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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 */
38struct ethtool_devlink_compat {
39 struct devlink *devlink;
40 union {
41 struct ethtool_flash efl;
42 struct ethtool_drvinfo info;
43 };
44};
45
46static 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
59u32 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}
66EXPORT_SYMBOL(ethtool_op_get_link);
67
68int 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}
78EXPORT_SYMBOL(ethtool_op_get_ts_info);
79
80/* Handlers for each ethtool command */
81
82static 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
121static 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
161static 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
192static 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
220static 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
249static 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
263static 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
293static 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
311static 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. */
343void 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}
356EXPORT_SYMBOL(ethtool_intersect_link_masks);
357
358void 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}
364EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
365
366/* return false if src had higher bits set. lower bits always updated. */
367bool 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}
374EXPORT_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 */
379static bool
380convert_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 */
427struct 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. */
437int __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}
451EXPORT_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 */
456static 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 */
479bool 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 */
500static int
501store_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. */
524static 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. */
581static 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
625int 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}
644EXPORT_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 */
655static 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 */
691static 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
716static int
717ethtool_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
778static 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
829out:
830 kfree(info_buf);
831 return ret;
832}
833
834static noinline_for_stack int
835ethtool_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
879static 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
892static 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
921static 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
953static 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
980static 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 /* Nonzero ring with RSS only makes sense if NIC adds them together */
996 if (cmd == ETHTOOL_SRXCLSRLINS && info.fs.flow_type & FLOW_RSS &&
997 !ops->cap_rss_rxnfc_adds &&
998 ethtool_get_flow_spec_ring(info.fs.ring_cookie))
999 return -EINVAL;
1000
1001 if (cmd == ETHTOOL_SRXFH && ops->get_rxfh) {
1002 struct ethtool_rxfh_param rxfh = {};
1003
1004 rc = ops->get_rxfh(dev, &rxfh);
1005 if (rc)
1006 return rc;
1007
1008 /* Sanity check: if symmetric-xor is set, then:
1009 * 1 - no other fields besides IP src/dst and/or L4 src/dst
1010 * 2 - If src is set, dst must also be set
1011 */
1012 if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
1013 ((info.data & ~(RXH_IP_SRC | RXH_IP_DST |
1014 RXH_L4_B_0_1 | RXH_L4_B_2_3)) ||
1015 (!!(info.data & RXH_IP_SRC) ^ !!(info.data & RXH_IP_DST)) ||
1016 (!!(info.data & RXH_L4_B_0_1) ^ !!(info.data & RXH_L4_B_2_3))))
1017 return -EINVAL;
1018 }
1019
1020 rc = ops->set_rxnfc(dev, &info);
1021 if (rc)
1022 return rc;
1023
1024 if (cmd == ETHTOOL_SRXCLSRLINS &&
1025 ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
1026 return -EFAULT;
1027
1028 return 0;
1029}
1030
1031static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1032 u32 cmd, void __user *useraddr)
1033{
1034 struct ethtool_rxnfc info;
1035 size_t info_size = sizeof(info);
1036 const struct ethtool_ops *ops = dev->ethtool_ops;
1037 int ret;
1038 void *rule_buf = NULL;
1039
1040 if (!ops->get_rxnfc)
1041 return -EOPNOTSUPP;
1042
1043 ret = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
1044 if (ret)
1045 return ret;
1046
1047 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1048 if (info.rule_cnt > 0) {
1049 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1050 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
1051 GFP_USER);
1052 if (!rule_buf)
1053 return -ENOMEM;
1054 }
1055 }
1056
1057 ret = ops->get_rxnfc(dev, &info, rule_buf);
1058 if (ret < 0)
1059 goto err_out;
1060
1061 ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
1062err_out:
1063 kfree(rule_buf);
1064
1065 return ret;
1066}
1067
1068static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1069 struct ethtool_rxnfc *rx_rings,
1070 u32 size)
1071{
1072 int i;
1073
1074 if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0]))))
1075 return -EFAULT;
1076
1077 /* Validate ring indices */
1078 for (i = 0; i < size; i++)
1079 if (indir[i] >= rx_rings->data)
1080 return -EINVAL;
1081
1082 return 0;
1083}
1084
1085u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1086
1087void netdev_rss_key_fill(void *buffer, size_t len)
1088{
1089 BUG_ON(len > sizeof(netdev_rss_key));
1090 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1091 memcpy(buffer, netdev_rss_key, len);
1092}
1093EXPORT_SYMBOL(netdev_rss_key_fill);
1094
1095static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1096 void __user *useraddr)
1097{
1098 struct ethtool_rxfh_param rxfh = {};
1099 u32 user_size;
1100 int ret;
1101
1102 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1103 !dev->ethtool_ops->get_rxfh)
1104 return -EOPNOTSUPP;
1105 rxfh.indir_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1106 if (rxfh.indir_size == 0)
1107 return -EOPNOTSUPP;
1108
1109 if (copy_from_user(&user_size,
1110 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1111 sizeof(user_size)))
1112 return -EFAULT;
1113
1114 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1115 &rxfh.indir_size, sizeof(rxfh.indir_size)))
1116 return -EFAULT;
1117
1118 /* If the user buffer size is 0, this is just a query for the
1119 * device table size. Otherwise, if it's smaller than the
1120 * device table size it's an error.
1121 */
1122 if (user_size < rxfh.indir_size)
1123 return user_size == 0 ? 0 : -EINVAL;
1124
1125 rxfh.indir = kcalloc(rxfh.indir_size, sizeof(rxfh.indir[0]), GFP_USER);
1126 if (!rxfh.indir)
1127 return -ENOMEM;
1128
1129 ret = dev->ethtool_ops->get_rxfh(dev, &rxfh);
1130 if (ret)
1131 goto out;
1132 if (copy_to_user(useraddr +
1133 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1134 rxfh.indir, rxfh.indir_size * sizeof(*rxfh.indir)))
1135 ret = -EFAULT;
1136
1137out:
1138 kfree(rxfh.indir);
1139 return ret;
1140}
1141
1142static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1143 void __user *useraddr)
1144{
1145 const struct ethtool_ops *ops = dev->ethtool_ops;
1146 struct ethtool_rxfh_param rxfh_dev = {};
1147 struct netlink_ext_ack *extack = NULL;
1148 struct ethtool_rxnfc rx_rings;
1149 u32 user_size, i;
1150 int ret;
1151 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1152
1153 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1154 !ops->get_rxnfc)
1155 return -EOPNOTSUPP;
1156
1157 rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1158 if (rxfh_dev.indir_size == 0)
1159 return -EOPNOTSUPP;
1160
1161 if (copy_from_user(&user_size,
1162 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1163 sizeof(user_size)))
1164 return -EFAULT;
1165
1166 if (user_size != 0 && user_size != rxfh_dev.indir_size)
1167 return -EINVAL;
1168
1169 rxfh_dev.indir = kcalloc(rxfh_dev.indir_size,
1170 sizeof(rxfh_dev.indir[0]), GFP_USER);
1171 if (!rxfh_dev.indir)
1172 return -ENOMEM;
1173
1174 rx_rings.cmd = ETHTOOL_GRXRINGS;
1175 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1176 if (ret)
1177 goto out;
1178
1179 if (user_size == 0) {
1180 u32 *indir = rxfh_dev.indir;
1181
1182 for (i = 0; i < rxfh_dev.indir_size; i++)
1183 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1184 } else {
1185 ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1186 useraddr + ringidx_offset,
1187 &rx_rings,
1188 rxfh_dev.indir_size);
1189 if (ret)
1190 goto out;
1191 }
1192
1193 rxfh_dev.hfunc = ETH_RSS_HASH_NO_CHANGE;
1194 ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1195 if (ret)
1196 goto out;
1197
1198 /* indicate whether rxfh was set to default */
1199 if (user_size == 0)
1200 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1201 else
1202 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1203
1204out:
1205 kfree(rxfh_dev.indir);
1206 return ret;
1207}
1208
1209static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1210 void __user *useraddr)
1211{
1212 const struct ethtool_ops *ops = dev->ethtool_ops;
1213 struct ethtool_rxfh_param rxfh_dev = {};
1214 u32 user_indir_size, user_key_size;
1215 struct ethtool_rxfh_context *ctx;
1216 struct ethtool_rxfh rxfh;
1217 u32 indir_bytes;
1218 u8 *rss_config;
1219 u32 total_size;
1220 int ret;
1221
1222 if (!ops->get_rxfh)
1223 return -EOPNOTSUPP;
1224
1225 if (ops->get_rxfh_indir_size)
1226 rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1227 if (ops->get_rxfh_key_size)
1228 rxfh_dev.key_size = ops->get_rxfh_key_size(dev);
1229
1230 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1231 return -EFAULT;
1232 user_indir_size = rxfh.indir_size;
1233 user_key_size = rxfh.key_size;
1234
1235 /* Check that reserved fields are 0 for now */
1236 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1237 return -EINVAL;
1238 /* Most drivers don't handle rss_context, check it's 0 as well */
1239 if (rxfh.rss_context && !(ops->cap_rss_ctx_supported ||
1240 ops->create_rxfh_context))
1241 return -EOPNOTSUPP;
1242
1243 rxfh.indir_size = rxfh_dev.indir_size;
1244 rxfh.key_size = rxfh_dev.key_size;
1245 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1246 return -EFAULT;
1247
1248 if ((user_indir_size && user_indir_size != rxfh_dev.indir_size) ||
1249 (user_key_size && user_key_size != rxfh_dev.key_size))
1250 return -EINVAL;
1251
1252 indir_bytes = user_indir_size * sizeof(rxfh_dev.indir[0]);
1253 total_size = indir_bytes + user_key_size;
1254 rss_config = kzalloc(total_size, GFP_USER);
1255 if (!rss_config)
1256 return -ENOMEM;
1257
1258 if (user_indir_size)
1259 rxfh_dev.indir = (u32 *)rss_config;
1260
1261 if (user_key_size)
1262 rxfh_dev.key = rss_config + indir_bytes;
1263
1264 if (rxfh.rss_context) {
1265 ctx = xa_load(&dev->ethtool->rss_ctx, rxfh.rss_context);
1266 if (!ctx) {
1267 ret = -ENOENT;
1268 goto out;
1269 }
1270 if (rxfh_dev.indir)
1271 memcpy(rxfh_dev.indir, ethtool_rxfh_context_indir(ctx),
1272 indir_bytes);
1273 if (!ops->rxfh_per_ctx_key) {
1274 rxfh_dev.key_size = 0;
1275 } else {
1276 if (rxfh_dev.key)
1277 memcpy(rxfh_dev.key,
1278 ethtool_rxfh_context_key(ctx),
1279 user_key_size);
1280 rxfh_dev.hfunc = ctx->hfunc;
1281 }
1282 rxfh_dev.input_xfrm = ctx->input_xfrm;
1283 ret = 0;
1284 } else {
1285 ret = dev->ethtool_ops->get_rxfh(dev, &rxfh_dev);
1286 if (ret)
1287 goto out;
1288 }
1289
1290 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1291 &rxfh_dev.hfunc, sizeof(rxfh.hfunc))) {
1292 ret = -EFAULT;
1293 } else if (copy_to_user(useraddr +
1294 offsetof(struct ethtool_rxfh, input_xfrm),
1295 &rxfh_dev.input_xfrm,
1296 sizeof(rxfh.input_xfrm))) {
1297 ret = -EFAULT;
1298 } else if (copy_to_user(useraddr +
1299 offsetof(struct ethtool_rxfh, key_size),
1300 &rxfh_dev.key_size,
1301 sizeof(rxfh.key_size))) {
1302 ret = -EFAULT;
1303 } else if (copy_to_user(useraddr +
1304 offsetof(struct ethtool_rxfh, rss_config[0]),
1305 rss_config, total_size)) {
1306 ret = -EFAULT;
1307 }
1308out:
1309 kfree(rss_config);
1310
1311 return ret;
1312}
1313
1314static struct ethtool_rxfh_context *
1315ethtool_rxfh_ctx_alloc(const struct ethtool_ops *ops,
1316 u32 indir_size, u32 key_size)
1317{
1318 size_t indir_bytes, flex_len, key_off, size;
1319 struct ethtool_rxfh_context *ctx;
1320 u32 priv_bytes, indir_max;
1321 u16 key_max;
1322
1323 key_max = max(key_size, ops->rxfh_key_space);
1324 indir_max = max(indir_size, ops->rxfh_indir_space);
1325
1326 priv_bytes = ALIGN(ops->rxfh_priv_size, sizeof(u32));
1327 indir_bytes = array_size(indir_max, sizeof(u32));
1328
1329 key_off = size_add(priv_bytes, indir_bytes);
1330 flex_len = size_add(key_off, key_max);
1331 size = struct_size_t(struct ethtool_rxfh_context, data, flex_len);
1332
1333 ctx = kzalloc(size, GFP_KERNEL_ACCOUNT);
1334 if (!ctx)
1335 return NULL;
1336
1337 ctx->indir_size = indir_size;
1338 ctx->key_size = key_size;
1339 ctx->key_off = key_off;
1340 ctx->priv_size = ops->rxfh_priv_size;
1341
1342 ctx->hfunc = ETH_RSS_HASH_NO_CHANGE;
1343 ctx->input_xfrm = RXH_XFRM_NO_CHANGE;
1344
1345 return ctx;
1346}
1347
1348static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1349 void __user *useraddr)
1350{
1351 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1352 const struct ethtool_ops *ops = dev->ethtool_ops;
1353 u32 dev_indir_size = 0, dev_key_size = 0, i;
1354 u32 user_indir_len = 0, indir_bytes = 0;
1355 struct ethtool_rxfh_param rxfh_dev = {};
1356 struct ethtool_rxfh_context *ctx = NULL;
1357 struct netlink_ext_ack *extack = NULL;
1358 struct ethtool_rxnfc rx_rings;
1359 struct ethtool_rxfh rxfh;
1360 bool locked = false; /* dev->ethtool->rss_lock taken */
1361 bool create = false;
1362 u8 *rss_config;
1363 int ret;
1364
1365 if (!ops->get_rxnfc || !ops->set_rxfh)
1366 return -EOPNOTSUPP;
1367
1368 if (ops->get_rxfh_indir_size)
1369 dev_indir_size = ops->get_rxfh_indir_size(dev);
1370 if (ops->get_rxfh_key_size)
1371 dev_key_size = ops->get_rxfh_key_size(dev);
1372
1373 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1374 return -EFAULT;
1375
1376 /* Check that reserved fields are 0 for now */
1377 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1378 return -EINVAL;
1379 /* Most drivers don't handle rss_context, check it's 0 as well */
1380 if (rxfh.rss_context && !(ops->cap_rss_ctx_supported ||
1381 ops->create_rxfh_context))
1382 return -EOPNOTSUPP;
1383 /* Check input data transformation capabilities */
1384 if (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_SYM_XOR &&
1385 rxfh.input_xfrm != RXH_XFRM_NO_CHANGE)
1386 return -EINVAL;
1387 if (rxfh.input_xfrm != RXH_XFRM_NO_CHANGE &&
1388 (rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
1389 !ops->cap_rss_sym_xor_supported)
1390 return -EOPNOTSUPP;
1391 create = rxfh.rss_context == ETH_RXFH_CONTEXT_ALLOC;
1392
1393 if ((rxfh.indir_size &&
1394 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1395 rxfh.indir_size != dev_indir_size) ||
1396 (rxfh.key_size && rxfh.key_size != dev_key_size))
1397 return -EINVAL;
1398
1399 /* Must request at least one change: indir size, hash key, function
1400 * or input transformation.
1401 * There's no need for any of it in case of context creation.
1402 */
1403 if (!create &&
1404 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1405 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE &&
1406 rxfh.input_xfrm == RXH_XFRM_NO_CHANGE))
1407 return -EINVAL;
1408
1409 indir_bytes = dev_indir_size * sizeof(rxfh_dev.indir[0]);
1410
1411 /* Check settings which may be global rather than per RSS-context */
1412 if (rxfh.rss_context && !ops->rxfh_per_ctx_key)
1413 if (rxfh.key_size ||
1414 (rxfh.hfunc && rxfh.hfunc != ETH_RSS_HASH_NO_CHANGE) ||
1415 (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_NO_CHANGE))
1416 return -EOPNOTSUPP;
1417
1418 rss_config = kzalloc(indir_bytes + dev_key_size, GFP_USER);
1419 if (!rss_config)
1420 return -ENOMEM;
1421
1422 rx_rings.cmd = ETHTOOL_GRXRINGS;
1423 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1424 if (ret)
1425 goto out;
1426
1427 /* rxfh.indir_size == 0 means reset the indir table to default (master
1428 * context) or delete the context (other RSS contexts).
1429 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1430 */
1431 if (rxfh.indir_size &&
1432 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1433 user_indir_len = indir_bytes;
1434 rxfh_dev.indir = (u32 *)rss_config;
1435 rxfh_dev.indir_size = dev_indir_size;
1436 ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1437 useraddr + rss_cfg_offset,
1438 &rx_rings,
1439 rxfh.indir_size);
1440 if (ret)
1441 goto out;
1442 } else if (rxfh.indir_size == 0) {
1443 if (rxfh.rss_context == 0) {
1444 u32 *indir;
1445
1446 rxfh_dev.indir = (u32 *)rss_config;
1447 rxfh_dev.indir_size = dev_indir_size;
1448 indir = rxfh_dev.indir;
1449 for (i = 0; i < dev_indir_size; i++)
1450 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1451 } else {
1452 rxfh_dev.rss_delete = true;
1453 }
1454 }
1455
1456 if (rxfh.key_size) {
1457 rxfh_dev.key_size = dev_key_size;
1458 rxfh_dev.key = rss_config + indir_bytes;
1459 if (copy_from_user(rxfh_dev.key,
1460 useraddr + rss_cfg_offset + user_indir_len,
1461 rxfh.key_size)) {
1462 ret = -EFAULT;
1463 goto out;
1464 }
1465 }
1466
1467 if (rxfh.rss_context) {
1468 mutex_lock(&dev->ethtool->rss_lock);
1469 locked = true;
1470 }
1471
1472 if (rxfh.rss_context && rxfh_dev.rss_delete) {
1473 ret = ethtool_check_rss_ctx_busy(dev, rxfh.rss_context);
1474 if (ret)
1475 goto out;
1476 }
1477
1478 if (create) {
1479 if (rxfh_dev.rss_delete) {
1480 ret = -EINVAL;
1481 goto out;
1482 }
1483 ctx = ethtool_rxfh_ctx_alloc(ops, dev_indir_size, dev_key_size);
1484 if (!ctx) {
1485 ret = -ENOMEM;
1486 goto out;
1487 }
1488
1489 if (ops->create_rxfh_context) {
1490 u32 limit = ops->rxfh_max_num_contexts ?: U32_MAX;
1491 u32 ctx_id;
1492
1493 /* driver uses new API, core allocates ID */
1494 ret = xa_alloc(&dev->ethtool->rss_ctx, &ctx_id, ctx,
1495 XA_LIMIT(1, limit - 1),
1496 GFP_KERNEL_ACCOUNT);
1497 if (ret < 0) {
1498 kfree(ctx);
1499 goto out;
1500 }
1501 WARN_ON(!ctx_id); /* can't happen */
1502 rxfh.rss_context = ctx_id;
1503 }
1504 } else if (rxfh.rss_context) {
1505 ctx = xa_load(&dev->ethtool->rss_ctx, rxfh.rss_context);
1506 if (!ctx) {
1507 ret = -ENOENT;
1508 goto out;
1509 }
1510 }
1511 rxfh_dev.hfunc = rxfh.hfunc;
1512 rxfh_dev.rss_context = rxfh.rss_context;
1513 rxfh_dev.input_xfrm = rxfh.input_xfrm;
1514
1515 if (rxfh.rss_context && ops->create_rxfh_context) {
1516 if (create) {
1517 ret = ops->create_rxfh_context(dev, ctx, &rxfh_dev,
1518 extack);
1519 /* Make sure driver populates defaults */
1520 WARN_ON_ONCE(!ret && !rxfh_dev.key &&
1521 ops->rxfh_per_ctx_key &&
1522 !memchr_inv(ethtool_rxfh_context_key(ctx),
1523 0, ctx->key_size));
1524 } else if (rxfh_dev.rss_delete) {
1525 ret = ops->remove_rxfh_context(dev, ctx,
1526 rxfh.rss_context,
1527 extack);
1528 } else {
1529 ret = ops->modify_rxfh_context(dev, ctx, &rxfh_dev,
1530 extack);
1531 }
1532 } else {
1533 ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1534 }
1535 if (ret) {
1536 if (create) {
1537 /* failed to create, free our new tracking entry */
1538 if (ops->create_rxfh_context)
1539 xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context);
1540 kfree(ctx);
1541 }
1542 goto out;
1543 }
1544
1545 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1546 &rxfh_dev.rss_context, sizeof(rxfh_dev.rss_context)))
1547 ret = -EFAULT;
1548
1549 if (!rxfh_dev.rss_context) {
1550 /* indicate whether rxfh was set to default */
1551 if (rxfh.indir_size == 0)
1552 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1553 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1554 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1555 }
1556 /* Update rss_ctx tracking */
1557 if (create && !ops->create_rxfh_context) {
1558 /* driver uses old API, it chose context ID */
1559 if (WARN_ON(xa_load(&dev->ethtool->rss_ctx, rxfh_dev.rss_context))) {
1560 /* context ID reused, our tracking is screwed */
1561 kfree(ctx);
1562 goto out;
1563 }
1564 /* Allocate the exact ID the driver gave us */
1565 if (xa_is_err(xa_store(&dev->ethtool->rss_ctx, rxfh_dev.rss_context,
1566 ctx, GFP_KERNEL))) {
1567 kfree(ctx);
1568 goto out;
1569 }
1570
1571 /* Fetch the defaults for the old API, in the new API drivers
1572 * should write defaults into ctx themselves.
