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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Matthew Wilcox61a44b92007-07-31 14:00:02 -07006 * the information ethtool needs.
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
Matthew Wilcox61a44b92007-07-31 14:00:02 -07008 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 */
13
14#include <linux/module.h>
15#include <linux/types.h>
Randy Dunlap4fc268d2006-01-11 12:17:47 -080016#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/errno.h>
18#include <linux/ethtool.h>
19#include <linux/netdevice.h>
Richard Cochranc8f3a8c2012-04-03 22:59:17 +000020#include <linux/net_tstamp.h>
21#include <linux/phy.h>
Jeff Garzikd17792e2010-03-04 08:21:53 +000022#include <linux/bitops.h>
chavey97f8aef2010-04-07 21:54:42 -070023#include <linux/uaccess.h>
David S. Miller73da16c2010-09-21 16:12:11 -070024#include <linux/vmalloc.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090025#include <linux/slab.h>
Ben Hutchings68f512f2011-04-02 00:35:15 +010026#include <linux/rtnetlink.h>
27#include <linux/sched.h>
Eric Dumazet960fb622014-11-16 06:23:05 -080028#include <linux/net.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
YOSHIFUJI Hideaki4ec93ed2007-02-09 23:24:36 +090030/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 * Some useful ethtool_ops methods that're device independent.
32 * If we find that all drivers want to do the same thing here,
33 * we can turn these into dev_() function calls.
34 */
35
36u32 ethtool_op_get_link(struct net_device *dev)
37{
38 return netif_carrier_ok(dev) ? 1 : 0;
39}
chavey97f8aef2010-04-07 21:54:42 -070040EXPORT_SYMBOL(ethtool_op_get_link);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Richard Cochran02eacbd2012-04-03 22:59:22 +000042int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
43{
44 info->so_timestamping =
45 SOF_TIMESTAMPING_TX_SOFTWARE |
46 SOF_TIMESTAMPING_RX_SOFTWARE |
47 SOF_TIMESTAMPING_SOFTWARE;
48 info->phc_index = -1;
49 return 0;
50}
51EXPORT_SYMBOL(ethtool_op_get_ts_info);
52
Linus Torvalds1da177e2005-04-16 15:20:36 -070053/* Handlers for each ethtool command */
54
Michał Mirosław475414f2011-11-15 15:29:55 +000055#define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
Michał Mirosław5455c692011-02-15 16:59:17 +000056
Michał Mirosław9d921542011-11-15 15:29:55 +000057static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {
58 [NETIF_F_SG_BIT] = "tx-scatter-gather",
59 [NETIF_F_IP_CSUM_BIT] = "tx-checksum-ipv4",
Michał Mirosław9d921542011-11-15 15:29:55 +000060 [NETIF_F_HW_CSUM_BIT] = "tx-checksum-ip-generic",
61 [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6",
62 [NETIF_F_HIGHDMA_BIT] = "highdma",
63 [NETIF_F_FRAGLIST_BIT] = "tx-scatter-gather-fraglist",
Fernando Luis Vazquez Cao788dfca2013-06-17 11:28:03 +090064 [NETIF_F_HW_VLAN_CTAG_TX_BIT] = "tx-vlan-hw-insert",
Michał Mirosław9d921542011-11-15 15:29:55 +000065
Fernando Luis Vazquez Cao788dfca2013-06-17 11:28:03 +090066 [NETIF_F_HW_VLAN_CTAG_RX_BIT] = "rx-vlan-hw-parse",
67 [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter",
David S. Miller2d6577f2013-04-19 16:08:23 -040068 [NETIF_F_HW_VLAN_STAG_TX_BIT] = "tx-vlan-stag-hw-insert",
69 [NETIF_F_HW_VLAN_STAG_RX_BIT] = "rx-vlan-stag-hw-parse",
70 [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter",
Michał Mirosław9d921542011-11-15 15:29:55 +000071 [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged",
72 [NETIF_F_GSO_BIT] = "tx-generic-segmentation",
73 [NETIF_F_LLTX_BIT] = "tx-lockless",
74 [NETIF_F_NETNS_LOCAL_BIT] = "netns-local",
75 [NETIF_F_GRO_BIT] = "rx-gro",
76 [NETIF_F_LRO_BIT] = "rx-lro",
77
78 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation",
79 [NETIF_F_UFO_BIT] = "tx-udp-fragmentation",
80 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust",
81 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation",
Alexander Duyckcbc53e02016-04-10 21:44:51 -040082 [NETIF_F_TSO_MANGLEID_BIT] = "tx-tcp-mangleid-segmentation",
Michał Mirosław9d921542011-11-15 15:29:55 +000083 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation",
84 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation",
Pravin B Shelar68c33162013-02-14 14:02:41 +000085 [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation",
Alexander Duyck518f2132016-04-10 21:44:44 -040086 [NETIF_F_GSO_GRE_CSUM_BIT] = "tx-gre-csum-segmentation",
Tom Herbert7e133182016-05-18 09:06:10 -070087 [NETIF_F_GSO_IPXIP4_BIT] = "tx-ipxip4-segmentation",
88 [NETIF_F_GSO_IPXIP6_BIT] = "tx-ipxip6-segmentation",
Pravin B Shelar73136262013-03-07 13:21:51 +000089 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation",
Alexander Duyck518f2132016-04-10 21:44:44 -040090 [NETIF_F_GSO_UDP_TUNNEL_CSUM_BIT] = "tx-udp_tnl-csum-segmentation",
Alexander Duyck802ab552016-04-10 21:45:03 -040091 [NETIF_F_GSO_PARTIAL_BIT] = "tx-gso-partial",
Marcelo Ricardo Leitner90017ac2016-06-02 15:05:43 -030092 [NETIF_F_GSO_SCTP_BIT] = "tx-sctp-segmentation",
Michał Mirosław9d921542011-11-15 15:29:55 +000093
94 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
Tom Herbert53692b12015-12-14 11:19:41 -080095 [NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
Michał Mirosław9d921542011-11-15 15:29:55 +000096 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
97 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
98 [NETIF_F_RXHASH_BIT] = "rx-hashing",
99 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
100 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
101 [NETIF_F_LOOPBACK_BIT] = "loopback",
Ben Greear36eabda32012-02-11 15:39:14 +0000102 [NETIF_F_RXFCS_BIT] = "rx-fcs",
Ben Greear5e0c03c2012-02-11 15:39:45 +0000103 [NETIF_F_RXALL_BIT] = "rx-all",
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800104 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
Jiri Pirkod0290212014-04-02 23:09:31 +0200105 [NETIF_F_BUSY_POLL_BIT] = "busy-poll",
John Fastabend1c78c642016-02-16 21:17:37 -0800106 [NETIF_F_HW_TC_BIT] = "hw-tc-offload",
Michał Mirosław9d921542011-11-15 15:29:55 +0000107};
108
Eyal Perry892311f2014-12-02 18:12:10 +0200109static const char
110rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
111 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
112 [ETH_RSS_HASH_XOR_BIT] = "xor",
113};
114
Hadar Hen Ziona4244b02015-06-11 10:28:16 +0300115static const char
116tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
117 [ETHTOOL_ID_UNSPEC] = "Unspec",
118 [ETHTOOL_RX_COPYBREAK] = "rx-copybreak",
119 [ETHTOOL_TX_COPYBREAK] = "tx-copybreak",
120};
121
Michał Mirosław5455c692011-02-15 16:59:17 +0000122static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
123{
124 struct ethtool_gfeatures cmd = {
125 .cmd = ETHTOOL_GFEATURES,
126 .size = ETHTOOL_DEV_FEATURE_WORDS,
127 };
Michał Mirosław475414f2011-11-15 15:29:55 +0000128 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
Michał Mirosław5455c692011-02-15 16:59:17 +0000129 u32 __user *sizeaddr;
130 u32 copy_size;
Michał Mirosław475414f2011-11-15 15:29:55 +0000131 int i;
132
133 /* in case feature bits run out again */
Michał Mirosław09da71b2011-11-16 14:32:03 +0000134 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
Michał Mirosław475414f2011-11-15 15:29:55 +0000135
136 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
Michał Mirosław09da71b2011-11-16 14:32:03 +0000137 features[i].available = (u32)(dev->hw_features >> (32 * i));
138 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
139 features[i].active = (u32)(dev->features >> (32 * i));
140 features[i].never_changed =
141 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
Michał Mirosław475414f2011-11-15 15:29:55 +0000142 }
Michał Mirosław5455c692011-02-15 16:59:17 +0000143
144 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
145 if (get_user(copy_size, sizeaddr))
146 return -EFAULT;
147
148 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
149 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
150
151 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
152 return -EFAULT;
153 useraddr += sizeof(cmd);
154 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
155 return -EFAULT;
156
157 return 0;
158}
159
160static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
161{
162 struct ethtool_sfeatures cmd;
163 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
Michał Mirosław475414f2011-11-15 15:29:55 +0000164 netdev_features_t wanted = 0, valid = 0;
165 int i, ret = 0;
Michał Mirosław5455c692011-02-15 16:59:17 +0000166
167 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
168 return -EFAULT;
169 useraddr += sizeof(cmd);
170
171 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
172 return -EINVAL;
173
174 if (copy_from_user(features, useraddr, sizeof(features)))
175 return -EFAULT;
176
Michał Mirosław475414f2011-11-15 15:29:55 +0000177 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
Michał Mirosław09da71b2011-11-16 14:32:03 +0000178 valid |= (netdev_features_t)features[i].valid << (32 * i);
179 wanted |= (netdev_features_t)features[i].requested << (32 * i);
Michał Mirosław475414f2011-11-15 15:29:55 +0000180 }
181
182 if (valid & ~NETIF_F_ETHTOOL_BITS)
Michał Mirosław5455c692011-02-15 16:59:17 +0000183 return -EINVAL;
184
Michał Mirosław475414f2011-11-15 15:29:55 +0000185 if (valid & ~dev->hw_features) {
186 valid &= dev->hw_features;
Michał Mirosław5455c692011-02-15 16:59:17 +0000187 ret |= ETHTOOL_F_UNSUPPORTED;
188 }
189
Michał Mirosław475414f2011-11-15 15:29:55 +0000190 dev->wanted_features &= ~valid;
191 dev->wanted_features |= wanted & valid;
Michał Mirosław6cb6a272011-04-02 22:48:47 -0700192 __netdev_update_features(dev);
Michał Mirosław5455c692011-02-15 16:59:17 +0000193
Michał Mirosław475414f2011-11-15 15:29:55 +0000194 if ((dev->wanted_features ^ dev->features) & valid)
Michał Mirosław5455c692011-02-15 16:59:17 +0000195 ret |= ETHTOOL_F_WISH;
196
197 return ret;
198}
199
Andrew Lunnf3a40942015-12-30 16:28:25 +0100200static int phy_get_sset_count(struct phy_device *phydev)
201{
202 int ret;
203
204 if (phydev->drv->get_sset_count &&
205 phydev->drv->get_strings &&
206 phydev->drv->get_stats) {
207 mutex_lock(&phydev->lock);
208 ret = phydev->drv->get_sset_count(phydev);
209 mutex_unlock(&phydev->lock);
210
211 return ret;
212 }
213
214 return -EOPNOTSUPP;
215}
216
Michał Mirosław340ae162011-02-15 16:59:16 +0000217static int __ethtool_get_sset_count(struct net_device *dev, int sset)
218{
219 const struct ethtool_ops *ops = dev->ethtool_ops;
220
Michał Mirosław5455c692011-02-15 16:59:17 +0000221 if (sset == ETH_SS_FEATURES)
222 return ARRAY_SIZE(netdev_features_strings);
223
Eyal Perry892311f2014-12-02 18:12:10 +0200224 if (sset == ETH_SS_RSS_HASH_FUNCS)
225 return ARRAY_SIZE(rss_hash_func_strings);
226
Hadar Hen Ziona4244b02015-06-11 10:28:16 +0300227 if (sset == ETH_SS_TUNABLES)
228 return ARRAY_SIZE(tunable_strings);
229
Andrew Lunnf3a40942015-12-30 16:28:25 +0100230 if (sset == ETH_SS_PHY_STATS) {
231 if (dev->phydev)
232 return phy_get_sset_count(dev->phydev);
233 else
234 return -EOPNOTSUPP;
235 }
236
Jiri Pirkoc03a14e2013-01-07 09:02:08 +0000237 if (ops->get_sset_count && ops->get_strings)
Michał Mirosław340ae162011-02-15 16:59:16 +0000238 return ops->get_sset_count(dev, sset);
239 else
240 return -EOPNOTSUPP;
241}
242
243static void __ethtool_get_strings(struct net_device *dev,
244 u32 stringset, u8 *data)
245{
246 const struct ethtool_ops *ops = dev->ethtool_ops;
247
Michał Mirosław5455c692011-02-15 16:59:17 +0000248 if (stringset == ETH_SS_FEATURES)
249 memcpy(data, netdev_features_strings,
250 sizeof(netdev_features_strings));
Eyal Perry892311f2014-12-02 18:12:10 +0200251 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
252 memcpy(data, rss_hash_func_strings,
253 sizeof(rss_hash_func_strings));
Hadar Hen Ziona4244b02015-06-11 10:28:16 +0300254 else if (stringset == ETH_SS_TUNABLES)
255 memcpy(data, tunable_strings, sizeof(tunable_strings));
Andrew Lunnf3a40942015-12-30 16:28:25 +0100256 else if (stringset == ETH_SS_PHY_STATS) {
257 struct phy_device *phydev = dev->phydev;
258
259 if (phydev) {
260 mutex_lock(&phydev->lock);
261 phydev->drv->get_strings(phydev, data);
262 mutex_unlock(&phydev->lock);
263 } else {
264 return;
265 }
266 } else
Michał Mirosław5455c692011-02-15 16:59:17 +0000267 /* ops->get_strings is valid because checked earlier */
268 ops->get_strings(dev, stringset, data);
Michał Mirosław340ae162011-02-15 16:59:16 +0000269}
270
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000271static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
Michał Mirosław0a417702011-02-15 16:59:17 +0000272{
273 /* feature masks of legacy discrete ethtool ops */
274
275 switch (eth_cmd) {
276 case ETHTOOL_GTXCSUM:
277 case ETHTOOL_STXCSUM:
Tom Herberta1882222015-12-14 11:19:43 -0800278 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
Michał Mirosławe83d3602011-02-15 16:59:18 +0000279 case ETHTOOL_GRXCSUM:
280 case ETHTOOL_SRXCSUM:
281 return NETIF_F_RXCSUM;
Michał Mirosław0a417702011-02-15 16:59:17 +0000282 case ETHTOOL_GSG:
283 case ETHTOOL_SSG:
284 return NETIF_F_SG;
285 case ETHTOOL_GTSO:
286 case ETHTOOL_STSO:
287 return NETIF_F_ALL_TSO;
288 case ETHTOOL_GUFO:
289 case ETHTOOL_SUFO:
290 return NETIF_F_UFO;
291 case ETHTOOL_GGSO:
292 case ETHTOOL_SGSO:
293 return NETIF_F_GSO;
294 case ETHTOOL_GGRO:
295 case ETHTOOL_SGRO:
296 return NETIF_F_GRO;
297 default:
298 BUG();
299 }
300}
301
Michał Mirosław0a417702011-02-15 16:59:17 +0000302static int ethtool_get_one_feature(struct net_device *dev,
303 char __user *useraddr, u32 ethcmd)
304{
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000305 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
Michał Mirosław0a417702011-02-15 16:59:17 +0000306 struct ethtool_value edata = {
307 .cmd = ethcmd,
Michał Mirosław86794882011-02-15 16:59:17 +0000308 .data = !!(dev->features & mask),
Michał Mirosław0a417702011-02-15 16:59:17 +0000309 };
Michał Mirosław0a417702011-02-15 16:59:17 +0000310
Michał Mirosław0a417702011-02-15 16:59:17 +0000311 if (copy_to_user(useraddr, &edata, sizeof(edata)))
312 return -EFAULT;
313 return 0;
314}
315
Michał Mirosław0a417702011-02-15 16:59:17 +0000316static int ethtool_set_one_feature(struct net_device *dev,
317 void __user *useraddr, u32 ethcmd)
318{
319 struct ethtool_value edata;
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000320 netdev_features_t mask;
Michał Mirosław0a417702011-02-15 16:59:17 +0000321
322 if (copy_from_user(&edata, useraddr, sizeof(edata)))
323 return -EFAULT;
324
Michał Mirosław86794882011-02-15 16:59:17 +0000325 mask = ethtool_get_feature_mask(ethcmd);
326 mask &= dev->hw_features;
Michał Mirosławbc5787c62011-11-15 15:29:55 +0000327 if (!mask)
Michał Mirosław0a417702011-02-15 16:59:17 +0000328 return -EOPNOTSUPP;
Michał Mirosławbc5787c62011-11-15 15:29:55 +0000329
330 if (edata.data)
331 dev->wanted_features |= mask;
332 else
333 dev->wanted_features &= ~mask;
334
335 __netdev_update_features(dev);
336
337 return 0;
Michał Mirosław0a417702011-02-15 16:59:17 +0000338}
339
Michał Mirosław02b3a552011-11-15 15:29:55 +0000340#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
341 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
Patrick McHardyf6469682013-04-19 02:04:27 +0000342#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
343 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
344 NETIF_F_RXHASH)
Michał Mirosławbc5787c62011-11-15 15:29:55 +0000345
346static u32 __ethtool_get_flags(struct net_device *dev)
347{
Michał Mirosław02b3a552011-11-15 15:29:55 +0000348 u32 flags = 0;
349
Dragos Foianu8a731252013-07-13 14:43:00 +0100350 if (dev->features & NETIF_F_LRO)
351 flags |= ETH_FLAG_LRO;
352 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
353 flags |= ETH_FLAG_RXVLAN;
354 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
355 flags |= ETH_FLAG_TXVLAN;
356 if (dev->features & NETIF_F_NTUPLE)
357 flags |= ETH_FLAG_NTUPLE;
358 if (dev->features & NETIF_F_RXHASH)
359 flags |= ETH_FLAG_RXHASH;
Michał Mirosław02b3a552011-11-15 15:29:55 +0000360
361 return flags;
Michał Mirosławbc5787c62011-11-15 15:29:55 +0000362}
363
364static int __ethtool_set_flags(struct net_device *dev, u32 data)
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000365{
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000366 netdev_features_t features = 0, changed;
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000367
Michał Mirosław02b3a552011-11-15 15:29:55 +0000368 if (data & ~ETH_ALL_FLAGS)
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000369 return -EINVAL;
370
Dragos Foianu8a731252013-07-13 14:43:00 +0100371 if (data & ETH_FLAG_LRO)
372 features |= NETIF_F_LRO;
373 if (data & ETH_FLAG_RXVLAN)
374 features |= NETIF_F_HW_VLAN_CTAG_RX;
375 if (data & ETH_FLAG_TXVLAN)
376 features |= NETIF_F_HW_VLAN_CTAG_TX;
377 if (data & ETH_FLAG_NTUPLE)
378 features |= NETIF_F_NTUPLE;
379 if (data & ETH_FLAG_RXHASH)
380 features |= NETIF_F_RXHASH;
Michał Mirosław02b3a552011-11-15 15:29:55 +0000381
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000382 /* allow changing only bits set in hw_features */
Michał Mirosław02b3a552011-11-15 15:29:55 +0000383 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000384 if (changed & ~dev->hw_features)
385 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
386
387 dev->wanted_features =
Michał Mirosław02b3a552011-11-15 15:29:55 +0000388 (dev->wanted_features & ~changed) | (features & changed);
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000389
Michał Mirosław6cb6a272011-04-02 22:48:47 -0700390 __netdev_update_features(dev);
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000391
392 return 0;
393}
394
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200395void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
396 u32 legacy_u32)
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800397{
398 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
399 dst[0] = legacy_u32;
400}
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200401EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800402
403/* return false if src had higher bits set. lower bits always updated. */
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200404bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
405 const unsigned long *src)
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800406{
407 bool retval = true;
408
409 /* TODO: following test will soon always be true */
410 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
411 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
412
413 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
414 bitmap_fill(ext, 32);
415 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
416 if (bitmap_intersects(ext, src,
417 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
418 /* src mask goes beyond bit 31 */
419 retval = false;
420 }
421 }
422 *legacy_u32 = src[0];
423 return retval;
424}
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200425EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800426
427/* return false if legacy contained non-0 deprecated fields
428 * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
429 */
430static bool
431convert_legacy_settings_to_link_ksettings(
432 struct ethtool_link_ksettings *link_ksettings,
433 const struct ethtool_cmd *legacy_settings)
434{
435 bool retval = true;
436
437 memset(link_ksettings, 0, sizeof(*link_ksettings));
438
439 /* This is used to tell users that driver is still using these
440 * deprecated legacy fields, and they should not use
441 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
442 */
443 if (legacy_settings->transceiver ||
444 legacy_settings->maxtxpkt ||
445 legacy_settings->maxrxpkt)
446 retval = false;
447
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200448 ethtool_convert_legacy_u32_to_link_mode(
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800449 link_ksettings->link_modes.supported,
450 legacy_settings->supported);
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200451 ethtool_convert_legacy_u32_to_link_mode(
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800452 link_ksettings->link_modes.advertising,
453 legacy_settings->advertising);
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200454 ethtool_convert_legacy_u32_to_link_mode(
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800455 link_ksettings->link_modes.lp_advertising,
456 legacy_settings->lp_advertising);
457 link_ksettings->base.speed
458 = ethtool_cmd_speed(legacy_settings);
459 link_ksettings->base.duplex
460 = legacy_settings->duplex;
461 link_ksettings->base.port
462 = legacy_settings->port;
463 link_ksettings->base.phy_address
464 = legacy_settings->phy_address;
465 link_ksettings->base.autoneg
466 = legacy_settings->autoneg;
467 link_ksettings->base.mdio_support
468 = legacy_settings->mdio_support;
469 link_ksettings->base.eth_tp_mdix
470 = legacy_settings->eth_tp_mdix;
471 link_ksettings->base.eth_tp_mdix_ctrl
472 = legacy_settings->eth_tp_mdix_ctrl;
473 return retval;
474}
475
476/* return false if ksettings link modes had higher bits
477 * set. legacy_settings always updated (best effort)
478 */
479static bool
480convert_link_ksettings_to_legacy_settings(
481 struct ethtool_cmd *legacy_settings,
482 const struct ethtool_link_ksettings *link_ksettings)
483{
484 bool retval = true;
485
486 memset(legacy_settings, 0, sizeof(*legacy_settings));
487 /* this also clears the deprecated fields in legacy structure:
488 * __u8 transceiver;
489 * __u32 maxtxpkt;
490 * __u32 maxrxpkt;
491 */
492
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200493 retval &= ethtool_convert_link_mode_to_legacy_u32(
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800494 &legacy_settings->supported,
495 link_ksettings->link_modes.supported);
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200496 retval &= ethtool_convert_link_mode_to_legacy_u32(
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800497 &legacy_settings->advertising,
498 link_ksettings->link_modes.advertising);
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200499 retval &= ethtool_convert_link_mode_to_legacy_u32(
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800500 &legacy_settings->lp_advertising,
501 link_ksettings->link_modes.lp_advertising);
502 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
503 legacy_settings->duplex
504 = link_ksettings->base.duplex;
505 legacy_settings->port
506 = link_ksettings->base.port;
507 legacy_settings->phy_address
508 = link_ksettings->base.phy_address;
509 legacy_settings->autoneg
510 = link_ksettings->base.autoneg;
511 legacy_settings->mdio_support
512 = link_ksettings->base.mdio_support;
513 legacy_settings->eth_tp_mdix
514 = link_ksettings->base.eth_tp_mdix;
515 legacy_settings->eth_tp_mdix_ctrl
516 = link_ksettings->base.eth_tp_mdix_ctrl;
517 return retval;
518}
519
520/* number of 32-bit words to store the user's link mode bitmaps */
521#define __ETHTOOL_LINK_MODE_MASK_NU32 \
522 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
523
524/* layout of the struct passed from/to userland */
525struct ethtool_link_usettings {
526 struct ethtool_link_settings base;
527 struct {
528 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
529 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
530 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
531 } link_modes;
532};
533
534/* Internal kernel helper to query a device ethtool_link_settings.
535 *
536 * Backward compatibility note: for compatibility with legacy drivers
537 * that implement only the ethtool_cmd API, this has to work with both
538 * drivers implementing get_link_ksettings API and drivers
539 * implementing get_settings API. When drivers implement get_settings
540 * and report ethtool_cmd deprecated fields
541 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
542 * because the resulting struct ethtool_link_settings does not report them.
543 */
544int __ethtool_get_link_ksettings(struct net_device *dev,
545 struct ethtool_link_ksettings *link_ksettings)
546{
547 int err;
548 struct ethtool_cmd cmd;
549
550 ASSERT_RTNL();
551
552 if (dev->ethtool_ops->get_link_ksettings) {
553 memset(link_ksettings, 0, sizeof(*link_ksettings));
554 return dev->ethtool_ops->get_link_ksettings(dev,
555 link_ksettings);
556 }
557
558 /* driver doesn't support %ethtool_link_ksettings API. revert to
559 * legacy %ethtool_cmd API, unless it's not supported either.
560 * TODO: remove when ethtool_ops::get_settings disappears internally
561 */
David Decotigny3237fc62016-02-24 10:58:11 -0800562 if (!dev->ethtool_ops->get_settings)
563 return -EOPNOTSUPP;
564
565 memset(&cmd, 0, sizeof(cmd));
566 cmd.cmd = ETHTOOL_GSET;
567 err = dev->ethtool_ops->get_settings(dev, &cmd);
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800568 if (err < 0)
569 return err;
570
571 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
572 */
573 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
574 return err;
575}
576EXPORT_SYMBOL(__ethtool_get_link_ksettings);
577
578/* convert ethtool_link_usettings in user space to a kernel internal
579 * ethtool_link_ksettings. return 0 on success, errno on error.
580 */
581static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
582 const void __user *from)
583{
584 struct ethtool_link_usettings link_usettings;
585
586 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
587 return -EFAULT;
588
589 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
590 bitmap_from_u32array(to->link_modes.supported,
591 __ETHTOOL_LINK_MODE_MASK_NBITS,
592 link_usettings.link_modes.supported,
593 __ETHTOOL_LINK_MODE_MASK_NU32);
594 bitmap_from_u32array(to->link_modes.advertising,
595 __ETHTOOL_LINK_MODE_MASK_NBITS,
596 link_usettings.link_modes.advertising,
597 __ETHTOOL_LINK_MODE_MASK_NU32);
598 bitmap_from_u32array(to->link_modes.lp_advertising,
599 __ETHTOOL_LINK_MODE_MASK_NBITS,
600 link_usettings.link_modes.lp_advertising,
601 __ETHTOOL_LINK_MODE_MASK_NU32);
602
603 return 0;
604}
605
606/* convert a kernel internal ethtool_link_ksettings to
607 * ethtool_link_usettings in user space. return 0 on success, errno on
608 * error.
