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Merge tag 'pm-4.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
[linux-2.6-block.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",
9d921549
MM		 92
93 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
53692b1d 94 [NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
9d921549
MM		 95 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
96 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
97 [NETIF_F_RXHASH_BIT] = "rx-hashing",
98 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
99 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
100 [NETIF_F_LOOPBACK_BIT] = "loopback",
36eabda3 101 [NETIF_F_RXFCS_BIT] = "rx-fcs",
5e0c03c8 102 [NETIF_F_RXALL_BIT] = "rx-all",
a6cc0cfa 103 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
d0290214 104 [NETIF_F_BUSY_POLL_BIT] = "busy-poll",
1c78c64e 105 [NETIF_F_HW_TC_BIT] = "hw-tc-offload",
9d921549
MM		 106};
107
892311f6
EP		 108static const char
109rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
110 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
111 [ETH_RSS_HASH_XOR_BIT] = "xor",
112};
113
a4244b0c
HHZ		 114static const char
115tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
116 [ETHTOOL_ID_UNSPEC] = "Unspec",
117 [ETHTOOL_RX_COPYBREAK] = "rx-copybreak",
118 [ETHTOOL_TX_COPYBREAK] = "tx-copybreak",
119};
120
5455c699
MM		 121static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
122{
123 struct ethtool_gfeatures cmd = {
124 .cmd = ETHTOOL_GFEATURES,
125 .size = ETHTOOL_DEV_FEATURE_WORDS,
126 };
475414f6 127 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
5455c699
MM		 128 u32 __user *sizeaddr;
129 u32 copy_size;
475414f6
MM		 130 int i;
131
132 /* in case feature bits run out again */
09da71b1 133 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
475414f6
MM		 134
135 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 136 features[i].available = (u32)(dev->hw_features >> (32 * i));
137 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
138 features[i].active = (u32)(dev->features >> (32 * i));
139 features[i].never_changed =
140 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
475414f6 141 }
5455c699
MM		 142
143 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
144 if (get_user(copy_size, sizeaddr))
145 return -EFAULT;
146
147 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
148 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
149
150 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
151 return -EFAULT;
152 useraddr += sizeof(cmd);
153 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
154 return -EFAULT;
155
156 return 0;
157}
158
159static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
160{
161 struct ethtool_sfeatures cmd;
162 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
475414f6
MM		 163 netdev_features_t wanted = 0, valid = 0;
164 int i, ret = 0;
5455c699
MM		 165
166 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
167 return -EFAULT;
168 useraddr += sizeof(cmd);
169
170 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
171 return -EINVAL;
172
173 if (copy_from_user(features, useraddr, sizeof(features)))
174 return -EFAULT;
175
475414f6 176 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
09da71b1
MM		 177 valid |= (netdev_features_t)features[i].valid << (32 * i);
178 wanted |= (netdev_features_t)features[i].requested << (32 * i);
475414f6
MM		 179 }
180
181 if (valid & ~NETIF_F_ETHTOOL_BITS)
5455c699
MM		 182 return -EINVAL;
183
475414f6
MM		 184 if (valid & ~dev->hw_features) {
185 valid &= dev->hw_features;
5455c699
MM		 186 ret |= ETHTOOL_F_UNSUPPORTED;
187 }
188
475414f6
MM		 189 dev->wanted_features &= ~valid;
190 dev->wanted_features |= wanted & valid;
6cb6a27c 191 __netdev_update_features(dev);
5455c699 192
475414f6 193 if ((dev->wanted_features ^ dev->features) & valid)
5455c699
MM		 194 ret |= ETHTOOL_F_WISH;
195
196 return ret;
197}
198
f3a40945
AL		 199static int phy_get_sset_count(struct phy_device *phydev)
200{
201 int ret;
202
203 if (phydev->drv->get_sset_count &&
204 phydev->drv->get_strings &&
205 phydev->drv->get_stats) {
206 mutex_lock(&phydev->lock);
207 ret = phydev->drv->get_sset_count(phydev);
208 mutex_unlock(&phydev->lock);
209
210 return ret;
211 }
212
213 return -EOPNOTSUPP;
214}
215
340ae165
MM		 216static int __ethtool_get_sset_count(struct net_device *dev, int sset)
217{
218 const struct ethtool_ops *ops = dev->ethtool_ops;
219
5455c699
MM		 220 if (sset == ETH_SS_FEATURES)
221 return ARRAY_SIZE(netdev_features_strings);
222
892311f6
EP		 223 if (sset == ETH_SS_RSS_HASH_FUNCS)
224 return ARRAY_SIZE(rss_hash_func_strings);
225
a4244b0c
HHZ		 226 if (sset == ETH_SS_TUNABLES)
227 return ARRAY_SIZE(tunable_strings);
228
f3a40945
AL		 229 if (sset == ETH_SS_PHY_STATS) {
230 if (dev->phydev)
231 return phy_get_sset_count(dev->phydev);
232 else
233 return -EOPNOTSUPP;
234 }
235
c03a14e8 236 if (ops->get_sset_count && ops->get_strings)
340ae165
MM		 237 return ops->get_sset_count(dev, sset);
238 else
239 return -EOPNOTSUPP;
240}
241
242static void __ethtool_get_strings(struct net_device *dev,
243 u32 stringset, u8 *data)
244{
245 const struct ethtool_ops *ops = dev->ethtool_ops;
246
5455c699
MM		 247 if (stringset == ETH_SS_FEATURES)
248 memcpy(data, netdev_features_strings,
249 sizeof(netdev_features_strings));
892311f6
EP		 250 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
251 memcpy(data, rss_hash_func_strings,
252 sizeof(rss_hash_func_strings));
a4244b0c
HHZ		 253 else if (stringset == ETH_SS_TUNABLES)
254 memcpy(data, tunable_strings, sizeof(tunable_strings));
f3a40945
AL		 255 else if (stringset == ETH_SS_PHY_STATS) {
256 struct phy_device *phydev = dev->phydev;
257
258 if (phydev) {
259 mutex_lock(&phydev->lock);
260 phydev->drv->get_strings(phydev, data);
261 mutex_unlock(&phydev->lock);
262 } else {
263 return;
264 }
265 } else
5455c699
MM		 266 /* ops->get_strings is valid because checked earlier */
267 ops->get_strings(dev, stringset, data);
340ae165
MM		 268}
269
c8f44aff 270static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
0a417704
MM		 271{
272 /* feature masks of legacy discrete ethtool ops */
273
274 switch (eth_cmd) {
275 case ETHTOOL_GTXCSUM:
276 case ETHTOOL_STXCSUM:
a188222b 277 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
e83d360d
MM		 278 case ETHTOOL_GRXCSUM:
279 case ETHTOOL_SRXCSUM:
280 return NETIF_F_RXCSUM;
0a417704
MM		 281 case ETHTOOL_GSG:
282 case ETHTOOL_SSG:
283 return NETIF_F_SG;
284 case ETHTOOL_GTSO:
285 case ETHTOOL_STSO:
286 return NETIF_F_ALL_TSO;
287 case ETHTOOL_GUFO:
288 case ETHTOOL_SUFO:
289 return NETIF_F_UFO;
290 case ETHTOOL_GGSO:
291 case ETHTOOL_SGSO:
292 return NETIF_F_GSO;
293 case ETHTOOL_GGRO:
294 case ETHTOOL_SGRO:
295 return NETIF_F_GRO;
296 default:
297 BUG();
298 }
299}
300
0a417704
MM		 301static int ethtool_get_one_feature(struct net_device *dev,
302 char __user *useraddr, u32 ethcmd)
303{
c8f44aff 304 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
0a417704
MM		 305 struct ethtool_value edata = {
306 .cmd = ethcmd,
86794881 307 .data = !!(dev->features & mask),
0a417704 308 };
0a417704 309
0a417704
MM		 310 if (copy_to_user(useraddr, &edata, sizeof(edata)))
311 return -EFAULT;
312 return 0;
313}
314
0a417704
MM		 315static int ethtool_set_one_feature(struct net_device *dev,
316 void __user *useraddr, u32 ethcmd)
317{
318 struct ethtool_value edata;
c8f44aff 319 netdev_features_t mask;
0a417704
MM		 320
321 if (copy_from_user(&edata, useraddr, sizeof(edata)))
322 return -EFAULT;
323
86794881
MM		 324 mask = ethtool_get_feature_mask(ethcmd);
325 mask &= dev->hw_features;
bc5787c6
MM		 326 if (!mask)
327 return -EOPNOTSUPP;
86794881 328
bc5787c6
MM		 329 if (edata.data)
330 dev->wanted_features |= mask;
331 else
332 dev->wanted_features &= ~mask;
86794881 333
bc5787c6 334 __netdev_update_features(dev);
86794881 335
bc5787c6
MM		 336 return 0;
337}
338
02b3a552
MM		 339#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
340 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
f646968f
PM		 341#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
342 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
343 NETIF_F_RXHASH)
bc5787c6
MM		 344
345static u32 __ethtool_get_flags(struct net_device *dev)
346{
02b3a552
MM		 347 u32 flags = 0;
348
8a73125c
DF		 349 if (dev->features & NETIF_F_LRO)
350 flags |= ETH_FLAG_LRO;
351 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
352 flags |= ETH_FLAG_RXVLAN;
353 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
354 flags |= ETH_FLAG_TXVLAN;
355 if (dev->features & NETIF_F_NTUPLE)
356 flags |= ETH_FLAG_NTUPLE;
357 if (dev->features & NETIF_F_RXHASH)
358 flags |= ETH_FLAG_RXHASH;
02b3a552
MM		 359
360 return flags;
0a417704
MM		 361}
362
bc5787c6 363static int __ethtool_set_flags(struct net_device *dev, u32 data)
da8ac86c 364{
c8f44aff 365 netdev_features_t features = 0, changed;
da8ac86c 366
02b3a552 367 if (data & ~ETH_ALL_FLAGS)
da8ac86c
MM		 368 return -EINVAL;
369
8a73125c
DF		 370 if (data & ETH_FLAG_LRO)
371 features |= NETIF_F_LRO;
372 if (data & ETH_FLAG_RXVLAN)
373 features |= NETIF_F_HW_VLAN_CTAG_RX;
374 if (data & ETH_FLAG_TXVLAN)
375 features |= NETIF_F_HW_VLAN_CTAG_TX;
376 if (data & ETH_FLAG_NTUPLE)
377 features |= NETIF_F_NTUPLE;
378 if (data & ETH_FLAG_RXHASH)
379 features |= NETIF_F_RXHASH;
02b3a552 380
da8ac86c 381 /* allow changing only bits set in hw_features */
02b3a552 382 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
da8ac86c
MM		 383 if (changed & ~dev->hw_features)
384 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
385
386 dev->wanted_features =
02b3a552 387 (dev->wanted_features & ~changed) | (features & changed);
da8ac86c 388
6cb6a27c 389 __netdev_update_features(dev);
da8ac86c
MM		 390
391 return 0;
392}
393
6d62b4d5
PR		 394void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
395 u32 legacy_u32)
3f1ac7a7
DD		 396{
397 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
398 dst[0] = legacy_u32;
399}
6d62b4d5 400EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
3f1ac7a7
DD		 401
402/* return false if src had higher bits set. lower bits always updated. */
6d62b4d5
PR		 403bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
404 const unsigned long *src)
3f1ac7a7
DD		 405{
406 bool retval = true;
407
408 /* TODO: following test will soon always be true */
409 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
410 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
