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[deliverable/linux.git] / net / core / ethtool.c
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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",
82 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
83 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
68c33163 84 [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
cb32f511 85 [NETIF_F_GSO_IPIP_BIT] = "tx-ipip-segmentation",
61c1db7f 86 [NETIF_F_GSO_SIT_BIT] = "tx-sit-segmentation",
73136267 87 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
9d921549
MM		 88
89 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
53692b1d 90 [NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
9d921549
MM		 91 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
92 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
93 [NETIF_F_RXHASH_BIT] = "rx-hashing",
94 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
95 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
96 [NETIF_F_LOOPBACK_BIT] = "loopback",
36eabda3 97 [NETIF_F_RXFCS_BIT] = "rx-fcs",
5e0c03c8 98 [NETIF_F_RXALL_BIT] = "rx-all",
a6cc0cfa 99 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
d0290214 100 [NETIF_F_BUSY_POLL_BIT] = "busy-poll",
1c78c64e 101 [NETIF_F_HW_TC_BIT] = "hw-tc-offload",
9d921549
MM		 102};
103
892311f6
EP		 104static const char
105rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
106 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
107 [ETH_RSS_HASH_XOR_BIT] = "xor",
108};
109
a4244b0c
HHZ		 110static const char
111tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
112 [ETHTOOL_ID_UNSPEC] = "Unspec",
113 [ETHTOOL_RX_COPYBREAK] = "rx-copybreak",
114 [ETHTOOL_TX_COPYBREAK] = "tx-copybreak",
115};
116
5455c699
MM		 117static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
118{
119 struct ethtool_gfeatures cmd = {
120 .cmd = ETHTOOL_GFEATURES,
121 .size = ETHTOOL_DEV_FEATURE_WORDS,
122 };
475414f6 123 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
5455c699
MM		 124 u32 __user *sizeaddr;
125 u32 copy_size;
475414f6
MM		 126 int i;
127
128 /* in case feature bits run out again */
09da71b1 129 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
475414f6
MM		 130
131 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 132 features[i].available = (u32)(dev->hw_features >> (32 * i));
133 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
134 features[i].active = (u32)(dev->features >> (32 * i));
135 features[i].never_changed =
136 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
475414f6 137 }
5455c699
MM		 138
139 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
140 if (get_user(copy_size, sizeaddr))
141 return -EFAULT;
142
143 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
144 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
145
146 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
147 return -EFAULT;
148 useraddr += sizeof(cmd);
149 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
150 return -EFAULT;
151
152 return 0;
153}
154
155static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
156{
157 struct ethtool_sfeatures cmd;
158 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
475414f6
MM		 159 netdev_features_t wanted = 0, valid = 0;
160 int i, ret = 0;
5455c699
MM		 161
162 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
163 return -EFAULT;
164 useraddr += sizeof(cmd);
165
166 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
167 return -EINVAL;
168
169 if (copy_from_user(features, useraddr, sizeof(features)))
170 return -EFAULT;
171
475414f6 172 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 173 valid |= (netdev_features_t)features[i].valid << (32 * i);
174 wanted |= (netdev_features_t)features[i].requested << (32 * i);
475414f6
MM		 175 }
176
177 if (valid & ~NETIF_F_ETHTOOL_BITS)
5455c699
MM		 178 return -EINVAL;
179
475414f6
MM		 180 if (valid & ~dev->hw_features) {
181 valid &= dev->hw_features;
5455c699
MM		 182 ret |= ETHTOOL_F_UNSUPPORTED;
183 }
184
475414f6
MM		 185 dev->wanted_features &= ~valid;
186 dev->wanted_features |= wanted & valid;
6cb6a27c 187 __netdev_update_features(dev);
5455c699 188
475414f6 189 if ((dev->wanted_features ^ dev->features) & valid)
5455c699
MM		 190 ret |= ETHTOOL_F_WISH;
191
192 return ret;
193}
194
f3a40945
AL		 195static int phy_get_sset_count(struct phy_device *phydev)
196{
197 int ret;
198
199 if (phydev->drv->get_sset_count &&
200 phydev->drv->get_strings &&
201 phydev->drv->get_stats) {
202 mutex_lock(&phydev->lock);
203 ret = phydev->drv->get_sset_count(phydev);
204 mutex_unlock(&phydev->lock);
205
206 return ret;
207 }
208
209 return -EOPNOTSUPP;
210}
211
340ae165
MM		 212static int __ethtool_get_sset_count(struct net_device *dev, int sset)
213{
214 const struct ethtool_ops *ops = dev->ethtool_ops;
215
5455c699
MM		 216 if (sset == ETH_SS_FEATURES)
217 return ARRAY_SIZE(netdev_features_strings);
218
892311f6
EP		 219 if (sset == ETH_SS_RSS_HASH_FUNCS)
220 return ARRAY_SIZE(rss_hash_func_strings);
221
a4244b0c
HHZ		 222 if (sset == ETH_SS_TUNABLES)
223 return ARRAY_SIZE(tunable_strings);
224
f3a40945
AL		 225 if (sset == ETH_SS_PHY_STATS) {
226 if (dev->phydev)
227 return phy_get_sset_count(dev->phydev);
228 else
229 return -EOPNOTSUPP;
230 }
231
c03a14e8 232 if (ops->get_sset_count && ops->get_strings)
340ae165
MM		 233 return ops->get_sset_count(dev, sset);
234 else
235 return -EOPNOTSUPP;
236}
237
238static void __ethtool_get_strings(struct net_device *dev,
239 u32 stringset, u8 *data)
240{
241 const struct ethtool_ops *ops = dev->ethtool_ops;
242
5455c699
MM		 243 if (stringset == ETH_SS_FEATURES)
244 memcpy(data, netdev_features_strings,
245 sizeof(netdev_features_strings));
892311f6
EP		 246 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
247 memcpy(data, rss_hash_func_strings,
248 sizeof(rss_hash_func_strings));
a4244b0c
HHZ		 249 else if (stringset == ETH_SS_TUNABLES)
250 memcpy(data, tunable_strings, sizeof(tunable_strings));
f3a40945
AL		 251 else if (stringset == ETH_SS_PHY_STATS) {
252 struct phy_device *phydev = dev->phydev;
253
254 if (phydev) {
255 mutex_lock(&phydev->lock);
256 phydev->drv->get_strings(phydev, data);
257 mutex_unlock(&phydev->lock);
258 } else {
259 return;
260 }
261 } else
5455c699
MM		 262 /* ops->get_strings is valid because checked earlier */
263 ops->get_strings(dev, stringset, data);
340ae165
MM		 264}
265
c8f44aff 266static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
0a417704
MM		 267{
268 /* feature masks of legacy discrete ethtool ops */
269
270 switch (eth_cmd) {
271 case ETHTOOL_GTXCSUM:
272 case ETHTOOL_STXCSUM:
a188222b 273 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
e83d360d
MM		 274 case ETHTOOL_GRXCSUM:
275 case ETHTOOL_SRXCSUM:
276 return NETIF_F_RXCSUM;
0a417704
MM		 277 case ETHTOOL_GSG:
278 case ETHTOOL_SSG:
279 return NETIF_F_SG;
280 case ETHTOOL_GTSO:
281 case ETHTOOL_STSO:
282 return NETIF_F_ALL_TSO;
283 case ETHTOOL_GUFO:
284 case ETHTOOL_SUFO:
285 return NETIF_F_UFO;
286 case ETHTOOL_GGSO:
287 case ETHTOOL_SGSO:
288 return NETIF_F_GSO;
289 case ETHTOOL_GGRO:
290 case ETHTOOL_SGRO:
291 return NETIF_F_GRO;
292 default:
293 BUG();
294 }
295}
296
0a417704
MM		 297static int ethtool_get_one_feature(struct net_device *dev,
298 char __user *useraddr, u32 ethcmd)
299{
c8f44aff 300 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
0a417704
MM		 301 struct ethtool_value edata = {
302 .cmd = ethcmd,
86794881 303 .data = !!(dev->features & mask),
0a417704 304 };
0a417704 305
0a417704
MM		 306 if (copy_to_user(useraddr, &edata, sizeof(edata)))
307 return -EFAULT;
308 return 0;
309}
310
0a417704
MM		 311static int ethtool_set_one_feature(struct net_device *dev,
312 void __user *useraddr, u32 ethcmd)
313{
314 struct ethtool_value edata;
c8f44aff 315 netdev_features_t mask;
0a417704
MM		 316
317 if (copy_from_user(&edata, useraddr, sizeof(edata)))
318 return -EFAULT;
319
86794881
MM		 320 mask = ethtool_get_feature_mask(ethcmd);
321 mask &= dev->hw_features;
bc5787c6
MM		 322 if (!mask)
323 return -EOPNOTSUPP;
86794881 324
bc5787c6
MM		 325 if (edata.data)
326 dev->wanted_features |= mask;
327 else
328 dev->wanted_features &= ~mask;
86794881 329
bc5787c6 330 __netdev_update_features(dev);
86794881 331
bc5787c6
MM		 332 return 0;
333}
334
02b3a552
MM		 335#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
336 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
f646968f
PM		 337#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
338 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
339 NETIF_F_RXHASH)
bc5787c6
MM		 340
341static u32 __ethtool_get_flags(struct net_device *dev)
342{
02b3a552
MM		 343 u32 flags = 0;
344
8a73125c
DF		 345 if (dev->features & NETIF_F_LRO)
346 flags |= ETH_FLAG_LRO;
347 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
348 flags |= ETH_FLAG_RXVLAN;
349 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
350 flags |= ETH_FLAG_TXVLAN;
351 if (dev->features & NETIF_F_NTUPLE)
352 flags |= ETH_FLAG_NTUPLE;
353 if (dev->features & NETIF_F_RXHASH)
354 flags |= ETH_FLAG_RXHASH;
02b3a552
MM		 355
356 return flags;
0a417704
MM		 357}
358
bc5787c6 359static int __ethtool_set_flags(struct net_device *dev, u32 data)
da8ac86c 360{
c8f44aff 361 netdev_features_t features = 0, changed;
da8ac86c 362
02b3a552 363 if (data & ~ETH_ALL_FLAGS)
da8ac86c
MM		 364 return -EINVAL;
365
8a73125c
DF		 366 if (data & ETH_FLAG_LRO)
367 features |= NETIF_F_LRO;
368 if (data & ETH_FLAG_RXVLAN)
369 features |= NETIF_F_HW_VLAN_CTAG_RX;
370 if (data & ETH_FLAG_TXVLAN)
371 features |= NETIF_F_HW_VLAN_CTAG_TX;
372 if (data & ETH_FLAG_NTUPLE)
373 features |= NETIF_F_NTUPLE;
374 if (data & ETH_FLAG_RXHASH)
375 features |= NETIF_F_RXHASH;
02b3a552 376
da8ac86c 377 /* allow changing only bits set in hw_features */
02b3a552 378 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
da8ac86c
MM		 379 if (changed & ~dev->hw_features)
380 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
381
382 dev->wanted_features =
02b3a552 383 (dev->wanted_features & ~changed) | (features & changed);
da8ac86c 384
6cb6a27c 385 __netdev_update_features(dev);
da8ac86c
MM		 386
387 return 0;
388}
389
3f1ac7a7
DD		 390static void convert_legacy_u32_to_link_mode(unsigned long *dst, u32 legacy_u32)
391{
392 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
393 dst[0] = legacy_u32;
394}
395
396/* return false if src had higher bits set. lower bits always updated. */
397static bool convert_link_mode_to_legacy_u32(u32 *legacy_u32,
398 const unsigned long *src)
399{
400 bool retval = true;
401
402 /* TODO: following test will soon always be true */
403 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
404 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
405
406 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
407 bitmap_fill(ext, 32);
408 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
409 if (bitmap_intersects(ext, src,
410 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
411 /* src mask goes beyond bit 31 */
412 retval = false;
413 }
414 }
415 *legacy_u32 = src[0];
416 return retval;
417}
418
419/* return false if legacy contained non-0 deprecated fields
420 * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
421 */
422static bool
423convert_legacy_settings_to_link_ksettings(
424 struct ethtool_link_ksettings *link_ksettings,
425 const struct ethtool_cmd *legacy_settings)
426{
427 bool retval = true;
428
429 memset(link_ksettings, 0, sizeof(*link_ksettings));
430
431 /* This is used to tell users that driver is still using these
432 * deprecated legacy fields, and they should not use
433 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
434 */
435 if (legacy_settings->transceiver ||
436 legacy_settings->maxtxpkt ||
437 legacy_settings->maxrxpkt)
438 retval = false;
439
440 convert_legacy_u32_to_link_mode(
441 link_ksettings->link_modes.supported,
442 legacy_settings->supported);
443 convert_legacy_u32_to_link_mode(
444 link_ksettings->link_modes.advertising,
445 legacy_settings->advertising);
446 convert_legacy_u32_to_link_mode(
447 link_ksettings->link_modes.lp_advertising,
448 legacy_settings->lp_advertising);
449 link_ksettings->base.speed
450 = ethtool_cmd_speed(legacy_settings);
451 link_ksettings->base.duplex
452 = legacy_settings->duplex;
453 link_ksettings->base.port
454 = legacy_settings->port;
455 link_ksettings->base.phy_address
456 = legacy_settings->phy_address;
457 link_ksettings->base.autoneg
458 = legacy_settings->autoneg;
459 link_ksettings->base.mdio_support
460 = legacy_settings->mdio_support;
461 link_ksettings->base.eth_tp_mdix
462 = legacy_settings->eth_tp_mdix;
463 link_ksettings->base.eth_tp_mdix_ctrl
464 = legacy_settings->eth_tp_mdix_ctrl;
465 return retval;
466}
467
468/* return false if ksettings link modes had higher bits
469 * set. legacy_settings always updated (best effort)
470 */
471static bool
472convert_link_ksettings_to_legacy_settings(
473 struct ethtool_cmd *legacy_settings,
474 const struct ethtool_link_ksettings *link_ksettings)
475{
476 bool retval = true;
477
478 memset(legacy_settings, 0, sizeof(*legacy_settings));
479 /* this also clears the deprecated fields in legacy structure:
480 * __u8 transceiver;
481 * __u32 maxtxpkt;
482 * __u32 maxrxpkt;
483 */
484
485 retval &= convert_link_mode_to_legacy_u32(
486 &legacy_settings->supported,
487 link_ksettings->link_modes.supported);
488 retval &= convert_link_mode_to_legacy_u32(
489 &legacy_settings->advertising,
490 link_ksettings->link_modes.advertising);
491 retval &= convert_link_mode_to_legacy_u32(
492 &legacy_settings->lp_advertising,
493 link_ksettings->link_modes.lp_advertising);
494 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
495 legacy_settings->duplex
496 = link_ksettings->base.duplex;
497 legacy_settings->port
498 = link_ksettings->base.port;
499 legacy_settings->phy_address
500 = link_ksettings->base.phy_address;
501 legacy_settings->autoneg
502 = link_ksettings->base.autoneg;
503 legacy_settings->mdio_support
504 = link_ksettings->base.mdio_support;
505 legacy_settings->eth_tp_mdix
506 = link_ksettings->base.eth_tp_mdix;
507 legacy_settings->eth_tp_mdix_ctrl
508 = link_ksettings->base.eth_tp_mdix_ctrl;
509 return retval;
510}
511
512/* number of 32-bit words to store the user's link mode bitmaps */
513#define __ETHTOOL_LINK_MODE_MASK_NU32 \
514 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
515
516/* layout of the struct passed from/to userland */
517struct ethtool_link_usettings {
518 struct ethtool_link_settings base;
519 struct {
520 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
521 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
522 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
523 } link_modes;
524};
525
526/* Internal kernel helper to query a device ethtool_link_settings.
527 *
528 * Backward compatibility note: for compatibility with legacy drivers
529 * that implement only the ethtool_cmd API, this has to work with both
530 * drivers implementing get_link_ksettings API and drivers
531 * implementing get_settings API. When drivers implement get_settings
532 * and report ethtool_cmd deprecated fields
533 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
534 * because the resulting struct ethtool_link_settings does not report them.
535 */
536int __ethtool_get_link_ksettings(struct net_device *dev,
537 struct ethtool_link_ksettings *link_ksettings)
538{
539 int err;
540 struct ethtool_cmd cmd;
541
542 ASSERT_RTNL();
543
544 if (dev->ethtool_ops->get_link_ksettings) {
545 memset(link_ksettings, 0, sizeof(*link_ksettings));
546 return dev->ethtool_ops->get_link_ksettings(dev,
547 link_ksettings);
548 }
549
550 /* driver doesn't support %ethtool_link_ksettings API. revert to
551 * legacy %ethtool_cmd API, unless it's not supported either.
552 * TODO: remove when ethtool_ops::get_settings disappears internally
553 */
3237fc63
DD		 554 if (!dev->ethtool_ops->get_settings)
555 return -EOPNOTSUPP;
556
557 memset(&cmd, 0, sizeof(cmd));
558 cmd.cmd = ETHTOOL_GSET;
559 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 560 if (err < 0)
561 return err;
562
563 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
564 */
565 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
566 return err;
567}
568EXPORT_SYMBOL(__ethtool_get_link_ksettings);
569
570/* convert ethtool_link_usettings in user space to a kernel internal
571 * ethtool_link_ksettings. return 0 on success, errno on error.
572 */
573static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
574 const void __user *from)
575{
576 struct ethtool_link_usettings link_usettings;
577
578 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
579 return -EFAULT;
580
581 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
582 bitmap_from_u32array(to->link_modes.supported,
583 __ETHTOOL_LINK_MODE_MASK_NBITS,
584 link_usettings.link_modes.supported,
585 __ETHTOOL_LINK_MODE_MASK_NU32);
586 bitmap_from_u32array(to->link_modes.advertising,
587 __ETHTOOL_LINK_MODE_MASK_NBITS,
588 link_usettings.link_modes.advertising,
589 __ETHTOOL_LINK_MODE_MASK_NU32);
590 bitmap_from_u32array(to->link_modes.lp_advertising,
591 __ETHTOOL_LINK_MODE_MASK_NBITS,
592 link_usettings.link_modes.lp_advertising,
593 __ETHTOOL_LINK_MODE_MASK_NU32);
594
595 return 0;
596}
597
598/* convert a kernel internal ethtool_link_ksettings to
599 * ethtool_link_usettings in user space. return 0 on success, errno on
600 * error.
601 */
602static int
603store_link_ksettings_for_user(void __user *to,
604 const struct ethtool_link_ksettings *from)
605{
606 struct ethtool_link_usettings link_usettings;
607
608 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
609 bitmap_to_u32array(link_usettings.link_modes.supported,
610 __ETHTOOL_LINK_MODE_MASK_NU32,
611 from->link_modes.supported,
612 __ETHTOOL_LINK_MODE_MASK_NBITS);
613 bitmap_to_u32array(link_usettings.link_modes.advertising,
614 __ETHTOOL_LINK_MODE_MASK_NU32,
615 from->link_modes.advertising,
616 __ETHTOOL_LINK_MODE_MASK_NBITS);
617 bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
618 __ETHTOOL_LINK_MODE_MASK_NU32,
619 from->link_modes.lp_advertising,
620 __ETHTOOL_LINK_MODE_MASK_NBITS);
621
622 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
623 return -EFAULT;
624
625 return 0;
626}
627
628/* Query device for its ethtool_link_settings.
629 *
630 * Backward compatibility note: this function must fail when driver
631 * does not implement ethtool::get_link_ksettings, even if legacy
632 * ethtool_ops::get_settings is implemented. This tells new versions
633 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
634 * this driver, so that they can correctly access the ethtool_cmd
635 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
636 * implements ethtool_ops::get_settings anymore.
637 */
638static int ethtool_get_link_ksettings(struct net_device *dev,
639 void __user *useraddr)
640{
641 int err = 0;
642 struct ethtool_link_ksettings link_ksettings;
643
644 ASSERT_RTNL();
645
646 if (!dev->ethtool_ops->get_link_ksettings)
647 return -EOPNOTSUPP;
648
649 /* handle bitmap nbits handshake */
650 if (copy_from_user(&link_ksettings.base, useraddr,
651 sizeof(link_ksettings.base)))
652 return -EFAULT;
653
654 if (__ETHTOOL_LINK_MODE_MASK_NU32
655 != link_ksettings.base.link_mode_masks_nwords) {
656 /* wrong link mode nbits requested */
657 memset(&link_ksettings, 0, sizeof(link_ksettings));
793cf87d 658 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
3f1ac7a7
DD		 659 /* send back number of words required as negative val */
660 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
661 "need too many bits for link modes!");
662 link_ksettings.base.link_mode_masks_nwords
663 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
664
665 /* copy the base fields back to user, not the link
666 * mode bitmaps
667 */
668 if (copy_to_user(useraddr, &link_ksettings.base,
669 sizeof(link_ksettings.base)))
670 return -EFAULT;
671
672 return 0;
673 }
674
675 /* handshake successful: user/kernel agree on
676 * link_mode_masks_nwords
677 */
678
679 memset(&link_ksettings, 0, sizeof(link_ksettings));
680 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
681 if (err < 0)
682 return err;
683
684 /* make sure we tell the right values to user */
685 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
686 link_ksettings.base.link_mode_masks_nwords
687 = __ETHTOOL_LINK_MODE_MASK_NU32;
688
689 return store_link_ksettings_for_user(useraddr, &link_ksettings);
690}
691
692/* Update device ethtool_link_settings.
693 *
694 * Backward compatibility note: this function must fail when driver
695 * does not implement ethtool::set_link_ksettings, even if legacy
696 * ethtool_ops::set_settings is implemented. This tells new versions
697 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
698 * this driver, so that they can correctly update the ethtool_cmd
699 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
700 * implements ethtool_ops::get_settings anymore.
