NFSv4.1: Add DESTROY_CLIENTID
Ensure that we destroy our lease on last unmount
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 3fdff0c..485a6c0 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -5261,6 +5261,65 @@
return status;
}
+static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
+ struct rpc_cred *cred)
+{
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
+ .rpc_argp = clp,
+ .rpc_cred = cred,
+ };
+ int status;
+
+ status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
+ if (status)
+ pr_warn("NFS: Got error %d from the server %s on "
+ "DESTROY_CLIENTID.", status, clp->cl_hostname);
+ return status;
+}
+
+static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
+ struct rpc_cred *cred)
+{
+ unsigned int loop;
+ int ret;
+
+ for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
+ ret = _nfs4_proc_destroy_clientid(clp, cred);
+ switch (ret) {
+ case -NFS4ERR_DELAY:
+ case -NFS4ERR_CLIENTID_BUSY:
+ ssleep(1);
+ break;
+ default:
+ return ret;
+ }
+ }
+ return 0;
+}
+
+int nfs4_destroy_clientid(struct nfs_client *clp)
+{
+ struct rpc_cred *cred;
+ int ret = 0;
+
+ if (clp->cl_mvops->minor_version < 1)
+ goto out;
+ if (clp->cl_exchange_flags == 0)
+ goto out;
+ cred = nfs4_get_exchange_id_cred(clp);
+ ret = nfs4_proc_destroy_clientid(clp, cred);
+ if (cred)
+ put_rpccred(cred);
+ switch (ret) {
+ case 0:
+ case -NFS4ERR_STALE_CLIENTID:
+ clp->cl_exchange_flags = 0;
+ }
+out:
+ return ret;
+}
+
struct nfs4_get_lease_time_data {
struct nfs4_get_lease_time_args *args;
struct nfs4_get_lease_time_res *res;