Linux kernel mirror (for testing)
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linux
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
572int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
573{
574 ASSERT_RTNL();
575
576 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
577 return -EOPNOTSUPP;
578
579 memset(cmd, 0, sizeof(struct ethtool_cmd));
580 cmd->cmd = ETHTOOL_GSET;
581 return dev->ethtool_ops->get_settings(dev, cmd);
582}
583EXPORT_SYMBOL(__ethtool_get_settings);
584
585static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
586{
587 int err;
588 struct ethtool_cmd cmd;
589
590 err = __ethtool_get_settings(dev, &cmd);
591 if (err < 0)
592 return err;
593
594 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
595 return -EFAULT;
596 return 0;
597}
598
599static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
600{
601 struct ethtool_cmd cmd;
602
603 if (!dev->ethtool_ops->set_settings)
604 return -EOPNOTSUPP;
605
606 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
607 return -EFAULT;
608
609 return dev->ethtool_ops->set_settings(dev, &cmd);
610}
611
612static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
613 void __user *useraddr)
614{
615 struct ethtool_drvinfo info;
616 const struct ethtool_ops *ops = dev->ethtool_ops;
617
618 memset(&info, 0, sizeof(info));
619 info.cmd = ETHTOOL_GDRVINFO;
620 if (ops && ops->get_drvinfo) {
621 ops->get_drvinfo(dev, &info);
622 } else if (dev->dev.parent && dev->dev.parent->driver) {
623 strlcpy(info.bus_info, dev_name(dev->dev.parent),
624 sizeof(info.bus_info));
625 strlcpy(info.driver, dev->dev.parent->driver->name,
626 sizeof(info.driver));
627 } else {
628 return -EOPNOTSUPP;
629 }
630
631 /*
632 * this method of obtaining string set info is deprecated;
633 * Use ETHTOOL_GSSET_INFO instead.
634 */
635 if (ops && ops->get_sset_count) {
636 int rc;
637
638 rc = ops->get_sset_count(dev, ETH_SS_TEST);
639 if (rc >= 0)
640 info.testinfo_len = rc;
641 rc = ops->get_sset_count(dev, ETH_SS_STATS);
642 if (rc >= 0)
643 info.n_stats = rc;
644 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
645 if (rc >= 0)
646 info.n_priv_flags = rc;
647 }
648 if (ops && ops->get_regs_len)
649 info.regdump_len = ops->get_regs_len(dev);
650 if (ops && ops->get_eeprom_len)
651 info.eedump_len = ops->get_eeprom_len(dev);
652
653 if (copy_to_user(useraddr, &info, sizeof(info)))
654 return -EFAULT;
655 return 0;
656}
657
658static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
659 void __user *useraddr)
660{
661 struct ethtool_sset_info info;
662 u64 sset_mask;
663 int i, idx = 0, n_bits = 0, ret, rc;
664 u32 *info_buf = NULL;
665
666 if (copy_from_user(&info, useraddr, sizeof(info)))
667 return -EFAULT;
668
669 /* store copy of mask, because we zero struct later on */
670 sset_mask = info.sset_mask;
671 if (!sset_mask)
672 return 0;
673
674 /* calculate size of return buffer */
675 n_bits = hweight64(sset_mask);
676
677 memset(&info, 0, sizeof(info));
678 info.cmd = ETHTOOL_GSSET_INFO;
679
680 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
681 if (!info_buf)
682 return -ENOMEM;
683
684 /*
685 * fill return buffer based on input bitmask and successful
686 * get_sset_count return
687 */
688 for (i = 0; i < 64; i++) {
689 if (!(sset_mask & (1ULL << i)))
690 continue;
691
692 rc = __ethtool_get_sset_count(dev, i);
693 if (rc >= 0) {
694 info.sset_mask |= (1ULL << i);
695 info_buf[idx++] = rc;
696 }
697 }
698
699 ret = -EFAULT;
700 if (copy_to_user(useraddr, &info, sizeof(info)))
701 goto out;
702
703 useraddr += offsetof(struct ethtool_sset_info, data);
704 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
705 goto out;
706
707 ret = 0;
708
709out:
710 kfree(info_buf);
711 return ret;
712}
713
714static noinline_for_stack int ethtool_set_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
720 if (!dev->ethtool_ops->set_rxnfc)
721 return -EOPNOTSUPP;
722
723 /* struct ethtool_rxnfc was originally defined for
724 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
725 * members. User-space might still be using that
726 * definition. */
727 if (cmd == ETHTOOL_SRXFH)
728 info_size = (offsetof(struct ethtool_rxnfc, data) +
729 sizeof(info.data));
730
731 if (copy_from_user(&info, useraddr, info_size))
732 return -EFAULT;
733
734 return dev->ethtool_ops->set_rxnfc(dev, &info);
735}
736
737static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
738 u32 cmd, void __user *useraddr)
739{
740 struct ethtool_rxnfc info;
741 size_t info_size = sizeof(info);
742 const struct ethtool_ops *ops = dev->ethtool_ops;
743 int ret;
744 void *rule_buf = NULL;
745
746 if (!ops->get_rxnfc)
747 return -EOPNOTSUPP;
748
749 /* struct ethtool_rxnfc was originally defined for
750 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
751 * members. User-space might still be using that
752 * definition. */
753 if (cmd == ETHTOOL_GRXFH)
754 info_size = (offsetof(struct ethtool_rxnfc, data) +
755 sizeof(info.data));
756
757 if (copy_from_user(&info, useraddr, info_size))
758 return -EFAULT;
759
760 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
761 if (info.rule_cnt > 0) {
762 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
763 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
764 GFP_USER);
765 if (!rule_buf)
766 return -ENOMEM;
767 }
768 }
769
770 ret = ops->get_rxnfc(dev, &info, rule_buf);
771 if (ret < 0)
772 goto err_out;
773
774 ret = -EFAULT;
775 if (copy_to_user(useraddr, &info, info_size))
776 goto err_out;
777
778 if (rule_buf) {
779 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
780 if (copy_to_user(useraddr, rule_buf,
781 info.rule_cnt * sizeof(u32)))
782 goto err_out;
783 }
784 ret = 0;
785
786err_out:
787 kfree(rule_buf);
788
789 return ret;
790}
791
792static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
793 void __user *useraddr)
794{
795 struct ethtool_rxfh_indir *indir;
796 u32 table_size;
797 size_t full_size;
798 int ret;
799
800 if (!dev->ethtool_ops->get_rxfh_indir)
801 return -EOPNOTSUPP;
802
803 if (copy_from_user(&table_size,
804 useraddr + offsetof(struct ethtool_rxfh_indir, size),
805 sizeof(table_size)))
806 return -EFAULT;
807
808 if (table_size >
809 (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
810 return -ENOMEM;
811 full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
812 indir = kzalloc(full_size, GFP_USER);
813 if (!indir)
814 return -ENOMEM;
815
816 indir->cmd = ETHTOOL_GRXFHINDIR;
817 indir->size = table_size;
818 ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
819 if (ret)
820 goto out;
821
822 if (copy_to_user(useraddr, indir, full_size))
823 ret = -EFAULT;
824
825out:
826 kfree(indir);
827 return ret;
828}
829
830static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
831 void __user *useraddr)
832{
833 struct ethtool_rxfh_indir *indir;
834 u32 table_size;
835 size_t full_size;
836 int ret;
837
838 if (!dev->ethtool_ops->set_rxfh_indir)
839 return -EOPNOTSUPP;
840
841 if (copy_from_user(&table_size,
842 useraddr + offsetof(struct ethtool_rxfh_indir, size),
843 sizeof(table_size)))
844 return -EFAULT;
845
846 if (table_size >
847 (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
848 return -ENOMEM;
849 full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
850 indir = kmalloc(full_size, GFP_USER);
851 if (!indir)
852 return -ENOMEM;
853
854 if (copy_from_user(indir, useraddr, full_size)) {
855 ret = -EFAULT;
856 goto out;
857 }
858
859 ret = dev->ethtool_ops->set_rxfh_indir(dev, indir);
860
861out:
862 kfree(indir);
863 return ret;
864}
865
866/*
867 * ethtool does not (or did not) set masks for flow parameters that are
868 * not specified, so if both value and mask are 0 then this must be
869 * treated as equivalent to a mask with all bits set. Implement that
870 * here rather than in drivers.
