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Merge branch 'master' into for-3.12/upstream
[deliverable/linux.git] / net / core / ethtool.c
CommitLineData
1da177e4
LT		 1/*
2 * net/core/ethtool.c - Ethtool ioctl handler
3 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
4 *
5 * This file is where we call all the ethtool_ops commands to get
61a44b9c 6 * the information ethtool needs.
1da177e4 7 *
61a44b9c
MW		 8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
1da177e4
LT		 12 */
13
14#include <linux/module.h>
15#include <linux/types.h>
4fc268d2 16#include <linux/capability.h>
1da177e4
LT		 17#include <linux/errno.h>
18#include <linux/ethtool.h>
19#include <linux/netdevice.h>
c8f3a8c3
RC		 20#include <linux/net_tstamp.h>
21#include <linux/phy.h>
d17792eb 22#include <linux/bitops.h>
97f8aefb 23#include <linux/uaccess.h>
73da16c2 24#include <linux/vmalloc.h>
5a0e3ad6 25#include <linux/slab.h>
68f512f2
BH		 26#include <linux/rtnetlink.h>
27#include <linux/sched.h>
1da177e4 28
4ec93edb 29/*
1da177e4
LT		 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
35u32 ethtool_op_get_link(struct net_device *dev)
36{
37 return netif_carrier_ok(dev) ? 1 : 0;
38}
97f8aefb 39EXPORT_SYMBOL(ethtool_op_get_link);
1da177e4 40
02eacbd0
RC		 41int 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}
50EXPORT_SYMBOL(ethtool_op_get_ts_info);
51
1da177e4
LT		 52/* Handlers for each ethtool command */
53
475414f6 54#define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
5455c699 55
9d921549
MM		 56static 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",
9d921549
MM		 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",
788dfcac 63 [NETIF_F_HW_VLAN_CTAG_TX_BIT] = "tx-vlan-hw-insert",
9d921549 64
788dfcac
FLVC		 65 [NETIF_F_HW_VLAN_CTAG_RX_BIT] = "rx-vlan-hw-parse",
66 [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
2d6577f1
DM		 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",
9d921549
MM		 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",
68c33163 83 [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
73136267 84 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
0d89d203 85 [NETIF_F_GSO_MPLS_BIT] = "tx-mpls-segmentation",
9d921549
MM		 86
87 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
88 [NETIF_F_SCTP_CSUM_BIT] = "tx-checksum-sctp",
89 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
90 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
91 [NETIF_F_RXHASH_BIT] = "rx-hashing",
92 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
93 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
94 [NETIF_F_LOOPBACK_BIT] = "loopback",
36eabda3 95 [NETIF_F_RXFCS_BIT] = "rx-fcs",
5e0c03c8 96 [NETIF_F_RXALL_BIT] = "rx-all",
9d921549
MM		 97};
98
5455c699
MM		 99static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
100{
101 struct ethtool_gfeatures cmd = {
102 .cmd = ETHTOOL_GFEATURES,
103 .size = ETHTOOL_DEV_FEATURE_WORDS,
104 };
475414f6 105 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
5455c699
MM		 106 u32 __user *sizeaddr;
107 u32 copy_size;
475414f6
MM		 108 int i;
109
110 /* in case feature bits run out again */
09da71b1 111 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
475414f6
MM		 112
113 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 114 features[i].available = (u32)(dev->hw_features >> (32 * i));
115 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
116 features[i].active = (u32)(dev->features >> (32 * i));
117 features[i].never_changed =
118 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
475414f6 119 }
5455c699
MM		 120
121 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
122 if (get_user(copy_size, sizeaddr))
123 return -EFAULT;
124
125 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
126 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
127
128 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
129 return -EFAULT;
130 useraddr += sizeof(cmd);
131 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
132 return -EFAULT;
133
134 return 0;
135}
136
137static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
138{
139 struct ethtool_sfeatures cmd;
140 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
475414f6
MM		 141 netdev_features_t wanted = 0, valid = 0;
142 int i, ret = 0;
5455c699
MM		 143
144 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
145 return -EFAULT;
146 useraddr += sizeof(cmd);
147
148 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
149 return -EINVAL;
150
151 if (copy_from_user(features, useraddr, sizeof(features)))
152 return -EFAULT;
153
475414f6 154 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 155 valid |= (netdev_features_t)features[i].valid << (32 * i);
156 wanted |= (netdev_features_t)features[i].requested << (32 * i);
475414f6
MM		 157 }
158
159 if (valid & ~NETIF_F_ETHTOOL_BITS)
5455c699
MM		 160 return -EINVAL;
161
475414f6
MM		 162 if (valid & ~dev->hw_features) {
163 valid &= dev->hw_features;
5455c699
MM		 164 ret |= ETHTOOL_F_UNSUPPORTED;
165 }
166
475414f6
MM		 167 dev->wanted_features &= ~valid;
168 dev->wanted_features |= wanted & valid;
6cb6a27c 169 __netdev_update_features(dev);
5455c699 170
475414f6 171 if ((dev->wanted_features ^ dev->features) & valid)
5455c699
MM		 172 ret |= ETHTOOL_F_WISH;
173
174 return ret;
175}
176
340ae165
MM		 177static int __ethtool_get_sset_count(struct net_device *dev, int sset)
178{
179 const struct ethtool_ops *ops = dev->ethtool_ops;
180
5455c699
MM		 181 if (sset == ETH_SS_FEATURES)
182 return ARRAY_SIZE(netdev_features_strings);
183
c03a14e8 184 if (ops->get_sset_count && ops->get_strings)
340ae165
MM		 185 return ops->get_sset_count(dev, sset);
186 else
187 return -EOPNOTSUPP;
188}
189
190static void __ethtool_get_strings(struct net_device *dev,
191 u32 stringset, u8 *data)
192{
193 const struct ethtool_ops *ops = dev->ethtool_ops;
194
5455c699
MM		 195 if (stringset == ETH_SS_FEATURES)
196 memcpy(data, netdev_features_strings,
197 sizeof(netdev_features_strings));
198 else
199 /* ops->get_strings is valid because checked earlier */
200 ops->get_strings(dev, stringset, data);
340ae165
MM		 201}
202
c8f44aff 203static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
0a417704
MM		 204{
205 /* feature masks of legacy discrete ethtool ops */
206
207 switch (eth_cmd) {
208 case ETHTOOL_GTXCSUM:
209 case ETHTOOL_STXCSUM:
210 return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM;
e83d360d
MM		 211 case ETHTOOL_GRXCSUM:
212 case ETHTOOL_SRXCSUM:
213 return NETIF_F_RXCSUM;
0a417704
MM		 214 case ETHTOOL_GSG:
215 case ETHTOOL_SSG:
216 return NETIF_F_SG;
217 case ETHTOOL_GTSO:
218 case ETHTOOL_STSO:
219 return NETIF_F_ALL_TSO;
220 case ETHTOOL_GUFO:
221 case ETHTOOL_SUFO:
222 return NETIF_F_UFO;
223 case ETHTOOL_GGSO:
224 case ETHTOOL_SGSO:
225 return NETIF_F_GSO;
226 case ETHTOOL_GGRO:
227 case ETHTOOL_SGRO:
228 return NETIF_F_GRO;
229 default:
230 BUG();
231 }
232}
233
0a417704
MM		 234static int ethtool_get_one_feature(struct net_device *dev,
235 char __user *useraddr, u32 ethcmd)
236{
c8f44aff 237 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
0a417704
MM		 238 struct ethtool_value edata = {
239 .cmd = ethcmd,
86794881 240 .data = !!(dev->features & mask),
0a417704 241 };
0a417704 242
0a417704
MM		 243 if (copy_to_user(useraddr, &edata, sizeof(edata)))
244 return -EFAULT;
245 return 0;
246}
247
0a417704
MM		 248static int ethtool_set_one_feature(struct net_device *dev,
249 void __user *useraddr, u32 ethcmd)
250{
251 struct ethtool_value edata;
c8f44aff 252 netdev_features_t mask;
0a417704
MM		 253
254 if (copy_from_user(&edata, useraddr, sizeof(edata)))
255 return -EFAULT;
256
86794881
MM		 257 mask = ethtool_get_feature_mask(ethcmd);
258 mask &= dev->hw_features;
bc5787c6
MM		 259 if (!mask)
260 return -EOPNOTSUPP;
86794881 261
bc5787c6
MM		 262 if (edata.data)
263 dev->wanted_features |= mask;
264 else
265 dev->wanted_features &= ~mask;
86794881 266
bc5787c6 267 __netdev_update_features(dev);
86794881 268
bc5787c6
MM		 269 return 0;
270}
271
02b3a552
MM		 272#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
273 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
f646968f
PM		 274#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
275 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
276 NETIF_F_RXHASH)
bc5787c6
MM		 277
278static u32 __ethtool_get_flags(struct net_device *dev)
279{
02b3a552
MM		 280 u32 flags = 0;
281
8a73125c
DF		 282 if (dev->features & NETIF_F_LRO)
283 flags |= ETH_FLAG_LRO;
284 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
285 flags |= ETH_FLAG_RXVLAN;
286 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
287 flags |= ETH_FLAG_TXVLAN;
288 if (dev->features & NETIF_F_NTUPLE)
289 flags |= ETH_FLAG_NTUPLE;
290 if (dev->features & NETIF_F_RXHASH)
291 flags |= ETH_FLAG_RXHASH;
02b3a552
MM		 292
293 return flags;
0a417704
MM		 294}
295
bc5787c6 296static int __ethtool_set_flags(struct net_device *dev, u32 data)
da8ac86c 297{
c8f44aff 298 netdev_features_t features = 0, changed;
da8ac86c 299
02b3a552 300 if (data & ~ETH_ALL_FLAGS)
da8ac86c
MM		 301 return -EINVAL;
302
8a73125c
DF		 303 if (data & ETH_FLAG_LRO)
304 features |= NETIF_F_LRO;
305 if (data & ETH_FLAG_RXVLAN)
306 features |= NETIF_F_HW_VLAN_CTAG_RX;
307 if (data & ETH_FLAG_TXVLAN)
308 features |= NETIF_F_HW_VLAN_CTAG_TX;
309 if (data & ETH_FLAG_NTUPLE)
310 features |= NETIF_F_NTUPLE;
311 if (data & ETH_FLAG_RXHASH)
312 features |= NETIF_F_RXHASH;
02b3a552 313
da8ac86c 314 /* allow changing only bits set in hw_features */
02b3a552 315 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
da8ac86c
MM		 316 if (changed & ~dev->hw_features)
317 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
318
319 dev->wanted_features =
02b3a552 320 (dev->wanted_features & ~changed) | (features & changed);
da8ac86c 321
6cb6a27c 322 __netdev_update_features(dev);
da8ac86c
MM		 323
324 return 0;
325}
326
4bc71cb9 327int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1da177e4 328{
4bc71cb9 329 ASSERT_RTNL();
1da177e4 330
c03a14e8 331 if (!dev->ethtool_ops->get_settings)
1da177e4
LT		 332 return -EOPNOTSUPP;
333
4bc71cb9
JP		 334 memset(cmd, 0, sizeof(struct ethtool_cmd));
335 cmd->cmd = ETHTOOL_GSET;
336 return dev->ethtool_ops->get_settings(dev, cmd);
337}
338EXPORT_SYMBOL(__ethtool_get_settings);
339
340static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
341{
342 int err;
343 struct ethtool_cmd cmd;
344
345 err = __ethtool_get_settings(dev, &cmd);
1da177e4
LT		 346 if (err < 0)
347 return err;
348
349 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
350 return -EFAULT;
351 return 0;
352}
353
354static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
355{
356 struct ethtool_cmd cmd;
357
358 if (!dev->ethtool_ops->set_settings)
359 return -EOPNOTSUPP;
360
361 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
362 return -EFAULT;
363
364 return dev->ethtool_ops->set_settings(dev, &cmd);
365}
366
97f8aefb 367static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
368 void __user *useraddr)
1da177e4
LT		 369{
370 struct ethtool_drvinfo info;
76fd8593 371 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 372
1da177e4
LT		 373 memset(&info, 0, sizeof(info));
374 info.cmd = ETHTOOL_GDRVINFO;
c03a14e8 375 if (ops->get_drvinfo) {
01414802
BH		 376 ops->get_drvinfo(dev, &info);
377 } else if (dev->dev.parent && dev->dev.parent->driver) {
378 strlcpy(info.bus_info, dev_name(dev->dev.parent),
379 sizeof(info.bus_info));
380 strlcpy(info.driver, dev->dev.parent->driver->name,
381 sizeof(info.driver));
382 } else {
383 return -EOPNOTSUPP;
384 }
1da177e4 385
723b2f57
JG		 386 /*
387 * this method of obtaining string set info is deprecated;
d17792eb 388 * Use ETHTOOL_GSSET_INFO instead.
723b2f57 389 */
c03a14e8 390 if (ops->get_sset_count) {
ff03d49f
JG		 391 int rc;
392
393 rc = ops->get_sset_count(dev, ETH_SS_TEST);
394 if (rc >= 0)
395 info.testinfo_len = rc;
396 rc = ops->get_sset_count(dev, ETH_SS_STATS);
397 if (rc >= 0)
398 info.n_stats = rc;
339bf024
JG		 399 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
400 if (rc >= 0)
401 info.n_priv_flags = rc;
ff03d49f 402 }
c03a14e8 403 if (ops->get_regs_len)
1da177e4 404 info.regdump_len = ops->get_regs_len(dev);
c03a14e8 405 if (ops->get_eeprom_len)
1da177e4
LT		 406 info.eedump_len = ops->get_eeprom_len(dev);
407
408 if (copy_to_user(useraddr, &info, sizeof(info)))
409 return -EFAULT;
410 return 0;
411}
412
f5c445ed 413static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
97f8aefb 414 void __user *useraddr)
723b2f57
JG		 415{
416 struct ethtool_sset_info info;
723b2f57
JG		 417 u64 sset_mask;
418 int i, idx = 0, n_bits = 0, ret, rc;
419 u32 *info_buf = NULL;
420
723b2f57
JG		 421 if (copy_from_user(&info, useraddr, sizeof(info)))
422 return -EFAULT;
423
424 /* store copy of mask, because we zero struct later on */
425 sset_mask = info.sset_mask;
426 if (!sset_mask)
427 return 0;
428
429 /* calculate size of return buffer */
d17792eb 430 n_bits = hweight64(sset_mask);
723b2f57
JG		 431
432 memset(&info, 0, sizeof(info));
433 info.cmd = ETHTOOL_GSSET_INFO;
434
435 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
436 if (!info_buf)
437 return -ENOMEM;
438
439 /*
440 * fill return buffer based on input bitmask and successful
441 * get_sset_count return
442 */
443 for (i = 0; i < 64; i++) {
444 if (!(sset_mask & (1ULL << i)))
445 continue;
446
340ae165 447 rc = __ethtool_get_sset_count(dev, i);
723b2f57
JG		 448 if (rc >= 0) {
449 info.sset_mask |= (1ULL << i);
450 info_buf[idx++] = rc;
451 }
452 }
453
454 ret = -EFAULT;
455 if (copy_to_user(useraddr, &info, sizeof(info)))
456 goto out;
457
458 useraddr += offsetof(struct ethtool_sset_info, data);
459 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
460 goto out;
461
462 ret = 0;
463
464out:
465 kfree(info_buf);
466 return ret;
467}
468
97f8aefb 469static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
bf988435 470 u32 cmd, void __user *useraddr)
0853ad66 471{
bf988435
BH		 472 struct ethtool_rxnfc info;
473 size_t info_size = sizeof(info);
55664f32 474 int rc;
0853ad66 475
59089d8d 476 if (!dev->ethtool_ops->set_rxnfc)
0853ad66
SB		 477 return -EOPNOTSUPP;
478
bf988435
BH		 479 /* struct ethtool_rxnfc was originally defined for
480 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
481 * members. User-space might still be using that
482 * definition. */
483 if (cmd == ETHTOOL_SRXFH)
484 info_size = (offsetof(struct ethtool_rxnfc, data) +
485 sizeof(info.data));
486
487 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 488 return -EFAULT;
489
55664f32
BH		 490 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
491 if (rc)
492 return rc;
493
494 if (cmd == ETHTOOL_SRXCLSRLINS &&
495 copy_to_user(useraddr, &info, info_size))
496 return -EFAULT;
497
498 return 0;
0853ad66
SB		 499}
500
97f8aefb 501static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
bf988435 502 u32 cmd, void __user *useraddr)
0853ad66
SB		 503{
504 struct ethtool_rxnfc info;
bf988435 505 size_t info_size = sizeof(info);
59089d8d
SB		 506 const struct ethtool_ops *ops = dev->ethtool_ops;
507 int ret;
508 void *rule_buf = NULL;
0853ad66 509
59089d8d 510 if (!ops->get_rxnfc)
0853ad66
SB		 511 return -EOPNOTSUPP;
512
bf988435
BH		 513 /* struct ethtool_rxnfc was originally defined for
514 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
515 * members. User-space might still be using that
516 * definition. */
517 if (cmd == ETHTOOL_GRXFH)
518 info_size = (offsetof(struct ethtool_rxnfc, data) +
519 sizeof(info.data));
520
521 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 522 return -EFAULT;
523
59089d8d
SB		 524 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
525 if (info.rule_cnt > 0) {
db048b69 526 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
ae6df5f9 527 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
db048b69 528 GFP_USER);
59089d8d
SB		 529 if (!rule_buf)
530 return -ENOMEM;
531 }
532 }
0853ad66 533
59089d8d
SB		 534 ret = ops->get_rxnfc(dev, &info, rule_buf);
535 if (ret < 0)
536 goto err_out;
537
538 ret = -EFAULT;
bf988435 539 if (copy_to_user(useraddr, &info, info_size))
59089d8d
SB		 540 goto err_out;
541
542 if (rule_buf) {
543 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
544 if (copy_to_user(useraddr, rule_buf,
545 info.rule_cnt * sizeof(u32)))
546 goto err_out;
547 }
548 ret = 0;
549
550err_out:
c9caceca 551 kfree(rule_buf);
59089d8d
SB		 552
553 return ret;
0853ad66
SB		 554}
555
a5b6ee29
BH		 556static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
557 void __user *useraddr)
558{
7850f63f
BH		 559 u32 user_size, dev_size;
560 u32 *indir;
a5b6ee29
BH		 561 int ret;
562
7850f63f
BH		 563 if (!dev->ethtool_ops->get_rxfh_indir_size ||
564 !dev->ethtool_ops->get_rxfh_indir)
565 return -EOPNOTSUPP;
566 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
567 if (dev_size == 0)
a5b6ee29
BH		 568 return -EOPNOTSUPP;
569
7850f63f 570 if (copy_from_user(&user_size,
a5b6ee29 571 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 572 sizeof(user_size)))
a5b6ee29
BH		 573 return -EFAULT;
574
7850f63f
BH		 575 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
576 &dev_size, sizeof(dev_size)))
577 return -EFAULT;
578
579 /* If the user buffer size is 0, this is just a query for the
580 * device table size. Otherwise, if it's smaller than the
581 * device table size it's an error.
582 */
583 if (user_size < dev_size)
584 return user_size == 0 ? 0 : -EINVAL;
585
586 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 587 if (!indir)
588 return -ENOMEM;
589
a5b6ee29
BH		 590 ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
591 if (ret)
592 goto out;
593
7850f63f
BH		 594 if (copy_to_user(useraddr +
595 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
596 indir, dev_size * sizeof(indir[0])))
a5b6ee29
BH		 597 ret = -EFAULT;
598
599out:
600 kfree(indir);
601 return ret;
602}
603
604static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
605 void __user *useraddr)
606{
7850f63f
BH		 607 struct ethtool_rxnfc rx_rings;
608 u32 user_size, dev_size, i;
609 u32 *indir;
c03a14e8 610 const struct ethtool_ops *ops = dev->ethtool_ops;
a5b6ee29
BH		 611 int ret;
612
c03a14e8
JP		 613 if (!ops->get_rxfh_indir_size || !ops->set_rxfh_indir ||
614 !ops->get_rxnfc)
7850f63f 615 return -EOPNOTSUPP;
c03a14e8
JP		 616
617 dev_size = ops->get_rxfh_indir_size(dev);
7850f63f 618 if (dev_size == 0)
a5b6ee29
BH		 619 return -EOPNOTSUPP;
620
7850f63f 621 if (copy_from_user(&user_size,
a5b6ee29 622 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 623 sizeof(user_size)))
a5b6ee29
BH		 624 return -EFAULT;
625
278bc429 626 if (user_size != 0 && user_size != dev_size)
7850f63f
BH		 627 return -EINVAL;
628
629 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 630 if (!indir)
631 return -ENOMEM;
632
7850f63f 633 rx_rings.cmd = ETHTOOL_GRXRINGS;
c03a14e8 634 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
7850f63f
BH		 635 if (ret)
636 goto out;
278bc429
BH		 637
638 if (user_size == 0) {
639 for (i = 0; i < dev_size; i++)
640 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
641 } else {
642 if (copy_from_user(indir,
643 useraddr +
644 offsetof(struct ethtool_rxfh_indir,
645 ring_index[0]),
646 dev_size * sizeof(indir[0]))) {
647 ret = -EFAULT;
7850f63f
BH		 648 goto out;
649 }
278bc429
BH		 650
651 /* Validate ring indices */
652 for (i = 0; i < dev_size; i++) {
653 if (indir[i] >= rx_rings.data) {
654 ret = -EINVAL;
655 goto out;
656 }
657 }
7850f63f
BH		 658 }
659
c03a14e8 660 ret = ops->set_rxfh_indir(dev, indir);
a5b6ee29
BH		 661
662out:
663 kfree(indir);
664 return ret;
665}
666
1da177e4
LT		 667static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
668{
669 struct ethtool_regs regs;
76fd8593 670 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 671 void *regbuf;
672 int reglen, ret;
673
674 if (!ops->get_regs || !ops->get_regs_len)
675 return -EOPNOTSUPP;
676
677 if (copy_from_user(&regs, useraddr, sizeof(regs)))
678 return -EFAULT;
679
680 reglen = ops->get_regs_len(dev);
681 if (regs.len > reglen)
682 regs.len = reglen;
683
b7c7d01a 684 regbuf = vzalloc(reglen);
67ae7cf1 685 if (reglen && !regbuf)
1da177e4
LT		 686 return -ENOMEM;
687
688 ops->get_regs(dev, &regs, regbuf);
689
690 ret = -EFAULT;
691 if (copy_to_user(useraddr, &regs, sizeof(regs)))
692 goto out;
693 useraddr += offsetof(struct ethtool_regs, data);
67ae7cf1 694 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1da177e4
LT		 695 goto out;
696 ret = 0;
697
698 out:
a77f5db3 699 vfree(regbuf);
1da177e4
LT		 700 return ret;
701}
702
d73d3a8c
BH		 703static int ethtool_reset(struct net_device *dev, char __user *useraddr)
704{
705 struct ethtool_value reset;
706 int ret;
707
708 if (!dev->ethtool_ops->reset)
709 return -EOPNOTSUPP;
710
711 if (copy_from_user(&reset, useraddr, sizeof(reset)))
712 return -EFAULT;
713
714 ret = dev->ethtool_ops->reset(dev, &reset.data);
715 if (ret)
716 return ret;
717
718 if (copy_to_user(useraddr, &reset, sizeof(reset)))
719 return -EFAULT;
720 return 0;
721}
722
1da177e4
LT		 723static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
724{
8e557421 725 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1da177e4
LT		 726
727 if (!dev->ethtool_ops->get_wol)
728 return -EOPNOTSUPP;
729
730 dev->ethtool_ops->get_wol(dev, &wol);
731
732 if (copy_to_user(useraddr, &wol, sizeof(wol)))
733 return -EFAULT;
734 return 0;
735}
736
737static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
738{
739 struct ethtool_wolinfo wol;
740
741 if (!dev->ethtool_ops->set_wol)
742 return -EOPNOTSUPP;
743
744 if (copy_from_user(&wol, useraddr, sizeof(wol)))
745 return -EFAULT;
746
747 return dev->ethtool_ops->set_wol(dev, &wol);
748}
749
80f12ecc
YM		 750static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
751{
752 struct ethtool_eee edata;
753 int rc;
754
755 if (!dev->ethtool_ops->get_eee)
756 return -EOPNOTSUPP;
757
758 memset(&edata, 0, sizeof(struct ethtool_eee));
759 edata.cmd = ETHTOOL_GEEE;
760 rc = dev->ethtool_ops->get_eee(dev, &edata);
761
762 if (rc)
763 return rc;
764
765 if (copy_to_user(useraddr, &edata, sizeof(edata)))
766 return -EFAULT;
767
768 return 0;
769}
770
771static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
772{
773 struct ethtool_eee edata;
774
775 if (!dev->ethtool_ops->set_eee)
776 return -EOPNOTSUPP;
777
778 if (copy_from_user(&edata, useraddr, sizeof(edata)))
779 return -EFAULT;
780
781 return dev->ethtool_ops->set_eee(dev, &edata);
782}
783
1da177e4
LT		 784static int ethtool_nway_reset(struct net_device *dev)
785{
786 if (!dev->ethtool_ops->nway_reset)
787 return -EOPNOTSUPP;
788
789 return dev->ethtool_ops->nway_reset(dev);
790}
791
e596e6e4
BH		 792static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
793{
794 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
795
796 if (!dev->ethtool_ops->get_link)
797 return -EOPNOTSUPP;
798
799 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
800
801 if (copy_to_user(useraddr, &edata, sizeof(edata)))
802 return -EFAULT;
803 return 0;
804}
805
081d094e
BH		 806static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
807 int (*getter)(struct net_device *,
808 struct ethtool_eeprom *, u8 *),
809 u32 total_len)
1da177e4
LT		 810{
811 struct ethtool_eeprom eeprom;
b131dd5d
MSB		 812 void __user *userbuf = useraddr + sizeof(eeprom);
813 u32 bytes_remaining;
1da177e4 814 u8 *data;
b131dd5d 815 int ret = 0;
1da177e4 816
1da177e4
LT		 817 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
818 return -EFAULT;
819
820 /* Check for wrap and zero */
821 if (eeprom.offset + eeprom.len <= eeprom.offset)
822 return -EINVAL;
823
824 /* Check for exceeding total eeprom len */
081d094e 825 if (eeprom.offset + eeprom.len > total_len)
1da177e4
LT		 826 return -EINVAL;
827
b131dd5d 828 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 829 if (!data)
830 return -ENOMEM;
831
b131dd5d
MSB		 832 bytes_remaining = eeprom.len;
833 while (bytes_remaining > 0) {
834 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
835
081d094e 836 ret = getter(dev, &eeprom, data);
b131dd5d
MSB		 837 if (ret)
838 break;
839 if (copy_to_user(userbuf, data, eeprom.len)) {
840 ret = -EFAULT;
841 break;
842 }
843 userbuf += eeprom.len;
844 eeprom.offset += eeprom.len;
845 bytes_remaining -= eeprom.len;
846 }
1da177e4 847
c5835df9
MSB		 848 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
849 eeprom.offset -= eeprom.len;
850 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
851 ret = -EFAULT;
852
1da177e4
LT		 853 kfree(data);
854 return ret;
855}
856
081d094e
BH		 857static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
858{
859 const struct ethtool_ops *ops = dev->ethtool_ops;
860
861 if (!ops->get_eeprom || !ops->get_eeprom_len)
862 return -EOPNOTSUPP;
863
864 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
865 ops->get_eeprom_len(dev));
866}
867
1da177e4
LT		 868static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
869{
870 struct ethtool_eeprom eeprom;
76fd8593 871 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 872 void __user *userbuf = useraddr + sizeof(eeprom);
873 u32 bytes_remaining;
1da177e4 874 u8 *data;
b131dd5d 875 int ret = 0;
1da177e4
LT		 876
877 if (!ops->set_eeprom || !ops->get_eeprom_len)
878 return -EOPNOTSUPP;
879
880 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
881 return -EFAULT;
882
883 /* Check for wrap and zero */
884 if (eeprom.offset + eeprom.len <= eeprom.offset)
885 return -EINVAL;
886
887 /* Check for exceeding total eeprom len */
888 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
889 return -EINVAL;
890
b131dd5d 891 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 892 if (!data)
893 return -ENOMEM;
894
b131dd5d
MSB		 895 bytes_remaining = eeprom.len;
896 while (bytes_remaining > 0) {
897 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
898
899 if (copy_from_user(data, userbuf, eeprom.len)) {
900 ret = -EFAULT;
901 break;
902 }
903 ret = ops->set_eeprom(dev, &eeprom, data);
904 if (ret)
905 break;
906 userbuf += eeprom.len;
907 eeprom.offset += eeprom.len;
908 bytes_remaining -= eeprom.len;
909 }
1da177e4 910
1da177e4
LT		 911 kfree(data);
912 return ret;
913}
914
97f8aefb 915static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
916 void __user *useraddr)
1da177e4 917{
8e557421 918 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1da177e4
LT		 919
920 if (!dev->ethtool_ops->get_coalesce)
921 return -EOPNOTSUPP;
922
923 dev->ethtool_ops->get_coalesce(dev, &coalesce);
924
925 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
926 return -EFAULT;
927 return 0;
928}
929
97f8aefb 930static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
931 void __user *useraddr)
1da177e4
LT		 932{
933 struct ethtool_coalesce coalesce;
934
fa04ae5c 935 if (!dev->ethtool_ops->set_coalesce)
1da177e4
LT		 936 return -EOPNOTSUPP;
937
938 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
939 return -EFAULT;
940
941 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
942}
943
944static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
945{
8e557421 946 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1da177e4
LT		 947
948 if (!dev->ethtool_ops->get_ringparam)
949 return -EOPNOTSUPP;
950
951 dev->ethtool_ops->get_ringparam(dev, &ringparam);
952
953 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
954 return -EFAULT;
955 return 0;
956}
957
958static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
959{
960 struct ethtool_ringparam ringparam;
961
962 if (!dev->ethtool_ops->set_ringparam)
963 return -EOPNOTSUPP;
964
965 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
966 return -EFAULT;
967
968 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
969}
970
8b5933c3 971static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
972 void __user *useraddr)
973{
974 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
975
976 if (!dev->ethtool_ops->get_channels)
977 return -EOPNOTSUPP;
978
979 dev->ethtool_ops->get_channels(dev, &channels);
980
981 if (copy_to_user(useraddr, &channels, sizeof(channels)))
982 return -EFAULT;
983 return 0;
984}
985
986static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
987 void __user *useraddr)
988{
989 struct ethtool_channels channels;
990
991 if (!dev->ethtool_ops->set_channels)
992 return -EOPNOTSUPP;
993
994 if (copy_from_user(&channels, useraddr, sizeof(channels)))
995 return -EFAULT;
996
997 return dev->ethtool_ops->set_channels(dev, &channels);
998}
999
1da177e4
LT		 1000static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1001{
1002 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1003
1004 if (!dev->ethtool_ops->get_pauseparam)
1005 return -EOPNOTSUPP;
1006
1007 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1008
1009 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1010 return -EFAULT;
1011 return 0;
1012}
1013
1014static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1015{
1016 struct ethtool_pauseparam pauseparam;
1017
e1b90c41 1018 if (!dev->ethtool_ops->set_pauseparam)
1da177e4
LT		 1019 return -EOPNOTSUPP;
1020
1021 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1022 return -EFAULT;
1023
1024 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1025}
1026
1da177e4
LT		 1027static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1028{
1029 struct ethtool_test test;
76fd8593 1030 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1031 u64 *data;
ff03d49f 1032 int ret, test_len;
1da177e4 1033
a9828ec6 1034 if (!ops->self_test || !ops->get_sset_count)
1da177e4
LT		 1035 return -EOPNOTSUPP;
1036
a9828ec6 1037 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
ff03d49f
JG		 1038 if (test_len < 0)
1039 return test_len;
1040 WARN_ON(test_len == 0);
1041
1da177e4
LT		 1042 if (copy_from_user(&test, useraddr, sizeof(test)))
1043 return -EFAULT;
1044
ff03d49f
JG		 1045 test.len = test_len;
1046 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1da177e4
LT		 1047 if (!data)
1048 return -ENOMEM;
1049
1050 ops->self_test(dev, &test, data);
1051
1052 ret = -EFAULT;
1053 if (copy_to_user(useraddr, &test, sizeof(test)))
1054 goto out;
1055 useraddr += sizeof(test);
1056 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1057 goto out;
1058 ret = 0;
1059
1060 out:
1061 kfree(data);
1062 return ret;
1063}
1064
1065static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1066{
1067 struct ethtool_gstrings gstrings;
1da177e4
LT		 1068 u8 *data;
1069 int ret;
1070
1da177e4
LT		 1071 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1072 return -EFAULT;
1073
340ae165 1074 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
a9828ec6
BH		 1075 if (ret < 0)
1076 return ret;
1077
1078 gstrings.len = ret;
1da177e4
LT		 1079
1080 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1081 if (!data)
1082 return -ENOMEM;
1083
340ae165 1084 __ethtool_get_strings(dev, gstrings.string_set, data);
1da177e4
LT		 1085
1086 ret = -EFAULT;
1087 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1088 goto out;
1089 useraddr += sizeof(gstrings);
1090 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1091 goto out;
1092 ret = 0;
1093
340ae165 1094out:
1da177e4
LT		 1095 kfree(data);
1096 return ret;
1097}
1098
1099static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1100{
1101 struct ethtool_value id;
68f512f2 1102 static bool busy;
c03a14e8 1103 const struct ethtool_ops *ops = dev->ethtool_ops;
68f512f2 1104 int rc;
1da177e4 1105
c03a14e8 1106 if (!ops->set_phys_id)
1da177e4
LT		 1107 return -EOPNOTSUPP;
1108
68f512f2
BH		 1109 if (busy)
1110 return -EBUSY;
1111
1da177e4
LT		 1112 if (copy_from_user(&id, useraddr, sizeof(id)))
1113 return -EFAULT;
1114
c03a14e8 1115 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
fce55922 1116 if (rc < 0)
68f512f2
BH		 1117 return rc;
1118
1119 /* Drop the RTNL lock while waiting, but prevent reentry or
1120 * removal of the device.
