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
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_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
ethtool_get_features(struct net_device * dev,void __user * useraddr)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
ethtool_set_features(struct net_device * dev,void __user * useraddr)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
phy_get_sset_count(struct phy_device * phydev)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
__ethtool_get_sset_count(struct net_device * dev,int sset)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
__ethtool_get_strings(struct net_device * dev,u32 stringset,u8 * data)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
ethtool_get_feature_mask(u32 eth_cmd)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
ethtool_get_one_feature(struct net_device * dev,char __user * useraddr,u32 ethcmd)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
ethtool_set_one_feature(struct net_device * dev,void __user * useraddr,u32 ethcmd)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
__ethtool_get_flags(struct net_device * dev)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
__ethtool_set_flags(struct net_device * dev,u32 data)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
ethtool_convert_legacy_u32_to_link_mode(unsigned long * dst,u32 legacy_u32)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. */
ethtool_convert_link_mode_to_legacy_u32(u32 * legacy_u32,const unsigned long * src)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 * maxtxpkt/maxrxpkt. rest of ksettings always updated
440 */
441 static bool
convert_legacy_settings_to_link_ksettings(struct ethtool_link_ksettings * link_ksettings,const struct ethtool_cmd * legacy_settings)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->maxtxpkt ||
455 legacy_settings->maxrxpkt)
456 retval = false;
457
458 ethtool_convert_legacy_u32_to_link_mode(
459 link_ksettings->link_modes.supported,
460 legacy_settings->supported);
461 ethtool_convert_legacy_u32_to_link_mode(
462 link_ksettings->link_modes.advertising,
463 legacy_settings->advertising);
464 ethtool_convert_legacy_u32_to_link_mode(
465 link_ksettings->link_modes.lp_advertising,
466 legacy_settings->lp_advertising);
467 link_ksettings->base.speed
468 = ethtool_cmd_speed(legacy_settings);
469 link_ksettings->base.duplex
470 = legacy_settings->duplex;
471 link_ksettings->base.port
472 = legacy_settings->port;
473 link_ksettings->base.phy_address
474 = legacy_settings->phy_address;
475 link_ksettings->base.autoneg
476 = legacy_settings->autoneg;
477 link_ksettings->base.mdio_support
478 = legacy_settings->mdio_support;
479 link_ksettings->base.eth_tp_mdix
480 = legacy_settings->eth_tp_mdix;
481 link_ksettings->base.eth_tp_mdix_ctrl
482 = legacy_settings->eth_tp_mdix_ctrl;
483 return retval;
484 }
485
486 /* return false if ksettings link modes had higher bits
487 * set. legacy_settings always updated (best effort)
488 */
489 static bool
convert_link_ksettings_to_legacy_settings(struct ethtool_cmd * legacy_settings,const struct ethtool_link_ksettings * link_ksettings)490 convert_link_ksettings_to_legacy_settings(
491 struct ethtool_cmd *legacy_settings,
492 const struct ethtool_link_ksettings *link_ksettings)
493 {
494 bool retval = true;
495
496 memset(legacy_settings, 0, sizeof(*legacy_settings));
497 /* this also clears the deprecated fields in legacy structure:
498 * __u8 transceiver;
499 * __u32 maxtxpkt;
500 * __u32 maxrxpkt;
501 */
502
503 retval &= ethtool_convert_link_mode_to_legacy_u32(
504 &legacy_settings->supported,
505 link_ksettings->link_modes.supported);
506 retval &= ethtool_convert_link_mode_to_legacy_u32(
507 &legacy_settings->advertising,
508 link_ksettings->link_modes.advertising);
509 retval &= ethtool_convert_link_mode_to_legacy_u32(
510 &legacy_settings->lp_advertising,
511 link_ksettings->link_modes.lp_advertising);
512 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
513 legacy_settings->duplex
514 = link_ksettings->base.duplex;
515 legacy_settings->port
516 = link_ksettings->base.port;
517 legacy_settings->phy_address
518 = link_ksettings->base.phy_address;
519 legacy_settings->autoneg
520 = link_ksettings->base.autoneg;
521 legacy_settings->mdio_support
522 = link_ksettings->base.mdio_support;
523 legacy_settings->eth_tp_mdix
524 = link_ksettings->base.eth_tp_mdix;
525 legacy_settings->eth_tp_mdix_ctrl
526 = link_ksettings->base.eth_tp_mdix_ctrl;
527 legacy_settings->transceiver
528 = link_ksettings->base.transceiver;
529 return retval;
530 }
531
532 /* number of 32-bit words to store the user's link mode bitmaps */
533 #define __ETHTOOL_LINK_MODE_MASK_NU32 \
534 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
535
536 /* layout of the struct passed from/to userland */
537 struct ethtool_link_usettings {
538 struct ethtool_link_settings base;
539 struct {
540 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
541 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
542 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
543 } link_modes;
544 };
545
546 /* Internal kernel helper to query a device ethtool_link_settings.
547 *
548 * Backward compatibility note: for compatibility with legacy drivers
549 * that implement only the ethtool_cmd API, this has to work with both
550 * drivers implementing get_link_ksettings API and drivers
551 * implementing get_settings API. When drivers implement get_settings
552 * and report ethtool_cmd deprecated fields
553 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
554 * because the resulting struct ethtool_link_settings does not report them.
555 */
__ethtool_get_link_ksettings(struct net_device * dev,struct ethtool_link_ksettings * link_ksettings)556 int __ethtool_get_link_ksettings(struct net_device *dev,
557 struct ethtool_link_ksettings *link_ksettings)
558 {
559 int err;
560 struct ethtool_cmd cmd;
561
562 ASSERT_RTNL();
563
564 if (dev->ethtool_ops->get_link_ksettings) {
565 memset(link_ksettings, 0, sizeof(*link_ksettings));
566 return dev->ethtool_ops->get_link_ksettings(dev,
567 link_ksettings);
568 }
569
570 /* driver doesn't support %ethtool_link_ksettings API. revert to
571 * legacy %ethtool_cmd API, unless it's not supported either.
572 * TODO: remove when ethtool_ops::get_settings disappears internally
573 */
574 if (!dev->ethtool_ops->get_settings)
575 return -EOPNOTSUPP;
576
577 memset(&cmd, 0, sizeof(cmd));
578 cmd.cmd = ETHTOOL_GSET;
579 err = dev->ethtool_ops->get_settings(dev, &cmd);
580 if (err < 0)
581 return err;
582
583 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
584 */
585 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
586 return err;
587 }
588 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
589
590 /* convert ethtool_link_usettings in user space to a kernel internal
591 * ethtool_link_ksettings. return 0 on success, errno on error.
592 */
load_link_ksettings_from_user(struct ethtool_link_ksettings * to,const void __user * from)593 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
594 const void __user *from)
595 {
596 struct ethtool_link_usettings link_usettings;
597
598 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
599 return -EFAULT;
600
601 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
602 bitmap_from_u32array(to->link_modes.supported,
603 __ETHTOOL_LINK_MODE_MASK_NBITS,
604 link_usettings.link_modes.supported,
605 __ETHTOOL_LINK_MODE_MASK_NU32);
606 bitmap_from_u32array(to->link_modes.advertising,
607 __ETHTOOL_LINK_MODE_MASK_NBITS,
608 link_usettings.link_modes.advertising,
609 __ETHTOOL_LINK_MODE_MASK_NU32);
610 bitmap_from_u32array(to->link_modes.lp_advertising,
611 __ETHTOOL_LINK_MODE_MASK_NBITS,
612 link_usettings.link_modes.lp_advertising,
613 __ETHTOOL_LINK_MODE_MASK_NU32);
614
615 return 0;
616 }
617
618 /* convert a kernel internal ethtool_link_ksettings to
619 * ethtool_link_usettings in user space. return 0 on success, errno on
620 * error.
621 */
622 static int
store_link_ksettings_for_user(void __user * to,const struct ethtool_link_ksettings * from)623 store_link_ksettings_for_user(void __user *to,
624 const struct ethtool_link_ksettings *from)
625 {
626 struct ethtool_link_usettings link_usettings;
627
628 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
629 bitmap_to_u32array(link_usettings.link_modes.supported,
630 __ETHTOOL_LINK_MODE_MASK_NU32,
631 from->link_modes.supported,
632 __ETHTOOL_LINK_MODE_MASK_NBITS);
633 bitmap_to_u32array(link_usettings.link_modes.advertising,
634 __ETHTOOL_LINK_MODE_MASK_NU32,
635 from->link_modes.advertising,
636 __ETHTOOL_LINK_MODE_MASK_NBITS);
637 bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
638 __ETHTOOL_LINK_MODE_MASK_NU32,
639 from->link_modes.lp_advertising,
640 __ETHTOOL_LINK_MODE_MASK_NBITS);
641
642 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
643 return -EFAULT;
644
645 return 0;
646 }
647
648 /* Query device for its ethtool_link_settings.
649 *
650 * Backward compatibility note: this function must fail when driver
651 * does not implement ethtool::get_link_ksettings, even if legacy
652 * ethtool_ops::get_settings is implemented. This tells new versions
653 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
654 * this driver, so that they can correctly access the ethtool_cmd
655 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
656 * implements ethtool_ops::get_settings anymore.
