Stephen Hemminger
2007-Apr-18 12:34 UTC
[Bridge] [PATCH] (8/11) bridge -- add sysfs support
# This is a BitKeeper generated diff -Nru style patch.
Add sysfs attributes for bridges. This allows for easier management, and solves
some of the 64/32bit compatibility issues.
New entries are:
sys/class/net
|-- br0
| |-- brforward
| |-- bridge
| | |-- ageing_time
| | |-- bridge_id
| | |-- forward_delay
| | |-- gc_timer
| | |-- hello_time
| | |-- hello_timer
| | |-- max_age
| | |-- priority
| | |-- root_id
| | |-- root_path_cost
| | |-- root_port
| | |-- stp_state
| | |-- tcn_timer
| | |-- topology_change
| | |-- topology_change_detected
| | `-- topology_change_timer
| |-- brif
| | |-- dummy0 -> ../../../../class/net/dummy0/brport
| | `-- dummy1 -> ../../../../class/net/dummy1/brport
...
|-- dummy0
| |-- brport
| | |-- bridge -> ../../../../class/net/br0
| | |-- change_ack
| | |-- config_pending
| | |-- designated_bridge
| | |-- designated_cost
| | |-- designated_port
| | |-- designated_root
| | |-- forward_delay_timer
| | |-- hold_timer
| | |-- message_age_timer
| | |-- path_cost
| | |-- port_id
| | |-- port_no
| | |-- priority
| | `-- state
diff -Nru a/include/linux/if_bridge.h b/include/linux/if_bridge.h
--- a/include/linux/if_bridge.h 2004-05-21 16:27:21 -07:00
+++ b/include/linux/if_bridge.h 2004-05-21 16:27:21 -07:00
@@ -17,6 +17,12 @@
#include <linux/types.h>
+#define SYSFS_BRIDGE_ATTR "bridge"
+#define SYSFS_BRIDGE_FDB "brforward"
+#define SYSFS_BRIDGE_PORT_SUBDIR "brif"
+#define SYSFS_BRIDGE_PORT_ATTR "brport"
+#define SYSFS_BRIDGE_PORT_LINK "bridge"
+
#define BRCTL_VERSION 1
#define BRCTL_GET_VERSION 0
diff -Nru a/net/bridge/Makefile b/net/bridge/Makefile
--- a/net/bridge/Makefile 2004-05-21 16:27:21 -07:00
+++ b/net/bridge/Makefile 2004-05-21 16:27:21 -07:00
@@ -8,6 +8,8 @@
br_ioctl.o br_notify.o br_stp.o br_stp_bpdu.o \
br_stp_if.o br_stp_timer.o
+bridge-$(CONFIG_SYSFS) += br_sysfs_if.o br_sysfs_br.o
+
bridge-$(CONFIG_BRIDGE_NETFILTER) += br_netfilter.o
obj-$(CONFIG_BRIDGE_NF_EBTABLES) += netfilter/
diff -Nru a/net/bridge/br.c b/net/bridge/br.c
--- a/net/bridge/br.c 2004-05-21 16:27:21 -07:00
+++ b/net/bridge/br.c 2004-05-21 16:27:21 -07:00
@@ -33,6 +33,8 @@
{
br_fdb_init();
+ br_sysfs_init();
+
#ifdef CONFIG_BRIDGE_NETFILTER
if (br_netfilter_init())
return 1;
@@ -67,6 +69,7 @@
#endif
br_handle_frame_hook = NULL;
+ br_sysfs_fini();
br_fdb_fini();
}
diff -Nru a/net/bridge/br_if.c b/net/bridge/br_if.c
--- a/net/bridge/br_if.c 2004-05-21 16:27:21 -07:00
+++ b/net/bridge/br_if.c 2004-05-21 16:27:21 -07:00
@@ -81,8 +81,11 @@
struct net_device *dev = p->dev;
dev->br_port = NULL;
+ p->br = NULL;
+ p->dev = NULL;
dev_put(dev);
- kfree(p);
+
+ br_sysfs_freeif(p);
}
/* called with RTNL */
@@ -111,14 +114,16 @@
/* called with RTNL */
static void del_br(struct net_bridge *br)
{
- struct list_head *p, *n;
+ struct net_bridge_port *p, *n;
- list_for_each_safe(p, n, &br->port_list) {
- del_nbp(list_entry(p, struct net_bridge_port, list));
+ list_for_each_entry_safe(p, n, &br->port_list, list) {
+ br_sysfs_removeif(p);
+ del_nbp(p);
}
del_timer_sync(&br->gc_timer);
+ br_sysfs_delbr(br->dev);
unregister_netdevice(br->dev);
}
@@ -210,6 +215,7 @@
p->port_no = index;
br_init_port(p);
p->state = BR_STATE_DISABLED;
+ kobject_init(&p->kobj);
return p;
}
@@ -223,10 +229,37 @@
if (!dev)
return -ENOMEM;
- ret = register_netdev(dev);
+ rtnl_lock();
+ if (strchr(dev->name, '%')) {
+ ret = dev_alloc_name(dev, dev->name);
+ if (ret < 0)
+ goto err1;
+ }
+
+ ret = register_netdevice(dev);
if (ret)
- free_netdev(dev);
+ goto err2;
+
+ /* network device kobject is not setup until
+ * after rtnl_unlock does it's hotplug magic.
+ * so hold reference to avoid race.
+ */
+ dev_hold(dev);
+ rtnl_unlock();
+
+ ret = br_sysfs_addbr(dev);
+ dev_put(dev);
+
+ if (ret)
+ unregister_netdev(dev);
+ out:
return ret;
+
+ err2:
+ free_netdev(dev);
+ err1:
+ rtnl_unlock();
+ goto out;
}
int br_del_bridge(const char *name)
@@ -277,6 +310,8 @@
if ((err = br_fdb_insert(br, p, dev->dev_addr, 1)))
destroy_nbp(p);
+ else if ((err = br_sysfs_addif(p)))
+ del_nbp(p);
else {
dev_set_promiscuity(dev, 1);
@@ -300,6 +335,7 @@
if (!p || p->br != br)
return -EINVAL;
+ br_sysfs_removeif(p);
del_nbp(p);
spin_lock_bh(&br->lock);
diff -Nru a/net/bridge/br_private.h b/net/bridge/br_private.h
--- a/net/bridge/br_private.h 2004-05-21 16:27:21 -07:00
+++ b/net/bridge/br_private.h 2004-05-21 16:27:21 -07:00
@@ -76,6 +76,7 @@
struct timer_list forward_delay_timer;
struct timer_list hold_timer;
struct timer_list message_age_timer;
+ struct kobject kobj;
struct rcu_head rcu;
};
@@ -110,6 +111,7 @@
struct timer_list tcn_timer;
struct timer_list topology_change_timer;
struct timer_list gc_timer;
+ struct kobject ifobj;
};
extern struct notifier_block br_device_notifier;
@@ -198,6 +200,7 @@
u8 newprio);
extern void br_stp_set_path_cost(struct net_bridge_port *p,
u32 path_cost);
+extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
/* br_stp_bpdu.c */
extern int br_stp_handle_bpdu(struct sk_buff *skb);
@@ -206,5 +209,29 @@
extern void br_stp_timer_init(struct net_bridge *br);
extern void br_stp_port_timer_init(struct net_bridge_port *p);
extern unsigned long br_timer_value(const struct timer_list *timer);
+
+#ifdef CONFIG_SYSFS
+/* br_sysfs_if.c */
+extern int br_sysfs_addif(struct net_bridge_port *p);
+extern void br_sysfs_removeif(struct net_bridge_port *p);
+extern void br_sysfs_freeif(struct net_bridge_port *p);
+
+/* br_sysfs_br.c */
+extern struct subsystem bridge_subsys;
+extern void br_sysfs_init(void);
+extern void br_sysfs_fini(void);
+extern int br_sysfs_addbr(struct net_device *dev);
+extern void br_sysfs_delbr(struct net_device *dev);
+
+#else
+
+#define br_sysfs_addif(p) (0)
+#define br_sysfs_removeif(p) do { } while(0)
+#define br_sysfs_freeif(p) kfree(p)
+#define br_sysfs_init() do { } while(0)
+#define br_sysfs_fini() do { } while(0)
+#define br_sysfs_addbr(dev) (0)
+#define br_sysfs_delbr(dev) do { } while(0)
+#endif /* CONFIG_SYSFS */
#endif
diff -Nru a/net/bridge/br_stp_if.c b/net/bridge/br_stp_if.c
--- a/net/bridge/br_stp_if.c 2004-05-21 16:27:21 -07:00
+++ b/net/bridge/br_stp_if.c 2004-05-21 16:27:21 -07:00
@@ -212,3 +212,11 @@
br_configuration_update(p->br);
br_port_state_selection(p->br);
