]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blame - net/core/ethtool.c
projects / mirror_ubuntu-zesty-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
GSO: Add GSO type for fixed IPv4 ID
[mirror_ubuntu-zesty-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
BH		 26#include <linux/rtnetlink.h>
27#include <linux/sched.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",
cb32f511 87 [NETIF_F_GSO_IPIP_BIT] = "tx-ipip-segmentation",
61c1db7f 88 [NETIF_F_GSO_SIT_BIT] = "tx-sit-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",
9d921549
MM		 91
92 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
53692b1d 93 [NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
9d921549
MM		 94 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
95 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
96 [NETIF_F_RXHASH_BIT] = "rx-hashing",
97 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
98 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
99 [NETIF_F_LOOPBACK_BIT] = "loopback",
36eabda3 100 [NETIF_F_RXFCS_BIT] = "rx-fcs",
5e0c03c8 101 [NETIF_F_RXALL_BIT] = "rx-all",
a6cc0cfa 102 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
d0290214 103 [NETIF_F_BUSY_POLL_BIT] = "busy-poll",
1c78c64e 104 [NETIF_F_HW_TC_BIT] = "hw-tc-offload",
9d921549
MM		 105};
106
892311f6
EP		 107static const char
108rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
109 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
110 [ETH_RSS_HASH_XOR_BIT] = "xor",
111};
112
a4244b0c
HHZ		 113static const char
114tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
115 [ETHTOOL_ID_UNSPEC] = "Unspec",
116 [ETHTOOL_RX_COPYBREAK] = "rx-copybreak",
117 [ETHTOOL_TX_COPYBREAK] = "tx-copybreak",
118};
119
5455c699
MM		 120static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
121{
122 struct ethtool_gfeatures cmd = {
123 .cmd = ETHTOOL_GFEATURES,
124 .size = ETHTOOL_DEV_FEATURE_WORDS,
125 };
475414f6 126 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
5455c699
MM		 127 u32 __user *sizeaddr;
128 u32 copy_size;
475414f6
MM		 129 int i;
130
131 /* in case feature bits run out again */
09da71b1 132 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
475414f6
MM		 133
134 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 135 features[i].available = (u32)(dev->hw_features >> (32 * i));
136 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
137 features[i].active = (u32)(dev->features >> (32 * i));
138 features[i].never_changed =
139 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
475414f6 140 }
5455c699
MM		 141
142 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
143 if (get_user(copy_size, sizeaddr))
144 return -EFAULT;
145
146 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
147 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
148
149 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
150 return -EFAULT;
151 useraddr += sizeof(cmd);
152 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
153 return -EFAULT;
154
155 return 0;
156}
157
158static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
159{
160 struct ethtool_sfeatures cmd;
161 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
475414f6
MM		 162 netdev_features_t wanted = 0, valid = 0;
163 int i, ret = 0;
5455c699
MM		 164
165 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
166 return -EFAULT;
167 useraddr += sizeof(cmd);
168
169 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
170 return -EINVAL;
171
172 if (copy_from_user(features, useraddr, sizeof(features)))
173 return -EFAULT;
174
475414f6 175 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 176 valid |= (netdev_features_t)features[i].valid << (32 * i);
177 wanted |= (netdev_features_t)features[i].requested << (32 * i);
475414f6
MM		 178 }
179
180 if (valid & ~NETIF_F_ETHTOOL_BITS)
5455c699
MM		 181 return -EINVAL;
182
475414f6
MM		 183 if (valid & ~dev->hw_features) {
184 valid &= dev->hw_features;
5455c699
MM		 185 ret |= ETHTOOL_F_UNSUPPORTED;
186 }
187
475414f6
MM		 188 dev->wanted_features &= ~valid;
189 dev->wanted_features |= wanted & valid;
6cb6a27c 190 __netdev_update_features(dev);
5455c699 191
475414f6 192 if ((dev->wanted_features ^ dev->features) & valid)
5455c699
MM		 193 ret |= ETHTOOL_F_WISH;
194
195 return ret;
196}
197
f3a40945
AL		 198static int phy_get_sset_count(struct phy_device *phydev)
199{
200 int ret;
201
202 if (phydev->drv->get_sset_count &&
203 phydev->drv->get_strings &&
204 phydev->drv->get_stats) {
205 mutex_lock(&phydev->lock);
206 ret = phydev->drv->get_sset_count(phydev);
207 mutex_unlock(&phydev->lock);
208
209 return ret;
210 }
211
212 return -EOPNOTSUPP;
213}
214
340ae165
MM		 215static int __ethtool_get_sset_count(struct net_device *dev, int sset)
216{
217 const struct ethtool_ops *ops = dev->ethtool_ops;
218
5455c699
MM		 219 if (sset == ETH_SS_FEATURES)
220 return ARRAY_SIZE(netdev_features_strings);
221
892311f6
EP		 222 if (sset == ETH_SS_RSS_HASH_FUNCS)
223 return ARRAY_SIZE(rss_hash_func_strings);
224
a4244b0c
HHZ		 225 if (sset == ETH_SS_TUNABLES)
226 return ARRAY_SIZE(tunable_strings);
227
f3a40945
AL		 228 if (sset == ETH_SS_PHY_STATS) {
229 if (dev->phydev)
230 return phy_get_sset_count(dev->phydev);
231 else
232 return -EOPNOTSUPP;
233 }
234
c03a14e8 235 if (ops->get_sset_count && ops->get_strings)
340ae165
MM		 236 return ops->get_sset_count(dev, sset);
237 else
238 return -EOPNOTSUPP;
239}
240
241static void __ethtool_get_strings(struct net_device *dev,
242 u32 stringset, u8 *data)
243{
244 const struct ethtool_ops *ops = dev->ethtool_ops;
245
5455c699
MM		 246 if (stringset == ETH_SS_FEATURES)
247 memcpy(data, netdev_features_strings,
248 sizeof(netdev_features_strings));
892311f6
EP		 249 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
250 memcpy(data, rss_hash_func_strings,
251 sizeof(rss_hash_func_strings));
a4244b0c
HHZ		 252 else if (stringset == ETH_SS_TUNABLES)
253 memcpy(data, tunable_strings, sizeof(tunable_strings));
f3a40945
AL		 254 else if (stringset == ETH_SS_PHY_STATS) {
255 struct phy_device *phydev = dev->phydev;
256
257 if (phydev) {
258 mutex_lock(&phydev->lock);
259 phydev->drv->get_strings(phydev, data);
260 mutex_unlock(&phydev->lock);
261 } else {
262 return;
263 }
264 } else
5455c699
MM		 265 /* ops->get_strings is valid because checked earlier */
266 ops->get_strings(dev, stringset, data);
340ae165
MM		 267}
268
c8f44aff 269static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
0a417704
MM		 270{
271 /* feature masks of legacy discrete ethtool ops */
272
273 switch (eth_cmd) {
274 case ETHTOOL_GTXCSUM:
275 case ETHTOOL_STXCSUM:
a188222b 276 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
e83d360d
MM		 277 case ETHTOOL_GRXCSUM:
278 case ETHTOOL_SRXCSUM:
279 return NETIF_F_RXCSUM;
0a417704
MM		 280 case ETHTOOL_GSG:
281 case ETHTOOL_SSG:
282 return NETIF_F_SG;
283 case ETHTOOL_GTSO:
284 case ETHTOOL_STSO:
285 return NETIF_F_ALL_TSO;
286 case ETHTOOL_GUFO:
287 case ETHTOOL_SUFO:
288 return NETIF_F_UFO;
289 case ETHTOOL_GGSO:
290 case ETHTOOL_SGSO:
291 return NETIF_F_GSO;
292 case ETHTOOL_GGRO:
293 case ETHTOOL_SGRO:
294 return NETIF_F_GRO;
295 default:
296 BUG();
297 }
298}
299
0a417704
MM		 300static int ethtool_get_one_feature(struct net_device *dev,
301 char __user *useraddr, u32 ethcmd)
302{
c8f44aff 303 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
0a417704
MM		 304 struct ethtool_value edata = {
305 .cmd = ethcmd,
86794881 306 .data = !!(dev->features & mask),
0a417704 307 };
0a417704 308
0a417704
MM		 309 if (copy_to_user(useraddr, &edata, sizeof(edata)))
310 return -EFAULT;
311 return 0;
312}
313
0a417704
MM		 314static int ethtool_set_one_feature(struct net_device *dev,
315 void __user *useraddr, u32 ethcmd)
316{
317 struct ethtool_value edata;
c8f44aff 318 netdev_features_t mask;
0a417704
MM		 319
320 if (copy_from_user(&edata, useraddr, sizeof(edata)))
321 return -EFAULT;
322
86794881
MM		 323 mask = ethtool_get_feature_mask(ethcmd);
324 mask &= dev->hw_features;
bc5787c6
MM		 325 if (!mask)
326 return -EOPNOTSUPP;
86794881 327
bc5787c6
MM		 328 if (edata.data)
329 dev->wanted_features |= mask;
330 else
331 dev->wanted_features &= ~mask;
86794881 332
bc5787c6 333 __netdev_update_features(dev);
86794881 334
bc5787c6
MM		 335 return 0;
336}
337
02b3a552
MM		 338#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
339 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
f646968f
PM		 340#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
341 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
342 NETIF_F_RXHASH)
bc5787c6
MM		 343
344static u32 __ethtool_get_flags(struct net_device *dev)
345{
02b3a552
MM		 346 u32 flags = 0;
347
8a73125c
DF		 348 if (dev->features & NETIF_F_LRO)
349 flags |= ETH_FLAG_LRO;
350 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
351 flags |= ETH_FLAG_RXVLAN;
352 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
353 flags |= ETH_FLAG_TXVLAN;
354 if (dev->features & NETIF_F_NTUPLE)
355 flags |= ETH_FLAG_NTUPLE;
356 if (dev->features & NETIF_F_RXHASH)
357 flags |= ETH_FLAG_RXHASH;
02b3a552
MM		 358
359 return flags;
0a417704
MM		 360}
361
bc5787c6 362static int __ethtool_set_flags(struct net_device *dev, u32 data)
da8ac86c 363{
c8f44aff 364 netdev_features_t features = 0, changed;
da8ac86c 365
02b3a552 366 if (data & ~ETH_ALL_FLAGS)
da8ac86c
MM		 367 return -EINVAL;
368
8a73125c
DF		 369 if (data & ETH_FLAG_LRO)
370 features |= NETIF_F_LRO;
371 if (data & ETH_FLAG_RXVLAN)
372 features |= NETIF_F_HW_VLAN_CTAG_RX;
373 if (data & ETH_FLAG_TXVLAN)
374 features |= NETIF_F_HW_VLAN_CTAG_TX;
375 if (data & ETH_FLAG_NTUPLE)
376 features |= NETIF_F_NTUPLE;
377 if (data & ETH_FLAG_RXHASH)
378 features |= NETIF_F_RXHASH;
02b3a552 379
da8ac86c 380 /* allow changing only bits set in hw_features */
02b3a552 381 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
da8ac86c
MM		 382 if (changed & ~dev->hw_features)
383 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
384
385 dev->wanted_features =
02b3a552 386 (dev->wanted_features & ~changed) | (features & changed);
da8ac86c 387
6cb6a27c 388 __netdev_update_features(dev);
da8ac86c
MM		 389
390 return 0;
391}
392
3f1ac7a7
DD		 393static void convert_legacy_u32_to_link_mode(unsigned long *dst, u32 legacy_u32)
394{
395 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
396 dst[0] = legacy_u32;
397}
398
399/* return false if src had higher bits set. lower bits always updated. */
400static bool convert_link_mode_to_legacy_u32(u32 *legacy_u32,
401 const unsigned long *src)
402{
403 bool retval = true;
404
405 /* TODO: following test will soon always be true */
406 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
407 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
408
409 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
410 bitmap_fill(ext, 32);
411 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
412 if (bitmap_intersects(ext, src,
413 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
414 /* src mask goes beyond bit 31 */
415 retval = false;
416 }
417 }
418 *legacy_u32 = src[0];
419 return retval;
420}
421
422/* return false if legacy contained non-0 deprecated fields
423 * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
424 */
425static bool
426convert_legacy_settings_to_link_ksettings(
427 struct ethtool_link_ksettings *link_ksettings,
428 const struct ethtool_cmd *legacy_settings)
429{
430 bool retval = true;
431
432 memset(link_ksettings, 0, sizeof(*link_ksettings));
433
434 /* This is used to tell users that driver is still using these
435 * deprecated legacy fields, and they should not use
436 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
437 */
438 if (legacy_settings->transceiver ||
439 legacy_settings->maxtxpkt ||
440 legacy_settings->maxrxpkt)
441 retval = false;
442
443 convert_legacy_u32_to_link_mode(
444 link_ksettings->link_modes.supported,
445 legacy_settings->supported);
446 convert_legacy_u32_to_link_mode(
447 link_ksettings->link_modes.advertising,
448 legacy_settings->advertising);
449 convert_legacy_u32_to_link_mode(
450 link_ksettings->link_modes.lp_advertising,
451 legacy_settings->lp_advertising);
452 link_ksettings->base.speed
453 = ethtool_cmd_speed(legacy_settings);
454 link_ksettings->base.duplex
455 = legacy_settings->duplex;
456 link_ksettings->base.port
457 = legacy_settings->port;
458 link_ksettings->base.phy_address
459 = legacy_settings->phy_address;
460 link_ksettings->base.autoneg
461 = legacy_settings->autoneg;
462 link_ksettings->base.mdio_support
463 = legacy_settings->mdio_support;
464 link_ksettings->base.eth_tp_mdix
465 = legacy_settings->eth_tp_mdix;
466 link_ksettings->base.eth_tp_mdix_ctrl
467 = legacy_settings->eth_tp_mdix_ctrl;
468 return retval;
469}
470
471/* return false if ksettings link modes had higher bits
472 * set. legacy_settings always updated (best effort)
473 */
474static bool
475convert_link_ksettings_to_legacy_settings(
476 struct ethtool_cmd *legacy_settings,
477 const struct ethtool_link_ksettings *link_ksettings)
478{
479 bool retval = true;
480
481 memset(legacy_settings, 0, sizeof(*legacy_settings));
482 /* this also clears the deprecated fields in legacy structure:
483 * __u8 transceiver;
484 * __u32 maxtxpkt;
485 * __u32 maxrxpkt;
486 */
487
488 retval &= convert_link_mode_to_legacy_u32(
489 &legacy_settings->supported,
490 link_ksettings->link_modes.supported);
491 retval &= convert_link_mode_to_legacy_u32(
492 &legacy_settings->advertising,
493 link_ksettings->link_modes.advertising);
494 retval &= convert_link_mode_to_legacy_u32(
495 &legacy_settings->lp_advertising,
496 link_ksettings->link_modes.lp_advertising);
497 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
498 legacy_settings->duplex
499 = link_ksettings->base.duplex;
500 legacy_settings->port
501 = link_ksettings->base.port;
502 legacy_settings->phy_address
503 = link_ksettings->base.phy_address;
504 legacy_settings->autoneg
505 = link_ksettings->base.autoneg;
506 legacy_settings->mdio_support
507 = link_ksettings->base.mdio_support;
508 legacy_settings->eth_tp_mdix
509 = link_ksettings->base.eth_tp_mdix;
510 legacy_settings->eth_tp_mdix_ctrl
511 = link_ksettings->base.eth_tp_mdix_ctrl;
512 return retval;
513}
514
515/* number of 32-bit words to store the user's link mode bitmaps */
516#define __ETHTOOL_LINK_MODE_MASK_NU32 \
517 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
518
519/* layout of the struct passed from/to userland */
520struct ethtool_link_usettings {
521 struct ethtool_link_settings base;
522 struct {
523 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
524 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
525 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
526 } link_modes;
527};
528
529/* Internal kernel helper to query a device ethtool_link_settings.
530 *
531 * Backward compatibility note: for compatibility with legacy drivers
532 * that implement only the ethtool_cmd API, this has to work with both
533 * drivers implementing get_link_ksettings API and drivers
534 * implementing get_settings API. When drivers implement get_settings
535 * and report ethtool_cmd deprecated fields
536 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
537 * because the resulting struct ethtool_link_settings does not report them.
538 */
539int __ethtool_get_link_ksettings(struct net_device *dev,
540 struct ethtool_link_ksettings *link_ksettings)
541{
542 int err;
543 struct ethtool_cmd cmd;
544
545 ASSERT_RTNL();
546
547 if (dev->ethtool_ops->get_link_ksettings) {
548 memset(link_ksettings, 0, sizeof(*link_ksettings));
549 return dev->ethtool_ops->get_link_ksettings(dev,
550 link_ksettings);
551 }
552
553 /* driver doesn't support %ethtool_link_ksettings API. revert to
554 * legacy %ethtool_cmd API, unless it's not supported either.
555 * TODO: remove when ethtool_ops::get_settings disappears internally
556 */
3237fc63
DD		 557 if (!dev->ethtool_ops->get_settings)
558 return -EOPNOTSUPP;
559
560 memset(&cmd, 0, sizeof(cmd));
561 cmd.cmd = ETHTOOL_GSET;
562 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 563 if (err < 0)
564 return err;
565
566 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
567 */
568 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
569 return err;
570}
571EXPORT_SYMBOL(__ethtool_get_link_ksettings);
572
573/* convert ethtool_link_usettings in user space to a kernel internal
574 * ethtool_link_ksettings. return 0 on success, errno on error.
575 */
576static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
577 const void __user *from)
578{
579 struct ethtool_link_usettings link_usettings;
580
581 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
582 return -EFAULT;
583
584 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
585 bitmap_from_u32array(to->link_modes.supported,
586 __ETHTOOL_LINK_MODE_MASK_NBITS,
587 link_usettings.link_modes.supported,
588 __ETHTOOL_LINK_MODE_MASK_NU32);
589 bitmap_from_u32array(to->link_modes.advertising,
590 __ETHTOOL_LINK_MODE_MASK_NBITS,
591 link_usettings.link_modes.advertising,
592 __ETHTOOL_LINK_MODE_MASK_NU32);
593 bitmap_from_u32array(to->link_modes.lp_advertising,
594 __ETHTOOL_LINK_MODE_MASK_NBITS,
595 link_usettings.link_modes.lp_advertising,
596 __ETHTOOL_LINK_MODE_MASK_NU32);
597
598 return 0;
599}
600
601/* convert a kernel internal ethtool_link_ksettings to
602 * ethtool_link_usettings in user space. return 0 on success, errno on
603 * error.
604 */
605static int
606store_link_ksettings_for_user(void __user *to,
607 const struct ethtool_link_ksettings *from)
608{
609 struct ethtool_link_usettings link_usettings;
610
611 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
612 bitmap_to_u32array(link_usettings.link_modes.supported,
613 __ETHTOOL_LINK_MODE_MASK_NU32,
614 from->link_modes.supported,
615 __ETHTOOL_LINK_MODE_MASK_NBITS);
616 bitmap_to_u32array(link_usettings.link_modes.advertising,
617 __ETHTOOL_LINK_MODE_MASK_NU32,
618 from->link_modes.advertising,
619 __ETHTOOL_LINK_MODE_MASK_NBITS);
620 bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
621 __ETHTOOL_LINK_MODE_MASK_NU32,
622 from->link_modes.lp_advertising,
623 __ETHTOOL_LINK_MODE_MASK_NBITS);
624
625 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
626 return -EFAULT;
627
628 return 0;
629}
630
631/* Query device for its ethtool_link_settings.
632 *
633 * Backward compatibility note: this function must fail when driver
634 * does not implement ethtool::get_link_ksettings, even if legacy
635 * ethtool_ops::get_settings is implemented. This tells new versions
636 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
637 * this driver, so that they can correctly access the ethtool_cmd
638 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
639 * implements ethtool_ops::get_settings anymore.
640 */
641static int ethtool_get_link_ksettings(struct net_device *dev,
642 void __user *useraddr)
643{
644 int err = 0;
645 struct ethtool_link_ksettings link_ksettings;
646
647 ASSERT_RTNL();
648
649 if (!dev->ethtool_ops->get_link_ksettings)
650 return -EOPNOTSUPP;
651
652 /* handle bitmap nbits handshake */
653 if (copy_from_user(&link_ksettings.base, useraddr,
654 sizeof(link_ksettings.base)))
655 return -EFAULT;
656
657 if (__ETHTOOL_LINK_MODE_MASK_NU32
658 != link_ksettings.base.link_mode_masks_nwords) {
659 /* wrong link mode nbits requested */
660 memset(&link_ksettings, 0, sizeof(link_ksettings));
793cf87d 661 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
3f1ac7a7
DD		 662 /* send back number of words required as negative val */
663 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
664 "need too many bits for link modes!");
665 link_ksettings.base.link_mode_masks_nwords
666 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
667
668 /* copy the base fields back to user, not the link
669 * mode bitmaps
670 */
671 if (copy_to_user(useraddr, &link_ksettings.base,
672 sizeof(link_ksettings.base)))
673 return -EFAULT;
674
675 return 0;
676 }
677
678 /* handshake successful: user/kernel agree on
679 * link_mode_masks_nwords
680 */
681
682 memset(&link_ksettings, 0, sizeof(link_ksettings));
683 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
684 if (err < 0)
685 return err;
686
687 /* make sure we tell the right values to user */
688 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
689 link_ksettings.base.link_mode_masks_nwords
690 = __ETHTOOL_LINK_MODE_MASK_NU32;
691
692 return store_link_ksettings_for_user(useraddr, &link_ksettings);
693}
694
695/* Update device ethtool_link_settings.
696 *
697 * Backward compatibility note: this function must fail when driver
698 * does not implement ethtool::set_link_ksettings, even if legacy
699 * ethtool_ops::set_settings is implemented. This tells new versions
700 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
701 * this driver, so that they can correctly update the ethtool_cmd
702 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
703 * implements ethtool_ops::get_settings anymore.
704 */
705static int ethtool_set_link_ksettings(struct net_device *dev,
706 void __user *useraddr)
707{
708 int err;
709 struct ethtool_link_ksettings link_ksettings;
710
711 ASSERT_RTNL();
712
713 if (!dev->ethtool_ops->set_link_ksettings)
714 return -EOPNOTSUPP;
715
716 /* make sure nbits field has expected value */
717 if (copy_from_user(&link_ksettings.base, useraddr,
718 sizeof(link_ksettings.base)))
719 return -EFAULT;
720
721 if (__ETHTOOL_LINK_MODE_MASK_NU32
722 != link_ksettings.base.link_mode_masks_nwords)
723 return -EINVAL;
724
725 /* copy the whole structure, now that we know it has expected
726 * format
727 */
728 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
729 if (err)
730 return err;
731
732 /* re-check nwords field, just in case */
733 if (__ETHTOOL_LINK_MODE_MASK_NU32
734 != link_ksettings.base.link_mode_masks_nwords)
735 return -EINVAL;
736
737 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
738}
739
3f1ac7a7
DD		 740static void
741warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
742{
743 char name[sizeof(current->comm)];
744
745 pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
746 get_task_comm(name, current), details);
747}
748
749/* Query device for its ethtool_cmd settings.
750 *
751 * Backward compatibility note: for compatibility with legacy ethtool,
752 * this has to work with both drivers implementing get_link_ksettings
753 * API and drivers implementing get_settings API. When drivers
754 * implement get_link_ksettings and report higher link mode bits, a
755 * kernel warning is logged once (with name of 1st driver/device) to
756 * recommend user to upgrade ethtool, but the command is successful
757 * (only the lower link mode bits reported back to user).
758 */
4bc71cb9
JP		 759static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
760{
4bc71cb9
JP		 761 struct ethtool_cmd cmd;
762
3f1ac7a7
DD		 763 ASSERT_RTNL();
764
765 if (dev->ethtool_ops->get_link_ksettings) {
766 /* First, use link_ksettings API if it is supported */
767 int err;
768 struct ethtool_link_ksettings link_ksettings;
769
770 memset(&link_ksettings, 0, sizeof(link_ksettings));
771 err = dev->ethtool_ops->get_link_ksettings(dev,
772 &link_ksettings);
773 if (err < 0)
774 return err;
775 if (!convert_link_ksettings_to_legacy_settings(&cmd,
776 &link_ksettings))
777 warn_incomplete_ethtool_legacy_settings_conversion(
778 "link modes are only partially reported");
779
780 /* send a sensible cmd tag back to user */
781 cmd.cmd = ETHTOOL_GSET;
782 } else {
3f1ac7a7
DD		 783 /* driver doesn't support %ethtool_link_ksettings
784 * API. revert to legacy %ethtool_cmd API, unless it's
785 * not supported either.
786 */
3237fc63
DD		 787 int err;
788
789 if (!dev->ethtool_ops->get_settings)
790 return -EOPNOTSUPP;
791
792 memset(&cmd, 0, sizeof(cmd));
793 cmd.cmd = ETHTOOL_GSET;
794 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 795 if (err < 0)
796 return err;
797 }
1da177e4
LT		 798
799 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
800 return -EFAULT;
3f1ac7a7 801
1da177e4
LT		 802 return 0;
803}
804
3f1ac7a7
DD		 805/* Update device link settings with given ethtool_cmd.
806 *
807 * Backward compatibility note: for compatibility with legacy ethtool,
808 * this has to work with both drivers implementing set_link_ksettings
809 * API and drivers implementing set_settings API. When drivers
810 * implement set_link_ksettings and user's request updates deprecated
811 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
812 * warning is logged once (with name of 1st driver/device) to
813 * recommend user to upgrade ethtool, and the request is rejected.
814 */
1da177e4
LT		 815static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
816{
817 struct ethtool_cmd cmd;
818
3f1ac7a7 819 ASSERT_RTNL();
1da177e4
LT		 820
821 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
822 return -EFAULT;
823
3f1ac7a7
DD		 824 /* first, try new %ethtool_link_ksettings API. */
825 if (dev->ethtool_ops->set_link_ksettings) {
826 struct ethtool_link_ksettings link_ksettings;
827
828 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
829 &cmd))
830 return -EINVAL;
831
832 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
833 link_ksettings.base.link_mode_masks_nwords
834 = __ETHTOOL_LINK_MODE_MASK_NU32;
835 return dev->ethtool_ops->set_link_ksettings(dev,
836 &link_ksettings);
837 }
838
839 /* legacy %ethtool_cmd API */
840
841 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
842 * disappears internally
843 */
844
845 if (!dev->ethtool_ops->set_settings)
846 return -EOPNOTSUPP;
847
1da177e4
LT		 848 return dev->ethtool_ops->set_settings(dev, &cmd);
849}
850
97f8aefb 851static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
852 void __user *useraddr)
1da177e4
LT		 853{
854 struct ethtool_drvinfo info;
76fd8593 855 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 856
1da177e4
LT		 857 memset(&info, 0, sizeof(info));
858 info.cmd = ETHTOOL_GDRVINFO;
c03a14e8 859 if (ops->get_drvinfo) {
01414802
BH		 860 ops->get_drvinfo(dev, &info);
861 } else if (dev->dev.parent && dev->dev.parent->driver) {
862 strlcpy(info.bus_info, dev_name(dev->dev.parent),
863 sizeof(info.bus_info));
864 strlcpy(info.driver, dev->dev.parent->driver->name,
865 sizeof(info.driver));
866 } else {
867 return -EOPNOTSUPP;
868 }
1da177e4 869
723b2f57
JG		 870 /*
871 * this method of obtaining string set info is deprecated;
d17792eb 872 * Use ETHTOOL_GSSET_INFO instead.
723b2f57 873 */
c03a14e8 874 if (ops->get_sset_count) {
ff03d49f
JG		 875 int rc;
876
877 rc = ops->get_sset_count(dev, ETH_SS_TEST);
878 if (rc >= 0)
879 info.testinfo_len = rc;
880 rc = ops->get_sset_count(dev, ETH_SS_STATS);
881 if (rc >= 0)
882 info.n_stats = rc;
339bf024
JG		 883 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
884 if (rc >= 0)
885 info.n_priv_flags = rc;
ff03d49f 886 }
c03a14e8 887 if (ops->get_regs_len)
1da177e4 888 info.regdump_len = ops->get_regs_len(dev);
c03a14e8 889 if (ops->get_eeprom_len)
1da177e4
LT		 890 info.eedump_len = ops->get_eeprom_len(dev);
891
892 if (copy_to_user(useraddr, &info, sizeof(info)))
893 return -EFAULT;
894 return 0;
895}
896
f5c445ed 897static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
97f8aefb 898 void __user *useraddr)
723b2f57
JG		 899{
900 struct ethtool_sset_info info;
723b2f57
JG		 901 u64 sset_mask;
902 int i, idx = 0, n_bits = 0, ret, rc;
903 u32 *info_buf = NULL;
904
723b2f57
JG		 905 if (copy_from_user(&info, useraddr, sizeof(info)))
906 return -EFAULT;
907
908 /* store copy of mask, because we zero struct later on */
909 sset_mask = info.sset_mask;
910 if (!sset_mask)
911 return 0;
912
913 /* calculate size of return buffer */
d17792eb 914 n_bits = hweight64(sset_mask);
723b2f57
JG		 915
916 memset(&info, 0, sizeof(info));
917 info.cmd = ETHTOOL_GSSET_INFO;
918
919 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
920 if (!info_buf)
921 return -ENOMEM;
922
923 /*
924 * fill return buffer based on input bitmask and successful
925 * get_sset_count return
926 */
927 for (i = 0; i < 64; i++) {
928 if (!(sset_mask & (1ULL << i)))
929 continue;
930
340ae165 931 rc = __ethtool_get_sset_count(dev, i);
723b2f57
JG		 932 if (rc >= 0) {
933 info.sset_mask |= (1ULL << i);
934 info_buf[idx++] = rc;
935 }
936 }
937
938 ret = -EFAULT;
939 if (copy_to_user(useraddr, &info, sizeof(info)))
940 goto out;
941
942 useraddr += offsetof(struct ethtool_sset_info, data);
943 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
944 goto out;
945
946 ret = 0;
947
948out:
949 kfree(info_buf);
950 return ret;
951}
952
97f8aefb 953static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
bf988435 954 u32 cmd, void __user *useraddr)
0853ad66 955{
bf988435
BH		 956 struct ethtool_rxnfc info;
957 size_t info_size = sizeof(info);
55664f32 958 int rc;
0853ad66 959
59089d8d 960 if (!dev->ethtool_ops->set_rxnfc)
0853ad66
SB		 961 return -EOPNOTSUPP;
962
bf988435
BH		 963 /* struct ethtool_rxnfc was originally defined for
964 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
965 * members. User-space might still be using that
966 * definition. */
967 if (cmd == ETHTOOL_SRXFH)
968 info_size = (offsetof(struct ethtool_rxnfc, data) +
969 sizeof(info.data));
970
971 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 972 return -EFAULT;
973
55664f32
BH		 974 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
975 if (rc)
976 return rc;
977
978 if (cmd == ETHTOOL_SRXCLSRLINS &&
979 copy_to_user(useraddr, &info, info_size))
980 return -EFAULT;
981
982 return 0;
0853ad66
SB		 983}
984
97f8aefb 985static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
bf988435 986 u32 cmd, void __user *useraddr)
0853ad66
SB		 987{
988 struct ethtool_rxnfc info;
bf988435 989 size_t info_size = sizeof(info);
59089d8d
SB		 990 const struct ethtool_ops *ops = dev->ethtool_ops;
991 int ret;
992 void *rule_buf = NULL;
0853ad66 993
59089d8d 994 if (!ops->get_rxnfc)
0853ad66
SB		 995 return -EOPNOTSUPP;
996
bf988435
BH		 997 /* struct ethtool_rxnfc was originally defined for
998 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
999 * members. User-space might still be using that
1000 * definition. */
1001 if (cmd == ETHTOOL_GRXFH)
1002 info_size = (offsetof(struct ethtool_rxnfc, data) +
1003 sizeof(info.data));
1004
1005 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 1006 return -EFAULT;
1007
59089d8d
SB		 1008 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1009 if (info.rule_cnt > 0) {
db048b69 1010 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
ae6df5f9 1011 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
db048b69 1012 GFP_USER);
59089d8d
SB		 1013 if (!rule_buf)
1014 return -ENOMEM;
1015 }
1016 }
0853ad66 1017
59089d8d
SB		 1018 ret = ops->get_rxnfc(dev, &info, rule_buf);
1019 if (ret < 0)
1020 goto err_out;
1021
1022 ret = -EFAULT;
bf988435 1023 if (copy_to_user(useraddr, &info, info_size))
59089d8d
SB		 1024 goto err_out;
1025
1026 if (rule_buf) {
1027 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1028 if (copy_to_user(useraddr, rule_buf,
1029 info.rule_cnt * sizeof(u32)))
1030 goto err_out;
1031 }
1032 ret = 0;
1033
1034err_out:
c9caceca 1035 kfree(rule_buf);
59089d8d
SB		 1036
1037 return ret;
0853ad66
SB		 1038}
1039
3de0b592
VD		 1040static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1041 struct ethtool_rxnfc *rx_rings,
1042 u32 size)
1043{
fb95cd8d 1044 int i;
3de0b592
VD		 1045
1046 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
fb95cd8d 1047 return -EFAULT;
3de0b592
VD		 1048
1049 /* Validate ring indices */
fb95cd8d
BH		 1050 for (i = 0; i < size; i++)
1051 if (indir[i] >= rx_rings->data)
1052 return -EINVAL;
1053
1054 return 0;
3de0b592
VD		 1055}
1056
ba905f5e 1057u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
960fb622
ED		 1058
1059void netdev_rss_key_fill(void *buffer, size_t len)
1060{
1061 BUG_ON(len > sizeof(netdev_rss_key));
1062 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1063 memcpy(buffer, netdev_rss_key, len);
1064}
1065EXPORT_SYMBOL(netdev_rss_key_fill);
1066
d4ab4286
KJ		 1067static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1068{
1069 u32 dev_size, current_max = 0;
1070 u32 *indir;
1071 int ret;
1072
1073 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1074 !dev->ethtool_ops->get_rxfh)
1075 return -EOPNOTSUPP;
1076 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1077 if (dev_size == 0)
1078 return -EOPNOTSUPP;
1079
1080 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1081 if (!indir)
1082 return -ENOMEM;
1083
1084 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1085 if (ret)
1086 goto out;
1087
1088 while (dev_size--)
1089 current_max = max(current_max, indir[dev_size]);
1090
1091 *max = current_max;
1092
1093out:
1094 kfree(indir);
1095 return ret;
1096}
1097
a5b6ee29
BH		 1098static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1099 void __user *useraddr)
1100{
7850f63f
BH		 1101 u32 user_size, dev_size;
1102 u32 *indir;
a5b6ee29
BH		 1103 int ret;
1104
7850f63f 1105 if (!dev->ethtool_ops->get_rxfh_indir_size ||
fe62d001 1106 !dev->ethtool_ops->get_rxfh)
7850f63f
BH		 1107 return -EOPNOTSUPP;
1108 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1109 if (dev_size == 0)
a5b6ee29
BH		 1110 return -EOPNOTSUPP;
1111
7850f63f 1112 if (copy_from_user(&user_size,
a5b6ee29 1113 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1114 sizeof(user_size)))
a5b6ee29
BH		 1115 return -EFAULT;
1116
7850f63f
BH		 1117 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1118 &dev_size, sizeof(dev_size)))
1119 return -EFAULT;
1120
1121 /* If the user buffer size is 0, this is just a query for the
1122 * device table size. Otherwise, if it's smaller than the
1123 * device table size it's an error.
1124 */
1125 if (user_size < dev_size)
1126 return user_size == 0 ? 0 : -EINVAL;
1127
1128 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1129 if (!indir)
1130 return -ENOMEM;
1131
892311f6 1132 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
a5b6ee29
BH		 1133 if (ret)
1134 goto out;
1135
7850f63f
BH		 1136 if (copy_to_user(useraddr +
1137 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1138 indir, dev_size * sizeof(indir[0])))
a5b6ee29
BH		 1139 ret = -EFAULT;
1140
1141out:
1142 kfree(indir);
1143 return ret;
1144}
1145
1146static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1147 void __user *useraddr)
1148{
7850f63f
BH		 1149 struct ethtool_rxnfc rx_rings;
1150 u32 user_size, dev_size, i;
1151 u32 *indir;
c03a14e8 1152 const struct ethtool_ops *ops = dev->ethtool_ops;
a5b6ee29 1153 int ret;
3de0b592 1154 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
a5b6ee29 1155
fe62d001 1156 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
c03a14e8 1157 !ops->get_rxnfc)
7850f63f 1158 return -EOPNOTSUPP;
c03a14e8
JP		 1159
1160 dev_size = ops->get_rxfh_indir_size(dev);
7850f63f 1161 if (dev_size == 0)
a5b6ee29
BH		 1162 return -EOPNOTSUPP;
1163
7850f63f 1164 if (copy_from_user(&user_size,
a5b6ee29 1165 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1166 sizeof(user_size)))
a5b6ee29
BH		 1167 return -EFAULT;
1168
278bc429 1169 if (user_size != 0 && user_size != dev_size)
7850f63f
BH		 1170 return -EINVAL;
1171
1172 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1173 if (!indir)
1174 return -ENOMEM;
1175
7850f63f 1176 rx_rings.cmd = ETHTOOL_GRXRINGS;
c03a14e8 1177 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
7850f63f
BH		 1178 if (ret)
1179 goto out;
278bc429
BH		 1180
1181 if (user_size == 0) {
1182 for (i = 0; i < dev_size; i++)
1183 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1184 } else {
3de0b592
VD		 1185 ret = ethtool_copy_validate_indir(indir,
1186 useraddr + ringidx_offset,
1187 &rx_rings,
1188 dev_size);
1189 if (ret)
1190 goto out;
1191 }
1192
892311f6 1193 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
d4ab4286
KJ		 1194 if (ret)
1195 goto out;
1196
1197 /* indicate whether rxfh was set to default */
1198 if (user_size == 0)
1199 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1200 else
1201 dev->priv_flags |= IFF_RXFH_CONFIGURED;
3de0b592
VD		 1202
1203out:
1204 kfree(indir);
1205 return ret;
1206}
1207
1208static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1209 void __user *useraddr)
1210{
1211 int ret;
1212 const struct ethtool_ops *ops = dev->ethtool_ops;
f062a384 1213 u32 user_indir_size, user_key_size;
3de0b592 1214 u32 dev_indir_size = 0, dev_key_size = 0;
f062a384 1215 struct ethtool_rxfh rxfh;
3de0b592 1216 u32 total_size;
f062a384 1217 u32 indir_bytes;
3de0b592 1218 u32 *indir = NULL;
892311f6 1219 u8 dev_hfunc = 0;
3de0b592
VD		 1220 u8 *hkey = NULL;
1221 u8 *rss_config;
1222
892311f6 1223 if (!ops->get_rxfh)
3de0b592
VD		 1224 return -EOPNOTSUPP;
1225
1226 if (ops->get_rxfh_indir_size)
1227 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592
VD		 1228 if (ops->get_rxfh_key_size)
1229 dev_key_size = ops->get_rxfh_key_size(dev);
1230
f062a384 1231 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592 1232 return -EFAULT;
f062a384
BH		 1233 user_indir_size = rxfh.indir_size;
1234 user_key_size = rxfh.key_size;
3de0b592 1235
f062a384 1236 /* Check that reserved fields are 0 for now */
892311f6
EP		 1237 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1238 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1239 return -EINVAL;
1240
1241 rxfh.indir_size = dev_indir_size;
1242 rxfh.key_size = dev_key_size;
1243 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
3de0b592
VD		 1244 return -EFAULT;
1245
3de0b592
VD		 1246 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1247 (user_key_size && (user_key_size != dev_key_size)))
1248 return -EINVAL;
1249
1250 indir_bytes = user_indir_size * sizeof(indir[0]);
1251 total_size = indir_bytes + user_key_size;
1252 rss_config = kzalloc(total_size, GFP_USER);
1253 if (!rss_config)
1254 return -ENOMEM;
1255
1256 if (user_indir_size)
1257 indir = (u32 *)rss_config;
1258
1259 if (user_key_size)
1260 hkey = rss_config + indir_bytes;
1261
892311f6
EP		 1262 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1263 if (ret)
1264 goto out;
3de0b592 1265
892311f6
EP		 1266 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1267 &dev_hfunc, sizeof(rxfh.hfunc))) {
1268 ret = -EFAULT;
1269 } else if (copy_to_user(useraddr +
1270 offsetof(struct ethtool_rxfh, rss_config[0]),
1271 rss_config, total_size)) {
1272 ret = -EFAULT;
1273 }
1274out:
3de0b592
VD		 1275 kfree(rss_config);
1276
1277 return ret;
1278}
1279
1280static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1281 void __user *useraddr)
1282{
1283 int ret;
1284 const struct ethtool_ops *ops = dev->ethtool_ops;
1285 struct ethtool_rxnfc rx_rings;
f062a384
BH		 1286 struct ethtool_rxfh rxfh;
1287 u32 dev_indir_size = 0, dev_key_size = 0, i;
3de0b592
VD		 1288 u32 *indir = NULL, indir_bytes = 0;
1289 u8 *hkey = NULL;
1290 u8 *rss_config;
3de0b592
VD		 1291 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1292
892311f6 1293 if (!ops->get_rxnfc || !ops->set_rxfh)
3de0b592
VD		 1294 return -EOPNOTSUPP;
1295
1296 if (ops->get_rxfh_indir_size)
1297 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592 1298 if (ops->get_rxfh_key_size)
d340c862 1299 dev_key_size = ops->get_rxfh_key_size(dev);
3de0b592 1300
f062a384 1301 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592
VD		 1302 return -EFAULT;
1303
f062a384 1304 /* Check that reserved fields are 0 for now */
892311f6
EP		 1305 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1306 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1307 return -EINVAL;
1308
892311f6
EP		 1309 /* If either indir, hash key or function is valid, proceed further.
1310 * Must request at least one change: indir size, hash key or function.
3de0b592 1311 */
f062a384
BH		 1312 if ((rxfh.indir_size &&
1313 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1314 rxfh.indir_size != dev_indir_size) ||
1315 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1316 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
892311f6 1317 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
3de0b592
VD		 1318 return -EINVAL;
1319
f062a384 1320 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
3de0b592
VD		 1321 indir_bytes = dev_indir_size * sizeof(indir[0]);
1322
f062a384 1323 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
3de0b592
VD		 1324 if (!rss_config)
1325 return -ENOMEM;
1326
1327 rx_rings.cmd = ETHTOOL_GRXRINGS;
1328 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1329 if (ret)
1330 goto out;
1331
f062a384
BH		 1332 /* rxfh.indir_size == 0 means reset the indir table to default.
