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storage/reflink: inline and simplify _cmd()

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Rusty Bird 2018-09-11 23:50:12 +00:00
parent fb06a8089a
commit 69af0a48ec
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1 changed files with 4 additions and 13 deletions
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17
qubes/storage/reflink.py
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@ -409,19 +409,10 @@ def _copy_file(src, dst):
raise FileNotFoundError(src)
with _replace_file(dst) as tmp:
LOGGER.info('Copying file: %s -> %s', src, tmp.name)
_cmd('cp', '--sparse=always', '--reflink=auto', src, tmp.name)
def _cmd(*args):
''' Run command until finished; return stdout (as bytes) if it
exited 0. Otherwise, raise a detailed StoragePoolException.
'''
try:
return subprocess.run(args, check=True,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE).stdout
except subprocess.CalledProcessError as ex:
msg = '{} err={!r} out={!r}'.format(ex, ex.stderr, ex.stdout)
raise qubes.storage.StoragePoolException(msg) from ex
cmd = 'cp', '--sparse=always', '--reflink=auto', src, tmp.name
p = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
if p.returncode != 0:
raise qubes.storage.StoragePoolException(str(p))
def is_reflink_supported(dst_dir, src_dir=None):
''' Return whether destination directory supports reflink copies