725
1726 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1727 return -EFAULT;
1728
1729 return actor(dev, edata.data);
1730 }
1731
1732 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1733 char __user *useraddr)
1734 {
1735 struct ethtool_flash efl;
1736
1737 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1738 return -EFAULT;
1739
1740 if (!dev->ethtool_ops->flash_device)
1741 return -EOPNOTSUPP;
1742
1743 return dev->ethtool_ops->flash_device(dev, &efl);
1744 }
1745
1746 /* The main entry point in this file. Called from net/core/dev.c */
1747
1748 int dev_ethtool(struct net *net, struct ifreq *ifr)
1749 {
1750 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1751 void __user *useraddr = ifr->ifr_data;
1752 u32 ethcmd;
1753 int rc;
1754 u32 old_features;
1755
1756 if (!dev || !netif_device_present(dev))
1757 return -ENODEV;
1758
1759 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1760 return -EFAULT;
1761
1762 if (!dev->ethtool_ops) {
1763 /* ETHTOOL_GDRVINFO does not require any driver support.
1764 * It is also unprivileged and does not change anything,
1765 * so we can take a shortcut to it. */
1766 if (ethcmd == ETHTOOL_GDRVINFO)
1767 return ethtool_get_drvinfo(dev, useraddr);
1768 else
1769 return -EOPNOTSUPP;
1770 }
1771
1772 /* Allow some commands to be done by anyone */
1773 switch (ethcmd) {
1774 case ETHTOOL_GSET:
1775 case ETHTOOL_GDRVINFO:
1776 case ETHTOOL_GMSGLVL:
1777 case ETHTOOL_GCOALESCE:
1778 case ETHTOOL_GRINGPARAM:
1779 case ETHTOOL_GPAUSEPARAM:
1780 case ETHTOOL_GRXCSUM:
1781 case ETHTOOL_GTXCSUM:
1782 case ETHTOOL_GSG:
1783 case ETHTOOL_GSTRINGS:
1784 case ETHTOOL_GTSO:
1785 case ETHTOOL_GPERMADDR:
1786 case ETHTOOL_GUFO:
1787 case ETHTOOL_GGSO:
1788 case ETHTOOL_GGRO:
1789 case ETHTOOL_GFLAGS:
1790 case ETHTOOL_GPFLAGS:
1791 case ETHTOOL_GRXFH:
1792 case ETHTOOL_GRXRINGS:
1793 case ETHTOOL_GRXCLSRLCNT:
1794 case ETHTOOL_GRXCLSRULE:
1795 case ETHTOOL_GRXCLSRLALL:
1796 case ETHTOOL_GFEATURES:
1797 break;
1798 default:
1799 if (!capable(CAP_NET_ADMIN))
1800 return -EPERM;
1801 }
1802
1803 if (dev->ethtool_ops->begin) {
1804 rc = dev->ethtool_ops->begin(dev);
1805 if (rc < 0)
1806 return rc;
1807 }
1808 old_features = dev->features;
1809
1810 switch (ethcmd) {
1811 case ETHTOOL_GSET:
1812 rc = ethtool_get_settings(dev, useraddr);
1813 break;
1814 case ETHTOOL_SSET:
1815 rc = ethtool_set_settings(dev, useraddr);
1816 break;
1817 case ETHTOOL_GDRVINFO:
1818 rc = ethtool_get_drvinfo(dev, useraddr);
1819 break;
1820 case ETHTOOL_GREGS:
1821 rc = ethtool_get_regs(dev, useraddr);
1822 break;
1823 case ETHTOOL_GWOL:
1824 rc = ethtool_get_wol(dev, useraddr);
1825 break;
1826 case ETHTOOL_SWOL:
1827 rc = ethtool_set_wol(dev, useraddr);
1828 break;
1829 case ETHTOOL_GMSGLVL:
1830 rc = ethtool_get_value(dev, useraddr, ethcmd,
1831 dev->ethtool_ops->get_msglevel);
1832 break;
1833 case ETHTOOL_SMSGLVL:
1834 rc = ethtool_set_value_void(dev, useraddr,
1835 dev->ethtool_ops->set_msglevel);
1836 break;
1837 case ETHTOOL_NWAY_RST:
1838 rc = ethtool_nway_reset(dev);
1839 break;
1840 case ETHTOOL_GLINK:
1841 rc = ethtool_get_link(dev, useraddr);
1842 break;
1843 case ETHTOOL_GEEPROM:
1844 rc = ethtool_get_eeprom(dev, useraddr);
1845 break;
1846 case ETHTOOL_SEEPROM:
1847 rc = ethtool_set_eeprom(dev, useraddr);
1848 break;
1849 case ETHTOOL_GCOALESCE:
1850 rc = ethtool_get_coalesce(dev, useraddr);
1851 break;
1852 case ETHTOOL_SCOALESCE:
1853 rc = ethtool_set_coalesce(dev, useraddr);
1854 break;
1855 case ETHTOOL_GRINGPARAM:
1856 rc = ethtool_get_ringparam(dev, useraddr);
1857 break;
1858 case ETHTOOL_SRINGPARAM:
1859 rc = ethtool_set_ringparam(dev, useraddr);
1860 break;
1861 case ETHTOOL_GPAUSEPARAM:
1862 rc = ethtool_get_pauseparam(dev, useraddr);
1863 break;
1864 case ETHTOOL_SPAUSEPARAM:
1865 rc = ethtool_set_pauseparam(dev, useraddr);
1866 break;
1867 case ETHTOOL_TEST:
1868 rc = ethtool_self_test(dev, useraddr);
1869 break;
1870 case ETHTOOL_GSTRINGS:
1871 rc = ethtool_get_strings(dev, useraddr);
1872 break;
1873 case ETHTOOL_PHYS_ID:
1874 rc = ethtool_phys_id(dev, useraddr);
1875 break;
1876 case ETHTOOL_GSTATS:
1877 rc = ethtool_get_stats(dev, useraddr);
1878 break;
1879 case ETHTOOL_GPERMADDR:
1880 rc = ethtool_get_perm_addr(dev, useraddr);
1881 break;
1882 case ETHTOOL_GFLAGS:
1883 rc = ethtool_get_value(dev, useraddr, ethcmd,
1884 (dev->ethtool_ops->get_flags ?
1885 dev->ethtool_ops->get_flags :
1886 ethtool_op_get_flags));
1887 break;
1888 case ETHTOOL_SFLAGS:
1889 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
1890 break;
1891 case ETHTOOL_GPFLAGS:
1892 rc = ethtool_get_value(dev, useraddr, ethcmd,
1893 dev->ethtool_ops->get_priv_flags);
1894 break;
1895 case ETHTOOL_SPFLAGS:
1896 rc = ethtool_set_value(dev, useraddr,
1897 dev->ethtool_ops->set_priv_flags);
1898 break;
1899 case ETHTOOL_GRXFH:
1900 case ETHTOOL_GRXRINGS:
1901 case ETHTOOL_GRXCLSRLCNT:
1902 case ETHTOOL_GRXCLSRULE:
1903 case ETHTOOL_GRXCLSRLALL:
1904 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1905 break;
1906 case ETHTOOL_SRXFH:
1907 case ETHTOOL_SRXCLSRLDEL:
1908 case ETHTOOL_SRXCLSRLINS:
1909 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1910 break;
1911 case ETHTOOL_FLASHDEV:
1912 rc = ethtool_flash_device(dev, useraddr);
1913 break;
1914 case ETHTOOL_RESET:
1915 rc = ethtool_reset(dev, useraddr);
1916 break;
1917 case ETHTOOL_SRXNTUPLE:
1918 rc = ethtool_set_rx_ntuple(dev, useraddr);
1919 break;
1920 case ETHTOOL_GRXNTUPLE:
1921 rc = ethtool_get_rx_ntuple(dev, useraddr);
1922 break;
1923 case ETHTOOL_GSSET_INFO:
1924 rc = ethtool_get_sset_info(dev, useraddr);
1925 break;
1926 case ETHTOOL_GRXFHINDIR:
1927 rc = ethtool_get_rxfh_indir(dev, useraddr);
1928 break;
1929 case ETHTOOL_SRXFHINDIR:
1930 rc = ethtool_set_rxfh_indir(dev, useraddr);
1931 break;
1932 case ETHTOOL_GFEATURES:
1933 rc = ethtool_get_features(dev, useraddr);
1934 break;
1935 case ETHTOOL_SFEATURES:
1936 rc = ethtool_set_features(dev, useraddr);
1937 break;
1938 case ETHTOOL_GTXCSUM:
1939 case ETHTOOL_GRXCSUM:
1940 case ETHTOOL_GSG:
1941 case ETHTOOL_GTSO:
1942 case ETHTOOL_GUFO:
1943 case ETHTOOL_GGSO:
1944 case ETHTOOL_GGRO:
1945 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
1946 break;
1947 case ETHTOOL_STXCSUM:
1948 case ETHTOOL_SRXCSUM:
1949 case ETHTOOL_SSG:
1950 case ETHTOOL_STSO:
1951 case ETHTOOL_SUFO:
1952 case ETHTOOL_SGSO:
1953 case ETHTOOL_SGRO:
1954 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
1955 break;
1956 default:
1957 rc = -EOPNOTSUPP;
1958 }
1959
1960 if (dev->ethtool_ops->complete)
1961 dev->ethtool_ops->complete(dev);
1962
1963 if (old_features != dev->features)
1964 netdev_features_change(dev);
1965
1966 return rc;
1967 }
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