From patchwork Mon Feb 26 03:14:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Li Nan X-Patchwork-Id: 13571213 Received: from dggsgout11.his.huawei.com (unknown [45.249.212.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A544014273; Mon, 26 Feb 2024 03:20:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708917642; cv=none; b=qOgCmb+58gbKZ/g/IlN7ijotxRuIsATfJRNwraMhRt06DuYtrkk1lzLthFO/sPISJbVFADVX0c0LUF1plCDfxLWrVgsnzO/9SWObyQv3bfDaSrd4YZJbF68yMDt3caxMuFQqn9kWKLWLLwYqxJ0sIfJOaUCswJkvmcAg9irmkVU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708917642; c=relaxed/simple; bh=40SyGCbiX4rvZexZzYmMqhaF5bdF2/siL2OVPP1zPbs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Jcxo7byaMV5UzEHEkUNz9MQfWi0bFT5w1gWu4D9rtQCfUeVB1bEF5bkwECrUVFHUUHEkGjRsIVnv+8Moaq9aT9uAIAaTd517ZUUtOML5vrAK4Y2eh1OMI20wwsqPXA0ybE8DjssfphMoK6GghybSNCqW5ux4pPhQmbL+AO0Izsc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.235]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4Tjm8f2sv2z4f3kK8; Mon, 26 Feb 2024 11:20:34 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.112]) by mail.maildlp.com (Postfix) with ESMTP id AF16A1A0232; Mon, 26 Feb 2024 11:20:37 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP1 (Coremail) with SMTP id cCh0CgAX5g5_A9xl7gKzFA--.13921S12; Mon, 26 Feb 2024 11:20:37 +0800 (CST) From: linan666@huaweicloud.com To: song@kernel.org, shli@fb.com, neilb@suse.com Cc: mariusz.tkaczyk@linux.intel.com, linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, linan666@huaweicloud.com, yukuai3@huawei.com, yi.zhang@huawei.com, houtao1@huawei.com, yangerkun@huawei.com Subject: [PATCH v7 8/9] md: clean up openers check in do_md_stop() and md_set_readonly() Date: Mon, 26 Feb 2024 11:14:43 +0800 Message-Id: <20240226031444.3606764-9-linan666@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240226031444.3606764-1-linan666@huaweicloud.com> References: <20240226031444.3606764-1-linan666@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-raid@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: cCh0CgAX5g5_A9xl7gKzFA--.13921S12 X-Coremail-Antispam: 1UD129KBjvJXoWxCw1UWw1xuF1DCr1xJrW3trb_yoWrtw1kp3 yIqas8Gr4UXrySqF4UGFWkW3W5tw18tFyktry3C3yru3WftrnrGFyFgF18ArW8Kas7Awn8 Xa1UAFyUuFy7GrUanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUQF14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F 4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq 3wAac4AC62xK8xCEY4vEwIxC4wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0V AKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1l Ox8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErc IFxwACI402YVCY1x02628vn2kIc2xKxwAKzVCY07xG64k0F24l42xK82IYc2Ij64vIr41l 4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67 AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8I cVAFwI0_JFI_Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26F4j6r4UJwCI42IY6xAIw20EY4 v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AK xVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUvzuAUUUUU= X-CM-SenderInfo: polqt0awwwqx5xdzvxpfor3voofrz/ From: Li Nan Before stopping or setting readonly, mddev_set_closing_and_sync_blockdev() is always called to check the openers. So no longer need to check it again in do_md_stop() and md_set_readonly(). Clean it up. Signed-off-by: Li Nan --- drivers/md/md.c | 37 ++++++++++++++----------------------- 1 file changed, 14 insertions(+), 23 deletions(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index fe0c7c80fb5e..82c12ecf17a6 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -4482,8 +4482,8 @@ array_state_show(struct mddev *mddev, char *page) return sprintf(page, "%s\n", array_states[st]); } -static