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Merge tag 'drm-fixes-for-v4.14-rc1' of git://people.freedesktop.org/~airlied/linux
[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 return retval;
529 }
530
531 /* number of 32-bit words to store the user's link mode bitmaps */
532 #define __ETHTOOL_LINK_MODE_MASK_NU32 \
533 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
534
535 /* layout of the struct passed from/to userland */
536 struct ethtool_link_usettings {
537 struct ethtool_link_settings base;
538 struct {
539 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
540 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
541 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
542 } link_modes;
543 };
544
545 /* Internal kernel helper to query a device ethtool_link_settings.
546 *
547 * Backward compatibility note: for compatibility with legacy drivers
548 * that implement only the ethtool_cmd API, this has to work with both
549 * drivers implementing get_link_ksettings API and drivers
550 * implementing get_settings API. When drivers implement get_settings
551 * and report ethtool_cmd deprecated fields
552 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
553 * because the resulting struct ethtool_link_settings does not report them.
554 */
555 int __ethtool_get_link_ksettings(struct net_device *dev,
556 struct ethtool_link_ksettings *link_ksettings)
557 {
558 int err;
559 struct ethtool_cmd cmd;
560
561 ASSERT_RTNL();
562
563 if (dev->ethtool_ops->get_link_ksettings) {
564 memset(link_ksettings, 0, sizeof(*link_ksettings));
565 return dev->ethtool_ops->get_link_ksettings(dev,
566 link_ksettings);
567 }
568
569 /* driver doesn't support %ethtool_link_ksettings API. revert to
570 * legacy %ethtool_cmd API, unless it's not supported either.
571 * TODO: remove when ethtool_ops::get_settings disappears internally
572 */
573 if (!dev->ethtool_ops->get_settings)
574 return -EOPNOTSUPP;
575
576 memset(&cmd, 0, sizeof(cmd));
577 cmd.cmd = ETHTOOL_GSET;
578 err = dev->ethtool_ops->get_settings(dev, &cmd);
579 if (err < 0)
580 return err;
581
582 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
583 */
584 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
585 return err;
586 }
587 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
588
589 /* convert ethtool_link_usettings in user space to a kernel internal
590 * ethtool_link_ksettings. return 0 on success, errno on error.
591 */
592 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
593 const void __user *from)
594 {
595 struct ethtool_link_usettings link_usettings;
596
597 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
598 return -EFAULT;
599
600 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
601 bitmap_from_u32array(to->link_modes.supported,
602 __ETHTOOL_LINK_MODE_MASK_NBITS,
603 link_usettings.link_modes.supported,
604 __ETHTOOL_LINK_MODE_MASK_NU32);
605 bitmap_from_u32array(to->link_modes.advertising,
606 __ETHTOOL_LINK_MODE_MASK_NBITS,
607 link_usettings.link_modes.advertising,
608 __ETHTOOL_LINK_MODE_MASK_NU32);
609 bitmap_from_u32array(to->link_modes.lp_advertising,
610 __ETHTOOL_LINK_MODE_MASK_NBITS,
611 link_usettings.link_modes.lp_advertising,
612 __ETHTOOL_LINK_MODE_MASK_NU32);
613
614 return 0;
615 }
616
617 /* convert a kernel internal ethtool_link_ksettings to
618 * ethtool_link_usettings in user space. return 0 on success, errno on
619 * error.
620 */
621 static int
622 store_link_ksettings_for_user(void __user *to,
623 const struct ethtool_link_ksettings *from)
624 {
625 struct ethtool_link_usettings link_usettings;
626
627 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
628 bitmap_to_u32array(link_usettings.link_modes.supported,
629 __ETHTOOL_LINK_MODE_MASK_NU32,
630 from->link_modes.supported,
631 __ETHTOOL_LINK_MODE_MASK_NBITS);
632 bitmap_to_u32array(link_usettings.link_modes.advertising,
633 __ETHTOOL_LINK_MODE_MASK_NU32,
634 from->link_modes.advertising,
635 __ETHTOOL_LINK_MODE_MASK_NBITS);
636 bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
637 __ETHTOOL_LINK_MODE_MASK_NU32,
638 from->link_modes.lp_advertising,
639 __ETHTOOL_LINK_MODE_MASK_NBITS);
640
641 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
642 return -EFAULT;
643
644 return 0;
645 }
646
647 /* Query device for its ethtool_link_settings.
648 *
649 * Backward compatibility note: this function must fail when driver
650 * does not implement ethtool::get_link_ksettings, even if legacy
651 * ethtool_ops::get_settings is implemented. This tells new versions
652 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
653 * this driver, so that they can correctly access the ethtool_cmd
654 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
655 * implements ethtool_ops::get_settings anymore.
656 */
657 static int ethtool_get_link_ksettings(struct net_device *dev,
658 void __user *useraddr)
659 {
660 int err = 0;
661 struct ethtool_link_ksettings link_ksettings;
662
663 ASSERT_RTNL();
664
665 if (!dev->ethtool_ops->get_link_ksettings)
666 return -EOPNOTSUPP;
667
668 /* handle bitmap nbits handshake */
669 if (copy_from_user(&link_ksettings.base, useraddr,
670 sizeof(link_ksettings.base)))
671 return -EFAULT;
672
673 if (__ETHTOOL_LINK_MODE_MASK_NU32
674 != link_ksettings.base.link_mode_masks_nwords) {
675 /* wrong link mode nbits requested */
676 memset(&link_ksettings, 0, sizeof(link_ksettings));
677 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
678 /* send back number of words required as negative val */
679 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
680 "need too many bits for link modes!");
681 link_ksettings.base.link_mode_masks_nwords
682 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
683
684 /* copy the base fields back to user, not the link
685 * mode bitmaps
686 */
687 if (copy_to_user(useraddr, &link_ksettings.base,
688 sizeof(link_ksettings.base)))
689 return -EFAULT;
690
691 return 0;
692 }
693
694 /* handshake successful: user/kernel agree on
695 * link_mode_masks_nwords
696 */
697
698 memset(&link_ksettings, 0, sizeof(link_ksettings));
699 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
700 if (err < 0)
701 return err;
702
703 /* make sure we tell the right values to user */
704 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
705 link_ksettings.base.link_mode_masks_nwords
706 = __ETHTOOL_LINK_MODE_MASK_NU32;
707
708 return store_link_ksettings_for_user(useraddr, &link_ksettings);
709 }
710
711 /* Update device ethtool_link_settings.
712 *
713 * Backward compatibility note: this function must fail when driver
714 * does not implement ethtool::set_link_ksettings, even if legacy
715 * ethtool_ops::set_settings is implemented. This tells new versions
716 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
717 * this driver, so that they can correctly update the ethtool_cmd
718 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
719 * implements ethtool_ops::get_settings anymore.
720 */
721 static int ethtool_set_link_ksettings(struct net_device *dev,
722 void __user *useraddr)
723 {
724 int err;
725 struct ethtool_link_ksettings link_ksettings;
726
727 ASSERT_RTNL();
728
729 if (!dev->ethtool_ops->set_link_ksettings)
730 return -EOPNOTSUPP;
731
732 /* make sure nbits field has expected value */
733 if (copy_from_user(&link_ksettings.base, useraddr,
734 sizeof(link_ksettings.base)))
735 return -EFAULT;
736
737 if (__ETHTOOL_LINK_MODE_MASK_NU32
738 != link_ksettings.base.link_mode_masks_nwords)
739 return -EINVAL;
740
741 /* copy the whole structure, now that we know it has expected
742 * format
743 */
744 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
745 if (err)
746 return err;
747
748 /* re-check nwords field, just in case */
749 if (__ETHTOOL_LINK_MODE_MASK_NU32
750 != link_ksettings.base.link_mode_masks_nwords)
751 return -EINVAL;
752
753 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
754 }
755
756 static void
757 warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
758 {
759 char name[sizeof(current->comm)];
760
761 pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
762 get_task_comm(name, current), details);
763 }
764
765 /* Query device for its ethtool_cmd settings.
766 *
767 * Backward compatibility note: for compatibility with legacy ethtool,
768 * this has to work with both drivers implementing get_link_ksettings
769 * API and drivers implementing get_settings API. When drivers
770 * implement get_link_ksettings and report higher link mode bits, a
771 * kernel warning is logged once (with name of 1st driver/device) to
772 * recommend user to upgrade ethtool, but the command is successful
773 * (only the lower link mode bits reported back to user).
