2 * Sysfs attributes of bridge ports for Open vSwitch
4 * This has been shamelessly copied from the kernel sources.
7 #include <linux/capability.h>
8 #include <linux/kernel.h>
9 #include <linux/netdevice.h>
10 #include <linux/if_bridge.h>
11 #include <linux/rtnetlink.h>
12 #include <linux/spinlock.h>
13 #include "brc_sysfs.h"
18 struct brport_attribute {
19 struct attribute attr;
20 ssize_t (*show)(struct net_bridge_port *, char *);
21 ssize_t (*store)(struct net_bridge_port *, unsigned long);
24 #define BRPORT_ATTR(_name,_mode,_show,_store) \
25 struct brport_attribute brport_attr_##_name = { \
26 .attr = {.name = __stringify(_name), \
28 .owner = THIS_MODULE, }, \
33 static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
36 return sprintf(buf, "%d\n", p->path_cost);
38 return sprintf(buf, "%d\n", 0);
41 static ssize_t store_path_cost(struct net_bridge_port *p, unsigned long v)
44 br_stp_set_path_cost(p, v);
48 static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR,
49 show_path_cost, store_path_cost);
51 static ssize_t show_priority(struct net_bridge_port *p, char *buf)
54 return sprintf(buf, "%d\n", p->priority);
56 return sprintf(buf, "%d\n", 0);
59 static ssize_t store_priority(struct net_bridge_port *p, unsigned long v)
62 if (v >= (1<<(16-BR_PORT_BITS)))
64 br_stp_set_port_priority(p, v);
68 static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR,
69 show_priority, store_priority);
71 static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
74 return br_show_bridge_id(buf, &p->designated_root);
76 return sprintf(buf, "0000.010203040506\n");
79 static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL);
81 static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
84 return br_show_bridge_id(buf, &p->designated_bridge);
86 return sprintf(buf, "0000.060504030201\n");
89 static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL);
91 static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
94 return sprintf(buf, "%d\n", p->designated_port);
96 return sprintf(buf, "%d\n", 0);
99 static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL);
101 static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
104 return sprintf(buf, "%d\n", p->designated_cost);
106 return sprintf(buf, "%d\n", 0);
109 static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL);
111 static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
114 return sprintf(buf, "0x%x\n", p->port_id);
116 return sprintf(buf, "0x%x\n", 0);
119 static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL);
121 static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
123 return sprintf(buf, "0x%x\n", p->port_no);
126 static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL);
128 static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
131 return sprintf(buf, "%d\n", p->topology_change_ack);
133 return sprintf(buf, "%d\n", 0);
136 static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL);
138 static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
141 return sprintf(buf, "%d\n", p->config_pending);
143 return sprintf(buf, "%d\n", 0);
146 static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL);
148 static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
151 return sprintf(buf, "%d\n", p->state);
153 return sprintf(buf, "%d\n", 0);
156 static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL);
158 static ssize_t show_message_age_timer(struct net_bridge_port *p,
162 return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer));
164 return sprintf(buf, "%d\n", 0);
167 static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL);
169 static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
173 return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer));
175 return sprintf(buf, "%d\n", 0);
178 static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL);
180 static ssize_t show_hold_timer(struct net_bridge_port *p,
184 return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer));
186 return sprintf(buf, "%d\n", 0);
189 static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL);
191 static struct brport_attribute *brport_attrs[] = {
192 &brport_attr_path_cost,
193 &brport_attr_priority,
194 &brport_attr_port_id,
195 &brport_attr_port_no,
196 &brport_attr_designated_root,
197 &brport_attr_designated_bridge,
198 &brport_attr_designated_port,
199 &brport_attr_designated_cost,
201 &brport_attr_change_ack,
202 &brport_attr_config_pending,
203 &brport_attr_message_age_timer,
204 &brport_attr_forward_delay_timer,
205 &brport_attr_hold_timer,
209 #define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
210 #define to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
212 static ssize_t brport_show(struct kobject * kobj,
213 struct attribute * attr, char * buf)
215 struct brport_attribute * brport_attr = to_brport_attr(attr);
216 struct net_bridge_port * p = to_brport(kobj);
218 return brport_attr->show(p, buf);
221 static ssize_t brport_store(struct kobject * kobj,
222 struct attribute * attr,
223 const char * buf, size_t count)
225 struct net_bridge_port * p = to_brport(kobj);
227 struct brport_attribute * brport_attr = to_brport_attr(attr);
231 ssize_t ret = -EINVAL;
233 if (!capable(CAP_NET_ADMIN))
237 val = simple_strtoul(buf, &endp, 0);
240 if (p->dev && p->br && brport_attr->store) {
241 spin_lock_bh(&p->br->lock);
242 ret = brport_attr->store(p, val);
243 spin_unlock_bh(&p->br->lock);
250 printk("%s: xxx writing port parms not supported yet!\n",
256 struct sysfs_ops brport_sysfs_ops = {
258 .store = brport_store,
261 static void release_nbp(struct kobject *kobj)
263 struct net_bridge_port *p
264 = container_of(kobj, struct net_bridge_port, kobj);
268 struct kobj_type brport_ktype = {
269 .sysfs_ops = &brport_sysfs_ops,
270 .release = release_nbp
274 * Add sysfs entries to ethernet device added to a bridge.
275 * Creates a brport subdirectory with bridge attributes.
276 * Puts symlink in bridge's brport subdirectory
278 int brc_sysfs_add_if(struct net_bridge_port *p)
280 struct datapath *dp = p->dp;
281 struct brport_attribute **a;
284 err = kobject_init_and_add(&p->kobj, &brport_ktype,
285 &(p->dev->NETDEV_DEV_MEMBER.kobj),
286 SYSFS_BRIDGE_PORT_ATTR);
290 err = sysfs_create_link(&p->kobj,
291 &dp->ports[ODPP_LOCAL]->dev->NETDEV_DEV_MEMBER.kobj,
292 SYSFS_BRIDGE_PORT_LINK);
296 for (a = brport_attrs; *a; ++a) {
297 err = sysfs_create_file(&p->kobj, &((*a)->attr));
302 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
303 err = sysfs_create_link(&dp->ifobj, &p->kobj, p->dev->name);
305 err = sysfs_create_link(dp->ifobj, &p->kobj, p->dev->name);
310 kobject_uevent(&p->kobj, KOBJ_ADD);
315 kobject_del(&p->kobj);
316 kobject_put(&p->kobj);
321 int brc_sysfs_del_if(struct net_bridge_port *p)
323 struct net_device *dev = p->dev;
325 kobject_uevent(&p->kobj, KOBJ_REMOVE);
326 kobject_del(&p->kobj);
330 kobject_put(&p->kobj);
334 #endif /* CONFIG_SYSFS */