1573 */
1574 rxfh_dev.indir = (u32 *)rss_config;
1575 rxfh_dev.indir_size = dev_indir_size;
1576
1577 rxfh_dev.key = rss_config + indir_bytes;
1578 rxfh_dev.key_size = dev_key_size;
1579
1580 ret = ops->get_rxfh(dev, &rxfh_dev);
1581 if (WARN_ON(ret)) {
1582 xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context);
1583 kfree(ctx);
1584 goto out;
1585 }
1586 }
1587 if (rxfh_dev.rss_delete) {
1588 WARN_ON(xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context) != ctx);
1589 kfree(ctx);
1590 } else if (ctx) {
1591 if (rxfh_dev.indir) {
1592 for (i = 0; i < dev_indir_size; i++)
1593 ethtool_rxfh_context_indir(ctx)[i] = rxfh_dev.indir[i];
1594 ctx->indir_configured =
1595 rxfh.indir_size &&
1596 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE;
1597 }
1598 if (rxfh_dev.key) {
1599 memcpy(ethtool_rxfh_context_key(ctx), rxfh_dev.key,
1600 dev_key_size);
1601 ctx->key_configured = !!rxfh.key_size;
1602 }
1603 if (rxfh_dev.hfunc != ETH_RSS_HASH_NO_CHANGE)
1604 ctx->hfunc = rxfh_dev.hfunc;
1605 if (rxfh_dev.input_xfrm != RXH_XFRM_NO_CHANGE)
1606 ctx->input_xfrm = rxfh_dev.input_xfrm;
1607 }
1608
1609out:
1610 if (locked)
1611 mutex_unlock(&dev->ethtool->rss_lock);
1612 kfree(rss_config);
1613 return ret;
1614}
1615
1616static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1617{
1618 struct ethtool_regs regs;
1619 const struct ethtool_ops *ops = dev->ethtool_ops;
1620 void *regbuf;
1621 int reglen, ret;
1622
1623 if (!ops->get_regs || !ops->get_regs_len)
1624 return -EOPNOTSUPP;
1625
1626 if (copy_from_user(®s, useraddr, sizeof(regs)))
1627 return -EFAULT;
1628
1629 reglen = ops->get_regs_len(dev);
1630 if (reglen <= 0)
1631 return reglen;
1632
1633 if (regs.len > reglen)
1634 regs.len = reglen;
1635
1636 regbuf = vzalloc(reglen);
1637 if (!regbuf)
1638 return -ENOMEM;
1639
1640 if (regs.len < reglen)
1641 reglen = regs.len;
1642
1643 ops->get_regs(dev, ®s, regbuf);
1644
1645 ret = -EFAULT;
1646 if (copy_to_user(useraddr, ®s, sizeof(regs)))
1647 goto out;
1648 useraddr += offsetof(struct ethtool_regs, data);
1649 if (copy_to_user(useraddr, regbuf, reglen))
1650 goto out;
1651 ret = 0;
1652
1653 out:
1654 vfree(regbuf);
1655 return ret;
1656}
1657
1658static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1659{
1660 struct ethtool_value reset;
1661 int ret;
1662
1663 if (!dev->ethtool_ops->reset)
1664 return -EOPNOTSUPP;
1665
1666 if (dev->ethtool->module_fw_flash_in_progress)
1667 return -EBUSY;
1668
1669 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1670 return -EFAULT;
1671
1672 ret = dev->ethtool_ops->reset(dev, &reset.data);
1673 if (ret)
1674 return ret;
1675
1676 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1677 return -EFAULT;
1678 return 0;
1679}
1680
1681static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1682{
1683 struct ethtool_wolinfo wol;
1684
1685 if (!dev->ethtool_ops->get_wol)
1686 return -EOPNOTSUPP;
1687
1688 memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1689 wol.cmd = ETHTOOL_GWOL;
1690 dev->ethtool_ops->get_wol(dev, &wol);
1691
1692 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1693 return -EFAULT;
1694 return 0;
1695}
1696
1697static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1698{
1699 struct ethtool_wolinfo wol, cur_wol;
1700 int ret;
1701
1702 if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol)
1703 return -EOPNOTSUPP;
1704
1705 memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo));
1706 cur_wol.cmd = ETHTOOL_GWOL;
1707 dev->ethtool_ops->get_wol(dev, &cur_wol);
1708
1709 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1710 return -EFAULT;
1711
1712 if (wol.wolopts & ~cur_wol.supported)
1713 return -EINVAL;
1714
1715 if (wol.wolopts == cur_wol.wolopts &&
1716 !memcmp(wol.sopass, cur_wol.sopass, sizeof(wol.sopass)))
1717 return 0;
1718
1719 ret = dev->ethtool_ops->set_wol(dev, &wol);
1720 if (ret)
1721 return ret;
1722
1723 dev->ethtool->wol_enabled = !!wol.wolopts;
1724 ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1725
1726 return 0;
1727}
1728
1729static void eee_to_keee(struct ethtool_keee *keee,
1730 const struct ethtool_eee *eee)
1731{
1732 memset(keee, 0, sizeof(*keee));
1733
1734 keee->eee_enabled = eee->eee_enabled;
1735 keee->tx_lpi_enabled = eee->tx_lpi_enabled;
1736 keee->tx_lpi_timer = eee->tx_lpi_timer;
1737
1738 ethtool_convert_legacy_u32_to_link_mode(keee->advertised,
1739 eee->advertised);
1740}
1741
1742static void keee_to_eee(struct ethtool_eee *eee,
1743 const struct ethtool_keee *keee)
1744{
1745 bool overflow;
1746
1747 memset(eee, 0, sizeof(*eee));
1748
1749 eee->eee_active = keee->eee_active;
1750 eee->eee_enabled = keee->eee_enabled;
1751 eee->tx_lpi_enabled = keee->tx_lpi_enabled;
1752 eee->tx_lpi_timer = keee->tx_lpi_timer;
1753
1754 overflow = !ethtool_convert_link_mode_to_legacy_u32(&eee->supported,
1755 keee->supported);
1756 ethtool_convert_link_mode_to_legacy_u32(&eee->advertised,
1757 keee->advertised);
1758 ethtool_convert_link_mode_to_legacy_u32(&eee->lp_advertised,
1759 keee->lp_advertised);
1760 if (overflow)
1761 pr_warn("Ethtool ioctl interface doesn't support passing EEE linkmodes beyond bit 32\n");
1762}
1763
1764static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1765{
1766 struct ethtool_keee keee;
1767 struct ethtool_eee eee;
1768 int rc;
1769
1770 if (!dev->ethtool_ops->get_eee)
1771 return -EOPNOTSUPP;
1772
1773 memset(&keee, 0, sizeof(keee));
1774 rc = dev->ethtool_ops->get_eee(dev, &keee);
1775 if (rc)
1776 return rc;
1777
1778 keee_to_eee(&eee, &keee);
1779 if (copy_to_user(useraddr, &eee, sizeof(eee)))
1780 return -EFAULT;
1781
1782 return 0;
1783}
1784
1785static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1786{
1787 struct ethtool_keee keee;
1788 struct ethtool_eee eee;
1789 int ret;
1790
1791 if (!dev->ethtool_ops->set_eee)
1792 return -EOPNOTSUPP;
1793
1794 if (copy_from_user(&eee, useraddr, sizeof(eee)))
1795 return -EFAULT;
1796
1797 eee_to_keee(&keee, &eee);
1798 ret = dev->ethtool_ops->set_eee(dev, &keee);
1799 if (!ret)
1800 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1801 return ret;
1802}
1803
1804static int ethtool_nway_reset(struct net_device *dev)
1805{
1806 if (!dev->ethtool_ops->nway_reset)
1807 return -EOPNOTSUPP;
1808
1809 return dev->ethtool_ops->nway_reset(dev);
1810}
1811
1812static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1813{
1814 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1815 int link = __ethtool_get_link(dev);
1816
1817 if (link < 0)
1818 return link;
1819
1820 edata.data = link;
1821 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1822 return -EFAULT;
1823 return 0;
1824}
1825
1826static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1827 int (*getter)(struct net_device *,
1828 struct ethtool_eeprom *, u8 *),
1829 u32 total_len)
1830{
1831 struct ethtool_eeprom eeprom;
1832 void __user *userbuf = useraddr + sizeof(eeprom);
1833 u32 bytes_remaining;
1834 u8 *data;
1835 int ret = 0;
1836
1837 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1838 return -EFAULT;
1839
1840 /* Check for wrap and zero */
1841 if (eeprom.offset + eeprom.len <= eeprom.offset)
1842 return -EINVAL;
1843
1844 /* Check for exceeding total eeprom len */
1845 if (eeprom.offset + eeprom.len > total_len)
1846 return -EINVAL;
1847
1848 data = kzalloc(PAGE_SIZE, GFP_USER);
1849 if (!data)
1850 return -ENOMEM;
1851
1852 bytes_remaining = eeprom.len;
1853 while (bytes_remaining > 0) {
1854 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1855
1856 ret = getter(dev, &eeprom, data);
1857 if (ret)
1858 break;
1859 if (!eeprom.len) {
1860 ret = -EIO;
1861 break;
1862 }
1863 if (copy_to_user(userbuf, data, eeprom.len)) {
1864 ret = -EFAULT;
1865 break;
1866 }
1867 userbuf += eeprom.len;
1868 eeprom.offset += eeprom.len;
1869 bytes_remaining -= eeprom.len;
1870 }
1871
1872 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1873 eeprom.offset -= eeprom.len;
1874 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1875 ret = -EFAULT;
1876
1877 kfree(data);
1878 return ret;
1879}
1880
1881static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1882{
1883 const struct ethtool_ops *ops = dev->ethtool_ops;
1884
1885 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1886 !ops->get_eeprom_len(dev))
1887 return -EOPNOTSUPP;
1888
1889 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1890 ops->get_eeprom_len(dev));
1891}
1892
1893static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1894{
1895 struct ethtool_eeprom eeprom;
1896 const struct ethtool_ops *ops = dev->ethtool_ops;
1897 void __user *userbuf = useraddr + sizeof(eeprom);
1898 u32 bytes_remaining;
1899 u8 *data;
1900 int ret = 0;
1901
1902 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1903 !ops->get_eeprom_len(dev))
1904 return -EOPNOTSUPP;
1905
1906 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1907 return -EFAULT;
1908
1909 /* Check for wrap and zero */
1910 if (eeprom.offset + eeprom.len <= eeprom.offset)
1911 return -EINVAL;
1912
1913 /* Check for exceeding total eeprom len */
1914 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1915 return -EINVAL;
1916
1917 data = kzalloc(PAGE_SIZE, GFP_USER);
1918 if (!data)
1919 return -ENOMEM;
1920
1921 bytes_remaining = eeprom.len;
1922 while (bytes_remaining > 0) {
1923 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1924
1925 if (copy_from_user(data, userbuf, eeprom.len)) {
1926 ret = -EFAULT;
1927 break;
1928 }
1929 ret = ops->set_eeprom(dev, &eeprom, data);
1930 if (ret)
1931 break;
1932 userbuf += eeprom.len;
1933 eeprom.offset += eeprom.len;
1934 bytes_remaining -= eeprom.len;
1935 }
1936
1937 kfree(data);
1938 return ret;
1939}
1940
1941static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1942 void __user *useraddr)
1943{
1944 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1945 struct kernel_ethtool_coalesce kernel_coalesce = {};
1946 int ret;
1947
1948 if (!dev->ethtool_ops->get_coalesce)
1949 return -EOPNOTSUPP;
1950
1951 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1952 NULL);
1953 if (ret)
1954 return ret;
1955
1956 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1957 return -EFAULT;
1958 return 0;
1959}
1960
1961static bool
1962ethtool_set_coalesce_supported(struct net_device *dev,
1963 struct ethtool_coalesce *coalesce)
1964{
1965 u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1966 u32 nonzero_params = 0;
1967
1968 if (coalesce->rx_coalesce_usecs)
1969 nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1970 if (coalesce->rx_max_coalesced_frames)
1971 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1972 if (coalesce->rx_coalesce_usecs_irq)
1973 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1974 if (coalesce->rx_max_coalesced_frames_irq)
1975 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1976 if (coalesce->tx_coalesce_usecs)
1977 nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1978 if (coalesce->tx_max_coalesced_frames)
1979 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1980 if (coalesce->tx_coalesce_usecs_irq)
1981 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1982 if (coalesce->tx_max_coalesced_frames_irq)
1983 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1984 if (coalesce->stats_block_coalesce_usecs)
1985 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1986 if (coalesce->use_adaptive_rx_coalesce)
1987 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1988 if (coalesce->use_adaptive_tx_coalesce)
1989 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1990 if (coalesce->pkt_rate_low)
1991 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1992 if (coalesce->rx_coalesce_usecs_low)
1993 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1994 if (coalesce->rx_max_coalesced_frames_low)
1995 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1996 if (coalesce->tx_coalesce_usecs_low)
1997 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1998 if (coalesce->tx_max_coalesced_frames_low)
1999 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
2000 if (coalesce->pkt_rate_high)
2001 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
2002 if (coalesce->rx_coalesce_usecs_high)
2003 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
2004 if (coalesce->rx_max_coalesced_frames_high)
2005 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
2006 if (coalesce->tx_coalesce_usecs_high)
2007 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
2008 if (coalesce->tx_max_coalesced_frames_high)
2009 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
2010 if (coalesce->rate_sample_interval)
2011 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
2012
2013 return (supported_params & nonzero_params) == nonzero_params;
2014}
2015
2016static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
2017 void __user *useraddr)
2018{
2019 struct kernel_ethtool_coalesce kernel_coalesce = {};
2020 struct ethtool_coalesce coalesce;
2021 int ret;
2022
2023 if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce)
2024 return -EOPNOTSUPP;
2025
2026 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
2027 NULL);
2028 if (ret)
2029 return ret;
2030
2031 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
2032 return -EFAULT;
2033
2034 if (!ethtool_set_coalesce_supported(dev, &coalesce))
2035 return -EOPNOTSUPP;
2036
2037 ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
2038 NULL);
2039 if (!ret)
2040 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
2041 return ret;
2042}
2043
2044static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
2045{
2046 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
2047 struct kernel_ethtool_ringparam kernel_ringparam = {};
2048
2049 if (!dev->ethtool_ops->get_ringparam)
2050 return -EOPNOTSUPP;
2051
2052 dev->ethtool_ops->get_ringparam(dev, &ringparam,
2053 &kernel_ringparam, NULL);
2054
2055 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
2056 return -EFAULT;
2057 return 0;
2058}
2059
2060static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
2061{
2062 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
2063 struct kernel_ethtool_ringparam kernel_ringparam;
2064 int ret;
2065
2066 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
2067 return -EOPNOTSUPP;
2068
2069 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
2070 return -EFAULT;
2071
2072 dev->ethtool_ops->get_ringparam(dev, &max, &kernel_ringparam, NULL);
2073
2074 /* ensure new ring parameters are within the maximums */
2075 if (ringparam.rx_pending > max.rx_max_pending ||
2076 ringparam.rx_mini_pending > max.rx_mini_max_pending ||
2077 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
2078 ringparam.tx_pending > max.tx_max_pending)
2079 return -EINVAL;
2080
2081 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
2082 &kernel_ringparam, NULL);
2083 if (!ret)
2084 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
2085 return ret;
2086}
2087
2088static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
2089 void __user *useraddr)
2090{
2091 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
2092
2093 if (!dev->ethtool_ops->get_channels)
2094 return -EOPNOTSUPP;
2095
2096 dev->ethtool_ops->get_channels(dev, &channels);
2097
2098 if (copy_to_user(useraddr, &channels, sizeof(channels)))
2099 return -EFAULT;
2100 return 0;
2101}
2102
2103static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
2104 void __user *useraddr)
2105{
2106 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
2107 u16 from_channel, to_channel;
2108 unsigned int i;
2109 int ret;
2110
2111 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
2112 return -EOPNOTSUPP;
2113
2114 if (copy_from_user(&channels, useraddr, sizeof(channels)))
2115 return -EFAULT;
2116
2117 dev->ethtool_ops->get_channels(dev, &curr);
2118
2119 if (channels.rx_count == curr.rx_count &&
2120 channels.tx_count == curr.tx_count &&
2121 channels.combined_count == curr.combined_count &&
2122 channels.other_count == curr.other_count)
2123 return 0;
2124
2125 /* ensure new counts are within the maximums */
2126 if (channels.rx_count > curr.max_rx ||
2127 channels.tx_count > curr.max_tx ||
2128 channels.combined_count > curr.max_combined ||
2129 channels.other_count > curr.max_other)
2130 return -EINVAL;
2131
2132 /* ensure there is at least one RX and one TX channel */
2133 if (!channels.combined_count &&
2134 (!channels.rx_count || !channels.tx_count))
2135 return -EINVAL;
2136
2137 ret = ethtool_check_max_channel(dev, channels, NULL);
2138 if (ret)
2139 return ret;
2140
2141 /* Disabling channels, query zero-copy AF_XDP sockets */
2142 from_channel = channels.combined_count +
2143 min(channels.rx_count, channels.tx_count);
2144 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
2145 for (i = from_channel; i < to_channel; i++)
2146 if (xsk_get_pool_from_qid(dev, i))
2147 return -EINVAL;
2148
2149 ret = dev->ethtool_ops->set_channels(dev, &channels);
2150 if (!ret)
2151 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
2152 return ret;
2153}
2154
2155static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
2156{
2157 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
2158
2159 if (!dev->ethtool_ops->get_pauseparam)
2160 return -EOPNOTSUPP;
2161
2162 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
2163
2164 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
2165 return -EFAULT;
2166 return 0;
2167}
2168
2169static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
2170{
2171 struct ethtool_pauseparam pauseparam;
2172 int ret;
2173
2174 if (!dev->ethtool_ops->set_pauseparam)
2175 return -EOPNOTSUPP;
2176
2177 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
2178 return -EFAULT;
2179
2180 ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
2181 if (!ret)
2182 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
2183 return ret;
2184}
2185
2186static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
2187{
2188 struct ethtool_test test;
2189 const struct ethtool_ops *ops = dev->ethtool_ops;
2190 u64 *data;
2191 int ret, test_len;
2192
2193 if (!ops->self_test || !ops->get_sset_count)
2194 return -EOPNOTSUPP;
2195
2196 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
2197 if (test_len < 0)
2198 return test_len;
2199 WARN_ON(test_len == 0);
2200
2201 if (copy_from_user(&test, useraddr, sizeof(test)))
2202 return -EFAULT;
2203
2204 test.len = test_len;
2205 data = kcalloc(test_len, sizeof(u64), GFP_USER);
2206 if (!data)
2207 return -ENOMEM;
2208
2209 netif_testing_on(dev);
2210 ops->self_test(dev, &test, data);
2211 netif_testing_off(dev);
2212
2213 ret = -EFAULT;
2214 if (copy_to_user(useraddr, &test, sizeof(test)))
2215 goto out;
2216 useraddr += sizeof(test);
2217 if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64))))
2218 goto out;
2219 ret = 0;
2220
2221 out:
2222 kfree(data);
2223 return ret;
2224}
2225
2226static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
2227{
2228 struct ethtool_gstrings gstrings;
2229 u8 *data;
2230 int ret;
2231
2232 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
2233 return -EFAULT;
2234
2235 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
2236 if (ret < 0)
2237 return ret;
2238 if (ret > S32_MAX / ETH_GSTRING_LEN)
2239 return -ENOMEM;
2240 WARN_ON_ONCE(!ret);
2241
2242 gstrings.len = ret;
2243
2244 if (gstrings.len) {
2245 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
2246 if (!data)
2247 return -ENOMEM;
2248
2249 __ethtool_get_strings(dev, gstrings.string_set, data);
2250 } else {
2251 data = NULL;
2252 }
2253
2254 ret = -EFAULT;
2255 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
2256 goto out;
2257 useraddr += sizeof(gstrings);
2258 if (gstrings.len &&
2259 copy_to_user(useraddr, data,
2260 array_size(gstrings.len, ETH_GSTRING_LEN)))
2261 goto out;
2262 ret = 0;
2263
2264out:
2265 vfree(data);
2266 return ret;
2267}
2268
2269__printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
2270{
2271 va_list args;
2272
2273 va_start(args, fmt);
2274 vsnprintf(*data, ETH_GSTRING_LEN, fmt, args);
2275 va_end(args);
2276
2277 *data += ETH_GSTRING_LEN;
2278}
2279EXPORT_SYMBOL(ethtool_sprintf);
2280
2281void ethtool_puts(u8 **data, const char *str)
2282{
2283 strscpy(*data, str, ETH_GSTRING_LEN);
2284 *data += ETH_GSTRING_LEN;
2285}
2286EXPORT_SYMBOL(ethtool_puts);
2287
2288static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
2289{
2290 struct ethtool_value id;
2291 static bool busy;
2292 const struct ethtool_ops *ops = dev->ethtool_ops;
2293 netdevice_tracker dev_tracker;
2294 int rc;
2295
2296 if (!ops->set_phys_id)
2297 return -EOPNOTSUPP;
2298
2299 if (busy)
2300 return -EBUSY;
2301
2302 if (copy_from_user(&id, useraddr, sizeof(id)))
2303 return -EFAULT;
2304
2305 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
2306 if (rc < 0)
2307 return rc;
2308
2309 /* Drop the RTNL lock while waiting, but prevent reentry or
2310 * removal of the device.
2311 */
2312 busy = true;
2313 netdev_hold(dev, &dev_tracker, GFP_KERNEL);
2314 rtnl_unlock();
2315
2316 if (rc == 0) {
2317 /* Driver will handle this itself */
2318 schedule_timeout_interruptible(
2319 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
2320 } else {
2321 /* Driver expects to be called at twice the frequency in rc */
2322 int n = rc * 2, interval = HZ / n;
2323 u64 count = mul_u32_u32(n, id.data);
2324 u64 i = 0;
2325
2326 do {
2327 rtnl_lock();
2328 rc = ops->set_phys_id(dev,
2329 (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
2330 rtnl_unlock();
2331 if (rc)
2332 break;
2333 schedule_timeout_interruptible(interval);
2334 } while (!signal_pending(current) && (!id.data || i < count));
2335 }
2336
2337 rtnl_lock();
2338 netdev_put(dev, &dev_tracker);
2339 busy = false;
2340
2341 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
2342 return rc;
2343}
2344
2345static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
2346{
2347 struct ethtool_stats stats;
2348 const struct ethtool_ops *ops = dev->ethtool_ops;
2349 u64 *data;
2350 int ret, n_stats;
2351
2352 if (!ops->get_ethtool_stats || !ops->get_sset_count)
2353 return -EOPNOTSUPP;
2354
2355 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
2356 if (n_stats < 0)
2357 return n_stats;
2358 if (n_stats > S32_MAX / sizeof(u64))
2359 return -ENOMEM;
2360 WARN_ON_ONCE(!n_stats);
2361 if (copy_from_user(&stats, useraddr, sizeof(stats)))
2362 return -EFAULT;
2363
2364 stats.n_stats = n_stats;
2365
2366 if (n_stats) {
2367 data = vzalloc(array_size(n_stats, sizeof(u64)));
2368 if (!data)
2369 return -ENOMEM;
2370 ops->get_ethtool_stats(dev, &stats, data);
2371 } else {
2372 data = NULL;
2373 }
2374
2375 ret = -EFAULT;
2376 if (copy_to_user(useraddr, &stats, sizeof(stats)))
2377 goto out;
2378 useraddr += sizeof(stats);
2379 if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2380 goto out;
2381 ret = 0;
2382
2383 out:
2384 vfree(data);
2385 return ret;
2386}
2387
2388static int ethtool_vzalloc_stats_array(int n_stats, u64 **data)
2389{
2390 if (n_stats < 0)
2391 return n_stats;
2392 if (n_stats > S32_MAX / sizeof(u64))
2393 return -ENOMEM;
2394 if (WARN_ON_ONCE(!n_stats))
2395 return -EOPNOTSUPP;
2396
2397 *data = vzalloc(array_size(n_stats, sizeof(u64)));
2398 if (!*data)
2399 return -ENOMEM;
2400
2401 return 0;
2402}
2403
2404static int ethtool_get_phy_stats_phydev(struct phy_device *phydev,
2405 struct ethtool_stats *stats,
2406 u64 **data)
2407 {
2408 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
2409 int n_stats, ret;
2410
2411 if (!phy_ops || !phy_ops->get_sset_count || !phy_ops->get_stats)
2412 return -EOPNOTSUPP;
2413
2414 n_stats = phy_ops->get_sset_count(phydev);
2415
2416 ret = ethtool_vzalloc_stats_array(n_stats, data);
2417 if (ret)
2418 return ret;
2419
2420 stats->n_stats = n_stats;
2421 return phy_ops->get_stats(phydev, stats, *data);
2422}
2423
2424static int ethtool_get_phy_stats_ethtool(struct net_device *dev,
2425 struct ethtool_stats *stats,
2426 u64 **data)
2427{
2428 const struct ethtool_ops *ops = dev->ethtool_ops;
2429 int n_stats, ret;
2430
2431 if (!ops || !ops->get_sset_count || !ops->get_ethtool_phy_stats)
2432 return -EOPNOTSUPP;
2433
2434 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
2435
2436 ret = ethtool_vzalloc_stats_array(n_stats, data);
2437 if (ret)
2438 return ret;
2439
2440 stats->n_stats = n_stats;
2441 ops->get_ethtool_phy_stats(dev, stats, *data);
2442
2443 return 0;
2444}
2445
2446static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2447{
2448 struct phy_device *phydev = dev->phydev;
2449 struct ethtool_stats stats;
2450 u64 *data = NULL;
2451 int ret = -EOPNOTSUPP;
2452
2453 if (copy_from_user(&stats, useraddr, sizeof(stats)))
2454 return -EFAULT;
2455
2456 if (phydev)
2457 ret = ethtool_get_phy_stats_phydev(phydev, &stats, &data);
2458
2459 if (ret == -EOPNOTSUPP)
2460 ret = ethtool_get_phy_stats_ethtool(dev, &stats, &data);
2461
2462 if (ret)
2463 goto out;
2464
2465 if (copy_to_user(useraddr, &stats, sizeof(stats))) {
2466 ret = -EFAULT;
2467 goto out;
2468 }
2469
2470 useraddr += sizeof(stats);
2471 if (copy_to_user(useraddr, data, array_size(stats.n_stats, sizeof(u64))))
2472 ret = -EFAULT;
2473
2474 out:
2475 vfree(data);
2476 return ret;
2477}
2478
2479static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2480{
2481 struct ethtool_perm_addr epaddr;
2482
2483 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2484 return -EFAULT;
2485
2486 if (epaddr.size < dev->addr_len)
2487 return -ETOOSMALL;
2488 epaddr.size = dev->addr_len;
2489
2490 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2491 return -EFAULT;
2492 useraddr += sizeof(epaddr);
2493 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2494 return -EFAULT;
2495 return 0;
2496}
2497
2498static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2499 u32 cmd, u32 (*actor)(struct net_device *))
2500{
2501 struct ethtool_value edata = { .cmd = cmd };
2502
2503 if (!actor)
2504 return -EOPNOTSUPP;
2505
2506 edata.data = actor(dev);
2507
2508 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2509 return -EFAULT;
2510 return 0;
2511}
2512
2513static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2514 void (*actor)(struct net_device *, u32))
2515{
2516 struct ethtool_value edata;
2517
2518 if (!actor)
2519 return -EOPNOTSUPP;
2520
2521 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2522 return -EFAULT;
2523
2524 actor(dev, edata.data);
2525 return 0;
2526}
2527
2528static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2529 int (*actor)(struct net_device *, u32))
2530{
2531 struct ethtool_value edata;
2532
2533 if (!actor)
2534 return -EOPNOTSUPP;
2535
2536 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2537 return -EFAULT;
2538
2539 return actor(dev, edata.data);
2540}
2541
2542static int
2543ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req)
2544{
2545 if (!dev->ethtool_ops->flash_device) {
2546 req->devlink = netdev_to_devlink_get(dev);
2547 return 0;
2548 }
2549
2550 return dev->ethtool_ops->flash_device(dev, &req->efl);
2551}
2552
2553static int ethtool_set_dump(struct net_device *dev,
2554 void __user *useraddr)
2555{
2556 struct ethtool_dump dump;
2557
2558 if (!dev->ethtool_ops->set_dump)
2559 return -EOPNOTSUPP;
2560
2561 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2562 return -EFAULT;
2563
2564 return dev->ethtool_ops->set_dump(dev, &dump);
2565}
2566
2567static int ethtool_get_dump_flag(struct net_device *dev,
2568 void __user *useraddr)
2569{
2570 int ret;
2571 struct ethtool_dump dump;
2572 const struct ethtool_ops *ops = dev->ethtool_ops;
2573
2574 if (!ops->get_dump_flag)
2575 return -EOPNOTSUPP;
2576
2577 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2578 return -EFAULT;
2579
2580 ret = ops->get_dump_flag(dev, &dump);
2581 if (ret)
2582 return ret;
2583
2584 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2585 return -EFAULT;
2586 return 0;
2587}
2588
2589static int ethtool_get_dump_data(struct net_device *dev,
2590 void __user *useraddr)
2591{
2592 int ret;
2593 __u32 len;
2594 struct ethtool_dump dump, tmp;
2595 const struct ethtool_ops *ops = dev->ethtool_ops;
2596 void *data = NULL;
2597
2598 if (!ops->get_dump_data || !ops->get_dump_flag)
2599 return -EOPNOTSUPP;
2600
2601 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2602 return -EFAULT;
2603
2604 memset(&tmp, 0, sizeof(tmp));
2605 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2606 ret = ops->get_dump_flag(dev, &tmp);
2607 if (ret)
2608 return ret;
2609
2610 len = min(tmp.len, dump.len);
2611 if (!len)
2612 return -EFAULT;
2613
2614 /* Don't ever let the driver think there's more space available
2615 * than it requested with .get_dump_flag().
