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[mirror_ubuntu-artful-kernel.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 26#include <linux/rtnetlink.h>
174cd4b1 27#include <linux/sched/signal.h>
960fb622 28#include <linux/net.h>
1da177e4 29
4ec93edb 30/*
1da177e4
LT		 31 * Some useful ethtool_ops methods that're device independent.
32 * If we find that all drivers want to do the same thing here,
33 * we can turn these into dev_() function calls.
34 */
35
36u32 ethtool_op_get_link(struct net_device *dev)
37{
38 return netif_carrier_ok(dev) ? 1 : 0;
39}
97f8aefb 40EXPORT_SYMBOL(ethtool_op_get_link);
1da177e4 41
02eacbd0
RC		 42int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
43{
44 info->so_timestamping =
45 SOF_TIMESTAMPING_TX_SOFTWARE |
46 SOF_TIMESTAMPING_RX_SOFTWARE |
47 SOF_TIMESTAMPING_SOFTWARE;
48 info->phc_index = -1;
49 return 0;
50}
51EXPORT_SYMBOL(ethtool_op_get_ts_info);
52
1da177e4
LT		 53/* Handlers for each ethtool command */
54
475414f6 55#define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
5455c699 56
9d921549
MM		 57static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
58 [NETIF_F_SG_BIT] = "tx-scatter-gather",
59 [NETIF_F_IP_CSUM_BIT] = "tx-checksum-ipv4",
9d921549
MM		 60 [NETIF_F_HW_CSUM_BIT] = "tx-checksum-ip-generic",
61 [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6",
62 [NETIF_F_HIGHDMA_BIT] = "highdma",
63 [NETIF_F_FRAGLIST_BIT] = "tx-scatter-gather-fraglist",
788dfcac 64 [NETIF_F_HW_VLAN_CTAG_TX_BIT] = "tx-vlan-hw-insert",
9d921549 65
788dfcac
FLVC		 66 [NETIF_F_HW_VLAN_CTAG_RX_BIT] = "rx-vlan-hw-parse",
67 [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
2d6577f1
DM		 68 [NETIF_F_HW_VLAN_STAG_TX_BIT] = "tx-vlan-stag-hw-insert",
69 [NETIF_F_HW_VLAN_STAG_RX_BIT] = "rx-vlan-stag-hw-parse",
70 [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
9d921549
MM		 71 [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged",
72 [NETIF_F_GSO_BIT] = "tx-generic-segmentation",
73 [NETIF_F_LLTX_BIT] = "tx-lockless",
74 [NETIF_F_NETNS_LOCAL_BIT] = "netns-local",
75 [NETIF_F_GRO_BIT] = "rx-gro",
76 [NETIF_F_LRO_BIT] = "rx-lro",
77
78 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation",
79 [NETIF_F_UFO_BIT] = "tx-udp-fragmentation",
80 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
81 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
cbc53e08 82 [NETIF_F_TSO_MANGLEID_BIT] = "tx-tcp-mangleid-segmentation",
9d921549
MM		 83 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
84 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
68c33163 85 [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
518f213d 86 [NETIF_F_GSO_GRE_CSUM_BIT] = "tx-gre-csum-segmentation",
7e13318d
TH		 87 [NETIF_F_GSO_IPXIP4_BIT] = "tx-ipxip4-segmentation",
88 [NETIF_F_GSO_IPXIP6_BIT] = "tx-ipxip6-segmentation",
73136267 89 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
518f213d 90 [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
802ab55a 91 [NETIF_F_GSO_PARTIAL_BIT] = "tx-gso-partial",
90017acc 92 [NETIF_F_GSO_SCTP_BIT] = "tx-sctp-segmentation",
9d921549
MM		 93
94 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
53692b1d 95 [NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
9d921549
MM		 96 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
97 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
98 [NETIF_F_RXHASH_BIT] = "rx-hashing",
99 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
100 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
101 [NETIF_F_LOOPBACK_BIT] = "loopback",
36eabda3 102 [NETIF_F_RXFCS_BIT] = "rx-fcs",
5e0c03c8 103 [NETIF_F_RXALL_BIT] = "rx-all",
a6cc0cfa 104 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
1c78c64e 105 [NETIF_F_HW_TC_BIT] = "hw-tc-offload",
9d921549
MM		 106};
107
892311f6
EP		 108static const char
109rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
110 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
111 [ETH_RSS_HASH_XOR_BIT] = "xor",
112};
113
a4244b0c
HHZ		 114static const char
115tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
116 [ETHTOOL_ID_UNSPEC] = "Unspec",
117 [ETHTOOL_RX_COPYBREAK] = "rx-copybreak",
118 [ETHTOOL_TX_COPYBREAK] = "tx-copybreak",
119};
120
968ad9da
RL		 121static const char
122phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
123 [ETHTOOL_ID_UNSPEC] = "Unspec",
65feddd5 124 [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
968ad9da
RL		 125};
126
5455c699
MM		 127static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
128{
129 struct ethtool_gfeatures cmd = {
130 .cmd = ETHTOOL_GFEATURES,
131 .size = ETHTOOL_DEV_FEATURE_WORDS,
132 };
475414f6 133 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
5455c699
MM		 134 u32 __user *sizeaddr;
135 u32 copy_size;
475414f6
MM		 136 int i;
137
138 /* in case feature bits run out again */
09da71b1 139 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
475414f6
MM		 140
141 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 142 features[i].available = (u32)(dev->hw_features >> (32 * i));
143 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
144 features[i].active = (u32)(dev->features >> (32 * i));
145 features[i].never_changed =
146 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
475414f6 147 }
5455c699
MM		 148
149 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
150 if (get_user(copy_size, sizeaddr))
151 return -EFAULT;
152
153 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
154 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
155
156 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
157 return -EFAULT;
158 useraddr += sizeof(cmd);
159 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
160 return -EFAULT;
161
162 return 0;
163}
164
165static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
166{
167 struct ethtool_sfeatures cmd;
168 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
475414f6
MM		 169 netdev_features_t wanted = 0, valid = 0;
170 int i, ret = 0;
5455c699
MM		 171
172 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
173 return -EFAULT;
174 useraddr += sizeof(cmd);
175
176 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
177 return -EINVAL;
178
179 if (copy_from_user(features, useraddr, sizeof(features)))
180 return -EFAULT;
181
475414f6 182 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 183 valid |= (netdev_features_t)features[i].valid << (32 * i);
184 wanted |= (netdev_features_t)features[i].requested << (32 * i);
475414f6
MM		 185 }
186
187 if (valid & ~NETIF_F_ETHTOOL_BITS)
5455c699
MM		 188 return -EINVAL;
189
475414f6
MM		 190 if (valid & ~dev->hw_features) {
191 valid &= dev->hw_features;
5455c699
MM		 192 ret |= ETHTOOL_F_UNSUPPORTED;
193 }
194
475414f6
MM		 195 dev->wanted_features &= ~valid;
196 dev->wanted_features |= wanted & valid;
6cb6a27c 197 __netdev_update_features(dev);
5455c699 198
475414f6 199 if ((dev->wanted_features ^ dev->features) & valid)
5455c699
MM		 200 ret |= ETHTOOL_F_WISH;
201
202 return ret;
203}
204
f3a40945
AL		 205static int phy_get_sset_count(struct phy_device *phydev)
206{
207 int ret;
208
209 if (phydev->drv->get_sset_count &&
210 phydev->drv->get_strings &&
211 phydev->drv->get_stats) {
212 mutex_lock(&phydev->lock);
213 ret = phydev->drv->get_sset_count(phydev);
214 mutex_unlock(&phydev->lock);
215
216 return ret;
217 }
218
219 return -EOPNOTSUPP;
220}
221
340ae165
MM		 222static int __ethtool_get_sset_count(struct net_device *dev, int sset)
223{
224 const struct ethtool_ops *ops = dev->ethtool_ops;
225
5455c699
MM		 226 if (sset == ETH_SS_FEATURES)
227 return ARRAY_SIZE(netdev_features_strings);
228
892311f6
EP		 229 if (sset == ETH_SS_RSS_HASH_FUNCS)
230 return ARRAY_SIZE(rss_hash_func_strings);
231
a4244b0c
HHZ		 232 if (sset == ETH_SS_TUNABLES)
233 return ARRAY_SIZE(tunable_strings);
234
968ad9da
RL		 235 if (sset == ETH_SS_PHY_TUNABLES)
236 return ARRAY_SIZE(phy_tunable_strings);
237
f3a40945
AL		 238 if (sset == ETH_SS_PHY_STATS) {
239 if (dev->phydev)
240 return phy_get_sset_count(dev->phydev);
241 else
242 return -EOPNOTSUPP;
243 }
244
c03a14e8 245 if (ops->get_sset_count && ops->get_strings)
340ae165
MM		 246 return ops->get_sset_count(dev, sset);
247 else
248 return -EOPNOTSUPP;
249}
250
251static void __ethtool_get_strings(struct net_device *dev,
252 u32 stringset, u8 *data)
253{
254 const struct ethtool_ops *ops = dev->ethtool_ops;
255
5455c699
MM		 256 if (stringset == ETH_SS_FEATURES)
257 memcpy(data, netdev_features_strings,
258 sizeof(netdev_features_strings));
892311f6
EP		 259 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
260 memcpy(data, rss_hash_func_strings,
261 sizeof(rss_hash_func_strings));
a4244b0c
HHZ		 262 else if (stringset == ETH_SS_TUNABLES)
263 memcpy(data, tunable_strings, sizeof(tunable_strings));
968ad9da
RL		 264 else if (stringset == ETH_SS_PHY_TUNABLES)
265 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
f3a40945
AL		 266 else if (stringset == ETH_SS_PHY_STATS) {
267 struct phy_device *phydev = dev->phydev;
268
269 if (phydev) {
270 mutex_lock(&phydev->lock);
271 phydev->drv->get_strings(phydev, data);
272 mutex_unlock(&phydev->lock);
273 } else {
274 return;
275 }
276 } else
5455c699
MM		 277 /* ops->get_strings is valid because checked earlier */
278 ops->get_strings(dev, stringset, data);
340ae165
MM		 279}
280
c8f44aff 281static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
0a417704
MM		 282{
283 /* feature masks of legacy discrete ethtool ops */
284
285 switch (eth_cmd) {
286 case ETHTOOL_GTXCSUM:
287 case ETHTOOL_STXCSUM:
a188222b 288 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
e83d360d
MM		 289 case ETHTOOL_GRXCSUM:
290 case ETHTOOL_SRXCSUM:
291 return NETIF_F_RXCSUM;
0a417704
MM		 292 case ETHTOOL_GSG:
293 case ETHTOOL_SSG:
294 return NETIF_F_SG;
295 case ETHTOOL_GTSO:
296 case ETHTOOL_STSO:
297 return NETIF_F_ALL_TSO;
298 case ETHTOOL_GUFO:
299 case ETHTOOL_SUFO:
300 return NETIF_F_UFO;
301 case ETHTOOL_GGSO:
302 case ETHTOOL_SGSO:
303 return NETIF_F_GSO;
304 case ETHTOOL_GGRO:
305 case ETHTOOL_SGRO:
306 return NETIF_F_GRO;
307 default:
308 BUG();
309 }
310}
311
0a417704
MM		 312static int ethtool_get_one_feature(struct net_device *dev,
313 char __user *useraddr, u32 ethcmd)
314{
c8f44aff 315 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
0a417704
MM		 316 struct ethtool_value edata = {
317 .cmd = ethcmd,
86794881 318 .data = !!(dev->features & mask),
0a417704 319 };
0a417704 320
0a417704
MM		 321 if (copy_to_user(useraddr, &edata, sizeof(edata)))
322 return -EFAULT;
323 return 0;
324}
325
0a417704
MM		 326static int ethtool_set_one_feature(struct net_device *dev,
327 void __user *useraddr, u32 ethcmd)
328{
329 struct ethtool_value edata;
c8f44aff 330 netdev_features_t mask;
0a417704
MM		 331
332 if (copy_from_user(&edata, useraddr, sizeof(edata)))
333 return -EFAULT;
334
86794881
MM		 335 mask = ethtool_get_feature_mask(ethcmd);
336 mask &= dev->hw_features;
bc5787c6
MM		 337 if (!mask)
338 return -EOPNOTSUPP;
86794881 339
bc5787c6
MM		 340 if (edata.data)
341 dev->wanted_features |= mask;
