2 * net/core/ethtool.c - Ethtool ioctl handler
3 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
5 * This file is where we call all the ethtool_ops commands to get
6 * the information ethtool needs.
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.
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>
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.
35 u32 ethtool_op_get_link(struct net_device *dev)
37 return netif_carrier_ok(dev) ? 1 : 0;
39 EXPORT_SYMBOL(ethtool_op_get_link);
41 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
43 info->so_timestamping =
44 SOF_TIMESTAMPING_TX_SOFTWARE |
45 SOF_TIMESTAMPING_RX_SOFTWARE |
46 SOF_TIMESTAMPING_SOFTWARE;
50 EXPORT_SYMBOL(ethtool_op_get_ts_info);
52 /* Handlers for each ethtool command */
54 #define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
56 static 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_TX_BIT] = "tx-vlan-hw-insert",
65 [NETIF_F_HW_VLAN_RX_BIT] = "rx-vlan-hw-parse",
66 [NETIF_F_HW_VLAN_FILTER_BIT] = "rx-vlan-filter",
67 [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged",
68 [NETIF_F_GSO_BIT] = "tx-generic-segmentation",
69 [NETIF_F_LLTX_BIT] = "tx-lockless",
70 [NETIF_F_NETNS_LOCAL_BIT] = "netns-local",
71 [NETIF_F_GRO_BIT] = "rx-gro",
72 [NETIF_F_LRO_BIT] = "rx-lro",
74 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation",
75 [NETIF_F_UFO_BIT] = "tx-udp-fragmentation",
76 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
77 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
78 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
79 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
81 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
82 [NETIF_F_SCTP_CSUM_BIT] = "tx-checksum-sctp",
83 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
84 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
85 [NETIF_F_RXHASH_BIT] = "rx-hashing",
86 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
87 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
88 [NETIF_F_LOOPBACK_BIT] = "loopback",
89 [NETIF_F_RXFCS_BIT] = "rx-fcs",
90 [NETIF_F_RXALL_BIT] = "rx-all",
93 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
95 struct ethtool_gfeatures cmd = {
96 .cmd = ETHTOOL_GFEATURES,
97 .size = ETHTOOL_DEV_FEATURE_WORDS,
99 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
100 u32 __user *sizeaddr;
104 /* in case feature bits run out again */
105 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
107 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
108 features[i].available = (u32)(dev->hw_features >> (32 * i));
109 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
110 features[i].active = (u32)(dev->features >> (32 * i));
111 features[i].never_changed =
112 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
115 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
116 if (get_user(copy_size, sizeaddr))
119 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
120 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
122 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
124 useraddr += sizeof(cmd);
125 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
131 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
133 struct ethtool_sfeatures cmd;
134 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
135 netdev_features_t wanted = 0, valid = 0;
138 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
140 useraddr += sizeof(cmd);
142 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
145 if (copy_from_user(features, useraddr, sizeof(features)))
148 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
149 valid |= (netdev_features_t)features[i].valid << (32 * i);
150 wanted |= (netdev_features_t)features[i].requested << (32 * i);
153 if (valid & ~NETIF_F_ETHTOOL_BITS)
156 if (valid & ~dev->hw_features) {
157 valid &= dev->hw_features;
158 ret |= ETHTOOL_F_UNSUPPORTED;
161 dev->wanted_features &= ~valid;
162 dev->wanted_features |= wanted & valid;
163 __netdev_update_features(dev);
165 if ((dev->wanted_features ^ dev->features) & valid)
166 ret |= ETHTOOL_F_WISH;
171 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
173 const struct ethtool_ops *ops = dev->ethtool_ops;
175 if (sset == ETH_SS_FEATURES)
176 return ARRAY_SIZE(netdev_features_strings);