411
412 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
413 bitmap_fill(ext, 32);
414 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
415 if (bitmap_intersects(ext, src,
416 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
417 /* src mask goes beyond bit 31 */
418 retval = false;
419 }
420 }
421 *legacy_u32 = src[0];
422 return retval;
423}
6d62b4d5 424EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
3f1ac7a7
DD		 425
426/* return false if legacy contained non-0 deprecated fields
427 * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
428 */
429static bool
430convert_legacy_settings_to_link_ksettings(
431 struct ethtool_link_ksettings *link_ksettings,
432 const struct ethtool_cmd *legacy_settings)
433{
434 bool retval = true;
435
436 memset(link_ksettings, 0, sizeof(*link_ksettings));
437
438 /* This is used to tell users that driver is still using these
439 * deprecated legacy fields, and they should not use
440 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
441 */
442 if (legacy_settings->transceiver ||
443 legacy_settings->maxtxpkt ||
444 legacy_settings->maxrxpkt)
445 retval = false;
446
6d62b4d5 447 ethtool_convert_legacy_u32_to_link_mode(
3f1ac7a7
DD		 448 link_ksettings->link_modes.supported,
449 legacy_settings->supported);
6d62b4d5 450 ethtool_convert_legacy_u32_to_link_mode(
3f1ac7a7
DD		 451 link_ksettings->link_modes.advertising,
452 legacy_settings->advertising);
6d62b4d5 453 ethtool_convert_legacy_u32_to_link_mode(
3f1ac7a7
DD		 454 link_ksettings->link_modes.lp_advertising,
455 legacy_settings->lp_advertising);
456 link_ksettings->base.speed
457 = ethtool_cmd_speed(legacy_settings);
458 link_ksettings->base.duplex
459 = legacy_settings->duplex;
460 link_ksettings->base.port
461 = legacy_settings->port;
462 link_ksettings->base.phy_address
463 = legacy_settings->phy_address;
464 link_ksettings->base.autoneg
465 = legacy_settings->autoneg;
466 link_ksettings->base.mdio_support
467 = legacy_settings->mdio_support;
468 link_ksettings->base.eth_tp_mdix
469 = legacy_settings->eth_tp_mdix;
470 link_ksettings->base.eth_tp_mdix_ctrl
471 = legacy_settings->eth_tp_mdix_ctrl;
472 return retval;
473}
474
475/* return false if ksettings link modes had higher bits
476 * set. legacy_settings always updated (best effort)
477 */
478static bool
479convert_link_ksettings_to_legacy_settings(
480 struct ethtool_cmd *legacy_settings,
481 const struct ethtool_link_ksettings *link_ksettings)
482{
483 bool retval = true;
484
485 memset(legacy_settings, 0, sizeof(*legacy_settings));
486 /* this also clears the deprecated fields in legacy structure:
487 * __u8 transceiver;
488 * __u32 maxtxpkt;
489 * __u32 maxrxpkt;
490 */
491
6d62b4d5 492 retval &= ethtool_convert_link_mode_to_legacy_u32(
3f1ac7a7
DD		 493 &legacy_settings->supported,
494 link_ksettings->link_modes.supported);
6d62b4d5 495 retval &= ethtool_convert_link_mode_to_legacy_u32(
3f1ac7a7
DD		 496 &legacy_settings->advertising,
497 link_ksettings->link_modes.advertising);
6d62b4d5 498 retval &= ethtool_convert_link_mode_to_legacy_u32(
3f1ac7a7
DD		 499 &legacy_settings->lp_advertising,
500 link_ksettings->link_modes.lp_advertising);
501 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
502 legacy_settings->duplex
503 = link_ksettings->base.duplex;
504 legacy_settings->port
505 = link_ksettings->base.port;
506 legacy_settings->phy_address
507 = link_ksettings->base.phy_address;
508 legacy_settings->autoneg
509 = link_ksettings->base.autoneg;
510 legacy_settings->mdio_support
511 = link_ksettings->base.mdio_support;
512 legacy_settings->eth_tp_mdix
513 = link_ksettings->base.eth_tp_mdix;
514 legacy_settings->eth_tp_mdix_ctrl
515 = link_ksettings->base.eth_tp_mdix_ctrl;
516 return retval;
517}
518
519/* number of 32-bit words to store the user's link mode bitmaps */
520#define __ETHTOOL_LINK_MODE_MASK_NU32 \
521 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
522
523/* layout of the struct passed from/to userland */
524struct ethtool_link_usettings {
525 struct ethtool_link_settings base;
526 struct {
527 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
528 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
529 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
530 } link_modes;
531};
532
533/* Internal kernel helper to query a device ethtool_link_settings.
534 *
535 * Backward compatibility note: for compatibility with legacy drivers
536 * that implement only the ethtool_cmd API, this has to work with both
537 * drivers implementing get_link_ksettings API and drivers
538 * implementing get_settings API. When drivers implement get_settings
539 * and report ethtool_cmd deprecated fields
540 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
541 * because the resulting struct ethtool_link_settings does not report them.
542 */
543int __ethtool_get_link_ksettings(struct net_device *dev,
544 struct ethtool_link_ksettings *link_ksettings)
545{
546 int err;
547 struct ethtool_cmd cmd;
548
549 ASSERT_RTNL();
550
551 if (dev->ethtool_ops->get_link_ksettings) {
552 memset(link_ksettings, 0, sizeof(*link_ksettings));
553 return dev->ethtool_ops->get_link_ksettings(dev,
554 link_ksettings);
555 }
556
557 /* driver doesn't support %ethtool_link_ksettings API. revert to
558 * legacy %ethtool_cmd API, unless it's not supported either.
559 * TODO: remove when ethtool_ops::get_settings disappears internally
560 */
3237fc63
DD		 561 if (!dev->ethtool_ops->get_settings)
562 return -EOPNOTSUPP;
563
564 memset(&cmd, 0, sizeof(cmd));
565 cmd.cmd = ETHTOOL_GSET;
566 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 567 if (err < 0)
568 return err;
569
570 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
571 */
572 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
573 return err;
574}
575EXPORT_SYMBOL(__ethtool_get_link_ksettings);
576
577/* convert ethtool_link_usettings in user space to a kernel internal
578 * ethtool_link_ksettings. return 0 on success, errno on error.
579 */
580static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
581 const void __user *from)
582{
583 struct ethtool_link_usettings link_usettings;
584
585 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
586 return -EFAULT;
587
588 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
589 bitmap_from_u32array(to->link_modes.supported,
590 __ETHTOOL_LINK_MODE_MASK_NBITS,
591 link_usettings.link_modes.supported,
592 __ETHTOOL_LINK_MODE_MASK_NU32);
593 bitmap_from_u32array(to->link_modes.advertising,
594 __ETHTOOL_LINK_MODE_MASK_NBITS,
595 link_usettings.link_modes.advertising,
596 __ETHTOOL_LINK_MODE_MASK_NU32);
597 bitmap_from_u32array(to->link_modes.lp_advertising,
598 __ETHTOOL_LINK_MODE_MASK_NBITS,
599 link_usettings.link_modes.lp_advertising,
600 __ETHTOOL_LINK_MODE_MASK_NU32);
601
602 return 0;
603}
604
605/* convert a kernel internal ethtool_link_ksettings to
606 * ethtool_link_usettings in user space. return 0 on success, errno on
607 * error.
608 */
609static int
610store_link_ksettings_for_user(void __user *to,
611 const struct ethtool_link_ksettings *from)
612{
613 struct ethtool_link_usettings link_usettings;
614
615 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
616 bitmap_to_u32array(link_usettings.link_modes.supported,
617 __ETHTOOL_LINK_MODE_MASK_NU32,
618 from->link_modes.supported,
619 __ETHTOOL_LINK_MODE_MASK_NBITS);
620 bitmap_to_u32array(link_usettings.link_modes.advertising,
621 __ETHTOOL_LINK_MODE_MASK_NU32,
622 from->link_modes.advertising,
623 __ETHTOOL_LINK_MODE_MASK_NBITS);
624 bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
625 __ETHTOOL_LINK_MODE_MASK_NU32,
626 from->link_modes.lp_advertising,
627 __ETHTOOL_LINK_MODE_MASK_NBITS);
628
629 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
630 return -EFAULT;
631
632 return 0;
633}
634
635/* Query device for its ethtool_link_settings.
636 *
637 * Backward compatibility note: this function must fail when driver
638 * does not implement ethtool::get_link_ksettings, even if legacy
639 * ethtool_ops::get_settings is implemented. This tells new versions
640 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
641 * this driver, so that they can correctly access the ethtool_cmd
642 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
643 * implements ethtool_ops::get_settings anymore.
644 */
645static int ethtool_get_link_ksettings(struct net_device *dev,
646 void __user *useraddr)
647{
648 int err = 0;
649 struct ethtool_link_ksettings link_ksettings;
650
651 ASSERT_RTNL();
652
653 if (!dev->ethtool_ops->get_link_ksettings)
654 return -EOPNOTSUPP;
655
656 /* handle bitmap nbits handshake */
657 if (copy_from_user(&link_ksettings.base, useraddr,
658 sizeof(link_ksettings.base)))
659 return -EFAULT;
660
661 if (__ETHTOOL_LINK_MODE_MASK_NU32
662 != link_ksettings.base.link_mode_masks_nwords) {
663 /* wrong link mode nbits requested */
664 memset(&link_ksettings, 0, sizeof(link_ksettings));
793cf87d 665 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
3f1ac7a7
DD		 666 /* send back number of words required as negative val */
667 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
668 "need too many bits for link modes!");
669 link_ksettings.base.link_mode_masks_nwords
670 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
671
672 /* copy the base fields back to user, not the link
673 * mode bitmaps
674 */
675 if (copy_to_user(useraddr, &link_ksettings.base,
676 sizeof(link_ksettings.base)))
677 return -EFAULT;
678
679 return 0;
680 }
681
682 /* handshake successful: user/kernel agree on
683 * link_mode_masks_nwords
684 */
685
686 memset(&link_ksettings, 0, sizeof(link_ksettings));
687 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
688 if (err < 0)
689 return err;
690
691 /* make sure we tell the right values to user */
692 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
693 link_ksettings.base.link_mode_masks_nwords
694 = __ETHTOOL_LINK_MODE_MASK_NU32;
695
696 return store_link_ksettings_for_user(useraddr, &link_ksettings);
697}
698
699/* Update device ethtool_link_settings.
700 *
701 * Backward compatibility note: this function must fail when driver
702 * does not implement ethtool::set_link_ksettings, even if legacy
703 * ethtool_ops::set_settings is implemented. This tells new versions
704 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
705 * this driver, so that they can correctly update the ethtool_cmd
706 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
707 * implements ethtool_ops::get_settings anymore.
708 */
709static int ethtool_set_link_ksettings(struct net_device *dev,
710 void __user *useraddr)
711{
712 int err;
713 struct ethtool_link_ksettings link_ksettings;
714
715 ASSERT_RTNL();
716
717 if (!dev->ethtool_ops->set_link_ksettings)
718 return -EOPNOTSUPP;
719
720 /* make sure nbits field has expected value */
721 if (copy_from_user(&link_ksettings.base, useraddr,
722 sizeof(link_ksettings.base)))
723 return -EFAULT;
724
725 if (__ETHTOOL_LINK_MODE_MASK_NU32
726 != link_ksettings.base.link_mode_masks_nwords)
727 return -EINVAL;
728
729 /* copy the whole structure, now that we know it has expected
730 * format
731 */
732 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
733 if (err)
734 return err;
735
736 /* re-check nwords field, just in case */
737 if (__ETHTOOL_LINK_MODE_MASK_NU32
738 != link_ksettings.base.link_mode_masks_nwords)
739 return -EINVAL;
740
741 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
742}
743
3f1ac7a7
DD		 744static void
745warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
746{
747 char name[sizeof(current->comm)];
748
749 pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
750 get_task_comm(name, current), details);
751}
752
753/* Query device for its ethtool_cmd settings.
754 *
755 * Backward compatibility note: for compatibility with legacy ethtool,
756 * this has to work with both drivers implementing get_link_ksettings
757 * API and drivers implementing get_settings API. When drivers
758 * implement get_link_ksettings and report higher link mode bits, a
759 * kernel warning is logged once (with name of 1st driver/device) to
760 * recommend user to upgrade ethtool, but the command is successful
761 * (only the lower link mode bits reported back to user).
762 */
4bc71cb9
JP		 763static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
764{
4bc71cb9
JP		 765 struct ethtool_cmd cmd;
766
3f1ac7a7
DD		 767 ASSERT_RTNL();
768
769 if (dev->ethtool_ops->get_link_ksettings) {
770 /* First, use link_ksettings API if it is supported */
771 int err;
772 struct ethtool_link_ksettings link_ksettings;
773
774 memset(&link_ksettings, 0, sizeof(link_ksettings));
775 err = dev->ethtool_ops->get_link_ksettings(dev,
776 &link_ksettings);
777 if (err < 0)
778 return err;
779 if (!convert_link_ksettings_to_legacy_settings(&cmd,
780 &link_ksettings))
781 warn_incomplete_ethtool_legacy_settings_conversion(
782 "link modes are only partially reported");
783
784 /* send a sensible cmd tag back to user */
785 cmd.cmd = ETHTOOL_GSET;
786 } else {
3f1ac7a7
DD		 787 /* driver doesn't support %ethtool_link_ksettings
788 * API. revert to legacy %ethtool_cmd API, unless it's
789 * not supported either.
790 */
3237fc63
DD		 791 int err;
792
793 if (!dev->ethtool_ops->get_settings)
794 return -EOPNOTSUPP;
795
796 memset(&cmd, 0, sizeof(cmd));
797 cmd.cmd = ETHTOOL_GSET;
798 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 799 if (err < 0)
800 return err;
801 }
1da177e4
LT		 802
803 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
804 return -EFAULT;
3f1ac7a7 805
1da177e4
LT		 806 return 0;
807}
808
3f1ac7a7
DD		 809/* Update device link settings with given ethtool_cmd.
810 *
811 * Backward compatibility note: for compatibility with legacy ethtool,
812 * this has to work with both drivers implementing set_link_ksettings
813 * API and drivers implementing set_settings API. When drivers
814 * implement set_link_ksettings and user's request updates deprecated
815 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
816 * warning is logged once (with name of 1st driver/device) to
817 * recommend user to upgrade ethtool, and the request is rejected.
818 */
1da177e4
LT		 819static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
820{
821 struct ethtool_cmd cmd;
822
3f1ac7a7 823 ASSERT_RTNL();
1da177e4
LT		 824
825 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
826 return -EFAULT;
827
3f1ac7a7
DD		 828 /* first, try new %ethtool_link_ksettings API. */
829 if (dev->ethtool_ops->set_link_ksettings) {
830 struct ethtool_link_ksettings link_ksettings;
831
832 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
833 &cmd))
834 return -EINVAL;
835
836 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
837 link_ksettings.base.link_mode_masks_nwords
838 = __ETHTOOL_LINK_MODE_MASK_NU32;
839 return dev->ethtool_ops->set_link_ksettings(dev,
840 &link_ksettings);
841 }
842
843 /* legacy %ethtool_cmd API */
844
845 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
846 * disappears internally
847 */
848
849 if (!dev->ethtool_ops->set_settings)
850 return -EOPNOTSUPP;
851
1da177e4
LT		 852 return dev->ethtool_ops->set_settings(dev, &cmd);
853}
854
97f8aefb 855static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
856 void __user *useraddr)
1da177e4
LT		 857{
858 struct ethtool_drvinfo info;
76fd8593 859 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 860
1da177e4
LT		 861 memset(&info, 0, sizeof(info));
862 info.cmd = ETHTOOL_GDRVINFO;
c03a14e8 863 if (ops->get_drvinfo) {
01414802
BH		 864 ops->get_drvinfo(dev, &info);
865 } else if (dev->dev.parent && dev->dev.parent->driver) {
866 strlcpy(info.bus_info, dev_name(dev->dev.parent),
867 sizeof(info.bus_info));
868 strlcpy(info.driver, dev->dev.parent->driver->name,
869 sizeof(info.driver));
870 } else {
871 return -EOPNOTSUPP;
872 }
1da177e4 873
723b2f57
JG		 874 /*
875 * this method of obtaining string set info is deprecated;
d17792eb 876 * Use ETHTOOL_GSSET_INFO instead.
723b2f57 877 */
c03a14e8 878 if (ops->get_sset_count) {
ff03d49f
JG		 879 int rc;
880
881 rc = ops->get_sset_count(dev, ETH_SS_TEST);
882 if (rc >= 0)
883 info.testinfo_len = rc;
884 rc = ops->get_sset_count(dev, ETH_SS_STATS);
885 if (rc >= 0)
886 info.n_stats = rc;
339bf024
JG		 887 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
888 if (rc >= 0)
889 info.n_priv_flags = rc;
ff03d49f 890 }
c03a14e8 891 if (ops->get_regs_len)
1da177e4 892 info.regdump_len = ops->get_regs_len(dev);
c03a14e8 893 if (ops->get_eeprom_len)
1da177e4
LT		 894 info.eedump_len = ops->get_eeprom_len(dev);
895
896 if (copy_to_user(useraddr, &info, sizeof(info)))
897 return -EFAULT;
898 return 0;
899}
900
f5c445ed 901static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
97f8aefb 902 void __user *useraddr)
723b2f57
JG		 903{
904 struct ethtool_sset_info info;
723b2f57
JG		 905 u64 sset_mask;
906 int i, idx = 0, n_bits = 0, ret, rc;
907 u32 *info_buf = NULL;
908
723b2f57
JG		 909 if (copy_from_user(&info, useraddr, sizeof(info)))
910 return -EFAULT;
911
912 /* store copy of mask, because we zero struct later on */
913 sset_mask = info.sset_mask;
914 if (!sset_mask)
915 return 0;
916
917 /* calculate size of return buffer */
d17792eb 918 n_bits = hweight64(sset_mask);
723b2f57
JG		 919
920 memset(&info, 0, sizeof(info));
921 info.cmd = ETHTOOL_GSSET_INFO;
922
923 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
924 if (!info_buf)
925 return -ENOMEM;
926
927 /*
928 * fill return buffer based on input bitmask and successful
929 * get_sset_count return
930 */
931 for (i = 0; i < 64; i++) {
932 if (!(sset_mask & (1ULL << i)))
933 continue;
934
340ae165 935 rc = __ethtool_get_sset_count(dev, i);
723b2f57
JG		 936 if (rc >= 0) {
937 info.sset_mask |= (1ULL << i);
938 info_buf[idx++] = rc;
939 }
940 }
941
942 ret = -EFAULT;
943 if (copy_to_user(useraddr, &info, sizeof(info)))
944 goto out;
945
946 useraddr += offsetof(struct ethtool_sset_info, data);
947 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
948 goto out;
949
950 ret = 0;
951
952out:
953 kfree(info_buf);
954 return ret;
955}
956
97f8aefb 957static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
bf988435 958 u32 cmd, void __user *useraddr)
0853ad66 959{
bf988435
BH		 960 struct ethtool_rxnfc info;
961 size_t info_size = sizeof(info);
55664f32 962 int rc;
0853ad66 963
59089d8d 964 if (!dev->ethtool_ops->set_rxnfc)
0853ad66
SB		 965 return -EOPNOTSUPP;
966
bf988435
BH		 967 /* struct ethtool_rxnfc was originally defined for
968 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
969 * members. User-space might still be using that
970 * definition. */
971 if (cmd == ETHTOOL_SRXFH)
972 info_size = (offsetof(struct ethtool_rxnfc, data) +
973 sizeof(info.data));
974
975 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 976 return -EFAULT;
977
55664f32
BH		 978 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
979 if (rc)
980 return rc;
981
982 if (cmd == ETHTOOL_SRXCLSRLINS &&
983 copy_to_user(useraddr, &info, info_size))
984 return -EFAULT;
985
986 return 0;
0853ad66
SB		 987}
988
97f8aefb 989static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
bf988435 990 u32 cmd, void __user *useraddr)
0853ad66
SB		 991{
992 struct ethtool_rxnfc info;
bf988435 993 size_t info_size = sizeof(info);
59089d8d
SB		 994 const struct ethtool_ops *ops = dev->ethtool_ops;
995 int ret;
996 void *rule_buf = NULL;
0853ad66 997
59089d8d 998 if (!ops->get_rxnfc)
0853ad66
SB		 999 return -EOPNOTSUPP;
1000
bf988435
BH		 1001 /* struct ethtool_rxnfc was originally defined for
1002 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1003 * members. User-space might still be using that
1004 * definition. */
1005 if (cmd == ETHTOOL_GRXFH)
1006 info_size = (offsetof(struct ethtool_rxnfc, data) +
1007 sizeof(info.data));
1008
1009 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 1010 return -EFAULT;
1011
59089d8d
SB		 1012 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1013 if (info.rule_cnt > 0) {
db048b69 1014 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
ae6df5f9 1015 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
db048b69 1016 GFP_USER);
59089d8d
SB		 1017 if (!rule_buf)
1018 return -ENOMEM;
1019 }
1020 }
0853ad66 1021
59089d8d
SB		 1022 ret = ops->get_rxnfc(dev, &info, rule_buf);
1023 if (ret < 0)
1024 goto err_out;
1025
1026 ret = -EFAULT;
bf988435 1027 if (copy_to_user(useraddr, &info, info_size))
59089d8d
SB		 1028 goto err_out;
1029
1030 if (rule_buf) {
1031 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1032 if (copy_to_user(useraddr, rule_buf,
1033 info.rule_cnt * sizeof(u32)))
1034 goto err_out;
1035 }
1036 ret = 0;
1037
1038err_out:
c9caceca 1039 kfree(rule_buf);
59089d8d
SB		 1040
1041 return ret;
0853ad66
SB		 1042}
1043
3de0b592
VD		 1044static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1045 struct ethtool_rxnfc *rx_rings,
1046 u32 size)
1047{
fb95cd8d 1048 int i;
3de0b592
VD		 1049
1050 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
fb95cd8d 1051 return -EFAULT;
3de0b592
VD		 1052
1053 /* Validate ring indices */
fb95cd8d
BH		 1054 for (i = 0; i < size; i++)
1055 if (indir[i] >= rx_rings->data)
1056 return -EINVAL;
1057
1058 return 0;
3de0b592
VD		 1059}
1060
ba905f5e 1061u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
960fb622
ED		 1062
1063void netdev_rss_key_fill(void *buffer, size_t len)
1064{
1065 BUG_ON(len > sizeof(netdev_rss_key));
1066 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1067 memcpy(buffer, netdev_rss_key, len);
1068}
1069EXPORT_SYMBOL(netdev_rss_key_fill);
1070
d4ab4286
KJ		 1071static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1072{
1073 u32 dev_size, current_max = 0;
1074 u32 *indir;
1075 int ret;
1076
1077 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1078 !dev->ethtool_ops->get_rxfh)
1079 return -EOPNOTSUPP;
1080 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1081 if (dev_size == 0)
1082 return -EOPNOTSUPP;
1083
1084 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1085 if (!indir)
1086 return -ENOMEM;
1087
1088 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1089 if (ret)
1090 goto out;
1091
1092 while (dev_size--)
1093 current_max = max(current_max, indir[dev_size]);
1094
1095 *max = current_max;
1096
1097out:
1098 kfree(indir);
1099 return ret;
1100}
1101
a5b6ee29
BH		 1102static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1103 void __user *useraddr)
1104{
7850f63f
BH		 1105 u32 user_size, dev_size;
1106 u32 *indir;
a5b6ee29
BH		 1107 int ret;
1108
7850f63f 1109 if (!dev->ethtool_ops->get_rxfh_indir_size ||
fe62d001 1110 !dev->ethtool_ops->get_rxfh)
7850f63f
BH		 1111 return -EOPNOTSUPP;
1112 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1113 if (dev_size == 0)
a5b6ee29
BH		 1114 return -EOPNOTSUPP;
1115
7850f63f 1116 if (copy_from_user(&user_size,
a5b6ee29 1117 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1118 sizeof(user_size)))
a5b6ee29
BH		 1119 return -EFAULT;
1120
7850f63f
BH		 1121 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1122 &dev_size, sizeof(dev_size)))
1123 return -EFAULT;
1124
1125 /* If the user buffer size is 0, this is just a query for the
1126 * device table size. Otherwise, if it's smaller than the
1127 * device table size it's an error.
1128 */
1129 if (user_size < dev_size)
1130 return user_size == 0 ? 0 : -EINVAL;
1131
1132 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1133 if (!indir)
1134 return -ENOMEM;
1135
892311f6 1136 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
a5b6ee29
BH		 1137 if (ret)
1138 goto out;
1139
7850f63f
BH		 1140 if (copy_to_user(useraddr +
1141 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1142 indir, dev_size * sizeof(indir[0])))
a5b6ee29
BH		 1143 ret = -EFAULT;
1144
1145out:
1146 kfree(indir);
1147 return ret;
1148}
1149
1150static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1151 void __user *useraddr)
1152{
7850f63f
BH		 1153 struct ethtool_rxnfc rx_rings;
1154 u32 user_size, dev_size, i;
1155 u32 *indir;
c03a14e8 1156 const struct ethtool_ops *ops = dev->ethtool_ops;
a5b6ee29 1157 int ret;
3de0b592 1158 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
a5b6ee29 1159
fe62d001 1160 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
c03a14e8 1161 !ops->get_rxnfc)
7850f63f 1162 return -EOPNOTSUPP;
c03a14e8
JP		 1163
1164 dev_size = ops->get_rxfh_indir_size(dev);
7850f63f 1165 if (dev_size == 0)
a5b6ee29
BH		 1166 return -EOPNOTSUPP;
1167
7850f63f 1168 if (copy_from_user(&user_size,
a5b6ee29 1169 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1170 sizeof(user_size)))
a5b6ee29
BH		 1171 return -EFAULT;
1172
278bc429 1173 if (user_size != 0 && user_size != dev_size)
7850f63f
BH		 1174 return -EINVAL;
1175
1176 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1177 if (!indir)
1178 return -ENOMEM;
1179
7850f63f 1180 rx_rings.cmd = ETHTOOL_GRXRINGS;
c03a14e8 1181 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
7850f63f
BH		 1182 if (ret)
1183 goto out;
278bc429
BH		 1184
1185 if (user_size == 0) {
1186 for (i = 0; i < dev_size; i++)
1187 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1188 } else {
3de0b592
VD		 1189 ret = ethtool_copy_validate_indir(indir,
1190 useraddr + ringidx_offset,
1191 &rx_rings,
1192 dev_size);
1193 if (ret)
1194 goto out;
1195 }
1196
892311f6 1197 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
d4ab4286
KJ		 1198 if (ret)
1199 goto out;
1200
1201 /* indicate whether rxfh was set to default */
1202 if (user_size == 0)
1203 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1204 else
1205 dev->priv_flags |= IFF_RXFH_CONFIGURED;
3de0b592
VD		 1206
1207out:
1208 kfree(indir);
1209 return ret;
1210}
1211
1212static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1213 void __user *useraddr)
1214{
1215 int ret;
1216 const struct ethtool_ops *ops = dev->ethtool_ops;
f062a384 1217 u32 user_indir_size, user_key_size;
3de0b592 1218 u32 dev_indir_size = 0, dev_key_size = 0;
f062a384 1219 struct ethtool_rxfh rxfh;
3de0b592 1220 u32 total_size;
f062a384 1221 u32 indir_bytes;
3de0b592 1222 u32 *indir = NULL;
892311f6 1223 u8 dev_hfunc = 0;
3de0b592
VD		 1224 u8 *hkey = NULL;
1225 u8 *rss_config;
1226
892311f6 1227 if (!ops->get_rxfh)
3de0b592
VD		 1228 return -EOPNOTSUPP;
1229
1230 if (ops->get_rxfh_indir_size)
1231 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592
VD		 1232 if (ops->get_rxfh_key_size)
1233 dev_key_size = ops->get_rxfh_key_size(dev);
1234
f062a384 1235 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592 1236 return -EFAULT;
f062a384
BH		 1237 user_indir_size = rxfh.indir_size;
1238 user_key_size = rxfh.key_size;
3de0b592 1239
f062a384 1240 /* Check that reserved fields are 0 for now */
892311f6
EP		 1241 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1242 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1243 return -EINVAL;
1244
1245 rxfh.indir_size = dev_indir_size;
1246 rxfh.key_size = dev_key_size;
1247 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
3de0b592
VD		 1248 return -EFAULT;
1249
3de0b592
VD		 1250 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1251 (user_key_size && (user_key_size != dev_key_size)))
1252 return -EINVAL;
1253
1254 indir_bytes = user_indir_size * sizeof(indir[0]);
1255 total_size = indir_bytes + user_key_size;
1256 rss_config = kzalloc(total_size, GFP_USER);
1257 if (!rss_config)
1258 return -ENOMEM;
1259
1260 if (user_indir_size)
1261 indir = (u32 *)rss_config;
1262
1263 if (user_key_size)
1264 hkey = rss_config + indir_bytes;
1265
892311f6
EP		 1266 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1267 if (ret)
1268 goto out;
3de0b592 1269
892311f6
EP		 1270 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1271 &dev_hfunc, sizeof(rxfh.hfunc))) {
1272 ret = -EFAULT;
1273 } else if (copy_to_user(useraddr +
1274 offsetof(struct ethtool_rxfh, rss_config[0]),
1275 rss_config, total_size)) {
1276 ret = -EFAULT;
1277 }
1278out:
3de0b592
VD		 1279 kfree(rss_config);
1280
1281 return ret;
1282}
1283
1284static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1285 void __user *useraddr)
1286{
1287 int ret;
1288 const struct ethtool_ops *ops = dev->ethtool_ops;
1289 struct ethtool_rxnfc rx_rings;
f062a384
BH		 1290 struct ethtool_rxfh rxfh;
1291 u32 dev_indir_size = 0, dev_key_size = 0, i;
3de0b592
VD		 1292 u32 *indir = NULL, indir_bytes = 0;
1293 u8 *hkey = NULL;
1294 u8 *rss_config;
3de0b592
VD		 1295 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1296
892311f6 1297 if (!ops->get_rxnfc || !ops->set_rxfh)
3de0b592
VD		 1298 return -EOPNOTSUPP;
1299
1300 if (ops->get_rxfh_indir_size)
1301 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592 1302 if (ops->get_rxfh_key_size)
d340c862 1303 dev_key_size = ops->get_rxfh_key_size(dev);
3de0b592 1304
f062a384 1305 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592
VD		 1306 return -EFAULT;
1307
f062a384 1308 /* Check that reserved fields are 0 for now */
892311f6
EP		 1309 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1310 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1311 return -EINVAL;
1312
892311f6
EP		 1313 /* If either indir, hash key or function is valid, proceed further.
1314 * Must request at least one change: indir size, hash key or function.
3de0b592 1315 */
f062a384
BH		 1316 if ((rxfh.indir_size &&
1317 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1318 rxfh.indir_size != dev_indir_size) ||
1319 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1320 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
892311f6 1321 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
3de0b592
VD		 1322 return -EINVAL;
1323
f062a384 1324 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
3de0b592
VD		 1325 indir_bytes = dev_indir_size * sizeof(indir[0]);
1326
f062a384 1327 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
3de0b592
VD		 1328 if (!rss_config)
1329 return -ENOMEM;
1330
1331 rx_rings.cmd = ETHTOOL_GRXRINGS;
1332 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1333 if (ret)
1334 goto out;
1335
f062a384
BH		 1336 /* rxfh.indir_size == 0 means reset the indir table to default.
1337 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
3de0b592 1338 */
f062a384
BH		 1339 if (rxfh.indir_size &&
1340 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
3de0b592
VD		 1341 indir = (u32 *)rss_config;
1342 ret = ethtool_copy_validate_indir(indir,
1343 useraddr + rss_cfg_offset,
1344 &rx_rings,
f062a384 1345 rxfh.indir_size);
3de0b592 1346 if (ret)
7850f63f 1347 goto out;
f062a384 1348 } else if (rxfh.indir_size == 0) {
3de0b592
VD		 1349 indir = (u32 *)rss_config;
1350 for (i = 0; i < dev_indir_size; i++)
1351 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1352 }
278bc429 1353
f062a384 1354 if (rxfh.key_size) {
3de0b592
VD		 1355 hkey = rss_config + indir_bytes;
1356 if (copy_from_user(hkey,
1357 useraddr + rss_cfg_offset + indir_bytes,
f062a384 1358 rxfh.key_size)) {
3de0b592
VD		 1359 ret = -EFAULT;
1360 goto out;
278bc429 1361 }
7850f63f
BH		 1362 }
1363
892311f6 1364 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
d4ab4286
KJ		 1365 if (ret)
1366 goto out;
1367
1368 /* indicate whether rxfh was set to default */
1369 if (rxfh.indir_size == 0)
1370 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1371 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1372 dev->priv_flags |= IFF_RXFH_CONFIGURED;
a5b6ee29
BH		 1373
1374out:
3de0b592 1375 kfree(rss_config);
a5b6ee29
BH		 1376 return ret;
1377}
1378
1da177e4
LT		 1379static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1380{
1381 struct ethtool_regs regs;
76fd8593 1382 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 1383 void *regbuf;
1384 int reglen, ret;
1385
1386 if (!ops->get_regs || !ops->get_regs_len)
1387 return -EOPNOTSUPP;
1388
1389 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1390 return -EFAULT;
1391
1392 reglen = ops->get_regs_len(dev);
1393 if (regs.len > reglen)
1394 regs.len = reglen;
1395
b7c7d01a 1396 regbuf = vzalloc(reglen);
67ae7cf1 1397 if (reglen && !regbuf)
1da177e4
LT		 1398 return -ENOMEM;
1399
1400 ops->get_regs(dev, &regs, regbuf);
1401
1402 ret = -EFAULT;
1403 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1404 goto out;
1405 useraddr += offsetof(struct ethtool_regs, data);
67ae7cf1 1406 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1da177e4
LT		 1407 goto out;
1408 ret = 0;
1409
1410 out:
a77f5db3 1411 vfree(regbuf);
1da177e4
LT		 1412 return ret;
1413}
1414
d73d3a8c
BH		 1415static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1416{
1417 struct ethtool_value reset;
1418 int ret;
1419
1420 if (!dev->ethtool_ops->reset)
1421 return -EOPNOTSUPP;
1422
1423 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1424 return -EFAULT;
1425
1426 ret = dev->ethtool_ops->reset(dev, &reset.data);
1427 if (ret)
1428 return ret;
1429
1430 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1431 return -EFAULT;
1432 return 0;
1433}
1434
1da177e4
LT		 1435static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1436{
8e557421 1437 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1da177e4
LT		 1438
1439 if (!dev->ethtool_ops->get_wol)
1440 return -EOPNOTSUPP;
1441
1442 dev->ethtool_ops->get_wol(dev, &wol);
1443
1444 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1445 return -EFAULT;
1446 return 0;
1447}
1448
1449static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1450{
1451 struct ethtool_wolinfo wol;
1452
1453 if (!dev->ethtool_ops->set_wol)
1454 return -EOPNOTSUPP;
1455
1456 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1457 return -EFAULT;
1458
1459 return dev->ethtool_ops->set_wol(dev, &wol);
1460}
1461
80f12ecc
YM		 1462static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1463{
1464 struct ethtool_eee edata;
1465 int rc;
1466
1467 if (!dev->ethtool_ops->get_eee)
1468 return -EOPNOTSUPP;
1469
1470 memset(&edata, 0, sizeof(struct ethtool_eee));
1471 edata.cmd = ETHTOOL_GEEE;
1472 rc = dev->ethtool_ops->get_eee(dev, &edata);
1473
1474 if (rc)
1475 return rc;
1476
1477 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1478 return -EFAULT;
1479
1480 return 0;
1481}
1482
1483static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1484{
1485 struct ethtool_eee edata;
1486
1487 if (!dev->ethtool_ops->set_eee)
1488 return -EOPNOTSUPP;
1489
1490 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1491 return -EFAULT;
1492
1493 return dev->ethtool_ops->set_eee(dev, &edata);
1494}
1495
1da177e4
LT		 1496static int ethtool_nway_reset(struct net_device *dev)
1497{
1498 if (!dev->ethtool_ops->nway_reset)
1499 return -EOPNOTSUPP;
1500
1501 return dev->ethtool_ops->nway_reset(dev);
1502}
1503
e596e6e4
BH		 1504static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1505{
1506 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1507
1508 if (!dev->ethtool_ops->get_link)
1509 return -EOPNOTSUPP;
1510
1511 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1512
1513 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1514 return -EFAULT;
1515 return 0;
1516}
1517
081d094e
BH		 1518static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1519 int (*getter)(struct net_device *,
1520 struct ethtool_eeprom *, u8 *),
1521 u32 total_len)
1da177e4
LT		 1522{
1523 struct ethtool_eeprom eeprom;
b131dd5d
MSB		 1524 void __user *userbuf = useraddr + sizeof(eeprom);
1525 u32 bytes_remaining;
1da177e4 1526 u8 *data;
b131dd5d 1527 int ret = 0;
1da177e4 1528
1da177e4
LT		 1529 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1530 return -EFAULT;
1531
1532 /* Check for wrap and zero */
1533 if (eeprom.offset + eeprom.len <= eeprom.offset)
1534 return -EINVAL;
1535
1536 /* Check for exceeding total eeprom len */
081d094e 1537 if (eeprom.offset + eeprom.len > total_len)
1da177e4
LT		 1538 return -EINVAL;
1539
b131dd5d 1540 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1541 if (!data)
1542 return -ENOMEM;
1543
b131dd5d
MSB		 1544 bytes_remaining = eeprom.len;
1545 while (bytes_remaining > 0) {
1546 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1547
081d094e 1548 ret = getter(dev, &eeprom, data);
b131dd5d
MSB		 1549 if (ret)
1550 break;
1551 if (copy_to_user(userbuf, data, eeprom.len)) {
1552 ret = -EFAULT;
1553 break;
1554 }
1555 userbuf += eeprom.len;
1556 eeprom.offset += eeprom.len;
1557 bytes_remaining -= eeprom.len;
1558 }
1da177e4 1559
c5835df9
MSB		 1560 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1561 eeprom.offset -= eeprom.len;
1562 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1563 ret = -EFAULT;
1564
1da177e4
LT		 1565 kfree(data);
1566 return ret;
1567}
1568
081d094e
BH		 1569static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1570{
1571 const struct ethtool_ops *ops = dev->ethtool_ops;
1572
e0fb6fb6
GR		 1573 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1574 !ops->get_eeprom_len(dev))
081d094e
BH		 1575 return -EOPNOTSUPP;
1576
1577 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1578 ops->get_eeprom_len(dev));
1579}
1580
1da177e4
LT		 1581static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1582{
1583 struct ethtool_eeprom eeprom;
76fd8593 1584 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 1585 void __user *userbuf = useraddr + sizeof(eeprom);
1586 u32 bytes_remaining;
1da177e4 1587 u8 *data;
b131dd5d 1588 int ret = 0;
1da177e4 1589
e0fb6fb6
GR		 1590 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1591 !ops->get_eeprom_len(dev))
1da177e4
LT		 1592 return -EOPNOTSUPP;
1593
1594 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1595 return -EFAULT;
1596
1597 /* Check for wrap and zero */
1598 if (eeprom.offset + eeprom.len <= eeprom.offset)
1599 return -EINVAL;
1600
1601 /* Check for exceeding total eeprom len */
1602 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1603 return -EINVAL;
1604
b131dd5d 1605 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1606 if (!data)
1607 return -ENOMEM;
1608
b131dd5d
MSB		 1609 bytes_remaining = eeprom.len;
1610 while (bytes_remaining > 0) {
1611 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1612
1613 if (copy_from_user(data, userbuf, eeprom.len)) {
1614 ret = -EFAULT;
1615 break;
1616 }
1617 ret = ops->set_eeprom(dev, &eeprom, data);
1618 if (ret)
1619 break;
1620 userbuf += eeprom.len;
1621 eeprom.offset += eeprom.len;
1622 bytes_remaining -= eeprom.len;
1623 }
1da177e4 1624
1da177e4
LT		 1625 kfree(data);
1626 return ret;
1627}
1628
97f8aefb 1629static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1630 void __user *useraddr)
1da177e4 1631{
8e557421 1632 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1da177e4
LT		 1633
1634 if (!dev->ethtool_ops->get_coalesce)
1635 return -EOPNOTSUPP;
1636
1637 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1638
1639 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1640 return -EFAULT;
1641 return 0;
1642}
1643
97f8aefb 1644static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1645 void __user *useraddr)
1da177e4
LT		 1646{
1647 struct ethtool_coalesce coalesce;
1648
fa04ae5c 1649 if (!dev->ethtool_ops->set_coalesce)
1da177e4
LT		 1650 return -EOPNOTSUPP;
1651
1652 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1653 return -EFAULT;
1654
1655 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1656}
1657
1658static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1659{
8e557421 1660 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1da177e4
LT		 1661
1662 if (!dev->ethtool_ops->get_ringparam)
1663 return -EOPNOTSUPP;
1664
1665 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1666
1667 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1668 return -EFAULT;
1669 return 0;
1670}
1671
1672static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1673{
1674 struct ethtool_ringparam ringparam;
1675
1676 if (!dev->ethtool_ops->set_ringparam)
1677 return -EOPNOTSUPP;
1678
1679 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1680 return -EFAULT;
1681
1682 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1683}
1684
8b5933c3 1685static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1686 void __user *useraddr)
1687{
1688 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1689
1690 if (!dev->ethtool_ops->get_channels)
1691 return -EOPNOTSUPP;
1692
1693 dev->ethtool_ops->get_channels(dev, &channels);
1694
1695 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1696 return -EFAULT;
1697 return 0;
1698}
1699
1700static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1701 void __user *useraddr)
1702{
8bf36862 1703 struct ethtool_channels channels, max;
d4ab4286 1704 u32 max_rx_in_use = 0;
8b5933c3 1705
8bf36862 1706 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
8b5933c3 1707 return -EOPNOTSUPP;
1708
1709 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1710 return -EFAULT;
1711
8bf36862
KJ		 1712 dev->ethtool_ops->get_channels(dev, &max);
1713
1714 /* ensure new counts are within the maximums */
1715 if ((channels.rx_count > max.max_rx) ||
1716 (channels.tx_count > max.max_tx) ||
1717 (channels.combined_count > max.max_combined) ||
1718 (channels.other_count > max.max_other))
1719 return -EINVAL;
1720
d4ab4286
KJ		 1721 /* ensure the new Rx count fits within the configured Rx flow
1722 * indirection table settings */
1723 if (netif_is_rxfh_configured(dev) &&
1724 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1725 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1726 return -EINVAL;
1727
8b5933c3 1728 return dev->ethtool_ops->set_channels(dev, &channels);
1729}
1730
1da177e4
LT		 1731static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1732{
1733 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1734
1735 if (!dev->ethtool_ops->get_pauseparam)
1736 return -EOPNOTSUPP;
1737
1738 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1739
1740 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1741 return -EFAULT;
1742 return 0;
1743}
1744
1745static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1746{
1747 struct ethtool_pauseparam pauseparam;
1748
e1b90c41 1749 if (!dev->ethtool_ops->set_pauseparam)
1da177e4
LT		 1750 return -EOPNOTSUPP;
1751
1752 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1753 return -EFAULT;
1754
1755 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1756}
1757
1da177e4
LT		 1758static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1759{
1760 struct ethtool_test test;
76fd8593 1761 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1762 u64 *data;
ff03d49f 1763 int ret, test_len;
1da177e4 1764
a9828ec6 1765 if (!ops->self_test || !ops->get_sset_count)
1da177e4
LT		 1766 return -EOPNOTSUPP;
1767
a9828ec6 1768 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
ff03d49f
JG		 1769 if (test_len < 0)
1770 return test_len;
1771 WARN_ON(test_len == 0);
1772
1da177e4
LT		 1773 if (copy_from_user(&test, useraddr, sizeof(test)))
1774 return -EFAULT;
1775
ff03d49f
JG		 1776 test.len = test_len;
1777 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1da177e4
LT		 1778 if (!data)
1779 return -ENOMEM;
1780
1781 ops->self_test(dev, &test, data);
1782
1783 ret = -EFAULT;
1784 if (copy_to_user(useraddr, &test, sizeof(test)))
1785 goto out;
1786 useraddr += sizeof(test);
1787 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1788 goto out;
1789 ret = 0;
1790
1791 out:
1792 kfree(data);
1793 return ret;
1794}
1795
1796static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1797{
1798 struct ethtool_gstrings gstrings;
1da177e4
LT		 1799 u8 *data;
1800 int ret;
1801
1da177e4
LT		 1802 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1803 return -EFAULT;
1804
340ae165 1805 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
a9828ec6
BH		 1806 if (ret < 0)
1807 return ret;
1808
1809 gstrings.len = ret;
1da177e4 1810
077cb37f 1811 data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
1da177e4
LT		 1812 if (!data)
1813 return -ENOMEM;
1814
340ae165 1815 __ethtool_get_strings(dev, gstrings.string_set, data);
1da177e4
LT		 1816
1817 ret = -EFAULT;
1818 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1819 goto out;
1820 useraddr += sizeof(gstrings);
1821 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1822 goto out;
1823 ret = 0;
1824
340ae165 1825out:
1da177e4
LT		 1826 kfree(data);
1827 return ret;
1828}
1829
1830static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1831{
1832 struct ethtool_value id;
68f512f2 1833 static bool busy;
c03a14e8 1834 const struct ethtool_ops *ops = dev->ethtool_ops;
68f512f2 1835 int rc;
1da177e4 1836
c03a14e8 1837 if (!ops->set_phys_id)
1da177e4
LT		 1838 return -EOPNOTSUPP;
1839
68f512f2
BH		 1840 if (busy)
1841 return -EBUSY;
1842
1da177e4
LT		 1843 if (copy_from_user(&id, useraddr, sizeof(id)))
1844 return -EFAULT;
1845
c03a14e8 1846 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
fce55922 1847 if (rc < 0)
68f512f2
BH		 1848 return rc;
1849
1850 /* Drop the RTNL lock while waiting, but prevent reentry or
1851 * removal of the device.
1852 */
1853 busy = true;
1854 dev_hold(dev);
1855 rtnl_unlock();
1856
1857 if (rc == 0) {
1858 /* Driver will handle this itself */
1859 schedule_timeout_interruptible(
143780c6 1860 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
68f512f2 1861 } else {
fce55922
AB		 1862 /* Driver expects to be called at twice the frequency in rc */
1863 int n = rc * 2, i, interval = HZ / n;
1864
1865 /* Count down seconds */
68f512f2 1866 do {
fce55922
AB		 1867 /* Count down iterations per second */
1868 i = n;
1869 do {
1870 rtnl_lock();
c03a14e8 1871 rc = ops->set_phys_id(dev,
fce55922
AB		 1872 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1873 rtnl_unlock();
1874 if (rc)
1875 break;
1876 schedule_timeout_interruptible(interval);
1877 } while (!signal_pending(current) && --i != 0);
68f512f2
BH		 1878 } while (!signal_pending(current) &&
1879 (id.data == 0 || --id.data != 0));
1880 }
1881
1882 rtnl_lock();
1883 dev_put(dev);
1884 busy = false;
1885
c03a14e8 1886 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
68f512f2 1887 return rc;
1da177e4
LT		 1888}
1889
1890static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1891{
1892 struct ethtool_stats stats;
76fd8593 1893 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1894 u64 *data;
ff03d49f 1895 int ret, n_stats;
1da177e4 1896
a9828ec6 1897 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1da177e4
LT		 1898 return -EOPNOTSUPP;
1899
a9828ec6 1900 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
ff03d49f
JG		 1901 if (n_stats < 0)
1902 return n_stats;
1903 WARN_ON(n_stats == 0);
1904
1da177e4
LT		 1905 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1906 return -EFAULT;
1907
ff03d49f
JG		 1908 stats.n_stats = n_stats;
1909 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1da177e4
LT		 1910 if (!data)
1911 return -ENOMEM;
1912
1913 ops->get_ethtool_stats(dev, &stats, data);
1914
1915 ret = -EFAULT;
1916 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1917 goto out;
1918 useraddr += sizeof(stats);
1919 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1920 goto out;
1921 ret = 0;
1922
1923 out:
1924 kfree(data);
1925 return ret;
1926}
1927
f3a40945
AL		 1928static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1929{
1930 struct ethtool_stats stats;
1931 struct phy_device *phydev = dev->phydev;
1932 u64 *data;
1933 int ret, n_stats;
1934
1935 if (!phydev)
1936 return -EOPNOTSUPP;
1937
1938 n_stats = phy_get_sset_count(phydev);
1939
1940 if (n_stats < 0)
1941 return n_stats;
1942 WARN_ON(n_stats == 0);
1943
1944 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1945 return -EFAULT;
1946
1947 stats.n_stats = n_stats;
1948 data = kmalloc_array(n_stats, sizeof(u64), GFP_USER);
1949 if (!data)
1950 return -ENOMEM;
1951
1952 mutex_lock(&phydev->lock);
1953 phydev->drv->get_stats(phydev, &stats, data);
1954 mutex_unlock(&phydev->lock);
1955
1956 ret = -EFAULT;
1957 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1958 goto out;
1959 useraddr += sizeof(stats);
1960 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1961 goto out;
1962 ret = 0;
1963
1964 out:
1965 kfree(data);
1966 return ret;
1967}
1968
0bf0519d 1969static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
a6f9a705
JW		 1970{
1971 struct ethtool_perm_addr epaddr;
a6f9a705 1972
313674af 1973 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
a6f9a705
JW		 1974 return -EFAULT;
1975
313674af
MW		 1976 if (epaddr.size < dev->addr_len)
1977 return -ETOOSMALL;
1978 epaddr.size = dev->addr_len;
a6f9a705 1979
a6f9a705 1980 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
313674af 1981 return -EFAULT;
a6f9a705 1982 useraddr += sizeof(epaddr);
313674af
MW		 1983 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1984 return -EFAULT;
1985 return 0;
a6f9a705
JW		 1986}
1987
13c99b24
JG		 1988static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1989 u32 cmd, u32 (*actor)(struct net_device *))
3ae7c0b2 1990{
8e557421 1991 struct ethtool_value edata = { .cmd = cmd };
3ae7c0b2 1992
13c99b24 1993 if (!actor)
3ae7c0b2
JG		 1994 return -EOPNOTSUPP;
1995
13c99b24 1996 edata.data = actor(dev);
3ae7c0b2
JG		 1997
1998 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1999 return -EFAULT;
2000 return 0;
2001}
2002
13c99b24
JG		 2003static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2004 void (*actor)(struct net_device *, u32))
3ae7c0b2
JG		 2005{
2006 struct ethtool_value edata;
2007
13c99b24 2008 if (!actor)
3ae7c0b2
JG		 2009 return -EOPNOTSUPP;
2010
2011 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2012 return -EFAULT;
2013
13c99b24 2014 actor(dev, edata.data);
339bf024
JG		 2015 return 0;
2016}
2017
13c99b24
JG		 2018static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2019 int (*actor)(struct net_device *, u32))
339bf024
JG		 2020{
2021 struct ethtool_value edata;
2022
13c99b24 2023 if (!actor)
339bf024
JG		 2024 return -EOPNOTSUPP;
2025
2026 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2027 return -EFAULT;
2028
13c99b24 2029 return actor(dev, edata.data);
339bf024
JG		 2030}
2031
97f8aefb 2032static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2033 char __user *useraddr)
05c6a8d7
AK		 2034{
2035 struct ethtool_flash efl;
2036
2037 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2038 return -EFAULT;
2039
2040 if (!dev->ethtool_ops->flash_device)
2041 return -EOPNOTSUPP;
2042
786f5281
BH		 2043 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2044
05c6a8d7
AK		 2045 return dev->ethtool_ops->flash_device(dev, &efl);
2046}
2047
29dd54b7
AC		 2048static int ethtool_set_dump(struct net_device *dev,
2049 void __user *useraddr)
2050{
2051 struct ethtool_dump dump;
2052
2053 if (!dev->ethtool_ops->set_dump)
2054 return -EOPNOTSUPP;
2055
2056 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2057 return -EFAULT;
2058
2059 return dev->ethtool_ops->set_dump(dev, &dump);
2060}
2061
2062static int ethtool_get_dump_flag(struct net_device *dev,
2063 void __user *useraddr)
2064{
2065 int ret;
2066 struct ethtool_dump dump;
2067 const struct ethtool_ops *ops = dev->ethtool_ops;
2068
c03a14e8 2069 if (!ops->get_dump_flag)
29dd54b7
AC		 2070 return -EOPNOTSUPP;
2071
2072 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2073 return -EFAULT;
2074
2075 ret = ops->get_dump_flag(dev, &dump);
2076 if (ret)
2077 return ret;
2078
2079 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2080 return -EFAULT;
2081 return 0;
2082}
2083
2084static int ethtool_get_dump_data(struct net_device *dev,
2085 void __user *useraddr)
2086{
2087 int ret;
2088 __u32 len;
2089 struct ethtool_dump dump, tmp;
2090 const struct ethtool_ops *ops = dev->ethtool_ops;
2091 void *data = NULL;
2092
c03a14e8 2093 if (!ops->get_dump_data || !ops->get_dump_flag)
29dd54b7
AC		 2094 return -EOPNOTSUPP;
2095
2096 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2097 return -EFAULT;
2098
2099 memset(&tmp, 0, sizeof(tmp));
2100 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2101 ret = ops->get_dump_flag(dev, &tmp);
2102 if (ret)
2103 return ret;
2104
c590b5e2 2105 len = min(tmp.len, dump.len);
29dd54b7
AC		 2106 if (!len)
2107 return -EFAULT;
2108
c590b5e2
MS		 2109 /* Don't ever let the driver think there's more space available
2110 * than it requested with .get_dump_flag().
2111 */
2112 dump.len = len;
2113
2114 /* Always allocate enough space to hold the whole thing so that the
2115 * driver does not need to check the length and bother with partial
2116 * dumping.
2117 */
29dd54b7
AC		 2118 data = vzalloc(tmp.len);
2119 if (!data)
2120 return -ENOMEM;
2121 ret = ops->get_dump_data(dev, &dump, data);
2122 if (ret)
2123 goto out;
2124
c590b5e2
MS		 2125 /* There are two sane possibilities:
2126 * 1. The driver's .get_dump_data() does not touch dump.len.
2127 * 2. Or it may set dump.len to how much it really writes, which
2128 * should be tmp.len (or len if it can do a partial dump).
2129 * In any case respond to userspace with the actual length of data
2130 * it's receiving.
2131 */
2132 WARN_ON(dump.len != len && dump.len != tmp.len);
2133 dump.len = len;
2134
29dd54b7
AC		 2135 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2136 ret = -EFAULT;
2137 goto out;
2138 }
2139 useraddr += offsetof(struct ethtool_dump, data);
2140 if (copy_to_user(useraddr, data, len))
2141 ret = -EFAULT;
2142out:
2143 vfree(data);
2144 return ret;
2145}
2146
c8f3a8c3
RC		 2147static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2148{
2149 int err = 0;
2150 struct ethtool_ts_info info;
2151 const struct ethtool_ops *ops = dev->ethtool_ops;
2152 struct phy_device *phydev = dev->phydev;
2153
2154 memset(&info, 0, sizeof(info));
2155 info.cmd = ETHTOOL_GET_TS_INFO;
2156
2157 if (phydev && phydev->drv && phydev->drv->ts_info) {
c8f3a8c3 2158 err = phydev->drv->ts_info(phydev, &info);
c03a14e8 2159 } else if (ops->get_ts_info) {
c8f3a8c3 2160 err = ops->get_ts_info(dev, &info);
c8f3a8c3
RC		 2161 } else {
2162 info.so_timestamping =
2163 SOF_TIMESTAMPING_RX_SOFTWARE |
2164 SOF_TIMESTAMPING_SOFTWARE;
2165 info.phc_index = -1;
2166 }
2167
2168 if (err)
2169 return err;
2170
2171 if (copy_to_user(useraddr, &info, sizeof(info)))
2172 err = -EFAULT;
2173
2174 return err;
2175}
2176
2f438366
ES		 2177static int __ethtool_get_module_info(struct net_device *dev,
2178 struct ethtool_modinfo *modinfo)
2179{
2180 const struct ethtool_ops *ops = dev->ethtool_ops;
2181 struct phy_device *phydev = dev->phydev;
2182
2183 if (phydev && phydev->drv && phydev->drv->module_info)
2184 return phydev->drv->module_info(phydev, modinfo);
2185
2186 if (ops->get_module_info)
2187 return ops->get_module_info(dev, modinfo);
2188
2189 return -EOPNOTSUPP;
2190}
2191
41c3cb6d
SH		 2192static int ethtool_get_module_info(struct net_device *dev,
2193 void __user *useraddr)
2194{
2195 int ret;
2196 struct ethtool_modinfo modinfo;
41c3cb6d
SH		 2197
2198 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2199 return -EFAULT;
2200
2f438366 2201 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2202 if (ret)
2203 return ret;
2204
2205 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2206 return -EFAULT;
2207
2208 return 0;
2209}
2210
2f438366
ES		 2211static int __ethtool_get_module_eeprom(struct net_device *dev,
2212 struct ethtool_eeprom *ee, u8 *data)
2213{
2214 const struct ethtool_ops *ops = dev->ethtool_ops;
2215 struct phy_device *phydev = dev->phydev;
2216
2217 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2218 return phydev->drv->module_eeprom(phydev, ee, data);
2219
2220 if (ops->get_module_eeprom)
2221 return ops->get_module_eeprom(dev, ee, data);
2222
2223 return -EOPNOTSUPP;
2224}
2225
41c3cb6d
SH		 2226static int ethtool_get_module_eeprom(struct net_device *dev,
2227 void __user *useraddr)
2228{
2229 int ret;
2230 struct ethtool_modinfo modinfo;
41c3cb6d 2231
2f438366 2232 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2233 if (ret)
2234 return ret;
2235
2f438366
ES		 2236 return ethtool_get_any_eeprom(dev, useraddr,
2237 __ethtool_get_module_eeprom,
41c3cb6d
SH		 2238 modinfo.eeprom_len);
2239}
2240
f0db9b07
GV		 2241static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2242{
2243 switch (tuna->id) {
2244 case ETHTOOL_RX_COPYBREAK:
1255a505 2245 case ETHTOOL_TX_COPYBREAK:
f0db9b07
GV		 2246 if (tuna->len != sizeof(u32) ||
2247 tuna->type_id != ETHTOOL_TUNABLE_U32)
2248 return -EINVAL;
2249 break;
2250 default:
2251 return -EINVAL;
2252 }
2253
2254 return 0;
2255}
2256
2257static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2258{
2259 int ret;
2260 struct ethtool_tunable tuna;
2261 const struct ethtool_ops *ops = dev->ethtool_ops;
2262 void *data;
2263
2264 if (!ops->get_tunable)
2265 return -EOPNOTSUPP;
2266 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2267 return -EFAULT;
2268 ret = ethtool_tunable_valid(&tuna);
2269 if (ret)
2270 return ret;
2271 data = kmalloc(tuna.len, GFP_USER);
2272 if (!data)
2273 return -ENOMEM;
2274 ret = ops->get_tunable(dev, &tuna, data);
2275 if (ret)
2276 goto out;
2277 useraddr += sizeof(tuna);
2278 ret = -EFAULT;
2279 if (copy_to_user(useraddr, data, tuna.len))
2280 goto out;
2281 ret = 0;
2282
2283out:
2284 kfree(data);
2285 return ret;
2286}
2287
2288static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2289{
2290 int ret;
2291 struct ethtool_tunable tuna;
2292 const struct ethtool_ops *ops = dev->ethtool_ops;
2293 void *data;
2294
2295 if (!ops->set_tunable)
2296 return -EOPNOTSUPP;
2297 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2298 return -EFAULT;
2299 ret = ethtool_tunable_valid(&tuna);
2300 if (ret)
2301 return ret;
2302 data = kmalloc(tuna.len, GFP_USER);
2303 if (!data)
2304 return -ENOMEM;
2305 useraddr += sizeof(tuna);
2306 ret = -EFAULT;
2307 if (copy_from_user(data, useraddr, tuna.len))
2308 goto out;
2309 ret = ops->set_tunable(dev, &tuna, data);
2310
2311out:
2312 kfree(data);
2313 return ret;
2314}
2315
421797b1
KL		 2316static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2317 void __user *useraddr,
2318 struct ethtool_per_queue_op *per_queue_opt)
2319{
2320 u32 bit;
2321 int ret;
2322 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2323
2324 if (!dev->ethtool_ops->get_per_queue_coalesce)
2325 return -EOPNOTSUPP;
2326
2327 useraddr += sizeof(*per_queue_opt);
2328
2329 bitmap_from_u32array(queue_mask,
2330 MAX_NUM_QUEUE,
2331 per_queue_opt->queue_mask,
2332 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2333
2334 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2335 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2336
2337 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2338 if (ret != 0)
2339 return ret;
2340 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2341 return -EFAULT;
2342 useraddr += sizeof(coalesce);
2343 }
2344
2345 return 0;
2346}
2347
f38d138a
KL		 2348static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2349 void __user *useraddr,
2350 struct ethtool_per_queue_op *per_queue_opt)
2351{
2352 u32 bit;
2353 int i, ret = 0;
2354 int n_queue;
2355 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2356 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2357
2358 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2359 (!dev->ethtool_ops->get_per_queue_coalesce))
2360 return -EOPNOTSUPP;
2361
2362 useraddr += sizeof(*per_queue_opt);
2363
2364 bitmap_from_u32array(queue_mask,
2365 MAX_NUM_QUEUE,
2366 per_queue_opt->queue_mask,
2367 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2368 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2369 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2370 if (!backup)
2371 return -ENOMEM;
2372
2373 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2374 struct ethtool_coalesce coalesce;
2375
2376 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2377 if (ret != 0)
2378 goto roll_back;
2379
2380 tmp++;
2381
2382 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2383 ret = -EFAULT;
2384 goto roll_back;
2385 }
2386
2387 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2388 if (ret != 0)
2389 goto roll_back;
2390
2391 useraddr += sizeof(coalesce);
2392 }
2393
2394roll_back:
2395 if (ret != 0) {
2396 tmp = backup;
2397 for_each_set_bit(i, queue_mask, bit) {
2398 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2399 tmp++;
2400 }
2401 }
2402 kfree(backup);
2403
2404 return ret;
2405}
2406
ac2c7ad0
KL		 2407static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2408{
2409 struct ethtool_per_queue_op per_queue_opt;
2410
2411 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2412 return -EFAULT;
2413
2414 switch (per_queue_opt.sub_command) {
421797b1
KL		 2415 case ETHTOOL_GCOALESCE:
2416 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
f38d138a
KL		 2417 case ETHTOOL_SCOALESCE:
2418 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
ac2c7ad0
KL		 2419 default:
2420 return -EOPNOTSUPP;
2421 };
2422}
2423
600fed5e 2424/* The main entry point in this file. Called from net/core/dev_ioctl.c */
1da177e4 2425
881d966b 2426int dev_ethtool(struct net *net, struct ifreq *ifr)
1da177e4 2427{
881d966b 2428 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1da177e4 2429 void __user *useraddr = ifr->ifr_data;
ac2c7ad0 2430 u32 ethcmd, sub_cmd;
1da177e4 2431 int rc;
b29d3145 2432 netdev_features_t old_features;
