static int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_ring_ctx *ctx = req->ctx;
+ u64 sqe_addr = req->cancel.addr;
+ struct io_tctx_node *node;
+ int ret;
- io_async_find_and_cancel(ctx, req, req->cancel.addr, 0);
+ /* tasks should wait for their io-wq threads, so safe w/o sync */
+ ret = io_async_cancel_one(req->task->io_uring, sqe_addr, ctx);
+ spin_lock_irq(&ctx->completion_lock);
+ if (ret != -ENOENT)
+ goto done;
+ ret = io_timeout_cancel(ctx, sqe_addr);
+ if (ret != -ENOENT)
+ goto done;
+ ret = io_poll_cancel(ctx, sqe_addr);
+ if (ret != -ENOENT)
+ goto done;
+ spin_unlock_irq(&ctx->completion_lock);
+
+ /* slow path, try all io-wq's */
+ io_ring_submit_lock(ctx, !(issue_flags & IO_URING_F_NONBLOCK));
+ ret = -ENOENT;
+ list_for_each_entry(node, &ctx->tctx_list, ctx_node) {
+ struct io_uring_task *tctx = node->task->io_uring;
+
+ if (!tctx || !tctx->io_wq)
+ continue;
+ ret = io_async_cancel_one(tctx, req->cancel.addr, ctx);
+ if (ret != -ENOENT)
+ break;
+ }
+ io_ring_submit_unlock(ctx, !(issue_flags & IO_URING_F_NONBLOCK));
+
+ spin_lock_irq(&ctx->completion_lock);
+done:
+ io_cqring_fill_event(req, ret);
+ io_commit_cqring(ctx);
+ spin_unlock_irq(&ctx->completion_lock);
+ io_cqring_ev_posted(ctx);
+
+ if (ret < 0)
+ req_set_fail_links(req);
+ io_put_req(req);
return 0;
}