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Merge tag 'pstore-v5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees...
[mirror_ubuntu-eoan-kernel.git] / net / core / ethtool.c
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
6 * the information ethtool needs.
7 *
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.
12 */
13
14 #include <linux/module.h>
15 #include <linux/types.h>
16 #include <linux/capability.h>
17 #include <linux/errno.h>
18 #include <linux/ethtool.h>
19 #include <linux/netdevice.h>
20 #include <linux/net_tstamp.h>
21 #include <linux/phy.h>
22 #include <linux/bitops.h>
23 #include <linux/uaccess.h>
24 #include <linux/vmalloc.h>
25 #include <linux/sfp.h>
26 #include <linux/slab.h>
27 #include <linux/rtnetlink.h>
28 #include <linux/sched/signal.h>
29 #include <linux/net.h>
30 #include <net/xdp_sock.h>
31
32 /*
33 * Some useful ethtool_ops methods that're device independent.
34 * If we find that all drivers want to do the same thing here,
35 * we can turn these into dev_() function calls.
36 */
37
38 u32 ethtool_op_get_link(struct net_device *dev)
39 {
40 return netif_carrier_ok(dev) ? 1 : 0;
41 }
42 EXPORT_SYMBOL(ethtool_op_get_link);
43
44 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
45 {
46 info->so_timestamping =
47 SOF_TIMESTAMPING_TX_SOFTWARE |
48 SOF_TIMESTAMPING_RX_SOFTWARE |
49 SOF_TIMESTAMPING_SOFTWARE;
50 info->phc_index = -1;
51 return 0;
52 }
53 EXPORT_SYMBOL(ethtool_op_get_ts_info);
54
55 /* Handlers for each ethtool command */
56
57 #define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
58
59 static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
60 [NETIF_F_SG_BIT] = "tx-scatter-gather",
61 [NETIF_F_IP_CSUM_BIT] = "tx-checksum-ipv4",
62 [NETIF_F_HW_CSUM_BIT] = "tx-checksum-ip-generic",
63 [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6",
64 [NETIF_F_HIGHDMA_BIT] = "highdma",
65 [NETIF_F_FRAGLIST_BIT] = "tx-scatter-gather-fraglist",
66 [NETIF_F_HW_VLAN_CTAG_TX_BIT] = "tx-vlan-hw-insert",
67
68 [NETIF_F_HW_VLAN_CTAG_RX_BIT] = "rx-vlan-hw-parse",
69 [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
70 [NETIF_F_HW_VLAN_STAG_TX_BIT] = "tx-vlan-stag-hw-insert",
71 [NETIF_F_HW_VLAN_STAG_RX_BIT] = "rx-vlan-stag-hw-parse",
72 [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
73 [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged",
74 [NETIF_F_GSO_BIT] = "tx-generic-segmentation",
75 [NETIF_F_LLTX_BIT] = "tx-lockless",
76 [NETIF_F_NETNS_LOCAL_BIT] = "netns-local",
77 [NETIF_F_GRO_BIT] = "rx-gro",
78 [NETIF_F_GRO_HW_BIT] = "rx-gro-hw",
79 [NETIF_F_LRO_BIT] = "rx-lro",
80
81 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation",
82 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
83 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
84 [NETIF_F_TSO_MANGLEID_BIT] = "tx-tcp-mangleid-segmentation",
85 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
86 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
87 [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
88 [NETIF_F_GSO_GRE_CSUM_BIT] = "tx-gre-csum-segmentation",
89 [NETIF_F_GSO_IPXIP4_BIT] = "tx-ipxip4-segmentation",
90 [NETIF_F_GSO_IPXIP6_BIT] = "tx-ipxip6-segmentation",
91 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
92 [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
93 [NETIF_F_GSO_PARTIAL_BIT] = "tx-gso-partial",
94 [NETIF_F_GSO_SCTP_BIT] = "tx-sctp-segmentation",
95 [NETIF_F_GSO_ESP_BIT] = "tx-esp-segmentation",
96 [NETIF_F_GSO_UDP_L4_BIT] = "tx-udp-segmentation",
97
98 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
99 [NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
100 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
101 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
102 [NETIF_F_RXHASH_BIT] = "rx-hashing",
103 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
104 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
105 [NETIF_F_LOOPBACK_BIT] = "loopback",
106 [NETIF_F_RXFCS_BIT] = "rx-fcs",
107 [NETIF_F_RXALL_BIT] = "rx-all",
108 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
109 [NETIF_F_HW_TC_BIT] = "hw-tc-offload",
110 [NETIF_F_HW_ESP_BIT] = "esp-hw-offload",
111 [NETIF_F_HW_ESP_TX_CSUM_BIT] = "esp-tx-csum-hw-offload",
112 [NETIF_F_RX_UDP_TUNNEL_PORT_BIT] = "rx-udp_tunnel-port-offload",
113 [NETIF_F_HW_TLS_RECORD_BIT] = "tls-hw-record",
114 [NETIF_F_HW_TLS_TX_BIT] = "tls-hw-tx-offload",
115 [NETIF_F_HW_TLS_RX_BIT] = "tls-hw-rx-offload",
116 };
117
118 static const char
119 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
120 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
121 [ETH_RSS_HASH_XOR_BIT] = "xor",
122 [ETH_RSS_HASH_CRC32_BIT] = "crc32",
123 };
124
125 static const char
126 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
127 [ETHTOOL_ID_UNSPEC] = "Unspec",
128 [ETHTOOL_RX_COPYBREAK] = "rx-copybreak",
129 [ETHTOOL_TX_COPYBREAK] = "tx-copybreak",
130 [ETHTOOL_PFC_PREVENTION_TOUT] = "pfc-prevention-tout",
131 };
132
133 static const char
134 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
135 [ETHTOOL_ID_UNSPEC] = "Unspec",
136 [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
137 };
138
139 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
140 {
141 struct ethtool_gfeatures cmd = {
142 .cmd = ETHTOOL_GFEATURES,
143 .size = ETHTOOL_DEV_FEATURE_WORDS,
144 };
145 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
146 u32 __user *sizeaddr;
147 u32 copy_size;
148 int i;
149
150 /* in case feature bits run out again */
151 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
152
153 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
154 features[i].available = (u32)(dev->hw_features >> (32 * i));
155 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
156 features[i].active = (u32)(dev->features >> (32 * i));
157 features[i].never_changed =
158 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
159 }
160
161 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
162 if (get_user(copy_size, sizeaddr))
163 return -EFAULT;
164
165 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
166 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
167
168 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
169 return -EFAULT;
170 useraddr += sizeof(cmd);
171 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
172 return -EFAULT;
173
174 return 0;
175 }
176
177 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
178 {
179 struct ethtool_sfeatures cmd;
180 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
181 netdev_features_t wanted = 0, valid = 0;
182 int i, ret = 0;
183
184 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
185 return -EFAULT;
186 useraddr += sizeof(cmd);
187
188 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
189 return -EINVAL;
190
191 if (copy_from_user(features, useraddr, sizeof(features)))
192 return -EFAULT;
193
194 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
195 valid |= (netdev_features_t)features[i].valid << (32 * i);
196 wanted |= (netdev_features_t)features[i].requested << (32 * i);
197 }
198
199 if (valid & ~NETIF_F_ETHTOOL_BITS)
200 return -EINVAL;
201
202 if (valid & ~dev->hw_features) {
203 valid &= dev->hw_features;
204 ret |= ETHTOOL_F_UNSUPPORTED;
205 }
206
207 dev->wanted_features &= ~valid;
208 dev->wanted_features |= wanted & valid;
209 __netdev_update_features(dev);
210
211 if ((dev->wanted_features ^ dev->features) & valid)
212 ret |= ETHTOOL_F_WISH;
213
214 return ret;
215 }
216
217 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
218 {
219 const struct ethtool_ops *ops = dev->ethtool_ops;
220
221 if (sset == ETH_SS_FEATURES)
222 return ARRAY_SIZE(netdev_features_strings);
223
224 if (sset == ETH_SS_RSS_HASH_FUNCS)
225 return ARRAY_SIZE(rss_hash_func_strings);
226
227 if (sset == ETH_SS_TUNABLES)
228 return ARRAY_SIZE(tunable_strings);
229
230 if (sset == ETH_SS_PHY_TUNABLES)
231 return ARRAY_SIZE(phy_tunable_strings);
232
233 if (sset == ETH_SS_PHY_STATS && dev->phydev &&
234 !ops->get_ethtool_phy_stats)
235 return phy_ethtool_get_sset_count(dev->phydev);
236
237 if (ops->get_sset_count && ops->get_strings)
238 return ops->get_sset_count(dev, sset);
239 else
240 return -EOPNOTSUPP;
241 }
242
243 static void __ethtool_get_strings(struct net_device *dev,
244 u32 stringset, u8 *data)
245 {
246 const struct ethtool_ops *ops = dev->ethtool_ops;
247
248 if (stringset == ETH_SS_FEATURES)
249 memcpy(data, netdev_features_strings,
250 sizeof(netdev_features_strings));
251 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
252 memcpy(data, rss_hash_func_strings,
253 sizeof(rss_hash_func_strings));
254 else if (stringset == ETH_SS_TUNABLES)
255 memcpy(data, tunable_strings, sizeof(tunable_strings));
256 else if (stringset == ETH_SS_PHY_TUNABLES)
257 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
258 else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
259 !ops->get_ethtool_phy_stats)
260 phy_ethtool_get_strings(dev->phydev, data);
261 else
262 /* ops->get_strings is valid because checked earlier */
263 ops->get_strings(dev, stringset, data);
264 }
265
266 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
267 {
268 /* feature masks of legacy discrete ethtool ops */
269
270 switch (eth_cmd) {
271 case ETHTOOL_GTXCSUM:
272 case ETHTOOL_STXCSUM:
273 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
274 case ETHTOOL_GRXCSUM:
275 case ETHTOOL_SRXCSUM:
276 return NETIF_F_RXCSUM;
277 case ETHTOOL_GSG:
278 case ETHTOOL_SSG:
279 return NETIF_F_SG;
280 case ETHTOOL_GTSO:
281 case ETHTOOL_STSO:
282 return NETIF_F_ALL_TSO;
283 case ETHTOOL_GGSO:
284 case ETHTOOL_SGSO:
285 return NETIF_F_GSO;
286 case ETHTOOL_GGRO:
287 case ETHTOOL_SGRO:
288 return NETIF_F_GRO;
289 default:
290 BUG();
291 }
292 }
293
294 static int ethtool_get_one_feature(struct net_device *dev,
295 char __user *useraddr, u32 ethcmd)
296 {
297 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
298 struct ethtool_value edata = {
299 .cmd = ethcmd,
300 .data = !!(dev->features & mask),
301 };
302
303 if (copy_to_user(useraddr, &edata, sizeof(edata)))
304 return -EFAULT;
305 return 0;
306 }
307
308 static int ethtool_set_one_feature(struct net_device *dev,
309 void __user *useraddr, u32 ethcmd)
310 {
311 struct ethtool_value edata;
312 netdev_features_t mask;
313
314 if (copy_from_user(&edata, useraddr, sizeof(edata)))
315 return -EFAULT;
316
317 mask = ethtool_get_feature_mask(ethcmd);
318 mask &= dev->hw_features;
319 if (!mask)
320 return -EOPNOTSUPP;
321
322 if (edata.data)
323 dev->wanted_features |= mask;
324 else
325 dev->wanted_features &= ~mask;
326
327 __netdev_update_features(dev);
328
329 return 0;
330 }
331
332 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
333 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
334 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
335 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
336 NETIF_F_RXHASH)
337
338 static u32 __ethtool_get_flags(struct net_device *dev)
339 {
340 u32 flags = 0;
341
342 if (dev->features & NETIF_F_LRO)
343 flags |= ETH_FLAG_LRO;
344 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
345 flags |= ETH_FLAG_RXVLAN;
346 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
347 flags |= ETH_FLAG_TXVLAN;
348 if (dev->features & NETIF_F_NTUPLE)
349 flags |= ETH_FLAG_NTUPLE;
350 if (dev->features & NETIF_F_RXHASH)
351 flags |= ETH_FLAG_RXHASH;
352
353 return flags;
354 }
355
356 static int __ethtool_set_flags(struct net_device *dev, u32 data)
357 {
358 netdev_features_t features = 0, changed;
359
360 if (data & ~ETH_ALL_FLAGS)
361 return -EINVAL;
362
363 if (data & ETH_FLAG_LRO)
364 features |= NETIF_F_LRO;
365 if (data & ETH_FLAG_RXVLAN)
366 features |= NETIF_F_HW_VLAN_CTAG_RX;
367 if (data & ETH_FLAG_TXVLAN)
368 features |= NETIF_F_HW_VLAN_CTAG_TX;
369 if (data & ETH_FLAG_NTUPLE)
370 features |= NETIF_F_NTUPLE;
371 if (data & ETH_FLAG_RXHASH)
372 features |= NETIF_F_RXHASH;
373
374 /* allow changing only bits set in hw_features */
375 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
376 if (changed & ~dev->hw_features)
377 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
378
379 dev->wanted_features =
380 (dev->wanted_features & ~changed) | (features & changed);
381
382 __netdev_update_features(dev);
383
384 return 0;
385 }
386
387 /* Given two link masks, AND them together and save the result in dst. */
388 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
389 struct ethtool_link_ksettings *src)
390 {
391 unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
392 unsigned int idx = 0;
393
394 for (; idx < size; idx++) {
395 dst->link_modes.supported[idx] &=
396 src->link_modes.supported[idx];
397 dst->link_modes.advertising[idx] &=
398 src->link_modes.advertising[idx];
399 }
400 }
401 EXPORT_SYMBOL(ethtool_intersect_link_masks);
402
403 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
404 u32 legacy_u32)
405 {
406 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
407 dst[0] = legacy_u32;
408 }
409 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
410
411 /* return false if src had higher bits set. lower bits always updated. */
412 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
413 const unsigned long *src)
414 {
415 bool retval = true;
416
417 /* TODO: following test will soon always be true */
418 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
419 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
420
421 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
422 bitmap_fill(ext, 32);
423 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
424 if (bitmap_intersects(ext, src,
425 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
426 /* src mask goes beyond bit 31 */
427 retval = false;
428 }
429 }
430 *legacy_u32 = src[0];
431 return retval;
432 }
433 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
434
435 /* return false if legacy contained non-0 deprecated fields
436 * maxtxpkt/maxrxpkt. rest of ksettings always updated
437 */
438 static bool
439 convert_legacy_settings_to_link_ksettings(
440 struct ethtool_link_ksettings *link_ksettings,
441 const struct ethtool_cmd *legacy_settings)
442 {
443 bool retval = true;
444
445 memset(link_ksettings, 0, sizeof(*link_ksettings));
446
447 /* This is used to tell users that driver is still using these
448 * deprecated legacy fields, and they should not use
449 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
450 */
451 if (legacy_settings->maxtxpkt ||
452 legacy_settings->maxrxpkt)
453 retval = false;
454
455 ethtool_convert_legacy_u32_to_link_mode(
456 link_ksettings->link_modes.supported,
457 legacy_settings->supported);
458 ethtool_convert_legacy_u32_to_link_mode(
459 link_ksettings->link_modes.advertising,
460 legacy_settings->advertising);
461 ethtool_convert_legacy_u32_to_link_mode(
462 link_ksettings->link_modes.lp_advertising,
463 legacy_settings->lp_advertising);
464 link_ksettings->base.speed
465 = ethtool_cmd_speed(legacy_settings);
466 link_ksettings->base.duplex
467 = legacy_settings->duplex;
468 link_ksettings->base.port
469 = legacy_settings->port;
470 link_ksettings->base.phy_address
471 = legacy_settings->phy_address;
472 link_ksettings->base.autoneg
473 = legacy_settings->autoneg;
474 link_ksettings->base.mdio_support
475 = legacy_settings->mdio_support;
476 link_ksettings->base.eth_tp_mdix
477 = legacy_settings->eth_tp_mdix;
478 link_ksettings->base.eth_tp_mdix_ctrl
479 = legacy_settings->eth_tp_mdix_ctrl;
480 return retval;
481 }
482
483 /* return false if ksettings link modes had higher bits
484 * set. legacy_settings always updated (best effort)
485 */
486 static bool
487 convert_link_ksettings_to_legacy_settings(
488 struct ethtool_cmd *legacy_settings,
489 const struct ethtool_link_ksettings *link_ksettings)
490 {
491 bool retval = true;
492
493 memset(legacy_settings, 0, sizeof(*legacy_settings));
494 /* this also clears the deprecated fields in legacy structure:
495 * __u8 transceiver;
496 * __u32 maxtxpkt;
497 * __u32 maxrxpkt;
498 */
499
500 retval &= ethtool_convert_link_mode_to_legacy_u32(
501 &legacy_settings->supported,
502 link_ksettings->link_modes.supported);
503 retval &= ethtool_convert_link_mode_to_legacy_u32(
504 &legacy_settings->advertising,
505 link_ksettings->link_modes.advertising);
506 retval &= ethtool_convert_link_mode_to_legacy_u32(
507 &legacy_settings->lp_advertising,
508 link_ksettings->link_modes.lp_advertising);
509 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
510 legacy_settings->duplex
511 = link_ksettings->base.duplex;
512 legacy_settings->port
513 = link_ksettings->base.port;
514 legacy_settings->phy_address
515 = link_ksettings->base.phy_address;
516 legacy_settings->autoneg
517 = link_ksettings->base.autoneg;
518 legacy_settings->mdio_support
519 = link_ksettings->base.mdio_support;
520 legacy_settings->eth_tp_mdix
521 = link_ksettings->base.eth_tp_mdix;
522 legacy_settings->eth_tp_mdix_ctrl
523 = link_ksettings->base.eth_tp_mdix_ctrl;
524 legacy_settings->transceiver
525 = link_ksettings->base.transceiver;
526 return retval;
527 }
528
529 /* number of 32-bit words to store the user's link mode bitmaps */
530 #define __ETHTOOL_LINK_MODE_MASK_NU32 \
531 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
532
533 /* layout of the struct passed from/to userland */
534 struct ethtool_link_usettings {
535 struct ethtool_link_settings base;
536 struct {
537 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
538 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
539 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
540 } link_modes;
541 };
542
543 /* Internal kernel helper to query a device ethtool_link_settings. */
544 int __ethtool_get_link_ksettings(struct net_device *dev,
545 struct ethtool_link_ksettings *link_ksettings)
546 {
547 ASSERT_RTNL();
548
549 if (!dev->ethtool_ops->get_link_ksettings)
550 return -EOPNOTSUPP;
551
552 memset(link_ksettings, 0, sizeof(*link_ksettings));
553 return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
554 }
555 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
556
557 /* convert ethtool_link_usettings in user space to a kernel internal
558 * ethtool_link_ksettings. return 0 on success, errno on error.
559 */
560 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
561 const void __user *from)
562 {
563 struct ethtool_link_usettings link_usettings;
564
565 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
566 return -EFAULT;
567
568 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
569 bitmap_from_arr32(to->link_modes.supported,
570 link_usettings.link_modes.supported,
571 __ETHTOOL_LINK_MODE_MASK_NBITS);
572 bitmap_from_arr32(to->link_modes.advertising,
573 link_usettings.link_modes.advertising,
574 __ETHTOOL_LINK_MODE_MASK_NBITS);
575 bitmap_from_arr32(to->link_modes.lp_advertising,
576 link_usettings.link_modes.lp_advertising,
577 __ETHTOOL_LINK_MODE_MASK_NBITS);
578
579 return 0;
580 }
581
582 /* convert a kernel internal ethtool_link_ksettings to
583 * ethtool_link_usettings in user space. return 0 on success, errno on
584 * error.
