1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _LINUX_IO_URING_CMD_H
3 #define _LINUX_IO_URING_CMD_H
4
5 #include <uapi/linux/io_uring.h>
6 #include <linux/io_uring_types.h>
7
8 /* only top 8 bits of sqe->uring_cmd_flags for kernel internal use */
9 #define IORING_URING_CMD_CANCELABLE (1U << 30)
10
11 struct io_uring_cmd {
12 struct file *file;
13 const struct io_uring_sqe *sqe;
14 /* callback to defer completions to task context */
15 void (*task_work_cb)(struct io_uring_cmd *cmd, unsigned);
16 u32 cmd_op;
17 u32 flags;
18 u8 pdu[32]; /* available inline for free use */
19 };
20
io_uring_sqe_cmd(const struct io_uring_sqe * sqe)21 static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe)
22 {
23 return sqe->cmd;
24 }
25
26 #if defined(CONFIG_IO_URING)
27 int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
28 struct iov_iter *iter, void *ioucmd);
29 void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2,
30 unsigned issue_flags);
31 void __io_uring_cmd_do_in_task(struct io_uring_cmd *ioucmd,
32 void (*task_work_cb)(struct io_uring_cmd *, unsigned),
33 unsigned flags);
34
35 void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd,
36 unsigned int issue_flags);
37
38 #else
io_uring_cmd_import_fixed(u64 ubuf,unsigned long len,int rw,struct iov_iter * iter,void * ioucmd)39 static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
40 struct iov_iter *iter, void *ioucmd)
41 {
42 return -EOPNOTSUPP;
43 }
io_uring_cmd_done(struct io_uring_cmd * cmd,ssize_t ret,ssize_t ret2,unsigned issue_flags)44 static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret,
45 ssize_t ret2, unsigned issue_flags)
46 {
47 }
__io_uring_cmd_do_in_task(struct io_uring_cmd * ioucmd,void (* task_work_cb)(struct io_uring_cmd *,unsigned),unsigned flags)48 static inline void __io_uring_cmd_do_in_task(struct io_uring_cmd *ioucmd,
49 void (*task_work_cb)(struct io_uring_cmd *, unsigned),
50 unsigned flags)
51 {
52 }
io_uring_cmd_mark_cancelable(struct io_uring_cmd * cmd,unsigned int issue_flags)53 static inline void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd,
54 unsigned int issue_flags)
55 {
56 }
57 #endif
58
59 /* users must follow the IOU_F_TWQ_LAZY_WAKE semantics */
io_uring_cmd_do_in_task_lazy(struct io_uring_cmd * ioucmd,void (* task_work_cb)(struct io_uring_cmd *,unsigned))60 static inline void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd,
61 void (*task_work_cb)(struct io_uring_cmd *, unsigned))
62 {
63 __io_uring_cmd_do_in_task(ioucmd, task_work_cb, IOU_F_TWQ_LAZY_WAKE);
64 }
65
io_uring_cmd_complete_in_task(struct io_uring_cmd * ioucmd,void (* task_work_cb)(struct io_uring_cmd *,unsigned))66 static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
67 void (*task_work_cb)(struct io_uring_cmd *, unsigned))
68 {
69 __io_uring_cmd_do_in_task(ioucmd, task_work_cb, 0);
70 }
71
io_uring_cmd_get_task(struct io_uring_cmd * cmd)72 static inline struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd)
73 {
74 return cmd_to_io_kiocb(cmd)->task;
75 }
76
77 #endif /* _LINUX_IO_URING_CMD_H */
78