From a634644751c46238df58bbfe992e30c1668388db Mon Sep 17 00:00:00 2001 From: Gang He Date: Fri, 2 Nov 2018 15:48:03 -0700 Subject: [PATCH] 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@suse.com Signed-off-by: Gang He Reviewed-by: Joseph Qi Reviewed-by: Eric Ren Acked-by: Changwei Ge Cc: Mark Fasheh Cc: Joel Becker Cc: Junxiao Bi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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 933aac5da193..178cb9e6772a 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -3603,7 +3603,7 @@ 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 d6c350ba25b9..c4b029c43464 100644 --- a/fs/ocfs2/stackglue.c +++ b/fs/ocfs2/stackglue.c @@ -48,12 +48,6 @@ static char ocfs2_hb_ctl_path[OCFS2_MAX_HB_CTL_PATH] = "/sbin/ocfs2_hb_ctl"; */ 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 e3036e1790e8..f2dce10fae54 100644 --- a/fs/ocfs2/stackglue.h +++ b/fs/ocfs2/stackglue.h @@ -298,9 +298,6 @@ void ocfs2_stack_glue_set_max_proto_version(struct ocfs2_protocol_version *max_p 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 */