btrfs: remove free space items when disabling space cache v1
When the filesystem transitions from space cache v1 to v2 or to nospace_cache, it removes the old cached data, but does not remove the FREE_SPACE items nor the free space inodes they point to. This doesn't cause any issues besides being a bit inefficient, since these items no longer do anything useful. To fix it, when we are mounting, and plan to disable the space cache, destroy each block group's free space item and free space inode. The code to remove the items is lifted from the existing use case of removing the block group, with a light adaptation to handle whether or not we have already looked up the free space inode. Reviewed-by:Josef Bacik <josef@toxicpanda.com> Signed-off-by:
Boris Burkov <boris@bur.io> Signed-off-by:
David Sterba <dsterba@suse.com>
parent
2838d255
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