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authorMisono Tomohiro <misono.tomohiro@jp.fujitsu.com>2018-07-31 16:20:21 +0900
committerDavid Sterba <dsterba@suse.com>2018-08-06 13:13:01 +0200
commit1e7e1f9e3aba00c9b9c323bfeeddafe69ff21ff6 (patch)
treecb57869516b7c2b81f599405e8c1040b86804f42 /fs/btrfs
parent85c39548199b966062578fb99d4d4ecdeae2afae (diff)
downloadlinux-1e7e1f9e3aba00c9b9c323bfeeddafe69ff21ff6.tar.bz2
btrfs: replace: Reset on-disk dev stats value after replace
on-disk devs stats value is updated in btrfs_run_dev_stats(), which is called during commit transaction, if device->dev_stats_ccnt is not zero. Since current replace operation does not touch dev_stats_ccnt, on-disk dev stats value is not updated. Therefore "btrfs device stats" may return old device's value after umount/mount (Example: See "btrfs ins dump-t -t DEV $DEV" after btrfs/100 finish). Fix this by just incrementing dev_stats_ccnt in btrfs_dev_replace_finishing() when replace is succeeded and this will update the values. Signed-off-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/dev-replace.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 5a72f9933e58..dec01970d8c5 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -672,6 +672,12 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
btrfs_rm_dev_replace_unblocked(fs_info);
/*
+ * Increment dev_stats_ccnt so that btrfs_run_dev_stats() will
+ * update on-disk dev stats value during commit transaction
+ */
+ atomic_inc(&tgt_device->dev_stats_ccnt);
+
+ /*
* this is again a consistent state where no dev_replace procedure
* is running, the target device is part of the filesystem, the
* source device is not part of the filesystem anymore and its 1st