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drm/i915: Check incoming alignment for unfenced buffers (on i915gm)
[linux-stable.git] / net / core / ethtool.c
blob9a9a3d77e3274fc3e115fe73470f18bc93be6364
1 /*
2 * net/core/ethtool.c - Ethtool ioctl handler
3 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
4 *
5 * This file is where we call all the ethtool_ops commands to get
6 * the information ethtool needs.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14 #include <linux/module.h>
15 #include <linux/types.h>
16 #include <linux/capability.h>
17 #include <linux/errno.h>
18 #include <linux/ethtool.h>
19 #include <linux/netdevice.h>
20 #include <linux/net_tstamp.h>
21 #include <linux/phy.h>
22 #include <linux/bitops.h>
23 #include <linux/uaccess.h>
24 #include <linux/vmalloc.h>
25 #include <linux/slab.h>
26 #include <linux/rtnetlink.h>
27 #include <linux/sched/signal.h>
28 #include <linux/net.h>
29
30 /*
31 * Some useful ethtool_ops methods that're device independent.
32 * If we find that all drivers want to do the same thing here,
33 * we can turn these into dev_() function calls.
34 */
35
36 u32 ethtool_op_get_link(struct net_device *dev)
37 {
38 return netif_carrier_ok(dev) ? 1 : 0;
39 }
40 EXPORT_SYMBOL(ethtool_op_get_link);
41
42 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
43 {
44 info->so_timestamping =
45 SOF_TIMESTAMPING_TX_SOFTWARE |
46 SOF_TIMESTAMPING_RX_SOFTWARE |
47 SOF_TIMESTAMPING_SOFTWARE;
48 info->phc_index = -1;
49 return 0;
50 }
51 EXPORT_SYMBOL(ethtool_op_get_ts_info);
52
53 /* Handlers for each ethtool command */
54
55 #define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
56
57 static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
58 [NETIF_F_SG_BIT] = "tx-scatter-gather",
59 [NETIF_F_IP_CSUM_BIT] = "tx-checksum-ipv4",
60 [NETIF_F_HW_CSUM_BIT] = "tx-checksum-ip-generic",
61 [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6",
62 [NETIF_F_HIGHDMA_BIT] = "highdma",
63 [NETIF_F_FRAGLIST_BIT] = "tx-scatter-gather-fraglist",
64 [NETIF_F_HW_VLAN_CTAG_TX_BIT] = "tx-vlan-hw-insert",
65
66 [NETIF_F_HW_VLAN_CTAG_RX_BIT] = "rx-vlan-hw-parse",
67 [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
68 [NETIF_F_HW_VLAN_STAG_TX_BIT] = "tx-vlan-stag-hw-insert",
69 [NETIF_F_HW_VLAN_STAG_RX_BIT] = "rx-vlan-stag-hw-parse",
70 [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
71 [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged",
72 [NETIF_F_GSO_BIT] = "tx-generic-segmentation",
73 [NETIF_F_LLTX_BIT] = "tx-lockless",
74 [NETIF_F_NETNS_LOCAL_BIT] = "netns-local",
75 [NETIF_F_GRO_BIT] = "rx-gro",
76 [NETIF_F_LRO_BIT] = "rx-lro",
77
78 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation",
79 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
80 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
81 [NETIF_F_TSO_MANGLEID_BIT] = "tx-tcp-mangleid-segmentation",
82 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
83 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
84 [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
85 [NETIF_F_GSO_GRE_CSUM_BIT] = "tx-gre-csum-segmentation",
86 [NETIF_F_GSO_IPXIP4_BIT] = "tx-ipxip4-segmentation",
87 [NETIF_F_GSO_IPXIP6_BIT] = "tx-ipxip6-segmentation",
88 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
89 [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
90 [NETIF_F_GSO_PARTIAL_BIT] = "tx-gso-partial",
91 [NETIF_F_GSO_SCTP_BIT] = "tx-sctp-segmentation",
92 [NETIF_F_GSO_ESP_BIT] = "tx-esp-segmentation",
93
94 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
95 [NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
96 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
97 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
98 [NETIF_F_RXHASH_BIT] = "rx-hashing",
99 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
100 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
101 [NETIF_F_LOOPBACK_BIT] = "loopback",
102 [NETIF_F_RXFCS_BIT] = "rx-fcs",
103 [NETIF_F_RXALL_BIT] = "rx-all",
104 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
105 [NETIF_F_HW_TC_BIT] = "hw-tc-offload",
106 [NETIF_F_HW_ESP_BIT] = "esp-hw-offload",
107 [NETIF_F_HW_ESP_TX_CSUM_BIT] = "esp-tx-csum-hw-offload",
108 [NETIF_F_RX_UDP_TUNNEL_PORT_BIT] = "rx-udp_tunnel-port-offload",
109 };
110
111 static const char
112 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
113 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
114 [ETH_RSS_HASH_XOR_BIT] = "xor",
115 [ETH_RSS_HASH_CRC32_BIT] = "crc32",
116 };
117
118 static const char
119 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
120 [ETHTOOL_ID_UNSPEC] = "Unspec",
121 [ETHTOOL_RX_COPYBREAK] = "rx-copybreak",
122 [ETHTOOL_TX_COPYBREAK] = "tx-copybreak",
123 };
124
125 static const char
126 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
127 [ETHTOOL_ID_UNSPEC] = "Unspec",
128 [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
129 };
130
131 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
132 {
133 struct ethtool_gfeatures cmd = {
134 .cmd = ETHTOOL_GFEATURES,
135 .size = ETHTOOL_DEV_FEATURE_WORDS,
136 };
137 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
138 u32 __user *sizeaddr;
139 u32 copy_size;
140 int i;
141
142 /* in case feature bits run out again */
143 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
144
145 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
146 features[i].available = (u32)(dev->hw_features >> (32 * i));
147 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
148 features[i].active = (u32)(dev->features >> (32 * i));
149 features[i].never_changed =
150 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
151 }
152
153 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
154 if (get_user(copy_size, sizeaddr))
155 return -EFAULT;
156
157 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
158 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
159
160 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
161 return -EFAULT;
162 useraddr += sizeof(cmd);
163 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
164 return -EFAULT;
165
166 return 0;
167 }
168
169 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
170 {
171 struct ethtool_sfeatures cmd;
172 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
173 netdev_features_t wanted = 0, valid = 0;
174 int i, ret = 0;
175
176 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
177 return -EFAULT;
178 useraddr += sizeof(cmd);
179
180 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
181 return -EINVAL;
182
183 if (copy_from_user(features, useraddr, sizeof(features)))
184 return -EFAULT;
185
186 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
187 valid |= (netdev_features_t)features[i].valid << (32 * i);
188 wanted |= (netdev_features_t)features[i].requested << (32 * i);
189 }
190
191 if (valid & ~NETIF_F_ETHTOOL_BITS)
192 return -EINVAL;
193
194 if (valid & ~dev->hw_features) {
195 valid &= dev->hw_features;
196 ret |= ETHTOOL_F_UNSUPPORTED;
197 }
198
199 dev->wanted_features &= ~valid;
200 dev->wanted_features |= wanted & valid;
201 __netdev_update_features(dev);
202
203 if ((dev->wanted_features ^ dev->features) & valid)
204 ret |= ETHTOOL_F_WISH;
205
206 return ret;
207 }
208
209 static int phy_get_sset_count(struct phy_device *phydev)
210 {
211 int ret;
212
213 if (phydev->drv->get_sset_count &&
214 phydev->drv->get_strings &&
215 phydev->drv->get_stats) {
216 mutex_lock(&phydev->lock);
217 ret = phydev->drv->get_sset_count(phydev);
218 mutex_unlock(&phydev->lock);
219
220 return ret;
221 }
222
223 return -EOPNOTSUPP;
224 }
225
226 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
227 {
228 const struct ethtool_ops *ops = dev->ethtool_ops;
229
230 if (sset == ETH_SS_FEATURES)
231 return ARRAY_SIZE(netdev_features_strings);
232
233 if (sset == ETH_SS_RSS_HASH_FUNCS)
234 return ARRAY_SIZE(rss_hash_func_strings);
235
236 if (sset == ETH_SS_TUNABLES)
237 return ARRAY_SIZE(tunable_strings);
238
239 if (sset == ETH_SS_PHY_TUNABLES)
240 return ARRAY_SIZE(phy_tunable_strings);
241
242 if (sset == ETH_SS_PHY_STATS) {
243 if (dev->phydev)
244 return phy_get_sset_count(dev->phydev);
245 else
246 return -EOPNOTSUPP;
247 }
248
249 if (ops->get_sset_count && ops->get_strings)
250 return ops->get_sset_count(dev, sset);
251 else
252 return -EOPNOTSUPP;
253 }
254
255 static void __ethtool_get_strings(struct net_device *dev,
256 u32 stringset, u8 *data)
257 {
258 const struct ethtool_ops *ops = dev->ethtool_ops;
259
260 if (stringset == ETH_SS_FEATURES)
261 memcpy(data, netdev_features_strings,
262 sizeof(netdev_features_strings));
263 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
264 memcpy(data, rss_hash_func_strings,
265 sizeof(rss_hash_func_strings));
266 else if (stringset == ETH_SS_TUNABLES)
267 memcpy(data, tunable_strings, sizeof(tunable_strings));
268 else if (stringset == ETH_SS_PHY_TUNABLES)
269 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
270 else if (stringset == ETH_SS_PHY_STATS) {
271 struct phy_device *phydev = dev->phydev;
272
273 if (phydev) {
274 mutex_lock(&phydev->lock);
275 phydev->drv->get_strings(phydev, data);
276 mutex_unlock(&phydev->lock);
277 } else {
278 return;
279 }
280 } else
281 /* ops->get_strings is valid because checked earlier */
282 ops->get_strings(dev, stringset, data);
283 }
284
285 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
286 {
287 /* feature masks of legacy discrete ethtool ops */
288
289 switch (eth_cmd) {
290 case ETHTOOL_GTXCSUM:
291 case ETHTOOL_STXCSUM:
292 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
293 case ETHTOOL_GRXCSUM:
294 case ETHTOOL_SRXCSUM:
295 return NETIF_F_RXCSUM;
296 case ETHTOOL_GSG:
297 case ETHTOOL_SSG:
298 return NETIF_F_SG;
299 case ETHTOOL_GTSO:
300 case ETHTOOL_STSO:
301 return NETIF_F_ALL_TSO;
302 case ETHTOOL_GGSO:
303 case ETHTOOL_SGSO:
304 return NETIF_F_GSO;
305 case ETHTOOL_GGRO:
306 case ETHTOOL_SGRO:
307 return NETIF_F_GRO;
308 default:
309 BUG();
310 }
311 }
312
313 static int ethtool_get_one_feature(struct net_device *dev,
314 char __user *useraddr, u32 ethcmd)
315 {
316 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
317 struct ethtool_value edata = {
318 .cmd = ethcmd,
319 .data = !!(dev->features & mask),
320 };
321
322 if (copy_to_user(useraddr, &edata, sizeof(edata)))
323 return -EFAULT;
324 return 0;
325 }
326
327 static int ethtool_set_one_feature(struct net_device *dev,
328 void __user *useraddr, u32 ethcmd)
