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_CTAG_TX_BIT] = "tx-vlan-hw-insert",
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",
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",
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",
102 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
104 struct ethtool_gfeatures cmd = {
105 .cmd = ETHTOOL_GFEATURES,
106 .size = ETHTOOL_DEV_FEATURE_WORDS,
108 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
109 u32 __user *sizeaddr;
113 /* in case feature bits run out again */
114 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
116 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
117 features[i].available = (u32)(dev->hw_features >> (32 * i));
118 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
119 features[i].active = (u32)(dev->features >> (32 * i));
120 features[i].never_changed =
121 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
124 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
125 if (get_user(copy_size, sizeaddr))
128 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
129 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
131 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
133 useraddr += sizeof(cmd);
134 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
140 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
142 struct ethtool_sfeatures cmd;
143 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
144 netdev_features_t wanted = 0, valid = 0;
147 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
149 useraddr += sizeof(cmd);
151 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
154 if (copy_from_user(features, useraddr, sizeof(features)))
157 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
158 valid |= (netdev_features_t)features[i].valid << (32 * i);
159 wanted |= (netdev_features_t)features[i].requested << (32 * i);
162 if (valid & ~NETIF_F_ETHTOOL_BITS)
165 if (valid & ~dev->hw_features) {
166 valid &= dev->hw_features;
167 ret |= ETHTOOL_F_UNSUPPORTED;
170 dev->wanted_features &= ~valid;
171 dev->wanted_features |= wanted & valid;
172 __netdev_update_features(dev);
174 if ((dev->wanted_features ^ dev->features) & valid)
175 ret |= ETHTOOL_F_WISH;
180 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
182 const struct ethtool_ops *ops = dev->ethtool_ops;
184 if (sset == ETH_SS_FEATURES)
185 return ARRAY_SIZE(netdev_features_strings);
187 if (ops->get_sset_count && ops->get_strings)
188 return ops->get_sset_count(dev, sset);
193 static void __ethtool_get_strings(struct net_device *dev,
194 u32 stringset, u8 *data)
196 const struct ethtool_ops *ops = dev->ethtool_ops;
198 if (stringset == ETH_SS_FEATURES)
199 memcpy(data, netdev_features_strings,
200 sizeof(netdev_features_strings));
202 /* ops->get_strings is valid because checked earlier */
203 ops->get_strings(dev, stringset, data);
206 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
208 /* feature masks of legacy discrete ethtool ops */
211 case ETHTOOL_GTXCSUM:
212 case ETHTOOL_STXCSUM:
213 return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM;
214 case ETHTOOL_GRXCSUM:
215 case ETHTOOL_SRXCSUM:
216 return NETIF_F_RXCSUM;
222 return NETIF_F_ALL_TSO;
237 static int ethtool_get_one_feature(struct net_device *dev,
238 char __user *useraddr, u32 ethcmd)
240 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
241 struct ethtool_value edata = {
243 .data = !!(dev->features & mask),
246 if (copy_to_user(useraddr, &edata, sizeof(edata)))
251 static int ethtool_set_one_feature(struct net_device *dev,
252 void __user *useraddr, u32 ethcmd)
254 struct ethtool_value edata;
255 netdev_features_t mask;
257 if (copy_from_user(&edata, useraddr, sizeof(edata)))
260 mask = ethtool_get_feature_mask(ethcmd);
261 mask &= dev->hw_features;
266 dev->wanted_features |= mask;
268 dev->wanted_features &= ~mask;
270 __netdev_update_features(dev);
275 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
276 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
277 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
278 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
281 static u32 __ethtool_get_flags(struct net_device *dev)
285 if (dev->features & NETIF_F_LRO)
286 flags |= ETH_FLAG_LRO;
287 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
288 flags |= ETH_FLAG_RXVLAN;
289 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
290 flags |= ETH_FLAG_TXVLAN;
291 if (dev->features & NETIF_F_NTUPLE)
292 flags |= ETH_FLAG_NTUPLE;
293 if (dev->features & NETIF_F_RXHASH)
294 flags |= ETH_FLAG_RXHASH;
299 static int __ethtool_set_flags(struct net_device *dev, u32 data)
301 netdev_features_t features = 0, changed;
303 if (data & ~ETH_ALL_FLAGS)
306 if (data & ETH_FLAG_LRO)
307 features |= NETIF_F_LRO;
308 if (data & ETH_FLAG_RXVLAN)
309 features |= NETIF_F_HW_VLAN_CTAG_RX;
310 if (data & ETH_FLAG_TXVLAN)
311 features |= NETIF_F_HW_VLAN_CTAG_TX;
312 if (data & ETH_FLAG_NTUPLE)
313 features |= NETIF_F_NTUPLE;
314 if (data & ETH_FLAG_RXHASH)
315 features |= NETIF_F_RXHASH;
317 /* allow changing only bits set in hw_features */
318 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
319 if (changed & ~dev->hw_features)
320 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
322 dev->wanted_features =
323 (dev->wanted_features & ~changed) | (features & changed);
325 __netdev_update_features(dev);
330 int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
334 if (!dev->ethtool_ops->get_settings)
337 memset(cmd, 0, sizeof(struct ethtool_cmd));
338 cmd->cmd = ETHTOOL_GSET;
339 return dev->ethtool_ops->get_settings(dev, cmd);
341 EXPORT_SYMBOL(__ethtool_get_settings);
343 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
346 struct ethtool_cmd cmd;
348 err = __ethtool_get_settings(dev, &cmd);
352 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
357 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
359 struct ethtool_cmd cmd;
361 if (!dev->ethtool_ops->set_settings)
364 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
367 return dev->ethtool_ops->set_settings(dev, &cmd);
370 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
371 void __user *useraddr)
373 struct ethtool_drvinfo info;
374 const struct ethtool_ops *ops = dev->ethtool_ops;
376 memset(&info, 0, sizeof(info));
377 info.cmd = ETHTOOL_GDRVINFO;
378 if (ops->get_drvinfo) {
379 ops->get_drvinfo(dev, &info);
380 } else if (dev->dev.parent && dev->dev.parent->driver) {
381 strlcpy(info.bus_info, dev_name(dev->dev.parent),
382 sizeof(info.bus_info));
383 strlcpy(info.driver, dev->dev.parent->driver->name,
384 sizeof(info.driver));
390 * this method of obtaining string set info is deprecated;
391 * Use ETHTOOL_GSSET_INFO instead.
393 if (ops->get_sset_count) {
396 rc = ops->get_sset_count(dev, ETH_SS_TEST);
398 info.testinfo_len = rc;
399 rc = ops->get_sset_count(dev, ETH_SS_STATS);
402 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
404 info.n_priv_flags = rc;
406 if (ops->get_regs_len)
407 info.regdump_len = ops->get_regs_len(dev);
408 if (ops->get_eeprom_len)
409 info.eedump_len = ops->get_eeprom_len(dev);
411 if (copy_to_user(useraddr, &info, sizeof(info)))
416 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
417 void __user *useraddr)
419 struct ethtool_sset_info info;
421 int i, idx = 0, n_bits = 0, ret, rc;
422 u32 *info_buf = NULL;
424 if (copy_from_user(&info, useraddr, sizeof(info)))
427 /* store copy of mask, because we zero struct later on */
428 sset_mask = info.sset_mask;
432 /* calculate size of return buffer */
433 n_bits = hweight64(sset_mask);
435 memset(&info, 0, sizeof(info));
436 info.cmd = ETHTOOL_GSSET_INFO;
438 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
