Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> |
| 3 | * |
| 4 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU Lesser General Public |
| 7 | * License as published by the Free Software Foundation; |
| 8 | * version 2.1 of the License (not later!) |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU Lesser General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU Lesser General Public |
Jon Stanley | 7b9f6b4 | 2012-09-07 16:32:46 -0400 | [diff] [blame] | 16 | * License along with this program; if not, see <http://www.gnu.org/licenses> |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 17 | * |
| 18 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 19 | */ |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.h> |
| 23 | #include <stdarg.h> |
| 24 | #include <errno.h> |
| 25 | #include <sys/types.h> |
| 26 | |
| 27 | #include "event-parse.h" |
| 28 | #include "event-utils.h" |
| 29 | |
| 30 | #define COMM "COMM" |
| 31 | |
| 32 | static struct format_field comm = { |
| 33 | .name = "COMM", |
| 34 | }; |
| 35 | |
| 36 | struct event_list { |
| 37 | struct event_list *next; |
| 38 | struct event_format *event; |
| 39 | }; |
| 40 | |
| 41 | #define MAX_ERR_STR_SIZE 256 |
| 42 | |
| 43 | static void show_error(char **error_str, const char *fmt, ...) |
| 44 | { |
| 45 | unsigned long long index; |
| 46 | const char *input; |
| 47 | char *error; |
| 48 | va_list ap; |
| 49 | int len; |
| 50 | int i; |
| 51 | |
| 52 | if (!error_str) |
| 53 | return; |
| 54 | |
| 55 | input = pevent_get_input_buf(); |
| 56 | index = pevent_get_input_buf_ptr(); |
| 57 | len = input ? strlen(input) : 0; |
| 58 | |
Namhyung Kim | 9451a2f | 2013-12-12 16:36:04 +0900 | [diff] [blame] | 59 | error = malloc(MAX_ERR_STR_SIZE + (len*2) + 3); |
| 60 | if (error == NULL) { |
| 61 | /* |
| 62 | * Maybe it's due to len is too long. |
| 63 | * Retry without the input buffer part. |
| 64 | */ |
| 65 | len = 0; |
| 66 | |
| 67 | error = malloc(MAX_ERR_STR_SIZE); |
| 68 | if (error == NULL) { |
| 69 | /* no memory */ |
| 70 | *error_str = NULL; |
| 71 | return; |
| 72 | } |
| 73 | } |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 74 | |
| 75 | if (len) { |
| 76 | strcpy(error, input); |
| 77 | error[len] = '\n'; |
| 78 | for (i = 1; i < len && i < index; i++) |
| 79 | error[len+i] = ' '; |
| 80 | error[len + i] = '^'; |
| 81 | error[len + i + 1] = '\n'; |
| 82 | len += i+2; |
| 83 | } |
| 84 | |
| 85 | va_start(ap, fmt); |
| 86 | vsnprintf(error + len, MAX_ERR_STR_SIZE, fmt, ap); |
| 87 | va_end(ap); |
| 88 | |
| 89 | *error_str = error; |
| 90 | } |
| 91 | |
| 92 | static void free_token(char *token) |
| 93 | { |
| 94 | pevent_free_token(token); |
| 95 | } |
| 96 | |
| 97 | static enum event_type read_token(char **tok) |
| 98 | { |
| 99 | enum event_type type; |
| 100 | char *token = NULL; |
| 101 | |
| 102 | do { |
| 103 | free_token(token); |
| 104 | type = pevent_read_token(&token); |
| 105 | } while (type == EVENT_NEWLINE || type == EVENT_SPACE); |
| 106 | |
| 107 | /* If token is = or ! check to see if the next char is ~ */ |
| 108 | if (token && |
| 109 | (strcmp(token, "=") == 0 || strcmp(token, "!") == 0) && |
| 110 | pevent_peek_char() == '~') { |
| 111 | /* append it */ |
Namhyung Kim | 91dfa49 | 2013-12-12 16:36:07 +0900 | [diff] [blame] | 112 | *tok = malloc(3); |
| 113 | if (*tok == NULL) { |
| 114 | free_token(token); |
| 115 | return EVENT_ERROR; |
| 116 | } |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 117 | sprintf(*tok, "%c%c", *token, '~'); |
| 118 | free_token(token); |
| 119 | /* Now remove the '~' from the buffer */ |
| 120 | pevent_read_token(&token); |
| 121 | free_token(token); |
| 122 | } else |
| 123 | *tok = token; |
| 124 | |
| 125 | return type; |
| 126 | } |
| 127 | |
| 128 | static int filter_cmp(const void *a, const void *b) |
| 129 | { |
| 130 | const struct filter_type *ea = a; |
| 131 | const struct filter_type *eb = b; |
| 132 | |
| 133 | if (ea->event_id < eb->event_id) |
| 134 | return -1; |
| 135 | |
| 136 | if (ea->event_id > eb->event_id) |
| 137 | return 1; |
| 138 | |
| 139 | return 0; |
| 140 | } |
| 141 | |
| 142 | static struct filter_type * |
| 143 | find_filter_type(struct event_filter *filter, int id) |
| 144 | { |
| 145 | struct filter_type *filter_type; |
| 146 | struct filter_type key; |
| 147 | |
| 148 | key.event_id = id; |
| 149 | |
| 150 | filter_type = bsearch(&key, filter->event_filters, |
| 151 | filter->filters, |
| 152 | sizeof(*filter->event_filters), |
| 153 | filter_cmp); |
| 154 | |
| 155 | return filter_type; |
| 156 | } |
| 157 | |
| 158 | static struct filter_type * |
| 159 | add_filter_type(struct event_filter *filter, int id) |
| 160 | { |
| 161 | struct filter_type *filter_type; |
| 162 | int i; |
| 163 | |
| 164 | filter_type = find_filter_type(filter, id); |
| 165 | if (filter_type) |
| 166 | return filter_type; |
| 167 | |
Namhyung Kim | ef3072c | 2013-12-12 16:36:05 +0900 | [diff] [blame] | 168 | filter_type = realloc(filter->event_filters, |
| 169 | sizeof(*filter->event_filters) * |
| 170 | (filter->filters + 1)); |
| 171 | if (!filter_type) |
| 172 | return NULL; |
| 173 | |
| 174 | filter->event_filters = filter_type; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 175 | |
| 176 | for (i = 0; i < filter->filters; i++) { |
| 177 | if (filter->event_filters[i].event_id > id) |
| 178 | break; |
| 179 | } |
| 180 | |
| 181 | if (i < filter->filters) |
| 182 | memmove(&filter->event_filters[i+1], |
| 183 | &filter->event_filters[i], |
| 184 | sizeof(*filter->event_filters) * |
| 185 | (filter->filters - i)); |
| 186 | |
| 187 | filter_type = &filter->event_filters[i]; |
| 188 | filter_type->event_id = id; |
| 189 | filter_type->event = pevent_find_event(filter->pevent, id); |
| 190 | filter_type->filter = NULL; |
| 191 | |
| 192 | filter->filters++; |
| 193 | |
| 194 | return filter_type; |
| 195 | } |
| 196 | |
| 197 | /** |
| 198 | * pevent_filter_alloc - create a new event filter |
| 199 | * @pevent: The pevent that this filter is associated with |
| 200 | */ |
| 201 | struct event_filter *pevent_filter_alloc(struct pevent *pevent) |
| 202 | { |
| 203 | struct event_filter *filter; |
| 204 | |
Namhyung Kim | 4f24416 | 2013-12-09 14:34:00 +0900 | [diff] [blame] | 205 | filter = malloc(sizeof(*filter)); |
| 206 | if (filter == NULL) |
| 207 | return NULL; |
| 208 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 209 | memset(filter, 0, sizeof(*filter)); |
| 210 | filter->pevent = pevent; |
| 211 | pevent_ref(pevent); |
| 212 | |
| 213 | return filter; |
| 214 | } |
| 215 | |
| 216 | static struct filter_arg *allocate_arg(void) |
| 217 | { |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 218 | return calloc(1, sizeof(struct filter_arg)); |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | static void free_arg(struct filter_arg *arg) |
| 222 | { |
| 223 | if (!arg) |
| 224 | return; |
| 225 | |
| 226 | switch (arg->type) { |
| 227 | case FILTER_ARG_NONE: |
| 228 | case FILTER_ARG_BOOLEAN: |
Steven Rostedt | 743df75 | 2012-10-01 20:23:28 -0400 | [diff] [blame] | 229 | break; |
| 230 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 231 | case FILTER_ARG_NUM: |
Steven Rostedt | 743df75 | 2012-10-01 20:23:28 -0400 | [diff] [blame] | 232 | free_arg(arg->num.left); |
| 233 | free_arg(arg->num.right); |
| 234 | break; |
| 235 | |
| 236 | case FILTER_ARG_EXP: |
| 237 | free_arg(arg->exp.left); |
| 238 | free_arg(arg->exp.right); |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 239 | break; |
| 240 | |
| 241 | case FILTER_ARG_STR: |
| 242 | free(arg->str.val); |
| 243 | regfree(&arg->str.reg); |
| 244 | free(arg->str.buffer); |
| 245 | break; |
| 246 | |
Steven Rostedt | 743df75 | 2012-10-01 20:23:28 -0400 | [diff] [blame] | 247 | case FILTER_ARG_VALUE: |
| 248 | if (arg->value.type == FILTER_STRING || |
| 249 | arg->value.type == FILTER_CHAR) |
| 250 | free(arg->value.str); |
| 251 | break; |
| 252 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 253 | case FILTER_ARG_OP: |
| 254 | free_arg(arg->op.left); |
| 255 | free_arg(arg->op.right); |
| 256 | default: |
| 257 | break; |
| 258 | } |
| 259 | |
| 260 | free(arg); |
| 261 | } |
| 262 | |
Namhyung Kim | 234520d | 2013-12-09 14:34:04 +0900 | [diff] [blame] | 263 | static int add_event(struct event_list **events, |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 264 | struct event_format *event) |
| 265 | { |
| 266 | struct event_list *list; |
| 267 | |
Namhyung Kim | 234520d | 2013-12-09 14:34:04 +0900 | [diff] [blame] | 268 | list = malloc(sizeof(*list)); |
| 269 | if (list == NULL) |
| 270 | return -1; |
| 271 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 272 | list->next = *events; |
| 273 | *events = list; |
| 274 | list->event = event; |
Namhyung Kim | 234520d | 2013-12-09 14:34:04 +0900 | [diff] [blame] | 275 | return 0; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | static int event_match(struct event_format *event, |
| 279 | regex_t *sreg, regex_t *ereg) |
| 280 | { |
| 281 | if (sreg) { |
| 282 | return !regexec(sreg, event->system, 0, NULL, 0) && |
| 283 | !regexec(ereg, event->name, 0, NULL, 0); |
| 284 | } |
| 285 | |
| 286 | return !regexec(ereg, event->system, 0, NULL, 0) || |
| 287 | !regexec(ereg, event->name, 0, NULL, 0); |
| 288 | } |
| 289 | |
Namhyung Kim | 605b8fd | 2013-12-12 16:36:08 +0900 | [diff] [blame] | 290 | static enum pevent_errno |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 291 | find_event(struct pevent *pevent, struct event_list **events, |
| 292 | char *sys_name, char *event_name) |
| 293 | { |
| 294 | struct event_format *event; |
| 295 | regex_t ereg; |
| 296 | regex_t sreg; |
| 297 | int match = 0; |
Namhyung Kim | 234520d | 2013-12-09 14:34:04 +0900 | [diff] [blame] | 298 | int fail = 0; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 299 | char *reg; |
| 300 | int ret; |
| 301 | int i; |
| 302 | |
| 303 | if (!event_name) { |
| 304 | /* if no name is given, then swap sys and name */ |
| 305 | event_name = sys_name; |
| 306 | sys_name = NULL; |
| 307 | } |
| 308 | |
Namhyung Kim | 605b8fd | 2013-12-12 16:36:08 +0900 | [diff] [blame] | 309 | reg = malloc(strlen(event_name) + 3); |
| 310 | if (reg == NULL) |
| 311 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; |
| 312 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 313 | sprintf(reg, "^%s$", event_name); |
