From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932562AbbBBC5j (ORCPT ); Sun, 1 Feb 2015 21:57:39 -0500 Received: from linuxhacker.ru ([217.76.32.60]:59790 "EHLO fiona.linuxhacker.ru" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1754691AbbBBCxF (ORCPT ); Sun, 1 Feb 2015 21:53:05 -0500 From: green@linuxhacker.ru To: Greg Kroah-Hartman , devel@driverdev.osuosl.org, Andreas Dilger Cc: Linux Kernel Mailing List , Hongchao Zhang , Oleg Drokin Subject: [PATCH 05/20] staging/lustre/obdclass: fix a race in recovery Date: Sun, 1 Feb 2015 21:52:04 -0500 Message-Id: <1422845539-26742-6-git-send-email-green@linuxhacker.ru> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1422845539-26742-1-git-send-email-green@linuxhacker.ru> References: <1422845539-26742-1-git-send-email-green@linuxhacker.ru> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hongchao Zhang in "class_export_recovery_cleanup", the check of the flag "exp->exp_req_replay_needed" should be protected by "exp_lock". Signed-off-by: Hongchao Zhang Reviewed-on: http://review.whamcloud.com/10849 Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5128 Reviewed-by: Fan Yong Reviewed-by: Andreas Dilger Signed-off-by: Oleg Drokin --- drivers/staging/lustre/lustre/obdclass/genops.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/staging/lustre/lustre/obdclass/genops.c b/drivers/staging/lustre/lustre/obdclass/genops.c index 736ca41..8250821 100644 --- a/drivers/staging/lustre/lustre/obdclass/genops.c +++ b/drivers/staging/lustre/lustre/obdclass/genops.c @@ -1151,22 +1151,24 @@ void class_export_recovery_cleanup(struct obd_export *exp) exp->exp_obd->obd_stale_clients++; } spin_unlock(&obd->obd_recovery_task_lock); + + spin_lock(&exp->exp_lock); /** Cleanup req replay fields */ if (exp->exp_req_replay_needed) { - spin_lock(&exp->exp_lock); exp->exp_req_replay_needed = 0; - spin_unlock(&exp->exp_lock); + LASSERT(atomic_read(&obd->obd_req_replay_clients)); atomic_dec(&obd->obd_req_replay_clients); } + /** Cleanup lock replay data */ if (exp->exp_lock_replay_needed) { - spin_lock(&exp->exp_lock); exp->exp_lock_replay_needed = 0; - spin_unlock(&exp->exp_lock); + LASSERT(atomic_read(&obd->obd_lock_replay_clients)); atomic_dec(&obd->obd_lock_replay_clients); } + spin_unlock(&exp->exp_lock); } /* This function removes 1-3 references from the export: -- 2.1.0