1da177e4 2433
1da177e4
LT		 2434 if (!dev || !netif_device_present(dev))
2435 return -ENODEV;
2436
97f8aefb 2437 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1da177e4
LT		 2438 return -EFAULT;
2439
ac2c7ad0
KL		 2440 if (ethcmd == ETHTOOL_PERQUEUE) {
2441 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2442 return -EFAULT;
2443 } else {
2444 sub_cmd = ethcmd;
2445 }
75f3123c 2446 /* Allow some commands to be done by anyone */
ac2c7ad0 2447 switch (sub_cmd) {
0fdc100b 2448 case ETHTOOL_GSET:
75f3123c 2449 case ETHTOOL_GDRVINFO:
75f3123c 2450 case ETHTOOL_GMSGLVL:
2da45db2 2451 case ETHTOOL_GLINK:
75f3123c
SH		 2452 case ETHTOOL_GCOALESCE:
2453 case ETHTOOL_GRINGPARAM:
2454 case ETHTOOL_GPAUSEPARAM:
2455 case ETHTOOL_GRXCSUM:
2456 case ETHTOOL_GTXCSUM:
2457 case ETHTOOL_GSG:
f80400a2 2458 case ETHTOOL_GSSET_INFO:
75f3123c 2459 case ETHTOOL_GSTRINGS:
2da45db2 2460 case ETHTOOL_GSTATS:
f3a40945 2461 case ETHTOOL_GPHYSTATS:
75f3123c
SH		 2462 case ETHTOOL_GTSO:
2463 case ETHTOOL_GPERMADDR:
2464 case ETHTOOL_GUFO:
2465 case ETHTOOL_GGSO:
1cab819b 2466 case ETHTOOL_GGRO:
339bf024
JG		 2467 case ETHTOOL_GFLAGS:
2468 case ETHTOOL_GPFLAGS:
0853ad66 2469 case ETHTOOL_GRXFH:
59089d8d
SB		 2470 case ETHTOOL_GRXRINGS:
2471 case ETHTOOL_GRXCLSRLCNT:
2472 case ETHTOOL_GRXCLSRULE:
2473 case ETHTOOL_GRXCLSRLALL:
2da45db2 2474 case ETHTOOL_GRXFHINDIR:
3de0b592 2475 case ETHTOOL_GRSSH:
5455c699 2476 case ETHTOOL_GFEATURES:
2da45db2 2477 case ETHTOOL_GCHANNELS:
c8f3a8c3 2478 case ETHTOOL_GET_TS_INFO:
2da45db2 2479 case ETHTOOL_GEEE:
f0db9b07 2480 case ETHTOOL_GTUNABLE:
75f3123c
SH		 2481 break;
2482 default:
5e1fccc0 2483 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
75f3123c
SH		 2484 return -EPERM;
2485 }
2486
97f8aefb 2487 if (dev->ethtool_ops->begin) {
2488 rc = dev->ethtool_ops->begin(dev);
2489 if (rc < 0)
1da177e4 2490 return rc;
97f8aefb 2491 }
d8a33ac4
SH		 2492 old_features = dev->features;
2493
1da177e4
LT		 2494 switch (ethcmd) {
2495 case ETHTOOL_GSET:
2496 rc = ethtool_get_settings(dev, useraddr);
2497 break;
2498 case ETHTOOL_SSET:
2499 rc = ethtool_set_settings(dev, useraddr);
2500 break;
2501 case ETHTOOL_GDRVINFO:
2502 rc = ethtool_get_drvinfo(dev, useraddr);
1da177e4
LT		 2503 break;
2504 case ETHTOOL_GREGS:
2505 rc = ethtool_get_regs(dev, useraddr);
2506 break;
2507 case ETHTOOL_GWOL:
2508 rc = ethtool_get_wol(dev, useraddr);
2509 break;
2510 case ETHTOOL_SWOL:
2511 rc = ethtool_set_wol(dev, useraddr);
2512 break;
2513 case ETHTOOL_GMSGLVL:
13c99b24
JG		 2514 rc = ethtool_get_value(dev, useraddr, ethcmd,
2515 dev->ethtool_ops->get_msglevel);
1da177e4
LT		 2516 break;
2517 case ETHTOOL_SMSGLVL:
13c99b24
JG		 2518 rc = ethtool_set_value_void(dev, useraddr,
2519 dev->ethtool_ops->set_msglevel);
1da177e4 2520 break;
80f12ecc
YM		 2521 case ETHTOOL_GEEE:
2522 rc = ethtool_get_eee(dev, useraddr);
2523 break;
2524 case ETHTOOL_SEEE:
2525 rc = ethtool_set_eee(dev, useraddr);
2526 break;
1da177e4
LT		 2527 case ETHTOOL_NWAY_RST:
2528 rc = ethtool_nway_reset(dev);
2529 break;
2530 case ETHTOOL_GLINK:
e596e6e4 2531 rc = ethtool_get_link(dev, useraddr);
1da177e4
LT		 2532 break;
2533 case ETHTOOL_GEEPROM:
2534 rc = ethtool_get_eeprom(dev, useraddr);
2535 break;
2536 case ETHTOOL_SEEPROM:
2537 rc = ethtool_set_eeprom(dev, useraddr);
2538 break;
2539 case ETHTOOL_GCOALESCE:
2540 rc = ethtool_get_coalesce(dev, useraddr);
2541 break;
2542 case ETHTOOL_SCOALESCE:
2543 rc = ethtool_set_coalesce(dev, useraddr);
2544 break;
2545 case ETHTOOL_GRINGPARAM:
2546 rc = ethtool_get_ringparam(dev, useraddr);
2547 break;
2548 case ETHTOOL_SRINGPARAM:
2549 rc = ethtool_set_ringparam(dev, useraddr);
2550 break;
2551 case ETHTOOL_GPAUSEPARAM:
2552 rc = ethtool_get_pauseparam(dev, useraddr);
2553 break;
2554 case ETHTOOL_SPAUSEPARAM:
2555 rc = ethtool_set_pauseparam(dev, useraddr);
2556 break;
1da177e4
LT		 2557 case ETHTOOL_TEST:
2558 rc = ethtool_self_test(dev, useraddr);
2559 break;
2560 case ETHTOOL_GSTRINGS:
2561 rc = ethtool_get_strings(dev, useraddr);
2562 break;
2563 case ETHTOOL_PHYS_ID:
2564 rc = ethtool_phys_id(dev, useraddr);
2565 break;
2566 case ETHTOOL_GSTATS:
2567 rc = ethtool_get_stats(dev, useraddr);
2568 break;
a6f9a705
JW		 2569 case ETHTOOL_GPERMADDR:
2570 rc = ethtool_get_perm_addr(dev, useraddr);
2571 break;
3ae7c0b2 2572 case ETHTOOL_GFLAGS:
13c99b24 2573 rc = ethtool_get_value(dev, useraddr, ethcmd,
bc5787c6 2574 __ethtool_get_flags);
3ae7c0b2
JG		 2575 break;
2576 case ETHTOOL_SFLAGS:
da8ac86c 2577 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3ae7c0b2 2578 break;
339bf024 2579 case ETHTOOL_GPFLAGS:
13c99b24
JG		 2580 rc = ethtool_get_value(dev, useraddr, ethcmd,
2581 dev->ethtool_ops->get_priv_flags);
339bf024
JG		 2582 break;
2583 case ETHTOOL_SPFLAGS:
13c99b24
JG		 2584 rc = ethtool_set_value(dev, useraddr,
2585 dev->ethtool_ops->set_priv_flags);
339bf024 2586 break;
0853ad66 2587 case ETHTOOL_GRXFH:
59089d8d
SB		 2588 case ETHTOOL_GRXRINGS:
2589 case ETHTOOL_GRXCLSRLCNT:
2590 case ETHTOOL_GRXCLSRULE:
2591 case ETHTOOL_GRXCLSRLALL:
bf988435 2592 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
0853ad66
SB		 2593 break;
2594 case ETHTOOL_SRXFH:
59089d8d
SB		 2595 case ETHTOOL_SRXCLSRLDEL:
2596 case ETHTOOL_SRXCLSRLINS:
bf988435 2597 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
0853ad66 2598 break;
05c6a8d7
AK		 2599 case ETHTOOL_FLASHDEV:
2600 rc = ethtool_flash_device(dev, useraddr);
2601 break;
d73d3a8c
BH		 2602 case ETHTOOL_RESET:
2603 rc = ethtool_reset(dev, useraddr);
2604 break;
723b2f57
JG		 2605 case ETHTOOL_GSSET_INFO:
2606 rc = ethtool_get_sset_info(dev, useraddr);
2607 break;
a5b6ee29
BH		 2608 case ETHTOOL_GRXFHINDIR:
2609 rc = ethtool_get_rxfh_indir(dev, useraddr);
2610 break;
2611 case ETHTOOL_SRXFHINDIR:
2612 rc = ethtool_set_rxfh_indir(dev, useraddr);
2613 break;
3de0b592
VD		 2614 case ETHTOOL_GRSSH:
2615 rc = ethtool_get_rxfh(dev, useraddr);
2616 break;
2617 case ETHTOOL_SRSSH:
2618 rc = ethtool_set_rxfh(dev, useraddr);
2619 break;
5455c699
MM		 2620 case ETHTOOL_GFEATURES:
2621 rc = ethtool_get_features(dev, useraddr);
2622 break;
2623 case ETHTOOL_SFEATURES:
2624 rc = ethtool_set_features(dev, useraddr);
2625 break;
0a417704 2626 case ETHTOOL_GTXCSUM:
e83d360d 2627 case ETHTOOL_GRXCSUM:
0a417704
MM		 2628 case ETHTOOL_GSG:
2629 case ETHTOOL_GTSO:
2630 case ETHTOOL_GUFO:
2631 case ETHTOOL_GGSO:
2632 case ETHTOOL_GGRO:
2633 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2634 break;
2635 case ETHTOOL_STXCSUM:
e83d360d 2636 case ETHTOOL_SRXCSUM:
0a417704
MM		 2637 case ETHTOOL_SSG:
2638 case ETHTOOL_STSO:
2639 case ETHTOOL_SUFO:
2640 case ETHTOOL_SGSO:
2641 case ETHTOOL_SGRO:
2642 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2643 break;
8b5933c3 2644 case ETHTOOL_GCHANNELS:
2645 rc = ethtool_get_channels(dev, useraddr);
2646 break;
2647 case ETHTOOL_SCHANNELS:
2648 rc = ethtool_set_channels(dev, useraddr);
2649 break;
29dd54b7
AC		 2650 case ETHTOOL_SET_DUMP:
2651 rc = ethtool_set_dump(dev, useraddr);
2652 break;
2653 case ETHTOOL_GET_DUMP_FLAG:
2654 rc = ethtool_get_dump_flag(dev, useraddr);
2655 break;
2656 case ETHTOOL_GET_DUMP_DATA:
2657 rc = ethtool_get_dump_data(dev, useraddr);
2658 break;
c8f3a8c3
RC		 2659 case ETHTOOL_GET_TS_INFO:
2660 rc = ethtool_get_ts_info(dev, useraddr);
2661 break;
41c3cb6d
SH		 2662 case ETHTOOL_GMODULEINFO:
2663 rc = ethtool_get_module_info(dev, useraddr);
2664 break;
2665 case ETHTOOL_GMODULEEEPROM:
2666 rc = ethtool_get_module_eeprom(dev, useraddr);
2667 break;
f0db9b07
GV		 2668 case ETHTOOL_GTUNABLE:
2669 rc = ethtool_get_tunable(dev, useraddr);
2670 break;
2671 case ETHTOOL_STUNABLE:
2672 rc = ethtool_set_tunable(dev, useraddr);
2673 break;
f3a40945
AL		 2674 case ETHTOOL_GPHYSTATS:
2675 rc = ethtool_get_phy_stats(dev, useraddr);
2676 break;
ac2c7ad0
KL		 2677 case ETHTOOL_PERQUEUE:
2678 rc = ethtool_set_per_queue(dev, useraddr);
2679 break;
3f1ac7a7
DD		 2680 case ETHTOOL_GLINKSETTINGS:
2681 rc = ethtool_get_link_ksettings(dev, useraddr);
2682 break;
2683 case ETHTOOL_SLINKSETTINGS:
2684 rc = ethtool_set_link_ksettings(dev, useraddr);
2685 break;
1da177e4 2686 default:
61a44b9c 2687 rc = -EOPNOTSUPP;
1da177e4 2688 }
4ec93edb 2689
e71a4783 2690 if (dev->ethtool_ops->complete)
1da177e4 2691 dev->ethtool_ops->complete(dev);
d8a33ac4
SH		 2692
2693 if (old_features != dev->features)
2694 netdev_features_change(dev);
2695
1da177e4 2696 return rc;
1da177e4 2697}
Linux 6.x block layer and io_uring tree(s)