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[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",
63 [NETIF_F_HW_VLAN_TX_BIT] = "tx-vlan-hw-insert",
64
65 [NETIF_F_HW_VLAN_RX_BIT] = "rx-vlan-hw-parse",
66 [NETIF_F_HW_VLAN_FILTER_BIT] = "rx-vlan-filter",
67 [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged",
68 [NETIF_F_GSO_BIT] = "tx-generic-segmentation",
69 [NETIF_F_LLTX_BIT] = "tx-lockless",
70 [NETIF_F_NETNS_LOCAL_BIT] = "netns-local",
71 [NETIF_F_GRO_BIT] = "rx-gro",
72 [NETIF_F_LRO_BIT] = "rx-lro",
73
74 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation",
75 [NETIF_F_UFO_BIT] = "tx-udp-fragmentation",
76 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
77 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
78 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
79 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
80
81 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
82 [NETIF_F_SCTP_CSUM_BIT] = "tx-checksum-sctp",
83 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
84 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
85 [NETIF_F_RXHASH_BIT] = "rx-hashing",
86 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
87 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
88 [NETIF_F_LOOPBACK_BIT] = "loopback",
36eabda3 89 [NETIF_F_RXFCS_BIT] = "rx-fcs",
5e0c03c8 90 [NETIF_F_RXALL_BIT] = "rx-all",
9d921549
MM		 91};
92
5455c699
MM		 93static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
94{
95 struct ethtool_gfeatures cmd = {
96 .cmd = ETHTOOL_GFEATURES,
97 .size = ETHTOOL_DEV_FEATURE_WORDS,
98 };
475414f6 99 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
5455c699
MM		 100 u32 __user *sizeaddr;
101 u32 copy_size;
475414f6
MM		 102 int i;
103
104 /* in case feature bits run out again */
09da71b1 105 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
475414f6
MM		 106
107 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 108 features[i].available = (u32)(dev->hw_features >> (32 * i));
109 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
110 features[i].active = (u32)(dev->features >> (32 * i));
111 features[i].never_changed =
112 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
475414f6 113 }
5455c699
MM		 114
115 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
116 if (get_user(copy_size, sizeaddr))
117 return -EFAULT;
118
119 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
120 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
121
122 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
123 return -EFAULT;
124 useraddr += sizeof(cmd);
125 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
126 return -EFAULT;
127
128 return 0;
129}
130
131static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
132{
133 struct ethtool_sfeatures cmd;
134 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
475414f6
MM		 135 netdev_features_t wanted = 0, valid = 0;
136 int i, ret = 0;
5455c699
MM		 137
138 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
139 return -EFAULT;
140 useraddr += sizeof(cmd);
141
142 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
143 return -EINVAL;
144
145 if (copy_from_user(features, useraddr, sizeof(features)))
146 return -EFAULT;
147
475414f6 148 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 149 valid |= (netdev_features_t)features[i].valid << (32 * i);
150 wanted |= (netdev_features_t)features[i].requested << (32 * i);
475414f6
MM		 151 }
152
153 if (valid & ~NETIF_F_ETHTOOL_BITS)
5455c699
MM		 154 return -EINVAL;
155
475414f6
MM		 156 if (valid & ~dev->hw_features) {
157 valid &= dev->hw_features;
5455c699
MM		 158 ret |= ETHTOOL_F_UNSUPPORTED;
159 }
160
475414f6
MM		 161 dev->wanted_features &= ~valid;
162 dev->wanted_features |= wanted & valid;
6cb6a27c 163 __netdev_update_features(dev);
5455c699 164
475414f6 165 if ((dev->wanted_features ^ dev->features) & valid)
5455c699
MM		 166 ret |= ETHTOOL_F_WISH;
167
168 return ret;
169}
170
340ae165
MM		 171static int __ethtool_get_sset_count(struct net_device *dev, int sset)
172{
173 const struct ethtool_ops *ops = dev->ethtool_ops;
174
5455c699
MM		 175 if (sset == ETH_SS_FEATURES)
176 return ARRAY_SIZE(netdev_features_strings);
177
340ae165
MM		 178 if (ops && ops->get_sset_count && ops->get_strings)
179 return ops->get_sset_count(dev, sset);
180 else
181 return -EOPNOTSUPP;
182}
183
184static void __ethtool_get_strings(struct net_device *dev,
185 u32 stringset, u8 *data)
186{
187 const struct ethtool_ops *ops = dev->ethtool_ops;
188
5455c699
MM		 189 if (stringset == ETH_SS_FEATURES)
190 memcpy(data, netdev_features_strings,
191 sizeof(netdev_features_strings));
192 else
193 /* ops->get_strings is valid because checked earlier */
194 ops->get_strings(dev, stringset, data);
340ae165
MM		 195}
196
c8f44aff 197static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
0a417704
MM		 198{
199 /* feature masks of legacy discrete ethtool ops */
200
201 switch (eth_cmd) {
202 case ETHTOOL_GTXCSUM:
203 case ETHTOOL_STXCSUM:
204 return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM;
e83d360d
MM		 205 case ETHTOOL_GRXCSUM:
206 case ETHTOOL_SRXCSUM:
207 return NETIF_F_RXCSUM;
0a417704
MM		 208 case ETHTOOL_GSG:
209 case ETHTOOL_SSG:
210 return NETIF_F_SG;
211 case ETHTOOL_GTSO:
212 case ETHTOOL_STSO:
213 return NETIF_F_ALL_TSO;
214 case ETHTOOL_GUFO:
215 case ETHTOOL_SUFO:
216 return NETIF_F_UFO;
217 case ETHTOOL_GGSO:
218 case ETHTOOL_SGSO:
219 return NETIF_F_GSO;
220 case ETHTOOL_GGRO:
221 case ETHTOOL_SGRO:
222 return NETIF_F_GRO;
223 default:
224 BUG();
225 }
226}
227
0a417704
MM		 228static int ethtool_get_one_feature(struct net_device *dev,
229 char __user *useraddr, u32 ethcmd)
230{
c8f44aff 231 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
0a417704
MM		 232 struct ethtool_value edata = {
233 .cmd = ethcmd,
86794881 234 .data = !!(dev->features & mask),
0a417704 235 };
0a417704 236
0a417704
MM		 237 if (copy_to_user(useraddr, &edata, sizeof(edata)))
238 return -EFAULT;
239 return 0;
240}
241
0a417704
MM		 242static int ethtool_set_one_feature(struct net_device *dev,
243 void __user *useraddr, u32 ethcmd)
244{
245 struct ethtool_value edata;
c8f44aff 246 netdev_features_t mask;
0a417704
MM		 247
248 if (copy_from_user(&edata, useraddr, sizeof(edata)))
249 return -EFAULT;
250
86794881
MM		 251 mask = ethtool_get_feature_mask(ethcmd);
252 mask &= dev->hw_features;
bc5787c6
MM		 253 if (!mask)
254 return -EOPNOTSUPP;
86794881 255
bc5787c6
MM		 256 if (edata.data)
257 dev->wanted_features |= mask;
258 else
259 dev->wanted_features &= ~mask;
86794881 260
bc5787c6 261 __netdev_update_features(dev);
86794881 262
bc5787c6
MM		 263 return 0;
264}
265
02b3a552
MM		 266#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
267 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
268#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_RX | \
269 NETIF_F_HW_VLAN_TX | NETIF_F_NTUPLE | NETIF_F_RXHASH)
bc5787c6
MM		 270
271static u32 __ethtool_get_flags(struct net_device *dev)
272{
02b3a552
MM		 273 u32 flags = 0;
274
275 if (dev->features & NETIF_F_LRO) flags |= ETH_FLAG_LRO;
276 if (dev->features & NETIF_F_HW_VLAN_RX) flags |= ETH_FLAG_RXVLAN;
277 if (dev->features & NETIF_F_HW_VLAN_TX) flags |= ETH_FLAG_TXVLAN;
278 if (dev->features & NETIF_F_NTUPLE) flags |= ETH_FLAG_NTUPLE;
279 if (dev->features & NETIF_F_RXHASH) flags |= ETH_FLAG_RXHASH;
280
281 return flags;
0a417704
MM		 282}
283
bc5787c6 284static int __ethtool_set_flags(struct net_device *dev, u32 data)
da8ac86c 285{
c8f44aff 286 netdev_features_t features = 0, changed;
da8ac86c 287
02b3a552 288 if (data & ~ETH_ALL_FLAGS)
da8ac86c
MM		 289 return -EINVAL;
290
02b3a552
MM		 291 if (data & ETH_FLAG_LRO) features |= NETIF_F_LRO;
292 if (data & ETH_FLAG_RXVLAN) features |= NETIF_F_HW_VLAN_RX;
293 if (data & ETH_FLAG_TXVLAN) features |= NETIF_F_HW_VLAN_TX;
294 if (data & ETH_FLAG_NTUPLE) features |= NETIF_F_NTUPLE;
295 if (data & ETH_FLAG_RXHASH) features |= NETIF_F_RXHASH;
296
da8ac86c 297 /* allow changing only bits set in hw_features */
02b3a552 298 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
da8ac86c
MM		 299 if (changed & ~dev->hw_features)
300 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
301
302 dev->wanted_features =
02b3a552 303 (dev->wanted_features & ~changed) | (features & changed);
da8ac86c 304
6cb6a27c 305 __netdev_update_features(dev);
da8ac86c
MM		 306
307 return 0;
308}
309
4bc71cb9 310int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1da177e4 311{
4bc71cb9 312 ASSERT_RTNL();
1da177e4 313
4bc71cb9 314 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
1da177e4
LT		 315 return -EOPNOTSUPP;
316
4bc71cb9
JP		 317 memset(cmd, 0, sizeof(struct ethtool_cmd));
318 cmd->cmd = ETHTOOL_GSET;
319 return dev->ethtool_ops->get_settings(dev, cmd);
320}
321EXPORT_SYMBOL(__ethtool_get_settings);
322
323static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
324{
325 int err;
326 struct ethtool_cmd cmd;
327
328 err = __ethtool_get_settings(dev, &cmd);
1da177e4
LT		 329 if (err < 0)
330 return err;
331
332 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
333 return -EFAULT;
334 return 0;
335}
336
337static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
338{
339 struct ethtool_cmd cmd;
340
341 if (!dev->ethtool_ops->set_settings)
342 return -EOPNOTSUPP;
343
344 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
345 return -EFAULT;
346
347 return dev->ethtool_ops->set_settings(dev, &cmd);
348}
349
97f8aefb 350static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
351 void __user *useraddr)
1da177e4
LT		 352{
353 struct ethtool_drvinfo info;
76fd8593 354 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 355
1da177e4
LT		 356 memset(&info, 0, sizeof(info));
357 info.cmd = ETHTOOL_GDRVINFO;
01414802
BH		 358 if (ops && ops->get_drvinfo) {
359 ops->get_drvinfo(dev, &info);
360 } else if (dev->dev.parent && dev->dev.parent->driver) {
361 strlcpy(info.bus_info, dev_name(dev->dev.parent),
362 sizeof(info.bus_info));
363 strlcpy(info.driver, dev->dev.parent->driver->name,
364 sizeof(info.driver));
365 } else {
366 return -EOPNOTSUPP;
367 }
1da177e4 368
723b2f57
JG		 369 /*
370 * this method of obtaining string set info is deprecated;
d17792eb 371 * Use ETHTOOL_GSSET_INFO instead.
723b2f57 372 */
01414802 373 if (ops && ops->get_sset_count) {
ff03d49f
JG		 374 int rc;
375
376 rc = ops->get_sset_count(dev, ETH_SS_TEST);
377 if (rc >= 0)
378 info.testinfo_len = rc;
379 rc = ops->get_sset_count(dev, ETH_SS_STATS);
380 if (rc >= 0)
381 info.n_stats = rc;
339bf024
JG		 382 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
383 if (rc >= 0)
384 info.n_priv_flags = rc;
ff03d49f 385 }
01414802 386 if (ops && ops->get_regs_len)
1da177e4 387 info.regdump_len = ops->get_regs_len(dev);
01414802 388 if (ops && ops->get_eeprom_len)
1da177e4
LT		 389 info.eedump_len = ops->get_eeprom_len(dev);
390
391 if (copy_to_user(useraddr, &info, sizeof(info)))
392 return -EFAULT;
393 return 0;
394}
395
f5c445ed 396static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
97f8aefb 397 void __user *useraddr)
723b2f57
JG		 398{
399 struct ethtool_sset_info info;
723b2f57
JG		 400 u64 sset_mask;
401 int i, idx = 0, n_bits = 0, ret, rc;
402 u32 *info_buf = NULL;
403
723b2f57
JG		 404 if (copy_from_user(&info, useraddr, sizeof(info)))
405 return -EFAULT;
406
407 /* store copy of mask, because we zero struct later on */
408 sset_mask = info.sset_mask;
409 if (!sset_mask)
410 return 0;
411
412 /* calculate size of return buffer */
d17792eb 413 n_bits = hweight64(sset_mask);
723b2f57
JG		 414
415 memset(&info, 0, sizeof(info));
416 info.cmd = ETHTOOL_GSSET_INFO;
417
418 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
419 if (!info_buf)
420 return -ENOMEM;
421
422 /*
423 * fill return buffer based on input bitmask and successful
424 * get_sset_count return
425 */
426 for (i = 0; i < 64; i++) {
427 if (!(sset_mask & (1ULL << i)))
428 continue;
429
340ae165 430 rc = __ethtool_get_sset_count(dev, i);
723b2f57
JG		 431 if (rc >= 0) {
432 info.sset_mask |= (1ULL << i);
433 info_buf[idx++] = rc;
434 }
435 }
436
437 ret = -EFAULT;
438 if (copy_to_user(useraddr, &info, sizeof(info)))
439 goto out;
440
441 useraddr += offsetof(struct ethtool_sset_info, data);
442 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
443 goto out;
444
445 ret = 0;
446
447out:
448 kfree(info_buf);
449 return ret;
450}
451
97f8aefb 452static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
bf988435 453 u32 cmd, void __user *useraddr)
0853ad66 454{
bf988435
BH		 455 struct ethtool_rxnfc info;
456 size_t info_size = sizeof(info);
55664f32 457 int rc;
0853ad66 458
59089d8d 459 if (!dev->ethtool_ops->set_rxnfc)
0853ad66
SB		 460 return -EOPNOTSUPP;
461
bf988435
BH		 462 /* struct ethtool_rxnfc was originally defined for
463 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
464 * members. User-space might still be using that
465 * definition. */
466 if (cmd == ETHTOOL_SRXFH)
467 info_size = (offsetof(struct ethtool_rxnfc, data) +
468 sizeof(info.data));
469
470 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 471 return -EFAULT;
472
55664f32
BH		 473 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
474 if (rc)
475 return rc;
476
477 if (cmd == ETHTOOL_SRXCLSRLINS &&
478 copy_to_user(useraddr, &info, info_size))
479 return -EFAULT;
480
481 return 0;
0853ad66
SB		 482}
483
97f8aefb 484static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
bf988435 485 u32 cmd, void __user *useraddr)
0853ad66
SB		 486{
487 struct ethtool_rxnfc info;
bf988435 488 size_t info_size = sizeof(info);
59089d8d
SB		 489 const struct ethtool_ops *ops = dev->ethtool_ops;
490 int ret;
491 void *rule_buf = NULL;
0853ad66 492
59089d8d 493 if (!ops->get_rxnfc)
0853ad66
SB		 494 return -EOPNOTSUPP;
495
bf988435
BH		 496 /* struct ethtool_rxnfc was originally defined for
497 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
498 * members. User-space might still be using that
499 * definition. */
500 if (cmd == ETHTOOL_GRXFH)
501 info_size = (offsetof(struct ethtool_rxnfc, data) +
502 sizeof(info.data));
503
504 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 505 return -EFAULT;
506
59089d8d
SB		 507 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
508 if (info.rule_cnt > 0) {
db048b69 509 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
ae6df5f9 510 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
db048b69 511 GFP_USER);
59089d8d
SB		 512 if (!rule_buf)
513 return -ENOMEM;
514 }
515 }
0853ad66 516
59089d8d
SB		 517 ret = ops->get_rxnfc(dev, &info, rule_buf);
518 if (ret < 0)
519 goto err_out;
520
521 ret = -EFAULT;
bf988435 522 if (copy_to_user(useraddr, &info, info_size))
59089d8d
SB		 523 goto err_out;
524
525 if (rule_buf) {
526 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
527 if (copy_to_user(useraddr, rule_buf,
528 info.rule_cnt * sizeof(u32)))
529 goto err_out;
530 }
531 ret = 0;
532
533err_out:
c9caceca 534 kfree(rule_buf);
59089d8d
SB		 535
536 return ret;
0853ad66
SB		 537}
538
a5b6ee29
BH		 539static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
540 void __user *useraddr)
541{
7850f63f
BH		 542 u32 user_size, dev_size;
543 u32 *indir;
a5b6ee29
BH		 544 int ret;
545
7850f63f
BH		 546 if (!dev->ethtool_ops->get_rxfh_indir_size ||
547 !dev->ethtool_ops->get_rxfh_indir)
548 return -EOPNOTSUPP;
549 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
550 if (dev_size == 0)
a5b6ee29
BH		 551 return -EOPNOTSUPP;
552
7850f63f 553 if (copy_from_user(&user_size,
a5b6ee29 554 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 555 sizeof(user_size)))
a5b6ee29
BH		 556 return -EFAULT;
557
7850f63f
BH		 558 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
559 &dev_size, sizeof(dev_size)))
560 return -EFAULT;
561
562 /* If the user buffer size is 0, this is just a query for the
563 * device table size. Otherwise, if it's smaller than the
564 * device table size it's an error.
565 */
566 if (user_size < dev_size)
567 return user_size == 0 ? 0 : -EINVAL;
568
569 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 570 if (!indir)
571 return -ENOMEM;
572
a5b6ee29
BH		 573 ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
574 if (ret)
575 goto out;
576
7850f63f
BH		 577 if (copy_to_user(useraddr +
578 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
579 indir, dev_size * sizeof(indir[0])))
a5b6ee29
BH		 580 ret = -EFAULT;
581
582out:
583 kfree(indir);
584 return ret;
585}
586
587static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
588 void __user *useraddr)
589{
7850f63f
BH		 590 struct ethtool_rxnfc rx_rings;
591 u32 user_size, dev_size, i;
592 u32 *indir;
a5b6ee29
BH		 593 int ret;
594
7850f63f
BH		 595 if (!dev->ethtool_ops->get_rxfh_indir_size ||
596 !dev->ethtool_ops->set_rxfh_indir ||
597 !dev->ethtool_ops->get_rxnfc)
598 return -EOPNOTSUPP;
599 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
600 if (dev_size == 0)
a5b6ee29
BH		 601 return -EOPNOTSUPP;
602
7850f63f 603 if (copy_from_user(&user_size,
a5b6ee29 604 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 605 sizeof(user_size)))
a5b6ee29
BH		 606 return -EFAULT;
607
278bc429 608 if (user_size != 0 && user_size != dev_size)
7850f63f
BH		 609 return -EINVAL;
610
611 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 612 if (!indir)
613 return -ENOMEM;
614
7850f63f
BH		 615 rx_rings.cmd = ETHTOOL_GRXRINGS;
616 ret = dev->ethtool_ops->get_rxnfc(dev, &rx_rings, NULL);
617 if (ret)
618 goto out;
278bc429
BH		 619
620 if (user_size == 0) {
621 for (i = 0; i < dev_size; i++)
622 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
623 } else {
624 if (copy_from_user(indir,
625 useraddr +
626 offsetof(struct ethtool_rxfh_indir,
627 ring_index[0]),
628 dev_size * sizeof(indir[0]))) {
629 ret = -EFAULT;
7850f63f
BH		 630 goto out;
631 }
278bc429
BH		 632
633 /* Validate ring indices */
634 for (i = 0; i < dev_size; i++) {
635 if (indir[i] >= rx_rings.data) {
636 ret = -EINVAL;
637 goto out;
638 }
639 }
7850f63f
BH		 640 }
641
a5b6ee29
BH		 642 ret = dev->ethtool_ops->set_rxfh_indir(dev, indir);
643
644out:
645 kfree(indir);
646 return ret;
647}
648
1da177e4
LT		 649static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
650{
651 struct ethtool_regs regs;
76fd8593 652 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 653 void *regbuf;
654 int reglen, ret;
655
656 if (!ops->get_regs || !ops->get_regs_len)
657 return -EOPNOTSUPP;
658
659 if (copy_from_user(&regs, useraddr, sizeof(regs)))
660 return -EFAULT;
661
662 reglen = ops->get_regs_len(dev);
663 if (regs.len > reglen)
664 regs.len = reglen;
665
b7c7d01a 666 regbuf = vzalloc(reglen);
67ae7cf1 667 if (reglen && !regbuf)
1da177e4
LT		 668 return -ENOMEM;
669
670 ops->get_regs(dev, &regs, regbuf);
671
672 ret = -EFAULT;
673 if (copy_to_user(useraddr, &regs, sizeof(regs)))
674 goto out;
675 useraddr += offsetof(struct ethtool_regs, data);
67ae7cf1 676 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1da177e4
LT		 677 goto out;
678 ret = 0;
679
680 out:
a77f5db3 681 vfree(regbuf);
1da177e4
LT		 682 return ret;
683}
684
d73d3a8c
BH		 685static int ethtool_reset(struct net_device *dev, char __user *useraddr)
686{
687 struct ethtool_value reset;
688 int ret;
689
690 if (!dev->ethtool_ops->reset)
691 return -EOPNOTSUPP;
692
693 if (copy_from_user(&reset, useraddr, sizeof(reset)))
694 return -EFAULT;
695
696 ret = dev->ethtool_ops->reset(dev, &reset.data);
697 if (ret)
698 return ret;
699
700 if (copy_to_user(useraddr, &reset, sizeof(reset)))
701 return -EFAULT;
702 return 0;
703}
704
1da177e4
LT		 705static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
706{
8e557421 707 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1da177e4
LT		 708
709 if (!dev->ethtool_ops->get_wol)
710 return -EOPNOTSUPP;
711
712 dev->ethtool_ops->get_wol(dev, &wol);
713
714 if (copy_to_user(useraddr, &wol, sizeof(wol)))
715 return -EFAULT;
716 return 0;
717}
718
719static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
720{
721 struct ethtool_wolinfo wol;
722
723 if (!dev->ethtool_ops->set_wol)
724 return -EOPNOTSUPP;
725
726 if (copy_from_user(&wol, useraddr, sizeof(wol)))
727 return -EFAULT;
728
729 return dev->ethtool_ops->set_wol(dev, &wol);
730}
731
1da177e4
LT		 732static int ethtool_nway_reset(struct net_device *dev)
733{
734 if (!dev->ethtool_ops->nway_reset)
735 return -EOPNOTSUPP;
736
737 return dev->ethtool_ops->nway_reset(dev);
738}
739
e596e6e4
BH		 740static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
741{
742 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
743
744 if (!dev->ethtool_ops->get_link)
745 return -EOPNOTSUPP;
746
747 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
748
749 if (copy_to_user(useraddr, &edata, sizeof(edata)))
750 return -EFAULT;
751 return 0;
752}
753
1da177e4
LT		 754static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
755{
756 struct ethtool_eeprom eeprom;
76fd8593 757 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 758 void __user *userbuf = useraddr + sizeof(eeprom);
759 u32 bytes_remaining;
1da177e4 760 u8 *data;
b131dd5d 761 int ret = 0;
1da177e4
LT		 762
763 if (!ops->get_eeprom || !ops->get_eeprom_len)
764 return -EOPNOTSUPP;
765
766 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
767 return -EFAULT;
768
769 /* Check for wrap and zero */
770 if (eeprom.offset + eeprom.len <= eeprom.offset)
771 return -EINVAL;
772
773 /* Check for exceeding total eeprom len */
774 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
775 return -EINVAL;
776
b131dd5d 777 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 778 if (!data)
779 return -ENOMEM;
780
b131dd5d
MSB		 781 bytes_remaining = eeprom.len;
782 while (bytes_remaining > 0) {
783 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
784
785 ret = ops->get_eeprom(dev, &eeprom, data);
786 if (ret)
787 break;
788 if (copy_to_user(userbuf, data, eeprom.len)) {
789 ret = -EFAULT;
790 break;
791 }
792 userbuf += eeprom.len;
793 eeprom.offset += eeprom.len;
794 bytes_remaining -= eeprom.len;
795 }
1da177e4 796
c5835df9
MSB		 797 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
798 eeprom.offset -= eeprom.len;
799 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
800 ret = -EFAULT;
801
1da177e4
LT		 802 kfree(data);
803 return ret;
804}
805
806static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
807{
808 struct ethtool_eeprom eeprom;
76fd8593 809 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 810 void __user *userbuf = useraddr + sizeof(eeprom);
811 u32 bytes_remaining;
1da177e4 812 u8 *data;
b131dd5d 813 int ret = 0;
1da177e4
LT		 814
815 if (!ops->set_eeprom || !ops->get_eeprom_len)
816 return -EOPNOTSUPP;
817
818 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
819 return -EFAULT;
820
821 /* Check for wrap and zero */
822 if (eeprom.offset + eeprom.len <= eeprom.offset)
823 return -EINVAL;
824
825 /* Check for exceeding total eeprom len */
826 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
827 return -EINVAL;
828
b131dd5d 829 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 830 if (!data)
831 return -ENOMEM;
832
b131dd5d
MSB		 833 bytes_remaining = eeprom.len;
834 while (bytes_remaining > 0) {
835 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
836
837 if (copy_from_user(data, userbuf, eeprom.len)) {
838 ret = -EFAULT;
839 break;
840 }
841 ret = ops->set_eeprom(dev, &eeprom, data);
842 if (ret)
843 break;
844 userbuf += eeprom.len;
845 eeprom.offset += eeprom.len;
846 bytes_remaining -= eeprom.len;
847 }
1da177e4 848
1da177e4
LT		 849 kfree(data);
850 return ret;
851}
852
97f8aefb 853static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
854 void __user *useraddr)
1da177e4 855{
8e557421 856 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1da177e4
LT		 857
858 if (!dev->ethtool_ops->get_coalesce)
859 return -EOPNOTSUPP;
860
861 dev->ethtool_ops->get_coalesce(dev, &coalesce);
862
863 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
864 return -EFAULT;
865 return 0;
866}
867
97f8aefb 868static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
869 void __user *useraddr)
1da177e4
LT		 870{
871 struct ethtool_coalesce coalesce;
872
fa04ae5c 873 if (!dev->ethtool_ops->set_coalesce)
1da177e4
LT		 874 return -EOPNOTSUPP;
875
876 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
877 return -EFAULT;
878
879 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
880}
881
882static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
883{
8e557421 884 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1da177e4
LT		 885
886 if (!dev->ethtool_ops->get_ringparam)
887 return -EOPNOTSUPP;
888
889 dev->ethtool_ops->get_ringparam(dev, &ringparam);
890
891 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
892 return -EFAULT;
893 return 0;
894}
895
896static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
897{
898 struct ethtool_ringparam ringparam;
899
900 if (!dev->ethtool_ops->set_ringparam)
901 return -EOPNOTSUPP;
902
903 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
904 return -EFAULT;
905
906 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
907}
908
8b5933c3 909static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
910 void __user *useraddr)
911{
912 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
913
914 if (!dev->ethtool_ops->get_channels)
915 return -EOPNOTSUPP;
916
917 dev->ethtool_ops->get_channels(dev, &channels);
918
919 if (copy_to_user(useraddr, &channels, sizeof(channels)))
920 return -EFAULT;
921 return 0;
922}
923
924static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
925 void __user *useraddr)
926{
927 struct ethtool_channels channels;
928
929 if (!dev->ethtool_ops->set_channels)
930 return -EOPNOTSUPP;
931
932 if (copy_from_user(&channels, useraddr, sizeof(channels)))
933 return -EFAULT;
934
935 return dev->ethtool_ops->set_channels(dev, &channels);
936}
937
1da177e4
LT		 938static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
939{
940 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
941
942 if (!dev->ethtool_ops->get_pauseparam)
943 return -EOPNOTSUPP;
944
945 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
946
947 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
948 return -EFAULT;
949 return 0;
950}
951
952static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
953{
954 struct ethtool_pauseparam pauseparam;
955
e1b90c41 956 if (!dev->ethtool_ops->set_pauseparam)
1da177e4
LT		 957 return -EOPNOTSUPP;
958
959 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
960 return -EFAULT;
961
962 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
963}
964
1da177e4
LT		 965static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
966{
967 struct ethtool_test test;
76fd8593 968 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 969 u64 *data;
ff03d49f 970 int ret, test_len;
1da177e4 971
a9828ec6 972 if (!ops->self_test || !ops->get_sset_count)
1da177e4
LT		 973 return -EOPNOTSUPP;
974
a9828ec6 975 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
ff03d49f
JG		 976 if (test_len < 0)
977 return test_len;
978 WARN_ON(test_len == 0);
979
1da177e4
LT		 980 if (copy_from_user(&test, useraddr, sizeof(test)))
981 return -EFAULT;
982
ff03d49f
JG		 983 test.len = test_len;
984 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1da177e4
LT		 985 if (!data)
986 return -ENOMEM;
987
988 ops->self_test(dev, &test, data);
989
990 ret = -EFAULT;
991 if (copy_to_user(useraddr, &test, sizeof(test)))
992 goto out;
993 useraddr += sizeof(test);
994 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
995 goto out;
996 ret = 0;
997
998 out:
999 kfree(data);
1000 return ret;
1001}
1002
1003static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1004{
1005 struct ethtool_gstrings gstrings;
1da177e4
LT		 1006 u8 *data;
1007 int ret;
1008
1da177e4
LT		 1009 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1010 return -EFAULT;
1011
340ae165 1012 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
a9828ec6
BH		 1013 if (ret < 0)
1014 return ret;
1015
1016 gstrings.len = ret;
1da177e4
LT		 1017
1018 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1019 if (!data)
1020 return -ENOMEM;
1021
340ae165 1022 __ethtool_get_strings(dev, gstrings.string_set, data);
1da177e4
LT		 1023
1024 ret = -EFAULT;
1025 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1026 goto out;
1027 useraddr += sizeof(gstrings);
1028 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1029 goto out;
1030 ret = 0;
1031
340ae165 1032out:
1da177e4
LT		 1033 kfree(data);
1034 return ret;
1035}
1036
1037static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1038{
1039 struct ethtool_value id;
68f512f2
BH		 1040 static bool busy;
1041 int rc;
1da177e4 1042
1ab7b6ac 1043 if (!dev->ethtool_ops->set_phys_id)
1da177e4
LT		 1044 return -EOPNOTSUPP;
1045
68f512f2
BH		 1046 if (busy)
1047 return -EBUSY;
1048
1da177e4
LT		 1049 if (copy_from_user(&id, useraddr, sizeof(id)))
1050 return -EFAULT;
1051
68f512f2 1052 rc = dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
fce55922 1053 if (rc < 0)
68f512f2
BH		 1054 return rc;
1055
1056 /* Drop the RTNL lock while waiting, but prevent reentry or
1057 * removal of the device.
