NFSv4: Rename the state reclaimer thread

It is really a more general purpose state management thread at this point.

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

4 files changed, 32 insertions, 25 deletions

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index ff2c1585d23f..4692fdc8abf3 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -360,7 +360,7 @@ static int nfs_do_expire_all_delegations(void *ptr)
 
         allow_signal(SIGKILL);
 
-        if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) != 0)
+        if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0)
                 goto out;
         if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0)
                 goto out;
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 84a4f5223f61..b7a12e7c6604 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -38,7 +38,7 @@ struct idmap;
  ((err) != NFSERR_NOFILEHANDLE))
 
 enum nfs4_client_state {
-        NFS4CLNT_STATE_RECOVER  = 0,
+        NFS4CLNT_MANAGER_RUNNING  = 0,
         NFS4CLNT_CHECK_LEASE,
         NFS4CLNT_LEASE_EXPIRED,
         NFS4CLNT_RECLAIM_REBOOT,
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 8a2dee9caa6e..2a347d47e38c 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -207,7 +207,7 @@ static int nfs4_wait_clnt_recover(struct nfs_client *clp)
 
         might_sleep();
 
-        res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
+        res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
                         nfs4_wait_bit_killable, TASK_KILLABLE);
         return res;
 }
@@ -2861,7 +2861,7 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
                 case -NFS4ERR_EXPIRED:
                         rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
                         nfs4_schedule_state_recovery(clp);
-                        if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
+                        if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
                                 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
                         task->tk_status = 0;
                         return -EAGAIN;
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 2894502b94dc..83f3dd39ac55 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -767,32 +767,34 @@ unlock:
         return status;
 }
 
-static int reclaimer(void *);
+static int nfs4_run_state_manager(void *);
 
-static inline void nfs4_clear_recover_bit(struct nfs_client *clp)
+static void nfs4_clear_state_manager_bit(struct nfs_client *clp)
 {
         smp_mb__before_clear_bit();
-        clear_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state);
+        clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state);
         smp_mb__after_clear_bit();
-        wake_up_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER);
+        wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING);
         rpc_wake_up(&clp->cl_rpcwaitq);
 }
 
 /*
- * State recovery routine
+ * Schedule the nfs_client asynchronous state management routine
  */
-static void nfs4_recover_state(struct nfs_client *clp)
+static void nfs4_schedule_state_manager(struct nfs_client *clp)
 {
         struct task_struct *task;
 
+        if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0)
+                return;
         __module_get(THIS_MODULE);
         atomic_inc(&clp->cl_count);
-        task = kthread_run(reclaimer, clp, "%s-reclaim",
+        task = kthread_run(nfs4_run_state_manager, clp, "%s-manager",
                                 rpc_peeraddr2str(clp->cl_rpcclient,
                                                         RPC_DISPLAY_ADDR));
         if (!IS_ERR(task))
                 return;
-        nfs4_clear_recover_bit(clp);
+        nfs4_clear_state_manager_bit(clp);
         nfs_put_client(clp);
         module_put(THIS_MODULE);
 }
@@ -806,8 +808,7 @@ void nfs4_schedule_state_recovery(struct nfs_client *clp)
                 return;
         if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
                 set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state);
-        if (test_and_set_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
-                nfs4_recover_state(clp);
+        nfs4_schedule_state_manager(clp);
 }
 
 static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state)
@@ -1106,13 +1107,10 @@ static int nfs4_reclaim_lease(struct nfs_client *clp)
         return status;
 }
 
-static int reclaimer(void *ptr)
+static void nfs4_state_manager(struct nfs_client *clp)
 {
-        struct nfs_client *clp = ptr;
         int status = 0;
 
-        allow_signal(SIGKILL);
-
         /* Ensure exclusive access to NFSv4 state */
         while (!list_empty(&clp->cl_superblocks)) {
                 if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) {
@@ -1161,19 +1159,28 @@ static int reclaimer(void *ptr)
                         nfs_client_return_marked_delegations(clp);
                         continue;
                 }
+
+                nfs4_clear_state_manager_bit(clp);
                 break;
         }
-out:
-        nfs4_clear_recover_bit(clp);
-        nfs_put_client(clp);
-        module_put_and_exit(0);
-        return 0;
+        return;
 out_error:
-        printk(KERN_WARNING "Error: state recovery failed on NFSv4 server %s"
+        printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s"
                         " with error %d\n", clp->cl_hostname, -status);
         if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state))
                 nfs4_state_end_reclaim_reboot(clp);
-        goto out;
+        nfs4_clear_state_manager_bit(clp);
+}
+
+static int nfs4_run_state_manager(void *ptr)
+{
+        struct nfs_client *clp = ptr;
+
+        allow_signal(SIGKILL);
+        nfs4_state_manager(clp);
+        nfs_put_client(clp);
+        module_put_and_exit(0);
+        return 0;
 }
 
 /*