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htcleo: add Cotulla's fixes for non-android touchscreen!
[htc-linux.git] / net / core / ethtool.c
blob4c12ddb5f5ee43ab546278ba5527c2e10939824b
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_rx_csum(struct net_device *dev)
34 {
35 return (dev->features & NETIF_F_ALL_CSUM) != 0;
36 }
37 EXPORT_SYMBOL(ethtool_op_get_rx_csum);
38
39 u32 ethtool_op_get_tx_csum(struct net_device *dev)
40 {
41 return (dev->features & NETIF_F_ALL_CSUM) != 0;
42 }
43 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
44
45 int 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 }
54
55 int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
56 {
57 if (data)
58 dev->features |= NETIF_F_HW_CSUM;
59 else
60 dev->features &= ~NETIF_F_HW_CSUM;
61
62 return 0;
63 }
64
65 int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
66 {
67 if (data)
68 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
69 else
70 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
71
72 return 0;
73 }
74
75 u32 ethtool_op_get_sg(struct net_device *dev)
76 {
77 return (dev->features & NETIF_F_SG) != 0;
78 }
79
80 int ethtool_op_set_sg(struct net_device *dev, u32 data)
81 {
82 if (data)
83 dev->features |= NETIF_F_SG;
84 else
85 dev->features &= ~NETIF_F_SG;
86
87 return 0;
88 }
89
90 u32 ethtool_op_get_tso(struct net_device *dev)
91 {
92 return (dev->features & NETIF_F_TSO) != 0;
93 }
94
95 int ethtool_op_set_tso(struct net_device *dev, u32 data)
96 {
97 if (data)
98 dev->features |= NETIF_F_TSO;
99 else
100 dev->features &= ~NETIF_F_TSO;
101
102 return 0;
103 }
104
105 u32 ethtool_op_get_ufo(struct net_device *dev)
106 {
107 return (dev->features & NETIF_F_UFO) != 0;
108 }
109
110 int ethtool_op_set_ufo(struct net_device *dev, u32 data)
111 {
112 if (data)
113 dev->features |= NETIF_F_UFO;
114 else
115 dev->features &= ~NETIF_F_UFO;
116 return 0;
117 }
118
119 /* the following list of flags are the same as their associated
120 * NETIF_F_xxx values in include/linux/netdevice.h
121 */
122 static const u32 flags_dup_features =
123 ETH_FLAG_LRO;
124
125 u32 ethtool_op_get_flags(struct net_device *dev)
126 {
127 /* in the future, this function will probably contain additional
128 * handling for flags which are not so easily handled
129 * by a simple masking operation
130 */
131
132 return dev->features & flags_dup_features;
133 }
134
135 int ethtool_op_set_flags(struct net_device *dev, u32 data)
136 {
137 if (data & ETH_FLAG_LRO)
138 dev->features |= NETIF_F_LRO;
139 else
140 dev->features &= ~NETIF_F_LRO;
141
142 return 0;
143 }
144
145 /* Handlers for each ethtool command */
146
147 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
148 {
149 struct ethtool_cmd cmd = { ETHTOOL_GSET };
150 int err;
151
152 if (!dev->ethtool_ops->get_settings)
153 return -EOPNOTSUPP;
154
155 err = dev->ethtool_ops->get_settings(dev, &cmd);
156 if (err < 0)
157 return err;
158
159 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
160 return -EFAULT;
161 return 0;
162 }
163
164 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
165 {
166 struct ethtool_cmd cmd;
167
168 if (!dev->ethtool_ops->set_settings)
169 return -EOPNOTSUPP;
170
171 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
172 return -EFAULT;
173
174 return dev->ethtool_ops->set_settings(dev, &cmd);
175 }
176
177 static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
178 {
179 struct ethtool_drvinfo info;
180 const struct ethtool_ops *ops = dev->ethtool_ops;
181
182 if (!ops->get_drvinfo)
183 return -EOPNOTSUPP;
184
185 memset(&info, 0, sizeof(info));
186 info.cmd = ETHTOOL_GDRVINFO;
187 ops->get_drvinfo(dev, &info);
188
189 if (ops->get_sset_count) {
190 int rc;
191
192 rc = ops->get_sset_count(dev, ETH_SS_TEST);
193 if (rc >= 0)
194 info.testinfo_len = rc;
195 rc = ops->get_sset_count(dev, ETH_SS_STATS);
196 if (rc >= 0)
197 info.n_stats = rc;
198 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
199 if (rc >= 0)
200 info.n_priv_flags = rc;
201 } else {
202 /* code path for obsolete hooks */
203
204 if (ops->self_test_count)
205 info.testinfo_len = ops->self_test_count(dev);
206 if (ops->get_stats_count)
207 info.n_stats = ops->get_stats_count(dev);
208 }
209 if (ops->get_regs_len)
210 info.regdump_len = ops->get_regs_len(dev);
211 if (ops->get_eeprom_len)
212 info.eedump_len = ops->get_eeprom_len(dev);
213
214 if (copy_to_user(useraddr, &info, sizeof(info)))
215 return -EFAULT;
216 return 0;
217 }
218
219 static int ethtool_set_rxnfc(struct net_device *dev, void __user *useraddr)
220 {
221 struct ethtool_rxnfc cmd;
222
223 if (!dev->ethtool_ops->set_rxnfc)
224 return -EOPNOTSUPP;
225
226 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
227 return -EFAULT;
228
229 return dev->ethtool_ops->set_rxnfc(dev, &cmd);
230 }
231
232 static int ethtool_get_rxnfc(struct net_device *dev, void __user *useraddr)
233 {
234 struct ethtool_rxnfc info;
235 const struct ethtool_ops *ops = dev->ethtool_ops;
236 int ret;
237 void *rule_buf = NULL;
238
239 if (!ops->get_rxnfc)
240 return -EOPNOTSUPP;
241
242 if (copy_from_user(&info, useraddr, sizeof(info)))
243 return -EFAULT;
244
245 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
246 if (info.rule_cnt > 0) {
247 rule_buf = kmalloc(info.rule_cnt * sizeof(u32),
248 GFP_USER);
249 if (!rule_buf)
250 return -ENOMEM;
251 }
252 }
253
254 ret = ops->get_rxnfc(dev, &info, rule_buf);
255 if (ret < 0)
256 goto err_out;
257
258 ret = -EFAULT;
259 if (copy_to_user(useraddr, &info, sizeof(info)))
260 goto err_out;
261
262 if (rule_buf) {
263 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
264 if (copy_to_user(useraddr, rule_buf,
265 info.rule_cnt * sizeof(u32)))
266 goto err_out;
267 }
268 ret = 0;
269
270 err_out:
271 kfree(rule_buf);
272
273 return ret;
274 }
275
276 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
277 {
278 struct ethtool_regs regs;
279 const struct ethtool_ops *ops = dev->ethtool_ops;
280 void *regbuf;
281 int reglen, ret;
282
283 if (!ops->get_regs || !ops->get_regs_len)
284 return -EOPNOTSUPP;
285
286 if (copy_from_user(&regs, useraddr, sizeof(regs)))
287 return -EFAULT;
288
289 reglen = ops->get_regs_len(dev);
290 if (regs.len > reglen)
291 regs.len = reglen;
292
293 regbuf = kmalloc(reglen, GFP_USER);
294 if (!regbuf)
295 return -ENOMEM;
296
297 ops->get_regs(dev, &regs, regbuf);
298
299 ret = -EFAULT;
300 if (copy_to_user(useraddr, &regs, sizeof(regs)))
301 goto out;
302 useraddr += offsetof(struct ethtool_regs, data);
303 if (copy_to_user(useraddr, regbuf, regs.len))
304 goto out;
305 ret = 0;
306
307 out:
308 kfree(regbuf);
309 return ret;
310 }
311
312 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
313 {
314 struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
315
316 if (!dev->ethtool_ops->get_wol)
317 return -EOPNOTSUPP;
318
319 dev->ethtool_ops->get_wol(dev, &wol);
320
321 if (copy_to_user(useraddr, &wol, sizeof(wol)))
322 return -EFAULT;
323 return 0;
324 }
325
326 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
327 {
328 struct ethtool_wolinfo wol;
329
330 if (!dev->ethtool_ops->set_wol)
331 return -EOPNOTSUPP;
332
333 if (copy_from_user(&wol, useraddr, sizeof(wol)))
334 return -EFAULT;
335
336 return dev->ethtool_ops->set_wol(dev, &wol);
