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files cache: update inode number, fixes #2226

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Thomas Waldmann 2017-02-27 15:30:55 +01:00
parent 1a67b82726
commit 0721cb1ede
1 changed files with 9 additions and 1 deletions
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10
src/borg/cache.py
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@ -575,7 +575,15 @@ def file_known_and_unchanged(self, path_hash, st, ignore_inode=False):
entry = FileCacheEntry(*msgpack.unpackb(entry))
if (entry.size == st.st_size and entry.mtime == st.st_mtime_ns and
(ignore_inode or entry.inode == st.st_ino)):
self.files[path_hash] = msgpack.packb(entry._replace(age=0))
# we ignored the inode number in the comparison above or it is still same.
# if it is still the same, replacing it in the tuple doesn't change it.
# if we ignored it, a reason for doing that is that files were moved to a new
# disk / new fs (so a one-time change of inode number is expected) and we wanted
# to avoid everything getting chunked again. to be able to re-enable the inode
# number comparison in a future backup run (and avoid chunking everything
# again at that time), we need to update the inode number in the cache with what
# we see in the filesystem.
self.files[path_hash] = msgpack.packb(entry._replace(inode=st.st_ino, age=0))
return entry.chunk_ids
else:
return None