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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 | ||
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 | ||
59 | error = malloc_or_die(MAX_ERR_STR_SIZE + (len*2) + 3); | |
60 | ||
61 | if (len) { | |
62 | strcpy(error, input); | |
63 | error[len] = '\n'; | |
64 | for (i = 1; i < len && i < index; i++) | |
65 | error[len+i] = ' '; | |
66 | error[len + i] = '^'; | |
67 | error[len + i + 1] = '\n'; | |
68 | len += i+2; | |
69 | } | |
70 | ||
71 | va_start(ap, fmt); | |
72 | vsnprintf(error + len, MAX_ERR_STR_SIZE, fmt, ap); | |
73 | va_end(ap); | |
74 | ||
75 | *error_str = error; | |
76 | } | |
77 | ||
78 | static void free_token(char *token) | |
79 | { | |
80 | pevent_free_token(token); | |
81 | } | |
82 | ||
83 | static enum event_type read_token(char **tok) | |
84 | { | |
85 | enum event_type type; | |
86 | char *token = NULL; | |
87 | ||
88 | do { | |
89 | free_token(token); | |
90 | type = pevent_read_token(&token); | |
91 | } while (type == EVENT_NEWLINE || type == EVENT_SPACE); | |
92 | ||
93 | /* If token is = or ! check to see if the next char is ~ */ | |
94 | if (token && | |
95 | (strcmp(token, "=") == 0 || strcmp(token, "!") == 0) && | |
96 | pevent_peek_char() == '~') { | |
97 | /* append it */ | |
e54b34ae | 98 | *tok = malloc_or_die(3); |
f7d82350 SR |
99 | sprintf(*tok, "%c%c", *token, '~'); |
100 | free_token(token); | |
101 | /* Now remove the '~' from the buffer */ | |
102 | pevent_read_token(&token); | |
103 | free_token(token); | |
104 | } else | |
105 | *tok = token; | |
106 | ||
107 | return type; | |
108 | } | |
109 | ||
110 | static int filter_cmp(const void *a, const void *b) | |
111 | { | |
112 | const struct filter_type *ea = a; | |
113 | const struct filter_type *eb = b; | |
114 | ||
115 | if (ea->event_id < eb->event_id) | |
116 | return -1; | |
117 | ||
118 | if (ea->event_id > eb->event_id) | |
119 | return 1; | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | static struct filter_type * | |
125 | find_filter_type(struct event_filter *filter, int id) | |
126 | { | |
127 | struct filter_type *filter_type; | |
128 | struct filter_type key; | |
129 | ||
130 | key.event_id = id; | |
131 | ||
132 | filter_type = bsearch(&key, filter->event_filters, | |
133 | filter->filters, | |
134 | sizeof(*filter->event_filters), | |
135 | filter_cmp); | |
136 | ||
137 | return filter_type; | |
138 | } | |
139 | ||
140 | static struct filter_type * | |
141 | add_filter_type(struct event_filter *filter, int id) | |
142 | { | |
143 | struct filter_type *filter_type; | |
144 | int i; | |
145 | ||
146 | filter_type = find_filter_type(filter, id); | |
147 | if (filter_type) | |
148 | return filter_type; | |
149 | ||
f6ced60f NK |
150 | filter->event_filters = realloc(filter->event_filters, |
151 | sizeof(*filter->event_filters) * | |
152 | (filter->filters + 1)); | |
153 | if (!filter->event_filters) | |
154 | die("Could not allocate filter"); | |
f7d82350 SR |
155 | |
156 | for (i = 0; i < filter->filters; i++) { | |
157 | if (filter->event_filters[i].event_id > id) | |
158 | break; | |
159 | } | |
160 | ||
161 | if (i < filter->filters) | |
162 | memmove(&filter->event_filters[i+1], | |
163 | &filter->event_filters[i], | |
164 | sizeof(*filter->event_filters) * | |
165 | (filter->filters - i)); | |
166 | ||
167 | filter_type = &filter->event_filters[i]; | |
168 | filter_type->event_id = id; | |
169 | filter_type->event = pevent_find_event(filter->pevent, id); | |
170 | filter_type->filter = NULL; | |
171 | ||
172 | filter->filters++; | |
173 | ||
174 | return filter_type; | |
175 | } | |
176 | ||
177 | /** | |
178 | * pevent_filter_alloc - create a new event filter | |
179 | * @pevent: The pevent that this filter is associated with | |
180 | */ | |
181 | struct event_filter *pevent_filter_alloc(struct pevent *pevent) | |
182 | { | |
183 | struct event_filter *filter; | |
184 | ||
185 | filter = malloc_or_die(sizeof(*filter)); | |
186 | memset(filter, 0, sizeof(*filter)); | |
187 | filter->pevent = pevent; | |
188 | pevent_ref(pevent); | |
189 | ||
190 | return filter; | |
191 | } | |
192 | ||
193 | static struct filter_arg *allocate_arg(void) | |
194 | { | |
195 | struct filter_arg *arg; | |
196 | ||
197 | arg = malloc_or_die(sizeof(*arg)); | |
198 | memset(arg, 0, sizeof(*arg)); | |
199 | ||
200 | return arg; | |
201 | } | |
202 | ||
203 | static void free_arg(struct filter_arg *arg) | |
204 | { | |
205 | if (!arg) | |
206 | return; | |
207 | ||
208 | switch (arg->type) { | |
209 | case FILTER_ARG_NONE: | |
210 | case FILTER_ARG_BOOLEAN: | |
743df75f SR |
211 | break; |
212 | ||
f7d82350 | 213 | case FILTER_ARG_NUM: |
743df75f SR |
214 | free_arg(arg->num.left); |
215 | free_arg(arg->num.right); | |
216 | break; | |
217 | ||
218 | case FILTER_ARG_EXP: | |
219 | free_arg(arg->exp.left); | |
220 | free_arg(arg->exp.right); | |
f7d82350 SR |
221 | break; |
222 | ||
223 | case FILTER_ARG_STR: | |
224 | free(arg->str.val); | |
225 | regfree(&arg->str.reg); | |
226 | free(arg->str.buffer); | |
227 | break; | |
228 | ||
743df75f SR |
229 | case FILTER_ARG_VALUE: |
230 | if (arg->value.type == FILTER_STRING || | |
231 | arg->value.type == FILTER_CHAR) | |
232 | free(arg->value.str); | |
233 | break; | |
234 | ||
f7d82350 SR |
235 | case FILTER_ARG_OP: |
236 | free_arg(arg->op.left); | |
237 | free_arg(arg->op.right); | |
238 | default: | |
239 | break; | |
240 | } | |
241 | ||
242 | free(arg); | |
243 | } | |
244 | ||
245 | static void add_event(struct event_list **events, | |
246 | struct event_format *event) | |
247 | { | |
248 | struct event_list *list; | |
249 | ||
250 | list = malloc_or_die(sizeof(*list)); | |
251 | list->next = *events; | |
252 | *events = list; | |
253 | list->event = event; | |
254 | } | |
255 | ||
256 | static int event_match(struct event_format *event, | |
257 | regex_t *sreg, regex_t *ereg) | |
258 | { | |
259 | if (sreg) { | |
260 | return !regexec(sreg, event->system, 0, NULL, 0) && | |
261 | !regexec(ereg, event->name, 0, NULL, 0); | |
262 | } | |
263 | ||
264 | return !regexec(ereg, event->system, 0, NULL, 0) || | |
265 | !regexec(ereg, event->name, 0, NULL, 0); | |
266 | } | |
267 | ||
268 | static int | |
269 | find_event(struct pevent *pevent, struct event_list **events, | |
270 | char *sys_name, char *event_name) | |
271 | { | |
272 | struct event_format *event; | |
273 | regex_t ereg; | |
274 | regex_t sreg; | |
275 | int match = 0; | |
276 | char *reg; | |
277 | int ret; | |
278 | int i; | |
279 | ||
280 | if (!event_name) { | |
281 | /* if no name is given, then swap sys and name */ | |
282 | event_name = sys_name; | |
283 | sys_name = NULL; | |
284 | } | |
285 | ||
286 | reg = malloc_or_die(strlen(event_name) + 3); | |
287 | sprintf(reg, "^%s$", event_name); | |
288 | ||
289 | ret = regcomp(&ereg, reg, REG_ICASE|REG_NOSUB); | |
290 | free(reg); | |
291 | ||
292 | if (ret) | |
293 | return -1; | |
294 | ||
295 | if (sys_name) { | |
296 | reg = malloc_or_die(strlen(sys_name) + 3); | |
297 | sprintf(reg, "^%s$", sys_name); | |
298 | ret = regcomp(&sreg, reg, REG_ICASE|REG_NOSUB); | |
299 | free(reg); | |
300 | if (ret) { | |
301 | regfree(&ereg); | |
302 | return -1; | |
303 | } | |
304 | } | |
305 | ||
306 | for (i = 0; i < pevent->nr_events; i++) { | |
307 | event = pevent->events[i]; | |
308 | if (event_match(event, sys_name ? &sreg : NULL, &ereg)) { | |
309 | match = 1; | |
310 | add_event(events, event); | |
311 | } | |
312 | } | |
313 | ||
314 | regfree(&ereg); | |
315 | if (sys_name) | |
316 | regfree(&sreg); | |
317 | ||
318 | if (!match) | |
319 | return -1; | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | static void free_events(struct event_list *events) | |
325 | { | |
326 | struct event_list *event; | |
327 | ||
328 | while (events) { | |
329 | event = events; | |
330 | events = events->next; | |
331 | free(event); | |
332 | } | |
333 | } | |
334 | ||
335 | static struct filter_arg * | |
eaec12d7 NK |
336 | create_arg_item(struct event_format *event, const char *token, |
337 | enum event_type type, char **error_str) | |
f7d82350 SR |
338 | { |
339 | struct format_field *field; | |
340 | struct filter_arg *arg; | |
341 | ||
342 | arg = allocate_arg(); | |
343 | ||
344 | switch (type) { | |
