| 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 | #include <assert.h> |
| 9 | #include <common/defaults.h> |
| 10 | #include <common/error.h> |
| 11 | #include <common/macros.h> |
| 12 | #include <common/sessiond-comm/sessiond-comm.h> |
| 13 | #include <common/uri.h> |
| 14 | #include <lttng/tracker-internal.h> |
| 15 | #include <stdio.h> |
| 16 | #include <time.h> |
| 17 | |
| 18 | struct lttng_tracker_id *lttng_tracker_id_create(void) |
| 19 | { |
| 20 | struct lttng_tracker_id *id; |
| 21 | |
| 22 | id = zmalloc(sizeof(*id)); |
| 23 | if (!id) { |
| 24 | goto error; |
| 25 | } |
| 26 | |
| 27 | id->type = LTTNG_ID_UNKNOWN; |
| 28 | id->string = NULL; |
| 29 | id->value = -1; |
| 30 | return id; |
| 31 | error: |
| 32 | lttng_tracker_id_destroy(id); |
| 33 | return NULL; |
| 34 | } |
| 35 | |
| 36 | enum lttng_tracker_id_status lttng_tracker_id_set_value( |
| 37 | struct lttng_tracker_id *id, int value) |
| 38 | { |
| 39 | assert(id); |
| 40 | |
| 41 | if (value < 0) { |
| 42 | return LTTNG_TRACKER_ID_STATUS_INVALID; |
| 43 | } |
| 44 | |
| 45 | id->type = LTTNG_ID_VALUE; |
| 46 | id->value = value; |
| 47 | return LTTNG_TRACKER_ID_STATUS_OK; |
| 48 | } |
| 49 | |
| 50 | enum lttng_tracker_id_status lttng_tracker_id_set_string( |
| 51 | struct lttng_tracker_id *id, const char *value) |
| 52 | { |
| 53 | assert(id); |
| 54 | assert(value); |
| 55 | |
| 56 | id->type = LTTNG_ID_STRING; |
| 57 | id->string = strdup(value); |
| 58 | if (id->string == NULL) { |
| 59 | /* No memory left */ |
| 60 | goto error; |
| 61 | } |
| 62 | |
| 63 | return LTTNG_TRACKER_ID_STATUS_OK; |
| 64 | error: |
| 65 | return LTTNG_TRACKER_ID_STATUS_INVALID; |
| 66 | } |
| 67 | |
| 68 | enum lttng_tracker_id_status lttng_tracker_id_set_all( |
| 69 | struct lttng_tracker_id *id) |
| 70 | { |
| 71 | assert(id); |
| 72 | |
| 73 | id->type = LTTNG_ID_ALL; |
| 74 | |
| 75 | return LTTNG_TRACKER_ID_STATUS_OK; |
| 76 | } |
| 77 | |
| 78 | static void lttng_tracker_id_reset(struct lttng_tracker_id *id) |
| 79 | { |
| 80 | if (id == NULL) { |
| 81 | return; |
| 82 | } |
| 83 | |
| 84 | if (id->string != NULL) { |
| 85 | free(id->string); |
| 86 | id->string = NULL; |
| 87 | } |
| 88 | |
| 89 | id->type = LTTNG_ID_UNKNOWN; |
| 90 | id->value = -1; |
| 91 | } |
| 92 | |
| 93 | void lttng_tracker_id_destroy(struct lttng_tracker_id *id) |
| 94 | { |
| 95 | if (id == NULL) { |
| 96 | return; |
| 97 | } |
| 98 | |
| 99 | lttng_tracker_id_reset(id); |
| 100 | |
| 101 | free(id); |
| 102 | } |
| 103 | |
| 104 | enum lttng_tracker_id_type lttng_tracker_id_get_type( |
| 105 | const struct lttng_tracker_id *id) |
| 106 | { |
| 107 | assert(id); |
| 108 | return id->type; |
| 109 | } |
| 110 | |
| 111 | enum lttng_tracker_id_status lttng_tracker_id_get_value( |
| 112 | const struct lttng_tracker_id *id, int *value) |
| 113 | { |
| 114 | assert(id); |
| 115 | if (id->type == LTTNG_ID_UNKNOWN) { |
| 116 | return LTTNG_TRACKER_ID_STATUS_UNSET; |
| 117 | } |
| 118 | |
| 119 | if (id->type != LTTNG_ID_VALUE) { |
| 120 | return LTTNG_TRACKER_ID_STATUS_INVALID; |
| 121 | } |
| 122 | |
| 123 | *value = id->value; |
| 124 | return LTTNG_TRACKER_ID_STATUS_OK; |
| 125 | } |
| 126 | |
| 127 | bool lttng_tracker_id_is_equal(const struct lttng_tracker_id *left, |
| 128 | const struct lttng_tracker_id *right) |
| 129 | { |
| 130 | if (left->type != right->type) { |
| 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | switch (left->type) { |
| 135 | case LTTNG_ID_ALL: |
| 136 | return 1; |
| 137 | case LTTNG_ID_VALUE: |
| 138 | if (left->value != right->value) { |
| 139 | return 0; |
| 140 | } |
| 141 | break; |
| 142 | case LTTNG_ID_STRING: |
| 143 | if (strcmp(left->string, right->string) != 0) { |
| 144 | return 0; |
| 145 | } |
| 146 | break; |
| 147 | default: |
| 148 | /* |
| 149 | * Normally this should return true, but comparing unset tracker |
| 150 | * id is "invalid". |
| 151 | */ |
| 152 | return 0; |
| 153 | } |
| 154 | return 1; |
| 155 | } |
| 156 | |
| 157 | int lttng_tracker_id_copy(struct lttng_tracker_id *dest, |
| 158 | const struct lttng_tracker_id *orig) |
| 159 | { |
| 160 | int ret = 0; |
| 161 | enum lttng_tracker_id_status status; |
| 162 | |
| 163 | assert(dest); |
| 164 | assert(orig); |
| 165 | |
| 166 | switch (orig->type) { |
| 167 | case LTTNG_ID_ALL: |
| 168 | status = lttng_tracker_id_set_all(dest); |
| 169 | break; |
| 170 | case LTTNG_ID_VALUE: |
| 171 | status = lttng_tracker_id_set_value(dest, orig->value); |
| 172 | break; |
| 173 | case LTTNG_ID_STRING: |
| 174 | status = lttng_tracker_id_set_string(dest, orig->string); |
| 175 | break; |
| 176 | default: |
| 177 | status = LTTNG_TRACKER_ID_STATUS_OK; |
| 178 | break; |
| 179 | } |
| 180 | |
| 181 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { |
| 182 | ret = -1; |
| 183 | goto error; |
| 184 | } |
| 185 | error: |
| 186 | return ret; |
| 187 | } |
| 188 | |
| 189 | struct lttng_tracker_id *lttng_tracker_id_duplicate( |
| 190 | const struct lttng_tracker_id *orig) |
| 191 | { |
| 192 | int ret; |
| 193 | struct lttng_tracker_id *copy = NULL; |
| 194 | |
| 195 | copy = lttng_tracker_id_create(); |
| 196 | if (copy == NULL) { |
| 197 | goto error; |
| 198 | } |
| 199 | |
| 200 | ret = lttng_tracker_id_copy(copy, orig); |
| 201 | if (ret) { |
| 202 | goto error; |
| 203 | } |
| 204 | |
| 205 | return copy; |
| 206 | error: |
| 207 | lttng_tracker_id_destroy(copy); |
| 208 | return NULL; |
| 209 | } |
| 210 | |
| 211 | enum lttng_tracker_id_status lttng_tracker_id_get_string( |
| 212 | const struct lttng_tracker_id *id, const char **value) |
| 213 | { |
| 214 | assert(id); |
| 215 | if (id->type == LTTNG_ID_UNKNOWN) { |
| 216 | *value = NULL; |
| 217 | return LTTNG_TRACKER_ID_STATUS_UNSET; |
| 218 | } |
| 219 | |
| 220 | if (id->type != LTTNG_ID_STRING) { |
| 221 | *value = NULL; |
| 222 | return LTTNG_TRACKER_ID_STATUS_INVALID; |
| 223 | } |
| 224 | |
| 225 | *value = id->string; |
| 226 | return LTTNG_TRACKER_ID_STATUS_OK; |
| 227 | } |
| 228 | |
| 229 | struct lttng_tracker_ids *lttng_tracker_ids_create(unsigned int count) |
| 230 | { |
| 231 | struct lttng_tracker_ids *ids = NULL; |
| 232 | |
| 233 | ids = zmalloc(sizeof(*ids)); |
| 234 | if (!ids) { |
| 235 | goto error; |
| 236 | } |
| 237 | |
| 238 | ids->id_array = zmalloc(sizeof(struct lttng_tracker_id) * count); |
| 239 | if (!ids->id_array) { |
| 240 | goto error; |
| 241 | } |
| 242 | |
| 243 | ids->count = count; |
| 244 | |
| 245 | return ids; |
| 246 | error: |
| 247 | free(ids); |
| 248 | return NULL; |
| 249 | } |
| 250 | |
| 251 | LTTNG_HIDDEN |
| 252 | struct lttng_tracker_id *lttng_tracker_ids_get_pointer_of_index( |
| 253 | const struct lttng_tracker_ids *ids, unsigned int index) |
| 254 | { |
| 255 | assert(ids); |
