This patch is used to get rid of ocfs2_is_o2cb_active() function,
Why? First, we had the similar functions to identify which cluster
stack is being used via osb->osb_cluster_stack. Second, the current
implementation of ocfs2_is_o2cb_active() function is not total safe,
base on the design of stackglue, we need to get ocfs2_stack_lock lock
before using ocfs2_stack related data structures, and that
active_stack pointer can be NULL in case mount failure.
Signed-off-by: Gang He <g...@suse.com>
---
fs/ocfs2/dlmglue.c | 2 +-
fs/ocfs2/stackglue.c | 6 ------
fs/ocfs2/stackglue.h | 3 ---
3 files changed, 1 insertion(+), 10 deletions(-)
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 3b7c937..a54196a 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -3409,7 +3409,7 @@ static int ocfs2_downconvert_lock(struct ocfs2_super *osb,
* we can recover correctly from node failure. Otherwise, we may get
* invalid LVB in LKB, but without DLM_SBF_VALNOTVALID being set.
*/
- if (!ocfs2_is_o2cb_active() &&
+ if (ocfs2_userspace_stack(osb) &&
lockres->l_ops->flags & LOCK_TYPE_USES_LVB)
lvb = 1;
diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c
index 8203590..52c07346b 100644
--- a/fs/ocfs2/stackglue.c
+++ b/fs/ocfs2/stackglue.c
@@ -48,12 +48,6 @@
*/
static struct ocfs2_stack_plugin *active_stack;
-inline int ocfs2_is_o2cb_active(void)
-{
- return !strcmp(active_stack->sp_name, OCFS2_STACK_PLUGIN_O2CB);
-}
-EXPORT_SYMBOL_GPL(ocfs2_is_o2cb_active);
-
static struct ocfs2_stack_plugin *ocfs2_stack_lookup(const char *name)
{
struct ocfs2_stack_plugin *p;
diff --git a/fs/ocfs2/stackglue.h b/fs/ocfs2/stackglue.h
index e3036e1..f2dce10 100644
--- a/fs/ocfs2/stackglue.h
+++ b/fs/ocfs2/stackglue.h
@@ -298,9 +298,6 @@ int ocfs2_plock(struct ocfs2_cluster_connection *conn, u64
ino,
int ocfs2_stack_glue_register(struct ocfs2_stack_plugin *plugin);
void ocfs2_stack_glue_unregister(struct ocfs2_stack_plugin *plugin);
-/* In ocfs2_downconvert_lock(), we need to know which stack we are using */
-int ocfs2_is_o2cb_active(void);
-
extern struct kset *ocfs2_kset;
#endif /* STACKGLUE_H */
--
1.8.5.6
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