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storage: fix search_pool_containing_dir()

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Canonicalize both directories, resolving symlink components. Compare
with commonpath() instead of startswith(), because /foo doesn't contain
/foobar.
This commit is contained in:
Rusty Bird 2018-09-11 23:50:21 +00:00
parent f0ee73e63f
commit d33bd3f2b6
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GPG Key ID: 469D78F47AAF2ADF
1 changed files with 6 additions and 2 deletions
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8
qubes/storage/__init__.py
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@ -884,17 +884,21 @@ def search_pool_containing_dir(pools, dir_path):
This is useful for implementing Pool.included_in method
'''
real_dir_path = os.path.realpath(dir_path)
# prefer filesystem pools
for pool in pools:
if hasattr(pool, 'dir_path'):
if dir_path.startswith(pool.dir_path):
pool_real_dir_path = os.path.realpath(pool.dir_path)
if os.path.commonpath([pool_real_dir_path, real_dir_path]) == \
pool_real_dir_path:
return pool
# then look for lvm
for pool in pools:
if hasattr(pool, 'thin_pool') and hasattr(pool, 'volume_group'):
if (pool.volume_group, pool.thin_pool) == \
DirectoryThinPool.thin_pool(dir_path):
DirectoryThinPool.thin_pool(real_dir_path):
return pool
return None