| 256 | if (index >= ids->count) { |
| 257 | return NULL; |
| 258 | } |
| 259 | |
| 260 | return &ids->id_array[index]; |
| 261 | } |
| 262 | |
| 263 | const struct lttng_tracker_id *lttng_tracker_ids_get_at_index( |
| 264 | const struct lttng_tracker_ids *ids, unsigned int index) |
| 265 | { |
| 266 | assert(ids); |
| 267 | return lttng_tracker_ids_get_pointer_of_index(ids, index); |
| 268 | } |
| 269 | |
| 270 | enum lttng_tracker_id_status lttng_tracker_ids_get_count(const struct lttng_tracker_ids *ids, unsigned int *count) |
| 271 | { |
| 272 | |
| 273 | enum lttng_tracker_id_status status = LTTNG_TRACKER_ID_STATUS_OK; |
| 274 | |
| 275 | if (!ids || !count) { |
| 276 | status = LTTNG_TRACKER_ID_STATUS_INVALID; |
| 277 | goto end; |
| 278 | } |
| 279 | |
| 280 | *count = ids->count; |
| 281 | end: |
| 282 | return status; |
| 283 | } |
| 284 | |
| 285 | void lttng_tracker_ids_destroy(struct lttng_tracker_ids *ids) |
| 286 | { |
| 287 | int i; |
| 288 | |
| 289 | if (!ids) { |
| 290 | return; |
| 291 | } |
| 292 | |
| 293 | for (i = 0; i < ids->count; i++) { |
| 294 | lttng_tracker_id_reset(&ids->id_array[i]); |
| 295 | } |
| 296 | free(ids->id_array); |
| 297 | free(ids); |
| 298 | } |
| 299 | |
| 300 | int lttng_tracker_ids_serialize(const struct lttng_tracker_ids *ids, |
| 301 | struct lttng_dynamic_buffer *buffer) |
| 302 | { |
| 303 | int ret = 0; |
| 304 | int value; |
| 305 | const char *string = NULL; |
| 306 | unsigned int count; |
| 307 | enum lttng_tracker_id_status status; |
| 308 | const struct lttng_tracker_id *id; |
| 309 | unsigned int i; |
| 310 | |
| 311 | status = lttng_tracker_ids_get_count(ids, &count); |
| 312 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { |
| 313 | ret = LTTNG_ERR_INVALID; |
| 314 | goto error; |
| 315 | } |
| 316 | |
| 317 | for (i = 0; i < count; i++) { |
| 318 | struct lttcomm_tracker_id_header id_hdr; |
| 319 | size_t var_data_len = 0; |
| 320 | |
| 321 | id = lttng_tracker_ids_get_at_index(ids, i); |
| 322 | if (!id) { |
| 323 | ret = -LTTNG_ERR_INVALID; |
| 324 | goto error; |
| 325 | } |
| 326 | |
| 327 | memset(&id_hdr, 0, sizeof(id_hdr)); |
| 328 | id_hdr.type = lttng_tracker_id_get_type(id); |
| 329 | switch (id_hdr.type) { |
| 330 | case LTTNG_ID_ALL: |
| 331 | break; |
| 332 | case LTTNG_ID_VALUE: |
| 333 | status = lttng_tracker_id_get_value(id, &value); |
| 334 | id_hdr.u.value = value; |
| 335 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { |
| 336 | ret = -LTTNG_ERR_INVALID; |
| 337 | goto error; |
| 338 | } |
| 339 | break; |
| 340 | case LTTNG_ID_STRING: |
| 341 | status = lttng_tracker_id_get_string( |
| 342 | id, &string); |
| 343 | if (status != LTTNG_TRACKER_ID_STATUS_OK) { |
| 344 | ret = -LTTNG_ERR_INVALID; |
| 345 | goto error; |
| 346 | } |
| 347 | |
| 348 | id_hdr.u.var_data_len = var_data_len = |
| 349 | strlen(string) + 1; |
| 350 | break; |
| 351 | default: |
| 352 | ret = -LTTNG_ERR_INVALID; |
| 353 | goto error; |
| 354 | } |
| 355 | ret = lttng_dynamic_buffer_append( |
| 356 | buffer, &id_hdr, sizeof(id_hdr)); |
| 357 | if (ret) { |
| 358 | ret = -LTTNG_ERR_NOMEM; |
| 359 | goto error; |
| 360 | } |
| 361 | ret = lttng_dynamic_buffer_append( |
| 362 | buffer, string, var_data_len); |
| 363 | if (ret) { |
| 364 | ret = -LTTNG_ERR_NOMEM; |
| 365 | goto error; |
| 366 | } |
| 367 | } |
| 368 | error: |
| 369 | return ret; |
| 370 | } |