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 8 enum io_uring_cmd_flags { 9 IO_URING_F_COMPLETE_DEFER = 1, 10 IO_URING_F_UNLOCKED = 2, 11 /* int's last bit, sign checks are usually faster than a bit test */ 12 IO_URING_F_NONBLOCK = INT_MIN, 13 14 /* ctx state flags, for URING_CMD */ 15 IO_URING_F_SQE128 = 4, 16 IO_URING_F_CQE32 = 8, 17 IO_URING_F_IOPOLL = 16, 18 }; 19 20 struct io_uring_cmd { 21 struct file *file; 22 const void *cmd; 23 union { 24 /* callback to defer completions to task context */ 25 void (*task_work_cb)(struct io_uring_cmd *cmd); 26 /* used for polled completion */ 27 void *cookie; 28 }; 29 u32 cmd_op; 30 u32 pad; 31 u8 pdu[32]; /* available inline for free use */ 32 }; 33 34 #if defined(CONFIG_IO_URING) 35 void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2); 36 void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, 37 void (*task_work_cb)(struct io_uring_cmd *)); 38 struct sock *io_uring_get_socket(struct file *file); 39 void __io_uring_cancel(bool cancel_all); 40 void __io_uring_free(struct task_struct *tsk); 41 void io_uring_unreg_ringfd(void); 42 const char *io_uring_get_opcode(u8 opcode); 43 44 static inline void io_uring_files_cancel(void) 45 { 46 if (current->io_uring) { 47 io_uring_unreg_ringfd(); 48 __io_uring_cancel(false); 49 } 50 } 51 static inline void io_uring_task_cancel(void) 52 { 53 if (current->io_uring) 54 __io_uring_cancel(true); 55 } 56 static inline void io_uring_free(struct task_struct *tsk) 57 { 58 if (tsk->io_uring) 59 __io_uring_free(tsk); 60 } 61 #else 62 static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, 63 ssize_t ret2) 64 { 65 } 66 static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, 67 void (*task_work_cb)(struct io_uring_cmd *)) 68 { 69 } 70 static inline struct sock *io_uring_get_socket(struct file *file) 71 { 72 return NULL; 73 } 74 static inline void io_uring_task_cancel(void) 75 { 76 } 77 static inline void io_uring_files_cancel(void) 78 { 79 } 80 static inline void io_uring_free(struct task_struct *tsk) 81 { 82 } 83 static inline const char *io_uring_get_opcode(u8 opcode) 84 { 85 return ""; 86 } 87 #endif 88 89 #endif 90