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[mirror_ubuntu-bionic-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/slab.h>
26 #include <linux/rtnetlink.h>
27 #include <linux/sched/signal.h>
28 #include <linux/net.h>
29
30 /*
31 * Some useful ethtool_ops methods that're device independent.
32 * If we find that all drivers want to do the same thing here,
33 * we can turn these into dev_() function calls.
34 */
35
36 u32 ethtool_op_get_link(struct net_device *dev)
37 {
38 return netif_carrier_ok(dev) ? 1 : 0;
39 }
40 EXPORT_SYMBOL(ethtool_op_get_link);
41
42 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
43 {
44 info->so_timestamping =
45 SOF_TIMESTAMPING_TX_SOFTWARE |
46 SOF_TIMESTAMPING_RX_SOFTWARE |
47 SOF_TIMESTAMPING_SOFTWARE;
48 info->phc_index = -1;
49 return 0;
50 }
51 EXPORT_SYMBOL(ethtool_op_get_ts_info);
52
53 /* Handlers for each ethtool command */
54
55 #define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
56
57 static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
58 [NETIF_F_SG_BIT] = "tx-scatter-gather",
59 [NETIF_F_IP_CSUM_BIT] = "tx-checksum-ipv4",
60 [NETIF_F_HW_CSUM_BIT] = "tx-checksum-ip-generic",
61 [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6",
62 [NETIF_F_HIGHDMA_BIT] = "highdma",
63 [NETIF_F_FRAGLIST_BIT] = "tx-scatter-gather-fraglist",
64 [NETIF_F_HW_VLAN_CTAG_TX_BIT] = "tx-vlan-hw-insert",
65
66 [NETIF_F_HW_VLAN_CTAG_RX_BIT] = "rx-vlan-hw-parse",
67 [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
68 [NETIF_F_HW_VLAN_STAG_TX_BIT] = "tx-vlan-stag-hw-insert",
69 [NETIF_F_HW_VLAN_STAG_RX_BIT] = "rx-vlan-stag-hw-parse",
70 [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
71 [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged",
72 [NETIF_F_GSO_BIT] = "tx-generic-segmentation",
73 [NETIF_F_LLTX_BIT] = "tx-lockless",
74 [NETIF_F_NETNS_LOCAL_BIT] = "netns-local",
75 [NETIF_F_GRO_BIT] = "rx-gro",
76 [NETIF_F_LRO_BIT] = "rx-lro",
77
78 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation",
79 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
80 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
81 [NETIF_F_TSO_MANGLEID_BIT] = "tx-tcp-mangleid-segmentation",
82 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
83 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
84 [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
85 [NETIF_F_GSO_GRE_CSUM_BIT] = "tx-gre-csum-segmentation",
86 [NETIF_F_GSO_IPXIP4_BIT] = "tx-ipxip4-segmentation",
87 [NETIF_F_GSO_IPXIP6_BIT] = "tx-ipxip6-segmentation",
88 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
89 [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
90 [NETIF_F_GSO_PARTIAL_BIT] = "tx-gso-partial",
91 [NETIF_F_GSO_SCTP_BIT] = "tx-sctp-segmentation",
92 [NETIF_F_GSO_ESP_BIT] = "tx-esp-segmentation",
93
94 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
95 [NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
96 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
97 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
98 [NETIF_F_RXHASH_BIT] = "rx-hashing",
99 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
100 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
101 [NETIF_F_LOOPBACK_BIT] = "loopback",
102 [NETIF_F_RXFCS_BIT] = "rx-fcs",
103 [NETIF_F_RXALL_BIT] = "rx-all",
104 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
105 [NETIF_F_HW_TC_BIT] = "hw-tc-offload",
106 [NETIF_F_HW_ESP_BIT] = "esp-hw-offload",
107 [NETIF_F_HW_ESP_TX_CSUM_BIT] = "esp-tx-csum-hw-offload",
108 [NETIF_F_RX_UDP_TUNNEL_PORT_BIT] = "rx-udp_tunnel-port-offload",
109 };
110
111 static const char
112 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
113 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
114 [ETH_RSS_HASH_XOR_BIT] = "xor",
115 [ETH_RSS_HASH_CRC32_BIT] = "crc32",
116 };
117
118 static const char
119 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
120 [ETHTOOL_ID_UNSPEC] = "Unspec",
121 [ETHTOOL_RX_COPYBREAK] = "rx-copybreak",
122 [ETHTOOL_TX_COPYBREAK] = "tx-copybreak",
123 };
124
125 static const char
126 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
127 [ETHTOOL_ID_UNSPEC] = "Unspec",
128 [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
129 };
130
131 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
132 {
133 struct ethtool_gfeatures cmd = {
134 .cmd = ETHTOOL_GFEATURES,
135 .size = ETHTOOL_DEV_FEATURE_WORDS,
136 };
137 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
138 u32 __user *sizeaddr;
139 u32 copy_size;
140 int i;
141
142 /* in case feature bits run out again */
143 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
144
145 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
146 features[i].available = (u32)(dev->hw_features >> (32 * i));
147 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
148 features[i].active = (u32)(dev->features >> (32 * i));
149 features[i].never_changed =
150 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
151 }
152
153 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
154 if (get_user(copy_size, sizeaddr))
155 return -EFAULT;
156
157 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
158 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
159
160 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
161 return -EFAULT;
162 useraddr += sizeof(cmd);
163 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
164 return -EFAULT;
165
166 return 0;
167 }
168
169 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
170 {
171 struct ethtool_sfeatures cmd;
172 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
173 netdev_features_t wanted = 0, valid = 0;
174 int i, ret = 0;
175
176 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
177 return -EFAULT;
178 useraddr += sizeof(cmd);
179
180 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
181 return -EINVAL;
182
183 if (copy_from_user(features, useraddr, sizeof(features)))
184 return -EFAULT;
185
186 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
187 valid |= (netdev_features_t)features[i].valid << (32 * i);
188 wanted |= (netdev_features_t)features[i].requested << (32 * i);
189 }
190
191 if (valid & ~NETIF_F_ETHTOOL_BITS)
192 return -EINVAL;
193
194 if (valid & ~dev->hw_features) {
195 valid &= dev->hw_features;
196 ret |= ETHTOOL_F_UNSUPPORTED;
197 }
198
199 dev->wanted_features &= ~valid;
200 dev->wanted_features |= wanted & valid;
201 __netdev_update_features(dev);
202
203 if ((dev->wanted_features ^ dev->features) & valid)
204 ret |= ETHTOOL_F_WISH;
205
206 return ret;
207 }
208
209 static int phy_get_sset_count(struct phy_device *phydev)
210 {
211 int ret;
212
213 if (phydev->drv->get_sset_count &&
214 phydev->drv->get_strings &&
215 phydev->drv->get_stats) {
216 mutex_lock(&phydev->lock);
217 ret = phydev->drv->get_sset_count(phydev);
218 mutex_unlock(&phydev->lock);
219
220 return ret;
221 }
222
223 return -EOPNOTSUPP;
224 }
225
226 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
227 {
228 const struct ethtool_ops *ops = dev->ethtool_ops;
229
230 if (sset == ETH_SS_FEATURES)
231 return ARRAY_SIZE(netdev_features_strings);
232
233 if (sset == ETH_SS_RSS_HASH_FUNCS)
234 return ARRAY_SIZE(rss_hash_func_strings);
235
236 if (sset == ETH_SS_TUNABLES)
237 return ARRAY_SIZE(tunable_strings);
238
239 if (sset == ETH_SS_PHY_TUNABLES)
240 return ARRAY_SIZE(phy_tunable_strings);
241
242 if (sset == ETH_SS_PHY_STATS) {
243 if (dev->phydev)
244 return phy_get_sset_count(dev->phydev);
245 else
246 return -EOPNOTSUPP;
247 }
248
249 if (ops->get_sset_count && ops->get_strings)
250 return ops->get_sset_count(dev, sset);
251 else
252 return -EOPNOTSUPP;
253 }
254
255 static void __ethtool_get_strings(struct net_device *dev,
256 u32 stringset, u8 *data)
257 {
258 const struct ethtool_ops *ops = dev->ethtool_ops;
259
260 if (stringset == ETH_SS_FEATURES)
261 memcpy(data, netdev_features_strings,
262 sizeof(netdev_features_strings));
263 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
264 memcpy(data, rss_hash_func_strings,
265 sizeof(rss_hash_func_strings));
266 else if (stringset == ETH_SS_TUNABLES)
267 memcpy(data, tunable_strings, sizeof(tunable_strings));
268 else if (stringset == ETH_SS_PHY_TUNABLES)
269 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
270 else if (stringset == ETH_SS_PHY_STATS) {
271 struct phy_device *phydev = dev->phydev;
272
273 if (phydev) {
274 mutex_lock(&phydev->lock);
275 phydev->drv->get_strings(phydev, data);
276 mutex_unlock(&phydev->lock);
277 } else {
278 return;
279 }
280 } else
281 /* ops->get_strings is valid because checked earlier */
282 ops->get_strings(dev, stringset, data);
283 }
284
285 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
286 {
287 /* feature masks of legacy discrete ethtool ops */
288
289 switch (eth_cmd) {
290 case ETHTOOL_GTXCSUM:
291 case ETHTOOL_STXCSUM:
292 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
293 case ETHTOOL_GRXCSUM:
294 case ETHTOOL_SRXCSUM:
295 return NETIF_F_RXCSUM;
296 case ETHTOOL_GSG:
297 case ETHTOOL_SSG:
298 return NETIF_F_SG;
299 case ETHTOOL_GTSO:
300 case ETHTOOL_STSO:
301 return NETIF_F_ALL_TSO;
302 case ETHTOOL_GGSO:
303 case ETHTOOL_SGSO:
304 return NETIF_F_GSO;
305 case ETHTOOL_GGRO:
306 case ETHTOOL_SGRO:
307 return NETIF_F_GRO;
308 default:
309 BUG();
310 }
311 }
312
313 static int ethtool_get_one_feature(struct net_device *dev,
314 char __user *useraddr, u32 ethcmd)
315 {
316 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
317 struct ethtool_value edata = {
318 .cmd = ethcmd,
319 .data = !!(dev->features & mask),
320 };
321
322 if (copy_to_user(useraddr, &edata, sizeof(edata)))
323 return -EFAULT;
324 return 0;
325 }
326
327 static int ethtool_set_one_feature(struct net_device *dev,
328 void __user *useraddr, u32 ethcmd)
329 {
330 struct ethtool_value edata;
331 netdev_features_t mask;
332
333 if (copy_from_user(&edata, useraddr, sizeof(edata)))
334 return -EFAULT;
335
336 mask = ethtool_get_feature_mask(ethcmd);
337 mask &= dev->hw_features;
338 if (!mask)
339 return -EOPNOTSUPP;
340
341 if (edata.data)
342 dev->wanted_features |= mask;
343 else
344 dev->wanted_features &= ~mask;
