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Merge tag 'tty-3.12-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
[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/net_tstamp.h>
21 #include <linux/phy.h>
22 #include <linux/bitops.h>
23 #include <linux/uaccess.h>
24 #include <linux/vmalloc.h>
25 #include <linux/slab.h>
26 #include <linux/rtnetlink.h>
27 #include <linux/sched.h>
28
29 /*
30 * Some useful ethtool_ops methods that're device independent.
31 * If we find that all drivers want to do the same thing here,
32 * we can turn these into dev_() function calls.
33 */
34
35 u32 ethtool_op_get_link(struct net_device *dev)
36 {
37 return netif_carrier_ok(dev) ? 1 : 0;
38 }
39 EXPORT_SYMBOL(ethtool_op_get_link);
40
41 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
42 {
43 info->so_timestamping =
44 SOF_TIMESTAMPING_TX_SOFTWARE |
45 SOF_TIMESTAMPING_RX_SOFTWARE |
46 SOF_TIMESTAMPING_SOFTWARE;
47 info->phc_index = -1;
48 return 0;
49 }
50 EXPORT_SYMBOL(ethtool_op_get_ts_info);
51
52 /* Handlers for each ethtool command */
53
54 #define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
55
56 static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
57 [NETIF_F_SG_BIT] = "tx-scatter-gather",
58 [NETIF_F_IP_CSUM_BIT] = "tx-checksum-ipv4",
59 [NETIF_F_HW_CSUM_BIT] = "tx-checksum-ip-generic",
60 [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6",
61 [NETIF_F_HIGHDMA_BIT] = "highdma",
62 [NETIF_F_FRAGLIST_BIT] = "tx-scatter-gather-fraglist",
63 [NETIF_F_HW_VLAN_CTAG_TX_BIT] = "tx-vlan-hw-insert",
64
65 [NETIF_F_HW_VLAN_CTAG_RX_BIT] = "rx-vlan-hw-parse",
66 [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
67 [NETIF_F_HW_VLAN_STAG_TX_BIT] = "tx-vlan-stag-hw-insert",
68 [NETIF_F_HW_VLAN_STAG_RX_BIT] = "rx-vlan-stag-hw-parse",
69 [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
70 [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged",
71 [NETIF_F_GSO_BIT] = "tx-generic-segmentation",
72 [NETIF_F_LLTX_BIT] = "tx-lockless",
73 [NETIF_F_NETNS_LOCAL_BIT] = "netns-local",
74 [NETIF_F_GRO_BIT] = "rx-gro",
75 [NETIF_F_LRO_BIT] = "rx-lro",
76
77 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation",
78 [NETIF_F_UFO_BIT] = "tx-udp-fragmentation",
79 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
80 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
81 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
82 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
83 [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
84 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
85 [NETIF_F_GSO_MPLS_BIT] = "tx-mpls-segmentation",
86
87 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
88 [NETIF_F_SCTP_CSUM_BIT] = "tx-checksum-sctp",
89 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
90 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
91 [NETIF_F_RXHASH_BIT] = "rx-hashing",
92 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
93 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
94 [NETIF_F_LOOPBACK_BIT] = "loopback",
95 [NETIF_F_RXFCS_BIT] = "rx-fcs",
96 [NETIF_F_RXALL_BIT] = "rx-all",
97 };
98
99 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
100 {
101 struct ethtool_gfeatures cmd = {
102 .cmd = ETHTOOL_GFEATURES,
103 .size = ETHTOOL_DEV_FEATURE_WORDS,
104 };
105 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
106 u32 __user *sizeaddr;
107 u32 copy_size;
108 int i;
109
110 /* in case feature bits run out again */
111 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
112
113 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
114 features[i].available = (u32)(dev->hw_features >> (32 * i));
115 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
116 features[i].active = (u32)(dev->features >> (32 * i));
117 features[i].never_changed =
118 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
119 }
120
121 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
122 if (get_user(copy_size, sizeaddr))
123 return -EFAULT;
124
125 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
126 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
127
128 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
129 return -EFAULT;
130 useraddr += sizeof(cmd);
131 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
132 return -EFAULT;
133
134 return 0;
135 }
136
137 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
138 {
139 struct ethtool_sfeatures cmd;
140 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
141 netdev_features_t wanted = 0, valid = 0;
142 int i, ret = 0;
143
144 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
145 return -EFAULT;
146 useraddr += sizeof(cmd);
147
148 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
149 return -EINVAL;
150
151 if (copy_from_user(features, useraddr, sizeof(features)))
152 return -EFAULT;
153
154 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
155 valid |= (netdev_features_t)features[i].valid << (32 * i);
156 wanted |= (netdev_features_t)features[i].requested << (32 * i);
157 }
158
159 if (valid & ~NETIF_F_ETHTOOL_BITS)
160 return -EINVAL;
161
162 if (valid & ~dev->hw_features) {
163 valid &= dev->hw_features;
164 ret |= ETHTOOL_F_UNSUPPORTED;
165 }
166
167 dev->wanted_features &= ~valid;
168 dev->wanted_features |= wanted & valid;
169 __netdev_update_features(dev);
170
171 if ((dev->wanted_features ^ dev->features) & valid)
172 ret |= ETHTOOL_F_WISH;
173
174 return ret;
175 }
176
177 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
178 {
179 const struct ethtool_ops *ops = dev->ethtool_ops;
