| 1 | /* |
| 2 | * Copyright (C) 2020 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: LGPL-2.1-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <assert.h> |
| 9 | #include <common/dynamic-buffer.h> |
| 10 | #include <common/error.h> |
| 11 | #include <common/macros.h> |
| 12 | #include <common/hashtable/hashtable.h> |
| 13 | #include <common/hashtable/utils.h> |
| 14 | #include <lttng/log-level-rule-internal.h> |
| 15 | #include <lttng/log-level-rule.h> |
| 16 | #include <stdbool.h> |
| 17 | #include <stdlib.h> |
| 18 | |
| 19 | static bool is_log_level_rule_exactly_type(const struct lttng_log_level_rule *rule) |
| 20 | { |
| 21 | enum lttng_log_level_rule_type type = |
| 22 | lttng_log_level_rule_get_type(rule); |
| 23 | |
| 24 | return type == LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY; |
| 25 | } |
| 26 | |
| 27 | static bool is_log_level_rule_at_least_as_severe_type(const struct lttng_log_level_rule *rule) |
| 28 | { |
| 29 | |
| 30 | enum lttng_log_level_rule_type type = |
| 31 | lttng_log_level_rule_get_type(rule); |
| 32 | |
| 33 | return type == LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS; |
| 34 | } |
| 35 | |
| 36 | enum lttng_log_level_rule_type lttng_log_level_rule_get_type( |
| 37 | const struct lttng_log_level_rule *rule) |
| 38 | { |
| 39 | return rule ? rule->type : LTTNG_LOG_LEVEL_RULE_TYPE_UNKNOWN; |
| 40 | } |
| 41 | |
| 42 | struct lttng_log_level_rule *lttng_log_level_rule_exactly_create( |
| 43 | int level) |
| 44 | { |
| 45 | struct lttng_log_level_rule *rule = NULL; |
| 46 | |
| 47 | rule = zmalloc(sizeof(struct lttng_log_level_rule)); |
| 48 | if (!rule) { |
| 49 | goto end; |
| 50 | } |
| 51 | |
| 52 | rule->type = LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY; |
| 53 | rule->level = level; |
| 54 | |
| 55 | end: |
| 56 | return rule; |
| 57 | } |
| 58 | |
| 59 | enum lttng_log_level_rule_status lttng_log_level_rule_exactly_get_level( |
| 60 | const struct lttng_log_level_rule *rule, int *level) |
| 61 | { |
| 62 | enum lttng_log_level_rule_status status = |
| 63 | LTTNG_LOG_LEVEL_RULE_STATUS_OK; |
| 64 | |
| 65 | if (!rule || !level || !is_log_level_rule_exactly_type(rule)) { |
| 66 | status = LTTNG_LOG_LEVEL_RULE_STATUS_INVALID; |
| 67 | goto end; |
| 68 | } |
| 69 | |
| 70 | *level = rule->level; |
| 71 | end: |
| 72 | return status; |
| 73 | } |
| 74 | |
| 75 | struct lttng_log_level_rule * |
| 76 | lttng_log_level_rule_at_least_as_severe_as_create(int level) |
| 77 | { |
| 78 | struct lttng_log_level_rule *rule = NULL; |
| 79 | |
| 80 | rule = zmalloc(sizeof(struct lttng_log_level_rule)); |
| 81 | if (!rule) { |
| 82 | goto end; |
| 83 | } |
| 84 | |
| 85 | rule->type = LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS; |
| 86 | rule->level = level; |
| 87 | |
| 88 | end: |
| 89 | return rule; |
| 90 | } |
| 91 | |
| 92 | enum lttng_log_level_rule_status |
| 93 | lttng_log_level_rule_at_least_as_severe_as_get_level( |
| 94 | const struct lttng_log_level_rule *rule, int *level) |
| 95 | { |
| 96 | enum lttng_log_level_rule_status status = LTTNG_LOG_LEVEL_RULE_STATUS_OK; |
| 97 | |
| 98 | if (!rule || !level || |
| 99 | !is_log_level_rule_at_least_as_severe_type(rule)) { |
| 100 | status = LTTNG_LOG_LEVEL_RULE_STATUS_INVALID; |
| 101 | goto end; |
| 102 | } |
| 103 | |
| 104 | *level = rule->level; |
| 105 | end: |
| 106 | return status; |
| 107 | } |
| 108 | |
| 109 | void lttng_log_level_rule_destroy(struct lttng_log_level_rule *log_level_rule) |
| 110 | { |
| 111 | free(log_level_rule); |
| 112 | } |
| 113 | |
| 114 | LTTNG_HIDDEN |
| 115 | ssize_t lttng_log_level_rule_create_from_payload( |
| 116 | struct lttng_payload_view *view, |
| 117 | struct lttng_log_level_rule **_rule) |
| 118 | { |
| 119 | ssize_t ret; |
| 120 | size_t offset = 0; |
| 121 | struct lttng_log_level_rule *rule = NULL; |
| 122 | const struct lttng_log_level_rule_comm *comm = |
| 123 | (const struct lttng_log_level_rule_comm *) |
| 124 | view->buffer.data; |
| 125 | |
| 126 | offset += sizeof(*comm); |
| 127 | |
| 128 | if (!_rule) { |
| 129 | ret = -1; |
| 130 | goto end; |
| 131 | } |
| 132 | |
| 133 | if (view->buffer.size < sizeof(*comm)) { |
| 134 | ret = -1; |
| 135 | goto end; |
| 136 | } |
| 137 | |
| 138 | switch (comm->type) { |
| 139 | case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY: |
| 140 | rule = lttng_log_level_rule_exactly_create((int) comm->level); |
| 141 | break; |
| 142 | case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS: |
