btrfs: introduce helpers for subpage error status
Introduce the following functions to handle subpage error status: - btrfs_subpage_set_error() - btrfs_subpage_clear_error() - btrfs_subpage_test_error() These helpers can only be called when the page has subpage attached and the range is ensured to be inside the page. - btrfs_page_set_error() - btrfs_page_clear_error() - btrfs_page_test_error() These helpers can handle both regular sector size and subpage without problem. Reviewed-by:Josef Bacik <josef@toxicpanda.com> Signed-off-by:
Qu Wenruo <wqu@suse.com> Reviewed-by:
David Sterba <dsterba@suse.com> Signed-off-by:
David Sterba <dsterba@suse.com>
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a1d767c1
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