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drm/tests: hdmi: Fix memory leaks in drm_display_mode_from_cea_vic()
[drm/drm-misc.git] / net / ethtool / ioctl.c
blob65cfe76dafbe2eb36b6d1ad91f8a65c3de597c4a
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/etherdevice.h>
12 #include <linux/module.h>
13 #include <linux/types.h>
14 #include <linux/capability.h>
15 #include <linux/errno.h>
16 #include <linux/ethtool.h>
17 #include <linux/netdevice.h>
18 #include <linux/net_tstamp.h>
19 #include <linux/phy.h>
20 #include <linux/bitops.h>
21 #include <linux/uaccess.h>
22 #include <linux/vmalloc.h>
23 #include <linux/sfp.h>
24 #include <linux/slab.h>
25 #include <linux/rtnetlink.h>
26 #include <linux/sched/signal.h>
27 #include <linux/net.h>
28 #include <linux/pm_runtime.h>
29 #include <linux/utsname.h>
30 #include <net/devlink.h>
31 #include <net/ipv6.h>
32 #include <net/xdp_sock_drv.h>
33 #include <net/flow_offload.h>
34 #include <linux/ethtool_netlink.h>
35 #include "common.h"
36
37 /* State held across locks and calls for commands which have devlink fallback */
38 struct ethtool_devlink_compat {
39 struct devlink *devlink;
40 union {
41 struct ethtool_flash efl;
42 struct ethtool_drvinfo info;
43 };
44 };
45
46 static struct devlink *netdev_to_devlink_get(struct net_device *dev)
47 {
48 if (!dev->devlink_port)
49 return NULL;
50 return devlink_try_get(dev->devlink_port->devlink);
51 }
52
53 /*
54 * Some useful ethtool_ops methods that're device independent.
55 * If we find that all drivers want to do the same thing here,
56 * we can turn these into dev_() function calls.
57 */
58
59 u32 ethtool_op_get_link(struct net_device *dev)
60 {
61 /* Synchronize carrier state with link watch, see also rtnl_getlink() */
62 linkwatch_sync_dev(dev);
63
64 return netif_carrier_ok(dev) ? 1 : 0;
65 }
66 EXPORT_SYMBOL(ethtool_op_get_link);
67
68 int ethtool_op_get_ts_info(struct net_device *dev,
69 struct kernel_ethtool_ts_info *info)
70 {
71 info->so_timestamping =
72 SOF_TIMESTAMPING_TX_SOFTWARE |
73 SOF_TIMESTAMPING_RX_SOFTWARE |
74 SOF_TIMESTAMPING_SOFTWARE;
75 info->phc_index = -1;
76 return 0;
77 }
78 EXPORT_SYMBOL(ethtool_op_get_ts_info);
79
80 /* Handlers for each ethtool command */
81
82 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
83 {
84 struct ethtool_gfeatures cmd = {
85 .cmd = ETHTOOL_GFEATURES,
86 .size = ETHTOOL_DEV_FEATURE_WORDS,
87 };
88 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
89 u32 __user *sizeaddr;
90 u32 copy_size;
91 int i;
92
93 /* in case feature bits run out again */
94 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
95
96 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
97 features[i].available = (u32)(dev->hw_features >> (32 * i));
98 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
99 features[i].active = (u32)(dev->features >> (32 * i));
100 features[i].never_changed =
101 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
102 }
103
104 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
105 if (get_user(copy_size, sizeaddr))
106 return -EFAULT;
107
108 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
109 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
110
111 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
112 return -EFAULT;
113 useraddr += sizeof(cmd);
114 if (copy_to_user(useraddr, features,
115 array_size(copy_size, sizeof(*features))))
116 return -EFAULT;
117
118 return 0;
119 }
120
121 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
122 {
123 struct ethtool_sfeatures cmd;
124 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
125 netdev_features_t wanted = 0, valid = 0;
126 int i, ret = 0;
127
128 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
129 return -EFAULT;
130 useraddr += sizeof(cmd);
131
132 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
133 return -EINVAL;
134
135 if (copy_from_user(features, useraddr, sizeof(features)))
136 return -EFAULT;
137
138 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
139 valid |= (netdev_features_t)features[i].valid << (32 * i);
140 wanted |= (netdev_features_t)features[i].requested << (32 * i);
141 }
142
143 if (valid & ~NETIF_F_ETHTOOL_BITS)
144 return -EINVAL;
145
146 if (valid & ~dev->hw_features) {
147 valid &= dev->hw_features;
148 ret |= ETHTOOL_F_UNSUPPORTED;
149 }
150
151 dev->wanted_features &= ~valid;
152 dev->wanted_features |= wanted & valid;
153 __netdev_update_features(dev);
154
155 if ((dev->wanted_features ^ dev->features) & valid)
156 ret |= ETHTOOL_F_WISH;
157
158 return ret;
159 }
160
161 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
162 {
163 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
164 const struct ethtool_ops *ops = dev->ethtool_ops;
165
166 if (sset == ETH_SS_FEATURES)
167 return ARRAY_SIZE(netdev_features_strings);
168
169 if (sset == ETH_SS_RSS_HASH_FUNCS)
170 return ARRAY_SIZE(rss_hash_func_strings);
171
172 if (sset == ETH_SS_TUNABLES)
173 return ARRAY_SIZE(tunable_strings);
174
175 if (sset == ETH_SS_PHY_TUNABLES)
176 return ARRAY_SIZE(phy_tunable_strings);
177
178 if (sset == ETH_SS_PHY_STATS && dev->phydev &&
179 !ops->get_ethtool_phy_stats &&
180 phy_ops && phy_ops->get_sset_count)
181 return phy_ops->get_sset_count(dev->phydev);
182
183 if (sset == ETH_SS_LINK_MODES)
184 return __ETHTOOL_LINK_MODE_MASK_NBITS;
185
186 if (ops->get_sset_count && ops->get_strings)
187 return ops->get_sset_count(dev, sset);
188 else
189 return -EOPNOTSUPP;
190 }
191
192 static void __ethtool_get_strings(struct net_device *dev,
193 u32 stringset, u8 *data)
194 {
195 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
196 const struct ethtool_ops *ops = dev->ethtool_ops;
197
198 if (stringset == ETH_SS_FEATURES)
199 memcpy(data, netdev_features_strings,
200 sizeof(netdev_features_strings));
201 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
202 memcpy(data, rss_hash_func_strings,
203 sizeof(rss_hash_func_strings));
204 else if (stringset == ETH_SS_TUNABLES)
205 memcpy(data, tunable_strings, sizeof(tunable_strings));
206 else if (stringset == ETH_SS_PHY_TUNABLES)
207 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
208 else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
209 !ops->get_ethtool_phy_stats && phy_ops &&
210 phy_ops->get_strings)
211 phy_ops->get_strings(dev->phydev, data);
212 else if (stringset == ETH_SS_LINK_MODES)
213 memcpy(data, link_mode_names,
214 __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
215 else
216 /* ops->get_strings is valid because checked earlier */
217 ops->get_strings(dev, stringset, data);
218 }
219
220 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
221 {
222 /* feature masks of legacy discrete ethtool ops */
223
224 switch (eth_cmd) {
225 case ETHTOOL_GTXCSUM:
226 case ETHTOOL_STXCSUM:
227 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
228 NETIF_F_SCTP_CRC;
229 case ETHTOOL_GRXCSUM:
230 case ETHTOOL_SRXCSUM:
231 return NETIF_F_RXCSUM;
232 case ETHTOOL_GSG:
233 case ETHTOOL_SSG:
234 return NETIF_F_SG | NETIF_F_FRAGLIST;
235 case ETHTOOL_GTSO:
236 case ETHTOOL_STSO:
237 return NETIF_F_ALL_TSO;
238 case ETHTOOL_GGSO:
239 case ETHTOOL_SGSO:
240 return NETIF_F_GSO;
241 case ETHTOOL_GGRO:
242 case ETHTOOL_SGRO:
243 return NETIF_F_GRO;
244 default:
245 BUG();
246 }
247 }
248
249 static int ethtool_get_one_feature(struct net_device *dev,
250 char __user *useraddr, u32 ethcmd)
251 {
252 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
253 struct ethtool_value edata = {
254 .cmd = ethcmd,
255 .data = !!(dev->features & mask),
256 };
257
258 if (copy_to_user(useraddr, &edata, sizeof(edata)))
259 return -EFAULT;
260 return 0;
261 }
262
263 static int ethtool_set_one_feature(struct net_device *dev,
264 void __user *useraddr, u32 ethcmd)
265 {
266 struct ethtool_value edata;
267 netdev_features_t mask;
268
269 if (copy_from_user(&edata, useraddr, sizeof(edata)))
270 return -EFAULT;
271
272 mask = ethtool_get_feature_mask(ethcmd);
273 mask &= dev->hw_features;
274 if (!mask)
275 return -EOPNOTSUPP;
276
277 if (edata.data)
278 dev->wanted_features |= mask;
279 else
280 dev->wanted_features &= ~mask;
281
282 __netdev_update_features(dev);
283
284 return 0;
285 }
286
287 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
288 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
289 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
290 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
291 NETIF_F_RXHASH)
292
293 static u32 __ethtool_get_flags(struct net_device *dev)
294 {
295 u32 flags = 0;
296
297 if (dev->features & NETIF_F_LRO)
298 flags |= ETH_FLAG_LRO;
299 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
300 flags |= ETH_FLAG_RXVLAN;
301 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
302 flags |= ETH_FLAG_TXVLAN;
303 if (dev->features & NETIF_F_NTUPLE)
304 flags |= ETH_FLAG_NTUPLE;
305 if (dev->features & NETIF_F_RXHASH)
306 flags |= ETH_FLAG_RXHASH;
307
308 return flags;
309 }
310
311 static int __ethtool_set_flags(struct net_device *dev, u32 data)
312 {
313 netdev_features_t features = 0, changed;
314
315 if (data & ~ETH_ALL_FLAGS)
316 return -EINVAL;
317
318 if (data & ETH_FLAG_LRO)
319 features |= NETIF_F_LRO;
320 if (data & ETH_FLAG_RXVLAN)
321 features |= NETIF_F_HW_VLAN_CTAG_RX;
322 if (data & ETH_FLAG_TXVLAN)
323 features |= NETIF_F_HW_VLAN_CTAG_TX;
324 if (data & ETH_FLAG_NTUPLE)
325 features |= NETIF_F_NTUPLE;
326 if (data & ETH_FLAG_RXHASH)
327 features |= NETIF_F_RXHASH;
328
329 /* allow changing only bits set in hw_features */
330 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
331 if (changed & ~dev->hw_features)
332 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
333
334 dev->wanted_features =
335 (dev->wanted_features & ~changed) | (features & changed);
336
337 __netdev_update_features(dev);
338
339 return 0;
340 }
341
342 /* Given two link masks, AND them together and save the result in dst. */
343 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
344 struct ethtool_link_ksettings *src)
345 {
346 unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
347 unsigned int idx = 0;
348
349 for (; idx < size; idx++) {
350 dst->link_modes.supported[idx] &=
351 src->link_modes.supported[idx];
352 dst->link_modes.advertising[idx] &=
353 src->link_modes.advertising[idx];
354 }
355 }
356 EXPORT_SYMBOL(ethtool_intersect_link_masks);
357
358 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
359 u32 legacy_u32)
360 {
361 linkmode_zero(dst);
362 dst[0] = legacy_u32;
363 }
364 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
365
366 /* return false if src had higher bits set. lower bits always updated. */
367 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
368 const unsigned long *src)
369 {
370 *legacy_u32 = src[0];
371 return find_next_bit(src, __ETHTOOL_LINK_MODE_MASK_NBITS, 32) ==
372 __ETHTOOL_LINK_MODE_MASK_NBITS;
373 }
374 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
375
376 /* return false if ksettings link modes had higher bits
377 * set. legacy_settings always updated (best effort)
378 */
379 static bool
380 convert_link_ksettings_to_legacy_settings(
381 struct ethtool_cmd *legacy_settings,
382 const struct ethtool_link_ksettings *link_ksettings)
383 {
384 bool retval = true;
385
386 memset(legacy_settings, 0, sizeof(*legacy_settings));
387 /* this also clears the deprecated fields in legacy structure:
388 * __u8 transceiver;
389 * __u32 maxtxpkt;
390 * __u32 maxrxpkt;
391 */
392
393 retval &= ethtool_convert_link_mode_to_legacy_u32(
394 &legacy_settings->supported,
395 link_ksettings->link_modes.supported);
396 retval &= ethtool_convert_link_mode_to_legacy_u32(
397 &legacy_settings->advertising,
398 link_ksettings->link_modes.advertising);
399 retval &= ethtool_convert_link_mode_to_legacy_u32(
400 &legacy_settings->lp_advertising,
401 link_ksettings->link_modes.lp_advertising);
402 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
403 legacy_settings->duplex
404 = link_ksettings->base.duplex;
405 legacy_settings->port
406 = link_ksettings->base.port;
407 legacy_settings->phy_address
408 = link_ksettings->base.phy_address;
409 legacy_settings->autoneg
410 = link_ksettings->base.autoneg;
411 legacy_settings->mdio_support
412 = link_ksettings->base.mdio_support;
413 legacy_settings->eth_tp_mdix
414 = link_ksettings->base.eth_tp_mdix;
415 legacy_settings->eth_tp_mdix_ctrl
416 = link_ksettings->base.eth_tp_mdix_ctrl;
417 legacy_settings->transceiver
418 = link_ksettings->base.transceiver;
419 return retval;
420 }
421
422 /* number of 32-bit words to store the user's link mode bitmaps */
423 #define __ETHTOOL_LINK_MODE_MASK_NU32 \
424 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
425
426 /* layout of the struct passed from/to userland */
427 struct ethtool_link_usettings {
428 struct ethtool_link_settings base;
429 struct {
430 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
431 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
432 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
433 } link_modes;
434 };
435
436 /* Internal kernel helper to query a device ethtool_link_settings. */
437 int __ethtool_get_link_ksettings(struct net_device *dev,
438 struct ethtool_link_ksettings *link_ksettings)
439 {
440 ASSERT_RTNL();
441
442 if (!dev->ethtool_ops->get_link_ksettings)
443 return -EOPNOTSUPP;
444
445 if (!netif_device_present(dev))
446 return -ENODEV;
447
448 memset(link_ksettings, 0, sizeof(*link_ksettings));
449 return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
450 }
451 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
452
453 /* convert ethtool_link_usettings in user space to a kernel internal
454 * ethtool_link_ksettings. return 0 on success, errno on error.