342 else
343 dev->wanted_features &= ~mask;
86794881 344
bc5787c6 345 __netdev_update_features(dev);
86794881 346
bc5787c6
MM		 347 return 0;
348}
349
02b3a552
MM		 350#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
351 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
f646968f
PM		 352#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
353 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
354 NETIF_F_RXHASH)
bc5787c6
MM		 355
356static u32 __ethtool_get_flags(struct net_device *dev)
357{
02b3a552
MM		 358 u32 flags = 0;
359
8a73125c
DF		 360 if (dev->features & NETIF_F_LRO)
361 flags |= ETH_FLAG_LRO;
362 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
363 flags |= ETH_FLAG_RXVLAN;
364 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
365 flags |= ETH_FLAG_TXVLAN;
366 if (dev->features & NETIF_F_NTUPLE)
367 flags |= ETH_FLAG_NTUPLE;
368 if (dev->features & NETIF_F_RXHASH)
369 flags |= ETH_FLAG_RXHASH;
02b3a552
MM		 370
371 return flags;
0a417704
MM		 372}
373
bc5787c6 374static int __ethtool_set_flags(struct net_device *dev, u32 data)
da8ac86c 375{
c8f44aff 376 netdev_features_t features = 0, changed;
da8ac86c 377
02b3a552 378 if (data & ~ETH_ALL_FLAGS)
da8ac86c
MM		 379 return -EINVAL;
380
8a73125c
DF		 381 if (data & ETH_FLAG_LRO)
382 features |= NETIF_F_LRO;
383 if (data & ETH_FLAG_RXVLAN)
384 features |= NETIF_F_HW_VLAN_CTAG_RX;
385 if (data & ETH_FLAG_TXVLAN)
386 features |= NETIF_F_HW_VLAN_CTAG_TX;
387 if (data & ETH_FLAG_NTUPLE)
388 features |= NETIF_F_NTUPLE;
389 if (data & ETH_FLAG_RXHASH)
390 features |= NETIF_F_RXHASH;
02b3a552 391
da8ac86c 392 /* allow changing only bits set in hw_features */
02b3a552 393 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
da8ac86c
MM		 394 if (changed & ~dev->hw_features)
395 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
396
397 dev->wanted_features =
02b3a552 398 (dev->wanted_features & ~changed) | (features & changed);
da8ac86c 399
6cb6a27c 400 __netdev_update_features(dev);
da8ac86c
MM		 401
402 return 0;
403}
404
6d62b4d5
PR		 405void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
406 u32 legacy_u32)
3f1ac7a7
DD		 407{
408 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
409 dst[0] = legacy_u32;
410}
6d62b4d5 411EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
3f1ac7a7
DD		 412
413/* return false if src had higher bits set. lower bits always updated. */
6d62b4d5
PR		 414bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
415 const unsigned long *src)
3f1ac7a7
DD		 416{
417 bool retval = true;
418
419 /* TODO: following test will soon always be true */
420 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
421 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
422
423 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
424 bitmap_fill(ext, 32);
425 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
426 if (bitmap_intersects(ext, src,
427 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
428 /* src mask goes beyond bit 31 */
429 retval = false;
430 }
431 }
432 *legacy_u32 = src[0];
433 return retval;
434}
6d62b4d5 435EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
3f1ac7a7
DD		 436
437/* return false if legacy contained non-0 deprecated fields
438 * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
439 */
440static bool
441convert_legacy_settings_to_link_ksettings(
442 struct ethtool_link_ksettings *link_ksettings,
443 const struct ethtool_cmd *legacy_settings)
444{
445 bool retval = true;
446
447 memset(link_ksettings, 0, sizeof(*link_ksettings));
448
449 /* This is used to tell users that driver is still using these
450 * deprecated legacy fields, and they should not use
451 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
452 */
453 if (legacy_settings->transceiver ||
454 legacy_settings->maxtxpkt ||
455 legacy_settings->maxrxpkt)
456 retval = false;
457
6d62b4d5 458 ethtool_convert_legacy_u32_to_link_mode(
3f1ac7a7
DD		 459 link_ksettings->link_modes.supported,
460 legacy_settings->supported);
6d62b4d5 461 ethtool_convert_legacy_u32_to_link_mode(
3f1ac7a7
DD		 462 link_ksettings->link_modes.advertising,
463 legacy_settings->advertising);
6d62b4d5 464 ethtool_convert_legacy_u32_to_link_mode(
3f1ac7a7
DD		 465 link_ksettings->link_modes.lp_advertising,
466 legacy_settings->lp_advertising);
467 link_ksettings->base.speed
468 = ethtool_cmd_speed(legacy_settings);
469 link_ksettings->base.duplex
470 = legacy_settings->duplex;
471 link_ksettings->base.port
472 = legacy_settings->port;
473 link_ksettings->base.phy_address
474 = legacy_settings->phy_address;
475 link_ksettings->base.autoneg
476 = legacy_settings->autoneg;
477 link_ksettings->base.mdio_support
478 = legacy_settings->mdio_support;
479 link_ksettings->base.eth_tp_mdix
480 = legacy_settings->eth_tp_mdix;
481 link_ksettings->base.eth_tp_mdix_ctrl
482 = legacy_settings->eth_tp_mdix_ctrl;
483 return retval;
484}
485
486/* return false if ksettings link modes had higher bits
487 * set. legacy_settings always updated (best effort)
488 */
489static bool
490convert_link_ksettings_to_legacy_settings(
491 struct ethtool_cmd *legacy_settings,
492 const struct ethtool_link_ksettings *link_ksettings)
493{
494 bool retval = true;
495
496 memset(legacy_settings, 0, sizeof(*legacy_settings));
497 /* this also clears the deprecated fields in legacy structure:
498 * __u8 transceiver;
499 * __u32 maxtxpkt;
500 * __u32 maxrxpkt;
501 */
502
6d62b4d5 503 retval &= ethtool_convert_link_mode_to_legacy_u32(
3f1ac7a7
DD		 504 &legacy_settings->supported,
505 link_ksettings->link_modes.supported);
6d62b4d5 506 retval &= ethtool_convert_link_mode_to_legacy_u32(
3f1ac7a7
DD		 507 &legacy_settings->advertising,
508 link_ksettings->link_modes.advertising);
6d62b4d5 509 retval &= ethtool_convert_link_mode_to_legacy_u32(
3f1ac7a7
DD		 510 &legacy_settings->lp_advertising,
511 link_ksettings->link_modes.lp_advertising);
512 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
513 legacy_settings->duplex
514 = link_ksettings->base.duplex;
515 legacy_settings->port
516 = link_ksettings->base.port;
517 legacy_settings->phy_address
518 = link_ksettings->base.phy_address;
519 legacy_settings->autoneg
520 = link_ksettings->base.autoneg;
521 legacy_settings->mdio_support
522 = link_ksettings->base.mdio_support;
523 legacy_settings->eth_tp_mdix
524 = link_ksettings->base.eth_tp_mdix;
525 legacy_settings->eth_tp_mdix_ctrl
526 = link_ksettings->base.eth_tp_mdix_ctrl;
527 return retval;
528}
529
530/* number of 32-bit words to store the user's link mode bitmaps */
531#define __ETHTOOL_LINK_MODE_MASK_NU32 \
532 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
533
534/* layout of the struct passed from/to userland */
535struct ethtool_link_usettings {
536 struct ethtool_link_settings base;
537 struct {
538 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
539 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
540 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
541 } link_modes;
542};
543
544/* Internal kernel helper to query a device ethtool_link_settings.
545 *
546 * Backward compatibility note: for compatibility with legacy drivers
547 * that implement only the ethtool_cmd API, this has to work with both
548 * drivers implementing get_link_ksettings API and drivers
549 * implementing get_settings API. When drivers implement get_settings
550 * and report ethtool_cmd deprecated fields
551 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
552 * because the resulting struct ethtool_link_settings does not report them.
553 */
554int __ethtool_get_link_ksettings(struct net_device *dev,
555 struct ethtool_link_ksettings *link_ksettings)
556{
557 int err;
558 struct ethtool_cmd cmd;
559
560 ASSERT_RTNL();
561
562 if (dev->ethtool_ops->get_link_ksettings) {
563 memset(link_ksettings, 0, sizeof(*link_ksettings));
564 return dev->ethtool_ops->get_link_ksettings(dev,
565 link_ksettings);
566 }
567
568 /* driver doesn't support %ethtool_link_ksettings API. revert to
569 * legacy %ethtool_cmd API, unless it's not supported either.
570 * TODO: remove when ethtool_ops::get_settings disappears internally
571 */
3237fc63
DD		 572 if (!dev->ethtool_ops->get_settings)
573 return -EOPNOTSUPP;
574
575 memset(&cmd, 0, sizeof(cmd));
576 cmd.cmd = ETHTOOL_GSET;
577 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 578 if (err < 0)
579 return err;
580
581 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
582 */
583 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
584 return err;
585}
586EXPORT_SYMBOL(__ethtool_get_link_ksettings);
587
588/* convert ethtool_link_usettings in user space to a kernel internal
589 * ethtool_link_ksettings. return 0 on success, errno on error.
590 */
591static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
592 const void __user *from)
593{
594 struct ethtool_link_usettings link_usettings;
595
596 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
597 return -EFAULT;
598
599 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
600 bitmap_from_u32array(to->link_modes.supported,
601 __ETHTOOL_LINK_MODE_MASK_NBITS,
602 link_usettings.link_modes.supported,
603 __ETHTOOL_LINK_MODE_MASK_NU32);
604 bitmap_from_u32array(to->link_modes.advertising,
605 __ETHTOOL_LINK_MODE_MASK_NBITS,
606 link_usettings.link_modes.advertising,
607 __ETHTOOL_LINK_MODE_MASK_NU32);
608 bitmap_from_u32array(to->link_modes.lp_advertising,
609 __ETHTOOL_LINK_MODE_MASK_NBITS,
610 link_usettings.link_modes.lp_advertising,
611 __ETHTOOL_LINK_MODE_MASK_NU32);
612
613 return 0;
614}
615
616/* convert a kernel internal ethtool_link_ksettings to
617 * ethtool_link_usettings in user space. return 0 on success, errno on
618 * error.
619 */
620static int
621store_link_ksettings_for_user(void __user *to,
622 const struct ethtool_link_ksettings *from)
623{
624 struct ethtool_link_usettings link_usettings;
625
626 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
627 bitmap_to_u32array(link_usettings.link_modes.supported,
628 __ETHTOOL_LINK_MODE_MASK_NU32,
629 from->link_modes.supported,
630 __ETHTOOL_LINK_MODE_MASK_NBITS);
631 bitmap_to_u32array(link_usettings.link_modes.advertising,
632 __ETHTOOL_LINK_MODE_MASK_NU32,
633 from->link_modes.advertising,
634 __ETHTOOL_LINK_MODE_MASK_NBITS);
635 bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
636 __ETHTOOL_LINK_MODE_MASK_NU32,
637 from->link_modes.lp_advertising,
638 __ETHTOOL_LINK_MODE_MASK_NBITS);
639
640 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
641 return -EFAULT;
642
643 return 0;
644}
645
646/* Query device for its ethtool_link_settings.
647 *
648 * Backward compatibility note: this function must fail when driver
649 * does not implement ethtool::get_link_ksettings, even if legacy
650 * ethtool_ops::get_settings is implemented. This tells new versions
651 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
652 * this driver, so that they can correctly access the ethtool_cmd
653 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
654 * implements ethtool_ops::get_settings anymore.
