blob: af4dfbadf2a09ea496653990ae8e1da823a059e1 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * net-sysfs.c - network device class and attributes
3 *
4 * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org>
YOSHIFUJI Hideaki4ec93ed2007-02-09 23:24:36 +09005 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
Randy Dunlap4fc268d2006-01-11 12:17:47 -080012#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/kernel.h>
14#include <linux/netdevice.h>
15#include <linux/if_arp.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090016#include <linux/slab.h>
Eric W. Biederman608b4b92010-05-04 17:36:45 -070017#include <linux/nsproxy.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <net/sock.h>
Eric W. Biederman608b4b92010-05-04 17:36:45 -070019#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/rtnetlink.h>
21#include <linux/wireless.h>
Tom Herbertfec5e652010-04-16 16:01:27 -070022#include <linux/vmalloc.h>
Johannes Berg8f1546c2009-09-28 15:26:43 +020023#include <net/wext.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
Pavel Emelyanov342709e2007-10-23 21:14:45 -070025#include "net-sysfs.h"
26
Eric W. Biederman8b41d182007-09-26 22:02:53 -070027#ifdef CONFIG_SYSFS
Linus Torvalds1da177e2005-04-16 15:20:36 -070028static const char fmt_hex[] = "%#x\n";
David S. Millerd1102b52005-05-29 20:28:25 -070029static const char fmt_long_hex[] = "%#lx\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -070030static const char fmt_dec[] = "%d\n";
31static const char fmt_ulong[] = "%lu\n";
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +000032static const char fmt_u64[] = "%llu\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
YOSHIFUJI Hideaki4ec93ed2007-02-09 23:24:36 +090034static inline int dev_isalive(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070035{
Stephen Hemmingerfe9925b2006-05-06 17:56:03 -070036 return dev->reg_state <= NETREG_REGISTERED;
Linus Torvalds1da177e2005-04-16 15:20:36 -070037}
38
39/* use same locking rules as GIF* ioctl's */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -070040static ssize_t netdev_show(const struct device *dev,
41 struct device_attribute *attr, char *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 ssize_t (*format)(const struct net_device *, char *))
43{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -070044 struct net_device *net = to_net_dev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 ssize_t ret = -EINVAL;
46
47 read_lock(&dev_base_lock);
48 if (dev_isalive(net))
49 ret = (*format)(net, buf);
50 read_unlock(&dev_base_lock);
51
52 return ret;
53}
54
55/* generate a show function for simple field */
56#define NETDEVICE_SHOW(field, format_string) \
57static ssize_t format_##field(const struct net_device *net, char *buf) \
58{ \
59 return sprintf(buf, format_string, net->field); \
60} \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -070061static ssize_t show_##field(struct device *dev, \
62 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -070063{ \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -070064 return netdev_show(dev, attr, buf, format_##field); \
Linus Torvalds1da177e2005-04-16 15:20:36 -070065}
66
67
68/* use same locking and permission rules as SIF* ioctl's */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -070069static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 const char *buf, size_t len,
71 int (*set)(struct net_device *, unsigned long))
72{
73 struct net_device *net = to_net_dev(dev);
74 char *endp;
75 unsigned long new;
76 int ret = -EINVAL;
77
78 if (!capable(CAP_NET_ADMIN))
79 return -EPERM;
80
81 new = simple_strtoul(buf, &endp, 0);
82 if (endp == buf)
83 goto err;
84
Stephen Hemminger5a5990d2009-02-26 06:49:24 +000085 if (!rtnl_trylock())
Eric W. Biederman336ca572009-05-13 16:57:25 +000086 return restart_syscall();
Stephen Hemminger5a5990d2009-02-26 06:49:24 +000087
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 if (dev_isalive(net)) {
89 if ((ret = (*set)(net, new)) == 0)
90 ret = len;
91 }
92 rtnl_unlock();
93 err:
94 return ret;
95}
96
David Woodhouse9d296722008-04-20 16:07:43 -070097NETDEVICE_SHOW(dev_id, fmt_hex);
Stefan Assmannc1f79422010-07-22 02:50:21 +000098NETDEVICE_SHOW(addr_assign_type, fmt_dec);
Kay Sieversfd586ba2005-12-19 01:42:56 +010099NETDEVICE_SHOW(addr_len, fmt_dec);
100NETDEVICE_SHOW(iflink, fmt_dec);
101NETDEVICE_SHOW(ifindex, fmt_dec);
102NETDEVICE_SHOW(features, fmt_long_hex);
103NETDEVICE_SHOW(type, fmt_dec);
Stefan Rompfb00055a2006-03-20 17:09:11 -0800104NETDEVICE_SHOW(link_mode, fmt_dec);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
106/* use same locking rules as GIFHWADDR ioctl's */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700107static ssize_t show_address(struct device *dev, struct device_attribute *attr,
108 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109{
110 struct net_device *net = to_net_dev(dev);
111 ssize_t ret = -EINVAL;
112
113 read_lock(&dev_base_lock);
114 if (dev_isalive(net))
Michael Chan7ffc49a2007-12-24 21:28:09 -0800115 ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 read_unlock(&dev_base_lock);
117 return ret;
118}
119
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700120static ssize_t show_broadcast(struct device *dev,
121 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122{
123 struct net_device *net = to_net_dev(dev);
124 if (dev_isalive(net))
Michael Chan7ffc49a2007-12-24 21:28:09 -0800125 return sysfs_format_mac(buf, net->broadcast, net->addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 return -EINVAL;
127}
128
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700129static ssize_t show_carrier(struct device *dev,
130 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131{
132 struct net_device *netdev = to_net_dev(dev);
133 if (netif_running(netdev)) {
134 return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
135 }
136 return -EINVAL;
137}
138
Andy Gospodarekd519e172009-10-02 09:26:12 +0000139static ssize_t show_speed(struct device *dev,
140 struct device_attribute *attr, char *buf)
141{
142 struct net_device *netdev = to_net_dev(dev);
143 int ret = -EINVAL;
144
145 if (!rtnl_trylock())
146 return restart_syscall();
147
Eric Dumazetac5e3af2009-10-26 01:23:33 +0000148 if (netif_running(netdev) &&
149 netdev->ethtool_ops &&
150 netdev->ethtool_ops->get_settings) {
Andy Gospodarekd519e172009-10-02 09:26:12 +0000151 struct ethtool_cmd cmd = { ETHTOOL_GSET };
152
153 if (!netdev->ethtool_ops->get_settings(netdev, &cmd))
154 ret = sprintf(buf, fmt_dec, ethtool_cmd_speed(&cmd));
155 }
156 rtnl_unlock();
157 return ret;
158}
159
160static ssize_t show_duplex(struct device *dev,
161 struct device_attribute *attr, char *buf)
162{
163 struct net_device *netdev = to_net_dev(dev);
164 int ret = -EINVAL;
165
166 if (!rtnl_trylock())
167 return restart_syscall();
168
Eric Dumazetac5e3af2009-10-26 01:23:33 +0000169 if (netif_running(netdev) &&
170 netdev->ethtool_ops &&
171 netdev->ethtool_ops->get_settings) {
Andy Gospodarekd519e172009-10-02 09:26:12 +0000172 struct ethtool_cmd cmd = { ETHTOOL_GSET };
173
174 if (!netdev->ethtool_ops->get_settings(netdev, &cmd))
175 ret = sprintf(buf, "%s\n", cmd.duplex ? "full" : "half");
176 }
177 rtnl_unlock();
178 return ret;
179}
180
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700181static ssize_t show_dormant(struct device *dev,
182 struct device_attribute *attr, char *buf)
Stefan Rompfb00055a2006-03-20 17:09:11 -0800183{
184 struct net_device *netdev = to_net_dev(dev);
185
186 if (netif_running(netdev))
187 return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
188
189 return -EINVAL;
190}
191
Jan Engelhardt36cbd3d2009-08-05 10:42:58 -0700192static const char *const operstates[] = {
Stefan Rompfb00055a2006-03-20 17:09:11 -0800193 "unknown",
194 "notpresent", /* currently unused */
195 "down",
196 "lowerlayerdown",
197 "testing", /* currently unused */
198 "dormant",
199 "up"
200};
201
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700202static ssize_t show_operstate(struct device *dev,
203 struct device_attribute *attr, char *buf)
Stefan Rompfb00055a2006-03-20 17:09:11 -0800204{
205 const struct net_device *netdev = to_net_dev(dev);
206 unsigned char operstate;
207
208 read_lock(&dev_base_lock);
209 operstate = netdev->operstate;
210 if (!netif_running(netdev))
211 operstate = IF_OPER_DOWN;
212 read_unlock(&dev_base_lock);
213
Adrian Bunke3a5cd92006-04-05 22:19:47 -0700214 if (operstate >= ARRAY_SIZE(operstates))
Stefan Rompfb00055a2006-03-20 17:09:11 -0800215 return -EINVAL; /* should not happen */
216
217 return sprintf(buf, "%s\n", operstates[operstate]);
218}
219
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220/* read-write attributes */
221NETDEVICE_SHOW(mtu, fmt_dec);
222
223static int change_mtu(struct net_device *net, unsigned long new_mtu)
224{
225 return dev_set_mtu(net, (int) new_mtu);
226}
227
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700228static ssize_t store_mtu(struct device *dev, struct device_attribute *attr,
229 const char *buf, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700231 return netdev_store(dev, attr, buf, len, change_mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232}
233
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234NETDEVICE_SHOW(flags, fmt_hex);
235
236static int change_flags(struct net_device *net, unsigned long new_flags)
237{
238 return dev_change_flags(net, (unsigned) new_flags);
239}
240
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700241static ssize_t store_flags(struct device *dev, struct device_attribute *attr,
242 const char *buf, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700244 return netdev_store(dev, attr, buf, len, change_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245}
246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247NETDEVICE_SHOW(tx_queue_len, fmt_ulong);
248
249static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
250{
251 net->tx_queue_len = new_len;
252 return 0;
253}
254
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700255static ssize_t store_tx_queue_len(struct device *dev,
256 struct device_attribute *attr,
257 const char *buf, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700259 return netdev_store(dev, attr, buf, len, change_tx_queue_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260}
261
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700262static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr,
263 const char *buf, size_t len)
264{
265 struct net_device *netdev = to_net_dev(dev);
266 size_t count = len;
267 ssize_t ret;
268
269 if (!capable(CAP_NET_ADMIN))
270 return -EPERM;
271
272 /* ignore trailing newline */
273 if (len > 0 && buf[len - 1] == '\n')
274 --count;
275
Eric W. Biederman336ca572009-05-13 16:57:25 +0000276 if (!rtnl_trylock())
277 return restart_syscall();
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700278 ret = dev_set_alias(netdev, buf, count);
279 rtnl_unlock();
280
281 return ret < 0 ? ret : len;
282}
283
284static ssize_t show_ifalias(struct device *dev,
285 struct device_attribute *attr, char *buf)
286{
287 const struct net_device *netdev = to_net_dev(dev);
288 ssize_t ret = 0;
289
Eric W. Biederman336ca572009-05-13 16:57:25 +0000290 if (!rtnl_trylock())
291 return restart_syscall();
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700292 if (netdev->ifalias)
293 ret = sprintf(buf, "%s\n", netdev->ifalias);
294 rtnl_unlock();
295 return ret;
296}
297
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700298static struct device_attribute net_class_attributes[] = {
Stefan Assmannc1f79422010-07-22 02:50:21 +0000299 __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100300 __ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
David Woodhouse9d296722008-04-20 16:07:43 -0700301 __ATTR(dev_id, S_IRUGO, show_dev_id, NULL),
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700302 __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100303 __ATTR(iflink, S_IRUGO, show_iflink, NULL),
304 __ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
305 __ATTR(features, S_IRUGO, show_features, NULL),
306 __ATTR(type, S_IRUGO, show_type, NULL),
Stefan Rompfb00055a2006-03-20 17:09:11 -0800307 __ATTR(link_mode, S_IRUGO, show_link_mode, NULL),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100308 __ATTR(address, S_IRUGO, show_address, NULL),
309 __ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
310 __ATTR(carrier, S_IRUGO, show_carrier, NULL),
Andy Gospodarekd519e172009-10-02 09:26:12 +0000311 __ATTR(speed, S_IRUGO, show_speed, NULL),
312 __ATTR(duplex, S_IRUGO, show_duplex, NULL),
Stefan Rompfb00055a2006-03-20 17:09:11 -0800313 __ATTR(dormant, S_IRUGO, show_dormant, NULL),
314 __ATTR(operstate, S_IRUGO, show_operstate, NULL),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100315 __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu),
316 __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags),
317 __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
318 store_tx_queue_len),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100319 {}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320};
321
322/* Show a given an attribute in the statistics group */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700323static ssize_t netstat_show(const struct device *d,
324 struct device_attribute *attr, char *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 unsigned long offset)
326{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700327 struct net_device *dev = to_net_dev(d);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 ssize_t ret = -EINVAL;
329
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000330 WARN_ON(offset > sizeof(struct rtnl_link_stats64) ||
331 offset % sizeof(u64) != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332
333 read_lock(&dev_base_lock);
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700334 if (dev_isalive(dev)) {
Eric Dumazet28172732010-07-07 14:58:56 -0700335 struct rtnl_link_stats64 temp;
336 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
337
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000338 ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset));
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700339 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 read_unlock(&dev_base_lock);
341 return ret;
342}
343
344/* generate a read-only statistics attribute */
345#define NETSTAT_ENTRY(name) \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700346static ssize_t show_##name(struct device *d, \
347 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348{ \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700349 return netstat_show(d, attr, buf, \
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000350 offsetof(struct rtnl_link_stats64, name)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351} \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700352static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
354NETSTAT_ENTRY(rx_packets);
355NETSTAT_ENTRY(tx_packets);
356NETSTAT_ENTRY(rx_bytes);
357NETSTAT_ENTRY(tx_bytes);
358NETSTAT_ENTRY(rx_errors);
359NETSTAT_ENTRY(tx_errors);
360NETSTAT_ENTRY(rx_dropped);
361NETSTAT_ENTRY(tx_dropped);
362NETSTAT_ENTRY(multicast);
363NETSTAT_ENTRY(collisions);
364NETSTAT_ENTRY(rx_length_errors);
365NETSTAT_ENTRY(rx_over_errors);
366NETSTAT_ENTRY(rx_crc_errors);
367NETSTAT_ENTRY(rx_frame_errors);
368NETSTAT_ENTRY(rx_fifo_errors);
369NETSTAT_ENTRY(rx_missed_errors);
370NETSTAT_ENTRY(tx_aborted_errors);
371NETSTAT_ENTRY(tx_carrier_errors);
372NETSTAT_ENTRY(tx_fifo_errors);
373NETSTAT_ENTRY(tx_heartbeat_errors);
374NETSTAT_ENTRY(tx_window_errors);
375NETSTAT_ENTRY(rx_compressed);
376NETSTAT_ENTRY(tx_compressed);
377
378static struct attribute *netstat_attrs[] = {
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700379 &dev_attr_rx_packets.attr,
380 &dev_attr_tx_packets.attr,
381 &dev_attr_rx_bytes.attr,
382 &dev_attr_tx_bytes.attr,
383 &dev_attr_rx_errors.attr,
384 &dev_attr_tx_errors.attr,
385 &dev_attr_rx_dropped.attr,
386 &dev_attr_tx_dropped.attr,
387 &dev_attr_multicast.attr,
388 &dev_attr_collisions.attr,
389 &dev_attr_rx_length_errors.attr,
390 &dev_attr_rx_over_errors.attr,
391 &dev_attr_rx_crc_errors.attr,
392 &dev_attr_rx_frame_errors.attr,
393 &dev_attr_rx_fifo_errors.attr,
394 &dev_attr_rx_missed_errors.attr,
395 &dev_attr_tx_aborted_errors.attr,
396 &dev_attr_tx_carrier_errors.attr,
397 &dev_attr_tx_fifo_errors.attr,
398 &dev_attr_tx_heartbeat_errors.attr,
399 &dev_attr_tx_window_errors.attr,
400 &dev_attr_rx_compressed.attr,
401 &dev_attr_tx_compressed.attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 NULL
403};
404
405
406static struct attribute_group netstat_group = {
407 .name = "statistics",
408 .attrs = netstat_attrs,
409};
410
Johannes Berg22bb1be2008-07-10 11:16:47 +0200411#ifdef CONFIG_WIRELESS_EXT_SYSFS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412/* helper function that does all the locking etc for wireless stats */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700413static ssize_t wireless_show(struct device *d, char *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 ssize_t (*format)(const struct iw_statistics *,
415 char *))
416{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700417 struct net_device *dev = to_net_dev(d);
Johannes Berg8f1546c2009-09-28 15:26:43 +0200418 const struct iw_statistics *iw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 ssize_t ret = -EINVAL;
YOSHIFUJI Hideaki4ec93ed2007-02-09 23:24:36 +0900420
Eric W. Biedermanb8afe642010-02-19 13:23:47 +0000421 if (!rtnl_trylock())
422 return restart_syscall();
Andrey Borzenkov6dd214b2006-01-09 20:51:28 -0800423 if (dev_isalive(dev)) {
Johannes Berg8f1546c2009-09-28 15:26:43 +0200424 iw = get_wireless_stats(dev);
425 if (iw)
Andrey Borzenkov6dd214b2006-01-09 20:51:28 -0800426 ret = (*format)(iw, buf);
427 }
Johannes Berga160ee62009-10-05 02:22:23 -0700428 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
430 return ret;
431}
432
433/* show function template for wireless fields */
434#define WIRELESS_SHOW(name, field, format_string) \
435static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \
436{ \
437 return sprintf(buf, format_string, iw->field); \
438} \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700439static ssize_t show_iw_##name(struct device *d, \
440 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441{ \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700442 return wireless_show(d, buf, format_iw_##name); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443} \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700444static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
446WIRELESS_SHOW(status, status, fmt_hex);
447WIRELESS_SHOW(link, qual.qual, fmt_dec);
448WIRELESS_SHOW(level, qual.level, fmt_dec);
449WIRELESS_SHOW(noise, qual.noise, fmt_dec);
450WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
451WIRELESS_SHOW(crypt, discard.code, fmt_dec);
452WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
453WIRELESS_SHOW(misc, discard.misc, fmt_dec);
454WIRELESS_SHOW(retries, discard.retries, fmt_dec);
455WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
456
457static struct attribute *wireless_attrs[] = {
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700458 &dev_attr_status.attr,
459 &dev_attr_link.attr,
460 &dev_attr_level.attr,
461 &dev_attr_noise.attr,
462 &dev_attr_nwid.attr,
463 &dev_attr_crypt.attr,
464 &dev_attr_fragment.attr,
465 &dev_attr_retries.attr,
466 &dev_attr_misc.attr,
467 &dev_attr_beacon.attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 NULL
469};
470
471static struct attribute_group wireless_group = {
472 .name = "wireless",
473 .attrs = wireless_attrs,
474};
475#endif
Eric W. Biedermand6523dd2010-05-16 21:59:45 -0700476#endif /* CONFIG_SYSFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Stephen Rothwell30bde1f2010-03-29 01:00:44 -0700478#ifdef CONFIG_RPS
Tom Herbert0a9627f2010-03-16 08:03:29 +0000479/*
480 * RX queue sysfs structures and functions.
481 */
482struct rx_queue_attribute {
483 struct attribute attr;
484 ssize_t (*show)(struct netdev_rx_queue *queue,
485 struct rx_queue_attribute *attr, char *buf);
486 ssize_t (*store)(struct netdev_rx_queue *queue,
487 struct rx_queue_attribute *attr, const char *buf, size_t len);
488};
489#define to_rx_queue_attr(_attr) container_of(_attr, \
490 struct rx_queue_attribute, attr)
491
492#define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj)
493
494static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr,
495 char *buf)
496{
497 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
498 struct netdev_rx_queue *queue = to_rx_queue(kobj);
499
500 if (!attribute->show)
501 return -EIO;
502
503 return attribute->show(queue, attribute, buf);
504}
505
506static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr,
507 const char *buf, size_t count)
508{
509 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
510 struct netdev_rx_queue *queue = to_rx_queue(kobj);
511
512 if (!attribute->store)
513 return -EIO;
514
515 return attribute->store(queue, attribute, buf, count);
516}
517
518static struct sysfs_ops rx_queue_sysfs_ops = {
519 .show = rx_queue_attr_show,
520 .store = rx_queue_attr_store,
521};
522
523static ssize_t show_rps_map(struct netdev_rx_queue *queue,
524 struct rx_queue_attribute *attribute, char *buf)
525{
526 struct rps_map *map;
527 cpumask_var_t mask;
528 size_t len = 0;
529 int i;
530
531 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
532 return -ENOMEM;
533
534 rcu_read_lock();
535 map = rcu_dereference(queue->rps_map);
536 if (map)
537 for (i = 0; i < map->len; i++)
538 cpumask_set_cpu(map->cpus[i], mask);
539
540 len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
541 if (PAGE_SIZE - len < 3) {
542 rcu_read_unlock();
543 free_cpumask_var(mask);
544 return -EINVAL;
545 }
546 rcu_read_unlock();
547
548 free_cpumask_var(mask);
549 len += sprintf(buf + len, "\n");
550 return len;
551}
552
553static void rps_map_release(struct rcu_head *rcu)
554{
555 struct rps_map *map = container_of(rcu, struct rps_map, rcu);
556
557 kfree(map);
558}
559
Eric Dumazetf5acb902010-04-19 14:40:57 -0700560static ssize_t store_rps_map(struct netdev_rx_queue *queue,
Tom Herbert0a9627f2010-03-16 08:03:29 +0000561 struct rx_queue_attribute *attribute,
562 const char *buf, size_t len)
563{
564 struct rps_map *old_map, *map;
565 cpumask_var_t mask;
566 int err, cpu, i;
567 static DEFINE_SPINLOCK(rps_map_lock);
568
569 if (!capable(CAP_NET_ADMIN))
570 return -EPERM;
571
572 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
573 return -ENOMEM;
574
575 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
576 if (err) {
577 free_cpumask_var(mask);
578 return err;
579 }
580
581 map = kzalloc(max_t(unsigned,
582 RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES),
583 GFP_KERNEL);
584 if (!map) {
585 free_cpumask_var(mask);
586 return -ENOMEM;
587 }
588
589 i = 0;
590 for_each_cpu_and(cpu, mask, cpu_online_mask)
591 map->cpus[i++] = cpu;
592
593 if (i)
594 map->len = i;
595 else {
596 kfree(map);
597 map = NULL;
598 }
599
600 spin_lock(&rps_map_lock);
601 old_map = queue->rps_map;
602 rcu_assign_pointer(queue->rps_map, map);
603 spin_unlock(&rps_map_lock);
604
605 if (old_map)
606 call_rcu(&old_map->rcu, rps_map_release);
607
608 free_cpumask_var(mask);
609 return len;
610}
611
Tom Herbertfec5e652010-04-16 16:01:27 -0700612static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
613 struct rx_queue_attribute *attr,
614 char *buf)
615{
616 struct rps_dev_flow_table *flow_table;
617 unsigned int val = 0;
618
619 rcu_read_lock();
620 flow_table = rcu_dereference(queue->rps_flow_table);
621 if (flow_table)
622 val = flow_table->mask + 1;
623 rcu_read_unlock();
624
625 return sprintf(buf, "%u\n", val);
626}
627
628static void rps_dev_flow_table_release_work(struct work_struct *work)
629{
630 struct rps_dev_flow_table *table = container_of(work,
631 struct rps_dev_flow_table, free_work);
632
633 vfree(table);
634}
635
