diff options
Diffstat (limited to 'include/linux/io_uring/cmd.h')
-rw-r--r-- | include/linux/io_uring/cmd.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/include/linux/io_uring/cmd.h b/include/linux/io_uring/cmd.h new file mode 100644 index 000000000000..62fcfaf6fcc9 --- /dev/null +++ b/include/linux/io_uring/cmd.h @@ -0,0 +1,81 @@ +/* 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) +#define IORING_URING_CMD_POLLED (1U << 31) + +struct io_uring_cmd { + struct file *file; + const struct io_uring_sqe *sqe; + union { + /* callback to defer completions to task context */ + void (*task_work_cb)(struct io_uring_cmd *cmd, unsigned); + /* used for polled completion */ + void *cookie; + }; + 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); +/* users should follow semantics of IOU_F_TWQ_LAZY_WAKE */ +void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd, + void (*task_work_cb)(struct io_uring_cmd *, unsigned)); + +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); +} + +void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd, + unsigned int issue_flags); +struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd); + +#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_complete_in_task(struct io_uring_cmd *ioucmd, + void (*task_work_cb)(struct io_uring_cmd *, unsigned)) +{ +} +static inline void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd, + void (*task_work_cb)(struct io_uring_cmd *, unsigned)) +{ +} +static inline void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd, + unsigned int issue_flags) +{ +} +static inline struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd) +{ + return NULL; +} +#endif + +#endif /* _LINUX_IO_URING_CMD_H */ |