329 {
330 struct ethtool_value edata;
331 netdev_features_t mask;
332
333 if (copy_from_user(&edata, useraddr, sizeof(edata)))
334 return -EFAULT;
335
336 mask = ethtool_get_feature_mask(ethcmd);
337 mask &= dev->hw_features;
338 if (!mask)
339 return -EOPNOTSUPP;
340
341 if (edata.data)
342 dev->wanted_features |= mask;
343 else
344 dev->wanted_features &= ~mask;
345
346 __netdev_update_features(dev);
347
348 return 0;
349 }
350
351 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
352 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
353 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
354 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
355 NETIF_F_RXHASH)
356
357 static u32 __ethtool_get_flags(struct net_device *dev)
358 {
359 u32 flags = 0;
360
361 if (dev->features & NETIF_F_LRO)
362 flags |= ETH_FLAG_LRO;
363 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
364 flags |= ETH_FLAG_RXVLAN;
365 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
366 flags |= ETH_FLAG_TXVLAN;
367 if (dev->features & NETIF_F_NTUPLE)
368 flags |= ETH_FLAG_NTUPLE;
369 if (dev->features & NETIF_F_RXHASH)
370 flags |= ETH_FLAG_RXHASH;
371
372 return flags;
373 }
374
375 static int __ethtool_set_flags(struct net_device *dev, u32 data)
376 {
377 netdev_features_t features = 0, changed;
378
379 if (data & ~ETH_ALL_FLAGS)
380 return -EINVAL;
381
382 if (data & ETH_FLAG_LRO)
383 features |= NETIF_F_LRO;
384 if (data & ETH_FLAG_RXVLAN)
385 features |= NETIF_F_HW_VLAN_CTAG_RX;
386 if (data & ETH_FLAG_TXVLAN)
387 features |= NETIF_F_HW_VLAN_CTAG_TX;
388 if (data & ETH_FLAG_NTUPLE)
389 features |= NETIF_F_NTUPLE;
390 if (data & ETH_FLAG_RXHASH)
391 features |= NETIF_F_RXHASH;
392
393 /* allow changing only bits set in hw_features */
394 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
395 if (changed & ~dev->hw_features)
396 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
397
398 dev->wanted_features =
399 (dev->wanted_features & ~changed) | (features & changed);
400
401 __netdev_update_features(dev);
402
403 return 0;
404 }
405
406 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
407 u32 legacy_u32)
408 {
409 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
410 dst[0] = legacy_u32;
411 }
412 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
413
414 /* return false if src had higher bits set. lower bits always updated. */
415 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
416 const unsigned long *src)
417 {
418 bool retval = true;
419
420 /* TODO: following test will soon always be true */
421 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
422 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
423
424 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
425 bitmap_fill(ext, 32);
426 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
427 if (bitmap_intersects(ext, src,
428 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
429 /* src mask goes beyond bit 31 */
430 retval = false;
431 }
432 }
433 *legacy_u32 = src[0];
434 return retval;
435 }
436 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
437
438 /* return false if legacy contained non-0 deprecated fields
439 * maxtxpkt/maxrxpkt. rest of ksettings always updated
440 */
441 static bool
442 convert_legacy_settings_to_link_ksettings(
443 struct ethtool_link_ksettings *link_ksettings,
444 const struct ethtool_cmd *legacy_settings)
445 {
446 bool retval = true;
447
448 memset(link_ksettings, 0, sizeof(*link_ksettings));
449
450 /* This is used to tell users that driver is still using these
451 * deprecated legacy fields, and they should not use
452 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
453 */
454 if (legacy_settings->maxtxpkt ||
455 legacy_settings->maxrxpkt)
456 retval = false;
457
458 ethtool_convert_legacy_u32_to_link_mode(
459 link_ksettings->link_modes.supported,
460 legacy_settings->supported);
461 ethtool_convert_legacy_u32_to_link_mode(
462 link_ksettings->link_modes.advertising,
463 legacy_settings->advertising);
464 ethtool_convert_legacy_u32_to_link_mode(
465 link_ksettings->link_modes.lp_advertising,
466 legacy_settings->lp_advertising);
467 link_ksettings->base.speed
468 = ethtool_cmd_speed(legacy_settings);
469 link_ksettings->base.duplex
470 = legacy_settings->duplex;
471 link_ksettings->base.port
472 = legacy_settings->port;
473 link_ksettings->base.phy_address
474 = legacy_settings->phy_address;
475 link_ksettings->base.autoneg
476 = legacy_settings->autoneg;
477 link_ksettings->base.mdio_support
478 = legacy_settings->mdio_support;
479 link_ksettings->base.eth_tp_mdix
480 = legacy_settings->eth_tp_mdix;
481 link_ksettings->base.eth_tp_mdix_ctrl
482 = legacy_settings->eth_tp_mdix_ctrl;
483 return retval;
484 }
485
486 /* return false if ksettings link modes had higher bits
487 * set. legacy_settings always updated (best effort)
488 */
489 static bool
490 convert_link_ksettings_to_legacy_settings(
491 struct ethtool_cmd *legacy_settings,
492 const struct ethtool_link_ksettings *link_ksettings)
493 {
494 bool retval = true;
495
496 memset(legacy_settings, 0, sizeof(*legacy_settings));
497 /* this also clears the deprecated fields in legacy structure:
498 * __u8 transceiver;
499 * __u32 maxtxpkt;
500 * __u32 maxrxpkt;
501 */
502
503 retval &= ethtool_convert_link_mode_to_legacy_u32(
504 &legacy_settings->supported,
505 link_ksettings->link_modes.supported);
506 retval &= ethtool_convert_link_mode_to_legacy_u32(
507 &legacy_settings->advertising,
508 link_ksettings->link_modes.advertising);
509 retval &= ethtool_convert_link_mode_to_legacy_u32(
510 &legacy_settings->lp_advertising,
511 link_ksettings->link_modes.lp_advertising);
512 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
513 legacy_settings->duplex
514 = link_ksettings->base.duplex;
515 legacy_settings->port
516 = link_ksettings->base.port;
517 legacy_settings->phy_address
518 = link_ksettings->base.phy_address;
519 legacy_settings->autoneg
520 = link_ksettings->base.autoneg;
521 legacy_settings->mdio_support
522 = link_ksettings->base.mdio_support;
523 legacy_settings->eth_tp_mdix
524 = link_ksettings->base.eth_tp_mdix;
525 legacy_settings->eth_tp_mdix_ctrl
526 = link_ksettings->base.eth_tp_mdix_ctrl;
527 legacy_settings->transceiver
528 = link_ksettings->base.transceiver;
529 return retval;
530 }
531
532 /* number of 32-bit words to store the user's link mode bitmaps */
533 #define __ETHTOOL_LINK_MODE_MASK_NU32 \
534 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
535
536 /* layout of the struct passed from/to userland */
537 struct ethtool_link_usettings {
538 struct ethtool_link_settings base;
539 struct {
540 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
541 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
542 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
543 } link_modes;
544 };
545
546 /* Internal kernel helper to query a device ethtool_link_settings.
547 *
548 * Backward compatibility note: for compatibility with legacy drivers
549 * that implement only the ethtool_cmd API, this has to work with both
550 * drivers implementing get_link_ksettings API and drivers
551 * implementing get_settings API. When drivers implement get_settings
552 * and report ethtool_cmd deprecated fields
553 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
554 * because the resulting struct ethtool_link_settings does not report them.
555 */
556 int __ethtool_get_link_ksettings(struct net_device *dev,
557 struct ethtool_link_ksettings *link_ksettings)
558 {
559 int err;
560 struct ethtool_cmd cmd;
561
562 ASSERT_RTNL();
563
564 if (dev->ethtool_ops->get_link_ksettings) {
565 memset(link_ksettings, 0, sizeof(*link_ksettings));
566 return dev->ethtool_ops->get_link_ksettings(dev,
567 link_ksettings);
568 }
569
570 /* driver doesn't support %ethtool_link_ksettings API. revert to
571 * legacy %ethtool_cmd API, unless it's not supported either.
572 * TODO: remove when ethtool_ops::get_settings disappears internally
573 */
574 if (!dev->ethtool_ops->get_settings)
575 return -EOPNOTSUPP;
576
577 memset(&cmd, 0, sizeof(cmd));
578 cmd.cmd = ETHTOOL_GSET;
579 err = dev->ethtool_ops->get_settings(dev, &cmd);
580 if (err < 0)
581 return err;
582
583 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
584 */
585 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
586 return err;
587 }
588 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
589
590 /* convert ethtool_link_usettings in user space to a kernel internal
591 * ethtool_link_ksettings. return 0 on success, errno on error.
592 */
593 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
594 const void __user *from)
595 {
596 struct ethtool_link_usettings link_usettings;
597
598 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
599 return -EFAULT;
600
601 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
602 bitmap_from_u32array(to->link_modes.supported,
603 __ETHTOOL_LINK_MODE_MASK_NBITS,
604 link_usettings.link_modes.supported,
605 __ETHTOOL_LINK_MODE_MASK_NU32);
606 bitmap_from_u32array(to->link_modes.advertising,
607 __ETHTOOL_LINK_MODE_MASK_NBITS,
608 link_usettings.link_modes.advertising,
609 __ETHTOOL_LINK_MODE_MASK_NU32);
610 bitmap_from_u32array(to->link_modes.lp_advertising,
611 __ETHTOOL_LINK_MODE_MASK_NBITS,
612 link_usettings.link_modes.lp_advertising,
613 __ETHTOOL_LINK_MODE_MASK_NU32);
614
615 return 0;
616 }
617
618 /* convert a kernel internal ethtool_link_ksettings to
619 * ethtool_link_usettings in user space. return 0 on success, errno on
620 * error.
621 */
622 static int
623 store_link_ksettings_for_user(void __user *to,
624 const struct ethtool_link_ksettings *from)
625 {
626 struct ethtool_link_usettings link_usettings;
627
628 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
629 bitmap_to_u32array(link_usettings.link_modes.supported,
630 __ETHTOOL_LINK_MODE_MASK_NU32,
631 from->link_modes.supported,
632 __ETHTOOL_LINK_MODE_MASK_NBITS);
633 bitmap_to_u32array(link_usettings.link_modes.advertising,
634 __ETHTOOL_LINK_MODE_MASK_NU32,
635 from->link_modes.advertising,
636 __ETHTOOL_LINK_MODE_MASK_NBITS);
637 bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
638 __ETHTOOL_LINK_MODE_MASK_NU32,
639 from->link_modes.lp_advertising,
640 __ETHTOOL_LINK_MODE_MASK_NBITS);
641
642 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
643 return -EFAULT;
644
645 return 0;
646 }
647
648 /* Query device for its ethtool_link_settings.
