Line data    Source code

       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           0 : static inline int io_uring_add_tctx_node(struct io_ring_ctx *ctx)
      26             : {
      27           0 :         struct io_uring_task *tctx = current->io_uring;
      28             : 
      29           0 :         if (likely(tctx && tctx->last == ctx))
      30             :                 return 0;
      31             : 
      32           0 :         return __io_uring_add_tctx_node_from_submit(ctx);
      33             : }