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H A Dtree-checker.cdiff f82d1c7ca8ae1bf89e8d78c5ecb56b6b228c1a75 Thu Aug 08 20:24:22 CDT 2019 Qu Wenruo <wqu@suse.com> btrfs: tree-checker: Add EXTENT_ITEM and METADATA_ITEM check

This patch introduces the ability to check extent items.

This check involves:
- key->objectid check
Basic alignment check.

- key->type check
Against btrfs_extent_item::type and SKINNY_METADATA feature.

- key->offset alignment check for EXTENT_ITEM

- key->offset check for METADATA_ITEM

- item size check
Both against minimal size and stepping check.

- btrfs_extent_item check
Checks its flags and generation.

- btrfs_extent_inline_ref checks
Against 4 types inline ref.
Checks bytenr alignment and tree level.

- btrfs_extent_item::refs check
Check against total refs found in inline refs.

This check would be the most complex single item check due to its nature
of inlined items.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>