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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/bitops.h>
21#include <linux/uaccess.h>
22#include <linux/vmalloc.h>
23#include <linux/slab.h>
24#include <linux/rtnetlink.h>
25#include <linux/sched.h>
26
27/*
28 * Some useful ethtool_ops methods that're device independent.
29 * If we find that all drivers want to do the same thing here,
30 * we can turn these into dev_() function calls.
31 */
32
33u32 ethtool_op_get_link(struct net_device *dev)
34{
35 return netif_carrier_ok(dev) ? 1 : 0;
36}
37EXPORT_SYMBOL(ethtool_op_get_link);
38
39u32 ethtool_op_get_tx_csum(struct net_device *dev)
40{
41 return (dev->features & NETIF_F_ALL_CSUM) != 0;
42}
43EXPORT_SYMBOL(ethtool_op_get_tx_csum);
44
45int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
46{
47 if (data)
48 dev->features |= NETIF_F_IP_CSUM;
49 else
50 dev->features &= ~NETIF_F_IP_CSUM;
51
52 return 0;
53}
54EXPORT_SYMBOL(ethtool_op_set_tx_csum);
55
56int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
57{
58 if (data)
59 dev->features |= NETIF_F_HW_CSUM;
60 else
61 dev->features &= ~NETIF_F_HW_CSUM;
62
63 return 0;
64}
65EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
66
67int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
68{
69 if (data)
70 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
71 else
72 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
73
74 return 0;
75}
76EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
77
78u32 ethtool_op_get_sg(struct net_device *dev)
79{
80 return (dev->features & NETIF_F_SG) != 0;
81}
82EXPORT_SYMBOL(ethtool_op_get_sg);
83
84int ethtool_op_set_sg(struct net_device *dev, u32 data)
85{
86 if (data)
87 dev->features |= NETIF_F_SG;
88 else
89 dev->features &= ~NETIF_F_SG;
90
91 return 0;
92}
93EXPORT_SYMBOL(ethtool_op_set_sg);
94
95u32 ethtool_op_get_tso(struct net_device *dev)
96{
97 return (dev->features & NETIF_F_TSO) != 0;
98}
99EXPORT_SYMBOL(ethtool_op_get_tso);
100
101int ethtool_op_set_tso(struct net_device *dev, u32 data)
102{
103 if (data)
104 dev->features |= NETIF_F_TSO;
105 else
106 dev->features &= ~NETIF_F_TSO;
107
108 return 0;
109}
110EXPORT_SYMBOL(ethtool_op_set_tso);
111
112u32 ethtool_op_get_ufo(struct net_device *dev)
113{
114 return (dev->features & NETIF_F_UFO) != 0;
115}
116EXPORT_SYMBOL(ethtool_op_get_ufo);
117
118int ethtool_op_set_ufo(struct net_device *dev, u32 data)
119{
120 if (data)
121 dev->features |= NETIF_F_UFO;
122 else
123 dev->features &= ~NETIF_F_UFO;
124 return 0;
125}
126EXPORT_SYMBOL(ethtool_op_set_ufo);
127
128/* the following list of flags are the same as their associated
129 * NETIF_F_xxx values in include/linux/netdevice.h
130 */
131static const u32 flags_dup_features =
132 (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | ETH_FLAG_NTUPLE |
133 ETH_FLAG_RXHASH);
134
135u32 ethtool_op_get_flags(struct net_device *dev)
136{
137 /* in the future, this function will probably contain additional
138 * handling for flags which are not so easily handled
139 * by a simple masking operation
140 */
141
142 return dev->features & flags_dup_features;
143}
144EXPORT_SYMBOL(ethtool_op_get_flags);
145
146/* Check if device can enable (or disable) particular feature coded in "data"
147 * argument. Flags "supported" describe features that can be toggled by device.
148 * If feature can not be toggled, it state (enabled or disabled) must match
149 * hardcoded device features state, otherwise flags are marked as invalid.
150 */
151bool ethtool_invalid_flags(struct net_device *dev, u32 data, u32 supported)
152{
153 u32 features = dev->features & flags_dup_features;
154 /* "data" can contain only flags_dup_features bits,
155 * see __ethtool_set_flags */
156
157 return (features & ~supported) != (data & ~supported);
158}
159EXPORT_SYMBOL(ethtool_invalid_flags);
160
161int ethtool_op_set_flags(struct net_device *dev, u32 data, u32 supported)
162{
163 if (ethtool_invalid_flags(dev, data, supported))
164 return -EINVAL;
165
166 dev->features = ((dev->features & ~flags_dup_features) |
167 (data & flags_dup_features));
168 return 0;
169}
170EXPORT_SYMBOL(ethtool_op_set_flags);
171
172/* Handlers for each ethtool command */
173
174#define ETHTOOL_DEV_FEATURE_WORDS 1
175
176static void ethtool_get_features_compat(struct net_device *dev,
177 struct ethtool_get_features_block *features)
178{
179 if (!dev->ethtool_ops)
180 return;
181
182 /* getting RX checksum */
183 if (dev->ethtool_ops->get_rx_csum)
184 if (dev->ethtool_ops->get_rx_csum(dev))
185 features[0].active |= NETIF_F_RXCSUM;
186
187 /* mark legacy-changeable features */
188 if (dev->ethtool_ops->set_sg)
189 features[0].available |= NETIF_F_SG;
190 if (dev->ethtool_ops->set_tx_csum)
191 features[0].available |= NETIF_F_ALL_CSUM;
192 if (dev->ethtool_ops->set_tso)
193 features[0].available |= NETIF_F_ALL_TSO;
194 if (dev->ethtool_ops->set_rx_csum)
195 features[0].available |= NETIF_F_RXCSUM;
196 if (dev->ethtool_ops->set_flags)
197 features[0].available |= flags_dup_features;
198}
199
200static int ethtool_set_feature_compat(struct net_device *dev,
201 int (*legacy_set)(struct net_device *, u32),
202 struct ethtool_set_features_block *features, u32 mask)
203{
204 u32 do_set;
205
206 if (!legacy_set)
207 return 0;
208
209 if (!(features[0].valid & mask))
210 return 0;
211
212 features[0].valid &= ~mask;
213
214 do_set = !!(features[0].requested & mask);
215
216 if (legacy_set(dev, do_set) < 0)
217 netdev_info(dev,
218 "Legacy feature change (%s) failed for 0x%08x\n",
219 do_set ? "set" : "clear", mask);
220
221 return 1;
222}
223
224static int ethtool_set_flags_compat(struct net_device *dev,
225 int (*legacy_set)(struct net_device *, u32),
