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Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-artful-kernel.git] / net / core / ethtool.c
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 <linux/bitops.h>
21 #include <linux/uaccess.h>
22 #include <linux/vmalloc.h>
23 #include <linux/slab.h>
24
25 /*
26 * Some useful ethtool_ops methods that're device independent.
27 * If we find that all drivers want to do the same thing here,
28 * we can turn these into dev_() function calls.
29 */
30
31 u32 ethtool_op_get_link(struct net_device *dev)
32 {
33 return netif_carrier_ok(dev) ? 1 : 0;
34 }
35 EXPORT_SYMBOL(ethtool_op_get_link);
36
37 u32 ethtool_op_get_rx_csum(struct net_device *dev)
38 {
39 return (dev->features & NETIF_F_ALL_CSUM) != 0;
40 }
41 EXPORT_SYMBOL(ethtool_op_get_rx_csum);
42
43 u32 ethtool_op_get_tx_csum(struct net_device *dev)
44 {
45 return (dev->features & NETIF_F_ALL_CSUM) != 0;
46 }
47 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
48
49 int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
50 {
51 if (data)
52 dev->features |= NETIF_F_IP_CSUM;
53 else
54 dev->features &= ~NETIF_F_IP_CSUM;
55
56 return 0;
57 }
58
59 int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
60 {
61 if (data)
62 dev->features |= NETIF_F_HW_CSUM;
63 else
64 dev->features &= ~NETIF_F_HW_CSUM;
65
66 return 0;
67 }
68 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
69
70 int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
71 {
72 if (data)
73 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
74 else
75 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
76
77 return 0;
78 }
79 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
80
81 u32 ethtool_op_get_sg(struct net_device *dev)
82 {
83 return (dev->features & NETIF_F_SG) != 0;
84 }
85 EXPORT_SYMBOL(ethtool_op_get_sg);
86
87 int ethtool_op_set_sg(struct net_device *dev, u32 data)
88 {
89 if (data)
90 dev->features |= NETIF_F_SG;
91 else
92 dev->features &= ~NETIF_F_SG;
93
94 return 0;
95 }
96 EXPORT_SYMBOL(ethtool_op_set_sg);
97
98 u32 ethtool_op_get_tso(struct net_device *dev)
99 {
100 return (dev->features & NETIF_F_TSO) != 0;
101 }
102 EXPORT_SYMBOL(ethtool_op_get_tso);
103
104 int ethtool_op_set_tso(struct net_device *dev, u32 data)
105 {
106 if (data)
107 dev->features |= NETIF_F_TSO;
108 else
109 dev->features &= ~NETIF_F_TSO;
110
111 return 0;
112 }
113 EXPORT_SYMBOL(ethtool_op_set_tso);
114
115 u32 ethtool_op_get_ufo(struct net_device *dev)
116 {
117 return (dev->features & NETIF_F_UFO) != 0;
118 }
119 EXPORT_SYMBOL(ethtool_op_get_ufo);
120
121 int ethtool_op_set_ufo(struct net_device *dev, u32 data)
122 {
123 if (data)
124 dev->features |= NETIF_F_UFO;
125 else
126 dev->features &= ~NETIF_F_UFO;
127 return 0;
128 }
129 EXPORT_SYMBOL(ethtool_op_set_ufo);
130
131 /* the following list of flags are the same as their associated
132 * NETIF_F_xxx values in include/linux/netdevice.h
133 */
134 static const u32 flags_dup_features =
135 (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | ETH_FLAG_NTUPLE |
136 ETH_FLAG_RXHASH);
137
138 u32 ethtool_op_get_flags(struct net_device *dev)
139 {
140 /* in the future, this function will probably contain additional
141 * handling for flags which are not so easily handled
142 * by a simple masking operation
143 */
144
145 return dev->features & flags_dup_features;
146 }
147 EXPORT_SYMBOL(ethtool_op_get_flags);
148
149 int ethtool_op_set_flags(struct net_device *dev, u32 data, u32 supported)
150 {
151 if (data & ~supported)
152 return -EINVAL;
153
154 dev->features = ((dev->features & ~flags_dup_features) |
155 (data & flags_dup_features));
156 return 0;
157 }
158 EXPORT_SYMBOL(ethtool_op_set_flags);
159
160 void ethtool_ntuple_flush(struct net_device *dev)
161 {
162 struct ethtool_rx_ntuple_flow_spec_container *fsc, *f;
163
164 list_for_each_entry_safe(fsc, f, &dev->ethtool_ntuple_list.list, list) {
165 list_del(&fsc->list);
166 kfree(fsc);
167 }
168 dev->ethtool_ntuple_list.count = 0;
169 }
170 EXPORT_SYMBOL(ethtool_ntuple_flush);
171
172 /* Handlers for each ethtool command */
173
174 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
175 {
176 struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET };
177 int err;
178
179 if (!dev->ethtool_ops->get_settings)
180 return -EOPNOTSUPP;
181
182 err = dev->ethtool_ops->get_settings(dev, &cmd);
183 if (err < 0)
184 return err;
185
186 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
187 return -EFAULT;
188 return 0;
189 }
190
191 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
192 {
193 struct ethtool_cmd cmd;
194
195 if (!dev->ethtool_ops->set_settings)
196 return -EOPNOTSUPP;
197
198 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
199 return -EFAULT;
200
201 return dev->ethtool_ops->set_settings(dev, &cmd);
202 }
203
204 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
205 void __user *useraddr)
206 {
207 struct ethtool_drvinfo info;
208 const struct ethtool_ops *ops = dev->ethtool_ops;
209
210 memset(&info, 0, sizeof(info));
211 info.cmd = ETHTOOL_GDRVINFO;
212 if (ops && ops->get_drvinfo) {
213 ops->get_drvinfo(dev, &info);
214 } else if (dev->dev.parent && dev->dev.parent->driver) {
215 strlcpy(info.bus_info, dev_name(dev->dev.parent),
216 sizeof(info.bus_info));
217 strlcpy(info.driver, dev->dev.parent->driver->name,
218 sizeof(info.driver));
219 } else {
220 return -EOPNOTSUPP;
221 }
222
223 /*
224 * this method of obtaining string set info is deprecated;
225 * Use ETHTOOL_GSSET_INFO instead.
226 */
227 if (ops && ops->get_sset_count) {
228 int rc;
229
230 rc = ops->get_sset_count(dev, ETH_SS_TEST);
231 if (rc >= 0)
232 info.testinfo_len = rc;
233 rc = ops->get_sset_count(dev, ETH_SS_STATS);
234 if (rc >= 0)
235 info.n_stats = rc;
236 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
237 if (rc >= 0)
238 info.n_priv_flags = rc;
239 }
240 if (ops && ops->get_regs_len)
241 info.regdump_len = ops->get_regs_len(dev);
242 if (ops && ops->get_eeprom_len)
243 info.eedump_len = ops->get_eeprom_len(dev);
244
245 if (copy_to_user(useraddr, &info, sizeof(info)))
246 return -EFAULT;
247 return 0;
248 }
249
250 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
251 void __user *useraddr)
252 {
253 struct ethtool_sset_info info;
254 const struct ethtool_ops *ops = dev->ethtool_ops;
255 u64 sset_mask;
256 int i, idx = 0, n_bits = 0, ret, rc;
257 u32 *info_buf = NULL;
258
259 if (!ops->get_sset_count)
260 return -EOPNOTSUPP;
261
262 if (copy_from_user(&info, useraddr, sizeof(info)))
263 return -EFAULT;
264
265 /* store copy of mask, because we zero struct later on */
266 sset_mask = info.sset_mask;
267 if (!sset_mask)
268 return 0;
269
270 /* calculate size of return buffer */
271 n_bits = hweight64(sset_mask);
272
273 memset(&info, 0, sizeof(info));
274 info.cmd = ETHTOOL_GSSET_INFO;
275
276 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
277 if (!info_buf)
278 return -ENOMEM;
279
280 /*
281 * fill return buffer based on input bitmask and successful
282 * get_sset_count return
283 */
284 for (i = 0; i < 64; i++) {
285 if (!(sset_mask & (1ULL << i)))
286 continue;
287
288 rc = ops->get_sset_count(dev, i);
289 if (rc >= 0) {
290 info.sset_mask |= (1ULL << i);
291 info_buf[idx++] = rc;
292 }
293 }
294
295 ret = -EFAULT;
296 if (copy_to_user(useraddr, &info, sizeof(info)))
297 goto out;
298
299 useraddr += offsetof(struct ethtool_sset_info, data);
300 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
301 goto out;
302
303 ret = 0;
304
305 out:
306 kfree(info_buf);
307 return ret;
308 }
309
310 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
311 u32 cmd, void __user *useraddr)
312 {
313 struct ethtool_rxnfc info;
314 size_t info_size = sizeof(info);
315
316 if (!dev->ethtool_ops->set_rxnfc)
317 return -EOPNOTSUPP;
318
319 /* struct ethtool_rxnfc was originally defined for
320 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
321 * members. User-space might still be using that
322 * definition. */
323 if (cmd == ETHTOOL_SRXFH)
324 info_size = (offsetof(struct ethtool_rxnfc, data) +
325 sizeof(info.data));
326
327 if (copy_from_user(&info, useraddr, info_size))
328 return -EFAULT;
329
330 return dev->ethtool_ops->set_rxnfc(dev, &info);
331 }
332
333 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
334 u32 cmd, void __user *useraddr)
335 {
336 struct ethtool_rxnfc info;
337 size_t info_size = sizeof(info);
338 const struct ethtool_ops *ops = dev->ethtool_ops;
339 int ret;
340 void *rule_buf = NULL;
341
342 if (!ops->get_rxnfc)
343 return -EOPNOTSUPP;
344
345 /* struct ethtool_rxnfc was originally defined for
346 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
347 * members. User-space might still be using that
348 * definition. */
349 if (cmd == ETHTOOL_GRXFH)
350 info_size = (offsetof(struct ethtool_rxnfc, data) +
351 sizeof(info.data));
352
353 if (copy_from_user(&info, useraddr, info_size))
354 return -EFAULT;
355
356 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
357 if (info.rule_cnt > 0) {
358 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
359 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
360 GFP_USER);
361 if (!rule_buf)
362 return -ENOMEM;
363 }
364 }
365
366 ret = ops->get_rxnfc(dev, &info, rule_buf);
367 if (ret < 0)
368 goto err_out;
369
370 ret = -EFAULT;
371 if (copy_to_user(useraddr, &info, info_size))
372 goto err_out;
373
374 if (rule_buf) {
375 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
376 if (copy_to_user(useraddr, rule_buf,
377 info.rule_cnt * sizeof(u32)))
378 goto err_out;
379 }
380 ret = 0;
381
382 err_out:
383 kfree(rule_buf);
384
385 return ret;
386 }
387
388 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
389 void __user *useraddr)
390 {
391 struct ethtool_rxfh_indir *indir;
392 u32 table_size;
393 size_t full_size;
394 int ret;
395
396 if (!dev->ethtool_ops->get_rxfh_indir)
397 return -EOPNOTSUPP;
398
399 if (copy_from_user(&table_size,
400 useraddr + offsetof(struct ethtool_rxfh_indir, size),
401 sizeof(table_size)))
402 return -EFAULT;
403
404 if (table_size >
405 (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
406 return -ENOMEM;
407 full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
408 indir = kzalloc(full_size, GFP_USER);
409 if (!indir)
410 return -ENOMEM;
411
412 indir->cmd = ETHTOOL_GRXFHINDIR;
413 indir->size = table_size;
414 ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
415 if (ret)
416 goto out;
417
418 if (copy_to_user(useraddr, indir, full_size))
419 ret = -EFAULT;
420
421 out:
422 kfree(indir);
423 return ret;
424 }
425
426 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
427 void __user *useraddr)
428 {
429 struct ethtool_rxfh_indir *indir;
430 u32 table_size;
431 size_t full_size;
432 int ret;
433
434 if (!dev->ethtool_ops->set_rxfh_indir)
435 return -EOPNOTSUPP;
436
437 if (copy_from_user(&table_size,
438 useraddr + offsetof(struct ethtool_rxfh_indir, size),
439 sizeof(table_size)))
440 return -EFAULT;
441
442 if (table_size >
443 (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
444 return -ENOMEM;
445 full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
446 indir = kmalloc(full_size, GFP_USER);
447 if (!indir)
448 return -ENOMEM;
449
450 if (copy_from_user(indir, useraddr, full_size)) {
451 ret = -EFAULT;
452 goto out;
453 }
454
455 ret = dev->ethtool_ops->set_rxfh_indir(dev, indir);
456
457 out:
458 kfree(indir);
459 return ret;
460 }
461
462 static void __rx_ntuple_filter_add(struct ethtool_rx_ntuple_list *list,
463 struct ethtool_rx_ntuple_flow_spec *spec,
464 struct ethtool_rx_ntuple_flow_spec_container *fsc)
465 {
466
467 /* don't add filters forever */
468 if (list->count >= ETHTOOL_MAX_NTUPLE_LIST_ENTRY) {
469 /* free the container */
470 kfree(fsc);
471 return;
472 }
473
474 /* Copy the whole filter over */
475 fsc->fs.flow_type = spec->flow_type;
476 memcpy(&fsc->fs.h_u, &spec->h_u, sizeof(spec->h_u));
477 memcpy(&fsc->fs.m_u, &spec->m_u, sizeof(spec->m_u));
478
479 fsc->fs.vlan_tag = spec->vlan_tag;
480 fsc->fs.vlan_tag_mask = spec->vlan_tag_mask;
481 fsc->fs.data = spec->data;
482 fsc->fs.data_mask = spec->data_mask;
483 fsc->fs.action = spec->action;
484
485 /* add to the list */
486 list_add_tail_rcu(&fsc->list, &list->list);
487 list->count++;
488 }
489
490 /*
491 * ethtool does not (or did not) set masks for flow parameters that are
492 * not specified, so if both value and mask are 0 then this must be
493 * treated as equivalent to a mask with all bits set. Implement that
494 * here rather than in drivers.
495 */
496 static void rx_ntuple_fix_masks(struct ethtool_rx_ntuple_flow_spec *fs)
497 {
498 struct ethtool_tcpip4_spec *entry = &fs->h_u.tcp_ip4_spec;
499 struct ethtool_tcpip4_spec *mask = &fs->m_u.tcp_ip4_spec;
500
501 if (fs->flow_type != TCP_V4_FLOW &&
502 fs->flow_type != UDP_V4_FLOW &&
503 fs->flow_type != SCTP_V4_FLOW)
504 return;
505
506 if (!(entry->ip4src | mask->ip4src))
507 mask->ip4src = htonl(0xffffffff);
508 if (!(entry->ip4dst | mask->ip4dst))
509 mask->ip4dst = htonl(0xffffffff);
510 if (!(entry->psrc | mask->psrc))
511 mask->psrc = htons(0xffff);
512 if (!(entry->pdst | mask->pdst))
513 mask->pdst = htons(0xffff);
514 if (!(entry->tos | mask->tos))
515 mask->tos = 0xff;
516 if (!(fs->vlan_tag | fs->vlan_tag_mask))
517 fs->vlan_tag_mask = 0xffff;
518 if (!(fs->data | fs->data_mask))
519 fs->data_mask = 0xffffffffffffffffULL;
520 }
521
522 static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev,
523 void __user *useraddr)
524 {
525 struct ethtool_rx_ntuple cmd;
526 const struct ethtool_ops *ops = dev->ethtool_ops;
527 struct ethtool_rx_ntuple_flow_spec_container *fsc = NULL;
528 int ret;
529
530 if (!(dev->features & NETIF_F_NTUPLE))
531 return -EINVAL;
532
533 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
534 return -EFAULT;
535
536 rx_ntuple_fix_masks(&cmd.fs);
537
538 /*
539 * Cache filter in dev struct for GET operation only if
540 * the underlying driver doesn't have its own GET operation, and
541 * only if the filter was added successfully. First make sure we
542 * can allocate the filter, then continue if successful.
543 */
544 if (!ops->get_rx_ntuple) {
545 fsc = kmalloc(sizeof(*fsc), GFP_ATOMIC);
546 if (!fsc)
547 return -ENOMEM;
548 }
549
550 ret = ops->set_rx_ntuple(dev, &cmd);
551 if (ret) {
552 kfree(fsc);
553 return ret;
554 }
555
556 if (!ops->get_rx_ntuple)
557 __rx_ntuple_filter_add(&dev->ethtool_ntuple_list, &cmd.fs, fsc);
558
559 return ret;
560 }
561
562 static int ethtool_get_rx_ntuple(struct net_device *dev, void __user *useraddr)
563 {
564 struct ethtool_gstrings gstrings;
565 const struct ethtool_ops *ops = dev->ethtool_ops;
566 struct ethtool_rx_ntuple_flow_spec_container *fsc;
567 u8 *data;
568 char *p;
569 int ret, i, num_strings = 0;
570
571 if (!ops->get_sset_count)
572 return -EOPNOTSUPP;
573
574 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
575 return -EFAULT;
576
577 ret = ops->get_sset_count(dev, gstrings.string_set);
578 if (ret < 0)
579 return ret;
580
581 gstrings.len = ret;
582
583 data = kzalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
584 if (!data)
585 return -ENOMEM;
586
587 if (ops->get_rx_ntuple) {
588 /* driver-specific filter grab */
589 ret = ops->get_rx_ntuple(dev, gstrings.string_set, data);
590 goto copy;
591 }
592
593 /* default ethtool filter grab */
594 i = 0;
595 p = (char *)data;
596 list_for_each_entry(fsc, &dev->ethtool_ntuple_list.list, list) {
597 sprintf(p, "Filter %d:\n", i);
598 p += ETH_GSTRING_LEN;
599 num_strings++;
600
601 switch (fsc->fs.flow_type) {
602 case TCP_V4_FLOW:
603 sprintf(p, "\tFlow Type: TCP\n");
604 p += ETH_GSTRING_LEN;
605 num_strings++;
606 break;
607 case UDP_V4_FLOW:
608 sprintf(p, "\tFlow Type: UDP\n");
609 p += ETH_GSTRING_LEN;
610 num_strings++;
611 break;
612 case SCTP_V4_FLOW:
613 sprintf(p, "\tFlow Type: SCTP\n");
614 p += ETH_GSTRING_LEN;
615 num_strings++;
616 break;
617 case AH_ESP_V4_FLOW:
618 sprintf(p, "\tFlow Type: AH ESP\n");
619 p += ETH_GSTRING_LEN;
620 num_strings++;
621 break;
622 case ESP_V4_FLOW:
623 sprintf(p, "\tFlow Type: ESP\n");
624 p += ETH_GSTRING_LEN;
625 num_strings++;
626 break;
627 case IP_USER_FLOW:
628 sprintf(p, "\tFlow Type: Raw IP\n");
629 p += ETH_GSTRING_LEN;
630 num_strings++;
631 break;
632 case IPV4_FLOW:
633 sprintf(p, "\tFlow Type: IPv4\n");
634 p += ETH_GSTRING_LEN;
635 num_strings++;
636 break;
637 default:
638 sprintf(p, "\tFlow Type: Unknown\n");
639 p += ETH_GSTRING_LEN;
640 num_strings++;
641 goto unknown_filter;
642 }
643
644 /* now the rest of the filters */
645 switch (fsc->fs.flow_type) {
646 case TCP_V4_FLOW:
647 case UDP_V4_FLOW:
648 case SCTP_V4_FLOW:
649 sprintf(p, "\tSrc IP addr: 0x%x\n",
650 fsc->fs.h_u.tcp_ip4_spec.ip4src);
651 p += ETH_GSTRING_LEN;
652 num_strings++;
653 sprintf(p, "\tSrc IP mask: 0x%x\n",
654 fsc->fs.m_u.tcp_ip4_spec.ip4src);
655 p += ETH_GSTRING_LEN;
656 num_strings++;
657 sprintf(p, "\tDest IP addr: 0x%x\n",
658 fsc->fs.h_u.tcp_ip4_spec.ip4dst);
659 p += ETH_GSTRING_LEN;
660 num_strings++;
661 sprintf(p, "\tDest IP mask: 0x%x\n",
662 fsc->fs.m_u.tcp_ip4_spec.ip4dst);
663 p += ETH_GSTRING_LEN;
664 num_strings++;
665 sprintf(p, "\tSrc Port: %d, mask: 0x%x\n",
666 fsc->fs.h_u.tcp_ip4_spec.psrc,
667 fsc->fs.m_u.tcp_ip4_spec.psrc);
668 p += ETH_GSTRING_LEN;
669 num_strings++;
670 sprintf(p, "\tDest Port: %d, mask: 0x%x\n",
671 fsc->fs.h_u.tcp_ip4_spec.pdst,
672 fsc->fs.m_u.tcp_ip4_spec.pdst);
673 p += ETH_GSTRING_LEN;
674 num_strings++;
675 sprintf(p, "\tTOS: %d, mask: 0x%x\n",
676 fsc->fs.h_u.tcp_ip4_spec.tos,
677 fsc->fs.m_u.tcp_ip4_spec.tos);
678 p += ETH_GSTRING_LEN;
679 num_strings++;
680 break;
681 case AH_ESP_V4_FLOW:
682 case ESP_V4_FLOW:
683 sprintf(p, "\tSrc IP addr: 0x%x\n",
684 fsc->fs.h_u.ah_ip4_spec.ip4src);
685 p += ETH_GSTRING_LEN;
686 num_strings++;
687 sprintf(p, "\tSrc IP mask: 0x%x\n",
688 fsc->fs.m_u.ah_ip4_spec.ip4src);
689 p += ETH_GSTRING_LEN;
690 num_strings++;
691 sprintf(p, "\tDest IP addr: 0x%x\n",
692 fsc->fs.h_u.ah_ip4_spec.ip4dst);
693 p += ETH_GSTRING_LEN;
694 num_strings++;
695 sprintf(p, "\tDest IP mask: 0x%x\n",
696 fsc->fs.m_u.ah_ip4_spec.ip4dst);
697 p += ETH_GSTRING_LEN;
698 num_strings++;
699 sprintf(p, "\tSPI: %d, mask: 0x%x\n",
700 fsc->fs.h_u.ah_ip4_spec.spi,
