blob: fdf9e61d0651fab74e2836593a872586cd8efec3 [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>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040023#include <linux/export.h>
Tom Herbert114cf582011-11-28 16:33:09 +000024#include <linux/jiffies.h>
Johannes Berg8f1546c2009-09-28 15:26:43 +020025#include <net/wext.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
Pavel Emelyanov342709e2007-10-23 21:14:45 -070027#include "net-sysfs.h"
28
Eric W. Biederman8b41d182007-09-26 22:02:53 -070029#ifdef CONFIG_SYSFS
Linus Torvalds1da177e2005-04-16 15:20:36 -070030static const char fmt_hex[] = "%#x\n";
David S. Millerd1102b52005-05-29 20:28:25 -070031static const char fmt_long_hex[] = "%#lx\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -070032static const char fmt_dec[] = "%d\n";
David Decotigny8ae6dac2011-04-27 18:32:38 +000033static const char fmt_udec[] = "%u\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -070034static const char fmt_ulong[] = "%lu\n";
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +000035static const char fmt_u64[] = "%llu\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
YOSHIFUJI Hideaki4ec93ed2007-02-09 23:24:36 +090037static inline int dev_isalive(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070038{
Stephen Hemmingerfe9925b2006-05-06 17:56:03 -070039 return dev->reg_state <= NETREG_REGISTERED;
Linus Torvalds1da177e2005-04-16 15:20:36 -070040}
41
42/* use same locking rules as GIF* ioctl's */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -070043static ssize_t netdev_show(const struct device *dev,
44 struct device_attribute *attr, char *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 ssize_t (*format)(const struct net_device *, char *))
46{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -070047 struct net_device *net = to_net_dev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 ssize_t ret = -EINVAL;
49
50 read_lock(&dev_base_lock);
51 if (dev_isalive(net))
52 ret = (*format)(net, buf);
53 read_unlock(&dev_base_lock);
54
55 return ret;
56}
57
58/* generate a show function for simple field */
59#define NETDEVICE_SHOW(field, format_string) \
60static ssize_t format_##field(const struct net_device *net, char *buf) \
61{ \
62 return sprintf(buf, format_string, net->field); \
63} \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -070064static ssize_t show_##field(struct device *dev, \
65 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{ \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -070067 return netdev_show(dev, attr, buf, format_##field); \
Linus Torvalds1da177e2005-04-16 15:20:36 -070068}
69
70
71/* use same locking and permission rules as SIF* ioctl's */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -070072static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 const char *buf, size_t len,
74 int (*set)(struct net_device *, unsigned long))
75{
76 struct net_device *net = to_net_dev(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 unsigned long new;
78 int ret = -EINVAL;
79
80 if (!capable(CAP_NET_ADMIN))
81 return -EPERM;
82
Shuah Khane1e420c2012-04-12 09:28:13 +000083 ret = kstrtoul(buf, 0, &new);
84 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 goto err;
86
Stephen Hemminger5a5990d2009-02-26 06:49:24 +000087 if (!rtnl_trylock())
Eric W. Biederman336ca572009-05-13 16:57:25 +000088 return restart_syscall();
Stephen Hemminger5a5990d2009-02-26 06:49:24 +000089
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 if (dev_isalive(net)) {
91 if ((ret = (*set)(net, new)) == 0)
92 ret = len;
93 }
94 rtnl_unlock();
95 err:
96 return ret;
97}
98
David Woodhouse9d296722008-04-20 16:07:43 -070099NETDEVICE_SHOW(dev_id, fmt_hex);
Stefan Assmannc1f79422010-07-22 02:50:21 +0000100NETDEVICE_SHOW(addr_assign_type, fmt_dec);
Kay Sieversfd586ba2005-12-19 01:42:56 +0100101NETDEVICE_SHOW(addr_len, fmt_dec);
102NETDEVICE_SHOW(iflink, fmt_dec);
103NETDEVICE_SHOW(ifindex, fmt_dec);
Kay Sieversfd586ba2005-12-19 01:42:56 +0100104NETDEVICE_SHOW(type, fmt_dec);
Stefan Rompfb00055a2006-03-20 17:09:11 -0800105NETDEVICE_SHOW(link_mode, fmt_dec);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
107/* use same locking rules as GIFHWADDR ioctl's */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700108static ssize_t show_address(struct device *dev, struct device_attribute *attr,
109 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110{
111 struct net_device *net = to_net_dev(dev);
112 ssize_t ret = -EINVAL;
113
114 read_lock(&dev_base_lock);
115 if (dev_isalive(net))
Michael Chan7ffc49a2007-12-24 21:28:09 -0800116 ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 read_unlock(&dev_base_lock);
118 return ret;
119}
120
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700121static ssize_t show_broadcast(struct device *dev,
122 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123{
124 struct net_device *net = to_net_dev(dev);
125 if (dev_isalive(net))
Michael Chan7ffc49a2007-12-24 21:28:09 -0800126 return sysfs_format_mac(buf, net->broadcast, net->addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 return -EINVAL;
128}
129
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700130static ssize_t show_carrier(struct device *dev,
131 struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132{
133 struct net_device *netdev = to_net_dev(dev);
134 if (netif_running(netdev)) {
135 return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
136 }
137 return -EINVAL;
138}
139
Andy Gospodarekd519e172009-10-02 09:26:12 +0000140static ssize_t show_speed(struct device *dev,
141 struct device_attribute *attr, char *buf)
142{
143 struct net_device *netdev = to_net_dev(dev);
144 int ret = -EINVAL;
145
146 if (!rtnl_trylock())
147 return restart_syscall();
148
David Decotigny8ae6dac2011-04-27 18:32:38 +0000149 if (netif_running(netdev)) {
150 struct ethtool_cmd cmd;
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000151 if (!__ethtool_get_settings(netdev, &cmd))
David Decotigny8ae6dac2011-04-27 18:32:38 +0000152 ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd));
Andy Gospodarekd519e172009-10-02 09:26:12 +0000153 }
154 rtnl_unlock();
155 return ret;
156}
157
158static ssize_t show_duplex(struct device *dev,
159 struct device_attribute *attr, char *buf)
160{
161 struct net_device *netdev = to_net_dev(dev);
162 int ret = -EINVAL;
163
164 if (!rtnl_trylock())
165 return restart_syscall();
166
David Decotigny8ae6dac2011-04-27 18:32:38 +0000167 if (netif_running(netdev)) {
168 struct ethtool_cmd cmd;
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000169 if (!__ethtool_get_settings(netdev, &cmd))
David Decotigny8ae6dac2011-04-27 18:32:38 +0000170 ret = sprintf(buf, "%s\n",
171 cmd.duplex ? "full" : "half");
Andy Gospodarekd519e172009-10-02 09:26:12 +0000172 }
173 rtnl_unlock();
174 return ret;
175}
176
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700177static ssize_t show_dormant(struct device *dev,
178 struct device_attribute *attr, char *buf)
Stefan Rompfb00055a2006-03-20 17:09:11 -0800179{
180 struct net_device *netdev = to_net_dev(dev);
181
182 if (netif_running(netdev))
183 return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
184
185 return -EINVAL;
186}
187
Jan Engelhardt36cbd3d2009-08-05 10:42:58 -0700188static const char *const operstates[] = {
Stefan Rompfb00055a2006-03-20 17:09:11 -0800189 "unknown",
190 "notpresent", /* currently unused */
191 "down",
192 "lowerlayerdown",
193 "testing", /* currently unused */
194 "dormant",
195 "up"
196};
197
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700198static ssize_t show_operstate(struct device *dev,
199 struct device_attribute *attr, char *buf)
Stefan Rompfb00055a2006-03-20 17:09:11 -0800200{
201 const struct net_device *netdev = to_net_dev(dev);
202 unsigned char operstate;
203
204 read_lock(&dev_base_lock);
205 operstate = netdev->operstate;
206 if (!netif_running(netdev))
207 operstate = IF_OPER_DOWN;
208 read_unlock(&dev_base_lock);
209
Adrian Bunke3a5cd92006-04-05 22:19:47 -0700210 if (operstate >= ARRAY_SIZE(operstates))
Stefan Rompfb00055a2006-03-20 17:09:11 -0800211 return -EINVAL; /* should not happen */
212
213 return sprintf(buf, "%s\n", operstates[operstate]);
214}
215
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216/* read-write attributes */
217NETDEVICE_SHOW(mtu, fmt_dec);
218
219static int change_mtu(struct net_device *net, unsigned long new_mtu)
220{
221 return dev_set_mtu(net, (int) new_mtu);
222}
223
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700224static ssize_t store_mtu(struct device *dev, struct device_attribute *attr,
225 const char *buf, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700227 return netdev_store(dev, attr, buf, len, change_mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228}
229
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230NETDEVICE_SHOW(flags, fmt_hex);
231
232static int change_flags(struct net_device *net, unsigned long new_flags)
233{
Eric Dumazet95c96172012-04-15 05:58:06 +0000234 return dev_change_flags(net, (unsigned int) new_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235}
236
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700237static ssize_t store_flags(struct device *dev, struct device_attribute *attr,
238 const char *buf, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700240 return netdev_store(dev, attr, buf, len, change_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241}
242
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243NETDEVICE_SHOW(tx_queue_len, fmt_ulong);
244
245static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
246{
247 net->tx_queue_len = new_len;
248 return 0;
249}
250
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700251static ssize_t store_tx_queue_len(struct device *dev,
252 struct device_attribute *attr,
253 const char *buf, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700255 return netdev_store(dev, attr, buf, len, change_tx_queue_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256}
257
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700258static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr,
259 const char *buf, size_t len)
260{
261 struct net_device *netdev = to_net_dev(dev);
262 size_t count = len;
263 ssize_t ret;
264
265 if (!capable(CAP_NET_ADMIN))
266 return -EPERM;
267
268 /* ignore trailing newline */
269 if (len > 0 && buf[len - 1] == '\n')
270 --count;
271
Eric W. Biederman336ca572009-05-13 16:57:25 +0000272 if (!rtnl_trylock())
273 return restart_syscall();
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700274 ret = dev_set_alias(netdev, buf, count);
275 rtnl_unlock();
276
277 return ret < 0 ? ret : len;
278}
279
280static ssize_t show_ifalias(struct device *dev,
281 struct device_attribute *attr, char *buf)
282{
283 const struct net_device *netdev = to_net_dev(dev);
284 ssize_t ret = 0;
285
Eric W. Biederman336ca572009-05-13 16:57:25 +0000286 if (!rtnl_trylock())
287 return restart_syscall();
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700288 if (netdev->ifalias)
289 ret = sprintf(buf, "%s\n", netdev->ifalias);
290 rtnl_unlock();
291 return ret;
292}
293
Vlad Dogarua512b922011-01-24 03:37:29 +0000294NETDEVICE_SHOW(group, fmt_dec);
295
296static int change_group(struct net_device *net, unsigned long new_group)
297{
298 dev_set_group(net, (int) new_group);
299 return 0;
300}
301
302static ssize_t store_group(struct device *dev, struct device_attribute *attr,
303 const char *buf, size_t len)
304{
305 return netdev_store(dev, attr, buf, len, change_group);
306}
307
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700308static struct device_attribute net_class_attributes[] = {
Stefan Assmannc1f79422010-07-22 02:50:21 +0000309 __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100310 __ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
David Woodhouse9d296722008-04-20 16:07:43 -0700311 __ATTR(dev_id, S_IRUGO, show_dev_id, NULL),
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700312 __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100313 __ATTR(iflink, S_IRUGO, show_iflink, NULL),
314 __ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100315 __ATTR(type, S_IRUGO, show_type, NULL),
Stefan Rompfb00055a2006-03-20 17:09:11 -0800316 __ATTR(link_mode, S_IRUGO, show_link_mode, NULL),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100317 __ATTR(address, S_IRUGO, show_address, NULL),
318 __ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
319 __ATTR(carrier, S_IRUGO, show_carrier, NULL),
Andy Gospodarekd519e172009-10-02 09:26:12 +0000320 __ATTR(speed, S_IRUGO, show_speed, NULL),
321 __ATTR(duplex, S_IRUGO, show_duplex, NULL),
Stefan Rompfb00055a2006-03-20 17:09:11 -0800322 __ATTR(dormant, S_IRUGO, show_dormant, NULL),
323 __ATTR(operstate, S_IRUGO, show_operstate, NULL),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100324 __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu),
325 __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags),
326 __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
327 store_tx_queue_len),
Xiaotian Fengb6644cb2011-02-09 19:16:15 -0800328 __ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100329 {}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330};
331
332/* Show a given an attribute in the statistics group */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700333static ssize_t netstat_show(const struct device *d,
334 struct device_attribute *attr, char *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 unsigned long offset)
336{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700337 struct net_device *dev = to_net_dev(d);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 ssize_t ret = -EINVAL;
339
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000340 WARN_ON(offset > sizeof(struct rtnl_link_stats64) ||
341 offset % sizeof(u64) != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343 read_lock(&dev_base_lock);
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700344 if (dev_isalive(dev)) {
Eric Dumazet28172732010-07-07 14:58:56 -0700345 struct rtnl_link_stats64 temp;
346 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
347
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000348 ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset));
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700349 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 read_unlock(&dev_base_lock);
351 return ret;
352}
353
354/* generate a read-only statistics attribute */
355#define NETSTAT_ENTRY(name) \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700356static ssize_t show_##name(struct device *d, \
357 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358{ \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700359 return netstat_show(d, attr, buf, \
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000360 offsetof(struct rtnl_link_stats64, name)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361} \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700362static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
364NETSTAT_ENTRY(rx_packets);
365NETSTAT_ENTRY(tx_packets);
366NETSTAT_ENTRY(rx_bytes);
367NETSTAT_ENTRY(tx_bytes);
368NETSTAT_ENTRY(rx_errors);
369NETSTAT_ENTRY(tx_errors);
370NETSTAT_ENTRY(rx_dropped);
371NETSTAT_ENTRY(tx_dropped);
372NETSTAT_ENTRY(multicast);
373NETSTAT_ENTRY(collisions);
374NETSTAT_ENTRY(rx_length_errors);
375NETSTAT_ENTRY(rx_over_errors);
376NETSTAT_ENTRY(rx_crc_errors);
377NETSTAT_ENTRY(rx_frame_errors);
378NETSTAT_ENTRY(rx_fifo_errors);
379NETSTAT_ENTRY(rx_missed_errors);
380NETSTAT_ENTRY(tx_aborted_errors);
381NETSTAT_ENTRY(tx_carrier_errors);
382NETSTAT_ENTRY(tx_fifo_errors);
383NETSTAT_ENTRY(tx_heartbeat_errors);
384NETSTAT_ENTRY(tx_window_errors);
385NETSTAT_ENTRY(rx_compressed);
386NETSTAT_ENTRY(tx_compressed);
387
388static struct attribute *netstat_attrs[] = {
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700389 &dev_attr_rx_packets.attr,
390 &dev_attr_tx_packets.attr,
391 &dev_attr_rx_bytes.attr,
392 &dev_attr_tx_bytes.attr,
393 &dev_attr_rx_errors.attr,
394 &dev_attr_tx_errors.attr,
395 &dev_attr_rx_dropped.attr,
396 &dev_attr_tx_dropped.attr,
397 &dev_attr_multicast.attr,
398 &dev_attr_collisions.attr,
399 &dev_attr_rx_length_errors.attr,
400 &dev_attr_rx_over_errors.attr,
401 &dev_attr_rx_crc_errors.attr,
402 &dev_attr_rx_frame_errors.attr,
403 &dev_attr_rx_fifo_errors.attr,
404 &dev_attr_rx_missed_errors.attr,
405 &dev_attr_tx_aborted_errors.attr,
406 &dev_attr_tx_carrier_errors.attr,
407 &dev_attr_tx_fifo_errors.attr,
408 &dev_attr_tx_heartbeat_errors.attr,
409 &dev_attr_tx_window_errors.attr,
410 &dev_attr_rx_compressed.attr,
411 &dev_attr_tx_compressed.attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 NULL
413};
414
415
416static struct attribute_group netstat_group = {
417 .name = "statistics",
418 .attrs = netstat_attrs,
419};
420
Johannes Berg22bb1be2008-07-10 11:16:47 +0200421#ifdef CONFIG_WIRELESS_EXT_SYSFS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422/* helper function that does all the locking etc for wireless stats */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700423static ssize_t wireless_show(struct device *d, char *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 ssize_t (*format)(const struct iw_statistics *,
425 char *))
426{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700427 struct net_device *dev = to_net_dev(d);
Johannes Berg8f1546c2009-09-28 15:26:43 +0200428 const struct iw_statistics *iw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 ssize_t ret = -EINVAL;
YOSHIFUJI Hideaki4ec93ed2007-02-09 23:24:36 +0900430
Eric W. Biedermanb8afe642010-02-19 13:23:47 +0000431 if (!rtnl_trylock())
432 return restart_syscall();
Andrey Borzenkov6dd214b2006-01-09 20:51:28 -0800433 if (dev_isalive(dev)) {
Johannes Berg8f1546c2009-09-28 15:26:43 +0200434 iw = get_wireless_stats(dev);
435 if (iw)
Andrey Borzenkov6dd214b2006-01-09 20:51:28 -0800436 ret = (*format)(iw, buf);
437 }
Johannes Berga160ee62009-10-05 02:22:23 -0700438 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
440 return ret;
441}
442
443/* show function template for wireless fields */
444#define WIRELESS_SHOW(name, field, format_string) \
445static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \
446{ \
447 return sprintf(buf, format_string, iw->field); \
448} \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700449static ssize_t show_iw_##name(struct device *d, \
450 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451{ \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700452 return wireless_show(d, buf, format_iw_##name); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453} \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700454static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
456WIRELESS_SHOW(status, status, fmt_hex);
457WIRELESS_SHOW(link, qual.qual, fmt_dec);
458WIRELESS_SHOW(level, qual.level, fmt_dec);
459WIRELESS_SHOW(noise, qual.noise, fmt_dec);
460WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
461WIRELESS_SHOW(crypt, discard.code, fmt_dec);
462WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
463WIRELESS_SHOW(misc, discard.misc, fmt_dec);
464WIRELESS_SHOW(retries, discard.retries, fmt_dec);
465WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
466
467static struct attribute *wireless_attrs[] = {
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700468 &dev_attr_status.attr,
469 &dev_attr_link.attr,
470 &dev_attr_level.attr,
471 &dev_attr_noise.attr,
472 &dev_attr_nwid.attr,
473 &dev_attr_crypt.attr,
474 &dev_attr_fragment.attr,
475 &dev_attr_retries.attr,
476 &dev_attr_misc.attr,
477 &dev_attr_beacon.attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 NULL
479};
480
481static struct attribute_group wireless_group = {
482 .name = "wireless",
483 .attrs = wireless_attrs,
484};
485#endif
Eric W. Biedermand6523dd2010-05-16 21:59:45 -0700486#endif /* CONFIG_SYSFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487
Stephen Rothwell30bde1f2010-03-29 01:00:44 -0700488#ifdef CONFIG_RPS
Tom Herbert0a9627f2010-03-16 08:03:29 +0000489/*
490 * RX queue sysfs structures and functions.
491 */
492struct rx_queue_attribute {
493 struct attribute attr;
494 ssize_t (*show)(struct netdev_rx_queue *queue,
495 struct rx_queue_attribute *attr, char *buf);
496 ssize_t (*store)(struct netdev_rx_queue *queue,
497 struct rx_queue_attribute *attr, const char *buf, size_t len);
498};
499#define to_rx_queue_attr(_attr) container_of(_attr, \
500 struct rx_queue_attribute, attr)
501
502#define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj)
503
504static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr,
505 char *buf)
506{
507 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
508 struct netdev_rx_queue *queue = to_rx_queue(kobj);
509
510 if (!attribute->show)
511 return -EIO;
512
513 return attribute->show(queue, attribute, buf);
514}
515
516static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr,
517 const char *buf, size_t count)
518{
519 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
520 struct netdev_rx_queue *queue = to_rx_queue(kobj);
521
522 if (!attribute->store)
523 return -EIO;
524
525 return attribute->store(queue, attribute, buf, count);
526}
527
stephen hemmingerfa50d642010-08-31 12:14:13 +0000528static const struct sysfs_ops rx_queue_sysfs_ops = {
Tom Herbert0a9627f2010-03-16 08:03:29 +0000529 .show = rx_queue_attr_show,
530 .store = rx_queue_attr_store,
531};
532
533static ssize_t show_rps_map(struct netdev_rx_queue *queue,
534 struct rx_queue_attribute *attribute, char *buf)
535{
536 struct rps_map *map;
537 cpumask_var_t mask;
538 size_t len = 0;
539 int i;
540
541 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
542 return -ENOMEM;
543
544 rcu_read_lock();
545 map = rcu_dereference(queue->rps_map);
546 if (map)
547 for (i = 0; i < map->len; i++)
548 cpumask_set_cpu(map->cpus[i], mask);
549
550 len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
551 if (PAGE_SIZE - len < 3) {
552 rcu_read_unlock();
553 free_cpumask_var(mask);
554 return -EINVAL;
555 }
556 rcu_read_unlock();
557
558 free_cpumask_var(mask);
559 len += sprintf(buf + len, "\n");
560 return len;
561}
562
Eric Dumazetf5acb902010-04-19 14:40:57 -0700563static ssize_t store_rps_map(struct netdev_rx_queue *queue,
Tom Herbert0a9627f2010-03-16 08:03:29 +0000564 struct rx_queue_attribute *attribute,
565 const char *buf, size_t len)
566{
567 struct rps_map *old_map, *map;
568 cpumask_var_t mask;
569 int err, cpu, i;
570 static DEFINE_SPINLOCK(rps_map_lock);
571
572 if (!capable(CAP_NET_ADMIN))
573 return -EPERM;
574
575 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
576 return -ENOMEM;
577
578 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
579 if (err) {
580 free_cpumask_var(mask);
581 return err;
582 }
583
Eric Dumazet95c96172012-04-15 05:58:06 +0000584 map = kzalloc(max_t(unsigned int,
Tom Herbert0a9627f2010-03-16 08:03:29 +0000585 RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES),
586 GFP_KERNEL);
587 if (!map) {
588 free_cpumask_var(mask);
589 return -ENOMEM;
590 }
591
592 i = 0;
593 for_each_cpu_and(cpu, mask, cpu_online_mask)
594 map->cpus[i++] = cpu;
595
596 if (i)
597 map->len = i;
598 else {
599 kfree(map);
600 map = NULL;
601 }
602
603 spin_lock(&rps_map_lock);
Eric Dumazet6e3f7fa2010-10-25 03:02:02 +0000604 old_map = rcu_dereference_protected(queue->rps_map,
605 lockdep_is_held(&rps_map_lock));
Tom Herbert0a9627f2010-03-16 08:03:29 +0000606 rcu_assign_pointer(queue->rps_map, map);
607 spin_unlock(&rps_map_lock);
608
Eric Dumazetadc93002011-11-17 03:13:26 +0000609 if (map)
Ingo Molnarc5905af2012-02-24 08:31:31 +0100610 static_key_slow_inc(&rps_needed);
Eric Dumazetadc93002011-11-17 03:13:26 +0000611 if (old_map) {
Lai Jiangshanf6f80232011-03-18 12:01:31 +0800612 kfree_rcu(old_map, rcu);
Ingo Molnarc5905af2012-02-24 08:31:31 +0100613 static_key_slow_dec(&rps_needed);
Eric Dumazetadc93002011-11-17 03:13:26 +0000614 }
Tom Herbert0a9627f2010-03-16 08:03:29 +0000615 free_cpumask_var(mask);
616 return len;
617}
618
Tom Herbertfec5e652010-04-16 16:01:27 -0700619static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
620 struct rx_queue_attribute *attr,
621 char *buf)
622{
623 struct rps_dev_flow_table *flow_table;
Eric Dumazet60b778c2011-12-24 06:56:49 +0000624 unsigned long val = 0;
Tom Herbertfec5e652010-04-16 16:01:27 -0700625
626 rcu_read_lock();
627 flow_table = rcu_dereference(queue->rps_flow_table);
628 if (flow_table)
Eric Dumazet60b778c2011-12-24 06:56:49 +0000629 val = (unsigned long)flow_table->mask + 1;
Tom Herbertfec5e652010-04-16 16:01:27 -0700630 rcu_read_unlock();
631
Eric Dumazet60b778c2011-12-24 06:56:49 +0000632 return sprintf(buf, "%lu\n", val);
Tom Herbertfec5e652010-04-16 16:01:27 -0700633}
634
635static void rps_dev_flow_table_release_work(struct work_struct *work)
636{
637 struct rps_dev_flow_table *table = container_of(work,
638 struct rps_dev_flow_table, free_work);
639
640 vfree(table);
641}
642
643static void rps_dev_flow_table_release(struct rcu_head *rcu)
644{
645 struct rps_dev_flow_table *table = container_of(rcu,
646 struct rps_dev_flow_table, rcu);
647
648 INIT_WORK(&table->free_work, rps_dev_flow_table_release_work);
649 schedule_work(&table->free_work);
650}
651
Eric Dumazetf5acb902010-04-19 14:40:57 -0700652static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
Tom Herbertfec5e652010-04-16 16:01:27 -0700653 struct rx_queue_attribute *attr,
654 const char *buf, size_t len)
655{
Eric Dumazet60b778c2011-12-24 06:56:49 +0000656 unsigned long mask, count;
Tom Herbertfec5e652010-04-16 16:01:27 -0700657 struct rps_dev_flow_table *table, *old_table;
658 static DEFINE_SPINLOCK(rps_dev_flow_lock);
Eric Dumazet60b778c2011-12-24 06:56:49 +0000659 int rc;
Tom Herbertfec5e652010-04-16 16:01:27 -0700660
661 if (!capable(CAP_NET_ADMIN))
662 return -EPERM;
663
Eric Dumazet60b778c2011-12-24 06:56:49 +0000664 rc = kstrtoul(buf, 0, &count);
665 if (rc < 0)
666 return rc;
Tom Herbertfec5e652010-04-16 16:01:27 -0700667
668 if (count) {
Eric Dumazet60b778c2011-12-24 06:56:49 +0000669 mask = count - 1;
670 /* mask = roundup_pow_of_two(count) - 1;
671 * without overflows...
672 */
673 while ((mask | (mask >> 1)) != mask)
674 mask |= (mask >> 1);
675 /* On 64 bit arches, must check mask fits in table->mask (u32),
676 * and on 32bit arches, must check RPS_DEV_FLOW_TABLE_SIZE(mask + 1)
677 * doesnt overflow.
678 */
679#if BITS_PER_LONG > 32
680 if (mask > (unsigned long)(u32)mask)
Xi Wanga0a129f2011-12-22 13:35:22 +0000681 return -EINVAL;
Eric Dumazet60b778c2011-12-24 06:56:49 +0000682#else
683 if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1))
Xi Wanga0a129f2011-12-22 13:35:22 +0000684 / sizeof(struct rps_dev_flow)) {
Tom Herbertfec5e652010-04-16 16:01:27 -0700685 /* Enforce a limit to prevent overflow */
686 return -EINVAL;
687 }
Eric Dumazet60b778c2011-12-24 06:56:49 +0000688#endif
689 table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1));
Tom Herbertfec5e652010-04-16 16:01:27 -0700690 if (!table)
691 return -ENOMEM;
692
Eric Dumazet60b778c2011-12-24 06:56:49 +0000693 table->mask = mask;
694 for (count = 0; count <= mask; count++)
695 table->flows[count].cpu = RPS_NO_CPU;
Tom Herbertfec5e652010-04-16 16:01:27 -0700696 } else
697 table = NULL;
698
699 spin_lock(&rps_dev_flow_lock);
Eric Dumazet6e3f7fa2010-10-25 03:02:02 +0000700 old_table = rcu_dereference_protected(queue->rps_flow_table,
701 lockdep_is_held(&rps_dev_flow_lock));
Tom Herbertfec5e652010-04-16 16:01:27 -0700702 rcu_assign_pointer(queue->rps_flow_table, table);
703 spin_unlock(&rps_dev_flow_lock);
704
705 if (old_table)
706 call_rcu(&old_table->rcu, rps_dev_flow_table_release);
707
708 return len;
709}
710
Tom Herbert0a9627f2010-03-16 08:03:29 +0000711static struct rx_queue_attribute rps_cpus_attribute =
712 __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map);
713
Tom Herbertfec5e652010-04-16 16:01:27 -0700714
715static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute =
716 __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR,
717 show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt);
718
Tom Herbert0a9627f2010-03-16 08:03:29 +0000719static struct attribute *rx_queue_default_attrs[] = {
720 &rps_cpus_attribute.attr,
Tom Herbertfec5e652010-04-16 16:01:27 -0700721 &rps_dev_flow_table_cnt_attribute.attr,
Tom Herbert0a9627f2010-03-16 08:03:29 +0000722 NULL
723};
724
725static void rx_queue_release(struct kobject *kobj)
726{
727 struct netdev_rx_queue *queue = to_rx_queue(kobj);
Eric Dumazet6e3f7fa2010-10-25 03:02:02 +0000728 struct rps_map *map;
729 struct rps_dev_flow_table *flow_table;
Tom Herbert0a9627f2010-03-16 08:03:29 +0000730
Tom Herbertfec5e652010-04-16 16:01:27 -0700731
Eric Dumazet33d480c2011-08-11 19:30:52 +0000732 map = rcu_dereference_protected(queue->rps_map, 1);
John Fastabend9ea19482010-11-16 06:31:39 +0000733 if (map) {
734 RCU_INIT_POINTER(queue->rps_map, NULL);
Lai Jiangshanf6f80232011-03-18 12:01:31 +0800735 kfree_rcu(map, rcu);
John Fastabend9ea19482010-11-16 06:31:39 +0000736 }
Eric Dumazet6e3f7fa2010-10-25 03:02:02 +0000737
Eric Dumazet33d480c2011-08-11 19:30:52 +0000738 flow_table = rcu_dereference_protected(queue->rps_flow_table, 1);
John Fastabend9ea19482010-11-16 06:31:39 +0000739 if (flow_table) {
740 RCU_INIT_POINTER(queue->rps_flow_table, NULL);
Eric Dumazet6e3f7fa2010-10-25 03:02:02 +0000741 call_rcu(&flow_table->rcu, rps_dev_flow_table_release);
John Fastabend9ea19482010-11-16 06:31:39 +0000742 }
Tom Herbert0a9627f2010-03-16 08:03:29 +0000743
John Fastabend9ea19482010-11-16 06:31:39 +0000744 memset(kobj, 0, sizeof(*kobj));
Tom Herbertfe822242010-11-09 10:47:38 +0000745 dev_put(queue->dev);
Tom Herbert0a9627f2010-03-16 08:03:29 +0000746}
747
748static struct kobj_type rx_queue_ktype = {
749 .sysfs_ops = &rx_queue_sysfs_ops,
750 .release = rx_queue_release,
751 .default_attrs = rx_queue_default_attrs,
752};
753
754static int rx_queue_add_kobject(struct net_device *net, int index)
755{
756 struct netdev_rx_queue *queue = net->_rx + index;
757 struct kobject *kobj = &queue->kobj;
758 int error = 0;
759
760 kobj->kset = net->queues_kset;
761 error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
762 "rx-%u", index);
763 if (error) {
764 kobject_put(kobj);
765 return error;
766 }
767
768 kobject_uevent(kobj, KOBJ_ADD);
Tom Herbertfe822242010-11-09 10:47:38 +0000769 dev_hold(queue->dev);
Tom Herbert0a9627f2010-03-16 08:03:29 +0000770
771 return error;
772}
Tom Herbertbf264142010-11-26 08:36:09 +0000773#endif /* CONFIG_RPS */
Tom Herbert0a9627f2010-03-16 08:03:29 +0000774
Ben Hutchings62fe0b42010-09-27 08:24:33 +0000775int
776net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
Tom Herbert0a9627f2010-03-16 08:03:29 +0000777{
Tom Herbertbf264142010-11-26 08:36:09 +0000778#ifdef CONFIG_RPS
Tom Herbert0a9627f2010-03-16 08:03:29 +0000779 int i;
780 int error = 0;
781
Ben Hutchings62fe0b42010-09-27 08:24:33 +0000782 for (i = old_num; i < new_num; i++) {
Tom Herbert0a9627f2010-03-16 08:03:29 +0000783 error = rx_queue_add_kobject(net, i);
Ben Hutchings62fe0b42010-09-27 08:24:33 +0000784 if (error) {
785 new_num = old_num;
Tom Herbert0a9627f2010-03-16 08:03:29 +0000786 break;
Ben Hutchings62fe0b42010-09-27 08:24:33 +0000787 }
Tom Herbert0a9627f2010-03-16 08:03:29 +0000788 }
789
Ben Hutchings62fe0b42010-09-27 08:24:33 +0000790 while (--i >= new_num)
791 kobject_put(&net->_rx[i].kobj);
Tom Herbert0a9627f2010-03-16 08:03:29 +0000792
793 return error;
Tom Herbertbf264142010-11-26 08:36:09 +0000794#else
795 return 0;
796#endif
Tom Herbert0a9627f2010-03-16 08:03:29 +0000797}
798
david decotignyccf5ff62011-11-16 12:15:10 +0000799#ifdef CONFIG_SYSFS
Tom Herbert1d24eb42010-11-21 13:17:27 +0000800/*
801 * netdev_queue sysfs structures and functions.