649 *
650 * Backward compatibility note: this function must fail when driver
651 * does not implement ethtool::get_link_ksettings, even if legacy
652 * ethtool_ops::get_settings is implemented. This tells new versions
653 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
654 * this driver, so that they can correctly access the ethtool_cmd
655 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
656 * implements ethtool_ops::get_settings anymore.
657 */
658 static int ethtool_get_link_ksettings(struct net_device *dev,
659 void __user *useraddr)
660 {
661 int err = 0;
662 struct ethtool_link_ksettings link_ksettings;
663
664 ASSERT_RTNL();
665
666 if (!dev->ethtool_ops->get_link_ksettings)
667 return -EOPNOTSUPP;
668
669 /* handle bitmap nbits handshake */
670 if (copy_from_user(&link_ksettings.base, useraddr,
671 sizeof(link_ksettings.base)))
672 return -EFAULT;
673
674 if (__ETHTOOL_LINK_MODE_MASK_NU32
675 != link_ksettings.base.link_mode_masks_nwords) {
676 /* wrong link mode nbits requested */
677 memset(&link_ksettings, 0, sizeof(link_ksettings));
678 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
679 /* send back number of words required as negative val */
680 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
681 "need too many bits for link modes!");
682 link_ksettings.base.link_mode_masks_nwords
683 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
684
685 /* copy the base fields back to user, not the link
686 * mode bitmaps
687 */
688 if (copy_to_user(useraddr, &link_ksettings.base,
689 sizeof(link_ksettings.base)))
690 return -EFAULT;
691
692 return 0;
693 }
694
695 /* handshake successful: user/kernel agree on
696 * link_mode_masks_nwords
697 */
698
699 memset(&link_ksettings, 0, sizeof(link_ksettings));
700 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
701 if (err < 0)
702 return err;
703
704 /* make sure we tell the right values to user */
705 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
706 link_ksettings.base.link_mode_masks_nwords
707 = __ETHTOOL_LINK_MODE_MASK_NU32;
708
709 return store_link_ksettings_for_user(useraddr, &link_ksettings);
710 }
711
712 /* Update device ethtool_link_settings.
713 *
714 * Backward compatibility note: this function must fail when driver
715 * does not implement ethtool::set_link_ksettings, even if legacy
716 * ethtool_ops::set_settings is implemented. This tells new versions
717 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
718 * this driver, so that they can correctly update the ethtool_cmd
719 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
720 * implements ethtool_ops::get_settings anymore.
721 */
722 static int ethtool_set_link_ksettings(struct net_device *dev,
723 void __user *useraddr)
724 {
725 int err;
726 struct ethtool_link_ksettings link_ksettings;
727
728 ASSERT_RTNL();
729
730 if (!dev->ethtool_ops->set_link_ksettings)
731 return -EOPNOTSUPP;
732
733 /* make sure nbits field has expected value */
734 if (copy_from_user(&link_ksettings.base, useraddr,
735 sizeof(link_ksettings.base)))
736 return -EFAULT;
737
738 if (__ETHTOOL_LINK_MODE_MASK_NU32
739 != link_ksettings.base.link_mode_masks_nwords)
740 return -EINVAL;
741
742 /* copy the whole structure, now that we know it has expected
743 * format
744 */
745 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
746 if (err)
747 return err;
748
749 /* re-check nwords field, just in case */
750 if (__ETHTOOL_LINK_MODE_MASK_NU32
751 != link_ksettings.base.link_mode_masks_nwords)
752 return -EINVAL;
753
754 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
755 }
756
757 static void
758 warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
759 {
760 char name[sizeof(current->comm)];
761
762 pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
763 get_task_comm(name, current), details);
764 }
765
766 /* Query device for its ethtool_cmd settings.
767 *
768 * Backward compatibility note: for compatibility with legacy ethtool,
769 * this has to work with both drivers implementing get_link_ksettings
770 * API and drivers implementing get_settings API. When drivers
771 * implement get_link_ksettings and report higher link mode bits, a
772 * kernel warning is logged once (with name of 1st driver/device) to
773 * recommend user to upgrade ethtool, but the command is successful
774 * (only the lower link mode bits reported back to user).
775 */
776 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
777 {
778 struct ethtool_cmd cmd;
779
780 ASSERT_RTNL();
781
782 if (dev->ethtool_ops->get_link_ksettings) {
783 /* First, use link_ksettings API if it is supported */
784 int err;
785 struct ethtool_link_ksettings link_ksettings;
786
787 memset(&link_ksettings, 0, sizeof(link_ksettings));
788 err = dev->ethtool_ops->get_link_ksettings(dev,
789 &link_ksettings);
790 if (err < 0)
791 return err;
792 if (!convert_link_ksettings_to_legacy_settings(&cmd,
793 &link_ksettings))
794 warn_incomplete_ethtool_legacy_settings_conversion(
795 "link modes are only partially reported");
796
797 /* send a sensible cmd tag back to user */
798 cmd.cmd = ETHTOOL_GSET;
799 } else {
800 /* driver doesn't support %ethtool_link_ksettings
801 * API. revert to legacy %ethtool_cmd API, unless it's
802 * not supported either.
803 */
804 int err;
805
806 if (!dev->ethtool_ops->get_settings)
807 return -EOPNOTSUPP;
808
809 memset(&cmd, 0, sizeof(cmd));
810 cmd.cmd = ETHTOOL_GSET;
811 err = dev->ethtool_ops->get_settings(dev, &cmd);
812 if (err < 0)
813 return err;
814 }
815
816 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
817 return -EFAULT;
818
819 return 0;
820 }
821
822 /* Update device link settings with given ethtool_cmd.
823 *
824 * Backward compatibility note: for compatibility with legacy ethtool,
825 * this has to work with both drivers implementing set_link_ksettings
826 * API and drivers implementing set_settings API. When drivers
827 * implement set_link_ksettings and user's request updates deprecated
828 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
829 * warning is logged once (with name of 1st driver/device) to
830 * recommend user to upgrade ethtool, and the request is rejected.
831 */
832 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
833 {
834 struct ethtool_cmd cmd;
835
836 ASSERT_RTNL();
837
838 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
839 return -EFAULT;
840
841 /* first, try new %ethtool_link_ksettings API. */
842 if (dev->ethtool_ops->set_link_ksettings) {
843 struct ethtool_link_ksettings link_ksettings;
844
845 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
846 &cmd))
847 return -EINVAL;
848
849 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
850 link_ksettings.base.link_mode_masks_nwords
851 = __ETHTOOL_LINK_MODE_MASK_NU32;
852 return dev->ethtool_ops->set_link_ksettings(dev,
853 &link_ksettings);
854 }
855
856 /* legacy %ethtool_cmd API */
857
858 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
859 * disappears internally
860 */
861
862 if (!dev->ethtool_ops->set_settings)
863 return -EOPNOTSUPP;
864
865 return dev->ethtool_ops->set_settings(dev, &cmd);
866 }
867
868 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
869 void __user *useraddr)
870 {
871 struct ethtool_drvinfo info;
872 const struct ethtool_ops *ops = dev->ethtool_ops;
873
874 memset(&info, 0, sizeof(info));
875 info.cmd = ETHTOOL_GDRVINFO;
876 if (ops->get_drvinfo) {
877 ops->get_drvinfo(dev, &info);
878 } else if (dev->dev.parent && dev->dev.parent->driver) {
879 strlcpy(info.bus_info, dev_name(dev->dev.parent),
880 sizeof(info.bus_info));
881 strlcpy(info.driver, dev->dev.parent->driver->name,
882 sizeof(info.driver));
883 } else {
884 return -EOPNOTSUPP;
885 }
886
887 /*
888 * this method of obtaining string set info is deprecated;
889 * Use ETHTOOL_GSSET_INFO instead.
