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ethtool: device independent rx_csum and get_flags routines
[net-next-2.6.git] / net / core / ethtool.c
CommitLineData
1da177e4
LT		 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
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
1896e61f
SS		 33u32 ethtool_op_get_rx_csum(struct net_device *dev)
34{
35 return (dev->features & NETIF_F_ALL_CSUM) != 0;
36}
37
1da177e4
LT		 38u32 ethtool_op_get_tx_csum(struct net_device *dev)
39{
8648b305 40 return (dev->features & NETIF_F_ALL_CSUM) != 0;
1da177e4
LT		 41}
42
43int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
44{
45 if (data)
46 dev->features |= NETIF_F_IP_CSUM;
47 else
48 dev->features &= ~NETIF_F_IP_CSUM;
49
50 return 0;
51}
52
69f6a0fa
JM		 53int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
54{
55 if (data)
56 dev->features |= NETIF_F_HW_CSUM;
57 else
58 dev->features &= ~NETIF_F_HW_CSUM;
59
60 return 0;
61}
6460d948
MC		 62
63int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
64{
65 if (data)
66 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
67 else
68 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
69
70 return 0;
71}
72
1da177e4
LT		 73u32 ethtool_op_get_sg(struct net_device *dev)
74{
75 return (dev->features & NETIF_F_SG) != 0;
76}
77
78int ethtool_op_set_sg(struct net_device *dev, u32 data)
79{
80 if (data)
81 dev->features |= NETIF_F_SG;
82 else
83 dev->features &= ~NETIF_F_SG;
84
85 return 0;
86}
87
88u32 ethtool_op_get_tso(struct net_device *dev)
89{
90 return (dev->features & NETIF_F_TSO) != 0;
91}
92
93int ethtool_op_set_tso(struct net_device *dev, u32 data)
94{
95 if (data)
96 dev->features |= NETIF_F_TSO;
97 else
98 dev->features &= ~NETIF_F_TSO;
99
100 return 0;
101}
102
e89e9cf5
AR		 103u32 ethtool_op_get_ufo(struct net_device *dev)
104{
105 return (dev->features & NETIF_F_UFO) != 0;
106}
107
108int ethtool_op_set_ufo(struct net_device *dev, u32 data)
109{
110 if (data)
111 dev->features |= NETIF_F_UFO;
112 else
113 dev->features &= ~NETIF_F_UFO;
114 return 0;
115}
116
3ae7c0b2
JG		 117/* the following list of flags are the same as their associated
118 * NETIF_F_xxx values in include/linux/netdevice.h
119 */
120static const u32 flags_dup_features =
121 ETH_FLAG_LRO;
122
123u32 ethtool_op_get_flags(struct net_device *dev)
124{
125 /* in the future, this function will probably contain additional
126 * handling for flags which are not so easily handled
127 * by a simple masking operation
128 */
129
130 return dev->features & flags_dup_features;
131}
132
133int ethtool_op_set_flags(struct net_device *dev, u32 data)
134{
135 if (data & ETH_FLAG_LRO)
136 dev->features |= NETIF_F_LRO;
137 else
138 dev->features &= ~NETIF_F_LRO;
139
140 return 0;
141}
142
1da177e4
LT		 143/* Handlers for each ethtool command */
144
145static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
146{
147 struct ethtool_cmd cmd = { ETHTOOL_GSET };
148 int err;
149
150 if (!dev->ethtool_ops->get_settings)
151 return -EOPNOTSUPP;
152
153 err = dev->ethtool_ops->get_settings(dev, &cmd);
154 if (err < 0)
155 return err;
156
157 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
158 return -EFAULT;
159 return 0;
160}
161
162static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
163{
164 struct ethtool_cmd cmd;
165
166 if (!dev->ethtool_ops->set_settings)
167 return -EOPNOTSUPP;
168
169 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
170 return -EFAULT;
171
172 return dev->ethtool_ops->set_settings(dev, &cmd);
173}
174
175static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
176{
177 struct ethtool_drvinfo info;
76fd8593 178 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 179
180 if (!ops->get_drvinfo)
181 return -EOPNOTSUPP;
182
183 memset(&info, 0, sizeof(info));
184 info.cmd = ETHTOOL_GDRVINFO;
185 ops->get_drvinfo(dev, &info);
186
ff03d49f
