Commit | Line | Data |
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1da177e4 LT |
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 | ||
22 | struct 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) \ | |
29 | struct 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 | ||
37 | static ssize_t show_path_cost(struct net_bridge_port *p, char *buf) | |
38 | { | |
39 | return sprintf(buf, "%d\n", p->path_cost); | |
40 | } | |
41 | static 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 | } | |
46 | static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR, | |
47 | show_path_cost, store_path_cost); | |
48 | ||
49 | static ssize_t show_priority(struct net_bridge_port *p, char *buf) | |
50 | { | |
51 | return sprintf(buf, "%d\n", p->priority); | |
52 | } | |
53 | static 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 | } | |
60 | static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR, | |
61 | show_priority, store_priority); | |
62 | ||
63 | static ssize_t show_designated_root(struct net_bridge_port *p, char *buf) | |
64 | { | |
65 | return br_show_bridge_id(buf, &p->designated_root); | |
66 | } | |
67 | static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL); | |
68 | ||
69 | static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf) | |
70 | { | |
71 | return br_show_bridge_id(buf, &p->designated_bridge); | |
72 | } | |
73 | static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL); | |
74 | ||
75 | static ssize_t show_designated_port(struct net_bridge_port *p, char *buf) | |
76 | { | |
77 | return sprintf(buf, "%d\n", p->designated_port); | |
78 | } | |
79 | static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL); | |
80 | ||
81 | static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf) | |
82 | { | |
83 | return sprintf(buf, "%d\n", p->designated_cost); | |
84 | } | |
85 | static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL); | |
86 | ||
87 | static ssize_t show_port_id(struct net_bridge_port *p, char *buf) | |
88 | { | |
89 | return sprintf(buf, "0x%x\n", p->port_id); | |
90 | } | |
91 | static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL); | |
92 | ||
93 | static 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 | ||
98 | static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL); | |
99 | ||
100 | static ssize_t show_change_ack(struct net_bridge_port *p, char *buf) | |
101 | { | |
102 | return sprintf(buf, "%d\n", p->topology_change_ack); | |
103 | } | |
104 | static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL); | |
105 | ||
106 | static ssize_t show_config_pending(struct net_bridge_port *p, char *buf) | |
107 | { | |
108 | return sprintf(buf, "%d\n", p->config_pending); | |
109 | } | |
110 | static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL); | |
111 | ||
112 | static ssize_t show_port_state(struct net_bridge_port *p, char *buf) | |
113 | { | |
114 | return sprintf(buf, "%d\n", p->state); | |
115 | } | |
116 | static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL); | |
117 | ||
118 | static 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 | } | |
123 | static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL); | |
124 | ||
125 | static 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 | } | |
130 | static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL); | |
131 | ||
132 | static 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 | } | |
137 | static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL); | |
138 | ||
139 | static 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 | ||
160 | static 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 | ||
169 | static 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. */ | |
198 | static void brport_release(struct kobject *kobj) | |
199 | { | |
200 | kfree(container_of(kobj, struct net_bridge_port, kobj)); | |
201 | } | |
202 | ||
203 | static struct sysfs_ops brport_sysfs_ops = { | |
204 | .show = brport_show, | |
205 | .store = brport_store, | |
206 | }; | |
207 | ||
208 | static 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 | */ | |
219 | int 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 | ||
312c004d | 251 | kobject_uevent(&p->kobj, KOBJ_ADD); |
1da177e4 LT |
252 | return 0; |
253 | out2: | |
254 | kobject_del(&p->kobj); | |
255 | out1: | |
256 | return err; | |
257 | } | |
258 | ||
259 | void br_sysfs_removeif(struct net_bridge_port *p) | |
260 | { | |
261 | pr_debug("br_sysfs_removeif\n"); | |
262 | sysfs_remove_link(&p->br->ifobj, p->dev->name); | |
312c004d | 263 | kobject_uevent(&p->kobj, KOBJ_REMOVE); |
1da177e4 LT |
264 | kobject_del(&p->kobj); |
265 | } | |
266 | ||
267 | void br_sysfs_freeif(struct net_bridge_port *p) | |
268 | { | |
269 | pr_debug("br_sysfs_freeif\n"); | |
270 | kobject_put(&p->kobj); | |
271 | } |