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net: provide __sys_shutdown_sock() that takes a socket

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No functional changes in this patch, needed to provide io_uring support
for shutdown(2).

Cc: netdev@vger.kernel.org
Cc: David S. Miller <davem@davemloft.net>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2020-09-05 11:13:35 -06:00
parent ce59fc69b1
commit b713c195d5
2 changed files with 13 additions and 3 deletions
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1
include/linux/socket.h
View file

@ -436,6 +436,7 @@ extern int __sys_getpeername(int fd, struct sockaddr __user *usockaddr,
int __user *usockaddr_len); int __user *usockaddr_len);
extern int __sys_socketpair(int family, int type, int protocol, extern int __sys_socketpair(int family, int type, int protocol,
int __user *usockvec); int __user *usockvec);
extern int __sys_shutdown_sock(struct socket *sock, int how);
extern int __sys_shutdown(int fd, int how); extern int __sys_shutdown(int fd, int how);
extern struct ns_common *get_net_ns(struct ns_common *ns); extern struct ns_common *get_net_ns(struct ns_common *ns);

15
net/socket.c
View file

@ -2192,6 +2192,17 @@ SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
* Shutdown a socket. * Shutdown a socket.
*/ */
int __sys_shutdown_sock(struct socket *sock, int how)
{
int err;
err = security_socket_shutdown(sock, how);
if (!err)
err = sock->ops->shutdown(sock, how);
return err;
}
int __sys_shutdown(int fd, int how) int __sys_shutdown(int fd, int how)
{ {
int err, fput_needed; int err, fput_needed;
@ -2199,9 +2210,7 @@ int __sys_shutdown(int fd, int how)
sock = sockfd_lookup_light(fd, &err, &fput_needed); sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (sock != NULL) { if (sock != NULL) {
err = security_socket_shutdown(sock, how); err = __sys_shutdown_sock(sock, how);
if (!err)
err = sock->ops->shutdown(sock, how);
fput_light(sock->file, fput_needed); fput_light(sock->file, fput_needed);
} }
return err; return err;