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archiver checker: better error logging, give chunk_id and sequence numbers

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can be used together with borg debug-dump-archive-items.
This commit is contained in:
Thomas Waldmann 2015-11-03 23:45:49 +01:00
parent d2b7dbc0a8
commit 47813f6f6a
1 changed files with 19 additions and 7 deletions
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26
borg/archive.py
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@ -788,21 +788,33 @@ def missing_chunk_detector(chunk_id):
_state += 1
return _state
def report(msg, chunk_id, chunk_no):
cid = hexlify(chunk_id).decode('ascii')
msg += ' [chunk: %06d_%s]' % (chunk_no, cid) # see debug-dump-archive-items
self.report_progress(msg, error=True)
i = 0
for state, items in groupby(archive[b'items'], missing_chunk_detector):
items = list(items)
if state % 2:
self.report_progress('Archive metadata damage detected', error=True)
for chunk_id in items:
report('item metadata chunk missing', chunk_id, i)
i += 1
continue
if state > 0:
unpacker.resync()
for chunk_id, cdata in zip(items, repository.get_many(items)):
unpacker.feed(self.key.decrypt(chunk_id, cdata))
for item in unpacker:
if not isinstance(item, dict):
self.report_progress('Did not get expected metadata dict - archive corrupted!',
error=True)
continue
yield item
try:
for item in unpacker:
if isinstance(item, dict):
yield item
else:
report('Did not get expected metadata dict when unpacking item metadata', chunk_id, i)
except Exception:
report('Exception while unpacking item metadata', chunk_id, i)
raise
i += 1
repository = cache_if_remote(self.repository)
if archive is None: