On 12/21/20 10:49 PM, Naohiro Aota wrote:
This is 3/4 patch to implement device-replace on ZONED mode.This commit implement copying. So, it track the write pointer during device replace process. Device-replace's copying is smart to copy only used extents on source device, we have to fill the gap to honor the sequential write rule in the target device. Device-replace process in ZONED mode must copy or clone all the extents in the source device exactly once. So, we need to use 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"). Signed-off-by: Naohiro Aota <[email protected]>
Reviewed-by: Josef Bacik <[email protected]> Thanks, Josef