| 314 | |
| 315 | ret = regcomp(&ereg, reg, REG_ICASE|REG_NOSUB); |
| 316 | free(reg); |
| 317 | |
| 318 | if (ret) |
Namhyung Kim | 605b8fd | 2013-12-12 16:36:08 +0900 | [diff] [blame] | 319 | return PEVENT_ERRNO__INVALID_EVENT_NAME; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 320 | |
| 321 | if (sys_name) { |
Namhyung Kim | 605b8fd | 2013-12-12 16:36:08 +0900 | [diff] [blame] | 322 | reg = malloc(strlen(sys_name) + 3); |
| 323 | if (reg == NULL) { |
| 324 | regfree(&ereg); |
| 325 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; |
| 326 | } |
| 327 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 328 | sprintf(reg, "^%s$", sys_name); |
| 329 | ret = regcomp(&sreg, reg, REG_ICASE|REG_NOSUB); |
| 330 | free(reg); |
| 331 | if (ret) { |
| 332 | regfree(&ereg); |
Namhyung Kim | 605b8fd | 2013-12-12 16:36:08 +0900 | [diff] [blame] | 333 | return PEVENT_ERRNO__INVALID_EVENT_NAME; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 334 | } |
| 335 | } |
| 336 | |
| 337 | for (i = 0; i < pevent->nr_events; i++) { |
| 338 | event = pevent->events[i]; |
| 339 | if (event_match(event, sys_name ? &sreg : NULL, &ereg)) { |
| 340 | match = 1; |
Namhyung Kim | 234520d | 2013-12-09 14:34:04 +0900 | [diff] [blame] | 341 | if (add_event(events, event) < 0) { |
| 342 | fail = 1; |
| 343 | break; |
| 344 | } |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 345 | } |
| 346 | } |
| 347 | |
| 348 | regfree(&ereg); |
| 349 | if (sys_name) |
| 350 | regfree(&sreg); |
| 351 | |
| 352 | if (!match) |
Namhyung Kim | 605b8fd | 2013-12-12 16:36:08 +0900 | [diff] [blame] | 353 | return PEVENT_ERRNO__EVENT_NOT_FOUND; |
Namhyung Kim | 234520d | 2013-12-09 14:34:04 +0900 | [diff] [blame] | 354 | if (fail) |
Namhyung Kim | 605b8fd | 2013-12-12 16:36:08 +0900 | [diff] [blame] | 355 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 356 | |
| 357 | return 0; |
| 358 | } |
| 359 | |
| 360 | static void free_events(struct event_list *events) |
| 361 | { |
| 362 | struct event_list *event; |
| 363 | |
| 364 | while (events) { |
| 365 | event = events; |
| 366 | events = events->next; |
| 367 | free(event); |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | static struct filter_arg * |
Namhyung Kim | eaec12d | 2012-05-23 11:36:56 +0900 | [diff] [blame] | 372 | create_arg_item(struct event_format *event, const char *token, |
| 373 | enum event_type type, char **error_str) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 374 | { |
| 375 | struct format_field *field; |
| 376 | struct filter_arg *arg; |
| 377 | |
| 378 | arg = allocate_arg(); |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 379 | if (arg == NULL) { |
| 380 | show_error(error_str, "failed to allocate filter arg"); |
| 381 | return NULL; |
| 382 | } |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 383 | |
| 384 | switch (type) { |
| 385 | |
| 386 | case EVENT_SQUOTE: |
| 387 | case EVENT_DQUOTE: |
| 388 | arg->type = FILTER_ARG_VALUE; |
| 389 | arg->value.type = |
| 390 | type == EVENT_DQUOTE ? FILTER_STRING : FILTER_CHAR; |
| 391 | arg->value.str = strdup(token); |
Namhyung Kim | 2036fcd | 2013-12-09 14:34:05 +0900 | [diff] [blame] | 392 | if (!arg->value.str) { |
| 393 | free_arg(arg); |
| 394 | show_error(error_str, "failed to allocate string filter arg"); |
| 395 | return NULL; |
| 396 | } |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 397 | break; |
| 398 | case EVENT_ITEM: |
| 399 | /* if it is a number, then convert it */ |
| 400 | if (isdigit(token[0])) { |
| 401 | arg->type = FILTER_ARG_VALUE; |
| 402 | arg->value.type = FILTER_NUMBER; |
| 403 | arg->value.val = strtoull(token, NULL, 0); |
| 404 | break; |
| 405 | } |
| 406 | /* Consider this a field */ |
| 407 | field = pevent_find_any_field(event, token); |
| 408 | if (!field) { |
| 409 | if (strcmp(token, COMM) != 0) { |
| 410 | /* not a field, Make it false */ |
| 411 | arg->type = FILTER_ARG_BOOLEAN; |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 412 | arg->boolean.value = FILTER_FALSE; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 413 | break; |
| 414 | } |
| 415 | /* If token is 'COMM' then it is special */ |
| 416 | field = &comm; |
| 417 | } |
| 418 | arg->type = FILTER_ARG_FIELD; |
| 419 | arg->field.field = field; |
| 420 | break; |
| 421 | default: |
| 422 | free_arg(arg); |
| 423 | show_error(error_str, "expected a value but found %s", |
| 424 | token); |
| 425 | return NULL; |
| 426 | } |
| 427 | return arg; |
| 428 | } |
| 429 | |
| 430 | static struct filter_arg * |
| 431 | create_arg_op(enum filter_op_type btype) |
| 432 | { |
| 433 | struct filter_arg *arg; |
| 434 | |
| 435 | arg = allocate_arg(); |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 436 | if (!arg) |
| 437 | return NULL; |
| 438 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 439 | arg->type = FILTER_ARG_OP; |
| 440 | arg->op.type = btype; |
| 441 | |
| 442 | return arg; |
| 443 | } |
| 444 | |
| 445 | static struct filter_arg * |
| 446 | create_arg_exp(enum filter_exp_type etype) |
| 447 | { |
| 448 | struct filter_arg *arg; |
| 449 | |
| 450 | arg = allocate_arg(); |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 451 | if (!arg) |
| 452 | return NULL; |
| 453 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 454 | arg->type = FILTER_ARG_EXP; |
| 455 | arg->op.type = etype; |
| 456 | |
| 457 | return arg; |
| 458 | } |
| 459 | |
| 460 | static struct filter_arg * |
| 461 | create_arg_cmp(enum filter_exp_type etype) |
| 462 | { |
| 463 | struct filter_arg *arg; |
| 464 | |
| 465 | arg = allocate_arg(); |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 466 | if (!arg) |
| 467 | return NULL; |
| 468 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 469 | /* Use NUM and change if necessary */ |
| 470 | arg->type = FILTER_ARG_NUM; |
| 471 | arg->op.type = etype; |
| 472 | |
| 473 | return arg; |
| 474 | } |
| 475 | |
Namhyung Kim | 02d62d6 | 2013-12-12 16:36:09 +0900 | [diff] [blame] | 476 | static enum pevent_errno |
| 477 | add_right(struct filter_arg *op, struct filter_arg *arg, char **error_str) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 478 | { |
| 479 | struct filter_arg *left; |
| 480 | char *str; |
| 481 | int op_type; |
| 482 | int ret; |
| 483 | |
| 484 | switch (op->type) { |
| 485 | case FILTER_ARG_EXP: |
| 486 | if (op->exp.right) |
| 487 | goto out_fail; |
| 488 | op->exp.right = arg; |
| 489 | break; |
| 490 | |
| 491 | case FILTER_ARG_OP: |
| 492 | if (op->op.right) |
| 493 | goto out_fail; |
| 494 | op->op.right = arg; |
| 495 | break; |
| 496 | |
| 497 | case FILTER_ARG_NUM: |
| 498 | if (op->op.right) |
| 499 | goto out_fail; |
| 500 | /* |
| 501 | * The arg must be num, str, or field |
| 502 | */ |
| 503 | switch (arg->type) { |
| 504 | case FILTER_ARG_VALUE: |
| 505 | case FILTER_ARG_FIELD: |
| 506 | break; |
| 507 | default: |
Namhyung Kim | 02d62d6 | 2013-12-12 16:36:09 +0900 | [diff] [blame] | 508 | show_error(error_str, "Illegal rvalue"); |
| 509 | return PEVENT_ERRNO__ILLEGAL_RVALUE; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 510 | } |
| 511 | |
| 512 | /* |
| 513 | * Depending on the type, we may need to |
| 514 | * convert this to a string or regex. |
| 515 | */ |
| 516 | switch (arg->value.type) { |
| 517 | case FILTER_CHAR: |
| 518 | /* |
| 519 | * A char should be converted to number if |
| 520 | * the string is 1 byte, and the compare |
| 521 | * is not a REGEX. |
| 522 | */ |
| 523 | if (strlen(arg->value.str) == 1 && |
| 524 | op->num.type != FILTER_CMP_REGEX && |
| 525 | op->num.type != FILTER_CMP_NOT_REGEX) { |
| 526 | arg->value.type = FILTER_NUMBER; |
| 527 | goto do_int; |
| 528 | } |
| 529 | /* fall through */ |
| 530 | case FILTER_STRING: |
| 531 | |
| 532 | /* convert op to a string arg */ |
| 533 | op_type = op->num.type; |
| 534 | left = op->num.left; |
| 535 | str = arg->value.str; |
| 536 | |
| 537 | /* reset the op for the new field */ |
| 538 | memset(op, 0, sizeof(*op)); |
| 539 | |
| 540 | /* |
| 541 | * If left arg was a field not found then |
| 542 | * NULL the entire op. |
| 543 | */ |
| 544 | if (left->type == FILTER_ARG_BOOLEAN) { |
| 545 | free_arg(left); |
| 546 | free_arg(arg); |
| 547 | op->type = FILTER_ARG_BOOLEAN; |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 548 | op->boolean.value = FILTER_FALSE; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 549 | break; |
| 550 | } |
| 551 | |
| 552 | /* Left arg must be a field */ |
| 553 | if (left->type != FILTER_ARG_FIELD) { |
| 554 | show_error(error_str, |
| 555 | "Illegal lvalue for string comparison"); |
Namhyung Kim | 02d62d6 | 2013-12-12 16:36:09 +0900 | [diff] [blame] | 556 | return PEVENT_ERRNO__ILLEGAL_LVALUE; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | /* Make sure this is a valid string compare */ |
| 560 | switch (op_type) { |
| 561 | case FILTER_CMP_EQ: |
| 562 | op_type = FILTER_CMP_MATCH; |
| 563 | break; |
| 564 | case FILTER_CMP_NE: |
| 565 | op_type = FILTER_CMP_NOT_MATCH; |
| 566 | break; |
| 567 | |
| 568 | case FILTER_CMP_REGEX: |
| 569 | case FILTER_CMP_NOT_REGEX: |
| 570 | ret = regcomp(&op->str.reg, str, REG_ICASE|REG_NOSUB); |
| 571 | if (ret) { |
| 572 | show_error(error_str, |
| 573 | "RegEx '%s' did not compute", |
| 574 | str); |
Namhyung Kim | 02d62d6 | 2013-12-12 16:36:09 +0900 | [diff] [blame] | 575 | return PEVENT_ERRNO__INVALID_REGEX; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 576 | } |
| 577 | break; |
| 578 | default: |
| 579 | show_error(error_str, |
| 580 | "Illegal comparison for string"); |
Namhyung Kim | 02d62d6 | 2013-12-12 16:36:09 +0900 | [diff] [blame] | 581 | return PEVENT_ERRNO__ILLEGAL_STRING_CMP; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | op->type = FILTER_ARG_STR; |
| 585 | op->str.type = op_type; |
| 586 | op->str.field = left->field.field; |
| 587 | op->str.val = strdup(str); |
Namhyung Kim | 02d62d6 | 2013-12-12 16:36:09 +0900 | [diff] [blame] | 588 | if (!op->str.val) { |
| 589 | show_error(error_str, "Failed to allocate string filter"); |
| 590 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; |
| 591 | } |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 592 | /* |
| 593 | * Need a buffer to copy data for tests |
| 594 | */ |
Namhyung Kim | 02d62d6 | 2013-12-12 16:36:09 +0900 | [diff] [blame] | 595 | op->str.buffer = malloc(op->str.field->size + 1); |
