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>

1 files changed, 5 insertions, 3 deletions

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index f1e2b8cdf33c..938f37166788 100644
--- 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)