JG		 187 if (ops->get_sset_count) {
188 int rc;
189
190 rc = ops->get_sset_count(dev, ETH_SS_TEST);
191 if (rc >= 0)
192 info.testinfo_len = rc;
193 rc = ops->get_sset_count(dev, ETH_SS_STATS);
194 if (rc >= 0)
195 info.n_stats = rc;
339bf024
JG		 196 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
197 if (rc >= 0)
198 info.n_priv_flags = rc;
ff03d49f
JG		 199 } else {
200 /* code path for obsolete hooks */
201
202 if (ops->self_test_count)
203 info.testinfo_len = ops->self_test_count(dev);
204 if (ops->get_stats_count)
205 info.n_stats = ops->get_stats_count(dev);
206 }
1da177e4
LT		 207 if (ops->get_regs_len)
208 info.regdump_len = ops->get_regs_len(dev);
209 if (ops->get_eeprom_len)
210 info.eedump_len = ops->get_eeprom_len(dev);
211
212 if (copy_to_user(useraddr, &info, sizeof(info)))
213 return -EFAULT;
214 return 0;
215}
216
59089d8d 217static int ethtool_set_rxnfc(struct net_device *dev, void __user *useraddr)
0853ad66
SB		 218{
219 struct ethtool_rxnfc cmd;
220
59089d8d 221 if (!dev->ethtool_ops->set_rxnfc)
0853ad66
SB		 222 return -EOPNOTSUPP;
223
224 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
225 return -EFAULT;
226
59089d8d 227 return dev->ethtool_ops->set_rxnfc(dev, &cmd);
0853ad66
SB		 228}
229
59089d8d 230static int ethtool_get_rxnfc(struct net_device *dev, void __user *useraddr)
0853ad66
SB		 231{
232 struct ethtool_rxnfc info;
59089d8d
SB		 233 const struct ethtool_ops *ops = dev->ethtool_ops;
234 int ret;
235 void *rule_buf = NULL;
0853ad66 236
59089d8d 237 if (!ops->get_rxnfc)
0853ad66
SB		 238 return -EOPNOTSUPP;
239
240 if (copy_from_user(&info, useraddr, sizeof(info)))
241 return -EFAULT;
242
59089d8d
SB		 243 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
244 if (info.rule_cnt > 0) {
245 rule_buf = kmalloc(info.rule_cnt * sizeof(u32),
246 GFP_USER);
247 if (!rule_buf)
248 return -ENOMEM;
249 }
250 }
0853ad66 251
59089d8d
SB		 252 ret = ops->get_rxnfc(dev, &info, rule_buf);
253 if (ret < 0)
254 goto err_out;
255
256 ret = -EFAULT;
0853ad66 257 if (copy_to_user(useraddr, &info, sizeof(info)))
59089d8d
SB		 258 goto err_out;
259
260 if (rule_buf) {
261 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
262 if (copy_to_user(useraddr, rule_buf,
263 info.rule_cnt * sizeof(u32)))
264 goto err_out;
265 }
266 ret = 0;
267
268err_out:
c9caceca 269 kfree(rule_buf);
59089d8d
SB		 270
271 return ret;
0853ad66
SB		 272}
273
1da177e4
LT		 274static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
275{
276 struct ethtool_regs regs;
76fd8593 277 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 278 void *regbuf;
279 int reglen, ret;
280
281 if (!ops->get_regs || !ops->get_regs_len)
282 return -EOPNOTSUPP;
283
284 if (copy_from_user(&regs, useraddr, sizeof(regs)))
285 return -EFAULT;
286
287 reglen = ops->get_regs_len(dev);
288 if (regs.len > reglen)
289 regs.len = reglen;
290
291 regbuf = kmalloc(reglen, GFP_USER);
292 if (!regbuf)
293 return -ENOMEM;
294
295 ops->get_regs(dev, &regs, regbuf);
296
297 ret = -EFAULT;
298 if (copy_to_user(useraddr, &regs, sizeof(regs)))
299 goto out;
300 useraddr += offsetof(struct ethtool_regs, data);
301 if (copy_to_user(useraddr, regbuf, regs.len))
302 goto out;
303 ret = 0;
304
305 out:
306 kfree(regbuf);
307 return ret;
308}
309
310static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
311{
312 struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
313
314 if (!dev->ethtool_ops->get_wol)
315 return -EOPNOTSUPP;
316
317 dev->ethtool_ops->get_wol(dev, &wol);
318
319 if (copy_to_user(useraddr, &wol, sizeof(wol)))
320 return -EFAULT;
321 return 0;
322}
323
324static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
325{
326 struct ethtool_wolinfo wol;
327
328 if (!dev->ethtool_ops->set_wol)
329 return -EOPNOTSUPP;
330
331 if (copy_from_user(&wol, useraddr, sizeof(wol)))
332 return -EFAULT;
333
334 return dev->ethtool_ops->set_wol(dev, &wol);
