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net: ethtool: don't require CAP_NET_ADMIN for ETHTOOL_GLINKSETTINGS
[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",
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",
d0290214 105 [NETIF_F_BUSY_POLL_BIT] = "busy-poll",
1c78c64e 106 [NETIF_F_HW_TC_BIT] = "hw-tc-offload",
9d921549
MM		 107};
108
892311f6
EP		 109static const char
110rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
111 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
112 [ETH_RSS_HASH_XOR_BIT] = "xor",
113};
114
a4244b0c
HHZ		 115static const char
116tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
117 [ETHTOOL_ID_UNSPEC] = "Unspec",
118 [ETHTOOL_RX_COPYBREAK] = "rx-copybreak",
119 [ETHTOOL_TX_COPYBREAK] = "tx-copybreak",
120};
121
5455c699
MM		 122static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
123{
124 struct ethtool_gfeatures cmd = {
125 .cmd = ETHTOOL_GFEATURES,
126 .size = ETHTOOL_DEV_FEATURE_WORDS,
127 };
475414f6 128 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
5455c699
MM		 129 u32 __user *sizeaddr;
130 u32 copy_size;
475414f6
MM		 131 int i;
132
133 /* in case feature bits run out again */
09da71b1 134 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
475414f6
MM		 135
136 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 137 features[i].available = (u32)(dev->hw_features >> (32 * i));
138 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
139 features[i].active = (u32)(dev->features >> (32 * i));
140 features[i].never_changed =
141 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
475414f6 142 }
5455c699
MM		 143
144 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
145 if (get_user(copy_size, sizeaddr))
146 return -EFAULT;
147
148 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
149 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
150
151 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
152 return -EFAULT;
153 useraddr += sizeof(cmd);
154 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
155 return -EFAULT;
156
157 return 0;
158}
159
160static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
161{
162 struct ethtool_sfeatures cmd;
163 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
475414f6
MM		 164 netdev_features_t wanted = 0, valid = 0;
165 int i, ret = 0;
5455c699
MM		 166
167 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
168 return -EFAULT;
169 useraddr += sizeof(cmd);
170
171 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
172 return -EINVAL;
173
174 if (copy_from_user(features, useraddr, sizeof(features)))
175 return -EFAULT;
176
475414f6 177 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 178 valid |= (netdev_features_t)features[i].valid << (32 * i);
179 wanted |= (netdev_features_t)features[i].requested << (32 * i);
475414f6
MM		 180 }
181
182 if (valid & ~NETIF_F_ETHTOOL_BITS)
5455c699
MM		 183 return -EINVAL;
184
475414f6
MM		 185 if (valid & ~dev->hw_features) {
186 valid &= dev->hw_features;
5455c699
MM		 187 ret |= ETHTOOL_F_UNSUPPORTED;
188 }
189
475414f6
MM		 190 dev->wanted_features &= ~valid;
191 dev->wanted_features |= wanted & valid;
6cb6a27c 192 __netdev_update_features(dev);
5455c699 193
475414f6 194 if ((dev->wanted_features ^ dev->features) & valid)
5455c699
MM		 195 ret |= ETHTOOL_F_WISH;
196
197 return ret;
198}
199
f3a40945
AL		 200static int phy_get_sset_count(struct phy_device *phydev)
201{
202 int ret;
203
204 if (phydev->drv->get_sset_count &&
205 phydev->drv->get_strings &&
206 phydev->drv->get_stats) {
207 mutex_lock(&phydev->lock);
208 ret = phydev->drv->get_sset_count(phydev);
209 mutex_unlock(&phydev->lock);
210
211 return ret;
212 }
213
214 return -EOPNOTSUPP;
215}
216
340ae165
MM		 217static int __ethtool_get_sset_count(struct net_device *dev, int sset)
218{
219 const struct ethtool_ops *ops = dev->ethtool_ops;
220
5455c699
MM		 221 if (sset == ETH_SS_FEATURES)
222 return ARRAY_SIZE(netdev_features_strings);
223
892311f6
EP		 224 if (sset == ETH_SS_RSS_HASH_FUNCS)
225 return ARRAY_SIZE(rss_hash_func_strings);
226
a4244b0c
HHZ		 227 if (sset == ETH_SS_TUNABLES)
228 return ARRAY_SIZE(tunable_strings);
229
f3a40945
AL		 230 if (sset == ETH_SS_PHY_STATS) {
231 if (dev->phydev)
232 return phy_get_sset_count(dev->phydev);
233 else
234 return -EOPNOTSUPP;
235 }
236
c03a14e8 237 if (ops->get_sset_count && ops->get_strings)
340ae165
MM		 238 return ops->get_sset_count(dev, sset);
239 else
240 return -EOPNOTSUPP;
241}
242
243static void __ethtool_get_strings(struct net_device *dev,
244 u32 stringset, u8 *data)
245{
246 const struct ethtool_ops *ops = dev->ethtool_ops;
247
5455c699
MM		 248 if (stringset == ETH_SS_FEATURES)
249 memcpy(data, netdev_features_strings,
250 sizeof(netdev_features_strings));
892311f6
EP		 251 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
252 memcpy(data, rss_hash_func_strings,
253 sizeof(rss_hash_func_strings));
a4244b0c
HHZ		 254 else if (stringset == ETH_SS_TUNABLES)
255 memcpy(data, tunable_strings, sizeof(tunable_strings));
f3a40945
AL		 256 else if (stringset == ETH_SS_PHY_STATS) {
257 struct phy_device *phydev = dev->phydev;
258
259 if (phydev) {
260 mutex_lock(&phydev->lock);
261 phydev->drv->get_strings(phydev, data);
262 mutex_unlock(&phydev->lock);
263 } else {
264 return;
265 }
266 } else
5455c699
MM		 267 /* ops->get_strings is valid because checked earlier */
268 ops->get_strings(dev, stringset, data);
340ae165
MM		 269}
270
c8f44aff 271static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
0a417704
MM		 272{
273 /* feature masks of legacy discrete ethtool ops */
274
275 switch (eth_cmd) {
276 case ETHTOOL_GTXCSUM:
277 case ETHTOOL_STXCSUM:
a188222b 278 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
e83d360d
MM		 279 case ETHTOOL_GRXCSUM:
280 case ETHTOOL_SRXCSUM:
281 return NETIF_F_RXCSUM;
0a417704
MM		 282 case ETHTOOL_GSG:
283 case ETHTOOL_SSG:
284 return NETIF_F_SG;
285 case ETHTOOL_GTSO:
286 case ETHTOOL_STSO:
287 return NETIF_F_ALL_TSO;
288 case ETHTOOL_GUFO:
289 case ETHTOOL_SUFO:
290 return NETIF_F_UFO;
291 case ETHTOOL_GGSO:
292 case ETHTOOL_SGSO:
293 return NETIF_F_GSO;
294 case ETHTOOL_GGRO:
295 case ETHTOOL_SGRO:
296 return NETIF_F_GRO;
297 default:
298 BUG();
299 }
300}
301
0a417704
MM		 302static int ethtool_get_one_feature(struct net_device *dev,
303 char __user *useraddr, u32 ethcmd)
304{
c8f44aff 305 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
0a417704
MM		 306 struct ethtool_value edata = {
307 .cmd = ethcmd,
86794881 308 .data = !!(dev->features & mask),
0a417704 309 };
0a417704 310
0a417704
MM		 311 if (copy_to_user(useraddr, &edata, sizeof(edata)))
312 return -EFAULT;
313 return 0;
314}
315
0a417704
MM		 316static int ethtool_set_one_feature(struct net_device *dev,
317 void __user *useraddr, u32 ethcmd)
318{
319 struct ethtool_value edata;
c8f44aff 320 netdev_features_t mask;
0a417704
MM		 321
322 if (copy_from_user(&edata, useraddr, sizeof(edata)))
323 return -EFAULT;
324
86794881
MM		 325 mask = ethtool_get_feature_mask(ethcmd);
326 mask &= dev->hw_features;
bc5787c6
MM		 327 if (!mask)
328 return -EOPNOTSUPP;
86794881 329
bc5787c6
MM		 330 if (edata.data)
331 dev->wanted_features |= mask;
332 else
333 dev->wanted_features &= ~mask;
86794881 334
bc5787c6 335 __netdev_update_features(dev);
86794881 336
bc5787c6
MM		 337 return 0;
338}
339
02b3a552
MM		 340#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
341 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
f646968f
PM		 342#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
343 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
344 NETIF_F_RXHASH)
bc5787c6
MM		 345
346static u32 __ethtool_get_flags(struct net_device *dev)
347{
02b3a552
MM		 348 u32 flags = 0;
349
8a73125c
DF		 350 if (dev->features & NETIF_F_LRO)
351 flags |= ETH_FLAG_LRO;
352 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
353 flags |= ETH_FLAG_RXVLAN;
354 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
355 flags |= ETH_FLAG_TXVLAN;
356 if (dev->features & NETIF_F_NTUPLE)
357 flags |= ETH_FLAG_NTUPLE;
358 if (dev->features & NETIF_F_RXHASH)
359 flags |= ETH_FLAG_RXHASH;
02b3a552
MM		 360
361 return flags;
0a417704
MM		 362}
363
bc5787c6 364static int __ethtool_set_flags(struct net_device *dev, u32 data)
da8ac86c 365{
c8f44aff 366 netdev_features_t features = 0, changed;
da8ac86c 367
02b3a552 368 if (data & ~ETH_ALL_FLAGS)
da8ac86c
MM		 369 return -EINVAL;
370
8a73125c
DF		 371 if (data & ETH_FLAG_LRO)
372 features |= NETIF_F_LRO;
373 if (data & ETH_FLAG_RXVLAN)
374 features |= NETIF_F_HW_VLAN_CTAG_RX;
375 if (data & ETH_FLAG_TXVLAN)
376 features |= NETIF_F_HW_VLAN_CTAG_TX;
377 if (data & ETH_FLAG_NTUPLE)
378 features |= NETIF_F_NTUPLE;
379 if (data & ETH_FLAG_RXHASH)
380 features |= NETIF_F_RXHASH;
02b3a552 381
da8ac86c 382 /* allow changing only bits set in hw_features */
02b3a552 383 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
da8ac86c
MM		 384 if (changed & ~dev->hw_features)
385 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
386
387 dev->wanted_features =
02b3a552 388 (dev->wanted_features & ~changed) | (features & changed);
da8ac86c 389
6cb6a27c 390 __netdev_update_features(dev);
da8ac86c
MM		 391
392 return 0;
393}
394
6d62b4d5
PR		 395void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
396 u32 legacy_u32)
3f1ac7a7
DD		 397{
398 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
399 dst[0] = legacy_u32;
400}
6d62b4d5 401EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
3f1ac7a7
DD		 402
403/* return false if src had higher bits set. lower bits always updated. */
6d62b4d5
PR		 404bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
405 const unsigned long *src)
3f1ac7a7
DD		 406{
407 bool retval = true;
408
409 /* TODO: following test will soon always be true */
410 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
411 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
412
413 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
414 bitmap_fill(ext, 32);
415 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
416 if (bitmap_intersects(ext, src,
417 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
418 /* src mask goes beyond bit 31 */
419 retval = false;
420 }
421 }
422 *legacy_u32 = src[0];
423 return retval;
424}
6d62b4d5 425EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
3f1ac7a7
DD		 426
427/* return false if legacy contained non-0 deprecated fields
428 * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
429 */
430static bool
431convert_legacy_settings_to_link_ksettings(
432 struct ethtool_link_ksettings *link_ksettings,
433 const struct ethtool_cmd *legacy_settings)
434{
435 bool retval = true;
436
437 memset(link_ksettings, 0, sizeof(*link_ksettings));
438
439 /* This is used to tell users that driver is still using these
440 * deprecated legacy fields, and they should not use
441 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
442 */
443 if (legacy_settings->transceiver ||
444 legacy_settings->maxtxpkt ||
445 legacy_settings->maxrxpkt)
446 retval = false;
447
6d62b4d5 448 ethtool_convert_legacy_u32_to_link_mode(
3f1ac7a7
DD		 449 link_ksettings->link_modes.supported,
450 legacy_settings->supported);
6d62b4d5 451 ethtool_convert_legacy_u32_to_link_mode(
3f1ac7a7
DD		 452 link_ksettings->link_modes.advertising,
453 legacy_settings->advertising);
6d62b4d5 454 ethtool_convert_legacy_u32_to_link_mode(
3f1ac7a7
DD		 455 link_ksettings->link_modes.lp_advertising,
456 legacy_settings->lp_advertising);
457 link_ksettings->base.speed
458 = ethtool_cmd_speed(legacy_settings);
459 link_ksettings->base.duplex
460 = legacy_settings->duplex;
461 link_ksettings->base.port
462 = legacy_settings->port;
463 link_ksettings->base.phy_address
464 = legacy_settings->phy_address;
465 link_ksettings->base.autoneg
466 = legacy_settings->autoneg;
467 link_ksettings->base.mdio_support
468 = legacy_settings->mdio_support;
469 link_ksettings->base.eth_tp_mdix
470 = legacy_settings->eth_tp_mdix;
471 link_ksettings->base.eth_tp_mdix_ctrl
472 = legacy_settings->eth_tp_mdix_ctrl;
473 return retval;
474}
475
476/* return false if ksettings link modes had higher bits
477 * set. legacy_settings always updated (best effort)
478 */
479static bool
480convert_link_ksettings_to_legacy_settings(
481 struct ethtool_cmd *legacy_settings,
482 const struct ethtool_link_ksettings *link_ksettings)
483{
484 bool retval = true;
485
486 memset(legacy_settings, 0, sizeof(*legacy_settings));
487 /* this also clears the deprecated fields in legacy structure:
488 * __u8 transceiver;
489 * __u32 maxtxpkt;
490 * __u32 maxrxpkt;
491 */
492
6d62b4d5 493 retval &= ethtool_convert_link_mode_to_legacy_u32(
3f1ac7a7
DD		 494 &legacy_settings->supported,
495 link_ksettings->link_modes.supported);
6d62b4d5 496 retval &= ethtool_convert_link_mode_to_legacy_u32(
3f1ac7a7
DD		 497 &legacy_settings->advertising,
498 link_ksettings->link_modes.advertising);
6d62b4d5 499 retval &= ethtool_convert_link_mode_to_legacy_u32(
3f1ac7a7
DD		 500 &legacy_settings->lp_advertising,
501 link_ksettings->link_modes.lp_advertising);
502 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
503 legacy_settings->duplex
504 = link_ksettings->base.duplex;
505 legacy_settings->port
506 = link_ksettings->base.port;
507 legacy_settings->phy_address
508 = link_ksettings->base.phy_address;
509 legacy_settings->autoneg
510 = link_ksettings->base.autoneg;
511 legacy_settings->mdio_support
512 = link_ksettings->base.mdio_support;
513 legacy_settings->eth_tp_mdix
514 = link_ksettings->base.eth_tp_mdix;
515 legacy_settings->eth_tp_mdix_ctrl
516 = link_ksettings->base.eth_tp_mdix_ctrl;
517 return retval;
518}
519
520/* number of 32-bit words to store the user's link mode bitmaps */
521#define __ETHTOOL_LINK_MODE_MASK_NU32 \
522 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
523
524/* layout of the struct passed from/to userland */
525struct ethtool_link_usettings {
526 struct ethtool_link_settings base;
527 struct {
528 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
529 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
530 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
531 } link_modes;
532};
533
534/* Internal kernel helper to query a device ethtool_link_settings.
535 *
536 * Backward compatibility note: for compatibility with legacy drivers
537 * that implement only the ethtool_cmd API, this has to work with both
538 * drivers implementing get_link_ksettings API and drivers
539 * implementing get_settings API. When drivers implement get_settings
540 * and report ethtool_cmd deprecated fields
541 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
542 * because the resulting struct ethtool_link_settings does not report them.
543 */
544int __ethtool_get_link_ksettings(struct net_device *dev,
545 struct ethtool_link_ksettings *link_ksettings)
546{
547 int err;
548 struct ethtool_cmd cmd;
549
550 ASSERT_RTNL();
551
552 if (dev->ethtool_ops->get_link_ksettings) {
553 memset(link_ksettings, 0, sizeof(*link_ksettings));
554 return dev->ethtool_ops->get_link_ksettings(dev,
555 link_ksettings);
556 }
557
558 /* driver doesn't support %ethtool_link_ksettings API. revert to
559 * legacy %ethtool_cmd API, unless it's not supported either.
560 * TODO: remove when ethtool_ops::get_settings disappears internally
561 */
3237fc63
DD		 562 if (!dev->ethtool_ops->get_settings)
563 return -EOPNOTSUPP;
564
565 memset(&cmd, 0, sizeof(cmd));
566 cmd.cmd = ETHTOOL_GSET;
567 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 568 if (err < 0)
569 return err;
570
571 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
572 */
573 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
574 return err;
575}
576EXPORT_SYMBOL(__ethtool_get_link_ksettings);
577
578/* convert ethtool_link_usettings in user space to a kernel internal
579 * ethtool_link_ksettings. return 0 on success, errno on error.
580 */
581static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
582 const void __user *from)
583{
584 struct ethtool_link_usettings link_usettings;
585
586 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
587 return -EFAULT;
588
589 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
590 bitmap_from_u32array(to->link_modes.supported,
591 __ETHTOOL_LINK_MODE_MASK_NBITS,
592 link_usettings.link_modes.supported,
593 __ETHTOOL_LINK_MODE_MASK_NU32);
594 bitmap_from_u32array(to->link_modes.advertising,
595 __ETHTOOL_LINK_MODE_MASK_NBITS,
596 link_usettings.link_modes.advertising,
597 __ETHTOOL_LINK_MODE_MASK_NU32);
598 bitmap_from_u32array(to->link_modes.lp_advertising,
599 __ETHTOOL_LINK_MODE_MASK_NBITS,
600 link_usettings.link_modes.lp_advertising,
601 __ETHTOOL_LINK_MODE_MASK_NU32);
602
603 return 0;
604}
605
606/* convert a kernel internal ethtool_link_ksettings to
607 * ethtool_link_usettings in user space. return 0 on success, errno on
608 * error.
609 */
610static int
611store_link_ksettings_for_user(void __user *to,
612 const struct ethtool_link_ksettings *from)
613{
614 struct ethtool_link_usettings link_usettings;
615
616 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
617 bitmap_to_u32array(link_usettings.link_modes.supported,
618 __ETHTOOL_LINK_MODE_MASK_NU32,
619 from->link_modes.supported,
620 __ETHTOOL_LINK_MODE_MASK_NBITS);
621 bitmap_to_u32array(link_usettings.link_modes.advertising,
622 __ETHTOOL_LINK_MODE_MASK_NU32,
623 from->link_modes.advertising,
624 __ETHTOOL_LINK_MODE_MASK_NBITS);
625 bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
626 __ETHTOOL_LINK_MODE_MASK_NU32,
627 from->link_modes.lp_advertising,
628 __ETHTOOL_LINK_MODE_MASK_NBITS);
629
630 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
631 return -EFAULT;
632
633 return 0;
634}
635
636/* Query device for its ethtool_link_settings.
637 *
638 * Backward compatibility note: this function must fail when driver
639 * does not implement ethtool::get_link_ksettings, even if legacy
640 * ethtool_ops::get_settings is implemented. This tells new versions
641 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
642 * this driver, so that they can correctly access the ethtool_cmd
643 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
644 * implements ethtool_ops::get_settings anymore.
645 */
646static int ethtool_get_link_ksettings(struct net_device *dev,
647 void __user *useraddr)
648{
649 int err = 0;
650 struct ethtool_link_ksettings link_ksettings;
651
652 ASSERT_RTNL();
653
654 if (!dev->ethtool_ops->get_link_ksettings)
655 return -EOPNOTSUPP;
656
657 /* handle bitmap nbits handshake */
658 if (copy_from_user(&link_ksettings.base, useraddr,
659 sizeof(link_ksettings.base)))
660 return -EFAULT;
661
662 if (__ETHTOOL_LINK_MODE_MASK_NU32
663 != link_ksettings.base.link_mode_masks_nwords) {
664 /* wrong link mode nbits requested */
665 memset(&link_ksettings, 0, sizeof(link_ksettings));
793cf87d 666 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
3f1ac7a7
DD		 667 /* send back number of words required as negative val */
668 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
669 "need too many bits for link modes!");
670 link_ksettings.base.link_mode_masks_nwords
671 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
672
673 /* copy the base fields back to user, not the link
674 * mode bitmaps
675 */
676 if (copy_to_user(useraddr, &link_ksettings.base,
677 sizeof(link_ksettings.base)))
678 return -EFAULT;
679
680 return 0;
681 }
682
683 /* handshake successful: user/kernel agree on
684 * link_mode_masks_nwords
685 */
686
687 memset(&link_ksettings, 0, sizeof(link_ksettings));
688 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
689 if (err < 0)
690 return err;
691
692 /* make sure we tell the right values to user */
693 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
694 link_ksettings.base.link_mode_masks_nwords
695 = __ETHTOOL_LINK_MODE_MASK_NU32;
696
697 return store_link_ksettings_for_user(useraddr, &link_ksettings);
698}
699
700/* Update device ethtool_link_settings.
701 *
702 * Backward compatibility note: this function must fail when driver
703 * does not implement ethtool::set_link_ksettings, even if legacy
704 * ethtool_ops::set_settings is implemented. This tells new versions
705 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
706 * this driver, so that they can correctly update the ethtool_cmd
707 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
708 * implements ethtool_ops::get_settings anymore.