345 | ||
346 | case EVENT_SQUOTE: | |
347 | case EVENT_DQUOTE: | |
348 | arg->type = FILTER_ARG_VALUE; | |
349 | arg->value.type = | |
350 | type == EVENT_DQUOTE ? FILTER_STRING : FILTER_CHAR; | |
351 | arg->value.str = strdup(token); | |
352 | if (!arg->value.str) | |
353 | die("malloc string"); | |
354 | break; | |
355 | case EVENT_ITEM: | |
356 | /* if it is a number, then convert it */ | |
357 | if (isdigit(token[0])) { | |
358 | arg->type = FILTER_ARG_VALUE; | |
359 | arg->value.type = FILTER_NUMBER; | |
360 | arg->value.val = strtoull(token, NULL, 0); | |
361 | break; | |
362 | } | |
363 | /* Consider this a field */ | |
364 | field = pevent_find_any_field(event, token); | |
365 | if (!field) { | |
366 | if (strcmp(token, COMM) != 0) { | |
367 | /* not a field, Make it false */ | |
368 | arg->type = FILTER_ARG_BOOLEAN; | |
668fe01f | 369 | arg->boolean.value = FILTER_FALSE; |
f7d82350 SR |
370 | break; |
371 | } | |
372 | /* If token is 'COMM' then it is special */ | |
373 | field = &comm; | |
374 | } | |
375 | arg->type = FILTER_ARG_FIELD; | |
376 | arg->field.field = field; | |
377 | break; | |
378 | default: | |
379 | free_arg(arg); | |
380 | show_error(error_str, "expected a value but found %s", | |
381 | token); | |
382 | return NULL; | |
383 | } | |
384 | return arg; | |
385 | } | |
386 | ||
387 | static struct filter_arg * | |
388 | create_arg_op(enum filter_op_type btype) | |
389 | { | |
390 | struct filter_arg *arg; | |
391 | ||
392 | arg = allocate_arg(); | |
393 | arg->type = FILTER_ARG_OP; | |
394 | arg->op.type = btype; | |
395 | ||
396 | return arg; | |
397 | } | |
398 | ||
399 | static struct filter_arg * | |
400 | create_arg_exp(enum filter_exp_type etype) | |
401 | { | |
402 | struct filter_arg *arg; | |
403 | ||
404 | arg = allocate_arg(); | |
405 | arg->type = FILTER_ARG_EXP; | |
406 | arg->op.type = etype; | |
407 | ||
408 | return arg; | |
409 | } | |
410 | ||
411 | static struct filter_arg * | |
412 | create_arg_cmp(enum filter_exp_type etype) | |
413 | { | |
414 | struct filter_arg *arg; | |
415 | ||
416 | arg = allocate_arg(); | |
417 | /* Use NUM and change if necessary */ | |
418 | arg->type = FILTER_ARG_NUM; | |
419 | arg->op.type = etype; | |
420 | ||
421 | return arg; | |
422 | } | |
423 | ||
424 | static int add_right(struct filter_arg *op, struct filter_arg *arg, | |
425 | char **error_str) | |
426 | { | |
427 | struct filter_arg *left; | |
428 | char *str; | |
429 | int op_type; | |
430 | int ret; | |
431 | ||
432 | switch (op->type) { | |
433 | case FILTER_ARG_EXP: | |
434 | if (op->exp.right) | |
435 | goto out_fail; | |
436 | op->exp.right = arg; | |
437 | break; | |
438 | ||
439 | case FILTER_ARG_OP: | |
440 | if (op->op.right) | |
441 | goto out_fail; | |
442 | op->op.right = arg; | |
443 | break; | |
444 | ||
445 | case FILTER_ARG_NUM: | |
446 | if (op->op.right) | |
447 | goto out_fail; | |
448 | /* | |
449 | * The arg must be num, str, or field | |
450 | */ | |
451 | switch (arg->type) { | |
452 | case FILTER_ARG_VALUE: | |
453 | case FILTER_ARG_FIELD: | |
454 | break; | |
455 | default: | |
456 | show_error(error_str, | |
457 | "Illegal rvalue"); | |
458 | return -1; | |
459 | } | |
460 | ||
461 | /* | |
462 | * Depending on the type, we may need to | |
463 | * convert this to a string or regex. | |
464 | */ | |
465 | switch (arg->value.type) { | |
466 | case FILTER_CHAR: | |
467 | /* | |
468 | * A char should be converted to number if | |
469 | * the string is 1 byte, and the compare | |
470 | * is not a REGEX. | |
471 | */ | |
472 | if (strlen(arg->value.str) == 1 && | |
473 | op->num.type != FILTER_CMP_REGEX && | |
474 | op->num.type != FILTER_CMP_NOT_REGEX) { | |
475 | arg->value.type = FILTER_NUMBER; | |
476 | goto do_int; | |
477 | } | |
478 | /* fall through */ | |
479 | case FILTER_STRING: | |
480 | ||
481 | /* convert op to a string arg */ | |
482 | op_type = op->num.type; | |
483 | left = op->num.left; | |
484 | str = arg->value.str; | |
485 | ||
486 | /* reset the op for the new field */ | |
487 | memset(op, 0, sizeof(*op)); | |
488 | ||
489 | /* | |
490 | * If left arg was a field not found then | |
491 | * NULL the entire op. | |
492 | */ | |
493 | if (left->type == FILTER_ARG_BOOLEAN) { | |
494 | free_arg(left); | |
495 | free_arg(arg); | |
496 | op->type = FILTER_ARG_BOOLEAN; | |
668fe01f | 497 | op->boolean.value = FILTER_FALSE; |
f7d82350 SR |
498 | break; |
499 | } | |
500 | ||
501 | /* Left arg must be a field */ | |
502 | if (left->type != FILTER_ARG_FIELD) { | |
503 | show_error(error_str, | |
504 | "Illegal lvalue for string comparison"); | |
505 | return -1; | |
506 | } | |
507 | ||
508 | /* Make sure this is a valid string compare */ | |
509 | switch (op_type) { | |
510 | case FILTER_CMP_EQ: | |
511 | op_type = FILTER_CMP_MATCH; | |
512 | break; | |
513 | case FILTER_CMP_NE: | |
514 | op_type = FILTER_CMP_NOT_MATCH; | |
515 | break; | |
516 | ||
517 | case FILTER_CMP_REGEX: | |
518 | case FILTER_CMP_NOT_REGEX: | |
519 | ret = regcomp(&op->str.reg, str, REG_ICASE|REG_NOSUB); | |
520 | if (ret) { | |
521 | show_error(error_str, | |
522 | "RegEx '%s' did not compute", | |
523 | str); | |
524 | return -1; | |
525 | } | |
526 | break; | |
527 | default: | |
528 | show_error(error_str, | |
529 | "Illegal comparison for string"); | |
530 | return -1; | |
531 | } | |
532 | ||
533 | op->type = FILTER_ARG_STR; | |
534 | op->str.type = op_type; | |
535 | op->str.field = left->field.field; | |
536 | op->str.val = strdup(str); | |
537 | if (!op->str.val) | |
538 | die("malloc string"); | |
539 | /* | |
540 | * Need a buffer to copy data for tests | |
541 | */ | |
542 | op->str.buffer = malloc_or_die(op->str.field->size + 1); | |
543 | /* Null terminate this buffer */ | |
544 | op->str.buffer[op->str.field->size] = 0; | |
545 | ||
546 | /* We no longer have left or right args */ | |
547 | free_arg(arg); | |
548 | free_arg(left); | |
549 | ||
550 | break; | |
551 | ||
552 | case FILTER_NUMBER: | |
553 | ||
554 | do_int: | |
555 | switch (op->num.type) { | |
556 | case FILTER_CMP_REGEX: | |
557 | case FILTER_CMP_NOT_REGEX: | |
558 | show_error(error_str, | |
559 | "Op not allowed with integers"); | |
560 | return -1; | |
561 | ||
562 | default: | |
563 | break; | |
564 | } | |
565 | ||
566 | /* numeric compare */ | |
567 | op->num.right = arg; | |
568 | break; | |
569 | default: | |
570 | goto out_fail; | |
571 | } | |
572 | break; | |
573 | default: | |
574 | goto out_fail; | |
575 | } | |
576 | ||
577 | return 0; | |
578 | ||
579 | out_fail: | |
580 | show_error(error_str, | |
581 | "Syntax error"); | |
582 | return -1; | |
583 | } | |
584 | ||
585 | static struct filter_arg * | |
586 | rotate_op_right(struct filter_arg *a, struct filter_arg *b) | |
587 | { | |
588 | struct filter_arg *arg; | |
589 | ||
590 | arg = a->op.right; | |
591 | a->op.right = b; | |
592 | return arg; | |
593 | } | |
594 | ||
595 | static int add_left(struct filter_arg *op, struct filter_arg *arg) | |
596 | { | |
597 | switch (op->type) { | |
598 | case FILTER_ARG_EXP: | |
599 | if (arg->type == FILTER_ARG_OP) | |
600 | arg = rotate_op_right(arg, op); | |
601 | op->exp.left = arg; | |
602 | break; | |
603 | ||
604 | case FILTER_ARG_OP: | |
605 | op->op.left = arg; | |
606 | break; | |
607 | case FILTER_ARG_NUM: | |
608 | if (arg->type == FILTER_ARG_OP) | |
609 | arg = rotate_op_right(arg, op); | |
610 | ||
611 | /* left arg of compares must be a field */ | |
612 | if (arg->type != FILTER_ARG_FIELD && | |
613 | arg->type != FILTER_ARG_BOOLEAN) | |
614 | return -1; | |
615 | op->num.left = arg; | |
616 | break; | |
617 | default: | |
618 | return -1; | |
619 | } | |
620 | return 0; | |
621 | } | |
622 | ||
623 | enum op_type { | |
624 | OP_NONE, | |
625 | OP_BOOL, | |
626 | OP_NOT, | |
627 | OP_EXP, | |
628 | OP_CMP, | |
629 | }; | |
630 | ||
631 | static enum op_type process_op(const char *token, | |
632 | enum filter_op_type *btype, | |
633 | enum filter_cmp_type *ctype, | |
634 | enum filter_exp_type *etype) | |
635 | { | |
636 | *btype = FILTER_OP_NOT; | |
637 | *etype = FILTER_EXP_NONE; | |
638 | *ctype = FILTER_CMP_NONE; | |
639 | ||
640 | if (strcmp(token, "&&") == 0) | |
641 | *btype = FILTER_OP_AND; | |
642 | else if (strcmp(token, "||") == 0) | |
643 | *btype = FILTER_OP_OR; | |
644 | else if (strcmp(token, "!") == 0) | |
645 | return OP_NOT; | |
646 | ||
647 | if (*btype != FILTER_OP_NOT) | |
648 | return OP_BOOL; | |
649 | ||
650 | /* Check for value expressions */ | |
651 | if (strcmp(token, "+") == 0) { | |
652 | *etype = FILTER_EXP_ADD; | |
653 | } else if (strcmp(token, "-") == 0) { | |
654 | *etype = FILTER_EXP_SUB; | |
655 | } else if (strcmp(token, "*") == 0) { | |
656 | *etype = FILTER_EXP_MUL; | |
657 | } else if (strcmp(token, "/") == 0) { | |
658 | *etype = FILTER_EXP_DIV; | |
659 | } else if (strcmp(token, "%") == 0) { | |
660 | *etype = FILTER_EXP_MOD; | |
661 | } else if (strcmp(token, ">>") == 0) { | |
662 | *etype = FILTER_EXP_RSHIFT; | |
663 | } else if (strcmp(token, "<<") == 0) { | |
664 | *etype = FILTER_EXP_LSHIFT; | |
665 | } else if (strcmp(token, "&") == 0) { | |
666 | *etype = FILTER_EXP_AND; | |
667 | } else if (strcmp(token, "|") == 0) { | |
668 | *etype = FILTER_EXP_OR; | |
669 | } else if (strcmp(token, "^") == 0) { | |
670 | *etype = FILTER_EXP_XOR; | |
671 | } else if (strcmp(token, "~") == 0) | |
672 | *etype = FILTER_EXP_NOT; | |
673 | ||
674 | if (*etype != FILTER_EXP_NONE) | |
675 | return OP_EXP; | |
676 | ||
677 | /* Check for compares */ | |
678 | if (strcmp(token, "==") == 0) | |
679 | *ctype = FILTER_CMP_EQ; | |
680 | else if (strcmp(token, "!=") == 0) | |
681 | *ctype = FILTER_CMP_NE; | |
682 | else if (strcmp(token, "<") == 0) | |
683 | *ctype = FILTER_CMP_LT; | |
684 | else if (strcmp(token, ">") == 0) | |
685 | *ctype = FILTER_CMP_GT; | |
686 | else if (strcmp(token, "<=") == 0) | |
687 | *ctype = FILTER_CMP_LE; | |
688 | else if (strcmp(token, ">=") == 0) | |
689 | *ctype = FILTER_CMP_GE; | |
690 | else if (strcmp(token, "=~") == 0) | |
691 | *ctype = FILTER_CMP_REGEX; | |
692 | else if (strcmp(token, "!~") == 0) | |
693 | *ctype = FILTER_CMP_NOT_REGEX; | |
694 | else | |
695 | return OP_NONE; | |
696 | ||
697 | return OP_CMP; | |
698 | } | |
699 | ||
700 | static int check_op_done(struct filter_arg *arg) | |
701 | { | |
702 | switch (arg->type) { | |
703 | case FILTER_ARG_EXP: | |
704 | return arg->exp.right != NULL; | |
705 | ||
706 | case FILTER_ARG_OP: | |
707 | return arg->op.right != NULL; | |
708 | ||
709 | case FILTER_ARG_NUM: | |
710 | return arg->num.right != NULL; | |
711 | ||
712 | case FILTER_ARG_STR: | |
713 | /* A string conversion is always done */ | |
714 | return 1; | |
715 | ||
716 | case FILTER_ARG_BOOLEAN: | |
717 | /* field not found, is ok */ | |
718 | return 1; | |
719 | ||
720 | default: | |
721 | return 0; | |
722 | } | |
723 | } | |
724 | ||
725 | enum filter_vals { | |
726 | FILTER_VAL_NORM, | |
727 | FILTER_VAL_FALSE, | |
728 | FILTER_VAL_TRUE, | |
729 | }; | |
730 | ||
731 | void reparent_op_arg(struct filter_arg *parent, struct filter_arg *old_child, | |
732 | struct filter_arg *arg) | |
733 | { | |
734 | struct filter_arg *other_child; | |
735 | struct filter_arg **ptr; | |
736 | ||
737 | if (parent->type != FILTER_ARG_OP && | |
738 | arg->type != FILTER_ARG_OP) | |
739 | die("can not reparent other than OP"); | |
740 | ||
741 | /* Get the sibling */ | |
742 | if (old_child->op.right == arg) { | |
743 | ptr = &old_child->op.right; | |
744 | other_child = old_child->op.left; | |
745 | } else if (old_child->op.left == arg) { | |
746 | ptr = &old_child->op.left; | |
747 | other_child = old_child->op.right; | |
748 | } else | |
749 | die("Error in reparent op, find other child"); | |
750 | ||
751 | /* Detach arg from old_child */ | |
752 | *ptr = NULL; | |
753 | ||
754 | /* Check for root */ | |
755 | if (parent == old_child) { | |
756 | free_arg(other_child); | |
757 | *parent = *arg; | |
758 | /* Free arg without recussion */ | |
759 | free(arg); | |
760 | return; | |
761 | } | |
762 | ||
763 | if (parent->op.right == old_child) | |
764 | ptr = &parent->op.right; | |
765 | else if (parent->op.left == old_child) | |
766 | ptr = &parent->op.left; | |
767 | else | |
768 | die("Error in reparent op"); | |
769 | *ptr = arg; | |
770 | ||
771 | free_arg(old_child); | |
772 | } | |
773 | ||
774 | enum filter_vals test_arg(struct filter_arg *parent, struct filter_arg *arg) | |
775 | { | |
776 | enum filter_vals lval, rval; | |
777 | ||
778 | switch (arg->type) { | |
779 | ||
780 | /* bad case */ | |
781 | case FILTER_ARG_BOOLEAN: | |
668fe01f | 782 | return FILTER_VAL_FALSE + arg->boolean.value; |
f7d82350 SR |
783 | |
784 | /* good cases: */ | |
785 | case FILTER_ARG_STR: | |
786 | case FILTER_ARG_VALUE: | |
787 | case FILTER_ARG_FIELD: | |
788 | return FILTER_VAL_NORM; | |
789 | ||
790 | case FILTER_ARG_EXP: | |
791 | lval = test_arg(arg, arg->exp.left); | |
792 | if (lval != FILTER_VAL_NORM) | |
793 | return lval; | |
794 | rval = test_arg(arg, arg->exp.right); | |
795 | if (rval != FILTER_VAL_NORM) | |
796 | return rval; | |
797 | return FILTER_VAL_NORM; | |
798 | ||
799 | case FILTER_ARG_NUM: | |
800 | lval = test_arg(arg, arg->num.left); | |
801 | if (lval != FILTER_VAL_NORM) | |
802 | return lval; | |
803 | rval = test_arg(arg, arg->num.right); | |
804 | if (rval != FILTER_VAL_NORM) | |
805 | return rval; | |
806 | return FILTER_VAL_NORM; | |
807 | ||
808 | case FILTER_ARG_OP: | |
809 | if (arg->op.type != FILTER_OP_NOT) { | |
810 | lval = test_arg(arg, arg->op.left); | |
811 | switch (lval) { | |
812 | case FILTER_VAL_NORM: | |
813 | break; | |
814 | case FILTER_VAL_TRUE: | |
815 | if (arg->op.type == FILTER_OP_OR) | |
816 | return FILTER_VAL_TRUE; | |
817 | rval = test_arg(arg, arg->op.right); | |
818 | if (rval != FILTER_VAL_NORM) | |
819 | return rval; | |
820 | ||
821 | reparent_op_arg(parent, arg, arg->op.right); | |
822 | return FILTER_VAL_NORM; | |
823 | ||
824 | case FILTER_VAL_FALSE: | |
825 | if (arg->op.type == FILTER_OP_AND) | |
826 | return FILTER_VAL_FALSE; | |
827 | rval = test_arg(arg, arg->op.right); | |
828 | if (rval != FILTER_VAL_NORM) | |
829 | return rval; | |
830 | ||
831 | reparent_op_arg(parent, arg, arg->op.right); | |
832 | return FILTER_VAL_NORM; | |
833 | } | |
834 | } | |
835 | ||
836 | rval = test_arg(arg, arg->op.right); | |
837 | switch (rval) { | |
838 | case FILTER_VAL_NORM: | |
839 | break; | |
840 | case FILTER_VAL_TRUE: | |
841 | if (arg->op.type == FILTER_OP_OR) | |
842 | return FILTER_VAL_TRUE; | |
843 | if (arg->op.type == FILTER_OP_NOT) | |
844 | return FILTER_VAL_FALSE; | |
845 | ||
846 | reparent_op_arg(parent, arg, arg->op.left); | |
847 | return FILTER_VAL_NORM; | |
848 | ||
849 | case FILTER_VAL_FALSE: | |
850 | if (arg->op.type == FILTER_OP_AND) | |
851 | return FILTER_VAL_FALSE; | |
852 | if (arg->op.type == FILTER_OP_NOT) | |
853 | return FILTER_VAL_TRUE; | |
854 | ||
855 | reparent_op_arg(parent, arg, arg->op.left); | |
856 | return FILTER_VAL_NORM; | |
857 | } | |
858 | ||
859 | return FILTER_VAL_NORM; | |
860 | default: | |
861 | die("bad arg in filter tree"); | |
862 | } | |
863 | return FILTER_VAL_NORM; | |
864 | } | |
865 | ||
866 | /* Remove any unknown event fields */ | |
867 | static struct filter_arg *collapse_tree(struct filter_arg *arg) | |
868 | { | |
869 | enum filter_vals ret; | |
870 | ||
871 | ret = test_arg(arg, arg); | |
872 | switch (ret) { | |
873 | case FILTER_VAL_NORM: | |
874 | return arg; | |
875 | ||
876 | case FILTER_VAL_TRUE: | |
877 | case FILTER_VAL_FALSE: | |
878 | free_arg(arg); | |
879 | arg = allocate_arg(); | |
880 | arg->type = FILTER_ARG_BOOLEAN; | |
668fe01f | 881 | arg->boolean.value = ret == FILTER_VAL_TRUE; |
f7d82350 SR |
882 | } |
883 | ||
884 | return arg; | |
885 | } | |
886 | ||
887 | static int | |
888 | process_filter(struct event_format *event, struct filter_arg **parg, | |
889 | char **error_str, int not) | |
890 | { | |
891 | enum event_type type; | |
892 | char *token = NULL; | |
893 | struct filter_arg *current_op = NULL; | |
894 | struct filter_arg *current_exp = NULL; | |
895 | struct filter_arg *left_item = NULL; | |
896 | struct filter_arg *arg = NULL; | |
897 | enum op_type op_type; | |
898 | enum filter_op_type btype; | |
899 | enum filter_exp_type etype; | |
900 | enum filter_cmp_type ctype; | |
901 | int ret; | |
902 | ||
903 | *parg = NULL; | |
904 | ||
905 | do { | |
906 | free(token); | |
907 | type = read_token(&token); | |
908 | switch (type) { | |
909 | case EVENT_SQUOTE: | |
