nfsd: simplify NFSv4 state init and shutdown

This patch moves nfsd_startup_generic() and nfsd_shutdown_generic()
calls to nfsd_startup_net() and nfsd_shutdown_net() respectively, which
allows us to call nfsd_startup_net() instead of nfsd_startup() and makes
the code look clearer.  It also modifies nfsd_svc() and nfsd_shutdown()
to check nn->nfsd_net_up instead of global nfsd_up.  The latter is now
used only for generic resources shutdown and is currently useless.  It
will replaced by NFSd users counter later in this series.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 15 insertions, 29 deletions

diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index f9d147f6dfd4..0c87b4e7d1b5 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -235,9 +235,10 @@ static void nfsd_shutdown_generic(void)
 {
         nfs4_state_shutdown();
         nfsd_racache_shutdown();
+        nfsd_up = false;
 }
 
-static int nfsd_startup_net(struct net *net)
+static int nfsd_startup_net(int nrservs, struct net *net)
 {
         struct nfsd_net *nn = net_generic(net, nfsd_net_id);
         int ret;
@@ -245,39 +246,26 @@ static int nfsd_startup_net(struct net *net)
         if (nn->nfsd_net_up)
                 return 0;
 
-        ret = nfsd_init_socks(net);
+        ret = nfsd_startup_generic(nrservs);
         if (ret)
                 return ret;
+        ret = nfsd_init_socks(net);
+        if (ret)
+                goto out_socks;
         ret = lockd_up(net);
         if (ret)
-                return ret;
+                goto out_socks;
         ret = nfs4_state_start_net(net);
         if (ret)
                 goto out_lockd;
 
         nn->nfsd_net_up = true;
+        nfsd_up = true;
         return 0;
 
 out_lockd:
         lockd_down(net);
-        return ret;
-}
-
-static int nfsd_startup(int nrservs, struct net *net)
-{
-        int ret;
-
-        ret = nfsd_startup_generic(nrservs);
-        if (ret)
-                return ret;
-        ret = nfsd_startup_net(net);
-        if (ret)
-                goto out_net;
-
-        nfsd_up = true;
-        return 0;
-
-out_net:
+out_socks:
         nfsd_shutdown_generic();
         return ret;
 }
@@ -286,27 +274,25 @@ static void nfsd_shutdown_net(struct net *net)
 {
         struct nfsd_net *nn = net_generic(net, nfsd_net_id);
 
-        if (!nn->nfsd_net_up)
-                return;
-
         nfs4_state_shutdown_net(net);
         lockd_down(net);
         nn->nfsd_net_up = false;
+        nfsd_shutdown_generic();
 }
 
 static void nfsd_shutdown(struct net *net)
 {
+        struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
         /*
          * write_ports can create the server without actually starting
          * any threads--if we get shut down before any threads are
          * started, then nfsd_last_thread will be run before any of this
          * other initialization has been done.
          */
-        if (!nfsd_up)
+        if (!nn->nfsd_net_up)
                 return;
         nfsd_shutdown_net(net);
-        nfsd_shutdown_generic();
-        nfsd_up = false;
 }
 
 static void nfsd_last_thread(struct svc_serv *serv, struct net *net)
@@ -528,9 +514,9 @@ nfsd_svc(int nrservs, struct net *net)
         if (error)
                 goto out;
 
-        nfsd_up_before = nfsd_up;
+        nfsd_up_before = nn->nfsd_net_up;
 
-        error = nfsd_startup(nrservs, net);
+        error = nfsd_startup_net(nrservs, net);
         if (error)
                 goto out_destroy;
         error = svc_set_num_threads(nn->nfsd_serv, NULL, nrservs);