709 */
710static int ethtool_set_link_ksettings(struct net_device *dev,
711 void __user *useraddr)
712{
713 int err;
714 struct ethtool_link_ksettings link_ksettings;
715
716 ASSERT_RTNL();
717
718 if (!dev->ethtool_ops->set_link_ksettings)
719 return -EOPNOTSUPP;
720
721 /* make sure nbits field has expected value */
722 if (copy_from_user(&link_ksettings.base, useraddr,
723 sizeof(link_ksettings.base)))
724 return -EFAULT;
725
726 if (__ETHTOOL_LINK_MODE_MASK_NU32
727 != link_ksettings.base.link_mode_masks_nwords)
728 return -EINVAL;
729
730 /* copy the whole structure, now that we know it has expected
731 * format
732 */
733 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
734 if (err)
735 return err;
736
737 /* re-check nwords field, just in case */
738 if (__ETHTOOL_LINK_MODE_MASK_NU32
739 != link_ksettings.base.link_mode_masks_nwords)
740 return -EINVAL;
741
742 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
743}
744
3f1ac7a7
DD		 745static void
746warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
747{
748 char name[sizeof(current->comm)];
749
750 pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
751 get_task_comm(name, current), details);
752}
753
754/* Query device for its ethtool_cmd settings.
755 *
756 * Backward compatibility note: for compatibility with legacy ethtool,
757 * this has to work with both drivers implementing get_link_ksettings
758 * API and drivers implementing get_settings API. When drivers
759 * implement get_link_ksettings and report higher link mode bits, a
760 * kernel warning is logged once (with name of 1st driver/device) to
761 * recommend user to upgrade ethtool, but the command is successful
762 * (only the lower link mode bits reported back to user).
763 */
4bc71cb9
JP		 764static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
765{
4bc71cb9
JP		 766 struct ethtool_cmd cmd;
767
3f1ac7a7
DD		 768 ASSERT_RTNL();
769
770 if (dev->ethtool_ops->get_link_ksettings) {
771 /* First, use link_ksettings API if it is supported */
772 int err;
773 struct ethtool_link_ksettings link_ksettings;
774
775 memset(&link_ksettings, 0, sizeof(link_ksettings));
776 err = dev->ethtool_ops->get_link_ksettings(dev,
777 &link_ksettings);
778 if (err < 0)
779 return err;
780 if (!convert_link_ksettings_to_legacy_settings(&cmd,
781 &link_ksettings))
782 warn_incomplete_ethtool_legacy_settings_conversion(
783 "link modes are only partially reported");
784
785 /* send a sensible cmd tag back to user */
786 cmd.cmd = ETHTOOL_GSET;
787 } else {
3f1ac7a7
DD		 788 /* driver doesn't support %ethtool_link_ksettings
789 * API. revert to legacy %ethtool_cmd API, unless it's
790 * not supported either.
791 */
3237fc63
DD		 792 int err;
793
794 if (!dev->ethtool_ops->get_settings)
795 return -EOPNOTSUPP;
796
797 memset(&cmd, 0, sizeof(cmd));
798 cmd.cmd = ETHTOOL_GSET;
799 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 800 if (err < 0)
801 return err;
802 }
1da177e4
LT		 803
804 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
805 return -EFAULT;
3f1ac7a7 806
1da177e4
LT		 807 return 0;
808}
809
3f1ac7a7
DD		 810/* Update device link settings with given ethtool_cmd.
811 *
812 * Backward compatibility note: for compatibility with legacy ethtool,
813 * this has to work with both drivers implementing set_link_ksettings
814 * API and drivers implementing set_settings API. When drivers
815 * implement set_link_ksettings and user's request updates deprecated
816 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
817 * warning is logged once (with name of 1st driver/device) to
818 * recommend user to upgrade ethtool, and the request is rejected.
819 */
1da177e4
LT		 820static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
821{
822 struct ethtool_cmd cmd;
823
3f1ac7a7 824 ASSERT_RTNL();
1da177e4
LT		 825
826 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
827 return -EFAULT;
828
3f1ac7a7
DD		 829 /* first, try new %ethtool_link_ksettings API. */
830 if (dev->ethtool_ops->set_link_ksettings) {
831 struct ethtool_link_ksettings link_ksettings;
832
833 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
834 &cmd))
835 return -EINVAL;
836
837 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
838 link_ksettings.base.link_mode_masks_nwords
839 = __ETHTOOL_LINK_MODE_MASK_NU32;
840 return dev->ethtool_ops->set_link_ksettings(dev,
841 &link_ksettings);
842 }
843
844 /* legacy %ethtool_cmd API */
845
846 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
847 * disappears internally
848 */
849
850 if (!dev->ethtool_ops->set_settings)
851 return -EOPNOTSUPP;
852
1da177e4
LT		 853 return dev->ethtool_ops->set_settings(dev, &cmd);
854}
855
97f8aefb 856static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
857 void __user *useraddr)
1da177e4
LT		 858{
859 struct ethtool_drvinfo info;
76fd8593 860 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 861
1da177e4
LT		 862 memset(&info, 0, sizeof(info));
863 info.cmd = ETHTOOL_GDRVINFO;
c03a14e8 864 if (ops->get_drvinfo) {
01414802
BH		 865 ops->get_drvinfo(dev, &info);
866 } else if (dev->dev.parent && dev->dev.parent->driver) {
867 strlcpy(info.bus_info, dev_name(dev->dev.parent),
868 sizeof(info.bus_info));
869 strlcpy(info.driver, dev->dev.parent->driver->name,
870 sizeof(info.driver));
871 } else {
872 return -EOPNOTSUPP;
873 }
1da177e4 874
723b2f57
JG		 875 /*
876 * this method of obtaining string set info is deprecated;
d17792eb 877 * Use ETHTOOL_GSSET_INFO instead.
723b2f57 878 */
c03a14e8 879 if (ops->get_sset_count) {
ff03d49f
JG		 880 int rc;
881
882 rc = ops->get_sset_count(dev, ETH_SS_TEST);
883 if (rc >= 0)
884 info.testinfo_len = rc;
885 rc = ops->get_sset_count(dev, ETH_SS_STATS);
886 if (rc >= 0)
887 info.n_stats = rc;
339bf024
JG		 888 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
889 if (rc >= 0)
890 info.n_priv_flags = rc;
ff03d49f 891 }
c03a14e8 892 if (ops->get_regs_len)
1da177e4 893 info.regdump_len = ops->get_regs_len(dev);
c03a14e8 894 if (ops->get_eeprom_len)
1da177e4
LT		 895 info.eedump_len = ops->get_eeprom_len(dev);
896
897 if (copy_to_user(useraddr, &info, sizeof(info)))
898 return -EFAULT;
899 return 0;
900}
901
f5c445ed 902static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
97f8aefb 903 void __user *useraddr)
723b2f57
JG		 904{
905 struct ethtool_sset_info info;
723b2f57
JG		 906 u64 sset_mask;
907 int i, idx = 0, n_bits = 0, ret, rc;
908 u32 *info_buf = NULL;
909
723b2f57
JG		 910 if (copy_from_user(&info, useraddr, sizeof(info)))
911 return -EFAULT;
912
913 /* store copy of mask, because we zero struct later on */
914 sset_mask = info.sset_mask;
915 if (!sset_mask)
916 return 0;
917
918 /* calculate size of return buffer */
d17792eb 919 n_bits = hweight64(sset_mask);
723b2f57
JG		 920
921 memset(&info, 0, sizeof(info));
922 info.cmd = ETHTOOL_GSSET_INFO;
923
924 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
925 if (!info_buf)
926 return -ENOMEM;
927
928 /*
929 * fill return buffer based on input bitmask and successful
930 * get_sset_count return
931 */
932 for (i = 0; i < 64; i++) {
933 if (!(sset_mask & (1ULL << i)))
934 continue;
935
340ae165 936 rc = __ethtool_get_sset_count(dev, i);
723b2f57
JG		 937 if (rc >= 0) {
938 info.sset_mask |= (1ULL << i);
939 info_buf[idx++] = rc;
940 }
941 }
942
943 ret = -EFAULT;
944 if (copy_to_user(useraddr, &info, sizeof(info)))
945 goto out;
946
947 useraddr += offsetof(struct ethtool_sset_info, data);
948 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
949 goto out;
950
951 ret = 0;
952
953out:
954 kfree(info_buf);
955 return ret;
956}
957
97f8aefb 958static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
bf988435 959 u32 cmd, void __user *useraddr)
0853ad66 960{
bf988435
BH		 961 struct ethtool_rxnfc info;
962 size_t info_size = sizeof(info);
55664f32 963 int rc;
0853ad66 964
59089d8d 965 if (!dev->ethtool_ops->set_rxnfc)
0853ad66
SB		 966 return -EOPNOTSUPP;
967
bf988435
BH		 968 /* struct ethtool_rxnfc was originally defined for
969 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
970 * members. User-space might still be using that
971 * definition. */
972 if (cmd == ETHTOOL_SRXFH)
973 info_size = (offsetof(struct ethtool_rxnfc, data) +
974 sizeof(info.data));
975
976 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 977 return -EFAULT;
978
55664f32
BH		 979 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
980 if (rc)
981 return rc;
982
983 if (cmd == ETHTOOL_SRXCLSRLINS &&
984 copy_to_user(useraddr, &info, info_size))
985 return -EFAULT;
986
987 return 0;
0853ad66
SB		 988}
989
97f8aefb 990static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
bf988435 991 u32 cmd, void __user *useraddr)
0853ad66
SB		 992{
993 struct ethtool_rxnfc info;
bf988435 994 size_t info_size = sizeof(info);
59089d8d
SB		 995 const struct ethtool_ops *ops = dev->ethtool_ops;
996 int ret;
997 void *rule_buf = NULL;
0853ad66 998
59089d8d 999 if (!ops->get_rxnfc)
0853ad66
SB		 1000 return -EOPNOTSUPP;
1001
bf988435
BH		 1002 /* struct ethtool_rxnfc was originally defined for
1003 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1004 * members. User-space might still be using that
1005 * definition. */
1006 if (cmd == ETHTOOL_GRXFH)
1007 info_size = (offsetof(struct ethtool_rxnfc, data) +
1008 sizeof(info.data));
1009
1010 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 1011 return -EFAULT;
1012
59089d8d
SB		 1013 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1014 if (info.rule_cnt > 0) {
db048b69 1015 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
ae6df5f9 1016 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
db048b69 1017 GFP_USER);
59089d8d
SB		 1018 if (!rule_buf)
1019 return -ENOMEM;
1020 }
1021 }
0853ad66 1022
59089d8d
SB		 1023 ret = ops->get_rxnfc(dev, &info, rule_buf);
1024 if (ret < 0)
1025 goto err_out;
1026
1027 ret = -EFAULT;
bf988435 1028 if (copy_to_user(useraddr, &info, info_size))
59089d8d
SB		 1029 goto err_out;
1030
1031 if (rule_buf) {
1032 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1033 if (copy_to_user(useraddr, rule_buf,
1034 info.rule_cnt * sizeof(u32)))
1035 goto err_out;
1036 }
1037 ret = 0;
1038
1039err_out:
c9caceca 1040 kfree(rule_buf);
59089d8d
SB		 1041
1042 return ret;
0853ad66
SB		 1043}
1044
3de0b592
VD		 1045static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1046 struct ethtool_rxnfc *rx_rings,
1047 u32 size)
1048{
fb95cd8d 1049 int i;
3de0b592
VD		 1050
1051 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
fb95cd8d 1052 return -EFAULT;
3de0b592
VD		 1053
1054 /* Validate ring indices */
fb95cd8d
BH		 1055 for (i = 0; i < size; i++)
1056 if (indir[i] >= rx_rings->data)
1057 return -EINVAL;
1058
1059 return 0;
3de0b592
VD		 1060}
1061
ba905f5e 1062u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
960fb622
ED		 1063
1064void netdev_rss_key_fill(void *buffer, size_t len)
1065{
1066 BUG_ON(len > sizeof(netdev_rss_key));
1067 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1068 memcpy(buffer, netdev_rss_key, len);
1069}
1070EXPORT_SYMBOL(netdev_rss_key_fill);
1071
d4ab4286
KJ		 1072static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1073{
1074 u32 dev_size, current_max = 0;
1075 u32 *indir;
1076 int ret;
1077
1078 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1079 !dev->ethtool_ops->get_rxfh)
1080 return -EOPNOTSUPP;
1081 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1082 if (dev_size == 0)
1083 return -EOPNOTSUPP;
1084
1085 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1086 if (!indir)
1087 return -ENOMEM;
1088
1089 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1090 if (ret)
1091 goto out;
1092
1093 while (dev_size--)
1094 current_max = max(current_max, indir[dev_size]);
1095
1096 *max = current_max;
1097
1098out:
1099 kfree(indir);
1100 return ret;
1101}
1102
a5b6ee29
BH		 1103static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1104 void __user *useraddr)
1105{
7850f63f
BH		 1106 u32 user_size, dev_size;
1107 u32 *indir;
a5b6ee29
BH		 1108 int ret;
1109
7850f63f 1110 if (!dev->ethtool_ops->get_rxfh_indir_size ||
fe62d001 1111 !dev->ethtool_ops->get_rxfh)
7850f63f
BH		 1112 return -EOPNOTSUPP;
1113 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1114 if (dev_size == 0)
a5b6ee29
BH		 1115 return -EOPNOTSUPP;
1116
7850f63f 1117 if (copy_from_user(&user_size,
a5b6ee29 1118 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1119 sizeof(user_size)))
a5b6ee29
BH		 1120 return -EFAULT;
1121
7850f63f
BH		 1122 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1123 &dev_size, sizeof(dev_size)))
1124 return -EFAULT;
1125
1126 /* If the user buffer size is 0, this is just a query for the
1127 * device table size. Otherwise, if it's smaller than the
1128 * device table size it's an error.
