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Merge tag 'sh-for-4.17-fixes' of git://git.libc.org/linux-sh
[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
31 /*
32 * Some useful ethtool_ops methods that're device independent.
33 * If we find that all drivers want to do the same thing here,
34 * we can turn these into dev_() function calls.
35 */
36
37 u32 ethtool_op_get_link(struct net_device *dev)
38 {
39 return netif_carrier_ok(dev) ? 1 : 0;
40 }
41 EXPORT_SYMBOL(ethtool_op_get_link);
42
43 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
44 {
45 info->so_timestamping =
46 SOF_TIMESTAMPING_TX_SOFTWARE |
47 SOF_TIMESTAMPING_RX_SOFTWARE |
48 SOF_TIMESTAMPING_SOFTWARE;
49 info->phc_index = -1;
50 return 0;
51 }
52 EXPORT_SYMBOL(ethtool_op_get_ts_info);
53
54 /* Handlers for each ethtool command */
55
56 #define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
57
58 static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
59 [NETIF_F_SG_BIT] = "tx-scatter-gather",
60 [NETIF_F_IP_CSUM_BIT] = "tx-checksum-ipv4",
61 [NETIF_F_HW_CSUM_BIT] = "tx-checksum-ip-generic",
62 [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6",
63 [NETIF_F_HIGHDMA_BIT] = "highdma",
64 [NETIF_F_FRAGLIST_BIT] = "tx-scatter-gather-fraglist",
65 [NETIF_F_HW_VLAN_CTAG_TX_BIT] = "tx-vlan-hw-insert",
66
67 [NETIF_F_HW_VLAN_CTAG_RX_BIT] = "rx-vlan-hw-parse",
68 [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
69 [NETIF_F_HW_VLAN_STAG_TX_BIT] = "tx-vlan-stag-hw-insert",
70 [NETIF_F_HW_VLAN_STAG_RX_BIT] = "rx-vlan-stag-hw-parse",
71 [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
72 [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged",
73 [NETIF_F_GSO_BIT] = "tx-generic-segmentation",
74 [NETIF_F_LLTX_BIT] = "tx-lockless",
75 [NETIF_F_NETNS_LOCAL_BIT] = "netns-local",
76 [NETIF_F_GRO_BIT] = "rx-gro",
77 [NETIF_F_GRO_HW_BIT] = "rx-gro-hw",
78 [NETIF_F_LRO_BIT] = "rx-lro",
79
80 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation",
81 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
82 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
83 [NETIF_F_TSO_MANGLEID_BIT] = "tx-tcp-mangleid-segmentation",
84 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
85 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
86 [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
87 [NETIF_F_GSO_GRE_CSUM_BIT] = "tx-gre-csum-segmentation",
88 [NETIF_F_GSO_IPXIP4_BIT] = "tx-ipxip4-segmentation",
89 [NETIF_F_GSO_IPXIP6_BIT] = "tx-ipxip6-segmentation",
90 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
91 [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
92 [NETIF_F_GSO_PARTIAL_BIT] = "tx-gso-partial",
93 [NETIF_F_GSO_SCTP_BIT] = "tx-sctp-segmentation",
94 [NETIF_F_GSO_ESP_BIT] = "tx-esp-segmentation",
95
96 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
97 [NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
98 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
99 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
100 [NETIF_F_RXHASH_BIT] = "rx-hashing",
101 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
102 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
103 [NETIF_F_LOOPBACK_BIT] = "loopback",
104 [NETIF_F_RXFCS_BIT] = "rx-fcs",
105 [NETIF_F_RXALL_BIT] = "rx-all",
106 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
107 [NETIF_F_HW_TC_BIT] = "hw-tc-offload",
108 [NETIF_F_HW_ESP_BIT] = "esp-hw-offload",
109 [NETIF_F_HW_ESP_TX_CSUM_BIT] = "esp-tx-csum-hw-offload",
110 [NETIF_F_RX_UDP_TUNNEL_PORT_BIT] = "rx-udp_tunnel-port-offload",
111 [NETIF_F_HW_TLS_RECORD_BIT] = "tls-hw-record",
112 };
113
114 static const char
115 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
116 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
117 [ETH_RSS_HASH_XOR_BIT] = "xor",
118 [ETH_RSS_HASH_CRC32_BIT] = "crc32",
119 };
120
121 static const char
122 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
123 [ETHTOOL_ID_UNSPEC] = "Unspec",
124 [ETHTOOL_RX_COPYBREAK] = "rx-copybreak",
125 [ETHTOOL_TX_COPYBREAK] = "tx-copybreak",
126 [ETHTOOL_PFC_PREVENTION_TOUT] = "pfc-prevention-tout",
127 };
128
129 static const char
130 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
131 [ETHTOOL_ID_UNSPEC] = "Unspec",
132 [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
133 };
134
135 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
136 {
137 struct ethtool_gfeatures cmd = {
138 .cmd = ETHTOOL_GFEATURES,
139 .size = ETHTOOL_DEV_FEATURE_WORDS,
140 };
141 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
142 u32 __user *sizeaddr;
143 u32 copy_size;
144 int i;
145
146 /* in case feature bits run out again */
147 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
148
149 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
150 features[i].available = (u32)(dev->hw_features >> (32 * i));
151 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
152 features[i].active = (u32)(dev->features >> (32 * i));
153 features[i].never_changed =
154 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
155 }
156
157 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
158 if (get_user(copy_size, sizeaddr))
159 return -EFAULT;
160
161 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
162 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
163
164 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
165 return -EFAULT;
166 useraddr += sizeof(cmd);
167 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
168 return -EFAULT;
169
170 return 0;
171 }
172
173 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
174 {
175 struct ethtool_sfeatures cmd;
176 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
177 netdev_features_t wanted = 0, valid = 0;
178 int i, ret = 0;
179
180 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
181 return -EFAULT;
182 useraddr += sizeof(cmd);
183
184 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
185 return -EINVAL;
186
187 if (copy_from_user(features, useraddr, sizeof(features)))
188 return -EFAULT;
189
190 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
191 valid |= (netdev_features_t)features[i].valid << (32 * i);
192 wanted |= (netdev_features_t)features[i].requested << (32 * i);
193 }
194
195 if (valid & ~NETIF_F_ETHTOOL_BITS)
196 return -EINVAL;
197
198 if (valid & ~dev->hw_features) {
199 valid &= dev->hw_features;
200 ret |= ETHTOOL_F_UNSUPPORTED;
201 }
202
203 dev->wanted_features &= ~valid;
204 dev->wanted_features |= wanted & valid;
205 __netdev_update_features(dev);
206
207 if ((dev->wanted_features ^ dev->features) & valid)
208 ret |= ETHTOOL_F_WISH;
209
210 return ret;
211 }
212
213 static int phy_get_sset_count(struct phy_device *phydev)
214 {
215 int ret;
216
217 if (phydev->drv->get_sset_count &&
218 phydev->drv->get_strings &&
219 phydev->drv->get_stats) {
220 mutex_lock(&phydev->lock);
221 ret = phydev->drv->get_sset_count(phydev);
222 mutex_unlock(&phydev->lock);
223
224 return ret;
225 }
226
227 return -EOPNOTSUPP;
228 }
229
230 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
231 {
232 const struct ethtool_ops *ops = dev->ethtool_ops;
233
234 if (sset == ETH_SS_FEATURES)
235 return ARRAY_SIZE(netdev_features_strings);
236
237 if (sset == ETH_SS_RSS_HASH_FUNCS)
238 return ARRAY_SIZE(rss_hash_func_strings);
239
240 if (sset == ETH_SS_TUNABLES)
241 return ARRAY_SIZE(tunable_strings);
242
243 if (sset == ETH_SS_PHY_TUNABLES)
244 return ARRAY_SIZE(phy_tunable_strings);
245
246 if (sset == ETH_SS_PHY_STATS) {
247 if (dev->phydev)
248 return phy_get_sset_count(dev->phydev);
249 else
250 return -EOPNOTSUPP;
251 }
252
253 if (ops->get_sset_count && ops->get_strings)
254 return ops->get_sset_count(dev, sset);
255 else
256 return -EOPNOTSUPP;
257 }
258
259 static void __ethtool_get_strings(struct net_device *dev,
260 u32 stringset, u8 *data)
261 {
262 const struct ethtool_ops *ops = dev->ethtool_ops;
263
264 if (stringset == ETH_SS_FEATURES)
265 memcpy(data, netdev_features_strings,
266 sizeof(netdev_features_strings));
267 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
268 memcpy(data, rss_hash_func_strings,
269 sizeof(rss_hash_func_strings));
270 else if (stringset == ETH_SS_TUNABLES)
271 memcpy(data, tunable_strings, sizeof(tunable_strings));
272 else if (stringset == ETH_SS_PHY_TUNABLES)
273 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
274 else if (stringset == ETH_SS_PHY_STATS) {
275 struct phy_device *phydev = dev->phydev;
276
277 if (phydev) {
278 mutex_lock(&phydev->lock);
279 phydev->drv->get_strings(phydev, data);
280 mutex_unlock(&phydev->lock);
281 } else {
282 return;
283 }
284 } else
285 /* ops->get_strings is valid because checked earlier */
286 ops->get_strings(dev, stringset, data);
287 }
288
289 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
290 {
291 /* feature masks of legacy discrete ethtool ops */
292
293 switch (eth_cmd) {
294 case ETHTOOL_GTXCSUM:
295 case ETHTOOL_STXCSUM:
296 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
297 case ETHTOOL_GRXCSUM:
298 case ETHTOOL_SRXCSUM:
299 return NETIF_F_RXCSUM;
300 case ETHTOOL_GSG:
301 case ETHTOOL_SSG:
302 return NETIF_F_SG;
303 case ETHTOOL_GTSO:
304 case ETHTOOL_STSO:
305 return NETIF_F_ALL_TSO;
306 case ETHTOOL_GGSO:
307 case ETHTOOL_SGSO:
308 return NETIF_F_GSO;
309 case ETHTOOL_GGRO:
310 case ETHTOOL_SGRO:
311 return NETIF_F_GRO;
312 default:
313 BUG();
314 }
315 }
316
317 static int ethtool_get_one_feature(struct net_device *dev,
318 char __user *useraddr, u32 ethcmd)
319 {
320 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
321 struct ethtool_value edata = {
322 .cmd = ethcmd,
323 .data = !!(dev->features & mask),
324 };
325
326 if (copy_to_user(useraddr, &edata, sizeof(edata)))
327 return -EFAULT;
328 return 0;
329 }
330
331 static int ethtool_set_one_feature(struct net_device *dev,
332 void __user *useraddr, u32 ethcmd)
333 {
334 struct ethtool_value edata;
335 netdev_features_t mask;
336
337 if (copy_from_user(&edata, useraddr, sizeof(edata)))
338 return -EFAULT;
339
340 mask = ethtool_get_feature_mask(ethcmd);
341 mask &= dev->hw_features;
342 if (!mask)
343 return -EOPNOTSUPP;
344
345 if (edata.data)
346 dev->wanted_features |= mask;
347 else
348 dev->wanted_features &= ~mask;
349
350 __netdev_update_features(dev);
351
352 return 0;
353 }
354
355 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
356 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
357 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
358 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
