mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-06 02:24:14 +08:00
0ca7a4c87d
Don't register/unregister every ax25 table in a batch. Instead register and unregister per device ax25 sysctls as ax25 devices come and go. This moves ax25 to be a completely modern sysctl user. Registering the sysctls in just the initial network namespace, removing the use of .child entries that are no longer natively supported by the sysctl core and taking advantage of the fact that there are no longer any ordering constraints between registering and unregistering different sysctl tables. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
199 lines
4.7 KiB
C
199 lines
4.7 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
|
|
*/
|
|
#include <linux/errno.h>
|
|
#include <linux/types.h>
|
|
#include <linux/socket.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/in.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/string.h>
|
|
#include <linux/sockios.h>
|
|
#include <linux/net.h>
|
|
#include <linux/spinlock.h>
|
|
#include <net/ax25.h>
|
|
#include <linux/inet.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/if_arp.h>
|
|
#include <linux/skbuff.h>
|
|
#include <net/sock.h>
|
|
#include <asm/uaccess.h>
|
|
#include <linux/fcntl.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/init.h>
|
|
|
|
ax25_dev *ax25_dev_list;
|
|
DEFINE_SPINLOCK(ax25_dev_lock);
|
|
|
|
ax25_dev *ax25_addr_ax25dev(ax25_address *addr)
|
|
{
|
|
ax25_dev *ax25_dev, *res = NULL;
|
|
|
|
spin_lock_bh(&ax25_dev_lock);
|
|
for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
|
|
if (ax25cmp(addr, (ax25_address *)ax25_dev->dev->dev_addr) == 0) {
|
|
res = ax25_dev;
|
|
}
|
|
spin_unlock_bh(&ax25_dev_lock);
|
|
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* This is called when an interface is brought up. These are
|
|
* reasonable defaults.
|
|
*/
|
|
void ax25_dev_device_up(struct net_device *dev)
|
|
{
|
|
ax25_dev *ax25_dev;
|
|
|
|
if ((ax25_dev = kzalloc(sizeof(*ax25_dev), GFP_ATOMIC)) == NULL) {
|
|
printk(KERN_ERR "AX.25: ax25_dev_device_up - out of memory\n");
|
|
return;
|
|
}
|
|
|
|
dev->ax25_ptr = ax25_dev;
|
|
ax25_dev->dev = dev;
|
|
dev_hold(dev);
|
|
ax25_dev->forward = NULL;
|
|
|
|
ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE;
|
|
ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE;
|
|
ax25_dev->values[AX25_VALUES_BACKOFF] = AX25_DEF_BACKOFF;
|
|
ax25_dev->values[AX25_VALUES_CONMODE] = AX25_DEF_CONMODE;
|
|
ax25_dev->values[AX25_VALUES_WINDOW] = AX25_DEF_WINDOW;
|
|
ax25_dev->values[AX25_VALUES_EWINDOW] = AX25_DEF_EWINDOW;
|
|
ax25_dev->values[AX25_VALUES_T1] = AX25_DEF_T1;
|
|
ax25_dev->values[AX25_VALUES_T2] = AX25_DEF_T2;
|
|
ax25_dev->values[AX25_VALUES_T3] = AX25_DEF_T3;
|
|
ax25_dev->values[AX25_VALUES_IDLE] = AX25_DEF_IDLE;
|
|
ax25_dev->values[AX25_VALUES_N2] = AX25_DEF_N2;
|
|
ax25_dev->values[AX25_VALUES_PACLEN] = AX25_DEF_PACLEN;
|
|
ax25_dev->values[AX25_VALUES_PROTOCOL] = AX25_DEF_PROTOCOL;
|
|
ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT;
|
|
|
|
#if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
|
|
ax25_ds_setup_timer(ax25_dev);
|
|
#endif
|
|
|
|
spin_lock_bh(&ax25_dev_lock);
|
|
ax25_dev->next = ax25_dev_list;
|
|
ax25_dev_list = ax25_dev;
|
|
spin_unlock_bh(&ax25_dev_lock);
|
|
|
|
ax25_register_dev_sysctl(ax25_dev);
|
|
}
|
|
|
|
void ax25_dev_device_down(struct net_device *dev)
|
|
{
|
|
ax25_dev *s, *ax25_dev;
|
|
|
|
if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
|
|
return;
|
|
|
|
ax25_unregister_dev_sysctl(ax25_dev);
|
|
|
|
spin_lock_bh(&ax25_dev_lock);
|
|
|
|
#ifdef CONFIG_AX25_DAMA_SLAVE
|
|
ax25_ds_del_timer(ax25_dev);
|
|
#endif
|
|
|
|
/*
|
|
* Remove any packet forwarding that points to this device.
|
|
*/
|
|
for (s = ax25_dev_list; s != NULL; s = s->next)
|
|
if (s->forward == dev)
|
|
s->forward = NULL;
|
|
|
|
if ((s = ax25_dev_list) == ax25_dev) {
|
|
ax25_dev_list = s->next;
|
|
spin_unlock_bh(&ax25_dev_lock);
|
|
dev_put(dev);
|
|
kfree(ax25_dev);
|
|
return;
|
|
}
|
|
|
|
while (s != NULL && s->next != NULL) {
|
|
if (s->next == ax25_dev) {
|
|
s->next = ax25_dev->next;
|
|
spin_unlock_bh(&ax25_dev_lock);
|
|
dev_put(dev);
|
|
kfree(ax25_dev);
|
|
return;
|
|
}
|
|
|
|
s = s->next;
|
|
}
|
|
spin_unlock_bh(&ax25_dev_lock);
|
|
dev->ax25_ptr = NULL;
|
|
}
|
|
|
|
int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd)
|
|
{
|
|
ax25_dev *ax25_dev, *fwd_dev;
|
|
|
|
if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL)
|
|
return -EINVAL;
|
|
|
|
switch (cmd) {
|
|
case SIOCAX25ADDFWD:
|
|
if ((fwd_dev = ax25_addr_ax25dev(&fwd->port_to)) == NULL)
|
|
return -EINVAL;
|
|
if (ax25_dev->forward != NULL)
|
|
return -EINVAL;
|
|
ax25_dev->forward = fwd_dev->dev;
|
|
break;
|
|
|
|
case SIOCAX25DELFWD:
|
|
if (ax25_dev->forward == NULL)
|
|
return -EINVAL;
|
|
ax25_dev->forward = NULL;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct net_device *ax25_fwd_dev(struct net_device *dev)
|
|
{
|
|
ax25_dev *ax25_dev;
|
|
|
|
if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
|
|
return dev;
|
|
|
|
if (ax25_dev->forward == NULL)
|
|
return dev;
|
|
|
|
return ax25_dev->forward;
|
|
}
|
|
|
|
/*
|
|
* Free all memory associated with device structures.
|
|
*/
|
|
void __exit ax25_dev_free(void)
|
|
{
|
|
ax25_dev *s, *ax25_dev;
|
|
|
|
spin_lock_bh(&ax25_dev_lock);
|
|
ax25_dev = ax25_dev_list;
|
|
while (ax25_dev != NULL) {
|
|
s = ax25_dev;
|
|
dev_put(ax25_dev->dev);
|
|
ax25_dev = ax25_dev->next;
|
|
kfree(s);
|
|
}
|
|
ax25_dev_list = NULL;
|
|
spin_unlock_bh(&ax25_dev_lock);
|
|
}
|