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mempolicy: clean-up mpol-to-str() mempolicy formatting
[linux-2.6/kmemtrace.git] / net / core / ethtool.c
blob0133b5ebd545287be9a2ee19d8fbf75db8e9ca59
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 <asm/uaccess.h>
21
22 /*
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
28 u32 ethtool_op_get_link(struct net_device *dev)
29 {
30 return netif_carrier_ok(dev) ? 1 : 0;
31 }
32
33 u32 ethtool_op_get_tx_csum(struct net_device *dev)
34 {
35 return (dev->features & NETIF_F_ALL_CSUM) != 0;
36 }
37
38 int 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
48 int 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 }
57
58 int 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
68 u32 ethtool_op_get_sg(struct net_device *dev)
69 {
70 return (dev->features & NETIF_F_SG) != 0;
71 }
72
73 int 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
83 u32 ethtool_op_get_tso(struct net_device *dev)
84 {
85 return (dev->features & NETIF_F_TSO) != 0;
86 }
87
88 int 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
98 u32 ethtool_op_get_ufo(struct net_device *dev)
99 {
100 return (dev->features & NETIF_F_UFO) != 0;
101 }
102
103 int 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
112 /* the following list of flags are the same as their associated
113 * NETIF_F_xxx values in include/linux/netdevice.h
114 */
115 static const u32 flags_dup_features =
116 ETH_FLAG_LRO;
117
118 u32 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
128 int 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
138 /* Handlers for each ethtool command */
139
140 static 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
157 static 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
170 static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
171 {
172 struct ethtool_drvinfo info;
173 const struct ethtool_ops *ops = dev->ethtool_ops;
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
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;
191 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
192 if (rc >= 0)
193 info.n_priv_flags = rc;
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 }
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
212 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
213 {
214 struct ethtool_regs regs;
215 const struct ethtool_ops *ops = dev->ethtool_ops;
216 void *regbuf;
217 int reglen, ret;
218
219 if (!ops->get_regs || !ops->get_regs_len)
220 return -EOPNOTSUPP;
221
222 if (copy_from_user(&regs, useraddr, sizeof(regs)))
223 return -EFAULT;
224
225 reglen = ops->get_regs_len(dev);
226 if (regs.len > reglen)
227 regs.len = reglen;
228
229 regbuf = kmalloc(reglen, GFP_USER);
230 if (!regbuf)
231 return -ENOMEM;
232
233 ops->get_regs(dev, &regs, regbuf);
234
235 ret = -EFAULT;
236 if (copy_to_user(useraddr, &regs, sizeof(regs)))
237 goto out;
238 useraddr += offsetof(struct ethtool_regs, data);
239 if (copy_to_user(useraddr, regbuf, regs.len))
240 goto out;
241 ret = 0;
242
243 out:
244 kfree(regbuf);
245 return ret;
246 }
247
248 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
249 {
250 struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
251
252 if (!dev->ethtool_ops->get_wol)
253 return -EOPNOTSUPP;
254
255 dev->ethtool_ops->get_wol(dev, &wol);
256
257 if (copy_to_user(useraddr, &wol, sizeof(wol)))
258 return -EFAULT;
259 return 0;
260 }
261
262 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
263 {
264 struct ethtool_wolinfo wol;
265
266 if (!dev->ethtool_ops->set_wol)
267 return -EOPNOTSUPP;
268
269 if (copy_from_user(&wol, useraddr, sizeof(wol)))
270 return -EFAULT;
271
272 return dev->ethtool_ops->set_wol(dev, &wol);
273 }
274
275 static int ethtool_nway_reset(struct net_device *dev)
276 {
277 if (!dev->ethtool_ops->nway_reset)
278 return -EOPNOTSUPP;
279
280 return dev->ethtool_ops->nway_reset(dev);
281 }
282