1333 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
3de0b592 1334 */
f062a384
BH		 1335 if (rxfh.indir_size &&
1336 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
3de0b592
VD		 1337 indir = (u32 *)rss_config;
1338 ret = ethtool_copy_validate_indir(indir,
1339 useraddr + rss_cfg_offset,
1340 &rx_rings,
f062a384 1341 rxfh.indir_size);
3de0b592 1342 if (ret)
7850f63f 1343 goto out;
f062a384 1344 } else if (rxfh.indir_size == 0) {
3de0b592
VD		 1345 indir = (u32 *)rss_config;
1346 for (i = 0; i < dev_indir_size; i++)
1347 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1348 }
278bc429 1349
f062a384 1350 if (rxfh.key_size) {
3de0b592
VD		 1351 hkey = rss_config + indir_bytes;
1352 if (copy_from_user(hkey,
1353 useraddr + rss_cfg_offset + indir_bytes,
f062a384 1354 rxfh.key_size)) {
3de0b592
VD		 1355 ret = -EFAULT;
1356 goto out;
278bc429 1357 }
7850f63f
BH		 1358 }
1359
892311f6 1360 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
d4ab4286
KJ		 1361 if (ret)
1362 goto out;
1363
1364 /* indicate whether rxfh was set to default */
1365 if (rxfh.indir_size == 0)
1366 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1367 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1368 dev->priv_flags |= IFF_RXFH_CONFIGURED;
a5b6ee29
BH		 1369
1370out:
3de0b592 1371 kfree(rss_config);
a5b6ee29
BH		 1372 return ret;
1373}
1374
1da177e4
LT		 1375static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1376{
1377 struct ethtool_regs regs;
76fd8593 1378 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 1379 void *regbuf;
1380 int reglen, ret;
1381
1382 if (!ops->get_regs || !ops->get_regs_len)
1383 return -EOPNOTSUPP;
1384
1385 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1386 return -EFAULT;
1387
1388 reglen = ops->get_regs_len(dev);
1389 if (regs.len > reglen)
1390 regs.len = reglen;
1391
b7c7d01a 1392 regbuf = vzalloc(reglen);
67ae7cf1 1393 if (reglen && !regbuf)
1da177e4
LT		 1394 return -ENOMEM;
1395
1396 ops->get_regs(dev, &regs, regbuf);
1397
1398 ret = -EFAULT;
1399 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1400 goto out;
1401 useraddr += offsetof(struct ethtool_regs, data);
67ae7cf1 1402 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1da177e4
LT		 1403 goto out;
1404 ret = 0;
1405
1406 out:
a77f5db3 1407 vfree(regbuf);
1da177e4
LT		 1408 return ret;
1409}
1410
d73d3a8c
BH		 1411static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1412{
1413 struct ethtool_value reset;
1414 int ret;
1415
1416 if (!dev->ethtool_ops->reset)
1417 return -EOPNOTSUPP;
1418
1419 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1420 return -EFAULT;
1421
1422 ret = dev->ethtool_ops->reset(dev, &reset.data);
1423 if (ret)
1424 return ret;
1425
1426 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1427 return -EFAULT;
1428 return 0;
1429}
1430
1da177e4
LT		 1431static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1432{
8e557421 1433 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1da177e4
LT		 1434
1435 if (!dev->ethtool_ops->get_wol)
1436 return -EOPNOTSUPP;
1437
1438 dev->ethtool_ops->get_wol(dev, &wol);
1439
1440 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1441 return -EFAULT;
1442 return 0;
1443}
1444
1445static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1446{
1447 struct ethtool_wolinfo wol;
1448
1449 if (!dev->ethtool_ops->set_wol)
1450 return -EOPNOTSUPP;
1451
1452 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1453 return -EFAULT;
1454
1455 return dev->ethtool_ops->set_wol(dev, &wol);
1456}
1457
80f12ecc
YM		 1458static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1459{
1460 struct ethtool_eee edata;
1461 int rc;
1462
1463 if (!dev->ethtool_ops->get_eee)
1464 return -EOPNOTSUPP;
1465
1466 memset(&edata, 0, sizeof(struct ethtool_eee));
1467 edata.cmd = ETHTOOL_GEEE;
1468 rc = dev->ethtool_ops->get_eee(dev, &edata);
1469
1470 if (rc)
1471 return rc;
1472
1473 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1474 return -EFAULT;
1475
1476 return 0;
1477}
1478
1479static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1480{
1481 struct ethtool_eee edata;
1482
1483 if (!dev->ethtool_ops->set_eee)
1484 return -EOPNOTSUPP;
1485
1486 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1487 return -EFAULT;
1488
1489 return dev->ethtool_ops->set_eee(dev, &edata);
1490}
1491
1da177e4
LT		 1492static int ethtool_nway_reset(struct net_device *dev)
1493{
1494 if (!dev->ethtool_ops->nway_reset)
1495 return -EOPNOTSUPP;
1496
1497 return dev->ethtool_ops->nway_reset(dev);
1498}
1499
e596e6e4
BH		 1500static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1501{
1502 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1503
1504 if (!dev->ethtool_ops->get_link)
1505 return -EOPNOTSUPP;
1506
1507 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1508
1509 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1510 return -EFAULT;
1511 return 0;
1512}
1513
081d094e
BH		 1514static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1515 int (*getter)(struct net_device *,
1516 struct ethtool_eeprom *, u8 *),
1517 u32 total_len)
1da177e4
LT		 1518{
1519 struct ethtool_eeprom eeprom;
b131dd5d
MSB		 1520 void __user *userbuf = useraddr + sizeof(eeprom);
1521 u32 bytes_remaining;
1da177e4 1522 u8 *data;
b131dd5d 1523 int ret = 0;
1da177e4 1524
1da177e4
LT		 1525 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1526 return -EFAULT;
1527
1528 /* Check for wrap and zero */
1529 if (eeprom.offset + eeprom.len <= eeprom.offset)
1530 return -EINVAL;
1531
1532 /* Check for exceeding total eeprom len */
081d094e 1533 if (eeprom.offset + eeprom.len > total_len)
1da177e4
LT		 1534 return -EINVAL;
1535
b131dd5d 1536 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1537 if (!data)
1538 return -ENOMEM;
1539
b131dd5d
MSB		 1540 bytes_remaining = eeprom.len;
1541 while (bytes_remaining > 0) {
1542 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1543
081d094e 1544 ret = getter(dev, &eeprom, data);
b131dd5d
MSB		 1545 if (ret)
1546 break;
1547 if (copy_to_user(userbuf, data, eeprom.len)) {
1548 ret = -EFAULT;
1549 break;
1550 }
1551 userbuf += eeprom.len;
1552 eeprom.offset += eeprom.len;
1553 bytes_remaining -= eeprom.len;
1554 }
1da177e4 1555
c5835df9
MSB		 1556 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1557 eeprom.offset -= eeprom.len;
1558 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1559 ret = -EFAULT;
1560
1da177e4
LT		 1561 kfree(data);
1562 return ret;
1563}
1564
081d094e
BH		 1565static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1566{
1567 const struct ethtool_ops *ops = dev->ethtool_ops;
1568
e0fb6fb6
GR		 1569 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1570 !ops->get_eeprom_len(dev))
081d094e
BH		 1571 return -EOPNOTSUPP;
1572
1573 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1574 ops->get_eeprom_len(dev));
1575}
1576
1da177e4
LT		 1577static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1578{
1579 struct ethtool_eeprom eeprom;
76fd8593 1580 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 1581 void __user *userbuf = useraddr + sizeof(eeprom);
1582 u32 bytes_remaining;
1da177e4 1583 u8 *data;
b131dd5d 1584 int ret = 0;
1da177e4 1585
e0fb6fb6
GR		 1586 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1587 !ops->get_eeprom_len(dev))
1da177e4
LT		 1588 return -EOPNOTSUPP;
1589
1590 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1591 return -EFAULT;
1592
1593 /* Check for wrap and zero */
1594 if (eeprom.offset + eeprom.len <= eeprom.offset)
1595 return -EINVAL;
1596
1597 /* Check for exceeding total eeprom len */
1598 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1599 return -EINVAL;
1600
b131dd5d 1601 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1602 if (!data)
1603 return -ENOMEM;
1604
b131dd5d
MSB		 1605 bytes_remaining = eeprom.len;
1606 while (bytes_remaining > 0) {
1607 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1608
1609 if (copy_from_user(data, userbuf, eeprom.len)) {
1610 ret = -EFAULT;
1611 break;
1612 }
1613 ret = ops->set_eeprom(dev, &eeprom, data);
1614 if (ret)
1615 break;
1616 userbuf += eeprom.len;
1617 eeprom.offset += eeprom.len;
1618 bytes_remaining -= eeprom.len;
1619 }
1da177e4 1620
1da177e4
LT		 1621 kfree(data);
1622 return ret;
1623}
1624
97f8aefb 1625static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1626 void __user *useraddr)
1da177e4 1627{
8e557421 1628 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1da177e4
LT		 1629
1630 if (!dev->ethtool_ops->get_coalesce)
1631 return -EOPNOTSUPP;
1632
1633 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1634
1635 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1636 return -EFAULT;
1637 return 0;
1638}
1639
97f8aefb 1640static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1641 void __user *useraddr)
1da177e4
LT		 1642{
1643 struct ethtool_coalesce coalesce;
1644
fa04ae5c 1645 if (!dev->ethtool_ops->set_coalesce)
1da177e4
LT		 1646 return -EOPNOTSUPP;
1647
1648 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1649 return -EFAULT;
1650
1651 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1652}
1653
1654static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1655{
8e557421 1656 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1da177e4
LT		 1657
1658 if (!dev->ethtool_ops->get_ringparam)
1659 return -EOPNOTSUPP;
1660
1661 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1662
1663 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1664 return -EFAULT;
1665 return 0;
1666}
1667
1668static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1669{
1670 struct ethtool_ringparam ringparam;
1671
1672 if (!dev->ethtool_ops->set_ringparam)
1673 return -EOPNOTSUPP;
1674
1675 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1676 return -EFAULT;
1677
1678 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1679}
1680
8b5933c3 1681static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1682 void __user *useraddr)
1683{
1684 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1685
1686 if (!dev->ethtool_ops->get_channels)
1687 return -EOPNOTSUPP;
1688
1689 dev->ethtool_ops->get_channels(dev, &channels);
1690
1691 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1692 return -EFAULT;
1693 return 0;
1694}
1695
1696static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1697 void __user *useraddr)
1698{
8bf36862 1699 struct ethtool_channels channels, max;
d4ab4286 1700 u32 max_rx_in_use = 0;
8b5933c3 1701
8bf36862 1702 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
8b5933c3 1703 return -EOPNOTSUPP;
1704
1705 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1706 return -EFAULT;
1707
8bf36862
KJ		 1708 dev->ethtool_ops->get_channels(dev, &max);
1709
1710 /* ensure new counts are within the maximums */
1711 if ((channels.rx_count > max.max_rx) ||
1712 (channels.tx_count > max.max_tx) ||
1713 (channels.combined_count > max.max_combined) ||
1714 (channels.other_count > max.max_other))
1715 return -EINVAL;
1716
d4ab4286
KJ		 1717 /* ensure the new Rx count fits within the configured Rx flow
1718 * indirection table settings */
1719 if (netif_is_rxfh_configured(dev) &&
1720 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1721 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1722 return -EINVAL;
1723
8b5933c3 1724 return dev->ethtool_ops->set_channels(dev, &channels);
1725}
1726
1da177e4
LT		 1727static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1728{
1729 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1730
1731 if (!dev->ethtool_ops->get_pauseparam)
1732 return -EOPNOTSUPP;
1733
1734 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1735
1736 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1737 return -EFAULT;
1738 return 0;
1739}
1740
1741static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1742{
1743 struct ethtool_pauseparam pauseparam;
1744
e1b90c41 1745 if (!dev->ethtool_ops->set_pauseparam)
1da177e4
LT		 1746 return -EOPNOTSUPP;
1747
1748 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1749 return -EFAULT;
1750
1751 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1752}
1753
1da177e4
LT		 1754static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1755{
1756 struct ethtool_test test;
76fd8593 1757 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1758 u64 *data;
ff03d49f 1759 int ret, test_len;
1da177e4 1760
a9828ec6 1761 if (!ops->self_test || !ops->get_sset_count)
1da177e4
LT		 1762 return -EOPNOTSUPP;
1763
a9828ec6 1764 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
ff03d49f
JG		 1765 if (test_len < 0)
1766 return test_len;
1767 WARN_ON(test_len == 0);
1768
1da177e4
LT		 1769 if (copy_from_user(&test, useraddr, sizeof(test)))
1770 return -EFAULT;
1771
ff03d49f
JG		 1772 test.len = test_len;
1773 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1da177e4
LT		 1774 if (!data)
1775 return -ENOMEM;
1776
1777 ops->self_test(dev, &test, data);
1778
1779 ret = -EFAULT;
1780 if (copy_to_user(useraddr, &test, sizeof(test)))
1781 goto out;
1782 useraddr += sizeof(test);
1783 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1784 goto out;
1785 ret = 0;
1786
1787 out:
1788 kfree(data);
1789 return ret;
1790}
1791
1792static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1793{
1794 struct ethtool_gstrings gstrings;
1da177e4
LT		 1795 u8 *data;
1796 int ret;
1797
1da177e4
LT		 1798 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1799 return -EFAULT;
1800
340ae165 1801 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
a9828ec6
BH		 1802 if (ret < 0)
1803 return ret;
1804
1805 gstrings.len = ret;
1da177e4 1806
077cb37f 1807 data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
1da177e4
LT		 1808 if (!data)
1809 return -ENOMEM;
1810
340ae165 1811 __ethtool_get_strings(dev, gstrings.string_set, data);
1da177e4
LT		 1812
1813 ret = -EFAULT;
1814 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1815 goto out;
1816 useraddr += sizeof(gstrings);
1817 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1818 goto out;
1819 ret = 0;
1820
340ae165 1821out:
1da177e4
LT		 1822 kfree(data);
1823 return ret;
1824}
1825
1826static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1827{
1828 struct ethtool_value id;
68f512f2 1829 static bool busy;
c03a14e8 1830 const struct ethtool_ops *ops = dev->ethtool_ops;
68f512f2 1831 int rc;
1da177e4 1832
c03a14e8 1833 if (!ops->set_phys_id)
1da177e4
LT		 1834 return -EOPNOTSUPP;
1835
68f512f2
BH		 1836 if (busy)
1837 return -EBUSY;
1838
1da177e4
LT		 1839 if (copy_from_user(&id, useraddr, sizeof(id)))
1840 return -EFAULT;
1841
c03a14e8 1842 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
fce55922 1843 if (rc < 0)
68f512f2
BH		 1844 return rc;
1845
1846 /* Drop the RTNL lock while waiting, but prevent reentry or
1847 * removal of the device.