774 */
775 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
776 {
777 struct ethtool_cmd cmd;
778
779 ASSERT_RTNL();
780
781 if (dev->ethtool_ops->get_link_ksettings) {
782 /* First, use link_ksettings API if it is supported */
783 int err;
784 struct ethtool_link_ksettings link_ksettings;
785
786 memset(&link_ksettings, 0, sizeof(link_ksettings));
787 err = dev->ethtool_ops->get_link_ksettings(dev,
788 &link_ksettings);
789 if (err < 0)
790 return err;
791 if (!convert_link_ksettings_to_legacy_settings(&cmd,
792 &link_ksettings))
793 warn_incomplete_ethtool_legacy_settings_conversion(
794 "link modes are only partially reported");
795
796 /* send a sensible cmd tag back to user */
797 cmd.cmd = ETHTOOL_GSET;
798 } else {
799 /* driver doesn't support %ethtool_link_ksettings
800 * API. revert to legacy %ethtool_cmd API, unless it's
801 * not supported either.
802 */
803 int err;
804
805 if (!dev->ethtool_ops->get_settings)
806 return -EOPNOTSUPP;
807
808 memset(&cmd, 0, sizeof(cmd));
809 cmd.cmd = ETHTOOL_GSET;
810 err = dev->ethtool_ops->get_settings(dev, &cmd);
811 if (err < 0)
812 return err;
813 }
814
815 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
816 return -EFAULT;
817
818 return 0;
819 }
820
821 /* Update device link settings with given ethtool_cmd.
822 *
823 * Backward compatibility note: for compatibility with legacy ethtool,
824 * this has to work with both drivers implementing set_link_ksettings
825 * API and drivers implementing set_settings API. When drivers
826 * implement set_link_ksettings and user's request updates deprecated
827 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
828 * warning is logged once (with name of 1st driver/device) to
829 * recommend user to upgrade ethtool, and the request is rejected.
830 */
831 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
832 {
833 struct ethtool_cmd cmd;
834
835 ASSERT_RTNL();
836
837 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
838 return -EFAULT;
839
840 /* first, try new %ethtool_link_ksettings API. */
841 if (dev->ethtool_ops->set_link_ksettings) {
842 struct ethtool_link_ksettings link_ksettings;
843
844 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
845 &cmd))
846 return -EINVAL;
847
848 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
849 link_ksettings.base.link_mode_masks_nwords
850 = __ETHTOOL_LINK_MODE_MASK_NU32;
851 return dev->ethtool_ops->set_link_ksettings(dev,
852 &link_ksettings);
853 }
854
855 /* legacy %ethtool_cmd API */
856
857 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
858 * disappears internally
859 */
860
861 if (!dev->ethtool_ops->set_settings)
862 return -EOPNOTSUPP;
863
864 return dev->ethtool_ops->set_settings(dev, &cmd);
865 }
866
867 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
868 void __user *useraddr)
869 {
870 struct ethtool_drvinfo info;
871 const struct ethtool_ops *ops = dev->ethtool_ops;
872
873 memset(&info, 0, sizeof(info));
874 info.cmd = ETHTOOL_GDRVINFO;
875 if (ops->get_drvinfo) {
876 ops->get_drvinfo(dev, &info);
877 } else if (dev->dev.parent && dev->dev.parent->driver) {
878 strlcpy(info.bus_info, dev_name(dev->dev.parent),
879 sizeof(info.bus_info));
880 strlcpy(info.driver, dev->dev.parent->driver->name,
881 sizeof(info.driver));
882 } else {
883 return -EOPNOTSUPP;
884 }
885
886 /*
887 * this method of obtaining string set info is deprecated;
888 * Use ETHTOOL_GSSET_INFO instead.
889 */
890 if (ops->get_sset_count) {
891 int rc;
892
893 rc = ops->get_sset_count(dev, ETH_SS_TEST);
894 if (rc >= 0)
895 info.testinfo_len = rc;
896 rc = ops->get_sset_count(dev, ETH_SS_STATS);
897 if (rc >= 0)
898 info.n_stats = rc;
899 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
900 if (rc >= 0)
901 info.n_priv_flags = rc;
902 }
903 if (ops->get_regs_len)
904 info.regdump_len = ops->get_regs_len(dev);
905 if (ops->get_eeprom_len)
906 info.eedump_len = ops->get_eeprom_len(dev);
907
908 if (copy_to_user(useraddr, &info, sizeof(info)))
909 return -EFAULT;
910 return 0;
911 }
912
913 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
914 void __user *useraddr)
915 {
916 struct ethtool_sset_info info;
917 u64 sset_mask;
918 int i, idx = 0, n_bits = 0, ret, rc;
919 u32 *info_buf = NULL;
920
921 if (copy_from_user(&info, useraddr, sizeof(info)))
922 return -EFAULT;
923
924 /* store copy of mask, because we zero struct later on */
925 sset_mask = info.sset_mask;
926 if (!sset_mask)
927 return 0;
928
929 /* calculate size of return buffer */
930 n_bits = hweight64(sset_mask);
931
932 memset(&info, 0, sizeof(info));
933 info.cmd = ETHTOOL_GSSET_INFO;
934
935 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
936 if (!info_buf)
937 return -ENOMEM;
938
939 /*
940 * fill return buffer based on input bitmask and successful
941 * get_sset_count return
942 */
943 for (i = 0; i < 64; i++) {
944 if (!(sset_mask & (1ULL << i)))
945 continue;
946
947 rc = __ethtool_get_sset_count(dev, i);
948 if (rc >= 0) {
949 info.sset_mask |= (1ULL << i);
950 info_buf[idx++] = rc;
951 }
952 }
953
954 ret = -EFAULT;
955 if (copy_to_user(useraddr, &info, sizeof(info)))
956 goto out;
957
958 useraddr += offsetof(struct ethtool_sset_info, data);
959 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
960 goto out;
961
962 ret = 0;
963
964 out:
965 kfree(info_buf);
966 return ret;
967 }
968
969 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
970 u32 cmd, void __user *useraddr)
971 {
972 struct ethtool_rxnfc info;
973 size_t info_size = sizeof(info);
974 int rc;
975
976 if (!dev->ethtool_ops->set_rxnfc)
977 return -EOPNOTSUPP;
978
979 /* struct ethtool_rxnfc was originally defined for
980 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
981 * members. User-space might still be using that
982 * definition. */
983 if (cmd == ETHTOOL_SRXFH)
984 info_size = (offsetof(struct ethtool_rxnfc, data) +
985 sizeof(info.data));
986
987 if (copy_from_user(&info, useraddr, info_size))
988 return -EFAULT;
989
990 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
991 if (rc)
992 return rc;
993
994 if (cmd == ETHTOOL_SRXCLSRLINS &&
995 copy_to_user(useraddr, &info, info_size))
996 return -EFAULT;
997
998 return 0;
999 }
1000
1001 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1002 u32 cmd, void __user *useraddr)
1003 {
1004 struct ethtool_rxnfc info;
1005 size_t info_size = sizeof(info);
1006 const struct ethtool_ops *ops = dev->ethtool_ops;
1007 int ret;
1008 void *rule_buf = NULL;
1009
1010 if (!ops->get_rxnfc)
1011 return -EOPNOTSUPP;
1012
1013 /* struct ethtool_rxnfc was originally defined for
1014 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1015 * members. User-space might still be using that
1016 * definition. */
1017 if (cmd == ETHTOOL_GRXFH)
1018 info_size = (offsetof(struct ethtool_rxnfc, data) +
1019 sizeof(info.data));
1020
1021 if (copy_from_user(&info, useraddr, info_size))
1022 return -EFAULT;
1023
1024 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1025 if (info.rule_cnt > 0) {
1026 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1027 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
1028 GFP_USER);
1029 if (!rule_buf)
1030 return -ENOMEM;
1031 }
1032 }
1033
1034 ret = ops->get_rxnfc(dev, &info, rule_buf);
1035 if (ret < 0)
1036 goto err_out;
1037
1038 ret = -EFAULT;
1039 if (copy_to_user(useraddr, &info, info_size))
1040 goto err_out;
1041
1042 if (rule_buf) {
1043 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1044 if (copy_to_user(useraddr, rule_buf,
1045 info.rule_cnt * sizeof(u32)))
1046 goto err_out;
1047 }
1048 ret = 0;
1049
1050 err_out:
1051 kfree(rule_buf);
1052
1053 return ret;
1054 }
1055
1056 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1057 struct ethtool_rxnfc *rx_rings,
1058 u32 size)
1059 {
1060 int i;
1061
1062 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1063 return -EFAULT;
1064
1065 /* Validate ring indices */
1066 for (i = 0; i < size; i++)
1067 if (indir[i] >= rx_rings->data)
1068 return -EINVAL;
1069
1070 return 0;
1071 }
1072
1073 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1074
1075 void netdev_rss_key_fill(void *buffer, size_t len)
1076 {
1077 BUG_ON(len > sizeof(netdev_rss_key));
1078 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1079 memcpy(buffer, netdev_rss_key, len);
1080 }
1081 EXPORT_SYMBOL(netdev_rss_key_fill);
1082
1083 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1084 {
1085 u32 dev_size, current_max = 0;
1086 u32 *indir;
1087 int ret;
1088
1089 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1090 !dev->ethtool_ops->get_rxfh)
1091 return -EOPNOTSUPP;
1092 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1093 if (dev_size == 0)
1094 return -EOPNOTSUPP;
1095
1096 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1097 if (!indir)
1098 return -ENOMEM;
1099
1100 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1101 if (ret)
1102 goto out;
1103
1104 while (dev_size--)
1105 current_max = max(current_max, indir[dev_size]);
1106
1107 *max = current_max;
1108
1109 out:
1110 kfree(indir);
1111 return ret;
1112 }
1113
1114 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1115 void __user *useraddr)
1116 {
1117 u32 user_size, dev_size;
1118 u32 *indir;
1119 int ret;
1120
1121 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1122 !dev->ethtool_ops->get_rxfh)
1123 return -EOPNOTSUPP;
1124 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1125 if (dev_size == 0)
1126 return -EOPNOTSUPP;
1127
1128 if (copy_from_user(&user_size,
1129 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1130 sizeof(user_size)))
1131 return -EFAULT;
1132
1133 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1134 &dev_size, sizeof(dev_size)))
1135 return -EFAULT;
1136
1137 /* If the user buffer size is 0, this is just a query for the
1138 * device table size. Otherwise, if it's smaller than the
1139 * device table size it's an error.
