NLM: Fix sign of length of NLM variable length strings

According to The Open Group's NLM specification, NLM callers are variable
length strings.  XDR variable length strings use an unsigned 32 bit length.
And internally, negative string lengths are not meaningful for the Linux
NLM implementation.

Clean up: Make nlm_lock.len and nlm_reboot.len unsigned integers.  This
makes the sign of NLM string lengths consistent with the sign of xdr_netobj
lengths.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Acked-By: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/lockd/xdr.h b/include/linux/lockd/xdr.h
index 83a1f9f6237b..df18fa053bcd 100644
--- a/include/linux/lockd/xdr.h
+++ b/include/linux/lockd/xdr.h
@@ -29,7 +29,7 @@ struct svc_rqst;
 /* Lock info passed via NLM */
 struct nlm_lock {
         char *                  caller;
-        int                     len;    /* length of "caller" */
+        unsigned int            len;    /* length of "caller" */
         struct nfs_fh           fh;
         struct xdr_netobj       oh;
         u32                     svid;
@@ -78,7 +78,7 @@ struct nlm_res {
  */
 struct nlm_reboot {
         char *          mon;
-        int             len;
+        unsigned int    len;
         u32             state;
         __be32          addr;
         __be32          vers;