701 fsc->fs.m_u.ah_ip4_spec.spi);
702 p += ETH_GSTRING_LEN;
703 num_strings++;
704 sprintf(p, "\tTOS: %d, mask: 0x%x\n",
705 fsc->fs.h_u.ah_ip4_spec.tos,
706 fsc->fs.m_u.ah_ip4_spec.tos);
707 p += ETH_GSTRING_LEN;
708 num_strings++;
709 break;
710 case IP_USER_FLOW:
711 sprintf(p, "\tSrc IP addr: 0x%x\n",
712 fsc->fs.h_u.usr_ip4_spec.ip4src);
713 p += ETH_GSTRING_LEN;
714 num_strings++;
715 sprintf(p, "\tSrc IP mask: 0x%x\n",
716 fsc->fs.m_u.usr_ip4_spec.ip4src);
717 p += ETH_GSTRING_LEN;
718 num_strings++;
719 sprintf(p, "\tDest IP addr: 0x%x\n",
720 fsc->fs.h_u.usr_ip4_spec.ip4dst);
721 p += ETH_GSTRING_LEN;
722 num_strings++;
723 sprintf(p, "\tDest IP mask: 0x%x\n",
724 fsc->fs.m_u.usr_ip4_spec.ip4dst);
725 p += ETH_GSTRING_LEN;
726 num_strings++;
727 break;
728 case IPV4_FLOW:
729 sprintf(p, "\tSrc IP addr: 0x%x\n",
730 fsc->fs.h_u.usr_ip4_spec.ip4src);
731 p += ETH_GSTRING_LEN;
732 num_strings++;
733 sprintf(p, "\tSrc IP mask: 0x%x\n",
734 fsc->fs.m_u.usr_ip4_spec.ip4src);
735 p += ETH_GSTRING_LEN;
736 num_strings++;
737 sprintf(p, "\tDest IP addr: 0x%x\n",
738 fsc->fs.h_u.usr_ip4_spec.ip4dst);
739 p += ETH_GSTRING_LEN;
740 num_strings++;
741 sprintf(p, "\tDest IP mask: 0x%x\n",
742 fsc->fs.m_u.usr_ip4_spec.ip4dst);
743 p += ETH_GSTRING_LEN;
744 num_strings++;
745 sprintf(p, "\tL4 bytes: 0x%x, mask: 0x%x\n",
746 fsc->fs.h_u.usr_ip4_spec.l4_4_bytes,
747 fsc->fs.m_u.usr_ip4_spec.l4_4_bytes);
748 p += ETH_GSTRING_LEN;
749 num_strings++;
750 sprintf(p, "\tTOS: %d, mask: 0x%x\n",
751 fsc->fs.h_u.usr_ip4_spec.tos,
752 fsc->fs.m_u.usr_ip4_spec.tos);
753 p += ETH_GSTRING_LEN;
754 num_strings++;
755 sprintf(p, "\tIP Version: %d, mask: 0x%x\n",
756 fsc->fs.h_u.usr_ip4_spec.ip_ver,
757 fsc->fs.m_u.usr_ip4_spec.ip_ver);
758 p += ETH_GSTRING_LEN;
759 num_strings++;
760 sprintf(p, "\tProtocol: %d, mask: 0x%x\n",
761 fsc->fs.h_u.usr_ip4_spec.proto,
762 fsc->fs.m_u.usr_ip4_spec.proto);
763 p += ETH_GSTRING_LEN;
764 num_strings++;
765 break;
766 }
767 sprintf(p, "\tVLAN: %d, mask: 0x%x\n",
768 fsc->fs.vlan_tag, fsc->fs.vlan_tag_mask);
769 p += ETH_GSTRING_LEN;
770 num_strings++;
771 sprintf(p, "\tUser-defined: 0x%Lx\n", fsc->fs.data);
772 p += ETH_GSTRING_LEN;
773 num_strings++;
774 sprintf(p, "\tUser-defined mask: 0x%Lx\n", fsc->fs.data_mask);
775 p += ETH_GSTRING_LEN;
776 num_strings++;
777 if (fsc->fs.action == ETHTOOL_RXNTUPLE_ACTION_DROP)
778 sprintf(p, "\tAction: Drop\n");
779 else
780 sprintf(p, "\tAction: Direct to queue %d\n",
781 fsc->fs.action);
782 p += ETH_GSTRING_LEN;
783 num_strings++;
784 unknown_filter:
785 i++;
786 }
787 copy:
788 /* indicate to userspace how many strings we actually have */
789 gstrings.len = num_strings;
790 ret = -EFAULT;
791 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
792 goto out;
793 useraddr += sizeof(gstrings);
794 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
795 goto out;
796 ret = 0;
797
798 out:
799 kfree(data);
800 return ret;
801 }
802
803 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
804 {
805 struct ethtool_regs regs;
806 const struct ethtool_ops *ops = dev->ethtool_ops;
807 void *regbuf;
808 int reglen, ret;
809
810 if (!ops->get_regs || !ops->get_regs_len)
811 return -EOPNOTSUPP;
812
813 if (copy_from_user(&regs, useraddr, sizeof(regs)))
814 return -EFAULT;
815
816 reglen = ops->get_regs_len(dev);
817 if (regs.len > reglen)
818 regs.len = reglen;
819
820 regbuf = vmalloc(reglen);
821 if (!regbuf)
822 return -ENOMEM;
823
824 ops->get_regs(dev, &regs, regbuf);
825
826 ret = -EFAULT;
827 if (copy_to_user(useraddr, &regs, sizeof(regs)))
828 goto out;
829 useraddr += offsetof(struct ethtool_regs, data);
830 if (copy_to_user(useraddr, regbuf, regs.len))
831 goto out;
832 ret = 0;
833
834 out:
835 vfree(regbuf);
836 return ret;
837 }
838
839 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
840 {
841 struct ethtool_value reset;
842 int ret;
843
844 if (!dev->ethtool_ops->reset)
845 return -EOPNOTSUPP;
846
847 if (copy_from_user(&reset, useraddr, sizeof(reset)))
848 return -EFAULT;
849
850 ret = dev->ethtool_ops->reset(dev, &reset.data);
851 if (ret)
852 return ret;
853
854 if (copy_to_user(useraddr, &reset, sizeof(reset)))
855 return -EFAULT;
856 return 0;
857 }
858
859 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
860 {
861 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
862
863 if (!dev->ethtool_ops->get_wol)
864 return -EOPNOTSUPP;
865
866 dev->ethtool_ops->get_wol(dev, &wol);
867
868 if (copy_to_user(useraddr, &wol, sizeof(wol)))
869 return -EFAULT;
870 return 0;
871 }
872
873 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
874 {
875 struct ethtool_wolinfo wol;
876
877 if (!dev->ethtool_ops->set_wol)
878 return -EOPNOTSUPP;
879
880 if (copy_from_user(&wol, useraddr, sizeof(wol)))
881 return -EFAULT;
882
883 return dev->ethtool_ops->set_wol(dev, &wol);
884 }
885
886 static int ethtool_nway_reset(struct net_device *dev)
887 {
888 if (!dev->ethtool_ops->nway_reset)
889 return -EOPNOTSUPP;
890
891 return dev->ethtool_ops->nway_reset(dev);
892 }
893
894 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
895 {
896 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
897
898 if (!dev->ethtool_ops->get_link)
899 return -EOPNOTSUPP;
900
901 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
902
903 if (copy_to_user(useraddr, &edata, sizeof(edata)))
904 return -EFAULT;
905 return 0;
906 }
907
908 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
909 {
910 struct ethtool_eeprom eeprom;
911 const struct ethtool_ops *ops = dev->ethtool_ops;
912 void __user *userbuf = useraddr + sizeof(eeprom);
913 u32 bytes_remaining;
914 u8 *data;
915 int ret = 0;
916
917 if (!ops->get_eeprom || !ops->get_eeprom_len)
918 return -EOPNOTSUPP;
919
920 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
921 return -EFAULT;
922
923 /* Check for wrap and zero */
924 if (eeprom.offset + eeprom.len <= eeprom.offset)
925 return -EINVAL;
926
927 /* Check for exceeding total eeprom len */
928 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
929 return -EINVAL;
930
931 data = kmalloc(PAGE_SIZE, GFP_USER);
932 if (!data)
933 return -ENOMEM;
934
935 bytes_remaining = eeprom.len;
936 while (bytes_remaining > 0) {
937 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
938
939 ret = ops->get_eeprom(dev, &eeprom, data);
940 if (ret)
941 break;
942 if (copy_to_user(userbuf, data, eeprom.len)) {
943 ret = -EFAULT;
944 break;
945 }
946 userbuf += eeprom.len;
947 eeprom.offset += eeprom.len;
948 bytes_remaining -= eeprom.len;
949 }
950
951 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
952 eeprom.offset -= eeprom.len;
953 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
954 ret = -EFAULT;
955
956 kfree(data);
957 return ret;
958 }
959
960 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
961 {
962 struct ethtool_eeprom eeprom;
963 const struct ethtool_ops *ops = dev->ethtool_ops;
964 void __user *userbuf = useraddr + sizeof(eeprom);
965 u32 bytes_remaining;
966 u8 *data;
967 int ret = 0;
968
969 if (!ops->set_eeprom || !ops->get_eeprom_len)
970 return -EOPNOTSUPP;
971
972 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
973 return -EFAULT;
974
975 /* Check for wrap and zero */
976 if (eeprom.offset + eeprom.len <= eeprom.offset)
977 return -EINVAL;
978
979 /* Check for exceeding total eeprom len */
980 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
981 return -EINVAL;
982
983 data = kmalloc(PAGE_SIZE, GFP_USER);
984 if (!data)
985 return -ENOMEM;
986
987 bytes_remaining = eeprom.len;
988 while (bytes_remaining > 0) {
989 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
990
991 if (copy_from_user(data, userbuf, eeprom.len)) {
992 ret = -EFAULT;
993 break;
994 }
995 ret = ops->set_eeprom(dev, &eeprom, data);
996 if (ret)
997 break;
998 userbuf += eeprom.len;
999 eeprom.offset += eeprom.len;
1000 bytes_remaining -= eeprom.len;
1001 }
1002
1003 kfree(data);
1004 return ret;
1005 }
1006
1007 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1008 void __user *useraddr)
1009 {
1010 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1011
1012 if (!dev->ethtool_ops->get_coalesce)
1013 return -EOPNOTSUPP;
1014
1015 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1016
1017 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1018 return -EFAULT;
1019 return 0;
1020 }
1021
1022 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1023 void __user *useraddr)
1024 {
1025 struct ethtool_coalesce coalesce;
1026
1027 if (!dev->ethtool_ops->set_coalesce)
1028 return -EOPNOTSUPP;
1029
1030 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1031 return -EFAULT;
1032
1033 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1034 }
1035
1036 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1037 {
1038 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1039
1040 if (!dev->ethtool_ops->get_ringparam)
1041 return -EOPNOTSUPP;
1042
1043 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1044
1045 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1046 return -EFAULT;
1047 return 0;
1048 }
1049
1050 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1051 {
1052 struct ethtool_ringparam ringparam;
1053
1054 if (!dev->ethtool_ops->set_ringparam)
1055 return -EOPNOTSUPP;
1056
1057 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1058 return -EFAULT;
1059
1060 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1061 }
1062
1063 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1064 {
1065 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1066
1067 if (!dev->ethtool_ops->get_pauseparam)
1068 return -EOPNOTSUPP;
1069
1070 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1071
1072 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1073 return -EFAULT;
1074 return 0;
1075 }
1076
1077 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1078 {
1079 struct ethtool_pauseparam pauseparam;
1080
1081 if (!dev->ethtool_ops->set_pauseparam)
1082 return -EOPNOTSUPP;
1083
1084 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1085 return -EFAULT;
1086
1087 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1088 }
1089
1090 static int __ethtool_set_sg(struct net_device *dev, u32 data)
1091 {
1092 int err;
1093
1094 if (!data && dev->ethtool_ops->set_tso) {
1095 err = dev->ethtool_ops->set_tso(dev, 0);
1096 if (err)
1097 return err;
1098 }
1099
1100 if (!data && dev->ethtool_ops->set_ufo) {
1101 err = dev->ethtool_ops->set_ufo(dev, 0);
1102 if (err)
1103 return err;
1104 }
1105 return dev->ethtool_ops->set_sg(dev, data);
1106 }
1107
1108 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
1109 {
1110 struct ethtool_value edata;
1111 int err;
1112
1113 if (!dev->ethtool_ops->set_tx_csum)
1114 return -EOPNOTSUPP;
1115
1116 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1117 return -EFAULT;
1118
1119 if (!edata.data && dev->ethtool_ops->set_sg) {
1120 err = __ethtool_set_sg(dev, 0);
1121 if (err)
1122 return err;
1123 }
1124
1125 return dev->ethtool_ops->set_tx_csum(dev, edata.data);
1126 }
1127 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
1128
1129 static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
1130 {
1131 struct ethtool_value edata;
1132
1133 if (!dev->ethtool_ops->set_rx_csum)
1134 return -EOPNOTSUPP;
1135
1136 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1137 return -EFAULT;
1138
1139 if (!edata.data && dev->ethtool_ops->set_sg)
