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3f38507855
During recovery with batch I/O, UBLK_U_IO_FETCH_IO_CMDS command fails with -ENODEV because ublk_batch_attach() rejects them when ubq->canceling is set. The canceling flag remains set until all queues are ready. Fix this by tracking per-queue readiness and clearing ubq->canceling as soon as each individual queue becomes ready, rather than waiting for all queues. This allows subsequent UBLK_U_IO_FETCH_IO_CMDS commands to succeed during recovery. Changes: - Add ubq->nr_io_ready to track I/Os ready per queue - Add ub->nr_queue_ready to track number of ready queues - Add ublk_queue_ready() helper to check queue readiness - Redefine ublk_dev_ready() based on queue count instead of I/O count - Clear ubq->canceling immediately when queue becomes ready - Add ublk_queue_reset_io_flags() to reset per-queue flags Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>