1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * net/core/ethtool.c - Ethtool ioctl handler
4 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
5 *
6 * This file is where we call all the ethtool_ops commands to get
7 * the information ethtool needs.
8 */
9
10 #include <linux/compat.h>
11 #include <linux/module.h>
12 #include <linux/types.h>
13 #include <linux/capability.h>
14 #include <linux/errno.h>
15 #include <linux/ethtool.h>
16 #include <linux/netdevice.h>
17 #include <linux/net_tstamp.h>
18 #include <linux/phy.h>
19 #include <linux/bitops.h>
20 #include <linux/uaccess.h>
21 #include <linux/vmalloc.h>
22 #include <linux/sfp.h>
23 #include <linux/slab.h>
24 #include <linux/rtnetlink.h>
25 #include <linux/sched/signal.h>
26 #include <linux/net.h>
27 #include <net/devlink.h>
28 #include <net/xdp_sock_drv.h>
29 #include <net/flow_offload.h>
30 #include <linux/ethtool_netlink.h>
31 #include <generated/utsrelease.h>
32 #include "common.h"
33
34 /*
35 * Some useful ethtool_ops methods that're device independent.
36 * If we find that all drivers want to do the same thing here,
37 * we can turn these into dev_() function calls.
38 */
39
ethtool_op_get_link(struct net_device *dev)40 u32 ethtool_op_get_link(struct net_device *dev)
41 {
42 return netif_carrier_ok(dev) ? 1 : 0;
43 }
44 EXPORT_SYMBOL(ethtool_op_get_link);
45
ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)46 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
47 {
48 info->so_timestamping =
49 SOF_TIMESTAMPING_TX_SOFTWARE |
50 SOF_TIMESTAMPING_RX_SOFTWARE |
51 SOF_TIMESTAMPING_SOFTWARE;
52 info->phc_index = -1;
53 return 0;
54 }
55 EXPORT_SYMBOL(ethtool_op_get_ts_info);
56
57 /* Handlers for each ethtool command */
58
ethtool_get_features(struct net_device *dev, void __user *useraddr)59 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
60 {
61 struct ethtool_gfeatures cmd = {
62 .cmd = ETHTOOL_GFEATURES,
63 .size = ETHTOOL_DEV_FEATURE_WORDS,
64 };
65 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
66 u32 __user *sizeaddr;
67 u32 copy_size;
68 int i;
69
70 /* in case feature bits run out again */
71 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
72
73 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
74 features[i].available = (u32)(dev->hw_features >> (32 * i));
75 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
76 features[i].active = (u32)(dev->features >> (32 * i));
77 features[i].never_changed =
78 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
79 }
80
81 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
82 if (get_user(copy_size, sizeaddr))
83 return -EFAULT;
84
85 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
86 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
87
88 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
89 return -EFAULT;
90 useraddr += sizeof(cmd);
91 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
92 return -EFAULT;
93
94 return 0;
95 }
96
ethtool_set_features(struct net_device *dev, void __user *useraddr)97 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
98 {
99 struct ethtool_sfeatures cmd;
100 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
101 netdev_features_t wanted = 0, valid = 0;
102 int i, ret = 0;
103
104 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
105 return -EFAULT;
106 useraddr += sizeof(cmd);
107
108 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
109 return -EINVAL;
110
111 if (copy_from_user(features, useraddr, sizeof(features)))
112 return -EFAULT;
113
114 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
115 valid |= (netdev_features_t)features[i].valid << (32 * i);
116 wanted |= (netdev_features_t)features[i].requested << (32 * i);
117 }
118
119 if (valid & ~NETIF_F_ETHTOOL_BITS)
120 return -EINVAL;
121
122 if (valid & ~dev->hw_features) {
123 valid &= dev->hw_features;
124 ret |= ETHTOOL_F_UNSUPPORTED;
125 }
126
127 dev->wanted_features &= ~valid;
128 dev->wanted_features |= wanted & valid;
129 __netdev_update_features(dev);
130
131 if ((dev->wanted_features ^ dev->features) & valid)
132 ret |= ETHTOOL_F_WISH;
133
134 return ret;
135 }
136
__ethtool_get_sset_count(struct net_device *dev, int sset)137 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
138 {
139 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
140 const struct ethtool_ops *ops = dev->ethtool_ops;
141
142 if (sset == ETH_SS_FEATURES)
143 return ARRAY_SIZE(netdev_features_strings);
144
145 if (sset == ETH_SS_RSS_HASH_FUNCS)
146 return ARRAY_SIZE(rss_hash_func_strings);
147
148 if (sset == ETH_SS_TUNABLES)
149 return ARRAY_SIZE(tunable_strings);
150
151 if (sset == ETH_SS_PHY_TUNABLES)
152 return ARRAY_SIZE(phy_tunable_strings);
153
154 if (sset == ETH_SS_PHY_STATS && dev->phydev &&
155 !ops->get_ethtool_phy_stats &&
156 phy_ops && phy_ops->get_sset_count)
157 return phy_ops->get_sset_count(dev->phydev);
158
159 if (sset == ETH_SS_LINK_MODES)
160 return __ETHTOOL_LINK_MODE_MASK_NBITS;
161
162 if (ops->get_sset_count && ops->get_strings)
163 return ops->get_sset_count(dev, sset);
164 else
165 return -EOPNOTSUPP;
166 }
167
__ethtool_get_strings(struct net_device *dev, u32 stringset, u8 *data)168 static void __ethtool_get_strings(struct net_device *dev,
169 u32 stringset, u8 *data)
170 {
171 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
172 const struct ethtool_ops *ops = dev->ethtool_ops;
173
174 if (stringset == ETH_SS_FEATURES)
175 memcpy(data, netdev_features_strings,
176 sizeof(netdev_features_strings));
177 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
178 memcpy(data, rss_hash_func_strings,
179 sizeof(rss_hash_func_strings));
180 else if (stringset == ETH_SS_TUNABLES)
181 memcpy(data, tunable_strings, sizeof(tunable_strings));
182 else if (stringset == ETH_SS_PHY_TUNABLES)
183 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
184 else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
185 !ops->get_ethtool_phy_stats && phy_ops &&
186 phy_ops->get_strings)
187 phy_ops->get_strings(dev->phydev, data);
188 else if (stringset == ETH_SS_LINK_MODES)
189 memcpy(data, link_mode_names,
190 __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
191 else
192 /* ops->get_strings is valid because checked earlier */
193 ops->get_strings(dev, stringset, data);
194 }
195
ethtool_get_feature_mask(u32 eth_cmd)196 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
197 {
198 /* feature masks of legacy discrete ethtool ops */
199
200 switch (eth_cmd) {
201 case ETHTOOL_GTXCSUM:
202 case ETHTOOL_STXCSUM:
203 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
204 NETIF_F_SCTP_CRC;
205 case ETHTOOL_GRXCSUM:
206 case ETHTOOL_SRXCSUM:
207 return NETIF_F_RXCSUM;
208 case ETHTOOL_GSG:
209 case ETHTOOL_SSG:
210 return NETIF_F_SG | NETIF_F_FRAGLIST;
211 case ETHTOOL_GTSO:
212 case ETHTOOL_STSO:
213 return NETIF_F_ALL_TSO;
214 case ETHTOOL_GGSO:
215 case ETHTOOL_SGSO:
216 return NETIF_F_GSO;
217 case ETHTOOL_GGRO:
218 case ETHTOOL_SGRO:
219 return NETIF_F_GRO;
220 default:
221 BUG();
222 }
223 }
224
ethtool_get_one_feature(struct net_device *dev, char __user *useraddr, u32 ethcmd)225 static int ethtool_get_one_feature(struct net_device *dev,
226 char __user *useraddr, u32 ethcmd)
227 {
228 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
229 struct ethtool_value edata = {
230 .cmd = ethcmd,
231 .data = !!(dev->features & mask),
232 };
233
234 if (copy_to_user(useraddr, &edata, sizeof(edata)))
235 return -EFAULT;
236 return 0;
237 }
238
ethtool_set_one_feature(struct net_device *dev, void __user *useraddr, u32 ethcmd)239 static int ethtool_set_one_feature(struct net_device *dev,
240 void __user *useraddr, u32 ethcmd)
241 {
242 struct ethtool_value edata;
243 netdev_features_t mask;
244
245 if (copy_from_user(&edata, useraddr, sizeof(edata)))
246 return -EFAULT;
247
248 mask = ethtool_get_feature_mask(ethcmd);
249 mask &= dev->hw_features;
250 if (!mask)
251 return -EOPNOTSUPP;
252
253 if (edata.data)
254 dev->wanted_features |= mask;
255 else
256 dev->wanted_features &= ~mask;
257
258 __netdev_update_features(dev);
259
260 return 0;
261 }
262
263 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
264 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
265 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
266 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
267 NETIF_F_RXHASH)
268
__ethtool_get_flags(struct net_device *dev)269 static u32 __ethtool_get_flags(struct net_device *dev)
270 {
271 u32 flags = 0;
272
273 if (dev->features & NETIF_F_LRO)
274 flags |= ETH_FLAG_LRO;
275 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
276 flags |= ETH_FLAG_RXVLAN;
277 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
278 flags |= ETH_FLAG_TXVLAN;
279 if (dev->features & NETIF_F_NTUPLE)
280 flags |= ETH_FLAG_NTUPLE;
281 if (dev->features & NETIF_F_RXHASH)
282 flags |= ETH_FLAG_RXHASH;
283
284 return flags;
285 }
286
__ethtool_set_flags(struct net_device *dev, u32 data)287 static int __ethtool_set_flags(struct net_device *dev, u32 data)
288 {
289 netdev_features_t features = 0, changed;
290
291 if (data & ~ETH_ALL_FLAGS)
292 return -EINVAL;
293
294 if (data & ETH_FLAG_LRO)
295 features |= NETIF_F_LRO;
296 if (data & ETH_FLAG_RXVLAN)
297 features |= NETIF_F_HW_VLAN_CTAG_RX;
298 if (data & ETH_FLAG_TXVLAN)
299 features |= NETIF_F_HW_VLAN_CTAG_TX;
300 if (data & ETH_FLAG_NTUPLE)
301 features |= NETIF_F_NTUPLE;
302 if (data & ETH_FLAG_RXHASH)
303 features |= NETIF_F_RXHASH;
304
305 /* allow changing only bits set in hw_features */
306 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
307 if (changed & ~dev->hw_features)
308 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
309
310 dev->wanted_features =
311 (dev->wanted_features & ~changed) | (features & changed);
312
313 __netdev_update_features(dev);
314
315 return 0;
316 }
317
318 /* Given two link masks, AND them together and save the result in dst. */
ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst, struct ethtool_link_ksettings *src)319 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
320 struct ethtool_link_ksettings *src)
321 {
322 unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
323 unsigned int idx = 0;
324
325 for (; idx < size; idx++) {
326 dst->link_modes.supported[idx] &=
327 src->link_modes.supported[idx];
328 dst->link_modes.advertising[idx] &=
329 src->link_modes.advertising[idx];
330 }
331 }
332 EXPORT_SYMBOL(ethtool_intersect_link_masks);
333
ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst, u32 legacy_u32)334 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
335 u32 legacy_u32)
336 {
337 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
338 dst[0] = legacy_u32;
339 }
340 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
341
342 /* 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)343 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
344 const unsigned long *src)
345 {
346 bool retval = true;
347
348 /* TODO: following test will soon always be true */
349 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
350 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
351
352 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
353 bitmap_fill(ext, 32);
354 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
355 if (bitmap_intersects(ext, src,
356 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
357 /* src mask goes beyond bit 31 */
358 retval = false;
359 }
360 }
361 *legacy_u32 = src[0];
362 return retval;
363 }
364 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
365
366 /* return false if ksettings link modes had higher bits
367 * set. legacy_settings always updated (best effort)
368 */
369 static bool
convert_link_ksettings_to_legacy_settings( struct ethtool_cmd *legacy_settings, const struct ethtool_link_ksettings *link_ksettings)370 convert_link_ksettings_to_legacy_settings(
371 struct ethtool_cmd *legacy_settings,
372 const struct ethtool_link_ksettings *link_ksettings)
373 {
374 bool retval = true;
375
376 memset(legacy_settings, 0, sizeof(*legacy_settings));
377 /* this also clears the deprecated fields in legacy structure:
378 * __u8 transceiver;
379 * __u32 maxtxpkt;
380 * __u32 maxrxpkt;
381 */
382
383 retval &= ethtool_convert_link_mode_to_legacy_u32(
384 &legacy_settings->supported,
385 link_ksettings->link_modes.supported);
386 retval &= ethtool_convert_link_mode_to_legacy_u32(
387 &legacy_settings->advertising,
388 link_ksettings->link_modes.advertising);
389 retval &= ethtool_convert_link_mode_to_legacy_u32(
390 &legacy_settings->lp_advertising,
391 link_ksettings->link_modes.lp_advertising);
392 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
393 legacy_settings->duplex
394 = link_ksettings->base.duplex;
395 legacy_settings->port
396 = link_ksettings->base.port;
397 legacy_settings->phy_address
398 = link_ksettings->base.phy_address;
399 legacy_settings->autoneg
400 = link_ksettings->base.autoneg;
401 legacy_settings->mdio_support
402 = link_ksettings->base.mdio_support;
403 legacy_settings->eth_tp_mdix
404 = link_ksettings->base.eth_tp_mdix;
405 legacy_settings->eth_tp_mdix_ctrl
406 = link_ksettings->base.eth_tp_mdix_ctrl;
407 legacy_settings->transceiver
408 = link_ksettings->base.transceiver;
409 return retval;
410 }
411
412 /* number of 32-bit words to store the user's link mode bitmaps */
413 #define __ETHTOOL_LINK_MODE_MASK_NU32 \
414 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
415
416 /* layout of the struct passed from/to userland */
417 struct ethtool_link_usettings {
418 struct ethtool_link_settings base;
419 struct {
420 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
421 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
422 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
423 } link_modes;
424 };
425
426 /* Internal kernel helper to query a device ethtool_link_settings. */
__ethtool_get_link_ksettings(struct net_device *dev, struct ethtool_link_ksettings *link_ksettings)427 int __ethtool_get_link_ksettings(struct net_device *dev,
428 struct ethtool_link_ksettings *link_ksettings)
429 {
430 ASSERT_RTNL();
431
432 if (!dev->ethtool_ops->get_link_ksettings)
433 return -EOPNOTSUPP;
434
435 if (!netif_device_present(dev))
436 return -ENODEV;
437
438 memset(link_ksettings, 0, sizeof(*link_ksettings));
439 return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
440 }
441 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
442
443 /* convert ethtool_link_usettings in user space to a kernel internal
444 * ethtool_link_ksettings. return 0 on success, errno on error.
