blob: f99c5bf5c906270e00c1e96177970ac15fdcbc71 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Randy Dunlap4fc268d2006-01-11 12:17:47 -080014#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#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>
Ingo Molnar174cd4b2017-02-02 19:15:33 +010020#include <linux/sched/signal.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
22#include "br_private.h"
23
24struct brport_attribute {
25 struct attribute attr;
26 ssize_t (*show)(struct net_bridge_port *, char *);
stephen hemminger14f98f22011-04-04 14:03:33 +000027 int (*store)(struct net_bridge_port *, unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -070028};
29
tanxiaojun31a5b832013-12-19 13:28:12 +080030#define BRPORT_ATTR(_name, _mode, _show, _store) \
stephen hemminger5a0d5132012-07-30 08:55:49 +000031const struct brport_attribute brport_attr_##_name = { \
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 .attr = {.name = __stringify(_name), \
Tejun Heo7b595752007-06-14 03:45:17 +090033 .mode = _mode }, \
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 .show = _show, \
35 .store = _store, \
36};
37
stephen hemmingercd753732012-11-13 07:53:06 +000038#define BRPORT_ATTR_FLAG(_name, _mask) \
39static ssize_t show_##_name(struct net_bridge_port *p, char *buf) \
40{ \
41 return sprintf(buf, "%d\n", !!(p->flags & _mask)); \
42} \
43static int store_##_name(struct net_bridge_port *p, unsigned long v) \
44{ \
Vlad Yasevich63c3a622014-05-16 09:59:15 -040045 return store_flag(p, v, _mask); \
stephen hemmingercd753732012-11-13 07:53:06 +000046} \
Joe Perchesd6444062018-03-23 15:54:38 -070047static BRPORT_ATTR(_name, 0644, \
stephen hemmingercd753732012-11-13 07:53:06 +000048 show_##_name, store_##_name)
49
Vlad Yasevich63c3a622014-05-16 09:59:15 -040050static int store_flag(struct net_bridge_port *p, unsigned long v,
51 unsigned long mask)
52{
Vlad Yaseviche028e4b2014-05-16 09:59:16 -040053 unsigned long flags;
54
55 flags = p->flags;
Vlad Yasevich63c3a622014-05-16 09:59:15 -040056
57 if (v)
58 flags |= mask;
59 else
60 flags &= ~mask;
61
62 if (flags != p->flags) {
63 p->flags = flags;
Vlad Yaseviche028e4b2014-05-16 09:59:16 -040064 br_port_flags_change(p, mask);
Vlad Yasevich63c3a622014-05-16 09:59:15 -040065 }
66 return 0;
67}
stephen hemmingercd753732012-11-13 07:53:06 +000068
Linus Torvalds1da177e2005-04-16 15:20:36 -070069static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
70{
71 return sprintf(buf, "%d\n", p->path_cost);
72}
stephen hemminger14f98f22011-04-04 14:03:33 +000073
Joe Perchesd6444062018-03-23 15:54:38 -070074static BRPORT_ATTR(path_cost, 0644,
stephen hemminger14f98f22011-04-04 14:03:33 +000075 show_path_cost, br_stp_set_path_cost);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77static ssize_t show_priority(struct net_bridge_port *p, char *buf)
78{
79 return sprintf(buf, "%d\n", p->priority);
80}
stephen hemminger14f98f22011-04-04 14:03:33 +000081
Joe Perchesd6444062018-03-23 15:54:38 -070082static BRPORT_ATTR(priority, 0644,
stephen hemminger14f98f22011-04-04 14:03:33 +000083 show_priority, br_stp_set_port_priority);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
85static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
86{
87 return br_show_bridge_id(buf, &p->designated_root);
88}
Joe Perchesd6444062018-03-23 15:54:38 -070089static BRPORT_ATTR(designated_root, 0444, show_designated_root, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
92{
93 return br_show_bridge_id(buf, &p->designated_bridge);
94}
Joe Perchesd6444062018-03-23 15:54:38 -070095static BRPORT_ATTR(designated_bridge, 0444, show_designated_bridge, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
97static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
98{
99 return sprintf(buf, "%d\n", p->designated_port);
100}
