Commit | Line | Data |
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f7d82350 SR |
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 | |
7b9f6b40 | 16 | * License along with this program; if not, see <http://www.gnu.org/licenses> |
f7d82350 SR |
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 | ||
bf19b82e | 41 | static void show_error(char *error_buf, const char *fmt, ...) |
f7d82350 SR |
42 | { |
43 | unsigned long long index; | |
44 | const char *input; | |
f7d82350 SR |
45 | va_list ap; |
46 | int len; | |
47 | int i; | |
48 | ||
f7d82350 SR |
49 | input = pevent_get_input_buf(); |
50 | index = pevent_get_input_buf_ptr(); | |
51 | len = input ? strlen(input) : 0; | |
52 | ||
f7d82350 | 53 | if (len) { |
bf19b82e NK |
54 | strcpy(error_buf, input); |
55 | error_buf[len] = '\n'; | |
f7d82350 | 56 | for (i = 1; i < len && i < index; i++) |
bf19b82e NK |
57 | error_buf[len+i] = ' '; |
58 | error_buf[len + i] = '^'; | |
59 | error_buf[len + i + 1] = '\n'; | |
f7d82350 SR |
60 | len += i+2; |
61 | } | |
62 | ||
63 | va_start(ap, fmt); | |
bf19b82e | 64 | vsnprintf(error_buf + len, PEVENT_FILTER_ERROR_BUFSZ - len, fmt, ap); |
f7d82350 | 65 | va_end(ap); |
f7d82350 SR |
66 | } |
67 | ||
68 | static void free_token(char *token) | |
69 | { | |
70 | pevent_free_token(token); | |
71 | } | |
72 | ||
73 | static enum event_type read_token(char **tok) | |
74 | { | |
75 | enum event_type type; | |
76 | char *token = NULL; | |
77 | ||
78 | do { | |
79 | free_token(token); | |
80 | type = pevent_read_token(&token); | |
81 | } while (type == EVENT_NEWLINE || type == EVENT_SPACE); | |
82 | ||
83 | /* If token is = or ! check to see if the next char is ~ */ | |
84 | if (token && | |
85 | (strcmp(token, "=") == 0 || strcmp(token, "!") == 0) && | |
86 | pevent_peek_char() == '~') { | |
87 | /* append it */ | |
91dfa49b NK |
88 | *tok = malloc(3); |
89 | if (*tok == NULL) { | |
90 | free_token(token); | |
91 | return EVENT_ERROR; | |
92 | } | |
f7d82350 SR |
93 | sprintf(*tok, "%c%c", *token, '~'); |
94 | free_token(token); | |
95 | /* Now remove the '~' from the buffer */ | |
96 | pevent_read_token(&token); | |
97 | free_token(token); | |
98 | } else | |
99 | *tok = token; | |
100 | ||
101 | return type; | |
102 | } | |
103 | ||
104 | static int filter_cmp(const void *a, const void *b) | |
105 | { | |
106 | const struct filter_type *ea = a; | |
107 | const struct filter_type *eb = b; | |
108 | ||
109 | if (ea->event_id < eb->event_id) | |
110 | return -1; | |
111 | ||
112 | if (ea->event_id > eb->event_id) | |
113 | return 1; | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | static struct filter_type * | |
119 | find_filter_type(struct event_filter *filter, int id) | |
120 | { | |
121 | struct filter_type *filter_type; | |
122 | struct filter_type key; | |
123 | ||
124 | key.event_id = id; | |
125 | ||
126 | filter_type = bsearch(&key, filter->event_filters, | |
127 | filter->filters, | |
128 | sizeof(*filter->event_filters), | |
129 | filter_cmp); | |
130 | ||
131 | return filter_type; | |
132 | } | |
133 | ||
134 | static struct filter_type * | |
135 | add_filter_type(struct event_filter *filter, int id) | |
136 | { | |
137 | struct filter_type *filter_type; | |
138 | int i; | |
139 | ||
140 | filter_type = find_filter_type(filter, id); | |
141 | if (filter_type) | |
142 | return filter_type; | |
143 | ||
ef3072cd NK |
144 | filter_type = realloc(filter->event_filters, |
145 | sizeof(*filter->event_filters) * | |
146 | (filter->filters + 1)); | |
147 | if (!filter_type) | |
148 | return NULL; | |
149 | ||
150 | filter->event_filters = filter_type; | |
f7d82350 SR |
151 | |
152 | for (i = 0; i < filter->filters; i++) { | |
153 | if (filter->event_filters[i].event_id > id) | |
154 | break; | |
155 | } | |
156 | ||
157 | if (i < filter->filters) | |
158 | memmove(&filter->event_filters[i+1], | |
159 | &filter->event_filters[i], | |
160 | sizeof(*filter->event_filters) * | |
161 | (filter->filters - i)); | |
162 | ||
163 | filter_type = &filter->event_filters[i]; | |
164 | filter_type->event_id = id; | |
165 | filter_type->event = pevent_find_event(filter->pevent, id); | |
166 | filter_type->filter = NULL; | |
167 | ||
168 | filter->filters++; | |
169 | ||
170 | return filter_type; | |
171 | } | |
172 | ||
173 | /** | |
174 | * pevent_filter_alloc - create a new event filter | |
175 | * @pevent: The pevent that this filter is associated with | |
176 | */ | |
177 | struct event_filter *pevent_filter_alloc(struct pevent *pevent) | |
178 | { | |
179 | struct event_filter *filter; | |
180 | ||
4f244163 NK |
181 | filter = malloc(sizeof(*filter)); |
182 | if (filter == NULL) | |
183 | return NULL; | |
184 | ||
f7d82350 SR |
185 | memset(filter, 0, sizeof(*filter)); |
186 | filter->pevent = pevent; | |
187 | pevent_ref(pevent); | |
188 | ||
189 | return filter; | |
190 | } | |
191 | ||
192 | static struct filter_arg *allocate_arg(void) | |
193 | { | |
2e4eb10d | 194 | return calloc(1, sizeof(struct filter_arg)); |
f7d82350 SR |
195 | } |
196 | ||
197 | static void free_arg(struct filter_arg *arg) | |
198 | { | |
199 | if (!arg) | |
200 | return; | |
201 | ||
202 | switch (arg->type) { | |
203 | case FILTER_ARG_NONE: | |
204 | case FILTER_ARG_BOOLEAN: | |
743df75f SR |
205 | break; |
206 | ||
f7d82350 | 207 | case FILTER_ARG_NUM: |
743df75f SR |
208 | free_arg(arg->num.left); |
209 | free_arg(arg->num.right); | |
210 | break; | |
211 | ||
212 | case FILTER_ARG_EXP: | |
213 | free_arg(arg->exp.left); | |
214 | free_arg(arg->exp.right); | |
f7d82350 SR |
215 | break; |
216 | ||
217 | case FILTER_ARG_STR: | |
218 | free(arg->str.val); | |
219 | regfree(&arg->str.reg); | |
220 | free(arg->str.buffer); | |
221 | break; | |
222 | ||
743df75f SR |
223 | case FILTER_ARG_VALUE: |
224 | if (arg->value.type == FILTER_STRING || | |
225 | arg->value.type == FILTER_CHAR) | |
226 | free(arg->value.str); | |
227 | break; | |
228 | ||
f7d82350 SR |
229 | case FILTER_ARG_OP: |
230 | free_arg(arg->op.left); | |
231 | free_arg(arg->op.right); | |
232 | default: | |
233 | break; | |
234 | } | |
235 | ||
236 | free(arg); | |
237 | } | |
238 | ||
234520d3 | 239 | static int add_event(struct event_list **events, |
f7d82350 SR |
240 | struct event_format *event) |
241 | { | |
242 | struct event_list *list; | |
243 | ||
234520d3 NK |
244 | list = malloc(sizeof(*list)); |
245 | if (list == NULL) | |
246 | return -1; | |
247 | ||
f7d82350 SR |
248 | list->next = *events; |
249 | *events = list; | |
250 | list->event = event; | |
234520d3 | 251 | return 0; |
f7d82350 SR |
252 | } |
253 | ||
254 | static int event_match(struct event_format *event, | |
255 | regex_t *sreg, regex_t *ereg) | |
256 | { | |
257 | if (sreg) { | |
258 | return !regexec(sreg, event->system, 0, NULL, 0) && | |
259 | !regexec(ereg, event->name, 0, NULL, 0); | |
260 | } | |
261 | ||
262 | return !regexec(ereg, event->system, 0, NULL, 0) || | |
263 | !regexec(ereg, event->name, 0, NULL, 0); | |
264 | } | |
265 | ||
605b8fda | 266 | static enum pevent_errno |
f7d82350 SR |
267 | find_event(struct pevent *pevent, struct event_list **events, |
268 | char *sys_name, char *event_name) | |
269 | { | |
270 | struct event_format *event; | |
271 | regex_t ereg; | |
272 | regex_t sreg; | |
273 | int match = 0; | |
234520d3 | 274 | int fail = 0; |
f7d82350 SR |
275 | char *reg; |
276 | int ret; | |
277 | int i; | |
278 | ||
279 | if (!event_name) { | |
280 | /* if no name is given, then swap sys and name */ | |
281 | event_name = sys_name; | |
282 | sys_name = NULL; | |
283 | } | |
284 | ||
605b8fda NK |
285 | reg = malloc(strlen(event_name) + 3); |
286 | if (reg == NULL) | |
287 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; | |
288 | ||
f7d82350 SR |
289 | sprintf(reg, "^%s$", event_name); |
290 | ||
291 | ret = regcomp(&ereg, reg, REG_ICASE|REG_NOSUB); | |
292 | free(reg); | |
293 | ||
294 | if (ret) | |
605b8fda | 295 | return PEVENT_ERRNO__INVALID_EVENT_NAME; |
f7d82350 SR |
296 | |
297 | if (sys_name) { | |
605b8fda NK |
298 | reg = malloc(strlen(sys_name) + 3); |
299 | if (reg == NULL) { | |
300 | regfree(&ereg); | |
301 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; | |
302 | } | |
303 | ||
f7d82350 SR |
304 | sprintf(reg, "^%s$", sys_name); |
305 | ret = regcomp(&sreg, reg, REG_ICASE|REG_NOSUB); | |
306 | free(reg); | |
307 | if (ret) { | |
308 | regfree(&ereg); | |
605b8fda | 309 | return PEVENT_ERRNO__INVALID_EVENT_NAME; |
f7d82350 SR |
310 | } |
311 | } | |
312 | ||
313 | for (i = 0; i < pevent->nr_events; i++) { | |
314 | event = pevent->events[i]; | |
315 | if (event_match(event, sys_name ? &sreg : NULL, &ereg)) { | |
316 | match = 1; | |
234520d3 NK |
317 | if (add_event(events, event) < 0) { |
318 | fail = 1; | |
319 | break; | |
320 | } | |
f7d82350 SR |
321 | } |
322 | } | |
323 | ||
324 | regfree(&ereg); | |
325 | if (sys_name) | |
326 | regfree(&sreg); | |
327 | ||
328 | if (!match) | |
605b8fda | 329 | return PEVENT_ERRNO__EVENT_NOT_FOUND; |
234520d3 | 330 | if (fail) |
605b8fda | 331 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; |
f7d82350 SR |
332 | |
333 | return 0; | |
334 | } | |
335 | ||
336 | static void free_events(struct event_list *events) | |
337 | { | |
338 | struct event_list *event; | |
339 | ||
340 | while (events) { | |
341 | event = events; | |
342 | events = events->next; | |
343 | free(event); | |
344 | } | |
345 | } | |
346 | ||
c8ea690d | 347 | static enum pevent_errno |
eaec12d7 | 348 | create_arg_item(struct event_format *event, const char *token, |
bf19b82e | 349 | enum event_type type, struct filter_arg **parg, char *error_str) |
f7d82350 SR |
350 | { |
351 | struct format_field *field; | |