1129 */
1130 if (user_size < dev_size)
1131 return user_size == 0 ? 0 : -EINVAL;
1132
1133 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1134 if (!indir)
1135 return -ENOMEM;
1136
892311f6 1137 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
a5b6ee29
BH		 1138 if (ret)
1139 goto out;
1140
7850f63f
BH		 1141 if (copy_to_user(useraddr +
1142 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1143 indir, dev_size * sizeof(indir[0])))
a5b6ee29
BH		 1144 ret = -EFAULT;
1145
1146out:
1147 kfree(indir);
1148 return ret;
1149}
1150
1151static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1152 void __user *useraddr)
1153{
7850f63f
BH		 1154 struct ethtool_rxnfc rx_rings;
1155 u32 user_size, dev_size, i;
1156 u32 *indir;
c03a14e8 1157 const struct ethtool_ops *ops = dev->ethtool_ops;
a5b6ee29 1158 int ret;
3de0b592 1159 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
a5b6ee29 1160
fe62d001 1161 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
c03a14e8 1162 !ops->get_rxnfc)
7850f63f 1163 return -EOPNOTSUPP;
c03a14e8
JP		 1164
1165 dev_size = ops->get_rxfh_indir_size(dev);
7850f63f 1166 if (dev_size == 0)
a5b6ee29
BH		 1167 return -EOPNOTSUPP;
1168
7850f63f 1169 if (copy_from_user(&user_size,
a5b6ee29 1170 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1171 sizeof(user_size)))
a5b6ee29
BH		 1172 return -EFAULT;
1173
278bc429 1174 if (user_size != 0 && user_size != dev_size)
7850f63f
BH		 1175 return -EINVAL;
1176
1177 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1178 if (!indir)
1179 return -ENOMEM;
1180
7850f63f 1181 rx_rings.cmd = ETHTOOL_GRXRINGS;
c03a14e8 1182 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
7850f63f
BH		 1183 if (ret)
1184 goto out;
278bc429
BH		 1185
1186 if (user_size == 0) {
1187 for (i = 0; i < dev_size; i++)
1188 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1189 } else {
3de0b592
VD		 1190 ret = ethtool_copy_validate_indir(indir,
1191 useraddr + ringidx_offset,
1192 &rx_rings,
1193 dev_size);
1194 if (ret)
1195 goto out;
1196 }
1197
892311f6 1198 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
d4ab4286
KJ		 1199 if (ret)
1200 goto out;
1201
1202 /* indicate whether rxfh was set to default */
1203 if (user_size == 0)
1204 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1205 else
1206 dev->priv_flags |= IFF_RXFH_CONFIGURED;
3de0b592
VD		 1207
1208out:
1209 kfree(indir);
1210 return ret;
1211}
1212
1213static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1214 void __user *useraddr)
1215{
1216 int ret;
1217 const struct ethtool_ops *ops = dev->ethtool_ops;
f062a384 1218 u32 user_indir_size, user_key_size;
3de0b592 1219 u32 dev_indir_size = 0, dev_key_size = 0;
f062a384 1220 struct ethtool_rxfh rxfh;
3de0b592 1221 u32 total_size;
f062a384 1222 u32 indir_bytes;
3de0b592 1223 u32 *indir = NULL;
892311f6 1224 u8 dev_hfunc = 0;
3de0b592
VD		 1225 u8 *hkey = NULL;
1226 u8 *rss_config;
1227
892311f6 1228 if (!ops->get_rxfh)
3de0b592
VD		 1229 return -EOPNOTSUPP;
1230
1231 if (ops->get_rxfh_indir_size)
1232 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592
VD		 1233 if (ops->get_rxfh_key_size)
1234 dev_key_size = ops->get_rxfh_key_size(dev);
1235
f062a384 1236 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592 1237 return -EFAULT;
f062a384
BH		 1238 user_indir_size = rxfh.indir_size;
1239 user_key_size = rxfh.key_size;
3de0b592 1240
f062a384 1241 /* Check that reserved fields are 0 for now */
892311f6
EP		 1242 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1243 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1244 return -EINVAL;
1245
1246 rxfh.indir_size = dev_indir_size;
1247 rxfh.key_size = dev_key_size;
1248 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
3de0b592
VD		 1249 return -EFAULT;
1250
3de0b592
VD		 1251 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1252 (user_key_size && (user_key_size != dev_key_size)))
1253 return -EINVAL;
1254
1255 indir_bytes = user_indir_size * sizeof(indir[0]);
1256 total_size = indir_bytes + user_key_size;
1257 rss_config = kzalloc(total_size, GFP_USER);
1258 if (!rss_config)
1259 return -ENOMEM;
1260
1261 if (user_indir_size)
1262 indir = (u32 *)rss_config;
1263
1264 if (user_key_size)
1265 hkey = rss_config + indir_bytes;
1266
892311f6
EP		 1267 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1268 if (ret)
1269 goto out;
3de0b592 1270
892311f6
EP		 1271 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1272 &dev_hfunc, sizeof(rxfh.hfunc))) {
1273 ret = -EFAULT;
1274 } else if (copy_to_user(useraddr +
1275 offsetof(struct ethtool_rxfh, rss_config[0]),
1276 rss_config, total_size)) {
1277 ret = -EFAULT;
1278 }
1279out:
3de0b592
VD		 1280 kfree(rss_config);
1281
1282 return ret;
1283}
1284
1285static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1286 void __user *useraddr)
1287{
1288 int ret;
1289 const struct ethtool_ops *ops = dev->ethtool_ops;
1290 struct ethtool_rxnfc rx_rings;
f062a384
BH		 1291 struct ethtool_rxfh rxfh;
1292 u32 dev_indir_size = 0, dev_key_size = 0, i;
3de0b592
VD		 1293 u32 *indir = NULL, indir_bytes = 0;
1294 u8 *hkey = NULL;
1295 u8 *rss_config;
3de0b592
VD		 1296 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1297
892311f6 1298 if (!ops->get_rxnfc || !ops->set_rxfh)
3de0b592
VD		 1299 return -EOPNOTSUPP;
1300
1301 if (ops->get_rxfh_indir_size)
1302 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592 1303 if (ops->get_rxfh_key_size)
d340c862 1304 dev_key_size = ops->get_rxfh_key_size(dev);
3de0b592 1305
f062a384 1306 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592
VD		 1307 return -EFAULT;
1308
f062a384 1309 /* Check that reserved fields are 0 for now */
892311f6
EP		 1310 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1311 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1312 return -EINVAL;
1313
892311f6
EP		 1314 /* If either indir, hash key or function is valid, proceed further.
1315 * Must request at least one change: indir size, hash key or function.
3de0b592 1316 */
f062a384
BH		 1317 if ((rxfh.indir_size &&
1318 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1319 rxfh.indir_size != dev_indir_size) ||
1320 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1321 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
892311f6 1322 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
3de0b592
VD		 1323 return -EINVAL;
1324
f062a384 1325 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
3de0b592
VD		 1326 indir_bytes = dev_indir_size * sizeof(indir[0]);
1327
f062a384 1328 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
3de0b592
VD		 1329 if (!rss_config)
1330 return -ENOMEM;
1331
1332 rx_rings.cmd = ETHTOOL_GRXRINGS;
1333 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1334 if (ret)
1335 goto out;
1336
f062a384
BH		 1337 /* rxfh.indir_size == 0 means reset the indir table to default.