609 */
610static int
611store_link_ksettings_for_user(void __user *to,
612 const struct ethtool_link_ksettings *from)
613{
614 struct ethtool_link_usettings link_usettings;
615
616 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
617 bitmap_to_u32array(link_usettings.link_modes.supported,
618 __ETHTOOL_LINK_MODE_MASK_NU32,
619 from->link_modes.supported,
620 __ETHTOOL_LINK_MODE_MASK_NBITS);
621 bitmap_to_u32array(link_usettings.link_modes.advertising,
622 __ETHTOOL_LINK_MODE_MASK_NU32,
623 from->link_modes.advertising,
624 __ETHTOOL_LINK_MODE_MASK_NBITS);
625 bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
626 __ETHTOOL_LINK_MODE_MASK_NU32,
627 from->link_modes.lp_advertising,
628 __ETHTOOL_LINK_MODE_MASK_NBITS);
629
630 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
631 return -EFAULT;
632
633 return 0;
634}
635
636/* Query device for its ethtool_link_settings.
637 *
638 * Backward compatibility note: this function must fail when driver
639 * does not implement ethtool::get_link_ksettings, even if legacy
640 * ethtool_ops::get_settings is implemented. This tells new versions
641 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
642 * this driver, so that they can correctly access the ethtool_cmd
643 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
644 * implements ethtool_ops::get_settings anymore.
645 */
646static int ethtool_get_link_ksettings(struct net_device *dev,
647 void __user *useraddr)
648{
649 int err = 0;
650 struct ethtool_link_ksettings link_ksettings;
651
652 ASSERT_RTNL();
653
654 if (!dev->ethtool_ops->get_link_ksettings)
655 return -EOPNOTSUPP;
656
657 /* handle bitmap nbits handshake */
658 if (copy_from_user(&link_ksettings.base, useraddr,
659 sizeof(link_ksettings.base)))
660 return -EFAULT;
661
662 if (__ETHTOOL_LINK_MODE_MASK_NU32
663 != link_ksettings.base.link_mode_masks_nwords) {
664 /* wrong link mode nbits requested */
665 memset(&link_ksettings, 0, sizeof(link_ksettings));
Ben Hutchings793cf872016-03-14 01:05:38 +0000666 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800667 /* send back number of words required as negative val */
668 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
669 "need too many bits for link modes!");
670 link_ksettings.base.link_mode_masks_nwords
671 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
672
673 /* copy the base fields back to user, not the link
674 * mode bitmaps
675 */
676 if (copy_to_user(useraddr, &link_ksettings.base,
677 sizeof(link_ksettings.base)))
678 return -EFAULT;
679
680 return 0;
681 }
682
683 /* handshake successful: user/kernel agree on
684 * link_mode_masks_nwords
685 */
686
687 memset(&link_ksettings, 0, sizeof(link_ksettings));
688 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
689 if (err < 0)
690 return err;
691
692 /* make sure we tell the right values to user */
693 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
694 link_ksettings.base.link_mode_masks_nwords
695 = __ETHTOOL_LINK_MODE_MASK_NU32;
696
697 return store_link_ksettings_for_user(useraddr, &link_ksettings);
698}
699
700/* Update device ethtool_link_settings.
701 *
702 * Backward compatibility note: this function must fail when driver
703 * does not implement ethtool::set_link_ksettings, even if legacy
704 * ethtool_ops::set_settings is implemented. This tells new versions
705 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
706 * this driver, so that they can correctly update the ethtool_cmd
707 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
708 * implements ethtool_ops::get_settings anymore.
709 */
710static int ethtool_set_link_ksettings(struct net_device *dev,
711 void __user *useraddr)
712{
713 int err;
714 struct ethtool_link_ksettings link_ksettings;
715
716 ASSERT_RTNL();
717
718 if (!dev->ethtool_ops->set_link_ksettings)
719 return -EOPNOTSUPP;
720
721 /* make sure nbits field has expected value */
722 if (copy_from_user(&link_ksettings.base, useraddr,
723 sizeof(link_ksettings.base)))
724 return -EFAULT;
725
726 if (__ETHTOOL_LINK_MODE_MASK_NU32
727 != link_ksettings.base.link_mode_masks_nwords)
728 return -EINVAL;
729
730 /* copy the whole structure, now that we know it has expected
731 * format
732 */
733 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
734 if (err)
735 return err;
736
737 /* re-check nwords field, just in case */
738 if (__ETHTOOL_LINK_MODE_MASK_NU32
739 != link_ksettings.base.link_mode_masks_nwords)
740 return -EINVAL;
741
742 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
743}
744
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800745static void
746warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
747{
748 char name[sizeof(current->comm)];
749
750 pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
751 get_task_comm(name, current), details);
752}
753
754/* Query device for its ethtool_cmd settings.
755 *
756 * Backward compatibility note: for compatibility with legacy ethtool,
757 * this has to work with both drivers implementing get_link_ksettings
758 * API and drivers implementing get_settings API. When drivers
759 * implement get_link_ksettings and report higher link mode bits, a
760 * kernel warning is logged once (with name of 1st driver/device) to
761 * recommend user to upgrade ethtool, but the command is successful
762 * (only the lower link mode bits reported back to user).
763 */
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000764static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
765{
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000766 struct ethtool_cmd cmd;
767
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800768 ASSERT_RTNL();
769
770 if (dev->ethtool_ops->get_link_ksettings) {
771 /* First, use link_ksettings API if it is supported */
772 int err;
773 struct ethtool_link_ksettings link_ksettings;
774
775 memset(&link_ksettings, 0, sizeof(link_ksettings));
776 err = dev->ethtool_ops->get_link_ksettings(dev,
777 &link_ksettings);
778 if (err < 0)
779 return err;
780 if (!convert_link_ksettings_to_legacy_settings(&cmd,
781 &link_ksettings))
782 warn_incomplete_ethtool_legacy_settings_conversion(
783 "link modes are only partially reported");
784
785 /* send a sensible cmd tag back to user */
786 cmd.cmd = ETHTOOL_GSET;
787 } else {
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800788 /* driver doesn't support %ethtool_link_ksettings
789 * API. revert to legacy %ethtool_cmd API, unless it's
790 * not supported either.
791 */
David Decotigny3237fc62016-02-24 10:58:11 -0800792 int err;
793
794 if (!dev->ethtool_ops->get_settings)
795 return -EOPNOTSUPP;
796
797 memset(&cmd, 0, sizeof(cmd));
798 cmd.cmd = ETHTOOL_GSET;
799 err = dev->ethtool_ops->get_settings(dev, &cmd);
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800800 if (err < 0)
801 return err;
802 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803
804 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
805 return -EFAULT;
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800806
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 return 0;
808}
809
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800810/* Update device link settings with given ethtool_cmd.
811 *
812 * Backward compatibility note: for compatibility with legacy ethtool,
813 * this has to work with both drivers implementing set_link_ksettings
814 * API and drivers implementing set_settings API. When drivers
815 * implement set_link_ksettings and user's request updates deprecated
816 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
817 * warning is logged once (with name of 1st driver/device) to
818 * recommend user to upgrade ethtool, and the request is rejected.
819 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
821{
822 struct ethtool_cmd cmd;
823
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800824 ASSERT_RTNL();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
826 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
827 return -EFAULT;
828
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800829 /* first, try new %ethtool_link_ksettings API. */
830 if (dev->ethtool_ops->set_link_ksettings) {
831 struct ethtool_link_ksettings link_ksettings;
832
833 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
834 &cmd))
835 return -EINVAL;
836
837 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
838 link_ksettings.base.link_mode_masks_nwords
839 = __ETHTOOL_LINK_MODE_MASK_NU32;
840 return dev->ethtool_ops->set_link_ksettings(dev,
841 &link_ksettings);
842 }
843
844 /* legacy %ethtool_cmd API */
845
846 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
847 * disappears internally
848 */
849
850 if (!dev->ethtool_ops->set_settings)
851 return -EOPNOTSUPP;
852
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 return dev->ethtool_ops->set_settings(dev, &cmd);
854}
855
chavey97f8aef2010-04-07 21:54:42 -0700856static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
857 void __user *useraddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858{
859 struct ethtool_drvinfo info;
Stephen Hemminger76fd8592006-09-08 11:16:13 -0700860 const struct ethtool_ops *ops = dev->ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 memset(&info, 0, sizeof(info));
863 info.cmd = ETHTOOL_GDRVINFO;
Jiri Pirkoc03a14e2013-01-07 09:02:08 +0000864 if (ops->get_drvinfo) {
Ben Hutchings01414802010-08-17 02:31:15 -0700865 ops->get_drvinfo(dev, &info);
866 } else if (dev->dev.parent && dev->dev.parent->driver) {
867 strlcpy(info.bus_info, dev_name(dev->dev.parent),
868 sizeof(info.bus_info));
869 strlcpy(info.driver, dev->dev.parent->driver->name,
870 sizeof(info.driver));
871 } else {
872 return -EOPNOTSUPP;
873 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
Jeff Garzik723b2f52010-03-03 22:51:50 +0000875 /*
876 * this method of obtaining string set info is deprecated;
Jeff Garzikd17792e2010-03-04 08:21:53 +0000877 * Use ETHTOOL_GSSET_INFO instead.
Jeff Garzik723b2f52010-03-03 22:51:50 +0000878 */
Jiri Pirkoc03a14e2013-01-07 09:02:08 +0000879 if (ops->get_sset_count) {
Jeff Garzikff03d492007-08-15 16:01:08 -0700880 int rc;
881
882 rc = ops->get_sset_count(dev, ETH_SS_TEST);
883 if (rc >= 0)
884 info.testinfo_len = rc;
885 rc = ops->get_sset_count(dev, ETH_SS_STATS);
886 if (rc >= 0)
887 info.n_stats = rc;
Jeff Garzik339bf022007-08-15 16:01:32 -0700888 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
889 if (rc >= 0)
890 info.n_priv_flags = rc;
Jeff Garzikff03d492007-08-15 16:01:08 -0700891 }
Jiri Pirkoc03a14e2013-01-07 09:02:08 +0000892 if (ops->get_regs_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 info.regdump_len = ops->get_regs_len(dev);
Jiri Pirkoc03a14e2013-01-07 09:02:08 +0000894 if (ops->get_eeprom_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 info.eedump_len = ops->get_eeprom_len(dev);
896
897 if (copy_to_user(useraddr, &info, sizeof(info)))
898 return -EFAULT;
899 return 0;
900}
901
Eric Dumazetf5c445e2010-03-08 12:17:04 -0800902static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
chavey97f8aef2010-04-07 21:54:42 -0700903 void __user *useraddr)
Jeff Garzik723b2f52010-03-03 22:51:50 +0000904{
905 struct ethtool_sset_info info;
Jeff Garzik723b2f52010-03-03 22:51:50 +0000906 u64 sset_mask;
907 int i, idx = 0, n_bits = 0, ret, rc;
908 u32 *info_buf = NULL;
909
Jeff Garzik723b2f52010-03-03 22:51:50 +0000910 if (copy_from_user(&info, useraddr, sizeof(info)))
911 return -EFAULT;
912
913 /* store copy of mask, because we zero struct later on */
914 sset_mask = info.sset_mask;
915 if (!sset_mask)
916 return 0;
917
918 /* calculate size of return buffer */
Jeff Garzikd17792e2010-03-04 08:21:53 +0000919 n_bits = hweight64(sset_mask);
Jeff Garzik723b2f52010-03-03 22:51:50 +0000920
921 memset(&info, 0, sizeof(info));
922 info.cmd = ETHTOOL_GSSET_INFO;
923
924 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
925 if (!info_buf)
926 return -ENOMEM;
927
928 /*
929 * fill return buffer based on input bitmask and successful
930 * get_sset_count return
931 */
932 for (i = 0; i < 64; i++) {
933 if (!(sset_mask & (1ULL << i)))
934 continue;
935
Michał Mirosław340ae162011-02-15 16:59:16 +0000936 rc = __ethtool_get_sset_count(dev, i);
Jeff Garzik723b2f52010-03-03 22:51:50 +0000937 if (rc >= 0) {
938 info.sset_mask |= (1ULL << i);
939 info_buf[idx++] = rc;
940 }
941 }
942
943 ret = -EFAULT;
944 if (copy_to_user(useraddr, &info, sizeof(info)))
945 goto out;
946
947 useraddr += offsetof(struct ethtool_sset_info, data);
948 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
949 goto out;
950
951 ret = 0;
952
953out:
954 kfree(info_buf);
955 return ret;
956}
957
chavey97f8aef2010-04-07 21:54:42 -0700958static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
Ben Hutchingsbf988432010-06-28 08:45:58 +0000959 u32 cmd, void __user *useraddr)
Santwona Behera0853ad62008-07-02 03:47:41 -0700960{
Ben Hutchingsbf988432010-06-28 08:45:58 +0000961 struct ethtool_rxnfc info;
962 size_t info_size = sizeof(info);
Ben Hutchings55664f32012-01-03 12:04:51 +0000963 int rc;
Santwona Behera0853ad62008-07-02 03:47:41 -0700964
Santwona Behera59089d82009-02-20 00:58:13 -0800965 if (!dev->ethtool_ops->set_rxnfc)
Santwona Behera0853ad62008-07-02 03:47:41 -0700966 return -EOPNOTSUPP;
967
Ben Hutchingsbf988432010-06-28 08:45:58 +0000968 /* struct ethtool_rxnfc was originally defined for
969 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
970 * members. User-space might still be using that
971 * definition. */
972 if (cmd == ETHTOOL_SRXFH)
973 info_size = (offsetof(struct ethtool_rxnfc, data) +
974 sizeof(info.data));
975
976 if (copy_from_user(&info, useraddr, info_size))
Santwona Behera0853ad62008-07-02 03:47:41 -0700977 return -EFAULT;
978
Ben Hutchings55664f32012-01-03 12:04:51 +0000979 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
980 if (rc)
981 return rc;
982
983 if (cmd == ETHTOOL_SRXCLSRLINS &&
984 copy_to_user(useraddr, &info, info_size))
985 return -EFAULT;
986
987 return 0;
Santwona Behera0853ad62008-07-02 03:47:41 -0700988}
989