890 */
891 if (ops->get_sset_count) {
892 int rc;
893
894 rc = ops->get_sset_count(dev, ETH_SS_TEST);
895 if (rc >= 0)
896 info.testinfo_len = rc;
897 rc = ops->get_sset_count(dev, ETH_SS_STATS);
898 if (rc >= 0)
899 info.n_stats = rc;
900 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
901 if (rc >= 0)
902 info.n_priv_flags = rc;
903 }
904 if (ops->get_regs_len)
905 info.regdump_len = ops->get_regs_len(dev);
906 if (ops->get_eeprom_len)
907 info.eedump_len = ops->get_eeprom_len(dev);
908
909 if (copy_to_user(useraddr, &info, sizeof(info)))
910 return -EFAULT;
911 return 0;
912 }
913
914 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
915 void __user *useraddr)
916 {
917 struct ethtool_sset_info info;
918 u64 sset_mask;
919 int i, idx = 0, n_bits = 0, ret, rc;
920 u32 *info_buf = NULL;
921
922 if (copy_from_user(&info, useraddr, sizeof(info)))
923 return -EFAULT;
924
925 /* store copy of mask, because we zero struct later on */
926 sset_mask = info.sset_mask;
927 if (!sset_mask)
928 return 0;
929
930 /* calculate size of return buffer */
931 n_bits = hweight64(sset_mask);
932
933 memset(&info, 0, sizeof(info));
934 info.cmd = ETHTOOL_GSSET_INFO;
935
936 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
937 if (!info_buf)
938 return -ENOMEM;
939
940 /*
941 * fill return buffer based on input bitmask and successful
942 * get_sset_count return
943 */
944 for (i = 0; i < 64; i++) {
945 if (!(sset_mask & (1ULL << i)))
946 continue;
947
948 rc = __ethtool_get_sset_count(dev, i);
949 if (rc >= 0) {
950 info.sset_mask |= (1ULL << i);
951 info_buf[idx++] = rc;
952 }
953 }
954
955 ret = -EFAULT;
956 if (copy_to_user(useraddr, &info, sizeof(info)))
957 goto out;
958
959 useraddr += offsetof(struct ethtool_sset_info, data);
960 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
961 goto out;
962
963 ret = 0;
964
965 out:
966 kfree(info_buf);
967 return ret;
968 }
969
970 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
971 u32 cmd, void __user *useraddr)
972 {
973 struct ethtool_rxnfc info;
974 size_t info_size = sizeof(info);
975 int rc;
976
977 if (!dev->ethtool_ops->set_rxnfc)
978 return -EOPNOTSUPP;
979
980 /* struct ethtool_rxnfc was originally defined for
981 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
982 * members. User-space might still be using that
983 * definition. */
984 if (cmd == ETHTOOL_SRXFH)
985 info_size = (offsetof(struct ethtool_rxnfc, data) +
986 sizeof(info.data));
987
988 if (copy_from_user(&info, useraddr, info_size))
989 return -EFAULT;
990
991 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
992 if (rc)
993 return rc;
994
995 if (cmd == ETHTOOL_SRXCLSRLINS &&
996 copy_to_user(useraddr, &info, info_size))
997 return -EFAULT;
998
999 return 0;
1000 }
1001
1002 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
1003 u32 cmd, void __user *useraddr)
1004 {
1005 struct ethtool_rxnfc info;
1006 size_t info_size = sizeof(info);
1007 const struct ethtool_ops *ops = dev->ethtool_ops;
1008 int ret;
1009 void *rule_buf = NULL;
1010
1011 if (!ops->get_rxnfc)
1012 return -EOPNOTSUPP;
1013
1014 /* struct ethtool_rxnfc was originally defined for
1015 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1016 * members. User-space might still be using that
1017 * definition. */
1018 if (cmd == ETHTOOL_GRXFH)
1019 info_size = (offsetof(struct ethtool_rxnfc, data) +
1020 sizeof(info.data));
1021
1022 if (copy_from_user(&info, useraddr, info_size))
1023 return -EFAULT;
1024
1025 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1026 if (info.rule_cnt > 0) {
1027 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
1028 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
1029 GFP_USER);
1030 if (!rule_buf)
1031 return -ENOMEM;
1032 }
1033 }
1034
1035 ret = ops->get_rxnfc(dev, &info, rule_buf);
1036 if (ret < 0)
1037 goto err_out;
1038
1039 ret = -EFAULT;
1040 if (copy_to_user(useraddr, &info, info_size))
1041 goto err_out;
1042
1043 if (rule_buf) {
1044 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1045 if (copy_to_user(useraddr, rule_buf,
1046 info.rule_cnt * sizeof(u32)))
1047 goto err_out;
1048 }
1049 ret = 0;
1050
1051 err_out:
1052 kfree(rule_buf);
1053
1054 return ret;
1055 }
1056
1057 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1058 struct ethtool_rxnfc *rx_rings,
1059 u32 size)
1060 {
1061 int i;
1062
1063 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
1064 return -EFAULT;
1065
1066 /* Validate ring indices */
1067 for (i = 0; i < size; i++)
1068 if (indir[i] >= rx_rings->data)
1069 return -EINVAL;
1070
1071 return 0;
1072 }
1073
1074 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
1075
1076 void netdev_rss_key_fill(void *buffer, size_t len)
1077 {
1078 BUG_ON(len > sizeof(netdev_rss_key));
1079 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1080 memcpy(buffer, netdev_rss_key, len);
1081 }
1082 EXPORT_SYMBOL(netdev_rss_key_fill);
1083
1084 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1085 {
1086 u32 dev_size, current_max = 0;
1087 u32 *indir;
1088 int ret;
1089
1090 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1091 !dev->ethtool_ops->get_rxfh)
1092 return -EOPNOTSUPP;
1093 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1094 if (dev_size == 0)
1095 return -EOPNOTSUPP;
1096
1097 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1098 if (!indir)
1099 return -ENOMEM;
1100
1101 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1102 if (ret)
1103 goto out;
1104
1105 while (dev_size--)
1106 current_max = max(current_max, indir[dev_size]);
1107
1108 *max = current_max;
1109
1110 out:
1111 kfree(indir);
1112 return ret;
1113 }
1114
1115 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1116 void __user *useraddr)
1117 {
1118 u32 user_size, dev_size;
1119 u32 *indir;
1120 int ret;
1121
1122 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1123 !dev->ethtool_ops->get_rxfh)
1124 return -EOPNOTSUPP;
1125 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1126 if (dev_size == 0)
1127 return -EOPNOTSUPP;
1128
1129 if (copy_from_user(&user_size,
1130 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1131 sizeof(user_size)))
1132 return -EFAULT;
1133
1134 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1135 &dev_size, sizeof(dev_size)))
1136 return -EFAULT;
1137
1138 /* If the user buffer size is 0, this is just a query for the
1139 * device table size. Otherwise, if it's smaller than the
1140 * device table size it's an error.
1141 */
1142 if (user_size < dev_size)
1143 return user_size == 0 ? 0 : -EINVAL;
1144
1145 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1146 if (!indir)
1147 return -ENOMEM;
1148
1149 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1150 if (ret)
1151 goto out;
1152
1153 if (copy_to_user(useraddr +
1154 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1155 indir, dev_size * sizeof(indir[0])))
1156 ret = -EFAULT;
1157
1158 out:
1159 kfree(indir);
1160 return ret;
1161 }
1162
1163 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1164 void __user *useraddr)
1165 {
1166 struct ethtool_rxnfc rx_rings;
1167 u32 user_size, dev_size, i;
1168 u32 *indir;
1169 const struct ethtool_ops *ops = dev->ethtool_ops;
1170 int ret;
1171 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1172
1173 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1174 !ops->get_rxnfc)
1175 return -EOPNOTSUPP;
1176
1177 dev_size = ops->get_rxfh_indir_size(dev);
1178 if (dev_size == 0)
1179 return -EOPNOTSUPP;
1180
1181 if (copy_from_user(&user_size,
1182 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1183 sizeof(user_size)))
1184 return -EFAULT;
1185
1186 if (user_size != 0 && user_size != dev_size)
1187 return -EINVAL;
1188
1189 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1190 if (!indir)
1191 return -ENOMEM;
1192
1193 rx_rings.cmd = ETHTOOL_GRXRINGS;
1194 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1195 if (ret)
1196 goto out;
1197
1198 if (user_size == 0) {
1199 for (i = 0; i < dev_size; i++)
1200 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1201 } else {
1202 ret = ethtool_copy_validate_indir(indir,
1203 useraddr + ringidx_offset,
1204 &rx_rings,
1205 dev_size);
1206 if (ret)
1207 goto out;
1208 }
1209
1210 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1211 if (ret)
1212 goto out;
1213
1214 /* indicate whether rxfh was set to default */
1215 if (user_size == 0)
1216 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1217 else
1218 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1219
1220 out:
1221 kfree(indir);
1222 return ret;
1223 }
1224
1225 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1226 void __user *useraddr)
1227 {
1228 int ret;
1229 const struct ethtool_ops *ops = dev->ethtool_ops;
1230 u32 user_indir_size, user_key_size;
1231 u32 dev_indir_size = 0, dev_key_size = 0;
1232 struct ethtool_rxfh rxfh;
1233 u32 total_size;
1234 u32 indir_bytes;
1235 u32 *indir = NULL;
1236 u8 dev_hfunc = 0;
1237 u8 *hkey = NULL;
1238 u8 *rss_config;
1239
1240 if (!ops->get_rxfh)
1241 return -EOPNOTSUPP;
1242
1243 if (ops->get_rxfh_indir_size)
1244 dev_indir_size = ops->get_rxfh_indir_size(dev);
1245 if (ops->get_rxfh_key_size)
1246 dev_key_size = ops->get_rxfh_key_size(dev);
1247
1248 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1249 return -EFAULT;
1250 user_indir_size = rxfh.indir_size;
1251 user_key_size = rxfh.key_size;
1252
1253 /* Check that reserved fields are 0 for now */
1254 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1255 rxfh.rsvd8[2] || rxfh.rsvd32)
1256 return -EINVAL;
1257
1258 rxfh.indir_size = dev_indir_size;
1259 rxfh.key_size = dev_key_size;
1260 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1261 return -EFAULT;
1262
1263 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1264 (user_key_size && (user_key_size != dev_key_size)))
1265 return -EINVAL;
1266
1267 indir_bytes = user_indir_size * sizeof(indir[0]);
1268 total_size = indir_bytes + user_key_size;
1269 rss_config = kzalloc(total_size, GFP_USER);
1270 if (!rss_config)
1271 return -ENOMEM;
1272
1273 if (user_indir_size)
1274 indir = (u32 *)rss_config;
1275
1276 if (user_key_size)
1277 hkey = rss_config + indir_bytes;
1278
1279 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1280 if (ret)
1281 goto out;
1282
1283 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1284 &dev_hfunc, sizeof(rxfh.hfunc))) {
1285 ret = -EFAULT;
1286 } else if (copy_to_user(useraddr +
1287 offsetof(struct ethtool_rxfh, rss_config[0]),
1288 rss_config, total_size)) {
1289 ret = -EFAULT;
1290 }
1291 out:
1292 kfree(rss_config);
1293
1294 return ret;
1295 }
1296
1297 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1298 void __user *useraddr)
1299 {
1300 int ret;
1301 const struct ethtool_ops *ops = dev->ethtool_ops;
1302 struct ethtool_rxnfc rx_rings;
1303 struct ethtool_rxfh rxfh;
1304 u32 dev_indir_size = 0, dev_key_size = 0, i;
1305 u32 *indir = NULL, indir_bytes = 0;
1306 u8 *hkey = NULL;
1307 u8 *rss_config;
1308 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1309
1310 if (!ops->get_rxnfc || !ops->set_rxfh)
1311 return -EOPNOTSUPP;
1312
1313 if (ops->get_rxfh_indir_size)
1314 dev_indir_size = ops->get_rxfh_indir_size(dev);
1315 if (ops->get_rxfh_key_size)
1316 dev_key_size = ops->get_rxfh_key_size(dev);
1317
1318 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1319 return -EFAULT;
1320
1321 /* Check that reserved fields are 0 for now */
1322 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1323 rxfh.rsvd8[2] || rxfh.rsvd32)
1324 return -EINVAL;
1325
1326 /* If either indir, hash key or function is valid, proceed further.
1327 * Must request at least one change: indir size, hash key or function.
1328 */
1329 if ((rxfh.indir_size &&
1330 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1331 rxfh.indir_size != dev_indir_size) ||
1332 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1333 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1334 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1335 return -EINVAL;
1336
1337 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1338 indir_bytes = dev_indir_size * sizeof(indir[0]);
1339
1340 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1341 if (!rss_config)
1342 return -ENOMEM;
1343
1344 rx_rings.cmd = ETHTOOL_GRXRINGS;
1345 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1346 if (ret)
1347 goto out;
1348
1349 /* rxfh.indir_size == 0 means reset the indir table to default.
