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GSO: Support partial segmentation offload
[deliverable/linux.git] / net / core / ethtool.c
CommitLineData
1da177e4
LT		 1/*
2 * net/core/ethtool.c - Ethtool ioctl handler
3 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
4 *
5 * This file is where we call all the ethtool_ops commands to get
61a44b9c 6 * the information ethtool needs.
1da177e4 7 *
61a44b9c
MW		 8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
1da177e4
LT		 12 */
13
14#include <linux/module.h>
15#include <linux/types.h>
4fc268d2 16#include <linux/capability.h>
1da177e4
LT		 17#include <linux/errno.h>
18#include <linux/ethtool.h>
19#include <linux/netdevice.h>
c8f3a8c3
RC		 20#include <linux/net_tstamp.h>
21#include <linux/phy.h>
d17792eb 22#include <linux/bitops.h>
97f8aefb 23#include <linux/uaccess.h>
73da16c2 24#include <linux/vmalloc.h>
5a0e3ad6 25#include <linux/slab.h>
68f512f2
BH		 26#include <linux/rtnetlink.h>
27#include <linux/sched.h>
960fb622 28#include <linux/net.h>
1da177e4 29
4ec93edb 30/*
1da177e4
LT		 31 * Some useful ethtool_ops methods that're device independent.
32 * If we find that all drivers want to do the same thing here,
33 * we can turn these into dev_() function calls.
34 */
35
36u32 ethtool_op_get_link(struct net_device *dev)
37{
38 return netif_carrier_ok(dev) ? 1 : 0;
39}
97f8aefb 40EXPORT_SYMBOL(ethtool_op_get_link);
1da177e4 41
02eacbd0
RC		 42int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
43{
44 info->so_timestamping =
45 SOF_TIMESTAMPING_TX_SOFTWARE |
46 SOF_TIMESTAMPING_RX_SOFTWARE |
47 SOF_TIMESTAMPING_SOFTWARE;
48 info->phc_index = -1;
49 return 0;
50}
51EXPORT_SYMBOL(ethtool_op_get_ts_info);
52
1da177e4
LT		 53/* Handlers for each ethtool command */
54
475414f6 55#define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
5455c699 56
9d921549
MM		 57static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
58 [NETIF_F_SG_BIT] = "tx-scatter-gather",
59 [NETIF_F_IP_CSUM_BIT] = "tx-checksum-ipv4",
9d921549
MM		 60 [NETIF_F_HW_CSUM_BIT] = "tx-checksum-ip-generic",
61 [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6",
62 [NETIF_F_HIGHDMA_BIT] = "highdma",
63 [NETIF_F_FRAGLIST_BIT] = "tx-scatter-gather-fraglist",
788dfcac 64 [NETIF_F_HW_VLAN_CTAG_TX_BIT] = "tx-vlan-hw-insert",
9d921549 65
788dfcac
FLVC		 66 [NETIF_F_HW_VLAN_CTAG_RX_BIT] = "rx-vlan-hw-parse",
67 [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
2d6577f1
DM		 68 [NETIF_F_HW_VLAN_STAG_TX_BIT] = "tx-vlan-stag-hw-insert",
69 [NETIF_F_HW_VLAN_STAG_RX_BIT] = "rx-vlan-stag-hw-parse",
70 [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
9d921549
MM		 71 [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged",
72 [NETIF_F_GSO_BIT] = "tx-generic-segmentation",
73 [NETIF_F_LLTX_BIT] = "tx-lockless",
74 [NETIF_F_NETNS_LOCAL_BIT] = "netns-local",
75 [NETIF_F_GRO_BIT] = "rx-gro",
76 [NETIF_F_LRO_BIT] = "rx-lro",
77
78 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation",
79 [NETIF_F_UFO_BIT] = "tx-udp-fragmentation",
80 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
81 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
cbc53e08 82 [NETIF_F_TSO_MANGLEID_BIT] = "tx-tcp-mangleid-segmentation",
9d921549
MM		 83 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
84 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
68c33163 85 [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
518f213d 86 [NETIF_F_GSO_GRE_CSUM_BIT] = "tx-gre-csum-segmentation",
cb32f511 87 [NETIF_F_GSO_IPIP_BIT] = "tx-ipip-segmentation",
61c1db7f 88 [NETIF_F_GSO_SIT_BIT] = "tx-sit-segmentation",
73136267 89 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
518f213d 90 [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
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
3f1ac7a7
DD		 394static void convert_legacy_u32_to_link_mode(unsigned long *dst, u32 legacy_u32)
395{
396 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
397 dst[0] = legacy_u32;
398}
399
400/* return false if src had higher bits set. lower bits always updated. */
401static bool convert_link_mode_to_legacy_u32(u32 *legacy_u32,
402 const unsigned long *src)
403{
404 bool retval = true;
405
406 /* TODO: following test will soon always be true */
407 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
408 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
409
410 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
411 bitmap_fill(ext, 32);
412 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
413 if (bitmap_intersects(ext, src,
414 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
415 /* src mask goes beyond bit 31 */
416 retval = false;
417 }
418 }
419 *legacy_u32 = src[0];
420 return retval;
421}
422
423/* return false if legacy contained non-0 deprecated fields
424 * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
425 */
426static bool
427convert_legacy_settings_to_link_ksettings(
428 struct ethtool_link_ksettings *link_ksettings,
429 const struct ethtool_cmd *legacy_settings)
430{
431 bool retval = true;
432
433 memset(link_ksettings, 0, sizeof(*link_ksettings));
434
435 /* This is used to tell users that driver is still using these
436 * deprecated legacy fields, and they should not use
437 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
438 */
439 if (legacy_settings->transceiver ||
440 legacy_settings->maxtxpkt ||
441 legacy_settings->maxrxpkt)
442 retval = false;
443
444 convert_legacy_u32_to_link_mode(
445 link_ksettings->link_modes.supported,
446 legacy_settings->supported);
447 convert_legacy_u32_to_link_mode(
448 link_ksettings->link_modes.advertising,
449 legacy_settings->advertising);
450 convert_legacy_u32_to_link_mode(
451 link_ksettings->link_modes.lp_advertising,
452 legacy_settings->lp_advertising);
453 link_ksettings->base.speed
454 = ethtool_cmd_speed(legacy_settings);
455 link_ksettings->base.duplex
456 = legacy_settings->duplex;
457 link_ksettings->base.port
458 = legacy_settings->port;
459 link_ksettings->base.phy_address
460 = legacy_settings->phy_address;
461 link_ksettings->base.autoneg
462 = legacy_settings->autoneg;
463 link_ksettings->base.mdio_support
464 = legacy_settings->mdio_support;
465 link_ksettings->base.eth_tp_mdix
466 = legacy_settings->eth_tp_mdix;
467 link_ksettings->base.eth_tp_mdix_ctrl
468 = legacy_settings->eth_tp_mdix_ctrl;
469 return retval;
470}
471
472/* return false if ksettings link modes had higher bits
473 * set. legacy_settings always updated (best effort)
474 */
475static bool
476convert_link_ksettings_to_legacy_settings(
477 struct ethtool_cmd *legacy_settings,
478 const struct ethtool_link_ksettings *link_ksettings)
479{
480 bool retval = true;
481
482 memset(legacy_settings, 0, sizeof(*legacy_settings));
483 /* this also clears the deprecated fields in legacy structure:
484 * __u8 transceiver;
485 * __u32 maxtxpkt;
486 * __u32 maxrxpkt;
487 */
488
489 retval &= convert_link_mode_to_legacy_u32(
490 &legacy_settings->supported,
491 link_ksettings->link_modes.supported);
492 retval &= convert_link_mode_to_legacy_u32(
493 &legacy_settings->advertising,
494 link_ksettings->link_modes.advertising);
495 retval &= convert_link_mode_to_legacy_u32(
496 &legacy_settings->lp_advertising,
497 link_ksettings->link_modes.lp_advertising);
498 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
499 legacy_settings->duplex
500 = link_ksettings->base.duplex;
501 legacy_settings->port
502 = link_ksettings->base.port;
503 legacy_settings->phy_address
504 = link_ksettings->base.phy_address;
505 legacy_settings->autoneg
506 = link_ksettings->base.autoneg;
507 legacy_settings->mdio_support
508 = link_ksettings->base.mdio_support;
509 legacy_settings->eth_tp_mdix
510 = link_ksettings->base.eth_tp_mdix;
511 legacy_settings->eth_tp_mdix_ctrl
512 = link_ksettings->base.eth_tp_mdix_ctrl;
513 return retval;
514}
515
516/* number of 32-bit words to store the user's link mode bitmaps */
517#define __ETHTOOL_LINK_MODE_MASK_NU32 \
518 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
519
520/* layout of the struct passed from/to userland */
521struct ethtool_link_usettings {
522 struct ethtool_link_settings base;
523 struct {
524 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
525 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
526 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
527 } link_modes;
528};
529
530/* Internal kernel helper to query a device ethtool_link_settings.
531 *
532 * Backward compatibility note: for compatibility with legacy drivers
533 * that implement only the ethtool_cmd API, this has to work with both
534 * drivers implementing get_link_ksettings API and drivers
535 * implementing get_settings API. When drivers implement get_settings
536 * and report ethtool_cmd deprecated fields
537 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
538 * because the resulting struct ethtool_link_settings does not report them.
539 */
540int __ethtool_get_link_ksettings(struct net_device *dev,
541 struct ethtool_link_ksettings *link_ksettings)
542{
543 int err;
544 struct ethtool_cmd cmd;
545
546 ASSERT_RTNL();
547
548 if (dev->ethtool_ops->get_link_ksettings) {
549 memset(link_ksettings, 0, sizeof(*link_ksettings));
550 return dev->ethtool_ops->get_link_ksettings(dev,
551 link_ksettings);
552 }
553
554 /* driver doesn't support %ethtool_link_ksettings API. revert to
555 * legacy %ethtool_cmd API, unless it's not supported either.
556 * TODO: remove when ethtool_ops::get_settings disappears internally
557 */
3237fc63
DD		 558 if (!dev->ethtool_ops->get_settings)
559 return -EOPNOTSUPP;
560
561 memset(&cmd, 0, sizeof(cmd));
562 cmd.cmd = ETHTOOL_GSET;
563 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 564 if (err < 0)
565 return err;
566
567 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
568 */
569 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
570 return err;
571}
572EXPORT_SYMBOL(__ethtool_get_link_ksettings);
573
574/* convert ethtool_link_usettings in user space to a kernel internal
575 * ethtool_link_ksettings. return 0 on success, errno on error.