| 596 | if (!op->str.buffer) { |
| 597 | show_error(error_str, "Failed to allocate string filter"); |
| 598 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; |
| 599 | } |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 600 | /* Null terminate this buffer */ |
| 601 | op->str.buffer[op->str.field->size] = 0; |
| 602 | |
| 603 | /* We no longer have left or right args */ |
| 604 | free_arg(arg); |
| 605 | free_arg(left); |
| 606 | |
| 607 | break; |
| 608 | |
| 609 | case FILTER_NUMBER: |
| 610 | |
| 611 | do_int: |
| 612 | switch (op->num.type) { |
| 613 | case FILTER_CMP_REGEX: |
| 614 | case FILTER_CMP_NOT_REGEX: |
| 615 | show_error(error_str, |
| 616 | "Op not allowed with integers"); |
Namhyung Kim | 02d62d6 | 2013-12-12 16:36:09 +0900 | [diff] [blame] | 617 | return PEVENT_ERRNO__ILLEGAL_INTEGER_CMP; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 618 | |
| 619 | default: |
| 620 | break; |
| 621 | } |
| 622 | |
| 623 | /* numeric compare */ |
| 624 | op->num.right = arg; |
| 625 | break; |
| 626 | default: |
| 627 | goto out_fail; |
| 628 | } |
| 629 | break; |
| 630 | default: |
| 631 | goto out_fail; |
| 632 | } |
| 633 | |
| 634 | return 0; |
| 635 | |
| 636 | out_fail: |
Namhyung Kim | 02d62d6 | 2013-12-12 16:36:09 +0900 | [diff] [blame] | 637 | show_error(error_str, "Syntax error"); |
| 638 | return PEVENT_ERRNO__SYNTAX_ERROR; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 639 | } |
| 640 | |
| 641 | static struct filter_arg * |
| 642 | rotate_op_right(struct filter_arg *a, struct filter_arg *b) |
| 643 | { |
| 644 | struct filter_arg *arg; |
| 645 | |
| 646 | arg = a->op.right; |
| 647 | a->op.right = b; |
| 648 | return arg; |
| 649 | } |
| 650 | |
Namhyung Kim | ff533fc | 2013-12-12 16:36:10 +0900 | [diff] [blame^] | 651 | static enum pevent_errno add_left(struct filter_arg *op, struct filter_arg *arg) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 652 | { |
| 653 | switch (op->type) { |
| 654 | case FILTER_ARG_EXP: |
| 655 | if (arg->type == FILTER_ARG_OP) |
| 656 | arg = rotate_op_right(arg, op); |
| 657 | op->exp.left = arg; |
| 658 | break; |
| 659 | |
| 660 | case FILTER_ARG_OP: |
| 661 | op->op.left = arg; |
| 662 | break; |
| 663 | case FILTER_ARG_NUM: |
| 664 | if (arg->type == FILTER_ARG_OP) |
| 665 | arg = rotate_op_right(arg, op); |
| 666 | |
| 667 | /* left arg of compares must be a field */ |
| 668 | if (arg->type != FILTER_ARG_FIELD && |
| 669 | arg->type != FILTER_ARG_BOOLEAN) |
Namhyung Kim | ff533fc | 2013-12-12 16:36:10 +0900 | [diff] [blame^] | 670 | return PEVENT_ERRNO__INVALID_ARG_TYPE; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 671 | op->num.left = arg; |
| 672 | break; |
| 673 | default: |
Namhyung Kim | ff533fc | 2013-12-12 16:36:10 +0900 | [diff] [blame^] | 674 | return PEVENT_ERRNO__INVALID_ARG_TYPE; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 675 | } |
| 676 | return 0; |
| 677 | } |
| 678 | |
| 679 | enum op_type { |
| 680 | OP_NONE, |
| 681 | OP_BOOL, |
| 682 | OP_NOT, |
| 683 | OP_EXP, |
| 684 | OP_CMP, |
| 685 | }; |
| 686 | |
| 687 | static enum op_type process_op(const char *token, |
| 688 | enum filter_op_type *btype, |
| 689 | enum filter_cmp_type *ctype, |
| 690 | enum filter_exp_type *etype) |
| 691 | { |
| 692 | *btype = FILTER_OP_NOT; |
| 693 | *etype = FILTER_EXP_NONE; |
| 694 | *ctype = FILTER_CMP_NONE; |
| 695 | |
| 696 | if (strcmp(token, "&&") == 0) |
| 697 | *btype = FILTER_OP_AND; |
| 698 | else if (strcmp(token, "||") == 0) |
| 699 | *btype = FILTER_OP_OR; |
| 700 | else if (strcmp(token, "!") == 0) |
| 701 | return OP_NOT; |
| 702 | |
| 703 | if (*btype != FILTER_OP_NOT) |
| 704 | return OP_BOOL; |
| 705 | |
| 706 | /* Check for value expressions */ |
| 707 | if (strcmp(token, "+") == 0) { |
| 708 | *etype = FILTER_EXP_ADD; |
| 709 | } else if (strcmp(token, "-") == 0) { |
| 710 | *etype = FILTER_EXP_SUB; |
| 711 | } else if (strcmp(token, "*") == 0) { |
| 712 | *etype = FILTER_EXP_MUL; |
| 713 | } else if (strcmp(token, "/") == 0) { |
| 714 | *etype = FILTER_EXP_DIV; |
| 715 | } else if (strcmp(token, "%") == 0) { |
| 716 | *etype = FILTER_EXP_MOD; |
| 717 | } else if (strcmp(token, ">>") == 0) { |
| 718 | *etype = FILTER_EXP_RSHIFT; |
| 719 | } else if (strcmp(token, "<<") == 0) { |
| 720 | *etype = FILTER_EXP_LSHIFT; |
| 721 | } else if (strcmp(token, "&") == 0) { |
| 722 | *etype = FILTER_EXP_AND; |
| 723 | } else if (strcmp(token, "|") == 0) { |
| 724 | *etype = FILTER_EXP_OR; |
| 725 | } else if (strcmp(token, "^") == 0) { |
| 726 | *etype = FILTER_EXP_XOR; |
| 727 | } else if (strcmp(token, "~") == 0) |
| 728 | *etype = FILTER_EXP_NOT; |
| 729 | |
| 730 | if (*etype != FILTER_EXP_NONE) |
| 731 | return OP_EXP; |
| 732 | |
| 733 | /* Check for compares */ |
| 734 | if (strcmp(token, "==") == 0) |
| 735 | *ctype = FILTER_CMP_EQ; |
| 736 | else if (strcmp(token, "!=") == 0) |
| 737 | *ctype = FILTER_CMP_NE; |
| 738 | else if (strcmp(token, "<") == 0) |
| 739 | *ctype = FILTER_CMP_LT; |
| 740 | else if (strcmp(token, ">") == 0) |
| 741 | *ctype = FILTER_CMP_GT; |
| 742 | else if (strcmp(token, "<=") == 0) |
| 743 | *ctype = FILTER_CMP_LE; |
| 744 | else if (strcmp(token, ">=") == 0) |
| 745 | *ctype = FILTER_CMP_GE; |
| 746 | else if (strcmp(token, "=~") == 0) |
| 747 | *ctype = FILTER_CMP_REGEX; |
| 748 | else if (strcmp(token, "!~") == 0) |
| 749 | *ctype = FILTER_CMP_NOT_REGEX; |
| 750 | else |
| 751 | return OP_NONE; |
| 752 | |
| 753 | return OP_CMP; |
| 754 | } |
| 755 | |
| 756 | static int check_op_done(struct filter_arg *arg) |
| 757 | { |
| 758 | switch (arg->type) { |
| 759 | case FILTER_ARG_EXP: |
| 760 | return arg->exp.right != NULL; |
| 761 | |
| 762 | case FILTER_ARG_OP: |
| 763 | return arg->op.right != NULL; |
| 764 | |
| 765 | case FILTER_ARG_NUM: |
| 766 | return arg->num.right != NULL; |
| 767 | |
| 768 | case FILTER_ARG_STR: |
| 769 | /* A string conversion is always done */ |
| 770 | return 1; |
| 771 | |
| 772 | case FILTER_ARG_BOOLEAN: |
| 773 | /* field not found, is ok */ |
| 774 | return 1; |
| 775 | |
| 776 | default: |
| 777 | return 0; |
| 778 | } |
| 779 | } |
| 780 | |
| 781 | enum filter_vals { |
| 782 | FILTER_VAL_NORM, |
| 783 | FILTER_VAL_FALSE, |
| 784 | FILTER_VAL_TRUE, |
| 785 | }; |
| 786 | |
| 787 | void reparent_op_arg(struct filter_arg *parent, struct filter_arg *old_child, |
| 788 | struct filter_arg *arg) |
| 789 | { |
| 790 | struct filter_arg *other_child; |
| 791 | struct filter_arg **ptr; |
| 792 | |
| 793 | if (parent->type != FILTER_ARG_OP && |
| 794 | arg->type != FILTER_ARG_OP) |
| 795 | die("can not reparent other than OP"); |
| 796 | |
| 797 | /* Get the sibling */ |
| 798 | if (old_child->op.right == arg) { |
| 799 | ptr = &old_child->op.right; |
| 800 | other_child = old_child->op.left; |
| 801 | } else if (old_child->op.left == arg) { |
| 802 | ptr = &old_child->op.left; |
| 803 | other_child = old_child->op.right; |
| 804 | } else |
| 805 | die("Error in reparent op, find other child"); |
| 806 | |
| 807 | /* Detach arg from old_child */ |
| 808 | *ptr = NULL; |
| 809 | |
| 810 | /* Check for root */ |
| 811 | if (parent == old_child) { |
| 812 | free_arg(other_child); |
| 813 | *parent = *arg; |
| 814 | /* Free arg without recussion */ |
| 815 | free(arg); |
| 816 | return; |
| 817 | } |
| 818 | |
| 819 | if (parent->op.right == old_child) |
| 820 | ptr = &parent->op.right; |
| 821 | else if (parent->op.left == old_child) |
| 822 | ptr = &parent->op.left; |
| 823 | else |
| 824 | die("Error in reparent op"); |
| 825 | *ptr = arg; |
| 826 | |
| 827 | free_arg(old_child); |
| 828 | } |
| 829 | |
| 830 | enum filter_vals test_arg(struct filter_arg *parent, struct filter_arg *arg) |
| 831 | { |
| 832 | enum filter_vals lval, rval; |
| 833 | |
| 834 | switch (arg->type) { |
| 835 | |
| 836 | /* bad case */ |
| 837 | case FILTER_ARG_BOOLEAN: |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 838 | return FILTER_VAL_FALSE + arg->boolean.value; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 839 | |
| 840 | /* good cases: */ |
| 841 | case FILTER_ARG_STR: |
| 842 | case FILTER_ARG_VALUE: |
| 843 | case FILTER_ARG_FIELD: |
| 844 | return FILTER_VAL_NORM; |
| 845 | |
| 846 | case FILTER_ARG_EXP: |
| 847 | lval = test_arg(arg, arg->exp.left); |
| 848 | if (lval != FILTER_VAL_NORM) |
| 849 | return lval; |
| 850 | rval = test_arg(arg, arg->exp.right); |
| 851 | if (rval != FILTER_VAL_NORM) |
| 852 | return rval; |
| 853 | return FILTER_VAL_NORM; |
| 854 | |
| 855 | case FILTER_ARG_NUM: |
| 856 | lval = test_arg(arg, arg->num.left); |
| 857 | if (lval != FILTER_VAL_NORM) |
| 858 | return lval; |
| 859 | rval = test_arg(arg, arg->num.right); |
| 860 | if (rval != FILTER_VAL_NORM) |
| 861 | return rval; |
| 862 | return FILTER_VAL_NORM; |
| 863 | |
| 864 | case FILTER_ARG_OP: |
| 865 | if (arg->op.type != FILTER_OP_NOT) { |
| 866 | lval = test_arg(arg, arg->op.left); |
| 867 | switch (lval) { |
| 868 | case FILTER_VAL_NORM: |
| 869 | break; |
| 870 | case FILTER_VAL_TRUE: |
| 871 | if (arg->op.type == FILTER_OP_OR) |
| 872 | return FILTER_VAL_TRUE; |
| 873 | rval = test_arg(arg, arg->op.right); |
| 874 | if (rval != FILTER_VAL_NORM) |
| 875 | return rval; |
| 876 | |
| 877 | reparent_op_arg(parent, arg, arg->op.right); |
| 878 | return FILTER_VAL_NORM; |
| 879 | |
| 880 | case FILTER_VAL_FALSE: |
| 881 | if (arg->op.type == FILTER_OP_AND) |
| 882 | return FILTER_VAL_FALSE; |
| 883 | rval = test_arg(arg, arg->op.right); |
| 884 | if (rval != FILTER_VAL_NORM) |
| 885 | return rval; |
| 886 | |
| 887 | reparent_op_arg(parent, arg, arg->op.right); |
| 888 | return FILTER_VAL_NORM; |
| 889 | } |
| 890 | } |
| 891 | |
| 892 | rval = test_arg(arg, arg->op.right); |
| 893 | switch (rval) { |
| 894 | case FILTER_VAL_NORM: |
| 895 | break; |
| 896 | case FILTER_VAL_TRUE: |
| 897 | if (arg->op.type == FILTER_OP_OR) |
| 898 | return FILTER_VAL_TRUE; |
| 899 | if (arg->op.type == FILTER_OP_NOT) |
| 900 | return FILTER_VAL_FALSE; |
| 901 | |
| 902 | reparent_op_arg(parent, arg, arg->op.left); |
| 903 | return FILTER_VAL_NORM; |
| 904 | |
| 905 | case FILTER_VAL_FALSE: |
| 906 | if (arg->op.type == FILTER_OP_AND) |
| 907 | return FILTER_VAL_FALSE; |
| 908 | if (arg->op.type == FILTER_OP_NOT) |
| 909 | return FILTER_VAL_TRUE; |
| 910 | |
| 911 | reparent_op_arg(parent, arg, arg->op.left); |
| 912 | return FILTER_VAL_NORM; |
| 913 | } |
| 914 | |
| 915 | return FILTER_VAL_NORM; |
| 916 | default: |
| 917 | die("bad arg in filter tree"); |
| 918 | } |
| 919 | return FILTER_VAL_NORM; |
| 920 | } |
| 921 | |
| 922 | /* Remove any unknown event fields */ |
| 923 | static struct filter_arg *collapse_tree(struct filter_arg *arg) |
| 924 | { |
| 925 | enum filter_vals ret; |
| 926 | |
| 927 | ret = test_arg(arg, arg); |
| 928 | switch (ret) { |
| 929 | case FILTER_VAL_NORM: |
| 930 | return arg; |
| 931 | |
| 932 | case FILTER_VAL_TRUE: |
| 933 | case FILTER_VAL_FALSE: |
| 934 | free_arg(arg); |
| 935 | arg = allocate_arg(); |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 936 | if (arg) { |
| 937 | arg->type = FILTER_ARG_BOOLEAN; |
| 938 | arg->boolean.value = ret == FILTER_VAL_TRUE; |
| 939 | } |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 940 | } |
| 941 | |
| 942 | return arg; |
| 943 | } |
| 944 | |
| 945 | static int |
| 946 | process_filter(struct event_format *event, struct filter_arg **parg, |
| 947 | char **error_str, int not) |
| 948 | { |
| 949 | enum event_type type; |
| 950 | char *token = NULL; |
| 951 | struct filter_arg *current_op = NULL; |
| 952 | struct filter_arg *current_exp = NULL; |
| 953 | struct filter_arg *left_item = NULL; |
| 954 | struct filter_arg *arg = NULL; |
| 955 | enum op_type op_type; |
| 956 | enum filter_op_type btype; |
| 957 | enum filter_exp_type etype; |
| 958 | enum filter_cmp_type ctype; |
| 959 | int ret; |
| 960 | |
| 961 | *parg = NULL; |
| 962 | |
| 963 | do { |
| 964 | free(token); |
| 965 | type = read_token(&token); |
| 966 | switch (type) { |
| 967 | case EVENT_SQUOTE: |
| 968 | case EVENT_DQUOTE: |
| 969 | case EVENT_ITEM: |
| 970 | arg = create_arg_item(event, token, type, error_str); |
| 971 | if (!arg) |
| 972 | goto fail; |
| 973 | if (!left_item) |
| 974 | left_item = arg; |
| 975 | else if (current_exp) { |
| 976 | ret = add_right(current_exp, arg, error_str); |
| 977 | if (ret < 0) |
| 978 | goto fail; |
| 979 | left_item = NULL; |
| 980 | /* Not's only one one expression */ |
| 981 | if (not) { |
| 982 | arg = NULL; |
| 983 | if (current_op) |
| 984 | goto fail_print; |
| 985 | free(token); |
| 986 | *parg = current_exp; |
| 987 | return 0; |
| 988 | } |
| 989 | } else |
| 990 | goto fail_print; |
| 991 | arg = NULL; |
| 992 | break; |
| 993 | |
| 994 | case EVENT_DELIM: |
| 995 | if (*token == ',') { |
| 996 | show_error(error_str, |
| 997 | "Illegal token ','"); |
| 998 | goto fail; |
| 999 | } |
| 1000 | |
| 1001 | if (*token == '(') { |
| 1002 | if (left_item) { |
| 1003 | show_error(error_str, |
| 1004 | "Open paren can not come after item"); |
| 1005 | goto fail; |
| 1006 | } |
| 1007 | if (current_exp) { |
| 1008 | show_error(error_str, |
| 1009 | "Open paren can not come after expression"); |
| 1010 | goto fail; |
| 1011 | } |
| 1012 | |
| 1013 | ret = process_filter(event, &arg, error_str, 0); |
| 1014 | if (ret != 1) { |
| 1015 | if (ret == 0) |
| 1016 | show_error(error_str, |
| 1017 | "Unbalanced number of '('"); |
| 1018 | goto fail; |
| 1019 | } |
| 1020 | ret = 0; |
| 1021 | |
| 1022 | /* A not wants just one expression */ |
| 1023 | if (not) { |
| 1024 | if (current_op) |
| 1025 | goto fail_print; |
| 1026 | *parg = arg; |
| 1027 | return 0; |
| 1028 | } |
| 1029 | |
| 1030 | if (current_op) |
| 1031 | ret = add_right(current_op, arg, error_str); |
| 1032 | else |
| 1033 | current_exp = arg; |
| 1034 | |
| 1035 | if (ret < 0) |
| 1036 | goto fail; |
| 1037 | |
| 1038 | } else { /* ')' */ |
| 1039 | if (!current_op && !current_exp) |
| 1040 | goto fail_print; |
| 1041 | |
| 1042 | /* Make sure everything is finished at this level */ |
| 1043 | if (current_exp && !check_op_done(current_exp)) |
| 1044 | goto fail_print; |
| 1045 | if (current_op && !check_op_done(current_op)) |
| 1046 | goto fail_print; |
| 1047 | |
| 1048 | if (current_op) |
| 1049 | *parg = current_op; |
| 1050 | else |
| 1051 | *parg = current_exp; |
| 1052 | return 1; |
| 1053 | } |
| 1054 | break; |
| 1055 | |
| 1056 | case EVENT_OP: |
| 1057 | op_type = process_op(token, &btype, &ctype, &etype); |
| 1058 | |
| 1059 | /* All expect a left arg except for NOT */ |
| 1060 | switch (op_type) { |
| 1061 | case OP_BOOL: |
| 1062 | /* Logic ops need a left expression */ |
| 1063 | if (!current_exp && !current_op) |
| 1064 | goto fail_print; |
| 1065 | /* fall through */ |
| 1066 | case OP_NOT: |
| 1067 | /* logic only processes ops and exp */ |
| 1068 | if (left_item) |
| 1069 | goto fail_print; |
| 1070 | break; |
| 1071 | case OP_EXP: |
| 1072 | case OP_CMP: |
| 1073 | if (!left_item) |
| 1074 | goto fail_print; |
| 1075 | break; |
| 1076 | case OP_NONE: |
| 1077 | show_error(error_str, |
| 1078 | "Unknown op token %s", token); |
| 1079 | goto fail; |
| 1080 | } |
| 1081 | |
| 1082 | ret = 0; |
| 1083 | switch (op_type) { |
| 1084 | case OP_BOOL: |
| 1085 | arg = create_arg_op(btype); |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 1086 | if (arg == NULL) |
| 1087 | goto fail_alloc; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1088 | if (current_op) |
| 1089 | ret = add_left(arg, current_op); |
| 1090 | else |
| 1091 | ret = add_left(arg, current_exp); |
| 1092 | current_op = arg; |
| 1093 | current_exp = NULL; |
| 1094 | break; |
| 1095 | |
| 1096 | case OP_NOT: |
| 1097 | arg = create_arg_op(btype); |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 1098 | if (arg == NULL) |
| 1099 | goto fail_alloc; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1100 | if (current_op) |
| 1101 | ret = add_right(current_op, arg, error_str); |
| 1102 | if (ret < 0) |
| 1103 | goto fail; |
| 1104 | current_exp = arg; |
| 1105 | ret = process_filter(event, &arg, error_str, 1); |
| 1106 | if (ret < 0) |
| 1107 | goto fail; |
| 1108 | ret = add_right(current_exp, arg, error_str); |
| 1109 | if (ret < 0) |
| 1110 | goto fail; |
| 1111 | break; |
| 1112 | |
| 1113 | case OP_EXP: |
| 1114 | case OP_CMP: |
| 1115 | if (op_type == OP_EXP) |
| 1116 | arg = create_arg_exp(etype); |
| 1117 | else |
| 1118 | arg = create_arg_cmp(ctype); |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 1119 | if (arg == NULL) |
| 1120 | goto fail_alloc; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1121 | |
| 1122 | if (current_op) |
| 1123 | ret = add_right(current_op, arg, error_str); |
| 1124 | if (ret < 0) |
| 1125 | goto fail; |
| 1126 | ret = add_left(arg, left_item); |
| 1127 | if (ret < 0) { |
| 1128 | arg = NULL; |
| 1129 | goto fail_print; |
| 1130 | } |
| 1131 | current_exp = arg; |
| 1132 | break; |
| 1133 | default: |
| 1134 | break; |
| 1135 | } |
| 1136 | arg = NULL; |
| 1137 | if (ret < 0) |
| 1138 | goto fail_print; |
| 1139 | break; |
| 1140 | case EVENT_NONE: |
| 1141 | break; |
Namhyung Kim | 91dfa49 | 2013-12-12 16:36:07 +0900 | [diff] [blame] | 1142 | case EVENT_ERROR: |
| 1143 | goto fail_alloc; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1144 | default: |
| 1145 | goto fail_print; |
| 1146 | } |
| 1147 | } while (type != EVENT_NONE); |
| 1148 | |
| 1149 | if (!current_op && !current_exp) |
| 1150 | goto fail_print; |
| 1151 | |
| 1152 | if (!current_op) |
| 1153 | current_op = current_exp; |
| 1154 | |
| 1155 | current_op = collapse_tree(current_op); |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 1156 | if (current_op == NULL) |
| 1157 | goto fail_alloc; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1158 | |
| 1159 | *parg = current_op; |
| 1160 | |
| 1161 | return 0; |
| 1162 | |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 1163 | fail_alloc: |
| 1164 | show_error(error_str, "failed to allocate filter arg"); |
| 1165 | goto fail; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1166 | fail_print: |
| 1167 | show_error(error_str, "Syntax error"); |
| 1168 | fail: |
| 1169 | free_arg(current_op); |
| 1170 | free_arg(current_exp); |
| 1171 | free_arg(arg); |
| 1172 | free(token); |
| 1173 | return -1; |
| 1174 | } |
| 1175 | |
| 1176 | static int |
| 1177 | process_event(struct event_format *event, const char *filter_str, |
| 1178 | struct filter_arg **parg, char **error_str) |
| 1179 | { |
| 1180 | int ret; |
| 1181 | |
| 1182 | pevent_buffer_init(filter_str, strlen(filter_str)); |
| 1183 | |
| 1184 | ret = process_filter(event, parg, error_str, 0); |
| 1185 | if (ret == 1) { |
| 1186 | show_error(error_str, |
| 1187 | "Unbalanced number of ')'"); |
| 1188 | return -1; |
| 1189 | } |
| 1190 | if (ret < 0) |
| 1191 | return ret; |
| 1192 | |
| 1193 | /* If parg is NULL, then make it into FALSE */ |
| 1194 | if (!*parg) { |
| 1195 | *parg = allocate_arg(); |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 1196 | if (*parg == NULL) { |
| 1197 | show_error(error_str, "failed to allocate filter arg"); |
| 1198 | return -1; |
| 1199 | } |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1200 | (*parg)->type = FILTER_ARG_BOOLEAN; |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 1201 | (*parg)->boolean.value = FILTER_FALSE; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1202 | } |
| 1203 | |
| 1204 | return 0; |
| 1205 | } |
| 1206 | |
| 1207 | static int filter_event(struct event_filter *filter, |
| 1208 | struct event_format *event, |
| 1209 | const char *filter_str, char **error_str) |
| 1210 | { |
| 1211 | struct filter_type *filter_type; |
| 1212 | struct filter_arg *arg; |
| 1213 | int ret; |
| 1214 | |
| 1215 | if (filter_str) { |
| 1216 | ret = process_event(event, filter_str, &arg, error_str); |
| 1217 | if (ret < 0) |
| 1218 | return ret; |
| 1219 | |
| 1220 | } else { |
| 1221 | /* just add a TRUE arg */ |
| 1222 | arg = allocate_arg(); |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 1223 | if (arg == NULL) { |
| 1224 | show_error(error_str, "failed to allocate filter arg"); |
| 1225 | return -1; |
| 1226 | } |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1227 | arg->type = FILTER_ARG_BOOLEAN; |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 1228 | arg->boolean.value = FILTER_TRUE; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1229 | } |
| 1230 | |
| 1231 | filter_type = add_filter_type(filter, event->id); |
Namhyung Kim | ef3072c | 2013-12-12 16:36:05 +0900 | [diff] [blame] | 1232 | if (filter_type == NULL) { |
| 1233 | show_error(error_str, "failed to add a new filter: %s", |
| 1234 | filter_str ? filter_str : "true"); |
| 1235 | return -1; |
| 1236 | } |
| 1237 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1238 | if (filter_type->filter) |
| 1239 | free_arg(filter_type->filter); |
| 1240 | filter_type->filter = arg; |
| 1241 | |
| 1242 | return 0; |
| 1243 | } |
| 1244 | |
| 1245 | /** |
| 1246 | * pevent_filter_add_filter_str - add a new filter |
| 1247 | * @filter: the event filter to add to |
| 1248 | * @filter_str: the filter string that contains the filter |
| 1249 | * @error_str: string containing reason for failed filter |
| 1250 | * |
| 1251 | * Returns 0 if the filter was successfully added |
| 1252 | * -1 if there was an error. |
| 1253 | * |
| 1254 | * On error, if @error_str points to a string pointer, |
| 1255 | * it is set to the reason that the filter failed. |
| 1256 | * This string must be freed with "free". |
| 1257 | */ |
| 1258 | int pevent_filter_add_filter_str(struct event_filter *filter, |
| 1259 | const char *filter_str, |
| 1260 | char **error_str) |
| 1261 | { |
| 1262 | struct pevent *pevent = filter->pevent; |
| 1263 | struct event_list *event; |
| 1264 | struct event_list *events = NULL; |
| 1265 | const char *filter_start; |
| 1266 | const char *next_event; |
| 1267 | char *this_event; |
| 1268 | char *event_name = NULL; |
| 1269 | char *sys_name = NULL; |
| 1270 | char *sp; |
| 1271 | int rtn = 0; |
| 1272 | int len; |
| 1273 | int ret; |
| 1274 | |
| 1275 | /* clear buffer to reset show error */ |
| 1276 | pevent_buffer_init("", 0); |
| 1277 | |
| 1278 | if (error_str) |
| 1279 | *error_str = NULL; |
| 1280 | |
| 1281 | filter_start = strchr(filter_str, ':'); |
| 1282 | if (filter_start) |
| 1283 | len = filter_start - filter_str; |
| 1284 | else |
| 1285 | len = strlen(filter_str); |
| 1286 | |
| 1287 | |
| 1288 | do { |
| 1289 | next_event = strchr(filter_str, ','); |
| 1290 | if (next_event && |
| 1291 | (!filter_start || next_event < filter_start)) |
| 1292 | len = next_event - filter_str; |
| 1293 | else if (filter_start) |
| 1294 | len = filter_start - filter_str; |
| 1295 | else |
| 1296 | len = strlen(filter_str); |
| 1297 | |
Namhyung Kim | 28942c8 | 2013-12-09 14:34:08 +0900 | [diff] [blame] | 1298 | this_event = malloc(len + 1); |
| 1299 | if (this_event == NULL) { |
| 1300 | show_error(error_str, "Memory allocation failure"); |
| 1301 | /* This can only happen when events is NULL, but still */ |
| 1302 | free_events(events); |
| 1303 | return -1; |
| 1304 | } |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1305 | memcpy(this_event, filter_str, len); |
| 1306 | this_event[len] = 0; |
| 1307 | |
| 1308 | if (next_event) |
| 1309 | next_event++; |
| 1310 | |
| 1311 | filter_str = next_event; |
| 1312 | |
| 1313 | sys_name = strtok_r(this_event, "/", &sp); |
| 1314 | event_name = strtok_r(NULL, "/", &sp); |
| 1315 | |
| 1316 | if (!sys_name) { |
| 1317 | show_error(error_str, "No filter found"); |
| 1318 | /* This can only happen when events is NULL, but still */ |
| 1319 | free_events(events); |
| 1320 | free(this_event); |
| 1321 | return -1; |
| 1322 | } |
| 1323 | |
| 1324 | /* Find this event */ |
| 1325 | ret = find_event(pevent, &events, strim(sys_name), strim(event_name)); |
| 1326 | if (ret < 0) { |
Namhyung Kim | 605b8fd | 2013-12-12 16:36:08 +0900 | [diff] [blame] | 1327 | if (ret == PEVENT_ERRNO__MEM_ALLOC_FAILED) |
| 1328 | show_error(error_str, |
| 1329 | "Memory allocation failure"); |
| 1330 | else if (event_name) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1331 | show_error(error_str, |
| 1332 | "No event found under '%s.%s'", |
| 1333 | sys_name, event_name); |
| 1334 | else |
| 1335 | show_error(error_str, |
| 1336 | "No event found under '%s'", |
| 1337 | sys_name); |
| 1338 | free_events(events); |
| 1339 | free(this_event); |
| 1340 | return -1; |
| 1341 | } |
| 1342 | free(this_event); |
| 1343 | } while (filter_str); |
| 1344 | |
| 1345 | /* Skip the ':' */ |
| 1346 | if (filter_start) |
| 1347 | filter_start++; |
| 1348 | |
| 1349 | /* filter starts here */ |
| 1350 | for (event = events; event; event = event->next) { |
| 1351 | ret = filter_event(filter, event->event, filter_start, |
| 1352 | error_str); |
| 1353 | /* Failures are returned if a parse error happened */ |
| 1354 | if (ret < 0) |
| 1355 | rtn = ret; |
| 1356 | |
| 1357 | if (ret >= 0 && pevent->test_filters) { |
| 1358 | char *test; |
| 1359 | test = pevent_filter_make_string(filter, event->event->id); |
| 1360 | printf(" '%s: %s'\n", event->event->name, test); |
| 1361 | free(test); |
| 1362 | } |
| 1363 | } |
| 1364 | |
| 1365 | free_events(events); |
| 1366 | |
| 1367 | if (rtn >= 0 && pevent->test_filters) |
| 1368 | exit(0); |
| 1369 | |
| 1370 | return rtn; |
| 1371 | } |
| 1372 | |
| 1373 | static void free_filter_type(struct filter_type *filter_type) |
| 1374 | { |
| 1375 | free_arg(filter_type->filter); |
| 1376 | } |
| 1377 | |
| 1378 | /** |
| 1379 | * pevent_filter_remove_event - remove a filter for an event |
| 1380 | * @filter: the event filter to remove from |
| 1381 | * @event_id: the event to remove a filter for |
| 1382 | * |
| 1383 | * Removes the filter saved for an event defined by @event_id |
| 1384 | * from the @filter. |
| 1385 | * |
| 1386 | * Returns 1: if an event was removed |
| 1387 | * 0: if the event was not found |
| 1388 | */ |
| 1389 | int pevent_filter_remove_event(struct event_filter *filter, |
| 1390 | int event_id) |
| 1391 | { |
| 1392 | struct filter_type *filter_type; |
| 1393 | unsigned long len; |
| 1394 | |
| 1395 | if (!filter->filters) |
| 1396 | return 0; |
| 1397 | |
| 1398 | filter_type = find_filter_type(filter, event_id); |
| 1399 | |
| 1400 | if (!filter_type) |
| 1401 | return 0; |
| 1402 | |
| 1403 | free_filter_type(filter_type); |
| 1404 | |
| 1405 | /* The filter_type points into the event_filters array */ |
| 1406 | len = (unsigned long)(filter->event_filters + filter->filters) - |
| 1407 | (unsigned long)(filter_type + 1); |
| 1408 | |
| 1409 | memmove(filter_type, filter_type + 1, len); |
| 1410 | filter->filters--; |
| 1411 | |
| 1412 | memset(&filter->event_filters[filter->filters], 0, |
| 1413 | sizeof(*filter_type)); |
| 1414 | |
| 1415 | return 1; |
| 1416 | } |
| 1417 | |
| 1418 | /** |
| 1419 | * pevent_filter_reset - clear all filters in a filter |
| 1420 | * @filter: the event filter to reset |
| 1421 | * |
| 1422 | * Removes all filters from a filter and resets it. |
| 1423 | */ |
| 1424 | void pevent_filter_reset(struct event_filter *filter) |
| 1425 | { |
| 1426 | int i; |
| 1427 | |
| 1428 | for (i = 0; i < filter->filters; i++) |
| 1429 | free_filter_type(&filter->event_filters[i]); |
| 1430 | |
| 1431 | free(filter->event_filters); |
| 1432 | filter->filters = 0; |
| 1433 | filter->event_filters = NULL; |
| 1434 | } |
| 1435 | |
| 1436 | void pevent_filter_free(struct event_filter *filter) |
| 1437 | { |
| 1438 | pevent_unref(filter->pevent); |
| 1439 | |
| 1440 | pevent_filter_reset(filter); |
| 1441 | |
| 1442 | free(filter); |
| 1443 | } |
| 1444 | |
| 1445 | static char *arg_to_str(struct event_filter *filter, struct filter_arg *arg); |
| 1446 | |
| 1447 | static int copy_filter_type(struct event_filter *filter, |
| 1448 | struct event_filter *source, |
| 1449 | struct filter_type *filter_type) |
| 1450 | { |
| 1451 | struct filter_arg *arg; |
| 1452 | struct event_format *event; |
| 1453 | const char *sys; |
| 1454 | const char *name; |
| 1455 | char *str; |
| 1456 | |
| 1457 | /* Can't assume that the pevent's are the same */ |
| 1458 | sys = filter_type->event->system; |
| 1459 | name = filter_type->event->name; |
| 1460 | event = pevent_find_event_by_name(filter->pevent, sys, name); |
| 1461 | if (!event) |
| 1462 | return -1; |
| 1463 | |
| 1464 | str = arg_to_str(source, filter_type->filter); |
| 1465 | if (!str) |
| 1466 | return -1; |
| 1467 | |
| 1468 | if (strcmp(str, "TRUE") == 0 || strcmp(str, "FALSE") == 0) { |
| 1469 | /* Add trivial event */ |
| 1470 | arg = allocate_arg(); |
Namhyung Kim | 2e4eb10 | 2013-12-12 16:36:06 +0900 | [diff] [blame] | 1471 | if (arg == NULL) |
| 1472 | return -1; |
| 1473 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1474 | arg->type = FILTER_ARG_BOOLEAN; |
| 1475 | if (strcmp(str, "TRUE") == 0) |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 1476 | arg->boolean.value = 1; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1477 | else |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 1478 | arg->boolean.value = 0; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1479 | |
| 1480 | filter_type = add_filter_type(filter, event->id); |
Namhyung Kim | ef3072c | 2013-12-12 16:36:05 +0900 | [diff] [blame] | 1481 | if (filter_type == NULL) |
| 1482 | return -1; |
| 1483 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1484 | filter_type->filter = arg; |
| 1485 | |
| 1486 | free(str); |
| 1487 | return 0; |
| 1488 | } |
| 1489 | |
| 1490 | filter_event(filter, event, str, NULL); |
| 1491 | free(str); |
| 1492 | |
| 1493 | return 0; |
| 1494 | } |
| 1495 | |
| 1496 | /** |
| 1497 | * pevent_filter_copy - copy a filter using another filter |
| 1498 | * @dest - the filter to copy to |
| 1499 | * @source - the filter to copy from |
| 1500 | * |
| 1501 | * Returns 0 on success and -1 if not all filters were copied |
| 1502 | */ |
| 1503 | int pevent_filter_copy(struct event_filter *dest, struct event_filter *source) |
| 1504 | { |
| 1505 | int ret = 0; |
| 1506 | int i; |
| 1507 | |
| 1508 | pevent_filter_reset(dest); |
| 1509 | |
| 1510 | for (i = 0; i < source->filters; i++) { |
| 1511 | if (copy_filter_type(dest, source, &source->event_filters[i])) |
| 1512 | ret = -1; |
| 1513 | } |
| 1514 | return ret; |
| 1515 | } |
| 1516 | |
| 1517 | |
| 1518 | /** |
| 1519 | * pevent_update_trivial - update the trivial filters with the given filter |
| 1520 | * @dest - the filter to update |
| 1521 | * @source - the filter as the source of the update |
| 1522 | * @type - the type of trivial filter to update. |
| 1523 | * |
| 1524 | * Scan dest for trivial events matching @type to replace with the source. |
| 1525 | * |
| 1526 | * Returns 0 on success and -1 if there was a problem updating, but |
| 1527 | * events may have still been updated on error. |
| 1528 | */ |
| 1529 | int pevent_update_trivial(struct event_filter *dest, struct event_filter *source, |
| 1530 | enum filter_trivial_type type) |
| 1531 | { |
| 1532 | struct pevent *src_pevent; |
| 1533 | struct pevent *dest_pevent; |
| 1534 | struct event_format *event; |
| 1535 | struct filter_type *filter_type; |
| 1536 | struct filter_arg *arg; |
| 1537 | char *str; |
| 1538 | int i; |
| 1539 | |
| 1540 | src_pevent = source->pevent; |
| 1541 | dest_pevent = dest->pevent; |
| 1542 | |
| 1543 | /* Do nothing if either of the filters has nothing to filter */ |
| 1544 | if (!dest->filters || !source->filters) |
| 1545 | return 0; |
| 1546 | |
| 1547 | for (i = 0; i < dest->filters; i++) { |
| 1548 | filter_type = &dest->event_filters[i]; |
| 1549 | arg = filter_type->filter; |
| 1550 | if (arg->type != FILTER_ARG_BOOLEAN) |
| 1551 | continue; |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 1552 | if ((arg->boolean.value && type == FILTER_TRIVIAL_FALSE) || |
| 1553 | (!arg->boolean.value && type == FILTER_TRIVIAL_TRUE)) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1554 | continue; |
| 1555 | |
| 1556 | event = filter_type->event; |
| 1557 | |
| 1558 | if (src_pevent != dest_pevent) { |
| 1559 | /* do a look up */ |
| 1560 | event = pevent_find_event_by_name(src_pevent, |
| 1561 | event->system, |
| 1562 | event->name); |
| 1563 | if (!event) |
| 1564 | return -1; |
| 1565 | } |
| 1566 | |
| 1567 | str = pevent_filter_make_string(source, event->id); |
| 1568 | if (!str) |
| 1569 | continue; |
| 1570 | |
| 1571 | /* Don't bother if the filter is trivial too */ |
| 1572 | if (strcmp(str, "TRUE") != 0 && strcmp(str, "FALSE") != 0) |
| 1573 | filter_event(dest, event, str, NULL); |
| 1574 | free(str); |
| 1575 | } |
| 1576 | return 0; |
| 1577 | } |
| 1578 | |
| 1579 | /** |
| 1580 | * pevent_filter_clear_trivial - clear TRUE and FALSE filters |
| 1581 | * @filter: the filter to remove trivial filters from |
| 1582 | * @type: remove only true, false, or both |
| 1583 | * |
| 1584 | * Removes filters that only contain a TRUE or FALES boolean arg. |
Namhyung Kim | 7ef2e81 | 2013-12-09 14:34:09 +0900 | [diff] [blame] | 1585 | * |
| 1586 | * Returns 0 on success and -1 if there was a problem. |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1587 | */ |
Namhyung Kim | 7ef2e81 | 2013-12-09 14:34:09 +0900 | [diff] [blame] | 1588 | int pevent_filter_clear_trivial(struct event_filter *filter, |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1589 | enum filter_trivial_type type) |
| 1590 | { |
| 1591 | struct filter_type *filter_type; |
| 1592 | int count = 0; |
Namhyung Kim | f6ced60 | 2012-04-24 10:29:44 +0900 | [diff] [blame] | 1593 | int *ids = NULL; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1594 | int i; |
| 1595 | |
| 1596 | if (!filter->filters) |
Namhyung Kim | 7ef2e81 | 2013-12-09 14:34:09 +0900 | [diff] [blame] | 1597 | return 0; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1598 | |
| 1599 | /* |
| 1600 | * Two steps, first get all ids with trivial filters. |
| 1601 | * then remove those ids. |
| 1602 | */ |
| 1603 | for (i = 0; i < filter->filters; i++) { |
Namhyung Kim | 7ef2e81 | 2013-12-09 14:34:09 +0900 | [diff] [blame] | 1604 | int *new_ids; |
| 1605 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1606 | filter_type = &filter->event_filters[i]; |
| 1607 | if (filter_type->filter->type != FILTER_ARG_BOOLEAN) |
| 1608 | continue; |
| 1609 | switch (type) { |
| 1610 | case FILTER_TRIVIAL_FALSE: |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 1611 | if (filter_type->filter->boolean.value) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1612 | continue; |
| 1613 | case FILTER_TRIVIAL_TRUE: |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 1614 | if (!filter_type->filter->boolean.value) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1615 | continue; |
| 1616 | default: |
| 1617 | break; |
| 1618 | } |
Namhyung Kim | f6ced60 | 2012-04-24 10:29:44 +0900 | [diff] [blame] | 1619 | |
Namhyung Kim | 7ef2e81 | 2013-12-09 14:34:09 +0900 | [diff] [blame] | 1620 | new_ids = realloc(ids, sizeof(*ids) * (count + 1)); |
| 1621 | if (!new_ids) { |
| 1622 | free(ids); |
| 1623 | return -1; |
| 1624 | } |
| 1625 | |
| 1626 | ids = new_ids; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1627 | ids[count++] = filter_type->event_id; |
| 1628 | } |
| 1629 | |
| 1630 | if (!count) |
Namhyung Kim | 7ef2e81 | 2013-12-09 14:34:09 +0900 | [diff] [blame] | 1631 | return 0; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1632 | |
| 1633 | for (i = 0; i < count; i++) |
| 1634 | pevent_filter_remove_event(filter, ids[i]); |
| 1635 | |
| 1636 | free(ids); |
Namhyung Kim | 7ef2e81 | 2013-12-09 14:34:09 +0900 | [diff] [blame] | 1637 | return 0; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1638 | } |
| 1639 | |
| 1640 | /** |
| 1641 | * pevent_filter_event_has_trivial - return true event contains trivial filter |
| 1642 | * @filter: the filter with the information |
| 1643 | * @event_id: the id of the event to test |
| 1644 | * @type: trivial type to test for (TRUE, FALSE, EITHER) |
| 1645 | * |
| 1646 | * Returns 1 if the event contains a matching trivial type |
| 1647 | * otherwise 0. |
| 1648 | */ |
| 1649 | int pevent_filter_event_has_trivial(struct event_filter *filter, |
| 1650 | int event_id, |
| 1651 | enum filter_trivial_type type) |
| 1652 | { |
| 1653 | struct filter_type *filter_type; |
| 1654 | |
| 1655 | if (!filter->filters) |
| 1656 | return 0; |
| 1657 | |
| 1658 | filter_type = find_filter_type(filter, event_id); |
| 1659 | |
| 1660 | if (!filter_type) |
| 1661 | return 0; |
| 1662 | |
| 1663 | if (filter_type->filter->type != FILTER_ARG_BOOLEAN) |
| 1664 | return 0; |
| 1665 | |
| 1666 | switch (type) { |
| 1667 | case FILTER_TRIVIAL_FALSE: |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 1668 | return !filter_type->filter->boolean.value; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1669 | |
| 1670 | case FILTER_TRIVIAL_TRUE: |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 1671 | return filter_type->filter->boolean.value; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1672 | default: |
| 1673 | return 1; |
| 1674 | } |
| 1675 | } |
| 1676 | |
| 1677 | static int test_filter(struct event_format *event, |
Steven Rostedt | 1c69818 | 2012-04-06 00:48:06 +0200 | [diff] [blame] | 1678 | struct filter_arg *arg, struct pevent_record *record); |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1679 | |
| 1680 | static const char * |
Steven Rostedt | 1c69818 | 2012-04-06 00:48:06 +0200 | [diff] [blame] | 1681 | get_comm(struct event_format *event, struct pevent_record *record) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1682 | { |
| 1683 | const char *comm; |
| 1684 | int pid; |
| 1685 | |
| 1686 | pid = pevent_data_pid(event->pevent, record); |
| 1687 | comm = pevent_data_comm_from_pid(event->pevent, pid); |
| 1688 | return comm; |
| 1689 | } |
| 1690 | |
| 1691 | static unsigned long long |
| 1692 | get_value(struct event_format *event, |
Steven Rostedt | 1c69818 | 2012-04-06 00:48:06 +0200 | [diff] [blame] | 1693 | struct format_field *field, struct pevent_record *record) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1694 | { |
| 1695 | unsigned long long val; |
| 1696 | |
| 1697 | /* Handle our dummy "comm" field */ |
| 1698 | if (field == &comm) { |
| 1699 | const char *name; |
| 1700 | |
| 1701 | name = get_comm(event, record); |
Namhyung Kim | 42c59cd | 2012-05-26 12:41:31 +0900 | [diff] [blame] | 1702 | return (unsigned long)name; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1703 | } |
| 1704 | |
| 1705 | pevent_read_number_field(field, record->data, &val); |
| 1706 | |
| 1707 | if (!(field->flags & FIELD_IS_SIGNED)) |
| 1708 | return val; |
| 1709 | |
| 1710 | switch (field->size) { |
| 1711 | case 1: |
| 1712 | return (char)val; |
| 1713 | case 2: |
| 1714 | return (short)val; |
| 1715 | case 4: |
| 1716 | return (int)val; |
| 1717 | case 8: |
| 1718 | return (long long)val; |
| 1719 | } |
| 1720 | return val; |
| 1721 | } |
| 1722 | |
| 1723 | static unsigned long long |
Steven Rostedt | 1c69818 | 2012-04-06 00:48:06 +0200 | [diff] [blame] | 1724 | get_arg_value(struct event_format *event, struct filter_arg *arg, struct pevent_record *record); |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1725 | |
| 1726 | static unsigned long long |
Steven Rostedt | 1c69818 | 2012-04-06 00:48:06 +0200 | [diff] [blame] | 1727 | get_exp_value(struct event_format *event, struct filter_arg *arg, struct pevent_record *record) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1728 | { |
| 1729 | unsigned long long lval, rval; |
| 1730 | |
| 1731 | lval = get_arg_value(event, arg->exp.left, record); |
| 1732 | rval = get_arg_value(event, arg->exp.right, record); |
| 1733 | |
| 1734 | switch (arg->exp.type) { |
| 1735 | case FILTER_EXP_ADD: |
| 1736 | return lval + rval; |
| 1737 | |
| 1738 | case FILTER_EXP_SUB: |
| 1739 | return lval - rval; |
| 1740 | |
| 1741 | case FILTER_EXP_MUL: |
| 1742 | return lval * rval; |
| 1743 | |
| 1744 | case FILTER_EXP_DIV: |
| 1745 | return lval / rval; |
| 1746 | |
| 1747 | case FILTER_EXP_MOD: |
| 1748 | return lval % rval; |
| 1749 | |
| 1750 | case FILTER_EXP_RSHIFT: |
| 1751 | return lval >> rval; |
| 1752 | |
| 1753 | case FILTER_EXP_LSHIFT: |
| 1754 | return lval << rval; |
| 1755 | |
| 1756 | case FILTER_EXP_AND: |
| 1757 | return lval & rval; |
| 1758 | |
| 1759 | case FILTER_EXP_OR: |
| 1760 | return lval | rval; |
| 1761 | |
| 1762 | case FILTER_EXP_XOR: |
| 1763 | return lval ^ rval; |
| 1764 | |
| 1765 | case FILTER_EXP_NOT: |
| 1766 | default: |
| 1767 | die("error in exp"); |
| 1768 | } |
| 1769 | return 0; |
| 1770 | } |
| 1771 | |
| 1772 | static unsigned long long |
Steven Rostedt | 1c69818 | 2012-04-06 00:48:06 +0200 | [diff] [blame] | 1773 | get_arg_value(struct event_format *event, struct filter_arg *arg, struct pevent_record *record) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1774 | { |
| 1775 | switch (arg->type) { |
| 1776 | case FILTER_ARG_FIELD: |
| 1777 | return get_value(event, arg->field.field, record); |
| 1778 | |
| 1779 | case FILTER_ARG_VALUE: |
| 1780 | if (arg->value.type != FILTER_NUMBER) |
| 1781 | die("must have number field!"); |
| 1782 | return arg->value.val; |
| 1783 | |
| 1784 | case FILTER_ARG_EXP: |
| 1785 | return get_exp_value(event, arg, record); |
