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[NET]: Round out in-kernel sockets API 

This patch implements wrapper functions that provide a convenient way
to access the sockets API for in-kernel users like sunrpc, cifs &
ocfs2 etc and any future users.

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sridhar Samudrala 2006-08-07 20:57:31 -07:00 committed by David S. Miller
parent b63bbc5006
commit ac5a488ef2
2 changed files with 132 additions and 0 deletions
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19
include/linux/net.h
View File

@ -208,6 +208,25 @@ extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
struct kvec *vec, size_t num,
size_t len, int flags);
extern int kernel_bind(struct socket *sock, struct sockaddr *addr,
int addrlen);
extern int kernel_listen(struct socket *sock, int backlog);
extern int kernel_accept(struct socket *sock, struct socket **newsock,
int flags);
extern int kernel_connect(struct socket *sock, struct sockaddr *addr,
int addrlen, int flags);
extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
int *addrlen);
extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
int *addrlen);
extern int kernel_getsockopt(struct socket *sock, int level, int optname,
char *optval, int *optlen);
extern int kernel_setsockopt(struct socket *sock, int level, int optname,
char *optval, int optlen);
extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
size_t size, int flags);
extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
#ifndef CONFIG_SMP
#define SOCKOPS_WRAPPED(name) name
#define SOCKOPS_WRAP(name, fam)

113
net/socket.c
View File

@ -2170,6 +2170,109 @@ static long compat_sock_ioctl(struct file *file, unsigned cmd,
}
#endif
int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen)
{
return sock->ops->bind(sock, addr, addrlen);
}
int kernel_listen(struct socket *sock, int backlog)
{
return sock->ops->listen(sock, backlog);
}
int kernel_accept(struct socket *sock, struct socket **newsock, int flags)
{
struct sock *sk = sock->sk;
int err;
err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol,
newsock);
if (err < 0)
goto done;
err = sock->ops->accept(sock, *newsock, flags);
if (err < 0) {
sock_release(*newsock);
goto done;
}
(*newsock)->ops = sock->ops;
done:
return err;
}
int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
int flags)
{
return sock->ops->connect(sock, addr, addrlen, flags);
}
int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
int *addrlen)
{
return sock->ops->getname(sock, addr, addrlen, 0);
}
int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
int *addrlen)
{
return sock->ops->getname(sock, addr, addrlen, 1);
}
int kernel_getsockopt(struct socket *sock, int level, int optname,
char *optval, int *optlen)
{
mm_segment_t oldfs = get_fs();
int err;
set_fs(KERNEL_DS);
if (level == SOL_SOCKET)
err = sock_getsockopt(sock, level, optname, optval, optlen);
else
err = sock->ops->getsockopt(sock, level, optname, optval,
optlen);
set_fs(oldfs);
return err;
}
int kernel_setsockopt(struct socket *sock, int level, int optname,
char *optval, int optlen)
{
mm_segment_t oldfs = get_fs();
int err;
set_fs(KERNEL_DS);
if (level == SOL_SOCKET)
err = sock_setsockopt(sock, level, optname, optval, optlen);
else
err = sock->ops->setsockopt(sock, level, optname, optval,
optlen);
set_fs(oldfs);
return err;
}
int kernel_sendpage(struct socket *sock, struct page *page, int offset,
size_t size, int flags)
{
if (sock->ops->sendpage)
return sock->ops->sendpage(sock, page, offset, size, flags);
return sock_no_sendpage(sock, page, offset, size, flags);
}
int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg)
{
mm_segment_t oldfs = get_fs();
int err;
set_fs(KERNEL_DS);
err = sock->ops->ioctl(sock, cmd, arg);
set_fs(oldfs);
return err;
}
/* ABI emulation layers need these two */
EXPORT_SYMBOL(move_addr_to_kernel);
EXPORT_SYMBOL(move_addr_to_user);
@ -2186,3 +2289,13 @@ EXPORT_SYMBOL(sock_wake_async);
EXPORT_SYMBOL(sockfd_lookup);
EXPORT_SYMBOL(kernel_sendmsg);
EXPORT_SYMBOL(kernel_recvmsg);
EXPORT_SYMBOL(kernel_bind);
EXPORT_SYMBOL(kernel_listen);
EXPORT_SYMBOL(kernel_accept);
EXPORT_SYMBOL(kernel_connect);
EXPORT_SYMBOL(kernel_getsockname);
EXPORT_SYMBOL(kernel_getpeername);
EXPORT_SYMBOL(kernel_getsockopt);
EXPORT_SYMBOL(kernel_setsockopt);
EXPORT_SYMBOL(kernel_sendpage);
EXPORT_SYMBOL(kernel_sock_ioctl);