655 */
656static int ethtool_get_link_ksettings(struct net_device *dev,
657 void __user *useraddr)
658{
659 int err = 0;
660 struct ethtool_link_ksettings link_ksettings;
661
662 ASSERT_RTNL();
663
664 if (!dev->ethtool_ops->get_link_ksettings)
665 return -EOPNOTSUPP;
666
667 /* handle bitmap nbits handshake */
668 if (copy_from_user(&link_ksettings.base, useraddr,
669 sizeof(link_ksettings.base)))
670 return -EFAULT;
671
672 if (__ETHTOOL_LINK_MODE_MASK_NU32
673 != link_ksettings.base.link_mode_masks_nwords) {
674 /* wrong link mode nbits requested */
675 memset(&link_ksettings, 0, sizeof(link_ksettings));
793cf87d 676 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
3f1ac7a7
DD		 677 /* send back number of words required as negative val */
678 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
679 "need too many bits for link modes!");
680 link_ksettings.base.link_mode_masks_nwords
681 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
682
683 /* copy the base fields back to user, not the link
684 * mode bitmaps
685 */
686 if (copy_to_user(useraddr, &link_ksettings.base,
687 sizeof(link_ksettings.base)))
688 return -EFAULT;
689
690 return 0;
691 }
692
693 /* handshake successful: user/kernel agree on
694 * link_mode_masks_nwords
695 */
696
697 memset(&link_ksettings, 0, sizeof(link_ksettings));
698 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
699 if (err < 0)
700 return err;
701
702 /* make sure we tell the right values to user */
703 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
704 link_ksettings.base.link_mode_masks_nwords
705 = __ETHTOOL_LINK_MODE_MASK_NU32;
706
707 return store_link_ksettings_for_user(useraddr, &link_ksettings);
708}
709
710/* Update device ethtool_link_settings.
711 *
712 * Backward compatibility note: this function must fail when driver
713 * does not implement ethtool::set_link_ksettings, even if legacy
714 * ethtool_ops::set_settings is implemented. This tells new versions
715 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
716 * this driver, so that they can correctly update the ethtool_cmd
717 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
718 * implements ethtool_ops::get_settings anymore.
719 */
720static int ethtool_set_link_ksettings(struct net_device *dev,
721 void __user *useraddr)
722{
723 int err;
724 struct ethtool_link_ksettings link_ksettings;
725
726 ASSERT_RTNL();
727
728 if (!dev->ethtool_ops->set_link_ksettings)
729 return -EOPNOTSUPP;
730
731 /* make sure nbits field has expected value */
732 if (copy_from_user(&link_ksettings.base, useraddr,
733 sizeof(link_ksettings.base)))
734 return -EFAULT;
735
736 if (__ETHTOOL_LINK_MODE_MASK_NU32
737 != link_ksettings.base.link_mode_masks_nwords)
738 return -EINVAL;
739
740 /* copy the whole structure, now that we know it has expected
741 * format
742 */
743 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
744 if (err)
745 return err;
746
747 /* re-check nwords field, just in case */
748 if (__ETHTOOL_LINK_MODE_MASK_NU32
749 != link_ksettings.base.link_mode_masks_nwords)
750 return -EINVAL;
751
752 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
753}
754
3f1ac7a7
DD		 755static void
756warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
757{
758 char name[sizeof(current->comm)];
759
760 pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
761 get_task_comm(name, current), details);
762}
763
764/* Query device for its ethtool_cmd settings.
765 *
766 * Backward compatibility note: for compatibility with legacy ethtool,
767 * this has to work with both drivers implementing get_link_ksettings
768 * API and drivers implementing get_settings API. When drivers
769 * implement get_link_ksettings and report higher link mode bits, a
770 * kernel warning is logged once (with name of 1st driver/device) to
771 * recommend user to upgrade ethtool, but the command is successful
772 * (only the lower link mode bits reported back to user).
773 */
4bc71cb9
JP		 774static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
775{
4bc71cb9
JP		 776 struct ethtool_cmd cmd;
777
3f1ac7a7
DD		 778 ASSERT_RTNL();
779
780 if (dev->ethtool_ops->get_link_ksettings) {
781 /* First, use link_ksettings API if it is supported */
782 int err;
783 struct ethtool_link_ksettings link_ksettings;
784
785 memset(&link_ksettings, 0, sizeof(link_ksettings));
786 err = dev->ethtool_ops->get_link_ksettings(dev,
787 &link_ksettings);
788 if (err < 0)
789 return err;
790 if (!convert_link_ksettings_to_legacy_settings(&cmd,
791 &link_ksettings))
792 warn_incomplete_ethtool_legacy_settings_conversion(
793 "link modes are only partially reported");
794
795 /* send a sensible cmd tag back to user */
796 cmd.cmd = ETHTOOL_GSET;
797 } else {
3f1ac7a7
DD		 798 /* driver doesn't support %ethtool_link_ksettings
799 * API. revert to legacy %ethtool_cmd API, unless it's
800 * not supported either.
801 */
3237fc63
DD		 802 int err;
803
804 if (!dev->ethtool_ops->get_settings)
805 return -EOPNOTSUPP;
806
807 memset(&cmd, 0, sizeof(cmd));
808 cmd.cmd = ETHTOOL_GSET;
809 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 810 if (err < 0)
811 return err;
812 }
1da177e4
LT		 813
814 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
815 return -EFAULT;
3f1ac7a7 816
1da177e4
LT		 817 return 0;
818}
819
3f1ac7a7
DD		 820/* Update device link settings with given ethtool_cmd.
821 *
822 * Backward compatibility note: for compatibility with legacy ethtool,
823 * this has to work with both drivers implementing set_link_ksettings
824 * API and drivers implementing set_settings API. When drivers
825 * implement set_link_ksettings and user's request updates deprecated
826 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
827 * warning is logged once (with name of 1st driver/device) to
828 * recommend user to upgrade ethtool, and the request is rejected.
829 */
1da177e4
LT		 830static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
831{
832 struct ethtool_cmd cmd;
833
3f1ac7a7 834 ASSERT_RTNL();
1da177e4
LT		 835
836 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
837 return -EFAULT;
838
3f1ac7a7
DD		 839 /* first, try new %ethtool_link_ksettings API. */
840 if (dev->ethtool_ops->set_link_ksettings) {
841 struct ethtool_link_ksettings link_ksettings;
842
843 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
844 &cmd))
845 return -EINVAL;
846
847 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
848 link_ksettings.base.link_mode_masks_nwords
849 = __ETHTOOL_LINK_MODE_MASK_NU32;
850 return dev->ethtool_ops->set_link_ksettings(dev,
851 &link_ksettings);
852 }
853
854 /* legacy %ethtool_cmd API */
855
856 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
857 * disappears internally
858 */
859
860 if (!dev->ethtool_ops->set_settings)
861 return -EOPNOTSUPP;
862
1da177e4
LT		 863 return dev->ethtool_ops->set_settings(dev, &cmd);
864}
865
97f8aefb 866static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
867 void __user *useraddr)
1da177e4
LT		 868{
869 struct ethtool_drvinfo info;
76fd8593 870 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 871
1da177e4
LT		 872 memset(&info, 0, sizeof(info));
873 info.cmd = ETHTOOL_GDRVINFO;
c03a14e8 874 if (ops->get_drvinfo) {
01414802
BH		 875 ops->get_drvinfo(dev, &info);
876 } else if (dev->dev.parent && dev->dev.parent->driver) {
877 strlcpy(info.bus_info, dev_name(dev->dev.parent),
878 sizeof(info.bus_info));
879 strlcpy(info.driver, dev->dev.parent->driver->name,
880 sizeof(info.driver));
881 } else {
882 return -EOPNOTSUPP;
883 }
1da177e4 884
723b2f57
JG		 885 /*
886 * this method of obtaining string set info is deprecated;
d17792eb 887 * Use ETHTOOL_GSSET_INFO instead.
723b2f57 888 */
c03a14e8 889 if (ops->get_sset_count) {
ff03d49f
JG		 890 int rc;
891
892 rc = ops->get_sset_count(dev, ETH_SS_TEST);
893 if (rc >= 0)
894 info.testinfo_len = rc;
895 rc = ops->get_sset_count(dev, ETH_SS_STATS);
896 if (rc >= 0)
897 info.n_stats = rc;
339bf024
JG		 898 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
899 if (rc >= 0)
900 info.n_priv_flags = rc;
ff03d49f 901 }
c03a14e8 902 if (ops->get_regs_len)
1da177e4 903 info.regdump_len = ops->get_regs_len(dev);
c03a14e8 904 if (ops->get_eeprom_len)
1da177e4
LT		 905 info.eedump_len = ops->get_eeprom_len(dev);
906
907 if (copy_to_user(useraddr, &info, sizeof(info)))
908 return -EFAULT;
909 return 0;
910}
911
f5c445ed 912static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
97f8aefb 913 void __user *useraddr)
723b2f57
JG		 914{
915 struct ethtool_sset_info info;
723b2f57
JG		 916 u64 sset_mask;
917 int i, idx = 0, n_bits = 0, ret, rc;
918 u32 *info_buf = NULL;
919
723b2f57
JG		 920 if (copy_from_user(&info, useraddr, sizeof(info)))
921 return -EFAULT;
922
923 /* store copy of mask, because we zero struct later on */
924 sset_mask = info.sset_mask;
925 if (!sset_mask)
926 return 0;
927
928 /* calculate size of return buffer */
d17792eb 929 n_bits = hweight64(sset_mask);
723b2f57
JG		 930
931 memset(&info, 0, sizeof(info));
932 info.cmd = ETHTOOL_GSSET_INFO;
933
934 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
935 if (!info_buf)
936 return -ENOMEM;
937
938 /*
939 * fill return buffer based on input bitmask and successful
940 * get_sset_count return
941 */
942 for (i = 0; i < 64; i++) {
943 if (!(sset_mask & (1ULL << i)))
944 continue;
945
340ae165 946 rc = __ethtool_get_sset_count(dev, i);
723b2f57
JG		 947 if (rc >= 0) {
948 info.sset_mask |= (1ULL << i);
949 info_buf[idx++] = rc;
950 }
951 }
952
953 ret = -EFAULT;
954 if (copy_to_user(useraddr, &info, sizeof(info)))
955 goto out;
956
957 useraddr += offsetof(struct ethtool_sset_info, data);
958 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
959 goto out;
960
961 ret = 0;
962
963out:
964 kfree(info_buf);
965 return ret;
966}
967
97f8aefb 968static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
bf988435 969 u32 cmd, void __user *useraddr)
0853ad66 970{
bf988435
BH		 971 struct ethtool_rxnfc info;
972 size_t info_size = sizeof(info);
55664f32 973 int rc;
0853ad66 974
59089d8d 975 if (!dev->ethtool_ops->set_rxnfc)
0853ad66
SB		 976 return -EOPNOTSUPP;
977
bf988435
BH		 978 /* struct ethtool_rxnfc was originally defined for
979 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
980 * members. User-space might still be using that
981 * definition. */
982 if (cmd == ETHTOOL_SRXFH)
983 info_size = (offsetof(struct ethtool_rxnfc, data) +
984 sizeof(info.data));
985
986 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 987 return -EFAULT;
988
55664f32
BH		 989 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
990 if (rc)
991 return rc;
992
993 if (cmd == ETHTOOL_SRXCLSRLINS &&
994 copy_to_user(useraddr, &info, info_size))
995 return -EFAULT;
996
997 return 0;
0853ad66
SB		 998}
999
97f8aefb 1000static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
bf988435 1001 u32 cmd, void __user *useraddr)
0853ad66
SB		 1002{
1003 struct ethtool_rxnfc info;
bf988435 1004 size_t info_size = sizeof(info);
59089d8d
SB		 1005 const struct ethtool_ops *ops = dev->ethtool_ops;
1006 int ret;
1007 void *rule_buf = NULL;
0853ad66 1008
59089d8d 1009 if (!ops->get_rxnfc)
0853ad66
SB		 1010 return -EOPNOTSUPP;
1011
bf988435
BH		 1012 /* struct ethtool_rxnfc was originally defined for
1013 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1014 * members. User-space might still be using that
1015 * definition. */
1016 if (cmd == ETHTOOL_GRXFH)
1017 info_size = (offsetof(struct ethtool_rxnfc, data) +
1018 sizeof(info.data));
1019
1020 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 1021 return -EFAULT;
1022
59089d8d
SB		 1023 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1024 if (info.rule_cnt > 0) {
db048b69 1025 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
ae6df5f9 1026 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
db048b69 1027 GFP_USER);
59089d8d
SB		 1028 if (!rule_buf)
1029 return -ENOMEM;
1030 }
1031 }
0853ad66 1032
59089d8d
SB		 1033 ret = ops->get_rxnfc(dev, &info, rule_buf);
1034 if (ret < 0)
1035 goto err_out;
1036
1037 ret = -EFAULT;
bf988435 1038 if (copy_to_user(useraddr, &info, info_size))
59089d8d
SB		 1039 goto err_out;
1040
1041 if (rule_buf) {
1042 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1043 if (copy_to_user(useraddr, rule_buf,
1044 info.rule_cnt * sizeof(u32)))
1045 goto err_out;
1046 }
1047 ret = 0;
1048
1049err_out:
c9caceca 1050 kfree(rule_buf);
59089d8d
SB		 1051
1052 return ret;
0853ad66
SB		 1053}
1054
3de0b592
VD		 1055static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1056 struct ethtool_rxnfc *rx_rings,
1057 u32 size)
1058{
fb95cd8d 1059 int i;
3de0b592
VD		 1060
1061 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
fb95cd8d 1062 return -EFAULT;
3de0b592
VD		 1063
1064 /* Validate ring indices */
fb95cd8d
BH		 1065 for (i = 0; i < size; i++)
1066 if (indir[i] >= rx_rings->data)
1067 return -EINVAL;
1068
1069 return 0;
3de0b592
VD		 1070}
1071
ba905f5e 1072u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
960fb622
ED		 1073
1074void netdev_rss_key_fill(void *buffer, size_t len)
1075{
1076 BUG_ON(len > sizeof(netdev_rss_key));
1077 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1078 memcpy(buffer, netdev_rss_key, len);
1079}
1080EXPORT_SYMBOL(netdev_rss_key_fill);
1081
d4ab4286
KJ		 1082static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1083{
1084 u32 dev_size, current_max = 0;
1085 u32 *indir;
1086 int ret;
1087
1088 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1089 !dev->ethtool_ops->get_rxfh)
1090 return -EOPNOTSUPP;
1091 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1092 if (dev_size == 0)
1093 return -EOPNOTSUPP;
1094
1095 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1096 if (!indir)
1097 return -ENOMEM;
1098
1099 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1100 if (ret)
1101 goto out;
1102
1103 while (dev_size--)
1104 current_max = max(current_max, indir[dev_size]);
1105
1106 *max = current_max;
1107
1108out:
1109 kfree(indir);
1110 return ret;
1111}
1112
a5b6ee29
BH		 1113static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1114 void __user *useraddr)
1115{
7850f63f
BH		 1116 u32 user_size, dev_size;
1117 u32 *indir;
a5b6ee29
BH		 1118 int ret;
1119
7850f63f 1120 if (!dev->ethtool_ops->get_rxfh_indir_size ||
fe62d001 1121 !dev->ethtool_ops->get_rxfh)
7850f63f
BH		 1122 return -EOPNOTSUPP;
1123 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1124 if (dev_size == 0)
a5b6ee29
BH		 1125 return -EOPNOTSUPP;
1126
7850f63f 1127 if (copy_from_user(&user_size,
a5b6ee29 1128 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1129 sizeof(user_size)))
a5b6ee29
BH		 1130 return -EFAULT;
1131
7850f63f
BH		 1132 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1133 &dev_size, sizeof(dev_size)))
1134 return -EFAULT;
1135
1136 /* If the user buffer size is 0, this is just a query for the
1137 * device table size. Otherwise, if it's smaller than the
1138 * device table size it's an error.
1139 */
1140 if (user_size < dev_size)
1141 return user_size == 0 ? 0 : -EINVAL;
1142
1143 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1144 if (!indir)
1145 return -ENOMEM;
1146
892311f6 1147 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
a5b6ee29
BH		 1148 if (ret)
1149 goto out;
1150
7850f63f
BH		 1151 if (copy_to_user(useraddr +
1152 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1153 indir, dev_size * sizeof(indir[0])))
a5b6ee29
BH		 1154 ret = -EFAULT;
1155
1156out:
1157 kfree(indir);
1158 return ret;
1159}
1160
1161static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1162 void __user *useraddr)
1163{
7850f63f
BH		 1164 struct ethtool_rxnfc rx_rings;
1165 u32 user_size, dev_size, i;
1166 u32 *indir;
c03a14e8 1167 const struct ethtool_ops *ops = dev->ethtool_ops;
a5b6ee29 1168 int ret;
3de0b592 1169 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
a5b6ee29 1170
fe62d001 1171 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
c03a14e8 1172 !ops->get_rxnfc)
7850f63f 1173 return -EOPNOTSUPP;
c03a14e8
JP		 1174
1175 dev_size = ops->get_rxfh_indir_size(dev);
7850f63f 1176 if (dev_size == 0)
a5b6ee29
BH		 1177 return -EOPNOTSUPP;
1178
7850f63f 1179 if (copy_from_user(&user_size,
a5b6ee29 1180 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1181 sizeof(user_size)))
a5b6ee29
BH		 1182 return -EFAULT;
1183
278bc429 1184 if (user_size != 0 && user_size != dev_size)
7850f63f
BH		 1185 return -EINVAL;
1186
1187 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1188 if (!indir)
1189 return -ENOMEM;
1190
7850f63f 1191 rx_rings.cmd = ETHTOOL_GRXRINGS;
c03a14e8 1192 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
7850f63f
BH		 1193 if (ret)
1194 goto out;
278bc429
BH		 1195
1196 if (user_size == 0) {
1197 for (i = 0; i < dev_size; i++)
1198 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1199 } else {
3de0b592
VD		 1200 ret = ethtool_copy_validate_indir(indir,
1201 useraddr + ringidx_offset,
1202 &rx_rings,
1203 dev_size);
1204 if (ret)
1205 goto out;
1206 }
1207
892311f6 1208 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
d4ab4286
KJ		 1209 if (ret)
1210 goto out;
1211
1212 /* indicate whether rxfh was set to default */
1213 if (user_size == 0)
1214 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1215 else
1216 dev->priv_flags |= IFF_RXFH_CONFIGURED;
3de0b592
VD		 1217
1218out:
1219 kfree(indir);
1220 return ret;
1221}
1222
1223static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1224 void __user *useraddr)
1225{
1226 int ret;
1227 const struct ethtool_ops *ops = dev->ethtool_ops;
f062a384 1228 u32 user_indir_size, user_key_size;
3de0b592 1229 u32 dev_indir_size = 0, dev_key_size = 0;
f062a384 1230 struct ethtool_rxfh rxfh;
3de0b592 1231 u32 total_size;
f062a384 1232 u32 indir_bytes;
3de0b592 1233 u32 *indir = NULL;
892311f6 1234 u8 dev_hfunc = 0;
3de0b592
VD		 1235 u8 *hkey = NULL;
1236 u8 *rss_config;
1237
892311f6 1238 if (!ops->get_rxfh)
3de0b592
VD		 1239 return -EOPNOTSUPP;
1240
1241 if (ops->get_rxfh_indir_size)
1242 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592
VD		 1243 if (ops->get_rxfh_key_size)
1244 dev_key_size = ops->get_rxfh_key_size(dev);
1245
f062a384 1246 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592 1247 return -EFAULT;
f062a384
BH		 1248 user_indir_size = rxfh.indir_size;
1249 user_key_size = rxfh.key_size;
3de0b592 1250
f062a384 1251 /* Check that reserved fields are 0 for now */
892311f6
EP		 1252 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1253 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1254 return -EINVAL;
1255
1256 rxfh.indir_size = dev_indir_size;
1257 rxfh.key_size = dev_key_size;
1258 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
3de0b592
VD		 1259 return -EFAULT;
1260
3de0b592
VD		 1261 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1262 (user_key_size && (user_key_size != dev_key_size)))
1263 return -EINVAL;
1264
1265 indir_bytes = user_indir_size * sizeof(indir[0]);
1266 total_size = indir_bytes + user_key_size;
1267 rss_config = kzalloc(total_size, GFP_USER);
1268 if (!rss_config)
1269 return -ENOMEM;
1270
1271 if (user_indir_size)
1272 indir = (u32 *)rss_config;
1273
1274 if (user_key_size)
1275 hkey = rss_config + indir_bytes;
1276
892311f6
EP		 1277 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1278 if (ret)
1279 goto out;
3de0b592 1280
892311f6
EP		 1281 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1282 &dev_hfunc, sizeof(rxfh.hfunc))) {
1283 ret = -EFAULT;
1284 } else if (copy_to_user(useraddr +
1285 offsetof(struct ethtool_rxfh, rss_config[0]),
1286 rss_config, total_size)) {
1287 ret = -EFAULT;
1288 }
1289out:
3de0b592
VD		 1290 kfree(rss_config);
1291
1292 return ret;
1293}
1294
1295static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1296 void __user *useraddr)
1297{
1298 int ret;
1299 const struct ethtool_ops *ops = dev->ethtool_ops;
1300 struct ethtool_rxnfc rx_rings;
f062a384
BH		 1301 struct ethtool_rxfh rxfh;
1302 u32 dev_indir_size = 0, dev_key_size = 0, i;
3de0b592
VD		 1303 u32 *indir = NULL, indir_bytes = 0;
1304 u8 *hkey = NULL;
1305 u8 *rss_config;
3de0b592
VD		 1306 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1307
892311f6 1308 if (!ops->get_rxnfc || !ops->set_rxfh)
3de0b592
VD		 1309 return -EOPNOTSUPP;
1310
1311 if (ops->get_rxfh_indir_size)
1312 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592 1313 if (ops->get_rxfh_key_size)
d340c862 1314 dev_key_size = ops->get_rxfh_key_size(dev);
3de0b592 1315
f062a384 1316 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592
VD		 1317 return -EFAULT;
1318
f062a384 1319 /* Check that reserved fields are 0 for now */
892311f6
EP		 1320 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1321 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1322 return -EINVAL;
1323
892311f6
EP		 1324 /* If either indir, hash key or function is valid, proceed further.
1325 * Must request at least one change: indir size, hash key or function.
3de0b592 1326 */
f062a384
BH		 1327 if ((rxfh.indir_size &&
1328 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1329 rxfh.indir_size != dev_indir_size) ||
1330 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1331 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
892311f6 1332 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
3de0b592
VD		 1333 return -EINVAL;
1334
f062a384 1335 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
3de0b592
VD		 1336 indir_bytes = dev_indir_size * sizeof(indir[0]);
1337
f062a384 1338 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
3de0b592
VD		 1339 if (!rss_config)
1340 return -ENOMEM;
1341
1342 rx_rings.cmd = ETHTOOL_GRXRINGS;
1343 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1344 if (ret)
1345 goto out;
1346
f062a384
BH		 1347 /* rxfh.indir_size == 0 means reset the indir table to default.
1348 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
3de0b592 1349 */
f062a384
BH		 1350 if (rxfh.indir_size &&
1351 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
3de0b592
VD		 1352 indir = (u32 *)rss_config;
1353 ret = ethtool_copy_validate_indir(indir,
1354 useraddr + rss_cfg_offset,
1355 &rx_rings,
f062a384 1356 rxfh.indir_size);
3de0b592 1357 if (ret)
7850f63f 1358 goto out;
f062a384 1359 } else if (rxfh.indir_size == 0) {
3de0b592
VD		 1360 indir = (u32 *)rss_config;
1361 for (i = 0; i < dev_indir_size; i++)
1362 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1363 }
278bc429 1364
f062a384 1365 if (rxfh.key_size) {
3de0b592
VD		 1366 hkey = rss_config + indir_bytes;
1367 if (copy_from_user(hkey,
1368 useraddr + rss_cfg_offset + indir_bytes,
f062a384 1369 rxfh.key_size)) {
3de0b592
VD		 1370 ret = -EFAULT;
1371 goto out;
278bc429 1372 }
7850f63f
BH		 1373 }
1374
892311f6 1375 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
d4ab4286
KJ		 1376 if (ret)
1377 goto out;
1378
1379 /* indicate whether rxfh was set to default */
1380 if (rxfh.indir_size == 0)
1381 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1382 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1383 dev->priv_flags |= IFF_RXFH_CONFIGURED;
a5b6ee29
BH		 1384
1385out:
3de0b592 1386 kfree(rss_config);
a5b6ee29
BH		 1387 return ret;
1388}
1389
1da177e4
LT		 1390static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1391{
1392 struct ethtool_regs regs;
76fd8593 1393 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 1394 void *regbuf;
1395 int reglen, ret;
1396
1397 if (!ops->get_regs || !ops->get_regs_len)
1398 return -EOPNOTSUPP;
1399
1400 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1401 return -EFAULT;
1402
1403 reglen = ops->get_regs_len(dev);
1404 if (regs.len > reglen)
1405 regs.len = reglen;
1406
3808d348
SG		 1407 regbuf = NULL;
1408 if (reglen) {
1409 regbuf = vzalloc(reglen);
1410 if (!regbuf)
1411 return -ENOMEM;
1412 }
1da177e4
LT		 1413
1414 ops->get_regs(dev, &regs, regbuf);
1415
1416 ret = -EFAULT;
1417 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1418 goto out;
1419 useraddr += offsetof(struct ethtool_regs, data);
67ae7cf1 1420 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1da177e4
LT		 1421 goto out;
1422 ret = 0;
1423
1424 out:
a77f5db3 1425 vfree(regbuf);
1da177e4
LT		 1426 return ret;
1427}
1428
d73d3a8c
BH		 1429static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1430{
1431 struct ethtool_value reset;
1432 int ret;
1433
1434 if (!dev->ethtool_ops->reset)
1435 return -EOPNOTSUPP;
1436
1437 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1438 return -EFAULT;
1439
1440 ret = dev->ethtool_ops->reset(dev, &reset.data);
1441 if (ret)
1442 return ret;
1443
1444 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1445 return -EFAULT;
1446 return 0;
1447}
1448
1da177e4
LT		 1449static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1450{
8e557421 1451 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1da177e4
LT		 1452
1453 if (!dev->ethtool_ops->get_wol)
1454 return -EOPNOTSUPP;
1455
1456 dev->ethtool_ops->get_wol(dev, &wol);
1457
1458 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1459 return -EFAULT;
1460 return 0;
1461}
1462
1463static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1464{
1465 struct ethtool_wolinfo wol;
1466
1467 if (!dev->ethtool_ops->set_wol)
1468 return -EOPNOTSUPP;
1469
1470 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1471 return -EFAULT;
1472
1473 return dev->ethtool_ops->set_wol(dev, &wol);
1474}
1475
80f12ecc
YM		 1476static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1477{
1478 struct ethtool_eee edata;
1479 int rc;
1480
1481 if (!dev->ethtool_ops->get_eee)
1482 return -EOPNOTSUPP;
1483
1484 memset(&edata, 0, sizeof(struct ethtool_eee));
1485 edata.cmd = ETHTOOL_GEEE;
1486 rc = dev->ethtool_ops->get_eee(dev, &edata);
1487
1488 if (rc)
1489 return rc;
1490
1491 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1492 return -EFAULT;
1493
1494 return 0;
1495}
1496
1497static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1498{
1499 struct ethtool_eee edata;
1500
1501 if (!dev->ethtool_ops->set_eee)
1502 return -EOPNOTSUPP;
1503
1504 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1505 return -EFAULT;
1506
1507 return dev->ethtool_ops->set_eee(dev, &edata);
1508}
1509
1da177e4
LT		 1510static int ethtool_nway_reset(struct net_device *dev)
1511{
1512 if (!dev->ethtool_ops->nway_reset)
1513 return -EOPNOTSUPP;
1514
1515 return dev->ethtool_ops->nway_reset(dev);
1516}
1517
e596e6e4
BH		 1518static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1519{
1520 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1521
1522 if (!dev->ethtool_ops->get_link)
1523 return -EOPNOTSUPP;
1524
1525 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1526
1527 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1528 return -EFAULT;
1529 return 0;
1530}
1531
081d094e
BH		 1532static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1533 int (*getter)(struct net_device *,
1534 struct ethtool_eeprom *, u8 *),
1535 u32 total_len)
1da177e4
LT		 1536{
1537 struct ethtool_eeprom eeprom;
b131dd5d
MSB		 1538 void __user *userbuf = useraddr + sizeof(eeprom);
1539 u32 bytes_remaining;
1da177e4 1540 u8 *data;
b131dd5d 1541 int ret = 0;
1da177e4 1542
1da177e4
LT		 1543 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1544 return -EFAULT;
1545
1546 /* Check for wrap and zero */
1547 if (eeprom.offset + eeprom.len <= eeprom.offset)
1548 return -EINVAL;
1549
1550 /* Check for exceeding total eeprom len */
081d094e 1551 if (eeprom.offset + eeprom.len > total_len)
1da177e4
LT		 1552 return -EINVAL;
1553
b131dd5d 1554 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1555 if (!data)
1556 return -ENOMEM;
1557
b131dd5d
MSB		 1558 bytes_remaining = eeprom.len;
1559 while (bytes_remaining > 0) {
1560 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1561
081d094e 1562 ret = getter(dev, &eeprom, data);
b131dd5d
MSB		 1563 if (ret)
1564 break;
1565 if (copy_to_user(userbuf, data, eeprom.len)) {
1566 ret = -EFAULT;
1567 break;
1568 }
1569 userbuf += eeprom.len;
1570 eeprom.offset += eeprom.len;
1571 bytes_remaining -= eeprom.len;
1572 }
1da177e4 1573
c5835df9
MSB		 1574 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1575 eeprom.offset -= eeprom.len;
1576 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1577 ret = -EFAULT;
1578
1da177e4
LT		 1579 kfree(data);
1580 return ret;
1581}
1582
081d094e
BH		 1583static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1584{
1585 const struct ethtool_ops *ops = dev->ethtool_ops;
1586
e0fb6fb6
GR		 1587 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1588 !ops->get_eeprom_len(dev))
081d094e
BH		 1589 return -EOPNOTSUPP;
1590
1591 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1592 ops->get_eeprom_len(dev));
1593}
1594
1da177e4
LT		 1595static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1596{
1597 struct ethtool_eeprom eeprom;
76fd8593 1598 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 1599 void __user *userbuf = useraddr + sizeof(eeprom);
1600 u32 bytes_remaining;
1da177e4 1601 u8 *data;
b131dd5d 1602 int ret = 0;
1da177e4 1603
e0fb6fb6
GR		 1604 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1605 !ops->get_eeprom_len(dev))
1da177e4
LT		 1606 return -EOPNOTSUPP;
1607
1608 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1609 return -EFAULT;
1610
1611 /* Check for wrap and zero */
1612 if (eeprom.offset + eeprom.len <= eeprom.offset)
1613 return -EINVAL;
1614
1615 /* Check for exceeding total eeprom len */
1616 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1617 return -EINVAL;
1618
b131dd5d 1619 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1620 if (!data)
1621 return -ENOMEM;
1622
b131dd5d
MSB		 1623 bytes_remaining = eeprom.len;
1624 while (bytes_remaining > 0) {
1625 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1626
1627 if (copy_from_user(data, userbuf, eeprom.len)) {
1628 ret = -EFAULT;
1629 break;
1630 }
1631 ret = ops->set_eeprom(dev, &eeprom, data);
1632 if (ret)
1633 break;
1634 userbuf += eeprom.len;
1635 eeprom.offset += eeprom.len;
1636 bytes_remaining -= eeprom.len;
1637 }
1da177e4 1638
1da177e4
LT		 1639 kfree(data);
1640 return ret;
1641}
1642
97f8aefb 1643static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1644 void __user *useraddr)
1da177e4 1645{
8e557421 1646 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1da177e4
LT		 1647
1648 if (!dev->ethtool_ops->get_coalesce)
1649 return -EOPNOTSUPP;
1650
1651 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1652
1653 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1654 return -EFAULT;
1655 return 0;
1656}
1657
97f8aefb 1658static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1659 void __user *useraddr)
1da177e4
LT		 1660{
1661 struct ethtool_coalesce coalesce;
1662
fa04ae5c 1663 if (!dev->ethtool_ops->set_coalesce)
1da177e4
LT		 1664 return -EOPNOTSUPP;
1665
1666 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1667 return -EFAULT;
1668
1669 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1670}
1671
1672static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1673{
8e557421 1674 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1da177e4
LT		 1675
1676 if (!dev->ethtool_ops->get_ringparam)
1677 return -EOPNOTSUPP;
1678
1679 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1680
1681 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1682 return -EFAULT;
1683 return 0;
1684}
1685
1686static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1687{
1688 struct ethtool_ringparam ringparam;
1689
1690 if (!dev->ethtool_ops->set_ringparam)
1691 return -EOPNOTSUPP;
1692
1693 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1694 return -EFAULT;
1695
1696 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1697}
1698
8b5933c3 1699static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1700 void __user *useraddr)
1701{
1702 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1703
1704 if (!dev->ethtool_ops->get_channels)
1705 return -EOPNOTSUPP;
1706
1707 dev->ethtool_ops->get_channels(dev, &channels);
1708
1709 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1710 return -EFAULT;
1711 return 0;
1712}
1713
1714static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1715 void __user *useraddr)
1716{
31a86d13 1717 struct ethtool_channels channels, max = { .cmd = ETHTOOL_GCHANNELS };
d4ab4286 1718 u32 max_rx_in_use = 0;
8b5933c3 1719
8bf36862 1720 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
8b5933c3 1721 return -EOPNOTSUPP;
1722
1723 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1724 return -EFAULT;
1725
8bf36862
KJ		 1726 dev->ethtool_ops->get_channels(dev, &max);
1727
1728 /* ensure new counts are within the maximums */
1729 if ((channels.rx_count > max.max_rx) ||
1730 (channels.tx_count > max.max_tx) ||
1731 (channels.combined_count > max.max_combined) ||
1732 (channels.other_count > max.max_other))
1733 return -EINVAL;
1734
d4ab4286
KJ		 1735 /* ensure the new Rx count fits within the configured Rx flow
1736 * indirection table settings */
1737 if (netif_is_rxfh_configured(dev) &&
1738 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1739 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1740 return -EINVAL;
1741
8b5933c3 1742 return dev->ethtool_ops->set_channels(dev, &channels);
1743}
1744
1da177e4
LT		 1745static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1746{
1747 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1748
1749 if (!dev->ethtool_ops->get_pauseparam)
1750 return -EOPNOTSUPP;
1751
1752 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1753
1754 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1755 return -EFAULT;
1756 return 0;
1757}
1758
1759static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1760{
1761 struct ethtool_pauseparam pauseparam;
1762
e1b90c41 1763 if (!dev->ethtool_ops->set_pauseparam)
1da177e4
LT		 1764 return -EOPNOTSUPP;
1765
1766 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1767 return -EFAULT;
1768
1769 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1770}
1771
1da177e4
LT		 1772static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1773{
1774 struct ethtool_test test;
76fd8593 1775 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1776 u64 *data;
ff03d49f 1777 int ret, test_len;
1da177e4 1778
a9828ec6 1779 if (!ops->self_test || !ops->get_sset_count)
1da177e4
LT		 1780 return -EOPNOTSUPP;
1781
a9828ec6 1782 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
ff03d49f
JG		 1783 if (test_len < 0)
1784 return test_len;
1785 WARN_ON(test_len == 0);
1786
1da177e4
LT		 1787 if (copy_from_user(&test, useraddr, sizeof(test)))
1788 return -EFAULT;
1789
ff03d49f
JG		 1790 test.len = test_len;
1791 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1da177e4
LT		 1792 if (!data)
1793 return -ENOMEM;
1794
1795 ops->self_test(dev, &test, data);
1796
1797 ret = -EFAULT;
1798 if (copy_to_user(useraddr, &test, sizeof(test)))
1799 goto out;
1800 useraddr += sizeof(test);
1801 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1802 goto out;
1803 ret = 0;
1804
1805 out:
1806 kfree(data);
1807 return ret;
1808}
1809
1810static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1811{
1812 struct ethtool_gstrings gstrings;
1da177e4
LT		 1813 u8 *data;
1814 int ret;
1815
1da177e4
LT		 1816 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1817 return -EFAULT;
1818
340ae165 1819 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
a9828ec6
BH		 1820 if (ret < 0)
1821 return ret;
4d1ceea8
AS		 1822 if (ret > S32_MAX / ETH_GSTRING_LEN)
1823 return -ENOMEM;
1824 WARN_ON_ONCE(!ret);
a9828ec6
BH		 1825
1826 gstrings.len = ret;
4d1ceea8
AS		 1827 data = vzalloc(gstrings.len * ETH_GSTRING_LEN);
1828 if (gstrings.len && !data)
1da177e4
LT		 1829 return -ENOMEM;
1830
340ae165 1831 __ethtool_get_strings(dev, gstrings.string_set, data);
1da177e4
LT		 1832
1833 ret = -EFAULT;
1834 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1835 goto out;
1836 useraddr += sizeof(gstrings);
4d1ceea8
AS		 1837 if (gstrings.len &&
1838 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1da177e4
LT		 1839 goto out;
1840 ret = 0;
1841
340ae165 1842out:
4d1ceea8 1843 vfree(data);
1da177e4
LT		 1844 return ret;
1845}
1846
1847static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1848{
1849 struct ethtool_value id;
68f512f2 1850 static bool busy;
c03a14e8 1851 const struct ethtool_ops *ops = dev->ethtool_ops;
68f512f2 1852 int rc;
1da177e4 1853
c03a14e8 1854 if (!ops->set_phys_id)
1da177e4
LT		 1855 return -EOPNOTSUPP;
1856
68f512f2
BH		 1857 if (busy)
1858 return -EBUSY;
1859
1da177e4
LT		 1860 if (copy_from_user(&id, useraddr, sizeof(id)))
1861 return -EFAULT;
1862
c03a14e8 1863 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
fce55922 1864 if (rc < 0)
68f512f2
BH		 1865 return rc;
1866
1867 /* Drop the RTNL lock while waiting, but prevent reentry or
1868 * removal of the device.