1848 */
1849 busy = true;
1850 dev_hold(dev);
1851 rtnl_unlock();
1852
1853 if (rc == 0) {
1854 /* Driver will handle this itself */
1855 schedule_timeout_interruptible(
143780c6 1856 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
68f512f2 1857 } else {
fce55922
AB		 1858 /* Driver expects to be called at twice the frequency in rc */
1859 int n = rc * 2, i, interval = HZ / n;
1860
1861 /* Count down seconds */
68f512f2 1862 do {
fce55922
AB		 1863 /* Count down iterations per second */
1864 i = n;
1865 do {
1866 rtnl_lock();
c03a14e8 1867 rc = ops->set_phys_id(dev,
fce55922
AB		 1868 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1869 rtnl_unlock();
1870 if (rc)
1871 break;
1872 schedule_timeout_interruptible(interval);
1873 } while (!signal_pending(current) && --i != 0);
68f512f2
BH		 1874 } while (!signal_pending(current) &&
1875 (id.data == 0 || --id.data != 0));
1876 }
1877
1878 rtnl_lock();
1879 dev_put(dev);
1880 busy = false;
1881
c03a14e8 1882 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
68f512f2 1883 return rc;
1da177e4
LT		 1884}
1885
1886static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1887{
1888 struct ethtool_stats stats;
76fd8593 1889 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1890 u64 *data;
ff03d49f 1891 int ret, n_stats;
1da177e4 1892
a9828ec6 1893 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1da177e4
LT		 1894 return -EOPNOTSUPP;
1895
a9828ec6 1896 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
ff03d49f
JG		 1897 if (n_stats < 0)
1898 return n_stats;
1899 WARN_ON(n_stats == 0);
1900
1da177e4
LT		 1901 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1902 return -EFAULT;
1903
ff03d49f
JG		 1904 stats.n_stats = n_stats;
1905 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1da177e4
LT		 1906 if (!data)
1907 return -ENOMEM;
1908
1909 ops->get_ethtool_stats(dev, &stats, data);
1910
1911 ret = -EFAULT;
1912 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1913 goto out;
1914 useraddr += sizeof(stats);
1915 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1916 goto out;
1917 ret = 0;
1918
1919 out:
1920 kfree(data);
1921 return ret;
1922}
1923
f3a40945
AL		 1924static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1925{
1926 struct ethtool_stats stats;
1927 struct phy_device *phydev = dev->phydev;
1928 u64 *data;
1929 int ret, n_stats;
1930
1931 if (!phydev)
1932 return -EOPNOTSUPP;
1933
1934 n_stats = phy_get_sset_count(phydev);
1935
1936 if (n_stats < 0)
1937 return n_stats;
1938 WARN_ON(n_stats == 0);
1939
1940 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1941 return -EFAULT;
1942
1943 stats.n_stats = n_stats;
1944 data = kmalloc_array(n_stats, sizeof(u64), GFP_USER);
1945 if (!data)
1946 return -ENOMEM;
1947
1948 mutex_lock(&phydev->lock);
1949 phydev->drv->get_stats(phydev, &stats, data);
1950 mutex_unlock(&phydev->lock);
1951
1952 ret = -EFAULT;
1953 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1954 goto out;
1955 useraddr += sizeof(stats);
1956 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1957 goto out;
1958 ret = 0;
1959
1960 out:
1961 kfree(data);
1962 return ret;
1963}
1964
0bf0519d 1965static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
a6f9a705
JW		 1966{
1967 struct ethtool_perm_addr epaddr;
a6f9a705 1968
313674af 1969 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
a6f9a705
JW		 1970 return -EFAULT;
1971
313674af
MW		 1972 if (epaddr.size < dev->addr_len)
1973 return -ETOOSMALL;
1974 epaddr.size = dev->addr_len;
a6f9a705 1975
a6f9a705 1976 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
313674af 1977 return -EFAULT;
a6f9a705 1978 useraddr += sizeof(epaddr);
313674af
MW		 1979 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1980 return -EFAULT;
1981 return 0;
a6f9a705
JW		 1982}
1983
13c99b24
JG		 1984static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1985 u32 cmd, u32 (*actor)(struct net_device *))
3ae7c0b2 1986{
8e557421 1987 struct ethtool_value edata = { .cmd = cmd };
3ae7c0b2 1988
13c99b24 1989 if (!actor)
3ae7c0b2
JG		 1990 return -EOPNOTSUPP;
1991
13c99b24 1992 edata.data = actor(dev);
3ae7c0b2
JG		 1993
1994 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1995 return -EFAULT;
1996 return 0;
1997}
1998
13c99b24
JG		 1999static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2000 void (*actor)(struct net_device *, u32))
3ae7c0b2
JG		 2001{
2002 struct ethtool_value edata;
2003
13c99b24 2004 if (!actor)
3ae7c0b2
JG		 2005 return -EOPNOTSUPP;
2006
2007 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2008 return -EFAULT;
2009
13c99b24 2010 actor(dev, edata.data);
339bf024
JG		 2011 return 0;
2012}
2013
13c99b24
JG		 2014static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2015 int (*actor)(struct net_device *, u32))
339bf024
JG		 2016{
2017 struct ethtool_value edata;
2018
13c99b24 2019 if (!actor)
339bf024
JG		 2020 return -EOPNOTSUPP;
2021
2022 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2023 return -EFAULT;
2024
13c99b24 2025 return actor(dev, edata.data);
339bf024
JG		 2026}
2027
97f8aefb 2028static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2029 char __user *useraddr)
05c6a8d7
AK		 2030{
2031 struct ethtool_flash efl;
2032
2033 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2034 return -EFAULT;
2035
2036 if (!dev->ethtool_ops->flash_device)
2037 return -EOPNOTSUPP;
2038
786f5281
BH		 2039 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2040
05c6a8d7
AK		 2041 return dev->ethtool_ops->flash_device(dev, &efl);
2042}
2043
29dd54b7
AC		 2044static int ethtool_set_dump(struct net_device *dev,
2045 void __user *useraddr)
2046{
2047 struct ethtool_dump dump;
2048
2049 if (!dev->ethtool_ops->set_dump)
2050 return -EOPNOTSUPP;
2051
2052 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2053 return -EFAULT;
2054
2055 return dev->ethtool_ops->set_dump(dev, &dump);
2056}
2057
2058static int ethtool_get_dump_flag(struct net_device *dev,
2059 void __user *useraddr)
2060{
2061 int ret;
2062 struct ethtool_dump dump;
2063 const struct ethtool_ops *ops = dev->ethtool_ops;
2064
c03a14e8 2065 if (!ops->get_dump_flag)
29dd54b7
AC		 2066 return -EOPNOTSUPP;
2067
2068 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2069 return -EFAULT;
2070
2071 ret = ops->get_dump_flag(dev, &dump);
2072 if (ret)
2073 return ret;
2074
2075 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2076 return -EFAULT;
2077 return 0;
2078}
2079
2080static int ethtool_get_dump_data(struct net_device *dev,
2081 void __user *useraddr)
2082{
2083 int ret;
2084 __u32 len;
2085 struct ethtool_dump dump, tmp;
2086 const struct ethtool_ops *ops = dev->ethtool_ops;
2087 void *data = NULL;
2088
c03a14e8 2089 if (!ops->get_dump_data || !ops->get_dump_flag)
29dd54b7
AC		 2090 return -EOPNOTSUPP;
2091
2092 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2093 return -EFAULT;
2094
2095 memset(&tmp, 0, sizeof(tmp));
2096 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2097 ret = ops->get_dump_flag(dev, &tmp);
2098 if (ret)
2099 return ret;
2100
c590b5e2 2101 len = min(tmp.len, dump.len);
29dd54b7
AC		 2102 if (!len)
2103 return -EFAULT;
2104
c590b5e2
MS		 2105 /* Don't ever let the driver think there's more space available
2106 * than it requested with .get_dump_flag().
2107 */
2108 dump.len = len;
2109
2110 /* Always allocate enough space to hold the whole thing so that the
2111 * driver does not need to check the length and bother with partial
2112 * dumping.
2113 */
29dd54b7
AC		 2114 data = vzalloc(tmp.len);
2115 if (!data)
2116 return -ENOMEM;
2117 ret = ops->get_dump_data(dev, &dump, data);
2118 if (ret)
2119 goto out;
2120
c590b5e2
MS		 2121 /* There are two sane possibilities:
2122 * 1. The driver's .get_dump_data() does not touch dump.len.
