1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * net/core/ethtool.c - Ethtool ioctl handler
4 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
5 *
6 * This file is where we call all the ethtool_ops commands to get
7 * the information ethtool needs.
8 */
9
10 #include <linux/module.h>
11 #include <linux/types.h>
12 #include <linux/capability.h>
13 #include <linux/errno.h>
14 #include <linux/ethtool.h>
15 #include <linux/netdevice.h>
16 #include <linux/net_tstamp.h>
17 #include <linux/phy.h>
18 #include <linux/bitops.h>
19 #include <linux/uaccess.h>
20 #include <linux/vmalloc.h>
21 #include <linux/sfp.h>
22 #include <linux/slab.h>
23 #include <linux/rtnetlink.h>
24 #include <linux/sched/signal.h>
25 #include <linux/net.h>
26 #include <net/devlink.h>
27 #include <net/xdp_sock.h>
28 #include <net/flow_offload.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
ethtool_op_get_link(struct net_device * dev)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
ethtool_op_get_ts_info(struct net_device * dev,struct ethtool_ts_info * info)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_GRO_HW_BIT] = "rx-gro-hw",
77 [NETIF_F_LRO_BIT] = "rx-lro",
78
79 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation",
80 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
81 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
82 [NETIF_F_TSO_MANGLEID_BIT] = "tx-tcp-mangleid-segmentation",
83 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
84 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
85 [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
86 [NETIF_F_GSO_GRE_CSUM_BIT] = "tx-gre-csum-segmentation",
87 [NETIF_F_GSO_IPXIP4_BIT] = "tx-ipxip4-segmentation",
88 [NETIF_F_GSO_IPXIP6_BIT] = "tx-ipxip6-segmentation",
89 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
90 [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
91 [NETIF_F_GSO_PARTIAL_BIT] = "tx-gso-partial",
92 [NETIF_F_GSO_SCTP_BIT] = "tx-sctp-segmentation",
93 [NETIF_F_GSO_ESP_BIT] = "tx-esp-segmentation",
94 [NETIF_F_GSO_UDP_L4_BIT] = "tx-udp-segmentation",
95
96 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
97 [NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
98 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
99 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
100 [NETIF_F_RXHASH_BIT] = "rx-hashing",
101 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
102 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
103 [NETIF_F_LOOPBACK_BIT] = "loopback",
104 [NETIF_F_RXFCS_BIT] = "rx-fcs",
105 [NETIF_F_RXALL_BIT] = "rx-all",
106 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
107 [NETIF_F_HW_TC_BIT] = "hw-tc-offload",
108 [NETIF_F_HW_ESP_BIT] = "esp-hw-offload",
109 [NETIF_F_HW_ESP_TX_CSUM_BIT] = "esp-tx-csum-hw-offload",
110 [NETIF_F_RX_UDP_TUNNEL_PORT_BIT] = "rx-udp_tunnel-port-offload",
111 [NETIF_F_HW_TLS_RECORD_BIT] = "tls-hw-record",
112 [NETIF_F_HW_TLS_TX_BIT] = "tls-hw-tx-offload",
113 [NETIF_F_HW_TLS_RX_BIT] = "tls-hw-rx-offload",
114 };
115
116 static const char
117 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
118 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
119 [ETH_RSS_HASH_XOR_BIT] = "xor",
120 [ETH_RSS_HASH_CRC32_BIT] = "crc32",
121 };
122
123 static const char
124 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
125 [ETHTOOL_ID_UNSPEC] = "Unspec",
126 [ETHTOOL_RX_COPYBREAK] = "rx-copybreak",
127 [ETHTOOL_TX_COPYBREAK] = "tx-copybreak",
128 [ETHTOOL_PFC_PREVENTION_TOUT] = "pfc-prevention-tout",
129 };
130
131 static const char
132 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
133 [ETHTOOL_ID_UNSPEC] = "Unspec",
134 [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
135 [ETHTOOL_PHY_FAST_LINK_DOWN] = "phy-fast-link-down",
136 [ETHTOOL_PHY_EDPD] = "phy-energy-detect-power-down",
137 };
138
ethtool_get_features(struct net_device * dev,void __user * useraddr)139 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
140 {
141 struct ethtool_gfeatures cmd = {
142 .cmd = ETHTOOL_GFEATURES,
143 .size = ETHTOOL_DEV_FEATURE_WORDS,
144 };
145 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
146 u32 __user *sizeaddr;
147 u32 copy_size;
148 int i;
149
150 /* in case feature bits run out again */
151 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
152
153 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
154 features[i].available = (u32)(dev->hw_features >> (32 * i));
155 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
156 features[i].active = (u32)(dev->features >> (32 * i));
157 features[i].never_changed =
158 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
159 }
160
161 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
162 if (get_user(copy_size, sizeaddr))
163 return -EFAULT;
164
165 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
166 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
167
168 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
169 return -EFAULT;
170 useraddr += sizeof(cmd);
171 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
172 return -EFAULT;
173
174 return 0;
175 }
176
ethtool_set_features(struct net_device * dev,void __user * useraddr)177 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
178 {
179 struct ethtool_sfeatures cmd;
180 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
181 netdev_features_t wanted = 0, valid = 0;
182 int i, ret = 0;
183
184 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
185 return -EFAULT;
186 useraddr += sizeof(cmd);
187
188 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
189 return -EINVAL;
190
191 if (copy_from_user(features, useraddr, sizeof(features)))
192 return -EFAULT;
193
194 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
195 valid |= (netdev_features_t)features[i].valid << (32 * i);
196 wanted |= (netdev_features_t)features[i].requested << (32 * i);
197 }
198
199 if (valid & ~NETIF_F_ETHTOOL_BITS)
200 return -EINVAL;
201
202 if (valid & ~dev->hw_features) {
203 valid &= dev->hw_features;
204 ret |= ETHTOOL_F_UNSUPPORTED;
205 }
206
207 dev->wanted_features &= ~valid;
208 dev->wanted_features |= wanted & valid;
209 __netdev_update_features(dev);
210
211 if ((dev->wanted_features ^ dev->features) & valid)
212 ret |= ETHTOOL_F_WISH;
213
214 return ret;
215 }
216
__ethtool_get_sset_count(struct net_device * dev,int sset)217 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
218 {
219 const struct ethtool_ops *ops = dev->ethtool_ops;
220
221 if (sset == ETH_SS_FEATURES)
222 return ARRAY_SIZE(netdev_features_strings);
223
224 if (sset == ETH_SS_RSS_HASH_FUNCS)
225 return ARRAY_SIZE(rss_hash_func_strings);
226
227 if (sset == ETH_SS_TUNABLES)
228 return ARRAY_SIZE(tunable_strings);
229
230 if (sset == ETH_SS_PHY_TUNABLES)
231 return ARRAY_SIZE(phy_tunable_strings);
232
233 if (sset == ETH_SS_PHY_STATS && dev->phydev &&
234 !ops->get_ethtool_phy_stats)
235 return phy_ethtool_get_sset_count(dev->phydev);
236
237 if (ops->get_sset_count && ops->get_strings)
238 return ops->get_sset_count(dev, sset);
239 else
240 return -EOPNOTSUPP;
241 }
242
__ethtool_get_strings(struct net_device * dev,u32 stringset,u8 * data)243 static void __ethtool_get_strings(struct net_device *dev,
244 u32 stringset, u8 *data)
245 {
246 const struct ethtool_ops *ops = dev->ethtool_ops;
247
248 if (stringset == ETH_SS_FEATURES)
249 memcpy(data, netdev_features_strings,
250 sizeof(netdev_features_strings));
251 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
252 memcpy(data, rss_hash_func_strings,
253 sizeof(rss_hash_func_strings));
254 else if (stringset == ETH_SS_TUNABLES)
255 memcpy(data, tunable_strings, sizeof(tunable_strings));
256 else if (stringset == ETH_SS_PHY_TUNABLES)
257 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
258 else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
259 !ops->get_ethtool_phy_stats)
260 phy_ethtool_get_strings(dev->phydev, data);
261 else
262 /* ops->get_strings is valid because checked earlier */
263 ops->get_strings(dev, stringset, data);
264 }
265
ethtool_get_feature_mask(u32 eth_cmd)266 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
267 {
268 /* feature masks of legacy discrete ethtool ops */
269
270 switch (eth_cmd) {
271 case ETHTOOL_GTXCSUM:
272 case ETHTOOL_STXCSUM:
273 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
274 case ETHTOOL_GRXCSUM:
275 case ETHTOOL_SRXCSUM:
276 return NETIF_F_RXCSUM;
277 case ETHTOOL_GSG:
278 case ETHTOOL_SSG:
279 return NETIF_F_SG;
280 case ETHTOOL_GTSO:
281 case ETHTOOL_STSO:
282 return NETIF_F_ALL_TSO;
283 case ETHTOOL_GGSO:
284 case ETHTOOL_SGSO:
285 return NETIF_F_GSO;
286 case ETHTOOL_GGRO:
287 case ETHTOOL_SGRO:
288 return NETIF_F_GRO;
289 default:
290 BUG();
291 }
292 }
293
ethtool_get_one_feature(struct net_device * dev,char __user * useraddr,u32 ethcmd)294 static int ethtool_get_one_feature(struct net_device *dev,
295 char __user *useraddr, u32 ethcmd)
296 {
297 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
298 struct ethtool_value edata = {
299 .cmd = ethcmd,
300 .data = !!(dev->features & mask),
301 };
302
303 if (copy_to_user(useraddr, &edata, sizeof(edata)))
304 return -EFAULT;
305 return 0;
306 }
307
ethtool_set_one_feature(struct net_device * dev,void __user * useraddr,u32 ethcmd)308 static int ethtool_set_one_feature(struct net_device *dev,
309 void __user *useraddr, u32 ethcmd)
310 {
311 struct ethtool_value edata;
312 netdev_features_t mask;
313
314 if (copy_from_user(&edata, useraddr, sizeof(edata)))
315 return -EFAULT;
316
317 mask = ethtool_get_feature_mask(ethcmd);
318 mask &= dev->hw_features;
319 if (!mask)
320 return -EOPNOTSUPP;
321
322 if (edata.data)
323 dev->wanted_features |= mask;
324 else
325 dev->wanted_features &= ~mask;
326
327 __netdev_update_features(dev);
328
329 return 0;
330 }
331
332 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
333 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
334 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
335 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
336 NETIF_F_RXHASH)
337
__ethtool_get_flags(struct net_device * dev)338 static u32 __ethtool_get_flags(struct net_device *dev)
339 {
340 u32 flags = 0;
341
342 if (dev->features & NETIF_F_LRO)
343 flags |= ETH_FLAG_LRO;
344 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
345 flags |= ETH_FLAG_RXVLAN;
346 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
347 flags |= ETH_FLAG_TXVLAN;
348 if (dev->features & NETIF_F_NTUPLE)
349 flags |= ETH_FLAG_NTUPLE;
350 if (dev->features & NETIF_F_RXHASH)
351 flags |= ETH_FLAG_RXHASH;
352
353 return flags;
354 }
355
__ethtool_set_flags(struct net_device * dev,u32 data)356 static int __ethtool_set_flags(struct net_device *dev, u32 data)
357 {
358 netdev_features_t features = 0, changed;
359
360 if (data & ~ETH_ALL_FLAGS)
361 return -EINVAL;
362
363 if (data & ETH_FLAG_LRO)
364 features |= NETIF_F_LRO;
365 if (data & ETH_FLAG_RXVLAN)
366 features |= NETIF_F_HW_VLAN_CTAG_RX;
367 if (data & ETH_FLAG_TXVLAN)
368 features |= NETIF_F_HW_VLAN_CTAG_TX;
369 if (data & ETH_FLAG_NTUPLE)
370 features |= NETIF_F_NTUPLE;
371 if (data & ETH_FLAG_RXHASH)
372 features |= NETIF_F_RXHASH;
373
374 /* allow changing only bits set in hw_features */
375 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
376 if (changed & ~dev->hw_features)
377 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
378
379 dev->wanted_features =
380 (dev->wanted_features & ~changed) | (features & changed);
381
382 __netdev_update_features(dev);
383
384 return 0;
385 }
386
387 /* 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)388 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
389 struct ethtool_link_ksettings *src)
390 {
391 unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
392 unsigned int idx = 0;
393
394 for (; idx < size; idx++) {
395 dst->link_modes.supported[idx] &=
396 src->link_modes.supported[idx];
397 dst->link_modes.advertising[idx] &=
398 src->link_modes.advertising[idx];
399 }
400 }
401 EXPORT_SYMBOL(ethtool_intersect_link_masks);
402