178 if (ops && ops->get_sset_count && ops->get_strings)
179 return ops->get_sset_count(dev, sset);
184 static void __ethtool_get_strings(struct net_device *dev,
185 u32 stringset, u8 *data)
187 const struct ethtool_ops *ops = dev->ethtool_ops;
189 if (stringset == ETH_SS_FEATURES)
190 memcpy(data, netdev_features_strings,
191 sizeof(netdev_features_strings));
193 /* ops->get_strings is valid because checked earlier */
194 ops->get_strings(dev, stringset, data);
197 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
199 /* feature masks of legacy discrete ethtool ops */
202 case ETHTOOL_GTXCSUM:
203 case ETHTOOL_STXCSUM:
204 return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM;
205 case ETHTOOL_GRXCSUM:
206 case ETHTOOL_SRXCSUM:
207 return NETIF_F_RXCSUM;
213 return NETIF_F_ALL_TSO;
228 static int ethtool_get_one_feature(struct net_device *dev,
229 char __user *useraddr, u32 ethcmd)
231 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
232 struct ethtool_value edata = {
234 .data = !!(dev->features & mask),
237 if (copy_to_user(useraddr, &edata, sizeof(edata)))
242 static int ethtool_set_one_feature(struct net_device *dev,
243 void __user *useraddr, u32 ethcmd)
245 struct ethtool_value edata;
246 netdev_features_t mask;
248 if (copy_from_user(&edata, useraddr, sizeof(edata)))
251 mask = ethtool_get_feature_mask(ethcmd);
252 mask &= dev->hw_features;
257 dev->wanted_features |= mask;
259 dev->wanted_features &= ~mask;
261 __netdev_update_features(dev);
266 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
267 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
268 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_RX | \
269 NETIF_F_HW_VLAN_TX | NETIF_F_NTUPLE | NETIF_F_RXHASH)
271 static u32 __ethtool_get_flags(struct net_device *dev)
275 if (dev->features & NETIF_F_LRO) flags |= ETH_FLAG_LRO;
276 if (dev->features & NETIF_F_HW_VLAN_RX) flags |= ETH_FLAG_RXVLAN;
277 if (dev->features & NETIF_F_HW_VLAN_TX) flags |= ETH_FLAG_TXVLAN;
278 if (dev->features & NETIF_F_NTUPLE) flags |= ETH_FLAG_NTUPLE;
279 if (dev->features & NETIF_F_RXHASH) flags |= ETH_FLAG_RXHASH;
284 static int __ethtool_set_flags(struct net_device *dev, u32 data)
286 netdev_features_t features = 0, changed;
288 if (data & ~ETH_ALL_FLAGS)
291 if (data & ETH_FLAG_LRO) features |= NETIF_F_LRO;
292 if (data & ETH_FLAG_RXVLAN) features |= NETIF_F_HW_VLAN_RX;
293 if (data & ETH_FLAG_TXVLAN) features |= NETIF_F_HW_VLAN_TX;
294 if (data & ETH_FLAG_NTUPLE) features |= NETIF_F_NTUPLE;
295 if (data & ETH_FLAG_RXHASH) features |= NETIF_F_RXHASH;
297 /* allow changing only bits set in hw_features */
298 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
299 if (changed & ~dev->hw_features)
300 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
302 dev->wanted_features =
303 (dev->wanted_features & ~changed) | (features & changed);
305 __netdev_update_features(dev);
310 int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
314 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
317 memset(cmd, 0, sizeof(struct ethtool_cmd));
318 cmd->cmd = ETHTOOL_GSET;
319 return dev->ethtool_ops->get_settings(dev, cmd);
321 EXPORT_SYMBOL(__ethtool_get_settings);
323 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
326 struct ethtool_cmd cmd;
328 err = __ethtool_get_settings(dev, &cmd);
332 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
337 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
339 struct ethtool_cmd cmd;
341 if (!dev->ethtool_ops->set_settings)
344 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
347 return dev->ethtool_ops->set_settings(dev, &cmd);
350 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
351 void __user *useraddr)
353 struct ethtool_drvinfo info;
354 const struct ethtool_ops *ops = dev->ethtool_ops;
356 memset(&info, 0, sizeof(info));
357 info.cmd = ETHTOOL_GDRVINFO;
358 if (ops && ops->get_drvinfo) {
359 ops->get_drvinfo(dev, &info);
360 } else if (dev->dev.parent && dev->dev.parent->driver) {
361 strlcpy(info.bus_info, dev_name(dev->dev.parent),
362 sizeof(info.bus_info));
363 strlcpy(info.driver, dev->dev.parent->driver->name,
364 sizeof(info.driver));
370 * this method of obtaining string set info is deprecated;
371 * Use ETHTOOL_GSSET_INFO instead.
