summaryrefslogtreecommitdiff
path: root/net/bridge/br_sysfs_if.c
blob: 2da22927d8dd158ea341fe53d896dc1f53ea52b6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
/*
 *	Sysfs attributes of bridge ports
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Stephen Hemminger		<shemminger@osdl.org>
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License
 *	as published by the Free Software Foundation; either version
 *	2 of the License, or (at your option) any later version.
 */

#include <linux/capability.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/if_bridge.h>
#include <linux/rtnetlink.h>
#include <linux/spinlock.h>

#include "br_private.h"

struct brport_attribute {
	struct attribute	attr;
	ssize_t (*show)(struct net_bridge_port *, char *);
	ssize_t (*store)(struct net_bridge_port *, unsigned long);
};

#define BRPORT_ATTR(_name,_mode,_show,_store)		        \
struct brport_attribute brport_attr_##_name = { 	        \
	.attr = {.name = __stringify(_name), 			\
		 .mode = _mode, 				\
		 .owner = THIS_MODULE, },			\
	.show	= _show,					\
	.store	= _store,					\
};

static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->path_cost);
}
static ssize_t store_path_cost(struct net_bridge_port *p, unsigned long v)
{
	br_stp_set_path_cost(p, v);
	return 0;
}
static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR,
		   show_path_cost, store_path_cost);

static ssize_t show_priority(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->priority);
}
static ssize_t store_priority(struct net_bridge_port *p, unsigned long v)
{
	if (v >= (1<<(16-BR_PORT_BITS)))
		return -ERANGE;
	br_stp_set_port_priority(p, v);
	return 0;
}
static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR,
			 show_priority, store_priority);

static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
{
	return br_show_bridge_id(buf, &p->designated_root);
}
static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL);

static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
{
	return br_show_bridge_id(buf, &p->designated_bridge);
}
static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL);

static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->designated_port);
}
static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL);

static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->designated_cost);
}
static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL);

static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "0x%x\n", p->port_id);
}
static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL);

static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "0x%x\n", p->port_no);
}

static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL);

static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->topology_change_ack);
}
static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL);

static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->config_pending);
}
static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL);

static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
{
	return sprintf(buf, "%d\n", p->state);
}
static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL);

static ssize_t show_message_age_timer(struct net_bridge_port *p,
					    char *buf)
{
	return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer));
}
static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL);

static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
					    char *buf)
{
	return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer));
}
static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL);

static ssize_t show_hold_timer(struct net_bridge_port *p,
					    char *buf)
{
	return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer));
}
static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL);

static ssize_t store_flush(struct net_bridge_port *p, unsigned long v)
{
	br_fdb_delete_by_port(p->br, p, 0); // Don't delete local entry
	return 0;
}
static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush);

static struct brport_attribute *brport_attrs[] = {
	&brport_attr_path_cost,
	&brport_attr_priority,
	&brport_attr_port_id,
	&brport_attr_port_no,
	&brport_attr_designated_root,
	&brport_attr_designated_bridge,
	&brport_attr_designated_port,
	&brport_attr_designated_cost,
	&brport_attr_state,
	&brport_attr_change_ack,
	&brport_attr_config_pending,
	&brport_attr_message_age_timer,
	&brport_attr_forward_delay_timer,
	&brport_attr_hold_timer,
	&brport_attr_flush,
	NULL
};

#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
#define to_brport(obj)	container_of(obj, struct net_bridge_port, kobj)

static ssize_t brport_show(struct kobject * kobj,
			   struct attribute * attr, char * buf)
{
	struct brport_attribute * brport_attr = to_brport_attr(attr);
	struct net_bridge_port * p = to_brport(kobj);

	return brport_attr->show(p, buf);
}

static ssize_t brport_store(struct kobject * kobj,
			    struct attribute * attr,
			    const char * buf, size_t count)
{
	struct brport_attribute * brport_attr = to_brport_attr(attr);
	struct net_bridge_port * p = to_brport(kobj);
	ssize_t ret = -EINVAL;
	char *endp;
	unsigned long val;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	val = simple_strtoul(buf, &endp, 0);
	if (endp != buf) {
		rtnl_lock();
		if (p->dev && p->br && brport_attr->store) {
			spin_lock_bh(&p->br->lock);
			ret = brport_attr->store(p, val);
			spin_unlock_bh(&p->br->lock);
			if (ret == 0)
				ret = count;
		}
		rtnl_unlock();
	}
	return ret;
}

struct sysfs_ops brport_sysfs_ops = {
	.show = brport_show,
	.store = brport_store,
};

/*
 * Add sysfs entries to ethernet device added to a bridge.
 * Creates a brport subdirectory with bridge attributes.
 * Puts symlink in bridge's brport subdirectory
 */
int br_sysfs_addif(struct net_bridge_port *p)
{
	struct net_bridge *br = p->br;
	struct brport_attribute **a;
	int err;

	err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj,
				SYSFS_BRIDGE_PORT_LINK);
	if (err)
		goto out2;

	for (a = brport_attrs; *a; ++a) {
		err = sysfs_create_file(&p->kobj, &((*a)->attr));
		if (err)
			goto out2;
	}

	err= sysfs_create_link(&br->ifobj, &p->kobj, p->dev->name);
out2:
	return err;
}