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fix ChunkerParams validator and tests

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Thomas Waldmann 2023-04-12 01:15:46 +02:00
parent 9307f804bf
commit 6d38530ff1
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GPG key ID: 243ACFA951F78E01
2 changed files with 20 additions and 14 deletions
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20
src/borg/helpers/parseformat.py
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@ -137,7 +137,7 @@ def ChunkerParams(s):
params = s.strip().split(",")
count = len(params)
if count == 0:
raise ValueError("no chunker params given")
raise argparse.ArgumentTypeError("no chunker params given")
algo = params[0].lower()
if algo == CH_FAIL and count == 3:
block_size = int(params[1])
@ -152,9 +152,11 @@ def ChunkerParams(s):
# or in-memory chunk management.
# choose the block (chunk) size wisely: if you have a lot of data and you cut
# it into very small chunks, you are asking for trouble!
raise ValueError("block_size must not be less than 64 Bytes")
raise argparse.ArgumentTypeError("block_size must not be less than 64 Bytes")
if block_size > MAX_DATA_SIZE or header_size > MAX_DATA_SIZE:
raise ValueError("block_size and header_size must not exceed MAX_DATA_SIZE [%d]" % MAX_DATA_SIZE)
raise argparse.ArgumentTypeError(
"block_size and header_size must not exceed MAX_DATA_SIZE [%d]" % MAX_DATA_SIZE
)
return algo, block_size, header_size
if algo == "default" and count == 1: # default
return CHUNKER_PARAMS
@ -162,14 +164,18 @@ def ChunkerParams(s):
if algo == CH_BUZHASH and count == 5 or count == 4: # [buzhash, ]chunk_min, chunk_max, chunk_mask, window_size
chunk_min, chunk_max, chunk_mask, window_size = (int(p) for p in params[count - 4 :])
if not (chunk_min <= chunk_mask <= chunk_max):
raise ValueError("required: chunk_min <= chunk_mask <= chunk_max")
raise argparse.ArgumentTypeError("required: chunk_min <= chunk_mask <= chunk_max")
if chunk_min < 6:
# see comment in 'fixed' algo check
raise ValueError("min. chunk size exponent must not be less than 6 (2^6 = 64B min. chunk size)")
raise argparse.ArgumentTypeError(
"min. chunk size exponent must not be less than 6 (2^6 = 64B min. chunk size)"
)
if chunk_max > 23:
raise ValueError("max. chunk size exponent must not be more than 23 (2^23 = 8MiB max. chunk size)")
raise argparse.ArgumentTypeError(
"max. chunk size exponent must not be more than 23 (2^23 = 8MiB max. chunk size)"
)
return CH_BUZHASH, chunk_min, chunk_max, chunk_mask, window_size
raise ValueError("invalid chunker params")
raise argparse.ArgumentTypeError("invalid chunker params")
def FilesCacheMode(s):

14
src/borg/testsuite/helpers.py
View file

@ -368,19 +368,19 @@ def test_chunkerparams():
assert ChunkerParams("fixed,4096") == ("fixed", 4096, 0)
assert ChunkerParams("fixed,4096,200") == ("fixed", 4096, 200)
# invalid values checking
with pytest.raises(ValueError):
with pytest.raises(ArgumentTypeError):
ChunkerParams("crap,1,2,3,4") # invalid algo
with pytest.raises(ValueError):
with pytest.raises(ArgumentTypeError):
ChunkerParams("buzhash,5,7,6,4095") # too small min. size
with pytest.raises(ValueError):
with pytest.raises(ArgumentTypeError):
ChunkerParams("buzhash,19,24,21,4095") # too big max. size
with pytest.raises(ValueError):
with pytest.raises(ArgumentTypeError):
ChunkerParams("buzhash,23,19,21,4095") # violates min <= mask <= max
with pytest.raises(ValueError):
with pytest.raises(ArgumentTypeError):
ChunkerParams("fixed,63") # too small block size
with pytest.raises(ValueError):
with pytest.raises(ArgumentTypeError):
ChunkerParams("fixed,%d,%d" % (MAX_DATA_SIZE + 1, 4096)) # too big block size
with pytest.raises(ValueError):
with pytest.raises(ArgumentTypeError):
ChunkerParams("fixed,%d,%d" % (4096, MAX_DATA_SIZE + 1)) # too big header size