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