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ethtool: do not vzalloc(0) on registers dump
[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
968ad9da
RL		 122static const char
123phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
124 [ETHTOOL_ID_UNSPEC] = "Unspec",
65feddd5 125 [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
968ad9da
RL		 126};
127
5455c699
MM		 128static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
129{
130 struct ethtool_gfeatures cmd = {
131 .cmd = ETHTOOL_GFEATURES,
132 .size = ETHTOOL_DEV_FEATURE_WORDS,
133 };
475414f6 134 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
5455c699
MM		 135 u32 __user *sizeaddr;
136 u32 copy_size;
475414f6
MM		 137 int i;
138
139 /* in case feature bits run out again */
09da71b1 140 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
475414f6
MM		 141
142 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 143 features[i].available = (u32)(dev->hw_features >> (32 * i));
144 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
145 features[i].active = (u32)(dev->features >> (32 * i));
146 features[i].never_changed =
147 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
475414f6 148 }
5455c699
MM		 149
150 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
151 if (get_user(copy_size, sizeaddr))
152 return -EFAULT;
153
154 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
155 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
156
157 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
158 return -EFAULT;
159 useraddr += sizeof(cmd);
160 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
161 return -EFAULT;
162
163 return 0;
164}
165
166static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
167{
168 struct ethtool_sfeatures cmd;
169 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
475414f6
MM		 170 netdev_features_t wanted = 0, valid = 0;
171 int i, ret = 0;
5455c699
MM		 172
173 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
174 return -EFAULT;
175 useraddr += sizeof(cmd);
176
177 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
178 return -EINVAL;
179
180 if (copy_from_user(features, useraddr, sizeof(features)))
181 return -EFAULT;
182
475414f6 183 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 184 valid |= (netdev_features_t)features[i].valid << (32 * i);
185 wanted |= (netdev_features_t)features[i].requested << (32 * i);
475414f6
MM		 186 }
187
188 if (valid & ~NETIF_F_ETHTOOL_BITS)
5455c699
MM		 189 return -EINVAL;
190
475414f6
MM		 191 if (valid & ~dev->hw_features) {
192 valid &= dev->hw_features;
5455c699
MM		 193 ret |= ETHTOOL_F_UNSUPPORTED;
194 }
195
475414f6
MM		 196 dev->wanted_features &= ~valid;
197 dev->wanted_features |= wanted & valid;
6cb6a27c 198 __netdev_update_features(dev);
5455c699 199
475414f6 200 if ((dev->wanted_features ^ dev->features) & valid)
5455c699
MM		 201 ret |= ETHTOOL_F_WISH;
202
203 return ret;
204}
205
f3a40945
AL		 206static int phy_get_sset_count(struct phy_device *phydev)
207{
208 int ret;
209
210 if (phydev->drv->get_sset_count &&
211 phydev->drv->get_strings &&
212 phydev->drv->get_stats) {
213 mutex_lock(&phydev->lock);
214 ret = phydev->drv->get_sset_count(phydev);
215 mutex_unlock(&phydev->lock);
216
217 return ret;
218 }
219
220 return -EOPNOTSUPP;
221}
222
340ae165
MM		 223static int __ethtool_get_sset_count(struct net_device *dev, int sset)
224{
225 const struct ethtool_ops *ops = dev->ethtool_ops;
226
5455c699
MM		 227 if (sset == ETH_SS_FEATURES)
228 return ARRAY_SIZE(netdev_features_strings);
229
892311f6
EP		 230 if (sset == ETH_SS_RSS_HASH_FUNCS)
231 return ARRAY_SIZE(rss_hash_func_strings);
232
a4244b0c
HHZ		 233 if (sset == ETH_SS_TUNABLES)
234 return ARRAY_SIZE(tunable_strings);
235
968ad9da
RL		 236 if (sset == ETH_SS_PHY_TUNABLES)
237 return ARRAY_SIZE(phy_tunable_strings);
238
f3a40945
AL		 239 if (sset == ETH_SS_PHY_STATS) {
240 if (dev->phydev)
241 return phy_get_sset_count(dev->phydev);
242 else
243 return -EOPNOTSUPP;
244 }
245
c03a14e8 246 if (ops->get_sset_count && ops->get_strings)
340ae165
MM		 247 return ops->get_sset_count(dev, sset);
248 else
249 return -EOPNOTSUPP;
250}
251
252static void __ethtool_get_strings(struct net_device *dev,
253 u32 stringset, u8 *data)
254{
255 const struct ethtool_ops *ops = dev->ethtool_ops;
256
5455c699
MM		 257 if (stringset == ETH_SS_FEATURES)
258 memcpy(data, netdev_features_strings,
259 sizeof(netdev_features_strings));
892311f6
EP		 260 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
261 memcpy(data, rss_hash_func_strings,
262 sizeof(rss_hash_func_strings));
a4244b0c
HHZ		 263 else if (stringset == ETH_SS_TUNABLES)
264 memcpy(data, tunable_strings, sizeof(tunable_strings));
968ad9da
RL		 265 else if (stringset == ETH_SS_PHY_TUNABLES)
266 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
f3a40945
AL		 267 else if (stringset == ETH_SS_PHY_STATS) {
268 struct phy_device *phydev = dev->phydev;
269
270 if (phydev) {
271 mutex_lock(&phydev->lock);
272 phydev->drv->get_strings(phydev, data);
273 mutex_unlock(&phydev->lock);
274 } else {
275 return;
276 }
277 } else
5455c699
MM		 278 /* ops->get_strings is valid because checked earlier */
279 ops->get_strings(dev, stringset, data);
340ae165
MM		 280}
281
c8f44aff 282static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
0a417704
MM		 283{
284 /* feature masks of legacy discrete ethtool ops */
285
286 switch (eth_cmd) {
287 case ETHTOOL_GTXCSUM:
288 case ETHTOOL_STXCSUM:
a188222b 289 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
e83d360d
MM		 290 case ETHTOOL_GRXCSUM:
291 case ETHTOOL_SRXCSUM:
292 return NETIF_F_RXCSUM;
0a417704
MM		 293 case ETHTOOL_GSG:
294 case ETHTOOL_SSG:
295 return NETIF_F_SG;
296 case ETHTOOL_GTSO:
297 case ETHTOOL_STSO:
298 return NETIF_F_ALL_TSO;
299 case ETHTOOL_GUFO:
300 case ETHTOOL_SUFO:
301 return NETIF_F_UFO;
302 case ETHTOOL_GGSO:
303 case ETHTOOL_SGSO:
304 return NETIF_F_GSO;
305 case ETHTOOL_GGRO:
306 case ETHTOOL_SGRO:
307 return NETIF_F_GRO;
308 default:
309 BUG();
310 }
311}
312
0a417704
MM		 313static int ethtool_get_one_feature(struct net_device *dev,
314 char __user *useraddr, u32 ethcmd)
315{
c8f44aff 316 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
0a417704
MM		 317 struct ethtool_value edata = {
318 .cmd = ethcmd,
86794881 319 .data = !!(dev->features & mask),
0a417704 320 };
0a417704 321
0a417704
MM		 322 if (copy_to_user(useraddr, &edata, sizeof(edata)))
323 return -EFAULT;
324 return 0;
325}
326
0a417704
MM		 327static int ethtool_set_one_feature(struct net_device *dev,
328 void __user *useraddr, u32 ethcmd)
329{
330 struct ethtool_value edata;
c8f44aff 331 netdev_features_t mask;
0a417704
MM		 332
333 if (copy_from_user(&edata, useraddr, sizeof(edata)))
334 return -EFAULT;
335
86794881
MM		 336 mask = ethtool_get_feature_mask(ethcmd);
337 mask &= dev->hw_features;
bc5787c6
MM		 338 if (!mask)
339 return -EOPNOTSUPP;
86794881 340
bc5787c6
MM		 341 if (edata.data)
342 dev->wanted_features |= mask;
343 else
344 dev->wanted_features &= ~mask;
86794881 345
bc5787c6 346 __netdev_update_features(dev);
86794881 347
bc5787c6
MM		 348 return 0;
349}
350
02b3a552
MM		 351#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
352 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
f646968f
PM		 353#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
354 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
355 NETIF_F_RXHASH)
bc5787c6
MM		 356
357static u32 __ethtool_get_flags(struct net_device *dev)
358{
02b3a552
MM		 359 u32 flags = 0;
360
8a73125c
DF		 361 if (dev->features & NETIF_F_LRO)
362 flags |= ETH_FLAG_LRO;
363 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
364 flags |= ETH_FLAG_RXVLAN;
365 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
366 flags |= ETH_FLAG_TXVLAN;
367 if (dev->features & NETIF_F_NTUPLE)
368 flags |= ETH_FLAG_NTUPLE;
369 if (dev->features & NETIF_F_RXHASH)
370 flags |= ETH_FLAG_RXHASH;
02b3a552
MM		 371
372 return flags;
0a417704
MM		 373}
374
bc5787c6 375static int __ethtool_set_flags(struct net_device *dev, u32 data)
da8ac86c 376{
c8f44aff 377 netdev_features_t features = 0, changed;
da8ac86c 378
02b3a552 379 if (data & ~ETH_ALL_FLAGS)
da8ac86c
MM		 380 return -EINVAL;
381
8a73125c
DF		 382 if (data & ETH_FLAG_LRO)
383 features |= NETIF_F_LRO;
384 if (data & ETH_FLAG_RXVLAN)
385 features |= NETIF_F_HW_VLAN_CTAG_RX;
386 if (data & ETH_FLAG_TXVLAN)
387 features |= NETIF_F_HW_VLAN_CTAG_TX;
388 if (data & ETH_FLAG_NTUPLE)
389 features |= NETIF_F_NTUPLE;
390 if (data & ETH_FLAG_RXHASH)
391 features |= NETIF_F_RXHASH;
02b3a552 392
da8ac86c 393 /* allow changing only bits set in hw_features */
02b3a552 394 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
da8ac86c
MM		 395 if (changed & ~dev->hw_features)
396 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
397
398 dev->wanted_features =
02b3a552 399 (dev->wanted_features & ~changed) | (features & changed);
da8ac86c 400
6cb6a27c 401 __netdev_update_features(dev);
da8ac86c
MM		 402
403 return 0;
404}
405
6d62b4d5
PR		 406void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
407 u32 legacy_u32)
3f1ac7a7
DD		 408{
409 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
410 dst[0] = legacy_u32;
411}
6d62b4d5 412EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
3f1ac7a7
DD		 413
414/* return false if src had higher bits set. lower bits always updated. */
6d62b4d5
PR		 415bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
416 const unsigned long *src)
3f1ac7a7
DD		 417{
418 bool retval = true;
419
420 /* TODO: following test will soon always be true */
421 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
422 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
423
424 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
425 bitmap_fill(ext, 32);
426 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
427 if (bitmap_intersects(ext, src,
428 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
429 /* src mask goes beyond bit 31 */
430 retval = false;
431 }
432 }
433 *legacy_u32 = src[0];
434 return retval;
435}
6d62b4d5 436EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
3f1ac7a7
DD		 437
438/* return false if legacy contained non-0 deprecated fields
439 * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
440 */
441static bool
442convert_legacy_settings_to_link_ksettings(
443 struct ethtool_link_ksettings *link_ksettings,
444 const struct ethtool_cmd *legacy_settings)
445{
446 bool retval = true;
447
448 memset(link_ksettings, 0, sizeof(*link_ksettings));
449
450 /* This is used to tell users that driver is still using these
451 * deprecated legacy fields, and they should not use
452 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
453 */
454 if (legacy_settings->transceiver ||
455 legacy_settings->maxtxpkt ||
456 legacy_settings->maxrxpkt)
457 retval = false;
458
6d62b4d5 459 ethtool_convert_legacy_u32_to_link_mode(
3f1ac7a7
DD		 460 link_ksettings->link_modes.supported,
461 legacy_settings->supported);
6d62b4d5 462 ethtool_convert_legacy_u32_to_link_mode(
3f1ac7a7
DD		 463 link_ksettings->link_modes.advertising,
464 legacy_settings->advertising);
6d62b4d5 465 ethtool_convert_legacy_u32_to_link_mode(
3f1ac7a7
DD		 466 link_ksettings->link_modes.lp_advertising,
467 legacy_settings->lp_advertising);
468 link_ksettings->base.speed
469 = ethtool_cmd_speed(legacy_settings);
470 link_ksettings->base.duplex
471 = legacy_settings->duplex;
472 link_ksettings->base.port
473 = legacy_settings->port;
474 link_ksettings->base.phy_address
475 = legacy_settings->phy_address;
476 link_ksettings->base.autoneg
477 = legacy_settings->autoneg;
478 link_ksettings->base.mdio_support
479 = legacy_settings->mdio_support;
480 link_ksettings->base.eth_tp_mdix
481 = legacy_settings->eth_tp_mdix;
482 link_ksettings->base.eth_tp_mdix_ctrl
483 = legacy_settings->eth_tp_mdix_ctrl;
484 return retval;
485}
486
487/* return false if ksettings link modes had higher bits
488 * set. legacy_settings always updated (best effort)
489 */
490static bool
491convert_link_ksettings_to_legacy_settings(
492 struct ethtool_cmd *legacy_settings,
493 const struct ethtool_link_ksettings *link_ksettings)
494{
495 bool retval = true;
496
497 memset(legacy_settings, 0, sizeof(*legacy_settings));
498 /* this also clears the deprecated fields in legacy structure:
499 * __u8 transceiver;
500 * __u32 maxtxpkt;
501 * __u32 maxrxpkt;
502 */
503
6d62b4d5 504 retval &= ethtool_convert_link_mode_to_legacy_u32(
3f1ac7a7
DD		 505 &legacy_settings->supported,
506 link_ksettings->link_modes.supported);
6d62b4d5 507 retval &= ethtool_convert_link_mode_to_legacy_u32(
3f1ac7a7
DD		 508 &legacy_settings->advertising,
509 link_ksettings->link_modes.advertising);
6d62b4d5 510 retval &= ethtool_convert_link_mode_to_legacy_u32(
3f1ac7a7
DD		 511 &legacy_settings->lp_advertising,
512 link_ksettings->link_modes.lp_advertising);
513 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
514 legacy_settings->duplex
515 = link_ksettings->base.duplex;
516 legacy_settings->port
517 = link_ksettings->base.port;
518 legacy_settings->phy_address
519 = link_ksettings->base.phy_address;
520 legacy_settings->autoneg
521 = link_ksettings->base.autoneg;
522 legacy_settings->mdio_support
523 = link_ksettings->base.mdio_support;
524 legacy_settings->eth_tp_mdix
525 = link_ksettings->base.eth_tp_mdix;
526 legacy_settings->eth_tp_mdix_ctrl
527 = link_ksettings->base.eth_tp_mdix_ctrl;
528 return retval;
529}
530
531/* number of 32-bit words to store the user's link mode bitmaps */
532#define __ETHTOOL_LINK_MODE_MASK_NU32 \
533 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
534
535/* layout of the struct passed from/to userland */
536struct ethtool_link_usettings {
537 struct ethtool_link_settings base;
538 struct {
539 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
540 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
541 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
542 } link_modes;
543};
544
545/* Internal kernel helper to query a device ethtool_link_settings.
546 *
547 * Backward compatibility note: for compatibility with legacy drivers
548 * that implement only the ethtool_cmd API, this has to work with both
549 * drivers implementing get_link_ksettings API and drivers
550 * implementing get_settings API. When drivers implement get_settings
551 * and report ethtool_cmd deprecated fields
552 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
553 * because the resulting struct ethtool_link_settings does not report them.
554 */
555int __ethtool_get_link_ksettings(struct net_device *dev,
556 struct ethtool_link_ksettings *link_ksettings)
557{
558 int err;
559 struct ethtool_cmd cmd;
560
561 ASSERT_RTNL();
562
563 if (dev->ethtool_ops->get_link_ksettings) {
564 memset(link_ksettings, 0, sizeof(*link_ksettings));
565 return dev->ethtool_ops->get_link_ksettings(dev,
566 link_ksettings);
567 }
568
569 /* driver doesn't support %ethtool_link_ksettings API. revert to
570 * legacy %ethtool_cmd API, unless it's not supported either.
571 * TODO: remove when ethtool_ops::get_settings disappears internally
572 */
3237fc63
DD		 573 if (!dev->ethtool_ops->get_settings)
574 return -EOPNOTSUPP;
575
576 memset(&cmd, 0, sizeof(cmd));
577 cmd.cmd = ETHTOOL_GSET;
578 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 579 if (err < 0)
580 return err;
581
582 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
583 */
584 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
585 return err;
586}
587EXPORT_SYMBOL(__ethtool_get_link_ksettings);
588
589/* convert ethtool_link_usettings in user space to a kernel internal
590 * ethtool_link_ksettings. return 0 on success, errno on error.
591 */
592static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
593 const void __user *from)
594{
595 struct ethtool_link_usettings link_usettings;
596
597 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
598 return -EFAULT;
599
600 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
601 bitmap_from_u32array(to->link_modes.supported,
602 __ETHTOOL_LINK_MODE_MASK_NBITS,
603 link_usettings.link_modes.supported,
604 __ETHTOOL_LINK_MODE_MASK_NU32);
605 bitmap_from_u32array(to->link_modes.advertising,
606 __ETHTOOL_LINK_MODE_MASK_NBITS,
607 link_usettings.link_modes.advertising,
608 __ETHTOOL_LINK_MODE_MASK_NU32);
609 bitmap_from_u32array(to->link_modes.lp_advertising,
610 __ETHTOOL_LINK_MODE_MASK_NBITS,
611 link_usettings.link_modes.lp_advertising,
612 __ETHTOOL_LINK_MODE_MASK_NU32);
613
614 return 0;
615}
616
617/* convert a kernel internal ethtool_link_ksettings to
618 * ethtool_link_usettings in user space. return 0 on success, errno on
619 * error.
620 */
621static int
622store_link_ksettings_for_user(void __user *to,
623 const struct ethtool_link_ksettings *from)
624{
625 struct ethtool_link_usettings link_usettings;
626
627 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
628 bitmap_to_u32array(link_usettings.link_modes.supported,
629 __ETHTOOL_LINK_MODE_MASK_NU32,
630 from->link_modes.supported,
631 __ETHTOOL_LINK_MODE_MASK_NBITS);
632 bitmap_to_u32array(link_usettings.link_modes.advertising,
633 __ETHTOOL_LINK_MODE_MASK_NU32,
634 from->link_modes.advertising,
635 __ETHTOOL_LINK_MODE_MASK_NBITS);
636 bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
637 __ETHTOOL_LINK_MODE_MASK_NU32,
638 from->link_modes.lp_advertising,
639 __ETHTOOL_LINK_MODE_MASK_NBITS);
640
641 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
642 return -EFAULT;
643
644 return 0;
645}
646
647/* Query device for its ethtool_link_settings.
648 *
649 * Backward compatibility note: this function must fail when driver
650 * does not implement ethtool::get_link_ksettings, even if legacy
651 * ethtool_ops::get_settings is implemented. This tells new versions
652 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
653 * this driver, so that they can correctly access the ethtool_cmd
654 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
655 * implements ethtool_ops::get_settings anymore.
656 */
657static int ethtool_get_link_ksettings(struct net_device *dev,
658 void __user *useraddr)
659{
660 int err = 0;
661 struct ethtool_link_ksettings link_ksettings;
662
663 ASSERT_RTNL();
664
665 if (!dev->ethtool_ops->get_link_ksettings)
666 return -EOPNOTSUPP;
667
668 /* handle bitmap nbits handshake */
669 if (copy_from_user(&link_ksettings.base, useraddr,
670 sizeof(link_ksettings.base)))
671 return -EFAULT;
672
673 if (__ETHTOOL_LINK_MODE_MASK_NU32
674 != link_ksettings.base.link_mode_masks_nwords) {
675 /* wrong link mode nbits requested */
676 memset(&link_ksettings, 0, sizeof(link_ksettings));
793cf87d 677 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
3f1ac7a7
DD		 678 /* send back number of words required as negative val */
679 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
680 "need too many bits for link modes!");
681 link_ksettings.base.link_mode_masks_nwords
682 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
683
684 /* copy the base fields back to user, not the link
685 * mode bitmaps
686 */
687 if (copy_to_user(useraddr, &link_ksettings.base,
688 sizeof(link_ksettings.base)))
689 return -EFAULT;
690
691 return 0;
692 }
693
694 /* handshake successful: user/kernel agree on
695 * link_mode_masks_nwords
696 */
697
698 memset(&link_ksettings, 0, sizeof(link_ksettings));
699 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
700 if (err < 0)
701 return err;
702
703 /* make sure we tell the right values to user */
704 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
705 link_ksettings.base.link_mode_masks_nwords
706 = __ETHTOOL_LINK_MODE_MASK_NU32;
707
708 return store_link_ksettings_for_user(useraddr, &link_ksettings);
709}
710
711/* Update device ethtool_link_settings.
712 *
713 * Backward compatibility note: this function must fail when driver
714 * does not implement ethtool::set_link_ksettings, even if legacy
715 * ethtool_ops::set_settings is implemented. This tells new versions
716 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
717 * this driver, so that they can correctly update the ethtool_cmd
718 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
719 * implements ethtool_ops::get_settings anymore.
720 */
721static int ethtool_set_link_ksettings(struct net_device *dev,
722 void __user *useraddr)
723{
724 int err;
725 struct ethtool_link_ksettings link_ksettings;
726
727 ASSERT_RTNL();
728
729 if (!dev->ethtool_ops->set_link_ksettings)
730 return -EOPNOTSUPP;
731
732 /* make sure nbits field has expected value */
733 if (copy_from_user(&link_ksettings.base, useraddr,
734 sizeof(link_ksettings.base)))
735 return -EFAULT;
736
737 if (__ETHTOOL_LINK_MODE_MASK_NU32
738 != link_ksettings.base.link_mode_masks_nwords)
739 return -EINVAL;
740
741 /* copy the whole structure, now that we know it has expected
742 * format
743 */
744 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
745 if (err)
746 return err;
747
748 /* re-check nwords field, just in case */
749 if (__ETHTOOL_LINK_MODE_MASK_NU32
750 != link_ksettings.base.link_mode_masks_nwords)
751 return -EINVAL;
752
753 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
754}
755
3f1ac7a7
DD		 756static void
757warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
758{
759 char name[sizeof(current->comm)];
760
761 pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
762 get_task_comm(name, current), details);
763}
764
765/* Query device for its ethtool_cmd settings.