1058 */
1059 busy = true;
1060 dev_hold(dev);
1061 rtnl_unlock();
1062
1063 if (rc == 0) {
1064 /* Driver will handle this itself */
1065 schedule_timeout_interruptible(
143780c6 1066 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
68f512f2 1067 } else {
fce55922
AB		 1068 /* Driver expects to be called at twice the frequency in rc */
1069 int n = rc * 2, i, interval = HZ / n;
1070
1071 /* Count down seconds */
68f512f2 1072 do {
fce55922
AB		 1073 /* Count down iterations per second */
1074 i = n;
1075 do {
1076 rtnl_lock();
1077 rc = dev->ethtool_ops->set_phys_id(dev,
1078 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1079 rtnl_unlock();
1080 if (rc)
1081 break;
1082 schedule_timeout_interruptible(interval);
1083 } while (!signal_pending(current) && --i != 0);
68f512f2
BH		 1084 } while (!signal_pending(current) &&
1085 (id.data == 0 || --id.data != 0));
1086 }
1087
1088 rtnl_lock();
1089 dev_put(dev);
1090 busy = false;
1091
1092 (void)dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1093 return rc;
1da177e4
LT		 1094}
1095
1096static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1097{
1098 struct ethtool_stats stats;
76fd8593 1099 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1100 u64 *data;
ff03d49f 1101 int ret, n_stats;
1da177e4 1102
a9828ec6 1103 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1da177e4
LT		 1104 return -EOPNOTSUPP;
1105
a9828ec6 1106 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
ff03d49f
JG		 1107 if (n_stats < 0)
1108 return n_stats;
1109 WARN_ON(n_stats == 0);
1110
1da177e4
LT		 1111 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1112 return -EFAULT;
1113
ff03d49f
JG		 1114 stats.n_stats = n_stats;
1115 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1da177e4
LT		 1116 if (!data)
1117 return -ENOMEM;
1118
1119 ops->get_ethtool_stats(dev, &stats, data);
1120
1121 ret = -EFAULT;
1122 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1123 goto out;
1124 useraddr += sizeof(stats);
1125 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1126 goto out;
1127 ret = 0;
1128
1129 out:
1130 kfree(data);
1131 return ret;
1132}
1133
0bf0519d 1134static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
a6f9a705
JW		 1135{
1136 struct ethtool_perm_addr epaddr;
a6f9a705 1137
313674af 1138 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
a6f9a705
JW		 1139 return -EFAULT;
1140
313674af
MW		 1141 if (epaddr.size < dev->addr_len)
1142 return -ETOOSMALL;
1143 epaddr.size = dev->addr_len;
a6f9a705 1144
a6f9a705 1145 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
313674af 1146 return -EFAULT;
a6f9a705 1147 useraddr += sizeof(epaddr);
313674af
MW		 1148 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1149 return -EFAULT;
1150 return 0;
a6f9a705
JW		 1151}
1152
13c99b24
JG		 1153static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1154 u32 cmd, u32 (*actor)(struct net_device *))
3ae7c0b2 1155{
8e557421 1156 struct ethtool_value edata = { .cmd = cmd };
3ae7c0b2 1157
13c99b24 1158 if (!actor)
3ae7c0b2
JG		 1159 return -EOPNOTSUPP;
1160
13c99b24 1161 edata.data = actor(dev);
3ae7c0b2
JG		 1162
1163 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1164 return -EFAULT;
1165 return 0;
1166}
1167
13c99b24
JG		 1168static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1169 void (*actor)(struct net_device *, u32))
3ae7c0b2
JG		 1170{
1171 struct ethtool_value edata;
1172
13c99b24 1173 if (!actor)
3ae7c0b2
JG		 1174 return -EOPNOTSUPP;
1175
1176 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1177 return -EFAULT;
1178
13c99b24 1179 actor(dev, edata.data);
339bf024
JG		 1180 return 0;
1181}
1182
13c99b24
JG		 1183static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1184 int (*actor)(struct net_device *, u32))
339bf024
JG		 1185{
1186 struct ethtool_value edata;
1187
13c99b24 1188 if (!actor)
339bf024
JG		 1189 return -EOPNOTSUPP;
1190
1191 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1192 return -EFAULT;
1193
13c99b24 1194 return actor(dev, edata.data);
339bf024
JG		 1195}
1196
97f8aefb 1197static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1198 char __user *useraddr)
05c6a8d7
AK		 1199{
1200 struct ethtool_flash efl;
1201
1202 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1203 return -EFAULT;
1204
1205 if (!dev->ethtool_ops->flash_device)
1206 return -EOPNOTSUPP;
1207
786f5281
BH		 1208 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
1209
05c6a8d7
AK		 1210 return dev->ethtool_ops->flash_device(dev, &efl);
1211}
1212
29dd54b7
AC		 1213static int ethtool_set_dump(struct net_device *dev,
1214 void __user *useraddr)
1215{
1216 struct ethtool_dump dump;
1217
1218 if (!dev->ethtool_ops->set_dump)
1219 return -EOPNOTSUPP;
1220
1221 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1222 return -EFAULT;
1223
1224 return dev->ethtool_ops->set_dump(dev, &dump);
1225}
1226
1227static int ethtool_get_dump_flag(struct net_device *dev,
1228 void __user *useraddr)
1229{
1230 int ret;
1231 struct ethtool_dump dump;