871 */
872static void rx_ntuple_fix_masks(struct ethtool_rx_ntuple_flow_spec *fs)
873{
874 struct ethtool_tcpip4_spec *entry = &fs->h_u.tcp_ip4_spec;
875 struct ethtool_tcpip4_spec *mask = &fs->m_u.tcp_ip4_spec;
876
877 if (fs->flow_type != TCP_V4_FLOW &&
878 fs->flow_type != UDP_V4_FLOW &&
879 fs->flow_type != SCTP_V4_FLOW)
880 return;
881
882 if (!(entry->ip4src | mask->ip4src))
883 mask->ip4src = htonl(0xffffffff);
884 if (!(entry->ip4dst | mask->ip4dst))
885 mask->ip4dst = htonl(0xffffffff);
886 if (!(entry->psrc | mask->psrc))
887 mask->psrc = htons(0xffff);
888 if (!(entry->pdst | mask->pdst))
889 mask->pdst = htons(0xffff);
890 if (!(entry->tos | mask->tos))
891 mask->tos = 0xff;
892 if (!(fs->vlan_tag | fs->vlan_tag_mask))
893 fs->vlan_tag_mask = 0xffff;
894 if (!(fs->data | fs->data_mask))
895 fs->data_mask = 0xffffffffffffffffULL;
896}
897
898static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev,
899 void __user *useraddr)
900{
901 struct ethtool_rx_ntuple cmd;
902 const struct ethtool_ops *ops = dev->ethtool_ops;
903
904 if (!ops->set_rx_ntuple)
905 return -EOPNOTSUPP;
906
907 if (!(dev->features & NETIF_F_NTUPLE))
908 return -EINVAL;
909
910 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
911 return -EFAULT;
912
913 rx_ntuple_fix_masks(&cmd.fs);
914
915 return ops->set_rx_ntuple(dev, &cmd);
916}
917
918static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
919{
920 struct ethtool_regs regs;
921 const struct ethtool_ops *ops = dev->ethtool_ops;
922 void *regbuf;
923 int reglen, ret;
924
925 if (!ops->get_regs || !ops->get_regs_len)
926 return -EOPNOTSUPP;
927
928 if (copy_from_user(®s, useraddr, sizeof(regs)))
929 return -EFAULT;
930
931 reglen = ops->get_regs_len(dev);
932 if (regs.len > reglen)
933 regs.len = reglen;
934
935 regbuf = vzalloc(reglen);
936 if (reglen && !regbuf)
937 return -ENOMEM;
938
939 ops->get_regs(dev, ®s, regbuf);
940
941 ret = -EFAULT;
942 if (copy_to_user(useraddr, ®s, sizeof(regs)))
943 goto out;
944 useraddr += offsetof(struct ethtool_regs, data);
945 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
946 goto out;
947 ret = 0;
948
949 out:
950 vfree(regbuf);
951 return ret;
952}
953
954static int ethtool_reset(struct net_device *dev, char __user *useraddr)
955{
956 struct ethtool_value reset;
957 int ret;
958
959 if (!dev->ethtool_ops->reset)
960 return -EOPNOTSUPP;
961
962 if (copy_from_user(&reset, useraddr, sizeof(reset)))
963 return -EFAULT;
964
965 ret = dev->ethtool_ops->reset(dev, &reset.data);
966 if (ret)
967 return ret;
968
969 if (copy_to_user(useraddr, &reset, sizeof(reset)))
970 return -EFAULT;
971 return 0;
972}
973
974static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
975{
976 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
977
978 if (!dev->ethtool_ops->get_wol)
979 return -EOPNOTSUPP;
980
981 dev->ethtool_ops->get_wol(dev, &wol);
982
983 if (copy_to_user(useraddr, &wol, sizeof(wol)))
984 return -EFAULT;
985 return 0;
986}
987
988static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
989{
990 struct ethtool_wolinfo wol;
991
992 if (!dev->ethtool_ops->set_wol)
993 return -EOPNOTSUPP;
994
995 if (copy_from_user(&wol, useraddr, sizeof(wol)))
996 return -EFAULT;
997
998 return dev->ethtool_ops->set_wol(dev, &wol);
999}
1000
1001static int ethtool_nway_reset(struct net_device *dev)
1002{
1003 if (!dev->ethtool_ops->nway_reset)
1004 return -EOPNOTSUPP;
1005
1006 return dev->ethtool_ops->nway_reset(dev);
1007}
1008
1009static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1010{
1011 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1012
1013 if (!dev->ethtool_ops->get_link)
1014 return -EOPNOTSUPP;
1015
1016 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1017
1018 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1019 return -EFAULT;
1020 return 0;
1021}
1022
1023static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1024{
1025 struct ethtool_eeprom eeprom;
1026 const struct ethtool_ops *ops = dev->ethtool_ops;
1027 void __user *userbuf = useraddr + sizeof(eeprom);
1028 u32 bytes_remaining;
1029 u8 *data;
1030 int ret = 0;
1031
1032 if (!ops->get_eeprom || !ops->get_eeprom_len)
1033 return -EOPNOTSUPP;
1034
1035 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1036 return -EFAULT;
1037
1038 /* Check for wrap and zero */
1039 if (eeprom.offset + eeprom.len <= eeprom.offset)
1040 return -EINVAL;
1041
1042 /* Check for exceeding total eeprom len */
1043 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1044 return -EINVAL;
1045
1046 data = kmalloc(PAGE_SIZE, GFP_USER);
1047 if (!data)
1048 return -ENOMEM;
1049
1050 bytes_remaining = eeprom.len;
1051 while (bytes_remaining > 0) {
1052 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1053
1054 ret = ops->get_eeprom(dev, &eeprom, data);
1055 if (ret)
1056 break;
1057 if (copy_to_user(userbuf, data, eeprom.len)) {
1058 ret = -EFAULT;
1059 break;
1060 }
1061 userbuf += eeprom.len;
1062 eeprom.offset += eeprom.len;
1063 bytes_remaining -= eeprom.len;
1064 }
1065
1066 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1067 eeprom.offset -= eeprom.len;
1068 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1069 ret = -EFAULT;
1070
1071 kfree(data);
1072 return ret;
1073}
1074
1075static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1076{
1077 struct ethtool_eeprom eeprom;
1078 const struct ethtool_ops *ops = dev->ethtool_ops;
1079 void __user *userbuf = useraddr + sizeof(eeprom);
1080 u32 bytes_remaining;
1081 u8 *data;
1082 int ret = 0;
1083
1084 if (!ops->set_eeprom || !ops->get_eeprom_len)
1085 return -EOPNOTSUPP;
1086
1087 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1088 return -EFAULT;
1089
1090 /* Check for wrap and zero */
1091 if (eeprom.offset + eeprom.len <= eeprom.offset)
1092 return -EINVAL;
1093
1094 /* Check for exceeding total eeprom len */
1095 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1096 return -EINVAL;
1097
1098 data = kmalloc(PAGE_SIZE, GFP_USER);
1099 if (!data)
1100 return -ENOMEM;
1101
1102 bytes_remaining = eeprom.len;
1103 while (bytes_remaining > 0) {
1104 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1105
1106 if (copy_from_user(data, userbuf, eeprom.len)) {
1107 ret = -EFAULT;
1108 break;
1109 }
1110 ret = ops->set_eeprom(dev, &eeprom, data);
1111 if (ret)
1112 break;
1113 userbuf += eeprom.len;
1114 eeprom.offset += eeprom.len;
1115 bytes_remaining -= eeprom.len;
1116 }
1117
1118 kfree(data);
1119 return ret;
1120}
1121
1122static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1123 void __user *useraddr)
1124{
1125 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1126
1127 if (!dev->ethtool_ops->get_coalesce)
1128 return -EOPNOTSUPP;
1129
1130 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1131
1132 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1133 return -EFAULT;
1134 return 0;
1135}
1136
1137static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1138 void __user *useraddr)
1139{
1140 struct ethtool_coalesce coalesce;
1141
1142 if (!dev->ethtool_ops->set_coalesce)
1143 return -EOPNOTSUPP;
1144
1145 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1146 return -EFAULT;
1147
1148 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1149}
1150
1151static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1152{
1153 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1154
1155 if (!dev->ethtool_ops->get_ringparam)
1156 return -EOPNOTSUPP;
1157
1158 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1159
1160 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1161 return -EFAULT;
1162 return 0;
1163}
1164
1165static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1166{
1167 struct ethtool_ringparam ringparam;
1168
1169 if (!dev->ethtool_ops->set_ringparam)
1170 return -EOPNOTSUPP;
1171
1172 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1173 return -EFAULT;
1174
1175 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1176}
1177
1178static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1179 void __user *useraddr)
1180{
1181 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1182
1183 if (!dev->ethtool_ops->get_channels)
1184 return -EOPNOTSUPP;
1185
1186 dev->ethtool_ops->get_channels(dev, &channels);
1187
1188 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1189 return -EFAULT;
1190 return 0;
1191}
1192
1193static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1194 void __user *useraddr)
1195{
1196 struct ethtool_channels channels;
1197
1198 if (!dev->ethtool_ops->set_channels)
1199 return -EOPNOTSUPP;
1200
1201 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1202 return -EFAULT;
1203
1204 return dev->ethtool_ops->set_channels(dev, &channels);
1205}
1206
1207static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1208{
1209 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1210
1211 if (!dev->ethtool_ops->get_pauseparam)
1212 return -EOPNOTSUPP;
1213
1214 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1215
1216 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1217 return -EFAULT;
1218 return 0;
1219}
1220
