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