1 // SPDX-License-Identifier: GPL-2.0
3 #include <linux/llist.h>
6 * Arbitrary limit, can be raised if need be
8 #define IO_RINGFD_REG_MAX 16
10 struct io_uring_task {
13 const struct io_ring_ctx *last;
15 struct file *registered_rings[IO_RINGFD_REG_MAX];
18 struct wait_queue_head wait;
20 atomic_t inflight_tracked;
21 struct percpu_counter inflight;
23 struct { /* task_work */
24 struct llist_head task_list;
25 struct callback_head task_work;
26 } ____cacheline_aligned_in_smp;
30 struct list_head ctx_node;
31 struct task_struct *task;
32 struct io_ring_ctx *ctx;
35 int io_uring_alloc_task_context(struct task_struct *task,
36 struct io_ring_ctx *ctx);
37 void io_uring_del_tctx_node(unsigned long index);
38 int __io_uring_add_tctx_node(struct io_ring_ctx *ctx, bool submitter);
39 void io_uring_clean_tctx(struct io_uring_task *tctx);
41 void io_uring_unreg_ringfd(void);
42 int io_ringfd_register(struct io_ring_ctx *ctx, void __user *__arg,
44 int io_ringfd_unregister(struct io_ring_ctx *ctx, void __user *__arg,
48 * Note that this task has used io_uring. We use it for cancelation purposes.
50 static inline int io_uring_add_tctx_node(struct io_ring_ctx *ctx)
52 struct io_uring_task *tctx = current->io_uring;
54 if (likely(tctx && tctx->last == ctx))
56 return __io_uring_add_tctx_node(ctx, true);