2616 */
2617 dump.len = len;
2618
2619 /* Always allocate enough space to hold the whole thing so that the
2620 * driver does not need to check the length and bother with partial
2621 * dumping.
2622 */
2623 data = vzalloc(tmp.len);
2624 if (!data)
2625 return -ENOMEM;
2626 ret = ops->get_dump_data(dev, &dump, data);
2627 if (ret)
2628 goto out;
2629
2630 /* There are two sane possibilities:
2631 * 1. The driver's .get_dump_data() does not touch dump.len.
2632 * 2. Or it may set dump.len to how much it really writes, which
2633 * should be tmp.len (or len if it can do a partial dump).
2634 * In any case respond to userspace with the actual length of data
2635 * it's receiving.
2636 */
2637 WARN_ON(dump.len != len && dump.len != tmp.len);
2638 dump.len = len;
2639
2640 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2641 ret = -EFAULT;
2642 goto out;
2643 }
2644 useraddr += offsetof(struct ethtool_dump, data);
2645 if (copy_to_user(useraddr, data, len))
2646 ret = -EFAULT;
2647out:
2648 vfree(data);
2649 return ret;
2650}
2651
2652static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2653{
2654 struct kernel_ethtool_ts_info kernel_info;
2655 struct ethtool_ts_info info = {};
2656 int err;
2657
2658 err = __ethtool_get_ts_info(dev, &kernel_info);
2659 if (err)
2660 return err;
2661
2662 info.cmd = kernel_info.cmd;
2663 info.so_timestamping = kernel_info.so_timestamping;
2664 info.phc_index = kernel_info.phc_index;
2665 info.tx_types = kernel_info.tx_types;
2666 info.rx_filters = kernel_info.rx_filters;
2667
2668 if (copy_to_user(useraddr, &info, sizeof(info)))
2669 return -EFAULT;
2670
2671 return 0;
2672}
2673
2674int ethtool_get_module_info_call(struct net_device *dev,
2675 struct ethtool_modinfo *modinfo)
2676{
2677 const struct ethtool_ops *ops = dev->ethtool_ops;
2678 struct phy_device *phydev = dev->phydev;
2679
2680 if (dev->ethtool->module_fw_flash_in_progress)
2681 return -EBUSY;
2682
2683 if (dev->sfp_bus)
2684 return sfp_get_module_info(dev->sfp_bus, modinfo);
2685
2686 if (phydev && phydev->drv && phydev->drv->module_info)
2687 return phydev->drv->module_info(phydev, modinfo);
2688
2689 if (ops->get_module_info)
2690 return ops->get_module_info(dev, modinfo);
2691
2692 return -EOPNOTSUPP;
2693}
2694
2695static int ethtool_get_module_info(struct net_device *dev,
2696 void __user *useraddr)
2697{
2698 int ret;
2699 struct ethtool_modinfo modinfo;
2700
2701 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2702 return -EFAULT;
2703
2704 ret = ethtool_get_module_info_call(dev, &modinfo);
2705 if (ret)
2706 return ret;
2707
2708 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2709 return -EFAULT;
2710
2711 return 0;
2712}
2713
2714int ethtool_get_module_eeprom_call(struct net_device *dev,
2715 struct ethtool_eeprom *ee, u8 *data)
2716{
2717 const struct ethtool_ops *ops = dev->ethtool_ops;
2718 struct phy_device *phydev = dev->phydev;
2719
2720 if (dev->ethtool->module_fw_flash_in_progress)
2721 return -EBUSY;
2722
2723 if (dev->sfp_bus)
2724 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2725
2726 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2727 return phydev->drv->module_eeprom(phydev, ee, data);
2728
2729 if (ops->get_module_eeprom)
2730 return ops->get_module_eeprom(dev, ee, data);
2731
2732 return -EOPNOTSUPP;
2733}
2734
2735static int ethtool_get_module_eeprom(struct net_device *dev,
2736 void __user *useraddr)
2737{
2738 int ret;
2739 struct ethtool_modinfo modinfo;
2740
2741 ret = ethtool_get_module_info_call(dev, &modinfo);
2742 if (ret)
2743 return ret;
2744
2745 return ethtool_get_any_eeprom(dev, useraddr,
2746 ethtool_get_module_eeprom_call,
2747 modinfo.eeprom_len);
2748}
2749
2750static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2751{
2752 switch (tuna->id) {
2753 case ETHTOOL_RX_COPYBREAK:
2754 case ETHTOOL_TX_COPYBREAK:
2755 case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
2756 if (tuna->len != sizeof(u32) ||
2757 tuna->type_id != ETHTOOL_TUNABLE_U32)
2758 return -EINVAL;
2759 break;
2760 case ETHTOOL_PFC_PREVENTION_TOUT:
2761 if (tuna->len != sizeof(u16) ||
2762 tuna->type_id != ETHTOOL_TUNABLE_U16)
2763 return -EINVAL;
2764 break;
2765 default:
2766 return -EINVAL;
2767 }
2768
2769 return 0;
2770}
2771
2772static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2773{
2774 int ret;
2775 struct ethtool_tunable tuna;
2776 const struct ethtool_ops *ops = dev->ethtool_ops;
2777 void *data;
2778
2779 if (!ops->get_tunable)
2780 return -EOPNOTSUPP;
2781 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2782 return -EFAULT;
2783 ret = ethtool_tunable_valid(&tuna);
2784 if (ret)
2785 return ret;
2786 data = kzalloc(tuna.len, GFP_USER);
2787 if (!data)
2788 return -ENOMEM;
2789 ret = ops->get_tunable(dev, &tuna, data);
2790 if (ret)
2791 goto out;
2792 useraddr += sizeof(tuna);
2793 ret = -EFAULT;
2794 if (copy_to_user(useraddr, data, tuna.len))
2795 goto out;
2796 ret = 0;
2797
2798out:
2799 kfree(data);
2800 return ret;
2801}
2802
2803static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2804{
2805 int ret;
2806 struct ethtool_tunable tuna;
2807 const struct ethtool_ops *ops = dev->ethtool_ops;
2808 void *data;
2809
2810 if (!ops->set_tunable)
2811 return -EOPNOTSUPP;
2812 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2813 return -EFAULT;
2814 ret = ethtool_tunable_valid(&tuna);
2815 if (ret)
2816 return ret;
2817 useraddr += sizeof(tuna);
2818 data = memdup_user(useraddr, tuna.len);
2819 if (IS_ERR(data))
2820 return PTR_ERR(data);
2821 ret = ops->set_tunable(dev, &tuna, data);
2822
2823 kfree(data);
2824 return ret;
2825}
2826
2827static noinline_for_stack int
2828ethtool_get_per_queue_coalesce(struct net_device *dev,
2829 void __user *useraddr,
2830 struct ethtool_per_queue_op *per_queue_opt)
2831{
2832 u32 bit;
2833 int ret;
2834 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2835
2836 if (!dev->ethtool_ops->get_per_queue_coalesce)
2837 return -EOPNOTSUPP;
2838
2839 useraddr += sizeof(*per_queue_opt);
2840
2841 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2842 MAX_NUM_QUEUE);
2843
2844 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2845 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2846
2847 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2848 if (ret != 0)
2849 return ret;
2850 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2851 return -EFAULT;
2852 useraddr += sizeof(coalesce);
2853 }
2854
2855 return 0;
2856}
2857
2858static noinline_for_stack int
2859ethtool_set_per_queue_coalesce(struct net_device *dev,
2860 void __user *useraddr,
2861 struct ethtool_per_queue_op *per_queue_opt)
2862{
2863 u32 bit;
2864 int i, ret = 0;
2865 int n_queue;
2866 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2867 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2868
2869 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2870 (!dev->ethtool_ops->get_per_queue_coalesce))
2871 return -EOPNOTSUPP;
2872
2873 useraddr += sizeof(*per_queue_opt);
2874
2875 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2876 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2877 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2878 if (!backup)
2879 return -ENOMEM;
2880
2881 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2882 struct ethtool_coalesce coalesce;
2883
2884 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2885 if (ret != 0)
2886 goto roll_back;
2887
2888 tmp++;
2889
2890 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2891 ret = -EFAULT;
2892 goto roll_back;
2893 }
2894
2895 if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2896 ret = -EOPNOTSUPP;
2897 goto roll_back;
2898 }
2899
2900 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2901 if (ret != 0)
2902 goto roll_back;
2903
2904 useraddr += sizeof(coalesce);
2905 }
2906
2907roll_back:
2908 if (ret != 0) {
2909 tmp = backup;
2910 for_each_set_bit(i, queue_mask, bit) {
2911 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2912 tmp++;
2913 }
2914 }
2915 kfree(backup);
2916
2917 return ret;
2918}
2919
2920static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2921 void __user *useraddr, u32 sub_cmd)
2922{
2923 struct ethtool_per_queue_op per_queue_opt;
2924
2925 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2926 return -EFAULT;
2927
2928 if (per_queue_opt.sub_command != sub_cmd)
2929 return -EINVAL;
2930
2931 switch (per_queue_opt.sub_command) {
2932 case ETHTOOL_GCOALESCE:
2933 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2934 case ETHTOOL_SCOALESCE:
2935 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2936 default:
2937 return -EOPNOTSUPP;
2938 }
2939}
2940
2941static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2942{
2943 switch (tuna->id) {
2944 case ETHTOOL_PHY_DOWNSHIFT:
2945 case ETHTOOL_PHY_FAST_LINK_DOWN:
2946 if (tuna->len != sizeof(u8) ||
2947 tuna->type_id != ETHTOOL_TUNABLE_U8)
2948 return -EINVAL;
2949 break;
2950 case ETHTOOL_PHY_EDPD:
2951 if (tuna->len != sizeof(u16) ||
2952 tuna->type_id != ETHTOOL_TUNABLE_U16)
2953 return -EINVAL;
2954 break;
2955 default:
2956 return -EINVAL;
2957 }
2958
2959 return 0;
2960}
2961
2962static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2963{
2964 struct phy_device *phydev = dev->phydev;
2965 struct ethtool_tunable tuna;
2966 bool phy_drv_tunable;
2967 void *data;
2968 int ret;
2969
2970 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2971 if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
2972 return -EOPNOTSUPP;
2973 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2974 return -EFAULT;
2975 ret = ethtool_phy_tunable_valid(&tuna);
2976 if (ret)
2977 return ret;
2978 data = kzalloc(tuna.len, GFP_USER);
2979 if (!data)
2980 return -ENOMEM;
2981 if (phy_drv_tunable) {
2982 mutex_lock(&phydev->lock);
2983 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2984 mutex_unlock(&phydev->lock);
2985 } else {
2986 ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
2987 }
2988 if (ret)
2989 goto out;
2990 useraddr += sizeof(tuna);
2991 ret = -EFAULT;
2992 if (copy_to_user(useraddr, data, tuna.len))
2993 goto out;
2994 ret = 0;
2995
2996out:
2997 kfree(data);
2998 return ret;
2999}
3000
3001static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
3002{
3003 struct phy_device *phydev = dev->phydev;
3004 struct ethtool_tunable tuna;
3005 bool phy_drv_tunable;
3006 void *data;
3007 int ret;
3008
3009 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
3010 if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
3011 return -EOPNOTSUPP;
3012 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
3013 return -EFAULT;
3014 ret = ethtool_phy_tunable_valid(&tuna);
3015 if (ret)
3016 return ret;
3017 useraddr += sizeof(tuna);
3018 data = memdup_user(useraddr, tuna.len);
3019 if (IS_ERR(data))
3020 return PTR_ERR(data);
3021 if (phy_drv_tunable) {
3022 mutex_lock(&phydev->lock);
3023 ret = phydev->drv->set_tunable(phydev, &tuna, data);
3024 mutex_unlock(&phydev->lock);
3025 } else {
3026 ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
3027 }
3028
3029 kfree(data);
3030 return ret;
3031}
3032
3033static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
3034{
3035 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
3036 int rc;
3037
3038 if (!dev->ethtool_ops->get_fecparam)
3039 return -EOPNOTSUPP;
3040
3041 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
3042 if (rc)
3043 return rc;
3044
3045 if (WARN_ON_ONCE(fecparam.reserved))
3046 fecparam.reserved = 0;
3047
3048 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
3049 return -EFAULT;
3050 return 0;
3051}
3052
3053static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
3054{
3055 struct ethtool_fecparam fecparam;
3056
3057 if (!dev->ethtool_ops->set_fecparam)
3058 return -EOPNOTSUPP;
3059
3060 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
3061 return -EFAULT;
3062
3063 if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE)
3064 return -EINVAL;
3065
3066 fecparam.active_fec = 0;
3067 fecparam.reserved = 0;
3068
3069 return dev->ethtool_ops->set_fecparam(dev, &fecparam);
3070}
3071
3072/* The main entry point in this file. Called from net/core/dev_ioctl.c */
3073
3074static int
3075__dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr,
3076 u32 ethcmd, struct ethtool_devlink_compat *devlink_state)
3077{
3078 struct net_device *dev;
3079 u32 sub_cmd;
3080 int rc;
3081 netdev_features_t old_features;
3082
3083 dev = __dev_get_by_name(net, ifr->ifr_name);
3084 if (!dev)
3085 return -ENODEV;
3086
3087 if (ethcmd == ETHTOOL_PERQUEUE) {
3088 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
3089 return -EFAULT;
3090 } else {
3091 sub_cmd = ethcmd;
3092 }
3093 /* Allow some commands to be done by anyone */
3094 switch (sub_cmd) {
3095 case ETHTOOL_GSET:
3096 case ETHTOOL_GDRVINFO:
3097 case ETHTOOL_GMSGLVL:
3098 case ETHTOOL_GLINK:
3099 case ETHTOOL_GCOALESCE:
3100 case ETHTOOL_GRINGPARAM:
3101 case ETHTOOL_GPAUSEPARAM:
3102 case ETHTOOL_GRXCSUM:
3103 case ETHTOOL_GTXCSUM:
3104 case ETHTOOL_GSG:
3105 case ETHTOOL_GSSET_INFO:
3106 case ETHTOOL_GSTRINGS:
3107 case ETHTOOL_GSTATS:
3108 case ETHTOOL_GPHYSTATS:
3109 case ETHTOOL_GTSO:
3110 case ETHTOOL_GPERMADDR:
3111 case ETHTOOL_GUFO:
3112 case ETHTOOL_GGSO:
3113 case ETHTOOL_GGRO:
3114 case ETHTOOL_GFLAGS:
3115 case ETHTOOL_GPFLAGS:
3116 case ETHTOOL_GRXFH:
3117 case ETHTOOL_GRXRINGS:
3118 case ETHTOOL_GRXCLSRLCNT:
3119 case ETHTOOL_GRXCLSRULE:
3120 case ETHTOOL_GRXCLSRLALL:
3121 case ETHTOOL_GRXFHINDIR:
3122 case ETHTOOL_GRSSH:
3123 case ETHTOOL_GFEATURES:
3124 case ETHTOOL_GCHANNELS:
3125 case ETHTOOL_GET_TS_INFO:
3126 case ETHTOOL_GEEE:
3127 case ETHTOOL_GTUNABLE:
3128 case ETHTOOL_PHY_GTUNABLE:
3129 case ETHTOOL_GLINKSETTINGS:
3130 case ETHTOOL_GFECPARAM:
3131 break;
3132 default:
3133 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
3134 return -EPERM;
3135 }
3136
3137 if (dev->dev.parent)
3138 pm_runtime_get_sync(dev->dev.parent);
3139
3140 if (!netif_device_present(dev)) {
3141 rc = -ENODEV;
3142 goto out;
3143 }
3144
3145 if (dev->ethtool_ops->begin) {
3146 rc = dev->ethtool_ops->begin(dev);
3147 if (rc < 0)
3148 goto out;
3149 }
3150 old_features = dev->features;
3151
3152 switch (ethcmd) {
3153 case ETHTOOL_GSET:
3154 rc = ethtool_get_settings(dev, useraddr);
3155 break;
3156 case ETHTOOL_SSET:
3157 rc = ethtool_set_settings(dev, useraddr);
3158 break;
3159 case ETHTOOL_GDRVINFO:
3160 rc = ethtool_get_drvinfo(dev, devlink_state);
3161 break;
3162 case ETHTOOL_GREGS:
3163 rc = ethtool_get_regs(dev, useraddr);
3164 break;
3165 case ETHTOOL_GWOL:
3166 rc = ethtool_get_wol(dev, useraddr);
3167 break;
3168 case ETHTOOL_SWOL:
3169 rc = ethtool_set_wol(dev, useraddr);
3170 break;
3171 case ETHTOOL_GMSGLVL:
3172 rc = ethtool_get_value(dev, useraddr, ethcmd,
3173 dev->ethtool_ops->get_msglevel);
3174 break;
3175 case ETHTOOL_SMSGLVL:
3176 rc = ethtool_set_value_void(dev, useraddr,
3177 dev->ethtool_ops->set_msglevel);
3178 if (!rc)
3179 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
3180 break;
3181 case ETHTOOL_GEEE:
3182 rc = ethtool_get_eee(dev, useraddr);
3183 break;
3184 case ETHTOOL_SEEE:
3185 rc = ethtool_set_eee(dev, useraddr);
3186 break;
3187 case ETHTOOL_NWAY_RST:
3188 rc = ethtool_nway_reset(dev);
3189 break;
3190 case ETHTOOL_GLINK:
3191 rc = ethtool_get_link(dev, useraddr);
3192 break;
3193 case ETHTOOL_GEEPROM:
3194 rc = ethtool_get_eeprom(dev, useraddr);
3195 break;
3196 case ETHTOOL_SEEPROM:
3197 rc = ethtool_set_eeprom(dev, useraddr);
3198 break;
3199 case ETHTOOL_GCOALESCE:
3200 rc = ethtool_get_coalesce(dev, useraddr);
3201 break;
3202 case ETHTOOL_SCOALESCE:
3203 rc = ethtool_set_coalesce(dev, useraddr);
3204 break;
3205 case ETHTOOL_GRINGPARAM:
3206 rc = ethtool_get_ringparam(dev, useraddr);
3207 break;
3208 case ETHTOOL_SRINGPARAM:
3209 rc = ethtool_set_ringparam(dev, useraddr);
3210 break;
3211 case ETHTOOL_GPAUSEPARAM:
3212 rc = ethtool_get_pauseparam(dev, useraddr);
3213 break;
3214 case ETHTOOL_SPAUSEPARAM:
3215 rc = ethtool_set_pauseparam(dev, useraddr);
3216 break;
3217 case ETHTOOL_TEST:
3218 rc = ethtool_self_test(dev, useraddr);
3219 break;
3220 case ETHTOOL_GSTRINGS:
3221 rc = ethtool_get_strings(dev, useraddr);
3222 break;
3223 case ETHTOOL_PHYS_ID:
3224 rc = ethtool_phys_id(dev, useraddr);
3225 break;
3226 case ETHTOOL_GSTATS:
3227 rc = ethtool_get_stats(dev, useraddr);
3228 break;
3229 case ETHTOOL_GPERMADDR:
3230 rc = ethtool_get_perm_addr(dev, useraddr);
3231 break;
3232 case ETHTOOL_GFLAGS:
3233 rc = ethtool_get_value(dev, useraddr, ethcmd,
3234 __ethtool_get_flags);
3235 break;
3236 case ETHTOOL_SFLAGS:
3237 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3238 break;
3239 case ETHTOOL_GPFLAGS:
3240 rc = ethtool_get_value(dev, useraddr, ethcmd,
3241 dev->ethtool_ops->get_priv_flags);
3242 if (!rc)
3243 ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
3244 break;
3245 case ETHTOOL_SPFLAGS:
3246 rc = ethtool_set_value(dev, useraddr,
3247 dev->ethtool_ops->set_priv_flags);
3248 break;
3249 case ETHTOOL_GRXFH:
3250 case ETHTOOL_GRXRINGS:
3251 case ETHTOOL_GRXCLSRLCNT:
3252 case ETHTOOL_GRXCLSRULE:
3253 case ETHTOOL_GRXCLSRLALL:
3254 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
3255 break;
3256 case ETHTOOL_SRXFH:
3257 case ETHTOOL_SRXCLSRLDEL:
3258 case ETHTOOL_SRXCLSRLINS:
3259 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
3260 break;
3261 case ETHTOOL_FLASHDEV:
3262 rc = ethtool_flash_device(dev, devlink_state);
3263 break;
3264 case ETHTOOL_RESET:
3265 rc = ethtool_reset(dev, useraddr);
3266 break;
3267 case ETHTOOL_GSSET_INFO:
3268 rc = ethtool_get_sset_info(dev, useraddr);
3269 break;
3270 case ETHTOOL_GRXFHINDIR:
3271 rc = ethtool_get_rxfh_indir(dev, useraddr);
3272 break;
3273 case ETHTOOL_SRXFHINDIR:
3274 rc = ethtool_set_rxfh_indir(dev, useraddr);
3275 break;
3276 case ETHTOOL_GRSSH:
3277 rc = ethtool_get_rxfh(dev, useraddr);
3278 break;
3279 case ETHTOOL_SRSSH:
3280 rc = ethtool_set_rxfh(dev, useraddr);
3281 break;
3282 case ETHTOOL_GFEATURES:
3283 rc = ethtool_get_features(dev, useraddr);
3284 break;
3285 case ETHTOOL_SFEATURES:
3286 rc = ethtool_set_features(dev, useraddr);
3287 break;
3288 case ETHTOOL_GTXCSUM:
3289 case ETHTOOL_GRXCSUM:
3290 case ETHTOOL_GSG:
3291 case ETHTOOL_GTSO:
3292 case ETHTOOL_GGSO:
3293 case ETHTOOL_GGRO:
3294 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
3295 break;
3296 case ETHTOOL_STXCSUM:
3297 case ETHTOOL_SRXCSUM:
3298 case ETHTOOL_SSG:
3299 case ETHTOOL_STSO:
3300 case ETHTOOL_SGSO:
3301 case ETHTOOL_SGRO:
3302 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
3303 break;
3304 case ETHTOOL_GCHANNELS:
3305 rc = ethtool_get_channels(dev, useraddr);
3306 break;
3307 case ETHTOOL_SCHANNELS:
3308 rc = ethtool_set_channels(dev, useraddr);
3309 break;
3310 case ETHTOOL_SET_DUMP:
3311 rc = ethtool_set_dump(dev, useraddr);
3312 break;
3313 case ETHTOOL_GET_DUMP_FLAG:
3314 rc = ethtool_get_dump_flag(dev, useraddr);
3315 break;
3316 case ETHTOOL_GET_DUMP_DATA:
3317 rc = ethtool_get_dump_data(dev, useraddr);
3318 break;
3319 case ETHTOOL_GET_TS_INFO:
3320 rc = ethtool_get_ts_info(dev, useraddr);
3321 break;
3322 case ETHTOOL_GMODULEINFO:
3323 rc = ethtool_get_module_info(dev, useraddr);
3324 break;
3325 case ETHTOOL_GMODULEEEPROM:
3326 rc = ethtool_get_module_eeprom(dev, useraddr);
3327 break;
3328 case ETHTOOL_GTUNABLE:
3329 rc = ethtool_get_tunable(dev, useraddr);
3330 break;
3331 case ETHTOOL_STUNABLE:
3332 rc = ethtool_set_tunable(dev, useraddr);
3333 break;
3334 case ETHTOOL_GPHYSTATS:
3335 rc = ethtool_get_phy_stats(dev, useraddr);
3336 break;
3337 case ETHTOOL_PERQUEUE:
3338 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
3339 break;
3340 case ETHTOOL_GLINKSETTINGS:
3341 rc = ethtool_get_link_ksettings(dev, useraddr);
3342 break;
3343 case ETHTOOL_SLINKSETTINGS:
3344 rc = ethtool_set_link_ksettings(dev, useraddr);
3345 break;
3346 case ETHTOOL_PHY_GTUNABLE:
3347 rc = get_phy_tunable(dev, useraddr);
3348 break;
3349 case ETHTOOL_PHY_STUNABLE:
3350 rc = set_phy_tunable(dev, useraddr);
3351 break;
3352 case ETHTOOL_GFECPARAM:
3353 rc = ethtool_get_fecparam(dev, useraddr);
3354 break;
3355 case ETHTOOL_SFECPARAM:
3356 rc = ethtool_set_fecparam(dev, useraddr);
3357 break;
3358 default:
3359 rc = -EOPNOTSUPP;
3360 }
3361
3362 if (dev->ethtool_ops->complete)
3363 dev->ethtool_ops->complete(dev);
3364
3365 if (old_features != dev->features)
3366 netdev_features_change(dev);
3367out:
3368 if (dev->dev.parent)
3369 pm_runtime_put(dev->dev.parent);
3370
3371 return rc;
3372}
3373
3374int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
3375{
3376 struct ethtool_devlink_compat *state;
3377 u32 ethcmd;
3378 int rc;
3379
3380 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
3381 return -EFAULT;
3382
3383 state = kzalloc(sizeof(*state), GFP_KERNEL);
3384 if (!state)
3385 return -ENOMEM;
3386
3387 switch (ethcmd) {
3388 case ETHTOOL_FLASHDEV:
3389 if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) {
3390 rc = -EFAULT;
3391 goto exit_free;
3392 }
3393 state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
3394 break;
3395 }
3396
3397 rtnl_lock();
3398 rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state);
3399 rtnl_unlock();
3400 if (rc)
3401 goto exit_free;
3402
3403 switch (ethcmd) {
3404 case ETHTOOL_FLASHDEV:
3405 if (state->devlink)
3406 rc = devlink_compat_flash_update(state->devlink,
3407 state->efl.data);
3408 break;
3409 case ETHTOOL_GDRVINFO:
3410 if (state->devlink)
3411 devlink_compat_running_version(state->devlink,
3412 state->info.fw_version,
3413 sizeof(state->info.fw_version));
3414 if (copy_to_user(useraddr, &state->info, sizeof(state->info))) {
3415 rc = -EFAULT;
3416 goto exit_free;
3417 }
3418 break;
3419 }
3420
3421exit_free:
3422 if (state->devlink)
3423 devlink_put(state->devlink);
3424 kfree(state);
3425 return rc;
3426}
3427
3428struct ethtool_rx_flow_key {
3429 struct flow_dissector_key_basic basic;
3430 union {
3431 struct flow_dissector_key_ipv4_addrs ipv4;
3432 struct flow_dissector_key_ipv6_addrs ipv6;
3433 };
3434 struct flow_dissector_key_ports tp;
3435 struct flow_dissector_key_ip ip;
3436 struct flow_dissector_key_vlan vlan;
3437 struct flow_dissector_key_eth_addrs eth_addrs;
3438} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
3439
3440struct ethtool_rx_flow_match {
3441 struct flow_dissector dissector;
3442 struct ethtool_rx_flow_key key;
3443 struct ethtool_rx_flow_key mask;
3444};
3445
3446struct ethtool_rx_flow_rule *
3447ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
3448{
3449 const struct ethtool_rx_flow_spec *fs = input->fs;
3450 struct ethtool_rx_flow_match *match;
3451 struct ethtool_rx_flow_rule *flow;
3452 struct flow_action_entry *act;
3453
3454 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
3455 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
3456 if (!flow)
3457 return ERR_PTR(-ENOMEM);
3458
3459 /* ethtool_rx supports only one single action per rule. */
3460 flow->rule = flow_rule_alloc(1);
3461 if (!flow->rule) {
3462 kfree(flow);
3463 return ERR_PTR(-ENOMEM);
3464 }
3465
3466 match = (struct ethtool_rx_flow_match *)flow->priv;
3467 flow->rule->match.dissector = &match->dissector;
3468 flow->rule->match.mask = &match->mask;
3469 flow->rule->match.key = &match->key;
3470
3471 match->mask.basic.n_proto = htons(0xffff);
3472
3473 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3474 case ETHER_FLOW: {
3475 const struct ethhdr *ether_spec, *ether_m_spec;
3476
3477 ether_spec = &fs->h_u.ether_spec;
3478 ether_m_spec = &fs->m_u.ether_spec;
3479
3480 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
3481 ether_addr_copy(match->key.eth_addrs.src,
3482 ether_spec->h_source);
3483 ether_addr_copy(match->mask.eth_addrs.src,
3484 ether_m_spec->h_source);
3485 }
3486 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
3487 ether_addr_copy(match->key.eth_addrs.dst,
3488 ether_spec->h_dest);
3489 ether_addr_copy(match->mask.eth_addrs.dst,
3490 ether_m_spec->h_dest);
3491 }
3492 if (ether_m_spec->h_proto) {
3493 match->key.basic.n_proto = ether_spec->h_proto;
3494 match->mask.basic.n_proto = ether_m_spec->h_proto;
3495 }
3496 }
3497 break;
3498 case TCP_V4_FLOW:
3499 case UDP_V4_FLOW: {
3500 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
3501
3502 match->key.basic.n_proto = htons(ETH_P_IP);
3503
3504 v4_spec = &fs->h_u.tcp_ip4_spec;
3505 v4_m_spec = &fs->m_u.tcp_ip4_spec;
3506
3507 if (v4_m_spec->ip4src) {
3508 match->key.ipv4.src = v4_spec->ip4src;
3509 match->mask.ipv4.src = v4_m_spec->ip4src;
3510 }
3511 if (v4_m_spec->ip4dst) {
3512 match->key.ipv4.dst = v4_spec->ip4dst;
3513 match->mask.ipv4.dst = v4_m_spec->ip4dst;
3514 }
3515 if (v4_m_spec->ip4src ||
3516 v4_m_spec->ip4dst) {
3517 match->dissector.used_keys |=
3518 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
3519 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
3520 offsetof(struct ethtool_rx_flow_key, ipv4);
3521 }
3522 if (v4_m_spec->psrc) {
3523 match->key.tp.src = v4_spec->psrc;
3524 match->mask.tp.src = v4_m_spec->psrc;
3525 }
3526 if (v4_m_spec->pdst) {
3527 match->key.tp.dst = v4_spec->pdst;
3528 match->mask.tp.dst = v4_m_spec->pdst;
3529 }
3530 if (v4_m_spec->psrc ||
3531 v4_m_spec->pdst) {
3532 match->dissector.used_keys |=
3533 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3534 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3535 offsetof(struct ethtool_rx_flow_key, tp);
3536 }
3537 if (v4_m_spec->tos) {
3538 match->key.ip.tos = v4_spec->tos;
3539 match->mask.ip.tos = v4_m_spec->tos;
3540 match->dissector.used_keys |=
3541 BIT(FLOW_DISSECTOR_KEY_IP);
3542 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3543 offsetof(struct ethtool_rx_flow_key, ip);
3544 }
3545 }
3546 break;
3547 case TCP_V6_FLOW:
3548 case UDP_V6_FLOW: {
3549 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
3550
3551 match->key.basic.n_proto = htons(ETH_P_IPV6);
3552
3553 v6_spec = &fs->h_u.tcp_ip6_spec;
3554 v6_m_spec = &fs->m_u.tcp_ip6_spec;
3555 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) {
3556 memcpy(&match->key.ipv6.src, v6_spec->ip6src,
3557 sizeof(match->key.ipv6.src));
3558 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
3559 sizeof(match->mask.ipv6.src));
3560 }
3561 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3562 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
3563 sizeof(match->key.ipv6.dst));
3564 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
3565 sizeof(match->mask.ipv6.dst));
3566 }
3567 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) ||
3568 !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3569 match->dissector.used_keys |=
3570 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
3571 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
3572 offsetof(struct ethtool_rx_flow_key, ipv6);
3573 }
3574 if (v6_m_spec->psrc) {
3575 match->key.tp.src = v6_spec->psrc;
3576 match->mask.tp.src = v6_m_spec->psrc;
3577 }
3578 if (v6_m_spec->pdst) {
3579 match->key.tp.dst = v6_spec->pdst;
3580 match->mask.tp.dst = v6_m_spec->pdst;
3581 }
3582 if (v6_m_spec->psrc ||
3583 v6_m_spec->pdst) {
3584 match->dissector.used_keys |=
3585 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3586 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3587 offsetof(struct ethtool_rx_flow_key, tp);
3588 }
3589 if (v6_m_spec->tclass) {
3590 match->key.ip.tos = v6_spec->tclass;
3591 match->mask.ip.tos = v6_m_spec->tclass;
3592 match->dissector.used_keys |=
3593 BIT_ULL(FLOW_DISSECTOR_KEY_IP);
3594 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3595 offsetof(struct ethtool_rx_flow_key, ip);
3596 }
3597 }
3598 break;
3599 default:
3600 ethtool_rx_flow_rule_destroy(flow);
3601 return ERR_PTR(-EINVAL);
3602 }
3603
3604 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3605 case TCP_V4_FLOW:
3606 case TCP_V6_FLOW:
3607 match->key.basic.ip_proto = IPPROTO_TCP;
3608 match->mask.basic.ip_proto = 0xff;
3609 break;
3610 case UDP_V4_FLOW:
3611 case UDP_V6_FLOW:
3612 match->key.basic.ip_proto = IPPROTO_UDP;
3613 match->mask.basic.ip_proto = 0xff;
3614 break;
3615 }
3616
3617 match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC);
3618 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3619 offsetof(struct ethtool_rx_flow_key, basic);
3620
3621 if (fs->flow_type & FLOW_EXT) {
3622 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3623 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3624
3625 if (ext_m_spec->vlan_etype) {
3626 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3627 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3628 }
3629
3630 if (ext_m_spec->vlan_tci) {
3631 match->key.vlan.vlan_id =
3632 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3633 match->mask.vlan.vlan_id =
3634 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3635
3636 match->key.vlan.vlan_dei =
3637 !!(ext_h_spec->vlan_tci & htons(0x1000));
3638 match->mask.vlan.vlan_dei =
3639 !!(ext_m_spec->vlan_tci & htons(0x1000));
3640
3641 match->key.vlan.vlan_priority =
3642 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3643 match->mask.vlan.vlan_priority =
3644 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3645 }
3646
3647 if (ext_m_spec->vlan_etype ||
3648 ext_m_spec->vlan_tci) {
3649 match->dissector.used_keys |=
3650 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN);
3651 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3652 offsetof(struct ethtool_rx_flow_key, vlan);
3653 }
3654 }
3655 if (fs->flow_type & FLOW_MAC_EXT) {
3656 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3657 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3658
3659 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3660 ETH_ALEN);
3661 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3662 ETH_ALEN);
3663
3664 match->dissector.used_keys |=
3665 BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3666 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3667 offsetof(struct ethtool_rx_flow_key, eth_addrs);
3668 }
3669
3670 act = &flow->rule->action.entries[0];
3671 switch (fs->ring_cookie) {
3672 case RX_CLS_FLOW_DISC:
3673 act->id = FLOW_ACTION_DROP;
3674 break;
3675 case RX_CLS_FLOW_WAKE:
3676 act->id = FLOW_ACTION_WAKE;
3677 break;
3678 default:
3679 act->id = FLOW_ACTION_QUEUE;
3680 if (fs->flow_type & FLOW_RSS)
3681 act->queue.ctx = input->rss_ctx;
3682
3683 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3684 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3685 break;
3686 }
3687
3688 return flow;
3689}
3690EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3691
3692void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3693{
3694 kfree(flow->rule);
3695 kfree(flow);
3696}
3697EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);
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 */
38struct ethtool_devlink_compat {
39 struct devlink *devlink;
40 union {
41 struct ethtool_flash efl;
42 struct ethtool_drvinfo info;
43 };
44};
45
46static 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
59u32 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}
66EXPORT_SYMBOL(ethtool_op_get_link);
67
68int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
69{
70 info->so_timestamping =
71 SOF_TIMESTAMPING_TX_SOFTWARE |
72 SOF_TIMESTAMPING_RX_SOFTWARE |
73 SOF_TIMESTAMPING_SOFTWARE;
74 info->phc_index = -1;
75 return 0;
76}
77EXPORT_SYMBOL(ethtool_op_get_ts_info);
78
79/* Handlers for each ethtool command */
80
81static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
82{
83 struct ethtool_gfeatures cmd = {
84 .cmd = ETHTOOL_GFEATURES,
85 .size = ETHTOOL_DEV_FEATURE_WORDS,
86 };
87 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
88 u32 __user *sizeaddr;
89 u32 copy_size;
90 int i;
91
92 /* in case feature bits run out again */
93 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
94
95 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
96 features[i].available = (u32)(dev->hw_features >> (32 * i));
97 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
98 features[i].active = (u32)(dev->features >> (32 * i));
99 features[i].never_changed =
100 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
101 }
102
103 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
104 if (get_user(copy_size, sizeaddr))
105 return -EFAULT;
106
107 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
108 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
109
110 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
111 return -EFAULT;
112 useraddr += sizeof(cmd);
113 if (copy_to_user(useraddr, features,
114 array_size(copy_size, sizeof(*features))))
115 return -EFAULT;
116
117 return 0;
118}
119
120static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
121{
122 struct ethtool_sfeatures cmd;
123 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
124 netdev_features_t wanted = 0, valid = 0;
125 int i, ret = 0;
126
127 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
128 return -EFAULT;
129 useraddr += sizeof(cmd);
130
131 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
132 return -EINVAL;
133
134 if (copy_from_user(features, useraddr, sizeof(features)))
135 return -EFAULT;
136
137 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
138 valid |= (netdev_features_t)features[i].valid << (32 * i);
139 wanted |= (netdev_features_t)features[i].requested << (32 * i);
140 }
141
142 if (valid & ~NETIF_F_ETHTOOL_BITS)
143 return -EINVAL;
144
145 if (valid & ~dev->hw_features) {
146 valid &= dev->hw_features;
147 ret |= ETHTOOL_F_UNSUPPORTED;
148 }
149
150 dev->wanted_features &= ~valid;
151 dev->wanted_features |= wanted & valid;
152 __netdev_update_features(dev);
153
154 if ((dev->wanted_features ^ dev->features) & valid)
155 ret |= ETHTOOL_F_WISH;
156
157 return ret;
158}
159
160static int __ethtool_get_sset_count(struct net_device *dev, int sset)
161{
162 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
163 const struct ethtool_ops *ops = dev->ethtool_ops;
164
165 if (sset == ETH_SS_FEATURES)
166 return ARRAY_SIZE(netdev_features_strings);
167
168 if (sset == ETH_SS_RSS_HASH_FUNCS)
169 return ARRAY_SIZE(rss_hash_func_strings);
170
171 if (sset == ETH_SS_TUNABLES)
172 return ARRAY_SIZE(tunable_strings);
173
174 if (sset == ETH_SS_PHY_TUNABLES)
175 return ARRAY_SIZE(phy_tunable_strings);
176
177 if (sset == ETH_SS_PHY_STATS && dev->phydev &&
178 !ops->get_ethtool_phy_stats &&
179 phy_ops && phy_ops->get_sset_count)
180 return phy_ops->get_sset_count(dev->phydev);
181
182 if (sset == ETH_SS_LINK_MODES)
183 return __ETHTOOL_LINK_MODE_MASK_NBITS;
184
185 if (ops->get_sset_count && ops->get_strings)
186 return ops->get_sset_count(dev, sset);
187 else
188 return -EOPNOTSUPP;
189}
190
191static void __ethtool_get_strings(struct net_device *dev,
192 u32 stringset, u8 *data)
193{
194 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
195 const struct ethtool_ops *ops = dev->ethtool_ops;
196
197 if (stringset == ETH_SS_FEATURES)
198 memcpy(data, netdev_features_strings,
199 sizeof(netdev_features_strings));
200 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
201 memcpy(data, rss_hash_func_strings,
202 sizeof(rss_hash_func_strings));
203 else if (stringset == ETH_SS_TUNABLES)
204 memcpy(data, tunable_strings, sizeof(tunable_strings));
205 else if (stringset == ETH_SS_PHY_TUNABLES)
206 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
207 else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
208 !ops->get_ethtool_phy_stats && phy_ops &&
209 phy_ops->get_strings)
210 phy_ops->get_strings(dev->phydev, data);
211 else if (stringset == ETH_SS_LINK_MODES)
212 memcpy(data, link_mode_names,
213 __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN);
214 else
215 /* ops->get_strings is valid because checked earlier */
216 ops->get_strings(dev, stringset, data);
217}
218
219static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
220{
221 /* feature masks of legacy discrete ethtool ops */
222
223 switch (eth_cmd) {
224 case ETHTOOL_GTXCSUM:
225 case ETHTOOL_STXCSUM:
226 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC |
227 NETIF_F_SCTP_CRC;
228 case ETHTOOL_GRXCSUM:
229 case ETHTOOL_SRXCSUM:
230 return NETIF_F_RXCSUM;
231 case ETHTOOL_GSG:
232 case ETHTOOL_SSG:
233 return NETIF_F_SG | NETIF_F_FRAGLIST;
234 case ETHTOOL_GTSO:
235 case ETHTOOL_STSO:
236 return NETIF_F_ALL_TSO;
237 case ETHTOOL_GGSO:
238 case ETHTOOL_SGSO:
239 return NETIF_F_GSO;
240 case ETHTOOL_GGRO:
241 case ETHTOOL_SGRO:
242 return NETIF_F_GRO;
243 default:
244 BUG();
245 }
246}
247
248static int ethtool_get_one_feature(struct net_device *dev,
249 char __user *useraddr, u32 ethcmd)
250{
251 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
252 struct ethtool_value edata = {
253 .cmd = ethcmd,
254 .data = !!(dev->features & mask),
255 };
256
257 if (copy_to_user(useraddr, &edata, sizeof(edata)))
258 return -EFAULT;
259 return 0;
260}
261
262static int ethtool_set_one_feature(struct net_device *dev,
263 void __user *useraddr, u32 ethcmd)
264{
265 struct ethtool_value edata;
266 netdev_features_t mask;
267
268 if (copy_from_user(&edata, useraddr, sizeof(edata)))
269 return -EFAULT;
270
271 mask = ethtool_get_feature_mask(ethcmd);
272 mask &= dev->hw_features;
273 if (!mask)
274 return -EOPNOTSUPP;
275
276 if (edata.data)
277 dev->wanted_features |= mask;
278 else
279 dev->wanted_features &= ~mask;
280
281 __netdev_update_features(dev);
282
283 return 0;
284}
285
286#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
287 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
288#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
289 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
290 NETIF_F_RXHASH)
291
292static u32 __ethtool_get_flags(struct net_device *dev)
293{
294 u32 flags = 0;
295
296 if (dev->features & NETIF_F_LRO)
297 flags |= ETH_FLAG_LRO;
298 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
299 flags |= ETH_FLAG_RXVLAN;
300 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
301 flags |= ETH_FLAG_TXVLAN;
302 if (dev->features & NETIF_F_NTUPLE)
303 flags |= ETH_FLAG_NTUPLE;
304 if (dev->features & NETIF_F_RXHASH)
305 flags |= ETH_FLAG_RXHASH;
306
307 return flags;
308}
309
310static int __ethtool_set_flags(struct net_device *dev, u32 data)
311{
312 netdev_features_t features = 0, changed;
313
314 if (data & ~ETH_ALL_FLAGS)
315 return -EINVAL;
316
317 if (data & ETH_FLAG_LRO)
318 features |= NETIF_F_LRO;
319 if (data & ETH_FLAG_RXVLAN)
320 features |= NETIF_F_HW_VLAN_CTAG_RX;
321 if (data & ETH_FLAG_TXVLAN)
322 features |= NETIF_F_HW_VLAN_CTAG_TX;
323 if (data & ETH_FLAG_NTUPLE)
324 features |= NETIF_F_NTUPLE;
325 if (data & ETH_FLAG_RXHASH)
326 features |= NETIF_F_RXHASH;
327
328 /* allow changing only bits set in hw_features */
329 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
330 if (changed & ~dev->hw_features)
331 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
332
333 dev->wanted_features =
334 (dev->wanted_features & ~changed) | (features & changed);
335
336 __netdev_update_features(dev);
337
338 return 0;
339}
340
341/* Given two link masks, AND them together and save the result in dst. */
342void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
343 struct ethtool_link_ksettings *src)
344{
345 unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
346 unsigned int idx = 0;
347
348 for (; idx < size; idx++) {
349 dst->link_modes.supported[idx] &=
350 src->link_modes.supported[idx];
351 dst->link_modes.advertising[idx] &=
352 src->link_modes.advertising[idx];
353 }
354}
355EXPORT_SYMBOL(ethtool_intersect_link_masks);
356
357void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
358 u32 legacy_u32)
359{
360 linkmode_zero(dst);
361 dst[0] = legacy_u32;
362}
363EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
364
365/* return false if src had higher bits set. lower bits always updated. */
366bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
367 const unsigned long *src)
368{
369 *legacy_u32 = src[0];
370 return find_next_bit(src, __ETHTOOL_LINK_MODE_MASK_NBITS, 32) ==
371 __ETHTOOL_LINK_MODE_MASK_NBITS;
372}
373EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
374
375/* return false if ksettings link modes had higher bits
376 * set. legacy_settings always updated (best effort)
377 */
378static bool
379convert_link_ksettings_to_legacy_settings(
380 struct ethtool_cmd *legacy_settings,
381 const struct ethtool_link_ksettings *link_ksettings)
382{
383 bool retval = true;
384
385 memset(legacy_settings, 0, sizeof(*legacy_settings));
386 /* this also clears the deprecated fields in legacy structure:
387 * __u8 transceiver;
388 * __u32 maxtxpkt;
389 * __u32 maxrxpkt;
390 */
391
392 retval &= ethtool_convert_link_mode_to_legacy_u32(
393 &legacy_settings->supported,
394 link_ksettings->link_modes.supported);
395 retval &= ethtool_convert_link_mode_to_legacy_u32(
396 &legacy_settings->advertising,
397 link_ksettings->link_modes.advertising);
398 retval &= ethtool_convert_link_mode_to_legacy_u32(
399 &legacy_settings->lp_advertising,
400 link_ksettings->link_modes.lp_advertising);
401 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
402 legacy_settings->duplex
403 = link_ksettings->base.duplex;
404 legacy_settings->port
405 = link_ksettings->base.port;
406 legacy_settings->phy_address
407 = link_ksettings->base.phy_address;
408 legacy_settings->autoneg
409 = link_ksettings->base.autoneg;
410 legacy_settings->mdio_support
411 = link_ksettings->base.mdio_support;
412 legacy_settings->eth_tp_mdix
413 = link_ksettings->base.eth_tp_mdix;
414 legacy_settings->eth_tp_mdix_ctrl
415 = link_ksettings->base.eth_tp_mdix_ctrl;
416 legacy_settings->transceiver
417 = link_ksettings->base.transceiver;
418 return retval;
419}
420
421/* number of 32-bit words to store the user's link mode bitmaps */
422#define __ETHTOOL_LINK_MODE_MASK_NU32 \
423 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
424
425/* layout of the struct passed from/to userland */
426struct ethtool_link_usettings {
427 struct ethtool_link_settings base;
428 struct {
429 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
430 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
431 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
432 } link_modes;
433};
434
435/* Internal kernel helper to query a device ethtool_link_settings. */
436int __ethtool_get_link_ksettings(struct net_device *dev,
437 struct ethtool_link_ksettings *link_ksettings)
438{
439 ASSERT_RTNL();
440
441 if (!dev->ethtool_ops->get_link_ksettings)
442 return -EOPNOTSUPP;
443
444 memset(link_ksettings, 0, sizeof(*link_ksettings));
445 return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
446}
447EXPORT_SYMBOL(__ethtool_get_link_ksettings);
448
449/* convert ethtool_link_usettings in user space to a kernel internal
450 * ethtool_link_ksettings. return 0 on success, errno on error.
451 */
452static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
453 const void __user *from)
454{
455 struct ethtool_link_usettings link_usettings;
456
457 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
458 return -EFAULT;
459
460 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
461 bitmap_from_arr32(to->link_modes.supported,
462 link_usettings.link_modes.supported,
463 __ETHTOOL_LINK_MODE_MASK_NBITS);
464 bitmap_from_arr32(to->link_modes.advertising,
465 link_usettings.link_modes.advertising,
466 __ETHTOOL_LINK_MODE_MASK_NBITS);
467 bitmap_from_arr32(to->link_modes.lp_advertising,
468 link_usettings.link_modes.lp_advertising,
469 __ETHTOOL_LINK_MODE_MASK_NBITS);
470
471 return 0;
472}
473
474/* Check if the user is trying to change anything besides speed/duplex */
475bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd)
476{
477 struct ethtool_link_settings base2 = {};
478
479 base2.speed = cmd->base.speed;
480 base2.port = PORT_OTHER;
481 base2.duplex = cmd->base.duplex;
482 base2.cmd = cmd->base.cmd;
483 base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords;
484
485 return !memcmp(&base2, &cmd->base, sizeof(base2)) &&
486 bitmap_empty(cmd->link_modes.supported,
487 __ETHTOOL_LINK_MODE_MASK_NBITS) &&
488 bitmap_empty(cmd->link_modes.lp_advertising,
489 __ETHTOOL_LINK_MODE_MASK_NBITS);
490}
491
492/* convert a kernel internal ethtool_link_ksettings to
493 * ethtool_link_usettings in user space. return 0 on success, errno on
494 * error.
495 */
496static int
497store_link_ksettings_for_user(void __user *to,
498 const struct ethtool_link_ksettings *from)
499{
500 struct ethtool_link_usettings link_usettings;
501
502 memcpy(&link_usettings, from, sizeof(link_usettings));
503 bitmap_to_arr32(link_usettings.link_modes.supported,
504 from->link_modes.supported,
505 __ETHTOOL_LINK_MODE_MASK_NBITS);
506 bitmap_to_arr32(link_usettings.link_modes.advertising,
507 from->link_modes.advertising,
508 __ETHTOOL_LINK_MODE_MASK_NBITS);
509 bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
510 from->link_modes.lp_advertising,
511 __ETHTOOL_LINK_MODE_MASK_NBITS);
512
513 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
514 return -EFAULT;
515
516 return 0;
517}
518
519/* Query device for its ethtool_link_settings. */
520static int ethtool_get_link_ksettings(struct net_device *dev,
521 void __user *useraddr)
522{
523 int err = 0;
524 struct ethtool_link_ksettings link_ksettings;
525
526 ASSERT_RTNL();
527 if (!dev->ethtool_ops->get_link_ksettings)
528 return -EOPNOTSUPP;
529
530 /* handle bitmap nbits handshake */
531 if (copy_from_user(&link_ksettings.base, useraddr,
532 sizeof(link_ksettings.base)))
533 return -EFAULT;
534
535 if (__ETHTOOL_LINK_MODE_MASK_NU32
536 != link_ksettings.base.link_mode_masks_nwords) {
537 /* wrong link mode nbits requested */
538 memset(&link_ksettings, 0, sizeof(link_ksettings));
539 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
540 /* send back number of words required as negative val */
541 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
542 "need too many bits for link modes!");
543 link_ksettings.base.link_mode_masks_nwords
544 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
545
546 /* copy the base fields back to user, not the link
547 * mode bitmaps
548 */
549 if (copy_to_user(useraddr, &link_ksettings.base,
550 sizeof(link_ksettings.base)))
551 return -EFAULT;
552
553 return 0;
554 }
555
556 /* handshake successful: user/kernel agree on
557 * link_mode_masks_nwords
558 */
559
560 memset(&link_ksettings, 0, sizeof(link_ksettings));
561 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
562 if (err < 0)
563 return err;
564
565 /* make sure we tell the right values to user */
566 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
567 link_ksettings.base.link_mode_masks_nwords
568 = __ETHTOOL_LINK_MODE_MASK_NU32;
569 link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED;
570 link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
571 link_ksettings.base.rate_matching = RATE_MATCH_NONE;
572
573 return store_link_ksettings_for_user(useraddr, &link_ksettings);
574}
575
576/* Update device ethtool_link_settings. */
577static int ethtool_set_link_ksettings(struct net_device *dev,
578 void __user *useraddr)
579{
580 struct ethtool_link_ksettings link_ksettings = {};
581 int err;
582
583 ASSERT_RTNL();
584
585 if (!dev->ethtool_ops->set_link_ksettings)
586 return -EOPNOTSUPP;
587
588 /* make sure nbits field has expected value */
589 if (copy_from_user(&link_ksettings.base, useraddr,
590 sizeof(link_ksettings.base)))
591 return -EFAULT;
592
593 if (__ETHTOOL_LINK_MODE_MASK_NU32
594 != link_ksettings.base.link_mode_masks_nwords)
595 return -EINVAL;
596
597 /* copy the whole structure, now that we know it has expected
598 * format
599 */
600 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
601 if (err)
602 return err;
603
604 /* re-check nwords field, just in case */
605 if (__ETHTOOL_LINK_MODE_MASK_NU32
606 != link_ksettings.base.link_mode_masks_nwords)
607 return -EINVAL;
608
609 if (link_ksettings.base.master_slave_cfg ||
610 link_ksettings.base.master_slave_state)
611 return -EINVAL;
612
613 err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
614 if (err >= 0) {
615 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
616 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
617 }
618 return err;
619}
620
621int ethtool_virtdev_set_link_ksettings(struct net_device *dev,
622 const struct ethtool_link_ksettings *cmd,
623 u32 *dev_speed, u8 *dev_duplex)
624{
625 u32 speed;
626 u8 duplex;
627
628 speed = cmd->base.speed;
629 duplex = cmd->base.duplex;
630 /* don't allow custom speed and duplex */
631 if (!ethtool_validate_speed(speed) ||
632 !ethtool_validate_duplex(duplex) ||
633 !ethtool_virtdev_validate_cmd(cmd))
634 return -EINVAL;
635 *dev_speed = speed;
636 *dev_duplex = duplex;
637
638 return 0;
639}
640EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings);
641
642/* Query device for its ethtool_cmd settings.
643 *
644 * Backward compatibility note: for compatibility with legacy ethtool, this is
645 * now implemented via get_link_ksettings. When driver reports higher link mode
646 * bits, a kernel warning is logged once (with name of 1st driver/device) to
647 * recommend user to upgrade ethtool, but the command is successful (only the
648 * lower link mode bits reported back to user). Deprecated fields from
649 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
650 */
651static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
652{
653 struct ethtool_link_ksettings link_ksettings;
654 struct ethtool_cmd cmd;
655 int err;
656
657 ASSERT_RTNL();
658 if (!dev->ethtool_ops->get_link_ksettings)
659 return -EOPNOTSUPP;
660
661 memset(&link_ksettings, 0, sizeof(link_ksettings));
662 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
663 if (err < 0)
664 return err;
665 convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
666
667 /* send a sensible cmd tag back to user */
668 cmd.cmd = ETHTOOL_GSET;
669
670 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
671 return -EFAULT;
672
673 return 0;
674}
675
676/* Update device link settings with given ethtool_cmd.
677 *
678 * Backward compatibility note: for compatibility with legacy ethtool, this is
679 * now always implemented via set_link_settings. When user's request updates
680 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
681 * warning is logged once (with name of 1st driver/device) to recommend user to
682 * upgrade ethtool, and the request is rejected.
683 */
684static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
685{
686 struct ethtool_link_ksettings link_ksettings;
687 struct ethtool_cmd cmd;
688 int ret;
689
690 ASSERT_RTNL();
691
692 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
693 return -EFAULT;
694 if (!dev->ethtool_ops->set_link_ksettings)
695 return -EOPNOTSUPP;
696
697 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
698 return -EINVAL;
699 link_ksettings.base.link_mode_masks_nwords =
700 __ETHTOOL_LINK_MODE_MASK_NU32;
701 ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
702 if (ret >= 0) {
703 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL);
704 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
705 }
706 return ret;
707}
708
709static int
710ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp)
711{
712 const struct ethtool_ops *ops = dev->ethtool_ops;
713 struct device *parent = dev->dev.parent;
714
715 rsp->info.cmd = ETHTOOL_GDRVINFO;
716 strscpy(rsp->info.version, init_uts_ns.name.release,
717 sizeof(rsp->info.version));
718 if (ops->get_drvinfo) {
719 ops->get_drvinfo(dev, &rsp->info);
720 if (!rsp->info.bus_info[0] && parent)
721 strscpy(rsp->info.bus_info, dev_name(parent),
722 sizeof(rsp->info.bus_info));
723 if (!rsp->info.driver[0] && parent && parent->driver)
724 strscpy(rsp->info.driver, parent->driver->name,
725 sizeof(rsp->info.driver));
726 } else if (parent && parent->driver) {
727 strscpy(rsp->info.bus_info, dev_name(parent),
728 sizeof(rsp->info.bus_info));
729 strscpy(rsp->info.driver, parent->driver->name,
730 sizeof(rsp->info.driver));
731 } else if (dev->rtnl_link_ops) {
732 strscpy(rsp->info.driver, dev->rtnl_link_ops->kind,
733 sizeof(rsp->info.driver));
734 } else {
735 return -EOPNOTSUPP;
736 }
737
738 /*
739 * this method of obtaining string set info is deprecated;
740 * Use ETHTOOL_GSSET_INFO instead.
741 */
742 if (ops->get_sset_count) {
743 int rc;
744
745 rc = ops->get_sset_count(dev, ETH_SS_TEST);
746 if (rc >= 0)
747 rsp->info.testinfo_len = rc;
748 rc = ops->get_sset_count(dev, ETH_SS_STATS);
749 if (rc >= 0)
750 rsp->info.n_stats = rc;
751 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
752 if (rc >= 0)
753 rsp->info.n_priv_flags = rc;
754 }
755 if (ops->get_regs_len) {
756 int ret = ops->get_regs_len(dev);
757
758 if (ret > 0)
759 rsp->info.regdump_len = ret;
760 }
761
762 if (ops->get_eeprom_len)
763 rsp->info.eedump_len = ops->get_eeprom_len(dev);
764
765 if (!rsp->info.fw_version[0])
766 rsp->devlink = netdev_to_devlink_get(dev);
767
768 return 0;
769}
770
771static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
772 void __user *useraddr)
773{
774 struct ethtool_sset_info info;
775 u64 sset_mask;
776 int i, idx = 0, n_bits = 0, ret, rc;
777 u32 *info_buf = NULL;
778
779 if (copy_from_user(&info, useraddr, sizeof(info)))
780 return -EFAULT;
781
782 /* store copy of mask, because we zero struct later on */
783 sset_mask = info.sset_mask;
784 if (!sset_mask)
785 return 0;
786
787 /* calculate size of return buffer */
788 n_bits = hweight64(sset_mask);
789
790 memset(&info, 0, sizeof(info));
791 info.cmd = ETHTOOL_GSSET_INFO;
792
793 info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
794 if (!info_buf)
795 return -ENOMEM;
796
797 /*
798 * fill return buffer based on input bitmask and successful
799 * get_sset_count return
800 */
801 for (i = 0; i < 64; i++) {
802 if (!(sset_mask & (1ULL << i)))
803 continue;
804
805 rc = __ethtool_get_sset_count(dev, i);
806 if (rc >= 0) {
807 info.sset_mask |= (1ULL << i);
808 info_buf[idx++] = rc;
809 }
810 }
811
812 ret = -EFAULT;
813 if (copy_to_user(useraddr, &info, sizeof(info)))
814 goto out;
815
816 useraddr += offsetof(struct ethtool_sset_info, data);
817 if (copy_to_user(useraddr, info_buf, array_size(idx, sizeof(u32))))
818 goto out;
819
820 ret = 0;
821
822out:
823 kfree(info_buf);
824 return ret;
825}
826
827static noinline_for_stack int
828ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
829 const struct compat_ethtool_rxnfc __user *useraddr,
830 size_t size)
831{
832 struct compat_ethtool_rxnfc crxnfc = {};
833
834 /* We expect there to be holes between fs.m_ext and
835 * fs.ring_cookie and at the end of fs, but nowhere else.
836 * On non-x86, no conversion should be needed.
837 */
838 BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) &&
839 sizeof(struct compat_ethtool_rxnfc) !=
840 sizeof(struct ethtool_rxnfc));
841 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
842 sizeof(useraddr->fs.m_ext) !=
843 offsetof(struct ethtool_rxnfc, fs.m_ext) +
844 sizeof(rxnfc->fs.m_ext));
845 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) -
846 offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
847 offsetof(struct ethtool_rxnfc, fs.location) -
848 offsetof(struct ethtool_rxnfc, fs.ring_cookie));
849
850 if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc))))
851 return -EFAULT;
852
853 *rxnfc = (struct ethtool_rxnfc) {
854 .cmd = crxnfc.cmd,
855 .flow_type = crxnfc.flow_type,
856 .data = crxnfc.data,
857 .fs = {
858 .flow_type = crxnfc.fs.flow_type,
859 .h_u = crxnfc.fs.h_u,
860 .h_ext = crxnfc.fs.h_ext,
861 .m_u = crxnfc.fs.m_u,
862 .m_ext = crxnfc.fs.m_ext,
863 .ring_cookie = crxnfc.fs.ring_cookie,
864 .location = crxnfc.fs.location,
865 },
866 .rule_cnt = crxnfc.rule_cnt,
867 };
868
869 return 0;
870}
871
872static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc,
873 const void __user *useraddr,
874 size_t size)
875{
876 if (compat_need_64bit_alignment_fixup())
877 return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size);
878
879 if (copy_from_user(rxnfc, useraddr, size))
880 return -EFAULT;
881
882 return 0;
883}
884
885static int ethtool_rxnfc_copy_to_compat(void __user *useraddr,
886 const struct ethtool_rxnfc *rxnfc,
887 size_t size, const u32 *rule_buf)
888{
889 struct compat_ethtool_rxnfc crxnfc;
890
891 memset(&crxnfc, 0, sizeof(crxnfc));
892 crxnfc = (struct compat_ethtool_rxnfc) {
893 .cmd = rxnfc->cmd,
894 .flow_type = rxnfc->flow_type,
895 .data = rxnfc->data,
896 .fs = {
897 .flow_type = rxnfc->fs.flow_type,
898 .h_u = rxnfc->fs.h_u,
899 .h_ext = rxnfc->fs.h_ext,
900 .m_u = rxnfc->fs.m_u,
901 .m_ext = rxnfc->fs.m_ext,
902 .ring_cookie = rxnfc->fs.ring_cookie,
903 .location = rxnfc->fs.location,
904 },
905 .rule_cnt = rxnfc->rule_cnt,
906 };
907
908 if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc))))
909 return -EFAULT;
910
911 return 0;
912}
913
914static int ethtool_rxnfc_copy_struct(u32 cmd, struct ethtool_rxnfc *info,
915 size_t *info_size, void __user *useraddr)
916{
917 /* struct ethtool_rxnfc was originally defined for
918 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
919 * members. User-space might still be using that
920 * definition.
921 */
922 if (cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH)
923 *info_size = (offsetof(struct ethtool_rxnfc, data) +
924 sizeof(info->data));
925
926 if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
927 return -EFAULT;
928
929 if ((cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH) && info->flow_type & FLOW_RSS) {
930 *info_size = sizeof(*info);
931 if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size))
932 return -EFAULT;
933 /* Since malicious users may modify the original data,
934 * we need to check whether FLOW_RSS is still requested.
935 */
936 if (!(info->flow_type & FLOW_RSS))
937 return -EINVAL;
938 }
939
940 if (info->cmd != cmd)
941 return -EINVAL;
942
943 return 0;
944}
945
946static int ethtool_rxnfc_copy_to_user(void __user *useraddr,
947 const struct ethtool_rxnfc *rxnfc,
948 size_t size, const u32 *rule_buf)
949{
950 int ret;
951
952 if (compat_need_64bit_alignment_fixup()) {
953 ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size,
954 rule_buf);
955 useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs);
956 } else {
957 ret = copy_to_user(useraddr, rxnfc, size);
958 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
959 }
960
961 if (ret)
962 return -EFAULT;
963
964 if (rule_buf) {
965 if (copy_to_user(useraddr, rule_buf,
966 rxnfc->rule_cnt * sizeof(u32)))
967 return -EFAULT;
968 }
969
970 return 0;
971}
972
973static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
974 u32 cmd, void __user *useraddr)
975{
976 const struct ethtool_ops *ops = dev->ethtool_ops;
977 struct ethtool_rxnfc info;
978 size_t info_size = sizeof(info);
979 int rc;
980
981 if (!ops->set_rxnfc)
982 return -EOPNOTSUPP;
983
984 rc = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
985 if (rc)
986 return rc;
987
988 if (ops->get_rxfh) {
989 struct ethtool_rxfh_param rxfh = {};
990
991 rc = ops->get_rxfh(dev, &rxfh);
992 if (rc)
993 return rc;
994
995 /* Sanity check: if symmetric-xor is set, then:
996 * 1 - no other fields besides IP src/dst and/or L4 src/dst
997 * 2 - If src is set, dst must also be set
998 */
999 if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
1000 ((info.data & ~(RXH_IP_SRC | RXH_IP_DST |
1001 RXH_L4_B_0_1 | RXH_L4_B_2_3)) ||
1002 (!!(info.data & RXH_IP_SRC) ^ !!(info.data & RXH_IP_DST)) ||
1003 (!!(info.data & RXH_L4_B_0_1) ^ !!(info.data & RXH_L4_B_2_3))))
1004 return -EINVAL;
1005 }
1006
1007 rc = ops->set_rxnfc(dev, &info);
1008 if (rc)
1009 return rc;
1010
1011 if (cmd == ETHTOOL_SRXCLSRLINS &&
1012 ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL))
1013 return -EFAULT;
1014
1015 return 0;
1016}
1017
1018static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1019 u32 cmd, void __user *useraddr)
1020{
1021 struct ethtool_rxnfc info;
1022 size_t info_size = sizeof(info);
1023 const struct ethtool_ops *ops = dev->ethtool_ops;
1024 int ret;
1025 void *rule_buf = NULL;
1026
1027 if (!ops->get_rxnfc)
1028 return -EOPNOTSUPP;
1029
1030 ret = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr);
1031 if (ret)
1032 return ret;
1033
1034 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1035 if (info.rule_cnt > 0) {
1036 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1037 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
1038 GFP_USER);
1039 if (!rule_buf)
1040 return -ENOMEM;
1041 }
1042 }
1043
1044 ret = ops->get_rxnfc(dev, &info, rule_buf);
1045 if (ret < 0)
1046 goto err_out;
1047
1048 ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf);
1049err_out:
1050 kfree(rule_buf);
1051
1052 return ret;
1053}
1054
1055static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1056 struct ethtool_rxnfc *rx_rings,
1057 u32 size)
1058{
1059 int i;
1060
1061 if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0]))))
1062 return -EFAULT;
1063
1064 /* Validate ring indices */
1065 for (i = 0; i < size; i++)
1066 if (indir[i] >= rx_rings->data)
1067 return -EINVAL;
1068
1069 return 0;
1070}
1071
1072u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1073
1074void netdev_rss_key_fill(void *buffer, size_t len)
1075{
1076 BUG_ON(len > sizeof(netdev_rss_key));
1077 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1078 memcpy(buffer, netdev_rss_key, len);
1079}
1080EXPORT_SYMBOL(netdev_rss_key_fill);
1081
1082static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1083 void __user *useraddr)
1084{
1085 struct ethtool_rxfh_param rxfh = {};
1086 u32 user_size;
1087 int ret;
1088
1089 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1090 !dev->ethtool_ops->get_rxfh)
1091 return -EOPNOTSUPP;
1092 rxfh.indir_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1093 if (rxfh.indir_size == 0)
1094 return -EOPNOTSUPP;
1095
1096 if (copy_from_user(&user_size,
1097 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1098 sizeof(user_size)))
1099 return -EFAULT;
1100
1101 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1102 &rxfh.indir_size, sizeof(rxfh.indir_size)))
1103 return -EFAULT;
1104
1105 /* If the user buffer size is 0, this is just a query for the
1106 * device table size. Otherwise, if it's smaller than the
1107 * device table size it's an error.
