nfsd: Cleanup - Let nfsd4_lookup_stateid() take a cstate argument

The cstate already holds information about the session, and hence
the client id, so it makes more sense to pass that information
rather than the current practice of passing a 'minor version' number.
Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>

fs/nfsd/nfs4state.c

@@ -3781,12 +3781,14 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
 	}
 }
 
-static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask,
-				   struct nfs4_stid **s, bool sessions,
-				   struct nfsd_net *nn)
+static __be32
+nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
+		     stateid_t *stateid, unsigned char typemask,
+		     struct nfs4_stid **s, struct nfsd_net *nn)
 {
 	struct nfs4_client *cl;
 	__be32 status;
+	bool sessions = cstate->minorversion != 0;
 
 	if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
 		return nfserr_bad_stateid;
@@ -3832,9 +3834,9 @@ nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate,
 
 	nfs4_lock_state();
 
-	status = nfsd4_lookup_stateid(stateid,
+	status = nfsd4_lookup_stateid(cstate, stateid,
 				NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
-				&s, cstate->minorversion, nn);
+				&s, nn);
 	if (status)
 		goto out;
 	status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate));
@@ -4004,8 +4006,7 @@ nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
 		seqid, STATEID_VAL(stateid));
 
 	*stpp = NULL;
-	status = nfsd4_lookup_stateid(stateid, typemask, &s,
-				      cstate->minorversion, nn);
+	status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn);
 	if (status)
 		return status;
 	stp = openlockstateid(s);
@@ -4229,8 +4230,7 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		return status;
 
 	nfs4_lock_state();
-	status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s,
-				      cstate->minorversion, nn);
+	status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn);
 	if (status)
 		goto out;
 	dp = delegstateid(s);