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authorChuck Lever <chuck.lever@oracle.com>2017-08-03 21:30:11 +0300
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2017-08-08 17:52:00 +0300
commit41c8f70f5a3db7e06179186b6525fd9ee1d7d314 (patch)
tree881602134bc470c4bc2bceeee5f0f420d1b5c2d4 /include/linux/sunrpc
parent96f8778f70d0f5b988146d757a26dcd5d5b44116 (diff)
downloadlinux-41c8f70f5a3db7e06179186b6525fd9ee1d7d314.tar.xz
xprtrdma: Harden backchannel call decoding
Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'include/linux/sunrpc')
-rw-r--r--include/linux/sunrpc/xdr.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h
index 261b48a2701d..86b59e3525a5 100644
--- a/include/linux/sunrpc/xdr.h
+++ b/include/linux/sunrpc/xdr.h
@@ -239,6 +239,19 @@ extern unsigned int xdr_read_pages(struct xdr_stream *xdr, unsigned int len);
extern void xdr_enter_page(struct xdr_stream *xdr, unsigned int len);
extern int xdr_process_buf(struct xdr_buf *buf, unsigned int offset, unsigned int len, int (*actor)(struct scatterlist *, void *), void *data);
+/**
+ * xdr_stream_remaining - Return the number of bytes remaining in the stream
+ * @xdr: pointer to struct xdr_stream
+ *
+ * Return value:
+ * Number of bytes remaining in @xdr before xdr->end
+ */
+static inline size_t
+xdr_stream_remaining(const struct xdr_stream *xdr)
+{
+ return xdr->nwords << 2;
+}
+
ssize_t xdr_stream_decode_string_dup(struct xdr_stream *xdr, char **str,
size_t maxlen, gfp_t gfp_flags);
/**