1869 */
1870 busy = true;
1871 dev_hold(dev);
1872 rtnl_unlock();
1873
1874 if (rc == 0) {
1875 /* Driver will handle this itself */
1876 schedule_timeout_interruptible(
143780c6 1877 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
68f512f2 1878 } else {
fce55922
AB		 1879 /* Driver expects to be called at twice the frequency in rc */
1880 int n = rc * 2, i, interval = HZ / n;
1881
1882 /* Count down seconds */
68f512f2 1883 do {
fce55922
AB		 1884 /* Count down iterations per second */
1885 i = n;
1886 do {
1887 rtnl_lock();
c03a14e8 1888 rc = ops->set_phys_id(dev,
fce55922
AB		 1889 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1890 rtnl_unlock();
1891 if (rc)
1892 break;
1893 schedule_timeout_interruptible(interval);
1894 } while (!signal_pending(current) && --i != 0);
68f512f2
BH		 1895 } while (!signal_pending(current) &&
1896 (id.data == 0 || --id.data != 0));
1897 }
1898
1899 rtnl_lock();
1900 dev_put(dev);
1901 busy = false;
1902
c03a14e8 1903 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
68f512f2 1904 return rc;
1da177e4
LT		 1905}
1906
1907static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1908{
1909 struct ethtool_stats stats;
76fd8593 1910 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1911 u64 *data;
ff03d49f 1912 int ret, n_stats;
1da177e4 1913
a9828ec6 1914 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1da177e4
LT		 1915 return -EOPNOTSUPP;
1916
a9828ec6 1917 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
ff03d49f
JG		 1918 if (n_stats < 0)
1919 return n_stats;
4d1ceea8
AS		 1920 if (n_stats > S32_MAX / sizeof(u64))
1921 return -ENOMEM;
1922 WARN_ON_ONCE(!n_stats);
1da177e4
LT		 1923 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1924 return -EFAULT;
1925
ff03d49f 1926 stats.n_stats = n_stats;
4d1ceea8
AS		 1927 data = vzalloc(n_stats * sizeof(u64));
1928 if (n_stats && !data)
1da177e4
LT		 1929 return -ENOMEM;
1930
1931 ops->get_ethtool_stats(dev, &stats, data);
1932
1933 ret = -EFAULT;
1934 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1935 goto out;
1936 useraddr += sizeof(stats);
4d1ceea8 1937 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1da177e4
LT		 1938 goto out;
1939 ret = 0;
1940
1941 out:
4d1ceea8 1942 vfree(data);
1da177e4
LT		 1943 return ret;
1944}
1945
f3a40945
AL		 1946static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1947{
1948 struct ethtool_stats stats;
1949 struct phy_device *phydev = dev->phydev;
1950 u64 *data;
1951 int ret, n_stats;
1952
1953 if (!phydev)
1954 return -EOPNOTSUPP;
1955
1956 n_stats = phy_get_sset_count(phydev);
f3a40945
AL		 1957 if (n_stats < 0)
1958 return n_stats;
4d1ceea8
AS		 1959 if (n_stats > S32_MAX / sizeof(u64))
1960 return -ENOMEM;
1961 WARN_ON_ONCE(!n_stats);
f3a40945
AL		 1962
1963 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1964 return -EFAULT;
1965
1966 stats.n_stats = n_stats;
4d1ceea8
AS		 1967 data = vzalloc(n_stats * sizeof(u64));
1968 if (n_stats && !data)
f3a40945
AL		 1969 return -ENOMEM;
1970
1971 mutex_lock(&phydev->lock);
1972 phydev->drv->get_stats(phydev, &stats, data);
1973 mutex_unlock(&phydev->lock);
1974
1975 ret = -EFAULT;
1976 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1977 goto out;
1978 useraddr += sizeof(stats);
4d1ceea8 1979 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
f3a40945
AL		 1980 goto out;
1981 ret = 0;
1982
1983 out:
4d1ceea8 1984 vfree(data);
f3a40945
AL		 1985 return ret;
1986}
1987
0bf0519d 1988static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
a6f9a705
JW		 1989{
1990 struct ethtool_perm_addr epaddr;
a6f9a705 1991
313674af 1992 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
a6f9a705
JW		 1993 return -EFAULT;
1994
313674af
MW		 1995 if (epaddr.size < dev->addr_len)
1996 return -ETOOSMALL;
1997 epaddr.size = dev->addr_len;
a6f9a705 1998
a6f9a705 1999 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
313674af 2000 return -EFAULT;
a6f9a705 2001 useraddr += sizeof(epaddr);
313674af
MW		 2002 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2003 return -EFAULT;
2004 return 0;
a6f9a705
JW		 2005}
2006
13c99b24
JG		 2007static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2008 u32 cmd, u32 (*actor)(struct net_device *))
3ae7c0b2 2009{
8e557421 2010 struct ethtool_value edata = { .cmd = cmd };
3ae7c0b2 2011
13c99b24 2012 if (!actor)
3ae7c0b2
JG		 2013 return -EOPNOTSUPP;
2014
13c99b24 2015 edata.data = actor(dev);
3ae7c0b2
JG		 2016
2017 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2018 return -EFAULT;
2019 return 0;
2020}
2021
13c99b24
JG		 2022static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2023 void (*actor)(struct net_device *, u32))
3ae7c0b2
JG		 2024{
2025 struct ethtool_value edata;
2026
13c99b24 2027 if (!actor)
3ae7c0b2
JG		 2028 return -EOPNOTSUPP;
2029
2030 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2031 return -EFAULT;
2032
13c99b24 2033 actor(dev, edata.data);
339bf024
JG		 2034 return 0;
2035}
2036
13c99b24
JG		 2037static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2038 int (*actor)(struct net_device *, u32))
339bf024
JG		 2039{
2040 struct ethtool_value edata;
2041
13c99b24 2042 if (!actor)
339bf024
JG		 2043 return -EOPNOTSUPP;
2044
2045 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2046 return -EFAULT;
2047
13c99b24 2048 return actor(dev, edata.data);
339bf024
JG		 2049}
2050
97f8aefb 2051static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2052 char __user *useraddr)
05c6a8d7
AK		 2053{
2054 struct ethtool_flash efl;
2055
2056 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2057 return -EFAULT;
2058
2059 if (!dev->ethtool_ops->flash_device)
2060 return -EOPNOTSUPP;
2061
786f5281
BH		 2062 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2063
05c6a8d7
AK		 2064 return dev->ethtool_ops->flash_device(dev, &efl);
2065}
2066
29dd54b7
AC		 2067static int ethtool_set_dump(struct net_device *dev,
2068 void __user *useraddr)
2069{
2070 struct ethtool_dump dump;
2071
2072 if (!dev->ethtool_ops->set_dump)
2073 return -EOPNOTSUPP;
2074
2075 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2076 return -EFAULT;
2077
2078 return dev->ethtool_ops->set_dump(dev, &dump);
2079}
2080
2081static int ethtool_get_dump_flag(struct net_device *dev,
2082 void __user *useraddr)
2083{
2084 int ret;
2085 struct ethtool_dump dump;
2086 const struct ethtool_ops *ops = dev->ethtool_ops;
2087
c03a14e8 2088 if (!ops->get_dump_flag)
29dd54b7
AC		 2089 return -EOPNOTSUPP;
2090
2091 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2092 return -EFAULT;
2093
2094 ret = ops->get_dump_flag(dev, &dump);
2095 if (ret)
2096 return ret;
2097
2098 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2099 return -EFAULT;
2100 return 0;
2101}
2102
2103static int ethtool_get_dump_data(struct net_device *dev,
2104 void __user *useraddr)
2105{
2106 int ret;
2107 __u32 len;
2108 struct ethtool_dump dump, tmp;
2109 const struct ethtool_ops *ops = dev->ethtool_ops;
2110 void *data = NULL;
2111
c03a14e8 2112 if (!ops->get_dump_data || !ops->get_dump_flag)
29dd54b7
AC		 2113 return -EOPNOTSUPP;
2114
2115 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2116 return -EFAULT;
2117
2118 memset(&tmp, 0, sizeof(tmp));
2119 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2120 ret = ops->get_dump_flag(dev, &tmp);
2121 if (ret)
2122 return ret;
2123
c590b5e2 2124 len = min(tmp.len, dump.len);
29dd54b7
AC		 2125 if (!len)
2126 return -EFAULT;
2127
c590b5e2
MS		 2128 /* Don't ever let the driver think there's more space available
2129 * than it requested with .get_dump_flag().
2130 */
2131 dump.len = len;
2132
2133 /* Always allocate enough space to hold the whole thing so that the
2134 * driver does not need to check the length and bother with partial
2135 * dumping.
2136 */
29dd54b7
AC		 2137 data = vzalloc(tmp.len);
2138 if (!data)
2139 return -ENOMEM;
2140 ret = ops->get_dump_data(dev, &dump, data);
2141 if (ret)
2142 goto out;
2143
c590b5e2
MS		 2144 /* There are two sane possibilities:
2145 * 1. The driver's .get_dump_data() does not touch dump.len.
2146 * 2. Or it may set dump.len to how much it really writes, which
2147 * should be tmp.len (or len if it can do a partial dump).
2148 * In any case respond to userspace with the actual length of data
2149 * it's receiving.
2150 */
2151 WARN_ON(dump.len != len && dump.len != tmp.len);
2152 dump.len = len;
2153
29dd54b7
AC		 2154 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2155 ret = -EFAULT;
2156 goto out;
2157 }
2158 useraddr += offsetof(struct ethtool_dump, data);
2159 if (copy_to_user(useraddr, data, len))
2160 ret = -EFAULT;
2161out:
2162 vfree(data);
2163 return ret;
2164}
2165
c8f3a8c3
RC		 2166static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2167{
2168 int err = 0;
2169 struct ethtool_ts_info info;
2170 const struct ethtool_ops *ops = dev->ethtool_ops;
2171 struct phy_device *phydev = dev->phydev;
2172
2173 memset(&info, 0, sizeof(info));
2174 info.cmd = ETHTOOL_GET_TS_INFO;
2175
2176 if (phydev && phydev->drv && phydev->drv->ts_info) {
c8f3a8c3 2177 err = phydev->drv->ts_info(phydev, &info);
c03a14e8 2178 } else if (ops->get_ts_info) {
c8f3a8c3 2179 err = ops->get_ts_info(dev, &info);
c8f3a8c3
RC		 2180 } else {
2181 info.so_timestamping =
2182 SOF_TIMESTAMPING_RX_SOFTWARE |
2183 SOF_TIMESTAMPING_SOFTWARE;
2184 info.phc_index = -1;
2185 }
2186
2187 if (err)
2188 return err;
2189
2190 if (copy_to_user(useraddr, &info, sizeof(info)))
2191 err = -EFAULT;
2192
2193 return err;
2194}
2195
2f438366
ES		 2196static int __ethtool_get_module_info(struct net_device *dev,
2197 struct ethtool_modinfo *modinfo)
2198{
2199 const struct ethtool_ops *ops = dev->ethtool_ops;
2200 struct phy_device *phydev = dev->phydev;
2201
2202 if (phydev && phydev->drv && phydev->drv->module_info)
2203 return phydev->drv->module_info(phydev, modinfo);
2204
2205 if (ops->get_module_info)
2206 return ops->get_module_info(dev, modinfo);
2207
2208 return -EOPNOTSUPP;
2209}
2210
41c3cb6d
SH		 2211static int ethtool_get_module_info(struct net_device *dev,
2212 void __user *useraddr)
2213{
2214 int ret;
2215 struct ethtool_modinfo modinfo;
41c3cb6d
SH		 2216
2217 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2218 return -EFAULT;
2219
2f438366 2220 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2221 if (ret)
2222 return ret;
2223
2224 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2225 return -EFAULT;
2226
2227 return 0;
2228}
2229
2f438366
ES		 2230static int __ethtool_get_module_eeprom(struct net_device *dev,
2231 struct ethtool_eeprom *ee, u8 *data)
2232{
2233 const struct ethtool_ops *ops = dev->ethtool_ops;
2234 struct phy_device *phydev = dev->phydev;
2235
2236 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2237 return phydev->drv->module_eeprom(phydev, ee, data);
2238
2239 if (ops->get_module_eeprom)
2240 return ops->get_module_eeprom(dev, ee, data);
2241
2242 return -EOPNOTSUPP;
2243}
2244
41c3cb6d
SH		 2245static int ethtool_get_module_eeprom(struct net_device *dev,
2246 void __user *useraddr)
2247{
2248 int ret;
2249 struct ethtool_modinfo modinfo;
41c3cb6d 2250
2f438366 2251 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2252 if (ret)
2253 return ret;
2254
2f438366
ES		 2255 return ethtool_get_any_eeprom(dev, useraddr,
2256 __ethtool_get_module_eeprom,
41c3cb6d
SH		 2257 modinfo.eeprom_len);
2258}
2259
f0db9b07
GV		 2260static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2261{
2262 switch (tuna->id) {
2263 case ETHTOOL_RX_COPYBREAK:
1255a505 2264 case ETHTOOL_TX_COPYBREAK:
f0db9b07
GV		 2265 if (tuna->len != sizeof(u32) ||
2266 tuna->type_id != ETHTOOL_TUNABLE_U32)
2267 return -EINVAL;
2268 break;
2269 default:
2270 return -EINVAL;
2271 }
2272
2273 return 0;
2274}
2275
2276static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2277{
2278 int ret;
2279 struct ethtool_tunable tuna;
2280 const struct ethtool_ops *ops = dev->ethtool_ops;
2281 void *data;
2282
2283 if (!ops->get_tunable)
2284 return -EOPNOTSUPP;
2285 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2286 return -EFAULT;
2287 ret = ethtool_tunable_valid(&tuna);
2288 if (ret)
2289 return ret;
2290 data = kmalloc(tuna.len, GFP_USER);
2291 if (!data)
2292 return -ENOMEM;
2293 ret = ops->get_tunable(dev, &tuna, data);
2294 if (ret)
2295 goto out;
2296 useraddr += sizeof(tuna);
2297 ret = -EFAULT;
2298 if (copy_to_user(useraddr, data, tuna.len))
2299 goto out;
2300 ret = 0;
2301
2302out:
2303 kfree(data);
2304 return ret;
2305}
2306
2307static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2308{
2309 int ret;
2310 struct ethtool_tunable tuna;
2311 const struct ethtool_ops *ops = dev->ethtool_ops;
2312 void *data;
2313
2314 if (!ops->set_tunable)
2315 return -EOPNOTSUPP;
2316 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2317 return -EFAULT;
2318 ret = ethtool_tunable_valid(&tuna);
2319 if (ret)
2320 return ret;
2321 data = kmalloc(tuna.len, GFP_USER);
2322 if (!data)
2323 return -ENOMEM;
2324 useraddr += sizeof(tuna);
2325 ret = -EFAULT;
2326 if (copy_from_user(data, useraddr, tuna.len))
2327 goto out;
2328 ret = ops->set_tunable(dev, &tuna, data);
2329
2330out:
2331 kfree(data);
2332 return ret;
2333}
2334
421797b1
KL		 2335static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2336 void __user *useraddr,
2337 struct ethtool_per_queue_op *per_queue_opt)
2338{
2339 u32 bit;
2340 int ret;
2341 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2342
2343 if (!dev->ethtool_ops->get_per_queue_coalesce)
2344 return -EOPNOTSUPP;
2345
2346 useraddr += sizeof(*per_queue_opt);
2347
2348 bitmap_from_u32array(queue_mask,
2349 MAX_NUM_QUEUE,
2350 per_queue_opt->queue_mask,
2351 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2352
2353 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2354 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2355
2356 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2357 if (ret != 0)
2358 return ret;
2359 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2360 return -EFAULT;
2361 useraddr += sizeof(coalesce);
2362 }
2363
2364 return 0;
2365}
2366
f38d138a
KL		 2367static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2368 void __user *useraddr,
2369 struct ethtool_per_queue_op *per_queue_opt)
2370{
2371 u32 bit;
2372 int i, ret = 0;
2373 int n_queue;
2374 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2375 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2376
2377 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2378 (!dev->ethtool_ops->get_per_queue_coalesce))
2379 return -EOPNOTSUPP;
2380
2381 useraddr += sizeof(*per_queue_opt);
2382
2383 bitmap_from_u32array(queue_mask,
2384 MAX_NUM_QUEUE,
2385 per_queue_opt->queue_mask,
2386 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2387 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2388 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2389 if (!backup)
2390 return -ENOMEM;
2391
2392 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2393 struct ethtool_coalesce coalesce;
2394
2395 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2396 if (ret != 0)
2397 goto roll_back;
2398
2399 tmp++;
2400
2401 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2402 ret = -EFAULT;
2403 goto roll_back;
2404 }
2405
2406 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2407 if (ret != 0)
2408 goto roll_back;
2409
2410 useraddr += sizeof(coalesce);
2411 }
2412
2413roll_back:
2414 if (ret != 0) {
2415 tmp = backup;
2416 for_each_set_bit(i, queue_mask, bit) {
2417 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2418 tmp++;
2419 }
2420 }
2421 kfree(backup);
2422
2423 return ret;
2424}
2425
ac2c7ad0
KL		 2426static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2427{
2428 struct ethtool_per_queue_op per_queue_opt;
2429
2430 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2431 return -EFAULT;
2432
2433 switch (per_queue_opt.sub_command) {
421797b1
KL		 2434 case ETHTOOL_GCOALESCE:
2435 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
f38d138a
KL		 2436 case ETHTOOL_SCOALESCE:
2437 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
ac2c7ad0
KL		 2438 default:
2439 return -EOPNOTSUPP;
2440 };
2441}
2442
968ad9da
RL		 2443static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2444{
2445 switch (tuna->id) {
65feddd5
RL		 2446 case ETHTOOL_PHY_DOWNSHIFT:
2447 if (tuna->len != sizeof(u8) ||
2448 tuna->type_id != ETHTOOL_TUNABLE_U8)
2449 return -EINVAL;
2450 break;
968ad9da
RL		 2451 default:
2452 return -EINVAL;
2453 }
2454
2455 return 0;
2456}
2457
2458static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2459{
2460 int ret;
2461 struct ethtool_tunable tuna;
2462 struct phy_device *phydev = dev->phydev;
2463 void *data;
2464
2465 if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2466 return -EOPNOTSUPP;
2467
2468 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2469 return -EFAULT;
2470 ret = ethtool_phy_tunable_valid(&tuna);
2471 if (ret)
2472 return ret;
2473 data = kmalloc(tuna.len, GFP_USER);
2474 if (!data)
2475 return -ENOMEM;
4b65246b 2476 mutex_lock(&phydev->lock);
968ad9da 2477 ret = phydev->drv->get_tunable(phydev, &tuna, data);
4b65246b 2478 mutex_unlock(&phydev->lock);
968ad9da
RL		 2479 if (ret)
2480 goto out;
2481 useraddr += sizeof(tuna);
2482 ret = -EFAULT;
2483 if (copy_to_user(useraddr, data, tuna.len))
2484 goto out;
2485 ret = 0;
2486
2487out:
2488 kfree(data);
2489 return ret;
2490}
2491
2492static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2493{
2494 int ret;
2495 struct ethtool_tunable tuna;
2496 struct phy_device *phydev = dev->phydev;
2497 void *data;
2498
2499 if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2500 return -EOPNOTSUPP;
2501 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2502 return -EFAULT;
2503 ret = ethtool_phy_tunable_valid(&tuna);
2504 if (ret)
2505 return ret;
