io_uring: sendzc with fixed buffers

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Allow zerocopy sends to use fixed buffers. There is an optimisation for
this case, the network layer don't need to reference the pages, see
SKBFL_MANAGED_FRAG_REFS, so io_uring have to ensure validity of fixed
buffers until the notifier is released.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/e1d8bd1b5934e541d90c1824eb4020ae3f5f43f3.1657643355.git.asml.silence@gmail.com
[axboe: fold in 32-bit pointer cast warning fix]
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2022-07-12 21:52:46 +01:00 • committed by Jens Axboe

parent 092aeedb75

commit 10c7d33ecd

2 changed files with 29 additions and 6 deletions

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6

include/uapi/linux/io_uring.h

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