373 if (ops && ops->get_sset_count) {
376 rc = ops->get_sset_count(dev, ETH_SS_TEST);
378 info.testinfo_len = rc;
379 rc = ops->get_sset_count(dev, ETH_SS_STATS);
382 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
384 info.n_priv_flags = rc;
386 if (ops && ops->get_regs_len)
387 info.regdump_len = ops->get_regs_len(dev);
388 if (ops && ops->get_eeprom_len)
389 info.eedump_len = ops->get_eeprom_len(dev);
391 if (copy_to_user(useraddr, &info, sizeof(info)))
396 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
397 void __user *useraddr)
399 struct ethtool_sset_info info;
401 int i, idx = 0, n_bits = 0, ret, rc;
402 u32 *info_buf = NULL;
404 if (copy_from_user(&info, useraddr, sizeof(info)))
407 /* store copy of mask, because we zero struct later on */
408 sset_mask = info.sset_mask;
412 /* calculate size of return buffer */
413 n_bits = hweight64(sset_mask);
415 memset(&info, 0, sizeof(info));
416 info.cmd = ETHTOOL_GSSET_INFO;
418 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
423 * fill return buffer based on input bitmask and successful
424 * get_sset_count return
426 for (i = 0; i < 64; i++) {
427 if (!(sset_mask & (1ULL << i)))
430 rc = __ethtool_get_sset_count(dev, i);
432 info.sset_mask |= (1ULL << i);
433 info_buf[idx++] = rc;
438 if (copy_to_user(useraddr, &info, sizeof(info)))
441 useraddr += offsetof(struct ethtool_sset_info, data);
442 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
452 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
453 u32 cmd, void __user *useraddr)
455 struct ethtool_rxnfc info;
456 size_t info_size = sizeof(info);
459 if (!dev->ethtool_ops->set_rxnfc)
462 /* struct ethtool_rxnfc was originally defined for
463 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
464 * members. User-space might still be using that
466 if (cmd == ETHTOOL_SRXFH)
467 info_size = (offsetof(struct ethtool_rxnfc, data) +
470 if (copy_from_user(&info, useraddr, info_size))
473 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
477 if (cmd == ETHTOOL_SRXCLSRLINS &&
478 copy_to_user(useraddr, &info, info_size))
484 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
485 u32 cmd, void __user *useraddr)
487 struct ethtool_rxnfc info;
488 size_t info_size = sizeof(info);
489 const struct ethtool_ops *ops = dev->ethtool_ops;
491 void *rule_buf = NULL;
496 /* struct ethtool_rxnfc was originally defined for
497 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
498 * members. User-space might still be using that
500 if (cmd == ETHTOOL_GRXFH)
501 info_size = (offsetof(struct ethtool_rxnfc, data) +
504 if (copy_from_user(&info, useraddr, info_size))
507 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
508 if (info.rule_cnt > 0) {
509 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
510 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
517 ret = ops->get_rxnfc(dev, &info, rule_buf);
522 if (copy_to_user(useraddr, &info, info_size))
526 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
527 if (copy_to_user(useraddr, rule_buf,
528 info.rule_cnt * sizeof(u32)))
539 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
540 void __user *useraddr)
542 u32 user_size, dev_size;
546 if (!dev->ethtool_ops->get_rxfh_indir_size ||
547 !dev->ethtool_ops->get_rxfh_indir)
549 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
553 if (copy_from_user(&user_size,
554 useraddr + offsetof(struct ethtool_rxfh_indir, size),
558 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
559 &dev_size, sizeof(dev_size)))
562 /* If the user buffer size is 0, this is just a query for the
563 * device table size. Otherwise, if it's smaller than the
564 * device table size it's an error.
566 if (user_size < dev_size)
567 return user_size == 0 ? 0 : -EINVAL;
569 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
573 ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
577 if (copy_to_user(useraddr +
578 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
579 indir, dev_size * sizeof(indir[0])))
587 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
588 void __user *useraddr)
590 struct ethtool_rxnfc rx_rings;
591 u32 user_size, dev_size, i;
595 if (!dev->ethtool_ops->get_rxfh_indir_size ||
596 !dev->ethtool_ops->set_rxfh_indir ||
597 !dev->ethtool_ops->get_rxnfc)
599 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
603 if (copy_from_user(&user_size,
604 useraddr + offsetof(struct ethtool_rxfh_indir, size),
608 if (user_size != 0 && user_size != dev_size)
611 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
615 rx_rings.cmd = ETHTOOL_GRXRINGS;
616 ret = dev->ethtool_ops->get_rxnfc(dev, &rx_rings, NULL);
620 if (user_size == 0) {
621 for (i = 0; i < dev_size; i++)
622 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
624 if (copy_from_user(indir,
626 offsetof(struct ethtool_rxfh_indir,
628 dev_size * sizeof(indir[0]))) {
633 /* Validate ring indices */
634 for (i = 0; i < dev_size; i++) {
635 if (indir[i] >= rx_rings.data) {
642 ret = dev->ethtool_ops->set_rxfh_indir(dev, indir);
649 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
651 struct ethtool_regs regs;
652 const struct ethtool_ops *ops = dev->ethtool_ops;
656 if (!ops->get_regs || !ops->get_regs_len)
659 if (copy_from_user(®s, useraddr, sizeof(regs)))
662 reglen = ops->get_regs_len(dev);
663 if (regs.len > reglen)
666 regbuf = vzalloc(reglen);
667 if (reglen && !regbuf)
670 ops->get_regs(dev, ®s, regbuf);
673 if (copy_to_user(useraddr, ®s, sizeof(regs)))
675 useraddr += offsetof(struct ethtool_regs, data);
676 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
685 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
687 struct ethtool_value reset;
690 if (!dev->ethtool_ops->reset)
693 if (copy_from_user(&reset, useraddr, sizeof(reset)))
696 ret = dev->ethtool_ops->reset(dev, &reset.data);
700 if (copy_to_user(useraddr, &reset, sizeof(reset)))
705 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
707 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
709 if (!dev->ethtool_ops->get_wol)
712 dev->ethtool_ops->get_wol(dev, &wol);
714 if (copy_to_user(useraddr, &wol, sizeof(wol)))
719 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
721 struct ethtool_wolinfo wol;
723 if (!dev->ethtool_ops->set_wol)
726 if (copy_from_user(&wol, useraddr, sizeof(wol)))
729 return dev->ethtool_ops->set_wol(dev, &wol);
732 static int ethtool_nway_reset(struct net_device *dev)
734 if (!dev->ethtool_ops->nway_reset)
737 return dev->ethtool_ops->nway_reset(dev);
740 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
742 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
744 if (!dev->ethtool_ops->get_link)
747 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
749 if (copy_to_user(useraddr, &edata, sizeof(edata)))
754 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
756 struct ethtool_eeprom eeprom;
757 const struct ethtool_ops *ops = dev->ethtool_ops;
758 void __user *userbuf = useraddr + sizeof(eeprom);
763 if (!ops->get_eeprom || !ops->get_eeprom_len)
766 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
769 /* Check for wrap and zero */
770 if (eeprom.offset + eeprom.len <= eeprom.offset)
773 /* Check for exceeding total eeprom len */
774 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
777 data = kmalloc(PAGE_SIZE, GFP_USER);
781 bytes_remaining = eeprom.len;
782 while (bytes_remaining > 0) {
783 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
785 ret = ops->get_eeprom(dev, &eeprom, data);
788 if (copy_to_user(userbuf, data, eeprom.len)) {
792 userbuf += eeprom.len;
793 eeprom.offset += eeprom.len;
794 bytes_remaining -= eeprom.len;
797 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
798 eeprom.offset -= eeprom.len;
799 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
806 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
808 struct ethtool_eeprom eeprom;
809 const struct ethtool_ops *ops = dev->ethtool_ops;
810 void __user *userbuf = useraddr + sizeof(eeprom);