2123 * 2. Or it may set dump.len to how much it really writes, which
2124 * should be tmp.len (or len if it can do a partial dump).
2125 * In any case respond to userspace with the actual length of data
2126 * it's receiving.
2127 */
2128 WARN_ON(dump.len != len && dump.len != tmp.len);
2129 dump.len = len;
2130
29dd54b7
AC		 2131 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2132 ret = -EFAULT;
2133 goto out;
2134 }
2135 useraddr += offsetof(struct ethtool_dump, data);
2136 if (copy_to_user(useraddr, data, len))
2137 ret = -EFAULT;
2138out:
2139 vfree(data);
2140 return ret;
2141}
2142
c8f3a8c3
RC		 2143static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2144{
2145 int err = 0;
2146 struct ethtool_ts_info info;
2147 const struct ethtool_ops *ops = dev->ethtool_ops;
2148 struct phy_device *phydev = dev->phydev;
2149
2150 memset(&info, 0, sizeof(info));
2151 info.cmd = ETHTOOL_GET_TS_INFO;
2152
2153 if (phydev && phydev->drv && phydev->drv->ts_info) {
c8f3a8c3 2154 err = phydev->drv->ts_info(phydev, &info);
c03a14e8 2155 } else if (ops->get_ts_info) {
c8f3a8c3 2156 err = ops->get_ts_info(dev, &info);
c8f3a8c3
RC		 2157 } else {
2158 info.so_timestamping =
2159 SOF_TIMESTAMPING_RX_SOFTWARE |
2160 SOF_TIMESTAMPING_SOFTWARE;
2161 info.phc_index = -1;
2162 }
2163
2164 if (err)
2165 return err;
2166
2167 if (copy_to_user(useraddr, &info, sizeof(info)))
2168 err = -EFAULT;
2169
2170 return err;
2171}
2172
2f438366
ES		 2173static int __ethtool_get_module_info(struct net_device *dev,
2174 struct ethtool_modinfo *modinfo)
2175{
2176 const struct ethtool_ops *ops = dev->ethtool_ops;
2177 struct phy_device *phydev = dev->phydev;
2178
2179 if (phydev && phydev->drv && phydev->drv->module_info)
2180 return phydev->drv->module_info(phydev, modinfo);
2181
2182 if (ops->get_module_info)
2183 return ops->get_module_info(dev, modinfo);
2184
2185 return -EOPNOTSUPP;
2186}
2187
41c3cb6d
SH		 2188static int ethtool_get_module_info(struct net_device *dev,
2189 void __user *useraddr)
2190{
2191 int ret;
2192 struct ethtool_modinfo modinfo;
41c3cb6d
SH		 2193
2194 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2195 return -EFAULT;
2196
2f438366 2197 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2198 if (ret)
2199 return ret;
2200
2201 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2202 return -EFAULT;
2203
2204 return 0;
2205}
2206
2f438366
ES		 2207static int __ethtool_get_module_eeprom(struct net_device *dev,
2208 struct ethtool_eeprom *ee, u8 *data)
2209{
2210 const struct ethtool_ops *ops = dev->ethtool_ops;
2211 struct phy_device *phydev = dev->phydev;
2212
2213 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2214 return phydev->drv->module_eeprom(phydev, ee, data);
2215
2216 if (ops->get_module_eeprom)
2217 return ops->get_module_eeprom(dev, ee, data);
2218
2219 return -EOPNOTSUPP;
2220}
2221
41c3cb6d
SH		 2222static int ethtool_get_module_eeprom(struct net_device *dev,
2223 void __user *useraddr)
2224{
2225 int ret;
2226 struct ethtool_modinfo modinfo;
41c3cb6d 2227
2f438366 2228 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2229 if (ret)
2230 return ret;
2231
2f438366
ES		 2232 return ethtool_get_any_eeprom(dev, useraddr,
2233 __ethtool_get_module_eeprom,
41c3cb6d
SH		 2234 modinfo.eeprom_len);
2235}
2236
f0db9b07
GV		 2237static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2238{
2239 switch (tuna->id) {
2240 case ETHTOOL_RX_COPYBREAK:
1255a505 2241 case ETHTOOL_TX_COPYBREAK:
f0db9b07
GV		 2242 if (tuna->len != sizeof(u32) ||
2243 tuna->type_id != ETHTOOL_TUNABLE_U32)
2244 return -EINVAL;
2245 break;
2246 default:
2247 return -EINVAL;
2248 }
2249
2250 return 0;
2251}
2252
2253static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2254{
2255 int ret;
2256 struct ethtool_tunable tuna;
2257 const struct ethtool_ops *ops = dev->ethtool_ops;
2258 void *data;
2259
2260 if (!ops->get_tunable)
2261 return -EOPNOTSUPP;
2262 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2263 return -EFAULT;
2264 ret = ethtool_tunable_valid(&tuna);
2265 if (ret)
2266 return ret;
2267 data = kmalloc(tuna.len, GFP_USER);
2268 if (!data)
2269 return -ENOMEM;
2270 ret = ops->get_tunable(dev, &tuna, data);
2271 if (ret)
2272 goto out;
2273 useraddr += sizeof(tuna);
2274 ret = -EFAULT;
2275 if (copy_to_user(useraddr, data, tuna.len))
2276 goto out;
2277 ret = 0;
2278
2279out:
2280 kfree(data);
2281 return ret;
2282}
2283
2284static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2285{
2286 int ret;
2287 struct ethtool_tunable tuna;
2288 const struct ethtool_ops *ops = dev->ethtool_ops;
2289 void *data;
2290
2291 if (!ops->set_tunable)
2292 return -EOPNOTSUPP;
2293 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2294 return -EFAULT;
2295 ret = ethtool_tunable_valid(&tuna);
2296 if (ret)
2297 return ret;
2298 data = kmalloc(tuna.len, GFP_USER);
2299 if (!data)
2300 return -ENOMEM;
2301 useraddr += sizeof(tuna);
2302 ret = -EFAULT;
2303 if (copy_from_user(data, useraddr, tuna.len))
2304 goto out;
2305 ret = ops->set_tunable(dev, &tuna, data);
2306
2307out:
2308 kfree(data);
2309 return ret;
2310}
2311
421797b1
KL		 2312static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2313 void __user *useraddr,
2314 struct ethtool_per_queue_op *per_queue_opt)
2315{
2316 u32 bit;
2317 int ret;
2318 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2319
2320 if (!dev->ethtool_ops->get_per_queue_coalesce)
2321 return -EOPNOTSUPP;
2322
2323 useraddr += sizeof(*per_queue_opt);
2324
2325 bitmap_from_u32array(queue_mask,
2326 MAX_NUM_QUEUE,
2327 per_queue_opt->queue_mask,
2328 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2329
2330 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2331 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2332
2333 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2334 if (ret != 0)
2335 return ret;
2336 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2337 return -EFAULT;
2338 useraddr += sizeof(coalesce);
2339 }
2340
2341 return 0;
2342}
2343
f38d138a
KL		 2344static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2345 void __user *useraddr,
2346 struct ethtool_per_queue_op *per_queue_opt)
2347{
2348 u32 bit;
2349 int i, ret = 0;
2350 int n_queue;
2351 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2352 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2353
2354 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2355 (!dev->ethtool_ops->get_per_queue_coalesce))
2356 return -EOPNOTSUPP;
2357
2358 useraddr += sizeof(*per_queue_opt);
2359
2360 bitmap_from_u32array(queue_mask,
2361 MAX_NUM_QUEUE,
2362 per_queue_opt->queue_mask,
2363 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2364 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2365 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2366 if (!backup)
2367 return -ENOMEM;
2368
2369 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2370 struct ethtool_coalesce coalesce;
2371
2372 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2373 if (ret != 0)
2374 goto roll_back;
2375
2376 tmp++;
2377
2378 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2379 ret = -EFAULT;
2380 goto roll_back;
2381 }
2382
2383 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2384 if (ret != 0)
2385 goto roll_back;
2386
2387 useraddr += sizeof(coalesce);
2388 }
2389
2390roll_back:
2391 if (ret != 0) {
2392 tmp = backup;
2393 for_each_set_bit(i, queue_mask, bit) {
2394 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2395 tmp++;
2396 }
2397 }
2398 kfree(backup);
2399
2400 return ret;
2401}
2402
ac2c7ad0
KL		 2403static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2404{
2405 struct ethtool_per_queue_op per_queue_opt;
2406
2407 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2408 return -EFAULT;
2409
2410 switch (per_queue_opt.sub_command) {
421797b1
KL		 2411 case ETHTOOL_GCOALESCE:
2412 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
f38d138a
KL		 2413 case ETHTOOL_SCOALESCE:
2414 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
ac2c7ad0
KL		 2415 default:
2416 return -EOPNOTSUPP;
2417 };
2418}
2419
600fed5e 2420/* The main entry point in this file. Called from net/core/dev_ioctl.c */
1da177e4 2421
881d966b 2422int dev_ethtool(struct net *net, struct ifreq *ifr)
1da177e4 2423{
881d966b 2424 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1da177e4 2425 void __user *useraddr = ifr->ifr_data;
ac2c7ad0 2426 u32 ethcmd, sub_cmd;
1da177e4 2427 int rc;
b29d3145 2428 netdev_features_t old_features;
1da177e4 2429
1da177e4
LT		 2430 if (!dev || !netif_device_present(dev))
2431 return -ENODEV;
2432
97f8aefb 2433 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1da177e4
LT		 2434 return -EFAULT;
2435
ac2c7ad0
KL		 2436 if (ethcmd == ETHTOOL_PERQUEUE) {
2437 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2438 return -EFAULT;
2439 } else {
2440 sub_cmd = ethcmd;
2441 }
75f3123c 2442 /* Allow some commands to be done by anyone */
ac2c7ad0 2443 switch (sub_cmd) {
0fdc100b 2444 case ETHTOOL_GSET:
75f3123c 2445 case ETHTOOL_GDRVINFO:
75f3123c 2446 case ETHTOOL_GMSGLVL:
2da45db2 2447 case ETHTOOL_GLINK:
75f3123c
SH		 2448 case ETHTOOL_GCOALESCE:
2449 case ETHTOOL_GRINGPARAM:
2450 case ETHTOOL_GPAUSEPARAM:
2451 case ETHTOOL_GRXCSUM:
2452 case ETHTOOL_GTXCSUM:
2453 case ETHTOOL_GSG:
f80400a2 2454 case ETHTOOL_GSSET_INFO:
75f3123c 2455 case ETHTOOL_GSTRINGS:
2da45db2 2456 case ETHTOOL_GSTATS:
f3a40945 2457 case ETHTOOL_GPHYSTATS:
75f3123c
SH		 2458 case ETHTOOL_GTSO:
2459 case ETHTOOL_GPERMADDR:
2460 case ETHTOOL_GUFO:
2461 case ETHTOOL_GGSO:
1cab819b 2462 case ETHTOOL_GGRO:
339bf024
JG		 2463 case ETHTOOL_GFLAGS:
2464 case ETHTOOL_GPFLAGS:
0853ad66 2465 case ETHTOOL_GRXFH:
59089d8d
SB		 2466 case ETHTOOL_GRXRINGS:
2467 case ETHTOOL_GRXCLSRLCNT:
2468 case ETHTOOL_GRXCLSRULE:
2469 case ETHTOOL_GRXCLSRLALL:
2da45db2 2470 case ETHTOOL_GRXFHINDIR:
3de0b592 2471 case ETHTOOL_GRSSH:
5455c699 2472 case ETHTOOL_GFEATURES:
2da45db2 2473 case ETHTOOL_GCHANNELS:
c8f3a8c3 2474 case ETHTOOL_GET_TS_INFO:
2da45db2 2475 case ETHTOOL_GEEE:
f0db9b07 2476 case ETHTOOL_GTUNABLE:
75f3123c
SH		 2477 break;
2478 default:
5e1fccc0 2479 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
75f3123c
SH		 2480 return -EPERM;
2481 }
2482
97f8aefb 2483 if (dev->ethtool_ops->begin) {
2484 rc = dev->ethtool_ops->begin(dev);
2485 if (rc < 0)
1da177e4 2486 return rc;
97f8aefb 2487 }
d8a33ac4
SH		 2488 old_features = dev->features;
2489
1da177e4
LT		 2490 switch (ethcmd) {
2491 case ETHTOOL_GSET:
2492 rc = ethtool_get_settings(dev, useraddr);
2493 break;
2494 case ETHTOOL_SSET:
2495 rc = ethtool_set_settings(dev, useraddr);
2496 break;
2497 case ETHTOOL_GDRVINFO:
2498 rc = ethtool_get_drvinfo(dev, useraddr);
1da177e4
LT		 2499 break;
2500 case ETHTOOL_GREGS:
2501 rc = ethtool_get_regs(dev, useraddr);
2502 break;
2503 case ETHTOOL_GWOL:
2504 rc = ethtool_get_wol(dev, useraddr);
2505 break;
2506 case ETHTOOL_SWOL:
2507 rc = ethtool_set_wol(dev, useraddr);
2508 break;
2509 case ETHTOOL_GMSGLVL:
13c99b24
JG		 2510 rc = ethtool_get_value(dev, useraddr, ethcmd,
2511 dev->ethtool_ops->get_msglevel);
1da177e4
LT		 2512 break;
2513 case ETHTOOL_SMSGLVL:
13c99b24
JG		 2514 rc = ethtool_set_value_void(dev, useraddr,
2515 dev->ethtool_ops->set_msglevel);
1da177e4 2516 break;
80f12ecc
YM		 2517 case ETHTOOL_GEEE:
2518 rc = ethtool_get_eee(dev, useraddr);
2519 break;
2520 case ETHTOOL_SEEE:
2521 rc = ethtool_set_eee(dev, useraddr);
2522 break;
1da177e4
LT		 2523 case ETHTOOL_NWAY_RST:
2524 rc = ethtool_nway_reset(dev);
2525 break;
2526 case ETHTOOL_GLINK:
e596e6e4 2527 rc = ethtool_get_link(dev, useraddr);
1da177e4
LT		 2528 break;
2529 case ETHTOOL_GEEPROM:
2530 rc = ethtool_get_eeprom(dev, useraddr);
2531 break;
2532 case ETHTOOL_SEEPROM:
2533 rc = ethtool_set_eeprom(dev, useraddr);
2534 break;
2535 case ETHTOOL_GCOALESCE:
2536 rc = ethtool_get_coalesce(dev, useraddr);
2537 break;
2538 case ETHTOOL_SCOALESCE:
2539 rc = ethtool_set_coalesce(dev, useraddr);
2540 break;
2541 case ETHTOOL_GRINGPARAM:
2542 rc = ethtool_get_ringparam(dev, useraddr);
2543 break;
2544 case ETHTOOL_SRINGPARAM:
2545 rc = ethtool_set_ringparam(dev, useraddr);
2546 break;
2547 case ETHTOOL_GPAUSEPARAM:
2548 rc = ethtool_get_pauseparam(dev, useraddr);
2549 break;
2550 case ETHTOOL_SPAUSEPARAM:
2551 rc = ethtool_set_pauseparam(dev, useraddr);
2552 break;
1da177e4
LT		 2553 case ETHTOOL_TEST:
2554 rc = ethtool_self_test(dev, useraddr);
2555 break;
2556 case ETHTOOL_GSTRINGS:
2557 rc = ethtool_get_strings(dev, useraddr);
2558 break;
2559 case ETHTOOL_PHYS_ID:
2560 rc = ethtool_phys_id(dev, useraddr);
2561 break;
2562 case ETHTOOL_GSTATS:
2563 rc = ethtool_get_stats(dev, useraddr);
2564 break;
a6f9a705
JW		 2565 case ETHTOOL_GPERMADDR:
2566 rc = ethtool_get_perm_addr(dev, useraddr);
2567 break;
3ae7c0b2 2568 case ETHTOOL_GFLAGS:
13c99b24 2569 rc = ethtool_get_value(dev, useraddr, ethcmd,
bc5787c6 2570 __ethtool_get_flags);
3ae7c0b2
JG		 2571 break;
2572 case ETHTOOL_SFLAGS:
da8ac86c 2573 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3ae7c0b2 2574 break;
339bf024 2575 case ETHTOOL_GPFLAGS:
13c99b24
JG		 2576 rc = ethtool_get_value(dev, useraddr, ethcmd,
2577 dev->ethtool_ops->get_priv_flags);
339bf024
JG		 2578 break;
2579 case ETHTOOL_SPFLAGS:
13c99b24
JG		 2580 rc = ethtool_set_value(dev, useraddr,
2581 dev->ethtool_ops->set_priv_flags);
339bf024 2582 break;
0853ad66 2583 case ETHTOOL_GRXFH:
59089d8d
SB		 2584 case ETHTOOL_GRXRINGS:
2585 case ETHTOOL_GRXCLSRLCNT:
2586 case ETHTOOL_GRXCLSRULE:
2587 case ETHTOOL_GRXCLSRLALL:
bf988435 2588 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
0853ad66
SB		 2589 break;
2590 case ETHTOOL_SRXFH:
59089d8d
SB		 2591 case ETHTOOL_SRXCLSRLDEL:
2592 case ETHTOOL_SRXCLSRLINS:
bf988435 2593 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
0853ad66 2594 break;
05c6a8d7
AK		 2595 case ETHTOOL_FLASHDEV:
2596 rc = ethtool_flash_device(dev, useraddr);
2597 break;
d73d3a8c
BH		 2598 case ETHTOOL_RESET:
2599 rc = ethtool_reset(dev, useraddr);
2600 break;
723b2f57
JG		 2601 case ETHTOOL_GSSET_INFO:
2602 rc = ethtool_get_sset_info(dev, useraddr);
2603 break;
a5b6ee29
BH		 2604 case ETHTOOL_GRXFHINDIR:
2605 rc = ethtool_get_rxfh_indir(dev, useraddr);
2606 break;
2607 case ETHTOOL_SRXFHINDIR:
2608 rc = ethtool_set_rxfh_indir(dev, useraddr);
2609 break;
3de0b592
VD		 2610 case ETHTOOL_GRSSH:
2611 rc = ethtool_get_rxfh(dev, useraddr);
2612 break;
2613 case ETHTOOL_SRSSH:
2614 rc = ethtool_set_rxfh(dev, useraddr);
2615 break;
5455c699
MM		 2616 case ETHTOOL_GFEATURES:
2617 rc = ethtool_get_features(dev, useraddr);
2618 break;
2619 case ETHTOOL_SFEATURES:
2620 rc = ethtool_set_features(dev, useraddr);
2621 break;
0a417704 2622 case ETHTOOL_GTXCSUM:
e83d360d 2623 case ETHTOOL_GRXCSUM:
0a417704
MM		 2624 case ETHTOOL_GSG:
2625 case ETHTOOL_GTSO:
2626 case ETHTOOL_GUFO:
2627 case ETHTOOL_GGSO:
2628 case ETHTOOL_GGRO:
2629 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2630 break;
2631 case ETHTOOL_STXCSUM:
e83d360d 2632 case ETHTOOL_SRXCSUM:
0a417704
MM		 2633 case ETHTOOL_SSG:
2634 case ETHTOOL_STSO:
2635 case ETHTOOL_SUFO:
2636 case ETHTOOL_SGSO:
2637 case ETHTOOL_SGRO:
2638 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2639 break;
8b5933c3 2640 case ETHTOOL_GCHANNELS:
2641 rc = ethtool_get_channels(dev, useraddr);
2642 break;
2643 case ETHTOOL_SCHANNELS:
2644 rc = ethtool_set_channels(dev, useraddr);
2645 break;
29dd54b7
AC		 2646 case ETHTOOL_SET_DUMP:
2647 rc = ethtool_set_dump(dev, useraddr);
2648 break;
2649 case ETHTOOL_GET_DUMP_FLAG:
2650 rc = ethtool_get_dump_flag(dev, useraddr);
2651 break;
2652 case ETHTOOL_GET_DUMP_DATA:
2653 rc = ethtool_get_dump_data(dev, useraddr);
2654 break;
c8f3a8c3
RC		 2655 case ETHTOOL_GET_TS_INFO:
2656 rc = ethtool_get_ts_info(dev, useraddr);
2657 break;
41c3cb6d
SH		 2658 case ETHTOOL_GMODULEINFO:
2659 rc = ethtool_get_module_info(dev, useraddr);
2660 break;
2661 case ETHTOOL_GMODULEEEPROM:
2662 rc = ethtool_get_module_eeprom(dev, useraddr);
2663 break;
f0db9b07
GV		 2664 case ETHTOOL_GTUNABLE:
2665 rc = ethtool_get_tunable(dev, useraddr);
2666 break;
2667 case ETHTOOL_STUNABLE:
2668 rc = ethtool_set_tunable(dev, useraddr);
2669 break;
f3a40945
AL		 2670 case ETHTOOL_GPHYSTATS:
2671 rc = ethtool_get_phy_stats(dev, useraddr);
2672 break;
ac2c7ad0
KL		 2673 case ETHTOOL_PERQUEUE:
2674 rc = ethtool_set_per_queue(dev, useraddr);
2675 break;
3f1ac7a7
DD		 2676 case ETHTOOL_GLINKSETTINGS:
2677 rc = ethtool_get_link_ksettings(dev, useraddr);
2678 break;
2679 case ETHTOOL_SLINKSETTINGS:
2680 rc = ethtool_set_link_ksettings(dev, useraddr);
2681 break;
1da177e4 2682 default:
61a44b9c 2683 rc = -EOPNOTSUPP;
1da177e4 2684 }
4ec93edb 2685
e71a4783 2686 if (dev->ethtool_ops->complete)
1da177e4 2687 dev->ethtool_ops->complete(dev);
d8a33ac4
SH		 2688
2689 if (old_features != dev->features)
2690 netdev_features_change(dev);
2691
1da177e4 2692 return rc;
1da177e4 2693}
ubuntu-zesty-kernel mirror