1338 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
3de0b592 1339 */
f062a384
BH		 1340 if (rxfh.indir_size &&
1341 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
3de0b592
VD		 1342 indir = (u32 *)rss_config;
1343 ret = ethtool_copy_validate_indir(indir,
1344 useraddr + rss_cfg_offset,
1345 &rx_rings,
f062a384 1346 rxfh.indir_size);
3de0b592 1347 if (ret)
7850f63f 1348 goto out;
f062a384 1349 } else if (rxfh.indir_size == 0) {
3de0b592
VD		 1350 indir = (u32 *)rss_config;
1351 for (i = 0; i < dev_indir_size; i++)
1352 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1353 }
278bc429 1354
f062a384 1355 if (rxfh.key_size) {
3de0b592
VD		 1356 hkey = rss_config + indir_bytes;
1357 if (copy_from_user(hkey,
1358 useraddr + rss_cfg_offset + indir_bytes,
f062a384 1359 rxfh.key_size)) {
3de0b592
VD		 1360 ret = -EFAULT;
1361 goto out;
278bc429 1362 }
7850f63f
BH		 1363 }
1364
892311f6 1365 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
d4ab4286
KJ		 1366 if (ret)
1367 goto out;
1368
1369 /* indicate whether rxfh was set to default */
1370 if (rxfh.indir_size == 0)
1371 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1372 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1373 dev->priv_flags |= IFF_RXFH_CONFIGURED;
a5b6ee29
BH		 1374
1375out:
3de0b592 1376 kfree(rss_config);
a5b6ee29
BH		 1377 return ret;
1378}
1379
1da177e4
LT		 1380static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1381{
1382 struct ethtool_regs regs;
76fd8593 1383 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 1384 void *regbuf;
1385 int reglen, ret;
1386
1387 if (!ops->get_regs || !ops->get_regs_len)
1388 return -EOPNOTSUPP;
1389
1390 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1391 return -EFAULT;
1392
1393 reglen = ops->get_regs_len(dev);
1394 if (regs.len > reglen)
1395 regs.len = reglen;
1396
b7c7d01a 1397 regbuf = vzalloc(reglen);
67ae7cf1 1398 if (reglen && !regbuf)
1da177e4
LT		 1399 return -ENOMEM;
1400
1401 ops->get_regs(dev, &regs, regbuf);
1402
1403 ret = -EFAULT;
1404 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1405 goto out;
1406 useraddr += offsetof(struct ethtool_regs, data);
67ae7cf1 1407 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1da177e4
LT		 1408 goto out;
1409 ret = 0;
1410
1411 out:
a77f5db3 1412 vfree(regbuf);
1da177e4
LT		 1413 return ret;
1414}
1415
d73d3a8c
BH		 1416static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1417{
1418 struct ethtool_value reset;
1419 int ret;
1420
1421 if (!dev->ethtool_ops->reset)
1422 return -EOPNOTSUPP;
1423
1424 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1425 return -EFAULT;
1426
1427 ret = dev->ethtool_ops->reset(dev, &reset.data);
1428 if (ret)
1429 return ret;
1430
1431 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1432 return -EFAULT;
1433 return 0;
1434}
1435
1da177e4
LT		 1436static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1437{
8e557421 1438 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1da177e4
LT		 1439
1440 if (!dev->ethtool_ops->get_wol)
1441 return -EOPNOTSUPP;
1442
1443 dev->ethtool_ops->get_wol(dev, &wol);
1444
1445 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1446 return -EFAULT;
1447 return 0;
1448}
1449
1450static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1451{
1452 struct ethtool_wolinfo wol;
1453
1454 if (!dev->ethtool_ops->set_wol)
1455 return -EOPNOTSUPP;
1456
1457 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1458 return -EFAULT;
1459
1460 return dev->ethtool_ops->set_wol(dev, &wol);
1461}
1462
80f12ecc
YM		 1463static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1464{
1465 struct ethtool_eee edata;
1466 int rc;
1467
1468 if (!dev->ethtool_ops->get_eee)
1469 return -EOPNOTSUPP;
1470
1471 memset(&edata, 0, sizeof(struct ethtool_eee));
1472 edata.cmd = ETHTOOL_GEEE;
1473 rc = dev->ethtool_ops->get_eee(dev, &edata);
1474
1475 if (rc)
1476 return rc;
1477
1478 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1479 return -EFAULT;
1480
1481 return 0;
1482}
1483
1484static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1485{
1486 struct ethtool_eee edata;
1487
1488 if (!dev->ethtool_ops->set_eee)
1489 return -EOPNOTSUPP;
1490
1491 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1492 return -EFAULT;
1493
1494 return dev->ethtool_ops->set_eee(dev, &edata);
1495}
1496
1da177e4
LT		 1497static int ethtool_nway_reset(struct net_device *dev)
1498{
1499 if (!dev->ethtool_ops->nway_reset)
1500 return -EOPNOTSUPP;
1501
1502 return dev->ethtool_ops->nway_reset(dev);
1503}
1504
e596e6e4
BH		 1505static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1506{
1507 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1508
1509 if (!dev->ethtool_ops->get_link)
1510 return -EOPNOTSUPP;
1511
1512 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1513
1514 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1515 return -EFAULT;
1516 return 0;
1517}
1518
081d094e
BH		 1519static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1520 int (*getter)(struct net_device *,
1521 struct ethtool_eeprom *, u8 *),
1522 u32 total_len)
1da177e4
LT		 1523{
1524 struct ethtool_eeprom eeprom;
b131dd5d
MSB		 1525 void __user *userbuf = useraddr + sizeof(eeprom);
1526 u32 bytes_remaining;
1da177e4 1527 u8 *data;
b131dd5d 1528 int ret = 0;
1da177e4 1529
1da177e4
LT		 1530 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1531 return -EFAULT;
1532
1533 /* Check for wrap and zero */
1534 if (eeprom.offset + eeprom.len <= eeprom.offset)
1535 return -EINVAL;
1536
1537 /* Check for exceeding total eeprom len */
081d094e 1538 if (eeprom.offset + eeprom.len > total_len)
1da177e4
LT		 1539 return -EINVAL;
1540
b131dd5d 1541 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1542 if (!data)
1543 return -ENOMEM;
1544
b131dd5d
MSB		 1545 bytes_remaining = eeprom.len;
1546 while (bytes_remaining > 0) {
1547 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1548
081d094e 1549 ret = getter(dev, &eeprom, data);
b131dd5d
MSB		 1550 if (ret)
1551 break;
1552 if (copy_to_user(userbuf, data, eeprom.len)) {
1553 ret = -EFAULT;
1554 break;
1555 }
1556 userbuf += eeprom.len;
1557 eeprom.offset += eeprom.len;
1558 bytes_remaining -= eeprom.len;
1559 }
1da177e4 1560
c5835df9
MSB		 1561 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1562 eeprom.offset -= eeprom.len;
1563 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1564 ret = -EFAULT;
1565
1da177e4
LT		 1566 kfree(data);
1567 return ret;
1568}
1569
081d094e
BH		 1570static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1571{
1572 const struct ethtool_ops *ops = dev->ethtool_ops;
1573
e0fb6fb6
GR		 1574 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1575 !ops->get_eeprom_len(dev))
081d094e
BH		 1576 return -EOPNOTSUPP;
1577
1578 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1579 ops->get_eeprom_len(dev));
1580}
1581
1da177e4
LT		 1582static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1583{
1584 struct ethtool_eeprom eeprom;
76fd8593 1585 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 1586 void __user *userbuf = useraddr + sizeof(eeprom);
1587 u32 bytes_remaining;
1da177e4 1588 u8 *data;
b131dd5d 1589 int ret = 0;
1da177e4 1590
e0fb6fb6
GR		 1591 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1592 !ops->get_eeprom_len(dev))
1da177e4
LT		 1593 return -EOPNOTSUPP;
1594
1595 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1596 return -EFAULT;
1597
1598 /* Check for wrap and zero */
1599 if (eeprom.offset + eeprom.len <= eeprom.offset)
1600 return -EINVAL;
1601
1602 /* Check for exceeding total eeprom len */
1603 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1604 return -EINVAL;
1605
b131dd5d 1606 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1607 if (!data)
1608 return -ENOMEM;
1609
b131dd5d
MSB		 1610 bytes_remaining = eeprom.len;
1611 while (bytes_remaining > 0) {
1612 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1613
1614 if (copy_from_user(data, userbuf, eeprom.len)) {
1615 ret = -EFAULT;
1616 break;
1617 }
1618 ret = ops->set_eeprom(dev, &eeprom, data);
1619 if (ret)
1620 break;
1621 userbuf += eeprom.len;
1622 eeprom.offset += eeprom.len;
1623 bytes_remaining -= eeprom.len;
1624 }
1da177e4 1625
1da177e4
LT		 1626 kfree(data);
1627 return ret;
1628}
1629
97f8aefb 1630static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1631 void __user *useraddr)
1da177e4 1632{
8e557421 1633 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1da177e4
LT		 1634
1635 if (!dev->ethtool_ops->get_coalesce)
1636 return -EOPNOTSUPP;
1637
1638 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1639
1640 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1641 return -EFAULT;
1642 return 0;
1643}
1644
97f8aefb 1645static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1646 void __user *useraddr)
1da177e4
LT		 1647{
1648 struct ethtool_coalesce coalesce;
1649
fa04ae5c 1650 if (!dev->ethtool_ops->set_coalesce)
1da177e4
LT		 1651 return -EOPNOTSUPP;
1652
1653 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1654 return -EFAULT;
1655
1656 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1657}
1658
1659static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1660{
8e557421 1661 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1da177e4
LT		 1662
1663 if (!dev->ethtool_ops->get_ringparam)
1664 return -EOPNOTSUPP;
1665
1666 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1667
1668 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1669 return -EFAULT;
1670 return 0;
1671}
1672
1673static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1674{
1675 struct ethtool_ringparam ringparam;
1676
1677 if (!dev->ethtool_ops->set_ringparam)
1678 return -EOPNOTSUPP;
1679
1680 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1681 return -EFAULT;
1682
1683 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1684}
1685
8b5933c3 1686static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1687 void __user *useraddr)
1688{
1689 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1690
1691 if (!dev->ethtool_ops->get_channels)
1692 return -EOPNOTSUPP;
1693
1694 dev->ethtool_ops->get_channels(dev, &channels);
1695
1696 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1697 return -EFAULT;
1698 return 0;
1699}
1700
1701static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1702 void __user *useraddr)
1703{
8bf36862 1704 struct ethtool_channels channels, max;
d4ab4286 1705 u32 max_rx_in_use = 0;
8b5933c3 1706
8bf36862 1707 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
8b5933c3 1708 return -EOPNOTSUPP;
1709
1710 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1711 return -EFAULT;
1712
8bf36862
KJ		 1713 dev->ethtool_ops->get_channels(dev, &max);
1714
1715 /* ensure new counts are within the maximums */
1716 if ((channels.rx_count > max.max_rx) ||
1717 (channels.tx_count > max.max_tx) ||
1718 (channels.combined_count > max.max_combined) ||
1719 (channels.other_count > max.max_other))
1720 return -EINVAL;
1721
d4ab4286
KJ		 1722 /* ensure the new Rx count fits within the configured Rx flow
1723 * indirection table settings */
1724 if (netif_is_rxfh_configured(dev) &&
1725 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1726 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1727 return -EINVAL;
1728
8b5933c3 1729 return dev->ethtool_ops->set_channels(dev, &channels);
1730}
1731
1da177e4
LT		 1732static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1733{
1734 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1735
1736 if (!dev->ethtool_ops->get_pauseparam)
1737 return -EOPNOTSUPP;
1738
1739 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1740
1741 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1742 return -EFAULT;
1743 return 0;
1744}
1745
1746static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1747{
1748 struct ethtool_pauseparam pauseparam;
1749
e1b90c41 1750 if (!dev->ethtool_ops->set_pauseparam)
1da177e4
LT		 1751 return -EOPNOTSUPP;
1752
1753 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1754 return -EFAULT;
1755
1756 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1757}
1758
1da177e4
LT		 1759static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1760{
1761 struct ethtool_test test;
76fd8593 1762 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1763 u64 *data;
ff03d49f 1764 int ret, test_len;
1da177e4 1765
a9828ec6 1766 if (!ops->self_test || !ops->get_sset_count)
1da177e4
LT		 1767 return -EOPNOTSUPP;
1768
a9828ec6 1769 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
ff03d49f
JG		 1770 if (test_len < 0)
1771 return test_len;
1772 WARN_ON(test_len == 0);
1773
1da177e4
LT		 1774 if (copy_from_user(&test, useraddr, sizeof(test)))
1775 return -EFAULT;
1776
ff03d49f
JG		 1777 test.len = test_len;
1778 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1da177e4
LT		 1779 if (!data)
1780 return -ENOMEM;
1781
1782 ops->self_test(dev, &test, data);
1783
1784 ret = -EFAULT;
1785 if (copy_to_user(useraddr, &test, sizeof(test)))
1786 goto out;
1787 useraddr += sizeof(test);
1788 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1789 goto out;
1790 ret = 0;
1791
1792 out:
1793 kfree(data);
1794 return ret;
1795}
1796
1797static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1798{
1799 struct ethtool_gstrings gstrings;
1da177e4
LT		 1800 u8 *data;
1801 int ret;
1802
1da177e4
LT		 1803 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1804 return -EFAULT;
1805
340ae165 1806 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
a9828ec6
BH		 1807 if (ret < 0)
1808 return ret;
1809
1810 gstrings.len = ret;
1da177e4 1811
077cb37f 1812 data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
1da177e4
LT		 1813 if (!data)
1814 return -ENOMEM;
1815
340ae165 1816 __ethtool_get_strings(dev, gstrings.string_set, data);
1da177e4
LT		 1817
1818 ret = -EFAULT;
1819 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1820 goto out;
1821 useraddr += sizeof(gstrings);
1822 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1823 goto out;
1824 ret = 0;
1825
340ae165 1826out:
1da177e4
LT		 1827 kfree(data);
1828 return ret;
1829}
1830
1831static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1832{
1833 struct ethtool_value id;
68f512f2 1834 static bool busy;
c03a14e8 1835 const struct ethtool_ops *ops = dev->ethtool_ops;
68f512f2 1836 int rc;
1da177e4 1837
c03a14e8 1838 if (!ops->set_phys_id)
1da177e4
LT		 1839 return -EOPNOTSUPP;
1840
68f512f2
BH		 1841 if (busy)
1842 return -EBUSY;
1843
1da177e4
LT		 1844 if (copy_from_user(&id, useraddr, sizeof(id)))
1845 return -EFAULT;
1846
c03a14e8 1847 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
fce55922 1848 if (rc < 0)
68f512f2
BH		 1849 return rc;
1850
1851 /* Drop the RTNL lock while waiting, but prevent reentry or
1852 * removal of the device.