1121 */
1122 busy = true;
1123 dev_hold(dev);
1124 rtnl_unlock();
1125
1126 if (rc == 0) {
1127 /* Driver will handle this itself */
1128 schedule_timeout_interruptible(
143780c6 1129 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
68f512f2 1130 } else {
fce55922
AB		 1131 /* Driver expects to be called at twice the frequency in rc */
1132 int n = rc * 2, i, interval = HZ / n;
1133
1134 /* Count down seconds */
68f512f2 1135 do {
fce55922
AB		 1136 /* Count down iterations per second */
1137 i = n;
1138 do {
1139 rtnl_lock();
c03a14e8 1140 rc = ops->set_phys_id(dev,
fce55922
AB		 1141 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1142 rtnl_unlock();
1143 if (rc)
1144 break;
1145 schedule_timeout_interruptible(interval);
1146 } while (!signal_pending(current) && --i != 0);
68f512f2
BH		 1147 } while (!signal_pending(current) &&
1148 (id.data == 0 || --id.data != 0));
1149 }
1150
1151 rtnl_lock();
1152 dev_put(dev);
1153 busy = false;
1154
c03a14e8 1155 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
68f512f2 1156 return rc;
1da177e4
LT		 1157}
1158
1159static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1160{
1161 struct ethtool_stats stats;
76fd8593 1162 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1163 u64 *data;
ff03d49f 1164 int ret, n_stats;
1da177e4 1165
a9828ec6 1166 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1da177e4
LT		 1167 return -EOPNOTSUPP;
1168
a9828ec6 1169 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
ff03d49f
JG		 1170 if (n_stats < 0)
1171 return n_stats;
1172 WARN_ON(n_stats == 0);
1173
1da177e4
LT		 1174 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1175 return -EFAULT;
1176
ff03d49f
JG		 1177 stats.n_stats = n_stats;
1178 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1da177e4
LT		 1179 if (!data)
1180 return -ENOMEM;
1181
1182 ops->get_ethtool_stats(dev, &stats, data);
1183
1184 ret = -EFAULT;
1185 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1186 goto out;
1187 useraddr += sizeof(stats);
1188 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1189 goto out;
1190 ret = 0;
1191
1192 out:
1193 kfree(data);
1194 return ret;
1195}
1196
0bf0519d 1197static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
a6f9a705
JW		 1198{
1199 struct ethtool_perm_addr epaddr;
a6f9a705 1200
313674af 1201 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
a6f9a705
JW		 1202 return -EFAULT;
1203
313674af
MW		 1204 if (epaddr.size < dev->addr_len)
1205 return -ETOOSMALL;
1206 epaddr.size = dev->addr_len;
a6f9a705 1207
a6f9a705 1208 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
313674af 1209 return -EFAULT;
a6f9a705 1210 useraddr += sizeof(epaddr);
313674af
MW		 1211 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1212 return -EFAULT;
1213 return 0;
a6f9a705
JW		 1214}
1215
13c99b24
JG		 1216static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1217 u32 cmd, u32 (*actor)(struct net_device *))
3ae7c0b2 1218{
8e557421 1219 struct ethtool_value edata = { .cmd = cmd };
3ae7c0b2 1220
13c99b24 1221 if (!actor)
3ae7c0b2
JG		 1222 return -EOPNOTSUPP;
1223
13c99b24 1224 edata.data = actor(dev);
3ae7c0b2
JG		 1225
1226 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1227 return -EFAULT;
1228 return 0;
1229}
1230
13c99b24
JG		 1231static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1232 void (*actor)(struct net_device *, u32))
3ae7c0b2
JG		 1233{
1234 struct ethtool_value edata;
1235
13c99b24 1236 if (!actor)
3ae7c0b2
JG		 1237 return -EOPNOTSUPP;
1238
1239 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1240 return -EFAULT;
1241
13c99b24 1242 actor(dev, edata.data);
339bf024
JG		 1243 return 0;
1244}
1245
13c99b24
JG		 1246static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1247 int (*actor)(struct net_device *, u32))
339bf024
JG		 1248{
1249 struct ethtool_value edata;
1250
13c99b24 1251 if (!actor)
339bf024
JG		 1252 return -EOPNOTSUPP;
1253
1254 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1255 return -EFAULT;
1256
13c99b24 1257 return actor(dev, edata.data);
339bf024
JG		 1258}
1259
97f8aefb 1260static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1261 char __user *useraddr)
05c6a8d7
AK		 1262{
1263 struct ethtool_flash efl;
1264
1265 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1266 return -EFAULT;
1267
1268 if (!dev->ethtool_ops->flash_device)
1269 return -EOPNOTSUPP;
1270
786f5281
BH		 1271 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
1272
05c6a8d7
AK		 1273 return dev->ethtool_ops->flash_device(dev, &efl);
1274}
1275
29dd54b7
AC		 1276static int ethtool_set_dump(struct net_device *dev,
1277 void __user *useraddr)
1278{
1279 struct ethtool_dump dump;
1280
1281 if (!dev->ethtool_ops->set_dump)
1282 return -EOPNOTSUPP;
1283
1284 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1285 return -EFAULT;
1286
1287 return dev->ethtool_ops->set_dump(dev, &dump);
1288}
1289
1290static int ethtool_get_dump_flag(struct net_device *dev,
1291 void __user *useraddr)
1292{
1293 int ret;
1294 struct ethtool_dump dump;
1295 const struct ethtool_ops *ops = dev->ethtool_ops;
1296
c03a14e8 1297 if (!ops->get_dump_flag)
29dd54b7
AC		 1298 return -EOPNOTSUPP;
1299
1300 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1301 return -EFAULT;
1302
1303 ret = ops->get_dump_flag(dev, &dump);
1304 if (ret)
1305 return ret;
1306
1307 if (copy_to_user(useraddr, &dump, sizeof(dump)))
1308 return -EFAULT;
1309 return 0;
1310}
1311
1312static int ethtool_get_dump_data(struct net_device *dev,
1313 void __user *useraddr)
1314{
1315 int ret;
1316 __u32 len;
1317 struct ethtool_dump dump, tmp;
1318 const struct ethtool_ops *ops = dev->ethtool_ops;
1319 void *data = NULL;
1320
c03a14e8 1321 if (!ops->get_dump_data || !ops->get_dump_flag)
29dd54b7
AC		 1322 return -EOPNOTSUPP;
1323
1324 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1325 return -EFAULT;
1326
1327 memset(&tmp, 0, sizeof(tmp));
1328 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
1329 ret = ops->get_dump_flag(dev, &tmp);
1330 if (ret)
1331 return ret;
1332
c590b5e2 1333 len = min(tmp.len, dump.len);
29dd54b7
AC		 1334 if (!len)
1335 return -EFAULT;
1336
c590b5e2
MS		 1337 /* Don't ever let the driver think there's more space available
1338 * than it requested with .get_dump_flag().
1339 */
1340 dump.len = len;
1341
1342 /* Always allocate enough space to hold the whole thing so that the
1343 * driver does not need to check the length and bother with partial
1344 * dumping.
1345 */
29dd54b7
AC		 1346 data = vzalloc(tmp.len);
1347 if (!data)
1348 return -ENOMEM;
1349 ret = ops->get_dump_data(dev, &dump, data);
1350 if (ret)
1351 goto out;
1352
c590b5e2
MS		 1353 /* There are two sane possibilities:
1354 * 1. The driver's .get_dump_data() does not touch dump.len.
1355 * 2. Or it may set dump.len to how much it really writes, which
1356 * should be tmp.len (or len if it can do a partial dump).
1357 * In any case respond to userspace with the actual length of data
1358 * it's receiving.
1359 */
1360 WARN_ON(dump.len != len && dump.len != tmp.len);
1361 dump.len = len;
1362
29dd54b7
AC		 1363 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
1364 ret = -EFAULT;
1365 goto out;
1366 }
1367 useraddr += offsetof(struct ethtool_dump, data);
1368 if (copy_to_user(useraddr, data, len))
1369 ret = -EFAULT;
1370out:
1371 vfree(data);
1372 return ret;
1373}
1374
c8f3a8c3
RC		 1375static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
1376{
1377 int err = 0;
1378 struct ethtool_ts_info info;
1379 const struct ethtool_ops *ops = dev->ethtool_ops;
1380 struct phy_device *phydev = dev->phydev;
1381
1382 memset(&info, 0, sizeof(info));
1383 info.cmd = ETHTOOL_GET_TS_INFO;
1384
1385 if (phydev && phydev->drv && phydev->drv->ts_info) {
c8f3a8c3 1386 err = phydev->drv->ts_info(phydev, &info);
c03a14e8 1387 } else if (ops->get_ts_info) {
c8f3a8c3 1388 err = ops->get_ts_info(dev, &info);
c8f3a8c3
RC		 1389 } else {
1390 info.so_timestamping =
1391 SOF_TIMESTAMPING_RX_SOFTWARE |
1392 SOF_TIMESTAMPING_SOFTWARE;
1393 info.phc_index = -1;
1394 }
1395
1396 if (err)
1397 return err;
1398
1399 if (copy_to_user(useraddr, &info, sizeof(info)))
1400 err = -EFAULT;
1401
1402 return err;
1403}
1404
41c3cb6d
SH		 1405static int ethtool_get_module_info(struct net_device *dev,
1406 void __user *useraddr)
1407{
1408 int ret;
1409 struct ethtool_modinfo modinfo;
1410 const struct ethtool_ops *ops = dev->ethtool_ops;
1411
1412 if (!ops->get_module_info)
1413 return -EOPNOTSUPP;
1414
1415 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
1416 return -EFAULT;
1417
1418 ret = ops->get_module_info(dev, &modinfo);
1419 if (ret)
1420 return ret;
1421
1422 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
1423 return -EFAULT;
1424
1425 return 0;
1426}
1427
1428static int ethtool_get_module_eeprom(struct net_device *dev,
1429 void __user *useraddr)
1430{
1431 int ret;
1432 struct ethtool_modinfo modinfo;
1433 const struct ethtool_ops *ops = dev->ethtool_ops;
1434
1435 if (!ops->get_module_info || !ops->get_module_eeprom)
1436 return -EOPNOTSUPP;
1437
1438 ret = ops->get_module_info(dev, &modinfo);
1439 if (ret)
1440 return ret;
1441
1442 return ethtool_get_any_eeprom(dev, useraddr, ops->get_module_eeprom,
1443 modinfo.eeprom_len);
1444}
1445
600fed5e 1446/* The main entry point in this file. Called from net/core/dev_ioctl.c */
1da177e4 1447
881d966b 1448int dev_ethtool(struct net *net, struct ifreq *ifr)
1da177e4 1449{
881d966b 1450 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1da177e4
LT		 1451 void __user *useraddr = ifr->ifr_data;
1452 u32 ethcmd;
1453 int rc;
b29d3145 1454 netdev_features_t old_features;
1da177e4 1455
1da177e4
LT		 1456 if (!dev || !netif_device_present(dev))
1457 return -ENODEV;
1458
97f8aefb 1459 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1da177e4
LT		 1460 return -EFAULT;
1461
75f3123c 1462 /* Allow some commands to be done by anyone */
97f8aefb 1463 switch (ethcmd) {
0fdc100b 1464 case ETHTOOL_GSET:
75f3123c 1465 case ETHTOOL_GDRVINFO:
75f3123c 1466 case ETHTOOL_GMSGLVL:
2da45db2 1467 case ETHTOOL_GLINK:
75f3123c
SH		 1468 case ETHTOOL_GCOALESCE:
1469 case ETHTOOL_GRINGPARAM:
1470 case ETHTOOL_GPAUSEPARAM:
1471 case ETHTOOL_GRXCSUM:
1472 case ETHTOOL_GTXCSUM:
1473 case ETHTOOL_GSG:
f80400a2 1474 case ETHTOOL_GSSET_INFO:
75f3123c 1475 case ETHTOOL_GSTRINGS:
2da45db2 1476 case ETHTOOL_GSTATS:
75f3123c
SH		 1477 case ETHTOOL_GTSO:
1478 case ETHTOOL_GPERMADDR:
1479 case ETHTOOL_GUFO:
1480 case ETHTOOL_GGSO:
1cab819b 1481 case ETHTOOL_GGRO:
339bf024
JG		 1482 case ETHTOOL_GFLAGS:
1483 case ETHTOOL_GPFLAGS:
0853ad66 1484 case ETHTOOL_GRXFH:
59089d8d
SB		 1485 case ETHTOOL_GRXRINGS:
1486 case ETHTOOL_GRXCLSRLCNT:
1487 case ETHTOOL_GRXCLSRULE:
1488 case ETHTOOL_GRXCLSRLALL:
2da45db2 1489 case ETHTOOL_GRXFHINDIR:
5455c699 1490 case ETHTOOL_GFEATURES:
2da45db2 1491 case ETHTOOL_GCHANNELS:
c8f3a8c3 1492 case ETHTOOL_GET_TS_INFO:
2da45db2 1493 case ETHTOOL_GEEE:
75f3123c
SH		 1494 break;
1495 default:
5e1fccc0 1496 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
75f3123c
SH		 1497 return -EPERM;
1498 }
1499
97f8aefb 1500 if (dev->ethtool_ops->begin) {
1501 rc = dev->ethtool_ops->begin(dev);
1502 if (rc < 0)
1da177e4 1503 return rc;
97f8aefb 1504 }
d8a33ac4
SH		 1505 old_features = dev->features;
1506
1da177e4
LT		 1507 switch (ethcmd) {
1508 case ETHTOOL_GSET:
1509 rc = ethtool_get_settings(dev, useraddr);
1510 break;
1511 case ETHTOOL_SSET:
1512 rc = ethtool_set_settings(dev, useraddr);
1513 break;
1514 case ETHTOOL_GDRVINFO:
1515 rc = ethtool_get_drvinfo(dev, useraddr);
1da177e4
LT		 1516 break;
1517 case ETHTOOL_GREGS:
1518 rc = ethtool_get_regs(dev, useraddr);
1519 break;
1520 case ETHTOOL_GWOL:
1521 rc = ethtool_get_wol(dev, useraddr);
1522 break;
1523 case ETHTOOL_SWOL:
1524 rc = ethtool_set_wol(dev, useraddr);
1525 break;
1526 case ETHTOOL_GMSGLVL:
13c99b24
JG		 1527 rc = ethtool_get_value(dev, useraddr, ethcmd,
1528 dev->ethtool_ops->get_msglevel);
1da177e4
LT		 1529 break;
1530 case ETHTOOL_SMSGLVL:
13c99b24
JG		 1531 rc = ethtool_set_value_void(dev, useraddr,
1532 dev->ethtool_ops->set_msglevel);
1da177e4 1533 break;
80f12ecc
YM		 1534 case ETHTOOL_GEEE:
1535 rc = ethtool_get_eee(dev, useraddr);
1536 break;
1537 case ETHTOOL_SEEE:
1538 rc = ethtool_set_eee(dev, useraddr);
1539 break;
1da177e4
LT		 1540 case ETHTOOL_NWAY_RST:
1541 rc = ethtool_nway_reset(dev);
1542 break;
1543 case ETHTOOL_GLINK:
e596e6e4 1544 rc = ethtool_get_link(dev, useraddr);
1da177e4
LT		 1545 break;
1546 case ETHTOOL_GEEPROM:
1547 rc = ethtool_get_eeprom(dev, useraddr);
1548 break;
1549 case ETHTOOL_SEEPROM:
1550 rc = ethtool_set_eeprom(dev, useraddr);
1551 break;
1552 case ETHTOOL_GCOALESCE:
1553 rc = ethtool_get_coalesce(dev, useraddr);
1554 break;
1555 case ETHTOOL_SCOALESCE:
1556 rc = ethtool_set_coalesce(dev, useraddr);
1557 break;
1558 case ETHTOOL_GRINGPARAM:
1559 rc = ethtool_get_ringparam(dev, useraddr);
1560 break;
1561 case ETHTOOL_SRINGPARAM:
1562 rc = ethtool_set_ringparam(dev, useraddr);
1563 break;
1564 case ETHTOOL_GPAUSEPARAM:
1565 rc = ethtool_get_pauseparam(dev, useraddr);
1566 break;
1567 case ETHTOOL_SPAUSEPARAM:
1568 rc = ethtool_set_pauseparam(dev, useraddr);
1569 break;
1da177e4
LT		 1570 case ETHTOOL_TEST:
1571 rc = ethtool_self_test(dev, useraddr);
1572 break;
1573 case ETHTOOL_GSTRINGS:
1574 rc = ethtool_get_strings(dev, useraddr);
1575 break;
1576 case ETHTOOL_PHYS_ID:
1577 rc = ethtool_phys_id(dev, useraddr);
1578 break;
1579 case ETHTOOL_GSTATS:
1580 rc = ethtool_get_stats(dev, useraddr);
1581 break;
a6f9a705
JW		 1582 case ETHTOOL_GPERMADDR:
1583 rc = ethtool_get_perm_addr(dev, useraddr);
1584 break;
3ae7c0b2 1585 case ETHTOOL_GFLAGS:
13c99b24 1586 rc = ethtool_get_value(dev, useraddr, ethcmd,
bc5787c6 1587 __ethtool_get_flags);
3ae7c0b2
JG		 1588 break;
1589 case ETHTOOL_SFLAGS:
da8ac86c 1590 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3ae7c0b2 1591 break;
339bf024 1592 case ETHTOOL_GPFLAGS:
13c99b24
JG		 1593 rc = ethtool_get_value(dev, useraddr, ethcmd,
1594 dev->ethtool_ops->get_priv_flags);
339bf024
JG		 1595 break;
1596 case ETHTOOL_SPFLAGS:
13c99b24
JG		 1597 rc = ethtool_set_value(dev, useraddr,
1598 dev->ethtool_ops->set_priv_flags);
339bf024 1599 break;
0853ad66 1600 case ETHTOOL_GRXFH:
59089d8d
SB		 1601 case ETHTOOL_GRXRINGS:
1602 case ETHTOOL_GRXCLSRLCNT:
1603 case ETHTOOL_GRXCLSRULE:
1604 case ETHTOOL_GRXCLSRLALL:
bf988435 1605 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
0853ad66
SB		 1606 break;
1607 case ETHTOOL_SRXFH:
59089d8d
SB		 1608 case ETHTOOL_SRXCLSRLDEL:
1609 case ETHTOOL_SRXCLSRLINS:
bf988435 1610 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
0853ad66 1611 break;
05c6a8d7
AK		 1612 case ETHTOOL_FLASHDEV:
1613 rc = ethtool_flash_device(dev, useraddr);
1614 break;
d73d3a8c
BH		 1615 case ETHTOOL_RESET:
1616 rc = ethtool_reset(dev, useraddr);
1617 break;
723b2f57
JG		 1618 case ETHTOOL_GSSET_INFO:
1619 rc = ethtool_get_sset_info(dev, useraddr);
1620 break;
a5b6ee29
BH		 1621 case ETHTOOL_GRXFHINDIR:
1622 rc = ethtool_get_rxfh_indir(dev, useraddr);
1623 break;
1624 case ETHTOOL_SRXFHINDIR:
1625 rc = ethtool_set_rxfh_indir(dev, useraddr);
1626 break;
5455c699
MM		 1627 case ETHTOOL_GFEATURES:
1628 rc = ethtool_get_features(dev, useraddr);
1629 break;
1630 case ETHTOOL_SFEATURES:
1631 rc = ethtool_set_features(dev, useraddr);
1632 break;
0a417704 1633 case ETHTOOL_GTXCSUM:
e83d360d 1634 case ETHTOOL_GRXCSUM:
0a417704
MM		 1635 case ETHTOOL_GSG:
1636 case ETHTOOL_GTSO:
1637 case ETHTOOL_GUFO:
1638 case ETHTOOL_GGSO:
1639 case ETHTOOL_GGRO:
1640 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
1641 break;
1642 case ETHTOOL_STXCSUM:
e83d360d 1643 case ETHTOOL_SRXCSUM:
0a417704
MM		 1644 case ETHTOOL_SSG:
1645 case ETHTOOL_STSO:
1646 case ETHTOOL_SUFO:
1647 case ETHTOOL_SGSO:
1648 case ETHTOOL_SGRO:
1649 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
1650 break;
8b5933c3 1651 case ETHTOOL_GCHANNELS:
1652 rc = ethtool_get_channels(dev, useraddr);
1653 break;
1654 case ETHTOOL_SCHANNELS:
1655 rc = ethtool_set_channels(dev, useraddr);
1656 break;
29dd54b7
AC		 1657 case ETHTOOL_SET_DUMP:
1658 rc = ethtool_set_dump(dev, useraddr);
1659 break;
1660 case ETHTOOL_GET_DUMP_FLAG:
1661 rc = ethtool_get_dump_flag(dev, useraddr);
1662 break;
1663 case ETHTOOL_GET_DUMP_DATA:
1664 rc = ethtool_get_dump_data(dev, useraddr);
1665 break;
c8f3a8c3
RC		 1666 case ETHTOOL_GET_TS_INFO:
1667 rc = ethtool_get_ts_info(dev, useraddr);
1668 break;
41c3cb6d
SH		 1669 case ETHTOOL_GMODULEINFO:
1670 rc = ethtool_get_module_info(dev, useraddr);
1671 break;
1672 case ETHTOOL_GMODULEEEPROM:
1673 rc = ethtool_get_module_eeprom(dev, useraddr);
1674 break;
1da177e4 1675 default:
61a44b9c 1676 rc = -EOPNOTSUPP;
1da177e4 1677 }
4ec93edb 1678
e71a4783 1679 if (dev->ethtool_ops->complete)
1da177e4 1680 dev->ethtool_ops->complete(dev);
d8a33ac4
SH		 1681
1682 if (old_features != dev->features)
1683 netdev_features_change(dev);
1684
1da177e4 1685 return rc;
1da177e4 1686}
Linux kernel - Deliverables
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