/*
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/*
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* Userspace interface
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* Userspace interface
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* Linux ethernet bridge
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* Linux ethernet bridge
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*
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*
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* Authors:
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* Authors:
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* Lennert Buytenhek <buytenh@gnu.org>
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* Lennert Buytenhek <buytenh@gnu.org>
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*
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*
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* $Id: br_if.c,v 1.1.1.1 2004-04-15 01:16:27 phoenix Exp $
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* $Id: br_if.c,v 1.1.1.1 2004-04-15 01:16:27 phoenix Exp $
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*
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*
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* This program is free software; you can redistribute it and/or
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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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* 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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* 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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* 2 of the License, or (at your option) any later version.
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*/
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*/
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/if_arp.h>
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#include <linux/if_arp.h>
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#include <linux/if_bridge.h>
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#include <linux/if_bridge.h>
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#include <linux/inetdevice.h>
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#include <linux/inetdevice.h>
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#include <linux/rtnetlink.h>
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#include <linux/rtnetlink.h>
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#include <linux/brlock.h>
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#include <linux/brlock.h>
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#include <asm/uaccess.h>
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#include <asm/uaccess.h>
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#include "br_private.h"
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#include "br_private.h"
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static struct net_bridge *bridge_list;
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static struct net_bridge *bridge_list;
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static int br_initial_port_cost(struct net_device *dev)
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static int br_initial_port_cost(struct net_device *dev)
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{
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{
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if (!strncmp(dev->name, "lec", 3))
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if (!strncmp(dev->name, "lec", 3))
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return 7;
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return 7;
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if (!strncmp(dev->name, "eth", 3))
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if (!strncmp(dev->name, "eth", 3))
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return 100; /* FIXME handle 100Mbps */
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return 100; /* FIXME handle 100Mbps */
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if (!strncmp(dev->name, "plip", 4))
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if (!strncmp(dev->name, "plip", 4))
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return 2500;
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return 2500;
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return 100;
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return 100;
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}
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}
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/* called under BR_NETPROTO_LOCK and bridge lock */
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/* called under BR_NETPROTO_LOCK and bridge lock */
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static int __br_del_if(struct net_bridge *br, struct net_device *dev)
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static int __br_del_if(struct net_bridge *br, struct net_device *dev)
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{
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{
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struct net_bridge_port *p;
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struct net_bridge_port *p;
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struct net_bridge_port **pptr;
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struct net_bridge_port **pptr;
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if ((p = dev->br_port) == NULL)
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if ((p = dev->br_port) == NULL)
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return -EINVAL;
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return -EINVAL;
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br_stp_disable_port(p);
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br_stp_disable_port(p);
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dev_set_promiscuity(dev, -1);
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dev_set_promiscuity(dev, -1);
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dev->br_port = NULL;
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dev->br_port = NULL;
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pptr = &br->port_list;
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pptr = &br->port_list;
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while (*pptr != NULL) {
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while (*pptr != NULL) {
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if (*pptr == p) {
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if (*pptr == p) {
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*pptr = p->next;
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*pptr = p->next;
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break;
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break;
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}
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}
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pptr = &((*pptr)->next);
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pptr = &((*pptr)->next);
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}
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}
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br_fdb_delete_by_port(br, p);
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br_fdb_delete_by_port(br, p);
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kfree(p);
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kfree(p);
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dev_put(dev);
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dev_put(dev);
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return 0;
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return 0;
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}
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}
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static struct net_bridge **__find_br(char *name)
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static struct net_bridge **__find_br(char *name)
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{
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{
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struct net_bridge **b;
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struct net_bridge **b;
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struct net_bridge *br;
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struct net_bridge *br;
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b = &bridge_list;
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b = &bridge_list;
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while ((br = *b) != NULL) {
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while ((br = *b) != NULL) {
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if (!strncmp(br->dev.name, name, IFNAMSIZ))
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if (!strncmp(br->dev.name, name, IFNAMSIZ))
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return b;
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return b;
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b = &(br->next);
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b = &(br->next);
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}
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}
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return NULL;
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return NULL;
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}
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}
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static void del_ifs(struct net_bridge *br)
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static void del_ifs(struct net_bridge *br)
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{
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{
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br_write_lock_bh(BR_NETPROTO_LOCK);
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br_write_lock_bh(BR_NETPROTO_LOCK);
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write_lock(&br->lock);
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write_lock(&br->lock);
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while (br->port_list != NULL)
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while (br->port_list != NULL)
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__br_del_if(br, br->port_list->dev);
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__br_del_if(br, br->port_list->dev);
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write_unlock(&br->lock);
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write_unlock(&br->lock);
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br_write_unlock_bh(BR_NETPROTO_LOCK);
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br_write_unlock_bh(BR_NETPROTO_LOCK);
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}
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}