1853 */
1854 busy = true;
1855 dev_hold(dev);
1856 rtnl_unlock();
1857
1858 if (rc == 0) {
1859 /* Driver will handle this itself */
1860 schedule_timeout_interruptible(
143780c6 1861 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
68f512f2 1862 } else {
fce55922
AB		 1863 /* Driver expects to be called at twice the frequency in rc */
1864 int n = rc * 2, i, interval = HZ / n;
1865
1866 /* Count down seconds */
68f512f2 1867 do {
fce55922
AB		 1868 /* Count down iterations per second */
1869 i = n;
1870 do {
1871 rtnl_lock();
c03a14e8 1872 rc = ops->set_phys_id(dev,
fce55922
AB		 1873 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1874 rtnl_unlock();
1875 if (rc)
1876 break;
1877 schedule_timeout_interruptible(interval);
1878 } while (!signal_pending(current) && --i != 0);
68f512f2
BH		 1879 } while (!signal_pending(current) &&
1880 (id.data == 0 || --id.data != 0));
1881 }
1882
1883 rtnl_lock();
1884 dev_put(dev);
1885 busy = false;
1886
c03a14e8 1887 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
68f512f2 1888 return rc;
1da177e4
LT		 1889}
1890
1891static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1892{
1893 struct ethtool_stats stats;
76fd8593 1894 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1895 u64 *data;
ff03d49f 1896 int ret, n_stats;
1da177e4 1897
a9828ec6 1898 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1da177e4
LT		 1899 return -EOPNOTSUPP;
1900
a9828ec6 1901 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
ff03d49f
JG		 1902 if (n_stats < 0)
1903 return n_stats;
1904 WARN_ON(n_stats == 0);
1905
1da177e4
LT		 1906 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1907 return -EFAULT;
1908
ff03d49f
JG		 1909 stats.n_stats = n_stats;
1910 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1da177e4
LT		 1911 if (!data)
1912 return -ENOMEM;
1913
1914 ops->get_ethtool_stats(dev, &stats, data);
1915
1916 ret = -EFAULT;
1917 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1918 goto out;
1919 useraddr += sizeof(stats);
1920 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1921 goto out;
1922 ret = 0;
1923
1924 out:
1925 kfree(data);
1926 return ret;
1927}
1928
f3a40945
AL		 1929static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1930{
1931 struct ethtool_stats stats;
1932 struct phy_device *phydev = dev->phydev;
1933 u64 *data;
1934 int ret, n_stats;
1935
1936 if (!phydev)
1937 return -EOPNOTSUPP;
1938
1939 n_stats = phy_get_sset_count(phydev);
1940
1941 if (n_stats < 0)
1942 return n_stats;
1943 WARN_ON(n_stats == 0);
1944
1945 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1946 return -EFAULT;
1947
1948 stats.n_stats = n_stats;
1949 data = kmalloc_array(n_stats, sizeof(u64), GFP_USER);
1950 if (!data)
1951 return -ENOMEM;
1952
1953 mutex_lock(&phydev->lock);
1954 phydev->drv->get_stats(phydev, &stats, data);
1955 mutex_unlock(&phydev->lock);
1956
1957 ret = -EFAULT;
1958 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1959 goto out;
1960 useraddr += sizeof(stats);
1961 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1962 goto out;
1963 ret = 0;
1964
1965 out:
1966 kfree(data);
1967 return ret;
1968}
1969
0bf0519d 1970static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
a6f9a705
JW		 1971{
1972 struct ethtool_perm_addr epaddr;
a6f9a705 1973
313674af 1974 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
a6f9a705
JW		 1975 return -EFAULT;
1976
313674af
MW		 1977 if (epaddr.size < dev->addr_len)
1978 return -ETOOSMALL;
1979 epaddr.size = dev->addr_len;
a6f9a705 1980
a6f9a705 1981 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
313674af 1982 return -EFAULT;
a6f9a705 1983 useraddr += sizeof(epaddr);
313674af
MW		 1984 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1985 return -EFAULT;
1986 return 0;
a6f9a705
JW		 1987}
1988
13c99b24
JG		 1989static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1990 u32 cmd, u32 (*actor)(struct net_device *))
3ae7c0b2 1991{
8e557421 1992 struct ethtool_value edata = { .cmd = cmd };
3ae7c0b2 1993
13c99b24 1994 if (!actor)
3ae7c0b2
JG		 1995 return -EOPNOTSUPP;
1996
13c99b24 1997 edata.data = actor(dev);
3ae7c0b2
JG		 1998
1999 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2000 return -EFAULT;
2001 return 0;
2002}
2003
13c99b24
JG		 2004static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2005 void (*actor)(struct net_device *, u32))
3ae7c0b2
JG		 2006{
2007 struct ethtool_value edata;
2008
13c99b24 2009 if (!actor)
3ae7c0b2
JG		 2010 return -EOPNOTSUPP;
2011
2012 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2013 return -EFAULT;
2014
13c99b24 2015 actor(dev, edata.data);
339bf024
JG		 2016 return 0;
2017}
2018
13c99b24
JG		 2019static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2020 int (*actor)(struct net_device *, u32))
339bf024
JG		 2021{
2022 struct ethtool_value edata;
2023
13c99b24 2024 if (!actor)
339bf024
JG		 2025 return -EOPNOTSUPP;
2026
2027 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2028 return -EFAULT;
2029
13c99b24 2030 return actor(dev, edata.data);
339bf024
JG		 2031}
2032
97f8aefb 2033static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2034 char __user *useraddr)
05c6a8d7
AK		 2035{
2036 struct ethtool_flash efl;
2037
2038 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2039 return -EFAULT;
2040
2041 if (!dev->ethtool_ops->flash_device)
2042 return -EOPNOTSUPP;
2043
786f5281
BH		 2044 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2045
05c6a8d7
AK		 2046 return dev->ethtool_ops->flash_device(dev, &efl);
2047}
2048
29dd54b7
AC		 2049static int ethtool_set_dump(struct net_device *dev,
2050 void __user *useraddr)
2051{
2052 struct ethtool_dump dump;
2053
2054 if (!dev->ethtool_ops->set_dump)
2055 return -EOPNOTSUPP;
2056
2057 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2058 return -EFAULT;
2059
2060 return dev->ethtool_ops->set_dump(dev, &dump);
2061}
2062
2063static int ethtool_get_dump_flag(struct net_device *dev,
2064 void __user *useraddr)
2065{
2066 int ret;
2067 struct ethtool_dump dump;
2068 const struct ethtool_ops *ops = dev->ethtool_ops;
2069
c03a14e8 2070 if (!ops->get_dump_flag)
29dd54b7
AC		 2071 return -EOPNOTSUPP;
2072
2073 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2074 return -EFAULT;
2075
2076 ret = ops->get_dump_flag(dev, &dump);
2077 if (ret)
2078 return ret;
2079
2080 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2081 return -EFAULT;
2082 return 0;
2083}
2084
2085static int ethtool_get_dump_data(struct net_device *dev,
2086 void __user *useraddr)
2087{
2088 int ret;
2089 __u32 len;
2090 struct ethtool_dump dump, tmp;
2091 const struct ethtool_ops *ops = dev->ethtool_ops;
2092 void *data = NULL;
2093
c03a14e8 2094 if (!ops->get_dump_data || !ops->get_dump_flag)
29dd54b7
AC		 2095 return -EOPNOTSUPP;
2096
2097 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2098 return -EFAULT;
2099
2100 memset(&tmp, 0, sizeof(tmp));
2101 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2102 ret = ops->get_dump_flag(dev, &tmp);
2103 if (ret)
2104 return ret;
2105
c590b5e2 2106 len = min(tmp.len, dump.len);
29dd54b7
AC		 2107 if (!len)
2108 return -EFAULT;
2109
c590b5e2
MS		 2110 /* Don't ever let the driver think there's more space available
2111 * than it requested with .get_dump_flag().
2112 */
2113 dump.len = len;
2114
2115 /* Always allocate enough space to hold the whole thing so that the
2116 * driver does not need to check the length and bother with partial
2117 * dumping.
2118 */
29dd54b7
AC		 2119 data = vzalloc(tmp.len);
2120 if (!data)
2121 return -ENOMEM;
2122 ret = ops->get_dump_data(dev, &dump, data);
2123 if (ret)
2124 goto out;
2125
c590b5e2
MS		 2126 /* There are two sane possibilities:
2127 * 1. The driver's .get_dump_data() does not touch dump.len.