226 struct ethtool_set_features_block *features, u32 mask)
227{
228 u32 value;
229
230 if (!legacy_set)
231 return 0;
232
233 if (!(features[0].valid & mask))
234 return 0;
235
236 value = dev->features & ~features[0].valid;
237 value |= features[0].requested;
238
239 features[0].valid &= ~mask;
240
241 if (legacy_set(dev, value & mask) < 0)
242 netdev_info(dev, "Legacy flags change failed\n");
243
244 return 1;
245}
246
247static int ethtool_set_features_compat(struct net_device *dev,
248 struct ethtool_set_features_block *features)
249{
250 int compat;
251
252 if (!dev->ethtool_ops)
253 return 0;
254
255 compat = ethtool_set_feature_compat(dev, dev->ethtool_ops->set_sg,
256 features, NETIF_F_SG);
257 compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_tx_csum,
258 features, NETIF_F_ALL_CSUM);
259 compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_tso,
260 features, NETIF_F_ALL_TSO);
261 compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_rx_csum,
262 features, NETIF_F_RXCSUM);
263 compat |= ethtool_set_flags_compat(dev, dev->ethtool_ops->set_flags,
264 features, flags_dup_features);
265
266 return compat;
267}
268
269static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
270{
271 struct ethtool_gfeatures cmd = {
272 .cmd = ETHTOOL_GFEATURES,
273 .size = ETHTOOL_DEV_FEATURE_WORDS,
274 };
275 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS] = {
276 {
277 .available = dev->hw_features,
278 .requested = dev->wanted_features,
279 .active = dev->features,
280 .never_changed = NETIF_F_NEVER_CHANGE,
281 },
282 };
283 u32 __user *sizeaddr;
284 u32 copy_size;
285
286 ethtool_get_features_compat(dev, features);
287
288 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
289 if (get_user(copy_size, sizeaddr))
290 return -EFAULT;
291
292 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
293 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
294
295 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
296 return -EFAULT;
297 useraddr += sizeof(cmd);
298 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
299 return -EFAULT;
300
301 return 0;
302}
303
304static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
305{
306 struct ethtool_sfeatures cmd;
307 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
308 int ret = 0;
309
310 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
311 return -EFAULT;
312 useraddr += sizeof(cmd);
313
314 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
315 return -EINVAL;
316
317 if (copy_from_user(features, useraddr, sizeof(features)))
318 return -EFAULT;
319
320 if (features[0].valid & ~NETIF_F_ETHTOOL_BITS)
321 return -EINVAL;
322
323 if (ethtool_set_features_compat(dev, features))
324 ret |= ETHTOOL_F_COMPAT;
325
326 if (features[0].valid & ~dev->hw_features) {
327 features[0].valid &= dev->hw_features;
328 ret |= ETHTOOL_F_UNSUPPORTED;
329 }
330
331 dev->wanted_features &= ~features[0].valid;
332 dev->wanted_features |= features[0].valid & features[0].requested;
333 __netdev_update_features(dev);
334
335 if ((dev->wanted_features ^ dev->features) & features[0].valid)
336 ret |= ETHTOOL_F_WISH;
337
338 return ret;
339}
340
341static const char netdev_features_strings[ETHTOOL_DEV_FEATURE_WORDS * 32][ETH_GSTRING_LEN] = {
342 /* NETIF_F_SG */ "tx-scatter-gather",
343 /* NETIF_F_IP_CSUM */ "tx-checksum-ipv4",
344 /* NETIF_F_NO_CSUM */ "tx-checksum-unneeded",
345 /* NETIF_F_HW_CSUM */ "tx-checksum-ip-generic",
346 /* NETIF_F_IPV6_CSUM */ "tx-checksum-ipv6",
347 /* NETIF_F_HIGHDMA */ "highdma",
348 /* NETIF_F_FRAGLIST */ "tx-scatter-gather-fraglist",
349 /* NETIF_F_HW_VLAN_TX */ "tx-vlan-hw-insert",
350
351 /* NETIF_F_HW_VLAN_RX */ "rx-vlan-hw-parse",
352 /* NETIF_F_HW_VLAN_FILTER */ "rx-vlan-filter",
353 /* NETIF_F_VLAN_CHALLENGED */ "vlan-challenged",
354 /* NETIF_F_GSO */ "tx-generic-segmentation",
355 /* NETIF_F_LLTX */ "tx-lockless",
356 /* NETIF_F_NETNS_LOCAL */ "netns-local",
357 /* NETIF_F_GRO */ "rx-gro",
358 /* NETIF_F_LRO */ "rx-lro",
359
360 /* NETIF_F_TSO */ "tx-tcp-segmentation",
361 /* NETIF_F_UFO */ "tx-udp-fragmentation",
362 /* NETIF_F_GSO_ROBUST */ "tx-gso-robust",
363 /* NETIF_F_TSO_ECN */ "tx-tcp-ecn-segmentation",
364 /* NETIF_F_TSO6 */ "tx-tcp6-segmentation",
365 /* NETIF_F_FSO */ "tx-fcoe-segmentation",
366 "",
367 "",
368
369 /* NETIF_F_FCOE_CRC */ "tx-checksum-fcoe-crc",
370 /* NETIF_F_SCTP_CSUM */ "tx-checksum-sctp",
371 /* NETIF_F_FCOE_MTU */ "fcoe-mtu",
372 /* NETIF_F_NTUPLE */ "rx-ntuple-filter",
373 /* NETIF_F_RXHASH */ "rx-hashing",
374 /* NETIF_F_RXCSUM */ "rx-checksum",
375 /* NETIF_F_NOCACHE_COPY */ "tx-nocache-copy",
376 /* NETIF_F_LOOPBACK */ "loopback",
377};
378
379static int __ethtool_get_sset_count(struct net_device *dev, int sset)
380{
381 const struct ethtool_ops *ops = dev->ethtool_ops;
382
383 if (sset == ETH_SS_FEATURES)
384 return ARRAY_SIZE(netdev_features_strings);
385
386 if (ops && ops->get_sset_count && ops->get_strings)
387 return ops->get_sset_count(dev, sset);
388 else
389 return -EOPNOTSUPP;
390}
391
392static void __ethtool_get_strings(struct net_device *dev,
393 u32 stringset, u8 *data)
394{
395 const struct ethtool_ops *ops = dev->ethtool_ops;
396
397 if (stringset == ETH_SS_FEATURES)
398 memcpy(data, netdev_features_strings,
399 sizeof(netdev_features_strings));
400 else
401 /* ops->get_strings is valid because checked earlier */
402 ops->get_strings(dev, stringset, data);
403}
404
405static u32 ethtool_get_feature_mask(u32 eth_cmd)
406{
407 /* feature masks of legacy discrete ethtool ops */
408
409 switch (eth_cmd) {
410 case ETHTOOL_GTXCSUM:
411 case ETHTOOL_STXCSUM:
412 return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM;