Joe Perchesd6444062018-03-23 15:54:38 -0700101static BRPORT_ATTR(designated_port, 0444, show_designated_port, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
103static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
104{
105 return sprintf(buf, "%d\n", p->designated_cost);
106}
Joe Perchesd6444062018-03-23 15:54:38 -0700107static BRPORT_ATTR(designated_cost, 0444, show_designated_cost, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
109static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
110{
111 return sprintf(buf, "0x%x\n", p->port_id);
112}
Joe Perchesd6444062018-03-23 15:54:38 -0700113static BRPORT_ATTR(port_id, 0444, show_port_id, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
115static 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
Joe Perchesd6444062018-03-23 15:54:38 -0700120static BRPORT_ATTR(port_no, 0444, show_port_no, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
122static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
123{
124 return sprintf(buf, "%d\n", p->topology_change_ack);
125}
Joe Perchesd6444062018-03-23 15:54:38 -0700126static BRPORT_ATTR(change_ack, 0444, show_change_ack, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
128static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
129{
130 return sprintf(buf, "%d\n", p->config_pending);
131}
Joe Perchesd6444062018-03-23 15:54:38 -0700132static BRPORT_ATTR(config_pending, 0444, show_config_pending, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
134static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
135{
136 return sprintf(buf, "%d\n", p->state);
137}
Joe Perchesd6444062018-03-23 15:54:38 -0700138static BRPORT_ATTR(state, 0444, show_port_state, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140static 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}
Joe Perchesd6444062018-03-23 15:54:38 -0700145static BRPORT_ATTR(message_age_timer, 0444, show_message_age_timer, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
147static 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}
Joe Perchesd6444062018-03-23 15:54:38 -0700152static BRPORT_ATTR(forward_delay_timer, 0444, show_forward_delay_timer, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
154static 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}
Joe Perchesd6444062018-03-23 15:54:38 -0700159static BRPORT_ATTR(hold_timer, 0444, show_hold_timer, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
stephen hemminger14f98f22011-04-04 14:03:33 +0000161static int store_flush(struct net_bridge_port *p, unsigned long v)
Stephen Hemminger9cf63742007-04-09 12:57:54 -0700162{
Nikolay Aleksandrov1ea2d022015-06-23 05:28:16 -0700163 br_fdb_delete_by_port(p->br, p, 0, 0); // Don't delete local entry
Stephen Hemminger9cf63742007-04-09 12:57:54 -0700164 return 0;
165}
Joe Perchesd6444062018-03-23 15:54:38 -0700166static BRPORT_ATTR(flush, 0200, NULL, store_flush);
Stephen Hemminger9cf63742007-04-09 12:57:54 -0700167
Nikolay Aleksandrov5af48b52017-09-27 16:12:44 +0300168static 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
173static 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}
Joe Perchesd6444062018-03-23 15:54:38 -0700182static BRPORT_ATTR(group_fwd_mask, 0644, show_group_fwd_mask,
Nikolay Aleksandrov5af48b52017-09-27 16:12:44 +0300183 store_group_fwd_mask);
184
stephen hemmingercd753732012-11-13 07:53:06 +0000185BRPORT_ATTR_FLAG(hairpin_mode, BR_HAIRPIN_MODE);
stephen hemmingera2e01a62012-11-13 07:53:07 +0000186BRPORT_ATTR_FLAG(bpdu_guard, BR_BPDU_GUARD);
stephen hemminger1007dd12012-11-13 07:53:08 +0000187BRPORT_ATTR_FLAG(root_block, BR_ROOT_BLOCK);
Vlad Yasevich9ba18892013-06-05 10:08:00 -0400188BRPORT_ATTR_FLAG(learning, BR_LEARNING);
Vlad Yasevich867a5942013-06-05 10:08:01 -0400189BRPORT_ATTR_FLAG(unicast_flood, BR_FLOOD);
Kyeyoon Park95850112014-10-23 14:49:17 -0700190BRPORT_ATTR_FLAG(proxyarp, BR_PROXYARP);
