blob: fd5799c9bc8de350df12db5e35331990cc46eb03 [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 *);
26 ssize_t (*store)(struct net_bridge_port *, unsigned long);
27};
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}
41static ssize_t store_path_cost(struct net_bridge_port *p, unsigned long v)
42{
43 br_stp_set_path_cost(p, v);
44 return 0;
45}
46static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR,
47 show_path_cost, store_path_cost);
48
49static ssize_t show_priority(struct net_bridge_port *p, char *buf)
50{
51 return sprintf(buf, "%d\n", p->priority);
52}
53static ssize_t store_priority(struct net_bridge_port *p, unsigned long v)
54{
55 if (v >= (1<<(16-BR_PORT_BITS)))
56 return -ERANGE;
57 br_stp_set_port_priority(p, v);
58 return 0;
59}
60static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR,
61 show_priority, store_priority);
62
63static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
64{
65 return br_show_bridge_id(buf, &p->designated_root);
66}
67static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL);
68
69static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
70{
71 return br_show_bridge_id(buf, &p->designated_bridge);
72}
73static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL);
74
75static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
76{
77 return sprintf(buf, "%d\n", p->designated_port);
78}
79static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL);
80
81static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
82{
83 return sprintf(buf, "%d\n", p->designated_cost);
84}
85static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL);
86
87static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
88{
89 return sprintf(buf, "0x%x\n", p->port_id);
90}
91static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL);
92
93static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
94{
95 return sprintf(buf, "0x%x\n", p->port_no);
96}
97
98static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL);
99
100static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
101{
102 return sprintf(buf, "%d\n", p->topology_change_ack);
103}
104static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL);
105
106static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
107{
108 return sprintf(buf, "%d\n", p->config_pending);
109}
110static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL);
111
112static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
113{
114 return sprintf(buf, "%d\n", p->state);
115}
116static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL);
117
118static ssize_t show_message_age_timer(struct net_bridge_port *p,
119 char *buf)
120{
121 return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer));
122}
123static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL);
124
125static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
126 char *buf)
127{
128 return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer));
129}
130static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL);
131
132static ssize_t show_hold_timer(struct net_bridge_port *p,
133 char *buf)
134{
135 return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer));
136}
137static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL);
138
Stephen Hemminger9cf63742007-04-09 12:57:54 -0700139static ssize_t store_flush(struct net_bridge_port *p, unsigned long v)
140{
141 br_fdb_delete_by_port(p->br, p, 0); // Don't delete local entry
142 return 0;
143}
144static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush);
145
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000146static ssize_t show_hairpin_mode(struct net_bridge_port *p, char *buf)
147{
148 int hairpin_mode = (p->flags & BR_HAIRPIN_MODE) ? 1 : 0;
149 return sprintf(buf, "%d\n", hairpin_mode);
150}
151static ssize_t store_hairpin_mode(struct net_bridge_port *p, unsigned long v)
152{
153 if (v)
154 p->flags |= BR_HAIRPIN_MODE;
155 else
156 p->flags &= ~BR_HAIRPIN_MODE;
157 return 0;
158}
159static BRPORT_ATTR(hairpin_mode, S_IRUGO | S_IWUSR,
160 show_hairpin_mode, store_hairpin_mode);
161
Herbert Xu0909e112010-02-27 19:41:49 +0000162#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
163static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
164{
165 return sprintf(buf, "%d\n", p->multicast_router);
166}
167
168static ssize_t store_multicast_router(struct net_bridge_port *p,
169 unsigned long v)
170{
171 return br_multicast_set_port_router(p, v);
172}
173static BRPORT_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router,
174 store_multicast_router);
175#endif
176
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177static struct brport_attribute *brport_attrs[] = {
178 &brport_attr_path_cost,
179 &brport_attr_priority,
180 &brport_attr_port_id,
181 &brport_attr_port_no,
182 &brport_attr_designated_root,
183 &brport_attr_designated_bridge,
184 &brport_attr_designated_port,
185 &brport_attr_designated_cost,
186 &brport_attr_state,
187 &brport_attr_change_ack,
188 &brport_attr_config_pending,
189 &brport_attr_message_age_timer,
190 &brport_attr_forward_delay_timer,
191 &brport_attr_hold_timer,
Stephen Hemminger9cf63742007-04-09 12:57:54 -0700192 &brport_attr_flush,
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000193 &brport_attr_hairpin_mode,
Herbert Xu0909e112010-02-27 19:41:49 +0000194#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
195 &brport_attr_multicast_router,
196#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 NULL
198};
199
200#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
201#define to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
202
203static ssize_t brport_show(struct kobject * kobj,
204 struct attribute * attr, char * buf)
205{
206 struct brport_attribute * brport_attr = to_brport_attr(attr);
207 struct net_bridge_port * p = to_brport(kobj);
208
209 return brport_attr->show(p, buf);
210}
211
212static ssize_t brport_store(struct kobject * kobj,
213 struct attribute * attr,
214 const char * buf, size_t count)
215{
216 struct brport_attribute * brport_attr = to_brport_attr(attr);
217 struct net_bridge_port * p = to_brport(kobj);
218 ssize_t ret = -EINVAL;
219 char *endp;
220 unsigned long val;
221
222 if (!capable(CAP_NET_ADMIN))
223 return -EPERM;
224
225 val = simple_strtoul(buf, &endp, 0);
226 if (endp != buf) {
Eric W. Biedermanaf38f292009-05-13 17:00:41 +0000227 if (!rtnl_trylock())
228 return restart_syscall();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 if (p->dev && p->br && brport_attr->store) {
230 spin_lock_bh(&p->br->lock);
231 ret = brport_attr->store(p, val);
232 spin_unlock_bh(&p->br->lock);
233 if (ret == 0)
234 ret = count;
235 }
236 rtnl_unlock();
237 }
238 return ret;
239}
240
Emese Revfy52cf25d2010-01-19 02:58:23 +0100241const struct sysfs_ops brport_sysfs_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 .show = brport_show,
243 .store = brport_store,
244};
245
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246/*
247 * Add sysfs entries to ethernet device added to a bridge.
248 * Creates a brport subdirectory with bridge attributes.
Simon Arlotte0f43752010-05-10 09:31:11 +0000249 * Puts symlink in bridge's brif subdirectory
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 */
251int br_sysfs_addif(struct net_bridge_port *p)
252{
253 struct net_bridge *br = p->br;
254 struct brport_attribute **a;
255 int err;
256
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700257 err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 SYSFS_BRIDGE_PORT_LINK);
259 if (err)
Simon Arlotte0f43752010-05-10 09:31:11 +0000260 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
262 for (a = brport_attrs; *a; ++a) {
263 err = sysfs_create_file(&p->kobj, &((*a)->attr));
264 if (err)
Simon Arlotte0f43752010-05-10 09:31:11 +0000265 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 }
267
Simon Arlotte0f43752010-05-10 09:31:11 +0000268 strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
269 return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name);
270}
271
272/* Rename bridge's brif symlink */
273int br_sysfs_renameif(struct net_bridge_port *p)
274{
275 struct net_bridge *br = p->br;
276 int err;
277
278 /* If a rename fails, the rollback will cause another
279 * rename call with the existing name.
280 */
281 if (!strncmp(p->sysfs_name, p->dev->name, IFNAMSIZ))
282 return 0;
283
284 err = sysfs_rename_link(br->ifobj, &p->kobj,
285 p->sysfs_name, p->dev->name);
286 if (err)
287 netdev_notice(br->dev, "unable to rename link %s to %s",
288 p->sysfs_name, p->dev->name);
289 else
290 strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
291
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 return err;
293}