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Merge tag 'tty-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
[linux-2.6-block.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",
cb32f511 84 [NETIF_F_GSO_IPIP_BIT] = "tx-ipip-segmentation",
61c1db7f 85 [NETIF_F_GSO_SIT_BIT] = "tx-sit-segmentation",
73136267 86 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
0d89d203 87 [NETIF_F_GSO_MPLS_BIT] = "tx-mpls-segmentation",
9d921549
MM		 88
89 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
90 [NETIF_F_SCTP_CSUM_BIT] = "tx-checksum-sctp",
91 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
92 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
93 [NETIF_F_RXHASH_BIT] = "rx-hashing",
94 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
95 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
96 [NETIF_F_LOOPBACK_BIT] = "loopback",
36eabda3 97 [NETIF_F_RXFCS_BIT] = "rx-fcs",
5e0c03c8 98 [NETIF_F_RXALL_BIT] = "rx-all",
a6cc0cfa 99 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
9d921549
MM		 100};
101
5455c699
MM		 102static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
103{
104 struct ethtool_gfeatures cmd = {
105 .cmd = ETHTOOL_GFEATURES,
106 .size = ETHTOOL_DEV_FEATURE_WORDS,
107 };
475414f6 108 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
5455c699
MM		 109 u32 __user *sizeaddr;
110 u32 copy_size;
475414f6
MM		 111 int i;
112
113 /* in case feature bits run out again */
09da71b1 114 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
475414f6
MM		 115
116 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 117 features[i].available = (u32)(dev->hw_features >> (32 * i));
118 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
119 features[i].active = (u32)(dev->features >> (32 * i));
120 features[i].never_changed =
121 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
475414f6 122 }
5455c699
MM		 123
124 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
125 if (get_user(copy_size, sizeaddr))
126 return -EFAULT;
127
128 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
129 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
130
131 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
132 return -EFAULT;
133 useraddr += sizeof(cmd);
134 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
135 return -EFAULT;
136
137 return 0;
138}
139
140static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
141{
142 struct ethtool_sfeatures cmd;
143 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
475414f6
MM		 144 netdev_features_t wanted = 0, valid = 0;
145 int i, ret = 0;
5455c699
MM		 146
147 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
148 return -EFAULT;
149 useraddr += sizeof(cmd);
150
151 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
152 return -EINVAL;
153
154 if (copy_from_user(features, useraddr, sizeof(features)))
155 return -EFAULT;
156
475414f6 157 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 158 valid |= (netdev_features_t)features[i].valid << (32 * i);
159 wanted |= (netdev_features_t)features[i].requested << (32 * i);
475414f6
MM		 160 }
161
162 if (valid & ~NETIF_F_ETHTOOL_BITS)
5455c699
MM		 163 return -EINVAL;
164
475414f6
MM		 165 if (valid & ~dev->hw_features) {
166 valid &= dev->hw_features;
5455c699
MM		 167 ret |= ETHTOOL_F_UNSUPPORTED;
168 }
169
475414f6
MM		 170 dev->wanted_features &= ~valid;
171 dev->wanted_features |= wanted & valid;
6cb6a27c 172 __netdev_update_features(dev);
5455c699 173
475414f6 174 if ((dev->wanted_features ^ dev->features) & valid)
5455c699
MM		 175 ret |= ETHTOOL_F_WISH;
176
177 return ret;
178}
179
340ae165
MM		 180static int __ethtool_get_sset_count(struct net_device *dev, int sset)
181{
182 const struct ethtool_ops *ops = dev->ethtool_ops;
183
5455c699
MM		 184 if (sset == ETH_SS_FEATURES)
185 return ARRAY_SIZE(netdev_features_strings);
186
c03a14e8 187 if (ops->get_sset_count && ops->get_strings)
340ae165
MM		 188 return ops->get_sset_count(dev, sset);
189 else
190 return -EOPNOTSUPP;
191}
192
193static void __ethtool_get_strings(struct net_device *dev,
194 u32 stringset, u8 *data)
195{
196 const struct ethtool_ops *ops = dev->ethtool_ops;
197
5455c699
MM		 198 if (stringset == ETH_SS_FEATURES)
199 memcpy(data, netdev_features_strings,
200 sizeof(netdev_features_strings));
201 else
202 /* ops->get_strings is valid because checked earlier */
203 ops->get_strings(dev, stringset, data);
340ae165
MM		 204}
205
c8f44aff 206static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
0a417704
MM		 207{
208 /* feature masks of legacy discrete ethtool ops */
209
210 switch (eth_cmd) {
211 case ETHTOOL_GTXCSUM:
212 case ETHTOOL_STXCSUM:
213 return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM;
e83d360d
MM		 214 case ETHTOOL_GRXCSUM:
215 case ETHTOOL_SRXCSUM:
216 return NETIF_F_RXCSUM;
0a417704
MM		 217 case ETHTOOL_GSG:
218 case ETHTOOL_SSG:
219 return NETIF_F_SG;
220 case ETHTOOL_GTSO:
221 case ETHTOOL_STSO:
222 return NETIF_F_ALL_TSO;
223 case ETHTOOL_GUFO:
224 case ETHTOOL_SUFO:
225 return NETIF_F_UFO;
226 case ETHTOOL_GGSO:
227 case ETHTOOL_SGSO:
228 return NETIF_F_GSO;
229 case ETHTOOL_GGRO:
230 case ETHTOOL_SGRO:
231 return NETIF_F_GRO;
232 default:
233 BUG();
234 }
235}
236
0a417704
MM		 237static int ethtool_get_one_feature(struct net_device *dev,
238 char __user *useraddr, u32 ethcmd)
239{
c8f44aff 240 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
0a417704
MM		 241 struct ethtool_value edata = {
242 .cmd = ethcmd,
86794881 243 .data = !!(dev->features & mask),
0a417704 244 };
0a417704 245
0a417704
MM		 246 if (copy_to_user(useraddr, &edata, sizeof(edata)))
247 return -EFAULT;
248 return 0;
249}
250
0a417704
MM		 251static int ethtool_set_one_feature(struct net_device *dev,
252 void __user *useraddr, u32 ethcmd)
253{
254 struct ethtool_value edata;
c8f44aff 255 netdev_features_t mask;
0a417704
MM		 256
257 if (copy_from_user(&edata, useraddr, sizeof(edata)))
258 return -EFAULT;
259
86794881
MM		 260 mask = ethtool_get_feature_mask(ethcmd);
261 mask &= dev->hw_features;
bc5787c6
MM		 262 if (!mask)
263 return -EOPNOTSUPP;
86794881 264
bc5787c6
MM		 265 if (edata.data)
266 dev->wanted_features |= mask;
267 else
268 dev->wanted_features &= ~mask;
86794881 269
bc5787c6 270 __netdev_update_features(dev);
86794881 271
bc5787c6
MM		 272 return 0;
273}
274
02b3a552
MM		 275#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
276 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
f646968f
PM		 277#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
278 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
279 NETIF_F_RXHASH)
bc5787c6
MM		 280
281static u32 __ethtool_get_flags(struct net_device *dev)
282{
02b3a552
MM		 283 u32 flags = 0;
284
8a73125c
DF		 285 if (dev->features & NETIF_F_LRO)
286 flags |= ETH_FLAG_LRO;
287 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
288 flags |= ETH_FLAG_RXVLAN;
289 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
290 flags |= ETH_FLAG_TXVLAN;
291 if (dev->features & NETIF_F_NTUPLE)
292 flags |= ETH_FLAG_NTUPLE;
293 if (dev->features & NETIF_F_RXHASH)
294 flags |= ETH_FLAG_RXHASH;
02b3a552
MM		 295
296 return flags;
0a417704
MM		 297}
298
bc5787c6 299static int __ethtool_set_flags(struct net_device *dev, u32 data)
da8ac86c 300{
c8f44aff 301 netdev_features_t features = 0, changed;
da8ac86c 302
02b3a552 303 if (data & ~ETH_ALL_FLAGS)
da8ac86c
MM		 304 return -EINVAL;
305
8a73125c
DF		 306 if (data & ETH_FLAG_LRO)
307 features |= NETIF_F_LRO;
308 if (data & ETH_FLAG_RXVLAN)
309 features |= NETIF_F_HW_VLAN_CTAG_RX;
310 if (data & ETH_FLAG_TXVLAN)
311 features |= NETIF_F_HW_VLAN_CTAG_TX;
312 if (data & ETH_FLAG_NTUPLE)
313 features |= NETIF_F_NTUPLE;
314 if (data & ETH_FLAG_RXHASH)
315 features |= NETIF_F_RXHASH;
02b3a552 316
da8ac86c 317 /* allow changing only bits set in hw_features */
02b3a552 318 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
da8ac86c
MM		 319 if (changed & ~dev->hw_features)
320 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
321
322 dev->wanted_features =
02b3a552 323 (dev->wanted_features & ~changed) | (features & changed);
da8ac86c 324
6cb6a27c 325 __netdev_update_features(dev);
da8ac86c
MM		 326
327 return 0;
328}
329
4bc71cb9 330int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1da177e4 331{
4bc71cb9 332 ASSERT_RTNL();
1da177e4 333
c03a14e8 334 if (!dev->ethtool_ops->get_settings)
1da177e4
LT		 335 return -EOPNOTSUPP;
336
4bc71cb9
JP		 337 memset(cmd, 0, sizeof(struct ethtool_cmd));
338 cmd->cmd = ETHTOOL_GSET;
339 return dev->ethtool_ops->get_settings(dev, cmd);
340}
341EXPORT_SYMBOL(__ethtool_get_settings);
342
343static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
344{
345 int err;
346 struct ethtool_cmd cmd;
347
348 err = __ethtool_get_settings(dev, &cmd);
1da177e4
LT		 349 if (err < 0)
350 return err;
351
352 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
353 return -EFAULT;
354 return 0;
355}
356
357static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
358{
359 struct ethtool_cmd cmd;
360
361 if (!dev->ethtool_ops->set_settings)
362 return -EOPNOTSUPP;
363
364 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
365 return -EFAULT;
366
367 return dev->ethtool_ops->set_settings(dev, &cmd);
368}
369
97f8aefb 370static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
371 void __user *useraddr)
1da177e4
LT		 372{
373 struct ethtool_drvinfo info;
76fd8593 374 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 375
1da177e4
LT		 376 memset(&info, 0, sizeof(info));
377 info.cmd = ETHTOOL_GDRVINFO;
c03a14e8 378 if (ops->get_drvinfo) {
01414802
BH		 379 ops->get_drvinfo(dev, &info);
380 } else if (dev->dev.parent && dev->dev.parent->driver) {
381 strlcpy(info.bus_info, dev_name(dev->dev.parent),
382 sizeof(info.bus_info));
383 strlcpy(info.driver, dev->dev.parent->driver->name,
384 sizeof(info.driver));
385 } else {
386 return -EOPNOTSUPP;
387 }
1da177e4 388
723b2f57
JG		 389 /*
390 * this method of obtaining string set info is deprecated;
d17792eb 391 * Use ETHTOOL_GSSET_INFO instead.
723b2f57 392 */
c03a14e8 393 if (ops->get_sset_count) {
ff03d49f
JG		 394 int rc;
395
396 rc = ops->get_sset_count(dev, ETH_SS_TEST);
397 if (rc >= 0)
398 info.testinfo_len = rc;
399 rc = ops->get_sset_count(dev, ETH_SS_STATS);
400 if (rc >= 0)
401 info.n_stats = rc;
339bf024
JG		 402 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
403 if (rc >= 0)
404 info.n_priv_flags = rc;
ff03d49f 405 }
c03a14e8 406 if (ops->get_regs_len)
1da177e4 407 info.regdump_len = ops->get_regs_len(dev);
c03a14e8 408 if (ops->get_eeprom_len)
1da177e4
LT		 409 info.eedump_len = ops->get_eeprom_len(dev);
410
411 if (copy_to_user(useraddr, &info, sizeof(info)))
412 return -EFAULT;
413 return 0;
414}
415
f5c445ed 416static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
97f8aefb 417 void __user *useraddr)
723b2f57
JG		 418{
419 struct ethtool_sset_info info;
723b2f57
JG		 420 u64 sset_mask;
421 int i, idx = 0, n_bits = 0, ret, rc;
422 u32 *info_buf = NULL;
423
723b2f57
JG		 424 if (copy_from_user(&info, useraddr, sizeof(info)))
425 return -EFAULT;
426
427 /* store copy of mask, because we zero struct later on */
428 sset_mask = info.sset_mask;
429 if (!sset_mask)
430 return 0;
431
432 /* calculate size of return buffer */
d17792eb 433 n_bits = hweight64(sset_mask);
723b2f57
JG		 434
435 memset(&info, 0, sizeof(info));
436 info.cmd = ETHTOOL_GSSET_INFO;
437
438 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
439 if (!info_buf)
440 return -ENOMEM;
441
442 /*
443 * fill return buffer based on input bitmask and successful
444 * get_sset_count return
445 */
446 for (i = 0; i < 64; i++) {
447 if (!(sset_mask & (1ULL << i)))
448 continue;
449
340ae165 450 rc = __ethtool_get_sset_count(dev, i);
723b2f57
JG		 451 if (rc >= 0) {
452 info.sset_mask |= (1ULL << i);
453 info_buf[idx++] = rc;
454 }
455 }
456
457 ret = -EFAULT;
458 if (copy_to_user(useraddr, &info, sizeof(info)))
459 goto out;
460
461 useraddr += offsetof(struct ethtool_sset_info, data);
462 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
463 goto out;
464
465 ret = 0;
466
467out:
468 kfree(info_buf);
469 return ret;
470}
471
97f8aefb 472static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
bf988435 473 u32 cmd, void __user *useraddr)
0853ad66 474{
bf988435
BH		 475 struct ethtool_rxnfc info;
476 size_t info_size = sizeof(info);
55664f32 477 int rc;
0853ad66 478
59089d8d 479 if (!dev->ethtool_ops->set_rxnfc)
0853ad66
SB		 480 return -EOPNOTSUPP;
481
bf988435
BH		 482 /* struct ethtool_rxnfc was originally defined for
483 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
484 * members. User-space might still be using that
485 * definition. */
486 if (cmd == ETHTOOL_SRXFH)
487 info_size = (offsetof(struct ethtool_rxnfc, data) +
488 sizeof(info.data));
489
490 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 491 return -EFAULT;
492
55664f32
BH		 493 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
494 if (rc)
495 return rc;
496
497 if (cmd == ETHTOOL_SRXCLSRLINS &&
498 copy_to_user(useraddr, &info, info_size))
499 return -EFAULT;
500
501 return 0;
0853ad66
SB		 502}
503
97f8aefb 504static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
bf988435 505 u32 cmd, void __user *useraddr)
0853ad66
SB		 506{
507 struct ethtool_rxnfc info;
bf988435 508 size_t info_size = sizeof(info);
59089d8d
SB		 509 const struct ethtool_ops *ops = dev->ethtool_ops;
510 int ret;
511 void *rule_buf = NULL;
0853ad66 512
59089d8d 513 if (!ops->get_rxnfc)
0853ad66
SB		 514 return -EOPNOTSUPP;
515
bf988435
BH		 516 /* struct ethtool_rxnfc was originally defined for
517 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
518 * members. User-space might still be using that
519 * definition. */
520 if (cmd == ETHTOOL_GRXFH)
521 info_size = (offsetof(struct ethtool_rxnfc, data) +
522 sizeof(info.data));
523
524 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 525 return -EFAULT;
526
59089d8d
SB		 527 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
528 if (info.rule_cnt > 0) {
db048b69 529 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
ae6df5f9 530 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
db048b69 531 GFP_USER);
59089d8d
SB		 532 if (!rule_buf)
533 return -ENOMEM;
534 }
535 }
0853ad66 536
59089d8d
SB		 537 ret = ops->get_rxnfc(dev, &info, rule_buf);
538 if (ret < 0)
539 goto err_out;
540
541 ret = -EFAULT;
bf988435 542 if (copy_to_user(useraddr, &info, info_size))
59089d8d
SB		 543 goto err_out;
544
545 if (rule_buf) {
546 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
547 if (copy_to_user(useraddr, rule_buf,
548 info.rule_cnt * sizeof(u32)))
549 goto err_out;
550 }
551 ret = 0;
552
553err_out:
c9caceca 554 kfree(rule_buf);
59089d8d
SB		 555
556 return ret;
0853ad66
SB		 557}
558
a5b6ee29
BH		 559static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
560 void __user *useraddr)
561{
7850f63f
BH		 562 u32 user_size, dev_size;
563 u32 *indir;
a5b6ee29
BH		 564 int ret;
565
7850f63f
BH		 566 if (!dev->ethtool_ops->get_rxfh_indir_size ||
567 !dev->ethtool_ops->get_rxfh_indir)
568 return -EOPNOTSUPP;
569 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
570 if (dev_size == 0)
a5b6ee29
BH		 571 return -EOPNOTSUPP;
572
7850f63f 573 if (copy_from_user(&user_size,
a5b6ee29 574 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 575 sizeof(user_size)))
a5b6ee29
BH		 576 return -EFAULT;
577
7850f63f
BH		 578 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
579 &dev_size, sizeof(dev_size)))
580 return -EFAULT;
581
582 /* If the user buffer size is 0, this is just a query for the
583 * device table size. Otherwise, if it's smaller than the
584 * device table size it's an error.
585 */
586 if (user_size < dev_size)
587 return user_size == 0 ? 0 : -EINVAL;
588
589 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 590 if (!indir)
591 return -ENOMEM;
592
a5b6ee29
BH		 593 ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
594 if (ret)
595 goto out;
596
7850f63f
BH		 597 if (copy_to_user(useraddr +
598 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
599 indir, dev_size * sizeof(indir[0])))
a5b6ee29
BH		 600 ret = -EFAULT;
601
602out:
603 kfree(indir);
604 return ret;
605}
606
607static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
608 void __user *useraddr)
609{
7850f63f
BH		 610 struct ethtool_rxnfc rx_rings;
611 u32 user_size, dev_size, i;
612 u32 *indir;
c03a14e8 613 const struct ethtool_ops *ops = dev->ethtool_ops;
a5b6ee29
BH		 614 int ret;
615
c03a14e8
JP		 616 if (!ops->get_rxfh_indir_size || !ops->set_rxfh_indir ||
617 !ops->get_rxnfc)
7850f63f 618 return -EOPNOTSUPP;
c03a14e8
JP		 619
620 dev_size = ops->get_rxfh_indir_size(dev);
7850f63f 621 if (dev_size == 0)
a5b6ee29
BH		 622 return -EOPNOTSUPP;
623
7850f63f 624 if (copy_from_user(&user_size,
a5b6ee29 625 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 626 sizeof(user_size)))
a5b6ee29
BH		 627 return -EFAULT;
628
278bc429 629 if (user_size != 0 && user_size != dev_size)
7850f63f
BH		 630 return -EINVAL;
631
632 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 633 if (!indir)
634 return -ENOMEM;
635
7850f63f 636 rx_rings.cmd = ETHTOOL_GRXRINGS;
c03a14e8 637 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
7850f63f
BH		 638 if (ret)
639 goto out;
278bc429
BH		 640
641 if (user_size == 0) {
642 for (i = 0; i < dev_size; i++)
643 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
644 } else {
645 if (copy_from_user(indir,
646 useraddr +
647 offsetof(struct ethtool_rxfh_indir,
648 ring_index[0]),
649 dev_size * sizeof(indir[0]))) {
650 ret = -EFAULT;
7850f63f
BH		 651 goto out;
652 }
278bc429
BH		 653
654 /* Validate ring indices */
655 for (i = 0; i < dev_size; i++) {
656 if (indir[i] >= rx_rings.data) {
657 ret = -EINVAL;
658 goto out;
659 }
660 }
7850f63f
BH		 661 }
662
c03a14e8 663 ret = ops->set_rxfh_indir(dev, indir);
a5b6ee29
BH		 664
665out:
666 kfree(indir);
667 return ret;
668}
669
1da177e4
LT		 670static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
671{
672 struct ethtool_regs regs;
76fd8593 673 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 674 void *regbuf;
675 int reglen, ret;
676
677 if (!ops->get_regs || !ops->get_regs_len)
678 return -EOPNOTSUPP;
679
680 if (copy_from_user(&regs, useraddr, sizeof(regs)))
681 return -EFAULT;
682
683 reglen = ops->get_regs_len(dev);
684 if (regs.len > reglen)
685 regs.len = reglen;
686
b7c7d01a 687 regbuf = vzalloc(reglen);
67ae7cf1 688 if (reglen && !regbuf)
1da177e4
LT		 689 return -ENOMEM;
690
691 ops->get_regs(dev, &regs, regbuf);
692
693 ret = -EFAULT;
694 if (copy_to_user(useraddr, &regs, sizeof(regs)))
695 goto out;
696 useraddr += offsetof(struct ethtool_regs, data);
67ae7cf1 697 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1da177e4
LT		 698 goto out;
699 ret = 0;
700
701 out:
a77f5db3 702 vfree(regbuf);
1da177e4
LT		 703 return ret;
704}
705
d73d3a8c
BH		 706static int ethtool_reset(struct net_device *dev, char __user *useraddr)
707{
708 struct ethtool_value reset;
709 int ret;
710
711 if (!dev->ethtool_ops->reset)
712 return -EOPNOTSUPP;
713
714 if (copy_from_user(&reset, useraddr, sizeof(reset)))
715 return -EFAULT;
716
717 ret = dev->ethtool_ops->reset(dev, &reset.data);
718 if (ret)
719 return ret;
720
721 if (copy_to_user(useraddr, &reset, sizeof(reset)))
722 return -EFAULT;
723 return 0;
724}
725
1da177e4
LT		 726static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
727{
8e557421 728 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1da177e4
LT		 729
730 if (!dev->ethtool_ops->get_wol)
731 return -EOPNOTSUPP;
732
733 dev->ethtool_ops->get_wol(dev, &wol);
734
735 if (copy_to_user(useraddr, &wol, sizeof(wol)))
736 return -EFAULT;
737 return 0;
738}
739
740static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
741{
742 struct ethtool_wolinfo wol;
743
744 if (!dev->ethtool_ops->set_wol)
745 return -EOPNOTSUPP;
746
747 if (copy_from_user(&wol, useraddr, sizeof(wol)))
748 return -EFAULT;
749
750 return dev->ethtool_ops->set_wol(dev, &wol);
751}
752
80f12ecc
YM		 753static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
754{
755 struct ethtool_eee edata;
756 int rc;
757
758 if (!dev->ethtool_ops->get_eee)
759 return -EOPNOTSUPP;
760
761 memset(&edata, 0, sizeof(struct ethtool_eee));
762 edata.cmd = ETHTOOL_GEEE;
763 rc = dev->ethtool_ops->get_eee(dev, &edata);
764
765 if (rc)
766 return rc;
767
768 if (copy_to_user(useraddr, &edata, sizeof(edata)))
769 return -EFAULT;
770
771 return 0;
772}
773
774static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
775{
776 struct ethtool_eee edata;
777
778 if (!dev->ethtool_ops->set_eee)
779 return -EOPNOTSUPP;
780
781 if (copy_from_user(&edata, useraddr, sizeof(edata)))
782 return -EFAULT;
783
784 return dev->ethtool_ops->set_eee(dev, &edata);
785}
786
1da177e4
LT		 787static int ethtool_nway_reset(struct net_device *dev)
788{
789 if (!dev->ethtool_ops->nway_reset)
790 return -EOPNOTSUPP;
791
792 return dev->ethtool_ops->nway_reset(dev);
793}
794
e596e6e4
BH		 795static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
796{
797 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
798
799 if (!dev->ethtool_ops->get_link)
800 return -EOPNOTSUPP;
801
802 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
803
804 if (copy_to_user(useraddr, &edata, sizeof(edata)))
805 return -EFAULT;
806 return 0;
807}
808
081d094e
BH		 809static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
810 int (*getter)(struct net_device *,
811 struct ethtool_eeprom *, u8 *),
812 u32 total_len)
1da177e4
LT		 813{
814 struct ethtool_eeprom eeprom;
b131dd5d
MSB		 815 void __user *userbuf = useraddr + sizeof(eeprom);
816 u32 bytes_remaining;
1da177e4 817 u8 *data;
b131dd5d 818 int ret = 0;
1da177e4 819
1da177e4
LT		 820 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
821 return -EFAULT;
822
823 /* Check for wrap and zero */
824 if (eeprom.offset + eeprom.len <= eeprom.offset)
825 return -EINVAL;
826
827 /* Check for exceeding total eeprom len */
081d094e 828 if (eeprom.offset + eeprom.len > total_len)
1da177e4
LT		 829 return -EINVAL;
830
b131dd5d 831 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 832 if (!data)
833 return -ENOMEM;
834
b131dd5d
MSB		 835 bytes_remaining = eeprom.len;
836 while (bytes_remaining > 0) {
837 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
838
081d094e 839 ret = getter(dev, &eeprom, data);
b131dd5d
MSB		 840 if (ret)
841 break;
842 if (copy_to_user(userbuf, data, eeprom.len)) {
843 ret = -EFAULT;
844 break;
845 }
846 userbuf += eeprom.len;
847 eeprom.offset += eeprom.len;
848 bytes_remaining -= eeprom.len;
849 }
1da177e4 850
c5835df9
MSB		 851 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
852 eeprom.offset -= eeprom.len;
853 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
854 ret = -EFAULT;
855
1da177e4
LT		 856 kfree(data);
857 return ret;
858}
859
081d094e
BH		 860static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
861{
862 const struct ethtool_ops *ops = dev->ethtool_ops;
863
864 if (!ops->get_eeprom || !ops->get_eeprom_len)
865 return -EOPNOTSUPP;
866
867 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
868 ops->get_eeprom_len(dev));
869}
870
1da177e4
LT		 871static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
872{
873 struct ethtool_eeprom eeprom;
76fd8593 874 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 875 void __user *userbuf = useraddr + sizeof(eeprom);
876 u32 bytes_remaining;
1da177e4 877 u8 *data;
b131dd5d 878 int ret = 0;
1da177e4
LT		 879
880 if (!ops->set_eeprom || !ops->get_eeprom_len)
881 return -EOPNOTSUPP;
882
883 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
884 return -EFAULT;
885
886 /* Check for wrap and zero */
887 if (eeprom.offset + eeprom.len <= eeprom.offset)
888 return -EINVAL;
889
890 /* Check for exceeding total eeprom len */
891 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
892 return -EINVAL;
893
b131dd5d 894 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 895 if (!data)
896 return -ENOMEM;
897
b131dd5d
MSB		 898 bytes_remaining = eeprom.len;
899 while (bytes_remaining > 0) {
900 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