585 */
586 static int
587 store_link_ksettings_for_user(void __user *to,
588 const struct ethtool_link_ksettings *from)
589 {
590 struct ethtool_link_usettings link_usettings;
591
592 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
593 bitmap_to_arr32(link_usettings.link_modes.supported,
594 from->link_modes.supported,
595 __ETHTOOL_LINK_MODE_MASK_NBITS);
596 bitmap_to_arr32(link_usettings.link_modes.advertising,
597 from->link_modes.advertising,
598 __ETHTOOL_LINK_MODE_MASK_NBITS);
599 bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
600 from->link_modes.lp_advertising,
601 __ETHTOOL_LINK_MODE_MASK_NBITS);
602
603 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
604 return -EFAULT;
605
606 return 0;
607 }
608
609 /* Query device for its ethtool_link_settings. */
610 static int ethtool_get_link_ksettings(struct net_device *dev,
611 void __user *useraddr)
612 {
613 int err = 0;
614 struct ethtool_link_ksettings link_ksettings;
615
616 ASSERT_RTNL();
617 if (!dev->ethtool_ops->get_link_ksettings)
618 return -EOPNOTSUPP;
619
620 /* handle bitmap nbits handshake */
621 if (copy_from_user(&link_ksettings.base, useraddr,
622 sizeof(link_ksettings.base)))
623 return -EFAULT;
624
625 if (__ETHTOOL_LINK_MODE_MASK_NU32
626 != link_ksettings.base.link_mode_masks_nwords) {
627 /* wrong link mode nbits requested */
628 memset(&link_ksettings, 0, sizeof(link_ksettings));
629 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
630 /* send back number of words required as negative val */
631 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
632 "need too many bits for link modes!");
633 link_ksettings.base.link_mode_masks_nwords
634 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
635
636 /* copy the base fields back to user, not the link
637 * mode bitmaps
638 */
639 if (copy_to_user(useraddr, &link_ksettings.base,
640 sizeof(link_ksettings.base)))
641 return -EFAULT;
642
643 return 0;
644 }
645
646 /* handshake successful: user/kernel agree on
647 * link_mode_masks_nwords
648 */
649
650 memset(&link_ksettings, 0, sizeof(link_ksettings));
651 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
652 if (err < 0)
653 return err;
654
655 /* make sure we tell the right values to user */
656 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
657 link_ksettings.base.link_mode_masks_nwords
658 = __ETHTOOL_LINK_MODE_MASK_NU32;
659
660 return store_link_ksettings_for_user(useraddr, &link_ksettings);
661 }
662
663 /* Update device ethtool_link_settings. */
664 static int ethtool_set_link_ksettings(struct net_device *dev,
665 void __user *useraddr)
666 {
667 int err;
668 struct ethtool_link_ksettings link_ksettings;
669
670 ASSERT_RTNL();
671
672 if (!dev->ethtool_ops->set_link_ksettings)
673 return -EOPNOTSUPP;
674
675 /* make sure nbits field has expected value */
676 if (copy_from_user(&link_ksettings.base, useraddr,
677 sizeof(link_ksettings.base)))
678 return -EFAULT;
679
680 if (__ETHTOOL_LINK_MODE_MASK_NU32
681 != link_ksettings.base.link_mode_masks_nwords)
682 return -EINVAL;
683
684 /* copy the whole structure, now that we know it has expected
685 * format
686 */
687 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
688 if (err)
689 return err;
690
691 /* re-check nwords field, just in case */
692 if (__ETHTOOL_LINK_MODE_MASK_NU32
693 != link_ksettings.base.link_mode_masks_nwords)
694 return -EINVAL;
695
696 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
697 }
698
699 /* Query device for its ethtool_cmd settings.
700 *
701 * Backward compatibility note: for compatibility with legacy ethtool, this is
702 * now implemented via get_link_ksettings. When driver reports higher link mode
703 * bits, a kernel warning is logged once (with name of 1st driver/device) to
704 * recommend user to upgrade ethtool, but the command is successful (only the
705 * lower link mode bits reported back to user). Deprecated fields from
706 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
707 */
708 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
709 {
710 struct ethtool_link_ksettings link_ksettings;
711 struct ethtool_cmd cmd;
712 int err;
713
714 ASSERT_RTNL();
715 if (!dev->ethtool_ops->get_link_ksettings)
716 return -EOPNOTSUPP;
717
718 memset(&link_ksettings, 0, sizeof(link_ksettings));
719 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
720 if (err < 0)
721 return err;
722 convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
723
724 /* send a sensible cmd tag back to user */
725 cmd.cmd = ETHTOOL_GSET;
726
727 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
728 return -EFAULT;
729
730 return 0;
731 }
732
733 /* Update device link settings with given ethtool_cmd.
734 *
735 * Backward compatibility note: for compatibility with legacy ethtool, this is
736 * now always implemented via set_link_settings. When user's request updates
737 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
738 * warning is logged once (with name of 1st driver/device) to recommend user to
739 * upgrade ethtool, and the request is rejected.
740 */
741 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
742 {
743 struct ethtool_link_ksettings link_ksettings;
744 struct ethtool_cmd cmd;
745
746 ASSERT_RTNL();
747
748 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
749 return -EFAULT;
750 if (!dev->ethtool_ops->set_link_ksettings)
751 return -EOPNOTSUPP;
752
753 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
754 return -EINVAL;
755 link_ksettings.base.link_mode_masks_nwords =
756 __ETHTOOL_LINK_MODE_MASK_NU32;
757 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
758 }
759
760 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
761 void __user *useraddr)
762 {
763 struct ethtool_drvinfo info;
764 const struct ethtool_ops *ops = dev->ethtool_ops;
765
766 memset(&info, 0, sizeof(info));
767 info.cmd = ETHTOOL_GDRVINFO;
768 if (ops->get_drvinfo) {
769 ops->get_drvinfo(dev, &info);
770 } else if (dev->dev.parent && dev->dev.parent->driver) {
771 strlcpy(info.bus_info, dev_name(dev->dev.parent),
772 sizeof(info.bus_info));
773 strlcpy(info.driver, dev->dev.parent->driver->name,
774 sizeof(info.driver));
775 } else {
776 return -EOPNOTSUPP;
777 }
778
779 /*
780 * this method of obtaining string set info is deprecated;
781 * Use ETHTOOL_GSSET_INFO instead.
782 */
783 if (ops->get_sset_count) {
784 int rc;
785
786 rc = ops->get_sset_count(dev, ETH_SS_TEST);
787 if (rc >= 0)
788 info.testinfo_len = rc;
789 rc = ops->get_sset_count(dev, ETH_SS_STATS);
790 if (rc >= 0)
791 info.n_stats = rc;
792 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
793 if (rc >= 0)
794 info.n_priv_flags = rc;
795 }
796 if (ops->get_regs_len) {
797 int ret = ops->get_regs_len(dev);
798
799 if (ret > 0)
800 info.regdump_len = ret;
801 }
802
803 if (ops->get_eeprom_len)
804 info.eedump_len = ops->get_eeprom_len(dev);
805
806 if (copy_to_user(useraddr, &info, sizeof(info)))
807 return -EFAULT;
808 return 0;
809 }
810
811 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
812 void __user *useraddr)
813 {
814 struct ethtool_sset_info info;
815 u64 sset_mask;
816 int i, idx = 0, n_bits = 0, ret, rc;
817 u32 *info_buf = NULL;
818
819 if (copy_from_user(&info, useraddr, sizeof(info)))
820 return -EFAULT;
821
822 /* store copy of mask, because we zero struct later on */
823 sset_mask = info.sset_mask;
824 if (!sset_mask)
825 return 0;
826
827 /* calculate size of return buffer */
828 n_bits = hweight64(sset_mask);
829
830 memset(&info, 0, sizeof(info));
831 info.cmd = ETHTOOL_GSSET_INFO;
832
833 info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
834 if (!info_buf)
835 return -ENOMEM;
836
837 /*
838 * fill return buffer based on input bitmask and successful
839 * get_sset_count return
840 */
841 for (i = 0; i < 64; i++) {
842 if (!(sset_mask & (1ULL << i)))
843 continue;
844
845 rc = __ethtool_get_sset_count(dev, i);
846 if (rc >= 0) {
847 info.sset_mask |= (1ULL << i);
848 info_buf[idx++] = rc;
849 }
850 }
851
852 ret = -EFAULT;
853 if (copy_to_user(useraddr, &info, sizeof(info)))
854 goto out;
855
856 useraddr += offsetof(struct ethtool_sset_info, data);
857 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
858 goto out;
859
860 ret = 0;
861
862 out:
863 kfree(info_buf);
864 return ret;
865 }
866
867 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
868 u32 cmd, void __user *useraddr)
869 {
870 struct ethtool_rxnfc info;
871 size_t info_size = sizeof(info);
872 int rc;
873
874 if (!dev->ethtool_ops->set_rxnfc)
875 return -EOPNOTSUPP;
876
877 /* struct ethtool_rxnfc was originally defined for
878 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
879 * members. User-space might still be using that
880 * definition. */
881 if (cmd == ETHTOOL_SRXFH)
882 info_size = (offsetof(struct ethtool_rxnfc, data) +
883 sizeof(info.data));
884
885 if (copy_from_user(&info, useraddr, info_size))
886 return -EFAULT;
887
888 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
889 if (rc)
890 return rc;
891
892 if (cmd == ETHTOOL_SRXCLSRLINS &&
893 copy_to_user(useraddr, &info, info_size))
894 return -EFAULT;
895
896 return 0;
897 }
898
899 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
900 u32 cmd, void __user *useraddr)
901 {
902 struct ethtool_rxnfc info;
903 size_t info_size = sizeof(info);
904 const struct ethtool_ops *ops = dev->ethtool_ops;
905 int ret;
906 void *rule_buf = NULL;
907
908 if (!ops->get_rxnfc)
909 return -EOPNOTSUPP;
910
911 /* struct ethtool_rxnfc was originally defined for
912 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
913 * members. User-space might still be using that
914 * definition. */
915 if (cmd == ETHTOOL_GRXFH)
916 info_size = (offsetof(struct ethtool_rxnfc, data) +
917 sizeof(info.data));
918
919 if (copy_from_user(&info, useraddr, info_size))
920 return -EFAULT;
921
922 /* If FLOW_RSS was requested then user-space must be using the
923 * new definition, as FLOW_RSS is newer.
924 */
925 if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
926 info_size = sizeof(info);
927 if (copy_from_user(&info, useraddr, info_size))
928 return -EFAULT;
929 /* Since malicious users may modify the original data,
930 * we need to check whether FLOW_RSS is still requested.
931 */
932 if (!(info.flow_type & FLOW_RSS))
933 return -EINVAL;
934 }
935
936 if (info.cmd != cmd)
937 return -EINVAL;
938
939 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
940 if (info.rule_cnt > 0) {
941 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
942 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
943 GFP_USER);
944 if (!rule_buf)
945 return -ENOMEM;
946 }
947 }
948
949 ret = ops->get_rxnfc(dev, &info, rule_buf);
950 if (ret < 0)
951 goto err_out;
952
953 ret = -EFAULT;
954 if (copy_to_user(useraddr, &info, info_size))
955 goto err_out;
956
957 if (rule_buf) {
958 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
959 if (copy_to_user(useraddr, rule_buf,
960 info.rule_cnt * sizeof(u32)))
961 goto err_out;
962 }
963 ret = 0;
964
965 err_out:
966 kfree(rule_buf);
967
968 return ret;
969 }
970
971 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
972 struct ethtool_rxnfc *rx_rings,
973 u32 size)
974 {
975 int i;
976
977 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
978 return -EFAULT;
979
980 /* Validate ring indices */
981 for (i = 0; i < size; i++)
982 if (indir[i] >= rx_rings->data)
983 return -EINVAL;
984
985 return 0;
986 }
987
988 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
989
990 void netdev_rss_key_fill(void *buffer, size_t len)
991 {
992 BUG_ON(len > sizeof(netdev_rss_key));
993 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
994 memcpy(buffer, netdev_rss_key, len);
995 }
996 EXPORT_SYMBOL(netdev_rss_key_fill);
997
998 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
999 {
1000 u32 dev_size, current_max = 0;
1001 u32 *indir;
1002 int ret;
1003
1004 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1005 !dev->ethtool_ops->get_rxfh)
1006 return -EOPNOTSUPP;
1007 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1008 if (dev_size == 0)
1009 return -EOPNOTSUPP;
1010
1011 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1012 if (!indir)
1013 return -ENOMEM;
1014
1015 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1016 if (ret)
1017 goto out;
1018
1019 while (dev_size--)
1020 current_max = max(current_max, indir[dev_size]);
1021
1022 *max = current_max;
1023
1024 out:
1025 kfree(indir);
1026 return ret;
1027 }
1028
1029 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1030 void __user *useraddr)
1031 {
1032 u32 user_size, dev_size;
1033 u32 *indir;
1034 int ret;
1035
1036 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1037 !dev->ethtool_ops->get_rxfh)
1038 return -EOPNOTSUPP;
1039 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1040 if (dev_size == 0)
1041 return -EOPNOTSUPP;
1042
1043 if (copy_from_user(&user_size,
1044 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1045 sizeof(user_size)))
1046 return -EFAULT;
1047
1048 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1049 &dev_size, sizeof(dev_size)))
1050 return -EFAULT;
1051
1052 /* If the user buffer size is 0, this is just a query for the
1053 * device table size. Otherwise, if it's smaller than the
1054 * device table size it's an error.
1055 */
1056 if (user_size < dev_size)
1057 return user_size == 0 ? 0 : -EINVAL;
1058
1059 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1060 if (!indir)
1061 return -ENOMEM;
1062
1063 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1064 if (ret)
1065 goto out;
1066
1067 if (copy_to_user(useraddr +
1068 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1069 indir, dev_size * sizeof(indir[0])))
1070 ret = -EFAULT;
1071
1072 out:
1073 kfree(indir);
1074 return ret;
1075 }
1076
1077 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1078 void __user *useraddr)
1079 {
1080 struct ethtool_rxnfc rx_rings;
1081 u32 user_size, dev_size, i;
1082 u32 *indir;
1083 const struct ethtool_ops *ops = dev->ethtool_ops;
1084 int ret;
1085 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1086
1087 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1088 !ops->get_rxnfc)
1089 return -EOPNOTSUPP;
1090
1091 dev_size = ops->get_rxfh_indir_size(dev);
1092 if (dev_size == 0)
1093 return -EOPNOTSUPP;
1094
1095 if (copy_from_user(&user_size,
1096 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1097 sizeof(user_size)))
1098 return -EFAULT;
1099
1100 if (user_size != 0 && user_size != dev_size)
1101 return -EINVAL;
1102
1103 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1104 if (!indir)
1105 return -ENOMEM;
1106
1107 rx_rings.cmd = ETHTOOL_GRXRINGS;
1108 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1109 if (ret)
1110 goto out;
1111
1112 if (user_size == 0) {
1113 for (i = 0; i < dev_size; i++)
1114 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1115 } else {
1116 ret = ethtool_copy_validate_indir(indir,
1117 useraddr + ringidx_offset,
1118 &rx_rings,
1119 dev_size);
1120 if (ret)
1121 goto out;
1122 }
1123
1124 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1125 if (ret)
1126 goto out;
1127
1128 /* indicate whether rxfh was set to default */
1129 if (user_size == 0)
1130 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1131 else
1132 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1133
1134 out:
1135 kfree(indir);
1136 return ret;
1137 }
1138
1139 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1140 void __user *useraddr)
1141 {
1142 int ret;
1143 const struct ethtool_ops *ops = dev->ethtool_ops;
1144 u32 user_indir_size, user_key_size;
1145 u32 dev_indir_size = 0, dev_key_size = 0;
1146 struct ethtool_rxfh rxfh;
1147 u32 total_size;
1148 u32 indir_bytes;
1149 u32 *indir = NULL;
1150 u8 dev_hfunc = 0;
1151 u8 *hkey = NULL;
1152 u8 *rss_config;
1153
1154 if (!ops->get_rxfh)
1155 return -EOPNOTSUPP;
1156
1157 if (ops->get_rxfh_indir_size)
1158 dev_indir_size = ops->get_rxfh_indir_size(dev);
1159 if (ops->get_rxfh_key_size)
1160 dev_key_size = ops->get_rxfh_key_size(dev);
1161
1162 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1163 return -EFAULT;
1164 user_indir_size = rxfh.indir_size;
1165 user_key_size = rxfh.key_size;
1166
1167 /* Check that reserved fields are 0 for now */
1168 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1169 return -EINVAL;
1170 /* Most drivers don't handle rss_context, check it's 0 as well */
1171 if (rxfh.rss_context && !ops->get_rxfh_context)
1172 return -EOPNOTSUPP;
1173
1174 rxfh.indir_size = dev_indir_size;
1175 rxfh.key_size = dev_key_size;
1176 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1177 return -EFAULT;
1178
1179 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1180 (user_key_size && (user_key_size != dev_key_size)))
1181 return -EINVAL;
1182
1183 indir_bytes = user_indir_size * sizeof(indir[0]);
1184 total_size = indir_bytes + user_key_size;
1185 rss_config = kzalloc(total_size, GFP_USER);
1186 if (!rss_config)
1187 return -ENOMEM;
1188
1189 if (user_indir_size)
1190 indir = (u32 *)rss_config;
1191
1192 if (user_key_size)
1193 hkey = rss_config + indir_bytes;
1194
1195 if (rxfh.rss_context)
1196 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1197 &dev_hfunc,
1198 rxfh.rss_context);
1199 else
1200 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1201 if (ret)
1202 goto out;
1203
1204 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1205 &dev_hfunc, sizeof(rxfh.hfunc))) {
1206 ret = -EFAULT;
1207 } else if (copy_to_user(useraddr +
1208 offsetof(struct ethtool_rxfh, rss_config[0]),
1209 rss_config, total_size)) {
1210 ret = -EFAULT;
1211 }
1212 out:
1213 kfree(rss_config);
1214
1215 return ret;
1216 }
1217
1218 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1219 void __user *useraddr)
1220 {
1221 int ret;
1222 const struct ethtool_ops *ops = dev->ethtool_ops;
1223 struct ethtool_rxnfc rx_rings;
1224 struct ethtool_rxfh rxfh;
1225 u32 dev_indir_size = 0, dev_key_size = 0, i;
1226 u32 *indir = NULL, indir_bytes = 0;
1227 u8 *hkey = NULL;
1228 u8 *rss_config;
1229 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1230 bool delete = false;
1231
1232 if (!ops->get_rxnfc || !ops->set_rxfh)
1233 return -EOPNOTSUPP;
1234
1235 if (ops->get_rxfh_indir_size)
1236 dev_indir_size = ops->get_rxfh_indir_size(dev);
1237 if (ops->get_rxfh_key_size)
1238 dev_key_size = ops->get_rxfh_key_size(dev);
1239
1240 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1241 return -EFAULT;
1242
1243 /* Check that reserved fields are 0 for now */
1244 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1245 return -EINVAL;
1246 /* Most drivers don't handle rss_context, check it's 0 as well */
1247 if (rxfh.rss_context && !ops->set_rxfh_context)
1248 return -EOPNOTSUPP;
1249
1250 /* If either indir, hash key or function is valid, proceed further.
1251 * Must request at least one change: indir size, hash key or function.
1252 */
1253 if ((rxfh.indir_size &&
1254 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1255 rxfh.indir_size != dev_indir_size) ||
1256 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1257 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1258 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1259 return -EINVAL;
1260
1261 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1262 indir_bytes = dev_indir_size * sizeof(indir[0]);
1263
1264 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1265 if (!rss_config)
1266 return -ENOMEM;
1267
1268 rx_rings.cmd = ETHTOOL_GRXRINGS;
1269 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1270 if (ret)
1271 goto out;
1272
1273 /* rxfh.indir_size == 0 means reset the indir table to default (master
1274 * context) or delete the context (other RSS contexts).
1275 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1276 */
1277 if (rxfh.indir_size &&
1278 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1279 indir = (u32 *)rss_config;
1280 ret = ethtool_copy_validate_indir(indir,
1281 useraddr + rss_cfg_offset,
1282 &rx_rings,
1283 rxfh.indir_size);
1284 if (ret)
1285 goto out;
1286 } else if (rxfh.indir_size == 0) {
1287 if (rxfh.rss_context == 0) {
1288 indir = (u32 *)rss_config;
1289 for (i = 0; i < dev_indir_size; i++)
1290 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1291 } else {
1292 delete = true;
1293 }
1294 }
1295
1296 if (rxfh.key_size) {
1297 hkey = rss_config + indir_bytes;
1298 if (copy_from_user(hkey,
1299 useraddr + rss_cfg_offset + indir_bytes,
1300 rxfh.key_size)) {
1301 ret = -EFAULT;
1302 goto out;
1303 }
1304 }
1305
1306 if (rxfh.rss_context)
1307 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1308 &rxfh.rss_context, delete);
1309 else
1310 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1311 if (ret)
1312 goto out;
1313
1314 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1315 &rxfh.rss_context, sizeof(rxfh.rss_context)))
1316 ret = -EFAULT;
1317
1318 if (!rxfh.rss_context) {
1319 /* indicate whether rxfh was set to default */
1320 if (rxfh.indir_size == 0)
1321 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1322 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1323 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1324 }
1325
1326 out:
1327 kfree(rss_config);
1328 return ret;
1329 }
1330
1331 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1332 {
1333 struct ethtool_regs regs;
1334 const struct ethtool_ops *ops = dev->ethtool_ops;
1335 void *regbuf;
1336 int reglen, ret;
1337
1338 if (!ops->get_regs || !ops->get_regs_len)
1339 return -EOPNOTSUPP;
1340
1341 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1342 return -EFAULT;
1343
1344 reglen = ops->get_regs_len(dev);
1345 if (reglen <= 0)
1346 return reglen;
1347
1348 if (regs.len > reglen)
1349 regs.len = reglen;
1350
1351 regbuf = NULL;
1352 if (reglen) {
1353 regbuf = vzalloc(reglen);
1354 if (!regbuf)
1355 return -ENOMEM;
1356 }
1357
1358 ops->get_regs(dev, &regs, regbuf);
1359
1360 ret = -EFAULT;
1361 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1362 goto out;
1363 useraddr += offsetof(struct ethtool_regs, data);
1364 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1365 goto out;
1366 ret = 0;
1367
1368 out:
1369 vfree(regbuf);
1370 return ret;
1371 }
1372
1373 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1374 {
1375 struct ethtool_value reset;
1376 int ret;
1377
1378 if (!dev->ethtool_ops->reset)
1379 return -EOPNOTSUPP;
1380
1381 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1382 return -EFAULT;
1383
1384 ret = dev->ethtool_ops->reset(dev, &reset.data);
1385 if (ret)
1386 return ret;
1387
1388 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1389 return -EFAULT;
1390 return 0;
1391 }
1392
1393 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1394 {
1395 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1396
1397 if (!dev->ethtool_ops->get_wol)
1398 return -EOPNOTSUPP;
1399
1400 dev->ethtool_ops->get_wol(dev, &wol);
1401
1402 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1403 return -EFAULT;
1404 return 0;
1405 }
1406
1407 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1408 {
1409 struct ethtool_wolinfo wol;
1410 int ret;
1411
1412 if (!dev->ethtool_ops->set_wol)
1413 return -EOPNOTSUPP;
1414
1415 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1416 return -EFAULT;
1417
1418 ret = dev->ethtool_ops->set_wol(dev, &wol);
1419 if (ret)
1420 return ret;
1421
1422 dev->wol_enabled = !!wol.wolopts;
1423
1424 return 0;
1425 }
1426
1427 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1428 {
1429 struct ethtool_eee edata;
1430 int rc;
1431
1432 if (!dev->ethtool_ops->get_eee)
1433 return -EOPNOTSUPP;
1434
1435 memset(&edata, 0, sizeof(struct ethtool_eee));
1436 edata.cmd = ETHTOOL_GEEE;
1437 rc = dev->ethtool_ops->get_eee(dev, &edata);
1438
1439 if (rc)
1440 return rc;
1441
1442 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1443 return -EFAULT;
1444
1445 return 0;
1446 }
1447
1448 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1449 {
1450 struct ethtool_eee edata;
1451
1452 if (!dev->ethtool_ops->set_eee)
1453 return -EOPNOTSUPP;
1454
1455 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1456 return -EFAULT;
1457
1458 return dev->ethtool_ops->set_eee(dev, &edata);
1459 }
1460
1461 static int ethtool_nway_reset(struct net_device *dev)
1462 {
1463 if (!dev->ethtool_ops->nway_reset)
1464 return -EOPNOTSUPP;
1465
1466 return dev->ethtool_ops->nway_reset(dev);
1467 }
1468
1469 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1470 {
1471 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1472
1473 if (!dev->ethtool_ops->get_link)
1474 return -EOPNOTSUPP;
1475
1476 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1477
1478 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1479 return -EFAULT;
1480 return 0;
1481 }
1482
1483 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1484 int (*getter)(struct net_device *,
1485 struct ethtool_eeprom *, u8 *),
1486 u32 total_len)
1487 {
1488 struct ethtool_eeprom eeprom;
1489 void __user *userbuf = useraddr + sizeof(eeprom);
1490 u32 bytes_remaining;
1491 u8 *data;
1492 int ret = 0;
1493
1494 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1495 return -EFAULT;
1496
1497 /* Check for wrap and zero */
1498 if (eeprom.offset + eeprom.len <= eeprom.offset)
1499 return -EINVAL;
1500
1501 /* Check for exceeding total eeprom len */
1502 if (eeprom.offset + eeprom.len > total_len)
1503 return -EINVAL;
1504
1505 data = kmalloc(PAGE_SIZE, GFP_USER);
1506 if (!data)
1507 return -ENOMEM;
1508
1509 bytes_remaining = eeprom.len;
1510 while (bytes_remaining > 0) {
1511 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1512
1513 ret = getter(dev, &eeprom, data);
1514 if (ret)
1515 break;
1516 if (copy_to_user(userbuf, data, eeprom.len)) {
1517 ret = -EFAULT;
1518 break;
1519 }
1520 userbuf += eeprom.len;
1521 eeprom.offset += eeprom.len;
1522 bytes_remaining -= eeprom.len;
1523 }
1524
1525 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1526 eeprom.offset -= eeprom.len;
1527 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1528 ret = -EFAULT;
1529
1530 kfree(data);
1531 return ret;
1532 }
1533
1534 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1535 {
1536 const struct ethtool_ops *ops = dev->ethtool_ops;
1537
1538 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1539 !ops->get_eeprom_len(dev))
1540 return -EOPNOTSUPP;
1541
1542 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1543 ops->get_eeprom_len(dev));
1544 }
1545
1546 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1547 {
1548 struct ethtool_eeprom eeprom;
1549 const struct ethtool_ops *ops = dev->ethtool_ops;
1550 void __user *userbuf = useraddr + sizeof(eeprom);
1551 u32 bytes_remaining;
1552 u8 *data;
1553 int ret = 0;
1554
1555 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1556 !ops->get_eeprom_len(dev))
1557 return -EOPNOTSUPP;
1558
1559 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1560 return -EFAULT;
1561
1562 /* Check for wrap and zero */
1563 if (eeprom.offset + eeprom.len <= eeprom.offset)
1564 return -EINVAL;
1565
1566 /* Check for exceeding total eeprom len */
1567 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1568 return -EINVAL;
1569
1570 data = kmalloc(PAGE_SIZE, GFP_USER);
1571 if (!data)
1572 return -ENOMEM;
1573
1574 bytes_remaining = eeprom.len;
1575 while (bytes_remaining > 0) {
1576 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1577
1578 if (copy_from_user(data, userbuf, eeprom.len)) {
1579 ret = -EFAULT;
1580 break;
1581 }
1582 ret = ops->set_eeprom(dev, &eeprom, data);
1583 if (ret)
1584 break;
1585 userbuf += eeprom.len;
1586 eeprom.offset += eeprom.len;
1587 bytes_remaining -= eeprom.len;
1588 }
1589
1590 kfree(data);
1591 return ret;
1592 }
1593
1594 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1595 void __user *useraddr)
1596 {
1597 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1598
1599 if (!dev->ethtool_ops->get_coalesce)
1600 return -EOPNOTSUPP;
1601
1602 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1603
1604 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1605 return -EFAULT;
1606 return 0;
1607 }
1608
1609 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1610 void __user *useraddr)
1611 {
1612 struct ethtool_coalesce coalesce;
1613
1614 if (!dev->ethtool_ops->set_coalesce)
1615 return -EOPNOTSUPP;
1616
1617 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1618 return -EFAULT;
1619
1620 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1621 }
1622
1623 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1624 {
1625 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1626
1627 if (!dev->ethtool_ops->get_ringparam)
1628 return -EOPNOTSUPP;
1629
1630 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1631
1632 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1633 return -EFAULT;
1634 return 0;
1635 }
1636
1637 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1638 {
1639 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1640
1641 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1642 return -EOPNOTSUPP;
1643
1644 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1645 return -EFAULT;
1646
1647 dev->ethtool_ops->get_ringparam(dev, &max);
1648
1649 /* ensure new ring parameters are within the maximums */
1650 if (ringparam.rx_pending > max.rx_max_pending ||
1651 ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1652 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1653 ringparam.tx_pending > max.tx_max_pending)
1654 return -EINVAL;
1655
1656 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1657 }
1658
1659 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1660 void __user *useraddr)
1661 {
1662 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1663
1664 if (!dev->ethtool_ops->get_channels)
1665 return -EOPNOTSUPP;
1666
1667 dev->ethtool_ops->get_channels(dev, &channels);
1668
1669 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1670 return -EFAULT;
1671 return 0;
1672 }
1673
1674 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1675 void __user *useraddr)
1676 {
1677 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1678 u16 from_channel, to_channel;
1679 u32 max_rx_in_use = 0;
1680 unsigned int i;
1681
1682 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1683 return -EOPNOTSUPP;
1684
1685 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1686 return -EFAULT;
1687
1688 dev->ethtool_ops->get_channels(dev, &curr);
1689
1690 /* ensure new counts are within the maximums */
1691 if (channels.rx_count > curr.max_rx ||
1692 channels.tx_count > curr.max_tx ||
1693 channels.combined_count > curr.max_combined ||
1694 channels.other_count > curr.max_other)
1695 return -EINVAL;
1696
1697 /* ensure the new Rx count fits within the configured Rx flow
1698 * indirection table settings */
1699 if (netif_is_rxfh_configured(dev) &&
1700 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1701 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1702 return -EINVAL;
1703
1704 /* Disabling channels, query zero-copy AF_XDP sockets */
1705 from_channel = channels.combined_count +
1706 min(channels.rx_count, channels.tx_count);
1707 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1708 for (i = from_channel; i < to_channel; i++)
1709 if (xdp_get_umem_from_qid(dev, i))
1710 return -EINVAL;
1711
1712 return dev->ethtool_ops->set_channels(dev, &channels);
1713 }
1714
1715 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1716 {
1717 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1718
1719 if (!dev->ethtool_ops->get_pauseparam)
1720 return -EOPNOTSUPP;
1721
1722 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1723
1724 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1725 return -EFAULT;
1726 return 0;
1727 }
1728
1729 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1730 {
1731 struct ethtool_pauseparam pauseparam;
1732
1733 if (!dev->ethtool_ops->set_pauseparam)
1734 return -EOPNOTSUPP;
1735
1736 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1737 return -EFAULT;
1738
1739 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1740 }
1741
1742 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1743 {
1744 struct ethtool_test test;
1745 const struct ethtool_ops *ops = dev->ethtool_ops;
1746 u64 *data;
1747 int ret, test_len;
1748
1749 if (!ops->self_test || !ops->get_sset_count)
1750 return -EOPNOTSUPP;
1751
1752 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1753 if (test_len < 0)
1754 return test_len;
1755 WARN_ON(test_len == 0);
1756
1757 if (copy_from_user(&test, useraddr, sizeof(test)))
1758 return -EFAULT;
1759
1760 test.len = test_len;
1761 data = kmalloc_array(test_len, sizeof(u64), GFP_USER);
1762 if (!data)
1763 return -ENOMEM;
1764
1765 ops->self_test(dev, &test, data);
1766
1767 ret = -EFAULT;
1768 if (copy_to_user(useraddr, &test, sizeof(test)))
1769 goto out;
1770 useraddr += sizeof(test);
1771 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1772 goto out;
1773 ret = 0;
1774
1775 out:
1776 kfree(data);
1777 return ret;
1778 }
1779
1780 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1781 {
1782 struct ethtool_gstrings gstrings;
1783 u8 *data;
1784 int ret;
1785
1786 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1787 return -EFAULT;
1788
1789 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1790 if (ret < 0)
1791 return ret;
1792 if (ret > S32_MAX / ETH_GSTRING_LEN)
1793 return -ENOMEM;
1794 WARN_ON_ONCE(!ret);
1795
1796 gstrings.len = ret;
1797 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1798 if (gstrings.len && !data)
1799 return -ENOMEM;
1800
1801 __ethtool_get_strings(dev, gstrings.string_set, data);
1802
1803 ret = -EFAULT;
1804 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1805 goto out;
1806 useraddr += sizeof(gstrings);
1807 if (gstrings.len &&
1808 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1809 goto out;
1810 ret = 0;
1811
1812 out:
1813 vfree(data);
1814 return ret;
1815 }
1816
1817 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1818 {
1819 struct ethtool_value id;
1820 static bool busy;
1821 const struct ethtool_ops *ops = dev->ethtool_ops;
1822 int rc;
1823
1824 if (!ops->set_phys_id)
1825 return -EOPNOTSUPP;
1826
1827 if (busy)
1828 return -EBUSY;
1829
1830 if (copy_from_user(&id, useraddr, sizeof(id)))
1831 return -EFAULT;
1832
1833 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1834 if (rc < 0)
1835 return rc;
1836
1837 /* Drop the RTNL lock while waiting, but prevent reentry or
1838 * removal of the device.
1839 */
1840 busy = true;
1841 dev_hold(dev);
1842 rtnl_unlock();
1843
1844 if (rc == 0) {
1845 /* Driver will handle this itself */
1846 schedule_timeout_interruptible(
1847 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1848 } else {
1849 /* Driver expects to be called at twice the frequency in rc */
1850 int n = rc * 2, i, interval = HZ / n;
1851
1852 /* Count down seconds */
1853 do {
1854 /* Count down iterations per second */
1855 i = n;
1856 do {
1857 rtnl_lock();
1858 rc = ops->set_phys_id(dev,
1859 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1860 rtnl_unlock();
1861 if (rc)
1862 break;
1863 schedule_timeout_interruptible(interval);
1864 } while (!signal_pending(current) && --i != 0);
1865 } while (!signal_pending(current) &&
1866 (id.data == 0 || --id.data != 0));
1867 }
1868
1869 rtnl_lock();
1870 dev_put(dev);
1871 busy = false;
1872
1873 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1874 return rc;
1875 }
1876
1877 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1878 {
1879 struct ethtool_stats stats;
1880 const struct ethtool_ops *ops = dev->ethtool_ops;
1881 u64 *data;
1882 int ret, n_stats;
1883
1884 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1885 return -EOPNOTSUPP;
1886
1887 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1888 if (n_stats < 0)
1889 return n_stats;
1890 if (n_stats > S32_MAX / sizeof(u64))
1891 return -ENOMEM;
1892 WARN_ON_ONCE(!n_stats);
1893 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1894 return -EFAULT;
1895
1896 stats.n_stats = n_stats;
1897 data = vzalloc(array_size(n_stats, sizeof(u64)));
1898 if (n_stats && !data)
1899 return -ENOMEM;
1900
1901 ops->get_ethtool_stats(dev, &stats, data);
1902
1903 ret = -EFAULT;
1904 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1905 goto out;
1906 useraddr += sizeof(stats);
1907 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1908 goto out;
1909 ret = 0;
1910
1911 out:
1912 vfree(data);
1913 return ret;
1914 }
1915
1916 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1917 {
1918 const struct ethtool_ops *ops = dev->ethtool_ops;
1919 struct phy_device *phydev = dev->phydev;
1920 struct ethtool_stats stats;
1921 u64 *data;
1922 int ret, n_stats;
1923
1924 if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
1925 return -EOPNOTSUPP;
1926
1927 if (dev->phydev && !ops->get_ethtool_phy_stats)
1928 n_stats = phy_ethtool_get_sset_count(dev->phydev);
1929 else
1930 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
1931 if (n_stats < 0)
1932 return n_stats;
1933 if (n_stats > S32_MAX / sizeof(u64))
1934 return -ENOMEM;
1935 WARN_ON_ONCE(!n_stats);
1936
1937 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1938 return -EFAULT;
1939
1940 stats.n_stats = n_stats;
1941 data = vzalloc(array_size(n_stats, sizeof(u64)));
1942 if (n_stats && !data)
1943 return -ENOMEM;
1944
1945 if (dev->phydev && !ops->get_ethtool_phy_stats) {
1946 ret = phy_ethtool_get_stats(dev->phydev, &stats, data);
1947 if (ret < 0)
1948 return ret;
1949 } else {
1950 ops->get_ethtool_phy_stats(dev, &stats, data);
1951 }
1952
1953 ret = -EFAULT;
1954 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1955 goto out;
1956 useraddr += sizeof(stats);
1957 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1958 goto out;
1959 ret = 0;
1960
1961 out:
1962 vfree(data);
1963 return ret;
1964 }
1965
1966 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1967 {
1968 struct ethtool_perm_addr epaddr;
1969
1970 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1971 return -EFAULT;
1972
1973 if (epaddr.size < dev->addr_len)
1974 return -ETOOSMALL;
1975 epaddr.size = dev->addr_len;
1976
1977 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1978 return -EFAULT;
1979 useraddr += sizeof(epaddr);
1980 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1981 return -EFAULT;
1982 return 0;
1983 }
1984
1985 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1986 u32 cmd, u32 (*actor)(struct net_device *))
1987 {
1988 struct ethtool_value edata = { .cmd = cmd };
1989
1990 if (!actor)
1991 return -EOPNOTSUPP;
1992
1993 edata.data = actor(dev);
1994
1995 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1996 return -EFAULT;
1997 return 0;
1998 }
1999
2000 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2001 void (*actor)(struct net_device *, u32))
2002 {
2003 struct ethtool_value edata;
2004
2005 if (!actor)
2006 return -EOPNOTSUPP;
2007
2008 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2009 return -EFAULT;
2010
2011 actor(dev, edata.data);
2012 return 0;
2013 }
2014
2015 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2016 int (*actor)(struct net_device *, u32))
2017 {
2018 struct ethtool_value edata;
2019
2020 if (!actor)
2021 return -EOPNOTSUPP;
2022
2023 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2024 return -EFAULT;
2025
2026 return actor(dev, edata.data);
2027 }
2028
2029 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2030 char __user *useraddr)
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
2040 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2041
2042 return dev->ethtool_ops->flash_device(dev, &efl);
2043 }
2044
2045 static 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
2059 static 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
2066 if (!ops->get_dump_flag)
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
2081 static 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
2090 if (!ops->get_dump_data || !ops->get_dump_flag)
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
2102 len = min(tmp.len, dump.len);
2103 if (!len)
2104 return -EFAULT;
2105
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 */
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
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
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;
2139 out:
2140 vfree(data);
2141 return ret;
2142 }
2143
2144 static 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) {
2155 err = phydev->drv->ts_info(phydev, &info);
2156 } else if (ops->get_ts_info) {
2157 err = ops->get_ts_info(dev, &info);
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
2174 static 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 (dev->sfp_bus)
2181 return sfp_get_module_info(dev->sfp_bus, modinfo);
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
2192 static int ethtool_get_module_info(struct net_device *dev,
2193 void __user *useraddr)
2194 {
2195 int ret;
2196 struct ethtool_modinfo modinfo;
2197
2198 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2199 return -EFAULT;
2200
2201 ret = __ethtool_get_module_info(dev, &modinfo);
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
2211 static 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 (dev->sfp_bus)
2218 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2219
2220 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2221 return phydev->drv->module_eeprom(phydev, ee, data);
2222
2223 if (ops->get_module_eeprom)
2224 return ops->get_module_eeprom(dev, ee, data);
2225
2226 return -EOPNOTSUPP;
2227 }
2228
2229 static int ethtool_get_module_eeprom(struct net_device *dev,
2230 void __user *useraddr)
2231 {
2232 int ret;
2233 struct ethtool_modinfo modinfo;
2234
2235 ret = __ethtool_get_module_info(dev, &modinfo);
2236 if (ret)
2237 return ret;
2238
2239 return ethtool_get_any_eeprom(dev, useraddr,
2240 __ethtool_get_module_eeprom,
2241 modinfo.eeprom_len);
2242 }
2243
2244 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2245 {
2246 switch (tuna->id) {
2247 case ETHTOOL_RX_COPYBREAK:
2248 case ETHTOOL_TX_COPYBREAK:
2249 if (tuna->len != sizeof(u32) ||
2250 tuna->type_id != ETHTOOL_TUNABLE_U32)
2251 return -EINVAL;
2252 break;
2253 case ETHTOOL_PFC_PREVENTION_TOUT:
2254 if (tuna->len != sizeof(u16) ||
2255 tuna->type_id != ETHTOOL_TUNABLE_U16)
2256 return -EINVAL;
2257 break;
2258 default:
2259 return -EINVAL;
2260 }
2261
2262 return 0;
2263 }
2264
2265 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2266 {
2267 int ret;
2268 struct ethtool_tunable tuna;
2269 const struct ethtool_ops *ops = dev->ethtool_ops;
2270 void *data;
2271
2272 if (!ops->get_tunable)
2273 return -EOPNOTSUPP;
2274 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2275 return -EFAULT;
2276 ret = ethtool_tunable_valid(&tuna);
2277 if (ret)
2278 return ret;
2279 data = kmalloc(tuna.len, GFP_USER);
2280 if (!data)
2281 return -ENOMEM;
2282 ret = ops->get_tunable(dev, &tuna, data);
2283 if (ret)
2284 goto out;
2285 useraddr += sizeof(tuna);
2286 ret = -EFAULT;
2287 if (copy_to_user(useraddr, data, tuna.len))
2288 goto out;
2289 ret = 0;
2290
2291 out:
2292 kfree(data);
2293 return ret;
2294 }
2295
2296 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2297 {
2298 int ret;
2299 struct ethtool_tunable tuna;
2300 const struct ethtool_ops *ops = dev->ethtool_ops;
2301 void *data;
2302
2303 if (!ops->set_tunable)
2304 return -EOPNOTSUPP;
2305 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2306 return -EFAULT;
2307 ret = ethtool_tunable_valid(&tuna);
2308 if (ret)
2309 return ret;
2310 useraddr += sizeof(tuna);
2311 data = memdup_user(useraddr, tuna.len);
2312 if (IS_ERR(data))
2313 return PTR_ERR(data);
2314 ret = ops->set_tunable(dev, &tuna, data);
2315
2316 kfree(data);
2317 return ret;
2318 }
2319
2320 static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2321 void __user *useraddr,
2322 struct ethtool_per_queue_op *per_queue_opt)
2323 {
2324 u32 bit;
2325 int ret;
2326 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2327
2328 if (!dev->ethtool_ops->get_per_queue_coalesce)
2329 return -EOPNOTSUPP;
2330
2331 useraddr += sizeof(*per_queue_opt);
2332
2333 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2334 MAX_NUM_QUEUE);
2335
2336 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2337 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2338
2339 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2340 if (ret != 0)
2341 return ret;
2342 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2343 return -EFAULT;
2344 useraddr += sizeof(coalesce);
2345 }
2346
2347 return 0;
2348 }
2349
2350 static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2351 void __user *useraddr,
2352 struct ethtool_per_queue_op *per_queue_opt)
2353 {
2354 u32 bit;
2355 int i, ret = 0;
2356 int n_queue;
2357 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2358 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2359
2360 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2361 (!dev->ethtool_ops->get_per_queue_coalesce))
2362 return -EOPNOTSUPP;
2363
2364 useraddr += sizeof(*per_queue_opt);
2365
2366 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2367 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2368 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2369 if (!backup)
2370 return -ENOMEM;
2371
2372 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2373 struct ethtool_coalesce coalesce;
2374
2375 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2376 if (ret != 0)
2377 goto roll_back;
2378
2379 tmp++;
2380
2381 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2382 ret = -EFAULT;
2383 goto roll_back;
2384 }
2385
2386 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2387 if (ret != 0)
2388 goto roll_back;
2389
2390 useraddr += sizeof(coalesce);
2391 }
2392
2393 roll_back:
2394 if (ret != 0) {
2395 tmp = backup;
2396 for_each_set_bit(i, queue_mask, bit) {
2397 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2398 tmp++;
2399 }
2400 }
2401 kfree(backup);
2402
2403 return ret;
2404 }
2405
2406 static int ethtool_set_per_queue(struct net_device *dev,
2407 void __user *useraddr, u32 sub_cmd)
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 if (per_queue_opt.sub_command != sub_cmd)
2415 return -EINVAL;
2416
2417 switch (per_queue_opt.sub_command) {
2418 case ETHTOOL_GCOALESCE:
2419 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2420 case ETHTOOL_SCOALESCE:
2421 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2422 default:
2423 return -EOPNOTSUPP;
2424 };
2425 }
2426
2427 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2428 {
2429 switch (tuna->id) {
2430 case ETHTOOL_PHY_DOWNSHIFT:
2431 if (tuna->len != sizeof(u8) ||
2432 tuna->type_id != ETHTOOL_TUNABLE_U8)
2433 return -EINVAL;
2434 break;
2435 default:
2436 return -EINVAL;
2437 }
2438
2439 return 0;
2440 }
2441
2442 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2443 {
2444 int ret;
2445 struct ethtool_tunable tuna;
2446 struct phy_device *phydev = dev->phydev;
2447 void *data;
2448
2449 if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2450 return -EOPNOTSUPP;
2451
2452 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2453 return -EFAULT;
2454 ret = ethtool_phy_tunable_valid(&tuna);
2455 if (ret)
2456 return ret;
2457 data = kmalloc(tuna.len, GFP_USER);
2458 if (!data)
2459 return -ENOMEM;
2460 mutex_lock(&phydev->lock);
2461 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2462 mutex_unlock(&phydev->lock);
2463 if (ret)
2464 goto out;
2465 useraddr += sizeof(tuna);
2466 ret = -EFAULT;
2467 if (copy_to_user(useraddr, data, tuna.len))
2468 goto out;
2469 ret = 0;
2470
2471 out:
2472 kfree(data);
2473 return ret;
2474 }
2475
2476 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2477 {
2478 int ret;
2479 struct ethtool_tunable tuna;
2480 struct phy_device *phydev = dev->phydev;
2481 void *data;
2482