180
181 if (sset == ETH_SS_FEATURES)
182 return ARRAY_SIZE(netdev_features_strings);
183
184 if (ops->get_sset_count && ops->get_strings)
185 return ops->get_sset_count(dev, sset);
186 else
187 return -EOPNOTSUPP;
188 }
189
190 static void __ethtool_get_strings(struct net_device *dev,
191 u32 stringset, u8 *data)
192 {
193 const struct ethtool_ops *ops = dev->ethtool_ops;
194
195 if (stringset == ETH_SS_FEATURES)
196 memcpy(data, netdev_features_strings,
197 sizeof(netdev_features_strings));
198 else
199 /* ops->get_strings is valid because checked earlier */
200 ops->get_strings(dev, stringset, data);
201 }
202
203 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
204 {
205 /* feature masks of legacy discrete ethtool ops */
206
207 switch (eth_cmd) {
208 case ETHTOOL_GTXCSUM:
209 case ETHTOOL_STXCSUM:
210 return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM;
211 case ETHTOOL_GRXCSUM:
212 case ETHTOOL_SRXCSUM:
213 return NETIF_F_RXCSUM;
214 case ETHTOOL_GSG:
215 case ETHTOOL_SSG:
216 return NETIF_F_SG;
217 case ETHTOOL_GTSO:
218 case ETHTOOL_STSO:
219 return NETIF_F_ALL_TSO;
220 case ETHTOOL_GUFO:
221 case ETHTOOL_SUFO:
222 return NETIF_F_UFO;
223 case ETHTOOL_GGSO:
224 case ETHTOOL_SGSO:
225 return NETIF_F_GSO;
226 case ETHTOOL_GGRO:
227 case ETHTOOL_SGRO:
228 return NETIF_F_GRO;
229 default:
230 BUG();
231 }
232 }
233
234 static int ethtool_get_one_feature(struct net_device *dev,
235 char __user *useraddr, u32 ethcmd)
236 {
237 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
238 struct ethtool_value edata = {
239 .cmd = ethcmd,
240 .data = !!(dev->features & mask),
241 };
242
243 if (copy_to_user(useraddr, &edata, sizeof(edata)))
244 return -EFAULT;
245 return 0;
246 }
247
248 static int ethtool_set_one_feature(struct net_device *dev,
249 void __user *useraddr, u32 ethcmd)
250 {
251 struct ethtool_value edata;
252 netdev_features_t mask;
253
254 if (copy_from_user(&edata, useraddr, sizeof(edata)))
255 return -EFAULT;
256
257 mask = ethtool_get_feature_mask(ethcmd);
258 mask &= dev->hw_features;
259 if (!mask)
260 return -EOPNOTSUPP;
261
262 if (edata.data)
263 dev->wanted_features |= mask;
264 else
265 dev->wanted_features &= ~mask;
266
267 __netdev_update_features(dev);
268
269 return 0;
270 }
271
272 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
273 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
274 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
275 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
276 NETIF_F_RXHASH)
277
278 static u32 __ethtool_get_flags(struct net_device *dev)
279 {
280 u32 flags = 0;
281
282 if (dev->features & NETIF_F_LRO)
283 flags |= ETH_FLAG_LRO;
284 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
285 flags |= ETH_FLAG_RXVLAN;
286 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
287 flags |= ETH_FLAG_TXVLAN;
288 if (dev->features & NETIF_F_NTUPLE)
289 flags |= ETH_FLAG_NTUPLE;
290 if (dev->features & NETIF_F_RXHASH)
291 flags |= ETH_FLAG_RXHASH;
292
293 return flags;
294 }
295
296 static int __ethtool_set_flags(struct net_device *dev, u32 data)
297 {
298 netdev_features_t features = 0, changed;
299
300 if (data & ~ETH_ALL_FLAGS)
301 return -EINVAL;
302
303 if (data & ETH_FLAG_LRO)
304 features |= NETIF_F_LRO;
305 if (data & ETH_FLAG_RXVLAN)
306 features |= NETIF_F_HW_VLAN_CTAG_RX;
307 if (data & ETH_FLAG_TXVLAN)
308 features |= NETIF_F_HW_VLAN_CTAG_TX;
309 if (data & ETH_FLAG_NTUPLE)
310 features |= NETIF_F_NTUPLE;
311 if (data & ETH_FLAG_RXHASH)
312 features |= NETIF_F_RXHASH;
313
314 /* allow changing only bits set in hw_features */
315 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
316 if (changed & ~dev->hw_features)
317 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
318
319 dev->wanted_features =
320 (dev->wanted_features & ~changed) | (features & changed);
321
322 __netdev_update_features(dev);
323
324 return 0;
325 }
326
327 int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
328 {
329 ASSERT_RTNL();
330
331 if (!dev->ethtool_ops->get_settings)
332 return -EOPNOTSUPP;
333
334 memset(cmd, 0, sizeof(struct ethtool_cmd));
335 cmd->cmd = ETHTOOL_GSET;
336 return dev->ethtool_ops->get_settings(dev, cmd);
337 }
338 EXPORT_SYMBOL(__ethtool_get_settings);
339
340 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
341 {
342 int err;
343 struct ethtool_cmd cmd;
344
345 err = __ethtool_get_settings(dev, &cmd);
346 if (err < 0)
347 return err;
348
349 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
350 return -EFAULT;
351 return 0;
352 }
353
354 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
355 {
356 struct ethtool_cmd cmd;
357
358 if (!dev->ethtool_ops->set_settings)
359 return -EOPNOTSUPP;
360
361 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
362 return -EFAULT;
363
364 return dev->ethtool_ops->set_settings(dev, &cmd);
365 }
366
367 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
368 void __user *useraddr)
369 {
370 struct ethtool_drvinfo info;
371 const struct ethtool_ops *ops = dev->ethtool_ops;
372
373 memset(&info, 0, sizeof(info));
374 info.cmd = ETHTOOL_GDRVINFO;
375 if (ops->get_drvinfo) {
376 ops->get_drvinfo(dev, &info);
377 } else if (dev->dev.parent && dev->dev.parent->driver) {
378 strlcpy(info.bus_info, dev_name(dev->dev.parent),
379 sizeof(info.bus_info));
380 strlcpy(info.driver, dev->dev.parent->driver->name,
381 sizeof(info.driver));
382 } else {
383 return -EOPNOTSUPP;
384 }
385
386 /*
387 * this method of obtaining string set info is deprecated;
388 * Use ETHTOOL_GSSET_INFO instead.