337 }
338
339 static int ethtool_nway_reset(struct net_device *dev)
340 {
341 if (!dev->ethtool_ops->nway_reset)
342 return -EOPNOTSUPP;
343
344 return dev->ethtool_ops->nway_reset(dev);
345 }
346
347 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
348 {
349 struct ethtool_eeprom eeprom;
350 const struct ethtool_ops *ops = dev->ethtool_ops;
351 void __user *userbuf = useraddr + sizeof(eeprom);
352 u32 bytes_remaining;
353 u8 *data;
354 int ret = 0;
355
356 if (!ops->get_eeprom || !ops->get_eeprom_len)
357 return -EOPNOTSUPP;
358
359 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
360 return -EFAULT;
361
362 /* Check for wrap and zero */
363 if (eeprom.offset + eeprom.len <= eeprom.offset)
364 return -EINVAL;
365
366 /* Check for exceeding total eeprom len */
367 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
368 return -EINVAL;
369
370 data = kmalloc(PAGE_SIZE, GFP_USER);
371 if (!data)
372 return -ENOMEM;
373
374 bytes_remaining = eeprom.len;
375 while (bytes_remaining > 0) {
376 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
377
378 ret = ops->get_eeprom(dev, &eeprom, data);
379 if (ret)
380 break;
381 if (copy_to_user(userbuf, data, eeprom.len)) {
382 ret = -EFAULT;
383 break;
384 }
385 userbuf += eeprom.len;
386 eeprom.offset += eeprom.len;
387 bytes_remaining -= eeprom.len;
388 }
389
390 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
391 eeprom.offset -= eeprom.len;
392 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
393 ret = -EFAULT;
394
395 kfree(data);
396 return ret;
397 }
398
399 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
400 {
401 struct ethtool_eeprom eeprom;
402 const struct ethtool_ops *ops = dev->ethtool_ops;
403 void __user *userbuf = useraddr + sizeof(eeprom);
404 u32 bytes_remaining;
405 u8 *data;
406 int ret = 0;
407
408 if (!ops->set_eeprom || !ops->get_eeprom_len)
409 return -EOPNOTSUPP;
410
411 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
412 return -EFAULT;
413
414 /* Check for wrap and zero */
415 if (eeprom.offset + eeprom.len <= eeprom.offset)
416 return -EINVAL;
417
418 /* Check for exceeding total eeprom len */
419 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
420 return -EINVAL;
421
422 data = kmalloc(PAGE_SIZE, GFP_USER);
423 if (!data)
424 return -ENOMEM;
425
426 bytes_remaining = eeprom.len;
427 while (bytes_remaining > 0) {
428 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
429
430 if (copy_from_user(data, userbuf, eeprom.len)) {
431 ret = -EFAULT;
432 break;
433 }
434 ret = ops->set_eeprom(dev, &eeprom, data);
435 if (ret)
436 break;
437 userbuf += eeprom.len;
438 eeprom.offset += eeprom.len;
439 bytes_remaining -= eeprom.len;
440 }
441
442 kfree(data);
443 return ret;
444 }
445
446 static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
447 {
448 struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
449
450 if (!dev->ethtool_ops->get_coalesce)
451 return -EOPNOTSUPP;
452
453 dev->ethtool_ops->get_coalesce(dev, &coalesce);
454
455 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
456 return -EFAULT;
457 return 0;
458 }
459
460 static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
461 {
462 struct ethtool_coalesce coalesce;
463
464 if (!dev->ethtool_ops->set_coalesce)
465 return -EOPNOTSUPP;
466
467 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
468 return -EFAULT;
469
470 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
471 }
472
473 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
474 {
475 struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
476
477 if (!dev->ethtool_ops->get_ringparam)
