| 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_CONDITION_event_rule_INTERNAL_H |
| 9 | #define LTTNG_CONDITION_event_rule_INTERNAL_H |
| 10 | |
| 11 | #include <lttng/condition/condition-internal.h> |
| 12 | #include <common/buffer-view.h> |
| 13 | #include <common/macros.h> |
| 14 | #include <lttng/condition/evaluation-internal.h> |
| 15 | #include <common/dynamic-array.h> |
| 16 | #include <lttng/event-field-value.h> |
| 17 | |
| 18 | struct lttng_capture_descriptor { |
| 19 | /* The index at which the capture for this descriptor in the received |
| 20 | * payload from the tracer. This is populated on sessiond side. |
| 21 | * -1 is uninitialized. |
| 22 | * This is necessary since a single trigger can have multiple notify |
| 23 | * action, only an ordered set of capture desciptor is passed to the tracer. |
| 24 | */ |
| 25 | int32_t capture_index; |
| 26 | struct lttng_event_expr *event_expression; |
| 27 | }; |
| 28 | |
| 29 | struct lttng_condition_event_rule { |
| 30 | struct lttng_condition parent; |
| 31 | struct lttng_event_rule *rule; |
| 32 | |
| 33 | /* Array of `struct lttng_capture_descriptor *` */ |
| 34 | struct lttng_dynamic_pointer_array capture_descriptors; |
| 35 | }; |
| 36 | |
| 37 | struct lttng_evaluation_event_rule { |
| 38 | struct lttng_evaluation parent; |
| 39 | char *name; |
| 40 | |
| 41 | /* MessagePack-encoded captured event field values */ |
| 42 | struct lttng_dynamic_buffer capture_payload; |
| 43 | |
| 44 | /* |
| 45 | * The content of this array event field value is the decoded |
| 46 | * version of `capture_payload` above. |
| 47 | * |
| 48 | * This is a cache: it's not serialized/deserialized in |
| 49 | * communications from/to the library and the session daemon. |
| 50 | */ |
| 51 | struct lttng_event_field_value *captured_values; |
| 52 | }; |
| 53 | |
| 54 | struct lttng_evaluation_event_rule_comm { |
| 55 | uint32_t trigger_name_length; |
| 56 | /* Trigger name */ |
| 57 | char payload[]; |
| 58 | } LTTNG_PACKED; |
| 59 | |
| 60 | struct lttng_condition_event_rule_capture_bytecode_element |
| 61 | { |
| 62 | struct lttng_event_expr *expression; |
| 63 | struct lttng_bytecode *bytecode; |
| 64 | }; |
| 65 | |
| 66 | LTTNG_HIDDEN |
| 67 | ssize_t lttng_condition_event_rule_create_from_payload( |
| 68 | struct lttng_payload_view *view, |
| 69 | struct lttng_condition **condition); |
| 70 | |
| 71 | LTTNG_HIDDEN |
| 72 | enum lttng_condition_status |
| 73 | lttng_condition_event_rule_get_rule_mutable( |
| 74 | const struct lttng_condition *condition, |
| 75 | struct lttng_event_rule **rule); |
| 76 | |
| 77 | LTTNG_HIDDEN |
| 78 | struct lttng_evaluation *lttng_evaluation_event_rule_create( |
| 79 | const struct lttng_condition_event_rule *condition, |
| 80 | const char* trigger_name, |
| 81 | const char *capture_payload, size_t capture_payload_size, |
| 82 | bool decode_capture_payload); |
| 83 | |
| 84 | LTTNG_HIDDEN |
| 85 | ssize_t lttng_evaluation_event_rule_create_from_payload( |
| 86 | const struct lttng_condition_event_rule *condition, |
| 87 | struct lttng_payload_view *view, |
| 88 | struct lttng_evaluation **_evaluation); |
| 89 | |
| 90 | /* |
| 91 | * The returned `lttng_dynamic_pointer_array` contains a index ordered set of |
| 92 | * `lttng_condition_event_rule_capture_bytecode_element`. |
| 93 | * This ensure that minimal work will be done by the tracer for cases where |
| 94 | * multiple identical capture expression are present. |
| 95 | */ |
| 96 | LTTNG_HIDDEN |
| 97 | enum lttng_error_code |
| 98 | lttng_condition_event_rule_generate_capture_descriptor_bytecode_set( |
| 99 | struct lttng_condition *condition, |
| 100 | struct lttng_dynamic_pointer_array *bytecode_set); |
| 101 | |
| 102 | LTTNG_HIDDEN |
| 103 | struct lttng_capture_descriptor * |
| 104 | lttng_condition_event_rule_get_internal_capture_descriptor_at_index( |
| 105 | const struct lttng_condition *condition, unsigned int index); |
| 106 | |
| 107 | #endif /* LTTNG_CONDITION_event_rule_INTERNAL_H */ |