701 */
702static int ethtool_set_link_ksettings(struct net_device *dev,
703 void __user *useraddr)
704{
705 int err;
706 struct ethtool_link_ksettings link_ksettings;
707
708 ASSERT_RTNL();
709
710 if (!dev->ethtool_ops->set_link_ksettings)
711 return -EOPNOTSUPP;
712
713 /* make sure nbits field has expected value */
714 if (copy_from_user(&link_ksettings.base, useraddr,
715 sizeof(link_ksettings.base)))
716 return -EFAULT;
717
718 if (__ETHTOOL_LINK_MODE_MASK_NU32
719 != link_ksettings.base.link_mode_masks_nwords)
720 return -EINVAL;
721
722 /* copy the whole structure, now that we know it has expected
723 * format
724 */
725 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
726 if (err)
727 return err;
728
729 /* re-check nwords field, just in case */
730 if (__ETHTOOL_LINK_MODE_MASK_NU32
731 != link_ksettings.base.link_mode_masks_nwords)
732 return -EINVAL;
733
734 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
735}
736
3f1ac7a7
DD		 737static void
738warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
739{
740 char name[sizeof(current->comm)];
741
742 pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
743 get_task_comm(name, current), details);
744}
745
746/* Query device for its ethtool_cmd settings.
747 *
748 * Backward compatibility note: for compatibility with legacy ethtool,
749 * this has to work with both drivers implementing get_link_ksettings
750 * API and drivers implementing get_settings API. When drivers
751 * implement get_link_ksettings and report higher link mode bits, a
752 * kernel warning is logged once (with name of 1st driver/device) to
753 * recommend user to upgrade ethtool, but the command is successful
754 * (only the lower link mode bits reported back to user).
755 */
4bc71cb9
JP		 756static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
757{
4bc71cb9
JP		 758 struct ethtool_cmd cmd;
759
3f1ac7a7
DD		 760 ASSERT_RTNL();
761
762 if (dev->ethtool_ops->get_link_ksettings) {
763 /* First, use link_ksettings API if it is supported */
764 int err;
765 struct ethtool_link_ksettings link_ksettings;
766
767 memset(&link_ksettings, 0, sizeof(link_ksettings));
768 err = dev->ethtool_ops->get_link_ksettings(dev,
769 &link_ksettings);
770 if (err < 0)
771 return err;
772 if (!convert_link_ksettings_to_legacy_settings(&cmd,
773 &link_ksettings))
774 warn_incomplete_ethtool_legacy_settings_conversion(
775 "link modes are only partially reported");
776
777 /* send a sensible cmd tag back to user */
778 cmd.cmd = ETHTOOL_GSET;
779 } else {
3f1ac7a7
DD		 780 /* driver doesn't support %ethtool_link_ksettings
781 * API. revert to legacy %ethtool_cmd API, unless it's
782 * not supported either.
783 */
3237fc63
DD		 784 int err;
785
786 if (!dev->ethtool_ops->get_settings)
787 return -EOPNOTSUPP;
788
789 memset(&cmd, 0, sizeof(cmd));
790 cmd.cmd = ETHTOOL_GSET;
791 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 792 if (err < 0)
793 return err;
794 }
1da177e4
LT		 795
796 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
797 return -EFAULT;
3f1ac7a7 798
1da177e4
LT		 799 return 0;
800}
801
3f1ac7a7
DD		 802/* Update device link settings with given ethtool_cmd.
803 *
804 * Backward compatibility note: for compatibility with legacy ethtool,
805 * this has to work with both drivers implementing set_link_ksettings
806 * API and drivers implementing set_settings API. When drivers
807 * implement set_link_ksettings and user's request updates deprecated
808 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
809 * warning is logged once (with name of 1st driver/device) to
810 * recommend user to upgrade ethtool, and the request is rejected.
811 */
1da177e4
LT		 812static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
813{
814 struct ethtool_cmd cmd;
815
3f1ac7a7 816 ASSERT_RTNL();
1da177e4
LT		 817
818 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
819 return -EFAULT;
820
3f1ac7a7
DD		 821 /* first, try new %ethtool_link_ksettings API. */
822 if (dev->ethtool_ops->set_link_ksettings) {
823 struct ethtool_link_ksettings link_ksettings;
824
825 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
826 &cmd))
827 return -EINVAL;
828
829 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
830 link_ksettings.base.link_mode_masks_nwords
831 = __ETHTOOL_LINK_MODE_MASK_NU32;
832 return dev->ethtool_ops->set_link_ksettings(dev,
833 &link_ksettings);
834 }
835
836 /* legacy %ethtool_cmd API */
837
838 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
839 * disappears internally
840 */
841
842 if (!dev->ethtool_ops->set_settings)
843 return -EOPNOTSUPP;
844
1da177e4
LT		 845 return dev->ethtool_ops->set_settings(dev, &cmd);
846}
847
97f8aefb 848static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
849 void __user *useraddr)
1da177e4
LT		 850{
851 struct ethtool_drvinfo info;
76fd8593 852 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 853
1da177e4
LT		 854 memset(&info, 0, sizeof(info));
855 info.cmd = ETHTOOL_GDRVINFO;
c03a14e8 856 if (ops->get_drvinfo) {
01414802
BH		 857 ops->get_drvinfo(dev, &info);
858 } else if (dev->dev.parent && dev->dev.parent->driver) {
859 strlcpy(info.bus_info, dev_name(dev->dev.parent),
860 sizeof(info.bus_info));
861 strlcpy(info.driver, dev->dev.parent->driver->name,
862 sizeof(info.driver));
863 } else {
864 return -EOPNOTSUPP;
865 }
1da177e4 866
723b2f57
JG		 867 /*
868 * this method of obtaining string set info is deprecated;
d17792eb 869 * Use ETHTOOL_GSSET_INFO instead.
723b2f57 870 */
c03a14e8 871 if (ops->get_sset_count) {
ff03d49f
JG		 872 int rc;
873
874 rc = ops->get_sset_count(dev, ETH_SS_TEST);
875 if (rc >= 0)
876 info.testinfo_len = rc;
877 rc = ops->get_sset_count(dev, ETH_SS_STATS);
878 if (rc >= 0)
879 info.n_stats = rc;
339bf024
JG		 880 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
881 if (rc >= 0)
882 info.n_priv_flags = rc;
ff03d49f 883 }
c03a14e8 884 if (ops->get_regs_len)
1da177e4 885 info.regdump_len = ops->get_regs_len(dev);
c03a14e8 886 if (ops->get_eeprom_len)
1da177e4
LT		 887 info.eedump_len = ops->get_eeprom_len(dev);
888
889 if (copy_to_user(useraddr, &info, sizeof(info)))
890 return -EFAULT;
891 return 0;
892}
893
f5c445ed 894static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
97f8aefb 895 void __user *useraddr)
723b2f57
JG		 896{
897 struct ethtool_sset_info info;
723b2f57
JG		 898 u64 sset_mask;
899 int i, idx = 0, n_bits = 0, ret, rc;
900 u32 *info_buf = NULL;
901
723b2f57
JG		 902 if (copy_from_user(&info, useraddr, sizeof(info)))
903 return -EFAULT;
904
905 /* store copy of mask, because we zero struct later on */
906 sset_mask = info.sset_mask;
907 if (!sset_mask)
908 return 0;
909
910 /* calculate size of return buffer */
d17792eb 911 n_bits = hweight64(sset_mask);
723b2f57
JG		 912
913 memset(&info, 0, sizeof(info));
914 info.cmd = ETHTOOL_GSSET_INFO;
915
916 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
917 if (!info_buf)
918 return -ENOMEM;
919
920 /*
921 * fill return buffer based on input bitmask and successful
922 * get_sset_count return
923 */
924 for (i = 0; i < 64; i++) {
925 if (!(sset_mask & (1ULL << i)))
926 continue;
927
340ae165 928 rc = __ethtool_get_sset_count(dev, i);
723b2f57
JG		 929 if (rc >= 0) {
930 info.sset_mask |= (1ULL << i);
931 info_buf[idx++] = rc;
932 }
933 }
934
935 ret = -EFAULT;
936 if (copy_to_user(useraddr, &info, sizeof(info)))
937 goto out;
938
939 useraddr += offsetof(struct ethtool_sset_info, data);
940 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
941 goto out;
942
943 ret = 0;
944
945out:
946 kfree(info_buf);
947 return ret;
948}
949
97f8aefb 950static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
bf988435 951 u32 cmd, void __user *useraddr)
0853ad66 952{
bf988435
BH		 953 struct ethtool_rxnfc info;
954 size_t info_size = sizeof(info);
55664f32 955 int rc;
0853ad66 956
59089d8d 957 if (!dev->ethtool_ops->set_rxnfc)
0853ad66
SB		 958 return -EOPNOTSUPP;
959
bf988435
BH		 960 /* struct ethtool_rxnfc was originally defined for
961 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
962 * members. User-space might still be using that
963 * definition. */
964 if (cmd == ETHTOOL_SRXFH)
965 info_size = (offsetof(struct ethtool_rxnfc, data) +
966 sizeof(info.data));
967
968 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 969 return -EFAULT;
970
55664f32
BH		 971 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
972 if (rc)
973 return rc;
974
975 if (cmd == ETHTOOL_SRXCLSRLINS &&
976 copy_to_user(useraddr, &info, info_size))
977 return -EFAULT;
978
979 return 0;
0853ad66
SB		 980}
981
97f8aefb 982static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
bf988435 983 u32 cmd, void __user *useraddr)
0853ad66
SB		 984{
985 struct ethtool_rxnfc info;
bf988435 986 size_t info_size = sizeof(info);
59089d8d
SB		 987 const struct ethtool_ops *ops = dev->ethtool_ops;
988 int ret;
989 void *rule_buf = NULL;
0853ad66 990
59089d8d 991 if (!ops->get_rxnfc)
0853ad66
SB		 992 return -EOPNOTSUPP;
993
bf988435
BH		 994 /* struct ethtool_rxnfc was originally defined for
995 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
996 * members. User-space might still be using that
997 * definition. */
998 if (cmd == ETHTOOL_GRXFH)
999 info_size = (offsetof(struct ethtool_rxnfc, data) +
1000 sizeof(info.data));
1001
1002 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 1003 return -EFAULT;
1004
59089d8d
SB		 1005 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1006 if (info.rule_cnt > 0) {
db048b69 1007 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
ae6df5f9 1008 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
db048b69 1009 GFP_USER);
59089d8d
SB		 1010 if (!rule_buf)
1011 return -ENOMEM;
1012 }
1013 }
0853ad66 1014
59089d8d
SB		 1015 ret = ops->get_rxnfc(dev, &info, rule_buf);
1016 if (ret < 0)
1017 goto err_out;
1018
1019 ret = -EFAULT;
bf988435 1020 if (copy_to_user(useraddr, &info, info_size))
59089d8d
SB		 1021 goto err_out;
1022
1023 if (rule_buf) {
1024 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1025 if (copy_to_user(useraddr, rule_buf,
1026 info.rule_cnt * sizeof(u32)))
1027 goto err_out;
1028 }
1029 ret = 0;
1030
1031err_out:
c9caceca 1032 kfree(rule_buf);
59089d8d
SB		 1033
1034 return ret;
0853ad66
SB		 1035}
1036
3de0b592
VD		 1037static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1038 struct ethtool_rxnfc *rx_rings,
1039 u32 size)
1040{
fb95cd8d 1041 int i;
3de0b592
VD		 1042
1043 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
fb95cd8d 1044 return -EFAULT;
3de0b592
VD		 1045
1046 /* Validate ring indices */
fb95cd8d
BH		 1047 for (i = 0; i < size; i++)
1048 if (indir[i] >= rx_rings->data)
1049 return -EINVAL;
1050
1051 return 0;
3de0b592
VD		 1052}
1053
ba905f5e 1054u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
960fb622
ED		 1055
1056void netdev_rss_key_fill(void *buffer, size_t len)
1057{
1058 BUG_ON(len > sizeof(netdev_rss_key));
1059 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1060 memcpy(buffer, netdev_rss_key, len);
1061}
1062EXPORT_SYMBOL(netdev_rss_key_fill);
1063
d4ab4286
KJ		 1064static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1065{
1066 u32 dev_size, current_max = 0;
1067 u32 *indir;
1068 int ret;
1069
1070 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1071 !dev->ethtool_ops->get_rxfh)
1072 return -EOPNOTSUPP;
1073 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1074 if (dev_size == 0)
1075 return -EOPNOTSUPP;
1076
1077 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1078 if (!indir)
1079 return -ENOMEM;
1080
1081 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1082 if (ret)
1083 goto out;
1084
1085 while (dev_size--)
1086 current_max = max(current_max, indir[dev_size]);
1087
1088 *max = current_max;
1089
1090out:
1091 kfree(indir);
1092 return ret;
1093}
1094
a5b6ee29
BH		 1095static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1096 void __user *useraddr)
1097{
7850f63f
BH		 1098 u32 user_size, dev_size;
1099 u32 *indir;
a5b6ee29
BH		 1100 int ret;
1101
7850f63f 1102 if (!dev->ethtool_ops->get_rxfh_indir_size ||
fe62d001 1103 !dev->ethtool_ops->get_rxfh)
7850f63f
BH		 1104 return -EOPNOTSUPP;
1105 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1106 if (dev_size == 0)
a5b6ee29
BH		 1107 return -EOPNOTSUPP;
1108
7850f63f 1109 if (copy_from_user(&user_size,
a5b6ee29 1110 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1111 sizeof(user_size)))
a5b6ee29
BH		 1112 return -EFAULT;
1113
7850f63f
BH		 1114 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1115 &dev_size, sizeof(dev_size)))
1116 return -EFAULT;
1117
1118 /* If the user buffer size is 0, this is just a query for the
1119 * device table size. Otherwise, if it's smaller than the
1120 * device table size it's an error.
