NFS: Clean up NFSv4 XDR error message

Make it more useful for debugging purposes.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index f1e2b8c..938f371 100644 (file)
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -2080,9 +2080,11 @@ out:
 
 #define READ_BUF(nbytes)  do { \
        p = xdr_inline_decode(xdr, nbytes); \
-       if (!p) { \
-               printk(KERN_WARNING "%s: reply buffer overflowed in line %d.", \
-                               __FUNCTION__, __LINE__); \
+       if (unlikely(!p)) { \
+               printk(KERN_INFO "%s: prematurely hit end of receive" \
+                               " buffer\n", __FUNCTION__); \
+               printk(KERN_INFO "%s: xdr->p=%p, bytes=%u, xdr->end=%p\n", \
+                               __FUNCTION__, xdr->p, nbytes, xdr->end); \
                return -EIO; \
        } \
 } while (0)