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| author | Jens Axboe <axboe@kernel.dk> | 2023-07-11 00:14:37 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-09-21 20:04:45 +0200 |
| commit | f31ecf671ddc498f20219453395794ff2383e06b (patch) | |
| tree | 41835b9eb01ecf14ee7f16e428158601b34e4748 /sound | |
| parent | exit: add internal include file with helpers (diff) | |
| download | linux-f31ecf671ddc498f20219453395794ff2383e06b.tar.xz linux-f31ecf671ddc498f20219453395794ff2383e06b.zip | |
io_uring: add IORING_OP_WAITID support
This adds support for an async version of waitid(2), in a fully async
version. If an event isn't immediately available, wait for a callback
to trigger a retry.
The format of the sqe is as follows:
sqe->len The 'which', the idtype being queried/waited for.
sqe->fd The 'pid' (or id) being waited for.
sqe->file_index The 'options' being set.
sqe->addr2 A pointer to siginfo_t, if any, being filled in.
buf_index, add3, and waitid_flags are reserved/unused for now.
waitid_flags will be used for options for this request type. One
interesting use case may be to add multi-shot support, so that the
request stays armed and posts a notification every time a monitored
process state change occurs.
Note that this does not support rusage, on Arnd's recommendation.
See the waitid(2) man page for details on the arguments.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'sound')
0 files changed, 0 insertions, 0 deletions