ethtool_convert_legacy_u32_to_link_mode(unsigned long * dst,u32 legacy_u32)403 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
404 u32 legacy_u32)
405 {
406 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
407 dst[0] = legacy_u32;
408 }
409 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
410
411 /* 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)412 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
413 const unsigned long *src)
414 {
415 bool retval = true;
416
417 /* TODO: following test will soon always be true */
418 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
419 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
420
421 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
422 bitmap_fill(ext, 32);
423 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
424 if (bitmap_intersects(ext, src,
425 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
426 /* src mask goes beyond bit 31 */
427 retval = false;
428 }
429 }
430 *legacy_u32 = src[0];
431 return retval;
432 }
433 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
434
435 /* return false if legacy contained non-0 deprecated fields
436 * maxtxpkt/maxrxpkt. rest of ksettings always updated
437 */
438 static bool
convert_legacy_settings_to_link_ksettings(struct ethtool_link_ksettings * link_ksettings,const struct ethtool_cmd * legacy_settings)439 convert_legacy_settings_to_link_ksettings(
440 struct ethtool_link_ksettings *link_ksettings,
441 const struct ethtool_cmd *legacy_settings)
442 {
443 bool retval = true;
444
445 memset(link_ksettings, 0, sizeof(*link_ksettings));
446
447 /* This is used to tell users that driver is still using these
448 * deprecated legacy fields, and they should not use
449 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
450 */
451 if (legacy_settings->maxtxpkt ||
452 legacy_settings->maxrxpkt)
453 retval = false;
454
455 ethtool_convert_legacy_u32_to_link_mode(
456 link_ksettings->link_modes.supported,
457 legacy_settings->supported);
458 ethtool_convert_legacy_u32_to_link_mode(
459 link_ksettings->link_modes.advertising,
460 legacy_settings->advertising);
461 ethtool_convert_legacy_u32_to_link_mode(
462 link_ksettings->link_modes.lp_advertising,
463 legacy_settings->lp_advertising);
464 link_ksettings->base.speed
465 = ethtool_cmd_speed(legacy_settings);
466 link_ksettings->base.duplex
467 = legacy_settings->duplex;
468 link_ksettings->base.port
469 = legacy_settings->port;
470 link_ksettings->base.phy_address
471 = legacy_settings->phy_address;
472 link_ksettings->base.autoneg
473 = legacy_settings->autoneg;
474 link_ksettings->base.mdio_support
475 = legacy_settings->mdio_support;
476 link_ksettings->base.eth_tp_mdix
477 = legacy_settings->eth_tp_mdix;
478 link_ksettings->base.eth_tp_mdix_ctrl
479 = legacy_settings->eth_tp_mdix_ctrl;
480 return retval;
481 }
482
483 /* return false if ksettings link modes had higher bits
484 * set. legacy_settings always updated (best effort)
485 */
486 static bool
convert_link_ksettings_to_legacy_settings(struct ethtool_cmd * legacy_settings,const struct ethtool_link_ksettings * link_ksettings)487 convert_link_ksettings_to_legacy_settings(
488 struct ethtool_cmd *legacy_settings,
489 const struct ethtool_link_ksettings *link_ksettings)
490 {
491 bool retval = true;
492
493 memset(legacy_settings, 0, sizeof(*legacy_settings));
494 /* this also clears the deprecated fields in legacy structure:
495 * __u8 transceiver;
496 * __u32 maxtxpkt;
497 * __u32 maxrxpkt;
498 */
499
500 retval &= ethtool_convert_link_mode_to_legacy_u32(
501 &legacy_settings->supported,
502 link_ksettings->link_modes.supported);
503 retval &= ethtool_convert_link_mode_to_legacy_u32(
504 &legacy_settings->advertising,
505 link_ksettings->link_modes.advertising);
506 retval &= ethtool_convert_link_mode_to_legacy_u32(
507 &legacy_settings->lp_advertising,
508 link_ksettings->link_modes.lp_advertising);
509 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
510 legacy_settings->duplex
511 = link_ksettings->base.duplex;
512 legacy_settings->port
513 = link_ksettings->base.port;
514 legacy_settings->phy_address
515 = link_ksettings->base.phy_address;
516 legacy_settings->autoneg
517 = link_ksettings->base.autoneg;
518 legacy_settings->mdio_support
519 = link_ksettings->base.mdio_support;
520 legacy_settings->eth_tp_mdix
521 = link_ksettings->base.eth_tp_mdix;
522 legacy_settings->eth_tp_mdix_ctrl
523 = link_ksettings->base.eth_tp_mdix_ctrl;
524 legacy_settings->transceiver
525 = link_ksettings->base.transceiver;
526 return retval;
527 }
528
529 /* number of 32-bit words to store the user's link mode bitmaps */
530 #define __ETHTOOL_LINK_MODE_MASK_NU32 \
531 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
532
533 /* layout of the struct passed from/to userland */
534 struct ethtool_link_usettings {
535 struct ethtool_link_settings base;
536 struct {
537 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
538 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
539 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
540 } link_modes;
541 };
542
543 /* Internal kernel helper to query a device ethtool_link_settings. */
__ethtool_get_link_ksettings(struct net_device * dev,struct ethtool_link_ksettings * link_ksettings)544 int __ethtool_get_link_ksettings(struct net_device *dev,
545 struct ethtool_link_ksettings *link_ksettings)
546 {
547 ASSERT_RTNL();
548
549 if (!dev->ethtool_ops->get_link_ksettings)
550 return -EOPNOTSUPP;
551
552 memset(link_ksettings, 0, sizeof(*link_ksettings));
553 return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
554 }
555 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
556
557 /* convert ethtool_link_usettings in user space to a kernel internal
558 * ethtool_link_ksettings. return 0 on success, errno on error.
559 */
load_link_ksettings_from_user(struct ethtool_link_ksettings * to,const void __user * from)560 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
561 const void __user *from)
562 {
563 struct ethtool_link_usettings link_usettings;
564
565 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
566 return -EFAULT;
567
568 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
569 bitmap_from_arr32(to->link_modes.supported,
570 link_usettings.link_modes.supported,
571 __ETHTOOL_LINK_MODE_MASK_NBITS);
572 bitmap_from_arr32(to->link_modes.advertising,
573 link_usettings.link_modes.advertising,
574 __ETHTOOL_LINK_MODE_MASK_NBITS);
575 bitmap_from_arr32(to->link_modes.lp_advertising,
576 link_usettings.link_modes.lp_advertising,
577 __ETHTOOL_LINK_MODE_MASK_NBITS);
578
579 return 0;
580 }
581
582 /* convert a kernel internal ethtool_link_ksettings to
583 * ethtool_link_usettings in user space. return 0 on success, errno on
584 * error.
585 */
586 static int
store_link_ksettings_for_user(void __user * to,const struct ethtool_link_ksettings * from)587 store_link_ksettings_for_user(void __user *to,
588 const struct ethtool_link_ksettings *from)
589 {
590 struct ethtool_link_usettings link_usettings;
591
592 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
593 bitmap_to_arr32(link_usettings.link_modes.supported,
594 from->link_modes.supported,
595 __ETHTOOL_LINK_MODE_MASK_NBITS);
596 bitmap_to_arr32(link_usettings.link_modes.advertising,
597 from->link_modes.advertising,
598 __ETHTOOL_LINK_MODE_MASK_NBITS);
599 bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
600 from->link_modes.lp_advertising,
601 __ETHTOOL_LINK_MODE_MASK_NBITS);
602
603 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
604 return -EFAULT;
605
606 return 0;
607 }
608
609 /* Query device for its ethtool_link_settings. */
ethtool_get_link_ksettings(struct net_device * dev,void __user * useraddr)610 static int ethtool_get_link_ksettings(struct net_device *dev,
611 void __user *useraddr)
612 {
613 int err = 0;
614 struct ethtool_link_ksettings link_ksettings;
615
616 ASSERT_RTNL();
617 if (!dev->ethtool_ops->get_link_ksettings)
618 return -EOPNOTSUPP;
619
620 /* handle bitmap nbits handshake */
621 if (copy_from_user(&link_ksettings.base, useraddr,
622 sizeof(link_ksettings.base)))
623 return -EFAULT;
624
625 if (__ETHTOOL_LINK_MODE_MASK_NU32
626 != link_ksettings.base.link_mode_masks_nwords) {
627 /* wrong link mode nbits requested */
628 memset(&link_ksettings, 0, sizeof(link_ksettings));
629 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
630 /* send back number of words required as negative val */
631 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
632 "need too many bits for link modes!");
633 link_ksettings.base.link_mode_masks_nwords
634 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
635
636 /* copy the base fields back to user, not the link
637 * mode bitmaps
638 */
639 if (copy_to_user(useraddr, &link_ksettings.base,
640 sizeof(link_ksettings.base)))
641 return -EFAULT;
642
643 return 0;
644 }
645
646 /* handshake successful: user/kernel agree on
647 * link_mode_masks_nwords
648 */
649
650 memset(&link_ksettings, 0, sizeof(link_ksettings));
651 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
652 if (err < 0)
653 return err;
654
655 /* make sure we tell the right values to user */
656 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
657 link_ksettings.base.link_mode_masks_nwords
658 = __ETHTOOL_LINK_MODE_MASK_NU32;
659
660 return store_link_ksettings_for_user(useraddr, &link_ksettings);
661 }
662
663 /* Update device ethtool_link_settings. */
ethtool_set_link_ksettings(struct net_device * dev,void __user * useraddr)664 static int ethtool_set_link_ksettings(struct net_device *dev,
665 void __user *useraddr)
666 {
667 int err;
668 struct ethtool_link_ksettings link_ksettings;
669
670 ASSERT_RTNL();
671
672 if (!dev->ethtool_ops->set_link_ksettings)
673 return -EOPNOTSUPP;
674
675 /* make sure nbits field has expected value */
676 if (copy_from_user(&link_ksettings.base, useraddr,
677 sizeof(link_ksettings.base)))
678 return -EFAULT;
679
680 if (__ETHTOOL_LINK_MODE_MASK_NU32
681 != link_ksettings.base.link_mode_masks_nwords)
682 return -EINVAL;
683
684 /* copy the whole structure, now that we know it has expected
685 * format
686 */
687 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
688 if (err)
689 return err;
690
691 /* re-check nwords field, just in case */
692 if (__ETHTOOL_LINK_MODE_MASK_NU32
693 != link_ksettings.base.link_mode_masks_nwords)
694 return -EINVAL;
695
696 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
697 }
698
699 /* Query device for its ethtool_cmd settings.
700 *
701 * Backward compatibility note: for compatibility with legacy ethtool, this is
702 * now implemented via get_link_ksettings. When driver reports higher link mode
703 * bits, a kernel warning is logged once (with name of 1st driver/device) to
704 * recommend user to upgrade ethtool, but the command is successful (only the
705 * lower link mode bits reported back to user). Deprecated fields from
706 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
707 */
ethtool_get_settings(struct net_device * dev,void __user * useraddr)708 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
709 {
710 struct ethtool_link_ksettings link_ksettings;
711 struct ethtool_cmd cmd;
712 int err;
713
714 ASSERT_RTNL();
715 if (!dev->ethtool_ops->get_link_ksettings)
716 return -EOPNOTSUPP;
717
718 memset(&link_ksettings, 0, sizeof(link_ksettings));
719 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
720 if (err < 0)
721 return err;
722 convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
723
724 /* send a sensible cmd tag back to user */
725 cmd.cmd = ETHTOOL_GSET;
726
727 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
728 return -EFAULT;
729
730 return 0;
731 }
732
733 /* Update device link settings with given ethtool_cmd.
734 *
735 * Backward compatibility note: for compatibility with legacy ethtool, this is
736 * now always implemented via set_link_settings. When user's request updates
737 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
738 * warning is logged once (with name of 1st driver/device) to recommend user to
739 * upgrade ethtool, and the request is rejected.