2506 data = kmalloc(tuna.len, GFP_USER);
2507 if (!data)
2508 return -ENOMEM;
2509 useraddr += sizeof(tuna);
2510 ret = -EFAULT;
2511 if (copy_from_user(data, useraddr, tuna.len))
2512 goto out;
4b65246b 2513 mutex_lock(&phydev->lock);
968ad9da 2514 ret = phydev->drv->set_tunable(phydev, &tuna, data);
4b65246b 2515 mutex_unlock(&phydev->lock);
968ad9da
RL		 2516
2517out:
2518 kfree(data);
2519 return ret;
2520}
2521
600fed5e 2522/* The main entry point in this file. Called from net/core/dev_ioctl.c */
1da177e4 2523
881d966b 2524int dev_ethtool(struct net *net, struct ifreq *ifr)
1da177e4 2525{
881d966b 2526 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1da177e4 2527 void __user *useraddr = ifr->ifr_data;
ac2c7ad0 2528 u32 ethcmd, sub_cmd;
1da177e4 2529 int rc;
b29d3145 2530 netdev_features_t old_features;
1da177e4 2531
1da177e4
LT		 2532 if (!dev || !netif_device_present(dev))
2533 return -ENODEV;
2534
97f8aefb 2535 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1da177e4
LT		 2536 return -EFAULT;
2537
ac2c7ad0
KL		 2538 if (ethcmd == ETHTOOL_PERQUEUE) {
2539 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2540 return -EFAULT;
2541 } else {
2542 sub_cmd = ethcmd;
2543 }
75f3123c 2544 /* Allow some commands to be done by anyone */
ac2c7ad0 2545 switch (sub_cmd) {
0fdc100b 2546 case ETHTOOL_GSET:
75f3123c 2547 case ETHTOOL_GDRVINFO:
75f3123c 2548 case ETHTOOL_GMSGLVL:
2da45db2 2549 case ETHTOOL_GLINK:
75f3123c
SH		 2550 case ETHTOOL_GCOALESCE:
2551 case ETHTOOL_GRINGPARAM:
2552 case ETHTOOL_GPAUSEPARAM:
2553 case ETHTOOL_GRXCSUM:
2554 case ETHTOOL_GTXCSUM:
2555 case ETHTOOL_GSG:
f80400a2 2556 case ETHTOOL_GSSET_INFO:
75f3123c 2557 case ETHTOOL_GSTRINGS:
2da45db2 2558 case ETHTOOL_GSTATS:
f3a40945 2559 case ETHTOOL_GPHYSTATS:
75f3123c
SH		 2560 case ETHTOOL_GTSO:
2561 case ETHTOOL_GPERMADDR:
2562 case ETHTOOL_GUFO:
2563 case ETHTOOL_GGSO:
1cab819b 2564 case ETHTOOL_GGRO:
339bf024
JG		 2565 case ETHTOOL_GFLAGS:
2566 case ETHTOOL_GPFLAGS:
0853ad66 2567 case ETHTOOL_GRXFH:
59089d8d
SB		 2568 case ETHTOOL_GRXRINGS:
2569 case ETHTOOL_GRXCLSRLCNT:
2570 case ETHTOOL_GRXCLSRULE:
2571 case ETHTOOL_GRXCLSRLALL:
2da45db2 2572 case ETHTOOL_GRXFHINDIR:
3de0b592 2573 case ETHTOOL_GRSSH:
5455c699 2574 case ETHTOOL_GFEATURES:
2da45db2 2575 case ETHTOOL_GCHANNELS:
c8f3a8c3 2576 case ETHTOOL_GET_TS_INFO:
2da45db2 2577 case ETHTOOL_GEEE:
f0db9b07 2578 case ETHTOOL_GTUNABLE:
968ad9da 2579 case ETHTOOL_PHY_GTUNABLE:
8006f6bf 2580 case ETHTOOL_GLINKSETTINGS:
75f3123c
SH		 2581 break;
2582 default:
5e1fccc0 2583 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
75f3123c
SH		 2584 return -EPERM;
2585 }
2586
97f8aefb 2587 if (dev->ethtool_ops->begin) {
2588 rc = dev->ethtool_ops->begin(dev);
2589 if (rc < 0)
1da177e4 2590 return rc;
97f8aefb 2591 }
d8a33ac4
SH		 2592 old_features = dev->features;
2593
1da177e4
LT		 2594 switch (ethcmd) {
2595 case ETHTOOL_GSET:
2596 rc = ethtool_get_settings(dev, useraddr);
2597 break;
2598 case ETHTOOL_SSET:
2599 rc = ethtool_set_settings(dev, useraddr);
2600 break;
2601 case ETHTOOL_GDRVINFO:
2602 rc = ethtool_get_drvinfo(dev, useraddr);
1da177e4
LT		 2603 break;
2604 case ETHTOOL_GREGS:
2605 rc = ethtool_get_regs(dev, useraddr);
2606 break;
2607 case ETHTOOL_GWOL:
2608 rc = ethtool_get_wol(dev, useraddr);
2609 break;
2610 case ETHTOOL_SWOL:
2611 rc = ethtool_set_wol(dev, useraddr);
2612 break;
2613 case ETHTOOL_GMSGLVL:
13c99b24
JG		 2614 rc = ethtool_get_value(dev, useraddr, ethcmd,
2615 dev->ethtool_ops->get_msglevel);
1da177e4
LT		 2616 break;
2617 case ETHTOOL_SMSGLVL:
13c99b24
JG		 2618 rc = ethtool_set_value_void(dev, useraddr,
2619 dev->ethtool_ops->set_msglevel);
1da177e4 2620 break;
80f12ecc
YM		 2621 case ETHTOOL_GEEE:
2622 rc = ethtool_get_eee(dev, useraddr);
2623 break;
2624 case ETHTOOL_SEEE:
2625 rc = ethtool_set_eee(dev, useraddr);
2626 break;
1da177e4
LT		 2627 case ETHTOOL_NWAY_RST:
2628 rc = ethtool_nway_reset(dev);
2629 break;
2630 case ETHTOOL_GLINK:
e596e6e4 2631 rc = ethtool_get_link(dev, useraddr);
1da177e4
LT		 2632 break;
2633 case ETHTOOL_GEEPROM:
2634 rc = ethtool_get_eeprom(dev, useraddr);
2635 break;
2636 case ETHTOOL_SEEPROM:
2637 rc = ethtool_set_eeprom(dev, useraddr);
2638 break;
2639 case ETHTOOL_GCOALESCE:
2640 rc = ethtool_get_coalesce(dev, useraddr);
2641 break;
2642 case ETHTOOL_SCOALESCE:
2643 rc = ethtool_set_coalesce(dev, useraddr);
2644 break;
2645 case ETHTOOL_GRINGPARAM:
2646 rc = ethtool_get_ringparam(dev, useraddr);
2647 break;
2648 case ETHTOOL_SRINGPARAM:
2649 rc = ethtool_set_ringparam(dev, useraddr);
2650 break;
2651 case ETHTOOL_GPAUSEPARAM:
2652 rc = ethtool_get_pauseparam(dev, useraddr);
2653 break;
2654 case ETHTOOL_SPAUSEPARAM:
2655 rc = ethtool_set_pauseparam(dev, useraddr);
2656 break;
1da177e4
LT		 2657 case ETHTOOL_TEST:
2658 rc = ethtool_self_test(dev, useraddr);
2659 break;
2660 case ETHTOOL_GSTRINGS:
2661 rc = ethtool_get_strings(dev, useraddr);
2662 break;
2663 case ETHTOOL_PHYS_ID:
2664 rc = ethtool_phys_id(dev, useraddr);
2665 break;
2666 case ETHTOOL_GSTATS:
2667 rc = ethtool_get_stats(dev, useraddr);
2668 break;
a6f9a705
JW		 2669 case ETHTOOL_GPERMADDR:
2670 rc = ethtool_get_perm_addr(dev, useraddr);
2671 break;
3ae7c0b2 2672 case ETHTOOL_GFLAGS:
13c99b24 2673 rc = ethtool_get_value(dev, useraddr, ethcmd,
bc5787c6 2674 __ethtool_get_flags);
3ae7c0b2
JG		 2675 break;
2676 case ETHTOOL_SFLAGS:
da8ac86c 2677 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3ae7c0b2 2678 break;
339bf024 2679 case ETHTOOL_GPFLAGS:
13c99b24
JG		 2680 rc = ethtool_get_value(dev, useraddr, ethcmd,
2681 dev->ethtool_ops->get_priv_flags);
339bf024
JG		 2682 break;
2683 case ETHTOOL_SPFLAGS:
13c99b24
JG		 2684 rc = ethtool_set_value(dev, useraddr,
2685 dev->ethtool_ops->set_priv_flags);
339bf024 2686 break;
0853ad66 2687 case ETHTOOL_GRXFH:
59089d8d
SB		 2688 case ETHTOOL_GRXRINGS:
2689 case ETHTOOL_GRXCLSRLCNT:
2690 case ETHTOOL_GRXCLSRULE:
2691 case ETHTOOL_GRXCLSRLALL:
bf988435 2692 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
0853ad66
SB		 2693 break;
2694 case ETHTOOL_SRXFH:
59089d8d
SB		 2695 case ETHTOOL_SRXCLSRLDEL:
2696 case ETHTOOL_SRXCLSRLINS:
bf988435 2697 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
0853ad66 2698 break;
05c6a8d7
AK		 2699 case ETHTOOL_FLASHDEV:
2700 rc = ethtool_flash_device(dev, useraddr);
2701 break;
d73d3a8c
BH		 2702 case ETHTOOL_RESET:
2703 rc = ethtool_reset(dev, useraddr);
2704 break;
723b2f57
JG		 2705 case ETHTOOL_GSSET_INFO:
2706 rc = ethtool_get_sset_info(dev, useraddr);
2707 break;
a5b6ee29
BH		 2708 case ETHTOOL_GRXFHINDIR:
2709 rc = ethtool_get_rxfh_indir(dev, useraddr);
2710 break;
2711 case ETHTOOL_SRXFHINDIR:
2712 rc = ethtool_set_rxfh_indir(dev, useraddr);
2713 break;
3de0b592
VD		 2714 case ETHTOOL_GRSSH:
2715 rc = ethtool_get_rxfh(dev, useraddr);
2716 break;
2717 case ETHTOOL_SRSSH:
2718 rc = ethtool_set_rxfh(dev, useraddr);
2719 break;
5455c699
MM		 2720 case ETHTOOL_GFEATURES:
2721 rc = ethtool_get_features(dev, useraddr);
2722 break;
2723 case ETHTOOL_SFEATURES:
2724 rc = ethtool_set_features(dev, useraddr);
2725 break;
0a417704 2726 case ETHTOOL_GTXCSUM:
e83d360d 2727 case ETHTOOL_GRXCSUM:
0a417704
MM		 2728 case ETHTOOL_GSG:
2729 case ETHTOOL_GTSO:
2730 case ETHTOOL_GUFO:
2731 case ETHTOOL_GGSO:
2732 case ETHTOOL_GGRO:
2733 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2734 break;
2735 case ETHTOOL_STXCSUM:
e83d360d 2736 case ETHTOOL_SRXCSUM:
0a417704
MM		 2737 case ETHTOOL_SSG:
2738 case ETHTOOL_STSO:
2739 case ETHTOOL_SUFO:
2740 case ETHTOOL_SGSO:
2741 case ETHTOOL_SGRO:
2742 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2743 break;
8b5933c3 2744 case ETHTOOL_GCHANNELS:
2745 rc = ethtool_get_channels(dev, useraddr);
2746 break;
2747 case ETHTOOL_SCHANNELS:
2748 rc = ethtool_set_channels(dev, useraddr);
2749 break;
29dd54b7
AC		 2750 case ETHTOOL_SET_DUMP:
2751 rc = ethtool_set_dump(dev, useraddr);
2752 break;
2753 case ETHTOOL_GET_DUMP_FLAG:
2754 rc = ethtool_get_dump_flag(dev, useraddr);
2755 break;
2756 case ETHTOOL_GET_DUMP_DATA:
2757 rc = ethtool_get_dump_data(dev, useraddr);
2758 break;
c8f3a8c3
RC		 2759 case ETHTOOL_GET_TS_INFO:
2760 rc = ethtool_get_ts_info(dev, useraddr);
2761 break;
41c3cb6d
SH		 2762 case ETHTOOL_GMODULEINFO:
2763 rc = ethtool_get_module_info(dev, useraddr);
2764 break;
2765 case ETHTOOL_GMODULEEEPROM:
2766 rc = ethtool_get_module_eeprom(dev, useraddr);
2767 break;
f0db9b07
GV		 2768 case ETHTOOL_GTUNABLE:
2769 rc = ethtool_get_tunable(dev, useraddr);
2770 break;
2771 case ETHTOOL_STUNABLE:
2772 rc = ethtool_set_tunable(dev, useraddr);
2773 break;
f3a40945
AL		 2774 case ETHTOOL_GPHYSTATS:
2775 rc = ethtool_get_phy_stats(dev, useraddr);
2776 break;
ac2c7ad0
KL		 2777 case ETHTOOL_PERQUEUE:
2778 rc = ethtool_set_per_queue(dev, useraddr);
2779 break;
3f1ac7a7
DD		 2780 case ETHTOOL_GLINKSETTINGS:
2781 rc = ethtool_get_link_ksettings(dev, useraddr);
2782 break;
2783 case ETHTOOL_SLINKSETTINGS:
2784 rc = ethtool_set_link_ksettings(dev, useraddr);
2785 break;
968ad9da
RL		 2786 case ETHTOOL_PHY_GTUNABLE:
2787 rc = get_phy_tunable(dev, useraddr);
2788 break;
2789 case ETHTOOL_PHY_STUNABLE:
2790 rc = set_phy_tunable(dev, useraddr);
2791 break;
1da177e4 2792 default:
61a44b9c 2793 rc = -EOPNOTSUPP;
1da177e4 2794 }
4ec93edb 2795
e71a4783 2796 if (dev->ethtool_ops->complete)
1da177e4 2797 dev->ethtool_ops->complete(dev);
d8a33ac4
SH		 2798
2799 if (old_features != dev->features)
2800 netdev_features_change(dev);
2801
1da177e4 2802 return rc;
1da177e4 2803}
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