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c834cb29f68216aa701f3d1c9e7bf764ec22946b
[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 int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
561 struct ethtool_rxnfc *rx_rings,
562 u32 size)
563 {
564 int i;
565
566 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
567 return -EFAULT;
568
569 /* Validate ring indices */
570 for (i = 0; i < size; i++)
571 if (indir[i] >= rx_rings->data)
572 return -EINVAL;
573
574 return 0;
575 }
576
577 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
578 void __user *useraddr)
579 {
580 u32 user_size, dev_size;
581 u32 *indir;
582 int ret;
583
584 if (!dev->ethtool_ops->get_rxfh_indir_size ||
585 !dev->ethtool_ops->get_rxfh_indir)
586 return -EOPNOTSUPP;
587 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
588 if (dev_size == 0)
589 return -EOPNOTSUPP;
590
591 if (copy_from_user(&user_size,
592 useraddr + offsetof(struct ethtool_rxfh_indir, size),
593 sizeof(user_size)))
594 return -EFAULT;
595
596 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
597 &dev_size, sizeof(dev_size)))
598 return -EFAULT;
599
600 /* If the user buffer size is 0, this is just a query for the
601 * device table size. Otherwise, if it's smaller than the
602 * device table size it's an error.
603 */
604 if (user_size < dev_size)
605 return user_size == 0 ? 0 : -EINVAL;
606
607 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
608 if (!indir)
609 return -ENOMEM;
610
611 ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
612 if (ret)
613 goto out;
614
615 if (copy_to_user(useraddr +
616 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
617 indir, dev_size * sizeof(indir[0])))
618 ret = -EFAULT;
619
620 out:
621 kfree(indir);
622 return ret;
623 }
624
625 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
626 void __user *useraddr)
627 {
628 struct ethtool_rxnfc rx_rings;
629 u32 user_size, dev_size, i;
630 u32 *indir;
631 const struct ethtool_ops *ops = dev->ethtool_ops;
632 int ret;
633 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
634
635 if (!ops->get_rxfh_indir_size || !ops->set_rxfh_indir ||
636 !ops->get_rxnfc)
637 return -EOPNOTSUPP;
638
639 dev_size = ops->get_rxfh_indir_size(dev);
640 if (dev_size == 0)
641 return -EOPNOTSUPP;
642
643 if (copy_from_user(&user_size,
644 useraddr + offsetof(struct ethtool_rxfh_indir, size),
645 sizeof(user_size)))
646 return -EFAULT;
647
648 if (user_size != 0 && user_size != dev_size)
649 return -EINVAL;
650
651 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
652 if (!indir)
653 return -ENOMEM;
654
655 rx_rings.cmd = ETHTOOL_GRXRINGS;
656 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
657 if (ret)
658 goto out;
659
660 if (user_size == 0) {
661 for (i = 0; i < dev_size; i++)
662 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
663 } else {
664 ret = ethtool_copy_validate_indir(indir,
665 useraddr + ringidx_offset,
666 &rx_rings,
667 dev_size);
668 if (ret)
669 goto out;
670 }
671
672 ret = ops->set_rxfh_indir(dev, indir);
673
674 out:
675 kfree(indir);
676 return ret;
677 }
678
679 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
680 void __user *useraddr)
681 {
682 int ret;
683 const struct ethtool_ops *ops = dev->ethtool_ops;
684 u32 user_indir_size = 0, user_key_size = 0;
685 u32 dev_indir_size = 0, dev_key_size = 0;
686 u32 total_size;
687 u32 indir_offset, indir_bytes;
688 u32 key_offset;
689 u32 *indir = NULL;
690 u8 *hkey = NULL;
691 u8 *rss_config;
692
693 if (!(dev->ethtool_ops->get_rxfh_indir_size ||
694 dev->ethtool_ops->get_rxfh_key_size) ||
695 !dev->ethtool_ops->get_rxfh)
696 return -EOPNOTSUPP;
697
698 if (ops->get_rxfh_indir_size)
699 dev_indir_size = ops->get_rxfh_indir_size(dev);
700
701 indir_offset = offsetof(struct ethtool_rxfh, indir_size);
702
703 if (copy_from_user(&user_indir_size,
704 useraddr + indir_offset,
705 sizeof(user_indir_size)))
706 return -EFAULT;
707
708 if (copy_to_user(useraddr + indir_offset,
709 &dev_indir_size, sizeof(dev_indir_size)))
710 return -EFAULT;
711
712 if (ops->get_rxfh_key_size)
713 dev_key_size = ops->get_rxfh_key_size(dev);
714
715 if ((dev_key_size + dev_indir_size) == 0)
716 return -EOPNOTSUPP;
717
718 key_offset = offsetof(struct ethtool_rxfh, key_size);
719
720 if (copy_from_user(&user_key_size,
721 useraddr + key_offset,
722 sizeof(user_key_size)))
723 return -EFAULT;
724
725 if (copy_to_user(useraddr + key_offset,
726 &dev_key_size, sizeof(dev_key_size)))
727 return -EFAULT;
728
729 /* If the user buffer size is 0, this is just a query for the
730 * device table size and key size. Otherwise, if the User size is
731 * not equal to device table size or key size it's an error.
732 */
733 if (!user_indir_size && !user_key_size)
734 return 0;
735
736 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
737 (user_key_size && (user_key_size != dev_key_size)))
738 return -EINVAL;
739
740 indir_bytes = user_indir_size * sizeof(indir[0]);
741 total_size = indir_bytes + user_key_size;
742 rss_config = kzalloc(total_size, GFP_USER);
743 if (!rss_config)
744 return -ENOMEM;
745
746 if (user_indir_size)
747 indir = (u32 *)rss_config;
748
749 if (user_key_size)
750 hkey = rss_config + indir_bytes;
751
752 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey);
753 if (!ret) {
754 if (copy_to_user(useraddr +
755 offsetof(struct ethtool_rxfh, rss_config[0]),
756 rss_config, total_size))
757 ret = -EFAULT;
758 }
759
760 kfree(rss_config);
761
762 return ret;
763 }
764
765 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
766 void __user *useraddr)
767 {
768 int ret;
769 const struct ethtool_ops *ops = dev->ethtool_ops;
770 struct ethtool_rxnfc rx_rings;
771 u32 user_indir_size = 0, dev_indir_size = 0, i;
772 u32 user_key_size = 0, dev_key_size = 0;
773 u32 *indir = NULL, indir_bytes = 0;
774 u8 *hkey = NULL;
775 u8 *rss_config;
776 u32 indir_offset, key_offset;
777 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
778
779 if (!(ops->get_rxfh_indir_size || ops->get_rxfh_key_size) ||
780 !ops->get_rxnfc || !ops->set_rxfh)
781 return -EOPNOTSUPP;
782
783 if (ops->get_rxfh_indir_size)
784 dev_indir_size = ops->get_rxfh_indir_size(dev);
785
786 indir_offset = offsetof(struct ethtool_rxfh, indir_size);
787 if (copy_from_user(&user_indir_size,
788 useraddr + indir_offset,
789 sizeof(user_indir_size)))
790 return -EFAULT;
791
792 if (ops->get_rxfh_key_size)
793 dev_key_size = dev->ethtool_ops->get_rxfh_key_size(dev);
794
795 if ((dev_key_size + dev_indir_size) == 0)
796 return -EOPNOTSUPP;
797
798 key_offset = offsetof(struct ethtool_rxfh, key_size);
799 if (copy_from_user(&user_key_size,
800 useraddr + key_offset,
801 sizeof(user_key_size)))
802 return -EFAULT;
803
804 /* If either indir or hash key is valid, proceed further.
805 */
806 if ((user_indir_size && ((user_indir_size != 0xDEADBEEF) &&
807 user_indir_size != dev_indir_size)) ||
808 (user_key_size && (user_key_size != dev_key_size)))
809 return -EINVAL;
810
811 if (user_indir_size != 0xDEADBEEF)
812 indir_bytes = dev_indir_size * sizeof(indir[0]);
813
814 rss_config = kzalloc(indir_bytes + user_key_size, GFP_USER);
815 if (!rss_config)
816 return -ENOMEM;
817
818 rx_rings.cmd = ETHTOOL_GRXRINGS;
819 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
820 if (ret)
821 goto out;
822
823 /* user_indir_size == 0 means reset the indir table to default.
824 * user_indir_size == 0xDEADBEEF means indir setting is not requested.
825 */
826 if (user_indir_size && user_indir_size != 0xDEADBEEF) {
827 indir = (u32 *)rss_config;
828 ret = ethtool_copy_validate_indir(indir,
829 useraddr + rss_cfg_offset,
830 &rx_rings,
831 user_indir_size);
832 if (ret)
833 goto out;
834 } else if (user_indir_size == 0) {
835 indir = (u32 *)rss_config;
836 for (i = 0; i < dev_indir_size; i++)
837 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
838 }
839
840 if (user_key_size) {
841 hkey = rss_config + indir_bytes;
842 if (copy_from_user(hkey,
843 useraddr + rss_cfg_offset + indir_bytes,
844 user_key_size)) {
845 ret = -EFAULT;
846 goto out;
847 }
848 }
849
850 ret = ops->set_rxfh(dev, indir, hkey);
851
852 out:
853 kfree(rss_config);
854 return ret;
855 }
856
857 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
858 {
859 struct ethtool_regs regs;
860 const struct ethtool_ops *ops = dev->ethtool_ops;
861 void *regbuf;
862 int reglen, ret;
863
864 if (!ops->get_regs || !ops->get_regs_len)
865 return -EOPNOTSUPP;
866
867 if (copy_from_user(&regs, useraddr, sizeof(regs)))
868 return -EFAULT;
869
870 reglen = ops->get_regs_len(dev);
871 if (regs.len > reglen)
872 regs.len = reglen;
873
874 regbuf = vzalloc(reglen);
875 if (reglen && !regbuf)
876 return -ENOMEM;
877
878 ops->get_regs(dev, &regs, regbuf);
879
880 ret = -EFAULT;
881 if (copy_to_user(useraddr, &regs, sizeof(regs)))
882 goto out;
883 useraddr += offsetof(struct ethtool_regs, data);
884 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
885 goto out;
886 ret = 0;
887
888 out:
889 vfree(regbuf);
890 return ret;
891 }
892
893 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
894 {
895 struct ethtool_value reset;
896 int ret;
897
898 if (!dev->ethtool_ops->reset)
899 return -EOPNOTSUPP;
900
901 if (copy_from_user(&reset, useraddr, sizeof(reset)))
902 return -EFAULT;
903
904 ret = dev->ethtool_ops->reset(dev, &reset.data);
905 if (ret)
906 return ret;
907
908 if (copy_to_user(useraddr, &reset, sizeof(reset)))
909 return -EFAULT;
910 return 0;
911 }
912
913 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
914 {
915 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
916
917 if (!dev->ethtool_ops->get_wol)