352 | struct filter_arg *arg; | |
353 | ||
354 | arg = allocate_arg(); | |
2e4eb10d NK |
355 | if (arg == NULL) { |
356 | show_error(error_str, "failed to allocate filter arg"); | |
c8ea690d | 357 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; |
2e4eb10d | 358 | } |
f7d82350 SR |
359 | |
360 | switch (type) { | |
361 | ||
362 | case EVENT_SQUOTE: | |
363 | case EVENT_DQUOTE: | |
364 | arg->type = FILTER_ARG_VALUE; | |
365 | arg->value.type = | |
366 | type == EVENT_DQUOTE ? FILTER_STRING : FILTER_CHAR; | |
367 | arg->value.str = strdup(token); | |
2036fcd1 NK |
368 | if (!arg->value.str) { |
369 | free_arg(arg); | |
370 | show_error(error_str, "failed to allocate string filter arg"); | |
c8ea690d | 371 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; |
2036fcd1 | 372 | } |
f7d82350 SR |
373 | break; |
374 | case EVENT_ITEM: | |
375 | /* if it is a number, then convert it */ | |
376 | if (isdigit(token[0])) { | |
377 | arg->type = FILTER_ARG_VALUE; | |
378 | arg->value.type = FILTER_NUMBER; | |
379 | arg->value.val = strtoull(token, NULL, 0); | |
380 | break; | |
381 | } | |
382 | /* Consider this a field */ | |
383 | field = pevent_find_any_field(event, token); | |
384 | if (!field) { | |
385 | if (strcmp(token, COMM) != 0) { | |
386 | /* not a field, Make it false */ | |
387 | arg->type = FILTER_ARG_BOOLEAN; | |
668fe01f | 388 | arg->boolean.value = FILTER_FALSE; |
f7d82350 SR |
389 | break; |
390 | } | |
391 | /* If token is 'COMM' then it is special */ | |
392 | field = &comm; | |
393 | } | |
394 | arg->type = FILTER_ARG_FIELD; | |
395 | arg->field.field = field; | |
396 | break; | |
397 | default: | |
398 | free_arg(arg); | |
c8ea690d NK |
399 | show_error(error_str, "expected a value but found %s", token); |
400 | return PEVENT_ERRNO__UNEXPECTED_TYPE; | |
f7d82350 | 401 | } |
c8ea690d NK |
402 | *parg = arg; |
403 | return 0; | |
f7d82350 SR |
404 | } |
405 | ||
406 | static struct filter_arg * | |
407 | create_arg_op(enum filter_op_type btype) | |
408 | { | |
409 | struct filter_arg *arg; | |
410 | ||
411 | arg = allocate_arg(); | |
2e4eb10d NK |
412 | if (!arg) |
413 | return NULL; | |
414 | ||
f7d82350 SR |
415 | arg->type = FILTER_ARG_OP; |
416 | arg->op.type = btype; | |
417 | ||
418 | return arg; | |
419 | } | |
420 | ||
421 | static struct filter_arg * | |
422 | create_arg_exp(enum filter_exp_type etype) | |
423 | { | |
424 | struct filter_arg *arg; | |
425 | ||
426 | arg = allocate_arg(); | |
2e4eb10d NK |
427 | if (!arg) |
428 | return NULL; | |
429 | ||
f7d82350 SR |
430 | arg->type = FILTER_ARG_EXP; |
431 | arg->op.type = etype; | |
432 | ||
433 | return arg; | |
434 | } | |
435 | ||
436 | static struct filter_arg * | |
437 | create_arg_cmp(enum filter_exp_type etype) | |
438 | { | |
439 | struct filter_arg *arg; | |
440 | ||
441 | arg = allocate_arg(); | |
2e4eb10d NK |
442 | if (!arg) |
443 | return NULL; | |
444 | ||
f7d82350 SR |
445 | /* Use NUM and change if necessary */ |
446 | arg->type = FILTER_ARG_NUM; | |
447 | arg->op.type = etype; | |
448 | ||
449 | return arg; | |
450 | } | |
451 | ||
02d62d6d | 452 | static enum pevent_errno |
bf19b82e | 453 | add_right(struct filter_arg *op, struct filter_arg *arg, char *error_str) |
f7d82350 SR |
454 | { |
455 | struct filter_arg *left; | |
456 | char *str; | |
457 | int op_type; | |
458 | int ret; | |
459 | ||
460 | switch (op->type) { | |
461 | case FILTER_ARG_EXP: | |
462 | if (op->exp.right) | |
463 | goto out_fail; | |
464 | op->exp.right = arg; | |
465 | break; | |
466 | ||
467 | case FILTER_ARG_OP: | |
468 | if (op->op.right) | |
469 | goto out_fail; | |
470 | op->op.right = arg; | |
471 | break; | |
472 | ||
473 | case FILTER_ARG_NUM: | |
474 | if (op->op.right) | |
475 | goto out_fail; | |
476 | /* | |
477 | * The arg must be num, str, or field | |
478 | */ | |
479 | switch (arg->type) { | |
480 | case FILTER_ARG_VALUE: | |
481 | case FILTER_ARG_FIELD: | |
482 | break; | |
483 | default: | |
02d62d6d NK |
484 | show_error(error_str, "Illegal rvalue"); |
485 | return PEVENT_ERRNO__ILLEGAL_RVALUE; | |
f7d82350 SR |
486 | } |
487 | ||
488 | /* | |
489 | * Depending on the type, we may need to | |
490 | * convert this to a string or regex. | |
491 | */ | |
492 | switch (arg->value.type) { | |
493 | case FILTER_CHAR: | |
494 | /* | |
495 | * A char should be converted to number if | |
496 | * the string is 1 byte, and the compare | |
497 | * is not a REGEX. | |
498 | */ | |
499 | if (strlen(arg->value.str) == 1 && | |
500 | op->num.type != FILTER_CMP_REGEX && | |
501 | op->num.type != FILTER_CMP_NOT_REGEX) { | |
502 | arg->value.type = FILTER_NUMBER; | |
503 | goto do_int; | |
504 | } | |
505 | /* fall through */ | |
506 | case FILTER_STRING: | |
507 | ||
508 | /* convert op to a string arg */ | |
509 | op_type = op->num.type; | |
510 | left = op->num.left; | |
511 | str = arg->value.str; | |
512 | ||
513 | /* reset the op for the new field */ | |
514 | memset(op, 0, sizeof(*op)); | |
515 | ||
516 | /* | |
517 | * If left arg was a field not found then | |
518 | * NULL the entire op. | |
519 | */ | |
520 | if (left->type == FILTER_ARG_BOOLEAN) { | |
521 | free_arg(left); | |
522 | free_arg(arg); | |
523 | op->type = FILTER_ARG_BOOLEAN; | |
668fe01f | 524 | op->boolean.value = FILTER_FALSE; |
f7d82350 SR |
525 | break; |
526 | } | |
527 | ||
528 | /* Left arg must be a field */ | |
529 | if (left->type != FILTER_ARG_FIELD) { | |
530 | show_error(error_str, | |
531 | "Illegal lvalue for string comparison"); | |
02d62d6d | 532 | return PEVENT_ERRNO__ILLEGAL_LVALUE; |
f7d82350 SR |
533 | } |
534 | ||
535 | /* Make sure this is a valid string compare */ | |
536 | switch (op_type) { | |
537 | case FILTER_CMP_EQ: | |
538 | op_type = FILTER_CMP_MATCH; | |
539 | break; | |
540 | case FILTER_CMP_NE: | |
541 | op_type = FILTER_CMP_NOT_MATCH; | |
542 | break; | |
543 | ||
544 | case FILTER_CMP_REGEX: | |
545 | case FILTER_CMP_NOT_REGEX: | |
546 | ret = regcomp(&op->str.reg, str, REG_ICASE|REG_NOSUB); | |
547 | if (ret) { | |
548 | show_error(error_str, | |
549 | "RegEx '%s' did not compute", | |
550 | str); | |
02d62d6d | 551 | return PEVENT_ERRNO__INVALID_REGEX; |
f7d82350 SR |
552 | } |
553 | break; | |
554 | default: | |
555 | show_error(error_str, | |
556 | "Illegal comparison for string"); | |
02d62d6d | 557 | return PEVENT_ERRNO__ILLEGAL_STRING_CMP; |
f7d82350 SR |
558 | } |
559 | ||
560 | op->type = FILTER_ARG_STR; | |
561 | op->str.type = op_type; | |
562 | op->str.field = left->field.field; | |
563 | op->str.val = strdup(str); | |
02d62d6d NK |
564 | if (!op->str.val) { |
565 | show_error(error_str, "Failed to allocate string filter"); | |
566 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; | |
567 | } | |
f7d82350 SR |
568 | /* |
569 | * Need a buffer to copy data for tests | |
570 | */ | |
02d62d6d NK |
571 | op->str.buffer = malloc(op->str.field->size + 1); |
572 | if (!op->str.buffer) { | |
573 | show_error(error_str, "Failed to allocate string filter"); | |
574 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; | |
575 | } | |
f7d82350 SR |
576 | /* Null terminate this buffer */ |
577 | op->str.buffer[op->str.field->size] = 0; | |
578 | ||
579 | /* We no longer have left or right args */ | |
580 | free_arg(arg); | |
581 | free_arg(left); | |
582 | ||
583 | break; | |
584 | ||
585 | case FILTER_NUMBER: | |
586 | ||
587 | do_int: | |
588 | switch (op->num.type) { | |
589 | case FILTER_CMP_REGEX: | |
590 | case FILTER_CMP_NOT_REGEX: | |
591 | show_error(error_str, | |
592 | "Op not allowed with integers"); | |
02d62d6d | 593 | return PEVENT_ERRNO__ILLEGAL_INTEGER_CMP; |
f7d82350 SR |
594 | |
595 | default: | |
596 | break; | |
597 | } | |
598 | ||
599 | /* numeric compare */ | |
600 | op->num.right = arg; | |
601 | break; | |
602 | default: | |
603 | goto out_fail; | |
604 | } | |
605 | break; | |
606 | default: | |
607 | goto out_fail; | |
608 | } | |
609 | ||
610 | return 0; | |
611 | ||
612 | out_fail: | |
02d62d6d NK |
613 | show_error(error_str, "Syntax error"); |
614 | return PEVENT_ERRNO__SYNTAX_ERROR; | |
f7d82350 SR |
615 | } |
616 | ||
617 | static struct filter_arg * | |
618 | rotate_op_right(struct filter_arg *a, struct filter_arg *b) | |
619 | { | |
620 | struct filter_arg *arg; | |
621 | ||
622 | arg = a->op.right; | |
623 | a->op.right = b; | |
624 | return arg; | |
625 | } | |
626 | ||
ff533fc0 | 627 | static enum pevent_errno add_left(struct filter_arg *op, struct filter_arg *arg) |
f7d82350 SR |
628 | { |
629 | switch (op->type) { | |
630 | case FILTER_ARG_EXP: | |
631 | if (arg->type == FILTER_ARG_OP) | |
632 | arg = rotate_op_right(arg, op); | |
633 | op->exp.left = arg; | |
634 | break; | |
635 | ||
636 | case FILTER_ARG_OP: | |
637 | op->op.left = arg; | |
638 | break; | |
639 | case FILTER_ARG_NUM: | |
640 | if (arg->type == FILTER_ARG_OP) | |
641 | arg = rotate_op_right(arg, op); | |
642 | ||
643 | /* left arg of compares must be a field */ | |
644 | if (arg->type != FILTER_ARG_FIELD && | |
645 | arg->type != FILTER_ARG_BOOLEAN) | |
ff533fc0 | 646 | return PEVENT_ERRNO__INVALID_ARG_TYPE; |
f7d82350 SR |
647 | op->num.left = arg; |
648 | break; | |
649 | default: | |
ff533fc0 | 650 | return PEVENT_ERRNO__INVALID_ARG_TYPE; |
f7d82350 SR |
651 | } |
652 | return 0; | |
653 | } | |
654 | ||
655 | enum op_type { | |
656 | OP_NONE, | |
657 | OP_BOOL, | |
658 | OP_NOT, | |
659 | OP_EXP, | |
660 | OP_CMP, | |
661 | }; | |
662 | ||
663 | static enum op_type process_op(const char *token, | |
664 | enum filter_op_type *btype, | |
665 | enum filter_cmp_type *ctype, | |
666 | enum filter_exp_type *etype) | |
667 | { | |
668 | *btype = FILTER_OP_NOT; | |
669 | *etype = FILTER_EXP_NONE; | |
670 | *ctype = FILTER_CMP_NONE; | |
671 | ||
672 | if (strcmp(token, "&&") == 0) | |
673 | *btype = FILTER_OP_AND; | |
674 | else if (strcmp(token, "||") == 0) | |
675 | *btype = FILTER_OP_OR; | |
676 | else if (strcmp(token, "!") == 0) | |
677 | return OP_NOT; | |
678 | ||
679 | if (*btype != FILTER_OP_NOT) | |
680 | return OP_BOOL; | |
681 | ||
682 | /* Check for value expressions */ | |
683 | if (strcmp(token, "+") == 0) { | |
684 | *etype = FILTER_EXP_ADD; | |
685 | } else if (strcmp(token, "-") == 0) { | |
686 | *etype = FILTER_EXP_SUB; | |
687 | } else if (strcmp(token, "*") == 0) { | |
688 | *etype = FILTER_EXP_MUL; | |
689 | } else if (strcmp(token, "/") == 0) { | |
690 | *etype = FILTER_EXP_DIV; | |
691 | } else if (strcmp(token, "%") == 0) { | |
692 | *etype = FILTER_EXP_MOD; | |
693 | } else if (strcmp(token, ">>") == 0) { | |
694 | *etype = FILTER_EXP_RSHIFT; | |
695 | } else if (strcmp(token, "<<") == 0) { | |
696 | *etype = FILTER_EXP_LSHIFT; | |
697 | } else if (strcmp(token, "&") == 0) { | |
698 | *etype = FILTER_EXP_AND; | |
699 | } else if (strcmp(token, "|") == 0) { | |
700 | *etype = FILTER_EXP_OR; | |
701 | } else if (strcmp(token, "^") == 0) { | |
702 | *etype = FILTER_EXP_XOR; | |
703 | } else if (strcmp(token, "~") == 0) | |
704 | *etype = FILTER_EXP_NOT; | |
705 | ||
706 | if (*etype != FILTER_EXP_NONE) | |
707 | return OP_EXP; | |
708 | ||
709 | /* Check for compares */ | |
710 | if (strcmp(token, "==") == 0) | |
711 | *ctype = FILTER_CMP_EQ; | |
712 | else if (strcmp(token, "!=") == 0) | |
713 | *ctype = FILTER_CMP_NE; | |
714 | else if (strcmp(token, "<") == 0) | |
715 | *ctype = FILTER_CMP_LT; | |
716 | else if (strcmp(token, ">") == 0) | |
717 | *ctype = FILTER_CMP_GT; | |
718 | else if (strcmp(token, "<=") == 0) | |
719 | *ctype = FILTER_CMP_LE; | |
720 | else if (strcmp(token, ">=") == 0) | |
721 | *ctype = FILTER_CMP_GE; | |
722 | else if (strcmp(token, "=~") == 0) | |
723 | *ctype = FILTER_CMP_REGEX; | |
724 | else if (strcmp(token, "!~") == 0) | |
725 | *ctype = FILTER_CMP_NOT_REGEX; | |
726 | else | |
727 | return OP_NONE; | |
728 | ||
729 | return OP_CMP; | |
730 | } | |
731 | ||
732 | static int check_op_done(struct filter_arg *arg) | |
733 | { | |
734 | switch (arg->type) { | |
735 | case FILTER_ARG_EXP: | |
736 | return arg->exp.right != NULL; | |
737 | ||
738 | case FILTER_ARG_OP: | |
739 | return arg->op.right != NULL; | |
740 | ||
741 | case FILTER_ARG_NUM: | |
742 | return arg->num.right != NULL; | |
743 | ||
744 | case FILTER_ARG_STR: | |
745 | /* A string conversion is always done */ | |
746 | return 1; | |
747 | ||
748 | case FILTER_ARG_BOOLEAN: | |
749 | /* field not found, is ok */ | |
750 | return 1; | |
751 | ||
752 | default: | |
753 | return 0; | |
754 | } | |
755 | } | |
756 | ||
757 | enum filter_vals { | |
758 | FILTER_VAL_NORM, | |
759 | FILTER_VAL_FALSE, | |
760 | FILTER_VAL_TRUE, | |
761 | }; | |
762 | ||
7bb73553 NK |
763 | static enum pevent_errno |
764 | reparent_op_arg(struct filter_arg *parent, struct filter_arg *old_child, | |
bf19b82e | 765 | struct filter_arg *arg, char *error_str) |
f7d82350 SR |
766 | { |
767 | struct filter_arg *other_child; | |
768 | struct filter_arg **ptr; | |
769 | ||
770 | if (parent->type != FILTER_ARG_OP && | |
7bb73553 NK |
771 | arg->type != FILTER_ARG_OP) { |
772 | show_error(error_str, "can not reparent other than OP"); | |
773 | return PEVENT_ERRNO__REPARENT_NOT_OP; | |
774 | } | |
f7d82350 SR |
775 | |
776 | /* Get the sibling */ | |
777 | if (old_child->op.right == arg) { | |
778 | ptr = &old_child->op.right; | |
779 | other_child = old_child->op.left; | |
780 | } else if (old_child->op.left == arg) { | |
781 | ptr = &old_child->op.left; | |
782 | other_child = old_child->op.right; | |
7bb73553 NK |
783 | } else { |
784 | show_error(error_str, "Error in reparent op, find other child"); | |
785 | return PEVENT_ERRNO__REPARENT_FAILED; | |
786 | } | |
f7d82350 SR |
787 | |
788 | /* Detach arg from old_child */ | |
789 | *ptr = NULL; | |
790 | ||
791 | /* Check for root */ | |
792 | if (parent == old_child) { | |
793 | free_arg(other_child); | |
794 | *parent = *arg; | |
795 | /* Free arg without recussion */ | |
796 | free(arg); | |
7bb73553 | 797 | return 0; |
f7d82350 SR |
798 | } |
799 | ||
800 | if (parent->op.right == old_child) | |
801 | ptr = &parent->op.right; | |
802 | else if (parent->op.left == old_child) | |
803 | ptr = &parent->op.left; | |
7bb73553 NK |
804 | else { |
805 | show_error(error_str, "Error in reparent op"); | |
806 | return PEVENT_ERRNO__REPARENT_FAILED; | |
807 | } | |
808 | ||
f7d82350 SR |
809 | *ptr = arg; |
810 | ||
811 | free_arg(old_child); | |
7bb73553 | 812 | return 0; |
f7d82350 SR |
813 | } |
814 | ||
7bb73553 NK |
815 | /* Returns either filter_vals (success) or pevent_errno (failfure) */ |
816 | static int test_arg(struct filter_arg *parent, struct filter_arg *arg, | |
bf19b82e | 817 | char *error_str) |
f7d82350 | 818 | { |
7bb73553 | 819 | int lval, rval; |
f7d82350 SR |
820 | |
821 | switch (arg->type) { | |
822 | ||
823 | /* bad case */ | |
824 | case FILTER_ARG_BOOLEAN: | |
668fe01f | 825 | return FILTER_VAL_FALSE + arg->boolean.value; |
f7d82350 SR |
826 | |
827 | /* good cases: */ | |
828 | case FILTER_ARG_STR: | |
829 | case FILTER_ARG_VALUE: | |
830 | case FILTER_ARG_FIELD: | |
831 | return FILTER_VAL_NORM; | |
832 | ||
833 | case FILTER_ARG_EXP: | |
7bb73553 | 834 | lval = test_arg(arg, arg->exp.left, error_str); |
f7d82350 SR |
835 | if (lval != FILTER_VAL_NORM) |
836 | return lval; | |
7bb73553 | 837 | rval = test_arg(arg, arg->exp.right, error_str); |
f7d82350 SR |
838 | if (rval != FILTER_VAL_NORM) |
839 | return rval; | |
840 | return FILTER_VAL_NORM; | |
841 | ||
842 | case FILTER_ARG_NUM: | |
7bb73553 | 843 | lval = test_arg(arg, arg->num.left, error_str); |
f7d82350 SR |
844 | if (lval != FILTER_VAL_NORM) |
845 | return lval; | |
7bb73553 | 846 | rval = test_arg(arg, arg->num.right, error_str); |
f7d82350 SR |
847 | if (rval != FILTER_VAL_NORM) |
848 | return rval; | |
849 | return FILTER_VAL_NORM; | |
850 | ||
851 | case FILTER_ARG_OP: | |
852 | if (arg->op.type != FILTER_OP_NOT) { | |
7bb73553 | 853 | lval = test_arg(arg, arg->op.left, error_str); |
f7d82350 SR |
854 | switch (lval) { |
855 | case FILTER_VAL_NORM: | |
856 | break; | |
857 | case FILTER_VAL_TRUE: | |
858 | if (arg->op.type == FILTER_OP_OR) | |
859 | return FILTER_VAL_TRUE; | |
7bb73553 | 860 | rval = test_arg(arg, arg->op.right, error_str); |
f7d82350 SR |
861 | if (rval != FILTER_VAL_NORM) |
862 | return rval; | |
863 | ||
7bb73553 NK |
864 | return reparent_op_arg(parent, arg, arg->op.right, |
865 | error_str); | |
f7d82350 SR |
866 | |
867 | case FILTER_VAL_FALSE: | |
868 | if (arg->op.type == FILTER_OP_AND) | |
869 | return FILTER_VAL_FALSE; | |
7bb73553 | 870 | rval = test_arg(arg, arg->op.right, error_str); |
f7d82350 SR |
871 | if (rval != FILTER_VAL_NORM) |
872 | return rval; | |
873 | ||
7bb73553 NK |
874 | return reparent_op_arg(parent, arg, arg->op.right, |
875 | error_str); | |
876 | ||
877 | default: | |
878 | return lval; | |
f7d82350 SR |
879 | } |
880 | } | |
881 | ||
7bb73553 | 882 | rval = test_arg(arg, arg->op.right, error_str); |
f7d82350 SR |
883 | switch (rval) { |
884 | case FILTER_VAL_NORM: | |
7bb73553 | 885 | default: |
f7d82350 | 886 | break; |
7bb73553 | 887 | |
f7d82350 SR |
888 | case FILTER_VAL_TRUE: |
889 | if (arg->op.type == FILTER_OP_OR) | |
890 | return FILTER_VAL_TRUE; | |
891 | if (arg->op.type == FILTER_OP_NOT) | |
892 | return FILTER_VAL_FALSE; | |
893 | ||
7bb73553 NK |
894 | return reparent_op_arg(parent, arg, arg->op.left, |
895 | error_str); | |
f7d82350 SR |
896 | |
897 | case FILTER_VAL_FALSE: | |
898 | if (arg->op.type == FILTER_OP_AND) | |
899 | return FILTER_VAL_FALSE; | |
900 | if (arg->op.type == FILTER_OP_NOT) | |
901 | return FILTER_VAL_TRUE; | |
902 | ||
7bb73553 NK |
903 | return reparent_op_arg(parent, arg, arg->op.left, |
904 | error_str); | |
f7d82350 SR |
905 | } |
906 | ||
7bb73553 | 907 | return rval; |
f7d82350 | 908 | default: |
7bb73553 NK |
909 | show_error(error_str, "bad arg in filter tree"); |
910 | return PEVENT_ERRNO__BAD_FILTER_ARG; | |
f7d82350 SR |
911 | } |
912 | return FILTER_VAL_NORM; | |
913 | } | |
914 | ||
915 | /* Remove any unknown event fields */ | |
42d6194d | 916 | static int collapse_tree(struct filter_arg *arg, |
bf19b82e | 917 | struct filter_arg **arg_collapsed, char *error_str) |
f7d82350 | 918 | { |
42d6194d | 919 | int ret; |
f7d82350 | 920 | |
7bb73553 | 921 | ret = test_arg(arg, arg, error_str); |
f7d82350 SR |
922 | switch (ret) { |
923 | case FILTER_VAL_NORM: | |
7bb73553 | 924 | break; |
f7d82350 SR |
925 | |
926 | case FILTER_VAL_TRUE: | |
927 | case FILTER_VAL_FALSE: | |
928 | free_arg(arg); | |
929 | arg = allocate_arg(); | |
2e4eb10d NK |
930 | if (arg) { |
931 | arg->type = FILTER_ARG_BOOLEAN; | |
932 | arg->boolean.value = ret == FILTER_VAL_TRUE; | |
7bb73553 NK |
933 | } else { |
934 | show_error(error_str, "Failed to allocate filter arg"); | |
42d6194d | 935 | ret = PEVENT_ERRNO__MEM_ALLOC_FAILED; |
2e4eb10d | 936 | } |
7bb73553 NK |
937 | break; |
938 | ||
939 | default: | |
940 | /* test_arg() already set the error_str */ | |
941 | free_arg(arg); | |
942 | arg = NULL; | |
943 | break; | |
f7d82350 SR |
944 | } |
945 | ||
42d6194d NK |
946 | *arg_collapsed = arg; |
947 | return ret; | |
f7d82350 SR |
948 | } |
949 | ||
42d6194d | 950 | static enum pevent_errno |
f7d82350 | 951 | process_filter(struct event_format *event, struct filter_arg **parg, |
bf19b82e | 952 | char *error_str, int not) |
f7d82350 SR |
953 | { |
954 | enum event_type type; | |
955 | char *token = NULL; | |
