1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 #ifndef _LINUX_IO_URING_H 3 #define _LINUX_IO_URING_H 4 5 #include <linux/sched.h> 6 #include <linux/xarray.h> 7 #include <uapi/linux/io_uring.h> 8 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 */ 15 IO_URING_F_IOWQ = 8, 16 /* int's last bit, sign checks are usually faster than a bit test */ 17 IO_URING_F_NONBLOCK = INT_MIN, 18 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), 23 }; 24 25 struct io_uring_cmd { 26 struct file *file; 27 const struct io_uring_sqe *sqe; 28 union { 29 /* callback to defer completions to task context */ 30 void (*task_work_cb)(struct io_uring_cmd *cmd, unsigned); 31 /* used for polled completion */ 32 void *cookie; 33 }; 34 u32 cmd_op; 35 u32 flags; 36 u8 pdu[32]; /* available inline for free use */ 37 }; 38 39 #if defined(CONFIG_IO_URING) 40 int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, 41 struct iov_iter *iter, void *ioucmd); 42 void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2, 43 unsigned issue_flags); 44 void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, 45 void (*task_work_cb)(struct io_uring_cmd *, unsigned)); 46 struct sock *io_uring_get_socket(struct file *file); 47 void __io_uring_cancel(bool cancel_all); 48 void __io_uring_free(struct task_struct *tsk); 49 void io_uring_unreg_ringfd(void); 50 const char *io_uring_get_opcode(u8 opcode); 51 52 static inline void io_uring_files_cancel(void) 53 { 54 if (current->io_uring) { 55 io_uring_unreg_ringfd(); 56 __io_uring_cancel(false); 57 } 58 } 59 static inline void io_uring_task_cancel(void) 60 { 61 if (current->io_uring) 62 __io_uring_cancel(true); 63 } 64 static inline void io_uring_free(struct task_struct *tsk) 65 { 66 if (tsk->io_uring) 67 __io_uring_free(tsk); 68 } 69 70 static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe) 71 { 72 return sqe->cmd; 73 } 74 #else 75 static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, 76 struct iov_iter *iter, void *ioucmd) 77 { 78 return -EOPNOTSUPP; 79 } 80 static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, 81 ssize_t ret2, unsigned issue_flags) 82 { 83 } 84 static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, 85 void (*task_work_cb)(struct io_uring_cmd *, unsigned)) 86 { 87 } 88 static inline struct sock *io_uring_get_socket(struct file *file) 89 { 90 return NULL; 91 } 92 static inline void io_uring_task_cancel(void) 93 { 94 } 95 static inline void io_uring_files_cancel(void) 96 { 97 } 98 static inline void io_uring_free(struct task_struct *tsk) 99 { 100 } 101 static inline const char *io_uring_get_opcode(u8 opcode) 102 { 103 return ""; 104 } 105 #endif 106 107 #endif 108