283 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
284 {
285 struct ethtool_eeprom eeprom;
286 const struct ethtool_ops *ops = dev->ethtool_ops;
287 void __user *userbuf = useraddr + sizeof(eeprom);
288 u32 bytes_remaining;
289 u8 *data;
290 int ret = 0;
291
292 if (!ops->get_eeprom || !ops->get_eeprom_len)
293 return -EOPNOTSUPP;
294
295 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
296 return -EFAULT;
297
298 /* Check for wrap and zero */
299 if (eeprom.offset + eeprom.len <= eeprom.offset)
300 return -EINVAL;
301
302 /* Check for exceeding total eeprom len */
303 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
304 return -EINVAL;
305
306 data = kmalloc(PAGE_SIZE, GFP_USER);
307 if (!data)
308 return -ENOMEM;
309
310 bytes_remaining = eeprom.len;
311 while (bytes_remaining > 0) {
312 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
313
314 ret = ops->get_eeprom(dev, &eeprom, data);
315 if (ret)
316 break;
317 if (copy_to_user(userbuf, data, eeprom.len)) {
318 ret = -EFAULT;
319 break;
320 }
321 userbuf += eeprom.len;
322 eeprom.offset += eeprom.len;
323 bytes_remaining -= eeprom.len;
324 }
325
326 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
327 eeprom.offset -= eeprom.len;
328 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
329 ret = -EFAULT;
330
331 kfree(data);
332 return ret;
333 }
334
335 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
336 {
337 struct ethtool_eeprom eeprom;
338 const struct ethtool_ops *ops = dev->ethtool_ops;
339 void __user *userbuf = useraddr + sizeof(eeprom);
340 u32 bytes_remaining;
341 u8 *data;
342 int ret = 0;
343
344 if (!ops->set_eeprom || !ops->get_eeprom_len)
345 return -EOPNOTSUPP;
346
347 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
348 return -EFAULT;
349
350 /* Check for wrap and zero */
351 if (eeprom.offset + eeprom.len <= eeprom.offset)
352 return -EINVAL;
353
354 /* Check for exceeding total eeprom len */
355 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
356 return -EINVAL;
357
358 data = kmalloc(PAGE_SIZE, GFP_USER);
359 if (!data)
360 return -ENOMEM;
361
362 bytes_remaining = eeprom.len;
363 while (bytes_remaining > 0) {
364 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
365
366 if (copy_from_user(data, userbuf, eeprom.len)) {
367 ret = -EFAULT;
368 break;
369 }
370 ret = ops->set_eeprom(dev, &eeprom, data);
371 if (ret)
372 break;
373 userbuf += eeprom.len;
374 eeprom.offset += eeprom.len;
375 bytes_remaining -= eeprom.len;
376 }
377
378 kfree(data);
379 return ret;
380 }
381
382 static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
383 {
384 struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
385
386 if (!dev->ethtool_ops->get_coalesce)
387 return -EOPNOTSUPP;
388
389 dev->ethtool_ops->get_coalesce(dev, &coalesce);
390
391 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
392 return -EFAULT;
393 return 0;
394 }
395
396 static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
397 {
398 struct ethtool_coalesce coalesce;
399
400 if (!dev->ethtool_ops->set_coalesce)
401 return -EOPNOTSUPP;
402
403 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
404 return -EFAULT;
405
406 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
407 }
408
409 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
410 {
411 struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
412
413 if (!dev->ethtool_ops->get_ringparam)
414 return -EOPNOTSUPP;
415
416 dev->ethtool_ops->get_ringparam(dev, &ringparam);
417
418 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
419 return -EFAULT;
420 return 0;
421 }
422
423 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
424 {
425 struct ethtool_ringparam ringparam;
426
427 if (!dev->ethtool_ops->set_ringparam)
428 return -EOPNOTSUPP;
429
430 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
431 return -EFAULT;
432
433 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
434 }
435