455 */
456 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
457 const void __user *from)
458 {
459 struct ethtool_link_usettings link_usettings;
460
461 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
462 return -EFAULT;
463
464 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
465 bitmap_from_arr32(to->link_modes.supported,
466 link_usettings.link_modes.supported,
467 __ETHTOOL_LINK_MODE_MASK_NBITS);
468 bitmap_from_arr32(to->link_modes.advertising,
469 link_usettings.link_modes.advertising,
470 __ETHTOOL_LINK_MODE_MASK_NBITS);
471 bitmap_from_arr32(to->link_modes.lp_advertising,
472 link_usettings.link_modes.lp_advertising,
473 __ETHTOOL_LINK_MODE_MASK_NBITS);
474
475 return 0;
476 }
477
478 /* Check if the user is trying to change anything besides speed/duplex */
479 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
480 {
481 struct ethtool_link_settings base2 = {};
482
483 base2.speed = cmd->base.speed;
484 base2.port = PORT_OTHER;
485 base2.duplex = cmd->base.duplex;
486 base2.cmd = cmd->base.cmd;
487 base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
488
489 return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
490 bitmap_empty(cmd->link_modes.supported,
491 __ETHTOOL_LINK_MODE_MASK_NBITS) &&
492 bitmap_empty(cmd->link_modes.lp_advertising,
493 __ETHTOOL_LINK_MODE_MASK_NBITS);
494 }
495
496 /* convert a kernel internal ethtool_link_ksettings to
497 * ethtool_link_usettings in user space. return 0 on success, errno on
498 * error.
499 */
500 static int
501 store_link_ksettings_for_user(void __user *to,
502 const struct ethtool_link_ksettings *from)
503 {
504 struct ethtool_link_usettings link_usettings;
505
506 memcpy(&link_usettings, from, sizeof(link_usettings));
507 bitmap_to_arr32(link_usettings.link_modes.supported,
508 from->link_modes.supported,
509 __ETHTOOL_LINK_MODE_MASK_NBITS);
510 bitmap_to_arr32(link_usettings.link_modes.advertising,
511 from->link_modes.advertising,
512 __ETHTOOL_LINK_MODE_MASK_NBITS);
513 bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
514 from->link_modes.lp_advertising,
515 __ETHTOOL_LINK_MODE_MASK_NBITS);
516
517 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
518 return -EFAULT;
519
520 return 0;
521 }
522
523 /* Query device for its ethtool_link_settings. */
524 static int ethtool_get_link_ksettings(struct net_device *dev,
525 void __user *useraddr)
526 {
527 int err = 0;
528 struct ethtool_link_ksettings link_ksettings;
529
530 ASSERT_RTNL();
531 if (!dev->ethtool_ops->get_link_ksettings)
532 return -EOPNOTSUPP;
533
534 /* handle bitmap nbits handshake */
535 if (copy_from_user(&link_ksettings.base, useraddr,
536 sizeof(link_ksettings.base)))
537 return -EFAULT;
538
539 if (__ETHTOOL_LINK_MODE_MASK_NU32
540 != link_ksettings.base.link_mode_masks_nwords) {
541 /* wrong link mode nbits requested */
542 memset(&link_ksettings, 0, sizeof(link_ksettings));
543 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
544 /* send back number of words required as negative val */
545 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
546 "need too many bits for link modes!");
547 link_ksettings.base.link_mode_masks_nwords
548 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
549
550 /* copy the base fields back to user, not the link
551 * mode bitmaps
552 */
553 if (copy_to_user(useraddr, &link_ksettings.base,
554 sizeof(link_ksettings.base)))
555 return -EFAULT;
556
557 return 0;
558 }
559
560 /* handshake successful: user/kernel agree on
561 * link_mode_masks_nwords
562 */
563
564 memset(&link_ksettings, 0, sizeof(link_ksettings));
565 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
566 if (err < 0)
567 return err;
568
569 /* make sure we tell the right values to user */
570 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
571 link_ksettings.base.link_mode_masks_nwords
572 = __ETHTOOL_LINK_MODE_MASK_NU32;
573 link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
574 link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
575 link_ksettings.base.rate_matching = RATE_MATCH_NONE;
576
577 return store_link_ksettings_for_user(useraddr, &link_ksettings);
578 }
579
580 /* Update device ethtool_link_settings. */
581 static int ethtool_set_link_ksettings(struct net_device *dev,
582 void __user *useraddr)
583 {
584 struct ethtool_link_ksettings link_ksettings = {};
585 int err;
586
587 ASSERT_RTNL();
588
589 if (!dev->ethtool_ops->set_link_ksettings)
590 return -EOPNOTSUPP;
591
592 /* make sure nbits field has expected value */
593 if (copy_from_user(&link_ksettings.base, useraddr,
594 sizeof(link_ksettings.base)))
595 return -EFAULT;
596
597 if (__ETHTOOL_LINK_MODE_MASK_NU32
598 != link_ksettings.base.link_mode_masks_nwords)
599 return -EINVAL;
600
601 /* copy the whole structure, now that we know it has expected
602 * format
603 */
604 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
605 if (err)
606 return err;
607
608 /* re-check nwords field, just in case */
609 if (__ETHTOOL_LINK_MODE_MASK_NU32
610 != link_ksettings.base.link_mode_masks_nwords)
611 return -EINVAL;
612
613 if (link_ksettings.base.master_slave_cfg ||
614 link_ksettings.base.master_slave_state)
615 return -EINVAL;
616
617 err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
618 if (err >= 0) {
619 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
620 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
621 }
622 return err;
623 }
624
625 int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
626 const struct ethtool_link_ksettings *cmd,
627 u32 *dev_speed, u8 *dev_duplex)
628 {
629 u32 speed;
630 u8 duplex;
631
632 speed = cmd->base.speed;
633 duplex = cmd->base.duplex;
634 /* don't allow custom speed and duplex */
635 if (!ethtool_validate_speed(speed) ||
636 !ethtool_validate_duplex(duplex) ||
637 !ethtool_virtdev_validate_cmd(cmd))
638 return -EINVAL;
639 *dev_speed = speed;
640 *dev_duplex = duplex;
641
642 return 0;
643 }
644 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
645
646 /* Query device for its ethtool_cmd settings.
647 *
648 * Backward compatibility note: for compatibility with legacy ethtool, this is
649 * now implemented via get_link_ksettings. When driver reports higher link mode
650 * bits, a kernel warning is logged once (with name of 1st driver/device) to
651 * recommend user to upgrade ethtool, but the command is successful (only the
652 * lower link mode bits reported back to user). Deprecated fields from
653 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
654 */
655 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
656 {
657 struct ethtool_link_ksettings link_ksettings;
658 struct ethtool_cmd cmd;
659 int err;
660
661 ASSERT_RTNL();
662 if (!dev->ethtool_ops->get_link_ksettings)
663 return -EOPNOTSUPP;
664
665 if (dev->ethtool->module_fw_flash_in_progress)
666 return -EBUSY;
667
668 memset(&link_ksettings, 0, sizeof(link_ksettings));
669 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
670 if (err < 0)
671 return err;
672 convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
673
674 /* send a sensible cmd tag back to user */
675 cmd.cmd = ETHTOOL_GSET;
676
677 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
678 return -EFAULT;
679
680 return 0;
681 }
682
683 /* Update device link settings with given ethtool_cmd.
684 *
685 * Backward compatibility note: for compatibility with legacy ethtool, this is
686 * now always implemented via set_link_settings. When user's request updates
687 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
688 * warning is logged once (with name of 1st driver/device) to recommend user to
689 * upgrade ethtool, and the request is rejected.
690 */
691 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
692 {
693 struct ethtool_link_ksettings link_ksettings;
694 struct ethtool_cmd cmd;
695 int ret;
696
697 ASSERT_RTNL();
698
699 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
700 return -EFAULT;
701 if (!dev->ethtool_ops->set_link_ksettings)
702 return -EOPNOTSUPP;
703
704 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
705 return -EINVAL;
706 link_ksettings.base.link_mode_masks_nwords =
707 __ETHTOOL_LINK_MODE_MASK_NU32;
708 ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
709 if (ret >= 0) {
710 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
711 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
712 }
713 return ret;
714 }
715
716 static int
717 ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp)
718 {
719 const struct ethtool_ops *ops = dev->ethtool_ops;
720 struct device *parent = dev->dev.parent;
721
722 rsp->info.cmd = ETHTOOL_GDRVINFO;
723 strscpy(rsp->info.version, init_uts_ns.name.release,
724 sizeof(rsp->info.version));
725 if (ops->get_drvinfo) {
726 ops->get_drvinfo(dev, &rsp->info);
727 if (!rsp->info.bus_info[0] && parent)
728 strscpy(rsp->info.bus_info, dev_name(parent),
729 sizeof(rsp->info.bus_info));
730 if (!rsp->info.driver[0] && parent && parent->driver)
731 strscpy(rsp->info.driver, parent->driver->name,
732 sizeof(rsp->info.driver));
733 } else if (parent && parent->driver) {
734 strscpy(rsp->info.bus_info, dev_name(parent),
735 sizeof(rsp->info.bus_info));
736 strscpy(rsp->info.driver, parent->driver->name,
737 sizeof(rsp->info.driver));
738 } else if (dev->rtnl_link_ops) {
739 strscpy(rsp->info.driver, dev->rtnl_link_ops->kind,
740 sizeof(rsp->info.driver));
741 } else {
742 return -EOPNOTSUPP;
743 }
744
745 /*
746 * this method of obtaining string set info is deprecated;
747 * Use ETHTOOL_GSSET_INFO instead.
748 */
749 if (ops->get_sset_count) {
750 int rc;
751
752 rc = ops->get_sset_count(dev, ETH_SS_TEST);
753 if (rc >= 0)
754 rsp->info.testinfo_len = rc;
755 rc = ops->get_sset_count(dev, ETH_SS_STATS);
756 if (rc >= 0)
757 rsp->info.n_stats = rc;
758 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
759 if (rc >= 0)
760 rsp->info.n_priv_flags = rc;
761 }
762 if (ops->get_regs_len) {
763 int ret = ops->get_regs_len(dev);
764
765 if (ret > 0)
766 rsp->info.regdump_len = ret;
767 }
768
769 if (ops->get_eeprom_len)
770 rsp->info.eedump_len = ops->get_eeprom_len(dev);
771
772 if (!rsp->info.fw_version[0])
773 rsp->devlink = netdev_to_devlink_get(dev);
774
775 return 0;
776 }
777
778 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
779 void __user *useraddr)
780 {
781 struct ethtool_sset_info info;
782 u64 sset_mask;
783 int i, idx = 0, n_bits = 0, ret, rc;
784 u32 *info_buf = NULL;
785
786 if (copy_from_user(&info, useraddr, sizeof(info)))
787 return -EFAULT;
788
789 /* store copy of mask, because we zero struct later on */
790 sset_mask = info.sset_mask;
791 if (!sset_mask)
792 return 0;
793
794 /* calculate size of return buffer */
795 n_bits = hweight64(sset_mask);
796
797 memset(&info, 0, sizeof(info));
798 info.cmd = ETHTOOL_GSSET_INFO;
799
800 info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
801 if (!info_buf)
802 return -ENOMEM;
803
804 /*
805 * fill return buffer based on input bitmask and successful
806 * get_sset_count return
807 */
808 for (i = 0; i < 64; i++) {
809 if (!(sset_mask & (1ULL << i)))
810 continue;
811
812 rc = __ethtool_get_sset_count(dev, i);
813 if (rc >= 0) {
814 info.sset_mask |= (1ULL << i);
815 info_buf[idx++] = rc;
816 }
817 }
818
819 ret = -EFAULT;
820 if (copy_to_user(useraddr, &info, sizeof(info)))
821 goto out;
822
823 useraddr += offsetof(struct ethtool_sset_info, data);
824 if (copy_to_user(useraddr, info_buf, array_size(idx, sizeof(u32))))
825 goto out;
826
827 ret = 0;
828
829 out:
830 kfree(info_buf);
831 return ret;
832 }
833
834 static noinline_for_stack int
835 ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
836 const struct compat_ethtool_rxnfc __user *useraddr,
837 size_t size)
838 {
839 struct compat_ethtool_rxnfc crxnfc = {};
840
841 /* We expect there to be holes between fs.m_ext and
842 * fs.ring_cookie and at the end of fs, but nowhere else.
843 * On non-x86, no conversion should be needed.
844 */
845 BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) &&
846 sizeof(struct compat_ethtool_rxnfc) !=
847 sizeof(struct ethtool_rxnfc));
848 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
849 sizeof(useraddr->fs.m_ext) !=
850 offsetof(struct ethtool_rxnfc, fs.m_ext) +
851 sizeof(rxnfc->fs.m_ext));
852 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) -
853 offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
854 offsetof(struct ethtool_rxnfc, fs.location) -
855 offsetof(struct ethtool_rxnfc, fs.ring_cookie));
856
857 if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc))))
858 return -EFAULT;
859
860 *rxnfc = (struct ethtool_rxnfc) {
861 .cmd = crxnfc.cmd,
862 .flow_type = crxnfc.flow_type,
863 .data = crxnfc.data,
864 .fs = {
865 .flow_type = crxnfc.fs.flow_type,
866 .h_u = crxnfc.fs.h_u,
867 .h_ext = crxnfc.fs.h_ext,
868 .m_u = crxnfc.fs.m_u,
869 .m_ext = crxnfc.fs.m_ext,
870 .ring_cookie = crxnfc.fs.ring_cookie,
871 .location = crxnfc.fs.location,
872 },
873 .rule_cnt = crxnfc.rule_cnt,
874 };
875
876 return 0;
877 }
878
879 static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc,
880 const void __user *useraddr,
881 size_t size)
882 {
883 if (compat_need_64bit_alignment_fixup())
884 return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size);
885
886 if (copy_from_user(rxnfc, useraddr, size))
887 return -EFAULT;
888
889 return 0;
890 }
891
892 static int ethtool_rxnfc_copy_to_compat(void __user *useraddr,
893 const struct ethtool_rxnfc *rxnfc,
894 size_t size, const u32 *rule_buf)
895 {
896 struct compat_ethtool_rxnfc crxnfc;
897
898 memset(&crxnfc, 0, sizeof(crxnfc));
899 crxnfc = (struct compat_ethtool_rxnfc) {
900 .cmd = rxnfc->cmd,
901 .flow_type = rxnfc->flow_type,
902 .data = rxnfc->data,
903 .fs = {
904 .flow_type = rxnfc->fs.flow_type,
905 .h_u = rxnfc->fs.h_u,
906 .h_ext = rxnfc->fs.h_ext,
907 .m_u = rxnfc->fs.m_u,
908 .m_ext = rxnfc->fs.m_ext,
909 .ring_cookie = rxnfc->fs.ring_cookie,
910 .location = rxnfc->fs.location,
911 },
912 .rule_cnt = rxnfc->rule_cnt,
913 };
914
915 if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc))))
916 return -EFAULT;
917
918 return 0;
919 }
920
921 static int ethtool_rxnfc_copy_struct(u32 cmd, struct ethtool_rxnfc *info,
922 size_t *info_size, void __user *useraddr)
923 {
924 /* struct ethtool_rxnfc was originally defined for
925 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
926 * members. User-space might still be using that
927 * definition.
