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#!/usr/bin/python3
import btrfs
import sys
if len(sys.argv) < 3:
print("Usage: {} <tree> <mountpoint>".format(sys.argv[0]))
sys.exit(1)
try:
tree = int(sys.argv[1])
except ValueError:
tree = {
'root': btrfs.ctree.ROOT_TREE_OBJECTID,
'extent': btrfs.ctree.EXTENT_TREE_OBJECTID,
'chunk': btrfs.ctree.CHUNK_TREE_OBJECTID,
'dev': btrfs.ctree.DEV_TREE_OBJECTID,
'fs': btrfs.ctree.FS_TREE_OBJECTID,
'csum': btrfs.ctree.CSUM_TREE_OBJECTID,
'quota': btrfs.ctree.QUOTA_TREE_OBJECTID,
'uuid': btrfs.ctree.UUID_TREE_OBJECTID,
'free_space': btrfs.ctree.FREE_SPACE_TREE_OBJECTID,
'tree_log': btrfs.ctree.TREE_LOG_OBJECTID,
'tree_log_fixup': btrfs.ctree.TREE_LOG_FIXUP_OBJECTID,
'tree_reloc': btrfs.ctree.TREE_RELOC_OBJECTID,
'data_reloc': btrfs.ctree.DATA_RELOC_TREE_OBJECTID,
}.get(sys.argv[1].lower(), None)
if tree is None:
print("ERROR: specify tree number or short name (e.g. root, extent, fs)")
sys.exit(1)
with btrfs.FileSystem(sys.argv[2]) as fs:
try:
btrfs.utils.pretty_print(
(btrfs.ctree.classify(header, data)
for header, data in btrfs.ioctl.search_v2(fs.fd, tree))
)
except FileNotFoundError:
print("ERROR: tree {} does not exist".format(tree))
sys.exit(1)
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