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 [NETIF_F_GSO_FRAGLIST_BIT] = "tx-gso-list",
96
97 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
98 [NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
99 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
100 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
101 [NETIF_F_RXHASH_BIT] = "rx-hashing",
102 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
103 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
104 [NETIF_F_LOOPBACK_BIT] = "loopback",
105 [NETIF_F_RXFCS_BIT] = "rx-fcs",
106 [NETIF_F_RXALL_BIT] = "rx-all",
107 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
108 [NETIF_F_HW_TC_BIT] = "hw-tc-offload",
109 [NETIF_F_HW_ESP_BIT] = "esp-hw-offload",
110 [NETIF_F_HW_ESP_TX_CSUM_BIT] = "esp-tx-csum-hw-offload",
111 [NETIF_F_RX_UDP_TUNNEL_PORT_BIT] = "rx-udp_tunnel-port-offload",
112 [NETIF_F_HW_TLS_RECORD_BIT] = "tls-hw-record",
113 [NETIF_F_HW_TLS_TX_BIT] = "tls-hw-tx-offload",
114 [NETIF_F_HW_TLS_RX_BIT] = "tls-hw-rx-offload",
115 };
116
117 static const char
118 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
119 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
120 [ETH_RSS_HASH_XOR_BIT] = "xor",
121 [ETH_RSS_HASH_CRC32_BIT] = "crc32",
122 };
123
124 static const char
125 tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
126 [ETHTOOL_ID_UNSPEC] = "Unspec",
127 [ETHTOOL_RX_COPYBREAK] = "rx-copybreak",
128 [ETHTOOL_TX_COPYBREAK] = "tx-copybreak",
129 [ETHTOOL_PFC_PREVENTION_TOUT] = "pfc-prevention-tout",
130 };
131
132 static const char
133 phy_tunable_strings[__ETHTOOL_PHY_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
134 [ETHTOOL_ID_UNSPEC] = "Unspec",
135 [ETHTOOL_PHY_DOWNSHIFT] = "phy-downshift",
136 [ETHTOOL_PHY_FAST_LINK_DOWN] = "phy-fast-link-down",
137 [ETHTOOL_PHY_EDPD] = "phy-energy-detect-power-down",
138 };
139
ethtool_get_features(struct net_device * dev,void __user * useraddr)140 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
141 {
142 struct ethtool_gfeatures cmd = {
143 .cmd = ETHTOOL_GFEATURES,
144 .size = ETHTOOL_DEV_FEATURE_WORDS,
145 };
146 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
147 u32 __user *sizeaddr;
148 u32 copy_size;
149 int i;
150
151 /* in case feature bits run out again */
152 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
153
154 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
155 features[i].available = (u32)(dev->hw_features >> (32 * i));
156 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
157 features[i].active = (u32)(dev->features >> (32 * i));
158 features[i].never_changed =
159 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
160 }
161
162 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
163 if (get_user(copy_size, sizeaddr))
164 return -EFAULT;
165
166 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
167 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
168
169 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
170 return -EFAULT;
171 useraddr += sizeof(cmd);
172 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
173 return -EFAULT;
174
175 return 0;
176 }
177
ethtool_set_features(struct net_device * dev,void __user * useraddr)178 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
179 {
180 struct ethtool_sfeatures cmd;
181 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
182 netdev_features_t wanted = 0, valid = 0;
183 int i, ret = 0;
184
185 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
186 return -EFAULT;
187 useraddr += sizeof(cmd);
188
189 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
190 return -EINVAL;
191
192 if (copy_from_user(features, useraddr, sizeof(features)))
193 return -EFAULT;
194
195 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
196 valid |= (netdev_features_t)features[i].valid << (32 * i);
197 wanted |= (netdev_features_t)features[i].requested << (32 * i);
198 }
199
200 if (valid & ~NETIF_F_ETHTOOL_BITS)
201 return -EINVAL;
202
203 if (valid & ~dev->hw_features) {
204 valid &= dev->hw_features;
205 ret |= ETHTOOL_F_UNSUPPORTED;
206 }
207
208 dev->wanted_features &= ~valid;
209 dev->wanted_features |= wanted & valid;
210 __netdev_update_features(dev);
211
212 if ((dev->wanted_features ^ dev->features) & valid)
213 ret |= ETHTOOL_F_WISH;
214
215 return ret;
216 }
217
__ethtool_get_sset_count(struct net_device * dev,int sset)218 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
219 {
220 const struct ethtool_ops *ops = dev->ethtool_ops;
221
222 if (sset == ETH_SS_FEATURES)
223 return ARRAY_SIZE(netdev_features_strings);
224
225 if (sset == ETH_SS_RSS_HASH_FUNCS)
226 return ARRAY_SIZE(rss_hash_func_strings);
227
228 if (sset == ETH_SS_TUNABLES)
229 return ARRAY_SIZE(tunable_strings);
230
231 if (sset == ETH_SS_PHY_TUNABLES)
232 return ARRAY_SIZE(phy_tunable_strings);
233
234 if (sset == ETH_SS_PHY_STATS && dev->phydev &&
235 !ops->get_ethtool_phy_stats)
236 return phy_ethtool_get_sset_count(dev->phydev);
237
238 if (ops->get_sset_count && ops->get_strings)
239 return ops->get_sset_count(dev, sset);
240 else
241 return -EOPNOTSUPP;
242 }
243
__ethtool_get_strings(struct net_device * dev,u32 stringset,u8 * data)244 static void __ethtool_get_strings(struct net_device *dev,
245 u32 stringset, u8 *data)
246 {
247 const struct ethtool_ops *ops = dev->ethtool_ops;
248
249 if (stringset == ETH_SS_FEATURES)
250 memcpy(data, netdev_features_strings,
251 sizeof(netdev_features_strings));
252 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
253 memcpy(data, rss_hash_func_strings,
254 sizeof(rss_hash_func_strings));
255 else if (stringset == ETH_SS_TUNABLES)
256 memcpy(data, tunable_strings, sizeof(tunable_strings));
257 else if (stringset == ETH_SS_PHY_TUNABLES)
258 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings));
259 else if (stringset == ETH_SS_PHY_STATS && dev->phydev &&
260 !ops->get_ethtool_phy_stats)
261 phy_ethtool_get_strings(dev->phydev, data);
262 else
263 /* ops->get_strings is valid because checked earlier */
264 ops->get_strings(dev, stringset, data);
265 }
266
ethtool_get_feature_mask(u32 eth_cmd)267 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
268 {
269 /* feature masks of legacy discrete ethtool ops */
270
271 switch (eth_cmd) {
272 case ETHTOOL_GTXCSUM:
273 case ETHTOOL_STXCSUM:
274 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
275 case ETHTOOL_GRXCSUM:
276 case ETHTOOL_SRXCSUM:
277 return NETIF_F_RXCSUM;
278 case ETHTOOL_GSG:
279 case ETHTOOL_SSG:
280 return NETIF_F_SG;
281 case ETHTOOL_GTSO:
282 case ETHTOOL_STSO:
283 return NETIF_F_ALL_TSO;
284 case ETHTOOL_GGSO:
285 case ETHTOOL_SGSO:
286 return NETIF_F_GSO;
287 case ETHTOOL_GGRO:
288 case ETHTOOL_SGRO:
289 return NETIF_F_GRO;
290 default:
291 BUG();
292 }
293 }
294
ethtool_get_one_feature(struct net_device * dev,char __user * useraddr,u32 ethcmd)295 static int ethtool_get_one_feature(struct net_device *dev,
296 char __user *useraddr, u32 ethcmd)
297 {
298 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
299 struct ethtool_value edata = {
300 .cmd = ethcmd,
301 .data = !!(dev->features & mask),
302 };
303
304 if (copy_to_user(useraddr, &edata, sizeof(edata)))
305 return -EFAULT;
306 return 0;
307 }
308
ethtool_set_one_feature(struct net_device * dev,void __user * useraddr,u32 ethcmd)309 static int ethtool_set_one_feature(struct net_device *dev,
310 void __user *useraddr, u32 ethcmd)
311 {
312 struct ethtool_value edata;
313 netdev_features_t mask;
314
315 if (copy_from_user(&edata, useraddr, sizeof(edata)))
316 return -EFAULT;
317
318 mask = ethtool_get_feature_mask(ethcmd);
319 mask &= dev->hw_features;
320 if (!mask)
321 return -EOPNOTSUPP;
322
323 if (edata.data)
324 dev->wanted_features |= mask;
325 else
326 dev->wanted_features &= ~mask;
327
328 __netdev_update_features(dev);
329
330 return 0;
331 }
332
333 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
334 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
335 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
336 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
337 NETIF_F_RXHASH)
338
__ethtool_get_flags(struct net_device * dev)339 static u32 __ethtool_get_flags(struct net_device *dev)
340 {
341 u32 flags = 0;
342
343 if (dev->features & NETIF_F_LRO)
344 flags |= ETH_FLAG_LRO;
345 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
346 flags |= ETH_FLAG_RXVLAN;
347 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
348 flags |= ETH_FLAG_TXVLAN;
349 if (dev->features & NETIF_F_NTUPLE)
350 flags |= ETH_FLAG_NTUPLE;
351 if (dev->features & NETIF_F_RXHASH)
352 flags |= ETH_FLAG_RXHASH;
353
354 return flags;
355 }
356
__ethtool_set_flags(struct net_device * dev,u32 data)357 static int __ethtool_set_flags(struct net_device *dev, u32 data)
358 {
359 netdev_features_t features = 0, changed;
360
361 if (data & ~ETH_ALL_FLAGS)
362 return -EINVAL;
363
364 if (data & ETH_FLAG_LRO)
365 features |= NETIF_F_LRO;
366 if (data & ETH_FLAG_RXVLAN)
367 features |= NETIF_F_HW_VLAN_CTAG_RX;
368 if (data & ETH_FLAG_TXVLAN)
369 features |= NETIF_F_HW_VLAN_CTAG_TX;
370 if (data & ETH_FLAG_NTUPLE)
371 features |= NETIF_F_NTUPLE;
372 if (data & ETH_FLAG_RXHASH)
373 features |= NETIF_F_RXHASH;
374
375 /* allow changing only bits set in hw_features */
376 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
377 if (changed & ~dev->hw_features)
378 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
379
380 dev->wanted_features =
381 (dev->wanted_features & ~changed) | (features & changed);
382
383 __netdev_update_features(dev);
384
385 return 0;
386 }
387
388 /* 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)389 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst,
390 struct ethtool_link_ksettings *src)
391 {
392 unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS);
393 unsigned int idx = 0;
394
395 for (; idx < size; idx++) {
396 dst->link_modes.supported[idx] &=
397 src->link_modes.supported[idx];
398 dst->link_modes.advertising[idx] &=
399 src->link_modes.advertising[idx];
400 }
401 }
402 EXPORT_SYMBOL(ethtool_intersect_link_masks);
403
ethtool_convert_legacy_u32_to_link_mode(unsigned long * dst,u32 legacy_u32)404 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
405 u32 legacy_u32)
406 {
407 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
408 dst[0] = legacy_u32;
409 }
410 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
411
412 /* 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)413 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
414 const unsigned long *src)
415 {
416 bool retval = true;
417
418 /* TODO: following test will soon always be true */
419 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
420 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
421
422 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
423 bitmap_fill(ext, 32);
424 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
425 if (bitmap_intersects(ext, src,
426 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
427 /* src mask goes beyond bit 31 */
428 retval = false;
429 }
430 }
431 *legacy_u32 = src[0];
432 return retval;
433 }
434 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
435
436 /* return false if legacy contained non-0 deprecated fields
437 * maxtxpkt/maxrxpkt. rest of ksettings always updated
438 */
439 static bool
convert_legacy_settings_to_link_ksettings(struct ethtool_link_ksettings * link_ksettings,const struct ethtool_cmd * legacy_settings)440 convert_legacy_settings_to_link_ksettings(
441 struct ethtool_link_ksettings *link_ksettings,
442 const struct ethtool_cmd *legacy_settings)
443 {
444 bool retval = true;
445
446 memset(link_ksettings, 0, sizeof(*link_ksettings));
447
448 /* This is used to tell users that driver is still using these
449 * deprecated legacy fields, and they should not use
450 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
451 */
452 if (legacy_settings->maxtxpkt ||
453 legacy_settings->maxrxpkt)
454 retval = false;
455
456 ethtool_convert_legacy_u32_to_link_mode(
457 link_ksettings->link_modes.supported,
458 legacy_settings->supported);
459 ethtool_convert_legacy_u32_to_link_mode(
460 link_ksettings->link_modes.advertising,
461 legacy_settings->advertising);
462 ethtool_convert_legacy_u32_to_link_mode(
463 link_ksettings->link_modes.lp_advertising,
464 legacy_settings->lp_advertising);
465 link_ksettings->base.speed
466 = ethtool_cmd_speed(legacy_settings);
467 link_ksettings->base.duplex
468 = legacy_settings->duplex;
469 link_ksettings->base.port
470 = legacy_settings->port;
471 link_ksettings->base.phy_address
472 = legacy_settings->phy_address;
473 link_ksettings->base.autoneg
474 = legacy_settings->autoneg;
475 link_ksettings->base.mdio_support
476 = legacy_settings->mdio_support;
477 link_ksettings->base.eth_tp_mdix
478 = legacy_settings->eth_tp_mdix;
479 link_ksettings->base.eth_tp_mdix_ctrl
480 = legacy_settings->eth_tp_mdix_ctrl;
481 return retval;
482 }
483
484 /* return false if ksettings link modes had higher bits
485 * set. legacy_settings always updated (best effort)
486 */
487 static bool
convert_link_ksettings_to_legacy_settings(struct ethtool_cmd * legacy_settings,const struct ethtool_link_ksettings * link_ksettings)488 convert_link_ksettings_to_legacy_settings(
489 struct ethtool_cmd *legacy_settings,
490 const struct ethtool_link_ksettings *link_ksettings)
491 {
492 bool retval = true;
493
494 memset(legacy_settings, 0, sizeof(*legacy_settings));
495 /* this also clears the deprecated fields in legacy structure:
496 * __u8 transceiver;
497 * __u32 maxtxpkt;
498 * __u32 maxrxpkt;
499 */
500
501 retval &= ethtool_convert_link_mode_to_legacy_u32(
502 &legacy_settings->supported,
503 link_ksettings->link_modes.supported);
504 retval &= ethtool_convert_link_mode_to_legacy_u32(
505 &legacy_settings->advertising,
506 link_ksettings->link_modes.advertising);
507 retval &= ethtool_convert_link_mode_to_legacy_u32(
508 &legacy_settings->lp_advertising,
509 link_ksettings->link_modes.lp_advertising);
510 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
511 legacy_settings->duplex
512 = link_ksettings->base.duplex;
513 legacy_settings->port
514 = link_ksettings->base.port;
515 legacy_settings->phy_address
516 = link_ksettings->base.phy_address;
517 legacy_settings->autoneg
518 = link_ksettings->base.autoneg;
519 legacy_settings->mdio_support
520 = link_ksettings->base.mdio_support;
521 legacy_settings->eth_tp_mdix
522 = link_ksettings->base.eth_tp_mdix;
523 legacy_settings->eth_tp_mdix_ctrl
524 = link_ksettings->base.eth_tp_mdix_ctrl;
525 legacy_settings->transceiver
526 = link_ksettings->base.transceiver;
527 return retval;
528 }
529
530 /* number of 32-bit words to store the user's link mode bitmaps */
531 #define __ETHTOOL_LINK_MODE_MASK_NU32 \
532 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
533
534 /* layout of the struct passed from/to userland */
535 struct ethtool_link_usettings {
536 struct ethtool_link_settings base;
537 struct {
538 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
539 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
540 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
541 } link_modes;
542 };
543
544 /* Internal kernel helper to query a device ethtool_link_settings. */
__ethtool_get_link_ksettings(struct net_device * dev,struct ethtool_link_ksettings * link_ksettings)545 int __ethtool_get_link_ksettings(struct net_device *dev,
546 struct ethtool_link_ksettings *link_ksettings)
547 {
548 ASSERT_RTNL();
549
550 if (!dev->ethtool_ops->get_link_ksettings)
551 return -EOPNOTSUPP;
552
553 memset(link_ksettings, 0, sizeof(*link_ksettings));
554 return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings);
555 }
556 EXPORT_SYMBOL(__ethtool_get_link_ksettings);
557
558 /* convert ethtool_link_usettings in user space to a kernel internal
559 * ethtool_link_ksettings. return 0 on success, errno on error.
560 */
load_link_ksettings_from_user(struct ethtool_link_ksettings * to,const void __user * from)561 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
562 const void __user *from)
563 {
564 struct ethtool_link_usettings link_usettings;
565
566 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
567 return -EFAULT;
568
569 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
570 bitmap_from_arr32(to->link_modes.supported,
571 link_usettings.link_modes.supported,
572 __ETHTOOL_LINK_MODE_MASK_NBITS);
573 bitmap_from_arr32(to->link_modes.advertising,
574 link_usettings.link_modes.advertising,
575 __ETHTOOL_LINK_MODE_MASK_NBITS);
576 bitmap_from_arr32(to->link_modes.lp_advertising,
577 link_usettings.link_modes.lp_advertising,
578 __ETHTOOL_LINK_MODE_MASK_NBITS);
579
580 return 0;
581 }
582
583 /* convert a kernel internal ethtool_link_ksettings to
584 * ethtool_link_usettings in user space. return 0 on success, errno on
585 * error.
586 */
587 static int
store_link_ksettings_for_user(void __user * to,const struct ethtool_link_ksettings * from)588 store_link_ksettings_for_user(void __user *to,
589 const struct ethtool_link_ksettings *from)
590 {
591 struct ethtool_link_usettings link_usettings;
592
593 memcpy(&link_usettings, from, sizeof(link_usettings));
594 bitmap_to_arr32(link_usettings.link_modes.supported,
595 from->link_modes.supported,
596 __ETHTOOL_LINK_MODE_MASK_NBITS);
597 bitmap_to_arr32(link_usettings.link_modes.advertising,
598 from->link_modes.advertising,
599 __ETHTOOL_LINK_MODE_MASK_NBITS);
600 bitmap_to_arr32(link_usettings.link_modes.lp_advertising,
601 from->link_modes.lp_advertising,
602 __ETHTOOL_LINK_MODE_MASK_NBITS);
603
604 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
605 return -EFAULT;
606
607 return 0;
608 }
609
610 /* Query device for its ethtool_link_settings. */
ethtool_get_link_ksettings(struct net_device * dev,void __user * useraddr)611 static int ethtool_get_link_ksettings(struct net_device *dev,
612 void __user *useraddr)
613 {
614 int err = 0;
615 struct ethtool_link_ksettings link_ksettings;
616
617 ASSERT_RTNL();
618 if (!dev->ethtool_ops->get_link_ksettings)
619 return -EOPNOTSUPP;
620
621 /* handle bitmap nbits handshake */
622 if (copy_from_user(&link_ksettings.base, useraddr,
623 sizeof(link_ksettings.base)))
624 return -EFAULT;
625
626 if (__ETHTOOL_LINK_MODE_MASK_NU32
627 != link_ksettings.base.link_mode_masks_nwords) {
628 /* wrong link mode nbits requested */
629 memset(&link_ksettings, 0, sizeof(link_ksettings));
630 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
631 /* send back number of words required as negative val */
632 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
633 "need too many bits for link modes!");
634 link_ksettings.base.link_mode_masks_nwords
635 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
636
637 /* copy the base fields back to user, not the link
638 * mode bitmaps
639 */
640 if (copy_to_user(useraddr, &link_ksettings.base,
641 sizeof(link_ksettings.base)))
642 return -EFAULT;
643
644 return 0;
645 }
646
647 /* handshake successful: user/kernel agree on
648 * link_mode_masks_nwords
649 */
650
651 memset(&link_ksettings, 0, sizeof(link_ksettings));
652 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
653 if (err < 0)
654 return err;
655
656 /* make sure we tell the right values to user */
657 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
658 link_ksettings.base.link_mode_masks_nwords
659 = __ETHTOOL_LINK_MODE_MASK_NU32;
660
661 return store_link_ksettings_for_user(useraddr, &link_ksettings);
662 }
663
664 /* Update device ethtool_link_settings. */
ethtool_set_link_ksettings(struct net_device * dev,void __user * useraddr)665 static int ethtool_set_link_ksettings(struct net_device *dev,
666 void __user *useraddr)
667 {
668 int err;
669 struct ethtool_link_ksettings link_ksettings;
670
671 ASSERT_RTNL();
672
673 if (!dev->ethtool_ops->set_link_ksettings)
674 return -EOPNOTSUPP;
675
676 /* make sure nbits field has expected value */
677 if (copy_from_user(&link_ksettings.base, useraddr,
678 sizeof(link_ksettings.base)))
679 return -EFAULT;
680
681 if (__ETHTOOL_LINK_MODE_MASK_NU32
682 != link_ksettings.base.link_mode_masks_nwords)
683 return -EINVAL;
684
685 /* copy the whole structure, now that we know it has expected
686 * format
687 */
688 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
689 if (err)
690 return err;
691
692 /* re-check nwords field, just in case */
693 if (__ETHTOOL_LINK_MODE_MASK_NU32
694 != link_ksettings.base.link_mode_masks_nwords)
695 return -EINVAL;
696
697 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
698 }
699
700 /* Query device for its ethtool_cmd settings.
701 *
702 * Backward compatibility note: for compatibility with legacy ethtool, this is
703 * now implemented via get_link_ksettings. When driver reports higher link mode
704 * bits, a kernel warning is logged once (with name of 1st driver/device) to
705 * recommend user to upgrade ethtool, but the command is successful (only the
706 * lower link mode bits reported back to user). Deprecated fields from
707 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero.
708 */
ethtool_get_settings(struct net_device * dev,void __user * useraddr)709 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
710 {
711 struct ethtool_link_ksettings link_ksettings;
712 struct ethtool_cmd cmd;
713 int err;
714
715 ASSERT_RTNL();
716 if (!dev->ethtool_ops->get_link_ksettings)
717 return -EOPNOTSUPP;
718
719 memset(&link_ksettings, 0, sizeof(link_ksettings));
720 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
721 if (err < 0)
722 return err;
723 convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings);
724
725 /* send a sensible cmd tag back to user */
726 cmd.cmd = ETHTOOL_GSET;
727
728 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
729 return -EFAULT;
730
731 return 0;
732 }
733
734 /* Update device link settings with given ethtool_cmd.
735 *
736 * Backward compatibility note: for compatibility with legacy ethtool, this is
737 * now always implemented via set_link_settings. When user's request updates
738 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
739 * warning is logged once (with name of 1st driver/device) to recommend user to
740 * upgrade ethtool, and the request is rejected.
741 */
ethtool_set_settings(struct net_device * dev,void __user * useraddr)742 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
743 {
744 struct ethtool_link_ksettings link_ksettings;
745 struct ethtool_cmd cmd;
746
747 ASSERT_RTNL();
748
749 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
750 return -EFAULT;
751 if (!dev->ethtool_ops->set_link_ksettings)
752 return -EOPNOTSUPP;
753
754 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd))
755 return -EINVAL;
756 link_ksettings.base.link_mode_masks_nwords =
757 __ETHTOOL_LINK_MODE_MASK_NU32;
758 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
759 }
760
ethtool_get_drvinfo(struct net_device * dev,void __user * useraddr)761 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
762 void __user *useraddr)
763 {
764 struct ethtool_drvinfo info;
765 const struct ethtool_ops *ops = dev->ethtool_ops;
766
767 memset(&info, 0, sizeof(info));
768 info.cmd = ETHTOOL_GDRVINFO;
769 if (ops->get_drvinfo) {
770 ops->get_drvinfo(dev, &info);
771 } else if (dev->dev.parent && dev->dev.parent->driver) {
772 strlcpy(info.bus_info, dev_name(dev->dev.parent),
773 sizeof(info.bus_info));
774 strlcpy(info.driver, dev->dev.parent->driver->name,
775 sizeof(info.driver));
776 } else {
777 return -EOPNOTSUPP;
778 }
779
780 /*
781 * this method of obtaining string set info is deprecated;
782 * Use ETHTOOL_GSSET_INFO instead.