443 * fill return buffer based on input bitmask and successful
444 * get_sset_count return
446 for (i = 0; i < 64; i++) {
447 if (!(sset_mask & (1ULL << i)))
450 rc = __ethtool_get_sset_count(dev, i);
452 info.sset_mask |= (1ULL << i);
453 info_buf[idx++] = rc;
458 if (copy_to_user(useraddr, &info, sizeof(info)))
461 useraddr += offsetof(struct ethtool_sset_info, data);
462 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
472 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
473 u32 cmd, void __user *useraddr)
475 struct ethtool_rxnfc info;
476 size_t info_size = sizeof(info);
479 if (!dev->ethtool_ops->set_rxnfc)
482 /* struct ethtool_rxnfc was originally defined for
483 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
484 * members. User-space might still be using that
486 if (cmd == ETHTOOL_SRXFH)
487 info_size = (offsetof(struct ethtool_rxnfc, data) +
490 if (copy_from_user(&info, useraddr, info_size))
493 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
497 if (cmd == ETHTOOL_SRXCLSRLINS &&
498 copy_to_user(useraddr, &info, info_size))
504 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
505 u32 cmd, void __user *useraddr)
507 struct ethtool_rxnfc info;
508 size_t info_size = sizeof(info);
509 const struct ethtool_ops *ops = dev->ethtool_ops;
511 void *rule_buf = NULL;
516 /* struct ethtool_rxnfc was originally defined for
517 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
518 * members. User-space might still be using that
520 if (cmd == ETHTOOL_GRXFH)
521 info_size = (offsetof(struct ethtool_rxnfc, data) +
524 if (copy_from_user(&info, useraddr, info_size))
527 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
528 if (info.rule_cnt > 0) {
529 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
530 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
537 ret = ops->get_rxnfc(dev, &info, rule_buf);
542 if (copy_to_user(useraddr, &info, info_size))
546 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
547 if (copy_to_user(useraddr, rule_buf,
548 info.rule_cnt * sizeof(u32)))
559 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
560 void __user *useraddr)
562 u32 user_size, dev_size;
566 if (!dev->ethtool_ops->get_rxfh_indir_size ||
567 !dev->ethtool_ops->get_rxfh_indir)
569 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
573 if (copy_from_user(&user_size,
574 useraddr + offsetof(struct ethtool_rxfh_indir, size),
578 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
579 &dev_size, sizeof(dev_size)))
582 /* If the user buffer size is 0, this is just a query for the
583 * device table size. Otherwise, if it's smaller than the
584 * device table size it's an error.
586 if (user_size < dev_size)
587 return user_size == 0 ? 0 : -EINVAL;
589 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
593 ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
597 if (copy_to_user(useraddr +
598 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
599 indir, dev_size * sizeof(indir[0])))
607 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
608 void __user *useraddr)
610 struct ethtool_rxnfc rx_rings;
611 u32 user_size, dev_size, i;
613 const struct ethtool_ops *ops = dev->ethtool_ops;
616 if (!ops->get_rxfh_indir_size || !ops->set_rxfh_indir ||
620 dev_size = ops->get_rxfh_indir_size(dev);
624 if (copy_from_user(&user_size,
625 useraddr + offsetof(struct ethtool_rxfh_indir, size),
629 if (user_size != 0 && user_size != dev_size)
632 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
636 rx_rings.cmd = ETHTOOL_GRXRINGS;
637 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
641 if (user_size == 0) {
642 for (i = 0; i < dev_size; i++)
643 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
645 if (copy_from_user(indir,
647 offsetof(struct ethtool_rxfh_indir,
649 dev_size * sizeof(indir[0]))) {
654 /* Validate ring indices */
