NFSv4: Clean up nfs_expire_all_delegations()

Let the actual delegreturn stuff be run in the state manager thread rather
than allocating a separate kthread.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

4 files changed, 16 insertions, 34 deletions

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 4692fdc8abf3..21eda6c083d0 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -354,37 +354,16 @@ static void nfs_client_mark_return_all_delegations(struct nfs_client *clp)
         rcu_read_unlock();
 }
 
-static int nfs_do_expire_all_delegations(void *ptr)
+static void nfs_delegation_run_state_manager(struct nfs_client *clp)
 {
-        struct nfs_client *clp = ptr;
-
-        allow_signal(SIGKILL);
-
-        if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0)
-                goto out;
-        if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0)
-                goto out;
-        nfs_client_mark_return_all_delegations(clp);
-        nfs_client_return_marked_delegations(clp);
-out:
-        nfs_put_client(clp);
-        module_put_and_exit(0);
+        if (test_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state))
+                nfs4_schedule_state_manager(clp);
 }
 
 void nfs_expire_all_delegations(struct nfs_client *clp)
 {
-        struct task_struct *task;
-
-        __module_get(THIS_MODULE);
-        atomic_inc(&clp->cl_count);
-        task = kthread_run(nfs_do_expire_all_delegations, clp,
-                                "%s-delegreturn",
-                                rpc_peeraddr2str(clp->cl_rpcclient,
-                                                        RPC_DISPLAY_ADDR));
-        if (!IS_ERR(task))
-                return;
-        nfs_put_client(clp);
-        module_put(THIS_MODULE);
+        nfs_client_mark_return_all_delegations(clp);
+        nfs_delegation_run_state_manager(clp);
 }
 
 /*
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index b7a12e7c6604..ee5f51ef696d 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -227,6 +227,7 @@ extern void nfs4_close_state(struct path *, struct nfs4_state *, mode_t);
 extern void nfs4_close_sync(struct path *, struct nfs4_state *, mode_t);
 extern void nfs4_state_set_mode_locked(struct nfs4_state *, mode_t);
 extern void nfs4_schedule_state_recovery(struct nfs_client *);
+extern void nfs4_schedule_state_manager(struct nfs_client *);
 extern int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state);
 extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
 extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
diff --git a/fs/nfs/nfs4renewd.c b/fs/nfs/nfs4renewd.c
index 6101f955f231..ca557e677d9e 100644
--- a/fs/nfs/nfs4renewd.c
+++ b/fs/nfs/nfs4renewd.c
@@ -77,16 +77,18 @@ nfs4_renew_state(struct work_struct *work)
         /* Are we close to a lease timeout? */
         if (time_after(now, last + lease/3)) {
                 cred = nfs4_get_renew_cred_locked(clp);
+                spin_unlock(&clp->cl_lock);
                 if (cred == NULL) {
-                        set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
-                        spin_unlock(&clp->cl_lock);
+                        if (list_empty(&clp->cl_delegations)) {
+                                set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
+                                goto out;
+                        }
                         nfs_expire_all_delegations(clp);
-                        goto out;
+                } else {
+                        /* Queue an asynchronous RENEW. */
+                        nfs4_proc_async_renew(clp, cred);
+                        put_rpccred(cred);
                 }
-                spin_unlock(&clp->cl_lock);
-                /* Queue an asynchronous RENEW. */
-                nfs4_proc_async_renew(clp, cred);
-                put_rpccred(cred);
                 timeout = (2 * lease) / 3;
                 spin_lock(&clp->cl_lock);
         } else
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 6dc36a0d9a85..cd16b301f13c 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -781,7 +781,7 @@ static void nfs4_clear_state_manager_bit(struct nfs_client *clp)
 /*
  * Schedule the nfs_client asynchronous state management routine
  */
-static void nfs4_schedule_state_manager(struct nfs_client *clp)
+void nfs4_schedule_state_manager(struct nfs_client *clp)
 {
         struct task_struct *task;