The patch titled
Subject: ocfs2: remove ocfs2_is_o2cb_active()
has been added to the -mm tree. Its filename is
ocfs2-get-rid-of-ocfs2_is_o2cb_active-function.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ocfs2-get-rid-of-ocfs2_is_o2cb_active-function.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ocfs2-get-rid-of-ocfs2_is_o2cb_active-function.patch
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------------------------------------------------------
From: Gang He <ghe@xxxxxxxx>
Subject: ocfs2: remove ocfs2_is_o2cb_active()
Remove ocfs2_is_o2cb_active(). We have similar functions to identify
which cluster stack is being used via osb->osb_cluster_stack.
Secondly, the current implementation of ocfs2_is_o2cb_active() is not
totally safe. Based on the design of stackglue, we need to get
ocfs2_stack_lock before using ocfs2_stack related data structures, and
that active_stack pointer can be NULL in the case of mount failure.
Link: http://lkml.kernel.org/r/1495441079-11708-1-git-send-email-ghe@xxxxxxxx
Signed-off-by: Gang He <ghe@xxxxxxxx>
Cc: Mark Fasheh <mfasheh@xxxxxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Cc: Joseph Qi <jiangqi903@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/dlmglue.c | 2 +-
fs/ocfs2/stackglue.c | 6 ------
fs/ocfs2/stackglue.h | 3 ---
3 files changed, 1 insertion(+), 10 deletions(-)
diff -puN fs/ocfs2/dlmglue.c~ocfs2-get-rid-of-ocfs2_is_o2cb_active-function fs/ocfs2/dlmglue.c
--- a/fs/ocfs2/dlmglue.c~ocfs2-get-rid-of-ocfs2_is_o2cb_active-function
+++ a/fs/ocfs2/dlmglue.c
@@ -3409,7 +3409,7 @@ static int ocfs2_downconvert_lock(struct
* we can recover correctly from node failure. Otherwise, we may get
* invalid LVB in LKB, but without DLM_SBF_VALNOTVALIDÂ being set.
*/
- if (!ocfs2_is_o2cb_active() &&
+ if (ocfs2_userspace_stack(osb) &&
lockres->l_ops->flags & LOCK_TYPE_USES_LVB)
lvb = 1;
diff -puN fs/ocfs2/stackglue.c~ocfs2-get-rid-of-ocfs2_is_o2cb_active-function fs/ocfs2/stackglue.c
--- a/fs/ocfs2/stackglue.c~ocfs2-get-rid-of-ocfs2_is_o2cb_active-function
+++ a/fs/ocfs2/stackglue.c
@@ -48,12 +48,6 @@ static char ocfs2_hb_ctl_path[OCFS2_MAX_
*/
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 -puN fs/ocfs2/stackglue.h~ocfs2-get-rid-of-ocfs2_is_o2cb_active-function fs/ocfs2/stackglue.h
--- a/fs/ocfs2/stackglue.h~ocfs2-get-rid-of-ocfs2_is_o2cb_active-function
+++ a/fs/ocfs2/stackglue.h
@@ -298,9 +298,6 @@ void ocfs2_stack_glue_set_max_proto_vers
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 */
_
Patches currently in -mm which might be from ghe@xxxxxxxx are
ocfs2-get-rid-of-ocfs2_is_o2cb_active-function.patch
ocfs2-give-an-obvious-tip-for-dismatch-cluster-names.patch
ocfs2-give-an-obvious-tip-for-dismatch-cluster-names-v2.patch
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