655 for (i = 0; i < dev_size; i++) {
656 if (indir[i] >= rx_rings.data) {
663 ret = ops->set_rxfh_indir(dev, indir);
670 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
672 struct ethtool_regs regs;
673 const struct ethtool_ops *ops = dev->ethtool_ops;
677 if (!ops->get_regs || !ops->get_regs_len)
680 if (copy_from_user(®s, useraddr, sizeof(regs)))
683 reglen = ops->get_regs_len(dev);
684 if (regs.len > reglen)
687 regbuf = vzalloc(reglen);
688 if (reglen && !regbuf)
691 ops->get_regs(dev, ®s, regbuf);
694 if (copy_to_user(useraddr, ®s, sizeof(regs)))
696 useraddr += offsetof(struct ethtool_regs, data);
697 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
706 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
708 struct ethtool_value reset;
711 if (!dev->ethtool_ops->reset)
714 if (copy_from_user(&reset, useraddr, sizeof(reset)))
717 ret = dev->ethtool_ops->reset(dev, &reset.data);
721 if (copy_to_user(useraddr, &reset, sizeof(reset)))
726 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
728 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
730 if (!dev->ethtool_ops->get_wol)
733 dev->ethtool_ops->get_wol(dev, &wol);
735 if (copy_to_user(useraddr, &wol, sizeof(wol)))
740 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
742 struct ethtool_wolinfo wol;
744 if (!dev->ethtool_ops->set_wol)
747 if (copy_from_user(&wol, useraddr, sizeof(wol)))
750 return dev->ethtool_ops->set_wol(dev, &wol);
753 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
755 struct ethtool_eee edata;
758 if (!dev->ethtool_ops->get_eee)
761 memset(&edata, 0, sizeof(struct ethtool_eee));
762 edata.cmd = ETHTOOL_GEEE;
763 rc = dev->ethtool_ops->get_eee(dev, &edata);
768 if (copy_to_user(useraddr, &edata, sizeof(edata)))
774 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
776 struct ethtool_eee edata;
778 if (!dev->ethtool_ops->set_eee)
781 if (copy_from_user(&edata, useraddr, sizeof(edata)))
784 return dev->ethtool_ops->set_eee(dev, &edata);
787 static int ethtool_nway_reset(struct net_device *dev)
789 if (!dev->ethtool_ops->nway_reset)
792 return dev->ethtool_ops->nway_reset(dev);
795 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
797 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
799 if (!dev->ethtool_ops->get_link)
802 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
804 if (copy_to_user(useraddr, &edata, sizeof(edata)))
809 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
810 int (*getter)(struct net_device *,
811 struct ethtool_eeprom *, u8 *),
814 struct ethtool_eeprom eeprom;
815 void __user *userbuf = useraddr + sizeof(eeprom);
820 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
823 /* Check for wrap and zero */
824 if (eeprom.offset + eeprom.len <= eeprom.offset)
827 /* Check for exceeding total eeprom len */
828 if (eeprom.offset + eeprom.len > total_len)
831 data = kmalloc(PAGE_SIZE, GFP_USER);
835 bytes_remaining = eeprom.len;
836 while (bytes_remaining > 0) {
837 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
839 ret = getter(dev, &eeprom, data);
842 if (copy_to_user(userbuf, data, eeprom.len)) {
846 userbuf += eeprom.len;
847 eeprom.offset += eeprom.len;
848 bytes_remaining -= eeprom.len;
851 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
852 eeprom.offset -= eeprom.len;
853 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
860 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
862 const struct ethtool_ops *ops = dev->ethtool_ops;
864 if (!ops->get_eeprom || !ops->get_eeprom_len)
867 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
868 ops->get_eeprom_len(dev));
871 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
873 struct ethtool_eeprom eeprom;
874 const struct ethtool_ops *ops = dev->ethtool_ops;
875 void __user *userbuf = useraddr + sizeof(eeprom);
880 if (!ops->set_eeprom || !ops->get_eeprom_len)
