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