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