956 | struct filter_arg *current_op = NULL; | |
957 | struct filter_arg *current_exp = NULL; | |
958 | struct filter_arg *left_item = NULL; | |
959 | struct filter_arg *arg = NULL; | |
960 | enum op_type op_type; | |
961 | enum filter_op_type btype; | |
962 | enum filter_exp_type etype; | |
963 | enum filter_cmp_type ctype; | |
42d6194d | 964 | enum pevent_errno ret; |
f7d82350 SR |
965 | |
966 | *parg = NULL; | |
967 | ||
968 | do { | |
969 | free(token); | |
970 | type = read_token(&token); | |
971 | switch (type) { | |
972 | case EVENT_SQUOTE: | |
973 | case EVENT_DQUOTE: | |
974 | case EVENT_ITEM: | |
c8ea690d NK |
975 | ret = create_arg_item(event, token, type, &arg, error_str); |
976 | if (ret < 0) | |
f7d82350 SR |
977 | goto fail; |
978 | if (!left_item) | |
979 | left_item = arg; | |
980 | else if (current_exp) { | |
981 | ret = add_right(current_exp, arg, error_str); | |
982 | if (ret < 0) | |
983 | goto fail; | |
984 | left_item = NULL; | |
985 | /* Not's only one one expression */ | |
986 | if (not) { | |
987 | arg = NULL; | |
988 | if (current_op) | |
42d6194d | 989 | goto fail_syntax; |
f7d82350 SR |
990 | free(token); |
991 | *parg = current_exp; | |
992 | return 0; | |
993 | } | |
994 | } else | |
42d6194d | 995 | goto fail_syntax; |
f7d82350 SR |
996 | arg = NULL; |
997 | break; | |
998 | ||
999 | case EVENT_DELIM: | |
1000 | if (*token == ',') { | |
42d6194d NK |
1001 | show_error(error_str, "Illegal token ','"); |
1002 | ret = PEVENT_ERRNO__ILLEGAL_TOKEN; | |
f7d82350 SR |
1003 | goto fail; |
1004 | } | |
1005 | ||
1006 | if (*token == '(') { | |
1007 | if (left_item) { | |
1008 | show_error(error_str, | |
1009 | "Open paren can not come after item"); | |
42d6194d | 1010 | ret = PEVENT_ERRNO__INVALID_PAREN; |
f7d82350 SR |
1011 | goto fail; |
1012 | } | |
1013 | if (current_exp) { | |
1014 | show_error(error_str, | |
1015 | "Open paren can not come after expression"); | |
42d6194d | 1016 | ret = PEVENT_ERRNO__INVALID_PAREN; |
f7d82350 SR |
1017 | goto fail; |
1018 | } | |
1019 | ||
1020 | ret = process_filter(event, &arg, error_str, 0); | |
42d6194d NK |
1021 | if (ret != PEVENT_ERRNO__UNBALANCED_PAREN) { |
1022 | if (ret == 0) { | |
f7d82350 SR |
1023 | show_error(error_str, |
1024 | "Unbalanced number of '('"); | |
42d6194d NK |
1025 | ret = PEVENT_ERRNO__UNBALANCED_PAREN; |
1026 | } | |
f7d82350 SR |
1027 | goto fail; |
1028 | } | |
1029 | ret = 0; | |
1030 | ||
1031 | /* A not wants just one expression */ | |
1032 | if (not) { | |
1033 | if (current_op) | |
42d6194d | 1034 | goto fail_syntax; |
f7d82350 SR |
1035 | *parg = arg; |
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | if (current_op) | |
1040 | ret = add_right(current_op, arg, error_str); | |
1041 | else | |
1042 | current_exp = arg; | |
1043 | ||
1044 | if (ret < 0) | |
1045 | goto fail; | |
1046 | ||
1047 | } else { /* ')' */ | |
1048 | if (!current_op && !current_exp) | |
42d6194d | 1049 | goto fail_syntax; |
f7d82350 SR |
1050 | |
1051 | /* Make sure everything is finished at this level */ | |
1052 | if (current_exp && !check_op_done(current_exp)) | |
42d6194d | 1053 | goto fail_syntax; |
f7d82350 | 1054 | if (current_op && !check_op_done(current_op)) |
42d6194d | 1055 | goto fail_syntax; |
f7d82350 SR |
1056 | |
1057 | if (current_op) | |
1058 | *parg = current_op; | |
1059 | else | |
1060 | *parg = current_exp; | |
e1644aae | 1061 | free(token); |
42d6194d | 1062 | return PEVENT_ERRNO__UNBALANCED_PAREN; |
f7d82350 SR |
1063 | } |
1064 | break; | |
1065 | ||
1066 | case EVENT_OP: | |
1067 | op_type = process_op(token, &btype, &ctype, &etype); | |
1068 | ||
1069 | /* All expect a left arg except for NOT */ | |
1070 | switch (op_type) { | |
1071 | case OP_BOOL: | |
1072 | /* Logic ops need a left expression */ | |
1073 | if (!current_exp && !current_op) | |
42d6194d | 1074 | goto fail_syntax; |
f7d82350 SR |
1075 | /* fall through */ |
1076 | case OP_NOT: | |
1077 | /* logic only processes ops and exp */ | |
1078 | if (left_item) | |
42d6194d | 1079 | goto fail_syntax; |
f7d82350 SR |
1080 | break; |
1081 | case OP_EXP: | |
1082 | case OP_CMP: | |
1083 | if (!left_item) | |
42d6194d | 1084 | goto fail_syntax; |
f7d82350 SR |
1085 | break; |
1086 | case OP_NONE: | |
1087 | show_error(error_str, | |
1088 | "Unknown op token %s", token); | |
42d6194d | 1089 | ret = PEVENT_ERRNO__UNKNOWN_TOKEN; |
f7d82350 SR |
1090 | goto fail; |
1091 | } | |
1092 | ||
1093 | ret = 0; | |
1094 | switch (op_type) { | |
1095 | case OP_BOOL: | |
1096 | arg = create_arg_op(btype); | |
2e4eb10d NK |
1097 | if (arg == NULL) |
1098 | goto fail_alloc; | |
f7d82350 SR |
1099 | if (current_op) |
1100 | ret = add_left(arg, current_op); | |
1101 | else | |
1102 | ret = add_left(arg, current_exp); | |
1103 | current_op = arg; | |
1104 | current_exp = NULL; | |
1105 | break; | |
1106 | ||
1107 | case OP_NOT: | |
1108 | arg = create_arg_op(btype); | |
2e4eb10d NK |
1109 | if (arg == NULL) |
1110 | goto fail_alloc; | |
f7d82350 SR |
1111 | if (current_op) |
1112 | ret = add_right(current_op, arg, error_str); | |
1113 | if (ret < 0) | |
1114 | goto fail; | |
1115 | current_exp = arg; | |
1116 | ret = process_filter(event, &arg, error_str, 1); | |
1117 | if (ret < 0) | |
1118 | goto fail; | |
1119 | ret = add_right(current_exp, arg, error_str); | |
1120 | if (ret < 0) | |
1121 | goto fail; | |
1122 | break; | |
1123 | ||
1124 | case OP_EXP: | |
1125 | case OP_CMP: | |
1126 | if (op_type == OP_EXP) | |
1127 | arg = create_arg_exp(etype); | |
1128 | else | |
1129 | arg = create_arg_cmp(ctype); | |
2e4eb10d NK |
1130 | if (arg == NULL) |
1131 | goto fail_alloc; | |
f7d82350 SR |
1132 | |
1133 | if (current_op) | |
1134 | ret = add_right(current_op, arg, error_str); | |
1135 | if (ret < 0) | |
1136 | goto fail; | |
1137 | ret = add_left(arg, left_item); | |
1138 | if (ret < 0) { | |
1139 | arg = NULL; | |
42d6194d | 1140 | goto fail_syntax; |
f7d82350 SR |
1141 | } |
1142 | current_exp = arg; | |
1143 | break; | |
1144 | default: | |
1145 | break; | |
1146 | } | |
1147 | arg = NULL; | |
1148 | if (ret < 0) | |
42d6194d | 1149 | goto fail_syntax; |
f7d82350 SR |
1150 | break; |
1151 | case EVENT_NONE: | |
1152 | break; | |
91dfa49b NK |
1153 | case EVENT_ERROR: |
1154 | goto fail_alloc; | |
f7d82350 | 1155 | default: |
42d6194d | 1156 | goto fail_syntax; |
f7d82350 SR |
1157 | } |
1158 | } while (type != EVENT_NONE); | |
1159 | ||
1160 | if (!current_op && !current_exp) | |
42d6194d | 1161 | goto fail_syntax; |
f7d82350 SR |
1162 | |
1163 | if (!current_op) | |
1164 | current_op = current_exp; | |
1165 | ||
42d6194d | 1166 | ret = collapse_tree(current_op, parg, error_str); |
106b816c SR |
1167 | /* collapse_tree() may free current_op, and updates parg accordingly */ |
1168 | current_op = NULL; | |
42d6194d | 1169 | if (ret < 0) |
7bb73553 | 1170 | goto fail; |
f7d82350 | 1171 | |
e1644aae | 1172 | free(token); |
f7d82350 SR |
1173 | return 0; |
1174 | ||
2e4eb10d NK |
1175 | fail_alloc: |
1176 | show_error(error_str, "failed to allocate filter arg"); | |
42d6194d | 1177 | ret = PEVENT_ERRNO__MEM_ALLOC_FAILED; |
2e4eb10d | 1178 | goto fail; |
42d6194d | 1179 | fail_syntax: |
f7d82350 | 1180 | show_error(error_str, "Syntax error"); |
42d6194d | 1181 | ret = PEVENT_ERRNO__SYNTAX_ERROR; |
f7d82350 SR |
1182 | fail: |
1183 | free_arg(current_op); | |
1184 | free_arg(current_exp); | |
1185 | free_arg(arg); | |
1186 | free(token); | |
42d6194d | 1187 | return ret; |
f7d82350 SR |
1188 | } |
1189 | ||
69c770a6 | 1190 | static enum pevent_errno |
f7d82350 | 1191 | process_event(struct event_format *event, const char *filter_str, |
bf19b82e | 1192 | struct filter_arg **parg, char *error_str) |
f7d82350 SR |
1193 | { |
1194 | int ret; | |
1195 | ||
1196 | pevent_buffer_init(filter_str, strlen(filter_str)); | |
1197 | ||
1198 | ret = process_filter(event, parg, error_str, 0); | |
f7d82350 SR |
1199 | if (ret < 0) |
1200 | return ret; | |
1201 | ||
1202 | /* If parg is NULL, then make it into FALSE */ | |
1203 | if (!*parg) { | |
1204 | *parg = allocate_arg(); | |
69c770a6 NK |
1205 | if (*parg == NULL) |
1206 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; | |
1207 | ||
f7d82350 | 1208 | (*parg)->type = FILTER_ARG_BOOLEAN; |
668fe01f | 1209 | (*parg)->boolean.value = FILTER_FALSE; |
f7d82350 SR |
1210 | } |
1211 | ||
1212 | return 0; | |
1213 | } | |
1214 | ||
69c770a6 NK |
1215 | static enum pevent_errno |
1216 | filter_event(struct event_filter *filter, struct event_format *event, | |
bf19b82e | 1217 | const char *filter_str, char *error_str) |
f7d82350 SR |
1218 | { |
1219 | struct filter_type *filter_type; | |
1220 | struct filter_arg *arg; | |
69c770a6 | 1221 | enum pevent_errno ret; |
f7d82350 SR |
1222 | |
1223 | if (filter_str) { | |
1224 | ret = process_event(event, filter_str, &arg, error_str); | |
1225 | if (ret < 0) | |
1226 | return ret; | |
1227 | ||
1228 | } else { | |
1229 | /* just add a TRUE arg */ | |
1230 | arg = allocate_arg(); | |
69c770a6 NK |
1231 | if (arg == NULL) |
1232 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; | |
1233 | ||
f7d82350 | 1234 | arg->type = FILTER_ARG_BOOLEAN; |
668fe01f | 1235 | arg->boolean.value = FILTER_TRUE; |
f7d82350 SR |
1236 | } |
1237 | ||
1238 | filter_type = add_filter_type(filter, event->id); | |
69c770a6 NK |
1239 | if (filter_type == NULL) |
1240 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; | |
ef3072cd | 1241 | |
f7d82350 SR |
1242 | if (filter_type->filter) |
1243 | free_arg(filter_type->filter); | |
1244 | filter_type->filter = arg; | |
1245 | ||
1246 | return 0; | |
1247 | } | |
1248 | ||
bf19b82e NK |
1249 | static void filter_init_error_buf(struct event_filter *filter) |
1250 | { | |
1251 | /* clear buffer to reset show error */ | |
1252 | pevent_buffer_init("", 0); | |
1253 | filter->error_buffer[0] = '\0'; | |
1254 | } | |
1255 | ||
f7d82350 SR |
1256 | /** |
1257 | * pevent_filter_add_filter_str - add a new filter | |
1258 | * @filter: the event filter to add to | |
1259 | * @filter_str: the filter string that contains the filter | |
f7d82350 | 1260 | * |
69c770a6 | 1261 | * Returns 0 if the filter was successfully added or a |
bf19b82e NK |
1262 | * negative error code. Use pevent_filter_strerror() to see |
1263 | * actual error message in case of error. | |
f7d82350 | 1264 | */ |
69c770a6 NK |
1265 | enum pevent_errno pevent_filter_add_filter_str(struct event_filter *filter, |
1266 | const char *filter_str) | |
f7d82350 SR |
1267 | { |
1268 | struct pevent *pevent = filter->pevent; | |
1269 | struct event_list *event; | |
1270 | struct event_list *events = NULL; | |
1271 | const char *filter_start; | |
1272 | const char *next_event; | |
1273 | char *this_event; | |
1274 | char *event_name = NULL; | |
1275 | char *sys_name = NULL; | |
1276 | char *sp; | |
69c770a6 | 1277 | enum pevent_errno rtn = 0; /* PEVENT_ERRNO__SUCCESS */ |
f7d82350 SR |
1278 | int len; |
1279 | int ret; | |
1280 | ||
bf19b82e | 1281 | filter_init_error_buf(filter); |
f7d82350 | 1282 | |
f7d82350 SR |
1283 | filter_start = strchr(filter_str, ':'); |
1284 | if (filter_start) | |
1285 | len = filter_start - filter_str; | |
1286 | else | |
1287 | len = strlen(filter_str); | |
1288 | ||
f7d82350 SR |
1289 | do { |
1290 | next_event = strchr(filter_str, ','); | |
1291 | if (next_event && | |
1292 | (!filter_start || next_event < filter_start)) | |
1293 | len = next_event - filter_str; | |
1294 | else if (filter_start) | |
1295 | len = filter_start - filter_str; | |
1296 | else | |
1297 | len = strlen(filter_str); | |
1298 | ||
28942c87 NK |
1299 | this_event = malloc(len + 1); |
1300 | if (this_event == NULL) { | |
28942c87 NK |
1301 | /* This can only happen when events is NULL, but still */ |
1302 | free_events(events); | |
69c770a6 | 1303 | return PEVENT_ERRNO__MEM_ALLOC_FAILED; |
28942c87 | 1304 | } |
f7d82350 SR |
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) { | |
f7d82350 SR |
1317 | /* This can only happen when events is NULL, but still */ |
1318 | free_events(events); | |
1319 | free(this_event); | |
69c770a6 | 1320 | return PEVENT_ERRNO__FILTER_NOT_FOUND; |
f7d82350 SR |
1321 | } |
1322 | ||
1323 | /* Find this event */ | |
1324 | ret = find_event(pevent, &events, strim(sys_name), strim(event_name)); | |
1325 | if (ret < 0) { | |
f7d82350 SR |
1326 | free_events(events); |
1327 | free(this_event); | |
69c770a6 | 1328 | return ret; |
f7d82350 SR |
1329 | } |
1330 | free(this_event); | |
1331 | } while (filter_str); | |
1332 | ||
1333 | /* Skip the ':' */ | |
1334 | if (filter_start) | |
1335 | filter_start++; | |
1336 | ||
1337 | /* filter starts here */ | |
1338 | for (event = events; event; event = event->next) { | |
1339 | ret = filter_event(filter, event->event, filter_start, | |
bf19b82e | 1340 | filter->error_buffer); |
f7d82350 SR |
1341 | /* Failures are returned if a parse error happened */ |
1342 | if (ret < 0) | |
1343 | rtn = ret; | |
1344 | ||
1345 | if (ret >= 0 && pevent->test_filters) { | |
1346 | char *test; | |
1347 | test = pevent_filter_make_string(filter, event->event->id); | |
f23b24f1 NK |
1348 | if (test) { |
1349 | printf(" '%s: %s'\n", event->event->name, test); | |
1350 | free(test); | |
1351 | } | |
f7d82350 SR |
1352 | } |
1353 | } | |
1354 | ||
1355 | free_events(events); | |
1356 | ||
1357 | if (rtn >= 0 && pevent->test_filters) | |
1358 | exit(0); | |
1359 | ||
1360 | return rtn; | |
1361 | } | |
1362 | ||
1363 | static void free_filter_type(struct filter_type *filter_type) | |
1364 | { | |
1365 | free_arg(filter_type->filter); | |
1366 | } | |
1367 | ||
bf19b82e NK |
1368 | /** |
1369 | * pevent_filter_strerror - fill error message in a buffer | |
1370 | * @filter: the event filter contains error | |
1371 | * @err: the error code | |
1372 | * @buf: the buffer to be filled in | |
1373 | * @buflen: the size of the buffer | |
1374 | * | |
1375 | * Returns 0 if message was filled successfully, -1 if error | |
1376 | */ | |
1377 | int pevent_filter_strerror(struct event_filter *filter, enum pevent_errno err, | |
1378 | char *buf, size_t buflen) | |
1379 | { | |
1380 | if (err <= __PEVENT_ERRNO__START || err >= __PEVENT_ERRNO__END) | |
1381 | return -1; | |
1382 | ||
1383 | if (strlen(filter->error_buffer) > 0) { | |
1384 | size_t len = snprintf(buf, buflen, "%s", filter->error_buffer); | |
1385 | ||
1386 | if (len > buflen) | |
1387 | return -1; | |
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | return pevent_strerror(filter->pevent, err, buf, buflen); | |
1392 | } | |
1393 | ||
f7d82350 SR |
1394 | /** |
1395 | * pevent_filter_remove_event - remove a filter for an event | |
1396 | * @filter: the event filter to remove from | |
1397 | * @event_id: the event to remove a filter for | |
1398 | * | |
1399 | * Removes the filter saved for an event defined by @event_id | |
1400 | * from the @filter. | |
1401 | * | |
1402 | * Returns 1: if an event was removed | |
1403 | * 0: if the event was not found | |
1404 | */ | |
1405 | int pevent_filter_remove_event(struct event_filter *filter, | |
1406 | int event_id) | |
1407 | { | |
1408 | struct filter_type *filter_type; | |
1409 | unsigned long len; | |
1410 | ||
1411 | if (!filter->filters) | |
1412 | return 0; | |
1413 | ||
1414 | filter_type = find_filter_type(filter, event_id); | |
1415 | ||
1416 | if (!filter_type) | |
1417 | return 0; | |
1418 | ||
1419 | free_filter_type(filter_type); | |
1420 | ||
1421 | /* The filter_type points into the event_filters array */ | |
1422 | len = (unsigned long)(filter->event_filters + filter->filters) - | |
1423 | (unsigned long)(filter_type + 1); | |
1424 | ||
1425 | memmove(filter_type, filter_type + 1, len); | |
1426 | filter->filters--; | |
1427 | ||
1428 | memset(&filter->event_filters[filter->filters], 0, | |
1429 | sizeof(*filter_type)); | |
1430 | ||
1431 | return 1; | |
1432 | } | |
1433 | ||
1434 | /** | |
1435 | * pevent_filter_reset - clear all filters in a filter | |
1436 | * @filter: the event filter to reset | |
1437 | * | |
1438 | * Removes all filters from a filter and resets it. | |
1439 | */ | |
1440 | void pevent_filter_reset(struct event_filter *filter) | |
1441 | { | |
1442 | int i; | |
1443 | ||
1444 | for (i = 0; i < filter->filters; i++) | |
1445 | free_filter_type(&filter->event_filters[i]); | |
1446 | ||
1447 | free(filter->event_filters); | |
1448 | filter->filters = 0; | |
1449 | filter->event_filters = NULL; | |
1450 | } | |
1451 | ||
1452 | void pevent_filter_free(struct event_filter *filter) | |
1453 | { | |
1454 | pevent_unref(filter->pevent); | |
1455 | ||
1456 | pevent_filter_reset(filter); | |
1457 | ||
1458 | free(filter); | |
1459 | } | |
1460 | ||
1461 | static char *arg_to_str(struct event_filter *filter, struct filter_arg *arg); | |
1462 | ||
1463 | static int copy_filter_type(struct event_filter *filter, | |
1464 | struct event_filter *source, | |
1465 | struct filter_type *filter_type) | |
1466 | { | |
1467 | struct filter_arg *arg; | |
1468 | struct event_format *event; | |
1469 | const char *sys; | |
1470 | const char *name; | |
1471 | char *str; | |
1472 | ||
1473 | /* Can't assume that the pevent's are the same */ | |
1474 | sys = filter_type->event->system; | |
1475 | name = filter_type->event->name; | |
1476 | event = pevent_find_event_by_name(filter->pevent, sys, name); | |
1477 | if (!event) | |
1478 | return -1; | |
1479 | ||
1480 | str = arg_to_str(source, filter_type->filter); | |
1481 | if (!str) | |
1482 | return -1; | |
1483 | ||
1484 | if (strcmp(str, "TRUE") == 0 || strcmp(str, "FALSE") == 0) { | |
1485 | /* Add trivial event */ | |
1486 | arg = allocate_arg(); | |
2e4eb10d NK |
1487 | if (arg == NULL) |
1488 | return -1; | |
1489 | ||
f7d82350 SR |
1490 | arg->type = FILTER_ARG_BOOLEAN; |
1491 | if (strcmp(str, "TRUE") == 0) | |
668fe01f | 1492 | arg->boolean.value = 1; |
f7d82350 | 1493 | else |
668fe01f | 1494 | arg->boolean.value = 0; |
f7d82350 SR |
1495 | |
1496 | filter_type = add_filter_type(filter, event->id); | |
ef3072cd NK |
1497 | if (filter_type == NULL) |
1498 | return -1; | |
1499 | ||
f7d82350 SR |
1500 | filter_type->filter = arg; |
1501 | ||
1502 | free(str); | |
1503 | return 0; | |
1504 | } | |
1505 | ||
1506 | filter_event(filter, event, str, NULL); | |
1507 | free(str); | |
1508 | ||
1509 | return 0; | |
1510 | } | |
1511 | ||
1512 | /** | |
1513 | * pevent_filter_copy - copy a filter using another filter | |
1514 | * @dest - the filter to copy to | |
1515 | * @source - the filter to copy from | |
1516 | * | |
1517 | * Returns 0 on success and -1 if not all filters were copied | |
1518 | */ | |
1519 | int pevent_filter_copy(struct event_filter *dest, struct event_filter *source) | |
1520 | { | |
1521 | int ret = 0; | |
1522 | int i; | |
1523 | ||
1524 | pevent_filter_reset(dest); | |
1525 | ||
1526 | for (i = 0; i < source->filters; i++) { | |
1527 | if (copy_filter_type(dest, source, &source->event_filters[i])) | |
1528 | ret = -1; | |
1529 | } | |
1530 | return ret; | |
1531 | } | |
1532 | ||
1533 | ||
1534 | /** | |
1535 | * pevent_update_trivial - update the trivial filters with the given filter | |
1536 | * @dest - the filter to update | |
1537 | * @source - the filter as the source of the update | |
1538 | * @type - the type of trivial filter to update. | |
1539 | * | |
1540 | * Scan dest for trivial events matching @type to replace with the source. | |
1541 | * | |
