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Merge branch 'for-linus' of git://git.o-hand.com/linux-mfd
[linux.git] / net / core / ethtool.c
CommitLineData
1da177e4
LT		 1/*
2 * net/core/ethtool.c - Ethtool ioctl handler
3 * Copyright (c) 2003 Matthew Wilcox <[email protected]>
4 *
5 * This file is where we call all the ethtool_ops commands to get
61a44b9c 6 * the information ethtool needs.
1da177e4 7 *
61a44b9c
MW		 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.
1da177e4
LT		 12 */
13
14#include <linux/module.h>
15#include <linux/types.h>
4fc268d2 16#include <linux/capability.h>
1da177e4
LT		 17#include <linux/errno.h>
18#include <linux/ethtool.h>
19#include <linux/netdevice.h>
20#include <asm/uaccess.h>
21
4ec93edb 22/*
1da177e4
LT		 23 * Some useful ethtool_ops methods that're device independent.
24 * If we find that all drivers want to do the same thing here,
25 * we can turn these into dev_() function calls.
26 */
27
28u32 ethtool_op_get_link(struct net_device *dev)
29{
30 return netif_carrier_ok(dev) ? 1 : 0;
31}
32
33u32 ethtool_op_get_tx_csum(struct net_device *dev)
34{
8648b305 35 return (dev->features & NETIF_F_ALL_CSUM) != 0;
1da177e4
LT		 36}
37
38int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
39{
40 if (data)
41 dev->features |= NETIF_F_IP_CSUM;
42 else
43 dev->features &= ~NETIF_F_IP_CSUM;
44
45 return 0;
46}
47
69f6a0fa
JM		 48int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
49{
50 if (data)
51 dev->features |= NETIF_F_HW_CSUM;
52 else
53 dev->features &= ~NETIF_F_HW_CSUM;
54
55 return 0;
56}
6460d948
MC		 57
58int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
59{
60 if (data)
61 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
62 else
63 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
64
65 return 0;
66}
67
1da177e4
LT		 68u32 ethtool_op_get_sg(struct net_device *dev)
69{
70 return (dev->features & NETIF_F_SG) != 0;
71}
72
73int ethtool_op_set_sg(struct net_device *dev, u32 data)
74{
75 if (data)
76 dev->features |= NETIF_F_SG;
77 else
78 dev->features &= ~NETIF_F_SG;
79
80 return 0;
81}
82
83u32 ethtool_op_get_tso(struct net_device *dev)
84{
85 return (dev->features & NETIF_F_TSO) != 0;
86}
87
88int ethtool_op_set_tso(struct net_device *dev, u32 data)
89{
90 if (data)
91 dev->features |= NETIF_F_TSO;
92 else
93 dev->features &= ~NETIF_F_TSO;
94
95 return 0;
96}
97
e89e9cf5
AR		 98u32 ethtool_op_get_ufo(struct net_device *dev)
99{
100 return (dev->features & NETIF_F_UFO) != 0;
101}
102
103int ethtool_op_set_ufo(struct net_device *dev, u32 data)
104{
105 if (data)
106 dev->features |= NETIF_F_UFO;
107 else
108 dev->features &= ~NETIF_F_UFO;
109 return 0;
110}
111
3ae7c0b2
JG		 112/* the following list of flags are the same as their associated
113 * NETIF_F_xxx values in include/linux/netdevice.h
114 */
115static const u32 flags_dup_features =
116 ETH_FLAG_LRO;
117
118u32 ethtool_op_get_flags(struct net_device *dev)
119{
120 /* in the future, this function will probably contain additional
121 * handling for flags which are not so easily handled
122 * by a simple masking operation
123 */
124
125 return dev->features & flags_dup_features;
126}
127
128int ethtool_op_set_flags(struct net_device *dev, u32 data)
129{
130 if (data & ETH_FLAG_LRO)
131 dev->features |= NETIF_F_LRO;
132 else
133 dev->features &= ~NETIF_F_LRO;
134
135 return 0;
136}
137
1da177e4
LT		 138/* Handlers for each ethtool command */
139
140static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
141{
142 struct ethtool_cmd cmd = { ETHTOOL_GSET };
143 int err;
144
145 if (!dev->ethtool_ops->get_settings)
146 return -EOPNOTSUPP;
147
148 err = dev->ethtool_ops->get_settings(dev, &cmd);
149 if (err < 0)
150 return err;
151
152 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
153 return -EFAULT;
154 return 0;
155}
156
157static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
158{
159 struct ethtool_cmd cmd;
160
161 if (!dev->ethtool_ops->set_settings)
162 return -EOPNOTSUPP;
163
164 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
165 return -EFAULT;
166
167 return dev->ethtool_ops->set_settings(dev, &cmd);
168}
169
170static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
171{
172 struct ethtool_drvinfo info;
76fd8593 173 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 174
175 if (!ops->get_drvinfo)
176 return -EOPNOTSUPP;
177
178 memset(&info, 0, sizeof(info));
179 info.cmd = ETHTOOL_GDRVINFO;
180 ops->get_drvinfo(dev, &info);
181
ff03d49f
JG		 182 if (ops->get_sset_count) {
183 int rc;
184
185 rc = ops->get_sset_count(dev, ETH_SS_TEST);
186 if (rc >= 0)
187 info.testinfo_len = rc;
188 rc = ops->get_sset_count(dev, ETH_SS_STATS);
189 if (rc >= 0)
190 info.n_stats = rc;
339bf024
JG		 191 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
192 if (rc >= 0)
193 info.n_priv_flags = rc;
ff03d49f
JG		 194 } else {
195 /* code path for obsolete hooks */
196
197 if (ops->self_test_count)
198 info.testinfo_len = ops->self_test_count(dev);
199 if (ops->get_stats_count)
200 info.n_stats = ops->get_stats_count(dev);
201 }
1da177e4
LT		 202 if (ops->get_regs_len)
203 info.regdump_len = ops->get_regs_len(dev);
204 if (ops->get_eeprom_len)
205 info.eedump_len = ops->get_eeprom_len(dev);
206
207 if (copy_to_user(useraddr, &info, sizeof(info)))
208 return -EFAULT;
209 return 0;
210}
211
0853ad66
SB		 212static int ethtool_set_rxhash(struct net_device *dev, void __user *useraddr)
213{
214 struct ethtool_rxnfc cmd;
215
216 if (!dev->ethtool_ops->set_rxhash)
217 return -EOPNOTSUPP;
218
219 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
220 return -EFAULT;
221
222 return dev->ethtool_ops->set_rxhash(dev, &cmd);
223}
224
225static int ethtool_get_rxhash(struct net_device *dev, void __user *useraddr)
226{
227 struct ethtool_rxnfc info;
228
229 if (!dev->ethtool_ops->get_rxhash)
230 return -EOPNOTSUPP;
231
232 if (copy_from_user(&info, useraddr, sizeof(info)))
233 return -EFAULT;
234
235 dev->ethtool_ops->get_rxhash(dev, &info);
236
237 if (copy_to_user(useraddr, &info, sizeof(info)))
238 return -EFAULT;
239 return 0;
240}
241
1da177e4
LT		 242static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
243{
244 struct ethtool_regs regs;
76fd8593 245 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 246 void *regbuf;
247 int reglen, ret;
248
249 if (!ops->get_regs || !ops->get_regs_len)
250 return -EOPNOTSUPP;
251
252 if (copy_from_user(&regs, useraddr, sizeof(regs)))
253 return -EFAULT;
254
255 reglen = ops->get_regs_len(dev);
256 if (regs.len > reglen)
257 regs.len = reglen;
258
259 regbuf = kmalloc(reglen, GFP_USER);
260 if (!regbuf)
261 return -ENOMEM;
262
263 ops->get_regs(dev, &regs, regbuf);
264
265 ret = -EFAULT;
266 if (copy_to_user(useraddr, &regs, sizeof(regs)))
267 goto out;
268 useraddr += offsetof(struct ethtool_regs, data);
269 if (copy_to_user(useraddr, regbuf, regs.len))
270 goto out;
271 ret = 0;
272
273 out:
274 kfree(regbuf);
275 return ret;
276}
277
278static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
279{
280 struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
281
282 if (!dev->ethtool_ops->get_wol)
283 return -EOPNOTSUPP;
284
285 dev->ethtool_ops->get_wol(dev, &wol);
286
287 if (copy_to_user(useraddr, &wol, sizeof(wol)))
288 return -EFAULT;
289 return 0;
290}
291
292static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
293{
294 struct ethtool_wolinfo wol;
295
296 if (!dev->ethtool_ops->set_wol)
297 return -EOPNOTSUPP;
298
299 if (copy_from_user(&wol, useraddr, sizeof(wol)))
300 return -EFAULT;
301
302 return dev->ethtool_ops->set_wol(dev, &wol);
303}
304
1da177e4
LT		 305static int ethtool_nway_reset(struct net_device *dev)
306{
307 if (!dev->ethtool_ops->nway_reset)
308 return -EOPNOTSUPP;
309
310 return dev->ethtool_ops->nway_reset(dev);
311}
312
1da177e4
LT		 313static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
314{
315 struct ethtool_eeprom eeprom;
76fd8593 316 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 317 void __user *userbuf = useraddr + sizeof(eeprom);
318 u32 bytes_remaining;
1da177e4 319 u8 *data;
b131dd5d 320 int ret = 0;
1da177e4
LT		 321
322 if (!ops->get_eeprom || !ops->get_eeprom_len)
323 return -EOPNOTSUPP;
324
325 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
326 return -EFAULT;
327
328 /* Check for wrap and zero */
329 if (eeprom.offset + eeprom.len <= eeprom.offset)
330 return -EINVAL;
331
332 /* Check for exceeding total eeprom len */
333 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
334 return -EINVAL;
335
b131dd5d 336 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 337 if (!data)
338 return -ENOMEM;
339
b131dd5d
MSB		 340 bytes_remaining = eeprom.len;
341 while (bytes_remaining > 0) {
342 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
343
344 ret = ops->get_eeprom(dev, &eeprom, data);
345 if (ret)
346 break;
347 if (copy_to_user(userbuf, data, eeprom.len)) {
348 ret = -EFAULT;
349 break;
350 }
351 userbuf += eeprom.len;
352 eeprom.offset += eeprom.len;
353 bytes_remaining -= eeprom.len;
354 }
1da177e4 355
c5835df9
MSB		 356 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
357 eeprom.offset -= eeprom.len;
358 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
359 ret = -EFAULT;
360
1da177e4
LT		 361 kfree(data);
362 return ret;
363}
364
365static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
366{
367 struct ethtool_eeprom eeprom;
76fd8593 368 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 369 void __user *userbuf = useraddr + sizeof(eeprom);
370 u32 bytes_remaining;
1da177e4 371 u8 *data;
b131dd5d 372 int ret = 0;
1da177e4
LT		 373
374 if (!ops->set_eeprom || !ops->get_eeprom_len)
375 return -EOPNOTSUPP;
376
377 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
378 return -EFAULT;
379
380 /* Check for wrap and zero */
381 if (eeprom.offset + eeprom.len <= eeprom.offset)
382 return -EINVAL;
383
384 /* Check for exceeding total eeprom len */
385 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
386 return -EINVAL;
387
b131dd5d 388 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 389 if (!data)
390 return -ENOMEM;
391
b131dd5d
MSB		 392 bytes_remaining = eeprom.len;
393 while (bytes_remaining > 0) {
394 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
395
396 if (copy_from_user(data, userbuf, eeprom.len)) {
397 ret = -EFAULT;
398 break;
399 }
400 ret = ops->set_eeprom(dev, &eeprom, data);
401 if (ret)
402 break;
403 userbuf += eeprom.len;
404 eeprom.offset += eeprom.len;
405 bytes_remaining -= eeprom.len;
406 }
1da177e4 407
1da177e4
LT		 408 kfree(data);
409 return ret;
410}
411
412static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
413{
414 struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
415
416 if (!dev->ethtool_ops->get_coalesce)
417 return -EOPNOTSUPP;
418
419 dev->ethtool_ops->get_coalesce(dev, &coalesce);
420
421 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
422 return -EFAULT;
423 return 0;
424}
425
426static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
427{
428 struct ethtool_coalesce coalesce;
429
fa04ae5c 430 if (!dev->ethtool_ops->set_coalesce)
1da177e4
LT		 431 return -EOPNOTSUPP;
432
433 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
434 return -EFAULT;
435
436 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
437}
438
439static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
440{
441 struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
442
443 if (!dev->ethtool_ops->get_ringparam)
444 return -EOPNOTSUPP;
445
446 dev->ethtool_ops->get_ringparam(dev, &ringparam);
447
448 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
449 return -EFAULT;
450 return 0;
451}
452
453static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
454{
455 struct ethtool_ringparam ringparam;
456
457 if (!dev->ethtool_ops->set_ringparam)
458 return -EOPNOTSUPP;
459
460 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
461 return -EFAULT;
462
463 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
464}
465
466static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
467{
468 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
469
470 if (!dev->ethtool_ops->get_pauseparam)
471 return -EOPNOTSUPP;
472
473 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
474
475 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
476 return -EFAULT;
477 return 0;
478}
479
480static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
481{
482 struct ethtool_pauseparam pauseparam;
483
e1b90c41 484 if (!dev->ethtool_ops->set_pauseparam)
1da177e4
LT		 485 return -EOPNOTSUPP;
486
487 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
488 return -EFAULT;
489
490 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
491}
492
1da177e4
LT		 493static int __ethtool_set_sg(struct net_device *dev, u32 data)
494{
495 int err;
496
497 if (!data && dev->ethtool_ops->set_tso) {
498 err = dev->ethtool_ops->set_tso(dev, 0);
499 if (err)
500 return err;
501 }
502
e89e9cf5
AR		 503 if (!data && dev->ethtool_ops->set_ufo) {
504 err = dev->ethtool_ops->set_ufo(dev, 0);
505 if (err)
506 return err;
507 }
1da177e4
LT		 508 return dev->ethtool_ops->set_sg(dev, data);
509}
510
511static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
512{
513 struct ethtool_value edata;
514 int err;
515
516 if (!dev->ethtool_ops->set_tx_csum)
517 return -EOPNOTSUPP;
518
519 if (copy_from_user(&edata, useraddr, sizeof(edata)))
520 return -EFAULT;
521
522 if (!edata.data && dev->ethtool_ops->set_sg) {
523 err = __ethtool_set_sg(dev, 0);
524 if (err)
525 return err;
526 }
527
528 return dev->ethtool_ops->set_tx_csum(dev, edata.data);
529}
530
b240a0e5
HX		 531static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
532{
533 struct ethtool_value edata;
534
535 if (!dev->ethtool_ops->set_rx_csum)
536 return -EOPNOTSUPP;
537
538 if (copy_from_user(&edata, useraddr, sizeof(edata)))
539 return -EFAULT;
540
541 if (!edata.data && dev->ethtool_ops->set_sg)
542 dev->features &= ~NETIF_F_GRO;
543
544 return dev->ethtool_ops->set_rx_csum(dev, edata.data);
545}
546
1da177e4
LT		 547static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
548{
549 struct ethtool_value edata;
550
551 if (!dev->ethtool_ops->set_sg)
552 return -EOPNOTSUPP;
553
554 if (copy_from_user(&edata, useraddr, sizeof(edata)))
555 return -EFAULT;
556
4ec93edb 557 if (edata.data &&
8648b305 558 !(dev->features & NETIF_F_ALL_CSUM))
1da177e4
LT		 559 return -EINVAL;
560
561 return __ethtool_set_sg(dev, edata.data);
562}
563
1da177e4
LT		 564static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
565{
566 struct ethtool_value edata;
567
568 if (!dev->ethtool_ops->set_tso)
569 return -EOPNOTSUPP;
570
571 if (copy_from_user(&edata, useraddr, sizeof(edata)))
572 return -EFAULT;
573
574 if (edata.data && !(dev->features & NETIF_F_SG))
575 return -EINVAL;
576
577 return dev->ethtool_ops->set_tso(dev, edata.data);
578}
579
e89e9cf5
AR		 580static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
581{
582 struct ethtool_value edata;
583
584 if (!dev->ethtool_ops->set_ufo)
585 return -EOPNOTSUPP;
586 if (copy_from_user(&edata, useraddr, sizeof(edata)))
587 return -EFAULT;
588 if (edata.data && !(dev->features & NETIF_F_SG))
589 return -EINVAL;
590 if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
591 return -EINVAL;
592 return dev->ethtool_ops->set_ufo(dev, edata.data);
593}
594
37c3185a
HX		 595static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
596{
597 struct ethtool_value edata = { ETHTOOL_GGSO };
598
599 edata.data = dev->features & NETIF_F_GSO;
600 if (copy_to_user(useraddr, &edata, sizeof(edata)))
601 return -EFAULT;
602 return 0;
603}
604
605static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
606{
607 struct ethtool_value edata;
608
609 if (copy_from_user(&edata, useraddr, sizeof(edata)))
610 return -EFAULT;
611 if (edata.data)
612 dev->features |= NETIF_F_GSO;
613 else
614 dev->features &= ~NETIF_F_GSO;
615 return 0;
616}
617
b240a0e5
HX		 618static int ethtool_get_gro(struct net_device *dev, char __user *useraddr)
619{
620 struct ethtool_value edata = { ETHTOOL_GGRO };
621
622 edata.data = dev->features & NETIF_F_GRO;
623 if (copy_to_user(useraddr, &edata, sizeof(edata)))
624 return -EFAULT;
625 return 0;
626}
627
628static int ethtool_set_gro(struct net_device *dev, char __user *useraddr)
629{
630 struct ethtool_value edata;
631
632 if (copy_from_user(&edata, useraddr, sizeof(edata)))
633 return -EFAULT;
634
635 if (edata.data) {
636 if (!dev->ethtool_ops->get_rx_csum ||
637 !dev->ethtool_ops->get_rx_csum(dev))
638 return -EINVAL;
639 dev->features |= NETIF_F_GRO;
640 } else
641 dev->features &= ~NETIF_F_GRO;
642
643 return 0;
644}
645
1da177e4
LT		 646static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
647{
648 struct ethtool_test test;
76fd8593 649 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 650 u64 *data;
ff03d49f 651 int ret, test_len;
1da177e4 652
ff03d49f
JG		 653 if (!ops->self_test)
654 return -EOPNOTSUPP;
655 if (!ops->get_sset_count && !ops->self_test_count)
1da177e4
LT		 656 return -EOPNOTSUPP;
657
ff03d49f
JG		 658 if (ops->get_sset_count)
659 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
660 else
661 /* code path for obsolete hook */
662 test_len = ops->self_test_count(dev);
663 if (test_len < 0)
664 return test_len;
665 WARN_ON(test_len == 0);
666
1da177e4
LT		 667 if (copy_from_user(&test, useraddr, sizeof(test)))
668 return -EFAULT;
669
ff03d49f
JG		 670 test.len = test_len;
671 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1da177e4
LT		 672 if (!data)
673 return -ENOMEM;
674
675 ops->self_test(dev, &test, data);
676
677 ret = -EFAULT;
678 if (copy_to_user(useraddr, &test, sizeof(test)))
679 goto out;
680 useraddr += sizeof(test);
681 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
682 goto out;
683 ret = 0;
684
685 out:
686 kfree(data);
687 return ret;
688}
689
690static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
691{
692 struct ethtool_gstrings gstrings;
76fd8593 693 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 694 u8 *data;
695 int ret;
696
697 if (!ops->get_strings)
698 return -EOPNOTSUPP;
699
700 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
701 return -EFAULT;
702
ff03d49f
JG		 703 if (ops->get_sset_count) {
704 ret = ops->get_sset_count(dev, gstrings.string_set);
705 if (ret < 0)
706 return ret;
707
708 gstrings.len = ret;
709 } else {
710 /* code path for obsolete hooks */
711
712 switch (gstrings.string_set) {
713 case ETH_SS_TEST:
714 if (!ops->self_test_count)
715 return -EOPNOTSUPP;
716 gstrings.len = ops->self_test_count(dev);
717 break;
718 case ETH_SS_STATS:
719 if (!ops->get_stats_count)
720 return -EOPNOTSUPP;
721 gstrings.len = ops->get_stats_count(dev);
722 break;
723 default:
724 return -EINVAL;
725 }
1da177e4
LT		 726 }
727
728 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
729 if (!data)
730 return -ENOMEM;
731
732 ops->get_strings(dev, gstrings.string_set, data);
733
734 ret = -EFAULT;
735 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
736 goto out;
737 useraddr += sizeof(gstrings);
738 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
739 goto out;
740 ret = 0;
741
742 out:
743 kfree(data);
744 return ret;
745}
746
747static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
748{
749 struct ethtool_value id;
750
751 if (!dev->ethtool_ops->phys_id)
752 return -EOPNOTSUPP;
753
754 if (copy_from_user(&id, useraddr, sizeof(id)))
755 return -EFAULT;
756
757 return dev->ethtool_ops->phys_id(dev, id.data);
758}
759
760static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
761{
762 struct ethtool_stats stats;
76fd8593 763 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 764 u64 *data;
ff03d49f 765 int ret, n_stats;
1da177e4 766
ff03d49f
JG		 767 if (!ops->get_ethtool_stats)
768 return -EOPNOTSUPP;
769 if (!ops->get_sset_count && !ops->get_stats_count)
1da177e4
LT		 770 return -EOPNOTSUPP;
771
ff03d49f
JG		 772 if (ops->get_sset_count)
773 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
774 else
775 /* code path for obsolete hook */
776 n_stats = ops->get_stats_count(dev);
777 if (n_stats < 0)
778 return n_stats;
779 WARN_ON(n_stats == 0);
780
1da177e4
LT		 781 if (copy_from_user(&stats, useraddr, sizeof(stats)))
782 return -EFAULT;
783
ff03d49f
JG		 784 stats.n_stats = n_stats;
785 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1da177e4
LT		 786 if (!data)
787 return -ENOMEM;
788
789 ops->get_ethtool_stats(dev, &stats, data);
790
791 ret = -EFAULT;
792 if (copy_to_user(useraddr, &stats, sizeof(stats)))
793 goto out;
794 useraddr += sizeof(stats);
795 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
796 goto out;
797 ret = 0;
798
799 out:
800 kfree(data);
801 return ret;
802}
803
0bf0519d 804static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
a6f9a705
JW		 805{
806 struct ethtool_perm_addr epaddr;
a6f9a705 807
313674af 808 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
a6f9a705
JW		 809 return -EFAULT;
810
313674af
MW		 811 if (epaddr.size < dev->addr_len)
812 return -ETOOSMALL;
813 epaddr.size = dev->addr_len;
a6f9a705 814
a6f9a705 815 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
313674af 816 return -EFAULT;
a6f9a705 817 useraddr += sizeof(epaddr);
313674af
MW		 818 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
819 return -EFAULT;
820 return 0;
a6f9a705
JW		 821}
822
13c99b24
JG		 823static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
824 u32 cmd, u32 (*actor)(struct net_device *))
3ae7c0b2 825{
13c99b24 826 struct ethtool_value edata = { cmd };
3ae7c0b2 827
13c99b24 828 if (!actor)
3ae7c0b2
JG		 829 return -EOPNOTSUPP;
830
13c99b24 831 edata.data = actor(dev);
3ae7c0b2
JG		 832
833 if (copy_to_user(useraddr, &edata, sizeof(edata)))
834 return -EFAULT;
835 return 0;
836}
837
13c99b24
JG		 838static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
839 void (*actor)(struct net_device *, u32))
3ae7c0b2
JG		 840{
841 struct ethtool_value edata;
842
13c99b24 843 if (!actor)
3ae7c0b2
JG		 844 return -EOPNOTSUPP;
845
846 if (copy_from_user(&edata, useraddr, sizeof(edata)))
847 return -EFAULT;
848
13c99b24 849 actor(dev, edata.data);
339bf024
JG		 850 return 0;
851}
852
13c99b24
JG		 853static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
854 int (*actor)(struct net_device *, u32))
339bf024
JG		 855{
856 struct ethtool_value edata;
857
13c99b24 858 if (!actor)
339bf024
JG		 859 return -EOPNOTSUPP;
860
861 if (copy_from_user(&edata, useraddr, sizeof(edata)))
862 return -EFAULT;
863
13c99b24 864 return actor(dev, edata.data);
339bf024
JG		 865}
866
1da177e4
LT		 867/* The main entry point in this file. Called from net/core/dev.c */
868
881d966b 869int dev_ethtool(struct net *net, struct ifreq *ifr)
1da177e4 870{
881d966b 871 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1da177e4
LT		 872 void __user *useraddr = ifr->ifr_data;
873 u32 ethcmd;
874 int rc;
81e81575 875 unsigned long old_features;
1da177e4 876
1da177e4
LT		 877 if (!dev || !netif_device_present(dev))
878 return -ENODEV;
879
880 if (!dev->ethtool_ops)
61a44b9c 881 return -EOPNOTSUPP;
1da177e4
LT		 882
883 if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
884 return -EFAULT;
885
75f3123c
SH		 886 /* Allow some commands to be done by anyone */
887 switch(ethcmd) {
75f3123c 888 case ETHTOOL_GDRVINFO:
75f3123c 889 case ETHTOOL_GMSGLVL:
75f3123c
SH		 890 case ETHTOOL_GCOALESCE:
891 case ETHTOOL_GRINGPARAM:
892 case ETHTOOL_GPAUSEPARAM:
893 case ETHTOOL_GRXCSUM:
894 case ETHTOOL_GTXCSUM:
895 case ETHTOOL_GSG:
896 case ETHTOOL_GSTRINGS:
75f3123c
SH		 897 case ETHTOOL_GTSO:
898 case ETHTOOL_GPERMADDR:
899 case ETHTOOL_GUFO:
900 case ETHTOOL_GGSO:
339bf024
JG		 901 case ETHTOOL_GFLAGS:
902 case ETHTOOL_GPFLAGS:
0853ad66 903 case ETHTOOL_GRXFH:
75f3123c
SH		 904 break;
905 default:
906 if (!capable(CAP_NET_ADMIN))
907 return -EPERM;
908 }
909
e71a4783 910 if (dev->ethtool_ops->begin)
1da177e4
LT		 911 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
912 return rc;
913
d8a33ac4
SH		 914 old_features = dev->features;
915
1da177e4
LT		 916 switch (ethcmd) {
917 case ETHTOOL_GSET:
918 rc = ethtool_get_settings(dev, useraddr);
919 break;
920 case ETHTOOL_SSET:
921 rc = ethtool_set_settings(dev, useraddr);
922 break;
923 case ETHTOOL_GDRVINFO:
924 rc = ethtool_get_drvinfo(dev, useraddr);
1da177e4
LT		 925 break;
926 case ETHTOOL_GREGS:
927 rc = ethtool_get_regs(dev, useraddr);
928 break;
929 case ETHTOOL_GWOL:
930 rc = ethtool_get_wol(dev, useraddr);
931 break;
932 case ETHTOOL_SWOL:
933 rc = ethtool_set_wol(dev, useraddr);
934 break;
935 case ETHTOOL_GMSGLVL:
13c99b24
JG		 936 rc = ethtool_get_value(dev, useraddr, ethcmd,
937 dev->ethtool_ops->get_msglevel);
1da177e4
LT		 938 break;
939 case ETHTOOL_SMSGLVL:
13c99b24
JG		 940 rc = ethtool_set_value_void(dev, useraddr,
941 dev->ethtool_ops->set_msglevel);
1da177e4
LT		 942 break;
943 case ETHTOOL_NWAY_RST:
944 rc = ethtool_nway_reset(dev);
945 break;
946 case ETHTOOL_GLINK:
13c99b24
JG		 947 rc = ethtool_get_value(dev, useraddr, ethcmd,
948 dev->ethtool_ops->get_link);
1da177e4
LT		 949 break;
950 case ETHTOOL_GEEPROM:
951 rc = ethtool_get_eeprom(dev, useraddr);
952 break;
953 case ETHTOOL_SEEPROM:
954 rc = ethtool_set_eeprom(dev, useraddr);
955 break;
956 case ETHTOOL_GCOALESCE:
957 rc = ethtool_get_coalesce(dev, useraddr);
958 break;
959 case ETHTOOL_SCOALESCE:
960 rc = ethtool_set_coalesce(dev, useraddr);
961 break;
962 case ETHTOOL_GRINGPARAM:
963 rc = ethtool_get_ringparam(dev, useraddr);
964 break;
965 case ETHTOOL_SRINGPARAM:
966 rc = ethtool_set_ringparam(dev, useraddr);
967 break;
968 case ETHTOOL_GPAUSEPARAM:
969 rc = ethtool_get_pauseparam(dev, useraddr);
970 break;
971 case ETHTOOL_SPAUSEPARAM:
972 rc = ethtool_set_pauseparam(dev, useraddr);
973 break;
974 case ETHTOOL_GRXCSUM:
13c99b24
JG		 975 rc = ethtool_get_value(dev, useraddr, ethcmd,
976 dev->ethtool_ops->get_rx_csum);
1da177e4
LT		 977 break;
978 case ETHTOOL_SRXCSUM:
b240a0e5 979 rc = ethtool_set_rx_csum(dev, useraddr);
1da177e4
LT		 980 break;
981 case ETHTOOL_GTXCSUM:
13c99b24 982 rc = ethtool_get_value(dev, useraddr, ethcmd,
88d3aafd
JG		 983 (dev->ethtool_ops->get_tx_csum ?
984 dev->ethtool_ops->get_tx_csum :
985 ethtool_op_get_tx_csum));
1da177e4
LT		 986 break;
987 case ETHTOOL_STXCSUM:
988 rc = ethtool_set_tx_csum(dev, useraddr);
989 break;
990 case ETHTOOL_GSG:
13c99b24 991 rc = ethtool_get_value(dev, useraddr, ethcmd,
88d3aafd
JG		 992 (dev->ethtool_ops->get_sg ?
993 dev->ethtool_ops->get_sg :
994 ethtool_op_get_sg));
1da177e4
LT		 995 break;
996 case ETHTOOL_SSG:
997 rc = ethtool_set_sg(dev, useraddr);
998 break;
999 case ETHTOOL_GTSO:
13c99b24 1000 rc = ethtool_get_value(dev, useraddr, ethcmd,
88d3aafd
JG		 1001 (dev->ethtool_ops->get_tso ?
