Commit | Line | Data |
---|---|---|
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> | |
174cd4b1 | 20 | #include <linux/sched/signal.h> |
1da177e4 LT |
21 | |
22 | #include "br_private.h" | |
23 | ||
24 | struct brport_attribute { | |
25 | struct attribute attr; | |
26 | ssize_t (*show)(struct net_bridge_port *, char *); | |
14f98f25 | 27 | int (*store)(struct net_bridge_port *, unsigned long); |
1da177e4 LT |
28 | }; |
29 | ||
31a5b837 | 30 | #define BRPORT_ATTR(_name, _mode, _show, _store) \ |
5a0d513b | 31 | const struct brport_attribute brport_attr_##_name = { \ |
1da177e4 | 32 | .attr = {.name = __stringify(_name), \ |
7b595756 | 33 | .mode = _mode }, \ |
1da177e4 LT |
34 | .show = _show, \ |
35 | .store = _store, \ | |
36 | }; | |
37 | ||
cd753732 | 38 | #define BRPORT_ATTR_FLAG(_name, _mask) \ |
39 | static ssize_t show_##_name(struct net_bridge_port *p, char *buf) \ | |
40 | { \ | |
41 | return sprintf(buf, "%d\n", !!(p->flags & _mask)); \ | |
42 | } \ | |
43 | static int store_##_name(struct net_bridge_port *p, unsigned long v) \ | |
44 | { \ | |
63c3a622 | 45 | return store_flag(p, v, _mask); \ |
cd753732 | 46 | } \ |
d6444062 | 47 | static BRPORT_ATTR(_name, 0644, \ |
cd753732 | 48 | show_##_name, store_##_name) |
49 | ||
63c3a622 VY |
50 | static int store_flag(struct net_bridge_port *p, unsigned long v, |
51 | unsigned long mask) | |
52 | { | |
e028e4b8 VY |
53 | unsigned long flags; |
54 | ||
55 | flags = p->flags; | |
63c3a622 VY |
56 | |
57 | if (v) | |
58 | flags |= mask; | |
59 | else | |
60 | flags &= ~mask; | |
61 | ||
62 | if (flags != p->flags) { | |
63 | p->flags = flags; | |
e028e4b8 | 64 | br_port_flags_change(p, mask); |
63c3a622 VY |
65 | } |
66 | return 0; | |
67 | } | |
cd753732 | 68 | |
1da177e4 LT |
69 | static ssize_t show_path_cost(struct net_bridge_port *p, char *buf) |
70 | { | |
71 | return sprintf(buf, "%d\n", p->path_cost); | |
72 | } | |
14f98f25 | 73 | |
d6444062 | 74 | static BRPORT_ATTR(path_cost, 0644, |
14f98f25 | 75 | show_path_cost, br_stp_set_path_cost); |
1da177e4 LT |
76 | |
77 | static ssize_t show_priority(struct net_bridge_port *p, char *buf) | |
78 | { | |
79 | return sprintf(buf, "%d\n", p->priority); | |
80 | } | |
14f98f25 | 81 | |
d6444062 | 82 | static BRPORT_ATTR(priority, 0644, |
14f98f25 | 83 | show_priority, br_stp_set_port_priority); |
1da177e4 LT |
84 | |
85 | static ssize_t show_designated_root(struct net_bridge_port *p, char *buf) | |
86 | { | |
87 | return br_show_bridge_id(buf, &p->designated_root); | |
88 | } | |
d6444062 | 89 | static BRPORT_ATTR(designated_root, 0444, show_designated_root, NULL); |
1da177e4 LT |
90 | |
91 | static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf) | |
92 | { | |
93 | return br_show_bridge_id(buf, &p->designated_bridge); | |
94 | } | |
d6444062 | 95 | static BRPORT_ATTR(designated_bridge, 0444, show_designated_bridge, NULL); |
1da177e4 LT |
96 | |
97 | static ssize_t show_designated_port(struct net_bridge_port *p, char *buf) | |
98 | { | |
99 | return sprintf(buf, "%d\n", p->designated_port); | |
100 | } | |
d6444062 | 101 | static BRPORT_ATTR(designated_port, 0444, show_designated_port, NULL); |
1da177e4 LT |
102 | |
103 | static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf) | |
104 | { | |