478 return -EOPNOTSUPP;
479
480 dev->ethtool_ops->get_ringparam(dev, &ringparam);
481
482 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
483 return -EFAULT;
484 return 0;
485 }
486
487 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
488 {
489 struct ethtool_ringparam ringparam;
490
491 if (!dev->ethtool_ops->set_ringparam)
492 return -EOPNOTSUPP;
493
494 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
495 return -EFAULT;
496
497 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
498 }
499
500 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
501 {
502 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
503
504 if (!dev->ethtool_ops->get_pauseparam)
505 return -EOPNOTSUPP;
506
507 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
508
509 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
510 return -EFAULT;
511 return 0;
512 }
513
514 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
515 {
516 struct ethtool_pauseparam pauseparam;
517
518 if (!dev->ethtool_ops->set_pauseparam)
519 return -EOPNOTSUPP;
520
521 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
522 return -EFAULT;
523
524 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
525 }
526
527 static int __ethtool_set_sg(struct net_device *dev, u32 data)
528 {
529 int err;
530
531 if (!data && dev->ethtool_ops->set_tso) {
532 err = dev->ethtool_ops->set_tso(dev, 0);
533 if (err)
534 return err;
535 }
536
537 if (!data && dev->ethtool_ops->set_ufo) {
538 err = dev->ethtool_ops->set_ufo(dev, 0);
539 if (err)
540 return err;
541 }
542 return dev->ethtool_ops->set_sg(dev, data);
543 }
544
545 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
546 {
547 struct ethtool_value edata;
548 int err;
549
550 if (!dev->ethtool_ops->set_tx_csum)
551 return -EOPNOTSUPP;
552
553 if (copy_from_user(&edata, useraddr, sizeof(edata)))
554 return -EFAULT;
555
556 if (!edata.data && dev->ethtool_ops->set_sg) {
557 err = __ethtool_set_sg(dev, 0);
558 if (err)
559 return err;
560 }
561
562 return dev->ethtool_ops->set_tx_csum(dev, edata.data);
563 }
564
565 static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
566 {
567 struct ethtool_value edata;
568
569 if (!dev->ethtool_ops->set_rx_csum)
570 return -EOPNOTSUPP;
571
572 if (copy_from_user(&edata, useraddr, sizeof(edata)))
573 return -EFAULT;
574
575 if (!edata.data && dev->ethtool_ops->set_sg)
576 dev->features &= ~NETIF_F_GRO;
577
578 return dev->ethtool_ops->set_rx_csum(dev, edata.data);
579 }
580
581 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
582 {
583 struct ethtool_value edata;
584
585 if (!dev->ethtool_ops->set_sg)
586 return -EOPNOTSUPP;
587
588 if (copy_from_user(&edata, useraddr, sizeof(edata)))
589 return -EFAULT;
590
591 if (edata.data &&
592 !(dev->features & NETIF_F_ALL_CSUM))
593 return -EINVAL;
594
595 return __ethtool_set_sg(dev, edata.data);
596 }
597
598 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
599 {
600 struct ethtool_value edata;
601
602 if (!dev->ethtool_ops->set_tso)
603 return -EOPNOTSUPP;
604
605 if (copy_from_user(&edata, useraddr, sizeof(edata)))
606 return -EFAULT;
607
608 if (edata.data && !(dev->features & NETIF_F_SG))
609 return -EINVAL;
610
611 return dev->ethtool_ops->set_tso(dev, edata.data);
612 }
613
614 static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
615 {
616 struct ethtool_value edata;
617
618 if (!dev->ethtool_ops->set_ufo)
619 return -EOPNOTSUPP;
620 if (copy_from_user(&edata, useraddr, sizeof(edata)))
621 return -EFAULT;
622 if (edata.data && !(dev->features & NETIF_F_SG))
623 return -EINVAL;
624 if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