740 */
ethtool_set_settings(struct net_device * dev,void __user * useraddr)741 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
742 {
743 struct ethtool_link_ksettings link_ksettings;
744 struct ethtool_cmd cmd;
745
746 ASSERT_RTNL();
747
748 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
749 return -EFAULT;
750 if (!dev->ethtool_ops->set_link_ksettings)
751 return -EOPNOTSUPP;
752
753 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
754 return -EINVAL;
755 link_ksettings.base.link_mode_masks_nwords =
756 __ETHTOOL_LINK_MODE_MASK_NU32;
757 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
758 }
759
ethtool_get_drvinfo(struct net_device * dev,void __user * useraddr)760 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
761 void __user *useraddr)
762 {
763 struct ethtool_drvinfo info;
764 const struct ethtool_ops *ops = dev->ethtool_ops;
765
766 memset(&info, 0, sizeof(info));
767 info.cmd = ETHTOOL_GDRVINFO;
768 if (ops->get_drvinfo) {
769 ops->get_drvinfo(dev, &info);
770 } else if (dev->dev.parent && dev->dev.parent->driver) {
771 strlcpy(info.bus_info, dev_name(dev->dev.parent),
772 sizeof(info.bus_info));
773 strlcpy(info.driver, dev->dev.parent->driver->name,
774 sizeof(info.driver));
775 } else {
776 return -EOPNOTSUPP;
777 }
778
779 /*
780 * this method of obtaining string set info is deprecated;
781 * Use ETHTOOL_GSSET_INFO instead.
782 */
783 if (ops->get_sset_count) {
784 int rc;
785
786 rc = ops->get_sset_count(dev, ETH_SS_TEST);
787 if (rc >= 0)
788 info.testinfo_len = rc;
789 rc = ops->get_sset_count(dev, ETH_SS_STATS);
790 if (rc >= 0)
791 info.n_stats = rc;
792 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
793 if (rc >= 0)
794 info.n_priv_flags = rc;
795 }
796 if (ops->get_regs_len) {
797 int ret = ops->get_regs_len(dev);
798
799 if (ret > 0)
800 info.regdump_len = ret;
801 }
802
803 if (ops->get_eeprom_len)
804 info.eedump_len = ops->get_eeprom_len(dev);
805
806 if (!info.fw_version[0])
807 devlink_compat_running_version(dev, info.fw_version,
808 sizeof(info.fw_version));
809
810 if (copy_to_user(useraddr, &info, sizeof(info)))
811 return -EFAULT;
812 return 0;
813 }
814
ethtool_get_sset_info(struct net_device * dev,void __user * useraddr)815 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
816 void __user *useraddr)
817 {
818 struct ethtool_sset_info info;
819 u64 sset_mask;
820 int i, idx = 0, n_bits = 0, ret, rc;
821 u32 *info_buf = NULL;
822
823 if (copy_from_user(&info, useraddr, sizeof(info)))
824 return -EFAULT;
825
826 /* store copy of mask, because we zero struct later on */
827 sset_mask = info.sset_mask;
828 if (!sset_mask)
829 return 0;
830
831 /* calculate size of return buffer */
832 n_bits = hweight64(sset_mask);
833
834 memset(&info, 0, sizeof(info));
835 info.cmd = ETHTOOL_GSSET_INFO;
836
837 info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
838 if (!info_buf)
839 return -ENOMEM;
840
841 /*
842 * fill return buffer based on input bitmask and successful
843 * get_sset_count return
844 */
845 for (i = 0; i < 64; i++) {
846 if (!(sset_mask & (1ULL << i)))
847 continue;
848
849 rc = __ethtool_get_sset_count(dev, i);
850 if (rc >= 0) {
851 info.sset_mask |= (1ULL << i);
852 info_buf[idx++] = rc;
853 }
854 }
855
856 ret = -EFAULT;
857 if (copy_to_user(useraddr, &info, sizeof(info)))
858 goto out;
859
860 useraddr += offsetof(struct ethtool_sset_info, data);
861 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
862 goto out;
863
864 ret = 0;
865
866 out:
867 kfree(info_buf);
868 return ret;
869 }
870
ethtool_set_rxnfc(struct net_device * dev,u32 cmd,void __user * useraddr)871 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
872 u32 cmd, void __user *useraddr)
873 {
874 struct ethtool_rxnfc info;
875 size_t info_size = sizeof(info);
876 int rc;
877
878 if (!dev->ethtool_ops->set_rxnfc)
879 return -EOPNOTSUPP;
880
881 /* struct ethtool_rxnfc was originally defined for
882 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
883 * members. User-space might still be using that
884 * definition. */
885 if (cmd == ETHTOOL_SRXFH)
886 info_size = (offsetof(struct ethtool_rxnfc, data) +
887 sizeof(info.data));
888
889 if (copy_from_user(&info, useraddr, info_size))
890 return -EFAULT;
891
892 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
893 if (rc)
894 return rc;
895
896 if (cmd == ETHTOOL_SRXCLSRLINS &&
897 copy_to_user(useraddr, &info, info_size))
898 return -EFAULT;
899
900 return 0;
901 }
902
ethtool_get_rxnfc(struct net_device * dev,u32 cmd,void __user * useraddr)903 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
904 u32 cmd, void __user *useraddr)
905 {
906 struct ethtool_rxnfc info;
907 size_t info_size = sizeof(info);
908 const struct ethtool_ops *ops = dev->ethtool_ops;
909 int ret;
910 void *rule_buf = NULL;
911
912 if (!ops->get_rxnfc)
913 return -EOPNOTSUPP;
914
915 /* struct ethtool_rxnfc was originally defined for
916 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
917 * members. User-space might still be using that
918 * definition. */
919 if (cmd == ETHTOOL_GRXFH)
920 info_size = (offsetof(struct ethtool_rxnfc, data) +
921 sizeof(info.data));
922
923 if (copy_from_user(&info, useraddr, info_size))
924 return -EFAULT;
925
926 /* If FLOW_RSS was requested then user-space must be using the
927 * new definition, as FLOW_RSS is newer.
928 */
929 if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
930 info_size = sizeof(info);
931 if (copy_from_user(&info, useraddr, info_size))
932 return -EFAULT;
933 /* Since malicious users may modify the original data,
934 * we need to check whether FLOW_RSS is still requested.
935 */
936 if (!(info.flow_type & FLOW_RSS))
937 return -EINVAL;
938 }
939
940 if (info.cmd != cmd)
941 return -EINVAL;
942
943 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
944 if (info.rule_cnt > 0) {
945 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
946 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
947 GFP_USER);
948 if (!rule_buf)
949 return -ENOMEM;
950 }
951 }
952
953 ret = ops->get_rxnfc(dev, &info, rule_buf);
954 if (ret < 0)
955 goto err_out;
956
957 ret = -EFAULT;
958 if (copy_to_user(useraddr, &info, info_size))
959 goto err_out;
960
961 if (rule_buf) {
962 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
963 if (copy_to_user(useraddr, rule_buf,
964 info.rule_cnt * sizeof(u32)))
965 goto err_out;
966 }
967 ret = 0;
968
969 err_out:
970 kfree(rule_buf);
971
972 return ret;
973 }
974
ethtool_copy_validate_indir(u32 * indir,void __user * useraddr,struct ethtool_rxnfc * rx_rings,u32 size)975 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
976 struct ethtool_rxnfc *rx_rings,
977 u32 size)
978 {
979 int i;
980
981 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
982 return -EFAULT;
983
984 /* Validate ring indices */
985 for (i = 0; i < size; i++)
986 if (indir[i] >= rx_rings->data)
987 return -EINVAL;
988
989 return 0;
990 }
991
992 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
993
netdev_rss_key_fill(void * buffer,size_t len)994 void netdev_rss_key_fill(void *buffer, size_t len)
995 {
996 BUG_ON(len > sizeof(netdev_rss_key));
997 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
998 memcpy(buffer, netdev_rss_key, len);
999 }
1000 EXPORT_SYMBOL(netdev_rss_key_fill);
1001
ethtool_get_max_rxfh_channel(struct net_device * dev,u32 * max)1002 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1003 {
1004 u32 dev_size, current_max = 0;
1005 u32 *indir;
1006 int ret;
1007
1008 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1009 !dev->ethtool_ops->get_rxfh)
1010 return -EOPNOTSUPP;
1011 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1012 if (dev_size == 0)
1013 return -EOPNOTSUPP;
1014
1015 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1016 if (!indir)
1017 return -ENOMEM;
1018
1019 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1020 if (ret)
1021 goto out;
1022
1023 while (dev_size--)
1024 current_max = max(current_max, indir[dev_size]);
1025
1026 *max = current_max;
1027
1028 out:
1029 kfree(indir);
1030 return ret;
1031 }
1032
ethtool_get_rxfh_indir(struct net_device * dev,void __user * useraddr)1033 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1034 void __user *useraddr)
1035 {
1036 u32 user_size, dev_size;
1037 u32 *indir;
1038 int ret;
1039
1040 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1041 !dev->ethtool_ops->get_rxfh)
1042 return -EOPNOTSUPP;
1043 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1044 if (dev_size == 0)
1045 return -EOPNOTSUPP;
1046
1047 if (copy_from_user(&user_size,
1048 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1049 sizeof(user_size)))
1050 return -EFAULT;
1051
1052 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1053 &dev_size, sizeof(dev_size)))
1054 return -EFAULT;
1055
1056 /* If the user buffer size is 0, this is just a query for the
1057 * device table size. Otherwise, if it's smaller than the
1058 * device table size it's an error.
1059 */
1060 if (user_size < dev_size)
1061 return user_size == 0 ? 0 : -EINVAL;
1062
1063 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1064 if (!indir)
1065 return -ENOMEM;
1066
1067 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1068 if (ret)
1069 goto out;
1070
1071 if (copy_to_user(useraddr +
1072 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1073 indir, dev_size * sizeof(indir[0])))
1074 ret = -EFAULT;
1075
1076 out:
1077 kfree(indir);
1078 return ret;
1079 }
1080
ethtool_set_rxfh_indir(struct net_device * dev,void __user * useraddr)1081 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1082 void __user *useraddr)
1083 {
1084 struct ethtool_rxnfc rx_rings;
1085 u32 user_size, dev_size, i;
1086 u32 *indir;
1087 const struct ethtool_ops *ops = dev->ethtool_ops;
1088 int ret;
1089 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1090
1091 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1092 !ops->get_rxnfc)
1093 return -EOPNOTSUPP;
1094
1095 dev_size = ops->get_rxfh_indir_size(dev);
1096 if (dev_size == 0)
1097 return -EOPNOTSUPP;
1098
1099 if (copy_from_user(&user_size,
1100 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1101 sizeof(user_size)))
1102 return -EFAULT;
1103
1104 if (user_size != 0 && user_size != dev_size)
1105 return -EINVAL;
1106
1107 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1108 if (!indir)
1109 return -ENOMEM;
1110
1111 rx_rings.cmd = ETHTOOL_GRXRINGS;
1112 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1113 if (ret)
1114 goto out;
1115
1116 if (user_size == 0) {
1117 for (i = 0; i < dev_size; i++)
1118 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1119 } else {
1120 ret = ethtool_copy_validate_indir(indir,
1121 useraddr + ringidx_offset,
1122 &rx_rings,
1123 dev_size);
1124 if (ret)
1125 goto out;
1126 }
1127
1128 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1129 if (ret)
1130 goto out;
1131
1132 /* indicate whether rxfh was set to default */
1133 if (user_size == 0)
1134 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1135 else
1136 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1137
1138 out:
1139 kfree(indir);
1140 return ret;
1141 }
1142
ethtool_get_rxfh(struct net_device * dev,void __user * useraddr)1143 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1144 void __user *useraddr)
1145 {
1146 int ret;
1147 const struct ethtool_ops *ops = dev->ethtool_ops;
1148 u32 user_indir_size, user_key_size;
1149 u32 dev_indir_size = 0, dev_key_size = 0;
1150 struct ethtool_rxfh rxfh;
1151 u32 total_size;
1152 u32 indir_bytes;
1153 u32 *indir = NULL;
1154 u8 dev_hfunc = 0;
1155 u8 *hkey = NULL;
1156 u8 *rss_config;
1157
1158 if (!ops->get_rxfh)
1159 return -EOPNOTSUPP;
1160
1161 if (ops->get_rxfh_indir_size)
1162 dev_indir_size = ops->get_rxfh_indir_size(dev);
1163 if (ops->get_rxfh_key_size)
1164 dev_key_size = ops->get_rxfh_key_size(dev);
1165
1166 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1167 return -EFAULT;
1168 user_indir_size = rxfh.indir_size;
1169 user_key_size = rxfh.key_size;
1170
1171 /* Check that reserved fields are 0 for now */
1172 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1173 return -EINVAL;
1174 /* Most drivers don't handle rss_context, check it's 0 as well */
1175 if (rxfh.rss_context && !ops->get_rxfh_context)
1176 return -EOPNOTSUPP;
1177
1178 rxfh.indir_size = dev_indir_size;
1179 rxfh.key_size = dev_key_size;
1180 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1181 return -EFAULT;
1182
1183 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1184 (user_key_size && (user_key_size != dev_key_size)))
1185 return -EINVAL;
1186
1187 indir_bytes = user_indir_size * sizeof(indir[0]);
1188 total_size = indir_bytes + user_key_size;
1189 rss_config = kzalloc(total_size, GFP_USER);
1190 if (!rss_config)
1191 return -ENOMEM;
1192
1193 if (user_indir_size)
1194 indir = (u32 *)rss_config;
1195
1196 if (user_key_size)
1197 hkey = rss_config + indir_bytes;
1198
1199 if (rxfh.rss_context)
1200 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1201 &dev_hfunc,
1202 rxfh.rss_context);
1203 else
1204 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1205 if (ret)
1206 goto out;
1207
1208 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1209 &dev_hfunc, sizeof(rxfh.hfunc))) {
1210 ret = -EFAULT;
1211 } else if (copy_to_user(useraddr +
1212 offsetof(struct ethtool_rxfh, rss_config[0]),
1213 rss_config, total_size)) {
1214 ret = -EFAULT;
1215 }
1216 out:
1217 kfree(rss_config);
1218
1219 return ret;
1220 }
1221
ethtool_set_rxfh(struct net_device * dev,void __user * useraddr)1222 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1223 void __user *useraddr)
1224 {
1225 int ret;
1226 const struct ethtool_ops *ops = dev->ethtool_ops;
1227 struct ethtool_rxnfc rx_rings;
1228 struct ethtool_rxfh rxfh;
1229 u32 dev_indir_size = 0, dev_key_size = 0, i;
1230 u32 *indir = NULL, indir_bytes = 0;
1231 u8 *hkey = NULL;
1232 u8 *rss_config;
1233 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1234 bool delete = false;
1235
1236 if (!ops->get_rxnfc || !ops->set_rxfh)
1237 return -EOPNOTSUPP;
1238
1239 if (ops->get_rxfh_indir_size)
1240 dev_indir_size = ops->get_rxfh_indir_size(dev);
1241 if (ops->get_rxfh_key_size)
1242 dev_key_size = ops->get_rxfh_key_size(dev);
1243
1244 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1245 return -EFAULT;
1246
1247 /* Check that reserved fields are 0 for now */
1248 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1249 return -EINVAL;
1250 /* Most drivers don't handle rss_context, check it's 0 as well */
1251 if (rxfh.rss_context && !ops->set_rxfh_context)
1252 return -EOPNOTSUPP;
1253
1254 /* If either indir, hash key or function is valid, proceed further.