345
346 __netdev_update_features(dev);
347
348 return 0;
349 }
350
351 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
352 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
353 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
354 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
355 NETIF_F_RXHASH)
356
357 static u32 __ethtool_get_flags(struct net_device *dev)
358 {
359 u32 flags = 0;
360
361 if (dev->features & NETIF_F_LRO)
362 flags |= ETH_FLAG_LRO;
363 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
364 flags |= ETH_FLAG_RXVLAN;
365 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
366 flags |= ETH_FLAG_TXVLAN;
367 if (dev->features & NETIF_F_NTUPLE)
368 flags |= ETH_FLAG_NTUPLE;
369 if (dev->features & NETIF_F_RXHASH)
370 flags |= ETH_FLAG_RXHASH;
371
372 return flags;
373 }
374
375 static int __ethtool_set_flags(struct net_device *dev, u32 data)
376 {
377 netdev_features_t features = 0, changed;
378
379 if (data & ~ETH_ALL_FLAGS)
380 return -EINVAL;
381
382 if (data & ETH_FLAG_LRO)
383 features |= NETIF_F_LRO;
384 if (data & ETH_FLAG_RXVLAN)
385 features |= NETIF_F_HW_VLAN_CTAG_RX;
386 if (data & ETH_FLAG_TXVLAN)
387 features |= NETIF_F_HW_VLAN_CTAG_TX;
388 if (data & ETH_FLAG_NTUPLE)
389 features |= NETIF_F_NTUPLE;
390 if (data & ETH_FLAG_RXHASH)
391 features |= NETIF_F_RXHASH;
392
393 /* allow changing only bits set in hw_features */
394 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
395 if (changed & ~dev->hw_features)
396 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
397
398 dev->wanted_features =
399 (dev->wanted_features & ~changed) | (features & changed);
400
401 __netdev_update_features(dev);
402
403 return 0;
404 }
405
406 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
407 u32 legacy_u32)
408 {
409 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
410 dst[0] = legacy_u32;
411 }
412 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
413
414 /* return false if src had higher bits set. lower bits always updated. */
415 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
416 const unsigned long *src)
417 {
418 bool retval = true;
419
420 /* TODO: following test will soon always be true */
421 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
422 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
423
424 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
425 bitmap_fill(ext, 32);
426 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
427 if (bitmap_intersects(ext, src,
428 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
429 /* src mask goes beyond bit 31 */
430 retval = false;
431 }
432 }
433 *legacy_u32 = src[0];
434 return retval;
435 }
436 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
437
438 /* return false if legacy contained non-0 deprecated fields
439 * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
440 */
441 static bool
442 convert_legacy_settings_to_link_ksettings(
443 struct ethtool_link_ksettings *link_ksettings,
444 const struct ethtool_cmd *legacy_settings)
445 {
446 bool retval = true;
447
448 memset(link_ksettings, 0, sizeof(*link_ksettings));
449
450 /* This is used to tell users that driver is still using these
451 * deprecated legacy fields, and they should not use
452 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
453 */
454 if (legacy_settings->transceiver ||
455 legacy_settings->maxtxpkt ||
456 legacy_settings->maxrxpkt)
457 retval = false;
458
459 ethtool_convert_legacy_u32_to_link_mode(
460 link_ksettings->link_modes.supported,
461 legacy_settings->supported);
462 ethtool_convert_legacy_u32_to_link_mode(
463 link_ksettings->link_modes.advertising,
464 legacy_settings->advertising);
465 ethtool_convert_legacy_u32_to_link_mode(
466 link_ksettings->link_modes.lp_advertising,
467 legacy_settings->lp_advertising);
468 link_ksettings->base.speed
469 = ethtool_cmd_speed(legacy_settings);
470 link_ksettings->base.duplex
471 = legacy_settings->duplex;
472 link_ksettings->base.port
473 = legacy_settings->port;
474 link_ksettings->base.phy_address
475 = legacy_settings->phy_address;
476 link_ksettings->base.autoneg
477 = legacy_settings->autoneg;
478 link_ksettings->base.mdio_support
479 = legacy_settings->mdio_support;
480 link_ksettings->base.eth_tp_mdix
481 = legacy_settings->eth_tp_mdix;
482 link_ksettings->base.eth_tp_mdix_ctrl
483 = legacy_settings->eth_tp_mdix_ctrl;
484 return retval;
485 }
486
487 /* return false if ksettings link modes had higher bits
488 * set. legacy_settings always updated (best effort)
489 */
490 static bool
491 convert_link_ksettings_to_legacy_settings(
492 struct ethtool_cmd *legacy_settings,
493 const struct ethtool_link_ksettings *link_ksettings)
494 {
495 bool retval = true;
496
497 memset(legacy_settings, 0, sizeof(*legacy_settings));
498 /* this also clears the deprecated fields in legacy structure:
499 * __u8 transceiver;
500 * __u32 maxtxpkt;
501 * __u32 maxrxpkt;
502 */
503
504 retval &= ethtool_convert_link_mode_to_legacy_u32(
505 &legacy_settings->supported,
506 link_ksettings->link_modes.supported);
507 retval &= ethtool_convert_link_mode_to_legacy_u32(
508 &legacy_settings->advertising,
509 link_ksettings->link_modes.advertising);
510 retval &= ethtool_convert_link_mode_to_legacy_u32(
511 &legacy_settings->lp_advertising,
512 link_ksettings->link_modes.lp_advertising);
513 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
514 legacy_settings->duplex
515 = link_ksettings->base.duplex;
516 legacy_settings->port
517 = link_ksettings->base.port;
518 legacy_settings->phy_address
519 = link_ksettings->base.phy_address;
520 legacy_settings->autoneg
521 = link_ksettings->base.autoneg;
522 legacy_settings->mdio_support
523 = link_ksettings->base.mdio_support;
524 legacy_settings->eth_tp_mdix
525 = link_ksettings->base.eth_tp_mdix;
526 legacy_settings->eth_tp_mdix_ctrl
527 = link_ksettings->base.eth_tp_mdix_ctrl;
528 legacy_settings->transceiver
529 = link_ksettings->base.transceiver;
530 return retval;
531 }
532
533 /* number of 32-bit words to store the user's link mode bitmaps */
534 #define __ETHTOOL_LINK_MODE_MASK_NU32 \
535 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
536
537 /* layout of the struct passed from/to userland */
538 struct ethtool_link_usettings {
539 struct ethtool_link_settings base;
540 struct {
541 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
542 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
543 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
544 } link_modes;
545 };
546
547 /* Internal kernel helper to query a device ethtool_link_settings.
548 *
549 * Backward compatibility note: for compatibility with legacy drivers
550 * that implement only the ethtool_cmd API, this has to work with both
551 * drivers implementing get_link_ksettings API and drivers
552 * implementing get_settings API. When drivers implement get_settings
553 * and report ethtool_cmd deprecated fields
554 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
555 * because the resulting struct ethtool_link_settings does not report them.
556 */
557 int __ethtool_get_link_ksettings(struct net_device *dev,
558 struct ethtool_link_ksettings *link_ksettings)
559 {
560 int err;
561 struct ethtool_cmd cmd;
562
563 ASSERT_RTNL();
564
565 if (dev->ethtool_ops->get_link_ksettings) {
566 memset(link_ksettings, 0, sizeof(*link_ksettings));
567 return dev->ethtool_ops->get_link_ksettings(dev,
568 link_ksettings);
569 }
570
571 /* driver doesn't support %ethtool_link_ksettings API. revert to
572 * legacy %ethtool_cmd API, unless it's not supported either.
573 * TODO: remove when ethtool_ops::get_settings disappears internally
574 */
575 if (!dev->ethtool_ops->get_settings)
576 return -EOPNOTSUPP;
577
578 memset(&cmd, 0, sizeof(cmd));
579 cmd.cmd = ETHTOOL_GSET;
580 err = dev->ethtool_ops->get_settings(dev, &cmd);
581 if (err < 0)
582 return err;
583
584 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
585 */
586 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
587 return err;
588 }
589 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
590
591 /* convert ethtool_link_usettings in user space to a kernel internal
592 * ethtool_link_ksettings. return 0 on success, errno on error.
593 */
594 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
595 const void __user *from)
596 {
597 struct ethtool_link_usettings link_usettings;
598
599 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
600 return -EFAULT;
601
602 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
603 bitmap_from_u32array(to->link_modes.supported,
604 __ETHTOOL_LINK_MODE_MASK_NBITS,
605 link_usettings.link_modes.supported,
606 __ETHTOOL_LINK_MODE_MASK_NU32);
607 bitmap_from_u32array(to->link_modes.advertising,
608 __ETHTOOL_LINK_MODE_MASK_NBITS,
609 link_usettings.link_modes.advertising,
610 __ETHTOOL_LINK_MODE_MASK_NU32);
611 bitmap_from_u32array(to->link_modes.lp_advertising,
612 __ETHTOOL_LINK_MODE_MASK_NBITS,
613 link_usettings.link_modes.lp_advertising,
614 __ETHTOOL_LINK_MODE_MASK_NU32);
615
616 return 0;
617 }
618
619 /* convert a kernel internal ethtool_link_ksettings to
620 * ethtool_link_usettings in user space. return 0 on success, errno on
621 * error.
622 */
623 static int
624 store_link_ksettings_for_user(void __user *to,
625 const struct ethtool_link_ksettings *from)
626 {
627 struct ethtool_link_usettings link_usettings;
628
629 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
630 bitmap_to_u32array(link_usettings.link_modes.supported,
631 __ETHTOOL_LINK_MODE_MASK_NU32,
632 from->link_modes.supported,
633 __ETHTOOL_LINK_MODE_MASK_NBITS);
634 bitmap_to_u32array(link_usettings.link_modes.advertising,
635 __ETHTOOL_LINK_MODE_MASK_NU32,
636 from->link_modes.advertising,
637 __ETHTOOL_LINK_MODE_MASK_NBITS);
638 bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
639 __ETHTOOL_LINK_MODE_MASK_NU32,
640 from->link_modes.lp_advertising,
641 __ETHTOOL_LINK_MODE_MASK_NBITS);
642
643 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
644 return -EFAULT;
645
646 return 0;
647 }
648
649 /* Query device for its ethtool_link_settings.
650 *
651 * Backward compatibility note: this function must fail when driver
652 * does not implement ethtool::get_link_ksettings, even if legacy
653 * ethtool_ops::get_settings is implemented. This tells new versions
654 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
655 * this driver, so that they can correctly access the ethtool_cmd
656 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
657 * implements ethtool_ops::get_settings anymore.
658 */
659 static int ethtool_get_link_ksettings(struct net_device *dev,
660 void __user *useraddr)
661 {
662 int err = 0;
663 struct ethtool_link_ksettings link_ksettings;
664
665 ASSERT_RTNL();
666
667 if (!dev->ethtool_ops->get_link_ksettings)
668 return -EOPNOTSUPP;
669
670 /* handle bitmap nbits handshake */
671 if (copy_from_user(&link_ksettings.base, useraddr,
672 sizeof(link_ksettings.base)))
673 return -EFAULT;
674
675 if (__ETHTOOL_LINK_MODE_MASK_NU32
676 != link_ksettings.base.link_mode_masks_nwords) {
677 /* wrong link mode nbits requested */
678 memset(&link_ksettings, 0, sizeof(link_ksettings));
679 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
680 /* send back number of words required as negative val */
681 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
682 "need too many bits for link modes!");
683 link_ksettings.base.link_mode_masks_nwords
684 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
685
686 /* copy the base fields back to user, not the link
687 * mode bitmaps
688 */
689 if (copy_to_user(useraddr, &link_ksettings.base,
690 sizeof(link_ksettings.base)))
691 return -EFAULT;
692
693 return 0;
694 }
695
696 /* handshake successful: user/kernel agree on
697 * link_mode_masks_nwords
698 */
699
700 memset(&link_ksettings, 0, sizeof(link_ksettings));
701 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
702 if (err < 0)
703 return err;
704
705 /* make sure we tell the right values to user */
706 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
707 link_ksettings.base.link_mode_masks_nwords
708 = __ETHTOOL_LINK_MODE_MASK_NU32;
709
710 return store_link_ksettings_for_user(useraddr, &link_ksettings);
711 }
712
713 /* Update device ethtool_link_settings.
714 *
715 * Backward compatibility note: this function must fail when driver
716 * does not implement ethtool::set_link_ksettings, even if legacy
717 * ethtool_ops::set_settings is implemented. This tells new versions
718 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
719 * this driver, so that they can correctly update the ethtool_cmd
720 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
721 * implements ethtool_ops::get_settings anymore.
722 */
723 static int ethtool_set_link_ksettings(struct net_device *dev,
724 void __user *useraddr)
725 {
726 int err;
727 struct ethtool_link_ksettings link_ksettings;
728
729 ASSERT_RTNL();
730
731 if (!dev->ethtool_ops->set_link_ksettings)
732 return -EOPNOTSUPP;
733
734 /* make sure nbits field has expected value */
735 if (copy_from_user(&link_ksettings.base, useraddr,
736 sizeof(link_ksettings.base)))
737 return -EFAULT;
738
739 if (__ETHTOOL_LINK_MODE_MASK_NU32
740 != link_ksettings.base.link_mode_masks_nwords)
741 return -EINVAL;
742
743 /* copy the whole structure, now that we know it has expected
744 * format
745 */
746 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
747 if (err)
748 return err;
749
750 /* re-check nwords field, just in case */
751 if (__ETHTOOL_LINK_MODE_MASK_NU32
752 != link_ksettings.base.link_mode_masks_nwords)
753 return -EINVAL;
754
755 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
756 }
757
758 static void
759 warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
760 {
761 char name[sizeof(current->comm)];
762
763 pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
764 get_task_comm(name, current), details);
765 }
766
767 /* Query device for its ethtool_cmd settings.
768 *
769 * Backward compatibility note: for compatibility with legacy ethtool,
770 * this has to work with both drivers implementing get_link_ksettings
771 * API and drivers implementing get_settings API. When drivers
772 * implement get_link_ksettings and report higher link mode bits, a
773 * kernel warning is logged once (with name of 1st driver/device) to
774 * recommend user to upgrade ethtool, but the command is successful
775 * (only the lower link mode bits reported back to user).
776 */
777 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
778 {
779 struct ethtool_cmd cmd;
780
781 ASSERT_RTNL();
782
783 if (dev->ethtool_ops->get_link_ksettings) {
784 /* First, use link_ksettings API if it is supported */
785 int err;
786 struct ethtool_link_ksettings link_ksettings;
787
788 memset(&link_ksettings, 0, sizeof(link_ksettings));
789 err = dev->ethtool_ops->get_link_ksettings(dev,
790 &link_ksettings);
791 if (err < 0)
792 return err;
793 if (!convert_link_ksettings_to_legacy_settings(&cmd,
794 &link_ksettings))
795 warn_incomplete_ethtool_legacy_settings_conversion(
796 "link modes are only partially reported");
797
798 /* send a sensible cmd tag back to user */
799 cmd.cmd = ETHTOOL_GSET;
800 } else {
801 /* driver doesn't support %ethtool_link_ksettings
802 * API. revert to legacy %ethtool_cmd API, unless it's
803 * not supported either.
804 */
805 int err;
806
807 if (!dev->ethtool_ops->get_settings)
808 return -EOPNOTSUPP;
809
810 memset(&cmd, 0, sizeof(cmd));
811 cmd.cmd = ETHTOOL_GSET;
812 err = dev->ethtool_ops->get_settings(dev, &cmd);
813 if (err < 0)
814 return err;
815 }
816
817 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
818 return -EFAULT;
819
820 return 0;
821 }
822
823 /* Update device link settings with given ethtool_cmd.
824 *
825 * Backward compatibility note: for compatibility with legacy ethtool,
826 * this has to work with both drivers implementing set_link_ksettings
827 * API and drivers implementing set_settings API. When drivers
828 * implement set_link_ksettings and user's request updates deprecated
829 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
830 * warning is logged once (with name of 1st driver/device) to
831 * recommend user to upgrade ethtool, and the request is rejected.
832 */
833 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
834 {
835 struct ethtool_cmd cmd;
836
837 ASSERT_RTNL();
838
839 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
840 return -EFAULT;
841
842 /* first, try new %ethtool_link_ksettings API. */
843 if (dev->ethtool_ops->set_link_ksettings) {
844 struct ethtool_link_ksettings link_ksettings;
845
846 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
847 &cmd))
848 return -EINVAL;
849
850 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
851 link_ksettings.base.link_mode_masks_nwords
852 = __ETHTOOL_LINK_MODE_MASK_NU32;
853 return dev->ethtool_ops->set_link_ksettings(dev,
854 &link_ksettings);
855 }
856
857 /* legacy %ethtool_cmd API */
858
859 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
860 * disappears internally
861 */
862
863 if (!dev->ethtool_ops->set_settings)
864 return -EOPNOTSUPP;
865
866 return dev->ethtool_ops->set_settings(dev, &cmd);
867 }
868
869 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
870 void __user *useraddr)
871 {
872 struct ethtool_drvinfo info;
873 const struct ethtool_ops *ops = dev->ethtool_ops;
874
875 memset(&info, 0, sizeof(info));
876 info.cmd = ETHTOOL_GDRVINFO;
877 if (ops->get_drvinfo) {
878 ops->get_drvinfo(dev, &info);
879 } else if (dev->dev.parent && dev->dev.parent->driver) {
880 strlcpy(info.bus_info, dev_name(dev->dev.parent),
881 sizeof(info.bus_info));
882 strlcpy(info.driver, dev->dev.parent->driver->name,
883 sizeof(info.driver));
884 } else {
885 return -EOPNOTSUPP;
886 }
887
888 /*
889 * this method of obtaining string set info is deprecated;
890 * Use ETHTOOL_GSSET_INFO instead.
891 */
892 if (ops->get_sset_count) {
893 int rc;
894
895 rc = ops->get_sset_count(dev, ETH_SS_TEST);
896 if (rc >= 0)
897 info.testinfo_len = rc;
898 rc = ops->get_sset_count(dev, ETH_SS_STATS);
899 if (rc >= 0)
900 info.n_stats = rc;
901 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
902 if (rc >= 0)
903 info.n_priv_flags = rc;
904 }
905 if (ops->get_regs_len)
906 info.regdump_len = ops->get_regs_len(dev);
907 if (ops->get_eeprom_len)
908 info.eedump_len = ops->get_eeprom_len(dev);
909
910 if (copy_to_user(useraddr, &info, sizeof(info)))
911 return -EFAULT;
912 return 0;
913 }
914
915 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
916 void __user *useraddr)
917 {
918 struct ethtool_sset_info info;
919 u64 sset_mask;
920 int i, idx = 0, n_bits = 0, ret, rc;
921 u32 *info_buf = NULL;
922
923 if (copy_from_user(&info, useraddr, sizeof(info)))
924 return -EFAULT;
925
926 /* store copy of mask, because we zero struct later on */
927 sset_mask = info.sset_mask;
928 if (!sset_mask)
929 return 0;
930
931 /* calculate size of return buffer */
932 n_bits = hweight64(sset_mask);
933
934 memset(&info, 0, sizeof(info));
935 info.cmd = ETHTOOL_GSSET_INFO;
936
937 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
938 if (!info_buf)
939 return -ENOMEM;
940
941 /*
942 * fill return buffer based on input bitmask and successful
943 * get_sset_count return
944 */
945 for (i = 0; i < 64; i++) {
946 if (!(sset_mask & (1ULL << i)))
947 continue;
948
949 rc = __ethtool_get_sset_count(dev, i);
950 if (rc >= 0) {
951 info.sset_mask |= (1ULL << i);
952 info_buf[idx++] = rc;
953 }
954 }
955
956 ret = -EFAULT;
957 if (copy_to_user(useraddr, &info, sizeof(info)))
958 goto out;
959
960 useraddr += offsetof(struct ethtool_sset_info, data);
961 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
962 goto out;
963
964 ret = 0;
965
966 out:
967 kfree(info_buf);
968 return ret;
969 }
970
971 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
972 u32 cmd, void __user *useraddr)
973 {
974 struct ethtool_rxnfc info;
975 size_t info_size = sizeof(info);
976 int rc;
977
978 if (!dev->ethtool_ops->set_rxnfc)
979 return -EOPNOTSUPP;
980
981 /* struct ethtool_rxnfc was originally defined for
982 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
983 * members. User-space might still be using that
984 * definition. */
985 if (cmd == ETHTOOL_SRXFH)
986 info_size = (offsetof(struct ethtool_rxnfc, data) +
987 sizeof(info.data));
988
989 if (copy_from_user(&info, useraddr, info_size))
990 return -EFAULT;
991
992 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
993 if (rc)
994 return rc;
995
996 if (cmd == ETHTOOL_SRXCLSRLINS &&
997 copy_to_user(useraddr, &info, info_size))
998 return -EFAULT;
999
1000 return 0;
1001 }
1002
1003 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1004 u32 cmd, void __user *useraddr)
1005 {
1006 struct ethtool_rxnfc info;
1007 size_t info_size = sizeof(info);
1008 const struct ethtool_ops *ops = dev->ethtool_ops;
1009 int ret;
1010 void *rule_buf = NULL;
1011
1012 if (!ops->get_rxnfc)
1013 return -EOPNOTSUPP;
1014
1015 /* struct ethtool_rxnfc was originally defined for
1016 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1017 * members. User-space might still be using that
1018 * definition. */
1019 if (cmd == ETHTOOL_GRXFH)
1020 info_size = (offsetof(struct ethtool_rxnfc, data) +
1021 sizeof(info.data));
1022
1023 if (copy_from_user(&info, useraddr, info_size))
1024 return -EFAULT;
1025
1026 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1027 if (info.rule_cnt > 0) {
1028 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1029 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
1030 GFP_USER);
1031 if (!rule_buf)
1032 return -ENOMEM;
1033 }
1034 }
1035
1036 ret = ops->get_rxnfc(dev, &info, rule_buf);
1037 if (ret < 0)
1038 goto err_out;
1039
1040 ret = -EFAULT;
1041 if (copy_to_user(useraddr, &info, info_size))
1042 goto err_out;
1043
1044 if (rule_buf) {
1045 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1046 if (copy_to_user(useraddr, rule_buf,
1047 info.rule_cnt * sizeof(u32)))
1048 goto err_out;
1049 }
1050 ret = 0;
1051
1052 err_out:
1053 kfree(rule_buf);
1054
1055 return ret;
1056 }
1057
1058 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1059 struct ethtool_rxnfc *rx_rings,
1060 u32 size)
1061 {
1062 int i;
1063
1064 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1065 return -EFAULT;
1066
1067 /* Validate ring indices */
1068 for (i = 0; i < size; i++)
1069 if (indir[i] >= rx_rings->data)
1070 return -EINVAL;
1071
1072 return 0;
1073 }
1074
1075 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1076
1077 void netdev_rss_key_fill(void *buffer, size_t len)
1078 {
1079 BUG_ON(len > sizeof(netdev_rss_key));
1080 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1081 memcpy(buffer, netdev_rss_key, len);
1082 }
1083 EXPORT_SYMBOL(netdev_rss_key_fill);
1084
1085 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1086 {
1087 u32 dev_size, current_max = 0;
1088 u32 *indir;
1089 int ret;
1090
1091 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1092 !dev->ethtool_ops->get_rxfh)
1093 return -EOPNOTSUPP;
1094 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1095 if (dev_size == 0)
1096 return -EOPNOTSUPP;
1097
1098 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1099 if (!indir)
1100 return -ENOMEM;
1101
1102 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1103 if (ret)
1104 goto out;
1105
1106 while (dev_size--)
1107 current_max = max(current_max, indir[dev_size]);
1108
1109 *max = current_max;
1110
1111 out:
1112 kfree(indir);
1113 return ret;
1114 }
1115
1116 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1117 void __user *useraddr)
1118 {
1119 u32 user_size, dev_size;
1120 u32 *indir;
1121 int ret;
1122
1123 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1124 !dev->ethtool_ops->get_rxfh)
1125 return -EOPNOTSUPP;
1126 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1127 if (dev_size == 0)
1128 return -EOPNOTSUPP;
1129
1130 if (copy_from_user(&user_size,
1131 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1132 sizeof(user_size)))
1133 return -EFAULT;
1134
1135 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1136 &dev_size, sizeof(dev_size)))
1137 return -EFAULT;
1138
1139 /* If the user buffer size is 0, this is just a query for the
1140 * device table size. Otherwise, if it's smaller than the
1141 * device table size it's an error.
1142 */
1143 if (user_size < dev_size)
1144 return user_size == 0 ? 0 : -EINVAL;
1145
1146 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1147 if (!indir)
1148 return -ENOMEM;
1149
1150 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1151 if (ret)
1152 goto out;
1153
1154 if (copy_to_user(useraddr +
1155 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1156 indir, dev_size * sizeof(indir[0])))
1157 ret = -EFAULT;
1158
1159 out:
1160 kfree(indir);
1161 return ret;
1162 }
1163
1164 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1165 void __user *useraddr)
1166 {
1167 struct ethtool_rxnfc rx_rings;
1168 u32 user_size, dev_size, i;
1169 u32 *indir;
1170 const struct ethtool_ops *ops = dev->ethtool_ops;
1171 int ret;
1172 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1173
1174 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1175 !ops->get_rxnfc)
1176 return -EOPNOTSUPP;
1177
1178 dev_size = ops->get_rxfh_indir_size(dev);
1179 if (dev_size == 0)
1180 return -EOPNOTSUPP;
1181
1182 if (copy_from_user(&user_size,
1183 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1184 sizeof(user_size)))
1185 return -EFAULT;
1186
1187 if (user_size != 0 && user_size != dev_size)
1188 return -EINVAL;
1189
1190 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1191 if (!indir)
1192 return -ENOMEM;
1193
1194 rx_rings.cmd = ETHTOOL_GRXRINGS;
1195 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1196 if (ret)
1197 goto out;
1198
1199 if (user_size == 0) {
1200 for (i = 0; i < dev_size; i++)
1201 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1202 } else {
1203 ret = ethtool_copy_validate_indir(indir,
1204 useraddr + ringidx_offset,
1205 &rx_rings,
1206 dev_size);
1207 if (ret)
1208 goto out;
1209 }
1210
1211 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1212 if (ret)
1213 goto out;
1214
1215 /* indicate whether rxfh was set to default */
1216 if (user_size == 0)
1217 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1218 else
1219 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1220
1221 out:
1222 kfree(indir);
1223 return ret;
1224 }
1225
1226 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1227 void __user *useraddr)
1228 {
1229 int ret;
1230 const struct ethtool_ops *ops = dev->ethtool_ops;
1231 u32 user_indir_size, user_key_size;
1232 u32 dev_indir_size = 0, dev_key_size = 0;
1233 struct ethtool_rxfh rxfh;
1234 u32 total_size;
1235 u32 indir_bytes;
1236 u32 *indir = NULL;
1237 u8 dev_hfunc = 0;
1238 u8 *hkey = NULL;
1239 u8 *rss_config;
1240
1241 if (!ops->get_rxfh)
1242 return -EOPNOTSUPP;
1243
1244 if (ops->get_rxfh_indir_size)
1245 dev_indir_size = ops->get_rxfh_indir_size(dev);
1246 if (ops->get_rxfh_key_size)
1247 dev_key_size = ops->get_rxfh_key_size(dev);
1248
1249 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1250 return -EFAULT;
1251 user_indir_size = rxfh.indir_size;
1252 user_key_size = rxfh.key_size;
1253
1254 /* Check that reserved fields are 0 for now */
1255 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1256 rxfh.rsvd8[2] || rxfh.rsvd32)
1257 return -EINVAL;
1258
1259 rxfh.indir_size = dev_indir_size;
1260 rxfh.key_size = dev_key_size;
1261 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1262 return -EFAULT;
1263
1264 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1265 (user_key_size && (user_key_size != dev_key_size)))
1266 return -EINVAL;
1267
1268 indir_bytes = user_indir_size * sizeof(indir[0]);
1269 total_size = indir_bytes + user_key_size;
1270 rss_config = kzalloc(total_size, GFP_USER);
1271 if (!rss_config)
1272 return -ENOMEM;
1273
1274 if (user_indir_size)
1275 indir = (u32 *)rss_config;
1276
1277 if (user_key_size)
1278 hkey = rss_config + indir_bytes;
1279
1280 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1281 if (ret)
1282 goto out;
1283
1284 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1285 &dev_hfunc, sizeof(rxfh.hfunc))) {
1286 ret = -EFAULT;
1287 } else if (copy_to_user(useraddr +
1288 offsetof(struct ethtool_rxfh, rss_config[0]),
1289 rss_config, total_size)) {
1290 ret = -EFAULT;
1291 }
1292 out:
1293 kfree(rss_config);
1294
1295 return ret;
1296 }
1297
1298 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1299 void __user *useraddr)
1300 {
1301 int ret;
1302 const struct ethtool_ops *ops = dev->ethtool_ops;
1303 struct ethtool_rxnfc rx_rings;
1304 struct ethtool_rxfh rxfh;
1305 u32 dev_indir_size = 0, dev_key_size = 0, i;
1306 u32 *indir = NULL, indir_bytes = 0;
1307 u8 *hkey = NULL;
1308 u8 *rss_config;
1309 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1310
1311 if (!ops->get_rxnfc || !ops->set_rxfh)
1312 return -EOPNOTSUPP;
1313
1314 if (ops->get_rxfh_indir_size)
1315 dev_indir_size = ops->get_rxfh_indir_size(dev);
1316 if (ops->get_rxfh_key_size)
1317 dev_key_size = ops->get_rxfh_key_size(dev);
1318
1319 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1320 return -EFAULT;
1321
1322 /* Check that reserved fields are 0 for now */
1323 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1324 rxfh.rsvd8[2] || rxfh.rsvd32)
1325 return -EINVAL;
1326
1327 /* If either indir, hash key or function is valid, proceed further.
1328 * Must request at least one change: indir size, hash key or function.
1329 */
1330 if ((rxfh.indir_size &&
1331 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1332 rxfh.indir_size != dev_indir_size) ||
1333 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1334 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1335 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1336 return -EINVAL;
1337
1338 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1339 indir_bytes = dev_indir_size * sizeof(indir[0]);
1340
1341 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1342 if (!rss_config)
1343 return -ENOMEM;
1344
1345 rx_rings.cmd = ETHTOOL_GRXRINGS;
1346 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1347 if (ret)
1348 goto out;
1349
1350 /* rxfh.indir_size == 0 means reset the indir table to default.