2128 * 2. Or it may set dump.len to how much it really writes, which
2129 * should be tmp.len (or len if it can do a partial dump).
2130 * In any case respond to userspace with the actual length of data
2131 * it's receiving.
2132 */
2133 WARN_ON(dump.len != len && dump.len != tmp.len);
2134 dump.len = len;
2135
29dd54b7
AC		 2136 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2137 ret = -EFAULT;
2138 goto out;
2139 }
2140 useraddr += offsetof(struct ethtool_dump, data);
2141 if (copy_to_user(useraddr, data, len))
2142 ret = -EFAULT;
2143out:
2144 vfree(data);
2145 return ret;
2146}
2147
c8f3a8c3
RC		 2148static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2149{
2150 int err = 0;
2151 struct ethtool_ts_info info;
2152 const struct ethtool_ops *ops = dev->ethtool_ops;
2153 struct phy_device *phydev = dev->phydev;
2154
2155 memset(&info, 0, sizeof(info));
2156 info.cmd = ETHTOOL_GET_TS_INFO;
2157
2158 if (phydev && phydev->drv && phydev->drv->ts_info) {
c8f3a8c3 2159 err = phydev->drv->ts_info(phydev, &info);
c03a14e8 2160 } else if (ops->get_ts_info) {
c8f3a8c3 2161 err = ops->get_ts_info(dev, &info);
c8f3a8c3
RC		 2162 } else {
2163 info.so_timestamping =
2164 SOF_TIMESTAMPING_RX_SOFTWARE |
2165 SOF_TIMESTAMPING_SOFTWARE;
2166 info.phc_index = -1;
2167 }
2168
2169 if (err)
2170 return err;
2171
2172 if (copy_to_user(useraddr, &info, sizeof(info)))
2173 err = -EFAULT;
2174
2175 return err;
2176}
2177
2f438366
ES		 2178static int __ethtool_get_module_info(struct net_device *dev,
2179 struct ethtool_modinfo *modinfo)
2180{
2181 const struct ethtool_ops *ops = dev->ethtool_ops;
2182 struct phy_device *phydev = dev->phydev;
2183
2184 if (phydev && phydev->drv && phydev->drv->module_info)
2185 return phydev->drv->module_info(phydev, modinfo);
2186
2187 if (ops->get_module_info)
2188 return ops->get_module_info(dev, modinfo);
2189
2190 return -EOPNOTSUPP;
2191}
2192
41c3cb6d
SH		 2193static int ethtool_get_module_info(struct net_device *dev,
2194 void __user *useraddr)
2195{
2196 int ret;
2197 struct ethtool_modinfo modinfo;
41c3cb6d
SH		 2198
2199 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2200 return -EFAULT;
2201
2f438366 2202 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2203 if (ret)
2204 return ret;
2205
2206 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2207 return -EFAULT;
2208
2209 return 0;
2210}
2211
2f438366
ES		 2212static int __ethtool_get_module_eeprom(struct net_device *dev,
2213 struct ethtool_eeprom *ee, u8 *data)
2214{
2215 const struct ethtool_ops *ops = dev->ethtool_ops;
2216 struct phy_device *phydev = dev->phydev;
2217
2218 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2219 return phydev->drv->module_eeprom(phydev, ee, data);
2220
2221 if (ops->get_module_eeprom)
2222 return ops->get_module_eeprom(dev, ee, data);
2223
2224 return -EOPNOTSUPP;
2225}
2226
41c3cb6d
SH		 2227static int ethtool_get_module_eeprom(struct net_device *dev,
2228 void __user *useraddr)
2229{
2230 int ret;
2231 struct ethtool_modinfo modinfo;
41c3cb6d 2232
2f438366 2233 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2234 if (ret)
2235 return ret;
2236
2f438366
ES		 2237 return ethtool_get_any_eeprom(dev, useraddr,
2238 __ethtool_get_module_eeprom,
41c3cb6d
SH		 2239 modinfo.eeprom_len);
2240}
2241
f0db9b07
GV		 2242static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2243{
2244 switch (tuna->id) {
2245 case ETHTOOL_RX_COPYBREAK:
1255a505 2246 case ETHTOOL_TX_COPYBREAK:
f0db9b07
GV		 2247 if (tuna->len != sizeof(u32) ||
2248 tuna->type_id != ETHTOOL_TUNABLE_U32)
2249 return -EINVAL;
2250 break;
2251 default:
2252 return -EINVAL;
2253 }
2254
2255 return 0;
2256}
2257
2258static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2259{
2260 int ret;
2261 struct ethtool_tunable tuna;
2262 const struct ethtool_ops *ops = dev->ethtool_ops;
2263 void *data;
2264
2265 if (!ops->get_tunable)
2266 return -EOPNOTSUPP;
2267 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2268 return -EFAULT;
2269 ret = ethtool_tunable_valid(&tuna);
2270 if (ret)
2271 return ret;
2272 data = kmalloc(tuna.len, GFP_USER);
2273 if (!data)
2274 return -ENOMEM;
2275 ret = ops->get_tunable(dev, &tuna, data);
2276 if (ret)
2277 goto out;
2278 useraddr += sizeof(tuna);
2279 ret = -EFAULT;
2280 if (copy_to_user(useraddr, data, tuna.len))
2281 goto out;
2282 ret = 0;
2283
2284out:
2285 kfree(data);
2286 return ret;
2287}
2288
2289static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2290{
2291 int ret;
2292 struct ethtool_tunable tuna;
2293 const struct ethtool_ops *ops = dev->ethtool_ops;
2294 void *data;
2295
2296 if (!ops->set_tunable)
2297 return -EOPNOTSUPP;
2298 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2299 return -EFAULT;
2300 ret = ethtool_tunable_valid(&tuna);
2301 if (ret)
2302 return ret;
2303 data = kmalloc(tuna.len, GFP_USER);
2304 if (!data)
2305 return -ENOMEM;
2306 useraddr += sizeof(tuna);
2307 ret = -EFAULT;
2308 if (copy_from_user(data, useraddr, tuna.len))
2309 goto out;
2310 ret = ops->set_tunable(dev, &tuna, data);
2311
2312out:
2313 kfree(data);
2314 return ret;
2315}
2316
421797b1
KL		 2317static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2318 void __user *useraddr,
2319 struct ethtool_per_queue_op *per_queue_opt)
2320{
2321 u32 bit;
2322 int ret;
2323 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2324
2325 if (!dev->ethtool_ops->get_per_queue_coalesce)
2326 return -EOPNOTSUPP;
2327
2328 useraddr += sizeof(*per_queue_opt);
2329
2330 bitmap_from_u32array(queue_mask,
2331 MAX_NUM_QUEUE,
2332 per_queue_opt->queue_mask,
2333 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2334
2335 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2336 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2337
2338 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2339 if (ret != 0)
2340 return ret;
2341 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2342 return -EFAULT;
2343 useraddr += sizeof(coalesce);
2344 }
2345
2346 return 0;
2347}
2348
f38d138a
KL		 2349static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2350 void __user *useraddr,
2351 struct ethtool_per_queue_op *per_queue_opt)
2352{
2353 u32 bit;
2354 int i, ret = 0;
2355 int n_queue;
2356 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2357 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2358
2359 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2360 (!dev->ethtool_ops->get_per_queue_coalesce))
2361 return -EOPNOTSUPP;
2362
2363 useraddr += sizeof(*per_queue_opt);
2364
2365 bitmap_from_u32array(queue_mask,
2366 MAX_NUM_QUEUE,
2367 per_queue_opt->queue_mask,
2368 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2369 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2370 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2371 if (!backup)
2372 return -ENOMEM;
2373
2374 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2375 struct ethtool_coalesce coalesce;
2376
2377 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2378 if (ret != 0)
2379 goto roll_back;
2380
2381 tmp++;
2382
2383 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2384 ret = -EFAULT;
2385 goto roll_back;
2386 }
2387
2388 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2389 if (ret != 0)
2390 goto roll_back;
2391
2392 useraddr += sizeof(coalesce);
2393 }
2394
2395roll_back:
2396 if (ret != 0) {
2397 tmp = backup;
2398 for_each_set_bit(i, queue_mask, bit) {
2399 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2400 tmp++;
2401 }
2402 }
2403 kfree(backup);
2404
2405 return ret;
2406}
2407
ac2c7ad0
KL		 2408static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2409{
2410 struct ethtool_per_queue_op per_queue_opt;
2411
2412 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2413 return -EFAULT;
2414
2415 switch (per_queue_opt.sub_command) {
421797b1
KL		 2416 case ETHTOOL_GCOALESCE:
2417 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
f38d138a
KL		 2418 case ETHTOOL_SCOALESCE:
2419 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
ac2c7ad0
KL		 2420 default:
2421 return -EOPNOTSUPP;
2422 };
2423}
2424
600fed5e 2425/* The main entry point in this file. Called from net/core/dev_ioctl.c */
1da177e4 2426
881d966b 2427int dev_ethtool(struct net *net, struct ifreq *ifr)
1da177e4 2428{
881d966b 2429 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1da177e4 2430 void __user *useraddr = ifr->ifr_data;
ac2c7ad0 2431 u32 ethcmd, sub_cmd;
1da177e4 2432 int rc;
b29d3145 2433 netdev_features_t old_features;
1da177e4 2434
