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Page allocator: clean up pcp draining functions
[linux-2.6/kmemtrace.git] / net / core / ethtool.c
blob1163eb2256d0560b1fb3b4a71db5df5d4a40a072
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 u8 *data;
288 int ret;
289
290 if (!ops->get_eeprom || !ops->get_eeprom_len)
291 return -EOPNOTSUPP;
292
293 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
294 return -EFAULT;
295
296 /* Check for wrap and zero */
297 if (eeprom.offset + eeprom.len <= eeprom.offset)
298 return -EINVAL;
299
300 /* Check for exceeding total eeprom len */
301 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
302 return -EINVAL;
303
304 data = kmalloc(eeprom.len, GFP_USER);
305 if (!data)
306 return -ENOMEM;
307
308 ret = -EFAULT;
309 if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
310 goto out;
311
312 ret = ops->get_eeprom(dev, &eeprom, data);
313 if (ret)
314 goto out;
315
316 ret = -EFAULT;
317 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
318 goto out;
319 if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
320 goto out;
321 ret = 0;
322
323 out:
324 kfree(data);
325 return ret;
326 }
327
328 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
329 {
330 struct ethtool_eeprom eeprom;
331 const struct ethtool_ops *ops = dev->ethtool_ops;
332 u8 *data;
333 int ret;
334
335 if (!ops->set_eeprom || !ops->get_eeprom_len)
336 return -EOPNOTSUPP;
337
338 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
339 return -EFAULT;
340
341 /* Check for wrap and zero */
342 if (eeprom.offset + eeprom.len <= eeprom.offset)
343 return -EINVAL;
344
345 /* Check for exceeding total eeprom len */
346 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
347 return -EINVAL;
348
349 data = kmalloc(eeprom.len, GFP_USER);
350 if (!data)
351 return -ENOMEM;
352
353 ret = -EFAULT;
354 if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
355 goto out;
356
357 ret = ops->set_eeprom(dev, &eeprom, data);
358 if (ret)
359 goto out;
360
361 if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
362 ret = -EFAULT;
363
364 out:
365 kfree(data);
366 return ret;
367 }
368
369 static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
370 {
371 struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
372
373 if (!dev->ethtool_ops->get_coalesce)
374 return -EOPNOTSUPP;
375
376 dev->ethtool_ops->get_coalesce(dev, &coalesce);
377
378 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
379 return -EFAULT;
380 return 0;
381 }
382
383 static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
384 {
385 struct ethtool_coalesce coalesce;
386
387 if (!dev->ethtool_ops->set_coalesce)
388 return -EOPNOTSUPP;
389
390 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
391 return -EFAULT;
392
393 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
394 }
395
396 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
397 {
398 struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
399
400 if (!dev->ethtool_ops->get_ringparam)
401 return -EOPNOTSUPP;
402
403 dev->ethtool_ops->get_ringparam(dev, &ringparam);
404
405 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
406 return -EFAULT;
407 return 0;
408 }
409
410 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
411 {
412 struct ethtool_ringparam ringparam;
413
414 if (!dev->ethtool_ops->set_ringparam)
415 return -EOPNOTSUPP;
416
417 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
418 return -EFAULT;
419
420 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
421 }
422
423 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
424 {
425 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
426
427 if (!dev->ethtool_ops->get_pauseparam)
428 return -EOPNOTSUPP;
429
430 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
431
432 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