783 */
784 if (ops->get_sset_count) {
785 int rc;
786
787 rc = ops->get_sset_count(dev, ETH_SS_TEST);
788 if (rc >= 0)
789 info.testinfo_len = rc;
790 rc = ops->get_sset_count(dev, ETH_SS_STATS);
791 if (rc >= 0)
792 info.n_stats = rc;
793 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
794 if (rc >= 0)
795 info.n_priv_flags = rc;
796 }
797 if (ops->get_regs_len) {
798 int ret = ops->get_regs_len(dev);
799
800 if (ret > 0)
801 info.regdump_len = ret;
802 }
803
804 if (ops->get_eeprom_len)
805 info.eedump_len = ops->get_eeprom_len(dev);
806
807 if (!info.fw_version[0])
808 devlink_compat_running_version(dev, info.fw_version,
809 sizeof(info.fw_version));
810
811 if (copy_to_user(useraddr, &info, sizeof(info)))
812 return -EFAULT;
813 return 0;
814 }
815
ethtool_get_sset_info(struct net_device * dev,void __user * useraddr)816 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
817 void __user *useraddr)
818 {
819 struct ethtool_sset_info info;
820 u64 sset_mask;
821 int i, idx = 0, n_bits = 0, ret, rc;
822 u32 *info_buf = NULL;
823
824 if (copy_from_user(&info, useraddr, sizeof(info)))
825 return -EFAULT;
826
827 /* store copy of mask, because we zero struct later on */
828 sset_mask = info.sset_mask;
829 if (!sset_mask)
830 return 0;
831
832 /* calculate size of return buffer */
833 n_bits = hweight64(sset_mask);
834
835 memset(&info, 0, sizeof(info));
836 info.cmd = ETHTOOL_GSSET_INFO;
837
838 info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER);
839 if (!info_buf)
840 return -ENOMEM;
841
842 /*
843 * fill return buffer based on input bitmask and successful
844 * get_sset_count return
845 */
846 for (i = 0; i < 64; i++) {
847 if (!(sset_mask & (1ULL << i)))
848 continue;
849
850 rc = __ethtool_get_sset_count(dev, i);
851 if (rc >= 0) {
852 info.sset_mask |= (1ULL << i);
853 info_buf[idx++] = rc;
854 }
855 }
856
857 ret = -EFAULT;
858 if (copy_to_user(useraddr, &info, sizeof(info)))
859 goto out;
860
861 useraddr += offsetof(struct ethtool_sset_info, data);
862 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
863 goto out;
864
865 ret = 0;
866
867 out:
868 kfree(info_buf);
869 return ret;
870 }
871
ethtool_set_rxnfc(struct net_device * dev,u32 cmd,void __user * useraddr)872 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
873 u32 cmd, void __user *useraddr)
874 {
875 struct ethtool_rxnfc info;
876 size_t info_size = sizeof(info);
877 int rc;
878
879 if (!dev->ethtool_ops->set_rxnfc)
880 return -EOPNOTSUPP;
881
882 /* struct ethtool_rxnfc was originally defined for
883 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
884 * members. User-space might still be using that
885 * definition. */
886 if (cmd == ETHTOOL_SRXFH)
887 info_size = (offsetof(struct ethtool_rxnfc, data) +
888 sizeof(info.data));
889
890 if (copy_from_user(&info, useraddr, info_size))
891 return -EFAULT;
892
893 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
894 if (rc)
895 return rc;
896
897 if (cmd == ETHTOOL_SRXCLSRLINS &&
898 copy_to_user(useraddr, &info, info_size))
899 return -EFAULT;
900
901 return 0;
902 }
903
ethtool_get_rxnfc(struct net_device * dev,u32 cmd,void __user * useraddr)904 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
905 u32 cmd, void __user *useraddr)
906 {
907 struct ethtool_rxnfc info;
908 size_t info_size = sizeof(info);
909 const struct ethtool_ops *ops = dev->ethtool_ops;
910 int ret;
911 void *rule_buf = NULL;
912
913 if (!ops->get_rxnfc)
914 return -EOPNOTSUPP;
915
916 /* struct ethtool_rxnfc was originally defined for
917 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
918 * members. User-space might still be using that
919 * definition. */
920 if (cmd == ETHTOOL_GRXFH)
921 info_size = (offsetof(struct ethtool_rxnfc, data) +
922 sizeof(info.data));
923
924 if (copy_from_user(&info, useraddr, info_size))
925 return -EFAULT;
926
927 /* If FLOW_RSS was requested then user-space must be using the
928 * new definition, as FLOW_RSS is newer.
929 */
930 if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) {
931 info_size = sizeof(info);
932 if (copy_from_user(&info, useraddr, info_size))
933 return -EFAULT;
934 /* Since malicious users may modify the original data,
935 * we need to check whether FLOW_RSS is still requested.
936 */
937 if (!(info.flow_type & FLOW_RSS))
938 return -EINVAL;
939 }
940
941 if (info.cmd != cmd)
942 return -EINVAL;
943
944 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
945 if (info.rule_cnt > 0) {
946 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
947 rule_buf = kcalloc(info.rule_cnt, sizeof(u32),
948 GFP_USER);
949 if (!rule_buf)
950 return -ENOMEM;
951 }
952 }
953
954 ret = ops->get_rxnfc(dev, &info, rule_buf);
955 if (ret < 0)
956 goto err_out;
957
958 ret = -EFAULT;
959 if (copy_to_user(useraddr, &info, info_size))
960 goto err_out;
961
962 if (rule_buf) {
963 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
964 if (copy_to_user(useraddr, rule_buf,
965 info.rule_cnt * sizeof(u32)))
966 goto err_out;
967 }
968 ret = 0;
969
970 err_out:
971 kfree(rule_buf);
972
973 return ret;
974 }
975
ethtool_copy_validate_indir(u32 * indir,void __user * useraddr,struct ethtool_rxnfc * rx_rings,u32 size)976 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
977 struct ethtool_rxnfc *rx_rings,
978 u32 size)
979 {
980 int i;
981
982 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
983 return -EFAULT;
984
985 /* Validate ring indices */
986 for (i = 0; i < size; i++)
987 if (indir[i] >= rx_rings->data)
988 return -EINVAL;
989
990 return 0;
991 }
992
993 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
994
netdev_rss_key_fill(void * buffer,size_t len)995 void netdev_rss_key_fill(void *buffer, size_t len)
996 {
997 BUG_ON(len > sizeof(netdev_rss_key));
998 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
999 memcpy(buffer, netdev_rss_key, len);
1000 }
1001 EXPORT_SYMBOL(netdev_rss_key_fill);
1002
ethtool_get_max_rxfh_channel(struct net_device * dev,u32 * max)1003 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1004 {
1005 u32 dev_size, current_max = 0;
1006 u32 *indir;
1007 int ret;
1008
1009 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1010 !dev->ethtool_ops->get_rxfh)
1011 return -EOPNOTSUPP;
1012 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1013 if (dev_size == 0)
1014 return -EOPNOTSUPP;
1015
1016 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1017 if (!indir)
1018 return -ENOMEM;
1019
1020 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1021 if (ret)
1022 goto out;
1023
1024 while (dev_size--)
1025 current_max = max(current_max, indir[dev_size]);
1026
1027 *max = current_max;
1028
1029 out:
1030 kfree(indir);
1031 return ret;
1032 }
1033
ethtool_get_rxfh_indir(struct net_device * dev,void __user * useraddr)1034 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1035 void __user *useraddr)
1036 {
1037 u32 user_size, dev_size;
1038 u32 *indir;
1039 int ret;
1040
1041 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1042 !dev->ethtool_ops->get_rxfh)
1043 return -EOPNOTSUPP;
1044 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1045 if (dev_size == 0)
1046 return -EOPNOTSUPP;
1047
1048 if (copy_from_user(&user_size,
1049 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1050 sizeof(user_size)))
1051 return -EFAULT;
1052
1053 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1054 &dev_size, sizeof(dev_size)))
1055 return -EFAULT;
1056
1057 /* If the user buffer size is 0, this is just a query for the
1058 * device table size. Otherwise, if it's smaller than the
1059 * device table size it's an error.
1060 */
1061 if (user_size < dev_size)
1062 return user_size == 0 ? 0 : -EINVAL;
1063
1064 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1065 if (!indir)
1066 return -ENOMEM;
1067
1068 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1069 if (ret)
1070 goto out;
1071
1072 if (copy_to_user(useraddr +
1073 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1074 indir, dev_size * sizeof(indir[0])))
1075 ret = -EFAULT;
1076
1077 out:
1078 kfree(indir);
1079 return ret;
1080 }
1081
ethtool_set_rxfh_indir(struct net_device * dev,void __user * useraddr)1082 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1083 void __user *useraddr)
1084 {
1085 struct ethtool_rxnfc rx_rings;
1086 u32 user_size, dev_size, i;
1087 u32 *indir;
1088 const struct ethtool_ops *ops = dev->ethtool_ops;
1089 int ret;
1090 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
1091
1092 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
1093 !ops->get_rxnfc)
1094 return -EOPNOTSUPP;
1095
1096 dev_size = ops->get_rxfh_indir_size(dev);
1097 if (dev_size == 0)
1098 return -EOPNOTSUPP;
1099
1100 if (copy_from_user(&user_size,
1101 useraddr + offsetof(struct ethtool_rxfh_indir, size),
1102 sizeof(user_size)))
1103 return -EFAULT;
1104
1105 if (user_size != 0 && user_size != dev_size)
1106 return -EINVAL;
1107
1108 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1109 if (!indir)
1110 return -ENOMEM;
1111
1112 rx_rings.cmd = ETHTOOL_GRXRINGS;
1113 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1114 if (ret)
1115 goto out;
1116
1117 if (user_size == 0) {
1118 for (i = 0; i < dev_size; i++)
1119 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1120 } else {
1121 ret = ethtool_copy_validate_indir(indir,
1122 useraddr + ringidx_offset,
1123 &rx_rings,
1124 dev_size);
1125 if (ret)
1126 goto out;
1127 }
1128
1129 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
1130 if (ret)
1131 goto out;
1132
1133 /* indicate whether rxfh was set to default */
1134 if (user_size == 0)
1135 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1136 else
1137 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1138
1139 out:
1140 kfree(indir);
1141 return ret;
1142 }
1143
ethtool_get_rxfh(struct net_device * dev,void __user * useraddr)1144 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1145 void __user *useraddr)
1146 {
1147 int ret;
1148 const struct ethtool_ops *ops = dev->ethtool_ops;
1149 u32 user_indir_size, user_key_size;
1150 u32 dev_indir_size = 0, dev_key_size = 0;
1151 struct ethtool_rxfh rxfh;
1152 u32 total_size;
1153 u32 indir_bytes;
1154 u32 *indir = NULL;
1155 u8 dev_hfunc = 0;
1156 u8 *hkey = NULL;
1157 u8 *rss_config;
1158
1159 if (!ops->get_rxfh)
1160 return -EOPNOTSUPP;
1161
1162 if (ops->get_rxfh_indir_size)
1163 dev_indir_size = ops->get_rxfh_indir_size(dev);
1164 if (ops->get_rxfh_key_size)
1165 dev_key_size = ops->get_rxfh_key_size(dev);
1166
1167 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1168 return -EFAULT;
1169 user_indir_size = rxfh.indir_size;
1170 user_key_size = rxfh.key_size;
1171
1172 /* Check that reserved fields are 0 for now */
1173 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1174 return -EINVAL;
1175 /* Most drivers don't handle rss_context, check it's 0 as well */
1176 if (rxfh.rss_context && !ops->get_rxfh_context)
1177 return -EOPNOTSUPP;
1178
1179 rxfh.indir_size = dev_indir_size;
1180 rxfh.key_size = dev_key_size;
1181 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
1182 return -EFAULT;
1183
1184 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1185 (user_key_size && (user_key_size != dev_key_size)))
1186 return -EINVAL;
1187
1188 indir_bytes = user_indir_size * sizeof(indir[0]);
1189 total_size = indir_bytes + user_key_size;
1190 rss_config = kzalloc(total_size, GFP_USER);
1191 if (!rss_config)
1192 return -ENOMEM;
1193
1194 if (user_indir_size)
1195 indir = (u32 *)rss_config;
1196
1197 if (user_key_size)
1198 hkey = rss_config + indir_bytes;
1199
1200 if (rxfh.rss_context)
1201 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey,
1202 &dev_hfunc,
1203 rxfh.rss_context);
1204 else
1205 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1206 if (ret)
1207 goto out;
1208
1209 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1210 &dev_hfunc, sizeof(rxfh.hfunc))) {
1211 ret = -EFAULT;
1212 } else if (copy_to_user(useraddr +
1213 offsetof(struct ethtool_rxfh, rss_config[0]),
1214 rss_config, total_size)) {
1215 ret = -EFAULT;
1216 }
1217 out:
1218 kfree(rss_config);
1219
1220 return ret;
1221 }
1222
ethtool_set_rxfh(struct net_device * dev,void __user * useraddr)1223 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1224 void __user *useraddr)
1225 {
1226 int ret;
1227 const struct ethtool_ops *ops = dev->ethtool_ops;
1228 struct ethtool_rxnfc rx_rings;
1229 struct ethtool_rxfh rxfh;
1230 u32 dev_indir_size = 0, dev_key_size = 0, i;
1231 u32 *indir = NULL, indir_bytes = 0;
1232 u8 *hkey = NULL;
1233 u8 *rss_config;
1234 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1235 bool delete = false;
1236
1237 if (!ops->get_rxnfc || !ops->set_rxfh)
1238 return -EOPNOTSUPP;
1239
1240 if (ops->get_rxfh_indir_size)
1241 dev_indir_size = ops->get_rxfh_indir_size(dev);
1242 if (ops->get_rxfh_key_size)
1243 dev_key_size = ops->get_rxfh_key_size(dev);
1244
1245 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
1246 return -EFAULT;
1247
1248 /* Check that reserved fields are 0 for now */
1249 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32)
1250 return -EINVAL;
1251 /* Most drivers don't handle rss_context, check it's 0 as well */
1252 if (rxfh.rss_context && !ops->set_rxfh_context)
1253 return -EOPNOTSUPP;
1254
1255 /* If either indir, hash key or function is valid, proceed further.
