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 <asm/uaccess.h>
23 * Some useful ethtool_ops methods that're device independent.
24 * If we find that all drivers want to do the same thing here,
25 * we can turn these into dev_() function calls.
28 u32 ethtool_op_get_link(struct net_device *dev)
30 return netif_carrier_ok(dev) ? 1 : 0;
33 u32 ethtool_op_get_tx_csum(struct net_device *dev)
35 return (dev->features & NETIF_F_ALL_CSUM) != 0;
38 int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
41 dev->features |= NETIF_F_IP_CSUM;
43 dev->features &= ~NETIF_F_IP_CSUM;
48 int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
51 dev->features |= NETIF_F_HW_CSUM;
53 dev->features &= ~NETIF_F_HW_CSUM;
58 int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
61 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
63 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
68 u32 ethtool_op_get_sg(struct net_device *dev)
70 return (dev->features & NETIF_F_SG) != 0;
73 int ethtool_op_set_sg(struct net_device *dev, u32 data)
76 dev->features |= NETIF_F_SG;
78 dev->features &= ~NETIF_F_SG;
83 u32 ethtool_op_get_tso(struct net_device *dev)
85 return (dev->features & NETIF_F_TSO) != 0;
88 int ethtool_op_set_tso(struct net_device *dev, u32 data)
91 dev->features |= NETIF_F_TSO;
93 dev->features &= ~NETIF_F_TSO;
98 u32 ethtool_op_get_ufo(struct net_device *dev)
100 return (dev->features & NETIF_F_UFO) != 0;
103 int ethtool_op_set_ufo(struct net_device *dev, u32 data)
106 dev->features |= NETIF_F_UFO;
108 dev->features &= ~NETIF_F_UFO;
112 /* the following list of flags are the same as their associated
113 * NETIF_F_xxx values in include/linux/netdevice.h
115 static const u32 flags_dup_features =
118 u32 ethtool_op_get_flags(struct net_device *dev)
120 /* in the future, this function will probably contain additional
121 * handling for flags which are not so easily handled
122 * by a simple masking operation
125 return dev->features & flags_dup_features;
128 int ethtool_op_set_flags(struct net_device *dev, u32 data)
130 if (data & ETH_FLAG_LRO)
131 dev->features |= NETIF_F_LRO;
133 dev->features &= ~NETIF_F_LRO;
138 /* Handlers for each ethtool command */
140 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
142 struct ethtool_cmd cmd = { ETHTOOL_GSET };
145 if (!dev->ethtool_ops->get_settings)
148 err = dev->ethtool_ops->get_settings(dev, &cmd);
152 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
157 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
159 struct ethtool_cmd cmd;
161 if (!dev->ethtool_ops->set_settings)
164 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
167 return dev->ethtool_ops->set_settings(dev, &cmd);
170 static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
172 struct ethtool_drvinfo info;
173 const struct ethtool_ops *ops = dev->ethtool_ops;
175 if (!ops->get_drvinfo)
178 memset(&info, 0, sizeof(info));
179 info.cmd = ETHTOOL_GDRVINFO;
180 ops->get_drvinfo(dev, &info);
182 if (ops->get_sset_count) {
185 rc = ops->get_sset_count(dev, ETH_SS_TEST);
187 info.testinfo_len = rc;
188 rc = ops->get_sset_count(dev, ETH_SS_STATS);
191 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
193 info.n_priv_flags = rc;
195 /* code path for obsolete hooks */
197 if (ops->self_test_count)
198 info.testinfo_len = ops->self_test_count(dev);
199 if (ops->get_stats_count)
200 info.n_stats = ops->get_stats_count(dev);
202 if (ops->get_regs_len)
203 info.regdump_len = ops->get_regs_len(dev);
204 if (ops->get_eeprom_len)
205 info.eedump_len = ops->get_eeprom_len(dev);
207 if (copy_to_user(useraddr, &info, sizeof(info)))
212 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
214 struct ethtool_regs regs;
215 const struct ethtool_ops *ops = dev->ethtool_ops;
219 if (!ops->get_regs || !ops->get_regs_len)
222 if (copy_from_user(®s, useraddr, sizeof(regs)))
225 reglen = ops->get_regs_len(dev);
226 if (regs.len > reglen)
229 regbuf = kmalloc(reglen, GFP_USER);
233 ops->get_regs(dev, ®s, regbuf);
236 if (copy_to_user(useraddr, ®s, sizeof(regs)))
238 useraddr += offsetof(struct ethtool_regs, data);
239 if (copy_to_user(useraddr, regbuf, regs.len))
248 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
250 struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
252 if (!dev->ethtool_ops->get_wol)
255 dev->ethtool_ops->get_wol(dev, &wol);
257 if (copy_to_user(useraddr, &wol, sizeof(wol)))
262 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
264 struct ethtool_wolinfo wol;
266 if (!dev->ethtool_ops->set_wol)
269 if (copy_from_user(&wol, useraddr, sizeof(wol)))
272 return dev->ethtool_ops->set_wol(dev, &wol);
275 static int ethtool_nway_reset(struct net_device *dev)
277 if (!dev->ethtool_ops->nway_reset)
280 return dev->ethtool_ops->nway_reset(dev);
283 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
285 struct ethtool_eeprom eeprom;
286 const struct ethtool_ops *ops = dev->ethtool_ops;
290 if (!ops->get_eeprom || !ops->get_eeprom_len)
293 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
296 /* Check for wrap and zero */
297 if (eeprom.offset + eeprom.len <= eeprom.offset)
300 /* Check for exceeding total eeprom len */
301 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
304 data = kmalloc(eeprom.len, GFP_USER);
309 if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
312 ret = ops->get_eeprom(dev, &eeprom, data);
317 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
319 if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
328 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
330 struct ethtool_eeprom eeprom;
331 const struct ethtool_ops *ops = dev->ethtool_ops;
335 if (!ops->set_eeprom || !ops->get_eeprom_len)
338 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
341 /* Check for wrap and zero */
342 if (eeprom.offset + eeprom.len <= eeprom.offset)
345 /* Check for exceeding total eeprom len */
346 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
349 data = kmalloc(eeprom.len, GFP_USER);
354 if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
357 ret = ops->set_eeprom(dev, &eeprom, data);
361 if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
369 static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
371 struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
373 if (!dev->ethtool_ops->get_coalesce)
376 dev->ethtool_ops->get_coalesce(dev, &coalesce);
378 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
383 static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
385 struct ethtool_coalesce coalesce;
387 if (!dev->ethtool_ops->set_coalesce)
390 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
393 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
396 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
398 struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
400 if (!dev->ethtool_ops->get_ringparam)
403 dev->ethtool_ops->get_ringparam(dev, &ringparam);
405 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
410 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
412 struct ethtool_ringparam ringparam;
414 if (!dev->ethtool_ops->set_ringparam)
417 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
420 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
423 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
425 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
427 if (!dev->ethtool_ops->get_pauseparam)
430 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
432 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
437 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
439 struct ethtool_pauseparam pauseparam;
441 if (!dev->ethtool_ops->set_pauseparam)
444 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
447 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
450 static int __ethtool_set_sg(struct net_device *dev, u32 data)
454 if (!data && dev->ethtool_ops->set_tso) {
455 err = dev->ethtool_ops->set_tso(dev, 0);
460 if (!data && dev->ethtool_ops->set_ufo) {
461 err = dev->ethtool_ops->set_ufo(dev, 0);
465 return dev->ethtool_ops->set_sg(dev, data);
468 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
470 struct ethtool_value edata;
473 if (!dev->ethtool_ops->set_tx_csum)
476 if (copy_from_user(&edata, useraddr, sizeof(edata)))
479 if (!edata.data && dev->ethtool_ops->set_sg) {
480 err = __ethtool_set_sg(dev, 0);
485 return dev->ethtool_ops->set_tx_csum(dev, edata.data);
488 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
490 struct ethtool_value edata;
492 if (!dev->ethtool_ops->set_sg)
495 if (copy_from_user(&edata, useraddr, sizeof(edata)))
499 !(dev->features & NETIF_F_ALL_CSUM))
502 return __ethtool_set_sg(dev, edata.data);
505 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
507 struct ethtool_value edata;
509 if (!dev->ethtool_ops->set_tso)
512 if (copy_from_user(&edata, useraddr, sizeof(edata)))
515 if (edata.data && !(dev->features & NETIF_F_SG))
518 return dev->ethtool_ops->set_tso(dev, edata.data);
