--- /dev/null
+/*
+ * 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);
+}
git://git.onelab.eu / linux-2.6.git / blobdiff