tipc: remove all enabled flags from all tipc components

When tipc module is inserted, many tipc components are initialized
one by one. During the initialization period, if one of them is
failed, tipc_core_stop() will be called to stop all components
whatever corresponding components are created or not. To avoid to
release uncreated ones, relevant components have to add necessary
enabled flags indicating whether they are created or not.

But in the initialization stage, if one component is unsuccessfully
created, we will just destroy successfully created components before
the failed component instead of all components. All enabled flags
defined in components, in turn, become redundant. Additionally it's
also unnecessary to identify whether table.types is NULL in
tipc_nametbl_stop() because name stable has been definitely created
successfully when tipc_nametbl_stop() is called.

Cc: Jon Maloy <jon.maloy@ericsson.com>
Cc: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/tipc/core.c b/net/tipc/core.c
index f9e88d8..cfd9cc1 100644 (file)
--- a/net/tipc/core.c
+++ b/net/tipc/core.c
@@ -122,30 +122,59 @@ static void tipc_core_stop(void)
  */
 static int tipc_core_start(void)
 {
-       int res;
+       int err;
 
        get_random_bytes(&tipc_random, sizeof(tipc_random));
 
-       res = tipc_handler_start();
-       if (!res)
-               res = tipc_ref_table_init(tipc_max_ports, tipc_random);
-       if (!res)
-               res = tipc_nametbl_init();
-       if (!res)
-               res = tipc_netlink_start();
-       if (!res)
-               res = tipc_socket_init();
-       if (!res)
-               res = tipc_register_sysctl();
-       if (!res)
-               res = tipc_subscr_start();
-       if (!res)
-               res = tipc_cfg_init();
-       if (res) {
-               tipc_handler_stop();
-               tipc_core_stop();
-       }
-       return res;
+       err = tipc_handler_start();
+       if (err)
+               goto out_handler;
+
+       err = tipc_ref_table_init(tipc_max_ports, tipc_random);
+       if (err)
+               goto out_reftbl;
+
+       err = tipc_nametbl_init();
+       if (err)
+               goto out_nametbl;
+
+       err = tipc_netlink_start();
+       if (err)
+               goto out_netlink;
+
+       err = tipc_socket_init();
+       if (err)
+               goto out_socket;
+
+       err = tipc_register_sysctl();
+       if (err)
+               goto out_sysctl;
+
+       err = tipc_subscr_start();
+       if (err)
+               goto out_subscr;
+
+       err = tipc_cfg_init();
+       if (err)
+               goto out_cfg;
+
+       return 0;
+out_cfg:
+       tipc_subscr_stop();
+out_subscr:
+       tipc_unregister_sysctl();
+out_sysctl:
+       tipc_socket_stop();
+out_socket:
+       tipc_netlink_stop();
+out_netlink:
+       tipc_nametbl_stop();
+out_nametbl:
+       tipc_ref_table_stop();
+out_reftbl:
+       tipc_handler_stop();
+out_handler:
+       return err;
 }
 
 static int __init tipc_init(void)

diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index 92a1533..48302be 100644 (file)
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -945,9 +945,6 @@ void tipc_nametbl_stop(void)
 {
        u32 i;
 
-       if (!table.types)
-               return;
-
        /* Verify name table is empty, then release it */
        write_lock_bh(&tipc_nametbl_lock);
        for (i = 0; i < TIPC_NAMETBL_SIZE; i++) {

diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
index 9f72a63..3aaf73d 100644 (file)
--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -83,8 +83,6 @@ static struct genl_ops tipc_genl_ops[] = {
        },
 };
 
-static int tipc_genl_family_registered;
-
 int tipc_netlink_start(void)
 {
        int res;
@@ -94,16 +92,10 @@ int tipc_netlink_start(void)
                pr_err("Failed to register netlink interface\n");
                return res;
        }
-
-       tipc_genl_family_registered = 1;
        return 0;
 }
 
 void tipc_netlink_stop(void)
 {
-       if (!tipc_genl_family_registered)
-               return;
-
        genl_unregister_family(&tipc_genl_family);
-       tipc_genl_family_registered = 0;
 }

diff --git a/net/tipc/ref.c b/net/tipc/ref.c
index 2a2a938..de3d593 100644 (file)
--- a/net/tipc/ref.c
+++ b/net/tipc/ref.c
@@ -126,9 +126,6 @@ int tipc_ref_table_init(u32 requested_size, u32 start)
  */
 void tipc_ref_table_stop(void)
 {
-       if (!tipc_ref_table.entries)
-               return;
-
        vfree(tipc_ref_table.entries);
        tipc_ref_table.entries = NULL;
 }

diff --git a/net/tipc/server.c b/net/tipc/server.c
index b635ca3..3739797 100644 (file)
--- a/net/tipc/server.c
+++ b/net/tipc/server.c
@@ -573,7 +573,6 @@ int tipc_server_start(struct tipc_server *s)
                kmem_cache_destroy(s->rcvbuf_cache);
                return ret;
        }
-       s->enabled = 1;
        return ret;
 }
 
@@ -583,10 +582,6 @@ void tipc_server_stop(struct tipc_server *s)
        int total = 0;
        int id;
 
-       if (!s->enabled)
-               return;
-
-       s->enabled = 0;
        spin_lock_bh(&s->idr_lock);
        for (id = 0; total < s->idr_in_use; id++) {
                con = idr_find(&s->conn_idr, id);

diff --git a/net/tipc/server.h b/net/tipc/server.h
index 98b23f2..be817b0 100644 (file)
--- a/net/tipc/server.h
+++ b/net/tipc/server.h
@@ -56,7 +56,6 @@
  * @name: server name
  * @imp: message importance
  * @type: socket type
- * @enabled: identify whether server is launched or not
  */
 struct tipc_server {
        struct idr conn_idr;
@@ -74,7 +73,6 @@ struct tipc_server {
        const char name[TIPC_SERVER_NAME_LEN];
        int imp;
        int type;
-       int enabled;
 };
 
 int tipc_conn_sendmsg(struct tipc_server *s, int conid,

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index aab4948..a4cf274 100644 (file)
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -70,8 +70,6 @@ static const struct proto_ops msg_ops;
 static struct proto tipc_proto;
 static struct proto tipc_proto_kern;
 
-static int sockets_enabled;
-
 /*
  * Revised TIPC socket locking policy:
  *
@@ -2027,8 +2025,6 @@ int tipc_socket_init(void)
                proto_unregister(&tipc_proto);
                goto out;
        }
-
-       sockets_enabled = 1;
  out:
        return res;
 }
@@ -2038,10 +2034,6 @@ int tipc_socket_init(void)
  */
 void tipc_socket_stop(void)
 {
-       if (!sockets_enabled)
-               return;
-
-       sockets_enabled = 0;
        sock_unregister(tipc_family_ops.family);
        proto_unregister(&tipc_proto);
 }