335}
336
1da177e4
LT		 337static int ethtool_nway_reset(struct net_device *dev)
338{
339 if (!dev->ethtool_ops->nway_reset)
340 return -EOPNOTSUPP;
341
342 return dev->ethtool_ops->nway_reset(dev);
343}
344
1da177e4
LT		 345static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
346{
347 struct ethtool_eeprom eeprom;
76fd8593 348 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 349 void __user *userbuf = useraddr + sizeof(eeprom);
350 u32 bytes_remaining;
1da177e4 351 u8 *data;
b131dd5d 352 int ret = 0;
1da177e4
LT		 353
354 if (!ops->get_eeprom || !ops->get_eeprom_len)
355 return -EOPNOTSUPP;
356
357 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
358 return -EFAULT;
359
360 /* Check for wrap and zero */
361 if (eeprom.offset + eeprom.len <= eeprom.offset)
362 return -EINVAL;
363
364 /* Check for exceeding total eeprom len */
365 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
366 return -EINVAL;
367
b131dd5d 368 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 369 if (!data)
370 return -ENOMEM;
371
b131dd5d
MSB		 372 bytes_remaining = eeprom.len;
373 while (bytes_remaining > 0) {
374 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
375
376 ret = ops->get_eeprom(dev, &eeprom, data);
377 if (ret)
378 break;
379 if (copy_to_user(userbuf, data, eeprom.len)) {
380 ret = -EFAULT;
381 break;
382 }
383 userbuf += eeprom.len;
384 eeprom.offset += eeprom.len;
385 bytes_remaining -= eeprom.len;
386 }
1da177e4 387
c5835df9
MSB		 388 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
389 eeprom.offset -= eeprom.len;
390 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
391 ret = -EFAULT;
392
1da177e4
LT		 393 kfree(data);
394 return ret;
395}
396
397static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
398{
399 struct ethtool_eeprom eeprom;
76fd8593 400 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 401 void __user *userbuf = useraddr + sizeof(eeprom);
402 u32 bytes_remaining;
1da177e4 403 u8 *data;
b131dd5d 404 int ret = 0;
1da177e4
LT		 405
406 if (!ops->set_eeprom || !ops->get_eeprom_len)
407 return -EOPNOTSUPP;
408
409 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
410 return -EFAULT;
411
412 /* Check for wrap and zero */
413 if (eeprom.offset + eeprom.len <= eeprom.offset)
414 return -EINVAL;
415
416 /* Check for exceeding total eeprom len */
417 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
418 return -EINVAL;
419
b131dd5d 420 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 421 if (!data)
422 return -ENOMEM;
423
b131dd5d
MSB		 424 bytes_remaining = eeprom.len;
425 while (bytes_remaining > 0) {
426 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
427
428 if (copy_from_user(data, userbuf, eeprom.len)) {
429 ret = -EFAULT;
430 break;
431 }
432 ret = ops->set_eeprom(dev, &eeprom, data);
433 if (ret)
434 break;
435 userbuf += eeprom.len;
436 eeprom.offset += eeprom.len;
437 bytes_remaining -= eeprom.len;
438 }
1da177e4 439
1da177e4
LT		 440 kfree(data);
441 return ret;
442}
443
444static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
445{
446 struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
447
448 if (!dev->ethtool_ops->get_coalesce)
449 return -EOPNOTSUPP;
450
451 dev->ethtool_ops->get_coalesce(dev, &coalesce);
452
453 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
454 return -EFAULT;
455 return 0;
456}
457
458static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
459{
460 struct ethtool_coalesce coalesce;
461
fa04ae5c 462 if (!dev->ethtool_ops->set_coalesce)
1da177e4
LT		 463 return -EOPNOTSUPP;
464
465 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
466 return -EFAULT;
467
468 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
469}
470
471static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
472{
473 struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
474
475 if (!dev->ethtool_ops->get_ringparam)