1108 */
1109 if (user_size < rxfh.indir_size)
1110 return user_size == 0 ? 0 : -EINVAL;
1111
1112 rxfh.indir = kcalloc(rxfh.indir_size, sizeof(rxfh.indir[0]), GFP_USER);
1113 if (!rxfh.indir)
1114 return -ENOMEM;
1115
1116 ret = dev->ethtool_ops->get_rxfh(dev, &rxfh);
1117 if (ret)
1118 goto out;
1119 if (copy_to_user(useraddr +
1120 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1121 rxfh.indir, rxfh.indir_size * sizeof(*rxfh.indir)))
1122 ret = -EFAULT;
1123
1124out:
1125 kfree(rxfh.indir);
1126 return ret;
1127}
1128
1129static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1130 void __user *useraddr)
1131{
1132 const struct ethtool_ops *ops = dev->ethtool_ops;
1133 struct ethtool_rxfh_param rxfh_dev = {};
1134 struct netlink_ext_ack *extack = NULL;
1135 struct ethtool_rxnfc rx_rings;
1136 u32 user_size, i;
1137 int ret;
1138 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1139
1140 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1141 !ops->get_rxnfc)
1142 return -EOPNOTSUPP;
1143
1144 rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1145 if (rxfh_dev.indir_size == 0)
1146 return -EOPNOTSUPP;
1147
1148 if (copy_from_user(&user_size,
1149 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1150 sizeof(user_size)))
1151 return -EFAULT;
1152
1153 if (user_size != 0 && user_size != rxfh_dev.indir_size)
1154 return -EINVAL;
1155
1156 rxfh_dev.indir = kcalloc(rxfh_dev.indir_size,
1157 sizeof(rxfh_dev.indir[0]), GFP_USER);
1158 if (!rxfh_dev.indir)
1159 return -ENOMEM;
1160
1161 rx_rings.cmd = ETHTOOL_GRXRINGS;
1162 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1163 if (ret)
1164 goto out;
1165
1166 if (user_size == 0) {
1167 u32 *indir = rxfh_dev.indir;
1168
1169 for (i = 0; i < rxfh_dev.indir_size; i++)
1170 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1171 } else {
1172 ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1173 useraddr + ringidx_offset,
1174 &rx_rings,
1175 rxfh_dev.indir_size);
1176 if (ret)
1177 goto out;
1178 }
1179
1180 rxfh_dev.hfunc = ETH_RSS_HASH_NO_CHANGE;
1181 ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1182 if (ret)
1183 goto out;
1184
1185 /* indicate whether rxfh was set to default */
1186 if (user_size == 0)
1187 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1188 else
1189 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1190
1191out:
1192 kfree(rxfh_dev.indir);
1193 return ret;
1194}
1195
1196static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1197 void __user *useraddr)
1198{
1199 const struct ethtool_ops *ops = dev->ethtool_ops;
1200 struct ethtool_rxfh_param rxfh_dev = {};
1201 u32 user_indir_size, user_key_size;
1202 struct ethtool_rxfh rxfh;
1203 u32 indir_bytes;
1204 u8 *rss_config;
1205 u32 total_size;
1206 int ret;
1207
1208 if (!ops->get_rxfh)
1209 return -EOPNOTSUPP;
1210
1211 if (ops->get_rxfh_indir_size)
1212 rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev);
1213 if (ops->get_rxfh_key_size)
1214 rxfh_dev.key_size = ops->get_rxfh_key_size(dev);
1215
1216 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1217 return -EFAULT;
1218 user_indir_size = rxfh.indir_size;
1219 user_key_size = rxfh.key_size;
1220
1221 /* Check that reserved fields are 0 for now */
1222 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1223 return -EINVAL;
1224 /* Most drivers don't handle rss_context, check it's 0 as well */
1225 if (rxfh.rss_context && !ops->cap_rss_ctx_supported)
1226 return -EOPNOTSUPP;
1227
1228 rxfh.indir_size = rxfh_dev.indir_size;
1229 rxfh.key_size = rxfh_dev.key_size;
1230 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1231 return -EFAULT;
1232
1233 if ((user_indir_size && user_indir_size != rxfh_dev.indir_size) ||
1234 (user_key_size && user_key_size != rxfh_dev.key_size))
1235 return -EINVAL;
1236
1237 indir_bytes = user_indir_size * sizeof(rxfh_dev.indir[0]);
1238 total_size = indir_bytes + user_key_size;
1239 rss_config = kzalloc(total_size, GFP_USER);
1240 if (!rss_config)
1241 return -ENOMEM;
1242
1243 if (user_indir_size)
1244 rxfh_dev.indir = (u32 *)rss_config;
1245
1246 if (user_key_size)
1247 rxfh_dev.key = rss_config + indir_bytes;
1248
1249 rxfh_dev.rss_context = rxfh.rss_context;
1250
1251 ret = dev->ethtool_ops->get_rxfh(dev, &rxfh_dev);
1252 if (ret)
1253 goto out;
1254
1255 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1256 &rxfh_dev.hfunc, sizeof(rxfh.hfunc))) {
1257 ret = -EFAULT;
1258 } else if (copy_to_user(useraddr +
1259 offsetof(struct ethtool_rxfh, input_xfrm),
1260 &rxfh_dev.input_xfrm,
1261 sizeof(rxfh.input_xfrm))) {
1262 ret = -EFAULT;
1263 } else if (copy_to_user(useraddr +
1264 offsetof(struct ethtool_rxfh, rss_config[0]),
1265 rss_config, total_size)) {
1266 ret = -EFAULT;
1267 }
1268out:
1269 kfree(rss_config);
1270
1271 return ret;
1272}
1273
1274static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1275 void __user *useraddr)
1276{
1277 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1278 const struct ethtool_ops *ops = dev->ethtool_ops;
1279 u32 dev_indir_size = 0, dev_key_size = 0, i;
1280 struct ethtool_rxfh_param rxfh_dev = {};
1281 struct netlink_ext_ack *extack = NULL;
1282 struct ethtool_rxnfc rx_rings;
1283 struct ethtool_rxfh rxfh;
1284 u32 indir_bytes = 0;
1285 u8 *rss_config;
1286 int ret;
1287
1288 if (!ops->get_rxnfc || !ops->set_rxfh)
1289 return -EOPNOTSUPP;
1290
1291 if (ops->get_rxfh_indir_size)
1292 dev_indir_size = ops->get_rxfh_indir_size(dev);
1293 if (ops->get_rxfh_key_size)
1294 dev_key_size = ops->get_rxfh_key_size(dev);
1295
1296 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1297 return -EFAULT;
1298
1299 /* Check that reserved fields are 0 for now */
1300 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32)
1301 return -EINVAL;
1302 /* Most drivers don't handle rss_context, check it's 0 as well */
1303 if (rxfh.rss_context && !ops->cap_rss_ctx_supported)
1304 return -EOPNOTSUPP;
1305 /* Check input data transformation capabilities */
1306 if (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_SYM_XOR &&
1307 rxfh.input_xfrm != RXH_XFRM_NO_CHANGE)
1308 return -EINVAL;
1309 if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
1310 !ops->cap_rss_sym_xor_supported)
1311 return -EOPNOTSUPP;
1312
1313 /* If either indir, hash key or function is valid, proceed further.
1314 * Must request at least one change: indir size, hash key, function
1315 * or input transformation.
1316 */
1317 if ((rxfh.indir_size &&
1318 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1319 rxfh.indir_size != dev_indir_size) ||
1320 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1321 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1322 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE &&
1323 rxfh.input_xfrm == RXH_XFRM_NO_CHANGE))
1324 return -EINVAL;
1325
1326 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1327 indir_bytes = dev_indir_size * sizeof(rxfh_dev.indir[0]);
1328
1329 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1330 if (!rss_config)
1331 return -ENOMEM;
1332
1333 rx_rings.cmd = ETHTOOL_GRXRINGS;
1334 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1335 if (ret)
1336 goto out;
1337
1338 /* rxfh.indir_size == 0 means reset the indir table to default (master
1339 * context) or delete the context (other RSS contexts).
1340 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1341 */
1342 if (rxfh.indir_size &&
1343 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1344 rxfh_dev.indir = (u32 *)rss_config;
1345 rxfh_dev.indir_size = dev_indir_size;
1346 ret = ethtool_copy_validate_indir(rxfh_dev.indir,
1347 useraddr + rss_cfg_offset,
1348 &rx_rings,
1349 rxfh.indir_size);
1350 if (ret)
1351 goto out;
1352 } else if (rxfh.indir_size == 0) {
1353 if (rxfh.rss_context == 0) {
1354 u32 *indir;
1355
1356 rxfh_dev.indir = (u32 *)rss_config;
1357 rxfh_dev.indir_size = dev_indir_size;
1358 indir = rxfh_dev.indir;
1359 for (i = 0; i < dev_indir_size; i++)
1360 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1361 } else {
1362 rxfh_dev.rss_delete = true;
1363 }
1364 }
1365
1366 if (rxfh.key_size) {
1367 rxfh_dev.key_size = dev_key_size;
1368 rxfh_dev.key = rss_config + indir_bytes;
1369 if (copy_from_user(rxfh_dev.key,
1370 useraddr + rss_cfg_offset + indir_bytes,
1371 rxfh.key_size)) {
1372 ret = -EFAULT;
1373 goto out;
1374 }
1375 }
1376
1377 rxfh_dev.hfunc = rxfh.hfunc;
1378 rxfh_dev.rss_context = rxfh.rss_context;
1379 rxfh_dev.input_xfrm = rxfh.input_xfrm;
1380
1381 ret = ops->set_rxfh(dev, &rxfh_dev, extack);
1382 if (ret)
1383 goto out;
1384
1385 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1386 &rxfh_dev.rss_context, sizeof(rxfh_dev.rss_context)))
1387 ret = -EFAULT;
1388
1389 if (!rxfh_dev.rss_context) {
1390 /* indicate whether rxfh was set to default */
1391 if (rxfh.indir_size == 0)
1392 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1393 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1394 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1395 }
1396
1397out:
1398 kfree(rss_config);
1399 return ret;
1400}
1401
1402static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1403{
1404 struct ethtool_regs regs;
1405 const struct ethtool_ops *ops = dev->ethtool_ops;
1406 void *regbuf;
1407 int reglen, ret;
1408
1409 if (!ops->get_regs || !ops->get_regs_len)
1410 return -EOPNOTSUPP;
1411
1412 if (copy_from_user(®s, useraddr, sizeof(regs)))
1413 return -EFAULT;
1414
1415 reglen = ops->get_regs_len(dev);
1416 if (reglen <= 0)
1417 return reglen;
1418
1419 if (regs.len > reglen)
1420 regs.len = reglen;
1421
1422 regbuf = vzalloc(reglen);
1423 if (!regbuf)
1424 return -ENOMEM;
1425
1426 if (regs.len < reglen)
1427 reglen = regs.len;
1428
1429 ops->get_regs(dev, ®s, regbuf);
1430
1431 ret = -EFAULT;
1432 if (copy_to_user(useraddr, ®s, sizeof(regs)))
1433 goto out;
1434 useraddr += offsetof(struct ethtool_regs, data);
1435 if (copy_to_user(useraddr, regbuf, reglen))
1436 goto out;
1437 ret = 0;
1438
1439 out:
1440 vfree(regbuf);
1441 return ret;
1442}
1443
1444static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1445{
1446 struct ethtool_value reset;
1447 int ret;
1448
1449 if (!dev->ethtool_ops->reset)
1450 return -EOPNOTSUPP;
1451
1452 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1453 return -EFAULT;
1454
1455 ret = dev->ethtool_ops->reset(dev, &reset.data);
1456 if (ret)
1457 return ret;
1458
1459 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1460 return -EFAULT;
1461 return 0;
1462}
1463
1464static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1465{
1466 struct ethtool_wolinfo wol;
1467
1468 if (!dev->ethtool_ops->get_wol)
1469 return -EOPNOTSUPP;
1470
1471 memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1472 wol.cmd = ETHTOOL_GWOL;
1473 dev->ethtool_ops->get_wol(dev, &wol);
1474
1475 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1476 return -EFAULT;
1477 return 0;
1478}
1479
1480static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1481{
1482 struct ethtool_wolinfo wol, cur_wol;
1483 int ret;
1484
1485 if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol)
1486 return -EOPNOTSUPP;
1487
1488 memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo));
1489 cur_wol.cmd = ETHTOOL_GWOL;
1490 dev->ethtool_ops->get_wol(dev, &cur_wol);
1491
1492 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1493 return -EFAULT;
1494
1495 if (wol.wolopts & ~cur_wol.supported)
1496 return -EINVAL;
1497
1498 if (wol.wolopts == cur_wol.wolopts &&
1499 !memcmp(wol.sopass, cur_wol.sopass, sizeof(wol.sopass)))
1500 return 0;
1501
1502 ret = dev->ethtool_ops->set_wol(dev, &wol);
1503 if (ret)
1504 return ret;
1505
1506 dev->wol_enabled = !!wol.wolopts;
1507 ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL);
1508
1509 return 0;
1510}
1511
1512static void eee_to_keee(struct ethtool_keee *keee,
1513 const struct ethtool_eee *eee)
1514{
1515 memset(keee, 0, sizeof(*keee));
1516
1517 keee->eee_enabled = eee->eee_enabled;
1518 keee->tx_lpi_enabled = eee->tx_lpi_enabled;
1519 keee->tx_lpi_timer = eee->tx_lpi_timer;
1520
1521 ethtool_convert_legacy_u32_to_link_mode(keee->advertised,
1522 eee->advertised);
1523}
1524
1525static void keee_to_eee(struct ethtool_eee *eee,
1526 const struct ethtool_keee *keee)
1527{
1528 bool overflow;
1529
1530 memset(eee, 0, sizeof(*eee));
1531
1532 eee->eee_active = keee->eee_active;
1533 eee->eee_enabled = keee->eee_enabled;
1534 eee->tx_lpi_enabled = keee->tx_lpi_enabled;
1535 eee->tx_lpi_timer = keee->tx_lpi_timer;
1536
1537 overflow = !ethtool_convert_link_mode_to_legacy_u32(&eee->supported,
1538 keee->supported);
1539 ethtool_convert_link_mode_to_legacy_u32(&eee->advertised,
1540 keee->advertised);
1541 ethtool_convert_link_mode_to_legacy_u32(&eee->lp_advertised,
1542 keee->lp_advertised);
1543 if (overflow)
1544 pr_warn("Ethtool ioctl interface doesn't support passing EEE linkmodes beyond bit 32\n");
1545}
1546
1547static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1548{
1549 struct ethtool_keee keee;
1550 struct ethtool_eee eee;
1551 int rc;
1552
1553 if (!dev->ethtool_ops->get_eee)
1554 return -EOPNOTSUPP;
1555
1556 memset(&keee, 0, sizeof(keee));
1557 rc = dev->ethtool_ops->get_eee(dev, &keee);
1558 if (rc)
1559 return rc;
1560
1561 keee_to_eee(&eee, &keee);
1562 if (copy_to_user(useraddr, &eee, sizeof(eee)))
1563 return -EFAULT;
1564
1565 return 0;
1566}
1567
1568static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1569{
1570 struct ethtool_keee keee;
1571 struct ethtool_eee eee;
1572 int ret;
1573
1574 if (!dev->ethtool_ops->set_eee)
1575 return -EOPNOTSUPP;
1576
1577 if (copy_from_user(&eee, useraddr, sizeof(eee)))
1578 return -EFAULT;
1579
1580 eee_to_keee(&keee, &eee);
1581 ret = dev->ethtool_ops->set_eee(dev, &keee);
1582 if (!ret)
1583 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL);
1584 return ret;
1585}
1586
1587static int ethtool_nway_reset(struct net_device *dev)
1588{
1589 if (!dev->ethtool_ops->nway_reset)
1590 return -EOPNOTSUPP;
1591
1592 return dev->ethtool_ops->nway_reset(dev);
1593}
1594
1595static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1596{
1597 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1598 int link = __ethtool_get_link(dev);
1599
1600 if (link < 0)
1601 return link;
1602
1603 edata.data = link;
1604 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1605 return -EFAULT;
1606 return 0;
1607}
1608
1609static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1610 int (*getter)(struct net_device *,
1611 struct ethtool_eeprom *, u8 *),
1612 u32 total_len)
1613{
1614 struct ethtool_eeprom eeprom;
1615 void __user *userbuf = useraddr + sizeof(eeprom);
1616 u32 bytes_remaining;
1617 u8 *data;
1618 int ret = 0;
1619
1620 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1621 return -EFAULT;
1622
1623 /* Check for wrap and zero */
1624 if (eeprom.offset + eeprom.len <= eeprom.offset)
1625 return -EINVAL;
1626
1627 /* Check for exceeding total eeprom len */
1628 if (eeprom.offset + eeprom.len > total_len)
1629 return -EINVAL;
1630
1631 data = kzalloc(PAGE_SIZE, GFP_USER);
1632 if (!data)
1633 return -ENOMEM;
1634
1635 bytes_remaining = eeprom.len;
1636 while (bytes_remaining > 0) {
1637 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1638
1639 ret = getter(dev, &eeprom, data);
1640 if (ret)
1641 break;
1642 if (!eeprom.len) {
1643 ret = -EIO;
1644 break;
1645 }
1646 if (copy_to_user(userbuf, data, eeprom.len)) {
1647 ret = -EFAULT;
1648 break;
1649 }
1650 userbuf += eeprom.len;
1651 eeprom.offset += eeprom.len;
1652 bytes_remaining -= eeprom.len;
1653 }
1654
1655 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1656 eeprom.offset -= eeprom.len;
1657 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1658 ret = -EFAULT;
1659
1660 kfree(data);
1661 return ret;
1662}
1663
1664static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1665{
1666 const struct ethtool_ops *ops = dev->ethtool_ops;
1667
1668 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1669 !ops->get_eeprom_len(dev))
1670 return -EOPNOTSUPP;
1671
1672 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1673 ops->get_eeprom_len(dev));
1674}
1675
1676static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1677{
1678 struct ethtool_eeprom eeprom;
1679 const struct ethtool_ops *ops = dev->ethtool_ops;
1680 void __user *userbuf = useraddr + sizeof(eeprom);
1681 u32 bytes_remaining;
1682 u8 *data;
1683 int ret = 0;
1684
1685 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1686 !ops->get_eeprom_len(dev))
1687 return -EOPNOTSUPP;
1688
1689 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1690 return -EFAULT;
1691
1692 /* Check for wrap and zero */
1693 if (eeprom.offset + eeprom.len <= eeprom.offset)
1694 return -EINVAL;
1695
1696 /* Check for exceeding total eeprom len */
1697 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1698 return -EINVAL;
1699
1700 data = kzalloc(PAGE_SIZE, GFP_USER);
1701 if (!data)
1702 return -ENOMEM;
1703
1704 bytes_remaining = eeprom.len;
1705 while (bytes_remaining > 0) {
1706 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1707
1708 if (copy_from_user(data, userbuf, eeprom.len)) {
1709 ret = -EFAULT;
1710 break;
1711 }
1712 ret = ops->set_eeprom(dev, &eeprom, data);
1713 if (ret)
1714 break;
1715 userbuf += eeprom.len;
1716 eeprom.offset += eeprom.len;
1717 bytes_remaining -= eeprom.len;
1718 }
1719
1720 kfree(data);
1721 return ret;
1722}
1723
1724static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1725 void __user *useraddr)
1726{
1727 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1728 struct kernel_ethtool_coalesce kernel_coalesce = {};
1729 int ret;
1730
1731 if (!dev->ethtool_ops->get_coalesce)
1732 return -EOPNOTSUPP;
1733
1734 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1735 NULL);
1736 if (ret)
1737 return ret;
1738
1739 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1740 return -EFAULT;
1741 return 0;
1742}
1743
1744static bool
1745ethtool_set_coalesce_supported(struct net_device *dev,
1746 struct ethtool_coalesce *coalesce)
1747{
1748 u32 supported_params = dev->ethtool_ops->supported_coalesce_params;
1749 u32 nonzero_params = 0;
1750
1751 if (coalesce->rx_coalesce_usecs)
1752 nonzero_params |= ETHTOOL_COALESCE_RX_USECS;
1753 if (coalesce->rx_max_coalesced_frames)
1754 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES;
1755 if (coalesce->rx_coalesce_usecs_irq)
1756 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ;
1757 if (coalesce->rx_max_coalesced_frames_irq)
1758 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ;
1759 if (coalesce->tx_coalesce_usecs)
1760 nonzero_params |= ETHTOOL_COALESCE_TX_USECS;
1761 if (coalesce->tx_max_coalesced_frames)
1762 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES;
1763 if (coalesce->tx_coalesce_usecs_irq)
1764 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ;
1765 if (coalesce->tx_max_coalesced_frames_irq)
1766 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ;
1767 if (coalesce->stats_block_coalesce_usecs)
1768 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS;
1769 if (coalesce->use_adaptive_rx_coalesce)
1770 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX;
1771 if (coalesce->use_adaptive_tx_coalesce)
1772 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX;
1773 if (coalesce->pkt_rate_low)
1774 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW;
1775 if (coalesce->rx_coalesce_usecs_low)
1776 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW;
1777 if (coalesce->rx_max_coalesced_frames_low)
1778 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW;
1779 if (coalesce->tx_coalesce_usecs_low)
1780 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW;
1781 if (coalesce->tx_max_coalesced_frames_low)
1782 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW;
1783 if (coalesce->pkt_rate_high)
1784 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH;
1785 if (coalesce->rx_coalesce_usecs_high)
1786 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH;
1787 if (coalesce->rx_max_coalesced_frames_high)
1788 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH;
1789 if (coalesce->tx_coalesce_usecs_high)
1790 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH;
1791 if (coalesce->tx_max_coalesced_frames_high)
1792 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH;
1793 if (coalesce->rate_sample_interval)
1794 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL;
1795
1796 return (supported_params & nonzero_params) == nonzero_params;
1797}
1798
1799static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1800 void __user *useraddr)
1801{
1802 struct kernel_ethtool_coalesce kernel_coalesce = {};
1803 struct ethtool_coalesce coalesce;
1804 int ret;
1805
1806 if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce)
1807 return -EOPNOTSUPP;
1808
1809 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
1810 NULL);
1811 if (ret)
1812 return ret;
1813
1814 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1815 return -EFAULT;
1816
1817 if (!ethtool_set_coalesce_supported(dev, &coalesce))
1818 return -EOPNOTSUPP;
1819
1820 ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
1821 NULL);
1822 if (!ret)
1823 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL);
1824 return ret;
1825}
1826
1827static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1828{
1829 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1830 struct kernel_ethtool_ringparam kernel_ringparam = {};
1831
1832 if (!dev->ethtool_ops->get_ringparam)
1833 return -EOPNOTSUPP;
1834
1835 dev->ethtool_ops->get_ringparam(dev, &ringparam,
1836 &kernel_ringparam, NULL);
1837
1838 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1839 return -EFAULT;
1840 return 0;
1841}
1842
1843static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1844{
1845 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1846 struct kernel_ethtool_ringparam kernel_ringparam;
1847 int ret;
1848
1849 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1850 return -EOPNOTSUPP;
1851
1852 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1853 return -EFAULT;
1854
1855 dev->ethtool_ops->get_ringparam(dev, &max, &kernel_ringparam, NULL);
1856
1857 /* ensure new ring parameters are within the maximums */
1858 if (ringparam.rx_pending > max.rx_max_pending ||
1859 ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1860 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1861 ringparam.tx_pending > max.tx_max_pending)
1862 return -EINVAL;
1863
1864 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam,
1865 &kernel_ringparam, NULL);
1866 if (!ret)
1867 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
1868 return ret;
1869}
1870
1871static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1872 void __user *useraddr)
1873{
1874 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1875
1876 if (!dev->ethtool_ops->get_channels)
1877 return -EOPNOTSUPP;
1878
1879 dev->ethtool_ops->get_channels(dev, &channels);
1880
1881 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1882 return -EFAULT;
1883 return 0;
1884}
1885
1886static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1887 void __user *useraddr)
1888{
1889 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1890 u16 from_channel, to_channel;
1891 u64 max_rxnfc_in_use;
1892 u32 max_rxfh_in_use;
1893 unsigned int i;
1894 int ret;
1895
1896 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1897 return -EOPNOTSUPP;
1898
1899 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1900 return -EFAULT;
1901
1902 dev->ethtool_ops->get_channels(dev, &curr);
1903
1904 if (channels.rx_count == curr.rx_count &&
1905 channels.tx_count == curr.tx_count &&
1906 channels.combined_count == curr.combined_count &&
1907 channels.other_count == curr.other_count)
1908 return 0;
1909
1910 /* ensure new counts are within the maximums */
1911 if (channels.rx_count > curr.max_rx ||
1912 channels.tx_count > curr.max_tx ||
1913 channels.combined_count > curr.max_combined ||
1914 channels.other_count > curr.max_other)
1915 return -EINVAL;
1916
1917 /* ensure there is at least one RX and one TX channel */
1918 if (!channels.combined_count &&
1919 (!channels.rx_count || !channels.tx_count))
1920 return -EINVAL;
1921
1922 /* ensure the new Rx count fits within the configured Rx flow
1923 * indirection table/rxnfc settings */
1924 if (ethtool_get_max_rxnfc_channel(dev, &max_rxnfc_in_use))
1925 max_rxnfc_in_use = 0;
1926 if (!netif_is_rxfh_configured(dev) ||
1927 ethtool_get_max_rxfh_channel(dev, &max_rxfh_in_use))
1928 max_rxfh_in_use = 0;
1929 if (channels.combined_count + channels.rx_count <=
1930 max_t(u64, max_rxnfc_in_use, max_rxfh_in_use))
1931 return -EINVAL;
1932
1933 /* Disabling channels, query zero-copy AF_XDP sockets */
1934 from_channel = channels.combined_count +
1935 min(channels.rx_count, channels.tx_count);
1936 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1937 for (i = from_channel; i < to_channel; i++)
1938 if (xsk_get_pool_from_qid(dev, i))
1939 return -EINVAL;
1940
1941 ret = dev->ethtool_ops->set_channels(dev, &channels);
1942 if (!ret)
1943 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
1944 return ret;
1945}
1946
1947static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1948{
1949 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1950
1951 if (!dev->ethtool_ops->get_pauseparam)
1952 return -EOPNOTSUPP;
1953
1954 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1955
1956 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1957 return -EFAULT;
1958 return 0;
1959}
1960
1961static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1962{
1963 struct ethtool_pauseparam pauseparam;
1964 int ret;
1965
1966 if (!dev->ethtool_ops->set_pauseparam)
1967 return -EOPNOTSUPP;
1968
1969 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1970 return -EFAULT;
1971
1972 ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1973 if (!ret)
1974 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL);
1975 return ret;
1976}
1977
1978static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1979{
1980 struct ethtool_test test;
1981 const struct ethtool_ops *ops = dev->ethtool_ops;
1982 u64 *data;
1983 int ret, test_len;
1984
1985 if (!ops->self_test || !ops->get_sset_count)
1986 return -EOPNOTSUPP;
1987
1988 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1989 if (test_len < 0)
1990 return test_len;
1991 WARN_ON(test_len == 0);
1992
1993 if (copy_from_user(&test, useraddr, sizeof(test)))
1994 return -EFAULT;
1995
1996 test.len = test_len;
1997 data = kcalloc(test_len, sizeof(u64), GFP_USER);
1998 if (!data)
1999 return -ENOMEM;
2000
2001 netif_testing_on(dev);
2002 ops->self_test(dev, &test, data);
2003 netif_testing_off(dev);
2004
2005 ret = -EFAULT;
2006 if (copy_to_user(useraddr, &test, sizeof(test)))
2007 goto out;
2008 useraddr += sizeof(test);
2009 if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64))))
2010 goto out;
2011 ret = 0;
2012
2013 out:
2014 kfree(data);
2015 return ret;
2016}
2017
2018static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
2019{
2020 struct ethtool_gstrings gstrings;
2021 u8 *data;
2022 int ret;
2023
2024 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
2025 return -EFAULT;
2026
2027 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
2028 if (ret < 0)
2029 return ret;
2030 if (ret > S32_MAX / ETH_GSTRING_LEN)
2031 return -ENOMEM;
2032 WARN_ON_ONCE(!ret);
2033
2034 gstrings.len = ret;
2035
2036 if (gstrings.len) {
2037 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
2038 if (!data)
2039 return -ENOMEM;
2040
2041 __ethtool_get_strings(dev, gstrings.string_set, data);
2042 } else {
2043 data = NULL;
2044 }
2045
2046 ret = -EFAULT;
2047 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
2048 goto out;
2049 useraddr += sizeof(gstrings);
2050 if (gstrings.len &&
2051 copy_to_user(useraddr, data,
2052 array_size(gstrings.len, ETH_GSTRING_LEN)))
2053 goto out;
2054 ret = 0;
2055
2056out:
2057 vfree(data);
2058 return ret;
2059}
2060
2061__printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
2062{
2063 va_list args;
2064
2065 va_start(args, fmt);
2066 vsnprintf(*data, ETH_GSTRING_LEN, fmt, args);
2067 va_end(args);
2068
2069 *data += ETH_GSTRING_LEN;
2070}
2071EXPORT_SYMBOL(ethtool_sprintf);
2072
2073void ethtool_puts(u8 **data, const char *str)
2074{
2075 strscpy(*data, str, ETH_GSTRING_LEN);
2076 *data += ETH_GSTRING_LEN;
2077}
2078EXPORT_SYMBOL(ethtool_puts);
2079
2080static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
2081{
2082 struct ethtool_value id;
2083 static bool busy;
2084 const struct ethtool_ops *ops = dev->ethtool_ops;
2085 netdevice_tracker dev_tracker;
2086 int rc;
2087
2088 if (!ops->set_phys_id)
2089 return -EOPNOTSUPP;
2090
2091 if (busy)
2092 return -EBUSY;
2093
2094 if (copy_from_user(&id, useraddr, sizeof(id)))
2095 return -EFAULT;
2096
2097 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
2098 if (rc < 0)
2099 return rc;
2100
2101 /* Drop the RTNL lock while waiting, but prevent reentry or
2102 * removal of the device.