359 NETIF_F_RXHASH)
360
361 static u32 __ethtool_get_flags(struct net_device *dev)
362 {
363 u32 flags = 0;
364
365 if (dev->features & NETIF_F_LRO)
366 flags |= ETH_FLAG_LRO;
367 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
368 flags |= ETH_FLAG_RXVLAN;
369 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
370 flags |= ETH_FLAG_TXVLAN;
371 if (dev->features & NETIF_F_NTUPLE)
372 flags |= ETH_FLAG_NTUPLE;
373 if (dev->features & NETIF_F_RXHASH)
374 flags |= ETH_FLAG_RXHASH;
375
376 return flags;
377 }
378
379 static int __ethtool_set_flags(struct net_device *dev, u32 data)
380 {
381 netdev_features_t features = 0, changed;
382
383 if (data & ~ETH_ALL_FLAGS)
384 return -EINVAL;
385
386 if (data & ETH_FLAG_LRO)
387 features |= NETIF_F_LRO;
388 if (data & ETH_FLAG_RXVLAN)
389 features |= NETIF_F_HW_VLAN_CTAG_RX;
390 if (data & ETH_FLAG_TXVLAN)
391 features |= NETIF_F_HW_VLAN_CTAG_TX;
392 if (data & ETH_FLAG_NTUPLE)
393 features |= NETIF_F_NTUPLE;
394 if (data & ETH_FLAG_RXHASH)
395 features |= NETIF_F_RXHASH;
396
397 /* allow changing only bits set in hw_features */
398 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
399 if (changed & ~dev->hw_features)
400 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
401
402 dev->wanted_features =
403 (dev->wanted_features & ~changed) | (features & changed);
404
405 __netdev_update_features(dev);
406
407 return 0;
408 }
409
410 /* Given two link masks, AND them together and save the result in dst. */
411 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
412 struct ethtool_link_ksettings *src)
413 {
414 unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
415 unsigned int idx = 0;
416
417 for (; idx < size; idx++) {
418 dst->link_modes.supported[idx] &=
419 src->link_modes.supported[idx];
420 dst->link_modes.advertising[idx] &=
421 src->link_modes.advertising[idx];
422 }
423 }
424 EXPORT_SYMBOL(ethtool_intersect_link_masks);
425
426 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
427 u32 legacy_u32)
428 {
429 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
430 dst[0] = legacy_u32;
431 }
432 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
433
434 /* return false if src had higher bits set. lower bits always updated. */
435 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
436 const unsigned long *src)
437 {
438 bool retval = true;
439
440 /* TODO: following test will soon always be true */
441 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
442 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
443
444 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
445 bitmap_fill(ext, 32);
446 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
447 if (bitmap_intersects(ext, src,
448 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
449 /* src mask goes beyond bit 31 */
450 retval = false;
451 }
452 }
453 *legacy_u32 = src[0];
454 return retval;
455 }
456 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
457
458 /* return false if legacy contained non-0 deprecated fields
459 * maxtxpkt/maxrxpkt. rest of ksettings always updated
460 */
461 static bool
462 convert_legacy_settings_to_link_ksettings(
463 struct ethtool_link_ksettings *link_ksettings,
464 const struct ethtool_cmd *legacy_settings)
465 {
466 bool retval = true;
467
468 memset(link_ksettings, 0, sizeof(*link_ksettings));
469
470 /* This is used to tell users that driver is still using these
471 * deprecated legacy fields, and they should not use
472 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
473 */
474 if (legacy_settings->maxtxpkt ||
475 legacy_settings->maxrxpkt)
476 retval = false;
477
478 ethtool_convert_legacy_u32_to_link_mode(
479 link_ksettings->link_modes.supported,
480 legacy_settings->supported);
481 ethtool_convert_legacy_u32_to_link_mode(
482 link_ksettings->link_modes.advertising,
483 legacy_settings->advertising);
484 ethtool_convert_legacy_u32_to_link_mode(
485 link_ksettings->link_modes.lp_advertising,
486 legacy_settings->lp_advertising);
487 link_ksettings->base.speed
488 = ethtool_cmd_speed(legacy_settings);
489 link_ksettings->base.duplex
490 = legacy_settings->duplex;
491 link_ksettings->base.port
492 = legacy_settings->port;
493 link_ksettings->base.phy_address
494 = legacy_settings->phy_address;
495 link_ksettings->base.autoneg
496 = legacy_settings->autoneg;
497 link_ksettings->base.mdio_support
498 = legacy_settings->mdio_support;
499 link_ksettings->base.eth_tp_mdix
500 = legacy_settings->eth_tp_mdix;
501 link_ksettings->base.eth_tp_mdix_ctrl
502 = legacy_settings->eth_tp_mdix_ctrl;
503 return retval;
504 }
505
506 /* return false if ksettings link modes had higher bits
507 * set. legacy_settings always updated (best effort)
508 */
509 static bool
510 convert_link_ksettings_to_legacy_settings(
511 struct ethtool_cmd *legacy_settings,
512 const struct ethtool_link_ksettings *link_ksettings)
513 {
514 bool retval = true;
515
516 memset(legacy_settings, 0, sizeof(*legacy_settings));
517 /* this also clears the deprecated fields in legacy structure:
518 * __u8 transceiver;
519 * __u32 maxtxpkt;
520 * __u32 maxrxpkt;
521 */
522
523 retval &= ethtool_convert_link_mode_to_legacy_u32(
524 &legacy_settings->supported,
525 link_ksettings->link_modes.supported);
526 retval &= ethtool_convert_link_mode_to_legacy_u32(
527 &legacy_settings->advertising,
528 link_ksettings->link_modes.advertising);
529 retval &= ethtool_convert_link_mode_to_legacy_u32(
530 &legacy_settings->lp_advertising,
531 link_ksettings->link_modes.lp_advertising);
532 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
533 legacy_settings->duplex
534 = link_ksettings->base.duplex;
535 legacy_settings->port
536 = link_ksettings->base.port;
537 legacy_settings->phy_address
538 = link_ksettings->base.phy_address;
539 legacy_settings->autoneg
540 = link_ksettings->base.autoneg;
541 legacy_settings->mdio_support
542 = link_ksettings->base.mdio_support;
543 legacy_settings->eth_tp_mdix
544 = link_ksettings->base.eth_tp_mdix;
545 legacy_settings->eth_tp_mdix_ctrl
546 = link_ksettings->base.eth_tp_mdix_ctrl;
547 legacy_settings->transceiver
548 = link_ksettings->base.transceiver;
549 return retval;
550 }
551
552 /* number of 32-bit words to store the user's link mode bitmaps */
553 #define __ETHTOOL_LINK_MODE_MASK_NU32 \
554 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
555
556 /* layout of the struct passed from/to userland */
557 struct ethtool_link_usettings {
558 struct ethtool_link_settings base;
559 struct {
560 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
561 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
562 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
563 } link_modes;
564 };
565
566 /* Internal kernel helper to query a device ethtool_link_settings.
567 *
568 * Backward compatibility note: for compatibility with legacy drivers
569 * that implement only the ethtool_cmd API, this has to work with both
570 * drivers implementing get_link_ksettings API and drivers
571 * implementing get_settings API. When drivers implement get_settings
572 * and report ethtool_cmd deprecated fields
573 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
574 * because the resulting struct ethtool_link_settings does not report them.
575 */
576 int __ethtool_get_link_ksettings(struct net_device *dev,
577 struct ethtool_link_ksettings *link_ksettings)
578 {
579 int err;
580 struct ethtool_cmd cmd;
581
582 ASSERT_RTNL();
583
584 if (dev->ethtool_ops->get_link_ksettings) {
585 memset(link_ksettings, 0, sizeof(*link_ksettings));
586 return dev->ethtool_ops->get_link_ksettings(dev,
587 link_ksettings);
588 }
589
590 /* driver doesn't support %ethtool_link_ksettings API. revert to
591 * legacy %ethtool_cmd API, unless it's not supported either.
592 * TODO: remove when ethtool_ops::get_settings disappears internally
593 */
594 if (!dev->ethtool_ops->get_settings)
595 return -EOPNOTSUPP;
596
597 memset(&cmd, 0, sizeof(cmd));
598 cmd.cmd = ETHTOOL_GSET;
599 err = dev->ethtool_ops->get_settings(dev, &cmd);
600 if (err < 0)
601 return err;
602
603 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
604 */
605 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
606 return err;
607 }
608 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
609
610 /* convert ethtool_link_usettings in user space to a kernel internal
611 * ethtool_link_ksettings. return 0 on success, errno on error.
612 */
613 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
614 const void __user *from)
615 {
616 struct ethtool_link_usettings link_usettings;
617
618 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
619 return -EFAULT;
620
621 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
622 bitmap_from_arr32(to->link_modes.supported,
623 link_usettings.link_modes.supported,
624 __ETHTOOL_LINK_MODE_MASK_NBITS);
625 bitmap_from_arr32(to->link_modes.advertising,
626 link_usettings.link_modes.advertising,
627 __ETHTOOL_LINK_MODE_MASK_NBITS);
628 bitmap_from_arr32(to->link_modes.lp_advertising,
629 link_usettings.link_modes.lp_advertising,
630 __ETHTOOL_LINK_MODE_MASK_NBITS);
631
632 return 0;
633 }
634
635 /* convert a kernel internal ethtool_link_ksettings to
636 * ethtool_link_usettings in user space. return 0 on success, errno on
637 * error.
638 */
639 static int
640 store_link_ksettings_for_user(void __user *to,
641 const struct ethtool_link_ksettings *from)
642 {
643 struct ethtool_link_usettings link_usettings;
644
645 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
646 bitmap_to_arr32(link_usettings.link_modes.supported,
647 from->link_modes.supported,
648 __ETHTOOL_LINK_MODE_MASK_NBITS);
649 bitmap_to_arr32(link_usettings.link_modes.advertising,
650 from->link_modes.advertising,
651 __ETHTOOL_LINK_MODE_MASK_NBITS);
652 bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
653 from->link_modes.lp_advertising,
654 __ETHTOOL_LINK_MODE_MASK_NBITS);
655
656 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
657 return -EFAULT;
658
659 return 0;
660 }
661
662 /* Query device for its ethtool_link_settings.
663 *
664 * Backward compatibility note: this function must fail when driver
665 * does not implement ethtool::get_link_ksettings, even if legacy
666 * ethtool_ops::get_settings is implemented. This tells new versions
667 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
668 * this driver, so that they can correctly access the ethtool_cmd
669 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
670 * implements ethtool_ops::get_settings anymore.
671 */
672 static int ethtool_get_link_ksettings(struct net_device *dev,
673 void __user *useraddr)
674 {
675 int err = 0;
676 struct ethtool_link_ksettings link_ksettings;
677
678 ASSERT_RTNL();
679
680 if (!dev->ethtool_ops->get_link_ksettings)
681 return -EOPNOTSUPP;
682
683 /* handle bitmap nbits handshake */
684 if (copy_from_user(&link_ksettings.base, useraddr,
685 sizeof(link_ksettings.base)))
686 return -EFAULT;
687
688 if (__ETHTOOL_LINK_MODE_MASK_NU32
689 != link_ksettings.base.link_mode_masks_nwords) {
690 /* wrong link mode nbits requested */
691 memset(&link_ksettings, 0, sizeof(link_ksettings));
692 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
693 /* send back number of words required as negative val */
694 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
695 "need too many bits for link modes!");
696 link_ksettings.base.link_mode_masks_nwords
697 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
698
699 /* copy the base fields back to user, not the link
700 * mode bitmaps
701 */
702 if (copy_to_user(useraddr, &link_ksettings.base,
703 sizeof(link_ksettings.base)))
704 return -EFAULT;
705
706 return 0;
707 }
708
709 /* handshake successful: user/kernel agree on
710 * link_mode_masks_nwords
711 */
712
713 memset(&link_ksettings, 0, sizeof(link_ksettings));
714 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
715 if (err < 0)
716 return err;
717
718 /* make sure we tell the right values to user */
719 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
720 link_ksettings.base.link_mode_masks_nwords
721 = __ETHTOOL_LINK_MODE_MASK_NU32;
722
723 return store_link_ksettings_for_user(useraddr, &link_ksettings);
724 }
725
726 /* Update device ethtool_link_settings.
727 *
728 * Backward compatibility note: this function must fail when driver
729 * does not implement ethtool::set_link_ksettings, even if legacy
730 * ethtool_ops::set_settings is implemented. This tells new versions
731 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
732 * this driver, so that they can correctly update the ethtool_cmd
733 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
734 * implements ethtool_ops::get_settings anymore.
735 */
736 static int ethtool_set_link_ksettings(struct net_device *dev,
737 void __user *useraddr)
738 {
739 int err;
740 struct ethtool_link_ksettings link_ksettings;
741
742 ASSERT_RTNL();
743
744 if (!dev->ethtool_ops->set_link_ksettings)
745 return -EOPNOTSUPP;
746
747 /* make sure nbits field has expected value */
748 if (copy_from_user(&link_ksettings.base, useraddr,
749 sizeof(link_ksettings.base)))
750 return -EFAULT;
751
752 if (__ETHTOOL_LINK_MODE_MASK_NU32
753 != link_ksettings.base.link_mode_masks_nwords)
754 return -EINVAL;
755
756 /* copy the whole structure, now that we know it has expected
757 * format
758 */
759 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
760 if (err)
761 return err;
762
763 /* re-check nwords field, just in case */
764 if (__ETHTOOL_LINK_MODE_MASK_NU32
765 != link_ksettings.base.link_mode_masks_nwords)
766 return -EINVAL;
767
768 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
769 }
770
771 /* Query device for its ethtool_cmd settings.
772 *
773 * Backward compatibility note: for compatibility with legacy ethtool,
774 * this has to work with both drivers implementing get_link_ksettings
775 * API and drivers implementing get_settings API. When drivers
776 * implement get_link_ksettings and report higher link mode bits, a
777 * kernel warning is logged once (with name of 1st driver/device) to
778 * recommend user to upgrade ethtool, but the command is successful
779 * (only the lower link mode bits reported back to user).
780 */
781 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
782 {
783 struct ethtool_cmd cmd;
784
785 ASSERT_RTNL();
786
787 if (dev->ethtool_ops->get_link_ksettings) {
788 /* First, use link_ksettings API if it is supported */
789 int err;
790 struct ethtool_link_ksettings link_ksettings;
791
792 memset(&link_ksettings, 0, sizeof(link_ksettings));
793 err = dev->ethtool_ops->get_link_ksettings(dev,
794 &link_ksettings);
795 if (err < 0)
796 return err;
797 convert_link_ksettings_to_legacy_settings(&cmd,
798 &link_ksettings);
799
800 /* send a sensible cmd tag back to user */
801 cmd.cmd = ETHTOOL_GSET;
802 } else {
803 /* driver doesn't support %ethtool_link_ksettings
804 * API. revert to legacy %ethtool_cmd API, unless it's
805 * not supported either.
806 */
807 int err;
808
809 if (!dev->ethtool_ops->get_settings)
810 return -EOPNOTSUPP;
811
812 memset(&cmd, 0, sizeof(cmd));
813 cmd.cmd = ETHTOOL_GSET;
814 err = dev->ethtool_ops->get_settings(dev, &cmd);
815 if (err < 0)
816 return err;
817 }
818
819 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
820 return -EFAULT;
821
822 return 0;
823 }
824
825 /* Update device link settings with given ethtool_cmd.
826 *
827 * Backward compatibility note: for compatibility with legacy ethtool,
828 * this has to work with both drivers implementing set_link_ksettings
829 * API and drivers implementing set_settings API. When drivers
830 * implement set_link_ksettings and user's request updates deprecated
831 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
832 * warning is logged once (with name of 1st driver/device) to
833 * recommend user to upgrade ethtool, and the request is rejected.
834 */
835 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
836 {
837 struct ethtool_cmd cmd;
838
839 ASSERT_RTNL();
840
841 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
842 return -EFAULT;
843
844 /* first, try new %ethtool_link_ksettings API. */
845 if (dev->ethtool_ops->set_link_ksettings) {
846 struct ethtool_link_ksettings link_ksettings;
847
848 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
849 &cmd))
850 return -EINVAL;
851
852 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
853 link_ksettings.base.link_mode_masks_nwords
854 = __ETHTOOL_LINK_MODE_MASK_NU32;
855 return dev->ethtool_ops->set_link_ksettings(dev,
856 &link_ksettings);
857 }
858
859 /* legacy %ethtool_cmd API */
860
861 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
862 * disappears internally
863 */
864
865 if (!dev->ethtool_ops->set_settings)
866 return -EOPNOTSUPP;
867
868 return dev->ethtool_ops->set_settings(dev, &cmd);
869 }
870
871 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
872 void __user *useraddr)
873 {
874 struct ethtool_drvinfo info;
875 const struct ethtool_ops *ops = dev->ethtool_ops;
876
877 memset(&info, 0, sizeof(info));
878 info.cmd = ETHTOOL_GDRVINFO;
879 if (ops->get_drvinfo) {
880 ops->get_drvinfo(dev, &info);
881 } else if (dev->dev.parent && dev->dev.parent->driver) {
882 strlcpy(info.bus_info, dev_name(dev->dev.parent),
883 sizeof(info.bus_info));
884 strlcpy(info.driver, dev->dev.parent->driver->name,
885 sizeof(info.driver));
886 } else {
887 return -EOPNOTSUPP;
888 }
889
890 /*
891 * this method of obtaining string set info is deprecated;
892 * Use ETHTOOL_GSSET_INFO instead.
893 */
894 if (ops->get_sset_count) {
895 int rc;
896
897 rc = ops->get_sset_count(dev, ETH_SS_TEST);
898 if (rc >= 0)
899 info.testinfo_len = rc;
900 rc = ops->get_sset_count(dev, ETH_SS_STATS);
901 if (rc >= 0)
902 info.n_stats = rc;
903 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
904 if (rc >= 0)
905 info.n_priv_flags = rc;
906 }
907 if (ops->get_regs_len)
908 info.regdump_len = ops->get_regs_len(dev);
909 if (ops->get_eeprom_len)
910 info.eedump_len = ops->get_eeprom_len(dev);
911
912 if (copy_to_user(useraddr, &info, sizeof(info)))
913 return -EFAULT;
914 return 0;
915 }
916
917 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
918 void __user *useraddr)
919 {
920 struct ethtool_sset_info info;
921 u64 sset_mask;
922 int i, idx = 0, n_bits = 0, ret, rc;
923 u32 *info_buf = NULL;
924
925 if (copy_from_user(&info, useraddr, sizeof(info)))
926 return -EFAULT;
927
928 /* store copy of mask, because we zero struct later on */
929 sset_mask = info.sset_mask;
930 if (!sset_mask)
931 return 0;
932
933 /* calculate size of return buffer */
934 n_bits = hweight64(sset_mask);
935
936 memset(&info, 0, sizeof(info));
937 info.cmd = ETHTOOL_GSSET_INFO;
938
939 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
940 if (!info_buf)
941 return -ENOMEM;
942
943 /*
944 * fill return buffer based on input bitmask and successful
945 * get_sset_count return
946 */
947 for (i = 0; i < 64; i++) {
948 if (!(sset_mask & (1ULL << i)))
949 continue;
950
951 rc = __ethtool_get_sset_count(dev, i);
952 if (rc >= 0) {
953 info.sset_mask |= (1ULL << i);
954 info_buf[idx++] = rc;
955 }
956 }
957
958 ret = -EFAULT;
959 if (copy_to_user(useraddr, &info, sizeof(info)))
960 goto out;
961
962 useraddr += offsetof(struct ethtool_sset_info, data);
963 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
964 goto out;
965
966 ret = 0;
967
968 out:
969 kfree(info_buf);
970 return ret;
971 }
972
973 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
974 u32 cmd, void __user *useraddr)
975 {
976 struct ethtool_rxnfc info;
977 size_t info_size = sizeof(info);
978 int rc;
979
980 if (!dev->ethtool_ops->set_rxnfc)
981 return -EOPNOTSUPP;
982
983 /* struct ethtool_rxnfc was originally defined for
984 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
985 * members. User-space might still be using that
986 * definition. */
987 if (cmd == ETHTOOL_SRXFH)
988 info_size = (offsetof(struct ethtool_rxnfc, data) +
989 sizeof(info.data));
990
991 if (copy_from_user(&info, useraddr, info_size))
992 return -EFAULT;
993
994 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
995 if (rc)
996 return rc;
997
998 if (cmd == ETHTOOL_SRXCLSRLINS &&
999 copy_to_user(useraddr, &info, info_size))
1000 return -EFAULT;
1001
1002 return 0;
1003 }
1004
1005 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1006 u32 cmd, void __user *useraddr)
1007 {
1008 struct ethtool_rxnfc info;
1009 size_t info_size = sizeof(info);
1010 const struct ethtool_ops *ops = dev->ethtool_ops;
1011 int ret;
1012 void *rule_buf = NULL;
1013
1014 if (!ops->get_rxnfc)
1015 return -EOPNOTSUPP;
1016
1017 /* struct ethtool_rxnfc was originally defined for
1018 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1019 * members. User-space might still be using that
1020 * definition. */
1021 if (cmd == ETHTOOL_GRXFH)
1022 info_size = (offsetof(struct ethtool_rxnfc, data) +
1023 sizeof(info.data));
1024
1025 if (copy_from_user(&info, useraddr, info_size))
1026 return -EFAULT;
1027
1028 /* If FLOW_RSS was requested then user-space must be using the
1029 * new definition, as FLOW_RSS is newer.