389 */
390 if (ops->get_sset_count) {
391 int rc;
392
393 rc = ops->get_sset_count(dev, ETH_SS_TEST);
394 if (rc >= 0)
395 info.testinfo_len = rc;
396 rc = ops->get_sset_count(dev, ETH_SS_STATS);
397 if (rc >= 0)
398 info.n_stats = rc;
399 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
400 if (rc >= 0)
401 info.n_priv_flags = rc;
402 }
403 if (ops->get_regs_len)
404 info.regdump_len = ops->get_regs_len(dev);
405 if (ops->get_eeprom_len)
406 info.eedump_len = ops->get_eeprom_len(dev);
407
408 if (copy_to_user(useraddr, &info, sizeof(info)))
409 return -EFAULT;
410 return 0;
411 }
412
413 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
414 void __user *useraddr)
415 {
416 struct ethtool_sset_info info;
417 u64 sset_mask;
418 int i, idx = 0, n_bits = 0, ret, rc;
419 u32 *info_buf = NULL;
420
421 if (copy_from_user(&info, useraddr, sizeof(info)))
422 return -EFAULT;
423
424 /* store copy of mask, because we zero struct later on */
425 sset_mask = info.sset_mask;
426 if (!sset_mask)
427 return 0;
428
429 /* calculate size of return buffer */
430 n_bits = hweight64(sset_mask);
431
432 memset(&info, 0, sizeof(info));
433 info.cmd = ETHTOOL_GSSET_INFO;
434
435 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
436 if (!info_buf)
437 return -ENOMEM;
438
439 /*
440 * fill return buffer based on input bitmask and successful
441 * get_sset_count return
442 */
443 for (i = 0; i < 64; i++) {
444 if (!(sset_mask & (1ULL << i)))
445 continue;
446
447 rc = __ethtool_get_sset_count(dev, i);
448 if (rc >= 0) {
449 info.sset_mask |= (1ULL << i);
450 info_buf[idx++] = rc;
451 }
452 }
453
454 ret = -EFAULT;
455 if (copy_to_user(useraddr, &info, sizeof(info)))
456 goto out;
457
458 useraddr += offsetof(struct ethtool_sset_info, data);
459 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
460 goto out;
461
462 ret = 0;
463
464 out:
465 kfree(info_buf);
466 return ret;
467 }
468
469 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
470 u32 cmd, void __user *useraddr)
471 {
472 struct ethtool_rxnfc info;
473 size_t info_size = sizeof(info);
474 int rc;
475
476 if (!dev->ethtool_ops->set_rxnfc)
477 return -EOPNOTSUPP;
478
479 /* struct ethtool_rxnfc was originally defined for
480 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
481 * members. User-space might still be using that
482 * definition. */
483 if (cmd == ETHTOOL_SRXFH)
484 info_size = (offsetof(struct ethtool_rxnfc, data) +
485 sizeof(info.data));
486
487 if (copy_from_user(&info, useraddr, info_size))
488 return -EFAULT;
489
490 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
491 if (rc)
492 return rc;
493
494 if (cmd == ETHTOOL_SRXCLSRLINS &&
495 copy_to_user(useraddr, &info, info_size))
496 return -EFAULT;
497
498 return 0;
499 }
500
501 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
502 u32 cmd, void __user *useraddr)
503 {
504 struct ethtool_rxnfc info;
505 size_t info_size = sizeof(info);
506 const struct ethtool_ops *ops = dev->ethtool_ops;
507 int ret;
508 void *rule_buf = NULL;
509
510 if (!ops->get_rxnfc)
511 return -EOPNOTSUPP;
512
513 /* struct ethtool_rxnfc was originally defined for
514 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
515 * members. User-space might still be using that
516 * definition. */
517 if (cmd == ETHTOOL_GRXFH)
518 info_size = (offsetof(struct ethtool_rxnfc, data) +
519 sizeof(info.data));
520
521 if (copy_from_user(&info, useraddr, info_size))
522 return -EFAULT;
523
524 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
525 if (info.rule_cnt > 0) {
526 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
527 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
528 GFP_USER);
529 if (!rule_buf)
530 return -ENOMEM;
531 }
532 }
533
534 ret = ops->get_rxnfc(dev, &info, rule_buf);
535 if (ret < 0)
536 goto err_out;
537
538 ret = -EFAULT;
539 if (copy_to_user(useraddr, &info, info_size))
540 goto err_out;
541
542 if (rule_buf) {
543 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
544 if (copy_to_user(useraddr, rule_buf,
545 info.rule_cnt * sizeof(u32)))
546 goto err_out;
547 }
548 ret = 0;
549
550 err_out:
551 kfree(rule_buf);
552
553 return ret;
554 }
555
556 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
557 void __user *useraddr)
558 {
559 u32 user_size, dev_size;
560 u32 *indir;
561 int ret;
562
563 if (!dev->ethtool_ops->get_rxfh_indir_size ||
564 !dev->ethtool_ops->get_rxfh_indir)
565 return -EOPNOTSUPP;
566 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
567 if (dev_size == 0)
568 return -EOPNOTSUPP;
569
570 if (copy_from_user(&user_size,
571 useraddr + offsetof(struct ethtool_rxfh_indir, size),
572 sizeof(user_size)))
573 return -EFAULT;
574
575 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
576 &dev_size, sizeof(dev_size)))
577 return -EFAULT;
578
579 /* If the user buffer size is 0, this is just a query for the
580 * device table size. Otherwise, if it's smaller than the
581 * device table size it's an error.
