blob: c410f2854c8955c350ba640812a558615df83eb2 [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);
Michał Mirosław04ed3e72011-01-24 15:32:47 -0800102NETDEVICE_SHOW(features, fmt_hex);
Kay Sieversfd586ba2005-12-19 01:42:56 +0100103NETDEVICE_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
Vlad Dogarua512b922011-01-24 03:37:29 +0000298NETDEVICE_SHOW(group, fmt_dec);
299
300static int change_group(struct net_device *net, unsigned long new_group)
301{
302 dev_set_group(net, (int) new_group);
303 return 0;
304}
305
306static ssize_t store_group(struct device *dev, struct device_attribute *attr,
307 const char *buf, size_t len)
308{
309 return netdev_store(dev, attr, buf, len, change_group);
310}
311
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700312static struct device_attribute net_class_attributes[] = {
Stefan Assmannc1f79422010-07-22 02:50:21 +0000313 __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100314 __ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
David Woodhouse9d296722008-04-20 16:07:43 -0700315 __ATTR(dev_id, S_IRUGO, show_dev_id, NULL),
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700316 __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100317 __ATTR(iflink, S_IRUGO, show_iflink, NULL),
318 __ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
319 __ATTR(features, S_IRUGO, show_features, NULL),
320 __ATTR(type, S_IRUGO, show_type, NULL),
Stefan Rompfb00055a2006-03-20 17:09:11 -0800321 __ATTR(link_mode, S_IRUGO, show_link_mode, NULL),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100322 __ATTR(address, S_IRUGO, show_address, NULL),
323 __ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
324 __ATTR(carrier, S_IRUGO, show_carrier, NULL),
Andy Gospodarekd519e172009-10-02 09:26:12 +0000325 __ATTR(speed, S_IRUGO, show_speed, NULL),
326 __ATTR(duplex, S_IRUGO, show_duplex, NULL),
Stefan Rompfb00055a2006-03-20 17:09:11 -0800327 __ATTR(dormant, S_IRUGO, show_dormant, NULL),
328 __ATTR(operstate, S_IRUGO, show_operstate, NULL),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100329 __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu),
330 __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags),
331 __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
332 store_tx_queue_len),
Xiaotian Fengb6644cb2011-02-09 19:16:15 -0800333 __ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group),
Kay Sieversfd586ba2005-12-19 01:42:56 +0100334 {}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335};
336
337/* Show a given an attribute in the statistics group */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700338static ssize_t netstat_show(const struct device *d,
339 struct device_attribute *attr, char *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 unsigned long offset)
341{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700342 struct net_device *dev = to_net_dev(d);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 ssize_t ret = -EINVAL;
344
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000345 WARN_ON(offset > sizeof(struct rtnl_link_stats64) ||
346 offset % sizeof(u64) != 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
348 read_lock(&dev_base_lock);
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700349 if (dev_isalive(dev)) {
Eric Dumazet28172732010-07-07 14:58:56 -0700350 struct rtnl_link_stats64 temp;
351 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
352
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000353 ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset));
Pavel Emelyanov96e74082008-05-21 14:12:46 -0700354 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 read_unlock(&dev_base_lock);
356 return ret;
357}
358
359/* generate a read-only statistics attribute */
360#define NETSTAT_ENTRY(name) \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700361static ssize_t show_##name(struct device *d, \
362 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363{ \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700364 return netstat_show(d, attr, buf, \
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000365 offsetof(struct rtnl_link_stats64, name)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366} \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700367static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
369NETSTAT_ENTRY(rx_packets);
370NETSTAT_ENTRY(tx_packets);
371NETSTAT_ENTRY(rx_bytes);
372NETSTAT_ENTRY(tx_bytes);
373NETSTAT_ENTRY(rx_errors);
374NETSTAT_ENTRY(tx_errors);
375NETSTAT_ENTRY(rx_dropped);
376NETSTAT_ENTRY(tx_dropped);
377NETSTAT_ENTRY(multicast);
378NETSTAT_ENTRY(collisions);
379NETSTAT_ENTRY(rx_length_errors);
380NETSTAT_ENTRY(rx_over_errors);
381NETSTAT_ENTRY(rx_crc_errors);
382NETSTAT_ENTRY(rx_frame_errors);
383NETSTAT_ENTRY(rx_fifo_errors);
384NETSTAT_ENTRY(rx_missed_errors);
385NETSTAT_ENTRY(tx_aborted_errors);
386NETSTAT_ENTRY(tx_carrier_errors);
387NETSTAT_ENTRY(tx_fifo_errors);
388NETSTAT_ENTRY(tx_heartbeat_errors);
389NETSTAT_ENTRY(tx_window_errors);
390NETSTAT_ENTRY(rx_compressed);
391NETSTAT_ENTRY(tx_compressed);
392
393static struct attribute *netstat_attrs[] = {
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700394 &dev_attr_rx_packets.attr,
395 &dev_attr_tx_packets.attr,
396 &dev_attr_rx_bytes.attr,
397 &dev_attr_tx_bytes.attr,
398 &dev_attr_rx_errors.attr,
399 &dev_attr_tx_errors.attr,
400 &dev_attr_rx_dropped.attr,
401 &dev_attr_tx_dropped.attr,
402 &dev_attr_multicast.attr,
403 &dev_attr_collisions.attr,
404 &dev_attr_rx_length_errors.attr,
405 &dev_attr_rx_over_errors.attr,
406 &dev_attr_rx_crc_errors.attr,
407 &dev_attr_rx_frame_errors.attr,
408 &dev_attr_rx_fifo_errors.attr,
409 &dev_attr_rx_missed_errors.attr,
410 &dev_attr_tx_aborted_errors.attr,
411 &dev_attr_tx_carrier_errors.attr,
412 &dev_attr_tx_fifo_errors.attr,
413 &dev_attr_tx_heartbeat_errors.attr,
414 &dev_attr_tx_window_errors.attr,
415 &dev_attr_rx_compressed.attr,
416 &dev_attr_tx_compressed.attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 NULL
418};
419
420
421static struct attribute_group netstat_group = {
422 .name = "statistics",
423 .attrs = netstat_attrs,
424};
425
Johannes Berg22bb1be2008-07-10 11:16:47 +0200426#ifdef CONFIG_WIRELESS_EXT_SYSFS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427/* helper function that does all the locking etc for wireless stats */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700428static ssize_t wireless_show(struct device *d, char *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 ssize_t (*format)(const struct iw_statistics *,
430 char *))
431{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700432 struct net_device *dev = to_net_dev(d);
Johannes Berg8f1546c2009-09-28 15:26:43 +0200433 const struct iw_statistics *iw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 ssize_t ret = -EINVAL;
YOSHIFUJI Hideaki4ec93ed2007-02-09 23:24:36 +0900435
Eric W. Biedermanb8afe642010-02-19 13:23:47 +0000436 if (!rtnl_trylock())
437 return restart_syscall();
Andrey Borzenkov6dd214b2006-01-09 20:51:28 -0800438 if (dev_isalive(dev)) {
Johannes Berg8f1546c2009-09-28 15:26:43 +0200439 iw = get_wireless_stats(dev);
440 if (iw)
Andrey Borzenkov6dd214b2006-01-09 20:51:28 -0800441 ret = (*format)(iw, buf);
442 }
Johannes Berga160ee62009-10-05 02:22:23 -0700443 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
445 return ret;
446}
447
448/* show function template for wireless fields */
449#define WIRELESS_SHOW(name, field, format_string) \
450static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \
451{ \
452 return sprintf(buf, format_string, iw->field); \
453} \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700454static ssize_t show_iw_##name(struct device *d, \
455 struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456{ \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700457 return wireless_show(d, buf, format_iw_##name); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458} \
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700459static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
461WIRELESS_SHOW(status, status, fmt_hex);
462WIRELESS_SHOW(link, qual.qual, fmt_dec);
463WIRELESS_SHOW(level, qual.level, fmt_dec);
464WIRELESS_SHOW(noise, qual.noise, fmt_dec);
465WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
466WIRELESS_SHOW(crypt, discard.code, fmt_dec);
467WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
468WIRELESS_SHOW(misc, discard.misc, fmt_dec);
469WIRELESS_SHOW(retries, discard.retries, fmt_dec);
470WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
471
472static struct attribute *wireless_attrs[] = {
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700473 &dev_attr_status.attr,
474 &dev_attr_link.attr,
475 &dev_attr_level.attr,
476 &dev_attr_noise.attr,
477 &dev_attr_nwid.attr,
478 &dev_attr_crypt.attr,
479 &dev_attr_fragment.attr,
480 &dev_attr_retries.attr,
481 &dev_attr_misc.attr,
482 &dev_attr_beacon.attr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 NULL
484};
485
486static struct attribute_group wireless_group = {
487 .name = "wireless",
488 .attrs = wireless_attrs,
489};
490#endif
Eric W. Biedermand6523dd2010-05-16 21:59:45 -0700491#endif /* CONFIG_SYSFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
Stephen Rothwell30bde1f2010-03-29 01:00:44 -0700493#ifdef CONFIG_RPS
Tom Herbert0a9627f2010-03-16 08:03:29 +0000494/*
495 * RX queue sysfs structures and functions.
496 */
497struct rx_queue_attribute {
498 struct attribute attr;
499 ssize_t (*show)(struct netdev_rx_queue *queue,
500 struct rx_queue_attribute *attr, char *buf);
501 ssize_t (*store)(struct netdev_rx_queue *queue,
502 struct rx_queue_attribute *attr, const char *buf, size_t len);
503};
504#define to_rx_queue_attr(_attr) container_of(_attr, \
505 struct rx_queue_attribute, attr)
506
507#define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj)
508
509static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr,
510 char *buf)
511{
512 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
513 struct netdev_rx_queue *queue = to_rx_queue(kobj);
514
515 if (!attribute->show)
516 return -EIO;
517
518 return attribute->show(queue, attribute, buf);
519}
520
521static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr,
522 const char *buf, size_t count)
523{
524 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
525 struct netdev_rx_queue *queue = to_rx_queue(kobj);
526
527 if (!attribute->store)
528 return -EIO;
529
530 return attribute->store(queue, attribute, buf, count);
531}
532
stephen hemmingerfa50d642010-08-31 12:14:13 +0000533static const struct sysfs_ops rx_queue_sysfs_ops = {
Tom Herbert0a9627f2010-03-16 08:03:29 +0000534 .show = rx_queue_attr_show,
535 .store = rx_queue_attr_store,
536};
537
538static ssize_t show_rps_map(struct netdev_rx_queue *queue,
539 struct rx_queue_attribute *attribute, char *buf)
540{
541 struct rps_map *map;
542 cpumask_var_t mask;
543 size_t len = 0;
544 int i;
545
546 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
547 return -ENOMEM;
548
549 rcu_read_lock();
550 map = rcu_dereference(queue->rps_map);
551 if (map)
552 for (i = 0; i < map->len; i++)
553 cpumask_set_cpu(map->cpus[i], mask);
554
555 len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
556 if (PAGE_SIZE - len < 3) {
557 rcu_read_unlock();
558 free_cpumask_var(mask);
559 return -EINVAL;
560 }
561 rcu_read_unlock();
562
563 free_cpumask_var(mask);
564 len += sprintf(buf + len, "\n");
565 return len;
566}
567
Eric Dumazetf5acb902010-04-19 14:40:57 -0700568static ssize_t store_rps_map(struct netdev_rx_queue *queue,
Tom Herbert0a9627f2010-03-16 08:03:29 +0000569 struct rx_queue_attribute *attribute,
570 const char *buf, size_t len)
571{
572 struct rps_map *old_map, *map;
573 cpumask_var_t mask;
574 int err, cpu, i;
575 static DEFINE_SPINLOCK(rps_map_lock);
576
577 if (!capable(CAP_NET_ADMIN))
578 return -EPERM;
579
580 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
581 return -ENOMEM;
582
583 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
584 if (err) {
585 free_cpumask_var(mask);
586 return err;
587 }
588
589 map = kzalloc(max_t(unsigned,
590 RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES),
591 GFP_KERNEL);
592 if (!map) {
593 free_cpumask_var(mask);
594 return -ENOMEM;
595 }
596
597 i = 0;
598 for_each_cpu_and(cpu, mask, cpu_online_mask)
599 map->cpus[i++] = cpu;
600
601 if (i)
602 map->len = i;
603 else {
604 kfree(map);
605 map = NULL;
606 }
607
608 spin_lock(&rps_map_lock);
Eric Dumazet6e3f7fa2010-10-25 03:02:02 +0000609 old_map = rcu_dereference_protected(queue->rps_map,
610 lockdep_is_held(&rps_map_lock));
Tom Herbert0a9627f2010-03-16 08:03:29 +0000611 rcu_assign_pointer(queue->rps_map, map);
612 spin_unlock(&rps_map_lock);
613
614 if (old_map)
Lai Jiangshanf6f80232011-03-18 12:01:31 +0800615 kfree_rcu(old_map, rcu);
Tom Herbert0a9627f2010-03-16 08:03:29 +0000616
617 free_cpumask_var(mask);
618 return len;
619}
620
Tom Herbertfec5e652010-04-16 16:01:27 -0700621static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
622 struct rx_queue_attribute *attr,
623 char *buf)
624{
625 struct rps_dev_flow_table *flow_table;
626 unsigned int val = 0;
627
628 rcu_read_lock();
629 flow_table = rcu_dereference(queue->rps_flow_table);
630 if (flow_table)
631 val = flow_table->mask + 1;
632 rcu_read_unlock();
633
634 return sprintf(buf, "%u\n", val);
635}
636
637static void rps_dev_flow_table_release_work(struct work_struct *work)
638{
639 struct rps_dev_flow_table *table = container_of(work,
640 struct rps_dev_flow_table, free_work);
641
642 vfree(table);
643}
644
645static void rps_dev_flow_table_release(struct rcu_head *rcu)
646{
647 struct rps_dev_flow_table *table = container_of(rcu,
648 struct rps_dev_flow_table, rcu);
649
650 INIT_WORK(&table->free_work, rps_dev_flow_table_release_work);
651 schedule_work(&table->free_work);
652}
653
Eric Dumazetf5acb902010-04-19 14:40:57 -0700654static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
Tom Herbertfec5e652010-04-16 16:01:27 -0700655 struct rx_queue_attribute *attr,
656 const char *buf, size_t len)
657{
658 unsigned int count;
659 char *endp;
660 struct rps_dev_flow_table *table, *old_table;
661 static DEFINE_SPINLOCK(rps_dev_flow_lock);
662
663 if (!capable(CAP_NET_ADMIN))
664 return -EPERM;
665
666 count = simple_strtoul(buf, &endp, 0);
667 if (endp == buf)
668 return -EINVAL;
669
670 if (count) {
671 int i;