1030 */
1031 if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
1032 info_size = sizeof(info);
1033 if (copy_from_user(&info, useraddr, info_size))
1034 return -EFAULT;
1035 /* Since malicious users may modify the original data,
1036 * we need to check whether FLOW_RSS is still requested.
1037 */
1038 if (!(info.flow_type & FLOW_RSS))
1039 return -EINVAL;
1040 }
1041
1042 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1043 if (info.rule_cnt > 0) {
1044 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1045 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
1046 GFP_USER);
1047 if (!rule_buf)
1048 return -ENOMEM;
1049 }
1050 }
1051
1052 ret = ops->get_rxnfc(dev, &info, rule_buf);
1053 if (ret < 0)
1054 goto err_out;
1055
1056 ret = -EFAULT;
1057 if (copy_to_user(useraddr, &info, info_size))
1058 goto err_out;
1059
1060 if (rule_buf) {
1061 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1062 if (copy_to_user(useraddr, rule_buf,
1063 info.rule_cnt * sizeof(u32)))
1064 goto err_out;
1065 }
1066 ret = 0;
1067
1068 err_out:
1069 kfree(rule_buf);
1070
1071 return ret;
1072 }
1073
1074 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1075 struct ethtool_rxnfc *rx_rings,
1076 u32 size)
1077 {
1078 int i;
1079
1080 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1081 return -EFAULT;
1082
1083 /* Validate ring indices */
1084 for (i = 0; i < size; i++)
1085 if (indir[i] >= rx_rings->data)
1086 return -EINVAL;
1087
1088 return 0;
1089 }
1090
1091 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1092
1093 void netdev_rss_key_fill(void *buffer, size_t len)
1094 {
1095 BUG_ON(len > sizeof(netdev_rss_key));
1096 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1097 memcpy(buffer, netdev_rss_key, len);
1098 }
1099 EXPORT_SYMBOL(netdev_rss_key_fill);
1100
1101 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1102 {
1103 u32 dev_size, current_max = 0;
1104 u32 *indir;
1105 int ret;
1106
1107 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1108 !dev->ethtool_ops->get_rxfh)
1109 return -EOPNOTSUPP;
1110 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1111 if (dev_size == 0)
1112 return -EOPNOTSUPP;
1113
1114 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1115 if (!indir)
1116 return -ENOMEM;
1117
1118 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1119 if (ret)
1120 goto out;
1121
1122 while (dev_size--)
1123 current_max = max(current_max, indir[dev_size]);
1124
1125 *max = current_max;
1126
1127 out:
1128 kfree(indir);
1129 return ret;
1130 }
1131
1132 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1133 void __user *useraddr)
1134 {
1135 u32 user_size, dev_size;
1136 u32 *indir;
1137 int ret;
1138
1139 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1140 !dev->ethtool_ops->get_rxfh)
1141 return -EOPNOTSUPP;
1142 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1143 if (dev_size == 0)
1144 return -EOPNOTSUPP;
1145
1146 if (copy_from_user(&user_size,
1147 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1148 sizeof(user_size)))
1149 return -EFAULT;
1150
1151 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1152 &dev_size, sizeof(dev_size)))
1153 return -EFAULT;
1154
1155 /* If the user buffer size is 0, this is just a query for the
1156 * device table size. Otherwise, if it's smaller than the
1157 * device table size it's an error.
1158 */
1159 if (user_size < dev_size)
1160 return user_size == 0 ? 0 : -EINVAL;
1161
1162 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1163 if (!indir)
1164 return -ENOMEM;
1165
1166 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1167 if (ret)
1168 goto out;
1169
1170 if (copy_to_user(useraddr +
1171 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1172 indir, dev_size * sizeof(indir[0])))
1173 ret = -EFAULT;
1174
1175 out:
1176 kfree(indir);
1177 return ret;
1178 }
1179
1180 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1181 void __user *useraddr)
1182 {
1183 struct ethtool_rxnfc rx_rings;
1184 u32 user_size, dev_size, i;
1185 u32 *indir;
1186 const struct ethtool_ops *ops = dev->ethtool_ops;
1187 int ret;
1188 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1189
1190 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1191 !ops->get_rxnfc)
1192 return -EOPNOTSUPP;
1193
1194 dev_size = ops->get_rxfh_indir_size(dev);
1195 if (dev_size == 0)
1196 return -EOPNOTSUPP;
1197
1198 if (copy_from_user(&user_size,
1199 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1200 sizeof(user_size)))
1201 return -EFAULT;
1202
1203 if (user_size != 0 && user_size != dev_size)
1204 return -EINVAL;
1205
1206 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1207 if (!indir)
1208 return -ENOMEM;
1209
1210 rx_rings.cmd = ETHTOOL_GRXRINGS;
1211 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1212 if (ret)
1213 goto out;
1214
1215 if (user_size == 0) {
1216 for (i = 0; i < dev_size; i++)
1217 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1218 } else {
1219 ret = ethtool_copy_validate_indir(indir,
1220 useraddr + ringidx_offset,
1221 &rx_rings,
1222 dev_size);
1223 if (ret)
1224 goto out;
1225 }
1226
1227 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1228 if (ret)
1229 goto out;
1230
1231 /* indicate whether rxfh was set to default */
1232 if (user_size == 0)
1233 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1234 else
1235 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1236
1237 out:
1238 kfree(indir);
1239 return ret;
1240 }
1241
1242 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1243 void __user *useraddr)
1244 {
1245 int ret;
1246 const struct ethtool_ops *ops = dev->ethtool_ops;
1247 u32 user_indir_size, user_key_size;
1248 u32 dev_indir_size = 0, dev_key_size = 0;
1249 struct ethtool_rxfh rxfh;
1250 u32 total_size;
1251 u32 indir_bytes;
1252 u32 *indir = NULL;
1253 u8 dev_hfunc = 0;
1254 u8 *hkey = NULL;
1255 u8 *rss_config;
1256
1257 if (!ops->get_rxfh)
1258 return -EOPNOTSUPP;
1259
1260 if (ops->get_rxfh_indir_size)
1261 dev_indir_size = ops->get_rxfh_indir_size(dev);
1262 if (ops->get_rxfh_key_size)
1263 dev_key_size = ops->get_rxfh_key_size(dev);
1264
1265 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1266 return -EFAULT;
1267 user_indir_size = rxfh.indir_size;
1268 user_key_size = rxfh.key_size;
1269
1270 /* Check that reserved fields are 0 for now */
1271 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1272 return -EINVAL;
1273 /* Most drivers don't handle rss_context, check it's 0 as well */
1274 if (rxfh.rss_context && !ops->get_rxfh_context)
1275 return -EOPNOTSUPP;
1276
1277 rxfh.indir_size = dev_indir_size;
1278 rxfh.key_size = dev_key_size;
1279 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1280 return -EFAULT;
1281
1282 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1283 (user_key_size && (user_key_size != dev_key_size)))
1284 return -EINVAL;
1285
1286 indir_bytes = user_indir_size * sizeof(indir[0]);
1287 total_size = indir_bytes + user_key_size;
1288 rss_config = kzalloc(total_size, GFP_USER);
1289 if (!rss_config)
1290 return -ENOMEM;
1291
1292 if (user_indir_size)
1293 indir = (u32 *)rss_config;
1294
1295 if (user_key_size)
1296 hkey = rss_config + indir_bytes;
1297
1298 if (rxfh.rss_context)
1299 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1300 &dev_hfunc,
1301 rxfh.rss_context);
1302 else
1303 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1304 if (ret)
1305 goto out;
1306
1307 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1308 &dev_hfunc, sizeof(rxfh.hfunc))) {
1309 ret = -EFAULT;
1310 } else if (copy_to_user(useraddr +
1311 offsetof(struct ethtool_rxfh, rss_config[0]),
1312 rss_config, total_size)) {
1313 ret = -EFAULT;
1314 }
1315 out:
1316 kfree(rss_config);
1317
1318 return ret;
1319 }
1320
1321 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1322 void __user *useraddr)
1323 {
1324 int ret;
1325 const struct ethtool_ops *ops = dev->ethtool_ops;
1326 struct ethtool_rxnfc rx_rings;
1327 struct ethtool_rxfh rxfh;
1328 u32 dev_indir_size = 0, dev_key_size = 0, i;
1329 u32 *indir = NULL, indir_bytes = 0;
1330 u8 *hkey = NULL;
1331 u8 *rss_config;
1332 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1333 bool delete = false;
1334
1335 if (!ops->get_rxnfc || !ops->set_rxfh)
1336 return -EOPNOTSUPP;
1337
1338 if (ops->get_rxfh_indir_size)
1339 dev_indir_size = ops->get_rxfh_indir_size(dev);
1340 if (ops->get_rxfh_key_size)
1341 dev_key_size = ops->get_rxfh_key_size(dev);
1342
1343 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1344 return -EFAULT;
1345
1346 /* Check that reserved fields are 0 for now */
1347 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1348 return -EINVAL;
1349 /* Most drivers don't handle rss_context, check it's 0 as well */
1350 if (rxfh.rss_context && !ops->set_rxfh_context)
1351 return -EOPNOTSUPP;
1352
1353 /* If either indir, hash key or function is valid, proceed further.
1354 * Must request at least one change: indir size, hash key or function.
1355 */
1356 if ((rxfh.indir_size &&
1357 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1358 rxfh.indir_size != dev_indir_size) ||
1359 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1360 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1361 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1362 return -EINVAL;
1363
1364 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1365 indir_bytes = dev_indir_size * sizeof(indir[0]);
1366
1367 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1368 if (!rss_config)
1369 return -ENOMEM;
1370
1371 rx_rings.cmd = ETHTOOL_GRXRINGS;
1372 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1373 if (ret)
1374 goto out;
1375
1376 /* rxfh.indir_size == 0 means reset the indir table to default (master
1377 * context) or delete the context (other RSS contexts).
1378 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1379 */
1380 if (rxfh.indir_size &&
1381 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1382 indir = (u32 *)rss_config;
1383 ret = ethtool_copy_validate_indir(indir,
1384 useraddr + rss_cfg_offset,
1385 &rx_rings,
1386 rxfh.indir_size);
1387 if (ret)
1388 goto out;
1389 } else if (rxfh.indir_size == 0) {
1390 if (rxfh.rss_context == 0) {
1391 indir = (u32 *)rss_config;
1392 for (i = 0; i < dev_indir_size; i++)
1393 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1394 } else {
1395 delete = true;
1396 }
1397 }
1398
1399 if (rxfh.key_size) {
1400 hkey = rss_config + indir_bytes;
1401 if (copy_from_user(hkey,
1402 useraddr + rss_cfg_offset + indir_bytes,
1403 rxfh.key_size)) {
1404 ret = -EFAULT;
1405 goto out;
1406 }
1407 }
1408
1409 if (rxfh.rss_context)
1410 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1411 &rxfh.rss_context, delete);
1412 else
1413 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1414 if (ret)
1415 goto out;
1416
1417 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1418 &rxfh.rss_context, sizeof(rxfh.rss_context)))
1419 ret = -EFAULT;
1420
1421 if (!rxfh.rss_context) {
1422 /* indicate whether rxfh was set to default */
1423 if (rxfh.indir_size == 0)
1424 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1425 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1426 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1427 }
1428
1429 out:
1430 kfree(rss_config);
1431 return ret;
1432 }
1433
1434 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1435 {
1436 struct ethtool_regs regs;
1437 const struct ethtool_ops *ops = dev->ethtool_ops;
1438 void *regbuf;
1439 int reglen, ret;
1440
1441 if (!ops->get_regs || !ops->get_regs_len)
1442 return -EOPNOTSUPP;
1443
1444 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1445 return -EFAULT;
1446
1447 reglen = ops->get_regs_len(dev);
1448 if (regs.len > reglen)
1449 regs.len = reglen;
1450
1451 regbuf = NULL;
1452 if (reglen) {
1453 regbuf = vzalloc(reglen);
1454 if (!regbuf)
1455 return -ENOMEM;
1456 }
1457
1458 ops->get_regs(dev, &regs, regbuf);
1459
1460 ret = -EFAULT;
1461 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1462 goto out;
1463 useraddr += offsetof(struct ethtool_regs, data);
1464 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1465 goto out;
1466 ret = 0;
1467
1468 out:
1469 vfree(regbuf);
1470 return ret;
1471 }
1472
1473 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1474 {
1475 struct ethtool_value reset;
1476 int ret;
1477
1478 if (!dev->ethtool_ops->reset)
1479 return -EOPNOTSUPP;
1480
1481 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1482 return -EFAULT;
1483
1484 ret = dev->ethtool_ops->reset(dev, &reset.data);
1485 if (ret)
1486 return ret;
1487
1488 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1489 return -EFAULT;
1490 return 0;
1491 }
1492
1493 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1494 {
1495 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1496
1497 if (!dev->ethtool_ops->get_wol)
1498 return -EOPNOTSUPP;
1499
1500 dev->ethtool_ops->get_wol(dev, &wol);
1501
1502 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1503 return -EFAULT;
1504 return 0;
1505 }
1506
1507 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1508 {
1509 struct ethtool_wolinfo wol;
1510
1511 if (!dev->ethtool_ops->set_wol)
1512 return -EOPNOTSUPP;
1513
1514 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1515 return -EFAULT;
1516
1517 return dev->ethtool_ops->set_wol(dev, &wol);
1518 }
1519
1520 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1521 {
1522 struct ethtool_eee edata;
1523 int rc;
1524
1525 if (!dev->ethtool_ops->get_eee)
1526 return -EOPNOTSUPP;
1527
1528 memset(&edata, 0, sizeof(struct ethtool_eee));
1529 edata.cmd = ETHTOOL_GEEE;
1530 rc = dev->ethtool_ops->get_eee(dev, &edata);
1531
1532 if (rc)
1533 return rc;
1534
1535 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1536 return -EFAULT;
1537
1538 return 0;
1539 }
1540
1541 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1542 {
1543 struct ethtool_eee edata;
1544
1545 if (!dev->ethtool_ops->set_eee)
1546 return -EOPNOTSUPP;
1547
1548 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1549 return -EFAULT;
1550
1551 return dev->ethtool_ops->set_eee(dev, &edata);
1552 }
1553
1554 static int ethtool_nway_reset(struct net_device *dev)
1555 {
1556 if (!dev->ethtool_ops->nway_reset)
1557 return -EOPNOTSUPP;
1558
1559 return dev->ethtool_ops->nway_reset(dev);
1560 }
1561
1562 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1563 {
1564 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1565
1566 if (!dev->ethtool_ops->get_link)
1567 return -EOPNOTSUPP;
1568
1569 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1570
1571 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1572 return -EFAULT;
1573 return 0;
1574 }
1575
1576 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1577 int (*getter)(struct net_device *,
1578 struct ethtool_eeprom *, u8 *),
1579 u32 total_len)
1580 {
1581 struct ethtool_eeprom eeprom;
1582 void __user *userbuf = useraddr + sizeof(eeprom);
1583 u32 bytes_remaining;
1584 u8 *data;
1585 int ret = 0;
1586
1587 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1588 return -EFAULT;
1589
1590 /* Check for wrap and zero */
1591 if (eeprom.offset + eeprom.len <= eeprom.offset)
1592 return -EINVAL;
1593
1594 /* Check for exceeding total eeprom len */
1595 if (eeprom.offset + eeprom.len > total_len)
1596 return -EINVAL;
1597
1598 data = kmalloc(PAGE_SIZE, GFP_USER);
1599 if (!data)
1600 return -ENOMEM;
1601
1602 bytes_remaining = eeprom.len;
1603 while (bytes_remaining > 0) {
1604 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1605
1606 ret = getter(dev, &eeprom, data);
1607 if (ret)
1608 break;
1609 if (copy_to_user(userbuf, data, eeprom.len)) {
1610 ret = -EFAULT;
1611 break;
1612 }
1613 userbuf += eeprom.len;
1614 eeprom.offset += eeprom.len;
1615 bytes_remaining -= eeprom.len;
1616 }
1617
1618 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1619 eeprom.offset -= eeprom.len;
1620 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1621 ret = -EFAULT;
1622
1623 kfree(data);
1624 return ret;
1625 }
1626
1627 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1628 {
1629 const struct ethtool_ops *ops = dev->ethtool_ops;
1630
1631 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1632 !ops->get_eeprom_len(dev))
1633 return -EOPNOTSUPP;
1634
1635 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1636 ops->get_eeprom_len(dev));
1637 }
1638
1639 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1640 {
1641 struct ethtool_eeprom eeprom;
1642 const struct ethtool_ops *ops = dev->ethtool_ops;
1643 void __user *userbuf = useraddr + sizeof(eeprom);
1644 u32 bytes_remaining;
1645 u8 *data;
1646 int ret = 0;
1647
1648 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1649 !ops->get_eeprom_len(dev))
1650 return -EOPNOTSUPP;
1651
1652 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1653 return -EFAULT;
1654
1655 /* Check for wrap and zero */
1656 if (eeprom.offset + eeprom.len <= eeprom.offset)
1657 return -EINVAL;
1658
1659 /* Check for exceeding total eeprom len */
1660 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1661 return -EINVAL;
1662
1663 data = kmalloc(PAGE_SIZE, GFP_USER);
1664 if (!data)
1665 return -ENOMEM;
1666
1667 bytes_remaining = eeprom.len;
1668 while (bytes_remaining > 0) {
1669 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1670
1671 if (copy_from_user(data, userbuf, eeprom.len)) {
1672 ret = -EFAULT;
1673 break;
1674 }
1675 ret = ops->set_eeprom(dev, &eeprom, data);
1676 if (ret)
1677 break;
1678 userbuf += eeprom.len;
1679 eeprom.offset += eeprom.len;
1680 bytes_remaining -= eeprom.len;
1681 }
1682
1683 kfree(data);
1684 return ret;
1685 }
1686
1687 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1688 void __user *useraddr)
1689 {
1690 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1691
1692 if (!dev->ethtool_ops->get_coalesce)
1693 return -EOPNOTSUPP;
1694
1695 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1696
1697 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1698 return -EFAULT;
1699 return 0;
1700 }
1701
1702 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1703 void __user *useraddr)
1704 {
1705 struct ethtool_coalesce coalesce;
1706
1707 if (!dev->ethtool_ops->set_coalesce)
1708 return -EOPNOTSUPP;
1709
1710 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1711 return -EFAULT;
1712
1713 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1714 }
1715
1716 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1717 {
1718 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1719
1720 if (!dev->ethtool_ops->get_ringparam)
1721 return -EOPNOTSUPP;
1722
1723 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1724
1725 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1726 return -EFAULT;
1727 return 0;
1728 }
1729
1730 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1731 {
1732 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1733
1734 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1735 return -EOPNOTSUPP;
1736
1737 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1738 return -EFAULT;
1739
1740 dev->ethtool_ops->get_ringparam(dev, &max);
1741
1742 /* ensure new ring parameters are within the maximums */
1743 if (ringparam.rx_pending > max.rx_max_pending ||
1744 ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1745 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1746 ringparam.tx_pending > max.tx_max_pending)
1747 return -EINVAL;
1748
1749 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1750 }
1751
1752 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1753 void __user *useraddr)
1754 {
1755 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1756
1757 if (!dev->ethtool_ops->get_channels)
1758 return -EOPNOTSUPP;
1759
1760 dev->ethtool_ops->get_channels(dev, &channels);
1761
1762 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1763 return -EFAULT;
1764 return 0;
1765 }
1766
1767 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1768 void __user *useraddr)
1769 {
1770 struct ethtool_channels channels, max = { .cmd = ETHTOOL_GCHANNELS };
1771 u32 max_rx_in_use = 0;
1772
1773 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1774 return -EOPNOTSUPP;
1775
1776 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1777 return -EFAULT;
1778
1779 dev->ethtool_ops->get_channels(dev, &max);
1780
1781 /* ensure new counts are within the maximums */
1782 if ((channels.rx_count > max.max_rx) ||
1783 (channels.tx_count > max.max_tx) ||
1784 (channels.combined_count > max.max_combined) ||
1785 (channels.other_count > max.max_other))
1786 return -EINVAL;
1787
1788 /* ensure the new Rx count fits within the configured Rx flow
1789 * indirection table settings */
1790 if (netif_is_rxfh_configured(dev) &&
1791 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1792 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1793 return -EINVAL;
1794
1795 return dev->ethtool_ops->set_channels(dev, &channels);
1796 }
1797
1798 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1799 {
1800 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1801
1802 if (!dev->ethtool_ops->get_pauseparam)
1803 return -EOPNOTSUPP;
1804
1805 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1806
1807 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1808 return -EFAULT;
1809 return 0;
1810 }
1811
1812 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1813 {
1814 struct ethtool_pauseparam pauseparam;
1815
1816 if (!dev->ethtool_ops->set_pauseparam)
1817 return -EOPNOTSUPP;
1818
1819 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1820 return -EFAULT;
1821
1822 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1823 }
1824
1825 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1826 {
1827 struct ethtool_test test;
1828 const struct ethtool_ops *ops = dev->ethtool_ops;
1829 u64 *data;
1830 int ret, test_len;
1831
1832 if (!ops->self_test || !ops->get_sset_count)
1833 return -EOPNOTSUPP;
1834
1835 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1836 if (test_len < 0)
1837 return test_len;
1838 WARN_ON(test_len == 0);
1839
1840 if (copy_from_user(&test, useraddr, sizeof(test)))
1841 return -EFAULT;
1842
1843 test.len = test_len;
1844 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1845 if (!data)
1846 return -ENOMEM;
1847
1848 ops->self_test(dev, &test, data);
1849
1850 ret = -EFAULT;
1851 if (copy_to_user(useraddr, &test, sizeof(test)))
1852 goto out;
1853 useraddr += sizeof(test);
1854 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1855 goto out;
1856 ret = 0;
1857
1858 out:
1859 kfree(data);
1860 return ret;
1861 }
1862
1863 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1864 {
1865 struct ethtool_gstrings gstrings;
1866 u8 *data;
1867 int ret;
1868
1869 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1870 return -EFAULT;
1871
1872 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1873 if (ret < 0)
1874 return ret;
1875 if (ret > S32_MAX / ETH_GSTRING_LEN)
1876 return -ENOMEM;
1877 WARN_ON_ONCE(!ret);
1878
1879 gstrings.len = ret;
1880 data = vzalloc(gstrings.len * ETH_GSTRING_LEN);
1881 if (gstrings.len && !data)
1882 return -ENOMEM;
1883
1884 __ethtool_get_strings(dev, gstrings.string_set, data);
1885
1886 ret = -EFAULT;
1887 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1888 goto out;
1889 useraddr += sizeof(gstrings);
1890 if (gstrings.len &&
1891 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1892 goto out;
1893 ret = 0;
1894
1895 out:
1896 vfree(data);
1897 return ret;
1898 }
1899
1900 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1901 {
1902 struct ethtool_value id;
1903 static bool busy;
1904 const struct ethtool_ops *ops = dev->ethtool_ops;
1905 int rc;
1906
1907 if (!ops->set_phys_id)
1908 return -EOPNOTSUPP;
1909
1910 if (busy)
1911 return -EBUSY;
1912
1913 if (copy_from_user(&id, useraddr, sizeof(id)))
1914 return -EFAULT;
1915
1916 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1917 if (rc < 0)
1918 return rc;
1919
1920 /* Drop the RTNL lock while waiting, but prevent reentry or
1921 * removal of the device.