436 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
437 {
438 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
439
440 if (!dev->ethtool_ops->get_pauseparam)
441 return -EOPNOTSUPP;
442
443 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
444
445 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
446 return -EFAULT;
447 return 0;
448 }
449
450 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
451 {
452 struct ethtool_pauseparam pauseparam;
453
454 if (!dev->ethtool_ops->set_pauseparam)
455 return -EOPNOTSUPP;
456
457 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
458 return -EFAULT;
459
460 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
461 }
462
463 static int __ethtool_set_sg(struct net_device *dev, u32 data)
464 {
465 int err;
466
467 if (!data && dev->ethtool_ops->set_tso) {
468 err = dev->ethtool_ops->set_tso(dev, 0);
469 if (err)
470 return err;
471 }
472
473 if (!data && dev->ethtool_ops->set_ufo) {
474 err = dev->ethtool_ops->set_ufo(dev, 0);
475 if (err)
476 return err;
477 }
478 return dev->ethtool_ops->set_sg(dev, data);
479 }
480
481 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
482 {
483 struct ethtool_value edata;
484 int err;
485
486 if (!dev->ethtool_ops->set_tx_csum)
487 return -EOPNOTSUPP;
488
489 if (copy_from_user(&edata, useraddr, sizeof(edata)))
490 return -EFAULT;
491
492 if (!edata.data && dev->ethtool_ops->set_sg) {
493 err = __ethtool_set_sg(dev, 0);
494 if (err)
495 return err;
496 }
497
498 return dev->ethtool_ops->set_tx_csum(dev, edata.data);
499 }
500
501 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
502 {
503 struct ethtool_value edata;
504
505 if (!dev->ethtool_ops->set_sg)
506 return -EOPNOTSUPP;
507
508 if (copy_from_user(&edata, useraddr, sizeof(edata)))
509 return -EFAULT;
510
511 if (edata.data &&
512 !(dev->features & NETIF_F_ALL_CSUM))
513 return -EINVAL;
514
515 return __ethtool_set_sg(dev, edata.data);
516 }
517
518 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
519 {
520 struct ethtool_value edata;
521
522 if (!dev->ethtool_ops->set_tso)
523 return -EOPNOTSUPP;
524
525 if (copy_from_user(&edata, useraddr, sizeof(edata)))
526 return -EFAULT;
527
528 if (edata.data && !(dev->features & NETIF_F_SG))
529 return -EINVAL;
530
531 return dev->ethtool_ops->set_tso(dev, edata.data);
532 }
533
534 static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
535 {
536 struct ethtool_value edata;
537
538 if (!dev->ethtool_ops->set_ufo)
539 return -EOPNOTSUPP;
540 if (copy_from_user(&edata, useraddr, sizeof(edata)))
541 return -EFAULT;
542 if (edata.data && !(dev->features & NETIF_F_SG))
543 return -EINVAL;
544 if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
545 return -EINVAL;
546 return dev->ethtool_ops->set_ufo(dev, edata.data);
547 }
548
549 static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
550 {
551 struct ethtool_value edata = { ETHTOOL_GGSO };
552
553 edata.data = dev->features & NETIF_F_GSO;
554 if (copy_to_user(useraddr, &edata, sizeof(edata)))
555 return -EFAULT;
556 return 0;
557 }
558
559 static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
560 {
561 struct ethtool_value edata;
562
563 if (copy_from_user(&edata, useraddr, sizeof(edata)))
564 return -EFAULT;
565 if (edata.data)
566 dev->features |= NETIF_F_GSO;
567 else
568 dev->features &= ~NETIF_F_GSO;
569 return 0;
570 }
571
572 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
573 {
574 struct ethtool_test test;
575 const struct ethtool_ops *ops = dev->ethtool_ops;
576 u64 *data;
577 int ret, test_len;
578
579 if (!ops->self_test)
580 return -EOPNOTSUPP;
581 if (!ops->get_sset_count && !ops->self_test_count)
582 return -EOPNOTSUPP;
583
584 if (ops->get_sset_count)
585 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
586 else
587 /* code path for obsolete hook */
588 test_len = ops->self_test_count(dev);
589 if (test_len < 0)
590 return test_len;
591 WARN_ON(test_len == 0);
592
593 if (copy_from_user(&test, useraddr, sizeof(test)))
594 return -EFAULT;
595
596 test.len = test_len;
597 data = kmalloc(test_len * sizeof(u64), GFP_USER);
598 if (!data)
599 return -ENOMEM;
600
601 ops->self_test(dev, &test, data);
602
603 ret = -EFAULT;
604 if (copy_to_user(useraddr, &test, sizeof(test)))
605 goto out;
606 useraddr += sizeof(test);
607 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
608 goto out;
609 ret = 0;
610
611 out:
612 kfree(data);
613 return ret;
614 }
615
616 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
617 {
618 struct ethtool_gstrings gstrings;
619 const struct ethtool_ops *ops = dev->ethtool_ops;
620 u8 *data;
621 int ret;
622
623 if (!ops->get_strings)
624 return -EOPNOTSUPP;
625
626 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
627 return -EFAULT;
628
629 if (ops->get_sset_count) {
630 ret = ops->get_sset_count(dev, gstrings.string_set);
631 if (ret < 0)
632 return ret;
633
634 gstrings.len = ret;
635 } else {
636 /* code path for obsolete hooks */
637
638 switch (gstrings.string_set) {
639 case ETH_SS_TEST:
640 if (!ops->self_test_count)
641 return -EOPNOTSUPP;
642 gstrings.len = ops->self_test_count(dev);
643 break;
644 case ETH_SS_STATS:
645 if (!ops->get_stats_count)
646 return -EOPNOTSUPP;
647 gstrings.len = ops->get_stats_count(dev);
648 break;
649 default:
650 return -EINVAL;
651 }
652 }
653
654 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
655 if (!data)
656 return -ENOMEM;
657
658 ops->get_strings(dev, gstrings.string_set, data);
659
660 ret = -EFAULT;
661 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
662 goto out;
663 useraddr += sizeof(gstrings);
664 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
665 goto out;
666 ret = 0;
667
668 out:
669 kfree(data);
670 return ret;
671 }
672
673 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
674 {
675 struct ethtool_value id;
676
677 if (!dev->ethtool_ops->phys_id)
678 return -EOPNOTSUPP;
679
680 if (copy_from_user(&id, useraddr, sizeof(id)))
681 return -EFAULT;
682
683 return dev->ethtool_ops->phys_id(dev, id.data);
684 }
685
686 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
687 {
688 struct ethtool_stats stats;
689 const struct ethtool_ops *ops = dev->ethtool_ops;
690 u64 *data;
691 int ret, n_stats;
692
693 if (!ops->get_ethtool_stats)
694 return -EOPNOTSUPP;
695 if (!ops->get_sset_count && !ops->get_stats_count)
696 return -EOPNOTSUPP;
697
698 if (ops->get_sset_count)
699 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
700 else
701 /* code path for obsolete hook */
702 n_stats = ops->get_stats_count(dev);
703 if (n_stats < 0)
704 return n_stats;
705 WARN_ON(n_stats == 0);
706
707 if (copy_from_user(&stats, useraddr, sizeof(stats)))
708 return -EFAULT;
709
710 stats.n_stats = n_stats;
711 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
712 if (!data)
713 return -ENOMEM;
714
715 ops->get_ethtool_stats(dev, &stats, data);
716
717 ret = -EFAULT;
718 if (copy_to_user(useraddr, &stats, sizeof(stats)))
719 goto out;
720 useraddr += sizeof(stats);
721 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
722 goto out;
723 ret = 0;
724
725 out:
726 kfree(data);
727 return ret;
728 }
729
730 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
731 {
732 struct ethtool_perm_addr epaddr;
733
734 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
735 return -EFAULT;
736
737 if (epaddr.size < dev->addr_len)
738 return -ETOOSMALL;
739 epaddr.size = dev->addr_len;
740
741 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
742 return -EFAULT;
743 useraddr += sizeof(epaddr);
744 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
745 return -EFAULT;
746 return 0;
747 }
748
749 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
750 u32 cmd, u32 (*actor)(struct net_device *))
751 {
752 struct ethtool_value edata = { cmd };
753
754 if (!actor)
755 return -EOPNOTSUPP;
756
757 edata.data = actor(dev);
758
759 if (copy_to_user(useraddr, &edata, sizeof(edata)))
760 return -EFAULT;
761 return 0;
762 }
763
764 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
765 void (*actor)(struct net_device *, u32))
766 {
767 struct ethtool_value edata;
768
769 if (!actor)
770 return -EOPNOTSUPP;
771
772 if (copy_from_user(&edata, useraddr, sizeof(edata)))
773 return -EFAULT;
774
775 actor(dev, edata.data);
776 return 0;
777 }
778
779 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
780 int (*actor)(struct net_device *, u32))
781 {
782 struct ethtool_value edata;
783
784 if (!actor)
785 return -EOPNOTSUPP;
786
787 if (copy_from_user(&edata, useraddr, sizeof(edata)))
788 return -EFAULT;
789
790 return actor(dev, edata.data);
791 }
792
793 /* The main entry point in this file. Called from net/core/dev.c */
794
795 int dev_ethtool(struct net *net, struct ifreq *ifr)
796 {
797 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
798 void __user *useraddr = ifr->ifr_data;
799 u32 ethcmd;
800 int rc;
801 unsigned long old_features;
802
803 if (!dev || !netif_device_present(dev))
804 return -ENODEV;
805
806 if (!dev->ethtool_ops)
807 return -EOPNOTSUPP;
808
809 if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
810 return -EFAULT;
811
812 /* Allow some commands to be done by anyone */
813 switch(ethcmd) {
814 case ETHTOOL_GDRVINFO:
815 case ETHTOOL_GMSGLVL:
816 case ETHTOOL_GCOALESCE:
817 case ETHTOOL_GRINGPARAM:
818 case ETHTOOL_GPAUSEPARAM:
819 case ETHTOOL_GRXCSUM:
820 case ETHTOOL_GTXCSUM:
821 case ETHTOOL_GSG:
822 case ETHTOOL_GSTRINGS:
823 case ETHTOOL_GTSO:
824 case ETHTOOL_GPERMADDR:
825 case ETHTOOL_GUFO:
826 case ETHTOOL_GGSO:
827 case ETHTOOL_GFLAGS:
828 case ETHTOOL_GPFLAGS:
829 break;
830 default:
831 if (!capable(CAP_NET_ADMIN))
832 return -EPERM;
833 }
834
835 if (dev->ethtool_ops->begin)
836 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
837 return rc;
838
839 old_features = dev->features;
840
841 switch (ethcmd) {
842 case ETHTOOL_GSET:
843 rc = ethtool_get_settings(dev, useraddr);
844 break;
845 case ETHTOOL_SSET:
846 rc = ethtool_set_settings(dev, useraddr);
847 break;
848 case ETHTOOL_GDRVINFO:
849 rc = ethtool_get_drvinfo(dev, useraddr);
850 break;
851 case ETHTOOL_GREGS:
852 rc = ethtool_get_regs(dev, useraddr);
853 break;
854 case ETHTOOL_GWOL:
855 rc = ethtool_get_wol(dev, useraddr);
856 break;
857 case ETHTOOL_SWOL:
858 rc = ethtool_set_wol(dev, useraddr);
859 break;
860 case ETHTOOL_GMSGLVL:
861 rc = ethtool_get_value(dev, useraddr, ethcmd,
862 dev->ethtool_ops->get_msglevel);
863 break;
864 case ETHTOOL_SMSGLVL:
865 rc = ethtool_set_value_void(dev, useraddr,
866 dev->ethtool_ops->set_msglevel);
867 break;
868 case ETHTOOL_NWAY_RST:
869 rc = ethtool_nway_reset(dev);
870 break;
871 case ETHTOOL_GLINK:
872 rc = ethtool_get_value(dev, useraddr, ethcmd,
873 dev->ethtool_ops->get_link);
874 break;
875 case ETHTOOL_GEEPROM:
876 rc = ethtool_get_eeprom(dev, useraddr);
877 break;
878 case ETHTOOL_SEEPROM:
879 rc = ethtool_set_eeprom(dev, useraddr);
880 break;
881 case ETHTOOL_GCOALESCE:
882 rc = ethtool_get_coalesce(dev, useraddr);
883 break;
884 case ETHTOOL_SCOALESCE:
885 rc = ethtool_set_coalesce(dev, useraddr);
886 break;
887 case ETHTOOL_GRINGPARAM:
888 rc = ethtool_get_ringparam(dev, useraddr);
889 break;
890 case ETHTOOL_SRINGPARAM:
891 rc = ethtool_set_ringparam(dev, useraddr);
892 break;
893 case ETHTOOL_GPAUSEPARAM:
894 rc = ethtool_get_pauseparam(dev, useraddr);
895 break;
896 case ETHTOOL_SPAUSEPARAM:
897 rc = ethtool_set_pauseparam(dev, useraddr);
898 break;
899 case ETHTOOL_GRXCSUM:
900 rc = ethtool_get_value(dev, useraddr, ethcmd,
901 dev->ethtool_ops->get_rx_csum);
902 break;
903 case ETHTOOL_SRXCSUM:
904 rc = ethtool_set_value(dev, useraddr,
905 dev->ethtool_ops->set_rx_csum);
906 break;
907 case ETHTOOL_GTXCSUM:
908 rc = ethtool_get_value(dev, useraddr, ethcmd,
909 (dev->ethtool_ops->get_tx_csum ?
