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| author | Jens Axboe <axboe@kernel.dk> | 2023-07-11 01:14:37 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-09-21 21:04:45 +0300 |
| commit | f31ecf671ddc498f20219453395794ff2383e06b (patch) | |
| tree | 41835b9eb01ecf14ee7f16e428158601b34e4748 /include/linux/io_uring_types.h | |
| parent | 2e521a2064bf8b26cf178c0f7644a70ed1a512fa (diff) | |
| download | linux-f31ecf671ddc498f20219453395794ff2383e06b.tar.xz | |
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 'include/linux/io_uring_types.h')
| -rw-r--r-- | include/linux/io_uring_types.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/io_uring_types.h b/include/linux/io_uring_types.h index 13d19b9be9f4..fe1c5d4ec56c 100644 --- a/include/linux/io_uring_types.h +++ b/include/linux/io_uring_types.h @@ -313,6 +313,8 @@ struct io_ring_ctx { struct list_head cq_overflow_list; struct io_hash_table cancel_table; + struct hlist_head waitid_list; + const struct cred *sq_creds; /* cred used for __io_sq_thread() */ struct io_sq_data *sq_data; /* if using sq thread polling */ |