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Commit cf187c2d authored by Trond Myklebust's avatar Trond Myklebust
Browse files

SUNRPC: Don't truncate tail data unnecessarily in xdr_shrink_pagelen 



If we have unused buffer space, then we should make use of that rather
than unnecessarily truncating the message.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 42d6d8ab

net/sunrpc/xdr.c

+10 −1
Original line number Diff line number Diff line
@@ -396,12 +396,21 @@ xdr_shrink_pagelen(struct xdr_buf *buf, size_t len) 
	struct kvec *tail;

	size_t copy;

	unsigned int pglen = buf->page_len;

	unsigned int tailbuf_len;



	tail = buf->tail;

	BUG_ON (len > pglen);



	tailbuf_len = buf->buflen - buf->head->iov_len - buf->page_len;



	/* Shift the tail first */

	if (tail->iov_len != 0) {

	if (tailbuf_len != 0) {

		unsigned int free_space = tailbuf_len - tail->iov_len;



		if (len < free_space)

			free_space = len;

		tail->iov_len += free_space;



		copy = len;

		if (tail->iov_len > len) {

			char *p = (char *)tail->iov_base + len;