1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef _LINUX_IO_URING_H
3#define _LINUX_IO_URING_H
4
5#include <linux/sched.h>
6#include <linux/xarray.h>
7
8enum io_uring_cmd_flags {
9 IO_URING_F_COMPLETE_DEFER = 1,
10 IO_URING_F_UNLOCKED = 2,
11 /* int's last bit, sign checks are usually faster than a bit test */
12 IO_URING_F_NONBLOCK = INT_MIN,
13
14 /* ctx state flags, for URING_CMD */
15 IO_URING_F_SQE128 = 4,
16 IO_URING_F_CQE32 = 8,
17 IO_URING_F_IOPOLL = 16,
18};
19
20struct io_uring_cmd {
21 struct file *file;
22 const void *cmd;
23 /* callback to defer completions to task context */
24 void (*task_work_cb)(struct io_uring_cmd *cmd);
25 u32 cmd_op;
26 u32 pad;
27 u8 pdu[32]; /* available inline for free use */
28};
29
30#if defined(CONFIG_IO_URING)
31void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2);
32void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
33 void (*task_work_cb)(struct io_uring_cmd *));
34struct sock *io_uring_get_socket(struct file *file);
35void __io_uring_cancel(bool cancel_all);
36void __io_uring_free(struct task_struct *tsk);
37void io_uring_unreg_ringfd(void);
38const char *io_uring_get_opcode(u8 opcode);
39
40static inline void io_uring_files_cancel(void)
41{
42 if (current->io_uring) {
43 io_uring_unreg_ringfd();
44 __io_uring_cancel(false);
45 }
46}
47static inline void io_uring_task_cancel(void)
48{
49 if (current->io_uring)
50 __io_uring_cancel(true);
51}
52static inline void io_uring_free(struct task_struct *tsk)
53{
54 if (tsk->io_uring)
55 __io_uring_free(tsk);
56}
57#else
58static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret,
59 ssize_t ret2)
60{
61}
62static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
63 void (*task_work_cb)(struct io_uring_cmd *))
64{
65}
66static inline struct sock *io_uring_get_socket(struct file *file)
67{
68 return NULL;
69}
70static inline void io_uring_task_cancel(void)
71{
72}
73static inline void io_uring_files_cancel(void)
74{
75}
76static inline void io_uring_free(struct task_struct *tsk)
77{
78}
79static inline const char *io_uring_get_opcode(u8 opcode)
80{
81 return "";
82}
83#endif
84
85#endif
86

source code of linux/include/linux/io_uring.h