1da177e4
LT		 2435 if (!dev || !netif_device_present(dev))
2436 return -ENODEV;
2437
97f8aefb 2438 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1da177e4
LT		 2439 return -EFAULT;
2440
ac2c7ad0
KL		 2441 if (ethcmd == ETHTOOL_PERQUEUE) {
2442 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2443 return -EFAULT;
2444 } else {
2445 sub_cmd = ethcmd;
2446 }
75f3123c 2447 /* Allow some commands to be done by anyone */
ac2c7ad0 2448 switch (sub_cmd) {
0fdc100b 2449 case ETHTOOL_GSET:
75f3123c 2450 case ETHTOOL_GDRVINFO:
75f3123c 2451 case ETHTOOL_GMSGLVL:
2da45db2 2452 case ETHTOOL_GLINK:
75f3123c
SH		 2453 case ETHTOOL_GCOALESCE:
2454 case ETHTOOL_GRINGPARAM:
2455 case ETHTOOL_GPAUSEPARAM:
2456 case ETHTOOL_GRXCSUM:
2457 case ETHTOOL_GTXCSUM:
2458 case ETHTOOL_GSG:
f80400a2 2459 case ETHTOOL_GSSET_INFO:
75f3123c 2460 case ETHTOOL_GSTRINGS:
2da45db2 2461 case ETHTOOL_GSTATS:
f3a40945 2462 case ETHTOOL_GPHYSTATS:
75f3123c
SH		 2463 case ETHTOOL_GTSO:
2464 case ETHTOOL_GPERMADDR:
2465 case ETHTOOL_GUFO:
2466 case ETHTOOL_GGSO:
1cab819b 2467 case ETHTOOL_GGRO:
339bf024
JG		 2468 case ETHTOOL_GFLAGS:
2469 case ETHTOOL_GPFLAGS:
0853ad66 2470 case ETHTOOL_GRXFH:
59089d8d
SB		 2471 case ETHTOOL_GRXRINGS:
2472 case ETHTOOL_GRXCLSRLCNT:
2473 case ETHTOOL_GRXCLSRULE:
2474 case ETHTOOL_GRXCLSRLALL:
2da45db2 2475 case ETHTOOL_GRXFHINDIR:
3de0b592 2476 case ETHTOOL_GRSSH:
5455c699 2477 case ETHTOOL_GFEATURES:
2da45db2 2478 case ETHTOOL_GCHANNELS:
c8f3a8c3 2479 case ETHTOOL_GET_TS_INFO:
2da45db2 2480 case ETHTOOL_GEEE:
f0db9b07 2481 case ETHTOOL_GTUNABLE:
8006f6bf 2482 case ETHTOOL_GLINKSETTINGS:
75f3123c
SH		 2483 break;
2484 default:
5e1fccc0 2485 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
75f3123c
SH		 2486 return -EPERM;
2487 }
2488
97f8aefb 2489 if (dev->ethtool_ops->begin) {
2490 rc = dev->ethtool_ops->begin(dev);
2491 if (rc < 0)
1da177e4 2492 return rc;
97f8aefb 2493 }
d8a33ac4
SH		 2494 old_features = dev->features;
2495
1da177e4
LT		 2496 switch (ethcmd) {
2497 case ETHTOOL_GSET:
2498 rc = ethtool_get_settings(dev, useraddr);
2499 break;
2500 case ETHTOOL_SSET:
2501 rc = ethtool_set_settings(dev, useraddr);
2502 break;
2503 case ETHTOOL_GDRVINFO:
2504 rc = ethtool_get_drvinfo(dev, useraddr);
1da177e4
LT		 2505 break;
2506 case ETHTOOL_GREGS:
2507 rc = ethtool_get_regs(dev, useraddr);
2508 break;
2509 case ETHTOOL_GWOL:
2510 rc = ethtool_get_wol(dev, useraddr);
2511 break;
2512 case ETHTOOL_SWOL:
2513 rc = ethtool_set_wol(dev, useraddr);
2514 break;
2515 case ETHTOOL_GMSGLVL:
13c99b24
JG		 2516 rc = ethtool_get_value(dev, useraddr, ethcmd,
2517 dev->ethtool_ops->get_msglevel);
1da177e4
LT		 2518 break;
2519 case ETHTOOL_SMSGLVL:
13c99b24
JG		 2520 rc = ethtool_set_value_void(dev, useraddr,
2521 dev->ethtool_ops->set_msglevel);
1da177e4 2522 break;
80f12ecc
YM		 2523 case ETHTOOL_GEEE:
2524 rc = ethtool_get_eee(dev, useraddr);
2525 break;
2526 case ETHTOOL_SEEE:
2527 rc = ethtool_set_eee(dev, useraddr);
2528 break;
1da177e4
LT		 2529 case ETHTOOL_NWAY_RST:
2530 rc = ethtool_nway_reset(dev);
2531 break;
2532 case ETHTOOL_GLINK:
e596e6e4 2533 rc = ethtool_get_link(dev, useraddr);
1da177e4
LT		 2534 break;
2535 case ETHTOOL_GEEPROM:
2536 rc = ethtool_get_eeprom(dev, useraddr);
2537 break;
2538 case ETHTOOL_SEEPROM:
2539 rc = ethtool_set_eeprom(dev, useraddr);
2540 break;
2541 case ETHTOOL_GCOALESCE:
2542 rc = ethtool_get_coalesce(dev, useraddr);
2543 break;
2544 case ETHTOOL_SCOALESCE:
2545 rc = ethtool_set_coalesce(dev, useraddr);
2546 break;
2547 case ETHTOOL_GRINGPARAM:
2548 rc = ethtool_get_ringparam(dev, useraddr);
2549 break;
2550 case ETHTOOL_SRINGPARAM:
2551 rc = ethtool_set_ringparam(dev, useraddr);
2552 break;
2553 case ETHTOOL_GPAUSEPARAM:
2554 rc = ethtool_get_pauseparam(dev, useraddr);
2555 break;
2556 case ETHTOOL_SPAUSEPARAM:
2557 rc = ethtool_set_pauseparam(dev, useraddr);
2558 break;
1da177e4
LT		 2559 case ETHTOOL_TEST:
2560 rc = ethtool_self_test(dev, useraddr);
2561 break;
2562 case ETHTOOL_GSTRINGS:
2563 rc = ethtool_get_strings(dev, useraddr);
2564 break;
2565 case ETHTOOL_PHYS_ID:
2566 rc = ethtool_phys_id(dev, useraddr);
2567 break;
2568 case ETHTOOL_GSTATS:
2569 rc = ethtool_get_stats(dev, useraddr);
2570 break;
a6f9a705
JW		 2571 case ETHTOOL_GPERMADDR:
2572 rc = ethtool_get_perm_addr(dev, useraddr);
2573 break;
3ae7c0b2 2574 case ETHTOOL_GFLAGS:
13c99b24 2575 rc = ethtool_get_value(dev, useraddr, ethcmd,
bc5787c6 2576 __ethtool_get_flags);
3ae7c0b2
JG		 2577 break;
2578 case ETHTOOL_SFLAGS:
da8ac86c 2579 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3ae7c0b2 2580 break;
339bf024 2581 case ETHTOOL_GPFLAGS:
13c99b24
JG		 2582 rc = ethtool_get_value(dev, useraddr, ethcmd,
2583 dev->ethtool_ops->get_priv_flags);
339bf024
JG		 2584 break;
2585 case ETHTOOL_SPFLAGS:
13c99b24
JG		 2586 rc = ethtool_set_value(dev, useraddr,
2587 dev->ethtool_ops->set_priv_flags);
339bf024 2588 break;
0853ad66 2589 case ETHTOOL_GRXFH:
59089d8d
SB		 2590 case ETHTOOL_GRXRINGS:
2591 case ETHTOOL_GRXCLSRLCNT:
2592 case ETHTOOL_GRXCLSRULE:
2593 case ETHTOOL_GRXCLSRLALL:
bf988435 2594 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
0853ad66
SB		 2595 break;
2596 case ETHTOOL_SRXFH:
59089d8d
SB		 2597 case ETHTOOL_SRXCLSRLDEL:
2598 case ETHTOOL_SRXCLSRLINS:
bf988435 2599 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
0853ad66 2600 break;
05c6a8d7
AK		 2601 case ETHTOOL_FLASHDEV:
2602 rc = ethtool_flash_device(dev, useraddr);
2603 break;
d73d3a8c
BH		 2604 case ETHTOOL_RESET:
2605 rc = ethtool_reset(dev, useraddr);
2606 break;
723b2f57
JG		 2607 case ETHTOOL_GSSET_INFO:
2608 rc = ethtool_get_sset_info(dev, useraddr);
2609 break;
a5b6ee29
BH		 2610 case ETHTOOL_GRXFHINDIR:
2611 rc = ethtool_get_rxfh_indir(dev, useraddr);
2612 break;
2613 case ETHTOOL_SRXFHINDIR:
2614 rc = ethtool_set_rxfh_indir(dev, useraddr);
2615 break;
3de0b592
VD		 2616 case ETHTOOL_GRSSH:
2617 rc = ethtool_get_rxfh(dev, useraddr);
2618 break;
2619 case ETHTOOL_SRSSH:
2620 rc = ethtool_set_rxfh(dev, useraddr);
2621 break;
5455c699
MM		 2622 case ETHTOOL_GFEATURES:
2623 rc = ethtool_get_features(dev, useraddr);
2624 break;
2625 case ETHTOOL_SFEATURES:
2626 rc = ethtool_set_features(dev, useraddr);
2627 break;
0a417704 2628 case ETHTOOL_GTXCSUM:
e83d360d 2629 case ETHTOOL_GRXCSUM:
0a417704
MM		 2630 case ETHTOOL_GSG:
2631 case ETHTOOL_GTSO:
2632 case ETHTOOL_GUFO:
2633 case ETHTOOL_GGSO:
2634 case ETHTOOL_GGRO:
2635 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2636 break;
2637 case ETHTOOL_STXCSUM:
e83d360d 2638 case ETHTOOL_SRXCSUM:
0a417704
MM		 2639 case ETHTOOL_SSG:
2640 case ETHTOOL_STSO:
2641 case ETHTOOL_SUFO:
2642 case ETHTOOL_SGSO:
2643 case ETHTOOL_SGRO:
2644 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2645 break;
8b5933c3 2646 case ETHTOOL_GCHANNELS:
2647 rc = ethtool_get_channels(dev, useraddr);
2648 break;
2649 case ETHTOOL_SCHANNELS:
2650 rc = ethtool_set_channels(dev, useraddr);
2651 break;
29dd54b7
AC		 2652 case ETHTOOL_SET_DUMP:
2653 rc = ethtool_set_dump(dev, useraddr);
2654 break;
2655 case ETHTOOL_GET_DUMP_FLAG:
2656 rc = ethtool_get_dump_flag(dev, useraddr);
2657 break;
2658 case ETHTOOL_GET_DUMP_DATA:
2659 rc = ethtool_get_dump_data(dev, useraddr);
2660 break;
c8f3a8c3
RC		 2661 case ETHTOOL_GET_TS_INFO:
2662 rc = ethtool_get_ts_info(dev, useraddr);
2663 break;
41c3cb6d
SH		 2664 case ETHTOOL_GMODULEINFO:
2665 rc = ethtool_get_module_info(dev, useraddr);
2666 break;
2667 case ETHTOOL_GMODULEEEPROM:
2668 rc = ethtool_get_module_eeprom(dev, useraddr);
2669 break;
f0db9b07
GV		 2670 case ETHTOOL_GTUNABLE:
2671 rc = ethtool_get_tunable(dev, useraddr);
2672 break;
2673 case ETHTOOL_STUNABLE:
2674 rc = ethtool_set_tunable(dev, useraddr);
2675 break;
f3a40945
AL		 2676 case ETHTOOL_GPHYSTATS:
2677 rc = ethtool_get_phy_stats(dev, useraddr);
2678 break;
ac2c7ad0
KL		 2679 case ETHTOOL_PERQUEUE:
2680 rc = ethtool_set_per_queue(dev, useraddr);
2681 break;
3f1ac7a7
DD		 2682 case ETHTOOL_GLINKSETTINGS:
2683 rc = ethtool_get_link_ksettings(dev, useraddr);
2684 break;
2685 case ETHTOOL_SLINKSETTINGS:
2686 rc = ethtool_set_link_ksettings(dev, useraddr);
2687 break;
1da177e4 2688 default:
61a44b9c 2689 rc = -EOPNOTSUPP;
1da177e4 2690 }
4ec93edb 2691
e71a4783 2692 if (dev->ethtool_ops->complete)
1da177e4 2693 dev->ethtool_ops->complete(dev);
d8a33ac4
SH		 2694
2695 if (old_features != dev->features)
2696 netdev_features_change(dev);
2697
1da177e4 2698 return rc;
1da177e4 2699}
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