928 */
929 if (cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH)
930 *info_size = (offsetof(struct ethtool_rxnfc, data) +
931 sizeof(info->data));
932
933 if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
934 return -EFAULT;
935
936 if ((cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH) && info->flow_type & FLOW_RSS) {
937 *info_size = sizeof(*info);
938 if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
939 return -EFAULT;
940 /* Since malicious users may modify the original data,
941 * we need to check whether FLOW_RSS is still requested.
942 */
943 if (!(info->flow_type & FLOW_RSS))
944 return -EINVAL;
945 }
946
947 if (info->cmd != cmd)
948 return -EINVAL;
949
950 return 0;
951 }
952
953 static int ethtool_rxnfc_copy_to_user(void __user *useraddr,
954 const struct ethtool_rxnfc *rxnfc,
955 size_t size, const u32 *rule_buf)
956 {
957 int ret;
958
959 if (compat_need_64bit_alignment_fixup()) {
960 ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size,
961 rule_buf);
962 useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs);
963 } else {
964 ret = copy_to_user(useraddr, rxnfc, size);
965 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
966 }
967
968 if (ret)
969 return -EFAULT;
970
971 if (rule_buf) {
972 if (copy_to_user(useraddr, rule_buf,
973 rxnfc->rule_cnt * sizeof(u32)))
974 return -EFAULT;
975 }
976
977 return 0;
978 }
979
980 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
981 u32 cmd, void __user *useraddr)
982 {
983 const struct ethtool_ops *ops = dev->ethtool_ops;
984 struct ethtool_rxnfc info;
985 size_t info_size = sizeof(info);
986 int rc;
987
988 if (!ops->set_rxnfc)
989 return -EOPNOTSUPP;
990
991 rc = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
992 if (rc)
993 return rc;
994
995 if (ops->get_rxfh) {
996 struct ethtool_rxfh_param rxfh = {};
997
998 rc = ops->get_rxfh(dev, &rxfh);
999 if (rc)
1000 return rc;
1001
1002 /* Sanity check: if symmetric-xor is set, then:
1003 * 1 - no other fields besides IP src/dst and/or L4 src/dst
1004 * 2 - If src is set, dst must also be set
1005 */
1006 if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
1007 ((info.data & ~(RXH_IP_SRC | RXH_IP_DST |
1008 RXH_L4_B_0_1 | RXH_L4_B_2_3)) ||
1009 (!!(info.data & RXH_IP_SRC) ^ !!(info.data & RXH_IP_DST)) ||
1010 (!!(info.data & RXH_L4_B_0_1) ^ !!(info.data & RXH_L4_B_2_3))))
1011 return -EINVAL;
1012 }
1013
1014 rc = ops->set_rxnfc(dev, &info);
1015 if (rc)
1016 return rc;
1017
1018 if (cmd == ETHTOOL_SRXCLSRLINS &&
1019 ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
1020 return -EFAULT;
1021
1022 return 0;
1023 }
1024
1025 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1026 u32 cmd, void __user *useraddr)
1027 {
1028 struct ethtool_rxnfc info;
1029 size_t info_size = sizeof(info);
1030 const struct ethtool_ops *ops = dev->ethtool_ops;
1031 int ret;
1032 void *rule_buf = NULL;
1033
1034 if (!ops->get_rxnfc)
1035 return -EOPNOTSUPP;
1036
1037 ret = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
1038 if (ret)
1039 return ret;
1040
1041 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1042 if (info.rule_cnt > 0) {
1043 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1044 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
1045 GFP_USER);
1046 if (!rule_buf)
1047 return -ENOMEM;
1048 }
1049 }
1050
1051 ret = ops->get_rxnfc(dev, &info, rule_buf);
1052 if (ret < 0)
1053 goto err_out;
1054
1055 ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
1056 err_out:
1057 kfree(rule_buf);
1058
1059 return ret;
1060 }
1061
1062 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1063 struct ethtool_rxnfc *rx_rings,
1064 u32 size)
1065 {
1066 int i;
1067
1068 if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0]))))
1069 return -EFAULT;
1070
1071 /* Validate ring indices */
1072 for (i = 0; i < size; i++)
1073 if (indir[i] >= rx_rings->data)
1074 return -EINVAL;
1075
1076 return 0;
1077 }
1078
1079 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1080
1081 void netdev_rss_key_fill(void *buffer, size_t len)
1082 {
1083 BUG_ON(len > sizeof(netdev_rss_key));
1084 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1085 memcpy(buffer, netdev_rss_key, len);
1086 }
1087 EXPORT_SYMBOL(netdev_rss_key_fill);
1088
1089 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1090 void __user *useraddr)
1091 {
1092 struct ethtool_rxfh_param rxfh = {};
1093 u32 user_size;
1094 int ret;
1095
1096 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1097 !dev->ethtool_ops->get_rxfh)
1098 return -EOPNOTSUPP;
1099 rxfh.indir_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1100 if (rxfh.indir_size == 0)
1101 return -EOPNOTSUPP;
1102
1103 if (copy_from_user(&user_size,
1104 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1105 sizeof(user_size)))
1106 return -EFAULT;
1107
1108 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1109 &rxfh.indir_size, sizeof(rxfh.indir_size)))
1110 return -EFAULT;
1111
1112 /* If the user buffer size is 0, this is just a query for the
1113 * device table size. Otherwise, if it's smaller than the
1114 * device table size it's an error.
1115 */
1116 if (user_size < rxfh.indir_size)
1117 return user_size == 0 ? 0 : -EINVAL;
1118
1119 rxfh.indir = kcalloc(rxfh.indir_size, sizeof(rxfh.indir[0]), GFP_USER);
1120 if (!rxfh.indir)
1121 return -ENOMEM;
1122
1123 ret = dev->ethtool_ops->get_rxfh(dev, &rxfh);
1124 if (ret)
1125 goto out;
1126 if (copy_to_user(useraddr +
1127 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1128 rxfh.indir, rxfh.indir_size * sizeof(*rxfh.indir)))
1129 ret = -EFAULT;
1130
1131 out:
1132 kfree(rxfh.indir);
1133 return ret;
1134 }
1135
1136 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1137 void __user *useraddr)
1138 {
1139 const struct ethtool_ops *ops = dev->ethtool_ops;
1140 struct ethtool_rxfh_param rxfh_dev = {};
1141 struct netlink_ext_ack *extack = NULL;
1142 struct ethtool_rxnfc rx_rings;
1143 u32 user_size, i;
1144 int ret;
1145 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1146
1147 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1148 !ops->get_rxnfc)
1149 return -EOPNOTSUPP;
1150
1151 rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1152 if (rxfh_dev.indir_size == 0)
1153 return -EOPNOTSUPP;
1154
1155 if (copy_from_user(&user_size,
1156 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1157 sizeof(user_size)))
1158 return -EFAULT;
1159
1160 if (user_size != 0 && user_size != rxfh_dev.indir_size)
1161 return -EINVAL;
1162
1163 rxfh_dev.indir = kcalloc(rxfh_dev.indir_size,
1164 sizeof(rxfh_dev.indir[0]), GFP_USER);
1165 if (!rxfh_dev.indir)
1166 return -ENOMEM;
1167
1168 rx_rings.cmd = ETHTOOL_GRXRINGS;
1169 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1170 if (ret)
1171 goto out;
1172
1173 if (user_size == 0) {
1174 u32 *indir = rxfh_dev.indir;
1175
1176 for (i = 0; i < rxfh_dev.indir_size; i++)
1177 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1178 } else {
1179 ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1180 useraddr + ringidx_offset,
1181 &rx_rings,
1182 rxfh_dev.indir_size);
1183 if (ret)
1184 goto out;
1185 }
1186
1187 rxfh_dev.hfunc = ETH_RSS_HASH_NO_CHANGE;
1188 ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1189 if (ret)
1190 goto out;
1191
1192 /* indicate whether rxfh was set to default */
1193 if (user_size == 0)
1194 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1195 else
1196 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1197
1198 out:
1199 kfree(rxfh_dev.indir);
1200 return ret;
1201 }
1202
1203 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1204 void __user *useraddr)
1205 {
1206 const struct ethtool_ops *ops = dev->ethtool_ops;
1207 struct ethtool_rxfh_param rxfh_dev = {};
1208 u32 user_indir_size, user_key_size;
1209 struct ethtool_rxfh_context *ctx;
1210 struct ethtool_rxfh rxfh;
1211 u32 indir_bytes;
1212 u8 *rss_config;
1213 u32 total_size;
1214 int ret;
1215
1216 if (!ops->get_rxfh)
1217 return -EOPNOTSUPP;
1218
1219 if (ops->get_rxfh_indir_size)
1220 rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1221 if (ops->get_rxfh_key_size)
1222 rxfh_dev.key_size = ops->get_rxfh_key_size(dev);
1223
1224 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1225 return -EFAULT;
1226 user_indir_size = rxfh.indir_size;
1227 user_key_size = rxfh.key_size;
1228
1229 /* Check that reserved fields are 0 for now */
1230 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1231 return -EINVAL;
1232 /* Most drivers don't handle rss_context, check it's 0 as well */
1233 if (rxfh.rss_context && !(ops->cap_rss_ctx_supported ||
1234 ops->create_rxfh_context))
1235 return -EOPNOTSUPP;
1236
1237 rxfh.indir_size = rxfh_dev.indir_size;
1238 rxfh.key_size = rxfh_dev.key_size;
1239 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1240 return -EFAULT;
1241
1242 if ((user_indir_size && user_indir_size != rxfh_dev.indir_size) ||
1243 (user_key_size && user_key_size != rxfh_dev.key_size))
1244 return -EINVAL;
1245
1246 indir_bytes = user_indir_size * sizeof(rxfh_dev.indir[0]);
1247 total_size = indir_bytes + user_key_size;
1248 rss_config = kzalloc(total_size, GFP_USER);
1249 if (!rss_config)
1250 return -ENOMEM;
1251
1252 if (user_indir_size)
1253 rxfh_dev.indir = (u32 *)rss_config;
1254
1255 if (user_key_size)
1256 rxfh_dev.key = rss_config + indir_bytes;
1257
1258 if (rxfh.rss_context) {
1259 ctx = xa_load(&dev->ethtool->rss_ctx, rxfh.rss_context);
1260 if (!ctx) {
1261 ret = -ENOENT;
1262 goto out;
1263 }
1264 if (rxfh_dev.indir)
1265 memcpy(rxfh_dev.indir, ethtool_rxfh_context_indir(ctx),
1266 indir_bytes);
1267 if (!ops->rxfh_per_ctx_key) {
1268 rxfh_dev.key_size = 0;
1269 } else {
1270 if (rxfh_dev.key)
1271 memcpy(rxfh_dev.key,
1272 ethtool_rxfh_context_key(ctx),
1273 user_key_size);
1274 rxfh_dev.hfunc = ctx->hfunc;
1275 }
1276 rxfh_dev.input_xfrm = ctx->input_xfrm;
1277 ret = 0;
1278 } else {
1279 ret = dev->ethtool_ops->get_rxfh(dev, &rxfh_dev);
1280 if (ret)
1281 goto out;
1282 }
1283
1284 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1285 &rxfh_dev.hfunc, sizeof(rxfh.hfunc))) {
1286 ret = -EFAULT;
1287 } else if (copy_to_user(useraddr +
1288 offsetof(struct ethtool_rxfh, input_xfrm),
1289 &rxfh_dev.input_xfrm,
1290 sizeof(rxfh.input_xfrm))) {
1291 ret = -EFAULT;
1292 } else if (copy_to_user(useraddr +
1293 offsetof(struct ethtool_rxfh, key_size),
1294 &rxfh_dev.key_size,
1295 sizeof(rxfh.key_size))) {
1296 ret = -EFAULT;
1297 } else if (copy_to_user(useraddr +
1298 offsetof(struct ethtool_rxfh, rss_config[0]),
1299 rss_config, total_size)) {
1300 ret = -EFAULT;
1301 }
1302 out:
1303 kfree(rss_config);
1304
1305 return ret;
1306 }
1307
1308 static struct ethtool_rxfh_context *
1309 ethtool_rxfh_ctx_alloc(const struct ethtool_ops *ops,
1310 u32 indir_size, u32 key_size)
1311 {
1312 size_t indir_bytes, flex_len, key_off, size;
1313 struct ethtool_rxfh_context *ctx;
1314 u32 priv_bytes, indir_max;
1315 u16 key_max;
1316
1317 key_max = max(key_size, ops->rxfh_key_space);
1318 indir_max = max(indir_size, ops->rxfh_indir_space);
1319
1320 priv_bytes = ALIGN(ops->rxfh_priv_size, sizeof(u32));
1321 indir_bytes = array_size(indir_max, sizeof(u32));
1322
1323 key_off = size_add(priv_bytes, indir_bytes);
1324 flex_len = size_add(key_off, key_max);
1325 size = struct_size_t(struct ethtool_rxfh_context, data, flex_len);
1326
1327 ctx = kzalloc(size, GFP_KERNEL_ACCOUNT);
1328 if (!ctx)
1329 return NULL;
1330
1331 ctx->indir_size = indir_size;
1332 ctx->key_size = key_size;
1333 ctx->key_off = key_off;
1334 ctx->priv_size = ops->rxfh_priv_size;
1335
1336 ctx->hfunc = ETH_RSS_HASH_NO_CHANGE;
1337 ctx->input_xfrm = RXH_XFRM_NO_CHANGE;
1338
1339 return ctx;
1340 }
1341
1342 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1343 void __user *useraddr)
1344 {
1345 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1346 const struct ethtool_ops *ops = dev->ethtool_ops;
1347 u32 dev_indir_size = 0, dev_key_size = 0, i;
1348 u32 user_indir_len = 0, indir_bytes = 0;
1349 struct ethtool_rxfh_param rxfh_dev = {};
1350 struct ethtool_rxfh_context *ctx = NULL;
1351 struct netlink_ext_ack *extack = NULL;
1352 struct ethtool_rxnfc rx_rings;
1353 struct ethtool_rxfh rxfh;
1354 bool locked = false; /* dev->ethtool->rss_lock taken */
1355 bool create = false;
1356 u8 *rss_config;
1357 int ret;
1358
1359 if (!ops->get_rxnfc || !ops->set_rxfh)
1360 return -EOPNOTSUPP;
1361
1362 if (ops->get_rxfh_indir_size)
1363 dev_indir_size = ops->get_rxfh_indir_size(dev);
1364 if (ops->get_rxfh_key_size)
1365 dev_key_size = ops->get_rxfh_key_size(dev);
1366
1367 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1368 return -EFAULT;
1369
1370 /* Check that reserved fields are 0 for now */
1371 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1372 return -EINVAL;
1373 /* Most drivers don't handle rss_context, check it's 0 as well */
1374 if (rxfh.rss_context && !(ops->cap_rss_ctx_supported ||
1375 ops->create_rxfh_context))
1376 return -EOPNOTSUPP;
1377 /* Check input data transformation capabilities */
1378 if (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_SYM_XOR &&
1379 rxfh.input_xfrm != RXH_XFRM_NO_CHANGE)
1380 return -EINVAL;
1381 if (rxfh.input_xfrm != RXH_XFRM_NO_CHANGE &&
1382 (rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
1383 !ops->cap_rss_sym_xor_supported)
1384 return -EOPNOTSUPP;
1385 create = rxfh.rss_context == ETH_RXFH_CONTEXT_ALLOC;
1386
1387 if ((rxfh.indir_size &&
1388 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1389 rxfh.indir_size != dev_indir_size) ||
1390 (rxfh.key_size && rxfh.key_size != dev_key_size))
1391 return -EINVAL;
1392
1393 /* Must request at least one change: indir size, hash key, function
1394 * or input transformation.