}
+
+ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id)
+{
+ return sprintf(buf, "%.2x%.2x.%.2x%.2x%.2x%.2x%.2x%.2x\n",
+ id->prio[0], id->prio[1],
+ id->addr[0], id->addr[1], id->addr[2],
+ id->addr[3], id->addr[4], id->addr[5]);
+}
diff -Nru a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/net/bridge/br_sysfs_br.c 2004-05-21 16:27:21 -07:00
@@ -0,0 +1,383 @@
+/*
+ * 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/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/if_bridge.h>
+#include <linux/rtnetlink.h>
+#include <linux/spinlock.h>
+#include <linux/times.h>
+
+#include "br_private.h"
+
+#define to_class_dev(obj) container_of(obj,struct class_device,kobj)
+#define to_net_dev(class) container_of(class, struct net_device, class_dev)
+#define to_bridge(cd) ((struct net_bridge *)(to_net_dev(cd)->priv))
+
+/*
+ * Common code for storing bridge parameters.
+ */
+static ssize_t store_bridge_parm(struct class_device *cd,
+ const char *buf, size_t len,
+ void (*set)(struct net_bridge *, unsigned long))
+{
+ struct net_bridge *br = to_bridge(cd);
+ char *endp;
+ unsigned long val;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ val = simple_strtoul(buf, &endp, 0);
+ if (endp == buf)
+ return -EINVAL;
+
+ spin_lock_bh(&br->lock);
+ (*set)(br, val);
+ spin_unlock_bh(&br->lock);
+ return len;
+}
+
+
+static ssize_t show_forward_delay(struct class_device *cd, char *buf)
+{
+ struct net_bridge *br = to_bridge(cd);
+ return sprintf(buf, "%lu\n",
jiffies_to_clock_t(br->forward_delay));
+}
+
+static void set_forward_delay(struct net_bridge *br, unsigned long val)
+{
+ unsigned long delay = clock_t_to_jiffies(val);
+ br->forward_delay = delay;
+ if (br_is_root_bridge(br))
+ br->bridge_forward_delay = delay;
+}
+
+static ssize_t store_forward_delay(struct class_device *cd, const char *buf,
+ size_t len)
+{
+ return store_bridge_parm(cd, buf, len, set_forward_delay);
+}
+static CLASS_DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
+ show_forward_delay, store_forward_delay);
+
+static ssize_t show_hello_time(struct class_device *cd, char *buf)
+{
+ return sprintf(buf, "%lu\n",
+ jiffies_to_clock_t(to_bridge(cd)->hello_time));
+}
+
+static void set_hello_time(struct net_bridge *br, unsigned long val)
+{
+ unsigned long t = clock_t_to_jiffies(val);
+ br->hello_time = t;
+ if (br_is_root_bridge(br))
+ br->bridge_hello_time = t;
+}
+
+static ssize_t store_hello_time(struct class_device *cd, const char *buf,
+ size_t len)
+{
+ return store_bridge_parm(cd, buf, len, set_hello_time);
+}
+
+static CLASS_DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
+ store_hello_time);
+
+static ssize_t show_max_age(struct class_device *cd, char *buf)
+{
+ return sprintf(buf, "%lu\n",
+ jiffies_to_clock_t(to_bridge(cd)->max_age));
+}
+
+static void set_max_age(struct net_bridge *br, unsigned long val)
+{
+ unsigned long t = clock_t_to_jiffies(val);
+ br->max_age = t;
+ if (br_is_root_bridge(br))
+ br->bridge_max_age = t;
+}
+
+static ssize_t store_max_age(struct class_device *cd, const char *buf,
+ size_t len)
+{
+ return store_bridge_parm(cd, buf, len, set_max_age);
+}
+
+static CLASS_DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age,
+ store_max_age);
+
+static ssize_t show_ageing_time(struct class_device *cd, char *buf)
+{
+ struct net_bridge *br = to_bridge(cd);
+ return sprintf(buf, "%lu\n",
jiffies_to_clock_t(br->ageing_time));
+}
+
+static void set_ageing_time(struct net_bridge *br, unsigned long val)
+{
+ br->ageing_time = clock_t_to_jiffies(val);
+}
+
+static ssize_t store_ageing_time(struct class_device *cd, const char *buf,
+ size_t len)
+{
+ return store_bridge_parm(cd, buf, len, set_ageing_time);
+}
+
+static CLASS_DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
+ store_ageing_time);
+static ssize_t show_stp_state(struct class_device *cd, char *buf)
+{
+ struct net_bridge *br = to_bridge(cd);
+ return sprintf(buf, "%d\n", br->stp_enabled);
+}
+
+static void set_stp_state(struct net_bridge *br, unsigned long val)
+{
+ br->stp_enabled = val;
+}
+
+static ssize_t store_stp_state(struct class_device *cd,
+ const char *buf, size_t len)
+{
+ return store_bridge_parm(cd, buf, len, set_stp_state);
+}
+
+static CLASS_DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
+ store_stp_state);
+
+static ssize_t show_priority(struct class_device *cd, char *buf)
+{
+ struct net_bridge *br = to_bridge(cd);
+ return sprintf(buf, "%d\n",
+ (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
+}
+
+static void set_priority(struct net_bridge *br, unsigned long val)
+{
+ br_stp_set_bridge_priority(br, (u16) val);
+}
+
+static ssize_t store_priority(struct class_device *cd,
+ const char *buf, size_t len)
+{
+ return store_bridge_parm(cd, buf, len, set_priority);
+}
+static CLASS_DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority,
+ store_priority);
+
+static ssize_t show_root_id(struct class_device *cd, char *buf)
+{
+ return br_show_bridge_id(buf, &to_bridge(cd)->designated_root);
+}
+static CLASS_DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
+
+static ssize_t show_bridge_id(struct class_device *cd, char *buf)
+{
+ return br_show_bridge_id(buf, &to_bridge(cd)->bridge_id);
+}
+static CLASS_DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
+
+static ssize_t show_root_port(struct class_device *cd, char *buf)
+{
+ return sprintf(buf, "%d\n", to_bridge(cd)->root_port);
+}
+static CLASS_DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
+
+static ssize_t show_root_path_cost(struct class_device *cd, char *buf)
+{
+ return sprintf(buf, "%d\n", to_bridge(cd)->root_path_cost);
+}
+static CLASS_DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
+
+static ssize_t show_topology_change(struct class_device *cd, char *buf)
+{
+ return sprintf(buf, "%d\n", to_bridge(cd)->topology_change);
+}
+static CLASS_DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
+
+static ssize_t show_topology_change_detected(struct class_device *cd, char
*buf)
+{
+ struct net_bridge *br = to_bridge(cd);
+ return sprintf(buf, "%d\n", br->topology_change_detected);
+}
+static CLASS_DEVICE_ATTR(topology_change_detected, S_IRUGO,
show_topology_change_detected, NULL);
+
+static ssize_t show_hello_timer(struct class_device *cd, char *buf)
+{
+ struct net_bridge *br = to_bridge(cd);
+ return sprintf(buf, "%ld\n",
br_timer_value(&br->hello_timer));
+}
+static CLASS_DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
+
+static ssize_t show_tcn_timer(struct class_device *cd, char *buf)
+{
+ struct net_bridge *br = to_bridge(cd);
+ return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
+}
+static CLASS_DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
+
+static ssize_t show_topology_change_timer(struct class_device *cd, char *buf)
+{
+ struct net_bridge *br = to_bridge(cd);
+ return sprintf(buf, "%ld\n",
br_timer_value(&br->topology_change_timer));
+}
+static CLASS_DEVICE_ATTR(topology_change_timer, S_IRUGO,
show_topology_change_timer, NULL);
+
+static ssize_t show_gc_timer(struct class_device *cd, char *buf)
+{
+ struct net_bridge *br = to_bridge(cd);
+ return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
+}
+static CLASS_DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
+
+static struct attribute *bridge_attrs[] = {
+ &class_device_attr_forward_delay.attr,
+ &class_device_attr_hello_time.attr,
+ &class_device_attr_max_age.attr,
+ &class_device_attr_ageing_time.attr,
+ &class_device_attr_stp_state.attr,
+ &class_device_attr_priority.attr,
+ &class_device_attr_bridge_id.attr,
+ &class_device_attr_root_id.attr,
+ &class_device_attr_root_path_cost.attr,
+ &class_device_attr_root_port.attr,
+ &class_device_attr_topology_change.attr,
+ &class_device_attr_topology_change_detected.attr,
+ &class_device_attr_hello_timer.attr,
+ &class_device_attr_tcn_timer.attr,
+ &class_device_attr_topology_change_timer.attr,
+ &class_device_attr_gc_timer.attr,
+ NULL
+};
+
+static struct attribute_group bridge_group = {
+ .name = SYSFS_BRIDGE_ATTR,
+ .attrs = bridge_attrs,
+};
+
+/*
+ * Export the forwarding information table as a binary file
+ * The records are struct __fdb_entry.
+ *
+ * Returns the number of bytes read.
+ */
+static ssize_t brforward_read(struct kobject *kobj, char *buf,
+ loff_t off, size_t count)
+{
+ struct class_device *cdev = to_class_dev(kobj);
+ struct net_bridge *br = to_bridge(cdev);
+ int n;
+
+ /* must read whole records */
+ if (off % sizeof(struct __fdb_entry) != 0)
+ return -EINVAL;
+
+ n = br_fdb_fillbuf(br, buf,
+ count / sizeof(struct __fdb_entry),
+ off / sizeof(struct __fdb_entry));
+
+ if (n > 0)
+ n *= sizeof(struct __fdb_entry);
+
+ return n;
+}
+
+static struct bin_attribute bridge_forward = {
+ .attr = { .name = SYSFS_BRIDGE_FDB,
+ .mode = S_IRUGO,
+ .owner = THIS_MODULE, },
+ .read = brforward_read,
+};
+
+
+/*
+ * This is a dummy kset so bridge objects don't cause
+ * hotplug events
+ */
+struct subsystem bridge_subsys = {
+ .kset = { .hotplug_ops = NULL },
+};
+
+void br_sysfs_init(void)
+{
+ subsystem_register(&bridge_subsys);
+}
+
+void br_sysfs_fini(void)
+{
+ subsystem_unregister(&bridge_subsys);
+}
+
+/*
+ * Add entries in sysfs onto the existing network class device
+ * for the bridge.
+ * Adds a attribute group "bridge" containing tuning parameters.
+ * Binary attribute containing the forward table
+ * Sub directory to hold links to interfaces.
