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io_uring: add io_add_aux_cqe() helper

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This helper will post a CQE, and can be called from task_work where we
now that the ctx is already properly locked and that deferred
completions will get flushed later on.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2024-06-06 10:28:26 -06:00
parent c3ac76f9ca
commit f33096a3c9
2 changed files with 24 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

27
io_uring/io_uring.c
View file

@ -801,19 +801,38 @@ static bool io_fill_cqe_aux(struct io_ring_ctx *ctx, u64 user_data, s32 res,
return false;
}
static bool __io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res,
u32 cflags)
{
bool filled;
filled = io_fill_cqe_aux(ctx, user_data, res, cflags);
if (!filled)
filled = io_cqring_event_overflow(ctx, user_data, res, cflags, 0, 0);
return filled;
}
bool io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags)
{
bool filled;
io_cq_lock(ctx);
filled = io_fill_cqe_aux(ctx, user_data, res, cflags);
if (!filled)
filled = io_cqring_event_overflow(ctx, user_data, res, cflags, 0, 0);
filled = __io_post_aux_cqe(ctx, user_data, res, cflags);
io_cq_unlock_post(ctx);
return filled;
}
/*
* Must be called from inline task_work so we now a flush will happen later,
* and obviously with ctx->uring_lock held (tw always has that).
*/
void io_add_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags)
{
__io_post_aux_cqe(ctx, user_data, res, cflags);
ctx->submit_state.cq_flush = true;
}
/*
* A helper for multishot requests posting additional CQEs.
* Should only be used from a task_work including IO_URING_F_MULTISHOT.

1
io_uring/io_uring.h
View file

@ -65,6 +65,7 @@ bool io_cqe_cache_refill(struct io_ring_ctx *ctx, bool overflow);
int io_run_task_work_sig(struct io_ring_ctx *ctx);
void io_req_defer_failed(struct io_kiocb *req, s32 res);
bool io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags);
void io_add_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags);
bool io_req_post_cqe(struct io_kiocb *req, s32 res, u32 cflags);
void __io_commit_cqring_flush(struct io_ring_ctx *ctx);