1 // SPDX-License-Identifier: GPL-2.0
2
3 struct io_tctx_node {
4 struct list_head ctx_node;
5 struct task_struct *task;
6 struct io_ring_ctx *ctx;
7 };
8
9 int io_uring_alloc_task_context(struct task_struct *task,
10 struct io_ring_ctx *ctx);
11 void io_uring_del_tctx_node(unsigned long index);
12 int __io_uring_add_tctx_node(struct io_ring_ctx *ctx);
13 int __io_uring_add_tctx_node_from_submit(struct io_ring_ctx *ctx);
14 void io_uring_clean_tctx(struct io_uring_task *tctx);
15
16 void io_uring_unreg_ringfd(void);
17 int io_ringfd_register(struct io_ring_ctx *ctx, void __user *__arg,
18 unsigned nr_args);
19 int io_ringfd_unregister(struct io_ring_ctx *ctx, void __user *__arg,
20 unsigned nr_args);
21
22 /*
23 * Note that this task has used io_uring. We use it for cancelation purposes.
24 */
25 static inline int io_uring_add_tctx_node(struct io_ring_ctx *ctx)
26 {
27 struct io_uring_task *tctx = current->io_uring;
28
29 if (likely(tctx && tctx->last == ctx))
30 return 0;
31
32 return __io_uring_add_tctx_node_from_submit(ctx);
33 }
34
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