1256 * Must request at least one change: indir size, hash key or function.
1257 */
1258 if ((rxfh.indir_size &&
1259 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1260 rxfh.indir_size != dev_indir_size) ||
1261 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1262 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
1263 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
1264 return -EINVAL;
1265
1266 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1267 indir_bytes = dev_indir_size * sizeof(indir[0]);
1268
1269 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
1270 if (!rss_config)
1271 return -ENOMEM;
1272
1273 rx_rings.cmd = ETHTOOL_GRXRINGS;
1274 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1275 if (ret)
1276 goto out;
1277
1278 /* rxfh.indir_size == 0 means reset the indir table to default (master
1279 * context) or delete the context (other RSS contexts).
1280 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
1281 */
1282 if (rxfh.indir_size &&
1283 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
1284 indir = (u32 *)rss_config;
1285 ret = ethtool_copy_validate_indir(indir,
1286 useraddr + rss_cfg_offset,
1287 &rx_rings,
1288 rxfh.indir_size);
1289 if (ret)
1290 goto out;
1291 } else if (rxfh.indir_size == 0) {
1292 if (rxfh.rss_context == 0) {
1293 indir = (u32 *)rss_config;
1294 for (i = 0; i < dev_indir_size; i++)
1295 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1296 } else {
1297 delete = true;
1298 }
1299 }
1300
1301 if (rxfh.key_size) {
1302 hkey = rss_config + indir_bytes;
1303 if (copy_from_user(hkey,
1304 useraddr + rss_cfg_offset + indir_bytes,
1305 rxfh.key_size)) {
1306 ret = -EFAULT;
1307 goto out;
1308 }
1309 }
1310
1311 if (rxfh.rss_context)
1312 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc,
1313 &rxfh.rss_context, delete);
1314 else
1315 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
1316 if (ret)
1317 goto out;
1318
1319 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context),
1320 &rxfh.rss_context, sizeof(rxfh.rss_context)))
1321 ret = -EFAULT;
1322
1323 if (!rxfh.rss_context) {
1324 /* indicate whether rxfh was set to default */
1325 if (rxfh.indir_size == 0)
1326 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1327 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1328 dev->priv_flags |= IFF_RXFH_CONFIGURED;
1329 }
1330
1331 out:
1332 kfree(rss_config);
1333 return ret;
1334 }
1335
ethtool_get_regs(struct net_device * dev,char __user * useraddr)1336 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1337 {
1338 struct ethtool_regs regs;
1339 const struct ethtool_ops *ops = dev->ethtool_ops;
1340 void *regbuf;
1341 int reglen, ret;
1342
1343 if (!ops->get_regs || !ops->get_regs_len)
1344 return -EOPNOTSUPP;
1345
1346 if (copy_from_user(®s, useraddr, sizeof(regs)))
1347 return -EFAULT;
1348
1349 reglen = ops->get_regs_len(dev);
1350 if (reglen <= 0)
1351 return reglen;
1352
1353 if (regs.len > reglen)
1354 regs.len = reglen;
1355
1356 regbuf = vzalloc(reglen);
1357 if (!regbuf)
1358 return -ENOMEM;
1359
1360 if (regs.len < reglen)
1361 reglen = regs.len;
1362
1363 ops->get_regs(dev, ®s, regbuf);
1364
1365 ret = -EFAULT;
1366 if (copy_to_user(useraddr, ®s, sizeof(regs)))
1367 goto out;
1368 useraddr += offsetof(struct ethtool_regs, data);
1369 if (copy_to_user(useraddr, regbuf, reglen))
1370 goto out;
1371 ret = 0;
1372
1373 out:
1374 vfree(regbuf);
1375 return ret;
1376 }
1377
ethtool_reset(struct net_device * dev,char __user * useraddr)1378 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1379 {
1380 struct ethtool_value reset;
1381 int ret;
1382
1383 if (!dev->ethtool_ops->reset)
1384 return -EOPNOTSUPP;
1385
1386 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1387 return -EFAULT;
1388
1389 ret = dev->ethtool_ops->reset(dev, &reset.data);
1390 if (ret)
1391 return ret;
1392
1393 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1394 return -EFAULT;
1395 return 0;
1396 }
1397
ethtool_get_wol(struct net_device * dev,char __user * useraddr)1398 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1399 {
1400 struct ethtool_wolinfo wol;
1401
1402 if (!dev->ethtool_ops->get_wol)
1403 return -EOPNOTSUPP;
1404
1405 memset(&wol, 0, sizeof(struct ethtool_wolinfo));
1406 wol.cmd = ETHTOOL_GWOL;
1407 dev->ethtool_ops->get_wol(dev, &wol);
1408
1409 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1410 return -EFAULT;
1411 return 0;
1412 }
1413
ethtool_set_wol(struct net_device * dev,char __user * useraddr)1414 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1415 {
1416 struct ethtool_wolinfo wol;
1417 int ret;
1418
1419 if (!dev->ethtool_ops->set_wol)
1420 return -EOPNOTSUPP;
1421
1422 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1423 return -EFAULT;
1424
1425 ret = dev->ethtool_ops->set_wol(dev, &wol);
1426 if (ret)
1427 return ret;
1428
1429 dev->wol_enabled = !!wol.wolopts;
1430
1431 return 0;
1432 }
1433
ethtool_get_eee(struct net_device * dev,char __user * useraddr)1434 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1435 {
1436 struct ethtool_eee edata;
1437 int rc;
1438
1439 if (!dev->ethtool_ops->get_eee)
1440 return -EOPNOTSUPP;
1441
1442 memset(&edata, 0, sizeof(struct ethtool_eee));
1443 edata.cmd = ETHTOOL_GEEE;
1444 rc = dev->ethtool_ops->get_eee(dev, &edata);
1445
1446 if (rc)
1447 return rc;
1448
1449 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1450 return -EFAULT;
1451
1452 return 0;
1453 }
1454
ethtool_set_eee(struct net_device * dev,char __user * useraddr)1455 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1456 {
1457 struct ethtool_eee edata;
1458
1459 if (!dev->ethtool_ops->set_eee)
1460 return -EOPNOTSUPP;
1461
1462 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1463 return -EFAULT;
1464
1465 return dev->ethtool_ops->set_eee(dev, &edata);
1466 }
1467
ethtool_nway_reset(struct net_device * dev)1468 static int ethtool_nway_reset(struct net_device *dev)
1469 {
1470 if (!dev->ethtool_ops->nway_reset)
1471 return -EOPNOTSUPP;
1472
1473 return dev->ethtool_ops->nway_reset(dev);
1474 }
1475
ethtool_get_link(struct net_device * dev,char __user * useraddr)1476 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1477 {
1478 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1479
1480 if (!dev->ethtool_ops->get_link)
1481 return -EOPNOTSUPP;
1482
1483 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1484
1485 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1486 return -EFAULT;
1487 return 0;
1488 }
1489
ethtool_get_any_eeprom(struct net_device * dev,void __user * useraddr,int (* getter)(struct net_device *,struct ethtool_eeprom *,u8 *),u32 total_len)1490 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1491 int (*getter)(struct net_device *,
1492 struct ethtool_eeprom *, u8 *),
1493 u32 total_len)
1494 {
1495 struct ethtool_eeprom eeprom;
1496 void __user *userbuf = useraddr + sizeof(eeprom);
1497 u32 bytes_remaining;
1498 u8 *data;
1499 int ret = 0;
1500
1501 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1502 return -EFAULT;
1503
1504 /* Check for wrap and zero */
1505 if (eeprom.offset + eeprom.len <= eeprom.offset)
1506 return -EINVAL;
1507
1508 /* Check for exceeding total eeprom len */
1509 if (eeprom.offset + eeprom.len > total_len)
1510 return -EINVAL;
1511
1512 data = kzalloc(PAGE_SIZE, GFP_USER);
1513 if (!data)
1514 return -ENOMEM;
1515
1516 bytes_remaining = eeprom.len;
1517 while (bytes_remaining > 0) {
1518 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1519
1520 ret = getter(dev, &eeprom, data);
1521 if (ret)
1522 break;
1523 if (copy_to_user(userbuf, data, eeprom.len)) {
1524 ret = -EFAULT;
1525 break;
1526 }
1527 userbuf += eeprom.len;
1528 eeprom.offset += eeprom.len;
1529 bytes_remaining -= eeprom.len;
1530 }
1531
1532 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1533 eeprom.offset -= eeprom.len;
1534 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1535 ret = -EFAULT;
1536
1537 kfree(data);
1538 return ret;
1539 }
1540
ethtool_get_eeprom(struct net_device * dev,void __user * useraddr)1541 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1542 {
1543 const struct ethtool_ops *ops = dev->ethtool_ops;
1544
1545 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1546 !ops->get_eeprom_len(dev))
1547 return -EOPNOTSUPP;
1548
1549 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1550 ops->get_eeprom_len(dev));
1551 }
1552
ethtool_set_eeprom(struct net_device * dev,void __user * useraddr)1553 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1554 {
1555 struct ethtool_eeprom eeprom;
1556 const struct ethtool_ops *ops = dev->ethtool_ops;
1557 void __user *userbuf = useraddr + sizeof(eeprom);
1558 u32 bytes_remaining;
1559 u8 *data;
1560 int ret = 0;
1561
1562 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1563 !ops->get_eeprom_len(dev))
1564 return -EOPNOTSUPP;
1565
1566 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1567 return -EFAULT;
1568
1569 /* Check for wrap and zero */
1570 if (eeprom.offset + eeprom.len <= eeprom.offset)
1571 return -EINVAL;
1572
1573 /* Check for exceeding total eeprom len */
1574 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1575 return -EINVAL;
1576
1577 data = kzalloc(PAGE_SIZE, GFP_USER);
1578 if (!data)
1579 return -ENOMEM;
1580
1581 bytes_remaining = eeprom.len;
1582 while (bytes_remaining > 0) {
1583 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1584
1585 if (copy_from_user(data, userbuf, eeprom.len)) {
1586 ret = -EFAULT;
1587 break;
1588 }
1589 ret = ops->set_eeprom(dev, &eeprom, data);
1590 if (ret)
1591 break;
1592 userbuf += eeprom.len;
1593 eeprom.offset += eeprom.len;
1594 bytes_remaining -= eeprom.len;
1595 }
1596
1597 kfree(data);
1598 return ret;
1599 }
1600
ethtool_get_coalesce(struct net_device * dev,void __user * useraddr)1601 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1602 void __user *useraddr)
1603 {
1604 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1605
1606 if (!dev->ethtool_ops->get_coalesce)
1607 return -EOPNOTSUPP;
1608
1609 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1610
1611 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1612 return -EFAULT;
1613 return 0;
1614 }
1615
ethtool_set_coalesce(struct net_device * dev,void __user * useraddr)1616 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1617 void __user *useraddr)
1618 {
1619 struct ethtool_coalesce coalesce;
1620
1621 if (!dev->ethtool_ops->set_coalesce)
1622 return -EOPNOTSUPP;
1623
1624 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1625 return -EFAULT;
1626
1627 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1628 }
1629
ethtool_get_ringparam(struct net_device * dev,void __user * useraddr)1630 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1631 {
1632 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1633
1634 if (!dev->ethtool_ops->get_ringparam)
1635 return -EOPNOTSUPP;
1636
1637 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1638
1639 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1640 return -EFAULT;
1641 return 0;
1642 }
1643
ethtool_set_ringparam(struct net_device * dev,void __user * useraddr)1644 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1645 {
1646 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
1647
1648 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
1649 return -EOPNOTSUPP;
1650
1651 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1652 return -EFAULT;
1653
1654 dev->ethtool_ops->get_ringparam(dev, &max);
1655
1656 /* ensure new ring parameters are within the maximums */
1657 if (ringparam.rx_pending > max.rx_max_pending ||
1658 ringparam.rx_mini_pending > max.rx_mini_max_pending ||
1659 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending ||
1660 ringparam.tx_pending > max.tx_max_pending)
1661 return -EINVAL;
1662
1663 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1664 }
1665
ethtool_get_channels(struct net_device * dev,void __user * useraddr)1666 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1667 void __user *useraddr)
1668 {
1669 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1670
1671 if (!dev->ethtool_ops->get_channels)
1672 return -EOPNOTSUPP;
1673
1674 dev->ethtool_ops->get_channels(dev, &channels);
1675
1676 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1677 return -EFAULT;
1678 return 0;
1679 }
1680
ethtool_set_channels(struct net_device * dev,void __user * useraddr)1681 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1682 void __user *useraddr)
1683 {
1684 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS };
1685 u16 from_channel, to_channel;
1686 u32 max_rx_in_use = 0;
1687 unsigned int i;
1688
1689 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
1690 return -EOPNOTSUPP;
1691
1692 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1693 return -EFAULT;
1694
1695 dev->ethtool_ops->get_channels(dev, &curr);
1696
1697 /* ensure new counts are within the maximums */
1698 if (channels.rx_count > curr.max_rx ||
1699 channels.tx_count > curr.max_tx ||
1700 channels.combined_count > curr.max_combined ||
1701 channels.other_count > curr.max_other)
1702 return -EINVAL;
1703
1704 /* ensure the new Rx count fits within the configured Rx flow
1705 * indirection table settings */
1706 if (netif_is_rxfh_configured(dev) &&
1707 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1708 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1709 return -EINVAL;
1710
1711 /* Disabling channels, query zero-copy AF_XDP sockets */
1712 from_channel = channels.combined_count +
1713 min(channels.rx_count, channels.tx_count);
1714 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count);
1715 for (i = from_channel; i < to_channel; i++)
1716 if (xdp_get_umem_from_qid(dev, i))
1717 return -EINVAL;
1718
1719 return dev->ethtool_ops->set_channels(dev, &channels);
1720 }
1721
ethtool_get_pauseparam(struct net_device * dev,void __user * useraddr)1722 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1723 {
1724 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM };
1725
1726 if (!dev->ethtool_ops->get_pauseparam)
1727 return -EOPNOTSUPP;
1728
1729 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1730
1731 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1732 return -EFAULT;
1733 return 0;
1734 }
1735
ethtool_set_pauseparam(struct net_device * dev,void __user * useraddr)1736 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1737 {
1738 struct ethtool_pauseparam pauseparam;
1739
1740 if (!dev->ethtool_ops->set_pauseparam)
1741 return -EOPNOTSUPP;
1742
1743 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1744 return -EFAULT;
1745
1746 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1747 }
1748
ethtool_self_test(struct net_device * dev,char __user * useraddr)1749 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1750 {
1751 struct ethtool_test test;
1752 const struct ethtool_ops *ops = dev->ethtool_ops;
1753 u64 *data;
1754 int ret, test_len;
1755
1756 if (!ops->self_test || !ops->get_sset_count)
1757 return -EOPNOTSUPP;
1758
1759 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1760 if (test_len < 0)
1761 return test_len;
1762 WARN_ON(test_len == 0);
1763
1764 if (copy_from_user(&test, useraddr, sizeof(test)))
1765 return -EFAULT;
1766
1767 test.len = test_len;
1768 data = kcalloc(test_len, sizeof(u64), GFP_USER);
1769 if (!data)
1770 return -ENOMEM;
1771
1772 ops->self_test(dev, &test, data);
1773
1774 ret = -EFAULT;
1775 if (copy_to_user(useraddr, &test, sizeof(test)))
1776 goto out;
1777 useraddr += sizeof(test);
1778 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1779 goto out;
1780 ret = 0;
1781
1782 out:
1783 kfree(data);
1784 return ret;
1785 }
1786
ethtool_get_strings(struct net_device * dev,void __user * useraddr)1787 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1788 {
1789 struct ethtool_gstrings gstrings;
1790 u8 *data;
1791 int ret;
1792
1793 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1794 return -EFAULT;
1795
1796 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1797 if (ret < 0)
1798 return ret;
1799 if (ret > S32_MAX / ETH_GSTRING_LEN)
1800 return -ENOMEM;
1801 WARN_ON_ONCE(!ret);
1802
1803 gstrings.len = ret;
1804
1805 if (gstrings.len) {
1806 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN));
1807 if (!data)
1808 return -ENOMEM;
1809
1810 __ethtool_get_strings(dev, gstrings.string_set, data);
1811 } else {
1812 data = NULL;
1813 }
1814
1815 ret = -EFAULT;
1816 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1817 goto out;
1818 useraddr += sizeof(gstrings);
1819 if (gstrings.len &&
1820 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1821 goto out;
1822 ret = 0;
1823
1824 out:
1825 vfree(data);
1826 return ret;
1827 }
1828
ethtool_phys_id(struct net_device * dev,void __user * useraddr)1829 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1830 {
1831 struct ethtool_value id;
1832 static bool busy;
1833 const struct ethtool_ops *ops = dev->ethtool_ops;
1834 int rc;
1835
1836 if (!ops->set_phys_id)
1837 return -EOPNOTSUPP;
1838
1839 if (busy)
1840 return -EBUSY;
1841
1842 if (copy_from_user(&id, useraddr, sizeof(id)))
1843 return -EFAULT;
1844
1845 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1846 if (rc < 0)
1847 return rc;
1848
1849 /* Drop the RTNL lock while waiting, but prevent reentry or
1850 * removal of the device.
1851 */
1852 busy = true;
1853 dev_hold(dev);
1854 rtnl_unlock();
1855
1856 if (rc == 0) {
1857 /* Driver will handle this itself */
1858 schedule_timeout_interruptible(
1859 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1860 } else {
1861 /* Driver expects to be called at twice the frequency in rc */
1862 int n = rc * 2, i, interval = HZ / n;
1863
1864 /* Count down seconds */
1865 do {
1866 /* Count down iterations per second */
1867 i = n;
1868 do {
1869 rtnl_lock();
1870 rc = ops->set_phys_id(dev,
1871 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1872 rtnl_unlock();
1873 if (rc)
1874 break;
1875 schedule_timeout_interruptible(interval);
1876 } while (!signal_pending(current) && --i != 0);
1877 } while (!signal_pending(current) &&
1878 (id.data == 0 || --id.data != 0));
1879 }
1880
1881 rtnl_lock();
1882 dev_put(dev);
1883 busy = false;
1884
1885 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1886 return rc;
1887 }
1888
ethtool_get_stats(struct net_device * dev,void __user * useraddr)1889 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1890 {
1891 struct ethtool_stats stats;
1892 const struct ethtool_ops *ops = dev->ethtool_ops;
1893 u64 *data;
1894 int ret, n_stats;
1895
1896 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1897 return -EOPNOTSUPP;
1898
1899 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1900 if (n_stats < 0)
1901 return n_stats;
1902 if (n_stats > S32_MAX / sizeof(u64))
1903 return -ENOMEM;
1904 WARN_ON_ONCE(!n_stats);
1905 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1906 return -EFAULT;
1907
1908 stats.n_stats = n_stats;
1909
1910 if (n_stats) {
1911 data = vzalloc(array_size(n_stats, sizeof(u64)));
1912 if (!data)
1913 return -ENOMEM;
1914 ops->get_ethtool_stats(dev, &stats, data);
1915 } else {
1916 data = NULL;
1917 }
1918
1919 ret = -EFAULT;
1920 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1921 goto out;
1922 useraddr += sizeof(stats);
1923 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1924 goto out;
1925 ret = 0;
1926
1927 out:
1928 vfree(data);
1929 return ret;
1930 }
1931
ethtool_get_phy_stats(struct net_device * dev,void __user * useraddr)1932 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1933 {
1934 const struct ethtool_ops *ops = dev->ethtool_ops;
1935 struct phy_device *phydev = dev->phydev;
1936 struct ethtool_stats stats;
1937 u64 *data;
1938 int ret, n_stats;
1939
1940 if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count))
1941 return -EOPNOTSUPP;
1942
1943 if (dev->phydev && !ops->get_ethtool_phy_stats)
1944 n_stats = phy_ethtool_get_sset_count(dev->phydev);
1945 else
1946 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS);
1947 if (n_stats < 0)
1948 return n_stats;
1949 if (n_stats > S32_MAX / sizeof(u64))
1950 return -ENOMEM;
1951 if (WARN_ON_ONCE(!n_stats))
1952 return -EOPNOTSUPP;
1953
1954 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1955 return -EFAULT;
1956
1957 stats.n_stats = n_stats;
1958
1959 if (n_stats) {
1960 data = vzalloc(array_size(n_stats, sizeof(u64)));
1961 if (!data)
1962 return -ENOMEM;
1963
1964 if (dev->phydev && !ops->get_ethtool_phy_stats) {
1965 ret = phy_ethtool_get_stats(dev->phydev, &stats, data);
1966 if (ret < 0)
1967 goto out;
1968 } else {
1969 ops->get_ethtool_phy_stats(dev, &stats, data);
1970 }
1971 } else {
1972 data = NULL;
1973 }
1974
1975 ret = -EFAULT;
1976 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1977 goto out;
1978 useraddr += sizeof(stats);
1979 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64)))
1980 goto out;
1981 ret = 0;
1982
1983 out:
1984 vfree(data);
1985 return ret;
1986 }
1987
ethtool_get_perm_addr(struct net_device * dev,void __user * useraddr)1988 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1989 {
1990 struct ethtool_perm_addr epaddr;
1991
1992 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1993 return -EFAULT;
1994
1995 if (epaddr.size < dev->addr_len)
1996 return -ETOOSMALL;
1997 epaddr.size = dev->addr_len;
1998
1999 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
2000 return -EFAULT;
2001 useraddr += sizeof(epaddr);
2002 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
2003 return -EFAULT;
2004 return 0;
2005 }
2006
ethtool_get_value(struct net_device * dev,char __user * useraddr,u32 cmd,u32 (* actor)(struct net_device *))2007 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
2008 u32 cmd, u32 (*actor)(struct net_device *))
2009 {
2010 struct ethtool_value edata = { .cmd = cmd };
2011
2012 if (!actor)
2013 return -EOPNOTSUPP;
2014
2015 edata.data = actor(dev);
2016
2017 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2018 return -EFAULT;
2019 return 0;
2020 }
2021
ethtool_set_value_void(struct net_device * dev,char __user * useraddr,void (* actor)(struct net_device *,u32))2022 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2023 void (*actor)(struct net_device *, u32))
2024 {
2025 struct ethtool_value edata;
2026
2027 if (!actor)
2028 return -EOPNOTSUPP;
2029
2030 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2031 return -EFAULT;
2032
2033 actor(dev, edata.data);
2034 return 0;
2035 }
2036
ethtool_set_value(struct net_device * dev,char __user * useraddr,int (* actor)(struct net_device *,u32))2037 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2038 int (*actor)(struct net_device *, u32))
2039 {
2040 struct ethtool_value edata;
2041
2042 if (!actor)
2043 return -EOPNOTSUPP;
2044
2045 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2046 return -EFAULT;
2047
2048 return actor(dev, edata.data);
2049 }
2050
ethtool_flash_device(struct net_device * dev,char __user * useraddr)2051 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2052 char __user *useraddr)
2053 {
2054 struct ethtool_flash efl;
2055
2056 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2057 return -EFAULT;
2058 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2059
2060 if (!dev->ethtool_ops->flash_device)
2061 return devlink_compat_flash_update(dev, efl.data);
2062
2063 return dev->ethtool_ops->flash_device(dev, &efl);
2064 }
2065
ethtool_set_dump(struct net_device * dev,void __user * useraddr)2066 static int ethtool_set_dump(struct net_device *dev,
2067 void __user *useraddr)
2068 {
2069 struct ethtool_dump dump;
2070
2071 if (!dev->ethtool_ops->set_dump)
2072 return -EOPNOTSUPP;
2073
2074 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2075 return -EFAULT;
2076
2077 return dev->ethtool_ops->set_dump(dev, &dump);
2078 }
2079
ethtool_get_dump_flag(struct net_device * dev,void __user * useraddr)2080 static int ethtool_get_dump_flag(struct net_device *dev,
2081 void __user *useraddr)
2082 {
2083 int ret;
2084 struct ethtool_dump dump;
2085 const struct ethtool_ops *ops = dev->ethtool_ops;
2086
2087 if (!ops->get_dump_flag)
2088 return -EOPNOTSUPP;
2089
2090 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2091 return -EFAULT;
2092
2093 ret = ops->get_dump_flag(dev, &dump);
2094 if (ret)
2095 return ret;
2096
2097 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2098 return -EFAULT;
2099 return 0;
2100 }
2101
ethtool_get_dump_data(struct net_device * dev,void __user * useraddr)2102 static int ethtool_get_dump_data(struct net_device *dev,
2103 void __user *useraddr)
2104 {
2105 int ret;
2106 __u32 len;
2107 struct ethtool_dump dump, tmp;
2108 const struct ethtool_ops *ops = dev->ethtool_ops;
2109 void *data = NULL;
2110
2111 if (!ops->get_dump_data || !ops->get_dump_flag)
2112 return -EOPNOTSUPP;
2113
2114 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2115 return -EFAULT;
2116
2117 memset(&tmp, 0, sizeof(tmp));
2118 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2119 ret = ops->get_dump_flag(dev, &tmp);
2120 if (ret)
2121 return ret;
2122
2123 len = min(tmp.len, dump.len);
2124 if (!len)
2125 return -EFAULT;
2126
2127 /* Don't ever let the driver think there's more space available
2128 * than it requested with .get_dump_flag().
2129 */
2130 dump.len = len;
2131
2132 /* Always allocate enough space to hold the whole thing so that the
2133 * driver does not need to check the length and bother with partial
2134 * dumping.
2135 */
2136 data = vzalloc(tmp.len);
2137 if (!data)
2138 return -ENOMEM;
2139 ret = ops->get_dump_data(dev, &dump, data);
2140 if (ret)
2141 goto out;
2142
2143 /* There are two sane possibilities:
2144 * 1. The driver's .get_dump_data() does not touch dump.len.
2145 * 2. Or it may set dump.len to how much it really writes, which
2146 * should be tmp.len (or len if it can do a partial dump).
2147 * In any case respond to userspace with the actual length of data
2148 * it's receiving.
2149 */
2150 WARN_ON(dump.len != len && dump.len != tmp.len);
2151 dump.len = len;
2152
2153 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2154 ret = -EFAULT;
2155 goto out;
2156 }
2157 useraddr += offsetof(struct ethtool_dump, data);
2158 if (copy_to_user(useraddr, data, len))
2159 ret = -EFAULT;
2160 out:
2161 vfree(data);
2162 return ret;
2163 }
2164
ethtool_get_ts_info(struct net_device * dev,void __user * useraddr)2165 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2166 {
2167 int err = 0;
2168 struct ethtool_ts_info info;
2169 const struct ethtool_ops *ops = dev->ethtool_ops;
2170 struct phy_device *phydev = dev->phydev;
2171
2172 memset(&info, 0, sizeof(info));
2173 info.cmd = ETHTOOL_GET_TS_INFO;
2174
2175 if (phydev && phydev->drv && phydev->drv->ts_info) {
2176 err = phydev->drv->ts_info(phydev, &info);
2177 } else if (ops->get_ts_info) {
2178 err = ops->get_ts_info(dev, &info);
2179 } else {
2180 info.so_timestamping =
2181 SOF_TIMESTAMPING_RX_SOFTWARE |
2182 SOF_TIMESTAMPING_SOFTWARE;
2183 info.phc_index = -1;
2184 }
2185
2186 if (err)
2187 return err;
2188
2189 if (copy_to_user(useraddr, &info, sizeof(info)))
2190 err = -EFAULT;
2191
2192 return err;
2193 }
2194
__ethtool_get_module_info(struct net_device * dev,struct ethtool_modinfo * modinfo)2195 static int __ethtool_get_module_info(struct net_device *dev,
2196 struct ethtool_modinfo *modinfo)
2197 {
2198 const struct ethtool_ops *ops = dev->ethtool_ops;
2199 struct phy_device *phydev = dev->phydev;
2200
2201 if (dev->sfp_bus)
2202 return sfp_get_module_info(dev->sfp_bus, modinfo);
2203
2204 if (phydev && phydev->drv && phydev->drv->module_info)
2205 return phydev->drv->module_info(phydev, modinfo);
2206
2207 if (ops->get_module_info)
2208 return ops->get_module_info(dev, modinfo);
2209
2210 return -EOPNOTSUPP;
2211 }
2212
ethtool_get_module_info(struct net_device * dev,void __user * useraddr)2213 static int ethtool_get_module_info(struct net_device *dev,
2214 void __user *useraddr)
2215 {
2216 int ret;
2217 struct ethtool_modinfo modinfo;
2218
2219 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2220 return -EFAULT;
2221
2222 ret = __ethtool_get_module_info(dev, &modinfo);
2223 if (ret)
2224 return ret;
2225
2226 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2227 return -EFAULT;
2228
2229 return 0;
2230 }
2231
__ethtool_get_module_eeprom(struct net_device * dev,struct ethtool_eeprom * ee,u8 * data)2232 static int __ethtool_get_module_eeprom(struct net_device *dev,
2233 struct ethtool_eeprom *ee, u8 *data)
2234 {
2235 const struct ethtool_ops *ops = dev->ethtool_ops;
2236 struct phy_device *phydev = dev->phydev;
2237
2238 if (dev->sfp_bus)
2239 return sfp_get_module_eeprom(dev->sfp_bus, ee, data);
2240
2241 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2242 return phydev->drv->module_eeprom(phydev, ee, data);
2243
2244 if (ops->get_module_eeprom)
2245 return ops->get_module_eeprom(dev, ee, data);
2246
2247 return -EOPNOTSUPP;
2248 }
2249
ethtool_get_module_eeprom(struct net_device * dev,void __user * useraddr)2250 static int ethtool_get_module_eeprom(struct net_device *dev,
2251 void __user *useraddr)
2252 {
2253 int ret;
2254 struct ethtool_modinfo modinfo;
2255
2256 ret = __ethtool_get_module_info(dev, &modinfo);
2257 if (ret)
2258 return ret;
2259
2260 return ethtool_get_any_eeprom(dev, useraddr,
2261 __ethtool_get_module_eeprom,
2262 modinfo.eeprom_len);
2263 }
2264
ethtool_tunable_valid(const struct ethtool_tunable * tuna)2265 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2266 {
2267 switch (tuna->id) {
2268 case ETHTOOL_RX_COPYBREAK:
2269 case ETHTOOL_TX_COPYBREAK:
2270 if (tuna->len != sizeof(u32) ||
2271 tuna->type_id != ETHTOOL_TUNABLE_U32)
2272 return -EINVAL;
2273 break;
2274 case ETHTOOL_PFC_PREVENTION_TOUT:
2275 if (tuna->len != sizeof(u16) ||
2276 tuna->type_id != ETHTOOL_TUNABLE_U16)
2277 return -EINVAL;
2278 break;
2279 default:
2280 return -EINVAL;
2281 }
2282
2283 return 0;
2284 }
2285
ethtool_get_tunable(struct net_device * dev,void __user * useraddr)2286 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2287 {
2288 int ret;
2289 struct ethtool_tunable tuna;
2290 const struct ethtool_ops *ops = dev->ethtool_ops;
2291 void *data;
2292
2293 if (!ops->get_tunable)
2294 return -EOPNOTSUPP;
2295 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2296 return -EFAULT;
2297 ret = ethtool_tunable_valid(&tuna);
2298 if (ret)
2299 return ret;
2300 data = kzalloc(tuna.len, GFP_USER);
2301 if (!data)
2302 return -ENOMEM;
2303 ret = ops->get_tunable(dev, &tuna, data);
2304 if (ret)
2305 goto out;
2306 useraddr += sizeof(tuna);
2307 ret = -EFAULT;
2308 if (copy_to_user(useraddr, data, tuna.len))
2309 goto out;
2310 ret = 0;
2311
2312 out:
2313 kfree(data);
2314 return ret;
2315 }
2316
ethtool_set_tunable(struct net_device * dev,void __user * useraddr)2317 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2318 {
2319 int ret;
2320 struct ethtool_tunable tuna;
2321 const struct ethtool_ops *ops = dev->ethtool_ops;
2322 void *data;
2323
2324 if (!ops->set_tunable)
2325 return -EOPNOTSUPP;
2326 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2327 return -EFAULT;
2328 ret = ethtool_tunable_valid(&tuna);
2329 if (ret)
2330 return ret;
2331 useraddr += sizeof(tuna);
2332 data = memdup_user(useraddr, tuna.len);
2333 if (IS_ERR(data))
2334 return PTR_ERR(data);
2335 ret = ops->set_tunable(dev, &tuna, data);
2336
2337 kfree(data);
2338 return ret;
2339 }
2340
2341 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)2342 ethtool_get_per_queue_coalesce(struct net_device *dev,
2343 void __user *useraddr,
2344 struct ethtool_per_queue_op *per_queue_opt)
2345 {
2346 u32 bit;
2347 int ret;
2348 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2349
2350 if (!dev->ethtool_ops->get_per_queue_coalesce)
2351 return -EOPNOTSUPP;
2352
2353 useraddr += sizeof(*per_queue_opt);
2354
2355 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask,
2356 MAX_NUM_QUEUE);
2357
2358 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2359 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2360
2361 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2362 if (ret != 0)
2363 return ret;
2364 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2365 return -EFAULT;
2366 useraddr += sizeof(coalesce);
2367 }
2368
2369 return 0;
2370 }
2371
2372 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)2373 ethtool_set_per_queue_coalesce(struct net_device *dev,
2374 void __user *useraddr,
2375 struct ethtool_per_queue_op *per_queue_opt)
2376 {
2377 u32 bit;
2378 int i, ret = 0;
2379 int n_queue;
2380 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2381 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2382
2383 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2384 (!dev->ethtool_ops->get_per_queue_coalesce))
2385 return -EOPNOTSUPP;
2386
2387 useraddr += sizeof(*per_queue_opt);
2388
2389 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE);
2390 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2391 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2392 if (!backup)
2393 return -ENOMEM;
2394
2395 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2396 struct ethtool_coalesce coalesce;
2397
2398 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2399 if (ret != 0)
2400 goto roll_back;
2401
2402 tmp++;
2403
2404 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2405 ret = -EFAULT;
2406 goto roll_back;
2407 }
2408
2409 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2410 if (ret != 0)
2411 goto roll_back;
2412
2413 useraddr += sizeof(coalesce);
2414 }
2415
2416 roll_back:
2417 if (ret != 0) {
2418 tmp = backup;
2419 for_each_set_bit(i, queue_mask, bit) {
2420 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2421 tmp++;
2422 }
2423 }
2424 kfree(backup);
2425
2426 return ret;
2427 }
2428
ethtool_set_per_queue(struct net_device * dev,void __user * useraddr,u32 sub_cmd)2429 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev,
2430 void __user *useraddr, u32 sub_cmd)
2431 {
2432 struct ethtool_per_queue_op per_queue_opt;
2433
2434 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2435 return -EFAULT;
2436
2437 if (per_queue_opt.sub_command != sub_cmd)
2438 return -EINVAL;
2439
2440 switch (per_queue_opt.sub_command) {
2441 case ETHTOOL_GCOALESCE:
2442 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2443 case ETHTOOL_SCOALESCE:
2444 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
2445 default:
2446 return -EOPNOTSUPP;
2447 };
2448 }
2449
ethtool_phy_tunable_valid(const struct ethtool_tunable * tuna)2450 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna)
2451 {
2452 switch (tuna->id) {
2453 case ETHTOOL_PHY_DOWNSHIFT:
2454 case ETHTOOL_PHY_FAST_LINK_DOWN:
2455 if (tuna->len != sizeof(u8) ||
2456 tuna->type_id != ETHTOOL_TUNABLE_U8)
2457 return -EINVAL;
2458 break;
2459 case ETHTOOL_PHY_EDPD:
2460 if (tuna->len != sizeof(u16) ||
2461 tuna->type_id != ETHTOOL_TUNABLE_U16)
2462 return -EINVAL;
2463 break;
2464 default:
2465 return -EINVAL;
2466 }
2467
2468 return 0;
2469 }
2470
get_phy_tunable(struct net_device * dev,void __user * useraddr)2471 static int get_phy_tunable(struct net_device *dev, void __user *useraddr)