521 static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
523 struct ethtool_value edata;
525 if (!dev->ethtool_ops->set_ufo)
527 if (copy_from_user(&edata, useraddr, sizeof(edata)))
529 if (edata.data && !(dev->features & NETIF_F_SG))
531 if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
533 return dev->ethtool_ops->set_ufo(dev, edata.data);
536 static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
538 struct ethtool_value edata = { ETHTOOL_GGSO };
540 edata.data = dev->features & NETIF_F_GSO;
541 if (copy_to_user(useraddr, &edata, sizeof(edata)))
546 static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
548 struct ethtool_value edata;
550 if (copy_from_user(&edata, useraddr, sizeof(edata)))
553 dev->features |= NETIF_F_GSO;
555 dev->features &= ~NETIF_F_GSO;
559 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
561 struct ethtool_test test;
562 const struct ethtool_ops *ops = dev->ethtool_ops;
568 if (!ops->get_sset_count && !ops->self_test_count)
571 if (ops->get_sset_count)
572 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
574 /* code path for obsolete hook */
575 test_len = ops->self_test_count(dev);
578 WARN_ON(test_len == 0);
580 if (copy_from_user(&test, useraddr, sizeof(test)))
584 data = kmalloc(test_len * sizeof(u64), GFP_USER);
588 ops->self_test(dev, &test, data);
591 if (copy_to_user(useraddr, &test, sizeof(test)))
593 useraddr += sizeof(test);
594 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
603 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
605 struct ethtool_gstrings gstrings;
606 const struct ethtool_ops *ops = dev->ethtool_ops;
610 if (!ops->get_strings)
613 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
616 if (ops->get_sset_count) {
617 ret = ops->get_sset_count(dev, gstrings.string_set);
623 /* code path for obsolete hooks */
625 switch (gstrings.string_set) {
627 if (!ops->self_test_count)
629 gstrings.len = ops->self_test_count(dev);
632 if (!ops->get_stats_count)
634 gstrings.len = ops->get_stats_count(dev);
641 data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
645 ops->get_strings(dev, gstrings.string_set, data);
648 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
650 useraddr += sizeof(gstrings);
651 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
660 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
662 struct ethtool_value id;
664 if (!dev->ethtool_ops->phys_id)
667 if (copy_from_user(&id, useraddr, sizeof(id)))
670 return dev->ethtool_ops->phys_id(dev, id.data);
673 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
675 struct ethtool_stats stats;
676 const struct ethtool_ops *ops = dev->ethtool_ops;
680 if (!ops->get_ethtool_stats)
682 if (!ops->get_sset_count && !ops->get_stats_count)
685 if (ops->get_sset_count)
686 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
688 /* code path for obsolete hook */
689 n_stats = ops->get_stats_count(dev);
692 WARN_ON(n_stats == 0);
694 if (copy_from_user(&stats, useraddr, sizeof(stats)))
697 stats.n_stats = n_stats;
698 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
702 ops->get_ethtool_stats(dev, &stats, data);
705 if (copy_to_user(useraddr, &stats, sizeof(stats)))
707 useraddr += sizeof(stats);
708 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
717 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
719 struct ethtool_perm_addr epaddr;
721 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
724 if (epaddr.size < dev->addr_len)
726 epaddr.size = dev->addr_len;
728 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
730 useraddr += sizeof(epaddr);
731 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
736 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
737 u32 cmd, u32 (*actor)(struct net_device *))
739 struct ethtool_value edata = { cmd };
744 edata.data = actor(dev);
746 if (copy_to_user(useraddr, &edata, sizeof(edata)))
751 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
752 void (*actor)(struct net_device *, u32))
754 struct ethtool_value edata;
759 if (copy_from_user(&edata, useraddr, sizeof(edata)))
762 actor(dev, edata.data);
766 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
767 int (*actor)(struct net_device *, u32))
769 struct ethtool_value edata;
774 if (copy_from_user(&edata, useraddr, sizeof(edata)))
777 return actor(dev, edata.data);
780 /* The main entry point in this file. Called from net/core/dev.c */
782 int dev_ethtool(struct net *net, struct ifreq *ifr)
784 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
785 void __user *useraddr = ifr->ifr_data;
788 unsigned long old_features;
790 if (!dev || !netif_device_present(dev))
793 if (!dev->ethtool_ops)
796 if (copy_from_user(ðcmd, useraddr, sizeof (ethcmd)))
799 /* Allow some commands to be done by anyone */
801 case ETHTOOL_GDRVINFO:
802 case ETHTOOL_GMSGLVL:
803 case ETHTOOL_GCOALESCE:
804 case ETHTOOL_GRINGPARAM:
805 case ETHTOOL_GPAUSEPARAM:
806 case ETHTOOL_GRXCSUM:
807 case ETHTOOL_GTXCSUM:
809 case ETHTOOL_GSTRINGS:
811 case ETHTOOL_GPERMADDR:
815 case ETHTOOL_GPFLAGS:
818 if (!capable(CAP_NET_ADMIN))
822 if (dev->ethtool_ops->begin)
823 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
826 old_features = dev->features;
830 rc = ethtool_get_settings(dev, useraddr);
833 rc = ethtool_set_settings(dev, useraddr);
835 case ETHTOOL_GDRVINFO:
836 rc = ethtool_get_drvinfo(dev, useraddr);
839 rc = ethtool_get_regs(dev, useraddr);
842 rc = ethtool_get_wol(dev, useraddr);
845 rc = ethtool_set_wol(dev, useraddr);
847 case ETHTOOL_GMSGLVL:
848 rc = ethtool_get_value(dev, useraddr, ethcmd,
849 dev->ethtool_ops->get_msglevel);
851 case ETHTOOL_SMSGLVL:
852 rc = ethtool_set_value_void(dev, useraddr,
853 dev->ethtool_ops->set_msglevel);
855 case ETHTOOL_NWAY_RST:
856 rc = ethtool_nway_reset(dev);
859 rc = ethtool_get_value(dev, useraddr, ethcmd,
860 dev->ethtool_ops->get_link);
862 case ETHTOOL_GEEPROM:
863 rc = ethtool_get_eeprom(dev, useraddr);
865 case ETHTOOL_SEEPROM:
866 rc = ethtool_set_eeprom(dev, useraddr);
868 case ETHTOOL_GCOALESCE:
869 rc = ethtool_get_coalesce(dev, useraddr);
871 case ETHTOOL_SCOALESCE:
872 rc = ethtool_set_coalesce(dev, useraddr);
874 case ETHTOOL_GRINGPARAM:
875 rc = ethtool_get_ringparam(dev, useraddr);
877 case ETHTOOL_SRINGPARAM:
878 rc = ethtool_set_ringparam(dev, useraddr);
880 case ETHTOOL_GPAUSEPARAM:
881 rc = ethtool_get_pauseparam(dev, useraddr);
883 case ETHTOOL_SPAUSEPARAM:
884 rc = ethtool_set_pauseparam(dev, useraddr);
886 case ETHTOOL_GRXCSUM:
887 rc = ethtool_get_value(dev, useraddr, ethcmd,
888 dev->ethtool_ops->get_rx_csum);
890 case ETHTOOL_SRXCSUM:
891 rc = ethtool_set_value(dev, useraddr,
892 dev->ethtool_ops->set_rx_csum);
894 case ETHTOOL_GTXCSUM:
895 rc = ethtool_get_value(dev, useraddr, ethcmd,
896 (dev->ethtool_ops->get_tx_csum ?
897 dev->ethtool_ops->get_tx_csum :
898 ethtool_op_get_tx_csum));
900 case ETHTOOL_STXCSUM:
901 rc = ethtool_set_tx_csum(dev, useraddr);
904 rc = ethtool_get_value(dev, useraddr, ethcmd,
905 (dev->ethtool_ops->get_sg ?
906 dev->ethtool_ops->get_sg :
910 rc = ethtool_set_sg(dev, useraddr);
913 rc = ethtool_get_value(dev, useraddr, ethcmd,
914 (dev->ethtool_ops->get_tso ?
915 dev->ethtool_ops->get_tso :
916 ethtool_op_get_tso));
919 rc = ethtool_set_tso(dev, useraddr);
922 rc = ethtool_self_test(dev, useraddr);
924 case ETHTOOL_GSTRINGS:
925 rc = ethtool_get_strings(dev, useraddr);
927 case ETHTOOL_PHYS_ID:
928 rc = ethtool_phys_id(dev, useraddr);
931 rc = ethtool_get_stats(dev, useraddr);
933 case ETHTOOL_GPERMADDR:
934 rc = ethtool_get_perm_addr(dev, useraddr);
937 rc = ethtool_get_value(dev, useraddr, ethcmd,
938 (dev->ethtool_ops->get_ufo ?
939 dev->ethtool_ops->get_ufo :
940 ethtool_op_get_ufo));
943 rc = ethtool_set_ufo(dev, useraddr);
946 rc = ethtool_get_gso(dev, useraddr);
949 rc = ethtool_set_gso(dev, useraddr);
952 rc = ethtool_get_value(dev, useraddr, ethcmd,
953 dev->ethtool_ops->get_flags);
956 rc = ethtool_set_value(dev, useraddr,
957 dev->ethtool_ops->set_flags);
959 case ETHTOOL_GPFLAGS:
960 rc = ethtool_get_value(dev, useraddr, ethcmd,
961 dev->ethtool_ops->get_priv_flags);
963 case ETHTOOL_SPFLAGS:
964 rc = ethtool_set_value(dev, useraddr,
965 dev->ethtool_ops->set_priv_flags);
971 if (dev->ethtool_ops->complete)
972 dev->ethtool_ops->complete(dev);
974 if (old_features != dev->features)
975 netdev_features_change(dev);
980 EXPORT_SYMBOL(ethtool_op_get_link);
981 EXPORT_SYMBOL(ethtool_op_get_sg);
982 EXPORT_SYMBOL(ethtool_op_get_tso);
983 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
984 EXPORT_SYMBOL(ethtool_op_set_sg);
985 EXPORT_SYMBOL(ethtool_op_set_tso);
986 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
987 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
988 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
989 EXPORT_SYMBOL(ethtool_op_set_ufo);
990 EXPORT_SYMBOL(ethtool_op_get_ufo);
991 EXPORT_SYMBOL(ethtool_op_set_flags);
992 EXPORT_SYMBOL(ethtool_op_get_flags);