815 if (!ops->set_eeprom || !ops->get_eeprom_len)
818 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
821 /* Check for wrap and zero */
822 if (eeprom.offset + eeprom.len <= eeprom.offset)
825 /* Check for exceeding total eeprom len */
826 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
829 data = kmalloc(PAGE_SIZE, GFP_USER);
833 bytes_remaining = eeprom.len;
834 while (bytes_remaining > 0) {
835 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
837 if (copy_from_user(data, userbuf, eeprom.len)) {
841 ret = ops->set_eeprom(dev, &eeprom, data);
844 userbuf += eeprom.len;
845 eeprom.offset += eeprom.len;
846 bytes_remaining -= eeprom.len;
853 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
854 void __user *useraddr)
856 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
858 if (!dev->ethtool_ops->get_coalesce)
861 dev->ethtool_ops->get_coalesce(dev, &coalesce);
863 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
868 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
869 void __user *useraddr)
871 struct ethtool_coalesce coalesce;
873 if (!dev->ethtool_ops->set_coalesce)
876 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
879 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
882 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
884 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
886 if (!dev->ethtool_ops->get_ringparam)
889 dev->ethtool_ops->get_ringparam(dev, &ringparam);
891 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
896 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
898 struct ethtool_ringparam ringparam;
900 if (!dev->ethtool_ops->set_ringparam)
903 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
906 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
909 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
910 void __user *useraddr)
912 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
914 if (!dev->ethtool_ops->get_channels)
917 dev->ethtool_ops->get_channels(dev, &channels);
919 if (copy_to_user(useraddr, &channels, sizeof(channels)))
924 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
925 void __user *useraddr)
927 struct ethtool_channels channels;
929 if (!dev->ethtool_ops->set_channels)
932 if (copy_from_user(&channels, useraddr, sizeof(channels)))
935 return dev->ethtool_ops->set_channels(dev, &channels);
938 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
940 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
942 if (!dev->ethtool_ops->get_pauseparam)
945 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
947 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
952 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
954 struct ethtool_pauseparam pauseparam;
956 if (!dev->ethtool_ops->set_pauseparam)
959 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
962 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
965 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
967 struct ethtool_test test;
968 const struct ethtool_ops *ops = dev->ethtool_ops;
972 if (!ops->self_test || !ops->get_sset_count)
975 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
978 WARN_ON(test_len == 0);
980 if (copy_from_user(&test, useraddr, sizeof(test)))
984 data = kmalloc(test_len * sizeof(u64), GFP_USER);
988 ops->self_test(dev, &test, data);
991 if (copy_to_user(useraddr, &test, sizeof(test)))
993 useraddr += sizeof(test);
994 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1003 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1005 struct ethtool_gstrings gstrings;
1009 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1012 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1018 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1022 __ethtool_get_strings(dev, gstrings.string_set, data);
1025 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1027 useraddr += sizeof(gstrings);
1028 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1037 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1039 struct ethtool_value id;
1043 if (!dev->ethtool_ops->set_phys_id)
1049 if (copy_from_user(&id, useraddr, sizeof(id)))
1052 rc = dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1056 /* Drop the RTNL lock while waiting, but prevent reentry or
1057 * removal of the device.
1064 /* Driver will handle this itself */
1065 schedule_timeout_interruptible(
1066 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1068 /* Driver expects to be called at twice the frequency in rc */
1069 int n = rc * 2, i, interval = HZ / n;
1071 /* Count down seconds */
1073 /* Count down iterations per second */
1077 rc = dev->ethtool_ops->set_phys_id(dev,
1078 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1082 schedule_timeout_interruptible(interval);
1083 } while (!signal_pending(current) && --i != 0);
1084 } while (!signal_pending(current) &&
1085 (id.data == 0 || --id.data != 0));
1092 (void)dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1096 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1098 struct ethtool_stats stats;
1099 const struct ethtool_ops *ops = dev->ethtool_ops;
1103 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1106 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1109 WARN_ON(n_stats == 0);
1111 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1114 stats.n_stats = n_stats;
1115 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1119 ops->get_ethtool_stats(dev, &stats, data);
1122 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1124 useraddr += sizeof(stats);
1125 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1134 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1136 struct ethtool_perm_addr epaddr;
1138 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1141 if (epaddr.size < dev->addr_len)
1143 epaddr.size = dev->addr_len;
1145 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1147 useraddr += sizeof(epaddr);
1148 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1153 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1154 u32 cmd, u32 (*actor)(struct net_device *))
1156 struct ethtool_value edata = { .cmd = cmd };
1161 edata.data = actor(dev);
1163 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1168 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1169 void (*actor)(struct net_device *, u32))
1171 struct ethtool_value edata;
1176 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1179 actor(dev, edata.data);
1183 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1184 int (*actor)(struct net_device *, u32))
1186 struct ethtool_value edata;
1191 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1194 return actor(dev, edata.data);
1197 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1198 char __user *useraddr)
1200 struct ethtool_flash efl;
1202 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1205 if (!dev->ethtool_ops->flash_device)
1208 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
1210 return dev->ethtool_ops->flash_device(dev, &efl);
1213 static int ethtool_set_dump(struct net_device *dev,
1214 void __user *useraddr)
1216 struct ethtool_dump dump;
1218 if (!dev->ethtool_ops->set_dump)
1221 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1224 return dev->ethtool_ops->set_dump(dev, &dump);
1227 static int ethtool_get_dump_flag(struct net_device *dev,
1228 void __user *useraddr)
1231 struct ethtool_dump dump;
1232 const struct ethtool_ops *ops = dev->ethtool_ops;
1234 if (!dev->ethtool_ops->get_dump_flag)
1237 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1240 ret = ops->get_dump_flag(dev, &dump);
1244 if (copy_to_user(useraddr, &dump, sizeof(dump)))
1249 static int ethtool_get_dump_data(struct net_device *dev,
1250 void __user *useraddr)
1254 struct ethtool_dump dump, tmp;
1255 const struct ethtool_ops *ops = dev->ethtool_ops;
1258 if (!dev->ethtool_ops->get_dump_data ||
1259 !dev->ethtool_ops->get_dump_flag)
1262 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1265 memset(&tmp, 0, sizeof(tmp));
1266 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
1267 ret = ops->get_dump_flag(dev, &tmp);
1271 len = (tmp.len > dump.len) ? dump.len : tmp.len;
1275 data = vzalloc(tmp.len);
1278 ret = ops->get_dump_data(dev, &dump, data);
1282 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
1286 useraddr += offsetof(struct ethtool_dump, data);
1287 if (copy_to_user(useraddr, data, len))
1294 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
1297 struct ethtool_ts_info info;
1298 const struct ethtool_ops *ops = dev->ethtool_ops;
1299 struct phy_device *phydev = dev->phydev;
1301 memset(&info, 0, sizeof(info));
1302 info.cmd = ETHTOOL_GET_TS_INFO;
1304 if (phydev && phydev->drv && phydev->drv->ts_info) {
1306 err = phydev->drv->ts_info(phydev, &info);
1308 } else if (dev->ethtool_ops && dev->ethtool_ops->get_ts_info) {
1310 err = ops->get_ts_info(dev, &info);
1313 info.so_timestamping =
1314 SOF_TIMESTAMPING_RX_SOFTWARE |
1315 SOF_TIMESTAMPING_SOFTWARE;
1316 info.phc_index = -1;
1322 if (copy_to_user(useraddr, &info, sizeof(info)))
1328 /* The main entry point in this file. Called from net/core/dev.c */
1330 int dev_ethtool(struct net *net, struct ifreq *ifr)
1332 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1333 void __user *useraddr = ifr->ifr_data;
1338 if (!dev || !netif_device_present(dev))
1341 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
1344 if (!dev->ethtool_ops) {
1345 /* A few commands do not require any driver support,
1346 * are unprivileged, and do not change anything, so we
1347 * can take a shortcut to them. */
1348 if (ethcmd == ETHTOOL_GDRVINFO)
1349 return ethtool_get_drvinfo(dev, useraddr);
1350 else if (ethcmd == ETHTOOL_GET_TS_INFO)
1351 return ethtool_get_ts_info(dev, useraddr);
1356 /* Allow some commands to be done by anyone */
1359 case ETHTOOL_GDRVINFO:
1360 case ETHTOOL_GMSGLVL:
1361 case ETHTOOL_GCOALESCE:
1362 case ETHTOOL_GRINGPARAM:
1363 case ETHTOOL_GPAUSEPARAM:
1364 case ETHTOOL_GRXCSUM:
1365 case ETHTOOL_GTXCSUM:
1367 case ETHTOOL_GSSET_INFO:
1368 case ETHTOOL_GSTRINGS:
1370 case ETHTOOL_GPERMADDR:
1374 case ETHTOOL_GFLAGS:
1375 case ETHTOOL_GPFLAGS:
1377 case ETHTOOL_GRXRINGS:
1378 case ETHTOOL_GRXCLSRLCNT:
1379 case ETHTOOL_GRXCLSRULE:
1380 case ETHTOOL_GRXCLSRLALL:
1381 case ETHTOOL_GFEATURES:
1382 case ETHTOOL_GET_TS_INFO:
1385 if (!capable(CAP_NET_ADMIN))
1389 if (dev->ethtool_ops->begin) {
1390 rc = dev->ethtool_ops->begin(dev);
1394 old_features = dev->features;
1398 rc = ethtool_get_settings(dev, useraddr);
1401 rc = ethtool_set_settings(dev, useraddr);
1403 case ETHTOOL_GDRVINFO:
1404 rc = ethtool_get_drvinfo(dev, useraddr);
1407 rc = ethtool_get_regs(dev, useraddr);
1410 rc = ethtool_get_wol(dev, useraddr);
1413 rc = ethtool_set_wol(dev, useraddr);
1415 case ETHTOOL_GMSGLVL:
1416 rc = ethtool_get_value(dev, useraddr, ethcmd,