chavey97f8aef2010-04-07 21:54:42 -0700990static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
Ben Hutchingsbf988432010-06-28 08:45:58 +0000991 u32 cmd, void __user *useraddr)
Santwona Behera0853ad62008-07-02 03:47:41 -0700992{
993 struct ethtool_rxnfc info;
Ben Hutchingsbf988432010-06-28 08:45:58 +0000994 size_t info_size = sizeof(info);
Santwona Behera59089d82009-02-20 00:58:13 -0800995 const struct ethtool_ops *ops = dev->ethtool_ops;
996 int ret;
997 void *rule_buf = NULL;
Santwona Behera0853ad62008-07-02 03:47:41 -0700998
Santwona Behera59089d82009-02-20 00:58:13 -0800999 if (!ops->get_rxnfc)
Santwona Behera0853ad62008-07-02 03:47:41 -07001000 return -EOPNOTSUPP;
1001
Ben Hutchingsbf988432010-06-28 08:45:58 +00001002 /* struct ethtool_rxnfc was originally defined for
1003 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1004 * members. User-space might still be using that
1005 * definition. */
1006 if (cmd == ETHTOOL_GRXFH)
1007 info_size = (offsetof(struct ethtool_rxnfc, data) +
1008 sizeof(info.data));
1009
1010 if (copy_from_user(&info, useraddr, info_size))
Santwona Behera0853ad62008-07-02 03:47:41 -07001011 return -EFAULT;
1012
Santwona Behera59089d82009-02-20 00:58:13 -08001013 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1014 if (info.rule_cnt > 0) {
Ben Hutchingsdb048b62010-06-28 08:44:07 +00001015 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
Kees Cookae6df5f2010-10-07 10:03:48 +00001016 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
Ben Hutchingsdb048b62010-06-28 08:44:07 +00001017 GFP_USER);
Santwona Behera59089d82009-02-20 00:58:13 -08001018 if (!rule_buf)
1019 return -ENOMEM;
1020 }
1021 }
Santwona Behera0853ad62008-07-02 03:47:41 -07001022
Santwona Behera59089d82009-02-20 00:58:13 -08001023 ret = ops->get_rxnfc(dev, &info, rule_buf);
1024 if (ret < 0)
1025 goto err_out;
1026
1027 ret = -EFAULT;
Ben Hutchingsbf988432010-06-28 08:45:58 +00001028 if (copy_to_user(useraddr, &info, info_size))
Santwona Behera59089d82009-02-20 00:58:13 -08001029 goto err_out;
1030
1031 if (rule_buf) {
1032 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1033 if (copy_to_user(useraddr, rule_buf,
1034 info.rule_cnt * sizeof(u32)))
1035 goto err_out;
1036 }
1037 ret = 0;
1038
1039err_out:
Wei Yongjunc9cacec2009-03-31 15:06:26 -07001040 kfree(rule_buf);
Santwona Behera59089d82009-02-20 00:58:13 -08001041
1042 return ret;
Santwona Behera0853ad62008-07-02 03:47:41 -07001043}
1044
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301045static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1046 struct ethtool_rxnfc *rx_rings,
1047 u32 size)
1048{
Ben Hutchingsfb95cd82014-05-15 00:46:45 +01001049 int i;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301050
1051 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
Ben Hutchingsfb95cd82014-05-15 00:46:45 +01001052 return -EFAULT;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301053
1054 /* Validate ring indices */
Ben Hutchingsfb95cd82014-05-15 00:46:45 +01001055 for (i = 0; i < size; i++)
1056 if (indir[i] >= rx_rings->data)
1057 return -EINVAL;
1058
1059 return 0;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301060}
1061
Kim Jonesba905f52016-02-02 03:51:16 +00001062u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
Eric Dumazet960fb622014-11-16 06:23:05 -08001063
1064void netdev_rss_key_fill(void *buffer, size_t len)
1065{
1066 BUG_ON(len > sizeof(netdev_rss_key));
1067 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1068 memcpy(buffer, netdev_rss_key, len);
1069}
1070EXPORT_SYMBOL(netdev_rss_key_fill);
1071
Keller, Jacob Ed4ab4282016-02-08 16:05:03 -08001072static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1073{
1074 u32 dev_size, current_max = 0;
1075 u32 *indir;
1076 int ret;
1077
1078 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1079 !dev->ethtool_ops->get_rxfh)
1080 return -EOPNOTSUPP;
1081 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1082 if (dev_size == 0)
1083 return -EOPNOTSUPP;
1084
1085 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1086 if (!indir)
1087 return -ENOMEM;
1088
1089 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1090 if (ret)
1091 goto out;
1092
1093 while (dev_size--)
1094 current_max = max(current_max, indir[dev_size]);
1095
1096 *max = current_max;
1097
1098out:
1099 kfree(indir);
1100 return ret;
1101}
1102
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001103static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1104 void __user *useraddr)
1105{
Ben Hutchings7850f632011-12-15 13:55:01 +00001106 u32 user_size, dev_size;
1107 u32 *indir;
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001108 int ret;
1109
Ben Hutchings7850f632011-12-15 13:55:01 +00001110 if (!dev->ethtool_ops->get_rxfh_indir_size ||
Ben Hutchingsfe62d002014-05-15 01:25:27 +01001111 !dev->ethtool_ops->get_rxfh)
Ben Hutchings7850f632011-12-15 13:55:01 +00001112 return -EOPNOTSUPP;
1113 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1114 if (dev_size == 0)
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001115 return -EOPNOTSUPP;
1116
Ben Hutchings7850f632011-12-15 13:55:01 +00001117 if (copy_from_user(&user_size,
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001118 useraddr + offsetof(struct ethtool_rxfh_indir, size),
Ben Hutchings7850f632011-12-15 13:55:01 +00001119 sizeof(user_size)))
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001120 return -EFAULT;
1121
Ben Hutchings7850f632011-12-15 13:55:01 +00001122 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1123 &dev_size, sizeof(dev_size)))
1124 return -EFAULT;
1125
1126 /* If the user buffer size is 0, this is just a query for the
1127 * device table size. Otherwise, if it's smaller than the
1128 * device table size it's an error.
1129 */
1130 if (user_size < dev_size)
1131 return user_size == 0 ? 0 : -EINVAL;
1132
1133 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001134 if (!indir)
1135 return -ENOMEM;
1136
Eyal Perry892311f2014-12-02 18:12:10 +02001137 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001138 if (ret)
1139 goto out;
1140
Ben Hutchings7850f632011-12-15 13:55:01 +00001141 if (copy_to_user(useraddr +
1142 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1143 indir, dev_size * sizeof(indir[0])))
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001144 ret = -EFAULT;
1145
1146out:
1147 kfree(indir);
1148 return ret;
1149}
1150
1151static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1152 void __user *useraddr)
1153{
Ben Hutchings7850f632011-12-15 13:55:01 +00001154 struct ethtool_rxnfc rx_rings;
1155 u32 user_size, dev_size, i;
1156 u32 *indir;
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001157 const struct ethtool_ops *ops = dev->ethtool_ops;
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001158 int ret;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301159 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001160
Ben Hutchingsfe62d002014-05-15 01:25:27 +01001161 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001162 !ops->get_rxnfc)
Ben Hutchings7850f632011-12-15 13:55:01 +00001163 return -EOPNOTSUPP;
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001164
1165 dev_size = ops->get_rxfh_indir_size(dev);
Ben Hutchings7850f632011-12-15 13:55:01 +00001166 if (dev_size == 0)
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001167 return -EOPNOTSUPP;
1168
Ben Hutchings7850f632011-12-15 13:55:01 +00001169 if (copy_from_user(&user_size,
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001170 useraddr + offsetof(struct ethtool_rxfh_indir, size),
Ben Hutchings7850f632011-12-15 13:55:01 +00001171 sizeof(user_size)))
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001172 return -EFAULT;
1173
Ben Hutchings278bc422011-12-15 13:56:49 +00001174 if (user_size != 0 && user_size != dev_size)
Ben Hutchings7850f632011-12-15 13:55:01 +00001175 return -EINVAL;
1176
1177 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001178 if (!indir)
1179 return -ENOMEM;
1180
Ben Hutchings7850f632011-12-15 13:55:01 +00001181 rx_rings.cmd = ETHTOOL_GRXRINGS;
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001182 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
Ben Hutchings7850f632011-12-15 13:55:01 +00001183 if (ret)
1184 goto out;
Ben Hutchings278bc422011-12-15 13:56:49 +00001185
1186 if (user_size == 0) {
1187 for (i = 0; i < dev_size; i++)
1188 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1189 } else {
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301190 ret = ethtool_copy_validate_indir(indir,
1191 useraddr + ringidx_offset,
1192 &rx_rings,
1193 dev_size);
1194 if (ret)
Ben Hutchings7850f632011-12-15 13:55:01 +00001195 goto out;
Ben Hutchings7850f632011-12-15 13:55:01 +00001196 }
1197
Eyal Perry892311f2014-12-02 18:12:10 +02001198 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
Keller, Jacob Ed4ab4282016-02-08 16:05:03 -08001199 if (ret)
1200 goto out;
1201
1202 /* indicate whether rxfh was set to default */
1203 if (user_size == 0)
1204 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1205 else
1206 dev->priv_flags |= IFF_RXFH_CONFIGURED;
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001207
1208out:
1209 kfree(indir);
1210 return ret;
1211}
1212
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301213static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1214 void __user *useraddr)
1215{
1216 int ret;
1217 const struct ethtool_ops *ops = dev->ethtool_ops;
Ben Hutchingsf062a382014-05-15 16:28:07 +01001218 u32 user_indir_size, user_key_size;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301219 u32 dev_indir_size = 0, dev_key_size = 0;
Ben Hutchingsf062a382014-05-15 16:28:07 +01001220 struct ethtool_rxfh rxfh;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301221 u32 total_size;
Ben Hutchingsf062a382014-05-15 16:28:07 +01001222 u32 indir_bytes;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301223 u32 *indir = NULL;
Eyal Perry892311f2014-12-02 18:12:10 +02001224 u8 dev_hfunc = 0;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301225 u8 *hkey = NULL;
1226 u8 *rss_config;
1227
Eyal Perry892311f2014-12-02 18:12:10 +02001228 if (!ops->get_rxfh)
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301229 return -EOPNOTSUPP;
1230
1231 if (ops->get_rxfh_indir_size)
1232 dev_indir_size = ops->get_rxfh_indir_size(dev);
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301233 if (ops->get_rxfh_key_size)
1234 dev_key_size = ops->get_rxfh_key_size(dev);
1235
Ben Hutchingsf062a382014-05-15 16:28:07 +01001236 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301237 return -EFAULT;
Ben Hutchingsf062a382014-05-15 16:28:07 +01001238 user_indir_size = rxfh.indir_size;
1239 user_key_size = rxfh.key_size;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301240
Ben Hutchingsf062a382014-05-15 16:28:07 +01001241 /* Check that reserved fields are 0 for now */
Eyal Perry892311f2014-12-02 18:12:10 +02001242 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1243 rxfh.rsvd8[2] || rxfh.rsvd32)
Ben Hutchingsf062a382014-05-15 16:28:07 +01001244 return -EINVAL;
1245
1246 rxfh.indir_size = dev_indir_size;
1247 rxfh.key_size = dev_key_size;
1248 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301249 return -EFAULT;
1250
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301251 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1252 (user_key_size && (user_key_size != dev_key_size)))
1253 return -EINVAL;
1254
1255 indir_bytes = user_indir_size * sizeof(indir[0]);
1256 total_size = indir_bytes + user_key_size;
1257 rss_config = kzalloc(total_size, GFP_USER);
1258 if (!rss_config)
1259 return -ENOMEM;
1260
1261 if (user_indir_size)
1262 indir = (u32 *)rss_config;
1263
1264 if (user_key_size)
1265 hkey = rss_config + indir_bytes;
1266
Eyal Perry892311f2014-12-02 18:12:10 +02001267 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1268 if (ret)
1269 goto out;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301270
Eyal Perry892311f2014-12-02 18:12:10 +02001271 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1272 &dev_hfunc, sizeof(rxfh.hfunc))) {
1273 ret = -EFAULT;
1274 } else if (copy_to_user(useraddr +
1275 offsetof(struct ethtool_rxfh, rss_config[0]),
1276 rss_config, total_size)) {
1277 ret = -EFAULT;
1278 }
1279out:
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301280 kfree(rss_config);
1281
1282 return ret;
1283}
1284
1285static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1286 void __user *useraddr)
1287{
1288 int ret;
1289 const struct ethtool_ops *ops = dev->ethtool_ops;
1290 struct ethtool_rxnfc rx_rings;
Ben Hutchingsf062a382014-05-15 16:28:07 +01001291 struct ethtool_rxfh rxfh;
1292 u32 dev_indir_size = 0, dev_key_size = 0, i;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301293 u32 *indir = NULL, indir_bytes = 0;
1294 u8 *hkey = NULL;
1295 u8 *rss_config;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301296 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1297
Eyal Perry892311f2014-12-02 18:12:10 +02001298 if (!ops->get_rxnfc || !ops->set_rxfh)
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301299 return -EOPNOTSUPP;
1300
1301 if (ops->get_rxfh_indir_size)
1302 dev_indir_size = ops->get_rxfh_indir_size(dev);
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301303 if (ops->get_rxfh_key_size)
Dan Carpenterd340c862015-02-20 13:54:05 +03001304 dev_key_size = ops->get_rxfh_key_size(dev);
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301305
Ben Hutchingsf062a382014-05-15 16:28:07 +01001306 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301307 return -EFAULT;
1308
Ben Hutchingsf062a382014-05-15 16:28:07 +01001309 /* Check that reserved fields are 0 for now */
Eyal Perry892311f2014-12-02 18:12:10 +02001310 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1311 rxfh.rsvd8[2] || rxfh.rsvd32)
Ben Hutchingsf062a382014-05-15 16:28:07 +01001312 return -EINVAL;
1313
Eyal Perry892311f2014-12-02 18:12:10 +02001314 /* If either indir, hash key or function is valid, proceed further.