657 */
ethtool_get_link_ksettings(struct net_device * dev,void __user * useraddr)658 static int ethtool_get_link_ksettings(struct net_device *dev,
659 void __user *useraddr)
660 {
661 int err = 0;
662 struct ethtool_link_ksettings link_ksettings;
663
664 ASSERT_RTNL();
665
666 if (!dev->ethtool_ops->get_link_ksettings)
667 return -EOPNOTSUPP;
668
669 /* handle bitmap nbits handshake */
670 if (copy_from_user(&link_ksettings.base, useraddr,
671 sizeof(link_ksettings.base)))
672 return -EFAULT;
673
674 if (__ETHTOOL_LINK_MODE_MASK_NU32
675 != link_ksettings.base.link_mode_masks_nwords) {
676 /* wrong link mode nbits requested */
677 memset(&link_ksettings, 0, sizeof(link_ksettings));
678 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
679 /* send back number of words required as negative val */
680 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
681 "need too many bits for link modes!");
682 link_ksettings.base.link_mode_masks_nwords
683 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
684
685 /* copy the base fields back to user, not the link
686 * mode bitmaps
687 */
688 if (copy_to_user(useraddr, &link_ksettings.base,
689 sizeof(link_ksettings.base)))
690 return -EFAULT;
691
692 return 0;
693 }
694
695 /* handshake successful: user/kernel agree on
696 * link_mode_masks_nwords
697 */
698
699 memset(&link_ksettings, 0, sizeof(link_ksettings));
700 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
701 if (err < 0)
702 return err;
703
704 /* make sure we tell the right values to user */
705 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
706 link_ksettings.base.link_mode_masks_nwords
707 = __ETHTOOL_LINK_MODE_MASK_NU32;
708
709 return store_link_ksettings_for_user(useraddr, &link_ksettings);
710 }
711
712 /* Update device ethtool_link_settings.
713 *
714 * Backward compatibility note: this function must fail when driver
715 * does not implement ethtool::set_link_ksettings, even if legacy
716 * ethtool_ops::set_settings is implemented. This tells new versions
717 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
718 * this driver, so that they can correctly update the ethtool_cmd
719 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
720 * implements ethtool_ops::get_settings anymore.
721 */
ethtool_set_link_ksettings(struct net_device * dev,void __user * useraddr)722 static int ethtool_set_link_ksettings(struct net_device *dev,
723 void __user *useraddr)
724 {
725 int err;
726 struct ethtool_link_ksettings link_ksettings;
727
728 ASSERT_RTNL();
729
730 if (!dev->ethtool_ops->set_link_ksettings)
731 return -EOPNOTSUPP;
732
733 /* make sure nbits field has expected value */
734 if (copy_from_user(&link_ksettings.base, useraddr,
735 sizeof(link_ksettings.base)))
736 return -EFAULT;
737
738 if (__ETHTOOL_LINK_MODE_MASK_NU32
739 != link_ksettings.base.link_mode_masks_nwords)
740 return -EINVAL;
741
742 /* copy the whole structure, now that we know it has expected
743 * format
744 */
745 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
746 if (err)
747 return err;
748
749 /* re-check nwords field, just in case */
750 if (__ETHTOOL_LINK_MODE_MASK_NU32
751 != link_ksettings.base.link_mode_masks_nwords)
752 return -EINVAL;
753
754 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
755 }
756
757 /* Query device for its ethtool_cmd settings.
758 *
759 * Backward compatibility note: for compatibility with legacy ethtool,
760 * this has to work with both drivers implementing get_link_ksettings
761 * API and drivers implementing get_settings API. When drivers
762 * implement get_link_ksettings and report higher link mode bits, a
763 * kernel warning is logged once (with name of 1st driver/device) to
764 * recommend user to upgrade ethtool, but the command is successful
765 * (only the lower link mode bits reported back to user).
766 */
ethtool_get_settings(struct net_device * dev,void __user * useraddr)767 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
768 {
769 struct ethtool_cmd cmd;
770
771 ASSERT_RTNL();
772
773 if (dev->ethtool_ops->get_link_ksettings) {
774 /* First, use link_ksettings API if it is supported */
775 int err;
776 struct ethtool_link_ksettings link_ksettings;
777
778 memset(&link_ksettings, 0, sizeof(link_ksettings));
779 err = dev->ethtool_ops->get_link_ksettings(dev,
780 &link_ksettings);
781 if (err < 0)
782 return err;
783 convert_link_ksettings_to_legacy_settings(&cmd,
784 &link_ksettings);
785
786 /* send a sensible cmd tag back to user */
787 cmd.cmd = ETHTOOL_GSET;
788 } else {
789 /* driver doesn't support %ethtool_link_ksettings
790 * API. revert to legacy %ethtool_cmd API, unless it's
791 * not supported either.
792 */
793 int err;
794
795 if (!dev->ethtool_ops->get_settings)
796 return -EOPNOTSUPP;
797
798 memset(&cmd, 0, sizeof(cmd));
799 cmd.cmd = ETHTOOL_GSET;
800 err = dev->ethtool_ops->get_settings(dev, &cmd);
801 if (err < 0)
802 return err;
803 }
804
805 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
806 return -EFAULT;
807
808 return 0;
809 }
810
811 /* Update device link settings with given ethtool_cmd.
812 *
813 * Backward compatibility note: for compatibility with legacy ethtool,
814 * this has to work with both drivers implementing set_link_ksettings
815 * API and drivers implementing set_settings API. When drivers
816 * implement set_link_ksettings and user's request updates deprecated
817 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
818 * warning is logged once (with name of 1st driver/device) to
819 * recommend user to upgrade ethtool, and the request is rejected.
820 */
ethtool_set_settings(struct net_device * dev,void __user * useraddr)821 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
822 {
823 struct ethtool_cmd cmd;
824
825 ASSERT_RTNL();
826
827 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
828 return -EFAULT;
829
830 /* first, try new %ethtool_link_ksettings API. */
831 if (dev->ethtool_ops->set_link_ksettings) {
832 struct ethtool_link_ksettings link_ksettings;
833
834 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
835 &cmd))
836 return -EINVAL;
837
838 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
839 link_ksettings.base.link_mode_masks_nwords
840 = __ETHTOOL_LINK_MODE_MASK_NU32;
841 return dev->ethtool_ops->set_link_ksettings(dev,
842 &link_ksettings);
843 }
844
845 /* legacy %ethtool_cmd API */
846
847 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
848 * disappears internally
849 */
850
851 if (!dev->ethtool_ops->set_settings)
852 return -EOPNOTSUPP;
853
854 return dev->ethtool_ops->set_settings(dev, &cmd);
855 }
856
ethtool_get_drvinfo(struct net_device * dev,void __user * useraddr)857 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
858 void __user *useraddr)
859 {
860 struct ethtool_drvinfo info;
861 const struct ethtool_ops *ops = dev->ethtool_ops;
862
863 memset(&info, 0, sizeof(info));
864 info.cmd = ETHTOOL_GDRVINFO;
865 if (ops->get_drvinfo) {
866 ops->get_drvinfo(dev, &info);
867 } else if (dev->dev.parent && dev->dev.parent->driver) {
868 strlcpy(info.bus_info, dev_name(dev->dev.parent),
869 sizeof(info.bus_info));
870 strlcpy(info.driver, dev->dev.parent->driver->name,
871 sizeof(info.driver));
872 } else {
873 return -EOPNOTSUPP;
874 }
875
876 /*
877 * this method of obtaining string set info is deprecated;
878 * Use ETHTOOL_GSSET_INFO instead.
879 */
880 if (ops->get_sset_count) {
881 int rc;
882
883 rc = ops->get_sset_count(dev, ETH_SS_TEST);
884 if (rc >= 0)
885 info.testinfo_len = rc;
886 rc = ops->get_sset_count(dev, ETH_SS_STATS);
887 if (rc >= 0)
888 info.n_stats = rc;
889 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
890 if (rc >= 0)
891 info.n_priv_flags = rc;
892 }
893 if (ops->get_regs_len) {
894 int ret = ops->get_regs_len(dev);
895
896 if (ret > 0)
897 info.regdump_len = ret;
898 }
899
900 if (ops->get_eeprom_len)
901 info.eedump_len = ops->get_eeprom_len(dev);
902
903 if (copy_to_user(useraddr, &info, sizeof(info)))
904 return -EFAULT;
905 return 0;
906 }
907
ethtool_get_sset_info(struct net_device * dev,void __user * useraddr)908 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
909 void __user *useraddr)
910 {
911 struct ethtool_sset_info info;
912 u64 sset_mask;
913 int i, idx = 0, n_bits = 0, ret, rc;
914 u32 *info_buf = NULL;
915
916 if (copy_from_user(&info, useraddr, sizeof(info)))
917 return -EFAULT;
918
919 /* store copy of mask, because we zero struct later on */
920 sset_mask = info.sset_mask;
921 if (!sset_mask)
922 return 0;
923
924 /* calculate size of return buffer */
925 n_bits = hweight64(sset_mask);
926
927 memset(&info, 0, sizeof(info));
928 info.cmd = ETHTOOL_GSSET_INFO;
929
930 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
931 if (!info_buf)
932 return -ENOMEM;
933
934 /*
935 * fill return buffer based on input bitmask and successful
936 * get_sset_count return
937 */
938 for (i = 0; i < 64; i++) {
939 if (!(sset_mask & (1ULL << i)))
940 continue;
941
942 rc = __ethtool_get_sset_count(dev, i);
943 if (rc >= 0) {
944 info.sset_mask |= (1ULL << i);
945 info_buf[idx++] = rc;
946 }
947 }
948
949 ret = -EFAULT;
950 if (copy_to_user(useraddr, &info, sizeof(info)))
951 goto out;
952
953 useraddr += offsetof(struct ethtool_sset_info, data);
954 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
955 goto out;
956
957 ret = 0;
958
959 out:
960 kfree(info_buf);
961 return ret;
962 }
963
ethtool_set_rxnfc(struct net_device * dev,u32 cmd,void __user * useraddr)964 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
965 u32 cmd, void __user *useraddr)
966 {
967 struct ethtool_rxnfc info;
968 size_t info_size = sizeof(info);
969 int rc;
970
971 if (!dev->ethtool_ops->set_rxnfc)
972 return -EOPNOTSUPP;
973
974 /* struct ethtool_rxnfc was originally defined for
975 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
976 * members. User-space might still be using that