2472 {
2473 int ret;
2474 struct ethtool_tunable tuna;
2475 struct phy_device *phydev = dev->phydev;
2476 void *data;
2477
2478 if (!(phydev && phydev->drv && phydev->drv->get_tunable))
2479 return -EOPNOTSUPP;
2480
2481 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2482 return -EFAULT;
2483 ret = ethtool_phy_tunable_valid(&tuna);
2484 if (ret)
2485 return ret;
2486 data = kzalloc(tuna.len, GFP_USER);
2487 if (!data)
2488 return -ENOMEM;
2489 mutex_lock(&phydev->lock);
2490 ret = phydev->drv->get_tunable(phydev, &tuna, data);
2491 mutex_unlock(&phydev->lock);
2492 if (ret)
2493 goto out;
2494 useraddr += sizeof(tuna);
2495 ret = -EFAULT;
2496 if (copy_to_user(useraddr, data, tuna.len))
2497 goto out;
2498 ret = 0;
2499
2500 out:
2501 kfree(data);
2502 return ret;
2503 }
2504
set_phy_tunable(struct net_device * dev,void __user * useraddr)2505 static int set_phy_tunable(struct net_device *dev, void __user *useraddr)
2506 {
2507 int ret;
2508 struct ethtool_tunable tuna;
2509 struct phy_device *phydev = dev->phydev;
2510 void *data;
2511
2512 if (!(phydev && phydev->drv && phydev->drv->set_tunable))
2513 return -EOPNOTSUPP;
2514 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2515 return -EFAULT;
2516 ret = ethtool_phy_tunable_valid(&tuna);
2517 if (ret)
2518 return ret;
2519 useraddr += sizeof(tuna);
2520 data = memdup_user(useraddr, tuna.len);
2521 if (IS_ERR(data))
2522 return PTR_ERR(data);
2523 mutex_lock(&phydev->lock);
2524 ret = phydev->drv->set_tunable(phydev, &tuna, data);
2525 mutex_unlock(&phydev->lock);
2526
2527 kfree(data);
2528 return ret;
2529 }
2530
ethtool_get_fecparam(struct net_device * dev,void __user * useraddr)2531 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
2532 {
2533 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM };
2534 int rc;
2535
2536 if (!dev->ethtool_ops->get_fecparam)
2537 return -EOPNOTSUPP;
2538
2539 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam);
2540 if (rc)
2541 return rc;
2542
2543 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
2544 return -EFAULT;
2545 return 0;
2546 }
2547
ethtool_set_fecparam(struct net_device * dev,void __user * useraddr)2548 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
2549 {
2550 struct ethtool_fecparam fecparam;
2551
2552 if (!dev->ethtool_ops->set_fecparam)
2553 return -EOPNOTSUPP;
2554
2555 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
2556 return -EFAULT;
2557
2558 return dev->ethtool_ops->set_fecparam(dev, &fecparam);
2559 }
2560
2561 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
2562
dev_ethtool(struct net * net,struct ifreq * ifr)2563 int dev_ethtool(struct net *net, struct ifreq *ifr)
2564 {
2565 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
2566 void __user *useraddr = ifr->ifr_data;
2567 u32 ethcmd, sub_cmd;
2568 int rc;
2569 netdev_features_t old_features;
2570
2571 if (!dev || !netif_device_present(dev))
2572 return -ENODEV;
2573
2574 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
2575 return -EFAULT;
2576
2577 if (ethcmd == ETHTOOL_PERQUEUE) {
2578 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2579 return -EFAULT;
2580 } else {
2581 sub_cmd = ethcmd;
2582 }
2583 /* Allow some commands to be done by anyone */
2584 switch (sub_cmd) {
2585 case ETHTOOL_GSET:
2586 case ETHTOOL_GDRVINFO:
2587 case ETHTOOL_GMSGLVL:
2588 case ETHTOOL_GLINK:
2589 case ETHTOOL_GCOALESCE:
2590 case ETHTOOL_GRINGPARAM:
2591 case ETHTOOL_GPAUSEPARAM:
2592 case ETHTOOL_GRXCSUM:
2593 case ETHTOOL_GTXCSUM:
2594 case ETHTOOL_GSG:
2595 case ETHTOOL_GSSET_INFO:
2596 case ETHTOOL_GSTRINGS:
2597 case ETHTOOL_GSTATS:
2598 case ETHTOOL_GPHYSTATS:
2599 case ETHTOOL_GTSO:
2600 case ETHTOOL_GPERMADDR:
2601 case ETHTOOL_GUFO:
2602 case ETHTOOL_GGSO:
2603 case ETHTOOL_GGRO:
2604 case ETHTOOL_GFLAGS:
2605 case ETHTOOL_GPFLAGS:
2606 case ETHTOOL_GRXFH:
2607 case ETHTOOL_GRXRINGS:
2608 case ETHTOOL_GRXCLSRLCNT:
2609 case ETHTOOL_GRXCLSRULE:
2610 case ETHTOOL_GRXCLSRLALL:
2611 case ETHTOOL_GRXFHINDIR:
2612 case ETHTOOL_GRSSH:
2613 case ETHTOOL_GFEATURES:
2614 case ETHTOOL_GCHANNELS:
2615 case ETHTOOL_GET_TS_INFO:
2616 case ETHTOOL_GEEE:
2617 case ETHTOOL_GTUNABLE:
2618 case ETHTOOL_PHY_GTUNABLE:
2619 case ETHTOOL_GLINKSETTINGS:
2620 case ETHTOOL_GFECPARAM:
2621 break;
2622 default:
2623 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2624 return -EPERM;
2625 }
2626
2627 if (dev->ethtool_ops->begin) {
2628 rc = dev->ethtool_ops->begin(dev);
2629 if (rc < 0)
2630 return rc;
2631 }
2632 old_features = dev->features;
2633
2634 switch (ethcmd) {
2635 case ETHTOOL_GSET:
2636 rc = ethtool_get_settings(dev, useraddr);
2637 break;
2638 case ETHTOOL_SSET:
2639 rc = ethtool_set_settings(dev, useraddr);
2640 break;
2641 case ETHTOOL_GDRVINFO:
2642 rc = ethtool_get_drvinfo(dev, useraddr);
2643 break;
2644 case ETHTOOL_GREGS:
2645 rc = ethtool_get_regs(dev, useraddr);
2646 break;
2647 case ETHTOOL_GWOL:
2648 rc = ethtool_get_wol(dev, useraddr);
2649 break;
2650 case ETHTOOL_SWOL:
2651 rc = ethtool_set_wol(dev, useraddr);
2652 break;
2653 case ETHTOOL_GMSGLVL:
2654 rc = ethtool_get_value(dev, useraddr, ethcmd,
2655 dev->ethtool_ops->get_msglevel);
2656 break;
2657 case ETHTOOL_SMSGLVL:
2658 rc = ethtool_set_value_void(dev, useraddr,
2659 dev->ethtool_ops->set_msglevel);
2660 break;
2661 case ETHTOOL_GEEE:
2662 rc = ethtool_get_eee(dev, useraddr);
2663 break;
2664 case ETHTOOL_SEEE:
2665 rc = ethtool_set_eee(dev, useraddr);
2666 break;
2667 case ETHTOOL_NWAY_RST:
2668 rc = ethtool_nway_reset(dev);
2669 break;
2670 case ETHTOOL_GLINK:
2671 rc = ethtool_get_link(dev, useraddr);
2672 break;
2673 case ETHTOOL_GEEPROM:
2674 rc = ethtool_get_eeprom(dev, useraddr);
2675 break;
2676 case ETHTOOL_SEEPROM:
2677 rc = ethtool_set_eeprom(dev, useraddr);
2678 break;
2679 case ETHTOOL_GCOALESCE:
2680 rc = ethtool_get_coalesce(dev, useraddr);
2681 break;
2682 case ETHTOOL_SCOALESCE:
2683 rc = ethtool_set_coalesce(dev, useraddr);
2684 break;
2685 case ETHTOOL_GRINGPARAM:
2686 rc = ethtool_get_ringparam(dev, useraddr);
2687 break;
2688 case ETHTOOL_SRINGPARAM:
2689 rc = ethtool_set_ringparam(dev, useraddr);
2690 break;
2691 case ETHTOOL_GPAUSEPARAM:
2692 rc = ethtool_get_pauseparam(dev, useraddr);
2693 break;
2694 case ETHTOOL_SPAUSEPARAM:
2695 rc = ethtool_set_pauseparam(dev, useraddr);
2696 break;
2697 case ETHTOOL_TEST:
2698 rc = ethtool_self_test(dev, useraddr);
2699 break;
2700 case ETHTOOL_GSTRINGS:
2701 rc = ethtool_get_strings(dev, useraddr);
2702 break;
2703 case ETHTOOL_PHYS_ID:
2704 rc = ethtool_phys_id(dev, useraddr);
2705 break;
2706 case ETHTOOL_GSTATS:
2707 rc = ethtool_get_stats(dev, useraddr);
2708 break;
2709 case ETHTOOL_GPERMADDR:
2710 rc = ethtool_get_perm_addr(dev, useraddr);
2711 break;
2712 case ETHTOOL_GFLAGS:
2713 rc = ethtool_get_value(dev, useraddr, ethcmd,
2714 __ethtool_get_flags);
2715 break;
2716 case ETHTOOL_SFLAGS:
2717 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2718 break;
2719 case ETHTOOL_GPFLAGS:
2720 rc = ethtool_get_value(dev, useraddr, ethcmd,
2721 dev->ethtool_ops->get_priv_flags);
2722 break;
2723 case ETHTOOL_SPFLAGS:
2724 rc = ethtool_set_value(dev, useraddr,
2725 dev->ethtool_ops->set_priv_flags);
2726 break;
2727 case ETHTOOL_GRXFH:
2728 case ETHTOOL_GRXRINGS:
2729 case ETHTOOL_GRXCLSRLCNT:
2730 case ETHTOOL_GRXCLSRULE:
2731 case ETHTOOL_GRXCLSRLALL:
2732 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2733 break;
2734 case ETHTOOL_SRXFH:
2735 case ETHTOOL_SRXCLSRLDEL:
2736 case ETHTOOL_SRXCLSRLINS:
2737 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2738 break;
2739 case ETHTOOL_FLASHDEV:
2740 rc = ethtool_flash_device(dev, useraddr);
2741 break;
2742 case ETHTOOL_RESET:
2743 rc = ethtool_reset(dev, useraddr);
2744 break;
2745 case ETHTOOL_GSSET_INFO:
2746 rc = ethtool_get_sset_info(dev, useraddr);
2747 break;
2748 case ETHTOOL_GRXFHINDIR:
2749 rc = ethtool_get_rxfh_indir(dev, useraddr);
2750 break;
2751 case ETHTOOL_SRXFHINDIR:
2752 rc = ethtool_set_rxfh_indir(dev, useraddr);
2753 break;
2754 case ETHTOOL_GRSSH:
2755 rc = ethtool_get_rxfh(dev, useraddr);
2756 break;
2757 case ETHTOOL_SRSSH:
2758 rc = ethtool_set_rxfh(dev, useraddr);
2759 break;
2760 case ETHTOOL_GFEATURES:
2761 rc = ethtool_get_features(dev, useraddr);
2762 break;
2763 case ETHTOOL_SFEATURES:
2764 rc = ethtool_set_features(dev, useraddr);
2765 break;
2766 case ETHTOOL_GTXCSUM:
2767 case ETHTOOL_GRXCSUM:
2768 case ETHTOOL_GSG:
2769 case ETHTOOL_GTSO:
2770 case ETHTOOL_GGSO:
2771 case ETHTOOL_GGRO:
2772 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2773 break;
2774 case ETHTOOL_STXCSUM:
2775 case ETHTOOL_SRXCSUM:
2776 case ETHTOOL_SSG:
2777 case ETHTOOL_STSO:
2778 case ETHTOOL_SGSO:
2779 case ETHTOOL_SGRO:
2780 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2781 break;
2782 case ETHTOOL_GCHANNELS:
2783 rc = ethtool_get_channels(dev, useraddr);
2784 break;
2785 case ETHTOOL_SCHANNELS:
2786 rc = ethtool_set_channels(dev, useraddr);
2787 break;
2788 case ETHTOOL_SET_DUMP:
2789 rc = ethtool_set_dump(dev, useraddr);
2790 break;
2791 case ETHTOOL_GET_DUMP_FLAG:
2792 rc = ethtool_get_dump_flag(dev, useraddr);
2793 break;
2794 case ETHTOOL_GET_DUMP_DATA:
2795 rc = ethtool_get_dump_data(dev, useraddr);
2796 break;
2797 case ETHTOOL_GET_TS_INFO:
2798 rc = ethtool_get_ts_info(dev, useraddr);
2799 break;
2800 case ETHTOOL_GMODULEINFO:
2801 rc = ethtool_get_module_info(dev, useraddr);
2802 break;
2803 case ETHTOOL_GMODULEEEPROM:
2804 rc = ethtool_get_module_eeprom(dev, useraddr);
2805 break;
2806 case ETHTOOL_GTUNABLE:
2807 rc = ethtool_get_tunable(dev, useraddr);
2808 break;
2809 case ETHTOOL_STUNABLE:
2810 rc = ethtool_set_tunable(dev, useraddr);
2811 break;
2812 case ETHTOOL_GPHYSTATS:
2813 rc = ethtool_get_phy_stats(dev, useraddr);
2814 break;
2815 case ETHTOOL_PERQUEUE:
2816 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd);
2817 break;
2818 case ETHTOOL_GLINKSETTINGS:
2819 rc = ethtool_get_link_ksettings(dev, useraddr);
2820 break;
2821 case ETHTOOL_SLINKSETTINGS:
2822 rc = ethtool_set_link_ksettings(dev, useraddr);
2823 break;
2824 case ETHTOOL_PHY_GTUNABLE:
2825 rc = get_phy_tunable(dev, useraddr);
2826 break;
2827 case ETHTOOL_PHY_STUNABLE:
2828 rc = set_phy_tunable(dev, useraddr);
2829 break;
2830 case ETHTOOL_GFECPARAM:
2831 rc = ethtool_get_fecparam(dev, useraddr);
2832 break;
2833 case ETHTOOL_SFECPARAM:
2834 rc = ethtool_set_fecparam(dev, useraddr);
2835 break;
2836 default:
2837 rc = -EOPNOTSUPP;
2838 }
2839
2840 if (dev->ethtool_ops->complete)
2841 dev->ethtool_ops->complete(dev);
2842
2843 if (old_features != dev->features)
2844 netdev_features_change(dev);
2845
2846 return rc;
2847 }
2848
2849 struct ethtool_rx_flow_key {
2850 struct flow_dissector_key_basic basic;
2851 union {
2852 struct flow_dissector_key_ipv4_addrs ipv4;
2853 struct flow_dissector_key_ipv6_addrs ipv6;
2854 };
2855 struct flow_dissector_key_ports tp;
2856 struct flow_dissector_key_ip ip;
2857 struct flow_dissector_key_vlan vlan;
2858 struct flow_dissector_key_eth_addrs eth_addrs;
2859 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
2860
2861 struct ethtool_rx_flow_match {
2862 struct flow_dissector dissector;
2863 struct ethtool_rx_flow_key key;
2864 struct ethtool_rx_flow_key mask;
2865 };
2866
2867 struct ethtool_rx_flow_rule *
ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input * input)2868 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input)
2869 {
2870 const struct ethtool_rx_flow_spec *fs = input->fs;
2871 static struct in6_addr zero_addr = {};
2872 struct ethtool_rx_flow_match *match;
2873 struct ethtool_rx_flow_rule *flow;
2874 struct flow_action_entry *act;
2875
2876 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) +
2877 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL);
2878 if (!flow)
2879 return ERR_PTR(-ENOMEM);
2880
2881 /* ethtool_rx supports only one single action per rule. */
2882 flow->rule = flow_rule_alloc(1);
2883 if (!flow->rule) {
2884 kfree(flow);
2885 return ERR_PTR(-ENOMEM);
2886 }
2887
2888 match = (struct ethtool_rx_flow_match *)flow->priv;
2889 flow->rule->match.dissector = &match->dissector;
2890 flow->rule->match.mask = &match->mask;
2891 flow->rule->match.key = &match->key;
2892
2893 match->mask.basic.n_proto = htons(0xffff);
2894
2895 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
2896 case ETHER_FLOW: {
2897 const struct ethhdr *ether_spec, *ether_m_spec;
2898
2899 ether_spec = &fs->h_u.ether_spec;
2900 ether_m_spec = &fs->m_u.ether_spec;
2901
2902 if (!is_zero_ether_addr(ether_m_spec->h_source)) {
2903 ether_addr_copy(match->key.eth_addrs.src,
2904 ether_spec->h_source);
2905 ether_addr_copy(match->mask.eth_addrs.src,
2906 ether_m_spec->h_source);
2907 }
2908 if (!is_zero_ether_addr(ether_m_spec->h_dest)) {
2909 ether_addr_copy(match->key.eth_addrs.dst,
2910 ether_spec->h_dest);
2911 ether_addr_copy(match->mask.eth_addrs.dst,
2912 ether_m_spec->h_dest);
2913 }
2914 if (ether_m_spec->h_proto) {
2915 match->key.basic.n_proto = ether_spec->h_proto;
2916 match->mask.basic.n_proto = ether_m_spec->h_proto;
2917 }
2918 }
2919 break;
2920 case TCP_V4_FLOW:
2921 case UDP_V4_FLOW: {
2922 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec;
2923
2924 match->key.basic.n_proto = htons(ETH_P_IP);
2925
2926 v4_spec = &fs->h_u.tcp_ip4_spec;
2927 v4_m_spec = &fs->m_u.tcp_ip4_spec;
2928
2929 if (v4_m_spec->ip4src) {
2930 match->key.ipv4.src = v4_spec->ip4src;
2931 match->mask.ipv4.src = v4_m_spec->ip4src;
2932 }
2933 if (v4_m_spec->ip4dst) {
2934 match->key.ipv4.dst = v4_spec->ip4dst;
2935 match->mask.ipv4.dst = v4_m_spec->ip4dst;
2936 }
2937 if (v4_m_spec->ip4src ||
2938 v4_m_spec->ip4dst) {
2939 match->dissector.used_keys |=
2940 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS);
2941 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] =
2942 offsetof(struct ethtool_rx_flow_key, ipv4);
2943 }
2944 if (v4_m_spec->psrc) {
2945 match->key.tp.src = v4_spec->psrc;
2946 match->mask.tp.src = v4_m_spec->psrc;
2947 }
2948 if (v4_m_spec->pdst) {
2949 match->key.tp.dst = v4_spec->pdst;
2950 match->mask.tp.dst = v4_m_spec->pdst;
2951 }
2952 if (v4_m_spec->psrc ||
2953 v4_m_spec->pdst) {
2954 match->dissector.used_keys |=
2955 BIT(FLOW_DISSECTOR_KEY_PORTS);
2956 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
2957 offsetof(struct ethtool_rx_flow_key, tp);
2958 }
2959 if (v4_m_spec->tos) {
2960 match->key.ip.tos = v4_spec->tos;
2961 match->mask.ip.tos = v4_m_spec->tos;
2962 match->dissector.used_keys |=
2963 BIT(FLOW_DISSECTOR_KEY_IP);
2964 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
2965 offsetof(struct ethtool_rx_flow_key, ip);
2966 }
2967 }
2968 break;
2969 case TCP_V6_FLOW:
2970 case UDP_V6_FLOW: {
2971 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec;
2972
2973 match->key.basic.n_proto = htons(ETH_P_IPV6);
2974
2975 v6_spec = &fs->h_u.tcp_ip6_spec;
2976 v6_m_spec = &fs->m_u.tcp_ip6_spec;
2977 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2978 memcpy(&match->key.ipv6.src, v6_spec->ip6src,
2979 sizeof(match->key.ipv6.src));
2980 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src,
2981 sizeof(match->mask.ipv6.src));
2982 }
2983 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) {
2984 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst,
2985 sizeof(match->key.ipv6.dst));
2986 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst,
2987 sizeof(match->mask.ipv6.dst));
2988 }
2989 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) ||
2990 memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) {
2991 match->dissector.used_keys |=
2992 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS);
2993 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] =
2994 offsetof(struct ethtool_rx_flow_key, ipv6);
2995 }
2996 if (v6_m_spec->psrc) {
2997 match->key.tp.src = v6_spec->psrc;
2998 match->mask.tp.src = v6_m_spec->psrc;
2999 }
3000 if (v6_m_spec->pdst) {
3001 match->key.tp.dst = v6_spec->pdst;
3002 match->mask.tp.dst = v6_m_spec->pdst;
3003 }
3004 if (v6_m_spec->psrc ||
3005 v6_m_spec->pdst) {
3006 match->dissector.used_keys |=
3007 BIT(FLOW_DISSECTOR_KEY_PORTS);
3008 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] =
3009 offsetof(struct ethtool_rx_flow_key, tp);
3010 }
3011 if (v6_m_spec->tclass) {
3012 match->key.ip.tos = v6_spec->tclass;
3013 match->mask.ip.tos = v6_m_spec->tclass;
3014 match->dissector.used_keys |=
3015 BIT(FLOW_DISSECTOR_KEY_IP);
3016 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] =
3017 offsetof(struct ethtool_rx_flow_key, ip);
3018 }
3019 }
3020 break;
3021 default:
3022 ethtool_rx_flow_rule_destroy(flow);
3023 return ERR_PTR(-EINVAL);
3024 }
3025
3026 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) {
3027 case TCP_V4_FLOW:
3028 case TCP_V6_FLOW:
3029 match->key.basic.ip_proto = IPPROTO_TCP;
3030 break;
3031 case UDP_V4_FLOW:
3032 case UDP_V6_FLOW:
3033 match->key.basic.ip_proto = IPPROTO_UDP;
3034 break;
3035 }
3036 match->mask.basic.ip_proto = 0xff;
3037
3038 match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC);
3039 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] =
3040 offsetof(struct ethtool_rx_flow_key, basic);
3041
3042 if (fs->flow_type & FLOW_EXT) {
3043 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3044 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3045
3046 if (ext_m_spec->vlan_etype) {
3047 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype;
3048 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype;
3049 }
3050
3051 if (ext_m_spec->vlan_tci) {
3052 match->key.vlan.vlan_id =
3053 ntohs(ext_h_spec->vlan_tci) & 0x0fff;
3054 match->mask.vlan.vlan_id =
3055 ntohs(ext_m_spec->vlan_tci) & 0x0fff;
3056
3057 match->key.vlan.vlan_dei =
3058 !!(ext_h_spec->vlan_tci & htons(0x1000));
3059 match->mask.vlan.vlan_dei =
3060 !!(ext_m_spec->vlan_tci & htons(0x1000));
3061
3062 match->key.vlan.vlan_priority =
3063 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13;
3064 match->mask.vlan.vlan_priority =
3065 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13;
3066 }
3067
3068 if (ext_m_spec->vlan_etype ||
3069 ext_m_spec->vlan_tci) {
3070 match->dissector.used_keys |=
3071 BIT(FLOW_DISSECTOR_KEY_VLAN);
3072 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] =
3073 offsetof(struct ethtool_rx_flow_key, vlan);
3074 }
3075 }
3076 if (fs->flow_type & FLOW_MAC_EXT) {
3077 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext;
3078 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext;
3079
3080 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest,
3081 ETH_ALEN);
3082 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest,
3083 ETH_ALEN);
3084
3085 match->dissector.used_keys |=
3086 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS);
3087 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] =
3088 offsetof(struct ethtool_rx_flow_key, eth_addrs);
3089 }
3090
3091 act = &flow->rule->action.entries[0];
3092 switch (fs->ring_cookie) {
3093 case RX_CLS_FLOW_DISC:
3094 act->id = FLOW_ACTION_DROP;
3095 break;
3096 case RX_CLS_FLOW_WAKE:
3097 act->id = FLOW_ACTION_WAKE;
3098 break;
3099 default:
3100 act->id = FLOW_ACTION_QUEUE;
3101 if (fs->flow_type & FLOW_RSS)
3102 act->queue.ctx = input->rss_ctx;
3103
3104 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie);
3105 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie);
3106 break;
3107 }
3108
3109 return flow;
3110 }
3111 EXPORT_SYMBOL(ethtool_rx_flow_rule_create);
3112
ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule * flow)3113 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow)
3114 {
3115 kfree(flow->rule);
3116 kfree(flow);
3117 }
3118 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy);
3119