fs/bcachefs/disk_accounting_format.h

1 /* SPDX-License-Identifier: GPL-2.0 */
8  * Disk accounting - KEY_TYPE_accounting - on disk format:
17  * This is a type-tagged union of all our various subtypes; a disk accounting
18  * key can be device counters, replicas counters, et cetera - it's extensible.
29  * yet - it does not know definitively whether individual entries are dirty and
33  * accounting update a unique version number - a total ordering in time; the
123  * No subtypes - number of inodes in the entire filesystem
125  * XXX: perhaps we could add a per-subvolume counter?
170  * On disk usage by snapshot id; counts same values as replicas counter, but
185  *   sum of extent sizes - bkey size
189  *   sum of on disk size - same values tracked by replicas counters
192  * This tracks on disk fragmentation.
199  * Simple counter of the amount of data (on disk sectors) rebalance needs to