636static void rps_dev_flow_table_release(struct rcu_head *rcu)
637{
638 struct rps_dev_flow_table *table = container_of(rcu,
639 struct rps_dev_flow_table, rcu);
640
641 INIT_WORK(&table->free_work, rps_dev_flow_table_release_work);
642 schedule_work(&table->free_work);
643}
644
Eric Dumazetf5acb902010-04-19 14:40:57 -0700645static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
Tom Herbertfec5e652010-04-16 16:01:27 -0700646 struct rx_queue_attribute *attr,
647 const char *buf, size_t len)
648{
649 unsigned int count;
650 char *endp;
651 struct rps_dev_flow_table *table, *old_table;
652 static DEFINE_SPINLOCK(rps_dev_flow_lock);
653
654 if (!capable(CAP_NET_ADMIN))
655 return -EPERM;
656
657 count = simple_strtoul(buf, &endp, 0);
658 if (endp == buf)
659 return -EINVAL;
660
661 if (count) {
662 int i;
663
664 if (count > 1<<30) {
665 /* Enforce a limit to prevent overflow */
666 return -EINVAL;
667 }
668 count = roundup_pow_of_two(count);
669 table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count));
670 if (!table)
671 return -ENOMEM;
672
673 table->mask = count - 1;
674 for (i = 0; i < count; i++)
675 table->flows[i].cpu = RPS_NO_CPU;
676 } else
677 table = NULL;
678
679 spin_lock(&rps_dev_flow_lock);
680 old_table = queue->rps_flow_table;
681 rcu_assign_pointer(queue->rps_flow_table, table);
682 spin_unlock(&rps_dev_flow_lock);
683
684 if (old_table)
685 call_rcu(&old_table->rcu, rps_dev_flow_table_release);
686
687 return len;
688}
689
Tom Herbert0a9627f2010-03-16 08:03:29 +0000690static struct rx_queue_attribute rps_cpus_attribute =
691 __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map);
692
Tom Herbertfec5e652010-04-16 16:01:27 -0700693
694static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute =
695 __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR,
696 show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt);
697
Tom Herbert0a9627f2010-03-16 08:03:29 +0000698static struct attribute *rx_queue_default_attrs[] = {
699 &rps_cpus_attribute.attr,
Tom Herbertfec5e652010-04-16 16:01:27 -0700700 &rps_dev_flow_table_cnt_attribute.attr,
Tom Herbert0a9627f2010-03-16 08:03:29 +0000701 NULL
702};
703
704static void rx_queue_release(struct kobject *kobj)
705{
706 struct netdev_rx_queue *queue = to_rx_queue(kobj);
Tom Herbert0a9627f2010-03-16 08:03:29 +0000707 struct netdev_rx_queue *first = queue->first;
708
Tom Herbertfec5e652010-04-16 16:01:27 -0700709 if (queue->rps_map)
710 call_rcu(&queue->rps_map->rcu, rps_map_release);
711
712 if (queue->rps_flow_table)
713 call_rcu(&queue->rps_flow_table->rcu,
714 rps_dev_flow_table_release);
Tom Herbert0a9627f2010-03-16 08:03:29 +0000715
716 if (atomic_dec_and_test(&first->count))
717 kfree(first);
718}
719
720static struct kobj_type rx_queue_ktype = {
721 .sysfs_ops = &rx_queue_sysfs_ops,
722 .release = rx_queue_release,
723 .default_attrs = rx_queue_default_attrs,
724};
725
726static int rx_queue_add_kobject(struct net_device *net, int index)
727{
728 struct netdev_rx_queue *queue = net->_rx + index;
729 struct kobject *kobj = &queue->kobj;
730 int error = 0;
731
732 kobj->kset = net->queues_kset;
733 error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
734 "rx-%u", index);
735 if (error) {
736 kobject_put(kobj);
737 return error;
738 }
739
740 kobject_uevent(kobj, KOBJ_ADD);
741
742 return error;
743}
744
745static int rx_queue_register_kobjects(struct net_device *net)
746{
747 int i;
748 int error = 0;
749
750 net->queues_kset = kset_create_and_add("queues",
751 NULL, &net->dev.kobj);
752 if (!net->queues_kset)
753 return -ENOMEM;
754 for (i = 0; i < net->num_rx_queues; i++) {
755 error = rx_queue_add_kobject(net, i);
756 if (error)
757 break;
758 }
759
760 if (error)
761 while (--i >= 0)
762 kobject_put(&net->_rx[i].kobj);
763
764 return error;
765}
766
767static void rx_queue_remove_kobjects(struct net_device *net)
768{
769 int i;
770
771 for (i = 0; i < net->num_rx_queues; i++)
772 kobject_put(&net->_rx[i].kobj);
773 kset_unregister(net->queues_kset);
774}
