blob: 6229b62749e83a9dbf8469f7b427f46133b868db [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Sysfs attributes of bridge ports
3 * Linux ethernet bridge
4 *
5 * Authors:
6 * Stephen Hemminger <shemminger@osdl.org>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
12 */
13
Randy Dunlap4fc268d2006-01-11 12:17:47 -080014#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/kernel.h>
16#include <linux/netdevice.h>
17#include <linux/if_bridge.h>
18#include <linux/rtnetlink.h>
19#include <linux/spinlock.h>
20
21#include "br_private.h"
22
23struct brport_attribute {
24 struct attribute attr;
25 ssize_t (*show)(struct net_bridge_port *, char *);
stephen hemminger14f98f22011-04-04 14:03:33 +000026 int (*store)(struct net_bridge_port *, unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -070027};
28
29#define BRPORT_ATTR(_name,_mode,_show,_store) \
30struct brport_attribute brport_attr_##_name = { \
31 .attr = {.name = __stringify(_name), \
Tejun Heo7b595752007-06-14 03:45:17 +090032 .mode = _mode }, \
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 .show = _show, \
34 .store = _store, \
35};
36
37static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
38{
39 return sprintf(buf, "%d\n", p->path_cost);
40}
stephen hemminger14f98f22011-04-04 14:03:33 +000041
Linus Torvalds1da177e2005-04-16 15:20:36 -070042static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR,
stephen hemminger14f98f22011-04-04 14:03:33 +000043 show_path_cost, br_stp_set_path_cost);
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45static ssize_t show_priority(struct net_bridge_port *p, char *buf)
46{
47 return sprintf(buf, "%d\n", p->priority);
48}
stephen hemminger14f98f22011-04-04 14:03:33 +000049
Linus Torvalds1da177e2005-04-16 15:20:36 -070050static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR,
stephen hemminger14f98f22011-04-04 14:03:33 +000051 show_priority, br_stp_set_port_priority);
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
54{
55 return br_show_bridge_id(buf, &p->designated_root);
56}
57static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL);
58
59static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
60{
61 return br_show_bridge_id(buf, &p->designated_bridge);
62}
63static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL);
64
65static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
66{
67 return sprintf(buf, "%d\n", p->designated_port);
68}
69static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL);
70
71static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
72{
73 return sprintf(buf, "%d\n", p->designated_cost);
74}
75static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL);
76
77static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
78{
79 return sprintf(buf, "0x%x\n", p->port_id);
80}
81static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL);
82
83static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
84{
85 return sprintf(buf, "0x%x\n", p->port_no);
86}
87
88static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL);
89
90static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
91{
92 return sprintf(buf, "%d\n", p->topology_change_ack);
93}
94static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL);
95
96static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
97{
98 return sprintf(buf, "%d\n", p->config_pending);
99}
100static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL);
101
102static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
103{
104 return sprintf(buf, "%d\n", p->state);
105}
106static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL);
107
108static ssize_t show_message_age_timer(struct net_bridge_port *p,
109 char *buf)
110{
111 return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer));
112}
113static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL);
114
115static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
116 char *buf)
117{
118 return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer));
119}
120static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL);
121
122static ssize_t show_hold_timer(struct net_bridge_port *p,
123 char *buf)
124{
125 return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer));
126}
127static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL);
128
stephen hemminger14f98f22011-04-04 14:03:33 +0000129static int store_flush(struct net_bridge_port *p, unsigned long v)
Stephen Hemminger9cf63742007-04-09 12:57:54 -0700130{
131 br_fdb_delete_by_port(p->br, p, 0); // Don't delete local entry
132 return 0;
133}
134static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush);
135
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000136static ssize_t show_hairpin_mode(struct net_bridge_port *p, char *buf)
137{
138 int hairpin_mode = (p->flags & BR_HAIRPIN_MODE) ? 1 : 0;
139 return sprintf(buf, "%d\n", hairpin_mode);
140}
stephen hemminger14f98f22011-04-04 14:03:33 +0000141static int store_hairpin_mode(struct net_bridge_port *p, unsigned long v)