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static struct net_bridge *new_nb(char *name)
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static struct net_bridge *new_nb(char *name)
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{
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{
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struct net_bridge *br;
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struct net_bridge *br;
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struct net_device *dev;
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struct net_device *dev;
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if ((br = kmalloc(sizeof(*br), GFP_KERNEL)) == NULL)
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if ((br = kmalloc(sizeof(*br), GFP_KERNEL)) == NULL)
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return NULL;
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return NULL;
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memset(br, 0, sizeof(*br));
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memset(br, 0, sizeof(*br));
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dev = &br->dev;
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dev = &br->dev;
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strncpy(dev->name, name, IFNAMSIZ);
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strncpy(dev->name, name, IFNAMSIZ);
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dev->priv = br;
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dev->priv = br;
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ether_setup(dev);
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ether_setup(dev);
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br_dev_setup(dev);
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br_dev_setup(dev);
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br->lock = RW_LOCK_UNLOCKED;
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br->lock = RW_LOCK_UNLOCKED;
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br->hash_lock = RW_LOCK_UNLOCKED;
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br->hash_lock = RW_LOCK_UNLOCKED;
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br->bridge_id.prio[0] = 0x80;
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br->bridge_id.prio[0] = 0x80;
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br->bridge_id.prio[1] = 0x00;
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br->bridge_id.prio[1] = 0x00;
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memset(br->bridge_id.addr, 0, ETH_ALEN);
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memset(br->bridge_id.addr, 0, ETH_ALEN);
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br->stp_enabled = 0;
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br->stp_enabled = 0;
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br->designated_root = br->bridge_id;
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br->designated_root = br->bridge_id;
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br->root_path_cost = 0;
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br->root_path_cost = 0;
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br->root_port = 0;
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br->root_port = 0;
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br->bridge_max_age = br->max_age = 20 * HZ;
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br->bridge_max_age = br->max_age = 20 * HZ;
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br->bridge_hello_time = br->hello_time = 2 * HZ;
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br->bridge_hello_time = br->hello_time = 2 * HZ;
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br->bridge_forward_delay = br->forward_delay = 15 * HZ;
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br->bridge_forward_delay = br->forward_delay = 15 * HZ;
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br->topology_change = 0;
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br->topology_change = 0;
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br->topology_change_detected = 0;
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br->topology_change_detected = 0;
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br_timer_clear(&br->hello_timer);
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br_timer_clear(&br->hello_timer);
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br_timer_clear(&br->tcn_timer);
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br_timer_clear(&br->tcn_timer);
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br_timer_clear(&br->topology_change_timer);
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br_timer_clear(&br->topology_change_timer);
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br->ageing_time = 300 * HZ;
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br->ageing_time = 300 * HZ;
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br->gc_interval = 4 * HZ;
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br->gc_interval = 4 * HZ;
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return br;
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return br;
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}
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}
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/* called under bridge lock */
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/* called under bridge lock */
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static struct net_bridge_port *new_nbp(struct net_bridge *br, struct net_device *dev)
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static struct net_bridge_port *new_nbp(struct net_bridge *br, struct net_device *dev)
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{
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{
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int i;
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int i;
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struct net_bridge_port *p;
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struct net_bridge_port *p;
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p = kmalloc(sizeof(*p), GFP_ATOMIC);
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p = kmalloc(sizeof(*p), GFP_ATOMIC);
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if (p == NULL)
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if (p == NULL)
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return p;
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return p;
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memset(p, 0, sizeof(*p));
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memset(p, 0, sizeof(*p));
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p->br = br;
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p->br = br;
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p->dev = dev;
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p->dev = dev;
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p->path_cost = br_initial_port_cost(dev);
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p->path_cost = br_initial_port_cost(dev);
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p->priority = 0x80;
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p->priority = 0x80;
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for (i=1;i<255;i++)
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for (i=1;i<255;i++)
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if (br_get_port(br, i) == NULL)
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if (br_get_port(br, i) == NULL)
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break;
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break;
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if (i == 255) {
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if (i == 255) {
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kfree(p);
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kfree(p);
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return NULL;
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return NULL;
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}
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}
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dev->br_port = p;
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dev->br_port = p;
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p->port_no = i;
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p->port_no = i;
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br_init_port(p);
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br_init_port(p);
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p->state = BR_STATE_DISABLED;
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p->state = BR_STATE_DISABLED;
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p->next = br->port_list;
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p->next = br->port_list;
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br->port_list = p;
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br->port_list = p;
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return p;
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return p;
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}
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}
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int br_add_bridge(char *name)
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int br_add_bridge(char *name)
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{
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{
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struct net_bridge *br;
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struct net_bridge *br;
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if ((br = new_nb(name)) == NULL)
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if ((br = new_nb(name)) == NULL)
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return -ENOMEM;
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return -ENOMEM;
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if (__dev_get_by_name(name) != NULL) {
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if (__dev_get_by_name(name) != NULL) {
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kfree(br);
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kfree(br);
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return -EEXIST;
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return -EEXIST;
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}
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}
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br->next = bridge_list;
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br->next = bridge_list;
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bridge_list = br;
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bridge_list = br;
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br_inc_use_count();
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br_inc_use_count();
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register_netdev(&br->dev);
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register_netdev(&br->dev);
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return 0;
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return 0;
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}
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}
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int br_del_bridge(char *name)
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int br_del_bridge(char *name)
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{
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{
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struct net_bridge **b;
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struct net_bridge **b;
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struct net_bridge *br;
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struct net_bridge *br;
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if ((b = __find_br(name)) == NULL)
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if ((b = __find_br(name)) == NULL)
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return -ENXIO;
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return -ENXIO;
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br = *b;
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br = *b;
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if (br->dev.flags & IFF_UP)
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if (br->dev.flags & IFF_UP)
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return -EBUSY;
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return -EBUSY;
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del_ifs(br);
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del_ifs(br);
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*b = br->next;
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*b = br->next;
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unregister_netdev(&br->dev);
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unregister_netdev(&br->dev);
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kfree(br);
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kfree(br);
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br_dec_use_count();
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br_dec_use_count();
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return 0;
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return 0;
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}
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}
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int br_add_if(struct net_bridge *br, struct net_device *dev)
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int br_add_if(struct net_bridge *br, struct net_device *dev)
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{
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{
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struct net_bridge_port *p;
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struct net_bridge_port *p;
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if (dev->br_port != NULL)
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if (dev->br_port != NULL)
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return -EBUSY;
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return -EBUSY;
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if (dev->flags & IFF_LOOPBACK || dev->type != ARPHRD_ETHER)
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if (dev->flags & IFF_LOOPBACK || dev->type != ARPHRD_ETHER)
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return -EINVAL;
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return -EINVAL;
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if (dev->hard_start_xmit == br_dev_xmit)
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if (dev->hard_start_xmit == br_dev_xmit)
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return -ELOOP;
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return -ELOOP;
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dev_hold(dev);
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dev_hold(dev);
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write_lock_bh(&br->lock);
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write_lock_bh(&br->lock);
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if ((p = new_nbp(br, dev)) == NULL) {
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if ((p = new_nbp(br, dev)) == NULL) {
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write_unlock_bh(&br->lock);
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write_unlock_bh(&br->lock);
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dev_put(dev);
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dev_put(dev);
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return -EXFULL;
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return -EXFULL;
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}
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}
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dev_set_promiscuity(dev, 1);
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dev_set_promiscuity(dev, 1);
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br_stp_recalculate_bridge_id(br);
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br_stp_recalculate_bridge_id(br);
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br_fdb_insert(br, p, dev->dev_addr, 1);
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br_fdb_insert(br, p, dev->dev_addr, 1);
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if ((br->dev.flags & IFF_UP) && (dev->flags & IFF_UP))
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if ((br->dev.flags & IFF_UP) && (dev->flags & IFF_UP))
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br_stp_enable_port(p);
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br_stp_enable_port(p);
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write_unlock_bh(&br->lock);
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write_unlock_bh(&br->lock);
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return 0;
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return 0;
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}
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}
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int br_del_if(struct net_bridge *br, struct net_device *dev)
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int br_del_if(struct net_bridge *br, struct net_device *dev)
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{
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{
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int retval;
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int retval;
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br_write_lock_bh(BR_NETPROTO_LOCK);
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br_write_lock_bh(BR_NETPROTO_LOCK);
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write_lock(&br->lock);
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write_lock(&br->lock);
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retval = __br_del_if(br, dev);
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retval = __br_del_if(br, dev);
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br_stp_recalculate_bridge_id(br);
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br_stp_recalculate_bridge_id(br);
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write_unlock(&br->lock);
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write_unlock(&br->lock);
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br_write_unlock_bh(BR_NETPROTO_LOCK);
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br_write_unlock_bh(BR_NETPROTO_LOCK);
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return retval;
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return retval;
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}
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}
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int br_get_bridge_ifindices(int *indices, int num)
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int br_get_bridge_ifindices(int *indices, int num)
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{
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{
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struct net_bridge *br;
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struct net_bridge *br;
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int i;
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int i;
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br = bridge_list;
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br = bridge_list;
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for (i=0;i<num;i++) {
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for (i=0;i<num;i++) {
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if (br == NULL)
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if (br == NULL)
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break;
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break;
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indices[i] = br->dev.ifindex;
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indices[i] = br->dev.ifindex;
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br = br->next;
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br = br->next;
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}
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}
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return i;
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return i;
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}
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}
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/* called under ioctl_lock */
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/* called under ioctl_lock */
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void br_get_port_ifindices(struct net_bridge *br, int *ifindices)
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void br_get_port_ifindices(struct net_bridge *br, int *ifindices)
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{
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{
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struct net_bridge_port *p;
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struct net_bridge_port *p;
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p = br->port_list;
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p = br->port_list;
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while (p != NULL) {
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while (p != NULL) {
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ifindices[p->port_no] = p->dev->ifindex;
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ifindices[p->port_no] = p->dev->ifindex;
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p = p->next;
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p = p->next;
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}
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}
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}
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}
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