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Commit 01e97e65 authored by Al Viro's avatar Al Viro
Browse files

new helper: msg_data_left() 



convert open-coded instances

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent a2dd3793

crypto/algif_hash.c

+2 −2
Original line number Diff line number Diff line
@@ -56,8 +56,8 @@ static int hash_sendmsg(struct socket *sock, struct msghdr *msg, 


	ctx->more = 0;



	while (iov_iter_count(&msg->msg_iter)) {

		int len = iov_iter_count(&msg->msg_iter);

	while (msg_data_left(msg)) {

		int len = msg_data_left(msg);



		if (len > limit)

			len = limit;

crypto/algif_skcipher.c

+2 −2
Original line number Diff line number Diff line
@@ -641,7 +641,7 @@ static int skcipher_recvmsg_sync(struct socket *sock, struct msghdr *msg, 
	long copied = 0;



	lock_sock(sk);

	while (iov_iter_count(&msg->msg_iter)) {

	while (msg_data_left(msg)) {

		sgl = list_first_entry(&ctx->tsgl,

				       struct skcipher_sg_list, list);

		sg = sgl->sg;
@@ -655,7 +655,7 @@ static int skcipher_recvmsg_sync(struct socket *sock, struct msghdr *msg, 
				goto unlock;

		}



		used = min_t(unsigned long, ctx->used, iov_iter_count(&msg->msg_iter));

		used = min_t(unsigned long, ctx->used, msg_data_left(msg));



		used = af_alg_make_sg(&ctx->rsgl, &msg->msg_iter, used);

		err = used;

drivers/vhost/net.c

+2 −2
Original line number Diff line number Diff line
@@ -357,13 +357,13 @@ static void handle_tx(struct vhost_net *net) 
		iov_iter_init(&msg.msg_iter, WRITE, vq->iov, out, len);

		iov_iter_advance(&msg.msg_iter, hdr_size);

		/* Sanity check */

		if (!iov_iter_count(&msg.msg_iter)) {

		if (!msg_data_left(&msg)) {

			vq_err(vq, "Unexpected header len for TX: "

			       "%zd expected %zd\n",

			       len, hdr_size);

			break;

		}

		len = iov_iter_count(&msg.msg_iter);

		len = msg_data_left(&msg);



		zcopy_used = zcopy && len >= VHOST_GOODCOPY_LEN

				   && (nvq->upend_idx + 1) % UIO_MAXIOV !=

include/linux/socket.h

+5 −0
Original line number Diff line number Diff line
@@ -139,6 +139,11 @@ static inline struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr 
	return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);

}



static inline size_t msg_data_left(struct msghdr *msg)

{

	return iov_iter_count(&msg->msg_iter);

}



/* "Socket"-level control message types: */



#define	SCM_RIGHTS	0x01		/* rw: access rights (array of int) */

net/core/datagram.c

+1 −1
Original line number Diff line number Diff line
@@ -673,7 +673,7 @@ int skb_copy_and_csum_datagram_msg(struct sk_buff *skb, 
	if (!chunk)

		return 0;



	if (iov_iter_count(&msg->msg_iter) < chunk) {

	if (msg_data_left(msg) < chunk) {

		if (__skb_checksum_complete(skb))

			goto csum_error;

		if (skb_copy_datagram_msg(skb, hlen, msg, chunk))