int do_md_stop(struct mddev *mddev, int ro, struct block_device *bdev); -static int md_set_readonly(struct mddev *mddev, struct block_device *bdev); +static int do_md_stop(struct mddev *mddev, int ro); +static int md_set_readonly(struct mddev *mddev); static int restart_array(struct mddev *mddev); static ssize_t @@ -4544,14 +4544,14 @@ array_state_store(struct mddev *mddev, const char *buf, size_t len) case inactive: /* stop an active array, return 0 otherwise */ if (mddev->pers) - err = do_md_stop(mddev, 2, NULL); + err = do_md_stop(mddev, 2); break; case clear: - err = do_md_stop(mddev, 0, NULL); + err = do_md_stop(mddev, 0); break; case readonly: if (mddev->pers) - err = md_set_readonly(mddev, NULL); + err = md_set_readonly(mddev); else { mddev->ro = MD_RDONLY; set_disk_ro(mddev->gendisk, 1); @@ -4561,7 +4561,7 @@ array_state_store(struct mddev *mddev, const char *buf, size_t len) case read_auto: if (mddev->pers) { if (md_is_rdwr(mddev)) - err = md_set_readonly(mddev, NULL); + err = md_set_readonly(mddev); else if (mddev->ro == MD_RDONLY) err = restart_array(mddev); if (err == 0) { @@ -6419,7 +6419,7 @@ void md_stop(struct mddev *mddev) EXPORT_SYMBOL_GPL(md_stop); -static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) +static int md_set_readonly(struct mddev *mddev) { int err = 0; int did_freeze = 0; @@ -6437,9 +6437,7 @@ static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); mddev_lock_nointr(mddev); - mutex_lock(&mddev->open_mutex); - if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || - test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { + if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { pr_warn("md: %s still in use.\n",mdname(mddev)); err = -EBUSY; goto out; @@ -6464,7 +6462,6 @@ static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) sysfs_notify_dirent_safe(mddev->sysfs_state); } - mutex_unlock(&mddev->open_mutex); return err; } @@ -6472,8 +6469,7 @@ static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) * 0 - completely stop and dis-assemble array * 2 - stop but do not disassemble array */ -static int do_md_stop(struct mddev *mddev, int mode, - struct block_device *bdev) +static int do_md_stop(struct mddev *mddev, int mode) { struct gendisk *disk = mddev->gendisk; struct md_rdev *rdev; @@ -6486,12 +6482,9 @@ static int do_md_stop(struct mddev *mddev, int mode, stop_sync_thread(mddev, true, false); - mutex_lock(&mddev->open_mutex); - if ((mddev->pers && atomic_read(&mddev->openers) > !!bdev) || - mddev->sysfs_active || + if (mddev->sysfs_active || test_bit(MD_RECOVERY_RUNNING, &mddev->recovery)) { pr_warn("md: %s still in use.\n",mdname(mddev)); - mutex_unlock(&mddev->open_mutex); if (did_freeze) { clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); @@ -6513,13 +6506,11 @@ static int do_md_stop(struct mddev *mddev, int mode, sysfs_unlink_rdev(mddev, rdev); set_capacity_and_notify(disk, 0); - mutex_unlock(&mddev->open_mutex); mddev->changed = 1; if (!md_is_rdwr(mddev)) mddev->ro = MD_RDWR; - } else - mutex_unlock(&mddev->open_mutex); + } /* * Free resources if final stop */ @@ -6565,7 +6556,7 @@ static void autorun_array(struct mddev *mddev) err = do_md_run(mddev); if (err) { pr_warn("md: do_md_run() returned %d\n", err); - do_md_stop(mddev, 0, NULL); + do_md_stop(mddev, 0); } } @@ -7734,11 +7725,11 @@ static int md_ioctl(struct block_device *bdev, blk_mode_t mode, goto unlock; case STOP_ARRAY: - err = do_md_stop(mddev, 0, bdev); + err = do_md_stop(mddev, 0); goto unlock; case STOP_ARRAY_RO: - err = md_set_readonly(mddev, bdev); + err = md_set_readonly(mddev); goto unlock; case HOT_REMOVE_DISK: