blob: c51c9e42aeb3d0b6709edf35841699770725c5d5 [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), \
32 .mode = _mode, \
33 .owner = THIS_MODULE, }, \
34 .show = _show, \
35 .store = _store, \
36};
37
38static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
39{
40 return sprintf(buf, "%d\n", p->path_cost);
41}
42static ssize_t store_path_cost(struct net_bridge_port *p, unsigned long v)
43{
44 br_stp_set_path_cost(p, v);
45 return 0;
46}
47static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR,
48 show_path_cost, store_path_cost);
49
50static ssize_t show_priority(struct net_bridge_port *p, char *buf)
51{
52 return sprintf(buf, "%d\n", p->priority);
53}
54static ssize_t store_priority(struct net_bridge_port *p, unsigned long v)
55{
56 if (v >= (1<<(16-BR_PORT_BITS)))
57 return -ERANGE;
58 br_stp_set_port_priority(p, v);
59 return 0;
60}
61static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR,
62 show_priority, store_priority);
63
64static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
65{
66 return br_show_bridge_id(buf, &p->designated_root);
67}
68static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL);
69
70static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
71{
72 return br_show_bridge_id(buf, &p->designated_bridge);
73}
74static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL);
75
76static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
77{
78 return sprintf(buf, "%d\n", p->designated_port);
79}
80static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL);
81
82static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
83{
84 return sprintf(buf, "%d\n", p->designated_cost);
85}
86static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL);
87
88static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
89{
90 return sprintf(buf, "0x%x\n", p->port_id);
91}
92static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL);
93
94static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
95{
96 return sprintf(buf, "0x%x\n", p->port_no);
97}
98
99static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL);
100
101static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
102{
103 return sprintf(buf, "%d\n", p->topology_change_ack);
104}
105static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL);
106
107static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
108{
109 return sprintf(buf, "%d\n", p->config_pending);
110}
111static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL);
112
113static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
114{
115 return sprintf(buf, "%d\n", p->state);
116}
117static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL);
118
119static ssize_t show_message_age_timer(struct net_bridge_port *p,
120 char *buf)
121{
122 return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer));
123}
124static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL);
125
126static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
127 char *buf)
128{
129 return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer));
130}
131static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL);
132
133static ssize_t show_hold_timer(struct net_bridge_port *p,
134 char *buf)
135{
136 return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer));
137}
138static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL);
139
140static struct brport_attribute *brport_attrs[] = {
141 &brport_attr_path_cost,
142 &brport_attr_priority,
143 &brport_attr_port_id,
144 &brport_attr_port_no,
145 &brport_attr_designated_root,
146 &brport_attr_designated_bridge,
147 &brport_attr_designated_port,
148 &brport_attr_designated_cost,
149 &brport_attr_state,
150 &brport_attr_change_ack,
151 &brport_attr_config_pending,
152 &brport_attr_message_age_timer,
153 &brport_attr_forward_delay_timer,
154 &brport_attr_hold_timer,
155 NULL
156};
157
158#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
159#define to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
160
161static ssize_t brport_show(struct kobject * kobj,
162 struct attribute * attr, char * buf)
163{
164 struct brport_attribute * brport_attr = to_brport_attr(attr);
165 struct net_bridge_port * p = to_brport(kobj);
166
167 return brport_attr->show(p, buf);
168}
169
170static ssize_t brport_store(struct kobject * kobj,
171 struct attribute * attr,
172 const char * buf, size_t count)
173{
174 struct brport_attribute * brport_attr = to_brport_attr(attr);
175 struct net_bridge_port * p = to_brport(kobj);
176 ssize_t ret = -EINVAL;
177 char *endp;
178 unsigned long val;
179
180 if (!capable(CAP_NET_ADMIN))
181 return -EPERM;
182
183 val = simple_strtoul(buf, &endp, 0);
184 if (endp != buf) {
185 rtnl_lock();
186 if (p->dev && p->br && brport_attr->store) {
187 spin_lock_bh(&p->br->lock);
188 ret = brport_attr->store(p, val);
189 spin_unlock_bh(&p->br->lock);
190 if (ret == 0)
191 ret = count;
192 }
193 rtnl_unlock();
194 }
195 return ret;
196}
197
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800198struct sysfs_ops brport_sysfs_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 .show = brport_show,
200 .store = brport_store,
201};
202
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203/*
204 * Add sysfs entries to ethernet device added to a bridge.
205 * Creates a brport subdirectory with bridge attributes.
206 * Puts symlink in bridge's brport subdirectory
207 */
208int br_sysfs_addif(struct net_bridge_port *p)
209{
210 struct net_bridge *br = p->br;
211 struct brport_attribute **a;
212 int err;
213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 err = sysfs_create_link(&p->kobj, &br->dev->class_dev.kobj,
215 SYSFS_BRIDGE_PORT_LINK);
216 if (err)
217 goto out2;
218
219 for (a = brport_attrs; *a; ++a) {
220 err = sysfs_create_file(&p->kobj, &((*a)->attr));
221 if (err)
222 goto out2;
223 }
224
Stephen Hemmingerbab1dee2006-02-09 17:10:12 -0800225 err= sysfs_create_link(&br->ifobj, &p->kobj, p->dev->name);
226out2:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 return err;
228}