105 | return sprintf(buf, "%d\n", p->designated_cost); | |
106 | } | |
d6444062 | 107 | static BRPORT_ATTR(designated_cost, 0444, show_designated_cost, NULL); |
1da177e4 LT |
108 | |
109 | static ssize_t show_port_id(struct net_bridge_port *p, char *buf) | |
110 | { | |
111 | return sprintf(buf, "0x%x\n", p->port_id); | |
112 | } | |
d6444062 | 113 | static BRPORT_ATTR(port_id, 0444, show_port_id, NULL); |
1da177e4 LT |
114 | |
115 | static ssize_t show_port_no(struct net_bridge_port *p, char *buf) | |
116 | { | |
117 | return sprintf(buf, "0x%x\n", p->port_no); | |
118 | } | |
119 | ||
d6444062 | 120 | static BRPORT_ATTR(port_no, 0444, show_port_no, NULL); |
1da177e4 LT |
121 | |
122 | static ssize_t show_change_ack(struct net_bridge_port *p, char *buf) | |
123 | { | |
124 | return sprintf(buf, "%d\n", p->topology_change_ack); | |
125 | } | |
d6444062 | 126 | static BRPORT_ATTR(change_ack, 0444, show_change_ack, NULL); |
1da177e4 LT |
127 | |
128 | static ssize_t show_config_pending(struct net_bridge_port *p, char *buf) | |
129 | { | |
130 | return sprintf(buf, "%d\n", p->config_pending); | |
131 | } | |
d6444062 | 132 | static BRPORT_ATTR(config_pending, 0444, show_config_pending, NULL); |
1da177e4 LT |
133 | |
134 | static ssize_t show_port_state(struct net_bridge_port *p, char *buf) | |
135 | { | |
136 | return sprintf(buf, "%d\n", p->state); | |
137 | } | |
d6444062 | 138 | static BRPORT_ATTR(state, 0444, show_port_state, NULL); |
1da177e4 LT |
139 | |
140 | static ssize_t show_message_age_timer(struct net_bridge_port *p, | |
141 | char *buf) | |
142 | { | |
143 | return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer)); | |
144 | } | |
d6444062 | 145 | static BRPORT_ATTR(message_age_timer, 0444, show_message_age_timer, NULL); |
1da177e4 LT |
146 | |
147 | static ssize_t show_forward_delay_timer(struct net_bridge_port *p, | |
148 | char *buf) | |
149 | { | |
150 | return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer)); | |
151 | } | |
d6444062 | 152 | static BRPORT_ATTR(forward_delay_timer, 0444, show_forward_delay_timer, NULL); |
1da177e4 LT |
153 | |
154 | static ssize_t show_hold_timer(struct net_bridge_port *p, | |
155 | char *buf) | |
156 | { | |
157 | return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer)); | |
158 | } | |
d6444062 | 159 | static BRPORT_ATTR(hold_timer, 0444, show_hold_timer, NULL); |
1da177e4 | 160 | |
14f98f25 | 161 | static int store_flush(struct net_bridge_port *p, unsigned long v) |
9cf63747 | 162 | { |
1ea2d020 | 163 | br_fdb_delete_by_port(p->br, p, 0, 0); // Don't delete local entry |
9cf63747 SH |
164 | return 0; |
165 | } | |
d6444062 | 166 | static BRPORT_ATTR(flush, 0200, NULL, store_flush); |
9cf63747 | 167 | |
5af48b59 NA |
168 | static ssize_t show_group_fwd_mask(struct net_bridge_port *p, char *buf) |
169 | { | |
170 | return sprintf(buf, "%#x\n", p->group_fwd_mask); | |
171 | } | |
172 | ||
173 | static int store_group_fwd_mask(struct net_bridge_port *p, | |
174 | unsigned long v) | |
175 | { | |
176 | if (v & BR_GROUPFWD_MACPAUSE) | |
177 | return -EINVAL; | |
178 | p->group_fwd_mask = v; | |
179 | ||
180 | return 0; | |
181 | } | |
d6444062 | 182 | static BRPORT_ATTR(group_fwd_mask, 0644, show_group_fwd_mask, |
5af48b59 NA |
183 | store_group_fwd_mask); |
184 | ||
cd753732 | 185 | BRPORT_ATTR_FLAG(hairpin_mode, BR_HAIRPIN_MODE); |
a2e01a65 | 186 | BRPORT_ATTR_FLAG(bpdu_guard, BR_BPDU_GUARD); |
1007dd1a | 187 | BRPORT_ATTR_FLAG(root_block, BR_ROOT_BLOCK); |
9ba18891 | 188 | BRPORT_ATTR_FLAG(learning, BR_LEARNING); |
867a5943 | 189 | BRPORT_ATTR_FLAG(unicast_flood, BR_FLOOD); |
95850116 | 190 | BRPORT_ATTR_FLAG(proxyarp, BR_PROXYARP); |
842a9ae0 | 191 | BRPORT_ATTR_FLAG(proxyarp_wifi, BR_PROXYARP_WIFI); |
b6cb5ac8 | 192 | BRPORT_ATTR_FLAG(multicast_flood, BR_MCAST_FLOOD); |
99f906e9 | 193 | BRPORT_ATTR_FLAG(broadcast_flood, BR_BCAST_FLOOD); |
821f1b21 | 194 | BRPORT_ATTR_FLAG(neigh_suppress, BR_NEIGH_SUPPRESS); |
3982d3d2 | 195 | |
0909e117 HX |
196 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
197 | static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf) | |
198 | { | |
199 | return sprintf(buf, "%d\n", p->multicast_router); | |
200 | } | |
201 | ||
14f98f25 | 202 | static int store_multicast_router(struct net_bridge_port *p, |
0909e117 HX |
203 | unsigned long v) |
204 | { | |
205 | return br_multicast_set_port_router(p, v); | |
206 | } | |
d6444062 | 207 | static BRPORT_ATTR(multicast_router, 0644, show_multicast_router, |
0909e117 | 208 | store_multicast_router); |
50426b59 | 209 | |
c2d3babf | 210 | BRPORT_ATTR_FLAG(multicast_fast_leave, BR_MULTICAST_FAST_LEAVE); |
6db6f0ea | 211 | BRPORT_ATTR_FLAG(multicast_to_unicast, BR_MULTICAST_TO_UNICAST); |
0909e117 HX |
212 | #endif |
213 | ||
5a0d513b | 214 | static const struct brport_attribute *brport_attrs[] = { |
1da177e4 LT |
215 | &brport_attr_path_cost, |
216 | &brport_attr_priority, | |
217 | &brport_attr_port_id, | |
218 | &brport_attr_port_no, | |
219 | &brport_attr_designated_root, | |
220 | &brport_attr_designated_bridge, | |
221 | &brport_attr_designated_port, | |
222 | &brport_attr_designated_cost, | |
223 | &brport_attr_state, | |
224 | &brport_attr_change_ack, | |
225 | &brport_attr_config_pending, | |
226 | &brport_attr_message_age_timer, | |
227 | &brport_attr_forward_delay_timer, | |
228 | &brport_attr_hold_timer, | |
9cf63747 | 229 | &brport_attr_flush, |
3982d3d2 | 230 | &brport_attr_hairpin_mode, |
a2e01a65 | 231 | &brport_attr_bpdu_guard, |
1007dd1a | 232 | &brport_attr_root_block, |
9ba18891 | 233 | &brport_attr_learning, |
867a5943 | 234 | &brport_attr_unicast_flood, |
0909e117 HX |
235 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
236 | &brport_attr_multicast_router, | |
50426b59 | 237 | &brport_attr_multicast_fast_leave, |
6db6f0ea | 238 | &brport_attr_multicast_to_unicast, |
0909e117 | 239 | #endif |
95850116 | 240 | &brport_attr_proxyarp, |
842a9ae0 | 241 | &brport_attr_proxyarp_wifi, |
4eb6753c | 242 | &brport_attr_multicast_flood, |
99f906e9 | 243 | &brport_attr_broadcast_flood, |
5af48b59 | 244 | &brport_attr_group_fwd_mask, |
821f1b21 | 245 | &brport_attr_neigh_suppress, |
1da177e4 LT |
246 | NULL |
247 | }; | |
248 | ||
249 | #define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr) | |
250 | #define to_brport(obj) container_of(obj, struct net_bridge_port, kobj) | |
251 | ||
56b148eb | 252 | static ssize_t brport_show(struct kobject *kobj, |
253 | struct attribute *attr, char *buf) | |
1da177e4 | 254 | { |
56b148eb | 255 | struct brport_attribute *brport_attr = to_brport_attr(attr); |
256 | struct net_bridge_port *p = to_brport(kobj); | |
1da177e4 | 257 | |
1b12580a XL |
258 | if (!brport_attr->show) |
259 | return -EINVAL; | |
260 | ||
1da177e4 LT |
261 | return brport_attr->show(p, buf); |
262 | } | |
263 | ||
56b148eb | 264 | static ssize_t brport_store(struct kobject *kobj, |
265 | struct attribute *attr, | |
266 | const char *buf, size_t count) | |
1da177e4 | 267 | { |
56b148eb | 268 | struct brport_attribute *brport_attr = to_brport_attr(attr); |
269 | struct net_bridge_port *p = to_brport(kobj); | |
1da177e4 LT |
270 | ssize_t ret = -EINVAL; |
271 | char *endp; | |
272 | unsigned long val; | |
273 | ||
cb990503 | 274 | if (!ns_capable(dev_net(p->dev)->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
275 | return -EPERM; |
276 | ||
277 | val = simple_strtoul(buf, &endp, 0); | |
278 | if (endp != buf) { | |
af38f298 EB |
279 | if (!rtnl_trylock()) |
280 | return restart_syscall(); | |
1da177e4 LT |
281 | if (p->dev && p->br && brport_attr->store) { |
282 | spin_lock_bh(&p->br->lock); | |
283 | ret = brport_attr->store(p, val); | |
284 | spin_unlock_bh(&p->br->lock); | |
bdaf0d5d | 285 | if (!ret) { |
92899063 | 286 | br_ifinfo_notify(RTM_NEWLINK, NULL, p); |
1da177e4 | 287 | ret = count; |
bdaf0d5d | 288 | } |
1da177e4 LT |
289 | } |
290 | rtnl_unlock(); | |
291 | } | |
292 | return ret; | |
293 | } | |
294 | ||
52cf25d0 | 295 | const struct sysfs_ops brport_sysfs_ops = { |
1da177e4 LT |
296 | .show = brport_show, |
297 | .store = brport_store, | |
298 | }; | |
299 | ||
1da177e4 LT |
300 | /* |
301 | * Add sysfs entries to ethernet device added to a bridge. | |
302 | * Creates a brport subdirectory with bridge attributes. | |
e0f43752 | 303 | * Puts symlink in bridge's brif subdirectory |
1da177e4 LT |
304 | */ |
305 | int br_sysfs_addif(struct net_bridge_port *p) | |
306 | { | |
307 | struct net_bridge *br = p->br; | |
5a0d513b | 308 | const struct brport_attribute **a; |
1da177e4 LT |
309 | int err; |
310 | ||
43cb76d9 | 311 | err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj, |
1da177e4 LT |
312 | SYSFS_BRIDGE_PORT_LINK); |
313 | if (err) | |
e0f43752 | 314 | return err; |
1da177e4 LT |
315 | |
316 | for (a = brport_attrs; *a; ++a) { | |
317 | err = sysfs_create_file(&p->kobj, &((*a)->attr)); | |
318 | if (err) | |
e0f43752 | 319 | return err; |
1da177e4 LT |
320 | } |
321 | ||
e0f43752 SA |
322 | strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ); |
323 | return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name); | |
324 | } | |
325 | ||
326 | /* Rename bridge's brif symlink */ | |
327 | int br_sysfs_renameif(struct net_bridge_port *p) | |
328 | { | |
329 | struct net_bridge *br = p->br; | |
330 | int err; | |
331 | ||
332 | /* If a rename fails, the rollback will cause another | |
333 | * rename call with the existing name. | |
334 | */ | |
335 | if (!strncmp(p->sysfs_name, p->dev->name, IFNAMSIZ)) | |
336 | return 0; | |
337 | ||
338 | err = sysfs_rename_link(br->ifobj, &p->kobj, | |
339 | p->sysfs_name, p->dev->name); | |
340 | if (err) | |
341 | netdev_notice(br->dev, "unable to rename link %s to %s", | |
342 | p->sysfs_name, p->dev->name); | |
343 | else | |
344 | strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ); | |
345 | ||
1da177e4 LT |
346 | return err; |
347 | } |