576 */
577static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
578 const void __user *from)
579{
580 struct ethtool_link_usettings link_usettings;
581
582 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
583 return -EFAULT;
584
585 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
586 bitmap_from_u32array(to->link_modes.supported,
587 __ETHTOOL_LINK_MODE_MASK_NBITS,
588 link_usettings.link_modes.supported,
589 __ETHTOOL_LINK_MODE_MASK_NU32);
590 bitmap_from_u32array(to->link_modes.advertising,
591 __ETHTOOL_LINK_MODE_MASK_NBITS,
592 link_usettings.link_modes.advertising,
593 __ETHTOOL_LINK_MODE_MASK_NU32);
594 bitmap_from_u32array(to->link_modes.lp_advertising,
595 __ETHTOOL_LINK_MODE_MASK_NBITS,
596 link_usettings.link_modes.lp_advertising,
597 __ETHTOOL_LINK_MODE_MASK_NU32);
598
599 return 0;
600}
601
602/* convert a kernel internal ethtool_link_ksettings to
603 * ethtool_link_usettings in user space. return 0 on success, errno on
604 * error.
605 */
606static int
607store_link_ksettings_for_user(void __user *to,
608 const struct ethtool_link_ksettings *from)
609{
610 struct ethtool_link_usettings link_usettings;
611
612 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
613 bitmap_to_u32array(link_usettings.link_modes.supported,
614 __ETHTOOL_LINK_MODE_MASK_NU32,
615 from->link_modes.supported,
616 __ETHTOOL_LINK_MODE_MASK_NBITS);
617 bitmap_to_u32array(link_usettings.link_modes.advertising,
618 __ETHTOOL_LINK_MODE_MASK_NU32,
619 from->link_modes.advertising,
620 __ETHTOOL_LINK_MODE_MASK_NBITS);
621 bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
622 __ETHTOOL_LINK_MODE_MASK_NU32,
623 from->link_modes.lp_advertising,
624 __ETHTOOL_LINK_MODE_MASK_NBITS);
625
626 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
627 return -EFAULT;
628
629 return 0;
630}
631
632/* Query device for its ethtool_link_settings.
633 *
634 * Backward compatibility note: this function must fail when driver
635 * does not implement ethtool::get_link_ksettings, even if legacy
636 * ethtool_ops::get_settings is implemented. This tells new versions
637 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
638 * this driver, so that they can correctly access the ethtool_cmd
639 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
640 * implements ethtool_ops::get_settings anymore.
641 */
642static int ethtool_get_link_ksettings(struct net_device *dev,
643 void __user *useraddr)
644{
645 int err = 0;
646 struct ethtool_link_ksettings link_ksettings;
647
648 ASSERT_RTNL();
649
650 if (!dev->ethtool_ops->get_link_ksettings)
651 return -EOPNOTSUPP;
652
653 /* handle bitmap nbits handshake */
654 if (copy_from_user(&link_ksettings.base, useraddr,
655 sizeof(link_ksettings.base)))
656 return -EFAULT;
657
658 if (__ETHTOOL_LINK_MODE_MASK_NU32
659 != link_ksettings.base.link_mode_masks_nwords) {
660 /* wrong link mode nbits requested */
661 memset(&link_ksettings, 0, sizeof(link_ksettings));
793cf87d 662 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
3f1ac7a7
DD		 663 /* send back number of words required as negative val */
664 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
665 "need too many bits for link modes!");
666 link_ksettings.base.link_mode_masks_nwords
667 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
668
669 /* copy the base fields back to user, not the link
670 * mode bitmaps
671 */
672 if (copy_to_user(useraddr, &link_ksettings.base,
673 sizeof(link_ksettings.base)))
674 return -EFAULT;
675
676 return 0;
677 }
678
679 /* handshake successful: user/kernel agree on
680 * link_mode_masks_nwords
681 */
682
683 memset(&link_ksettings, 0, sizeof(link_ksettings));
684 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
685 if (err < 0)
686 return err;
687
688 /* make sure we tell the right values to user */
689 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
690 link_ksettings.base.link_mode_masks_nwords
691 = __ETHTOOL_LINK_MODE_MASK_NU32;
692
693 return store_link_ksettings_for_user(useraddr, &link_ksettings);
694}
695
696/* Update device ethtool_link_settings.
697 *
698 * Backward compatibility note: this function must fail when driver
699 * does not implement ethtool::set_link_ksettings, even if legacy
700 * ethtool_ops::set_settings is implemented. This tells new versions
701 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
702 * this driver, so that they can correctly update the ethtool_cmd
703 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
704 * implements ethtool_ops::get_settings anymore.
705 */
706static int ethtool_set_link_ksettings(struct net_device *dev,
707 void __user *useraddr)
708{
709 int err;
710 struct ethtool_link_ksettings link_ksettings;
711
712 ASSERT_RTNL();
713
714 if (!dev->ethtool_ops->set_link_ksettings)
715 return -EOPNOTSUPP;
716
717 /* make sure nbits field has expected value */
718 if (copy_from_user(&link_ksettings.base, useraddr,
719 sizeof(link_ksettings.base)))
720 return -EFAULT;
721
722 if (__ETHTOOL_LINK_MODE_MASK_NU32
723 != link_ksettings.base.link_mode_masks_nwords)
724 return -EINVAL;
725
726 /* copy the whole structure, now that we know it has expected
727 * format
728 */
729 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
730 if (err)
731 return err;
732
733 /* re-check nwords field, just in case */
734 if (__ETHTOOL_LINK_MODE_MASK_NU32
735 != link_ksettings.base.link_mode_masks_nwords)
736 return -EINVAL;
737
738 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
739}
740
3f1ac7a7
DD		 741static void
742warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
743{
744 char name[sizeof(current->comm)];
745
746 pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
747 get_task_comm(name, current), details);
748}
749
750/* Query device for its ethtool_cmd settings.
751 *
752 * Backward compatibility note: for compatibility with legacy ethtool,
753 * this has to work with both drivers implementing get_link_ksettings
754 * API and drivers implementing get_settings API. When drivers
755 * implement get_link_ksettings and report higher link mode bits, a
756 * kernel warning is logged once (with name of 1st driver/device) to
757 * recommend user to upgrade ethtool, but the command is successful
758 * (only the lower link mode bits reported back to user).
759 */
4bc71cb9
JP		 760static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
761{
4bc71cb9
JP		 762 struct ethtool_cmd cmd;
763
3f1ac7a7
DD		 764 ASSERT_RTNL();
765
766 if (dev->ethtool_ops->get_link_ksettings) {
767 /* First, use link_ksettings API if it is supported */
768 int err;
769 struct ethtool_link_ksettings link_ksettings;
770
771 memset(&link_ksettings, 0, sizeof(link_ksettings));
772 err = dev->ethtool_ops->get_link_ksettings(dev,
773 &link_ksettings);
774 if (err < 0)
775 return err;
776 if (!convert_link_ksettings_to_legacy_settings(&cmd,
777 &link_ksettings))
778 warn_incomplete_ethtool_legacy_settings_conversion(
779 "link modes are only partially reported");
780
781 /* send a sensible cmd tag back to user */
782 cmd.cmd = ETHTOOL_GSET;
783 } else {
3f1ac7a7
DD		 784 /* driver doesn't support %ethtool_link_ksettings
785 * API. revert to legacy %ethtool_cmd API, unless it's
786 * not supported either.
787 */
3237fc63
DD		 788 int err;
789
790 if (!dev->ethtool_ops->get_settings)
791 return -EOPNOTSUPP;
792
793 memset(&cmd, 0, sizeof(cmd));
794 cmd.cmd = ETHTOOL_GSET;
795 err = dev->ethtool_ops->get_settings(dev, &cmd);
3f1ac7a7
DD		 796 if (err < 0)
797 return err;
798 }
1da177e4
LT		 799
800 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
801 return -EFAULT;
3f1ac7a7 802
1da177e4
LT		 803 return 0;
804}
805
3f1ac7a7
DD		 806/* Update device link settings with given ethtool_cmd.
807 *
808 * Backward compatibility note: for compatibility with legacy ethtool,
809 * this has to work with both drivers implementing set_link_ksettings
810 * API and drivers implementing set_settings API. When drivers
811 * implement set_link_ksettings and user's request updates deprecated
812 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
813 * warning is logged once (with name of 1st driver/device) to
814 * recommend user to upgrade ethtool, and the request is rejected.
815 */
1da177e4
LT		 816static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
817{
818 struct ethtool_cmd cmd;
819
3f1ac7a7 820 ASSERT_RTNL();
1da177e4
LT		 821
822 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
823 return -EFAULT;
824
3f1ac7a7
DD		 825 /* first, try new %ethtool_link_ksettings API. */
826 if (dev->ethtool_ops->set_link_ksettings) {
827 struct ethtool_link_ksettings link_ksettings;
828
829 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
830 &cmd))
831 return -EINVAL;
832
833 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
834 link_ksettings.base.link_mode_masks_nwords
835 = __ETHTOOL_LINK_MODE_MASK_NU32;
836 return dev->ethtool_ops->set_link_ksettings(dev,
837 &link_ksettings);
838 }
839
840 /* legacy %ethtool_cmd API */
841
842 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
843 * disappears internally
844 */
845
846 if (!dev->ethtool_ops->set_settings)
847 return -EOPNOTSUPP;
848
1da177e4
LT		 849 return dev->ethtool_ops->set_settings(dev, &cmd);
850}
851
97f8aefb 852static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
853 void __user *useraddr)
1da177e4
LT		 854{
855 struct ethtool_drvinfo info;
76fd8593 856 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 857
1da177e4
LT		 858 memset(&info, 0, sizeof(info));
859 info.cmd = ETHTOOL_GDRVINFO;
c03a14e8 860 if (ops->get_drvinfo) {
01414802
BH		 861 ops->get_drvinfo(dev, &info);
862 } else if (dev->dev.parent && dev->dev.parent->driver) {
863 strlcpy(info.bus_info, dev_name(dev->dev.parent),
864 sizeof(info.bus_info));
865 strlcpy(info.driver, dev->dev.parent->driver->name,
866 sizeof(info.driver));
867 } else {
868 return -EOPNOTSUPP;
869 }
1da177e4 870
723b2f57
JG		 871 /*
872 * this method of obtaining string set info is deprecated;
d17792eb 873 * Use ETHTOOL_GSSET_INFO instead.
723b2f57 874 */
c03a14e8 875 if (ops->get_sset_count) {
ff03d49f
JG		 876 int rc;
877
878 rc = ops->get_sset_count(dev, ETH_SS_TEST);
879 if (rc >= 0)
880 info.testinfo_len = rc;
881 rc = ops->get_sset_count(dev, ETH_SS_STATS);
882 if (rc >= 0)
883 info.n_stats = rc;
339bf024
JG		 884 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
885 if (rc >= 0)
886 info.n_priv_flags = rc;
ff03d49f 887 }
c03a14e8 888 if (ops->get_regs_len)
1da177e4 889 info.regdump_len = ops->get_regs_len(dev);
c03a14e8 890 if (ops->get_eeprom_len)
1da177e4
LT		 891 info.eedump_len = ops->get_eeprom_len(dev);
892
893 if (copy_to_user(useraddr, &info, sizeof(info)))
894 return -EFAULT;
895 return 0;
896}
897
f5c445ed 898static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
97f8aefb 899 void __user *useraddr)
723b2f57
JG		 900{
901 struct ethtool_sset_info info;
723b2f57
JG		 902 u64 sset_mask;
903 int i, idx = 0, n_bits = 0, ret, rc;
904 u32 *info_buf = NULL;
905
723b2f57
JG		 906 if (copy_from_user(&info, useraddr, sizeof(info)))
907 return -EFAULT;
908
909 /* store copy of mask, because we zero struct later on */
910 sset_mask = info.sset_mask;
911 if (!sset_mask)
912 return 0;
913
914 /* calculate size of return buffer */
d17792eb 915 n_bits = hweight64(sset_mask);
723b2f57
JG		 916
917 memset(&info, 0, sizeof(info));
918 info.cmd = ETHTOOL_GSSET_INFO;
919
920 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
921 if (!info_buf)
922 return -ENOMEM;
923
924 /*
925 * fill return buffer based on input bitmask and successful
926 * get_sset_count return
927 */
928 for (i = 0; i < 64; i++) {
929 if (!(sset_mask & (1ULL << i)))
930 continue;
931
340ae165 932 rc = __ethtool_get_sset_count(dev, i);
723b2f57
JG		 933 if (rc >= 0) {
934 info.sset_mask |= (1ULL << i);
935 info_buf[idx++] = rc;
936 }
937 }
938
939 ret = -EFAULT;
940 if (copy_to_user(useraddr, &info, sizeof(info)))
941 goto out;
942
943 useraddr += offsetof(struct ethtool_sset_info, data);
944 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
945 goto out;
946
947 ret = 0;
948
949out:
950 kfree(info_buf);
951 return ret;
952}
953
97f8aefb 954static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
bf988435 955 u32 cmd, void __user *useraddr)
0853ad66 956{
bf988435
BH		 957 struct ethtool_rxnfc info;
958 size_t info_size = sizeof(info);
55664f32 959 int rc;
0853ad66 960
59089d8d 961 if (!dev->ethtool_ops->set_rxnfc)
0853ad66
SB		 962 return -EOPNOTSUPP;
963
bf988435
BH		 964 /* struct ethtool_rxnfc was originally defined for
965 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
966 * members. User-space might still be using that
967 * definition. */
968 if (cmd == ETHTOOL_SRXFH)
969 info_size = (offsetof(struct ethtool_rxnfc, data) +
970 sizeof(info.data));
971
972 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 973 return -EFAULT;
974
55664f32
BH		 975 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
976 if (rc)
977 return rc;
978
979 if (cmd == ETHTOOL_SRXCLSRLINS &&
980 copy_to_user(useraddr, &info, info_size))
981 return -EFAULT;
982
983 return 0;
0853ad66
SB		 984}
985
97f8aefb 986static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
bf988435 987 u32 cmd, void __user *useraddr)
0853ad66
SB		 988{
989 struct ethtool_rxnfc info;
bf988435 990 size_t info_size = sizeof(info);
59089d8d
SB		 991 const struct ethtool_ops *ops = dev->ethtool_ops;
992 int ret;
993 void *rule_buf = NULL;
0853ad66 994
59089d8d 995 if (!ops->get_rxnfc)
0853ad66
SB		 996 return -EOPNOTSUPP;
997
bf988435
BH		 998 /* struct ethtool_rxnfc was originally defined for
999 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1000 * members. User-space might still be using that
1001 * definition. */
1002 if (cmd == ETHTOOL_GRXFH)
1003 info_size = (offsetof(struct ethtool_rxnfc, data) +
1004 sizeof(info.data));
1005
1006 if (copy_from_user(&info, useraddr, info_size))
0853ad66
SB		 1007 return -EFAULT;
1008
59089d8d
SB		 1009 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1010 if (info.rule_cnt > 0) {
db048b69 1011 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
ae6df5f9 1012 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
db048b69 1013 GFP_USER);
59089d8d
SB		 1014 if (!rule_buf)
1015 return -ENOMEM;
1016 }
1017 }
0853ad66 1018
59089d8d
SB		 1019 ret = ops->get_rxnfc(dev, &info, rule_buf);
1020 if (ret < 0)
1021 goto err_out;
1022
1023 ret = -EFAULT;
bf988435 1024 if (copy_to_user(useraddr, &info, info_size))
59089d8d
SB		 1025 goto err_out;
1026
1027 if (rule_buf) {
1028 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1029 if (copy_to_user(useraddr, rule_buf,
1030 info.rule_cnt * sizeof(u32)))
1031 goto err_out;
1032 }
1033 ret = 0;
1034
1035err_out:
c9caceca 1036 kfree(rule_buf);
59089d8d
SB		 1037
1038 return ret;
0853ad66
SB		 1039}
1040
3de0b592
VD		 1041static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1042 struct ethtool_rxnfc *rx_rings,
1043 u32 size)
1044{
fb95cd8d 1045 int i;
3de0b592
VD		 1046
1047 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
fb95cd8d 1048 return -EFAULT;
3de0b592
VD		 1049
1050 /* Validate ring indices */
fb95cd8d
BH		 1051 for (i = 0; i < size; i++)
1052 if (indir[i] >= rx_rings->data)
1053 return -EINVAL;
1054
1055 return 0;
3de0b592
VD		 1056}
1057
ba905f5e 1058u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
960fb622
ED		 1059
1060void netdev_rss_key_fill(void *buffer, size_t len)
1061{
1062 BUG_ON(len > sizeof(netdev_rss_key));
1063 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1064 memcpy(buffer, netdev_rss_key, len);
1065}
1066EXPORT_SYMBOL(netdev_rss_key_fill);
1067
d4ab4286
KJ		 1068static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1069{
1070 u32 dev_size, current_max = 0;
1071 u32 *indir;
1072 int ret;
1073
1074 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1075 !dev->ethtool_ops->get_rxfh)
1076 return -EOPNOTSUPP;
1077 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1078 if (dev_size == 0)
1079 return -EOPNOTSUPP;
1080
1081 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1082 if (!indir)
1083 return -ENOMEM;
1084
1085 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1086 if (ret)
1087 goto out;
1088
1089 while (dev_size--)
1090 current_max = max(current_max, indir[dev_size]);
1091
1092 *max = current_max;
1093
1094out:
1095 kfree(indir);
1096 return ret;
1097}
1098
a5b6ee29
BH		 1099static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1100 void __user *useraddr)
1101{
7850f63f
BH		 1102 u32 user_size, dev_size;
1103 u32 *indir;
a5b6ee29
BH		 1104 int ret;
1105
7850f63f 1106 if (!dev->ethtool_ops->get_rxfh_indir_size ||
fe62d001 1107 !dev->ethtool_ops->get_rxfh)
7850f63f
BH		 1108 return -EOPNOTSUPP;
1109 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1110 if (dev_size == 0)
a5b6ee29
BH		 1111 return -EOPNOTSUPP;
1112
7850f63f 1113 if (copy_from_user(&user_size,
a5b6ee29 1114 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1115 sizeof(user_size)))
a5b6ee29
BH		 1116 return -EFAULT;
1117
7850f63f
BH		 1118 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1119 &dev_size, sizeof(dev_size)))
1120 return -EFAULT;
1121
1122 /* If the user buffer size is 0, this is just a query for the
1123 * device table size. Otherwise, if it's smaller than the
1124 * device table size it's an error.
1125 */
1126 if (user_size < dev_size)
1127 return user_size == 0 ? 0 : -EINVAL;
1128
1129 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1130 if (!indir)
1131 return -ENOMEM;
1132
892311f6 1133 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
a5b6ee29
BH		 1134 if (ret)
1135 goto out;
1136
7850f63f
BH		 1137 if (copy_to_user(useraddr +
1138 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1139 indir, dev_size * sizeof(indir[0])))
a5b6ee29
BH		 1140 ret = -EFAULT;
1141
1142out:
1143 kfree(indir);
1144 return ret;
1145}
1146
1147static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1148 void __user *useraddr)
1149{
7850f63f
BH		 1150 struct ethtool_rxnfc rx_rings;
1151 u32 user_size, dev_size, i;
1152 u32 *indir;
c03a14e8 1153 const struct ethtool_ops *ops = dev->ethtool_ops;
a5b6ee29 1154 int ret;
3de0b592 1155 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
a5b6ee29 1156
fe62d001 1157 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
c03a14e8 1158 !ops->get_rxnfc)
7850f63f 1159 return -EOPNOTSUPP;
c03a14e8
JP		 1160
1161 dev_size = ops->get_rxfh_indir_size(dev);
7850f63f 1162 if (dev_size == 0)
a5b6ee29
BH		 1163 return -EOPNOTSUPP;
1164
7850f63f 1165 if (copy_from_user(&user_size,
a5b6ee29 1166 useraddr + offsetof(struct ethtool_rxfh_indir, size),
7850f63f 1167 sizeof(user_size)))
a5b6ee29
BH		 1168 return -EFAULT;
1169
278bc429 1170 if (user_size != 0 && user_size != dev_size)
7850f63f
BH		 1171 return -EINVAL;
1172
1173 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
a5b6ee29
BH		 1174 if (!indir)
1175 return -ENOMEM;
1176
7850f63f 1177 rx_rings.cmd = ETHTOOL_GRXRINGS;
c03a14e8 1178 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
7850f63f
BH		 1179 if (ret)
1180 goto out;
278bc429
BH		 1181
1182 if (user_size == 0) {
1183 for (i = 0; i < dev_size; i++)
1184 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1185 } else {
3de0b592
VD		 1186 ret = ethtool_copy_validate_indir(indir,
1187 useraddr + ringidx_offset,
1188 &rx_rings,
1189 dev_size);
1190 if (ret)
1191 goto out;
1192 }
1193
892311f6 1194 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
d4ab4286
KJ		 1195 if (ret)
1196 goto out;
1197
1198 /* indicate whether rxfh was set to default */
1199 if (user_size == 0)
1200 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1201 else
1202 dev->priv_flags |= IFF_RXFH_CONFIGURED;
3de0b592
VD		 1203
1204out:
1205 kfree(indir);
1206 return ret;
1207}
1208
1209static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1210 void __user *useraddr)
1211{
1212 int ret;
1213 const struct ethtool_ops *ops = dev->ethtool_ops;
f062a384 1214 u32 user_indir_size, user_key_size;
3de0b592 1215 u32 dev_indir_size = 0, dev_key_size = 0;
f062a384 1216 struct ethtool_rxfh rxfh;
3de0b592 1217 u32 total_size;
f062a384 1218 u32 indir_bytes;
3de0b592 1219 u32 *indir = NULL;
892311f6 1220 u8 dev_hfunc = 0;
3de0b592
VD		 1221 u8 *hkey = NULL;
1222 u8 *rss_config;
1223
892311f6 1224 if (!ops->get_rxfh)
3de0b592
VD		 1225 return -EOPNOTSUPP;
1226
1227 if (ops->get_rxfh_indir_size)
1228 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592
VD		 1229 if (ops->get_rxfh_key_size)
1230 dev_key_size = ops->get_rxfh_key_size(dev);
1231
f062a384 1232 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592 1233 return -EFAULT;
f062a384
BH		 1234 user_indir_size = rxfh.indir_size;
1235 user_key_size = rxfh.key_size;
3de0b592 1236
f062a384 1237 /* Check that reserved fields are 0 for now */
892311f6
EP		 1238 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1239 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1240 return -EINVAL;
1241
1242 rxfh.indir_size = dev_indir_size;
1243 rxfh.key_size = dev_key_size;
1244 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
3de0b592
VD		 1245 return -EFAULT;
1246
3de0b592
VD		 1247 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1248 (user_key_size && (user_key_size != dev_key_size)))
1249 return -EINVAL;
1250
1251 indir_bytes = user_indir_size * sizeof(indir[0]);
1252 total_size = indir_bytes + user_key_size;
1253 rss_config = kzalloc(total_size, GFP_USER);
1254 if (!rss_config)
1255 return -ENOMEM;
1256
1257 if (user_indir_size)
1258 indir = (u32 *)rss_config;
1259
1260 if (user_key_size)
1261 hkey = rss_config + indir_bytes;
1262
892311f6
EP		 1263 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1264 if (ret)
1265 goto out;
3de0b592 1266
892311f6
EP		 1267 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1268 &dev_hfunc, sizeof(rxfh.hfunc))) {
1269 ret = -EFAULT;
1270 } else if (copy_to_user(useraddr +
1271 offsetof(struct ethtool_rxfh, rss_config[0]),
1272 rss_config, total_size)) {
1273 ret = -EFAULT;
1274 }
1275out:
3de0b592
VD		 1276 kfree(rss_config);
1277
1278 return ret;
1279}
1280
1281static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1282 void __user *useraddr)
1283{
1284 int ret;
1285 const struct ethtool_ops *ops = dev->ethtool_ops;
1286 struct ethtool_rxnfc rx_rings;
f062a384
BH		 1287 struct ethtool_rxfh rxfh;
1288 u32 dev_indir_size = 0, dev_key_size = 0, i;
3de0b592
VD		 1289 u32 *indir = NULL, indir_bytes = 0;
1290 u8 *hkey = NULL;
1291 u8 *rss_config;
3de0b592
VD		 1292 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1293
892311f6 1294 if (!ops->get_rxnfc || !ops->set_rxfh)
3de0b592
VD		 1295 return -EOPNOTSUPP;
1296
1297 if (ops->get_rxfh_indir_size)
1298 dev_indir_size = ops->get_rxfh_indir_size(dev);
3de0b592 1299 if (ops->get_rxfh_key_size)
d340c862 1300 dev_key_size = ops->get_rxfh_key_size(dev);
3de0b592 1301
f062a384 1302 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
3de0b592
VD		 1303 return -EFAULT;
1304
f062a384 1305 /* Check that reserved fields are 0 for now */
892311f6
EP		 1306 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1307 rxfh.rsvd8[2] || rxfh.rsvd32)
f062a384
BH		 1308 return -EINVAL;
1309
892311f6
EP		 1310 /* If either indir, hash key or function is valid, proceed further.
1311 * Must request at least one change: indir size, hash key or function.
3de0b592 1312 */
f062a384
BH		 1313 if ((rxfh.indir_size &&
1314 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1315 rxfh.indir_size != dev_indir_size) ||
1316 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1317 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
892311f6 1318 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
3de0b592
VD		 1319 return -EINVAL;
1320
f062a384 1321 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
3de0b592
VD		 1322 indir_bytes = dev_indir_size * sizeof(indir[0]);
1323
f062a384 1324 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
3de0b592
VD		 1325 if (!rss_config)
1326 return -ENOMEM;
1327
1328 rx_rings.cmd = ETHTOOL_GRXRINGS;
1329 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1330 if (ret)
1331 goto out;
1332
f062a384
BH		 1333 /* rxfh.indir_size == 0 means reset the indir table to default.
1334 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
3de0b592 1335 */
f062a384
BH		 1336 if (rxfh.indir_size &&
1337 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
3de0b592
VD		 1338 indir = (u32 *)rss_config;
1339 ret = ethtool_copy_validate_indir(indir,
1340 useraddr + rss_cfg_offset,
1341 &rx_rings,
f062a384 1342 rxfh.indir_size);
3de0b592 1343 if (ret)
7850f63f 1344 goto out;
f062a384 1345 } else if (rxfh.indir_size == 0) {
3de0b592
VD		 1346 indir = (u32 *)rss_config;
1347 for (i = 0; i < dev_indir_size; i++)
1348 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1349 }
278bc429 1350
f062a384 1351 if (rxfh.key_size) {
3de0b592
VD		 1352 hkey = rss_config + indir_bytes;
1353 if (copy_from_user(hkey,
1354 useraddr + rss_cfg_offset + indir_bytes,
f062a384 1355 rxfh.key_size)) {
3de0b592
VD		 1356 ret = -EFAULT;
1357 goto out;
278bc429 1358 }
7850f63f
BH		 1359 }
1360
892311f6 1361 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
d4ab4286
KJ		 1362 if (ret)
1363 goto out;
1364
1365 /* indicate whether rxfh was set to default */
1366 if (rxfh.indir_size == 0)
1367 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1368 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1369 dev->priv_flags |= IFF_RXFH_CONFIGURED;
a5b6ee29
BH		 1370
1371out:
3de0b592 1372 kfree(rss_config);
a5b6ee29
BH		 1373 return ret;
1374}
1375
1da177e4
LT		 1376static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1377{
1378 struct ethtool_regs regs;
76fd8593 1379 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4
LT		 1380 void *regbuf;
1381 int reglen, ret;
1382
1383 if (!ops->get_regs || !ops->get_regs_len)
1384 return -EOPNOTSUPP;
1385
1386 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1387 return -EFAULT;
1388
1389 reglen = ops->get_regs_len(dev);
1390 if (regs.len > reglen)
1391 regs.len = reglen;
1392
b7c7d01a 1393 regbuf = vzalloc(reglen);
67ae7cf1 1394 if (reglen && !regbuf)
1da177e4
LT		 1395 return -ENOMEM;
1396
1397 ops->get_regs(dev, &regs, regbuf);
1398
1399 ret = -EFAULT;
1400 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1401 goto out;
1402 useraddr += offsetof(struct ethtool_regs, data);
67ae7cf1 1403 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1da177e4
LT		 1404 goto out;
1405 ret = 0;
1406
1407 out:
a77f5db3 1408 vfree(regbuf);
1da177e4
LT		 1409 return ret;
1410}
1411
d73d3a8c
BH		 1412static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1413{
1414 struct ethtool_value reset;
1415 int ret;
1416
1417 if (!dev->ethtool_ops->reset)
1418 return -EOPNOTSUPP;
1419
1420 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1421 return -EFAULT;
1422
1423 ret = dev->ethtool_ops->reset(dev, &reset.data);
1424 if (ret)
1425 return ret;
1426
1427 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1428 return -EFAULT;
1429 return 0;
1430}
1431
1da177e4
LT		 1432static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1433{
8e557421 1434 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1da177e4
LT		 1435
1436 if (!dev->ethtool_ops->get_wol)
1437 return -EOPNOTSUPP;
1438
1439 dev->ethtool_ops->get_wol(dev, &wol);
1440
1441 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1442 return -EFAULT;
1443 return 0;
1444}
1445
1446static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1447{
1448 struct ethtool_wolinfo wol;
1449
1450 if (!dev->ethtool_ops->set_wol)
1451 return -EOPNOTSUPP;
1452
1453 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1454 return -EFAULT;
1455
1456 return dev->ethtool_ops->set_wol(dev, &wol);
1457}
1458
80f12ecc
YM		 1459static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1460{
1461 struct ethtool_eee edata;
1462 int rc;
1463
1464 if (!dev->ethtool_ops->get_eee)
1465 return -EOPNOTSUPP;
1466
1467 memset(&edata, 0, sizeof(struct ethtool_eee));
1468 edata.cmd = ETHTOOL_GEEE;
1469 rc = dev->ethtool_ops->get_eee(dev, &edata);
1470
1471 if (rc)
1472 return rc;
1473
1474 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1475 return -EFAULT;
1476
1477 return 0;
1478}
1479
1480static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1481{
1482 struct ethtool_eee edata;
1483
1484 if (!dev->ethtool_ops->set_eee)
1485 return -EOPNOTSUPP;
1486
1487 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1488 return -EFAULT;
1489
1490 return dev->ethtool_ops->set_eee(dev, &edata);
1491}
1492
1da177e4
LT		 1493static int ethtool_nway_reset(struct net_device *dev)
1494{
1495 if (!dev->ethtool_ops->nway_reset)
1496 return -EOPNOTSUPP;
1497
1498 return dev->ethtool_ops->nway_reset(dev);
1499}
1500
e596e6e4
BH		 1501static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1502{
1503 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1504
1505 if (!dev->ethtool_ops->get_link)
1506 return -EOPNOTSUPP;
1507
1508 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1509
1510 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1511 return -EFAULT;
1512 return 0;
1513}
1514
081d094e
BH		 1515static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1516 int (*getter)(struct net_device *,
1517 struct ethtool_eeprom *, u8 *),
1518 u32 total_len)
1da177e4
LT		 1519{
1520 struct ethtool_eeprom eeprom;
b131dd5d
MSB		 1521 void __user *userbuf = useraddr + sizeof(eeprom);
1522 u32 bytes_remaining;
1da177e4 1523 u8 *data;
b131dd5d 1524 int ret = 0;
1da177e4 1525
1da177e4
LT		 1526 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1527 return -EFAULT;
1528
1529 /* Check for wrap and zero */
1530 if (eeprom.offset + eeprom.len <= eeprom.offset)
1531 return -EINVAL;
1532
1533 /* Check for exceeding total eeprom len */
081d094e 1534 if (eeprom.offset + eeprom.len > total_len)
1da177e4
LT		 1535 return -EINVAL;
1536
b131dd5d 1537 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1538 if (!data)
1539 return -ENOMEM;
1540
b131dd5d
MSB		 1541 bytes_remaining = eeprom.len;
1542 while (bytes_remaining > 0) {
1543 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1544
081d094e 1545 ret = getter(dev, &eeprom, data);
b131dd5d
MSB		 1546 if (ret)
1547 break;
1548 if (copy_to_user(userbuf, data, eeprom.len)) {
1549 ret = -EFAULT;
1550 break;
1551 }
1552 userbuf += eeprom.len;
1553 eeprom.offset += eeprom.len;
1554 bytes_remaining -= eeprom.len;
1555 }
1da177e4 1556
c5835df9
MSB		 1557 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1558 eeprom.offset -= eeprom.len;
1559 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1560 ret = -EFAULT;
1561
1da177e4
LT		 1562 kfree(data);
1563 return ret;
1564}
1565
081d094e
BH		 1566static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1567{
1568 const struct ethtool_ops *ops = dev->ethtool_ops;
1569
e0fb6fb6
GR		 1570 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1571 !ops->get_eeprom_len(dev))
081d094e
BH		 1572 return -EOPNOTSUPP;
1573
1574 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1575 ops->get_eeprom_len(dev));
1576}
1577
1da177e4
LT		 1578static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1579{
1580 struct ethtool_eeprom eeprom;
76fd8593 1581 const struct ethtool_ops *ops = dev->ethtool_ops;
b131dd5d
MSB		 1582 void __user *userbuf = useraddr + sizeof(eeprom);
1583 u32 bytes_remaining;
1da177e4 1584 u8 *data;
b131dd5d 1585 int ret = 0;
1da177e4 1586
e0fb6fb6
GR		 1587 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1588 !ops->get_eeprom_len(dev))
1da177e4
LT		 1589 return -EOPNOTSUPP;
1590
1591 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1592 return -EFAULT;
1593
1594 /* Check for wrap and zero */
1595 if (eeprom.offset + eeprom.len <= eeprom.offset)
1596 return -EINVAL;
1597
1598 /* Check for exceeding total eeprom len */
1599 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1600 return -EINVAL;
1601
b131dd5d 1602 data = kmalloc(PAGE_SIZE, GFP_USER);
1da177e4
LT		 1603 if (!data)
1604 return -ENOMEM;
1605
b131dd5d
MSB		 1606 bytes_remaining = eeprom.len;
1607 while (bytes_remaining > 0) {
1608 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1609
1610 if (copy_from_user(data, userbuf, eeprom.len)) {
1611 ret = -EFAULT;
1612 break;
1613 }
1614 ret = ops->set_eeprom(dev, &eeprom, data);
1615 if (ret)
1616 break;
1617 userbuf += eeprom.len;
1618 eeprom.offset += eeprom.len;
1619 bytes_remaining -= eeprom.len;
1620 }
1da177e4 1621
1da177e4
LT		 1622 kfree(data);
1623 return ret;
1624}
1625
97f8aefb 1626static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1627 void __user *useraddr)
1da177e4 1628{
8e557421 1629 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1da177e4
LT		 1630
1631 if (!dev->ethtool_ops->get_coalesce)
1632 return -EOPNOTSUPP;
1633
1634 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1635
1636 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1637 return -EFAULT;
1638 return 0;
1639}
1640
97f8aefb 1641static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1642 void __user *useraddr)
1da177e4
LT		 1643{
1644 struct ethtool_coalesce coalesce;
1645
fa04ae5c 1646 if (!dev->ethtool_ops->set_coalesce)
1da177e4
LT		 1647 return -EOPNOTSUPP;
1648
1649 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1650 return -EFAULT;
1651
1652 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1653}
1654
1655static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1656{
8e557421 1657 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1da177e4
LT		 1658
1659 if (!dev->ethtool_ops->get_ringparam)
1660 return -EOPNOTSUPP;
1661
1662 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1663
1664 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1665 return -EFAULT;
1666 return 0;
1667}
1668
1669static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1670{
1671 struct ethtool_ringparam ringparam;
1672
1673 if (!dev->ethtool_ops->set_ringparam)
1674 return -EOPNOTSUPP;
1675
1676 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1677 return -EFAULT;
1678
1679 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1680}
1681
8b5933c3 1682static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1683 void __user *useraddr)
1684{
1685 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1686
1687 if (!dev->ethtool_ops->get_channels)
1688 return -EOPNOTSUPP;
1689
1690 dev->ethtool_ops->get_channels(dev, &channels);
1691
1692 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1693 return -EFAULT;
1694 return 0;
1695}
1696
1697static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1698 void __user *useraddr)
1699{
8bf36862 1700 struct ethtool_channels channels, max;
d4ab4286 1701 u32 max_rx_in_use = 0;
8b5933c3 1702
8bf36862 1703 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
8b5933c3 1704 return -EOPNOTSUPP;
1705
1706 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1707 return -EFAULT;
1708
8bf36862
KJ		 1709 dev->ethtool_ops->get_channels(dev, &max);
1710
1711 /* ensure new counts are within the maximums */
1712 if ((channels.rx_count > max.max_rx) ||
1713 (channels.tx_count > max.max_tx) ||
1714 (channels.combined_count > max.max_combined) ||
1715 (channels.other_count > max.max_other))
1716 return -EINVAL;
1717
d4ab4286
KJ		 1718 /* ensure the new Rx count fits within the configured Rx flow
1719 * indirection table settings */
1720 if (netif_is_rxfh_configured(dev) &&
1721 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1722 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1723 return -EINVAL;
1724
8b5933c3 1725 return dev->ethtool_ops->set_channels(dev, &channels);
1726}
1727
1da177e4
LT		 1728static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1729{
1730 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1731
1732 if (!dev->ethtool_ops->get_pauseparam)
1733 return -EOPNOTSUPP;
1734
1735 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1736
1737 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1738 return -EFAULT;
1739 return 0;
1740}
1741
1742static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1743{
1744 struct ethtool_pauseparam pauseparam;
1745
e1b90c41 1746 if (!dev->ethtool_ops->set_pauseparam)
1da177e4
LT		 1747 return -EOPNOTSUPP;
1748
1749 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1750 return -EFAULT;
1751
1752 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1753}
1754
1da177e4
LT		 1755static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1756{
1757 struct ethtool_test test;
76fd8593 1758 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1759 u64 *data;
ff03d49f 1760 int ret, test_len;
1da177e4 1761
a9828ec6 1762 if (!ops->self_test || !ops->get_sset_count)
1da177e4
LT		 1763 return -EOPNOTSUPP;
1764
a9828ec6 1765 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
ff03d49f
JG		 1766 if (test_len < 0)
1767 return test_len;
1768 WARN_ON(test_len == 0);
1769
1da177e4
LT		 1770 if (copy_from_user(&test, useraddr, sizeof(test)))
1771 return -EFAULT;
1772
ff03d49f
JG		 1773 test.len = test_len;
1774 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1da177e4
LT		 1775 if (!data)
1776 return -ENOMEM;
1777
1778 ops->self_test(dev, &test, data);
1779
1780 ret = -EFAULT;
1781 if (copy_to_user(useraddr, &test, sizeof(test)))
1782 goto out;
1783 useraddr += sizeof(test);
1784 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1785 goto out;
1786 ret = 0;
1787
1788 out:
1789 kfree(data);
1790 return ret;
1791}
1792
1793static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1794{
1795 struct ethtool_gstrings gstrings;
1da177e4
LT		 1796 u8 *data;
1797 int ret;
1798
1da177e4
LT		 1799 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1800 return -EFAULT;
1801
340ae165 1802 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
a9828ec6
BH		 1803 if (ret < 0)
1804 return ret;
1805
1806 gstrings.len = ret;
1da177e4 1807
077cb37f 1808 data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
1da177e4
LT		 1809 if (!data)
1810 return -ENOMEM;
1811
340ae165 1812 __ethtool_get_strings(dev, gstrings.string_set, data);
1da177e4
LT		 1813
1814 ret = -EFAULT;
1815 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1816 goto out;
1817 useraddr += sizeof(gstrings);
1818 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1819 goto out;
1820 ret = 0;
1821
340ae165 1822out:
1da177e4
LT		 1823 kfree(data);
1824 return ret;
1825}
1826
1827static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1828{
1829 struct ethtool_value id;
68f512f2 1830 static bool busy;
c03a14e8 1831 const struct ethtool_ops *ops = dev->ethtool_ops;
68f512f2 1832 int rc;
1da177e4 1833
c03a14e8 1834 if (!ops->set_phys_id)
1da177e4
LT		 1835 return -EOPNOTSUPP;
1836
68f512f2
BH		 1837 if (busy)
1838 return -EBUSY;
1839
1da177e4
LT		 1840 if (copy_from_user(&id, useraddr, sizeof(id)))
1841 return -EFAULT;
1842
c03a14e8 1843 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
fce55922 1844 if (rc < 0)
68f512f2
BH		 1845 return rc;
1846
1847 /* Drop the RTNL lock while waiting, but prevent reentry or
1848 * removal of the device.
1849 */
1850 busy = true;
1851 dev_hold(dev);
1852 rtnl_unlock();
1853
1854 if (rc == 0) {
1855 /* Driver will handle this itself */
1856 schedule_timeout_interruptible(
143780c6 1857 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
68f512f2 1858 } else {
fce55922
AB		 1859 /* Driver expects to be called at twice the frequency in rc */
1860 int n = rc * 2, i, interval = HZ / n;
1861
1862 /* Count down seconds */
68f512f2 1863 do {
fce55922
AB		 1864 /* Count down iterations per second */
1865 i = n;
1866 do {
1867 rtnl_lock();
c03a14e8 1868 rc = ops->set_phys_id(dev,
fce55922
AB		 1869 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1870 rtnl_unlock();
1871 if (rc)
1872 break;
1873 schedule_timeout_interruptible(interval);
1874 } while (!signal_pending(current) && --i != 0);
68f512f2
BH		 1875 } while (!signal_pending(current) &&
1876 (id.data == 0 || --id.data != 0));
1877 }
1878
1879 rtnl_lock();
1880 dev_put(dev);
1881 busy = false;
1882
c03a14e8 1883 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
68f512f2 1884 return rc;
1da177e4
LT		 1885}
1886
1887static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1888{
1889 struct ethtool_stats stats;
76fd8593 1890 const struct ethtool_ops *ops = dev->ethtool_ops;
1da177e4 1891 u64 *data;
ff03d49f 1892 int ret, n_stats;
1da177e4 1893
a9828ec6 1894 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1da177e4
LT		 1895 return -EOPNOTSUPP;
1896
a9828ec6 1897 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
ff03d49f
JG		 1898 if (n_stats < 0)
1899 return n_stats;
1900 WARN_ON(n_stats == 0);
1901
1da177e4
LT		 1902 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1903 return -EFAULT;
1904
ff03d49f
JG		 1905 stats.n_stats = n_stats;
1906 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1da177e4
LT		 1907 if (!data)
1908 return -ENOMEM;
1909
1910 ops->get_ethtool_stats(dev, &stats, data);
1911
1912 ret = -EFAULT;
1913 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1914 goto out;
1915 useraddr += sizeof(stats);
1916 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1917 goto out;
1918 ret = 0;
1919
1920 out:
1921 kfree(data);
1922 return ret;
1923}
1924
f3a40945
AL		 1925static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1926{
1927 struct ethtool_stats stats;
1928 struct phy_device *phydev = dev->phydev;
1929 u64 *data;
1930 int ret, n_stats;
1931
1932 if (!phydev)
1933 return -EOPNOTSUPP;
1934
1935 n_stats = phy_get_sset_count(phydev);
1936
1937 if (n_stats < 0)
1938 return n_stats;
1939 WARN_ON(n_stats == 0);
1940
1941 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1942 return -EFAULT;
1943
1944 stats.n_stats = n_stats;
1945 data = kmalloc_array(n_stats, sizeof(u64), GFP_USER);
1946 if (!data)
1947 return -ENOMEM;
1948
1949 mutex_lock(&phydev->lock);
1950 phydev->drv->get_stats(phydev, &stats, data);
1951 mutex_unlock(&phydev->lock);
1952
1953 ret = -EFAULT;
1954 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1955 goto out;
1956 useraddr += sizeof(stats);
1957 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1958 goto out;
1959 ret = 0;
1960
1961 out:
1962 kfree(data);
1963 return ret;
1964}
1965
0bf0519d 1966static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
a6f9a705
JW		 1967{
1968 struct ethtool_perm_addr epaddr;
a6f9a705 1969
313674af 1970 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
a6f9a705
JW		 1971 return -EFAULT;
1972
313674af
MW		 1973 if (epaddr.size < dev->addr_len)
1974 return -ETOOSMALL;
1975 epaddr.size = dev->addr_len;
a6f9a705 1976
a6f9a705 1977 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
313674af 1978 return -EFAULT;
a6f9a705 1979 useraddr += sizeof(epaddr);
313674af
MW		 1980 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1981 return -EFAULT;
1982 return 0;
a6f9a705
JW		 1983}
1984
13c99b24
JG		 1985static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1986 u32 cmd, u32 (*actor)(struct net_device *))
3ae7c0b2 1987{
8e557421 1988 struct ethtool_value edata = { .cmd = cmd };
3ae7c0b2 1989
13c99b24 1990 if (!actor)
3ae7c0b2
JG		 1991 return -EOPNOTSUPP;
1992
13c99b24 1993 edata.data = actor(dev);
3ae7c0b2
JG		 1994
1995 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1996 return -EFAULT;
1997 return 0;
1998}
1999
13c99b24
JG		 2000static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2001 void (*actor)(struct net_device *, u32))
3ae7c0b2
JG		 2002{
2003 struct ethtool_value edata;
2004
13c99b24 2005 if (!actor)
3ae7c0b2
JG		 2006 return -EOPNOTSUPP;
2007
2008 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2009 return -EFAULT;
2010
13c99b24 2011 actor(dev, edata.data);
339bf024
JG		 2012 return 0;
2013}
2014
13c99b24
JG		 2015static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2016 int (*actor)(struct net_device *, u32))
339bf024
JG		 2017{
2018 struct ethtool_value edata;
2019
13c99b24 2020 if (!actor)
339bf024
JG		 2021 return -EOPNOTSUPP;
2022
2023 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2024 return -EFAULT;
2025
13c99b24 2026 return actor(dev, edata.data);
339bf024
JG		 2027}
2028
97f8aefb 2029static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2030 char __user *useraddr)
05c6a8d7
AK		 2031{
2032 struct ethtool_flash efl;
2033
2034 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2035 return -EFAULT;
2036
2037 if (!dev->ethtool_ops->flash_device)
2038 return -EOPNOTSUPP;
2039
786f5281
BH		 2040 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2041
05c6a8d7
AK		 2042 return dev->ethtool_ops->flash_device(dev, &efl);
2043}
2044
29dd54b7
AC		 2045static int ethtool_set_dump(struct net_device *dev,
2046 void __user *useraddr)
2047{
2048 struct ethtool_dump dump;
2049
2050 if (!dev->ethtool_ops->set_dump)
2051 return -EOPNOTSUPP;
2052
2053 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2054 return -EFAULT;
2055
2056 return dev->ethtool_ops->set_dump(dev, &dump);
2057}
2058
2059static int ethtool_get_dump_flag(struct net_device *dev,
2060 void __user *useraddr)
2061{
2062 int ret;
2063 struct ethtool_dump dump;
2064 const struct ethtool_ops *ops = dev->ethtool_ops;
2065
c03a14e8 2066 if (!ops->get_dump_flag)
29dd54b7
AC		 2067 return -EOPNOTSUPP;
2068
2069 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2070 return -EFAULT;
2071
2072 ret = ops->get_dump_flag(dev, &dump);
2073 if (ret)
2074 return ret;
2075
2076 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2077 return -EFAULT;
2078 return 0;
2079}
2080
2081static int ethtool_get_dump_data(struct net_device *dev,
2082 void __user *useraddr)
2083{
2084 int ret;
2085 __u32 len;
2086 struct ethtool_dump dump, tmp;
2087 const struct ethtool_ops *ops = dev->ethtool_ops;
2088 void *data = NULL;
2089
c03a14e8 2090 if (!ops->get_dump_data || !ops->get_dump_flag)
29dd54b7
AC		 2091 return -EOPNOTSUPP;
2092
2093 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2094 return -EFAULT;
2095
2096 memset(&tmp, 0, sizeof(tmp));
2097 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2098 ret = ops->get_dump_flag(dev, &tmp);
2099 if (ret)
2100 return ret;
2101
c590b5e2 2102 len = min(tmp.len, dump.len);
29dd54b7
AC		 2103 if (!len)
2104 return -EFAULT;
2105
c590b5e2
MS		 2106 /* Don't ever let the driver think there's more space available
2107 * than it requested with .get_dump_flag().
2108 */
2109 dump.len = len;
2110
2111 /* Always allocate enough space to hold the whole thing so that the
2112 * driver does not need to check the length and bother with partial
2113 * dumping.
2114 */
29dd54b7
AC		 2115 data = vzalloc(tmp.len);
2116 if (!data)
2117 return -ENOMEM;
2118 ret = ops->get_dump_data(dev, &dump, data);
2119 if (ret)
2120 goto out;
2121
c590b5e2
MS		 2122 /* There are two sane possibilities:
2123 * 1. The driver's .get_dump_data() does not touch dump.len.
2124 * 2. Or it may set dump.len to how much it really writes, which
2125 * should be tmp.len (or len if it can do a partial dump).
2126 * In any case respond to userspace with the actual length of data
2127 * it's receiving.
2128 */
2129 WARN_ON(dump.len != len && dump.len != tmp.len);
2130 dump.len = len;
2131
29dd54b7
AC		 2132 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2133 ret = -EFAULT;
2134 goto out;
2135 }
2136 useraddr += offsetof(struct ethtool_dump, data);
2137 if (copy_to_user(useraddr, data, len))
2138 ret = -EFAULT;
2139out:
2140 vfree(data);
2141 return ret;
2142}
2143
c8f3a8c3
RC		 2144static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2145{
2146 int err = 0;
2147 struct ethtool_ts_info info;
2148 const struct ethtool_ops *ops = dev->ethtool_ops;
2149 struct phy_device *phydev = dev->phydev;
2150
2151 memset(&info, 0, sizeof(info));
2152 info.cmd = ETHTOOL_GET_TS_INFO;
2153
2154 if (phydev && phydev->drv && phydev->drv->ts_info) {
c8f3a8c3 2155 err = phydev->drv->ts_info(phydev, &info);
c03a14e8 2156 } else if (ops->get_ts_info) {
c8f3a8c3 2157 err = ops->get_ts_info(dev, &info);
c8f3a8c3
RC		 2158 } else {
2159 info.so_timestamping =
2160 SOF_TIMESTAMPING_RX_SOFTWARE |
2161 SOF_TIMESTAMPING_SOFTWARE;
2162 info.phc_index = -1;
2163 }
2164
2165 if (err)
2166 return err;
2167
2168 if (copy_to_user(useraddr, &info, sizeof(info)))
2169 err = -EFAULT;
2170
2171 return err;
2172}
2173
2f438366
ES		 2174static int __ethtool_get_module_info(struct net_device *dev,
2175 struct ethtool_modinfo *modinfo)
2176{
2177 const struct ethtool_ops *ops = dev->ethtool_ops;
2178 struct phy_device *phydev = dev->phydev;
2179
2180 if (phydev && phydev->drv && phydev->drv->module_info)
2181 return phydev->drv->module_info(phydev, modinfo);
2182
2183 if (ops->get_module_info)
2184 return ops->get_module_info(dev, modinfo);
2185
2186 return -EOPNOTSUPP;
2187}
2188
41c3cb6d
SH		 2189static int ethtool_get_module_info(struct net_device *dev,
2190 void __user *useraddr)
2191{
2192 int ret;
2193 struct ethtool_modinfo modinfo;
41c3cb6d
SH		 2194
2195 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2196 return -EFAULT;
2197
2f438366 2198 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2199 if (ret)
2200 return ret;
2201
2202 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2203 return -EFAULT;
2204
2205 return 0;
2206}
2207
2f438366
ES		 2208static int __ethtool_get_module_eeprom(struct net_device *dev,
2209 struct ethtool_eeprom *ee, u8 *data)
2210{
2211 const struct ethtool_ops *ops = dev->ethtool_ops;
2212 struct phy_device *phydev = dev->phydev;
2213
2214 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2215 return phydev->drv->module_eeprom(phydev, ee, data);
2216
2217 if (ops->get_module_eeprom)
2218 return ops->get_module_eeprom(dev, ee, data);
2219
2220 return -EOPNOTSUPP;
2221}
2222
41c3cb6d
SH		 2223static int ethtool_get_module_eeprom(struct net_device *dev,
2224 void __user *useraddr)
2225{
2226 int ret;
2227 struct ethtool_modinfo modinfo;
41c3cb6d 2228
2f438366 2229 ret = __ethtool_get_module_info(dev, &modinfo);
41c3cb6d
SH		 2230 if (ret)
2231 return ret;
2232
2f438366
ES		 2233 return ethtool_get_any_eeprom(dev, useraddr,
2234 __ethtool_get_module_eeprom,
41c3cb6d
SH		 2235 modinfo.eeprom_len);
2236}
2237
f0db9b07
GV		 2238static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2239{
2240 switch (tuna->id) {
2241 case ETHTOOL_RX_COPYBREAK:
1255a505 2242 case ETHTOOL_TX_COPYBREAK:
f0db9b07
GV		 2243 if (tuna->len != sizeof(u32) ||
2244 tuna->type_id != ETHTOOL_TUNABLE_U32)
2245 return -EINVAL;
2246 break;
2247 default:
2248 return -EINVAL;
2249 }
2250
2251 return 0;
2252}
2253
2254static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2255{
2256 int ret;
2257 struct ethtool_tunable tuna;
2258 const struct ethtool_ops *ops = dev->ethtool_ops;
2259 void *data;
2260
2261 if (!ops->get_tunable)
2262 return -EOPNOTSUPP;
2263 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2264 return -EFAULT;
2265 ret = ethtool_tunable_valid(&tuna);
2266 if (ret)
2267 return ret;
2268 data = kmalloc(tuna.len, GFP_USER);
2269 if (!data)
2270 return -ENOMEM;
2271 ret = ops->get_tunable(dev, &tuna, data);
2272 if (ret)
2273 goto out;
2274 useraddr += sizeof(tuna);
2275 ret = -EFAULT;
2276 if (copy_to_user(useraddr, data, tuna.len))
2277 goto out;
2278 ret = 0;
2279
2280out:
2281 kfree(data);
2282 return ret;
2283}
2284
2285static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2286{
2287 int ret;
2288 struct ethtool_tunable tuna;
2289 const struct ethtool_ops *ops = dev->ethtool_ops;
2290 void *data;
2291
2292 if (!ops->set_tunable)
2293 return -EOPNOTSUPP;
2294 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2295 return -EFAULT;
2296 ret = ethtool_tunable_valid(&tuna);
2297 if (ret)
2298 return ret;
2299 data = kmalloc(tuna.len, GFP_USER);
2300 if (!data)
2301 return -ENOMEM;
2302 useraddr += sizeof(tuna);
2303 ret = -EFAULT;
2304 if (copy_from_user(data, useraddr, tuna.len))
2305 goto out;
2306 ret = ops->set_tunable(dev, &tuna, data);
2307
2308out:
2309 kfree(data);
2310 return ret;
2311}
2312
421797b1
KL		 2313static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2314 void __user *useraddr,
2315 struct ethtool_per_queue_op *per_queue_opt)
2316{
2317 u32 bit;
2318 int ret;
2319 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2320
2321 if (!dev->ethtool_ops->get_per_queue_coalesce)
2322 return -EOPNOTSUPP;
2323
2324 useraddr += sizeof(*per_queue_opt);
2325
2326 bitmap_from_u32array(queue_mask,
2327 MAX_NUM_QUEUE,
2328 per_queue_opt->queue_mask,
2329 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2330
2331 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2332 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2333
2334 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2335 if (ret != 0)
2336 return ret;
2337 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2338 return -EFAULT;
2339 useraddr += sizeof(coalesce);
2340 }
2341
2342 return 0;
2343}
2344
f38d138a
KL		 2345static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2346 void __user *useraddr,
2347 struct ethtool_per_queue_op *per_queue_opt)
2348{
2349 u32 bit;
2350 int i, ret = 0;
2351 int n_queue;
2352 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2353 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2354
2355 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2356 (!dev->ethtool_ops->get_per_queue_coalesce))
2357 return -EOPNOTSUPP;
2358
2359 useraddr += sizeof(*per_queue_opt);
2360
2361 bitmap_from_u32array(queue_mask,
2362 MAX_NUM_QUEUE,
2363 per_queue_opt->queue_mask,
2364 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2365 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2366 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2367 if (!backup)
2368 return -ENOMEM;
2369
2370 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2371 struct ethtool_coalesce coalesce;
2372
2373 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2374 if (ret != 0)
2375 goto roll_back;
2376
2377 tmp++;
2378
2379 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2380 ret = -EFAULT;
2381 goto roll_back;
2382 }
2383
2384 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2385 if (ret != 0)
2386 goto roll_back;
2387
2388 useraddr += sizeof(coalesce);
2389 }
2390
2391roll_back:
2392 if (ret != 0) {
2393 tmp = backup;
2394 for_each_set_bit(i, queue_mask, bit) {
2395 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2396 tmp++;
2397 }
2398 }
2399 kfree(backup);
2400
2401 return ret;
2402}
2403
ac2c7ad0
KL		 2404static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2405{
2406 struct ethtool_per_queue_op per_queue_opt;
2407
2408 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2409 return -EFAULT;
2410
2411 switch (per_queue_opt.sub_command) {
421797b1
KL		 2412 case ETHTOOL_GCOALESCE:
2413 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
f38d138a
KL		 2414 case ETHTOOL_SCOALESCE:
2415 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
ac2c7ad0
KL		 2416 default:
2417 return -EOPNOTSUPP;
2418 };
2419}
2420
600fed5e 2421/* The main entry point in this file. Called from net/core/dev_ioctl.c */
1da177e4 2422
881d966b 2423int dev_ethtool(struct net *net, struct ifreq *ifr)
1da177e4 2424{
881d966b 2425 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1da177e4 2426 void __user *useraddr = ifr->ifr_data;
ac2c7ad0 2427 u32 ethcmd, sub_cmd;
1da177e4 2428 int rc;
b29d3145 2429 netdev_features_t old_features;
1da177e4 2430
1da177e4
LT		 2431 if (!dev || !netif_device_present(dev))
2432 return -ENODEV;
2433