Stephen Rothwell30bde1f2010-03-29 01:00:44 -0700775#endif /* CONFIG_RPS */
Eric W. Biederman608b4b92010-05-04 17:36:45 -0700776
777static const void *net_current_ns(void)
778{
779 return current->nsproxy->net_ns;
780}
781
782static const void *net_initial_ns(void)
783{
784 return &init_net;
785}
786
787static const void *net_netlink_ns(struct sock *sk)
788{
789 return sock_net(sk);
790}
791
792static struct kobj_ns_type_operations net_ns_type_operations = {
793 .type = KOBJ_NS_TYPE_NET,
794 .current_ns = net_current_ns,
795 .netlink_ns = net_netlink_ns,
796 .initial_ns = net_initial_ns,
797};
798
799static void net_kobj_ns_exit(struct net *net)
800{
801 kobj_ns_exit(KOBJ_NS_TYPE_NET, net);
802}
803
Eric W. Biedermand6523dd2010-05-16 21:59:45 -0700804static struct pernet_operations kobj_net_ops = {
Eric W. Biederman608b4b92010-05-04 17:36:45 -0700805 .exit = net_kobj_ns_exit,
806};
807
Eric W. Biederman8b41d182007-09-26 22:02:53 -0700808
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809#ifdef CONFIG_HOTPLUG
Kay Sievers7eff2e72007-08-14 15:15:12 +0200810static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700812 struct net_device *dev = to_net_dev(d);
Kay Sievers7eff2e72007-08-14 15:15:12 +0200813 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814
Kay Sievers312c0042005-11-16 09:00:00 +0100815 /* pass interface to uevent. */
Kay Sievers7eff2e72007-08-14 15:15:12 +0200816 retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
Eric Rannaudbf624562007-03-30 22:23:12 -0700817 if (retval)
818 goto exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
Jean Tourrilhesca2f37d2007-03-07 10:49:30 -0800820 /* pass ifindex to uevent.
821 * ifindex is useful as it won't change (interface name may change)
822 * and is what RtNetlink uses natively. */
Kay Sievers7eff2e72007-08-14 15:15:12 +0200823 retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
Jean Tourrilhesca2f37d2007-03-07 10:49:30 -0800824
Eric Rannaudbf624562007-03-30 22:23:12 -0700825exit:
Eric Rannaudbf624562007-03-30 22:23:12 -0700826 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827}
828#endif
829
830/*
YOSHIFUJI Hideaki4ec93ed2007-02-09 23:24:36 +0900831 * netdev_release -- destroy and free a dead device.
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700832 * Called when last reference to device kobject is gone.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700834static void netdev_release(struct device *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700836 struct net_device *dev = to_net_dev(d);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837
838 BUG_ON(dev->reg_state != NETREG_RELEASED);
839
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700840 kfree(dev->ifalias);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 kfree((char *)dev - dev->padded);
842}
843
Eric W. Biederman608b4b92010-05-04 17:36:45 -0700844static const void *net_namespace(struct device *d)
845{
846 struct net_device *dev;
847 dev = container_of(d, struct net_device, dev);
848 return dev_net(dev);
849}
850
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851static struct class net_class = {
852 .name = "net",
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700853 .dev_release = netdev_release,
Eric W. Biederman8b41d182007-09-26 22:02:53 -0700854#ifdef CONFIG_SYSFS
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700855 .dev_attrs = net_class_attributes,
Eric W. Biederman8b41d182007-09-26 22:02:53 -0700856#endif /* CONFIG_SYSFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857#ifdef CONFIG_HOTPLUG
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700858 .dev_uevent = netdev_uevent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859#endif
Eric W. Biederman608b4b92010-05-04 17:36:45 -0700860 .ns_type = &net_ns_type_operations,
861 .namespace = net_namespace,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862};
863
Stephen Hemminger9093bbb2007-05-19 15:39:25 -0700864/* Delete sysfs entries but hold kobject reference until after all
865 * netdev references are gone.