1255 * Must request at least one change: indir size, hash key or function.
1256 */
1257 if ((rxfh.indir_size &&
1258 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1259 rxfh.indir_size != dev_indir_size) ||
1260 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1261 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1262 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1263 return -EINVAL;
1264
1265 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1266 indir_bytes = dev_indir_size * sizeof(indir[0]);
1267
1268 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1269 if (!rss_config)
1270 return -ENOMEM;
1271
1272 rx_rings.cmd = ETHTOOL_GRXRINGS;
1273 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1274 if (ret)
1275 goto out;
1276
1277 /* rxfh.indir_size == 0 means reset the indir table to default (master
1278 * context) or delete the context (other RSS contexts).
1279 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1280 */
1281 if (rxfh.indir_size &&
1282 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1283 indir = (u32 *)rss_config;
1284 ret = ethtool_copy_validate_indir(indir,
1285 useraddr + rss_cfg_offset,
1286 &rx_rings,
1287 rxfh.indir_size);
1288 if (ret)
1289 goto out;
1290 } else if (rxfh.indir_size == 0) {
1291 if (rxfh.rss_context == 0) {
1292 indir = (u32 *)rss_config;
1293 for (i = 0; i < dev_indir_size; i++)
1294 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1295 } else {
1296 delete = true;
1297 }
1298 }
1299
1300 if (rxfh.key_size) {
1301 hkey = rss_config + indir_bytes;
1302 if (copy_from_user(hkey,
1303 useraddr + rss_cfg_offset + indir_bytes,
1304 rxfh.key_size)) {
1305 ret = -EFAULT;
1306 goto out;
1307 }
1308 }
1309
1310 if (rxfh.rss_context)
1311 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1312 &rxfh.rss_context, delete);
1313 else
1314 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1315 if (ret)
1316 goto out;
1317
1318 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1319 &rxfh.rss_context, sizeof(rxfh.rss_context)))
1320 ret = -EFAULT;
1321
1322 if (!rxfh.rss_context) {
1323 /* indicate whether rxfh was set to default */
1324 if (rxfh.indir_size == 0)
1325 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1326 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1327 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1328 }
1329
1330 out:
1331 kfree(rss_config);
1332 return ret;
1333 }
1334
ethtool_get_regs(struct net_device * dev,char __user * useraddr)1335 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1336 {
1337 struct ethtool_regs regs;
1338 const struct ethtool_ops *ops = dev->ethtool_ops;
1339 void *regbuf;
1340 int reglen, ret;
1341
1342 if (!ops->get_regs || !ops->get_regs_len)
1343 return -EOPNOTSUPP;
1344
1345 if (copy_from_user(®s, useraddr, sizeof(regs)))
1346 return -EFAULT;
1347
1348 reglen = ops->get_regs_len(dev);
1349 if (reglen <= 0)
1350 return reglen;
1351
1352 if (regs.len > reglen)
1353 regs.len = reglen;
1354
1355 regbuf = vzalloc(reglen);
1356 if (!regbuf)
1357 return -ENOMEM;
1358
1359 if (regs.len < reglen)
1360 reglen = regs.len;
1361
1362 ops->get_regs(dev, ®s, regbuf);
1363
1364 ret = -EFAULT;
1365 if (copy_to_user(useraddr, ®s, sizeof(regs)))
1366 goto out;
1367 useraddr += offsetof(struct ethtool_regs, data);
1368 if (copy_to_user(useraddr, regbuf, reglen))
1369 goto out;
1370 ret = 0;
1371
1372 out:
1373 vfree(regbuf);
1374 return ret;
1375 }
1376
ethtool_reset(struct net_device * dev,char __user * useraddr)1377 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1378 {
1379 struct ethtool_value reset;
1380 int ret;
1381
1382 if (!dev->ethtool_ops->reset)
1383 return -EOPNOTSUPP;
1384
1385 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1386 return -EFAULT;
1387
1388 ret = dev->ethtool_ops->reset(dev, &reset.data);
1389 if (ret)
1390 return ret;
1391
1392 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1393 return -EFAULT;
1394 return 0;
1395 }
1396
ethtool_get_wol(struct net_device * dev,char __user * useraddr)1397 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1398 {
1399 struct ethtool_wolinfo wol;
1400
1401 if (!dev->ethtool_ops->get_wol)
1402 return -EOPNOTSUPP;
1403
1404 memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1405 wol.cmd = ETHTOOL_GWOL;
1406 dev->ethtool_ops->get_wol(dev, &wol);
1407
1408 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1409 return -EFAULT;
1410 return 0;
1411 }
1412
ethtool_set_wol(struct net_device * dev,char __user * useraddr)1413 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1414 {
1415 struct ethtool_wolinfo wol;
1416 int ret;
1417
1418 if (!dev->ethtool_ops->set_wol)
1419 return -EOPNOTSUPP;
1420
1421 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1422 return -EFAULT;
1423
1424 ret = dev->ethtool_ops->set_wol(dev, &wol);
1425 if (ret)
1426 return ret;
1427
1428 dev->wol_enabled = !!wol.wolopts;
1429
1430 return 0;
1431 }
1432
ethtool_get_eee(struct net_device * dev,char __user * useraddr)1433 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1434 {
1435 struct ethtool_eee edata;
1436 int rc;
1437
1438 if (!dev->ethtool_ops->get_eee)
1439 return -EOPNOTSUPP;
1440
1441 memset(&edata, 0, sizeof(struct ethtool_eee));
1442 edata.cmd = ETHTOOL_GEEE;
1443 rc = dev->ethtool_ops->get_eee(dev, &edata);
1444
1445 if (rc)
1446 return rc;
1447
1448 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1449 return -EFAULT;
1450
1451 return 0;
1452 }
1453
ethtool_set_eee(struct net_device * dev,char __user * useraddr)1454 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1455 {
1456 struct ethtool_eee edata;
1457
1458 if (!dev->ethtool_ops->set_eee)
1459 return -EOPNOTSUPP;
1460
1461 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1462 return -EFAULT;
1463
1464 return dev->ethtool_ops->set_eee(dev, &edata);
1465 }
1466
ethtool_nway_reset(struct net_device * dev)1467 static int ethtool_nway_reset(struct net_device *dev)
1468 {
1469 if (!dev->ethtool_ops->nway_reset)
1470 return -EOPNOTSUPP;
1471
1472 return dev->ethtool_ops->nway_reset(dev);
1473 }
1474
ethtool_get_link(struct net_device * dev,char __user * useraddr)1475 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1476 {
1477 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1478
1479 if (!dev->ethtool_ops->get_link)
1480 return -EOPNOTSUPP;
1481
1482 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1483
1484 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1485 return -EFAULT;
1486 return 0;
1487 }
1488
ethtool_get_any_eeprom(struct net_device * dev,void __user * useraddr,int (* getter)(struct net_device *,struct ethtool_eeprom *,u8 *),u32 total_len)1489 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1490 int (*getter)(struct net_device *,
1491 struct ethtool_eeprom *, u8 *),
1492 u32 total_len)
1493 {
1494 struct ethtool_eeprom eeprom;
1495 void __user *userbuf = useraddr + sizeof(eeprom);
1496 u32 bytes_remaining;
1497 u8 *data;
1498 int ret = 0;
1499
1500 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1501 return -EFAULT;
1502
1503 /* Check for wrap and zero */
1504 if (eeprom.offset + eeprom.len <= eeprom.offset)
1505 return -EINVAL;
1506
1507 /* Check for exceeding total eeprom len */
1508 if (eeprom.offset + eeprom.len > total_len)
1509 return -EINVAL;
1510
1511 data = kmalloc(PAGE_SIZE, GFP_USER);
1512 if (!data)
1513 return -ENOMEM;
1514
1515 bytes_remaining = eeprom.len;
1516 while (bytes_remaining > 0) {
1517 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1518
1519 ret = getter(dev, &eeprom, data);
1520 if (ret)
1521 break;
1522 if (copy_to_user(userbuf, data, eeprom.len)) {
1523 ret = -EFAULT;
1524 break;
1525 }
1526 userbuf += eeprom.len;
1527 eeprom.offset += eeprom.len;
1528 bytes_remaining -= eeprom.len;
1529 }
1530
1531 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1532 eeprom.offset -= eeprom.len;
1533 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1534 ret = -EFAULT;
1535
1536 kfree(data);
1537 return ret;
1538 }
1539
ethtool_get_eeprom(struct net_device * dev,void __user * useraddr)1540 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1541 {
1542 const struct ethtool_ops *ops = dev->ethtool_ops;
1543
1544 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1545 !ops->get_eeprom_len(dev))
1546 return -EOPNOTSUPP;
1547
1548 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1549 ops->get_eeprom_len(dev));
1550 }
1551
ethtool_set_eeprom(struct net_device * dev,void __user * useraddr)1552 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1553 {
1554 struct ethtool_eeprom eeprom;
1555 const struct ethtool_ops *ops = dev->ethtool_ops;
1556 void __user *userbuf = useraddr + sizeof(eeprom);
1557 u32 bytes_remaining;
1558 u8 *data;
1559 int ret = 0;
1560
1561 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1562 !ops->get_eeprom_len(dev))
1563 return -EOPNOTSUPP;
1564
1565 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1566 return -EFAULT;
1567
1568 /* Check for wrap and zero */
1569 if (eeprom.offset + eeprom.len <= eeprom.offset)
1570 return -EINVAL;
1571
1572 /* Check for exceeding total eeprom len */
1573 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1574 return -EINVAL;
1575
1576 data = kmalloc(PAGE_SIZE, GFP_USER);
1577 if (!data)
1578 return -ENOMEM;
1579
1580 bytes_remaining = eeprom.len;
1581 while (bytes_remaining > 0) {
1582 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1583
1584 if (copy_from_user(data, userbuf, eeprom.len)) {
1585 ret = -EFAULT;
1586 break;
1587 }
1588 ret = ops->set_eeprom(dev, &eeprom, data);
1589 if (ret)
1590 break;
1591 userbuf += eeprom.len;
1592 eeprom.offset += eeprom.len;
1593 bytes_remaining -= eeprom.len;
1594 }
1595
1596 kfree(data);
1597 return ret;
1598 }
1599
ethtool_get_coalesce(struct net_device * dev,void __user * useraddr)1600 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1601 void __user *useraddr)
1602 {
1603 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1604
1605 if (!dev->ethtool_ops->get_coalesce)
1606 return -EOPNOTSUPP;
1607
1608 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1609
1610 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1611 return -EFAULT;
1612 return 0;
1613 }
1614
ethtool_set_coalesce(struct net_device * dev,void __user * useraddr)1615 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1616 void __user *useraddr)
1617 {
1618 struct ethtool_coalesce coalesce;
1619
1620 if (!dev->ethtool_ops->set_coalesce)
1621 return -EOPNOTSUPP;
1622
1623 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1624 return -EFAULT;
1625
1626 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1627 }
1628
ethtool_get_ringparam(struct net_device * dev,void __user * useraddr)1629 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1630 {
1631 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1632
1633 if (!dev->ethtool_ops->get_ringparam)
1634 return -EOPNOTSUPP;
1635
1636 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1637
1638 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1639 return -EFAULT;
1640 return 0;
1641 }
1642
ethtool_set_ringparam(struct net_device * dev,void __user * useraddr)1643 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1644 {
1645 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1646
1647 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1648 return -EOPNOTSUPP;
1649
1650 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1651 return -EFAULT;
1652
1653 dev->ethtool_ops->get_ringparam(dev, &max);
1654
1655 /* ensure new ring parameters are within the maximums */
1656 if (ringparam.rx_pending > max.rx_max_pending ||
1657 ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1658 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1659 ringparam.tx_pending > max.tx_max_pending)
1660 return -EINVAL;
1661
1662 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1663 }
1664
ethtool_get_channels(struct net_device * dev,void __user * useraddr)1665 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1666 void __user *useraddr)
1667 {
1668 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1669
1670 if (!dev->ethtool_ops->get_channels)
1671 return -EOPNOTSUPP;
1672
1673 dev->ethtool_ops->get_channels(dev, &channels);
1674
1675 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1676 return -EFAULT;
1677 return 0;
1678 }
1679
ethtool_set_channels(struct net_device * dev,void __user * useraddr)1680 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1681 void __user *useraddr)
1682 {
1683 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1684 u16 from_channel, to_channel;
1685 u32 max_rx_in_use = 0;