97f8aefb 2434 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1da177e4
LT		 2435 return -EFAULT;
2436
ac2c7ad0
KL		 2437 if (ethcmd == ETHTOOL_PERQUEUE) {
2438 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2439 return -EFAULT;
2440 } else {
2441 sub_cmd = ethcmd;
2442 }
75f3123c 2443 /* Allow some commands to be done by anyone */
ac2c7ad0 2444 switch (sub_cmd) {
0fdc100b 2445 case ETHTOOL_GSET:
75f3123c 2446 case ETHTOOL_GDRVINFO:
75f3123c 2447 case ETHTOOL_GMSGLVL:
2da45db2 2448 case ETHTOOL_GLINK:
75f3123c
SH		 2449 case ETHTOOL_GCOALESCE:
2450 case ETHTOOL_GRINGPARAM:
2451 case ETHTOOL_GPAUSEPARAM:
2452 case ETHTOOL_GRXCSUM:
2453 case ETHTOOL_GTXCSUM:
2454 case ETHTOOL_GSG:
f80400a2 2455 case ETHTOOL_GSSET_INFO:
75f3123c 2456 case ETHTOOL_GSTRINGS:
2da45db2 2457 case ETHTOOL_GSTATS:
f3a40945 2458 case ETHTOOL_GPHYSTATS:
75f3123c
SH		 2459 case ETHTOOL_GTSO:
2460 case ETHTOOL_GPERMADDR:
2461 case ETHTOOL_GUFO:
2462 case ETHTOOL_GGSO:
1cab819b 2463 case ETHTOOL_GGRO:
339bf024
JG		 2464 case ETHTOOL_GFLAGS:
2465 case ETHTOOL_GPFLAGS:
0853ad66 2466 case ETHTOOL_GRXFH:
59089d8d
SB		 2467 case ETHTOOL_GRXRINGS:
2468 case ETHTOOL_GRXCLSRLCNT:
2469 case ETHTOOL_GRXCLSRULE:
2470 case ETHTOOL_GRXCLSRLALL:
2da45db2 2471 case ETHTOOL_GRXFHINDIR:
3de0b592 2472 case ETHTOOL_GRSSH:
5455c699 2473 case ETHTOOL_GFEATURES:
2da45db2 2474 case ETHTOOL_GCHANNELS:
c8f3a8c3 2475 case ETHTOOL_GET_TS_INFO:
2da45db2 2476 case ETHTOOL_GEEE:
f0db9b07 2477 case ETHTOOL_GTUNABLE:
75f3123c
SH		 2478 break;
2479 default:
5e1fccc0 2480 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
75f3123c
SH		 2481 return -EPERM;
2482 }
2483
97f8aefb 2484 if (dev->ethtool_ops->begin) {
2485 rc = dev->ethtool_ops->begin(dev);
2486 if (rc < 0)
1da177e4 2487 return rc;
97f8aefb 2488 }
d8a33ac4
SH		 2489 old_features = dev->features;
2490
1da177e4
LT		 2491 switch (ethcmd) {
2492 case ETHTOOL_GSET:
2493 rc = ethtool_get_settings(dev, useraddr);
2494 break;
2495 case ETHTOOL_SSET:
2496 rc = ethtool_set_settings(dev, useraddr);
2497 break;
2498 case ETHTOOL_GDRVINFO:
2499 rc = ethtool_get_drvinfo(dev, useraddr);
1da177e4
LT		 2500 break;
2501 case ETHTOOL_GREGS:
2502 rc = ethtool_get_regs(dev, useraddr);
2503 break;
2504 case ETHTOOL_GWOL:
2505 rc = ethtool_get_wol(dev, useraddr);
2506 break;
2507 case ETHTOOL_SWOL:
2508 rc = ethtool_set_wol(dev, useraddr);
2509 break;
2510 case ETHTOOL_GMSGLVL:
13c99b24
JG		 2511 rc = ethtool_get_value(dev, useraddr, ethcmd,
2512 dev->ethtool_ops->get_msglevel);
1da177e4
LT		 2513 break;
2514 case ETHTOOL_SMSGLVL:
13c99b24
JG		 2515 rc = ethtool_set_value_void(dev, useraddr,
2516 dev->ethtool_ops->set_msglevel);
1da177e4 2517 break;
80f12ecc
YM		 2518 case ETHTOOL_GEEE:
2519 rc = ethtool_get_eee(dev, useraddr);
2520 break;
2521 case ETHTOOL_SEEE:
2522 rc = ethtool_set_eee(dev, useraddr);
2523 break;
1da177e4
LT		 2524 case ETHTOOL_NWAY_RST:
2525 rc = ethtool_nway_reset(dev);
2526 break;
2527 case ETHTOOL_GLINK:
e596e6e4 2528 rc = ethtool_get_link(dev, useraddr);
1da177e4
LT		 2529 break;
2530 case ETHTOOL_GEEPROM:
2531 rc = ethtool_get_eeprom(dev, useraddr);
2532 break;
2533 case ETHTOOL_SEEPROM:
2534 rc = ethtool_set_eeprom(dev, useraddr);
2535 break;
2536 case ETHTOOL_GCOALESCE:
2537 rc = ethtool_get_coalesce(dev, useraddr);
2538 break;
2539 case ETHTOOL_SCOALESCE:
2540 rc = ethtool_set_coalesce(dev, useraddr);
2541 break;
2542 case ETHTOOL_GRINGPARAM:
2543 rc = ethtool_get_ringparam(dev, useraddr);
2544 break;
2545 case ETHTOOL_SRINGPARAM:
2546 rc = ethtool_set_ringparam(dev, useraddr);
2547 break;
2548 case ETHTOOL_GPAUSEPARAM:
2549 rc = ethtool_get_pauseparam(dev, useraddr);
2550 break;
2551 case ETHTOOL_SPAUSEPARAM:
2552 rc = ethtool_set_pauseparam(dev, useraddr);
2553 break;
1da177e4
LT		 2554 case ETHTOOL_TEST:
2555 rc = ethtool_self_test(dev, useraddr);
2556 break;
2557 case ETHTOOL_GSTRINGS:
2558 rc = ethtool_get_strings(dev, useraddr);
2559 break;
2560 case ETHTOOL_PHYS_ID:
2561 rc = ethtool_phys_id(dev, useraddr);
2562 break;
2563 case ETHTOOL_GSTATS:
2564 rc = ethtool_get_stats(dev, useraddr);
2565 break;
a6f9a705
JW		 2566 case ETHTOOL_GPERMADDR:
2567 rc = ethtool_get_perm_addr(dev, useraddr);
2568 break;
3ae7c0b2 2569 case ETHTOOL_GFLAGS:
13c99b24 2570 rc = ethtool_get_value(dev, useraddr, ethcmd,
bc5787c6 2571 __ethtool_get_flags);
3ae7c0b2
JG		 2572 break;
2573 case ETHTOOL_SFLAGS:
da8ac86c 2574 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3ae7c0b2 2575 break;
339bf024 2576 case ETHTOOL_GPFLAGS:
13c99b24
JG		 2577 rc = ethtool_get_value(dev, useraddr, ethcmd,
2578 dev->ethtool_ops->get_priv_flags);
339bf024
JG		 2579 break;
2580 case ETHTOOL_SPFLAGS:
13c99b24
JG		 2581 rc = ethtool_set_value(dev, useraddr,
2582 dev->ethtool_ops->set_priv_flags);
339bf024 2583 break;
0853ad66 2584 case ETHTOOL_GRXFH:
59089d8d
SB		 2585 case ETHTOOL_GRXRINGS:
2586 case ETHTOOL_GRXCLSRLCNT:
2587 case ETHTOOL_GRXCLSRULE:
2588 case ETHTOOL_GRXCLSRLALL:
bf988435 2589 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
0853ad66
SB		 2590 break;
2591 case ETHTOOL_SRXFH:
59089d8d
SB		 2592 case ETHTOOL_SRXCLSRLDEL:
2593 case ETHTOOL_SRXCLSRLINS:
bf988435 2594 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
0853ad66 2595 break;
05c6a8d7
AK		 2596 case ETHTOOL_FLASHDEV:
2597 rc = ethtool_flash_device(dev, useraddr);
2598 break;
d73d3a8c
BH		 2599 case ETHTOOL_RESET:
2600 rc = ethtool_reset(dev, useraddr);
2601 break;
723b2f57
JG		 2602 case ETHTOOL_GSSET_INFO:
2603 rc = ethtool_get_sset_info(dev, useraddr);
2604 break;
a5b6ee29
BH		 2605 case ETHTOOL_GRXFHINDIR:
2606 rc = ethtool_get_rxfh_indir(dev, useraddr);
2607 break;
2608 case ETHTOOL_SRXFHINDIR:
2609 rc = ethtool_set_rxfh_indir(dev, useraddr);
2610 break;
3de0b592
VD		 2611 case ETHTOOL_GRSSH:
2612 rc = ethtool_get_rxfh(dev, useraddr);
2613 break;
2614 case ETHTOOL_SRSSH:
2615 rc = ethtool_set_rxfh(dev, useraddr);
2616 break;
5455c699
MM		 2617 case ETHTOOL_GFEATURES:
2618 rc = ethtool_get_features(dev, useraddr);
2619 break;
2620 case ETHTOOL_SFEATURES:
2621 rc = ethtool_set_features(dev, useraddr);
2622 break;
0a417704 2623 case ETHTOOL_GTXCSUM:
e83d360d 2624 case ETHTOOL_GRXCSUM:
0a417704
MM		 2625 case ETHTOOL_GSG:
2626 case ETHTOOL_GTSO:
2627 case ETHTOOL_GUFO:
2628 case ETHTOOL_GGSO:
2629 case ETHTOOL_GGRO:
2630 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2631 break;
2632 case ETHTOOL_STXCSUM:
e83d360d 2633 case ETHTOOL_SRXCSUM:
0a417704
MM		 2634 case ETHTOOL_SSG:
2635 case ETHTOOL_STSO:
2636 case ETHTOOL_SUFO:
2637 case ETHTOOL_SGSO:
2638 case ETHTOOL_SGRO:
2639 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2640 break;
8b5933c3 2641 case ETHTOOL_GCHANNELS:
2642 rc = ethtool_get_channels(dev, useraddr);
2643 break;
2644 case ETHTOOL_SCHANNELS:
2645 rc = ethtool_set_channels(dev, useraddr);
2646 break;
29dd54b7
AC		 2647 case ETHTOOL_SET_DUMP:
2648 rc = ethtool_set_dump(dev, useraddr);
2649 break;
2650 case ETHTOOL_GET_DUMP_FLAG:
2651 rc = ethtool_get_dump_flag(dev, useraddr);
2652 break;
2653 case ETHTOOL_GET_DUMP_DATA:
2654 rc = ethtool_get_dump_data(dev, useraddr);
2655 break;
c8f3a8c3
RC		 2656 case ETHTOOL_GET_TS_INFO:
2657 rc = ethtool_get_ts_info(dev, useraddr);
2658 break;
41c3cb6d
SH		 2659 case ETHTOOL_GMODULEINFO:
2660 rc = ethtool_get_module_info(dev, useraddr);
2661 break;
2662 case ETHTOOL_GMODULEEEPROM:
2663 rc = ethtool_get_module_eeprom(dev, useraddr);
2664 break;
f0db9b07
GV		 2665 case ETHTOOL_GTUNABLE:
2666 rc = ethtool_get_tunable(dev, useraddr);
2667 break;
2668 case ETHTOOL_STUNABLE:
2669 rc = ethtool_set_tunable(dev, useraddr);
2670 break;
f3a40945
AL		 2671 case ETHTOOL_GPHYSTATS:
2672 rc = ethtool_get_phy_stats(dev, useraddr);
2673 break;
ac2c7ad0
KL		 2674 case ETHTOOL_PERQUEUE:
2675 rc = ethtool_set_per_queue(dev, useraddr);
2676 break;
3f1ac7a7
DD		 2677 case ETHTOOL_GLINKSETTINGS:
2678 rc = ethtool_get_link_ksettings(dev, useraddr);
2679 break;
2680 case ETHTOOL_SLINKSETTINGS:
2681 rc = ethtool_set_link_ksettings(dev, useraddr);
2682 break;
1da177e4 2683 default:
61a44b9c 2684 rc = -EOPNOTSUPP;
1da177e4 2685 }
4ec93edb 2686
e71a4783 2687 if (dev->ethtool_ops->complete)
1da177e4 2688 dev->ethtool_ops->complete(dev);
d8a33ac4
SH		 2689
2690 if (old_features != dev->features)
2691 netdev_features_change(dev);
2692
1da177e4 2693 return rc;
1da177e4 2694}
Linux kernel - Deliverables
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