476 return -EOPNOTSUPP;
477
478 dev->ethtool_ops->get_ringparam(dev, &ringparam);
479
480 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
481 return -EFAULT;
482 return 0;
483}
484
485static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
486{
487 struct ethtool_ringparam ringparam;
488
489 if (!dev->ethtool_ops->set_ringparam)
490 return -EOPNOTSUPP;
491
492 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
493 return -EFAULT;
494
495 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
496}
497
498static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
499{
500 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
501
502 if (!dev->ethtool_ops->get_pauseparam)
503 return -EOPNOTSUPP;
504
505 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
506
507 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
508 return -EFAULT;
509 return 0;
510}
511
512static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
513{
514 struct ethtool_pauseparam pauseparam;
515
e1b90c41 516 if (!dev->ethtool_ops->set_pauseparam)
1da177e4
LT		 517 return -EOPNOTSUPP;
518
519 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
520 return -EFAULT;
521
522 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
523}
524
1da177e4
LT		 525static int __ethtool_set_sg(struct net_device *dev, u32 data)
526{
527 int err;
528
529 if (!data && dev->ethtool_ops->set_tso) {
530 err = dev->ethtool_ops->set_tso(dev, 0);
531 if (err)
532 return err;
533 }
534
e89e9cf5
AR		 535 if (!data && dev->ethtool_ops->set_ufo) {
536 err = dev->ethtool_ops->set_ufo(dev, 0);
537 if (err)
538 return err;
539 }
1da177e4
LT		 540 return dev->ethtool_ops->set_sg(dev, data);
541}
542
543static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
544{
545 struct ethtool_value edata;
546 int err;
547
548 if (!dev->ethtool_ops->set_tx_csum)
549 return -EOPNOTSUPP;
550
551 if (copy_from_user(&edata, useraddr, sizeof(edata)))
552 return -EFAULT;
553
554 if (!edata.data && dev->ethtool_ops->set_sg) {
555 err = __ethtool_set_sg(dev, 0);
556 if (err)
557 return err;
558 }
559
560 return dev->ethtool_ops->set_tx_csum(dev, edata.data);
561}
562
b240a0e5
HX		 563static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
564{
565 struct ethtool_value edata;
566
567 if (!dev->ethtool_ops->set_rx_csum)
568 return -EOPNOTSUPP;
569
570 if (copy_from_user(&edata, useraddr, sizeof(edata)))
571 return -EFAULT;
572
573 if (!edata.data && dev->ethtool_ops->set_sg)
574 dev->features &= ~NETIF_F_GRO;
575
576 return dev->ethtool_ops->set_rx_csum(dev, edata.data);
577}
578
1da177e4
LT		 579static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
580{
581 struct ethtool_value edata;
582
583 if (!dev->ethtool_ops->set_sg)
584 return -EOPNOTSUPP;
585
586 if (copy_from_user(&edata, useraddr, sizeof(edata)))
587 return -EFAULT;
588
4ec93edb 589 if (edata.data &&
8648b305 590 !(dev->features & NETIF_F_ALL_CSUM))
1da177e4
LT		 591 return -EINVAL;
592
593 return __ethtool_set_sg(dev, edata.data);
594}
595
1da177e4
LT		 596static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
597{
598 struct ethtool_value edata;
599
600 if (!dev->ethtool_ops->set_tso)
601 return -EOPNOTSUPP;
602
603 if (copy_from_user(&edata, useraddr, sizeof(edata)))
604 return -EFAULT;
605
606 if (edata.data && !(dev->features & NETIF_F_SG))
607 return -EINVAL;
608
609 return dev->ethtool_ops->set_tso(dev, edata.data);
610}
611
e89e9cf5
AR		 612static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
613{
614 struct ethtool_value edata;
615
616 if (!dev->ethtool_ops->set_ufo)
617 return -EOPNOTSUPP;
618 if (copy_from_user(&edata, useraddr, sizeof(edata)))
619 return -EFAULT;
620 if (edata.data && !(dev->features & NETIF_F_SG))
621 return -EINVAL;
622 if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
623 return -EINVAL;
624 return dev->ethtool_ops->set_ufo(dev, edata.data);
625}
