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mm/zsmalloc: allocate exactly size of struct zs_pool
[linux/fpc-iii.git] / net / core / ethtool.c
blob550892cd6b3ff4ec1325bc1094bb9f217409c7e2
1 /*
2 * net/core/ethtool.c - Ethtool ioctl handler
3 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
4 *
5 * This file is where we call all the ethtool_ops commands to get
6 * the information ethtool needs.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14 #include <linux/module.h>
15 #include <linux/types.h>
16 #include <linux/capability.h>
17 #include <linux/errno.h>
18 #include <linux/ethtool.h>
19 #include <linux/netdevice.h>
20 #include <linux/net_tstamp.h>
21 #include <linux/phy.h>
22 #include <linux/bitops.h>
23 #include <linux/uaccess.h>
24 #include <linux/vmalloc.h>
25 #include <linux/slab.h>
26 #include <linux/rtnetlink.h>
27 #include <linux/sched.h>
28 #include <linux/net.h>
29
30 /*
31 * Some useful ethtool_ops methods that're device independent.
32 * If we find that all drivers want to do the same thing here,
33 * we can turn these into dev_() function calls.
34 */
35
36 u32 ethtool_op_get_link(struct net_device *dev)
37 {
38 return netif_carrier_ok(dev) ? 1 : 0;
39 }
40 EXPORT_SYMBOL(ethtool_op_get_link);
41
42 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
43 {
44 info->so_timestamping =
45 SOF_TIMESTAMPING_TX_SOFTWARE |
46 SOF_TIMESTAMPING_RX_SOFTWARE |
47 SOF_TIMESTAMPING_SOFTWARE;
48 info->phc_index = -1;
49 return 0;
50 }
51 EXPORT_SYMBOL(ethtool_op_get_ts_info);
52
53 /* Handlers for each ethtool command */
54
55 #define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
56
57 static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
58 [NETIF_F_SG_BIT] = "tx-scatter-gather",
59 [NETIF_F_IP_CSUM_BIT] = "tx-checksum-ipv4",
60 [NETIF_F_HW_CSUM_BIT] = "tx-checksum-ip-generic",
61 [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6",
62 [NETIF_F_HIGHDMA_BIT] = "highdma",
63 [NETIF_F_FRAGLIST_BIT] = "tx-scatter-gather-fraglist",
64 [NETIF_F_HW_VLAN_CTAG_TX_BIT] = "tx-vlan-hw-insert",
65
66 [NETIF_F_HW_VLAN_CTAG_RX_BIT] = "rx-vlan-hw-parse",
67 [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
68 [NETIF_F_HW_VLAN_STAG_TX_BIT] = "tx-vlan-stag-hw-insert",
69 [NETIF_F_HW_VLAN_STAG_RX_BIT] = "rx-vlan-stag-hw-parse",
70 [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
71 [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged",
72 [NETIF_F_GSO_BIT] = "tx-generic-segmentation",
73 [NETIF_F_LLTX_BIT] = "tx-lockless",
74 [NETIF_F_NETNS_LOCAL_BIT] = "netns-local",
75 [NETIF_F_GRO_BIT] = "rx-gro",
76 [NETIF_F_LRO_BIT] = "rx-lro",
77
78 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation",
79 [NETIF_F_UFO_BIT] = "tx-udp-fragmentation",
80 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
81 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
82 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
83 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
84 [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
85 [NETIF_F_GSO_IPIP_BIT] = "tx-ipip-segmentation",
86 [NETIF_F_GSO_SIT_BIT] = "tx-sit-segmentation",
87 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
88
89 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
90 [NETIF_F_SCTP_CSUM_BIT] = "tx-checksum-sctp",
91 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
92 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
93 [NETIF_F_RXHASH_BIT] = "rx-hashing",
94 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
95 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
96 [NETIF_F_LOOPBACK_BIT] = "loopback",
97 [NETIF_F_RXFCS_BIT] = "rx-fcs",
98 [NETIF_F_RXALL_BIT] = "rx-all",
99 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
100 [NETIF_F_BUSY_POLL_BIT] = "busy-poll",
101 };
102
103 static const char
104 rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
105 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
106 [ETH_RSS_HASH_XOR_BIT] = "xor",
107 };
108
109 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
110 {
111 struct ethtool_gfeatures cmd = {
112 .cmd = ETHTOOL_GFEATURES,
113 .size = ETHTOOL_DEV_FEATURE_WORDS,
114 };
115 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
116 u32 __user *sizeaddr;
117 u32 copy_size;
118 int i;
119
120 /* in case feature bits run out again */
121 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
122
123 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
124 features[i].available = (u32)(dev->hw_features >> (32 * i));
125 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
126 features[i].active = (u32)(dev->features >> (32 * i));
127 features[i].never_changed =
128 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
129 }
130
131 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
132 if (get_user(copy_size, sizeaddr))
133 return -EFAULT;
134
135 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
136 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
137
138 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
139 return -EFAULT;
140 useraddr += sizeof(cmd);
141 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
142 return -EFAULT;
143
144 return 0;
145 }
146
147 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
148 {
149 struct ethtool_sfeatures cmd;
150 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
151 netdev_features_t wanted = 0, valid = 0;
152 int i, ret = 0;
153
154 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
155 return -EFAULT;
156 useraddr += sizeof(cmd);
157
158 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
159 return -EINVAL;
160
161 if (copy_from_user(features, useraddr, sizeof(features)))
162 return -EFAULT;
163
164 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
165 valid |= (netdev_features_t)features[i].valid << (32 * i);
166 wanted |= (netdev_features_t)features[i].requested << (32 * i);
167 }
168
169 if (valid & ~NETIF_F_ETHTOOL_BITS)
170 return -EINVAL;
171
172 if (valid & ~dev->hw_features) {
173 valid &= dev->hw_features;
174 ret |= ETHTOOL_F_UNSUPPORTED;
175 }
176
177 dev->wanted_features &= ~valid;
