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