901
902 if (copy_from_user(data, userbuf, eeprom.len)) {
903 ret = -EFAULT;
904 break;
905 }
906 ret = ops->set_eeprom(dev, &eeprom, data);
907 if (ret)
908 break;
909 userbuf += eeprom.len;
910 eeprom.offset += eeprom.len;
911 bytes_remaining -= eeprom.len;
912 }
1da177e4 913
1da177e4
LT		 914 kfree(data);
915 return ret;
916}
917
97f8aefb 918static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
919 void __user *useraddr)
1da177e4 920{
8e557421 921 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1da177e4
LT		 922
923 if (!dev->ethtool_ops->get_coalesce)
924 return -EOPNOTSUPP;
925
926 dev->ethtool_ops->get_coalesce(dev, &coalesce);
927
928 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
929 return -EFAULT;
930 return 0;
931}
932
97f8aefb 933static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
934 void __user *useraddr)
1da177e4
LT		 935{
936 struct ethtool_coalesce coalesce;
937
fa04ae5c 938 if (!dev->ethtool_ops->set_coalesce)
1da177e4
LT		 939 return -EOPNOTSUPP;
940
941 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
942 return -EFAULT;
943
944 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
945}
946
947static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
948{
8e557421 949 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1da177e4
LT		 950
951 if (!dev->ethtool_ops->get_ringparam)
952 return -EOPNOTSUPP;
953
954 dev->ethtool_ops->get_ringparam(dev, &ringparam);
955
956 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
957 return -EFAULT;
958 return 0;
959}
960
961static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
962{
963 struct ethtool_ringparam ringparam;
964
965 if (!dev->ethtool_ops->set_ringparam)
966 return -EOPNOTSUPP;
967
968 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
969 return -EFAULT;
970
971 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
972}
973
8b5933c3 974static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
975 void __user *useraddr)
976{
977 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
978
979 if (!dev->ethtool_ops->get_channels)
980 return -EOPNOTSUPP;
981
982 dev->ethtool_ops->get_channels(dev, &channels);
983
984 if (copy_to_user(useraddr, &channels, sizeof(channels)))
985 return -EFAULT;
986 return 0;
987}
988
989static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
990 void __user *useraddr)
991{
992 struct ethtool_channels channels;
993
994 if (!dev->ethtool_ops->set_channels)
995 return -EOPNOTSUPP;
996
997 if (copy_from_user(&channels, useraddr, sizeof(channels)))
998 return -EFAULT;
999
1000 return dev->ethtool_ops->set_channels(dev, &channels);
1001}
1002
1da177e4
LT		 1003static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1004{
1005 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1006
1007 if (!dev->ethtool_ops->get_pauseparam)
1008 return -EOPNOTSUPP;
1009
1010 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1011
1012 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1013 return -EFAULT;
1014 return 0;
1015}
1016
1017static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1018{
1019 struct ethtool_pauseparam pauseparam;
1020
e1b90c41 1021 if (!dev->ethtool_ops->set_pauseparam)
1da177e4
LT		 1022 return -EOPNOTSUPP;
1023
1024 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1025 return -EFAULT;
1026
1027 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1028}
1029
1da177e4
LT		 1030static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1031{
1032 struct ethtool_test test;
76fd8593 1033 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1034 u64 *data;
ff03d49f 1035 int ret, test_len;
1da177e4 1036
a9828ec6 1037 if (!ops->self_test || !ops->get_sset_count)
1da177e4
LT		 1038 return -EOPNOTSUPP;
1039
a9828ec6 1040 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
ff03d49f
JG		 1041 if (test_len < 0)
1042 return test_len;
1043 WARN_ON(test_len == 0);
1044
1da177e4
LT		 1045 if (copy_from_user(&test, useraddr, sizeof(test)))
1046 return -EFAULT;
1047
ff03d49f
JG		 1048 test.len = test_len;
1049 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1da177e4
LT		 1050 if (!data)
1051 return -ENOMEM;
1052
1053 ops->self_test(dev, &test, data);
1054
1055 ret = -EFAULT;
1056 if (copy_to_user(useraddr, &test, sizeof(test)))
1057 goto out;
1058 useraddr += sizeof(test);
1059 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1060 goto out;
1061 ret = 0;
1062
1063 out:
1064 kfree(data);
1065 return ret;
1066}
1067
1068static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1069{
1070 struct ethtool_gstrings gstrings;
1da177e4
LT		 1071 u8 *data;
1072 int ret;
1073
1da177e4
LT		 1074 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1075 return -EFAULT;
1076
340ae165 1077 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
a9828ec6
BH		 1078 if (ret < 0)
1079 return ret;
1080
1081 gstrings.len = ret;
1da177e4
LT		 1082
1083 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1084 if (!data)
1085 return -ENOMEM;
1086
340ae165 1087 __ethtool_get_strings(dev, gstrings.string_set, data);
1da177e4
LT		 1088
1089 ret = -EFAULT;
1090 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1091 goto out;
1092 useraddr += sizeof(gstrings);
1093 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1094 goto out;
1095 ret = 0;
1096
340ae165 1097out:
1da177e4
LT		 1098 kfree(data);
1099 return ret;
1100}
1101
1102static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1103{
1104 struct ethtool_value id;
68f512f2 1105 static bool busy;
c03a14e8 1106 const struct ethtool_ops *ops = dev->ethtool_ops;
68f512f2 1107 int rc;
1da177e4 1108
c03a14e8 1109 if (!ops->set_phys_id)
1da177e4
LT		 1110 return -EOPNOTSUPP;
1111
68f512f2
BH		 1112 if (busy)
1113 return -EBUSY;
1114
1da177e4
LT		 1115 if (copy_from_user(&id, useraddr, sizeof(id)))
1116 return -EFAULT;
1117
c03a14e8 1118 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
fce55922 1119 if (rc < 0)
68f512f2
BH		 1120 return rc;
1121
1122 /* Drop the RTNL lock while waiting, but prevent reentry or
1123 * removal of the device.
1124 */
1125 busy = true;
1126 dev_hold(dev);
1127 rtnl_unlock();
1128
1129 if (rc == 0) {
1130 /* Driver will handle this itself */
1131 schedule_timeout_interruptible(
143780c6 1132 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
68f512f2 1133 } else {
fce55922
AB		 1134 /* Driver expects to be called at twice the frequency in rc */
1135 int n = rc * 2, i, interval = HZ / n;
1136
1137 /* Count down seconds */
68f512f2 1138 do {
fce55922
AB		 1139 /* Count down iterations per second */
1140 i = n;
1141 do {
1142 rtnl_lock();
c03a14e8 1143 rc = ops->set_phys_id(dev,
fce55922
AB		 1144 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1145 rtnl_unlock();
1146 if (rc)
1147 break;
1148 schedule_timeout_interruptible(interval);
1149 } while (!signal_pending(current) && --i != 0);
68f512f2
BH		 1150 } while (!signal_pending(current) &&
1151 (id.data == 0 || --id.data != 0));
1152 }
1153
1154 rtnl_lock();
1155 dev_put(dev);
1156 busy = false;
1157
c03a14e8 1158 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
68f512f2 1159 return rc;
1da177e4
LT		 1160}
1161
1162static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1163{
1164 struct ethtool_stats stats;
76fd8593 1165 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1166 u64 *data;
ff03d49f 1167 int ret, n_stats;
1da177e4 1168
a9828ec6 1169 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1da177e4
LT		 1170 return -EOPNOTSUPP;
1171
a9828ec6 1172 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
ff03d49f
JG		 1173 if (n_stats < 0)
1174 return n_stats;
1175 WARN_ON(n_stats == 0);
1176
1da177e4
LT		 1177 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1178 return -EFAULT;
1179
ff03d49f
JG		 1180 stats.n_stats = n_stats;
1181 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1da177e4
LT		 1182 if (!data)
1183 return -ENOMEM;
1184
1185 ops->get_ethtool_stats(dev, &stats, data);
1186
1187 ret = -EFAULT;
1188 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1189 goto out;
1190 useraddr += sizeof(stats);
1191 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1192 goto out;
1193 ret = 0;
1194
1195 out:
1196 kfree(data);
1197 return ret;
1198}
1199
0bf0519d 1200static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
a6f9a705
JW		 1201{
1202 struct ethtool_perm_addr epaddr;
a6f9a705 1203
313674af 1204 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
a6f9a705
JW		 1205 return -EFAULT;
1206
313674af
MW		 1207 if (epaddr.size < dev->addr_len)
1208 return -ETOOSMALL;
1209 epaddr.size = dev->addr_len;
a6f9a705 1210
a6f9a705 1211 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
313674af 1212 return -EFAULT;
a6f9a705 1213 useraddr += sizeof(epaddr);
313674af
MW		 1214 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1215 return -EFAULT;
1216 return 0;
a6f9a705
JW		 1217}
1218
13c99b24
JG		 1219static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1220 u32 cmd, u32 (*actor)(struct net_device *))
3ae7c0b2 1221{
8e557421 1222 struct ethtool_value edata = { .cmd = cmd };
3ae7c0b2 1223
13c99b24 1224 if (!actor)
3ae7c0b2
JG		 1225 return -EOPNOTSUPP;
1226
13c99b24 1227 edata.data = actor(dev);
3ae7c0b2
JG		 1228
1229 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1230 return -EFAULT;
1231 return 0;
1232}
1233
13c99b24
JG		 1234static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1235 void (*actor)(struct net_device *, u32))
3ae7c0b2
JG		 1236{
1237 struct ethtool_value edata;
1238
13c99b24 1239 if (!actor)
3ae7c0b2
JG		 1240 return -EOPNOTSUPP;
1241
1242 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1243 return -EFAULT;
1244
13c99b24 1245 actor(dev, edata.data);
339bf024
JG		 1246 return 0;
1247}
1248
13c99b24
JG		 1249static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1250 int (*actor)(struct net_device *, u32))
339bf024
JG		 1251{
1252 struct ethtool_value edata;
1253
13c99b24 1254 if (!actor)
339bf024
JG		 1255 return -EOPNOTSUPP;
1256
1257 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1258 return -EFAULT;
1259
13c99b24 1260 return actor(dev, edata.data);
339bf024
JG		 1261}
1262
97f8aefb 1263static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1264 char __user *useraddr)
05c6a8d7
AK		 1265{
1266 struct ethtool_flash efl;
1267
1268 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1269 return -EFAULT;
1270
1271 if (!dev->ethtool_ops->flash_device)
1272 return -EOPNOTSUPP;
1273
786f5281
BH		 1274 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
1275
05c6a8d7
AK		 1276 return dev->ethtool_ops->flash_device(dev, &efl);
1277}
1278
29dd54b7
AC		 1279static int ethtool_set_dump(struct net_device *dev,
1280 void __user *useraddr)
1281{
1282 struct ethtool_dump dump;
1283
1284 if (!dev->ethtool_ops->set_dump)
1285 return -EOPNOTSUPP;
1286
1287 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1288 return -EFAULT;
1289
1290 return dev->ethtool_ops->set_dump(dev, &dump);
1291}
1292
1293static int ethtool_get_dump_flag(struct net_device *dev,
1294 void __user *useraddr)
1295{
1296 int ret;
1297 struct ethtool_dump dump;
1298 const struct ethtool_ops *ops = dev->ethtool_ops;
1299
c03a14e8 1300 if (!ops->get_dump_flag)
29dd54b7
AC		 1301 return -EOPNOTSUPP;
1302
1303 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1304 return -EFAULT;
1305
1306 ret = ops->get_dump_flag(dev, &dump);
1307 if (ret)
1308 return ret;
1309
1310 if (copy_to_user(useraddr, &dump, sizeof(dump)))
1311 return -EFAULT;
1312 return 0;
1313}
1314
1315static int ethtool_get_dump_data(struct net_device *dev,
1316 void __user *useraddr)
1317{
1318 int ret;
1319 __u32 len;
1320 struct ethtool_dump dump, tmp;
1321 const struct ethtool_ops *ops = dev->ethtool_ops;
1322 void *data = NULL;
1323
c03a14e8 1324 if (!ops->get_dump_data || !ops->get_dump_flag)
29dd54b7
AC		 1325 return -EOPNOTSUPP;
1326
1327 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1328 return -EFAULT;
1329
1330 memset(&tmp, 0, sizeof(tmp));
1331 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
1332 ret = ops->get_dump_flag(dev, &tmp);
1333 if (ret)
1334 return ret;
1335
c590b5e2 1336 len = min(tmp.len, dump.len);
29dd54b7
AC		 1337 if (!len)
1338 return -EFAULT;
1339
c590b5e2
MS		 1340 /* Don't ever let the driver think there's more space available
1341 * than it requested with .get_dump_flag().
1342 */
1343 dump.len = len;
1344
1345 /* Always allocate enough space to hold the whole thing so that the
1346 * driver does not need to check the length and bother with partial
1347 * dumping.
1348 */
29dd54b7
AC		 1349 data = vzalloc(tmp.len);
1350 if (!data)
1351 return -ENOMEM;
1352 ret = ops->get_dump_data(dev, &dump, data);
1353 if (ret)
1354 goto out;
1355
c590b5e2
MS		 1356 /* There are two sane possibilities:
1357 * 1. The driver's .get_dump_data() does not touch dump.len.
1358 * 2. Or it may set dump.len to how much it really writes, which
1359 * should be tmp.len (or len if it can do a partial dump).
1360 * In any case respond to userspace with the actual length of data
1361 * it's receiving.
1362 */
1363 WARN_ON(dump.len != len && dump.len != tmp.len);
1364 dump.len = len;
1365
29dd54b7
AC		 1366 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
1367 ret = -EFAULT;
1368 goto out;
1369 }
1370 useraddr += offsetof(struct ethtool_dump, data);
1371 if (copy_to_user(useraddr, data, len))
1372 ret = -EFAULT;
1373out:
1374 vfree(data);
1375 return ret;
1376}
1377
c8f3a8c3
RC		 1378static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
1379{
1380 int err = 0;
1381 struct ethtool_ts_info info;
1382 const struct ethtool_ops *ops = dev->ethtool_ops;
1383 struct phy_device *phydev = dev->phydev;
1384
1385 memset(&info, 0, sizeof(info));
1386 info.cmd = ETHTOOL_GET_TS_INFO;
1387
1388 if (phydev && phydev->drv && phydev->drv->ts_info) {
c8f3a8c3 1389 err = phydev->drv->ts_info(phydev, &info);
c03a14e8 1390 } else if (ops->get_ts_info) {
c8f3a8c3 1391 err = ops->get_ts_info(dev, &info);
c8f3a8c3
RC		 1392 } else {
1393 info.so_timestamping =
1394 SOF_TIMESTAMPING_RX_SOFTWARE |
1395 SOF_TIMESTAMPING_SOFTWARE;
1396 info.phc_index = -1;
1397 }
1398
1399 if (err)
1400 return err;
1401
1402 if (copy_to_user(useraddr, &info, sizeof(info)))
1403 err = -EFAULT;
1404
1405 return err;
1406}
1407
41c3cb6d
SH		 1408static int ethtool_get_module_info(struct net_device *dev,
1409 void __user *useraddr)
1410{
1411 int ret;
1412 struct ethtool_modinfo modinfo;
1413 const struct ethtool_ops *ops = dev->ethtool_ops;
1414
1415 if (!ops->get_module_info)
1416 return -EOPNOTSUPP;
1417
1418 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
1419 return -EFAULT;
1420
1421 ret = ops->get_module_info(dev, &modinfo);
1422 if (ret)
1423 return ret;
1424
1425 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
1426 return -EFAULT;
1427
1428 return 0;
1429}
1430
1431static int ethtool_get_module_eeprom(struct net_device *dev,
1432 void __user *useraddr)
1433{
1434 int ret;
1435 struct ethtool_modinfo modinfo;
1436 const struct ethtool_ops *ops = dev->ethtool_ops;
1437
1438 if (!ops->get_module_info || !ops->get_module_eeprom)
1439 return -EOPNOTSUPP;
1440
1441 ret = ops->get_module_info(dev, &modinfo);
1442 if (ret)
1443 return ret;
1444
1445 return ethtool_get_any_eeprom(dev, useraddr, ops->get_module_eeprom,
1446 modinfo.eeprom_len);
1447}
1448
600fed5e 1449/* The main entry point in this file. Called from net/core/dev_ioctl.c */
1da177e4 1450
881d966b 1451int dev_ethtool(struct net *net, struct ifreq *ifr)
1da177e4 1452{
881d966b 1453 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1da177e4
LT		 1454 void __user *useraddr = ifr->ifr_data;
1455 u32 ethcmd;
1456 int rc;
b29d3145 1457 netdev_features_t old_features;
1da177e4 1458
1da177e4
LT		 1459 if (!dev || !netif_device_present(dev))
1460 return -ENODEV;
1461
97f8aefb 1462 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1da177e4
LT		 1463 return -EFAULT;
1464
75f3123c 1465 /* Allow some commands to be done by anyone */
97f8aefb 1466 switch (ethcmd) {
0fdc100b 1467 case ETHTOOL_GSET:
75f3123c 1468 case ETHTOOL_GDRVINFO:
75f3123c 1469 case ETHTOOL_GMSGLVL:
2da45db2 1470 case ETHTOOL_GLINK:
75f3123c
SH		 1471 case ETHTOOL_GCOALESCE:
1472 case ETHTOOL_GRINGPARAM:
1473 case ETHTOOL_GPAUSEPARAM:
1474 case ETHTOOL_GRXCSUM:
1475 case ETHTOOL_GTXCSUM:
1476 case ETHTOOL_GSG:
f80400a2 1477 case ETHTOOL_GSSET_INFO:
75f3123c 1478 case ETHTOOL_GSTRINGS:
2da45db2 1479 case ETHTOOL_GSTATS:
75f3123c
SH		 1480 case ETHTOOL_GTSO:
1481 case ETHTOOL_GPERMADDR:
1482 case ETHTOOL_GUFO:
1483 case ETHTOOL_GGSO:
1cab819b 1484 case ETHTOOL_GGRO:
339bf024
JG		 1485 case ETHTOOL_GFLAGS:
1486 case ETHTOOL_GPFLAGS:
0853ad66 1487 case ETHTOOL_GRXFH:
59089d8d
SB		 1488 case ETHTOOL_GRXRINGS:
1489 case ETHTOOL_GRXCLSRLCNT:
1490 case ETHTOOL_GRXCLSRULE:
1491 case ETHTOOL_GRXCLSRLALL:
2da45db2 1492 case ETHTOOL_GRXFHINDIR:
5455c699 1493 case ETHTOOL_GFEATURES:
2da45db2 1494 case ETHTOOL_GCHANNELS:
c8f3a8c3 1495 case ETHTOOL_GET_TS_INFO:
2da45db2 1496 case ETHTOOL_GEEE:
75f3123c
SH		 1497 break;
1498 default:
5e1fccc0 1499 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
75f3123c
SH		 1500 return -EPERM;
1501 }
1502
97f8aefb 1503 if (dev->ethtool_ops->begin) {
1504 rc = dev->ethtool_ops->begin(dev);
1505 if (rc < 0)
1da177e4 1506 return rc;
97f8aefb 1507 }
d8a33ac4
SH		 1508 old_features = dev->features;
1509
1da177e4
LT		 1510 switch (ethcmd) {
1511 case ETHTOOL_GSET:
1512 rc = ethtool_get_settings(dev, useraddr);
1513 break;
1514 case ETHTOOL_SSET:
1515 rc = ethtool_set_settings(dev, useraddr);
1516 break;
1517 case ETHTOOL_GDRVINFO:
1518 rc = ethtool_get_drvinfo(dev, useraddr);
1da177e4
LT		 1519 break;
1520 case ETHTOOL_GREGS:
1521 rc = ethtool_get_regs(dev, useraddr);
1522 break;
1523 case ETHTOOL_GWOL:
1524 rc = ethtool_get_wol(dev, useraddr);
1525 break;
1526 case ETHTOOL_SWOL:
1527 rc = ethtool_set_wol(dev, useraddr);
1528 break;
1529 case ETHTOOL_GMSGLVL:
13c99b24
JG		 1530 rc = ethtool_get_value(dev, useraddr, ethcmd,
1531 dev->ethtool_ops->get_msglevel);
1da177e4
LT		 1532 break;
1533 case ETHTOOL_SMSGLVL:
13c99b24
JG		 1534 rc = ethtool_set_value_void(dev, useraddr,
1535 dev->ethtool_ops->set_msglevel);
1da177e4 1536 break;
80f12ecc
YM		 1537 case ETHTOOL_GEEE:
1538 rc = ethtool_get_eee(dev, useraddr);
1539 break;
1540 case ETHTOOL_SEEE:
1541 rc = ethtool_set_eee(dev, useraddr);
1542 break;
1da177e4
LT		 1543 case ETHTOOL_NWAY_RST:
1544 rc = ethtool_nway_reset(dev);
1545 break;
1546 case ETHTOOL_GLINK:
e596e6e4 1547 rc = ethtool_get_link(dev, useraddr);
1da177e4
LT		 1548 break;
1549 case ETHTOOL_GEEPROM:
1550 rc = ethtool_get_eeprom(dev, useraddr);
1551 break;
1552 case ETHTOOL_SEEPROM:
1553 rc = ethtool_set_eeprom(dev, useraddr);
1554 break;
1555 case ETHTOOL_GCOALESCE:
1556 rc = ethtool_get_coalesce(dev, useraddr);
1557 break;
1558 case ETHTOOL_SCOALESCE:
1559 rc = ethtool_set_coalesce(dev, useraddr);
1560 break;
1561 case ETHTOOL_GRINGPARAM:
1562 rc = ethtool_get_ringparam(dev, useraddr);
1563 break;
1564 case ETHTOOL_SRINGPARAM:
1565 rc = ethtool_set_ringparam(dev, useraddr);
1566 break;
1567 case ETHTOOL_GPAUSEPARAM:
1568 rc = ethtool_get_pauseparam(dev, useraddr);
1569 break;
1570 case ETHTOOL_SPAUSEPARAM:
1571 rc = ethtool_set_pauseparam(dev, useraddr);
1572 break;
1da177e4
LT		 1573 case ETHTOOL_TEST:
1574 rc = ethtool_self_test(dev, useraddr);
1575 break;
1576 case ETHTOOL_GSTRINGS:
1577 rc = ethtool_get_strings(dev, useraddr);
1578 break;
1579 case ETHTOOL_PHYS_ID:
1580 rc = ethtool_phys_id(dev, useraddr);
1581 break;
1582 case ETHTOOL_GSTATS:
1583 rc = ethtool_get_stats(dev, useraddr);
1584 break;
a6f9a705
JW		 1585 case ETHTOOL_GPERMADDR:
1586 rc = ethtool_get_perm_addr(dev, useraddr);
1587 break;
3ae7c0b2 1588 case ETHTOOL_GFLAGS:
13c99b24 1589 rc = ethtool_get_value(dev, useraddr, ethcmd,
bc5787c6 1590 __ethtool_get_flags);
3ae7c0b2
JG		 1591 break;
1592 case ETHTOOL_SFLAGS:
da8ac86c 1593 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3ae7c0b2 1594 break;
339bf024 1595 case ETHTOOL_GPFLAGS:
13c99b24
JG		 1596 rc = ethtool_get_value(dev, useraddr, ethcmd,
1597 dev->ethtool_ops->get_priv_flags);
339bf024
JG		 1598 break;
1599 case ETHTOOL_SPFLAGS:
13c99b24
JG		 1600 rc = ethtool_set_value(dev, useraddr,
1601 dev->ethtool_ops->set_priv_flags);
339bf024 1602 break;
0853ad66 1603 case ETHTOOL_GRXFH:
59089d8d
SB		 1604 case ETHTOOL_GRXRINGS:
1605 case ETHTOOL_GRXCLSRLCNT:
1606 case ETHTOOL_GRXCLSRULE:
1607 case ETHTOOL_GRXCLSRLALL:
bf988435 1608 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
0853ad66
SB		 1609 break;
1610 case ETHTOOL_SRXFH:
59089d8d
SB		 1611 case ETHTOOL_SRXCLSRLDEL:
1612 case ETHTOOL_SRXCLSRLINS:
bf988435 1613 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
0853ad66 1614 break;
05c6a8d7
AK		 1615 case ETHTOOL_FLASHDEV:
1616 rc = ethtool_flash_device(dev, useraddr);
1617 break;
d73d3a8c
BH		 1618 case ETHTOOL_RESET:
1619 rc = ethtool_reset(dev, useraddr);
1620 break;
723b2f57
JG		 1621 case ETHTOOL_GSSET_INFO:
1622 rc = ethtool_get_sset_info(dev, useraddr);
1623 break;
a5b6ee29
BH		 1624 case ETHTOOL_GRXFHINDIR:
1625 rc = ethtool_get_rxfh_indir(dev, useraddr);
1626 break;
1627 case ETHTOOL_SRXFHINDIR:
1628 rc = ethtool_set_rxfh_indir(dev, useraddr);
1629 break;
5455c699
MM		 1630 case ETHTOOL_GFEATURES:
1631 rc = ethtool_get_features(dev, useraddr);
1632 break;
1633 case ETHTOOL_SFEATURES:
1634 rc = ethtool_set_features(dev, useraddr);
1635 break;
0a417704 1636 case ETHTOOL_GTXCSUM:
e83d360d 1637 case ETHTOOL_GRXCSUM:
0a417704
MM		 1638 case ETHTOOL_GSG:
1639 case ETHTOOL_GTSO:
1640 case ETHTOOL_GUFO:
1641 case ETHTOOL_GGSO:
1642 case ETHTOOL_GGRO:
1643 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
1644 break;
1645 case ETHTOOL_STXCSUM:
e83d360d 1646 case ETHTOOL_SRXCSUM:
0a417704
MM		 1647 case ETHTOOL_SSG:
1648 case ETHTOOL_STSO:
1649 case ETHTOOL_SUFO:
1650 case ETHTOOL_SGSO:
1651 case ETHTOOL_SGRO:
1652 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
1653 break;
8b5933c3 1654 case ETHTOOL_GCHANNELS:
1655 rc = ethtool_get_channels(dev, useraddr);
1656 break;
1657 case ETHTOOL_SCHANNELS:
1658 rc = ethtool_set_channels(dev, useraddr);
1659 break;
29dd54b7
AC		 1660 case ETHTOOL_SET_DUMP:
1661 rc = ethtool_set_dump(dev, useraddr);
1662 break;
1663 case ETHTOOL_GET_DUMP_FLAG:
1664 rc = ethtool_get_dump_flag(dev, useraddr);
1665 break;
1666 case ETHTOOL_GET_DUMP_DATA:
1667 rc = ethtool_get_dump_data(dev, useraddr);
1668 break;
c8f3a8c3
RC		 1669 case ETHTOOL_GET_TS_INFO:
1670 rc = ethtool_get_ts_info(dev, useraddr);
1671 break;
41c3cb6d
SH		 1672 case ETHTOOL_GMODULEINFO:
1673 rc = ethtool_get_module_info(dev, useraddr);
1674 break;
1675 case ETHTOOL_GMODULEEEPROM:
1676 rc = ethtool_get_module_eeprom(dev, useraddr);
1677 break;
1da177e4 1678 default:
61a44b9c 1679 rc = -EOPNOTSUPP;
1da177e4 1680 }
4ec93edb 1681
e71a4783 1682 if (dev->ethtool_ops->complete)
1da177e4 1683 dev->ethtool_ops->complete(dev);
d8a33ac4
SH		 1684
1685 if (old_features != dev->features)
1686 netdev_features_change(dev);
1687
1da177e4 1688 return rc;
1da177e4 1689}
Linux 6.x block layer and io_uring tree(s)