2483 if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2484 return -EOPNOTSUPP;
2485 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2486 return -EFAULT;
2487 ret = ethtool_phy_tunable_valid(&tuna);
2488 if (ret)
2489 return ret;
2490 useraddr += sizeof(tuna);
2491 data = memdup_user(useraddr, tuna.len);
2492 if (IS_ERR(data))
2493 return PTR_ERR(data);
2494 mutex_lock(&phydev->lock);
2495 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2496 mutex_unlock(&phydev->lock);
2497
2498 kfree(data);
2499 return ret;
2500 }
2501
2502 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2503 {
2504 struct ethtool_fecparam fecparam = { ETHTOOL_GFECPARAM };
2505 int rc;
2506
2507 if (!dev->ethtool_ops->get_fecparam)
2508 return -EOPNOTSUPP;
2509
2510 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2511 if (rc)
2512 return rc;
2513
2514 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2515 return -EFAULT;
2516 return 0;
2517 }
2518
2519 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2520 {
2521 struct ethtool_fecparam fecparam;
2522
2523 if (!dev->ethtool_ops->set_fecparam)
2524 return -EOPNOTSUPP;
2525
2526 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2527 return -EFAULT;
2528
2529 return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2530 }
2531
2532 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
2533
2534 int dev_ethtool(struct net *net, struct ifreq *ifr)
2535 {
2536 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2537 void __user *useraddr = ifr->ifr_data;
2538 u32 ethcmd, sub_cmd;
2539 int rc;
2540 netdev_features_t old_features;
2541
2542 if (!dev || !netif_device_present(dev))
2543 return -ENODEV;
2544
2545 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2546 return -EFAULT;
2547
2548 if (ethcmd == ETHTOOL_PERQUEUE) {
2549 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2550 return -EFAULT;
2551 } else {
2552 sub_cmd = ethcmd;
2553 }
2554 /* Allow some commands to be done by anyone */
2555 switch (sub_cmd) {
2556 case ETHTOOL_GSET:
2557 case ETHTOOL_GDRVINFO:
2558 case ETHTOOL_GMSGLVL:
2559 case ETHTOOL_GLINK:
2560 case ETHTOOL_GCOALESCE:
2561 case ETHTOOL_GRINGPARAM:
2562 case ETHTOOL_GPAUSEPARAM:
2563 case ETHTOOL_GRXCSUM:
2564 case ETHTOOL_GTXCSUM:
2565 case ETHTOOL_GSG:
2566 case ETHTOOL_GSSET_INFO:
2567 case ETHTOOL_GSTRINGS:
2568 case ETHTOOL_GSTATS:
2569 case ETHTOOL_GPHYSTATS:
2570 case ETHTOOL_GTSO:
2571 case ETHTOOL_GPERMADDR:
2572 case ETHTOOL_GUFO:
2573 case ETHTOOL_GGSO:
2574 case ETHTOOL_GGRO:
2575 case ETHTOOL_GFLAGS:
2576 case ETHTOOL_GPFLAGS:
2577 case ETHTOOL_GRXFH:
2578 case ETHTOOL_GRXRINGS:
2579 case ETHTOOL_GRXCLSRLCNT:
2580 case ETHTOOL_GRXCLSRULE:
2581 case ETHTOOL_GRXCLSRLALL:
2582 case ETHTOOL_GRXFHINDIR:
2583 case ETHTOOL_GRSSH:
2584 case ETHTOOL_GFEATURES:
2585 case ETHTOOL_GCHANNELS:
2586 case ETHTOOL_GET_TS_INFO:
2587 case ETHTOOL_GEEE:
2588 case ETHTOOL_GTUNABLE:
2589 case ETHTOOL_PHY_GTUNABLE:
2590 case ETHTOOL_GLINKSETTINGS:
2591 case ETHTOOL_GFECPARAM:
2592 break;
2593 default:
2594 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2595 return -EPERM;
2596 }
2597
2598 if (dev->ethtool_ops->begin) {
2599 rc = dev->ethtool_ops->begin(dev);
2600 if (rc < 0)
2601 return rc;
2602 }
2603 old_features = dev->features;
2604
2605 switch (ethcmd) {
2606 case ETHTOOL_GSET:
2607 rc = ethtool_get_settings(dev, useraddr);
2608 break;
2609 case ETHTOOL_SSET:
2610 rc = ethtool_set_settings(dev, useraddr);
2611 break;
2612 case ETHTOOL_GDRVINFO:
2613 rc = ethtool_get_drvinfo(dev, useraddr);
2614 break;
2615 case ETHTOOL_GREGS:
2616 rc = ethtool_get_regs(dev, useraddr);
2617 break;
2618 case ETHTOOL_GWOL:
2619 rc = ethtool_get_wol(dev, useraddr);
2620 break;
2621 case ETHTOOL_SWOL:
2622 rc = ethtool_set_wol(dev, useraddr);
2623 break;
2624 case ETHTOOL_GMSGLVL:
2625 rc = ethtool_get_value(dev, useraddr, ethcmd,
2626 dev->ethtool_ops->get_msglevel);
2627 break;
2628 case ETHTOOL_SMSGLVL:
2629 rc = ethtool_set_value_void(dev, useraddr,
2630 dev->ethtool_ops->set_msglevel);
2631 break;
2632 case ETHTOOL_GEEE:
2633 rc = ethtool_get_eee(dev, useraddr);
2634 break;
2635 case ETHTOOL_SEEE:
2636 rc = ethtool_set_eee(dev, useraddr);
2637 break;
2638 case ETHTOOL_NWAY_RST:
2639 rc = ethtool_nway_reset(dev);
2640 break;
2641 case ETHTOOL_GLINK:
2642 rc = ethtool_get_link(dev, useraddr);
2643 break;
2644 case ETHTOOL_GEEPROM:
2645 rc = ethtool_get_eeprom(dev, useraddr);
2646 break;
2647 case ETHTOOL_SEEPROM:
2648 rc = ethtool_set_eeprom(dev, useraddr);
2649 break;
2650 case ETHTOOL_GCOALESCE:
2651 rc = ethtool_get_coalesce(dev, useraddr);
2652 break;
2653 case ETHTOOL_SCOALESCE:
2654 rc = ethtool_set_coalesce(dev, useraddr);
2655 break;
2656 case ETHTOOL_GRINGPARAM:
2657 rc = ethtool_get_ringparam(dev, useraddr);
2658 break;
2659 case ETHTOOL_SRINGPARAM:
2660 rc = ethtool_set_ringparam(dev, useraddr);
2661 break;
2662 case ETHTOOL_GPAUSEPARAM:
2663 rc = ethtool_get_pauseparam(dev, useraddr);
2664 break;
2665 case ETHTOOL_SPAUSEPARAM:
2666 rc = ethtool_set_pauseparam(dev, useraddr);
2667 break;
2668 case ETHTOOL_TEST:
2669 rc = ethtool_self_test(dev, useraddr);
2670 break;
2671 case ETHTOOL_GSTRINGS:
2672 rc = ethtool_get_strings(dev, useraddr);
2673 break;
2674 case ETHTOOL_PHYS_ID:
2675 rc = ethtool_phys_id(dev, useraddr);
2676 break;
2677 case ETHTOOL_GSTATS:
2678 rc = ethtool_get_stats(dev, useraddr);
2679 break;
2680 case ETHTOOL_GPERMADDR:
2681 rc = ethtool_get_perm_addr(dev, useraddr);
2682 break;
2683 case ETHTOOL_GFLAGS:
2684 rc = ethtool_get_value(dev, useraddr, ethcmd,
2685 __ethtool_get_flags);
2686 break;
2687 case ETHTOOL_SFLAGS:
2688 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2689 break;
2690 case ETHTOOL_GPFLAGS:
2691 rc = ethtool_get_value(dev, useraddr, ethcmd,
2692 dev->ethtool_ops->get_priv_flags);
2693 break;
2694 case ETHTOOL_SPFLAGS:
2695 rc = ethtool_set_value(dev, useraddr,
2696 dev->ethtool_ops->set_priv_flags);
2697 break;
2698 case ETHTOOL_GRXFH:
2699 case ETHTOOL_GRXRINGS:
2700 case ETHTOOL_GRXCLSRLCNT:
2701 case ETHTOOL_GRXCLSRULE:
2702 case ETHTOOL_GRXCLSRLALL:
2703 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2704 break;
2705 case ETHTOOL_SRXFH:
2706 case ETHTOOL_SRXCLSRLDEL:
2707 case ETHTOOL_SRXCLSRLINS:
2708 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2709 break;
2710 case ETHTOOL_FLASHDEV:
2711 rc = ethtool_flash_device(dev, useraddr);
2712 break;
2713 case ETHTOOL_RESET:
2714 rc = ethtool_reset(dev, useraddr);
2715 break;
2716 case ETHTOOL_GSSET_INFO:
2717 rc = ethtool_get_sset_info(dev, useraddr);
2718 break;
2719 case ETHTOOL_GRXFHINDIR:
2720 rc = ethtool_get_rxfh_indir(dev, useraddr);
2721 break;
2722 case ETHTOOL_SRXFHINDIR:
2723 rc = ethtool_set_rxfh_indir(dev, useraddr);
2724 break;
2725 case ETHTOOL_GRSSH:
2726 rc = ethtool_get_rxfh(dev, useraddr);
2727 break;
2728 case ETHTOOL_SRSSH:
2729 rc = ethtool_set_rxfh(dev, useraddr);
2730 break;
2731 case ETHTOOL_GFEATURES:
2732 rc = ethtool_get_features(dev, useraddr);
2733 break;
2734 case ETHTOOL_SFEATURES:
2735 rc = ethtool_set_features(dev, useraddr);
2736 break;
2737 case ETHTOOL_GTXCSUM:
2738 case ETHTOOL_GRXCSUM:
2739 case ETHTOOL_GSG:
2740 case ETHTOOL_GTSO:
2741 case ETHTOOL_GGSO:
2742 case ETHTOOL_GGRO:
2743 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2744 break;
2745 case ETHTOOL_STXCSUM:
2746 case ETHTOOL_SRXCSUM:
2747 case ETHTOOL_SSG:
2748 case ETHTOOL_STSO:
2749 case ETHTOOL_SGSO:
2750 case ETHTOOL_SGRO:
2751 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2752 break;
2753 case ETHTOOL_GCHANNELS:
2754 rc = ethtool_get_channels(dev, useraddr);
2755 break;
2756 case ETHTOOL_SCHANNELS:
2757 rc = ethtool_set_channels(dev, useraddr);
2758 break;
2759 case ETHTOOL_SET_DUMP:
2760 rc = ethtool_set_dump(dev, useraddr);
2761 break;
2762 case ETHTOOL_GET_DUMP_FLAG:
2763 rc = ethtool_get_dump_flag(dev, useraddr);
2764 break;
2765 case ETHTOOL_GET_DUMP_DATA:
2766 rc = ethtool_get_dump_data(dev, useraddr);
2767 break;
2768 case ETHTOOL_GET_TS_INFO:
2769 rc = ethtool_get_ts_info(dev, useraddr);
2770 break;
2771 case ETHTOOL_GMODULEINFO:
2772 rc = ethtool_get_module_info(dev, useraddr);
2773 break;
2774 case ETHTOOL_GMODULEEEPROM:
2775 rc = ethtool_get_module_eeprom(dev, useraddr);
2776 break;
2777 case ETHTOOL_GTUNABLE:
2778 rc = ethtool_get_tunable(dev, useraddr);
2779 break;
2780 case ETHTOOL_STUNABLE:
2781 rc = ethtool_set_tunable(dev, useraddr);
2782 break;
2783 case ETHTOOL_GPHYSTATS:
2784 rc = ethtool_get_phy_stats(dev, useraddr);
2785 break;
2786 case ETHTOOL_PERQUEUE:
2787 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2788 break;
2789 case ETHTOOL_GLINKSETTINGS:
2790 rc = ethtool_get_link_ksettings(dev, useraddr);
2791 break;
2792 case ETHTOOL_SLINKSETTINGS:
2793 rc = ethtool_set_link_ksettings(dev, useraddr);
2794 break;
2795 case ETHTOOL_PHY_GTUNABLE:
2796 rc = get_phy_tunable(dev, useraddr);
2797 break;
2798 case ETHTOOL_PHY_STUNABLE:
2799 rc = set_phy_tunable(dev, useraddr);
2800 break;
2801 case ETHTOOL_GFECPARAM:
2802 rc = ethtool_get_fecparam(dev, useraddr);
2803 break;
2804 case ETHTOOL_SFECPARAM:
2805 rc = ethtool_set_fecparam(dev, useraddr);
2806 break;
2807 default:
2808 rc = -EOPNOTSUPP;
2809 }
2810
2811 if (dev->ethtool_ops->complete)
2812 dev->ethtool_ops->complete(dev);
2813
2814 if (old_features != dev->features)
2815 netdev_features_change(dev);
2816
2817 return rc;
2818 }
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