910 | case EVENT_DQUOTE: | |
911 | case EVENT_ITEM: | |
912 | arg = create_arg_item(event, token, type, error_str); | |
913 | if (!arg) | |
914 | goto fail; | |
915 | if (!left_item) | |
916 | left_item = arg; | |
917 | else if (current_exp) { | |
918 | ret = add_right(current_exp, arg, error_str); | |
919 | if (ret < 0) | |
920 | goto fail; | |
921 | left_item = NULL; | |
922 | /* Not's only one one expression */ | |
923 | if (not) { | |
924 | arg = NULL; | |
925 | if (current_op) | |
926 | goto fail_print; | |
927 | free(token); | |
928 | *parg = current_exp; | |
929 | return 0; | |
930 | } | |
931 | } else | |
932 | goto fail_print; | |
933 | arg = NULL; | |
934 | break; | |
935 | ||
936 | case EVENT_DELIM: | |
937 | if (*token == ',') { | |
938 | show_error(error_str, | |
939 | "Illegal token ','"); | |
940 | goto fail; | |
941 | } | |
942 | ||
943 | if (*token == '(') { | |
944 | if (left_item) { | |
945 | show_error(error_str, | |
946 | "Open paren can not come after item"); | |
947 | goto fail; | |
948 | } | |
949 | if (current_exp) { | |
950 | show_error(error_str, | |
951 | "Open paren can not come after expression"); | |
952 | goto fail; | |
953 | } | |
954 | ||
955 | ret = process_filter(event, &arg, error_str, 0); | |
956 | if (ret != 1) { | |
957 | if (ret == 0) | |
958 | show_error(error_str, | |
959 | "Unbalanced number of '('"); | |
960 | goto fail; | |
961 | } | |
962 | ret = 0; | |
963 | ||
964 | /* A not wants just one expression */ | |
965 | if (not) { | |
966 | if (current_op) | |
967 | goto fail_print; | |
968 | *parg = arg; | |
969 | return 0; | |
970 | } | |
971 | ||
972 | if (current_op) | |
973 | ret = add_right(current_op, arg, error_str); | |
974 | else | |
975 | current_exp = arg; | |
976 | ||
977 | if (ret < 0) | |
978 | goto fail; | |
979 | ||
980 | } else { /* ')' */ | |
981 | if (!current_op && !current_exp) | |
982 | goto fail_print; | |
983 | ||
984 | /* Make sure everything is finished at this level */ | |
985 | if (current_exp && !check_op_done(current_exp)) | |
986 | goto fail_print; | |
987 | if (current_op && !check_op_done(current_op)) | |
988 | goto fail_print; | |
989 | ||
990 | if (current_op) | |
991 | *parg = current_op; | |
992 | else | |
993 | *parg = current_exp; | |
994 | return 1; | |
995 | } | |
996 | break; | |
997 | ||
998 | case EVENT_OP: | |
999 | op_type = process_op(token, &btype, &ctype, &etype); | |
1000 | ||
1001 | /* All expect a left arg except for NOT */ | |
1002 | switch (op_type) { | |
1003 | case OP_BOOL: | |
1004 | /* Logic ops need a left expression */ | |
1005 | if (!current_exp && !current_op) | |
1006 | goto fail_print; | |
1007 | /* fall through */ | |
1008 | case OP_NOT: | |
1009 | /* logic only processes ops and exp */ | |
1010 | if (left_item) | |
1011 | goto fail_print; | |
1012 | break; | |
1013 | case OP_EXP: | |
1014 | case OP_CMP: | |
1015 | if (!left_item) | |
1016 | goto fail_print; | |
1017 | break; | |
1018 | case OP_NONE: | |
1019 | show_error(error_str, | |
1020 | "Unknown op token %s", token); | |
1021 | goto fail; | |
1022 | } | |
1023 | ||
1024 | ret = 0; | |
1025 | switch (op_type) { | |
1026 | case OP_BOOL: | |
1027 | arg = create_arg_op(btype); | |
1028 | if (current_op) | |
1029 | ret = add_left(arg, current_op); | |
1030 | else | |
1031 | ret = add_left(arg, current_exp); | |
1032 | current_op = arg; | |
1033 | current_exp = NULL; | |
1034 | break; | |
1035 | ||
1036 | case OP_NOT: | |
1037 | arg = create_arg_op(btype); | |
1038 | if (current_op) | |
1039 | ret = add_right(current_op, arg, error_str); | |
1040 | if (ret < 0) | |
1041 | goto fail; | |
1042 | current_exp = arg; | |
1043 | ret = process_filter(event, &arg, error_str, 1); | |
1044 | if (ret < 0) | |
1045 | goto fail; | |
1046 | ret = add_right(current_exp, arg, error_str); | |
1047 | if (ret < 0) | |
1048 | goto fail; | |
1049 | break; | |
1050 | ||
1051 | case OP_EXP: | |
1052 | case OP_CMP: | |
1053 | if (op_type == OP_EXP) | |
1054 | arg = create_arg_exp(etype); | |
1055 | else | |
1056 | arg = create_arg_cmp(ctype); | |
1057 | ||
1058 | if (current_op) | |
1059 | ret = add_right(current_op, arg, error_str); | |
1060 | if (ret < 0) | |
1061 | goto fail; | |
1062 | ret = add_left(arg, left_item); | |
1063 | if (ret < 0) { | |
1064 | arg = NULL; | |
1065 | goto fail_print; | |
1066 | } | |
1067 | current_exp = arg; | |
1068 | break; | |
1069 | default: | |
1070 | break; | |
1071 | } | |
1072 | arg = NULL; | |
1073 | if (ret < 0) | |
1074 | goto fail_print; | |
1075 | break; | |
1076 | case EVENT_NONE: | |
1077 | break; | |
1078 | default: | |
1079 | goto fail_print; | |
1080 | } | |
1081 | } while (type != EVENT_NONE); | |
1082 | ||
1083 | if (!current_op && !current_exp) | |
1084 | goto fail_print; | |
1085 | ||
1086 | if (!current_op) | |
1087 | current_op = current_exp; | |
1088 | ||
1089 | current_op = collapse_tree(current_op); | |
1090 | ||
1091 | *parg = current_op; | |
1092 | ||
1093 | return 0; | |
1094 | ||
1095 | fail_print: | |
1096 | show_error(error_str, "Syntax error"); | |
1097 | fail: | |
1098 | free_arg(current_op); | |
1099 | free_arg(current_exp); | |
1100 | free_arg(arg); | |
1101 | free(token); | |
1102 | return -1; | |
1103 | } | |
1104 | ||
1105 | static int | |
1106 | process_event(struct event_format *event, const char *filter_str, | |
1107 | struct filter_arg **parg, char **error_str) | |
1108 | { | |
1109 | int ret; | |
1110 | ||
1111 | pevent_buffer_init(filter_str, strlen(filter_str)); | |
1112 | ||
1113 | ret = process_filter(event, parg, error_str, 0); | |
1114 | if (ret == 1) { | |
1115 | show_error(error_str, | |
1116 | "Unbalanced number of ')'"); | |
1117 | return -1; | |
1118 | } | |
1119 | if (ret < 0) | |
1120 | return ret; | |
1121 | ||
1122 | /* If parg is NULL, then make it into FALSE */ | |
1123 | if (!*parg) { | |
1124 | *parg = allocate_arg(); | |
1125 | (*parg)->type = FILTER_ARG_BOOLEAN; | |
668fe01f | 1126 | (*parg)->boolean.value = FILTER_FALSE; |
f7d82350 SR |
1127 | } |
1128 | ||
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | static int filter_event(struct event_filter *filter, | |
1133 | struct event_format *event, | |
1134 | const char *filter_str, char **error_str) | |
1135 | { | |
1136 | struct filter_type *filter_type; | |
1137 | struct filter_arg *arg; | |
1138 | int ret; | |
1139 | ||
1140 | if (filter_str) { | |
1141 | ret = process_event(event, filter_str, &arg, error_str); | |
1142 | if (ret < 0) | |
1143 | return ret; | |
1144 | ||
1145 | } else { | |
1146 | /* just add a TRUE arg */ | |
1147 | arg = allocate_arg(); | |
1148 | arg->type = FILTER_ARG_BOOLEAN; | |
668fe01f | 1149 | arg->boolean.value = FILTER_TRUE; |
f7d82350 SR |
1150 | } |
1151 | ||
1152 | filter_type = add_filter_type(filter, event->id); | |
1153 | if (filter_type->filter) | |
1154 | free_arg(filter_type->filter); | |
1155 | filter_type->filter = arg; | |
1156 | ||
1157 | return 0; | |
1158 | } | |
1159 | ||
1160 | /** | |
1161 | * pevent_filter_add_filter_str - add a new filter | |
1162 | * @filter: the event filter to add to | |
1163 | * @filter_str: the filter string that contains the filter | |
1164 | * @error_str: string containing reason for failed filter | |
1165 | * | |
1166 | * Returns 0 if the filter was successfully added | |
1167 | * -1 if there was an error. | |
1168 | * | |
1169 | * On error, if @error_str points to a string pointer, | |
1170 | * it is set to the reason that the filter failed. | |
1171 | * This string must be freed with "free". | |
1172 | */ | |
1173 | int pevent_filter_add_filter_str(struct event_filter *filter, | |
1174 | const char *filter_str, | |
1175 | char **error_str) | |
1176 | { | |
1177 | struct pevent *pevent = filter->pevent; | |
1178 | struct event_list *event; | |
1179 | struct event_list *events = NULL; | |
1180 | const char *filter_start; | |
1181 | const char *next_event; | |
1182 | char *this_event; | |
1183 | char *event_name = NULL; | |
1184 | char *sys_name = NULL; | |
1185 | char *sp; | |
1186 | int rtn = 0; | |
1187 | int len; | |
1188 | int ret; | |
1189 | ||
1190 | /* clear buffer to reset show error */ | |
1191 | pevent_buffer_init("", 0); | |
1192 | ||
1193 | if (error_str) | |
1194 | *error_str = NULL; | |
1195 | ||
1196 | filter_start = strchr(filter_str, ':'); | |