| 1786 | |
| 1787 | default: |
| 1788 | die("oops in filter"); |
| 1789 | } |
| 1790 | return 0; |
| 1791 | } |
| 1792 | |
| 1793 | static int test_num(struct event_format *event, |
Steven Rostedt | 1c69818 | 2012-04-06 00:48:06 +0200 | [diff] [blame] | 1794 | struct filter_arg *arg, struct pevent_record *record) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1795 | { |
| 1796 | unsigned long long lval, rval; |
| 1797 | |
| 1798 | lval = get_arg_value(event, arg->num.left, record); |
| 1799 | rval = get_arg_value(event, arg->num.right, record); |
| 1800 | |
| 1801 | switch (arg->num.type) { |
| 1802 | case FILTER_CMP_EQ: |
| 1803 | return lval == rval; |
| 1804 | |
| 1805 | case FILTER_CMP_NE: |
| 1806 | return lval != rval; |
| 1807 | |
| 1808 | case FILTER_CMP_GT: |
| 1809 | return lval > rval; |
| 1810 | |
| 1811 | case FILTER_CMP_LT: |
| 1812 | return lval < rval; |
| 1813 | |
| 1814 | case FILTER_CMP_GE: |
| 1815 | return lval >= rval; |
| 1816 | |
| 1817 | case FILTER_CMP_LE: |
| 1818 | return lval <= rval; |
| 1819 | |
| 1820 | default: |
| 1821 | /* ?? */ |
| 1822 | return 0; |
| 1823 | } |
| 1824 | } |
| 1825 | |
Steven Rostedt | 1c69818 | 2012-04-06 00:48:06 +0200 | [diff] [blame] | 1826 | static const char *get_field_str(struct filter_arg *arg, struct pevent_record *record) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1827 | { |
Steven Rostedt | e84c282 | 2012-05-22 14:45:21 +0900 | [diff] [blame] | 1828 | struct event_format *event; |
| 1829 | struct pevent *pevent; |
| 1830 | unsigned long long addr; |
| 1831 | const char *val = NULL; |
| 1832 | char hex[64]; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1833 | |
Steven Rostedt | e84c282 | 2012-05-22 14:45:21 +0900 | [diff] [blame] | 1834 | /* If the field is not a string convert it */ |
| 1835 | if (arg->str.field->flags & FIELD_IS_STRING) { |
| 1836 | val = record->data + arg->str.field->offset; |
| 1837 | |
| 1838 | /* |
| 1839 | * We need to copy the data since we can't be sure the field |
| 1840 | * is null terminated. |
| 1841 | */ |
| 1842 | if (*(val + arg->str.field->size - 1)) { |
| 1843 | /* copy it */ |
| 1844 | memcpy(arg->str.buffer, val, arg->str.field->size); |
| 1845 | /* the buffer is already NULL terminated */ |
| 1846 | val = arg->str.buffer; |
| 1847 | } |
| 1848 | |
| 1849 | } else { |
| 1850 | event = arg->str.field->event; |
| 1851 | pevent = event->pevent; |
| 1852 | addr = get_value(event, arg->str.field, record); |
| 1853 | |
| 1854 | if (arg->str.field->flags & (FIELD_IS_POINTER | FIELD_IS_LONG)) |
| 1855 | /* convert to a kernel symbol */ |
| 1856 | val = pevent_find_function(pevent, addr); |
| 1857 | |
| 1858 | if (val == NULL) { |
| 1859 | /* just use the hex of the string name */ |
| 1860 | snprintf(hex, 64, "0x%llx", addr); |
| 1861 | val = hex; |
| 1862 | } |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1863 | } |
Steven Rostedt | e84c282 | 2012-05-22 14:45:21 +0900 | [diff] [blame] | 1864 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1865 | return val; |
| 1866 | } |
| 1867 | |
| 1868 | static int test_str(struct event_format *event, |
Steven Rostedt | 1c69818 | 2012-04-06 00:48:06 +0200 | [diff] [blame] | 1869 | struct filter_arg *arg, struct pevent_record *record) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1870 | { |
| 1871 | const char *val; |
| 1872 | |
| 1873 | if (arg->str.field == &comm) |
| 1874 | val = get_comm(event, record); |
| 1875 | else |
| 1876 | val = get_field_str(arg, record); |
| 1877 | |
| 1878 | switch (arg->str.type) { |
| 1879 | case FILTER_CMP_MATCH: |
| 1880 | return strcmp(val, arg->str.val) == 0; |
| 1881 | |
| 1882 | case FILTER_CMP_NOT_MATCH: |
| 1883 | return strcmp(val, arg->str.val) != 0; |
| 1884 | |
| 1885 | case FILTER_CMP_REGEX: |
| 1886 | /* Returns zero on match */ |
| 1887 | return !regexec(&arg->str.reg, val, 0, NULL, 0); |
| 1888 | |
| 1889 | case FILTER_CMP_NOT_REGEX: |
| 1890 | return regexec(&arg->str.reg, val, 0, NULL, 0); |
| 1891 | |
| 1892 | default: |
| 1893 | /* ?? */ |
| 1894 | return 0; |
| 1895 | } |
| 1896 | } |
| 1897 | |
| 1898 | static int test_op(struct event_format *event, |
Steven Rostedt | 1c69818 | 2012-04-06 00:48:06 +0200 | [diff] [blame] | 1899 | struct filter_arg *arg, struct pevent_record *record) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1900 | { |
| 1901 | switch (arg->op.type) { |
| 1902 | case FILTER_OP_AND: |
| 1903 | return test_filter(event, arg->op.left, record) && |
| 1904 | test_filter(event, arg->op.right, record); |
| 1905 | |
| 1906 | case FILTER_OP_OR: |
| 1907 | return test_filter(event, arg->op.left, record) || |
| 1908 | test_filter(event, arg->op.right, record); |
| 1909 | |
| 1910 | case FILTER_OP_NOT: |
| 1911 | return !test_filter(event, arg->op.right, record); |
| 1912 | |
| 1913 | default: |
| 1914 | /* ?? */ |
| 1915 | return 0; |
| 1916 | } |
| 1917 | } |
| 1918 | |
| 1919 | static int test_filter(struct event_format *event, |
Steven Rostedt | 1c69818 | 2012-04-06 00:48:06 +0200 | [diff] [blame] | 1920 | struct filter_arg *arg, struct pevent_record *record) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1921 | { |
| 1922 | switch (arg->type) { |
| 1923 | case FILTER_ARG_BOOLEAN: |
| 1924 | /* easy case */ |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 1925 | return arg->boolean.value; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1926 | |
| 1927 | case FILTER_ARG_OP: |
| 1928 | return test_op(event, arg, record); |
| 1929 | |
| 1930 | case FILTER_ARG_NUM: |
| 1931 | return test_num(event, arg, record); |
| 1932 | |
| 1933 | case FILTER_ARG_STR: |
| 1934 | return test_str(event, arg, record); |
| 1935 | |
| 1936 | case FILTER_ARG_EXP: |
| 1937 | case FILTER_ARG_VALUE: |
| 1938 | case FILTER_ARG_FIELD: |
| 1939 | /* |
| 1940 | * Expressions, fields and values evaluate |
| 1941 | * to true if they return non zero |
| 1942 | */ |
| 1943 | return !!get_arg_value(event, arg, record); |
| 1944 | |
| 1945 | default: |
| 1946 | die("oops!"); |
| 1947 | /* ?? */ |
| 1948 | return 0; |
| 1949 | } |
| 1950 | } |
| 1951 | |
| 1952 | /** |
| 1953 | * pevent_event_filtered - return true if event has filter |
| 1954 | * @filter: filter struct with filter information |
| 1955 | * @event_id: event id to test if filter exists |
| 1956 | * |
| 1957 | * Returns 1 if filter found for @event_id |
| 1958 | * otherwise 0; |
| 1959 | */ |
| 1960 | int pevent_event_filtered(struct event_filter *filter, |
| 1961 | int event_id) |
| 1962 | { |
| 1963 | struct filter_type *filter_type; |
| 1964 | |
| 1965 | if (!filter->filters) |
| 1966 | return 0; |
| 1967 | |
| 1968 | filter_type = find_filter_type(filter, event_id); |
| 1969 | |
| 1970 | return filter_type ? 1 : 0; |
| 1971 | } |
| 1972 | |
| 1973 | /** |
| 1974 | * pevent_filter_match - test if a record matches a filter |
| 1975 | * @filter: filter struct with filter information |
| 1976 | * @record: the record to test against the filter |
| 1977 | * |
| 1978 | * Returns: |
| 1979 | * 1 - filter found for event and @record matches |
| 1980 | * 0 - filter found for event and @record does not match |
| 1981 | * -1 - no filter found for @record's event |
| 1982 | * -2 - if no filters exist |
| 1983 | */ |
| 1984 | int pevent_filter_match(struct event_filter *filter, |
Steven Rostedt | 1c69818 | 2012-04-06 00:48:06 +0200 | [diff] [blame] | 1985 | struct pevent_record *record) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 1986 | { |
| 1987 | struct pevent *pevent = filter->pevent; |
| 1988 | struct filter_type *filter_type; |
| 1989 | int event_id; |
| 1990 | |
| 1991 | if (!filter->filters) |
| 1992 | return FILTER_NONE; |
| 1993 | |
| 1994 | event_id = pevent_data_type(pevent, record); |
| 1995 | |
| 1996 | filter_type = find_filter_type(filter, event_id); |
| 1997 | |
| 1998 | if (!filter_type) |
| 1999 | return FILTER_NOEXIST; |
| 2000 | |
| 2001 | return test_filter(filter_type->event, filter_type->filter, record) ? |
| 2002 | FILTER_MATCH : FILTER_MISS; |
| 2003 | } |
| 2004 | |
| 2005 | static char *op_to_str(struct event_filter *filter, struct filter_arg *arg) |
| 2006 | { |
| 2007 | char *str = NULL; |
| 2008 | char *left = NULL; |
| 2009 | char *right = NULL; |
| 2010 | char *op = NULL; |
| 2011 | int left_val = -1; |
| 2012 | int right_val = -1; |
| 2013 | int val; |
| 2014 | int len; |
| 2015 | |
| 2016 | switch (arg->op.type) { |
| 2017 | case FILTER_OP_AND: |
| 2018 | op = "&&"; |
| 2019 | /* fall through */ |
| 2020 | case FILTER_OP_OR: |
| 2021 | if (!op) |
| 2022 | op = "||"; |
| 2023 | |
| 2024 | left = arg_to_str(filter, arg->op.left); |
| 2025 | right = arg_to_str(filter, arg->op.right); |
| 2026 | if (!left || !right) |
| 2027 | break; |
| 2028 | |
| 2029 | /* Try to consolidate boolean values */ |
| 2030 | if (strcmp(left, "TRUE") == 0) |
| 2031 | left_val = 1; |
| 2032 | else if (strcmp(left, "FALSE") == 0) |
| 2033 | left_val = 0; |
| 2034 | |
| 2035 | if (strcmp(right, "TRUE") == 0) |
| 2036 | right_val = 1; |
| 2037 | else if (strcmp(right, "FALSE") == 0) |
| 2038 | right_val = 0; |
| 2039 | |
| 2040 | if (left_val >= 0) { |
| 2041 | if ((arg->op.type == FILTER_OP_AND && !left_val) || |
| 2042 | (arg->op.type == FILTER_OP_OR && left_val)) { |
| 2043 | /* Just return left value */ |
| 2044 | str = left; |
| 2045 | left = NULL; |
| 2046 | break; |
| 2047 | } |
| 2048 | if (right_val >= 0) { |
| 2049 | /* just evaluate this. */ |
| 2050 | val = 0; |
| 2051 | switch (arg->op.type) { |
| 2052 | case FILTER_OP_AND: |
| 2053 | val = left_val && right_val; |
| 2054 | break; |
| 2055 | case FILTER_OP_OR: |
| 2056 | val = left_val || right_val; |
| 2057 | break; |
| 2058 | default: |
| 2059 | break; |
| 2060 | } |
| 2061 | str = malloc_or_die(6); |
| 2062 | if (val) |
| 2063 | strcpy(str, "TRUE"); |
| 2064 | else |
| 2065 | strcpy(str, "FALSE"); |
| 2066 | break; |
| 2067 | } |
| 2068 | } |
| 2069 | if (right_val >= 0) { |
| 2070 | if ((arg->op.type == FILTER_OP_AND && !right_val) || |
| 2071 | (arg->op.type == FILTER_OP_OR && right_val)) { |
| 2072 | /* Just return right value */ |
| 2073 | str = right; |
| 2074 | right = NULL; |
| 2075 | break; |
| 2076 | } |
| 2077 | /* The right value is meaningless */ |
| 2078 | str = left; |
| 2079 | left = NULL; |
| 2080 | break; |
| 2081 | } |
| 2082 | |
| 2083 | len = strlen(left) + strlen(right) + strlen(op) + 10; |