1232 const struct ethtool_ops *ops = dev->ethtool_ops;
1233
1234 if (!dev->ethtool_ops->get_dump_flag)
1235 return -EOPNOTSUPP;
1236
1237 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1238 return -EFAULT;
1239
1240 ret = ops->get_dump_flag(dev, &dump);
1241 if (ret)
1242 return ret;
1243
1244 if (copy_to_user(useraddr, &dump, sizeof(dump)))
1245 return -EFAULT;
1246 return 0;
1247}
1248
1249static int ethtool_get_dump_data(struct net_device *dev,
1250 void __user *useraddr)
1251{
1252 int ret;
1253 __u32 len;
1254 struct ethtool_dump dump, tmp;
1255 const struct ethtool_ops *ops = dev->ethtool_ops;
1256 void *data = NULL;
1257
1258 if (!dev->ethtool_ops->get_dump_data ||
1259 !dev->ethtool_ops->get_dump_flag)
1260 return -EOPNOTSUPP;
1261
1262 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1263 return -EFAULT;
1264
1265 memset(&tmp, 0, sizeof(tmp));
1266 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
1267 ret = ops->get_dump_flag(dev, &tmp);
1268 if (ret)
1269 return ret;
1270
1271 len = (tmp.len > dump.len) ? dump.len : tmp.len;
1272 if (!len)
1273 return -EFAULT;
1274
1275 data = vzalloc(tmp.len);
1276 if (!data)
1277 return -ENOMEM;
1278 ret = ops->get_dump_data(dev, &dump, data);
1279 if (ret)
1280 goto out;
1281
1282 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
1283 ret = -EFAULT;
1284 goto out;
1285 }
1286 useraddr += offsetof(struct ethtool_dump, data);
1287 if (copy_to_user(useraddr, data, len))
1288 ret = -EFAULT;
1289out:
1290 vfree(data);
1291 return ret;
1292}
1293
c8f3a8c3
RC		 1294static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
1295{
1296 int err = 0;
1297 struct ethtool_ts_info info;
1298 const struct ethtool_ops *ops = dev->ethtool_ops;
1299 struct phy_device *phydev = dev->phydev;
1300
1301 memset(&info, 0, sizeof(info));
1302 info.cmd = ETHTOOL_GET_TS_INFO;
1303
1304 if (phydev && phydev->drv && phydev->drv->ts_info) {
1305
1306 err = phydev->drv->ts_info(phydev, &info);
1307
1308 } else if (dev->ethtool_ops && dev->ethtool_ops->get_ts_info) {
1309
1310 err = ops->get_ts_info(dev, &info);
1311
1312 } else {
1313 info.so_timestamping =
1314 SOF_TIMESTAMPING_RX_SOFTWARE |
1315 SOF_TIMESTAMPING_SOFTWARE;
1316 info.phc_index = -1;
1317 }
1318
1319 if (err)
1320 return err;
1321
1322 if (copy_to_user(useraddr, &info, sizeof(info)))
1323 err = -EFAULT;
1324
1325 return err;
1326}
1327
1da177e4
LT		 1328/* The main entry point in this file. Called from net/core/dev.c */
1329
881d966b 1330int dev_ethtool(struct net *net, struct ifreq *ifr)
1da177e4 1331{
881d966b 1332 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1da177e4
LT		 1333 void __user *useraddr = ifr->ifr_data;
1334 u32 ethcmd;
1335 int rc;
04ed3e74 1336 u32 old_features;
1da177e4 1337
1da177e4
LT		 1338 if (!dev || !netif_device_present(dev))
1339 return -ENODEV;
1340
97f8aefb 1341 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1da177e4
LT		 1342 return -EFAULT;
1343
01414802 1344 if (!dev->ethtool_ops) {
c8f3a8c3
RC		 1345 /* A few commands do not require any driver support,
1346 * are unprivileged, and do not change anything, so we
1347 * can take a shortcut to them. */
01414802
BH		 1348 if (ethcmd == ETHTOOL_GDRVINFO)
1349 return ethtool_get_drvinfo(dev, useraddr);
c8f3a8c3
RC		 1350 else if (ethcmd == ETHTOOL_GET_TS_INFO)
1351 return ethtool_get_ts_info(dev, useraddr);
01414802
BH		 1352 else
1353 return -EOPNOTSUPP;
1354 }
1355
75f3123c 1356 /* Allow some commands to be done by anyone */
97f8aefb 1357 switch (ethcmd) {
0fdc100b 1358 case ETHTOOL_GSET:
75f3123c 1359 case ETHTOOL_GDRVINFO:
75f3123c 1360 case ETHTOOL_GMSGLVL:
75f3123c
SH		 1361 case ETHTOOL_GCOALESCE:
1362 case ETHTOOL_GRINGPARAM:
1363 case ETHTOOL_GPAUSEPARAM:
1364 case ETHTOOL_GRXCSUM:
1365 case ETHTOOL_GTXCSUM:
1366 case ETHTOOL_GSG:
f80400a2 1367 case ETHTOOL_GSSET_INFO:
75f3123c 1368 case ETHTOOL_GSTRINGS:
75f3123c
SH		 1369 case ETHTOOL_GTSO:
1370 case ETHTOOL_GPERMADDR:
1371 case ETHTOOL_GUFO:
1372 case ETHTOOL_GGSO:
1cab819b 1373 case ETHTOOL_GGRO:
339bf024
JG		 1374 case ETHTOOL_GFLAGS:
1375 case ETHTOOL_GPFLAGS:
0853ad66 1376 case ETHTOOL_GRXFH:
59089d8d
SB		 1377 case ETHTOOL_GRXRINGS:
1378 case ETHTOOL_GRXCLSRLCNT:
1379 case ETHTOOL_GRXCLSRULE:
1380 case ETHTOOL_GRXCLSRLALL:
5455c699 1381 case ETHTOOL_GFEATURES:
c8f3a8c3 1382 case ETHTOOL_GET_TS_INFO:
75f3123c
SH		 1383 break;
1384 default:
1385 if (!capable(CAP_NET_ADMIN))
1386 return -EPERM;
1387 }
1388
97f8aefb 1389 if (dev->ethtool_ops->begin) {
1390 rc = dev->ethtool_ops->begin(dev);
1391 if (rc < 0)
1da177e4 1392 return rc;
97f8aefb 1393 }
d8a33ac4
SH		 1394 old_features = dev->features;
1395
1da177e4
LT		 1396 switch (ethcmd) {
1397 case ETHTOOL_GSET:
1398 rc = ethtool_get_settings(dev, useraddr);
1399 break;
1400 case ETHTOOL_SSET:
1401 rc = ethtool_set_settings(dev, useraddr);
1402 break;
1403 case ETHTOOL_GDRVINFO:
1404 rc = ethtool_get_drvinfo(dev, useraddr);
1da177e4
LT		 1405 break;
1406 case ETHTOOL_GREGS:
1407 rc = ethtool_get_regs(dev, useraddr);
1408 break;