445 */
load_link_ksettings_from_user(struct ethtool_link_ksettings *to, const void __user *from)446 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
447 const void __user *from)
448 {
449 struct ethtool_link_usettings link_usettings;
450
451 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
452 return -EFAULT;
453
454 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
455 bitmap_from_arr32(to->link_modes.supported,
456 link_usettings.link_modes.supported,
457 __ETHTOOL_LINK_MODE_MASK_NBITS);
458 bitmap_from_arr32(to->link_modes.advertising,
459 link_usettings.link_modes.advertising,
460 __ETHTOOL_LINK_MODE_MASK_NBITS);
461 bitmap_from_arr32(to->link_modes.lp_advertising,
462 link_usettings.link_modes.lp_advertising,
463 __ETHTOOL_LINK_MODE_MASK_NBITS);
464
465 return 0;
466 }
467
468 /* Check if the user is trying to change anything besides speed/duplex */
ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)469 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
470 {
471 struct ethtool_link_settings base2 = {};
472
473 base2.speed = cmd->base.speed;
474 base2.port = PORT_OTHER;
475 base2.duplex = cmd->base.duplex;
476 base2.cmd = cmd->base.cmd;
477 base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
478
479 return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
480 bitmap_empty(cmd->link_modes.supported,
481 __ETHTOOL_LINK_MODE_MASK_NBITS) &&
482 bitmap_empty(cmd->link_modes.lp_advertising,
483 __ETHTOOL_LINK_MODE_MASK_NBITS);
484 }
485
486 /* convert a kernel internal ethtool_link_ksettings to
487 * ethtool_link_usettings in user space. return 0 on success, errno on
488 * error.
489 */
490 static int
store_link_ksettings_for_user(void __user *to, const struct ethtool_link_ksettings *from)491 store_link_ksettings_for_user(void __user *to,
492 const struct ethtool_link_ksettings *from)
493 {
494 struct ethtool_link_usettings link_usettings;
495
496 memcpy(&link_usettings, from, sizeof(link_usettings));
497 bitmap_to_arr32(link_usettings.link_modes.supported,
498 from->link_modes.supported,
499 __ETHTOOL_LINK_MODE_MASK_NBITS);
500 bitmap_to_arr32(link_usettings.link_modes.advertising,
501 from->link_modes.advertising,
502 __ETHTOOL_LINK_MODE_MASK_NBITS);
503 bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
504 from->link_modes.lp_advertising,
505 __ETHTOOL_LINK_MODE_MASK_NBITS);
506
507 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
508 return -EFAULT;
509
510 return 0;
511 }
512
513 /* Query device for its ethtool_link_settings. */
ethtool_get_link_ksettings(struct net_device *dev, void __user *useraddr)514 static int ethtool_get_link_ksettings(struct net_device *dev,
515 void __user *useraddr)
516 {
517 int err = 0;
518 struct ethtool_link_ksettings link_ksettings;
519
520 ASSERT_RTNL();
521 if (!dev->ethtool_ops->get_link_ksettings)
522 return -EOPNOTSUPP;
523
524 /* handle bitmap nbits handshake */
525 if (copy_from_user(&link_ksettings.base, useraddr,
526 sizeof(link_ksettings.base)))
527 return -EFAULT;
528
529 if (__ETHTOOL_LINK_MODE_MASK_NU32
530 != link_ksettings.base.link_mode_masks_nwords) {
531 /* wrong link mode nbits requested */
532 memset(&link_ksettings, 0, sizeof(link_ksettings));
533 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
534 /* send back number of words required as negative val */
535 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
536 "need too many bits for link modes!");
537 link_ksettings.base.link_mode_masks_nwords
538 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
539
540 /* copy the base fields back to user, not the link
541 * mode bitmaps
542 */
543 if (copy_to_user(useraddr, &link_ksettings.base,
544 sizeof(link_ksettings.base)))
545 return -EFAULT;
546
547 return 0;
548 }
549
550 /* handshake successful: user/kernel agree on
551 * link_mode_masks_nwords
552 */
553
554 memset(&link_ksettings, 0, sizeof(link_ksettings));
555 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
556 if (err < 0)
557 return err;
558
559 /* make sure we tell the right values to user */
560 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
561 link_ksettings.base.link_mode_masks_nwords
562 = __ETHTOOL_LINK_MODE_MASK_NU32;
563 link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
564 link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
565
566 return store_link_ksettings_for_user(useraddr, &link_ksettings);
567 }
568
569 /* Update device ethtool_link_settings. */
ethtool_set_link_ksettings(struct net_device *dev, void __user *useraddr)570 static int ethtool_set_link_ksettings(struct net_device *dev,
571 void __user *useraddr)
572 {
573 int err;
574 struct ethtool_link_ksettings link_ksettings;
575
576 ASSERT_RTNL();
577
578 if (!dev->ethtool_ops->set_link_ksettings)
579 return -EOPNOTSUPP;
580
581 /* make sure nbits field has expected value */
582 if (copy_from_user(&link_ksettings.base, useraddr,
583 sizeof(link_ksettings.base)))
584 return -EFAULT;
585
586 if (__ETHTOOL_LINK_MODE_MASK_NU32
587 != link_ksettings.base.link_mode_masks_nwords)
588 return -EINVAL;
589
590 /* copy the whole structure, now that we know it has expected
591 * format
592 */
593 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
594 if (err)
595 return err;
596
597 /* re-check nwords field, just in case */
598 if (__ETHTOOL_LINK_MODE_MASK_NU32
599 != link_ksettings.base.link_mode_masks_nwords)
600 return -EINVAL;
601
602 if (link_ksettings.base.master_slave_cfg ||
603 link_ksettings.base.master_slave_state)
604 return -EINVAL;
605
606 err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
607 if (err >= 0) {
608 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
609 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
610 }
611 return err;
612 }
613
ethtool_virtdev_set_link_ksettings(struct net_device *dev, const struct ethtool_link_ksettings *cmd, u32 *dev_speed, u8 *dev_duplex)614 int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
615 const struct ethtool_link_ksettings *cmd,
616 u32 *dev_speed, u8 *dev_duplex)
617 {
618 u32 speed;
619 u8 duplex;
620
621 speed = cmd->base.speed;
622 duplex = cmd->base.duplex;
623 /* don't allow custom speed and duplex */
624 if (!ethtool_validate_speed(speed) ||
625 !ethtool_validate_duplex(duplex) ||
626 !ethtool_virtdev_validate_cmd(cmd))
627 return -EINVAL;
628 *dev_speed = speed;
629 *dev_duplex = duplex;
630
631 return 0;
632 }
633 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
634
635 /* Query device for its ethtool_cmd settings.
636 *
637 * Backward compatibility note: for compatibility with legacy ethtool, this is
638 * now implemented via get_link_ksettings. When driver reports higher link mode
639 * bits, a kernel warning is logged once (with name of 1st driver/device) to
640 * recommend user to upgrade ethtool, but the command is successful (only the
641 * lower link mode bits reported back to user). Deprecated fields from
642 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
643 */
ethtool_get_settings(struct net_device *dev, void __user *useraddr)644 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
645 {
646 struct ethtool_link_ksettings link_ksettings;
647 struct ethtool_cmd cmd;
648 int err;
649
650 ASSERT_RTNL();
651 if (!dev->ethtool_ops->get_link_ksettings)
652 return -EOPNOTSUPP;
653
654 memset(&link_ksettings, 0, sizeof(link_ksettings));
655 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
656 if (err < 0)
657 return err;
658 convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
659
660 /* send a sensible cmd tag back to user */
661 cmd.cmd = ETHTOOL_GSET;
662
663 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
664 return -EFAULT;
665
666 return 0;
667 }
668
669 /* Update device link settings with given ethtool_cmd.
670 *
671 * Backward compatibility note: for compatibility with legacy ethtool, this is
672 * now always implemented via set_link_settings. When user's request updates
673 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
674 * warning is logged once (with name of 1st driver/device) to recommend user to
675 * upgrade ethtool, and the request is rejected.
676 */
ethtool_set_settings(struct net_device *dev, void __user *useraddr)677 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
678 {
679 struct ethtool_link_ksettings link_ksettings;
680 struct ethtool_cmd cmd;
681 int ret;
682
683 ASSERT_RTNL();
684
685 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
686 return -EFAULT;
687 if (!dev->ethtool_ops->set_link_ksettings)
688 return -EOPNOTSUPP;
689
690 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
691 return -EINVAL;
692 link_ksettings.base.link_mode_masks_nwords =
693 __ETHTOOL_LINK_MODE_MASK_NU32;
694 ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
695 if (ret >= 0) {
696 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
697 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
698 }
699 return ret;
700 }
701
ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)702 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
703 void __user *useraddr)
704 {
705 struct ethtool_drvinfo info;
706 const struct ethtool_ops *ops = dev->ethtool_ops;
707
708 memset(&info, 0, sizeof(info));
709 info.cmd = ETHTOOL_GDRVINFO;
710 strlcpy(info.version, UTS_RELEASE, sizeof(info.version));
711 if (ops->get_drvinfo) {
712 ops->get_drvinfo(dev, &info);
713 } else if (dev->dev.parent && dev->dev.parent->driver) {
714 strlcpy(info.bus_info, dev_name(dev->dev.parent),
715 sizeof(info.bus_info));
716 strlcpy(info.driver, dev->dev.parent->driver->name,
717 sizeof(info.driver));
718 } else {
719 return -EOPNOTSUPP;
720 }
721
722 /*
723 * this method of obtaining string set info is deprecated;
724 * Use ETHTOOL_GSSET_INFO instead.
725 */
726 if (ops->get_sset_count) {
727 int rc;
728
729 rc = ops->get_sset_count(dev, ETH_SS_TEST);
730 if (rc >= 0)
731 info.testinfo_len = rc;
732 rc = ops->get_sset_count(dev, ETH_SS_STATS);
733 if (rc >= 0)
734 info.n_stats = rc;
735 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
736 if (rc >= 0)
737 info.n_priv_flags = rc;
738 }
739 if (ops->get_regs_len) {
740 int ret = ops->get_regs_len(dev);
741
742 if (ret > 0)
743 info.regdump_len = ret;
744 }
745
746 if (ops->get_eeprom_len)
747 info.eedump_len = ops->get_eeprom_len(dev);
748
749 if (!info.fw_version[0])
750 devlink_compat_running_version(dev, info.fw_version,
751 sizeof(info.fw_version));
752
753 if (copy_to_user(useraddr, &info, sizeof(info)))
754 return -EFAULT;
755 return 0;
756 }
757
ethtool_get_sset_info(struct net_device *dev, void __user *useraddr)758 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
759 void __user *useraddr)
760 {
761 struct ethtool_sset_info info;
762 u64 sset_mask;
763 int i, idx = 0, n_bits = 0, ret, rc;
764 u32 *info_buf = NULL;
765
766 if (copy_from_user(&info, useraddr, sizeof(info)))
767 return -EFAULT;
768
769 /* store copy of mask, because we zero struct later on */
770 sset_mask = info.sset_mask;
771 if (!sset_mask)
772 return 0;
773
774 /* calculate size of return buffer */
775 n_bits = hweight64(sset_mask);
776
777 memset(&info, 0, sizeof(info));
778 info.cmd = ETHTOOL_GSSET_INFO;
779
780 info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
781 if (!info_buf)
782 return -ENOMEM;
783
784 /*
785 * fill return buffer based on input bitmask and successful
786 * get_sset_count return
787 */
788 for (i = 0; i < 64; i++) {
789 if (!(sset_mask & (1ULL << i)))
790 continue;
791
792 rc = __ethtool_get_sset_count(dev, i);
793 if (rc >= 0) {
794 info.sset_mask |= (1ULL << i);
795 info_buf[idx++] = rc;
796 }
797 }
798
799 ret = -EFAULT;
800 if (copy_to_user(useraddr, &info, sizeof(info)))
801 goto out;
802
803 useraddr += offsetof(struct ethtool_sset_info, data);
804 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
805 goto out;
806
807 ret = 0;
808
809 out:
810 kfree(info_buf);
811 return ret;
812 }
813
814 static noinline_for_stack int
ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc, const struct compat_ethtool_rxnfc __user *useraddr, size_t size)815 ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
816 const struct compat_ethtool_rxnfc __user *useraddr,
817 size_t size)
818 {
819 struct compat_ethtool_rxnfc crxnfc = {};
820
821 /* We expect there to be holes between fs.m_ext and
822 * fs.ring_cookie and at the end of fs, but nowhere else.
