selftests: ublk: handle UBLK_U_IO_PREP_IO_CMDS

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Implement support for UBLK_U_IO_PREP_IO_CMDS in the batch I/O framework:

- Add batch command initialization and setup functions
- Implement prep command queueing with proper buffer management
- Add command completion handling for prep and commit commands
- Integrate batch I/O setup into thread initialization
- Update CQE handling to support batch commands

The implementation uses the previously established buffer management
infrastructure to queue UBLK_U_IO_PREP_IO_CMDS commands. Commands are
prepared in the first thread context and use commit buffers for
efficient command batching.

Key changes:
- ublk_batch_queue_prep_io_cmds() prepares I/O command batches
- ublk_batch_compl_cmd() handles batch command completions
- Modified thread setup to use batch operations when enabled
- Enhanced buffer index calculation for batch mode

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

Ming Lei 2026-01-16 22:18:52 +08:00 • committed by Jens Axboe

parent dccbfa9d41

commit d468930a01

3 changed files with 174 additions and 12 deletions

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114

tools/testing/selftests/ublk/batch.c

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50

tools/testing/selftests/ublk/kublk.c

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22

tools/testing/selftests/ublk/kublk.h

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