977 * definition. */
978 if (cmd == ETHTOOL_SRXFH)
979 info_size = (offsetof(struct ethtool_rxnfc, data) +
980 sizeof(info.data));
981
982 if (copy_from_user(&info, useraddr, info_size))
983 return -EFAULT;
984
985 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
986 if (rc)
987 return rc;
988
989 if (cmd == ETHTOOL_SRXCLSRLINS &&
990 copy_to_user(useraddr, &info, info_size))
991 return -EFAULT;
992
993 return 0;
994 }
995
ethtool_get_rxnfc(struct net_device * dev,u32 cmd,void __user * useraddr)996 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
997 u32 cmd, void __user *useraddr)
998 {
999 struct ethtool_rxnfc info;
1000 size_t info_size = sizeof(info);
1001 const struct ethtool_ops *ops = dev->ethtool_ops;
1002 int ret;
1003 void *rule_buf = NULL;
1004
1005 if (!ops->get_rxnfc)
1006 return -EOPNOTSUPP;
1007
1008 /* struct ethtool_rxnfc was originally defined for
1009 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1010 * members. User-space might still be using that
1011 * definition. */
1012 if (cmd == ETHTOOL_GRXFH)
1013 info_size = (offsetof(struct ethtool_rxnfc, data) +
1014 sizeof(info.data));
1015
1016 if (copy_from_user(&info, useraddr, info_size))
1017 return -EFAULT;
1018
1019 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1020 if (info.rule_cnt > 0) {
1021 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1022 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
1023 GFP_USER);
1024 if (!rule_buf)
1025 return -ENOMEM;
1026 }
1027 }
1028
1029 ret = ops->get_rxnfc(dev, &info, rule_buf);
1030 if (ret < 0)
1031 goto err_out;
1032
1033 ret = -EFAULT;
1034 if (copy_to_user(useraddr, &info, info_size))
1035 goto err_out;
1036
1037 if (rule_buf) {
1038 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1039 if (copy_to_user(useraddr, rule_buf,
1040 info.rule_cnt * sizeof(u32)))
1041 goto err_out;
1042 }
1043 ret = 0;
1044
1045 err_out:
1046 kfree(rule_buf);
1047
1048 return ret;
1049 }
1050
ethtool_copy_validate_indir(u32 * indir,void __user * useraddr,struct ethtool_rxnfc * rx_rings,u32 size)1051 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1052 struct ethtool_rxnfc *rx_rings,
1053 u32 size)
1054 {
1055 int i;
1056
1057 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1058 return -EFAULT;
1059
1060 /* Validate ring indices */
1061 for (i = 0; i < size; i++)
1062 if (indir[i] >= rx_rings->data)
1063 return -EINVAL;
1064
1065 return 0;
1066 }
1067
1068 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1069
netdev_rss_key_fill(void * buffer,size_t len)1070 void netdev_rss_key_fill(void *buffer, size_t len)
1071 {
1072 BUG_ON(len > sizeof(netdev_rss_key));
1073 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1074 memcpy(buffer, netdev_rss_key, len);
1075 }
1076 EXPORT_SYMBOL(netdev_rss_key_fill);
1077
ethtool_get_max_rxfh_channel(struct net_device * dev,u32 * max)1078 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1079 {
1080 u32 dev_size, current_max = 0;
1081 u32 *indir;
1082 int ret;
1083
1084 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1085 !dev->ethtool_ops->get_rxfh)
1086 return -EOPNOTSUPP;
1087 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1088 if (dev_size == 0)
1089 return -EOPNOTSUPP;
1090
1091 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1092 if (!indir)
1093 return -ENOMEM;
1094
1095 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1096 if (ret)
1097 goto out;
1098
1099 while (dev_size--)
1100 current_max = max(current_max, indir[dev_size]);
1101
1102 *max = current_max;
1103
1104 out:
1105 kfree(indir);
1106 return ret;
1107 }
1108
ethtool_get_rxfh_indir(struct net_device * dev,void __user * useraddr)1109 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1110 void __user *useraddr)
1111 {
1112 u32 user_size, dev_size;
1113 u32 *indir;
1114 int ret;
1115
1116 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1117 !dev->ethtool_ops->get_rxfh)
1118 return -EOPNOTSUPP;
1119 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1120 if (dev_size == 0)
1121 return -EOPNOTSUPP;
1122
1123 if (copy_from_user(&user_size,
1124 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1125 sizeof(user_size)))
1126 return -EFAULT;
1127
1128 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1129 &dev_size, sizeof(dev_size)))
1130 return -EFAULT;
1131
1132 /* If the user buffer size is 0, this is just a query for the
1133 * device table size. Otherwise, if it's smaller than the
1134 * device table size it's an error.
1135 */
1136 if (user_size < dev_size)
1137 return user_size == 0 ? 0 : -EINVAL;
1138
1139 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1140 if (!indir)
1141 return -ENOMEM;
1142
1143 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1144 if (ret)
1145 goto out;
1146
1147 if (copy_to_user(useraddr +
1148 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1149 indir, dev_size * sizeof(indir[0])))
1150 ret = -EFAULT;
1151
1152 out:
1153 kfree(indir);
1154 return ret;
1155 }
1156
ethtool_set_rxfh_indir(struct net_device * dev,void __user * useraddr)1157 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1158 void __user *useraddr)
1159 {
1160 struct ethtool_rxnfc rx_rings;
1161 u32 user_size, dev_size, i;
1162 u32 *indir;
1163 const struct ethtool_ops *ops = dev->ethtool_ops;
1164 int ret;
1165 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1166
1167 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1168 !ops->get_rxnfc)
1169 return -EOPNOTSUPP;
1170
1171 dev_size = ops->get_rxfh_indir_size(dev);
1172 if (dev_size == 0)
1173 return -EOPNOTSUPP;
1174
1175 if (copy_from_user(&user_size,
1176 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1177 sizeof(user_size)))
1178 return -EFAULT;
1179
1180 if (user_size != 0 && user_size != dev_size)
1181 return -EINVAL;
1182
1183 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1184 if (!indir)
1185 return -ENOMEM;
1186
1187 rx_rings.cmd = ETHTOOL_GRXRINGS;
1188 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1189 if (ret)
1190 goto out;
1191
1192 if (user_size == 0) {
1193 for (i = 0; i < dev_size; i++)
1194 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1195 } else {
1196 ret = ethtool_copy_validate_indir(indir,
1197 useraddr + ringidx_offset,
1198 &rx_rings,
1199 dev_size);
1200 if (ret)
1201 goto out;
1202 }
1203
1204 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1205 if (ret)
1206 goto out;
1207
1208 /* indicate whether rxfh was set to default */
1209 if (user_size == 0)
1210 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1211 else
1212 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1213
1214 out:
1215 kfree(indir);
1216 return ret;
1217 }
1218
ethtool_get_rxfh(struct net_device * dev,void __user * useraddr)1219 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1220 void __user *useraddr)
1221 {
1222 int ret;
1223 const struct ethtool_ops *ops = dev->ethtool_ops;
1224 u32 user_indir_size, user_key_size;
1225 u32 dev_indir_size = 0, dev_key_size = 0;
1226 struct ethtool_rxfh rxfh;
1227 u32 total_size;
1228 u32 indir_bytes;
1229 u32 *indir = NULL;
1230 u8 dev_hfunc = 0;
1231 u8 *hkey = NULL;
1232 u8 *rss_config;
1233
1234 if (!ops->get_rxfh)
1235 return -EOPNOTSUPP;
1236
1237 if (ops->get_rxfh_indir_size)
1238 dev_indir_size = ops->get_rxfh_indir_size(dev);
1239 if (ops->get_rxfh_key_size)
1240 dev_key_size = ops->get_rxfh_key_size(dev);
1241
1242 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1243 return -EFAULT;
1244 user_indir_size = rxfh.indir_size;
1245 user_key_size = rxfh.key_size;
1246
1247 /* Check that reserved fields are 0 for now */
1248 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1249 rxfh.rsvd8[2] || rxfh.rsvd32)
1250 return -EINVAL;
1251
1252 rxfh.indir_size = dev_indir_size;
1253 rxfh.key_size = dev_key_size;
1254 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1255 return -EFAULT;
1256
1257 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1258 (user_key_size && (user_key_size != dev_key_size)))
1259 return -EINVAL;
1260
1261 indir_bytes = user_indir_size * sizeof(indir[0]);
1262 total_size = indir_bytes + user_key_size;
1263 rss_config = kzalloc(total_size, GFP_USER);
1264 if (!rss_config)
1265 return -ENOMEM;
1266
1267 if (user_indir_size)
1268 indir = (u32 *)rss_config;
1269
1270 if (user_key_size)
1271 hkey = rss_config + indir_bytes;
1272
1273 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1274 if (ret)
1275 goto out;
1276
1277 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1278 &dev_hfunc, sizeof(rxfh.hfunc))) {
1279 ret = -EFAULT;
1280 } else if (copy_to_user(useraddr +
1281 offsetof(struct ethtool_rxfh, rss_config[0]),
1282 rss_config, total_size)) {
1283 ret = -EFAULT;
1284 }
1285 out:
1286 kfree(rss_config);
1287
1288 return ret;
1289 }
1290
ethtool_set_rxfh(struct net_device * dev,void __user * useraddr)1291 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1292 void __user *useraddr)
1293 {
1294 int ret;
1295 const struct ethtool_ops *ops = dev->ethtool_ops;
1296 struct ethtool_rxnfc rx_rings;
1297 struct ethtool_rxfh rxfh;
1298 u32 dev_indir_size = 0, dev_key_size = 0, i;
1299 u32 *indir = NULL, indir_bytes = 0;
1300 u8 *hkey = NULL;
1301 u8 *rss_config;
1302 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1303
1304 if (!ops->get_rxnfc || !ops->set_rxfh)
1305 return -EOPNOTSUPP;
1306
1307 if (ops->get_rxfh_indir_size)
1308 dev_indir_size = ops->get_rxfh_indir_size(dev);
1309 if (ops->get_rxfh_key_size)
1310 dev_key_size = ops->get_rxfh_key_size(dev);
1311
1312 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1313 return -EFAULT;
1314
1315 /* Check that reserved fields are 0 for now */
1316 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1317 rxfh.rsvd8[2] || rxfh.rsvd32)
1318 return -EINVAL;
1319
1320 /* If either indir, hash key or function is valid, proceed further.