672
673 if (count > 1<<30) {
674 /* Enforce a limit to prevent overflow */
675 return -EINVAL;
676 }
677 count = roundup_pow_of_two(count);
678 table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count));
679 if (!table)
680 return -ENOMEM;
681
682 table->mask = count - 1;
683 for (i = 0; i < count; i++)
684 table->flows[i].cpu = RPS_NO_CPU;
685 } else
686 table = NULL;
687
688 spin_lock(&rps_dev_flow_lock);
Eric Dumazet6e3f7fa2010-10-25 03:02:02 +0000689 old_table = rcu_dereference_protected(queue->rps_flow_table,
690 lockdep_is_held(&rps_dev_flow_lock));
Tom Herbertfec5e652010-04-16 16:01:27 -0700691 rcu_assign_pointer(queue->rps_flow_table, table);
692 spin_unlock(&rps_dev_flow_lock);
693
694 if (old_table)
695 call_rcu(&old_table->rcu, rps_dev_flow_table_release);
696
697 return len;
698}
699
Tom Herbert0a9627f2010-03-16 08:03:29 +0000700static struct rx_queue_attribute rps_cpus_attribute =
701 __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map);
702
Tom Herbertfec5e652010-04-16 16:01:27 -0700703
704static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute =
705 __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR,
706 show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt);
707
Tom Herbert0a9627f2010-03-16 08:03:29 +0000708static struct attribute *rx_queue_default_attrs[] = {
709 &rps_cpus_attribute.attr,
Tom Herbertfec5e652010-04-16 16:01:27 -0700710 &rps_dev_flow_table_cnt_attribute.attr,
Tom Herbert0a9627f2010-03-16 08:03:29 +0000711 NULL
712};
713
714static void rx_queue_release(struct kobject *kobj)
715{
716 struct netdev_rx_queue *queue = to_rx_queue(kobj);
Eric Dumazet6e3f7fa2010-10-25 03:02:02 +0000717 struct rps_map *map;
718 struct rps_dev_flow_table *flow_table;
Tom Herbert0a9627f2010-03-16 08:03:29 +0000719
Tom Herbertfec5e652010-04-16 16:01:27 -0700720
Eric Dumazet6e3f7fa2010-10-25 03:02:02 +0000721 map = rcu_dereference_raw(queue->rps_map);
John Fastabend9ea19482010-11-16 06:31:39 +0000722 if (map) {
723 RCU_INIT_POINTER(queue->rps_map, NULL);
Lai Jiangshanf6f80232011-03-18 12:01:31 +0800724 kfree_rcu(map, rcu);
John Fastabend9ea19482010-11-16 06:31:39 +0000725 }
Eric Dumazet6e3f7fa2010-10-25 03:02:02 +0000726
727 flow_table = rcu_dereference_raw(queue->rps_flow_table);
John Fastabend9ea19482010-11-16 06:31:39 +0000728 if (flow_table) {
729 RCU_INIT_POINTER(queue->rps_flow_table, NULL);
Eric Dumazet6e3f7fa2010-10-25 03:02:02 +0000730 call_rcu(&flow_table->rcu, rps_dev_flow_table_release);
John Fastabend9ea19482010-11-16 06:31:39 +0000731 }
Tom Herbert0a9627f2010-03-16 08:03:29 +0000732
John Fastabend9ea19482010-11-16 06:31:39 +0000733 memset(kobj, 0, sizeof(*kobj));
Tom Herbertfe822242010-11-09 10:47:38 +0000734 dev_put(queue->dev);
Tom Herbert0a9627f2010-03-16 08:03:29 +0000735}
736
737static struct kobj_type rx_queue_ktype = {
738 .sysfs_ops = &rx_queue_sysfs_ops,
739 .release = rx_queue_release,
740 .default_attrs = rx_queue_default_attrs,
741};
742
743static int rx_queue_add_kobject(struct net_device *net, int index)
744{
745 struct netdev_rx_queue *queue = net->_rx + index;
746 struct kobject *kobj = &queue->kobj;
747 int error = 0;
748
749 kobj->kset = net->queues_kset;
750 error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
751 "rx-%u", index);
752 if (error) {
753 kobject_put(kobj);
754 return error;
755 }
756
757 kobject_uevent(kobj, KOBJ_ADD);
Tom Herbertfe822242010-11-09 10:47:38 +0000758 dev_hold(queue->dev);
Tom Herbert0a9627f2010-03-16 08:03:29 +0000759
760 return error;
761}
Tom Herbertbf264142010-11-26 08:36:09 +0000762#endif /* CONFIG_RPS */
Tom Herbert0a9627f2010-03-16 08:03:29 +0000763
Ben Hutchings62fe0b42010-09-27 08:24:33 +0000764int
765net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
Tom Herbert0a9627f2010-03-16 08:03:29 +0000766{
Tom Herbertbf264142010-11-26 08:36:09 +0000767#ifdef CONFIG_RPS
Tom Herbert0a9627f2010-03-16 08:03:29 +0000768 int i;
769 int error = 0;
770
Ben Hutchings62fe0b42010-09-27 08:24:33 +0000771 for (i = old_num; i < new_num; i++) {
Tom Herbert0a9627f2010-03-16 08:03:29 +0000772 error = rx_queue_add_kobject(net, i);
Ben Hutchings62fe0b42010-09-27 08:24:33 +0000773 if (error) {
774 new_num = old_num;
Tom Herbert0a9627f2010-03-16 08:03:29 +0000775 break;
Ben Hutchings62fe0b42010-09-27 08:24:33 +0000776 }
Tom Herbert0a9627f2010-03-16 08:03:29 +0000777 }
778
Ben Hutchings62fe0b42010-09-27 08:24:33 +0000779 while (--i >= new_num)
780 kobject_put(&net->_rx[i].kobj);
Tom Herbert0a9627f2010-03-16 08:03:29 +0000781
782 return error;
Tom Herbertbf264142010-11-26 08:36:09 +0000783#else
784 return 0;
785#endif
Tom Herbert0a9627f2010-03-16 08:03:29 +0000786}
787
Tom Herbertbf264142010-11-26 08:36:09 +0000788#ifdef CONFIG_XPS
Tom Herbert1d24eb42010-11-21 13:17:27 +0000789/*
790 * netdev_queue sysfs structures and functions.
791 */
792struct netdev_queue_attribute {
793 struct attribute attr;
794 ssize_t (*show)(struct netdev_queue *queue,
795 struct netdev_queue_attribute *attr, char *buf);
796 ssize_t (*store)(struct netdev_queue *queue,
797 struct netdev_queue_attribute *attr, const char *buf, size_t len);
798};
799#define to_netdev_queue_attr(_attr) container_of(_attr, \
800 struct netdev_queue_attribute, attr)
801
802#define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj)
803
804static ssize_t netdev_queue_attr_show(struct kobject *kobj,
805 struct attribute *attr, char *buf)
Ben Hutchings62fe0b42010-09-27 08:24:33 +0000806{
Tom Herbert1d24eb42010-11-21 13:17:27 +0000807 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
808 struct netdev_queue *queue = to_netdev_queue(kobj);
809
810 if (!attribute->show)
811 return -EIO;
812
813 return attribute->show(queue, attribute, buf);
814}
815
816static ssize_t netdev_queue_attr_store(struct kobject *kobj,
817 struct attribute *attr,
818 const char *buf, size_t count)
819{
820 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
821 struct netdev_queue *queue = to_netdev_queue(kobj);
822
823 if (!attribute->store)
824 return -EIO;
825
826 return attribute->store(queue, attribute, buf, count);
827}
828
829static const struct sysfs_ops netdev_queue_sysfs_ops = {
830 .show = netdev_queue_attr_show,
831 .store = netdev_queue_attr_store,
832};
833
834static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue)
835{
836 struct net_device *dev = queue->dev;
837 int i;
838
839 for (i = 0; i < dev->num_tx_queues; i++)
840 if (queue == &dev->_tx[i])
841 break;
842
843 BUG_ON(i >= dev->num_tx_queues);
844
845 return i;
846}
847
848
849static ssize_t show_xps_map(struct netdev_queue *queue,
850 struct netdev_queue_attribute *attribute, char *buf)
851{
852 struct net_device *dev = queue->dev;
853 struct xps_dev_maps *dev_maps;
854 cpumask_var_t mask;
855 unsigned long index;
856 size_t len = 0;
857 int i;
858
859 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
860 return -ENOMEM;
861
862 index = get_netdev_queue_index(queue);
863
864 rcu_read_lock();
865 dev_maps = rcu_dereference(dev->xps_maps);
866 if (dev_maps) {
867 for_each_possible_cpu(i) {
868 struct xps_map *map =
869 rcu_dereference(dev_maps->cpu_map[i]);
870 if (map) {
871 int j;
872 for (j = 0; j < map->len; j++) {
873 if (map->queues[j] == index) {
874 cpumask_set_cpu(i, mask);
875 break;
876 }
877 }
878 }
879 }
880 }
881 rcu_read_unlock();
882
883 len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
884 if (PAGE_SIZE - len < 3) {
885 free_cpumask_var(mask);
886 return -EINVAL;
887 }
888
889 free_cpumask_var(mask);
890 len += sprintf(buf + len, "\n");
891 return len;
892}
893
894static void xps_map_release(struct rcu_head *rcu)
895{
896 struct xps_map *map = container_of(rcu, struct xps_map, rcu);
897
898 kfree(map);
899}
900
901static void xps_dev_maps_release(struct rcu_head *rcu)
902{
903 struct xps_dev_maps *dev_maps =
904 container_of(rcu, struct xps_dev_maps, rcu);
905
906 kfree(dev_maps);
907}
908
909static DEFINE_MUTEX(xps_map_mutex);
Eric Dumazeta4177862010-11-28 21:43:02 +0000910#define xmap_dereference(P) \
911 rcu_dereference_protected((P), lockdep_is_held(&xps_map_mutex))
Tom Herbert1d24eb42010-11-21 13:17:27 +0000912
913static ssize_t store_xps_map(struct netdev_queue *queue,
914 struct netdev_queue_attribute *attribute,
915 const char *buf, size_t len)
916{
917 struct net_device *dev = queue->dev;
918 cpumask_var_t mask;
919 int err, i, cpu, pos, map_len, alloc_len, need_set;
920 unsigned long index;
921 struct xps_map *map, *new_map;
922 struct xps_dev_maps *dev_maps, *new_dev_maps;
923 int nonempty = 0;
Eric Dumazetf2cd2d32010-11-29 08:14:37 +0000924 int numa_node = -2;
Tom Herbert1d24eb42010-11-21 13:17:27 +0000925
926 if (!capable(CAP_NET_ADMIN))
927 return -EPERM;
928
929 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
930 return -ENOMEM;
931
932 index = get_netdev_queue_index(queue);
933
934 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
935 if (err) {
936 free_cpumask_var(mask);
937 return err;
938 }
939
940 new_dev_maps = kzalloc(max_t(unsigned,
941 XPS_DEV_MAPS_SIZE, L1_CACHE_BYTES), GFP_KERNEL);
942 if (!new_dev_maps) {
943 free_cpumask_var(mask);
944 return -ENOMEM;
945 }
946
947 mutex_lock(&xps_map_mutex);
948
Eric Dumazeta4177862010-11-28 21:43:02 +0000949 dev_maps = xmap_dereference(dev->xps_maps);
Tom Herbert1d24eb42010-11-21 13:17:27 +0000950
951 for_each_possible_cpu(cpu) {
Eric Dumazeta4177862010-11-28 21:43:02 +0000952 map = dev_maps ?
953 xmap_dereference(dev_maps->cpu_map[cpu]) : NULL;
954 new_map = map;
Tom Herbert1d24eb42010-11-21 13:17:27 +0000955 if (map) {
956 for (pos = 0; pos < map->len; pos++)
957 if (map->queues[pos] == index)
958 break;
959 map_len = map->len;
960 alloc_len = map->alloc_len;
961 } else
962 pos = map_len = alloc_len = 0;
963
964 need_set = cpu_isset(cpu, *mask) && cpu_online(cpu);
Eric Dumazetf2cd2d32010-11-29 08:14:37 +0000965#ifdef CONFIG_NUMA
966 if (need_set) {
967 if (numa_node == -2)
968 numa_node = cpu_to_node(cpu);
969 else if (numa_node != cpu_to_node(cpu))
970 numa_node = -1;
971 }
972#endif
Tom Herbert1d24eb42010-11-21 13:17:27 +0000973 if (need_set && pos >= map_len) {
974 /* Need to add queue to this CPU's map */
975 if (map_len >= alloc_len) {
976 alloc_len = alloc_len ?
