bcachefs: next_rebalance_extent() now handles replicas changesbcachefs-testing

This obsoletes BCH_DATA_OP_drop_extra_replicas, BCH_DATA_OP_rereplicate.

(And the code is taken from drop_extra_replicas_pred() and
rereplicate_pred() in move.c).

Changes to the data_replicas setting will now automatically be applied
to existing data without any additional user action.

NOTE: we don't yet have a mechanism for guessing how much space an
option change will require (and reserving said space), until we have
that users will have to be careful not to run a filesystem out of free
space with an option change.

XXX: support metadata

XXX: BCH_DATA_OP_rereplicate additionally calls bch2_replicas_gc2():
this clears out stale replicas entries from the superblock (based on the
accounting btree), ensuring the "can we mount degraded without missing
data?" table is accurate.

We'll need to figure out a new place to plumb this.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

0 files changed, 0 insertions, 0 deletions