io_uring/tctx.h

   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 }