nfs41: implement DESTROY_CLIENTID operation

[pandora-kernel.git] / fs / nfsd / nfs4state.c

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 1527aaf..47e94e3 100644 (file)
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1962,6 +1962,50 @@ out:
        return status;
 }
 
+static inline bool has_resources(struct nfs4_client *clp)
+{
+       return !list_empty(&clp->cl_openowners)
+               || !list_empty(&clp->cl_delegations)
+               || !list_empty(&clp->cl_sessions);
+}
+
+__be32
+nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc)
+{
+       struct nfs4_client *conf, *unconf, *clp;
+       int status = 0;
+
+       nfs4_lock_state();
+       unconf = find_unconfirmed_client(&dc->clientid);
+       conf = find_confirmed_client(&dc->clientid);
+
+       if (conf) {
+               clp = conf;
+
+               if (!is_client_expired(conf) && has_resources(conf)) {
+                       status = nfserr_clientid_busy;
+                       goto out;
+               }
+
+               /* rfc5661 18.50.3 */
+               if (cstate->session && conf == cstate->session->se_client) {
+                       status = nfserr_clientid_busy;
+                       goto out;
+               }
+       } else if (unconf)
+               clp = unconf;
+       else {
+               status = nfserr_stale_clientid;
+               goto out;
+       }
+
+       expire_client(clp);
+out:
+       nfs4_unlock_state();
+       dprintk("%s return %d\n", __func__, ntohl(status));
+       return status;
+}
+
 __be32
 nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
 {