413 case ETHTOOL_GRXCSUM:
414 case ETHTOOL_SRXCSUM:
415 return NETIF_F_RXCSUM;
416 case ETHTOOL_GSG:
417 case ETHTOOL_SSG:
418 return NETIF_F_SG;
419 case ETHTOOL_GTSO:
420 case ETHTOOL_STSO:
421 return NETIF_F_ALL_TSO;
422 case ETHTOOL_GUFO:
423 case ETHTOOL_SUFO:
424 return NETIF_F_UFO;
425 case ETHTOOL_GGSO:
426 case ETHTOOL_SGSO:
427 return NETIF_F_GSO;
428 case ETHTOOL_GGRO:
429 case ETHTOOL_SGRO:
430 return NETIF_F_GRO;
431 default:
432 BUG();
433 }
434}
435
436static void *__ethtool_get_one_feature_actor(struct net_device *dev, u32 ethcmd)
437{
438 const struct ethtool_ops *ops = dev->ethtool_ops;
439
440 if (!ops)
441 return NULL;
442
443 switch (ethcmd) {
444 case ETHTOOL_GTXCSUM:
445 return ops->get_tx_csum;
446 case ETHTOOL_GRXCSUM:
447 return ops->get_rx_csum;
448 case ETHTOOL_SSG:
449 return ops->get_sg;
450 case ETHTOOL_STSO:
451 return ops->get_tso;
452 case ETHTOOL_SUFO:
453 return ops->get_ufo;
454 default:
455 return NULL;
456 }
457}
458
459static u32 __ethtool_get_rx_csum_oldbug(struct net_device *dev)
460{
461 return !!(dev->features & NETIF_F_ALL_CSUM);
462}
463
464static int ethtool_get_one_feature(struct net_device *dev,
465 char __user *useraddr, u32 ethcmd)
466{
467 u32 mask = ethtool_get_feature_mask(ethcmd);
468 struct ethtool_value edata = {
469 .cmd = ethcmd,
470 .data = !!(dev->features & mask),
471 };
472
473 /* compatibility with discrete get_ ops */
474 if (!(dev->hw_features & mask)) {
475 u32 (*actor)(struct net_device *);
476
477 actor = __ethtool_get_one_feature_actor(dev, ethcmd);
478
479 /* bug compatibility with old get_rx_csum */
480 if (ethcmd == ETHTOOL_GRXCSUM && !actor)
481 actor = __ethtool_get_rx_csum_oldbug;
482
483 if (actor)
484 edata.data = actor(dev);
485 }
486
487 if (copy_to_user(useraddr, &edata, sizeof(edata)))
488 return -EFAULT;
489 return 0;
490}
491
492static int __ethtool_set_tx_csum(struct net_device *dev, u32 data);
493static int __ethtool_set_rx_csum(struct net_device *dev, u32 data);
494static int __ethtool_set_sg(struct net_device *dev, u32 data);
495static int __ethtool_set_tso(struct net_device *dev, u32 data);
496static int __ethtool_set_ufo(struct net_device *dev, u32 data);
497
498static int ethtool_set_one_feature(struct net_device *dev,
499 void __user *useraddr, u32 ethcmd)
500{
501 struct ethtool_value edata;
502 u32 mask;
503
504 if (copy_from_user(&edata, useraddr, sizeof(edata)))
505 return -EFAULT;
506
507 mask = ethtool_get_feature_mask(ethcmd);
508 mask &= dev->hw_features;
509 if (mask) {
510 if (edata.data)
511 dev->wanted_features |= mask;
512 else
513 dev->wanted_features &= ~mask;
514
515 __netdev_update_features(dev);
516 return 0;
517 }
518
519 /* Driver is not converted to ndo_fix_features or does not
520 * support changing this offload. In the latter case it won't
521 * have corresponding ethtool_ops field set.
522 *
523 * Following part is to be removed after all drivers advertise
524 * their changeable features in netdev->hw_features and stop
525 * using discrete offload setting ops.
526 */
527
528 switch (ethcmd) {
529 case ETHTOOL_STXCSUM:
530 return __ethtool_set_tx_csum(dev, edata.data);
531 case ETHTOOL_SRXCSUM:
532 return __ethtool_set_rx_csum(dev, edata.data);
533 case ETHTOOL_SSG:
534 return __ethtool_set_sg(dev, edata.data);
535 case ETHTOOL_STSO:
536 return __ethtool_set_tso(dev, edata.data);
537 case ETHTOOL_SUFO:
538 return __ethtool_set_ufo(dev, edata.data);
539 default:
540 return -EOPNOTSUPP;
541 }
542}
543
544int __ethtool_set_flags(struct net_device *dev, u32 data)
545{
546 u32 changed;
547
548 if (data & ~flags_dup_features)
549 return -EINVAL;
550
551 /* legacy set_flags() op */
552 if (dev->ethtool_ops->set_flags) {
553 if (unlikely(dev->hw_features & flags_dup_features))
554 netdev_warn(dev,
555 "driver BUG: mixed hw_features and set_flags()\n");
556 return dev->ethtool_ops->set_flags(dev, data);
557 }
558
559 /* allow changing only bits set in hw_features */
560 changed = (data ^ dev->features) & flags_dup_features;
561 if (changed & ~dev->hw_features)
562 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
563
564 dev->wanted_features =
565 (dev->wanted_features & ~changed) | (data & dev->hw_features);
566
567 __netdev_update_features(dev);
568
569 return 0;
570}
571
572static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
573{
574 struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET };
575 int err;
576
577 if (!dev->ethtool_ops->get_settings)
578 return -EOPNOTSUPP;
579
580 err = dev->ethtool_ops->get_settings(dev, &cmd);
581 if (err < 0)
582 return err;
583
584 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
585 return -EFAULT;
586 return 0;
587}
588
589static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
590{
591 struct ethtool_cmd cmd;
592
593 if (!dev->ethtool_ops->set_settings)
594 return -EOPNOTSUPP;
595
596 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
597 return -EFAULT;
598
599 return dev->ethtool_ops->set_settings(dev, &cmd);
600}
601
602static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
603 void __user *useraddr)
604{
605 struct ethtool_drvinfo info;
606 const struct ethtool_ops *ops = dev->ethtool_ops;
607
608 memset(&info, 0, sizeof(info));
609 info.cmd = ETHTOOL_GDRVINFO;
610 if (ops && ops->get_drvinfo) {
611 ops->get_drvinfo(dev, &info);
612 } else if (dev->dev.parent && dev->dev.parent->driver) {
613 strlcpy(info.bus_info, dev_name(dev->dev.parent),
614 sizeof(info.bus_info));
615 strlcpy(info.driver, dev->dev.parent->driver->name,
616 sizeof(info.driver));
617 } else {
618 return -EOPNOTSUPP;
619 }
620
621 /*
622 * this method of obtaining string set info is deprecated;
623 * Use ETHTOOL_GSSET_INFO instead.
