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| author | Caleb Sander Mateos <csander@purestorage.com> | 2025-12-01 14:41:44 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-12-08 13:32:30 -0700 |
| commit | 87213b0d847cd300285b5545598e0548baeb5208 (patch) | |
| tree | 1c20faead1da51182d3e282885cb23e3c4b8cbaa /samples/rust/rust_driver_platform.rs | |
| parent | 0f45353dd48037af61f70df3468d25ca46afe909 (diff) | |
ublk: allow non-blocking ctrl cmds in IO_URING_F_NONBLOCK issue
Handling most of the ublksrv_ctrl_cmd opcodes require locking a mutex,
so ublk_ctrl_uring_cmd() bails out with EAGAIN when called with the
IO_URING_F_NONBLOCK issue flag. However, several opcodes can be handled
without blocking:
- UBLK_CMD_GET_QUEUE_AFFINITY
- UBLK_CMD_GET_DEV_INFO
- UBLK_CMD_GET_DEV_INFO2
- UBLK_U_CMD_GET_FEATURES
Handle these opcodes synchronously instead of returning EAGAIN so
io_uring doesn't need to issue the command via the worker thread pool.
Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'samples/rust/rust_driver_platform.rs')
0 files changed, 0 insertions, 0 deletions