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#!/usr/bin/python3
import btrfs
import sys
if len(sys.argv) < 2:
print("Usage: {} <mountpoint>".format(sys.argv[0]))
sys.exit(1)
def subvolumes_inside(fs, parent_tree):
min_key = btrfs.ctree.Key(parent_tree, btrfs.ctree.ROOT_REF_KEY, 0)
max_key = btrfs.ctree.Key(parent_tree, btrfs.ctree.ROOT_REF_KEY + 1, 0) - 1
for header, data in btrfs.ioctl.search_v2(fs.fd, 1, min_key, max_key):
ref = btrfs.ctree.RootRef(header, data)
path = (btrfs.ioctl.ino_lookup(fs.fd, ref.parent_tree, ref.dirid).name_bytes +
ref.name).decode()
yield ref.tree, path
def print_subvolumes_inside(fs, parent_tree, parent_path):
for tree, path in subvolumes_inside(fs, parent_tree):
sub_path = "{}/{}".format(parent_path, path)
print("ID {} parent {} path {}".format(tree, parent_tree, sub_path))
print_subvolumes_inside(fs, tree, sub_path)
with btrfs.FileSystem(sys.argv[1]) as fs:
print_subvolumes_inside(fs, 5, '')
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