1395 * There's no need for any of it in case of context creation.
1396 */
1397 if (!create &&
1398 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1399 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE &&
1400 rxfh.input_xfrm == RXH_XFRM_NO_CHANGE))
1401 return -EINVAL;
1402
1403 indir_bytes = dev_indir_size * sizeof(rxfh_dev.indir[0]);
1404
1405 /* Check settings which may be global rather than per RSS-context */
1406 if (rxfh.rss_context && !ops->rxfh_per_ctx_key)
1407 if (rxfh.key_size ||
1408 (rxfh.hfunc && rxfh.hfunc != ETH_RSS_HASH_NO_CHANGE) ||
1409 (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_NO_CHANGE))
1410 return -EOPNOTSUPP;
1411
1412 rss_config = kzalloc(indir_bytes + dev_key_size, GFP_USER);
1413 if (!rss_config)
1414 return -ENOMEM;
1415
1416 rx_rings.cmd = ETHTOOL_GRXRINGS;
1417 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1418 if (ret)
1419 goto out;
1420
1421 /* rxfh.indir_size == 0 means reset the indir table to default (master
1422 * context) or delete the context (other RSS contexts).
1423 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1424 */
1425 if (rxfh.indir_size &&
1426 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1427 user_indir_len = indir_bytes;
1428 rxfh_dev.indir = (u32 *)rss_config;
1429 rxfh_dev.indir_size = dev_indir_size;
1430 ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1431 useraddr + rss_cfg_offset,
1432 &rx_rings,
1433 rxfh.indir_size);
1434 if (ret)
1435 goto out;
1436 } else if (rxfh.indir_size == 0) {
1437 if (rxfh.rss_context == 0) {
1438 u32 *indir;
1439
1440 rxfh_dev.indir = (u32 *)rss_config;
1441 rxfh_dev.indir_size = dev_indir_size;
1442 indir = rxfh_dev.indir;
1443 for (i = 0; i < dev_indir_size; i++)
1444 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1445 } else {
1446 rxfh_dev.rss_delete = true;
1447 }
1448 }
1449
1450 if (rxfh.key_size) {
1451 rxfh_dev.key_size = dev_key_size;
1452 rxfh_dev.key = rss_config + indir_bytes;
1453 if (copy_from_user(rxfh_dev.key,
1454 useraddr + rss_cfg_offset + user_indir_len,
1455 rxfh.key_size)) {
1456 ret = -EFAULT;
1457 goto out;
1458 }
1459 }
1460
1461 if (rxfh.rss_context) {
1462 mutex_lock(&dev->ethtool->rss_lock);
1463 locked = true;
1464 }
1465 if (create) {
1466 if (rxfh_dev.rss_delete) {
1467 ret = -EINVAL;
1468 goto out;
1469 }
1470 ctx = ethtool_rxfh_ctx_alloc(ops, dev_indir_size, dev_key_size);
1471 if (!ctx) {
1472 ret = -ENOMEM;
1473 goto out;
1474 }
1475
1476 if (ops->create_rxfh_context) {
1477 u32 limit = ops->rxfh_max_num_contexts ?: U32_MAX;
1478 u32 ctx_id;
1479
1480 /* driver uses new API, core allocates ID */
1481 ret = xa_alloc(&dev->ethtool->rss_ctx, &ctx_id, ctx,
1482 XA_LIMIT(1, limit - 1),
1483 GFP_KERNEL_ACCOUNT);
1484 if (ret < 0) {
1485 kfree(ctx);
1486 goto out;
1487 }
1488 WARN_ON(!ctx_id); /* can't happen */
1489 rxfh.rss_context = ctx_id;
1490 }
1491 } else if (rxfh.rss_context) {
1492 ctx = xa_load(&dev->ethtool->rss_ctx, rxfh.rss_context);
1493 if (!ctx) {
1494 ret = -ENOENT;
1495 goto out;
1496 }
1497 }
1498 rxfh_dev.hfunc = rxfh.hfunc;
1499 rxfh_dev.rss_context = rxfh.rss_context;
1500 rxfh_dev.input_xfrm = rxfh.input_xfrm;
1501
1502 if (rxfh.rss_context && ops->create_rxfh_context) {
1503 if (create) {
1504 ret = ops->create_rxfh_context(dev, ctx, &rxfh_dev,
1505 extack);
1506 /* Make sure driver populates defaults */
1507 WARN_ON_ONCE(!ret && !rxfh_dev.key &&
1508 !memchr_inv(ethtool_rxfh_context_key(ctx),
1509 0, ctx->key_size));
1510 } else if (rxfh_dev.rss_delete) {
1511 ret = ops->remove_rxfh_context(dev, ctx,
1512 rxfh.rss_context,
1513 extack);
1514 } else {
1515 ret = ops->modify_rxfh_context(dev, ctx, &rxfh_dev,
1516 extack);
1517 }
1518 } else {
1519 ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1520 }
1521 if (ret) {
1522 if (create) {
1523 /* failed to create, free our new tracking entry */
1524 if (ops->create_rxfh_context)
1525 xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context);
1526 kfree(ctx);
1527 }
1528 goto out;
1529 }
1530
1531 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1532 &rxfh_dev.rss_context, sizeof(rxfh_dev.rss_context)))
1533 ret = -EFAULT;
1534
1535 if (!rxfh_dev.rss_context) {
1536 /* indicate whether rxfh was set to default */
1537 if (rxfh.indir_size == 0)
1538 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1539 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1540 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1541 }
1542 /* Update rss_ctx tracking */
1543 if (create && !ops->create_rxfh_context) {
1544 /* driver uses old API, it chose context ID */
1545 if (WARN_ON(xa_load(&dev->ethtool->rss_ctx, rxfh_dev.rss_context))) {
1546 /* context ID reused, our tracking is screwed */
1547 kfree(ctx);
1548 goto out;
1549 }
1550 /* Allocate the exact ID the driver gave us */
1551 if (xa_is_err(xa_store(&dev->ethtool->rss_ctx, rxfh_dev.rss_context,
1552 ctx, GFP_KERNEL))) {
1553 kfree(ctx);
1554 goto out;
1555 }
1556
1557 /* Fetch the defaults for the old API, in the new API drivers
1558 * should write defaults into ctx themselves.
1559 */
1560 rxfh_dev.indir = (u32 *)rss_config;
1561 rxfh_dev.indir_size = dev_indir_size;
1562
1563 rxfh_dev.key = rss_config + indir_bytes;
1564 rxfh_dev.key_size = dev_key_size;
1565
1566 ret = ops->get_rxfh(dev, &rxfh_dev);
1567 if (WARN_ON(ret)) {
1568 xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context);
1569 kfree(ctx);
1570 goto out;
1571 }
1572 }
1573 if (rxfh_dev.rss_delete) {
1574 WARN_ON(xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context) != ctx);
1575 kfree(ctx);
1576 } else if (ctx) {
1577 if (rxfh_dev.indir) {
1578 for (i = 0; i < dev_indir_size; i++)
1579 ethtool_rxfh_context_indir(ctx)[i] = rxfh_dev.indir[i];
1580 ctx->indir_configured =
1581 rxfh.indir_size &&
1582 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE;
1583 }
1584 if (rxfh_dev.key) {
1585 memcpy(ethtool_rxfh_context_key(ctx), rxfh_dev.key,
1586 dev_key_size);
1587 ctx->key_configured = !!rxfh.key_size;
1588 }
1589 if (rxfh_dev.hfunc != ETH_RSS_HASH_NO_CHANGE)
1590 ctx->hfunc = rxfh_dev.hfunc;
1591 if (rxfh_dev.input_xfrm != RXH_XFRM_NO_CHANGE)
1592 ctx->input_xfrm = rxfh_dev.input_xfrm;
1593 }
1594
1595 out:
1596 if (locked)
1597 mutex_unlock(&dev->ethtool->rss_lock);
1598 kfree(rss_config);
1599 return ret;
1600 }
1601
1602 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1603 {
1604 struct ethtool_regs regs;
1605 const struct ethtool_ops *ops = dev->ethtool_ops;
1606 void *regbuf;
1607 int reglen, ret;
1608
1609 if (!ops->get_regs || !ops->get_regs_len)
1610 return -EOPNOTSUPP;
1611
1612 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1613 return -EFAULT;
1614
1615 reglen = ops->get_regs_len(dev);
1616 if (reglen <= 0)
1617 return reglen;
1618
1619 if (regs.len > reglen)
1620 regs.len = reglen;
1621
1622 regbuf = vzalloc(reglen);
1623 if (!regbuf)
1624 return -ENOMEM;
1625
1626 if (regs.len < reglen)
1627 reglen = regs.len;
1628
1629 ops->get_regs(dev, &regs, regbuf);
1630
1631 ret = -EFAULT;
1632 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1633 goto out;
1634 useraddr += offsetof(struct ethtool_regs, data);
1635 if (copy_to_user(useraddr, regbuf, reglen))
1636 goto out;
1637 ret = 0;
1638
1639 out:
1640 vfree(regbuf);
1641 return ret;
1642 }
1643
1644 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1645 {
1646 struct ethtool_value reset;
1647 int ret;
1648
1649 if (!dev->ethtool_ops->reset)
1650 return -EOPNOTSUPP;
1651
1652 if (dev->ethtool->module_fw_flash_in_progress)
1653 return -EBUSY;
1654
1655 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1656 return -EFAULT;
1657
1658 ret = dev->ethtool_ops->reset(dev, &reset.data);
1659 if (ret)
1660 return ret;
1661
1662 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1663 return -EFAULT;
1664 return 0;
1665 }
1666
1667 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1668 {
1669 struct ethtool_wolinfo wol;
1670
1671 if (!dev->ethtool_ops->get_wol)
1672 return -EOPNOTSUPP;
1673
1674 memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1675 wol.cmd = ETHTOOL_GWOL;
1676 dev->ethtool_ops->get_wol(dev, &wol);
1677
1678 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1679 return -EFAULT;
1680 return 0;
1681 }
1682
1683 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1684 {
1685 struct ethtool_wolinfo wol, cur_wol;
1686 int ret;
1687
1688 if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol)
1689 return -EOPNOTSUPP;
1690
1691 memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo));
1692 cur_wol.cmd = ETHTOOL_GWOL;
1693 dev->ethtool_ops->get_wol(dev, &cur_wol);
1694
1695 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1696 return -EFAULT;
1697
1698 if (wol.wolopts & ~cur_wol.supported)
1699 return -EINVAL;
1700
1701 if (wol.wolopts == cur_wol.wolopts &&
1702 !memcmp(wol.sopass, cur_wol.sopass, sizeof(wol.sopass)))
1703 return 0;
1704
1705 ret = dev->ethtool_ops->set_wol(dev, &wol);
1706 if (ret)
1707 return ret;
1708
1709 dev->ethtool->wol_enabled = !!wol.wolopts;
1710 ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1711
1712 return 0;
1713 }
1714
1715 static void eee_to_keee(struct ethtool_keee *keee,
1716 const struct ethtool_eee *eee)
1717 {
1718 memset(keee, 0, sizeof(*keee));
1719
1720 keee->eee_enabled = eee->eee_enabled;
1721 keee->tx_lpi_enabled = eee->tx_lpi_enabled;
1722 keee->tx_lpi_timer = eee->tx_lpi_timer;
1723
1724 ethtool_convert_legacy_u32_to_link_mode(keee->advertised,
1725 eee->advertised);
1726 }
1727
1728 static void keee_to_eee(struct ethtool_eee *eee,
1729 const struct ethtool_keee *keee)
1730 {
1731 bool overflow;
1732
1733 memset(eee, 0, sizeof(*eee));
1734
1735 eee->eee_active = keee->eee_active;
1736 eee->eee_enabled = keee->eee_enabled;
1737 eee->tx_lpi_enabled = keee->tx_lpi_enabled;
1738 eee->tx_lpi_timer = keee->tx_lpi_timer;
1739
1740 overflow = !ethtool_convert_link_mode_to_legacy_u32(&eee->supported,
1741 keee->supported);
1742 ethtool_convert_link_mode_to_legacy_u32(&eee->advertised,
1743 keee->advertised);
1744 ethtool_convert_link_mode_to_legacy_u32(&eee->lp_advertised,
1745 keee->lp_advertised);
1746 if (overflow)
1747 pr_warn("Ethtool ioctl interface doesn't support passing EEE linkmodes beyond bit 32\n");
1748 }
1749
1750 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1751 {
1752 struct ethtool_keee keee;
1753 struct ethtool_eee eee;
1754 int rc;
1755
1756 if (!dev->ethtool_ops->get_eee)
1757 return -EOPNOTSUPP;
1758
1759 memset(&keee, 0, sizeof(keee));
1760 rc = dev->ethtool_ops->get_eee(dev, &keee);
1761 if (rc)
1762 return rc;
1763
1764 keee_to_eee(&eee, &keee);
1765 if (copy_to_user(useraddr, &eee, sizeof(eee)))
1766 return -EFAULT;
1767
1768 return 0;
1769 }
1770
1771 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1772 {
1773 struct ethtool_keee keee;
1774 struct ethtool_eee eee;
1775 int ret;
1776
1777 if (!dev->ethtool_ops->set_eee)
1778 return -EOPNOTSUPP;
1779
1780 if (copy_from_user(&eee, useraddr, sizeof(eee)))
1781 return -EFAULT;
1782
1783 eee_to_keee(&keee, &eee);
1784 ret = dev->ethtool_ops->set_eee(dev, &keee);
1785 if (!ret)
1786 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1787 return ret;
1788 }
1789
1790 static int ethtool_nway_reset(struct net_device *dev)
1791 {
1792 if (!dev->ethtool_ops->nway_reset)
1793 return -EOPNOTSUPP;
1794
1795 return dev->ethtool_ops->nway_reset(dev);
1796 }
1797
1798 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1799 {
1800 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1801 int link = __ethtool_get_link(dev);
1802
1803 if (link < 0)
1804 return link;
1805
1806 edata.data = link;
1807 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1808 return -EFAULT;
1809 return 0;
1810 }
1811
1812 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1813 int (*getter)(struct net_device *,
1814 struct ethtool_eeprom *, u8 *),
1815 u32 total_len)
1816 {
1817 struct ethtool_eeprom eeprom;
1818 void __user *userbuf = useraddr + sizeof(eeprom);
1819 u32 bytes_remaining;
1820 u8 *data;
1821 int ret = 0;
1822
1823 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1824 return -EFAULT;
1825
1826 /* Check for wrap and zero */
1827 if (eeprom.offset + eeprom.len <= eeprom.offset)
1828 return -EINVAL;
1829
1830 /* Check for exceeding total eeprom len */
1831 if (eeprom.offset + eeprom.len > total_len)
1832 return -EINVAL;
1833
1834 data = kzalloc(PAGE_SIZE, GFP_USER);
1835 if (!data)
1836 return -ENOMEM;
1837
1838 bytes_remaining = eeprom.len;
1839 while (bytes_remaining > 0) {
1840 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1841
1842 ret = getter(dev, &eeprom, data);
1843 if (ret)
1844 break;
1845 if (!eeprom.len) {
1846 ret = -EIO;
1847 break;
1848 }
1849 if (copy_to_user(userbuf, data, eeprom.len)) {
1850 ret = -EFAULT;
1851 break;
1852 }
1853 userbuf += eeprom.len;
1854 eeprom.offset += eeprom.len;
1855 bytes_remaining -= eeprom.len;
1856 }
1857
1858 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1859 eeprom.offset -= eeprom.len;