1350 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1351 */
1352 if (rxfh.indir_size &&
1353 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1354 indir = (u32 *)rss_config;
1355 ret = ethtool_copy_validate_indir(indir,
1356 useraddr + rss_cfg_offset,
1357 &rx_rings,
1358 rxfh.indir_size);
1359 if (ret)
1360 goto out;
1361 } else if (rxfh.indir_size == 0) {
1362 indir = (u32 *)rss_config;
1363 for (i = 0; i < dev_indir_size; i++)
1364 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1365 }
1366
1367 if (rxfh.key_size) {
1368 hkey = rss_config + indir_bytes;
1369 if (copy_from_user(hkey,
1370 useraddr + rss_cfg_offset + indir_bytes,
1371 rxfh.key_size)) {
1372 ret = -EFAULT;
1373 goto out;
1374 }
1375 }
1376
1377 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1378 if (ret)
1379 goto out;
1380
1381 /* indicate whether rxfh was set to default */
1382 if (rxfh.indir_size == 0)
1383 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1384 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1385 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1386
1387 out:
1388 kfree(rss_config);
1389 return ret;
1390 }
1391
1392 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1393 {
1394 struct ethtool_regs regs;
1395 const struct ethtool_ops *ops = dev->ethtool_ops;
1396 void *regbuf;
1397 int reglen, ret;
1398
1399 if (!ops->get_regs || !ops->get_regs_len)
1400 return -EOPNOTSUPP;
1401
1402 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1403 return -EFAULT;
1404
1405 reglen = ops->get_regs_len(dev);
1406 if (regs.len > reglen)
1407 regs.len = reglen;
1408
1409 regbuf = NULL;
1410 if (reglen) {
1411 regbuf = vzalloc(reglen);
1412 if (!regbuf)
1413 return -ENOMEM;
1414 }
1415
1416 ops->get_regs(dev, &regs, regbuf);
1417
1418 ret = -EFAULT;
1419 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1420 goto out;
1421 useraddr += offsetof(struct ethtool_regs, data);
1422 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
1423 goto out;
1424 ret = 0;
1425
1426 out:
1427 vfree(regbuf);
1428 return ret;
1429 }
1430
1431 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1432 {
1433 struct ethtool_value reset;
1434 int ret;
1435
1436 if (!dev->ethtool_ops->reset)
1437 return -EOPNOTSUPP;
1438
1439 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1440 return -EFAULT;
1441
1442 ret = dev->ethtool_ops->reset(dev, &reset.data);
1443 if (ret)
1444 return ret;
1445
1446 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1447 return -EFAULT;
1448 return 0;
1449 }
1450
1451 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1452 {
1453 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1454
1455 if (!dev->ethtool_ops->get_wol)
1456 return -EOPNOTSUPP;
1457
1458 dev->ethtool_ops->get_wol(dev, &wol);
1459
1460 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1461 return -EFAULT;
1462 return 0;
1463 }
1464
1465 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1466 {
1467 struct ethtool_wolinfo wol;
1468
1469 if (!dev->ethtool_ops->set_wol)
1470 return -EOPNOTSUPP;
1471
1472 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1473 return -EFAULT;
1474
1475 return dev->ethtool_ops->set_wol(dev, &wol);
1476 }
1477
1478 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1479 {
1480 struct ethtool_eee edata;
1481 int rc;
1482
1483 if (!dev->ethtool_ops->get_eee)
1484 return -EOPNOTSUPP;
1485
1486 memset(&edata, 0, sizeof(struct ethtool_eee));
1487 edata.cmd = ETHTOOL_GEEE;
1488 rc = dev->ethtool_ops->get_eee(dev, &edata);
1489
1490 if (rc)
1491 return rc;
1492
1493 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1494 return -EFAULT;
1495
1496 return 0;
1497 }
1498
1499 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1500 {
1501 struct ethtool_eee edata;
1502
1503 if (!dev->ethtool_ops->set_eee)
1504 return -EOPNOTSUPP;
1505
1506 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1507 return -EFAULT;
1508
1509 return dev->ethtool_ops->set_eee(dev, &edata);
1510 }
1511
1512 static int ethtool_nway_reset(struct net_device *dev)
1513 {
1514 if (!dev->ethtool_ops->nway_reset)
1515 return -EOPNOTSUPP;
1516
1517 return dev->ethtool_ops->nway_reset(dev);
1518 }
1519
1520 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1521 {
1522 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1523
1524 if (!dev->ethtool_ops->get_link)
1525 return -EOPNOTSUPP;
1526
1527 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1528
1529 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1530 return -EFAULT;
1531 return 0;
1532 }
1533
1534 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1535 int (*getter)(struct net_device *,
1536 struct ethtool_eeprom *, u8 *),
1537 u32 total_len)
1538 {
1539 struct ethtool_eeprom eeprom;
1540 void __user *userbuf = useraddr + sizeof(eeprom);
1541 u32 bytes_remaining;
1542 u8 *data;
1543 int ret = 0;
1544
1545 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1546 return -EFAULT;
1547
1548 /* Check for wrap and zero */
1549 if (eeprom.offset + eeprom.len <= eeprom.offset)
1550 return -EINVAL;
1551
1552 /* Check for exceeding total eeprom len */
1553 if (eeprom.offset + eeprom.len > total_len)
1554 return -EINVAL;
1555
1556 data = kmalloc(PAGE_SIZE, GFP_USER);
1557 if (!data)
1558 return -ENOMEM;
1559
1560 bytes_remaining = eeprom.len;
1561 while (bytes_remaining > 0) {
1562 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1563
1564 ret = getter(dev, &eeprom, data);
1565 if (ret)
1566 break;
1567 if (copy_to_user(userbuf, data, eeprom.len)) {
1568 ret = -EFAULT;
1569 break;
1570 }
1571 userbuf += eeprom.len;
1572 eeprom.offset += eeprom.len;
1573 bytes_remaining -= eeprom.len;
1574 }
1575
1576 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1577 eeprom.offset -= eeprom.len;
1578 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1579 ret = -EFAULT;
1580
1581 kfree(data);
1582 return ret;
1583 }
1584
1585 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1586 {
1587 const struct ethtool_ops *ops = dev->ethtool_ops;
1588
1589 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1590 !ops->get_eeprom_len(dev))
1591 return -EOPNOTSUPP;
1592
1593 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1594 ops->get_eeprom_len(dev));
1595 }
1596
1597 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1598 {
1599 struct ethtool_eeprom eeprom;
1600 const struct ethtool_ops *ops = dev->ethtool_ops;
1601 void __user *userbuf = useraddr + sizeof(eeprom);
1602 u32 bytes_remaining;
1603 u8 *data;
1604 int ret = 0;
1605
1606 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1607 !ops->get_eeprom_len(dev))
1608 return -EOPNOTSUPP;
1609
1610 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1611 return -EFAULT;
1612
1613 /* Check for wrap and zero */
1614 if (eeprom.offset + eeprom.len <= eeprom.offset)
1615 return -EINVAL;
1616
1617 /* Check for exceeding total eeprom len */
1618 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1619 return -EINVAL;
1620
1621 data = kmalloc(PAGE_SIZE, GFP_USER);
1622 if (!data)
1623 return -ENOMEM;
1624
1625 bytes_remaining = eeprom.len;
1626 while (bytes_remaining > 0) {
1627 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1628
1629 if (copy_from_user(data, userbuf, eeprom.len)) {
1630 ret = -EFAULT;
1631 break;
1632 }
1633 ret = ops->set_eeprom(dev, &eeprom, data);
1634 if (ret)
1635 break;
1636 userbuf += eeprom.len;
1637 eeprom.offset += eeprom.len;
1638 bytes_remaining -= eeprom.len;
1639 }
1640
1641 kfree(data);
1642 return ret;
1643 }
1644
1645 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1646 void __user *useraddr)
1647 {
1648 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1649
1650 if (!dev->ethtool_ops->get_coalesce)
1651 return -EOPNOTSUPP;
1652
1653 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1654
1655 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1656 return -EFAULT;
1657 return 0;
1658 }
1659
1660 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1661 void __user *useraddr)
1662 {
1663 struct ethtool_coalesce coalesce;
1664
1665 if (!dev->ethtool_ops->set_coalesce)
1666 return -EOPNOTSUPP;
1667
1668 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1669 return -EFAULT;
1670
1671 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1672 }
1673
1674 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1675 {
1676 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1677
1678 if (!dev->ethtool_ops->get_ringparam)
1679 return -EOPNOTSUPP;
1680
1681 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1682
1683 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1684 return -EFAULT;
1685 return 0;
1686 }
1687
1688 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1689 {
1690 struct ethtool_ringparam ringparam;
1691
1692 if (!dev->ethtool_ops->set_ringparam)
1693 return -EOPNOTSUPP;
1694
1695 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1696 return -EFAULT;
1697
1698 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1699 }
1700
1701 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1702 void __user *useraddr)
1703 {
1704 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1705
1706 if (!dev->ethtool_ops->get_channels)
1707 return -EOPNOTSUPP;
1708
1709 dev->ethtool_ops->get_channels(dev, &channels);
1710
1711 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1712 return -EFAULT;
1713 return 0;
1714 }
1715
1716 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1717 void __user *useraddr)
1718 {
1719 struct ethtool_channels channels, max = { .cmd = ETHTOOL_GCHANNELS };
1720 u32 max_rx_in_use = 0;
1721
1722 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1723 return -EOPNOTSUPP;
1724
1725 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1726 return -EFAULT;
1727
1728 dev->ethtool_ops->get_channels(dev, &max);
1729
1730 /* ensure new counts are within the maximums */
1731 if ((channels.rx_count > max.max_rx) ||
1732 (channels.tx_count > max.max_tx) ||
1733 (channels.combined_count > max.max_combined) ||
1734 (channels.other_count > max.max_other))
1735 return -EINVAL;
1736
1737 /* ensure the new Rx count fits within the configured Rx flow
1738 * indirection table settings */
1739 if (netif_is_rxfh_configured(dev) &&
1740 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1741 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1742 return -EINVAL;
1743
1744 return dev->ethtool_ops->set_channels(dev, &channels);
1745 }
1746
1747 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1748 {
1749 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1750
1751 if (!dev->ethtool_ops->get_pauseparam)
1752 return -EOPNOTSUPP;
1753
1754 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1755
1756 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1757 return -EFAULT;
1758 return 0;
1759 }
1760
1761 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1762 {
1763 struct ethtool_pauseparam pauseparam;
1764
1765 if (!dev->ethtool_ops->set_pauseparam)
1766 return -EOPNOTSUPP;
1767
1768 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1769 return -EFAULT;
1770
1771 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1772 }
1773
1774 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1775 {
1776 struct ethtool_test test;
1777 const struct ethtool_ops *ops = dev->ethtool_ops;
1778 u64 *data;
1779 int ret, test_len;
1780
1781 if (!ops->self_test || !ops->get_sset_count)
1782 return -EOPNOTSUPP;
1783
1784 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1785 if (test_len < 0)
1786 return test_len;
1787 WARN_ON(test_len == 0);
1788
1789 if (copy_from_user(&test, useraddr, sizeof(test)))
1790 return -EFAULT;
1791
1792 test.len = test_len;
1793 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1794 if (!data)
1795 return -ENOMEM;
1796
1797 ops->self_test(dev, &test, data);
1798
1799 ret = -EFAULT;
1800 if (copy_to_user(useraddr, &test, sizeof(test)))
1801 goto out;
1802 useraddr += sizeof(test);
1803 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1804 goto out;
1805 ret = 0;
1806
1807 out:
1808 kfree(data);
1809 return ret;
1810 }
1811
1812 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1813 {
1814 struct ethtool_gstrings gstrings;
1815 u8 *data;
1816 int ret;
1817
1818 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1819 return -EFAULT;
1820
1821 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1822 if (ret < 0)
1823 return ret;
1824 if (ret > S32_MAX / ETH_GSTRING_LEN)
1825 return -ENOMEM;
1826 WARN_ON_ONCE(!ret);
1827
1828 gstrings.len = ret;
1829 data = vzalloc(gstrings.len * ETH_GSTRING_LEN);
1830 if (gstrings.len && !data)
1831 return -ENOMEM;
1832
1833 __ethtool_get_strings(dev, gstrings.string_set, data);
1834
1835 ret = -EFAULT;
1836 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1837 goto out;
1838 useraddr += sizeof(gstrings);
1839 if (gstrings.len &&
1840 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1841 goto out;
1842 ret = 0;
1843
1844 out:
1845 vfree(data);
1846 return ret;
1847 }
1848
1849 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1850 {
1851 struct ethtool_value id;
1852 static bool busy;
1853 const struct ethtool_ops *ops = dev->ethtool_ops;
1854 int rc;
1855
1856 if (!ops->set_phys_id)
1857 return -EOPNOTSUPP;
1858
1859 if (busy)
1860 return -EBUSY;
1861
1862 if (copy_from_user(&id, useraddr, sizeof(id)))
1863 return -EFAULT;
1864
1865 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1866 if (rc < 0)
1867 return rc;
1868
1869 /* Drop the RTNL lock while waiting, but prevent reentry or
1870 * removal of the device.