1221static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1222{
1223 struct ethtool_pauseparam pauseparam;
1224
1225 if (!dev->ethtool_ops->set_pauseparam)
1226 return -EOPNOTSUPP;
1227
1228 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1229 return -EFAULT;
1230
1231 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1232}
1233
1234static int __ethtool_set_sg(struct net_device *dev, u32 data)
1235{
1236 int err;
1237
1238 if (!dev->ethtool_ops->set_sg)
1239 return -EOPNOTSUPP;
1240
1241 if (data && !(dev->features & NETIF_F_ALL_CSUM))
1242 return -EINVAL;
1243
1244 if (!data && dev->ethtool_ops->set_tso) {
1245 err = dev->ethtool_ops->set_tso(dev, 0);
1246 if (err)
1247 return err;
1248 }
1249
1250 if (!data && dev->ethtool_ops->set_ufo) {
1251 err = dev->ethtool_ops->set_ufo(dev, 0);
1252 if (err)
1253 return err;
1254 }
1255 return dev->ethtool_ops->set_sg(dev, data);
1256}
1257
1258static int __ethtool_set_tx_csum(struct net_device *dev, u32 data)
1259{
1260 int err;
1261
1262 if (!dev->ethtool_ops->set_tx_csum)
1263 return -EOPNOTSUPP;
1264
1265 if (!data && dev->ethtool_ops->set_sg) {
1266 err = __ethtool_set_sg(dev, 0);
1267 if (err)
1268 return err;
1269 }
1270
1271 return dev->ethtool_ops->set_tx_csum(dev, data);
1272}
1273
1274static int __ethtool_set_rx_csum(struct net_device *dev, u32 data)
1275{
1276 if (!dev->ethtool_ops->set_rx_csum)
1277 return -EOPNOTSUPP;
1278
1279 if (!data)
1280 dev->features &= ~NETIF_F_GRO;
1281
1282 return dev->ethtool_ops->set_rx_csum(dev, data);
1283}
1284
1285static int __ethtool_set_tso(struct net_device *dev, u32 data)
1286{
1287 if (!dev->ethtool_ops->set_tso)
1288 return -EOPNOTSUPP;
1289
1290 if (data && !(dev->features & NETIF_F_SG))
1291 return -EINVAL;
1292
1293 return dev->ethtool_ops->set_tso(dev, data);
1294}
1295
1296static int __ethtool_set_ufo(struct net_device *dev, u32 data)
1297{
1298 if (!dev->ethtool_ops->set_ufo)
1299 return -EOPNOTSUPP;
1300 if (data && !(dev->features & NETIF_F_SG))
1301 return -EINVAL;
1302 if (data && !((dev->features & NETIF_F_GEN_CSUM) ||
1303 (dev->features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
1304 == (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)))
1305 return -EINVAL;
1306 return dev->ethtool_ops->set_ufo(dev, data);
1307}
1308
1309static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1310{
1311 struct ethtool_test test;
1312 const struct ethtool_ops *ops = dev->ethtool_ops;
1313 u64 *data;
1314 int ret, test_len;
1315
1316 if (!ops->self_test || !ops->get_sset_count)
1317 return -EOPNOTSUPP;
1318
1319 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1320 if (test_len < 0)
1321 return test_len;
1322 WARN_ON(test_len == 0);
1323
1324 if (copy_from_user(&test, useraddr, sizeof(test)))
1325 return -EFAULT;
1326
1327 test.len = test_len;
1328 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1329 if (!data)
1330 return -ENOMEM;
1331
1332 ops->self_test(dev, &test, data);
1333
1334 ret = -EFAULT;
1335 if (copy_to_user(useraddr, &test, sizeof(test)))
1336 goto out;
1337 useraddr += sizeof(test);
1338 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1339 goto out;
1340 ret = 0;
1341
1342 out:
1343 kfree(data);
1344 return ret;
1345}
1346
1347static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1348{
1349 struct ethtool_gstrings gstrings;
1350 u8 *data;
1351 int ret;
1352
1353 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1354 return -EFAULT;
1355
1356 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1357 if (ret < 0)
1358 return ret;
1359
1360 gstrings.len = ret;
1361
1362 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1363 if (!data)
1364 return -ENOMEM;
1365
1366 __ethtool_get_strings(dev, gstrings.string_set, data);
1367
1368 ret = -EFAULT;
1369 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1370 goto out;
1371 useraddr += sizeof(gstrings);
1372 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1373 goto out;
1374 ret = 0;
1375
1376out:
1377 kfree(data);
1378 return ret;
1379}
1380
1381static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1382{
1383 struct ethtool_value id;
1384 static bool busy;
1385 int rc;
1386
1387 if (!dev->ethtool_ops->set_phys_id)
1388 return -EOPNOTSUPP;
1389
1390 if (busy)
1391 return -EBUSY;
1392
1393 if (copy_from_user(&id, useraddr, sizeof(id)))
1394 return -EFAULT;
1395
1396 rc = dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1397 if (rc < 0)
1398 return rc;
1399
1400 /* Drop the RTNL lock while waiting, but prevent reentry or
1401 * removal of the device.