1197 | if (filter_start) | |
1198 | len = filter_start - filter_str; | |
1199 | else | |
1200 | len = strlen(filter_str); | |
1201 | ||
1202 | ||
1203 | do { | |
1204 | next_event = strchr(filter_str, ','); | |
1205 | if (next_event && | |
1206 | (!filter_start || next_event < filter_start)) | |
1207 | len = next_event - filter_str; | |
1208 | else if (filter_start) | |
1209 | len = filter_start - filter_str; | |
1210 | else | |
1211 | len = strlen(filter_str); | |
1212 | ||
1213 | this_event = malloc_or_die(len + 1); | |
1214 | memcpy(this_event, filter_str, len); | |
1215 | this_event[len] = 0; | |
1216 | ||
1217 | if (next_event) | |
1218 | next_event++; | |
1219 | ||
1220 | filter_str = next_event; | |
1221 | ||
1222 | sys_name = strtok_r(this_event, "/", &sp); | |
1223 | event_name = strtok_r(NULL, "/", &sp); | |
1224 | ||
1225 | if (!sys_name) { | |
1226 | show_error(error_str, "No filter found"); | |
1227 | /* This can only happen when events is NULL, but still */ | |
1228 | free_events(events); | |
1229 | free(this_event); | |
1230 | return -1; | |
1231 | } | |
1232 | ||
1233 | /* Find this event */ | |
1234 | ret = find_event(pevent, &events, strim(sys_name), strim(event_name)); | |
1235 | if (ret < 0) { | |
1236 | if (event_name) | |
1237 | show_error(error_str, | |
1238 | "No event found under '%s.%s'", | |
1239 | sys_name, event_name); | |
1240 | else | |
1241 | show_error(error_str, | |
1242 | "No event found under '%s'", | |
1243 | sys_name); | |
1244 | free_events(events); | |
1245 | free(this_event); | |
1246 | return -1; | |
1247 | } | |
1248 | free(this_event); | |
1249 | } while (filter_str); | |
1250 | ||
1251 | /* Skip the ':' */ | |
1252 | if (filter_start) | |
1253 | filter_start++; | |
1254 | ||
1255 | /* filter starts here */ | |
1256 | for (event = events; event; event = event->next) { | |
1257 | ret = filter_event(filter, event->event, filter_start, | |
1258 | error_str); | |
1259 | /* Failures are returned if a parse error happened */ | |
1260 | if (ret < 0) | |
1261 | rtn = ret; | |
1262 | ||
1263 | if (ret >= 0 && pevent->test_filters) { | |
1264 | char *test; | |
1265 | test = pevent_filter_make_string(filter, event->event->id); | |
1266 | printf(" '%s: %s'\n", event->event->name, test); | |
1267 | free(test); | |
1268 | } | |
1269 | } | |
1270 | ||
1271 | free_events(events); | |
1272 | ||
1273 | if (rtn >= 0 && pevent->test_filters) | |
1274 | exit(0); | |
1275 | ||
1276 | return rtn; | |
1277 | } | |
1278 | ||
1279 | static void free_filter_type(struct filter_type *filter_type) | |
1280 | { | |
1281 | free_arg(filter_type->filter); | |
1282 | } | |
1283 | ||
1284 | /** | |
1285 | * pevent_filter_remove_event - remove a filter for an event | |
1286 | * @filter: the event filter to remove from | |
1287 | * @event_id: the event to remove a filter for | |
1288 | * | |
1289 | * Removes the filter saved for an event defined by @event_id | |
1290 | * from the @filter. | |
1291 | * | |
1292 | * Returns 1: if an event was removed | |
1293 | * 0: if the event was not found | |
1294 | */ | |
1295 | int pevent_filter_remove_event(struct event_filter *filter, | |
1296 | int event_id) | |
1297 | { | |
1298 | struct filter_type *filter_type; | |
1299 | unsigned long len; | |
1300 | ||
1301 | if (!filter->filters) | |
1302 | return 0; | |
1303 | ||
1304 | filter_type = find_filter_type(filter, event_id); | |
1305 | ||
1306 | if (!filter_type) | |
1307 | return 0; | |
1308 | ||
1309 | free_filter_type(filter_type); | |
1310 | ||
1311 | /* The filter_type points into the event_filters array */ | |
1312 | len = (unsigned long)(filter->event_filters + filter->filters) - | |
1313 | (unsigned long)(filter_type + 1); | |
1314 | ||
1315 | memmove(filter_type, filter_type + 1, len); | |
1316 | filter->filters--; | |
1317 | ||
1318 | memset(&filter->event_filters[filter->filters], 0, | |
1319 | sizeof(*filter_type)); | |
1320 | ||
1321 | return 1; | |
1322 | } | |
1323 | ||
1324 | /** | |
1325 | * pevent_filter_reset - clear all filters in a filter | |
1326 | * @filter: the event filter to reset | |
1327 | * | |
1328 | * Removes all filters from a filter and resets it. | |
1329 | */ | |
1330 | void pevent_filter_reset(struct event_filter *filter) | |
1331 | { | |
1332 | int i; | |
1333 | ||
1334 | for (i = 0; i < filter->filters; i++) | |
1335 | free_filter_type(&filter->event_filters[i]); | |
1336 | ||
1337 | free(filter->event_filters); | |
1338 | filter->filters = 0; | |
1339 | filter->event_filters = NULL; | |
1340 | } | |
1341 | ||
1342 | void pevent_filter_free(struct event_filter *filter) | |
1343 | { | |
1344 | pevent_unref(filter->pevent); | |
1345 | ||
1346 | pevent_filter_reset(filter); | |
1347 | ||
1348 | free(filter); | |
1349 | } | |
1350 | ||
1351 | static char *arg_to_str(struct event_filter *filter, struct filter_arg *arg); | |
1352 | ||
1353 | static int copy_filter_type(struct event_filter *filter, | |
1354 | struct event_filter *source, | |
1355 | struct filter_type *filter_type) | |
1356 | { | |
1357 | struct filter_arg *arg; | |
1358 | struct event_format *event; | |
1359 | const char *sys; | |
1360 | const char *name; | |
1361 | char *str; | |
1362 | ||
1363 | /* Can't assume that the pevent's are the same */ | |
1364 | sys = filter_type->event->system; | |
1365 | name = filter_type->event->name; | |
1366 | event = pevent_find_event_by_name(filter->pevent, sys, name); | |
1367 | if (!event) | |
1368 | return -1; | |
1369 | ||
1370 | str = arg_to_str(source, filter_type->filter); | |
1371 | if (!str) | |
1372 | return -1; | |
1373 | ||
1374 | if (strcmp(str, "TRUE") == 0 || strcmp(str, "FALSE") == 0) { | |
1375 | /* Add trivial event */ | |
1376 | arg = allocate_arg(); | |
1377 | arg->type = FILTER_ARG_BOOLEAN; | |
1378 | if (strcmp(str, "TRUE") == 0) | |
668fe01f | 1379 | arg->boolean.value = 1; |
f7d82350 | 1380 | else |
668fe01f | 1381 | arg->boolean.value = 0; |
f7d82350 SR |
1382 | |
1383 | filter_type = add_filter_type(filter, event->id); | |
1384 | filter_type->filter = arg; | |
1385 | ||
1386 | free(str); | |
1387 | return 0; | |
1388 | } | |
1389 | ||
1390 | filter_event(filter, event, str, NULL); | |
1391 | free(str); | |
1392 | ||
1393 | return 0; | |
1394 | } | |
1395 | ||
1396 | /** | |
1397 | * pevent_filter_copy - copy a filter using another filter | |
1398 | * @dest - the filter to copy to | |
1399 | * @source - the filter to copy from | |
1400 | * | |
1401 | * Returns 0 on success and -1 if not all filters were copied | |
1402 | */ | |
1403 | int pevent_filter_copy(struct event_filter *dest, struct event_filter *source) | |
1404 | { | |
1405 | int ret = 0; | |
1406 | int i; | |
1407 | ||
1408 | pevent_filter_reset(dest); | |
1409 | ||
1410 | for (i = 0; i < source->filters; i++) { | |
1411 | if (copy_filter_type(dest, source, &source->event_filters[i])) | |
1412 | ret = -1; | |
1413 | } | |
1414 | return ret; | |
1415 | } | |
1416 | ||
1417 | ||
1418 | /** | |
1419 | * pevent_update_trivial - update the trivial filters with the given filter | |
1420 | * @dest - the filter to update | |
1421 | * @source - the filter as the source of the update | |
1422 | * @type - the type of trivial filter to update. | |
1423 | * | |
1424 | * Scan dest for trivial events matching @type to replace with the source. | |
1425 | * | |
1426 | * Returns 0 on success and -1 if there was a problem updating, but | |
1427 | * events may have still been updated on error. | |
1428 | */ | |
1429 | int pevent_update_trivial(struct event_filter *dest, struct event_filter *source, | |
1430 | enum filter_trivial_type type) | |
1431 | { | |
1432 | struct pevent *src_pevent; | |
1433 | struct pevent *dest_pevent; | |
1434 | struct event_format *event; | |
1435 | struct filter_type *filter_type; | |
1436 | struct filter_arg *arg; | |
1437 | char *str; | |
1438 | int i; | |
1439 | ||
1440 | src_pevent = source->pevent; | |
1441 | dest_pevent = dest->pevent; | |
1442 | ||
1443 | /* Do nothing if either of the filters has nothing to filter */ | |
1444 | if (!dest->filters || !source->filters) | |
1445 | return 0; | |
1446 | ||
1447 | for (i = 0; i < dest->filters; i++) { | |
1448 | filter_type = &dest->event_filters[i]; | |
1449 | arg = filter_type->filter; | |
