From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cantor2.suse.de ([195.135.220.15]:46892 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932081AbaE2N3l (ORCPT ); Thu, 29 May 2014 09:29:41 -0400 Date: Thu, 29 May 2014 15:29:39 +0200 From: David Sterba To: Anand Jain Cc: linux-btrfs@vger.kernel.org, jeffm@suse.com, dsterba@suse.cz, clm@fb.com Subject: Re: [PATCH 3/4] btrfs: dev replace should replace the sysfs entry Message-ID: <20140529132939.GD29992@twin.jikos.cz> Reply-To: dsterba@suse.cz References: <1401096626-13210-1-git-send-email-anand.jain@oracle.com> <1401096626-13210-4-git-send-email-anand.jain@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <1401096626-13210-4-git-send-email-anand.jain@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Mon, May 26, 2014 at 05:30:25PM +0800, Anand Jain wrote: > when we replace the device its corresponding sysfs > entry has to be replaced as well > > Signed-off-by: Anand Jain > --- > fs/btrfs/dev-replace.c | 5 +++++ > 1 files changed, 5 insertions(+), 0 deletions(-) > > diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c > index 9f22905..f4f8728 100644 > --- a/fs/btrfs/dev-replace.c > +++ b/fs/btrfs/dev-replace.c > @@ -36,6 +36,7 @@ > #include "check-integrity.h" > #include "rcu-string.h" > #include "dev-replace.h" > +#include "sysfs.h" > > static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info, > int scrub_ret); > @@ -562,6 +563,10 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info, > fs_info->fs_devices->latest_bdev = tgt_device->bdev; > list_add(&tgt_device->dev_alloc_list, &fs_info->fs_devices->alloc_list); > > + /* replace the sysfs entry */ > + rm_device_membership(fs_info, src_device); > + add_device_membership(fs_info, tgt_device); > + > btrfs_rm_dev_replace_blocked(fs_info); > > btrfs_rm_dev_replace_srcdev(fs_info, src_device); 569 btrfs_rm_dev_replace_unblocked(fs_info); 570 The comment that follows says 571 /* 572 * this is again a consistent state where no dev_replace procedure 573 * is running, the target device is part of the filesystem, the 574 * source device is not part of the filesystem anymore and its 1st 575 * superblock is scratched out so that it is no longer marked to 576 * belong to this filesystem. 577 */ and I think this is the right place to put the sysfs updates, because the srcdev is processed.