| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| #ifndef _LINUX_IO_URING_CMD_H |
| #define _LINUX_IO_URING_CMD_H |
| |
| #include <uapi/linux/io_uring.h> |
| #include <linux/io_uring_types.h> |
| |
| /* only top 8 bits of sqe->uring_cmd_flags for kernel internal use */ |
| #define IORING_URING_CMD_CANCELABLE (1U << 30) |
| |
| struct io_uring_cmd { |
| struct file *file; |
| const struct io_uring_sqe *sqe; |
| /* callback to defer completions to task context */ |
| void (*task_work_cb)(struct io_uring_cmd *cmd, unsigned); |
| u32 cmd_op; |
| u32 flags; |
| u8 pdu[32]; /* available inline for free use */ |
| }; |
| |
| static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe) |
| { |
| return sqe->cmd; |
| } |
| |
| #if defined(CONFIG_IO_URING) |
| int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, |
| struct iov_iter *iter, void *ioucmd); |
| void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2, |
| unsigned issue_flags); |
| void __io_uring_cmd_do_in_task(struct io_uring_cmd *ioucmd, |
| void (*task_work_cb)(struct io_uring_cmd *, unsigned), |
| unsigned flags); |
| |
| void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd, |
| unsigned int issue_flags); |
| |
| #else |
| static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, |
| struct iov_iter *iter, void *ioucmd) |
| { |
| return -EOPNOTSUPP; |
| } |
| static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, |
| ssize_t ret2, unsigned issue_flags) |
| { |
| } |
| static inline void __io_uring_cmd_do_in_task(struct io_uring_cmd *ioucmd, |
| void (*task_work_cb)(struct io_uring_cmd *, unsigned), |
| unsigned flags) |
| { |
| } |
| static inline void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd, |
| unsigned int issue_flags) |
| { |
| } |
| #endif |
| |
| /* users must follow the IOU_F_TWQ_LAZY_WAKE semantics */ |
| static inline void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd, |
| void (*task_work_cb)(struct io_uring_cmd *, unsigned)) |
| { |
| __io_uring_cmd_do_in_task(ioucmd, task_work_cb, IOU_F_TWQ_LAZY_WAKE); |
| } |
| |
| static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, |
| void (*task_work_cb)(struct io_uring_cmd *, unsigned)) |
| { |
| __io_uring_cmd_do_in_task(ioucmd, task_work_cb, 0); |
| } |
| |
| static inline struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd) |
| { |
| return cmd_to_io_kiocb(cmd)->task; |
| } |
| |
| #endif /* _LINUX_IO_URING_CMD_H */ |