1351 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1352 */
1353 if (rxfh.indir_size &&
1354 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1355 indir = (u32 *)rss_config;
1356 ret = ethtool_copy_validate_indir(indir,
1357 useraddr + rss_cfg_offset,
1358 &rx_rings,
1359 rxfh.indir_size);
1360 if (ret)
1361 goto out;
1362 } else if (rxfh.indir_size == 0) {
1363 indir = (u32 *)rss_config;
1364 for (i = 0; i < dev_indir_size; i++)
1365 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1366 }
1367
1368 if (rxfh.key_size) {
1369 hkey = rss_config + indir_bytes;
1370 if (copy_from_user(hkey,
1371 useraddr + rss_cfg_offset + indir_bytes,
1372 rxfh.key_size)) {
1373 ret = -EFAULT;
1374 goto out;
1375 }
1376 }
1377
1378 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1379 if (ret)
1380 goto out;
1381
1382 /* indicate whether rxfh was set to default */
1383 if (rxfh.indir_size == 0)
1384 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1385 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1386 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1387
1388 out:
1389 kfree(rss_config);
1390 return ret;
1391 }
1392
1393 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1394 {
1395 struct ethtool_regs regs;
1396 const struct ethtool_ops *ops = dev->ethtool_ops;
1397 void *regbuf;
1398 int reglen, ret;
1399
1400 if (!ops->get_regs || !ops->get_regs_len)
1401 return -EOPNOTSUPP;
1402
1403 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1404 return -EFAULT;
1405
1406 reglen = ops->get_regs_len(dev);
1407 if (regs.len > reglen)
1408 regs.len = reglen;
1409
1410 regbuf = NULL;
1411 if (reglen) {
1412 regbuf = vzalloc(reglen);
1413 if (!regbuf)
1414 return -ENOMEM;
1415 }
1416
1417 ops->get_regs(dev, &regs, regbuf);
1418
1419 ret = -EFAULT;
1420 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1421 goto out;
1422 useraddr += offsetof(struct ethtool_regs, data);
1423 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1424 goto out;
1425 ret = 0;
1426
1427 out:
1428 vfree(regbuf);
1429 return ret;
1430 }
1431
1432 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1433 {
1434 struct ethtool_value reset;
1435 int ret;
1436
1437 if (!dev->ethtool_ops->reset)
1438 return -EOPNOTSUPP;
1439
1440 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1441 return -EFAULT;
1442
1443 ret = dev->ethtool_ops->reset(dev, &reset.data);
1444 if (ret)
1445 return ret;
1446
1447 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1448 return -EFAULT;
1449 return 0;
1450 }
1451
1452 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1453 {
1454 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1455
1456 if (!dev->ethtool_ops->get_wol)
1457 return -EOPNOTSUPP;
1458
1459 dev->ethtool_ops->get_wol(dev, &wol);
1460
1461 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1462 return -EFAULT;
1463 return 0;
1464 }
1465
1466 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1467 {
1468 struct ethtool_wolinfo wol;
1469
1470 if (!dev->ethtool_ops->set_wol)
1471 return -EOPNOTSUPP;
1472
1473 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1474 return -EFAULT;
1475
1476 return dev->ethtool_ops->set_wol(dev, &wol);
1477 }
1478
1479 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1480 {
1481 struct ethtool_eee edata;
1482 int rc;
1483
1484 if (!dev->ethtool_ops->get_eee)
1485 return -EOPNOTSUPP;
1486
1487 memset(&edata, 0, sizeof(struct ethtool_eee));
1488 edata.cmd = ETHTOOL_GEEE;
1489 rc = dev->ethtool_ops->get_eee(dev, &edata);
1490
1491 if (rc)
1492 return rc;
1493
1494 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1495 return -EFAULT;
1496
1497 return 0;
1498 }
1499
1500 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1501 {
1502 struct ethtool_eee edata;
1503
1504 if (!dev->ethtool_ops->set_eee)
1505 return -EOPNOTSUPP;
1506
1507 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1508 return -EFAULT;
1509
1510 return dev->ethtool_ops->set_eee(dev, &edata);
1511 }
1512
1513 static int ethtool_nway_reset(struct net_device *dev)
1514 {
1515 if (!dev->ethtool_ops->nway_reset)
1516 return -EOPNOTSUPP;
1517
1518 return dev->ethtool_ops->nway_reset(dev);
1519 }
1520
1521 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1522 {
1523 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1524
1525 if (!dev->ethtool_ops->get_link)
1526 return -EOPNOTSUPP;
1527
1528 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1529
1530 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1531 return -EFAULT;
1532 return 0;
1533 }
1534
1535 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1536 int (*getter)(struct net_device *,
1537 struct ethtool_eeprom *, u8 *),
1538 u32 total_len)
1539 {
1540 struct ethtool_eeprom eeprom;
1541 void __user *userbuf = useraddr + sizeof(eeprom);
1542 u32 bytes_remaining;
1543 u8 *data;
1544 int ret = 0;
1545
1546 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1547 return -EFAULT;
1548
1549 /* Check for wrap and zero */
1550 if (eeprom.offset + eeprom.len <= eeprom.offset)
1551 return -EINVAL;
1552
1553 /* Check for exceeding total eeprom len */
1554 if (eeprom.offset + eeprom.len > total_len)
1555 return -EINVAL;
1556
1557 data = kmalloc(PAGE_SIZE, GFP_USER);
1558 if (!data)
1559 return -ENOMEM;
1560
1561 bytes_remaining = eeprom.len;
1562 while (bytes_remaining > 0) {
1563 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1564
1565 ret = getter(dev, &eeprom, data);
1566 if (ret)
1567 break;
1568 if (copy_to_user(userbuf, data, eeprom.len)) {
1569 ret = -EFAULT;
1570 break;
1571 }
1572 userbuf += eeprom.len;
1573 eeprom.offset += eeprom.len;
1574 bytes_remaining -= eeprom.len;
1575 }
1576
1577 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1578 eeprom.offset -= eeprom.len;
1579 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1580 ret = -EFAULT;
1581
1582 kfree(data);
1583 return ret;
1584 }
1585
1586 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1587 {
1588 const struct ethtool_ops *ops = dev->ethtool_ops;
1589
1590 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1591 !ops->get_eeprom_len(dev))
1592 return -EOPNOTSUPP;
1593
1594 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1595 ops->get_eeprom_len(dev));
1596 }
1597
1598 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1599 {
1600 struct ethtool_eeprom eeprom;
1601 const struct ethtool_ops *ops = dev->ethtool_ops;
1602 void __user *userbuf = useraddr + sizeof(eeprom);
1603 u32 bytes_remaining;
1604 u8 *data;
1605 int ret = 0;
1606
1607 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1608 !ops->get_eeprom_len(dev))
1609 return -EOPNOTSUPP;
1610
1611 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1612 return -EFAULT;
1613
1614 /* Check for wrap and zero */
1615 if (eeprom.offset + eeprom.len <= eeprom.offset)
1616 return -EINVAL;
1617
1618 /* Check for exceeding total eeprom len */
1619 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1620 return -EINVAL;
1621
1622 data = kmalloc(PAGE_SIZE, GFP_USER);
1623 if (!data)
1624 return -ENOMEM;
1625
1626 bytes_remaining = eeprom.len;
1627 while (bytes_remaining > 0) {
1628 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1629
1630 if (copy_from_user(data, userbuf, eeprom.len)) {
1631 ret = -EFAULT;
1632 break;
1633 }
1634 ret = ops->set_eeprom(dev, &eeprom, data);
1635 if (ret)
1636 break;
1637 userbuf += eeprom.len;
1638 eeprom.offset += eeprom.len;
1639 bytes_remaining -= eeprom.len;
1640 }
1641
1642 kfree(data);
1643 return ret;
1644 }
1645
1646 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1647 void __user *useraddr)
1648 {
1649 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1650
1651 if (!dev->ethtool_ops->get_coalesce)
1652 return -EOPNOTSUPP;
1653
1654 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1655
1656 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1657 return -EFAULT;
1658 return 0;
1659 }
1660
1661 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1662 void __user *useraddr)
1663 {
1664 struct ethtool_coalesce coalesce;
1665
1666 if (!dev->ethtool_ops->set_coalesce)
1667 return -EOPNOTSUPP;
1668
1669 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1670 return -EFAULT;
1671
1672 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1673 }
1674
1675 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1676 {
1677 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1678
1679 if (!dev->ethtool_ops->get_ringparam)
1680 return -EOPNOTSUPP;
1681
1682 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1683
1684 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1685 return -EFAULT;
1686 return 0;
1687 }
1688
1689 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1690 {
1691 struct ethtool_ringparam ringparam;
1692
1693 if (!dev->ethtool_ops->set_ringparam)
1694 return -EOPNOTSUPP;
1695
1696 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1697 return -EFAULT;
1698
1699 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1700 }
1701
1702 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1703 void __user *useraddr)
1704 {
1705 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1706
1707 if (!dev->ethtool_ops->get_channels)
1708 return -EOPNOTSUPP;
1709
1710 dev->ethtool_ops->get_channels(dev, &channels);
1711
1712 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1713 return -EFAULT;
1714 return 0;
1715 }
1716
1717 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1718 void __user *useraddr)
1719 {
1720 struct ethtool_channels channels, max = { .cmd = ETHTOOL_GCHANNELS };
1721 u32 max_rx_in_use = 0;
1722
1723 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1724 return -EOPNOTSUPP;
1725
1726 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1727 return -EFAULT;
1728
1729 dev->ethtool_ops->get_channels(dev, &max);
1730
1731 /* ensure new counts are within the maximums */
1732 if ((channels.rx_count > max.max_rx) ||
1733 (channels.tx_count > max.max_tx) ||
1734 (channels.combined_count > max.max_combined) ||
1735 (channels.other_count > max.max_other))
1736 return -EINVAL;
1737
1738 /* ensure the new Rx count fits within the configured Rx flow
1739 * indirection table settings */
1740 if (netif_is_rxfh_configured(dev) &&
1741 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1742 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1743 return -EINVAL;
1744
1745 return dev->ethtool_ops->set_channels(dev, &channels);
1746 }
1747
1748 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1749 {
1750 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1751
1752 if (!dev->ethtool_ops->get_pauseparam)
1753 return -EOPNOTSUPP;
1754
1755 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1756
1757 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1758 return -EFAULT;
1759 return 0;
1760 }
1761
1762 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1763 {
1764 struct ethtool_pauseparam pauseparam;
1765
1766 if (!dev->ethtool_ops->set_pauseparam)
1767 return -EOPNOTSUPP;
1768
1769 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1770 return -EFAULT;
1771
1772 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1773 }
1774
1775 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1776 {
1777 struct ethtool_test test;
1778 const struct ethtool_ops *ops = dev->ethtool_ops;
1779 u64 *data;
1780 int ret, test_len;
1781
1782 if (!ops->self_test || !ops->get_sset_count)
1783 return -EOPNOTSUPP;
1784
1785 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1786 if (test_len < 0)
1787 return test_len;
1788 WARN_ON(test_len == 0);
1789
1790 if (copy_from_user(&test, useraddr, sizeof(test)))
1791 return -EFAULT;
1792
1793 test.len = test_len;
1794 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1795 if (!data)
1796 return -ENOMEM;
1797
1798 ops->self_test(dev, &test, data);
1799
1800 ret = -EFAULT;
1801 if (copy_to_user(useraddr, &test, sizeof(test)))
1802 goto out;
1803 useraddr += sizeof(test);
1804 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1805 goto out;
1806 ret = 0;
1807
1808 out:
1809 kfree(data);
1810 return ret;
1811 }
1812
1813 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1814 {
1815 struct ethtool_gstrings gstrings;
1816 u8 *data;
1817 int ret;
1818
1819 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1820 return -EFAULT;
1821
1822 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1823 if (ret < 0)
1824 return ret;
1825 if (ret > S32_MAX / ETH_GSTRING_LEN)
1826 return -ENOMEM;
1827 WARN_ON_ONCE(!ret);
1828
1829 gstrings.len = ret;
1830 data = vzalloc(gstrings.len * ETH_GSTRING_LEN);
1831 if (gstrings.len && !data)
1832 return -ENOMEM;
1833
1834 __ethtool_get_strings(dev, gstrings.string_set, data);
1835
1836 ret = -EFAULT;
1837 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1838 goto out;
1839 useraddr += sizeof(gstrings);
1840 if (gstrings.len &&
1841 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1842 goto out;
1843 ret = 0;
1844
1845 out:
1846 vfree(data);
1847 return ret;
1848 }
1849
1850 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1851 {
1852 struct ethtool_value id;
1853 static bool busy;
1854 const struct ethtool_ops *ops = dev->ethtool_ops;
1855 int rc;
1856
1857 if (!ops->set_phys_id)
1858 return -EOPNOTSUPP;
1859
1860 if (busy)
1861 return -EBUSY;
1862
1863 if (copy_from_user(&id, useraddr, sizeof(id)))
1864 return -EFAULT;
1865
1866 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1867 if (rc < 0)
1868 return rc;
1869
1870 /* Drop the RTNL lock while waiting, but prevent reentry or
1871 * removal of the device.
