2 * Sysfs attributes of bridge ports
3 * Linux ethernet bridge
6 * Stephen Hemminger <shemminger@osdl.org>
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.
14 #include <linux/capability.h>
15 #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>
21 #include "br_private.h"
23 struct 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);
29 #define BRPORT_ATTR(_name,_mode,_show,_store) \
30 struct brport_attribute brport_attr_##_name = { \
31 .attr = {.name = __stringify(_name), \
37 static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
39 return sprintf(buf, "%d\n", p->path_cost);
41 static ssize_t store_path_cost(struct net_bridge_port *p, unsigned long v)
43 br_stp_set_path_cost(p, v);
46 static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR,
47 show_path_cost, store_path_cost);
49 static ssize_t show_priority(struct net_bridge_port *p, char *buf)
51 return sprintf(buf, "%d\n", p->priority);
53 static ssize_t store_priority(struct net_bridge_port *p, unsigned long v)
55 if (v >= (1<<(16-BR_PORT_BITS)))
57 br_stp_set_port_priority(p, v);
60 static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR,
61 show_priority, store_priority);
63 static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
65 return br_show_bridge_id(buf, &p->designated_root);
67 static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL);
69 static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
71 return br_show_bridge_id(buf, &p->designated_bridge);
73 static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL);
75 static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
77 return sprintf(buf, "%d\n", p->designated_port);
79 static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL);
81 static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
83 return sprintf(buf, "%d\n", p->designated_cost);
85 static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL);
87 static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
89 return sprintf(buf, "0x%x\n", p->port_id);
91 static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL);
93 static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
95 return sprintf(buf, "0x%x\n", p->port_no);
98 static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL);
100 static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
102 return sprintf(buf, "%d\n", p->topology_change_ack);
104 static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL);
106 static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
108 return sprintf(buf, "%d\n", p->config_pending);
110 static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL);
112 static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
114 return sprintf(buf, "%d\n", p->state);
116 static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL);
118 static ssize_t show_message_age_timer(struct net_bridge_port *p,
121 return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer));
123 static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL);
125 static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
128 return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer));
130 static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL);
132 static ssize_t show_hold_timer(struct net_bridge_port *p,
135 return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer));
137 static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL);
139 static ssize_t store_flush(struct net_bridge_port *p, unsigned long v)
141 br_fdb_delete_by_port(p->br, p, 0); // Don't delete local entry
144 static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush);
146 static struct brport_attribute *brport_attrs[] = {
147 &brport_attr_path_cost,
148 &brport_attr_priority,
149 &brport_attr_port_id,
150 &brport_attr_port_no,
151 &brport_attr_designated_root,
152 &brport_attr_designated_bridge,
153 &brport_attr_designated_port,
154 &brport_attr_designated_cost,
156 &brport_attr_change_ack,
157 &brport_attr_config_pending,
158 &brport_attr_message_age_timer,
159 &brport_attr_forward_delay_timer,
160 &brport_attr_hold_timer,
165 #define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
166 #define to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
168 static ssize_t brport_show(struct kobject * kobj,
169 struct attribute * attr, char * buf)
171 struct brport_attribute * brport_attr = to_brport_attr(attr);
172 struct net_bridge_port * p = to_brport(kobj);
174 return brport_attr->show(p, buf);
177 static ssize_t brport_store(struct kobject * kobj,
178 struct attribute * attr,
179 const char * buf, size_t count)
181 struct brport_attribute * brport_attr = to_brport_attr(attr);
182 struct net_bridge_port * p = to_brport(kobj);
183 ssize_t ret = -EINVAL;
187 if (!capable(CAP_NET_ADMIN))
190 val = simple_strtoul(buf, &endp, 0);
193 if (p->dev && p->br && brport_attr->store) {
194 spin_lock_bh(&p->br->lock);
195 ret = brport_attr->store(p, val);
196 spin_unlock_bh(&p->br->lock);
205 struct sysfs_ops brport_sysfs_ops = {
207 .store = brport_store,
211 * Add sysfs entries to ethernet device added to a bridge.
212 * Creates a brport subdirectory with bridge attributes.
213 * Puts symlink in bridge's brport subdirectory
215 int br_sysfs_addif(struct net_bridge_port *p)
217 struct net_bridge *br = p->br;
218 struct brport_attribute **a;
221 err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj,
222 SYSFS_BRIDGE_PORT_LINK);
226 for (a = brport_attrs; *a; ++a) {
227 err = sysfs_create_file(&p->kobj, &((*a)->attr));
232 err = sysfs_create_link(br->ifobj, &p->kobj, p->dev->name);