1140 dev->features &= ~NETIF_F_GRO;
1141
1142 return dev->ethtool_ops->set_rx_csum(dev, edata.data);
1143 }
1144
1145 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
1146 {
1147 struct ethtool_value edata;
1148
1149 if (!dev->ethtool_ops->set_sg)
1150 return -EOPNOTSUPP;
1151
1152 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1153 return -EFAULT;
1154
1155 if (edata.data &&
1156 !(dev->features & NETIF_F_ALL_CSUM))
1157 return -EINVAL;
1158
1159 return __ethtool_set_sg(dev, edata.data);
1160 }
1161
1162 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
1163 {
1164 struct ethtool_value edata;
1165
1166 if (!dev->ethtool_ops->set_tso)
1167 return -EOPNOTSUPP;
1168
1169 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1170 return -EFAULT;
1171
1172 if (edata.data && !(dev->features & NETIF_F_SG))
1173 return -EINVAL;
1174
1175 return dev->ethtool_ops->set_tso(dev, edata.data);
1176 }
1177
1178 static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
1179 {
1180 struct ethtool_value edata;
1181
1182 if (!dev->ethtool_ops->set_ufo)
1183 return -EOPNOTSUPP;
1184 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1185 return -EFAULT;
1186 if (edata.data && !(dev->features & NETIF_F_SG))
1187 return -EINVAL;
1188 if (edata.data && !((dev->features & NETIF_F_GEN_CSUM) ||
1189 (dev->features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
1190 == (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)))
1191 return -EINVAL;
1192 return dev->ethtool_ops->set_ufo(dev, edata.data);
1193 }
1194
1195 static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
1196 {
1197 struct ethtool_value edata = { ETHTOOL_GGSO };
1198
1199 edata.data = dev->features & NETIF_F_GSO;
1200 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1201 return -EFAULT;
1202 return 0;
1203 }
1204
1205 static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
1206 {
1207 struct ethtool_value edata;
1208
1209 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1210 return -EFAULT;
1211 if (edata.data)
1212 dev->features |= NETIF_F_GSO;
1213 else
1214 dev->features &= ~NETIF_F_GSO;
1215 return 0;
1216 }
1217
1218 static int ethtool_get_gro(struct net_device *dev, char __user *useraddr)
1219 {
1220 struct ethtool_value edata = { ETHTOOL_GGRO };
1221
1222 edata.data = dev->features & NETIF_F_GRO;
1223 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1224 return -EFAULT;
1225 return 0;
1226 }
1227
1228 static int ethtool_set_gro(struct net_device *dev, char __user *useraddr)
1229 {
1230 struct ethtool_value edata;
1231
1232 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1233 return -EFAULT;
1234
1235 if (edata.data) {
1236 u32 rxcsum = dev->ethtool_ops->get_rx_csum ?
1237 dev->ethtool_ops->get_rx_csum(dev) :
1238 ethtool_op_get_rx_csum(dev);
1239
1240 if (!rxcsum)
1241 return -EINVAL;
1242 dev->features |= NETIF_F_GRO;
1243 } else
1244 dev->features &= ~NETIF_F_GRO;
1245
1246 return 0;
1247 }
1248
1249 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1250 {
1251 struct ethtool_test test;
1252 const struct ethtool_ops *ops = dev->ethtool_ops;
1253 u64 *data;
1254 int ret, test_len;
1255
1256 if (!ops->self_test || !ops->get_sset_count)
1257 return -EOPNOTSUPP;
1258
1259 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1260 if (test_len < 0)
1261 return test_len;
1262 WARN_ON(test_len == 0);
1263
1264 if (copy_from_user(&test, useraddr, sizeof(test)))
1265 return -EFAULT;
1266
1267 test.len = test_len;
1268 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1269 if (!data)
1270 return -ENOMEM;
1271
1272 ops->self_test(dev, &test, data);
1273
1274 ret = -EFAULT;
1275 if (copy_to_user(useraddr, &test, sizeof(test)))
1276 goto out;
1277 useraddr += sizeof(test);
1278 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1279 goto out;
1280 ret = 0;
1281
1282 out:
1283 kfree(data);
1284 return ret;
1285 }
1286
1287 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1288 {
1289 struct ethtool_gstrings gstrings;
1290 const struct ethtool_ops *ops = dev->ethtool_ops;
1291 u8 *data;
1292 int ret;
1293
1294 if (!ops->get_strings || !ops->get_sset_count)
1295 return -EOPNOTSUPP;
1296
1297 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1298 return -EFAULT;
1299
1300 ret = ops->get_sset_count(dev, gstrings.string_set);
1301 if (ret < 0)
1302 return ret;
1303
1304 gstrings.len = ret;
1305
1306 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1307 if (!data)
1308 return -ENOMEM;
1309
1310 ops->get_strings(dev, gstrings.string_set, data);
1311
1312 ret = -EFAULT;
1313 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1314 goto out;
1315 useraddr += sizeof(gstrings);
1316 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1317 goto out;
1318 ret = 0;
1319
1320 out:
1321 kfree(data);
1322 return ret;
1323 }
1324
1325 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1326 {
1327 struct ethtool_value id;
1328
1329 if (!dev->ethtool_ops->phys_id)
1330 return -EOPNOTSUPP;
1331
1332 if (copy_from_user(&id, useraddr, sizeof(id)))
1333 return -EFAULT;
1334
1335 return dev->ethtool_ops->phys_id(dev, id.data);
1336 }
1337
1338 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1339 {
1340 struct ethtool_stats stats;
1341 const struct ethtool_ops *ops = dev->ethtool_ops;
1342 u64 *data;
1343 int ret, n_stats;
1344
1345 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1346 return -EOPNOTSUPP;
1347
1348 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1349 if (n_stats < 0)
1350 return n_stats;
1351 WARN_ON(n_stats == 0);
1352
1353 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1354 return -EFAULT;
1355
1356 stats.n_stats = n_stats;
1357 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1358 if (!data)
1359 return -ENOMEM;
1360
1361 ops->get_ethtool_stats(dev, &stats, data);
1362
1363 ret = -EFAULT;
1364 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1365 goto out;
1366 useraddr += sizeof(stats);
1367 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1368 goto out;
1369 ret = 0;
1370
1371 out:
1372 kfree(data);
1373 return ret;
1374 }
1375
1376 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1377 {
1378 struct ethtool_perm_addr epaddr;
1379
1380 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1381 return -EFAULT;
1382
1383 if (epaddr.size < dev->addr_len)
1384 return -ETOOSMALL;
1385 epaddr.size = dev->addr_len;
1386
1387 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1388 return -EFAULT;
1389 useraddr += sizeof(epaddr);
1390 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1391 return -EFAULT;
1392 return 0;
1393 }
1394
1395 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1396 u32 cmd, u32 (*actor)(struct net_device *))
1397 {
1398 struct ethtool_value edata = { .cmd = cmd };
1399
1400 if (!actor)
1401 return -EOPNOTSUPP;
1402
1403 edata.data = actor(dev);
1404
1405 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1406 return -EFAULT;
1407 return 0;
1408 }
1409
1410 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1411 void (*actor)(struct net_device *, u32))
1412 {
1413 struct ethtool_value edata;
1414
1415 if (!actor)
1416 return -EOPNOTSUPP;
1417
1418 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1419 return -EFAULT;
1420
1421 actor(dev, edata.data);
1422 return 0;
1423 }
1424
1425 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1426 int (*actor)(struct net_device *, u32))
1427 {
1428 struct ethtool_value edata;
1429
1430 if (!actor)
1431 return -EOPNOTSUPP;
1432
1433 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1434 return -EFAULT;
1435
1436 return actor(dev, edata.data);
1437 }
1438
1439 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1440 char __user *useraddr)
1441 {
1442 struct ethtool_flash efl;
1443
1444 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1445 return -EFAULT;
1446
1447 if (!dev->ethtool_ops->flash_device)
1448 return -EOPNOTSUPP;
1449
1450 return dev->ethtool_ops->flash_device(dev, &efl);
1451 }
1452
1453 /* The main entry point in this file. Called from net/core/dev.c */
1454
1455 int dev_ethtool(struct net *net, struct ifreq *ifr)
1456 {
1457 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1458 void __user *useraddr = ifr->ifr_data;
1459 u32 ethcmd;
1460 int rc;
1461 unsigned long old_features;
1462
1463 if (!dev || !netif_device_present(dev))
1464 return -ENODEV;
1465
1466 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1467 return -EFAULT;
1468
1469 if (!dev->ethtool_ops) {
1470 /* ETHTOOL_GDRVINFO does not require any driver support.
1471 * It is also unprivileged and does not change anything,
1472 * so we can take a shortcut to it. */
1473 if (ethcmd == ETHTOOL_GDRVINFO)
1474 return ethtool_get_drvinfo(dev, useraddr);
1475 else
1476 return -EOPNOTSUPP;
1477 }
1478
1479 /* Allow some commands to be done by anyone */
1480 switch (ethcmd) {
1481 case ETHTOOL_GSET:
1482 case ETHTOOL_GDRVINFO:
1483 case ETHTOOL_GMSGLVL:
1484 case ETHTOOL_GCOALESCE:
1485 case ETHTOOL_GRINGPARAM:
1486 case ETHTOOL_GPAUSEPARAM:
1487 case ETHTOOL_GRXCSUM:
1488 case ETHTOOL_GTXCSUM:
1489 case ETHTOOL_GSG:
1490 case ETHTOOL_GSTRINGS:
1491 case ETHTOOL_GTSO:
1492 case ETHTOOL_GPERMADDR:
1493 case ETHTOOL_GUFO:
1494 case ETHTOOL_GGSO:
1495 case ETHTOOL_GGRO:
1496 case ETHTOOL_GFLAGS:
1497 case ETHTOOL_GPFLAGS:
1498 case ETHTOOL_GRXFH:
1499 case ETHTOOL_GRXRINGS:
1500 case ETHTOOL_GRXCLSRLCNT:
1501 case ETHTOOL_GRXCLSRULE:
1502 case ETHTOOL_GRXCLSRLALL:
1503 break;
1504 default:
1505 if (!capable(CAP_NET_ADMIN))
1506 return -EPERM;
1507 }
1508
1509 if (dev->ethtool_ops->begin) {
1510 rc = dev->ethtool_ops->begin(dev);
1511 if (rc < 0)
1512 return rc;
1513 }
1514 old_features = dev->features;
1515
1516 switch (ethcmd) {
1517 case ETHTOOL_GSET:
1518 rc = ethtool_get_settings(dev, useraddr);
1519 break;
1520 case ETHTOOL_SSET:
1521 rc = ethtool_set_settings(dev, useraddr);
1522 break;
1523 case ETHTOOL_GDRVINFO:
1524 rc = ethtool_get_drvinfo(dev, useraddr);
1525 break;
1526 case ETHTOOL_GREGS:
1527 rc = ethtool_get_regs(dev, useraddr);
1528 break;
1529 case ETHTOOL_GWOL:
1530 rc = ethtool_get_wol(dev, useraddr);
1531 break;
1532 case ETHTOOL_SWOL:
1533 rc = ethtool_set_wol(dev, useraddr);
1534 break;
1535 case ETHTOOL_GMSGLVL:
1536 rc = ethtool_get_value(dev, useraddr, ethcmd,
1537 dev->ethtool_ops->get_msglevel);
1538 break;
1539 case ETHTOOL_SMSGLVL:
1540 rc = ethtool_set_value_void(dev, useraddr,
1541 dev->ethtool_ops->set_msglevel);
1542 break;
1543 case ETHTOOL_NWAY_RST:
1544 rc = ethtool_nway_reset(dev);
1545 break;
1546 case ETHTOOL_GLINK:
1547 rc = ethtool_get_link(dev, useraddr);
1548 break;
1549 case ETHTOOL_GEEPROM:
1550 rc = ethtool_get_eeprom(dev, useraddr);
1551 break;
1552 case ETHTOOL_SEEPROM:
1553 rc = ethtool_set_eeprom(dev, useraddr);
1554 break;
1555 case ETHTOOL_GCOALESCE:
1556 rc = ethtool_get_coalesce(dev, useraddr);
1557 break;
1558 case ETHTOOL_SCOALESCE:
1559 rc = ethtool_set_coalesce(dev, useraddr);
1560 break;
1561 case ETHTOOL_GRINGPARAM:
1562 rc = ethtool_get_ringparam(dev, useraddr);
1563 break;
1564 case ETHTOOL_SRINGPARAM:
1565 rc = ethtool_set_ringparam(dev, useraddr);
1566 break;
1567 case ETHTOOL_GPAUSEPARAM:
1568 rc = ethtool_get_pauseparam(dev, useraddr);
1569 break;
1570 case ETHTOOL_SPAUSEPARAM:
1571 rc = ethtool_set_pauseparam(dev, useraddr);
1572 break;
1573 case ETHTOOL_GRXCSUM:
1574 rc = ethtool_get_value(dev, useraddr, ethcmd,
1575 (dev->ethtool_ops->get_rx_csum ?
