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[net] drop 'size' argument of sock_recvmsg()

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all callers have it equal to msg_data_left(msg).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-03-14 21:13:46 -04:00
parent f55532a0c0
commit 2da62906b1
3 changed files with 13 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

23
net/socket.c
View file

@ -709,17 +709,16 @@ void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops);
static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
size_t size, int flags)
int flags)
{
return sock->ops->recvmsg(sock, msg, size, flags);
return sock->ops->recvmsg(sock, msg, msg_data_left(msg), flags);
}
int sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
int flags)
int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags)
{
int err = security_socket_recvmsg(sock, msg, size, flags);
int err = security_socket_recvmsg(sock, msg, msg_data_left(msg), flags);
return err ?: sock_recvmsg_nosec(sock, msg, size, flags);
return err ?: sock_recvmsg_nosec(sock, msg, flags);
}
EXPORT_SYMBOL(sock_recvmsg);
@ -746,7 +745,7 @@ int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
iov_iter_kvec(&msg->msg_iter, READ | ITER_KVEC, vec, num, size);
set_fs(KERNEL_DS);
result = sock_recvmsg(sock, msg, size, flags);
result = sock_recvmsg(sock, msg, flags);
set_fs(oldfs);
return result;
}
@ -796,7 +795,7 @@ static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to)
if (!iov_iter_count(to)) /* Match SYS5 behaviour */
return 0;
res = sock_recvmsg(sock, &msg, iov_iter_count(to), msg.msg_flags);
res = sock_recvmsg(sock, &msg, msg.msg_flags);
*to = msg.msg_iter;
return res;
}
@ -1696,7 +1695,7 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
msg.msg_iocb = NULL;
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = sock_recvmsg(sock, &msg, iov_iter_count(&msg.msg_iter), flags);
err = sock_recvmsg(sock, &msg, flags);
if (err >= 0 && addr != NULL) {
err2 = move_addr_to_user(&address,
@ -2073,7 +2072,7 @@ static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg,
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov = iovstack;
unsigned long cmsg_ptr;
int total_len, len;
int len;
ssize_t err;
/* kernel mode address */
@ -2091,7 +2090,6 @@ static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg,
err = copy_msghdr_from_user(msg_sys, msg, &uaddr, &iov);
if (err < 0)
return err;
total_len = iov_iter_count(&msg_sys->msg_iter);
cmsg_ptr = (unsigned long)msg_sys->msg_control;
msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
@ -2101,8 +2099,7 @@ static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg,
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
total_len, flags);
err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, flags);
if (err < 0)
goto out_freeiov;
len = err;