625 return -EINVAL;
626 return dev->ethtool_ops->set_ufo(dev, edata.data);
627 }
628
629 static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
630 {
631 struct ethtool_value edata = { ETHTOOL_GGSO };
632
633 edata.data = dev->features & NETIF_F_GSO;
634 if (copy_to_user(useraddr, &edata, sizeof(edata)))
635 return -EFAULT;
636 return 0;
637 }
638
639 static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
640 {
641 struct ethtool_value edata;
642
643 if (copy_from_user(&edata, useraddr, sizeof(edata)))
644 return -EFAULT;
645 if (edata.data)
646 dev->features |= NETIF_F_GSO;
647 else
648 dev->features &= ~NETIF_F_GSO;
649 return 0;
650 }
651
652 static int ethtool_get_gro(struct net_device *dev, char __user *useraddr)
653 {
654 struct ethtool_value edata = { ETHTOOL_GGRO };
655
656 edata.data = dev->features & NETIF_F_GRO;
657 if (copy_to_user(useraddr, &edata, sizeof(edata)))
658 return -EFAULT;
659 return 0;
660 }
661
662 static int ethtool_set_gro(struct net_device *dev, char __user *useraddr)
663 {
664 struct ethtool_value edata;
665
666 if (copy_from_user(&edata, useraddr, sizeof(edata)))
667 return -EFAULT;
668
669 if (edata.data) {
670 if (!dev->ethtool_ops->get_rx_csum ||
671 !dev->ethtool_ops->get_rx_csum(dev))
672 return -EINVAL;
673 dev->features |= NETIF_F_GRO;
674 } else
675 dev->features &= ~NETIF_F_GRO;
676
677 return 0;
678 }
679
680 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
681 {
682 struct ethtool_test test;
683 const struct ethtool_ops *ops = dev->ethtool_ops;
684 u64 *data;
685 int ret, test_len;
686
687 if (!ops->self_test)
688 return -EOPNOTSUPP;
689 if (!ops->get_sset_count && !ops->self_test_count)
690 return -EOPNOTSUPP;
691
692 if (ops->get_sset_count)
693 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
694 else
695 /* code path for obsolete hook */
696 test_len = ops->self_test_count(dev);
697 if (test_len < 0)
698 return test_len;
699 WARN_ON(test_len == 0);
700
701 if (copy_from_user(&test, useraddr, sizeof(test)))
702 return -EFAULT;
703
704 test.len = test_len;
705 data = kmalloc(test_len * sizeof(u64), GFP_USER);
706 if (!data)
707 return -ENOMEM;
708
709 ops->self_test(dev, &test, data);
710
711 ret = -EFAULT;
712 if (copy_to_user(useraddr, &test, sizeof(test)))
713 goto out;
714 useraddr += sizeof(test);
715 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
716 goto out;
717 ret = 0;
718
719 out:
720 kfree(data);
721 return ret;
722 }
723
724 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
725 {
726 struct ethtool_gstrings gstrings;
727 const struct ethtool_ops *ops = dev->ethtool_ops;
728 u8 *data;
729 int ret;
730
731 if (!ops->get_strings)
732 return -EOPNOTSUPP;
733
734 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
735 return -EFAULT;
736
737 if (ops->get_sset_count) {
738 ret = ops->get_sset_count(dev, gstrings.string_set);
739 if (ret < 0)
740 return ret;
741
742 gstrings.len = ret;
743 } else {
744 /* code path for obsolete hooks */
745
746 switch (gstrings.string_set) {
747 case ETH_SS_TEST:
748 if (!ops->self_test_count)
749 return -EOPNOTSUPP;
750 gstrings.len = ops->self_test_count(dev);
751 break;
752 case ETH_SS_STATS:
753 if (!ops->get_stats_count)
754 return -EOPNOTSUPP;
755 gstrings.len = ops->get_stats_count(dev);
756 break;
757 default:
758 return -EINVAL;
759 }
760 }
761
762 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
763 if (!data)
764 return -ENOMEM;
765
766 ops->get_strings(dev, gstrings.string_set, data);
767
768 ret = -EFAULT;
769 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
770 goto out;
771 useraddr += sizeof(gstrings);