+ *
+ * Note: the ifobj exists only to be a subdirectory
+ * to hold links. The ifobj exists in same data structure
+ * as it's parent the bridge so reference counting works.
+ */
+int br_sysfs_addbr(struct net_device *dev)
+{
+ struct kobject *brobj = &dev->class_dev.kobj;
+ struct net_bridge *br = netdev_priv(dev);
+ int err;
+
+ err = sysfs_create_group(brobj, &bridge_group);
+ if (err) {
+ pr_info("%s: can't create group %s/%s\n",
+ __FUNCTION__, dev->name, bridge_group.name);
+ goto out1;
+ }
+
+ err = sysfs_create_bin_file(brobj, &bridge_forward);
+ if (err) {
+ pr_info("%s: can't create attribue file %s/%s\n",
+ __FUNCTION__, dev->name, bridge_forward.attr.name);
+ goto out2;
+ }
+
+
+ kobject_set_name(&br->ifobj, SYSFS_BRIDGE_PORT_SUBDIR);
+ br->ifobj.ktype = NULL;
+ br->ifobj.kset = &bridge_subsys.kset;
+ br->ifobj.parent = brobj;
+
+ err = kobject_register(&br->ifobj);
+ if (err) {
+ pr_info("%s: can't add kobject (directory) %s/%s\n",
+ __FUNCTION__, dev->name, br->ifobj.name);
+ goto out3;
+ }
+ return 0;
+ out3:
+ sysfs_remove_bin_file(&dev->class_dev.kobj, &bridge_forward);
+ out2:
+ sysfs_remove_group(&dev->class_dev.kobj, &bridge_group);
+ out1:
+ return err;
+
+}
+
+void br_sysfs_delbr(struct net_device *dev)
+{
+ struct kobject *kobj = &dev->class_dev.kobj;
+ struct net_bridge *br = netdev_priv(dev);
+
+ kobject_unregister(&br->ifobj);
+ sysfs_remove_bin_file(kobj, &bridge_forward);
+ sysfs_remove_group(kobj, &bridge_group);
+}
diff -Nru a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
--- /dev/null Wed Dec 31 16:00:00 196900
+++ b/net/bridge/br_sysfs_if.c 2004-05-21 16:27:21 -07:00
@@ -0,0 +1,269 @@
+/*
+ * 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/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 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,
+ 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;
+}
+
+/* called from kobject_put when port ref count goes to zero. */
+static void brport_release(struct kobject *kobj)
+{
+ kfree(container_of(kobj, struct net_bridge_port, kobj));
+}
+
+static struct sysfs_ops brport_sysfs_ops = {
+ .show = brport_show,
+ .store = brport_store,
+};
+
+static struct kobj_type brport_ktype = {
+ .sysfs_ops = &brport_sysfs_ops,
+ .release = brport_release,
+};
+
+
+/*
+ * 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;
+
+ ASSERT_RTNL();
+
+ kobject_set_name(&p->kobj, SYSFS_BRIDGE_PORT_ATTR);
+ p->kobj.ktype = &brport_ktype;
+ p->kobj.parent = &(p->dev->class_dev.kobj);
+ p->kobj.kset = &bridge_subsys.kset;
+
+ err = kobject_add(&p->kobj);
+ if(err)
+ goto out1;
+
+ err = sysfs_create_link(&p->kobj, &br->dev->class_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);
+ if (err)
+ goto out2;
+
+ return 0;
+ out2:
+ kobject_del(&p->kobj);
+ out1:
+ return err;
+}
+
+void br_sysfs_removeif(struct net_bridge_port *p)
+{
+ pr_debug("br_sysfs_removeif\n");
+ sysfs_remove_link(&p->br->ifobj, p->dev->name);
+ kobject_del(&p->kobj);
+}
+
+void br_sysfs_freeif(struct net_bridge_port *p)
+{
+ pr_debug("br_sysfs_freeif\n");
+ kobject_put(&p->kobj);
+}