433 return -EFAULT;
434 return 0;
435 }
436
437 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
438 {
439 struct ethtool_pauseparam pauseparam;
440
441 if (!dev->ethtool_ops->set_pauseparam)
442 return -EOPNOTSUPP;
443
444 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
445 return -EFAULT;
446
447 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
448 }
449
450 static int __ethtool_set_sg(struct net_device *dev, u32 data)
451 {
452 int err;
453
454 if (!data && dev->ethtool_ops->set_tso) {
455 err = dev->ethtool_ops->set_tso(dev, 0);
456 if (err)
457 return err;
458 }
459
460 if (!data && dev->ethtool_ops->set_ufo) {
461 err = dev->ethtool_ops->set_ufo(dev, 0);
462 if (err)
463 return err;
464 }
465 return dev->ethtool_ops->set_sg(dev, data);
466 }
467
468 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
469 {
470 struct ethtool_value edata;
471 int err;
472
473 if (!dev->ethtool_ops->set_tx_csum)
474 return -EOPNOTSUPP;
475
476 if (copy_from_user(&edata, useraddr, sizeof(edata)))
477 return -EFAULT;
478
479 if (!edata.data && dev->ethtool_ops->set_sg) {
480 err = __ethtool_set_sg(dev, 0);
481 if (err)
482 return err;
483 }
484
485 return dev->ethtool_ops->set_tx_csum(dev, edata.data);
486 }
487
488 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
489 {
490 struct ethtool_value edata;
491
492 if (!dev->ethtool_ops->set_sg)
493 return -EOPNOTSUPP;
494
495 if (copy_from_user(&edata, useraddr, sizeof(edata)))
496 return -EFAULT;
497
498 if (edata.data &&
499 !(dev->features & NETIF_F_ALL_CSUM))
500 return -EINVAL;
501
502 return __ethtool_set_sg(dev, edata.data);
503 }
504
505 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
506 {
507 struct ethtool_value edata;
508
509 if (!dev->ethtool_ops->set_tso)
510 return -EOPNOTSUPP;
511
512 if (copy_from_user(&edata, useraddr, sizeof(edata)))
513 return -EFAULT;
514
515 if (edata.data && !(dev->features & NETIF_F_SG))
516 return -EINVAL;
517
518 return dev->ethtool_ops->set_tso(dev, edata.data);
519 }
520
521 static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
522 {
523 struct ethtool_value edata;
524
525 if (!dev->ethtool_ops->set_ufo)
526 return -EOPNOTSUPP;
527 if (copy_from_user(&edata, useraddr, sizeof(edata)))
528 return -EFAULT;
529 if (edata.data && !(dev->features & NETIF_F_SG))
530 return -EINVAL;
531 if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
532 return -EINVAL;
533 return dev->ethtool_ops->set_ufo(dev, edata.data);
534 }
535
536 static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
537 {
538 struct ethtool_value edata = { ETHTOOL_GGSO };
539
540 edata.data = dev->features & NETIF_F_GSO;
541 if (copy_to_user(useraddr, &edata, sizeof(edata)))
542 return -EFAULT;
543 return 0;
544 }
545
546 static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
547 {
548 struct ethtool_value edata;
549
550 if (copy_from_user(&edata, useraddr, sizeof(edata)))
551 return -EFAULT;
552 if (edata.data)
553 dev->features |= NETIF_F_GSO;
554 else
555 dev->features &= ~NETIF_F_GSO;
556 return 0;
557 }
558
559 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
560 {
561 struct ethtool_test test;
562 const struct ethtool_ops *ops = dev->ethtool_ops;
563 u64 *data;
564 int ret, test_len;
565
566 if (!ops->self_test)
567 return -EOPNOTSUPP;
568 if (!ops->get_sset_count && !ops->self_test_count)
569 return -EOPNOTSUPP;
570
571 if (ops->get_sset_count)
572 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
573 else
574 /* code path for obsolete hook */
575 test_len = ops->self_test_count(dev);
576 if (test_len < 0)
577 return test_len;
578 WARN_ON(test_len == 0);
579
580 if (copy_from_user(&test, useraddr, sizeof(test)))
581 return -EFAULT;
582
583 test.len = test_len;
584 data = kmalloc(test_len * sizeof(u64), GFP_USER);
585 if (!data)
586 return -ENOMEM;
