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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",
Michał Mirosław9d921542011-11-15 15:29:55 +000092
93 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
Tom Herbert53692b12015-12-14 11:19:41 -080094 [NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
Michał Mirosław9d921542011-11-15 15:29:55 +000095 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
96 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
97 [NETIF_F_RXHASH_BIT] = "rx-hashing",
98 [NETIF_F_RXCSUM_BIT] = "rx-checksum",
99 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy",
100 [NETIF_F_LOOPBACK_BIT] = "loopback",
Ben Greear36eabda32012-02-11 15:39:14 +0000101 [NETIF_F_RXFCS_BIT] = "rx-fcs",
Ben Greear5e0c03c2012-02-11 15:39:45 +0000102 [NETIF_F_RXALL_BIT] = "rx-all",
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800103 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
Jiri Pirkod0290212014-04-02 23:09:31 +0200104 [NETIF_F_BUSY_POLL_BIT] = "busy-poll",
John Fastabend1c78c642016-02-16 21:17:37 -0800105 [NETIF_F_HW_TC_BIT] = "hw-tc-offload",
Michał Mirosław9d921542011-11-15 15:29:55 +0000106};
107
Eyal Perry892311f2014-12-02 18:12:10 +0200108static const char
109rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = {
110 [ETH_RSS_HASH_TOP_BIT] = "toeplitz",
111 [ETH_RSS_HASH_XOR_BIT] = "xor",
112};
113
Hadar Hen Ziona4244b02015-06-11 10:28:16 +0300114static const char
115tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
116 [ETHTOOL_ID_UNSPEC] = "Unspec",
117 [ETHTOOL_RX_COPYBREAK] = "rx-copybreak",
118 [ETHTOOL_TX_COPYBREAK] = "tx-copybreak",
119};
120
Michał Mirosław5455c692011-02-15 16:59:17 +0000121static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
122{
123 struct ethtool_gfeatures cmd = {
124 .cmd = ETHTOOL_GFEATURES,
125 .size = ETHTOOL_DEV_FEATURE_WORDS,
126 };
Michał Mirosław475414f2011-11-15 15:29:55 +0000127 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
Michał Mirosław5455c692011-02-15 16:59:17 +0000128 u32 __user *sizeaddr;
129 u32 copy_size;
Michał Mirosław475414f2011-11-15 15:29:55 +0000130 int i;
131
132 /* in case feature bits run out again */
Michał Mirosław09da71b2011-11-16 14:32:03 +0000133 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
Michał Mirosław475414f2011-11-15 15:29:55 +0000134
135 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
Michał Mirosław09da71b2011-11-16 14:32:03 +0000136 features[i].available = (u32)(dev->hw_features >> (32 * i));
137 features[i].requested = (u32)(dev->wanted_features >> (32 * i));
138 features[i].active = (u32)(dev->features >> (32 * i));
139 features[i].never_changed =
140 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
Michał Mirosław475414f2011-11-15 15:29:55 +0000141 }
Michał Mirosław5455c692011-02-15 16:59:17 +0000142
143 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
144 if (get_user(copy_size, sizeaddr))
145 return -EFAULT;
146
147 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
148 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
149
150 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
151 return -EFAULT;
152 useraddr += sizeof(cmd);
153 if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
154 return -EFAULT;
155
156 return 0;
157}
158
159static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
160{
161 struct ethtool_sfeatures cmd;
162 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
Michał Mirosław475414f2011-11-15 15:29:55 +0000163 netdev_features_t wanted = 0, valid = 0;
164 int i, ret = 0;
Michał Mirosław5455c692011-02-15 16:59:17 +0000165
166 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
167 return -EFAULT;
168 useraddr += sizeof(cmd);
169
170 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
171 return -EINVAL;
172
173 if (copy_from_user(features, useraddr, sizeof(features)))
174 return -EFAULT;
175
Michał Mirosław475414f2011-11-15 15:29:55 +0000176 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
Michał Mirosław09da71b2011-11-16 14:32:03 +0000177 valid |= (netdev_features_t)features[i].valid << (32 * i);
178 wanted |= (netdev_features_t)features[i].requested << (32 * i);
Michał Mirosław475414f2011-11-15 15:29:55 +0000179 }
180
181 if (valid & ~NETIF_F_ETHTOOL_BITS)
Michał Mirosław5455c692011-02-15 16:59:17 +0000182 return -EINVAL;
183
Michał Mirosław475414f2011-11-15 15:29:55 +0000184 if (valid & ~dev->hw_features) {
185 valid &= dev->hw_features;
Michał Mirosław5455c692011-02-15 16:59:17 +0000186 ret |= ETHTOOL_F_UNSUPPORTED;
187 }
188
Michał Mirosław475414f2011-11-15 15:29:55 +0000189 dev->wanted_features &= ~valid;
190 dev->wanted_features |= wanted & valid;
Michał Mirosław6cb6a272011-04-02 22:48:47 -0700191 __netdev_update_features(dev);
Michał Mirosław5455c692011-02-15 16:59:17 +0000192
Michał Mirosław475414f2011-11-15 15:29:55 +0000193 if ((dev->wanted_features ^ dev->features) & valid)
Michał Mirosław5455c692011-02-15 16:59:17 +0000194 ret |= ETHTOOL_F_WISH;
195
196 return ret;
197}
198
Andrew Lunnf3a40942015-12-30 16:28:25 +0100199static int phy_get_sset_count(struct phy_device *phydev)
200{
201 int ret;
202
203 if (phydev->drv->get_sset_count &&
204 phydev->drv->get_strings &&
205 phydev->drv->get_stats) {
206 mutex_lock(&phydev->lock);
207 ret = phydev->drv->get_sset_count(phydev);
208 mutex_unlock(&phydev->lock);
209
210 return ret;
211 }
212
213 return -EOPNOTSUPP;
214}
215
Michał Mirosław340ae162011-02-15 16:59:16 +0000216static int __ethtool_get_sset_count(struct net_device *dev, int sset)
217{
218 const struct ethtool_ops *ops = dev->ethtool_ops;
219
Michał Mirosław5455c692011-02-15 16:59:17 +0000220 if (sset == ETH_SS_FEATURES)
221 return ARRAY_SIZE(netdev_features_strings);
222
Eyal Perry892311f2014-12-02 18:12:10 +0200223 if (sset == ETH_SS_RSS_HASH_FUNCS)
224 return ARRAY_SIZE(rss_hash_func_strings);
225
Hadar Hen Ziona4244b02015-06-11 10:28:16 +0300226 if (sset == ETH_SS_TUNABLES)
227 return ARRAY_SIZE(tunable_strings);
228
Andrew Lunnf3a40942015-12-30 16:28:25 +0100229 if (sset == ETH_SS_PHY_STATS) {
230 if (dev->phydev)
231 return phy_get_sset_count(dev->phydev);
232 else
233 return -EOPNOTSUPP;
234 }
235
Jiri Pirkoc03a14e2013-01-07 09:02:08 +0000236 if (ops->get_sset_count && ops->get_strings)
Michał Mirosław340ae162011-02-15 16:59:16 +0000237 return ops->get_sset_count(dev, sset);
238 else
239 return -EOPNOTSUPP;
240}
241
242static void __ethtool_get_strings(struct net_device *dev,
243 u32 stringset, u8 *data)
244{
245 const struct ethtool_ops *ops = dev->ethtool_ops;
246
Michał Mirosław5455c692011-02-15 16:59:17 +0000247 if (stringset == ETH_SS_FEATURES)
248 memcpy(data, netdev_features_strings,
249 sizeof(netdev_features_strings));
Eyal Perry892311f2014-12-02 18:12:10 +0200250 else if (stringset == ETH_SS_RSS_HASH_FUNCS)
251 memcpy(data, rss_hash_func_strings,
252 sizeof(rss_hash_func_strings));
Hadar Hen Ziona4244b02015-06-11 10:28:16 +0300253 else if (stringset == ETH_SS_TUNABLES)
254 memcpy(data, tunable_strings, sizeof(tunable_strings));
Andrew Lunnf3a40942015-12-30 16:28:25 +0100255 else if (stringset == ETH_SS_PHY_STATS) {
256 struct phy_device *phydev = dev->phydev;
257
258 if (phydev) {
259 mutex_lock(&phydev->lock);
260 phydev->drv->get_strings(phydev, data);
261 mutex_unlock(&phydev->lock);
262 } else {
263 return;
264 }
265 } else
Michał Mirosław5455c692011-02-15 16:59:17 +0000266 /* ops->get_strings is valid because checked earlier */
267 ops->get_strings(dev, stringset, data);
Michał Mirosław340ae162011-02-15 16:59:16 +0000268}
269
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000270static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd)
Michał Mirosław0a417702011-02-15 16:59:17 +0000271{
272 /* feature masks of legacy discrete ethtool ops */
273
274 switch (eth_cmd) {
275 case ETHTOOL_GTXCSUM:
276 case ETHTOOL_STXCSUM:
Tom Herberta1882222015-12-14 11:19:43 -0800277 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC;
Michał Mirosławe83d3602011-02-15 16:59:18 +0000278 case ETHTOOL_GRXCSUM:
279 case ETHTOOL_SRXCSUM:
280 return NETIF_F_RXCSUM;
Michał Mirosław0a417702011-02-15 16:59:17 +0000281 case ETHTOOL_GSG:
282 case ETHTOOL_SSG:
283 return NETIF_F_SG;
284 case ETHTOOL_GTSO:
285 case ETHTOOL_STSO:
286 return NETIF_F_ALL_TSO;
287 case ETHTOOL_GUFO:
288 case ETHTOOL_SUFO:
289 return NETIF_F_UFO;
290 case ETHTOOL_GGSO:
291 case ETHTOOL_SGSO:
292 return NETIF_F_GSO;
293 case ETHTOOL_GGRO:
294 case ETHTOOL_SGRO:
295 return NETIF_F_GRO;
296 default:
297 BUG();
298 }
299}
300
Michał Mirosław0a417702011-02-15 16:59:17 +0000301static int ethtool_get_one_feature(struct net_device *dev,
302 char __user *useraddr, u32 ethcmd)
303{
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000304 netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
Michał Mirosław0a417702011-02-15 16:59:17 +0000305 struct ethtool_value edata = {
306 .cmd = ethcmd,
Michał Mirosław86794882011-02-15 16:59:17 +0000307 .data = !!(dev->features & mask),
Michał Mirosław0a417702011-02-15 16:59:17 +0000308 };
Michał Mirosław0a417702011-02-15 16:59:17 +0000309
Michał Mirosław0a417702011-02-15 16:59:17 +0000310 if (copy_to_user(useraddr, &edata, sizeof(edata)))
311 return -EFAULT;
312 return 0;
313}
314
Michał Mirosław0a417702011-02-15 16:59:17 +0000315static int ethtool_set_one_feature(struct net_device *dev,
316 void __user *useraddr, u32 ethcmd)
317{
318 struct ethtool_value edata;
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000319 netdev_features_t mask;
Michał Mirosław0a417702011-02-15 16:59:17 +0000320
321 if (copy_from_user(&edata, useraddr, sizeof(edata)))
322 return -EFAULT;
323
Michał Mirosław86794882011-02-15 16:59:17 +0000324 mask = ethtool_get_feature_mask(ethcmd);
325 mask &= dev->hw_features;
Michał Mirosławbc5787c62011-11-15 15:29:55 +0000326 if (!mask)
Michał Mirosław0a417702011-02-15 16:59:17 +0000327 return -EOPNOTSUPP;
Michał Mirosławbc5787c62011-11-15 15:29:55 +0000328
329 if (edata.data)
330 dev->wanted_features |= mask;
331 else
332 dev->wanted_features &= ~mask;
333
334 __netdev_update_features(dev);
335
336 return 0;
Michał Mirosław0a417702011-02-15 16:59:17 +0000337}
338
Michał Mirosław02b3a552011-11-15 15:29:55 +0000339#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \
340 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH)
Patrick McHardyf6469682013-04-19 02:04:27 +0000341#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \
342 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \
343 NETIF_F_RXHASH)
Michał Mirosławbc5787c62011-11-15 15:29:55 +0000344
345static u32 __ethtool_get_flags(struct net_device *dev)
346{
Michał Mirosław02b3a552011-11-15 15:29:55 +0000347 u32 flags = 0;
348
Dragos Foianu8a731252013-07-13 14:43:00 +0100349 if (dev->features & NETIF_F_LRO)
350 flags |= ETH_FLAG_LRO;
351 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
352 flags |= ETH_FLAG_RXVLAN;
353 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
354 flags |= ETH_FLAG_TXVLAN;
355 if (dev->features & NETIF_F_NTUPLE)
356 flags |= ETH_FLAG_NTUPLE;
357 if (dev->features & NETIF_F_RXHASH)
358 flags |= ETH_FLAG_RXHASH;
Michał Mirosław02b3a552011-11-15 15:29:55 +0000359
360 return flags;
Michał Mirosławbc5787c62011-11-15 15:29:55 +0000361}
362
363static int __ethtool_set_flags(struct net_device *dev, u32 data)
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000364{
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000365 netdev_features_t features = 0, changed;
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000366
Michał Mirosław02b3a552011-11-15 15:29:55 +0000367 if (data & ~ETH_ALL_FLAGS)
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000368 return -EINVAL;
369
Dragos Foianu8a731252013-07-13 14:43:00 +0100370 if (data & ETH_FLAG_LRO)
371 features |= NETIF_F_LRO;
372 if (data & ETH_FLAG_RXVLAN)
373 features |= NETIF_F_HW_VLAN_CTAG_RX;
374 if (data & ETH_FLAG_TXVLAN)
375 features |= NETIF_F_HW_VLAN_CTAG_TX;
376 if (data & ETH_FLAG_NTUPLE)
377 features |= NETIF_F_NTUPLE;
378 if (data & ETH_FLAG_RXHASH)
379 features |= NETIF_F_RXHASH;
Michał Mirosław02b3a552011-11-15 15:29:55 +0000380
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000381 /* allow changing only bits set in hw_features */
Michał Mirosław02b3a552011-11-15 15:29:55 +0000382 changed = (features ^ dev->features) & ETH_ALL_FEATURES;
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000383 if (changed & ~dev->hw_features)
384 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
385
386 dev->wanted_features =
Michał Mirosław02b3a552011-11-15 15:29:55 +0000387 (dev->wanted_features & ~changed) | (features & changed);
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000388
Michał Mirosław6cb6a272011-04-02 22:48:47 -0700389 __netdev_update_features(dev);
Michał Mirosławda8ac86c2011-02-15 16:59:18 +0000390
391 return 0;
392}
393
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200394void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst,
395 u32 legacy_u32)
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800396{
397 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
398 dst[0] = legacy_u32;
399}
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200400EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode);
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800401
402/* return false if src had higher bits set. lower bits always updated. */
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200403bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32,
404 const unsigned long *src)
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800405{
406 bool retval = true;
407
408 /* TODO: following test will soon always be true */
409 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) {
410 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext);
411
412 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
413 bitmap_fill(ext, 32);
414 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS);
415 if (bitmap_intersects(ext, src,
416 __ETHTOOL_LINK_MODE_MASK_NBITS)) {
417 /* src mask goes beyond bit 31 */
418 retval = false;
419 }
420 }
421 *legacy_u32 = src[0];
422 return retval;
423}
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200424EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32);
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800425
426/* return false if legacy contained non-0 deprecated fields
427 * transceiver/maxtxpkt/maxrxpkt. rest of ksettings always updated
428 */
429static bool
430convert_legacy_settings_to_link_ksettings(
431 struct ethtool_link_ksettings *link_ksettings,
432 const struct ethtool_cmd *legacy_settings)
433{
434 bool retval = true;
435
436 memset(link_ksettings, 0, sizeof(*link_ksettings));
437
438 /* This is used to tell users that driver is still using these
439 * deprecated legacy fields, and they should not use
440 * %ETHTOOL_GLINKSETTINGS/%ETHTOOL_SLINKSETTINGS
441 */
442 if (legacy_settings->transceiver ||
443 legacy_settings->maxtxpkt ||
444 legacy_settings->maxrxpkt)
445 retval = false;
446
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200447 ethtool_convert_legacy_u32_to_link_mode(
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800448 link_ksettings->link_modes.supported,
449 legacy_settings->supported);
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200450 ethtool_convert_legacy_u32_to_link_mode(
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800451 link_ksettings->link_modes.advertising,
452 legacy_settings->advertising);
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200453 ethtool_convert_legacy_u32_to_link_mode(
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800454 link_ksettings->link_modes.lp_advertising,
455 legacy_settings->lp_advertising);
456 link_ksettings->base.speed
457 = ethtool_cmd_speed(legacy_settings);
458 link_ksettings->base.duplex
459 = legacy_settings->duplex;
460 link_ksettings->base.port
461 = legacy_settings->port;
462 link_ksettings->base.phy_address
463 = legacy_settings->phy_address;
464 link_ksettings->base.autoneg
465 = legacy_settings->autoneg;
466 link_ksettings->base.mdio_support
467 = legacy_settings->mdio_support;
468 link_ksettings->base.eth_tp_mdix
469 = legacy_settings->eth_tp_mdix;
470 link_ksettings->base.eth_tp_mdix_ctrl
471 = legacy_settings->eth_tp_mdix_ctrl;
472 return retval;
473}
474
475/* return false if ksettings link modes had higher bits
476 * set. legacy_settings always updated (best effort)
477 */
478static bool
479convert_link_ksettings_to_legacy_settings(
480 struct ethtool_cmd *legacy_settings,
481 const struct ethtool_link_ksettings *link_ksettings)
482{
483 bool retval = true;
484
485 memset(legacy_settings, 0, sizeof(*legacy_settings));
486 /* this also clears the deprecated fields in legacy structure:
487 * __u8 transceiver;
488 * __u32 maxtxpkt;
489 * __u32 maxrxpkt;
490 */
491
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200492 retval &= ethtool_convert_link_mode_to_legacy_u32(
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800493 &legacy_settings->supported,
494 link_ksettings->link_modes.supported);
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200495 retval &= ethtool_convert_link_mode_to_legacy_u32(
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800496 &legacy_settings->advertising,
497 link_ksettings->link_modes.advertising);
Philippe Reynes6d62b4d2016-04-15 00:34:59 +0200498 retval &= ethtool_convert_link_mode_to_legacy_u32(
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800499 &legacy_settings->lp_advertising,
500 link_ksettings->link_modes.lp_advertising);
501 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed);
502 legacy_settings->duplex
503 = link_ksettings->base.duplex;
504 legacy_settings->port
505 = link_ksettings->base.port;
506 legacy_settings->phy_address
507 = link_ksettings->base.phy_address;
508 legacy_settings->autoneg
509 = link_ksettings->base.autoneg;
510 legacy_settings->mdio_support
511 = link_ksettings->base.mdio_support;
512 legacy_settings->eth_tp_mdix
513 = link_ksettings->base.eth_tp_mdix;
514 legacy_settings->eth_tp_mdix_ctrl
515 = link_ksettings->base.eth_tp_mdix_ctrl;
516 return retval;
517}
518
519/* number of 32-bit words to store the user's link mode bitmaps */
520#define __ETHTOOL_LINK_MODE_MASK_NU32 \
521 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32)
522
523/* layout of the struct passed from/to userland */
524struct ethtool_link_usettings {
525 struct ethtool_link_settings base;
526 struct {
527 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32];
528 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
529 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32];
530 } link_modes;
531};
532
533/* Internal kernel helper to query a device ethtool_link_settings.
534 *
535 * Backward compatibility note: for compatibility with legacy drivers
536 * that implement only the ethtool_cmd API, this has to work with both
537 * drivers implementing get_link_ksettings API and drivers
538 * implementing get_settings API. When drivers implement get_settings
539 * and report ethtool_cmd deprecated fields
540 * (transceiver/maxrxpkt/maxtxpkt), these fields are silently ignored
541 * because the resulting struct ethtool_link_settings does not report them.
542 */
543int __ethtool_get_link_ksettings(struct net_device *dev,
544 struct ethtool_link_ksettings *link_ksettings)
545{
546 int err;
547 struct ethtool_cmd cmd;
548
549 ASSERT_RTNL();
550
551 if (dev->ethtool_ops->get_link_ksettings) {
552 memset(link_ksettings, 0, sizeof(*link_ksettings));
553 return dev->ethtool_ops->get_link_ksettings(dev,
554 link_ksettings);
555 }
556
557 /* driver doesn't support %ethtool_link_ksettings API. revert to
558 * legacy %ethtool_cmd API, unless it's not supported either.
559 * TODO: remove when ethtool_ops::get_settings disappears internally
560 */
David Decotigny3237fc62016-02-24 10:58:11 -0800561 if (!dev->ethtool_ops->get_settings)
562 return -EOPNOTSUPP;
563
564 memset(&cmd, 0, sizeof(cmd));
565 cmd.cmd = ETHTOOL_GSET;
566 err = dev->ethtool_ops->get_settings(dev, &cmd);
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800567 if (err < 0)
568 return err;
569
570 /* we ignore deprecated fields transceiver/maxrxpkt/maxtxpkt
571 */
572 convert_legacy_settings_to_link_ksettings(link_ksettings, &cmd);
573 return err;
574}
575EXPORT_SYMBOL(__ethtool_get_link_ksettings);
576
577/* convert ethtool_link_usettings in user space to a kernel internal
578 * ethtool_link_ksettings. return 0 on success, errno on error.
579 */
580static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to,
581 const void __user *from)
582{
583 struct ethtool_link_usettings link_usettings;
584
585 if (copy_from_user(&link_usettings, from, sizeof(link_usettings)))
586 return -EFAULT;
587
588 memcpy(&to->base, &link_usettings.base, sizeof(to->base));
589 bitmap_from_u32array(to->link_modes.supported,
590 __ETHTOOL_LINK_MODE_MASK_NBITS,
591 link_usettings.link_modes.supported,
592 __ETHTOOL_LINK_MODE_MASK_NU32);
593 bitmap_from_u32array(to->link_modes.advertising,
594 __ETHTOOL_LINK_MODE_MASK_NBITS,
595 link_usettings.link_modes.advertising,
596 __ETHTOOL_LINK_MODE_MASK_NU32);
597 bitmap_from_u32array(to->link_modes.lp_advertising,
598 __ETHTOOL_LINK_MODE_MASK_NBITS,
599 link_usettings.link_modes.lp_advertising,
600 __ETHTOOL_LINK_MODE_MASK_NU32);
601
602 return 0;
603}
604
605/* convert a kernel internal ethtool_link_ksettings to
606 * ethtool_link_usettings in user space. return 0 on success, errno on
607 * error.
608 */
609static int
610store_link_ksettings_for_user(void __user *to,
611 const struct ethtool_link_ksettings *from)
612{
613 struct ethtool_link_usettings link_usettings;
614
615 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings));
616 bitmap_to_u32array(link_usettings.link_modes.supported,
617 __ETHTOOL_LINK_MODE_MASK_NU32,
618 from->link_modes.supported,
619 __ETHTOOL_LINK_MODE_MASK_NBITS);
620 bitmap_to_u32array(link_usettings.link_modes.advertising,
621 __ETHTOOL_LINK_MODE_MASK_NU32,
622 from->link_modes.advertising,
623 __ETHTOOL_LINK_MODE_MASK_NBITS);
624 bitmap_to_u32array(link_usettings.link_modes.lp_advertising,
625 __ETHTOOL_LINK_MODE_MASK_NU32,
626 from->link_modes.lp_advertising,
627 __ETHTOOL_LINK_MODE_MASK_NBITS);
628
629 if (copy_to_user(to, &link_usettings, sizeof(link_usettings)))
630 return -EFAULT;
631
632 return 0;
633}
634
635/* Query device for its ethtool_link_settings.
636 *
637 * Backward compatibility note: this function must fail when driver
638 * does not implement ethtool::get_link_ksettings, even if legacy
639 * ethtool_ops::get_settings is implemented. This tells new versions
640 * of ethtool that they should use the legacy API %ETHTOOL_GSET for
641 * this driver, so that they can correctly access the ethtool_cmd
642 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
643 * implements ethtool_ops::get_settings anymore.
644 */
645static int ethtool_get_link_ksettings(struct net_device *dev,
646 void __user *useraddr)
647{
648 int err = 0;
649 struct ethtool_link_ksettings link_ksettings;
650
651 ASSERT_RTNL();
652
653 if (!dev->ethtool_ops->get_link_ksettings)
654 return -EOPNOTSUPP;
655
656 /* handle bitmap nbits handshake */
657 if (copy_from_user(&link_ksettings.base, useraddr,
658 sizeof(link_ksettings.base)))
659 return -EFAULT;
660
661 if (__ETHTOOL_LINK_MODE_MASK_NU32
662 != link_ksettings.base.link_mode_masks_nwords) {
663 /* wrong link mode nbits requested */
664 memset(&link_ksettings, 0, sizeof(link_ksettings));
Ben Hutchings793cf872016-03-14 01:05:38 +0000665 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800666 /* send back number of words required as negative val */
667 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX,
668 "need too many bits for link modes!");
669 link_ksettings.base.link_mode_masks_nwords
670 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32);
671
672 /* copy the base fields back to user, not the link
673 * mode bitmaps
674 */
675 if (copy_to_user(useraddr, &link_ksettings.base,
676 sizeof(link_ksettings.base)))
677 return -EFAULT;
678
679 return 0;
680 }
681
682 /* handshake successful: user/kernel agree on
683 * link_mode_masks_nwords
684 */
685
686 memset(&link_ksettings, 0, sizeof(link_ksettings));
687 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings);
688 if (err < 0)
689 return err;
690
691 /* make sure we tell the right values to user */
692 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS;
693 link_ksettings.base.link_mode_masks_nwords
694 = __ETHTOOL_LINK_MODE_MASK_NU32;
695
696 return store_link_ksettings_for_user(useraddr, &link_ksettings);
697}
698
699/* Update device ethtool_link_settings.
700 *
701 * Backward compatibility note: this function must fail when driver
702 * does not implement ethtool::set_link_ksettings, even if legacy
703 * ethtool_ops::set_settings is implemented. This tells new versions
704 * of ethtool that they should use the legacy API %ETHTOOL_SSET for
705 * this driver, so that they can correctly update the ethtool_cmd
706 * deprecated fields (transceiver/maxrxpkt/maxtxpkt), until no driver
707 * implements ethtool_ops::get_settings anymore.