977 2 * alloc_len : XPS_MIN_MAP_ALLOC;
Eric Dumazetb02038a2010-11-28 05:43:24 +0000978 new_map = kzalloc_node(XPS_MAP_SIZE(alloc_len),
979 GFP_KERNEL,
980 cpu_to_node(cpu));
Tom Herbert1d24eb42010-11-21 13:17:27 +0000981 if (!new_map)
982 goto error;
983 new_map->alloc_len = alloc_len;
984 for (i = 0; i < map_len; i++)
985 new_map->queues[i] = map->queues[i];
986 new_map->len = map_len;
987 }
988 new_map->queues[new_map->len++] = index;
989 } else if (!need_set && pos < map_len) {
990 /* Need to remove queue from this CPU's map */
991 if (map_len > 1)
992 new_map->queues[pos] =
993 new_map->queues[--new_map->len];
994 else
995 new_map = NULL;
996 }
Eric Dumazeta4177862010-11-28 21:43:02 +0000997 RCU_INIT_POINTER(new_dev_maps->cpu_map[cpu], new_map);
Tom Herbert1d24eb42010-11-21 13:17:27 +0000998 }
999
1000 /* Cleanup old maps */
1001 for_each_possible_cpu(cpu) {
Eric Dumazeta4177862010-11-28 21:43:02 +00001002 map = dev_maps ?
1003 xmap_dereference(dev_maps->cpu_map[cpu]) : NULL;
1004 if (map && xmap_dereference(new_dev_maps->cpu_map[cpu]) != map)
Tom Herbert1d24eb42010-11-21 13:17:27 +00001005 call_rcu(&map->rcu, xps_map_release);
1006 if (new_dev_maps->cpu_map[cpu])
1007 nonempty = 1;
1008 }
1009
1010 if (nonempty)
1011 rcu_assign_pointer(dev->xps_maps, new_dev_maps);
1012 else {
1013 kfree(new_dev_maps);
1014 rcu_assign_pointer(dev->xps_maps, NULL);
1015 }
1016
1017 if (dev_maps)
1018 call_rcu(&dev_maps->rcu, xps_dev_maps_release);
1019
Changli Gaob236da62010-12-14 03:09:15 +00001020 netdev_queue_numa_node_write(queue, (numa_node >= 0) ? numa_node :
1021 NUMA_NO_NODE);
Eric Dumazetf2cd2d32010-11-29 08:14:37 +00001022
Tom Herbert1d24eb42010-11-21 13:17:27 +00001023 mutex_unlock(&xps_map_mutex);
1024
1025 free_cpumask_var(mask);
1026 return len;
1027
1028error:
1029 mutex_unlock(&xps_map_mutex);
1030
1031 if (new_dev_maps)
1032 for_each_possible_cpu(i)
Eric Dumazeta4177862010-11-28 21:43:02 +00001033 kfree(rcu_dereference_protected(
1034 new_dev_maps->cpu_map[i],
1035 1));
Tom Herbert1d24eb42010-11-21 13:17:27 +00001036 kfree(new_dev_maps);
1037 free_cpumask_var(mask);
1038 return -ENOMEM;
1039}
1040
1041static struct netdev_queue_attribute xps_cpus_attribute =
1042 __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map);
1043
1044static struct attribute *netdev_queue_default_attrs[] = {
1045 &xps_cpus_attribute.attr,
1046 NULL
1047};
1048
1049static void netdev_queue_release(struct kobject *kobj)
1050{
1051 struct netdev_queue *queue = to_netdev_queue(kobj);
1052 struct net_device *dev = queue->dev;
1053 struct xps_dev_maps *dev_maps;
1054 struct xps_map *map;
1055 unsigned long index;
1056 int i, pos, nonempty = 0;
1057
1058 index = get_netdev_queue_index(queue);
1059
1060 mutex_lock(&xps_map_mutex);
Eric Dumazeta4177862010-11-28 21:43:02 +00001061 dev_maps = xmap_dereference(dev->xps_maps);
Tom Herbert1d24eb42010-11-21 13:17:27 +00001062
1063 if (dev_maps) {
1064 for_each_possible_cpu(i) {
Eric Dumazeta4177862010-11-28 21:43:02 +00001065 map = xmap_dereference(dev_maps->cpu_map[i]);
Tom Herbert1d24eb42010-11-21 13:17:27 +00001066 if (!map)
1067 continue;
1068
1069 for (pos = 0; pos < map->len; pos++)
1070 if (map->queues[pos] == index)
1071 break;
1072
1073 if (pos < map->len) {
1074 if (map->len > 1)
1075 map->queues[pos] =
1076 map->queues[--map->len];
1077 else {
1078 RCU_INIT_POINTER(dev_maps->cpu_map[i],
1079 NULL);
1080 call_rcu(&map->rcu, xps_map_release);
1081 map = NULL;
1082 }
1083 }
1084 if (map)
1085 nonempty = 1;
1086 }
1087
1088 if (!nonempty) {
1089 RCU_INIT_POINTER(dev->xps_maps, NULL);
1090 call_rcu(&dev_maps->rcu, xps_dev_maps_release);
1091 }
1092 }
1093
1094 mutex_unlock(&xps_map_mutex);
1095
1096 memset(kobj, 0, sizeof(*kobj));
1097 dev_put(queue->dev);
1098}
1099
1100static struct kobj_type netdev_queue_ktype = {
1101 .sysfs_ops = &netdev_queue_sysfs_ops,
1102 .release = netdev_queue_release,
1103 .default_attrs = netdev_queue_default_attrs,
1104};
1105
1106static int netdev_queue_add_kobject(struct net_device *net, int index)
1107{
1108 struct netdev_queue *queue = net->_tx + index;
1109 struct kobject *kobj = &queue->kobj;
1110 int error = 0;
1111
1112 kobj->kset = net->queues_kset;
1113 error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL,
1114 "tx-%u", index);
1115 if (error) {
1116 kobject_put(kobj);
1117 return error;
1118 }
1119
1120 kobject_uevent(kobj, KOBJ_ADD);
1121 dev_hold(queue->dev);
1122
1123 return error;
1124}
Tom Herbertbf264142010-11-26 08:36:09 +00001125#endif /* CONFIG_XPS */
Tom Herbert1d24eb42010-11-21 13:17:27 +00001126
1127int
1128netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