587
588 ops->self_test(dev, &test, data);
589
590 ret = -EFAULT;
591 if (copy_to_user(useraddr, &test, sizeof(test)))
592 goto out;
593 useraddr += sizeof(test);
594 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
595 goto out;
596 ret = 0;
597
598 out:
599 kfree(data);
600 return ret;
601 }
602
603 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
604 {
605 struct ethtool_gstrings gstrings;
606 const struct ethtool_ops *ops = dev->ethtool_ops;
607 u8 *data;
608 int ret;
609
610 if (!ops->get_strings)
611 return -EOPNOTSUPP;
612
613 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
614 return -EFAULT;
615
616 if (ops->get_sset_count) {
617 ret = ops->get_sset_count(dev, gstrings.string_set);
618 if (ret < 0)
619 return ret;
620
621 gstrings.len = ret;
622 } else {
623 /* code path for obsolete hooks */
624
625 switch (gstrings.string_set) {
626 case ETH_SS_TEST:
627 if (!ops->self_test_count)
628 return -EOPNOTSUPP;
629 gstrings.len = ops->self_test_count(dev);
630 break;
631 case ETH_SS_STATS:
632 if (!ops->get_stats_count)
633 return -EOPNOTSUPP;
634 gstrings.len = ops->get_stats_count(dev);
635 break;
636 default:
637 return -EINVAL;
638 }
639 }
640
641 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
642 if (!data)
643 return -ENOMEM;
644
645 ops->get_strings(dev, gstrings.string_set, data);
646
647 ret = -EFAULT;
648 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
649 goto out;
650 useraddr += sizeof(gstrings);
651 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
652 goto out;
653 ret = 0;
654
655 out:
656 kfree(data);
657 return ret;
658 }
659
660 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
661 {
662 struct ethtool_value id;
663
664 if (!dev->ethtool_ops->phys_id)
665 return -EOPNOTSUPP;
666
667 if (copy_from_user(&id, useraddr, sizeof(id)))
668 return -EFAULT;
669
670 return dev->ethtool_ops->phys_id(dev, id.data);
671 }
672
673 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
674 {
675 struct ethtool_stats stats;
676 const struct ethtool_ops *ops = dev->ethtool_ops;
677 u64 *data;
678 int ret, n_stats;
679
680 if (!ops->get_ethtool_stats)
681 return -EOPNOTSUPP;
682 if (!ops->get_sset_count && !ops->get_stats_count)
683 return -EOPNOTSUPP;
684
685 if (ops->get_sset_count)
686 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
687 else
688 /* code path for obsolete hook */
689 n_stats = ops->get_stats_count(dev);
690 if (n_stats < 0)
691 return n_stats;
692 WARN_ON(n_stats == 0);
693
694 if (copy_from_user(&stats, useraddr, sizeof(stats)))
695 return -EFAULT;
696
697 stats.n_stats = n_stats;
698 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
699 if (!data)
700 return -ENOMEM;
701
702 ops->get_ethtool_stats(dev, &stats, data);
703
704 ret = -EFAULT;
705 if (copy_to_user(useraddr, &stats, sizeof(stats)))
706 goto out;
707 useraddr += sizeof(stats);
708 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
709 goto out;
710 ret = 0;
711
712 out:
713 kfree(data);
714 return ret;
715 }
716
717 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
718 {
719 struct ethtool_perm_addr epaddr;
720
721 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
722 return -EFAULT;
723
724 if (epaddr.size < dev->addr_len)
725 return -ETOOSMALL;
726 epaddr.size = dev->addr_len;
727
728 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
729 return -EFAULT;
730 useraddr += sizeof(epaddr);
731 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
732 return -EFAULT;
733 return 0;
734 }
735
736 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
737 u32 cmd, u32 (*actor)(struct net_device *))
738 {
739 struct ethtool_value edata = { cmd };
740
741 if (!actor)
742 return -EOPNOTSUPP;
743
744 edata.data = actor(dev);
745
746 if (copy_to_user(useraddr, &edata, sizeof(edata)))
747 return -EFAULT;
