include/linux/syscall_user_dispatch.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2020 Collabora Ltd.
   4  */
   5 #ifndef _SYSCALL_USER_DISPATCH_H
   6 #define _SYSCALL_USER_DISPATCH_H
   7
   8 #include <linux/thread_info.h>
   9
  10 #ifdef CONFIG_GENERIC_ENTRY
  11
  12 struct syscall_user_dispatch {
  13         char __user     *selector;
  14         unsigned long   offset;
  15         unsigned long   len;
  16         bool            on_dispatch;
  17 };
  18
  19 int set_syscall_user_dispatch(unsigned long mode, unsigned long offset,
  20                               unsigned long len, char __user *selector);
  21
  22 #define clear_syscall_work_syscall_user_dispatch(tsk) \
  23         clear_task_syscall_work(tsk, SYSCALL_USER_DISPATCH)
  24
  25 int syscall_user_dispatch_get_config(struct task_struct *task, unsigned long size,
  26                                      void __user *data);
  27
  28 int syscall_user_dispatch_set_config(struct task_struct *task, unsigned long size,
  29                                      void __user *data);
  30
  31 #else
  32 struct syscall_user_dispatch {};
  33
  34 static inline int set_syscall_user_dispatch(unsigned long mode, unsigned long offset,
  35                                             unsigned long len, char __user *selector)
  36 {
  37         return -EINVAL;
  38 }
  39
  40 static inline void clear_syscall_work_syscall_user_dispatch(struct task_struct *tsk)
  41 {
  42 }
  43
  44 static inline int syscall_user_dispatch_get_config(struct task_struct *task,
  45                                                    unsigned long size, void __user *data)
  46 {
  47         return -EINVAL;
  48 }
  49
  50 static inline int syscall_user_dispatch_set_config(struct task_struct *task,
  51                                                    unsigned long size, void __user *data)
  52 {
  53         return -EINVAL;
  54 }
  55
  56 #endif /* CONFIG_GENERIC_ENTRY */
  57
  58 #endif /* _SYSCALL_USER_DISPATCH_H */