1140 */
1141 if (user_size < dev_size)
1142 return user_size == 0 ? 0 : -EINVAL;
1143
1144 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1145 if (!indir)
1146 return -ENOMEM;
1147
1148 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1149 if (ret)
1150 goto out;
1151
1152 if (copy_to_user(useraddr +
1153 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1154 indir, dev_size * sizeof(indir[0])))
1155 ret = -EFAULT;
1156
1157 out:
1158 kfree(indir);
1159 return ret;
1160 }
1161
1162 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1163 void __user *useraddr)
1164 {
1165 struct ethtool_rxnfc rx_rings;
1166 u32 user_size, dev_size, i;
1167 u32 *indir;
1168 const struct ethtool_ops *ops = dev->ethtool_ops;
1169 int ret;
1170 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1171
1172 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1173 !ops->get_rxnfc)
1174 return -EOPNOTSUPP;
1175
1176 dev_size = ops->get_rxfh_indir_size(dev);
1177 if (dev_size == 0)
1178 return -EOPNOTSUPP;
1179
1180 if (copy_from_user(&user_size,
1181 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1182 sizeof(user_size)))
1183 return -EFAULT;
1184
1185 if (user_size != 0 && user_size != dev_size)
1186 return -EINVAL;
1187
1188 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1189 if (!indir)
1190 return -ENOMEM;
1191
1192 rx_rings.cmd = ETHTOOL_GRXRINGS;
1193 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1194 if (ret)
1195 goto out;
1196
1197 if (user_size == 0) {
1198 for (i = 0; i < dev_size; i++)
1199 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1200 } else {
1201 ret = ethtool_copy_validate_indir(indir,
1202 useraddr + ringidx_offset,
1203 &rx_rings,
1204 dev_size);
1205 if (ret)
1206 goto out;
1207 }
1208
1209 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1210 if (ret)
1211 goto out;
1212
1213 /* indicate whether rxfh was set to default */
1214 if (user_size == 0)
1215 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1216 else
1217 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1218
1219 out:
1220 kfree(indir);
1221 return ret;
1222 }
1223
1224 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1225 void __user *useraddr)
1226 {
1227 int ret;
1228 const struct ethtool_ops *ops = dev->ethtool_ops;
1229 u32 user_indir_size, user_key_size;
1230 u32 dev_indir_size = 0, dev_key_size = 0;
1231 struct ethtool_rxfh rxfh;
1232 u32 total_size;
1233 u32 indir_bytes;
1234 u32 *indir = NULL;
1235 u8 dev_hfunc = 0;
1236 u8 *hkey = NULL;
1237 u8 *rss_config;
1238
1239 if (!ops->get_rxfh)
1240 return -EOPNOTSUPP;
1241
1242 if (ops->get_rxfh_indir_size)
1243 dev_indir_size = ops->get_rxfh_indir_size(dev);
1244 if (ops->get_rxfh_key_size)
1245 dev_key_size = ops->get_rxfh_key_size(dev);
1246
1247 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1248 return -EFAULT;
1249 user_indir_size = rxfh.indir_size;
1250 user_key_size = rxfh.key_size;
1251
1252 /* Check that reserved fields are 0 for now */
1253 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1254 rxfh.rsvd8[2] || rxfh.rsvd32)
1255 return -EINVAL;
1256
1257 rxfh.indir_size = dev_indir_size;
1258 rxfh.key_size = dev_key_size;
1259 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1260 return -EFAULT;
1261
1262 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1263 (user_key_size && (user_key_size != dev_key_size)))
1264 return -EINVAL;
1265
1266 indir_bytes = user_indir_size * sizeof(indir[0]);
1267 total_size = indir_bytes + user_key_size;
1268 rss_config = kzalloc(total_size, GFP_USER);
1269 if (!rss_config)
1270 return -ENOMEM;
1271
1272 if (user_indir_size)
1273 indir = (u32 *)rss_config;
1274
1275 if (user_key_size)
1276 hkey = rss_config + indir_bytes;
1277
1278 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1279 if (ret)
1280 goto out;
1281
1282 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1283 &dev_hfunc, sizeof(rxfh.hfunc))) {
1284 ret = -EFAULT;
1285 } else if (copy_to_user(useraddr +
1286 offsetof(struct ethtool_rxfh, rss_config[0]),
1287 rss_config, total_size)) {
1288 ret = -EFAULT;
1289 }
1290 out:
1291 kfree(rss_config);
1292
1293 return ret;
1294 }
1295
1296 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1297 void __user *useraddr)
1298 {
1299 int ret;
1300 const struct ethtool_ops *ops = dev->ethtool_ops;
1301 struct ethtool_rxnfc rx_rings;
1302 struct ethtool_rxfh rxfh;
1303 u32 dev_indir_size = 0, dev_key_size = 0, i;
1304 u32 *indir = NULL, indir_bytes = 0;
1305 u8 *hkey = NULL;
1306 u8 *rss_config;
1307 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1308
1309 if (!ops->get_rxnfc || !ops->set_rxfh)
1310 return -EOPNOTSUPP;
1311
1312 if (ops->get_rxfh_indir_size)
1313 dev_indir_size = ops->get_rxfh_indir_size(dev);
1314 if (ops->get_rxfh_key_size)
1315 dev_key_size = ops->get_rxfh_key_size(dev);
1316
1317 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1318 return -EFAULT;
1319
1320 /* Check that reserved fields are 0 for now */
1321 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1322 rxfh.rsvd8[2] || rxfh.rsvd32)
1323 return -EINVAL;
1324
1325 /* If either indir, hash key or function is valid, proceed further.
1326 * Must request at least one change: indir size, hash key or function.
1327 */
1328 if ((rxfh.indir_size &&
1329 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1330 rxfh.indir_size != dev_indir_size) ||
1331 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1332 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1333 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1334 return -EINVAL;
1335
1336 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1337 indir_bytes = dev_indir_size * sizeof(indir[0]);
1338
1339 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1340 if (!rss_config)
1341 return -ENOMEM;
1342
1343 rx_rings.cmd = ETHTOOL_GRXRINGS;
1344 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1345 if (ret)
1346 goto out;
1347
1348 /* rxfh.indir_size == 0 means reset the indir table to default.
1349 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1350 */
1351 if (rxfh.indir_size &&
1352 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1353 indir = (u32 *)rss_config;
1354 ret = ethtool_copy_validate_indir(indir,
1355 useraddr + rss_cfg_offset,
1356 &rx_rings,
1357 rxfh.indir_size);
1358 if (ret)
1359 goto out;
1360 } else if (rxfh.indir_size == 0) {
1361 indir = (u32 *)rss_config;
1362 for (i = 0; i < dev_indir_size; i++)
1363 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1364 }
1365
1366 if (rxfh.key_size) {
1367 hkey = rss_config + indir_bytes;
1368 if (copy_from_user(hkey,
1369 useraddr + rss_cfg_offset + indir_bytes,
1370 rxfh.key_size)) {
1371 ret = -EFAULT;
1372 goto out;
1373 }
1374 }
1375
1376 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1377 if (ret)
1378 goto out;
1379
1380 /* indicate whether rxfh was set to default */
1381 if (rxfh.indir_size == 0)
1382 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1383 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1384 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1385
1386 out:
1387 kfree(rss_config);
1388 return ret;
1389 }
1390
1391 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1392 {
1393 struct ethtool_regs regs;
1394 const struct ethtool_ops *ops = dev->ethtool_ops;
1395 void *regbuf;
1396 int reglen, ret;
1397
1398 if (!ops->get_regs || !ops->get_regs_len)
1399 return -EOPNOTSUPP;
1400
1401 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1402 return -EFAULT;
1403
1404 reglen = ops->get_regs_len(dev);
1405 if (regs.len > reglen)
1406 regs.len = reglen;
1407
1408 regbuf = NULL;
1409 if (reglen) {
1410 regbuf = vzalloc(reglen);
1411 if (!regbuf)
1412 return -ENOMEM;
1413 }
1414
1415 ops->get_regs(dev, &regs, regbuf);
1416
1417 ret = -EFAULT;
1418 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1419 goto out;
1420 useraddr += offsetof(struct ethtool_regs, data);
1421 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1422 goto out;
1423 ret = 0;
1424
1425 out:
1426 vfree(regbuf);
1427 return ret;
1428 }
1429
1430 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1431 {
1432 struct ethtool_value reset;
1433 int ret;
1434
1435 if (!dev->ethtool_ops->reset)
1436 return -EOPNOTSUPP;
1437
1438 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1439 return -EFAULT;
1440
1441 ret = dev->ethtool_ops->reset(dev, &reset.data);
1442 if (ret)
1443 return ret;
1444
1445 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1446 return -EFAULT;
1447 return 0;
1448 }
1449
1450 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1451 {
1452 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1453
1454 if (!dev->ethtool_ops->get_wol)
1455 return -EOPNOTSUPP;
1456
1457 dev->ethtool_ops->get_wol(dev, &wol);
1458
1459 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1460 return -EFAULT;
1461 return 0;
1462 }
1463
1464 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1465 {
1466 struct ethtool_wolinfo wol;
1467
1468 if (!dev->ethtool_ops->set_wol)
1469 return -EOPNOTSUPP;
1470
1471 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1472 return -EFAULT;
1473
1474 return dev->ethtool_ops->set_wol(dev, &wol);
1475 }
1476
1477 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1478 {
1479 struct ethtool_eee edata;
1480 int rc;
1481
1482 if (!dev->ethtool_ops->get_eee)
1483 return -EOPNOTSUPP;
1484
1485 memset(&edata, 0, sizeof(struct ethtool_eee));
1486 edata.cmd = ETHTOOL_GEEE;
1487 rc = dev->ethtool_ops->get_eee(dev, &edata);
1488
1489 if (rc)
1490 return rc;
1491
1492 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1493 return -EFAULT;
1494
1495 return 0;
1496 }
1497
1498 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1499 {
1500 struct ethtool_eee edata;
1501
1502 if (!dev->ethtool_ops->set_eee)
1503 return -EOPNOTSUPP;
1504
1505 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1506 return -EFAULT;
1507
1508 return dev->ethtool_ops->set_eee(dev, &edata);
1509 }
1510
1511 static int ethtool_nway_reset(struct net_device *dev)
1512 {
1513 if (!dev->ethtool_ops->nway_reset)
1514 return -EOPNOTSUPP;
1515
1516 return dev->ethtool_ops->nway_reset(dev);
1517 }
1518
1519 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1520 {
1521 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1522
1523 if (!dev->ethtool_ops->get_link)
1524 return -EOPNOTSUPP;
1525
1526 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1527
1528 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1529 return -EFAULT;
1530 return 0;
1531 }
1532
1533 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1534 int (*getter)(struct net_device *,
1535 struct ethtool_eeprom *, u8 *),
1536 u32 total_len)
1537 {
1538 struct ethtool_eeprom eeprom;
1539 void __user *userbuf = useraddr + sizeof(eeprom);
1540 u32 bytes_remaining;
1541 u8 *data;
1542 int ret = 0;
1543
1544 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1545 return -EFAULT;
1546
1547 /* Check for wrap and zero */
1548 if (eeprom.offset + eeprom.len <= eeprom.offset)
1549 return -EINVAL;
1550
1551 /* Check for exceeding total eeprom len */
1552 if (eeprom.offset + eeprom.len > total_len)
1553 return -EINVAL;
1554
1555 data = kmalloc(PAGE_SIZE, GFP_USER);
1556 if (!data)
1557 return -ENOMEM;
1558
1559 bytes_remaining = eeprom.len;
1560 while (bytes_remaining > 0) {
1561 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1562
1563 ret = getter(dev, &eeprom, data);
1564 if (ret)
1565 break;
1566 if (copy_to_user(userbuf, data, eeprom.len)) {
1567 ret = -EFAULT;
1568 break;
1569 }
1570 userbuf += eeprom.len;
1571 eeprom.offset += eeprom.len;
1572 bytes_remaining -= eeprom.len;
1573 }
1574
1575 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1576 eeprom.offset -= eeprom.len;
1577 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1578 ret = -EFAULT;
1579
1580 kfree(data);
1581 return ret;
1582 }
1583
1584 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1585 {
1586 const struct ethtool_ops *ops = dev->ethtool_ops;
1587
1588 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1589 !ops->get_eeprom_len(dev))
1590 return -EOPNOTSUPP;
1591
1592 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1593 ops->get_eeprom_len(dev));
1594 }
1595
1596 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1597 {
1598 struct ethtool_eeprom eeprom;
1599 const struct ethtool_ops *ops = dev->ethtool_ops;
1600 void __user *userbuf = useraddr + sizeof(eeprom);
1601 u32 bytes_remaining;
1602 u8 *data;
1603 int ret = 0;
1604
1605 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1606 !ops->get_eeprom_len(dev))
1607 return -EOPNOTSUPP;
1608
1609 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1610 return -EFAULT;
1611
1612 /* Check for wrap and zero */
1613 if (eeprom.offset + eeprom.len <= eeprom.offset)
1614 return -EINVAL;
1615
1616 /* Check for exceeding total eeprom len */
1617 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1618 return -EINVAL;
1619
1620 data = kmalloc(PAGE_SIZE, GFP_USER);
1621 if (!data)
1622 return -ENOMEM;
1623
1624 bytes_remaining = eeprom.len;
1625 while (bytes_remaining > 0) {
1626 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1627
1628 if (copy_from_user(data, userbuf, eeprom.len)) {
1629 ret = -EFAULT;
1630 break;
1631 }
1632 ret = ops->set_eeprom(dev, &eeprom, data);
1633 if (ret)
1634 break;
1635 userbuf += eeprom.len;
1636 eeprom.offset += eeprom.len;
1637 bytes_remaining -= eeprom.len;
1638 }
1639
1640 kfree(data);
1641 return ret;
1642 }
1643
1644 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1645 void __user *useraddr)
1646 {
1647 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1648
1649 if (!dev->ethtool_ops->get_coalesce)
1650 return -EOPNOTSUPP;
1651
1652 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1653
1654 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1655 return -EFAULT;
1656 return 0;
1657 }
1658
1659 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1660 void __user *useraddr)
1661 {
1662 struct ethtool_coalesce coalesce;
1663
1664 if (!dev->ethtool_ops->set_coalesce)
1665 return -EOPNOTSUPP;
1666
1667 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1668 return -EFAULT;
1669
1670 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1671 }
1672
1673 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1674 {
1675 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1676
1677 if (!dev->ethtool_ops->get_ringparam)
1678 return -EOPNOTSUPP;
1679
1680 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1681
1682 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1683 return -EFAULT;
1684 return 0;
1685 }
1686
1687 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1688 {
1689 struct ethtool_ringparam ringparam;
1690
1691 if (!dev->ethtool_ops->set_ringparam)
1692 return -EOPNOTSUPP;
1693
1694 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1695 return -EFAULT;
1696
1697 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1698 }
1699
1700 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1701 void __user *useraddr)
1702 {
1703 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1704
1705 if (!dev->ethtool_ops->get_channels)
1706 return -EOPNOTSUPP;
1707
1708 dev->ethtool_ops->get_channels(dev, &channels);
1709
1710 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1711 return -EFAULT;
1712 return 0;
1713 }
1714
1715 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1716 void __user *useraddr)
1717 {
1718 struct ethtool_channels channels, max = { .cmd = ETHTOOL_GCHANNELS };
1719 u32 max_rx_in_use = 0;
1720
1721 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1722 return -EOPNOTSUPP;
1723
1724 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1725 return -EFAULT;
1726
1727 dev->ethtool_ops->get_channels(dev, &max);
1728
1729 /* ensure new counts are within the maximums */
1730 if ((channels.rx_count > max.max_rx) ||
1731 (channels.tx_count > max.max_tx) ||
1732 (channels.combined_count > max.max_combined) ||
1733 (channels.other_count > max.max_other))
1734 return -EINVAL;
1735
1736 /* ensure the new Rx count fits within the configured Rx flow
1737 * indirection table settings */
1738 if (netif_is_rxfh_configured(dev) &&
1739 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1740 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1741 return -EINVAL;
1742
1743 return dev->ethtool_ops->set_channels(dev, &channels);
1744 }
1745
1746 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1747 {
1748 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1749
1750 if (!dev->ethtool_ops->get_pauseparam)
1751 return -EOPNOTSUPP;
1752
1753 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1754
1755 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1756 return -EFAULT;
1757 return 0;
1758 }
1759
1760 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1761 {
1762 struct ethtool_pauseparam pauseparam;
1763
1764 if (!dev->ethtool_ops->set_pauseparam)
1765 return -EOPNOTSUPP;
1766
1767 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1768 return -EFAULT;
1769
1770 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1771 }
1772
1773 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1774 {
1775 struct ethtool_test test;
1776 const struct ethtool_ops *ops = dev->ethtool_ops;
1777 u64 *data;
1778 int ret, test_len;
1779
1780 if (!ops->self_test || !ops->get_sset_count)
1781 return -EOPNOTSUPP;
1782
1783 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1784 if (test_len < 0)
1785 return test_len;
1786 WARN_ON(test_len == 0);
1787
1788 if (copy_from_user(&test, useraddr, sizeof(test)))
1789 return -EFAULT;
1790
1791 test.len = test_len;
1792 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1793 if (!data)
1794 return -ENOMEM;
1795
1796 ops->self_test(dev, &test, data);
1797
1798 ret = -EFAULT;
1799 if (copy_to_user(useraddr, &test, sizeof(test)))
1800 goto out;
1801 useraddr += sizeof(test);
1802 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1803 goto out;
1804 ret = 0;
1805
1806 out:
1807 kfree(data);
1808 return ret;
1809 }
1810
1811 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1812 {
1813 struct ethtool_gstrings gstrings;
1814 u8 *data;
1815 int ret;
1816
1817 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1818 return -EFAULT;
1819
1820 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1821 if (ret < 0)
1822 return ret;
1823 if (ret > S32_MAX / ETH_GSTRING_LEN)
1824 return -ENOMEM;
1825 WARN_ON_ONCE(!ret);
1826
1827 gstrings.len = ret;
1828 data = vzalloc(gstrings.len * ETH_GSTRING_LEN);
1829 if (gstrings.len && !data)
1830 return -ENOMEM;
1831
1832 __ethtool_get_strings(dev, gstrings.string_set, data);
1833
1834 ret = -EFAULT;
1835 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1836 goto out;
1837 useraddr += sizeof(gstrings);
1838 if (gstrings.len &&
1839 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1840 goto out;
1841 ret = 0;
1842
1843 out:
1844 vfree(data);
1845 return ret;
1846 }
1847
1848 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1849 {
1850 struct ethtool_value id;
1851 static bool busy;
1852 const struct ethtool_ops *ops = dev->ethtool_ops;
1853 int rc;
1854
1855 if (!ops->set_phys_id)
1856 return -EOPNOTSUPP;
1857
1858 if (busy)
1859 return -EBUSY;
1860
1861 if (copy_from_user(&id, useraddr, sizeof(id)))
1862 return -EFAULT;
1863
1864 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1865 if (rc < 0)
1866 return rc;
1867
1868 /* Drop the RTNL lock while waiting, but prevent reentry or
1869 * removal of the device.
1870 */
1871 busy = true;
1872 dev_hold(dev);
1873 rtnl_unlock();
1874
1875 if (rc == 0) {
1876 /* Driver will handle this itself */
1877 schedule_timeout_interruptible(
1878 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1879 } else {
1880 /* Driver expects to be called at twice the frequency in rc */
1881 int n = rc * 2, i, interval = HZ / n;
1882
1883 /* Count down seconds */
1884 do {
1885 /* Count down iterations per second */
1886 i = n;
1887 do {
1888 rtnl_lock();
1889 rc = ops->set_phys_id(dev,
1890 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1891 rtnl_unlock();
1892 if (rc)
1893 break;
1894 schedule_timeout_interruptible(interval);
1895 } while (!signal_pending(current) && --i != 0);
1896 } while (!signal_pending(current) &&
1897 (id.data == 0 || --id.data != 0));
1898 }
1899
1900 rtnl_lock();
1901 dev_put(dev);
1902 busy = false;
1903
1904 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1905 return rc;
1906 }
1907
1908 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1909 {
1910 struct ethtool_stats stats;
1911 const struct ethtool_ops *ops = dev->ethtool_ops;
1912 u64 *data;
1913 int ret, n_stats;
1914
1915 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1916 return -EOPNOTSUPP;
1917
1918 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1919 if (n_stats < 0)
1920 return n_stats;
1921 if (n_stats > S32_MAX / sizeof(u64))
1922 return -ENOMEM;
1923 WARN_ON_ONCE(!n_stats);
1924 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1925 return -EFAULT;
1926
1927 stats.n_stats = n_stats;
1928 data = vzalloc(n_stats * sizeof(u64));
1929 if (n_stats && !data)
1930 return -ENOMEM;
1931
1932 ops->get_ethtool_stats(dev, &stats, data);
1933
1934 ret = -EFAULT;
1935 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1936 goto out;
1937 useraddr += sizeof(stats);
1938 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1939 goto out;
1940 ret = 0;
1941
1942 out:
1943 vfree(data);
1944 return ret;
1945 }
1946
1947 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1948 {
1949 struct ethtool_stats stats;
1950 struct phy_device *phydev = dev->phydev;
1951 u64 *data;
1952 int ret, n_stats;
1953
1954 if (!phydev)
1955 return -EOPNOTSUPP;
1956
1957 n_stats = phy_get_sset_count(phydev);
1958 if (n_stats < 0)
1959 return n_stats;
1960 if (n_stats > S32_MAX / sizeof(u64))
1961 return -ENOMEM;
1962 WARN_ON_ONCE(!n_stats);
1963
1964 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1965 return -EFAULT;
1966
1967 stats.n_stats = n_stats;
1968 data = vzalloc(n_stats * sizeof(u64));
1969 if (n_stats && !data)
1970 return -ENOMEM;
1971
1972 mutex_lock(&phydev->lock);
1973 phydev->drv->get_stats(phydev, &stats, data);
1974 mutex_unlock(&phydev->lock);
1975
1976 ret = -EFAULT;
1977 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1978 goto out;
1979 useraddr += sizeof(stats);
1980 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1981 goto out;
1982 ret = 0;
1983
1984 out:
1985 vfree(data);
1986 return ret;
1987 }
1988
1989 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1990 {
1991 struct ethtool_perm_addr epaddr;
1992
1993 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1994 return -EFAULT;
1995
1996 if (epaddr.size < dev->addr_len)
1997 return -ETOOSMALL;
1998 epaddr.size = dev->addr_len;
1999
2000 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2001 return -EFAULT;
2002 useraddr += sizeof(epaddr);
2003 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2004 return -EFAULT;
2005 return 0;
2006 }
2007
2008 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2009 u32 cmd, u32 (*actor)(struct net_device *))
2010 {
2011 struct ethtool_value edata = { .cmd = cmd };
2012
2013 if (!actor)
2014 return -EOPNOTSUPP;
2015
2016 edata.data = actor(dev);
2017
2018 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2019 return -EFAULT;
2020 return 0;
2021 }
2022
2023 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2024 void (*actor)(struct net_device *, u32))
2025 {
2026 struct ethtool_value edata;
2027
2028 if (!actor)
2029 return -EOPNOTSUPP;
2030
2031 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2032 return -EFAULT;
2033
2034 actor(dev, edata.data);
2035 return 0;
2036 }
2037
2038 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2039 int (*actor)(struct net_device *, u32))
2040 {
2041 struct ethtool_value edata;
2042
2043 if (!actor)
2044 return -EOPNOTSUPP;
2045
2046 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2047 return -EFAULT;
2048
2049 return actor(dev, edata.data);
2050 }
2051
2052 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2053 char __user *useraddr)
2054 {
2055 struct ethtool_flash efl;
2056
2057 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2058 return -EFAULT;
2059
2060 if (!dev->ethtool_ops->flash_device)
2061 return -EOPNOTSUPP;
2062
2063 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2064
2065 return dev->ethtool_ops->flash_device(dev, &efl);
2066 }
2067
2068 static int ethtool_set_dump(struct net_device *dev,
2069 void __user *useraddr)
2070 {
2071 struct ethtool_dump dump;
2072
2073 if (!dev->ethtool_ops->set_dump)
2074 return -EOPNOTSUPP;
2075
2076 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2077 return -EFAULT;
2078
2079 return dev->ethtool_ops->set_dump(dev, &dump);
2080 }
2081
2082 static int ethtool_get_dump_flag(struct net_device *dev,
2083 void __user *useraddr)
2084 {
2085 int ret;
2086 struct ethtool_dump dump;
2087 const struct ethtool_ops *ops = dev->ethtool_ops;
2088
2089 if (!ops->get_dump_flag)
2090 return -EOPNOTSUPP;
2091
2092 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2093 return -EFAULT;
2094
2095 ret = ops->get_dump_flag(dev, &dump);
2096 if (ret)
2097 return ret;
2098
2099 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2100 return -EFAULT;
2101 return 0;
2102 }
2103
2104 static int ethtool_get_dump_data(struct net_device *dev,
2105 void __user *useraddr)
2106 {
2107 int ret;
2108 __u32 len;
2109 struct ethtool_dump dump, tmp;
2110 const struct ethtool_ops *ops = dev->ethtool_ops;
2111 void *data = NULL;
2112
2113 if (!ops->get_dump_data || !ops->get_dump_flag)
2114 return -EOPNOTSUPP;
2115
2116 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2117 return -EFAULT;
2118
2119 memset(&tmp, 0, sizeof(tmp));
2120 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2121 ret = ops->get_dump_flag(dev, &tmp);
2122 if (ret)
2123 return ret;
2124
2125 len = min(tmp.len, dump.len);
2126 if (!len)
2127 return -EFAULT;
2128
2129 /* Don't ever let the driver think there's more space available
2130 * than it requested with .get_dump_flag().
