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 static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe) 40 { 41 return sqe->cmd; 42 } 43 44 #if defined(CONFIG_IO_URING) 45 int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, 46 struct iov_iter *iter, void *ioucmd); 47 void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2, 48 unsigned issue_flags); 49 struct sock *io_uring_get_socket(struct file *file); 50 void __io_uring_cancel(bool cancel_all); 51 void __io_uring_free(struct task_struct *tsk); 52 void io_uring_unreg_ringfd(void); 53 const char *io_uring_get_opcode(u8 opcode); 54 void __io_uring_cmd_do_in_task(struct io_uring_cmd *ioucmd, 55 void (*task_work_cb)(struct io_uring_cmd *, unsigned), 56 unsigned flags); 57 /* users should follow semantics of IOU_F_TWQ_LAZY_WAKE */ 58 void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd, 59 void (*task_work_cb)(struct io_uring_cmd *, unsigned)); 60 61 static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, 62 void (*task_work_cb)(struct io_uring_cmd *, unsigned)) 63 { 64 __io_uring_cmd_do_in_task(ioucmd, task_work_cb, 0); 65 } 66 67 static inline void io_uring_files_cancel(void) 68 { 69 if (current->io_uring) { 70 io_uring_unreg_ringfd(); 71 __io_uring_cancel(false); 72 } 73 } 74 static inline void io_uring_task_cancel(void) 75 { 76 if (current->io_uring) 77 __io_uring_cancel(true); 78 } 79 static inline void io_uring_free(struct task_struct *tsk) 80 { 81 if (tsk->io_uring) 82 __io_uring_free(tsk); 83 } 84 int io_uring_cmd_sock(struct io_uring_cmd *cmd, unsigned int issue_flags); 85 #else 86 static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, 87 struct iov_iter *iter, void *ioucmd) 88 { 89 return -EOPNOTSUPP; 90 } 91 static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, 92 ssize_t ret2, unsigned issue_flags) 93 { 94 } 95 static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, 96 void (*task_work_cb)(struct io_uring_cmd *, unsigned)) 97 { 98 } 99 static inline void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd, 100 void (*task_work_cb)(struct io_uring_cmd *, unsigned)) 101 { 102 } 103 static inline struct sock *io_uring_get_socket(struct file *file) 104 { 105 return NULL; 106 } 107 static inline void io_uring_task_cancel(void) 108 { 109 } 110 static inline void io_uring_files_cancel(void) 111 { 112 } 113 static inline void io_uring_free(struct task_struct *tsk) 114 { 115 } 116 static inline const char *io_uring_get_opcode(u8 opcode) 117 { 118 return ""; 119 } 120 static inline int io_uring_cmd_sock(struct io_uring_cmd *cmd, 121 unsigned int issue_flags) 122 { 123 return -EOPNOTSUPP; 124 } 125 #endif 126 127 #endif 128