883 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
886 /* Check for wrap and zero */
887 if (eeprom.offset + eeprom.len <= eeprom.offset)
890 /* Check for exceeding total eeprom len */
891 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
894 data = kmalloc(PAGE_SIZE, GFP_USER);
898 bytes_remaining = eeprom.len;
899 while (bytes_remaining > 0) {
900 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
902 if (copy_from_user(data, userbuf, eeprom.len)) {
906 ret = ops->set_eeprom(dev, &eeprom, data);
909 userbuf += eeprom.len;
910 eeprom.offset += eeprom.len;
911 bytes_remaining -= eeprom.len;
918 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
919 void __user *useraddr)
921 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
923 if (!dev->ethtool_ops->get_coalesce)
926 dev->ethtool_ops->get_coalesce(dev, &coalesce);
928 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
933 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
934 void __user *useraddr)
936 struct ethtool_coalesce coalesce;
938 if (!dev->ethtool_ops->set_coalesce)
941 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
944 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
947 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
949 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
951 if (!dev->ethtool_ops->get_ringparam)
954 dev->ethtool_ops->get_ringparam(dev, &ringparam);
956 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
961 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
963 struct ethtool_ringparam ringparam;
965 if (!dev->ethtool_ops->set_ringparam)
968 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
971 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
974 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
975 void __user *useraddr)
977 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
979 if (!dev->ethtool_ops->get_channels)
982 dev->ethtool_ops->get_channels(dev, &channels);
984 if (copy_to_user(useraddr, &channels, sizeof(channels)))
989 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
990 void __user *useraddr)
992 struct ethtool_channels channels;
994 if (!dev->ethtool_ops->set_channels)
997 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1000 return dev->ethtool_ops->set_channels(dev, &channels);
1003 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1005 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1007 if (!dev->ethtool_ops->get_pauseparam)
1010 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1012 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1017 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1019 struct ethtool_pauseparam pauseparam;
1021 if (!dev->ethtool_ops->set_pauseparam)
1024 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1027 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1030 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1032 struct ethtool_test test;
1033 const struct ethtool_ops *ops = dev->ethtool_ops;
1037 if (!ops->self_test || !ops->get_sset_count)
1040 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1043 WARN_ON(test_len == 0);
1045 if (copy_from_user(&test, useraddr, sizeof(test)))
1048 test.len = test_len;
1049 data = kmalloc(test_len * sizeof(u64), GFP_USER);
1053 ops->self_test(dev, &test, data);
1056 if (copy_to_user(useraddr, &test, sizeof(test)))
1058 useraddr += sizeof(test);
1059 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1068 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1070 struct ethtool_gstrings gstrings;
1074 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1077 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1083 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1087 __ethtool_get_strings(dev, gstrings.string_set, data);
1090 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1092 useraddr += sizeof(gstrings);
