nfsd: fix the check for confirmed openowner in nfs4_preprocess_stateid_op

commit ebe9cb3bb13e7b9b281969cd279ce70834f7500f upstream.

If we find a non-confirmed openowner we jump to exit the function, but do
not set an error value.  Fix this by factoring out a helper to do the
check and properly set the error from nfsd4_validate_stateid.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 6e91f8b..d455ea0 100644 (file)
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3272,10 +3272,17 @@ static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_sess
        return nfserr_old_stateid;
 }
 
+static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols)
+{
+       if (ols->st_stateowner->so_is_open_owner &&
+           !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
+               return nfserr_bad_stateid;
+       return nfs_ok;
+}
+
 __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
 {
        struct nfs4_stid *s;
-       struct nfs4_ol_stateid *ols;
        __be32 status;
 
        if (STALE_STATEID(stateid))
@@ -3289,11 +3296,7 @@ __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
                return status;
        if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID)))
                return nfs_ok;
-       ols = openlockstateid(s);
-       if (ols->st_stateowner->so_is_open_owner
-           && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
-               return nfserr_bad_stateid;
-       return nfs_ok;
+       return nfsd4_check_openowner_confirmed(openlockstateid(s));
 }
 
 static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s)
@@ -3360,8 +3363,8 @@ nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
                status = nfs4_check_fh(current_fh, stp);
                if (status)
                        goto out;
-               if (stp->st_stateowner->so_is_open_owner
-                   && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED))
+               status = nfsd4_check_openowner_confirmed(stp);
+               if (status)
                        goto out;
                status = nfs4_check_openmode(stp, flags);
                if (status)