1315 * Must request at least one change: indir size, hash key or function.
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301316 */
Ben Hutchingsf062a382014-05-15 16:28:07 +01001317 if ((rxfh.indir_size &&
1318 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1319 rxfh.indir_size != dev_indir_size) ||
1320 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1321 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
Eyal Perry892311f2014-12-02 18:12:10 +02001322 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301323 return -EINVAL;
1324
Ben Hutchingsf062a382014-05-15 16:28:07 +01001325 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301326 indir_bytes = dev_indir_size * sizeof(indir[0]);
1327
Ben Hutchingsf062a382014-05-15 16:28:07 +01001328 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301329 if (!rss_config)
1330 return -ENOMEM;
1331
1332 rx_rings.cmd = ETHTOOL_GRXRINGS;
1333 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1334 if (ret)
1335 goto out;
1336
Ben Hutchingsf062a382014-05-15 16:28:07 +01001337 /* rxfh.indir_size == 0 means reset the indir table to default.
1338 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301339 */
Ben Hutchingsf062a382014-05-15 16:28:07 +01001340 if (rxfh.indir_size &&
1341 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301342 indir = (u32 *)rss_config;
1343 ret = ethtool_copy_validate_indir(indir,
1344 useraddr + rss_cfg_offset,
1345 &rx_rings,
Ben Hutchingsf062a382014-05-15 16:28:07 +01001346 rxfh.indir_size);
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301347 if (ret)
1348 goto out;
Ben Hutchingsf062a382014-05-15 16:28:07 +01001349 } else if (rxfh.indir_size == 0) {
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301350 indir = (u32 *)rss_config;
1351 for (i = 0; i < dev_indir_size; i++)
1352 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1353 }
1354
Ben Hutchingsf062a382014-05-15 16:28:07 +01001355 if (rxfh.key_size) {
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301356 hkey = rss_config + indir_bytes;
1357 if (copy_from_user(hkey,
1358 useraddr + rss_cfg_offset + indir_bytes,
Ben Hutchingsf062a382014-05-15 16:28:07 +01001359 rxfh.key_size)) {
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301360 ret = -EFAULT;
1361 goto out;
1362 }
1363 }
1364
Eyal Perry892311f2014-12-02 18:12:10 +02001365 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
Keller, Jacob Ed4ab4282016-02-08 16:05:03 -08001366 if (ret)
1367 goto out;
1368
1369 /* indicate whether rxfh was set to default */
1370 if (rxfh.indir_size == 0)
1371 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1372 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1373 dev->priv_flags |= IFF_RXFH_CONFIGURED;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301374
1375out:
1376 kfree(rss_config);
1377 return ret;
1378}
1379
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1381{
1382 struct ethtool_regs regs;
Stephen Hemminger76fd8592006-09-08 11:16:13 -07001383 const struct ethtool_ops *ops = dev->ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 void *regbuf;
1385 int reglen, ret;
1386
1387 if (!ops->get_regs || !ops->get_regs_len)
1388 return -EOPNOTSUPP;
1389
1390 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1391 return -EFAULT;
1392
1393 reglen = ops->get_regs_len(dev);
1394 if (regs.len > reglen)
1395 regs.len = reglen;
1396
Stanislaw Gruszka2fba4f52017-05-23 21:53:59 -04001397 regbuf = NULL;
1398 if (reglen) {
1399 regbuf = vzalloc(reglen);
1400 if (!regbuf)
1401 return -ENOMEM;
1402 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403
1404 ops->get_regs(dev, &regs, regbuf);
1405
1406 ret = -EFAULT;
1407 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1408 goto out;
1409 useraddr += offsetof(struct ethtool_regs, data);
Ben Hutchings67ae7cf2011-07-21 15:25:30 -07001410 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411 goto out;
1412 ret = 0;
1413
1414 out:
Ben Hutchingsa77f5db2010-09-20 08:42:17 +00001415 vfree(regbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416 return ret;
1417}
1418
Ben Hutchingsd73d3a82009-10-05 10:59:58 +00001419static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1420{
1421 struct ethtool_value reset;
1422 int ret;
1423
1424 if (!dev->ethtool_ops->reset)
1425 return -EOPNOTSUPP;
1426
1427 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1428 return -EFAULT;
1429
1430 ret = dev->ethtool_ops->reset(dev, &reset.data);
1431 if (ret)
1432 return ret;
1433
1434 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1435 return -EFAULT;
1436 return 0;
1437}
1438
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1440{
Roland Dreier8e557422010-02-11 12:14:23 -08001441 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442
1443 if (!dev->ethtool_ops->get_wol)
1444 return -EOPNOTSUPP;
1445
1446 dev->ethtool_ops->get_wol(dev, &wol);
1447
1448 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1449 return -EFAULT;
1450 return 0;
1451}
1452
1453static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1454{
1455 struct ethtool_wolinfo wol;
1456
1457 if (!dev->ethtool_ops->set_wol)
1458 return -EOPNOTSUPP;
1459
1460 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1461 return -EFAULT;
1462
1463 return dev->ethtool_ops->set_wol(dev, &wol);
1464}
1465
Yuval Mintz80f12ec2012-06-06 17:13:06 +00001466static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1467{
1468 struct ethtool_eee edata;
1469 int rc;
1470
1471 if (!dev->ethtool_ops->get_eee)
1472 return -EOPNOTSUPP;
1473
1474 memset(&edata, 0, sizeof(struct ethtool_eee));
1475 edata.cmd = ETHTOOL_GEEE;
1476 rc = dev->ethtool_ops->get_eee(dev, &edata);
1477
1478 if (rc)
1479 return rc;
1480
1481 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1482 return -EFAULT;
1483
1484 return 0;
1485}
1486
1487static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1488{
1489 struct ethtool_eee edata;
1490
1491 if (!dev->ethtool_ops->set_eee)
1492 return -EOPNOTSUPP;
1493
1494 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1495 return -EFAULT;
1496
1497 return dev->ethtool_ops->set_eee(dev, &edata);
1498}
1499
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500static int ethtool_nway_reset(struct net_device *dev)
1501{
1502 if (!dev->ethtool_ops->nway_reset)
1503 return -EOPNOTSUPP;
1504
1505 return dev->ethtool_ops->nway_reset(dev);
1506}
1507
Ben Hutchingse596e6e2010-12-09 12:08:35 +00001508static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1509{
1510 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1511
1512 if (!dev->ethtool_ops->get_link)
1513 return -EOPNOTSUPP;
1514
1515 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1516
1517 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1518 return -EFAULT;
1519 return 0;
1520}
1521
Ben Hutchings081d0942012-04-12 00:42:12 +00001522static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1523 int (*getter)(struct net_device *,
1524 struct ethtool_eeprom *, u8 *),
1525 u32 total_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526{
1527 struct ethtool_eeprom eeprom;
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001528 void __user *userbuf = useraddr + sizeof(eeprom);
1529 u32 bytes_remaining;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530 u8 *data;
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001531 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1534 return -EFAULT;
1535
1536 /* Check for wrap and zero */
1537 if (eeprom.offset + eeprom.len <= eeprom.offset)
1538 return -EINVAL;
1539
1540 /* Check for exceeding total eeprom len */
Ben Hutchings081d0942012-04-12 00:42:12 +00001541 if (eeprom.offset + eeprom.len > total_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542 return -EINVAL;
1543
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001544 data = kmalloc(PAGE_SIZE, GFP_USER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545 if (!data)
1546 return -ENOMEM;
1547
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001548 bytes_remaining = eeprom.len;
1549 while (bytes_remaining > 0) {
1550 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551
Ben Hutchings081d0942012-04-12 00:42:12 +00001552 ret = getter(dev, &eeprom, data);
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001553 if (ret)
1554 break;
1555 if (copy_to_user(userbuf, data, eeprom.len)) {
1556 ret = -EFAULT;
1557 break;
1558 }
1559 userbuf += eeprom.len;
1560 eeprom.offset += eeprom.len;
1561 bytes_remaining -= eeprom.len;
1562 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563
Mandeep Singh Bainesc5835df2008-04-24 20:55:56 -07001564 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1565 eeprom.offset -= eeprom.len;
1566 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1567 ret = -EFAULT;
1568
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569 kfree(data);
1570 return ret;
1571}
1572
Ben Hutchings081d0942012-04-12 00:42:12 +00001573static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1574{
1575 const struct ethtool_ops *ops = dev->ethtool_ops;
1576
Guenter Roecke0fb6fb2014-10-30 20:50:15 -07001577 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1578 !ops->get_eeprom_len(dev))
Ben Hutchings081d0942012-04-12 00:42:12 +00001579 return -EOPNOTSUPP;
1580
1581 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1582 ops->get_eeprom_len(dev));
1583}
1584
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1586{
1587 struct ethtool_eeprom eeprom;
Stephen Hemminger76fd8592006-09-08 11:16:13 -07001588 const struct ethtool_ops *ops = dev->ethtool_ops;
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001589 void __user *userbuf = useraddr + sizeof(eeprom);
1590 u32 bytes_remaining;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591 u8 *data;
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001592 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593
Guenter Roecke0fb6fb2014-10-30 20:50:15 -07001594 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1595 !ops->get_eeprom_len(dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596 return -EOPNOTSUPP;
1597
1598 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1599 return -EFAULT;
1600
1601 /* Check for wrap and zero */
1602 if (eeprom.offset + eeprom.len <= eeprom.offset)
1603 return -EINVAL;
1604
1605 /* Check for exceeding total eeprom len */
1606 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1607 return -EINVAL;
1608
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001609 data = kmalloc(PAGE_SIZE, GFP_USER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610 if (!data)
1611 return -ENOMEM;
1612
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001613 bytes_remaining = eeprom.len;
1614 while (bytes_remaining > 0) {
1615 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001617 if (copy_from_user(data, userbuf, eeprom.len)) {
1618 ret = -EFAULT;
1619 break;
1620 }
1621 ret = ops->set_eeprom(dev, &eeprom, data);
1622 if (ret)
1623 break;
1624 userbuf += eeprom.len;
1625 eeprom.offset += eeprom.len;
1626 bytes_remaining -= eeprom.len;
1627 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629 kfree(data);
1630 return ret;
1631}
1632
chavey97f8aef2010-04-07 21:54:42 -07001633static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1634 void __user *useraddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635{
Roland Dreier8e557422010-02-11 12:14:23 -08001636 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637
1638 if (!dev->ethtool_ops->get_coalesce)
1639 return -EOPNOTSUPP;
1640
1641 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1642
1643 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1644 return -EFAULT;
1645 return 0;
1646}
1647
chavey97f8aef2010-04-07 21:54:42 -07001648static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1649 void __user *useraddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650{
1651 struct ethtool_coalesce coalesce;
1652
David S. Millerfa04ae52005-06-06 15:07:19 -07001653 if (!dev->ethtool_ops->set_coalesce)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654 return -EOPNOTSUPP;
1655
1656 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1657 return -EFAULT;
1658
1659 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1660}
1661
1662static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1663{
Roland Dreier8e557422010-02-11 12:14:23 -08001664 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665
1666 if (!dev->ethtool_ops->get_ringparam)
1667 return -EOPNOTSUPP;
1668
1669 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1670
1671 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1672 return -EFAULT;
1673 return 0;
1674}
1675
1676static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1677{
1678 struct ethtool_ringparam ringparam;
1679
1680 if (!dev->ethtool_ops->set_ringparam)
1681 return -EOPNOTSUPP;
1682
1683 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1684 return -EFAULT;
1685
1686 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1687}
1688
amit salecha8b5933c2011-04-07 01:58:42 +00001689static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1690 void __user *useraddr)
1691{
1692 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1693
1694 if (!dev->ethtool_ops->get_channels)
1695 return -EOPNOTSUPP;
1696
1697 dev->ethtool_ops->get_channels(dev, &channels);
1698
1699 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1700 return -EFAULT;
1701 return 0;
1702}
1703
1704static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1705 void __user *useraddr)
1706{
Eran Ben Elisha5dcd0852017-01-17 19:19:17 +02001707 struct ethtool_channels channels, max = { .cmd = ETHTOOL_GCHANNELS };
Keller, Jacob Ed4ab4282016-02-08 16:05:03 -08001708 u32 max_rx_in_use = 0;
amit salecha8b5933c2011-04-07 01:58:42 +00001709
Keller, Jacob E8bf36862016-02-08 16:05:04 -08001710 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
amit salecha8b5933c2011-04-07 01:58:42 +00001711 return -EOPNOTSUPP;
1712
1713 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1714 return -EFAULT;
1715
Keller, Jacob E8bf36862016-02-08 16:05:04 -08001716 dev->ethtool_ops->get_channels(dev, &max);
1717
1718 /* ensure new counts are within the maximums */
1719 if ((channels.rx_count > max.max_rx) ||
1720 (channels.tx_count > max.max_tx) ||
1721 (channels.combined_count > max.max_combined) ||
1722 (channels.other_count > max.max_other))
1723 return -EINVAL;
1724
Keller, Jacob Ed4ab4282016-02-08 16:05:03 -08001725 /* ensure the new Rx count fits within the configured Rx flow