582 */
583 if (user_size < dev_size)
584 return user_size == 0 ? 0 : -EINVAL;
585
586 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
587 if (!indir)
588 return -ENOMEM;
589
590 ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
591 if (ret)
592 goto out;
593
594 if (copy_to_user(useraddr +
595 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
596 indir, dev_size * sizeof(indir[0])))
597 ret = -EFAULT;
598
599 out:
600 kfree(indir);
601 return ret;
602 }
603
604 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
605 void __user *useraddr)
606 {
607 struct ethtool_rxnfc rx_rings;
608 u32 user_size, dev_size, i;
609 u32 *indir;
610 const struct ethtool_ops *ops = dev->ethtool_ops;
611 int ret;
612
613 if (!ops->get_rxfh_indir_size || !ops->set_rxfh_indir ||
614 !ops->get_rxnfc)
615 return -EOPNOTSUPP;
616
617 dev_size = ops->get_rxfh_indir_size(dev);
618 if (dev_size == 0)
619 return -EOPNOTSUPP;
620
621 if (copy_from_user(&user_size,
622 useraddr + offsetof(struct ethtool_rxfh_indir, size),
623 sizeof(user_size)))
624 return -EFAULT;
625
626 if (user_size != 0 && user_size != dev_size)
627 return -EINVAL;
628
629 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
630 if (!indir)
631 return -ENOMEM;
632
633 rx_rings.cmd = ETHTOOL_GRXRINGS;
634 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
635 if (ret)
636 goto out;
637
638 if (user_size == 0) {
639 for (i = 0; i < dev_size; i++)
640 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
641 } else {
642 if (copy_from_user(indir,
643 useraddr +
644 offsetof(struct ethtool_rxfh_indir,
645 ring_index[0]),
646 dev_size * sizeof(indir[0]))) {
647 ret = -EFAULT;
648 goto out;
649 }
650
651 /* Validate ring indices */
652 for (i = 0; i < dev_size; i++) {
653 if (indir[i] >= rx_rings.data) {
654 ret = -EINVAL;
655 goto out;
656 }
657 }
658 }
659
660 ret = ops->set_rxfh_indir(dev, indir);
661
662 out:
663 kfree(indir);
664 return ret;
665 }
666
667 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
668 {
669 struct ethtool_regs regs;
670 const struct ethtool_ops *ops = dev->ethtool_ops;
671 void *regbuf;
672 int reglen, ret;
673
674 if (!ops->get_regs || !ops->get_regs_len)
675 return -EOPNOTSUPP;
676
677 if (copy_from_user(&regs, useraddr, sizeof(regs)))
678 return -EFAULT;
679
680 reglen = ops->get_regs_len(dev);
681 if (regs.len > reglen)
682 regs.len = reglen;
683
684 regbuf = vzalloc(reglen);
685 if (reglen && !regbuf)
686 return -ENOMEM;
687
688 ops->get_regs(dev, &regs, regbuf);
689
690 ret = -EFAULT;
691 if (copy_to_user(useraddr, &regs, sizeof(regs)))
692 goto out;
693 useraddr += offsetof(struct ethtool_regs, data);
694 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
695 goto out;
696 ret = 0;
697
698 out:
699 vfree(regbuf);
700 return ret;
701 }
702
703 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
704 {
705 struct ethtool_value reset;
706 int ret;
707
708 if (!dev->ethtool_ops->reset)
709 return -EOPNOTSUPP;
710
711 if (copy_from_user(&reset, useraddr, sizeof(reset)))
712 return -EFAULT;
713
714 ret = dev->ethtool_ops->reset(dev, &reset.data);
715 if (ret)
716 return ret;
717
718 if (copy_to_user(useraddr, &reset, sizeof(reset)))
719 return -EFAULT;
720 return 0;
721 }
722
723 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
724 {
725 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
726
727 if (!dev->ethtool_ops->get_wol)
728 return -EOPNOTSUPP;
729
730 dev->ethtool_ops->get_wol(dev, &wol);
731
732 if (copy_to_user(useraddr, &wol, sizeof(wol)))
733 return -EFAULT;
734 return 0;
735 }
736
737 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
738 {
739 struct ethtool_wolinfo wol;
740
741 if (!dev->ethtool_ops->set_wol)
742 return -EOPNOTSUPP;
743
744 if (copy_from_user(&wol, useraddr, sizeof(wol)))
745 return -EFAULT;
746
747 return dev->ethtool_ops->set_wol(dev, &wol);
748 }
749
750 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
751 {
752 struct ethtool_eee edata;
753 int rc;
754
755 if (!dev->ethtool_ops->get_eee)
756 return -EOPNOTSUPP;
757
758 memset(&edata, 0, sizeof(struct ethtool_eee));
759 edata.cmd = ETHTOOL_GEEE;
760 rc = dev->ethtool_ops->get_eee(dev, &edata);
761
762 if (rc)
763 return rc;
764
765 if (copy_to_user(useraddr, &edata, sizeof(edata)))
766 return -EFAULT;
767
768 return 0;
769 }
770
771 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
772 {
773 struct ethtool_eee edata;
774
775 if (!dev->ethtool_ops->set_eee)
776 return -EOPNOTSUPP;
777
778 if (copy_from_user(&edata, useraddr, sizeof(edata)))
779 return -EFAULT;
780
781 return dev->ethtool_ops->set_eee(dev, &edata);
782 }
783
784 static int ethtool_nway_reset(struct net_device *dev)
785 {
786 if (!dev->ethtool_ops->nway_reset)
787 return -EOPNOTSUPP;
788
789 return dev->ethtool_ops->nway_reset(dev);
790 }
791
792 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
793 {
794 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
795
796 if (!dev->ethtool_ops->get_link)
797 return -EOPNOTSUPP;
798
799 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
800
801 if (copy_to_user(useraddr, &edata, sizeof(edata)))
802 return -EFAULT;
803 return 0;
804 }
805
806 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
807 int (*getter)(struct net_device *,
808 struct ethtool_eeprom *, u8 *),
809 u32 total_len)
810 {
811 struct ethtool_eeprom eeprom;
812 void __user *userbuf = useraddr + sizeof(eeprom);
813 u32 bytes_remaining;
814 u8 *data;
815 int ret = 0;
816
817 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
818 return -EFAULT;
819
820 /* Check for wrap and zero */
821 if (eeprom.offset + eeprom.len <= eeprom.offset)
822 return -EINVAL;
823
824 /* Check for exceeding total eeprom len */
825 if (eeprom.offset + eeprom.len > total_len)
826 return -EINVAL;
827
828 data = kmalloc(PAGE_SIZE, GFP_USER);
829 if (!data)
830 return -ENOMEM;
831
832 bytes_remaining = eeprom.len;
833 while (bytes_remaining > 0) {
834 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
835
836 ret = getter(dev, &eeprom, data);
837 if (ret)
838 break;
839 if (copy_to_user(userbuf, data, eeprom.len)) {
840 ret = -EFAULT;
841 break;
842 }
843 userbuf += eeprom.len;
844 eeprom.offset += eeprom.len;
845 bytes_remaining -= eeprom.len;
846 }
847
848 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
849 eeprom.offset -= eeprom.len;
850 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
851 ret = -EFAULT;
852
853 kfree(data);
854 return ret;
855 }
856
857 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
858 {
859 const struct ethtool_ops *ops = dev->ethtool_ops;
860
861 if (!ops->get_eeprom || !ops->get_eeprom_len)
862 return -EOPNOTSUPP;
863
864 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
865 ops->get_eeprom_len(dev));
866 }
867
868 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
869 {
870 struct ethtool_eeprom eeprom;
871 const struct ethtool_ops *ops = dev->ethtool_ops;
872 void __user *userbuf = useraddr + sizeof(eeprom);
873 u32 bytes_remaining;
874 u8 *data;
875 int ret = 0;
876
877 if (!ops->set_eeprom || !ops->get_eeprom_len)
878 return -EOPNOTSUPP;
879
880 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
881 return -EFAULT;
882
883 /* Check for wrap and zero */
884 if (eeprom.offset + eeprom.len <= eeprom.offset)
885 return -EINVAL;
886
887 /* Check for exceeding total eeprom len */
888 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
889 return -EINVAL;
890
891 data = kmalloc(PAGE_SIZE, GFP_USER);
892 if (!data)
893 return -ENOMEM;
894
895 bytes_remaining = eeprom.len;
896 while (bytes_remaining > 0) {
897 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
898
899 if (copy_from_user(data, userbuf, eeprom.len)) {
900 ret = -EFAULT;
901 break;
902 }
903 ret = ops->set_eeprom(dev, &eeprom, data);
904 if (ret)
905 break;
906 userbuf += eeprom.len;
907 eeprom.offset += eeprom.len;
908 bytes_remaining -= eeprom.len;
909 }
910
911 kfree(data);
912 return ret;
913 }
914
915 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
916 void __user *useraddr)
917 {
918 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
919
920 if (!dev->ethtool_ops->get_coalesce)
921 return -EOPNOTSUPP;
922
923 dev->ethtool_ops->get_coalesce(dev, &coalesce);
924
925 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
926 return -EFAULT;
927 return 0;
928 }
929
930 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
931 void __user *useraddr)
932 {
933 struct ethtool_coalesce coalesce;
934
935 if (!dev->ethtool_ops->set_coalesce)
936 return -EOPNOTSUPP;
937
938 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
939 return -EFAULT;
940
941 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
942 }
943
944 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
945 {
946 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
947
948 if (!dev->ethtool_ops->get_ringparam)
949 return -EOPNOTSUPP;
950
951 dev->ethtool_ops->get_ringparam(dev, &ringparam);
952
953 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
954 return -EFAULT;
955 return 0;
956 }
957
958 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
959 {
960 struct ethtool_ringparam ringparam;
961
962 if (!dev->ethtool_ops->set_ringparam)
963 return -EOPNOTSUPP;
964
965 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
966 return -EFAULT;
967
968 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
969 }
970
971 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
972 void __user *useraddr)
973 {
974 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
975
976 if (!dev->ethtool_ops->get_channels)
977 return -EOPNOTSUPP;
978
979 dev->ethtool_ops->get_channels(dev, &channels);
980
981 if (copy_to_user(useraddr, &channels, sizeof(channels)))
982 return -EFAULT;
983 return 0;
984 }
985
986 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
987 void __user *useraddr)
988 {
989 struct ethtool_channels channels;
990
991 if (!dev->ethtool_ops->set_channels)
992 return -EOPNOTSUPP;
993
994 if (copy_from_user(&channels, useraddr, sizeof(channels)))
995 return -EFAULT;
996
997 return dev->ethtool_ops->set_channels(dev, &channels);
998 }
999
1000 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1001 {
1002 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1003
1004 if (!dev->ethtool_ops->get_pauseparam)
1005 return -EOPNOTSUPP;
1006
1007 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1008
1009 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1010 return -EFAULT;
1011 return 0;
1012 }
1013
1014 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1015 {
1016 struct ethtool_pauseparam pauseparam;
1017
1018 if (!dev->ethtool_ops->set_pauseparam)
1019 return -EOPNOTSUPP;
1020
1021 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1022 return -EFAULT;
1023
1024 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1025 }
1026
1027 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1028 {
1029 struct ethtool_test test;
1030 const struct ethtool_ops *ops = dev->ethtool_ops;
1031 u64 *data;
1032 int ret, test_len;
1033
1034 if (!ops->self_test || !ops->get_sset_count)
1035 return -EOPNOTSUPP;
1036
1037 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1038 if (test_len < 0)
1039 return test_len;
1040 WARN_ON(test_len == 0);
1041
1042 if (copy_from_user(&test, useraddr, sizeof(test)))
1043 return -EFAULT;
1044
1045 test.len = test_len;
1046 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1047 if (!data)
1048 return -ENOMEM;
1049
1050 ops->self_test(dev, &test, data);
1051
1052 ret = -EFAULT;
1053 if (copy_to_user(useraddr, &test, sizeof(test)))
1054 goto out;
1055 useraddr += sizeof(test);
1056 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1057 goto out;
1058 ret = 0;
1059
1060 out:
1061 kfree(data);
1062 return ret;
1063 }
1064
1065 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1066 {
1067 struct ethtool_gstrings gstrings;
1068 u8 *data;
1069 int ret;
1070
1071 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1072 return -EFAULT;
1073
1074 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1075 if (ret < 0)
1076 return ret;
1077
1078 gstrings.len = ret;
1079
1080 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1081 if (!data)
1082 return -ENOMEM;
1083
1084 __ethtool_get_strings(dev, gstrings.string_set, data);
1085
1086 ret = -EFAULT;
1087 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1088 goto out;
1089 useraddr += sizeof(gstrings);
1090 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1091 goto out;
1092 ret = 0;
1093
1094 out:
1095 kfree(data);
1096 return ret;
1097 }
1098
1099 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1100 {
1101 struct ethtool_value id;
1102 static bool busy;
1103 const struct ethtool_ops *ops = dev->ethtool_ops;
1104 int rc;
1105
1106 if (!ops->set_phys_id)
1107 return -EOPNOTSUPP;
1108
1109 if (busy)
1110 return -EBUSY;
1111
1112 if (copy_from_user(&id, useraddr, sizeof(id)))
1113 return -EFAULT;
1114
1115 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1116 if (rc < 0)
1117 return rc;
1118
1119 /* Drop the RTNL lock while waiting, but prevent reentry or
1120 * removal of the device.
1121 */
1122 busy = true;
1123 dev_hold(dev);
1124 rtnl_unlock();
1125
1126 if (rc == 0) {
1127 /* Driver will handle this itself */
1128 schedule_timeout_interruptible(
1129 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1130 } else {
1131 /* Driver expects to be called at twice the frequency in rc */
1132 int n = rc * 2, i, interval = HZ / n;
1133
1134 /* Count down seconds */
1135 do {
1136 /* Count down iterations per second */
1137 i = n;
1138 do {
1139 rtnl_lock();
1140 rc = ops->set_phys_id(dev,
1141 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1142 rtnl_unlock();
1143 if (rc)
1144 break;
1145 schedule_timeout_interruptible(interval);
1146 } while (!signal_pending(current) && --i != 0);
1147 } while (!signal_pending(current) &&
1148 (id.data == 0 || --id.data != 0));
1149 }
1150
1151 rtnl_lock();
1152 dev_put(dev);
1153 busy = false;
1154
1155 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1156 return rc;
1157 }
1158
1159 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1160 {
1161 struct ethtool_stats stats;
1162 const struct ethtool_ops *ops = dev->ethtool_ops;
1163 u64 *data;
1164 int ret, n_stats;
1165
1166 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1167 return -EOPNOTSUPP;
1168
1169 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1170 if (n_stats < 0)
1171 return n_stats;
1172 WARN_ON(n_stats == 0);
1173
1174 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1175 return -EFAULT;
1176
1177 stats.n_stats = n_stats;
1178 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1179 if (!data)
1180 return -ENOMEM;
1181
1182 ops->get_ethtool_stats(dev, &stats, data);
1183
1184 ret = -EFAULT;
1185 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1186 goto out;
1187 useraddr += sizeof(stats);
1188 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1189 goto out;
1190 ret = 0;
1191
1192 out:
1193 kfree(data);
1194 return ret;
1195 }
1196
1197 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1198 {
1199 struct ethtool_perm_addr epaddr;
1200
1201 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1202 return -EFAULT;
1203
1204 if (epaddr.size < dev->addr_len)
1205 return -ETOOSMALL;
1206 epaddr.size = dev->addr_len;
1207
1208 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1209 return -EFAULT;
1210 useraddr += sizeof(epaddr);
1211 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1212 return -EFAULT;
1213 return 0;
1214 }
1215
1216 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1217 u32 cmd, u32 (*actor)(struct net_device *))
1218 {
1219 struct ethtool_value edata = { .cmd = cmd };
1220
1221 if (!actor)
1222 return -EOPNOTSUPP;
1223
1224 edata.data = actor(dev);
1225
1226 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1227 return -EFAULT;
1228 return 0;
1229 }
1230
1231 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1232 void (*actor)(struct net_device *, u32))
1233 {
1234 struct ethtool_value edata;
1235
1236 if (!actor)
1237 return -EOPNOTSUPP;
1238
1239 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1240 return -EFAULT;
1241
1242 actor(dev, edata.data);
1243 return 0;
1244 }
1245
1246 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1247 int (*actor)(struct net_device *, u32))
1248 {
1249 struct ethtool_value edata;
1250
1251 if (!actor)
1252 return -EOPNOTSUPP;
1253
1254 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1255 return -EFAULT;
1256
1257 return actor(dev, edata.data);
1258 }
1259
1260 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1261 char __user *useraddr)
1262 {
1263 struct ethtool_flash efl;
1264
1265 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1266 return -EFAULT;
1267
1268 if (!dev->ethtool_ops->flash_device)
1269 return -EOPNOTSUPP;
1270
1271 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
1272
1273 return dev->ethtool_ops->flash_device(dev, &efl);
1274 }
1275
1276 static int ethtool_set_dump(struct net_device *dev,
1277 void __user *useraddr)
1278 {
1279 struct ethtool_dump dump;
1280
1281 if (!dev->ethtool_ops->set_dump)
1282 return -EOPNOTSUPP;
1283
1284 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1285 return -EFAULT;
1286
1287 return dev->ethtool_ops->set_dump(dev, &dump);
1288 }
1289
1290 static int ethtool_get_dump_flag(struct net_device *dev,
1291 void __user *useraddr)
1292 {
1293 int ret;
1294 struct ethtool_dump dump;
1295 const struct ethtool_ops *ops = dev->ethtool_ops;
1296
1297 if (!ops->get_dump_flag)
1298 return -EOPNOTSUPP;
1299
1300 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1301 return -EFAULT;
1302
1303 ret = ops->get_dump_flag(dev, &dump);
1304 if (ret)
1305 return ret;
1306
1307 if (copy_to_user(useraddr, &dump, sizeof(dump)))
1308 return -EFAULT;
1309 return 0;
1310 }
1311
1312 static int ethtool_get_dump_data(struct net_device *dev,
1313 void __user *useraddr)
1314 {
1315 int ret;
1316 __u32 len;
1317 struct ethtool_dump dump, tmp;
1318 const struct ethtool_ops *ops = dev->ethtool_ops;
1319 void *data = NULL;
1320
1321 if (!ops->get_dump_data || !ops->get_dump_flag)
1322 return -EOPNOTSUPP;
1323
1324 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1325 return -EFAULT;
1326
1327 memset(&tmp, 0, sizeof(tmp));
1328 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
1329 ret = ops->get_dump_flag(dev, &tmp);
1330 if (ret)
1331 return ret;
1332
1333 len = min(tmp.len, dump.len);
1334 if (!len)
1335 return -EFAULT;
1336
1337 /* Don't ever let the driver think there's more space available
1338 * than it requested with .get_dump_flag().
1339 */
1340 dump.len = len;
1341
1342 /* Always allocate enough space to hold the whole thing so that the
1343 * driver does not need to check the length and bother with partial
1344 * dumping.
1345 */
1346 data = vzalloc(tmp.len);
1347 if (!data)
1348 return -ENOMEM;
1349 ret = ops->get_dump_data(dev, &dump, data);
1350 if (ret)
1351 goto out;
1352
1353 /* There are two sane possibilities:
1354 * 1. The driver's .get_dump_data() does not touch dump.len.
1355 * 2. Or it may set dump.len to how much it really writes, which
1356 * should be tmp.len (or len if it can do a partial dump).
1357 * In any case respond to userspace with the actual length of data
1358 * it's receiving.
1359 */
1360 WARN_ON(dump.len != len && dump.len != tmp.len);
1361 dump.len = len;
1362
1363 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
1364 ret = -EFAULT;
1365 goto out;
1366 }
1367 useraddr += offsetof(struct ethtool_dump, data);
1368 if (copy_to_user(useraddr, data, len))
1369 ret = -EFAULT;
1370 out:
1371 vfree(data);
1372 return ret;
1373 }
1374
1375 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
1376 {
1377 int err = 0;
1378 struct ethtool_ts_info info;
1379 const struct ethtool_ops *ops = dev->ethtool_ops;
1380 struct phy_device *phydev = dev->phydev;
1381
1382 memset(&info, 0, sizeof(info));
1383 info.cmd = ETHTOOL_GET_TS_INFO;
1384
1385 if (phydev && phydev->drv && phydev->drv->ts_info) {
1386 err = phydev->drv->ts_info(phydev, &info);
1387 } else if (ops->get_ts_info) {
1388 err = ops->get_ts_info(dev, &info);
1389 } else {
1390 info.so_timestamping =
1391 SOF_TIMESTAMPING_RX_SOFTWARE |
1392 SOF_TIMESTAMPING_SOFTWARE;
1393 info.phc_index = -1;
1394 }
1395
1396 if (err)
1397 return err;
1398
1399 if (copy_to_user(useraddr, &info, sizeof(info)))
1400 err = -EFAULT;
1401
1402 return err;
1403 }
1404
1405 static int ethtool_get_module_info(struct net_device *dev,
1406 void __user *useraddr)
1407 {
1408 int ret;
1409 struct ethtool_modinfo modinfo;
1410 const struct ethtool_ops *ops = dev->ethtool_ops;
1411
1412 if (!ops->get_module_info)
1413 return -EOPNOTSUPP;
1414
1415 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
1416 return -EFAULT;
1417
1418 ret = ops->get_module_info(dev, &modinfo);
1419 if (ret)
1420 return ret;
1421
1422 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
1423 return -EFAULT;
1424
1425 return 0;
1426 }
1427
1428 static int ethtool_get_module_eeprom(struct net_device *dev,
1429 void __user *useraddr)
1430 {
1431 int ret;
1432 struct ethtool_modinfo modinfo;
1433 const struct ethtool_ops *ops = dev->ethtool_ops;
1434
1435 if (!ops->get_module_info || !ops->get_module_eeprom)
1436 return -EOPNOTSUPP;
1437
1438 ret = ops->get_module_info(dev, &modinfo);
1439 if (ret)
1440 return ret;
1441
1442 return ethtool_get_any_eeprom(dev, useraddr, ops->get_module_eeprom,
1443 modinfo.eeprom_len);
1444 }
1445
1446 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
1447
1448 int dev_ethtool(struct net *net, struct ifreq *ifr)
1449 {
1450 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1451 void __user *useraddr = ifr->ifr_data;
1452 u32 ethcmd;
1453 int rc;
1454 netdev_features_t old_features;
1455
1456 if (!dev || !netif_device_present(dev))
1457 return -ENODEV;
1458
1459 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1460 return -EFAULT;
1461
1462 /* Allow some commands to be done by anyone */
1463 switch (ethcmd) {
1464 case ETHTOOL_GSET:
1465 case ETHTOOL_GDRVINFO:
1466 case ETHTOOL_GMSGLVL:
1467 case ETHTOOL_GLINK:
1468 case ETHTOOL_GCOALESCE:
1469 case ETHTOOL_GRINGPARAM:
1470 case ETHTOOL_GPAUSEPARAM:
1471 case ETHTOOL_GRXCSUM:
1472 case ETHTOOL_GTXCSUM:
1473 case ETHTOOL_GSG:
1474 case ETHTOOL_GSSET_INFO:
1475 case ETHTOOL_GSTRINGS:
1476 case ETHTOOL_GSTATS:
1477 case ETHTOOL_GTSO:
1478 case ETHTOOL_GPERMADDR:
1479 case ETHTOOL_GUFO:
1480 case ETHTOOL_GGSO:
1481 case ETHTOOL_GGRO:
1482 case ETHTOOL_GFLAGS:
1483 case ETHTOOL_GPFLAGS:
1484 case ETHTOOL_GRXFH:
1485 case ETHTOOL_GRXRINGS:
1486 case ETHTOOL_GRXCLSRLCNT:
1487 case ETHTOOL_GRXCLSRULE:
1488 case ETHTOOL_GRXCLSRLALL:
1489 case ETHTOOL_GRXFHINDIR:
1490 case ETHTOOL_GFEATURES:
1491 case ETHTOOL_GCHANNELS:
1492 case ETHTOOL_GET_TS_INFO:
1493 case ETHTOOL_GEEE:
1494 break;
1495 default:
1496 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1497 return -EPERM;
1498 }
1499
1500 if (dev->ethtool_ops->begin) {
1501 rc = dev->ethtool_ops->begin(dev);
1502 if (rc < 0)
1503 return rc;
1504 }
1505 old_features = dev->features;
1506
1507 switch (ethcmd) {
1508 case ETHTOOL_GSET:
1509 rc = ethtool_get_settings(dev, useraddr);
1510 break;
1511 case ETHTOOL_SSET:
1512 rc = ethtool_set_settings(dev, useraddr);
1513 break;
1514 case ETHTOOL_GDRVINFO:
1515 rc = ethtool_get_drvinfo(dev, useraddr);
1516 break;
1517 case ETHTOOL_GREGS:
1518 rc = ethtool_get_regs(dev, useraddr);
1519 break;
1520 case ETHTOOL_GWOL:
1521 rc = ethtool_get_wol(dev, useraddr);
1522 break;
1523 case ETHTOOL_SWOL:
1524 rc = ethtool_set_wol(dev, useraddr);
1525 break;
1526 case ETHTOOL_GMSGLVL:
1527 rc = ethtool_get_value(dev, useraddr, ethcmd,
1528 dev->ethtool_ops->get_msglevel);
1529 break;
1530 case ETHTOOL_SMSGLVL:
1531 rc = ethtool_set_value_void(dev, useraddr,
1532 dev->ethtool_ops->set_msglevel);
1533 break;
1534 case ETHTOOL_GEEE:
1535 rc = ethtool_get_eee(dev, useraddr);
1536 break;
1537 case ETHTOOL_SEEE:
1538 rc = ethtool_set_eee(dev, useraddr);
1539 break;
1540 case ETHTOOL_NWAY_RST:
1541 rc = ethtool_nway_reset(dev);
1542 break;
1543 case ETHTOOL_GLINK:
1544 rc = ethtool_get_link(dev, useraddr);
1545 break;
1546 case ETHTOOL_GEEPROM:
1547 rc = ethtool_get_eeprom(dev, useraddr);
1548 break;
1549 case ETHTOOL_SEEPROM:
1550 rc = ethtool_set_eeprom(dev, useraddr);
1551 break;
1552 case ETHTOOL_GCOALESCE:
1553 rc = ethtool_get_coalesce(dev, useraddr);
1554 break;
1555 case ETHTOOL_SCOALESCE:
1556 rc = ethtool_set_coalesce(dev, useraddr);
1557 break;
1558 case ETHTOOL_GRINGPARAM:
1559 rc = ethtool_get_ringparam(dev, useraddr);
1560 break;
1561 case ETHTOOL_SRINGPARAM:
1562 rc = ethtool_set_ringparam(dev, useraddr);
1563 break;
1564 case ETHTOOL_GPAUSEPARAM:
1565 rc = ethtool_get_pauseparam(dev, useraddr);
1566 break;
1567 case ETHTOOL_SPAUSEPARAM:
1568 rc = ethtool_set_pauseparam(dev, useraddr);
1569 break;
1570 case ETHTOOL_TEST:
1571 rc = ethtool_self_test(dev, useraddr);
1572 break;
1573 case ETHTOOL_GSTRINGS:
1574 rc = ethtool_get_strings(dev, useraddr);
1575 break;
1576 case ETHTOOL_PHYS_ID:
1577 rc = ethtool_phys_id(dev, useraddr);
1578 break;
1579 case ETHTOOL_GSTATS:
1580 rc = ethtool_get_stats(dev, useraddr);
1581 break;
1582 case ETHTOOL_GPERMADDR:
1583 rc = ethtool_get_perm_addr(dev, useraddr);
1584 break;
1585 case ETHTOOL_GFLAGS:
1586 rc = ethtool_get_value(dev, useraddr, ethcmd,
1587 __ethtool_get_flags);
1588 break;
1589 case ETHTOOL_SFLAGS:
1590 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
1591 break;
1592 case ETHTOOL_GPFLAGS:
1593 rc = ethtool_get_value(dev, useraddr, ethcmd,
1594 dev->ethtool_ops->get_priv_flags);
1595 break;
1596 case ETHTOOL_SPFLAGS:
1597 rc = ethtool_set_value(dev, useraddr,
1598 dev->ethtool_ops->set_priv_flags);
1599 break;
1600 case ETHTOOL_GRXFH:
1601 case ETHTOOL_GRXRINGS:
1602 case ETHTOOL_GRXCLSRLCNT:
1603 case ETHTOOL_GRXCLSRULE:
1604 case ETHTOOL_GRXCLSRLALL:
1605 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1606 break;
1607 case ETHTOOL_SRXFH:
1608 case ETHTOOL_SRXCLSRLDEL:
1609 case ETHTOOL_SRXCLSRLINS:
1610 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1611 break;
1612 case ETHTOOL_FLASHDEV:
1613 rc = ethtool_flash_device(dev, useraddr);
1614 break;
1615 case ETHTOOL_RESET:
1616 rc = ethtool_reset(dev, useraddr);
1617 break;
1618 case ETHTOOL_GSSET_INFO:
1619 rc = ethtool_get_sset_info(dev, useraddr);
1620 break;
1621 case ETHTOOL_GRXFHINDIR:
1622 rc = ethtool_get_rxfh_indir(dev, useraddr);
1623 break;
1624 case ETHTOOL_SRXFHINDIR:
1625 rc = ethtool_set_rxfh_indir(dev, useraddr);
1626 break;
1627 case ETHTOOL_GFEATURES:
1628 rc = ethtool_get_features(dev, useraddr);
1629 break;
1630 case ETHTOOL_SFEATURES:
1631 rc = ethtool_set_features(dev, useraddr);
1632 break;
1633 case ETHTOOL_GTXCSUM:
1634 case ETHTOOL_GRXCSUM:
1635 case ETHTOOL_GSG:
1636 case ETHTOOL_GTSO:
1637 case ETHTOOL_GUFO:
1638 case ETHTOOL_GGSO:
1639 case ETHTOOL_GGRO:
1640 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
1641 break;
1642 case ETHTOOL_STXCSUM:
1643 case ETHTOOL_SRXCSUM:
1644 case ETHTOOL_SSG:
1645 case ETHTOOL_STSO:
1646 case ETHTOOL_SUFO:
1647 case ETHTOOL_SGSO:
1648 case ETHTOOL_SGRO:
1649 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
1650 break;
1651 case ETHTOOL_GCHANNELS:
1652 rc = ethtool_get_channels(dev, useraddr);
1653 break;
1654 case ETHTOOL_SCHANNELS:
1655 rc = ethtool_set_channels(dev, useraddr);
1656 break;
1657 case ETHTOOL_SET_DUMP:
1658 rc = ethtool_set_dump(dev, useraddr);
1659 break;
1660 case ETHTOOL_GET_DUMP_FLAG:
1661 rc = ethtool_get_dump_flag(dev, useraddr);
1662 break;
1663 case ETHTOOL_GET_DUMP_DATA:
1664 rc = ethtool_get_dump_data(dev, useraddr);
1665 break;
1666 case ETHTOOL_GET_TS_INFO:
1667 rc = ethtool_get_ts_info(dev, useraddr);
1668 break;
1669 case ETHTOOL_GMODULEINFO:
1670 rc = ethtool_get_module_info(dev, useraddr);
1671 break;
1672 case ETHTOOL_GMODULEEEPROM:
1673 rc = ethtool_get_module_eeprom(dev, useraddr);
1674 break;
1675 default:
1676 rc = -EOPNOTSUPP;
1677 }
1678
1679 if (dev->ethtool_ops->complete)
1680 dev->ethtool_ops->complete(dev);
1681
1682 if (old_features != dev->features)
1683 netdev_features_change(dev);
1684
1685 return rc;
1686 }
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