823 * On non-x86, no conversion should be needed.
824 */
825 BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) &&
826 sizeof(struct compat_ethtool_rxnfc) !=
827 sizeof(struct ethtool_rxnfc));
828 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
829 sizeof(useraddr->fs.m_ext) !=
830 offsetof(struct ethtool_rxnfc, fs.m_ext) +
831 sizeof(rxnfc->fs.m_ext));
832 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) -
833 offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
834 offsetof(struct ethtool_rxnfc, fs.location) -
835 offsetof(struct ethtool_rxnfc, fs.ring_cookie));
836
837 if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc))))
838 return -EFAULT;
839
840 *rxnfc = (struct ethtool_rxnfc) {
841 .cmd = crxnfc.cmd,
842 .flow_type = crxnfc.flow_type,
843 .data = crxnfc.data,
844 .fs = {
845 .flow_type = crxnfc.fs.flow_type,
846 .h_u = crxnfc.fs.h_u,
847 .h_ext = crxnfc.fs.h_ext,
848 .m_u = crxnfc.fs.m_u,
849 .m_ext = crxnfc.fs.m_ext,
850 .ring_cookie = crxnfc.fs.ring_cookie,
851 .location = crxnfc.fs.location,
852 },
853 .rule_cnt = crxnfc.rule_cnt,
854 };
855
856 return 0;
857 }
858
ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc, const void __user *useraddr, size_t size)859 static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc,
860 const void __user *useraddr,
861 size_t size)
862 {
863 if (compat_need_64bit_alignment_fixup())
864 return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size);
865
866 if (copy_from_user(rxnfc, useraddr, size))
867 return -EFAULT;
868
869 return 0;
870 }
871
ethtool_rxnfc_copy_to_compat(void __user *useraddr, const struct ethtool_rxnfc *rxnfc, size_t size, const u32 *rule_buf)872 static int ethtool_rxnfc_copy_to_compat(void __user *useraddr,
873 const struct ethtool_rxnfc *rxnfc,
874 size_t size, const u32 *rule_buf)
875 {
876 struct compat_ethtool_rxnfc crxnfc;
877
878 memset(&crxnfc, 0, sizeof(crxnfc));
879 crxnfc = (struct compat_ethtool_rxnfc) {
880 .cmd = rxnfc->cmd,
881 .flow_type = rxnfc->flow_type,
882 .data = rxnfc->data,
883 .fs = {
884 .flow_type = rxnfc->fs.flow_type,
885 .h_u = rxnfc->fs.h_u,
886 .h_ext = rxnfc->fs.h_ext,
887 .m_u = rxnfc->fs.m_u,
888 .m_ext = rxnfc->fs.m_ext,
889 .ring_cookie = rxnfc->fs.ring_cookie,
890 .location = rxnfc->fs.location,
891 },
892 .rule_cnt = rxnfc->rule_cnt,
893 };
894
895 if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc))))
896 return -EFAULT;
897
898 return 0;
899 }
900
ethtool_rxnfc_copy_to_user(void __user *useraddr, const struct ethtool_rxnfc *rxnfc, size_t size, const u32 *rule_buf)901 static int ethtool_rxnfc_copy_to_user(void __user *useraddr,
902 const struct ethtool_rxnfc *rxnfc,
903 size_t size, const u32 *rule_buf)
904 {
905 int ret;
906
907 if (compat_need_64bit_alignment_fixup()) {
908 ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size,
909 rule_buf);
910 useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs);
911 } else {
912 ret = copy_to_user(useraddr, rxnfc, size);
913 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
914 }
915
916 if (ret)
917 return -EFAULT;
918
919 if (rule_buf) {
920 if (copy_to_user(useraddr, rule_buf,
921 rxnfc->rule_cnt * sizeof(u32)))
922 return -EFAULT;
923 }
924
925 return 0;
926 }
927
ethtool_set_rxnfc(struct net_device *dev, u32 cmd, void __user *useraddr)928 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
929 u32 cmd, void __user *useraddr)
930 {
931 struct ethtool_rxnfc info;
932 size_t info_size = sizeof(info);
933 int rc;
934
935 if (!dev->ethtool_ops->set_rxnfc)
936 return -EOPNOTSUPP;
937
938 /* struct ethtool_rxnfc was originally defined for
939 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
940 * members. User-space might still be using that
941 * definition. */
942 if (cmd == ETHTOOL_SRXFH)
943 info_size = (offsetof(struct ethtool_rxnfc, data) +
944 sizeof(info.data));
945
946 if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
947 return -EFAULT;
948
949 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
950 if (rc)
951 return rc;
952
953 if (cmd == ETHTOOL_SRXCLSRLINS &&
954 ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
955 return -EFAULT;
956
957 return 0;
958 }
959
ethtool_get_rxnfc(struct net_device *dev, u32 cmd, void __user *useraddr)960 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
961 u32 cmd, void __user *useraddr)
962 {
963 struct ethtool_rxnfc info;
964 size_t info_size = sizeof(info);
965 const struct ethtool_ops *ops = dev->ethtool_ops;
966 int ret;
967 void *rule_buf = NULL;
968
969 if (!ops->get_rxnfc)
970 return -EOPNOTSUPP;
971
972 /* struct ethtool_rxnfc was originally defined for
973 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
974 * members. User-space might still be using that
975 * definition. */
976 if (cmd == ETHTOOL_GRXFH)
977 info_size = (offsetof(struct ethtool_rxnfc, data) +
978 sizeof(info.data));
979
980 if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
981 return -EFAULT;
982
983 /* If FLOW_RSS was requested then user-space must be using the
984 * new definition, as FLOW_RSS is newer.
985 */
986 if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
987 info_size = sizeof(info);
988 if (ethtool_rxnfc_copy_from_user(&info, useraddr, info_size))
989 return -EFAULT;
990 /* Since malicious users may modify the original data,
991 * we need to check whether FLOW_RSS is still requested.
992 */
993 if (!(info.flow_type & FLOW_RSS))
994 return -EINVAL;
995 }
996
997 if (info.cmd != cmd)
998 return -EINVAL;
999
1000 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1001 if (info.rule_cnt > 0) {
1002 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1003 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
1004 GFP_USER);
1005 if (!rule_buf)
1006 return -ENOMEM;
1007 }
1008 }
1009
1010 ret = ops->get_rxnfc(dev, &info, rule_buf);
1011 if (ret < 0)
1012 goto err_out;
1013
1014 ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
1015 err_out:
1016 kfree(rule_buf);
1017
1018 return ret;
1019 }
1020
ethtool_copy_validate_indir(u32 *indir, void __user *useraddr, struct ethtool_rxnfc *rx_rings, u32 size)1021 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1022 struct ethtool_rxnfc *rx_rings,
1023 u32 size)
1024 {
1025 int i;
1026
1027 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1028 return -EFAULT;
1029
1030 /* Validate ring indices */
1031 for (i = 0; i < size; i++)
1032 if (indir[i] >= rx_rings->data)
1033 return -EINVAL;
1034
1035 return 0;
1036 }
1037
1038 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1039
netdev_rss_key_fill(void *buffer, size_t len)1040 void netdev_rss_key_fill(void *buffer, size_t len)
1041 {
1042 BUG_ON(len > sizeof(netdev_rss_key));
1043 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1044 memcpy(buffer, netdev_rss_key, len);
1045 }
1046 EXPORT_SYMBOL(netdev_rss_key_fill);
1047
ethtool_get_rxfh_indir(struct net_device *dev, void __user *useraddr)1048 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1049 void __user *useraddr)
1050 {
1051 u32 user_size, dev_size;
1052 u32 *indir;
1053 int ret;
1054
1055 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1056 !dev->ethtool_ops->get_rxfh)
1057 return -EOPNOTSUPP;
1058 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1059 if (dev_size == 0)
1060 return -EOPNOTSUPP;
1061
1062 if (copy_from_user(&user_size,
1063 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1064 sizeof(user_size)))
1065 return -EFAULT;
1066
1067 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1068 &dev_size, sizeof(dev_size)))
1069 return -EFAULT;
1070
1071 /* If the user buffer size is 0, this is just a query for the
1072 * device table size. Otherwise, if it's smaller than the
1073 * device table size it's an error.
1074 */
1075 if (user_size < dev_size)
1076 return user_size == 0 ? 0 : -EINVAL;
1077
1078 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1079 if (!indir)
1080 return -ENOMEM;
1081
1082 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1083 if (ret)
1084 goto out;
1085
1086 if (copy_to_user(useraddr +
1087 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1088 indir, dev_size * sizeof(indir[0])))
1089 ret = -EFAULT;
1090
1091 out:
1092 kfree(indir);
1093 return ret;
1094 }
1095
ethtool_set_rxfh_indir(struct net_device *dev, void __user *useraddr)1096 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1097 void __user *useraddr)
1098 {
1099 struct ethtool_rxnfc rx_rings;
1100 u32 user_size, dev_size, i;
1101 u32 *indir;
1102 const struct ethtool_ops *ops = dev->ethtool_ops;
1103 int ret;
1104 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1105
1106 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1107 !ops->get_rxnfc)
1108 return -EOPNOTSUPP;
1109
1110 dev_size = ops->get_rxfh_indir_size(dev);
1111 if (dev_size == 0)
1112 return -EOPNOTSUPP;
1113
1114 if (copy_from_user(&user_size,
1115 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1116 sizeof(user_size)))
1117 return -EFAULT;
1118
1119 if (user_size != 0 && user_size != dev_size)
1120 return -EINVAL;
1121
1122 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1123 if (!indir)
1124 return -ENOMEM;
1125
1126 rx_rings.cmd = ETHTOOL_GRXRINGS;
1127 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1128 if (ret)
1129 goto out;
1130
1131 if (user_size == 0) {
1132 for (i = 0; i < dev_size; i++)
1133 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1134 } else {
1135 ret = ethtool_copy_validate_indir(indir,
1136 useraddr + ringidx_offset,
1137 &rx_rings,
1138 dev_size);
1139 if (ret)
1140 goto out;
1141 }
1142
1143 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1144 if (ret)
1145 goto out;
1146
1147 /* indicate whether rxfh was set to default */
1148 if (user_size == 0)
1149 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1150 else
1151 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1152
1153 out:
1154 kfree(indir);
1155 return ret;
1156 }
1157
ethtool_get_rxfh(struct net_device *dev, void __user *useraddr)1158 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1159 void __user *useraddr)
1160 {
1161 int ret;
1162 const struct ethtool_ops *ops = dev->ethtool_ops;
1163 u32 user_indir_size, user_key_size;
1164 u32 dev_indir_size = 0, dev_key_size = 0;
1165 struct ethtool_rxfh rxfh;
1166 u32 total_size;
1167 u32 indir_bytes;
1168 u32 *indir = NULL;
1169 u8 dev_hfunc = 0;
1170 u8 *hkey = NULL;
1171 u8 *rss_config;
1172
1173 if (!ops->get_rxfh)
1174 return -EOPNOTSUPP;
1175
1176 if (ops->get_rxfh_indir_size)
1177 dev_indir_size = ops->get_rxfh_indir_size(dev);
1178 if (ops->get_rxfh_key_size)
1179 dev_key_size = ops->get_rxfh_key_size(dev);
1180
1181 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1182 return -EFAULT;
1183 user_indir_size = rxfh.indir_size;
1184 user_key_size = rxfh.key_size;
1185
1186 /* Check that reserved fields are 0 for now */
1187 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1188 return -EINVAL;
1189 /* Most drivers don't handle rss_context, check it's 0 as well */
1190 if (rxfh.rss_context && !ops->get_rxfh_context)
1191 return -EOPNOTSUPP;
1192
1193 rxfh.indir_size = dev_indir_size;
1194 rxfh.key_size = dev_key_size;
1195 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1196 return -EFAULT;
1197
1198 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1199 (user_key_size && (user_key_size != dev_key_size)))
1200 return -EINVAL;
1201
1202 indir_bytes = user_indir_size * sizeof(indir[0]);
1203 total_size = indir_bytes + user_key_size;
1204 rss_config = kzalloc(total_size, GFP_USER);
1205 if (!rss_config)
1206 return -ENOMEM;
1207
1208 if (user_indir_size)
1209 indir = (u32 *)rss_config;
1210
1211 if (user_key_size)
1212 hkey = rss_config + indir_bytes;
1213
1214 if (rxfh.rss_context)
1215 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1216 &dev_hfunc,
1217 rxfh.rss_context);
1218 else
1219 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1220 if (ret)
1221 goto out;
1222
1223 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1224 &dev_hfunc, sizeof(rxfh.hfunc))) {
1225 ret = -EFAULT;
1226 } else if (copy_to_user(useraddr +
1227 offsetof(struct ethtool_rxfh, rss_config[0]),
1228 rss_config, total_size)) {
1229 ret = -EFAULT;
1230 }
1231 out:
1232 kfree(rss_config);
1233
1234 return ret;
1235 }
1236
ethtool_set_rxfh(struct net_device *dev, void __user *useraddr)1237 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1238 void __user *useraddr)
1239 {
1240 int ret;
1241 const struct ethtool_ops *ops = dev->ethtool_ops;
1242 struct ethtool_rxnfc rx_rings;
1243 struct ethtool_rxfh rxfh;
1244 u32 dev_indir_size = 0, dev_key_size = 0, i;
1245 u32 *indir = NULL, indir_bytes = 0;
1246 u8 *hkey = NULL;
1247 u8 *rss_config;
1248 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1249 bool delete = false;
1250
1251 if (!ops->get_rxnfc || !ops->set_rxfh)
1252 return -EOPNOTSUPP;
1253
1254 if (ops->get_rxfh_indir_size)
1255 dev_indir_size = ops->get_rxfh_indir_size(dev);
1256 if (ops->get_rxfh_key_size)
1257 dev_key_size = ops->get_rxfh_key_size(dev);
1258
1259 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1260 return -EFAULT;
1261
1262 /* Check that reserved fields are 0 for now */
1263 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1264 return -EINVAL;
1265 /* Most drivers don't handle rss_context, check it's 0 as well */
1266 if (rxfh.rss_context && !ops->set_rxfh_context)
1267 return -EOPNOTSUPP;
1268
1269 /* If either indir, hash key or function is valid, proceed further.
