1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _LINUX_IO_URING_H
3 #define _LINUX_IO_URING_H
5 #include <linux/sched.h>
6 #include <linux/xarray.h>
7 #include <uapi/linux/io_uring.h>
9 enum 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 */
16 /* int's last bit, sign checks are usually faster than a bit test */
17 IO_URING_F_NONBLOCK = INT_MIN,
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),
24 /* set when uring wants to cancel a previously issued command */
25 IO_URING_F_CANCEL = (1 << 11),
28 /* only top 8 bits of sqe->uring_cmd_flags for kernel internal use */
29 #define IORING_URING_CMD_CANCELABLE (1U << 30)
30 #define IORING_URING_CMD_POLLED (1U << 31)
34 const struct io_uring_sqe *sqe;
36 /* callback to defer completions to task context */
37 void (*task_work_cb)(struct io_uring_cmd *cmd, unsigned);
38 /* used for polled completion */
43 u8 pdu[32]; /* available inline for free use */
46 static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe)
51 #if defined(CONFIG_IO_URING)
52 int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
53 struct iov_iter *iter, void *ioucmd);
54 void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2,
55 unsigned issue_flags);
56 struct sock *io_uring_get_socket(struct file *file);
57 void __io_uring_cancel(bool cancel_all);
58 void __io_uring_free(struct task_struct *tsk);
59 void io_uring_unreg_ringfd(void);
60 const char *io_uring_get_opcode(u8 opcode);
61 void __io_uring_cmd_do_in_task(struct io_uring_cmd *ioucmd,
62 void (*task_work_cb)(struct io_uring_cmd *, unsigned),
64 /* users should follow semantics of IOU_F_TWQ_LAZY_WAKE */
65 void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd,
66 void (*task_work_cb)(struct io_uring_cmd *, unsigned));
68 static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
69 void (*task_work_cb)(struct io_uring_cmd *, unsigned))
71 __io_uring_cmd_do_in_task(ioucmd, task_work_cb, 0);
74 static inline void io_uring_files_cancel(void)
76 if (current->io_uring) {
77 io_uring_unreg_ringfd();
78 __io_uring_cancel(false);
81 static inline void io_uring_task_cancel(void)
83 if (current->io_uring)
84 __io_uring_cancel(true);
86 static inline void io_uring_free(struct task_struct *tsk)
91 int io_uring_cmd_sock(struct io_uring_cmd *cmd, unsigned int issue_flags);
92 void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd,
93 unsigned int issue_flags);
94 struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd);
96 static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
97 struct iov_iter *iter, void *ioucmd)
101 static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret,
102 ssize_t ret2, unsigned issue_flags)
105 static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
106 void (*task_work_cb)(struct io_uring_cmd *, unsigned))
109 static inline void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd,
110 void (*task_work_cb)(struct io_uring_cmd *, unsigned))
113 static inline struct sock *io_uring_get_socket(struct file *file)
117 static inline void io_uring_task_cancel(void)
120 static inline void io_uring_files_cancel(void)
123 static inline void io_uring_free(struct task_struct *tsk)
126 static inline const char *io_uring_get_opcode(u8 opcode)
130 static inline int io_uring_cmd_sock(struct io_uring_cmd *cmd,
131 unsigned int issue_flags)
135 static inline void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd,
136 unsigned int issue_flags)
139 static inline struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd)