io_uring: add support for 128-byte SQEs

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Normal SQEs are 64-bytes in length, which is fine for all the commands
we support. However, in preparation for supporting passthrough IO,
provide an option for setting up a ring with 128-byte SQEs.

We continue to use the same type for io_uring_sqe, it's marked and
commented with a zero sized array pad at the end. This provides up
to 80 bytes of data for a passthrough command - 64 bytes for the
extra added data, and 16 bytes available at the end of the existing
SQE.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

Jens Axboe 2022-03-31 19:27:52 -06:00

parent b5ba65df47

commit ebdeb7c01d

2 changed files with 19 additions and 3 deletions

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14

fs/io_uring.c

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8

include/uapi/linux/io_uring.h

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