1576 dev->ethtool_ops->get_rx_csum :
1577 ethtool_op_get_rx_csum));
1578 break;
1579 case ETHTOOL_SRXCSUM:
1580 rc = ethtool_set_rx_csum(dev, useraddr);
1581 break;
1582 case ETHTOOL_GTXCSUM:
1583 rc = ethtool_get_value(dev, useraddr, ethcmd,
1584 (dev->ethtool_ops->get_tx_csum ?
1585 dev->ethtool_ops->get_tx_csum :
1586 ethtool_op_get_tx_csum));
1587 break;
1588 case ETHTOOL_STXCSUM:
1589 rc = ethtool_set_tx_csum(dev, useraddr);
1590 break;
1591 case ETHTOOL_GSG:
1592 rc = ethtool_get_value(dev, useraddr, ethcmd,
1593 (dev->ethtool_ops->get_sg ?
1594 dev->ethtool_ops->get_sg :
1595 ethtool_op_get_sg));
1596 break;
1597 case ETHTOOL_SSG:
1598 rc = ethtool_set_sg(dev, useraddr);
1599 break;
1600 case ETHTOOL_GTSO:
1601 rc = ethtool_get_value(dev, useraddr, ethcmd,
1602 (dev->ethtool_ops->get_tso ?
1603 dev->ethtool_ops->get_tso :
1604 ethtool_op_get_tso));
1605 break;
1606 case ETHTOOL_STSO:
1607 rc = ethtool_set_tso(dev, useraddr);
1608 break;
1609 case ETHTOOL_TEST:
1610 rc = ethtool_self_test(dev, useraddr);
1611 break;
1612 case ETHTOOL_GSTRINGS:
1613 rc = ethtool_get_strings(dev, useraddr);
1614 break;
1615 case ETHTOOL_PHYS_ID:
1616 rc = ethtool_phys_id(dev, useraddr);
1617 break;
1618 case ETHTOOL_GSTATS:
1619 rc = ethtool_get_stats(dev, useraddr);
1620 break;
1621 case ETHTOOL_GPERMADDR:
1622 rc = ethtool_get_perm_addr(dev, useraddr);
1623 break;
1624 case ETHTOOL_GUFO:
1625 rc = ethtool_get_value(dev, useraddr, ethcmd,
1626 (dev->ethtool_ops->get_ufo ?
1627 dev->ethtool_ops->get_ufo :
1628 ethtool_op_get_ufo));
1629 break;
1630 case ETHTOOL_SUFO:
1631 rc = ethtool_set_ufo(dev, useraddr);
1632 break;
1633 case ETHTOOL_GGSO:
1634 rc = ethtool_get_gso(dev, useraddr);
1635 break;
1636 case ETHTOOL_SGSO:
1637 rc = ethtool_set_gso(dev, useraddr);
1638 break;
1639 case ETHTOOL_GFLAGS:
1640 rc = ethtool_get_value(dev, useraddr, ethcmd,
1641 (dev->ethtool_ops->get_flags ?
1642 dev->ethtool_ops->get_flags :
1643 ethtool_op_get_flags));
1644 break;
1645 case ETHTOOL_SFLAGS:
1646 rc = ethtool_set_value(dev, useraddr,
1647 dev->ethtool_ops->set_flags);
1648 break;
1649 case ETHTOOL_GPFLAGS:
1650 rc = ethtool_get_value(dev, useraddr, ethcmd,
1651 dev->ethtool_ops->get_priv_flags);
1652 break;
1653 case ETHTOOL_SPFLAGS:
1654 rc = ethtool_set_value(dev, useraddr,
1655 dev->ethtool_ops->set_priv_flags);
1656 break;
1657 case ETHTOOL_GRXFH:
1658 case ETHTOOL_GRXRINGS:
1659 case ETHTOOL_GRXCLSRLCNT:
1660 case ETHTOOL_GRXCLSRULE:
1661 case ETHTOOL_GRXCLSRLALL:
1662 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1663 break;
1664 case ETHTOOL_SRXFH:
1665 case ETHTOOL_SRXCLSRLDEL:
1666 case ETHTOOL_SRXCLSRLINS:
1667 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1668 break;
1669 case ETHTOOL_GGRO:
1670 rc = ethtool_get_gro(dev, useraddr);
1671 break;
1672 case ETHTOOL_SGRO:
1673 rc = ethtool_set_gro(dev, useraddr);
1674 break;
1675 case ETHTOOL_FLASHDEV:
1676 rc = ethtool_flash_device(dev, useraddr);
1677 break;
1678 case ETHTOOL_RESET:
1679 rc = ethtool_reset(dev, useraddr);
1680 break;
1681 case ETHTOOL_SRXNTUPLE:
1682 rc = ethtool_set_rx_ntuple(dev, useraddr);
1683 break;
1684 case ETHTOOL_GRXNTUPLE:
1685 rc = ethtool_get_rx_ntuple(dev, useraddr);
1686 break;
1687 case ETHTOOL_GSSET_INFO:
1688 rc = ethtool_get_sset_info(dev, useraddr);
1689 break;
1690 case ETHTOOL_GRXFHINDIR:
1691 rc = ethtool_get_rxfh_indir(dev, useraddr);
1692 break;
1693 case ETHTOOL_SRXFHINDIR:
1694 rc = ethtool_set_rxfh_indir(dev, useraddr);
1695 break;
1696 default:
1697 rc = -EOPNOTSUPP;
1698 }
1699
1700 if (dev->ethtool_ops->complete)
1701 dev->ethtool_ops->complete(dev);
1702
1703 if (old_features != dev->features)
1704 netdev_features_change(dev);
1705
1706 return rc;
1707 }
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