626
37c3185a
HX		 627static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
628{
629 struct ethtool_value edata = { ETHTOOL_GGSO };
630
631 edata.data = dev->features & NETIF_F_GSO;
632 if (copy_to_user(useraddr, &edata, sizeof(edata)))
633 return -EFAULT;
634 return 0;
635}
636
637static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
638{
639 struct ethtool_value edata;
640
641 if (copy_from_user(&edata, useraddr, sizeof(edata)))
642 return -EFAULT;
643 if (edata.data)
644 dev->features |= NETIF_F_GSO;
645 else
646 dev->features &= ~NETIF_F_GSO;
647 return 0;
648}
649
b240a0e5
HX		 650static int ethtool_get_gro(struct net_device *dev, char __user *useraddr)
651{
652 struct ethtool_value edata = { ETHTOOL_GGRO };
653
654 edata.data = dev->features & NETIF_F_GRO;
655 if (copy_to_user(useraddr, &edata, sizeof(edata)))
656 return -EFAULT;
657 return 0;
658}
659
660static int ethtool_set_gro(struct net_device *dev, char __user *useraddr)
661{
662 struct ethtool_value edata;
663
664 if (copy_from_user(&edata, useraddr, sizeof(edata)))
665 return -EFAULT;
666
667 if (edata.data) {
668 if (!dev->ethtool_ops->get_rx_csum ||
669 !dev->ethtool_ops->get_rx_csum(dev))
670 return -EINVAL;
671 dev->features |= NETIF_F_GRO;
672 } else
673 dev->features &= ~NETIF_F_GRO;
674
675 return 0;
676}
677
1da177e4
LT		 678static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
679{
680 struct ethtool_test test;
76fd8593 681 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 682 u64 *data;
ff03d49f 683 int ret, test_len;
1da177e4 684
ff03d49f
JG		 685 if (!ops->self_test)
686 return -EOPNOTSUPP;
687 if (!ops->get_sset_count && !ops->self_test_count)
1da177e4
LT		 688 return -EOPNOTSUPP;
689
ff03d49f
JG		 690 if (ops->get_sset_count)
691 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
692 else
693 /* code path for obsolete hook */
694 test_len = ops->self_test_count(dev);
695 if (test_len < 0)
696 return test_len;
697 WARN_ON(test_len == 0);
698
1da177e4
LT		 699 if (copy_from_user(&test, useraddr, sizeof(test)))
700 return -EFAULT;
701
ff03d49f
JG		 702 test.len = test_len;
703 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1da177e4
LT		 704 if (!data)
705 return -ENOMEM;
706
707 ops->self_test(dev, &test, data);
708
709 ret = -EFAULT;
710 if (copy_to_user(useraddr, &test, sizeof(test)))
711 goto out;
712 useraddr += sizeof(test);
713 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
714 goto out;
715 ret = 0;
716
717 out:
718 kfree(data);
719 return ret;
720}
721
722static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
723{
724 struct ethtool_gstrings gstrings;
76fd8593 725 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 726 u8 *data;
727 int ret;
728
729 if (!ops->get_strings)
730 return -EOPNOTSUPP;
731
732 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
733 return -EFAULT;
734
ff03d49f
JG		 735 if (ops->get_sset_count) {
736 ret = ops->get_sset_count(dev, gstrings.string_set);
737 if (ret < 0)
738 return ret;
739
740 gstrings.len = ret;
741 } else {
742 /* code path for obsolete hooks */
743
744 switch (gstrings.string_set) {
745 case ETH_SS_TEST:
746 if (!ops->self_test_count)
747 return -EOPNOTSUPP;
748 gstrings.len = ops->self_test_count(dev);
749 break;
750 case ETH_SS_STATS:
751 if (!ops->get_stats_count)
752 return -EOPNOTSUPP;
753 gstrings.len = ops->get_stats_count(dev);
754 break;
755 default:
756 return -EINVAL;
757 }
1da177e4
LT		 758 }
759
760 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
761 if (!data)
762 return -ENOMEM;
763
764 ops->get_strings(dev, gstrings.string_set, data);
765
766 ret = -EFAULT;
767 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
768 goto out;
769 useraddr += sizeof(gstrings);
770 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
771 goto out;
772 ret = 0;
773
774 out:
775 kfree(data);
776 return ret;
777}
778
