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 | ||
4fc268d2 | 14 | #include <linux/capability.h> |
1da177e4 LT |
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> | |
20 | ||
21 | #include "br_private.h" | |
22 | ||
23 | struct brport_attribute { | |
24 | struct attribute attr; | |
25 | ssize_t (*show)(struct net_bridge_port *, char *); | |
14f98f25 | 26 | int (*store)(struct net_bridge_port *, unsigned long); |
1da177e4 LT |
27 | }; |
28 | ||
29 | #define BRPORT_ATTR(_name,_mode,_show,_store) \ | |
5a0d513b | 30 | const struct brport_attribute brport_attr_##_name = { \ |
1da177e4 | 31 | .attr = {.name = __stringify(_name), \ |
7b595756 | 32 | .mode = _mode }, \ |
1da177e4 LT |
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 | } | |
14f98f25 | 41 | |
1da177e4 | 42 | static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR, |
14f98f25 | 43 | show_path_cost, br_stp_set_path_cost); |
1da177e4 LT |
44 | |
45 | static ssize_t show_priority(struct net_bridge_port *p, char *buf) | |
46 | { | |
47 | return sprintf(buf, "%d\n", p->priority); | |
48 | } | |
14f98f25 | 49 | |
1da177e4 | 50 | static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR, |
14f98f25 | 51 | show_priority, br_stp_set_port_priority); |
1da177e4 LT |
52 | |
53 | static ssize_t show_designated_root(struct net_bridge_port *p, char *buf) | |
54 | { | |
55 | return br_show_bridge_id(buf, &p->designated_root); | |
56 | } | |
57 | static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL); | |
58 | ||
59 | static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf) | |
60 | { | |
61 | return br_show_bridge_id(buf, &p->designated_bridge); | |
62 | } | |
63 | static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL); | |
64 | ||
65 | static ssize_t show_designated_port(struct net_bridge_port *p, char *buf) | |
66 | { | |
67 | return sprintf(buf, "%d\n", p->designated_port); | |
68 | } | |
69 | static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL); | |
70 | ||
71 | static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf) | |
72 | { | |
73 | return sprintf(buf, "%d\n", p->designated_cost); | |
74 | } | |
75 | static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL); | |
76 | ||
77 | static ssize_t show_port_id(struct net_bridge_port *p, char *buf) | |
78 | { | |
79 | return sprintf(buf, "0x%x\n", p->port_id); | |
80 | } | |
81 | static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL); | |
82 | ||
83 | static ssize_t show_port_no(struct net_bridge_port *p, char *buf) | |
84 | { | |
85 | return sprintf(buf, "0x%x\n", p->port_no); | |
86 | } | |
87 | ||
88 | static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL); | |
89 | ||
90 | static ssize_t show_change_ack(struct net_bridge_port *p, char *buf) | |
91 | { | |
92 | return sprintf(buf, "%d\n", p->topology_change_ack); | |
93 | } | |
94 | static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL); | |
95 | ||
96 | static ssize_t show_config_pending(struct net_bridge_port *p, char *buf) | |
97 | { | |
98 | return sprintf(buf, "%d\n", p->config_pending); | |
99 | } | |
100 | static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL); | |
101 | ||
102 | static ssize_t show_port_state(struct net_bridge_port *p, char *buf) | |
103 | { | |
104 | return sprintf(buf, "%d\n", p->state); | |
105 | } | |
106 | static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL); | |
107 | ||
108 | static ssize_t show_message_age_timer(struct net_bridge_port *p, | |
109 | char *buf) | |
110 | { | |
111 | return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer)); | |
112 | } | |
113 | static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL); | |
114 | ||
115 | static ssize_t show_forward_delay_timer(struct net_bridge_port *p, | |
116 | char *buf) | |
117 | { | |
118 | return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer)); | |
119 | } | |
120 | static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL); | |
121 | ||
122 | static ssize_t show_hold_timer(struct net_bridge_port *p, | |
123 | char *buf) | |
124 | { | |
125 | return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer)); | |
126 | } | |
127 | static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL); | |
128 | ||
14f98f25 | 129 | static int store_flush(struct net_bridge_port *p, unsigned long v) |
9cf63747 SH |
130 | { |
131 | br_fdb_delete_by_port(p->br, p, 0); // Don't delete local entry | |
132 | return 0; | |
133 | } | |
134 | static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush); | |
135 | ||
3982d3d2 FA |
136 | static ssize_t show_hairpin_mode(struct net_bridge_port *p, char *buf) |
137 | { | |
138 | int hairpin_mode = (p->flags & BR_HAIRPIN_MODE) ? 1 : 0; | |
139 | return sprintf(buf, "%d\n", hairpin_mode); | |
140 | } | |
14f98f25 | 141 | static int store_hairpin_mode(struct net_bridge_port *p, unsigned long v) |
3982d3d2 FA |
142 | { |
143 | if (v) | |
144 | p->flags |= BR_HAIRPIN_MODE; | |
145 | else | |
146 | p->flags &= ~BR_HAIRPIN_MODE; | |
147 | return 0; | |
148 | } | |
149 | static BRPORT_ATTR(hairpin_mode, S_IRUGO | S_IWUSR, | |
150 | show_hairpin_mode, store_hairpin_mode); | |
151 | ||
0909e117 HX |
152 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
153 | static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf) | |
154 | { | |
155 | return sprintf(buf, "%d\n", p->multicast_router); | |
156 | } | |
157 | ||
14f98f25 | 158 | static int store_multicast_router(struct net_bridge_port *p, |
0909e117 HX |
159 | unsigned long v) |
160 | { | |
161 | return br_multicast_set_port_router(p, v); | |
162 | } | |
163 | static BRPORT_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router, | |
164 | store_multicast_router); | |
165 | #endif | |
166 | ||
5a0d513b | 167 | static const struct brport_attribute *brport_attrs[] = { |
1da177e4 LT |
168 | &brport_attr_path_cost, |
169 | &brport_attr_priority, | |
170 | &brport_attr_port_id, | |
171 | &brport_attr_port_no, | |
172 | &brport_attr_designated_root, | |
173 | &brport_attr_designated_bridge, | |
174 | &brport_attr_designated_port, | |
175 | &brport_attr_designated_cost, | |
176 | &brport_attr_state, | |
177 | &brport_attr_change_ack, | |
178 | &brport_attr_config_pending, | |
179 | &brport_attr_message_age_timer, | |
180 | &brport_attr_forward_delay_timer, | |
181 | &brport_attr_hold_timer, | |
9cf63747 | 182 | &brport_attr_flush, |
3982d3d2 | 183 | &brport_attr_hairpin_mode, |
0909e117 HX |
184 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
185 | &brport_attr_multicast_router, | |
186 | #endif | |
1da177e4 LT |
187 | NULL |
188 | }; | |
189 | ||
190 | #define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr) | |
191 | #define to_brport(obj) container_of(obj, struct net_bridge_port, kobj) | |
192 | ||
193 | static ssize_t brport_show(struct kobject * kobj, | |
194 | struct attribute * attr, char * buf) | |
195 | { | |
196 | struct brport_attribute * brport_attr = to_brport_attr(attr); | |
197 | struct net_bridge_port * p = to_brport(kobj); | |
198 | ||
199 | return brport_attr->show(p, buf); | |
200 | } | |
201 | ||
202 | static ssize_t brport_store(struct kobject * kobj, | |
203 | struct attribute * attr, | |
204 | const char * buf, size_t count) | |
205 | { | |
206 | struct brport_attribute * brport_attr = to_brport_attr(attr); | |
207 | struct net_bridge_port * p = to_brport(kobj); | |
208 | ssize_t ret = -EINVAL; | |
209 | char *endp; | |
210 | unsigned long val; | |
211 | ||
212 | if (!capable(CAP_NET_ADMIN)) | |
213 | return -EPERM; | |
214 | ||
215 | val = simple_strtoul(buf, &endp, 0); | |
216 | if (endp != buf) { | |
af38f298 EB |
217 | if (!rtnl_trylock()) |
218 | return restart_syscall(); | |
1da177e4 LT |
219 | if (p->dev && p->br && brport_attr->store) { |
220 | spin_lock_bh(&p->br->lock); | |
221 | ret = brport_attr->store(p, val); | |
222 | spin_unlock_bh(&p->br->lock); | |
223 | if (ret == 0) | |
224 | ret = count; | |
225 | } | |
226 | rtnl_unlock(); | |
227 | } | |
228 | return ret; | |
229 | } | |
230 | ||
52cf25d0 | 231 | const struct sysfs_ops brport_sysfs_ops = { |
1da177e4 LT |
232 | .show = brport_show, |
233 | .store = brport_store, | |
234 | }; | |
235 | ||
1da177e4 LT |
236 | /* |
237 | * Add sysfs entries to ethernet device added to a bridge. | |
238 | * Creates a brport subdirectory with bridge attributes. | |
e0f43752 | 239 | * Puts symlink in bridge's brif subdirectory |
1da177e4 LT |
240 | */ |
241 | int br_sysfs_addif(struct net_bridge_port *p) | |
242 | { | |
243 | struct net_bridge *br = p->br; | |
5a0d513b | 244 | const struct brport_attribute **a; |
1da177e4 LT |
245 | int err; |
246 | ||
43cb76d9 | 247 | err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj, |
1da177e4 LT |
248 | SYSFS_BRIDGE_PORT_LINK); |
249 | if (err) | |
e0f43752 | 250 | return err; |
1da177e4 LT |
251 | |
252 | for (a = brport_attrs; *a; ++a) { | |
253 | err = sysfs_create_file(&p->kobj, &((*a)->attr)); | |
254 | if (err) | |
e0f43752 | 255 | return err; |
1da177e4 LT |
256 | } |
257 | ||
e0f43752 SA |
258 | strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ); |
259 | return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name); | |
260 | } | |
261 | ||
262 | /* Rename bridge's brif symlink */ | |
263 | int br_sysfs_renameif(struct net_bridge_port *p) | |
264 | { | |
265 | struct net_bridge *br = p->br; | |
266 | int err; | |
267 | ||
268 | /* If a rename fails, the rollback will cause another | |
269 | * rename call with the existing name. | |
270 | */ | |
271 | if (!strncmp(p->sysfs_name, p->dev->name, IFNAMSIZ)) | |
272 | return 0; | |
273 | ||
274 | err = sysfs_rename_link(br->ifobj, &p->kobj, | |
275 | p->sysfs_name, p->dev->name); | |
276 | if (err) | |
277 | netdev_notice(br->dev, "unable to rename link %s to %s", | |
278 | p->sysfs_name, p->dev->name); | |
279 | else | |
280 | strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ); | |
281 | ||
1da177e4 LT |
282 | return err; |
283 | } |