include/lttng/event-rule/kernel-tracepoint-internal.hpp

   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_TRACEPOINT_INTERNAL_H
   9 #define LTTNG_EVENT_RULE_KERNEL_TRACEPOINT_INTERNAL_H
  10
  11 #include <common/payload-view.hpp>
  12 #include <common/macros.hpp>
  13 #include <common/optional.hpp>
  14 #include <lttng/event-rule/event-rule-internal.hpp>
  15 #include <lttng/event-rule/kernel-tracepoint.h>
  16 #include <lttng/event.h>
  17
  18 struct lttng_event_rule_kernel_tracepoint {
  19         struct lttng_event_rule parent;
  20
  21         /* Name pattern. */
  22         char *pattern;
  23
  24         /* Filter. */
  25         char *filter_expression;
  26
  27         /* internal use only. */
  28         struct {
  29                 char *filter;
  30                 struct lttng_bytecode *bytecode;
  31         } internal_filter;
  32 };
  33
  34 struct lttng_event_rule_kernel_tracepoint_comm {
  35         /* Includes terminator `\0`. */
  36         uint32_t pattern_len;
  37         /* Includes terminator `\0`. */
  38         uint32_t filter_expression_len;
  39         /*
  40          * Payload is composed of, in that order:
  41          *   - pattern (null terminated),
  42          *   - filter expression (null terminated),
  43          */
  44         char payload[];
  45 } LTTNG_PACKED;
  46
  47 ssize_t lttng_event_rule_kernel_tracepoint_create_from_payload(
  48                 struct lttng_payload_view *view,
  49                 struct lttng_event_rule **rule);
  50
  51 #endif /* LTTNG_EVENT_RULE_KERNEL_TRACEPOINT_INTERNAL_H */