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authorJunxiao Bi <ocfs2-devel@oss.oracle.com>2022-05-18 16:52:23 -0700
committerakpm <akpm@linux-foundation.org>2022-05-25 13:05:42 -0700
commit0b6d14e3dbde9de158263ce5e4a27112693e71ac (patch)
tree7a0c5aa41112233f1a98966fcb88f0088896f50b /fs/ocfs2/dlmfs
parent69bc169ec33f101fe6d296976aaa34f51edbaa9e (diff)
ocfs2: dlmfs: don't clear USER_LOCK_ATTACHED when destroying lock
The following function is the only place that checks USER_LOCK_ATTACHED. This flag is set when lock request is granted through user_ast() and only the following function will clear it. Checking of this flag here is to make sure ocfs2_dlm_unlock is not issued if this lock is never granted. For example, lock file is created and then get removed, open file never happens. Clearing the flag here is not necessary because this is the only function that checks it, if another flow is executing user_dlm_destroy_lock(), it will bail out at the beginning because of USER_LOCK_IN_TEARDOWN and never check USER_LOCK_ATTACHED. Drop the clear, so we don't need take care of it for the following error handling patch. int user_dlm_destroy_lock(struct user_lock_res *lockres) { ... status = 0; if (!(lockres->l_flags & USER_LOCK_ATTACHED)) { spin_unlock(&lockres->l_lock); goto bail; } lockres->l_flags &= ~USER_LOCK_ATTACHED; lockres->l_flags |= USER_LOCK_BUSY; spin_unlock(&lockres->l_lock); status = ocfs2_dlm_unlock(conn, &lockres->l_lksb, DLM_LKF_VALBLK); if (status) { user_log_dlm_error("ocfs2_dlm_unlock", status, lockres); goto bail; } ... } V1 discussion with Joseph: https://lore.kernel.org/all/7b620c53-0c45-da2c-829e-26195cbe7d4e@linux.alibaba.com/T/ Link: https://lkml.kernel.org/r/20220518235224.87100-1-junxiao.bi@oracle.com Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <gechangwei@live.cn> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/dlmfs')
-rw-r--r--fs/ocfs2/dlmfs/userdlm.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/ocfs2/dlmfs/userdlm.c b/fs/ocfs2/dlmfs/userdlm.c
index 29f183a15798..af0be612589c 100644
--- a/fs/ocfs2/dlmfs/userdlm.c
+++ b/fs/ocfs2/dlmfs/userdlm.c
@@ -619,7 +619,6 @@ int user_dlm_destroy_lock(struct user_lock_res *lockres)
goto bail;
}
- lockres->l_flags &= ~USER_LOCK_ATTACHED;
lockres->l_flags |= USER_LOCK_BUSY;
spin_unlock(&lockres->l_lock);