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-rw-r--r--net/bridge/br_sysfs_if.c269
1 files changed, 269 insertions, 0 deletions
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
new file mode 100644
index 000000000000..567249bf9331
--- /dev/null
+++ b/net/bridge/br_sysfs_if.c
@@ -0,0 +1,269 @@
1/*
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
14#include <linux/kernel.h>
15#include <linux/netdevice.h>
16#include <linux/if_bridge.h>
17#include <linux/rtnetlink.h>
18#include <linux/spinlock.h>
19
20#include "br_private.h"
21
22struct brport_attribute {
23 struct attribute attr;
24 ssize_t (*show)(struct net_bridge_port *, char *);
25 ssize_t (*store)(struct net_bridge_port *, unsigned long);
26};
27
28#define BRPORT_ATTR(_name,_mode,_show,_store) \
29struct brport_attribute brport_attr_##_name = { \
30 .attr = {.name = __stringify(_name), \
31 .mode = _mode, \
32 .owner = THIS_MODULE, }, \
33 .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
139static struct brport_attribute *brport_attrs[] = {
140 &brport_attr_path_cost,
141 &brport_attr_priority,
142 &brport_attr_port_id,
143 &brport_attr_port_no,
144 &brport_attr_designated_root,
145 &brport_attr_designated_bridge,
146 &brport_attr_designated_port,
147 &brport_attr_designated_cost,
148 &brport_attr_state,
149 &brport_attr_change_ack,
150 &brport_attr_config_pending,
151 &brport_attr_message_age_timer,
152 &brport_attr_forward_delay_timer,
153 &brport_attr_hold_timer,
154 NULL
155};
156
157#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
158#define to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
159
160static ssize_t brport_show(struct kobject * kobj,
161 struct attribute * attr, char * buf)
162{
163 struct brport_attribute * brport_attr = to_brport_attr(attr);
164 struct net_bridge_port * p = to_brport(kobj);
165
166 return brport_attr->show(p, buf);
167}
168
169static ssize_t brport_store(struct kobject * kobj,
170 struct attribute * attr,
171 const char * buf, size_t count)
172{
173 struct brport_attribute * brport_attr = to_brport_attr(attr);
174 struct net_bridge_port * p = to_brport(kobj);
175 ssize_t ret = -EINVAL;
176 char *endp;
177 unsigned long val;
178
179 if (!capable(CAP_NET_ADMIN))
180 return -EPERM;
181
182 val = simple_strtoul(buf, &endp, 0);
183 if (endp != buf) {
184 rtnl_lock();
185 if (p->dev && p->br && brport_attr->store) {
186 spin_lock_bh(&p->br->lock);
187 ret = brport_attr->store(p, val);
188 spin_unlock_bh(&p->br->lock);
189 if (ret == 0)
190 ret = count;
191 }
192 rtnl_unlock();
193 }
194 return ret;
195}
196
197/* called from kobject_put when port ref count goes to zero. */
198static void brport_release(struct kobject *kobj)
199{
200 kfree(container_of(kobj, struct net_bridge_port, kobj));
201}
202
203static struct sysfs_ops brport_sysfs_ops = {
204 .show = brport_show,
205 .store = brport_store,
206};
207
208static struct kobj_type brport_ktype = {
209 .sysfs_ops = &brport_sysfs_ops,
210 .release = brport_release,
211};
212
213
214/*
215 * Add sysfs entries to ethernet device added to a bridge.
216 * Creates a brport subdirectory with bridge attributes.
217 * Puts symlink in bridge's brport subdirectory
218 */
219int br_sysfs_addif(struct net_bridge_port *p)
220{
221 struct net_bridge *br = p->br;
222 struct brport_attribute **a;
223 int err;
224
225 ASSERT_RTNL();
226
227 kobject_set_name(&p->kobj, SYSFS_BRIDGE_PORT_ATTR);
228 p->kobj.ktype = &brport_ktype;
229 p->kobj.parent = &(p->dev->class_dev.kobj);
230 p->kobj.kset = NULL;
231
232 err = kobject_add(&p->kobj);
233 if(err)
234 goto out1;
235
236 err = sysfs_create_link(&p->kobj, &br->dev->class_dev.kobj,
237 SYSFS_BRIDGE_PORT_LINK);
238 if (err)
239 goto out2;
240
241 for (a = brport_attrs; *a; ++a) {
242 err = sysfs_create_file(&p->kobj, &((*a)->attr));
243 if (err)
244 goto out2;
245 }
246
247 err = sysfs_create_link(&br->ifobj, &p->kobj, p->dev->name);
248 if (err)
249 goto out2;
250
251 return 0;
252 out2:
253 kobject_del(&p->kobj);
254 out1:
255 return err;
256}
257
258void br_sysfs_removeif(struct net_bridge_port *p)
259{
260 pr_debug("br_sysfs_removeif\n");
261 sysfs_remove_link(&p->br->ifobj, p->dev->name);
262 kobject_del(&p->kobj);
263}
264
265void br_sysfs_freeif(struct net_bridge_port *p)
266{
267 pr_debug("br_sysfs_freeif\n");
268 kobject_put(&p->kobj);
269}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-04 01:45:45 -0500