1871 */
1872 busy = true;
1873 dev_hold(dev);
1874 rtnl_unlock();
1875
1876 if (rc == 0) {
1877 /* Driver will handle this itself */
1878 schedule_timeout_interruptible(
1879 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1880 } else {
1881 /* Driver expects to be called at twice the frequency in rc */
1882 int n = rc * 2, i, interval = HZ / n;
1883
1884 /* Count down seconds */
1885 do {
1886 /* Count down iterations per second */
1887 i = n;
1888 do {
1889 rtnl_lock();
1890 rc = ops->set_phys_id(dev,
1891 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1892 rtnl_unlock();
1893 if (rc)
1894 break;
1895 schedule_timeout_interruptible(interval);
1896 } while (!signal_pending(current) && --i != 0);
1897 } while (!signal_pending(current) &&
1898 (id.data == 0 || --id.data != 0));
1899 }
1900
1901 rtnl_lock();
1902 dev_put(dev);
1903 busy = false;
1904
1905 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1906 return rc;
1907 }
1908
1909 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1910 {
1911 struct ethtool_stats stats;
1912 const struct ethtool_ops *ops = dev->ethtool_ops;
1913 u64 *data;
1914 int ret, n_stats;
1915
1916 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1917 return -EOPNOTSUPP;
1918
1919 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1920 if (n_stats < 0)
1921 return n_stats;
1922 if (n_stats > S32_MAX / sizeof(u64))
1923 return -ENOMEM;
1924 WARN_ON_ONCE(!n_stats);
1925 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1926 return -EFAULT;
1927
1928 stats.n_stats = n_stats;
1929 data = vzalloc(n_stats * sizeof(u64));
1930 if (n_stats && !data)
1931 return -ENOMEM;
1932
1933 ops->get_ethtool_stats(dev, &stats, data);
1934
1935 ret = -EFAULT;
1936 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1937 goto out;
1938 useraddr += sizeof(stats);
1939 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1940 goto out;
1941 ret = 0;
1942
1943 out:
1944 vfree(data);
1945 return ret;
1946 }
1947
1948 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1949 {
1950 struct ethtool_stats stats;
1951 struct phy_device *phydev = dev->phydev;
1952 u64 *data;
1953 int ret, n_stats;
1954
1955 if (!phydev)
1956 return -EOPNOTSUPP;
1957
1958 n_stats = phy_get_sset_count(phydev);
1959 if (n_stats < 0)
1960 return n_stats;
1961 if (n_stats > S32_MAX / sizeof(u64))
1962 return -ENOMEM;
1963 WARN_ON_ONCE(!n_stats);
1964
1965 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1966 return -EFAULT;
1967
1968 stats.n_stats = n_stats;
1969 data = vzalloc(n_stats * sizeof(u64));
1970 if (n_stats && !data)
1971 return -ENOMEM;
1972
1973 mutex_lock(&phydev->lock);
1974 phydev->drv->get_stats(phydev, &stats, data);
1975 mutex_unlock(&phydev->lock);
1976
1977 ret = -EFAULT;
1978 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1979 goto out;
1980 useraddr += sizeof(stats);
1981 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1982 goto out;
1983 ret = 0;
1984
1985 out:
1986 vfree(data);
1987 return ret;
1988 }
1989
1990 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1991 {
1992 struct ethtool_perm_addr epaddr;
1993
1994 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1995 return -EFAULT;
1996
1997 if (epaddr.size < dev->addr_len)
1998 return -ETOOSMALL;
1999 epaddr.size = dev->addr_len;
2000
2001 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2002 return -EFAULT;
2003 useraddr += sizeof(epaddr);
2004 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2005 return -EFAULT;
2006 return 0;
2007 }
2008
2009 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2010 u32 cmd, u32 (*actor)(struct net_device *))
2011 {
2012 struct ethtool_value edata = { .cmd = cmd };
2013
2014 if (!actor)
2015 return -EOPNOTSUPP;
2016
2017 edata.data = actor(dev);
2018
2019 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2020 return -EFAULT;
2021 return 0;
2022 }
2023
2024 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2025 void (*actor)(struct net_device *, u32))
2026 {
2027 struct ethtool_value edata;
2028
2029 if (!actor)
2030 return -EOPNOTSUPP;
2031
2032 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2033 return -EFAULT;
2034
2035 actor(dev, edata.data);
2036 return 0;
2037 }
2038
2039 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2040 int (*actor)(struct net_device *, u32))
2041 {
2042 struct ethtool_value edata;
2043
2044 if (!actor)
2045 return -EOPNOTSUPP;
2046
2047 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2048 return -EFAULT;
2049
2050 return actor(dev, edata.data);
2051 }
2052
2053 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2054 char __user *useraddr)
2055 {
2056 struct ethtool_flash efl;
2057
2058 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2059 return -EFAULT;
2060
2061 if (!dev->ethtool_ops->flash_device)
2062 return -EOPNOTSUPP;
2063
2064 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2065
2066 return dev->ethtool_ops->flash_device(dev, &efl);
2067 }
2068
2069 static int ethtool_set_dump(struct net_device *dev,
2070 void __user *useraddr)
2071 {
2072 struct ethtool_dump dump;
2073
2074 if (!dev->ethtool_ops->set_dump)
2075 return -EOPNOTSUPP;
2076
2077 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2078 return -EFAULT;
2079
2080 return dev->ethtool_ops->set_dump(dev, &dump);
2081 }
2082
2083 static int ethtool_get_dump_flag(struct net_device *dev,
2084 void __user *useraddr)
2085 {
2086 int ret;
2087 struct ethtool_dump dump;
2088 const struct ethtool_ops *ops = dev->ethtool_ops;
2089
2090 if (!ops->get_dump_flag)
2091 return -EOPNOTSUPP;
2092
2093 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2094 return -EFAULT;
2095
2096 ret = ops->get_dump_flag(dev, &dump);
2097 if (ret)
2098 return ret;
2099
2100 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2101 return -EFAULT;
2102 return 0;
2103 }
2104
2105 static int ethtool_get_dump_data(struct net_device *dev,
2106 void __user *useraddr)
2107 {
2108 int ret;
2109 __u32 len;
2110 struct ethtool_dump dump, tmp;
2111 const struct ethtool_ops *ops = dev->ethtool_ops;
2112 void *data = NULL;
2113
2114 if (!ops->get_dump_data || !ops->get_dump_flag)
2115 return -EOPNOTSUPP;
2116
2117 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2118 return -EFAULT;
2119
2120 memset(&tmp, 0, sizeof(tmp));
2121 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2122 ret = ops->get_dump_flag(dev, &tmp);
2123 if (ret)
2124 return ret;
2125
2126 len = min(tmp.len, dump.len);
2127 if (!len)
2128 return -EFAULT;
2129
2130 /* Don't ever let the driver think there's more space available
2131 * than it requested with .get_dump_flag().
2132 */
2133 dump.len = len;
2134
2135 /* Always allocate enough space to hold the whole thing so that the
2136 * driver does not need to check the length and bother with partial
2137 * dumping.
2138 */
2139 data = vzalloc(tmp.len);
2140 if (!data)
2141 return -ENOMEM;
2142 ret = ops->get_dump_data(dev, &dump, data);
2143 if (ret)
2144 goto out;
2145
2146 /* There are two sane possibilities:
2147 * 1. The driver's .get_dump_data() does not touch dump.len.
2148 * 2. Or it may set dump.len to how much it really writes, which
2149 * should be tmp.len (or len if it can do a partial dump).
2150 * In any case respond to userspace with the actual length of data
2151 * it's receiving.
