nfsd4: fix seqid_mutating_error

The set of errors here does *not* agree with the set of errors specified
in the rfc!

While we're there, turn this macros into a function, for the usual
reasons, and move it to the one place where it's actually used.

Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index c8bf405d19de..f81099605256 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1623,6 +1623,18 @@ static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
                                                                 \
         save = resp->p;
 
+static bool seqid_mutating_err(__be32 err)
+{
+        /* rfc 3530 section 8.1.5: */
+        return  err != nfserr_stale_clientid &&
+                err != nfserr_stale_stateid &&
+                err != nfserr_bad_stateid &&
+                err != nfserr_bad_seqid &&
+                err != nfserr_bad_xdr &&
+                err != nfserr_resource &&
+                err != nfserr_nofilehandle;
+}
+
 /*
  * Routine for encoding the result of a "seqid-mutating" NFSv4 operation.  This
  * is where sequence id's are incremented, and the replay cache is filled.