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[NET]: allow 32 bit socket ioctl in 64 bit kernel 

Since the register_ioctl32_conversion() patch in the kernel is now obsolete,
provide another method to allow 32 bit user space ioctls to reach the kernel.

Signed-off-by: Shaun Pereira <spereira@tusc.com.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shaun Pereira 2006-03-21 23:58:08 -08:00 committed by David S. Miller
parent 67b52e554b
commit 89bbfc95d6
2 changed files with 27 additions and 0 deletions
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6
include/linux/net.h
View File

@ -143,6 +143,8 @@ struct proto_ops {
struct poll_table_struct *wait);
int (*ioctl) (struct socket *sock, unsigned int cmd,
unsigned long arg);
int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
unsigned long arg);
int (*listen) (struct socket *sock, int len);
int (*shutdown) (struct socket *sock, int flags);
int (*setsockopt)(struct socket *sock, int level,
@ -251,6 +253,8 @@ SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_
(file, sock, wait)) \
SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
unsigned long arg), (sock, cmd, arg)) \
SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \
unsigned long arg), (sock, cmd, arg)) \
SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
@ -275,6 +279,7 @@ static const struct proto_ops name##_ops = { \
.getname = __lock_##name##_getname, \
.poll = __lock_##name##_poll, \
.ioctl = __lock_##name##_ioctl, \
.compat_ioctl = __lock_##name##_compat_ioctl, \
.listen = __lock_##name##_listen, \
.shutdown = __lock_##name##_shutdown, \
.setsockopt = __lock_##name##_setsockopt, \
@ -283,6 +288,7 @@ static const struct proto_ops name##_ops = { \
.recvmsg = __lock_##name##_recvmsg, \
.mmap = __lock_##name##_mmap, \
};
#endif
#define MODULE_ALIAS_NETPROTO(proto) \

21
net/socket.c
View File

@ -107,6 +107,10 @@ static unsigned int sock_poll(struct file *file,
struct poll_table_struct *wait);
static long sock_ioctl(struct file *file,
unsigned int cmd, unsigned long arg);
#ifdef CONFIG_COMPAT
static long compat_sock_ioctl(struct file *file,
unsigned int cmd, unsigned long arg);
#endif
static int sock_fasync(int fd, struct file *filp, int on);
static ssize_t sock_readv(struct file *file, const struct iovec *vector,
unsigned long count, loff_t *ppos);
@ -128,6 +132,9 @@ static struct file_operations socket_file_ops = {
.aio_write = sock_aio_write,
.poll = sock_poll,
.unlocked_ioctl = sock_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = compat_sock_ioctl,
#endif
.mmap = sock_mmap,
.open = sock_no_open, /* special open code to disallow open via /proc */
.release = sock_close,
@ -2136,6 +2143,20 @@ void socket_seq_show(struct seq_file *seq)
}
#endif /* CONFIG_PROC_FS */
#ifdef CONFIG_COMPAT
static long compat_sock_ioctl(struct file *file, unsigned cmd,
unsigned long arg)
{
struct socket *sock = file->private_data;
int ret = -ENOIOCTLCMD;
if (sock->ops->compat_ioctl)
ret = sock->ops->compat_ioctl(sock, cmd, arg);
return ret;
}
#endif
/* ABI emulation layers need these two */
EXPORT_SYMBOL(move_addr_to_kernel);
EXPORT_SYMBOL(move_addr_to_user);