1542 | * Returns 0 on success and -1 if there was a problem updating, but | |
1543 | * events may have still been updated on error. | |
1544 | */ | |
1545 | int pevent_update_trivial(struct event_filter *dest, struct event_filter *source, | |
1546 | enum filter_trivial_type type) | |
1547 | { | |
1548 | struct pevent *src_pevent; | |
1549 | struct pevent *dest_pevent; | |
1550 | struct event_format *event; | |
1551 | struct filter_type *filter_type; | |
1552 | struct filter_arg *arg; | |
1553 | char *str; | |
1554 | int i; | |
1555 | ||
1556 | src_pevent = source->pevent; | |
1557 | dest_pevent = dest->pevent; | |
1558 | ||
1559 | /* Do nothing if either of the filters has nothing to filter */ | |
1560 | if (!dest->filters || !source->filters) | |
1561 | return 0; | |
1562 | ||
1563 | for (i = 0; i < dest->filters; i++) { | |
1564 | filter_type = &dest->event_filters[i]; | |
1565 | arg = filter_type->filter; | |
1566 | if (arg->type != FILTER_ARG_BOOLEAN) | |
1567 | continue; | |
668fe01f SR |
1568 | if ((arg->boolean.value && type == FILTER_TRIVIAL_FALSE) || |
1569 | (!arg->boolean.value && type == FILTER_TRIVIAL_TRUE)) | |
f7d82350 SR |
1570 | continue; |
1571 | ||
1572 | event = filter_type->event; | |
1573 | ||
1574 | if (src_pevent != dest_pevent) { | |
1575 | /* do a look up */ | |
1576 | event = pevent_find_event_by_name(src_pevent, | |
1577 | event->system, | |
1578 | event->name); | |
1579 | if (!event) | |
1580 | return -1; | |
1581 | } | |
1582 | ||
1583 | str = pevent_filter_make_string(source, event->id); | |
1584 | if (!str) | |
1585 | continue; | |
1586 | ||
1587 | /* Don't bother if the filter is trivial too */ | |
1588 | if (strcmp(str, "TRUE") != 0 && strcmp(str, "FALSE") != 0) | |
1589 | filter_event(dest, event, str, NULL); | |
1590 | free(str); | |
1591 | } | |
1592 | return 0; | |
1593 | } | |
1594 | ||
1595 | /** | |
1596 | * pevent_filter_clear_trivial - clear TRUE and FALSE filters | |
1597 | * @filter: the filter to remove trivial filters from | |
1598 | * @type: remove only true, false, or both | |
1599 | * | |
1600 | * Removes filters that only contain a TRUE or FALES boolean arg. | |
7ef2e813 NK |
1601 | * |
1602 | * Returns 0 on success and -1 if there was a problem. | |
f7d82350 | 1603 | */ |
7ef2e813 | 1604 | int pevent_filter_clear_trivial(struct event_filter *filter, |
f7d82350 SR |
1605 | enum filter_trivial_type type) |
1606 | { | |
1607 | struct filter_type *filter_type; | |
1608 | int count = 0; | |
f6ced60f | 1609 | int *ids = NULL; |
f7d82350 SR |
1610 | int i; |
1611 | ||
1612 | if (!filter->filters) | |
7ef2e813 | 1613 | return 0; |
f7d82350 SR |
1614 | |
1615 | /* | |
1616 | * Two steps, first get all ids with trivial filters. | |
1617 | * then remove those ids. | |
1618 | */ | |
1619 | for (i = 0; i < filter->filters; i++) { | |
7ef2e813 NK |
1620 | int *new_ids; |
1621 | ||
f7d82350 SR |
1622 | filter_type = &filter->event_filters[i]; |
1623 | if (filter_type->filter->type != FILTER_ARG_BOOLEAN) | |
1624 | continue; | |
1625 | switch (type) { | |
1626 | case FILTER_TRIVIAL_FALSE: | |
668fe01f | 1627 | if (filter_type->filter->boolean.value) |
f7d82350 SR |
1628 | continue; |
1629 | case FILTER_TRIVIAL_TRUE: | |
668fe01f | 1630 | if (!filter_type->filter->boolean.value) |
f7d82350 SR |
1631 | continue; |
1632 | default: | |
1633 | break; | |
1634 | } | |
f6ced60f | 1635 | |
7ef2e813 NK |
1636 | new_ids = realloc(ids, sizeof(*ids) * (count + 1)); |
1637 | if (!new_ids) { | |
1638 | free(ids); | |
1639 | return -1; | |
1640 | } | |
1641 | ||
1642 | ids = new_ids; | |
f7d82350 SR |
1643 | ids[count++] = filter_type->event_id; |
1644 | } | |
1645 | ||
1646 | if (!count) | |
7ef2e813 | 1647 | return 0; |
f7d82350 SR |
1648 | |
1649 | for (i = 0; i < count; i++) | |
1650 | pevent_filter_remove_event(filter, ids[i]); | |
1651 | ||
1652 | free(ids); | |
7ef2e813 | 1653 | return 0; |
f7d82350 SR |
1654 | } |
1655 | ||
1656 | /** | |
1657 | * pevent_filter_event_has_trivial - return true event contains trivial filter | |
1658 | * @filter: the filter with the information | |
1659 | * @event_id: the id of the event to test | |
1660 | * @type: trivial type to test for (TRUE, FALSE, EITHER) | |
1661 | * | |
1662 | * Returns 1 if the event contains a matching trivial type | |
1663 | * otherwise 0. | |
1664 | */ | |
1665 | int pevent_filter_event_has_trivial(struct event_filter *filter, | |
1666 | int event_id, | |
1667 | enum filter_trivial_type type) | |
1668 | { | |
1669 | struct filter_type *filter_type; | |
1670 | ||
1671 | if (!filter->filters) | |
1672 | return 0; | |
1673 | ||
1674 | filter_type = find_filter_type(filter, event_id); | |
1675 | ||
1676 | if (!filter_type) | |
1677 | return 0; | |
1678 | ||
1679 | if (filter_type->filter->type != FILTER_ARG_BOOLEAN) | |
1680 | return 0; | |
1681 | ||
1682 | switch (type) { | |
1683 | case FILTER_TRIVIAL_FALSE: | |
668fe01f | 1684 | return !filter_type->filter->boolean.value; |
f7d82350 SR |
1685 | |
1686 | case FILTER_TRIVIAL_TRUE: | |
668fe01f | 1687 | return filter_type->filter->boolean.value; |
f7d82350 SR |
1688 | default: |
1689 | return 1; | |
1690 | } | |
1691 | } | |
1692 | ||
41e12e58 NK |
1693 | static int test_filter(struct event_format *event, struct filter_arg *arg, |
1694 | struct pevent_record *record, enum pevent_errno *err); | |
f7d82350 SR |
1695 | |
1696 | static const char * | |
1c698186 | 1697 | get_comm(struct event_format *event, struct pevent_record *record) |
f7d82350 SR |
1698 | { |
1699 | const char *comm; | |
1700 | int pid; | |
1701 | ||
1702 | pid = pevent_data_pid(event->pevent, record); | |
1703 | comm = pevent_data_comm_from_pid(event->pevent, pid); | |
1704 | return comm; | |
1705 | } | |
1706 | ||
1707 | static unsigned long long | |
1708 | get_value(struct event_format *event, | |
1c698186 | 1709 | struct format_field *field, struct pevent_record *record) |
f7d82350 SR |
1710 | { |
1711 | unsigned long long val; | |
1712 | ||
1713 | /* Handle our dummy "comm" field */ | |
1714 | if (field == &comm) { | |
1715 | const char *name; | |
1716 | ||
1717 | name = get_comm(event, record); | |
42c59cda | 1718 | return (unsigned long)name; |
f7d82350 SR |
1719 | } |
1720 | ||
1721 | pevent_read_number_field(field, record->data, &val); | |
1722 | ||
1723 | if (!(field->flags & FIELD_IS_SIGNED)) | |
1724 | return val; | |
1725 | ||
1726 | switch (field->size) { | |
1727 | case 1: | |
1728 | return (char)val; | |
1729 | case 2: | |
1730 | return (short)val; | |
1731 | case 4: | |
1732 | return (int)val; | |
1733 | case 8: | |
1734 | return (long long)val; | |
1735 | } | |
1736 | return val; | |
1737 | } | |
1738 | ||
1739 | static unsigned long long | |
41e12e58 NK |
1740 | get_arg_value(struct event_format *event, struct filter_arg *arg, |
1741 | struct pevent_record *record, enum pevent_errno *err); | |
f7d82350 SR |
1742 | |
1743 | static unsigned long long | |
41e12e58 NK |
1744 | get_exp_value(struct event_format *event, struct filter_arg *arg, |
1745 | struct pevent_record *record, enum pevent_errno *err) | |
f7d82350 SR |
1746 | { |
1747 | unsigned long long lval, rval; | |
1748 | ||
41e12e58 NK |
1749 | lval = get_arg_value(event, arg->exp.left, record, err); |
1750 | rval = get_arg_value(event, arg->exp.right, record, err); | |
1751 | ||
1752 | if (*err) { | |
1753 | /* | |
1754 | * There was an error, no need to process anymore. | |
1755 | */ | |
1756 | return 0; | |
1757 | } | |
f7d82350 SR |
1758 | |
1759 | switch (arg->exp.type) { | |
1760 | case FILTER_EXP_ADD: | |
1761 | return lval + rval; | |
1762 | ||
1763 | case FILTER_EXP_SUB: | |
1764 | return lval - rval; | |
1765 | ||
1766 | case FILTER_EXP_MUL: | |
1767 | return lval * rval; | |
1768 | ||
1769 | case FILTER_EXP_DIV: | |
1770 | return lval / rval; | |
1771 | ||
1772 | case FILTER_EXP_MOD: | |
1773 | return lval % rval; | |
1774 | ||
1775 | case FILTER_EXP_RSHIFT: | |
1776 | return lval >> rval; | |
1777 | ||
1778 | case FILTER_EXP_LSHIFT: | |
1779 | return lval << rval; | |
1780 | ||
1781 | case FILTER_EXP_AND: | |
1782 | return lval & rval; | |
1783 | ||
1784 | case FILTER_EXP_OR: | |
1785 | return lval | rval; | |
1786 | ||
1787 | case FILTER_EXP_XOR: | |
1788 | return lval ^ rval; | |
1789 | ||
1790 | case FILTER_EXP_NOT: | |
1791 | default: | |
41e12e58 NK |
1792 | if (!*err) |
1793 | *err = PEVENT_ERRNO__INVALID_EXP_TYPE; | |
f7d82350 SR |
1794 | } |
1795 | return 0; | |
1796 | } | |
1797 | ||
1798 | static unsigned long long | |
41e12e58 NK |
1799 | get_arg_value(struct event_format *event, struct filter_arg *arg, |
1800 | struct pevent_record *record, enum pevent_errno *err) | |
f7d82350 SR |
1801 | { |
1802 | switch (arg->type) { | |
1803 | case FILTER_ARG_FIELD: | |
1804 | return get_value(event, arg->field.field, record); | |
1805 | ||
1806 | case FILTER_ARG_VALUE: | |
41e12e58 NK |
1807 | if (arg->value.type != FILTER_NUMBER) { |
1808 | if (!*err) | |
1809 | *err = PEVENT_ERRNO__NOT_A_NUMBER; | |
1810 | } | |
f7d82350 SR |
1811 | return arg->value.val; |
1812 | ||
1813 | case FILTER_ARG_EXP: | |
41e12e58 | 1814 | return get_exp_value(event, arg, record, err); |
f7d82350 SR |
1815 | |
1816 | default: | |
41e12e58 NK |
1817 | if (!*err) |
1818 | *err = PEVENT_ERRNO__INVALID_ARG_TYPE; | |
f7d82350 SR |
1819 | } |
1820 | return 0; | |
1821 | } | |
1822 | ||
41e12e58 NK |
1823 | static int test_num(struct event_format *event, struct filter_arg *arg, |
1824 | struct pevent_record *record, enum pevent_errno *err) | |
f7d82350 SR |
1825 | { |
1826 | unsigned long long lval, rval; | |
1827 | ||
41e12e58 NK |
1828 | lval = get_arg_value(event, arg->num.left, record, err); |
1829 | rval = get_arg_value(event, arg->num.right, record, err); | |
1830 | ||
1831 | if (*err) { | |
1832 | /* | |
1833 | * There was an error, no need to process anymore. | |
1834 | */ | |
1835 | return 0; | |
1836 | } | |
f7d82350 SR |
1837 | |
1838 | switch (arg->num.type) { | |
1839 | case FILTER_CMP_EQ: | |
1840 | return lval == rval; | |
1841 | ||
1842 | case FILTER_CMP_NE: | |
1843 | return lval != rval; | |
1844 | ||
1845 | case FILTER_CMP_GT: | |
1846 | return lval > rval; | |
1847 | ||
1848 | case FILTER_CMP_LT: | |
1849 | return lval < rval; | |
1850 | ||
1851 | case FILTER_CMP_GE: | |
1852 | return lval >= rval; | |
1853 | ||
1854 | case FILTER_CMP_LE: | |
1855 | return lval <= rval; | |
1856 | ||
1857 | default: | |
41e12e58 NK |
1858 | if (!*err) |
1859 | *err = PEVENT_ERRNO__ILLEGAL_INTEGER_CMP; | |
f7d82350 SR |
1860 | return 0; |
1861 | } | |
1862 | } | |
1863 | ||
1c698186 | 1864 | static const char *get_field_str(struct filter_arg *arg, struct pevent_record *record) |
f7d82350 | 1865 | { |
e84c282b SR |
1866 | struct event_format *event; |
1867 | struct pevent *pevent; | |
1868 | unsigned long long addr; | |
1869 | const char *val = NULL; | |
1870 | char hex[64]; | |
f7d82350 | 1871 | |
e84c282b SR |
1872 | /* If the field is not a string convert it */ |
1873 | if (arg->str.field->flags & FIELD_IS_STRING) { | |
1874 | val = record->data + arg->str.field->offset; | |
1875 | ||
1876 | /* | |
1877 | * We need to copy the data since we can't be sure the field | |
1878 | * is null terminated. | |
1879 | */ | |
1880 | if (*(val + arg->str.field->size - 1)) { | |
1881 | /* copy it */ | |
1882 | memcpy(arg->str.buffer, val, arg->str.field->size); | |
1883 | /* the buffer is already NULL terminated */ | |
1884 | val = arg->str.buffer; | |
1885 | } | |
1886 | ||
1887 | } else { | |
1888 | event = arg->str.field->event; | |
1889 | pevent = event->pevent; | |
1890 | addr = get_value(event, arg->str.field, record); | |
1891 | ||
1892 | if (arg->str.field->flags & (FIELD_IS_POINTER | FIELD_IS_LONG)) | |
1893 | /* convert to a kernel symbol */ | |
1894 | val = pevent_find_function(pevent, addr); | |
1895 | ||
1896 | if (val == NULL) { | |
1897 | /* just use the hex of the string name */ | |
1898 | snprintf(hex, 64, "0x%llx", addr); | |
1899 | val = hex; | |
1900 | } | |
f7d82350 | 1901 | } |
e84c282b | 1902 | |
f7d82350 SR |
1903 | return val; |
1904 | } | |
1905 | ||
41e12e58 NK |
1906 | static int test_str(struct event_format *event, struct filter_arg *arg, |
1907 | struct pevent_record *record, enum pevent_errno *err) | |
f7d82350 SR |
1908 | { |
1909 | const char *val; | |
1910 | ||
1911 | if (arg->str.field == &comm) | |
1912 | val = get_comm(event, record); | |
1913 | else | |
1914 | val = get_field_str(arg, record); | |
1915 | ||
1916 | switch (arg->str.type) { | |
1917 | case FILTER_CMP_MATCH: | |
1918 | return strcmp(val, arg->str.val) == 0; | |
1919 | ||
1920 | case FILTER_CMP_NOT_MATCH: | |
1921 | return strcmp(val, arg->str.val) != 0; | |
1922 | ||
1923 | case FILTER_CMP_REGEX: | |
1924 | /* Returns zero on match */ | |
1925 | return !regexec(&arg->str.reg, val, 0, NULL, 0); | |
1926 | ||
1927 | case FILTER_CMP_NOT_REGEX: | |
1928 | return regexec(&arg->str.reg, val, 0, NULL, 0); | |
1929 | ||
1930 | default: | |
41e12e58 NK |
1931 | if (!*err) |
1932 | *err = PEVENT_ERRNO__ILLEGAL_STRING_CMP; | |
f7d82350 SR |
1933 | return 0; |
1934 | } | |
1935 | } | |
1936 | ||
41e12e58 NK |
1937 | static int test_op(struct event_format *event, struct filter_arg *arg, |
1938 | struct pevent_record *record, enum pevent_errno *err) | |
f7d82350 SR |
1939 | { |
1940 | switch (arg->op.type) { | |
1941 | case FILTER_OP_AND: | |
41e12e58 NK |
1942 | return test_filter(event, arg->op.left, record, err) && |
1943 | test_filter(event, arg->op.right, record, err); | |
f7d82350 SR |
1944 | |
1945 | case FILTER_OP_OR: | |
41e12e58 NK |
1946 | return test_filter(event, arg->op.left, record, err) || |
1947 | test_filter(event, arg->op.right, record, err); | |
f7d82350 SR |
1948 | |
1949 | case FILTER_OP_NOT: | |
41e12e58 | 1950 | return !test_filter(event, arg->op.right, record, err); |
f7d82350 SR |
1951 | |
1952 | default: | |
41e12e58 NK |
1953 | if (!*err) |
1954 | *err = PEVENT_ERRNO__INVALID_OP_TYPE; | |
f7d82350 SR |
1955 | return 0; |
1956 | } | |
1957 | } | |
1958 | ||
41e12e58 NK |
1959 | static int test_filter(struct event_format *event, struct filter_arg *arg, |
1960 | struct pevent_record *record, enum pevent_errno *err) | |
f7d82350 | 1961 | { |
41e12e58 NK |
1962 | if (*err) { |
1963 | /* | |
1964 | * There was an error, no need to process anymore. | |
1965 | */ | |
1966 | return 0; | |
1967 | } | |
1968 | ||
f7d82350 SR |
1969 | switch (arg->type) { |
1970 | case FILTER_ARG_BOOLEAN: | |
1971 | /* easy case */ | |
668fe01f | 1972 | return arg->boolean.value; |
f7d82350 SR |
1973 | |
1974 | case FILTER_ARG_OP: | |
41e12e58 | 1975 | return test_op(event, arg, record, err); |
f7d82350 SR |
1976 | |
1977 | case FILTER_ARG_NUM: | |
41e12e58 | 1978 | return test_num(event, arg, record, err); |
f7d82350 SR |
1979 | |
1980 | case FILTER_ARG_STR: | |
41e12e58 | 1981 | return test_str(event, arg, record, err); |
f7d82350 SR |
1982 | |
1983 | case FILTER_ARG_EXP: | |
1984 | case FILTER_ARG_VALUE: | |
1985 | case FILTER_ARG_FIELD: | |
1986 | /* | |
1987 | * Expressions, fields and values evaluate | |
1988 | * to true if they return non zero | |
1989 | */ | |
41e12e58 | 1990 | return !!get_arg_value(event, arg, record, err); |
f7d82350 SR |
1991 | |
1992 | default: | |
41e12e58 NK |
1993 | if (!*err) |
1994 | *err = PEVENT_ERRNO__INVALID_ARG_TYPE; | |
f7d82350 SR |
1995 | return 0; |
1996 | } | |
1997 | } | |
1998 | ||
1999 | /** | |
2000 | * pevent_event_filtered - return true if event has filter | |
2001 | * @filter: filter struct with filter information | |
2002 | * @event_id: event id to test if filter exists | |
2003 | * | |
2004 | * Returns 1 if filter found for @event_id | |
2005 | * otherwise 0; | |
2006 | */ | |
41e12e58 | 2007 | int pevent_event_filtered(struct event_filter *filter, int event_id) |
f7d82350 SR |
2008 | { |
2009 | struct filter_type *filter_type; | |
2010 | ||
2011 | if (!filter->filters) | |
2012 | return 0; | |
2013 | ||
2014 | filter_type = find_filter_type(filter, event_id); | |
2015 | ||
2016 | return filter_type ? 1 : 0; | |
2017 | } | |
2018 | ||
2019 | /** | |
2020 | * pevent_filter_match - test if a record matches a filter | |
2021 | * @filter: filter struct with filter information | |
2022 | * @record: the record to test against the filter | |
2023 | * | |
41e12e58 NK |
2024 | * Returns: match result or error code (prefixed with PEVENT_ERRNO__) |
2025 | * FILTER_MATCH - filter found for event and @record matches | |
2026 | * FILTER_MISS - filter found for event and @record does not match | |
2027 | * FILTER_NOT_FOUND - no filter found for @record's event | |
2028 | * NO_FILTER - if no filters exist | |
2029 | * otherwise - error occurred during test | |
f7d82350 | 2030 | */ |
41e12e58 NK |
2031 | enum pevent_errno pevent_filter_match(struct event_filter *filter, |
2032 | struct pevent_record *record) | |
f7d82350 SR |
2033 | { |
2034 | struct pevent *pevent = filter->pevent; | |
2035 | struct filter_type *filter_type; | |
2036 | int event_id; | |
41e12e58 NK |
2037 | int ret; |
2038 | enum pevent_errno err = 0; | |
f7d82350 | 2039 | |
bf19b82e NK |
2040 | filter_init_error_buf(filter); |
2041 | ||
f7d82350 | 2042 | if (!filter->filters) |
41e12e58 | 2043 | return PEVENT_ERRNO__NO_FILTER; |
f7d82350 SR |
2044 | |
2045 | event_id = pevent_data_type(pevent, record); | |
2046 | ||
2047 | filter_type = find_filter_type(filter, event_id); | |
f7d82350 | 2048 | if (!filter_type) |
41e12e58 NK |
2049 | return PEVENT_ERRNO__FILTER_NOT_FOUND; |
2050 | ||
2051 | ret = test_filter(filter_type->event, filter_type->filter, record, &err); | |
2052 | if (err) | |
2053 | return err; | |
f7d82350 | 2054 | |
41e12e58 | 2055 | return ret ? PEVENT_ERRNO__FILTER_MATCH : PEVENT_ERRNO__FILTER_MISS; |
f7d82350 SR |
2056 | } |
2057 | ||
2058 | static char *op_to_str(struct event_filter *filter, struct filter_arg *arg) | |
2059 | { | |
2060 | char *str = NULL; | |
2061 | char *left = NULL; | |
2062 | char *right = NULL; | |
2063 | char *op = NULL; | |
2064 | int left_val = -1; | |
2065 | int right_val = -1; | |
2066 | int val; | |
f7d82350 SR |
2067 | |
2068 | switch (arg->op.type) { | |
2069 | case FILTER_OP_AND: | |
2070 | op = "&&"; | |
2071 | /* fall through */ | |
2072 | case FILTER_OP_OR: | |
2073 | if (!op) | |
2074 | op = "||"; | |
2075 | ||
2076 | left = arg_to_str(filter, arg->op.left); | |
2077 | right = arg_to_str(filter, arg->op.right); | |
2078 | if (!left || !right) | |
2079 | break; | |
2080 | ||
2081 | /* Try to consolidate boolean values */ | |
2082 | if (strcmp(left, "TRUE") == 0) | |
2083 | left_val = 1; | |
2084 | else if (strcmp(left, "FALSE") == 0) | |
2085 | left_val = 0; | |
2086 | ||
2087 | if (strcmp(right, "TRUE") == 0) | |
2088 | right_val = 1; | |
2089 | else if (strcmp(right, "FALSE") == 0) | |
2090 | right_val = 0; | |
2091 | ||
2092 | if (left_val >= 0) { | |
2093 | if ((arg->op.type == FILTER_OP_AND && !left_val) || | |
2094 | (arg->op.type == FILTER_OP_OR && left_val)) { | |
2095 | /* Just return left value */ | |
2096 | str = left; | |
2097 | left = NULL; | |
2098 | break; | |
2099 | } | |
2100 | if (right_val >= 0) { | |
2101 | /* just evaluate this. */ | |
2102 | val = 0; | |
2103 | switch (arg->op.type) { | |
2104 | case FILTER_OP_AND: | |
2105 | val = left_val && right_val; | |
2106 | break; | |
2107 | case FILTER_OP_OR: | |
2108 | val = left_val || right_val; | |
2109 | break; | |
2110 | default: | |
