include/lttng/event-rule/kernel-kprobe.h

   1 /*
   2  * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
   3  *
   4  * SPDX-License-Identifier: LGPL-2.1-only
   5  *
   6  */
   7
   8 #ifndef LTTNG_EVENT_RULE_KERNEL_KPROBE_H
   9 #define LTTNG_EVENT_RULE_KERNEL_KPROBE_H
  10
  11 #include <lttng/event-rule/event-rule.h>
  12
  13 #ifdef __cplusplus
  14 extern "C" {
  15 #endif
  16
  17 struct lttng_kernel_probe_location;
  18
  19 /*
  20  * Create a newly allocated kernel kprobe event rule.
  21  *
  22  * The location is copied internally.
  23  *
  24  * Returns a new event rule on success, NULL on failure. The returned event rule
  25  * must be destroyed using lttng_event_rule_destroy().
  26  */
  27 extern struct lttng_event_rule *lttng_event_rule_kernel_kprobe_create(
  28                 const struct lttng_kernel_probe_location *location);
  29
  30 /*
  31  * Get the kernel probe location of a kernel kprobe event rule.
  32  *
  33  * The caller does not assume the ownership of the returned location.
  34  * The location shall only be used for the duration of the event
  35  * rule's lifetime, or before a different location is set.
  36  *
  37  * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's location
  38  * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is
  39  * passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a location was not set prior to
  40  * this call.
  41  */
  42 extern enum lttng_event_rule_status lttng_event_rule_kernel_kprobe_get_location(
  43                 const struct lttng_event_rule *rule,
  44                 const struct lttng_kernel_probe_location **location);
  45
  46 /*
  47  * Set the name of a kernel kprobe event rule.
  48  *
  49  * The name is copied internally.
  50  *
  51  * Returns LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
  52  * if invalid parameters are passed.
  53  */
  54 extern enum lttng_event_rule_status lttng_event_rule_kernel_kprobe_set_event_name(
  55                 struct lttng_event_rule *rule, const char *name);
  56
  57 /*
  58  * Get the name of a kernel kprobe event rule.
  59  *
  60  * The caller does not assume the ownership of the returned name.
  61  * The name shall only only be used for the duration of the event
  62  * rule's lifetime, or before a different name is set.
  63  *
  64  * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's name on
  65  * success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is passed,
  66  * or LTTNG_EVENT_RULE_STATUS_UNSET if a name was not set prior to this call.
  67  */
  68 extern enum lttng_event_rule_status lttng_event_rule_kernel_kprobe_get_event_name(
  69                 const struct lttng_event_rule *rule, const char **name);
  70
  71 #ifdef __cplusplus
  72 }
  73 #endif
  74
  75 #endif /* LTTNG_EVENT_RULE_KERNEL_KPROBE_H */