772 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
773 goto out;
774 ret = 0;
775
776 out:
777 kfree(data);
778 return ret;
779 }
780
781 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
782 {
783 struct ethtool_value id;
784
785 if (!dev->ethtool_ops->phys_id)
786 return -EOPNOTSUPP;
787
788 if (copy_from_user(&id, useraddr, sizeof(id)))
789 return -EFAULT;
790
791 return dev->ethtool_ops->phys_id(dev, id.data);
792 }
793
794 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
795 {
796 struct ethtool_stats stats;
797 const struct ethtool_ops *ops = dev->ethtool_ops;
798 u64 *data;
799 int ret, n_stats;
800
801 if (!ops->get_ethtool_stats)
802 return -EOPNOTSUPP;
803 if (!ops->get_sset_count && !ops->get_stats_count)
804 return -EOPNOTSUPP;
805
806 if (ops->get_sset_count)
807 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
808 else
809 /* code path for obsolete hook */
810 n_stats = ops->get_stats_count(dev);
811 if (n_stats < 0)
812 return n_stats;
813 WARN_ON(n_stats == 0);
814
815 if (copy_from_user(&stats, useraddr, sizeof(stats)))
816 return -EFAULT;
817
818 stats.n_stats = n_stats;
819 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
820 if (!data)
821 return -ENOMEM;
822
823 ops->get_ethtool_stats(dev, &stats, data);
824
825 ret = -EFAULT;
826 if (copy_to_user(useraddr, &stats, sizeof(stats)))
827 goto out;
828 useraddr += sizeof(stats);
829 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
830 goto out;
831 ret = 0;
832
833 out:
834 kfree(data);
835 return ret;
836 }
837
838 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
839 {
840 struct ethtool_perm_addr epaddr;
841
842 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
843 return -EFAULT;
844
845 if (epaddr.size < dev->addr_len)
846 return -ETOOSMALL;
847 epaddr.size = dev->addr_len;
848
849 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
850 return -EFAULT;
851 useraddr += sizeof(epaddr);
852 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
853 return -EFAULT;
854 return 0;
855 }
856
857 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
858 u32 cmd, u32 (*actor)(struct net_device *))
859 {
860 struct ethtool_value edata = { cmd };
861
862 if (!actor)
863 return -EOPNOTSUPP;
864
865 edata.data = actor(dev);
866
867 if (copy_to_user(useraddr, &edata, sizeof(edata)))
868 return -EFAULT;
869 return 0;
870 }
871
872 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
873 void (*actor)(struct net_device *, u32))
874 {
875 struct ethtool_value edata;
876
877 if (!actor)
878 return -EOPNOTSUPP;
879
880 if (copy_from_user(&edata, useraddr, sizeof(edata)))
881 return -EFAULT;
882
883 actor(dev, edata.data);
884 return 0;
885 }
886
887 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
888 int (*actor)(struct net_device *, u32))
889 {
890 struct ethtool_value edata;
891
892 if (!actor)
893 return -EOPNOTSUPP;
894
895 if (copy_from_user(&edata, useraddr, sizeof(edata)))
896 return -EFAULT;
897
898 return actor(dev, edata.data);
899 }
900
901 static int ethtool_flash_device(struct net_device *dev, char __user *useraddr)
902 {
903 struct ethtool_flash efl;
904
905 if (copy_from_user(&efl, useraddr, sizeof(efl)))
906 return -EFAULT;
907
908 if (!dev->ethtool_ops->flash_device)
909 return -EOPNOTSUPP;
910
911 return dev->ethtool_ops->flash_device(dev, &efl);
912 }
913
914 /* The main entry point in this file. Called from net/core/dev.c */
915
916 int dev_ethtool(struct net *net, struct ifreq *ifr)
917 {
918 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
919 void __user *useraddr = ifr->ifr_data;
920 u32 ethcmd;
921 int rc;
922 unsigned long old_features;