1402 */
1403 busy = true;
1404 dev_hold(dev);
1405 rtnl_unlock();
1406
1407 if (rc == 0) {
1408 /* Driver will handle this itself */
1409 schedule_timeout_interruptible(
1410 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1411 } else {
1412 /* Driver expects to be called at twice the frequency in rc */
1413 int n = rc * 2, i, interval = HZ / n;
1414
1415 /* Count down seconds */
1416 do {
1417 /* Count down iterations per second */
1418 i = n;
1419 do {
1420 rtnl_lock();
1421 rc = dev->ethtool_ops->set_phys_id(dev,
1422 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1423 rtnl_unlock();
1424 if (rc)
1425 break;
1426 schedule_timeout_interruptible(interval);
1427 } while (!signal_pending(current) && --i != 0);
1428 } while (!signal_pending(current) &&
1429 (id.data == 0 || --id.data != 0));
1430 }
1431
1432 rtnl_lock();
1433 dev_put(dev);
1434 busy = false;
1435
1436 (void)dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1437 return rc;
1438}
1439
1440static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1441{
1442 struct ethtool_stats stats;
1443 const struct ethtool_ops *ops = dev->ethtool_ops;
1444 u64 *data;
1445 int ret, n_stats;
1446
1447 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1448 return -EOPNOTSUPP;
1449
1450 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1451 if (n_stats < 0)
1452 return n_stats;
1453 WARN_ON(n_stats == 0);
1454
1455 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1456 return -EFAULT;
1457
1458 stats.n_stats = n_stats;
1459 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1460 if (!data)
1461 return -ENOMEM;
1462
1463 ops->get_ethtool_stats(dev, &stats, data);
1464
1465 ret = -EFAULT;
1466 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1467 goto out;
1468 useraddr += sizeof(stats);
1469 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1470 goto out;
1471 ret = 0;
1472
1473 out:
1474 kfree(data);
1475 return ret;
1476}
1477
1478static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1479{
1480 struct ethtool_perm_addr epaddr;
1481
1482 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1483 return -EFAULT;
1484
1485 if (epaddr.size < dev->addr_len)
1486 return -ETOOSMALL;
1487 epaddr.size = dev->addr_len;
1488
1489 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1490 return -EFAULT;
1491 useraddr += sizeof(epaddr);
1492 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1493 return -EFAULT;
1494 return 0;
1495}
1496
1497static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1498 u32 cmd, u32 (*actor)(struct net_device *))
1499{
1500 struct ethtool_value edata = { .cmd = cmd };
1501
1502 if (!actor)
1503 return -EOPNOTSUPP;
1504
1505 edata.data = actor(dev);
1506
1507 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1508 return -EFAULT;
1509 return 0;
1510}
1511
1512static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1513 void (*actor)(struct net_device *, u32))
1514{
1515 struct ethtool_value edata;
1516
1517 if (!actor)
1518 return -EOPNOTSUPP;
1519
1520 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1521 return -EFAULT;
1522
1523 actor(dev, edata.data);
1524 return 0;
1525}
1526
1527static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1528 int (*actor)(struct net_device *, u32))
1529{
1530 struct ethtool_value edata;
1531
1532 if (!actor)
1533 return -EOPNOTSUPP;
1534
1535 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1536 return -EFAULT;
1537
1538 return actor(dev, edata.data);
1539}
1540
1541static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1542 char __user *useraddr)
1543{
1544 struct ethtool_flash efl;
1545
1546 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1547 return -EFAULT;
1548
1549 if (!dev->ethtool_ops->flash_device)
1550 return -EOPNOTSUPP;
1551
1552 return dev->ethtool_ops->flash_device(dev, &efl);
1553}
1554
1555static int ethtool_set_dump(struct net_device *dev,
1556 void __user *useraddr)
1557{
1558 struct ethtool_dump dump;
1559
1560 if (!dev->ethtool_ops->set_dump)
1561 return -EOPNOTSUPP;
1562
1563 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1564 return -EFAULT;
1565
1566 return dev->ethtool_ops->set_dump(dev, &dump);
1567}
1568
1569static int ethtool_get_dump_flag(struct net_device *dev,
1570 void __user *useraddr)
1571{
1572 int ret;
1573 struct ethtool_dump dump;
1574 const struct ethtool_ops *ops = dev->ethtool_ops;
1575
1576 if (!dev->ethtool_ops->get_dump_flag)
1577 return -EOPNOTSUPP;
1578
1579 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1580 return -EFAULT;
1581
1582 ret = ops->get_dump_flag(dev, &dump);
1583 if (ret)
1584 return ret;
1585
1586 if (copy_to_user(useraddr, &dump, sizeof(dump)))
1587 return -EFAULT;
1588 return 0;
1589}
1590
1591static int ethtool_get_dump_data(struct net_device *dev,
1592 void __user *useraddr)
1593{
1594 int ret;
1595 __u32 len;
1596 struct ethtool_dump dump, tmp;
1597 const struct ethtool_ops *ops = dev->ethtool_ops;
1598 void *data = NULL;
1599
1600 if (!dev->ethtool_ops->get_dump_data ||
1601 !dev->ethtool_ops->get_dump_flag)
1602 return -EOPNOTSUPP;
1603
1604 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1605 return -EFAULT;
1606
1607 memset(&tmp, 0, sizeof(tmp));
1608 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
1609 ret = ops->get_dump_flag(dev, &tmp);
1610 if (ret)
1611 return ret;
1612
1613 len = (tmp.len > dump.len) ? dump.len : tmp.len;
1614 if (!len)
1615 return -EFAULT;
1616
1617 data = vzalloc(tmp.len);
1618 if (!data)
1619 return -ENOMEM;
1620 ret = ops->get_dump_data(dev, &dump, data);
1621 if (ret)
1622 goto out;
1623
1624 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
1625 ret = -EFAULT;
1626 goto out;
1627 }
1628 useraddr += offsetof(struct ethtool_dump, data);
1629 if (copy_to_user(useraddr, data, len))
1630 ret = -EFAULT;
1631out:
1632 vfree(data);
1633 return ret;
1634}
1635
1636/* The main entry point in this file. Called from net/core/dev.c */
1637
1638int dev_ethtool(struct net *net, struct ifreq *ifr)
1639{
1640 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1641 void __user *useraddr = ifr->ifr_data;
1642 u32 ethcmd;
1643 int rc;
1644 u32 old_features;
1645
1646 if (!dev || !netif_device_present(dev))
1647 return -ENODEV;
1648
1649 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
1650 return -EFAULT;
1651
1652 if (!dev->ethtool_ops) {
1653 /* ETHTOOL_GDRVINFO does not require any driver support.
1654 * It is also unprivileged and does not change anything,
1655 * so we can take a shortcut to it. */
1656 if (ethcmd == ETHTOOL_GDRVINFO)
1657 return ethtool_get_drvinfo(dev, useraddr);
1658 else
1659 return -EOPNOTSUPP;
1660 }
1661
1662 /* Allow some commands to be done by anyone */
1663 switch (ethcmd) {
1664 case ETHTOOL_GSET:
1665 case ETHTOOL_GDRVINFO:
1666 case ETHTOOL_GMSGLVL:
1667 case ETHTOOL_GCOALESCE:
1668 case ETHTOOL_GRINGPARAM:
1669 case ETHTOOL_GPAUSEPARAM:
1670 case ETHTOOL_GRXCSUM:
1671 case ETHTOOL_GTXCSUM:
1672 case ETHTOOL_GSG:
1673 case ETHTOOL_GSTRINGS:
1674 case ETHTOOL_GTSO:
1675 case ETHTOOL_GPERMADDR:
1676 case ETHTOOL_GUFO:
1677 case ETHTOOL_GGSO:
1678 case ETHTOOL_GGRO:
1679 case ETHTOOL_GFLAGS:
1680 case ETHTOOL_GPFLAGS:
1681 case ETHTOOL_GRXFH:
1682 case ETHTOOL_GRXRINGS:
1683 case ETHTOOL_GRXCLSRLCNT:
1684 case ETHTOOL_GRXCLSRULE:
1685 case ETHTOOL_GRXCLSRLALL:
1686 case ETHTOOL_GFEATURES:
1687 break;
1688 default:
1689 if (!capable(CAP_NET_ADMIN))
1690 return -EPERM;
1691 }
1692
1693 if (dev->ethtool_ops->begin) {
1694 rc = dev->ethtool_ops->begin(dev);
1695 if (rc < 0)
1696 return rc;
1697 }
1698 old_features = dev->features;
1699
1700 switch (ethcmd) {
1701 case ETHTOOL_GSET:
1702 rc = ethtool_get_settings(dev, useraddr);
1703 break;
1704 case ETHTOOL_SSET:
1705 rc = ethtool_set_settings(dev, useraddr);
1706 break;
1707 case ETHTOOL_GDRVINFO:
1708 rc = ethtool_get_drvinfo(dev, useraddr);
1709 break;
1710 case ETHTOOL_GREGS:
1711 rc = ethtool_get_regs(dev, useraddr);
1712 break;
1713 case ETHTOOL_GWOL:
1714 rc = ethtool_get_wol(dev, useraddr);
1715 break;
1716 case ETHTOOL_SWOL:
1717 rc = ethtool_set_wol(dev, useraddr);
1718 break;
1719 case ETHTOOL_GMSGLVL:
1720 rc = ethtool_get_value(dev, useraddr, ethcmd,
1721 dev->ethtool_ops->get_msglevel);
1722 break;
1723 case ETHTOOL_SMSGLVL:
1724 rc = ethtool_set_value_void(dev, useraddr,
1725 dev->ethtool_ops->set_msglevel);
1726 break;
1727 case ETHTOOL_NWAY_RST:
1728 rc = ethtool_nway_reset(dev);
1729 break;
1730 case ETHTOOL_GLINK:
1731 rc = ethtool_get_link(dev, useraddr);
1732 break;
1733 case ETHTOOL_GEEPROM:
1734 rc = ethtool_get_eeprom(dev, useraddr);
1735 break;
1736 case ETHTOOL_SEEPROM:
1737 rc = ethtool_set_eeprom(dev, useraddr);
1738 break;
1739 case ETHTOOL_GCOALESCE:
1740 rc = ethtool_get_coalesce(dev, useraddr);
1741 break;
1742 case ETHTOOL_SCOALESCE:
1743 rc = ethtool_set_coalesce(dev, useraddr);
1744 break;
1745 case ETHTOOL_GRINGPARAM:
1746 rc = ethtool_get_ringparam(dev, useraddr);
1747 break;
1748 case ETHTOOL_SRINGPARAM:
1749 rc = ethtool_set_ringparam(dev, useraddr);
1750 break;
1751 case ETHTOOL_GPAUSEPARAM:
1752 rc = ethtool_get_pauseparam(dev, useraddr);
1753 break;
1754 case ETHTOOL_SPAUSEPARAM:
1755 rc = ethtool_set_pauseparam(dev, useraddr);
1756 break;
1757 case ETHTOOL_TEST:
1758 rc = ethtool_self_test(dev, useraddr);
1759 break;
1760 case ETHTOOL_GSTRINGS:
1761 rc = ethtool_get_strings(dev, useraddr);
1762 break;
1763 case ETHTOOL_PHYS_ID:
1764 rc = ethtool_phys_id(dev, useraddr);
1765 break;
1766 case ETHTOOL_GSTATS:
1767 rc = ethtool_get_stats(dev, useraddr);
1768 break;
1769 case ETHTOOL_GPERMADDR:
1770 rc = ethtool_get_perm_addr(dev, useraddr);
1771 break;
1772 case ETHTOOL_GFLAGS:
1773 rc = ethtool_get_value(dev, useraddr, ethcmd,
1774 (dev->ethtool_ops->get_flags ?
1775 dev->ethtool_ops->get_flags :
1776 ethtool_op_get_flags));
1777 break;
1778 case ETHTOOL_SFLAGS:
1779 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
1780 break;
1781 case ETHTOOL_GPFLAGS:
1782 rc = ethtool_get_value(dev, useraddr, ethcmd,
1783 dev->ethtool_ops->get_priv_flags);
1784 break;
1785 case ETHTOOL_SPFLAGS:
1786 rc = ethtool_set_value(dev, useraddr,
1787 dev->ethtool_ops->set_priv_flags);
1788 break;
1789 case ETHTOOL_GRXFH:
1790 case ETHTOOL_GRXRINGS:
1791 case ETHTOOL_GRXCLSRLCNT:
1792 case ETHTOOL_GRXCLSRULE:
1793 case ETHTOOL_GRXCLSRLALL:
1794 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1795 break;
1796 case ETHTOOL_SRXFH:
1797 case ETHTOOL_SRXCLSRLDEL:
1798 case ETHTOOL_SRXCLSRLINS:
1799 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1800 break;
1801 case ETHTOOL_FLASHDEV:
1802 rc = ethtool_flash_device(dev, useraddr);
1803 break;
1804 case ETHTOOL_RESET:
1805 rc = ethtool_reset(dev, useraddr);
1806 break;
1807 case ETHTOOL_SRXNTUPLE:
1808 rc = ethtool_set_rx_ntuple(dev, useraddr);
1809 break;
1810 case ETHTOOL_GSSET_INFO:
1811 rc = ethtool_get_sset_info(dev, useraddr);
1812 break;
1813 case ETHTOOL_GRXFHINDIR:
1814 rc = ethtool_get_rxfh_indir(dev, useraddr);
1815 break;
1816 case ETHTOOL_SRXFHINDIR:
1817 rc = ethtool_set_rxfh_indir(dev, useraddr);
1818 break;
1819 case ETHTOOL_GFEATURES:
1820 rc = ethtool_get_features(dev, useraddr);
1821 break;
1822 case ETHTOOL_SFEATURES:
1823 rc = ethtool_set_features(dev, useraddr);
1824 break;
1825 case ETHTOOL_GTXCSUM:
1826 case ETHTOOL_GRXCSUM:
1827 case ETHTOOL_GSG:
1828 case ETHTOOL_GTSO:
1829 case ETHTOOL_GUFO:
1830 case ETHTOOL_GGSO:
1831 case ETHTOOL_GGRO:
1832 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
1833 break;
1834 case ETHTOOL_STXCSUM:
1835 case ETHTOOL_SRXCSUM:
1836 case ETHTOOL_SSG:
1837 case ETHTOOL_STSO:
1838 case ETHTOOL_SUFO:
1839 case ETHTOOL_SGSO:
1840 case ETHTOOL_SGRO:
1841 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
1842 break;
1843 case ETHTOOL_GCHANNELS:
1844 rc = ethtool_get_channels(dev, useraddr);
1845 break;
1846 case ETHTOOL_SCHANNELS:
1847 rc = ethtool_set_channels(dev, useraddr);
1848 break;
1849 case ETHTOOL_SET_DUMP:
1850 rc = ethtool_set_dump(dev, useraddr);
1851 break;
1852 case ETHTOOL_GET_DUMP_FLAG:
1853 rc = ethtool_get_dump_flag(dev, useraddr);
1854 break;
1855 case ETHTOOL_GET_DUMP_DATA:
1856 rc = ethtool_get_dump_data(dev, useraddr);
1857 break;
1858 default:
1859 rc = -EOPNOTSUPP;
1860 }
1861
1862 if (dev->ethtool_ops->complete)
1863 dev->ethtool_ops->complete(dev);
1864
1865 if (old_features != dev->features)
1866 netdev_features_change(dev);
1867
1868 return rc;
1869}