From: Gang He <g...@suse.com> 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: https://urldefense.proofpoint.com/v2/url?u=http-3A__lkml.kernel.org_r_1495441079-2D11708-2D1-2Dgit-2Dsend-2Demail-2Dghe-40suse.com&d=DwIDAw&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=C7gAd4uDxlAvTdc0vmU6X8CMk6L2iDY8-HD0qT6Fo7Y&m=rnJPiY1_qJ7_Qs9xIYdLDclkzvGkELwC-r4P43wj1kE&s=4QPFsG8EG4HzXiHfjwTwa9v-sFT2lUoAhvTKPw0gR8Q&e= Signed-off-by: Gang He <g...@suse.com> Reviewed-by: Joseph Qi <jiangqi...@gmail.com> Reviewed-by: Eric Ren <z...@suse.com> Cc: Mark Fasheh <mfas...@versity.com> Cc: Joel Becker <jl...@evilplan.org> Cc: Junxiao Bi <junxiao...@oracle.com> Signed-off-by: Andrew Morton <a...@linux-foundation.org> --- 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 @@ -3413,7 +3413,7 @@ 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_VALNOTVALID 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 */ _ _______________________________________________ Ocfs2-devel mailing list Ocfs2-devel@oss.oracle.com https://oss.oracle.com/mailman/listinfo/ocfs2-devel
