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io_uring: keep ltimeouts in a list 

A preparation patch. Keep all queued linked timeout in a list, so they
may be found and updated.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-08-28 19:54:38 -06:00 committed by Jens Axboe
parent 50c1df2b56
commit ef9dd63708
1 changed files with 7 additions and 0 deletions
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7
fs/io_uring.c
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@ -375,6 +375,7 @@ struct io_ring_ctx {
struct io_submit_state submit_state;
struct list_head timeout_list;
struct list_head ltimeout_list;
struct list_head cq_overflow_list;
struct xarray io_buffers;
struct xarray personalities;
@ -1277,6 +1278,7 @@ static struct io_ring_ctx *io_ring_ctx_alloc(struct io_uring_params *p)
INIT_LIST_HEAD(&ctx->iopoll_list);
INIT_LIST_HEAD(&ctx->defer_list);
INIT_LIST_HEAD(&ctx->timeout_list);
INIT_LIST_HEAD(&ctx->ltimeout_list);
spin_lock_init(&ctx->rsrc_ref_lock);
INIT_LIST_HEAD(&ctx->rsrc_ref_list);
INIT_DELAYED_WORK(&ctx->rsrc_put_work, io_rsrc_put_work);
@ -1966,6 +1968,7 @@ static bool io_kill_linked_timeout(struct io_kiocb *req)
io_remove_next_linked(req);
link->timeout.head = NULL;
if (hrtimer_try_to_cancel(&io->timer) != -1) {
list_del(&link->timeout.list);
io_cqring_fill_event(link->ctx, link->user_data,
-ECANCELED, 0);
io_put_req_deferred(link);
@ -5830,6 +5833,7 @@ static int io_timeout_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe,
if (hweight32(flags & IORING_TIMEOUT_CLOCK_MASK) > 1)
return -EINVAL;
INIT_LIST_HEAD(&req->timeout.list);
req->timeout.off = off;
if (unlikely(off && !req->ctx->off_timeout_used))
req->ctx->off_timeout_used = true;
@ -6585,6 +6589,7 @@ static enum hrtimer_restart io_link_timeout_fn(struct hrtimer *timer)
if (!req_ref_inc_not_zero(prev))
prev = NULL;
}
list_del(&req->timeout.list);
req->timeout.prev = prev;
spin_unlock_irqrestore(&ctx->timeout_lock, flags);
@ -6608,6 +6613,7 @@ static void io_queue_linked_timeout(struct io_kiocb *req)
data->timer.function = io_link_timeout_fn;
hrtimer_start(&data->timer, timespec64_to_ktime(data->ts),
data->mode);
list_add_tail(&req->timeout.list, &ctx->ltimeout_list);
}
spin_unlock_irq(&ctx->timeout_lock);
/* drop submission reference */
@ -8900,6 +8906,7 @@ static void io_ring_ctx_free(struct io_ring_ctx *ctx)
sock_release(ctx->ring_sock);
}
#endif
WARN_ON_ONCE(!list_empty(&ctx->ltimeout_list));
io_mem_free(ctx->rings);
io_mem_free(ctx->sq_sqes);