624 */
625 if (ops && ops->get_sset_count) {
626 int rc;
627
628 rc = ops->get_sset_count(dev, ETH_SS_TEST);
629 if (rc >= 0)
630 info.testinfo_len = rc;
631 rc = ops->get_sset_count(dev, ETH_SS_STATS);
632 if (rc >= 0)
633 info.n_stats = rc;
634 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
635 if (rc >= 0)
636 info.n_priv_flags = rc;
637 }
638 if (ops && ops->get_regs_len)
639 info.regdump_len = ops->get_regs_len(dev);
640 if (ops && ops->get_eeprom_len)
641 info.eedump_len = ops->get_eeprom_len(dev);
642
643 if (copy_to_user(useraddr, &info, sizeof(info)))
644 return -EFAULT;
645 return 0;
646}
647
648static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
649 void __user *useraddr)
650{
651 struct ethtool_sset_info info;
652 u64 sset_mask;
653 int i, idx = 0, n_bits = 0, ret, rc;
654 u32 *info_buf = NULL;
655
656 if (copy_from_user(&info, useraddr, sizeof(info)))
657 return -EFAULT;
658
659 /* store copy of mask, because we zero struct later on */
660 sset_mask = info.sset_mask;
661 if (!sset_mask)
662 return 0;
663
664 /* calculate size of return buffer */
665 n_bits = hweight64(sset_mask);
666
667 memset(&info, 0, sizeof(info));
668 info.cmd = ETHTOOL_GSSET_INFO;
669
670 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
671 if (!info_buf)
672 return -ENOMEM;
673
674 /*
675 * fill return buffer based on input bitmask and successful
676 * get_sset_count return
677 */
678 for (i = 0; i < 64; i++) {
679 if (!(sset_mask & (1ULL << i)))
680 continue;
681
682 rc = __ethtool_get_sset_count(dev, i);
683 if (rc >= 0) {
684 info.sset_mask |= (1ULL << i);
685 info_buf[idx++] = rc;
686 }
687 }
688
689 ret = -EFAULT;
690 if (copy_to_user(useraddr, &info, sizeof(info)))
691 goto out;
692
693 useraddr += offsetof(struct ethtool_sset_info, data);
694 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
695 goto out;
696
697 ret = 0;
698
699out:
700 kfree(info_buf);
701 return ret;
702}
703
704static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
705 u32 cmd, void __user *useraddr)
706{
707 struct ethtool_rxnfc info;
708 size_t info_size = sizeof(info);
709
710 if (!dev->ethtool_ops->set_rxnfc)
711 return -EOPNOTSUPP;
712
713 /* struct ethtool_rxnfc was originally defined for
714 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
715 * members. User-space might still be using that
716 * definition. */
717 if (cmd == ETHTOOL_SRXFH)
718 info_size = (offsetof(struct ethtool_rxnfc, data) +
719 sizeof(info.data));
720
721 if (copy_from_user(&info, useraddr, info_size))
722 return -EFAULT;
723
724 return dev->ethtool_ops->set_rxnfc(dev, &info);
725}
726
727static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
728 u32 cmd, void __user *useraddr)
729{
730 struct ethtool_rxnfc info;
731 size_t info_size = sizeof(info);
732 const struct ethtool_ops *ops = dev->ethtool_ops;
733 int ret;
734 void *rule_buf = NULL;
735
736 if (!ops->get_rxnfc)
737 return -EOPNOTSUPP;
738
739 /* struct ethtool_rxnfc was originally defined for
740 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
741 * members. User-space might still be using that
742 * definition. */
743 if (cmd == ETHTOOL_GRXFH)
744 info_size = (offsetof(struct ethtool_rxnfc, data) +
745 sizeof(info.data));
746
747 if (copy_from_user(&info, useraddr, info_size))
748 return -EFAULT;
749
750 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
751 if (info.rule_cnt > 0) {
752 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
753 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
754 GFP_USER);
755 if (!rule_buf)
756 return -ENOMEM;
757 }
758 }
759
760 ret = ops->get_rxnfc(dev, &info, rule_buf);
761 if (ret < 0)
762 goto err_out;
763
764 ret = -EFAULT;
765 if (copy_to_user(useraddr, &info, info_size))
766 goto err_out;
767
768 if (rule_buf) {
769 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
770 if (copy_to_user(useraddr, rule_buf,
771 info.rule_cnt * sizeof(u32)))
772 goto err_out;
773 }
774 ret = 0;
775
776err_out:
777 kfree(rule_buf);
778
779 return ret;
780}
781
782static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
783 void __user *useraddr)
784{
785 struct ethtool_rxfh_indir *indir;
786 u32 table_size;
787 size_t full_size;
788 int ret;
789
790 if (!dev->ethtool_ops->get_rxfh_indir)
791 return -EOPNOTSUPP;
792
793 if (copy_from_user(&table_size,
794 useraddr + offsetof(struct ethtool_rxfh_indir, size),
795 sizeof(table_size)))
796 return -EFAULT;
797
798 if (table_size >
799 (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
800 return -ENOMEM;
801 full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
802 indir = kzalloc(full_size, GFP_USER);
803 if (!indir)
804 return -ENOMEM;
805
806 indir->cmd = ETHTOOL_GRXFHINDIR;
807 indir->size = table_size;
808 ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
809 if (ret)
810 goto out;
811
812 if (copy_to_user(useraddr, indir, full_size))
813 ret = -EFAULT;
814
815out:
816 kfree(indir);
817 return ret;
818}
819
820static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
821 void __user *useraddr)
822{
823 struct ethtool_rxfh_indir *indir;
824 u32 table_size;
825 size_t full_size;
826 int ret;
827
828 if (!dev->ethtool_ops->set_rxfh_indir)
829 return -EOPNOTSUPP;
830
831 if (copy_from_user(&table_size,
832 useraddr + offsetof(struct ethtool_rxfh_indir, size),
833 sizeof(table_size)))
834 return -EFAULT;
835
836 if (table_size >
837 (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
838 return -ENOMEM;
839 full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
840 indir = kmalloc(full_size, GFP_USER);
841 if (!indir)
842 return -ENOMEM;
843
844 if (copy_from_user(indir, useraddr, full_size)) {
845 ret = -EFAULT;
846 goto out;
847 }
848
849 ret = dev->ethtool_ops->set_rxfh_indir(dev, indir);
850
851out:
852 kfree(indir);
853 return ret;
854}
855
856/*
857 * ethtool does not (or did not) set masks for flow parameters that are
858 * not specified, so if both value and mask are 0 then this must be
859 * treated as equivalent to a mask with all bits set. Implement that
860 * here rather than in drivers.
861 */
862static void rx_ntuple_fix_masks(struct ethtool_rx_ntuple_flow_spec *fs)
863{
864 struct ethtool_tcpip4_spec *entry = &fs->h_u.tcp_ip4_spec;
865 struct ethtool_tcpip4_spec *mask = &fs->m_u.tcp_ip4_spec;
866
867 if (fs->flow_type != TCP_V4_FLOW &&
868 fs->flow_type != UDP_V4_FLOW &&
869 fs->flow_type != SCTP_V4_FLOW)
870 return;
871
872 if (!(entry->ip4src | mask->ip4src))
873 mask->ip4src = htonl(0xffffffff);
874 if (!(entry->ip4dst | mask->ip4dst))
875 mask->ip4dst = htonl(0xffffffff);
876 if (!(entry->psrc | mask->psrc))
877 mask->psrc = htons(0xffff);
878 if (!(entry->pdst | mask->pdst))
879 mask->pdst = htons(0xffff);
880 if (!(entry->tos | mask->tos))
881 mask->tos = 0xff;
882 if (!(fs->vlan_tag | fs->vlan_tag_mask))
883 fs->vlan_tag_mask = 0xffff;
884 if (!(fs->data | fs->data_mask))
885 fs->data_mask = 0xffffffffffffffffULL;
886}
887
888static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev,
889 void __user *useraddr)
890{
891 struct ethtool_rx_ntuple cmd;
892 const struct ethtool_ops *ops = dev->ethtool_ops;
893
894 if (!ops->set_rx_ntuple)
895 return -EOPNOTSUPP;
896
897 if (!(dev->features & NETIF_F_NTUPLE))
898 return -EINVAL;
899
900 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
901 return -EFAULT;
902
903 rx_ntuple_fix_masks(&cmd.fs);
904
905 return ops->set_rx_ntuple(dev, &cmd);
906}
907
908static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
909{
910 struct ethtool_regs regs;
911 const struct ethtool_ops *ops = dev->ethtool_ops;
912 void *regbuf;
913 int reglen, ret;
914
915 if (!ops->get_regs || !ops->get_regs_len)
916 return -EOPNOTSUPP;
917
918 if (copy_from_user(®s, useraddr, sizeof(regs)))
919 return -EFAULT;
920
921 reglen = ops->get_regs_len(dev);
922 if (regs.len > reglen)
923 regs.len = reglen;
924
925 regbuf = vzalloc(reglen);
926 if (reglen && !regbuf)
927 return -ENOMEM;
928
929 ops->get_regs(dev, ®s, regbuf);
930
931 ret = -EFAULT;
932 if (copy_to_user(useraddr, ®s, sizeof(regs)))
933 goto out;
934 useraddr += offsetof(struct ethtool_regs, data);
935 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
936 goto out;
937 ret = 0;
938
939 out:
940 vfree(regbuf);
941 return ret;
942}
943
944static int ethtool_reset(struct net_device *dev, char __user *useraddr)
945{
946 struct ethtool_value reset;
947 int ret;
948
949 if (!dev->ethtool_ops->reset)
950 return -EOPNOTSUPP;
951
952 if (copy_from_user(&reset, useraddr, sizeof(reset)))
953 return -EFAULT;
954
955 ret = dev->ethtool_ops->reset(dev, &reset.data);
956 if (ret)
957 return ret;
958
959 if (copy_to_user(useraddr, &reset, sizeof(reset)))
960 return -EFAULT;
961 return 0;
962}
963
964static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
965{
966 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
967
968 if (!dev->ethtool_ops->get_wol)
969 return -EOPNOTSUPP;
970
971 dev->ethtool_ops->get_wol(dev, &wol);
972
973 if (copy_to_user(useraddr, &wol, sizeof(wol)))
974 return -EFAULT;
975 return 0;
976}
977
978static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
979{
980 struct ethtool_wolinfo wol;
981
982 if (!dev->ethtool_ops->set_wol)
983 return -EOPNOTSUPP;
984
985 if (copy_from_user(&wol, useraddr, sizeof(wol)))
986 return -EFAULT;
987
988 return dev->ethtool_ops->set_wol(dev, &wol);
989}
990
991static int ethtool_nway_reset(struct net_device *dev)
992{
993 if (!dev->ethtool_ops->nway_reset)
994 return -EOPNOTSUPP;
995
996 return dev->ethtool_ops->nway_reset(dev);
997}
998
999static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1000{
1001 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1002
1003 if (!dev->ethtool_ops->get_link)
1004 return -EOPNOTSUPP;
1005
1006 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1007
1008 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1009 return -EFAULT;
1010 return 0;
1011}
1012
1013static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1014{
1015 struct ethtool_eeprom eeprom;
1016 const struct ethtool_ops *ops = dev->ethtool_ops;
1017 void __user *userbuf = useraddr + sizeof(eeprom);
1018 u32 bytes_remaining;
1019 u8 *data;
1020 int ret = 0;
1021
1022 if (!ops->get_eeprom || !ops->get_eeprom_len)
1023 return -EOPNOTSUPP;
1024
1025 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1026 return -EFAULT;
1027
1028 /* Check for wrap and zero */
1029 if (eeprom.offset + eeprom.len <= eeprom.offset)
1030 return -EINVAL;
1031
1032 /* Check for exceeding total eeprom len */
1033 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1034 return -EINVAL;
1035
1036 data = kmalloc(PAGE_SIZE, GFP_USER);
1037 if (!data)
1038 return -ENOMEM;
1039
1040 bytes_remaining = eeprom.len;
1041 while (bytes_remaining > 0) {
1042 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1043
1044 ret = ops->get_eeprom(dev, &eeprom, data);
1045 if (ret)
1046 break;
1047 if (copy_to_user(userbuf, data, eeprom.len)) {
1048 ret = -EFAULT;
1049 break;
1050 }
1051 userbuf += eeprom.len;
1052 eeprom.offset += eeprom.len;
1053 bytes_remaining -= eeprom.len;
1054 }
1055
1056 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1057 eeprom.offset -= eeprom.len;
1058 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1059 ret = -EFAULT;
1060
1061 kfree(data);
1062 return ret;
1063}
1064
1065static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1066{
1067 struct ethtool_eeprom eeprom;
1068 const struct ethtool_ops *ops = dev->ethtool_ops;
1069 void __user *userbuf = useraddr + sizeof(eeprom);
1070 u32 bytes_remaining;
1071 u8 *data;
1072 int ret = 0;
1073
1074 if (!ops->set_eeprom || !ops->get_eeprom_len)
1075 return -EOPNOTSUPP;
1076
1077 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1078 return -EFAULT;
1079
1080 /* Check for wrap and zero */
1081 if (eeprom.offset + eeprom.len <= eeprom.offset)
1082 return -EINVAL;
1083
1084 /* Check for exceeding total eeprom len */
1085 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1086 return -EINVAL;
1087
1088 data = kmalloc(PAGE_SIZE, GFP_USER);
1089 if (!data)
1090 return -ENOMEM;
1091
1092 bytes_remaining = eeprom.len;
1093 while (bytes_remaining > 0) {
1094 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1095
1096 if (copy_from_user(data, userbuf, eeprom.len)) {
1097 ret = -EFAULT;
1098 break;
1099 }
1100 ret = ops->set_eeprom(dev, &eeprom, data);
1101 if (ret)
1102 break;
1103 userbuf += eeprom.len;
1104 eeprom.offset += eeprom.len;
1105 bytes_remaining -= eeprom.len;
1106 }
1107
1108 kfree(data);
1109 return ret;
1110}
1111
1112static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1113 void __user *useraddr)
1114{
1115 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1116
1117 if (!dev->ethtool_ops->get_coalesce)
1118 return -EOPNOTSUPP;
1119
1120 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1121
1122 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1123 return -EFAULT;
1124 return 0;
1125}
1126
1127static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1128 void __user *useraddr)
1129{
1130 struct ethtool_coalesce coalesce;
1131
1132 if (!dev->ethtool_ops->set_coalesce)
1133 return -EOPNOTSUPP;
1134
1135 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1136 return -EFAULT;
1137
1138 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1139}
1140
1141static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1142{
1143 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1144
1145 if (!dev->ethtool_ops->get_ringparam)
1146 return -EOPNOTSUPP;
1147
1148 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1149
1150 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1151 return -EFAULT;
1152 return 0;
1153}
1154
1155static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1156{
1157 struct ethtool_ringparam ringparam;
1158
1159 if (!dev->ethtool_ops->set_ringparam)
1160 return -EOPNOTSUPP;
1161
1162 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1163 return -EFAULT;
1164
1165 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1166}
1167
1168static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1169 void __user *useraddr)
1170{
1171 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1172
1173 if (!dev->ethtool_ops->get_channels)
1174 return -EOPNOTSUPP;
1175
1176 dev->ethtool_ops->get_channels(dev, &channels);
1177
1178 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1179 return -EFAULT;
1180 return 0;
1181}
1182
1183static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1184 void __user *useraddr)
1185{
1186 struct ethtool_channels channels;
1187
1188 if (!dev->ethtool_ops->set_channels)
1189 return -EOPNOTSUPP;
1190
1191 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1192 return -EFAULT;
1193
1194 return dev->ethtool_ops->set_channels(dev, &channels);
1195}
1196
1197static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1198{
1199 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1200
1201 if (!dev->ethtool_ops->get_pauseparam)
1202 return -EOPNOTSUPP;
1203
1204 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1205
1206 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1207 return -EFAULT;
1208 return 0;
1209}
1210
1211static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1212{
1213 struct ethtool_pauseparam pauseparam;
1214
1215 if (!dev->ethtool_ops->set_pauseparam)
1216 return -EOPNOTSUPP;
1217
1218 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1219 return -EFAULT;
1220
1221 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1222}
1223
1224static int __ethtool_set_sg(struct net_device *dev, u32 data)
1225{
1226 int err;
1227
1228 if (!dev->ethtool_ops->set_sg)
1229 return -EOPNOTSUPP;
1230
1231 if (data && !(dev->features & NETIF_F_ALL_CSUM))
1232 return -EINVAL;
1233
1234 if (!data && dev->ethtool_ops->set_tso) {
1235 err = dev->ethtool_ops->set_tso(dev, 0);
1236 if (err)
1237 return err;
1238 }
1239
1240 if (!data && dev->ethtool_ops->set_ufo) {
1241 err = dev->ethtool_ops->set_ufo(dev, 0);
1242 if (err)
1243 return err;
1244 }
1245 return dev->ethtool_ops->set_sg(dev, data);
1246}
1247
1248static int __ethtool_set_tx_csum(struct net_device *dev, u32 data)
1249{
1250 int err;
1251
1252 if (!dev->ethtool_ops->set_tx_csum)
1253 return -EOPNOTSUPP;
1254
1255 if (!data && dev->ethtool_ops->set_sg) {
1256 err = __ethtool_set_sg(dev, 0);
1257 if (err)
1258 return err;
1259 }
1260
1261 return dev->ethtool_ops->set_tx_csum(dev, data);
1262}
1263
1264static int __ethtool_set_rx_csum(struct net_device *dev, u32 data)
1265{
1266 if (!dev->ethtool_ops->set_rx_csum)
1267 return -EOPNOTSUPP;
1268
1269 if (!data)
1270 dev->features &= ~NETIF_F_GRO;
1271
1272 return dev->ethtool_ops->set_rx_csum(dev, data);
1273}
1274
1275static int __ethtool_set_tso(struct net_device *dev, u32 data)
1276{
1277 if (!dev->ethtool_ops->set_tso)
1278 return -EOPNOTSUPP;
1279
1280 if (data && !(dev->features & NETIF_F_SG))
1281 return -EINVAL;
1282
1283 return dev->ethtool_ops->set_tso(dev, data);
1284}
1285
1286static int __ethtool_set_ufo(struct net_device *dev, u32 data)
1287{
1288 if (!dev->ethtool_ops->set_ufo)
1289 return -EOPNOTSUPP;
1290 if (data && !(dev->features & NETIF_F_SG))
1291 return -EINVAL;
1292 if (data && !((dev->features & NETIF_F_GEN_CSUM) ||
1293 (dev->features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
1294 == (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)))
1295 return -EINVAL;
1296 return dev->ethtool_ops->set_ufo(dev, data);
1297}
1298
1299static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1300{
1301 struct ethtool_test test;
1302 const struct ethtool_ops *ops = dev->ethtool_ops;
1303 u64 *data;
1304 int ret, test_len;
1305
1306 if (!ops->self_test || !ops->get_sset_count)
1307 return -EOPNOTSUPP;
1308
1309 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1310 if (test_len < 0)
1311 return test_len;
1312 WARN_ON(test_len == 0);
1313
1314 if (copy_from_user(&test, useraddr, sizeof(test)))
1315 return -EFAULT;
1316
1317 test.len = test_len;
1318 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1319 if (!data)
1320 return -ENOMEM;
1321
1322 ops->self_test(dev, &test, data);
1323
1324 ret = -EFAULT;
1325 if (copy_to_user(useraddr, &test, sizeof(test)))
1326 goto out;
1327 useraddr += sizeof(test);
1328 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1329 goto out;
1330 ret = 0;
1331
1332 out:
1333 kfree(data);
1334 return ret;
1335}
1336
1337static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1338{
1339 struct ethtool_gstrings gstrings;
1340 u8 *data;
1341 int ret;
1342
1343 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1344 return -EFAULT;
1345
1346 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1347 if (ret < 0)
1348 return ret;
1349
1350 gstrings.len = ret;
1351
1352 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1353 if (!data)
1354 return -ENOMEM;
1355
1356 __ethtool_get_strings(dev, gstrings.string_set, data);
1357
1358 ret = -EFAULT;
1359 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1360 goto out;
1361 useraddr += sizeof(gstrings);
1362 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1363 goto out;
1364 ret = 0;
1365
1366out:
1367 kfree(data);
1368 return ret;
1369}
1370
1371static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1372{
1373 struct ethtool_value id;
1374 static bool busy;
1375 int rc;
1376
1377 if (!dev->ethtool_ops->set_phys_id)
1378 return -EOPNOTSUPP;
1379
1380 if (busy)
1381 return -EBUSY;
1382
1383 if (copy_from_user(&id, useraddr, sizeof(id)))
1384 return -EFAULT;
1385
1386 rc = dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1387 if (rc < 0)
1388 return rc;
1389
1390 /* Drop the RTNL lock while waiting, but prevent reentry or
1391 * removal of the device.