1121 */
1122 if (user_size < dev_size)
1123 return user_size == 0 ? 0 : -EINVAL;
1124
1125 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1126 if (!indir)
1127 return -ENOMEM;
1128
892311f6 1129 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
a5b6ee29
BH		 1130 if (ret)
1131 goto out;
1132
7850f63f
BH		 1133 if (copy_to_user(useraddr +
1134 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1135 indir, dev_size * sizeof(indir[0])))
a5b6ee29
BH		 1136 ret = -EFAULT;
1137
1138out:
1139 kfree(indir);
1140 return ret;
1141}
1142
1143static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1144 void __user *useraddr)
1145{
7850f63f
BH		 1146 struct ethtool_rxnfc rx_rings;
1147 u32 user_size, dev_size, i;
1148 u32 *indir;
c03a14e8 1149 const struct ethtool_ops *ops = dev->ethtool_ops;
a5b6ee29 1150 int ret;
3de0b592 1151 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
a5b6ee29 1152
fe62d001 1153 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
c03a14e8 1154 !ops->get_rxnfc)
7850f63f 1155 return -EOPNOTSUPP;
c03a14e8
JP		 1156
1157 dev_size = ops->get_rxfh_indir_size(dev);
7850f63f 1158 if (dev_size == 0)
a5b6ee29
BH		 1159 return -EOPNOTSUPP;
1160
7850f63f 1161 if (copy_from_user(&user_size,
a5b6ee29 1162 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1163 sizeof(user_size)))
a5b6ee29
BH		 1164 return -EFAULT;
1165
278bc429 1166 if (user_size != 0 && user_size != dev_size)
7850f63f
BH		 1167 return -EINVAL;
1168
1169 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1170 if (!indir)
1171 return -ENOMEM;
1172
7850f63f 1173 rx_rings.cmd = ETHTOOL_GRXRINGS;
c03a14e8 1174 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
7850f63f
BH		 1175 if (ret)
1176 goto out;
278bc429
BH		 1177
1178 if (user_size == 0) {
1179 for (i = 0; i < dev_size; i++)
1180 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1181 } else {
3de0b592
VD		 1182 ret = ethtool_copy_validate_indir(indir,
1183 useraddr + ringidx_offset,
1184 &rx_rings,
1185 dev_size);
1186 if (ret)
1187 goto out;
1188 }
1189
892311f6 1190 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
d4ab4286
KJ		 1191 if (ret)
1192 goto out;
1193
1194 /* indicate whether rxfh was set to default */
1195 if (user_size == 0)
1196 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1197 else
1198 dev->priv_flags |= IFF_RXFH_CONFIGURED;
3de0b592
VD		 1199
1200out:
1201 kfree(indir);
1202 return ret;
1203}
1204
1205static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1206 void __user *useraddr)
1207{
1208 int ret;
1209 const struct ethtool_ops *ops = dev->ethtool_ops;
f062a384 1210 u32 user_indir_size, user_key_size;
3de0b592 1211 u32 dev_indir_size = 0, dev_key_size = 0;
f062a384 1212 struct ethtool_rxfh rxfh;
3de0b592 1213 u32 total_size;
f062a384 1214 u32 indir_bytes;
3de0b592 1215 u32 *indir = NULL;
892311f6 1216 u8 dev_hfunc = 0;
3de0b592
VD		 1217 u8 *hkey = NULL;
1218 u8 *rss_config;
1219
892311f6 1220 if (!ops->get_rxfh)
3de0b592
VD		 1221 return -EOPNOTSUPP;
1222
1223 if (ops->get_rxfh_indir_size)
1224 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592
VD		 1225 if (ops->get_rxfh_key_size)
1226 dev_key_size = ops->get_rxfh_key_size(dev);
1227
f062a384 1228 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592 1229 return -EFAULT;
f062a384
BH		 1230 user_indir_size = rxfh.indir_size;
1231 user_key_size = rxfh.key_size;
3de0b592 1232
f062a384 1233 /* Check that reserved fields are 0 for now */
892311f6
EP		 1234 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1235 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1236 return -EINVAL;
1237
1238 rxfh.indir_size = dev_indir_size;
1239 rxfh.key_size = dev_key_size;
1240 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
3de0b592
VD		 1241 return -EFAULT;
1242
3de0b592
VD		 1243 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1244 (user_key_size && (user_key_size != dev_key_size)))
1245 return -EINVAL;
1246
1247 indir_bytes = user_indir_size * sizeof(indir[0]);
1248 total_size = indir_bytes + user_key_size;
1249 rss_config = kzalloc(total_size, GFP_USER);
1250 if (!rss_config)
1251 return -ENOMEM;
1252
1253 if (user_indir_size)
1254 indir = (u32 *)rss_config;
1255
1256 if (user_key_size)
1257 hkey = rss_config + indir_bytes;
1258
892311f6
EP		 1259 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1260 if (ret)
1261 goto out;
3de0b592 1262
892311f6
EP		 1263 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1264 &dev_hfunc, sizeof(rxfh.hfunc))) {
1265 ret = -EFAULT;
1266 } else if (copy_to_user(useraddr +
1267 offsetof(struct ethtool_rxfh, rss_config[0]),
1268 rss_config, total_size)) {
1269 ret = -EFAULT;
1270 }
1271out:
3de0b592
VD		 1272 kfree(rss_config);
1273
1274 return ret;
1275}
1276
1277static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1278 void __user *useraddr)
1279{
1280 int ret;
1281 const struct ethtool_ops *ops = dev->ethtool_ops;
1282 struct ethtool_rxnfc rx_rings;
f062a384
BH		 1283 struct ethtool_rxfh rxfh;
1284 u32 dev_indir_size = 0, dev_key_size = 0, i;
3de0b592
VD		 1285 u32 *indir = NULL, indir_bytes = 0;
1286 u8 *hkey = NULL;
1287 u8 *rss_config;
3de0b592
VD		 1288 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1289
892311f6 1290 if (!ops->get_rxnfc || !ops->set_rxfh)
3de0b592
VD		 1291 return -EOPNOTSUPP;
1292
1293 if (ops->get_rxfh_indir_size)
1294 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592 1295 if (ops->get_rxfh_key_size)
d340c862 1296 dev_key_size = ops->get_rxfh_key_size(dev);
3de0b592 1297
f062a384 1298 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592
VD		 1299 return -EFAULT;
1300
f062a384 1301 /* Check that reserved fields are 0 for now */
892311f6
EP		 1302 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1303 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1304 return -EINVAL;
1305
892311f6
EP		 1306 /* If either indir, hash key or function is valid, proceed further.
1307 * Must request at least one change: indir size, hash key or function.
3de0b592 1308 */
f062a384
BH		 1309 if ((rxfh.indir_size &&
1310 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1311 rxfh.indir_size != dev_indir_size) ||
1312 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1313 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
892311f6 1314 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
3de0b592
VD		 1315 return -EINVAL;
1316
f062a384 1317 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
3de0b592
VD		 1318 indir_bytes = dev_indir_size * sizeof(indir[0]);
1319
f062a384 1320 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
3de0b592
VD		 1321 if (!rss_config)
1322 return -ENOMEM;
1323
1324 rx_rings.cmd = ETHTOOL_GRXRINGS;
1325 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1326 if (ret)
1327 goto out;
1328
f062a384
BH		 1329 /* rxfh.indir_size == 0 means reset the indir table to default.
1330 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
3de0b592 1331 */
f062a384
BH		 1332 if (rxfh.indir_size &&
1333 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
3de0b592
VD		 1334 indir = (u32 *)rss_config;
1335 ret = ethtool_copy_validate_indir(indir,
1336 useraddr + rss_cfg_offset,
1337 &rx_rings,
f062a384 1338 rxfh.indir_size);
3de0b592 1339 if (ret)
7850f63f 1340 goto out;
f062a384 1341 } else if (rxfh.indir_size == 0) {
3de0b592
VD		 1342 indir = (u32 *)rss_config;
1343 for (i = 0; i < dev_indir_size; i++)
1344 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1345 }
278bc429 1346
f062a384 1347 if (rxfh.key_size) {
3de0b592
VD		 1348 hkey = rss_config + indir_bytes;
1349 if (copy_from_user(hkey,
1350 useraddr + rss_cfg_offset + indir_bytes,
f062a384 1351 rxfh.key_size)) {
3de0b592
VD		 1352 ret = -EFAULT;
1353 goto out;
278bc429 1354 }
7850f63f
BH		 1355 }
1356
892311f6 1357 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
d4ab4286
KJ		 1358 if (ret)
1359 goto out;
1360
1361 /* indicate whether rxfh was set to default */
1362 if (rxfh.indir_size == 0)
1363 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1364 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1365 dev->priv_flags |= IFF_RXFH_CONFIGURED;
a5b6ee29
BH		 1366
1367out:
3de0b592 1368 kfree(rss_config);
a5b6ee29
BH		 1369 return ret;
1370}
1371
1da177e4
LT		 1372static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1373{
1374 struct ethtool_regs regs;
76fd8593 1375 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 1376 void *regbuf;
1377 int reglen, ret;
1378
1379 if (!ops->get_regs || !ops->get_regs_len)
1380 return -EOPNOTSUPP;
1381
1382 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1383 return -EFAULT;
1384
1385 reglen = ops->get_regs_len(dev);
1386 if (regs.len > reglen)
1387 regs.len = reglen;
1388
b7c7d01a 1389 regbuf = vzalloc(reglen);
67ae7cf1 1390 if (reglen && !regbuf)
1da177e4
LT		 1391 return -ENOMEM;
1392
1393 ops->get_regs(dev, &regs, regbuf);
1394
1395 ret = -EFAULT;
1396 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1397 goto out;
1398 useraddr += offsetof(struct ethtool_regs, data);
67ae7cf1 1399 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1da177e4
LT		 1400 goto out;
1401 ret = 0;
1402
1403 out:
a77f5db3 1404 vfree(regbuf);
1da177e4
LT		 1405 return ret;
1406}
1407
d73d3a8c
BH		 1408static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1409{
1410 struct ethtool_value reset;
1411 int ret;
1412
1413 if (!dev->ethtool_ops->reset)
1414 return -EOPNOTSUPP;
1415
1416 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1417 return -EFAULT;
1418
1419 ret = dev->ethtool_ops->reset(dev, &reset.data);
1420 if (ret)
1421 return ret;
1422
1423 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1424 return -EFAULT;
1425 return 0;
1426}
1427
1da177e4
LT		 1428static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1429{
8e557421 1430 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1da177e4
LT		 1431
1432 if (!dev->ethtool_ops->get_wol)
1433 return -EOPNOTSUPP;
1434
1435 dev->ethtool_ops->get_wol(dev, &wol);
1436
1437 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1438 return -EFAULT;
1439 return 0;
1440}
1441
1442static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1443{
1444 struct ethtool_wolinfo wol;
1445
1446 if (!dev->ethtool_ops->set_wol)
1447 return -EOPNOTSUPP;
1448
1449 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1450 return -EFAULT;
1451
1452 return dev->ethtool_ops->set_wol(dev, &wol);
1453}
1454
80f12ecc
YM		 1455static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1456{
1457 struct ethtool_eee edata;
1458 int rc;
1459
1460 if (!dev->ethtool_ops->get_eee)
1461 return -EOPNOTSUPP;
1462
1463 memset(&edata, 0, sizeof(struct ethtool_eee));
1464 edata.cmd = ETHTOOL_GEEE;
1465 rc = dev->ethtool_ops->get_eee(dev, &edata);
1466
1467 if (rc)
1468 return rc;
1469
1470 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1471 return -EFAULT;
1472
1473 return 0;
1474}
1475
1476static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1477{
1478 struct ethtool_eee edata;
1479
1480 if (!dev->ethtool_ops->set_eee)
1481 return -EOPNOTSUPP;
1482
1483 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1484 return -EFAULT;
1485
1486 return dev->ethtool_ops->set_eee(dev, &edata);
1487}
1488
1da177e4
LT		 1489static int ethtool_nway_reset(struct net_device *dev)
1490{
1491 if (!dev->ethtool_ops->nway_reset)
1492 return -EOPNOTSUPP;
1493
1494 return dev->ethtool_ops->nway_reset(dev);
1495}
1496
e596e6e4
BH		 1497static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1498{
1499 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1500
1501 if (!dev->ethtool_ops->get_link)
1502 return -EOPNOTSUPP;
1503
1504 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1505
1506 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1507 return -EFAULT;
1508 return 0;
1509}
1510
081d094e
BH		 1511static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1512 int (*getter)(struct net_device *,
1513 struct ethtool_eeprom *, u8 *),
1514 u32 total_len)
1da177e4
LT		 1515{
1516 struct ethtool_eeprom eeprom;
b131dd5d
MSB		 1517 void __user *userbuf = useraddr + sizeof(eeprom);
1518 u32 bytes_remaining;
1da177e4 1519 u8 *data;
b131dd5d 1520 int ret = 0;
1da177e4 1521
1da177e4
LT		 1522 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1523 return -EFAULT;
1524
1525 /* Check for wrap and zero */
1526 if (eeprom.offset + eeprom.len <= eeprom.offset)
1527 return -EINVAL;
1528
1529 /* Check for exceeding total eeprom len */
081d094e 1530 if (eeprom.offset + eeprom.len > total_len)
1da177e4
LT		 1531 return -EINVAL;
1532
b131dd5d 1533 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1534 if (!data)
1535 return -ENOMEM;
1536
b131dd5d
MSB		 1537 bytes_remaining = eeprom.len;
1538 while (bytes_remaining > 0) {
1539 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1540
081d094e 1541 ret = getter(dev, &eeprom, data);
b131dd5d
MSB		 1542 if (ret)
1543 break;
1544 if (copy_to_user(userbuf, data, eeprom.len)) {
1545 ret = -EFAULT;
1546 break;
1547 }
1548 userbuf += eeprom.len;
1549 eeprom.offset += eeprom.len;
1550 bytes_remaining -= eeprom.len;
1551 }
1da177e4 1552
c5835df9
MSB		 1553 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1554 eeprom.offset -= eeprom.len;
1555 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1556 ret = -EFAULT;
1557
1da177e4
LT		 1558 kfree(data);
1559 return ret;
1560}
1561
081d094e
BH		 1562static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1563{
1564 const struct ethtool_ops *ops = dev->ethtool_ops;
1565
e0fb6fb6
GR		 1566 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1567 !ops->get_eeprom_len(dev))
081d094e
BH		 1568 return -EOPNOTSUPP;
1569
1570 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1571 ops->get_eeprom_len(dev));
1572}
1573
1da177e4
LT		 1574static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1575{
1576 struct ethtool_eeprom eeprom;
76fd8593 1577 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 1578 void __user *userbuf = useraddr + sizeof(eeprom);
1579 u32 bytes_remaining;
1da177e4 1580 u8 *data;
b131dd5d 1581 int ret = 0;
1da177e4 1582
e0fb6fb6
GR		 1583 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1584 !ops->get_eeprom_len(dev))
1da177e4
LT		 1585 return -EOPNOTSUPP;
1586
1587 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1588 return -EFAULT;
1589
1590 /* Check for wrap and zero */
1591 if (eeprom.offset + eeprom.len <= eeprom.offset)
1592 return -EINVAL;
1593
1594 /* Check for exceeding total eeprom len */
1595 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1596 return -EINVAL;
1597
b131dd5d 1598 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1599 if (!data)
1600 return -ENOMEM;
1601
b131dd5d
MSB		 1602 bytes_remaining = eeprom.len;
1603 while (bytes_remaining > 0) {
1604 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1605
1606 if (copy_from_user(data, userbuf, eeprom.len)) {
1607 ret = -EFAULT;
1608 break;
1609 }
1610 ret = ops->set_eeprom(dev, &eeprom, data);
1611 if (ret)
1612 break;
1613 userbuf += eeprom.len;
1614 eeprom.offset += eeprom.len;
1615 bytes_remaining -= eeprom.len;
1616 }
1da177e4 1617
1da177e4
LT		 1618 kfree(data);
1619 return ret;
1620}
1621
97f8aefb 1622static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1623 void __user *useraddr)
1da177e4 1624{
8e557421 1625 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1da177e4
LT		 1626
1627 if (!dev->ethtool_ops->get_coalesce)
1628 return -EOPNOTSUPP;
1629
1630 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1631
1632 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1633 return -EFAULT;
1634 return 0;
1635}
1636
97f8aefb 1637static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1638 void __user *useraddr)
1da177e4
LT		 1639{
1640 struct ethtool_coalesce coalesce;
1641
fa04ae5c 1642 if (!dev->ethtool_ops->set_coalesce)
1da177e4
LT		 1643 return -EOPNOTSUPP;
1644
1645 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1646 return -EFAULT;
1647
1648 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1649}
1650
1651static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1652{
8e557421 1653 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1da177e4
LT		 1654
1655 if (!dev->ethtool_ops->get_ringparam)
1656 return -EOPNOTSUPP;
1657
1658 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1659
1660 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1661 return -EFAULT;
1662 return 0;
1663}
1664
1665static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1666{
1667 struct ethtool_ringparam ringparam;
1668
1669 if (!dev->ethtool_ops->set_ringparam)
1670 return -EOPNOTSUPP;
1671
1672 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1673 return -EFAULT;
1674
1675 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1676}
1677
8b5933c3 1678static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1679 void __user *useraddr)
1680{
1681 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1682
1683 if (!dev->ethtool_ops->get_channels)
1684 return -EOPNOTSUPP;
1685
1686 dev->ethtool_ops->get_channels(dev, &channels);
1687
1688 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1689 return -EFAULT;
1690 return 0;
1691}
1692
1693static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1694 void __user *useraddr)
1695{
8bf36862 1696 struct ethtool_channels channels, max;
d4ab4286 1697 u32 max_rx_in_use = 0;
8b5933c3 1698
8bf36862 1699 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
8b5933c3 1700 return -EOPNOTSUPP;
1701
1702 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1703 return -EFAULT;
1704
8bf36862
KJ		 1705 dev->ethtool_ops->get_channels(dev, &max);
1706
1707 /* ensure new counts are within the maximums */
1708 if ((channels.rx_count > max.max_rx) ||
1709 (channels.tx_count > max.max_tx) ||
1710 (channels.combined_count > max.max_combined) ||
1711 (channels.other_count > max.max_other))
1712 return -EINVAL;
1713
d4ab4286
KJ		 1714 /* ensure the new Rx count fits within the configured Rx flow
1715 * indirection table settings */
1716 if (netif_is_rxfh_configured(dev) &&
1717 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1718 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1719 return -EINVAL;
1720
8b5933c3 1721 return dev->ethtool_ops->set_channels(dev, &channels);
1722}
1723
1da177e4
LT		 1724static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1725{
1726 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1727
1728 if (!dev->ethtool_ops->get_pauseparam)
1729 return -EOPNOTSUPP;
1730
1731 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1732
1733 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1734 return -EFAULT;
1735 return 0;
1736}
1737
1738static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1739{
1740 struct ethtool_pauseparam pauseparam;
1741
e1b90c41 1742 if (!dev->ethtool_ops->set_pauseparam)
1da177e4
LT		 1743 return -EOPNOTSUPP;
1744
1745 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1746 return -EFAULT;
1747
1748 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1749}
1750
1da177e4
LT		 1751static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1752{
1753 struct ethtool_test test;
76fd8593 1754 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1755 u64 *data;
ff03d49f 1756 int ret, test_len;
1da177e4 1757
a9828ec6 1758 if (!ops->self_test || !ops->get_sset_count)
1da177e4
LT		 1759 return -EOPNOTSUPP;
1760
a9828ec6 1761 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
ff03d49f
JG		 1762 if (test_len < 0)
1763 return test_len;
1764 WARN_ON(test_len == 0);
1765
1da177e4
LT		 1766 if (copy_from_user(&test, useraddr, sizeof(test)))
1767 return -EFAULT;
1768
ff03d49f
JG		 1769 test.len = test_len;
1770 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1da177e4
LT		 1771 if (!data)
1772 return -ENOMEM;
1773
1774 ops->self_test(dev, &test, data);
1775
1776 ret = -EFAULT;
1777 if (copy_to_user(useraddr, &test, sizeof(test)))
1778 goto out;
1779 useraddr += sizeof(test);
1780 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1781 goto out;
1782 ret = 0;
1783
1784 out:
1785 kfree(data);
1786 return ret;
1787}
1788
1789static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1790{
1791 struct ethtool_gstrings gstrings;
1da177e4
LT		 1792 u8 *data;
1793 int ret;
1794
1da177e4
LT		 1795 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1796 return -EFAULT;
1797
340ae165 1798 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
a9828ec6
BH		 1799 if (ret < 0)
1800 return ret;
1801
1802 gstrings.len = ret;
1da177e4 1803
077cb37f 1804 data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
1da177e4
LT		 1805 if (!data)
1806 return -ENOMEM;
1807
340ae165 1808 __ethtool_get_strings(dev, gstrings.string_set, data);
1da177e4
LT		 1809
1810 ret = -EFAULT;
1811 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1812 goto out;
1813 useraddr += sizeof(gstrings);
1814 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1815 goto out;
1816 ret = 0;
1817
340ae165 1818out:
1da177e4
LT		 1819 kfree(data);
1820 return ret;
1821}
1822
1823static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1824{
1825 struct ethtool_value id;
68f512f2 1826 static bool busy;
c03a14e8 1827 const struct ethtool_ops *ops = dev->ethtool_ops;
68f512f2 1828 int rc;
1da177e4 1829
c03a14e8 1830 if (!ops->set_phys_id)
1da177e4
LT		 1831 return -EOPNOTSUPP;
1832
68f512f2
BH		 1833 if (busy)
1834 return -EBUSY;
1835
1da177e4
LT		 1836 if (copy_from_user(&id, useraddr, sizeof(id)))
1837 return -EFAULT;
1838
c03a14e8 1839 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
fce55922 1840 if (rc < 0)
68f512f2
BH		 1841 return rc;
1842
1843 /* Drop the RTNL lock while waiting, but prevent reentry or
1844 * removal of the device.
