| 1 | /* |
| 2 | * Copyright (C) 2019 - Jonathan Rajotte-Julien <jonathan.rajotte-julien@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 <assert.h> |
| 19 | #include <common/defaults.h> |
| 20 | #include <common/error.h> |
| 21 | #include <common/macros.h> |
| 22 | #include <common/sessiond-comm/sessiond-comm.h> |
| 23 | #include <common/uri.h> |
| 24 | #include <lttng/tracker-internal.h> |
| 25 | #include <stdio.h> |
| 26 | #include <time.h> |
| 27 | |
| 28 | struct lttng_tracker_id *lttng_tracker_id_create(void) |
| 29 | { |
| 30 | struct lttng_tracker_id *id; |
| 31 | |
| 32 | id = zmalloc(sizeof(*id)); |
| 33 | if (!id) { |
| 34 | goto error; |
| 35 | } |
| 36 | |
| 37 | id->type = LTTNG_ID_UNKNOWN; |
| 38 | id->string = NULL; |
| 39 | id->value = -1; |
| 40 | return id; |
| 41 | error: |
| 42 | lttng_tracker_id_destroy(id); |
| 43 | return NULL; |
| 44 | } |
| 45 | |
| 46 | enum lttng_tracker_id_status lttng_tracker_id_set_value( |
| 47 | struct lttng_tracker_id *id, int value) |
| 48 | { |
| 49 | assert(id); |
| 50 | |
| 51 | if (value < 0) { |
| 52 | return LTTNG_TRACKER_ID_STATUS_INVALID; |
| 53 | } |
| 54 | |
| 55 | id->type = LTTNG_ID_VALUE; |
| 56 | id->value = value; |
| 57 | return LTTNG_TRACKER_ID_STATUS_OK; |
| 58 | } |
| 59 | |
| 60 | enum lttng_tracker_id_status lttng_tracker_id_set_string( |
| 61 | struct lttng_tracker_id *id, const char *value) |
| 62 | { |
| 63 | assert(id); |
| 64 | assert(value); |
| 65 | |
| 66 | id->type = LTTNG_ID_STRING; |
| 67 | id->string = strdup(value); |
| 68 | if (id->string == NULL) { |
| 69 | /* No memory left */ |
| 70 | goto error; |
| 71 | } |
| 72 | |
| 73 | return LTTNG_TRACKER_ID_STATUS_OK; |
| 74 | error: |
| 75 | return LTTNG_TRACKER_ID_STATUS_INVALID; |
| 76 | } |
| 77 | |
| 78 | enum lttng_tracker_id_status lttng_tracker_id_set_all( |
| 79 | struct lttng_tracker_id *id) |
| 80 | { |
| 81 | assert(id); |
| 82 | |
| 83 | id->type = LTTNG_ID_ALL; |
| 84 | |
| 85 | return LTTNG_TRACKER_ID_STATUS_OK; |
| 86 | } |
| 87 | |
| 88 | static void lttng_tracker_id_reset(struct lttng_tracker_id *id) |
| 89 | { |
| 90 | if (id == NULL) { |
| 91 | return; |
| 92 | } |
| 93 | |
| 94 | if (id->string != NULL) { |
| 95 | free(id->string); |
| 96 | id->string = NULL; |
| 97 | } |
| 98 | |
| 99 | id->type = LTTNG_ID_UNKNOWN; |
| 100 | id->value = -1; |
| 101 | } |
| 102 | |
| 103 | void lttng_tracker_id_destroy(struct lttng_tracker_id *id) |
| 104 | { |
| 105 | if (id == NULL) { |
| 106 | return; |
| 107 | } |
| 108 | |
| 109 | lttng_tracker_id_reset(id); |
| 110 | |
| 111 | free(id); |
| 112 | } |
| 113 | |
| 114 | enum lttng_tracker_id_type lttng_tracker_id_get_type( |
| 115 | const struct lttng_tracker_id *id) |
| 116 | { |
| 117 | assert(id); |
| 118 | return id->type; |
| 119 | } |
| 120 | |
| 121 | enum lttng_tracker_id_status lttng_tracker_id_get_value( |
| 122 | const struct lttng_tracker_id *id, int *value) |
| 123 | { |
| 124 | assert(id); |
| 125 | if (id->type == LTTNG_ID_UNKNOWN) { |
| 126 | return LTTNG_TRACKER_ID_STATUS_UNSET; |
| 127 | } |
| 128 | |
| 129 | if (id->type != LTTNG_ID_VALUE) { |
| 130 | return LTTNG_TRACKER_ID_STATUS_INVALID; |
| 131 | } |
| 132 | |
| 133 | *value = id->value; |
| 134 | return LTTNG_TRACKER_ID_STATUS_OK; |
| 135 | } |
| 136 | |
| 137 | bool lttng_tracker_id_is_equal(const struct lttng_tracker_id *left, |
| 138 | const struct lttng_tracker_id *right) |
| 139 | { |
| 140 | if (left->type != right->type) { |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | switch (left->type) { |
| 145 | case LTTNG_ID_ALL: |
| 146 | return 1; |
| 147 | case LTTNG_ID_VALUE: |
| 148 | if (left->value != right->value) { |
| 149 | return 0; |
| 150 | } |
| 151 | break; |
| 152 | case LTTNG_ID_STRING: |
| 153 | if (strcmp(left->string, right->string) != 0) { |
| 154 | return 0; |
| 155 | } |
| 156 | break; |
| 157 | default: |
| 158 | /* |
| 159 | * Normally this should return true, but comparing unset tracker |
| 160 | * id is "invalid". |
| 161 | */ |
| 162 | return 0; |
| 163 | } |
| 164 | return 1; |
| 165 | } |
| 166 | |
| 167 | int lttng_tracker_id_copy(struct lttng_tracker_id *dest, |
| 168 | const struct lttng_tracker_id *orig) |
| 169 | { |
| 170 | int ret = 0; |
| 171 | enum lttng_tracker_id_status status; |
| 172 | |
| 173 | assert(dest); |
| 174 | assert(orig); |
| 175 | |
| 176 | switch (orig->type) { |
| 177 | case LTTNG_ID_ALL: |
| 178 | status = lttng_tracker_id_set_all(dest); |
| 179 | break; |
| 180 | case LTTNG_ID_VALUE: |
| 181 | status = lttng_tracker_id_set_value(dest, orig->value); |
| 182 | break; |
| 183 | case LTTNG_ID_STRING: |
| 184 | status = lttng_tracker_id_set_string(dest, orig->string); |
| 185 | break; |
| 186 | default: |
| 187 | status = LTTNG_TRACKER_ID_STATUS_OK; |
| 188 | break; |
| 189 | } |
| 190 | |
| 191 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { |
| 192 | ret = -1; |
| 193 | goto error; |
| 194 | } |
| 195 | error: |
| 196 | return ret; |
| 197 | } |
| 198 | |
| 199 | struct lttng_tracker_id *lttng_tracker_id_duplicate( |
| 200 | const struct lttng_tracker_id *orig) |
| 201 | { |
| 202 | int ret; |
| 203 | struct lttng_tracker_id *copy = NULL; |
| 204 | |
| 205 | copy = lttng_tracker_id_create(); |
| 206 | if (copy == NULL) { |
| 207 | goto error; |
| 208 | } |
| 209 | |
| 210 | ret = lttng_tracker_id_copy(copy, orig); |
| 211 | if (ret) { |
| 212 | goto error; |
| 213 | } |
| 214 | |
| 215 | return copy; |
| 216 | error: |
| 217 | lttng_tracker_id_destroy(copy); |
| 218 | return NULL; |
| 219 | } |
| 220 | |
| 221 | enum lttng_tracker_id_status lttng_tracker_id_get_string( |
| 222 | const struct lttng_tracker_id *id, const char **value) |
| 223 | { |
| 224 | assert(id); |
| 225 | if (id->type == LTTNG_ID_UNKNOWN) { |
| 226 | *value = NULL; |
| 227 | return LTTNG_TRACKER_ID_STATUS_UNSET; |
| 228 | } |
| 229 | |
| 230 | if (id->type != LTTNG_ID_STRING) { |
| 231 | *value = NULL; |
| 232 | return LTTNG_TRACKER_ID_STATUS_INVALID; |
| 233 | } |
| 234 | |
| 235 | *value = id->string; |
| 236 | return LTTNG_TRACKER_ID_STATUS_OK; |
| 237 | } |
| 238 | |
| 239 | struct lttng_tracker_ids *lttng_tracker_ids_create(unsigned int count) |
| 240 | { |
| 241 | struct lttng_tracker_ids *ids = NULL; |
| 242 | |
| 243 | ids = zmalloc(sizeof(*ids)); |
| 244 | if (!ids) { |
| 245 | goto error; |
| 246 | } |
| 247 | |
| 248 | ids->id_array = zmalloc(sizeof(struct lttng_tracker_id) * count); |
| 249 | if (!ids->id_array) { |
| 250 | goto error; |
| 251 | } |
| 252 | |
| 253 | ids->count = count; |
| 254 | |
| 255 | return ids; |
| 256 | error: |
| 257 | free(ids); |
| 258 | return NULL; |
| 259 | } |
| 260 | |
| 261 | LTTNG_HIDDEN |
| 262 | struct lttng_tracker_id *lttng_tracker_ids_get_pointer_of_index( |
| 263 | const struct lttng_tracker_ids *ids, unsigned int index) |
| 264 | { |
| 265 | assert(ids); |
| 266 | if (index >= ids->count) { |
| 267 | return NULL; |
| 268 | } |
| 269 | |
| 270 | return &ids->id_array[index]; |
| 271 | } |
| 272 | |
| 273 | const struct lttng_tracker_id *lttng_tracker_ids_get_at_index( |
| 274 | const struct lttng_tracker_ids *ids, unsigned int index) |
| 275 | { |
| 276 | assert(ids); |
| 277 | return lttng_tracker_ids_get_pointer_of_index(ids, index); |
| 278 | } |
| 279 | |
| 280 | enum lttng_tracker_id_status lttng_tracker_ids_get_count(const struct lttng_tracker_ids *ids, unsigned int *count) |
| 281 | { |
| 282 | |
| 283 | enum lttng_tracker_id_status status = LTTNG_TRACKER_ID_STATUS_OK; |
| 284 | |
| 285 | if (!ids || !count) { |
| 286 | status = LTTNG_TRACKER_ID_STATUS_INVALID; |
| 287 | goto end; |
| 288 | } |
| 289 | |
| 290 | *count = ids->count; |
| 291 | end: |
| 292 | return status; |
| 293 | } |
| 294 | |
| 295 | void lttng_tracker_ids_destroy(struct lttng_tracker_ids *ids) |
| 296 | { |
| 297 | if (!ids) { |
| 298 | return; |
| 299 | } |
| 300 | |
| 301 | for (int i = 0; i < ids->count; i++) { |
| 302 | lttng_tracker_id_reset(&ids->id_array[i]); |
| 303 | } |
| 304 | free(ids->id_array); |
| 305 | free(ids); |
| 306 | } |
| 307 | |
| 308 | int lttng_tracker_ids_serialize(const struct lttng_tracker_ids *ids, |
| 309 | struct lttng_dynamic_buffer *buffer) |
| 310 | { |
| 311 | int ret; |
| 312 | int value; |
| 313 | const char *string; |
| 314 | unsigned int count; |
| 315 | enum lttng_tracker_id_status status; |
| 316 | const struct lttng_tracker_id *id; |
| 317 | |
| 318 | status = lttng_tracker_ids_get_count(ids, &count); |
| 319 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { |
| 320 | ret = LTTNG_ERR_INVALID; |
| 321 | goto error; |
| 322 | } |
| 323 | |
| 324 | for (unsigned int i = 0; i < count; i++) { |
| 325 | struct lttcomm_tracker_id_header id_hdr; |
| 326 | size_t var_data_len = 0; |
| 327 | |
| 328 | id = lttng_tracker_ids_get_at_index(ids, i); |
| 329 | if (!id) { |
| 330 | ret = -LTTNG_ERR_INVALID; |
| 331 | goto error; |
| 332 | } |
| 333 | |
| 334 | memset(&id_hdr, 0, sizeof(id_hdr)); |
| 335 | id_hdr.type = lttng_tracker_id_get_type(id); |
| 336 | switch (id_hdr.type) { |
| 337 | case LTTNG_ID_ALL: |
| 338 | break; |
| 339 | case LTTNG_ID_VALUE: |
| 340 | status = lttng_tracker_id_get_value(id, &value); |
| 341 | id_hdr.u.value = value; |
| 342 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { |
| 343 | ret = -LTTNG_ERR_INVALID; |
| 344 | goto error; |
| 345 | } |
| 346 | break; |
| 347 | case LTTNG_ID_STRING: |
| 348 | status = lttng_tracker_id_get_string( |
| 349 | id, &string); |
| 350 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { |
| 351 | ret = -LTTNG_ERR_INVALID; |
| 352 | goto error; |
| 353 | } |
| 354 | |
| 355 | id_hdr.u.var_data_len = var_data_len = |
| 356 | strlen(string) + 1; |
| 357 | break; |
| 358 | default: |
| 359 | ret = -LTTNG_ERR_INVALID; |
| 360 | goto error; |
| 361 | } |
| 362 | ret = lttng_dynamic_buffer_append( |
| 363 | buffer, &id_hdr, sizeof(id_hdr)); |
| 364 | if (ret) { |
| 365 | ret = -LTTNG_ERR_NOMEM; |
| 366 | goto error; |
| 367 | } |
| 368 | ret = lttng_dynamic_buffer_append( |
| 369 | buffer, string, var_data_len); |
| 370 | if (ret) { |
| 371 | ret = -LTTNG_ERR_NOMEM; |
| 372 | goto error; |
| 373 | } |
| 374 | } |
| 375 | error: |
| 376 | return ret; |
| 377 | } |