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| author | Naohiro Aota <naohiro.aota@wdc.com> | 2021-02-04 11:22:13 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2021-02-09 02:46:07 +0100 |
| commit | de17addce7a20db311c020fa91497a7341782d2d (patch) | |
| tree | ea7bbc2a3b7c164293ff122ac77406a76e2effdb /fs/btrfs/volumes.c | |
| parent | btrfs: zoned: implement cloning for zoned device-replace (diff) | |
| download | linux-de17addce7a20db311c020fa91497a7341782d2d.tar.xz linux-de17addce7a20db311c020fa91497a7341782d2d.zip | |
btrfs: zoned: implement copying for zoned device-replace
This is 3/4 patch to implement device-replace on zoned filesystems.
This commit implements copying. To do this, it tracks the write pointer
during the device replace process. As device-replace's copy process is
smart enough to only copy used extents on the source device, we have to
fill the gap to honor the sequential write requirement in the target
device.
The device-replace process on zoned filesystems must copy or clone all
the extents in the source device exactly once. So, we need to ensure
allocations started just before the dev-replace process to have their
corresponding extent information in the B-trees.
finish_extent_writes_for_zoned() implements that functionality, which
basically is the removed code in the commit 042528f8d840 ("Btrfs: fix
block group remaining RO forever after error during device replace").
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/volumes.c')
| -rw-r--r-- | fs/btrfs/volumes.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 52ec6721ada2..1312b17a6b49 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -5978,7 +5978,7 @@ static bool is_block_group_to_copy(struct btrfs_fs_info *fs_info, u64 logical) struct btrfs_block_group *cache; bool ret; - /* Non-ZONED mode does not use "to_copy" flag */ + /* Non zoned filesystem does not use "to_copy" flag */ if (!btrfs_is_zoned(fs_info)) return false; |