923
924 if (!dev || !netif_device_present(dev))
925 return -ENODEV;
926
927 if (!dev->ethtool_ops)
928 return -EOPNOTSUPP;
929
930 if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
931 return -EFAULT;
932
933 /* Allow some commands to be done by anyone */
934 switch(ethcmd) {
935 case ETHTOOL_GDRVINFO:
936 case ETHTOOL_GMSGLVL:
937 case ETHTOOL_GCOALESCE:
938 case ETHTOOL_GRINGPARAM:
939 case ETHTOOL_GPAUSEPARAM:
940 case ETHTOOL_GRXCSUM:
941 case ETHTOOL_GTXCSUM:
942 case ETHTOOL_GSG:
943 case ETHTOOL_GSTRINGS:
944 case ETHTOOL_GTSO:
945 case ETHTOOL_GPERMADDR:
946 case ETHTOOL_GUFO:
947 case ETHTOOL_GGSO:
948 case ETHTOOL_GFLAGS:
949 case ETHTOOL_GPFLAGS:
950 case ETHTOOL_GRXFH:
951 case ETHTOOL_GRXRINGS:
952 case ETHTOOL_GRXCLSRLCNT:
953 case ETHTOOL_GRXCLSRULE:
954 case ETHTOOL_GRXCLSRLALL:
955 break;
956 default:
957 if (!capable(CAP_NET_ADMIN))
958 return -EPERM;
959 }
960
961 if (dev->ethtool_ops->begin)
962 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
963 return rc;
964
965 old_features = dev->features;
966
967 switch (ethcmd) {
968 case ETHTOOL_GSET:
969 rc = ethtool_get_settings(dev, useraddr);
970 break;
971 case ETHTOOL_SSET:
972 rc = ethtool_set_settings(dev, useraddr);
973 break;
974 case ETHTOOL_GDRVINFO:
975 rc = ethtool_get_drvinfo(dev, useraddr);
976 break;
977 case ETHTOOL_GREGS:
978 rc = ethtool_get_regs(dev, useraddr);
979 break;
980 case ETHTOOL_GWOL:
981 rc = ethtool_get_wol(dev, useraddr);
982 break;
983 case ETHTOOL_SWOL:
984 rc = ethtool_set_wol(dev, useraddr);
985 break;
986 case ETHTOOL_GMSGLVL:
987 rc = ethtool_get_value(dev, useraddr, ethcmd,
988 dev->ethtool_ops->get_msglevel);
989 break;
990 case ETHTOOL_SMSGLVL:
991 rc = ethtool_set_value_void(dev, useraddr,
992 dev->ethtool_ops->set_msglevel);
993 break;
994 case ETHTOOL_NWAY_RST:
995 rc = ethtool_nway_reset(dev);
996 break;
997 case ETHTOOL_GLINK:
998 rc = ethtool_get_value(dev, useraddr, ethcmd,
999 dev->ethtool_ops->get_link);
1000 break;
1001 case ETHTOOL_GEEPROM:
1002 rc = ethtool_get_eeprom(dev, useraddr);
1003 break;
1004 case ETHTOOL_SEEPROM:
1005 rc = ethtool_set_eeprom(dev, useraddr);
1006 break;
1007 case ETHTOOL_GCOALESCE:
1008 rc = ethtool_get_coalesce(dev, useraddr);
1009 break;
1010 case ETHTOOL_SCOALESCE:
1011 rc = ethtool_set_coalesce(dev, useraddr);
1012 break;
1013 case ETHTOOL_GRINGPARAM:
1014 rc = ethtool_get_ringparam(dev, useraddr);
1015 break;
1016 case ETHTOOL_SRINGPARAM:
1017 rc = ethtool_set_ringparam(dev, useraddr);
1018 break;
1019 case ETHTOOL_GPAUSEPARAM:
1020 rc = ethtool_get_pauseparam(dev, useraddr);
1021 break;
1022 case ETHTOOL_SPAUSEPARAM:
1023 rc = ethtool_set_pauseparam(dev, useraddr);
1024 break;
1025 case ETHTOOL_GRXCSUM:
1026 rc = ethtool_get_value(dev, useraddr, ethcmd,
1027 (dev->ethtool_ops->get_rx_csum ?
1028 dev->ethtool_ops->get_rx_csum :
1029 ethtool_op_get_rx_csum));
1030 break;
1031 case ETHTOOL_SRXCSUM:
1032 rc = ethtool_set_rx_csum(dev, useraddr);
1033 break;
1034 case ETHTOOL_GTXCSUM:
1035 rc = ethtool_get_value(dev, useraddr, ethcmd,
1036 (dev->ethtool_ops->get_tx_csum ?
1037 dev->ethtool_ops->get_tx_csum :
1038 ethtool_op_get_tx_csum));
1039 break;
1040 case ETHTOOL_STXCSUM:
1041 rc = ethtool_set_tx_csum(dev, useraddr);
1042 break;
1043 case ETHTOOL_GSG:
1044 rc = ethtool_get_value(dev, useraddr, ethcmd,
1045 (dev->ethtool_ops->get_sg ?
1046 dev->ethtool_ops->get_sg :
1047 ethtool_op_get_sg));
1048 break;
1049 case ETHTOOL_SSG:
1050 rc = ethtool_set_sg(dev, useraddr);
1051 break;
1052 case ETHTOOL_GTSO:
1053 rc = ethtool_get_value(dev, useraddr, ethcmd,
1054 (dev->ethtool_ops->get_tso ?
