Merge branch 'nfs-for-3.2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

* 'nfs-for-3.2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (25 commits)
  nfs: set vs_hidden on nfs4_callback_version4 (try #2)
  pnfs-obj: Support for RAID5 read-4-write interface.
  pnfs-obj: move to ore 03: Remove old raid engine
  pnfs-obj: move to ore 02: move to ORE
  pnfs-obj: move to ore 01: ore_layout & ore_components
  pnfs-obj: Rename objlayout_io_state => objlayout_io_res
  pnfs-obj: Get rid of objlayout_{alloc,free}_io_state
  pnfs-obj: Return PNFS_NOT_ATTEMPTED in case of read/write_pagelist
  pnfs-obj: Remove redundant EOF from objlayout_io_state
  nfs: Remove unused variable from write.c
  nfs: Fix unused variable warning from file.c
  NFS: Remove no-op less-than-zero checks on unsigned variables.
  NFS: Clean up nfs4_xdr_dec_secinfo()
  NFS: Fix documenting comment for nfs_create_request()
  NFS4: fix cb_recallany decode error
  nfs4: serialize layoutcommit
  SUNRPC: remove rpcbind clients destruction on module cleanup
  SUNRPC: remove rpcbind clients creation during service registering
  NFSd: call svc rpcbind cleanup explicitly
  SUNRPC: cleanup service destruction
  ...

4 files changed, 106 insertions, 36 deletions

diff --git a/net/sunrpc/auth_unix.c b/net/sunrpc/auth_unix.c
index 4cb70dc6e7a..e50502d8ceb 100644
--- a/net/sunrpc/auth_unix.c
+++ b/net/sunrpc/auth_unix.c
@@ -129,6 +129,9 @@ unx_match(struct auth_cred *acred, struct rpc_cred *rcred, int flags)
 	for (i = 0; i < groups ; i++)
 		if (cred->uc_gids[i] != GROUP_AT(acred->group_info, i))
 			return 0;
+	if (groups < NFS_NGROUPS &&
+	    cred->uc_gids[groups] != NOGROUP)
+		return 0;
 	return 1;
 }
 
diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c
index f588b852d41..8761bf8e36f 100644
--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -114,6 +114,9 @@ static struct rpc_program	rpcb_program;
 static struct rpc_clnt *	rpcb_local_clnt;
 static struct rpc_clnt *	rpcb_local_clnt4;
 
+DEFINE_SPINLOCK(rpcb_clnt_lock);
+unsigned int			rpcb_users;
+
 struct rpcbind_args {
 	struct rpc_xprt *	r_xprt;
 
@@ -161,6 +164,56 @@ static void rpcb_map_release(void *data)
 	kfree(map);
 }
 
+static int rpcb_get_local(void)
+{
+	int cnt;
+
+	spin_lock(&rpcb_clnt_lock);
+	if (rpcb_users)
+		rpcb_users++;
+	cnt = rpcb_users;
+	spin_unlock(&rpcb_clnt_lock);
+
+	return cnt;
+}
+
+void rpcb_put_local(void)
+{
+	struct rpc_clnt *clnt = rpcb_local_clnt;
+	struct rpc_clnt *clnt4 = rpcb_local_clnt4;
+	int shutdown;
+
+	spin_lock(&rpcb_clnt_lock);
+	if (--rpcb_users == 0) {
+		rpcb_local_clnt = NULL;
+		rpcb_local_clnt4 = NULL;
+	}
+	shutdown = !rpcb_users;
+	spin_unlock(&rpcb_clnt_lock);
+
+	if (shutdown) {
+		/*
+		 * cleanup_rpcb_clnt - remove xprtsock's sysctls, unregister
+		 */
+		if (clnt4)
+			rpc_shutdown_client(clnt4);
+		if (clnt)
+			rpc_shutdown_client(clnt);
+	}
+}
+
+static void rpcb_set_local(struct rpc_clnt *clnt, struct rpc_clnt *clnt4)
+{
+	/* Protected by rpcb_create_local_mutex */
+	rpcb_local_clnt = clnt;
+	rpcb_local_clnt4 = clnt4;
+	smp_wmb(); 
+	rpcb_users = 1;
+	dprintk("RPC:       created new rpcb local clients (rpcb_local_clnt: "
+			"%p, rpcb_local_clnt4: %p)\n", rpcb_local_clnt,
+			rpcb_local_clnt4);
+}
+
 /*
  * Returns zero on success, otherwise a negative errno value
  * is returned.
@@ -205,9 +258,7 @@ static int rpcb_create_local_unix(void)
 		clnt4 = NULL;
 	}
 
-	/* Protected by rpcb_create_local_mutex */
-	rpcb_local_clnt = clnt;
-	rpcb_local_clnt4 = clnt4;
+	rpcb_set_local(clnt, clnt4);
 
 out:
 	return result;
@@ -259,9 +310,7 @@ static int rpcb_create_local_net(void)
 		clnt4 = NULL;
 	}
 