2152 */
2153 WARN_ON(dump.len != len && dump.len != tmp.len);
2154 dump.len = len;
2155
2156 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2157 ret = -EFAULT;
2158 goto out;
2159 }
2160 useraddr += offsetof(struct ethtool_dump, data);
2161 if (copy_to_user(useraddr, data, len))
2162 ret = -EFAULT;
2163 out:
2164 vfree(data);
2165 return ret;
2166 }
2167
2168 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2169 {
2170 int err = 0;
2171 struct ethtool_ts_info info;
2172 const struct ethtool_ops *ops = dev->ethtool_ops;
2173 struct phy_device *phydev = dev->phydev;
2174
2175 memset(&info, 0, sizeof(info));
2176 info.cmd = ETHTOOL_GET_TS_INFO;
2177
2178 if (phydev && phydev->drv && phydev->drv->ts_info) {
2179 err = phydev->drv->ts_info(phydev, &info);
2180 } else if (ops->get_ts_info) {
2181 err = ops->get_ts_info(dev, &info);
2182 } else {
2183 info.so_timestamping =
2184 SOF_TIMESTAMPING_RX_SOFTWARE |
2185 SOF_TIMESTAMPING_SOFTWARE;
2186 info.phc_index = -1;
2187 }
2188
2189 if (err)
2190 return err;
2191
2192 if (copy_to_user(useraddr, &info, sizeof(info)))
2193 err = -EFAULT;
2194
2195 return err;
2196 }
2197
2198 static int __ethtool_get_module_info(struct net_device *dev,
2199 struct ethtool_modinfo *modinfo)
2200 {
2201 const struct ethtool_ops *ops = dev->ethtool_ops;
2202 struct phy_device *phydev = dev->phydev;
2203
2204 if (phydev && phydev->drv && phydev->drv->module_info)
2205 return phydev->drv->module_info(phydev, modinfo);
2206
2207 if (ops->get_module_info)
2208 return ops->get_module_info(dev, modinfo);
2209
2210 return -EOPNOTSUPP;
2211 }
2212
2213 static int ethtool_get_module_info(struct net_device *dev,
2214 void __user *useraddr)
2215 {
2216 int ret;
2217 struct ethtool_modinfo modinfo;
2218
2219 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2220 return -EFAULT;
2221
2222 ret = __ethtool_get_module_info(dev, &modinfo);
2223 if (ret)
2224 return ret;
2225
2226 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2227 return -EFAULT;
2228
2229 return 0;
2230 }
2231
2232 static int __ethtool_get_module_eeprom(struct net_device *dev,
2233 struct ethtool_eeprom *ee, u8 *data)
2234 {
2235 const struct ethtool_ops *ops = dev->ethtool_ops;
2236 struct phy_device *phydev = dev->phydev;
2237
2238 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2239 return phydev->drv->module_eeprom(phydev, ee, data);
2240
2241 if (ops->get_module_eeprom)
2242 return ops->get_module_eeprom(dev, ee, data);
2243
2244 return -EOPNOTSUPP;
2245 }
2246
2247 static int ethtool_get_module_eeprom(struct net_device *dev,
2248 void __user *useraddr)
2249 {
2250 int ret;
2251 struct ethtool_modinfo modinfo;
2252
2253 ret = __ethtool_get_module_info(dev, &modinfo);
2254 if (ret)
2255 return ret;
2256
2257 return ethtool_get_any_eeprom(dev, useraddr,
2258 __ethtool_get_module_eeprom,
2259 modinfo.eeprom_len);
2260 }
2261
2262 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2263 {
2264 switch (tuna->id) {
2265 case ETHTOOL_RX_COPYBREAK:
2266 case ETHTOOL_TX_COPYBREAK:
2267 if (tuna->len != sizeof(u32) ||
2268 tuna->type_id != ETHTOOL_TUNABLE_U32)
2269 return -EINVAL;
2270 break;
2271 default:
2272 return -EINVAL;
2273 }
2274
2275 return 0;
2276 }
2277
2278 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2279 {
2280 int ret;
2281 struct ethtool_tunable tuna;
2282 const struct ethtool_ops *ops = dev->ethtool_ops;
2283 void *data;
2284
2285 if (!ops->get_tunable)
2286 return -EOPNOTSUPP;
2287 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2288 return -EFAULT;
2289 ret = ethtool_tunable_valid(&tuna);
2290 if (ret)
2291 return ret;
2292 data = kmalloc(tuna.len, GFP_USER);
2293 if (!data)
2294 return -ENOMEM;
2295 ret = ops->get_tunable(dev, &tuna, data);
2296 if (ret)
2297 goto out;
2298 useraddr += sizeof(tuna);
2299 ret = -EFAULT;
2300 if (copy_to_user(useraddr, data, tuna.len))
2301 goto out;
2302 ret = 0;
2303
2304 out:
2305 kfree(data);
2306 return ret;
2307 }
2308
2309 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2310 {
2311 int ret;
2312 struct ethtool_tunable tuna;
2313 const struct ethtool_ops *ops = dev->ethtool_ops;
2314 void *data;
2315
2316 if (!ops->set_tunable)
2317 return -EOPNOTSUPP;
2318 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2319 return -EFAULT;
2320 ret = ethtool_tunable_valid(&tuna);
2321 if (ret)
2322 return ret;
2323 useraddr += sizeof(tuna);
2324 data = memdup_user(useraddr, tuna.len);
2325 if (IS_ERR(data))
2326 return PTR_ERR(data);
2327 ret = ops->set_tunable(dev, &tuna, data);
2328
2329 kfree(data);
2330 return ret;
2331 }
2332
2333 static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2334 void __user *useraddr,
2335 struct ethtool_per_queue_op *per_queue_opt)
2336 {
2337 u32 bit;
2338 int ret;
2339 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2340
2341 if (!dev->ethtool_ops->get_per_queue_coalesce)
2342 return -EOPNOTSUPP;
2343
2344 useraddr += sizeof(*per_queue_opt);
2345
2346 bitmap_from_u32array(queue_mask,
2347 MAX_NUM_QUEUE,
2348 per_queue_opt->queue_mask,
2349 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2350
2351 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2352 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2353
2354 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2355 if (ret != 0)
2356 return ret;
2357 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2358 return -EFAULT;
2359 useraddr += sizeof(coalesce);
2360 }
2361
2362 return 0;
2363 }
2364
2365 static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2366 void __user *useraddr,
2367 struct ethtool_per_queue_op *per_queue_opt)
2368 {
2369 u32 bit;
2370 int i, ret = 0;
2371 int n_queue;
2372 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2373 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2374
2375 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2376 (!dev->ethtool_ops->get_per_queue_coalesce))
2377 return -EOPNOTSUPP;
2378
2379 useraddr += sizeof(*per_queue_opt);
2380
2381 bitmap_from_u32array(queue_mask,
2382 MAX_NUM_QUEUE,
2383 per_queue_opt->queue_mask,
2384 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2385 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2386 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2387 if (!backup)
2388 return -ENOMEM;
2389
2390 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2391 struct ethtool_coalesce coalesce;
2392
2393 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2394 if (ret != 0)
2395 goto roll_back;
2396
2397 tmp++;
2398
2399 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2400 ret = -EFAULT;
2401 goto roll_back;
2402 }
2403
2404 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2405 if (ret != 0)
2406 goto roll_back;
2407
2408 useraddr += sizeof(coalesce);
2409 }
2410
2411 roll_back:
2412 if (ret != 0) {
2413 tmp = backup;
2414 for_each_set_bit(i, queue_mask, bit) {
2415 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2416 tmp++;
2417 }
2418 }
2419 kfree(backup);
2420
2421 return ret;
2422 }
2423
2424 static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2425 {
2426 struct ethtool_per_queue_op per_queue_opt;
2427
2428 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2429 return -EFAULT;
2430
2431 switch (per_queue_opt.sub_command) {
2432 case ETHTOOL_GCOALESCE:
2433 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2434 case ETHTOOL_SCOALESCE:
2435 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2436 default:
2437 return -EOPNOTSUPP;
2438 };
2439 }
2440
2441 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2442 {
2443 switch (tuna->id) {
2444 case ETHTOOL_PHY_DOWNSHIFT:
2445 if (tuna->len != sizeof(u8) ||
2446 tuna->type_id != ETHTOOL_TUNABLE_U8)
2447 return -EINVAL;
2448 break;
2449 default:
2450 return -EINVAL;
2451 }
2452
2453 return 0;
2454 }
2455
2456 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2457 {
2458 int ret;
2459 struct ethtool_tunable tuna;
2460 struct phy_device *phydev = dev->phydev;
2461 void *data;
2462
2463 if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2464 return -EOPNOTSUPP;
2465
2466 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2467 return -EFAULT;
2468 ret = ethtool_phy_tunable_valid(&tuna);
2469 if (ret)
2470 return ret;
2471 data = kmalloc(tuna.len, GFP_USER);
2472 if (!data)
2473 return -ENOMEM;
2474 mutex_lock(&phydev->lock);
2475 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2476 mutex_unlock(&phydev->lock);
2477 if (ret)
2478 goto out;
2479 useraddr += sizeof(tuna);
2480 ret = -EFAULT;
2481 if (copy_to_user(useraddr, data, tuna.len))
2482 goto out;
2483 ret = 0;
2484
2485 out:
2486 kfree(data);
2487 return ret;
2488 }
2489
2490 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2491 {
2492 int ret;
2493 struct ethtool_tunable tuna;
2494 struct phy_device *phydev = dev->phydev;
2495 void *data;
2496
2497 if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2498 return -EOPNOTSUPP;
2499 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2500 return -EFAULT;
2501 ret = ethtool_phy_tunable_valid(&tuna);
2502 if (ret)
2503 return ret;