1922 */
1923 busy = true;
1924 dev_hold(dev);
1925 rtnl_unlock();
1926
1927 if (rc == 0) {
1928 /* Driver will handle this itself */
1929 schedule_timeout_interruptible(
1930 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1931 } else {
1932 /* Driver expects to be called at twice the frequency in rc */
1933 int n = rc * 2, i, interval = HZ / n;
1934
1935 /* Count down seconds */
1936 do {
1937 /* Count down iterations per second */
1938 i = n;
1939 do {
1940 rtnl_lock();
1941 rc = ops->set_phys_id(dev,
1942 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1943 rtnl_unlock();
1944 if (rc)
1945 break;
1946 schedule_timeout_interruptible(interval);
1947 } while (!signal_pending(current) && --i != 0);
1948 } while (!signal_pending(current) &&
1949 (id.data == 0 || --id.data != 0));
1950 }
1951
1952 rtnl_lock();
1953 dev_put(dev);
1954 busy = false;
1955
1956 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1957 return rc;
1958 }
1959
1960 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1961 {
1962 struct ethtool_stats stats;
1963 const struct ethtool_ops *ops = dev->ethtool_ops;
1964 u64 *data;
1965 int ret, n_stats;
1966
1967 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1968 return -EOPNOTSUPP;
1969
1970 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1971 if (n_stats < 0)
1972 return n_stats;
1973 if (n_stats > S32_MAX / sizeof(u64))
1974 return -ENOMEM;
1975 WARN_ON_ONCE(!n_stats);
1976 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1977 return -EFAULT;
1978
1979 stats.n_stats = n_stats;
1980 data = vzalloc(n_stats * sizeof(u64));
1981 if (n_stats && !data)
1982 return -ENOMEM;
1983
1984 ops->get_ethtool_stats(dev, &stats, data);
1985
1986 ret = -EFAULT;
1987 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1988 goto out;
1989 useraddr += sizeof(stats);
1990 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1991 goto out;
1992 ret = 0;
1993
1994 out:
1995 vfree(data);
1996 return ret;
1997 }
1998
1999 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2000 {
2001 struct ethtool_stats stats;
2002 struct phy_device *phydev = dev->phydev;
2003 u64 *data;
2004 int ret, n_stats;
2005
2006 if (!phydev)
2007 return -EOPNOTSUPP;
2008
2009 n_stats = phy_get_sset_count(phydev);
2010 if (n_stats < 0)
2011 return n_stats;
2012 if (n_stats > S32_MAX / sizeof(u64))
2013 return -ENOMEM;
2014 WARN_ON_ONCE(!n_stats);
2015
2016 if (copy_from_user(&stats, useraddr, sizeof(stats)))
2017 return -EFAULT;
2018
2019 stats.n_stats = n_stats;
2020 data = vzalloc(n_stats * sizeof(u64));
2021 if (n_stats && !data)
2022 return -ENOMEM;
2023
2024 mutex_lock(&phydev->lock);
2025 phydev->drv->get_stats(phydev, &stats, data);
2026 mutex_unlock(&phydev->lock);
2027
2028 ret = -EFAULT;
2029 if (copy_to_user(useraddr, &stats, sizeof(stats)))
2030 goto out;
2031 useraddr += sizeof(stats);
2032 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
2033 goto out;
2034 ret = 0;
2035
2036 out:
2037 vfree(data);
2038 return ret;
2039 }
2040
2041 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2042 {
2043 struct ethtool_perm_addr epaddr;
2044
2045 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2046 return -EFAULT;
2047
2048 if (epaddr.size < dev->addr_len)
2049 return -ETOOSMALL;
2050 epaddr.size = dev->addr_len;
2051
2052 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2053 return -EFAULT;
2054 useraddr += sizeof(epaddr);
2055 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2056 return -EFAULT;
2057 return 0;
2058 }
2059
2060 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2061 u32 cmd, u32 (*actor)(struct net_device *))
2062 {
2063 struct ethtool_value edata = { .cmd = cmd };
2064
2065 if (!actor)
2066 return -EOPNOTSUPP;
2067
2068 edata.data = actor(dev);
2069
2070 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2071 return -EFAULT;
2072 return 0;
2073 }
2074
2075 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2076 void (*actor)(struct net_device *, u32))
2077 {
2078 struct ethtool_value edata;
2079
2080 if (!actor)
2081 return -EOPNOTSUPP;
2082
2083 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2084 return -EFAULT;
2085
2086 actor(dev, edata.data);
2087 return 0;
2088 }
2089
2090 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2091 int (*actor)(struct net_device *, u32))
2092 {
2093 struct ethtool_value edata;
2094
2095 if (!actor)
2096 return -EOPNOTSUPP;
2097
2098 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2099 return -EFAULT;
2100
2101 return actor(dev, edata.data);
2102 }
2103
2104 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2105 char __user *useraddr)
2106 {
2107 struct ethtool_flash efl;
2108
2109 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2110 return -EFAULT;
2111
2112 if (!dev->ethtool_ops->flash_device)
2113 return -EOPNOTSUPP;
2114
2115 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2116
2117 return dev->ethtool_ops->flash_device(dev, &efl);
2118 }
2119
2120 static int ethtool_set_dump(struct net_device *dev,
2121 void __user *useraddr)
2122 {
2123 struct ethtool_dump dump;
2124
2125 if (!dev->ethtool_ops->set_dump)
2126 return -EOPNOTSUPP;
2127
2128 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2129 return -EFAULT;
2130
2131 return dev->ethtool_ops->set_dump(dev, &dump);
2132 }
2133
2134 static int ethtool_get_dump_flag(struct net_device *dev,
2135 void __user *useraddr)
2136 {
2137 int ret;
2138 struct ethtool_dump dump;
2139 const struct ethtool_ops *ops = dev->ethtool_ops;
2140
2141 if (!ops->get_dump_flag)
2142 return -EOPNOTSUPP;
2143
2144 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2145 return -EFAULT;
2146
2147 ret = ops->get_dump_flag(dev, &dump);
2148 if (ret)
2149 return ret;
2150
2151 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2152 return -EFAULT;
2153 return 0;
2154 }
2155
2156 static int ethtool_get_dump_data(struct net_device *dev,
2157 void __user *useraddr)
2158 {
2159 int ret;
2160 __u32 len;
2161 struct ethtool_dump dump, tmp;
2162 const struct ethtool_ops *ops = dev->ethtool_ops;
2163 void *data = NULL;
2164
2165 if (!ops->get_dump_data || !ops->get_dump_flag)
2166 return -EOPNOTSUPP;
2167
2168 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2169 return -EFAULT;
2170
2171 memset(&tmp, 0, sizeof(tmp));
2172 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2173 ret = ops->get_dump_flag(dev, &tmp);
2174 if (ret)
2175 return ret;
2176
2177 len = min(tmp.len, dump.len);
2178 if (!len)
2179 return -EFAULT;
2180
2181 /* Don't ever let the driver think there's more space available
2182 * than it requested with .get_dump_flag().
2183 */
2184 dump.len = len;
2185
2186 /* Always allocate enough space to hold the whole thing so that the
2187 * driver does not need to check the length and bother with partial
2188 * dumping.
2189 */
2190 data = vzalloc(tmp.len);
2191 if (!data)
2192 return -ENOMEM;
2193 ret = ops->get_dump_data(dev, &dump, data);
2194 if (ret)
2195 goto out;
2196
2197 /* There are two sane possibilities:
2198 * 1. The driver's .get_dump_data() does not touch dump.len.
2199 * 2. Or it may set dump.len to how much it really writes, which
2200 * should be tmp.len (or len if it can do a partial dump).
2201 * In any case respond to userspace with the actual length of data
2202 * it's receiving.