1055 dev->ethtool_ops->get_tso :
1056 ethtool_op_get_tso));
1057 break;
1058 case ETHTOOL_STSO:
1059 rc = ethtool_set_tso(dev, useraddr);
1060 break;
1061 case ETHTOOL_TEST:
1062 rc = ethtool_self_test(dev, useraddr);
1063 break;
1064 case ETHTOOL_GSTRINGS:
1065 rc = ethtool_get_strings(dev, useraddr);
1066 break;
1067 case ETHTOOL_PHYS_ID:
1068 rc = ethtool_phys_id(dev, useraddr);
1069 break;
1070 case ETHTOOL_GSTATS:
1071 rc = ethtool_get_stats(dev, useraddr);
1072 break;
1073 case ETHTOOL_GPERMADDR:
1074 rc = ethtool_get_perm_addr(dev, useraddr);
1075 break;
1076 case ETHTOOL_GUFO:
1077 rc = ethtool_get_value(dev, useraddr, ethcmd,
1078 (dev->ethtool_ops->get_ufo ?
1079 dev->ethtool_ops->get_ufo :
1080 ethtool_op_get_ufo));
1081 break;
1082 case ETHTOOL_SUFO:
1083 rc = ethtool_set_ufo(dev, useraddr);
1084 break;
1085 case ETHTOOL_GGSO:
1086 rc = ethtool_get_gso(dev, useraddr);
1087 break;
1088 case ETHTOOL_SGSO:
1089 rc = ethtool_set_gso(dev, useraddr);
1090 break;
1091 case ETHTOOL_GFLAGS:
1092 rc = ethtool_get_value(dev, useraddr, ethcmd,
1093 (dev->ethtool_ops->get_flags ?
1094 dev->ethtool_ops->get_flags :
1095 ethtool_op_get_flags));
1096 break;
1097 case ETHTOOL_SFLAGS:
1098 rc = ethtool_set_value(dev, useraddr,
1099 dev->ethtool_ops->set_flags);
1100 break;
1101 case ETHTOOL_GPFLAGS:
1102 rc = ethtool_get_value(dev, useraddr, ethcmd,
1103 dev->ethtool_ops->get_priv_flags);
1104 break;
1105 case ETHTOOL_SPFLAGS:
1106 rc = ethtool_set_value(dev, useraddr,
1107 dev->ethtool_ops->set_priv_flags);
1108 break;
1109 case ETHTOOL_GRXFH:
1110 case ETHTOOL_GRXRINGS:
1111 case ETHTOOL_GRXCLSRLCNT:
1112 case ETHTOOL_GRXCLSRULE:
1113 case ETHTOOL_GRXCLSRLALL:
1114 rc = ethtool_get_rxnfc(dev, useraddr);
1115 break;
1116 case ETHTOOL_SRXFH:
1117 case ETHTOOL_SRXCLSRLDEL:
1118 case ETHTOOL_SRXCLSRLINS:
1119 rc = ethtool_set_rxnfc(dev, useraddr);
1120 break;
1121 case ETHTOOL_GGRO:
1122 rc = ethtool_get_gro(dev, useraddr);
1123 break;
1124 case ETHTOOL_SGRO:
1125 rc = ethtool_set_gro(dev, useraddr);
1126 break;
1127 case ETHTOOL_FLASHDEV:
1128 rc = ethtool_flash_device(dev, useraddr);
1129 break;
1130 default:
1131 rc = -EOPNOTSUPP;
1132 }
1133
1134 if (dev->ethtool_ops->complete)
1135 dev->ethtool_ops->complete(dev);
1136
1137 if (old_features != dev->features)
1138 netdev_features_change(dev);
1139
1140 return rc;
1141 }
1142
1143 EXPORT_SYMBOL(ethtool_op_get_link);
1144 EXPORT_SYMBOL(ethtool_op_get_sg);
1145 EXPORT_SYMBOL(ethtool_op_get_tso);
1146 EXPORT_SYMBOL(ethtool_op_set_sg);
1147 EXPORT_SYMBOL(ethtool_op_set_tso);
1148 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
1149 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
1150 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
1151 EXPORT_SYMBOL(ethtool_op_set_ufo);
1152 EXPORT_SYMBOL(ethtool_op_get_ufo);
1153 EXPORT_SYMBOL(ethtool_op_set_flags);
1154 EXPORT_SYMBOL(ethtool_op_get_flags);
kernels