diff options
| author | Jens Axboe <axboe@kernel.dk> | 2019-11-23 14:17:16 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-11-25 19:56:11 -0700 |
| commit | bd3ded3146daa2cbb57ed353749ef99cf75371b0 (patch) | |
| tree | 72d55790cbd79afedf04b8fe819ae483eda22ea9 | |
| parent | c4a2ed72c9a61594b6afc23e1fbc78878d32b5a3 (diff) | |
| download | lwn-bd3ded3146daa2cbb57ed353749ef99cf75371b0.tar.gz lwn-bd3ded3146daa2cbb57ed353749ef99cf75371b0.zip | |
net: add __sys_connect_file() helper
This is identical to __sys_connect(), except it takes a struct file
instead of an fd, and it also allows passing in extra file->f_flags
flags. The latter is done to support masking in O_NONBLOCK without
manipulating the original file flags.
No functional changes in this patch.
Cc: netdev@vger.kernel.org
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | include/linux/socket.h | 3 | ||||
| -rw-r--r-- | net/socket.c | 30 |
2 files changed, 25 insertions, 8 deletions
diff --git a/include/linux/socket.h b/include/linux/socket.h index 09c32a21555b..4bde63021c09 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -399,6 +399,9 @@ extern int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr, int __user *upeer_addrlen, int flags); extern int __sys_socket(int family, int type, int protocol); extern int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen); +extern int __sys_connect_file(struct file *file, + struct sockaddr __user *uservaddr, int addrlen, + int file_flags); extern int __sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen); extern int __sys_listen(int fd, int backlog); diff --git a/net/socket.c b/net/socket.c index 17bc1eee198a..274df4ddfc2c 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1825,32 +1825,46 @@ SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, * include the -EINPROGRESS status for such sockets. */ -int __sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen) +int __sys_connect_file(struct file *file, struct sockaddr __user *uservaddr, + int addrlen, int file_flags) { struct socket *sock; struct sockaddr_storage address; - int err, fput_needed; + int err; - sock = sockfd_lookup_light(fd, &err, &fput_needed); + sock = sock_from_file(file, &err); if (!sock) goto out; err = move_addr_to_kernel(uservaddr, addrlen, &address); if (err < 0) - goto out_put; + goto out; err = security_socket_connect(sock, (struct sockaddr *)&address, addrlen); if (err) - goto out_put; + goto out; err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, - sock->file->f_flags); -out_put: - fput_light(sock->file, fput_needed); + sock->file->f_flags | file_flags); out: return err; } +int __sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen) +{ + int ret = -EBADF; + struct fd f; + + f = fdget(fd); + if (f.file) { + ret = __sys_connect_file(f.file, uservaddr, addrlen, 0); + if (f.flags) + fput(f.file); + } + + return ret; +} + SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, int, addrlen) { |