1321 * Must request at least one change: indir size, hash key or function.
1322 */
1323 if ((rxfh.indir_size &&
1324 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1325 rxfh.indir_size != dev_indir_size) ||
1326 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1327 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1328 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1329 return -EINVAL;
1330
1331 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1332 indir_bytes = dev_indir_size * sizeof(indir[0]);
1333
1334 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1335 if (!rss_config)
1336 return -ENOMEM;
1337
1338 rx_rings.cmd = ETHTOOL_GRXRINGS;
1339 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1340 if (ret)
1341 goto out;
1342
1343 /* rxfh.indir_size == 0 means reset the indir table to default.
1344 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1345 */
1346 if (rxfh.indir_size &&
1347 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1348 indir = (u32 *)rss_config;
1349 ret = ethtool_copy_validate_indir(indir,
1350 useraddr + rss_cfg_offset,
1351 &rx_rings,
1352 rxfh.indir_size);
1353 if (ret)
1354 goto out;
1355 } else if (rxfh.indir_size == 0) {
1356 indir = (u32 *)rss_config;
1357 for (i = 0; i < dev_indir_size; i++)
1358 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1359 }
1360
1361 if (rxfh.key_size) {
1362 hkey = rss_config + indir_bytes;
1363 if (copy_from_user(hkey,
1364 useraddr + rss_cfg_offset + indir_bytes,
1365 rxfh.key_size)) {
1366 ret = -EFAULT;
1367 goto out;
1368 }
1369 }
1370
1371 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1372 if (ret)
1373 goto out;
1374
1375 /* indicate whether rxfh was set to default */
1376 if (rxfh.indir_size == 0)
1377 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1378 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1379 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1380
1381 out:
1382 kfree(rss_config);
1383 return ret;
1384 }
1385
ethtool_get_regs(struct net_device * dev,char __user * useraddr)1386 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1387 {
1388 struct ethtool_regs regs;
1389 const struct ethtool_ops *ops = dev->ethtool_ops;
1390 void *regbuf;
1391 int reglen, ret;
1392
1393 if (!ops->get_regs || !ops->get_regs_len)
1394 return -EOPNOTSUPP;
1395
1396 if (copy_from_user(®s, useraddr, sizeof(regs)))
1397 return -EFAULT;
1398
1399 reglen = ops->get_regs_len(dev);
1400 if (reglen <= 0)
1401 return reglen;
1402
1403 if (regs.len > reglen)
1404 regs.len = reglen;
1405
1406 regbuf = NULL;
1407 if (reglen) {
1408 regbuf = vzalloc(reglen);
1409 if (!regbuf)
1410 return -ENOMEM;
1411 }
1412
1413 if (regs.len < reglen)
1414 reglen = regs.len;
1415
1416 ops->get_regs(dev, ®s, regbuf);
1417
1418 ret = -EFAULT;
1419 if (copy_to_user(useraddr, ®s, sizeof(regs)))
1420 goto out;
1421 useraddr += offsetof(struct ethtool_regs, data);
1422 if (copy_to_user(useraddr, regbuf, reglen))
1423 goto out;
1424 ret = 0;
1425
1426 out:
1427 vfree(regbuf);
1428 return ret;
1429 }
1430
ethtool_reset(struct net_device * dev,char __user * useraddr)1431 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1432 {
1433 struct ethtool_value reset;
1434 int ret;
1435
1436 if (!dev->ethtool_ops->reset)
1437 return -EOPNOTSUPP;
1438
1439 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1440 return -EFAULT;
1441
1442 ret = dev->ethtool_ops->reset(dev, &reset.data);
1443 if (ret)
1444 return ret;
1445
1446 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1447 return -EFAULT;
1448 return 0;
1449 }
1450
ethtool_get_wol(struct net_device * dev,char __user * useraddr)1451 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1452 {
1453 struct ethtool_wolinfo wol;
1454
1455 if (!dev->ethtool_ops->get_wol)
1456 return -EOPNOTSUPP;
1457
1458 memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1459 wol.cmd = ETHTOOL_GWOL;
1460 dev->ethtool_ops->get_wol(dev, &wol);
1461
1462 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1463 return -EFAULT;
1464 return 0;
1465 }
1466
ethtool_set_wol(struct net_device * dev,char __user * useraddr)1467 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1468 {
1469 struct ethtool_wolinfo wol;
1470
1471 if (!dev->ethtool_ops->set_wol)
1472 return -EOPNOTSUPP;
1473
1474 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1475 return -EFAULT;
1476
1477 return dev->ethtool_ops->set_wol(dev, &wol);
1478 }
1479
ethtool_get_eee(struct net_device * dev,char __user * useraddr)1480 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1481 {
1482 struct ethtool_eee edata;
1483 int rc;
1484
1485 if (!dev->ethtool_ops->get_eee)
1486 return -EOPNOTSUPP;
1487
1488 memset(&edata, 0, sizeof(struct ethtool_eee));
1489 edata.cmd = ETHTOOL_GEEE;
1490 rc = dev->ethtool_ops->get_eee(dev, &edata);
1491
1492 if (rc)
1493 return rc;
1494
1495 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1496 return -EFAULT;
1497
1498 return 0;
1499 }
1500
ethtool_set_eee(struct net_device * dev,char __user * useraddr)1501 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1502 {
1503 struct ethtool_eee edata;
1504
1505 if (!dev->ethtool_ops->set_eee)
1506 return -EOPNOTSUPP;
1507
1508 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1509 return -EFAULT;
1510
1511 return dev->ethtool_ops->set_eee(dev, &edata);
1512 }
1513
ethtool_nway_reset(struct net_device * dev)1514 static int ethtool_nway_reset(struct net_device *dev)
1515 {
1516 if (!dev->ethtool_ops->nway_reset)
1517 return -EOPNOTSUPP;
1518
1519 return dev->ethtool_ops->nway_reset(dev);
1520 }
1521
ethtool_get_link(struct net_device * dev,char __user * useraddr)1522 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1523 {
1524 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1525
1526 if (!dev->ethtool_ops->get_link)
1527 return -EOPNOTSUPP;
1528
1529 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1530
1531 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1532 return -EFAULT;
1533 return 0;
1534 }
1535
ethtool_get_any_eeprom(struct net_device * dev,void __user * useraddr,int (* getter)(struct net_device *,struct ethtool_eeprom *,u8 *),u32 total_len)1536 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1537 int (*getter)(struct net_device *,
1538 struct ethtool_eeprom *, u8 *),
1539 u32 total_len)
1540 {
1541 struct ethtool_eeprom eeprom;
1542 void __user *userbuf = useraddr + sizeof(eeprom);
1543 u32 bytes_remaining;
1544 u8 *data;
1545 int ret = 0;
1546
1547 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1548 return -EFAULT;
1549
1550 /* Check for wrap and zero */
1551 if (eeprom.offset + eeprom.len <= eeprom.offset)
1552 return -EINVAL;
1553
1554 /* Check for exceeding total eeprom len */
1555 if (eeprom.offset + eeprom.len > total_len)
1556 return -EINVAL;
1557
1558 data = kmalloc(PAGE_SIZE, GFP_USER);
1559 if (!data)
1560 return -ENOMEM;
1561
1562 bytes_remaining = eeprom.len;
1563 while (bytes_remaining > 0) {
1564 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1565
1566 ret = getter(dev, &eeprom, data);
1567 if (ret)
1568 break;
1569 if (copy_to_user(userbuf, data, eeprom.len)) {
1570 ret = -EFAULT;
1571 break;
1572 }
1573 userbuf += eeprom.len;
1574 eeprom.offset += eeprom.len;
1575 bytes_remaining -= eeprom.len;
1576 }
1577
1578 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1579 eeprom.offset -= eeprom.len;
1580 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1581 ret = -EFAULT;
1582
1583 kfree(data);
1584 return ret;
1585 }
1586
ethtool_get_eeprom(struct net_device * dev,void __user * useraddr)1587 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1588 {
1589 const struct ethtool_ops *ops = dev->ethtool_ops;
1590
1591 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1592 !ops->get_eeprom_len(dev))
1593 return -EOPNOTSUPP;
1594
1595 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1596 ops->get_eeprom_len(dev));
1597 }
1598
ethtool_set_eeprom(struct net_device * dev,void __user * useraddr)1599 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1600 {
1601 struct ethtool_eeprom eeprom;
1602 const struct ethtool_ops *ops = dev->ethtool_ops;
1603 void __user *userbuf = useraddr + sizeof(eeprom);
1604 u32 bytes_remaining;
1605 u8 *data;
1606 int ret = 0;
1607
1608 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1609 !ops->get_eeprom_len(dev))
1610 return -EOPNOTSUPP;
1611
1612 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1613 return -EFAULT;
1614
1615 /* Check for wrap and zero */
1616 if (eeprom.offset + eeprom.len <= eeprom.offset)
1617 return -EINVAL;
1618
1619 /* Check for exceeding total eeprom len */
1620 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1621 return -EINVAL;
1622
1623 data = kmalloc(PAGE_SIZE, GFP_USER);
1624 if (!data)
1625 return -ENOMEM;
1626
1627 bytes_remaining = eeprom.len;
1628 while (bytes_remaining > 0) {
1629 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1630
1631 if (copy_from_user(data, userbuf, eeprom.len)) {
1632 ret = -EFAULT;
1633 break;
1634 }
1635 ret = ops->set_eeprom(dev, &eeprom, data);
1636 if (ret)
1637 break;
1638 userbuf += eeprom.len;
1639 eeprom.offset += eeprom.len;
1640 bytes_remaining -= eeprom.len;
1641 }
1642
1643 kfree(data);
1644 return ret;
1645 }
1646
ethtool_get_coalesce(struct net_device * dev,void __user * useraddr)1647 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1648 void __user *useraddr)
1649 {
1650 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1651
1652 if (!dev->ethtool_ops->get_coalesce)
1653 return -EOPNOTSUPP;
1654
1655 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1656
1657 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1658 return -EFAULT;
1659 return 0;
1660 }
1661
ethtool_set_coalesce(struct net_device * dev,void __user * useraddr)1662 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1663 void __user *useraddr)
1664 {
1665 struct ethtool_coalesce coalesce;
1666
1667 if (!dev->ethtool_ops->set_coalesce)
1668 return -EOPNOTSUPP;
1669
1670 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1671 return -EFAULT;
1672
1673 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1674 }
1675
ethtool_get_ringparam(struct net_device * dev,void __user * useraddr)1676 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1677 {
1678 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1679
1680 if (!dev->ethtool_ops->get_ringparam)
1681 return -EOPNOTSUPP;
1682
1683 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1684
1685 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1686 return -EFAULT;
1687 return 0;
1688 }
1689
ethtool_set_ringparam(struct net_device * dev,void __user * useraddr)1690 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1691 {
1692 struct ethtool_ringparam ringparam;
1693
1694 if (!dev->ethtool_ops->set_ringparam)
1695 return -EOPNOTSUPP;
1696
1697 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1698 return -EFAULT;
1699
1700 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1701 }
1702
ethtool_get_channels(struct net_device * dev,void __user * useraddr)1703 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1704 void __user *useraddr)
1705 {
1706 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1707
1708 if (!dev->ethtool_ops->get_channels)
1709 return -EOPNOTSUPP;
1710
1711 dev->ethtool_ops->get_channels(dev, &channels);
1712
1713 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1714 return -EFAULT;
1715 return 0;
1716 }
1717
ethtool_set_channels(struct net_device * dev,void __user * useraddr)1718 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1719 void __user *useraddr)
1720 {
1721 struct ethtool_channels channels, max = { .cmd = ETHTOOL_GCHANNELS };
1722 u32 max_rx_in_use = 0;
1723
1724 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1725 return -EOPNOTSUPP;
1726
1727 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1728 return -EFAULT;
1729
1730 dev->ethtool_ops->get_channels(dev, &max);
1731
1732 /* ensure new counts are within the maximums */
1733 if ((channels.rx_count > max.max_rx) ||
1734 (channels.tx_count > max.max_tx) ||
1735 (channels.combined_count > max.max_combined) ||
1736 (channels.other_count > max.max_other))
1737 return -EINVAL;
1738
1739 /* ensure the new Rx count fits within the configured Rx flow
1740 * indirection table settings */
1741 if (netif_is_rxfh_configured(dev) &&
1742 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1743 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1744 return -EINVAL;
1745
1746 return dev->ethtool_ops->set_channels(dev, &channels);
1747 }
1748
ethtool_get_pauseparam(struct net_device * dev,void __user * useraddr)1749 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1750 {
1751 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1752
1753 if (!dev->ethtool_ops->get_pauseparam)
1754 return -EOPNOTSUPP;
1755
1756 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1757
1758 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1759 return -EFAULT;
1760 return 0;
1761 }
1762
ethtool_set_pauseparam(struct net_device * dev,void __user * useraddr)1763 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1764 {
1765 struct ethtool_pauseparam pauseparam;
1766
1767 if (!dev->ethtool_ops->set_pauseparam)
1768 return -EOPNOTSUPP;
1769
1770 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1771 return -EFAULT;
1772
1773 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1774 }
1775
ethtool_self_test(struct net_device * dev,char __user * useraddr)1776 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1777 {
1778 struct ethtool_test test;
1779 const struct ethtool_ops *ops = dev->ethtool_ops;
1780 u64 *data;
1781 int ret, test_len;
1782
1783 if (!ops->self_test || !ops->get_sset_count)
1784 return -EOPNOTSUPP;
1785
1786 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1787 if (test_len < 0)
1788 return test_len;
1789 WARN_ON(test_len == 0);
1790
1791 if (copy_from_user(&test, useraddr, sizeof(test)))
1792 return -EFAULT;
1793
1794 test.len = test_len;
1795 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1796 if (!data)
1797 return -ENOMEM;
1798
1799 ops->self_test(dev, &test, data);
1800
1801 ret = -EFAULT;
1802 if (copy_to_user(useraddr, &test, sizeof(test)))
1803 goto out;
1804 useraddr += sizeof(test);
1805 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1806 goto out;
1807 ret = 0;
1808
1809 out:
1810 kfree(data);
1811 return ret;
1812 }
1813
ethtool_get_strings(struct net_device * dev,void __user * useraddr)1814 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1815 {
1816 struct ethtool_gstrings gstrings;
1817 u8 *data;
1818 int ret;
1819
1820 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1821 return -EFAULT;
1822
1823 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1824 if (ret < 0)
1825 return ret;
1826 if (ret > S32_MAX / ETH_GSTRING_LEN)
1827 return -ENOMEM;
1828 WARN_ON_ONCE(!ret);
1829
1830 gstrings.len = ret;
1831 if (gstrings.len) {
1832 data = vzalloc(gstrings.len * ETH_GSTRING_LEN);
1833 if (!data)
1834 return -ENOMEM;
1835
1836 __ethtool_get_strings(dev, gstrings.string_set, data);
1837 } else {
1838 data = NULL;
1839 }
1840
1841 ret = -EFAULT;
1842 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1843 goto out;
1844 useraddr += sizeof(gstrings);
1845 if (gstrings.len &&
1846 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1847 goto out;
1848 ret = 0;
1849
1850 out:
1851 vfree(data);
1852 return ret;
1853 }
1854
ethtool_phys_id(struct net_device * dev,void __user * useraddr)1855 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1856 {
1857 struct ethtool_value id;
1858 static bool busy;
1859 const struct ethtool_ops *ops = dev->ethtool_ops;
1860 int rc;
1861
1862 if (!ops->set_phys_id)
1863 return -EOPNOTSUPP;
1864
1865 if (busy)
1866 return -EBUSY;
1867
1868 if (copy_from_user(&id, useraddr, sizeof(id)))
1869 return -EFAULT;
1870
1871 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1872 if (rc < 0)
1873 return rc;
1874
1875 /* Drop the RTNL lock while waiting, but prevent reentry or
1876 * removal of the device.
1877 */
1878 busy = true;
1879 dev_hold(dev);
1880 rtnl_unlock();
1881
1882 if (rc == 0) {
1883 /* Driver will handle this itself */
1884 schedule_timeout_interruptible(
1885 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1886 } else {
1887 /* Driver expects to be called at twice the frequency in rc */
1888 int n = rc * 2, i, interval = HZ / n;
1889
1890 /* Count down seconds */
1891 do {
1892 /* Count down iterations per second */
1893 i = n;
1894 do {
1895 rtnl_lock();
1896 rc = ops->set_phys_id(dev,
1897 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1898 rtnl_unlock();
1899 if (rc)
1900 break;
1901 schedule_timeout_interruptible(interval);
1902 } while (!signal_pending(current) && --i != 0);
1903 } while (!signal_pending(current) &&
1904 (id.data == 0 || --id.data != 0));
1905 }
1906
1907 rtnl_lock();
1908 dev_put(dev);
1909 busy = false;
1910
1911 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1912 return rc;
1913 }
1914
ethtool_get_stats(struct net_device * dev,void __user * useraddr)1915 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1916 {
1917 struct ethtool_stats stats;
1918 const struct ethtool_ops *ops = dev->ethtool_ops;
1919 u64 *data;
1920 int ret, n_stats;
1921
1922 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1923 return -EOPNOTSUPP;
1924
1925 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1926 if (n_stats < 0)
1927 return n_stats;
1928 if (n_stats > S32_MAX / sizeof(u64))
1929 return -ENOMEM;
1930 WARN_ON_ONCE(!n_stats);
