ocfs2: Move the call of ocfs2_hb_ctl into the stack glue.

Take o2hb_stop() out of the o2cb code and make it part of the generic
stack glue as ocfs2_leave_group().  This also allows us to remove the
ocfs2_get_hb_ctl_path() function - everything to do with hb_ctl is now
part of stackglue.c.  o2cb no longer needs a ->hangup() function.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

diff --git a/fs/ocfs2/stack_o2cb.c b/fs/ocfs2/stack_o2cb.c
index fb26a7c69c4747075b3bb4ff3c7c76df25e9728c..765ade5ee84a52bd32fff9ef6d6db7618d6b5468 100644 (file)
--- a/fs/ocfs2/stack_o2cb.c
+++ b/fs/ocfs2/stack_o2cb.c
@@ -333,43 +333,6 @@ static int o2cb_cluster_disconnect(struct ocfs2_cluster_connection *conn,
        return 0;
 }
 
-static void o2hb_stop(const char *group)
-{
-       int ret;
-       char *argv[5], *envp[3];
-
-       argv[0] = (char *)ocfs2_get_hb_ctl_path();
-       argv[1] = "-K";
-       argv[2] = "-u";
-       argv[3] = (char *)group;
-       argv[4] = NULL;
-
-       mlog(0, "Run: %s %s %s %s\n", argv[0], argv[1], argv[2], argv[3]);
-
-       /* minimal command environment taken from cpu_run_sbin_hotplug */
-       envp[0] = "HOME=/";
-       envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
-       envp[2] = NULL;
-
-       ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
-       if (ret < 0)
-               mlog_errno(ret);
-}
-
-/*
- * Hangup is a hack for tools compatibility.  Older ocfs2-tools software
- * expects the filesystem to call "ocfs2_hb_ctl" during unmount.  This
- * happens regardless of whether the DLM got started, so we can't do it
- * in ocfs2_cluster_disconnect().  We bring the o2hb_stop() function into
- * the glue and provide a "hangup" API for super.c to call.
- *
- * Other stacks will eventually provide a NULL ->hangup() pointer.
- */
-static void o2cb_cluster_hangup(const char *group, int grouplen)
-{
-       o2hb_stop(group);
-}
-
 static int o2cb_cluster_this_node(unsigned int *node)
 {
        int node_num;
@@ -388,7 +351,6 @@ static int o2cb_cluster_this_node(unsigned int *node)
 static struct ocfs2_stack_operations o2cb_stack_ops = {
        .connect        = o2cb_cluster_connect,
        .disconnect     = o2cb_cluster_disconnect,
-       .hangup         = o2cb_cluster_hangup,
        .this_node      = o2cb_cluster_this_node,
        .dlm_lock       = o2cb_dlm_lock,
        .dlm_unlock     = o2cb_dlm_unlock,

diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c
index fb9b8e0db2602a73438f843d1628860e75e5ef28..5f78ff4c76c72d486576fcd190851a81de9e52c3 100644 (file)
--- a/fs/ocfs2/stackglue.c
+++ b/fs/ocfs2/stackglue.c
@@ -34,11 +34,13 @@
 
 #define OCFS2_STACK_PLUGIN_O2CB                "o2cb"
 #define OCFS2_STACK_PLUGIN_USER                "user"
+#define OCFS2_MAX_HB_CTL_PATH          256
 
 static struct ocfs2_locking_protocol *lproto;
 static DEFINE_SPINLOCK(ocfs2_stack_lock);
 static LIST_HEAD(ocfs2_stack_list);
 static char cluster_stack_name[OCFS2_STACK_LABEL_LEN + 1];
+static char ocfs2_hb_ctl_path[OCFS2_MAX_HB_CTL_PATH] = "/sbin/ocfs2_hb_ctl";
 
 /*
  * The stack currently in use.  If not null, active_stack->sp_count > 0,
@@ -363,6 +365,42 @@ int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn,
 }
 EXPORT_SYMBOL_GPL(ocfs2_cluster_disconnect);
 
+/*
+ * Leave the group for this filesystem.  This is executed by a userspace
+ * program (stored in ocfs2_hb_ctl_path).
+ */
+static void ocfs2_leave_group(const char *group)
+{
+       int ret;
+       char *argv[5], *envp[3];
+
+       argv[0] = ocfs2_hb_ctl_path;
+       argv[1] = "-K";
+       argv[2] = "-u";
+       argv[3] = (char *)group;
+       argv[4] = NULL;
+
+       /* minimal command environment taken from cpu_run_sbin_hotplug */
+       envp[0] = "HOME=/";
+       envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
+       envp[2] = NULL;
+
+       ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
+       if (ret < 0) {
+               printk(KERN_ERR
+                      "ocfs2: Error %d running user helper "
+                      "\"%s %s %s %s\"\n",
+                      ret, argv[0], argv[1], argv[2], argv[3]);
+       }
+}
+
+/*
+ * Hangup is a required post-umount.  ocfs2-tools software expects the
+ * filesystem to call "ocfs2_hb_ctl" during unmount.  This happens
+ * regardless of whether the DLM got started, so we can't do it
+ * in ocfs2_cluster_disconnect().  The ocfs2_leave_group() function does
+ * the actual work.
+ */
 void ocfs2_cluster_hangup(const char *group, int grouplen)
 {
        BUG_ON(group == NULL);
@@ -371,6 +409,8 @@ void ocfs2_cluster_hangup(const char *group, int grouplen)
        if (active_stack->sp_ops->hangup)
                active_stack->sp_ops->hangup(group, grouplen);
 
+       ocfs2_leave_group(group);
+
        /* cluster_disconnect() was called with hangup_pending==1 */
        ocfs2_stack_driver_put();
 }
@@ -559,9 +599,6 @@ error:
 
 #define FS_OCFS2_NM            1
 
-#define OCFS2_MAX_HB_CTL_PATH 256
-static char ocfs2_hb_ctl_path[OCFS2_MAX_HB_CTL_PATH] = "/sbin/ocfs2_hb_ctl";
-
 static ctl_table ocfs2_nm_table[] = {
        {
                .ctl_name       = 1,
@@ -613,12 +650,6 @@ static ctl_table ocfs2_root_table[] = {
 
 static struct ctl_table_header *ocfs2_table_header = NULL;
 
-const char *ocfs2_get_hb_ctl_path(void)
-{
-       return ocfs2_hb_ctl_path;
-}
-EXPORT_SYMBOL_GPL(ocfs2_get_hb_ctl_path);
-
 
 /*
  * Initialization

diff --git a/fs/ocfs2/stackglue.h b/fs/ocfs2/stackglue.h
index c9fb01ab6347d65d8593ed37d3ae25bdac6d4b72..fe3fd2a12821d90feee16480af12b4989842e9a9 100644 (file)
--- a/fs/ocfs2/stackglue.h
+++ b/fs/ocfs2/stackglue.h
@@ -258,6 +258,5 @@ void ocfs2_stack_glue_set_locking_protocol(struct ocfs2_locking_protocol *proto)
 /* Used by stack plugins */
 int ocfs2_stack_glue_register(struct ocfs2_stack_plugin *plugin);
 void ocfs2_stack_glue_unregister(struct ocfs2_stack_plugin *plugin);
-const char *ocfs2_get_hb_ctl_path(void);
 
 #endif  /* STACKGLUE_H */