Jouni Malinen842a9ae2015-03-04 12:54:21 +0200191BRPORT_ATTR_FLAG(proxyarp_wifi, BR_PROXYARP_WIFI);
Nikolay Aleksandrovb6cb5ac2016-08-31 15:36:52 +0200192BRPORT_ATTR_FLAG(multicast_flood, BR_MCAST_FLOOD);
Mike Manning99f906e2017-04-26 14:48:09 +0100193BRPORT_ATTR_FLAG(broadcast_flood, BR_BCAST_FLOOD);
Roopa Prabhu821f1b22017-10-06 22:12:37 -0700194BRPORT_ATTR_FLAG(neigh_suppress, BR_NEIGH_SUPPRESS);
Nikolay Aleksandrov7d850ab2018-05-24 11:56:48 +0300195BRPORT_ATTR_FLAG(isolated, BR_ISOLATED);
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000196
Herbert Xu0909e112010-02-27 19:41:49 +0000197#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
198static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
199{
200 return sprintf(buf, "%d\n", p->multicast_router);
201}
202
stephen hemminger14f98f22011-04-04 14:03:33 +0000203static int store_multicast_router(struct net_bridge_port *p,
Herbert Xu0909e112010-02-27 19:41:49 +0000204 unsigned long v)
205{
206 return br_multicast_set_port_router(p, v);
207}
Joe Perchesd6444062018-03-23 15:54:38 -0700208static BRPORT_ATTR(multicast_router, 0644, show_multicast_router,
Herbert Xu0909e112010-02-27 19:41:49 +0000209 store_multicast_router);
Amerigo Wang50426b52012-12-03 23:56:40 +0000210
David S. Millerc2d3bab2012-12-05 16:24:45 -0500211BRPORT_ATTR_FLAG(multicast_fast_leave, BR_MULTICAST_FAST_LEAVE);
Felix Fietkau6db6f0e2017-01-21 21:01:32 +0100212BRPORT_ATTR_FLAG(multicast_to_unicast, BR_MULTICAST_TO_UNICAST);
Herbert Xu0909e112010-02-27 19:41:49 +0000213#endif
214
stephen hemminger5a0d5132012-07-30 08:55:49 +0000215static const struct brport_attribute *brport_attrs[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 &brport_attr_path_cost,
217 &brport_attr_priority,
218 &brport_attr_port_id,
219 &brport_attr_port_no,
220 &brport_attr_designated_root,
221 &brport_attr_designated_bridge,
222 &brport_attr_designated_port,
223 &brport_attr_designated_cost,
224 &brport_attr_state,
225 &brport_attr_change_ack,
226 &brport_attr_config_pending,
227 &brport_attr_message_age_timer,
228 &brport_attr_forward_delay_timer,
229 &brport_attr_hold_timer,
Stephen Hemminger9cf63742007-04-09 12:57:54 -0700230 &brport_attr_flush,
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000231 &brport_attr_hairpin_mode,
stephen hemmingera2e01a62012-11-13 07:53:07 +0000232 &brport_attr_bpdu_guard,
stephen hemminger1007dd12012-11-13 07:53:08 +0000233 &brport_attr_root_block,
Vlad Yasevich9ba18892013-06-05 10:08:00 -0400234 &brport_attr_learning,
Vlad Yasevich867a5942013-06-05 10:08:01 -0400235 &brport_attr_unicast_flood,
Herbert Xu0909e112010-02-27 19:41:49 +0000236#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
237 &brport_attr_multicast_router,
Amerigo Wang50426b52012-12-03 23:56:40 +0000238 &brport_attr_multicast_fast_leave,
Felix Fietkau6db6f0e2017-01-21 21:01:32 +0100239 &brport_attr_multicast_to_unicast,
Herbert Xu0909e112010-02-27 19:41:49 +0000240#endif
Kyeyoon Park95850112014-10-23 14:49:17 -0700241 &brport_attr_proxyarp,
Jouni Malinen842a9ae2015-03-04 12:54:21 +0200242 &brport_attr_proxyarp_wifi,
Nikolay Aleksandrov4eb67532016-10-13 15:20:52 +0200243 &brport_attr_multicast_flood,
Mike Manning99f906e2017-04-26 14:48:09 +0100244 &brport_attr_broadcast_flood,
Nikolay Aleksandrov5af48b52017-09-27 16:12:44 +0300245 &brport_attr_group_fwd_mask,
Roopa Prabhu821f1b22017-10-06 22:12:37 -0700246 &brport_attr_neigh_suppress,
Nikolay Aleksandrov7d850ab2018-05-24 11:56:48 +0300247 &brport_attr_isolated,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 NULL
249};
250
251#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
252#define to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
253
tanxiaojun56b148e2013-12-19 13:28:13 +0800254static ssize_t brport_show(struct kobject *kobj,
255 struct attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256{
tanxiaojun56b148e2013-12-19 13:28:13 +0800257 struct brport_attribute *brport_attr = to_brport_attr(attr);
258 struct net_bridge_port *p = to_brport(kobj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
Xin Long1b125802018-02-12 17:15:40 +0800260 if (!brport_attr->show)
261 return -EINVAL;
262
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 return brport_attr->show(p, buf);
264}
265
tanxiaojun56b148e2013-12-19 13:28:13 +0800266static ssize_t brport_store(struct kobject *kobj,
267 struct attribute *attr,
268 const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269{
tanxiaojun56b148e2013-12-19 13:28:13 +0800270 struct brport_attribute *brport_attr = to_brport_attr(attr);
271 struct net_bridge_port *p = to_brport(kobj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 ssize_t ret = -EINVAL;
273 char *endp;
274 unsigned long val;
275
Eric W. Biedermancb990502012-11-16 03:03:08 +0000276 if (!ns_capable(dev_net(p->dev)->user_ns, CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 return -EPERM;
278
279 val = simple_strtoul(buf, &endp, 0);
280 if (endp != buf) {
Eric W. Biedermanaf38f292009-05-13 17:00:41 +0000281 if (!rtnl_trylock())
282 return restart_syscall();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 if (p->dev && p->br && brport_attr->store) {
284 spin_lock_bh(&p->br->lock);
285 ret = brport_attr->store(p, val);
286 spin_unlock_bh(&p->br->lock);
Xin Longbdaf0d52016-04-09 00:03:32 +0800287 if (!ret) {
Nikolay Aleksandrov92899062017-11-01 12:18:13 +0200288 br_ifinfo_notify(RTM_NEWLINK, NULL, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 ret = count;
Xin Longbdaf0d52016-04-09 00:03:32 +0800290 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 }
292 rtnl_unlock();
293 }
294 return ret;
295}
296
Emese Revfy52cf25d2010-01-19 02:58:23 +0100297const struct sysfs_ops brport_sysfs_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 .show = brport_show,
299 .store = brport_store,
300};
301
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302/*
303 * Add sysfs entries to ethernet device added to a bridge.
304 * Creates a brport subdirectory with bridge attributes.
Simon Arlotte0f43752010-05-10 09:31:11 +0000305 * Puts symlink in bridge's brif subdirectory
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 */
307int br_sysfs_addif(struct net_bridge_port *p)
308{
309 struct net_bridge *br = p->br;
stephen hemminger5a0d5132012-07-30 08:55:49 +0000310 const struct brport_attribute **a;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 int err;
312
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700313 err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 SYSFS_BRIDGE_PORT_LINK);
315 if (err)
Simon Arlotte0f43752010-05-10 09:31:11 +0000316 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317
318 for (a = brport_attrs; *a; ++a) {
319 err = sysfs_create_file(&p->kobj, &((*a)->attr));
320 if (err)
Simon Arlotte0f43752010-05-10 09:31:11 +0000321 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 }
323
Simon Arlotte0f43752010-05-10 09:31:11 +0000324 strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
325 return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name);
326}
327
328/* Rename bridge's brif symlink */
329int br_sysfs_renameif(struct net_bridge_port *p)
330{
331 struct net_bridge *br = p->br;
332 int err;
333
334 /* If a rename fails, the rollback will cause another
335 * rename call with the existing name.
336 */
337 if (!strncmp(p->sysfs_name, p->dev->name, IFNAMSIZ))
338 return 0;
339
340 err = sysfs_rename_link(br->ifobj, &p->kobj,
341 p->sysfs_name, p->dev->name);
342 if (err)
343 netdev_notice(br->dev, "unable to rename link %s to %s",
344 p->sysfs_name, p->dev->name);
345 else
346 strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ);
347
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 return err;
349}