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-rw-r--r--net/bridge/br_sysfs_if.c269
1 files changed, 269 insertions, 0 deletions
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
new file mode 100644
index 0000000..567249b
--- /dev/null
+++ b/net/bridge/br_sysfs_if.c
@@ -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 = NULL;
+
+ 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);
+}
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