1093 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1102 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1104 struct ethtool_value id;
1106 const struct ethtool_ops *ops = dev->ethtool_ops;
1109 if (!ops->set_phys_id)
1115 if (copy_from_user(&id, useraddr, sizeof(id)))
1118 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1122 /* Drop the RTNL lock while waiting, but prevent reentry or
1123 * removal of the device.
1130 /* Driver will handle this itself */
1131 schedule_timeout_interruptible(
1132 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1134 /* Driver expects to be called at twice the frequency in rc */
1135 int n = rc * 2, i, interval = HZ / n;
1137 /* Count down seconds */
1139 /* Count down iterations per second */
1143 rc = ops->set_phys_id(dev,
1144 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1148 schedule_timeout_interruptible(interval);
1149 } while (!signal_pending(current) && --i != 0);
1150 } while (!signal_pending(current) &&
1151 (id.data == 0 || --id.data != 0));
1158 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1162 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1164 struct ethtool_stats stats;
1165 const struct ethtool_ops *ops = dev->ethtool_ops;
1169 if (!ops->get_ethtool_stats || !ops->get_sset_count)
1172 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1175 WARN_ON(n_stats == 0);
1177 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1180 stats.n_stats = n_stats;
1181 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1185 ops->get_ethtool_stats(dev, &stats, data);
1188 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1190 useraddr += sizeof(stats);
1191 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1200 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1202 struct ethtool_perm_addr epaddr;
1204 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1207 if (epaddr.size < dev->addr_len)
1209 epaddr.size = dev->addr_len;
1211 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1213 useraddr += sizeof(epaddr);
1214 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1219 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1220 u32 cmd, u32 (*actor)(struct net_device *))
1222 struct ethtool_value edata = { .cmd = cmd };
1227 edata.data = actor(dev);
1229 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1234 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1235 void (*actor)(struct net_device *, u32))
1237 struct ethtool_value edata;
1242 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1245 actor(dev, edata.data);
1249 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1250 int (*actor)(struct net_device *, u32))
1252 struct ethtool_value edata;
1257 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1260 return actor(dev, edata.data);
1263 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1264 char __user *useraddr)
1266 struct ethtool_flash efl;
1268 if (copy_from_user(&efl, useraddr, sizeof(efl)))
1271 if (!dev->ethtool_ops->flash_device)
1274 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
1276 return dev->ethtool_ops->flash_device(dev, &efl);
1279 static int ethtool_set_dump(struct net_device *dev,
1280 void __user *useraddr)
1282 struct ethtool_dump dump;
1284 if (!dev->ethtool_ops->set_dump)
1287 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1290 return dev->ethtool_ops->set_dump(dev, &dump);
1293 static int ethtool_get_dump_flag(struct net_device *dev,
1294 void __user *useraddr)
1297 struct ethtool_dump dump;
1298 const struct ethtool_ops *ops = dev->ethtool_ops;
1300 if (!ops->get_dump_flag)
1303 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1306 ret = ops->get_dump_flag(dev, &dump);
1310 if (copy_to_user(useraddr, &dump, sizeof(dump)))
1315 static int ethtool_get_dump_data(struct net_device *dev,
1316 void __user *useraddr)
1320 struct ethtool_dump dump, tmp;
1321 const struct ethtool_ops *ops = dev->ethtool_ops;
1324 if (!ops->get_dump_data || !ops->get_dump_flag)
1327 if (copy_from_user(&dump, useraddr, sizeof(dump)))
1330 memset(&tmp, 0, sizeof(tmp));
1331 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
1332 ret = ops->get_dump_flag(dev, &tmp);
1336 len = min(tmp.len, dump.len);
1340 /* Don't ever let the driver think there's more space available
1341 * than it requested with .get_dump_flag().
1345 /* Always allocate enough space to hold the whole thing so that the
1346 * driver does not need to check the length and bother with partial
1349 data = vzalloc(tmp.len);
1352 ret = ops->get_dump_data(dev, &dump, data);
1356 /* There are two sane possibilities:
1357 * 1. The driver's .get_dump_data() does not touch dump.len.
1358 * 2. Or it may set dump.len to how much it really writes, which
1359 * should be tmp.len (or len if it can do a partial dump).
1360 * In any case respond to userspace with the actual length of data
1363 WARN_ON(dump.len != len && dump.len != tmp.len);
1366 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
1370 useraddr += offsetof(struct ethtool_dump, data);
1371 if (copy_to_user(useraddr, data, len))
1378 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
1381 struct ethtool_ts_info info;
1382 const struct ethtool_ops *ops = dev->ethtool_ops;
1383 struct phy_device *phydev = dev->phydev;
1385 memset(&info, 0, sizeof(info));
1386 info.cmd = ETHTOOL_GET_TS_INFO;
1388 if (phydev && phydev->drv && phydev->drv->ts_info) {
1389 err = phydev->drv->ts_info(phydev, &info);
1390 } else if (ops->get_ts_info) {
1391 err = ops->get_ts_info(dev, &info);
1393 info.so_timestamping =
1394 SOF_TIMESTAMPING_RX_SOFTWARE |
1395 SOF_TIMESTAMPING_SOFTWARE;
1396 info.phc_index = -1;
1402 if (copy_to_user(useraddr, &info, sizeof(info)))
1408 static int ethtool_get_module_info(struct net_device *dev,
1409 void __user *useraddr)
1412 struct ethtool_modinfo modinfo;
1413 const struct ethtool_ops *ops = dev->ethtool_ops;
1415 if (!ops->get_module_info)
1418 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
1421 ret = ops->get_module_info(dev, &modinfo);
1425 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
1431 static int ethtool_get_module_eeprom(struct net_device *dev,
1432 void __user *useraddr)
1435 struct ethtool_modinfo modinfo;
1436 const struct ethtool_ops *ops = dev->ethtool_ops;
1438 if (!ops->get_module_info || !ops->get_module_eeprom)
1441 ret = ops->get_module_info(dev, &modinfo);
1445 return ethtool_get_any_eeprom(dev, useraddr, ops->get_module_eeprom,
1446 modinfo.eeprom_len);
1449 /* The main entry point in this file. Called from net/core/dev_ioctl.c */
1451 int dev_ethtool(struct net *net, struct ifreq *ifr)
1453 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1454 void __user *useraddr = ifr->ifr_data;
1457 netdev_features_t old_features;
1459 if (!dev || !netif_device_present(dev))
1462 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
1465 /* Allow some commands to be done by anyone */
1468 case ETHTOOL_GDRVINFO:
1469 case ETHTOOL_GMSGLVL:
1471 case ETHTOOL_GCOALESCE:
1472 case ETHTOOL_GRINGPARAM:
1473 case ETHTOOL_GPAUSEPARAM:
1474 case ETHTOOL_GRXCSUM:
1475 case ETHTOOL_GTXCSUM:
1477 case ETHTOOL_GSSET_INFO:
1478 case ETHTOOL_GSTRINGS:
1479 case ETHTOOL_GSTATS:
1481 case ETHTOOL_GPERMADDR:
1485 case ETHTOOL_GFLAGS:
1486 case ETHTOOL_GPFLAGS:
1488 case ETHTOOL_GRXRINGS:
1489 case ETHTOOL_GRXCLSRLCNT:
1490 case ETHTOOL_GRXCLSRULE:
1491 case ETHTOOL_GRXCLSRLALL:
1492 case ETHTOOL_GRXFHINDIR:
1493 case ETHTOOL_GFEATURES:
1494 case ETHTOOL_GCHANNELS:
1495 case ETHTOOL_GET_TS_INFO:
1499 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1503 if (dev->ethtool_ops->begin) {
1504 rc = dev->ethtool_ops->begin(dev);
1508 old_features = dev->features;
1512 rc = ethtool_get_settings(dev, useraddr);
1515 rc = ethtool_set_settings(dev, useraddr);
1517 case ETHTOOL_GDRVINFO:
1518 rc = ethtool_get_drvinfo(dev, useraddr);
1521 rc = ethtool_get_regs(dev, useraddr);
1524 rc = ethtool_get_wol(dev, useraddr);
1527 rc = ethtool_set_wol(dev, useraddr);
1529 case ETHTOOL_GMSGLVL:
1530 rc = ethtool_get_value(dev, useraddr, ethcmd,
1531 dev->ethtool_ops->get_msglevel);
1533 case ETHTOOL_SMSGLVL:
1534 rc = ethtool_set_value_void(dev, useraddr,
1535 dev->ethtool_ops->set_msglevel);
1538 rc = ethtool_get_eee(dev, useraddr);
1541 rc = ethtool_set_eee(dev, useraddr);
1543 case ETHTOOL_NWAY_RST:
1544 rc = ethtool_nway_reset(dev);
1547 rc = ethtool_get_link(dev, useraddr);
1549 case ETHTOOL_GEEPROM:
1550 rc = ethtool_get_eeprom(dev, useraddr);
1552 case ETHTOOL_SEEPROM:
1553 rc = ethtool_set_eeprom(dev, useraddr);
1555 case ETHTOOL_GCOALESCE:
1556 rc = ethtool_get_coalesce(dev, useraddr);
1558 case ETHTOOL_SCOALESCE:
1559 rc = ethtool_set_coalesce(dev, useraddr);
1561 case ETHTOOL_GRINGPARAM:
1562 rc = ethtool_get_ringparam(dev, useraddr);
1564 case ETHTOOL_SRINGPARAM:
1565 rc = ethtool_set_ringparam(dev, useraddr);
1567 case ETHTOOL_GPAUSEPARAM:
1568 rc = ethtool_get_pauseparam(dev, useraddr);
1570 case ETHTOOL_SPAUSEPARAM:
1571 rc = ethtool_set_pauseparam(dev, useraddr);
1574 rc = ethtool_self_test(dev, useraddr);
1576 case ETHTOOL_GSTRINGS:
1577 rc = ethtool_get_strings(dev, useraddr);
1579 case ETHTOOL_PHYS_ID:
1580 rc = ethtool_phys_id(dev, useraddr);
1582 case ETHTOOL_GSTATS:
1583 rc = ethtool_get_stats(dev, useraddr);
1585 case ETHTOOL_GPERMADDR:
1586 rc = ethtool_get_perm_addr(dev, useraddr);
1588 case ETHTOOL_GFLAGS:
1589 rc = ethtool_get_value(dev, useraddr, ethcmd,
1590 __ethtool_get_flags);
1592 case ETHTOOL_SFLAGS:
1593 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
1595 case ETHTOOL_GPFLAGS:
1596 rc = ethtool_get_value(dev, useraddr, ethcmd,
1597 dev->ethtool_ops->get_priv_flags);
1599 case ETHTOOL_SPFLAGS:
1600 rc = ethtool_set_value(dev, useraddr,
1601 dev->ethtool_ops->set_priv_flags);
1604 case ETHTOOL_GRXRINGS:
1605 case ETHTOOL_GRXCLSRLCNT:
1606 case ETHTOOL_GRXCLSRULE:
1607 case ETHTOOL_GRXCLSRLALL:
1608 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1611 case ETHTOOL_SRXCLSRLDEL:
1612 case ETHTOOL_SRXCLSRLINS:
1613 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1615 case ETHTOOL_FLASHDEV:
1616 rc = ethtool_flash_device(dev, useraddr);
1619 rc = ethtool_reset(dev, useraddr);
1621 case ETHTOOL_GSSET_INFO:
1622 rc = ethtool_get_sset_info(dev, useraddr);
1624 case ETHTOOL_GRXFHINDIR:
1625 rc = ethtool_get_rxfh_indir(dev, useraddr);
1627 case ETHTOOL_SRXFHINDIR:
1628 rc = ethtool_set_rxfh_indir(dev, useraddr);
1630 case ETHTOOL_GFEATURES:
1631 rc = ethtool_get_features(dev, useraddr);
1633 case ETHTOOL_SFEATURES:
1634 rc = ethtool_set_features(dev, useraddr);
1636 case ETHTOOL_GTXCSUM:
1637 case ETHTOOL_GRXCSUM:
1643 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
1645 case ETHTOOL_STXCSUM:
1646 case ETHTOOL_SRXCSUM:
1652 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
1654 case ETHTOOL_GCHANNELS:
1655 rc = ethtool_get_channels(dev, useraddr);
1657 case ETHTOOL_SCHANNELS:
1658 rc = ethtool_set_channels(dev, useraddr);
1660 case ETHTOOL_SET_DUMP:
1661 rc = ethtool_set_dump(dev, useraddr);
1663 case ETHTOOL_GET_DUMP_FLAG:
1664 rc = ethtool_get_dump_flag(dev, useraddr);
1666 case ETHTOOL_GET_DUMP_DATA:
1667 rc = ethtool_get_dump_data(dev, useraddr);
1669 case ETHTOOL_GET_TS_INFO:
1670 rc = ethtool_get_ts_info(dev, useraddr);
1672 case ETHTOOL_GMODULEINFO:
1673 rc = ethtool_get_module_info(dev, useraddr);
1675 case ETHTOOL_GMODULEEEPROM:
1676 rc = ethtool_get_module_eeprom(dev, useraddr);
1682 if (dev->ethtool_ops->complete)
1683 dev->ethtool_ops->complete(dev);
1685 if (old_features != dev->features)
1686 netdev_features_change(dev);