1860 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1861 ret = -EFAULT;
1862
1863 kfree(data);
1864 return ret;
1865 }
1866
1867 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1868 {
1869 const struct ethtool_ops *ops = dev->ethtool_ops;
1870
1871 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1872 !ops->get_eeprom_len(dev))
1873 return -EOPNOTSUPP;
1874
1875 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1876 ops->get_eeprom_len(dev));
1877 }
1878
1879 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1880 {
1881 struct ethtool_eeprom eeprom;
1882 const struct ethtool_ops *ops = dev->ethtool_ops;
1883 void __user *userbuf = useraddr + sizeof(eeprom);
1884 u32 bytes_remaining;
1885 u8 *data;
1886 int ret = 0;
1887
1888 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1889 !ops->get_eeprom_len(dev))
1890 return -EOPNOTSUPP;
1891
1892 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1893 return -EFAULT;
1894
1895 /* Check for wrap and zero */
1896 if (eeprom.offset + eeprom.len <= eeprom.offset)
1897 return -EINVAL;
1898
1899 /* Check for exceeding total eeprom len */
1900 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1901 return -EINVAL;
1902
1903 data = kzalloc(PAGE_SIZE, GFP_USER);
1904 if (!data)
1905 return -ENOMEM;
1906
1907 bytes_remaining = eeprom.len;
1908 while (bytes_remaining > 0) {
1909 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1910
1911 if (copy_from_user(data, userbuf, eeprom.len)) {
1912 ret = -EFAULT;
1913 break;
1914 }
1915 ret = ops->set_eeprom(dev, &eeprom, data);
1916 if (ret)
1917 break;
1918 userbuf += eeprom.len;
1919 eeprom.offset += eeprom.len;
1920 bytes_remaining -= eeprom.len;
1921 }
1922
1923 kfree(data);
1924 return ret;
1925 }
1926
1927 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1928 void __user *useraddr)
1929 {
1930 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1931 struct kernel_ethtool_coalesce kernel_coalesce = {};
1932 int ret;
1933
1934 if (!dev->ethtool_ops->get_coalesce)
1935 return -EOPNOTSUPP;
1936
1937 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1938 NULL);
1939 if (ret)
1940 return ret;
1941
1942 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1943 return -EFAULT;
1944 return 0;
1945 }
1946
1947 static bool
1948 ethtool_set_coalesce_supported(struct net_device *dev,
1949 struct ethtool_coalesce *coalesce)
1950 {
1951 u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1952 u32 nonzero_params = 0;
1953
1954 if (coalesce->rx_coalesce_usecs)
1955 nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1956 if (coalesce->rx_max_coalesced_frames)
1957 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1958 if (coalesce->rx_coalesce_usecs_irq)
1959 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1960 if (coalesce->rx_max_coalesced_frames_irq)
1961 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1962 if (coalesce->tx_coalesce_usecs)
1963 nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1964 if (coalesce->tx_max_coalesced_frames)
1965 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1966 if (coalesce->tx_coalesce_usecs_irq)
1967 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1968 if (coalesce->tx_max_coalesced_frames_irq)
1969 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1970 if (coalesce->stats_block_coalesce_usecs)
1971 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1972 if (coalesce->use_adaptive_rx_coalesce)
1973 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1974 if (coalesce->use_adaptive_tx_coalesce)
1975 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1976 if (coalesce->pkt_rate_low)
1977 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1978 if (coalesce->rx_coalesce_usecs_low)
1979 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1980 if (coalesce->rx_max_coalesced_frames_low)
1981 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1982 if (coalesce->tx_coalesce_usecs_low)
1983 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1984 if (coalesce->tx_max_coalesced_frames_low)
1985 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1986 if (coalesce->pkt_rate_high)
1987 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1988 if (coalesce->rx_coalesce_usecs_high)
1989 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1990 if (coalesce->rx_max_coalesced_frames_high)
1991 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1992 if (coalesce->tx_coalesce_usecs_high)
1993 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1994 if (coalesce->tx_max_coalesced_frames_high)
1995 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1996 if (coalesce->rate_sample_interval)
1997 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1998
1999 return (supported_params & nonzero_params) == nonzero_params;
2000 }
2001
2002 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
2003 void __user *useraddr)
2004 {
2005 struct kernel_ethtool_coalesce kernel_coalesce = {};
2006 struct ethtool_coalesce coalesce;
2007 int ret;
2008
2009 if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce)
2010 return -EOPNOTSUPP;
2011
2012 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
2013 NULL);
2014 if (ret)
2015 return ret;
2016
2017 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
2018 return -EFAULT;
2019
2020 if (!ethtool_set_coalesce_supported(dev, &coalesce))
2021 return -EOPNOTSUPP;
2022
2023 ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
2024 NULL);
2025 if (!ret)
2026 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
2027 return ret;
2028 }
2029
2030 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
2031 {
2032 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
2033 struct kernel_ethtool_ringparam kernel_ringparam = {};
2034
2035 if (!dev->ethtool_ops->get_ringparam)
2036 return -EOPNOTSUPP;
2037
2038 dev->ethtool_ops->get_ringparam(dev, &ringparam,
2039 &kernel_ringparam, NULL);
2040
2041 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
2042 return -EFAULT;
2043 return 0;
2044 }
2045
2046 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
2047 {
2048 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
2049 struct kernel_ethtool_ringparam kernel_ringparam;
2050 int ret;
2051
2052 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
2053 return -EOPNOTSUPP;
2054
2055 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
2056 return -EFAULT;
2057
2058 dev->ethtool_ops->get_ringparam(dev, &max, &kernel_ringparam, NULL);
2059
2060 /* ensure new ring parameters are within the maximums */
2061 if (ringparam.rx_pending > max.rx_max_pending ||
2062 ringparam.rx_mini_pending > max.rx_mini_max_pending ||
2063 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
2064 ringparam.tx_pending > max.tx_max_pending)
2065 return -EINVAL;
2066
2067 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
2068 &kernel_ringparam, NULL);
2069 if (!ret)
2070 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
2071 return ret;
2072 }
2073
2074 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
2075 void __user *useraddr)
2076 {
2077 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
2078
2079 if (!dev->ethtool_ops->get_channels)
2080 return -EOPNOTSUPP;
2081
2082 dev->ethtool_ops->get_channels(dev, &channels);
2083
2084 if (copy_to_user(useraddr, &channels, sizeof(channels)))
2085 return -EFAULT;
2086 return 0;
2087 }
2088
2089 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
2090 void __user *useraddr)
2091 {
2092 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
2093 u16 from_channel, to_channel;
2094 unsigned int i;
2095 int ret;
2096
2097 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
2098 return -EOPNOTSUPP;
2099
2100 if (copy_from_user(&channels, useraddr, sizeof(channels)))
2101 return -EFAULT;
2102
2103 dev->ethtool_ops->get_channels(dev, &curr);
2104
2105 if (channels.rx_count == curr.rx_count &&
2106 channels.tx_count == curr.tx_count &&
2107 channels.combined_count == curr.combined_count &&
2108 channels.other_count == curr.other_count)
2109 return 0;
2110
2111 /* ensure new counts are within the maximums */
2112 if (channels.rx_count > curr.max_rx ||
2113 channels.tx_count > curr.max_tx ||
2114 channels.combined_count > curr.max_combined ||
2115 channels.other_count > curr.max_other)
2116 return -EINVAL;
2117
2118 /* ensure there is at least one RX and one TX channel */
2119 if (!channels.combined_count &&
2120 (!channels.rx_count || !channels.tx_count))
2121 return -EINVAL;
2122
2123 ret = ethtool_check_max_channel(dev, channels, NULL);
2124 if (ret)
2125 return ret;
2126
2127 /* Disabling channels, query zero-copy AF_XDP sockets */
2128 from_channel = channels.combined_count +
2129 min(channels.rx_count, channels.tx_count);
2130 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
2131 for (i = from_channel; i < to_channel; i++)
2132 if (xsk_get_pool_from_qid(dev, i))
2133 return -EINVAL;
2134
2135 ret = dev->ethtool_ops->set_channels(dev, &channels);
2136 if (!ret)
2137 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
2138 return ret;
2139 }
2140
2141 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
2142 {
2143 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
2144
2145 if (!dev->ethtool_ops->get_pauseparam)
2146 return -EOPNOTSUPP;
2147
2148 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
2149
2150 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
2151 return -EFAULT;
2152 return 0;
2153 }
2154
2155 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
2156 {
2157 struct ethtool_pauseparam pauseparam;
2158 int ret;
2159
2160 if (!dev->ethtool_ops->set_pauseparam)
2161 return -EOPNOTSUPP;
2162
2163 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
2164 return -EFAULT;
2165
2166 ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
2167 if (!ret)
2168 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
2169 return ret;
2170 }
2171
2172 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
2173 {
2174 struct ethtool_test test;
2175 const struct ethtool_ops *ops = dev->ethtool_ops;
2176 u64 *data;
2177 int ret, test_len;
2178
2179 if (!ops->self_test || !ops->get_sset_count)
2180 return -EOPNOTSUPP;
2181
2182 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
2183 if (test_len < 0)
2184 return test_len;
2185 WARN_ON(test_len == 0);
2186
2187 if (copy_from_user(&test, useraddr, sizeof(test)))
2188 return -EFAULT;
2189
2190 test.len = test_len;
2191 data = kcalloc(test_len, sizeof(u64), GFP_USER);
2192 if (!data)
2193 return -ENOMEM;
2194
2195 netif_testing_on(dev);
2196 ops->self_test(dev, &test, data);
2197 netif_testing_off(dev);
2198
2199 ret = -EFAULT;
2200 if (copy_to_user(useraddr, &test, sizeof(test)))
2201 goto out;
2202 useraddr += sizeof(test);
2203 if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64))))
2204 goto out;
2205 ret = 0;
2206
2207 out:
2208 kfree(data);
2209 return ret;
2210 }
2211
2212 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
2213 {
2214 struct ethtool_gstrings gstrings;
2215 u8 *data;
2216 int ret;
2217
2218 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
2219 return -EFAULT;
2220
2221 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
2222 if (ret < 0)
2223 return ret;
2224 if (ret > S32_MAX / ETH_GSTRING_LEN)
2225 return -ENOMEM;
2226 WARN_ON_ONCE(!ret);
2227
2228 gstrings.len = ret;
2229
2230 if (gstrings.len) {
2231 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
2232 if (!data)
2233 return -ENOMEM;
2234
2235 __ethtool_get_strings(dev, gstrings.string_set, data);
2236 } else {
2237 data = NULL;
2238 }
2239
2240 ret = -EFAULT;
2241 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
2242 goto out;
2243 useraddr += sizeof(gstrings);
2244 if (gstrings.len &&
2245 copy_to_user(useraddr, data,
2246 array_size(gstrings.len, ETH_GSTRING_LEN)))
2247 goto out;
2248 ret = 0;
2249
2250 out:
2251 vfree(data);
2252 return ret;
2253 }
2254
2255 __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
2256 {
2257 va_list args;
2258
2259 va_start(args, fmt);
2260 vsnprintf(*data, ETH_GSTRING_LEN, fmt, args);
2261 va_end(args);
2262
2263 *data += ETH_GSTRING_LEN;
2264 }
2265 EXPORT_SYMBOL(ethtool_sprintf);
2266
2267 void ethtool_puts(u8 **data, const char *str)
2268 {
2269 strscpy(*data, str, ETH_GSTRING_LEN);
2270 *data += ETH_GSTRING_LEN;
2271 }
2272 EXPORT_SYMBOL(ethtool_puts);
2273
2274 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
2275 {
2276 struct ethtool_value id;
2277 static bool busy;
2278 const struct ethtool_ops *ops = dev->ethtool_ops;
2279 netdevice_tracker dev_tracker;
2280 int rc;
2281
2282 if (!ops->set_phys_id)
2283 return -EOPNOTSUPP;
2284
2285 if (busy)
2286 return -EBUSY;
2287
2288 if (copy_from_user(&id, useraddr, sizeof(id)))
2289 return -EFAULT;
2290
2291 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
2292 if (rc < 0)
2293 return rc;
2294
2295 /* Drop the RTNL lock while waiting, but prevent reentry or
2296 * removal of the device.
