1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
#!/usr/bin/python3
import btrfs
import sys
load_data_refs = True
load_metadata_refs = True
if len(sys.argv) < 3:
print("Usage: {} <vaddr> <mountpoint>".format(sys.argv[0]))
sys.exit(1)
vaddr = int(sys.argv[1])
with btrfs.FileSystem(sys.argv[2]) as fs:
block_group = fs.block_group(vaddr)
print(block_group)
for extent in fs.extents(vaddr, vaddr + block_group.length - 1,
load_data_refs, load_metadata_refs):
print(extent)
if isinstance(extent, btrfs.ctree.ExtentItem):
if extent.flags & btrfs.ctree.EXTENT_FLAG_DATA and load_data_refs:
for data_ref in extent.extent_data_refs:
print(" " + str(data_ref))
for shared_ref in extent.shared_data_refs:
print(" " + str(shared_ref))
elif extent.flags & btrfs.ctree.EXTENT_FLAG_TREE_BLOCK and load_metadata_refs:
print(" " + str(extent.tree_block_info))
for tree_block_backref in extent.tree_block_refs:
print(" " + str(tree_block_backref))
for shared_block_backref in extent.shared_block_refs:
print(" " + str(shared_block_backref))
elif isinstance(extent, btrfs.ctree.MetaDataItem) and load_metadata_refs:
for tree_block_backref in extent.tree_block_refs:
print(" " + str(tree_block_backref))
for shared_block_backref in extent.shared_block_refs:
print(" " + str(shared_block_backref))
|