| 2084 | str = malloc_or_die(len); |
| 2085 | snprintf(str, len, "(%s) %s (%s)", |
| 2086 | left, op, right); |
| 2087 | break; |
| 2088 | |
| 2089 | case FILTER_OP_NOT: |
| 2090 | op = "!"; |
| 2091 | right = arg_to_str(filter, arg->op.right); |
| 2092 | if (!right) |
| 2093 | break; |
| 2094 | |
| 2095 | /* See if we can consolidate */ |
| 2096 | if (strcmp(right, "TRUE") == 0) |
| 2097 | right_val = 1; |
| 2098 | else if (strcmp(right, "FALSE") == 0) |
| 2099 | right_val = 0; |
| 2100 | if (right_val >= 0) { |
| 2101 | /* just return the opposite */ |
| 2102 | str = malloc_or_die(6); |
| 2103 | if (right_val) |
| 2104 | strcpy(str, "FALSE"); |
| 2105 | else |
| 2106 | strcpy(str, "TRUE"); |
| 2107 | break; |
| 2108 | } |
| 2109 | len = strlen(right) + strlen(op) + 3; |
| 2110 | str = malloc_or_die(len); |
| 2111 | snprintf(str, len, "%s(%s)", op, right); |
| 2112 | break; |
| 2113 | |
| 2114 | default: |
| 2115 | /* ?? */ |
| 2116 | break; |
| 2117 | } |
| 2118 | free(left); |
| 2119 | free(right); |
| 2120 | return str; |
| 2121 | } |
| 2122 | |
| 2123 | static char *val_to_str(struct event_filter *filter, struct filter_arg *arg) |
| 2124 | { |
| 2125 | char *str; |
| 2126 | |
| 2127 | str = malloc_or_die(30); |
| 2128 | |
| 2129 | snprintf(str, 30, "%lld", arg->value.val); |
| 2130 | |
| 2131 | return str; |
| 2132 | } |
| 2133 | |
| 2134 | static char *field_to_str(struct event_filter *filter, struct filter_arg *arg) |
| 2135 | { |
| 2136 | return strdup(arg->field.field->name); |
| 2137 | } |
| 2138 | |
| 2139 | static char *exp_to_str(struct event_filter *filter, struct filter_arg *arg) |
| 2140 | { |
| 2141 | char *lstr; |
| 2142 | char *rstr; |
| 2143 | char *op; |
Namhyung Kim | 0fed483 | 2012-04-23 13:58:38 +0900 | [diff] [blame] | 2144 | char *str = NULL; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 2145 | int len; |
| 2146 | |
| 2147 | lstr = arg_to_str(filter, arg->exp.left); |
| 2148 | rstr = arg_to_str(filter, arg->exp.right); |
Namhyung Kim | 0fed483 | 2012-04-23 13:58:38 +0900 | [diff] [blame] | 2149 | if (!lstr || !rstr) |
| 2150 | goto out; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 2151 | |
| 2152 | switch (arg->exp.type) { |
| 2153 | case FILTER_EXP_ADD: |
| 2154 | op = "+"; |
| 2155 | break; |
| 2156 | case FILTER_EXP_SUB: |
| 2157 | op = "-"; |
| 2158 | break; |
| 2159 | case FILTER_EXP_MUL: |
| 2160 | op = "*"; |
| 2161 | break; |
| 2162 | case FILTER_EXP_DIV: |
| 2163 | op = "/"; |
| 2164 | break; |
| 2165 | case FILTER_EXP_MOD: |
| 2166 | op = "%"; |
| 2167 | break; |
| 2168 | case FILTER_EXP_RSHIFT: |
| 2169 | op = ">>"; |
| 2170 | break; |
| 2171 | case FILTER_EXP_LSHIFT: |
| 2172 | op = "<<"; |
| 2173 | break; |
| 2174 | case FILTER_EXP_AND: |
| 2175 | op = "&"; |
| 2176 | break; |
| 2177 | case FILTER_EXP_OR: |
| 2178 | op = "|"; |
| 2179 | break; |
| 2180 | case FILTER_EXP_XOR: |
| 2181 | op = "^"; |
| 2182 | break; |
| 2183 | default: |
| 2184 | die("oops in exp"); |
| 2185 | } |
| 2186 | |
| 2187 | len = strlen(op) + strlen(lstr) + strlen(rstr) + 4; |
| 2188 | str = malloc_or_die(len); |
| 2189 | snprintf(str, len, "%s %s %s", lstr, op, rstr); |
Namhyung Kim | 0fed483 | 2012-04-23 13:58:38 +0900 | [diff] [blame] | 2190 | out: |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 2191 | free(lstr); |
| 2192 | free(rstr); |
| 2193 | |
| 2194 | return str; |
| 2195 | } |
| 2196 | |
| 2197 | static char *num_to_str(struct event_filter *filter, struct filter_arg *arg) |
| 2198 | { |
| 2199 | char *lstr; |
| 2200 | char *rstr; |
| 2201 | char *str = NULL; |
| 2202 | char *op = NULL; |
| 2203 | int len; |
| 2204 | |
| 2205 | lstr = arg_to_str(filter, arg->num.left); |
| 2206 | rstr = arg_to_str(filter, arg->num.right); |
Namhyung Kim | 0fed483 | 2012-04-23 13:58:38 +0900 | [diff] [blame] | 2207 | if (!lstr || !rstr) |
| 2208 | goto out; |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 2209 | |
| 2210 | switch (arg->num.type) { |
| 2211 | case FILTER_CMP_EQ: |
| 2212 | op = "=="; |
| 2213 | /* fall through */ |
| 2214 | case FILTER_CMP_NE: |
| 2215 | if (!op) |
| 2216 | op = "!="; |
| 2217 | /* fall through */ |
| 2218 | case FILTER_CMP_GT: |
| 2219 | if (!op) |
| 2220 | op = ">"; |
| 2221 | /* fall through */ |
| 2222 | case FILTER_CMP_LT: |
| 2223 | if (!op) |
| 2224 | op = "<"; |
| 2225 | /* fall through */ |
| 2226 | case FILTER_CMP_GE: |
| 2227 | if (!op) |
| 2228 | op = ">="; |
| 2229 | /* fall through */ |
| 2230 | case FILTER_CMP_LE: |
| 2231 | if (!op) |
| 2232 | op = "<="; |
| 2233 | |
| 2234 | len = strlen(lstr) + strlen(op) + strlen(rstr) + 4; |
| 2235 | str = malloc_or_die(len); |
| 2236 | sprintf(str, "%s %s %s", lstr, op, rstr); |
| 2237 | |
| 2238 | break; |
| 2239 | |
| 2240 | default: |
| 2241 | /* ?? */ |
| 2242 | break; |
| 2243 | } |
| 2244 | |
Namhyung Kim | 0fed483 | 2012-04-23 13:58:38 +0900 | [diff] [blame] | 2245 | out: |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 2246 | free(lstr); |
| 2247 | free(rstr); |
| 2248 | return str; |
| 2249 | } |
| 2250 | |
| 2251 | static char *str_to_str(struct event_filter *filter, struct filter_arg *arg) |
| 2252 | { |
| 2253 | char *str = NULL; |
| 2254 | char *op = NULL; |
| 2255 | int len; |
| 2256 | |
| 2257 | switch (arg->str.type) { |
| 2258 | case FILTER_CMP_MATCH: |
| 2259 | op = "=="; |
| 2260 | /* fall through */ |
| 2261 | case FILTER_CMP_NOT_MATCH: |
| 2262 | if (!op) |
| 2263 | op = "!="; |
| 2264 | /* fall through */ |
| 2265 | case FILTER_CMP_REGEX: |
| 2266 | if (!op) |
| 2267 | op = "=~"; |
| 2268 | /* fall through */ |
| 2269 | case FILTER_CMP_NOT_REGEX: |
| 2270 | if (!op) |
| 2271 | op = "!~"; |
| 2272 | |
| 2273 | len = strlen(arg->str.field->name) + strlen(op) + |
| 2274 | strlen(arg->str.val) + 6; |
| 2275 | str = malloc_or_die(len); |
| 2276 | snprintf(str, len, "%s %s \"%s\"", |
| 2277 | arg->str.field->name, |
| 2278 | op, arg->str.val); |
| 2279 | break; |
| 2280 | |
| 2281 | default: |
| 2282 | /* ?? */ |
| 2283 | break; |
| 2284 | } |
| 2285 | return str; |
| 2286 | } |
| 2287 | |
| 2288 | static char *arg_to_str(struct event_filter *filter, struct filter_arg *arg) |
| 2289 | { |
| 2290 | char *str; |
| 2291 | |
| 2292 | switch (arg->type) { |
| 2293 | case FILTER_ARG_BOOLEAN: |
| 2294 | str = malloc_or_die(6); |
Steven Rostedt | 668fe01 | 2012-04-06 00:47:55 +0200 | [diff] [blame] | 2295 | if (arg->boolean.value) |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 2296 | strcpy(str, "TRUE"); |
| 2297 | else |
| 2298 | strcpy(str, "FALSE"); |
| 2299 | return str; |
| 2300 | |
| 2301 | case FILTER_ARG_OP: |
| 2302 | return op_to_str(filter, arg); |
| 2303 | |
| 2304 | case FILTER_ARG_NUM: |
| 2305 | return num_to_str(filter, arg); |
| 2306 | |
| 2307 | case FILTER_ARG_STR: |
| 2308 | return str_to_str(filter, arg); |
| 2309 | |
| 2310 | case FILTER_ARG_VALUE: |
| 2311 | return val_to_str(filter, arg); |
| 2312 | |
| 2313 | case FILTER_ARG_FIELD: |
| 2314 | return field_to_str(filter, arg); |
| 2315 | |
| 2316 | case FILTER_ARG_EXP: |
| 2317 | return exp_to_str(filter, arg); |
| 2318 | |
| 2319 | default: |
| 2320 | /* ?? */ |
| 2321 | return NULL; |
| 2322 | } |
| 2323 | |
| 2324 | } |
| 2325 | |
| 2326 | /** |
| 2327 | * pevent_filter_make_string - return a string showing the filter |
| 2328 | * @filter: filter struct with filter information |
| 2329 | * @event_id: the event id to return the filter string with |
| 2330 | * |
| 2331 | * Returns a string that displays the filter contents. |
| 2332 | * This string must be freed with free(str). |
| 2333 | * NULL is returned if no filter is found. |
| 2334 | */ |
| 2335 | char * |
| 2336 | pevent_filter_make_string(struct event_filter *filter, int event_id) |
| 2337 | { |
| 2338 | struct filter_type *filter_type; |
| 2339 | |
| 2340 | if (!filter->filters) |
| 2341 | return NULL; |
| 2342 | |
| 2343 | filter_type = find_filter_type(filter, event_id); |
| 2344 | |
| 2345 | if (!filter_type) |
| 2346 | return NULL; |
| 2347 | |
| 2348 | return arg_to_str(filter, filter_type->filter); |
| 2349 | } |
| 2350 | |
| 2351 | /** |
| 2352 | * pevent_filter_compare - compare two filters and return if they are the same |
| 2353 | * @filter1: Filter to compare with @filter2 |
| 2354 | * @filter2: Filter to compare with @filter1 |
| 2355 | * |
| 2356 | * Returns: |
| 2357 | * 1 if the two filters hold the same content. |
| 2358 | * 0 if they do not. |
| 2359 | */ |
| 2360 | int pevent_filter_compare(struct event_filter *filter1, struct event_filter *filter2) |
| 2361 | { |
| 2362 | struct filter_type *filter_type1; |
| 2363 | struct filter_type *filter_type2; |
| 2364 | char *str1, *str2; |
| 2365 | int result; |
| 2366 | int i; |
| 2367 | |
| 2368 | /* Do the easy checks first */ |
| 2369 | if (filter1->filters != filter2->filters) |
| 2370 | return 0; |
| 2371 | if (!filter1->filters && !filter2->filters) |
| 2372 | return 1; |
| 2373 | |
| 2374 | /* |
| 2375 | * Now take a look at each of the events to see if they have the same |
| 2376 | * filters to them. |
| 2377 | */ |
| 2378 | for (i = 0; i < filter1->filters; i++) { |
| 2379 | filter_type1 = &filter1->event_filters[i]; |
| 2380 | filter_type2 = find_filter_type(filter2, filter_type1->event_id); |
| 2381 | if (!filter_type2) |
| 2382 | break; |
| 2383 | if (filter_type1->filter->type != filter_type2->filter->type) |
| 2384 | break; |
| 2385 | switch (filter_type1->filter->type) { |
| 2386 | case FILTER_TRIVIAL_FALSE: |
| 2387 | case FILTER_TRIVIAL_TRUE: |
| 2388 | /* trivial types just need the type compared */ |
| 2389 | continue; |
| 2390 | default: |
| 2391 | break; |
| 2392 | } |
| 2393 | /* The best way to compare complex filters is with strings */ |
| 2394 | str1 = arg_to_str(filter1, filter_type1->filter); |
| 2395 | str2 = arg_to_str(filter2, filter_type2->filter); |
Namhyung Kim | 0fed483 | 2012-04-23 13:58:38 +0900 | [diff] [blame] | 2396 | if (str1 && str2) |
| 2397 | result = strcmp(str1, str2) != 0; |
| 2398 | else |
| 2399 | /* bail out if allocation fails */ |
| 2400 | result = 1; |
| 2401 | |
Steven Rostedt | f7d8235 | 2012-04-06 00:47:53 +0200 | [diff] [blame] | 2402 | free(str1); |
| 2403 | free(str2); |
| 2404 | if (result) |
| 2405 | break; |
| 2406 | } |
| 2407 | |
| 2408 | if (i < filter1->filters) |
| 2409 | return 0; |
| 2410 | return 1; |
| 2411 | } |
| 2412 | |