nfsd4: don't sleep in lease-break callback

[safe/jmp/linux-2.6] / fs / nfsd / nfs4state.c

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 5051ade..adc51d1 100644 (file)
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -198,6 +198,7 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f
        atomic_set(&dp->dl_count, 1);
        list_add(&dp->dl_perfile, &fp->fi_delegations);
        list_add(&dp->dl_perclnt, &clp->cl_delegations);
+       INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc);
        return dp;
 }
 
@@ -679,21 +680,6 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name)
        return clp;
 }
 
-static void
-shutdown_callback_client(struct nfs4_client *clp)
-{
-       struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client;
-
-       if (clnt) {
-               /*
-                * Callback threads take a reference on the client, so there
-                * should be no outstanding callbacks at this point.
-                */
-               clp->cl_cb_conn.cb_client = NULL;
-               rpc_shutdown_client(clnt);
-       }
-}
-
 static inline void
 free_client(struct nfs4_client *clp)
 {
@@ -746,7 +732,7 @@ expire_client(struct nfs4_client *clp)
                                 se_perclnt);
                release_session(ses);
        }
-       shutdown_callback_client(clp);
+       nfsd4_set_callback_client(clp, NULL);
        if (clp->cl_cb_xprt)
                svc_xprt_put(clp->cl_cb_xprt);
        put_nfs4_client(clp);
@@ -1392,7 +1378,7 @@ nfsd4_destroy_session(struct svc_rqst *r,
        spin_unlock(&sessionid_lock);
 
        /* wait for callbacks */
-       shutdown_callback_client(ses->se_client);
+       nfsd4_set_callback_client(ses->se_client, NULL);
        nfsd4_put_session(ses);
        status = nfs_ok;
 out:
@@ -4004,16 +3990,27 @@ set_max_delegations(void)
 static int
 __nfs4_state_start(void)
 {
+       int ret;
+
        boot_time = get_seconds();
        locks_start_grace(&nfsd4_manager);
        printk(KERN_INFO "NFSD: starting %ld-second grace period\n",
               nfsd4_grace);
+       ret = set_callback_cred();
+       if (ret)
+               return -ENOMEM;
        laundry_wq = create_singlethread_workqueue("nfsd4");
        if (laundry_wq == NULL)
                return -ENOMEM;
+       ret = nfsd4_create_callback_queue();
+       if (ret)
+               goto out_free_laundry;
        queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ);
        set_max_delegations();
-       return set_callback_cred();
+       return 0;
+out_free_laundry:
+       destroy_workqueue(laundry_wq);
+       return ret;
 }
 
 int
@@ -4075,6 +4072,7 @@ nfs4_state_shutdown(void)
        nfs4_lock_state();
        nfs4_release_reclaim();
        __nfs4_state_shutdown();
+       nfsd4_destroy_callback_queue();
        nfs4_unlock_state();
 }