802 */
803struct netdev_queue_attribute {
804 struct attribute attr;
805 ssize_t (*show)(struct netdev_queue *queue,
806 struct netdev_queue_attribute *attr, char *buf);
807 ssize_t (*store)(struct netdev_queue *queue,
808 struct netdev_queue_attribute *attr, const char *buf, size_t len);
809};
810#define to_netdev_queue_attr(_attr) container_of(_attr, \
811 struct netdev_queue_attribute, attr)
812
813#define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj)
814
815static ssize_t netdev_queue_attr_show(struct kobject *kobj,
816 struct attribute *attr, char *buf)
Ben Hutchings62fe0b42010-09-27 08:24:33 +0000817{
Tom Herbert1d24eb42010-11-21 13:17:27 +0000818 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
819 struct netdev_queue *queue = to_netdev_queue(kobj);
820
821 if (!attribute->show)
822 return -EIO;
823
824 return attribute->show(queue, attribute, buf);
825}
826
827static ssize_t netdev_queue_attr_store(struct kobject *kobj,
828 struct attribute *attr,
829 const char *buf, size_t count)
830{
831 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
832 struct netdev_queue *queue = to_netdev_queue(kobj);
833
834 if (!attribute->store)
835 return -EIO;
836
837 return attribute->store(queue, attribute, buf, count);
838}
839
840static const struct sysfs_ops netdev_queue_sysfs_ops = {
841 .show = netdev_queue_attr_show,
842 .store = netdev_queue_attr_store,
843};
844
david decotignyccf5ff62011-11-16 12:15:10 +0000845static ssize_t show_trans_timeout(struct netdev_queue *queue,
846 struct netdev_queue_attribute *attribute,
847 char *buf)
848{
849 unsigned long trans_timeout;
850
851 spin_lock_irq(&queue->_xmit_lock);
852 trans_timeout = queue->trans_timeout;
853 spin_unlock_irq(&queue->_xmit_lock);
854
855 return sprintf(buf, "%lu", trans_timeout);
856}
857
858static struct netdev_queue_attribute queue_trans_timeout =
859 __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL);
860
Tom Herbert114cf582011-11-28 16:33:09 +0000861#ifdef CONFIG_BQL
862/*
863 * Byte queue limits sysfs structures and functions.
864 */
865static ssize_t bql_show(char *buf, unsigned int value)
866{
867 return sprintf(buf, "%u\n", value);
868}
869
870static ssize_t bql_set(const char *buf, const size_t count,
871 unsigned int *pvalue)
872{
873 unsigned int value;
874 int err;
875
876 if (!strcmp(buf, "max") || !strcmp(buf, "max\n"))
877 value = DQL_MAX_LIMIT;
878 else {
879 err = kstrtouint(buf, 10, &value);
880 if (err < 0)
881 return err;
882 if (value > DQL_MAX_LIMIT)
883 return -EINVAL;
884 }
885
886 *pvalue = value;
887
888 return count;
889}
890
891static ssize_t bql_show_hold_time(struct netdev_queue *queue,
892 struct netdev_queue_attribute *attr,
893 char *buf)
894{
895 struct dql *dql = &queue->dql;
896
897 return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time));
898}
899
900static ssize_t bql_set_hold_time(struct netdev_queue *queue,
901 struct netdev_queue_attribute *attribute,
902 const char *buf, size_t len)
903{
904 struct dql *dql = &queue->dql;
Eric Dumazet95c96172012-04-15 05:58:06 +0000905 unsigned int value;
Tom Herbert114cf582011-11-28 16:33:09 +0000906 int err;
907
908 err = kstrtouint(buf, 10, &value);
909 if (err < 0)
910 return err;
911
912 dql->slack_hold_time = msecs_to_jiffies(value);
913
914 return len;
915}
916
917static struct netdev_queue_attribute bql_hold_time_attribute =
918 __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time,
919 bql_set_hold_time);
920
921static ssize_t bql_show_inflight(struct netdev_queue *queue,
922 struct netdev_queue_attribute *attr,
923 char *buf)
924{
925 struct dql *dql = &queue->dql;
926
927 return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed);
928}
929
930static struct netdev_queue_attribute bql_inflight_attribute =
Hiroaki SHIMODA795d9a22012-01-14 07:10:21 +0000931 __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL);
Tom Herbert114cf582011-11-28 16:33:09 +0000932
933#define BQL_ATTR(NAME, FIELD) \
934static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \
935 struct netdev_queue_attribute *attr, \
936 char *buf) \
937{ \
938 return bql_show(buf, queue->dql.FIELD); \
939} \
940 \
941static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \
942 struct netdev_queue_attribute *attr, \
943 const char *buf, size_t len) \
944{ \
945 return bql_set(buf, len, &queue->dql.FIELD); \
946} \
947 \
948static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \
949 __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \
950 bql_set_ ## NAME);
951
952BQL_ATTR(limit, limit)
953BQL_ATTR(limit_max, max_limit)
954BQL_ATTR(limit_min, min_limit)
955
956static struct attribute *dql_attrs[] = {
957 &bql_limit_attribute.attr,
958 &bql_limit_max_attribute.attr,
959 &bql_limit_min_attribute.attr,
960 &bql_hold_time_attribute.attr,
961 &bql_inflight_attribute.attr,
962 NULL
963};
964
965static struct attribute_group dql_group = {
966 .name = "byte_queue_limits",
967 .attrs = dql_attrs,
968};
969#endif /* CONFIG_BQL */
970
david decotignyccf5ff62011-11-16 12:15:10 +0000971#ifdef CONFIG_XPS
Tom Herbert1d24eb42010-11-21 13:17:27 +0000972static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue)
973{
974 struct net_device *dev = queue->dev;
975 int i;
976
977 for (i = 0; i < dev->num_tx_queues; i++)
978 if (queue == &dev->_tx[i])
979 break;
980
981 BUG_ON(i >= dev->num_tx_queues);
982
983 return i;
984}
985
986
987static ssize_t show_xps_map(struct netdev_queue *queue,
988 struct netdev_queue_attribute *attribute, char *buf)
989{
990 struct net_device *dev = queue->dev;
991 struct xps_dev_maps *dev_maps;
992 cpumask_var_t mask;
