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Add XFS metadata: blocks per file and block size #33

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merged 4 commits into from
Oct 7, 2024
Merged

Add XFS metadata: blocks per file and block size #33

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030dffb
Expose the number of blocks of an inode
twiggler Oct 1, 2024
239f998
Add assetions for number_of_blocks and xfs block size
twiggler Oct 2, 2024
3a7b70e
Add some additional assertions on number of blocks
twiggler Oct 3, 2024
c176748
Rename number of blocks property
twiggler Oct 7, 2024
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4 changes: 4 additions & 0 deletions dissect/xfs/xfs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -294,6 +294,10 @@ def _has_large_extent_counts(self) -> bool:
def size(self) -> int:
return self.inode.di_size

@property
def nblocks(self) -> int:
return self.inode.di_nblocks

@property
def data_extents(self) -> int:
if self._has_large_extent_counts():
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7 changes: 7 additions & 0 deletions tests/test_xfs.py
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Expand Up @@ -11,6 +11,7 @@ def test_xfs(xfs_bin):
xfs = XFS(xfs_bin)

assert xfs.version == 5
assert xfs.block_size == 4096
assert str(xfs.uuid) == "3fb8342e-e144-4f0c-8bd7-725e78966200"
assert str(xfs.meta_uuid) == "00000000-0000-0000-0000-000000000000"

Expand All @@ -22,9 +23,11 @@ def test_xfs(xfs_bin):
assert list(root.listdir().keys()) == [".", "..", "test_file", "test_dir", "test_link"]

test_file = xfs.get("test_file")
assert test_file.nblocks == 1
assert test_file.open().read() == b"test content\n"

test_link = xfs.get("test_link")
assert test_link.nblocks == 0
assert test_link.filetype == stat.S_IFLNK
assert test_link.link == "test_dir/test_file"

Expand All @@ -34,18 +37,22 @@ def test_xfs_sparse(xfs_sparse_bin):

sparse_start = xfs.get("sparse_start")
assert sparse_start.size == 0x258000
assert sparse_start.nblocks == 200
assert sparse_start.dataruns() == [(None, 400), (1392, 200)]

sparse_hole = xfs.get("sparse_hole")
assert sparse_hole.size == 0x258000
assert sparse_hole.nblocks == 400
assert sparse_hole.dataruns() == [(1792, 200), (None, 200), (2192, 200)]

sparse_end = xfs.get("sparse_end")
assert sparse_end.size == 0x190000
assert sparse_end.nblocks == 200
assert sparse_end.dataruns() == [(2392, 200), (None, 200)]

sparse_all = xfs.get("sparse_all")
assert sparse_all.size == 0x500000
assert sparse_all.nblocks == 0
assert sparse_all.dataruns() == [(None, 1280)]


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