748 return 0;
749 }
750
751 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
752 void (*actor)(struct net_device *, u32))
753 {
754 struct ethtool_value edata;
755
756 if (!actor)
757 return -EOPNOTSUPP;
758
759 if (copy_from_user(&edata, useraddr, sizeof(edata)))
760 return -EFAULT;
761
762 actor(dev, edata.data);
763 return 0;
764 }
765
766 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
767 int (*actor)(struct net_device *, u32))
768 {
769 struct ethtool_value edata;
770
771 if (!actor)
772 return -EOPNOTSUPP;
773
774 if (copy_from_user(&edata, useraddr, sizeof(edata)))
775 return -EFAULT;
776
777 return actor(dev, edata.data);
778 }
779
780 /* The main entry point in this file. Called from net/core/dev.c */
781
782 int dev_ethtool(struct net *net, struct ifreq *ifr)
783 {
784 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
785 void __user *useraddr = ifr->ifr_data;
786 u32 ethcmd;
787 int rc;
788 unsigned long old_features;
789
790 if (!dev || !netif_device_present(dev))
791 return -ENODEV;
792
793 if (!dev->ethtool_ops)
794 return -EOPNOTSUPP;
795
796 if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
797 return -EFAULT;
798
799 /* Allow some commands to be done by anyone */
800 switch(ethcmd) {
801 case ETHTOOL_GDRVINFO:
802 case ETHTOOL_GMSGLVL:
803 case ETHTOOL_GCOALESCE:
804 case ETHTOOL_GRINGPARAM:
805 case ETHTOOL_GPAUSEPARAM:
806 case ETHTOOL_GRXCSUM:
807 case ETHTOOL_GTXCSUM:
808 case ETHTOOL_GSG:
809 case ETHTOOL_GSTRINGS:
810 case ETHTOOL_GTSO:
811 case ETHTOOL_GPERMADDR:
812 case ETHTOOL_GUFO:
813 case ETHTOOL_GGSO:
814 case ETHTOOL_GFLAGS:
815 case ETHTOOL_GPFLAGS:
816 break;
817 default:
818 if (!capable(CAP_NET_ADMIN))
819 return -EPERM;
820 }
821
822 if (dev->ethtool_ops->begin)
823 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
824 return rc;
825
826 old_features = dev->features;
827
828 switch (ethcmd) {
829 case ETHTOOL_GSET:
830 rc = ethtool_get_settings(dev, useraddr);
831 break;
832 case ETHTOOL_SSET:
833 rc = ethtool_set_settings(dev, useraddr);
834 break;
835 case ETHTOOL_GDRVINFO:
836 rc = ethtool_get_drvinfo(dev, useraddr);
837 break;
838 case ETHTOOL_GREGS:
839 rc = ethtool_get_regs(dev, useraddr);
840 break;
841 case ETHTOOL_GWOL:
842 rc = ethtool_get_wol(dev, useraddr);
843 break;
844 case ETHTOOL_SWOL:
845 rc = ethtool_set_wol(dev, useraddr);
846 break;
847 case ETHTOOL_GMSGLVL:
848 rc = ethtool_get_value(dev, useraddr, ethcmd,
849 dev->ethtool_ops->get_msglevel);
850 break;
851 case ETHTOOL_SMSGLVL:
852 rc = ethtool_set_value_void(dev, useraddr,
853 dev->ethtool_ops->set_msglevel);
854 break;
855 case ETHTOOL_NWAY_RST:
856 rc = ethtool_nway_reset(dev);
857 break;
858 case ETHTOOL_GLINK:
859 rc = ethtool_get_value(dev, useraddr, ethcmd,
860 dev->ethtool_ops->get_link);
861 break;
862 case ETHTOOL_GEEPROM:
863 rc = ethtool_get_eeprom(dev, useraddr);
864 break;
865 case ETHTOOL_SEEPROM:
866 rc = ethtool_set_eeprom(dev, useraddr);
867 break;
868 case ETHTOOL_GCOALESCE:
869 rc = ethtool_get_coalesce(dev, useraddr);
870 break;
871 case ETHTOOL_SCOALESCE:
872 rc = ethtool_set_coalesce(dev, useraddr);
873 break;
874 case ETHTOOL_GRINGPARAM:
875 rc = ethtool_get_ringparam(dev, useraddr);
876 break;
877 case ETHTOOL_SRINGPARAM:
878 rc = ethtool_set_ringparam(dev, useraddr);
879 break;
880 case ETHTOOL_GPAUSEPARAM:
881 rc = ethtool_get_pauseparam(dev, useraddr);
882 break;
883 case ETHTOOL_SPAUSEPARAM:
884 rc = ethtool_set_pauseparam(dev, useraddr);
885 break;
886 case ETHTOOL_GRXCSUM:
887 rc = ethtool_get_value(dev, useraddr, ethcmd,
888 dev->ethtool_ops->get_rx_csum);
889 break;
890 case ETHTOOL_SRXCSUM:
891 rc = ethtool_set_value(dev, useraddr,
892 dev->ethtool_ops->set_rx_csum);
893 break;
894 case ETHTOOL_GTXCSUM:
895 rc = ethtool_get_value(dev, useraddr, ethcmd,
896 (dev->ethtool_ops->get_tx_csum ?
897 dev->ethtool_ops->get_tx_csum :
898 ethtool_op_get_tx_csum));
899 break;
900 case ETHTOOL_STXCSUM:
901 rc = ethtool_set_tx_csum(dev, useraddr);
902 break;
903 case ETHTOOL_GSG:
904 rc = ethtool_get_value(dev, useraddr, ethcmd,
905 (dev->ethtool_ops->get_sg ?
906 dev->ethtool_ops->get_sg :
907 ethtool_op_get_sg));
908 break;
909 case ETHTOOL_SSG:
910 rc = ethtool_set_sg(dev, useraddr);
911 break;
912 case ETHTOOL_GTSO:
913 rc = ethtool_get_value(dev, useraddr, ethcmd,
914 (dev->ethtool_ops->get_tso ?
915 dev->ethtool_ops->get_tso :
916 ethtool_op_get_tso));
917 break;
918 case ETHTOOL_STSO:
919 rc = ethtool_set_tso(dev, useraddr);
920 break;
921 case ETHTOOL_TEST:
922 rc = ethtool_self_test(dev, useraddr);
923 break;
924 case ETHTOOL_GSTRINGS:
925 rc = ethtool_get_strings(dev, useraddr);
926 break;
927 case ETHTOOL_PHYS_ID:
928 rc = ethtool_phys_id(dev, useraddr);
929 break;
930 case ETHTOOL_GSTATS:
931 rc = ethtool_get_stats(dev, useraddr);
932 break;
933 case ETHTOOL_GPERMADDR:
934 rc = ethtool_get_perm_addr(dev, useraddr);
935 break;
936 case ETHTOOL_GUFO:
937 rc = ethtool_get_value(dev, useraddr, ethcmd,
938 (dev->ethtool_ops->get_ufo ?
939 dev->ethtool_ops->get_ufo :
940 ethtool_op_get_ufo));
941 break;
942 case ETHTOOL_SUFO:
943 rc = ethtool_set_ufo(dev, useraddr);
944 break;
945 case ETHTOOL_GGSO:
946 rc = ethtool_get_gso(dev, useraddr);
947 break;
948 case ETHTOOL_SGSO:
949 rc = ethtool_set_gso(dev, useraddr);
950 break;
951 case ETHTOOL_GFLAGS:
952 rc = ethtool_get_value(dev, useraddr, ethcmd,
953 dev->ethtool_ops->get_flags);
954 break;
955 case ETHTOOL_SFLAGS:
956 rc = ethtool_set_value(dev, useraddr,
957 dev->ethtool_ops->set_flags);
958 break;
959 case ETHTOOL_GPFLAGS:
960 rc = ethtool_get_value(dev, useraddr, ethcmd,
961 dev->ethtool_ops->get_priv_flags);
962 break;
963 case ETHTOOL_SPFLAGS:
964 rc = ethtool_set_value(dev, useraddr,
965 dev->ethtool_ops->set_priv_flags);
966 break;
967 default:
968 rc = -EOPNOTSUPP;
969 }
970
971 if (dev->ethtool_ops->complete)
972 dev->ethtool_ops->complete(dev);
973
974 if (old_features != dev->features)
975 netdev_features_change(dev);
976
977 return rc;
978 }
979
980 EXPORT_SYMBOL(ethtool_op_get_link);
981 EXPORT_SYMBOL(ethtool_op_get_sg);
982 EXPORT_SYMBOL(ethtool_op_get_tso);
983 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
984 EXPORT_SYMBOL(ethtool_op_set_sg);
985 EXPORT_SYMBOL(ethtool_op_set_tso);
986 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
987 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
988 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
989 EXPORT_SYMBOL(ethtool_op_set_ufo);
990 EXPORT_SYMBOL(ethtool_op_get_ufo);
991 EXPORT_SYMBOL(ethtool_op_set_flags);
992 EXPORT_SYMBOL(ethtool_op_get_flags);
kmemtrace - Kernel memory tracer