2297 */
2298 busy = true;
2299 netdev_hold(dev, &dev_tracker, GFP_KERNEL);
2300 rtnl_unlock();
2301
2302 if (rc == 0) {
2303 /* Driver will handle this itself */
2304 schedule_timeout_interruptible(
2305 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
2306 } else {
2307 /* Driver expects to be called at twice the frequency in rc */
2308 int n = rc * 2, interval = HZ / n;
2309 u64 count = mul_u32_u32(n, id.data);
2310 u64 i = 0;
2311
2312 do {
2313 rtnl_lock();
2314 rc = ops->set_phys_id(dev,
2315 (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
2316 rtnl_unlock();
2317 if (rc)
2318 break;
2319 schedule_timeout_interruptible(interval);
2320 } while (!signal_pending(current) && (!id.data || i < count));
2321 }
2322
2323 rtnl_lock();
2324 netdev_put(dev, &dev_tracker);
2325 busy = false;
2326
2327 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
2328 return rc;
2329 }
2330
2331 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
2332 {
2333 struct ethtool_stats stats;
2334 const struct ethtool_ops *ops = dev->ethtool_ops;
2335 u64 *data;
2336 int ret, n_stats;
2337
2338 if (!ops->get_ethtool_stats || !ops->get_sset_count)
2339 return -EOPNOTSUPP;
2340
2341 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
2342 if (n_stats < 0)
2343 return n_stats;
2344 if (n_stats > S32_MAX / sizeof(u64))
2345 return -ENOMEM;
2346 WARN_ON_ONCE(!n_stats);
2347 if (copy_from_user(&stats, useraddr, sizeof(stats)))
2348 return -EFAULT;
2349
2350 stats.n_stats = n_stats;
2351
2352 if (n_stats) {
2353 data = vzalloc(array_size(n_stats, sizeof(u64)));
2354 if (!data)
2355 return -ENOMEM;
2356 ops->get_ethtool_stats(dev, &stats, data);
2357 } else {
2358 data = NULL;
2359 }
2360
2361 ret = -EFAULT;
2362 if (copy_to_user(useraddr, &stats, sizeof(stats)))
2363 goto out;
2364 useraddr += sizeof(stats);
2365 if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2366 goto out;
2367 ret = 0;
2368
2369 out:
2370 vfree(data);
2371 return ret;
2372 }
2373
2374 static int ethtool_vzalloc_stats_array(int n_stats, u64 **data)
2375 {
2376 if (n_stats < 0)
2377 return n_stats;
2378 if (n_stats > S32_MAX / sizeof(u64))
2379 return -ENOMEM;
2380 if (WARN_ON_ONCE(!n_stats))
2381 return -EOPNOTSUPP;
2382
2383 *data = vzalloc(array_size(n_stats, sizeof(u64)));
2384 if (!*data)
2385 return -ENOMEM;
2386
2387 return 0;
2388 }
2389
2390 static int ethtool_get_phy_stats_phydev(struct phy_device *phydev,
2391 struct ethtool_stats *stats,
2392 u64 **data)
2393 {
2394 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
2395 int n_stats, ret;
2396
2397 if (!phy_ops || !phy_ops->get_sset_count || !phy_ops->get_stats)
2398 return -EOPNOTSUPP;
2399
2400 n_stats = phy_ops->get_sset_count(phydev);
2401
2402 ret = ethtool_vzalloc_stats_array(n_stats, data);
2403 if (ret)
2404 return ret;
2405
2406 stats->n_stats = n_stats;
2407 return phy_ops->get_stats(phydev, stats, *data);
2408 }
2409
2410 static int ethtool_get_phy_stats_ethtool(struct net_device *dev,
2411 struct ethtool_stats *stats,
2412 u64 **data)
2413 {
2414 const struct ethtool_ops *ops = dev->ethtool_ops;
2415 int n_stats, ret;
2416
2417 if (!ops || !ops->get_sset_count || !ops->get_ethtool_phy_stats)
2418 return -EOPNOTSUPP;
2419
2420 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
2421
2422 ret = ethtool_vzalloc_stats_array(n_stats, data);
2423 if (ret)
2424 return ret;
2425
2426 stats->n_stats = n_stats;
2427 ops->get_ethtool_phy_stats(dev, stats, *data);
2428
2429 return 0;
2430 }
2431
2432 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2433 {
2434 struct phy_device *phydev = dev->phydev;
2435 struct ethtool_stats stats;
2436 u64 *data = NULL;
2437 int ret = -EOPNOTSUPP;
2438
2439 if (copy_from_user(&stats, useraddr, sizeof(stats)))
2440 return -EFAULT;
2441
2442 if (phydev)
2443 ret = ethtool_get_phy_stats_phydev(phydev, &stats, &data);
2444
2445 if (ret == -EOPNOTSUPP)
2446 ret = ethtool_get_phy_stats_ethtool(dev, &stats, &data);
2447
2448 if (ret)
2449 goto out;
2450
2451 if (copy_to_user(useraddr, &stats, sizeof(stats))) {
2452 ret = -EFAULT;
2453 goto out;
2454 }
2455
2456 useraddr += sizeof(stats);
2457 if (copy_to_user(useraddr, data, array_size(stats.n_stats, sizeof(u64))))
2458 ret = -EFAULT;
2459
2460 out:
2461 vfree(data);
2462 return ret;
2463 }
2464
2465 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2466 {
2467 struct ethtool_perm_addr epaddr;
2468
2469 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2470 return -EFAULT;
2471
2472 if (epaddr.size < dev->addr_len)
2473 return -ETOOSMALL;
2474 epaddr.size = dev->addr_len;
2475
2476 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2477 return -EFAULT;
2478 useraddr += sizeof(epaddr);
2479 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2480 return -EFAULT;
2481 return 0;
2482 }
2483
2484 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2485 u32 cmd, u32 (*actor)(struct net_device *))
2486 {
2487 struct ethtool_value edata = { .cmd = cmd };
2488
2489 if (!actor)
2490 return -EOPNOTSUPP;
2491
2492 edata.data = actor(dev);
2493
2494 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2495 return -EFAULT;
2496 return 0;
2497 }
2498
2499 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2500 void (*actor)(struct net_device *, u32))
2501 {
2502 struct ethtool_value edata;
2503
2504 if (!actor)
2505 return -EOPNOTSUPP;
2506
2507 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2508 return -EFAULT;
2509
2510 actor(dev, edata.data);
2511 return 0;
2512 }
2513
2514 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2515 int (*actor)(struct net_device *, u32))
2516 {
2517 struct ethtool_value edata;
2518
2519 if (!actor)
2520 return -EOPNOTSUPP;
2521
2522 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2523 return -EFAULT;
2524
2525 return actor(dev, edata.data);
2526 }
2527
2528 static int
2529 ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req)
2530 {
2531 if (!dev->ethtool_ops->flash_device) {
2532 req->devlink = netdev_to_devlink_get(dev);
2533 return 0;
2534 }
2535
2536 return dev->ethtool_ops->flash_device(dev, &req->efl);
2537 }
2538
2539 static int ethtool_set_dump(struct net_device *dev,
2540 void __user *useraddr)
2541 {
2542 struct ethtool_dump dump;
2543
2544 if (!dev->ethtool_ops->set_dump)
2545 return -EOPNOTSUPP;
2546
2547 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2548 return -EFAULT;
2549
2550 return dev->ethtool_ops->set_dump(dev, &dump);
2551 }
2552
2553 static int ethtool_get_dump_flag(struct net_device *dev,
2554 void __user *useraddr)
2555 {
2556 int ret;
2557 struct ethtool_dump dump;
2558 const struct ethtool_ops *ops = dev->ethtool_ops;
2559
2560 if (!ops->get_dump_flag)
2561 return -EOPNOTSUPP;
2562
2563 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2564 return -EFAULT;
2565
2566 ret = ops->get_dump_flag(dev, &dump);
2567 if (ret)
2568 return ret;
2569
2570 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2571 return -EFAULT;
2572 return 0;
2573 }
2574
2575 static int ethtool_get_dump_data(struct net_device *dev,
2576 void __user *useraddr)
2577 {
2578 int ret;
2579 __u32 len;
2580 struct ethtool_dump dump, tmp;
2581 const struct ethtool_ops *ops = dev->ethtool_ops;
2582 void *data = NULL;
2583
2584 if (!ops->get_dump_data || !ops->get_dump_flag)
2585 return -EOPNOTSUPP;
2586
2587 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2588 return -EFAULT;
2589
2590 memset(&tmp, 0, sizeof(tmp));
2591 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2592 ret = ops->get_dump_flag(dev, &tmp);
2593 if (ret)
2594 return ret;
2595
2596 len = min(tmp.len, dump.len);
2597 if (!len)
2598 return -EFAULT;
2599
2600 /* Don't ever let the driver think there's more space available
2601 * than it requested with .get_dump_flag().
2602 */
2603 dump.len = len;
2604
2605 /* Always allocate enough space to hold the whole thing so that the
2606 * driver does not need to check the length and bother with partial
2607 * dumping.
2608 */
2609 data = vzalloc(tmp.len);
2610 if (!data)
2611 return -ENOMEM;
2612 ret = ops->get_dump_data(dev, &dump, data);
2613 if (ret)
2614 goto out;
2615
2616 /* There are two sane possibilities:
2617 * 1. The driver's .get_dump_data() does not touch dump.len.
2618 * 2. Or it may set dump.len to how much it really writes, which
2619 * should be tmp.len (or len if it can do a partial dump).
2620 * In any case respond to userspace with the actual length of data
2621 * it's receiving.
2622 */
2623 WARN_ON(dump.len != len && dump.len != tmp.len);
2624 dump.len = len;
2625
2626 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2627 ret = -EFAULT;
2628 goto out;
2629 }
2630 useraddr += offsetof(struct ethtool_dump, data);
2631 if (copy_to_user(useraddr, data, len))
2632 ret = -EFAULT;
2633 out:
2634 vfree(data);
2635 return ret;
2636 }
2637
2638 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2639 {
2640 struct kernel_ethtool_ts_info kernel_info;
2641 struct ethtool_ts_info info = {};
2642 int err;
2643
2644 err = __ethtool_get_ts_info(dev, &kernel_info);
2645 if (err)
2646 return err;
2647
2648 info.cmd = kernel_info.cmd;
2649 info.so_timestamping = kernel_info.so_timestamping;
2650 info.phc_index = kernel_info.phc_index;
2651 info.tx_types = kernel_info.tx_types;
2652 info.rx_filters = kernel_info.rx_filters;
2653
2654 if (copy_to_user(useraddr, &info, sizeof(info)))
2655 return -EFAULT;
2656
2657 return 0;
2658 }
2659
2660 int ethtool_get_module_info_call(struct net_device *dev,
2661 struct ethtool_modinfo *modinfo)
2662 {
2663 const struct ethtool_ops *ops = dev->ethtool_ops;
2664 struct phy_device *phydev = dev->phydev;
2665
2666 if (dev->ethtool->module_fw_flash_in_progress)
2667 return -EBUSY;
2668
2669 if (dev->sfp_bus)
2670 return sfp_get_module_info(dev->sfp_bus, modinfo);
2671
2672 if (phydev && phydev->drv && phydev->drv->module_info)
2673 return phydev->drv->module_info(phydev, modinfo);
2674
2675 if (ops->get_module_info)
2676 return ops->get_module_info(dev, modinfo);
2677
2678 return -EOPNOTSUPP;
2679 }
2680
2681 static int ethtool_get_module_info(struct net_device *dev,
2682 void __user *useraddr)
2683 {
2684 int ret;
2685 struct ethtool_modinfo modinfo;
2686
2687 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2688 return -EFAULT;
2689
2690 ret = ethtool_get_module_info_call(dev, &modinfo);
2691 if (ret)
2692 return ret;
2693
2694 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2695 return -EFAULT;
2696
2697 return 0;
2698 }
2699
2700 int ethtool_get_module_eeprom_call(struct net_device *dev,
2701 struct ethtool_eeprom *ee, u8 *data)
2702 {
2703 const struct ethtool_ops *ops = dev->ethtool_ops;
2704 struct phy_device *phydev = dev->phydev;
2705
2706 if (dev->ethtool->module_fw_flash_in_progress)
2707 return -EBUSY;
2708
2709 if (dev->sfp_bus)
2710 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2711
2712 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2713 return phydev->drv->module_eeprom(phydev, ee, data);
2714
2715 if (ops->get_module_eeprom)
2716 return ops->get_module_eeprom(dev, ee, data);
2717
2718 return -EOPNOTSUPP;
2719 }
2720
2721 static int ethtool_get_module_eeprom(struct net_device *dev,
2722 void __user *useraddr)
2723 {
2724 int ret;
2725 struct ethtool_modinfo modinfo;
2726
2727 ret = ethtool_get_module_info_call(dev, &modinfo);
2728 if (ret)
2729 return ret;
2730
2731 return ethtool_get_any_eeprom(dev, useraddr,
2732 ethtool_get_module_eeprom_call,
2733 modinfo.eeprom_len);
2734 }
2735
2736 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2737 {
2738 switch (tuna->id) {
2739 case ETHTOOL_RX_COPYBREAK:
2740 case ETHTOOL_TX_COPYBREAK:
2741 case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
2742 if (tuna->len != sizeof(u32) ||
2743 tuna->type_id != ETHTOOL_TUNABLE_U32)
2744 return -EINVAL;
2745 break;
2746 case ETHTOOL_PFC_PREVENTION_TOUT:
2747 if (tuna->len != sizeof(u16) ||
2748 tuna->type_id != ETHTOOL_TUNABLE_U16)
2749 return -EINVAL;
2750 break;
2751 default:
2752 return -EINVAL;
2753 }
2754
2755 return 0;
2756 }
2757
2758 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2759 {
2760 int ret;
2761 struct ethtool_tunable tuna;
2762 const struct ethtool_ops *ops = dev->ethtool_ops;
2763 void *data;
2764
2765 if (!ops->get_tunable)
2766 return -EOPNOTSUPP;
2767 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2768 return -EFAULT;
2769 ret = ethtool_tunable_valid(&tuna);
2770 if (ret)
2771 return ret;
2772 data = kzalloc(tuna.len, GFP_USER);
2773 if (!data)
2774 return -ENOMEM;
2775 ret = ops->get_tunable(dev, &tuna, data);
2776 if (ret)
2777 goto out;
2778 useraddr += sizeof(tuna);
2779 ret = -EFAULT;
2780 if (copy_to_user(useraddr, data, tuna.len))
2781 goto out;
2782 ret = 0;
2783
2784 out:
2785 kfree(data);
2786 return ret;
2787 }
2788
2789 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2790 {
2791 int ret;
