2 * Sysfs attributes of bridge ports
3 * Linux ethernet bridge
6 * Stephen Hemminger <shemminger@osdl.org>
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.
14 #include <linux/capability.h>
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 #include <linux/times.h>
22 #include "br_private.h"
24 #define to_dev(obj) container_of(obj, struct device, kobj)
25 #define to_bridge(cd) ((struct net_bridge *)(to_net_dev(cd)->priv))
28 * Common code for storing bridge parameters.
30 static ssize_t
store_bridge_parm(struct device
*d
,
31 const char *buf
, size_t len
,
32 void (*set
)(struct net_bridge
*, unsigned long))
34 struct net_bridge
*br
= to_bridge(d
);
38 if (!capable(CAP_NET_ADMIN
))
41 val
= simple_strtoul(buf
, &endp
, 0);
45 spin_lock_bh(&br
->lock
);
47 spin_unlock_bh(&br
->lock
);
52 static ssize_t
show_forward_delay(struct device
*d
,
53 struct device_attribute
*attr
, char *buf
)
55 struct net_bridge
*br
= to_bridge(d
);
56 return sprintf(buf
, "%lu\n", jiffies_to_clock_t(br
->forward_delay
));
59 static void set_forward_delay(struct net_bridge
*br
, unsigned long val
)
61 unsigned long delay
= clock_t_to_jiffies(val
);
62 br
->forward_delay
= delay
;
63 if (br_is_root_bridge(br
))
64 br
->bridge_forward_delay
= delay
;
67 static ssize_t
store_forward_delay(struct device
*d
,
68 struct device_attribute
*attr
,
69 const char *buf
, size_t len
)
71 return store_bridge_parm(d
, buf
, len
, set_forward_delay
);
73 static DEVICE_ATTR(forward_delay
, S_IRUGO
| S_IWUSR
,
74 show_forward_delay
, store_forward_delay
);
76 static ssize_t
show_hello_time(struct device
*d
, struct device_attribute
*attr
,
79 return sprintf(buf
, "%lu\n",
80 jiffies_to_clock_t(to_bridge(d
)->hello_time
));
83 static void set_hello_time(struct net_bridge
*br
, unsigned long val
)
85 unsigned long t
= clock_t_to_jiffies(val
);
87 if (br_is_root_bridge(br
))
88 br
->bridge_hello_time
= t
;
91 static ssize_t
store_hello_time(struct device
*d
,
92 struct device_attribute
*attr
, const char *buf
,
95 return store_bridge_parm(d
, buf
, len
, set_hello_time
);
97 static DEVICE_ATTR(hello_time
, S_IRUGO
| S_IWUSR
, show_hello_time
,
100 static ssize_t
show_max_age(struct device
*d
, struct device_attribute
*attr
,
103 return sprintf(buf
, "%lu\n",
104 jiffies_to_clock_t(to_bridge(d
)->max_age
));
107 static void set_max_age(struct net_bridge
*br
, unsigned long val
)
109 unsigned long t
= clock_t_to_jiffies(val
);
111 if (br_is_root_bridge(br
))
112 br
->bridge_max_age
= t
;
115 static ssize_t
store_max_age(struct device
*d
, struct device_attribute
*attr
,
116 const char *buf
, size_t len
)
118 return store_bridge_parm(d
, buf
, len
, set_max_age
);
120 static DEVICE_ATTR(max_age
, S_IRUGO
| S_IWUSR
, show_max_age
, store_max_age
);
122 static ssize_t
show_ageing_time(struct device
*d
,
123 struct device_attribute
*attr
, char *buf
)
125 struct net_bridge
*br
= to_bridge(d
);
126 return sprintf(buf
, "%lu\n", jiffies_to_clock_t(br
->ageing_time
));
129 static void set_ageing_time(struct net_bridge
*br
, unsigned long val
)
131 br
->ageing_time
= clock_t_to_jiffies(val
);
134 static ssize_t
store_ageing_time(struct device
*d
,
135 struct device_attribute
*attr
,
136 const char *buf
, size_t len
)
138 return store_bridge_parm(d
, buf
, len
, set_ageing_time
);
140 static DEVICE_ATTR(ageing_time
, S_IRUGO
| S_IWUSR
, show_ageing_time
,
143 static ssize_t
show_stp_state(struct device
*d
,
144 struct device_attribute
*attr
, char *buf
)
146 struct net_bridge
*br
= to_bridge(d
);
147 return sprintf(buf
, "%d\n", br
->stp_enabled
);
151 static ssize_t
store_stp_state(struct device
*d
,
152 struct device_attribute
*attr
, const char *buf
,
155 struct net_bridge
*br
= to_bridge(d
);
159 if (!capable(CAP_NET_ADMIN
))
162 val
= simple_strtoul(buf
, &endp
, 0);
167 br_stp_set_enabled(br
, val
);
172 static DEVICE_ATTR(stp_state
, S_IRUGO
| S_IWUSR
, show_stp_state
,
175 static ssize_t
show_priority(struct device
*d
, struct device_attribute
*attr
,
178 struct net_bridge
*br
= to_bridge(d
);
179 return sprintf(buf
, "%d\n",
180 (br
->bridge_id
.prio
[0] << 8) | br
->bridge_id
.prio
[1]);
183 static void set_priority(struct net_bridge
*br
, unsigned long val
)
185 br_stp_set_bridge_priority(br
, (u16
) val
);
188 static ssize_t
store_priority(struct device
*d
, struct device_attribute
*attr
,
189 const char *buf
, size_t len
)
191 return store_bridge_parm(d
, buf
, len
, set_priority
);
193 static DEVICE_ATTR(priority
, S_IRUGO
| S_IWUSR
, show_priority
, store_priority
);
195 static ssize_t
show_root_id(struct device
*d
, struct device_attribute
*attr
,
198 return br_show_bridge_id(buf
, &to_bridge(d
)->designated_root
);
200 static DEVICE_ATTR(root_id
, S_IRUGO
, show_root_id
, NULL
);
202 static ssize_t
show_bridge_id(struct device
*d
, struct device_attribute
*attr
,
205 return br_show_bridge_id(buf
, &to_bridge(d
)->bridge_id
);
207 static DEVICE_ATTR(bridge_id
, S_IRUGO
, show_bridge_id
, NULL
);
209 static ssize_t
show_root_port(struct device
*d
, struct device_attribute
*attr
,
212 return sprintf(buf
, "%d\n", to_bridge(d
)->root_port
);
214 static DEVICE_ATTR(root_port
, S_IRUGO
, show_root_port
, NULL
);
216 static ssize_t
show_root_path_cost(struct device
*d
,
217 struct device_attribute
*attr
, char *buf
)
219 return sprintf(buf
, "%d\n", to_bridge(d
)->root_path_cost
);
221 static DEVICE_ATTR(root_path_cost
, S_IRUGO
, show_root_path_cost
, NULL
);
223 static ssize_t
show_topology_change(struct device
*d
,
224 struct device_attribute
*attr
, char *buf
)
226 return sprintf(buf
, "%d\n", to_bridge(d
)->topology_change
);
228 static DEVICE_ATTR(topology_change
, S_IRUGO
, show_topology_change
, NULL
);
230 static ssize_t
show_topology_change_detected(struct device
*d
,
231 struct device_attribute
*attr
,
234 struct net_bridge
*br
= to_bridge(d
);
235 return sprintf(buf
, "%d\n", br
->topology_change_detected
);
237 static DEVICE_ATTR(topology_change_detected
, S_IRUGO
,
238 show_topology_change_detected
, NULL
);
240 static ssize_t
show_hello_timer(struct device
*d
,
241 struct device_attribute
*attr
, char *buf
)
243 struct net_bridge
*br
= to_bridge(d
);
244 return sprintf(buf
, "%ld\n", br_timer_value(&br
->hello_timer
));
246 static DEVICE_ATTR(hello_timer
, S_IRUGO
, show_hello_timer
, NULL
);
248 static ssize_t
show_tcn_timer(struct device
*d
, struct device_attribute
*attr
,
251 struct net_bridge
*br
= to_bridge(d
);
252 return sprintf(buf
, "%ld\n", br_timer_value(&br
->tcn_timer
));
254 static DEVICE_ATTR(tcn_timer
, S_IRUGO
, show_tcn_timer
, NULL
);
256 static ssize_t
show_topology_change_timer(struct device
*d
,
257 struct device_attribute
*attr
,
260 struct net_bridge
*br
= to_bridge(d
);
261 return sprintf(buf
, "%ld\n", br_timer_value(&br
->topology_change_timer
));
263 static DEVICE_ATTR(topology_change_timer
, S_IRUGO
, show_topology_change_timer
,
266 static ssize_t
show_gc_timer(struct device
*d
, struct device_attribute
*attr
,
269 struct net_bridge
*br
= to_bridge(d
);
270 return sprintf(buf
, "%ld\n", br_timer_value(&br
->gc_timer
));
272 static DEVICE_ATTR(gc_timer
, S_IRUGO
, show_gc_timer
, NULL
);
274 static ssize_t
show_group_addr(struct device
*d
,
275 struct device_attribute
*attr
, char *buf
)
277 struct net_bridge
*br
= to_bridge(d
);
278 return sprintf(buf
, "%x:%x:%x:%x:%x:%x\n",
279 br
->group_addr
[0], br
->group_addr
[1],
280 br
->group_addr
[2], br
->group_addr
[3],
281 br
->group_addr
[4], br
->group_addr
[5]);
284 static ssize_t
store_group_addr(struct device
*d
,
285 struct device_attribute
*attr
,
286 const char *buf
, size_t len
)
288 struct net_bridge
*br
= to_bridge(d
);
289 unsigned new_addr
[6];
292 if (!capable(CAP_NET_ADMIN
))
295 if (sscanf(buf
, "%x:%x:%x:%x:%x:%x",
296 &new_addr
[0], &new_addr
[1], &new_addr
[2],
297 &new_addr
[3], &new_addr
[4], &new_addr
[5]) != 6)
300 /* Must be 01:80:c2:00:00:0X */
301 for (i
= 0; i
< 5; i
++)
302 if (new_addr
[i
] != br_group_address
[i
])
305 if (new_addr
[5] & ~0xf)
308 if (new_addr
[5] == 1 /* 802.3x Pause address */
309 || new_addr
[5] == 2 /* 802.3ad Slow protocols */
310 || new_addr
[5] == 3) /* 802.1X PAE address */
313 spin_lock_bh(&br
->lock
);
314 for (i
= 0; i
< 6; i
++)
315 br
->group_addr
[i
] = new_addr
[i
];
316 spin_unlock_bh(&br
->lock
);
320 static DEVICE_ATTR(group_addr
, S_IRUGO
| S_IWUSR
,
321 show_group_addr
, store_group_addr
);
323 static ssize_t
store_flush(struct device
*d
,
324 struct device_attribute
*attr
,
325 const char *buf
, size_t len
)
327 struct net_bridge
*br
= to_bridge(d
);
329 if (!capable(CAP_NET_ADMIN
))
335 static DEVICE_ATTR(flush
, S_IWUSR
, NULL
, store_flush
);
337 static struct attribute
*bridge_attrs
[] = {
338 &dev_attr_forward_delay
.attr
,
339 &dev_attr_hello_time
.attr
,
340 &dev_attr_max_age
.attr
,
341 &dev_attr_ageing_time
.attr
,
342 &dev_attr_stp_state
.attr
,
343 &dev_attr_priority
.attr
,
344 &dev_attr_bridge_id
.attr
,
345 &dev_attr_root_id
.attr
,
346 &dev_attr_root_path_cost
.attr
,
347 &dev_attr_root_port
.attr
,
348 &dev_attr_topology_change
.attr
,
349 &dev_attr_topology_change_detected
.attr
,
350 &dev_attr_hello_timer
.attr
,
351 &dev_attr_tcn_timer
.attr
,
352 &dev_attr_topology_change_timer
.attr
,
353 &dev_attr_gc_timer
.attr
,
354 &dev_attr_group_addr
.attr
,
355 &dev_attr_flush
.attr
,
359 static struct attribute_group bridge_group
= {
360 .name
= SYSFS_BRIDGE_ATTR
,
361 .attrs
= bridge_attrs
,
365 * Export the forwarding information table as a binary file
366 * The records are struct __fdb_entry.
368 * Returns the number of bytes read.
370 static ssize_t
brforward_read(struct kobject
*kobj
,
371 struct bin_attribute
*bin_attr
,
372 char *buf
, loff_t off
, size_t count
)
374 struct device
*dev
= to_dev(kobj
);
375 struct net_bridge
*br
= to_bridge(dev
);
378 /* must read whole records */
379 if (off
% sizeof(struct __fdb_entry
) != 0)
382 n
= br_fdb_fillbuf(br
, buf
,
383 count
/ sizeof(struct __fdb_entry
),
384 off
/ sizeof(struct __fdb_entry
));
387 n
*= sizeof(struct __fdb_entry
);
392 static struct bin_attribute bridge_forward
= {
393 .attr
= { .name
= SYSFS_BRIDGE_FDB
,
395 .read
= brforward_read
,
399 * Add entries in sysfs onto the existing network class device
401 * Adds a attribute group "bridge" containing tuning parameters.
402 * Binary attribute containing the forward table
403 * Sub directory to hold links to interfaces.
405 * Note: the ifobj exists only to be a subdirectory
406 * to hold links. The ifobj exists in same data structure
407 * as it's parent the bridge so reference counting works.
409 int br_sysfs_addbr(struct net_device
*dev
)
411 struct kobject
*brobj
= &dev
->dev
.kobj
;
412 struct net_bridge
*br
= netdev_priv(dev
);
415 err
= sysfs_create_group(brobj
, &bridge_group
);
417 pr_info("%s: can't create group %s/%s\n",
418 __FUNCTION__
, dev
->name
, bridge_group
.name
);
422 err
= sysfs_create_bin_file(brobj
, &bridge_forward
);
424 pr_info("%s: can't create attribute file %s/%s\n",
425 __FUNCTION__
, dev
->name
, bridge_forward
.attr
.name
);
429 br
->ifobj
= kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR
, brobj
);
431 pr_info("%s: can't add kobject (directory) %s/%s\n",
432 __FUNCTION__
, dev
->name
, SYSFS_BRIDGE_PORT_SUBDIR
);
437 sysfs_remove_bin_file(&dev
->dev
.kobj
, &bridge_forward
);
439 sysfs_remove_group(&dev
->dev
.kobj
, &bridge_group
);
445 void br_sysfs_delbr(struct net_device
*dev
)
447 struct kobject
*kobj
= &dev
->dev
.kobj
;
448 struct net_bridge
*br
= netdev_priv(dev
);
450 kobject_unregister(br
->ifobj
);
451 sysfs_remove_bin_file(kobj
, &bridge_forward
);
452 sysfs_remove_group(kobj
, &bridge_group
);