1270 * Must request at least one change: indir size, hash key or function.
1271 */
1272 if ((rxfh.indir_size &&
1273 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1274 rxfh.indir_size != dev_indir_size) ||
1275 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1276 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1277 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1278 return -EINVAL;
1279
1280 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1281 indir_bytes = dev_indir_size * sizeof(indir[0]);
1282
1283 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1284 if (!rss_config)
1285 return -ENOMEM;
1286
1287 rx_rings.cmd = ETHTOOL_GRXRINGS;
1288 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1289 if (ret)
1290 goto out;
1291
1292 /* rxfh.indir_size == 0 means reset the indir table to default (master
1293 * context) or delete the context (other RSS contexts).
1294 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1295 */
1296 if (rxfh.indir_size &&
1297 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1298 indir = (u32 *)rss_config;
1299 ret = ethtool_copy_validate_indir(indir,
1300 useraddr + rss_cfg_offset,
1301 &rx_rings,
1302 rxfh.indir_size);
1303 if (ret)
1304 goto out;
1305 } else if (rxfh.indir_size == 0) {
1306 if (rxfh.rss_context == 0) {
1307 indir = (u32 *)rss_config;
1308 for (i = 0; i < dev_indir_size; i++)
1309 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1310 } else {
1311 delete = true;
1312 }
1313 }
1314
1315 if (rxfh.key_size) {
1316 hkey = rss_config + indir_bytes;
1317 if (copy_from_user(hkey,
1318 useraddr + rss_cfg_offset + indir_bytes,
1319 rxfh.key_size)) {
1320 ret = -EFAULT;
1321 goto out;
1322 }
1323 }
1324
1325 if (rxfh.rss_context)
1326 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1327 &rxfh.rss_context, delete);
1328 else
1329 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1330 if (ret)
1331 goto out;
1332
1333 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1334 &rxfh.rss_context, sizeof(rxfh.rss_context)))
1335 ret = -EFAULT;
1336
1337 if (!rxfh.rss_context) {
1338 /* indicate whether rxfh was set to default */
1339 if (rxfh.indir_size == 0)
1340 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1341 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1342 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1343 }
1344
1345 out:
1346 kfree(rss_config);
1347 return ret;
1348 }
1349
ethtool_get_regs(struct net_device *dev, char __user *useraddr)1350 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1351 {
1352 struct ethtool_regs regs;
1353 const struct ethtool_ops *ops = dev->ethtool_ops;
1354 void *regbuf;
1355 int reglen, ret;
1356
1357 if (!ops->get_regs || !ops->get_regs_len)
1358 return -EOPNOTSUPP;
1359
1360 if (copy_from_user(®s, useraddr, sizeof(regs)))
1361 return -EFAULT;
1362
1363 reglen = ops->get_regs_len(dev);
1364 if (reglen <= 0)
1365 return reglen;
1366
1367 if (regs.len > reglen)
1368 regs.len = reglen;
1369
1370 regbuf = vzalloc(reglen);
1371 if (!regbuf)
1372 return -ENOMEM;
1373
1374 if (regs.len < reglen)
1375 reglen = regs.len;
1376
1377 ops->get_regs(dev, ®s, regbuf);
1378
1379 ret = -EFAULT;
1380 if (copy_to_user(useraddr, ®s, sizeof(regs)))
1381 goto out;
1382 useraddr += offsetof(struct ethtool_regs, data);
1383 if (copy_to_user(useraddr, regbuf, reglen))
1384 goto out;
1385 ret = 0;
1386
1387 out:
1388 vfree(regbuf);
1389 return ret;
1390 }
1391
ethtool_reset(struct net_device *dev, char __user *useraddr)1392 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1393 {
1394 struct ethtool_value reset;
1395 int ret;
1396
1397 if (!dev->ethtool_ops->reset)
1398 return -EOPNOTSUPP;
1399
1400 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1401 return -EFAULT;
1402
1403 ret = dev->ethtool_ops->reset(dev, &reset.data);
1404 if (ret)
1405 return ret;
1406
1407 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1408 return -EFAULT;
1409 return 0;
1410 }
1411
ethtool_get_wol(struct net_device *dev, char __user *useraddr)1412 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1413 {
1414 struct ethtool_wolinfo wol;
1415
1416 if (!dev->ethtool_ops->get_wol)
1417 return -EOPNOTSUPP;
1418
1419 memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1420 wol.cmd = ETHTOOL_GWOL;
1421 dev->ethtool_ops->get_wol(dev, &wol);
1422
1423 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1424 return -EFAULT;
1425 return 0;
1426 }
1427
ethtool_set_wol(struct net_device *dev, char __user *useraddr)1428 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1429 {
1430 struct ethtool_wolinfo wol;
1431 int ret;
1432
1433 if (!dev->ethtool_ops->set_wol)
1434 return -EOPNOTSUPP;
1435
1436 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1437 return -EFAULT;
1438
1439 ret = dev->ethtool_ops->set_wol(dev, &wol);
1440 if (ret)
1441 return ret;
1442
1443 dev->wol_enabled = !!wol.wolopts;
1444 ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1445
1446 return 0;
1447 }
1448
ethtool_get_eee(struct net_device *dev, char __user *useraddr)1449 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1450 {
1451 struct ethtool_eee edata;
1452 int rc;
1453
1454 if (!dev->ethtool_ops->get_eee)
1455 return -EOPNOTSUPP;
1456
1457 memset(&edata, 0, sizeof(struct ethtool_eee));
1458 edata.cmd = ETHTOOL_GEEE;
1459 rc = dev->ethtool_ops->get_eee(dev, &edata);
1460
1461 if (rc)
1462 return rc;
1463
1464 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1465 return -EFAULT;
1466
1467 return 0;
1468 }
1469
ethtool_set_eee(struct net_device *dev, char __user *useraddr)1470 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1471 {
1472 struct ethtool_eee edata;
1473 int ret;
1474
1475 if (!dev->ethtool_ops->set_eee)
1476 return -EOPNOTSUPP;
1477
1478 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1479 return -EFAULT;
1480
1481 ret = dev->ethtool_ops->set_eee(dev, &edata);
1482 if (!ret)
1483 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1484 return ret;
1485 }
1486
ethtool_nway_reset(struct net_device *dev)1487 static int ethtool_nway_reset(struct net_device *dev)
1488 {
1489 if (!dev->ethtool_ops->nway_reset)
1490 return -EOPNOTSUPP;
1491
1492 return dev->ethtool_ops->nway_reset(dev);
1493 }
1494
ethtool_get_link(struct net_device *dev, char __user *useraddr)1495 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1496 {
1497 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1498 int link = __ethtool_get_link(dev);
1499
1500 if (link < 0)
1501 return link;
1502
1503 edata.data = link;
1504 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1505 return -EFAULT;
1506 return 0;
1507 }
1508
ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr, int (*getter)(struct net_device *, struct ethtool_eeprom *, u8 *), u32 total_len)1509 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1510 int (*getter)(struct net_device *,
1511 struct ethtool_eeprom *, u8 *),
1512 u32 total_len)
1513 {
1514 struct ethtool_eeprom eeprom;
1515 void __user *userbuf = useraddr + sizeof(eeprom);
1516 u32 bytes_remaining;
1517 u8 *data;
1518 int ret = 0;
1519
1520 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1521 return -EFAULT;
1522
1523 /* Check for wrap and zero */
1524 if (eeprom.offset + eeprom.len <= eeprom.offset)
1525 return -EINVAL;
1526
1527 /* Check for exceeding total eeprom len */
1528 if (eeprom.offset + eeprom.len > total_len)
1529 return -EINVAL;
1530
1531 data = kzalloc(PAGE_SIZE, GFP_USER);
1532 if (!data)
1533 return -ENOMEM;
1534
1535 bytes_remaining = eeprom.len;
1536 while (bytes_remaining > 0) {
1537 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1538
1539 ret = getter(dev, &eeprom, data);
1540 if (ret)
1541 break;
1542 if (copy_to_user(userbuf, data, eeprom.len)) {
1543 ret = -EFAULT;
1544 break;
1545 }
1546 userbuf += eeprom.len;
1547 eeprom.offset += eeprom.len;
1548 bytes_remaining -= eeprom.len;
1549 }
1550
1551 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1552 eeprom.offset -= eeprom.len;
1553 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1554 ret = -EFAULT;
1555
1556 kfree(data);
1557 return ret;
1558 }
1559
ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)1560 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1561 {
1562 const struct ethtool_ops *ops = dev->ethtool_ops;
1563
1564 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1565 !ops->get_eeprom_len(dev))
1566 return -EOPNOTSUPP;
1567
1568 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1569 ops->get_eeprom_len(dev));
1570 }
1571
ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)1572 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1573 {
1574 struct ethtool_eeprom eeprom;
1575 const struct ethtool_ops *ops = dev->ethtool_ops;
1576 void __user *userbuf = useraddr + sizeof(eeprom);
1577 u32 bytes_remaining;
1578 u8 *data;
1579 int ret = 0;
1580
1581 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1582 !ops->get_eeprom_len(dev))
1583 return -EOPNOTSUPP;
1584
1585 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1586 return -EFAULT;
1587
1588 /* Check for wrap and zero */
1589 if (eeprom.offset + eeprom.len <= eeprom.offset)
1590 return -EINVAL;
1591
1592 /* Check for exceeding total eeprom len */
1593 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1594 return -EINVAL;
1595
1596 data = kzalloc(PAGE_SIZE, GFP_USER);
1597 if (!data)
1598 return -ENOMEM;
1599
1600 bytes_remaining = eeprom.len;
1601 while (bytes_remaining > 0) {
1602 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1603
1604 if (copy_from_user(data, userbuf, eeprom.len)) {
1605 ret = -EFAULT;
1606 break;
1607 }
1608 ret = ops->set_eeprom(dev, &eeprom, data);
1609 if (ret)
1610 break;
1611 userbuf += eeprom.len;
1612 eeprom.offset += eeprom.len;
1613 bytes_remaining -= eeprom.len;
1614 }
1615
1616 kfree(data);
1617 return ret;
1618 }
1619
ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)1620 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1621 void __user *useraddr)
1622 {
1623 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1624 int ret;
1625
1626 if (!dev->ethtool_ops->get_coalesce)
1627 return -EOPNOTSUPP;
1628
1629 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce);
1630 if (ret)
1631 return ret;
1632
1633 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1634 return -EFAULT;
1635 return 0;
1636 }
1637
1638 static bool
ethtool_set_coalesce_supported(struct net_device *dev, struct ethtool_coalesce *coalesce)1639 ethtool_set_coalesce_supported(struct net_device *dev,
1640 struct ethtool_coalesce *coalesce)
1641 {
1642 u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1643 u32 nonzero_params = 0;
1644
1645 if (coalesce->rx_coalesce_usecs)
1646 nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1647 if (coalesce->rx_max_coalesced_frames)
1648 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1649 if (coalesce->rx_coalesce_usecs_irq)
1650 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1651 if (coalesce->rx_max_coalesced_frames_irq)
1652 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1653 if (coalesce->tx_coalesce_usecs)
1654 nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1655 if (coalesce->tx_max_coalesced_frames)
1656 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1657 if (coalesce->tx_coalesce_usecs_irq)
1658 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1659 if (coalesce->tx_max_coalesced_frames_irq)
1660 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1661 if (coalesce->stats_block_coalesce_usecs)
1662 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1663 if (coalesce->use_adaptive_rx_coalesce)
1664 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1665 if (coalesce->use_adaptive_tx_coalesce)
1666 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1667 if (coalesce->pkt_rate_low)
1668 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1669 if (coalesce->rx_coalesce_usecs_low)
1670 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1671 if (coalesce->rx_max_coalesced_frames_low)
1672 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1673 if (coalesce->tx_coalesce_usecs_low)
1674 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1675 if (coalesce->tx_max_coalesced_frames_low)
1676 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1677 if (coalesce->pkt_rate_high)
1678 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1679 if (coalesce->rx_coalesce_usecs_high)
1680 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1681 if (coalesce->rx_max_coalesced_frames_high)
1682 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1683 if (coalesce->tx_coalesce_usecs_high)
1684 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1685 if (coalesce->tx_max_coalesced_frames_high)
1686 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1687 if (coalesce->rate_sample_interval)
1688 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1689
1690 return (supported_params & nonzero_params) == nonzero_params;
1691 }
1692
ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)1693 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1694 void __user *useraddr)
1695 {
1696 struct ethtool_coalesce coalesce;
1697 int ret;
1698
1699 if (!dev->ethtool_ops->set_coalesce)
1700 return -EOPNOTSUPP;
1701
1702 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1703 return -EFAULT;
1704
1705 if (!ethtool_set_coalesce_supported(dev, &coalesce))
1706 return -EOPNOTSUPP;
1707
1708 ret = dev->ethtool_ops->set_coalesce(dev, &coalesce);
1709 if (!ret)
1710 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
1711 return ret;
1712 }
1713
ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)1714 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1715 {
1716 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1717
1718 if (!dev->ethtool_ops->get_ringparam)
1719 return -EOPNOTSUPP;
1720
1721 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1722
1723 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1724 return -EFAULT;
1725 return 0;
1726 }
1727
ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)1728 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1729 {
1730 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1731 int ret;
1732
1733 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1734 return -EOPNOTSUPP;
1735
1736 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1737 return -EFAULT;
1738
1739 dev->ethtool_ops->get_ringparam(dev, &max);
1740
1741 /* ensure new ring parameters are within the maximums */
1742 if (ringparam.rx_pending > max.rx_max_pending ||
1743 ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1744 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1745 ringparam.tx_pending > max.tx_max_pending)
1746 return -EINVAL;
1747
1748 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam);
1749 if (!ret)
1750 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
1751 return ret;
1752 }
1753
ethtool_get_channels(struct net_device *dev, void __user *useraddr)1754 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1755 void __user *useraddr)
1756 {
1757 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1758
1759 if (!dev->ethtool_ops->get_channels)
1760 return -EOPNOTSUPP;
1761
1762 dev->ethtool_ops->get_channels(dev, &channels);
1763
1764 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1765 return -EFAULT;
1766 return 0;
1767 }
1768
ethtool_set_channels(struct net_device *dev, void __user *useraddr)1769 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1770 void __user *useraddr)
1771 {
1772 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1773 u16 from_channel, to_channel;
1774 u32 max_rx_in_use = 0;
1775 unsigned int i;
1776 int ret;
1777
1778 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1779 return -EOPNOTSUPP;
1780
1781 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1782 return -EFAULT;
1783
1784 dev->ethtool_ops->get_channels(dev, &curr);
1785
1786 if (channels.rx_count == curr.rx_count &&
1787 channels.tx_count == curr.tx_count &&
1788 channels.combined_count == curr.combined_count &&
1789 channels.other_count == curr.other_count)
1790 return 0;
1791
1792 /* ensure new counts are within the maximums */
1793 if (channels.rx_count > curr.max_rx ||
1794 channels.tx_count > curr.max_tx ||
1795 channels.combined_count > curr.max_combined ||
1796 channels.other_count > curr.max_other)
1797 return -EINVAL;
1798
1799 /* ensure there is at least one RX and one TX channel */
1800 if (!channels.combined_count &&
1801 (!channels.rx_count || !channels.tx_count))
1802 return -EINVAL;
1803
1804 /* ensure the new Rx count fits within the configured Rx flow
1805 * indirection table settings */
1806 if (netif_is_rxfh_configured(dev) &&
1807 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1808 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1809 return -EINVAL;
1810
1811 /* Disabling channels, query zero-copy AF_XDP sockets */
1812 from_channel = channels.combined_count +
1813 min(channels.rx_count, channels.tx_count);
1814 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1815 for (i = from_channel; i < to_channel; i++)
1816 if (xsk_get_pool_from_qid(dev, i))
1817 return -EINVAL;
1818
1819 ret = dev->ethtool_ops->set_channels(dev, &channels);
1820 if (!ret)
1821 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
1822 return ret;
1823 }
1824
ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)1825 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1826 {
1827 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1828
1829 if (!dev->ethtool_ops->get_pauseparam)
1830 return -EOPNOTSUPP;
1831
1832 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1833
1834 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1835 return -EFAULT;
1836 return 0;
1837 }
1838
ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)1839 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1840 {
1841 struct ethtool_pauseparam pauseparam;
1842 int ret;
1843
1844 if (!dev->ethtool_ops->set_pauseparam)
1845 return -EOPNOTSUPP;
1846
1847 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1848 return -EFAULT;
1849
1850 ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1851 if (!ret)
1852 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
1853 return ret;
1854 }
1855
ethtool_self_test(struct net_device *dev, char __user *useraddr)1856 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1857 {
1858 struct ethtool_test test;
1859 const struct ethtool_ops *ops = dev->ethtool_ops;
1860 u64 *data;
1861 int ret, test_len;
1862
1863 if (!ops->self_test || !ops->get_sset_count)
1864 return -EOPNOTSUPP;
1865
1866 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1867 if (test_len < 0)
1868 return test_len;
1869 WARN_ON(test_len == 0);
1870
1871 if (copy_from_user(&test, useraddr, sizeof(test)))
1872 return -EFAULT;
1873
1874 test.len = test_len;
1875 data = kcalloc(test_len, sizeof(u64), GFP_USER);
1876 if (!data)
1877 return -ENOMEM;
1878
1879 netif_testing_on(dev);
1880 ops->self_test(dev, &test, data);
1881 netif_testing_off(dev);
1882
1883 ret = -EFAULT;
1884 if (copy_to_user(useraddr, &test, sizeof(test)))
1885 goto out;
1886 useraddr += sizeof(test);
1887 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1888 goto out;
1889 ret = 0;
1890
1891 out:
1892 kfree(data);
1893 return ret;
1894 }
1895
ethtool_get_strings(struct net_device *dev, void __user *useraddr)1896 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1897 {
1898 struct ethtool_gstrings gstrings;
1899 u8 *data;
1900 int ret;
1901
1902 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1903 return -EFAULT;
1904
1905 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1906 if (ret < 0)
1907 return ret;
1908 if (ret > S32_MAX / ETH_GSTRING_LEN)
1909 return -ENOMEM;
1910 WARN_ON_ONCE(!ret);
1911
1912 gstrings.len = ret;
1913
1914 if (gstrings.len) {
1915 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1916 if (!data)
1917 return -ENOMEM;
1918
1919 __ethtool_get_strings(dev, gstrings.string_set, data);
1920 } else {
1921 data = NULL;
1922 }
1923
1924 ret = -EFAULT;
1925 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1926 goto out;
1927 useraddr += sizeof(gstrings);
1928 if (gstrings.len &&
1929 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1930 goto out;
1931 ret = 0;
1932
1933 out:
1934 vfree(data);
1935 return ret;
1936 }
1937
ethtool_phys_id(struct net_device *dev, void __user *useraddr)1938 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1939 {
1940 struct ethtool_value id;
1941 static bool busy;
1942 const struct ethtool_ops *ops = dev->ethtool_ops;
1943 int rc;
1944
1945 if (!ops->set_phys_id)
1946 return -EOPNOTSUPP;
1947
1948 if (busy)
1949 return -EBUSY;
1950
1951 if (copy_from_user(&id, useraddr, sizeof(id)))
1952 return -EFAULT;
1953
1954 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1955 if (rc < 0)
1956 return rc;
1957
1958 /* Drop the RTNL lock while waiting, but prevent reentry or
1959 * removal of the device.
1960 */
1961 busy = true;
1962 dev_hold(dev);
1963 rtnl_unlock();
1964
1965 if (rc == 0) {
1966 /* Driver will handle this itself */
1967 schedule_timeout_interruptible(
1968 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1969 } else {
1970 /* Driver expects to be called at twice the frequency in rc */
1971 int n = rc * 2, interval = HZ / n;
1972 u64 count = mul_u32_u32(n, id.data);
1973 u64 i = 0;
1974
1975 do {
1976 rtnl_lock();
1977 rc = ops->set_phys_id(dev,
1978 (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1979 rtnl_unlock();
1980 if (rc)
1981 break;
1982 schedule_timeout_interruptible(interval);
1983 } while (!signal_pending(current) && (!id.data || i < count));
1984 }
1985
1986 rtnl_lock();
1987 dev_put(dev);
1988 busy = false;
1989
1990 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1991 return rc;
1992 }
1993
ethtool_get_stats(struct net_device *dev, void __user *useraddr)1994 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1995 {
1996 struct ethtool_stats stats;
1997 const struct ethtool_ops *ops = dev->ethtool_ops;
1998 u64 *data;
1999 int ret, n_stats;
2000
2001 if (!ops->get_ethtool_stats || !ops->get_sset_count)
2002 return -EOPNOTSUPP;
2003
2004 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
2005 if (n_stats < 0)
2006 return n_stats;
2007 if (n_stats > S32_MAX / sizeof(u64))
2008 return -ENOMEM;
2009 WARN_ON_ONCE(!n_stats);
2010 if (copy_from_user(&stats, useraddr, sizeof(stats)))
2011 return -EFAULT;
2012
2013 stats.n_stats = n_stats;
2014
2015 if (n_stats) {
2016 data = vzalloc(array_size(n_stats, sizeof(u64)));
2017 if (!data)
2018 return -ENOMEM;
2019 ops->get_ethtool_stats(dev, &stats, data);
2020 } else {
2021 data = NULL;
2022 }
2023
2024 ret = -EFAULT;
2025 if (copy_to_user(useraddr, &stats, sizeof(stats)))
2026 goto out;
2027 useraddr += sizeof(stats);
2028 if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2029 goto out;
2030 ret = 0;
2031
2032 out:
2033 vfree(data);
2034 return ret;
2035 }
2036
ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)2037 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2038 {
2039 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
2040 const struct ethtool_ops *ops = dev->ethtool_ops;
2041 struct phy_device *phydev = dev->phydev;
2042 struct ethtool_stats stats;
2043 u64 *data;
2044 int ret, n_stats;
2045
2046 if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
2047 return -EOPNOTSUPP;
2048
2049 if (dev->phydev && !ops->get_ethtool_phy_stats &&
2050 phy_ops && phy_ops->get_sset_count)
2051 n_stats = phy_ops->get_sset_count(dev->phydev);
2052 else
2053 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
2054 if (n_stats < 0)
2055 return n_stats;
2056 if (n_stats > S32_MAX / sizeof(u64))
2057 return -ENOMEM;
2058 if (WARN_ON_ONCE(!n_stats))
2059 return -EOPNOTSUPP;
2060
2061 if (copy_from_user(&stats, useraddr, sizeof(stats)))
2062 return -EFAULT;
2063
2064 stats.n_stats = n_stats;
2065
2066 if (n_stats) {
2067 data = vzalloc(array_size(n_stats, sizeof(u64)));
2068 if (!data)
2069 return -ENOMEM;
2070
2071 if (dev->phydev && !ops->get_ethtool_phy_stats &&
2072 phy_ops && phy_ops->get_stats) {
2073 ret = phy_ops->get_stats(dev->phydev, &stats, data);
2074 if (ret < 0)
2075 goto out;
2076 } else {
2077 ops->get_ethtool_phy_stats(dev, &stats, data);
2078 }
2079 } else {
2080 data = NULL;
2081 }
2082
2083 ret = -EFAULT;
2084 if (copy_to_user(useraddr, &stats, sizeof(stats)))
2085 goto out;
2086 useraddr += sizeof(stats);
2087 if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2088 goto out;
2089 ret = 0;
2090
2091 out:
2092 vfree(data);
2093 return ret;
2094 }
2095
ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)2096 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2097 {
2098 struct ethtool_perm_addr epaddr;
2099
2100 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2101 return -EFAULT;
2102
2103 if (epaddr.size < dev->addr_len)
2104 return -ETOOSMALL;
2105 epaddr.size = dev->addr_len;
2106
2107 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2108 return -EFAULT;
2109 useraddr += sizeof(epaddr);
2110 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2111 return -EFAULT;
2112 return 0;
2113 }
2114
ethtool_get_value(struct net_device *dev, char __user *useraddr, u32 cmd, u32 (*actor)(struct net_device *))2115 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2116 u32 cmd, u32 (*actor)(struct net_device *))
2117 {
2118 struct ethtool_value edata = { .cmd = cmd };
2119
2120 if (!actor)
2121 return -EOPNOTSUPP;
2122
2123 edata.data = actor(dev);
2124
2125 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2126 return -EFAULT;
2127 return 0;
2128 }
2129
ethtool_set_value_void(struct net_device *dev, char __user *useraddr, void (*actor)(struct net_device *, u32))2130 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2131 void (*actor)(struct net_device *, u32))
2132 {
2133 struct ethtool_value edata;
2134
2135 if (!actor)
2136 return -EOPNOTSUPP;
2137
2138 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2139 return -EFAULT;
2140
2141 actor(dev, edata.data);
2142 return 0;
2143 }
2144
ethtool_set_value(struct net_device *dev, char __user *useraddr, int (*actor)(struct net_device *, u32))2145 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2146 int (*actor)(struct net_device *, u32))
2147 {
2148 struct ethtool_value edata;
2149
2150 if (!actor)
2151 return -EOPNOTSUPP;
2152
2153 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2154 return -EFAULT;
2155
2156 return actor(dev, edata.data);
2157 }
2158
ethtool_flash_device(struct net_device *dev, char __user *useraddr)2159 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2160 char __user *useraddr)
2161 {
2162 struct ethtool_flash efl;
2163
2164 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2165 return -EFAULT;
2166 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2167
2168 if (!dev->ethtool_ops->flash_device)
2169 return devlink_compat_flash_update(dev, efl.data);
2170
2171 return dev->ethtool_ops->flash_device(dev, &efl);
2172 }
2173
ethtool_set_dump(struct net_device *dev, void __user *useraddr)2174 static int ethtool_set_dump(struct net_device *dev,
2175 void __user *useraddr)
2176 {
2177 struct ethtool_dump dump;
2178
2179 if (!dev->ethtool_ops->set_dump)
2180 return -EOPNOTSUPP;
2181
2182 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2183 return -EFAULT;
2184
2185 return dev->ethtool_ops->set_dump(dev, &dump);
2186 }
2187
ethtool_get_dump_flag(struct net_device *dev, void __user *useraddr)2188 static int ethtool_get_dump_flag(struct net_device *dev,
2189 void __user *useraddr)
2190 {
2191 int ret;
2192 struct ethtool_dump dump;
2193 const struct ethtool_ops *ops = dev->ethtool_ops;
2194
2195 if (!ops->get_dump_flag)
2196 return -EOPNOTSUPP;
2197
2198 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2199 return -EFAULT;
2200
2201 ret = ops->get_dump_flag(dev, &dump);
2202 if (ret)
2203 return ret;
2204
2205 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2206 return -EFAULT;
2207 return 0;
2208 }
2209
ethtool_get_dump_data(struct net_device *dev, void __user *useraddr)2210 static int ethtool_get_dump_data(struct net_device *dev,
2211 void __user *useraddr)
2212 {
2213 int ret;
2214 __u32 len;
2215 struct ethtool_dump dump, tmp;
2216 const struct ethtool_ops *ops = dev->ethtool_ops;
2217 void *data = NULL;
2218
2219 if (!ops->get_dump_data || !ops->get_dump_flag)
2220 return -EOPNOTSUPP;
2221
2222 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2223 return -EFAULT;
2224
2225 memset(&tmp, 0, sizeof(tmp));
2226 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2227 ret = ops->get_dump_flag(dev, &tmp);
2228 if (ret)
2229 return ret;
2230
2231 len = min(tmp.len, dump.len);
2232 if (!len)
2233 return -EFAULT;
2234
2235 /* Don't ever let the driver think there's more space available
2236 * than it requested with .get_dump_flag().
2237 */
2238 dump.len = len;
2239
2240 /* Always allocate enough space to hold the whole thing so that the
2241 * driver does not need to check the length and bother with partial
2242 * dumping.
2243 */
2244 data = vzalloc(tmp.len);
2245 if (!data)
2246 return -ENOMEM;
2247 ret = ops->get_dump_data(dev, &dump, data);
2248 if (ret)
2249 goto out;
2250
2251 /* There are two sane possibilities:
2252 * 1. The driver's .get_dump_data() does not touch dump.len.
2253 * 2. Or it may set dump.len to how much it really writes, which
2254 * should be tmp.len (or len if it can do a partial dump).
2255 * In any case respond to userspace with the actual length of data
2256 * it's receiving.
2257 */
2258 WARN_ON(dump.len != len && dump.len != tmp.len);
2259 dump.len = len;
2260
2261 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2262 ret = -EFAULT;
2263 goto out;
2264 }
2265 useraddr += offsetof(struct ethtool_dump, data);
2266 if (copy_to_user(useraddr, data, len))
2267 ret = -EFAULT;
2268 out:
2269 vfree(data);
2270 return ret;
2271 }
2272
ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)2273 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2274 {
2275 struct ethtool_ts_info info;
2276 int err;
2277
2278 err = __ethtool_get_ts_info(dev, &info);
2279 if (err)
2280 return err;
2281
2282 if (copy_to_user(useraddr, &info, sizeof(info)))
2283 return -EFAULT;
2284
2285 return 0;
2286 }
2287
__ethtool_get_module_info(struct net_device *dev, struct ethtool_modinfo *modinfo)2288 static int __ethtool_get_module_info(struct net_device *dev,
2289 struct ethtool_modinfo *modinfo)
2290 {
2291 const struct ethtool_ops *ops = dev->ethtool_ops;
2292 struct phy_device *phydev = dev->phydev;
2293
2294 if (dev->sfp_bus)
2295 return sfp_get_module_info(dev->sfp_bus, modinfo);
2296
2297 if (phydev && phydev->drv && phydev->drv->module_info)
2298 return phydev->drv->module_info(phydev, modinfo);
2299
2300 if (ops->get_module_info)
2301 return ops->get_module_info(dev, modinfo);
2302
2303 return -EOPNOTSUPP;
2304 }
2305
ethtool_get_module_info(struct net_device *dev, void __user *useraddr)2306 static int ethtool_get_module_info(struct net_device *dev,
2307 void __user *useraddr)
2308 {
2309 int ret;
2310 struct ethtool_modinfo modinfo;
2311
2312 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2313 return -EFAULT;
2314
2315 ret = __ethtool_get_module_info(dev, &modinfo);
2316 if (ret)
2317 return ret;
2318
2319 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2320 return -EFAULT;
2321
2322 return 0;
2323 }
2324
__ethtool_get_module_eeprom(struct net_device *dev, struct ethtool_eeprom *ee, u8 *data)2325 static int __ethtool_get_module_eeprom(struct net_device *dev,
2326 struct ethtool_eeprom *ee, u8 *data)
2327 {
2328 const struct ethtool_ops *ops = dev->ethtool_ops;
2329 struct phy_device *phydev = dev->phydev;
2330
2331 if (dev->sfp_bus)
2332 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2333
2334 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2335 return phydev->drv->module_eeprom(phydev, ee, data);
2336
2337 if (ops->get_module_eeprom)
2338 return ops->get_module_eeprom(dev, ee, data);
2339
2340 return -EOPNOTSUPP;
2341 }
2342
ethtool_get_module_eeprom(struct net_device *dev, void __user *useraddr)2343 static int ethtool_get_module_eeprom(struct net_device *dev,
2344 void __user *useraddr)
2345 {
2346 int ret;
2347 struct ethtool_modinfo modinfo;
2348
2349 ret = __ethtool_get_module_info(dev, &modinfo);
2350 if (ret)
2351 return ret;
2352
2353 return ethtool_get_any_eeprom(dev, useraddr,
2354 __ethtool_get_module_eeprom,
2355 modinfo.eeprom_len);
2356 }
2357
ethtool_tunable_valid(const struct ethtool_tunable *tuna)2358 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2359 {
2360 switch (tuna->id) {
2361 case ETHTOOL_RX_COPYBREAK:
2362 case ETHTOOL_TX_COPYBREAK:
2363 if (tuna->len != sizeof(u32) ||
2364 tuna->type_id != ETHTOOL_TUNABLE_U32)
2365 return -EINVAL;
2366 break;
2367 case ETHTOOL_PFC_PREVENTION_TOUT:
2368 if (tuna->len != sizeof(u16) ||
2369 tuna->type_id != ETHTOOL_TUNABLE_U16)
2370 return -EINVAL;
2371 break;
2372 default:
2373 return -EINVAL;
2374 }
2375
2376 return 0;
2377 }
2378
ethtool_get_tunable(struct net_device *dev, void __user *useraddr)2379 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2380 {
2381 int ret;
2382 struct ethtool_tunable tuna;
2383 const struct ethtool_ops *ops = dev->ethtool_ops;
2384 void *data;
2385
2386 if (!ops->get_tunable)
2387 return -EOPNOTSUPP;
2388 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2389 return -EFAULT;
2390 ret = ethtool_tunable_valid(&tuna);
2391 if (ret)
2392 return ret;
2393 data = kzalloc(tuna.len, GFP_USER);
2394 if (!data)
2395 return -ENOMEM;
2396 ret = ops->get_tunable(dev, &tuna, data);
2397 if (ret)
2398 goto out;
2399 useraddr += sizeof(tuna);
2400 ret = -EFAULT;
2401 if (copy_to_user(useraddr, data, tuna.len))
2402 goto out;
2403 ret = 0;
2404
2405 out:
2406 kfree(data);
2407 return ret;
2408 }
2409
ethtool_set_tunable(struct net_device *dev, void __user *useraddr)2410 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2411 {
2412 int ret;
2413 struct ethtool_tunable tuna;
2414 const struct ethtool_ops *ops = dev->ethtool_ops;
2415 void *data;
2416
2417 if (!ops->set_tunable)
2418 return -EOPNOTSUPP;
2419 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2420 return -EFAULT;
2421 ret = ethtool_tunable_valid(&tuna);
2422 if (ret)
2423 return ret;
2424 useraddr += sizeof(tuna);
2425 data = memdup_user(useraddr, tuna.len);
2426 if (IS_ERR(data))
2427 return PTR_ERR(data);
2428 ret = ops->set_tunable(dev, &tuna, data);
2429
2430 kfree(data);
2431 return ret;
2432 }
2433
2434 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)2435 ethtool_get_per_queue_coalesce(struct net_device *dev,
2436 void __user *useraddr,
2437 struct ethtool_per_queue_op *per_queue_opt)
2438 {
2439 u32 bit;
2440 int ret;
2441 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2442
2443 if (!dev->ethtool_ops->get_per_queue_coalesce)
2444 return -EOPNOTSUPP;
2445
2446 useraddr += sizeof(*per_queue_opt);
2447
2448 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2449 MAX_NUM_QUEUE);
2450
2451 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2452 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2453
2454 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2455 if (ret != 0)
2456 return ret;
2457 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2458 return -EFAULT;
2459 useraddr += sizeof(coalesce);
2460 }
2461
2462 return 0;
2463 }
2464
2465 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)2466 ethtool_set_per_queue_coalesce(struct net_device *dev,
2467 void __user *useraddr,
2468 struct ethtool_per_queue_op *per_queue_opt)
2469 {
2470 u32 bit;
2471 int i, ret = 0;
2472 int n_queue;
2473 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2474 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2475
2476 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2477 (!dev->ethtool_ops->get_per_queue_coalesce))
2478 return -EOPNOTSUPP;
2479
2480 useraddr += sizeof(*per_queue_opt);
2481
2482 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2483 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2484 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2485 if (!backup)
2486 return -ENOMEM;
2487
2488 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2489 struct ethtool_coalesce coalesce;
2490
2491 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2492 if (ret != 0)
2493 goto roll_back;
2494
2495 tmp++;
2496
2497 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2498 ret = -EFAULT;
2499 goto roll_back;
2500 }
2501
2502 if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2503 ret = -EOPNOTSUPP;
2504 goto roll_back;
2505 }
2506
2507 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2508 if (ret != 0)
2509 goto roll_back;
2510
2511 useraddr += sizeof(coalesce);
2512 }
2513
2514 roll_back:
2515 if (ret != 0) {
2516 tmp = backup;
2517 for_each_set_bit(i, queue_mask, bit) {
2518 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2519 tmp++;
2520 }
2521 }
2522 kfree(backup);
2523
2524 return ret;
2525 }
2526
ethtool_set_per_queue(struct net_device *dev, void __user *useraddr, u32 sub_cmd)2527 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2528 void __user *useraddr, u32 sub_cmd)
2529 {
2530 struct ethtool_per_queue_op per_queue_opt;
2531
2532 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2533 return -EFAULT;
2534
2535 if (per_queue_opt.sub_command != sub_cmd)
2536 return -EINVAL;
2537
2538 switch (per_queue_opt.sub_command) {
2539 case ETHTOOL_GCOALESCE:
2540 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2541 case ETHTOOL_SCOALESCE:
2542 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2543 default:
2544 return -EOPNOTSUPP;
2545 };
2546 }
2547
ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)2548 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2549 {
2550 switch (tuna->id) {
2551 case ETHTOOL_PHY_DOWNSHIFT:
2552 case ETHTOOL_PHY_FAST_LINK_DOWN:
2553 if (tuna->len != sizeof(u8) ||
2554 tuna->type_id != ETHTOOL_TUNABLE_U8)
2555 return -EINVAL;
2556 break;
2557 case ETHTOOL_PHY_EDPD:
2558 if (tuna->len != sizeof(u16) ||
2559 tuna->type_id != ETHTOOL_TUNABLE_U16)
2560 return -EINVAL;
2561 break;
2562 default:
2563 return -EINVAL;
2564 }
2565
2566 return 0;
2567 }
2568
get_phy_tunable(struct net_device *dev, void __user *useraddr)2569 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2570 {
2571 struct phy_device *phydev = dev->phydev;
2572 struct ethtool_tunable tuna;
2573 bool phy_drv_tunable;
2574 void *data;
2575 int ret;
2576
2577 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2578 if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
2579 return -EOPNOTSUPP;
2580 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2581 return -EFAULT;
2582 ret = ethtool_phy_tunable_valid(&tuna);
2583 if (ret)
2584 return ret;
2585 data = kzalloc(tuna.len, GFP_USER);
2586 if (!data)
2587 return -ENOMEM;
2588 if (phy_drv_tunable) {
2589 mutex_lock(&phydev->lock);
2590 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2591 mutex_unlock(&phydev->lock);
2592 } else {
2593 ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
2594 }
2595 if (ret)
2596 goto out;
2597 useraddr += sizeof(tuna);
2598 ret = -EFAULT;
2599 if (copy_to_user(useraddr, data, tuna.len))
2600 goto out;
2601 ret = 0;
2602
2603 out:
2604 kfree(data);
2605 return ret;
2606 }
2607
set_phy_tunable(struct net_device *dev, void __user *useraddr)2608 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2609 {
2610 struct phy_device *phydev = dev->phydev;
2611 struct ethtool_tunable tuna;
2612 bool phy_drv_tunable;
2613 void *data;
2614 int ret;
2615
2616 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2617 if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
2618 return -EOPNOTSUPP;
2619 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2620 return -EFAULT;
2621 ret = ethtool_phy_tunable_valid(&tuna);
2622 if (ret)
2623 return ret;
2624 useraddr += sizeof(tuna);
2625 data = memdup_user(useraddr, tuna.len);
2626 if (IS_ERR(data))
2627 return PTR_ERR(data);
2628 if (phy_drv_tunable) {
2629 mutex_lock(&phydev->lock);
2630 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2631 mutex_unlock(&phydev->lock);
2632 } else {
2633 ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
2634 }
2635
2636 kfree(data);
2637 return ret;
2638 }
2639
ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)2640 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2641 {
2642 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2643 int rc;
2644
2645 if (!dev->ethtool_ops->get_fecparam)
2646 return -EOPNOTSUPP;
2647
2648 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2649 if (rc)
2650 return rc;
2651
2652 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2653 return -EFAULT;
2654 return 0;
2655 }
2656
ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)2657 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2658 {
2659 struct ethtool_fecparam fecparam;
2660
2661 if (!dev->ethtool_ops->set_fecparam)
2662 return -EOPNOTSUPP;
2663
2664 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2665 return -EFAULT;
2666
2667 return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2668 }
2669
2670 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
2671
dev_ethtool(struct net *net, struct ifreq *ifr)2672 int dev_ethtool(struct net *net, struct ifreq *ifr)
2673 {
2674 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2675 void __user *useraddr = ifr->ifr_data;
2676 u32 ethcmd, sub_cmd;
2677 int rc;
2678 netdev_features_t old_features;
2679
2680 if (!dev || !netif_device_present(dev))
2681 return -ENODEV;
2682
2683 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
2684 return -EFAULT;
2685
2686 if (ethcmd == ETHTOOL_PERQUEUE) {
2687 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2688 return -EFAULT;
2689 } else {
2690 sub_cmd = ethcmd;
2691 }
2692 /* Allow some commands to be done by anyone */
2693 switch (sub_cmd) {
2694 case ETHTOOL_GSET:
2695 case ETHTOOL_GDRVINFO:
2696 case ETHTOOL_GMSGLVL:
2697 case ETHTOOL_GLINK:
2698 case ETHTOOL_GCOALESCE:
2699 case ETHTOOL_GRINGPARAM:
2700 case ETHTOOL_GPAUSEPARAM:
2701 case ETHTOOL_GRXCSUM:
2702 case ETHTOOL_GTXCSUM:
2703 case ETHTOOL_GSG:
2704 case ETHTOOL_GSSET_INFO:
2705 case ETHTOOL_GSTRINGS:
2706 case ETHTOOL_GSTATS:
2707 case ETHTOOL_GPHYSTATS:
2708 case ETHTOOL_GTSO:
2709 case ETHTOOL_GPERMADDR:
2710 case ETHTOOL_GUFO:
2711 case ETHTOOL_GGSO:
2712 case ETHTOOL_GGRO:
2713 case ETHTOOL_GFLAGS:
2714 case ETHTOOL_GPFLAGS:
2715 case ETHTOOL_GRXFH:
2716 case ETHTOOL_GRXRINGS:
2717 case ETHTOOL_GRXCLSRLCNT:
2718 case ETHTOOL_GRXCLSRULE:
2719 case ETHTOOL_GRXCLSRLALL:
2720 case ETHTOOL_GRXFHINDIR:
2721 case ETHTOOL_GRSSH:
2722 case ETHTOOL_GFEATURES:
2723 case ETHTOOL_GCHANNELS:
2724 case ETHTOOL_GET_TS_INFO:
2725 case ETHTOOL_GEEE:
2726 case ETHTOOL_GTUNABLE:
2727 case ETHTOOL_PHY_GTUNABLE:
2728 case ETHTOOL_GLINKSETTINGS:
2729 case ETHTOOL_GFECPARAM:
2730 break;
2731 default:
2732 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2733 return -EPERM;
2734 }
2735
2736 if (dev->ethtool_ops->begin) {
2737 rc = dev->ethtool_ops->begin(dev);
2738 if (rc < 0)
2739 return rc;
2740 }
2741 old_features = dev->features;
2742
2743 switch (ethcmd) {
2744 case ETHTOOL_GSET:
2745 rc = ethtool_get_settings(dev, useraddr);
2746 break;
2747 case ETHTOOL_SSET:
2748 rc = ethtool_set_settings(dev, useraddr);
2749 break;
2750 case ETHTOOL_GDRVINFO:
2751 rc = ethtool_get_drvinfo(dev, useraddr);
2752 break;
2753 case ETHTOOL_GREGS:
2754 rc = ethtool_get_regs(dev, useraddr);
2755 break;
2756 case ETHTOOL_GWOL:
2757 rc = ethtool_get_wol(dev, useraddr);
2758 break;
2759 case ETHTOOL_SWOL:
2760 rc = ethtool_set_wol(dev, useraddr);
2761 break;
2762 case ETHTOOL_GMSGLVL:
2763 rc = ethtool_get_value(dev, useraddr, ethcmd,
2764 dev->ethtool_ops->get_msglevel);
2765 break;
2766 case ETHTOOL_SMSGLVL:
2767 rc = ethtool_set_value_void(dev, useraddr,
2768 dev->ethtool_ops->set_msglevel);
2769 if (!rc)
2770 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2771 break;
2772 case ETHTOOL_GEEE:
2773 rc = ethtool_get_eee(dev, useraddr);
2774 break;
2775 case ETHTOOL_SEEE:
2776 rc = ethtool_set_eee(dev, useraddr);
2777 break;
2778 case ETHTOOL_NWAY_RST:
2779 rc = ethtool_nway_reset(dev);
2780 break;
2781 case ETHTOOL_GLINK:
2782 rc = ethtool_get_link(dev, useraddr);
2783 break;
2784 case ETHTOOL_GEEPROM:
2785 rc = ethtool_get_eeprom(dev, useraddr);
2786 break;
2787 case ETHTOOL_SEEPROM:
2788 rc = ethtool_set_eeprom(dev, useraddr);
2789 break;
2790 case ETHTOOL_GCOALESCE:
2791 rc = ethtool_get_coalesce(dev, useraddr);
2792 break;
2793 case ETHTOOL_SCOALESCE:
2794 rc = ethtool_set_coalesce(dev, useraddr);
2795 break;
2796 case ETHTOOL_GRINGPARAM:
2797 rc = ethtool_get_ringparam(dev, useraddr);
2798 break;
2799 case ETHTOOL_SRINGPARAM:
2800 rc = ethtool_set_ringparam(dev, useraddr);
2801 break;
2802 case ETHTOOL_GPAUSEPARAM:
2803 rc = ethtool_get_pauseparam(dev, useraddr);
2804 break;
2805 case ETHTOOL_SPAUSEPARAM:
2806 rc = ethtool_set_pauseparam(dev, useraddr);
2807 break;
2808 case ETHTOOL_TEST:
2809 rc = ethtool_self_test(dev, useraddr);
2810 break;
2811 case ETHTOOL_GSTRINGS:
2812 rc = ethtool_get_strings(dev, useraddr);
2813 break;
2814 case ETHTOOL_PHYS_ID:
2815 rc = ethtool_phys_id(dev, useraddr);
2816 break;
2817 case ETHTOOL_GSTATS:
2818 rc = ethtool_get_stats(dev, useraddr);
2819 break;
2820 case ETHTOOL_GPERMADDR:
2821 rc = ethtool_get_perm_addr(dev, useraddr);
2822 break;
2823 case ETHTOOL_GFLAGS:
2824 rc = ethtool_get_value(dev, useraddr, ethcmd,
2825 __ethtool_get_flags);
2826 break;
2827 case ETHTOOL_SFLAGS:
2828 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2829 break;
2830 case ETHTOOL_GPFLAGS:
2831 rc = ethtool_get_value(dev, useraddr, ethcmd,
2832 dev->ethtool_ops->get_priv_flags);
2833 if (!rc)
2834 ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
2835 break;
2836 case ETHTOOL_SPFLAGS:
2837 rc = ethtool_set_value(dev, useraddr,
2838 dev->ethtool_ops->set_priv_flags);
2839 break;
2840 case ETHTOOL_GRXFH:
2841 case ETHTOOL_GRXRINGS:
2842 case ETHTOOL_GRXCLSRLCNT:
2843 case ETHTOOL_GRXCLSRULE:
2844 case ETHTOOL_GRXCLSRLALL:
2845 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2846 break;
2847 case ETHTOOL_SRXFH:
2848 case ETHTOOL_SRXCLSRLDEL:
2849 case ETHTOOL_SRXCLSRLINS:
2850 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2851 break;
2852 case ETHTOOL_FLASHDEV:
2853 rc = ethtool_flash_device(dev, useraddr);
2854 break;
2855 case ETHTOOL_RESET:
2856 rc = ethtool_reset(dev, useraddr);
2857 break;
2858 case ETHTOOL_GSSET_INFO:
2859 rc = ethtool_get_sset_info(dev, useraddr);
2860 break;
2861 case ETHTOOL_GRXFHINDIR:
2862 rc = ethtool_get_rxfh_indir(dev, useraddr);
2863 break;
2864 case ETHTOOL_SRXFHINDIR:
2865 rc = ethtool_set_rxfh_indir(dev, useraddr);
2866 break;
2867 case ETHTOOL_GRSSH:
2868 rc = ethtool_get_rxfh(dev, useraddr);
2869 break;
2870 case ETHTOOL_SRSSH:
2871 rc = ethtool_set_rxfh(dev, useraddr);
2872 break;
2873 case ETHTOOL_GFEATURES:
2874 rc = ethtool_get_features(dev, useraddr);
2875 break;
2876 case ETHTOOL_SFEATURES:
2877 rc = ethtool_set_features(dev, useraddr);
2878 break;
2879 case ETHTOOL_GTXCSUM:
2880 case ETHTOOL_GRXCSUM:
2881 case ETHTOOL_GSG:
2882 case ETHTOOL_GTSO:
2883 case ETHTOOL_GGSO:
2884 case ETHTOOL_GGRO:
2885 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2886 break;
2887 case ETHTOOL_STXCSUM:
2888 case ETHTOOL_SRXCSUM:
2889 case ETHTOOL_SSG:
2890 case ETHTOOL_STSO:
2891 case ETHTOOL_SGSO:
2892 case ETHTOOL_SGRO:
2893 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2894 break;
2895 case ETHTOOL_GCHANNELS:
2896 rc = ethtool_get_channels(dev, useraddr);
2897 break;
2898 case ETHTOOL_SCHANNELS:
2899 rc = ethtool_set_channels(dev, useraddr);
2900 break;
2901 case ETHTOOL_SET_DUMP:
2902 rc = ethtool_set_dump(dev, useraddr);
2903 break;
2904 case ETHTOOL_GET_DUMP_FLAG:
2905 rc = ethtool_get_dump_flag(dev, useraddr);
2906 break;
2907 case ETHTOOL_GET_DUMP_DATA:
2908 rc = ethtool_get_dump_data(dev, useraddr);
2909 break;
2910 case ETHTOOL_GET_TS_INFO:
2911 rc = ethtool_get_ts_info(dev, useraddr);
2912 break;
2913 case ETHTOOL_GMODULEINFO:
2914 rc = ethtool_get_module_info(dev, useraddr);
2915 break;
2916 case ETHTOOL_GMODULEEEPROM:
2917 rc = ethtool_get_module_eeprom(dev, useraddr);
2918 break;
2919 case ETHTOOL_GTUNABLE:
2920 rc = ethtool_get_tunable(dev, useraddr);
2921 break;
2922 case ETHTOOL_STUNABLE:
2923 rc = ethtool_set_tunable(dev, useraddr);
2924 break;
2925 case ETHTOOL_GPHYSTATS:
2926 rc = ethtool_get_phy_stats(dev, useraddr);
2927 break;
2928 case ETHTOOL_PERQUEUE:
2929 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2930 break;
2931 case ETHTOOL_GLINKSETTINGS:
2932 rc = ethtool_get_link_ksettings(dev, useraddr);
2933 break;
2934 case ETHTOOL_SLINKSETTINGS:
2935 rc = ethtool_set_link_ksettings(dev, useraddr);
2936 break;
2937 case ETHTOOL_PHY_GTUNABLE:
2938 rc = get_phy_tunable(dev, useraddr);
2939 break;
2940 case ETHTOOL_PHY_STUNABLE:
2941 rc = set_phy_tunable(dev, useraddr);
2942 break;
2943 case ETHTOOL_GFECPARAM:
2944 rc = ethtool_get_fecparam(dev, useraddr);
2945 break;
2946 case ETHTOOL_SFECPARAM:
2947 rc = ethtool_set_fecparam(dev, useraddr);
2948 break;
2949 default:
2950 rc = -EOPNOTSUPP;
2951 }
2952
2953 if (dev->ethtool_ops->complete)
2954 dev->ethtool_ops->complete(dev);
2955
2956 if (old_features != dev->features)
2957 netdev_features_change(dev);
2958
2959 return rc;
2960 }
2961
2962 struct ethtool_rx_flow_key {
2963 struct flow_dissector_key_basic basic;
2964 union {
2965 struct flow_dissector_key_ipv4_addrs ipv4;
2966 struct flow_dissector_key_ipv6_addrs ipv6;
2967 };
2968 struct flow_dissector_key_ports tp;
2969 struct flow_dissector_key_ip ip;
2970 struct flow_dissector_key_vlan vlan;
2971 struct flow_dissector_key_eth_addrs eth_addrs;
2972 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
2973
2974 struct ethtool_rx_flow_match {
2975 struct flow_dissector dissector;
2976 struct ethtool_rx_flow_key key;
2977 struct ethtool_rx_flow_key mask;
2978 };
2979
2980 struct ethtool_rx_flow_rule *
ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)2981 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
2982 {
2983 const struct ethtool_rx_flow_spec *fs = input->fs;
2984 static struct in6_addr zero_addr = {};
2985 struct ethtool_rx_flow_match *match;
2986 struct ethtool_rx_flow_rule *flow;
2987 struct flow_action_entry *act;
2988
2989 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
2990 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
2991 if (!flow)
2992 return ERR_PTR(-ENOMEM);
2993
2994 /* ethtool_rx supports only one single action per rule. */
2995 flow->rule = flow_rule_alloc(1);
2996 if (!flow->rule) {
2997 kfree(flow);
2998 return ERR_PTR(-ENOMEM);
2999 }
3000
3001 match = (struct ethtool_rx_flow_match *)flow->priv;
3002 flow->rule->match.dissector = &match->dissector;
3003 flow->rule->match.mask = &match->mask;
3004 flow->rule->match.key = &match->key;
3005
3006 match->mask.basic.n_proto = htons(0xffff);
3007
3008 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3009 case ETHER_FLOW: {
3010 const struct ethhdr *ether_spec, *ether_m_spec;
3011
3012 ether_spec = &fs->h_u.ether_spec;
3013 ether_m_spec = &fs->m_u.ether_spec;
3014
3015 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
3016 ether_addr_copy(match->key.eth_addrs.src,
3017 ether_spec->h_source);
3018 ether_addr_copy(match->mask.eth_addrs.src,
3019 ether_m_spec->h_source);
3020 }
3021 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
3022 ether_addr_copy(match->key.eth_addrs.dst,
3023 ether_spec->h_dest);
3024 ether_addr_copy(match->mask.eth_addrs.dst,
3025 ether_m_spec->h_dest);
3026 }
3027 if (ether_m_spec->h_proto) {
3028 match->key.basic.n_proto = ether_spec->h_proto;
3029 match->mask.basic.n_proto = ether_m_spec->h_proto;
3030 }
3031 }
3032 break;
3033 case TCP_V4_FLOW:
3034 case UDP_V4_FLOW: {
3035 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
3036
3037 match->key.basic.n_proto = htons(ETH_P_IP);
3038
3039 v4_spec = &fs->h_u.tcp_ip4_spec;
3040 v4_m_spec = &fs->m_u.tcp_ip4_spec;
3041
3042 if (v4_m_spec->ip4src) {
3043 match->key.ipv4.src = v4_spec->ip4src;
3044 match->mask.ipv4.src = v4_m_spec->ip4src;
3045 }
3046 if (v4_m_spec->ip4dst) {
3047 match->key.ipv4.dst = v4_spec->ip4dst;
3048 match->mask.ipv4.dst = v4_m_spec->ip4dst;
3049 }
3050 if (v4_m_spec->ip4src ||
3051 v4_m_spec->ip4dst) {
3052 match->dissector.used_keys |=
3053 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
3054 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
3055 offsetof(struct ethtool_rx_flow_key, ipv4);
3056 }
3057 if (v4_m_spec->psrc) {
3058 match->key.tp.src = v4_spec->psrc;
3059 match->mask.tp.src = v4_m_spec->psrc;
3060 }
3061 if (v4_m_spec->pdst) {
3062 match->key.tp.dst = v4_spec->pdst;
3063 match->mask.tp.dst = v4_m_spec->pdst;
3064 }
3065 if (v4_m_spec->psrc ||
3066 v4_m_spec->pdst) {
3067 match->dissector.used_keys |=
3068 BIT(FLOW_DISSECTOR_KEY_PORTS);
3069 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3070 offsetof(struct ethtool_rx_flow_key, tp);
3071 }
3072 if (v4_m_spec->tos) {
3073 match->key.ip.tos = v4_spec->tos;
3074 match->mask.ip.tos = v4_m_spec->tos;
3075 match->dissector.used_keys |=
3076 BIT(FLOW_DISSECTOR_KEY_IP);
3077 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3078 offsetof(struct ethtool_rx_flow_key, ip);
3079 }
3080 }
3081 break;
3082 case TCP_V6_FLOW:
3083 case UDP_V6_FLOW: {
3084 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
3085
3086 match->key.basic.n_proto = htons(ETH_P_IPV6);
3087
3088 v6_spec = &fs->h_u.tcp_ip6_spec;
3089 v6_m_spec = &fs->m_u.tcp_ip6_spec;
3090 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
3091 memcpy(&match->key.ipv6.src, v6_spec->ip6src,
3092 sizeof(match->key.ipv6.src));
3093 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
3094 sizeof(match->mask.ipv6.src));
3095 }
3096 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
3097 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
3098 sizeof(match->key.ipv6.dst));
3099 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
3100 sizeof(match->mask.ipv6.dst));
3101 }
3102 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
3103 memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
3104 match->dissector.used_keys |=
3105 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
3106 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
3107 offsetof(struct ethtool_rx_flow_key, ipv6);
3108 }
3109 if (v6_m_spec->psrc) {
3110 match->key.tp.src = v6_spec->psrc;
3111 match->mask.tp.src = v6_m_spec->psrc;
3112 }
3113 if (v6_m_spec->pdst) {
3114 match->key.tp.dst = v6_spec->pdst;
3115 match->mask.tp.dst = v6_m_spec->pdst;
3116 }
3117 if (v6_m_spec->psrc ||
3118 v6_m_spec->pdst) {
3119 match->dissector.used_keys |=
3120 BIT(FLOW_DISSECTOR_KEY_PORTS);
3121 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3122 offsetof(struct ethtool_rx_flow_key, tp);
3123 }
3124 if (v6_m_spec->tclass) {
3125 match->key.ip.tos = v6_spec->tclass;
3126 match->mask.ip.tos = v6_m_spec->tclass;
3127 match->dissector.used_keys |=
3128 BIT(FLOW_DISSECTOR_KEY_IP);
3129 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3130 offsetof(struct ethtool_rx_flow_key, ip);
3131 }
3132 }
3133 break;
3134 default:
3135 ethtool_rx_flow_rule_destroy(flow);
3136 return ERR_PTR(-EINVAL);
3137 }
3138
3139 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3140 case TCP_V4_FLOW:
3141 case TCP_V6_FLOW:
3142 match->key.basic.ip_proto = IPPROTO_TCP;
3143 match->mask.basic.ip_proto = 0xff;
3144 break;
3145 case UDP_V4_FLOW:
3146 case UDP_V6_FLOW:
3147 match->key.basic.ip_proto = IPPROTO_UDP;
3148 match->mask.basic.ip_proto = 0xff;
3149 break;
3150 }
3151
3152 match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
3153 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3154 offsetof(struct ethtool_rx_flow_key, basic);
3155
3156 if (fs->flow_type & FLOW_EXT) {
3157 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3158 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3159
3160 if (ext_m_spec->vlan_etype) {
3161 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3162 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3163 }
3164
3165 if (ext_m_spec->vlan_tci) {
3166 match->key.vlan.vlan_id =
3167 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3168 match->mask.vlan.vlan_id =
3169 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3170
3171 match->key.vlan.vlan_dei =
3172 !!(ext_h_spec->vlan_tci & htons(0x1000));
3173 match->mask.vlan.vlan_dei =
3174 !!(ext_m_spec->vlan_tci & htons(0x1000));
3175
3176 match->key.vlan.vlan_priority =
3177 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3178 match->mask.vlan.vlan_priority =
3179 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3180 }
3181
3182 if (ext_m_spec->vlan_etype ||
3183 ext_m_spec->vlan_tci) {
3184 match->dissector.used_keys |=
3185 BIT(FLOW_DISSECTOR_KEY_VLAN);
3186 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3187 offsetof(struct ethtool_rx_flow_key, vlan);
3188 }
3189 }
3190 if (fs->flow_type & FLOW_MAC_EXT) {
3191 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3192 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3193
3194 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3195 ETH_ALEN);
3196 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3197 ETH_ALEN);
3198
3199 match->dissector.used_keys |=
3200 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3201 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3202 offsetof(struct ethtool_rx_flow_key, eth_addrs);
3203 }
3204
3205 act = &flow->rule->action.entries[0];
3206 switch (fs->ring_cookie) {
3207 case RX_CLS_FLOW_DISC:
3208 act->id = FLOW_ACTION_DROP;
3209 break;
3210 case RX_CLS_FLOW_WAKE:
3211 act->id = FLOW_ACTION_WAKE;
3212 break;
3213 default:
3214 act->id = FLOW_ACTION_QUEUE;
3215 if (fs->flow_type & FLOW_RSS)
3216 act->queue.ctx = input->rss_ctx;
3217
3218 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3219 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3220 break;
3221 }
3222
3223 return flow;
3224 }
3225 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3226
ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)3227 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3228 {
3229 kfree(flow->rule);
3230 kfree(flow);
3231 }
3232 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);
3233