Linux kernel mirror (for testing)
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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#include <uapi/linux/io_uring.h>
8
9enum io_uring_cmd_flags {
10 IO_URING_F_COMPLETE_DEFER = 1,
11 IO_URING_F_UNLOCKED = 2,
12 /* int's last bit, sign checks are usually faster than a bit test */
13 IO_URING_F_NONBLOCK = INT_MIN,
14
15 /* ctx state flags, for URING_CMD */
16 IO_URING_F_SQE128 = 4,
17 IO_URING_F_CQE32 = 8,
18 IO_URING_F_IOPOLL = 16,
19};
20
21struct io_uring_cmd {
22 struct file *file;
23 const void *cmd;
24 union {
25 /* callback to defer completions to task context */
26 void (*task_work_cb)(struct io_uring_cmd *cmd);
27 /* used for polled completion */
28 void *cookie;
29 };
30 u32 cmd_op;
31 u32 flags;
32 u8 pdu[32]; /* available inline for free use */
33};
34
35#if defined(CONFIG_IO_URING)
36int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
37 struct iov_iter *iter, void *ioucmd);
38void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2);
39void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
40 void (*task_work_cb)(struct io_uring_cmd *));
41struct sock *io_uring_get_socket(struct file *file);
42void __io_uring_cancel(bool cancel_all);
43void __io_uring_free(struct task_struct *tsk);
44void io_uring_unreg_ringfd(void);
45const char *io_uring_get_opcode(u8 opcode);
46
47static inline void io_uring_files_cancel(void)
48{
49 if (current->io_uring) {
50 io_uring_unreg_ringfd();
51 __io_uring_cancel(false);
52 }
53}
54static inline void io_uring_task_cancel(void)
55{
56 if (current->io_uring)
57 __io_uring_cancel(true);
58}
59static inline void io_uring_free(struct task_struct *tsk)
60{
61 if (tsk->io_uring)
62 __io_uring_free(tsk);
63}
64#else
65static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
66 struct iov_iter *iter, void *ioucmd)
67{
68 return -EOPNOTSUPP;
69}
70static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret,
71 ssize_t ret2)
72{
73}
74static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
75 void (*task_work_cb)(struct io_uring_cmd *))
76{
77}
78static inline struct sock *io_uring_get_socket(struct file *file)
79{
80 return NULL;
81}
82static inline void io_uring_task_cancel(void)
83{
84}
85static inline void io_uring_files_cancel(void)
86{
87}
88static inline void io_uring_free(struct task_struct *tsk)
89{
90}
91static inline const char *io_uring_get_opcode(u8 opcode)
92{
93 return "";
94}
95#endif
96
97#endif