| 1 | /* |
| 2 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, |
| 6 | * as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This library is distributed in the hope that it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License |
| 11 | * for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU Lesser General Public License |
| 14 | * along with this library; if not, write to the Free Software Foundation, |
| 15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 16 | */ |
| 17 | |
| 18 | #include <lttng/condition/evaluation-internal.h> |
| 19 | #include <lttng/condition/buffer-usage-internal.h> |
| 20 | #include <lttng/condition/session-consumed-size-internal.h> |
| 21 | #include <lttng/condition/session-rotation-internal.h> |
| 22 | #include <common/macros.h> |
| 23 | #include <common/error.h> |
| 24 | #include <stdbool.h> |
| 25 | #include <assert.h> |
| 26 | |
| 27 | LTTNG_HIDDEN |
| 28 | void lttng_evaluation_init(struct lttng_evaluation *evaluation, |
| 29 | enum lttng_condition_type type) |
| 30 | { |
| 31 | evaluation->type = type; |
| 32 | } |
| 33 | |
| 34 | LTTNG_HIDDEN |
| 35 | int lttng_evaluation_serialize(const struct lttng_evaluation *evaluation, |
| 36 | struct lttng_dynamic_buffer *buf) |
| 37 | { |
| 38 | int ret; |
| 39 | struct lttng_evaluation_comm evaluation_comm = { |
| 40 | .type = (int8_t) evaluation->type |
| 41 | }; |
| 42 | |
| 43 | ret = lttng_dynamic_buffer_append(buf, &evaluation_comm, |
| 44 | sizeof(evaluation_comm)); |
| 45 | if (ret) { |
| 46 | goto end; |
| 47 | } |
| 48 | |
| 49 | if (evaluation->serialize) { |
| 50 | ret = evaluation->serialize(evaluation, buf); |
| 51 | if (ret) { |
| 52 | goto end; |
| 53 | } |
| 54 | } |
| 55 | end: |
| 56 | return ret; |
| 57 | } |
| 58 | |
| 59 | LTTNG_HIDDEN |
| 60 | ssize_t lttng_evaluation_create_from_buffer( |
| 61 | const struct lttng_buffer_view *src_view, |
| 62 | struct lttng_evaluation **evaluation) |
| 63 | { |
| 64 | ssize_t ret, evaluation_size = 0; |
| 65 | const struct lttng_evaluation_comm *evaluation_comm; |
| 66 | const struct lttng_buffer_view evaluation_view = |
| 67 | lttng_buffer_view_from_view(src_view, |
| 68 | sizeof(*evaluation_comm), -1); |
| 69 | |
| 70 | if (!src_view || !evaluation) { |
| 71 | ret = -1; |
| 72 | goto end; |
| 73 | } |
| 74 | |
| 75 | evaluation_comm = (const struct lttng_evaluation_comm *) src_view->data; |
| 76 | evaluation_size += sizeof(*evaluation_comm); |
| 77 | |
| 78 | switch ((enum lttng_condition_type) evaluation_comm->type) { |
| 79 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: |
| 80 | ret = lttng_evaluation_buffer_usage_low_create_from_buffer( |
| 81 | &evaluation_view, evaluation); |
| 82 | if (ret < 0) { |
| 83 | goto end; |
| 84 | } |
| 85 | evaluation_size += ret; |
| 86 | break; |
| 87 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: |
| 88 | ret = lttng_evaluation_buffer_usage_high_create_from_buffer( |
| 89 | &evaluation_view, evaluation); |
| 90 | if (ret < 0) { |
| 91 | goto end; |
| 92 | } |
| 93 | evaluation_size += ret; |
| 94 | break; |
| 95 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: |
| 96 | ret = lttng_evaluation_session_consumed_size_create_from_buffer( |
| 97 | &evaluation_view, evaluation); |
| 98 | if (ret < 0) { |
| 99 | goto end; |
| 100 | } |
| 101 | evaluation_size += ret; |
| 102 | break; |
| 103 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: |
| 104 | ret = lttng_evaluation_session_rotation_ongoing_create_from_buffer( |
| 105 | &evaluation_view, evaluation); |
| 106 | if (ret < 0) { |
| 107 | goto end; |
| 108 | } |
| 109 | evaluation_size += ret; |
| 110 | break; |
| 111 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: |
| 112 | ret = lttng_evaluation_session_rotation_completed_create_from_buffer( |
| 113 | &evaluation_view, evaluation); |
| 114 | if (ret < 0) { |
| 115 | goto end; |
| 116 | } |
| 117 | evaluation_size += ret; |
| 118 | break; |
| 119 | default: |
| 120 | ERR("Attempted to create evaluation of unknown type (%i)", |
| 121 | (int) evaluation_comm->type); |
| 122 | ret = -1; |
| 123 | goto end; |
| 124 | } |
| 125 | ret = evaluation_size; |
| 126 | end: |
| 127 | return ret; |
| 128 | } |
| 129 | |
| 130 | enum lttng_condition_type lttng_evaluation_get_type( |
| 131 | const struct lttng_evaluation *evaluation) |
| 132 | { |
| 133 | return evaluation ? evaluation->type : LTTNG_CONDITION_TYPE_UNKNOWN; |
| 134 | } |
| 135 | |
| 136 | void lttng_evaluation_destroy(struct lttng_evaluation *evaluation) |
| 137 | { |
| 138 | if (!evaluation) { |
| 139 | return; |
| 140 | } |
| 141 | |
| 142 | assert(evaluation->destroy); |
| 143 | evaluation->destroy(evaluation); |
| 144 | } |