766 *
767 * Backward compatibility note: for compatibility with legacy ethtool,
768 * this has to work with both drivers implementing get_link_ksettings
769 * API and drivers implementing get_settings API. When drivers
770 * implement get_link_ksettings and report higher link mode bits, a
771 * kernel warning is logged once (with name of 1st driver/device) to
772 * recommend user to upgrade ethtool, but the command is successful
773 * (only the lower link mode bits reported back to user).
774 */
4bc71cb9
JP		 775static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
776{
4bc71cb9
JP		 777 struct ethtool_cmd cmd;
778
3f1ac7a7
DD		 779 ASSERT_RTNL();
780
781 if (dev->ethtool_ops->get_link_ksettings) {
782 /* First, use link_ksettings API if it is supported */
783 int err;
784 struct ethtool_link_ksettings link_ksettings;
785
786 memset(&link_ksettings, 0, sizeof(link_ksettings));
787 err = dev->ethtool_ops->get_link_ksettings(dev,
788 &link_ksettings);
789 if (err < 0)
790 return err;
791 if (!convert_link_ksettings_to_legacy_settings(&cmd,
792 &link_ksettings))
793 warn_incomplete_ethtool_legacy_settings_conversion(
794 "link modes are only partially reported");
795
796 /* send a sensible cmd tag back to user */
797 cmd.cmd = ETHTOOL_GSET;
798 } else {
3f1ac7a7
DD		 799 /* driver doesn't support %ethtool_link_ksettings
800 * API. revert to legacy %ethtool_cmd API, unless it's
801 * not supported either.
802 */
3237fc63
DD		 803 int err;
804
805 if (!dev->ethtool_ops->get_settings)
806 return -EOPNOTSUPP;
807
808 memset(&cmd, 0, sizeof(cmd));
809 cmd.cmd = ETHTOOL_GSET;
810 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 811 if (err < 0)
812 return err;
813 }
1da177e4
LT		 814
815 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
816 return -EFAULT;
3f1ac7a7 817
1da177e4
LT		 818 return 0;
819}
820
3f1ac7a7
DD		 821/* Update device link settings with given ethtool_cmd.
822 *
823 * Backward compatibility note: for compatibility with legacy ethtool,
824 * this has to work with both drivers implementing set_link_ksettings
825 * API and drivers implementing set_settings API. When drivers
826 * implement set_link_ksettings and user's request updates deprecated
827 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
828 * warning is logged once (with name of 1st driver/device) to
829 * recommend user to upgrade ethtool, and the request is rejected.
830 */
1da177e4
LT		 831static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
832{
833 struct ethtool_cmd cmd;
834
3f1ac7a7 835 ASSERT_RTNL();
1da177e4
LT		 836
837 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
838 return -EFAULT;
839
3f1ac7a7
DD		 840 /* first, try new %ethtool_link_ksettings API. */
841 if (dev->ethtool_ops->set_link_ksettings) {
842 struct ethtool_link_ksettings link_ksettings;
843
844 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
845 &cmd))
846 return -EINVAL;
847
848 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
849 link_ksettings.base.link_mode_masks_nwords
850 = __ETHTOOL_LINK_MODE_MASK_NU32;
851 return dev->ethtool_ops->set_link_ksettings(dev,
852 &link_ksettings);
853 }
854
855 /* legacy %ethtool_cmd API */
856
857 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
858 * disappears internally
859 */
860
861 if (!dev->ethtool_ops->set_settings)
862 return -EOPNOTSUPP;
863
1da177e4
LT		 864 return dev->ethtool_ops->set_settings(dev, &cmd);
865}
866
97f8aefb 867static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
868 void __user *useraddr)
1da177e4
LT		 869{
870 struct ethtool_drvinfo info;
76fd8593 871 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 872
1da177e4
LT		 873 memset(&info, 0, sizeof(info));
874 info.cmd = ETHTOOL_GDRVINFO;
c03a14e8 875 if (ops->get_drvinfo) {
01414802
BH		 876 ops->get_drvinfo(dev, &info);
877 } else if (dev->dev.parent && dev->dev.parent->driver) {
878 strlcpy(info.bus_info, dev_name(dev->dev.parent),
879 sizeof(info.bus_info));
880 strlcpy(info.driver, dev->dev.parent->driver->name,
881 sizeof(info.driver));
882 } else {
883 return -EOPNOTSUPP;
884 }
1da177e4 885
723b2f57
JG		 886 /*
887 * this method of obtaining string set info is deprecated;
d17792eb 888 * Use ETHTOOL_GSSET_INFO instead.
723b2f57 889 */
c03a14e8 890 if (ops->get_sset_count) {
ff03d49f
JG		 891 int rc;
892
893 rc = ops->get_sset_count(dev, ETH_SS_TEST);
894 if (rc >= 0)
895 info.testinfo_len = rc;
896 rc = ops->get_sset_count(dev, ETH_SS_STATS);
897 if (rc >= 0)
898 info.n_stats = rc;
339bf024
JG		 899 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
900 if (rc >= 0)
901 info.n_priv_flags = rc;
ff03d49f 902 }
c03a14e8 903 if (ops->get_regs_len)
1da177e4 904 info.regdump_len = ops->get_regs_len(dev);
c03a14e8 905 if (ops->get_eeprom_len)
1da177e4
LT		 906 info.eedump_len = ops->get_eeprom_len(dev);
907
908 if (copy_to_user(useraddr, &info, sizeof(info)))
909 return -EFAULT;
910 return 0;
911}
912
f5c445ed 913static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
97f8aefb 914 void __user *useraddr)
723b2f57
JG		 915{
916 struct ethtool_sset_info info;
723b2f57
JG		 917 u64 sset_mask;
918 int i, idx = 0, n_bits = 0, ret, rc;
919 u32 *info_buf = NULL;
920
723b2f57
JG		 921 if (copy_from_user(&info, useraddr, sizeof(info)))
922 return -EFAULT;
923
924 /* store copy of mask, because we zero struct later on */
925 sset_mask = info.sset_mask;
926 if (!sset_mask)
927 return 0;
928
929 /* calculate size of return buffer */
d17792eb 930 n_bits = hweight64(sset_mask);
723b2f57
JG		 931
932 memset(&info, 0, sizeof(info));
933 info.cmd = ETHTOOL_GSSET_INFO;
934
935 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
936 if (!info_buf)
937 return -ENOMEM;
938
939 /*
940 * fill return buffer based on input bitmask and successful
941 * get_sset_count return
942 */
943 for (i = 0; i < 64; i++) {
944 if (!(sset_mask & (1ULL << i)))
945 continue;
946
340ae165 947 rc = __ethtool_get_sset_count(dev, i);
723b2f57
JG		 948 if (rc >= 0) {
949 info.sset_mask |= (1ULL << i);
950 info_buf[idx++] = rc;
951 }
952 }
953
954 ret = -EFAULT;
955 if (copy_to_user(useraddr, &info, sizeof(info)))
956 goto out;
957
958 useraddr += offsetof(struct ethtool_sset_info, data);
959 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
960 goto out;
961
962 ret = 0;
963
964out:
965 kfree(info_buf);
966 return ret;
967}
968
97f8aefb 969static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
bf988435 970 u32 cmd, void __user *useraddr)
0853ad66 971{
bf988435
BH		 972 struct ethtool_rxnfc info;
973 size_t info_size = sizeof(info);
55664f32 974 int rc;
0853ad66 975
59089d8d 976 if (!dev->ethtool_ops->set_rxnfc)
0853ad66
SB		 977 return -EOPNOTSUPP;
978
bf988435
BH		 979 /* struct ethtool_rxnfc was originally defined for
980 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
981 * members. User-space might still be using that
982 * definition. */
983 if (cmd == ETHTOOL_SRXFH)
984 info_size = (offsetof(struct ethtool_rxnfc, data) +
985 sizeof(info.data));
986
987 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 988 return -EFAULT;
989
55664f32
BH		 990 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
991 if (rc)
992 return rc;
993
994 if (cmd == ETHTOOL_SRXCLSRLINS &&
995 copy_to_user(useraddr, &info, info_size))
996 return -EFAULT;
997
998 return 0;
0853ad66
SB		 999}
1000
97f8aefb 1001static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
bf988435 1002 u32 cmd, void __user *useraddr)
0853ad66
SB		 1003{
1004 struct ethtool_rxnfc info;
bf988435 1005 size_t info_size = sizeof(info);
59089d8d
SB		 1006 const struct ethtool_ops *ops = dev->ethtool_ops;
1007 int ret;
1008 void *rule_buf = NULL;
0853ad66 1009
59089d8d 1010 if (!ops->get_rxnfc)
0853ad66
SB		 1011 return -EOPNOTSUPP;
1012
bf988435
BH		 1013 /* struct ethtool_rxnfc was originally defined for
1014 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1015 * members. User-space might still be using that
1016 * definition. */
1017 if (cmd == ETHTOOL_GRXFH)
1018 info_size = (offsetof(struct ethtool_rxnfc, data) +
1019 sizeof(info.data));
1020
1021 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 1022 return -EFAULT;
1023
59089d8d
SB		 1024 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1025 if (info.rule_cnt > 0) {
db048b69 1026 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
ae6df5f9 1027 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
db048b69 1028 GFP_USER);
59089d8d
SB		 1029 if (!rule_buf)
1030 return -ENOMEM;
1031 }
1032 }
0853ad66 1033
59089d8d
SB		 1034 ret = ops->get_rxnfc(dev, &info, rule_buf);
1035 if (ret < 0)
1036 goto err_out;
1037
1038 ret = -EFAULT;
bf988435 1039 if (copy_to_user(useraddr, &info, info_size))
59089d8d
SB		 1040 goto err_out;
1041
1042 if (rule_buf) {
1043 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1044 if (copy_to_user(useraddr, rule_buf,
1045 info.rule_cnt * sizeof(u32)))
1046 goto err_out;
1047 }
1048 ret = 0;
1049
1050err_out:
c9caceca 1051 kfree(rule_buf);
59089d8d
SB		 1052
1053 return ret;
0853ad66
SB		 1054}
1055
3de0b592
VD		 1056static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1057 struct ethtool_rxnfc *rx_rings,
1058 u32 size)
1059{
fb95cd8d 1060 int i;
3de0b592
VD		 1061
1062 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
fb95cd8d 1063 return -EFAULT;
3de0b592
VD		 1064
1065 /* Validate ring indices */
fb95cd8d
BH		 1066 for (i = 0; i < size; i++)
1067 if (indir[i] >= rx_rings->data)
1068 return -EINVAL;
1069
1070 return 0;
3de0b592
VD		 1071}
1072
ba905f5e 1073u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
960fb622
ED		 1074
1075void netdev_rss_key_fill(void *buffer, size_t len)
1076{
1077 BUG_ON(len > sizeof(netdev_rss_key));
1078 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1079 memcpy(buffer, netdev_rss_key, len);
1080}
1081EXPORT_SYMBOL(netdev_rss_key_fill);
1082
d4ab4286
KJ		 1083static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1084{
1085 u32 dev_size, current_max = 0;
1086 u32 *indir;
1087 int ret;
1088
1089 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1090 !dev->ethtool_ops->get_rxfh)
1091 return -EOPNOTSUPP;
1092 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1093 if (dev_size == 0)
1094 return -EOPNOTSUPP;
1095
1096 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1097 if (!indir)
1098 return -ENOMEM;
1099
1100 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1101 if (ret)
1102 goto out;
1103
1104 while (dev_size--)
1105 current_max = max(current_max, indir[dev_size]);
1106
1107 *max = current_max;
1108
1109out:
1110 kfree(indir);
1111 return ret;
1112}
1113
a5b6ee29
BH		 1114static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1115 void __user *useraddr)
1116{
7850f63f
BH		 1117 u32 user_size, dev_size;
1118 u32 *indir;
a5b6ee29
BH		 1119 int ret;
1120
7850f63f 1121 if (!dev->ethtool_ops->get_rxfh_indir_size ||
fe62d001 1122 !dev->ethtool_ops->get_rxfh)
7850f63f
BH		 1123 return -EOPNOTSUPP;
1124 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1125 if (dev_size == 0)
a5b6ee29
BH		 1126 return -EOPNOTSUPP;
1127
7850f63f 1128 if (copy_from_user(&user_size,
a5b6ee29 1129 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1130 sizeof(user_size)))
a5b6ee29
BH		 1131 return -EFAULT;
1132
7850f63f
BH		 1133 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1134 &dev_size, sizeof(dev_size)))
1135 return -EFAULT;
1136
1137 /* If the user buffer size is 0, this is just a query for the
1138 * device table size. Otherwise, if it's smaller than the
1139 * device table size it's an error.