-	/* Protected by rpcb_create_local_mutex */
-	rpcb_local_clnt = clnt;
-	rpcb_local_clnt4 = clnt4;
+	rpcb_set_local(clnt, clnt4);
 
 out:
 	return result;
@@ -271,16 +320,16 @@ out:
  * Returns zero on success, otherwise a negative errno value
  * is returned.
  */
-static int rpcb_create_local(void)
+int rpcb_create_local(void)
 {
 	static DEFINE_MUTEX(rpcb_create_local_mutex);
 	int result = 0;
 
-	if (rpcb_local_clnt)
+	if (rpcb_get_local())
 		return result;
 
 	mutex_lock(&rpcb_create_local_mutex);
-	if (rpcb_local_clnt)
+	if (rpcb_get_local())
 		goto out;
 
 	if (rpcb_create_local_unix() != 0)
@@ -382,11 +431,6 @@ int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port)
 	struct rpc_message msg = {
 		.rpc_argp	= &map,
 	};
-	int error;
-
-	error = rpcb_create_local();
-	if (error)
-		return error;
 
 	dprintk("RPC:       %sregistering (%u, %u, %d, %u) with local "
 			"rpcbind\n", (port ? "" : "un"),
@@ -522,11 +566,7 @@ int rpcb_v4_register(const u32 program, const u32 version,
 	struct rpc_message msg = {
 		.rpc_argp	= &map,
 	};
-	int error;
 
-	error = rpcb_create_local();
-	if (error)
-		return error;
 	if (rpcb_local_clnt4 == NULL)
 		return -EPROTONOSUPPORT;
 
@@ -1060,15 +1100,3 @@ static struct rpc_program rpcb_program = {
 	.version	= rpcb_version,
 	.stats		= &rpcb_stats,
 };
-
-/**
- * cleanup_rpcb_clnt - remove xprtsock's sysctls, unregister
- *
- */
-void cleanup_rpcb_clnt(void)
-{
-	if (rpcb_local_clnt4)
-		rpc_shutdown_client(rpcb_local_clnt4);
-	if (rpcb_local_clnt)
-		rpc_shutdown_client(rpcb_local_clnt);
-}
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index 9d080916099..8ec9778c3f4 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -61,8 +61,6 @@ static struct pernet_operations sunrpc_net_ops = {
 
 extern struct cache_detail unix_gid_cache;
 
-extern void cleanup_rpcb_clnt(void);
-
 static int __init
 init_sunrpc(void)
 {
@@ -102,7 +100,6 @@ out:
 static void __exit
 cleanup_sunrpc(void)
 {
-	cleanup_rpcb_clnt();
 	rpcauth_remove_module();
 	cleanup_socket_xprt();
 	svc_cleanup_xprt_sock();
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index dd5cc00ed55..6e038884ae0 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -366,6 +366,42 @@ svc_pool_for_cpu(struct svc_serv *serv, int cpu)
 	return &serv->sv_pools[pidx % serv->sv_nrpools];
 }
 
+static int svc_rpcb_setup(struct svc_serv *serv)
+{
+	int err;
+
+	err = rpcb_create_local();
+	if (err)
+		return err;
+
+	/* Remove any stale portmap registrations */
+	svc_unregister(serv);
+	return 0;
+}
+
+void svc_rpcb_cleanup(struct svc_serv *serv)
+{
+	svc_unregister(serv);
+	rpcb_put_local();
+}
+EXPORT_SYMBOL_GPL(svc_rpcb_cleanup);
+
+static int svc_uses_rpcbind(struct svc_serv *serv)
+{
+	struct svc_program	*progp;
+	unsigned int		i;
+
+	for (progp = serv->sv_program; progp; progp = progp->pg_next) {
+		for (i = 0; i < progp->pg_nvers; i++) {
+			if (progp->pg_vers[i] == NULL)
+				continue;
+			if (progp->pg_vers[i]->vs_hidden == 0)
+				return 1;
+		}
+	}
+
+	return 0;
+}
 
 /*
  * Create an RPC service
@@ -431,8 +467,15 @@ __svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
 		spin_lock_init(&pool->sp_lock);
 	}
 
-	/* Remove any stale portmap registrations */
-	svc_unregister(serv);
+	if (svc_uses_rpcbind(serv)) {
+	       	if (svc_rpcb_setup(serv) < 0) {
+			kfree(serv->sv_pools);
+			kfree(serv);
+			return NULL;
+		}
+		if (!serv->sv_shutdown)
+			serv->sv_shutdown = svc_rpcb_cleanup;
+	}
 
 	return serv;
 }
@@ -500,7 +543,6 @@ svc_destroy(struct svc_serv *serv)
 	if (svc_serv_is_pooled(serv))
 		svc_pool_map_put();
 
-	svc_unregister(serv);
 	kfree(serv->sv_pools);
 	kfree(serv);
 }