708 */
709static int ethtool_set_link_ksettings(struct net_device *dev,
710 void __user *useraddr)
711{
712 int err;
713 struct ethtool_link_ksettings link_ksettings;
714
715 ASSERT_RTNL();
716
717 if (!dev->ethtool_ops->set_link_ksettings)
718 return -EOPNOTSUPP;
719
720 /* make sure nbits field has expected value */
721 if (copy_from_user(&link_ksettings.base, useraddr,
722 sizeof(link_ksettings.base)))
723 return -EFAULT;
724
725 if (__ETHTOOL_LINK_MODE_MASK_NU32
726 != link_ksettings.base.link_mode_masks_nwords)
727 return -EINVAL;
728
729 /* copy the whole structure, now that we know it has expected
730 * format
731 */
732 err = load_link_ksettings_from_user(&link_ksettings, useraddr);
733 if (err)
734 return err;
735
736 /* re-check nwords field, just in case */
737 if (__ETHTOOL_LINK_MODE_MASK_NU32
738 != link_ksettings.base.link_mode_masks_nwords)
739 return -EINVAL;
740
741 return dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings);
742}
743
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800744static void
745warn_incomplete_ethtool_legacy_settings_conversion(const char *details)
746{
747 char name[sizeof(current->comm)];
748
749 pr_info_once("warning: `%s' uses legacy ethtool link settings API, %s\n",
750 get_task_comm(name, current), details);
751}
752
753/* Query device for its ethtool_cmd settings.
754 *
755 * Backward compatibility note: for compatibility with legacy ethtool,
756 * this has to work with both drivers implementing get_link_ksettings
757 * API and drivers implementing get_settings API. When drivers
758 * implement get_link_ksettings and report higher link mode bits, a
759 * kernel warning is logged once (with name of 1st driver/device) to
760 * recommend user to upgrade ethtool, but the command is successful
761 * (only the lower link mode bits reported back to user).
762 */
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000763static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
764{
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000765 struct ethtool_cmd cmd;
766
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800767 ASSERT_RTNL();
768
769 if (dev->ethtool_ops->get_link_ksettings) {
770 /* First, use link_ksettings API if it is supported */
771 int err;
772 struct ethtool_link_ksettings link_ksettings;
773
774 memset(&link_ksettings, 0, sizeof(link_ksettings));
775 err = dev->ethtool_ops->get_link_ksettings(dev,
776 &link_ksettings);
777 if (err < 0)
778 return err;
779 if (!convert_link_ksettings_to_legacy_settings(&cmd,
780 &link_ksettings))
781 warn_incomplete_ethtool_legacy_settings_conversion(
782 "link modes are only partially reported");
783
784 /* send a sensible cmd tag back to user */
785 cmd.cmd = ETHTOOL_GSET;
786 } else {
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800787 /* driver doesn't support %ethtool_link_ksettings
788 * API. revert to legacy %ethtool_cmd API, unless it's
789 * not supported either.
790 */
David Decotigny3237fc62016-02-24 10:58:11 -0800791 int err;
792
793 if (!dev->ethtool_ops->get_settings)
794 return -EOPNOTSUPP;
795
796 memset(&cmd, 0, sizeof(cmd));
797 cmd.cmd = ETHTOOL_GSET;
798 err = dev->ethtool_ops->get_settings(dev, &cmd);
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800799 if (err < 0)
800 return err;
801 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
803 if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
804 return -EFAULT;
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800805
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 return 0;
807}
808
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800809/* Update device link settings with given ethtool_cmd.
810 *
811 * Backward compatibility note: for compatibility with legacy ethtool,
812 * this has to work with both drivers implementing set_link_ksettings
813 * API and drivers implementing set_settings API. When drivers
814 * implement set_link_ksettings and user's request updates deprecated
815 * ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel
816 * warning is logged once (with name of 1st driver/device) to
817 * recommend user to upgrade ethtool, and the request is rejected.
818 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
820{
821 struct ethtool_cmd cmd;
822
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800823 ASSERT_RTNL();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824
825 if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
826 return -EFAULT;
827
David Decotigny3f1ac7a2016-02-24 10:57:59 -0800828 /* first, try new %ethtool_link_ksettings API. */
829 if (dev->ethtool_ops->set_link_ksettings) {
830 struct ethtool_link_ksettings link_ksettings;
831
832 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings,
833 &cmd))
834 return -EINVAL;
835
836 link_ksettings.base.cmd = ETHTOOL_SLINKSETTINGS;
837 link_ksettings.base.link_mode_masks_nwords
838 = __ETHTOOL_LINK_MODE_MASK_NU32;
839 return dev->ethtool_ops->set_link_ksettings(dev,
840 &link_ksettings);
841 }
842
843 /* legacy %ethtool_cmd API */
844
845 /* TODO: return -EOPNOTSUPP when ethtool_ops::get_settings
846 * disappears internally
847 */
848
849 if (!dev->ethtool_ops->set_settings)
850 return -EOPNOTSUPP;
851
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 return dev->ethtool_ops->set_settings(dev, &cmd);
853}
854
chavey97f8aef2010-04-07 21:54:42 -0700855static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
856 void __user *useraddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857{
858 struct ethtool_drvinfo info;
Stephen Hemminger76fd8592006-09-08 11:16:13 -0700859 const struct ethtool_ops *ops = dev->ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 memset(&info, 0, sizeof(info));
862 info.cmd = ETHTOOL_GDRVINFO;
Jiri Pirkoc03a14e2013-01-07 09:02:08 +0000863 if (ops->get_drvinfo) {
Ben Hutchings01414802010-08-17 02:31:15 -0700864 ops->get_drvinfo(dev, &info);
865 } else if (dev->dev.parent && dev->dev.parent->driver) {
866 strlcpy(info.bus_info, dev_name(dev->dev.parent),
867 sizeof(info.bus_info));
868 strlcpy(info.driver, dev->dev.parent->driver->name,
869 sizeof(info.driver));
870 } else {
871 return -EOPNOTSUPP;
872 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873
Jeff Garzik723b2f52010-03-03 22:51:50 +0000874 /*
875 * this method of obtaining string set info is deprecated;
Jeff Garzikd17792e2010-03-04 08:21:53 +0000876 * Use ETHTOOL_GSSET_INFO instead.
Jeff Garzik723b2f52010-03-03 22:51:50 +0000877 */
Jiri Pirkoc03a14e2013-01-07 09:02:08 +0000878 if (ops->get_sset_count) {
Jeff Garzikff03d492007-08-15 16:01:08 -0700879 int rc;
880
881 rc = ops->get_sset_count(dev, ETH_SS_TEST);
882 if (rc >= 0)
883 info.testinfo_len = rc;
884 rc = ops->get_sset_count(dev, ETH_SS_STATS);
885 if (rc >= 0)
886 info.n_stats = rc;
Jeff Garzik339bf022007-08-15 16:01:32 -0700887 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
888 if (rc >= 0)
889 info.n_priv_flags = rc;
Jeff Garzikff03d492007-08-15 16:01:08 -0700890 }
Jiri Pirkoc03a14e2013-01-07 09:02:08 +0000891 if (ops->get_regs_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 info.regdump_len = ops->get_regs_len(dev);
Jiri Pirkoc03a14e2013-01-07 09:02:08 +0000893 if (ops->get_eeprom_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 info.eedump_len = ops->get_eeprom_len(dev);
895
896 if (copy_to_user(useraddr, &info, sizeof(info)))
897 return -EFAULT;
898 return 0;
899}
900
Eric Dumazetf5c445e2010-03-08 12:17:04 -0800901static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
chavey97f8aef2010-04-07 21:54:42 -0700902 void __user *useraddr)
Jeff Garzik723b2f52010-03-03 22:51:50 +0000903{
904 struct ethtool_sset_info info;
Jeff Garzik723b2f52010-03-03 22:51:50 +0000905 u64 sset_mask;
906 int i, idx = 0, n_bits = 0, ret, rc;
907 u32 *info_buf = NULL;
908
Jeff Garzik723b2f52010-03-03 22:51:50 +0000909 if (copy_from_user(&info, useraddr, sizeof(info)))
910 return -EFAULT;
911
912 /* store copy of mask, because we zero struct later on */
913 sset_mask = info.sset_mask;
914 if (!sset_mask)
915 return 0;
916
917 /* calculate size of return buffer */
Jeff Garzikd17792e2010-03-04 08:21:53 +0000918 n_bits = hweight64(sset_mask);
Jeff Garzik723b2f52010-03-03 22:51:50 +0000919
920 memset(&info, 0, sizeof(info));
921 info.cmd = ETHTOOL_GSSET_INFO;
922
923 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
924 if (!info_buf)
925 return -ENOMEM;
926
927 /*
928 * fill return buffer based on input bitmask and successful
929 * get_sset_count return
930 */
931 for (i = 0; i < 64; i++) {
932 if (!(sset_mask & (1ULL << i)))
933 continue;
934
Michał Mirosław340ae162011-02-15 16:59:16 +0000935 rc = __ethtool_get_sset_count(dev, i);
Jeff Garzik723b2f52010-03-03 22:51:50 +0000936 if (rc >= 0) {
937 info.sset_mask |= (1ULL << i);
938 info_buf[idx++] = rc;
939 }
940 }
941
942 ret = -EFAULT;
943 if (copy_to_user(useraddr, &info, sizeof(info)))
944 goto out;
945
946 useraddr += offsetof(struct ethtool_sset_info, data);
947 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
948 goto out;
949
950 ret = 0;
951
952out:
953 kfree(info_buf);
954 return ret;
955}
956
chavey97f8aef2010-04-07 21:54:42 -0700957static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
Ben Hutchingsbf988432010-06-28 08:45:58 +0000958 u32 cmd, void __user *useraddr)
Santwona Behera0853ad62008-07-02 03:47:41 -0700959{
Ben Hutchingsbf988432010-06-28 08:45:58 +0000960 struct ethtool_rxnfc info;
961 size_t info_size = sizeof(info);
Ben Hutchings55664f32012-01-03 12:04:51 +0000962 int rc;
Santwona Behera0853ad62008-07-02 03:47:41 -0700963
Santwona Behera59089d82009-02-20 00:58:13 -0800964 if (!dev->ethtool_ops->set_rxnfc)
Santwona Behera0853ad62008-07-02 03:47:41 -0700965 return -EOPNOTSUPP;
966
Ben Hutchingsbf988432010-06-28 08:45:58 +0000967 /* struct ethtool_rxnfc was originally defined for
968 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
969 * members. User-space might still be using that
970 * definition. */
971 if (cmd == ETHTOOL_SRXFH)
972 info_size = (offsetof(struct ethtool_rxnfc, data) +
973 sizeof(info.data));
974
975 if (copy_from_user(&info, useraddr, info_size))
Santwona Behera0853ad62008-07-02 03:47:41 -0700976 return -EFAULT;
977
Ben Hutchings55664f32012-01-03 12:04:51 +0000978 rc = dev->ethtool_ops->set_rxnfc(dev, &info);
979 if (rc)
980 return rc;
981
982 if (cmd == ETHTOOL_SRXCLSRLINS &&
983 copy_to_user(useraddr, &info, info_size))
984 return -EFAULT;
985
986 return 0;
Santwona Behera0853ad62008-07-02 03:47:41 -0700987}
988
chavey97f8aef2010-04-07 21:54:42 -0700989static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
Ben Hutchingsbf988432010-06-28 08:45:58 +0000990 u32 cmd, void __user *useraddr)
Santwona Behera0853ad62008-07-02 03:47:41 -0700991{
992 struct ethtool_rxnfc info;
Ben Hutchingsbf988432010-06-28 08:45:58 +0000993 size_t info_size = sizeof(info);
Santwona Behera59089d82009-02-20 00:58:13 -0800994 const struct ethtool_ops *ops = dev->ethtool_ops;
995 int ret;
996 void *rule_buf = NULL;
Santwona Behera0853ad62008-07-02 03:47:41 -0700997
Santwona Behera59089d82009-02-20 00:58:13 -0800998 if (!ops->get_rxnfc)
Santwona Behera0853ad62008-07-02 03:47:41 -0700999 return -EOPNOTSUPP;
1000
Ben Hutchingsbf988432010-06-28 08:45:58 +00001001 /* struct ethtool_rxnfc was originally defined for
1002 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
1003 * members. User-space might still be using that
1004 * definition. */
1005 if (cmd == ETHTOOL_GRXFH)
1006 info_size = (offsetof(struct ethtool_rxnfc, data) +
1007 sizeof(info.data));
1008
1009 if (copy_from_user(&info, useraddr, info_size))
Santwona Behera0853ad62008-07-02 03:47:41 -07001010 return -EFAULT;
1011
Santwona Behera59089d82009-02-20 00:58:13 -08001012 if (info.cmd == ETHTOOL_GRXCLSRLALL) {
1013 if (info.rule_cnt > 0) {
Ben Hutchingsdb048b62010-06-28 08:44:07 +00001014 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
Kees Cookae6df5f2010-10-07 10:03:48 +00001015 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
Ben Hutchingsdb048b62010-06-28 08:44:07 +00001016 GFP_USER);
Santwona Behera59089d82009-02-20 00:58:13 -08001017 if (!rule_buf)
1018 return -ENOMEM;
1019 }
1020 }
Santwona Behera0853ad62008-07-02 03:47:41 -07001021
Santwona Behera59089d82009-02-20 00:58:13 -08001022 ret = ops->get_rxnfc(dev, &info, rule_buf);
1023 if (ret < 0)
1024 goto err_out;
1025
1026 ret = -EFAULT;
Ben Hutchingsbf988432010-06-28 08:45:58 +00001027 if (copy_to_user(useraddr, &info, info_size))
Santwona Behera59089d82009-02-20 00:58:13 -08001028 goto err_out;
1029
1030 if (rule_buf) {
1031 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
1032 if (copy_to_user(useraddr, rule_buf,
1033 info.rule_cnt * sizeof(u32)))
1034 goto err_out;
1035 }
1036 ret = 0;
1037
1038err_out:
Wei Yongjunc9cacec2009-03-31 15:06:26 -07001039 kfree(rule_buf);
Santwona Behera59089d82009-02-20 00:58:13 -08001040
1041 return ret;
Santwona Behera0853ad62008-07-02 03:47:41 -07001042}
1043
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301044static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
1045 struct ethtool_rxnfc *rx_rings,
1046 u32 size)
1047{
Ben Hutchingsfb95cd82014-05-15 00:46:45 +01001048 int i;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301049
1050 if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
Ben Hutchingsfb95cd82014-05-15 00:46:45 +01001051 return -EFAULT;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301052
1053 /* Validate ring indices */
Ben Hutchingsfb95cd82014-05-15 00:46:45 +01001054 for (i = 0; i < size; i++)
1055 if (indir[i] >= rx_rings->data)
1056 return -EINVAL;
1057
1058 return 0;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301059}
1060
Kim Jonesba905f52016-02-02 03:51:16 +00001061u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
Eric Dumazet960fb622014-11-16 06:23:05 -08001062
1063void netdev_rss_key_fill(void *buffer, size_t len)
1064{
1065 BUG_ON(len > sizeof(netdev_rss_key));
1066 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key));
1067 memcpy(buffer, netdev_rss_key, len);
1068}
1069EXPORT_SYMBOL(netdev_rss_key_fill);
1070
Keller, Jacob Ed4ab4282016-02-08 16:05:03 -08001071static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
1072{
1073 u32 dev_size, current_max = 0;
1074 u32 *indir;
1075 int ret;
1076
1077 if (!dev->ethtool_ops->get_rxfh_indir_size ||
1078 !dev->ethtool_ops->get_rxfh)
1079 return -EOPNOTSUPP;
1080 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1081 if (dev_size == 0)
1082 return -EOPNOTSUPP;
1083
1084 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
1085 if (!indir)
1086 return -ENOMEM;
1087
1088 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
1089 if (ret)
1090 goto out;
1091
1092 while (dev_size--)
1093 current_max = max(current_max, indir[dev_size]);
1094
1095 *max = current_max;
1096
1097out:
1098 kfree(indir);
1099 return ret;
1100}
1101
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001102static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
1103 void __user *useraddr)
1104{
Ben Hutchings7850f632011-12-15 13:55:01 +00001105 u32 user_size, dev_size;
1106 u32 *indir;
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001107 int ret;
1108
Ben Hutchings7850f632011-12-15 13:55:01 +00001109 if (!dev->ethtool_ops->get_rxfh_indir_size ||
Ben Hutchingsfe62d002014-05-15 01:25:27 +01001110 !dev->ethtool_ops->get_rxfh)
Ben Hutchings7850f632011-12-15 13:55:01 +00001111 return -EOPNOTSUPP;
1112 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
1113 if (dev_size == 0)
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001114 return -EOPNOTSUPP;
1115
Ben Hutchings7850f632011-12-15 13:55:01 +00001116 if (copy_from_user(&user_size,
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001117 useraddr + offsetof(struct ethtool_rxfh_indir, size),
Ben Hutchings7850f632011-12-15 13:55:01 +00001118 sizeof(user_size)))
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001119 return -EFAULT;
1120
Ben Hutchings7850f632011-12-15 13:55:01 +00001121 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size),
1122 &dev_size, sizeof(dev_size)))
1123 return -EFAULT;
1124
1125 /* If the user buffer size is 0, this is just a query for the
1126 * device table size. Otherwise, if it's smaller than the
1127 * device table size it's an error.
1128 */
1129 if (user_size < dev_size)
1130 return user_size == 0 ? 0 : -EINVAL;
1131
1132 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001133 if (!indir)
1134 return -ENOMEM;
1135
Eyal Perry892311f2014-12-02 18:12:10 +02001136 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001137 if (ret)
1138 goto out;
1139
Ben Hutchings7850f632011-12-15 13:55:01 +00001140 if (copy_to_user(useraddr +
1141 offsetof(struct ethtool_rxfh_indir, ring_index[0]),
1142 indir, dev_size * sizeof(indir[0])))
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001143 ret = -EFAULT;
1144
1145out:
1146 kfree(indir);
1147 return ret;
1148}
1149
1150static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
1151 void __user *useraddr)
1152{
Ben Hutchings7850f632011-12-15 13:55:01 +00001153 struct ethtool_rxnfc rx_rings;
1154 u32 user_size, dev_size, i;
1155 u32 *indir;
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001156 const struct ethtool_ops *ops = dev->ethtool_ops;
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001157 int ret;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301158 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001159
Ben Hutchingsfe62d002014-05-15 01:25:27 +01001160 if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001161 !ops->get_rxnfc)
Ben Hutchings7850f632011-12-15 13:55:01 +00001162 return -EOPNOTSUPP;
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001163
1164 dev_size = ops->get_rxfh_indir_size(dev);
Ben Hutchings7850f632011-12-15 13:55:01 +00001165 if (dev_size == 0)
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001166 return -EOPNOTSUPP;
1167
Ben Hutchings7850f632011-12-15 13:55:01 +00001168 if (copy_from_user(&user_size,
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001169 useraddr + offsetof(struct ethtool_rxfh_indir, size),
Ben Hutchings7850f632011-12-15 13:55:01 +00001170 sizeof(user_size)))
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001171 return -EFAULT;
1172
Ben Hutchings278bc422011-12-15 13:56:49 +00001173 if (user_size != 0 && user_size != dev_size)
Ben Hutchings7850f632011-12-15 13:55:01 +00001174 return -EINVAL;
1175
1176 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001177 if (!indir)
1178 return -ENOMEM;
1179
Ben Hutchings7850f632011-12-15 13:55:01 +00001180 rx_rings.cmd = ETHTOOL_GRXRINGS;
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001181 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
Ben Hutchings7850f632011-12-15 13:55:01 +00001182 if (ret)
1183 goto out;
Ben Hutchings278bc422011-12-15 13:56:49 +00001184
1185 if (user_size == 0) {
1186 for (i = 0; i < dev_size; i++)
1187 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1188 } else {
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301189 ret = ethtool_copy_validate_indir(indir,
1190 useraddr + ringidx_offset,
1191 &rx_rings,
1192 dev_size);
1193 if (ret)
Ben Hutchings7850f632011-12-15 13:55:01 +00001194 goto out;
Ben Hutchings7850f632011-12-15 13:55:01 +00001195 }
1196
Eyal Perry892311f2014-12-02 18:12:10 +02001197 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE);
Keller, Jacob Ed4ab4282016-02-08 16:05:03 -08001198 if (ret)
1199 goto out;
1200
1201 /* indicate whether rxfh was set to default */
1202 if (user_size == 0)
1203 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1204 else
1205 dev->priv_flags |= IFF_RXFH_CONFIGURED;
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00001206
1207out:
1208 kfree(indir);
1209 return ret;
1210}
1211
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301212static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
1213 void __user *useraddr)
1214{
1215 int ret;
1216 const struct ethtool_ops *ops = dev->ethtool_ops;
Ben Hutchingsf062a382014-05-15 16:28:07 +01001217 u32 user_indir_size, user_key_size;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301218 u32 dev_indir_size = 0, dev_key_size = 0;
Ben Hutchingsf062a382014-05-15 16:28:07 +01001219 struct ethtool_rxfh rxfh;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301220 u32 total_size;
Ben Hutchingsf062a382014-05-15 16:28:07 +01001221 u32 indir_bytes;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301222 u32 *indir = NULL;
Eyal Perry892311f2014-12-02 18:12:10 +02001223 u8 dev_hfunc = 0;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301224 u8 *hkey = NULL;
1225 u8 *rss_config;
1226
Eyal Perry892311f2014-12-02 18:12:10 +02001227 if (!ops->get_rxfh)
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301228 return -EOPNOTSUPP;
1229
1230 if (ops->get_rxfh_indir_size)
1231 dev_indir_size = ops->get_rxfh_indir_size(dev);
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301232 if (ops->get_rxfh_key_size)
1233 dev_key_size = ops->get_rxfh_key_size(dev);
1234
Ben Hutchingsf062a382014-05-15 16:28:07 +01001235 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301236 return -EFAULT;
Ben Hutchingsf062a382014-05-15 16:28:07 +01001237 user_indir_size = rxfh.indir_size;
1238 user_key_size = rxfh.key_size;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301239
Ben Hutchingsf062a382014-05-15 16:28:07 +01001240 /* Check that reserved fields are 0 for now */
Eyal Perry892311f2014-12-02 18:12:10 +02001241 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1242 rxfh.rsvd8[2] || rxfh.rsvd32)
Ben Hutchingsf062a382014-05-15 16:28:07 +01001243 return -EINVAL;
1244
1245 rxfh.indir_size = dev_indir_size;
1246 rxfh.key_size = dev_key_size;
1247 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301248 return -EFAULT;
1249
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301250 if ((user_indir_size && (user_indir_size != dev_indir_size)) ||
1251 (user_key_size && (user_key_size != dev_key_size)))
1252 return -EINVAL;
1253
1254 indir_bytes = user_indir_size * sizeof(indir[0]);
1255 total_size = indir_bytes + user_key_size;
1256 rss_config = kzalloc(total_size, GFP_USER);
1257 if (!rss_config)
1258 return -ENOMEM;
1259
1260 if (user_indir_size)
1261 indir = (u32 *)rss_config;
1262
1263 if (user_key_size)
1264 hkey = rss_config + indir_bytes;
1265
Eyal Perry892311f2014-12-02 18:12:10 +02001266 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc);
1267 if (ret)
1268 goto out;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301269
Eyal Perry892311f2014-12-02 18:12:10 +02001270 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc),
1271 &dev_hfunc, sizeof(rxfh.hfunc))) {
1272 ret = -EFAULT;
1273 } else if (copy_to_user(useraddr +
1274 offsetof(struct ethtool_rxfh, rss_config[0]),
1275 rss_config, total_size)) {
1276 ret = -EFAULT;
1277 }
1278out:
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301279 kfree(rss_config);
1280
1281 return ret;
1282}
1283
1284static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
1285 void __user *useraddr)
1286{
1287 int ret;
1288 const struct ethtool_ops *ops = dev->ethtool_ops;
1289 struct ethtool_rxnfc rx_rings;
Ben Hutchingsf062a382014-05-15 16:28:07 +01001290 struct ethtool_rxfh rxfh;
1291 u32 dev_indir_size = 0, dev_key_size = 0, i;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301292 u32 *indir = NULL, indir_bytes = 0;
1293 u8 *hkey = NULL;
1294 u8 *rss_config;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301295 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
1296
Eyal Perry892311f2014-12-02 18:12:10 +02001297 if (!ops->get_rxnfc || !ops->set_rxfh)
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301298 return -EOPNOTSUPP;
1299
1300 if (ops->get_rxfh_indir_size)
1301 dev_indir_size = ops->get_rxfh_indir_size(dev);
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301302 if (ops->get_rxfh_key_size)
Dan Carpenterd340c862015-02-20 13:54:05 +03001303 dev_key_size = ops->get_rxfh_key_size(dev);
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301304
Ben Hutchingsf062a382014-05-15 16:28:07 +01001305 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301306 return -EFAULT;
1307
Ben Hutchingsf062a382014-05-15 16:28:07 +01001308 /* Check that reserved fields are 0 for now */
Eyal Perry892311f2014-12-02 18:12:10 +02001309 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] ||
1310 rxfh.rsvd8[2] || rxfh.rsvd32)
Ben Hutchingsf062a382014-05-15 16:28:07 +01001311 return -EINVAL;
1312
Eyal Perry892311f2014-12-02 18:12:10 +02001313 /* If either indir, hash key or function is valid, proceed further.
1314 * Must request at least one change: indir size, hash key or function.
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301315 */
Ben Hutchingsf062a382014-05-15 16:28:07 +01001316 if ((rxfh.indir_size &&
1317 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
1318 rxfh.indir_size != dev_indir_size) ||
1319 (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
1320 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
Eyal Perry892311f2014-12-02 18:12:10 +02001321 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE))
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301322 return -EINVAL;
1323
Ben Hutchingsf062a382014-05-15 16:28:07 +01001324 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301325 indir_bytes = dev_indir_size * sizeof(indir[0]);
1326
Ben Hutchingsf062a382014-05-15 16:28:07 +01001327 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301328 if (!rss_config)
1329 return -ENOMEM;
1330
1331 rx_rings.cmd = ETHTOOL_GRXRINGS;
1332 ret = ops->get_rxnfc(dev, &rx_rings, NULL);
1333 if (ret)
1334 goto out;
1335
Ben Hutchingsf062a382014-05-15 16:28:07 +01001336 /* rxfh.indir_size == 0 means reset the indir table to default.
1337 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301338 */
Ben Hutchingsf062a382014-05-15 16:28:07 +01001339 if (rxfh.indir_size &&
1340 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301341 indir = (u32 *)rss_config;
1342 ret = ethtool_copy_validate_indir(indir,
1343 useraddr + rss_cfg_offset,
1344 &rx_rings,
Ben Hutchingsf062a382014-05-15 16:28:07 +01001345 rxfh.indir_size);
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301346 if (ret)
1347 goto out;
Ben Hutchingsf062a382014-05-15 16:28:07 +01001348 } else if (rxfh.indir_size == 0) {
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301349 indir = (u32 *)rss_config;
1350 for (i = 0; i < dev_indir_size; i++)
1351 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
1352 }
1353
Ben Hutchingsf062a382014-05-15 16:28:07 +01001354 if (rxfh.key_size) {
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301355 hkey = rss_config + indir_bytes;
1356 if (copy_from_user(hkey,
1357 useraddr + rss_cfg_offset + indir_bytes,
Ben Hutchingsf062a382014-05-15 16:28:07 +01001358 rxfh.key_size)) {
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301359 ret = -EFAULT;
1360 goto out;
1361 }
1362 }
1363
Eyal Perry892311f2014-12-02 18:12:10 +02001364 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc);
Keller, Jacob Ed4ab4282016-02-08 16:05:03 -08001365 if (ret)
1366 goto out;
1367
1368 /* indicate whether rxfh was set to default */
1369 if (rxfh.indir_size == 0)
1370 dev->priv_flags &= ~IFF_RXFH_CONFIGURED;
1371 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
1372 dev->priv_flags |= IFF_RXFH_CONFIGURED;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05301373
1374out:
1375 kfree(rss_config);
1376 return ret;
1377}
1378
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1380{
1381 struct ethtool_regs regs;
Stephen Hemminger76fd8592006-09-08 11:16:13 -07001382 const struct ethtool_ops *ops = dev->ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 void *regbuf;
1384 int reglen, ret;
1385
1386 if (!ops->get_regs || !ops->get_regs_len)
1387 return -EOPNOTSUPP;
1388
1389 if (copy_from_user(&regs, useraddr, sizeof(regs)))
1390 return -EFAULT;
1391
1392 reglen = ops->get_regs_len(dev);
1393 if (regs.len > reglen)
1394 regs.len = reglen;
1395
Eugene Teob7c7d012011-01-24 21:05:17 -08001396 regbuf = vzalloc(reglen);
Ben Hutchings67ae7cf2011-07-21 15:25:30 -07001397 if (reglen && !regbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398 return -ENOMEM;
1399
1400 ops->get_regs(dev, &regs, regbuf);
1401
1402 ret = -EFAULT;
1403 if (copy_to_user(useraddr, &regs, sizeof(regs)))
1404 goto out;
1405 useraddr += offsetof(struct ethtool_regs, data);
Ben Hutchings67ae7cf2011-07-21 15:25:30 -07001406 if (regbuf && copy_to_user(useraddr, regbuf, regs.len))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 goto out;
1408 ret = 0;
1409
1410 out:
Ben Hutchingsa77f5db2010-09-20 08:42:17 +00001411 vfree(regbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 return ret;
1413}
1414
Ben Hutchingsd73d3a82009-10-05 10:59:58 +00001415static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1416{
1417 struct ethtool_value reset;
1418 int ret;
1419
1420 if (!dev->ethtool_ops->reset)
1421 return -EOPNOTSUPP;
1422
1423 if (copy_from_user(&reset, useraddr, sizeof(reset)))
1424 return -EFAULT;
1425
1426 ret = dev->ethtool_ops->reset(dev, &reset.data);
1427 if (ret)
1428 return ret;
1429
1430 if (copy_to_user(useraddr, &reset, sizeof(reset)))
1431 return -EFAULT;
1432 return 0;
1433}
1434
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1436{
Roland Dreier8e557422010-02-11 12:14:23 -08001437 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438
1439 if (!dev->ethtool_ops->get_wol)
1440 return -EOPNOTSUPP;
1441
1442 dev->ethtool_ops->get_wol(dev, &wol);
1443
1444 if (copy_to_user(useraddr, &wol, sizeof(wol)))
1445 return -EFAULT;
1446 return 0;
1447}
1448
1449static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1450{
1451 struct ethtool_wolinfo wol;
1452
1453 if (!dev->ethtool_ops->set_wol)
1454 return -EOPNOTSUPP;
1455
1456 if (copy_from_user(&wol, useraddr, sizeof(wol)))
1457 return -EFAULT;
1458
1459 return dev->ethtool_ops->set_wol(dev, &wol);
1460}
1461
Yuval Mintz80f12ec2012-06-06 17:13:06 +00001462static int ethtool_get_eee(struct net_device *dev, char __user *useraddr)
1463{
1464 struct ethtool_eee edata;
1465 int rc;
1466
1467 if (!dev->ethtool_ops->get_eee)
1468 return -EOPNOTSUPP;
1469
1470 memset(&edata, 0, sizeof(struct ethtool_eee));
1471 edata.cmd = ETHTOOL_GEEE;
1472 rc = dev->ethtool_ops->get_eee(dev, &edata);
1473
1474 if (rc)
1475 return rc;
1476
1477 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1478 return -EFAULT;
1479
1480 return 0;
1481}
1482
1483static int ethtool_set_eee(struct net_device *dev, char __user *useraddr)
1484{
1485 struct ethtool_eee edata;
1486
1487 if (!dev->ethtool_ops->set_eee)
1488 return -EOPNOTSUPP;
1489
1490 if (copy_from_user(&edata, useraddr, sizeof(edata)))
1491 return -EFAULT;
1492
1493 return dev->ethtool_ops->set_eee(dev, &edata);
1494}
1495
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496static int ethtool_nway_reset(struct net_device *dev)
1497{
1498 if (!dev->ethtool_ops->nway_reset)
1499 return -EOPNOTSUPP;
1500
1501 return dev->ethtool_ops->nway_reset(dev);
1502}
1503
Ben Hutchingse596e6e2010-12-09 12:08:35 +00001504static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1505{
1506 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1507
1508 if (!dev->ethtool_ops->get_link)
1509 return -EOPNOTSUPP;
1510
1511 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1512
1513 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1514 return -EFAULT;
1515 return 0;
1516}
1517
Ben Hutchings081d0942012-04-12 00:42:12 +00001518static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr,
1519 int (*getter)(struct net_device *,
1520 struct ethtool_eeprom *, u8 *),
1521 u32 total_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522{
1523 struct ethtool_eeprom eeprom;
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001524 void __user *userbuf = useraddr + sizeof(eeprom);
1525 u32 bytes_remaining;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526 u8 *data;
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001527 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1530 return -EFAULT;
1531
1532 /* Check for wrap and zero */
1533 if (eeprom.offset + eeprom.len <= eeprom.offset)
1534 return -EINVAL;
1535
1536 /* Check for exceeding total eeprom len */
Ben Hutchings081d0942012-04-12 00:42:12 +00001537 if (eeprom.offset + eeprom.len > total_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 return -EINVAL;
1539
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001540 data = kmalloc(PAGE_SIZE, GFP_USER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541 if (!data)
1542 return -ENOMEM;
1543
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001544 bytes_remaining = eeprom.len;
1545 while (bytes_remaining > 0) {
1546 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547
Ben Hutchings081d0942012-04-12 00:42:12 +00001548 ret = getter(dev, &eeprom, data);
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001549 if (ret)
1550 break;
1551 if (copy_to_user(userbuf, data, eeprom.len)) {
1552 ret = -EFAULT;
1553 break;
1554 }
1555 userbuf += eeprom.len;
1556 eeprom.offset += eeprom.len;
1557 bytes_remaining -= eeprom.len;
1558 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559
Mandeep Singh Bainesc5835df2008-04-24 20:55:56 -07001560 eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1561 eeprom.offset -= eeprom.len;
1562 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1563 ret = -EFAULT;
1564
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565 kfree(data);
1566 return ret;
1567}
1568
Ben Hutchings081d0942012-04-12 00:42:12 +00001569static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1570{
1571 const struct ethtool_ops *ops = dev->ethtool_ops;
1572
Guenter Roecke0fb6fb2014-10-30 20:50:15 -07001573 if (!ops->get_eeprom || !ops->get_eeprom_len ||
1574 !ops->get_eeprom_len(dev))
Ben Hutchings081d0942012-04-12 00:42:12 +00001575 return -EOPNOTSUPP;
1576
1577 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom,
1578 ops->get_eeprom_len(dev));
1579}
1580
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1582{
1583 struct ethtool_eeprom eeprom;
Stephen Hemminger76fd8592006-09-08 11:16:13 -07001584 const struct ethtool_ops *ops = dev->ethtool_ops;
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001585 void __user *userbuf = useraddr + sizeof(eeprom);
1586 u32 bytes_remaining;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587 u8 *data;
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001588 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589
Guenter Roecke0fb6fb2014-10-30 20:50:15 -07001590 if (!ops->set_eeprom || !ops->get_eeprom_len ||
1591 !ops->get_eeprom_len(dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592 return -EOPNOTSUPP;
1593
1594 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1595 return -EFAULT;
1596
1597 /* Check for wrap and zero */
1598 if (eeprom.offset + eeprom.len <= eeprom.offset)
1599 return -EINVAL;
1600
1601 /* Check for exceeding total eeprom len */
1602 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1603 return -EINVAL;
1604
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001605 data = kmalloc(PAGE_SIZE, GFP_USER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606 if (!data)
1607 return -ENOMEM;
1608
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001609 bytes_remaining = eeprom.len;
1610 while (bytes_remaining > 0) {
1611 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612
Mandeep Singh Bainesb131dd52008-04-15 19:24:17 -07001613 if (copy_from_user(data, userbuf, eeprom.len)) {
1614 ret = -EFAULT;
1615 break;
1616 }
1617 ret = ops->set_eeprom(dev, &eeprom, data);
1618 if (ret)
1619 break;
1620 userbuf += eeprom.len;
1621 eeprom.offset += eeprom.len;
1622 bytes_remaining -= eeprom.len;
1623 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625 kfree(data);
1626 return ret;
1627}
1628
chavey97f8aef2010-04-07 21:54:42 -07001629static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1630 void __user *useraddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631{
Roland Dreier8e557422010-02-11 12:14:23 -08001632 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633
1634 if (!dev->ethtool_ops->get_coalesce)
1635 return -EOPNOTSUPP;
1636
1637 dev->ethtool_ops->get_coalesce(dev, &coalesce);
1638
1639 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1640 return -EFAULT;
1641 return 0;
1642}
1643
chavey97f8aef2010-04-07 21:54:42 -07001644static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1645 void __user *useraddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646{
1647 struct ethtool_coalesce coalesce;
1648
David S. Millerfa04ae52005-06-06 15:07:19 -07001649 if (!dev->ethtool_ops->set_coalesce)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650 return -EOPNOTSUPP;
1651
1652 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1653 return -EFAULT;
1654
1655 return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1656}
1657
1658static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1659{
Roland Dreier8e557422010-02-11 12:14:23 -08001660 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001661
1662 if (!dev->ethtool_ops->get_ringparam)
1663 return -EOPNOTSUPP;
1664
1665 dev->ethtool_ops->get_ringparam(dev, &ringparam);
1666
1667 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1668 return -EFAULT;
1669 return 0;
1670}
1671
1672static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1673{
1674 struct ethtool_ringparam ringparam;
1675
1676 if (!dev->ethtool_ops->set_ringparam)
1677 return -EOPNOTSUPP;
1678
1679 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1680 return -EFAULT;
1681
1682 return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1683}
1684
amit salecha8b5933c2011-04-07 01:58:42 +00001685static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1686 void __user *useraddr)
1687{
1688 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1689
1690 if (!dev->ethtool_ops->get_channels)
1691 return -EOPNOTSUPP;
1692
1693 dev->ethtool_ops->get_channels(dev, &channels);
1694
1695 if (copy_to_user(useraddr, &channels, sizeof(channels)))
1696 return -EFAULT;
1697 return 0;
1698}
1699
1700static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1701 void __user *useraddr)
1702{
Keller, Jacob E8bf36862016-02-08 16:05:04 -08001703 struct ethtool_channels channels, max;
Keller, Jacob Ed4ab4282016-02-08 16:05:03 -08001704 u32 max_rx_in_use = 0;
amit salecha8b5933c2011-04-07 01:58:42 +00001705
Keller, Jacob E8bf36862016-02-08 16:05:04 -08001706 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
amit salecha8b5933c2011-04-07 01:58:42 +00001707 return -EOPNOTSUPP;
1708
1709 if (copy_from_user(&channels, useraddr, sizeof(channels)))
1710 return -EFAULT;
1711
Keller, Jacob E8bf36862016-02-08 16:05:04 -08001712 dev->ethtool_ops->get_channels(dev, &max);
1713
1714 /* ensure new counts are within the maximums */
1715 if ((channels.rx_count > max.max_rx) ||
1716 (channels.tx_count > max.max_tx) ||
1717 (channels.combined_count > max.max_combined) ||
1718 (channels.other_count > max.max_other))
1719 return -EINVAL;
1720
Keller, Jacob Ed4ab4282016-02-08 16:05:03 -08001721 /* ensure the new Rx count fits within the configured Rx flow
1722 * indirection table settings */
1723 if (netif_is_rxfh_configured(dev) &&
1724 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
1725 (channels.combined_count + channels.rx_count) <= max_rx_in_use)
1726 return -EINVAL;
1727
amit salecha8b5933c2011-04-07 01:58:42 +00001728 return dev->ethtool_ops->set_channels(dev, &channels);
1729}
1730
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1732{
1733 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1734
1735 if (!dev->ethtool_ops->get_pauseparam)
1736 return -EOPNOTSUPP;
1737
1738 dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1739
1740 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1741 return -EFAULT;
1742 return 0;
1743}
1744
1745static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1746{
1747 struct ethtool_pauseparam pauseparam;
1748
Jeff Garzike1b90c42006-07-17 12:54:40 -04001749 if (!dev->ethtool_ops->set_pauseparam)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001750 return -EOPNOTSUPP;
1751
1752 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1753 return -EFAULT;
1754
1755 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1756}
1757
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1759{
1760 struct ethtool_test test;
Stephen Hemminger76fd8592006-09-08 11:16:13 -07001761 const struct ethtool_ops *ops = dev->ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762 u64 *data;
Jeff Garzikff03d492007-08-15 16:01:08 -07001763 int ret, test_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764
Ben Hutchingsa9828ec2009-10-01 11:33:03 +00001765 if (!ops->self_test || !ops->get_sset_count)
Jeff Garzikff03d492007-08-15 16:01:08 -07001766 return -EOPNOTSUPP;
1767
Ben Hutchingsa9828ec2009-10-01 11:33:03 +00001768 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
Jeff Garzikff03d492007-08-15 16:01:08 -07001769 if (test_len < 0)
1770 return test_len;
1771 WARN_ON(test_len == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772
1773 if (copy_from_user(&test, useraddr, sizeof(test)))
1774 return -EFAULT;
1775
Jeff Garzikff03d492007-08-15 16:01:08 -07001776 test.len = test_len;
1777 data = kmalloc(test_len * sizeof(u64), GFP_USER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778 if (!data)
1779 return -ENOMEM;
1780
1781 ops->self_test(dev, &test, data);
1782
1783 ret = -EFAULT;
1784 if (copy_to_user(useraddr, &test, sizeof(test)))
1785 goto out;
1786 useraddr += sizeof(test);
1787 if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1788 goto out;
1789 ret = 0;
1790
1791 out:
1792 kfree(data);
1793 return ret;
1794}
1795
1796static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1797{
1798 struct ethtool_gstrings gstrings;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799 u8 *data;
1800 int ret;
1801
Linus Torvalds1da177e2005-04-16 15:20:36 -07001802 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1803 return -EFAULT;
1804
Michał Mirosław340ae162011-02-15 16:59:16 +00001805 ret = __ethtool_get_sset_count(dev, gstrings.string_set);
Ben Hutchingsa9828ec2009-10-01 11:33:03 +00001806 if (ret < 0)
1807 return ret;
Jeff Garzikff03d492007-08-15 16:01:08 -07001808
Ben Hutchingsa9828ec2009-10-01 11:33:03 +00001809 gstrings.len = ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810
Joe Perches077cb372015-10-14 01:09:40 -07001811 data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812 if (!data)
1813 return -ENOMEM;
1814
Michał Mirosław340ae162011-02-15 16:59:16 +00001815 __ethtool_get_strings(dev, gstrings.string_set, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816
1817 ret = -EFAULT;
1818 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1819 goto out;
1820 useraddr += sizeof(gstrings);
1821 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1822 goto out;
1823 ret = 0;
1824
Michał Mirosław340ae162011-02-15 16:59:16 +00001825out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826 kfree(data);
1827 return ret;
1828}
1829
1830static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1831{
1832 struct ethtool_value id;
Ben Hutchings68f512f2011-04-02 00:35:15 +01001833 static bool busy;
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001834 const struct ethtool_ops *ops = dev->ethtool_ops;
Ben Hutchings68f512f2011-04-02 00:35:15 +01001835 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001837 if (!ops->set_phys_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838 return -EOPNOTSUPP;
1839
Ben Hutchings68f512f2011-04-02 00:35:15 +01001840 if (busy)
1841 return -EBUSY;
1842
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843 if (copy_from_user(&id, useraddr, sizeof(id)))
1844 return -EFAULT;
1845
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001846 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
Allan, Bruce Wfce55922011-04-13 13:09:10 +00001847 if (rc < 0)
Ben Hutchings68f512f2011-04-02 00:35:15 +01001848 return rc;
1849
1850 /* Drop the RTNL lock while waiting, but prevent reentry or
1851 * removal of the device.
1852 */
1853 busy = true;
1854 dev_hold(dev);
1855 rtnl_unlock();
1856
1857 if (rc == 0) {
1858 /* Driver will handle this itself */
1859 schedule_timeout_interruptible(
Allan, Bruce W143780c2011-04-11 13:01:59 +00001860 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
Ben Hutchings68f512f2011-04-02 00:35:15 +01001861 } else {
Allan, Bruce Wfce55922011-04-13 13:09:10 +00001862 /* Driver expects to be called at twice the frequency in rc */
1863 int n = rc * 2, i, interval = HZ / n;
Ben Hutchings68f512f2011-04-02 00:35:15 +01001864
Allan, Bruce Wfce55922011-04-13 13:09:10 +00001865 /* Count down seconds */
1866 do {
1867 /* Count down iterations per second */
1868 i = n;
1869 do {
1870 rtnl_lock();
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001871 rc = ops->set_phys_id(dev,
Allan, Bruce Wfce55922011-04-13 13:09:10 +00001872 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1873 rtnl_unlock();
1874 if (rc)
1875 break;
1876 schedule_timeout_interruptible(interval);
1877 } while (!signal_pending(current) && --i != 0);
Ben Hutchings68f512f2011-04-02 00:35:15 +01001878 } while (!signal_pending(current) &&
1879 (id.data == 0 || --id.data != 0));
1880 }
1881
1882 rtnl_lock();
1883 dev_put(dev);
1884 busy = false;
1885
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00001886 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
Ben Hutchings68f512f2011-04-02 00:35:15 +01001887 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888}
1889
1890static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1891{
1892 struct ethtool_stats stats;
Stephen Hemminger76fd8592006-09-08 11:16:13 -07001893 const struct ethtool_ops *ops = dev->ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894 u64 *data;
Jeff Garzikff03d492007-08-15 16:01:08 -07001895 int ret, n_stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896
Ben Hutchingsa9828ec2009-10-01 11:33:03 +00001897 if (!ops->get_ethtool_stats || !ops->get_sset_count)
Jeff Garzikff03d492007-08-15 16:01:08 -07001898 return -EOPNOTSUPP;
1899
Ben Hutchingsa9828ec2009-10-01 11:33:03 +00001900 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
Jeff Garzikff03d492007-08-15 16:01:08 -07001901 if (n_stats < 0)
1902 return n_stats;
1903 WARN_ON(n_stats == 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904
1905 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1906 return -EFAULT;
1907
Jeff Garzikff03d492007-08-15 16:01:08 -07001908 stats.n_stats = n_stats;
1909 data = kmalloc(n_stats * sizeof(u64), GFP_USER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910 if (!data)
1911 return -ENOMEM;
1912
1913 ops->get_ethtool_stats(dev, &stats, data);
1914
1915 ret = -EFAULT;
1916 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1917 goto out;
1918 useraddr += sizeof(stats);
1919 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1920 goto out;
1921 ret = 0;
1922
1923 out:
1924 kfree(data);
1925 return ret;
1926}
1927
Andrew Lunnf3a40942015-12-30 16:28:25 +01001928static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr)
1929{
1930 struct ethtool_stats stats;
1931 struct phy_device *phydev = dev->phydev;
1932 u64 *data;
1933 int ret, n_stats;
1934
1935 if (!phydev)
1936 return -EOPNOTSUPP;
1937
1938 n_stats = phy_get_sset_count(phydev);
1939
1940 if (n_stats < 0)
1941 return n_stats;
1942 WARN_ON(n_stats == 0);
1943
1944 if (copy_from_user(&stats, useraddr, sizeof(stats)))
1945 return -EFAULT;
1946
1947 stats.n_stats = n_stats;
1948 data = kmalloc_array(n_stats, sizeof(u64), GFP_USER);
1949 if (!data)
1950 return -ENOMEM;
1951
1952 mutex_lock(&phydev->lock);
1953 phydev->drv->get_stats(phydev, &stats, data);
1954 mutex_unlock(&phydev->lock);
1955
1956 ret = -EFAULT;
1957 if (copy_to_user(useraddr, &stats, sizeof(stats)))
1958 goto out;
1959 useraddr += sizeof(stats);
1960 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1961 goto out;
1962 ret = 0;
1963
1964 out:
1965 kfree(data);
1966 return ret;
1967}
1968
viro@ftp.linux.org.uk0bf0519d2005-09-05 03:26:18 +01001969static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
Jon Wetzela6f9a702005-08-20 17:15:54 -07001970{
1971 struct ethtool_perm_addr epaddr;
Jon Wetzela6f9a702005-08-20 17:15:54 -07001972
Matthew Wilcox313674a2007-07-31 14:00:29 -07001973 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
Jon Wetzela6f9a702005-08-20 17:15:54 -07001974 return -EFAULT;
1975
Matthew Wilcox313674a2007-07-31 14:00:29 -07001976 if (epaddr.size < dev->addr_len)
1977 return -ETOOSMALL;
1978 epaddr.size = dev->addr_len;
Jon Wetzela6f9a702005-08-20 17:15:54 -07001979
Jon Wetzela6f9a702005-08-20 17:15:54 -07001980 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
Matthew Wilcox313674a2007-07-31 14:00:29 -07001981 return -EFAULT;
Jon Wetzela6f9a702005-08-20 17:15:54 -07001982 useraddr += sizeof(epaddr);
Matthew Wilcox313674a2007-07-31 14:00:29 -07001983 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1984 return -EFAULT;
1985 return 0;
Jon Wetzela6f9a702005-08-20 17:15:54 -07001986}
1987
Jeff Garzik13c99b22007-08-15 16:01:56 -07001988static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1989 u32 cmd, u32 (*actor)(struct net_device *))
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07001990{
Roland Dreier8e557422010-02-11 12:14:23 -08001991 struct ethtool_value edata = { .cmd = cmd };
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07001992
Jeff Garzik13c99b22007-08-15 16:01:56 -07001993 if (!actor)
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07001994 return -EOPNOTSUPP;
1995
Jeff Garzik13c99b22007-08-15 16:01:56 -07001996 edata.data = actor(dev);
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07001997
1998 if (copy_to_user(useraddr, &edata, sizeof(edata)))
1999 return -EFAULT;
2000 return 0;
2001}
2002
Jeff Garzik13c99b22007-08-15 16:01:56 -07002003static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
2004 void (*actor)(struct net_device *, u32))
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07002005{
2006 struct ethtool_value edata;
2007
Jeff Garzik13c99b22007-08-15 16:01:56 -07002008 if (!actor)
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07002009 return -EOPNOTSUPP;
2010
2011 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2012 return -EFAULT;
2013
Jeff Garzik13c99b22007-08-15 16:01:56 -07002014 actor(dev, edata.data);
Jeff Garzik339bf022007-08-15 16:01:32 -07002015 return 0;
2016}
2017
Jeff Garzik13c99b22007-08-15 16:01:56 -07002018static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
2019 int (*actor)(struct net_device *, u32))
Jeff Garzik339bf022007-08-15 16:01:32 -07002020{
2021 struct ethtool_value edata;
2022
Jeff Garzik13c99b22007-08-15 16:01:56 -07002023 if (!actor)
Jeff Garzik339bf022007-08-15 16:01:32 -07002024 return -EOPNOTSUPP;
2025
2026 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2027 return -EFAULT;
2028
Jeff Garzik13c99b22007-08-15 16:01:56 -07002029 return actor(dev, edata.data);
Jeff Garzik339bf022007-08-15 16:01:32 -07002030}
2031
chavey97f8aef2010-04-07 21:54:42 -07002032static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
2033 char __user *useraddr)
Ajit Khaparde05c6a8d2009-09-02 17:02:55 +00002034{
2035 struct ethtool_flash efl;
2036
2037 if (copy_from_user(&efl, useraddr, sizeof(efl)))
2038 return -EFAULT;
2039
2040 if (!dev->ethtool_ops->flash_device)
2041 return -EOPNOTSUPP;
2042
Ben Hutchings786f5282012-02-01 09:32:25 +00002043 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0;
2044
Ajit Khaparde05c6a8d2009-09-02 17:02:55 +00002045 return dev->ethtool_ops->flash_device(dev, &efl);
2046}
2047
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002048static int ethtool_set_dump(struct net_device *dev,
2049 void __user *useraddr)
2050{
2051 struct ethtool_dump dump;
2052
2053 if (!dev->ethtool_ops->set_dump)
2054 return -EOPNOTSUPP;
2055
2056 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2057 return -EFAULT;
2058
2059 return dev->ethtool_ops->set_dump(dev, &dump);
2060}
2061
2062static int ethtool_get_dump_flag(struct net_device *dev,
2063 void __user *useraddr)
2064{
2065 int ret;
2066 struct ethtool_dump dump;
2067 const struct ethtool_ops *ops = dev->ethtool_ops;
2068
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00002069 if (!ops->get_dump_flag)
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002070 return -EOPNOTSUPP;
2071
2072 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2073 return -EFAULT;
2074
2075 ret = ops->get_dump_flag(dev, &dump);
2076 if (ret)
2077 return ret;
2078
2079 if (copy_to_user(useraddr, &dump, sizeof(dump)))
2080 return -EFAULT;
2081 return 0;
2082}
2083
2084static int ethtool_get_dump_data(struct net_device *dev,
2085 void __user *useraddr)
2086{
2087 int ret;
2088 __u32 len;
2089 struct ethtool_dump dump, tmp;
2090 const struct ethtool_ops *ops = dev->ethtool_ops;
2091 void *data = NULL;
2092
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00002093 if (!ops->get_dump_data || !ops->get_dump_flag)
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002094 return -EOPNOTSUPP;
2095
2096 if (copy_from_user(&dump, useraddr, sizeof(dump)))
2097 return -EFAULT;
2098
2099 memset(&tmp, 0, sizeof(tmp));
2100 tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
2101 ret = ops->get_dump_flag(dev, &tmp);
2102 if (ret)
2103 return ret;
2104
Michal Schmidtc590b5e2013-07-01 17:23:30 +02002105 len = min(tmp.len, dump.len);
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002106 if (!len)
2107 return -EFAULT;
2108
Michal Schmidtc590b5e2013-07-01 17:23:30 +02002109 /* Don't ever let the driver think there's more space available
2110 * than it requested with .get_dump_flag().
2111 */
2112 dump.len = len;
2113
2114 /* Always allocate enough space to hold the whole thing so that the
2115 * driver does not need to check the length and bother with partial
2116 * dumping.
2117 */
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002118 data = vzalloc(tmp.len);
2119 if (!data)
2120 return -ENOMEM;
2121 ret = ops->get_dump_data(dev, &dump, data);
2122 if (ret)
2123 goto out;
2124
Michal Schmidtc590b5e2013-07-01 17:23:30 +02002125 /* There are two sane possibilities:
2126 * 1. The driver's .get_dump_data() does not touch dump.len.
2127 * 2. Or it may set dump.len to how much it really writes, which
2128 * should be tmp.len (or len if it can do a partial dump).
2129 * In any case respond to userspace with the actual length of data
2130 * it's receiving.
2131 */
2132 WARN_ON(dump.len != len && dump.len != tmp.len);
2133 dump.len = len;
2134
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002135 if (copy_to_user(useraddr, &dump, sizeof(dump))) {
2136 ret = -EFAULT;
2137 goto out;
2138 }
2139 useraddr += offsetof(struct ethtool_dump, data);
2140 if (copy_to_user(useraddr, data, len))
2141 ret = -EFAULT;
2142out:
2143 vfree(data);
2144 return ret;
2145}
2146
Richard Cochranc8f3a8c2012-04-03 22:59:17 +00002147static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr)
2148{
2149 int err = 0;
2150 struct ethtool_ts_info info;
2151 const struct ethtool_ops *ops = dev->ethtool_ops;
2152 struct phy_device *phydev = dev->phydev;
2153
2154 memset(&info, 0, sizeof(info));
2155 info.cmd = ETHTOOL_GET_TS_INFO;
2156
2157 if (phydev && phydev->drv && phydev->drv->ts_info) {
Richard Cochranc8f3a8c2012-04-03 22:59:17 +00002158 err = phydev->drv->ts_info(phydev, &info);
Jiri Pirkoc03a14e2013-01-07 09:02:08 +00002159 } else if (ops->get_ts_info) {
Richard Cochranc8f3a8c2012-04-03 22:59:17 +00002160 err = ops->get_ts_info(dev, &info);
Richard Cochranc8f3a8c2012-04-03 22:59:17 +00002161 } else {
2162 info.so_timestamping =
2163 SOF_TIMESTAMPING_RX_SOFTWARE |
2164 SOF_TIMESTAMPING_SOFTWARE;
2165 info.phc_index = -1;
2166 }
2167
2168 if (err)
2169 return err;
2170
2171 if (copy_to_user(useraddr, &info, sizeof(info)))
2172 err = -EFAULT;
2173
2174 return err;
2175}
2176
Ed Swierk2f438362015-01-02 17:27:56 -08002177static int __ethtool_get_module_info(struct net_device *dev,
2178 struct ethtool_modinfo *modinfo)
2179{
2180 const struct ethtool_ops *ops = dev->ethtool_ops;
2181 struct phy_device *phydev = dev->phydev;
2182
2183 if (phydev && phydev->drv && phydev->drv->module_info)
2184 return phydev->drv->module_info(phydev, modinfo);
2185
2186 if (ops->get_module_info)
2187 return ops->get_module_info(dev, modinfo);
2188
2189 return -EOPNOTSUPP;
2190}
2191
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002192static int ethtool_get_module_info(struct net_device *dev,
2193 void __user *useraddr)
2194{
2195 int ret;
2196 struct ethtool_modinfo modinfo;
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002197
2198 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo)))
2199 return -EFAULT;
2200
Ed Swierk2f438362015-01-02 17:27:56 -08002201 ret = __ethtool_get_module_info(dev, &modinfo);
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002202 if (ret)
2203 return ret;
2204
2205 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo)))
2206 return -EFAULT;
2207
2208 return 0;
2209}
2210
Ed Swierk2f438362015-01-02 17:27:56 -08002211static int __ethtool_get_module_eeprom(struct net_device *dev,
2212 struct ethtool_eeprom *ee, u8 *data)
2213{
2214 const struct ethtool_ops *ops = dev->ethtool_ops;
2215 struct phy_device *phydev = dev->phydev;
2216
2217 if (phydev && phydev->drv && phydev->drv->module_eeprom)
2218 return phydev->drv->module_eeprom(phydev, ee, data);
2219
2220 if (ops->get_module_eeprom)
2221 return ops->get_module_eeprom(dev, ee, data);
2222
2223 return -EOPNOTSUPP;
2224}
2225
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002226static int ethtool_get_module_eeprom(struct net_device *dev,
2227 void __user *useraddr)
2228{
2229 int ret;
2230 struct ethtool_modinfo modinfo;
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002231
Ed Swierk2f438362015-01-02 17:27:56 -08002232 ret = __ethtool_get_module_info(dev, &modinfo);
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002233 if (ret)
2234 return ret;
2235
Ed Swierk2f438362015-01-02 17:27:56 -08002236 return ethtool_get_any_eeprom(dev, useraddr,
2237 __ethtool_get_module_eeprom,
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002238 modinfo.eeprom_len);
2239}
2240
Govindarajulu Varadarajanf0db9b02014-09-03 03:17:20 +05302241static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
2242{
2243 switch (tuna->id) {
2244 case ETHTOOL_RX_COPYBREAK:
Eric Dumazet1255a502014-10-05 12:35:21 +03002245 case ETHTOOL_TX_COPYBREAK:
Govindarajulu Varadarajanf0db9b02014-09-03 03:17:20 +05302246 if (tuna->len != sizeof(u32) ||
2247 tuna->type_id != ETHTOOL_TUNABLE_U32)
2248 return -EINVAL;
2249 break;
2250 default:
2251 return -EINVAL;
2252 }
2253
2254 return 0;
2255}
2256
2257static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr)
2258{
2259 int ret;
2260 struct ethtool_tunable tuna;
2261 const struct ethtool_ops *ops = dev->ethtool_ops;
2262 void *data;
2263
2264 if (!ops->get_tunable)
2265 return -EOPNOTSUPP;
2266 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2267 return -EFAULT;
2268 ret = ethtool_tunable_valid(&tuna);
2269 if (ret)
2270 return ret;
2271 data = kmalloc(tuna.len, GFP_USER);
2272 if (!data)
2273 return -ENOMEM;
2274 ret = ops->get_tunable(dev, &tuna, data);
2275 if (ret)
2276 goto out;
2277 useraddr += sizeof(tuna);
2278 ret = -EFAULT;
2279 if (copy_to_user(useraddr, data, tuna.len))
2280 goto out;
2281 ret = 0;
2282
2283out:
2284 kfree(data);
2285 return ret;
2286}
2287
2288static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr)
2289{
2290 int ret;
2291 struct ethtool_tunable tuna;
2292 const struct ethtool_ops *ops = dev->ethtool_ops;
2293 void *data;
2294
2295 if (!ops->set_tunable)
2296 return -EOPNOTSUPP;
2297 if (copy_from_user(&tuna, useraddr, sizeof(tuna)))
2298 return -EFAULT;
2299 ret = ethtool_tunable_valid(&tuna);
2300 if (ret)
2301 return ret;
2302 data = kmalloc(tuna.len, GFP_USER);
2303 if (!data)
2304 return -ENOMEM;
2305 useraddr += sizeof(tuna);
2306 ret = -EFAULT;
2307 if (copy_from_user(data, useraddr, tuna.len))
2308 goto out;
2309 ret = ops->set_tunable(dev, &tuna, data);
2310
2311out:
2312 kfree(data);
2313 return ret;
2314}
2315
Kan Liang421797b2016-02-19 09:24:02 -05002316static int ethtool_get_per_queue_coalesce(struct net_device *dev,
2317 void __user *useraddr,
2318 struct ethtool_per_queue_op *per_queue_opt)
2319{
2320 u32 bit;
2321 int ret;
2322 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2323
2324 if (!dev->ethtool_ops->get_per_queue_coalesce)
2325 return -EOPNOTSUPP;
2326
2327 useraddr += sizeof(*per_queue_opt);
2328
2329 bitmap_from_u32array(queue_mask,
2330 MAX_NUM_QUEUE,
2331 per_queue_opt->queue_mask,
2332 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2333
2334 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2335 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
2336
2337 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce);
2338 if (ret != 0)
2339 return ret;
2340 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
2341 return -EFAULT;
2342 useraddr += sizeof(coalesce);
2343 }
2344
2345 return 0;
2346}
2347
Kan Liangf38d1382016-02-19 09:24:03 -05002348static int ethtool_set_per_queue_coalesce(struct net_device *dev,
2349 void __user *useraddr,
2350 struct ethtool_per_queue_op *per_queue_opt)
2351{
2352 u32 bit;
2353 int i, ret = 0;
2354 int n_queue;
2355 struct ethtool_coalesce *backup = NULL, *tmp = NULL;
2356 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE);
2357
2358 if ((!dev->ethtool_ops->set_per_queue_coalesce) ||
2359 (!dev->ethtool_ops->get_per_queue_coalesce))
2360 return -EOPNOTSUPP;
2361
2362 useraddr += sizeof(*per_queue_opt);
2363
2364 bitmap_from_u32array(queue_mask,
2365 MAX_NUM_QUEUE,
2366 per_queue_opt->queue_mask,
2367 DIV_ROUND_UP(MAX_NUM_QUEUE, 32));
2368 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE);
2369 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL);
2370 if (!backup)
2371 return -ENOMEM;
2372
2373 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) {
2374 struct ethtool_coalesce coalesce;
2375
2376 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp);
2377 if (ret != 0)
2378 goto roll_back;
2379
2380 tmp++;
2381
2382 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) {
2383 ret = -EFAULT;
2384 goto roll_back;
2385 }
2386
2387 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce);
2388 if (ret != 0)
2389 goto roll_back;
2390
2391 useraddr += sizeof(coalesce);
2392 }
2393
2394roll_back:
2395 if (ret != 0) {
2396 tmp = backup;
2397 for_each_set_bit(i, queue_mask, bit) {
2398 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp);
2399 tmp++;
2400 }
2401 }
2402 kfree(backup);
2403
2404 return ret;
2405}
2406
Kan Liangac2c7ad2016-02-19 09:24:01 -05002407static int ethtool_set_per_queue(struct net_device *dev, void __user *useraddr)
2408{
2409 struct ethtool_per_queue_op per_queue_opt;
2410
2411 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt)))
2412 return -EFAULT;
2413
2414 switch (per_queue_opt.sub_command) {
Kan Liang421797b2016-02-19 09:24:02 -05002415 case ETHTOOL_GCOALESCE:
2416 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt);
Kan Liangf38d1382016-02-19 09:24:03 -05002417 case ETHTOOL_SCOALESCE:
2418 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt);
Kan Liangac2c7ad2016-02-19 09:24:01 -05002419 default:
2420 return -EOPNOTSUPP;
2421 };
2422}
2423
Yan Burman600fed52013-06-03 02:03:34 +00002424/* The main entry point in this file. Called from net/core/dev_ioctl.c */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002425
Eric W. Biederman881d9662007-09-17 11:56:21 -07002426int dev_ethtool(struct net *net, struct ifreq *ifr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427{
Eric W. Biederman881d9662007-09-17 11:56:21 -07002428 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429 void __user *useraddr = ifr->ifr_data;
Kan Liangac2c7ad2016-02-19 09:24:01 -05002430 u32 ethcmd, sub_cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002431 int rc;
Bjørn Morkb29d3142013-05-01 23:06:42 +00002432 netdev_features_t old_features;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002433
Linus Torvalds1da177e2005-04-16 15:20:36 -07002434 if (!dev || !netif_device_present(dev))
2435 return -ENODEV;
2436
chavey97f8aef2010-04-07 21:54:42 -07002437 if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002438 return -EFAULT;
2439
Kan Liangac2c7ad2016-02-19 09:24:01 -05002440 if (ethcmd == ETHTOOL_PERQUEUE) {
2441 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd)))
2442 return -EFAULT;
2443 } else {
2444 sub_cmd = ethcmd;
2445 }
Stephen Hemminger75f31232006-09-28 15:13:37 -07002446 /* Allow some commands to be done by anyone */
Kan Liangac2c7ad2016-02-19 09:24:01 -05002447 switch (sub_cmd) {
stephen hemminger0fdc1002010-08-23 10:24:18 +00002448 case ETHTOOL_GSET:
Stephen Hemminger75f31232006-09-28 15:13:37 -07002449 case ETHTOOL_GDRVINFO:
Stephen Hemminger75f31232006-09-28 15:13:37 -07002450 case ETHTOOL_GMSGLVL:
Ben Hutchings2da45db2012-06-12 13:05:41 +00002451 case ETHTOOL_GLINK:
Stephen Hemminger75f31232006-09-28 15:13:37 -07002452 case ETHTOOL_GCOALESCE:
2453 case ETHTOOL_GRINGPARAM:
2454 case ETHTOOL_GPAUSEPARAM:
2455 case ETHTOOL_GRXCSUM:
2456 case ETHTOOL_GTXCSUM:
2457 case ETHTOOL_GSG:
Michał Mirosławf80400a2012-01-22 00:20:40 +00002458 case ETHTOOL_GSSET_INFO:
Stephen Hemminger75f31232006-09-28 15:13:37 -07002459 case ETHTOOL_GSTRINGS:
Ben Hutchings2da45db2012-06-12 13:05:41 +00002460 case ETHTOOL_GSTATS:
Andrew Lunnf3a40942015-12-30 16:28:25 +01002461 case ETHTOOL_GPHYSTATS:
Stephen Hemminger75f31232006-09-28 15:13:37 -07002462 case ETHTOOL_GTSO:
2463 case ETHTOOL_GPERMADDR:
2464 case ETHTOOL_GUFO:
2465 case ETHTOOL_GGSO:
stephen hemminger1cab8192010-02-11 13:48:29 +00002466 case ETHTOOL_GGRO:
Jeff Garzik339bf022007-08-15 16:01:32 -07002467 case ETHTOOL_GFLAGS:
2468 case ETHTOOL_GPFLAGS:
Santwona Behera0853ad62008-07-02 03:47:41 -07002469 case ETHTOOL_GRXFH:
Santwona Behera59089d82009-02-20 00:58:13 -08002470 case ETHTOOL_GRXRINGS:
2471 case ETHTOOL_GRXCLSRLCNT:
2472 case ETHTOOL_GRXCLSRULE:
2473 case ETHTOOL_GRXCLSRLALL:
Ben Hutchings2da45db2012-06-12 13:05:41 +00002474 case ETHTOOL_GRXFHINDIR:
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05302475 case ETHTOOL_GRSSH:
Michał Mirosław5455c692011-02-15 16:59:17 +00002476 case ETHTOOL_GFEATURES:
Ben Hutchings2da45db2012-06-12 13:05:41 +00002477 case ETHTOOL_GCHANNELS:
Richard Cochranc8f3a8c2012-04-03 22:59:17 +00002478 case ETHTOOL_GET_TS_INFO:
Ben Hutchings2da45db2012-06-12 13:05:41 +00002479 case ETHTOOL_GEEE:
Govindarajulu Varadarajanf0db9b02014-09-03 03:17:20 +05302480 case ETHTOOL_GTUNABLE:
Stephen Hemminger75f31232006-09-28 15:13:37 -07002481 break;
2482 default:
Eric W. Biederman5e1fccc2012-11-16 03:03:04 +00002483 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Stephen Hemminger75f31232006-09-28 15:13:37 -07002484 return -EPERM;
2485 }
2486
chavey97f8aef2010-04-07 21:54:42 -07002487 if (dev->ethtool_ops->begin) {
2488 rc = dev->ethtool_ops->begin(dev);
2489 if (rc < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002490 return rc;
chavey97f8aef2010-04-07 21:54:42 -07002491 }
Stephen Hemmingerd8a33ac2005-05-29 14:13:47 -07002492 old_features = dev->features;
2493
Linus Torvalds1da177e2005-04-16 15:20:36 -07002494 switch (ethcmd) {
2495 case ETHTOOL_GSET:
2496 rc = ethtool_get_settings(dev, useraddr);
2497 break;
2498 case ETHTOOL_SSET:
2499 rc = ethtool_set_settings(dev, useraddr);
2500 break;
2501 case ETHTOOL_GDRVINFO:
2502 rc = ethtool_get_drvinfo(dev, useraddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002503 break;
2504 case ETHTOOL_GREGS:
2505 rc = ethtool_get_regs(dev, useraddr);
2506 break;
2507 case ETHTOOL_GWOL:
2508 rc = ethtool_get_wol(dev, useraddr);
2509 break;
2510 case ETHTOOL_SWOL:
2511 rc = ethtool_set_wol(dev, useraddr);
2512 break;
2513 case ETHTOOL_GMSGLVL:
Jeff Garzik13c99b22007-08-15 16:01:56 -07002514 rc = ethtool_get_value(dev, useraddr, ethcmd,
2515 dev->ethtool_ops->get_msglevel);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002516 break;
2517 case ETHTOOL_SMSGLVL:
Jeff Garzik13c99b22007-08-15 16:01:56 -07002518 rc = ethtool_set_value_void(dev, useraddr,
2519 dev->ethtool_ops->set_msglevel);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002520 break;
Yuval Mintz80f12ec2012-06-06 17:13:06 +00002521 case ETHTOOL_GEEE:
2522 rc = ethtool_get_eee(dev, useraddr);
2523 break;
2524 case ETHTOOL_SEEE:
2525 rc = ethtool_set_eee(dev, useraddr);
2526 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002527 case ETHTOOL_NWAY_RST:
2528 rc = ethtool_nway_reset(dev);
2529 break;
2530 case ETHTOOL_GLINK:
Ben Hutchingse596e6e2010-12-09 12:08:35 +00002531 rc = ethtool_get_link(dev, useraddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532 break;
2533 case ETHTOOL_GEEPROM:
2534 rc = ethtool_get_eeprom(dev, useraddr);
2535 break;
2536 case ETHTOOL_SEEPROM:
2537 rc = ethtool_set_eeprom(dev, useraddr);
2538 break;
2539 case ETHTOOL_GCOALESCE:
2540 rc = ethtool_get_coalesce(dev, useraddr);
2541 break;
2542 case ETHTOOL_SCOALESCE:
2543 rc = ethtool_set_coalesce(dev, useraddr);
2544 break;
2545 case ETHTOOL_GRINGPARAM:
2546 rc = ethtool_get_ringparam(dev, useraddr);
2547 break;
2548 case ETHTOOL_SRINGPARAM:
2549 rc = ethtool_set_ringparam(dev, useraddr);
2550 break;
2551 case ETHTOOL_GPAUSEPARAM:
2552 rc = ethtool_get_pauseparam(dev, useraddr);
2553 break;
2554 case ETHTOOL_SPAUSEPARAM:
2555 rc = ethtool_set_pauseparam(dev, useraddr);
2556 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002557 case ETHTOOL_TEST:
2558 rc = ethtool_self_test(dev, useraddr);
2559 break;
2560 case ETHTOOL_GSTRINGS:
2561 rc = ethtool_get_strings(dev, useraddr);
2562 break;
2563 case ETHTOOL_PHYS_ID:
2564 rc = ethtool_phys_id(dev, useraddr);
2565 break;
2566 case ETHTOOL_GSTATS:
2567 rc = ethtool_get_stats(dev, useraddr);
2568 break;
Jon Wetzela6f9a702005-08-20 17:15:54 -07002569 case ETHTOOL_GPERMADDR:
2570 rc = ethtool_get_perm_addr(dev, useraddr);
2571 break;
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07002572 case ETHTOOL_GFLAGS:
Jeff Garzik13c99b22007-08-15 16:01:56 -07002573 rc = ethtool_get_value(dev, useraddr, ethcmd,
Michał Mirosławbc5787c62011-11-15 15:29:55 +00002574 __ethtool_get_flags);
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07002575 break;
2576 case ETHTOOL_SFLAGS:
Michał Mirosławda8ac86c2011-02-15 16:59:18 +00002577 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -07002578 break;
Jeff Garzik339bf022007-08-15 16:01:32 -07002579 case ETHTOOL_GPFLAGS:
Jeff Garzik13c99b22007-08-15 16:01:56 -07002580 rc = ethtool_get_value(dev, useraddr, ethcmd,
2581 dev->ethtool_ops->get_priv_flags);
Jeff Garzik339bf022007-08-15 16:01:32 -07002582 break;
2583 case ETHTOOL_SPFLAGS:
Jeff Garzik13c99b22007-08-15 16:01:56 -07002584 rc = ethtool_set_value(dev, useraddr,
2585 dev->ethtool_ops->set_priv_flags);
Jeff Garzik339bf022007-08-15 16:01:32 -07002586 break;
Santwona Behera0853ad62008-07-02 03:47:41 -07002587 case ETHTOOL_GRXFH:
Santwona Behera59089d82009-02-20 00:58:13 -08002588 case ETHTOOL_GRXRINGS:
2589 case ETHTOOL_GRXCLSRLCNT:
2590 case ETHTOOL_GRXCLSRULE:
2591 case ETHTOOL_GRXCLSRLALL:
Ben Hutchingsbf988432010-06-28 08:45:58 +00002592 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
Santwona Behera0853ad62008-07-02 03:47:41 -07002593 break;
2594 case ETHTOOL_SRXFH:
Santwona Behera59089d82009-02-20 00:58:13 -08002595 case ETHTOOL_SRXCLSRLDEL:
2596 case ETHTOOL_SRXCLSRLINS:
Ben Hutchingsbf988432010-06-28 08:45:58 +00002597 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
Santwona Behera0853ad62008-07-02 03:47:41 -07002598 break;
Ajit Khaparde05c6a8d2009-09-02 17:02:55 +00002599 case ETHTOOL_FLASHDEV:
2600 rc = ethtool_flash_device(dev, useraddr);
2601 break;
Ben Hutchingsd73d3a82009-10-05 10:59:58 +00002602 case ETHTOOL_RESET:
2603 rc = ethtool_reset(dev, useraddr);
2604 break;
Jeff Garzik723b2f52010-03-03 22:51:50 +00002605 case ETHTOOL_GSSET_INFO:
2606 rc = ethtool_get_sset_info(dev, useraddr);
2607 break;
Ben Hutchingsa5b6ee22010-06-30 05:05:23 +00002608 case ETHTOOL_GRXFHINDIR:
2609 rc = ethtool_get_rxfh_indir(dev, useraddr);
2610 break;
2611 case ETHTOOL_SRXFHINDIR:
2612 rc = ethtool_set_rxfh_indir(dev, useraddr);
2613 break;
Venkata Duvvuru3de0b592014-04-21 15:37:59 +05302614 case ETHTOOL_GRSSH:
2615 rc = ethtool_get_rxfh(dev, useraddr);
2616 break;
2617 case ETHTOOL_SRSSH:
2618 rc = ethtool_set_rxfh(dev, useraddr);
2619 break;
Michał Mirosław5455c692011-02-15 16:59:17 +00002620 case ETHTOOL_GFEATURES:
2621 rc = ethtool_get_features(dev, useraddr);
2622 break;
2623 case ETHTOOL_SFEATURES:
2624 rc = ethtool_set_features(dev, useraddr);
2625 break;
Michał Mirosław0a417702011-02-15 16:59:17 +00002626 case ETHTOOL_GTXCSUM:
Michał Mirosławe83d3602011-02-15 16:59:18 +00002627 case ETHTOOL_GRXCSUM:
Michał Mirosław0a417702011-02-15 16:59:17 +00002628 case ETHTOOL_GSG:
2629 case ETHTOOL_GTSO:
2630 case ETHTOOL_GUFO:
2631 case ETHTOOL_GGSO:
2632 case ETHTOOL_GGRO:
2633 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2634 break;
2635 case ETHTOOL_STXCSUM:
Michał Mirosławe83d3602011-02-15 16:59:18 +00002636 case ETHTOOL_SRXCSUM:
Michał Mirosław0a417702011-02-15 16:59:17 +00002637 case ETHTOOL_SSG:
2638 case ETHTOOL_STSO:
2639 case ETHTOOL_SUFO:
2640 case ETHTOOL_SGSO:
2641 case ETHTOOL_SGRO:
2642 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2643 break;
amit salecha8b5933c2011-04-07 01:58:42 +00002644 case ETHTOOL_GCHANNELS:
2645 rc = ethtool_get_channels(dev, useraddr);
2646 break;
2647 case ETHTOOL_SCHANNELS:
2648 rc = ethtool_set_channels(dev, useraddr);
2649 break;
Anirban Chakraborty29dd54b2011-05-12 12:48:32 +00002650 case ETHTOOL_SET_DUMP:
2651 rc = ethtool_set_dump(dev, useraddr);
2652 break;
2653 case ETHTOOL_GET_DUMP_FLAG:
2654 rc = ethtool_get_dump_flag(dev, useraddr);
2655 break;
2656 case ETHTOOL_GET_DUMP_DATA:
2657 rc = ethtool_get_dump_data(dev, useraddr);
2658 break;
Richard Cochranc8f3a8c2012-04-03 22:59:17 +00002659 case ETHTOOL_GET_TS_INFO:
2660 rc = ethtool_get_ts_info(dev, useraddr);
2661 break;
Stuart Hodgson41c3cb62012-04-19 09:44:42 +01002662 case ETHTOOL_GMODULEINFO:
2663 rc = ethtool_get_module_info(dev, useraddr);
2664 break;
2665 case ETHTOOL_GMODULEEEPROM:
2666 rc = ethtool_get_module_eeprom(dev, useraddr);
2667 break;
Govindarajulu Varadarajanf0db9b02014-09-03 03:17:20 +05302668 case ETHTOOL_GTUNABLE:
2669 rc = ethtool_get_tunable(dev, useraddr);
2670 break;
2671 case ETHTOOL_STUNABLE:
2672 rc = ethtool_set_tunable(dev, useraddr);
2673 break;
Andrew Lunnf3a40942015-12-30 16:28:25 +01002674 case ETHTOOL_GPHYSTATS:
2675 rc = ethtool_get_phy_stats(dev, useraddr);
2676 break;
Kan Liangac2c7ad2016-02-19 09:24:01 -05002677 case ETHTOOL_PERQUEUE:
2678 rc = ethtool_set_per_queue(dev, useraddr);
2679 break;
David Decotigny3f1ac7a2016-02-24 10:57:59 -08002680 case ETHTOOL_GLINKSETTINGS:
2681 rc = ethtool_get_link_ksettings(dev, useraddr);
2682 break;
2683 case ETHTOOL_SLINKSETTINGS:
2684 rc = ethtool_set_link_ksettings(dev, useraddr);
2685 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002686 default:
Matthew Wilcox61a44b92007-07-31 14:00:02 -07002687 rc = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002688 }
YOSHIFUJI Hideaki4ec93ed2007-02-09 23:24:36 +09002689
Stephen Hemmingere71a4782007-04-10 20:10:33 -07002690 if (dev->ethtool_ops->complete)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002691 dev->ethtool_ops->complete(dev);
Stephen Hemmingerd8a33ac2005-05-29 14:13:47 -07002692
2693 if (old_features != dev->features)
2694 netdev_features_change(dev);
2695
Linus Torvalds1da177e2005-04-16 15:20:36 -07002696 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002697}