1392 */
1393 busy = true;
1394 dev_hold(dev);
1395 rtnl_unlock();
1396
1397 if (rc == 0) {
1398 /* Driver will handle this itself */
1399 schedule_timeout_interruptible(
1400 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1401 } else {
1402 /* Driver expects to be called at twice the frequency in rc */
1403 int n = rc * 2, i, interval = HZ / n;
1404
1405 /* Count down seconds */
1406 do {
1407 /* Count down iterations per second */
1408 i = n;
1409 do {
1410 rtnl_lock();
1411 rc = dev->ethtool_ops->set_phys_id(dev,
1412 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1413 rtnl_unlock();
1414 if (rc)
1415 break;
1416 schedule_timeout_interruptible(interval);
1417 } while (!signal_pending(current) && --i != 0);
1418 } while (!signal_pending(current) &&
1419 (id.data == 0 || --id.data != 0));
1420 }
1421
1422 rtnl_lock();
1423 dev_put(dev);
1424 busy = false;
1425
1426 (void)dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1427 return rc;
1428}
1429
1430static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1431{
1432 struct ethtool_stats stats;
1433 const struct ethtool_ops *ops = dev->ethtool_ops;
1434 u64 *data;
1435 int ret, n_stats;
1436
1437 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1438 return -EOPNOTSUPP;
1439
1440 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1441 if (n_stats < 0)
1442 return n_stats;
1443 WARN_ON(n_stats == 0);
1444
1445 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1446 return -EFAULT;
1447
1448 stats.n_stats = n_stats;
1449 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1450 if (!data)
1451 return -ENOMEM;
1452
1453 ops->get_ethtool_stats(dev, &stats, data);
1454
1455 ret = -EFAULT;
1456 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1457 goto out;
1458 useraddr += sizeof(stats);
1459 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1460 goto out;
1461 ret = 0;
1462
1463 out:
1464 kfree(data);
1465 return ret;
1466}
1467
1468static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1469{
1470 struct ethtool_perm_addr epaddr;
1471
1472 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1473 return -EFAULT;
1474
1475 if (epaddr.size < dev->addr_len)
1476 return -ETOOSMALL;
1477 epaddr.size = dev->addr_len;
1478
1479 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1480 return -EFAULT;
1481 useraddr += sizeof(epaddr);
1482 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1483 return -EFAULT;
1484 return 0;
1485}
1486
1487static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1488 u32 cmd, u32 (*actor)(struct net_device *))
1489{
1490 struct ethtool_value edata = { .cmd = cmd };
1491
1492 if (!actor)
1493 return -EOPNOTSUPP;
1494
1495 edata.data = actor(dev);
1496
1497 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1498 return -EFAULT;
1499 return 0;
1500}
1501
1502static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1503 void (*actor)(struct net_device *, u32))
1504{
1505 struct ethtool_value edata;
1506
1507 if (!actor)
1508 return -EOPNOTSUPP;
1509
1510 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1511 return -EFAULT;
1512
1513 actor(dev, edata.data);
1514 return 0;
1515}
1516
1517static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1518 int (*actor)(struct net_device *, u32))
1519{
1520 struct ethtool_value edata;
1521
1522 if (!actor)
1523 return -EOPNOTSUPP;
1524
1525 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1526 return -EFAULT;
1527
1528 return actor(dev, edata.data);
1529}
1530
1531static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1532 char __user *useraddr)
1533{
1534 struct ethtool_flash efl;
1535
1536 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1537 return -EFAULT;
1538
1539 if (!dev->ethtool_ops->flash_device)
1540 return -EOPNOTSUPP;
1541
1542 return dev->ethtool_ops->flash_device(dev, &efl);
1543}
1544
1545static int ethtool_set_dump(struct net_device *dev,
1546 void __user *useraddr)
1547{
1548 struct ethtool_dump dump;
1549
1550 if (!dev->ethtool_ops->set_dump)
1551 return -EOPNOTSUPP;
1552
1553 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1554 return -EFAULT;
1555
1556 return dev->ethtool_ops->set_dump(dev, &dump);
1557}
1558
1559static int ethtool_get_dump_flag(struct net_device *dev,
1560 void __user *useraddr)
1561{
1562 int ret;
1563 struct ethtool_dump dump;
1564 const struct ethtool_ops *ops = dev->ethtool_ops;
1565
1566 if (!dev->ethtool_ops->get_dump_flag)
1567 return -EOPNOTSUPP;
1568
1569 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1570 return -EFAULT;
1571
1572 ret = ops->get_dump_flag(dev, &dump);
1573 if (ret)
1574 return ret;
1575
1576 if (copy_to_user(useraddr, &dump, sizeof(dump)))
1577 return -EFAULT;
1578 return 0;
1579}
1580
1581static int ethtool_get_dump_data(struct net_device *dev,
1582 void __user *useraddr)
1583{
1584 int ret;
1585 __u32 len;
1586 struct ethtool_dump dump, tmp;
1587 const struct ethtool_ops *ops = dev->ethtool_ops;
1588 void *data = NULL;
1589
1590 if (!dev->ethtool_ops->get_dump_data ||
1591 !dev->ethtool_ops->get_dump_flag)
1592 return -EOPNOTSUPP;
1593
1594 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1595 return -EFAULT;
1596
1597 memset(&tmp, 0, sizeof(tmp));
1598 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
1599 ret = ops->get_dump_flag(dev, &tmp);
1600 if (ret)
1601 return ret;
1602
1603 len = (tmp.len > dump.len) ? dump.len : tmp.len;
1604 if (!len)
1605 return -EFAULT;
1606
1607 data = vzalloc(tmp.len);
1608 if (!data)
1609 return -ENOMEM;
1610 ret = ops->get_dump_data(dev, &dump, data);
1611 if (ret)
1612 goto out;
1613
1614 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
1615 ret = -EFAULT;
1616 goto out;
1617 }
1618 useraddr += offsetof(struct ethtool_dump, data);
1619 if (copy_to_user(useraddr, data, len))
1620 ret = -EFAULT;
1621out:
1622 vfree(data);
1623 return ret;
1624}
1625
1626/* The main entry point in this file. Called from net/core/dev.c */
1627
1628int dev_ethtool(struct net *net, struct ifreq *ifr)
1629{
1630 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1631 void __user *useraddr = ifr->ifr_data;
1632 u32 ethcmd;
1633 int rc;
1634 u32 old_features;
1635
1636 if (!dev || !netif_device_present(dev))
1637 return -ENODEV;
1638
1639 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
1640 return -EFAULT;
1641
1642 if (!dev->ethtool_ops) {
1643 /* ETHTOOL_GDRVINFO does not require any driver support.
