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![Stephen Hemminger](/assets/img/avatar_default.png)
Refactor how the bridge code interacts with kobject system. It should still use kobjects even if not using sysfs. Fix the error unwind handling in br_add_if. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
228 lines
6.2 KiB
C
228 lines
6.2 KiB
C
/*
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* Sysfs attributes of bridge ports
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* Linux ethernet bridge
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*
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* Authors:
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* Stephen Hemminger <shemminger@osdl.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/capability.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/if_bridge.h>
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#include <linux/rtnetlink.h>
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#include <linux/spinlock.h>
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#include "br_private.h"
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struct brport_attribute {
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struct attribute attr;
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ssize_t (*show)(struct net_bridge_port *, char *);
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ssize_t (*store)(struct net_bridge_port *, unsigned long);
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};
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#define BRPORT_ATTR(_name,_mode,_show,_store) \
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struct brport_attribute brport_attr_##_name = { \
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.attr = {.name = __stringify(_name), \
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.mode = _mode, \
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.owner = THIS_MODULE, }, \
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.show = _show, \
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.store = _store, \
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};
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static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->path_cost);
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}
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static ssize_t store_path_cost(struct net_bridge_port *p, unsigned long v)
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{
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br_stp_set_path_cost(p, v);
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return 0;
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}
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static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR,
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show_path_cost, store_path_cost);
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static ssize_t show_priority(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->priority);
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}
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static ssize_t store_priority(struct net_bridge_port *p, unsigned long v)
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{
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if (v >= (1<<(16-BR_PORT_BITS)))
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return -ERANGE;
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br_stp_set_port_priority(p, v);
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return 0;
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}
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static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR,
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show_priority, store_priority);
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static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
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{
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return br_show_bridge_id(buf, &p->designated_root);
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}
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static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL);
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static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
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{
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return br_show_bridge_id(buf, &p->designated_bridge);
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}
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static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL);
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static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->designated_port);
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}
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static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL);
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static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->designated_cost);
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}
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static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL);
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static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "0x%x\n", p->port_id);
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}
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static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL);
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static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "0x%x\n", p->port_no);
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}
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static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL);
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static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->topology_change_ack);
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}
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static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL);
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static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->config_pending);
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}
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static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL);
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static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
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{
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return sprintf(buf, "%d\n", p->state);
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}
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static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL);
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static ssize_t show_message_age_timer(struct net_bridge_port *p,
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char *buf)
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{
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return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer));
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}
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static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL);
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static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
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char *buf)
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{
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return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer));
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}
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static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL);
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static ssize_t show_hold_timer(struct net_bridge_port *p,
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char *buf)
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{
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return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer));
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}
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static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL);
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static struct brport_attribute *brport_attrs[] = {
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&brport_attr_path_cost,
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&brport_attr_priority,
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&brport_attr_port_id,
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&brport_attr_port_no,
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&brport_attr_designated_root,
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&brport_attr_designated_bridge,
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&brport_attr_designated_port,
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&brport_attr_designated_cost,
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&brport_attr_state,
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&brport_attr_change_ack,
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&brport_attr_config_pending,
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&brport_attr_message_age_timer,
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&brport_attr_forward_delay_timer,
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&brport_attr_hold_timer,
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NULL
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};
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#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr)
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#define to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
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static ssize_t brport_show(struct kobject * kobj,
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struct attribute * attr, char * buf)
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{
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struct brport_attribute * brport_attr = to_brport_attr(attr);
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struct net_bridge_port * p = to_brport(kobj);
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return brport_attr->show(p, buf);
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}
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static ssize_t brport_store(struct kobject * kobj,
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struct attribute * attr,
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const char * buf, size_t count)
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{
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struct brport_attribute * brport_attr = to_brport_attr(attr);
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struct net_bridge_port * p = to_brport(kobj);
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ssize_t ret = -EINVAL;
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char *endp;
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unsigned long val;
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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val = simple_strtoul(buf, &endp, 0);
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if (endp != buf) {
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rtnl_lock();
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if (p->dev && p->br && brport_attr->store) {
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spin_lock_bh(&p->br->lock);
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ret = brport_attr->store(p, val);
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spin_unlock_bh(&p->br->lock);
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if (ret == 0)
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ret = count;
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}
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rtnl_unlock();
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}
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return ret;
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}
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struct sysfs_ops brport_sysfs_ops = {
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.show = brport_show,
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.store = brport_store,
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};
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/*
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* Add sysfs entries to ethernet device added to a bridge.
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* Creates a brport subdirectory with bridge attributes.
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* Puts symlink in bridge's brport subdirectory
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*/
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int br_sysfs_addif(struct net_bridge_port *p)
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{
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struct net_bridge *br = p->br;
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struct brport_attribute **a;
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int err;
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err = sysfs_create_link(&p->kobj, &br->dev->class_dev.kobj,
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SYSFS_BRIDGE_PORT_LINK);
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if (err)
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goto out2;
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for (a = brport_attrs; *a; ++a) {
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err = sysfs_create_file(&p->kobj, &((*a)->attr));
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if (err)
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goto out2;
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}
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err= sysfs_create_link(&br->ifobj, &p->kobj, p->dev->name);
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out2:
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return err;
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}
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