include/lttng/action/action-internal.h

   1 /*
   2  * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  *
   4  * SPDX-License-Identifier: LGPL-2.1-only
   5  *
   6  */
   7
   8 #ifndef LTTNG_ACTION_INTERNAL_H
   9 #define LTTNG_ACTION_INTERNAL_H
  10
  11 #include <common/buffer-view.h>
  12 #include <common/dynamic-buffer.h>
  13 #include <common/macros.h>
  14 #include <common/payload-view.h>
  15 #include <common/payload.h>
  16 #include <lttng/lttng.h>
  17 #include <pthread.h>
  18 #include <stdbool.h>
  19 #include <sys/types.h>
  20 #include <urcu/ref.h>
  21
  22 struct lttng_rate_policy;
  23
  24 typedef bool (*action_validate_cb)(struct lttng_action *action);
  25 typedef void (*action_destroy_cb)(struct lttng_action *action);
  26 typedef int (*action_serialize_cb)(struct lttng_action *action,
  27                 struct lttng_payload *payload);
  28 typedef bool (*action_equal_cb)(const struct lttng_action *a,
  29                 const struct lttng_action *b);
  30 typedef ssize_t (*action_create_from_payload_cb)(
  31                 struct lttng_payload_view *view,
  32                 struct lttng_action **action);
  33 typedef const struct lttng_rate_policy *(*action_get_rate_policy_cb)(
  34                 const struct lttng_action *action);
  35 typedef enum lttng_action_status (*action_add_error_query_results_cb)(
  36                 const struct lttng_action *action,
  37                 struct lttng_error_query_results *results);
  38
  39 struct lttng_action {
  40         struct urcu_ref ref;
  41         enum lttng_action_type type;
  42         action_validate_cb validate;
  43         action_serialize_cb serialize;
  44         action_equal_cb equal;
  45         action_destroy_cb destroy;
  46         action_get_rate_policy_cb get_rate_policy;
  47         action_add_error_query_results_cb add_error_query_results;
  48
  49         /* Internal use only. */
  50
  51         /* The number of time the actions was enqueued for execution. */
  52         uint64_t execution_request_counter;
  53         /*
  54          * The number of time the action was actually executed.
  55          * Action rate policy can impact on this number.
  56          * */
  57         uint64_t execution_counter;
  58         /*
  59          * The number of time the action execution failed.
  60          * An unsigned long is used to use a type which makes atomic
  61          * operations possible.
  62          */
  63         unsigned long execution_failure_counter;
  64 };
  65
  66 struct lttng_action_comm {
  67         /* enum lttng_action_type */
  68         int8_t action_type;
  69 } LTTNG_PACKED;
  70
  71 LTTNG_HIDDEN
  72 void lttng_action_init(struct lttng_action *action,
  73                 enum lttng_action_type type,
  74                 action_validate_cb validate,
  75                 action_serialize_cb serialize,
  76                 action_equal_cb equal,
  77                 action_destroy_cb destroy,
  78                 action_get_rate_policy_cb get_rate_policy,
  79                 action_add_error_query_results_cb add_error_query_results);
  80
  81 LTTNG_HIDDEN
  82 bool lttng_action_validate(struct lttng_action *action);
  83
  84 LTTNG_HIDDEN
  85 int lttng_action_serialize(struct lttng_action *action,
  86                 struct lttng_payload *buf);
  87
  88 LTTNG_HIDDEN
  89 ssize_t lttng_action_create_from_payload(struct lttng_payload_view *view,
  90                 struct lttng_action **action);
  91
  92 LTTNG_HIDDEN
  93 bool lttng_action_is_equal(const struct lttng_action *a,
  94                 const struct lttng_action *b);
  95
  96 LTTNG_HIDDEN
  97 void lttng_action_get(struct lttng_action *action);
  98
  99 LTTNG_HIDDEN
 100 void lttng_action_put(struct lttng_action *action);
 101
 102 LTTNG_HIDDEN
 103 const char* lttng_action_type_string(enum lttng_action_type action_type);
 104
 105 LTTNG_HIDDEN
 106 void lttng_action_increase_execution_request_count(struct lttng_action *action);
 107
 108 LTTNG_HIDDEN
 109 void lttng_action_increase_execution_count(struct lttng_action *action);
 110
 111 LTTNG_HIDDEN
 112 void lttng_action_increase_execution_failure_count(struct lttng_action *action);
 113
 114 LTTNG_HIDDEN
 115 bool lttng_action_should_execute(const struct lttng_action *action);
 116
 117 LTTNG_HIDDEN
 118 enum lttng_action_status lttng_action_add_error_query_results(
 119                 const struct lttng_action *action,
 120                 struct lttng_error_query_results *results);
 121
 122 /*
 123  * For use by the various lttng_action implementation. Implements the default
 124  * behavior to the generic error "execution failure counter" that all actions
 125  * (except list, which passes-through) provide.
 126  */
 127 LTTNG_HIDDEN
 128 enum lttng_action_status lttng_action_generic_add_error_query_results(
 129                 const struct lttng_action *action,
 130                 struct lttng_error_query_results *results);
 131
 132 #endif /* LTTNG_ACTION_INTERNAL_H */