1409 case ETHTOOL_GWOL:
1410 rc = ethtool_get_wol(dev, useraddr);
1411 break;
1412 case ETHTOOL_SWOL:
1413 rc = ethtool_set_wol(dev, useraddr);
1414 break;
1415 case ETHTOOL_GMSGLVL:
13c99b24
JG		 1416 rc = ethtool_get_value(dev, useraddr, ethcmd,
1417 dev->ethtool_ops->get_msglevel);
1da177e4
LT		 1418 break;
1419 case ETHTOOL_SMSGLVL:
13c99b24
JG		 1420 rc = ethtool_set_value_void(dev, useraddr,
1421 dev->ethtool_ops->set_msglevel);
1da177e4
LT		 1422 break;
1423 case ETHTOOL_NWAY_RST:
1424 rc = ethtool_nway_reset(dev);
1425 break;
1426 case ETHTOOL_GLINK:
e596e6e4 1427 rc = ethtool_get_link(dev, useraddr);
1da177e4
LT		 1428 break;
1429 case ETHTOOL_GEEPROM:
1430 rc = ethtool_get_eeprom(dev, useraddr);
1431 break;
1432 case ETHTOOL_SEEPROM:
1433 rc = ethtool_set_eeprom(dev, useraddr);
1434 break;
1435 case ETHTOOL_GCOALESCE:
1436 rc = ethtool_get_coalesce(dev, useraddr);
1437 break;
1438 case ETHTOOL_SCOALESCE:
1439 rc = ethtool_set_coalesce(dev, useraddr);
1440 break;
1441 case ETHTOOL_GRINGPARAM:
1442 rc = ethtool_get_ringparam(dev, useraddr);
1443 break;
1444 case ETHTOOL_SRINGPARAM:
1445 rc = ethtool_set_ringparam(dev, useraddr);
1446 break;
1447 case ETHTOOL_GPAUSEPARAM:
1448 rc = ethtool_get_pauseparam(dev, useraddr);
1449 break;
1450 case ETHTOOL_SPAUSEPARAM:
1451 rc = ethtool_set_pauseparam(dev, useraddr);
1452 break;
1da177e4
LT		 1453 case ETHTOOL_TEST:
1454 rc = ethtool_self_test(dev, useraddr);
1455 break;
1456 case ETHTOOL_GSTRINGS:
1457 rc = ethtool_get_strings(dev, useraddr);
1458 break;
1459 case ETHTOOL_PHYS_ID:
1460 rc = ethtool_phys_id(dev, useraddr);
1461 break;
1462 case ETHTOOL_GSTATS:
1463 rc = ethtool_get_stats(dev, useraddr);
1464 break;
a6f9a705
JW		 1465 case ETHTOOL_GPERMADDR:
1466 rc = ethtool_get_perm_addr(dev, useraddr);
1467 break;
3ae7c0b2 1468 case ETHTOOL_GFLAGS:
13c99b24 1469 rc = ethtool_get_value(dev, useraddr, ethcmd,
bc5787c6 1470 __ethtool_get_flags);
3ae7c0b2
JG		 1471 break;
1472 case ETHTOOL_SFLAGS:
da8ac86c 1473 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3ae7c0b2 1474 break;
339bf024 1475 case ETHTOOL_GPFLAGS:
13c99b24
JG		 1476 rc = ethtool_get_value(dev, useraddr, ethcmd,
1477 dev->ethtool_ops->get_priv_flags);
339bf024
JG		 1478 break;
1479 case ETHTOOL_SPFLAGS:
13c99b24
JG		 1480 rc = ethtool_set_value(dev, useraddr,
1481 dev->ethtool_ops->set_priv_flags);
339bf024 1482 break;
0853ad66 1483 case ETHTOOL_GRXFH:
59089d8d
SB		 1484 case ETHTOOL_GRXRINGS:
1485 case ETHTOOL_GRXCLSRLCNT:
1486 case ETHTOOL_GRXCLSRULE:
1487 case ETHTOOL_GRXCLSRLALL:
bf988435 1488 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
0853ad66
SB		 1489 break;
1490 case ETHTOOL_SRXFH:
59089d8d
SB		 1491 case ETHTOOL_SRXCLSRLDEL:
1492 case ETHTOOL_SRXCLSRLINS:
bf988435 1493 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
0853ad66 1494 break;
05c6a8d7
AK		 1495 case ETHTOOL_FLASHDEV:
1496 rc = ethtool_flash_device(dev, useraddr);
1497 break;
d73d3a8c
BH		 1498 case ETHTOOL_RESET:
1499 rc = ethtool_reset(dev, useraddr);
1500 break;
723b2f57
JG		 1501 case ETHTOOL_GSSET_INFO:
1502 rc = ethtool_get_sset_info(dev, useraddr);
1503 break;
a5b6ee29
BH		 1504 case ETHTOOL_GRXFHINDIR:
1505 rc = ethtool_get_rxfh_indir(dev, useraddr);
1506 break;
1507 case ETHTOOL_SRXFHINDIR:
1508 rc = ethtool_set_rxfh_indir(dev, useraddr);
1509 break;
5455c699
MM		 1510 case ETHTOOL_GFEATURES:
1511 rc = ethtool_get_features(dev, useraddr);
1512 break;
1513 case ETHTOOL_SFEATURES:
1514 rc = ethtool_set_features(dev, useraddr);
1515 break;
0a417704 1516 case ETHTOOL_GTXCSUM:
e83d360d 1517 case ETHTOOL_GRXCSUM:
0a417704
MM		 1518 case ETHTOOL_GSG:
1519 case ETHTOOL_GTSO:
1520 case ETHTOOL_GUFO:
1521 case ETHTOOL_GGSO:
1522 case ETHTOOL_GGRO:
1523 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
1524 break;
1525 case ETHTOOL_STXCSUM:
e83d360d 1526 case ETHTOOL_SRXCSUM:
0a417704
MM		 1527 case ETHTOOL_SSG:
1528 case ETHTOOL_STSO:
1529 case ETHTOOL_SUFO:
1530 case ETHTOOL_SGSO:
1531 case ETHTOOL_SGRO:
1532 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
1533 break;
8b5933c3 1534 case ETHTOOL_GCHANNELS:
1535 rc = ethtool_get_channels(dev, useraddr);
1536 break;
1537 case ETHTOOL_SCHANNELS:
1538 rc = ethtool_set_channels(dev, useraddr);
1539 break;
29dd54b7
AC		 1540 case ETHTOOL_SET_DUMP:
1541 rc = ethtool_set_dump(dev, useraddr);
1542 break;
1543 case ETHTOOL_GET_DUMP_FLAG:
1544 rc = ethtool_get_dump_flag(dev, useraddr);
1545 break;
1546 case ETHTOOL_GET_DUMP_DATA:
1547 rc = ethtool_get_dump_data(dev, useraddr);
1548 break;
c8f3a8c3
RC		 1549 case ETHTOOL_GET_TS_INFO:
1550 rc = ethtool_get_ts_info(dev, useraddr);
1551 break;
1da177e4 1552 default:
61a44b9c 1553 rc = -EOPNOTSUPP;
1da177e4 1554 }
4ec93edb 1555
e71a4783 1556 if (dev->ethtool_ops->complete)
1da177e4 1557 dev->ethtool_ops->complete(dev);
d8a33ac4
SH		 1558
1559 if (old_features != dev->features)
1560 netdev_features_change(dev);
1561
1da177e4 1562 return rc;
1da177e4 1563}
Linux kernel - Deliverables
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