| 143 | rule = lttng_log_level_rule_at_least_as_severe_as_create( |
| 144 | (int) comm->level); |
| 145 | break; |
| 146 | default: |
| 147 | abort(); |
| 148 | } |
| 149 | |
| 150 | if (!rule) { |
| 151 | ret = -1; |
| 152 | goto end; |
| 153 | } |
| 154 | |
| 155 | *_rule = rule; |
| 156 | ret = offset; |
| 157 | |
| 158 | end: |
| 159 | return ret; |
| 160 | } |
| 161 | |
| 162 | LTTNG_HIDDEN |
| 163 | int lttng_log_level_rule_serialize(const struct lttng_log_level_rule *rule, |
| 164 | struct lttng_payload *payload) |
| 165 | { |
| 166 | int ret; |
| 167 | struct lttng_log_level_rule_comm comm; |
| 168 | |
| 169 | |
| 170 | if (!rule) { |
| 171 | ret = 0; |
| 172 | goto end; |
| 173 | } |
| 174 | |
| 175 | comm.type = (int8_t) rule->type; |
| 176 | comm.level = (int32_t) rule->level; |
| 177 | |
| 178 | DBG("Serializing log level rule of type %d", rule->type); |
| 179 | ret = lttng_dynamic_buffer_append(&payload->buffer, &comm, |
| 180 | sizeof(comm)); |
| 181 | if (ret) { |
| 182 | goto end; |
| 183 | } |
| 184 | |
| 185 | end: |
| 186 | return ret; |
| 187 | } |
| 188 | |
| 189 | LTTNG_HIDDEN |
| 190 | bool lttng_log_level_rule_is_equal(const struct lttng_log_level_rule *a, |
| 191 | const struct lttng_log_level_rule *b) |
| 192 | { |
| 193 | bool is_equal = false; |
| 194 | |
| 195 | if (a == NULL && b == NULL) { |
| 196 | /* Both are null. */ |
| 197 | is_equal = true; |
| 198 | goto end; |
| 199 | } |
| 200 | |
| 201 | if (a == NULL || b == NULL) { |
| 202 | /* One is NULL.*/ |
| 203 | goto end; |
| 204 | } |
| 205 | |
| 206 | if (a == b) { |
| 207 | /* Same object.*/ |
| 208 | is_equal = true; |
| 209 | goto end; |
| 210 | } |
| 211 | |
| 212 | if (a->type != b->type) { |
| 213 | goto end; |
| 214 | } |
| 215 | |
| 216 | if (a->level != b->level) { |
| 217 | goto end; |
| 218 | } |
| 219 | |
| 220 | is_equal = true; |
| 221 | |
| 222 | end: |
| 223 | return is_equal; |
| 224 | } |
| 225 | |
| 226 | LTTNG_HIDDEN |
| 227 | struct lttng_log_level_rule *lttng_log_level_rule_copy( |
| 228 | const struct lttng_log_level_rule *source) |
| 229 | { |
| 230 | struct lttng_log_level_rule *copy = NULL; |
| 231 | |
| 232 | assert(source); |
| 233 | |
| 234 | copy = zmalloc(sizeof(struct lttng_log_level_rule)); |
| 235 | if (!copy) { |
| 236 | goto end; |
| 237 | } |
| 238 | |
| 239 | copy->type = source->type; |
| 240 | copy->level = source->level; |
| 241 | end: |
| 242 | return copy; |
| 243 | } |
| 244 | |
| 245 | LTTNG_HIDDEN |
| 246 | void lttng_log_level_rule_to_loglevel( |
| 247 | const struct lttng_log_level_rule *log_level_rule, |
| 248 | enum lttng_loglevel_type *loglevel_type, |
| 249 | int *loglevel_value) |
| 250 | { |
| 251 | assert(log_level_rule); |
| 252 | |
| 253 | switch (log_level_rule->type) { |
| 254 | case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY: |
| 255 | *loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
| 256 | break; |
| 257 | case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS: |
| 258 | *loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
| 259 | break; |
| 260 | default: |
| 261 | abort(); |
| 262 | } |
| 263 | |
| 264 | *loglevel_value = log_level_rule->level; |
| 265 | } |
| 266 | |
| 267 | LTTNG_HIDDEN |
| 268 | unsigned long lttng_log_level_rule_hash( |
| 269 | const struct lttng_log_level_rule *log_level_rule) |
| 270 | { |
| 271 | unsigned long hash; |
| 272 | enum lttng_log_level_rule_status llr_status; |
| 273 | int log_level_value; |
| 274 | enum lttng_log_level_rule_type type; |
| 275 | |
| 276 | assert(log_level_rule); |
| 277 | |
| 278 | type = lttng_log_level_rule_get_type(log_level_rule); |
| 279 | |
| 280 | switch (type) { |
| 281 | case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY: |
| 282 | llr_status = lttng_log_level_rule_exactly_get_level( |
| 283 | log_level_rule, &log_level_value); |
| 284 | break; |
| 285 | case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS: |
| 286 | llr_status = lttng_log_level_rule_at_least_as_severe_as_get_level( |
| 287 | log_level_rule, &log_level_value); |
| 288 | break; |
| 289 | default: |
| 290 | abort(); |
| 291 | break; |
| 292 | } |
| 293 | |
| 294 | assert(llr_status == LTTNG_LOG_LEVEL_RULE_STATUS_OK); |
| 295 | |
| 296 | hash = hash_key_ulong((void *) (unsigned long) type, lttng_ht_seed); |
| 297 | |
| 298 | hash ^= hash_key_ulong((void *) (unsigned long) log_level_value, |
| 299 | lttng_ht_seed); |
| 300 | |
| 301 | return hash; |
| 302 | } |