2792 struct ethtool_tunable tuna;
2793 const struct ethtool_ops *ops = dev->ethtool_ops;
2794 void *data;
2795
2796 if (!ops->set_tunable)
2797 return -EOPNOTSUPP;
2798 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2799 return -EFAULT;
2800 ret = ethtool_tunable_valid(&tuna);
2801 if (ret)
2802 return ret;
2803 useraddr += sizeof(tuna);
2804 data = memdup_user(useraddr, tuna.len);
2805 if (IS_ERR(data))
2806 return PTR_ERR(data);
2807 ret = ops->set_tunable(dev, &tuna, data);
2808
2809 kfree(data);
2810 return ret;
2811 }
2812
2813 static noinline_for_stack int
2814 ethtool_get_per_queue_coalesce(struct net_device *dev,
2815 void __user *useraddr,
2816 struct ethtool_per_queue_op *per_queue_opt)
2817 {
2818 u32 bit;
2819 int ret;
2820 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2821
2822 if (!dev->ethtool_ops->get_per_queue_coalesce)
2823 return -EOPNOTSUPP;
2824
2825 useraddr += sizeof(*per_queue_opt);
2826
2827 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2828 MAX_NUM_QUEUE);
2829
2830 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2831 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2832
2833 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2834 if (ret != 0)
2835 return ret;
2836 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2837 return -EFAULT;
2838 useraddr += sizeof(coalesce);
2839 }
2840
2841 return 0;
2842 }
2843
2844 static noinline_for_stack int
2845 ethtool_set_per_queue_coalesce(struct net_device *dev,
2846 void __user *useraddr,
2847 struct ethtool_per_queue_op *per_queue_opt)
2848 {
2849 u32 bit;
2850 int i, ret = 0;
2851 int n_queue;
2852 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2853 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2854
2855 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2856 (!dev->ethtool_ops->get_per_queue_coalesce))
2857 return -EOPNOTSUPP;
2858
2859 useraddr += sizeof(*per_queue_opt);
2860
2861 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2862 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2863 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2864 if (!backup)
2865 return -ENOMEM;
2866
2867 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2868 struct ethtool_coalesce coalesce;
2869
2870 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2871 if (ret != 0)
2872 goto roll_back;
2873
2874 tmp++;
2875
2876 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2877 ret = -EFAULT;
2878 goto roll_back;
2879 }
2880
2881 if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2882 ret = -EOPNOTSUPP;
2883 goto roll_back;
2884 }
2885
2886 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2887 if (ret != 0)
2888 goto roll_back;
2889
2890 useraddr += sizeof(coalesce);
2891 }
2892
2893 roll_back:
2894 if (ret != 0) {
2895 tmp = backup;
2896 for_each_set_bit(i, queue_mask, bit) {
2897 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2898 tmp++;
2899 }
2900 }
2901 kfree(backup);
2902
2903 return ret;
2904 }
2905
2906 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2907 void __user *useraddr, u32 sub_cmd)
2908 {
2909 struct ethtool_per_queue_op per_queue_opt;
2910
2911 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2912 return -EFAULT;
2913
2914 if (per_queue_opt.sub_command != sub_cmd)
2915 return -EINVAL;
2916
2917 switch (per_queue_opt.sub_command) {
2918 case ETHTOOL_GCOALESCE:
2919 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2920 case ETHTOOL_SCOALESCE:
2921 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2922 default:
2923 return -EOPNOTSUPP;
2924 }
2925 }
2926
2927 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2928 {
2929 switch (tuna->id) {
2930 case ETHTOOL_PHY_DOWNSHIFT:
2931 case ETHTOOL_PHY_FAST_LINK_DOWN:
2932 if (tuna->len != sizeof(u8) ||
2933 tuna->type_id != ETHTOOL_TUNABLE_U8)
2934 return -EINVAL;
2935 break;
2936 case ETHTOOL_PHY_EDPD:
2937 if (tuna->len != sizeof(u16) ||
2938 tuna->type_id != ETHTOOL_TUNABLE_U16)
2939 return -EINVAL;
2940 break;
2941 default:
2942 return -EINVAL;
2943 }
2944
2945 return 0;
2946 }
2947
2948 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2949 {
2950 struct phy_device *phydev = dev->phydev;
2951 struct ethtool_tunable tuna;
2952 bool phy_drv_tunable;
2953 void *data;
2954 int ret;
2955
2956 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2957 if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
2958 return -EOPNOTSUPP;
2959 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2960 return -EFAULT;
2961 ret = ethtool_phy_tunable_valid(&tuna);
2962 if (ret)
2963 return ret;
2964 data = kzalloc(tuna.len, GFP_USER);
2965 if (!data)
2966 return -ENOMEM;
2967 if (phy_drv_tunable) {
2968 mutex_lock(&phydev->lock);
2969 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2970 mutex_unlock(&phydev->lock);
2971 } else {
2972 ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
2973 }
2974 if (ret)
2975 goto out;
2976 useraddr += sizeof(tuna);
2977 ret = -EFAULT;
2978 if (copy_to_user(useraddr, data, tuna.len))
2979 goto out;
2980 ret = 0;
2981
2982 out:
2983 kfree(data);
2984 return ret;
2985 }
2986
2987 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2988 {
2989 struct phy_device *phydev = dev->phydev;
2990 struct ethtool_tunable tuna;
2991 bool phy_drv_tunable;
2992 void *data;
2993 int ret;
2994
2995 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2996 if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
2997 return -EOPNOTSUPP;
2998 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2999 return -EFAULT;
3000 ret = ethtool_phy_tunable_valid(&tuna);
3001 if (ret)
3002 return ret;
3003 useraddr += sizeof(tuna);
3004 data = memdup_user(useraddr, tuna.len);
3005 if (IS_ERR(data))
3006 return PTR_ERR(data);
3007 if (phy_drv_tunable) {
3008 mutex_lock(&phydev->lock);
3009 ret = phydev->drv->set_tunable(phydev, &tuna, data);
3010 mutex_unlock(&phydev->lock);
3011 } else {
3012 ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
3013 }
3014
3015 kfree(data);
3016 return ret;
3017 }
3018
3019 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
3020 {
3021 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
3022 int rc;
3023
3024 if (!dev->ethtool_ops->get_fecparam)
3025 return -EOPNOTSUPP;
3026
3027 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
3028 if (rc)
3029 return rc;
3030
3031 if (WARN_ON_ONCE(fecparam.reserved))
3032 fecparam.reserved = 0;
3033
3034 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
3035 return -EFAULT;
3036 return 0;
3037 }
3038
3039 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
3040 {
3041 struct ethtool_fecparam fecparam;
3042
3043 if (!dev->ethtool_ops->set_fecparam)
3044 return -EOPNOTSUPP;
3045
3046 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
3047 return -EFAULT;
3048
3049 if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE)
3050 return -EINVAL;
3051
3052 fecparam.active_fec = 0;
3053 fecparam.reserved = 0;
3054
3055 return dev->ethtool_ops->set_fecparam(dev, &fecparam);
3056 }
3057
3058 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
3059
3060 static int
3061 __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr,
3062 u32 ethcmd, struct ethtool_devlink_compat *devlink_state)
3063 {
3064 struct net_device *dev;
3065 u32 sub_cmd;
3066 int rc;
3067 netdev_features_t old_features;
3068
3069 dev = __dev_get_by_name(net, ifr->ifr_name);
3070 if (!dev)
3071 return -ENODEV;
3072
3073 if (ethcmd == ETHTOOL_PERQUEUE) {
3074 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
3075 return -EFAULT;
3076 } else {
3077 sub_cmd = ethcmd;
3078 }
3079 /* Allow some commands to be done by anyone */
3080 switch (sub_cmd) {
3081 case ETHTOOL_GSET:
3082 case ETHTOOL_GDRVINFO:
3083 case ETHTOOL_GMSGLVL:
3084 case ETHTOOL_GLINK:
3085 case ETHTOOL_GCOALESCE:
3086 case ETHTOOL_GRINGPARAM:
3087 case ETHTOOL_GPAUSEPARAM:
3088 case ETHTOOL_GRXCSUM:
3089 case ETHTOOL_GTXCSUM:
3090 case ETHTOOL_GSG:
3091 case ETHTOOL_GSSET_INFO:
3092 case ETHTOOL_GSTRINGS:
3093 case ETHTOOL_GSTATS:
3094 case ETHTOOL_GPHYSTATS:
3095 case ETHTOOL_GTSO:
3096 case ETHTOOL_GPERMADDR:
3097 case ETHTOOL_GUFO:
3098 case ETHTOOL_GGSO:
3099 case ETHTOOL_GGRO:
3100 case ETHTOOL_GFLAGS:
3101 case ETHTOOL_GPFLAGS:
3102 case ETHTOOL_GRXFH:
3103 case ETHTOOL_GRXRINGS:
3104 case ETHTOOL_GRXCLSRLCNT:
3105 case ETHTOOL_GRXCLSRULE:
3106 case ETHTOOL_GRXCLSRLALL:
3107 case ETHTOOL_GRXFHINDIR:
3108 case ETHTOOL_GRSSH:
3109 case ETHTOOL_GFEATURES:
3110 case ETHTOOL_GCHANNELS:
3111 case ETHTOOL_GET_TS_INFO:
3112 case ETHTOOL_GEEE:
3113 case ETHTOOL_GTUNABLE:
3114 case ETHTOOL_PHY_GTUNABLE:
3115 case ETHTOOL_GLINKSETTINGS:
3116 case ETHTOOL_GFECPARAM:
3117 break;
3118 default:
3119 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
3120 return -EPERM;
3121 }
3122
3123 if (dev->dev.parent)
3124 pm_runtime_get_sync(dev->dev.parent);
3125
3126 if (!netif_device_present(dev)) {
3127 rc = -ENODEV;
3128 goto out;
3129 }
3130
3131 if (dev->ethtool_ops->begin) {
3132 rc = dev->ethtool_ops->begin(dev);
3133 if (rc < 0)
3134 goto out;
3135 }
3136 old_features = dev->features;
3137
3138 switch (ethcmd) {
3139 case ETHTOOL_GSET:
3140 rc = ethtool_get_settings(dev, useraddr);
3141 break;
3142 case ETHTOOL_SSET:
3143 rc = ethtool_set_settings(dev, useraddr);
3144 break;
3145 case ETHTOOL_GDRVINFO:
3146 rc = ethtool_get_drvinfo(dev, devlink_state);
3147 break;
3148 case ETHTOOL_GREGS:
3149 rc = ethtool_get_regs(dev, useraddr);
3150 break;
3151 case ETHTOOL_GWOL:
3152 rc = ethtool_get_wol(dev, useraddr);
3153 break;
3154 case ETHTOOL_SWOL:
3155 rc = ethtool_set_wol(dev, useraddr);
3156 break;
3157 case ETHTOOL_GMSGLVL:
3158 rc = ethtool_get_value(dev, useraddr, ethcmd,
3159 dev->ethtool_ops->get_msglevel);
3160 break;
3161 case ETHTOOL_SMSGLVL:
3162 rc = ethtool_set_value_void(dev, useraddr,
3163 dev->ethtool_ops->set_msglevel);
3164 if (!rc)
3165 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
3166 break;
3167 case ETHTOOL_GEEE:
3168 rc = ethtool_get_eee(dev, useraddr);
3169 break;
3170 case ETHTOOL_SEEE:
3171 rc = ethtool_set_eee(dev, useraddr);
3172 break;
3173 case ETHTOOL_NWAY_RST:
3174 rc = ethtool_nway_reset(dev);
3175 break;
3176 case ETHTOOL_GLINK:
3177 rc = ethtool_get_link(dev, useraddr);
3178 break;
3179 case ETHTOOL_GEEPROM:
3180 rc = ethtool_get_eeprom(dev, useraddr);
3181 break;
3182 case ETHTOOL_SEEPROM:
3183 rc = ethtool_set_eeprom(dev, useraddr);
3184 break;
3185 case ETHTOOL_GCOALESCE:
3186 rc = ethtool_get_coalesce(dev, useraddr);
3187 break;
3188 case ETHTOOL_SCOALESCE:
3189 rc = ethtool_set_coalesce(dev, useraddr);
3190 break;
3191 case ETHTOOL_GRINGPARAM:
3192 rc = ethtool_get_ringparam(dev, useraddr);
3193 break;
3194 case ETHTOOL_SRINGPARAM:
3195 rc = ethtool_set_ringparam(dev, useraddr);
3196 break;
3197 case ETHTOOL_GPAUSEPARAM:
3198 rc = ethtool_get_pauseparam(dev, useraddr);
3199 break;
3200 case ETHTOOL_SPAUSEPARAM:
3201 rc = ethtool_set_pauseparam(dev, useraddr);
3202 break;
3203 case ETHTOOL_TEST:
3204 rc = ethtool_self_test(dev, useraddr);
3205 break;
3206 case ETHTOOL_GSTRINGS:
3207 rc = ethtool_get_strings(dev, useraddr);
3208 break;
3209 case ETHTOOL_PHYS_ID:
3210 rc = ethtool_phys_id(dev, useraddr);
3211 break;
3212 case ETHTOOL_GSTATS:
3213 rc = ethtool_get_stats(dev, useraddr);
3214 break;
3215 case ETHTOOL_GPERMADDR:
3216 rc = ethtool_get_perm_addr(dev, useraddr);
3217 break;
3218 case ETHTOOL_GFLAGS:
3219 rc = ethtool_get_value(dev, useraddr, ethcmd,
3220 __ethtool_get_flags);
3221 break;
3222 case ETHTOOL_SFLAGS:
3223 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3224 break;
3225 case ETHTOOL_GPFLAGS:
3226 rc = ethtool_get_value(dev, useraddr, ethcmd,
3227 dev->ethtool_ops->get_priv_flags);
3228 if (!rc)
3229 ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
3230 break;
3231 case ETHTOOL_SPFLAGS:
3232 rc = ethtool_set_value(dev, useraddr,
3233 dev->ethtool_ops->set_priv_flags);
3234 break;
3235 case ETHTOOL_GRXFH:
3236 case ETHTOOL_GRXRINGS:
3237 case ETHTOOL_GRXCLSRLCNT:
3238 case ETHTOOL_GRXCLSRULE:
3239 case ETHTOOL_GRXCLSRLALL:
3240 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
3241 break;
3242 case ETHTOOL_SRXFH:
3243 case ETHTOOL_SRXCLSRLDEL:
3244 case ETHTOOL_SRXCLSRLINS:
3245 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
3246 break;
3247 case ETHTOOL_FLASHDEV:
3248 rc = ethtool_flash_device(dev, devlink_state);
3249 break;
3250 case ETHTOOL_RESET:
3251 rc = ethtool_reset(dev, useraddr);
3252 break;
3253 case ETHTOOL_GSSET_INFO:
3254 rc = ethtool_get_sset_info(dev, useraddr);
3255 break;
3256 case ETHTOOL_GRXFHINDIR:
3257 rc = ethtool_get_rxfh_indir(dev, useraddr);
3258 break;
3259 case ETHTOOL_SRXFHINDIR:
3260 rc = ethtool_set_rxfh_indir(dev, useraddr);
3261 break;
3262 case ETHTOOL_GRSSH:
3263 rc = ethtool_get_rxfh(dev, useraddr);
3264 break;
3265 case ETHTOOL_SRSSH:
3266 rc = ethtool_set_rxfh(dev, useraddr);