993 unsigned long index;
994 size_t len = 0;
995 int i;
996
997 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
998 return -ENOMEM;
999
1000 index = get_netdev_queue_index(queue);
1001
1002 rcu_read_lock();
1003 dev_maps = rcu_dereference(dev->xps_maps);
1004 if (dev_maps) {
1005 for_each_possible_cpu(i) {
1006 struct xps_map *map =
1007 rcu_dereference(dev_maps->cpu_map[i]);
1008 if (map) {
1009 int j;
1010 for (j = 0; j < map->len; j++) {
1011 if (map->queues[j] == index) {
1012 cpumask_set_cpu(i, mask);
1013 break;
1014 }
1015 }
1016 }
1017 }
1018 }
1019 rcu_read_unlock();
1020
1021 len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
1022 if (PAGE_SIZE - len < 3) {
1023 free_cpumask_var(mask);
1024 return -EINVAL;
1025 }
1026
1027 free_cpumask_var(mask);
1028 len += sprintf(buf + len, "\n");
1029 return len;
1030}
1031
Tom Herbert1d24eb42010-11-21 13:17:27 +00001032static DEFINE_MUTEX(xps_map_mutex);
Eric Dumazeta4177862010-11-28 21:43:02 +00001033#define xmap_dereference(P) \
1034 rcu_dereference_protected((P), lockdep_is_held(&xps_map_mutex))
Tom Herbert1d24eb42010-11-21 13:17:27 +00001035
Tom Herbert927fbec2011-11-28 16:33:02 +00001036static void xps_queue_release(struct netdev_queue *queue)
1037{
1038 struct net_device *dev = queue->dev;
1039 struct xps_dev_maps *dev_maps;
1040 struct xps_map *map;
1041 unsigned long index;
1042 int i, pos, nonempty = 0;
1043
1044 index = get_netdev_queue_index(queue);
1045
1046 mutex_lock(&xps_map_mutex);
1047 dev_maps = xmap_dereference(dev->xps_maps);
1048
1049 if (dev_maps) {
1050 for_each_possible_cpu(i) {
1051 map = xmap_dereference(dev_maps->cpu_map[i]);
1052 if (!map)
1053 continue;
1054
1055 for (pos = 0; pos < map->len; pos++)
1056 if (map->queues[pos] == index)
1057 break;
1058
1059 if (pos < map->len) {
1060 if (map->len > 1)
1061 map->queues[pos] =
1062 map->queues[--map->len];
1063 else {
1064 RCU_INIT_POINTER(dev_maps->cpu_map[i],
1065 NULL);
1066 kfree_rcu(map, rcu);
1067 map = NULL;
1068 }
1069 }
1070 if (map)
1071 nonempty = 1;
1072 }
1073
1074 if (!nonempty) {
1075 RCU_INIT_POINTER(dev->xps_maps, NULL);
1076 kfree_rcu(dev_maps, rcu);
1077 }
1078 }
1079 mutex_unlock(&xps_map_mutex);
1080}
1081
Tom Herbert1d24eb42010-11-21 13:17:27 +00001082static ssize_t store_xps_map(struct netdev_queue *queue,
1083 struct netdev_queue_attribute *attribute,
1084 const char *buf, size_t len)
1085{
1086 struct net_device *dev = queue->dev;
1087 cpumask_var_t mask;
1088 int err, i, cpu, pos, map_len, alloc_len, need_set;
1089 unsigned long index;
1090 struct xps_map *map, *new_map;
1091 struct xps_dev_maps *dev_maps, *new_dev_maps;
1092 int nonempty = 0;
david decotigny19b05f82011-11-16 12:15:08 +00001093 int numa_node_id = -2;
Tom Herbert1d24eb42010-11-21 13:17:27 +00001094
1095 if (!capable(CAP_NET_ADMIN))
1096 return -EPERM;
1097
1098 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
1099 return -ENOMEM;
1100
1101 index = get_netdev_queue_index(queue);
1102
1103 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
1104 if (err) {
1105 free_cpumask_var(mask);
1106 return err;
1107 }
1108
Eric Dumazet95c96172012-04-15 05:58:06 +00001109 new_dev_maps = kzalloc(max_t(unsigned int,
Tom Herbert1d24eb42010-11-21 13:17:27 +00001110 XPS_DEV_MAPS_SIZE, L1_CACHE_BYTES), GFP_KERNEL);
1111 if (!new_dev_maps) {
1112 free_cpumask_var(mask);
1113 return -ENOMEM;
1114 }
1115
1116 mutex_lock(&xps_map_mutex);
1117
Eric Dumazeta4177862010-11-28 21:43:02 +00001118 dev_maps = xmap_dereference(dev->xps_maps);
Tom Herbert1d24eb42010-11-21 13:17:27 +00001119
1120 for_each_possible_cpu(cpu) {
Eric Dumazeta4177862010-11-28 21:43:02 +00001121 map = dev_maps ?
1122 xmap_dereference(dev_maps->cpu_map[cpu]) : NULL;
1123 new_map = map;
Tom Herbert1d24eb42010-11-21 13:17:27 +00001124 if (map) {
1125 for (pos = 0; pos < map->len; pos++)
1126 if (map->queues[pos] == index)
1127 break;
1128 map_len = map->len;
1129 alloc_len = map->alloc_len;
1130 } else
1131 pos = map_len = alloc_len = 0;
1132
KOSAKI Motohiro2142c132011-05-16 11:53:49 -07001133 need_set = cpumask_test_cpu(cpu, mask) && cpu_online(cpu);
Eric Dumazetf2cd2d32010-11-29 08:14:37 +00001134#ifdef CONFIG_NUMA
1135 if (need_set) {
david decotigny19b05f82011-11-16 12:15:08 +00001136 if (numa_node_id == -2)
1137 numa_node_id = cpu_to_node(cpu);
1138 else if (numa_node_id != cpu_to_node(cpu))
1139 numa_node_id = -1;
Eric Dumazetf2cd2d32010-11-29 08:14:37 +00001140 }
1141#endif
Tom Herbert1d24eb42010-11-21 13:17:27 +00001142 if (need_set && pos >= map_len) {
1143 /* Need to add queue to this CPU's map */
1144 if (map_len >= alloc_len) {
1145 alloc_len = alloc_len ?
1146 2 * alloc_len : XPS_MIN_MAP_ALLOC;
Eric Dumazetb02038a2010-11-28 05:43:24 +00001147 new_map = kzalloc_node(XPS_MAP_SIZE(alloc_len),
1148 GFP_KERNEL,
1149 cpu_to_node(cpu));
Tom Herbert1d24eb42010-11-21 13:17:27 +00001150 if (!new_map)
1151 goto error;
1152 new_map->alloc_len = alloc_len;
1153 for (i = 0; i < map_len; i++)
1154 new_map->queues[i] = map->queues[i];
1155 new_map->len = map_len;
1156 }
1157 new_map->queues[new_map->len++] = index;
1158 } else if (!need_set && pos < map_len) {
1159 /* Need to remove queue from this CPU's map */
1160 if (map_len > 1)
1161 new_map->queues[pos] =
1162 new_map->queues[--new_map->len];
1163 else
1164 new_map = NULL;
1165 }
Eric Dumazeta4177862010-11-28 21:43:02 +00001166 RCU_INIT_POINTER(new_dev_maps->cpu_map[cpu], new_map);
Tom Herbert1d24eb42010-11-21 13:17:27 +00001167 }
1168
1169 /* Cleanup old maps */
1170 for_each_possible_cpu(cpu) {
Eric Dumazeta4177862010-11-28 21:43:02 +00001171 map = dev_maps ?
1172 xmap_dereference(dev_maps->cpu_map[cpu]) : NULL;
1173 if (map && xmap_dereference(new_dev_maps->cpu_map[cpu]) != map)
Lai Jiangshanedc86d82011-03-18 12:02:20 +08001174 kfree_rcu(map, rcu);
Tom Herbert1d24eb42010-11-21 13:17:27 +00001175 if (new_dev_maps->cpu_map[cpu])
1176 nonempty = 1;
1177 }
1178
Eric Dumazetcf778b02012-01-12 04:41:32 +00001179 if (nonempty) {
1180 rcu_assign_pointer(dev->xps_maps, new_dev_maps);
1181 } else {
Tom Herbert1d24eb42010-11-21 13:17:27 +00001182 kfree(new_dev_maps);
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00001183 RCU_INIT_POINTER(dev->xps_maps, NULL);
Tom Herbert1d24eb42010-11-21 13:17:27 +00001184 }
1185
1186 if (dev_maps)
Lai Jiangshanb55071e2011-03-18 12:02:47 +08001187 kfree_rcu(dev_maps, rcu);
Tom Herbert1d24eb42010-11-21 13:17:27 +00001188
david decotigny19b05f82011-11-16 12:15:08 +00001189 netdev_queue_numa_node_write(queue, (numa_node_id >= 0) ? numa_node_id :
Changli Gaob236da62010-12-14 03:09:15 +00001190 NUMA_NO_NODE);
Eric Dumazetf2cd2d32010-11-29 08:14:37 +00001191
Tom Herbert1d24eb42010-11-21 13:17:27 +00001192 mutex_unlock(&xps_map_mutex);
1193
1194 free_cpumask_var(mask);
1195 return len;
1196
1197error:
1198 mutex_unlock(&xps_map_mutex);
1199
1200 if (new_dev_maps)
1201 for_each_possible_cpu(i)
Eric Dumazeta4177862010-11-28 21:43:02 +00001202 kfree(rcu_dereference_protected(
1203 new_dev_maps->cpu_map[i],
1204 1));
Tom Herbert1d24eb42010-11-21 13:17:27 +00001205 kfree(new_dev_maps);
1206 free_cpumask_var(mask);
1207 return -ENOMEM;
1208}
1209
1210static struct netdev_queue_attribute xps_cpus_attribute =
1211 __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map);
david decotignyccf5ff62011-11-16 12:15:10 +00001212#endif /* CONFIG_XPS */
Tom Herbert1d24eb42010-11-21 13:17:27 +00001213
1214static struct attribute *netdev_queue_default_attrs[] = {
david decotignyccf5ff62011-11-16 12:15:10 +00001215 &queue_trans_timeout.attr,
1216#ifdef CONFIG_XPS
Tom Herbert1d24eb42010-11-21 13:17:27 +00001217 &xps_cpus_attribute.attr,
david decotignyccf5ff62011-11-16 12:15:10 +00001218#endif
Tom Herbert1d24eb42010-11-21 13:17:27 +00001219 NULL
1220};
1221
1222static void netdev_queue_release(struct kobject *kobj)
1223{
1224 struct netdev_queue *queue = to_netdev_queue(kobj);
Tom Herbert1d24eb42010-11-21 13:17:27 +00001225
Tom Herbert114cf582011-11-28 16:33:09 +00001226#ifdef CONFIG_XPS
Tom Herbert927fbec2011-11-28 16:33:02 +00001227 xps_queue_release(queue);
Tom Herbert114cf582011-11-28 16:33:09 +00001228#endif
Tom Herbert1d24eb42010-11-21 13:17:27 +00001229
1230 memset(kobj, 0, sizeof(*kobj));
1231 dev_put(queue->dev);
1232}
1233
1234static struct kobj_type netdev_queue_ktype = {
1235 .sysfs_ops = &netdev_queue_sysfs_ops,
1236 .release = netdev_queue_release,
1237 .default_attrs = netdev_queue_default_attrs,
1238};
1239
1240static int netdev_queue_add_kobject(struct net_device *net, int index)
1241{
1242 struct netdev_queue *queue = net->_tx + index;
1243 struct kobject *kobj = &queue->kobj;
1244 int error = 0;
1245
1246 kobj->kset = net->queues_kset;
1247 error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL,
1248 "tx-%u", index);
Tom Herbert114cf582011-11-28 16:33:09 +00001249 if (error)
1250 goto exit;
1251
1252#ifdef CONFIG_BQL
1253 error = sysfs_create_group(kobj, &dql_group);
1254 if (error)
1255 goto exit;
1256#endif
Tom Herbert1d24eb42010-11-21 13:17:27 +00001257
1258 kobject_uevent(kobj, KOBJ_ADD);
1259 dev_hold(queue->dev);
1260
Tom Herbert114cf582011-11-28 16:33:09 +00001261 return 0;
1262exit:
1263 kobject_put(kobj);
Tom Herbert1d24eb42010-11-21 13:17:27 +00001264 return error;
1265}
david decotignyccf5ff62011-11-16 12:15:10 +00001266#endif /* CONFIG_SYSFS */
Tom Herbert1d24eb42010-11-21 13:17:27 +00001267
1268int
1269netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
1270{
david decotignyccf5ff62011-11-16 12:15:10 +00001271#ifdef CONFIG_SYSFS
Tom Herbert1d24eb42010-11-21 13:17:27 +00001272 int i;
1273 int error = 0;
1274
1275 for (i = old_num; i < new_num; i++) {
1276 error = netdev_queue_add_kobject(net, i);
1277 if (error) {
1278 new_num = old_num;
1279 break;
1280 }
1281 }
1282
Tom Herbert114cf582011-11-28 16:33:09 +00001283 while (--i >= new_num) {
1284 struct netdev_queue *queue = net->_tx + i;
1285
1286#ifdef CONFIG_BQL
1287 sysfs_remove_group(&queue->kobj, &dql_group);
1288#endif
1289 kobject_put(&queue->kobj);
1290 }
Tom Herbert1d24eb42010-11-21 13:17:27 +00001291
1292 return error;
Tom Herbertbf264142010-11-26 08:36:09 +00001293#else
1294 return 0;
david decotignyccf5ff62011-11-16 12:15:10 +00001295#endif /* CONFIG_SYSFS */
Tom Herbert1d24eb42010-11-21 13:17:27 +00001296}
1297
1298static int register_queue_kobjects(struct net_device *net)
1299{
Tom Herbertbf264142010-11-26 08:36:09 +00001300 int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0;
Tom Herbert1d24eb42010-11-21 13:17:27 +00001301
david decotignyccf5ff62011-11-16 12:15:10 +00001302#ifdef CONFIG_SYSFS
Ben Hutchings62fe0b42010-09-27 08:24:33 +00001303 net->queues_kset = kset_create_and_add("queues",
1304 NULL, &net->dev.kobj);
1305 if (!net->queues_kset)
1306 return -ENOMEM;
Tom Herbertbf264142010-11-26 08:36:09 +00001307#endif
Tom Herbert1d24eb42010-11-21 13:17:27 +00001308
Tom Herbertbf264142010-11-26 08:36:09 +00001309#ifdef CONFIG_RPS
1310 real_rx = net->real_num_rx_queues;
1311#endif
1312 real_tx = net->real_num_tx_queues;
1313
1314 error = net_rx_queue_update_kobjects(net, 0, real_rx);
Tom Herbert1d24eb42010-11-21 13:17:27 +00001315 if (error)
1316 goto error;
Tom Herbertbf264142010-11-26 08:36:09 +00001317 rxq = real_rx;
Tom Herbert1d24eb42010-11-21 13:17:27 +00001318
Tom Herbertbf264142010-11-26 08:36:09 +00001319 error = netdev_queue_update_kobjects(net, 0, real_tx);
Tom Herbert1d24eb42010-11-21 13:17:27 +00001320 if (error)
1321 goto error;
Tom Herbertbf264142010-11-26 08:36:09 +00001322 txq = real_tx;
Tom Herbert1d24eb42010-11-21 13:17:27 +00001323
1324 return 0;
1325
1326error:
1327 netdev_queue_update_kobjects(net, txq, 0);
1328 net_rx_queue_update_kobjects(net, rxq, 0);
1329 return error;
Ben Hutchings62fe0b42010-09-27 08:24:33 +00001330}
1331
Tom Herbert1d24eb42010-11-21 13:17:27 +00001332static void remove_queue_kobjects(struct net_device *net)
Tom Herbert0a9627f2010-03-16 08:03:29 +00001333{
Tom Herbertbf264142010-11-26 08:36:09 +00001334 int real_rx = 0, real_tx = 0;
1335
1336#ifdef CONFIG_RPS
1337 real_rx = net->real_num_rx_queues;
1338#endif
1339 real_tx = net->real_num_tx_queues;
1340
1341 net_rx_queue_update_kobjects(net, real_rx, 0);
1342 netdev_queue_update_kobjects(net, real_tx, 0);
david decotignyccf5ff62011-11-16 12:15:10 +00001343#ifdef CONFIG_SYSFS
Tom Herbert0a9627f2010-03-16 08:03:29 +00001344 kset_unregister(net->queues_kset);
Tom Herbertbf264142010-11-26 08:36:09 +00001345#endif
Tom Herbert0a9627f2010-03-16 08:03:29 +00001346}
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001347
Al Viroa685e082011-06-08 21:13:01 -04001348static void *net_grab_current_ns(void)
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001349{
Al Viroa685e082011-06-08 21:13:01 -04001350 struct net *ns = current->nsproxy->net_ns;
1351#ifdef CONFIG_NET_NS
1352 if (ns)
1353 atomic_inc(&ns->passive);
1354#endif
1355 return ns;
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001356}
1357
1358static const void *net_initial_ns(void)
1359{
1360 return &init_net;
1361}
1362
1363static const void *net_netlink_ns(struct sock *sk)
1364{
1365 return sock_net(sk);
1366}
1367
Johannes Berg04600792010-08-05 17:45:15 +02001368struct kobj_ns_type_operations net_ns_type_operations = {
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001369 .type = KOBJ_NS_TYPE_NET,
Al Viroa685e082011-06-08 21:13:01 -04001370 .grab_current_ns = net_grab_current_ns,
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001371 .netlink_ns = net_netlink_ns,
1372 .initial_ns = net_initial_ns,
Al Viroa685e082011-06-08 21:13:01 -04001373 .drop_ns = net_drop_ns,
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001374};
Johannes Berg04600792010-08-05 17:45:15 +02001375EXPORT_SYMBOL_GPL(net_ns_type_operations);
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001376
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377#ifdef CONFIG_HOTPLUG
Kay Sievers7eff2e72007-08-14 15:15:12 +02001378static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001380 struct net_device *dev = to_net_dev(d);
Kay Sievers7eff2e72007-08-14 15:15:12 +02001381 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382
Kay Sievers312c0042005-11-16 09:00:00 +01001383 /* pass interface to uevent. */
Kay Sievers7eff2e72007-08-14 15:15:12 +02001384 retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
Eric Rannaudbf624562007-03-30 22:23:12 -07001385 if (retval)
1386 goto exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387
Jean Tourrilhesca2f37d2007-03-07 10:49:30 -08001388 /* pass ifindex to uevent.
1389 * ifindex is useful as it won't change (interface name may change)
1390 * and is what RtNetlink uses natively. */
Kay Sievers7eff2e72007-08-14 15:15:12 +02001391 retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
Jean Tourrilhesca2f37d2007-03-07 10:49:30 -08001392
Eric Rannaudbf624562007-03-30 22:23:12 -07001393exit:
Eric Rannaudbf624562007-03-30 22:23:12 -07001394 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395}
1396#endif
1397
1398/*
YOSHIFUJI Hideaki4ec93ed2007-02-09 23:24:36 +09001399 * netdev_release -- destroy and free a dead device.
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001400 * Called when last reference to device kobject is gone.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001402static void netdev_release(struct device *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001404 struct net_device *dev = to_net_dev(d);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405
1406 BUG_ON(dev->reg_state != NETREG_RELEASED);
1407
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001408 kfree(dev->ifalias);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409 kfree((char *)dev - dev->padded);
1410}
1411
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001412static const void *net_namespace(struct device *d)
1413{
1414 struct net_device *dev;
1415 dev = container_of(d, struct net_device, dev);
1416 return dev_net(dev);
1417}
1418
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419static struct class net_class = {
1420 .name = "net",
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001421 .dev_release = netdev_release,
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001422#ifdef CONFIG_SYSFS
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001423 .dev_attrs = net_class_attributes,
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001424#endif /* CONFIG_SYSFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425#ifdef CONFIG_HOTPLUG
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001426 .dev_uevent = netdev_uevent,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427#endif
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001428 .ns_type = &net_ns_type_operations,
1429 .namespace = net_namespace,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430};
1431
Stephen Hemminger9093bbb2007-05-19 15:39:25 -07001432/* Delete sysfs entries but hold kobject reference until after all
1433 * netdev references are gone.
1434 */
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001435void netdev_unregister_kobject(struct net_device * net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436{
Stephen Hemminger9093bbb2007-05-19 15:39:25 -07001437 struct device *dev = &(net->dev);
1438
1439 kobject_get(&dev->kobj);
Eric W. Biederman38918452008-10-27 17:51:47 -07001440
Tom Herbert1d24eb42010-11-21 13:17:27 +00001441 remove_queue_kobjects(net);
Tom Herbert0a9627f2010-03-16 08:03:29 +00001442
Stephen Hemminger9093bbb2007-05-19 15:39:25 -07001443 device_del(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444}
1445
1446/* Create sysfs entries for network device. */
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001447int netdev_register_kobject(struct net_device *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001449 struct device *dev = &(net->dev);
David Brownella4dbd672009-06-24 10:06:31 -07001450 const struct attribute_group **groups = net->sysfs_groups;
Tom Herbert0a9627f2010-03-16 08:03:29 +00001451 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452
Eric W. Biedermana1b3f592010-05-04 17:36:49 -07001453 device_initialize(dev);
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001454 dev->class = &net_class;
1455 dev->platform_data = net;
1456 dev->groups = groups;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457
Stephen Hemmingera2205472009-03-09 13:51:55 +00001458 dev_set_name(dev, "%s", net->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001460#ifdef CONFIG_SYSFS
Eric W. Biederman0c509a62009-10-29 14:18:21 +00001461 /* Allow for a device specific group */
1462 if (*groups)
1463 groups++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464
Eric W. Biederman0c509a62009-10-29 14:18:21 +00001465 *groups++ = &netstat_group;
Johannes Berg22bb1be2008-07-10 11:16:47 +02001466#ifdef CONFIG_WIRELESS_EXT_SYSFS
Johannes Berg3d23e342009-09-29 23:27:28 +02001467 if (net->ieee80211_ptr)
Stephen Hemmingerfe9925b2006-05-06 17:56:03 -07001468 *groups++ = &wireless_group;
Johannes Berg3d23e342009-09-29 23:27:28 +02001469#ifdef CONFIG_WIRELESS_EXT
1470 else if (net->wireless_handlers)
1471 *groups++ = &wireless_group;
1472#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473#endif
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001474#endif /* CONFIG_SYSFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475
Tom Herbert0a9627f2010-03-16 08:03:29 +00001476 error = device_add(dev);
1477 if (error)
1478 return error;
1479
Tom Herbert1d24eb42010-11-21 13:17:27 +00001480 error = register_queue_kobjects(net);
Tom Herbert0a9627f2010-03-16 08:03:29 +00001481 if (error) {
1482 device_del(dev);
1483 return error;
1484 }
1485
1486 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487}
1488
Jay Vosburghb8a97872008-06-13 18:12:04 -07001489int netdev_class_create_file(struct class_attribute *class_attr)
1490{
1491 return class_create_file(&net_class, class_attr);
1492}
Eric Dumazet9e34a5b2010-07-09 21:22:04 +00001493EXPORT_SYMBOL(netdev_class_create_file);
Jay Vosburghb8a97872008-06-13 18:12:04 -07001494
1495void netdev_class_remove_file(struct class_attribute *class_attr)
1496{
1497 class_remove_file(&net_class, class_attr);
1498}
Jay Vosburghb8a97872008-06-13 18:12:04 -07001499EXPORT_SYMBOL(netdev_class_remove_file);
1500
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001501int netdev_kobject_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502{
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001503 kobj_ns_type_register(&net_ns_type_operations);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504 return class_register(&net_class);
1505}