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ocfs2: live heartbeat depends on the local node configuration 

Removing the local node configuration out from underneath a running
heartbeat is "bad".  Provide an API in the ocfs2 nodemanager to request
a configfs dependancy on the local node, then use it in heartbeat.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Joel Becker 2007-06-19 11:34:03 -07:00 committed by Mark Fasheh
parent 14829422be
commit 16c6a4f24d
3 changed files with 46 additions and 3 deletions
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17
fs/ocfs2/cluster/heartbeat.c
View File

@ -1693,9 +1693,18 @@ static int o2hb_region_get(const char *region_uuid)
ret = -ENOENT;
spin_unlock(&o2hb_live_lock);
if (!ret)
ret = o2nm_depend_item(&reg->hr_item);
if (ret)
goto out;
ret = o2nm_depend_this_node();
if (ret)
goto out;
ret = o2nm_depend_item(&reg->hr_item);
if (ret)
o2nm_undepend_this_node();
out:
return ret;
}
@ -1709,8 +1718,10 @@ static void o2hb_region_put(const char *region_uuid)
spin_unlock(&o2hb_live_lock);
if (reg)
if (reg) {
o2nm_undepend_item(&reg->hr_item);
o2nm_undepend_this_node();
}
}
int o2hb_register_callback(const char *region_uuid,

30
fs/ocfs2/cluster/nodemanager.c
View File

@ -910,6 +910,36 @@ void o2nm_undepend_item(struct config_item *item)
configfs_undepend_item(&o2nm_cluster_group.cs_subsys, item);
}
int o2nm_depend_this_node(void)
{
int ret = 0;
struct o2nm_node *local_node;
local_node = o2nm_get_node_by_num(o2nm_this_node());
if (!local_node) {
ret = -EINVAL;
goto out;
}
ret = o2nm_depend_item(&local_node->nd_item);
o2nm_node_put(local_node);
out:
return ret;
}
void o2nm_undepend_this_node(void)
{
struct o2nm_node *local_node;
local_node = o2nm_get_node_by_num(o2nm_this_node());
BUG_ON(!local_node);
o2nm_undepend_item(&local_node->nd_item);
o2nm_node_put(local_node);
}
static void __exit exit_o2nm(void)
{
if (ocfs2_table_header)

2
fs/ocfs2/cluster/nodemanager.h
View File

@ -79,5 +79,7 @@ void o2nm_node_put(struct o2nm_node *node);
int o2nm_depend_item(struct config_item *item);
void o2nm_undepend_item(struct config_item *item);
int o2nm_depend_this_node(void);
void o2nm_undepend_this_node(void);
#endif /* O2CLUSTER_NODEMANAGER_H */