3267 break;
3268 case ETHTOOL_GFEATURES:
3269 rc = ethtool_get_features(dev, useraddr);
3270 break;
3271 case ETHTOOL_SFEATURES:
3272 rc = ethtool_set_features(dev, useraddr);
3273 break;
3274 case ETHTOOL_GTXCSUM:
3275 case ETHTOOL_GRXCSUM:
3276 case ETHTOOL_GSG:
3277 case ETHTOOL_GTSO:
3278 case ETHTOOL_GGSO:
3279 case ETHTOOL_GGRO:
3280 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
3281 break;
3282 case ETHTOOL_STXCSUM:
3283 case ETHTOOL_SRXCSUM:
3284 case ETHTOOL_SSG:
3285 case ETHTOOL_STSO:
3286 case ETHTOOL_SGSO:
3287 case ETHTOOL_SGRO:
3288 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
3289 break;
3290 case ETHTOOL_GCHANNELS:
3291 rc = ethtool_get_channels(dev, useraddr);
3292 break;
3293 case ETHTOOL_SCHANNELS:
3294 rc = ethtool_set_channels(dev, useraddr);
3295 break;
3296 case ETHTOOL_SET_DUMP:
3297 rc = ethtool_set_dump(dev, useraddr);
3298 break;
3299 case ETHTOOL_GET_DUMP_FLAG:
3300 rc = ethtool_get_dump_flag(dev, useraddr);
3301 break;
3302 case ETHTOOL_GET_DUMP_DATA:
3303 rc = ethtool_get_dump_data(dev, useraddr);
3304 break;
3305 case ETHTOOL_GET_TS_INFO:
3306 rc = ethtool_get_ts_info(dev, useraddr);
3307 break;
3308 case ETHTOOL_GMODULEINFO:
3309 rc = ethtool_get_module_info(dev, useraddr);
3310 break;
3311 case ETHTOOL_GMODULEEEPROM:
3312 rc = ethtool_get_module_eeprom(dev, useraddr);
3313 break;
3314 case ETHTOOL_GTUNABLE:
3315 rc = ethtool_get_tunable(dev, useraddr);
3316 break;
3317 case ETHTOOL_STUNABLE:
3318 rc = ethtool_set_tunable(dev, useraddr);
3319 break;
3320 case ETHTOOL_GPHYSTATS:
3321 rc = ethtool_get_phy_stats(dev, useraddr);
3322 break;
3323 case ETHTOOL_PERQUEUE:
3324 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
3325 break;
3326 case ETHTOOL_GLINKSETTINGS:
3327 rc = ethtool_get_link_ksettings(dev, useraddr);
3328 break;
3329 case ETHTOOL_SLINKSETTINGS:
3330 rc = ethtool_set_link_ksettings(dev, useraddr);
3331 break;
3332 case ETHTOOL_PHY_GTUNABLE:
3333 rc = get_phy_tunable(dev, useraddr);
3334 break;
3335 case ETHTOOL_PHY_STUNABLE:
3336 rc = set_phy_tunable(dev, useraddr);
3337 break;
3338 case ETHTOOL_GFECPARAM:
3339 rc = ethtool_get_fecparam(dev, useraddr);
3340 break;
3341 case ETHTOOL_SFECPARAM:
3342 rc = ethtool_set_fecparam(dev, useraddr);
3343 break;
3344 default:
3345 rc = -EOPNOTSUPP;
3346 }
3347
3348 if (dev->ethtool_ops->complete)
3349 dev->ethtool_ops->complete(dev);
3350
3351 if (old_features != dev->features)
3352 netdev_features_change(dev);
3353 out:
3354 if (dev->dev.parent)
3355 pm_runtime_put(dev->dev.parent);
3356
3357 return rc;
3358 }
3359
3360 int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
3361 {
3362 struct ethtool_devlink_compat *state;
3363 u32 ethcmd;
3364 int rc;
3365
3366 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
3367 return -EFAULT;
3368
3369 state = kzalloc(sizeof(*state), GFP_KERNEL);
3370 if (!state)
3371 return -ENOMEM;
3372
3373 switch (ethcmd) {
3374 case ETHTOOL_FLASHDEV:
3375 if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) {
3376 rc = -EFAULT;
3377 goto exit_free;
3378 }
3379 state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
3380 break;
3381 }
3382
3383 rtnl_lock();
3384 rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state);
3385 rtnl_unlock();
3386 if (rc)
3387 goto exit_free;
3388
3389 switch (ethcmd) {
3390 case ETHTOOL_FLASHDEV:
3391 if (state->devlink)
3392 rc = devlink_compat_flash_update(state->devlink,
3393 state->efl.data);
3394 break;
3395 case ETHTOOL_GDRVINFO:
3396 if (state->devlink)
3397 devlink_compat_running_version(state->devlink,
3398 state->info.fw_version,
3399 sizeof(state->info.fw_version));
3400 if (copy_to_user(useraddr, &state->info, sizeof(state->info))) {
3401 rc = -EFAULT;
3402 goto exit_free;
3403 }
3404 break;
3405 }
3406
3407 exit_free:
3408 if (state->devlink)
3409 devlink_put(state->devlink);
3410 kfree(state);
3411 return rc;
3412 }
3413
3414 struct ethtool_rx_flow_key {
3415 struct flow_dissector_key_basic basic;
3416 union {
3417 struct flow_dissector_key_ipv4_addrs ipv4;
3418 struct flow_dissector_key_ipv6_addrs ipv6;
3419 };
3420 struct flow_dissector_key_ports tp;
3421 struct flow_dissector_key_ip ip;
3422 struct flow_dissector_key_vlan vlan;
3423 struct flow_dissector_key_eth_addrs eth_addrs;
3424 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
3425
3426 struct ethtool_rx_flow_match {
3427 struct flow_dissector dissector;
3428 struct ethtool_rx_flow_key key;
3429 struct ethtool_rx_flow_key mask;
3430 };
3431
3432 struct ethtool_rx_flow_rule *
3433 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
3434 {
3435 const struct ethtool_rx_flow_spec *fs = input->fs;
3436 struct ethtool_rx_flow_match *match;
3437 struct ethtool_rx_flow_rule *flow;
3438 struct flow_action_entry *act;
3439
3440 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
3441 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
3442 if (!flow)
3443 return ERR_PTR(-ENOMEM);
3444
3445 /* ethtool_rx supports only one single action per rule. */
3446 flow->rule = flow_rule_alloc(1);
3447 if (!flow->rule) {
3448 kfree(flow);
3449 return ERR_PTR(-ENOMEM);
3450 }
3451
3452 match = (struct ethtool_rx_flow_match *)flow->priv;
3453 flow->rule->match.dissector = &match->dissector;
3454 flow->rule->match.mask = &match->mask;
3455 flow->rule->match.key = &match->key;
3456
3457 match->mask.basic.n_proto = htons(0xffff);
3458
3459 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3460 case ETHER_FLOW: {
3461 const struct ethhdr *ether_spec, *ether_m_spec;
3462
3463 ether_spec = &fs->h_u.ether_spec;
3464 ether_m_spec = &fs->m_u.ether_spec;
3465
3466 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
3467 ether_addr_copy(match->key.eth_addrs.src,
3468 ether_spec->h_source);
3469 ether_addr_copy(match->mask.eth_addrs.src,
3470 ether_m_spec->h_source);
3471 }
3472 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
3473 ether_addr_copy(match->key.eth_addrs.dst,
3474 ether_spec->h_dest);
3475 ether_addr_copy(match->mask.eth_addrs.dst,
3476 ether_m_spec->h_dest);
3477 }
3478 if (ether_m_spec->h_proto) {
3479 match->key.basic.n_proto = ether_spec->h_proto;
3480 match->mask.basic.n_proto = ether_m_spec->h_proto;
3481 }
3482 }
3483 break;
3484 case TCP_V4_FLOW:
3485 case UDP_V4_FLOW: {
3486 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
3487
3488 match->key.basic.n_proto = htons(ETH_P_IP);
3489
3490 v4_spec = &fs->h_u.tcp_ip4_spec;
3491 v4_m_spec = &fs->m_u.tcp_ip4_spec;
3492
3493 if (v4_m_spec->ip4src) {
3494 match->key.ipv4.src = v4_spec->ip4src;
3495 match->mask.ipv4.src = v4_m_spec->ip4src;
3496 }
3497 if (v4_m_spec->ip4dst) {
3498 match->key.ipv4.dst = v4_spec->ip4dst;
3499 match->mask.ipv4.dst = v4_m_spec->ip4dst;
3500 }
3501 if (v4_m_spec->ip4src ||
3502 v4_m_spec->ip4dst) {
3503 match->dissector.used_keys |=
3504 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
3505 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
3506 offsetof(struct ethtool_rx_flow_key, ipv4);
3507 }
3508 if (v4_m_spec->psrc) {
3509 match->key.tp.src = v4_spec->psrc;
3510 match->mask.tp.src = v4_m_spec->psrc;
3511 }
3512 if (v4_m_spec->pdst) {
3513 match->key.tp.dst = v4_spec->pdst;
3514 match->mask.tp.dst = v4_m_spec->pdst;
3515 }
3516 if (v4_m_spec->psrc ||
3517 v4_m_spec->pdst) {
3518 match->dissector.used_keys |=
3519 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3520 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3521 offsetof(struct ethtool_rx_flow_key, tp);
3522 }
3523 if (v4_m_spec->tos) {
3524 match->key.ip.tos = v4_spec->tos;
3525 match->mask.ip.tos = v4_m_spec->tos;
3526 match->dissector.used_keys |=
3527 BIT(FLOW_DISSECTOR_KEY_IP);
3528 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3529 offsetof(struct ethtool_rx_flow_key, ip);
3530 }
3531 }
3532 break;
3533 case TCP_V6_FLOW:
3534 case UDP_V6_FLOW: {
3535 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
3536
3537 match->key.basic.n_proto = htons(ETH_P_IPV6);
3538
3539 v6_spec = &fs->h_u.tcp_ip6_spec;
3540 v6_m_spec = &fs->m_u.tcp_ip6_spec;
3541 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) {
3542 memcpy(&match->key.ipv6.src, v6_spec->ip6src,
3543 sizeof(match->key.ipv6.src));
3544 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
3545 sizeof(match->mask.ipv6.src));
3546 }
3547 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3548 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
3549 sizeof(match->key.ipv6.dst));
3550 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
3551 sizeof(match->mask.ipv6.dst));
3552 }
3553 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) ||
3554 !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3555 match->dissector.used_keys |=
3556 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
3557 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
3558 offsetof(struct ethtool_rx_flow_key, ipv6);
3559 }
3560 if (v6_m_spec->psrc) {
3561 match->key.tp.src = v6_spec->psrc;
3562 match->mask.tp.src = v6_m_spec->psrc;
3563 }
3564 if (v6_m_spec->pdst) {
3565 match->key.tp.dst = v6_spec->pdst;
3566 match->mask.tp.dst = v6_m_spec->pdst;
3567 }
3568 if (v6_m_spec->psrc ||
3569 v6_m_spec->pdst) {
3570 match->dissector.used_keys |=
3571 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3572 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3573 offsetof(struct ethtool_rx_flow_key, tp);
3574 }
3575 if (v6_m_spec->tclass) {
3576 match->key.ip.tos = v6_spec->tclass;
3577 match->mask.ip.tos = v6_m_spec->tclass;
3578 match->dissector.used_keys |=
3579 BIT_ULL(FLOW_DISSECTOR_KEY_IP);
3580 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3581 offsetof(struct ethtool_rx_flow_key, ip);
3582 }
3583 }
3584 break;
3585 default:
3586 ethtool_rx_flow_rule_destroy(flow);
3587 return ERR_PTR(-EINVAL);
3588 }
3589
3590 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3591 case TCP_V4_FLOW:
3592 case TCP_V6_FLOW:
3593 match->key.basic.ip_proto = IPPROTO_TCP;
3594 match->mask.basic.ip_proto = 0xff;
3595 break;
3596 case UDP_V4_FLOW:
3597 case UDP_V6_FLOW:
3598 match->key.basic.ip_proto = IPPROTO_UDP;
3599 match->mask.basic.ip_proto = 0xff;
3600 break;
3601 }
3602
3603 match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC);
3604 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3605 offsetof(struct ethtool_rx_flow_key, basic);
3606
3607 if (fs->flow_type & FLOW_EXT) {
3608 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3609 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3610
3611 if (ext_m_spec->vlan_etype) {
3612 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3613 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3614 }
3615
3616 if (ext_m_spec->vlan_tci) {
3617 match->key.vlan.vlan_id =
3618 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3619 match->mask.vlan.vlan_id =
3620 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3621
3622 match->key.vlan.vlan_dei =
3623 !!(ext_h_spec->vlan_tci & htons(0x1000));
3624 match->mask.vlan.vlan_dei =
3625 !!(ext_m_spec->vlan_tci & htons(0x1000));
3626
3627 match->key.vlan.vlan_priority =
3628 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3629 match->mask.vlan.vlan_priority =
3630 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3631 }
3632
3633 if (ext_m_spec->vlan_etype ||
3634 ext_m_spec->vlan_tci) {
3635 match->dissector.used_keys |=
3636 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN);
3637 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3638 offsetof(struct ethtool_rx_flow_key, vlan);
3639 }
3640 }
3641 if (fs->flow_type & FLOW_MAC_EXT) {
3642 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3643 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3644
3645 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3646 ETH_ALEN);
3647 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3648 ETH_ALEN);
3649
3650 match->dissector.used_keys |=
3651 BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3652 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3653 offsetof(struct ethtool_rx_flow_key, eth_addrs);
3654 }
3655
3656 act = &flow->rule->action.entries[0];
3657 switch (fs->ring_cookie) {
3658 case RX_CLS_FLOW_DISC:
3659 act->id = FLOW_ACTION_DROP;
3660 break;
3661 case RX_CLS_FLOW_WAKE:
3662 act->id = FLOW_ACTION_WAKE;
3663 break;
3664 default:
3665 act->id = FLOW_ACTION_QUEUE;
3666 if (fs->flow_type & FLOW_RSS)
3667 act->queue.ctx = input->rss_ctx;
3668
3669 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3670 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3671 break;
3672 }
3673
3674 return flow;
3675 }
3676 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3677
3678 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3679 {
3680 kfree(flow->rule);
3681 kfree(flow);
3682 }
3683 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);
Kernel DRM miscellaneous fixes and cross-tree changes