178 dev->wanted_features |= wanted & valid;
179 __netdev_update_features(dev);
180
181 if ((dev->wanted_features ^ dev->features) & valid)
182 ret |= ETHTOOL_F_WISH;
183
184 return ret;
185 }
186
187 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
188 {
189 const struct ethtool_ops *ops = dev->ethtool_ops;
190
191 if (sset == ETH_SS_FEATURES)
192 return ARRAY_SIZE(netdev_features_strings);
193
194 if (sset == ETH_SS_RSS_HASH_FUNCS)
195 return ARRAY_SIZE(rss_hash_func_strings);
196
197 if (ops->get_sset_count && ops->get_strings)
198 return ops->get_sset_count(dev, sset);
199 else
200 return -EOPNOTSUPP;
201 }
202
203 static void __ethtool_get_strings(struct net_device *dev,
204 u32 stringset, u8 *data)
205 {
206 const struct ethtool_ops *ops = dev->ethtool_ops;
207
208 if (stringset == ETH_SS_FEATURES)
209 memcpy(data, netdev_features_strings,
210 sizeof(netdev_features_strings));
211 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
212 memcpy(data, rss_hash_func_strings,
213 sizeof(rss_hash_func_strings));
214 else
215 /* ops->get_strings is valid because checked earlier */
216 ops->get_strings(dev, stringset, data);
217 }
218
219 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
220 {
221 /* feature masks of legacy discrete ethtool ops */
222
223 switch (eth_cmd) {
224 case ETHTOOL_GTXCSUM:
225 case ETHTOOL_STXCSUM:
226 return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM;
227 case ETHTOOL_GRXCSUM:
228 case ETHTOOL_SRXCSUM:
229 return NETIF_F_RXCSUM;
230 case ETHTOOL_GSG:
231 case ETHTOOL_SSG:
232 return NETIF_F_SG;
233 case ETHTOOL_GTSO:
234 case ETHTOOL_STSO:
235 return NETIF_F_ALL_TSO;
236 case ETHTOOL_GUFO:
237 case ETHTOOL_SUFO:
238 return NETIF_F_UFO;
239 case ETHTOOL_GGSO:
240 case ETHTOOL_SGSO:
241 return NETIF_F_GSO;
242 case ETHTOOL_GGRO:
243 case ETHTOOL_SGRO:
244 return NETIF_F_GRO;
245 default:
246 BUG();
247 }
248 }
249
250 static int ethtool_get_one_feature(struct net_device *dev,
251 char __user *useraddr, u32 ethcmd)
252 {
253 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
254 struct ethtool_value edata = {
255 .cmd = ethcmd,
256 .data = !!(dev->features & mask),
257 };
258
259 if (copy_to_user(useraddr, &edata, sizeof(edata)))
260 return -EFAULT;
261 return 0;
262 }
263
264 static int ethtool_set_one_feature(struct net_device *dev,
265 void __user *useraddr, u32 ethcmd)
266 {
267 struct ethtool_value edata;
268 netdev_features_t mask;
269
270 if (copy_from_user(&edata, useraddr, sizeof(edata)))
271 return -EFAULT;
272
273 mask = ethtool_get_feature_mask(ethcmd);
274 mask &= dev->hw_features;
275 if (!mask)
276 return -EOPNOTSUPP;
277
278 if (edata.data)
279 dev->wanted_features |= mask;
280 else
281 dev->wanted_features &= ~mask;
282
283 __netdev_update_features(dev);
284
285 return 0;
286 }
287
288 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
289 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
290 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
291 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
292 NETIF_F_RXHASH)
293
294 static u32 __ethtool_get_flags(struct net_device *dev)
295 {
296 u32 flags = 0;
297
298 if (dev->features & NETIF_F_LRO)
299 flags |= ETH_FLAG_LRO;
300 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
301 flags |= ETH_FLAG_RXVLAN;
302 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
303 flags |= ETH_FLAG_TXVLAN;
304 if (dev->features & NETIF_F_NTUPLE)
305 flags |= ETH_FLAG_NTUPLE;
306 if (dev->features & NETIF_F_RXHASH)
307 flags |= ETH_FLAG_RXHASH;
308
309 return flags;
310 }
311
312 static int __ethtool_set_flags(struct net_device *dev, u32 data)
313 {
314 netdev_features_t features = 0, changed;
315
316 if (data & ~ETH_ALL_FLAGS)
317 return -EINVAL;
318
319 if (data & ETH_FLAG_LRO)
320 features |= NETIF_F_LRO;
321 if (data & ETH_FLAG_RXVLAN)
322 features |= NETIF_F_HW_VLAN_CTAG_RX;
323 if (data & ETH_FLAG_TXVLAN)
324 features |= NETIF_F_HW_VLAN_CTAG_TX;
325 if (data & ETH_FLAG_NTUPLE)
326 features |= NETIF_F_NTUPLE;
327 if (data & ETH_FLAG_RXHASH)
328 features |= NETIF_F_RXHASH;
329
330 /* allow changing only bits set in hw_features */
331 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
332 if (changed & ~dev->hw_features)
333 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
334
335 dev->wanted_features =
336 (dev->wanted_features & ~changed) | (features & changed);
337
338 __netdev_update_features(dev);
339
340 return 0;
341 }
342
343 int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
344 {
345 ASSERT_RTNL();
346
347 if (!dev->ethtool_ops->get_settings)
348 return -EOPNOTSUPP;
349
350 memset(cmd, 0, sizeof(struct ethtool_cmd));
351 cmd->cmd = ETHTOOL_GSET;
352 return dev->ethtool_ops->get_settings(dev, cmd);
353 }
354 EXPORT_SYMBOL(__ethtool_get_settings);
355
356 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
357 {
358 int err;
359 struct ethtool_cmd cmd;
360
361 err = __ethtool_get_settings(dev, &cmd);
362 if (err < 0)
363 return err;
364
365 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
366 return -EFAULT;
367 return 0;
368 }
369
370 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
371 {
372 struct ethtool_cmd cmd;
373
374 if (!dev->ethtool_ops->set_settings)
375 return -EOPNOTSUPP;
376
377 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
378 return -EFAULT;
379
380 return dev->ethtool_ops->set_settings(dev, &cmd);
381 }
382
383 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
384 void __user *useraddr)
385 {
386 struct ethtool_drvinfo info;
387 const struct ethtool_ops *ops = dev->ethtool_ops;
388
389 memset(&info, 0, sizeof(info));
390 info.cmd = ETHTOOL_GDRVINFO;
391 if (ops->get_drvinfo) {
392 ops->get_drvinfo(dev, &info);
393 } else if (dev->dev.parent && dev->dev.parent->driver) {
394 strlcpy(info.bus_info, dev_name(dev->dev.parent),
395 sizeof(info.bus_info));
396 strlcpy(info.driver, dev->dev.parent->driver->name,
397 sizeof(info.driver));
398 } else {
399 return -EOPNOTSUPP;
400 }
401
402 /*
403 * this method of obtaining string set info is deprecated;
404 * Use ETHTOOL_GSSET_INFO instead.
405 */
406 if (ops->get_sset_count) {
407 int rc;
408
409 rc = ops->get_sset_count(dev, ETH_SS_TEST);
410 if (rc >= 0)
411 info.testinfo_len = rc;
412 rc = ops->get_sset_count(dev, ETH_SS_STATS);
413 if (rc >= 0)
414 info.n_stats = rc;
415 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
416 if (rc >= 0)
417 info.n_priv_flags = rc;
418 }
419 if (ops->get_regs_len)
420 info.regdump_len = ops->get_regs_len(dev);
421 if (ops->get_eeprom_len)
422 info.eedump_len = ops->get_eeprom_len(dev);
423
424 if (copy_to_user(useraddr, &info, sizeof(info)))
425 return -EFAULT;
426 return 0;
427 }
428
429 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
430 void __user *useraddr)
431 {
432 struct ethtool_sset_info info;
433 u64 sset_mask;
434 int i, idx = 0, n_bits = 0, ret, rc;
435 u32 *info_buf = NULL;
436
437 if (copy_from_user(&info, useraddr, sizeof(info)))
438 return -EFAULT;
439
440 /* store copy of mask, because we zero struct later on */
441 sset_mask = info.sset_mask;
442 if (!sset_mask)
443 return 0;
444
445 /* calculate size of return buffer */
446 n_bits = hweight64(sset_mask);
447
448 memset(&info, 0, sizeof(info));
449 info.cmd = ETHTOOL_GSSET_INFO;
450
451 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
452 if (!info_buf)
453 return -ENOMEM;
454
455 /*
456 * fill return buffer based on input bitmask and successful
457 * get_sset_count return
458 */
459 for (i = 0; i < 64; i++) {
460 if (!(sset_mask & (1ULL << i)))
461 continue;
462
463 rc = __ethtool_get_sset_count(dev, i);
464 if (rc >= 0) {
465 info.sset_mask |= (1ULL << i);
466 info_buf[idx++] = rc;
467 }
468 }
469
470 ret = -EFAULT;
471 if (copy_to_user(useraddr, &info, sizeof(info)))
472 goto out;
473
474 useraddr += offsetof(struct ethtool_sset_info, data);
475 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
476 goto out;
477
478 ret = 0;
479
480 out:
481 kfree(info_buf);
482 return ret;
483 }
484
485 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
486 u32 cmd, void __user *useraddr)
487 {
488 struct ethtool_rxnfc info;
489 size_t info_size = sizeof(info);
490 int rc;
491
492 if (!dev->ethtool_ops->set_rxnfc)
493 return -EOPNOTSUPP;
494
495 /* struct ethtool_rxnfc was originally defined for
496 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
497 * members. User-space might still be using that
498 * definition. */
499 if (cmd == ETHTOOL_SRXFH)
500 info_size = (offsetof(struct ethtool_rxnfc, data) +
501 sizeof(info.data));
502
503 if (copy_from_user(&info, useraddr, info_size))
504 return -EFAULT;
505
506 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
507 if (rc)
508 return rc;
509
510 if (cmd == ETHTOOL_SRXCLSRLINS &&
511 copy_to_user(useraddr, &info, info_size))
512 return -EFAULT;
513
514 return 0;
515 }
516
517 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
518 u32 cmd, void __user *useraddr)
519 {
520 struct ethtool_rxnfc info;
521 size_t info_size = sizeof(info);
522 const struct ethtool_ops *ops = dev->ethtool_ops;
523 int ret;
524 void *rule_buf = NULL;
525
526 if (!ops->get_rxnfc)
527 return -EOPNOTSUPP;
528
529 /* struct ethtool_rxnfc was originally defined for
530 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
531 * members. User-space might still be using that
532 * definition. */
533 if (cmd == ETHTOOL_GRXFH)
534 info_size = (offsetof(struct ethtool_rxnfc, data) +
535 sizeof(info.data));
536
537 if (copy_from_user(&info, useraddr, info_size))
538 return -EFAULT;
539
540 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
541 if (info.rule_cnt > 0) {
542 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
543 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
544 GFP_USER);
545 if (!rule_buf)
546 return -ENOMEM;
547 }
548 }
549
550 ret = ops->get_rxnfc(dev, &info, rule_buf);
551 if (ret < 0)
552 goto err_out;
553
554 ret = -EFAULT;
555 if (copy_to_user(useraddr, &info, info_size))
556 goto err_out;
557
558 if (rule_buf) {
559 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
560 if (copy_to_user(useraddr, rule_buf,
561 info.rule_cnt * sizeof(u32)))
562 goto err_out;
563 }
564 ret = 0;
565
566 err_out:
567 kfree(rule_buf);
568
569 return ret;
570 }
571
572 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
573 struct ethtool_rxnfc *rx_rings,
574 u32 size)
575 {
576 int i;
577
578 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
579 return -EFAULT;
580
581 /* Validate ring indices */
582 for (i = 0; i < size; i++)
583 if (indir[i] >= rx_rings->data)
584 return -EINVAL;
585
586 return 0;
587 }
588
589 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN];
590
591 void netdev_rss_key_fill(void *buffer, size_t len)
592 {
593 BUG_ON(len > sizeof(netdev_rss_key));
594 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
595 memcpy(buffer, netdev_rss_key, len);
596 }
597 EXPORT_SYMBOL(netdev_rss_key_fill);
598
599 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
600 void __user *useraddr)
601 {
602 u32 user_size, dev_size;
603 u32 *indir;
604 int ret;
605
606 if (!dev->ethtool_ops->get_rxfh_indir_size ||
607 !dev->ethtool_ops->get_rxfh)
608 return -EOPNOTSUPP;
609 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
610 if (dev_size == 0)
611 return -EOPNOTSUPP;
612
613 if (copy_from_user(&user_size,
614 useraddr + offsetof(struct ethtool_rxfh_indir, size),
615 sizeof(user_size)))
616 return -EFAULT;
617
618 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
619 &dev_size, sizeof(dev_size)))
620 return -EFAULT;
621
622 /* If the user buffer size is 0, this is just a query for the
623 * device table size. Otherwise, if it's smaller than the
624 * device table size it's an error.
625 */
626 if (user_size < dev_size)
627 return user_size == 0 ? 0 : -EINVAL;
628
629 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
630 if (!indir)
631 return -ENOMEM;
632
633 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
634 if (ret)
635 goto out;
636
637 if (copy_to_user(useraddr +
638 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
639 indir, dev_size * sizeof(indir[0])))
640 ret = -EFAULT;
641
642 out:
643 kfree(indir);
644 return ret;
645 }
646
647 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
648 void __user *useraddr)
649 {
650 struct ethtool_rxnfc rx_rings;
651 u32 user_size, dev_size, i;
652 u32 *indir;
653 const struct ethtool_ops *ops = dev->ethtool_ops;
654 int ret;
655 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
656
657 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
658 !ops->get_rxnfc)
659 return -EOPNOTSUPP;
660
661 dev_size = ops->get_rxfh_indir_size(dev);
662 if (dev_size == 0)
663 return -EOPNOTSUPP;
664
665 if (copy_from_user(&user_size,
666 useraddr + offsetof(struct ethtool_rxfh_indir, size),
667 sizeof(user_size)))
668 return -EFAULT;
669
670 if (user_size != 0 && user_size != dev_size)
671 return -EINVAL;
672
673 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
674 if (!indir)
675 return -ENOMEM;
676
677 rx_rings.cmd = ETHTOOL_GRXRINGS;
678 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
679 if (ret)
680 goto out;
681
682 if (user_size == 0) {
683 for (i = 0; i < dev_size; i++)
684 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
685 } else {
686 ret = ethtool_copy_validate_indir(indir,
687 useraddr + ringidx_offset,
688 &rx_rings,
689 dev_size);
690 if (ret)
691 goto out;
692 }
693
694 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
695
696 out:
697 kfree(indir);
698 return ret;
699 }
700
701 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
702 void __user *useraddr)
703 {
704 int ret;
705 const struct ethtool_ops *ops = dev->ethtool_ops;
706 u32 user_indir_size, user_key_size;
707 u32 dev_indir_size = 0, dev_key_size = 0;
708 struct ethtool_rxfh rxfh;
709 u32 total_size;
710 u32 indir_bytes;
711 u32 *indir = NULL;
712 u8 dev_hfunc = 0;
713 u8 *hkey = NULL;
714 u8 *rss_config;
715
716 if (!ops->get_rxfh)
717 return -EOPNOTSUPP;
718
719 if (ops->get_rxfh_indir_size)
720 dev_indir_size = ops->get_rxfh_indir_size(dev);
721 if (ops->get_rxfh_key_size)
722 dev_key_size = ops->get_rxfh_key_size(dev);
723
724 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
725 return -EFAULT;
726 user_indir_size = rxfh.indir_size;
727 user_key_size = rxfh.key_size;
728
729 /* Check that reserved fields are 0 for now */
730 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
731 rxfh.rsvd8[2] || rxfh.rsvd32)
732 return -EINVAL;
733
734 rxfh.indir_size = dev_indir_size;
735 rxfh.key_size = dev_key_size;
736 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
737 return -EFAULT;
738
739 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
740 (user_key_size && (user_key_size != dev_key_size)))
741 return -EINVAL;
742
743 indir_bytes = user_indir_size * sizeof(indir[0]);
744 total_size = indir_bytes + user_key_size;
745 rss_config = kzalloc(total_size, GFP_USER);
746 if (!rss_config)
747 return -ENOMEM;
748
749 if (user_indir_size)
750 indir = (u32 *)rss_config;
751
752 if (user_key_size)
753 hkey = rss_config + indir_bytes;
754
755 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
756 if (ret)
757 goto out;
758
759 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
760 &dev_hfunc, sizeof(rxfh.hfunc))) {
761 ret = -EFAULT;
762 } else if (copy_to_user(useraddr +
763 offsetof(struct ethtool_rxfh, rss_config[0]),
764 rss_config, total_size)) {
765 ret = -EFAULT;
766 }
767 out:
768 kfree(rss_config);
769
770 return ret;
771 }
772
773 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
774 void __user *useraddr)
775 {
776 int ret;
777 const struct ethtool_ops *ops = dev->ethtool_ops;
778 struct ethtool_rxnfc rx_rings;
779 struct ethtool_rxfh rxfh;
780 u32 dev_indir_size = 0, dev_key_size = 0, i;
781 u32 *indir = NULL, indir_bytes = 0;
782 u8 *hkey = NULL;
783 u8 *rss_config;
784 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
785
786 if (!ops->get_rxnfc || !ops->set_rxfh)
787 return -EOPNOTSUPP;
788
789 if (ops->get_rxfh_indir_size)
790 dev_indir_size = ops->get_rxfh_indir_size(dev);
791 if (ops->get_rxfh_key_size)
792 dev_key_size = dev->ethtool_ops->get_rxfh_key_size(dev);
793
794 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
795 return -EFAULT;
796
797 /* Check that reserved fields are 0 for now */
798 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
799 rxfh.rsvd8[2] || rxfh.rsvd32)
800 return -EINVAL;
801
802 /* If either indir, hash key or function is valid, proceed further.
803 * Must request at least one change: indir size, hash key or function.
804 */
805 if ((rxfh.indir_size &&
806 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
807 rxfh.indir_size != dev_indir_size) ||
808 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
809 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
810 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
811 return -EINVAL;
812
813 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
814 indir_bytes = dev_indir_size * sizeof(indir[0]);
815
816 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
817 if (!rss_config)
818 return -ENOMEM;
819
820 rx_rings.cmd = ETHTOOL_GRXRINGS;
821 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
822 if (ret)
823 goto out;
824
825 /* rxfh.indir_size == 0 means reset the indir table to default.
826 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
827 */
828 if (rxfh.indir_size &&
829 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
830 indir = (u32 *)rss_config;
831 ret = ethtool_copy_validate_indir(indir,
832 useraddr + rss_cfg_offset,
833 &rx_rings,
834 rxfh.indir_size);
835 if (ret)
836 goto out;
837 } else if (rxfh.indir_size == 0) {
838 indir = (u32 *)rss_config;
839 for (i = 0; i < dev_indir_size; i++)
840 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
841 }
842
843 if (rxfh.key_size) {
844 hkey = rss_config + indir_bytes;
845 if (copy_from_user(hkey,
846 useraddr + rss_cfg_offset + indir_bytes,
847 rxfh.key_size)) {
848 ret = -EFAULT;
849 goto out;
850 }
851 }
852
853 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
854
855 out:
856 kfree(rss_config);
857 return ret;
858 }
859
860 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
861 {
862 struct ethtool_regs regs;
863 const struct ethtool_ops *ops = dev->ethtool_ops;
864 void *regbuf;
865 int reglen, ret;
866
867 if (!ops->get_regs || !ops->get_regs_len)
868 return -EOPNOTSUPP;
869
870 if (copy_from_user(&regs, useraddr, sizeof(regs)))
871 return -EFAULT;
872
873 reglen = ops->get_regs_len(dev);
874 if (regs.len > reglen)
875 regs.len = reglen;
876
877 regbuf = vzalloc(reglen);
878 if (reglen && !regbuf)
879 return -ENOMEM;
880
881 ops->get_regs(dev, &regs, regbuf);
882
883 ret = -EFAULT;
884 if (copy_to_user(useraddr, &regs, sizeof(regs)))
885 goto out;
886 useraddr += offsetof(struct ethtool_regs, data);
887 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
888 goto out;
889 ret = 0;
890
891 out:
892 vfree(regbuf);
893 return ret;
894 }
895
896 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
897 {
898 struct ethtool_value reset;
899 int ret;
900
901 if (!dev->ethtool_ops->reset)
902 return -EOPNOTSUPP;
903
904 if (copy_from_user(&reset, useraddr, sizeof(reset)))
905 return -EFAULT;
906
907 ret = dev->ethtool_ops->reset(dev, &reset.data);
908 if (ret)
909 return ret;
910
911 if (copy_to_user(useraddr, &reset, sizeof(reset)))
912 return -EFAULT;
913 return 0;
914 }
915
916 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
917 {
918 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
919
920 if (!dev->ethtool_ops->get_wol)
921 return -EOPNOTSUPP;
922
923 dev->ethtool_ops->get_wol(dev, &wol);
924
925 if (copy_to_user(useraddr, &wol, sizeof(wol)))
926 return -EFAULT;
927 return 0;
928 }
929
930 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
931 {
932 struct ethtool_wolinfo wol;
933
934 if (!dev->ethtool_ops->set_wol)
935 return -EOPNOTSUPP;
936
937 if (copy_from_user(&wol, useraddr, sizeof(wol)))
938 return -EFAULT;
939
940 return dev->ethtool_ops->set_wol(dev, &wol);
941 }
942
943 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
944 {
945 struct ethtool_eee edata;
946 int rc;
947
948 if (!dev->ethtool_ops->get_eee)
949 return -EOPNOTSUPP;
950
951 memset(&edata, 0, sizeof(struct ethtool_eee));
952 edata.cmd = ETHTOOL_GEEE;
953 rc = dev->ethtool_ops->get_eee(dev, &edata);
954
955 if (rc)
956 return rc;
957
958 if (copy_to_user(useraddr, &edata, sizeof(edata)))
959 return -EFAULT;
960
961 return 0;
962 }
963
964 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
965 {
966 struct ethtool_eee edata;
967
968 if (!dev->ethtool_ops->set_eee)
969 return -EOPNOTSUPP;
970
971 if (copy_from_user(&edata, useraddr, sizeof(edata)))
972 return -EFAULT;
973
974 return dev->ethtool_ops->set_eee(dev, &edata);
975 }
976
977 static int ethtool_nway_reset(struct net_device *dev)
978 {
979 if (!dev->ethtool_ops->nway_reset)
980 return -EOPNOTSUPP;
981
982 return dev->ethtool_ops->nway_reset(dev);
983 }
984
985 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
986 {
987 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
988
989 if (!dev->ethtool_ops->get_link)
990 return -EOPNOTSUPP;
991
992 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
993
994 if (copy_to_user(useraddr, &edata, sizeof(edata)))
995 return -EFAULT;
996 return 0;
997 }
998
999 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1000 int (*getter)(struct net_device *,
1001 struct ethtool_eeprom *, u8 *),
1002 u32 total_len)
1003 {
1004 struct ethtool_eeprom eeprom;
1005 void __user *userbuf = useraddr + sizeof(eeprom);
1006 u32 bytes_remaining;
1007 u8 *data;
1008 int ret = 0;
1009
1010 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1011 return -EFAULT;
1012
1013 /* Check for wrap and zero */
1014 if (eeprom.offset + eeprom.len <= eeprom.offset)
1015 return -EINVAL;
1016
1017 /* Check for exceeding total eeprom len */
1018 if (eeprom.offset + eeprom.len > total_len)
1019 return -EINVAL;
1020
1021 data = kmalloc(PAGE_SIZE, GFP_USER);
1022 if (!data)
1023 return -ENOMEM;
1024
1025 bytes_remaining = eeprom.len;
1026 while (bytes_remaining > 0) {
1027 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1028
1029 ret = getter(dev, &eeprom, data);
1030 if (ret)
1031 break;
1032 if (copy_to_user(userbuf, data, eeprom.len)) {
1033 ret = -EFAULT;
1034 break;
1035 }
1036 userbuf += eeprom.len;
1037 eeprom.offset += eeprom.len;
1038 bytes_remaining -= eeprom.len;
1039 }
1040
1041 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1042 eeprom.offset -= eeprom.len;
1043 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1044 ret = -EFAULT;
1045
1046 kfree(data);
1047 return ret;
1048 }
1049
1050 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1051 {
1052 const struct ethtool_ops *ops = dev->ethtool_ops;
1053
1054 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1055 !ops->get_eeprom_len(dev))
1056 return -EOPNOTSUPP;
1057
1058 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1059 ops->get_eeprom_len(dev));
1060 }
1061
1062 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1063 {
1064 struct ethtool_eeprom eeprom;
1065 const struct ethtool_ops *ops = dev->ethtool_ops;
1066 void __user *userbuf = useraddr + sizeof(eeprom);
1067 u32 bytes_remaining;
1068 u8 *data;
1069 int ret = 0;
1070
1071 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1072 !ops->get_eeprom_len(dev))
1073 return -EOPNOTSUPP;
1074
1075 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1076 return -EFAULT;
1077
1078 /* Check for wrap and zero */
1079 if (eeprom.offset + eeprom.len <= eeprom.offset)
1080 return -EINVAL;
1081
1082 /* Check for exceeding total eeprom len */
1083 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1084 return -EINVAL;
1085
1086 data = kmalloc(PAGE_SIZE, GFP_USER);
1087 if (!data)
1088 return -ENOMEM;
1089
1090 bytes_remaining = eeprom.len;
1091 while (bytes_remaining > 0) {
1092 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1093
1094 if (copy_from_user(data, userbuf, eeprom.len)) {
1095 ret = -EFAULT;
1096 break;
1097 }
1098 ret = ops->set_eeprom(dev, &eeprom, data);
1099 if (ret)
1100 break;
1101 userbuf += eeprom.len;
1102 eeprom.offset += eeprom.len;
1103 bytes_remaining -= eeprom.len;
1104 }
1105
1106 kfree(data);
1107 return ret;
1108 }
1109
1110 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1111 void __user *useraddr)
1112 {
1113 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1114
1115 if (!dev->ethtool_ops->get_coalesce)
1116 return -EOPNOTSUPP;
1117
1118 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1119
1120 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1121 return -EFAULT;
1122 return 0;
1123 }
1124
1125 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1126 void __user *useraddr)
1127 {
1128 struct ethtool_coalesce coalesce;
1129
1130 if (!dev->ethtool_ops->set_coalesce)
1131 return -EOPNOTSUPP;
1132
1133 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1134 return -EFAULT;
1135
1136 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1137 }
1138
1139 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1140 {
1141 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1142
1143 if (!dev->ethtool_ops->get_ringparam)
1144 return -EOPNOTSUPP;
1145
1146 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1147
1148 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1149 return -EFAULT;
1150 return 0;
1151 }
1152
1153 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1154 {
1155 struct ethtool_ringparam ringparam;
1156
1157 if (!dev->ethtool_ops->set_ringparam)
1158 return -EOPNOTSUPP;
1159
1160 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1161 return -EFAULT;
1162
1163 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1164 }
1165
1166 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1167 void __user *useraddr)
1168 {
1169 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1170
1171 if (!dev->ethtool_ops->get_channels)
1172 return -EOPNOTSUPP;
1173
1174 dev->ethtool_ops->get_channels(dev, &channels);
1175
1176 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1177 return -EFAULT;
1178 return 0;
1179 }
1180
1181 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1182 void __user *useraddr)
1183 {
1184 struct ethtool_channels channels;
1185
1186 if (!dev->ethtool_ops->set_channels)
1187 return -EOPNOTSUPP;
1188
1189 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1190 return -EFAULT;
1191
1192 return dev->ethtool_ops->set_channels(dev, &channels);
1193 }
1194
1195 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1196 {
1197 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1198
1199 if (!dev->ethtool_ops->get_pauseparam)
1200 return -EOPNOTSUPP;
1201
1202 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1203
1204 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1205 return -EFAULT;
1206 return 0;
1207 }
1208
1209 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1210 {
1211 struct ethtool_pauseparam pauseparam;
1212
1213 if (!dev->ethtool_ops->set_pauseparam)
1214 return -EOPNOTSUPP;
1215
1216 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1217 return -EFAULT;
1218
1219 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1220 }
1221
1222 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1223 {
1224 struct ethtool_test test;
1225 const struct ethtool_ops *ops = dev->ethtool_ops;
1226 u64 *data;
1227 int ret, test_len;
1228
1229 if (!ops->self_test || !ops->get_sset_count)
1230 return -EOPNOTSUPP;
1231
1232 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1233 if (test_len < 0)
1234 return test_len;
1235 WARN_ON(test_len == 0);
1236
1237 if (copy_from_user(&test, useraddr, sizeof(test)))
1238 return -EFAULT;
1239
1240 test.len = test_len;
1241 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1242 if (!data)
1243 return -ENOMEM;
1244
1245 ops->self_test(dev, &test, data);
1246
1247 ret = -EFAULT;
1248 if (copy_to_user(useraddr, &test, sizeof(test)))
1249 goto out;
1250 useraddr += sizeof(test);
1251 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1252 goto out;
1253 ret = 0;
1254
1255 out:
1256 kfree(data);
1257 return ret;
1258 }
1259
1260 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1261 {
1262 struct ethtool_gstrings gstrings;
1263 u8 *data;
1264 int ret;
1265
1266 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1267 return -EFAULT;
1268
1269 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1270 if (ret < 0)
1271 return ret;
1272
1273 gstrings.len = ret;
1274
1275 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1276 if (!data)
1277 return -ENOMEM;
1278
1279 __ethtool_get_strings(dev, gstrings.string_set, data);
1280
1281 ret = -EFAULT;
1282 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1283 goto out;
1284 useraddr += sizeof(gstrings);
1285 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1286 goto out;
1287 ret = 0;
1288
1289 out:
1290 kfree(data);
1291 return ret;
1292 }
1293
1294 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1295 {
1296 struct ethtool_value id;
1297 static bool busy;
1298 const struct ethtool_ops *ops = dev->ethtool_ops;
1299 int rc;
1300
1301 if (!ops->set_phys_id)
1302 return -EOPNOTSUPP;
1303
1304 if (busy)
1305 return -EBUSY;
1306
1307 if (copy_from_user(&id, useraddr, sizeof(id)))
1308 return -EFAULT;
1309
1310 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1311 if (rc < 0)
1312 return rc;
1313
1314 /* Drop the RTNL lock while waiting, but prevent reentry or
1315 * removal of the device.
1316 */
1317 busy = true;
1318 dev_hold(dev);
1319 rtnl_unlock();
1320
1321 if (rc == 0) {
1322 /* Driver will handle this itself */
1323 schedule_timeout_interruptible(
1324 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1325 } else {
1326 /* Driver expects to be called at twice the frequency in rc */
1327 int n = rc * 2, i, interval = HZ / n;
1328
1329 /* Count down seconds */
1330 do {
1331 /* Count down iterations per second */
1332 i = n;
1333 do {
1334 rtnl_lock();
1335 rc = ops->set_phys_id(dev,
1336 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1337 rtnl_unlock();
1338 if (rc)
1339 break;
1340 schedule_timeout_interruptible(interval);
1341 } while (!signal_pending(current) && --i != 0);
1342 } while (!signal_pending(current) &&
1343 (id.data == 0 || --id.data != 0));
1344 }
1345
1346 rtnl_lock();
1347 dev_put(dev);
1348 busy = false;
1349
1350 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1351 return rc;
1352 }
1353
1354 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1355 {
1356 struct ethtool_stats stats;
1357 const struct ethtool_ops *ops = dev->ethtool_ops;
1358 u64 *data;
1359 int ret, n_stats;
1360
1361 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1362 return -EOPNOTSUPP;
1363
1364 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1365 if (n_stats < 0)
1366 return n_stats;
1367 WARN_ON(n_stats == 0);
1368
1369 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1370 return -EFAULT;
1371
1372 stats.n_stats = n_stats;
1373 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1374 if (!data)
1375 return -ENOMEM;
1376
1377 ops->get_ethtool_stats(dev, &stats, data);
1378
1379 ret = -EFAULT;
1380 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1381 goto out;
1382 useraddr += sizeof(stats);
1383 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1384 goto out;
1385 ret = 0;
1386
1387 out:
1388 kfree(data);
1389 return ret;
1390 }
1391
1392 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1393 {
1394 struct ethtool_perm_addr epaddr;
1395
1396 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1397 return -EFAULT;
1398
1399 if (epaddr.size < dev->addr_len)
1400 return -ETOOSMALL;
1401 epaddr.size = dev->addr_len;
1402
1403 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1404 return -EFAULT;
1405 useraddr += sizeof(epaddr);
1406 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1407 return -EFAULT;
1408 return 0;
1409 }
1410
1411 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1412 u32 cmd, u32 (*actor)(struct net_device *))
1413 {
1414 struct ethtool_value edata = { .cmd = cmd };
1415
1416 if (!actor)
1417 return -EOPNOTSUPP;
1418
1419 edata.data = actor(dev);
1420
1421 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1422 return -EFAULT;
1423 return 0;
1424 }
1425
1426 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1427 void (*actor)(struct net_device *, u32))
1428 {
1429 struct ethtool_value edata;
1430
1431 if (!actor)
1432 return -EOPNOTSUPP;
1433
1434 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1435 return -EFAULT;
1436
1437 actor(dev, edata.data);
1438 return 0;
1439 }
1440
1441 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1442 int (*actor)(struct net_device *, u32))
1443 {
1444 struct ethtool_value edata;
1445
1446 if (!actor)
1447 return -EOPNOTSUPP;
1448
1449 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1450 return -EFAULT;
1451
1452 return actor(dev, edata.data);
1453 }
1454
1455 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1456 char __user *useraddr)
1457 {
1458 struct ethtool_flash efl;
1459
1460 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1461 return -EFAULT;
1462
1463 if (!dev->ethtool_ops->flash_device)
1464 return -EOPNOTSUPP;
1465
1466 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
1467
1468 return dev->ethtool_ops->flash_device(dev, &efl);
1469 }
1470
1471 static int ethtool_set_dump(struct net_device *dev,
1472 void __user *useraddr)
1473 {
1474 struct ethtool_dump dump;
1475
1476 if (!dev->ethtool_ops->set_dump)
1477 return -EOPNOTSUPP;
1478
1479 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1480 return -EFAULT;
1481
1482 return dev->ethtool_ops->set_dump(dev, &dump);
1483 }
1484
1485 static int ethtool_get_dump_flag(struct net_device *dev,
1486 void __user *useraddr)
1487 {
1488 int ret;
1489 struct ethtool_dump dump;
1490 const struct ethtool_ops *ops = dev->ethtool_ops;
1491
1492 if (!ops->get_dump_flag)
1493 return -EOPNOTSUPP;
1494
1495 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1496 return -EFAULT;
1497
1498 ret = ops->get_dump_flag(dev, &dump);
1499 if (ret)
1500 return ret;
1501
1502 if (copy_to_user(useraddr, &dump, sizeof(dump)))
1503 return -EFAULT;
1504 return 0;
1505 }
1506
1507 static int ethtool_get_dump_data(struct net_device *dev,
1508 void __user *useraddr)
1509 {
1510 int ret;
1511 __u32 len;
1512 struct ethtool_dump dump, tmp;
1513 const struct ethtool_ops *ops = dev->ethtool_ops;
1514 void *data = NULL;
1515
1516 if (!ops->get_dump_data || !ops->get_dump_flag)
1517 return -EOPNOTSUPP;
1518
1519 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1520 return -EFAULT;
1521
1522 memset(&tmp, 0, sizeof(tmp));
1523 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
1524 ret = ops->get_dump_flag(dev, &tmp);
1525 if (ret)
1526 return ret;
1527
1528 len = min(tmp.len, dump.len);
1529 if (!len)
1530 return -EFAULT;
1531
1532 /* Don't ever let the driver think there's more space available
1533 * than it requested with .get_dump_flag().
1534 */
1535 dump.len = len;
1536
1537 /* Always allocate enough space to hold the whole thing so that the
1538 * driver does not need to check the length and bother with partial
1539 * dumping.
1540 */
1541 data = vzalloc(tmp.len);
1542 if (!data)
1543 return -ENOMEM;
1544 ret = ops->get_dump_data(dev, &dump, data);
1545 if (ret)
1546 goto out;
1547
1548 /* There are two sane possibilities:
1549 * 1. The driver's .get_dump_data() does not touch dump.len.
1550 * 2. Or it may set dump.len to how much it really writes, which
1551 * should be tmp.len (or len if it can do a partial dump).
1552 * In any case respond to userspace with the actual length of data
1553 * it's receiving.
1554 */
1555 WARN_ON(dump.len != len && dump.len != tmp.len);
1556 dump.len = len;
1557
1558 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
1559 ret = -EFAULT;
1560 goto out;
1561 }
1562 useraddr += offsetof(struct ethtool_dump, data);
1563 if (copy_to_user(useraddr, data, len))
1564 ret = -EFAULT;
1565 out:
1566 vfree(data);
1567 return ret;
1568 }
1569
1570 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
1571 {
1572 int err = 0;
1573 struct ethtool_ts_info info;
1574 const struct ethtool_ops *ops = dev->ethtool_ops;
1575 struct phy_device *phydev = dev->phydev;
1576
1577 memset(&info, 0, sizeof(info));
1578 info.cmd = ETHTOOL_GET_TS_INFO;
1579
1580 if (phydev && phydev->drv && phydev->drv->ts_info) {
1581 err = phydev->drv->ts_info(phydev, &info);
1582 } else if (ops->get_ts_info) {
1583 err = ops->get_ts_info(dev, &info);
1584 } else {
1585 info.so_timestamping =
1586 SOF_TIMESTAMPING_RX_SOFTWARE |
1587 SOF_TIMESTAMPING_SOFTWARE;
1588 info.phc_index = -1;
1589 }
1590
1591 if (err)
1592 return err;
1593
1594 if (copy_to_user(useraddr, &info, sizeof(info)))
1595 err = -EFAULT;
1596
1597 return err;
1598 }
1599
1600 static int ethtool_get_module_info(struct net_device *dev,
1601 void __user *useraddr)
1602 {
1603 int ret;
1604 struct ethtool_modinfo modinfo;
1605 const struct ethtool_ops *ops = dev->ethtool_ops;
1606
1607 if (!ops->get_module_info)
1608 return -EOPNOTSUPP;
1609
1610 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
1611 return -EFAULT;
1612
1613 ret = ops->get_module_info(dev, &modinfo);
1614 if (ret)
1615 return ret;
1616
1617 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
1618 return -EFAULT;
1619
1620 return 0;
1621 }
1622
1623 static int ethtool_get_module_eeprom(struct net_device *dev,
1624 void __user *useraddr)
1625 {
1626 int ret;
1627 struct ethtool_modinfo modinfo;
1628 const struct ethtool_ops *ops = dev->ethtool_ops;
1629
1630 if (!ops->get_module_info || !ops->get_module_eeprom)
1631 return -EOPNOTSUPP;
1632
1633 ret = ops->get_module_info(dev, &modinfo);
1634 if (ret)
1635 return ret;
1636
1637 return ethtool_get_any_eeprom(dev, useraddr, ops->get_module_eeprom,
1638 modinfo.eeprom_len);
1639 }
1640
1641 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
1642 {
1643 switch (tuna->id) {
1644 case ETHTOOL_RX_COPYBREAK:
1645 case ETHTOOL_TX_COPYBREAK:
1646 if (tuna->len != sizeof(u32) ||
1647 tuna->type_id != ETHTOOL_TUNABLE_U32)
1648 return -EINVAL;
1649 break;
1650 default:
1651 return -EINVAL;
1652 }
1653
1654 return 0;
1655 }
1656
1657 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
1658 {
1659 int ret;
1660 struct ethtool_tunable tuna;
1661 const struct ethtool_ops *ops = dev->ethtool_ops;
1662 void *data;
1663
1664 if (!ops->get_tunable)
1665 return -EOPNOTSUPP;
1666 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
1667 return -EFAULT;
1668 ret = ethtool_tunable_valid(&tuna);
1669 if (ret)
1670 return ret;
1671 data = kmalloc(tuna.len, GFP_USER);
1672 if (!data)
1673 return -ENOMEM;
1674 ret = ops->get_tunable(dev, &tuna, data);
1675 if (ret)
1676 goto out;
1677 useraddr += sizeof(tuna);
1678 ret = -EFAULT;
1679 if (copy_to_user(useraddr, data, tuna.len))
1680 goto out;
1681 ret = 0;
1682
1683 out:
1684 kfree(data);
1685 return ret;
1686 }
1687
1688 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
1689 {
1690 int ret;
1691 struct ethtool_tunable tuna;
1692 const struct ethtool_ops *ops = dev->ethtool_ops;
1693 void *data;
1694
1695 if (!ops->set_tunable)
1696 return -EOPNOTSUPP;
1697 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
1698 return -EFAULT;
1699 ret = ethtool_tunable_valid(&tuna);
1700 if (ret)
1701 return ret;
1702 data = kmalloc(tuna.len, GFP_USER);
1703 if (!data)
1704 return -ENOMEM;
1705 useraddr += sizeof(tuna);
1706 ret = -EFAULT;
1707 if (copy_from_user(data, useraddr, tuna.len))
1708 goto out;
1709 ret = ops->set_tunable(dev, &tuna, data);
1710
1711 out:
1712 kfree(data);
1713 return ret;
1714 }
1715
1716 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
1717
1718 int dev_ethtool(struct net *net, struct ifreq *ifr)
1719 {
1720 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1721 void __user *useraddr = ifr->ifr_data;
1722 u32 ethcmd;
1723 int rc;
1724 netdev_features_t old_features;
1725
1726 if (!dev || !netif_device_present(dev))
1727 return -ENODEV;
1728
1729 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1730 return -EFAULT;
1731
1732 /* Allow some commands to be done by anyone */
1733 switch (ethcmd) {
1734 case ETHTOOL_GSET:
1735 case ETHTOOL_GDRVINFO:
1736 case ETHTOOL_GMSGLVL:
1737 case ETHTOOL_GLINK:
1738 case ETHTOOL_GCOALESCE:
1739 case ETHTOOL_GRINGPARAM:
1740 case ETHTOOL_GPAUSEPARAM:
1741 case ETHTOOL_GRXCSUM:
1742 case ETHTOOL_GTXCSUM:
1743 case ETHTOOL_GSG:
1744 case ETHTOOL_GSSET_INFO:
1745 case ETHTOOL_GSTRINGS:
1746 case ETHTOOL_GSTATS:
1747 case ETHTOOL_GTSO:
1748 case ETHTOOL_GPERMADDR:
1749 case ETHTOOL_GUFO:
1750 case ETHTOOL_GGSO:
1751 case ETHTOOL_GGRO:
1752 case ETHTOOL_GFLAGS:
1753 case ETHTOOL_GPFLAGS:
1754 case ETHTOOL_GRXFH:
1755 case ETHTOOL_GRXRINGS:
1756 case ETHTOOL_GRXCLSRLCNT:
1757 case ETHTOOL_GRXCLSRULE:
1758 case ETHTOOL_GRXCLSRLALL:
1759 case ETHTOOL_GRXFHINDIR:
1760 case ETHTOOL_GRSSH:
1761 case ETHTOOL_GFEATURES:
1762 case ETHTOOL_GCHANNELS:
1763 case ETHTOOL_GET_TS_INFO:
1764 case ETHTOOL_GEEE:
1765 case ETHTOOL_GTUNABLE:
1766 break;
1767 default:
1768 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1769 return -EPERM;
1770 }
1771
1772 if (dev->ethtool_ops->begin) {
1773 rc = dev->ethtool_ops->begin(dev);
1774 if (rc < 0)
1775 return rc;
1776 }
1777 old_features = dev->features;
1778
1779 switch (ethcmd) {
1780 case ETHTOOL_GSET:
1781 rc = ethtool_get_settings(dev, useraddr);
1782 break;
1783 case ETHTOOL_SSET:
1784 rc = ethtool_set_settings(dev, useraddr);
1785 break;
1786 case ETHTOOL_GDRVINFO:
1787 rc = ethtool_get_drvinfo(dev, useraddr);
1788 break;
1789 case ETHTOOL_GREGS:
1790 rc = ethtool_get_regs(dev, useraddr);
1791 break;
1792 case ETHTOOL_GWOL:
1793 rc = ethtool_get_wol(dev, useraddr);
1794 break;
1795 case ETHTOOL_SWOL:
1796 rc = ethtool_set_wol(dev, useraddr);
1797 break;
1798 case ETHTOOL_GMSGLVL:
1799 rc = ethtool_get_value(dev, useraddr, ethcmd,
1800 dev->ethtool_ops->get_msglevel);
1801 break;
1802 case ETHTOOL_SMSGLVL:
1803 rc = ethtool_set_value_void(dev, useraddr,
1804 dev->ethtool_ops->set_msglevel);
1805 break;
1806 case ETHTOOL_GEEE:
1807 rc = ethtool_get_eee(dev, useraddr);
1808 break;
1809 case ETHTOOL_SEEE:
1810 rc = ethtool_set_eee(dev, useraddr);
1811 break;
1812 case ETHTOOL_NWAY_RST:
1813 rc = ethtool_nway_reset(dev);
1814 break;
1815 case ETHTOOL_GLINK:
1816 rc = ethtool_get_link(dev, useraddr);
1817 break;
1818 case ETHTOOL_GEEPROM:
1819 rc = ethtool_get_eeprom(dev, useraddr);
1820 break;
1821 case ETHTOOL_SEEPROM:
1822 rc = ethtool_set_eeprom(dev, useraddr);
1823 break;
1824 case ETHTOOL_GCOALESCE:
1825 rc = ethtool_get_coalesce(dev, useraddr);
1826 break;
1827 case ETHTOOL_SCOALESCE:
1828 rc = ethtool_set_coalesce(dev, useraddr);
1829 break;
1830 case ETHTOOL_GRINGPARAM:
1831 rc = ethtool_get_ringparam(dev, useraddr);
1832 break;
1833 case ETHTOOL_SRINGPARAM:
1834 rc = ethtool_set_ringparam(dev, useraddr);
1835 break;
1836 case ETHTOOL_GPAUSEPARAM:
1837 rc = ethtool_get_pauseparam(dev, useraddr);
1838 break;
1839 case ETHTOOL_SPAUSEPARAM:
1840 rc = ethtool_set_pauseparam(dev, useraddr);
1841 break;
1842 case ETHTOOL_TEST:
1843 rc = ethtool_self_test(dev, useraddr);
1844 break;
1845 case ETHTOOL_GSTRINGS:
1846 rc = ethtool_get_strings(dev, useraddr);
1847 break;
1848 case ETHTOOL_PHYS_ID:
1849 rc = ethtool_phys_id(dev, useraddr);
1850 break;
1851 case ETHTOOL_GSTATS:
1852 rc = ethtool_get_stats(dev, useraddr);
1853 break;
1854 case ETHTOOL_GPERMADDR:
1855 rc = ethtool_get_perm_addr(dev, useraddr);
1856 break;
1857 case ETHTOOL_GFLAGS:
1858 rc = ethtool_get_value(dev, useraddr, ethcmd,
1859 __ethtool_get_flags);
1860 break;
1861 case ETHTOOL_SFLAGS:
1862 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
1863 break;
1864 case ETHTOOL_GPFLAGS:
1865 rc = ethtool_get_value(dev, useraddr, ethcmd,
1866 dev->ethtool_ops->get_priv_flags);
1867 break;
1868 case ETHTOOL_SPFLAGS:
1869 rc = ethtool_set_value(dev, useraddr,
1870 dev->ethtool_ops->set_priv_flags);
1871 break;
1872 case ETHTOOL_GRXFH:
1873 case ETHTOOL_GRXRINGS:
1874 case ETHTOOL_GRXCLSRLCNT:
1875 case ETHTOOL_GRXCLSRULE:
1876 case ETHTOOL_GRXCLSRLALL:
1877 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1878 break;
1879 case ETHTOOL_SRXFH:
1880 case ETHTOOL_SRXCLSRLDEL:
1881 case ETHTOOL_SRXCLSRLINS:
1882 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1883 break;
1884 case ETHTOOL_FLASHDEV:
1885 rc = ethtool_flash_device(dev, useraddr);
1886 break;
1887 case ETHTOOL_RESET:
1888 rc = ethtool_reset(dev, useraddr);
1889 break;
1890 case ETHTOOL_GSSET_INFO:
1891 rc = ethtool_get_sset_info(dev, useraddr);
1892 break;
1893 case ETHTOOL_GRXFHINDIR:
1894 rc = ethtool_get_rxfh_indir(dev, useraddr);
1895 break;
1896 case ETHTOOL_SRXFHINDIR:
1897 rc = ethtool_set_rxfh_indir(dev, useraddr);
1898 break;
1899 case ETHTOOL_GRSSH:
1900 rc = ethtool_get_rxfh(dev, useraddr);
1901 break;
1902 case ETHTOOL_SRSSH:
1903 rc = ethtool_set_rxfh(dev, useraddr);
1904 break;
1905 case ETHTOOL_GFEATURES:
1906 rc = ethtool_get_features(dev, useraddr);
1907 break;
1908 case ETHTOOL_SFEATURES:
1909 rc = ethtool_set_features(dev, useraddr);
1910 break;
1911 case ETHTOOL_GTXCSUM:
1912 case ETHTOOL_GRXCSUM:
1913 case ETHTOOL_GSG:
1914 case ETHTOOL_GTSO:
1915 case ETHTOOL_GUFO:
1916 case ETHTOOL_GGSO:
1917 case ETHTOOL_GGRO:
1918 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
1919 break;
1920 case ETHTOOL_STXCSUM:
1921 case ETHTOOL_SRXCSUM:
1922 case ETHTOOL_SSG:
1923 case ETHTOOL_STSO:
1924 case ETHTOOL_SUFO:
1925 case ETHTOOL_SGSO:
1926 case ETHTOOL_SGRO:
1927 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
1928 break;
1929 case ETHTOOL_GCHANNELS:
1930 rc = ethtool_get_channels(dev, useraddr);
1931 break;
1932 case ETHTOOL_SCHANNELS:
1933 rc = ethtool_set_channels(dev, useraddr);
1934 break;
1935 case ETHTOOL_SET_DUMP:
1936 rc = ethtool_set_dump(dev, useraddr);
1937 break;
1938 case ETHTOOL_GET_DUMP_FLAG:
1939 rc = ethtool_get_dump_flag(dev, useraddr);
1940 break;
1941 case ETHTOOL_GET_DUMP_DATA:
1942 rc = ethtool_get_dump_data(dev, useraddr);
1943 break;
1944 case ETHTOOL_GET_TS_INFO:
1945 rc = ethtool_get_ts_info(dev, useraddr);
1946 break;
1947 case ETHTOOL_GMODULEINFO:
1948 rc = ethtool_get_module_info(dev, useraddr);
1949 break;
1950 case ETHTOOL_GMODULEEEPROM:
1951 rc = ethtool_get_module_eeprom(dev, useraddr);
1952 break;
1953 case ETHTOOL_GTUNABLE:
1954 rc = ethtool_get_tunable(dev, useraddr);
1955 break;
1956 case ETHTOOL_STUNABLE:
1957 rc = ethtool_set_tunable(dev, useraddr);
1958 break;
1959 default:
1960 rc = -EOPNOTSUPP;
1961 }
1962
1963 if (dev->ethtool_ops->complete)
1964 dev->ethtool_ops->complete(dev);
1965
1966 if (old_features != dev->features)
1967 netdev_features_change(dev);
1968
1969 return rc;
1970 }
Linux with added FPC-III support