1845 */
1846 busy = true;
1847 dev_hold(dev);
1848 rtnl_unlock();
1849
1850 if (rc == 0) {
1851 /* Driver will handle this itself */
1852 schedule_timeout_interruptible(
143780c6 1853 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
68f512f2 1854 } else {
fce55922
AB		 1855 /* Driver expects to be called at twice the frequency in rc */
1856 int n = rc * 2, i, interval = HZ / n;
1857
1858 /* Count down seconds */
68f512f2 1859 do {
fce55922
AB		 1860 /* Count down iterations per second */
1861 i = n;
1862 do {
1863 rtnl_lock();
c03a14e8 1864 rc = ops->set_phys_id(dev,
fce55922
AB		 1865 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1866 rtnl_unlock();
1867 if (rc)
1868 break;
1869 schedule_timeout_interruptible(interval);
1870 } while (!signal_pending(current) && --i != 0);
68f512f2
BH		 1871 } while (!signal_pending(current) &&
1872 (id.data == 0 || --id.data != 0));
1873 }
1874
1875 rtnl_lock();
1876 dev_put(dev);
1877 busy = false;
1878
c03a14e8 1879 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
68f512f2 1880 return rc;
1da177e4
LT		 1881}
1882
1883static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1884{
1885 struct ethtool_stats stats;
76fd8593 1886 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1887 u64 *data;
ff03d49f 1888 int ret, n_stats;
1da177e4 1889
a9828ec6 1890 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1da177e4
LT		 1891 return -EOPNOTSUPP;
1892
a9828ec6 1893 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
ff03d49f
JG		 1894 if (n_stats < 0)
1895 return n_stats;
1896 WARN_ON(n_stats == 0);
1897
1da177e4
LT		 1898 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1899 return -EFAULT;
1900
ff03d49f
JG		 1901 stats.n_stats = n_stats;
1902 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1da177e4
LT		 1903 if (!data)
1904 return -ENOMEM;
1905
1906 ops->get_ethtool_stats(dev, &stats, data);
1907
1908 ret = -EFAULT;
1909 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1910 goto out;
1911 useraddr += sizeof(stats);
1912 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1913 goto out;
1914 ret = 0;
1915
1916 out:
1917 kfree(data);
1918 return ret;
1919}
1920
f3a40945
AL		 1921static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1922{
1923 struct ethtool_stats stats;
1924 struct phy_device *phydev = dev->phydev;
1925 u64 *data;
1926 int ret, n_stats;
1927
1928 if (!phydev)
1929 return -EOPNOTSUPP;
1930
1931 n_stats = phy_get_sset_count(phydev);
1932
1933 if (n_stats < 0)
1934 return n_stats;
1935 WARN_ON(n_stats == 0);
1936
1937 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1938 return -EFAULT;
1939
1940 stats.n_stats = n_stats;
1941 data = kmalloc_array(n_stats, sizeof(u64), GFP_USER);
1942 if (!data)
1943 return -ENOMEM;
1944
1945 mutex_lock(&phydev->lock);
1946 phydev->drv->get_stats(phydev, &stats, data);
1947 mutex_unlock(&phydev->lock);
1948
1949 ret = -EFAULT;
1950 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1951 goto out;
1952 useraddr += sizeof(stats);
1953 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1954 goto out;
1955 ret = 0;
1956
1957 out:
1958 kfree(data);
1959 return ret;
1960}
1961
0bf0519d 1962static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
a6f9a705
JW		 1963{
1964 struct ethtool_perm_addr epaddr;
a6f9a705 1965
313674af 1966 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
a6f9a705
JW		 1967 return -EFAULT;
1968
313674af
MW		 1969 if (epaddr.size < dev->addr_len)
1970 return -ETOOSMALL;
1971 epaddr.size = dev->addr_len;
a6f9a705 1972
a6f9a705 1973 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
313674af 1974 return -EFAULT;
a6f9a705 1975 useraddr += sizeof(epaddr);
313674af
MW		 1976 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1977 return -EFAULT;
1978 return 0;
a6f9a705
JW		 1979}
1980
13c99b24
JG		 1981static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1982 u32 cmd, u32 (*actor)(struct net_device *))
3ae7c0b2 1983{
8e557421 1984 struct ethtool_value edata = { .cmd = cmd };
3ae7c0b2 1985
13c99b24 1986 if (!actor)
3ae7c0b2
JG		 1987 return -EOPNOTSUPP;
1988
13c99b24 1989 edata.data = actor(dev);
3ae7c0b2
JG		 1990
1991 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1992 return -EFAULT;
1993 return 0;
1994}
1995
13c99b24
JG		 1996static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1997 void (*actor)(struct net_device *, u32))
3ae7c0b2
JG		 1998{
1999 struct ethtool_value edata;
2000
13c99b24 2001 if (!actor)
3ae7c0b2
JG		 2002 return -EOPNOTSUPP;
2003
2004 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2005 return -EFAULT;
2006
13c99b24 2007 actor(dev, edata.data);
339bf024
JG		 2008 return 0;
2009}
2010
13c99b24
JG		 2011static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2012 int (*actor)(struct net_device *, u32))
339bf024
JG		 2013{
2014 struct ethtool_value edata;
2015
13c99b24 2016 if (!actor)
339bf024
JG		 2017 return -EOPNOTSUPP;
2018
2019 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2020 return -EFAULT;
2021
13c99b24 2022 return actor(dev, edata.data);
339bf024
JG		 2023}
2024
97f8aefb 2025static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2026 char __user *useraddr)
05c6a8d7
AK		 2027{
2028 struct ethtool_flash efl;
2029
2030 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2031 return -EFAULT;
2032
2033 if (!dev->ethtool_ops->flash_device)
2034 return -EOPNOTSUPP;
2035
786f5281
BH		 2036 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2037
05c6a8d7
AK		 2038 return dev->ethtool_ops->flash_device(dev, &efl);
2039}
2040
29dd54b7
AC		 2041static int ethtool_set_dump(struct net_device *dev,
2042 void __user *useraddr)
2043{
2044 struct ethtool_dump dump;
2045
2046 if (!dev->ethtool_ops->set_dump)
2047 return -EOPNOTSUPP;
2048
2049 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2050 return -EFAULT;
2051
2052 return dev->ethtool_ops->set_dump(dev, &dump);
2053}
2054
2055static int ethtool_get_dump_flag(struct net_device *dev,
2056 void __user *useraddr)
2057{
2058 int ret;
2059 struct ethtool_dump dump;
2060 const struct ethtool_ops *ops = dev->ethtool_ops;
2061
c03a14e8 2062 if (!ops->get_dump_flag)
29dd54b7
AC		 2063 return -EOPNOTSUPP;
2064
2065 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2066 return -EFAULT;
2067
2068 ret = ops->get_dump_flag(dev, &dump);
2069 if (ret)
2070 return ret;
2071
2072 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2073 return -EFAULT;
2074 return 0;
2075}
2076
2077static int ethtool_get_dump_data(struct net_device *dev,
2078 void __user *useraddr)
2079{
2080 int ret;
2081 __u32 len;
2082 struct ethtool_dump dump, tmp;
2083 const struct ethtool_ops *ops = dev->ethtool_ops;
2084 void *data = NULL;
2085
c03a14e8 2086 if (!ops->get_dump_data || !ops->get_dump_flag)
29dd54b7
AC		 2087 return -EOPNOTSUPP;
2088
2089 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2090 return -EFAULT;
2091
2092 memset(&tmp, 0, sizeof(tmp));
2093 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2094 ret = ops->get_dump_flag(dev, &tmp);
2095 if (ret)
2096 return ret;
2097
c590b5e2 2098 len = min(tmp.len, dump.len);
29dd54b7
AC		 2099 if (!len)
2100 return -EFAULT;
2101
c590b5e2
MS		 2102 /* Don't ever let the driver think there's more space available
2103 * than it requested with .get_dump_flag().
2104 */
2105 dump.len = len;
2106
2107 /* Always allocate enough space to hold the whole thing so that the
2108 * driver does not need to check the length and bother with partial
2109 * dumping.
2110 */
29dd54b7
AC		 2111 data = vzalloc(tmp.len);
2112 if (!data)
2113 return -ENOMEM;
2114 ret = ops->get_dump_data(dev, &dump, data);
2115 if (ret)
2116 goto out;
2117
c590b5e2
MS		 2118 /* There are two sane possibilities:
2119 * 1. The driver's .get_dump_data() does not touch dump.len.
