/* SPDX-License-Identifier: GPL-2.0-or-later */ #ifndef _LINUX_IO_URING_H #define _LINUX_IO_URING_H #include #include #include enum io_uring_cmd_flags { IO_URING_F_COMPLETE_DEFER = 1, IO_URING_F_UNLOCKED = 2, /* int's last bit, sign checks are usually faster than a bit test */ IO_URING_F_NONBLOCK = INT_MIN, /* ctx state flags, for URING_CMD */ IO_URING_F_SQE128 = 4, IO_URING_F_CQE32 = 8, IO_URING_F_IOPOLL = 16, /* the request is executed from poll, it should not be freed */ IO_URING_F_MULTISHOT = 32, }; struct io_uring_cmd { struct file *file; const void *cmd; 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 */ }; #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_complete_in_task(struct io_uring_cmd *ioucmd, void (*task_work_cb)(struct io_uring_cmd *, unsigned)); struct sock *io_uring_get_socket(struct file *file); void __io_uring_cancel(bool cancel_all); void __io_uring_free(struct task_struct *tsk); void io_uring_unreg_ringfd(void); const char *io_uring_get_opcode(u8 opcode); static inline void io_uring_files_cancel(void) { if (current->io_uring) { io_uring_unreg_ringfd(); __io_uring_cancel(false); } } static inline void io_uring_task_cancel(void) { if (current->io_uring) __io_uring_cancel(true); } static inline void io_uring_free(struct task_struct *tsk) { if (tsk->io_uring) __io_uring_free(tsk); } #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 struct sock *io_uring_get_socket(struct file *file) { return NULL; } static inline void io_uring_task_cancel(void) { } static inline void io_uring_files_cancel(void) { } static inline void io_uring_free(struct task_struct *tsk) { } static inline const char *io_uring_get_opcode(u8 opcode) { return ""; } #endif #endif