2103 */
2104 busy = true;
2105 netdev_hold(dev, &dev_tracker, GFP_KERNEL);
2106 rtnl_unlock();
2107
2108 if (rc == 0) {
2109 /* Driver will handle this itself */
2110 schedule_timeout_interruptible(
2111 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
2112 } else {
2113 /* Driver expects to be called at twice the frequency in rc */
2114 int n = rc * 2, interval = HZ / n;
2115 u64 count = mul_u32_u32(n, id.data);
2116 u64 i = 0;
2117
2118 do {
2119 rtnl_lock();
2120 rc = ops->set_phys_id(dev,
2121 (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
2122 rtnl_unlock();
2123 if (rc)
2124 break;
2125 schedule_timeout_interruptible(interval);
2126 } while (!signal_pending(current) && (!id.data || i < count));
2127 }
2128
2129 rtnl_lock();
2130 netdev_put(dev, &dev_tracker);
2131 busy = false;
2132
2133 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
2134 return rc;
2135}
2136
2137static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
2138{
2139 struct ethtool_stats stats;
2140 const struct ethtool_ops *ops = dev->ethtool_ops;
2141 u64 *data;
2142 int ret, n_stats;
2143
2144 if (!ops->get_ethtool_stats || !ops->get_sset_count)
2145 return -EOPNOTSUPP;
2146
2147 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
2148 if (n_stats < 0)
2149 return n_stats;
2150 if (n_stats > S32_MAX / sizeof(u64))
2151 return -ENOMEM;
2152 WARN_ON_ONCE(!n_stats);
2153 if (copy_from_user(&stats, useraddr, sizeof(stats)))
2154 return -EFAULT;
2155
2156 stats.n_stats = n_stats;
2157
2158 if (n_stats) {
2159 data = vzalloc(array_size(n_stats, sizeof(u64)));
2160 if (!data)
2161 return -ENOMEM;
2162 ops->get_ethtool_stats(dev, &stats, data);
2163 } else {
2164 data = NULL;
2165 }
2166
2167 ret = -EFAULT;
2168 if (copy_to_user(useraddr, &stats, sizeof(stats)))
2169 goto out;
2170 useraddr += sizeof(stats);
2171 if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64))))
2172 goto out;
2173 ret = 0;
2174
2175 out:
2176 vfree(data);
2177 return ret;
2178}
2179
2180static int ethtool_vzalloc_stats_array(int n_stats, u64 **data)
2181{
2182 if (n_stats < 0)
2183 return n_stats;
2184 if (n_stats > S32_MAX / sizeof(u64))
2185 return -ENOMEM;
2186 if (WARN_ON_ONCE(!n_stats))
2187 return -EOPNOTSUPP;
2188
2189 *data = vzalloc(array_size(n_stats, sizeof(u64)));
2190 if (!*data)
2191 return -ENOMEM;
2192
2193 return 0;
2194}
2195
2196static int ethtool_get_phy_stats_phydev(struct phy_device *phydev,
2197 struct ethtool_stats *stats,
2198 u64 **data)
2199 {
2200 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops;
2201 int n_stats, ret;
2202
2203 if (!phy_ops || !phy_ops->get_sset_count || !phy_ops->get_stats)
2204 return -EOPNOTSUPP;
2205
2206 n_stats = phy_ops->get_sset_count(phydev);
2207
2208 ret = ethtool_vzalloc_stats_array(n_stats, data);
2209 if (ret)
2210 return ret;
2211
2212 stats->n_stats = n_stats;
2213 return phy_ops->get_stats(phydev, stats, *data);
2214}
2215
2216static int ethtool_get_phy_stats_ethtool(struct net_device *dev,
2217 struct ethtool_stats *stats,
2218 u64 **data)
2219{
2220 const struct ethtool_ops *ops = dev->ethtool_ops;
2221 int n_stats, ret;
2222
2223 if (!ops || !ops->get_sset_count || ops->get_ethtool_phy_stats)
2224 return -EOPNOTSUPP;
2225
2226 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
2227
2228 ret = ethtool_vzalloc_stats_array(n_stats, data);
2229 if (ret)
2230 return ret;
2231
2232 stats->n_stats = n_stats;
2233 ops->get_ethtool_phy_stats(dev, stats, *data);
2234
2235 return 0;
2236}
2237
2238static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
2239{
2240 struct phy_device *phydev = dev->phydev;
2241 struct ethtool_stats stats;
2242 u64 *data = NULL;
2243 int ret = -EOPNOTSUPP;
2244
2245 if (copy_from_user(&stats, useraddr, sizeof(stats)))
2246 return -EFAULT;
2247
2248 if (phydev)
2249 ret = ethtool_get_phy_stats_phydev(phydev, &stats, &data);
2250
2251 if (ret == -EOPNOTSUPP)
2252 ret = ethtool_get_phy_stats_ethtool(dev, &stats, &data);
2253
2254 if (ret)
2255 goto out;
2256
2257 if (copy_to_user(useraddr, &stats, sizeof(stats))) {
2258 ret = -EFAULT;
2259 goto out;
2260 }
2261
2262 useraddr += sizeof(stats);
2263 if (copy_to_user(useraddr, data, array_size(stats.n_stats, sizeof(u64))))
2264 ret = -EFAULT;
2265
2266 out:
2267 vfree(data);
2268 return ret;
2269}
2270
2271static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
2272{
2273 struct ethtool_perm_addr epaddr;
2274
2275 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
2276 return -EFAULT;
2277
2278 if (epaddr.size < dev->addr_len)
2279 return -ETOOSMALL;
2280 epaddr.size = dev->addr_len;
2281
2282 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2283 return -EFAULT;
2284 useraddr += sizeof(epaddr);
2285 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2286 return -EFAULT;
2287 return 0;
2288}
2289
2290static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2291 u32 cmd, u32 (*actor)(struct net_device *))
2292{
2293 struct ethtool_value edata = { .cmd = cmd };
2294
2295 if (!actor)
2296 return -EOPNOTSUPP;
2297
2298 edata.data = actor(dev);
2299
2300 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2301 return -EFAULT;
2302 return 0;
2303}
2304
2305static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2306 void (*actor)(struct net_device *, u32))
2307{
2308 struct ethtool_value edata;
2309
2310 if (!actor)
2311 return -EOPNOTSUPP;
2312
2313 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2314 return -EFAULT;
2315
2316 actor(dev, edata.data);
2317 return 0;
2318}
2319
2320static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2321 int (*actor)(struct net_device *, u32))
2322{
2323 struct ethtool_value edata;
2324
2325 if (!actor)
2326 return -EOPNOTSUPP;
2327
2328 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2329 return -EFAULT;
2330
2331 return actor(dev, edata.data);
2332}
2333
2334static int
2335ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req)
2336{
2337 if (!dev->ethtool_ops->flash_device) {
2338 req->devlink = netdev_to_devlink_get(dev);
2339 return 0;
2340 }
2341
2342 return dev->ethtool_ops->flash_device(dev, &req->efl);
2343}
2344
2345static int ethtool_set_dump(struct net_device *dev,
2346 void __user *useraddr)
2347{
2348 struct ethtool_dump dump;
2349
2350 if (!dev->ethtool_ops->set_dump)
2351 return -EOPNOTSUPP;
2352
2353 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2354 return -EFAULT;
2355
2356 return dev->ethtool_ops->set_dump(dev, &dump);
2357}
2358
2359static int ethtool_get_dump_flag(struct net_device *dev,
2360 void __user *useraddr)
2361{
2362 int ret;
2363 struct ethtool_dump dump;
2364 const struct ethtool_ops *ops = dev->ethtool_ops;
2365
2366 if (!ops->get_dump_flag)
2367 return -EOPNOTSUPP;
2368
2369 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2370 return -EFAULT;
2371
2372 ret = ops->get_dump_flag(dev, &dump);
2373 if (ret)
2374 return ret;
2375
2376 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2377 return -EFAULT;
2378 return 0;
2379}
2380
2381static int ethtool_get_dump_data(struct net_device *dev,
2382 void __user *useraddr)
2383{
2384 int ret;
2385 __u32 len;
2386 struct ethtool_dump dump, tmp;
2387 const struct ethtool_ops *ops = dev->ethtool_ops;
2388 void *data = NULL;
2389
2390 if (!ops->get_dump_data || !ops->get_dump_flag)
2391 return -EOPNOTSUPP;
2392
2393 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2394 return -EFAULT;
2395
2396 memset(&tmp, 0, sizeof(tmp));
2397 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2398 ret = ops->get_dump_flag(dev, &tmp);
2399 if (ret)
2400 return ret;
2401
2402 len = min(tmp.len, dump.len);
2403 if (!len)
2404 return -EFAULT;
2405
2406 /* Don't ever let the driver think there's more space available
2407 * than it requested with .get_dump_flag().
2408 */
2409 dump.len = len;
2410
2411 /* Always allocate enough space to hold the whole thing so that the
2412 * driver does not need to check the length and bother with partial
2413 * dumping.
2414 */
2415 data = vzalloc(tmp.len);
2416 if (!data)
2417 return -ENOMEM;
2418 ret = ops->get_dump_data(dev, &dump, data);
2419 if (ret)
2420 goto out;
2421
2422 /* There are two sane possibilities:
2423 * 1. The driver's .get_dump_data() does not touch dump.len.
2424 * 2. Or it may set dump.len to how much it really writes, which
2425 * should be tmp.len (or len if it can do a partial dump).
2426 * In any case respond to userspace with the actual length of data
2427 * it's receiving.
2428 */
2429 WARN_ON(dump.len != len && dump.len != tmp.len);
2430 dump.len = len;
2431
2432 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2433 ret = -EFAULT;
2434 goto out;
2435 }
2436 useraddr += offsetof(struct ethtool_dump, data);
2437 if (copy_to_user(useraddr, data, len))
2438 ret = -EFAULT;
2439out:
2440 vfree(data);
2441 return ret;
2442}
2443
2444static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2445{
2446 struct ethtool_ts_info info;
2447 int err;
2448
2449 err = __ethtool_get_ts_info(dev, &info);
2450 if (err)
2451 return err;
2452
2453 if (copy_to_user(useraddr, &info, sizeof(info)))
2454 return -EFAULT;
2455
2456 return 0;
2457}
2458
2459int ethtool_get_module_info_call(struct net_device *dev,
2460 struct ethtool_modinfo *modinfo)
2461{
2462 const struct ethtool_ops *ops = dev->ethtool_ops;
2463 struct phy_device *phydev = dev->phydev;
2464
2465 if (dev->sfp_bus)
2466 return sfp_get_module_info(dev->sfp_bus, modinfo);
2467
2468 if (phydev && phydev->drv && phydev->drv->module_info)
2469 return phydev->drv->module_info(phydev, modinfo);
2470
2471 if (ops->get_module_info)
2472 return ops->get_module_info(dev, modinfo);
2473
2474 return -EOPNOTSUPP;
2475}
2476
2477static int ethtool_get_module_info(struct net_device *dev,
2478 void __user *useraddr)
2479{
2480 int ret;
2481 struct ethtool_modinfo modinfo;
2482
2483 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2484 return -EFAULT;
2485
2486 ret = ethtool_get_module_info_call(dev, &modinfo);
2487 if (ret)
2488 return ret;
2489
2490 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2491 return -EFAULT;
2492
2493 return 0;
2494}
2495
2496int ethtool_get_module_eeprom_call(struct net_device *dev,
2497 struct ethtool_eeprom *ee, u8 *data)
2498{
2499 const struct ethtool_ops *ops = dev->ethtool_ops;
2500 struct phy_device *phydev = dev->phydev;
2501
2502 if (dev->sfp_bus)
2503 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2504
2505 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2506 return phydev->drv->module_eeprom(phydev, ee, data);
2507
2508 if (ops->get_module_eeprom)
2509 return ops->get_module_eeprom(dev, ee, data);
2510
2511 return -EOPNOTSUPP;
2512}
2513
2514static int ethtool_get_module_eeprom(struct net_device *dev,
2515 void __user *useraddr)
2516{
2517 int ret;
2518 struct ethtool_modinfo modinfo;
2519
2520 ret = ethtool_get_module_info_call(dev, &modinfo);
2521 if (ret)
2522 return ret;
2523
2524 return ethtool_get_any_eeprom(dev, useraddr,
2525 ethtool_get_module_eeprom_call,
2526 modinfo.eeprom_len);
2527}
2528
2529static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2530{
2531 switch (tuna->id) {
2532 case ETHTOOL_RX_COPYBREAK:
2533 case ETHTOOL_TX_COPYBREAK:
2534 case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
2535 if (tuna->len != sizeof(u32) ||
2536 tuna->type_id != ETHTOOL_TUNABLE_U32)
2537 return -EINVAL;
2538 break;
2539 case ETHTOOL_PFC_PREVENTION_TOUT:
2540 if (tuna->len != sizeof(u16) ||
2541 tuna->type_id != ETHTOOL_TUNABLE_U16)
2542 return -EINVAL;
2543 break;
2544 default:
2545 return -EINVAL;
2546 }
2547
2548 return 0;
2549}
2550
2551static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2552{
2553 int ret;
2554 struct ethtool_tunable tuna;
2555 const struct ethtool_ops *ops = dev->ethtool_ops;
2556 void *data;
2557
2558 if (!ops->get_tunable)
2559 return -EOPNOTSUPP;
2560 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2561 return -EFAULT;
2562 ret = ethtool_tunable_valid(&tuna);
2563 if (ret)
2564 return ret;
2565 data = kzalloc(tuna.len, GFP_USER);
2566 if (!data)
2567 return -ENOMEM;
2568 ret = ops->get_tunable(dev, &tuna, data);
2569 if (ret)
2570 goto out;
2571 useraddr += sizeof(tuna);
2572 ret = -EFAULT;
2573 if (copy_to_user(useraddr, data, tuna.len))
2574 goto out;
2575 ret = 0;
2576
2577out:
2578 kfree(data);
2579 return ret;
2580}
2581
2582static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2583{
2584 int ret;
2585 struct ethtool_tunable tuna;
2586 const struct ethtool_ops *ops = dev->ethtool_ops;
2587 void *data;
2588
2589 if (!ops->set_tunable)
2590 return -EOPNOTSUPP;
2591 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2592 return -EFAULT;
2593 ret = ethtool_tunable_valid(&tuna);
2594 if (ret)
2595 return ret;
2596 useraddr += sizeof(tuna);
2597 data = memdup_user(useraddr, tuna.len);
2598 if (IS_ERR(data))
2599 return PTR_ERR(data);
2600 ret = ops->set_tunable(dev, &tuna, data);
2601
2602 kfree(data);
2603 return ret;
2604}
2605
2606static noinline_for_stack int
2607ethtool_get_per_queue_coalesce(struct net_device *dev,
2608 void __user *useraddr,
2609 struct ethtool_per_queue_op *per_queue_opt)
2610{
2611 u32 bit;
2612 int ret;
2613 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2614
2615 if (!dev->ethtool_ops->get_per_queue_coalesce)
2616 return -EOPNOTSUPP;
2617
2618 useraddr += sizeof(*per_queue_opt);
2619
2620 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2621 MAX_NUM_QUEUE);
2622
2623 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2624 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2625
2626 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2627 if (ret != 0)
2628 return ret;
2629 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2630 return -EFAULT;
2631 useraddr += sizeof(coalesce);
2632 }
2633
2634 return 0;
2635}
2636
2637static noinline_for_stack int
2638ethtool_set_per_queue_coalesce(struct net_device *dev,
2639 void __user *useraddr,
2640 struct ethtool_per_queue_op *per_queue_opt)
2641{
2642 u32 bit;
2643 int i, ret = 0;
2644 int n_queue;
2645 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2646 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2647
2648 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2649 (!dev->ethtool_ops->get_per_queue_coalesce))
2650 return -EOPNOTSUPP;
2651
2652 useraddr += sizeof(*per_queue_opt);
2653
2654 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2655 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2656 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2657 if (!backup)
2658 return -ENOMEM;
2659
2660 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2661 struct ethtool_coalesce coalesce;
2662
2663 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2664 if (ret != 0)
2665 goto roll_back;
2666
2667 tmp++;
2668
2669 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2670 ret = -EFAULT;
2671 goto roll_back;
2672 }
2673
2674 if (!ethtool_set_coalesce_supported(dev, &coalesce)) {
2675 ret = -EOPNOTSUPP;
2676 goto roll_back;
2677 }
2678
2679 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2680 if (ret != 0)
2681 goto roll_back;
2682
2683 useraddr += sizeof(coalesce);
2684 }
2685
2686roll_back:
2687 if (ret != 0) {
2688 tmp = backup;
2689 for_each_set_bit(i, queue_mask, bit) {
2690 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2691 tmp++;
2692 }
2693 }
2694 kfree(backup);
2695
2696 return ret;
2697}
2698
2699static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2700 void __user *useraddr, u32 sub_cmd)
2701{
2702 struct ethtool_per_queue_op per_queue_opt;
2703
2704 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2705 return -EFAULT;
2706
2707 if (per_queue_opt.sub_command != sub_cmd)
2708 return -EINVAL;
2709
2710 switch (per_queue_opt.sub_command) {
2711 case ETHTOOL_GCOALESCE:
2712 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2713 case ETHTOOL_SCOALESCE:
2714 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2715 default:
2716 return -EOPNOTSUPP;
2717 }
2718}
2719
2720static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2721{
2722 switch (tuna->id) {
2723 case ETHTOOL_PHY_DOWNSHIFT:
2724 case ETHTOOL_PHY_FAST_LINK_DOWN:
2725 if (tuna->len != sizeof(u8) ||
2726 tuna->type_id != ETHTOOL_TUNABLE_U8)
2727 return -EINVAL;
2728 break;
2729 case ETHTOOL_PHY_EDPD:
2730 if (tuna->len != sizeof(u16) ||
2731 tuna->type_id != ETHTOOL_TUNABLE_U16)
2732 return -EINVAL;
2733 break;
2734 default:
2735 return -EINVAL;
2736 }
2737
2738 return 0;
2739}
2740
2741static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2742{
2743 struct phy_device *phydev = dev->phydev;
2744 struct ethtool_tunable tuna;
2745 bool phy_drv_tunable;
2746 void *data;
2747 int ret;
2748
2749 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2750 if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable)
2751 return -EOPNOTSUPP;
2752 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2753 return -EFAULT;
2754 ret = ethtool_phy_tunable_valid(&tuna);
2755 if (ret)
2756 return ret;
2757 data = kzalloc(tuna.len, GFP_USER);
2758 if (!data)
2759 return -ENOMEM;
2760 if (phy_drv_tunable) {
2761 mutex_lock(&phydev->lock);
2762 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2763 mutex_unlock(&phydev->lock);
2764 } else {
2765 ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data);
2766 }
2767 if (ret)
2768 goto out;
2769 useraddr += sizeof(tuna);
2770 ret = -EFAULT;
2771 if (copy_to_user(useraddr, data, tuna.len))
2772 goto out;
2773 ret = 0;
2774
2775out:
2776 kfree(data);
2777 return ret;
2778}
2779
2780static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2781{
2782 struct phy_device *phydev = dev->phydev;
2783 struct ethtool_tunable tuna;
2784 bool phy_drv_tunable;
2785 void *data;
2786 int ret;
2787
2788 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable;
2789 if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable)
2790 return -EOPNOTSUPP;
2791 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2792 return -EFAULT;
2793 ret = ethtool_phy_tunable_valid(&tuna);
2794 if (ret)
2795 return ret;
2796 useraddr += sizeof(tuna);
2797 data = memdup_user(useraddr, tuna.len);
2798 if (IS_ERR(data))
2799 return PTR_ERR(data);
2800 if (phy_drv_tunable) {
2801 mutex_lock(&phydev->lock);
2802 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2803 mutex_unlock(&phydev->lock);
2804 } else {
2805 ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data);
2806 }
2807
2808 kfree(data);
2809 return ret;
2810}
2811
2812static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2813{
2814 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2815 int rc;
2816
2817 if (!dev->ethtool_ops->get_fecparam)
2818 return -EOPNOTSUPP;
2819
2820 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2821 if (rc)
2822 return rc;
2823
2824 if (WARN_ON_ONCE(fecparam.reserved))
2825 fecparam.reserved = 0;
2826
2827 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2828 return -EFAULT;
2829 return 0;
2830}
2831
2832static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2833{
2834 struct ethtool_fecparam fecparam;
2835
2836 if (!dev->ethtool_ops->set_fecparam)
2837 return -EOPNOTSUPP;
2838
2839 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2840 return -EFAULT;
2841
2842 if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE)
2843 return -EINVAL;
2844
2845 fecparam.active_fec = 0;
2846 fecparam.reserved = 0;
2847
2848 return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2849}
2850
2851/* The main entry point in this file. Called from net/core/dev_ioctl.c */
2852
2853static int
2854__dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr,
2855 u32 ethcmd, struct ethtool_devlink_compat *devlink_state)
2856{
2857 struct net_device *dev;
2858 u32 sub_cmd;
2859 int rc;
2860 netdev_features_t old_features;
2861
2862 dev = __dev_get_by_name(net, ifr->ifr_name);
2863 if (!dev)
2864 return -ENODEV;
2865
2866 if (ethcmd == ETHTOOL_PERQUEUE) {
2867 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2868 return -EFAULT;
2869 } else {
2870 sub_cmd = ethcmd;
2871 }
2872 /* Allow some commands to be done by anyone */
2873 switch (sub_cmd) {
2874 case ETHTOOL_GSET:
2875 case ETHTOOL_GDRVINFO:
2876 case ETHTOOL_GMSGLVL:
2877 case ETHTOOL_GLINK:
2878 case ETHTOOL_GCOALESCE:
2879 case ETHTOOL_GRINGPARAM:
2880 case ETHTOOL_GPAUSEPARAM:
2881 case ETHTOOL_GRXCSUM:
2882 case ETHTOOL_GTXCSUM:
2883 case ETHTOOL_GSG:
2884 case ETHTOOL_GSSET_INFO:
2885 case ETHTOOL_GSTRINGS:
2886 case ETHTOOL_GSTATS:
2887 case ETHTOOL_GPHYSTATS:
2888 case ETHTOOL_GTSO:
2889 case ETHTOOL_GPERMADDR:
2890 case ETHTOOL_GUFO:
2891 case ETHTOOL_GGSO:
2892 case ETHTOOL_GGRO:
2893 case ETHTOOL_GFLAGS:
2894 case ETHTOOL_GPFLAGS:
2895 case ETHTOOL_GRXFH:
2896 case ETHTOOL_GRXRINGS:
2897 case ETHTOOL_GRXCLSRLCNT:
2898 case ETHTOOL_GRXCLSRULE:
2899 case ETHTOOL_GRXCLSRLALL:
2900 case ETHTOOL_GRXFHINDIR:
2901 case ETHTOOL_GRSSH:
2902 case ETHTOOL_GFEATURES:
2903 case ETHTOOL_GCHANNELS:
2904 case ETHTOOL_GET_TS_INFO:
2905 case ETHTOOL_GEEE:
2906 case ETHTOOL_GTUNABLE:
2907 case ETHTOOL_PHY_GTUNABLE:
2908 case ETHTOOL_GLINKSETTINGS:
2909 case ETHTOOL_GFECPARAM:
2910 break;
2911 default:
2912 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2913 return -EPERM;
2914 }
2915
2916 if (dev->dev.parent)
2917 pm_runtime_get_sync(dev->dev.parent);
2918
2919 if (!netif_device_present(dev)) {
2920 rc = -ENODEV;
2921 goto out;
2922 }
2923
2924 if (dev->ethtool_ops->begin) {
2925 rc = dev->ethtool_ops->begin(dev);
2926 if (rc < 0)
2927 goto out;
2928 }
2929 old_features = dev->features;
2930
2931 switch (ethcmd) {
2932 case ETHTOOL_GSET:
2933 rc = ethtool_get_settings(dev, useraddr);
2934 break;
2935 case ETHTOOL_SSET:
2936 rc = ethtool_set_settings(dev, useraddr);
2937 break;
2938 case ETHTOOL_GDRVINFO:
2939 rc = ethtool_get_drvinfo(dev, devlink_state);
2940 break;
2941 case ETHTOOL_GREGS:
2942 rc = ethtool_get_regs(dev, useraddr);
2943 break;
2944 case ETHTOOL_GWOL:
2945 rc = ethtool_get_wol(dev, useraddr);
2946 break;
2947 case ETHTOOL_SWOL:
2948 rc = ethtool_set_wol(dev, useraddr);
2949 break;
2950 case ETHTOOL_GMSGLVL:
2951 rc = ethtool_get_value(dev, useraddr, ethcmd,
2952 dev->ethtool_ops->get_msglevel);
2953 break;
2954 case ETHTOOL_SMSGLVL:
2955 rc = ethtool_set_value_void(dev, useraddr,
2956 dev->ethtool_ops->set_msglevel);
2957 if (!rc)
2958 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL);
2959 break;
2960 case ETHTOOL_GEEE:
2961 rc = ethtool_get_eee(dev, useraddr);
2962 break;
2963 case ETHTOOL_SEEE:
2964 rc = ethtool_set_eee(dev, useraddr);
2965 break;
2966 case ETHTOOL_NWAY_RST:
2967 rc = ethtool_nway_reset(dev);
2968 break;
2969 case ETHTOOL_GLINK:
2970 rc = ethtool_get_link(dev, useraddr);
2971 break;
2972 case ETHTOOL_GEEPROM:
2973 rc = ethtool_get_eeprom(dev, useraddr);
2974 break;
2975 case ETHTOOL_SEEPROM:
2976 rc = ethtool_set_eeprom(dev, useraddr);
2977 break;
2978 case ETHTOOL_GCOALESCE:
2979 rc = ethtool_get_coalesce(dev, useraddr);
2980 break;
2981 case ETHTOOL_SCOALESCE:
2982 rc = ethtool_set_coalesce(dev, useraddr);
2983 break;
2984 case ETHTOOL_GRINGPARAM:
2985 rc = ethtool_get_ringparam(dev, useraddr);
2986 break;
2987 case ETHTOOL_SRINGPARAM:
2988 rc = ethtool_set_ringparam(dev, useraddr);
2989 break;
2990 case ETHTOOL_GPAUSEPARAM:
2991 rc = ethtool_get_pauseparam(dev, useraddr);
2992 break;
2993 case ETHTOOL_SPAUSEPARAM:
2994 rc = ethtool_set_pauseparam(dev, useraddr);
2995 break;
2996 case ETHTOOL_TEST:
2997 rc = ethtool_self_test(dev, useraddr);
2998 break;
2999 case ETHTOOL_GSTRINGS:
3000 rc = ethtool_get_strings(dev, useraddr);
3001 break;
3002 case ETHTOOL_PHYS_ID:
3003 rc = ethtool_phys_id(dev, useraddr);
3004 break;
3005 case ETHTOOL_GSTATS:
3006 rc = ethtool_get_stats(dev, useraddr);
3007 break;
3008 case ETHTOOL_GPERMADDR:
3009 rc = ethtool_get_perm_addr(dev, useraddr);
3010 break;
3011 case ETHTOOL_GFLAGS:
3012 rc = ethtool_get_value(dev, useraddr, ethcmd,
3013 __ethtool_get_flags);
3014 break;
3015 case ETHTOOL_SFLAGS:
3016 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
3017 break;
3018 case ETHTOOL_GPFLAGS:
3019 rc = ethtool_get_value(dev, useraddr, ethcmd,
3020 dev->ethtool_ops->get_priv_flags);
3021 if (!rc)
3022 ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
3023 break;
3024 case ETHTOOL_SPFLAGS:
3025 rc = ethtool_set_value(dev, useraddr,
3026 dev->ethtool_ops->set_priv_flags);
3027 break;
3028 case ETHTOOL_GRXFH:
3029 case ETHTOOL_GRXRINGS:
3030 case ETHTOOL_GRXCLSRLCNT:
3031 case ETHTOOL_GRXCLSRULE:
3032 case ETHTOOL_GRXCLSRLALL:
3033 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
3034 break;
3035 case ETHTOOL_SRXFH:
3036 case ETHTOOL_SRXCLSRLDEL:
3037 case ETHTOOL_SRXCLSRLINS:
3038 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
3039 break;
3040 case ETHTOOL_FLASHDEV:
3041 rc = ethtool_flash_device(dev, devlink_state);
3042 break;
3043 case ETHTOOL_RESET:
3044 rc = ethtool_reset(dev, useraddr);
3045 break;
3046 case ETHTOOL_GSSET_INFO:
3047 rc = ethtool_get_sset_info(dev, useraddr);
3048 break;
3049 case ETHTOOL_GRXFHINDIR:
3050 rc = ethtool_get_rxfh_indir(dev, useraddr);
3051 break;
3052 case ETHTOOL_SRXFHINDIR:
3053 rc = ethtool_set_rxfh_indir(dev, useraddr);
3054 break;
3055 case ETHTOOL_GRSSH:
3056 rc = ethtool_get_rxfh(dev, useraddr);
3057 break;
3058 case ETHTOOL_SRSSH:
3059 rc = ethtool_set_rxfh(dev, useraddr);
3060 break;
3061 case ETHTOOL_GFEATURES:
3062 rc = ethtool_get_features(dev, useraddr);
3063 break;
3064 case ETHTOOL_SFEATURES:
3065 rc = ethtool_set_features(dev, useraddr);
3066 break;
3067 case ETHTOOL_GTXCSUM:
3068 case ETHTOOL_GRXCSUM:
3069 case ETHTOOL_GSG:
3070 case ETHTOOL_GTSO:
3071 case ETHTOOL_GGSO:
3072 case ETHTOOL_GGRO:
3073 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
3074 break;
3075 case ETHTOOL_STXCSUM:
3076 case ETHTOOL_SRXCSUM:
3077 case ETHTOOL_SSG:
3078 case ETHTOOL_STSO:
3079 case ETHTOOL_SGSO:
3080 case ETHTOOL_SGRO:
3081 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
3082 break;
3083 case ETHTOOL_GCHANNELS:
3084 rc = ethtool_get_channels(dev, useraddr);
3085 break;
3086 case ETHTOOL_SCHANNELS:
3087 rc = ethtool_set_channels(dev, useraddr);
3088 break;
3089 case ETHTOOL_SET_DUMP:
3090 rc = ethtool_set_dump(dev, useraddr);
3091 break;
3092 case ETHTOOL_GET_DUMP_FLAG:
3093 rc = ethtool_get_dump_flag(dev, useraddr);
3094 break;
3095 case ETHTOOL_GET_DUMP_DATA:
3096 rc = ethtool_get_dump_data(dev, useraddr);
3097 break;
3098 case ETHTOOL_GET_TS_INFO:
3099 rc = ethtool_get_ts_info(dev, useraddr);
3100 break;
3101 case ETHTOOL_GMODULEINFO:
3102 rc = ethtool_get_module_info(dev, useraddr);
3103 break;
3104 case ETHTOOL_GMODULEEEPROM:
3105 rc = ethtool_get_module_eeprom(dev, useraddr);
3106 break;
3107 case ETHTOOL_GTUNABLE:
3108 rc = ethtool_get_tunable(dev, useraddr);
3109 break;
3110 case ETHTOOL_STUNABLE:
3111 rc = ethtool_set_tunable(dev, useraddr);
3112 break;
3113 case ETHTOOL_GPHYSTATS:
3114 rc = ethtool_get_phy_stats(dev, useraddr);
3115 break;
3116 case ETHTOOL_PERQUEUE:
3117 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
3118 break;
3119 case ETHTOOL_GLINKSETTINGS:
3120 rc = ethtool_get_link_ksettings(dev, useraddr);
3121 break;
3122 case ETHTOOL_SLINKSETTINGS:
3123 rc = ethtool_set_link_ksettings(dev, useraddr);
3124 break;
3125 case ETHTOOL_PHY_GTUNABLE:
3126 rc = get_phy_tunable(dev, useraddr);
3127 break;
3128 case ETHTOOL_PHY_STUNABLE:
3129 rc = set_phy_tunable(dev, useraddr);
3130 break;
3131 case ETHTOOL_GFECPARAM:
3132 rc = ethtool_get_fecparam(dev, useraddr);
3133 break;
3134 case ETHTOOL_SFECPARAM:
3135 rc = ethtool_set_fecparam(dev, useraddr);
3136 break;
3137 default:
3138 rc = -EOPNOTSUPP;
3139 }
3140
3141 if (dev->ethtool_ops->complete)
3142 dev->ethtool_ops->complete(dev);
3143
3144 if (old_features != dev->features)
3145 netdev_features_change(dev);
3146out:
3147 if (dev->dev.parent)
3148 pm_runtime_put(dev->dev.parent);
3149
3150 return rc;
3151}
3152
3153int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr)
3154{
3155 struct ethtool_devlink_compat *state;
3156 u32 ethcmd;
3157 int rc;
3158
3159 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
3160 return -EFAULT;
3161
3162 state = kzalloc(sizeof(*state), GFP_KERNEL);
3163 if (!state)
3164 return -ENOMEM;
3165
3166 switch (ethcmd) {
3167 case ETHTOOL_FLASHDEV:
3168 if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) {
3169 rc = -EFAULT;
3170 goto exit_free;
3171 }
3172 state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
3173 break;
3174 }
3175
3176 rtnl_lock();
3177 rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state);
3178 rtnl_unlock();
3179 if (rc)
3180 goto exit_free;
3181
3182 switch (ethcmd) {
3183 case ETHTOOL_FLASHDEV:
3184 if (state->devlink)
3185 rc = devlink_compat_flash_update(state->devlink,
3186 state->efl.data);
3187 break;
3188 case ETHTOOL_GDRVINFO:
3189 if (state->devlink)
3190 devlink_compat_running_version(state->devlink,
3191 state->info.fw_version,
3192 sizeof(state->info.fw_version));
3193 if (copy_to_user(useraddr, &state->info, sizeof(state->info))) {
3194 rc = -EFAULT;
3195 goto exit_free;
3196 }
3197 break;
3198 }
3199
3200exit_free:
3201 if (state->devlink)
3202 devlink_put(state->devlink);
3203 kfree(state);
3204 return rc;
3205}
3206
3207struct ethtool_rx_flow_key {
3208 struct flow_dissector_key_basic basic;
3209 union {
3210 struct flow_dissector_key_ipv4_addrs ipv4;
3211 struct flow_dissector_key_ipv6_addrs ipv6;
3212 };
3213 struct flow_dissector_key_ports tp;
3214 struct flow_dissector_key_ip ip;
3215 struct flow_dissector_key_vlan vlan;
3216 struct flow_dissector_key_eth_addrs eth_addrs;
3217} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
3218
3219struct ethtool_rx_flow_match {
3220 struct flow_dissector dissector;
3221 struct ethtool_rx_flow_key key;
3222 struct ethtool_rx_flow_key mask;
3223};
3224
3225struct ethtool_rx_flow_rule *
3226ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
3227{
3228 const struct ethtool_rx_flow_spec *fs = input->fs;
3229 struct ethtool_rx_flow_match *match;
3230 struct ethtool_rx_flow_rule *flow;
3231 struct flow_action_entry *act;
3232
3233 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
3234 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
3235 if (!flow)
3236 return ERR_PTR(-ENOMEM);
3237
3238 /* ethtool_rx supports only one single action per rule. */
3239 flow->rule = flow_rule_alloc(1);
3240 if (!flow->rule) {
3241 kfree(flow);
3242 return ERR_PTR(-ENOMEM);
3243 }
3244
3245 match = (struct ethtool_rx_flow_match *)flow->priv;
3246 flow->rule->match.dissector = &match->dissector;
3247 flow->rule->match.mask = &match->mask;
3248 flow->rule->match.key = &match->key;
3249
3250 match->mask.basic.n_proto = htons(0xffff);
3251
3252 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3253 case ETHER_FLOW: {
3254 const struct ethhdr *ether_spec, *ether_m_spec;
3255
3256 ether_spec = &fs->h_u.ether_spec;
3257 ether_m_spec = &fs->m_u.ether_spec;
3258
3259 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
3260 ether_addr_copy(match->key.eth_addrs.src,
3261 ether_spec->h_source);
3262 ether_addr_copy(match->mask.eth_addrs.src,
3263 ether_m_spec->h_source);
3264 }
3265 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
3266 ether_addr_copy(match->key.eth_addrs.dst,
3267 ether_spec->h_dest);
3268 ether_addr_copy(match->mask.eth_addrs.dst,
3269 ether_m_spec->h_dest);
3270 }
3271 if (ether_m_spec->h_proto) {
3272 match->key.basic.n_proto = ether_spec->h_proto;
3273 match->mask.basic.n_proto = ether_m_spec->h_proto;
3274 }
3275 }
3276 break;
3277 case TCP_V4_FLOW:
3278 case UDP_V4_FLOW: {
3279 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
3280
3281 match->key.basic.n_proto = htons(ETH_P_IP);
3282
3283 v4_spec = &fs->h_u.tcp_ip4_spec;
3284 v4_m_spec = &fs->m_u.tcp_ip4_spec;
3285
3286 if (v4_m_spec->ip4src) {
3287 match->key.ipv4.src = v4_spec->ip4src;
3288 match->mask.ipv4.src = v4_m_spec->ip4src;
3289 }
3290 if (v4_m_spec->ip4dst) {
3291 match->key.ipv4.dst = v4_spec->ip4dst;
3292 match->mask.ipv4.dst = v4_m_spec->ip4dst;
3293 }
3294 if (v4_m_spec->ip4src ||
3295 v4_m_spec->ip4dst) {
3296 match->dissector.used_keys |=
3297 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
3298 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
3299 offsetof(struct ethtool_rx_flow_key, ipv4);
3300 }
3301 if (v4_m_spec->psrc) {
3302 match->key.tp.src = v4_spec->psrc;
3303 match->mask.tp.src = v4_m_spec->psrc;
3304 }
3305 if (v4_m_spec->pdst) {
3306 match->key.tp.dst = v4_spec->pdst;
3307 match->mask.tp.dst = v4_m_spec->pdst;
3308 }
3309 if (v4_m_spec->psrc ||
3310 v4_m_spec->pdst) {
3311 match->dissector.used_keys |=
3312 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3313 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3314 offsetof(struct ethtool_rx_flow_key, tp);
3315 }
3316 if (v4_m_spec->tos) {
3317 match->key.ip.tos = v4_spec->tos;
3318 match->mask.ip.tos = v4_m_spec->tos;
3319 match->dissector.used_keys |=
3320 BIT(FLOW_DISSECTOR_KEY_IP);
3321 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3322 offsetof(struct ethtool_rx_flow_key, ip);
3323 }
3324 }
3325 break;
3326 case TCP_V6_FLOW:
3327 case UDP_V6_FLOW: {
3328 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
3329
3330 match->key.basic.n_proto = htons(ETH_P_IPV6);
3331
3332 v6_spec = &fs->h_u.tcp_ip6_spec;
3333 v6_m_spec = &fs->m_u.tcp_ip6_spec;
3334 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) {
3335 memcpy(&match->key.ipv6.src, v6_spec->ip6src,
3336 sizeof(match->key.ipv6.src));
3337 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
3338 sizeof(match->mask.ipv6.src));
3339 }
3340 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3341 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
3342 sizeof(match->key.ipv6.dst));
3343 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
3344 sizeof(match->mask.ipv6.dst));
3345 }
3346 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) ||
3347 !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) {
3348 match->dissector.used_keys |=
3349 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
3350 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
3351 offsetof(struct ethtool_rx_flow_key, ipv6);
3352 }
3353 if (v6_m_spec->psrc) {
3354 match->key.tp.src = v6_spec->psrc;
3355 match->mask.tp.src = v6_m_spec->psrc;
3356 }
3357 if (v6_m_spec->pdst) {
3358 match->key.tp.dst = v6_spec->pdst;
3359 match->mask.tp.dst = v6_m_spec->pdst;
3360 }
3361 if (v6_m_spec->psrc ||
3362 v6_m_spec->pdst) {
3363 match->dissector.used_keys |=
3364 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
3365 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3366 offsetof(struct ethtool_rx_flow_key, tp);
3367 }
3368 if (v6_m_spec->tclass) {
3369 match->key.ip.tos = v6_spec->tclass;
3370 match->mask.ip.tos = v6_m_spec->tclass;
3371 match->dissector.used_keys |=
3372 BIT_ULL(FLOW_DISSECTOR_KEY_IP);
3373 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3374 offsetof(struct ethtool_rx_flow_key, ip);
3375 }
3376 }
3377 break;
3378 default:
3379 ethtool_rx_flow_rule_destroy(flow);
3380 return ERR_PTR(-EINVAL);
3381 }
3382
3383 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3384 case TCP_V4_FLOW:
3385 case TCP_V6_FLOW:
3386 match->key.basic.ip_proto = IPPROTO_TCP;
3387 match->mask.basic.ip_proto = 0xff;
3388 break;
3389 case UDP_V4_FLOW:
3390 case UDP_V6_FLOW:
3391 match->key.basic.ip_proto = IPPROTO_UDP;
3392 match->mask.basic.ip_proto = 0xff;
3393 break;
3394 }
3395
3396 match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC);
3397 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3398 offsetof(struct ethtool_rx_flow_key, basic);
3399
3400 if (fs->flow_type & FLOW_EXT) {
3401 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3402 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3403
3404 if (ext_m_spec->vlan_etype) {
3405 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3406 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3407 }
3408
3409 if (ext_m_spec->vlan_tci) {
3410 match->key.vlan.vlan_id =
3411 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3412 match->mask.vlan.vlan_id =
3413 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3414
3415 match->key.vlan.vlan_dei =
3416 !!(ext_h_spec->vlan_tci & htons(0x1000));
3417 match->mask.vlan.vlan_dei =
3418 !!(ext_m_spec->vlan_tci & htons(0x1000));
3419
3420 match->key.vlan.vlan_priority =
3421 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3422 match->mask.vlan.vlan_priority =
3423 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3424 }
3425
3426 if (ext_m_spec->vlan_etype ||
3427 ext_m_spec->vlan_tci) {
3428 match->dissector.used_keys |=
3429 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN);
3430 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3431 offsetof(struct ethtool_rx_flow_key, vlan);
3432 }
3433 }
3434 if (fs->flow_type & FLOW_MAC_EXT) {
3435 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3436 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3437
3438 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3439 ETH_ALEN);
3440 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3441 ETH_ALEN);
3442
3443 match->dissector.used_keys |=
3444 BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3445 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3446 offsetof(struct ethtool_rx_flow_key, eth_addrs);
3447 }
3448
3449 act = &flow->rule->action.entries[0];
3450 switch (fs->ring_cookie) {
3451 case RX_CLS_FLOW_DISC:
3452 act->id = FLOW_ACTION_DROP;
3453 break;
3454 case RX_CLS_FLOW_WAKE:
3455 act->id = FLOW_ACTION_WAKE;
3456 break;
3457 default:
3458 act->id = FLOW_ACTION_QUEUE;
3459 if (fs->flow_type & FLOW_RSS)
3460 act->queue.ctx = input->rss_ctx;
3461
3462 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3463 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3464 break;
3465 }
3466
3467 return flow;
3468}
3469EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3470
3471void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3472{
3473 kfree(flow->rule);
3474 kfree(flow);
3475}
3476EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);