1931 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1932 return -EFAULT;
1933
1934 stats.n_stats = n_stats;
1935 if (n_stats) {
1936 data = vzalloc(n_stats * sizeof(u64));
1937 if (!data)
1938 return -ENOMEM;
1939 ops->get_ethtool_stats(dev, &stats, data);
1940 } else {
1941 data = NULL;
1942 }
1943
1944 ret = -EFAULT;
1945 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1946 goto out;
1947 useraddr += sizeof(stats);
1948 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1949 goto out;
1950 ret = 0;
1951
1952 out:
1953 vfree(data);
1954 return ret;
1955 }
1956
ethtool_get_phy_stats(struct net_device * dev,void __user * useraddr)1957 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1958 {
1959 struct ethtool_stats stats;
1960 struct phy_device *phydev = dev->phydev;
1961 u64 *data;
1962 int ret, n_stats;
1963
1964 if (!phydev)
1965 return -EOPNOTSUPP;
1966
1967 n_stats = phy_get_sset_count(phydev);
1968 if (n_stats < 0)
1969 return n_stats;
1970 if (n_stats > S32_MAX / sizeof(u64))
1971 return -ENOMEM;
1972 WARN_ON_ONCE(!n_stats);
1973
1974 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1975 return -EFAULT;
1976
1977 stats.n_stats = n_stats;
1978 if (n_stats) {
1979 data = vzalloc(n_stats * sizeof(u64));
1980 if (!data)
1981 return -ENOMEM;
1982
1983 mutex_lock(&phydev->lock);
1984 phydev->drv->get_stats(phydev, &stats, data);
1985 mutex_unlock(&phydev->lock);
1986 } else {
1987 data = NULL;
1988 }
1989
1990 ret = -EFAULT;
1991 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1992 goto out;
1993 useraddr += sizeof(stats);
1994 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1995 goto out;
1996 ret = 0;
1997
1998 out:
1999 vfree(data);
2000 return ret;
2001 }
2002
ethtool_get_perm_addr(struct net_device * dev,void __user * useraddr)2003 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2004 {
2005 struct ethtool_perm_addr epaddr;
2006
2007 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2008 return -EFAULT;
2009
2010 if (epaddr.size < dev->addr_len)
2011 return -ETOOSMALL;
2012 epaddr.size = dev->addr_len;
2013
2014 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2015 return -EFAULT;
2016 useraddr += sizeof(epaddr);
2017 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2018 return -EFAULT;
2019 return 0;
2020 }
2021
ethtool_get_value(struct net_device * dev,char __user * useraddr,u32 cmd,u32 (* actor)(struct net_device *))2022 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2023 u32 cmd, u32 (*actor)(struct net_device *))
2024 {
2025 struct ethtool_value edata = { .cmd = cmd };
2026
2027 if (!actor)
2028 return -EOPNOTSUPP;
2029
2030 edata.data = actor(dev);
2031
2032 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2033 return -EFAULT;
2034 return 0;
2035 }
2036
ethtool_set_value_void(struct net_device * dev,char __user * useraddr,void (* actor)(struct net_device *,u32))2037 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2038 void (*actor)(struct net_device *, u32))
2039 {
2040 struct ethtool_value edata;
2041
2042 if (!actor)
2043 return -EOPNOTSUPP;
2044
2045 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2046 return -EFAULT;
2047
2048 actor(dev, edata.data);
2049 return 0;
2050 }
2051
ethtool_set_value(struct net_device * dev,char __user * useraddr,int (* actor)(struct net_device *,u32))2052 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2053 int (*actor)(struct net_device *, u32))
2054 {
2055 struct ethtool_value edata;
2056
2057 if (!actor)
2058 return -EOPNOTSUPP;
2059
2060 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2061 return -EFAULT;
2062
2063 return actor(dev, edata.data);
2064 }
2065
ethtool_flash_device(struct net_device * dev,char __user * useraddr)2066 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2067 char __user *useraddr)
2068 {
2069 struct ethtool_flash efl;
2070
2071 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2072 return -EFAULT;
2073
2074 if (!dev->ethtool_ops->flash_device)
2075 return -EOPNOTSUPP;
2076
2077 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2078
2079 return dev->ethtool_ops->flash_device(dev, &efl);
2080 }
2081
ethtool_set_dump(struct net_device * dev,void __user * useraddr)2082 static int ethtool_set_dump(struct net_device *dev,
2083 void __user *useraddr)
2084 {
2085 struct ethtool_dump dump;
2086
2087 if (!dev->ethtool_ops->set_dump)
2088 return -EOPNOTSUPP;
2089
2090 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2091 return -EFAULT;
2092
2093 return dev->ethtool_ops->set_dump(dev, &dump);
2094 }
2095
ethtool_get_dump_flag(struct net_device * dev,void __user * useraddr)2096 static int ethtool_get_dump_flag(struct net_device *dev,
2097 void __user *useraddr)
2098 {
2099 int ret;
2100 struct ethtool_dump dump;
2101 const struct ethtool_ops *ops = dev->ethtool_ops;
2102
2103 if (!ops->get_dump_flag)
2104 return -EOPNOTSUPP;
2105
2106 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2107 return -EFAULT;
2108
2109 ret = ops->get_dump_flag(dev, &dump);
2110 if (ret)
2111 return ret;
2112
2113 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2114 return -EFAULT;
2115 return 0;
2116 }
2117
ethtool_get_dump_data(struct net_device * dev,void __user * useraddr)2118 static int ethtool_get_dump_data(struct net_device *dev,
2119 void __user *useraddr)
2120 {
2121 int ret;
2122 __u32 len;
2123 struct ethtool_dump dump, tmp;
2124 const struct ethtool_ops *ops = dev->ethtool_ops;
2125 void *data = NULL;
2126
2127 if (!ops->get_dump_data || !ops->get_dump_flag)
2128 return -EOPNOTSUPP;
2129
2130 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2131 return -EFAULT;
2132
2133 memset(&tmp, 0, sizeof(tmp));
2134 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2135 ret = ops->get_dump_flag(dev, &tmp);
2136 if (ret)
2137 return ret;
2138
2139 len = min(tmp.len, dump.len);
2140 if (!len)
2141 return -EFAULT;
2142
2143 /* Don't ever let the driver think there's more space available
2144 * than it requested with .get_dump_flag().
2145 */
2146 dump.len = len;
2147
2148 /* Always allocate enough space to hold the whole thing so that the
2149 * driver does not need to check the length and bother with partial
2150 * dumping.
2151 */
2152 data = vzalloc(tmp.len);
2153 if (!data)
2154 return -ENOMEM;
2155 ret = ops->get_dump_data(dev, &dump, data);
2156 if (ret)
2157 goto out;
2158
2159 /* There are two sane possibilities:
2160 * 1. The driver's .get_dump_data() does not touch dump.len.
2161 * 2. Or it may set dump.len to how much it really writes, which
2162 * should be tmp.len (or len if it can do a partial dump).
2163 * In any case respond to userspace with the actual length of data
2164 * it's receiving.
2165 */
2166 WARN_ON(dump.len != len && dump.len != tmp.len);
2167 dump.len = len;
2168
2169 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2170 ret = -EFAULT;
2171 goto out;
2172 }
2173 useraddr += offsetof(struct ethtool_dump, data);
2174 if (copy_to_user(useraddr, data, len))
2175 ret = -EFAULT;
2176 out:
2177 vfree(data);
2178 return ret;
2179 }
2180
ethtool_get_ts_info(struct net_device * dev,void __user * useraddr)2181 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2182 {
2183 int err = 0;
2184 struct ethtool_ts_info info;
2185 const struct ethtool_ops *ops = dev->ethtool_ops;
2186 struct phy_device *phydev = dev->phydev;
2187
2188 memset(&info, 0, sizeof(info));
2189 info.cmd = ETHTOOL_GET_TS_INFO;
2190
2191 if (phydev && phydev->drv && phydev->drv->ts_info) {
2192 err = phydev->drv->ts_info(phydev, &info);
2193 } else if (ops->get_ts_info) {
2194 err = ops->get_ts_info(dev, &info);
2195 } else {
2196 info.so_timestamping =
2197 SOF_TIMESTAMPING_RX_SOFTWARE |
2198 SOF_TIMESTAMPING_SOFTWARE;
2199 info.phc_index = -1;
2200 }
2201
2202 if (err)
2203 return err;
2204
2205 if (copy_to_user(useraddr, &info, sizeof(info)))
2206 err = -EFAULT;
2207
2208 return err;
2209 }
2210
__ethtool_get_module_info(struct net_device * dev,struct ethtool_modinfo * modinfo)2211 static int __ethtool_get_module_info(struct net_device *dev,
2212 struct ethtool_modinfo *modinfo)
2213 {
2214 const struct ethtool_ops *ops = dev->ethtool_ops;
2215 struct phy_device *phydev = dev->phydev;
2216
2217 if (phydev && phydev->drv && phydev->drv->module_info)
2218 return phydev->drv->module_info(phydev, modinfo);
2219
2220 if (ops->get_module_info)
2221 return ops->get_module_info(dev, modinfo);
2222
2223 return -EOPNOTSUPP;
2224 }
2225
ethtool_get_module_info(struct net_device * dev,void __user * useraddr)2226 static int ethtool_get_module_info(struct net_device *dev,
2227 void __user *useraddr)
2228 {
2229 int ret;
2230 struct ethtool_modinfo modinfo;
2231
2232 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2233 return -EFAULT;
2234
2235 ret = __ethtool_get_module_info(dev, &modinfo);
