linux-kernel - [PATCH 3.16 35/99] btrfs: dev-replace: go back to suspended state if target device is missing

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <lsq.1554212307.661908169@decadent.org.uk>
Date:   Tue, 02 Apr 2019 14:38:27 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Anand Jain" <anand.jain@...cle.com>,
        "David Sterba" <dsterba@...e.com>
Subject: [PATCH 3.16 35/99] btrfs: dev-replace: go back to suspended state
 if target device is missing

3.16.65-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Anand Jain <anand.jain@...cle.com>

commit 0d228ece59a35a9b9e8ff0d40653234a6d90f61e upstream.

At the time of forced unmount we place the running replace to
BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED state, so when the system comes
back and expect the target device is missing.

Then let the replace state continue to be in
BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED state instead of
BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED as there isn't any matching scrub
running as part of replace.

Fixes: e93c89c1aaaa ("Btrfs: add new sources for device replace code")
Signed-off-by: Anand Jain <anand.jain@...cle.com>
Reviewed-by: David Sterba <dsterba@...e.com>
Signed-off-by: David Sterba <dsterba@...e.com>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 fs/btrfs/dev-replace.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -782,6 +782,8 @@ int btrfs_resume_dev_replace_async(struc
 		btrfs_info(fs_info, "cannot continue dev_replace, tgtdev is missing");
 		btrfs_info(fs_info,
 			"you may cancel the operation after 'mount -o degraded'");
+		dev_replace->replace_state =
+					BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED;
 		btrfs_dev_replace_unlock(dev_replace);
 		return 0;
 	}