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
8 enum 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
20 struct 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)
31 void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2);
32 void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
33 void (*task_work_cb)(struct io_uring_cmd *));
34 struct sock *io_uring_get_socket(struct file *file);
35 void __io_uring_cancel(bool cancel_all);
36 void __io_uring_free(struct task_struct *tsk);
37 void io_uring_unreg_ringfd(void);
38 const char *io_uring_get_opcode(u8 opcode);
39
io_uring_files_cancel(void)40 static 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 }
io_uring_task_cancel(void)47 static inline void io_uring_task_cancel(void)
48 {
49 if (current->io_uring)
50 __io_uring_cancel(true);
51 }
io_uring_free(struct task_struct * tsk)52 static inline void io_uring_free(struct task_struct *tsk)
53 {
54 if (tsk->io_uring)
55 __io_uring_free(tsk);
56 }
57 #else
io_uring_cmd_done(struct io_uring_cmd * cmd,ssize_t ret,ssize_t ret2)58 static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret,
59 ssize_t ret2)
60 {
61 }
io_uring_cmd_complete_in_task(struct io_uring_cmd * ioucmd,void (* task_work_cb)(struct io_uring_cmd *))62 static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
63 void (*task_work_cb)(struct io_uring_cmd *))
64 {
65 }
io_uring_get_socket(struct file * file)66 static inline struct sock *io_uring_get_socket(struct file *file)
67 {
68 return NULL;
69 }
io_uring_task_cancel(void)70 static inline void io_uring_task_cancel(void)
71 {
72 }
io_uring_files_cancel(void)73 static inline void io_uring_files_cancel(void)
74 {
75 }
io_uring_free(struct task_struct * tsk)76 static inline void io_uring_free(struct task_struct *tsk)
77 {
78 }
io_uring_get_opcode(u8 opcode)79 static inline const char *io_uring_get_opcode(u8 opcode)
80 {
81 return "";
82 }
83 #endif
84
85 #endif
86