1417 dev->ethtool_ops->get_msglevel);
1419 case ETHTOOL_SMSGLVL:
1420 rc = ethtool_set_value_void(dev, useraddr,
1421 dev->ethtool_ops->set_msglevel);
1423 case ETHTOOL_NWAY_RST:
1424 rc = ethtool_nway_reset(dev);
1427 rc = ethtool_get_link(dev, useraddr);
1429 case ETHTOOL_GEEPROM:
1430 rc = ethtool_get_eeprom(dev, useraddr);
1432 case ETHTOOL_SEEPROM:
1433 rc = ethtool_set_eeprom(dev, useraddr);
1435 case ETHTOOL_GCOALESCE:
1436 rc = ethtool_get_coalesce(dev, useraddr);
1438 case ETHTOOL_SCOALESCE:
1439 rc = ethtool_set_coalesce(dev, useraddr);
1441 case ETHTOOL_GRINGPARAM:
1442 rc = ethtool_get_ringparam(dev, useraddr);
1444 case ETHTOOL_SRINGPARAM:
1445 rc = ethtool_set_ringparam(dev, useraddr);
1447 case ETHTOOL_GPAUSEPARAM:
1448 rc = ethtool_get_pauseparam(dev, useraddr);
1450 case ETHTOOL_SPAUSEPARAM:
1451 rc = ethtool_set_pauseparam(dev, useraddr);
1454 rc = ethtool_self_test(dev, useraddr);
1456 case ETHTOOL_GSTRINGS:
1457 rc = ethtool_get_strings(dev, useraddr);
1459 case ETHTOOL_PHYS_ID:
1460 rc = ethtool_phys_id(dev, useraddr);
1462 case ETHTOOL_GSTATS:
1463 rc = ethtool_get_stats(dev, useraddr);
1465 case ETHTOOL_GPERMADDR:
1466 rc = ethtool_get_perm_addr(dev, useraddr);
1468 case ETHTOOL_GFLAGS:
1469 rc = ethtool_get_value(dev, useraddr, ethcmd,
1470 __ethtool_get_flags);
1472 case ETHTOOL_SFLAGS:
1473 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
1475 case ETHTOOL_GPFLAGS:
1476 rc = ethtool_get_value(dev, useraddr, ethcmd,
1477 dev->ethtool_ops->get_priv_flags);
1479 case ETHTOOL_SPFLAGS:
1480 rc = ethtool_set_value(dev, useraddr,
1481 dev->ethtool_ops->set_priv_flags);
1484 case ETHTOOL_GRXRINGS:
1485 case ETHTOOL_GRXCLSRLCNT:
1486 case ETHTOOL_GRXCLSRULE:
1487 case ETHTOOL_GRXCLSRLALL:
1488 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1491 case ETHTOOL_SRXCLSRLDEL:
1492 case ETHTOOL_SRXCLSRLINS:
1493 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1495 case ETHTOOL_FLASHDEV:
1496 rc = ethtool_flash_device(dev, useraddr);
1499 rc = ethtool_reset(dev, useraddr);
1501 case ETHTOOL_GSSET_INFO:
1502 rc = ethtool_get_sset_info(dev, useraddr);
1504 case ETHTOOL_GRXFHINDIR:
1505 rc = ethtool_get_rxfh_indir(dev, useraddr);
1507 case ETHTOOL_SRXFHINDIR:
1508 rc = ethtool_set_rxfh_indir(dev, useraddr);
1510 case ETHTOOL_GFEATURES:
1511 rc = ethtool_get_features(dev, useraddr);
1513 case ETHTOOL_SFEATURES:
1514 rc = ethtool_set_features(dev, useraddr);
1516 case ETHTOOL_GTXCSUM:
1517 case ETHTOOL_GRXCSUM:
1523 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
1525 case ETHTOOL_STXCSUM:
1526 case ETHTOOL_SRXCSUM:
1532 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
1534 case ETHTOOL_GCHANNELS:
1535 rc = ethtool_get_channels(dev, useraddr);
1537 case ETHTOOL_SCHANNELS:
1538 rc = ethtool_set_channels(dev, useraddr);
1540 case ETHTOOL_SET_DUMP:
1541 rc = ethtool_set_dump(dev, useraddr);
1543 case ETHTOOL_GET_DUMP_FLAG:
1544 rc = ethtool_get_dump_flag(dev, useraddr);
1546 case ETHTOOL_GET_DUMP_DATA:
1547 rc = ethtool_get_dump_data(dev, useraddr);
1549 case ETHTOOL_GET_TS_INFO:
1550 rc = ethtool_get_ts_info(dev, useraddr);
1556 if (dev->ethtool_ops->complete)
1557 dev->ethtool_ops->complete(dev);
1559 if (old_features != dev->features)
1560 netdev_features_change(dev);