1450 | if (arg->type != FILTER_ARG_BOOLEAN) | |
1451 | continue; | |
668fe01f SR |
1452 | if ((arg->boolean.value && type == FILTER_TRIVIAL_FALSE) || |
1453 | (!arg->boolean.value && type == FILTER_TRIVIAL_TRUE)) | |
f7d82350 SR |
1454 | continue; |
1455 | ||
1456 | event = filter_type->event; | |
1457 | ||
1458 | if (src_pevent != dest_pevent) { | |
1459 | /* do a look up */ | |
1460 | event = pevent_find_event_by_name(src_pevent, | |
1461 | event->system, | |
1462 | event->name); | |
1463 | if (!event) | |
1464 | return -1; | |
1465 | } | |
1466 | ||
1467 | str = pevent_filter_make_string(source, event->id); | |
1468 | if (!str) | |
1469 | continue; | |
1470 | ||
1471 | /* Don't bother if the filter is trivial too */ | |
1472 | if (strcmp(str, "TRUE") != 0 && strcmp(str, "FALSE") != 0) | |
1473 | filter_event(dest, event, str, NULL); | |
1474 | free(str); | |
1475 | } | |
1476 | return 0; | |
1477 | } | |
1478 | ||
1479 | /** | |
1480 | * pevent_filter_clear_trivial - clear TRUE and FALSE filters | |
1481 | * @filter: the filter to remove trivial filters from | |
1482 | * @type: remove only true, false, or both | |
1483 | * | |
1484 | * Removes filters that only contain a TRUE or FALES boolean arg. | |
1485 | */ | |
1486 | void pevent_filter_clear_trivial(struct event_filter *filter, | |
1487 | enum filter_trivial_type type) | |
1488 | { | |
1489 | struct filter_type *filter_type; | |
1490 | int count = 0; | |
f6ced60f | 1491 | int *ids = NULL; |
f7d82350 SR |
1492 | int i; |
1493 | ||
1494 | if (!filter->filters) | |
1495 | return; | |
1496 | ||
1497 | /* | |
1498 | * Two steps, first get all ids with trivial filters. | |
1499 | * then remove those ids. | |
1500 | */ | |
1501 | for (i = 0; i < filter->filters; i++) { | |
1502 | filter_type = &filter->event_filters[i]; | |
1503 | if (filter_type->filter->type != FILTER_ARG_BOOLEAN) | |
1504 | continue; | |
1505 | switch (type) { | |
1506 | case FILTER_TRIVIAL_FALSE: | |
668fe01f | 1507 | if (filter_type->filter->boolean.value) |
f7d82350 SR |
1508 | continue; |
1509 | case FILTER_TRIVIAL_TRUE: | |
668fe01f | 1510 | if (!filter_type->filter->boolean.value) |
f7d82350 SR |
1511 | continue; |
1512 | default: | |
1513 | break; | |
1514 | } | |
f6ced60f NK |
1515 | |
1516 | ids = realloc(ids, sizeof(*ids) * (count + 1)); | |
f7d82350 SR |
1517 | if (!ids) |
1518 | die("Can't allocate ids"); | |
1519 | ids[count++] = filter_type->event_id; | |
1520 | } | |
1521 | ||
1522 | if (!count) | |
1523 | return; | |
1524 | ||
1525 | for (i = 0; i < count; i++) | |
1526 | pevent_filter_remove_event(filter, ids[i]); | |
1527 | ||
1528 | free(ids); | |
1529 | } | |
1530 | ||
1531 | /** | |
1532 | * pevent_filter_event_has_trivial - return true event contains trivial filter | |
1533 | * @filter: the filter with the information | |
1534 | * @event_id: the id of the event to test | |
1535 | * @type: trivial type to test for (TRUE, FALSE, EITHER) | |
1536 | * | |
1537 | * Returns 1 if the event contains a matching trivial type | |
1538 | * otherwise 0. | |
1539 | */ | |
1540 | int pevent_filter_event_has_trivial(struct event_filter *filter, | |
1541 | int event_id, | |
1542 | enum filter_trivial_type type) | |
1543 | { | |
1544 | struct filter_type *filter_type; | |
1545 | ||
1546 | if (!filter->filters) | |
1547 | return 0; | |
1548 | ||
1549 | filter_type = find_filter_type(filter, event_id); | |
1550 | ||
1551 | if (!filter_type) | |
1552 | return 0; | |
1553 | ||
1554 | if (filter_type->filter->type != FILTER_ARG_BOOLEAN) | |
1555 | return 0; | |
1556 | ||
1557 | switch (type) { | |
1558 | case FILTER_TRIVIAL_FALSE: | |
668fe01f | 1559 | return !filter_type->filter->boolean.value; |
f7d82350 SR |
1560 | |
1561 | case FILTER_TRIVIAL_TRUE: | |
668fe01f | 1562 | return filter_type->filter->boolean.value; |
f7d82350 SR |
1563 | default: |
1564 | return 1; | |
1565 | } | |
1566 | } | |
1567 | ||
1568 | static int test_filter(struct event_format *event, | |
1c698186 | 1569 | struct filter_arg *arg, struct pevent_record *record); |
f7d82350 SR |
1570 | |
1571 | static const char * | |
1c698186 | 1572 | get_comm(struct event_format *event, struct pevent_record *record) |
f7d82350 SR |
1573 | { |
1574 | const char *comm; | |
1575 | int pid; | |
1576 | ||
1577 | pid = pevent_data_pid(event->pevent, record); | |
1578 | comm = pevent_data_comm_from_pid(event->pevent, pid); | |
1579 | return comm; | |
1580 | } | |
1581 | ||
1582 | static unsigned long long | |
1583 | get_value(struct event_format *event, | |
1c698186 | 1584 | struct format_field *field, struct pevent_record *record) |
f7d82350 SR |
1585 | { |
1586 | unsigned long long val; | |
1587 | ||
1588 | /* Handle our dummy "comm" field */ | |
1589 | if (field == &comm) { | |
1590 | const char *name; | |
1591 | ||
1592 | name = get_comm(event, record); | |
42c59cda | 1593 | return (unsigned long)name; |
f7d82350 SR |
1594 | } |
1595 | ||
1596 | pevent_read_number_field(field, record->data, &val); | |
1597 | ||
1598 | if (!(field->flags & FIELD_IS_SIGNED)) | |
1599 | return val; | |
1600 | ||
1601 | switch (field->size) { | |
1602 | case 1: | |
1603 | return (char)val; | |
1604 | case 2: | |
1605 | return (short)val; | |
1606 | case 4: | |
1607 | return (int)val; | |
1608 | case 8: | |
1609 | return (long long)val; | |
1610 | } | |
1611 | return val; | |
1612 | } | |
1613 | ||
1614 | static unsigned long long | |
1c698186 | 1615 | get_arg_value(struct event_format *event, struct filter_arg *arg, struct pevent_record *record); |
f7d82350 SR |
1616 | |
1617 | static unsigned long long | |
1c698186 | 1618 | get_exp_value(struct event_format *event, struct filter_arg *arg, struct pevent_record *record) |
f7d82350 SR |
1619 | { |
1620 | unsigned long long lval, rval; | |
1621 | ||
1622 | lval = get_arg_value(event, arg->exp.left, record); | |
1623 | rval = get_arg_value(event, arg->exp.right, record); | |
1624 | ||
1625 | switch (arg->exp.type) { | |
1626 | case FILTER_EXP_ADD: | |
1627 | return lval + rval; | |
1628 | ||
1629 | case FILTER_EXP_SUB: | |
1630 | return lval - rval; | |
1631 | ||
1632 | case FILTER_EXP_MUL: | |
1633 | return lval * rval; | |
1634 | ||
1635 | case FILTER_EXP_DIV: | |
1636 | return lval / rval; | |
1637 | ||
1638 | case FILTER_EXP_MOD: | |
1639 | return lval % rval; | |
1640 | ||
1641 | case FILTER_EXP_RSHIFT: | |
1642 | return lval >> rval; | |
1643 | ||
1644 | case FILTER_EXP_LSHIFT: | |
1645 | return lval << rval; | |
1646 | ||
1647 | case FILTER_EXP_AND: | |
1648 | return lval & rval; | |
1649 | ||
1650 | case FILTER_EXP_OR: | |
1651 | return lval | rval; | |
1652 | ||
1653 | case FILTER_EXP_XOR: | |
1654 | return lval ^ rval; | |
1655 | ||
1656 | case FILTER_EXP_NOT: | |
1657 | default: | |
1658 | die("error in exp"); | |
1659 | } | |
1660 | return 0; | |
1661 | } | |
1662 | ||
1663 | static unsigned long long | |
1c698186 | 1664 | get_arg_value(struct event_format *event, struct filter_arg *arg, struct pevent_record *record) |
f7d82350 SR |
1665 | { |
1666 | switch (arg->type) { | |
1667 | case FILTER_ARG_FIELD: | |
1668 | return get_value(event, arg->field.field, record); | |
1669 | ||
1670 | case FILTER_ARG_VALUE: | |
1671 | if (arg->value.type != FILTER_NUMBER) | |
1672 | die("must have number field!"); | |
1673 | return arg->value.val; | |
1674 | ||
1675 | case FILTER_ARG_EXP: | |
1676 | return get_exp_value(event, arg, record); | |
1677 | ||
1678 | default: | |
1679 | die("oops in filter"); | |
1680 | } | |
1681 | return 0; | |
1682 | } | |
1683 | ||
1684 | static int test_num(struct event_format *event, | |
1c698186 | 1685 | struct filter_arg *arg, struct pevent_record *record) |
f7d82350 SR |
1686 | { |
1687 | unsigned long long lval, rval; | |
1688 | ||
1689 | lval = get_arg_value(event, arg->num.left, record); | |
1690 | rval = get_arg_value(event, arg->num.right, record); | |
1691 | ||
1692 | switch (arg->num.type) { | |
1693 | case FILTER_CMP_EQ: | |
1694 | return lval == rval; | |
1695 | ||
1696 | case FILTER_CMP_NE: | |
1697 | return lval != rval; | |
1698 | ||
1699 | case FILTER_CMP_GT: | |
1700 | return lval > rval; | |
1701 | ||
1702 | case FILTER_CMP_LT: | |
1703 | return lval < rval; | |
1704 | ||
1705 | case FILTER_CMP_GE: | |
1706 | return lval >= rval; | |
1707 | ||
1708 | case FILTER_CMP_LE: | |
1709 | return lval <= rval; | |
1710 | ||
1711 | default: | |
1712 | /* ?? */ | |
1713 | return 0; | |
1714 | } | |
1715 | } | |
1716 | ||
1c698186 | 1717 | static const char *get_field_str(struct filter_arg *arg, struct pevent_record *record) |
f7d82350 | 1718 | { |
e84c282b SR |
1719 | struct event_format *event; |
1720 | struct pevent *pevent; | |
1721 | unsigned long long addr; | |
1722 | const char *val = NULL; | |
1723 | char hex[64]; | |
f7d82350 | 1724 | |
e84c282b SR |
1725 | /* If the field is not a string convert it */ |
1726 | if (arg->str.field->flags & FIELD_IS_STRING) { | |
1727 | val = record->data + arg->str.field->offset; | |
1728 | ||
1729 | /* | |
1730 | * We need to copy the data since we can't be sure the field | |
1731 | * is null terminated. | |
1732 | */ | |
1733 | if (*(val + arg->str.field->size - 1)) { | |
1734 | /* copy it */ | |
1735 | memcpy(arg->str.buffer, val, arg->str.field->size); | |
1736 | /* the buffer is already NULL terminated */ | |
1737 | val = arg->str.buffer; | |
1738 | } | |
1739 | ||
1740 | } else { | |
1741 | event = arg->str.field->event; | |
1742 | pevent = event->pevent; | |
1743 | addr = get_value(event, arg->str.field, record); | |
1744 | ||
1745 | if (arg->str.field->flags & (FIELD_IS_POINTER | FIELD_IS_LONG)) | |
1746 | /* convert to a kernel symbol */ | |
1747 | val = pevent_find_function(pevent, addr); | |
1748 | ||
1749 | if (val == NULL) { | |
1750 | /* just use the hex of the string name */ | |
1751 | snprintf(hex, 64, "0x%llx", addr); | |
1752 | val = hex; | |
1753 | } | |
f7d82350 | 1754 | } |
e84c282b | 1755 | |
f7d82350 SR |
1756 | return val; |
1757 | } | |
1758 | ||
1759 | static int test_str(struct event_format *event, | |
1c698186 | 1760 | struct filter_arg *arg, struct pevent_record *record) |
f7d82350 SR |
1761 | { |
1762 | const char *val; | |
1763 | ||
1764 | if (arg->str.field == &comm) | |
1765 | val = get_comm(event, record); | |
1766 | else | |
1767 | val = get_field_str(arg, record); | |
1768 | ||
1769 | switch (arg->str.type) { | |
1770 | case FILTER_CMP_MATCH: | |
1771 | return strcmp(val, arg->str.val) == 0; | |
1772 | ||
1773 | case FILTER_CMP_NOT_MATCH: | |
1774 | return strcmp(val, arg->str.val) != 0; | |
1775 | ||
1776 | case FILTER_CMP_REGEX: | |
1777 | /* Returns zero on match */ | |
1778 | return !regexec(&arg->str.reg, val, 0, NULL, 0); | |
1779 | ||
1780 | case FILTER_CMP_NOT_REGEX: | |
1781 | return regexec(&arg->str.reg, val, 0, NULL, 0); | |
1782 | ||
1783 | default: | |
1784 | /* ?? */ | |
1785 | return 0; | |
1786 | } | |
1787 | } | |
1788 | ||
1789 | static int test_op(struct event_format *event, | |
1c698186 | 1790 | struct filter_arg *arg, struct pevent_record *record) |
f7d82350 SR |
1791 | { |
1792 | switch (arg->op.type) { | |
1793 | case FILTER_OP_AND: | |
1794 | return test_filter(event, arg->op.left, record) && | |
1795 | test_filter(event, arg->op.right, record); | |
1796 | ||
1797 | case FILTER_OP_OR: | |
1798 | return test_filter(event, arg->op.left, record) || | |
1799 | test_filter(event, arg->op.right, record); | |
1800 | ||
1801 | case FILTER_OP_NOT: | |
1802 | return !test_filter(event, arg->op.right, record); | |
1803 | ||
1804 | default: | |
1805 | /* ?? */ | |
1806 | return 0; | |
1807 | } | |
1808 | } | |
1809 | ||
1810 | static int test_filter(struct event_format *event, | |
1c698186 | 1811 | struct filter_arg *arg, struct pevent_record *record) |
f7d82350 SR |
1812 | { |
1813 | switch (arg->type) { | |
1814 | case FILTER_ARG_BOOLEAN: | |
1815 | /* easy case */ | |
668fe01f | 1816 | return arg->boolean.value; |
f7d82350 SR |
1817 | |
1818 | case FILTER_ARG_OP: | |
1819 | return test_op(event, arg, record); | |
1820 | ||
1821 | case FILTER_ARG_NUM: | |
1822 | return test_num(event, arg, record); | |
1823 | ||
1824 | case FILTER_ARG_STR: | |
1825 | return test_str(event, arg, record); | |
1826 | ||
1827 | case FILTER_ARG_EXP: | |
1828 | case FILTER_ARG_VALUE: | |
1829 | case FILTER_ARG_FIELD: | |
1830 | /* | |
1831 | * Expressions, fields and values evaluate | |
1832 | * to true if they return non zero | |
1833 | */ | |
1834 | return !!get_arg_value(event, arg, record); | |
1835 | ||
1836 | default: | |
1837 | die("oops!"); | |
1838 | /* ?? */ | |
1839 | return 0; | |
1840 | } | |
1841 | } | |
1842 | ||
1843 | /** | |
1844 | * pevent_event_filtered - return true if event has filter | |
1845 | * @filter: filter struct with filter information | |
1846 | * @event_id: event id to test if filter exists | |
1847 | * | |
1848 | * Returns 1 if filter found for @event_id | |
1849 | * otherwise 0; | |
1850 | */ | |
1851 | int pevent_event_filtered(struct event_filter *filter, | |
1852 | int event_id) | |
1853 | { | |
1854 | struct filter_type *filter_type; | |
1855 | ||
1856 | if (!filter->filters) | |
1857 | return 0; | |
1858 | ||
1859 | filter_type = find_filter_type(filter, event_id); | |
1860 | ||
1861 | return filter_type ? 1 : 0; | |
1862 | } | |
1863 | ||
1864 | /** | |
1865 | * pevent_filter_match - test if a record matches a filter | |
1866 | * @filter: filter struct with filter information | |
1867 | * @record: the record to test against the filter | |
1868 | * | |
1869 | * Returns: | |
1870 | * 1 - filter found for event and @record matches | |
1871 | * 0 - filter found for event and @record does not match | |
1872 | * -1 - no filter found for @record's event | |
1873 | * -2 - if no filters exist | |
1874 | */ | |
1875 | int pevent_filter_match(struct event_filter *filter, | |
1c698186 | 1876 | struct pevent_record *record) |
f7d82350 SR |
1877 | { |
1878 | struct pevent *pevent = filter->pevent; | |
1879 | struct filter_type *filter_type; | |
1880 | int event_id; | |
1881 | ||
1882 | if (!filter->filters) | |
1883 | return FILTER_NONE; | |
1884 | ||
1885 | event_id = pevent_data_type(pevent, record); | |
1886 | ||
1887 | filter_type = find_filter_type(filter, event_id); | |
1888 | ||
1889 | if (!filter_type) | |
1890 | return FILTER_NOEXIST; | |
1891 | ||
1892 | return test_filter(filter_type->event, filter_type->filter, record) ? | |
1893 | FILTER_MATCH : FILTER_MISS; | |
1894 | } | |
1895 | ||
1896 | static char *op_to_str(struct event_filter *filter, struct filter_arg *arg) | |
1897 | { | |
1898 | char *str = NULL; | |
1899 | char *left = NULL; | |
1900 | char *right = NULL; | |
1901 | char *op = NULL; | |
1902 | int left_val = -1; | |
1903 | int right_val = -1; | |
1904 | int val; | |
1905 | int len; | |
1906 | ||
1907 | switch (arg->op.type) { | |
1908 | case FILTER_OP_AND: | |
1909 | op = "&&"; | |
1910 | /* fall through */ | |
1911 | case FILTER_OP_OR: | |
1912 | if (!op) | |
1913 | op = "||"; | |
1914 | ||
1915 | left = arg_to_str(filter, arg->op.left); | |
1916 | right = arg_to_str(filter, arg->op.right); | |
1917 | if (!left || !right) | |
1918 | break; | |
1919 | ||
1920 | /* Try to consolidate boolean values */ | |
1921 | if (strcmp(left, "TRUE") == 0) | |
1922 | left_val = 1; | |
1923 | else if (strcmp(left, "FALSE") == 0) | |
1924 | left_val = 0; | |
1925 | ||
1926 | if (strcmp(right, "TRUE") == 0) | |
1927 | right_val = 1; | |
1928 | else if (strcmp(right, "FALSE") == 0) | |
1929 | right_val = 0; | |
1930 | ||
1931 | if (left_val >= 0) { | |
1932 | if ((arg->op.type == FILTER_OP_AND && !left_val) || | |
1933 | (arg->op.type == FILTER_OP_OR && left_val)) { | |
1934 | /* Just return left value */ | |
1935 | str = left; | |
1936 | left = NULL; | |
1937 | break; | |
1938 | } | |
1939 | if (right_val >= 0) { | |
1940 | /* just evaluate this. */ | |
1941 | val = 0; | |
1942 | switch (arg->op.type) { | |
1943 | case FILTER_OP_AND: | |
1944 | val = left_val && right_val; | |
1945 | break; | |
1946 | case FILTER_OP_OR: | |
1947 | val = left_val || right_val; | |
1948 | break; | |
1949 | default: | |
1950 | break; | |
1951 | } | |
1952 | str = malloc_or_die(6); | |
1953 | if (val) | |
1954 | strcpy(str, "TRUE"); | |
1955 | else | |
1956 | strcpy(str, "FALSE"); | |
1957 | break; | |
1958 | } | |
1959 | } | |
1960 | if (right_val >= 0) { | |
1961 | if ((arg->op.type == FILTER_OP_AND && !right_val) || | |
1962 | (arg->op.type == FILTER_OP_OR && right_val)) { | |
1963 | /* Just return right value */ | |
1964 | str = right; | |
1965 | right = NULL; | |
1966 | break; | |
1967 | } | |
