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btrfs: tree-checker: Add EXTENT_DATA_REF check

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EXTENT_DATA_REF is a little like DIR_ITEM which contains hash in its
key->offset.

This patch will check the following contents:
- Key->objectid
  Basic alignment check.

- Hash
  Hash of each extent_data_ref item must match key->offset.

- Offset
  Basic alignment check.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2019-08-09 09:24:24 +08:00 • committed by David Sterba
parent e2406a6f13
commit 0785a9aacf
3 changed files with 50 additions and 1 deletions
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2
fs/btrfs/extent-tree.c
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@ -438,7 +438,7 @@ int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
return BTRFS_REF_TYPE_INVALID;
}
static u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset)
u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset)
{
u32 high_crc = ~(u32)0;
u32 low_crc = ~(u32)0;