bcachefs
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Disk format change for snapshots
🕑 Added 2021-03-25 00:13:29 +0000 UTCTurns out, there was a hiccup after all in the on disk format changes for snapshots: it turns out we were generating packed bkey formats where the snapshot field was too big, and this breaks the lookup code when we start using the snapshot field.
I just pushed out code to scan the btree for btree nodes that have these bad bkey formats and rewrite them, and flip a compatible feature bit once that's been done.
In order to get a smooth upgrade process, you'll need to upgrade your kernel and tools to the current latest master branch and mount or fsck once before I start pushing out snapshots. The patch in the snapshots branch that starts using the snapshots field will refuse to mount if that feature bit hasn't been set.
Comments
veritanuda
haha.. ok.. Still not got around to testing