2236 if (ret)
2237 return ret;
2238
2239 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2240 return -EFAULT;
2241
2242 return 0;
2243 }
2244
__ethtool_get_module_eeprom(struct net_device * dev,struct ethtool_eeprom * ee,u8 * data)2245 static int __ethtool_get_module_eeprom(struct net_device *dev,
2246 struct ethtool_eeprom *ee, u8 *data)
2247 {
2248 const struct ethtool_ops *ops = dev->ethtool_ops;
2249 struct phy_device *phydev = dev->phydev;
2250
2251 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2252 return phydev->drv->module_eeprom(phydev, ee, data);
2253
2254 if (ops->get_module_eeprom)
2255 return ops->get_module_eeprom(dev, ee, data);
2256
2257 return -EOPNOTSUPP;
2258 }
2259
ethtool_get_module_eeprom(struct net_device * dev,void __user * useraddr)2260 static int ethtool_get_module_eeprom(struct net_device *dev,
2261 void __user *useraddr)
2262 {
2263 int ret;
2264 struct ethtool_modinfo modinfo;
2265
2266 ret = __ethtool_get_module_info(dev, &modinfo);
2267 if (ret)
2268 return ret;
2269
2270 return ethtool_get_any_eeprom(dev, useraddr,
2271 __ethtool_get_module_eeprom,
2272 modinfo.eeprom_len);
2273 }
2274
ethtool_tunable_valid(const struct ethtool_tunable * tuna)2275 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2276 {
2277 switch (tuna->id) {
2278 case ETHTOOL_RX_COPYBREAK:
2279 case ETHTOOL_TX_COPYBREAK:
2280 if (tuna->len != sizeof(u32) ||
2281 tuna->type_id != ETHTOOL_TUNABLE_U32)
2282 return -EINVAL;
2283 break;
2284 default:
2285 return -EINVAL;
2286 }
2287
2288 return 0;
2289 }
2290
ethtool_get_tunable(struct net_device * dev,void __user * useraddr)2291 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2292 {
2293 int ret;
2294 struct ethtool_tunable tuna;
2295 const struct ethtool_ops *ops = dev->ethtool_ops;
2296 void *data;
2297
2298 if (!ops->get_tunable)
2299 return -EOPNOTSUPP;
2300 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2301 return -EFAULT;
2302 ret = ethtool_tunable_valid(&tuna);
2303 if (ret)
2304 return ret;
2305 data = kmalloc(tuna.len, GFP_USER);
2306 if (!data)
2307 return -ENOMEM;
2308 ret = ops->get_tunable(dev, &tuna, data);
2309 if (ret)
2310 goto out;
2311 useraddr += sizeof(tuna);
2312 ret = -EFAULT;
2313 if (copy_to_user(useraddr, data, tuna.len))
2314 goto out;
2315 ret = 0;
2316
2317 out:
2318 kfree(data);
2319 return ret;
2320 }
2321
ethtool_set_tunable(struct net_device * dev,void __user * useraddr)2322 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2323 {
2324 int ret;
2325 struct ethtool_tunable tuna;
2326 const struct ethtool_ops *ops = dev->ethtool_ops;
2327 void *data;
2328
2329 if (!ops->set_tunable)
2330 return -EOPNOTSUPP;
2331 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2332 return -EFAULT;
2333 ret = ethtool_tunable_valid(&tuna);
2334 if (ret)
2335 return ret;
2336 useraddr += sizeof(tuna);
2337 data = memdup_user(useraddr, tuna.len);
2338 if (IS_ERR(data))
2339 return PTR_ERR(data);
2340 ret = ops->set_tunable(dev, &tuna, data);
2341
2342 kfree(data);
2343 return ret;
2344 }
2345
2346 static noinline_for_stack int
ethtool_get_per_queue_coalesce(struct net_device * dev,void __user * useraddr,struct ethtool_per_queue_op * per_queue_opt)2347 ethtool_get_per_queue_coalesce(struct net_device *dev,
2348 void __user *useraddr,
2349 struct ethtool_per_queue_op *per_queue_opt)
2350 {
2351 u32 bit;
2352 int ret;
2353 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2354
2355 if (!dev->ethtool_ops->get_per_queue_coalesce)
2356 return -EOPNOTSUPP;
2357
2358 useraddr += sizeof(*per_queue_opt);
2359
2360 bitmap_from_u32array(queue_mask,
2361 MAX_NUM_QUEUE,
2362 per_queue_opt->queue_mask,
2363 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2364
2365 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2366 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2367
2368 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2369 if (ret != 0)
2370 return ret;
2371 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2372 return -EFAULT;
2373 useraddr += sizeof(coalesce);
2374 }
2375
2376 return 0;
2377 }
2378
2379 static noinline_for_stack int
ethtool_set_per_queue_coalesce(struct net_device * dev,void __user * useraddr,struct ethtool_per_queue_op * per_queue_opt)2380 ethtool_set_per_queue_coalesce(struct net_device *dev,
2381 void __user *useraddr,
2382 struct ethtool_per_queue_op *per_queue_opt)
2383 {
2384 u32 bit;
2385 int i, ret = 0;
2386 int n_queue;
2387 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2388 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2389
2390 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2391 (!dev->ethtool_ops->get_per_queue_coalesce))
2392 return -EOPNOTSUPP;
2393
2394 useraddr += sizeof(*per_queue_opt);
2395
2396 bitmap_from_u32array(queue_mask,
2397 MAX_NUM_QUEUE,
2398 per_queue_opt->queue_mask,
2399 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2400 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2401 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2402 if (!backup)
2403 return -ENOMEM;
2404
2405 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2406 struct ethtool_coalesce coalesce;
2407
2408 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2409 if (ret != 0)
2410 goto roll_back;
2411
2412 tmp++;
2413
2414 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2415 ret = -EFAULT;
2416 goto roll_back;
2417 }
2418
2419 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2420 if (ret != 0)
2421 goto roll_back;
2422
2423 useraddr += sizeof(coalesce);
2424 }
2425
2426 roll_back:
2427 if (ret != 0) {
2428 tmp = backup;
2429 for_each_set_bit(i, queue_mask, bit) {
2430 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2431 tmp++;
2432 }
2433 }
2434 kfree(backup);
2435
2436 return ret;
2437 }
2438
ethtool_set_per_queue(struct net_device * dev,void __user * useraddr,u32 sub_cmd)2439 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2440 void __user *useraddr, u32 sub_cmd)
2441 {
2442 struct ethtool_per_queue_op per_queue_opt;
2443
2444 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2445 return -EFAULT;
2446
2447 if (per_queue_opt.sub_command != sub_cmd)
2448 return -EINVAL;
2449
2450 switch (per_queue_opt.sub_command) {
2451 case ETHTOOL_GCOALESCE:
2452 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2453 case ETHTOOL_SCOALESCE:
2454 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2455 default:
2456 return -EOPNOTSUPP;
2457 };
2458 }
2459
ethtool_phy_tunable_valid(const struct ethtool_tunable * tuna)2460 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2461 {
2462 switch (tuna->id) {
2463 case ETHTOOL_PHY_DOWNSHIFT:
2464 if (tuna->len != sizeof(u8) ||
2465 tuna->type_id != ETHTOOL_TUNABLE_U8)
2466 return -EINVAL;
2467 break;
2468 default:
2469 return -EINVAL;
2470 }
2471
2472 return 0;
2473 }
2474
get_phy_tunable(struct net_device * dev,void __user * useraddr)2475 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2476 {
2477 int ret;
2478 struct ethtool_tunable tuna;
2479 struct phy_device *phydev = dev->phydev;
2480 void *data;
2481
2482 if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2483 return -EOPNOTSUPP;
2484
2485 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2486 return -EFAULT;
2487 ret = ethtool_phy_tunable_valid(&tuna);
2488 if (ret)
2489 return ret;
2490 data = kmalloc(tuna.len, GFP_USER);
2491 if (!data)
2492 return -ENOMEM;
2493 mutex_lock(&phydev->lock);
2494 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2495 mutex_unlock(&phydev->lock);
2496 if (ret)
2497 goto out;
2498 useraddr += sizeof(tuna);
2499 ret = -EFAULT;
2500 if (copy_to_user(useraddr, data, tuna.len))
2501 goto out;
2502 ret = 0;
2503
2504 out:
2505 kfree(data);
2506 return ret;
2507 }
2508
set_phy_tunable(struct net_device * dev,void __user * useraddr)2509 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2510 {
2511 int ret;
2512 struct ethtool_tunable tuna;
2513 struct phy_device *phydev = dev->phydev;
2514 void *data;
2515
2516 if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2517 return -EOPNOTSUPP;
2518 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2519 return -EFAULT;
2520 ret = ethtool_phy_tunable_valid(&tuna);
2521 if (ret)
2522 return ret;
2523 useraddr += sizeof(tuna);
2524 data = memdup_user(useraddr, tuna.len);
2525 if (IS_ERR(data))
2526 return PTR_ERR(data);
2527 mutex_lock(&phydev->lock);
2528 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2529 mutex_unlock(&phydev->lock);
2530
2531 kfree(data);
2532 return ret;
2533 }
2534
ethtool_get_fecparam(struct net_device * dev,void __user * useraddr)2535 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2536 {
2537 struct ethtool_fecparam fecparam = { ETHTOOL_GFECPARAM };
2538 int rc;
2539
2540 if (!dev->ethtool_ops->get_fecparam)
2541 return -EOPNOTSUPP;
2542
2543 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2544 if (rc)
2545 return rc;
2546
2547 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2548 return -EFAULT;
2549 return 0;
2550 }
2551
ethtool_set_fecparam(struct net_device * dev,void __user * useraddr)2552 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2553 {
2554 struct ethtool_fecparam fecparam;
2555
2556 if (!dev->ethtool_ops->set_fecparam)
2557 return -EOPNOTSUPP;
2558
2559 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2560 return -EFAULT;
2561
2562 return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2563 }
2564
2565 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
2566
dev_ethtool(struct net * net,struct ifreq * ifr)2567 int dev_ethtool(struct net *net, struct ifreq *ifr)
2568 {
2569 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2570 void __user *useraddr = ifr->ifr_data;
2571 u32 ethcmd, sub_cmd;
2572 int rc;
2573 netdev_features_t old_features;
2574
2575 if (!dev || !netif_device_present(dev))
2576 return -ENODEV;
2577
2578 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
2579 return -EFAULT;
2580
2581 if (ethcmd == ETHTOOL_PERQUEUE) {
2582 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2583 return -EFAULT;
2584 } else {
2585 sub_cmd = ethcmd;
2586 }
2587 /* Allow some commands to be done by anyone */
2588 switch (sub_cmd) {
2589 case ETHTOOL_GSET:
2590 case ETHTOOL_GDRVINFO:
2591 case ETHTOOL_GMSGLVL:
2592 case ETHTOOL_GLINK:
2593 case ETHTOOL_GCOALESCE:
2594 case ETHTOOL_GRINGPARAM:
2595 case ETHTOOL_GPAUSEPARAM:
2596 case ETHTOOL_GRXCSUM:
2597 case ETHTOOL_GTXCSUM:
2598 case ETHTOOL_GSG:
2599 case ETHTOOL_GSSET_INFO:
2600 case ETHTOOL_GSTRINGS:
2601 case ETHTOOL_GSTATS:
2602 case ETHTOOL_GPHYSTATS:
2603 case ETHTOOL_GTSO:
2604 case ETHTOOL_GPERMADDR:
2605 case ETHTOOL_GUFO:
2606 case ETHTOOL_GGSO:
2607 case ETHTOOL_GGRO:
2608 case ETHTOOL_GFLAGS:
2609 case ETHTOOL_GPFLAGS:
2610 case ETHTOOL_GRXFH:
2611 case ETHTOOL_GRXRINGS:
2612 case ETHTOOL_GRXCLSRLCNT:
2613 case ETHTOOL_GRXCLSRULE:
2614 case ETHTOOL_GRXCLSRLALL:
2615 case ETHTOOL_GRXFHINDIR:
2616 case ETHTOOL_GRSSH:
2617 case ETHTOOL_GFEATURES:
2618 case ETHTOOL_GCHANNELS:
2619 case ETHTOOL_GET_TS_INFO:
2620 case ETHTOOL_GEEE:
2621 case ETHTOOL_GTUNABLE:
2622 case ETHTOOL_PHY_GTUNABLE:
2623 case ETHTOOL_GLINKSETTINGS:
2624 case ETHTOOL_GFECPARAM:
2625 break;
2626 default:
2627 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2628 return -EPERM;
2629 }
2630
2631 if (dev->ethtool_ops->begin) {
2632 rc = dev->ethtool_ops->begin(dev);
2633 if (rc < 0)
2634 return rc;
2635 }
2636 old_features = dev->features;
2637
2638 switch (ethcmd) {
2639 case ETHTOOL_GSET:
2640 rc = ethtool_get_settings(dev, useraddr);
2641 break;
2642 case ETHTOOL_SSET:
2643 rc = ethtool_set_settings(dev, useraddr);
2644 break;
2645 case ETHTOOL_GDRVINFO:
2646 rc = ethtool_get_drvinfo(dev, useraddr);
2647 break;
2648 case ETHTOOL_GREGS:
2649 rc = ethtool_get_regs(dev, useraddr);
2650 break;
2651 case ETHTOOL_GWOL:
2652 rc = ethtool_get_wol(dev, useraddr);
2653 break;
2654 case ETHTOOL_SWOL:
2655 rc = ethtool_set_wol(dev, useraddr);
2656 break;
2657 case ETHTOOL_GMSGLVL:
2658 rc = ethtool_get_value(dev, useraddr, ethcmd,
2659 dev->ethtool_ops->get_msglevel);
2660 break;
2661 case ETHTOOL_SMSGLVL:
2662 rc = ethtool_set_value_void(dev, useraddr,
2663 dev->ethtool_ops->set_msglevel);
2664 break;
2665 case ETHTOOL_GEEE:
2666 rc = ethtool_get_eee(dev, useraddr);
2667 break;
2668 case ETHTOOL_SEEE:
2669 rc = ethtool_set_eee(dev, useraddr);
2670 break;
2671 case ETHTOOL_NWAY_RST:
2672 rc = ethtool_nway_reset(dev);
2673 break;
2674 case ETHTOOL_GLINK:
2675 rc = ethtool_get_link(dev, useraddr);
2676 break;
2677 case ETHTOOL_GEEPROM:
2678 rc = ethtool_get_eeprom(dev, useraddr);
2679 break;
2680 case ETHTOOL_SEEPROM:
2681 rc = ethtool_set_eeprom(dev, useraddr);
2682 break;
2683 case ETHTOOL_GCOALESCE:
2684 rc = ethtool_get_coalesce(dev, useraddr);
2685 break;
2686 case ETHTOOL_SCOALESCE:
2687 rc = ethtool_set_coalesce(dev, useraddr);
2688 break;
2689 case ETHTOOL_GRINGPARAM:
2690 rc = ethtool_get_ringparam(dev, useraddr);
2691 break;
2692 case ETHTOOL_SRINGPARAM:
2693 rc = ethtool_set_ringparam(dev, useraddr);
2694 break;
2695 case ETHTOOL_GPAUSEPARAM:
2696 rc = ethtool_get_pauseparam(dev, useraddr);
2697 break;
2698 case ETHTOOL_SPAUSEPARAM:
2699 rc = ethtool_set_pauseparam(dev, useraddr);
2700 break;
2701 case ETHTOOL_TEST:
2702 rc = ethtool_self_test(dev, useraddr);
2703 break;
2704 case ETHTOOL_GSTRINGS:
2705 rc = ethtool_get_strings(dev, useraddr);
2706 break;
2707 case ETHTOOL_PHYS_ID:
2708 rc = ethtool_phys_id(dev, useraddr);
2709 break;
2710 case ETHTOOL_GSTATS:
2711 rc = ethtool_get_stats(dev, useraddr);
2712 break;
2713 case ETHTOOL_GPERMADDR:
2714 rc = ethtool_get_perm_addr(dev, useraddr);
2715 break;
2716 case ETHTOOL_GFLAGS:
2717 rc = ethtool_get_value(dev, useraddr, ethcmd,
2718 __ethtool_get_flags);
2719 break;
2720 case ETHTOOL_SFLAGS:
2721 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2722 break;
2723 case ETHTOOL_GPFLAGS:
2724 rc = ethtool_get_value(dev, useraddr, ethcmd,
2725 dev->ethtool_ops->get_priv_flags);
2726 break;
2727 case ETHTOOL_SPFLAGS:
2728 rc = ethtool_set_value(dev, useraddr,
2729 dev->ethtool_ops->set_priv_flags);
2730 break;
2731 case ETHTOOL_GRXFH:
2732 case ETHTOOL_GRXRINGS:
2733 case ETHTOOL_GRXCLSRLCNT:
2734 case ETHTOOL_GRXCLSRULE:
2735 case ETHTOOL_GRXCLSRLALL:
2736 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2737 break;
2738 case ETHTOOL_SRXFH:
2739 case ETHTOOL_SRXCLSRLDEL:
2740 case ETHTOOL_SRXCLSRLINS:
2741 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2742 break;
2743 case ETHTOOL_FLASHDEV:
2744 rc = ethtool_flash_device(dev, useraddr);
2745 break;
2746 case ETHTOOL_RESET:
2747 rc = ethtool_reset(dev, useraddr);
2748 break;
2749 case ETHTOOL_GSSET_INFO:
2750 rc = ethtool_get_sset_info(dev, useraddr);
2751 break;
2752 case ETHTOOL_GRXFHINDIR:
2753 rc = ethtool_get_rxfh_indir(dev, useraddr);
2754 break;
2755 case ETHTOOL_SRXFHINDIR:
2756 rc = ethtool_set_rxfh_indir(dev, useraddr);
2757 break;
2758 case ETHTOOL_GRSSH:
2759 rc = ethtool_get_rxfh(dev, useraddr);
2760 break;
2761 case ETHTOOL_SRSSH:
2762 rc = ethtool_set_rxfh(dev, useraddr);
2763 break;
2764 case ETHTOOL_GFEATURES:
2765 rc = ethtool_get_features(dev, useraddr);
2766 break;
2767 case ETHTOOL_SFEATURES:
2768 rc = ethtool_set_features(dev, useraddr);
2769 break;
2770 case ETHTOOL_GTXCSUM:
2771 case ETHTOOL_GRXCSUM:
2772 case ETHTOOL_GSG:
2773 case ETHTOOL_GTSO:
2774 case ETHTOOL_GGSO:
2775 case ETHTOOL_GGRO:
2776 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2777 break;
2778 case ETHTOOL_STXCSUM:
2779 case ETHTOOL_SRXCSUM:
2780 case ETHTOOL_SSG:
2781 case ETHTOOL_STSO:
2782 case ETHTOOL_SGSO:
2783 case ETHTOOL_SGRO:
2784 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2785 break;
2786 case ETHTOOL_GCHANNELS:
2787 rc = ethtool_get_channels(dev, useraddr);
2788 break;
2789 case ETHTOOL_SCHANNELS:
2790 rc = ethtool_set_channels(dev, useraddr);
2791 break;
2792 case ETHTOOL_SET_DUMP:
2793 rc = ethtool_set_dump(dev, useraddr);
2794 break;
2795 case ETHTOOL_GET_DUMP_FLAG:
2796 rc = ethtool_get_dump_flag(dev, useraddr);
2797 break;
2798 case ETHTOOL_GET_DUMP_DATA:
2799 rc = ethtool_get_dump_data(dev, useraddr);
2800 break;
2801 case ETHTOOL_GET_TS_INFO:
2802 rc = ethtool_get_ts_info(dev, useraddr);
2803 break;
2804 case ETHTOOL_GMODULEINFO:
2805 rc = ethtool_get_module_info(dev, useraddr);
2806 break;
2807 case ETHTOOL_GMODULEEEPROM:
2808 rc = ethtool_get_module_eeprom(dev, useraddr);
2809 break;
2810 case ETHTOOL_GTUNABLE:
2811 rc = ethtool_get_tunable(dev, useraddr);
2812 break;
2813 case ETHTOOL_STUNABLE:
2814 rc = ethtool_set_tunable(dev, useraddr);
2815 break;
2816 case ETHTOOL_GPHYSTATS:
2817 rc = ethtool_get_phy_stats(dev, useraddr);
2818 break;
2819 case ETHTOOL_PERQUEUE:
2820 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2821 break;
2822 case ETHTOOL_GLINKSETTINGS:
2823 rc = ethtool_get_link_ksettings(dev, useraddr);
2824 break;
2825 case ETHTOOL_SLINKSETTINGS:
2826 rc = ethtool_set_link_ksettings(dev, useraddr);
2827 break;
2828 case ETHTOOL_PHY_GTUNABLE:
2829 rc = get_phy_tunable(dev, useraddr);
2830 break;
2831 case ETHTOOL_PHY_STUNABLE:
2832 rc = set_phy_tunable(dev, useraddr);
2833 break;
2834 case ETHTOOL_GFECPARAM:
2835 rc = ethtool_get_fecparam(dev, useraddr);
2836 break;
2837 case ETHTOOL_SFECPARAM:
2838 rc = ethtool_set_fecparam(dev, useraddr);
2839 break;
2840 default:
2841 rc = -EOPNOTSUPP;
2842 }
2843
2844 if (dev->ethtool_ops->complete)
2845 dev->ethtool_ops->complete(dev);
2846
2847 if (old_features != dev->features)
2848 netdev_features_change(dev);
2849
2850 return rc;
2851 }
2852