1002 dev->ethtool_ops->get_tso :
1003 ethtool_op_get_tso));
1da177e4
LT		 1004 break;
1005 case ETHTOOL_STSO:
1006 rc = ethtool_set_tso(dev, useraddr);
1007 break;
1008 case ETHTOOL_TEST:
1009 rc = ethtool_self_test(dev, useraddr);
1010 break;
1011 case ETHTOOL_GSTRINGS:
1012 rc = ethtool_get_strings(dev, useraddr);
1013 break;
1014 case ETHTOOL_PHYS_ID:
1015 rc = ethtool_phys_id(dev, useraddr);
1016 break;
1017 case ETHTOOL_GSTATS:
1018 rc = ethtool_get_stats(dev, useraddr);
1019 break;
a6f9a705
JW		 1020 case ETHTOOL_GPERMADDR:
1021 rc = ethtool_get_perm_addr(dev, useraddr);
1022 break;
e89e9cf5 1023 case ETHTOOL_GUFO:
13c99b24 1024 rc = ethtool_get_value(dev, useraddr, ethcmd,
88d3aafd
JG		 1025 (dev->ethtool_ops->get_ufo ?
1026 dev->ethtool_ops->get_ufo :
1027 ethtool_op_get_ufo));
e89e9cf5
AR		 1028 break;
1029 case ETHTOOL_SUFO:
1030 rc = ethtool_set_ufo(dev, useraddr);
1031 break;
37c3185a
HX		 1032 case ETHTOOL_GGSO:
1033 rc = ethtool_get_gso(dev, useraddr);
1034 break;
1035 case ETHTOOL_SGSO:
1036 rc = ethtool_set_gso(dev, useraddr);
1037 break;
3ae7c0b2 1038 case ETHTOOL_GFLAGS:
13c99b24
JG		 1039 rc = ethtool_get_value(dev, useraddr, ethcmd,
1040 dev->ethtool_ops->get_flags);
3ae7c0b2
JG		 1041 break;
1042 case ETHTOOL_SFLAGS:
13c99b24
JG		 1043 rc = ethtool_set_value(dev, useraddr,
1044 dev->ethtool_ops->set_flags);
3ae7c0b2 1045 break;
339bf024 1046 case ETHTOOL_GPFLAGS:
13c99b24
JG		 1047 rc = ethtool_get_value(dev, useraddr, ethcmd,
1048 dev->ethtool_ops->get_priv_flags);
339bf024
JG		 1049 break;
1050 case ETHTOOL_SPFLAGS:
13c99b24
JG		 1051 rc = ethtool_set_value(dev, useraddr,
1052 dev->ethtool_ops->set_priv_flags);
339bf024 1053 break;
0853ad66
SB		 1054 case ETHTOOL_GRXFH:
1055 rc = ethtool_get_rxhash(dev, useraddr);
1056 break;
1057 case ETHTOOL_SRXFH:
1058 rc = ethtool_set_rxhash(dev, useraddr);
1059 break;
b240a0e5
HX		 1060 case ETHTOOL_GGRO:
1061 rc = ethtool_get_gro(dev, useraddr);
1062 break;
1063 case ETHTOOL_SGRO:
1064 rc = ethtool_set_gro(dev, useraddr);
1065 break;
1da177e4 1066 default:
61a44b9c 1067 rc = -EOPNOTSUPP;
1da177e4 1068 }
4ec93edb 1069
e71a4783 1070 if (dev->ethtool_ops->complete)
1da177e4 1071 dev->ethtool_ops->complete(dev);
d8a33ac4
SH		 1072
1073 if (old_features != dev->features)
1074 netdev_features_change(dev);
1075
1da177e4 1076 return rc;
1da177e4
LT		 1077}
1078
1da177e4
LT		 1079EXPORT_SYMBOL(ethtool_op_get_link);
1080EXPORT_SYMBOL(ethtool_op_get_sg);
1081EXPORT_SYMBOL(ethtool_op_get_tso);
1082EXPORT_SYMBOL(ethtool_op_get_tx_csum);
1083EXPORT_SYMBOL(ethtool_op_set_sg);
1084EXPORT_SYMBOL(ethtool_op_set_tso);
1085EXPORT_SYMBOL(ethtool_op_set_tx_csum);
69f6a0fa 1086EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
6460d948 1087EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
e89e9cf5
AR		 1088EXPORT_SYMBOL(ethtool_op_set_ufo);
1089EXPORT_SYMBOL(ethtool_op_get_ufo);
3ae7c0b2
JG		 1090EXPORT_SYMBOL(ethtool_op_set_flags);
1091EXPORT_SYMBOL(ethtool_op_get_flags);
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