866 */
Eric W. Biederman8b41d182007-09-26 22:02:53 -0700867void netdev_unregister_kobject(struct net_device * net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868{
Stephen Hemminger9093bbb2007-05-19 15:39:25 -0700869 struct device *dev = &(net->dev);
870
871 kobject_get(&dev->kobj);
Eric W. Biederman38918452008-10-27 17:51:47 -0700872
Stephen Rothwell30bde1f2010-03-29 01:00:44 -0700873#ifdef CONFIG_RPS
Tom Herbert0a9627f2010-03-16 08:03:29 +0000874 rx_queue_remove_kobjects(net);
Tom Herberte880eb62010-03-22 18:06:47 -0700875#endif
Tom Herbert0a9627f2010-03-16 08:03:29 +0000876
Stephen Hemminger9093bbb2007-05-19 15:39:25 -0700877 device_del(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878}
879
880/* Create sysfs entries for network device. */
Eric W. Biederman8b41d182007-09-26 22:02:53 -0700881int netdev_register_kobject(struct net_device *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700883 struct device *dev = &(net->dev);
David Brownella4dbd672009-06-24 10:06:31 -0700884 const struct attribute_group **groups = net->sysfs_groups;
Tom Herbert0a9627f2010-03-16 08:03:29 +0000885 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886
Eric W. Biedermana1b3f592010-05-04 17:36:49 -0700887 device_initialize(dev);
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700888 dev->class = &net_class;
889 dev->platform_data = net;
890 dev->groups = groups;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891
Stephen Hemmingera2205472009-03-09 13:51:55 +0000892 dev_set_name(dev, "%s", net->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893
Eric W. Biederman8b41d182007-09-26 22:02:53 -0700894#ifdef CONFIG_SYSFS
Eric W. Biederman0c509a62009-10-29 14:18:21 +0000895 /* Allow for a device specific group */
896 if (*groups)
897 groups++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898
Eric W. Biederman0c509a62009-10-29 14:18:21 +0000899 *groups++ = &netstat_group;
Johannes Berg22bb1be2008-07-10 11:16:47 +0200900#ifdef CONFIG_WIRELESS_EXT_SYSFS
Johannes Berg3d23e342009-09-29 23:27:28 +0200901 if (net->ieee80211_ptr)
Stephen Hemmingerfe9925b2006-05-06 17:56:03 -0700902 *groups++ = &wireless_group;
Johannes Berg3d23e342009-09-29 23:27:28 +0200903#ifdef CONFIG_WIRELESS_EXT
904 else if (net->wireless_handlers)
905 *groups++ = &wireless_group;
906#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907#endif
Eric W. Biederman8b41d182007-09-26 22:02:53 -0700908#endif /* CONFIG_SYSFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909
Tom Herbert0a9627f2010-03-16 08:03:29 +0000910 error = device_add(dev);
911 if (error)
912 return error;
913
Stephen Rothwell30bde1f2010-03-29 01:00:44 -0700914#ifdef CONFIG_RPS
Tom Herbert0a9627f2010-03-16 08:03:29 +0000915 error = rx_queue_register_kobjects(net);
916 if (error) {
917 device_del(dev);
918 return error;
919 }
Tom Herberte880eb62010-03-22 18:06:47 -0700920#endif
Tom Herbert0a9627f2010-03-16 08:03:29 +0000921
922 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923}
924
Jay Vosburghb8a97872008-06-13 18:12:04 -0700925int netdev_class_create_file(struct class_attribute *class_attr)
926{
927 return class_create_file(&net_class, class_attr);
928}
Eric Dumazet9e34a5b2010-07-09 21:22:04 +0000929EXPORT_SYMBOL(netdev_class_create_file);
Jay Vosburghb8a97872008-06-13 18:12:04 -0700930
931void netdev_class_remove_file(struct class_attribute *class_attr)
932{
933 class_remove_file(&net_class, class_attr);
934}
Jay Vosburghb8a97872008-06-13 18:12:04 -0700935EXPORT_SYMBOL(netdev_class_remove_file);
936
Eric W. Biederman8b41d182007-09-26 22:02:53 -0700937int netdev_kobject_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938{
Eric W. Biederman608b4b92010-05-04 17:36:45 -0700939 kobj_ns_type_register(&net_ns_type_operations);
Eric W. Biedermand6523dd2010-05-16 21:59:45 -0700940 register_pernet_subsys(&kobj_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 return class_register(&net_class);
942}