From: Alexander Aring Date: Wed, 6 Apr 2022 17:34:15 +0000 (-0400) Subject: dlm: fix wake_up() calls for pending remove X-Git-Tag: v5.17.14~112 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=86ee803ddab669ab08f4c7d0bd52f1c85cfba084;p=thirdparty%2Fkernel%2Fstable.git dlm: fix wake_up() calls for pending remove commit f6f7418357457ed58cbb020fc97e74d4e0e7b47f upstream. This patch move the wake_up() call at the point when a remove message completed. Before it was only when a remove message was going to be sent. The possible waiter in wait_pending_remove() waits until a remove is done if the resource name matches with the per ls variable ls->ls_remove_name. If this is the case we must wait until a pending remove is done which is indicated if DLM_WAIT_PENDING_COND() returns false which will always be the case when ls_remove_len and ls_remove_name are unset to indicate that a remove is not going on anymore. Fixes: 21d9ac1a5376 ("fs: dlm: use event based wait for pending remove") Cc: stable@vger.kernel.org Signed-off-by: Alexander Aring Signed-off-by: David Teigland Signed-off-by: Greg Kroah-Hartman --- diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c index bdb51d209ba25..727cba693448c 100644 --- a/fs/dlm/lock.c +++ b/fs/dlm/lock.c @@ -1795,7 +1795,6 @@ static void shrink_bucket(struct dlm_ls *ls, int b) memcpy(ls->ls_remove_name, name, DLM_RESNAME_MAXLEN); spin_unlock(&ls->ls_remove_spin); spin_unlock(&ls->ls_rsbtbl[b].lock); - wake_up(&ls->ls_remove_wait); send_remove(r); @@ -1804,6 +1803,7 @@ static void shrink_bucket(struct dlm_ls *ls, int b) ls->ls_remove_len = 0; memset(ls->ls_remove_name, 0, DLM_RESNAME_MAXLEN); spin_unlock(&ls->ls_remove_spin); + wake_up(&ls->ls_remove_wait); dlm_free_rsb(r); } @@ -4079,7 +4079,6 @@ static void send_repeat_remove(struct dlm_ls *ls, char *ms_name, int len) memcpy(ls->ls_remove_name, name, DLM_RESNAME_MAXLEN); spin_unlock(&ls->ls_remove_spin); spin_unlock(&ls->ls_rsbtbl[b].lock); - wake_up(&ls->ls_remove_wait); rv = _create_message(ls, sizeof(struct dlm_message) + len, dir_nodeid, DLM_MSG_REMOVE, &ms, &mh); @@ -4095,6 +4094,7 @@ static void send_repeat_remove(struct dlm_ls *ls, char *ms_name, int len) ls->ls_remove_len = 0; memset(ls->ls_remove_name, 0, DLM_RESNAME_MAXLEN); spin_unlock(&ls->ls_remove_spin); + wake_up(&ls->ls_remove_wait); } static int receive_request(struct dlm_ls *ls, struct dlm_message *ms)