2111 | break; | |
2112 | } | |
f23b24f1 | 2113 | asprintf(&str, val ? "TRUE" : "FALSE"); |
f7d82350 SR |
2114 | break; |
2115 | } | |
2116 | } | |
2117 | if (right_val >= 0) { | |
2118 | if ((arg->op.type == FILTER_OP_AND && !right_val) || | |
2119 | (arg->op.type == FILTER_OP_OR && right_val)) { | |
2120 | /* Just return right value */ | |
2121 | str = right; | |
2122 | right = NULL; | |
2123 | break; | |
2124 | } | |
2125 | /* The right value is meaningless */ | |
2126 | str = left; | |
2127 | left = NULL; | |
2128 | break; | |
2129 | } | |
2130 | ||
f23b24f1 | 2131 | asprintf(&str, "(%s) %s (%s)", left, op, right); |
f7d82350 SR |
2132 | break; |
2133 | ||
2134 | case FILTER_OP_NOT: | |
2135 | op = "!"; | |
2136 | right = arg_to_str(filter, arg->op.right); | |
2137 | if (!right) | |
2138 | break; | |
2139 | ||
2140 | /* See if we can consolidate */ | |
2141 | if (strcmp(right, "TRUE") == 0) | |
2142 | right_val = 1; | |
2143 | else if (strcmp(right, "FALSE") == 0) | |
2144 | right_val = 0; | |
2145 | if (right_val >= 0) { | |
2146 | /* just return the opposite */ | |
f23b24f1 | 2147 | asprintf(&str, right_val ? "FALSE" : "TRUE"); |
f7d82350 SR |
2148 | break; |
2149 | } | |
f23b24f1 | 2150 | asprintf(&str, "%s(%s)", op, right); |
f7d82350 SR |
2151 | break; |
2152 | ||
2153 | default: | |
2154 | /* ?? */ | |
2155 | break; | |
2156 | } | |
2157 | free(left); | |
2158 | free(right); | |
2159 | return str; | |
2160 | } | |
2161 | ||
2162 | static char *val_to_str(struct event_filter *filter, struct filter_arg *arg) | |
2163 | { | |
f23b24f1 | 2164 | char *str = NULL; |
f7d82350 | 2165 | |
f23b24f1 | 2166 | asprintf(&str, "%lld", arg->value.val); |
f7d82350 SR |
2167 | |
2168 | return str; | |
2169 | } | |
2170 | ||
2171 | static char *field_to_str(struct event_filter *filter, struct filter_arg *arg) | |
2172 | { | |
2173 | return strdup(arg->field.field->name); | |
2174 | } | |
2175 | ||
2176 | static char *exp_to_str(struct event_filter *filter, struct filter_arg *arg) | |
2177 | { | |
2178 | char *lstr; | |
2179 | char *rstr; | |
2180 | char *op; | |
0fed4834 | 2181 | char *str = NULL; |
f7d82350 SR |
2182 | |
2183 | lstr = arg_to_str(filter, arg->exp.left); | |
2184 | rstr = arg_to_str(filter, arg->exp.right); | |
0fed4834 NK |
2185 | if (!lstr || !rstr) |
2186 | goto out; | |
f7d82350 SR |
2187 | |
2188 | switch (arg->exp.type) { | |
2189 | case FILTER_EXP_ADD: | |
2190 | op = "+"; | |
2191 | break; | |
2192 | case FILTER_EXP_SUB: | |
2193 | op = "-"; | |
2194 | break; | |
2195 | case FILTER_EXP_MUL: | |
2196 | op = "*"; | |
2197 | break; | |
2198 | case FILTER_EXP_DIV: | |
2199 | op = "/"; | |
2200 | break; | |
2201 | case FILTER_EXP_MOD: | |
2202 | op = "%"; | |
2203 | break; | |
2204 | case FILTER_EXP_RSHIFT: | |
2205 | op = ">>"; | |
2206 | break; | |
2207 | case FILTER_EXP_LSHIFT: | |
2208 | op = "<<"; | |
2209 | break; | |
2210 | case FILTER_EXP_AND: | |
2211 | op = "&"; | |
2212 | break; | |
2213 | case FILTER_EXP_OR: | |
2214 | op = "|"; | |
2215 | break; | |
2216 | case FILTER_EXP_XOR: | |
2217 | op = "^"; | |
2218 | break; | |
2219 | default: | |
f23b24f1 NK |
2220 | op = "[ERROR IN EXPRESSION TYPE]"; |
2221 | break; | |
f7d82350 SR |
2222 | } |
2223 | ||
f23b24f1 | 2224 | asprintf(&str, "%s %s %s", lstr, op, rstr); |
0fed4834 | 2225 | out: |
f7d82350 SR |
2226 | free(lstr); |
2227 | free(rstr); | |
2228 | ||
2229 | return str; | |
2230 | } | |
2231 | ||
2232 | static char *num_to_str(struct event_filter *filter, struct filter_arg *arg) | |
2233 | { | |
2234 | char *lstr; | |
2235 | char *rstr; | |
2236 | char *str = NULL; | |
2237 | char *op = NULL; | |
f7d82350 SR |
2238 | |
2239 | lstr = arg_to_str(filter, arg->num.left); | |
2240 | rstr = arg_to_str(filter, arg->num.right); | |
0fed4834 NK |
2241 | if (!lstr || !rstr) |
2242 | goto out; | |
f7d82350 SR |
2243 | |
2244 | switch (arg->num.type) { | |
2245 | case FILTER_CMP_EQ: | |
2246 | op = "=="; | |
2247 | /* fall through */ | |
2248 | case FILTER_CMP_NE: | |
2249 | if (!op) | |
2250 | op = "!="; | |
2251 | /* fall through */ | |
2252 | case FILTER_CMP_GT: | |
2253 | if (!op) | |
2254 | op = ">"; | |
2255 | /* fall through */ | |
2256 | case FILTER_CMP_LT: | |
2257 | if (!op) | |
2258 | op = "<"; | |
2259 | /* fall through */ | |
2260 | case FILTER_CMP_GE: | |
2261 | if (!op) | |
2262 | op = ">="; | |
2263 | /* fall through */ | |
2264 | case FILTER_CMP_LE: | |
2265 | if (!op) | |
2266 | op = "<="; | |
2267 | ||
f23b24f1 | 2268 | asprintf(&str, "%s %s %s", lstr, op, rstr); |
f7d82350 SR |
2269 | break; |
2270 | ||
2271 | default: | |
2272 | /* ?? */ | |
2273 | break; | |
2274 | } | |
2275 | ||
0fed4834 | 2276 | out: |
f7d82350 SR |
2277 | free(lstr); |
2278 | free(rstr); | |
2279 | return str; | |
2280 | } | |
2281 | ||
2282 | static char *str_to_str(struct event_filter *filter, struct filter_arg *arg) | |
2283 | { | |
2284 | char *str = NULL; | |
2285 | char *op = NULL; | |
f7d82350 SR |
2286 | |
2287 | switch (arg->str.type) { | |
2288 | case FILTER_CMP_MATCH: | |
2289 | op = "=="; | |
2290 | /* fall through */ | |
2291 | case FILTER_CMP_NOT_MATCH: | |
2292 | if (!op) | |
2293 | op = "!="; | |
2294 | /* fall through */ | |
2295 | case FILTER_CMP_REGEX: | |
2296 | if (!op) | |
2297 | op = "=~"; | |
2298 | /* fall through */ | |
2299 | case FILTER_CMP_NOT_REGEX: | |
2300 | if (!op) | |
2301 | op = "!~"; | |
2302 | ||
f23b24f1 NK |
2303 | asprintf(&str, "%s %s \"%s\"", |
2304 | arg->str.field->name, op, arg->str.val); | |
f7d82350 SR |
2305 | break; |
2306 | ||
2307 | default: | |
2308 | /* ?? */ | |
2309 | break; | |
2310 | } | |
2311 | return str; | |
2312 | } | |
2313 | ||
2314 | static char *arg_to_str(struct event_filter *filter, struct filter_arg *arg) | |
2315 | { | |
f23b24f1 | 2316 | char *str = NULL; |
f7d82350 SR |
2317 | |
2318 | switch (arg->type) { | |
2319 | case FILTER_ARG_BOOLEAN: | |
f23b24f1 | 2320 | asprintf(&str, arg->boolean.value ? "TRUE" : "FALSE"); |
f7d82350 SR |
2321 | return str; |
2322 | ||
2323 | case FILTER_ARG_OP: | |
2324 | return op_to_str(filter, arg); | |
2325 | ||
2326 | case FILTER_ARG_NUM: | |
2327 | return num_to_str(filter, arg); | |
2328 | ||
2329 | case FILTER_ARG_STR: | |
2330 | return str_to_str(filter, arg); | |
2331 | ||
2332 | case FILTER_ARG_VALUE: | |
2333 | return val_to_str(filter, arg); | |
2334 | ||
2335 | case FILTER_ARG_FIELD: | |
2336 | return field_to_str(filter, arg); | |
2337 | ||
2338 | case FILTER_ARG_EXP: | |
2339 | return exp_to_str(filter, arg); | |
2340 | ||
2341 | default: | |
2342 | /* ?? */ | |
2343 | return NULL; | |
2344 | } | |
2345 | ||
2346 | } | |
2347 | ||
2348 | /** | |
2349 | * pevent_filter_make_string - return a string showing the filter | |
2350 | * @filter: filter struct with filter information | |
2351 | * @event_id: the event id to return the filter string with | |
2352 | * | |
2353 | * Returns a string that displays the filter contents. | |
2354 | * This string must be freed with free(str). | |
f23b24f1 | 2355 | * NULL is returned if no filter is found or allocation failed. |
f7d82350 SR |
2356 | */ |
2357 | char * | |
2358 | pevent_filter_make_string(struct event_filter *filter, int event_id) | |
2359 | { | |
2360 | struct filter_type *filter_type; | |
2361 | ||
2362 | if (!filter->filters) | |
2363 | return NULL; | |
2364 | ||
2365 | filter_type = find_filter_type(filter, event_id); | |
2366 | ||
2367 | if (!filter_type) | |
2368 | return NULL; | |
2369 | ||
2370 | return arg_to_str(filter, filter_type->filter); | |
2371 | } | |
2372 | ||
2373 | /** | |
2374 | * pevent_filter_compare - compare two filters and return if they are the same | |
2375 | * @filter1: Filter to compare with @filter2 | |
2376 | * @filter2: Filter to compare with @filter1 | |
2377 | * | |
2378 | * Returns: | |
2379 | * 1 if the two filters hold the same content. | |
2380 | * 0 if they do not. | |
2381 | */ | |
2382 | int pevent_filter_compare(struct event_filter *filter1, struct event_filter *filter2) | |
2383 | { | |
2384 | struct filter_type *filter_type1; | |
2385 | struct filter_type *filter_type2; | |
2386 | char *str1, *str2; | |
2387 | int result; | |
2388 | int i; | |
2389 | ||
2390 | /* Do the easy checks first */ | |
2391 | if (filter1->filters != filter2->filters) | |
2392 | return 0; | |
2393 | if (!filter1->filters && !filter2->filters) | |
2394 | return 1; | |
2395 | ||
2396 | /* | |
2397 | * Now take a look at each of the events to see if they have the same | |
2398 | * filters to them. | |
2399 | */ | |
2400 | for (i = 0; i < filter1->filters; i++) { | |
2401 | filter_type1 = &filter1->event_filters[i]; | |
2402 | filter_type2 = find_filter_type(filter2, filter_type1->event_id); | |
2403 | if (!filter_type2) | |
2404 | break; | |
2405 | if (filter_type1->filter->type != filter_type2->filter->type) | |
2406 | break; | |
2407 | switch (filter_type1->filter->type) { | |
2408 | case FILTER_TRIVIAL_FALSE: | |
2409 | case FILTER_TRIVIAL_TRUE: | |
2410 | /* trivial types just need the type compared */ | |
2411 | continue; | |
2412 | default: | |
2413 | break; | |
2414 | } | |
2415 | /* The best way to compare complex filters is with strings */ | |
2416 | str1 = arg_to_str(filter1, filter_type1->filter); | |
2417 | str2 = arg_to_str(filter2, filter_type2->filter); | |
0fed4834 NK |
2418 | if (str1 && str2) |
2419 | result = strcmp(str1, str2) != 0; | |
2420 | else | |
2421 | /* bail out if allocation fails */ | |
2422 | result = 1; | |
2423 | ||
f7d82350 SR |
2424 | free(str1); |
2425 | free(str2); | |
2426 | if (result) | |
2427 | break; | |
2428 | } | |
2429 | ||
2430 | if (i < filter1->filters) | |
2431 | return 0; | |
2432 | return 1; | |
2433 | } | |
2434 |