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99c1e4eb6a
Add UBLK_F_AUTO_BUF_REG for supporting to register buffer automatically to local io_uring context with provided buffer index. Add UAPI structure `struct ublk_auto_buf_reg` for holding user parameter to register request buffer automatically, one 'flags' field is defined, and there is still 32bit available for future extension, such as, adding one io_ring FD field for registering buffer to external io_uring. `struct ublk_auto_buf_reg` is populated from ublk uring_cmd's sqe->addr, and all existing ublk commands are data-less, so it is just fine to reuse sqe->addr for this purpose. Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20250520045455.515691-4-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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