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