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000142{
143 if (v)
144 p->flags |= BR_HAIRPIN_MODE;
145 else
146 p->flags &= ~BR_HAIRPIN_MODE;
147 return 0;
148}
149static BRPORT_ATTR(hairpin_mode, S_IRUGO | S_IWUSR,
150 show_hairpin_mode, store_hairpin_mode);
151
Herbert Xu0909e112010-02-27 19:41:49 +0000152#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
153static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
154{
155 return sprintf(buf, "%d\n", p->multicast_router);
156}
157
stephen hemminger14f98f22011-04-04 14:03:33 +0000158static int store_multicast_router(struct net_bridge_port *p,
Herbert Xu0909e112010-02-27 19:41:49 +0000159 unsigned long v)
160{
161 return br_multicast_set_port_router(p, v);
162}
163static BRPORT_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router,
164 store_multicast_router);
165#endif
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167static struct brport_attribute *brport_attrs[] = {
168 &brport_attr_path_cost,
169 &brport_attr_priority,
170 &brport_attr_port_id,
171 &brport_attr_port_no,
172 &brport_attr_designated_root,
173 &brport_attr_designated_bridge,
174 &brport_attr_designated_port,
175 &brport_attr_designated_cost,
176 &brport_attr_state,
177 &brport_attr_change_ack,
178 &brport_attr_config_pending,
179 &brport_attr_message_age_timer,
180 &brport_attr_forward_delay_timer,
181 &brport_attr_hold_timer,
Stephen Hemminger9cf63742007-04-09 12:57:54 -0700182 &brport_attr_flush,
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000183 &brport_attr_hairpin_mode,
Herbert Xu0909e112010-02-27 19:41:49 +0000184#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
185 &brport_attr_multicast_router,
186#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 NULL
188};
189
190#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
191#define to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
192
193static ssize_t brport_show(struct kobject * kobj,
194 struct attribute * attr, char * buf)
195{
196 struct brport_attribute * brport_attr = to_brport_attr(attr);
197 struct net_bridge_port * p = to_brport(kobj);
198
199 return brport_attr->show(p, buf);
200}
201
202static ssize_t brport_store(struct kobject * kobj,
203 struct attribute * attr,
204 const char * buf, size_t count)
205{
206 struct brport_attribute * brport_attr = to_brport_attr(attr);
207 struct net_bridge_port * p = to_brport(kobj);
208 ssize_t ret = -EINVAL;
209 char *endp;
210 unsigned long val;
211
212 if (!capable(CAP_NET_ADMIN))
213 return -EPERM;
214
215 val = simple_strtoul(buf, &endp, 0);
216 if (endp != buf) {
Eric W. Biedermanaf38f292009-05-13 17:00:41 +0000217 if (!rtnl_trylock())
218 return restart_syscall();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 if (p->dev && p->br && brport_attr->store) {
220 spin_lock_bh(&p->br->lock);
221 ret = brport_attr->store(p, val);
222 spin_unlock_bh(&p->br->lock);
223 if (ret == 0)
224 ret = count;
225 }
226 rtnl_unlock();
227 }
228 return ret;
229}
230
Emese Revfy52cf25d2010-01-19 02:58:23 +0100231const struct sysfs_ops brport_sysfs_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 .show = brport_show,
233 .store = brport_store,
234};
235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236/*
237 * Add sysfs entries to ethernet device added to a bridge.
238 * Creates a brport subdirectory with bridge attributes.
Simon Arlotte0f43752010-05-10 09:31:11 +0000239 * Puts symlink in bridge's brif subdirectory
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 */
241int br_sysfs_addif(struct net_bridge_port *p)
242{
243 struct net_bridge *br = p->br;
244 struct brport_attribute **a;
245 int err;
246
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700247 err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 SYSFS_BRIDGE_PORT_LINK);
249 if (err)
Simon Arlotte0f43752010-05-10 09:31:11 +0000250 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
252 for (a = brport_attrs; *a; ++a) {
253 err = sysfs_create_file(&p->kobj, &((*a)->attr));
254 if (err)
Simon Arlotte0f43752010-05-10 09:31:11 +0000255 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 }
257
Simon Arlotte0f43752010-05-10 09:31:11 +0000258 strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
259 return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name);
260}
261
262/* Rename bridge's brif symlink */
263int br_sysfs_renameif(struct net_bridge_port *p)
264{
265 struct net_bridge *br = p->br;
266 int err;
267
268 /* If a rename fails, the rollback will cause another
269 * rename call with the existing name.
270 */
271 if (!strncmp(p->sysfs_name, p->dev->name, IFNAMSIZ))
272 return 0;
273
274 err = sysfs_rename_link(br->ifobj, &p->kobj,
275 p->sysfs_name, p->dev->name);
276 if (err)
277 netdev_notice(br->dev, "unable to rename link %s to %s",
278 p->sysfs_name, p->dev->name);
279 else
280 strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 return err;
283}