include/linux/rv.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Runtime Verification.
   4  *
   5  * For futher information, see: kernel/trace/rv/rv.c.
   6  */
   7 #ifndef _LINUX_RV_H
   8 #define _LINUX_RV_H
   9
  10 #define MAX_DA_NAME_LEN 24
  11
  12 #ifdef CONFIG_RV
  13 /*
  14  * Deterministic automaton per-object variables.
  15  */
  16 struct da_monitor {
  17         bool            monitoring;
  18         unsigned int    curr_state;
  19 };
  20
  21 /*
  22  * Per-task RV monitors count. Nowadays fixed in RV_PER_TASK_MONITORS.
  23  * If we find justification for more monitors, we can think about
  24  * adding more or developing a dynamic method. So far, none of
  25  * these are justified.
  26  */
  27 #define RV_PER_TASK_MONITORS            1
  28 #define RV_PER_TASK_MONITOR_INIT        (RV_PER_TASK_MONITORS)
  29
  30 /*
  31  * Futher monitor types are expected, so make this a union.
  32  */
  33 union rv_task_monitor {
  34         struct da_monitor da_mon;
  35 };
  36
  37 #ifdef CONFIG_RV_REACTORS
  38 struct rv_reactor {
  39         const char              *name;
  40         const char              *description;
  41         void                    (*react)(char *msg);
  42 };
  43 #endif
  44
  45 struct rv_monitor {
  46         const char              *name;
  47         const char              *description;
  48         bool                    enabled;
  49         int                     (*enable)(void);
  50         void                    (*disable)(void);
  51         void                    (*reset)(void);
  52 #ifdef CONFIG_RV_REACTORS
  53         void                    (*react)(char *msg);
  54 #endif
  55 };
  56
  57 bool rv_monitoring_on(void);
  58 int rv_unregister_monitor(struct rv_monitor *monitor);
  59 int rv_register_monitor(struct rv_monitor *monitor);
  60 int rv_get_task_monitor_slot(void);
  61 void rv_put_task_monitor_slot(int slot);
  62
  63 #ifdef CONFIG_RV_REACTORS
  64 bool rv_reacting_on(void);
  65 int rv_unregister_reactor(struct rv_reactor *reactor);
  66 int rv_register_reactor(struct rv_reactor *reactor);
  67 #endif /* CONFIG_RV_REACTORS */
  68
  69 #endif /* CONFIG_RV */
  70 #endif /* _LINUX_RV_H */