diff options
| author | Jens Axboe <axboe@kernel.dk> | 2019-10-15 16:48:15 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-10-29 10:22:48 -0600 |
| commit | a41525ab2e75987e809926352ebc6f1397da900e (patch) | |
| tree | a4f80ed1e7b9705abd0c458f73f6dc1063cad1f3 /fs | |
| parent | ba5290ccb6b57fc5e274ae46d051fba1f0ece262 (diff) | |
io_uring: add support for absolute timeouts
This is a pretty trivial addition on top of the relative timeouts
we have now, but it's handy for ensuring tighter timing for those
that are building scheduling primitives on top of io_uring.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/io_uring.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 6bbca3d58941..2fc6809bc3a9 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -1978,13 +1978,17 @@ static int io_timeout(struct io_kiocb *req, const struct io_uring_sqe *sqe) unsigned count; struct io_ring_ctx *ctx = req->ctx; struct list_head *entry; + enum hrtimer_mode mode; struct timespec64 ts; unsigned span = 0; + unsigned flags; if (unlikely(ctx->flags & IORING_SETUP_IOPOLL)) return -EINVAL; - if (sqe->flags || sqe->ioprio || sqe->buf_index || sqe->timeout_flags || - sqe->len != 1) + if (sqe->flags || sqe->ioprio || sqe->buf_index || sqe->len != 1) + return -EINVAL; + flags = READ_ONCE(sqe->timeout_flags); + if (flags & ~IORING_TIMEOUT_ABS) return -EINVAL; if (get_timespec64(&ts, u64_to_user_ptr(sqe->addr))) @@ -2042,10 +2046,13 @@ static int io_timeout(struct io_kiocb *req, const struct io_uring_sqe *sqe) list_add(&req->list, entry); spin_unlock_irq(&ctx->completion_lock); - hrtimer_init(&req->timeout.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + if (flags & IORING_TIMEOUT_ABS) + mode = HRTIMER_MODE_ABS; + else + mode = HRTIMER_MODE_REL; + hrtimer_init(&req->timeout.timer, CLOCK_MONOTONIC, mode); req->timeout.timer.function = io_timeout_fn; - hrtimer_start(&req->timeout.timer, timespec64_to_ktime(ts), - HRTIMER_MODE_REL); + hrtimer_start(&req->timeout.timer, timespec64_to_ktime(ts), mode); return 0; } |