2203 */
2204 WARN_ON(dump.len != len && dump.len != tmp.len);
2205 dump.len = len;
2206
2207 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2208 ret = -EFAULT;
2209 goto out;
2210 }
2211 useraddr += offsetof(struct ethtool_dump, data);
2212 if (copy_to_user(useraddr, data, len))
2213 ret = -EFAULT;
2214 out:
2215 vfree(data);
2216 return ret;
2217 }
2218
2219 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2220 {
2221 int err = 0;
2222 struct ethtool_ts_info info;
2223 const struct ethtool_ops *ops = dev->ethtool_ops;
2224 struct phy_device *phydev = dev->phydev;
2225
2226 memset(&info, 0, sizeof(info));
2227 info.cmd = ETHTOOL_GET_TS_INFO;
2228
2229 if (phydev && phydev->drv && phydev->drv->ts_info) {
2230 err = phydev->drv->ts_info(phydev, &info);
2231 } else if (ops->get_ts_info) {
2232 err = ops->get_ts_info(dev, &info);
2233 } else {
2234 info.so_timestamping =
2235 SOF_TIMESTAMPING_RX_SOFTWARE |
2236 SOF_TIMESTAMPING_SOFTWARE;
2237 info.phc_index = -1;
2238 }
2239
2240 if (err)
2241 return err;
2242
2243 if (copy_to_user(useraddr, &info, sizeof(info)))
2244 err = -EFAULT;
2245
2246 return err;
2247 }
2248
2249 static int __ethtool_get_module_info(struct net_device *dev,
2250 struct ethtool_modinfo *modinfo)
2251 {
2252 const struct ethtool_ops *ops = dev->ethtool_ops;
2253 struct phy_device *phydev = dev->phydev;
2254
2255 if (dev->sfp_bus)
2256 return sfp_get_module_info(dev->sfp_bus, modinfo);
2257
2258 if (phydev && phydev->drv && phydev->drv->module_info)
2259 return phydev->drv->module_info(phydev, modinfo);
2260
2261 if (ops->get_module_info)
2262 return ops->get_module_info(dev, modinfo);
2263
2264 return -EOPNOTSUPP;
2265 }
2266
2267 static int ethtool_get_module_info(struct net_device *dev,
2268 void __user *useraddr)
2269 {
2270 int ret;
2271 struct ethtool_modinfo modinfo;
2272
2273 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2274 return -EFAULT;
2275
2276 ret = __ethtool_get_module_info(dev, &modinfo);
2277 if (ret)
2278 return ret;
2279
2280 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2281 return -EFAULT;
2282
2283 return 0;
2284 }
2285
2286 static int __ethtool_get_module_eeprom(struct net_device *dev,
2287 struct ethtool_eeprom *ee, u8 *data)
2288 {
2289 const struct ethtool_ops *ops = dev->ethtool_ops;
2290 struct phy_device *phydev = dev->phydev;
2291
2292 if (dev->sfp_bus)
2293 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2294
2295 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2296 return phydev->drv->module_eeprom(phydev, ee, data);
2297
2298 if (ops->get_module_eeprom)
2299 return ops->get_module_eeprom(dev, ee, data);
2300
2301 return -EOPNOTSUPP;
2302 }
2303
2304 static int ethtool_get_module_eeprom(struct net_device *dev,
2305 void __user *useraddr)
2306 {
2307 int ret;
2308 struct ethtool_modinfo modinfo;
2309
2310 ret = __ethtool_get_module_info(dev, &modinfo);
2311 if (ret)
2312 return ret;
2313
2314 return ethtool_get_any_eeprom(dev, useraddr,
2315 __ethtool_get_module_eeprom,
2316 modinfo.eeprom_len);
2317 }
2318
2319 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2320 {
2321 switch (tuna->id) {
2322 case ETHTOOL_RX_COPYBREAK:
2323 case ETHTOOL_TX_COPYBREAK:
2324 if (tuna->len != sizeof(u32) ||
2325 tuna->type_id != ETHTOOL_TUNABLE_U32)
2326 return -EINVAL;
2327 break;
2328 case ETHTOOL_PFC_PREVENTION_TOUT:
2329 if (tuna->len != sizeof(u16) ||
2330 tuna->type_id != ETHTOOL_TUNABLE_U16)
2331 return -EINVAL;
2332 break;
2333 default:
2334 return -EINVAL;
2335 }
2336
2337 return 0;
2338 }
2339
2340 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2341 {
2342 int ret;
2343 struct ethtool_tunable tuna;
2344 const struct ethtool_ops *ops = dev->ethtool_ops;
2345 void *data;
2346
2347 if (!ops->get_tunable)
2348 return -EOPNOTSUPP;
2349 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2350 return -EFAULT;
2351 ret = ethtool_tunable_valid(&tuna);
2352 if (ret)
2353 return ret;
2354 data = kmalloc(tuna.len, GFP_USER);
2355 if (!data)
2356 return -ENOMEM;
2357 ret = ops->get_tunable(dev, &tuna, data);
2358 if (ret)
2359 goto out;
2360 useraddr += sizeof(tuna);
2361 ret = -EFAULT;
2362 if (copy_to_user(useraddr, data, tuna.len))
2363 goto out;
2364 ret = 0;
2365
2366 out:
2367 kfree(data);
2368 return ret;
2369 }
2370
2371 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2372 {
2373 int ret;
2374 struct ethtool_tunable tuna;
2375 const struct ethtool_ops *ops = dev->ethtool_ops;
2376 void *data;
2377
2378 if (!ops->set_tunable)
2379 return -EOPNOTSUPP;
2380 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2381 return -EFAULT;
2382 ret = ethtool_tunable_valid(&tuna);
2383 if (ret)
2384 return ret;
2385 useraddr += sizeof(tuna);
2386 data = memdup_user(useraddr, tuna.len);
2387 if (IS_ERR(data))
2388 return PTR_ERR(data);
2389 ret = ops->set_tunable(dev, &tuna, data);
2390
2391 kfree(data);
2392 return ret;
2393 }
2394
2395 static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2396 void __user *useraddr,
2397 struct ethtool_per_queue_op *per_queue_opt)
2398 {
2399 u32 bit;
2400 int ret;
2401 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2402
2403 if (!dev->ethtool_ops->get_per_queue_coalesce)
2404 return -EOPNOTSUPP;
2405
2406 useraddr += sizeof(*per_queue_opt);
2407
2408 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2409 MAX_NUM_QUEUE);
2410
2411 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2412 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2413
2414 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2415 if (ret != 0)
2416 return ret;
2417 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2418 return -EFAULT;
2419 useraddr += sizeof(coalesce);
2420 }
2421
2422 return 0;
2423 }
2424
2425 static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2426 void __user *useraddr,
2427 struct ethtool_per_queue_op *per_queue_opt)
2428 {
2429 u32 bit;
2430 int i, ret = 0;
2431 int n_queue;
2432 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2433 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2434
2435 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2436 (!dev->ethtool_ops->get_per_queue_coalesce))
2437 return -EOPNOTSUPP;
2438
2439 useraddr += sizeof(*per_queue_opt);
2440
2441 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2442 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2443 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2444 if (!backup)
2445 return -ENOMEM;
2446
2447 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2448 struct ethtool_coalesce coalesce;
2449
2450 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2451 if (ret != 0)
2452 goto roll_back;
2453
2454 tmp++;
2455
2456 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2457 ret = -EFAULT;
2458 goto roll_back;
2459 }
2460
2461 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2462 if (ret != 0)
2463 goto roll_back;
2464
2465 useraddr += sizeof(coalesce);
2466 }
2467
2468 roll_back:
2469 if (ret != 0) {
2470 tmp = backup;
2471 for_each_set_bit(i, queue_mask, bit) {
2472 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2473 tmp++;
2474 }
2475 }
2476 kfree(backup);
2477
2478 return ret;
2479 }
2480
2481 static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2482 {
2483 struct ethtool_per_queue_op per_queue_opt;
2484
2485 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2486 return -EFAULT;
2487
2488 switch (per_queue_opt.sub_command) {
2489 case ETHTOOL_GCOALESCE:
2490 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2491 case ETHTOOL_SCOALESCE:
2492 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2493 default:
2494 return -EOPNOTSUPP;
2495 };
2496 }
2497
2498 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2499 {
2500 switch (tuna->id) {
2501 case ETHTOOL_PHY_DOWNSHIFT:
2502 if (tuna->len != sizeof(u8) ||
2503 tuna->type_id != ETHTOOL_TUNABLE_U8)
2504 return -EINVAL;
2505 break;
2506 default:
2507 return -EINVAL;
2508 }
2509
2510 return 0;
2511 }
2512
2513 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2514 {
2515 int ret;
2516 struct ethtool_tunable tuna;
2517 struct phy_device *phydev = dev->phydev;
2518 void *data;
2519
2520 if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2521 return -EOPNOTSUPP;
2522
2523 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2524 return -EFAULT;
2525 ret = ethtool_phy_tunable_valid(&tuna);
2526 if (ret)
2527 return ret;
2528 data = kmalloc(tuna.len, GFP_USER);
2529 if (!data)
2530 return -ENOMEM;
2531 mutex_lock(&phydev->lock);
2532 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2533 mutex_unlock(&phydev->lock);
2534 if (ret)
2535 goto out;
2536 useraddr += sizeof(tuna);
2537 ret = -EFAULT;
2538 if (copy_to_user(useraddr, data, tuna.len))
2539 goto out;
2540 ret = 0;
2541
2542 out:
2543 kfree(data);
2544 return ret;
2545 }
2546
2547 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2548 {
2549 int ret;
2550 struct ethtool_tunable tuna;
2551 struct phy_device *phydev = dev->phydev;
2552 void *data;
2553
2554 if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2555 return -EOPNOTSUPP;
2556 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2557 return -EFAULT;
2558 ret = ethtool_phy_tunable_valid(&tuna);
2559 if (ret)
2560 return ret;
2561 useraddr += sizeof(tuna);
2562 data = memdup_user(useraddr, tuna.len);
2563 if (IS_ERR(data))
2564 return PTR_ERR(data);
2565 mutex_lock(&phydev->lock);
2566 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2567 mutex_unlock(&phydev->lock);
2568
2569 kfree(data);
2570 return ret;
2571 }
2572
2573 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2574 {
2575 struct ethtool_fecparam fecparam = { ETHTOOL_GFECPARAM };
2576 int rc;
2577
2578 if (!dev->ethtool_ops->get_fecparam)
2579 return -EOPNOTSUPP;
2580
2581 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2582 if (rc)
2583 return rc;
2584
2585 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2586 return -EFAULT;
2587 return 0;
2588 }
2589
2590 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2591 {
2592 struct ethtool_fecparam fecparam;
2593
2594 if (!dev->ethtool_ops->set_fecparam)
2595 return -EOPNOTSUPP;
2596
2597 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2598 return -EFAULT;
2599
2600 return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2601 }
2602
2603 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
2604
2605 int dev_ethtool(struct net *net, struct ifreq *ifr)
2606 {
2607 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2608 void __user *useraddr = ifr->ifr_data;
2609 u32 ethcmd, sub_cmd;
2610 int rc;
2611 netdev_features_t old_features;
2612
2613 if (!dev || !netif_device_present(dev))
2614 return -ENODEV;
2615
2616 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2617 return -EFAULT;
2618
2619 if (ethcmd == ETHTOOL_PERQUEUE) {
2620 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2621 return -EFAULT;
2622 } else {
2623 sub_cmd = ethcmd;
2624 }
2625 /* Allow some commands to be done by anyone */
2626 switch (sub_cmd) {
2627 case ETHTOOL_GSET:
2628 case ETHTOOL_GDRVINFO:
2629 case ETHTOOL_GMSGLVL:
2630 case ETHTOOL_GLINK:
2631 case ETHTOOL_GCOALESCE:
2632 case ETHTOOL_GRINGPARAM:
2633 case ETHTOOL_GPAUSEPARAM:
2634 case ETHTOOL_GRXCSUM:
2635 case ETHTOOL_GTXCSUM:
2636 case ETHTOOL_GSG:
2637 case ETHTOOL_GSSET_INFO:
2638 case ETHTOOL_GSTRINGS:
2639 case ETHTOOL_GSTATS:
2640 case ETHTOOL_GPHYSTATS:
2641 case ETHTOOL_GTSO:
2642 case ETHTOOL_GPERMADDR:
2643 case ETHTOOL_GGSO:
2644 case ETHTOOL_GGRO:
2645 case ETHTOOL_GFLAGS:
2646 case ETHTOOL_GPFLAGS:
2647 case ETHTOOL_GRXFH:
2648 case ETHTOOL_GRXRINGS:
2649 case ETHTOOL_GRXCLSRLCNT:
2650 case ETHTOOL_GRXCLSRULE:
2651 case ETHTOOL_GRXCLSRLALL:
2652 case ETHTOOL_GRXFHINDIR:
2653 case ETHTOOL_GRSSH:
2654 case ETHTOOL_GFEATURES:
2655 case ETHTOOL_GCHANNELS:
2656 case ETHTOOL_GET_TS_INFO:
2657 case ETHTOOL_GEEE:
2658 case ETHTOOL_GTUNABLE:
2659 case ETHTOOL_PHY_GTUNABLE:
2660 case ETHTOOL_GLINKSETTINGS:
2661 case ETHTOOL_GFECPARAM:
2662 break;
2663 default:
2664 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2665 return -EPERM;
2666 }
2667
2668 if (dev->ethtool_ops->begin) {
2669 rc = dev->ethtool_ops->begin(dev);
2670 if (rc < 0)
2671 return rc;
2672 }
2673 old_features = dev->features;
2674
2675 switch (ethcmd) {
2676 case ETHTOOL_GSET:
2677 rc = ethtool_get_settings(dev, useraddr);
2678 break;
2679 case ETHTOOL_SSET:
2680 rc = ethtool_set_settings(dev, useraddr);
2681 break;
2682 case ETHTOOL_GDRVINFO:
2683 rc = ethtool_get_drvinfo(dev, useraddr);
2684 break;
2685 case ETHTOOL_GREGS:
2686 rc = ethtool_get_regs(dev, useraddr);
2687 break;
2688 case ETHTOOL_GWOL:
2689 rc = ethtool_get_wol(dev, useraddr);
2690 break;
2691 case ETHTOOL_SWOL:
2692 rc = ethtool_set_wol(dev, useraddr);
2693 break;
2694 case ETHTOOL_GMSGLVL:
2695 rc = ethtool_get_value(dev, useraddr, ethcmd,
2696 dev->ethtool_ops->get_msglevel);
2697 break;
2698 case ETHTOOL_SMSGLVL:
2699 rc = ethtool_set_value_void(dev, useraddr,
2700 dev->ethtool_ops->set_msglevel);
2701 break;
2702 case ETHTOOL_GEEE:
2703 rc = ethtool_get_eee(dev, useraddr);
2704 break;
2705 case ETHTOOL_SEEE:
2706 rc = ethtool_set_eee(dev, useraddr);
2707 break;
2708 case ETHTOOL_NWAY_RST:
2709 rc = ethtool_nway_reset(dev);
2710 break;
2711 case ETHTOOL_GLINK:
2712 rc = ethtool_get_link(dev, useraddr);
2713 break;
2714 case ETHTOOL_GEEPROM:
2715 rc = ethtool_get_eeprom(dev, useraddr);
2716 break;
2717 case ETHTOOL_SEEPROM:
2718 rc = ethtool_set_eeprom(dev, useraddr);
2719 break;
2720 case ETHTOOL_GCOALESCE:
2721 rc = ethtool_get_coalesce(dev, useraddr);
2722 break;
2723 case ETHTOOL_SCOALESCE:
2724 rc = ethtool_set_coalesce(dev, useraddr);
2725 break;
2726 case ETHTOOL_GRINGPARAM:
2727 rc = ethtool_get_ringparam(dev, useraddr);
2728 break;
2729 case ETHTOOL_SRINGPARAM:
2730 rc = ethtool_set_ringparam(dev, useraddr);
2731 break;
2732 case ETHTOOL_GPAUSEPARAM:
2733 rc = ethtool_get_pauseparam(dev, useraddr);
2734 break;
2735 case ETHTOOL_SPAUSEPARAM:
2736 rc = ethtool_set_pauseparam(dev, useraddr);
2737 break;
2738 case ETHTOOL_TEST:
2739 rc = ethtool_self_test(dev, useraddr);
2740 break;
2741 case ETHTOOL_GSTRINGS:
2742 rc = ethtool_get_strings(dev, useraddr);
2743 break;
2744 case ETHTOOL_PHYS_ID:
2745 rc = ethtool_phys_id(dev, useraddr);
2746 break;
2747 case ETHTOOL_GSTATS:
2748 rc = ethtool_get_stats(dev, useraddr);
2749 break;
2750 case ETHTOOL_GPERMADDR:
2751 rc = ethtool_get_perm_addr(dev, useraddr);
2752 break;
2753 case ETHTOOL_GFLAGS:
2754 rc = ethtool_get_value(dev, useraddr, ethcmd,
2755 __ethtool_get_flags);
2756 break;
2757 case ETHTOOL_SFLAGS:
2758 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2759 break;
2760 case ETHTOOL_GPFLAGS:
2761 rc = ethtool_get_value(dev, useraddr, ethcmd,
2762 dev->ethtool_ops->get_priv_flags);
2763 break;
2764 case ETHTOOL_SPFLAGS:
2765 rc = ethtool_set_value(dev, useraddr,
2766 dev->ethtool_ops->set_priv_flags);
2767 break;
2768 case ETHTOOL_GRXFH:
2769 case ETHTOOL_GRXRINGS:
2770 case ETHTOOL_GRXCLSRLCNT:
2771 case ETHTOOL_GRXCLSRULE:
2772 case ETHTOOL_GRXCLSRLALL:
2773 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2774 break;
2775 case ETHTOOL_SRXFH:
2776 case ETHTOOL_SRXCLSRLDEL:
2777 case ETHTOOL_SRXCLSRLINS:
2778 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2779 break;
2780 case ETHTOOL_FLASHDEV:
2781 rc = ethtool_flash_device(dev, useraddr);
2782 break;
2783 case ETHTOOL_RESET:
2784 rc = ethtool_reset(dev, useraddr);
2785 break;
2786 case ETHTOOL_GSSET_INFO:
2787 rc = ethtool_get_sset_info(dev, useraddr);
2788 break;
2789 case ETHTOOL_GRXFHINDIR:
2790 rc = ethtool_get_rxfh_indir(dev, useraddr);
2791 break;
2792 case ETHTOOL_SRXFHINDIR:
2793 rc = ethtool_set_rxfh_indir(dev, useraddr);
2794 break;
2795 case ETHTOOL_GRSSH:
2796 rc = ethtool_get_rxfh(dev, useraddr);
2797 break;
2798 case ETHTOOL_SRSSH:
2799 rc = ethtool_set_rxfh(dev, useraddr);
2800 break;
2801 case ETHTOOL_GFEATURES:
2802 rc = ethtool_get_features(dev, useraddr);
2803 break;
2804 case ETHTOOL_SFEATURES:
2805 rc = ethtool_set_features(dev, useraddr);
2806 break;
2807 case ETHTOOL_GTXCSUM:
2808 case ETHTOOL_GRXCSUM:
2809 case ETHTOOL_GSG:
2810 case ETHTOOL_GTSO:
2811 case ETHTOOL_GGSO:
2812 case ETHTOOL_GGRO:
2813 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2814 break;
2815 case ETHTOOL_STXCSUM:
2816 case ETHTOOL_SRXCSUM:
2817 case ETHTOOL_SSG:
2818 case ETHTOOL_STSO:
2819 case ETHTOOL_SGSO:
2820 case ETHTOOL_SGRO:
2821 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2822 break;
2823 case ETHTOOL_GCHANNELS:
2824 rc = ethtool_get_channels(dev, useraddr);
2825 break;
2826 case ETHTOOL_SCHANNELS:
2827 rc = ethtool_set_channels(dev, useraddr);
2828 break;
2829 case ETHTOOL_SET_DUMP:
2830 rc = ethtool_set_dump(dev, useraddr);
2831 break;
2832 case ETHTOOL_GET_DUMP_FLAG:
2833 rc = ethtool_get_dump_flag(dev, useraddr);
2834 break;
2835 case ETHTOOL_GET_DUMP_DATA:
2836 rc = ethtool_get_dump_data(dev, useraddr);
2837 break;
2838 case ETHTOOL_GET_TS_INFO:
2839 rc = ethtool_get_ts_info(dev, useraddr);
2840 break;
2841 case ETHTOOL_GMODULEINFO:
2842 rc = ethtool_get_module_info(dev, useraddr);
2843 break;
2844 case ETHTOOL_GMODULEEEPROM:
2845 rc = ethtool_get_module_eeprom(dev, useraddr);
2846 break;
2847 case ETHTOOL_GTUNABLE:
2848 rc = ethtool_get_tunable(dev, useraddr);
2849 break;
2850 case ETHTOOL_STUNABLE:
2851 rc = ethtool_set_tunable(dev, useraddr);
2852 break;
2853 case ETHTOOL_GPHYSTATS:
2854 rc = ethtool_get_phy_stats(dev, useraddr);
2855 break;
2856 case ETHTOOL_PERQUEUE:
2857 rc = ethtool_set_per_queue(dev, useraddr);
2858 break;
2859 case ETHTOOL_GLINKSETTINGS:
2860 rc = ethtool_get_link_ksettings(dev, useraddr);
2861 break;
2862 case ETHTOOL_SLINKSETTINGS:
2863 rc = ethtool_set_link_ksettings(dev, useraddr);
2864 break;
2865 case ETHTOOL_PHY_GTUNABLE:
2866 rc = get_phy_tunable(dev, useraddr);
2867 break;
2868 case ETHTOOL_PHY_STUNABLE:
2869 rc = set_phy_tunable(dev, useraddr);
2870 break;
2871 case ETHTOOL_GFECPARAM:
2872 rc = ethtool_get_fecparam(dev, useraddr);
2873 break;
2874 case ETHTOOL_SFECPARAM:
2875 rc = ethtool_set_fecparam(dev, useraddr);
2876 break;
2877 default:
2878 rc = -EOPNOTSUPP;
2879 }
2880
2881 if (dev->ethtool_ops->complete)
2882 dev->ethtool_ops->complete(dev);
2883
2884 if (old_features != dev->features)
2885 netdev_features_change(dev);
2886
2887 return rc;
2888 }
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