From patchwork Wed Jul 15 10:48:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nikolay Borisov X-Patchwork-Id: 11664765 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0FD6C722 for ; Wed, 15 Jul 2020 10:48:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ECF23206F4 for ; Wed, 15 Jul 2020 10:48:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729404AbgGOKsy (ORCPT ); Wed, 15 Jul 2020 06:48:54 -0400 Received: from [195.135.220.15] ([195.135.220.15]:37930 "EHLO mx2.suse.de" rhost-flags-FAIL-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1729284AbgGOKsx (ORCPT ); Wed, 15 Jul 2020 06:48:53 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 421D8B0A5; Wed, 15 Jul 2020 10:48:55 +0000 (UTC) From: Nikolay Borisov To: linux-btrfs@vger.kernel.org Cc: Nikolay Borisov Subject: [PATCH 2/5] btrfs: Factor out loop logic from btrfs_free_extra_devids Date: Wed, 15 Jul 2020 13:48:47 +0300 Message-Id: <20200715104850.19071-3-nborisov@suse.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200715104850.19071-1-nborisov@suse.com> References: <20200715104850.19071-1-nborisov@suse.com> Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org This prepares the code to switching seeds devices to a proper list. Signed-off-by: Nikolay Borisov Reported-by: kernel test robot Reviewed-by: Josef Bacik --- fs/btrfs/volumes.c | 34 +++++++++++++++++++++------------- 1 file changed, 21 insertions(+), 13 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index ce01e44f8134..db29fc4fbe89 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1024,28 +1024,24 @@ static struct btrfs_fs_devices *clone_fs_devices(struct btrfs_fs_devices *orig) return ERR_PTR(ret); } -/* - * After we have read the system tree and know devids belonging to - * this filesystem, remove the device which does not belong there. - */ -void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices, int step) + + +void __btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices, int step, + struct btrfs_device **latest_dev) { struct btrfs_device *device, *next; - struct btrfs_device *latest_dev = NULL; - mutex_lock(&uuid_mutex); -again: /* This is the initialized path, it is safe to release the devices. */ list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) { if (test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, - &device->dev_state)) { + &device->dev_state)) { if (!test_bit(BTRFS_DEV_STATE_REPLACE_TGT, - &device->dev_state) && + &device->dev_state) && !test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state) && - (!latest_dev || - device->generation > latest_dev->generation)) { - latest_dev = device; + (!*latest_dev || + device->generation > (*latest_dev)->generation)) { + *latest_dev = device; } continue; } @@ -1083,6 +1079,18 @@ void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices, int step) btrfs_free_device(device); } +} +/* + * After we have read the system tree and know devids belonging to + * this filesystem, remove the device which does not belong there. + */ +void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices, int step) +{ + struct btrfs_device *latest_dev = NULL; + + mutex_lock(&uuid_mutex); +again: + __btrfs_free_extra_devids(fs_devices, step, &latest_dev); if (fs_devices->seed) { fs_devices = fs_devices->seed; goto again;