918 return -EOPNOTSUPP;
919
920 dev->ethtool_ops->get_wol(dev, &wol);
921
922 if (copy_to_user(useraddr, &wol, sizeof(wol)))
923 return -EFAULT;
924 return 0;
925 }
926
927 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
928 {
929 struct ethtool_wolinfo wol;
930
931 if (!dev->ethtool_ops->set_wol)
932 return -EOPNOTSUPP;
933
934 if (copy_from_user(&wol, useraddr, sizeof(wol)))
935 return -EFAULT;
936
937 return dev->ethtool_ops->set_wol(dev, &wol);
938 }
939
940 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
941 {
942 struct ethtool_eee edata;
943 int rc;
944
945 if (!dev->ethtool_ops->get_eee)
946 return -EOPNOTSUPP;
947
948 memset(&edata, 0, sizeof(struct ethtool_eee));
949 edata.cmd = ETHTOOL_GEEE;
950 rc = dev->ethtool_ops->get_eee(dev, &edata);
951
952 if (rc)
953 return rc;
954
955 if (copy_to_user(useraddr, &edata, sizeof(edata)))
956 return -EFAULT;
957
958 return 0;
959 }
960
961 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
962 {
963 struct ethtool_eee edata;
964
965 if (!dev->ethtool_ops->set_eee)
966 return -EOPNOTSUPP;
967
968 if (copy_from_user(&edata, useraddr, sizeof(edata)))
969 return -EFAULT;
970
971 return dev->ethtool_ops->set_eee(dev, &edata);
972 }
973
974 static int ethtool_nway_reset(struct net_device *dev)
975 {
976 if (!dev->ethtool_ops->nway_reset)
977 return -EOPNOTSUPP;
978
979 return dev->ethtool_ops->nway_reset(dev);
980 }
981
982 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
983 {
984 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
985
986 if (!dev->ethtool_ops->get_link)
987 return -EOPNOTSUPP;
988
989 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
990
991 if (copy_to_user(useraddr, &edata, sizeof(edata)))
992 return -EFAULT;
993 return 0;
994 }
995
996 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
997 int (*getter)(struct net_device *,
998 struct ethtool_eeprom *, u8 *),
999 u32 total_len)
1000 {
1001 struct ethtool_eeprom eeprom;
1002 void __user *userbuf = useraddr + sizeof(eeprom);
1003 u32 bytes_remaining;
1004 u8 *data;
1005 int ret = 0;
1006
1007 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1008 return -EFAULT;
1009
1010 /* Check for wrap and zero */
1011 if (eeprom.offset + eeprom.len <= eeprom.offset)
1012 return -EINVAL;
1013
1014 /* Check for exceeding total eeprom len */
1015 if (eeprom.offset + eeprom.len > total_len)
1016 return -EINVAL;
1017
1018 data = kmalloc(PAGE_SIZE, GFP_USER);
1019 if (!data)
1020 return -ENOMEM;
1021
1022 bytes_remaining = eeprom.len;
1023 while (bytes_remaining > 0) {
1024 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1025
1026 ret = getter(dev, &eeprom, data);
1027 if (ret)
1028 break;
1029 if (copy_to_user(userbuf, data, eeprom.len)) {
1030 ret = -EFAULT;
1031 break;
1032 }
1033 userbuf += eeprom.len;
1034 eeprom.offset += eeprom.len;
1035 bytes_remaining -= eeprom.len;
1036 }
1037
1038 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1039 eeprom.offset -= eeprom.len;
1040 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1041 ret = -EFAULT;
1042
1043 kfree(data);
1044 return ret;
1045 }
1046
1047 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1048 {
1049 const struct ethtool_ops *ops = dev->ethtool_ops;
1050
1051 if (!ops->get_eeprom || !ops->get_eeprom_len)
1052 return -EOPNOTSUPP;
1053
1054 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1055 ops->get_eeprom_len(dev));
1056 }
1057
1058 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1059 {
1060 struct ethtool_eeprom eeprom;
1061 const struct ethtool_ops *ops = dev->ethtool_ops;
1062 void __user *userbuf = useraddr + sizeof(eeprom);
1063 u32 bytes_remaining;
1064 u8 *data;
1065 int ret = 0;
1066
1067 if (!ops->set_eeprom || !ops->get_eeprom_len)
1068 return -EOPNOTSUPP;
1069
1070 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1071 return -EFAULT;
1072
1073 /* Check for wrap and zero */
1074 if (eeprom.offset + eeprom.len <= eeprom.offset)
1075 return -EINVAL;
1076
1077 /* Check for exceeding total eeprom len */
1078 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1079 return -EINVAL;
1080
1081 data = kmalloc(PAGE_SIZE, GFP_USER);
1082 if (!data)
1083 return -ENOMEM;
1084
1085 bytes_remaining = eeprom.len;
1086 while (bytes_remaining > 0) {
1087 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1088
1089 if (copy_from_user(data, userbuf, eeprom.len)) {
1090 ret = -EFAULT;
1091 break;
1092 }
1093 ret = ops->set_eeprom(dev, &eeprom, data);
1094 if (ret)
1095 break;
1096 userbuf += eeprom.len;
1097 eeprom.offset += eeprom.len;
1098 bytes_remaining -= eeprom.len;
1099 }
1100
1101 kfree(data);
1102 return ret;
1103 }
1104
1105 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1106 void __user *useraddr)
1107 {
1108 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1109
1110 if (!dev->ethtool_ops->get_coalesce)
1111 return -EOPNOTSUPP;
1112
1113 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1114
1115 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1116 return -EFAULT;
1117 return 0;
1118 }
1119
1120 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1121 void __user *useraddr)
1122 {
1123 struct ethtool_coalesce coalesce;
1124
1125 if (!dev->ethtool_ops->set_coalesce)
1126 return -EOPNOTSUPP;
1127
1128 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1129 return -EFAULT;
1130
1131 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1132 }
1133
1134 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1135 {
1136 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1137
1138 if (!dev->ethtool_ops->get_ringparam)
1139 return -EOPNOTSUPP;
1140
1141 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1142
1143 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1144 return -EFAULT;
1145 return 0;
1146 }
1147
1148 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1149 {
1150 struct ethtool_ringparam ringparam;
1151
1152 if (!dev->ethtool_ops->set_ringparam)
1153 return -EOPNOTSUPP;
1154
1155 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1156 return -EFAULT;
1157
1158 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1159 }
1160
1161 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1162 void __user *useraddr)
1163 {
1164 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1165
1166 if (!dev->ethtool_ops->get_channels)
1167 return -EOPNOTSUPP;
1168
1169 dev->ethtool_ops->get_channels(dev, &channels);
1170
1171 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1172 return -EFAULT;
1173 return 0;
1174 }
1175
1176 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1177 void __user *useraddr)
1178 {
1179 struct ethtool_channels channels;
1180
1181 if (!dev->ethtool_ops->set_channels)
1182 return -EOPNOTSUPP;
1183
1184 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1185 return -EFAULT;
1186
1187 return dev->ethtool_ops->set_channels(dev, &channels);
1188 }
1189
1190 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1191 {
1192 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1193
1194 if (!dev->ethtool_ops->get_pauseparam)
1195 return -EOPNOTSUPP;
1196
1197 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1198
1199 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1200 return -EFAULT;
1201 return 0;
1202 }
1203
1204 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1205 {
1206 struct ethtool_pauseparam pauseparam;
1207
1208 if (!dev->ethtool_ops->set_pauseparam)
1209 return -EOPNOTSUPP;
1210
1211 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1212 return -EFAULT;
1213
1214 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1215 }
1216
1217 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1218 {
1219 struct ethtool_test test;
1220 const struct ethtool_ops *ops = dev->ethtool_ops;
1221 u64 *data;
1222 int ret, test_len;
1223
1224 if (!ops->self_test || !ops->get_sset_count)
1225 return -EOPNOTSUPP;
1226
1227 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1228 if (test_len < 0)
1229 return test_len;
1230 WARN_ON(test_len == 0);
1231
1232 if (copy_from_user(&test, useraddr, sizeof(test)))
1233 return -EFAULT;
1234
1235 test.len = test_len;
1236 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1237 if (!data)
1238 return -ENOMEM;
1239
1240 ops->self_test(dev, &test, data);
1241
1242 ret = -EFAULT;
1243 if (copy_to_user(useraddr, &test, sizeof(test)))
1244 goto out;
1245 useraddr += sizeof(test);
1246 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1247 goto out;
1248 ret = 0;
1249
1250 out:
1251 kfree(data);
1252 return ret;
1253 }
1254
1255 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1256 {
1257 struct ethtool_gstrings gstrings;
1258 u8 *data;
1259 int ret;
1260
1261 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1262 return -EFAULT;
1263
1264 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1265 if (ret < 0)
1266 return ret;
1267
1268 gstrings.len = ret;
1269
1270 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1271 if (!data)
1272 return -ENOMEM;
1273
1274 __ethtool_get_strings(dev, gstrings.string_set, data);
1275
1276 ret = -EFAULT;
1277 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1278 goto out;
1279 useraddr += sizeof(gstrings);
1280 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1281 goto out;
1282 ret = 0;
1283
1284 out:
1285 kfree(data);
1286 return ret;
1287 }
1288
1289 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1290 {
1291 struct ethtool_value id;
1292 static bool busy;
1293 const struct ethtool_ops *ops = dev->ethtool_ops;
1294 int rc;
1295
1296 if (!ops->set_phys_id)
1297 return -EOPNOTSUPP;
1298
1299 if (busy)
1300 return -EBUSY;
1301
1302 if (copy_from_user(&id, useraddr, sizeof(id)))
1303 return -EFAULT;
1304
1305 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1306 if (rc < 0)
1307 return rc;
1308
1309 /* Drop the RTNL lock while waiting, but prevent reentry or
1310 * removal of the device.
1311 */
1312 busy = true;
1313 dev_hold(dev);
1314 rtnl_unlock();
1315
1316 if (rc == 0) {
1317 /* Driver will handle this itself */
1318 schedule_timeout_interruptible(
1319 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1320 } else {
1321 /* Driver expects to be called at twice the frequency in rc */
1322 int n = rc * 2, i, interval = HZ / n;
1323
1324 /* Count down seconds */
1325 do {
1326 /* Count down iterations per second */
1327 i = n;
1328 do {
1329 rtnl_lock();
1330 rc = ops->set_phys_id(dev,
1331 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1332 rtnl_unlock();
1333 if (rc)
1334 break;
1335 schedule_timeout_interruptible(interval);
1336 } while (!signal_pending(current) && --i != 0);
1337 } while (!signal_pending(current) &&
1338 (id.data == 0 || --id.data != 0));
1339 }
1340
1341 rtnl_lock();
1342 dev_put(dev);
1343 busy = false;
1344
1345 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1346 return rc;
1347 }
1348
1349 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1350 {
1351 struct ethtool_stats stats;
1352 const struct ethtool_ops *ops = dev->ethtool_ops;
1353 u64 *data;
1354 int ret, n_stats;
1355
1356 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1357 return -EOPNOTSUPP;
1358
1359 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1360 if (n_stats < 0)
1361 return n_stats;
1362 WARN_ON(n_stats == 0);
1363
1364 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1365 return -EFAULT;
1366
1367 stats.n_stats = n_stats;
1368 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1369 if (!data)
1370 return -ENOMEM;
1371
1372 ops->get_ethtool_stats(dev, &stats, data);
1373
1374 ret = -EFAULT;
1375 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1376 goto out;
1377 useraddr += sizeof(stats);
1378 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1379 goto out;
1380 ret = 0;
1381
1382 out:
1383 kfree(data);
1384 return ret;
1385 }
1386
1387 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1388 {
1389 struct ethtool_perm_addr epaddr;
1390
1391 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1392 return -EFAULT;
1393
1394 if (epaddr.size < dev->addr_len)
1395 return -ETOOSMALL;
1396 epaddr.size = dev->addr_len;
1397
1398 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1399 return -EFAULT;
1400 useraddr += sizeof(epaddr);
1401 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1402 return -EFAULT;
1403 return 0;
1404 }
1405
1406 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1407 u32 cmd, u32 (*actor)(struct net_device *))
1408 {
1409 struct ethtool_value edata = { .cmd = cmd };
1410
1411 if (!actor)
1412 return -EOPNOTSUPP;
1413
1414 edata.data = actor(dev);
1415
1416 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1417 return -EFAULT;
1418 return 0;
1419 }
1420
1421 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1422 void (*actor)(struct net_device *, u32))
1423 {
1424 struct ethtool_value edata;
1425
1426 if (!actor)
1427 return -EOPNOTSUPP;
1428
1429 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1430 return -EFAULT;
1431
1432 actor(dev, edata.data);
1433 return 0;
1434 }
1435
1436 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1437 int (*actor)(struct net_device *, u32))
1438 {
1439 struct ethtool_value edata;
1440
1441 if (!actor)
1442 return -EOPNOTSUPP;
1443
1444 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1445 return -EFAULT;
1446
1447 return actor(dev, edata.data);
1448 }
1449
1450 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1451 char __user *useraddr)
1452 {
1453 struct ethtool_flash efl;
1454
1455 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1456 return -EFAULT;
1457
1458 if (!dev->ethtool_ops->flash_device)
1459 return -EOPNOTSUPP;
1460
1461 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
1462
1463 return dev->ethtool_ops->flash_device(dev, &efl);
1464 }
1465
1466 static int ethtool_set_dump(struct net_device *dev,
1467 void __user *useraddr)
1468 {
1469 struct ethtool_dump dump;
1470
1471 if (!dev->ethtool_ops->set_dump)
1472 return -EOPNOTSUPP;
1473
1474 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1475 return -EFAULT;
1476
1477 return dev->ethtool_ops->set_dump(dev, &dump);
1478 }
1479
1480 static int ethtool_get_dump_flag(struct net_device *dev,
1481 void __user *useraddr)
1482 {
1483 int ret;
1484 struct ethtool_dump dump;
1485 const struct ethtool_ops *ops = dev->ethtool_ops;
1486
1487 if (!ops->get_dump_flag)
1488 return -EOPNOTSUPP;
1489
1490 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1491 return -EFAULT;
1492
1493 ret = ops->get_dump_flag(dev, &dump);
1494 if (ret)
1495 return ret;
1496
1497 if (copy_to_user(useraddr, &dump, sizeof(dump)))
1498 return -EFAULT;
1499 return 0;
1500 }
1501
1502 static int ethtool_get_dump_data(struct net_device *dev,
1503 void __user *useraddr)
1504 {
1505 int ret;
1506 __u32 len;
1507 struct ethtool_dump dump, tmp;
1508 const struct ethtool_ops *ops = dev->ethtool_ops;
1509 void *data = NULL;
1510
1511 if (!ops->get_dump_data || !ops->get_dump_flag)
1512 return -EOPNOTSUPP;
1513
1514 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1515 return -EFAULT;
1516
1517 memset(&tmp, 0, sizeof(tmp));
1518 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
1519 ret = ops->get_dump_flag(dev, &tmp);
1520 if (ret)
1521 return ret;
1522
1523 len = min(tmp.len, dump.len);
1524 if (!len)
1525 return -EFAULT;
1526
1527 /* Don't ever let the driver think there's more space available
1528 * than it requested with .get_dump_flag().
1529 */
1530 dump.len = len;
1531
1532 /* Always allocate enough space to hold the whole thing so that the
1533 * driver does not need to check the length and bother with partial
1534 * dumping.
1535 */
1536 data = vzalloc(tmp.len);
1537 if (!data)
1538 return -ENOMEM;
1539 ret = ops->get_dump_data(dev, &dump, data);
1540 if (ret)
1541 goto out;
1542
1543 /* There are two sane possibilities:
1544 * 1. The driver's .get_dump_data() does not touch dump.len.
1545 * 2. Or it may set dump.len to how much it really writes, which
1546 * should be tmp.len (or len if it can do a partial dump).
1547 * In any case respond to userspace with the actual length of data
1548 * it's receiving.
1549 */
1550 WARN_ON(dump.len != len && dump.len != tmp.len);
1551 dump.len = len;
1552
1553 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
1554 ret = -EFAULT;
1555 goto out;
1556 }
1557 useraddr += offsetof(struct ethtool_dump, data);
1558 if (copy_to_user(useraddr, data, len))
1559 ret = -EFAULT;
1560 out:
1561 vfree(data);
1562 return ret;
1563 }
1564
1565 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
1566 {
1567 int err = 0;
1568 struct ethtool_ts_info info;
1569 const struct ethtool_ops *ops = dev->ethtool_ops;
1570 struct phy_device *phydev = dev->phydev;
1571
1572 memset(&info, 0, sizeof(info));
1573 info.cmd = ETHTOOL_GET_TS_INFO;
1574
1575 if (phydev && phydev->drv && phydev->drv->ts_info) {
1576 err = phydev->drv->ts_info(phydev, &info);
1577 } else if (ops->get_ts_info) {
1578 err = ops->get_ts_info(dev, &info);
1579 } else {
1580 info.so_timestamping =
1581 SOF_TIMESTAMPING_RX_SOFTWARE |
1582 SOF_TIMESTAMPING_SOFTWARE;
1583 info.phc_index = -1;
1584 }
1585
1586 if (err)
1587 return err;
1588
1589 if (copy_to_user(useraddr, &info, sizeof(info)))
1590 err = -EFAULT;
1591
1592 return err;
1593 }
1594
1595 static int ethtool_get_module_info(struct net_device *dev,
1596 void __user *useraddr)
1597 {
1598 int ret;
1599 struct ethtool_modinfo modinfo;
1600 const struct ethtool_ops *ops = dev->ethtool_ops;
1601
1602 if (!ops->get_module_info)
1603 return -EOPNOTSUPP;
1604
1605 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
1606 return -EFAULT;
1607
1608 ret = ops->get_module_info(dev, &modinfo);
1609 if (ret)
1610 return ret;
1611
1612 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
1613 return -EFAULT;
1614
1615 return 0;
1616 }
1617
1618 static int ethtool_get_module_eeprom(struct net_device *dev,
1619 void __user *useraddr)
1620 {
1621 int ret;
1622 struct ethtool_modinfo modinfo;
1623 const struct ethtool_ops *ops = dev->ethtool_ops;
1624
1625 if (!ops->get_module_info || !ops->get_module_eeprom)
1626 return -EOPNOTSUPP;
1627
1628 ret = ops->get_module_info(dev, &modinfo);
1629 if (ret)
1630 return ret;
1631
1632 return ethtool_get_any_eeprom(dev, useraddr, ops->get_module_eeprom,
1633 modinfo.eeprom_len);
1634 }
1635
1636 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
1637
1638 int dev_ethtool(struct net *net, struct ifreq *ifr)
1639 {
1640 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1641 void __user *useraddr = ifr->ifr_data;
1642 u32 ethcmd;
1643 int rc;
1644 netdev_features_t old_features;
1645
1646 if (!dev || !netif_device_present(dev))
1647 return -ENODEV;
1648
1649 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1650 return -EFAULT;
1651
1652 /* Allow some commands to be done by anyone */
1653 switch (ethcmd) {
1654 case ETHTOOL_GSET:
1655 case ETHTOOL_GDRVINFO:
1656 case ETHTOOL_GMSGLVL:
1657 case ETHTOOL_GLINK:
1658 case ETHTOOL_GCOALESCE:
1659 case ETHTOOL_GRINGPARAM:
1660 case ETHTOOL_GPAUSEPARAM:
1661 case ETHTOOL_GRXCSUM:
1662 case ETHTOOL_GTXCSUM:
1663 case ETHTOOL_GSG:
1664 case ETHTOOL_GSSET_INFO:
1665 case ETHTOOL_GSTRINGS:
1666 case ETHTOOL_GSTATS:
1667 case ETHTOOL_GTSO:
1668 case ETHTOOL_GPERMADDR:
1669 case ETHTOOL_GUFO:
1670 case ETHTOOL_GGSO:
1671 case ETHTOOL_GGRO:
1672 case ETHTOOL_GFLAGS:
1673 case ETHTOOL_GPFLAGS:
1674 case ETHTOOL_GRXFH:
1675 case ETHTOOL_GRXRINGS:
1676 case ETHTOOL_GRXCLSRLCNT:
1677 case ETHTOOL_GRXCLSRULE:
1678 case ETHTOOL_GRXCLSRLALL:
1679 case ETHTOOL_GRXFHINDIR:
1680 case ETHTOOL_GRSSH:
1681 case ETHTOOL_GFEATURES:
1682 case ETHTOOL_GCHANNELS:
1683 case ETHTOOL_GET_TS_INFO:
1684 case ETHTOOL_GEEE:
1685 break;
1686 default:
1687 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1688 return -EPERM;
1689 }
1690
1691 if (dev->ethtool_ops->begin) {
1692 rc = dev->ethtool_ops->begin(dev);
1693 if (rc < 0)
1694 return rc;
1695 }
1696 old_features = dev->features;
1697
1698 switch (ethcmd) {
1699 case ETHTOOL_GSET:
1700 rc = ethtool_get_settings(dev, useraddr);
1701 break;
1702 case ETHTOOL_SSET:
1703 rc = ethtool_set_settings(dev, useraddr);
1704 break;
1705 case ETHTOOL_GDRVINFO:
1706 rc = ethtool_get_drvinfo(dev, useraddr);
1707 break;
1708 case ETHTOOL_GREGS:
1709 rc = ethtool_get_regs(dev, useraddr);
1710 break;
1711 case ETHTOOL_GWOL:
1712 rc = ethtool_get_wol(dev, useraddr);
1713 break;
1714 case ETHTOOL_SWOL:
1715 rc = ethtool_set_wol(dev, useraddr);
1716 break;
1717 case ETHTOOL_GMSGLVL:
1718 rc = ethtool_get_value(dev, useraddr, ethcmd,
1719 dev->ethtool_ops->get_msglevel);
1720 break;
1721 case ETHTOOL_SMSGLVL:
1722 rc = ethtool_set_value_void(dev, useraddr,
1723 dev->ethtool_ops->set_msglevel);
1724 break;
1725 case ETHTOOL_GEEE:
1726 rc = ethtool_get_eee(dev, useraddr);
1727 break;
1728 case ETHTOOL_SEEE:
1729 rc = ethtool_set_eee(dev, useraddr);
1730 break;
1731 case ETHTOOL_NWAY_RST:
1732 rc = ethtool_nway_reset(dev);
1733 break;
1734 case ETHTOOL_GLINK:
1735 rc = ethtool_get_link(dev, useraddr);
1736 break;
1737 case ETHTOOL_GEEPROM:
1738 rc = ethtool_get_eeprom(dev, useraddr);
1739 break;
1740 case ETHTOOL_SEEPROM:
1741 rc = ethtool_set_eeprom(dev, useraddr);
1742 break;
1743 case ETHTOOL_GCOALESCE:
1744 rc = ethtool_get_coalesce(dev, useraddr);
1745 break;
1746 case ETHTOOL_SCOALESCE:
1747 rc = ethtool_set_coalesce(dev, useraddr);
1748 break;
1749 case ETHTOOL_GRINGPARAM:
1750 rc = ethtool_get_ringparam(dev, useraddr);
1751 break;
1752 case ETHTOOL_SRINGPARAM:
1753 rc = ethtool_set_ringparam(dev, useraddr);
1754 break;
1755 case ETHTOOL_GPAUSEPARAM:
1756 rc = ethtool_get_pauseparam(dev, useraddr);
1757 break;
1758 case ETHTOOL_SPAUSEPARAM:
1759 rc = ethtool_set_pauseparam(dev, useraddr);
1760 break;
1761 case ETHTOOL_TEST:
1762 rc = ethtool_self_test(dev, useraddr);
1763 break;
1764 case ETHTOOL_GSTRINGS:
1765 rc = ethtool_get_strings(dev, useraddr);
1766 break;
1767 case ETHTOOL_PHYS_ID:
1768 rc = ethtool_phys_id(dev, useraddr);
1769 break;
1770 case ETHTOOL_GSTATS:
1771 rc = ethtool_get_stats(dev, useraddr);
1772 break;
1773 case ETHTOOL_GPERMADDR:
1774 rc = ethtool_get_perm_addr(dev, useraddr);
1775 break;
1776 case ETHTOOL_GFLAGS:
1777 rc = ethtool_get_value(dev, useraddr, ethcmd,
1778 __ethtool_get_flags);
1779 break;
1780 case ETHTOOL_SFLAGS:
1781 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
1782 break;
1783 case ETHTOOL_GPFLAGS:
1784 rc = ethtool_get_value(dev, useraddr, ethcmd,
1785 dev->ethtool_ops->get_priv_flags);
1786 break;
1787 case ETHTOOL_SPFLAGS:
1788 rc = ethtool_set_value(dev, useraddr,
1789 dev->ethtool_ops->set_priv_flags);
1790 break;
1791 case ETHTOOL_GRXFH:
1792 case ETHTOOL_GRXRINGS:
1793 case ETHTOOL_GRXCLSRLCNT:
1794 case ETHTOOL_GRXCLSRULE:
1795 case ETHTOOL_GRXCLSRLALL:
1796 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1797 break;
1798 case ETHTOOL_SRXFH:
1799 case ETHTOOL_SRXCLSRLDEL:
1800 case ETHTOOL_SRXCLSRLINS:
1801 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1802 break;
1803 case ETHTOOL_FLASHDEV:
1804 rc = ethtool_flash_device(dev, useraddr);
1805 break;
1806 case ETHTOOL_RESET:
1807 rc = ethtool_reset(dev, useraddr);
1808 break;
1809 case ETHTOOL_GSSET_INFO:
1810 rc = ethtool_get_sset_info(dev, useraddr);
1811 break;
1812 case ETHTOOL_GRXFHINDIR:
1813 rc = ethtool_get_rxfh_indir(dev, useraddr);
1814 break;
1815 case ETHTOOL_SRXFHINDIR:
1816 rc = ethtool_set_rxfh_indir(dev, useraddr);
1817 break;
1818 case ETHTOOL_GRSSH:
1819 rc = ethtool_get_rxfh(dev, useraddr);
1820 break;
1821 case ETHTOOL_SRSSH:
1822 rc = ethtool_set_rxfh(dev, useraddr);
1823 break;
1824 case ETHTOOL_GFEATURES:
1825 rc = ethtool_get_features(dev, useraddr);
1826 break;
1827 case ETHTOOL_SFEATURES:
1828 rc = ethtool_set_features(dev, useraddr);
1829 break;
1830 case ETHTOOL_GTXCSUM:
1831 case ETHTOOL_GRXCSUM:
1832 case ETHTOOL_GSG:
1833 case ETHTOOL_GTSO:
1834 case ETHTOOL_GUFO:
1835 case ETHTOOL_GGSO:
1836 case ETHTOOL_GGRO:
1837 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
1838 break;
1839 case ETHTOOL_STXCSUM:
1840 case ETHTOOL_SRXCSUM:
1841 case ETHTOOL_SSG:
1842 case ETHTOOL_STSO:
1843 case ETHTOOL_SUFO:
1844 case ETHTOOL_SGSO:
1845 case ETHTOOL_SGRO:
1846 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
1847 break;
1848 case ETHTOOL_GCHANNELS:
1849 rc = ethtool_get_channels(dev, useraddr);
1850 break;
1851 case ETHTOOL_SCHANNELS:
1852 rc = ethtool_set_channels(dev, useraddr);
1853 break;
1854 case ETHTOOL_SET_DUMP:
1855 rc = ethtool_set_dump(dev, useraddr);
1856 break;
1857 case ETHTOOL_GET_DUMP_FLAG:
1858 rc = ethtool_get_dump_flag(dev, useraddr);
1859 break;
1860 case ETHTOOL_GET_DUMP_DATA:
1861 rc = ethtool_get_dump_data(dev, useraddr);
1862 break;
1863 case ETHTOOL_GET_TS_INFO:
1864 rc = ethtool_get_ts_info(dev, useraddr);
1865 break;
1866 case ETHTOOL_GMODULEINFO:
1867 rc = ethtool_get_module_info(dev, useraddr);
1868 break;
1869 case ETHTOOL_GMODULEEEPROM:
1870 rc = ethtool_get_module_eeprom(dev, useraddr);
1871 break;
1872 default:
1873 rc = -EOPNOTSUPP;
1874 }
1875
1876 if (dev->ethtool_ops->complete)
1877 dev->ethtool_ops->complete(dev);
1878
1879 if (old_features != dev->features)
1880 netdev_features_change(dev);
1881
1882 return rc;
1883 }
Linux kernel - Deliverables
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