2131 */
2132 dump.len = len;
2133
2134 /* Always allocate enough space to hold the whole thing so that the
2135 * driver does not need to check the length and bother with partial
2136 * dumping.
2137 */
2138 data = vzalloc(tmp.len);
2139 if (!data)
2140 return -ENOMEM;
2141 ret = ops->get_dump_data(dev, &dump, data);
2142 if (ret)
2143 goto out;
2144
2145 /* There are two sane possibilities:
2146 * 1. The driver's .get_dump_data() does not touch dump.len.
2147 * 2. Or it may set dump.len to how much it really writes, which
2148 * should be tmp.len (or len if it can do a partial dump).
2149 * In any case respond to userspace with the actual length of data
2150 * it's receiving.
2151 */
2152 WARN_ON(dump.len != len && dump.len != tmp.len);
2153 dump.len = len;
2154
2155 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2156 ret = -EFAULT;
2157 goto out;
2158 }
2159 useraddr += offsetof(struct ethtool_dump, data);
2160 if (copy_to_user(useraddr, data, len))
2161 ret = -EFAULT;
2162 out:
2163 vfree(data);
2164 return ret;
2165 }
2166
2167 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2168 {
2169 int err = 0;
2170 struct ethtool_ts_info info;
2171 const struct ethtool_ops *ops = dev->ethtool_ops;
2172 struct phy_device *phydev = dev->phydev;
2173
2174 memset(&info, 0, sizeof(info));
2175 info.cmd = ETHTOOL_GET_TS_INFO;
2176
2177 if (phydev && phydev->drv && phydev->drv->ts_info) {
2178 err = phydev->drv->ts_info(phydev, &info);
2179 } else if (ops->get_ts_info) {
2180 err = ops->get_ts_info(dev, &info);
2181 } else {
2182 info.so_timestamping =
2183 SOF_TIMESTAMPING_RX_SOFTWARE |
2184 SOF_TIMESTAMPING_SOFTWARE;
2185 info.phc_index = -1;
2186 }
2187
2188 if (err)
2189 return err;
2190
2191 if (copy_to_user(useraddr, &info, sizeof(info)))
2192 err = -EFAULT;
2193
2194 return err;
2195 }
2196
2197 static int __ethtool_get_module_info(struct net_device *dev,
2198 struct ethtool_modinfo *modinfo)
2199 {
2200 const struct ethtool_ops *ops = dev->ethtool_ops;
2201 struct phy_device *phydev = dev->phydev;
2202
2203 if (phydev && phydev->drv && phydev->drv->module_info)
2204 return phydev->drv->module_info(phydev, modinfo);
2205
2206 if (ops->get_module_info)
2207 return ops->get_module_info(dev, modinfo);
2208
2209 return -EOPNOTSUPP;
2210 }
2211
2212 static int ethtool_get_module_info(struct net_device *dev,
2213 void __user *useraddr)
2214 {
2215 int ret;
2216 struct ethtool_modinfo modinfo;
2217
2218 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2219 return -EFAULT;
2220
2221 ret = __ethtool_get_module_info(dev, &modinfo);
2222 if (ret)
2223 return ret;
2224
2225 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2226 return -EFAULT;
2227
2228 return 0;
2229 }
2230
2231 static int __ethtool_get_module_eeprom(struct net_device *dev,
2232 struct ethtool_eeprom *ee, u8 *data)
2233 {
2234 const struct ethtool_ops *ops = dev->ethtool_ops;
2235 struct phy_device *phydev = dev->phydev;
2236
2237 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2238 return phydev->drv->module_eeprom(phydev, ee, data);
2239
2240 if (ops->get_module_eeprom)
2241 return ops->get_module_eeprom(dev, ee, data);
2242
2243 return -EOPNOTSUPP;
2244 }
2245
2246 static int ethtool_get_module_eeprom(struct net_device *dev,
2247 void __user *useraddr)
2248 {
2249 int ret;
2250 struct ethtool_modinfo modinfo;
2251
2252 ret = __ethtool_get_module_info(dev, &modinfo);
2253 if (ret)
2254 return ret;
2255
2256 return ethtool_get_any_eeprom(dev, useraddr,
2257 __ethtool_get_module_eeprom,
2258 modinfo.eeprom_len);
2259 }
2260
2261 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2262 {
2263 switch (tuna->id) {
2264 case ETHTOOL_RX_COPYBREAK:
2265 case ETHTOOL_TX_COPYBREAK:
2266 if (tuna->len != sizeof(u32) ||
2267 tuna->type_id != ETHTOOL_TUNABLE_U32)
2268 return -EINVAL;
2269 break;
2270 default:
2271 return -EINVAL;
2272 }
2273
2274 return 0;
2275 }
2276
2277 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2278 {
2279 int ret;
2280 struct ethtool_tunable tuna;
2281 const struct ethtool_ops *ops = dev->ethtool_ops;
2282 void *data;
2283
2284 if (!ops->get_tunable)
2285 return -EOPNOTSUPP;
2286 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2287 return -EFAULT;
2288 ret = ethtool_tunable_valid(&tuna);
2289 if (ret)
2290 return ret;
2291 data = kmalloc(tuna.len, GFP_USER);
2292 if (!data)
2293 return -ENOMEM;
2294 ret = ops->get_tunable(dev, &tuna, data);
2295 if (ret)
2296 goto out;
2297 useraddr += sizeof(tuna);
2298 ret = -EFAULT;
2299 if (copy_to_user(useraddr, data, tuna.len))
2300 goto out;
2301 ret = 0;
2302
2303 out:
2304 kfree(data);
2305 return ret;
2306 }
2307
2308 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2309 {
2310 int ret;
2311 struct ethtool_tunable tuna;
2312 const struct ethtool_ops *ops = dev->ethtool_ops;
2313 void *data;
2314
2315 if (!ops->set_tunable)
2316 return -EOPNOTSUPP;
2317 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2318 return -EFAULT;
2319 ret = ethtool_tunable_valid(&tuna);
2320 if (ret)
2321 return ret;
2322 useraddr += sizeof(tuna);
2323 data = memdup_user(useraddr, tuna.len);
2324 if (IS_ERR(data))
2325 return PTR_ERR(data);
2326 ret = ops->set_tunable(dev, &tuna, data);
2327
2328 kfree(data);
2329 return ret;
2330 }
2331
2332 static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2333 void __user *useraddr,
2334 struct ethtool_per_queue_op *per_queue_opt)
2335 {
2336 u32 bit;
2337 int ret;
2338 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2339
2340 if (!dev->ethtool_ops->get_per_queue_coalesce)
2341 return -EOPNOTSUPP;
2342
2343 useraddr += sizeof(*per_queue_opt);
2344
2345 bitmap_from_u32array(queue_mask,
2346 MAX_NUM_QUEUE,
2347 per_queue_opt->queue_mask,
2348 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2349
2350 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2351 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2352
2353 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2354 if (ret != 0)
2355 return ret;
2356 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2357 return -EFAULT;
2358 useraddr += sizeof(coalesce);
2359 }
2360
2361 return 0;
2362 }
2363
2364 static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2365 void __user *useraddr,
2366 struct ethtool_per_queue_op *per_queue_opt)
