mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-30 06:25:03 +08:00
7c0f6ba682
This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
218 lines
4.9 KiB
C
218 lines
4.9 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/in.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/string.h>
|
|
#include <linux/sockios.h>
|
|
#include <linux/net.h>
|
|
#include <linux/slab.h>
|
|
#include <net/ax25.h>
|
|
#include <linux/inet.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <net/sock.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/fcntl.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
static struct ax25_protocol *protocol_list;
|
|
static DEFINE_RWLOCK(protocol_list_lock);
|
|
|
|
static HLIST_HEAD(ax25_linkfail_list);
|
|
static DEFINE_SPINLOCK(linkfail_lock);
|
|
|
|
static struct listen_struct {
|
|
struct listen_struct *next;
|
|
ax25_address callsign;
|
|
struct net_device *dev;
|
|
} *listen_list = NULL;
|
|
static DEFINE_SPINLOCK(listen_lock);
|
|
|
|
/*
|
|
* Do not register the internal protocols AX25_P_TEXT, AX25_P_SEGMENT,
|
|
* AX25_P_IP or AX25_P_ARP ...
|
|
*/
|
|
void ax25_register_pid(struct ax25_protocol *ap)
|
|
{
|
|
write_lock_bh(&protocol_list_lock);
|
|
ap->next = protocol_list;
|
|
protocol_list = ap;
|
|
write_unlock_bh(&protocol_list_lock);
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ax25_register_pid);
|
|
|
|
void ax25_protocol_release(unsigned int pid)
|
|
{
|
|
struct ax25_protocol *protocol;
|
|
|
|
write_lock_bh(&protocol_list_lock);
|
|
protocol = protocol_list;
|
|
if (protocol == NULL)
|
|
goto out;
|
|
|
|
if (protocol->pid == pid) {
|
|
protocol_list = protocol->next;
|
|
goto out;
|
|
}
|
|
|
|
while (protocol != NULL && protocol->next != NULL) {
|
|
if (protocol->next->pid == pid) {
|
|
protocol->next = protocol->next->next;
|
|
goto out;
|
|
}
|
|
|
|
protocol = protocol->next;
|
|
}
|
|
out:
|
|
write_unlock_bh(&protocol_list_lock);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ax25_protocol_release);
|
|
|
|
void ax25_linkfail_register(struct ax25_linkfail *lf)
|
|
{
|
|
spin_lock_bh(&linkfail_lock);
|
|
hlist_add_head(&lf->lf_node, &ax25_linkfail_list);
|
|
spin_unlock_bh(&linkfail_lock);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ax25_linkfail_register);
|
|
|
|
void ax25_linkfail_release(struct ax25_linkfail *lf)
|
|
{
|
|
spin_lock_bh(&linkfail_lock);
|
|
hlist_del_init(&lf->lf_node);
|
|
spin_unlock_bh(&linkfail_lock);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ax25_linkfail_release);
|
|
|
|
int ax25_listen_register(ax25_address *callsign, struct net_device *dev)
|
|
{
|
|
struct listen_struct *listen;
|
|
|
|
if (ax25_listen_mine(callsign, dev))
|
|
return 0;
|
|
|
|
if ((listen = kmalloc(sizeof(*listen), GFP_ATOMIC)) == NULL)
|
|
return -ENOMEM;
|
|
|
|
listen->callsign = *callsign;
|
|
listen->dev = dev;
|
|
|
|
spin_lock_bh(&listen_lock);
|
|
listen->next = listen_list;
|
|
listen_list = listen;
|
|
spin_unlock_bh(&listen_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(ax25_listen_register);
|
|
|
|
void ax25_listen_release(ax25_address *callsign, struct net_device *dev)
|
|
{
|
|
struct listen_struct *s, *listen;
|
|
|
|
spin_lock_bh(&listen_lock);
|
|
listen = listen_list;
|
|
if (listen == NULL) {
|
|
spin_unlock_bh(&listen_lock);
|
|
return;
|
|
}
|
|
|
|
if (ax25cmp(&listen->callsign, callsign) == 0 && listen->dev == dev) {
|
|
listen_list = listen->next;
|
|
spin_unlock_bh(&listen_lock);
|
|
kfree(listen);
|
|
return;
|
|
}
|
|
|
|
while (listen != NULL && listen->next != NULL) {
|
|
if (ax25cmp(&listen->next->callsign, callsign) == 0 && listen->next->dev == dev) {
|
|
s = listen->next;
|
|
listen->next = listen->next->next;
|
|
spin_unlock_bh(&listen_lock);
|
|
kfree(s);
|
|
return;
|
|
}
|
|
|
|
listen = listen->next;
|
|
}
|
|
spin_unlock_bh(&listen_lock);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ax25_listen_release);
|
|
|
|
int (*ax25_protocol_function(unsigned int pid))(struct sk_buff *, ax25_cb *)
|
|
{
|
|
int (*res)(struct sk_buff *, ax25_cb *) = NULL;
|
|
struct ax25_protocol *protocol;
|
|
|
|
read_lock(&protocol_list_lock);
|
|
for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
|
|
if (protocol->pid == pid) {
|
|
res = protocol->func;
|
|
break;
|
|
}
|
|
read_unlock(&protocol_list_lock);
|
|
|
|
return res;
|
|
}
|
|
|
|
int ax25_listen_mine(ax25_address *callsign, struct net_device *dev)
|
|
{
|
|
struct listen_struct *listen;
|
|
|
|
spin_lock_bh(&listen_lock);
|
|
for (listen = listen_list; listen != NULL; listen = listen->next)
|
|
if (ax25cmp(&listen->callsign, callsign) == 0 &&
|
|
(listen->dev == dev || listen->dev == NULL)) {
|
|
spin_unlock_bh(&listen_lock);
|
|
return 1;
|
|
}
|
|
spin_unlock_bh(&listen_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ax25_link_failed(ax25_cb *ax25, int reason)
|
|
{
|
|
struct ax25_linkfail *lf;
|
|
|
|
spin_lock_bh(&linkfail_lock);
|
|
hlist_for_each_entry(lf, &ax25_linkfail_list, lf_node)
|
|
lf->func(ax25, reason);
|
|
spin_unlock_bh(&linkfail_lock);
|
|
}
|
|
|
|
int ax25_protocol_is_registered(unsigned int pid)
|
|
{
|
|
struct ax25_protocol *protocol;
|
|
int res = 0;
|
|
|
|
read_lock_bh(&protocol_list_lock);
|
|
for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
|
|
if (protocol->pid == pid) {
|
|
res = 1;
|
|
break;
|
|
}
|
|
read_unlock_bh(&protocol_list_lock);
|
|
|
|
return res;
|
|
}
|