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 /* the request is executed from poll, it should not be freed */
13 IO_URING_F_MULTISHOT = 4,
14 /* executed by io-wq */
15 IO_URING_F_IOWQ = 8,
16 /* int's last bit, sign checks are usually faster than a bit test */
17 IO_URING_F_NONBLOCK = INT_MIN,
18
19 /* ctx state flags, for URING_CMD */
20 IO_URING_F_SQE128 = (1 << 8),
21 IO_URING_F_CQE32 = (1 << 9),
22 IO_URING_F_IOPOLL = (1 << 10),
23};
24
25struct io_uring_cmd {
26 struct file *file;
27 const void *cmd;
28 union {
29 /* callback to defer completions to task context */
30 void (*task_work_cb)(struct io_uring_cmd *cmd, unsigned);
31 /* used for polled completion */
32 void *cookie;
33 };
34 u32 cmd_op;
35 u32 flags;
36 u8 pdu[32]; /* available inline for free use */
37};
38
39#if defined(CONFIG_IO_URING)
40int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
41 struct iov_iter *iter, void *ioucmd);
42void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2,
43 unsigned issue_flags);
44void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
45 void (*task_work_cb)(struct io_uring_cmd *, unsigned));
46struct sock *io_uring_get_socket(struct file *file);
47void __io_uring_cancel(bool cancel_all);
48void __io_uring_free(struct task_struct *tsk);
49void io_uring_unreg_ringfd(void);
50const char *io_uring_get_opcode(u8 opcode);
51
52static inline void io_uring_files_cancel(void)
53{
54 if (current->io_uring) {
55 io_uring_unreg_ringfd();
56 __io_uring_cancel(false);
57 }
58}
59static inline void io_uring_task_cancel(void)
60{
61 if (current->io_uring)
62 __io_uring_cancel(true);
63}
64static inline void io_uring_free(struct task_struct *tsk)
65{
66 if (tsk->io_uring)
67 __io_uring_free(tsk);
68}
69#else
70static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
71 struct iov_iter *iter, void *ioucmd)
72{
73 return -EOPNOTSUPP;
74}
75static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret,
76 ssize_t ret2, unsigned issue_flags)
77{
78}
79static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
80 void (*task_work_cb)(struct io_uring_cmd *, unsigned))
81{
82}
83static inline struct sock *io_uring_get_socket(struct file *file)
84{
85 return NULL;
86}
87static inline void io_uring_task_cancel(void)
88{
89}
90static inline void io_uring_files_cancel(void)
91{
92}
93static inline void io_uring_free(struct task_struct *tsk)
94{
95}
96static inline const char *io_uring_get_opcode(u8 opcode)
97{
98 return "";
99}
100#endif
101
102#endif