2120 * 2. Or it may set dump.len to how much it really writes, which
2121 * should be tmp.len (or len if it can do a partial dump).
2122 * In any case respond to userspace with the actual length of data
2123 * it's receiving.
2124 */
2125 WARN_ON(dump.len != len && dump.len != tmp.len);
2126 dump.len = len;
2127
29dd54b7
AC		 2128 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2129 ret = -EFAULT;
2130 goto out;
2131 }
2132 useraddr += offsetof(struct ethtool_dump, data);
2133 if (copy_to_user(useraddr, data, len))
2134 ret = -EFAULT;
2135out:
2136 vfree(data);
2137 return ret;
2138}
2139
c8f3a8c3
RC		 2140static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2141{
2142 int err = 0;
2143 struct ethtool_ts_info info;
2144 const struct ethtool_ops *ops = dev->ethtool_ops;
2145 struct phy_device *phydev = dev->phydev;
2146
2147 memset(&info, 0, sizeof(info));
2148 info.cmd = ETHTOOL_GET_TS_INFO;
2149
2150 if (phydev && phydev->drv && phydev->drv->ts_info) {
c8f3a8c3 2151 err = phydev->drv->ts_info(phydev, &info);
c03a14e8 2152 } else if (ops->get_ts_info) {
c8f3a8c3 2153 err = ops->get_ts_info(dev, &info);
c8f3a8c3
RC		 2154 } else {
2155 info.so_timestamping =
2156 SOF_TIMESTAMPING_RX_SOFTWARE |
2157 SOF_TIMESTAMPING_SOFTWARE;
2158 info.phc_index = -1;
2159 }
2160
2161 if (err)
2162 return err;
2163
2164 if (copy_to_user(useraddr, &info, sizeof(info)))
2165 err = -EFAULT;
2166
2167 return err;
2168}
2169
2f438366
ES		 2170static int __ethtool_get_module_info(struct net_device *dev,
2171 struct ethtool_modinfo *modinfo)
2172{
2173 const struct ethtool_ops *ops = dev->ethtool_ops;
2174 struct phy_device *phydev = dev->phydev;
2175
2176 if (phydev && phydev->drv && phydev->drv->module_info)
2177 return phydev->drv->module_info(phydev, modinfo);
2178
2179 if (ops->get_module_info)
2180 return ops->get_module_info(dev, modinfo);
2181
2182 return -EOPNOTSUPP;
2183}
2184
41c3cb6d
SH		 2185static int ethtool_get_module_info(struct net_device *dev,
2186 void __user *useraddr)
2187{
2188 int ret;
2189 struct ethtool_modinfo modinfo;
41c3cb6d
SH		 2190
2191 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2192 return -EFAULT;
2193
2f438366 2194 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2195 if (ret)
2196 return ret;
2197
2198 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2199 return -EFAULT;
2200
2201 return 0;
2202}
2203
2f438366
ES		 2204static int __ethtool_get_module_eeprom(struct net_device *dev,
2205 struct ethtool_eeprom *ee, u8 *data)
2206{
2207 const struct ethtool_ops *ops = dev->ethtool_ops;
2208 struct phy_device *phydev = dev->phydev;
2209
2210 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2211 return phydev->drv->module_eeprom(phydev, ee, data);
2212
2213 if (ops->get_module_eeprom)
2214 return ops->get_module_eeprom(dev, ee, data);
2215
2216 return -EOPNOTSUPP;
2217}
2218
41c3cb6d
SH		 2219static int ethtool_get_module_eeprom(struct net_device *dev,
2220 void __user *useraddr)
2221{
2222 int ret;
2223 struct ethtool_modinfo modinfo;
41c3cb6d 2224
2f438366 2225 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2226 if (ret)
2227 return ret;
2228
2f438366
ES		 2229 return ethtool_get_any_eeprom(dev, useraddr,
2230 __ethtool_get_module_eeprom,
41c3cb6d
SH		 2231 modinfo.eeprom_len);
2232}
2233
f0db9b07
GV		 2234static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2235{
2236 switch (tuna->id) {
2237 case ETHTOOL_RX_COPYBREAK:
1255a505 2238 case ETHTOOL_TX_COPYBREAK:
f0db9b07
GV		 2239 if (tuna->len != sizeof(u32) ||
2240 tuna->type_id != ETHTOOL_TUNABLE_U32)
2241 return -EINVAL;
2242 break;
2243 default:
2244 return -EINVAL;
2245 }
2246
2247 return 0;
2248}
2249
2250static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2251{
2252 int ret;
2253 struct ethtool_tunable tuna;
2254 const struct ethtool_ops *ops = dev->ethtool_ops;
2255 void *data;
2256
2257 if (!ops->get_tunable)
2258 return -EOPNOTSUPP;
2259 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2260 return -EFAULT;
2261 ret = ethtool_tunable_valid(&tuna);
2262 if (ret)
2263 return ret;
2264 data = kmalloc(tuna.len, GFP_USER);
2265 if (!data)
2266 return -ENOMEM;
2267 ret = ops->get_tunable(dev, &tuna, data);
2268 if (ret)
2269 goto out;
2270 useraddr += sizeof(tuna);
2271 ret = -EFAULT;
2272 if (copy_to_user(useraddr, data, tuna.len))
2273 goto out;
2274 ret = 0;
2275
2276out:
2277 kfree(data);
2278 return ret;
2279}
2280
2281static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2282{
2283 int ret;
2284 struct ethtool_tunable tuna;
2285 const struct ethtool_ops *ops = dev->ethtool_ops;
2286 void *data;
2287
2288 if (!ops->set_tunable)
2289 return -EOPNOTSUPP;
2290 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2291 return -EFAULT;
2292 ret = ethtool_tunable_valid(&tuna);
2293 if (ret)
2294 return ret;
2295 data = kmalloc(tuna.len, GFP_USER);
2296 if (!data)
2297 return -ENOMEM;
2298 useraddr += sizeof(tuna);
2299 ret = -EFAULT;
2300 if (copy_from_user(data, useraddr, tuna.len))
2301 goto out;
2302 ret = ops->set_tunable(dev, &tuna, data);
2303
2304out:
2305 kfree(data);
2306 return ret;
2307}
2308
421797b1
KL		 2309static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2310 void __user *useraddr,
2311 struct ethtool_per_queue_op *per_queue_opt)
2312{
2313 u32 bit;
2314 int ret;
2315 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2316
2317 if (!dev->ethtool_ops->get_per_queue_coalesce)
2318 return -EOPNOTSUPP;
2319
2320 useraddr += sizeof(*per_queue_opt);
2321
2322 bitmap_from_u32array(queue_mask,
2323 MAX_NUM_QUEUE,
2324 per_queue_opt->queue_mask,
2325 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2326
2327 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2328 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2329
2330 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2331 if (ret != 0)
2332 return ret;
2333 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2334 return -EFAULT;
2335 useraddr += sizeof(coalesce);
2336 }
2337
2338 return 0;
2339}
2340
f38d138a
KL		 2341static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2342 void __user *useraddr,
2343 struct ethtool_per_queue_op *per_queue_opt)
2344{
2345 u32 bit;
2346 int i, ret = 0;
2347 int n_queue;
2348 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2349 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2350
2351 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2352 (!dev->ethtool_ops->get_per_queue_coalesce))
2353 return -EOPNOTSUPP;
2354
2355 useraddr += sizeof(*per_queue_opt);
2356
2357 bitmap_from_u32array(queue_mask,
2358 MAX_NUM_QUEUE,
2359 per_queue_opt->queue_mask,
2360 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2361 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2362 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2363 if (!backup)
2364 return -ENOMEM;
2365
2366 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2367 struct ethtool_coalesce coalesce;
2368
2369 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2370 if (ret != 0)
2371 goto roll_back;
2372
2373 tmp++;
2374
2375 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2376 ret = -EFAULT;
2377 goto roll_back;
2378 }
2379
2380 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2381 if (ret != 0)
2382 goto roll_back;
2383
2384 useraddr += sizeof(coalesce);
2385 }
2386
2387roll_back:
2388 if (ret != 0) {
2389 tmp = backup;
2390 for_each_set_bit(i, queue_mask, bit) {
2391 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2392 tmp++;
2393 }
2394 }
2395 kfree(backup);
2396
2397 return ret;
2398}
2399
ac2c7ad0
KL		 2400static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2401{
2402 struct ethtool_per_queue_op per_queue_opt;
2403
2404 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2405 return -EFAULT;
2406
2407 switch (per_queue_opt.sub_command) {
421797b1
KL		 2408 case ETHTOOL_GCOALESCE:
2409 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
f38d138a
KL		 2410 case ETHTOOL_SCOALESCE:
2411 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
ac2c7ad0
KL		 2412 default:
2413 return -EOPNOTSUPP;
2414 };
2415}
2416
600fed5e 2417/* The main entry point in this file. Called from net/core/dev_ioctl.c */
1da177e4 2418
881d966b 2419int dev_ethtool(struct net *net, struct ifreq *ifr)
1da177e4 2420{
881d966b 2421 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1da177e4 2422 void __user *useraddr = ifr->ifr_data;
ac2c7ad0 2423 u32 ethcmd, sub_cmd;
1da177e4 2424 int rc;
b29d3145 2425 netdev_features_t old_features;