1686 unsigned int i;
1687
1688 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1689 return -EOPNOTSUPP;
1690
1691 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1692 return -EFAULT;
1693
1694 dev->ethtool_ops->get_channels(dev, &curr);
1695
1696 /* ensure new counts are within the maximums */
1697 if (channels.rx_count > curr.max_rx ||
1698 channels.tx_count > curr.max_tx ||
1699 channels.combined_count > curr.max_combined ||
1700 channels.other_count > curr.max_other)
1701 return -EINVAL;
1702
1703 /* ensure the new Rx count fits within the configured Rx flow
1704 * indirection table settings */
1705 if (netif_is_rxfh_configured(dev) &&
1706 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1707 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1708 return -EINVAL;
1709
1710 /* Disabling channels, query zero-copy AF_XDP sockets */
1711 from_channel = channels.combined_count +
1712 min(channels.rx_count, channels.tx_count);
1713 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1714 for (i = from_channel; i < to_channel; i++)
1715 if (xdp_get_umem_from_qid(dev, i))
1716 return -EINVAL;
1717
1718 return dev->ethtool_ops->set_channels(dev, &channels);
1719 }
1720
ethtool_get_pauseparam(struct net_device * dev,void __user * useraddr)1721 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1722 {
1723 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1724
1725 if (!dev->ethtool_ops->get_pauseparam)
1726 return -EOPNOTSUPP;
1727
1728 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1729
1730 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1731 return -EFAULT;
1732 return 0;
1733 }
1734
ethtool_set_pauseparam(struct net_device * dev,void __user * useraddr)1735 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1736 {
1737 struct ethtool_pauseparam pauseparam;
1738
1739 if (!dev->ethtool_ops->set_pauseparam)
1740 return -EOPNOTSUPP;
1741
1742 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1743 return -EFAULT;
1744
1745 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1746 }
1747
ethtool_self_test(struct net_device * dev,char __user * useraddr)1748 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1749 {
1750 struct ethtool_test test;
1751 const struct ethtool_ops *ops = dev->ethtool_ops;
1752 u64 *data;
1753 int ret, test_len;
1754
1755 if (!ops->self_test || !ops->get_sset_count)
1756 return -EOPNOTSUPP;
1757
1758 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1759 if (test_len < 0)
1760 return test_len;
1761 WARN_ON(test_len == 0);
1762
1763 if (copy_from_user(&test, useraddr, sizeof(test)))
1764 return -EFAULT;
1765
1766 test.len = test_len;
1767 data = kmalloc_array(test_len, sizeof(u64), GFP_USER);
1768 if (!data)
1769 return -ENOMEM;
1770
1771 ops->self_test(dev, &test, data);
1772
1773 ret = -EFAULT;
1774 if (copy_to_user(useraddr, &test, sizeof(test)))
1775 goto out;
1776 useraddr += sizeof(test);
1777 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1778 goto out;
1779 ret = 0;
1780
1781 out:
1782 kfree(data);
1783 return ret;
1784 }
1785
ethtool_get_strings(struct net_device * dev,void __user * useraddr)1786 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1787 {
1788 struct ethtool_gstrings gstrings;
1789 u8 *data;
1790 int ret;
1791
1792 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1793 return -EFAULT;
1794
1795 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1796 if (ret < 0)
1797 return ret;
1798 if (ret > S32_MAX / ETH_GSTRING_LEN)
1799 return -ENOMEM;
1800 WARN_ON_ONCE(!ret);
1801
1802 gstrings.len = ret;
1803
1804 if (gstrings.len) {
1805 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1806 if (!data)
1807 return -ENOMEM;
1808
1809 __ethtool_get_strings(dev, gstrings.string_set, data);
1810 } else {
1811 data = NULL;
1812 }
1813
1814 ret = -EFAULT;
1815 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1816 goto out;
1817 useraddr += sizeof(gstrings);
1818 if (gstrings.len &&
1819 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1820 goto out;
1821 ret = 0;
1822
1823 out:
1824 vfree(data);
1825 return ret;
1826 }
1827
ethtool_phys_id(struct net_device * dev,void __user * useraddr)1828 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1829 {
1830 struct ethtool_value id;
1831 static bool busy;
1832 const struct ethtool_ops *ops = dev->ethtool_ops;
1833 int rc;
1834
1835 if (!ops->set_phys_id)
1836 return -EOPNOTSUPP;
1837
1838 if (busy)
1839 return -EBUSY;
1840
1841 if (copy_from_user(&id, useraddr, sizeof(id)))
1842 return -EFAULT;
1843
1844 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1845 if (rc < 0)
1846 return rc;
1847
1848 /* Drop the RTNL lock while waiting, but prevent reentry or
1849 * removal of the device.
1850 */
1851 busy = true;
1852 dev_hold(dev);
1853 rtnl_unlock();
1854
1855 if (rc == 0) {
1856 /* Driver will handle this itself */
1857 schedule_timeout_interruptible(
1858 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1859 } else {
1860 /* Driver expects to be called at twice the frequency in rc */
1861 int n = rc * 2, i, interval = HZ / n;
1862
1863 /* Count down seconds */
1864 do {
1865 /* Count down iterations per second */
1866 i = n;
1867 do {
1868 rtnl_lock();
1869 rc = ops->set_phys_id(dev,
1870 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1871 rtnl_unlock();
1872 if (rc)
1873 break;
1874 schedule_timeout_interruptible(interval);
1875 } while (!signal_pending(current) && --i != 0);
1876 } while (!signal_pending(current) &&
1877 (id.data == 0 || --id.data != 0));
1878 }
1879
1880 rtnl_lock();
1881 dev_put(dev);
1882 busy = false;
1883
1884 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1885 return rc;
1886 }
1887
ethtool_get_stats(struct net_device * dev,void __user * useraddr)1888 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1889 {
1890 struct ethtool_stats stats;
1891 const struct ethtool_ops *ops = dev->ethtool_ops;
1892 u64 *data;
1893 int ret, n_stats;
1894
1895 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1896 return -EOPNOTSUPP;
1897
1898 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1899 if (n_stats < 0)
1900 return n_stats;
1901 if (n_stats > S32_MAX / sizeof(u64))
1902 return -ENOMEM;
1903 WARN_ON_ONCE(!n_stats);
1904 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1905 return -EFAULT;
1906
1907 stats.n_stats = n_stats;
1908
1909 if (n_stats) {
1910 data = vzalloc(array_size(n_stats, sizeof(u64)));
1911 if (!data)
1912 return -ENOMEM;
1913 ops->get_ethtool_stats(dev, &stats, data);
1914 } else {
1915 data = NULL;
1916 }
1917
1918 ret = -EFAULT;
1919 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1920 goto out;
1921 useraddr += sizeof(stats);
1922 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1923 goto out;
1924 ret = 0;
1925
1926 out:
1927 vfree(data);
1928 return ret;
1929 }
1930
ethtool_get_phy_stats(struct net_device * dev,void __user * useraddr)1931 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1932 {
1933 const struct ethtool_ops *ops = dev->ethtool_ops;
1934 struct phy_device *phydev = dev->phydev;
1935 struct ethtool_stats stats;
1936 u64 *data;
1937 int ret, n_stats;
1938
1939 if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
1940 return -EOPNOTSUPP;
1941
1942 if (dev->phydev && !ops->get_ethtool_phy_stats)
1943 n_stats = phy_ethtool_get_sset_count(dev->phydev);
1944 else
1945 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
1946 if (n_stats < 0)
1947 return n_stats;
1948 if (n_stats > S32_MAX / sizeof(u64))
1949 return -ENOMEM;
1950 WARN_ON_ONCE(!n_stats);
1951
1952 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1953 return -EFAULT;
1954
1955 stats.n_stats = n_stats;
1956
1957 if (n_stats) {
1958 data = vzalloc(array_size(n_stats, sizeof(u64)));
1959 if (!data)
1960 return -ENOMEM;
1961
1962 if (dev->phydev && !ops->get_ethtool_phy_stats) {
1963 ret = phy_ethtool_get_stats(dev->phydev, &stats, data);
1964 if (ret < 0)
1965 goto out;
1966 } else {
1967 ops->get_ethtool_phy_stats(dev, &stats, data);
1968 }
1969 } else {
1970 data = NULL;
1971 }
1972
1973 ret = -EFAULT;
1974 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1975 goto out;
1976 useraddr += sizeof(stats);
1977 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1978 goto out;
1979 ret = 0;
1980
1981 out:
1982 vfree(data);
1983 return ret;
1984 }
1985
ethtool_get_perm_addr(struct net_device * dev,void __user * useraddr)1986 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1987 {
1988 struct ethtool_perm_addr epaddr;
1989
1990 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1991 return -EFAULT;
1992
1993 if (epaddr.size < dev->addr_len)
1994 return -ETOOSMALL;
1995 epaddr.size = dev->addr_len;
1996
1997 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1998 return -EFAULT;
1999 useraddr += sizeof(epaddr);
2000 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2001 return -EFAULT;
2002 return 0;
2003 }
2004
ethtool_get_value(struct net_device * dev,char __user * useraddr,u32 cmd,u32 (* actor)(struct net_device *))2005 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2006 u32 cmd, u32 (*actor)(struct net_device *))
2007 {
2008 struct ethtool_value edata = { .cmd = cmd };
2009
2010 if (!actor)
2011 return -EOPNOTSUPP;
2012
2013 edata.data = actor(dev);
2014
2015 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2016 return -EFAULT;
2017 return 0;
2018 }
2019
ethtool_set_value_void(struct net_device * dev,char __user * useraddr,void (* actor)(struct net_device *,u32))2020 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2021 void (*actor)(struct net_device *, u32))
2022 {
2023 struct ethtool_value edata;
2024
2025 if (!actor)
2026 return -EOPNOTSUPP;
2027
2028 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2029 return -EFAULT;
2030
2031 actor(dev, edata.data);
2032 return 0;
2033 }
2034
ethtool_set_value(struct net_device * dev,char __user * useraddr,int (* actor)(struct net_device *,u32))2035 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2036 int (*actor)(struct net_device *, u32))
2037 {
2038 struct ethtool_value edata;
2039
2040 if (!actor)
2041 return -EOPNOTSUPP;
2042
2043 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2044 return -EFAULT;
2045
2046 return actor(dev, edata.data);
2047 }
2048
ethtool_flash_device(struct net_device * dev,char __user * useraddr)2049 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2050 char __user *useraddr)
2051 {
2052 struct ethtool_flash efl;
2053
2054 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2055 return -EFAULT;
2056 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2057
2058 if (!dev->ethtool_ops->flash_device)
2059 return devlink_compat_flash_update(dev, efl.data);
2060
2061 return dev->ethtool_ops->flash_device(dev, &efl);
2062 }
2063
ethtool_set_dump(struct net_device * dev,void __user * useraddr)2064 static int ethtool_set_dump(struct net_device *dev,
2065 void __user *useraddr)
2066 {
2067 struct ethtool_dump dump;
2068
2069 if (!dev->ethtool_ops->set_dump)
2070 return -EOPNOTSUPP;
2071
2072 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2073 return -EFAULT;
2074
2075 return dev->ethtool_ops->set_dump(dev, &dump);
2076 }
2077
ethtool_get_dump_flag(struct net_device * dev,void __user * useraddr)2078 static int ethtool_get_dump_flag(struct net_device *dev,
2079 void __user *useraddr)
2080 {
2081 int ret;
2082 struct ethtool_dump dump;
2083 const struct ethtool_ops *ops = dev->ethtool_ops;
2084
2085 if (!ops->get_dump_flag)
2086 return -EOPNOTSUPP;
2087
2088 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2089 return -EFAULT;
2090
2091 ret = ops->get_dump_flag(dev, &dump);
2092 if (ret)
2093 return ret;
2094
2095 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2096 return -EFAULT;
2097 return 0;
2098 }
2099
ethtool_get_dump_data(struct net_device * dev,void __user * useraddr)2100 static int ethtool_get_dump_data(struct net_device *dev,
2101 void __user *useraddr)
2102 {
2103 int ret;
2104 __u32 len;
2105 struct ethtool_dump dump, tmp;
2106 const struct ethtool_ops *ops = dev->ethtool_ops;
2107 void *data = NULL;
2108
2109 if (!ops->get_dump_data || !ops->get_dump_flag)
2110 return -EOPNOTSUPP;
2111
2112 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2113 return -EFAULT;
2114
2115 memset(&tmp, 0, sizeof(tmp));
2116 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2117 ret = ops->get_dump_flag(dev, &tmp);
2118 if (ret)
2119 return ret;
2120
2121 len = min(tmp.len, dump.len);
2122 if (!len)
2123 return -EFAULT;
2124
2125 /* Don't ever let the driver think there's more space available
2126 * than it requested with .get_dump_flag().
2127 */
2128 dump.len = len;
2129
2130 /* Always allocate enough space to hold the whole thing so that the
2131 * driver does not need to check the length and bother with partial
2132 * dumping.
2133 */
2134 data = vzalloc(tmp.len);
2135 if (!data)
2136 return -ENOMEM;
2137 ret = ops->get_dump_data(dev, &dump, data);
2138 if (ret)
2139 goto out;
2140
2141 /* There are two sane possibilities:
2142 * 1. The driver's .get_dump_data() does not touch dump.len.
2143 * 2. Or it may set dump.len to how much it really writes, which
2144 * should be tmp.len (or len if it can do a partial dump).
2145 * In any case respond to userspace with the actual length of data
2146 * it's receiving.
2147 */
2148 WARN_ON(dump.len != len && dump.len != tmp.len);
2149 dump.len = len;
2150
2151 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2152 ret = -EFAULT;
2153 goto out;
2154 }
2155 useraddr += offsetof(struct ethtool_dump, data);
2156 if (copy_to_user(useraddr, data, len))
2157 ret = -EFAULT;
2158 out:
2159 vfree(data);
2160 return ret;
2161 }
2162
ethtool_get_ts_info(struct net_device * dev,void __user * useraddr)2163 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2164 {
2165 int err = 0;
2166 struct ethtool_ts_info info;
2167 const struct ethtool_ops *ops = dev->ethtool_ops;
2168 struct phy_device *phydev = dev->phydev;
2169
2170 memset(&info, 0, sizeof(info));
2171 info.cmd = ETHTOOL_GET_TS_INFO;
2172
2173 if (phydev && phydev->drv && phydev->drv->ts_info) {
2174 err = phydev->drv->ts_info(phydev, &info);
2175 } else if (ops->get_ts_info) {
2176 err = ops->get_ts_info(dev, &info);
2177 } else {
2178 info.so_timestamping =
2179 SOF_TIMESTAMPING_RX_SOFTWARE |
2180 SOF_TIMESTAMPING_SOFTWARE;
2181 info.phc_index = -1;
2182 }
2183
2184 if (err)
2185 return err;
2186
2187 if (copy_to_user(useraddr, &info, sizeof(info)))
2188 err = -EFAULT;
2189
2190 return err;
2191 }
2192
__ethtool_get_module_info(struct net_device * dev,struct ethtool_modinfo * modinfo)2193 static int __ethtool_get_module_info(struct net_device *dev,
2194 struct ethtool_modinfo *modinfo)
2195 {
2196 const struct ethtool_ops *ops = dev->ethtool_ops;
2197 struct phy_device *phydev = dev->phydev;
2198
2199 if (dev->sfp_bus)
2200 return sfp_get_module_info(dev->sfp_bus, modinfo);
2201
2202 if (phydev && phydev->drv && phydev->drv->module_info)
2203 return phydev->drv->module_info(phydev, modinfo);
2204
2205 if (ops->get_module_info)
2206 return ops->get_module_info(dev, modinfo);
2207
2208 return -EOPNOTSUPP;
2209 }
2210
ethtool_get_module_info(struct net_device * dev,void __user * useraddr)2211 static int ethtool_get_module_info(struct net_device *dev,
2212 void __user *useraddr)
2213 {
2214 int ret;
2215 struct ethtool_modinfo modinfo;
2216
2217 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2218 return -EFAULT;
2219
2220 ret = __ethtool_get_module_info(dev, &modinfo);
2221 if (ret)
2222 return ret;
2223
2224 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2225 return -EFAULT;
2226
2227 return 0;
2228 }
2229
__ethtool_get_module_eeprom(struct net_device * dev,struct ethtool_eeprom * ee,u8 * data)2230 static int __ethtool_get_module_eeprom(struct net_device *dev,
2231 struct ethtool_eeprom *ee, u8 *data)
2232 {
2233 const struct ethtool_ops *ops = dev->ethtool_ops;
2234 struct phy_device *phydev = dev->phydev;
2235
2236 if (dev->sfp_bus)
2237 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2238
2239 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2240 return phydev->drv->module_eeprom(phydev, ee, data);
2241
2242 if (ops->get_module_eeprom)
2243 return ops->get_module_eeprom(dev, ee, data);
2244
2245 return -EOPNOTSUPP;
2246 }
2247
ethtool_get_module_eeprom(struct net_device * dev,void __user * useraddr)2248 static int ethtool_get_module_eeprom(struct net_device *dev,
2249 void __user *useraddr)
2250 {
2251 int ret;
2252 struct ethtool_modinfo modinfo;
2253
2254 ret = __ethtool_get_module_info(dev, &modinfo);
2255 if (ret)
2256 return ret;
2257
2258 return ethtool_get_any_eeprom(dev, useraddr,
2259 __ethtool_get_module_eeprom,
2260 modinfo.eeprom_len);
2261 }
2262
ethtool_tunable_valid(const struct ethtool_tunable * tuna)2263 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2264 {
2265 switch (tuna->id) {
2266 case ETHTOOL_RX_COPYBREAK:
2267 case ETHTOOL_TX_COPYBREAK:
2268 if (tuna->len != sizeof(u32) ||
2269 tuna->type_id != ETHTOOL_TUNABLE_U32)
2270 return -EINVAL;
2271 break;
2272 case ETHTOOL_PFC_PREVENTION_TOUT:
2273 if (tuna->len != sizeof(u16) ||
2274 tuna->type_id != ETHTOOL_TUNABLE_U16)
2275 return -EINVAL;
2276 break;
2277 default:
2278 return -EINVAL;
2279 }
2280
2281 return 0;
2282 }
2283
ethtool_get_tunable(struct net_device * dev,void __user * useraddr)2284 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2285 {
2286 int ret;
2287 struct ethtool_tunable tuna;
2288 const struct ethtool_ops *ops = dev->ethtool_ops;
2289 void *data;
2290
2291 if (!ops->get_tunable)
2292 return -EOPNOTSUPP;
2293 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2294 return -EFAULT;
2295 ret = ethtool_tunable_valid(&tuna);
2296 if (ret)
2297 return ret;
2298 data = kmalloc(tuna.len, GFP_USER);
2299 if (!data)
2300 return -ENOMEM;
2301 ret = ops->get_tunable(dev, &tuna, data);
2302 if (ret)
2303 goto out;
2304 useraddr += sizeof(tuna);
2305 ret = -EFAULT;
2306 if (copy_to_user(useraddr, data, tuna.len))
2307 goto out;
2308 ret = 0;
2309
2310 out:
2311 kfree(data);
2312 return ret;
2313 }
2314
ethtool_set_tunable(struct net_device * dev,void __user * useraddr)2315 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2316 {
2317 int ret;
2318 struct ethtool_tunable tuna;
2319 const struct ethtool_ops *ops = dev->ethtool_ops;
2320 void *data;
2321
2322 if (!ops->set_tunable)
2323 return -EOPNOTSUPP;
2324 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2325 return -EFAULT;
2326 ret = ethtool_tunable_valid(&tuna);
2327 if (ret)
2328 return ret;
2329 useraddr += sizeof(tuna);
2330 data = memdup_user(useraddr, tuna.len);
2331 if (IS_ERR(data))
2332 return PTR_ERR(data);
2333 ret = ops->set_tunable(dev, &tuna, data);
2334
2335 kfree(data);
2336 return ret;
2337 }
2338
2339 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)2340 ethtool_get_per_queue_coalesce(struct net_device *dev,
2341 void __user *useraddr,
2342 struct ethtool_per_queue_op *per_queue_opt)
2343 {
2344 u32 bit;
2345 int ret;
2346 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2347
2348 if (!dev->ethtool_ops->get_per_queue_coalesce)
2349 return -EOPNOTSUPP;
2350
2351 useraddr += sizeof(*per_queue_opt);
2352
2353 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2354 MAX_NUM_QUEUE);
2355
2356 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2357 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2358
2359 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2360 if (ret != 0)
2361 return ret;
2362 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2363 return -EFAULT;
2364 useraddr += sizeof(coalesce);
2365 }
2366
2367 return 0;
2368 }
2369
2370 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)2371 ethtool_set_per_queue_coalesce(struct net_device *dev,
2372 void __user *useraddr,
2373 struct ethtool_per_queue_op *per_queue_opt)
2374 {
2375 u32 bit;
2376 int i, ret = 0;
2377 int n_queue;
2378 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2379 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2380
2381 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2382 (!dev->ethtool_ops->get_per_queue_coalesce))
2383 return -EOPNOTSUPP;
2384
2385 useraddr += sizeof(*per_queue_opt);
2386
2387 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2388 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2389 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2390 if (!backup)
2391 return -ENOMEM;
2392
2393 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2394 struct ethtool_coalesce coalesce;
2395
2396 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2397 if (ret != 0)
2398 goto roll_back;
2399
2400 tmp++;
2401
2402 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2403 ret = -EFAULT;
2404 goto roll_back;
2405 }
2406
2407 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2408 if (ret != 0)
2409 goto roll_back;
2410
2411 useraddr += sizeof(coalesce);
2412 }
2413
2414 roll_back:
2415 if (ret != 0) {
2416 tmp = backup;
2417 for_each_set_bit(i, queue_mask, bit) {
2418 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2419 tmp++;
2420 }
2421 }
2422 kfree(backup);
2423
2424 return ret;
2425 }
2426
ethtool_set_per_queue(struct net_device * dev,void __user * useraddr,u32 sub_cmd)2427 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2428 void __user *useraddr, u32 sub_cmd)
2429 {
2430 struct ethtool_per_queue_op per_queue_opt;
2431
2432 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2433 return -EFAULT;
2434
2435 if (per_queue_opt.sub_command != sub_cmd)
2436 return -EINVAL;
2437
2438 switch (per_queue_opt.sub_command) {
2439 case ETHTOOL_GCOALESCE:
2440 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2441 case ETHTOOL_SCOALESCE:
2442 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2443 default:
2444 return -EOPNOTSUPP;
2445 };
2446 }
2447
ethtool_phy_tunable_valid(const struct ethtool_tunable * tuna)2448 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2449 {
2450 switch (tuna->id) {
2451 case ETHTOOL_PHY_DOWNSHIFT:
2452 case ETHTOOL_PHY_FAST_LINK_DOWN:
2453 if (tuna->len != sizeof(u8) ||
2454 tuna->type_id != ETHTOOL_TUNABLE_U8)
2455 return -EINVAL;
2456 break;
2457 case ETHTOOL_PHY_EDPD:
2458 if (tuna->len != sizeof(u16) ||
2459 tuna->type_id != ETHTOOL_TUNABLE_U16)
2460 return -EINVAL;
2461 break;
2462 default:
2463 return -EINVAL;
2464 }
2465
2466 return 0;
2467 }
2468
get_phy_tunable(struct net_device * dev,void __user * useraddr)2469 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2470 {
2471 int ret;
2472 struct ethtool_tunable tuna;
2473 struct phy_device *phydev = dev->phydev;
2474 void *data;
2475
2476 if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2477 return -EOPNOTSUPP;
2478
2479 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2480 return -EFAULT;
2481 ret = ethtool_phy_tunable_valid(&tuna);
2482 if (ret)
2483 return ret;
2484 data = kmalloc(tuna.len, GFP_USER);
2485 if (!data)
2486 return -ENOMEM;
2487 mutex_lock(&phydev->lock);
2488 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2489 mutex_unlock(&phydev->lock);
2490 if (ret)
2491 goto out;
2492 useraddr += sizeof(tuna);
2493 ret = -EFAULT;
2494 if (copy_to_user(useraddr, data, tuna.len))
2495 goto out;
2496 ret = 0;
2497
2498 out:
2499 kfree(data);
2500 return ret;
2501 }
2502
set_phy_tunable(struct net_device * dev,void __user * useraddr)2503 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2504 {
2505 int ret;
2506 struct ethtool_tunable tuna;
2507 struct phy_device *phydev = dev->phydev;
2508 void *data;
2509
2510 if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2511 return -EOPNOTSUPP;
2512 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2513 return -EFAULT;
2514 ret = ethtool_phy_tunable_valid(&tuna);
2515 if (ret)
2516 return ret;
2517 useraddr += sizeof(tuna);
2518 data = memdup_user(useraddr, tuna.len);
2519 if (IS_ERR(data))
2520 return PTR_ERR(data);
2521 mutex_lock(&phydev->lock);
2522 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2523 mutex_unlock(&phydev->lock);
2524
2525 kfree(data);
2526 return ret;
2527 }
2528
ethtool_get_fecparam(struct net_device * dev,void __user * useraddr)2529 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2530 {
2531 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2532 int rc;
2533
2534 if (!dev->ethtool_ops->get_fecparam)
2535 return -EOPNOTSUPP;
2536
2537 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2538 if (rc)
2539 return rc;
2540
2541 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2542 return -EFAULT;
2543 return 0;
2544 }
2545
ethtool_set_fecparam(struct net_device * dev,void __user * useraddr)2546 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2547 {
2548 struct ethtool_fecparam fecparam;
2549
2550 if (!dev->ethtool_ops->set_fecparam)
2551 return -EOPNOTSUPP;
2552
2553 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2554 return -EFAULT;
2555
2556 return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2557 }
2558
2559 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
2560
dev_ethtool(struct net * net,struct ifreq * ifr)2561 int dev_ethtool(struct net *net, struct ifreq *ifr)
2562 {
2563 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2564 void __user *useraddr = ifr->ifr_data;
2565 u32 ethcmd, sub_cmd;
2566 int rc;
2567 netdev_features_t old_features;
2568
2569 if (!dev || !netif_device_present(dev))
2570 return -ENODEV;
2571
2572 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
2573 return -EFAULT;
2574
2575 if (ethcmd == ETHTOOL_PERQUEUE) {
2576 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2577 return -EFAULT;
2578 } else {
2579 sub_cmd = ethcmd;
2580 }
2581 /* Allow some commands to be done by anyone */
2582 switch (sub_cmd) {
2583 case ETHTOOL_GSET:
2584 case ETHTOOL_GDRVINFO:
2585 case ETHTOOL_GMSGLVL:
2586 case ETHTOOL_GLINK:
2587 case ETHTOOL_GCOALESCE:
2588 case ETHTOOL_GRINGPARAM:
2589 case ETHTOOL_GPAUSEPARAM:
2590 case ETHTOOL_GRXCSUM:
2591 case ETHTOOL_GTXCSUM:
2592 case ETHTOOL_GSG:
2593 case ETHTOOL_GSSET_INFO:
2594 case ETHTOOL_GSTRINGS:
2595 case ETHTOOL_GSTATS:
2596 case ETHTOOL_GPHYSTATS:
2597 case ETHTOOL_GTSO:
2598 case ETHTOOL_GPERMADDR:
2599 case ETHTOOL_GUFO:
2600 case ETHTOOL_GGSO:
2601 case ETHTOOL_GGRO:
2602 case ETHTOOL_GFLAGS:
2603 case ETHTOOL_GPFLAGS:
2604 case ETHTOOL_GRXFH:
2605 case ETHTOOL_GRXRINGS:
2606 case ETHTOOL_GRXCLSRLCNT:
2607 case ETHTOOL_GRXCLSRULE:
2608 case ETHTOOL_GRXCLSRLALL:
2609 case ETHTOOL_GRXFHINDIR:
2610 case ETHTOOL_GRSSH:
2611 case ETHTOOL_GFEATURES:
2612 case ETHTOOL_GCHANNELS:
2613 case ETHTOOL_GET_TS_INFO:
2614 case ETHTOOL_GEEE:
2615 case ETHTOOL_GTUNABLE:
2616 case ETHTOOL_PHY_GTUNABLE:
2617 case ETHTOOL_GLINKSETTINGS:
2618 case ETHTOOL_GFECPARAM:
2619 break;
2620 default:
2621 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2622 return -EPERM;
2623 }
2624
2625 if (dev->ethtool_ops->begin) {
2626 rc = dev->ethtool_ops->begin(dev);
2627 if (rc < 0)
2628 return rc;
2629 }
2630 old_features = dev->features;
2631
2632 switch (ethcmd) {
2633 case ETHTOOL_GSET:
2634 rc = ethtool_get_settings(dev, useraddr);
2635 break;
2636 case ETHTOOL_SSET:
2637 rc = ethtool_set_settings(dev, useraddr);
2638 break;
2639 case ETHTOOL_GDRVINFO:
2640 rc = ethtool_get_drvinfo(dev, useraddr);
2641 break;
2642 case ETHTOOL_GREGS:
2643 rc = ethtool_get_regs(dev, useraddr);
2644 break;
2645 case ETHTOOL_GWOL:
2646 rc = ethtool_get_wol(dev, useraddr);
2647 break;
2648 case ETHTOOL_SWOL:
2649 rc = ethtool_set_wol(dev, useraddr);
2650 break;
2651 case ETHTOOL_GMSGLVL:
2652 rc = ethtool_get_value(dev, useraddr, ethcmd,
2653 dev->ethtool_ops->get_msglevel);
2654 break;
2655 case ETHTOOL_SMSGLVL:
2656 rc = ethtool_set_value_void(dev, useraddr,
2657 dev->ethtool_ops->set_msglevel);
2658 break;
2659 case ETHTOOL_GEEE:
2660 rc = ethtool_get_eee(dev, useraddr);
2661 break;
2662 case ETHTOOL_SEEE:
2663 rc = ethtool_set_eee(dev, useraddr);
2664 break;
2665 case ETHTOOL_NWAY_RST:
2666 rc = ethtool_nway_reset(dev);
2667 break;
2668 case ETHTOOL_GLINK:
2669 rc = ethtool_get_link(dev, useraddr);
2670 break;
2671 case ETHTOOL_GEEPROM:
2672 rc = ethtool_get_eeprom(dev, useraddr);
2673 break;
2674 case ETHTOOL_SEEPROM:
2675 rc = ethtool_set_eeprom(dev, useraddr);
2676 break;
2677 case ETHTOOL_GCOALESCE:
2678 rc = ethtool_get_coalesce(dev, useraddr);
2679 break;
2680 case ETHTOOL_SCOALESCE:
2681 rc = ethtool_set_coalesce(dev, useraddr);
2682 break;
2683 case ETHTOOL_GRINGPARAM:
2684 rc = ethtool_get_ringparam(dev, useraddr);
2685 break;
2686 case ETHTOOL_SRINGPARAM:
2687 rc = ethtool_set_ringparam(dev, useraddr);
2688 break;
2689 case ETHTOOL_GPAUSEPARAM:
2690 rc = ethtool_get_pauseparam(dev, useraddr);
2691 break;
2692 case ETHTOOL_SPAUSEPARAM:
2693 rc = ethtool_set_pauseparam(dev, useraddr);
2694 break;
2695 case ETHTOOL_TEST:
2696 rc = ethtool_self_test(dev, useraddr);
2697 break;
2698 case ETHTOOL_GSTRINGS:
2699 rc = ethtool_get_strings(dev, useraddr);
2700 break;
2701 case ETHTOOL_PHYS_ID:
2702 rc = ethtool_phys_id(dev, useraddr);
2703 break;
2704 case ETHTOOL_GSTATS:
2705 rc = ethtool_get_stats(dev, useraddr);
2706 break;
2707 case ETHTOOL_GPERMADDR:
2708 rc = ethtool_get_perm_addr(dev, useraddr);
2709 break;
2710 case ETHTOOL_GFLAGS:
2711 rc = ethtool_get_value(dev, useraddr, ethcmd,
2712 __ethtool_get_flags);
2713 break;
2714 case ETHTOOL_SFLAGS:
2715 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2716 break;
2717 case ETHTOOL_GPFLAGS:
2718 rc = ethtool_get_value(dev, useraddr, ethcmd,
2719 dev->ethtool_ops->get_priv_flags);
2720 break;
2721 case ETHTOOL_SPFLAGS:
2722 rc = ethtool_set_value(dev, useraddr,
2723 dev->ethtool_ops->set_priv_flags);
2724 break;
2725 case ETHTOOL_GRXFH:
2726 case ETHTOOL_GRXRINGS:
2727 case ETHTOOL_GRXCLSRLCNT:
2728 case ETHTOOL_GRXCLSRULE:
2729 case ETHTOOL_GRXCLSRLALL:
2730 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2731 break;
2732 case ETHTOOL_SRXFH:
2733 case ETHTOOL_SRXCLSRLDEL:
2734 case ETHTOOL_SRXCLSRLINS:
2735 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2736 break;
2737 case ETHTOOL_FLASHDEV:
2738 rc = ethtool_flash_device(dev, useraddr);
2739 break;
2740 case ETHTOOL_RESET:
2741 rc = ethtool_reset(dev, useraddr);
2742 break;
2743 case ETHTOOL_GSSET_INFO:
2744 rc = ethtool_get_sset_info(dev, useraddr);
2745 break;
2746 case ETHTOOL_GRXFHINDIR:
2747 rc = ethtool_get_rxfh_indir(dev, useraddr);
2748 break;
2749 case ETHTOOL_SRXFHINDIR:
2750 rc = ethtool_set_rxfh_indir(dev, useraddr);
2751 break;
2752 case ETHTOOL_GRSSH:
2753 rc = ethtool_get_rxfh(dev, useraddr);
2754 break;
2755 case ETHTOOL_SRSSH:
2756 rc = ethtool_set_rxfh(dev, useraddr);
2757 break;
2758 case ETHTOOL_GFEATURES:
2759 rc = ethtool_get_features(dev, useraddr);
2760 break;
2761 case ETHTOOL_SFEATURES:
2762 rc = ethtool_set_features(dev, useraddr);
2763 break;
2764 case ETHTOOL_GTXCSUM:
2765 case ETHTOOL_GRXCSUM:
2766 case ETHTOOL_GSG:
2767 case ETHTOOL_GTSO:
2768 case ETHTOOL_GGSO:
2769 case ETHTOOL_GGRO:
2770 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2771 break;
2772 case ETHTOOL_STXCSUM:
2773 case ETHTOOL_SRXCSUM:
2774 case ETHTOOL_SSG:
2775 case ETHTOOL_STSO:
2776 case ETHTOOL_SGSO:
2777 case ETHTOOL_SGRO:
2778 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2779 break;
2780 case ETHTOOL_GCHANNELS:
2781 rc = ethtool_get_channels(dev, useraddr);
2782 break;
2783 case ETHTOOL_SCHANNELS:
2784 rc = ethtool_set_channels(dev, useraddr);
2785 break;
2786 case ETHTOOL_SET_DUMP:
2787 rc = ethtool_set_dump(dev, useraddr);
2788 break;
2789 case ETHTOOL_GET_DUMP_FLAG:
2790 rc = ethtool_get_dump_flag(dev, useraddr);
2791 break;
2792 case ETHTOOL_GET_DUMP_DATA:
2793 rc = ethtool_get_dump_data(dev, useraddr);
2794 break;
2795 case ETHTOOL_GET_TS_INFO:
2796 rc = ethtool_get_ts_info(dev, useraddr);
2797 break;
2798 case ETHTOOL_GMODULEINFO:
2799 rc = ethtool_get_module_info(dev, useraddr);
2800 break;
2801 case ETHTOOL_GMODULEEEPROM:
2802 rc = ethtool_get_module_eeprom(dev, useraddr);
2803 break;
2804 case ETHTOOL_GTUNABLE:
2805 rc = ethtool_get_tunable(dev, useraddr);
2806 break;
2807 case ETHTOOL_STUNABLE:
2808 rc = ethtool_set_tunable(dev, useraddr);
2809 break;
2810 case ETHTOOL_GPHYSTATS:
2811 rc = ethtool_get_phy_stats(dev, useraddr);
2812 break;
2813 case ETHTOOL_PERQUEUE:
2814 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2815 break;
2816 case ETHTOOL_GLINKSETTINGS:
2817 rc = ethtool_get_link_ksettings(dev, useraddr);
2818 break;
2819 case ETHTOOL_SLINKSETTINGS:
2820 rc = ethtool_set_link_ksettings(dev, useraddr);
2821 break;
2822 case ETHTOOL_PHY_GTUNABLE:
2823 rc = get_phy_tunable(dev, useraddr);
2824 break;
2825 case ETHTOOL_PHY_STUNABLE:
2826 rc = set_phy_tunable(dev, useraddr);
2827 break;
2828 case ETHTOOL_GFECPARAM:
2829 rc = ethtool_get_fecparam(dev, useraddr);
2830 break;
2831 case ETHTOOL_SFECPARAM:
2832 rc = ethtool_set_fecparam(dev, useraddr);
2833 break;
2834 default:
2835 rc = -EOPNOTSUPP;
2836 }
2837
2838 if (dev->ethtool_ops->complete)
2839 dev->ethtool_ops->complete(dev);
2840
2841 if (old_features != dev->features)
2842 netdev_features_change(dev);
2843
2844 return rc;
2845 }
2846
2847 struct ethtool_rx_flow_key {
2848 struct flow_dissector_key_basic basic;
2849 union {
2850 struct flow_dissector_key_ipv4_addrs ipv4;
2851 struct flow_dissector_key_ipv6_addrs ipv6;
2852 };
2853 struct flow_dissector_key_ports tp;
2854 struct flow_dissector_key_ip ip;
2855 struct flow_dissector_key_vlan vlan;
2856 struct flow_dissector_key_eth_addrs eth_addrs;
2857 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
2858
2859 struct ethtool_rx_flow_match {
2860 struct flow_dissector dissector;
2861 struct ethtool_rx_flow_key key;
2862 struct ethtool_rx_flow_key mask;
2863 };
2864
2865 struct ethtool_rx_flow_rule *
ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input * input)2866 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
2867 {
2868 const struct ethtool_rx_flow_spec *fs = input->fs;
2869 static struct in6_addr zero_addr = {};
2870 struct ethtool_rx_flow_match *match;
2871 struct ethtool_rx_flow_rule *flow;
2872 struct flow_action_entry *act;
2873
2874 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
2875 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
2876 if (!flow)
2877 return ERR_PTR(-ENOMEM);
2878
2879 /* ethtool_rx supports only one single action per rule. */
2880 flow->rule = flow_rule_alloc(1);
2881 if (!flow->rule) {
2882 kfree(flow);
2883 return ERR_PTR(-ENOMEM);
2884 }
2885
2886 match = (struct ethtool_rx_flow_match *)flow->priv;
2887 flow->rule->match.dissector = &match->dissector;
2888 flow->rule->match.mask = &match->mask;
2889 flow->rule->match.key = &match->key;
2890
2891 match->mask.basic.n_proto = htons(0xffff);
2892
2893 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
2894 case ETHER_FLOW: {
2895 const struct ethhdr *ether_spec, *ether_m_spec;
2896
2897 ether_spec = &fs->h_u.ether_spec;
2898 ether_m_spec = &fs->m_u.ether_spec;
2899
2900 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
2901 ether_addr_copy(match->key.eth_addrs.src,
2902 ether_spec->h_source);
2903 ether_addr_copy(match->mask.eth_addrs.src,
2904 ether_m_spec->h_source);
2905 }
2906 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
2907 ether_addr_copy(match->key.eth_addrs.dst,
2908 ether_spec->h_dest);
2909 ether_addr_copy(match->mask.eth_addrs.dst,
2910 ether_m_spec->h_dest);
2911 }
2912 if (ether_m_spec->h_proto) {
2913 match->key.basic.n_proto = ether_spec->h_proto;
2914 match->mask.basic.n_proto = ether_m_spec->h_proto;
2915 }
2916 }
2917 break;
2918 case TCP_V4_FLOW:
2919 case UDP_V4_FLOW: {
2920 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
2921
2922 match->key.basic.n_proto = htons(ETH_P_IP);
2923
2924 v4_spec = &fs->h_u.tcp_ip4_spec;
2925 v4_m_spec = &fs->m_u.tcp_ip4_spec;
2926
2927 if (v4_m_spec->ip4src) {
2928 match->key.ipv4.src = v4_spec->ip4src;
2929 match->mask.ipv4.src = v4_m_spec->ip4src;
2930 }
2931 if (v4_m_spec->ip4dst) {
2932 match->key.ipv4.dst = v4_spec->ip4dst;
2933 match->mask.ipv4.dst = v4_m_spec->ip4dst;
2934 }
2935 if (v4_m_spec->ip4src ||
2936 v4_m_spec->ip4dst) {
2937 match->dissector.used_keys |=
2938 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
2939 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
2940 offsetof(struct ethtool_rx_flow_key, ipv4);
2941 }
2942 if (v4_m_spec->psrc) {
2943 match->key.tp.src = v4_spec->psrc;
2944 match->mask.tp.src = v4_m_spec->psrc;
2945 }
2946 if (v4_m_spec->pdst) {
2947 match->key.tp.dst = v4_spec->pdst;
2948 match->mask.tp.dst = v4_m_spec->pdst;
2949 }
2950 if (v4_m_spec->psrc ||
2951 v4_m_spec->pdst) {
2952 match->dissector.used_keys |=
2953 BIT(FLOW_DISSECTOR_KEY_PORTS);
2954 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
2955 offsetof(struct ethtool_rx_flow_key, tp);
2956 }
2957 if (v4_m_spec->tos) {
2958 match->key.ip.tos = v4_spec->tos;
2959 match->mask.ip.tos = v4_m_spec->tos;
2960 match->dissector.used_keys |=
2961 BIT(FLOW_DISSECTOR_KEY_IP);
2962 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
2963 offsetof(struct ethtool_rx_flow_key, ip);
2964 }
2965 }
2966 break;
2967 case TCP_V6_FLOW:
2968 case UDP_V6_FLOW: {
2969 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
2970
2971 match->key.basic.n_proto = htons(ETH_P_IPV6);
2972
2973 v6_spec = &fs->h_u.tcp_ip6_spec;
2974 v6_m_spec = &fs->m_u.tcp_ip6_spec;
2975 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2976 memcpy(&match->key.ipv6.src, v6_spec->ip6src,
2977 sizeof(match->key.ipv6.src));
2978 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
2979 sizeof(match->mask.ipv6.src));
2980 }
2981 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
2982 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
2983 sizeof(match->key.ipv6.dst));
2984 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
2985 sizeof(match->mask.ipv6.dst));
2986 }
2987 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
2988 memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2989 match->dissector.used_keys |=
2990 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
2991 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
2992 offsetof(struct ethtool_rx_flow_key, ipv6);
2993 }
2994 if (v6_m_spec->psrc) {
2995 match->key.tp.src = v6_spec->psrc;
2996 match->mask.tp.src = v6_m_spec->psrc;
2997 }
2998 if (v6_m_spec->pdst) {
2999 match->key.tp.dst = v6_spec->pdst;
3000 match->mask.tp.dst = v6_m_spec->pdst;
3001 }
3002 if (v6_m_spec->psrc ||
3003 v6_m_spec->pdst) {
3004 match->dissector.used_keys |=
3005 BIT(FLOW_DISSECTOR_KEY_PORTS);
3006 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3007 offsetof(struct ethtool_rx_flow_key, tp);
3008 }
3009 if (v6_m_spec->tclass) {
3010 match->key.ip.tos = v6_spec->tclass;
3011 match->mask.ip.tos = v6_m_spec->tclass;
3012 match->dissector.used_keys |=
3013 BIT(FLOW_DISSECTOR_KEY_IP);
3014 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3015 offsetof(struct ethtool_rx_flow_key, ip);
3016 }
3017 }
3018 break;
3019 default:
3020 ethtool_rx_flow_rule_destroy(flow);
3021 return ERR_PTR(-EINVAL);
3022 }
3023
3024 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3025 case TCP_V4_FLOW:
3026 case TCP_V6_FLOW:
3027 match->key.basic.ip_proto = IPPROTO_TCP;
3028 break;
3029 case UDP_V4_FLOW:
3030 case UDP_V6_FLOW:
3031 match->key.basic.ip_proto = IPPROTO_UDP;
3032 break;
3033 }
3034 match->mask.basic.ip_proto = 0xff;
3035
3036 match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
3037 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3038 offsetof(struct ethtool_rx_flow_key, basic);
3039
3040 if (fs->flow_type & FLOW_EXT) {
3041 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3042 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3043
3044 if (ext_m_spec->vlan_etype) {
3045 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3046 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3047 }
3048
3049 if (ext_m_spec->vlan_tci) {
3050 match->key.vlan.vlan_id =
3051 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3052 match->mask.vlan.vlan_id =
3053 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3054
3055 match->key.vlan.vlan_dei =
3056 !!(ext_h_spec->vlan_tci & htons(0x1000));
3057 match->mask.vlan.vlan_dei =
3058 !!(ext_m_spec->vlan_tci & htons(0x1000));
3059
3060 match->key.vlan.vlan_priority =
3061 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3062 match->mask.vlan.vlan_priority =
3063 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3064 }
3065
3066 if (ext_m_spec->vlan_etype ||
3067 ext_m_spec->vlan_tci) {
3068 match->dissector.used_keys |=
3069 BIT(FLOW_DISSECTOR_KEY_VLAN);
3070 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3071 offsetof(struct ethtool_rx_flow_key, vlan);
3072 }
3073 }
3074 if (fs->flow_type & FLOW_MAC_EXT) {
3075 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3076 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3077
3078 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3079 ETH_ALEN);
3080 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3081 ETH_ALEN);
3082
3083 match->dissector.used_keys |=
3084 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3085 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3086 offsetof(struct ethtool_rx_flow_key, eth_addrs);
3087 }
3088
3089 act = &flow->rule->action.entries[0];
3090 switch (fs->ring_cookie) {
3091 case RX_CLS_FLOW_DISC:
3092 act->id = FLOW_ACTION_DROP;
3093 break;
3094 case RX_CLS_FLOW_WAKE:
3095 act->id = FLOW_ACTION_WAKE;
3096 break;
3097 default:
3098 act->id = FLOW_ACTION_QUEUE;
3099 if (fs->flow_type & FLOW_RSS)
3100 act->queue.ctx = input->rss_ctx;
3101
3102 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3103 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3104 break;
3105 }
3106
3107 return flow;
3108 }
3109 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3110
ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule * flow)3111 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3112 {
3113 kfree(flow->rule);
3114 kfree(flow);
3115 }
3116 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);
3117