1129{
Tom Herbertbf264142010-11-26 08:36:09 +00001130#ifdef CONFIG_XPS
Tom Herbert1d24eb42010-11-21 13:17:27 +00001131 int i;
1132 int error = 0;
1133
1134 for (i = old_num; i < new_num; i++) {
1135 error = netdev_queue_add_kobject(net, i);
1136 if (error) {
1137 new_num = old_num;
1138 break;
1139 }
1140 }
1141
1142 while (--i >= new_num)
1143 kobject_put(&net->_tx[i].kobj);
1144
1145 return error;
Tom Herbertbf264142010-11-26 08:36:09 +00001146#else
1147 return 0;
1148#endif
Tom Herbert1d24eb42010-11-21 13:17:27 +00001149}
1150
1151static int register_queue_kobjects(struct net_device *net)
1152{
Tom Herbertbf264142010-11-26 08:36:09 +00001153 int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0;
Tom Herbert1d24eb42010-11-21 13:17:27 +00001154
Tom Herbertbf264142010-11-26 08:36:09 +00001155#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
Ben Hutchings62fe0b42010-09-27 08:24:33 +00001156 net->queues_kset = kset_create_and_add("queues",
1157 NULL, &net->dev.kobj);
1158 if (!net->queues_kset)
1159 return -ENOMEM;
Tom Herbertbf264142010-11-26 08:36:09 +00001160#endif
Tom Herbert1d24eb42010-11-21 13:17:27 +00001161
Tom Herbertbf264142010-11-26 08:36:09 +00001162#ifdef CONFIG_RPS
1163 real_rx = net->real_num_rx_queues;
1164#endif
1165 real_tx = net->real_num_tx_queues;
1166
1167 error = net_rx_queue_update_kobjects(net, 0, real_rx);
Tom Herbert1d24eb42010-11-21 13:17:27 +00001168 if (error)
1169 goto error;
Tom Herbertbf264142010-11-26 08:36:09 +00001170 rxq = real_rx;
Tom Herbert1d24eb42010-11-21 13:17:27 +00001171
Tom Herbertbf264142010-11-26 08:36:09 +00001172 error = netdev_queue_update_kobjects(net, 0, real_tx);
Tom Herbert1d24eb42010-11-21 13:17:27 +00001173 if (error)
1174 goto error;
Tom Herbertbf264142010-11-26 08:36:09 +00001175 txq = real_tx;
Tom Herbert1d24eb42010-11-21 13:17:27 +00001176
1177 return 0;
1178
1179error:
1180 netdev_queue_update_kobjects(net, txq, 0);
1181 net_rx_queue_update_kobjects(net, rxq, 0);
1182 return error;
Ben Hutchings62fe0b42010-09-27 08:24:33 +00001183}
1184
Tom Herbert1d24eb42010-11-21 13:17:27 +00001185static void remove_queue_kobjects(struct net_device *net)
Tom Herbert0a9627f2010-03-16 08:03:29 +00001186{
Tom Herbertbf264142010-11-26 08:36:09 +00001187 int real_rx = 0, real_tx = 0;
1188
1189#ifdef CONFIG_RPS
1190 real_rx = net->real_num_rx_queues;
1191#endif
1192 real_tx = net->real_num_tx_queues;
1193
1194 net_rx_queue_update_kobjects(net, real_rx, 0);
1195 netdev_queue_update_kobjects(net, real_tx, 0);
1196#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
Tom Herbert0a9627f2010-03-16 08:03:29 +00001197 kset_unregister(net->queues_kset);
Tom Herbertbf264142010-11-26 08:36:09 +00001198#endif
Tom Herbert0a9627f2010-03-16 08:03:29 +00001199}
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001200
1201static const void *net_current_ns(void)
1202{
1203 return current->nsproxy->net_ns;
1204}
1205
1206static const void *net_initial_ns(void)
1207{
1208 return &init_net;
1209}
1210
1211static const void *net_netlink_ns(struct sock *sk)
1212{
1213 return sock_net(sk);
1214}
1215
Johannes Berg04600792010-08-05 17:45:15 +02001216struct kobj_ns_type_operations net_ns_type_operations = {
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001217 .type = KOBJ_NS_TYPE_NET,
1218 .current_ns = net_current_ns,
1219 .netlink_ns = net_netlink_ns,
1220 .initial_ns = net_initial_ns,
1221};
Johannes Berg04600792010-08-05 17:45:15 +02001222EXPORT_SYMBOL_GPL(net_ns_type_operations);
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001223
1224static void net_kobj_ns_exit(struct net *net)
1225{
1226 kobj_ns_exit(KOBJ_NS_TYPE_NET, net);
1227}
1228
Eric W. Biedermand6523dd2010-05-16 21:59:45 -07001229static struct pernet_operations kobj_net_ops = {
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001230 .exit = net_kobj_ns_exit,
1231};
1232
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001233
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234#ifdef CONFIG_HOTPLUG
Kay Sievers7eff2e72007-08-14 15:15:12 +02001235static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001237 struct net_device *dev = to_net_dev(d);
Kay Sievers7eff2e72007-08-14 15:15:12 +02001238 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239
Kay Sievers312c0042005-11-16 09:00:00 +01001240 /* pass interface to uevent. */
Kay Sievers7eff2e72007-08-14 15:15:12 +02001241 retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
Eric Rannaudbf624562007-03-30 22:23:12 -07001242 if (retval)
1243 goto exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244
Jean Tourrilhesca2f37d2007-03-07 10:49:30 -08001245 /* pass ifindex to uevent.
1246 * ifindex is useful as it won't change (interface name may change)
1247 * and is what RtNetlink uses natively. */
Kay Sievers7eff2e72007-08-14 15:15:12 +02001248 retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
Jean Tourrilhesca2f37d2007-03-07 10:49:30 -08001249
Eric Rannaudbf624562007-03-30 22:23:12 -07001250exit:
Eric Rannaudbf624562007-03-30 22:23:12 -07001251 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252}
1253#endif
1254
1255/*
YOSHIFUJI Hideaki4ec93ed2007-02-09 23:24:36 +09001256 * netdev_release -- destroy and free a dead device.
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001257 * Called when last reference to device kobject is gone.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001259static void netdev_release(struct device *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001261 struct net_device *dev = to_net_dev(d);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262
1263 BUG_ON(dev->reg_state != NETREG_RELEASED);
1264
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001265 kfree(dev->ifalias);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 kfree((char *)dev - dev->padded);
1267}
1268
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001269static const void *net_namespace(struct device *d)
1270{
1271 struct net_device *dev;
1272 dev = container_of(d, struct net_device, dev);
1273 return dev_net(dev);
1274}
1275
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276static struct class net_class = {
1277 .name = "net",
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001278 .dev_release = netdev_release,
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001279#ifdef CONFIG_SYSFS
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001280 .dev_attrs = net_class_attributes,
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001281#endif /* CONFIG_SYSFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282#ifdef CONFIG_HOTPLUG
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001283 .dev_uevent = netdev_uevent,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284#endif
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001285 .ns_type = &net_ns_type_operations,
1286 .namespace = net_namespace,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287};
1288
Stephen Hemminger9093bbb2007-05-19 15:39:25 -07001289/* Delete sysfs entries but hold kobject reference until after all
1290 * netdev references are gone.
1291 */
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001292void netdev_unregister_kobject(struct net_device * net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293{
Stephen Hemminger9093bbb2007-05-19 15:39:25 -07001294 struct device *dev = &(net->dev);
1295
1296 kobject_get(&dev->kobj);
Eric W. Biederman38918452008-10-27 17:51:47 -07001297
Tom Herbert1d24eb42010-11-21 13:17:27 +00001298 remove_queue_kobjects(net);
Tom Herbert0a9627f2010-03-16 08:03:29 +00001299
Stephen Hemminger9093bbb2007-05-19 15:39:25 -07001300 device_del(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301}
1302
1303/* Create sysfs entries for network device. */
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001304int netdev_register_kobject(struct net_device *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305{
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001306 struct device *dev = &(net->dev);
David Brownella4dbd672009-06-24 10:06:31 -07001307 const struct attribute_group **groups = net->sysfs_groups;
Tom Herbert0a9627f2010-03-16 08:03:29 +00001308 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309
Eric W. Biedermana1b3f592010-05-04 17:36:49 -07001310 device_initialize(dev);
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001311 dev->class = &net_class;
1312 dev->platform_data = net;
1313 dev->groups = groups;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314
Stephen Hemmingera2205472009-03-09 13:51:55 +00001315 dev_set_name(dev, "%s", net->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001317#ifdef CONFIG_SYSFS
Eric W. Biederman0c509a62009-10-29 14:18:21 +00001318 /* Allow for a device specific group */
1319 if (*groups)
1320 groups++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321
Eric W. Biederman0c509a62009-10-29 14:18:21 +00001322 *groups++ = &netstat_group;
Johannes Berg22bb1be2008-07-10 11:16:47 +02001323#ifdef CONFIG_WIRELESS_EXT_SYSFS
Johannes Berg3d23e342009-09-29 23:27:28 +02001324 if (net->ieee80211_ptr)
Stephen Hemmingerfe9925b2006-05-06 17:56:03 -07001325 *groups++ = &wireless_group;
Johannes Berg3d23e342009-09-29 23:27:28 +02001326#ifdef CONFIG_WIRELESS_EXT
1327 else if (net->wireless_handlers)
1328 *groups++ = &wireless_group;
1329#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330#endif
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001331#endif /* CONFIG_SYSFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332
Tom Herbert0a9627f2010-03-16 08:03:29 +00001333 error = device_add(dev);
1334 if (error)
1335 return error;
1336
Tom Herbert1d24eb42010-11-21 13:17:27 +00001337 error = register_queue_kobjects(net);
Tom Herbert0a9627f2010-03-16 08:03:29 +00001338 if (error) {
1339 device_del(dev);
1340 return error;
1341 }
1342
1343 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344}
1345
Jay Vosburghb8a97872008-06-13 18:12:04 -07001346int netdev_class_create_file(struct class_attribute *class_attr)
1347{
1348 return class_create_file(&net_class, class_attr);
1349}
Eric Dumazet9e34a5b2010-07-09 21:22:04 +00001350EXPORT_SYMBOL(netdev_class_create_file);
Jay Vosburghb8a97872008-06-13 18:12:04 -07001351
1352void netdev_class_remove_file(struct class_attribute *class_attr)
1353{
1354 class_remove_file(&net_class, class_attr);
1355}
Jay Vosburghb8a97872008-06-13 18:12:04 -07001356EXPORT_SYMBOL(netdev_class_remove_file);
1357
Eric W. Biederman8b41d182007-09-26 22:02:53 -07001358int netdev_kobject_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359{
Eric W. Biederman608b4b92010-05-04 17:36:45 -07001360 kobj_ns_type_register(&net_ns_type_operations);
Eric W. Biedermand6523dd2010-05-16 21:59:45 -07001361 register_pernet_subsys(&kobj_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 return class_register(&net_class);
1363}