910 dev->ethtool_ops->get_tx_csum :
911 ethtool_op_get_tx_csum));
912 break;
913 case ETHTOOL_STXCSUM:
914 rc = ethtool_set_tx_csum(dev, useraddr);
915 break;
916 case ETHTOOL_GSG:
917 rc = ethtool_get_value(dev, useraddr, ethcmd,
918 (dev->ethtool_ops->get_sg ?
919 dev->ethtool_ops->get_sg :
920 ethtool_op_get_sg));
921 break;
922 case ETHTOOL_SSG:
923 rc = ethtool_set_sg(dev, useraddr);
924 break;
925 case ETHTOOL_GTSO:
926 rc = ethtool_get_value(dev, useraddr, ethcmd,
927 (dev->ethtool_ops->get_tso ?
928 dev->ethtool_ops->get_tso :
929 ethtool_op_get_tso));
930 break;
931 case ETHTOOL_STSO:
932 rc = ethtool_set_tso(dev, useraddr);
933 break;
934 case ETHTOOL_TEST:
935 rc = ethtool_self_test(dev, useraddr);
936 break;
937 case ETHTOOL_GSTRINGS:
938 rc = ethtool_get_strings(dev, useraddr);
939 break;
940 case ETHTOOL_PHYS_ID:
941 rc = ethtool_phys_id(dev, useraddr);
942 break;
943 case ETHTOOL_GSTATS:
944 rc = ethtool_get_stats(dev, useraddr);
945 break;
946 case ETHTOOL_GPERMADDR:
947 rc = ethtool_get_perm_addr(dev, useraddr);
948 break;
949 case ETHTOOL_GUFO:
950 rc = ethtool_get_value(dev, useraddr, ethcmd,
951 (dev->ethtool_ops->get_ufo ?
952 dev->ethtool_ops->get_ufo :
953 ethtool_op_get_ufo));
954 break;
955 case ETHTOOL_SUFO:
956 rc = ethtool_set_ufo(dev, useraddr);
957 break;
958 case ETHTOOL_GGSO:
959 rc = ethtool_get_gso(dev, useraddr);
960 break;
961 case ETHTOOL_SGSO:
962 rc = ethtool_set_gso(dev, useraddr);
963 break;
964 case ETHTOOL_GFLAGS:
965 rc = ethtool_get_value(dev, useraddr, ethcmd,
966 dev->ethtool_ops->get_flags);
967 break;
968 case ETHTOOL_SFLAGS:
969 rc = ethtool_set_value(dev, useraddr,
970 dev->ethtool_ops->set_flags);
971 break;
972 case ETHTOOL_GPFLAGS:
973 rc = ethtool_get_value(dev, useraddr, ethcmd,
974 dev->ethtool_ops->get_priv_flags);
975 break;
976 case ETHTOOL_SPFLAGS:
977 rc = ethtool_set_value(dev, useraddr,
978 dev->ethtool_ops->set_priv_flags);
979 break;
980 default:
981 rc = -EOPNOTSUPP;
982 }
983
984 if (dev->ethtool_ops->complete)
985 dev->ethtool_ops->complete(dev);
986
987 if (old_features != dev->features)
988 netdev_features_change(dev);
989
990 return rc;
991 }
992
993 EXPORT_SYMBOL(ethtool_op_get_link);
994 EXPORT_SYMBOL(ethtool_op_get_sg);
995 EXPORT_SYMBOL(ethtool_op_get_tso);
996 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
997 EXPORT_SYMBOL(ethtool_op_set_sg);
998 EXPORT_SYMBOL(ethtool_op_set_tso);
999 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
1000 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
1001 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
1002 EXPORT_SYMBOL(ethtool_op_set_ufo);
1003 EXPORT_SYMBOL(ethtool_op_get_ufo);
1004 EXPORT_SYMBOL(ethtool_op_set_flags);
1005 EXPORT_SYMBOL(ethtool_op_get_flags);
kmemtrace - Kernel memory tracer