1da177e4 2426
1da177e4
LT		 2427 if (!dev || !netif_device_present(dev))
2428 return -ENODEV;
2429
97f8aefb 2430 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1da177e4
LT		 2431 return -EFAULT;
2432
ac2c7ad0
KL		 2433 if (ethcmd == ETHTOOL_PERQUEUE) {
2434 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2435 return -EFAULT;
2436 } else {
2437 sub_cmd = ethcmd;
2438 }
75f3123c 2439 /* Allow some commands to be done by anyone */
ac2c7ad0 2440 switch (sub_cmd) {
0fdc100b 2441 case ETHTOOL_GSET:
75f3123c 2442 case ETHTOOL_GDRVINFO:
75f3123c 2443 case ETHTOOL_GMSGLVL:
2da45db2 2444 case ETHTOOL_GLINK:
75f3123c
SH		 2445 case ETHTOOL_GCOALESCE:
2446 case ETHTOOL_GRINGPARAM:
2447 case ETHTOOL_GPAUSEPARAM:
2448 case ETHTOOL_GRXCSUM:
2449 case ETHTOOL_GTXCSUM:
2450 case ETHTOOL_GSG:
f80400a2 2451 case ETHTOOL_GSSET_INFO:
75f3123c 2452 case ETHTOOL_GSTRINGS:
2da45db2 2453 case ETHTOOL_GSTATS:
f3a40945 2454 case ETHTOOL_GPHYSTATS:
75f3123c
SH		 2455 case ETHTOOL_GTSO:
2456 case ETHTOOL_GPERMADDR:
2457 case ETHTOOL_GUFO:
2458 case ETHTOOL_GGSO:
1cab819b 2459 case ETHTOOL_GGRO:
339bf024
JG		 2460 case ETHTOOL_GFLAGS:
2461 case ETHTOOL_GPFLAGS:
0853ad66 2462 case ETHTOOL_GRXFH:
59089d8d
SB		 2463 case ETHTOOL_GRXRINGS:
2464 case ETHTOOL_GRXCLSRLCNT:
2465 case ETHTOOL_GRXCLSRULE:
2466 case ETHTOOL_GRXCLSRLALL:
2da45db2 2467 case ETHTOOL_GRXFHINDIR:
3de0b592 2468 case ETHTOOL_GRSSH:
5455c699 2469 case ETHTOOL_GFEATURES:
2da45db2 2470 case ETHTOOL_GCHANNELS:
c8f3a8c3 2471 case ETHTOOL_GET_TS_INFO:
2da45db2 2472 case ETHTOOL_GEEE:
f0db9b07 2473 case ETHTOOL_GTUNABLE:
75f3123c
SH		 2474 break;
2475 default:
5e1fccc0 2476 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
75f3123c
SH		 2477 return -EPERM;
2478 }
2479
97f8aefb 2480 if (dev->ethtool_ops->begin) {
2481 rc = dev->ethtool_ops->begin(dev);
2482 if (rc < 0)
1da177e4 2483 return rc;
97f8aefb 2484 }
d8a33ac4
SH		 2485 old_features = dev->features;
2486
1da177e4
LT		 2487 switch (ethcmd) {
2488 case ETHTOOL_GSET:
2489 rc = ethtool_get_settings(dev, useraddr);
2490 break;
2491 case ETHTOOL_SSET:
2492 rc = ethtool_set_settings(dev, useraddr);
2493 break;
2494 case ETHTOOL_GDRVINFO:
2495 rc = ethtool_get_drvinfo(dev, useraddr);
1da177e4
LT		 2496 break;
2497 case ETHTOOL_GREGS:
2498 rc = ethtool_get_regs(dev, useraddr);
2499 break;
2500 case ETHTOOL_GWOL:
2501 rc = ethtool_get_wol(dev, useraddr);
2502 break;
2503 case ETHTOOL_SWOL:
2504 rc = ethtool_set_wol(dev, useraddr);
2505 break;
2506 case ETHTOOL_GMSGLVL:
13c99b24
JG		 2507 rc = ethtool_get_value(dev, useraddr, ethcmd,
2508 dev->ethtool_ops->get_msglevel);
1da177e4
LT		 2509 break;
2510 case ETHTOOL_SMSGLVL:
13c99b24
JG		 2511 rc = ethtool_set_value_void(dev, useraddr,
2512 dev->ethtool_ops->set_msglevel);
1da177e4 2513 break;
80f12ecc
YM		 2514 case ETHTOOL_GEEE:
2515 rc = ethtool_get_eee(dev, useraddr);
2516 break;
2517 case ETHTOOL_SEEE:
2518 rc = ethtool_set_eee(dev, useraddr);
2519 break;
1da177e4
LT		 2520 case ETHTOOL_NWAY_RST:
2521 rc = ethtool_nway_reset(dev);
2522 break;
2523 case ETHTOOL_GLINK:
e596e6e4 2524 rc = ethtool_get_link(dev, useraddr);
1da177e4
LT		 2525 break;
2526 case ETHTOOL_GEEPROM:
2527 rc = ethtool_get_eeprom(dev, useraddr);
2528 break;
2529 case ETHTOOL_SEEPROM:
2530 rc = ethtool_set_eeprom(dev, useraddr);
2531 break;
2532 case ETHTOOL_GCOALESCE:
2533 rc = ethtool_get_coalesce(dev, useraddr);
2534 break;
2535 case ETHTOOL_SCOALESCE:
2536 rc = ethtool_set_coalesce(dev, useraddr);
2537 break;
2538 case ETHTOOL_GRINGPARAM:
2539 rc = ethtool_get_ringparam(dev, useraddr);
2540 break;
2541 case ETHTOOL_SRINGPARAM:
2542 rc = ethtool_set_ringparam(dev, useraddr);
2543 break;
2544 case ETHTOOL_GPAUSEPARAM:
2545 rc = ethtool_get_pauseparam(dev, useraddr);
2546 break;
2547 case ETHTOOL_SPAUSEPARAM:
2548 rc = ethtool_set_pauseparam(dev, useraddr);
2549 break;
1da177e4
LT		 2550 case ETHTOOL_TEST:
2551 rc = ethtool_self_test(dev, useraddr);
2552 break;
2553 case ETHTOOL_GSTRINGS:
2554 rc = ethtool_get_strings(dev, useraddr);
2555 break;
2556 case ETHTOOL_PHYS_ID:
2557 rc = ethtool_phys_id(dev, useraddr);
2558 break;
2559 case ETHTOOL_GSTATS:
2560 rc = ethtool_get_stats(dev, useraddr);
2561 break;
a6f9a705
JW		 2562 case ETHTOOL_GPERMADDR:
2563 rc = ethtool_get_perm_addr(dev, useraddr);
2564 break;
3ae7c0b2 2565 case ETHTOOL_GFLAGS:
13c99b24 2566 rc = ethtool_get_value(dev, useraddr, ethcmd,
bc5787c6 2567 __ethtool_get_flags);
3ae7c0b2
JG		 2568 break;
2569 case ETHTOOL_SFLAGS:
da8ac86c 2570 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3ae7c0b2 2571 break;
339bf024 2572 case ETHTOOL_GPFLAGS:
13c99b24
JG		 2573 rc = ethtool_get_value(dev, useraddr, ethcmd,
2574 dev->ethtool_ops->get_priv_flags);
339bf024
JG		 2575 break;
2576 case ETHTOOL_SPFLAGS:
13c99b24
JG		 2577 rc = ethtool_set_value(dev, useraddr,
2578 dev->ethtool_ops->set_priv_flags);
339bf024 2579 break;
0853ad66 2580 case ETHTOOL_GRXFH:
59089d8d
SB		 2581 case ETHTOOL_GRXRINGS:
2582 case ETHTOOL_GRXCLSRLCNT:
2583 case ETHTOOL_GRXCLSRULE:
2584 case ETHTOOL_GRXCLSRLALL:
bf988435 2585 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
0853ad66
SB		 2586 break;
2587 case ETHTOOL_SRXFH:
59089d8d
SB		 2588 case ETHTOOL_SRXCLSRLDEL:
2589 case ETHTOOL_SRXCLSRLINS:
bf988435 2590 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
0853ad66 2591 break;
05c6a8d7
AK		 2592 case ETHTOOL_FLASHDEV:
2593 rc = ethtool_flash_device(dev, useraddr);
2594 break;
d73d3a8c
BH		 2595 case ETHTOOL_RESET:
2596 rc = ethtool_reset(dev, useraddr);
2597 break;
723b2f57
JG		 2598 case ETHTOOL_GSSET_INFO:
2599 rc = ethtool_get_sset_info(dev, useraddr);
2600 break;
a5b6ee29
BH		 2601 case ETHTOOL_GRXFHINDIR:
2602 rc = ethtool_get_rxfh_indir(dev, useraddr);
2603 break;
2604 case ETHTOOL_SRXFHINDIR:
2605 rc = ethtool_set_rxfh_indir(dev, useraddr);
2606 break;
3de0b592
VD		 2607 case ETHTOOL_GRSSH:
2608 rc = ethtool_get_rxfh(dev, useraddr);
2609 break;
2610 case ETHTOOL_SRSSH:
2611 rc = ethtool_set_rxfh(dev, useraddr);
2612 break;
5455c699
MM		 2613 case ETHTOOL_GFEATURES:
2614 rc = ethtool_get_features(dev, useraddr);
2615 break;
2616 case ETHTOOL_SFEATURES:
2617 rc = ethtool_set_features(dev, useraddr);
2618 break;
0a417704 2619 case ETHTOOL_GTXCSUM:
e83d360d 2620 case ETHTOOL_GRXCSUM:
0a417704
MM		 2621 case ETHTOOL_GSG:
2622 case ETHTOOL_GTSO:
2623 case ETHTOOL_GUFO:
2624 case ETHTOOL_GGSO:
2625 case ETHTOOL_GGRO:
2626 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2627 break;
2628 case ETHTOOL_STXCSUM:
e83d360d 2629 case ETHTOOL_SRXCSUM:
0a417704
MM		 2630 case ETHTOOL_SSG:
2631 case ETHTOOL_STSO:
2632 case ETHTOOL_SUFO:
2633 case ETHTOOL_SGSO:
2634 case ETHTOOL_SGRO:
2635 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2636 break;
8b5933c3 2637 case ETHTOOL_GCHANNELS:
2638 rc = ethtool_get_channels(dev, useraddr);
2639 break;
2640 case ETHTOOL_SCHANNELS:
2641 rc = ethtool_set_channels(dev, useraddr);
2642 break;
29dd54b7
AC		 2643 case ETHTOOL_SET_DUMP:
2644 rc = ethtool_set_dump(dev, useraddr);
2645 break;
2646 case ETHTOOL_GET_DUMP_FLAG:
2647 rc = ethtool_get_dump_flag(dev, useraddr);
2648 break;
2649 case ETHTOOL_GET_DUMP_DATA:
2650 rc = ethtool_get_dump_data(dev, useraddr);
2651 break;
c8f3a8c3
RC		 2652 case ETHTOOL_GET_TS_INFO:
2653 rc = ethtool_get_ts_info(dev, useraddr);
2654 break;
41c3cb6d
SH		 2655 case ETHTOOL_GMODULEINFO:
2656 rc = ethtool_get_module_info(dev, useraddr);
2657 break;
2658 case ETHTOOL_GMODULEEEPROM:
2659 rc = ethtool_get_module_eeprom(dev, useraddr);
2660 break;
f0db9b07
GV		 2661 case ETHTOOL_GTUNABLE:
2662 rc = ethtool_get_tunable(dev, useraddr);
2663 break;
2664 case ETHTOOL_STUNABLE:
2665 rc = ethtool_set_tunable(dev, useraddr);
2666 break;
f3a40945
AL		 2667 case ETHTOOL_GPHYSTATS:
2668 rc = ethtool_get_phy_stats(dev, useraddr);
2669 break;
ac2c7ad0
KL		 2670 case ETHTOOL_PERQUEUE:
2671 rc = ethtool_set_per_queue(dev, useraddr);
2672 break;
3f1ac7a7
DD		 2673 case ETHTOOL_GLINKSETTINGS:
2674 rc = ethtool_get_link_ksettings(dev, useraddr);
2675 break;
2676 case ETHTOOL_SLINKSETTINGS:
2677 rc = ethtool_set_link_ksettings(dev, useraddr);
2678 break;
1da177e4 2679 default:
61a44b9c 2680 rc = -EOPNOTSUPP;
1da177e4 2681 }
4ec93edb 2682
e71a4783 2683 if (dev->ethtool_ops->complete)
1da177e4 2684 dev->ethtool_ops->complete(dev);
d8a33ac4
SH		 2685
2686 if (old_features != dev->features)
2687 netdev_features_change(dev);
2688
1da177e4 2689 return rc;
1da177e4 2690}
Linux kernel - Deliverables
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