commit 2da62906b1e298695e1bb725927041cd59942c98
author Al Viro <viro@zeniv.linux.org.uk> Sat Mar 14 21:13:46 2015 -0400
committer Al Viro <viro@zeniv.linux.org.uk> Mon Mar 28 13:57:51 2016 -0400
tree b76045344084874d066a824f7bd1cdbd2a82d500
parent f55532a0c0b8bb6148f4e07853b876ef73bc69ca

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

all callers have it equal to msg_data_left(msg).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

net/socket.c

diff --git a/net/socket.c b/net/socket.c
index 5f77a8e..956426e3 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -709,17 +709,16 @@
 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 @@
 
 	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 @@
 	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 @@
 	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 @@
 	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 @@
 		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 @@
 
 	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;