1644 * It is also unprivileged and does not change anything,
1645 * so we can take a shortcut to it. */
1646 if (ethcmd == ETHTOOL_GDRVINFO)
1647 return ethtool_get_drvinfo(dev, useraddr);
1648 else
1649 return -EOPNOTSUPP;
1650 }
1651
1652 /* Allow some commands to be done by anyone */
1653 switch (ethcmd) {
1654 case ETHTOOL_GSET:
1655 case ETHTOOL_GDRVINFO:
1656 case ETHTOOL_GMSGLVL:
1657 case ETHTOOL_GCOALESCE:
1658 case ETHTOOL_GRINGPARAM:
1659 case ETHTOOL_GPAUSEPARAM:
1660 case ETHTOOL_GRXCSUM:
1661 case ETHTOOL_GTXCSUM:
1662 case ETHTOOL_GSG:
1663 case ETHTOOL_GSTRINGS:
1664 case ETHTOOL_GTSO:
1665 case ETHTOOL_GPERMADDR:
1666 case ETHTOOL_GUFO:
1667 case ETHTOOL_GGSO:
1668 case ETHTOOL_GGRO:
1669 case ETHTOOL_GFLAGS:
1670 case ETHTOOL_GPFLAGS:
1671 case ETHTOOL_GRXFH:
1672 case ETHTOOL_GRXRINGS:
1673 case ETHTOOL_GRXCLSRLCNT:
1674 case ETHTOOL_GRXCLSRULE:
1675 case ETHTOOL_GRXCLSRLALL:
1676 case ETHTOOL_GFEATURES:
1677 break;
1678 default:
1679 if (!capable(CAP_NET_ADMIN))
1680 return -EPERM;
1681 }
1682
1683 if (dev->ethtool_ops->begin) {
1684 rc = dev->ethtool_ops->begin(dev);
1685 if (rc < 0)
1686 return rc;
1687 }
1688 old_features = dev->features;
1689
1690 switch (ethcmd) {
1691 case ETHTOOL_GSET:
1692 rc = ethtool_get_settings(dev, useraddr);
1693 break;
1694 case ETHTOOL_SSET:
1695 rc = ethtool_set_settings(dev, useraddr);
1696 break;
1697 case ETHTOOL_GDRVINFO:
1698 rc = ethtool_get_drvinfo(dev, useraddr);
1699 break;
1700 case ETHTOOL_GREGS:
1701 rc = ethtool_get_regs(dev, useraddr);
1702 break;
1703 case ETHTOOL_GWOL:
1704 rc = ethtool_get_wol(dev, useraddr);
1705 break;
1706 case ETHTOOL_SWOL:
1707 rc = ethtool_set_wol(dev, useraddr);
1708 break;
1709 case ETHTOOL_GMSGLVL:
1710 rc = ethtool_get_value(dev, useraddr, ethcmd,
1711 dev->ethtool_ops->get_msglevel);
1712 break;
1713 case ETHTOOL_SMSGLVL:
1714 rc = ethtool_set_value_void(dev, useraddr,
1715 dev->ethtool_ops->set_msglevel);
1716 break;
1717 case ETHTOOL_NWAY_RST:
1718 rc = ethtool_nway_reset(dev);
1719 break;
1720 case ETHTOOL_GLINK:
1721 rc = ethtool_get_link(dev, useraddr);
1722 break;
1723 case ETHTOOL_GEEPROM:
1724 rc = ethtool_get_eeprom(dev, useraddr);
1725 break;
1726 case ETHTOOL_SEEPROM:
1727 rc = ethtool_set_eeprom(dev, useraddr);
1728 break;
1729 case ETHTOOL_GCOALESCE:
1730 rc = ethtool_get_coalesce(dev, useraddr);
1731 break;
1732 case ETHTOOL_SCOALESCE:
1733 rc = ethtool_set_coalesce(dev, useraddr);
1734 break;
1735 case ETHTOOL_GRINGPARAM:
1736 rc = ethtool_get_ringparam(dev, useraddr);
1737 break;
1738 case ETHTOOL_SRINGPARAM:
1739 rc = ethtool_set_ringparam(dev, useraddr);
1740 break;
1741 case ETHTOOL_GPAUSEPARAM:
1742 rc = ethtool_get_pauseparam(dev, useraddr);
1743 break;
1744 case ETHTOOL_SPAUSEPARAM:
1745 rc = ethtool_set_pauseparam(dev, useraddr);
1746 break;
1747 case ETHTOOL_TEST:
1748 rc = ethtool_self_test(dev, useraddr);
1749 break;
1750 case ETHTOOL_GSTRINGS:
1751 rc = ethtool_get_strings(dev, useraddr);
1752 break;
1753 case ETHTOOL_PHYS_ID:
1754 rc = ethtool_phys_id(dev, useraddr);
1755 break;
1756 case ETHTOOL_GSTATS:
1757 rc = ethtool_get_stats(dev, useraddr);
1758 break;
1759 case ETHTOOL_GPERMADDR:
1760 rc = ethtool_get_perm_addr(dev, useraddr);
1761 break;
1762 case ETHTOOL_GFLAGS:
1763 rc = ethtool_get_value(dev, useraddr, ethcmd,
1764 (dev->ethtool_ops->get_flags ?
1765 dev->ethtool_ops->get_flags :
1766 ethtool_op_get_flags));
1767 break;
1768 case ETHTOOL_SFLAGS:
1769 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
1770 break;
1771 case ETHTOOL_GPFLAGS:
1772 rc = ethtool_get_value(dev, useraddr, ethcmd,
1773 dev->ethtool_ops->get_priv_flags);
1774 break;
1775 case ETHTOOL_SPFLAGS:
1776 rc = ethtool_set_value(dev, useraddr,
1777 dev->ethtool_ops->set_priv_flags);
1778 break;
1779 case ETHTOOL_GRXFH:
1780 case ETHTOOL_GRXRINGS:
1781 case ETHTOOL_GRXCLSRLCNT:
1782 case ETHTOOL_GRXCLSRULE:
1783 case ETHTOOL_GRXCLSRLALL:
1784 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1785 break;
1786 case ETHTOOL_SRXFH:
1787 case ETHTOOL_SRXCLSRLDEL:
1788 case ETHTOOL_SRXCLSRLINS:
1789 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1790 break;
1791 case ETHTOOL_FLASHDEV:
1792 rc = ethtool_flash_device(dev, useraddr);
1793 break;
1794 case ETHTOOL_RESET:
1795 rc = ethtool_reset(dev, useraddr);
1796 break;
1797 case ETHTOOL_SRXNTUPLE:
1798 rc = ethtool_set_rx_ntuple(dev, useraddr);
1799 break;
1800 case ETHTOOL_GSSET_INFO:
1801 rc = ethtool_get_sset_info(dev, useraddr);
1802 break;
1803 case ETHTOOL_GRXFHINDIR:
1804 rc = ethtool_get_rxfh_indir(dev, useraddr);
1805 break;
1806 case ETHTOOL_SRXFHINDIR:
1807 rc = ethtool_set_rxfh_indir(dev, useraddr);
1808 break;
1809 case ETHTOOL_GFEATURES:
1810 rc = ethtool_get_features(dev, useraddr);
1811 break;
1812 case ETHTOOL_SFEATURES:
1813 rc = ethtool_set_features(dev, useraddr);
1814 break;
1815 case ETHTOOL_GTXCSUM:
1816 case ETHTOOL_GRXCSUM:
1817 case ETHTOOL_GSG:
1818 case ETHTOOL_GTSO:
1819 case ETHTOOL_GUFO:
1820 case ETHTOOL_GGSO:
1821 case ETHTOOL_GGRO:
1822 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
1823 break;
1824 case ETHTOOL_STXCSUM:
1825 case ETHTOOL_SRXCSUM:
1826 case ETHTOOL_SSG:
1827 case ETHTOOL_STSO:
1828 case ETHTOOL_SUFO:
1829 case ETHTOOL_SGSO:
1830 case ETHTOOL_SGRO:
1831 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
1832 break;
1833 case ETHTOOL_GCHANNELS:
1834 rc = ethtool_get_channels(dev, useraddr);
1835 break;
1836 case ETHTOOL_SCHANNELS:
1837 rc = ethtool_set_channels(dev, useraddr);
1838 break;
1839 case ETHTOOL_SET_DUMP:
1840 rc = ethtool_set_dump(dev, useraddr);
1841 break;
1842 case ETHTOOL_GET_DUMP_FLAG:
1843 rc = ethtool_get_dump_flag(dev, useraddr);
1844 break;
1845 case ETHTOOL_GET_DUMP_DATA:
1846 rc = ethtool_get_dump_data(dev, useraddr);
1847 break;
1848 default:
1849 rc = -EOPNOTSUPP;
1850 }
1851
1852 if (dev->ethtool_ops->complete)
1853 dev->ethtool_ops->complete(dev);
1854
1855 if (old_features != dev->features)
1856 netdev_features_change(dev);
1857
1858 return rc;
1859}