1726 * indirection table settings */
1727 if (netif_is_rxfh_configured(dev) &&
1728 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1729 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1730 return -EINVAL;
1731
amit salecha8b5933c2011-04-07 01:58:42 +00001732 return dev->ethtool_ops->set_channels(dev, &channels);
1733}
1734
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1736{
1737 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1738
1739 if (!dev->ethtool_ops->get_pauseparam)
1740 return -EOPNOTSUPP;
1741
1742 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1743
1744 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1745 return -EFAULT;
1746 return 0;
1747}
1748
1749static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1750{
1751 struct ethtool_pauseparam pauseparam;
1752
Jeff Garzike1b90c42006-07-17 12:54:40 -04001753 if (!dev->ethtool_ops->set_pauseparam)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 return -EOPNOTSUPP;
1755
1756 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1757 return -EFAULT;
1758
1759 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1760}
1761
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1763{
1764 struct ethtool_test test;
Stephen Hemminger76fd8592006-09-08 11:16:13 -07001765 const struct ethtool_ops *ops = dev->ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766 u64 *data;
Jeff Garzikff03d492007-08-15 16:01:08 -07001767 int ret, test_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768
Ben Hutchingsa9828ec2009-10-01 11:33:03 +00001769 if (!ops->self_test || !ops->get_sset_count)
Jeff Garzikff03d492007-08-15 16:01:08 -07001770 return -EOPNOTSUPP;
1771
Ben Hutchingsa9828ec2009-10-01 11:33:03 +00001772 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
Jeff Garzikff03d492007-08-15 16:01:08 -07001773 if (test_len < 0)
1774 return test_len;
1775 WARN_ON(test_len == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776
1777 if (copy_from_user(&test, useraddr, sizeof(test)))
1778 return -EFAULT;
1779
Jeff Garzikff03d492007-08-15 16:01:08 -07001780 test.len = test_len;
1781 data = kmalloc(test_len * sizeof(u64), GFP_USER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782 if (!data)
1783 return -ENOMEM;
1784
1785 ops->self_test(dev, &test, data);
1786
1787 ret = -EFAULT;
1788 if (copy_to_user(useraddr, &test, sizeof(test)))
1789 goto out;
1790 useraddr += sizeof(test);
1791 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1792 goto out;
1793 ret = 0;
1794
1795 out:
1796 kfree(data);
1797 return ret;
1798}
1799
1800static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1801{
1802 struct ethtool_gstrings gstrings;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001803 u8 *data;
1804 int ret;
1805
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1807 return -EFAULT;
1808
Michał Mirosław340ae162011-02-15 16:59:16 +00001809 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
Ben Hutchingsa9828ec2009-10-01 11:33:03 +00001810 if (ret < 0)
1811 return ret;
Jeff Garzikff03d492007-08-15 16:01:08 -07001812
Ben Hutchingsa9828ec2009-10-01 11:33:03 +00001813 gstrings.len = ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814
Joe Perches077cb372015-10-14 01:09:40 -07001815 data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816 if (!data)
1817 return -ENOMEM;
1818
Michał Mirosław340ae162011-02-15 16:59:16 +00001819 __ethtool_get_strings(dev, gstrings.string_set, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001820
1821 ret = -EFAULT;
1822 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1823 goto out;
1824 useraddr += sizeof(gstrings);
1825 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1826 goto out;
1827 ret = 0;
1828
Michał Mirosław340ae162011-02-15 16:59:16 +00001829out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001830 kfree(data);
1831 return ret;
1832}
1833
1834static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1835{
1836 struct ethtool_value id;
Ben Hutchings68f512f2011-04-02 00:35:15 +01001837 static bool busy;
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001838 const struct ethtool_ops *ops = dev->ethtool_ops;
Ben Hutchings68f512f2011-04-02 00:35:15 +01001839 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001841 if (!ops->set_phys_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842 return -EOPNOTSUPP;
1843
Ben Hutchings68f512f2011-04-02 00:35:15 +01001844 if (busy)
1845 return -EBUSY;
1846
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847 if (copy_from_user(&id, useraddr, sizeof(id)))
1848 return -EFAULT;
1849
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001850 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
Allan, Bruce Wfce55922011-04-13 13:09:10 +00001851 if (rc < 0)
Ben Hutchings68f512f2011-04-02 00:35:15 +01001852 return rc;
1853
1854 /* Drop the RTNL lock while waiting, but prevent reentry or
1855 * removal of the device.
1856 */
1857 busy = true;
1858 dev_hold(dev);
1859 rtnl_unlock();
1860
1861 if (rc == 0) {
1862 /* Driver will handle this itself */
1863 schedule_timeout_interruptible(
Allan, Bruce W143780c2011-04-11 13:01:59 +00001864 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
Ben Hutchings68f512f2011-04-02 00:35:15 +01001865 } else {
Allan, Bruce Wfce55922011-04-13 13:09:10 +00001866 /* Driver expects to be called at twice the frequency in rc */
1867 int n = rc * 2, i, interval = HZ / n;
Ben Hutchings68f512f2011-04-02 00:35:15 +01001868
Allan, Bruce Wfce55922011-04-13 13:09:10 +00001869 /* Count down seconds */
1870 do {
1871 /* Count down iterations per second */
1872 i = n;
1873 do {
1874 rtnl_lock();
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001875 rc = ops->set_phys_id(dev,
Allan, Bruce Wfce55922011-04-13 13:09:10 +00001876 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1877 rtnl_unlock();
1878 if (rc)
1879 break;
1880 schedule_timeout_interruptible(interval);
1881 } while (!signal_pending(current) && --i != 0);
Ben Hutchings68f512f2011-04-02 00:35:15 +01001882 } while (!signal_pending(current) &&
1883 (id.data == 0 || --id.data != 0));
1884 }
1885
1886 rtnl_lock();
1887 dev_put(dev);
1888 busy = false;
1889
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001890 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
Ben Hutchings68f512f2011-04-02 00:35:15 +01001891 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001892}
1893
1894static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1895{
1896 struct ethtool_stats stats;
Stephen Hemminger76fd8592006-09-08 11:16:13 -07001897 const struct ethtool_ops *ops = dev->ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898 u64 *data;
Jeff Garzikff03d492007-08-15 16:01:08 -07001899 int ret, n_stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900
Ben Hutchingsa9828ec2009-10-01 11:33:03 +00001901 if (!ops->get_ethtool_stats || !ops->get_sset_count)
Jeff Garzikff03d492007-08-15 16:01:08 -07001902 return -EOPNOTSUPP;
1903
Ben Hutchingsa9828ec2009-10-01 11:33:03 +00001904 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
Jeff Garzikff03d492007-08-15 16:01:08 -07001905 if (n_stats < 0)
1906 return n_stats;
1907 WARN_ON(n_stats == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908
1909 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1910 return -EFAULT;
1911
Jeff Garzikff03d492007-08-15 16:01:08 -07001912 stats.n_stats = n_stats;
1913 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 if (!data)
1915 return -ENOMEM;
1916
1917 ops->get_ethtool_stats(dev, &stats, data);
1918
1919 ret = -EFAULT;
1920 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1921 goto out;
1922 useraddr += sizeof(stats);
1923 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1924 goto out;
1925 ret = 0;
1926
1927 out:
1928 kfree(data);
1929 return ret;
1930}
1931
Andrew Lunnf3a40942015-12-30 16:28:25 +01001932static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1933{
1934 struct ethtool_stats stats;
1935 struct phy_device *phydev = dev->phydev;
1936 u64 *data;
1937 int ret, n_stats;
1938
1939 if (!phydev)
1940 return -EOPNOTSUPP;
1941
1942 n_stats = phy_get_sset_count(phydev);
1943
1944 if (n_stats < 0)
1945 return n_stats;
1946 WARN_ON(n_stats == 0);
1947
1948 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1949 return -EFAULT;
1950
1951 stats.n_stats = n_stats;
1952 data = kmalloc_array(n_stats, sizeof(u64), GFP_USER);
1953 if (!data)
1954 return -ENOMEM;
1955
1956 mutex_lock(&phydev->lock);
1957 phydev->drv->get_stats(phydev, &stats, data);
1958 mutex_unlock(&phydev->lock);
1959
1960 ret = -EFAULT;
1961 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1962 goto out;
1963 useraddr += sizeof(stats);
1964 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1965 goto out;
1966 ret = 0;
1967
1968 out:
1969 kfree(data);
1970 return ret;
1971}
1972
viro@ftp.linux.org.uk0bf0519d2005-09-05 03:26:18 +01001973static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
Jon Wetzela6f9a702005-08-20 17:15:54 -07001974{
1975 struct ethtool_perm_addr epaddr;
Jon Wetzela6f9a702005-08-20 17:15:54 -07001976
Matthew Wilcox313674a2007-07-31 14:00:29 -07001977 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
Jon Wetzela6f9a702005-08-20 17:15:54 -07001978 return -EFAULT;
1979
Matthew Wilcox313674a2007-07-31 14:00:29 -07001980 if (epaddr.size < dev->addr_len)
1981 return -ETOOSMALL;
1982 epaddr.size = dev->addr_len;
Jon Wetzela6f9a702005-08-20 17:15:54 -07001983
Jon Wetzela6f9a702005-08-20 17:15:54 -07001984 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
Matthew Wilcox313674a2007-07-31 14:00:29 -07001985 return -EFAULT;
Jon Wetzela6f9a702005-08-20 17:15:54 -07001986 useraddr += sizeof(epaddr);
Matthew Wilcox313674a2007-07-31 14:00:29 -07001987 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1988 return -EFAULT;
1989 return 0;
Jon Wetzela6f9a702005-08-20 17:15:54 -07001990}
1991
Jeff Garzik13c99b22007-08-15 16:01:56 -07001992static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1993 u32 cmd, u32 (*actor)(struct net_device *))
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07001994{
Roland Dreier8e557422010-02-11 12:14:23 -08001995 struct ethtool_value edata = { .cmd = cmd };
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07001996
Jeff Garzik13c99b22007-08-15 16:01:56 -07001997 if (!actor)
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07001998 return -EOPNOTSUPP;
1999
Jeff Garzik13c99b22007-08-15 16:01:56 -07002000 edata.data = actor(dev);
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07002001
2002 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2003 return -EFAULT;
2004 return 0;
2005}
2006
Jeff Garzik13c99b22007-08-15 16:01:56 -07002007static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2008 void (*actor)(struct net_device *, u32))
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07002009{
2010 struct ethtool_value edata;
2011
Jeff Garzik13c99b22007-08-15 16:01:56 -07002012 if (!actor)
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07002013 return -EOPNOTSUPP;
2014
2015 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2016 return -EFAULT;
2017
Jeff Garzik13c99b22007-08-15 16:01:56 -07002018 actor(dev, edata.data);
Jeff Garzik339bf022007-08-15 16:01:32 -07002019 return 0;
2020}
2021
Jeff Garzik13c99b22007-08-15 16:01:56 -07002022static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2023 int (*actor)(struct net_device *, u32))
Jeff Garzik339bf022007-08-15 16:01:32 -07002024{
2025 struct ethtool_value edata;
2026
Jeff Garzik13c99b22007-08-15 16:01:56 -07002027 if (!actor)
Jeff Garzik339bf022007-08-15 16:01:32 -07002028 return -EOPNOTSUPP;
2029
2030 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2031 return -EFAULT;
2032
Jeff Garzik13c99b22007-08-15 16:01:56 -07002033 return actor(dev, edata.data);
Jeff Garzik339bf022007-08-15 16:01:32 -07002034}
2035
chavey97f8aef2010-04-07 21:54:42 -07002036static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2037 char __user *useraddr)
Ajit Khaparde05c6a8d2009-09-02 17:02:55 +00002038{
2039 struct ethtool_flash efl;
2040
2041 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2042 return -EFAULT;
2043
2044 if (!dev->ethtool_ops->flash_device)
2045 return -EOPNOTSUPP;
2046
Ben Hutchings786f5282012-02-01 09:32:25 +00002047 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2048
Ajit Khaparde05c6a8d2009-09-02 17:02:55 +00002049 return dev->ethtool_ops->flash_device(dev, &efl);
2050}
2051
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002052static int ethtool_set_dump(struct net_device *dev,
2053 void __user *useraddr)
2054{
2055 struct ethtool_dump dump;
2056
2057 if (!dev->ethtool_ops->set_dump)
2058 return -EOPNOTSUPP;
2059
2060 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2061 return -EFAULT;
2062
2063 return dev->ethtool_ops->set_dump(dev, &dump);
2064}
2065
2066static int ethtool_get_dump_flag(struct net_device *dev,
2067 void __user *useraddr)
2068{
2069 int ret;
2070 struct ethtool_dump dump;
2071 const struct ethtool_ops *ops = dev->ethtool_ops;
2072
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00002073 if (!ops->get_dump_flag)
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002074 return -EOPNOTSUPP;
2075
2076 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2077 return -EFAULT;
2078
2079 ret = ops->get_dump_flag(dev, &dump);
2080 if (ret)
2081 return ret;
2082
2083 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2084 return -EFAULT;
2085 return 0;
2086}
2087
2088static int ethtool_get_dump_data(struct net_device *dev,
2089 void __user *useraddr)
2090{
2091 int ret;
2092 __u32 len;
2093 struct ethtool_dump dump, tmp;
2094 const struct ethtool_ops *ops = dev->ethtool_ops;
2095 void *data = NULL;
2096
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00002097 if (!ops->get_dump_data || !ops->get_dump_flag)
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002098 return -EOPNOTSUPP;
2099
2100 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2101 return -EFAULT;
2102
2103 memset(&tmp, 0, sizeof(tmp));
2104 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2105 ret = ops->get_dump_flag(dev, &tmp);
2106 if (ret)
2107 return ret;
2108
Michal Schmidtc590b5e2013-07-01 17:23:30 +02002109 len = min(tmp.len, dump.len);
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002110 if (!len)
2111 return -EFAULT;
2112
Michal Schmidtc590b5e2013-07-01 17:23:30 +02002113 /* Don't ever let the driver think there's more space available
2114 * than it requested with .get_dump_flag().
2115 */
2116 dump.len = len;
2117
2118 /* Always allocate enough space to hold the whole thing so that the
2119 * driver does not need to check the length and bother with partial
2120 * dumping.
2121 */
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002122 data = vzalloc(tmp.len);
2123 if (!data)
2124 return -ENOMEM;
2125 ret = ops->get_dump_data(dev, &dump, data);
2126 if (ret)
2127 goto out;
2128
Michal Schmidtc590b5e2013-07-01 17:23:30 +02002129 /* There are two sane possibilities:
2130 * 1. The driver's .get_dump_data() does not touch dump.len.
2131 * 2. Or it may set dump.len to how much it really writes, which
2132 * should be tmp.len (or len if it can do a partial dump).
2133 * In any case respond to userspace with the actual length of data
2134 * it's receiving.
2135 */
2136 WARN_ON(dump.len != len && dump.len != tmp.len);
2137 dump.len = len;
2138
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002139 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2140 ret = -EFAULT;
2141 goto out;
2142 }
2143 useraddr += offsetof(struct ethtool_dump, data);
2144 if (copy_to_user(useraddr, data, len))
2145 ret = -EFAULT;
2146out:
2147 vfree(data);
2148 return ret;
2149}
2150
Richard Cochranc8f3a8c2012-04-03 22:59:17 +00002151static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2152{
2153 int err = 0;
2154 struct ethtool_ts_info info;
2155 const struct ethtool_ops *ops = dev->ethtool_ops;
2156 struct phy_device *phydev = dev->phydev;
2157
2158 memset(&info, 0, sizeof(info));
2159 info.cmd = ETHTOOL_GET_TS_INFO;
2160
2161 if (phydev && phydev->drv && phydev->drv->ts_info) {
Richard Cochranc8f3a8c2012-04-03 22:59:17 +00002162 err = phydev->drv->ts_info(phydev, &info);
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00002163 } else if (ops->get_ts_info) {
Richard Cochranc8f3a8c2012-04-03 22:59:17 +00002164 err = ops->get_ts_info(dev, &info);
Richard Cochranc8f3a8c2012-04-03 22:59:17 +00002165 } else {
2166 info.so_timestamping =
2167 SOF_TIMESTAMPING_RX_SOFTWARE |
2168 SOF_TIMESTAMPING_SOFTWARE;
2169 info.phc_index = -1;
2170 }
2171
2172 if (err)
2173 return err;
2174
2175 if (copy_to_user(useraddr, &info, sizeof(info)))
2176 err = -EFAULT;
2177
2178 return err;
2179}
2180
Ed Swierk2f438362015-01-02 17:27:56 -08002181static int __ethtool_get_module_info(struct net_device *dev,
2182 struct ethtool_modinfo *modinfo)
2183{
2184 const struct ethtool_ops *ops = dev->ethtool_ops;
2185 struct phy_device *phydev = dev->phydev;
2186
2187 if (phydev && phydev->drv && phydev->drv->module_info)
2188 return phydev->drv->module_info(phydev, modinfo);
2189
2190 if (ops->get_module_info)
2191 return ops->get_module_info(dev, modinfo);
2192
2193 return -EOPNOTSUPP;
2194}
2195
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002196static int ethtool_get_module_info(struct net_device *dev,
2197 void __user *useraddr)
2198{
2199 int ret;
2200 struct ethtool_modinfo modinfo;
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002201
2202 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2203 return -EFAULT;
2204
Ed Swierk2f438362015-01-02 17:27:56 -08002205 ret = __ethtool_get_module_info(dev, &modinfo);
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002206 if (ret)
2207 return ret;
2208
2209 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2210 return -EFAULT;
2211
2212 return 0;
2213}
2214
Ed Swierk2f438362015-01-02 17:27:56 -08002215static int __ethtool_get_module_eeprom(struct net_device *dev,
2216 struct ethtool_eeprom *ee, u8 *data)
2217{
2218 const struct ethtool_ops *ops = dev->ethtool_ops;
2219 struct phy_device *phydev = dev->phydev;
2220
2221 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2222 return phydev->drv->module_eeprom(phydev, ee, data);
2223
2224 if (ops->get_module_eeprom)
2225 return ops->get_module_eeprom(dev, ee, data);
2226
2227 return -EOPNOTSUPP;
2228}
2229
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002230static int ethtool_get_module_eeprom(struct net_device *dev,
2231 void __user *useraddr)
2232{
2233 int ret;
2234 struct ethtool_modinfo modinfo;
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002235
Ed Swierk2f438362015-01-02 17:27:56 -08002236 ret = __ethtool_get_module_info(dev, &modinfo);
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002237 if (ret)
2238 return ret;
2239
Ed Swierk2f438362015-01-02 17:27:56 -08002240 return ethtool_get_any_eeprom(dev, useraddr,
2241 __ethtool_get_module_eeprom,
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002242 modinfo.eeprom_len);
2243}
2244
Govindarajulu Varadarajanf0db9b02014-09-03 03:17:20 +05302245static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2246{
2247 switch (tuna->id) {
2248 case ETHTOOL_RX_COPYBREAK:
Eric Dumazet1255a502014-10-05 12:35:21 +03002249 case ETHTOOL_TX_COPYBREAK:
Govindarajulu Varadarajanf0db9b02014-09-03 03:17:20 +05302250 if (tuna->len != sizeof(u32) ||
2251 tuna->type_id != ETHTOOL_TUNABLE_U32)
2252 return -EINVAL;
2253 break;
2254 default:
2255 return -EINVAL;
2256 }
2257
2258 return 0;
2259}
2260
2261static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2262{
2263 int ret;
2264 struct ethtool_tunable tuna;
2265 const struct ethtool_ops *ops = dev->ethtool_ops;
2266 void *data;
2267
2268 if (!ops->get_tunable)
2269 return -EOPNOTSUPP;
2270 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2271 return -EFAULT;
2272 ret = ethtool_tunable_valid(&tuna);
2273 if (ret)
2274 return ret;
2275 data = kmalloc(tuna.len, GFP_USER);
2276 if (!data)
2277 return -ENOMEM;
2278 ret = ops->get_tunable(dev, &tuna, data);
2279 if (ret)
2280 goto out;
2281 useraddr += sizeof(tuna);
2282 ret = -EFAULT;
2283 if (copy_to_user(useraddr, data, tuna.len))
2284 goto out;
2285 ret = 0;
2286
2287out:
2288 kfree(data);
2289 return ret;
2290}
2291
2292static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2293{
2294 int ret;
2295 struct ethtool_tunable tuna;
2296 const struct ethtool_ops *ops = dev->ethtool_ops;
2297 void *data;
2298
2299 if (!ops->set_tunable)
2300 return -EOPNOTSUPP;
2301 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2302 return -EFAULT;
2303 ret = ethtool_tunable_valid(&tuna);
2304 if (ret)
2305 return ret;
2306 data = kmalloc(tuna.len, GFP_USER);
2307 if (!data)
2308 return -ENOMEM;
2309 useraddr += sizeof(tuna);
2310 ret = -EFAULT;
2311 if (copy_from_user(data, useraddr, tuna.len))
2312 goto out;
2313 ret = ops->set_tunable(dev, &tuna, data);
2314
2315out:
2316 kfree(data);
2317 return ret;
2318}
2319
Kan Liang421797b2016-02-19 09:24:02 -05002320static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2321 void __user *useraddr,
2322 struct ethtool_per_queue_op *per_queue_opt)
2323{
2324 u32 bit;
2325 int ret;
2326 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2327
2328 if (!dev->ethtool_ops->get_per_queue_coalesce)
2329 return -EOPNOTSUPP;
2330
2331 useraddr += sizeof(*per_queue_opt);
2332
2333 bitmap_from_u32array(queue_mask,
2334 MAX_NUM_QUEUE,
2335 per_queue_opt->queue_mask,
2336 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2337
2338 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2339 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2340
2341 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2342 if (ret != 0)
2343 return ret;
2344 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2345 return -EFAULT;
2346 useraddr += sizeof(coalesce);
2347 }
2348
2349 return 0;
2350}
2351
Kan Liangf38d1382016-02-19 09:24:03 -05002352static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2353 void __user *useraddr,
2354 struct ethtool_per_queue_op *per_queue_opt)
2355{
2356 u32 bit;
2357 int i, ret = 0;
2358 int n_queue;
2359 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2360 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2361
2362 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2363 (!dev->ethtool_ops->get_per_queue_coalesce))
2364 return -EOPNOTSUPP;
2365
2366 useraddr += sizeof(*per_queue_opt);
2367
2368 bitmap_from_u32array(queue_mask,
2369 MAX_NUM_QUEUE,
2370 per_queue_opt->queue_mask,
2371 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2372 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2373 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2374 if (!backup)
2375 return -ENOMEM;
2376
2377 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2378 struct ethtool_coalesce coalesce;
2379
2380 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2381 if (ret != 0)
2382 goto roll_back;
2383
2384 tmp++;
2385
2386 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2387 ret = -EFAULT;
2388 goto roll_back;
2389 }
2390
2391 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2392 if (ret != 0)
2393 goto roll_back;
2394
2395 useraddr += sizeof(coalesce);
2396 }
2397
2398roll_back:
2399 if (ret != 0) {
2400 tmp = backup;
2401 for_each_set_bit(i, queue_mask, bit) {
2402 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2403 tmp++;
2404 }
2405 }
2406 kfree(backup);
2407
2408 return ret;
2409}
2410
Kan Liangac2c7ad2016-02-19 09:24:01 -05002411static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2412{
2413 struct ethtool_per_queue_op per_queue_opt;
2414
2415 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2416 return -EFAULT;
2417
2418 switch (per_queue_opt.sub_command) {
Kan Liang421797b2016-02-19 09:24:02 -05002419 case ETHTOOL_GCOALESCE:
2420 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
Kan Liangf38d1382016-02-19 09:24:03 -05002421 case ETHTOOL_SCOALESCE:
2422 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
Kan Liangac2c7ad2016-02-19 09:24:01 -05002423 default:
2424 return -EOPNOTSUPP;
2425 };
2426}
2427
Yan Burman600fed52013-06-03 02:03:34 +00002428/* The main entry point in this file. Called from net/core/dev_ioctl.c */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429
Eric W. Biederman881d9662007-09-17 11:56:21 -07002430int dev_ethtool(struct net *net, struct ifreq *ifr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002431{
Eric W. Biederman881d9662007-09-17 11:56:21 -07002432 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002433 void __user *useraddr = ifr->ifr_data;
Kan Liangac2c7ad2016-02-19 09:24:01 -05002434 u32 ethcmd, sub_cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002435 int rc;
Bjørn Morkb29d3142013-05-01 23:06:42 +00002436 netdev_features_t old_features;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002437
Linus Torvalds1da177e2005-04-16 15:20:36 -07002438 if (!dev || !netif_device_present(dev))
2439 return -ENODEV;
2440
chavey97f8aef2010-04-07 21:54:42 -07002441 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002442 return -EFAULT;
2443
Kan Liangac2c7ad2016-02-19 09:24:01 -05002444 if (ethcmd == ETHTOOL_PERQUEUE) {
2445 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2446 return -EFAULT;
2447 } else {
2448 sub_cmd = ethcmd;
2449 }
Stephen Hemminger75f31232006-09-28 15:13:37 -07002450 /* Allow some commands to be done by anyone */
Kan Liangac2c7ad2016-02-19 09:24:01 -05002451 switch (sub_cmd) {
stephen hemminger0fdc1002010-08-23 10:24:18 +00002452 case ETHTOOL_GSET:
Stephen Hemminger75f31232006-09-28 15:13:37 -07002453 case ETHTOOL_GDRVINFO:
Stephen Hemminger75f31232006-09-28 15:13:37 -07002454 case ETHTOOL_GMSGLVL:
Ben Hutchings2da45db2012-06-12 13:05:41 +00002455 case ETHTOOL_GLINK:
Stephen Hemminger75f31232006-09-28 15:13:37 -07002456 case ETHTOOL_GCOALESCE:
2457 case ETHTOOL_GRINGPARAM:
2458 case ETHTOOL_GPAUSEPARAM:
2459 case ETHTOOL_GRXCSUM:
2460 case ETHTOOL_GTXCSUM:
2461 case ETHTOOL_GSG:
Michał Mirosławf80400a2012-01-22 00:20:40 +00002462 case ETHTOOL_GSSET_INFO:
Stephen Hemminger75f31232006-09-28 15:13:37 -07002463 case ETHTOOL_GSTRINGS:
Ben Hutchings2da45db2012-06-12 13:05:41 +00002464 case ETHTOOL_GSTATS:
Andrew Lunnf3a40942015-12-30 16:28:25 +01002465 case ETHTOOL_GPHYSTATS:
Stephen Hemminger75f31232006-09-28 15:13:37 -07002466 case ETHTOOL_GTSO:
2467 case ETHTOOL_GPERMADDR:
2468 case ETHTOOL_GUFO:
2469 case ETHTOOL_GGSO:
stephen hemminger1cab8192010-02-11 13:48:29 +00002470 case ETHTOOL_GGRO:
Jeff Garzik339bf022007-08-15 16:01:32 -07002471 case ETHTOOL_GFLAGS:
2472 case ETHTOOL_GPFLAGS:
Santwona Behera0853ad62008-07-02 03:47:41 -07002473 case ETHTOOL_GRXFH:
Santwona Behera59089d82009-02-20 00:58:13 -08002474 case ETHTOOL_GRXRINGS:
2475 case ETHTOOL_GRXCLSRLCNT:
2476 case ETHTOOL_GRXCLSRULE:
2477 case ETHTOOL_GRXCLSRLALL:
Ben Hutchings2da45db2012-06-12 13:05:41 +00002478 case ETHTOOL_GRXFHINDIR:
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05302479 case ETHTOOL_GRSSH:
Michał Mirosław5455c692011-02-15 16:59:17 +00002480 case ETHTOOL_GFEATURES:
Ben Hutchings2da45db2012-06-12 13:05:41 +00002481 case ETHTOOL_GCHANNELS:
Richard Cochranc8f3a8c2012-04-03 22:59:17 +00002482 case ETHTOOL_GET_TS_INFO:
Ben Hutchings2da45db2012-06-12 13:05:41 +00002483 case ETHTOOL_GEEE:
Govindarajulu Varadarajanf0db9b02014-09-03 03:17:20 +05302484 case ETHTOOL_GTUNABLE:
Miroslav Lichvar8006f6b2016-11-24 10:55:06 +01002485 case ETHTOOL_GLINKSETTINGS:
Stephen Hemminger75f31232006-09-28 15:13:37 -07002486 break;
2487 default:
Eric W. Biederman5e1fccc2012-11-16 03:03:04 +00002488 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Stephen Hemminger75f31232006-09-28 15:13:37 -07002489 return -EPERM;
2490 }
2491
chavey97f8aef2010-04-07 21:54:42 -07002492 if (dev->ethtool_ops->begin) {
2493 rc = dev->ethtool_ops->begin(dev);
2494 if (rc < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002495 return rc;
chavey97f8aef2010-04-07 21:54:42 -07002496 }
Stephen Hemmingerd8a33ac2005-05-29 14:13:47 -07002497 old_features = dev->features;
2498
Linus Torvalds1da177e2005-04-16 15:20:36 -07002499 switch (ethcmd) {
2500 case ETHTOOL_GSET:
2501 rc = ethtool_get_settings(dev, useraddr);
2502 break;
2503 case ETHTOOL_SSET:
2504 rc = ethtool_set_settings(dev, useraddr);
2505 break;
2506 case ETHTOOL_GDRVINFO:
2507 rc = ethtool_get_drvinfo(dev, useraddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002508 break;
2509 case ETHTOOL_GREGS:
2510 rc = ethtool_get_regs(dev, useraddr);
2511 break;
2512 case ETHTOOL_GWOL:
2513 rc = ethtool_get_wol(dev, useraddr);
2514 break;
2515 case ETHTOOL_SWOL:
2516 rc = ethtool_set_wol(dev, useraddr);
2517 break;
2518 case ETHTOOL_GMSGLVL:
Jeff Garzik13c99b22007-08-15 16:01:56 -07002519 rc = ethtool_get_value(dev, useraddr, ethcmd,
2520 dev->ethtool_ops->get_msglevel);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002521 break;
2522 case ETHTOOL_SMSGLVL:
Jeff Garzik13c99b22007-08-15 16:01:56 -07002523 rc = ethtool_set_value_void(dev, useraddr,
2524 dev->ethtool_ops->set_msglevel);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002525 break;
Yuval Mintz80f12ec2012-06-06 17:13:06 +00002526 case ETHTOOL_GEEE:
2527 rc = ethtool_get_eee(dev, useraddr);
2528 break;
2529 case ETHTOOL_SEEE:
2530 rc = ethtool_set_eee(dev, useraddr);
2531 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532 case ETHTOOL_NWAY_RST:
2533 rc = ethtool_nway_reset(dev);
2534 break;
2535 case ETHTOOL_GLINK:
Ben Hutchingse596e6e2010-12-09 12:08:35 +00002536 rc = ethtool_get_link(dev, useraddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537 break;
2538 case ETHTOOL_GEEPROM:
2539 rc = ethtool_get_eeprom(dev, useraddr);
2540 break;
2541 case ETHTOOL_SEEPROM:
2542 rc = ethtool_set_eeprom(dev, useraddr);
2543 break;
2544 case ETHTOOL_GCOALESCE:
2545 rc = ethtool_get_coalesce(dev, useraddr);
2546 break;
2547 case ETHTOOL_SCOALESCE:
2548 rc = ethtool_set_coalesce(dev, useraddr);
2549 break;
2550 case ETHTOOL_GRINGPARAM:
2551 rc = ethtool_get_ringparam(dev, useraddr);
2552 break;
2553 case ETHTOOL_SRINGPARAM:
2554 rc = ethtool_set_ringparam(dev, useraddr);
2555 break;
2556 case ETHTOOL_GPAUSEPARAM:
2557 rc = ethtool_get_pauseparam(dev, useraddr);
2558 break;
2559 case ETHTOOL_SPAUSEPARAM:
2560 rc = ethtool_set_pauseparam(dev, useraddr);
2561 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002562 case ETHTOOL_TEST:
2563 rc = ethtool_self_test(dev, useraddr);
2564 break;
2565 case ETHTOOL_GSTRINGS:
2566 rc = ethtool_get_strings(dev, useraddr);
2567 break;
2568 case ETHTOOL_PHYS_ID:
2569 rc = ethtool_phys_id(dev, useraddr);
2570 break;
2571 case ETHTOOL_GSTATS:
2572 rc = ethtool_get_stats(dev, useraddr);
2573 break;
Jon Wetzela6f9a702005-08-20 17:15:54 -07002574 case ETHTOOL_GPERMADDR:
2575 rc = ethtool_get_perm_addr(dev, useraddr);
2576 break;
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07002577 case ETHTOOL_GFLAGS:
Jeff Garzik13c99b22007-08-15 16:01:56 -07002578 rc = ethtool_get_value(dev, useraddr, ethcmd,
Michał Mirosławbc5787c62011-11-15 15:29:55 +00002579 __ethtool_get_flags);
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07002580 break;
2581 case ETHTOOL_SFLAGS:
Michał Mirosławda8ac86c2011-02-15 16:59:18 +00002582 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07002583 break;
Jeff Garzik339bf022007-08-15 16:01:32 -07002584 case ETHTOOL_GPFLAGS:
Jeff Garzik13c99b22007-08-15 16:01:56 -07002585 rc = ethtool_get_value(dev, useraddr, ethcmd,
2586 dev->ethtool_ops->get_priv_flags);
Jeff Garzik339bf022007-08-15 16:01:32 -07002587 break;
2588 case ETHTOOL_SPFLAGS:
Jeff Garzik13c99b22007-08-15 16:01:56 -07002589 rc = ethtool_set_value(dev, useraddr,
2590 dev->ethtool_ops->set_priv_flags);
Jeff Garzik339bf022007-08-15 16:01:32 -07002591 break;
Santwona Behera0853ad62008-07-02 03:47:41 -07002592 case ETHTOOL_GRXFH:
Santwona Behera59089d82009-02-20 00:58:13 -08002593 case ETHTOOL_GRXRINGS:
2594 case ETHTOOL_GRXCLSRLCNT:
2595 case ETHTOOL_GRXCLSRULE:
2596 case ETHTOOL_GRXCLSRLALL:
Ben Hutchingsbf988432010-06-28 08:45:58 +00002597 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
Santwona Behera0853ad62008-07-02 03:47:41 -07002598 break;
2599 case ETHTOOL_SRXFH:
Santwona Behera59089d82009-02-20 00:58:13 -08002600 case ETHTOOL_SRXCLSRLDEL:
2601 case ETHTOOL_SRXCLSRLINS:
Ben Hutchingsbf988432010-06-28 08:45:58 +00002602 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
Santwona Behera0853ad62008-07-02 03:47:41 -07002603 break;
Ajit Khaparde05c6a8d2009-09-02 17:02:55 +00002604 case ETHTOOL_FLASHDEV:
2605 rc = ethtool_flash_device(dev, useraddr);
2606 break;
Ben Hutchingsd73d3a82009-10-05 10:59:58 +00002607 case ETHTOOL_RESET:
2608 rc = ethtool_reset(dev, useraddr);
2609 break;
Jeff Garzik723b2f52010-03-03 22:51:50 +00002610 case ETHTOOL_GSSET_INFO:
2611 rc = ethtool_get_sset_info(dev, useraddr);
2612 break;
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00002613 case ETHTOOL_GRXFHINDIR:
2614 rc = ethtool_get_rxfh_indir(dev, useraddr);
2615 break;
2616 case ETHTOOL_SRXFHINDIR:
2617 rc = ethtool_set_rxfh_indir(dev, useraddr);
2618 break;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05302619 case ETHTOOL_GRSSH:
2620 rc = ethtool_get_rxfh(dev, useraddr);
2621 break;
2622 case ETHTOOL_SRSSH:
2623 rc = ethtool_set_rxfh(dev, useraddr);
2624 break;
Michał Mirosław5455c692011-02-15 16:59:17 +00002625 case ETHTOOL_GFEATURES:
2626 rc = ethtool_get_features(dev, useraddr);
2627 break;
2628 case ETHTOOL_SFEATURES:
2629 rc = ethtool_set_features(dev, useraddr);
2630 break;
Michał Mirosław0a417702011-02-15 16:59:17 +00002631 case ETHTOOL_GTXCSUM:
Michał Mirosławe83d3602011-02-15 16:59:18 +00002632 case ETHTOOL_GRXCSUM:
Michał Mirosław0a417702011-02-15 16:59:17 +00002633 case ETHTOOL_GSG:
2634 case ETHTOOL_GTSO:
2635 case ETHTOOL_GUFO:
2636 case ETHTOOL_GGSO:
2637 case ETHTOOL_GGRO:
2638 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2639 break;
2640 case ETHTOOL_STXCSUM:
Michał Mirosławe83d3602011-02-15 16:59:18 +00002641 case ETHTOOL_SRXCSUM:
Michał Mirosław0a417702011-02-15 16:59:17 +00002642 case ETHTOOL_SSG:
2643 case ETHTOOL_STSO:
2644 case ETHTOOL_SUFO:
2645 case ETHTOOL_SGSO:
2646 case ETHTOOL_SGRO:
2647 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2648 break;
amit salecha8b5933c2011-04-07 01:58:42 +00002649 case ETHTOOL_GCHANNELS:
2650 rc = ethtool_get_channels(dev, useraddr);
2651 break;
2652 case ETHTOOL_SCHANNELS:
2653 rc = ethtool_set_channels(dev, useraddr);
2654 break;
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002655 case ETHTOOL_SET_DUMP:
2656 rc = ethtool_set_dump(dev, useraddr);
2657 break;
2658 case ETHTOOL_GET_DUMP_FLAG:
2659 rc = ethtool_get_dump_flag(dev, useraddr);
2660 break;
2661 case ETHTOOL_GET_DUMP_DATA:
2662 rc = ethtool_get_dump_data(dev, useraddr);
2663 break;
Richard Cochranc8f3a8c2012-04-03 22:59:17 +00002664 case ETHTOOL_GET_TS_INFO:
2665 rc = ethtool_get_ts_info(dev, useraddr);
2666 break;
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002667 case ETHTOOL_GMODULEINFO:
2668 rc = ethtool_get_module_info(dev, useraddr);
2669 break;
2670 case ETHTOOL_GMODULEEEPROM:
2671 rc = ethtool_get_module_eeprom(dev, useraddr);
2672 break;
Govindarajulu Varadarajanf0db9b02014-09-03 03:17:20 +05302673 case ETHTOOL_GTUNABLE:
2674 rc = ethtool_get_tunable(dev, useraddr);
2675 break;
2676 case ETHTOOL_STUNABLE:
2677 rc = ethtool_set_tunable(dev, useraddr);
2678 break;
Andrew Lunnf3a40942015-12-30 16:28:25 +01002679 case ETHTOOL_GPHYSTATS:
2680 rc = ethtool_get_phy_stats(dev, useraddr);
2681 break;
Kan Liangac2c7ad2016-02-19 09:24:01 -05002682 case ETHTOOL_PERQUEUE:
2683 rc = ethtool_set_per_queue(dev, useraddr);
2684 break;
David Decotigny3f1ac7a2016-02-24 10:57:59 -08002685 case ETHTOOL_GLINKSETTINGS:
2686 rc = ethtool_get_link_ksettings(dev, useraddr);
2687 break;
2688 case ETHTOOL_SLINKSETTINGS:
2689 rc = ethtool_set_link_ksettings(dev, useraddr);
2690 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002691 default:
Matthew Wilcox61a44b92007-07-31 14:00:02 -07002692 rc = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002693 }
YOSHIFUJI Hideaki4ec93ed2007-02-09 23:24:36 +09002694
Stephen Hemmingere71a4782007-04-10 20:10:33 -07002695 if (dev->ethtool_ops->complete)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002696 dev->ethtool_ops->complete(dev);
Stephen Hemmingerd8a33ac2005-05-29 14:13:47 -07002697
2698 if (old_features != dev->features)
2699 netdev_features_change(dev);
2700
Linus Torvalds1da177e2005-04-16 15:20:36 -07002701 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002702}