Kent Overstreet dcffc3b1ae bcachefs: Split up bch_dev.io_ref ...

We now have separate per device io_refs for read and write access.

This fixes a device removal bug where the discard workers were still
running while we're removing alloc info for that device.

It's also a bit of hardening; we no longer allow writes to devices that
are read-only.

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

2025-04-02 10:24:34 -04:00

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