2504 useraddr += sizeof(tuna);
2505 data = memdup_user(useraddr, tuna.len);
2506 if (IS_ERR(data))
2507 return PTR_ERR(data);
2508 mutex_lock(&phydev->lock);
2509 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2510 mutex_unlock(&phydev->lock);
2511
2512 kfree(data);
2513 return ret;
2514 }
2515
2516 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2517 {
2518 struct ethtool_fecparam fecparam = { ETHTOOL_GFECPARAM };
2519
2520 if (!dev->ethtool_ops->get_fecparam)
2521 return -EOPNOTSUPP;
2522
2523 dev->ethtool_ops->get_fecparam(dev, &fecparam);
2524
2525 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2526 return -EFAULT;
2527 return 0;
2528 }
2529
2530 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2531 {
2532 struct ethtool_fecparam fecparam;
2533
2534 if (!dev->ethtool_ops->set_fecparam)
2535 return -EOPNOTSUPP;
2536
2537 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2538 return -EFAULT;
2539
2540 return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2541 }
2542
2543 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
2544
2545 int dev_ethtool(struct net *net, struct ifreq *ifr)
2546 {
2547 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2548 void __user *useraddr = ifr->ifr_data;
2549 u32 ethcmd, sub_cmd;
2550 int rc;
2551 netdev_features_t old_features;
2552
2553 if (!dev || !netif_device_present(dev))
2554 return -ENODEV;
2555
2556 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
2557 return -EFAULT;
2558
2559 if (ethcmd == ETHTOOL_PERQUEUE) {
2560 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2561 return -EFAULT;
2562 } else {
2563 sub_cmd = ethcmd;
2564 }
2565 /* Allow some commands to be done by anyone */
2566 switch (sub_cmd) {
2567 case ETHTOOL_GSET:
2568 case ETHTOOL_GDRVINFO:
2569 case ETHTOOL_GMSGLVL:
2570 case ETHTOOL_GLINK:
2571 case ETHTOOL_GCOALESCE:
2572 case ETHTOOL_GRINGPARAM:
2573 case ETHTOOL_GPAUSEPARAM:
2574 case ETHTOOL_GRXCSUM:
2575 case ETHTOOL_GTXCSUM:
2576 case ETHTOOL_GSG:
2577 case ETHTOOL_GSSET_INFO:
2578 case ETHTOOL_GSTRINGS:
2579 case ETHTOOL_GSTATS:
2580 case ETHTOOL_GPHYSTATS:
2581 case ETHTOOL_GTSO:
2582 case ETHTOOL_GPERMADDR:
2583 case ETHTOOL_GGSO:
2584 case ETHTOOL_GGRO:
2585 case ETHTOOL_GFLAGS:
2586 case ETHTOOL_GPFLAGS:
2587 case ETHTOOL_GRXFH:
2588 case ETHTOOL_GRXRINGS:
2589 case ETHTOOL_GRXCLSRLCNT:
2590 case ETHTOOL_GRXCLSRULE:
2591 case ETHTOOL_GRXCLSRLALL:
2592 case ETHTOOL_GRXFHINDIR:
2593 case ETHTOOL_GRSSH:
2594 case ETHTOOL_GFEATURES:
2595 case ETHTOOL_GCHANNELS:
2596 case ETHTOOL_GET_TS_INFO:
2597 case ETHTOOL_GEEE:
2598 case ETHTOOL_GTUNABLE:
2599 case ETHTOOL_PHY_GTUNABLE:
2600 case ETHTOOL_GLINKSETTINGS:
2601 case ETHTOOL_GFECPARAM:
2602 break;
2603 default:
2604 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2605 return -EPERM;
2606 }
2607
2608 if (dev->ethtool_ops->begin) {
2609 rc = dev->ethtool_ops->begin(dev);
2610 if (rc < 0)
2611 return rc;
2612 }
2613 old_features = dev->features;
2614
2615 switch (ethcmd) {
2616 case ETHTOOL_GSET:
2617 rc = ethtool_get_settings(dev, useraddr);
2618 break;
2619 case ETHTOOL_SSET:
2620 rc = ethtool_set_settings(dev, useraddr);
2621 break;
2622 case ETHTOOL_GDRVINFO:
2623 rc = ethtool_get_drvinfo(dev, useraddr);
2624 break;
2625 case ETHTOOL_GREGS:
2626 rc = ethtool_get_regs(dev, useraddr);
2627 break;
2628 case ETHTOOL_GWOL:
2629 rc = ethtool_get_wol(dev, useraddr);
2630 break;
2631 case ETHTOOL_SWOL:
2632 rc = ethtool_set_wol(dev, useraddr);
2633 break;
2634 case ETHTOOL_GMSGLVL:
2635 rc = ethtool_get_value(dev, useraddr, ethcmd,
2636 dev->ethtool_ops->get_msglevel);
2637 break;
2638 case ETHTOOL_SMSGLVL:
2639 rc = ethtool_set_value_void(dev, useraddr,
2640 dev->ethtool_ops->set_msglevel);
2641 break;
2642 case ETHTOOL_GEEE:
2643 rc = ethtool_get_eee(dev, useraddr);
2644 break;
2645 case ETHTOOL_SEEE:
2646 rc = ethtool_set_eee(dev, useraddr);
2647 break;
2648 case ETHTOOL_NWAY_RST:
2649 rc = ethtool_nway_reset(dev);
2650 break;
2651 case ETHTOOL_GLINK:
2652 rc = ethtool_get_link(dev, useraddr);
2653 break;
2654 case ETHTOOL_GEEPROM:
2655 rc = ethtool_get_eeprom(dev, useraddr);
2656 break;
2657 case ETHTOOL_SEEPROM:
2658 rc = ethtool_set_eeprom(dev, useraddr);
2659 break;
2660 case ETHTOOL_GCOALESCE:
2661 rc = ethtool_get_coalesce(dev, useraddr);
2662 break;
2663 case ETHTOOL_SCOALESCE:
2664 rc = ethtool_set_coalesce(dev, useraddr);
2665 break;
2666 case ETHTOOL_GRINGPARAM:
2667 rc = ethtool_get_ringparam(dev, useraddr);
2668 break;
2669 case ETHTOOL_SRINGPARAM:
2670 rc = ethtool_set_ringparam(dev, useraddr);
2671 break;
2672 case ETHTOOL_GPAUSEPARAM:
2673 rc = ethtool_get_pauseparam(dev, useraddr);
2674 break;
2675 case ETHTOOL_SPAUSEPARAM:
2676 rc = ethtool_set_pauseparam(dev, useraddr);
2677 break;
2678 case ETHTOOL_TEST:
2679 rc = ethtool_self_test(dev, useraddr);
2680 break;
2681 case ETHTOOL_GSTRINGS:
2682 rc = ethtool_get_strings(dev, useraddr);
2683 break;
2684 case ETHTOOL_PHYS_ID:
2685 rc = ethtool_phys_id(dev, useraddr);
2686 break;
2687 case ETHTOOL_GSTATS:
2688 rc = ethtool_get_stats(dev, useraddr);
2689 break;
2690 case ETHTOOL_GPERMADDR:
2691 rc = ethtool_get_perm_addr(dev, useraddr);
2692 break;
2693 case ETHTOOL_GFLAGS:
2694 rc = ethtool_get_value(dev, useraddr, ethcmd,
2695 __ethtool_get_flags);
2696 break;
2697 case ETHTOOL_SFLAGS:
2698 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2699 break;
2700 case ETHTOOL_GPFLAGS:
2701 rc = ethtool_get_value(dev, useraddr, ethcmd,
2702 dev->ethtool_ops->get_priv_flags);
2703 break;
2704 case ETHTOOL_SPFLAGS:
2705 rc = ethtool_set_value(dev, useraddr,
2706 dev->ethtool_ops->set_priv_flags);
2707 break;
2708 case ETHTOOL_GRXFH:
2709 case ETHTOOL_GRXRINGS:
2710 case ETHTOOL_GRXCLSRLCNT:
2711 case ETHTOOL_GRXCLSRULE:
2712 case ETHTOOL_GRXCLSRLALL:
2713 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2714 break;
2715 case ETHTOOL_SRXFH:
2716 case ETHTOOL_SRXCLSRLDEL:
2717 case ETHTOOL_SRXCLSRLINS:
2718 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2719 break;
2720 case ETHTOOL_FLASHDEV:
2721 rc = ethtool_flash_device(dev, useraddr);
2722 break;
2723 case ETHTOOL_RESET:
2724 rc = ethtool_reset(dev, useraddr);
2725 break;
2726 case ETHTOOL_GSSET_INFO:
2727 rc = ethtool_get_sset_info(dev, useraddr);
2728 break;
2729 case ETHTOOL_GRXFHINDIR:
2730 rc = ethtool_get_rxfh_indir(dev, useraddr);
2731 break;
2732 case ETHTOOL_SRXFHINDIR:
2733 rc = ethtool_set_rxfh_indir(dev, useraddr);
2734 break;
2735 case ETHTOOL_GRSSH:
2736 rc = ethtool_get_rxfh(dev, useraddr);
2737 break;
2738 case ETHTOOL_SRSSH:
2739 rc = ethtool_set_rxfh(dev, useraddr);
2740 break;
2741 case ETHTOOL_GFEATURES:
2742 rc = ethtool_get_features(dev, useraddr);
2743 break;
2744 case ETHTOOL_SFEATURES:
2745 rc = ethtool_set_features(dev, useraddr);
2746 break;
2747 case ETHTOOL_GTXCSUM:
2748 case ETHTOOL_GRXCSUM:
2749 case ETHTOOL_GSG:
2750 case ETHTOOL_GTSO:
2751 case ETHTOOL_GGSO:
2752 case ETHTOOL_GGRO:
2753 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2754 break;
2755 case ETHTOOL_STXCSUM:
2756 case ETHTOOL_SRXCSUM:
2757 case ETHTOOL_SSG:
2758 case ETHTOOL_STSO:
2759 case ETHTOOL_SGSO:
2760 case ETHTOOL_SGRO:
2761 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2762 break;
2763 case ETHTOOL_GCHANNELS:
2764 rc = ethtool_get_channels(dev, useraddr);
2765 break;
2766 case ETHTOOL_SCHANNELS:
2767 rc = ethtool_set_channels(dev, useraddr);
2768 break;
2769 case ETHTOOL_SET_DUMP:
2770 rc = ethtool_set_dump(dev, useraddr);
2771 break;
2772 case ETHTOOL_GET_DUMP_FLAG:
2773 rc = ethtool_get_dump_flag(dev, useraddr);
2774 break;
2775 case ETHTOOL_GET_DUMP_DATA:
2776 rc = ethtool_get_dump_data(dev, useraddr);
2777 break;
2778 case ETHTOOL_GET_TS_INFO:
2779 rc = ethtool_get_ts_info(dev, useraddr);
2780 break;
2781 case ETHTOOL_GMODULEINFO:
2782 rc = ethtool_get_module_info(dev, useraddr);
2783 break;
2784 case ETHTOOL_GMODULEEEPROM:
2785 rc = ethtool_get_module_eeprom(dev, useraddr);
2786 break;
2787 case ETHTOOL_GTUNABLE:
2788 rc = ethtool_get_tunable(dev, useraddr);
2789 break;
2790 case ETHTOOL_STUNABLE:
2791 rc = ethtool_set_tunable(dev, useraddr);
2792 break;
2793 case ETHTOOL_GPHYSTATS:
2794 rc = ethtool_get_phy_stats(dev, useraddr);
2795 break;
2796 case ETHTOOL_PERQUEUE:
2797 rc = ethtool_set_per_queue(dev, useraddr);
2798 break;
2799 case ETHTOOL_GLINKSETTINGS:
2800 rc = ethtool_get_link_ksettings(dev, useraddr);
2801 break;
2802 case ETHTOOL_SLINKSETTINGS:
2803 rc = ethtool_set_link_ksettings(dev, useraddr);
2804 break;
2805 case ETHTOOL_PHY_GTUNABLE:
2806 rc = get_phy_tunable(dev, useraddr);
2807 break;
2808 case ETHTOOL_PHY_STUNABLE:
2809 rc = set_phy_tunable(dev, useraddr);
2810 break;
2811 case ETHTOOL_GFECPARAM:
2812 rc = ethtool_get_fecparam(dev, useraddr);
2813 break;
2814 case ETHTOOL_SFECPARAM:
2815 rc = ethtool_set_fecparam(dev, useraddr);
2816 break;
2817 default:
2818 rc = -EOPNOTSUPP;
2819 }
2820
2821 if (dev->ethtool_ops->complete)
2822 dev->ethtool_ops->complete(dev);
2823
2824 if (old_features != dev->features)
2825 netdev_features_change(dev);
2826
2827 return rc;
2828 }
Linux kernel stable tree