2367 {
2368 u32 bit;
2369 int i, ret = 0;
2370 int n_queue;
2371 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2372 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2373
2374 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2375 (!dev->ethtool_ops->get_per_queue_coalesce))
2376 return -EOPNOTSUPP;
2377
2378 useraddr += sizeof(*per_queue_opt);
2379
2380 bitmap_from_u32array(queue_mask,
2381 MAX_NUM_QUEUE,
2382 per_queue_opt->queue_mask,
2383 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2384 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2385 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2386 if (!backup)
2387 return -ENOMEM;
2388
2389 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2390 struct ethtool_coalesce coalesce;
2391
2392 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2393 if (ret != 0)
2394 goto roll_back;
2395
2396 tmp++;
2397
2398 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2399 ret = -EFAULT;
2400 goto roll_back;
2401 }
2402
2403 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2404 if (ret != 0)
2405 goto roll_back;
2406
2407 useraddr += sizeof(coalesce);
2408 }
2409
2410 roll_back:
2411 if (ret != 0) {
2412 tmp = backup;
2413 for_each_set_bit(i, queue_mask, bit) {
2414 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2415 tmp++;
2416 }
2417 }
2418 kfree(backup);
2419
2420 return ret;
2421 }
2422
2423 static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2424 {
2425 struct ethtool_per_queue_op per_queue_opt;
2426
2427 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2428 return -EFAULT;
2429
2430 switch (per_queue_opt.sub_command) {
2431 case ETHTOOL_GCOALESCE:
2432 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2433 case ETHTOOL_SCOALESCE:
2434 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2435 default:
2436 return -EOPNOTSUPP;
2437 };
2438 }
2439
2440 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2441 {
2442 switch (tuna->id) {
2443 case ETHTOOL_PHY_DOWNSHIFT:
2444 if (tuna->len != sizeof(u8) ||
2445 tuna->type_id != ETHTOOL_TUNABLE_U8)
2446 return -EINVAL;
2447 break;
2448 default:
2449 return -EINVAL;
2450 }
2451
2452 return 0;
2453 }
2454
2455 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2456 {
2457 int ret;
2458 struct ethtool_tunable tuna;
2459 struct phy_device *phydev = dev->phydev;
2460 void *data;
2461
2462 if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2463 return -EOPNOTSUPP;
2464
2465 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2466 return -EFAULT;
2467 ret = ethtool_phy_tunable_valid(&tuna);
2468 if (ret)
2469 return ret;
2470 data = kmalloc(tuna.len, GFP_USER);
2471 if (!data)
2472 return -ENOMEM;
2473 mutex_lock(&phydev->lock);
2474 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2475 mutex_unlock(&phydev->lock);
2476 if (ret)
2477 goto out;
2478 useraddr += sizeof(tuna);
2479 ret = -EFAULT;
2480 if (copy_to_user(useraddr, data, tuna.len))
2481 goto out;
2482 ret = 0;
2483
2484 out:
2485 kfree(data);
2486 return ret;
2487 }
2488
2489 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2490 {
2491 int ret;
2492 struct ethtool_tunable tuna;
2493 struct phy_device *phydev = dev->phydev;
2494 void *data;
2495
2496 if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2497 return -EOPNOTSUPP;
2498 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2499 return -EFAULT;
2500 ret = ethtool_phy_tunable_valid(&tuna);
2501 if (ret)
2502 return ret;
2503 useraddr += sizeof(tuna);
2504 data = memdup_user(useraddr, tuna.len);
2505 if (IS_ERR(data))
2506 return PTR_ERR(data);
2507 mutex_lock(&phydev->lock);
2508 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2509 mutex_unlock(&phydev->lock);
2510
2511 kfree(data);
2512 return ret;
2513 }
2514
2515 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2516 {
2517 struct ethtool_fecparam fecparam = { ETHTOOL_GFECPARAM };
2518
2519 if (!dev->ethtool_ops->get_fecparam)
2520 return -EOPNOTSUPP;
2521
2522 dev->ethtool_ops->get_fecparam(dev, &fecparam);
2523
2524 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2525 return -EFAULT;
2526 return 0;
2527 }
2528
2529 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2530 {
2531 struct ethtool_fecparam fecparam;
2532
2533 if (!dev->ethtool_ops->set_fecparam)
2534 return -EOPNOTSUPP;
2535
2536 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2537 return -EFAULT;
2538
2539 return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2540 }
2541
2542 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
2543
2544 int dev_ethtool(struct net *net, struct ifreq *ifr)
2545 {
2546 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2547 void __user *useraddr = ifr->ifr_data;
2548 u32 ethcmd, sub_cmd;
2549 int rc;
2550 netdev_features_t old_features;
2551
2552 if (!dev || !netif_device_present(dev))
2553 return -ENODEV;
2554
2555 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2556 return -EFAULT;
2557
2558 if (ethcmd == ETHTOOL_PERQUEUE) {
2559 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2560 return -EFAULT;
2561 } else {
2562 sub_cmd = ethcmd;
2563 }
2564 /* Allow some commands to be done by anyone */
2565 switch (sub_cmd) {
2566 case ETHTOOL_GSET:
2567 case ETHTOOL_GDRVINFO:
2568 case ETHTOOL_GMSGLVL:
2569 case ETHTOOL_GLINK:
2570 case ETHTOOL_GCOALESCE:
2571 case ETHTOOL_GRINGPARAM:
2572 case ETHTOOL_GPAUSEPARAM:
2573 case ETHTOOL_GRXCSUM:
2574 case ETHTOOL_GTXCSUM:
2575 case ETHTOOL_GSG:
2576 case ETHTOOL_GSSET_INFO:
2577 case ETHTOOL_GSTRINGS:
2578 case ETHTOOL_GSTATS:
2579 case ETHTOOL_GPHYSTATS:
2580 case ETHTOOL_GTSO:
2581 case ETHTOOL_GPERMADDR:
2582 case ETHTOOL_GGSO:
2583 case ETHTOOL_GGRO:
2584 case ETHTOOL_GFLAGS:
2585 case ETHTOOL_GPFLAGS:
2586 case ETHTOOL_GRXFH:
2587 case ETHTOOL_GRXRINGS:
2588 case ETHTOOL_GRXCLSRLCNT:
2589 case ETHTOOL_GRXCLSRULE:
2590 case ETHTOOL_GRXCLSRLALL:
2591 case ETHTOOL_GRXFHINDIR:
2592 case ETHTOOL_GRSSH:
2593 case ETHTOOL_GFEATURES:
2594 case ETHTOOL_GCHANNELS:
2595 case ETHTOOL_GET_TS_INFO:
2596 case ETHTOOL_GEEE:
2597 case ETHTOOL_GTUNABLE:
2598 case ETHTOOL_PHY_GTUNABLE:
2599 case ETHTOOL_GLINKSETTINGS:
2600 case ETHTOOL_GFECPARAM:
2601 break;
2602 default:
2603 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2604 return -EPERM;
2605 }
2606
2607 if (dev->ethtool_ops->begin) {
