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Consistency checking and fixing

Metadata about snapshots is currently saved in *.info files. In some circumstances, these files need not to be consistent with the snapshot btrfs subvolumes. For example, there are *.info files without the pertaining subvolumes. These files are listed as "snapshots" but schnapps can't do anything with them (each attempt fails with a non-explaining error message). And there is no way (other than low-level manual cleanup) how to fix it.

I think that schnapps should provide solution for this. There are two possible ways:

  1. Before each operation, a consistency check/repair is executed.
  2. schnapps cleanup enhancement (consistency checking and fixing before removing old snapshots)

The first way is more comfortable but may lead to delaying of operations.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information