1140 */
1141 if (user_size < dev_size)
1142 return user_size == 0 ? 0 : -EINVAL;
1143
1144 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1145 if (!indir)
1146 return -ENOMEM;
1147
892311f6 1148 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
a5b6ee29
BH		 1149 if (ret)
1150 goto out;
1151
7850f63f
BH		 1152 if (copy_to_user(useraddr +
1153 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1154 indir, dev_size * sizeof(indir[0])))
a5b6ee29
BH		 1155 ret = -EFAULT;
1156
1157out:
1158 kfree(indir);
1159 return ret;
1160}
1161
1162static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1163 void __user *useraddr)
1164{
7850f63f
BH		 1165 struct ethtool_rxnfc rx_rings;
1166 u32 user_size, dev_size, i;
1167 u32 *indir;
c03a14e8 1168 const struct ethtool_ops *ops = dev->ethtool_ops;
a5b6ee29 1169 int ret;
3de0b592 1170 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
a5b6ee29 1171
fe62d001 1172 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
c03a14e8 1173 !ops->get_rxnfc)
7850f63f 1174 return -EOPNOTSUPP;
c03a14e8
JP		 1175
1176 dev_size = ops->get_rxfh_indir_size(dev);
7850f63f 1177 if (dev_size == 0)
a5b6ee29
BH		 1178 return -EOPNOTSUPP;
1179
7850f63f 1180 if (copy_from_user(&user_size,
a5b6ee29 1181 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1182 sizeof(user_size)))
a5b6ee29
BH		 1183 return -EFAULT;
1184
278bc429 1185 if (user_size != 0 && user_size != dev_size)
7850f63f
BH		 1186 return -EINVAL;
1187
1188 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1189 if (!indir)
1190 return -ENOMEM;
1191
7850f63f 1192 rx_rings.cmd = ETHTOOL_GRXRINGS;
c03a14e8 1193 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
7850f63f
BH		 1194 if (ret)
1195 goto out;
278bc429
BH		 1196
1197 if (user_size == 0) {
1198 for (i = 0; i < dev_size; i++)
1199 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1200 } else {
3de0b592
VD		 1201 ret = ethtool_copy_validate_indir(indir,
1202 useraddr + ringidx_offset,
1203 &rx_rings,
1204 dev_size);
1205 if (ret)
1206 goto out;
1207 }
1208
892311f6 1209 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
d4ab4286
KJ		 1210 if (ret)
1211 goto out;
1212
1213 /* indicate whether rxfh was set to default */
1214 if (user_size == 0)
1215 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1216 else
1217 dev->priv_flags |= IFF_RXFH_CONFIGURED;
3de0b592
VD		 1218
1219out:
1220 kfree(indir);
1221 return ret;
1222}
1223
1224static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1225 void __user *useraddr)
1226{
1227 int ret;
1228 const struct ethtool_ops *ops = dev->ethtool_ops;
f062a384 1229 u32 user_indir_size, user_key_size;
3de0b592 1230 u32 dev_indir_size = 0, dev_key_size = 0;
f062a384 1231 struct ethtool_rxfh rxfh;
3de0b592 1232 u32 total_size;
f062a384 1233 u32 indir_bytes;
3de0b592 1234 u32 *indir = NULL;
892311f6 1235 u8 dev_hfunc = 0;
3de0b592
VD		 1236 u8 *hkey = NULL;
1237 u8 *rss_config;
1238
892311f6 1239 if (!ops->get_rxfh)
3de0b592
VD		 1240 return -EOPNOTSUPP;
1241
1242 if (ops->get_rxfh_indir_size)
1243 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592
VD		 1244 if (ops->get_rxfh_key_size)
1245 dev_key_size = ops->get_rxfh_key_size(dev);
1246
f062a384 1247 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592 1248 return -EFAULT;
f062a384
BH		 1249 user_indir_size = rxfh.indir_size;
1250 user_key_size = rxfh.key_size;
3de0b592 1251
f062a384 1252 /* Check that reserved fields are 0 for now */
892311f6
EP		 1253 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1254 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1255 return -EINVAL;
1256
1257 rxfh.indir_size = dev_indir_size;
1258 rxfh.key_size = dev_key_size;
1259 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
3de0b592
VD		 1260 return -EFAULT;
1261
3de0b592
VD		 1262 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1263 (user_key_size && (user_key_size != dev_key_size)))
1264 return -EINVAL;
1265
1266 indir_bytes = user_indir_size * sizeof(indir[0]);
1267 total_size = indir_bytes + user_key_size;
1268 rss_config = kzalloc(total_size, GFP_USER);
1269 if (!rss_config)
1270 return -ENOMEM;
1271
1272 if (user_indir_size)
1273 indir = (u32 *)rss_config;
1274
1275 if (user_key_size)
1276 hkey = rss_config + indir_bytes;
1277
892311f6
EP		 1278 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1279 if (ret)
1280 goto out;
3de0b592 1281
892311f6
EP		 1282 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1283 &dev_hfunc, sizeof(rxfh.hfunc))) {
1284 ret = -EFAULT;
1285 } else if (copy_to_user(useraddr +
1286 offsetof(struct ethtool_rxfh, rss_config[0]),
1287 rss_config, total_size)) {
1288 ret = -EFAULT;
1289 }
1290out:
3de0b592
VD		 1291 kfree(rss_config);
1292
1293 return ret;
1294}
1295
1296static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1297 void __user *useraddr)
1298{
1299 int ret;
1300 const struct ethtool_ops *ops = dev->ethtool_ops;
1301 struct ethtool_rxnfc rx_rings;
f062a384
BH		 1302 struct ethtool_rxfh rxfh;
1303 u32 dev_indir_size = 0, dev_key_size = 0, i;
3de0b592
VD		 1304 u32 *indir = NULL, indir_bytes = 0;
1305 u8 *hkey = NULL;
1306 u8 *rss_config;
3de0b592
VD		 1307 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1308
892311f6 1309 if (!ops->get_rxnfc || !ops->set_rxfh)
3de0b592
VD		 1310 return -EOPNOTSUPP;
1311
1312 if (ops->get_rxfh_indir_size)
1313 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592 1314 if (ops->get_rxfh_key_size)
d340c862 1315 dev_key_size = ops->get_rxfh_key_size(dev);
3de0b592 1316
f062a384 1317 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592
VD		 1318 return -EFAULT;
1319
f062a384 1320 /* Check that reserved fields are 0 for now */
892311f6
EP		 1321 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1322 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1323 return -EINVAL;
1324
892311f6
EP		 1325 /* If either indir, hash key or function is valid, proceed further.
1326 * Must request at least one change: indir size, hash key or function.
3de0b592 1327 */
f062a384
BH		 1328 if ((rxfh.indir_size &&
1329 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1330 rxfh.indir_size != dev_indir_size) ||
1331 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1332 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
892311f6 1333 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
3de0b592
VD		 1334 return -EINVAL;
1335
f062a384 1336 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
3de0b592
VD		 1337 indir_bytes = dev_indir_size * sizeof(indir[0]);
1338
f062a384 1339 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
3de0b592
VD		 1340 if (!rss_config)
1341 return -ENOMEM;
1342
1343 rx_rings.cmd = ETHTOOL_GRXRINGS;
1344 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1345 if (ret)
1346 goto out;
1347
f062a384
BH		 1348 /* rxfh.indir_size == 0 means reset the indir table to default.
1349 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
3de0b592 1350 */
f062a384
BH		 1351 if (rxfh.indir_size &&
1352 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
3de0b592
VD		 1353 indir = (u32 *)rss_config;
1354 ret = ethtool_copy_validate_indir(indir,
1355 useraddr + rss_cfg_offset,
1356 &rx_rings,
f062a384 1357 rxfh.indir_size);
3de0b592 1358 if (ret)
7850f63f 1359 goto out;
f062a384 1360 } else if (rxfh.indir_size == 0) {
3de0b592
VD		 1361 indir = (u32 *)rss_config;
1362 for (i = 0; i < dev_indir_size; i++)
1363 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1364 }
278bc429 1365
f062a384 1366 if (rxfh.key_size) {
3de0b592
VD		 1367 hkey = rss_config + indir_bytes;
1368 if (copy_from_user(hkey,
1369 useraddr + rss_cfg_offset + indir_bytes,
f062a384 1370 rxfh.key_size)) {
3de0b592
VD		 1371 ret = -EFAULT;
1372 goto out;
278bc429 1373 }
7850f63f
BH		 1374 }
1375
892311f6 1376 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
d4ab4286
KJ		 1377 if (ret)
1378 goto out;
1379
1380 /* indicate whether rxfh was set to default */
1381 if (rxfh.indir_size == 0)
1382 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1383 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1384 dev->priv_flags |= IFF_RXFH_CONFIGURED;
a5b6ee29
BH		 1385
1386out:
3de0b592 1387 kfree(rss_config);
a5b6ee29
BH		 1388 return ret;
1389}
1390
1da177e4
LT		 1391static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1392{
1393 struct ethtool_regs regs;
76fd8593 1394 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 1395 void *regbuf;
1396 int reglen, ret;
1397
1398 if (!ops->get_regs || !ops->get_regs_len)
1399 return -EOPNOTSUPP;
1400
1401 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1402 return -EFAULT;
1403
1404 reglen = ops->get_regs_len(dev);
1405 if (regs.len > reglen)
1406 regs.len = reglen;
1407
3808d348
SG		 1408 regbuf = NULL;
1409 if (reglen) {
1410 regbuf = vzalloc(reglen);
1411 if (!regbuf)
1412 return -ENOMEM;
1413 }
1da177e4
LT		 1414
1415 ops->get_regs(dev, &regs, regbuf);
1416
1417 ret = -EFAULT;
1418 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1419 goto out;
1420 useraddr += offsetof(struct ethtool_regs, data);
67ae7cf1 1421 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1da177e4
LT		 1422 goto out;
1423 ret = 0;
1424
1425 out:
a77f5db3 1426 vfree(regbuf);
1da177e4
LT		 1427 return ret;
1428}
1429
d73d3a8c
BH		 1430static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1431{
1432 struct ethtool_value reset;
1433 int ret;
1434
1435 if (!dev->ethtool_ops->reset)
1436 return -EOPNOTSUPP;
1437
1438 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1439 return -EFAULT;
1440
1441 ret = dev->ethtool_ops->reset(dev, &reset.data);
1442 if (ret)
1443 return ret;
1444
1445 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1446 return -EFAULT;
1447 return 0;
1448}
1449
1da177e4
LT		 1450static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1451{
8e557421 1452 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1da177e4
LT		 1453
1454 if (!dev->ethtool_ops->get_wol)
1455 return -EOPNOTSUPP;
1456
1457 dev->ethtool_ops->get_wol(dev, &wol);
1458
1459 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1460 return -EFAULT;
1461 return 0;
1462}
1463
1464static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1465{
1466 struct ethtool_wolinfo wol;
1467
1468 if (!dev->ethtool_ops->set_wol)
1469 return -EOPNOTSUPP;
1470
1471 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1472 return -EFAULT;
1473
1474 return dev->ethtool_ops->set_wol(dev, &wol);
1475}
1476
80f12ecc
YM		 1477static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1478{
1479 struct ethtool_eee edata;
1480 int rc;
1481
1482 if (!dev->ethtool_ops->get_eee)
1483 return -EOPNOTSUPP;
1484
1485 memset(&edata, 0, sizeof(struct ethtool_eee));
1486 edata.cmd = ETHTOOL_GEEE;
1487 rc = dev->ethtool_ops->get_eee(dev, &edata);
1488
1489 if (rc)
1490 return rc;
1491
1492 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1493 return -EFAULT;
1494
1495 return 0;
1496}
1497
1498static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1499{
1500 struct ethtool_eee edata;
1501
1502 if (!dev->ethtool_ops->set_eee)
1503 return -EOPNOTSUPP;
1504
1505 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1506 return -EFAULT;
1507
1508 return dev->ethtool_ops->set_eee(dev, &edata);
1509}
1510
1da177e4
LT		 1511static int ethtool_nway_reset(struct net_device *dev)
1512{
1513 if (!dev->ethtool_ops->nway_reset)
1514 return -EOPNOTSUPP;
1515
1516 return dev->ethtool_ops->nway_reset(dev);
1517}
1518
e596e6e4
BH		 1519static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1520{
1521 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1522
1523 if (!dev->ethtool_ops->get_link)
1524 return -EOPNOTSUPP;
1525
1526 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1527
1528 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1529 return -EFAULT;
1530 return 0;
1531}
1532
081d094e
BH		 1533static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1534 int (*getter)(struct net_device *,
1535 struct ethtool_eeprom *, u8 *),
1536 u32 total_len)
1da177e4
LT		 1537{
1538 struct ethtool_eeprom eeprom;
b131dd5d
MSB		 1539 void __user *userbuf = useraddr + sizeof(eeprom);
1540 u32 bytes_remaining;
1da177e4 1541 u8 *data;
b131dd5d 1542 int ret = 0;
1da177e4 1543
1da177e4
LT		 1544 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1545 return -EFAULT;
1546
1547 /* Check for wrap and zero */
1548 if (eeprom.offset + eeprom.len <= eeprom.offset)
1549 return -EINVAL;
1550
1551 /* Check for exceeding total eeprom len */
081d094e 1552 if (eeprom.offset + eeprom.len > total_len)
1da177e4
LT		 1553 return -EINVAL;
1554
b131dd5d 1555 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1556 if (!data)
1557 return -ENOMEM;
1558
b131dd5d
MSB		 1559 bytes_remaining = eeprom.len;
1560 while (bytes_remaining > 0) {
1561 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1562
081d094e 1563 ret = getter(dev, &eeprom, data);
b131dd5d
MSB		 1564 if (ret)
1565 break;
1566 if (copy_to_user(userbuf, data, eeprom.len)) {
1567 ret = -EFAULT;
1568 break;
1569 }
1570 userbuf += eeprom.len;
1571 eeprom.offset += eeprom.len;
1572 bytes_remaining -= eeprom.len;
1573 }
1da177e4 1574
c5835df9
MSB		 1575 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1576 eeprom.offset -= eeprom.len;
1577 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1578 ret = -EFAULT;
1579
1da177e4
LT		 1580 kfree(data);
1581 return ret;
1582}
1583
081d094e
BH		 1584static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1585{
1586 const struct ethtool_ops *ops = dev->ethtool_ops;
1587
e0fb6fb6
GR		 1588 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1589 !ops->get_eeprom_len(dev))
081d094e
BH		 1590 return -EOPNOTSUPP;
1591
1592 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1593 ops->get_eeprom_len(dev));
1594}
1595
1da177e4
LT		 1596static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1597{
1598 struct ethtool_eeprom eeprom;
76fd8593 1599 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 1600 void __user *userbuf = useraddr + sizeof(eeprom);
1601 u32 bytes_remaining;
1da177e4 1602 u8 *data;
b131dd5d 1603 int ret = 0;
1da177e4 1604
e0fb6fb6
GR		 1605 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1606 !ops->get_eeprom_len(dev))
1da177e4
LT		 1607 return -EOPNOTSUPP;
1608
1609 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1610 return -EFAULT;
1611
1612 /* Check for wrap and zero */
1613 if (eeprom.offset + eeprom.len <= eeprom.offset)
1614 return -EINVAL;
1615
1616 /* Check for exceeding total eeprom len */
1617 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1618 return -EINVAL;
1619
b131dd5d 1620 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1621 if (!data)
1622 return -ENOMEM;
1623
b131dd5d
MSB		 1624 bytes_remaining = eeprom.len;
1625 while (bytes_remaining > 0) {
1626 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1627
1628 if (copy_from_user(data, userbuf, eeprom.len)) {
1629 ret = -EFAULT;
1630 break;
1631 }
1632 ret = ops->set_eeprom(dev, &eeprom, data);
1633 if (ret)
1634 break;
1635 userbuf += eeprom.len;
1636 eeprom.offset += eeprom.len;
1637 bytes_remaining -= eeprom.len;
1638 }
1da177e4 1639
1da177e4
LT		 1640 kfree(data);
1641 return ret;
1642}
1643
97f8aefb 1644static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1645 void __user *useraddr)
1da177e4 1646{
8e557421 1647 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1da177e4
LT		 1648
1649 if (!dev->ethtool_ops->get_coalesce)
1650 return -EOPNOTSUPP;
1651
1652 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1653
1654 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1655 return -EFAULT;
1656 return 0;
1657}
1658
97f8aefb 1659static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1660 void __user *useraddr)
1da177e4
LT		 1661{
1662 struct ethtool_coalesce coalesce;
1663
fa04ae5c 1664 if (!dev->ethtool_ops->set_coalesce)
1da177e4
LT		 1665 return -EOPNOTSUPP;
1666
1667 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1668 return -EFAULT;
1669
1670 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1671}
1672
1673static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1674{
8e557421 1675 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1da177e4
LT		 1676
1677 if (!dev->ethtool_ops->get_ringparam)
1678 return -EOPNOTSUPP;
1679
1680 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1681
1682 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1683 return -EFAULT;
1684 return 0;
1685}
1686
1687static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1688{
1689 struct ethtool_ringparam ringparam;
1690
1691 if (!dev->ethtool_ops->set_ringparam)
1692 return -EOPNOTSUPP;
1693
1694 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1695 return -EFAULT;
1696
1697 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1698}
1699
8b5933c3 1700static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1701 void __user *useraddr)
1702{
1703 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1704
1705 if (!dev->ethtool_ops->get_channels)
1706 return -EOPNOTSUPP;
1707
1708 dev->ethtool_ops->get_channels(dev, &channels);
1709
1710 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1711 return -EFAULT;
1712 return 0;
1713}
1714
1715static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1716 void __user *useraddr)
1717{
31a86d13 1718 struct ethtool_channels channels, max = { .cmd = ETHTOOL_GCHANNELS };
d4ab4286 1719 u32 max_rx_in_use = 0;
8b5933c3 1720
8bf36862 1721 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
8b5933c3 1722 return -EOPNOTSUPP;
1723
1724 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1725 return -EFAULT;
1726
8bf36862
KJ		 1727 dev->ethtool_ops->get_channels(dev, &max);
1728
1729 /* ensure new counts are within the maximums */
1730 if ((channels.rx_count > max.max_rx) ||
1731 (channels.tx_count > max.max_tx) ||
1732 (channels.combined_count > max.max_combined) ||
1733 (channels.other_count > max.max_other))
1734 return -EINVAL;
1735
d4ab4286
KJ		 1736 /* ensure the new Rx count fits within the configured Rx flow
1737 * indirection table settings */
1738 if (netif_is_rxfh_configured(dev) &&
1739 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1740 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1741 return -EINVAL;
1742
8b5933c3 1743 return dev->ethtool_ops->set_channels(dev, &channels);
1744}
1745
1da177e4
LT		 1746static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1747{
1748 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1749
1750 if (!dev->ethtool_ops->get_pauseparam)
1751 return -EOPNOTSUPP;
1752
1753 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1754
1755 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1756 return -EFAULT;
1757 return 0;
1758}
1759
1760static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1761{
1762 struct ethtool_pauseparam pauseparam;
1763
e1b90c41 1764 if (!dev->ethtool_ops->set_pauseparam)
1da177e4
LT		 1765 return -EOPNOTSUPP;
1766
1767 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1768 return -EFAULT;
1769
1770 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1771}
1772
1da177e4
LT		 1773static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1774{
1775 struct ethtool_test test;
76fd8593 1776 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1777 u64 *data;
ff03d49f 1778 int ret, test_len;
1da177e4 1779
a9828ec6 1780 if (!ops->self_test || !ops->get_sset_count)
1da177e4
LT		 1781 return -EOPNOTSUPP;
1782
a9828ec6 1783 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
ff03d49f
JG		 1784 if (test_len < 0)
1785 return test_len;
1786 WARN_ON(test_len == 0);
1787
1da177e4
LT		 1788 if (copy_from_user(&test, useraddr, sizeof(test)))
1789 return -EFAULT;
1790
ff03d49f
JG		 1791 test.len = test_len;
1792 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1da177e4
LT		 1793 if (!data)
1794 return -ENOMEM;
1795
1796 ops->self_test(dev, &test, data);
1797
1798 ret = -EFAULT;
1799 if (copy_to_user(useraddr, &test, sizeof(test)))
1800 goto out;
1801 useraddr += sizeof(test);
1802 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1803 goto out;
1804 ret = 0;
1805
1806 out:
1807 kfree(data);
1808 return ret;
1809}
1810
1811static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1812{
1813 struct ethtool_gstrings gstrings;
1da177e4
LT		 1814 u8 *data;
1815 int ret;
1816
1da177e4
LT		 1817 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1818 return -EFAULT;
1819
340ae165 1820 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
a9828ec6
BH		 1821 if (ret < 0)
1822 return ret;
1823
1824 gstrings.len = ret;
1da177e4 1825
077cb37f 1826 data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
1da177e4
LT		 1827 if (!data)
1828 return -ENOMEM;
1829
340ae165 1830 __ethtool_get_strings(dev, gstrings.string_set, data);
1da177e4
LT		 1831
1832 ret = -EFAULT;
1833 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1834 goto out;
1835 useraddr += sizeof(gstrings);
1836 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1837 goto out;
1838 ret = 0;
1839
340ae165 1840out:
1da177e4
LT		 1841 kfree(data);
1842 return ret;
1843}
1844
1845static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1846{
1847 struct ethtool_value id;
68f512f2 1848 static bool busy;
c03a14e8 1849 const struct ethtool_ops *ops = dev->ethtool_ops;
68f512f2 1850 int rc;
1da177e4 1851
c03a14e8 1852 if (!ops->set_phys_id)
1da177e4
LT		 1853 return -EOPNOTSUPP;
1854
68f512f2
BH		 1855 if (busy)
1856 return -EBUSY;
1857
1da177e4
LT		 1858 if (copy_from_user(&id, useraddr, sizeof(id)))
1859 return -EFAULT;
1860
c03a14e8 1861 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
fce55922 1862 if (rc < 0)
68f512f2
BH		 1863 return rc;
1864
1865 /* Drop the RTNL lock while waiting, but prevent reentry or
1866 * removal of the device.
1867 */
1868 busy = true;
1869 dev_hold(dev);
1870 rtnl_unlock();
1871
1872 if (rc == 0) {
1873 /* Driver will handle this itself */
1874 schedule_timeout_interruptible(
143780c6 1875 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
68f512f2 1876 } else {
fce55922
AB		 1877 /* Driver expects to be called at twice the frequency in rc */
1878 int n = rc * 2, i, interval = HZ / n;
1879
1880 /* Count down seconds */
68f512f2 1881 do {
fce55922
AB		 1882 /* Count down iterations per second */
1883 i = n;
1884 do {
1885 rtnl_lock();
c03a14e8 1886 rc = ops->set_phys_id(dev,
fce55922
AB		 1887 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1888 rtnl_unlock();
1889 if (rc)
1890 break;
1891 schedule_timeout_interruptible(interval);
1892 } while (!signal_pending(current) && --i != 0);
68f512f2
BH		 1893 } while (!signal_pending(current) &&
1894 (id.data == 0 || --id.data != 0));
1895 }
1896
1897 rtnl_lock();
1898 dev_put(dev);
1899 busy = false;
1900
c03a14e8 1901 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
68f512f2 1902 return rc;
1da177e4
LT		 1903}
1904
1905static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1906{
1907 struct ethtool_stats stats;
76fd8593 1908 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1909 u64 *data;
ff03d49f 1910 int ret, n_stats;
1da177e4 1911
a9828ec6 1912 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1da177e4
LT		 1913 return -EOPNOTSUPP;
1914
a9828ec6 1915 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
ff03d49f
JG		 1916 if (n_stats < 0)
1917 return n_stats;
1918 WARN_ON(n_stats == 0);
1919
1da177e4
LT		 1920 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1921 return -EFAULT;
1922
ff03d49f
JG		 1923 stats.n_stats = n_stats;
1924 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1da177e4
LT		 1925 if (!data)
1926 return -ENOMEM;
1927
1928 ops->get_ethtool_stats(dev, &stats, data);
1929
1930 ret = -EFAULT;
1931 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1932 goto out;
1933 useraddr += sizeof(stats);
1934 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1935 goto out;
1936 ret = 0;
1937
1938 out:
1939 kfree(data);
1940 return ret;
1941}
1942
f3a40945
AL		 1943static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1944{
1945 struct ethtool_stats stats;
1946 struct phy_device *phydev = dev->phydev;
1947 u64 *data;
1948 int ret, n_stats;
1949
1950 if (!phydev)
1951 return -EOPNOTSUPP;
1952
1953 n_stats = phy_get_sset_count(phydev);
1954
1955 if (n_stats < 0)
1956 return n_stats;
1957 WARN_ON(n_stats == 0);
1958
1959 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1960 return -EFAULT;
1961
1962 stats.n_stats = n_stats;
1963 data = kmalloc_array(n_stats, sizeof(u64), GFP_USER);
1964 if (!data)
1965 return -ENOMEM;
1966
1967 mutex_lock(&phydev->lock);
1968 phydev->drv->get_stats(phydev, &stats, data);
1969 mutex_unlock(&phydev->lock);
1970
1971 ret = -EFAULT;
1972 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1973 goto out;
1974 useraddr += sizeof(stats);
1975 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1976 goto out;
1977 ret = 0;
1978
1979 out:
1980 kfree(data);
1981 return ret;
1982}
1983
0bf0519d 1984static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
a6f9a705
JW		 1985{
1986 struct ethtool_perm_addr epaddr;
a6f9a705 1987
313674af 1988 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
a6f9a705
JW		 1989 return -EFAULT;
1990
313674af
MW		 1991 if (epaddr.size < dev->addr_len)
1992 return -ETOOSMALL;
1993 epaddr.size = dev->addr_len;
a6f9a705 1994
a6f9a705 1995 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
313674af 1996 return -EFAULT;
a6f9a705 1997 useraddr += sizeof(epaddr);
313674af
MW		 1998 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1999 return -EFAULT;
2000 return 0;
a6f9a705
JW		 2001}
2002
13c99b24
JG		 2003static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2004 u32 cmd, u32 (*actor)(struct net_device *))
3ae7c0b2 2005{
8e557421 2006 struct ethtool_value edata = { .cmd = cmd };
3ae7c0b2 2007
13c99b24 2008 if (!actor)
3ae7c0b2
JG		 2009 return -EOPNOTSUPP;
2010
13c99b24 2011 edata.data = actor(dev);
3ae7c0b2
JG		 2012
2013 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2014 return -EFAULT;
2015 return 0;
2016}
2017
13c99b24
JG		 2018static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2019 void (*actor)(struct net_device *, u32))
3ae7c0b2
JG		 2020{
2021 struct ethtool_value edata;
2022
13c99b24 2023 if (!actor)
3ae7c0b2
JG		 2024 return -EOPNOTSUPP;
2025
2026 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2027 return -EFAULT;
2028
13c99b24 2029 actor(dev, edata.data);
339bf024
JG		 2030 return 0;
2031}
2032
13c99b24
JG		 2033static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2034 int (*actor)(struct net_device *, u32))
339bf024
JG		 2035{
2036 struct ethtool_value edata;
2037
13c99b24 2038 if (!actor)
339bf024
JG		 2039 return -EOPNOTSUPP;
2040
2041 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2042 return -EFAULT;
2043
13c99b24 2044 return actor(dev, edata.data);
339bf024
JG		 2045}
2046
97f8aefb 2047static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2048 char __user *useraddr)
05c6a8d7
AK		 2049{
2050 struct ethtool_flash efl;
2051
2052 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2053 return -EFAULT;
2054
2055 if (!dev->ethtool_ops->flash_device)
2056 return -EOPNOTSUPP;
2057
786f5281
BH		 2058 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2059
05c6a8d7
AK		 2060 return dev->ethtool_ops->flash_device(dev, &efl);
2061}
2062
29dd54b7
AC		 2063static int ethtool_set_dump(struct net_device *dev,
2064 void __user *useraddr)
2065{
2066 struct ethtool_dump dump;
2067
2068 if (!dev->ethtool_ops->set_dump)
2069 return -EOPNOTSUPP;
2070
2071 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2072 return -EFAULT;
2073
2074 return dev->ethtool_ops->set_dump(dev, &dump);
2075}
2076
2077static int ethtool_get_dump_flag(struct net_device *dev,
2078 void __user *useraddr)
2079{
2080 int ret;
2081 struct ethtool_dump dump;
2082 const struct ethtool_ops *ops = dev->ethtool_ops;
2083
c03a14e8 2084 if (!ops->get_dump_flag)
29dd54b7
AC		 2085 return -EOPNOTSUPP;
2086
2087 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2088 return -EFAULT;
2089
2090 ret = ops->get_dump_flag(dev, &dump);
2091 if (ret)
2092 return ret;
2093
2094 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2095 return -EFAULT;
2096 return 0;
2097}
2098
2099static int ethtool_get_dump_data(struct net_device *dev,
2100 void __user *useraddr)
2101{
2102 int ret;
2103 __u32 len;
2104 struct ethtool_dump dump, tmp;
2105 const struct ethtool_ops *ops = dev->ethtool_ops;
2106 void *data = NULL;
2107
c03a14e8 2108 if (!ops->get_dump_data || !ops->get_dump_flag)
29dd54b7
AC		 2109 return -EOPNOTSUPP;
2110
2111 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2112 return -EFAULT;
2113
2114 memset(&tmp, 0, sizeof(tmp));
2115 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2116 ret = ops->get_dump_flag(dev, &tmp);
2117 if (ret)
2118 return ret;
2119
c590b5e2 2120 len = min(tmp.len, dump.len);
29dd54b7
AC		 2121 if (!len)
2122 return -EFAULT;
2123
c590b5e2
MS		 2124 /* Don't ever let the driver think there's more space available
2125 * than it requested with .get_dump_flag().
2126 */
2127 dump.len = len;
2128
2129 /* Always allocate enough space to hold the whole thing so that the
2130 * driver does not need to check the length and bother with partial
2131 * dumping.
2132 */
29dd54b7
AC		 2133 data = vzalloc(tmp.len);
2134 if (!data)
2135 return -ENOMEM;
2136 ret = ops->get_dump_data(dev, &dump, data);
2137 if (ret)
2138 goto out;
2139
c590b5e2
MS		 2140 /* There are two sane possibilities:
2141 * 1. The driver's .get_dump_data() does not touch dump.len.
2142 * 2. Or it may set dump.len to how much it really writes, which
2143 * should be tmp.len (or len if it can do a partial dump).
2144 * In any case respond to userspace with the actual length of data
2145 * it's receiving.
2146 */
2147 WARN_ON(dump.len != len && dump.len != tmp.len);
2148 dump.len = len;
2149
29dd54b7
AC		 2150 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2151 ret = -EFAULT;
2152 goto out;
2153 }
2154 useraddr += offsetof(struct ethtool_dump, data);
2155 if (copy_to_user(useraddr, data, len))
2156 ret = -EFAULT;
2157out:
2158 vfree(data);
2159 return ret;
2160}
2161
c8f3a8c3
RC		 2162static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2163{
2164 int err = 0;
2165 struct ethtool_ts_info info;
2166 const struct ethtool_ops *ops = dev->ethtool_ops;
2167 struct phy_device *phydev = dev->phydev;
2168
2169 memset(&info, 0, sizeof(info));
2170 info.cmd = ETHTOOL_GET_TS_INFO;
2171
2172 if (phydev && phydev->drv && phydev->drv->ts_info) {
c8f3a8c3 2173 err = phydev->drv->ts_info(phydev, &info);
c03a14e8 2174 } else if (ops->get_ts_info) {
c8f3a8c3 2175 err = ops->get_ts_info(dev, &info);
c8f3a8c3
RC		 2176 } else {
2177 info.so_timestamping =
2178 SOF_TIMESTAMPING_RX_SOFTWARE |
2179 SOF_TIMESTAMPING_SOFTWARE;
2180 info.phc_index = -1;
2181 }
2182
2183 if (err)
2184 return err;
2185
2186 if (copy_to_user(useraddr, &info, sizeof(info)))
2187 err = -EFAULT;
2188
2189 return err;
2190}
2191
2f438366
ES		 2192static int __ethtool_get_module_info(struct net_device *dev,
2193 struct ethtool_modinfo *modinfo)
2194{
2195 const struct ethtool_ops *ops = dev->ethtool_ops;
2196 struct phy_device *phydev = dev->phydev;
2197
2198 if (phydev && phydev->drv && phydev->drv->module_info)
2199 return phydev->drv->module_info(phydev, modinfo);
2200
2201 if (ops->get_module_info)
2202 return ops->get_module_info(dev, modinfo);
2203
2204 return -EOPNOTSUPP;
2205}
2206
41c3cb6d
SH		 2207static int ethtool_get_module_info(struct net_device *dev,
2208 void __user *useraddr)
2209{
2210 int ret;
2211 struct ethtool_modinfo modinfo;
41c3cb6d
SH		 2212
2213 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2214 return -EFAULT;
2215
2f438366 2216 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2217 if (ret)
2218 return ret;
2219
2220 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2221 return -EFAULT;
2222
2223 return 0;
2224}
2225
2f438366
ES		 2226static int __ethtool_get_module_eeprom(struct net_device *dev,
2227 struct ethtool_eeprom *ee, u8 *data)
2228{
2229 const struct ethtool_ops *ops = dev->ethtool_ops;
2230 struct phy_device *phydev = dev->phydev;
2231
2232 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2233 return phydev->drv->module_eeprom(phydev, ee, data);
2234
2235 if (ops->get_module_eeprom)
2236 return ops->get_module_eeprom(dev, ee, data);
2237
2238 return -EOPNOTSUPP;
2239}
2240
41c3cb6d
SH		 2241static int ethtool_get_module_eeprom(struct net_device *dev,
2242 void __user *useraddr)
2243{
2244 int ret;
2245 struct ethtool_modinfo modinfo;
41c3cb6d 2246
2f438366 2247 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2248 if (ret)
2249 return ret;
2250
2f438366
ES		 2251 return ethtool_get_any_eeprom(dev, useraddr,
2252 __ethtool_get_module_eeprom,
41c3cb6d
SH		 2253 modinfo.eeprom_len);
2254}
2255
f0db9b07
GV		 2256static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2257{
2258 switch (tuna->id) {
2259 case ETHTOOL_RX_COPYBREAK:
1255a505 2260 case ETHTOOL_TX_COPYBREAK:
f0db9b07
GV		 2261 if (tuna->len != sizeof(u32) ||
2262 tuna->type_id != ETHTOOL_TUNABLE_U32)
2263 return -EINVAL;
2264 break;
2265 default:
2266 return -EINVAL;
2267 }
2268
2269 return 0;
2270}
2271
2272static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2273{
2274 int ret;
2275 struct ethtool_tunable tuna;
2276 const struct ethtool_ops *ops = dev->ethtool_ops;
2277 void *data;
2278
2279 if (!ops->get_tunable)
2280 return -EOPNOTSUPP;
2281 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2282 return -EFAULT;
2283 ret = ethtool_tunable_valid(&tuna);
2284 if (ret)
2285 return ret;
2286 data = kmalloc(tuna.len, GFP_USER);
2287 if (!data)
2288 return -ENOMEM;
2289 ret = ops->get_tunable(dev, &tuna, data);
2290 if (ret)
2291 goto out;
2292 useraddr += sizeof(tuna);
2293 ret = -EFAULT;
2294 if (copy_to_user(useraddr, data, tuna.len))
2295 goto out;
2296 ret = 0;
2297
2298out:
2299 kfree(data);
2300 return ret;
2301}
2302
2303static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2304{
2305 int ret;
2306 struct ethtool_tunable tuna;
2307 const struct ethtool_ops *ops = dev->ethtool_ops;
2308 void *data;
2309
2310 if (!ops->set_tunable)
2311 return -EOPNOTSUPP;
2312 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2313 return -EFAULT;
2314 ret = ethtool_tunable_valid(&tuna);
2315 if (ret)
2316 return ret;
2317 data = kmalloc(tuna.len, GFP_USER);
2318 if (!data)
2319 return -ENOMEM;
2320 useraddr += sizeof(tuna);
2321 ret = -EFAULT;
2322 if (copy_from_user(data, useraddr, tuna.len))
2323 goto out;
2324 ret = ops->set_tunable(dev, &tuna, data);
2325
2326out:
2327 kfree(data);
2328 return ret;
2329}
2330
421797b1
KL		 2331static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2332 void __user *useraddr,
2333 struct ethtool_per_queue_op *per_queue_opt)
2334{
2335 u32 bit;
2336 int ret;
2337 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2338
2339 if (!dev->ethtool_ops->get_per_queue_coalesce)
2340 return -EOPNOTSUPP;
2341
2342 useraddr += sizeof(*per_queue_opt);
2343
2344 bitmap_from_u32array(queue_mask,
2345 MAX_NUM_QUEUE,
2346 per_queue_opt->queue_mask,
2347 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2348
2349 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2350 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2351
2352 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2353 if (ret != 0)
2354 return ret;
2355 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2356 return -EFAULT;
2357 useraddr += sizeof(coalesce);
2358 }
2359
2360 return 0;
2361}
2362
f38d138a
KL		 2363static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2364 void __user *useraddr,
2365 struct ethtool_per_queue_op *per_queue_opt)
2366{
2367 u32 bit;
2368 int i, ret = 0;
2369 int n_queue;
2370 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2371 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2372
2373 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2374 (!dev->ethtool_ops->get_per_queue_coalesce))
2375 return -EOPNOTSUPP;
2376
2377 useraddr += sizeof(*per_queue_opt);
2378
2379 bitmap_from_u32array(queue_mask,
2380 MAX_NUM_QUEUE,
2381 per_queue_opt->queue_mask,
2382 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2383 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2384 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2385 if (!backup)
2386 return -ENOMEM;
2387
2388 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2389 struct ethtool_coalesce coalesce;
2390
2391 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2392 if (ret != 0)
2393 goto roll_back;
2394
2395 tmp++;
2396
2397 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2398 ret = -EFAULT;
2399 goto roll_back;
2400 }
2401
2402 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2403 if (ret != 0)
2404 goto roll_back;
2405
2406 useraddr += sizeof(coalesce);
2407 }
2408
2409roll_back:
2410 if (ret != 0) {
2411 tmp = backup;
2412 for_each_set_bit(i, queue_mask, bit) {
2413 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2414 tmp++;
2415 }
2416 }
2417 kfree(backup);
2418
2419 return ret;
2420}
2421
ac2c7ad0
KL		 2422static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2423{
2424 struct ethtool_per_queue_op per_queue_opt;
2425
2426 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2427 return -EFAULT;
2428
2429 switch (per_queue_opt.sub_command) {
421797b1
KL		 2430 case ETHTOOL_GCOALESCE:
2431 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
f38d138a
KL		 2432 case ETHTOOL_SCOALESCE:
2433 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
ac2c7ad0
KL		 2434 default:
2435 return -EOPNOTSUPP;
2436 };
2437}
2438
968ad9da
RL		 2439static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2440{
2441 switch (tuna->id) {
65feddd5
RL		 2442 case ETHTOOL_PHY_DOWNSHIFT:
2443 if (tuna->len != sizeof(u8) ||
2444 tuna->type_id != ETHTOOL_TUNABLE_U8)
2445 return -EINVAL;
2446 break;
968ad9da
RL		 2447 default:
2448 return -EINVAL;
2449 }
2450
2451 return 0;
2452}
2453
2454static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2455{
2456 int ret;
2457 struct ethtool_tunable tuna;
2458 struct phy_device *phydev = dev->phydev;
2459 void *data;
2460
2461 if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2462 return -EOPNOTSUPP;
2463
2464 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2465 return -EFAULT;
2466 ret = ethtool_phy_tunable_valid(&tuna);
2467 if (ret)
2468 return ret;
2469 data = kmalloc(tuna.len, GFP_USER);
2470 if (!data)
2471 return -ENOMEM;
4b65246b 2472 mutex_lock(&phydev->lock);
968ad9da 2473 ret = phydev->drv->get_tunable(phydev, &tuna, data);
4b65246b 2474 mutex_unlock(&phydev->lock);
968ad9da
RL		 2475 if (ret)
2476 goto out;
2477 useraddr += sizeof(tuna);
2478 ret = -EFAULT;
2479 if (copy_to_user(useraddr, data, tuna.len))
2480 goto out;
2481 ret = 0;
2482
2483out:
2484 kfree(data);
2485 return ret;
2486}
2487
2488static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2489{
2490 int ret;
2491 struct ethtool_tunable tuna;
2492 struct phy_device *phydev = dev->phydev;
2493 void *data;
2494
2495 if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2496 return -EOPNOTSUPP;
2497 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2498 return -EFAULT;
2499 ret = ethtool_phy_tunable_valid(&tuna);
2500 if (ret)
2501 return ret;
2502 data = kmalloc(tuna.len, GFP_USER);
2503 if (!data)
2504 return -ENOMEM;
2505 useraddr += sizeof(tuna);
2506 ret = -EFAULT;
2507 if (copy_from_user(data, useraddr, tuna.len))
2508 goto out;
4b65246b 2509 mutex_lock(&phydev->lock);
968ad9da 2510 ret = phydev->drv->set_tunable(phydev, &tuna, data);
4b65246b 2511 mutex_unlock(&phydev->lock);
968ad9da
RL		 2512
2513out:
2514 kfree(data);
2515 return ret;
2516}
2517
600fed5e 2518/* The main entry point in this file. Called from net/core/dev_ioctl.c */
1da177e4 2519
881d966b 2520int dev_ethtool(struct net *net, struct ifreq *ifr)
1da177e4 2521{
881d966b 2522 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1da177e4 2523 void __user *useraddr = ifr->ifr_data;
ac2c7ad0 2524 u32 ethcmd, sub_cmd;
1da177e4 2525 int rc;
b29d3145 2526 netdev_features_t old_features;
1da177e4 2527
1da177e4
LT		 2528 if (!dev || !netif_device_present(dev))
2529 return -ENODEV;
2530
97f8aefb 2531 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1da177e4
LT		 2532 return -EFAULT;
2533
ac2c7ad0
KL		 2534 if (ethcmd == ETHTOOL_PERQUEUE) {
2535 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2536 return -EFAULT;
2537 } else {
2538 sub_cmd = ethcmd;
2539 }
75f3123c 2540 /* Allow some commands to be done by anyone */
ac2c7ad0 2541 switch (sub_cmd) {
0fdc100b 2542 case ETHTOOL_GSET:
75f3123c 2543 case ETHTOOL_GDRVINFO:
75f3123c 2544 case ETHTOOL_GMSGLVL:
2da45db2 2545 case ETHTOOL_GLINK:
75f3123c
SH		 2546 case ETHTOOL_GCOALESCE:
2547 case ETHTOOL_GRINGPARAM:
2548 case ETHTOOL_GPAUSEPARAM:
2549 case ETHTOOL_GRXCSUM:
2550 case ETHTOOL_GTXCSUM:
2551 case ETHTOOL_GSG:
f80400a2 2552 case ETHTOOL_GSSET_INFO:
75f3123c 2553 case ETHTOOL_GSTRINGS:
2da45db2 2554 case ETHTOOL_GSTATS:
f3a40945 2555 case ETHTOOL_GPHYSTATS:
75f3123c
SH		 2556 case ETHTOOL_GTSO:
2557 case ETHTOOL_GPERMADDR:
2558 case ETHTOOL_GUFO:
2559 case ETHTOOL_GGSO:
1cab819b 2560 case ETHTOOL_GGRO:
339bf024
JG		 2561 case ETHTOOL_GFLAGS:
2562 case ETHTOOL_GPFLAGS:
0853ad66 2563 case ETHTOOL_GRXFH:
59089d8d
SB		 2564 case ETHTOOL_GRXRINGS:
2565 case ETHTOOL_GRXCLSRLCNT:
2566 case ETHTOOL_GRXCLSRULE:
2567 case ETHTOOL_GRXCLSRLALL:
2da45db2 2568 case ETHTOOL_GRXFHINDIR:
3de0b592 2569 case ETHTOOL_GRSSH:
5455c699 2570 case ETHTOOL_GFEATURES:
2da45db2 2571 case ETHTOOL_GCHANNELS:
c8f3a8c3 2572 case ETHTOOL_GET_TS_INFO:
2da45db2 2573 case ETHTOOL_GEEE:
f0db9b07 2574 case ETHTOOL_GTUNABLE:
968ad9da 2575 case ETHTOOL_PHY_GTUNABLE:
8006f6bf 2576 case ETHTOOL_GLINKSETTINGS:
75f3123c
SH		 2577 break;
2578 default:
5e1fccc0 2579 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
75f3123c
SH		 2580 return -EPERM;
2581 }
2582
97f8aefb 2583 if (dev->ethtool_ops->begin) {
2584 rc = dev->ethtool_ops->begin(dev);
2585 if (rc < 0)
1da177e4 2586 return rc;
97f8aefb 2587 }
d8a33ac4
SH		 2588 old_features = dev->features;
2589
1da177e4
LT		 2590 switch (ethcmd) {
2591 case ETHTOOL_GSET:
2592 rc = ethtool_get_settings(dev, useraddr);
2593 break;
2594 case ETHTOOL_SSET:
2595 rc = ethtool_set_settings(dev, useraddr);
2596 break;
2597 case ETHTOOL_GDRVINFO:
2598 rc = ethtool_get_drvinfo(dev, useraddr);
1da177e4
LT		 2599 break;
2600 case ETHTOOL_GREGS:
2601 rc = ethtool_get_regs(dev, useraddr);
2602 break;
2603 case ETHTOOL_GWOL:
2604 rc = ethtool_get_wol(dev, useraddr);
2605 break;
2606 case ETHTOOL_SWOL:
2607 rc = ethtool_set_wol(dev, useraddr);
2608 break;
2609 case ETHTOOL_GMSGLVL:
13c99b24
JG		 2610 rc = ethtool_get_value(dev, useraddr, ethcmd,
2611 dev->ethtool_ops->get_msglevel);
1da177e4
LT		 2612 break;
2613 case ETHTOOL_SMSGLVL:
13c99b24
JG		 2614 rc = ethtool_set_value_void(dev, useraddr,
2615 dev->ethtool_ops->set_msglevel);
1da177e4 2616 break;
80f12ecc
YM		 2617 case ETHTOOL_GEEE:
2618 rc = ethtool_get_eee(dev, useraddr);
2619 break;
2620 case ETHTOOL_SEEE:
2621 rc = ethtool_set_eee(dev, useraddr);
2622 break;
1da177e4
LT		 2623 case ETHTOOL_NWAY_RST:
2624 rc = ethtool_nway_reset(dev);
2625 break;
2626 case ETHTOOL_GLINK:
e596e6e4 2627 rc = ethtool_get_link(dev, useraddr);
1da177e4
LT		 2628 break;
2629 case ETHTOOL_GEEPROM:
2630 rc = ethtool_get_eeprom(dev, useraddr);
2631 break;
2632 case ETHTOOL_SEEPROM:
2633 rc = ethtool_set_eeprom(dev, useraddr);
2634 break;
2635 case ETHTOOL_GCOALESCE:
2636 rc = ethtool_get_coalesce(dev, useraddr);
2637 break;
2638 case ETHTOOL_SCOALESCE:
2639 rc = ethtool_set_coalesce(dev, useraddr);
2640 break;
2641 case ETHTOOL_GRINGPARAM:
2642 rc = ethtool_get_ringparam(dev, useraddr);
2643 break;
2644 case ETHTOOL_SRINGPARAM:
2645 rc = ethtool_set_ringparam(dev, useraddr);
2646 break;
2647 case ETHTOOL_GPAUSEPARAM:
2648 rc = ethtool_get_pauseparam(dev, useraddr);
2649 break;
2650 case ETHTOOL_SPAUSEPARAM:
2651 rc = ethtool_set_pauseparam(dev, useraddr);
2652 break;
1da177e4
LT		 2653 case ETHTOOL_TEST:
2654 rc = ethtool_self_test(dev, useraddr);
2655 break;
2656 case ETHTOOL_GSTRINGS:
2657 rc = ethtool_get_strings(dev, useraddr);
2658 break;
2659 case ETHTOOL_PHYS_ID:
2660 rc = ethtool_phys_id(dev, useraddr);
2661 break;
2662 case ETHTOOL_GSTATS:
2663 rc = ethtool_get_stats(dev, useraddr);
2664 break;
a6f9a705
JW		 2665 case ETHTOOL_GPERMADDR:
2666 rc = ethtool_get_perm_addr(dev, useraddr);
2667 break;
3ae7c0b2 2668 case ETHTOOL_GFLAGS:
13c99b24 2669 rc = ethtool_get_value(dev, useraddr, ethcmd,
bc5787c6 2670 __ethtool_get_flags);
3ae7c0b2
JG		 2671 break;
2672 case ETHTOOL_SFLAGS:
da8ac86c 2673 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3ae7c0b2 2674 break;
339bf024 2675 case ETHTOOL_GPFLAGS:
13c99b24
JG		 2676 rc = ethtool_get_value(dev, useraddr, ethcmd,
2677 dev->ethtool_ops->get_priv_flags);
339bf024
JG		 2678 break;
2679 case ETHTOOL_SPFLAGS:
13c99b24
JG		 2680 rc = ethtool_set_value(dev, useraddr,
2681 dev->ethtool_ops->set_priv_flags);
339bf024 2682 break;
0853ad66 2683 case ETHTOOL_GRXFH:
59089d8d
SB		 2684 case ETHTOOL_GRXRINGS:
2685 case ETHTOOL_GRXCLSRLCNT:
2686 case ETHTOOL_GRXCLSRULE:
2687 case ETHTOOL_GRXCLSRLALL:
bf988435 2688 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
0853ad66
SB		 2689 break;
2690 case ETHTOOL_SRXFH:
59089d8d
SB		 2691 case ETHTOOL_SRXCLSRLDEL:
2692 case ETHTOOL_SRXCLSRLINS:
bf988435 2693 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
0853ad66 2694 break;
05c6a8d7
AK		 2695 case ETHTOOL_FLASHDEV:
2696 rc = ethtool_flash_device(dev, useraddr);
2697 break;
d73d3a8c
BH		 2698 case ETHTOOL_RESET:
2699 rc = ethtool_reset(dev, useraddr);
2700 break;
723b2f57
JG		 2701 case ETHTOOL_GSSET_INFO:
2702 rc = ethtool_get_sset_info(dev, useraddr);
2703 break;
a5b6ee29
BH		 2704 case ETHTOOL_GRXFHINDIR:
2705 rc = ethtool_get_rxfh_indir(dev, useraddr);
2706 break;
2707 case ETHTOOL_SRXFHINDIR:
2708 rc = ethtool_set_rxfh_indir(dev, useraddr);
2709 break;
3de0b592
VD		 2710 case ETHTOOL_GRSSH:
2711 rc = ethtool_get_rxfh(dev, useraddr);
2712 break;
2713 case ETHTOOL_SRSSH:
2714 rc = ethtool_set_rxfh(dev, useraddr);
2715 break;
5455c699
MM		 2716 case ETHTOOL_GFEATURES:
2717 rc = ethtool_get_features(dev, useraddr);
2718 break;
2719 case ETHTOOL_SFEATURES:
2720 rc = ethtool_set_features(dev, useraddr);
2721 break;
0a417704 2722 case ETHTOOL_GTXCSUM:
e83d360d 2723 case ETHTOOL_GRXCSUM:
0a417704
MM		 2724 case ETHTOOL_GSG:
2725 case ETHTOOL_GTSO:
2726 case ETHTOOL_GUFO:
2727 case ETHTOOL_GGSO:
2728 case ETHTOOL_GGRO:
2729 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2730 break;
2731 case ETHTOOL_STXCSUM:
e83d360d 2732 case ETHTOOL_SRXCSUM:
0a417704
MM		 2733 case ETHTOOL_SSG:
2734 case ETHTOOL_STSO:
2735 case ETHTOOL_SUFO:
2736 case ETHTOOL_SGSO:
2737 case ETHTOOL_SGRO:
2738 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2739 break;
8b5933c3 2740 case ETHTOOL_GCHANNELS:
2741 rc = ethtool_get_channels(dev, useraddr);
2742 break;
2743 case ETHTOOL_SCHANNELS:
2744 rc = ethtool_set_channels(dev, useraddr);
2745 break;
29dd54b7
AC		 2746 case ETHTOOL_SET_DUMP:
2747 rc = ethtool_set_dump(dev, useraddr);
2748 break;
2749 case ETHTOOL_GET_DUMP_FLAG:
2750 rc = ethtool_get_dump_flag(dev, useraddr);
2751 break;
2752 case ETHTOOL_GET_DUMP_DATA:
2753 rc = ethtool_get_dump_data(dev, useraddr);
2754 break;
c8f3a8c3
RC		 2755 case ETHTOOL_GET_TS_INFO:
2756 rc = ethtool_get_ts_info(dev, useraddr);
2757 break;
41c3cb6d
SH		 2758 case ETHTOOL_GMODULEINFO:
2759 rc = ethtool_get_module_info(dev, useraddr);
2760 break;
2761 case ETHTOOL_GMODULEEEPROM:
2762 rc = ethtool_get_module_eeprom(dev, useraddr);
2763 break;
f0db9b07
GV		 2764 case ETHTOOL_GTUNABLE:
2765 rc = ethtool_get_tunable(dev, useraddr);
2766 break;
2767 case ETHTOOL_STUNABLE:
2768 rc = ethtool_set_tunable(dev, useraddr);
2769 break;
f3a40945
AL		 2770 case ETHTOOL_GPHYSTATS:
2771 rc = ethtool_get_phy_stats(dev, useraddr);
2772 break;
ac2c7ad0
KL		 2773 case ETHTOOL_PERQUEUE:
2774 rc = ethtool_set_per_queue(dev, useraddr);
2775 break;
3f1ac7a7
DD		 2776 case ETHTOOL_GLINKSETTINGS:
2777 rc = ethtool_get_link_ksettings(dev, useraddr);
2778 break;
2779 case ETHTOOL_SLINKSETTINGS:
2780 rc = ethtool_set_link_ksettings(dev, useraddr);
2781 break;
968ad9da
RL		 2782 case ETHTOOL_PHY_GTUNABLE:
2783 rc = get_phy_tunable(dev, useraddr);
2784 break;
2785 case ETHTOOL_PHY_STUNABLE:
2786 rc = set_phy_tunable(dev, useraddr);
2787 break;
1da177e4 2788 default:
61a44b9c 2789 rc = -EOPNOTSUPP;
1da177e4 2790 }
4ec93edb 2791
e71a4783 2792 if (dev->ethtool_ops->complete)
1da177e4 2793 dev->ethtool_ops->complete(dev);
d8a33ac4
SH		 2794
2795 if (old_features != dev->features)
2796 netdev_features_change(dev);
2797
1da177e4 2798 return rc;
1da177e4 2799}
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