2608 rc = dev->ethtool_ops->begin(dev);
2609 if (rc < 0)
2610 return rc;
2611 }
2612 old_features = dev->features;
2613
2614 switch (ethcmd) {
2615 case ETHTOOL_GSET:
2616 rc = ethtool_get_settings(dev, useraddr);
2617 break;
2618 case ETHTOOL_SSET:
2619 rc = ethtool_set_settings(dev, useraddr);
2620 break;
2621 case ETHTOOL_GDRVINFO:
2622 rc = ethtool_get_drvinfo(dev, useraddr);
2623 break;
2624 case ETHTOOL_GREGS:
2625 rc = ethtool_get_regs(dev, useraddr);
2626 break;
2627 case ETHTOOL_GWOL:
2628 rc = ethtool_get_wol(dev, useraddr);
2629 break;
2630 case ETHTOOL_SWOL:
2631 rc = ethtool_set_wol(dev, useraddr);
2632 break;
2633 case ETHTOOL_GMSGLVL:
2634 rc = ethtool_get_value(dev, useraddr, ethcmd,
2635 dev->ethtool_ops->get_msglevel);
2636 break;
2637 case ETHTOOL_SMSGLVL:
2638 rc = ethtool_set_value_void(dev, useraddr,
2639 dev->ethtool_ops->set_msglevel);
2640 break;
2641 case ETHTOOL_GEEE:
2642 rc = ethtool_get_eee(dev, useraddr);
2643 break;
2644 case ETHTOOL_SEEE:
2645 rc = ethtool_set_eee(dev, useraddr);
2646 break;
2647 case ETHTOOL_NWAY_RST:
2648 rc = ethtool_nway_reset(dev);
2649 break;
2650 case ETHTOOL_GLINK:
2651 rc = ethtool_get_link(dev, useraddr);
2652 break;
2653 case ETHTOOL_GEEPROM:
2654 rc = ethtool_get_eeprom(dev, useraddr);
2655 break;
2656 case ETHTOOL_SEEPROM:
2657 rc = ethtool_set_eeprom(dev, useraddr);
2658 break;
2659 case ETHTOOL_GCOALESCE:
2660 rc = ethtool_get_coalesce(dev, useraddr);
2661 break;
2662 case ETHTOOL_SCOALESCE:
2663 rc = ethtool_set_coalesce(dev, useraddr);
2664 break;
2665 case ETHTOOL_GRINGPARAM:
2666 rc = ethtool_get_ringparam(dev, useraddr);
2667 break;
2668 case ETHTOOL_SRINGPARAM:
2669 rc = ethtool_set_ringparam(dev, useraddr);
2670 break;
2671 case ETHTOOL_GPAUSEPARAM:
2672 rc = ethtool_get_pauseparam(dev, useraddr);
2673 break;
2674 case ETHTOOL_SPAUSEPARAM:
2675 rc = ethtool_set_pauseparam(dev, useraddr);
2676 break;
2677 case ETHTOOL_TEST:
2678 rc = ethtool_self_test(dev, useraddr);
2679 break;
2680 case ETHTOOL_GSTRINGS:
2681 rc = ethtool_get_strings(dev, useraddr);
2682 break;
2683 case ETHTOOL_PHYS_ID:
2684 rc = ethtool_phys_id(dev, useraddr);
2685 break;
2686 case ETHTOOL_GSTATS:
2687 rc = ethtool_get_stats(dev, useraddr);
2688 break;
2689 case ETHTOOL_GPERMADDR:
2690 rc = ethtool_get_perm_addr(dev, useraddr);
2691 break;
2692 case ETHTOOL_GFLAGS:
2693 rc = ethtool_get_value(dev, useraddr, ethcmd,
2694 __ethtool_get_flags);
2695 break;
2696 case ETHTOOL_SFLAGS:
2697 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2698 break;
2699 case ETHTOOL_GPFLAGS:
2700 rc = ethtool_get_value(dev, useraddr, ethcmd,
2701 dev->ethtool_ops->get_priv_flags);
2702 break;
2703 case ETHTOOL_SPFLAGS:
2704 rc = ethtool_set_value(dev, useraddr,
2705 dev->ethtool_ops->set_priv_flags);
2706 break;
2707 case ETHTOOL_GRXFH:
2708 case ETHTOOL_GRXRINGS:
2709 case ETHTOOL_GRXCLSRLCNT:
2710 case ETHTOOL_GRXCLSRULE:
2711 case ETHTOOL_GRXCLSRLALL:
2712 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2713 break;
2714 case ETHTOOL_SRXFH:
2715 case ETHTOOL_SRXCLSRLDEL:
2716 case ETHTOOL_SRXCLSRLINS:
2717 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2718 break;
2719 case ETHTOOL_FLASHDEV:
2720 rc = ethtool_flash_device(dev, useraddr);
2721 break;
2722 case ETHTOOL_RESET:
2723 rc = ethtool_reset(dev, useraddr);
2724 break;
2725 case ETHTOOL_GSSET_INFO:
2726 rc = ethtool_get_sset_info(dev, useraddr);
2727 break;
2728 case ETHTOOL_GRXFHINDIR:
2729 rc = ethtool_get_rxfh_indir(dev, useraddr);
2730 break;
2731 case ETHTOOL_SRXFHINDIR:
2732 rc = ethtool_set_rxfh_indir(dev, useraddr);
2733 break;
2734 case ETHTOOL_GRSSH:
2735 rc = ethtool_get_rxfh(dev, useraddr);
2736 break;
2737 case ETHTOOL_SRSSH:
2738 rc = ethtool_set_rxfh(dev, useraddr);
2739 break;
2740 case ETHTOOL_GFEATURES:
2741 rc = ethtool_get_features(dev, useraddr);
2742 break;
2743 case ETHTOOL_SFEATURES:
2744 rc = ethtool_set_features(dev, useraddr);
2745 break;
2746 case ETHTOOL_GTXCSUM:
2747 case ETHTOOL_GRXCSUM:
2748 case ETHTOOL_GSG:
2749 case ETHTOOL_GTSO:
2750 case ETHTOOL_GGSO:
2751 case ETHTOOL_GGRO:
2752 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2753 break;
2754 case ETHTOOL_STXCSUM:
2755 case ETHTOOL_SRXCSUM:
2756 case ETHTOOL_SSG:
2757 case ETHTOOL_STSO:
2758 case ETHTOOL_SGSO:
2759 case ETHTOOL_SGRO:
2760 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2761 break;
2762 case ETHTOOL_GCHANNELS:
2763 rc = ethtool_get_channels(dev, useraddr);
2764 break;
2765 case ETHTOOL_SCHANNELS:
2766 rc = ethtool_set_channels(dev, useraddr);
2767 break;
2768 case ETHTOOL_SET_DUMP:
2769 rc = ethtool_set_dump(dev, useraddr);
2770 break;
2771 case ETHTOOL_GET_DUMP_FLAG:
2772 rc = ethtool_get_dump_flag(dev, useraddr);
2773 break;
2774 case ETHTOOL_GET_DUMP_DATA:
2775 rc = ethtool_get_dump_data(dev, useraddr);
2776 break;
2777 case ETHTOOL_GET_TS_INFO:
2778 rc = ethtool_get_ts_info(dev, useraddr);
2779 break;
2780 case ETHTOOL_GMODULEINFO:
2781 rc = ethtool_get_module_info(dev, useraddr);
2782 break;
2783 case ETHTOOL_GMODULEEEPROM:
2784 rc = ethtool_get_module_eeprom(dev, useraddr);
2785 break;
2786 case ETHTOOL_GTUNABLE:
2787 rc = ethtool_get_tunable(dev, useraddr);
2788 break;
2789 case ETHTOOL_STUNABLE:
2790 rc = ethtool_set_tunable(dev, useraddr);
2791 break;
2792 case ETHTOOL_GPHYSTATS:
2793 rc = ethtool_get_phy_stats(dev, useraddr);
2794 break;
2795 case ETHTOOL_PERQUEUE:
2796 rc = ethtool_set_per_queue(dev, useraddr);
2797 break;
2798 case ETHTOOL_GLINKSETTINGS:
2799 rc = ethtool_get_link_ksettings(dev, useraddr);
2800 break;
2801 case ETHTOOL_SLINKSETTINGS:
2802 rc = ethtool_set_link_ksettings(dev, useraddr);
2803 break;
2804 case ETHTOOL_PHY_GTUNABLE:
2805 rc = get_phy_tunable(dev, useraddr);
2806 break;
2807 case ETHTOOL_PHY_STUNABLE:
2808 rc = set_phy_tunable(dev, useraddr);
2809 break;
2810 case ETHTOOL_GFECPARAM:
2811 rc = ethtool_get_fecparam(dev, useraddr);
2812 break;
2813 case ETHTOOL_SFECPARAM:
2814 rc = ethtool_set_fecparam(dev, useraddr);
2815 break;
2816 default:
2817 rc = -EOPNOTSUPP;
2818 }
2819
2820 if (dev->ethtool_ops->complete)
2821 dev->ethtool_ops->complete(dev);
2822
2823 if (old_features != dev->features)
2824 netdev_features_change(dev);
2825
2826 return rc;
2827 }
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