From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp1040.oracle.com ([141.146.126.69]:31381 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750835AbaHMGRO (ORCPT ); Wed, 13 Aug 2014 02:17:14 -0400 Received: from acsinet21.oracle.com (acsinet21.oracle.com [141.146.126.237]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id s7D6HD9E025143 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Wed, 13 Aug 2014 06:17:13 GMT Received: from userz7021.oracle.com (userz7021.oracle.com [156.151.31.85]) by acsinet21.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id s7D6HCvh018187 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL) for ; Wed, 13 Aug 2014 06:17:12 GMT Received: from abhmp0008.oracle.com (abhmp0008.oracle.com [141.146.116.14]) by userz7021.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id s7D6HBMF016401 for ; Wed, 13 Aug 2014 06:17:11 GMT From: Anand Jain To: linux-btrfs@vger.kernel.org Subject: [PATCH 3/8] btrfs: fix rw_devices miss match after seed replace Date: Wed, 13 Aug 2014 14:24:21 +0800 Message-Id: <1407911066-5363-3-git-send-email-anand.jain@oracle.com> In-Reply-To: <1407911066-5363-1-git-send-email-anand.jain@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: References: <1407911066-5363-1-git-send-email-anand.jain@oracle.com> reproducer: reproducer: mount /dev/sdb /btrfs btrfs dev add /dev/sdc /btrfs btrfs rep start -B /dev/sdb /dev/sdd /btrfs umount /btrfs WARNING: CPU: 0 PID: 3882 at fs/btrfs/volumes.c:892 __btrfs_close_devices+0x1c8/0x200 [btrfs]() which is WARN_ON(fs_devices->rw_devices); The problem here is that we did not add one to the rw_devices when we replace the seed device with a writable device. Signed-off-by: Anand Jain --- fs/btrfs/dev-replace.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index eea26e1..fb0a7fa 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -562,6 +562,8 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info, if (fs_info->fs_devices->latest_bdev == src_device->bdev) fs_info->fs_devices->latest_bdev = tgt_device->bdev; list_add(&tgt_device->dev_alloc_list, &fs_info->fs_devices->alloc_list); + if (src_device->fs_devices->seeding) + fs_info->fs_devices->rw_devices++; /* replace the sysfs entry */ btrfs_kobj_rm_device(fs_info, src_device); -- 2.0.0.153.g79dcccc