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net: Split a __sys_listen helper for io_uring

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io_uring holds a reference to the file and maintains a sockaddr_storage
address.  Similarly to what was done to __sys_connect_file, split an
internal helper for __sys_listen in preparation to support an
io_uring listen command.

Reviewed-by: Jens Axboe <[email protected]>
Signed-off-by: Gabriel Krisman Bertazi <[email protected]>
Reviewed-by: Kuniyuki Iwashima <[email protected]>
Acked-by: Jakub Kicinski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Gabriel Krisman Bertazi authored and Jens Axboe committed 2024-06-19 07:57:21 -06:00
1 parent dc2e779794
commit bb6aaf7366
2 files changed
+15 -9
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include/linux/socket.h
+1
View File
@@ -449,6 +449,7 @@ extern int __sys_connect_file(struct file *file, struct sockaddr_storage *addr,
extern int __sys_connect(int fd, struct sockaddr __user *uservaddr,
int addrlen);
extern int __sys_listen(int fd, int backlog);
extern int __sys_listen_socket(struct socket *sock, int backlog);
extern int __sys_getsockname(int fd, struct sockaddr __user *usockaddr,
int __user *usockaddr_len);
extern int __sys_getpeername(int fd, struct sockaddr __user *usockaddr,
net/socket.c
+14 -9
View File
@@ -1870,23 +1870,28 @@ SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen)
* necessary for a listen, and if that works, we mark the socket as
* ready for listening.
*/
int __sys_listen_socket(struct socket *sock, int backlog)
{
int somaxconn, err;
somaxconn = READ_ONCE(sock_net(sock->sk)->core.sysctl_somaxconn);
if ((unsigned int)backlog > somaxconn)
backlog = somaxconn;
err = security_socket_listen(sock, backlog);
if (!err)
err = READ_ONCE(sock->ops)->listen(sock, backlog);
return err;
}
int __sys_listen(int fd, int backlog)
{
struct socket *sock;
int err, fput_needed;
int somaxconn;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (sock) {
somaxconn = READ_ONCE(sock_net(sock->sk)->core.sysctl_somaxconn);
if ((unsigned int)backlog > somaxconn)
backlog = somaxconn;
err = security_socket_listen(sock, backlog);
if (!err)
err = READ_ONCE(sock->ops)->listen(sock, backlog);
err = __sys_listen_socket(sock, backlog);
fput_light(sock->file, fput_needed);
}
return err;