1872 */
1873 busy = true;
1874 dev_hold(dev);
1875 rtnl_unlock();
1876
1877 if (rc == 0) {
1878 /* Driver will handle this itself */
1879 schedule_timeout_interruptible(
1880 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1881 } else {
1882 /* Driver expects to be called at twice the frequency in rc */
1883 int n = rc * 2, i, interval = HZ / n;
1884
1885 /* Count down seconds */
1886 do {
1887 /* Count down iterations per second */
1888 i = n;
1889 do {
1890 rtnl_lock();
1891 rc = ops->set_phys_id(dev,
1892 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1893 rtnl_unlock();
1894 if (rc)
1895 break;
1896 schedule_timeout_interruptible(interval);
1897 } while (!signal_pending(current) && --i != 0);
1898 } while (!signal_pending(current) &&
1899 (id.data == 0 || --id.data != 0));
1900 }
1901
1902 rtnl_lock();
1903 dev_put(dev);
1904 busy = false;
1905
1906 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1907 return rc;
1908 }
1909
1910 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1911 {
1912 struct ethtool_stats stats;
1913 const struct ethtool_ops *ops = dev->ethtool_ops;
1914 u64 *data;
1915 int ret, n_stats;
1916
1917 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1918 return -EOPNOTSUPP;
1919
1920 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1921 if (n_stats < 0)
1922 return n_stats;
1923 if (n_stats > S32_MAX / sizeof(u64))
1924 return -ENOMEM;
1925 WARN_ON_ONCE(!n_stats);
1926 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1927 return -EFAULT;
1928
1929 stats.n_stats = n_stats;
1930 data = vzalloc(n_stats * sizeof(u64));
1931 if (n_stats && !data)
1932 return -ENOMEM;
1933
1934 ops->get_ethtool_stats(dev, &stats, data);
1935
1936 ret = -EFAULT;
1937 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1938 goto out;
1939 useraddr += sizeof(stats);
1940 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1941 goto out;
1942 ret = 0;
1943
1944 out:
1945 vfree(data);
1946 return ret;
1947 }
1948
1949 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1950 {
1951 struct ethtool_stats stats;
1952 struct phy_device *phydev = dev->phydev;
1953 u64 *data;
1954 int ret, n_stats;
1955
1956 if (!phydev)
1957 return -EOPNOTSUPP;
1958
1959 n_stats = phy_get_sset_count(phydev);
1960 if (n_stats < 0)
1961 return n_stats;
1962 if (n_stats > S32_MAX / sizeof(u64))
1963 return -ENOMEM;
1964 WARN_ON_ONCE(!n_stats);
1965
1966 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1967 return -EFAULT;
1968
1969 stats.n_stats = n_stats;
1970 data = vzalloc(n_stats * sizeof(u64));
1971 if (n_stats && !data)
1972 return -ENOMEM;
1973
1974 mutex_lock(&phydev->lock);
1975 phydev->drv->get_stats(phydev, &stats, data);
1976 mutex_unlock(&phydev->lock);
1977
1978 ret = -EFAULT;
1979 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1980 goto out;
1981 useraddr += sizeof(stats);
1982 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1983 goto out;
1984 ret = 0;
1985
1986 out:
1987 vfree(data);
1988 return ret;
1989 }
1990
1991 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1992 {
1993 struct ethtool_perm_addr epaddr;
1994
1995 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1996 return -EFAULT;
1997
1998 if (epaddr.size < dev->addr_len)
1999 return -ETOOSMALL;
2000 epaddr.size = dev->addr_len;
2001
2002 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2003 return -EFAULT;
2004 useraddr += sizeof(epaddr);
2005 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2006 return -EFAULT;
2007 return 0;
2008 }
2009
2010 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2011 u32 cmd, u32 (*actor)(struct net_device *))
2012 {
2013 struct ethtool_value edata = { .cmd = cmd };
2014
2015 if (!actor)
2016 return -EOPNOTSUPP;
2017
2018 edata.data = actor(dev);
2019
2020 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2021 return -EFAULT;
2022 return 0;
2023 }
2024
2025 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2026 void (*actor)(struct net_device *, u32))
2027 {
2028 struct ethtool_value edata;
2029
2030 if (!actor)
2031 return -EOPNOTSUPP;
2032
2033 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2034 return -EFAULT;
2035
2036 actor(dev, edata.data);
2037 return 0;
2038 }
2039
2040 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2041 int (*actor)(struct net_device *, u32))
2042 {
2043 struct ethtool_value edata;
2044
2045 if (!actor)
2046 return -EOPNOTSUPP;
2047
2048 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2049 return -EFAULT;
2050
2051 return actor(dev, edata.data);
2052 }
2053
2054 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2055 char __user *useraddr)
2056 {
2057 struct ethtool_flash efl;
2058
2059 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2060 return -EFAULT;
2061
2062 if (!dev->ethtool_ops->flash_device)
2063 return -EOPNOTSUPP;
2064
2065 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2066
2067 return dev->ethtool_ops->flash_device(dev, &efl);
2068 }
2069
2070 static int ethtool_set_dump(struct net_device *dev,
2071 void __user *useraddr)
2072 {
2073 struct ethtool_dump dump;
2074
2075 if (!dev->ethtool_ops->set_dump)
2076 return -EOPNOTSUPP;
2077
2078 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2079 return -EFAULT;
2080
2081 return dev->ethtool_ops->set_dump(dev, &dump);
2082 }
2083
2084 static int ethtool_get_dump_flag(struct net_device *dev,
2085 void __user *useraddr)
2086 {
2087 int ret;
2088 struct ethtool_dump dump;
2089 const struct ethtool_ops *ops = dev->ethtool_ops;
2090
2091 if (!ops->get_dump_flag)
2092 return -EOPNOTSUPP;
2093
2094 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2095 return -EFAULT;
2096
2097 ret = ops->get_dump_flag(dev, &dump);
2098 if (ret)
2099 return ret;
2100
2101 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2102 return -EFAULT;
2103 return 0;
2104 }
2105
2106 static int ethtool_get_dump_data(struct net_device *dev,
2107 void __user *useraddr)
2108 {
2109 int ret;
2110 __u32 len;
2111 struct ethtool_dump dump, tmp;
2112 const struct ethtool_ops *ops = dev->ethtool_ops;
2113 void *data = NULL;
2114
2115 if (!ops->get_dump_data || !ops->get_dump_flag)
2116 return -EOPNOTSUPP;
2117
2118 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2119 return -EFAULT;
2120
2121 memset(&tmp, 0, sizeof(tmp));
2122 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2123 ret = ops->get_dump_flag(dev, &tmp);
2124 if (ret)
2125 return ret;
2126
2127 len = min(tmp.len, dump.len);
2128 if (!len)
2129 return -EFAULT;
2130
2131 /* Don't ever let the driver think there's more space available
2132 * than it requested with .get_dump_flag().
2133 */
2134 dump.len = len;
2135
2136 /* Always allocate enough space to hold the whole thing so that the
2137 * driver does not need to check the length and bother with partial
2138 * dumping.
2139 */
2140 data = vzalloc(tmp.len);
2141 if (!data)
2142 return -ENOMEM;
2143 ret = ops->get_dump_data(dev, &dump, data);
2144 if (ret)
2145 goto out;
2146
2147 /* There are two sane possibilities:
2148 * 1. The driver's .get_dump_data() does not touch dump.len.
2149 * 2. Or it may set dump.len to how much it really writes, which
2150 * should be tmp.len (or len if it can do a partial dump).
2151 * In any case respond to userspace with the actual length of data
2152 * it's receiving.
2153 */
2154 WARN_ON(dump.len != len && dump.len != tmp.len);
2155 dump.len = len;
2156
2157 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2158 ret = -EFAULT;
2159 goto out;
2160 }
2161 useraddr += offsetof(struct ethtool_dump, data);
2162 if (copy_to_user(useraddr, data, len))
2163 ret = -EFAULT;
2164 out:
2165 vfree(data);
2166 return ret;
2167 }
2168
2169 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2170 {
2171 int err = 0;
2172 struct ethtool_ts_info info;
2173 const struct ethtool_ops *ops = dev->ethtool_ops;
2174 struct phy_device *phydev = dev->phydev;
2175
2176 memset(&info, 0, sizeof(info));
2177 info.cmd = ETHTOOL_GET_TS_INFO;
2178
2179 if (phydev && phydev->drv && phydev->drv->ts_info) {
2180 err = phydev->drv->ts_info(phydev, &info);
2181 } else if (ops->get_ts_info) {
2182 err = ops->get_ts_info(dev, &info);
2183 } else {
2184 info.so_timestamping =
2185 SOF_TIMESTAMPING_RX_SOFTWARE |
2186 SOF_TIMESTAMPING_SOFTWARE;
2187 info.phc_index = -1;
2188 }
2189
2190 if (err)
2191 return err;
2192
2193 if (copy_to_user(useraddr, &info, sizeof(info)))
2194 err = -EFAULT;
2195
2196 return err;
2197 }
2198
2199 static int __ethtool_get_module_info(struct net_device *dev,
2200 struct ethtool_modinfo *modinfo)
2201 {
2202 const struct ethtool_ops *ops = dev->ethtool_ops;
2203 struct phy_device *phydev = dev->phydev;
2204
2205 if (phydev && phydev->drv && phydev->drv->module_info)
2206 return phydev->drv->module_info(phydev, modinfo);
2207
2208 if (ops->get_module_info)
2209 return ops->get_module_info(dev, modinfo);
2210
2211 return -EOPNOTSUPP;
2212 }
2213
2214 static int ethtool_get_module_info(struct net_device *dev,
2215 void __user *useraddr)
2216 {
2217 int ret;
2218 struct ethtool_modinfo modinfo;
2219
2220 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2221 return -EFAULT;
2222
2223 ret = __ethtool_get_module_info(dev, &modinfo);
2224 if (ret)
2225 return ret;
2226
2227 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2228 return -EFAULT;
2229
2230 return 0;
2231 }
2232
2233 static int __ethtool_get_module_eeprom(struct net_device *dev,
2234 struct ethtool_eeprom *ee, u8 *data)
2235 {
2236 const struct ethtool_ops *ops = dev->ethtool_ops;
2237 struct phy_device *phydev = dev->phydev;
2238
2239 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2240 return phydev->drv->module_eeprom(phydev, ee, data);
2241
2242 if (ops->get_module_eeprom)
2243 return ops->get_module_eeprom(dev, ee, data);
2244
2245 return -EOPNOTSUPP;
2246 }
2247
2248 static int ethtool_get_module_eeprom(struct net_device *dev,
2249 void __user *useraddr)
2250 {
2251 int ret;
2252 struct ethtool_modinfo modinfo;
2253
2254 ret = __ethtool_get_module_info(dev, &modinfo);
2255 if (ret)
2256 return ret;
2257
2258 return ethtool_get_any_eeprom(dev, useraddr,
2259 __ethtool_get_module_eeprom,
2260 modinfo.eeprom_len);
2261 }
2262
2263 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2264 {
2265 switch (tuna->id) {
2266 case ETHTOOL_RX_COPYBREAK:
2267 case ETHTOOL_TX_COPYBREAK:
2268 if (tuna->len != sizeof(u32) ||
2269 tuna->type_id != ETHTOOL_TUNABLE_U32)
2270 return -EINVAL;
2271 break;
2272 default:
2273 return -EINVAL;
2274 }
2275
2276 return 0;
2277 }
2278
2279 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2280 {
2281 int ret;
2282 struct ethtool_tunable tuna;
2283 const struct ethtool_ops *ops = dev->ethtool_ops;
2284 void *data;
2285
2286 if (!ops->get_tunable)
2287 return -EOPNOTSUPP;
2288 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2289 return -EFAULT;
2290 ret = ethtool_tunable_valid(&tuna);
2291 if (ret)
2292 return ret;
2293 data = kmalloc(tuna.len, GFP_USER);
2294 if (!data)
2295 return -ENOMEM;
2296 ret = ops->get_tunable(dev, &tuna, data);
2297 if (ret)
2298 goto out;
2299 useraddr += sizeof(tuna);
2300 ret = -EFAULT;
2301 if (copy_to_user(useraddr, data, tuna.len))
2302 goto out;
2303 ret = 0;
2304
2305 out:
2306 kfree(data);
2307 return ret;
2308 }
2309
2310 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2311 {
2312 int ret;
2313 struct ethtool_tunable tuna;
2314 const struct ethtool_ops *ops = dev->ethtool_ops;
2315 void *data;
2316
2317 if (!ops->set_tunable)
2318 return -EOPNOTSUPP;
2319 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2320 return -EFAULT;
2321 ret = ethtool_tunable_valid(&tuna);
2322 if (ret)
2323 return ret;
2324 useraddr += sizeof(tuna);
2325 data = memdup_user(useraddr, tuna.len);
2326 if (IS_ERR(data))
2327 return PTR_ERR(data);
2328 ret = ops->set_tunable(dev, &tuna, data);
2329
2330 kfree(data);
2331 return ret;
2332 }
2333
2334 static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2335 void __user *useraddr,
2336 struct ethtool_per_queue_op *per_queue_opt)
2337 {
2338 u32 bit;
2339 int ret;
2340 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2341
2342 if (!dev->ethtool_ops->get_per_queue_coalesce)
2343 return -EOPNOTSUPP;
2344
2345 useraddr += sizeof(*per_queue_opt);
2346
2347 bitmap_from_u32array(queue_mask,
2348 MAX_NUM_QUEUE,
2349 per_queue_opt->queue_mask,
2350 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2351
2352 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2353 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2354
2355 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2356 if (ret != 0)
2357 return ret;
2358 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2359 return -EFAULT;
2360 useraddr += sizeof(coalesce);
2361 }
2362
2363 return 0;
2364 }
2365
2366 static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2367 void __user *useraddr,
2368 struct ethtool_per_queue_op *per_queue_opt)
2369 {
2370 u32 bit;
2371 int i, ret = 0;
2372 int n_queue;
2373 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2374 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2375
2376 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2377 (!dev->ethtool_ops->get_per_queue_coalesce))
2378 return -EOPNOTSUPP;
2379
2380 useraddr += sizeof(*per_queue_opt);
2381
2382 bitmap_from_u32array(queue_mask,
2383 MAX_NUM_QUEUE,
2384 per_queue_opt->queue_mask,
2385 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2386 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2387 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2388 if (!backup)
2389 return -ENOMEM;
2390
2391 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2392 struct ethtool_coalesce coalesce;
2393
2394 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2395 if (ret != 0)
2396 goto roll_back;
2397
2398 tmp++;
2399
2400 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2401 ret = -EFAULT;
2402 goto roll_back;
2403 }
2404
2405 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2406 if (ret != 0)
2407 goto roll_back;
2408
2409 useraddr += sizeof(coalesce);
2410 }
2411
2412 roll_back:
2413 if (ret != 0) {
2414 tmp = backup;
2415 for_each_set_bit(i, queue_mask, bit) {
2416 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2417 tmp++;
2418 }
2419 }
2420 kfree(backup);
2421
2422 return ret;
2423 }
2424
2425 static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2426 {
2427 struct ethtool_per_queue_op per_queue_opt;
2428
2429 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2430 return -EFAULT;
2431
2432 switch (per_queue_opt.sub_command) {
2433 case ETHTOOL_GCOALESCE:
2434 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2435 case ETHTOOL_SCOALESCE:
2436 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2437 default:
2438 return -EOPNOTSUPP;
2439 };
2440 }
2441
2442 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2443 {
2444 switch (tuna->id) {
2445 case ETHTOOL_PHY_DOWNSHIFT:
2446 if (tuna->len != sizeof(u8) ||
2447 tuna->type_id != ETHTOOL_TUNABLE_U8)
2448 return -EINVAL;
2449 break;
2450 default:
2451 return -EINVAL;
2452 }
2453
2454 return 0;
2455 }
2456
2457 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2458 {
2459 int ret;
2460 struct ethtool_tunable tuna;
2461 struct phy_device *phydev = dev->phydev;
2462 void *data;
2463
2464 if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2465 return -EOPNOTSUPP;
2466
2467 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2468 return -EFAULT;
2469 ret = ethtool_phy_tunable_valid(&tuna);
2470 if (ret)
2471 return ret;
2472 data = kmalloc(tuna.len, GFP_USER);
2473 if (!data)
2474 return -ENOMEM;
2475 mutex_lock(&phydev->lock);
2476 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2477 mutex_unlock(&phydev->lock);
2478 if (ret)
2479 goto out;
2480 useraddr += sizeof(tuna);
2481 ret = -EFAULT;
2482 if (copy_to_user(useraddr, data, tuna.len))
2483 goto out;
2484 ret = 0;
2485
2486 out:
2487 kfree(data);
2488 return ret;
2489 }
2490
2491 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2492 {
2493 int ret;
2494 struct ethtool_tunable tuna;
2495 struct phy_device *phydev = dev->phydev;
2496 void *data;
2497
2498 if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2499 return -EOPNOTSUPP;
2500 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2501 return -EFAULT;
2502 ret = ethtool_phy_tunable_valid(&tuna);
2503 if (ret)
2504 return ret;
2505 useraddr += sizeof(tuna);
2506 data = memdup_user(useraddr, tuna.len);
2507 if (IS_ERR(data))
2508 return PTR_ERR(data);
2509 mutex_lock(&phydev->lock);
2510 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2511 mutex_unlock(&phydev->lock);
2512
2513 kfree(data);
2514 return ret;
2515 }
2516
2517 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2518 {
2519 struct ethtool_fecparam fecparam = { ETHTOOL_GFECPARAM };
2520
2521 if (!dev->ethtool_ops->get_fecparam)
2522 return -EOPNOTSUPP;
2523
2524 dev->ethtool_ops->get_fecparam(dev, &fecparam);
2525
2526 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2527 return -EFAULT;
2528 return 0;
2529 }
2530
2531 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2532 {
2533 struct ethtool_fecparam fecparam;
2534
2535 if (!dev->ethtool_ops->set_fecparam)
2536 return -EOPNOTSUPP;
2537
2538 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2539 return -EFAULT;
2540
2541 return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2542 }
2543
2544 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
2545
2546 int dev_ethtool(struct net *net, struct ifreq *ifr)
2547 {
2548 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2549 void __user *useraddr = ifr->ifr_data;
2550 u32 ethcmd, sub_cmd;
2551 int rc;
2552 netdev_features_t old_features;
2553
2554 if (!dev || !netif_device_present(dev))
2555 return -ENODEV;
2556
2557 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2558 return -EFAULT;
2559
2560 if (ethcmd == ETHTOOL_PERQUEUE) {
2561 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2562 return -EFAULT;
2563 } else {
2564 sub_cmd = ethcmd;
2565 }
2566 /* Allow some commands to be done by anyone */
2567 switch (sub_cmd) {
2568 case ETHTOOL_GSET:
2569 case ETHTOOL_GDRVINFO:
2570 case ETHTOOL_GMSGLVL:
2571 case ETHTOOL_GLINK:
2572 case ETHTOOL_GCOALESCE:
2573 case ETHTOOL_GRINGPARAM:
2574 case ETHTOOL_GPAUSEPARAM:
2575 case ETHTOOL_GRXCSUM:
2576 case ETHTOOL_GTXCSUM:
2577 case ETHTOOL_GSG:
2578 case ETHTOOL_GSSET_INFO:
2579 case ETHTOOL_GSTRINGS:
2580 case ETHTOOL_GSTATS:
2581 case ETHTOOL_GPHYSTATS:
2582 case ETHTOOL_GTSO:
2583 case ETHTOOL_GPERMADDR:
2584 case ETHTOOL_GGSO:
2585 case ETHTOOL_GGRO:
2586 case ETHTOOL_GFLAGS:
2587 case ETHTOOL_GPFLAGS:
2588 case ETHTOOL_GRXFH:
2589 case ETHTOOL_GRXRINGS:
2590 case ETHTOOL_GRXCLSRLCNT:
2591 case ETHTOOL_GRXCLSRULE:
2592 case ETHTOOL_GRXCLSRLALL:
2593 case ETHTOOL_GRXFHINDIR:
2594 case ETHTOOL_GRSSH:
2595 case ETHTOOL_GFEATURES:
2596 case ETHTOOL_GCHANNELS:
2597 case ETHTOOL_GET_TS_INFO:
2598 case ETHTOOL_GEEE:
2599 case ETHTOOL_GTUNABLE:
2600 case ETHTOOL_PHY_GTUNABLE:
2601 case ETHTOOL_GLINKSETTINGS:
2602 case ETHTOOL_GFECPARAM:
2603 break;
2604 default:
2605 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2606 return -EPERM;
2607 }
2608
2609 if (dev->ethtool_ops->begin) {
2610 rc = dev->ethtool_ops->begin(dev);
2611 if (rc < 0)
2612 return rc;
2613 }
2614 old_features = dev->features;
2615
2616 switch (ethcmd) {
2617 case ETHTOOL_GSET:
2618 rc = ethtool_get_settings(dev, useraddr);
2619 break;
2620 case ETHTOOL_SSET:
2621 rc = ethtool_set_settings(dev, useraddr);
2622 break;
2623 case ETHTOOL_GDRVINFO:
2624 rc = ethtool_get_drvinfo(dev, useraddr);
2625 break;
2626 case ETHTOOL_GREGS:
2627 rc = ethtool_get_regs(dev, useraddr);
2628 break;
2629 case ETHTOOL_GWOL:
2630 rc = ethtool_get_wol(dev, useraddr);
2631 break;
2632 case ETHTOOL_SWOL:
2633 rc = ethtool_set_wol(dev, useraddr);
2634 break;
2635 case ETHTOOL_GMSGLVL:
2636 rc = ethtool_get_value(dev, useraddr, ethcmd,
2637 dev->ethtool_ops->get_msglevel);
2638 break;
2639 case ETHTOOL_SMSGLVL:
2640 rc = ethtool_set_value_void(dev, useraddr,
2641 dev->ethtool_ops->set_msglevel);
2642 break;
2643 case ETHTOOL_GEEE:
2644 rc = ethtool_get_eee(dev, useraddr);
2645 break;
2646 case ETHTOOL_SEEE:
2647 rc = ethtool_set_eee(dev, useraddr);
2648 break;
2649 case ETHTOOL_NWAY_RST:
2650 rc = ethtool_nway_reset(dev);
2651 break;
2652 case ETHTOOL_GLINK:
2653 rc = ethtool_get_link(dev, useraddr);
2654 break;
2655 case ETHTOOL_GEEPROM:
2656 rc = ethtool_get_eeprom(dev, useraddr);
2657 break;
2658 case ETHTOOL_SEEPROM:
2659 rc = ethtool_set_eeprom(dev, useraddr);
2660 break;
2661 case ETHTOOL_GCOALESCE:
2662 rc = ethtool_get_coalesce(dev, useraddr);
2663 break;
2664 case ETHTOOL_SCOALESCE:
2665 rc = ethtool_set_coalesce(dev, useraddr);
2666 break;
2667 case ETHTOOL_GRINGPARAM:
2668 rc = ethtool_get_ringparam(dev, useraddr);
2669 break;
2670 case ETHTOOL_SRINGPARAM:
2671 rc = ethtool_set_ringparam(dev, useraddr);
2672 break;
2673 case ETHTOOL_GPAUSEPARAM:
2674 rc = ethtool_get_pauseparam(dev, useraddr);
2675 break;
2676 case ETHTOOL_SPAUSEPARAM:
2677 rc = ethtool_set_pauseparam(dev, useraddr);
2678 break;
2679 case ETHTOOL_TEST:
2680 rc = ethtool_self_test(dev, useraddr);
2681 break;
2682 case ETHTOOL_GSTRINGS:
2683 rc = ethtool_get_strings(dev, useraddr);
2684 break;
2685 case ETHTOOL_PHYS_ID:
2686 rc = ethtool_phys_id(dev, useraddr);
2687 break;
2688 case ETHTOOL_GSTATS:
2689 rc = ethtool_get_stats(dev, useraddr);
2690 break;
2691 case ETHTOOL_GPERMADDR:
2692 rc = ethtool_get_perm_addr(dev, useraddr);
2693 break;
2694 case ETHTOOL_GFLAGS:
2695 rc = ethtool_get_value(dev, useraddr, ethcmd,
2696 __ethtool_get_flags);
2697 break;
2698 case ETHTOOL_SFLAGS:
2699 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2700 break;
2701 case ETHTOOL_GPFLAGS:
2702 rc = ethtool_get_value(dev, useraddr, ethcmd,
2703 dev->ethtool_ops->get_priv_flags);
2704 break;
2705 case ETHTOOL_SPFLAGS:
2706 rc = ethtool_set_value(dev, useraddr,
2707 dev->ethtool_ops->set_priv_flags);
2708 break;
2709 case ETHTOOL_GRXFH:
2710 case ETHTOOL_GRXRINGS:
2711 case ETHTOOL_GRXCLSRLCNT:
2712 case ETHTOOL_GRXCLSRULE:
2713 case ETHTOOL_GRXCLSRLALL:
2714 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2715 break;
2716 case ETHTOOL_SRXFH:
2717 case ETHTOOL_SRXCLSRLDEL:
2718 case ETHTOOL_SRXCLSRLINS:
2719 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2720 break;
2721 case ETHTOOL_FLASHDEV:
2722 rc = ethtool_flash_device(dev, useraddr);
2723 break;
2724 case ETHTOOL_RESET:
2725 rc = ethtool_reset(dev, useraddr);
2726 break;
2727 case ETHTOOL_GSSET_INFO:
2728 rc = ethtool_get_sset_info(dev, useraddr);
2729 break;
2730 case ETHTOOL_GRXFHINDIR:
2731 rc = ethtool_get_rxfh_indir(dev, useraddr);
2732 break;
2733 case ETHTOOL_SRXFHINDIR:
2734 rc = ethtool_set_rxfh_indir(dev, useraddr);
2735 break;
2736 case ETHTOOL_GRSSH:
2737 rc = ethtool_get_rxfh(dev, useraddr);
2738 break;
2739 case ETHTOOL_SRSSH:
2740 rc = ethtool_set_rxfh(dev, useraddr);
2741 break;
2742 case ETHTOOL_GFEATURES:
2743 rc = ethtool_get_features(dev, useraddr);
2744 break;
2745 case ETHTOOL_SFEATURES:
2746 rc = ethtool_set_features(dev, useraddr);
2747 break;
2748 case ETHTOOL_GTXCSUM:
2749 case ETHTOOL_GRXCSUM:
2750 case ETHTOOL_GSG:
2751 case ETHTOOL_GTSO:
2752 case ETHTOOL_GGSO:
2753 case ETHTOOL_GGRO:
2754 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2755 break;
2756 case ETHTOOL_STXCSUM:
2757 case ETHTOOL_SRXCSUM:
2758 case ETHTOOL_SSG:
2759 case ETHTOOL_STSO:
2760 case ETHTOOL_SGSO:
2761 case ETHTOOL_SGRO:
2762 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2763 break;
2764 case ETHTOOL_GCHANNELS:
2765 rc = ethtool_get_channels(dev, useraddr);
2766 break;
2767 case ETHTOOL_SCHANNELS:
2768 rc = ethtool_set_channels(dev, useraddr);
2769 break;
2770 case ETHTOOL_SET_DUMP:
2771 rc = ethtool_set_dump(dev, useraddr);
2772 break;
2773 case ETHTOOL_GET_DUMP_FLAG:
2774 rc = ethtool_get_dump_flag(dev, useraddr);
2775 break;
2776 case ETHTOOL_GET_DUMP_DATA:
2777 rc = ethtool_get_dump_data(dev, useraddr);
2778 break;
2779 case ETHTOOL_GET_TS_INFO:
2780 rc = ethtool_get_ts_info(dev, useraddr);
2781 break;
2782 case ETHTOOL_GMODULEINFO:
2783 rc = ethtool_get_module_info(dev, useraddr);
2784 break;
2785 case ETHTOOL_GMODULEEEPROM:
2786 rc = ethtool_get_module_eeprom(dev, useraddr);
2787 break;
2788 case ETHTOOL_GTUNABLE:
2789 rc = ethtool_get_tunable(dev, useraddr);
2790 break;
2791 case ETHTOOL_STUNABLE:
2792 rc = ethtool_set_tunable(dev, useraddr);
2793 break;
2794 case ETHTOOL_GPHYSTATS:
2795 rc = ethtool_get_phy_stats(dev, useraddr);
2796 break;
2797 case ETHTOOL_PERQUEUE:
2798 rc = ethtool_set_per_queue(dev, useraddr);
2799 break;
2800 case ETHTOOL_GLINKSETTINGS:
2801 rc = ethtool_get_link_ksettings(dev, useraddr);
2802 break;
2803 case ETHTOOL_SLINKSETTINGS:
2804 rc = ethtool_set_link_ksettings(dev, useraddr);
2805 break;
2806 case ETHTOOL_PHY_GTUNABLE:
2807 rc = get_phy_tunable(dev, useraddr);
2808 break;
2809 case ETHTOOL_PHY_STUNABLE:
2810 rc = set_phy_tunable(dev, useraddr);
2811 break;
2812 case ETHTOOL_GFECPARAM:
2813 rc = ethtool_get_fecparam(dev, useraddr);
2814 break;
2815 case ETHTOOL_SFECPARAM:
2816 rc = ethtool_set_fecparam(dev, useraddr);
2817 break;
2818 default:
2819 rc = -EOPNOTSUPP;
2820 }
2821
2822 if (dev->ethtool_ops->complete)
2823 dev->ethtool_ops->complete(dev);
2824
2825 if (old_features != dev->features)
2826 netdev_features_change(dev);
2827
2828 return rc;
2829 }
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