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| author |   Misono Tomohiro <misono.tomohiro@jp.fujitsu.com> | 2018-07-31 16:20:21 +0900 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2018-08-06 13:13:01 +0200 |
| commit | 1e7e1f9e3aba00c9b9c323bfeeddafe69ff21ff6 (patch) | |
| tree | cb57869516b7c2b81f599405e8c1040b86804f42 /fs/btrfs | |
| parent | btrfs: extent-tree: Remove unused __btrfs_free_block_rsv (diff) | |
| download | linux-dev-1e7e1f9e3aba00c9b9c323bfeeddafe69ff21ff6.tar.xz linux-dev-1e7e1f9e3aba00c9b9c323bfeeddafe69ff21ff6.zip | |
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.c | 6 |
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 |