779static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
780{
781 struct ethtool_value id;
782
783 if (!dev->ethtool_ops->phys_id)
784 return -EOPNOTSUPP;
785
786 if (copy_from_user(&id, useraddr, sizeof(id)))
787 return -EFAULT;
788
789 return dev->ethtool_ops->phys_id(dev, id.data);
790}
791
792static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
793{
794 struct ethtool_stats stats;
76fd8593 795 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 796 u64 *data;
ff03d49f 797 int ret, n_stats;
1da177e4 798
ff03d49f
JG		 799 if (!ops->get_ethtool_stats)
800 return -EOPNOTSUPP;
801 if (!ops->get_sset_count && !ops->get_stats_count)
1da177e4
LT		 802 return -EOPNOTSUPP;
803
ff03d49f
JG		 804 if (ops->get_sset_count)
805 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
806 else
807 /* code path for obsolete hook */
808 n_stats = ops->get_stats_count(dev);
809 if (n_stats < 0)
810 return n_stats;
811 WARN_ON(n_stats == 0);
812
1da177e4
LT		 813 if (copy_from_user(&stats, useraddr, sizeof(stats)))
814 return -EFAULT;
815
ff03d49f
JG		 816 stats.n_stats = n_stats;
817 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1da177e4
LT		 818 if (!data)
819 return -ENOMEM;
820
821 ops->get_ethtool_stats(dev, &stats, data);
822
823 ret = -EFAULT;
824 if (copy_to_user(useraddr, &stats, sizeof(stats)))
825 goto out;
826 useraddr += sizeof(stats);
827 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
828 goto out;
829 ret = 0;
830
831 out:
832 kfree(data);
833 return ret;
834}
835
0bf0519d 836static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
a6f9a705
JW		 837{
838 struct ethtool_perm_addr epaddr;
a6f9a705 839
313674af 840 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
a6f9a705
JW		 841 return -EFAULT;
842
313674af
MW		 843 if (epaddr.size < dev->addr_len)
844 return -ETOOSMALL;
845 epaddr.size = dev->addr_len;
a6f9a705 846
a6f9a705 847 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
313674af 848 return -EFAULT;
a6f9a705 849 useraddr += sizeof(epaddr);
313674af
MW		 850 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
851 return -EFAULT;
852 return 0;
a6f9a705
JW		 853}
854
13c99b24
JG		 855static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
856 u32 cmd, u32 (*actor)(struct net_device *))
3ae7c0b2 857{
13c99b24 858 struct ethtool_value edata = { cmd };
3ae7c0b2 859
13c99b24 860 if (!actor)
3ae7c0b2
JG		 861 return -EOPNOTSUPP;
862
13c99b24 863 edata.data = actor(dev);
3ae7c0b2
JG		 864
865 if (copy_to_user(useraddr, &edata, sizeof(edata)))
866 return -EFAULT;
867 return 0;
868}
869
13c99b24
JG		 870static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
871 void (*actor)(struct net_device *, u32))
3ae7c0b2
JG		 872{
873 struct ethtool_value edata;
874
13c99b24 875 if (!actor)
3ae7c0b2
JG		 876 return -EOPNOTSUPP;
877
878 if (copy_from_user(&edata, useraddr, sizeof(edata)))
879 return -EFAULT;
880
13c99b24 881 actor(dev, edata.data);
339bf024
JG		 882 return 0;
883}
884
13c99b24
JG		 885static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
886 int (*actor)(struct net_device *, u32))
339bf024
JG		 887{
888 struct ethtool_value edata;
889
13c99b24 890 if (!actor)
339bf024
JG		 891 return -EOPNOTSUPP;
892
893 if (copy_from_user(&edata, useraddr, sizeof(edata)))
894 return -EFAULT;
895
13c99b24 896 return actor(dev, edata.data);
339bf024
JG		 897}
898
1da177e4
LT		 899/* The main entry point in this file. Called from net/core/dev.c */
900
881d966b 901int dev_ethtool(struct net *net, struct ifreq *ifr)
1da177e4 902{
881d966b 903 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1da177e4
LT		 904 void __user *useraddr = ifr->ifr_data;
905 u32 ethcmd;
906 int rc;
81e81575 907 unsigned long old_features;
1da177e4 908
1da177e4
LT		 909 if (!dev || !netif_device_present(dev))
910 return -ENODEV;
911
912 if (!dev->ethtool_ops)
61a44b9c 913 return -EOPNOTSUPP;
1da177e4
LT		 914
915 if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
916 return -EFAULT;
917
75f3123c
SH		 918 /* Allow some commands to be done by anyone */
919 switch(ethcmd) {
75f3123c 920 case ETHTOOL_GDRVINFO:
75f3123c 921 case ETHTOOL_GMSGLVL:
75f3123c
SH		 922 case ETHTOOL_GCOALESCE:
923 case ETHTOOL_GRINGPARAM:
924 case ETHTOOL_GPAUSEPARAM:
925 case ETHTOOL_GRXCSUM:
926 case ETHTOOL_GTXCSUM:
927 case ETHTOOL_GSG:
928 case ETHTOOL_GSTRINGS:
75f3123c
SH		 929 case ETHTOOL_GTSO:
930 case ETHTOOL_GPERMADDR:
931 case ETHTOOL_GUFO:
932 case ETHTOOL_GGSO:
339bf024
JG		 933 case ETHTOOL_GFLAGS:
934 case ETHTOOL_GPFLAGS:
0853ad66 935 case ETHTOOL_GRXFH:
59089d8d
SB		 936 case ETHTOOL_GRXRINGS:
937 case ETHTOOL_GRXCLSRLCNT:
938 case ETHTOOL_GRXCLSRULE:
939 case ETHTOOL_GRXCLSRLALL:
75f3123c
SH		 940 break;
941 default:
942 if (!capable(CAP_NET_ADMIN))
943 return -EPERM;
944 }
945
e71a4783 946 if (dev->ethtool_ops->begin)
1da177e4
LT		 947 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
948 return rc;
949
d8a33ac4
SH		 950 old_features = dev->features;
951
1da177e4
LT		 952 switch (ethcmd) {
953 case ETHTOOL_GSET:
954 rc = ethtool_get_settings(dev, useraddr);
955 break;
956 case ETHTOOL_SSET:
957 rc = ethtool_set_settings(dev, useraddr);
958 break;
959 case ETHTOOL_GDRVINFO:
960 rc = ethtool_get_drvinfo(dev, useraddr);
1da177e4
LT		 961 break;
962 case ETHTOOL_GREGS:
963 rc = ethtool_get_regs(dev, useraddr);
964 break;
965 case ETHTOOL_GWOL:
966 rc = ethtool_get_wol(dev, useraddr);
967 break;
968 case ETHTOOL_SWOL:
969 rc = ethtool_set_wol(dev, useraddr);
970 break;
971 case ETHTOOL_GMSGLVL:
13c99b24
JG		 972 rc = ethtool_get_value(dev, useraddr, ethcmd,
973 dev->ethtool_ops->get_msglevel);
1da177e4
LT		 974 break;
975 case ETHTOOL_SMSGLVL:
13c99b24
JG		 976 rc = ethtool_set_value_void(dev, useraddr,
977 dev->ethtool_ops->set_msglevel);
1da177e4
LT		 978 break;
979 case ETHTOOL_NWAY_RST:
980 rc = ethtool_nway_reset(dev);
981 break;
982 case ETHTOOL_GLINK:
13c99b24
JG		 983 rc = ethtool_get_value(dev, useraddr, ethcmd,
984 dev->ethtool_ops->get_link);
1da177e4
LT		 985 break;
986 case ETHTOOL_GEEPROM:
987 rc = ethtool_get_eeprom(dev, useraddr);
988 break;
989 case ETHTOOL_SEEPROM:
990 rc = ethtool_set_eeprom(dev, useraddr);
991 break;
992 case ETHTOOL_GCOALESCE:
993 rc = ethtool_get_coalesce(dev, useraddr);
994 break;
995 case ETHTOOL_SCOALESCE:
996 rc = ethtool_set_coalesce(dev, useraddr);
997 break;
998 case ETHTOOL_GRINGPARAM:
999 rc = ethtool_get_ringparam(dev, useraddr);
1000 break;
1001 case ETHTOOL_SRINGPARAM:
1002 rc = ethtool_set_ringparam(dev, useraddr);
1003 break;
1004 case ETHTOOL_GPAUSEPARAM:
1005 rc = ethtool_get_pauseparam(dev, useraddr);
1006 break;
1007 case ETHTOOL_SPAUSEPARAM:
1008 rc = ethtool_set_pauseparam(dev, useraddr);
1009 break;
1010 case ETHTOOL_GRXCSUM:
13c99b24 1011 rc = ethtool_get_value(dev, useraddr, ethcmd,
1896e61f
SS		 1012 (dev->ethtool_ops->get_rx_csum ?
1013 dev->ethtool_ops->get_rx_csum :
1014 ethtool_op_get_rx_csum));
1da177e4
LT		 1015 break;
1016 case ETHTOOL_SRXCSUM:
b240a0e5 1017 rc = ethtool_set_rx_csum(dev, useraddr);
1da177e4
LT		 1018 break;
1019 case ETHTOOL_GTXCSUM:
13c99b24 1020 rc = ethtool_get_value(dev, useraddr, ethcmd,
88d3aafd
JG		 1021 (dev->ethtool_ops->get_tx_csum ?
1022 dev->ethtool_ops->get_tx_csum :
1023 ethtool_op_get_tx_csum));
1da177e4
LT		 1024 break;
1025 case ETHTOOL_STXCSUM:
1026 rc = ethtool_set_tx_csum(dev, useraddr);
1027 break;
1028 case ETHTOOL_GSG:
13c99b24 1029 rc = ethtool_get_value(dev, useraddr, ethcmd,
88d3aafd
JG		 1030 (dev->ethtool_ops->get_sg ?
1031 dev->ethtool_ops->get_sg :
1032 ethtool_op_get_sg));
1da177e4
LT		 1033 break;
1034 case ETHTOOL_SSG:
1035 rc = ethtool_set_sg(dev, useraddr);
1036 break;
1037 case ETHTOOL_GTSO:
13c99b24 1038 rc = ethtool_get_value(dev, useraddr, ethcmd,
88d3aafd
JG		 1039 (dev->ethtool_ops->get_tso ?
1040 dev->ethtool_ops->get_tso :
1041 ethtool_op_get_tso));
1da177e4
LT		 1042 break;
1043 case ETHTOOL_STSO:
1044 rc = ethtool_set_tso(dev, useraddr);
1045 break;
1046 case ETHTOOL_TEST:
1047 rc = ethtool_self_test(dev, useraddr);
1048 break;
1049 case ETHTOOL_GSTRINGS:
1050 rc = ethtool_get_strings(dev, useraddr);
1051 break;
1052 case ETHTOOL_PHYS_ID:
1053 rc = ethtool_phys_id(dev, useraddr);
1054 break;
1055 case ETHTOOL_GSTATS:
1056 rc = ethtool_get_stats(dev, useraddr);
1057 break;
a6f9a705
JW		 1058 case ETHTOOL_GPERMADDR:
1059 rc = ethtool_get_perm_addr(dev, useraddr);
1060 break;
e89e9cf5 1061 case ETHTOOL_GUFO:
13c99b24 1062 rc = ethtool_get_value(dev, useraddr, ethcmd,
88d3aafd
JG		 1063 (dev->ethtool_ops->get_ufo ?
1064 dev->ethtool_ops->get_ufo :
1065 ethtool_op_get_ufo));
e89e9cf5
AR		 1066 break;
1067 case ETHTOOL_SUFO:
1068 rc = ethtool_set_ufo(dev, useraddr);
1069 break;
37c3185a
HX		 1070 case ETHTOOL_GGSO:
1071 rc = ethtool_get_gso(dev, useraddr);
1072 break;
1073 case ETHTOOL_SGSO:
1074 rc = ethtool_set_gso(dev, useraddr);
1075 break;
3ae7c0b2 1076 case ETHTOOL_GFLAGS:
13c99b24 1077 rc = ethtool_get_value(dev, useraddr, ethcmd,
1896e61f
SS		 1078 (dev->ethtool_ops->get_flags ?
1079 dev->ethtool_ops->get_flags :
1080 ethtool_op_get_flags));
3ae7c0b2
JG		 1081 break;
1082 case ETHTOOL_SFLAGS:
13c99b24
JG		 1083 rc = ethtool_set_value(dev, useraddr,
1084 dev->ethtool_ops->set_flags);
3ae7c0b2 1085 break;
339bf024 1086 case ETHTOOL_GPFLAGS:
13c99b24
JG		 1087 rc = ethtool_get_value(dev, useraddr, ethcmd,
1088 dev->ethtool_ops->get_priv_flags);
339bf024
JG		 1089 break;
1090 case ETHTOOL_SPFLAGS:
13c99b24
JG		 1091 rc = ethtool_set_value(dev, useraddr,
1092 dev->ethtool_ops->set_priv_flags);
339bf024 1093 break;
0853ad66 1094 case ETHTOOL_GRXFH:
59089d8d
SB		 1095 case ETHTOOL_GRXRINGS:
1096 case ETHTOOL_GRXCLSRLCNT:
1097 case ETHTOOL_GRXCLSRULE:
1098 case ETHTOOL_GRXCLSRLALL:
1099 rc = ethtool_get_rxnfc(dev, useraddr);
0853ad66
SB		 1100 break;
1101 case ETHTOOL_SRXFH:
59089d8d
SB		 1102 case ETHTOOL_SRXCLSRLDEL:
1103 case ETHTOOL_SRXCLSRLINS:
1104 rc = ethtool_set_rxnfc(dev, useraddr);
0853ad66 1105 break;
b240a0e5
HX		 1106 case ETHTOOL_GGRO:
1107 rc = ethtool_get_gro(dev, useraddr);
1108 break;
1109 case ETHTOOL_SGRO:
1110 rc = ethtool_set_gro(dev, useraddr);
1111 break;
1da177e4 1112 default:
61a44b9c 1113 rc = -EOPNOTSUPP;
1da177e4 1114 }
4ec93edb 1115
e71a4783 1116 if (dev->ethtool_ops->complete)
1da177e4 1117 dev->ethtool_ops->complete(dev);
d8a33ac4
SH		 1118
1119 if (old_features != dev->features)
1120 netdev_features_change(dev);
1121
1da177e4 1122 return rc;
1da177e4
LT		 1123}
1124
1da177e4
LT		 1125EXPORT_SYMBOL(ethtool_op_get_link);
1126EXPORT_SYMBOL(ethtool_op_get_sg);
1127EXPORT_SYMBOL(ethtool_op_get_tso);
1128EXPORT_SYMBOL(ethtool_op_get_tx_csum);
1129EXPORT_SYMBOL(ethtool_op_set_sg);
1130EXPORT_SYMBOL(ethtool_op_set_tso);
1131EXPORT_SYMBOL(ethtool_op_set_tx_csum);
69f6a0fa 1132EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
6460d948 1133EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
e89e9cf5
AR		 1134EXPORT_SYMBOL(ethtool_op_set_ufo);
1135EXPORT_SYMBOL(ethtool_op_get_ufo);
3ae7c0b2
JG		 1136EXPORT_SYMBOL(ethtool_op_set_flags);
1137EXPORT_SYMBOL(ethtool_op_get_flags);
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