fs: dlm: add midcomms init/start functions

This patch introduces leftovers of init, start, stop and exit
functionality. The dlm application layer should always call the midcomms
layer which getting aware of such event and redirect it to the lowcomms
layer. Some functionality which is currently handled inside the start
functionality of midcomms and lowcomms should be handled in the init
functionality as it only need to be initialized once when dlm is loaded.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>

6 files changed, 37 insertions, 12 deletions

diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index 96fe8f7ca09cd..d0b4e2181a5f3 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -17,7 +17,6 @@
 #include "recoverd.h"
 #include "dir.h"
 #include "midcomms.h"
-#include "lowcomms.h"
 #include "config.h"
 #include "memory.h"
 #include "lock.h"
@@ -723,7 +722,7 @@ static int __dlm_new_lockspace(const char *name, const char *cluster,
 	if (!ls_count) {
 		dlm_scand_stop();
 		dlm_midcomms_shutdown();
-		dlm_lowcomms_stop();
+		dlm_midcomms_stop();
 	}
  out:
 	mutex_unlock(&ls_lock);
@@ -926,7 +925,7 @@ int dlm_release_lockspace(void *lockspace, int force)
 	if (!error)
 		ls_count--;
 	if (!ls_count)
-		dlm_lowcomms_stop();
+		dlm_midcomms_stop();
 	mutex_unlock(&ls_lock);
 
 	return error;
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index b05c6d9b5102c..0dcb69cc456a8 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1987,10 +1987,6 @@ static const struct dlm_proto_ops dlm_sctp_ops = {
 int dlm_lowcomms_start(void)
 {
 	int error = -EINVAL;
-	int i;
-
-	for (i = 0; i < CONN_HASH_SIZE; i++)
-		INIT_HLIST_HEAD(&connection_hash[i]);
 
 	init_local();
 	if (!dlm_local_count) {
@@ -1999,8 +1995,6 @@ int dlm_lowcomms_start(void)
 		goto fail;
 	}
 
-	INIT_WORK(&listen_con.rwork, process_listen_recv_socket);
-
 	error = work_start();
 	if (error)
 		goto fail_local;
@@ -2039,6 +2033,16 @@ fail:
 	return error;
 }
 
+void dlm_lowcomms_init(void)
+{
+	int i;
+
+	for (i = 0; i < CONN_HASH_SIZE; i++)
+		INIT_HLIST_HEAD(&connection_hash[i]);
+
+	INIT_WORK(&listen_con.rwork, process_listen_recv_socket);
+}
+
 void dlm_lowcomms_exit(void)
 {
 	struct dlm_node_addr *na, *safe;
diff --git a/fs/dlm/lowcomms.h b/fs/dlm/lowcomms.h
index 29369feea9916..bbce7a18416dc 100644
--- a/fs/dlm/lowcomms.h
+++ b/fs/dlm/lowcomms.h
@@ -35,6 +35,7 @@ extern int dlm_allow_conn;
 int dlm_lowcomms_start(void);
 void dlm_lowcomms_shutdown(void);
 void dlm_lowcomms_stop(void);
+void dlm_lowcomms_init(void);
 void dlm_lowcomms_exit(void);
 int dlm_lowcomms_close(int nodeid);
 struct dlm_msg *dlm_lowcomms_new_msg(int nodeid, int len, gfp_t allocation,
diff --git a/fs/dlm/main.c b/fs/dlm/main.c
index 1c5be4b70ac1b..a77338be32371 100644
--- a/fs/dlm/main.c
+++ b/fs/dlm/main.c
@@ -17,7 +17,7 @@
 #include "user.h"
 #include "memory.h"
 #include "config.h"
-#include "lowcomms.h"
+#include "midcomms.h"
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/dlm.h>
@@ -30,6 +30,8 @@ static int __init init_dlm(void)
 	if (error)
 		goto out;
 
+	dlm_midcomms_init();
+
 	error = dlm_lockspace_init();
 	if (error)
 		goto out_mem;
@@ -66,6 +68,7 @@ static int __init init_dlm(void)
  out_lockspace:
 	dlm_lockspace_exit();
  out_mem:
+	dlm_midcomms_exit();
 	dlm_memory_exit();
  out:
 	return error;
@@ -79,7 +82,7 @@ static void __exit exit_dlm(void)
 	dlm_config_exit();
 	dlm_memory_exit();
 	dlm_lockspace_exit();
-	dlm_lowcomms_exit();
+	dlm_midcomms_exit();
 	dlm_unregister_debugfs();
 }
 
diff --git a/fs/dlm/midcomms.c b/fs/dlm/midcomms.c
index 960def5ab5304..6b4c72fb01710 100644
--- a/fs/dlm/midcomms.c
+++ b/fs/dlm/midcomms.c
@@ -1206,12 +1206,27 @@ void dlm_midcomms_commit_mhandle(struct dlm_mhandle *mh,
 
 int dlm_midcomms_start(void)
 {
+	return dlm_lowcomms_start();
+}
+
+void dlm_midcomms_stop(void)
+{
+	dlm_lowcomms_stop();
+}
+
+void dlm_midcomms_init(void)
+{
 	int i;
 
 	for (i = 0; i < CONN_HASH_SIZE; i++)
 		INIT_HLIST_HEAD(&node_hash[i]);
 
-	return dlm_lowcomms_start();
+	dlm_lowcomms_init();
+}
+
+void dlm_midcomms_exit(void)
+{
+	dlm_lowcomms_exit();
 }
 
 static void dlm_act_fin_ack_rcv(struct midcomms_node *node)
diff --git a/fs/dlm/midcomms.h b/fs/dlm/midcomms.h
index d6286e80b077a..69296552d5add 100644
--- a/fs/dlm/midcomms.h
+++ b/fs/dlm/midcomms.h
@@ -21,6 +21,9 @@ void dlm_midcomms_commit_mhandle(struct dlm_mhandle *mh, const void *name,
 				 int namelen);
 int dlm_midcomms_close(int nodeid);
 int dlm_midcomms_start(void);
+void dlm_midcomms_stop(void);
+void dlm_midcomms_init(void);
+void dlm_midcomms_exit(void);
 void dlm_midcomms_shutdown(void);
 void dlm_midcomms_add_member(int nodeid);
 void dlm_midcomms_remove_member(int nodeid);