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Merge tag 'v3.15' into next
[deliverable/linux.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_IPIP_BIT] = "tx-ipip-segmentation",
85 [NETIF_F_GSO_SIT_BIT] = "tx-sit-segmentation",
86 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
87 [NETIF_F_GSO_MPLS_BIT] = "tx-mpls-segmentation",
88
89 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
90 [NETIF_F_SCTP_CSUM_BIT] = "tx-checksum-sctp",
91 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
92 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
93 [NETIF_F_RXHASH_BIT] = "rx-hashing",
94 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
95 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
96 [NETIF_F_LOOPBACK_BIT] = "loopback",
97 [NETIF_F_RXFCS_BIT] = "rx-fcs",
98 [NETIF_F_RXALL_BIT] = "rx-all",
99 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
100 [NETIF_F_BUSY_POLL_BIT] = "busy-poll",
101 };
102
103 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
104 {
105 struct ethtool_gfeatures cmd = {
106 .cmd = ETHTOOL_GFEATURES,
107 .size = ETHTOOL_DEV_FEATURE_WORDS,
108 };
109 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
110 u32 __user *sizeaddr;
111 u32 copy_size;
112 int i;
113
114 /* in case feature bits run out again */
115 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
116
117 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
118 features[i].available = (u32)(dev->hw_features >> (32 * i));
119 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
120 features[i].active = (u32)(dev->features >> (32 * i));
121 features[i].never_changed =
122 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
123 }
124
125 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
126 if (get_user(copy_size, sizeaddr))
127 return -EFAULT;
128
129 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
130 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
131
132 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
133 return -EFAULT;
134 useraddr += sizeof(cmd);
135 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
136 return -EFAULT;
137
138 return 0;
139 }
140
141 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
142 {
143 struct ethtool_sfeatures cmd;
144 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
145 netdev_features_t wanted = 0, valid = 0;
146 int i, ret = 0;
147
148 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
149 return -EFAULT;
150 useraddr += sizeof(cmd);
151
152 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
153 return -EINVAL;
154
155 if (copy_from_user(features, useraddr, sizeof(features)))
156 return -EFAULT;
157
158 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
159 valid |= (netdev_features_t)features[i].valid << (32 * i);
160 wanted |= (netdev_features_t)features[i].requested << (32 * i);
161 }
162
163 if (valid & ~NETIF_F_ETHTOOL_BITS)
164 return -EINVAL;
165
166 if (valid & ~dev->hw_features) {
167 valid &= dev->hw_features;
168 ret |= ETHTOOL_F_UNSUPPORTED;
169 }
170
171 dev->wanted_features &= ~valid;
172 dev->wanted_features |= wanted & valid;
173 __netdev_update_features(dev);
174
175 if ((dev->wanted_features ^ dev->features) & valid)
176 ret |= ETHTOOL_F_WISH;
177
178 return ret;
179 }
180
181 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
182 {
183 const struct ethtool_ops *ops = dev->ethtool_ops;
184
185 if (sset == ETH_SS_FEATURES)
186 return ARRAY_SIZE(netdev_features_strings);
187
188 if (ops->get_sset_count && ops->get_strings)
189 return ops->get_sset_count(dev, sset);
190 else
191 return -EOPNOTSUPP;
192 }
193
194 static void __ethtool_get_strings(struct net_device *dev,
195 u32 stringset, u8 *data)
196 {
197 const struct ethtool_ops *ops = dev->ethtool_ops;
198
199 if (stringset == ETH_SS_FEATURES)
200 memcpy(data, netdev_features_strings,
201 sizeof(netdev_features_strings));
202 else
203 /* ops->get_strings is valid because checked earlier */
204 ops->get_strings(dev, stringset, data);
205 }
206
207 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
208 {
209 /* feature masks of legacy discrete ethtool ops */
210
211 switch (eth_cmd) {
212 case ETHTOOL_GTXCSUM:
213 case ETHTOOL_STXCSUM:
214 return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM;
215 case ETHTOOL_GRXCSUM:
216 case ETHTOOL_SRXCSUM:
217 return NETIF_F_RXCSUM;
218 case ETHTOOL_GSG:
219 case ETHTOOL_SSG:
220 return NETIF_F_SG;
221 case ETHTOOL_GTSO:
222 case ETHTOOL_STSO:
223 return NETIF_F_ALL_TSO;
224 case ETHTOOL_GUFO:
225 case ETHTOOL_SUFO:
226 return NETIF_F_UFO;
227 case ETHTOOL_GGSO:
228 case ETHTOOL_SGSO:
229 return NETIF_F_GSO;
230 case ETHTOOL_GGRO:
231 case ETHTOOL_SGRO:
232 return NETIF_F_GRO;
233 default:
234 BUG();
235 }
236 }
237
238 static int ethtool_get_one_feature(struct net_device *dev,
239 char __user *useraddr, u32 ethcmd)
240 {
241 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
242 struct ethtool_value edata = {
243 .cmd = ethcmd,
244 .data = !!(dev->features & mask),
245 };
246
247 if (copy_to_user(useraddr, &edata, sizeof(edata)))
248 return -EFAULT;
249 return 0;
250 }
251
252 static int ethtool_set_one_feature(struct net_device *dev,
253 void __user *useraddr, u32 ethcmd)
254 {
255 struct ethtool_value edata;
256 netdev_features_t mask;
257
258 if (copy_from_user(&edata, useraddr, sizeof(edata)))
259 return -EFAULT;
260
261 mask = ethtool_get_feature_mask(ethcmd);
262 mask &= dev->hw_features;
263 if (!mask)
264 return -EOPNOTSUPP;
265
266 if (edata.data)
267 dev->wanted_features |= mask;
268 else
269 dev->wanted_features &= ~mask;
270
271 __netdev_update_features(dev);
272
273 return 0;
274 }
275
276 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
277 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
278 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
279 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
280 NETIF_F_RXHASH)
281
282 static u32 __ethtool_get_flags(struct net_device *dev)
283 {
284 u32 flags = 0;
285
286 if (dev->features & NETIF_F_LRO)
287 flags |= ETH_FLAG_LRO;
288 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
289 flags |= ETH_FLAG_RXVLAN;
290 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
291 flags |= ETH_FLAG_TXVLAN;
292 if (dev->features & NETIF_F_NTUPLE)
293 flags |= ETH_FLAG_NTUPLE;
294 if (dev->features & NETIF_F_RXHASH)
295 flags |= ETH_FLAG_RXHASH;
296
297 return flags;
298 }
299
300 static int __ethtool_set_flags(struct net_device *dev, u32 data)
301 {
302 netdev_features_t features = 0, changed;
303
304 if (data & ~ETH_ALL_FLAGS)
305 return -EINVAL;
306
307 if (data & ETH_FLAG_LRO)
308 features |= NETIF_F_LRO;
309 if (data & ETH_FLAG_RXVLAN)
310 features |= NETIF_F_HW_VLAN_CTAG_RX;
311 if (data & ETH_FLAG_TXVLAN)
312 features |= NETIF_F_HW_VLAN_CTAG_TX;
313 if (data & ETH_FLAG_NTUPLE)
314 features |= NETIF_F_NTUPLE;
315 if (data & ETH_FLAG_RXHASH)
316 features |= NETIF_F_RXHASH;
317
318 /* allow changing only bits set in hw_features */
319 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
320 if (changed & ~dev->hw_features)
321 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
322
323 dev->wanted_features =
324 (dev->wanted_features & ~changed) | (features & changed);
325
326 __netdev_update_features(dev);
327
328 return 0;
329 }
330
331 int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
332 {
333 ASSERT_RTNL();
334
335 if (!dev->ethtool_ops->get_settings)
336 return -EOPNOTSUPP;
337
338 memset(cmd, 0, sizeof(struct ethtool_cmd));
339 cmd->cmd = ETHTOOL_GSET;
340 return dev->ethtool_ops->get_settings(dev, cmd);
341 }
342 EXPORT_SYMBOL(__ethtool_get_settings);
343
344 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
345 {
346 int err;
347 struct ethtool_cmd cmd;
348
349 err = __ethtool_get_settings(dev, &cmd);
350 if (err < 0)
351 return err;
352
353 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
354 return -EFAULT;
355 return 0;
356 }
357
358 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
359 {
360 struct ethtool_cmd cmd;
361
362 if (!dev->ethtool_ops->set_settings)
363 return -EOPNOTSUPP;
364
365 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
366 return -EFAULT;
367
368 return dev->ethtool_ops->set_settings(dev, &cmd);
369 }
370
371 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
372 void __user *useraddr)
373 {
374 struct ethtool_drvinfo info;
375 const struct ethtool_ops *ops = dev->ethtool_ops;
376
377 memset(&info, 0, sizeof(info));
378 info.cmd = ETHTOOL_GDRVINFO;
379 if (ops->get_drvinfo) {
380 ops->get_drvinfo(dev, &info);
381 } else if (dev->dev.parent && dev->dev.parent->driver) {
382 strlcpy(info.bus_info, dev_name(dev->dev.parent),
383 sizeof(info.bus_info));
384 strlcpy(info.driver, dev->dev.parent->driver->name,
385 sizeof(info.driver));
386 } else {
387 return -EOPNOTSUPP;
388 }
389
390 /*
391 * this method of obtaining string set info is deprecated;
392 * Use ETHTOOL_GSSET_INFO instead.
393 */
394 if (ops->get_sset_count) {
395 int rc;
396
397 rc = ops->get_sset_count(dev, ETH_SS_TEST);
398 if (rc >= 0)
399 info.testinfo_len = rc;
400 rc = ops->get_sset_count(dev, ETH_SS_STATS);
401 if (rc >= 0)
402 info.n_stats = rc;
403 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
404 if (rc >= 0)
405 info.n_priv_flags = rc;
406 }
407 if (ops->get_regs_len)
408 info.regdump_len = ops->get_regs_len(dev);
409 if (ops->get_eeprom_len)
410 info.eedump_len = ops->get_eeprom_len(dev);
411
412 if (copy_to_user(useraddr, &info, sizeof(info)))
413 return -EFAULT;
414 return 0;
415 }
416
417 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
418 void __user *useraddr)
419 {
420 struct ethtool_sset_info info;
421 u64 sset_mask;
422 int i, idx = 0, n_bits = 0, ret, rc;
423 u32 *info_buf = NULL;
424
425 if (copy_from_user(&info, useraddr, sizeof(info)))
426 return -EFAULT;
427
428 /* store copy of mask, because we zero struct later on */
429 sset_mask = info.sset_mask;
430 if (!sset_mask)
431 return 0;
432
433 /* calculate size of return buffer */
434 n_bits = hweight64(sset_mask);
435
436 memset(&info, 0, sizeof(info));
437 info.cmd = ETHTOOL_GSSET_INFO;
438
439 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
440 if (!info_buf)
441 return -ENOMEM;
442
443 /*
444 * fill return buffer based on input bitmask and successful
445 * get_sset_count return
446 */
447 for (i = 0; i < 64; i++) {
448 if (!(sset_mask & (1ULL << i)))
449 continue;
450
451 rc = __ethtool_get_sset_count(dev, i);
452 if (rc >= 0) {
453 info.sset_mask |= (1ULL << i);
454 info_buf[idx++] = rc;
455 }
456 }
457
458 ret = -EFAULT;
459 if (copy_to_user(useraddr, &info, sizeof(info)))
460 goto out;
461
462 useraddr += offsetof(struct ethtool_sset_info, data);
463 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
464 goto out;
465
466 ret = 0;
467
468 out:
469 kfree(info_buf);
470 return ret;
471 }
472
473 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
474 u32 cmd, void __user *useraddr)
475 {
476 struct ethtool_rxnfc info;
477 size_t info_size = sizeof(info);
478 int rc;
479
480 if (!dev->ethtool_ops->set_rxnfc)
481 return -EOPNOTSUPP;
482
483 /* struct ethtool_rxnfc was originally defined for
484 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
485 * members. User-space might still be using that
486 * definition. */
487 if (cmd == ETHTOOL_SRXFH)
488 info_size = (offsetof(struct ethtool_rxnfc, data) +
489 sizeof(info.data));
490
491 if (copy_from_user(&info, useraddr, info_size))
492 return -EFAULT;
493
494 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
495 if (rc)
496 return rc;
497
498 if (cmd == ETHTOOL_SRXCLSRLINS &&
499 copy_to_user(useraddr, &info, info_size))
500 return -EFAULT;
501
502 return 0;
503 }
504
505 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
506 u32 cmd, void __user *useraddr)
507 {
508 struct ethtool_rxnfc info;
509 size_t info_size = sizeof(info);
510 const struct ethtool_ops *ops = dev->ethtool_ops;
511 int ret;
512 void *rule_buf = NULL;
513
514 if (!ops->get_rxnfc)
515 return -EOPNOTSUPP;
516
517 /* struct ethtool_rxnfc was originally defined for
518 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
519 * members. User-space might still be using that
520 * definition. */
521 if (cmd == ETHTOOL_GRXFH)
522 info_size = (offsetof(struct ethtool_rxnfc, data) +
523 sizeof(info.data));
524
525 if (copy_from_user(&info, useraddr, info_size))
526 return -EFAULT;
527
528 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
529 if (info.rule_cnt > 0) {
530 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
531 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
532 GFP_USER);
533 if (!rule_buf)
534 return -ENOMEM;
535 }
536 }
537
538 ret = ops->get_rxnfc(dev, &info, rule_buf);
539 if (ret < 0)
540 goto err_out;
541
542 ret = -EFAULT;
543 if (copy_to_user(useraddr, &info, info_size))
544 goto err_out;
545
546 if (rule_buf) {
547 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
548 if (copy_to_user(useraddr, rule_buf,
549 info.rule_cnt * sizeof(u32)))
550 goto err_out;
551 }
552 ret = 0;
553
554 err_out:
555 kfree(rule_buf);
556
557 return ret;
558 }
559
560 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
561 void __user *useraddr)
562 {
563 u32 user_size, dev_size;
564 u32 *indir;
565 int ret;
566
567 if (!dev->ethtool_ops->get_rxfh_indir_size ||
568 !dev->ethtool_ops->get_rxfh_indir)
569 return -EOPNOTSUPP;
570 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
571 if (dev_size == 0)
572 return -EOPNOTSUPP;
573
574 if (copy_from_user(&user_size,
575 useraddr + offsetof(struct ethtool_rxfh_indir, size),
576 sizeof(user_size)))
577 return -EFAULT;
578
579 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
580 &dev_size, sizeof(dev_size)))
581 return -EFAULT;
582
583 /* If the user buffer size is 0, this is just a query for the
584 * device table size. Otherwise, if it's smaller than the
585 * device table size it's an error.
586 */
587 if (user_size < dev_size)
588 return user_size == 0 ? 0 : -EINVAL;
589
590 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
591 if (!indir)
592 return -ENOMEM;
593
594 ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
595 if (ret)
596 goto out;
597
598 if (copy_to_user(useraddr +
599 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
600 indir, dev_size * sizeof(indir[0])))
601 ret = -EFAULT;
602
603 out:
604 kfree(indir);
605 return ret;
606 }
607
608 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
609 void __user *useraddr)
610 {
611 struct ethtool_rxnfc rx_rings;
612 u32 user_size, dev_size, i;
613 u32 *indir;
614 const struct ethtool_ops *ops = dev->ethtool_ops;
615 int ret;
616
617 if (!ops->get_rxfh_indir_size || !ops->set_rxfh_indir ||
618 !ops->get_rxnfc)
619 return -EOPNOTSUPP;
620
621 dev_size = ops->get_rxfh_indir_size(dev);
622 if (dev_size == 0)
623 return -EOPNOTSUPP;
624
625 if (copy_from_user(&user_size,
626 useraddr + offsetof(struct ethtool_rxfh_indir, size),
627 sizeof(user_size)))
628 return -EFAULT;
629
630 if (user_size != 0 && user_size != dev_size)
631 return -EINVAL;
632
633 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
634 if (!indir)
635 return -ENOMEM;
636
637 rx_rings.cmd = ETHTOOL_GRXRINGS;
638 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
639 if (ret)
640 goto out;
641
642 if (user_size == 0) {
643 for (i = 0; i < dev_size; i++)
644 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
645 } else {
646 if (copy_from_user(indir,
647 useraddr +
648 offsetof(struct ethtool_rxfh_indir,
649 ring_index[0]),
650 dev_size * sizeof(indir[0]))) {
651 ret = -EFAULT;
652 goto out;
653 }
654
655 /* Validate ring indices */
656 for (i = 0; i < dev_size; i++) {
657 if (indir[i] >= rx_rings.data) {
658 ret = -EINVAL;
659 goto out;
660 }
661 }
662 }
663
664 ret = ops->set_rxfh_indir(dev, indir);
665
666 out:
667 kfree(indir);
668 return ret;
669 }
670
671 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
672 {
673 struct ethtool_regs regs;
674 const struct ethtool_ops *ops = dev->ethtool_ops;
675 void *regbuf;
676 int reglen, ret;
677
678 if (!ops->get_regs || !ops->get_regs_len)
679 return -EOPNOTSUPP;
680
681 if (copy_from_user(&regs, useraddr, sizeof(regs)))
682 return -EFAULT;
683
684 reglen = ops->get_regs_len(dev);
685 if (regs.len > reglen)
686 regs.len = reglen;
687
688 regbuf = vzalloc(reglen);
689 if (reglen && !regbuf)
690 return -ENOMEM;
691
692 ops->get_regs(dev, &regs, regbuf);
693
694 ret = -EFAULT;
695 if (copy_to_user(useraddr, &regs, sizeof(regs)))
696 goto out;
697 useraddr += offsetof(struct ethtool_regs, data);
698 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
699 goto out;
700 ret = 0;
701
702 out:
703 vfree(regbuf);
704 return ret;
705 }
706
707 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
708 {
709 struct ethtool_value reset;
710 int ret;
711
712 if (!dev->ethtool_ops->reset)
713 return -EOPNOTSUPP;
714
715 if (copy_from_user(&reset, useraddr, sizeof(reset)))
716 return -EFAULT;
717
718 ret = dev->ethtool_ops->reset(dev, &reset.data);
719 if (ret)
720 return ret;
721
722 if (copy_to_user(useraddr, &reset, sizeof(reset)))
723 return -EFAULT;
724 return 0;
725 }
726
727 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
728 {
729 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
730
731 if (!dev->ethtool_ops->get_wol)
732 return -EOPNOTSUPP;
733
734 dev->ethtool_ops->get_wol(dev, &wol);
735
736 if (copy_to_user(useraddr, &wol, sizeof(wol)))
737 return -EFAULT;
738 return 0;
739 }
740
741 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
742 {
743 struct ethtool_wolinfo wol;
744
745 if (!dev->ethtool_ops->set_wol)
746 return -EOPNOTSUPP;
747
748 if (copy_from_user(&wol, useraddr, sizeof(wol)))
749 return -EFAULT;
750
751 return dev->ethtool_ops->set_wol(dev, &wol);
752 }
753
754 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
755 {
756 struct ethtool_eee edata;
757 int rc;
758
759 if (!dev->ethtool_ops->get_eee)
760 return -EOPNOTSUPP;
761
762 memset(&edata, 0, sizeof(struct ethtool_eee));
763 edata.cmd = ETHTOOL_GEEE;
764 rc = dev->ethtool_ops->get_eee(dev, &edata);
765
766 if (rc)
767 return rc;
768
769 if (copy_to_user(useraddr, &edata, sizeof(edata)))
770 return -EFAULT;
771
772 return 0;
773 }
774
775 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
776 {
777 struct ethtool_eee edata;
778
779 if (!dev->ethtool_ops->set_eee)
780 return -EOPNOTSUPP;
781
782 if (copy_from_user(&edata, useraddr, sizeof(edata)))
783 return -EFAULT;
784
785 return dev->ethtool_ops->set_eee(dev, &edata);
786 }
787
788 static int ethtool_nway_reset(struct net_device *dev)
789 {
790 if (!dev->ethtool_ops->nway_reset)
791 return -EOPNOTSUPP;
792
793 return dev->ethtool_ops->nway_reset(dev);
794 }
795
796 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
797 {
798 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
799
800 if (!dev->ethtool_ops->get_link)
801 return -EOPNOTSUPP;
802
803 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
804
805 if (copy_to_user(useraddr, &edata, sizeof(edata)))
806 return -EFAULT;
807 return 0;
808 }
809
810 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
811 int (*getter)(struct net_device *,
812 struct ethtool_eeprom *, u8 *),
813 u32 total_len)
814 {
815 struct ethtool_eeprom eeprom;
816 void __user *userbuf = useraddr + sizeof(eeprom);
817 u32 bytes_remaining;
818 u8 *data;
819 int ret = 0;
820
821 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
822 return -EFAULT;
823
824 /* Check for wrap and zero */
825 if (eeprom.offset + eeprom.len <= eeprom.offset)
826 return -EINVAL;
827
828 /* Check for exceeding total eeprom len */
829 if (eeprom.offset + eeprom.len > total_len)
830 return -EINVAL;
831
832 data = kmalloc(PAGE_SIZE, GFP_USER);
833 if (!data)
834 return -ENOMEM;
835
836 bytes_remaining = eeprom.len;
837 while (bytes_remaining > 0) {
838 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
839
840 ret = getter(dev, &eeprom, data);
841 if (ret)
842 break;
843 if (copy_to_user(userbuf, data, eeprom.len)) {
844 ret = -EFAULT;
845 break;
846 }
847 userbuf += eeprom.len;
848 eeprom.offset += eeprom.len;
849 bytes_remaining -= eeprom.len;
850 }
851
852 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
853 eeprom.offset -= eeprom.len;
854 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
855 ret = -EFAULT;
856
857 kfree(data);
858 return ret;
859 }
860
861 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
862 {
863 const struct ethtool_ops *ops = dev->ethtool_ops;
864
865 if (!ops->get_eeprom || !ops->get_eeprom_len)
866 return -EOPNOTSUPP;
867
868 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
869 ops->get_eeprom_len(dev));
870 }
871
872 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
873 {
874 struct ethtool_eeprom eeprom;
875 const struct ethtool_ops *ops = dev->ethtool_ops;
876 void __user *userbuf = useraddr + sizeof(eeprom);
877 u32 bytes_remaining;
878 u8 *data;
879 int ret = 0;
880
881 if (!ops->set_eeprom || !ops->get_eeprom_len)
882 return -EOPNOTSUPP;
883
884 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
885 return -EFAULT;
886
887 /* Check for wrap and zero */
888 if (eeprom.offset + eeprom.len <= eeprom.offset)
889 return -EINVAL;
890
891 /* Check for exceeding total eeprom len */
892 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
893 return -EINVAL;
894
895 data = kmalloc(PAGE_SIZE, GFP_USER);
896 if (!data)
897 return -ENOMEM;
898
899 bytes_remaining = eeprom.len;
900 while (bytes_remaining > 0) {
901 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
902
903 if (copy_from_user(data, userbuf, eeprom.len)) {
904 ret = -EFAULT;
905 break;
906 }
907 ret = ops->set_eeprom(dev, &eeprom, data);
908 if (ret)
909 break;
910 userbuf += eeprom.len;
911 eeprom.offset += eeprom.len;
912 bytes_remaining -= eeprom.len;
913 }
914
915 kfree(data);
916 return ret;
917 }
918
919 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
920 void __user *useraddr)
921 {
922 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
923
924 if (!dev->ethtool_ops->get_coalesce)
925 return -EOPNOTSUPP;
926
927 dev->ethtool_ops->get_coalesce(dev, &coalesce);
928
929 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
930 return -EFAULT;
931 return 0;
932 }
933
934 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
935 void __user *useraddr)
936 {
937 struct ethtool_coalesce coalesce;
938
939 if (!dev->ethtool_ops->set_coalesce)
940 return -EOPNOTSUPP;
941
942 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
943 return -EFAULT;
944
945 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
946 }
947
948 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
949 {
950 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
951
952 if (!dev->ethtool_ops->get_ringparam)
953 return -EOPNOTSUPP;
954
955 dev->ethtool_ops->get_ringparam(dev, &ringparam);
956
957 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
958 return -EFAULT;
959 return 0;
960 }
961
962 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
963 {
964 struct ethtool_ringparam ringparam;
965
966 if (!dev->ethtool_ops->set_ringparam)
967 return -EOPNOTSUPP;
968
969 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
970 return -EFAULT;
971
972 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
973 }
974
975 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
976 void __user *useraddr)
977 {
978 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
979
980 if (!dev->ethtool_ops->get_channels)
981 return -EOPNOTSUPP;
982
983 dev->ethtool_ops->get_channels(dev, &channels);
984
985 if (copy_to_user(useraddr, &channels, sizeof(channels)))
986 return -EFAULT;
987 return 0;
988 }
989
990 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
991 void __user *useraddr)
992 {
993 struct ethtool_channels channels;
994
995 if (!dev->ethtool_ops->set_channels)
996 return -EOPNOTSUPP;
997
998 if (copy_from_user(&channels, useraddr, sizeof(channels)))
999 return -EFAULT;
1000
1001 return dev->ethtool_ops->set_channels(dev, &channels);
1002 }
1003
1004 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1005 {
1006 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1007
1008 if (!dev->ethtool_ops->get_pauseparam)
1009 return -EOPNOTSUPP;
1010
1011 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1012
1013 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1014 return -EFAULT;
1015 return 0;
1016 }
1017
1018 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1019 {
1020 struct ethtool_pauseparam pauseparam;
1021
1022 if (!dev->ethtool_ops->set_pauseparam)
1023 return -EOPNOTSUPP;
1024
1025 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1026 return -EFAULT;
1027
1028 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1029 }
1030
1031 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1032 {
1033 struct ethtool_test test;
1034 const struct ethtool_ops *ops = dev->ethtool_ops;
1035 u64 *data;
1036 int ret, test_len;
1037
1038 if (!ops->self_test || !ops->get_sset_count)
1039 return -EOPNOTSUPP;
1040
1041 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1042 if (test_len < 0)
1043 return test_len;
1044 WARN_ON(test_len == 0);
1045
1046 if (copy_from_user(&test, useraddr, sizeof(test)))
1047 return -EFAULT;
1048
1049 test.len = test_len;
1050 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1051 if (!data)
1052 return -ENOMEM;
1053
1054 ops->self_test(dev, &test, data);
1055
1056 ret = -EFAULT;
1057 if (copy_to_user(useraddr, &test, sizeof(test)))
1058 goto out;
1059 useraddr += sizeof(test);
1060 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1061 goto out;
1062 ret = 0;
1063
1064 out:
1065 kfree(data);
1066 return ret;
1067 }
1068
1069 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1070 {
1071 struct ethtool_gstrings gstrings;
1072 u8 *data;
1073 int ret;
1074
1075 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1076 return -EFAULT;
1077
1078 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1079 if (ret < 0)
1080 return ret;
1081
1082 gstrings.len = ret;
1083
1084 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1085 if (!data)
1086 return -ENOMEM;
1087
1088 __ethtool_get_strings(dev, gstrings.string_set, data);
1089
1090 ret = -EFAULT;
1091 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1092 goto out;
1093 useraddr += sizeof(gstrings);
1094 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1095 goto out;
1096 ret = 0;
1097
1098 out:
1099 kfree(data);
1100 return ret;
1101 }
1102
1103 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1104 {
1105 struct ethtool_value id;
1106 static bool busy;
1107 const struct ethtool_ops *ops = dev->ethtool_ops;
1108 int rc;
1109
1110 if (!ops->set_phys_id)
1111 return -EOPNOTSUPP;
1112
1113 if (busy)
1114 return -EBUSY;
1115
1116 if (copy_from_user(&id, useraddr, sizeof(id)))
1117 return -EFAULT;
1118
1119 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1120 if (rc < 0)
1121 return rc;
1122
1123 /* Drop the RTNL lock while waiting, but prevent reentry or
1124 * removal of the device.
1125 */
1126 busy = true;
1127 dev_hold(dev);
1128 rtnl_unlock();
1129
1130 if (rc == 0) {
1131 /* Driver will handle this itself */
1132 schedule_timeout_interruptible(
1133 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1134 } else {
1135 /* Driver expects to be called at twice the frequency in rc */
1136 int n = rc * 2, i, interval = HZ / n;
1137
1138 /* Count down seconds */
1139 do {
1140 /* Count down iterations per second */
1141 i = n;
1142 do {
1143 rtnl_lock();
1144 rc = ops->set_phys_id(dev,
1145 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1146 rtnl_unlock();
1147 if (rc)
1148 break;
1149 schedule_timeout_interruptible(interval);
1150 } while (!signal_pending(current) && --i != 0);
1151 } while (!signal_pending(current) &&
1152 (id.data == 0 || --id.data != 0));
1153 }
1154
1155 rtnl_lock();
1156 dev_put(dev);
1157 busy = false;
1158
1159 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1160 return rc;
1161 }
1162
1163 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1164 {
1165 struct ethtool_stats stats;
1166 const struct ethtool_ops *ops = dev->ethtool_ops;
1167 u64 *data;
1168 int ret, n_stats;
1169
1170 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1171 return -EOPNOTSUPP;
1172
1173 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1174 if (n_stats < 0)
1175 return n_stats;
1176 WARN_ON(n_stats == 0);
1177
1178 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1179 return -EFAULT;
1180
1181 stats.n_stats = n_stats;
1182 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1183 if (!data)
1184 return -ENOMEM;
1185
1186 ops->get_ethtool_stats(dev, &stats, data);
1187
1188 ret = -EFAULT;
1189 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1190 goto out;
1191 useraddr += sizeof(stats);
1192 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1193 goto out;
1194 ret = 0;
1195
1196 out:
1197 kfree(data);
1198 return ret;
1199 }
1200
1201 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1202 {
1203 struct ethtool_perm_addr epaddr;
1204
1205 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1206 return -EFAULT;
1207
1208 if (epaddr.size < dev->addr_len)
1209 return -ETOOSMALL;
1210 epaddr.size = dev->addr_len;
1211
1212 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1213 return -EFAULT;
1214 useraddr += sizeof(epaddr);
1215 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1216 return -EFAULT;
1217 return 0;
1218 }
1219
1220 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1221 u32 cmd, u32 (*actor)(struct net_device *))
1222 {
1223 struct ethtool_value edata = { .cmd = cmd };
1224
1225 if (!actor)
1226 return -EOPNOTSUPP;
1227
1228 edata.data = actor(dev);
1229
1230 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1231 return -EFAULT;
1232 return 0;
1233 }
1234
1235 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1236 void (*actor)(struct net_device *, u32))
1237 {
1238 struct ethtool_value edata;
1239
1240 if (!actor)
1241 return -EOPNOTSUPP;
1242
1243 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1244 return -EFAULT;
1245
1246 actor(dev, edata.data);
1247 return 0;
1248 }
1249
1250 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1251 int (*actor)(struct net_device *, u32))
1252 {
1253 struct ethtool_value edata;
1254
1255 if (!actor)
1256 return -EOPNOTSUPP;
1257
1258 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1259 return -EFAULT;
1260
1261 return actor(dev, edata.data);
1262 }
1263
1264 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1265 char __user *useraddr)
1266 {
1267 struct ethtool_flash efl;
1268
1269 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1270 return -EFAULT;
1271
1272 if (!dev->ethtool_ops->flash_device)
1273 return -EOPNOTSUPP;
1274
1275 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
1276
1277 return dev->ethtool_ops->flash_device(dev, &efl);
1278 }
1279
1280 static int ethtool_set_dump(struct net_device *dev,
1281 void __user *useraddr)
1282 {
1283 struct ethtool_dump dump;
1284
1285 if (!dev->ethtool_ops->set_dump)
1286 return -EOPNOTSUPP;
1287
1288 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1289 return -EFAULT;
1290
1291 return dev->ethtool_ops->set_dump(dev, &dump);
1292 }
1293
1294 static int ethtool_get_dump_flag(struct net_device *dev,
1295 void __user *useraddr)
1296 {
1297 int ret;
1298 struct ethtool_dump dump;
1299 const struct ethtool_ops *ops = dev->ethtool_ops;
1300
1301 if (!ops->get_dump_flag)
1302 return -EOPNOTSUPP;
1303
1304 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1305 return -EFAULT;
1306
1307 ret = ops->get_dump_flag(dev, &dump);
1308 if (ret)
1309 return ret;
1310
1311 if (copy_to_user(useraddr, &dump, sizeof(dump)))
1312 return -EFAULT;
1313 return 0;
1314 }
1315
1316 static int ethtool_get_dump_data(struct net_device *dev,
1317 void __user *useraddr)
1318 {
1319 int ret;
1320 __u32 len;
1321 struct ethtool_dump dump, tmp;
1322 const struct ethtool_ops *ops = dev->ethtool_ops;
1323 void *data = NULL;
1324
1325 if (!ops->get_dump_data || !ops->get_dump_flag)
1326 return -EOPNOTSUPP;
1327
1328 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1329 return -EFAULT;
1330
1331 memset(&tmp, 0, sizeof(tmp));
1332 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
1333 ret = ops->get_dump_flag(dev, &tmp);
1334 if (ret)
1335 return ret;
1336
1337 len = min(tmp.len, dump.len);
1338 if (!len)
1339 return -EFAULT;
1340
1341 /* Don't ever let the driver think there's more space available
1342 * than it requested with .get_dump_flag().
1343 */
1344 dump.len = len;
1345
1346 /* Always allocate enough space to hold the whole thing so that the
1347 * driver does not need to check the length and bother with partial
1348 * dumping.
1349 */
1350 data = vzalloc(tmp.len);
1351 if (!data)
1352 return -ENOMEM;
1353 ret = ops->get_dump_data(dev, &dump, data);
1354 if (ret)
1355 goto out;
1356
1357 /* There are two sane possibilities:
1358 * 1. The driver's .get_dump_data() does not touch dump.len.
1359 * 2. Or it may set dump.len to how much it really writes, which
1360 * should be tmp.len (or len if it can do a partial dump).
1361 * In any case respond to userspace with the actual length of data
1362 * it's receiving.
1363 */
1364 WARN_ON(dump.len != len && dump.len != tmp.len);
1365 dump.len = len;
1366
1367 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
1368 ret = -EFAULT;
1369 goto out;
1370 }
1371 useraddr += offsetof(struct ethtool_dump, data);
1372 if (copy_to_user(useraddr, data, len))
1373 ret = -EFAULT;
1374 out:
1375 vfree(data);
1376 return ret;
1377 }
1378
1379 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
1380 {
1381 int err = 0;
1382 struct ethtool_ts_info info;
1383 const struct ethtool_ops *ops = dev->ethtool_ops;
1384 struct phy_device *phydev = dev->phydev;
1385
1386 memset(&info, 0, sizeof(info));
1387 info.cmd = ETHTOOL_GET_TS_INFO;
1388
1389 if (phydev && phydev->drv && phydev->drv->ts_info) {
1390 err = phydev->drv->ts_info(phydev, &info);
1391 } else if (ops->get_ts_info) {
1392 err = ops->get_ts_info(dev, &info);
1393 } else {
1394 info.so_timestamping =
1395 SOF_TIMESTAMPING_RX_SOFTWARE |
1396 SOF_TIMESTAMPING_SOFTWARE;
1397 info.phc_index = -1;
1398 }
1399
1400 if (err)
1401 return err;
1402
1403 if (copy_to_user(useraddr, &info, sizeof(info)))
1404 err = -EFAULT;
1405
1406 return err;
1407 }
1408
1409 static int ethtool_get_module_info(struct net_device *dev,
1410 void __user *useraddr)
1411 {
1412 int ret;
1413 struct ethtool_modinfo modinfo;
1414 const struct ethtool_ops *ops = dev->ethtool_ops;
1415
1416 if (!ops->get_module_info)
1417 return -EOPNOTSUPP;
1418
1419 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
1420 return -EFAULT;
1421
1422 ret = ops->get_module_info(dev, &modinfo);
1423 if (ret)
1424 return ret;
1425
1426 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
1427 return -EFAULT;
1428
1429 return 0;
1430 }
1431
1432 static int ethtool_get_module_eeprom(struct net_device *dev,
1433 void __user *useraddr)
1434 {
1435 int ret;
1436 struct ethtool_modinfo modinfo;
1437 const struct ethtool_ops *ops = dev->ethtool_ops;
1438
1439 if (!ops->get_module_info || !ops->get_module_eeprom)
1440 return -EOPNOTSUPP;
1441
1442 ret = ops->get_module_info(dev, &modinfo);
1443 if (ret)
1444 return ret;
1445
1446 return ethtool_get_any_eeprom(dev, useraddr, ops->get_module_eeprom,
1447 modinfo.eeprom_len);
1448 }
1449
1450 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
1451
1452 int dev_ethtool(struct net *net, struct ifreq *ifr)
1453 {
1454 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1455 void __user *useraddr = ifr->ifr_data;
1456 u32 ethcmd;
1457 int rc;
1458 netdev_features_t old_features;
1459
1460 if (!dev || !netif_device_present(dev))
1461 return -ENODEV;
1462
1463 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1464 return -EFAULT;
1465
1466 /* Allow some commands to be done by anyone */
1467 switch (ethcmd) {
1468 case ETHTOOL_GSET:
1469 case ETHTOOL_GDRVINFO:
1470 case ETHTOOL_GMSGLVL:
1471 case ETHTOOL_GLINK:
1472 case ETHTOOL_GCOALESCE:
1473 case ETHTOOL_GRINGPARAM:
1474 case ETHTOOL_GPAUSEPARAM:
1475 case ETHTOOL_GRXCSUM:
1476 case ETHTOOL_GTXCSUM:
1477 case ETHTOOL_GSG:
1478 case ETHTOOL_GSSET_INFO:
1479 case ETHTOOL_GSTRINGS:
1480 case ETHTOOL_GSTATS:
1481 case ETHTOOL_GTSO:
1482 case ETHTOOL_GPERMADDR:
1483 case ETHTOOL_GUFO:
1484 case ETHTOOL_GGSO:
1485 case ETHTOOL_GGRO:
1486 case ETHTOOL_GFLAGS:
1487 case ETHTOOL_GPFLAGS:
1488 case ETHTOOL_GRXFH:
1489 case ETHTOOL_GRXRINGS:
1490 case ETHTOOL_GRXCLSRLCNT:
1491 case ETHTOOL_GRXCLSRULE:
1492 case ETHTOOL_GRXCLSRLALL:
1493 case ETHTOOL_GRXFHINDIR:
1494 case ETHTOOL_GFEATURES:
1495 case ETHTOOL_GCHANNELS:
1496 case ETHTOOL_GET_TS_INFO:
1497 case ETHTOOL_GEEE:
1498 break;
1499 default:
1500 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1501 return -EPERM;
1502 }
1503
1504 if (dev->ethtool_ops->begin) {
1505 rc = dev->ethtool_ops->begin(dev);
1506 if (rc < 0)
1507 return rc;
1508 }
1509 old_features = dev->features;
1510
1511 switch (ethcmd) {
1512 case ETHTOOL_GSET:
1513 rc = ethtool_get_settings(dev, useraddr);
1514 break;
1515 case ETHTOOL_SSET:
1516 rc = ethtool_set_settings(dev, useraddr);
1517 break;
1518 case ETHTOOL_GDRVINFO:
1519 rc = ethtool_get_drvinfo(dev, useraddr);
1520 break;
1521 case ETHTOOL_GREGS:
1522 rc = ethtool_get_regs(dev, useraddr);
1523 break;
1524 case ETHTOOL_GWOL:
1525 rc = ethtool_get_wol(dev, useraddr);
1526 break;
1527 case ETHTOOL_SWOL:
1528 rc = ethtool_set_wol(dev, useraddr);
1529 break;
1530 case ETHTOOL_GMSGLVL:
1531 rc = ethtool_get_value(dev, useraddr, ethcmd,
1532 dev->ethtool_ops->get_msglevel);
1533 break;
1534 case ETHTOOL_SMSGLVL:
1535 rc = ethtool_set_value_void(dev, useraddr,
1536 dev->ethtool_ops->set_msglevel);
1537 break;
1538 case ETHTOOL_GEEE:
1539 rc = ethtool_get_eee(dev, useraddr);
1540 break;
1541 case ETHTOOL_SEEE:
1542 rc = ethtool_set_eee(dev, useraddr);
1543 break;
1544 case ETHTOOL_NWAY_RST:
1545 rc = ethtool_nway_reset(dev);
1546 break;
1547 case ETHTOOL_GLINK:
1548 rc = ethtool_get_link(dev, useraddr);
1549 break;
1550 case ETHTOOL_GEEPROM:
1551 rc = ethtool_get_eeprom(dev, useraddr);
1552 break;
1553 case ETHTOOL_SEEPROM:
1554 rc = ethtool_set_eeprom(dev, useraddr);
1555 break;
1556 case ETHTOOL_GCOALESCE:
1557 rc = ethtool_get_coalesce(dev, useraddr);
1558 break;
1559 case ETHTOOL_SCOALESCE:
1560 rc = ethtool_set_coalesce(dev, useraddr);
1561 break;
1562 case ETHTOOL_GRINGPARAM:
1563 rc = ethtool_get_ringparam(dev, useraddr);
1564 break;
1565 case ETHTOOL_SRINGPARAM:
1566 rc = ethtool_set_ringparam(dev, useraddr);
1567 break;
1568 case ETHTOOL_GPAUSEPARAM:
1569 rc = ethtool_get_pauseparam(dev, useraddr);
1570 break;
1571 case ETHTOOL_SPAUSEPARAM:
1572 rc = ethtool_set_pauseparam(dev, useraddr);
1573 break;
1574 case ETHTOOL_TEST:
1575 rc = ethtool_self_test(dev, useraddr);
1576 break;
1577 case ETHTOOL_GSTRINGS:
1578 rc = ethtool_get_strings(dev, useraddr);
1579 break;
1580 case ETHTOOL_PHYS_ID:
1581 rc = ethtool_phys_id(dev, useraddr);
1582 break;
1583 case ETHTOOL_GSTATS:
1584 rc = ethtool_get_stats(dev, useraddr);
1585 break;
1586 case ETHTOOL_GPERMADDR:
1587 rc = ethtool_get_perm_addr(dev, useraddr);
1588 break;
1589 case ETHTOOL_GFLAGS:
1590 rc = ethtool_get_value(dev, useraddr, ethcmd,
1591 __ethtool_get_flags);
1592 break;
1593 case ETHTOOL_SFLAGS:
1594 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
1595 break;
1596 case ETHTOOL_GPFLAGS:
1597 rc = ethtool_get_value(dev, useraddr, ethcmd,
1598 dev->ethtool_ops->get_priv_flags);
1599 break;
1600 case ETHTOOL_SPFLAGS:
1601 rc = ethtool_set_value(dev, useraddr,
1602 dev->ethtool_ops->set_priv_flags);
1603 break;
1604 case ETHTOOL_GRXFH:
1605 case ETHTOOL_GRXRINGS:
1606 case ETHTOOL_GRXCLSRLCNT:
1607 case ETHTOOL_GRXCLSRULE:
1608 case ETHTOOL_GRXCLSRLALL:
1609 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1610 break;
1611 case ETHTOOL_SRXFH:
1612 case ETHTOOL_SRXCLSRLDEL:
1613 case ETHTOOL_SRXCLSRLINS:
1614 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1615 break;
1616 case ETHTOOL_FLASHDEV:
1617 rc = ethtool_flash_device(dev, useraddr);
1618 break;
1619 case ETHTOOL_RESET:
1620 rc = ethtool_reset(dev, useraddr);
1621 break;
1622 case ETHTOOL_GSSET_INFO:
1623 rc = ethtool_get_sset_info(dev, useraddr);
1624 break;
1625 case ETHTOOL_GRXFHINDIR:
1626 rc = ethtool_get_rxfh_indir(dev, useraddr);
1627 break;
1628 case ETHTOOL_SRXFHINDIR:
1629 rc = ethtool_set_rxfh_indir(dev, useraddr);
1630 break;
1631 case ETHTOOL_GFEATURES:
1632 rc = ethtool_get_features(dev, useraddr);
1633 break;
1634 case ETHTOOL_SFEATURES:
1635 rc = ethtool_set_features(dev, useraddr);
1636 break;
1637 case ETHTOOL_GTXCSUM:
1638 case ETHTOOL_GRXCSUM:
1639 case ETHTOOL_GSG:
1640 case ETHTOOL_GTSO:
1641 case ETHTOOL_GUFO:
1642 case ETHTOOL_GGSO:
1643 case ETHTOOL_GGRO:
1644 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
1645 break;
1646 case ETHTOOL_STXCSUM:
1647 case ETHTOOL_SRXCSUM:
1648 case ETHTOOL_SSG:
1649 case ETHTOOL_STSO:
1650 case ETHTOOL_SUFO:
1651 case ETHTOOL_SGSO:
1652 case ETHTOOL_SGRO:
1653 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
1654 break;
1655 case ETHTOOL_GCHANNELS:
1656 rc = ethtool_get_channels(dev, useraddr);
1657 break;
1658 case ETHTOOL_SCHANNELS:
1659 rc = ethtool_set_channels(dev, useraddr);
1660 break;
1661 case ETHTOOL_SET_DUMP:
1662 rc = ethtool_set_dump(dev, useraddr);
1663 break;
1664 case ETHTOOL_GET_DUMP_FLAG:
1665 rc = ethtool_get_dump_flag(dev, useraddr);
1666 break;
1667 case ETHTOOL_GET_DUMP_DATA:
1668 rc = ethtool_get_dump_data(dev, useraddr);
1669 break;
1670 case ETHTOOL_GET_TS_INFO:
1671 rc = ethtool_get_ts_info(dev, useraddr);
1672 break;
1673 case ETHTOOL_GMODULEINFO:
1674 rc = ethtool_get_module_info(dev, useraddr);
1675 break;
1676 case ETHTOOL_GMODULEEEPROM:
1677 rc = ethtool_get_module_eeprom(dev, useraddr);
1678 break;
1679 default:
1680 rc = -EOPNOTSUPP;
1681 }
1682
1683 if (dev->ethtool_ops->complete)
1684 dev->ethtool_ops->complete(dev);
1685
1686 if (old_features != dev->features)
1687 netdev_features_change(dev);
1688
1689 return rc;
1690 }
Linux kernel - Deliverables
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