1968 | /* The right value is meaningless */ | |
1969 | str = left; | |
1970 | left = NULL; | |
1971 | break; | |
1972 | } | |
1973 | ||
1974 | len = strlen(left) + strlen(right) + strlen(op) + 10; | |
1975 | str = malloc_or_die(len); | |
1976 | snprintf(str, len, "(%s) %s (%s)", | |
1977 | left, op, right); | |
1978 | break; | |
1979 | ||
1980 | case FILTER_OP_NOT: | |
1981 | op = "!"; | |
1982 | right = arg_to_str(filter, arg->op.right); | |
1983 | if (!right) | |
1984 | break; | |
1985 | ||
1986 | /* See if we can consolidate */ | |
1987 | if (strcmp(right, "TRUE") == 0) | |
1988 | right_val = 1; | |
1989 | else if (strcmp(right, "FALSE") == 0) | |
1990 | right_val = 0; | |
1991 | if (right_val >= 0) { | |
1992 | /* just return the opposite */ | |
1993 | str = malloc_or_die(6); | |
1994 | if (right_val) | |
1995 | strcpy(str, "FALSE"); | |
1996 | else | |
1997 | strcpy(str, "TRUE"); | |
1998 | break; | |
1999 | } | |
2000 | len = strlen(right) + strlen(op) + 3; | |
2001 | str = malloc_or_die(len); | |
2002 | snprintf(str, len, "%s(%s)", op, right); | |
2003 | break; | |
2004 | ||
2005 | default: | |
2006 | /* ?? */ | |
2007 | break; | |
2008 | } | |
2009 | free(left); | |
2010 | free(right); | |
2011 | return str; | |
2012 | } | |
2013 | ||
2014 | static char *val_to_str(struct event_filter *filter, struct filter_arg *arg) | |
2015 | { | |
2016 | char *str; | |
2017 | ||
2018 | str = malloc_or_die(30); | |
2019 | ||
2020 | snprintf(str, 30, "%lld", arg->value.val); | |
2021 | ||
2022 | return str; | |
2023 | } | |
2024 | ||
2025 | static char *field_to_str(struct event_filter *filter, struct filter_arg *arg) | |
2026 | { | |
2027 | return strdup(arg->field.field->name); | |
2028 | } | |
2029 | ||
2030 | static char *exp_to_str(struct event_filter *filter, struct filter_arg *arg) | |
2031 | { | |
2032 | char *lstr; | |
2033 | char *rstr; | |
2034 | char *op; | |
0fed4834 | 2035 | char *str = NULL; |
f7d82350 SR |
2036 | int len; |
2037 | ||
2038 | lstr = arg_to_str(filter, arg->exp.left); | |
2039 | rstr = arg_to_str(filter, arg->exp.right); | |
0fed4834 NK |
2040 | if (!lstr || !rstr) |
2041 | goto out; | |
f7d82350 SR |
2042 | |
2043 | switch (arg->exp.type) { | |
2044 | case FILTER_EXP_ADD: | |
2045 | op = "+"; | |
2046 | break; | |
2047 | case FILTER_EXP_SUB: | |
2048 | op = "-"; | |
2049 | break; | |
2050 | case FILTER_EXP_MUL: | |
2051 | op = "*"; | |
2052 | break; | |
2053 | case FILTER_EXP_DIV: | |
2054 | op = "/"; | |
2055 | break; | |
2056 | case FILTER_EXP_MOD: | |
2057 | op = "%"; | |
2058 | break; | |
2059 | case FILTER_EXP_RSHIFT: | |
2060 | op = ">>"; | |
2061 | break; | |
2062 | case FILTER_EXP_LSHIFT: | |
2063 | op = "<<"; | |
2064 | break; | |
2065 | case FILTER_EXP_AND: | |
2066 | op = "&"; | |
2067 | break; | |
2068 | case FILTER_EXP_OR: | |
2069 | op = "|"; | |
2070 | break; | |
2071 | case FILTER_EXP_XOR: | |
2072 | op = "^"; | |
2073 | break; | |
2074 | default: | |
2075 | die("oops in exp"); | |
2076 | } | |
2077 | ||
2078 | len = strlen(op) + strlen(lstr) + strlen(rstr) + 4; | |
2079 | str = malloc_or_die(len); | |
2080 | snprintf(str, len, "%s %s %s", lstr, op, rstr); | |
0fed4834 | 2081 | out: |
f7d82350 SR |
2082 | free(lstr); |
2083 | free(rstr); | |
2084 | ||
2085 | return str; | |
2086 | } | |
2087 | ||
2088 | static char *num_to_str(struct event_filter *filter, struct filter_arg *arg) | |
2089 | { | |
2090 | char *lstr; | |
2091 | char *rstr; | |
2092 | char *str = NULL; | |
2093 | char *op = NULL; | |
2094 | int len; | |
2095 | ||
2096 | lstr = arg_to_str(filter, arg->num.left); | |
2097 | rstr = arg_to_str(filter, arg->num.right); | |
0fed4834 NK |
2098 | if (!lstr || !rstr) |
2099 | goto out; | |
f7d82350 SR |
2100 | |
2101 | switch (arg->num.type) { | |
2102 | case FILTER_CMP_EQ: | |
2103 | op = "=="; | |
2104 | /* fall through */ | |
2105 | case FILTER_CMP_NE: | |
2106 | if (!op) | |
2107 | op = "!="; | |
2108 | /* fall through */ | |
2109 | case FILTER_CMP_GT: | |
2110 | if (!op) | |
2111 | op = ">"; | |
2112 | /* fall through */ | |
2113 | case FILTER_CMP_LT: | |
2114 | if (!op) | |
2115 | op = "<"; | |
2116 | /* fall through */ | |
2117 | case FILTER_CMP_GE: | |
2118 | if (!op) | |
2119 | op = ">="; | |
2120 | /* fall through */ | |
2121 | case FILTER_CMP_LE: | |
2122 | if (!op) | |
2123 | op = "<="; | |
2124 | ||
2125 | len = strlen(lstr) + strlen(op) + strlen(rstr) + 4; | |
2126 | str = malloc_or_die(len); | |
2127 | sprintf(str, "%s %s %s", lstr, op, rstr); | |
2128 | ||
2129 | break; | |
2130 | ||
2131 | default: | |
2132 | /* ?? */ | |
2133 | break; | |
2134 | } | |
2135 | ||
0fed4834 | 2136 | out: |
f7d82350 SR |
2137 | free(lstr); |
2138 | free(rstr); | |
2139 | return str; | |
2140 | } | |
2141 | ||
2142 | static char *str_to_str(struct event_filter *filter, struct filter_arg *arg) | |
2143 | { | |
2144 | char *str = NULL; | |
2145 | char *op = NULL; | |
2146 | int len; | |
2147 | ||
2148 | switch (arg->str.type) { | |
2149 | case FILTER_CMP_MATCH: | |
2150 | op = "=="; | |
2151 | /* fall through */ | |
2152 | case FILTER_CMP_NOT_MATCH: | |
2153 | if (!op) | |
2154 | op = "!="; | |
2155 | /* fall through */ | |
2156 | case FILTER_CMP_REGEX: | |
2157 | if (!op) | |
2158 | op = "=~"; | |
2159 | /* fall through */ | |
2160 | case FILTER_CMP_NOT_REGEX: | |
2161 | if (!op) | |
2162 | op = "!~"; | |
2163 | ||
2164 | len = strlen(arg->str.field->name) + strlen(op) + | |
2165 | strlen(arg->str.val) + 6; | |
2166 | str = malloc_or_die(len); | |
2167 | snprintf(str, len, "%s %s \"%s\"", | |
2168 | arg->str.field->name, | |
2169 | op, arg->str.val); | |
2170 | break; | |
2171 | ||
2172 | default: | |
2173 | /* ?? */ | |
2174 | break; | |
2175 | } | |
2176 | return str; | |
2177 | } | |
2178 | ||
2179 | static char *arg_to_str(struct event_filter *filter, struct filter_arg *arg) | |
2180 | { | |
2181 | char *str; | |
2182 | ||
2183 | switch (arg->type) { | |
2184 | case FILTER_ARG_BOOLEAN: | |
2185 | str = malloc_or_die(6); | |
668fe01f | 2186 | if (arg->boolean.value) |
f7d82350 SR |
2187 | strcpy(str, "TRUE"); |
2188 | else | |
2189 | strcpy(str, "FALSE"); | |
2190 | return str; | |
2191 | ||
2192 | case FILTER_ARG_OP: | |
2193 | return op_to_str(filter, arg); | |
2194 | ||
2195 | case FILTER_ARG_NUM: | |
2196 | return num_to_str(filter, arg); | |
2197 | ||
2198 | case FILTER_ARG_STR: | |
2199 | return str_to_str(filter, arg); | |
2200 | ||
2201 | case FILTER_ARG_VALUE: | |
2202 | return val_to_str(filter, arg); | |
2203 | ||
2204 | case FILTER_ARG_FIELD: | |
2205 | return field_to_str(filter, arg); | |
2206 | ||
2207 | case FILTER_ARG_EXP: | |
2208 | return exp_to_str(filter, arg); | |
2209 | ||
2210 | default: | |
2211 | /* ?? */ | |
2212 | return NULL; | |
2213 | } | |
2214 | ||
2215 | } | |
2216 | ||
2217 | /** | |
2218 | * pevent_filter_make_string - return a string showing the filter | |
2219 | * @filter: filter struct with filter information | |
2220 | * @event_id: the event id to return the filter string with | |
2221 | * | |
2222 | * Returns a string that displays the filter contents. | |
2223 | * This string must be freed with free(str). | |
2224 | * NULL is returned if no filter is found. | |
2225 | */ | |
2226 | char * | |
2227 | pevent_filter_make_string(struct event_filter *filter, int event_id) | |
2228 | { | |
2229 | struct filter_type *filter_type; | |
2230 | ||
2231 | if (!filter->filters) | |
2232 | return NULL; | |
2233 | ||
2234 | filter_type = find_filter_type(filter, event_id); | |
2235 | ||
2236 | if (!filter_type) | |
2237 | return NULL; | |
2238 | ||
2239 | return arg_to_str(filter, filter_type->filter); | |
2240 | } | |
2241 | ||
2242 | /** | |
2243 | * pevent_filter_compare - compare two filters and return if they are the same | |
2244 | * @filter1: Filter to compare with @filter2 | |
2245 | * @filter2: Filter to compare with @filter1 | |
2246 | * | |
2247 | * Returns: | |
2248 | * 1 if the two filters hold the same content. | |
2249 | * 0 if they do not. | |
2250 | */ | |
2251 | int pevent_filter_compare(struct event_filter *filter1, struct event_filter *filter2) | |
2252 | { | |
2253 | struct filter_type *filter_type1; | |
2254 | struct filter_type *filter_type2; | |
2255 | char *str1, *str2; | |
2256 | int result; | |
2257 | int i; | |
2258 | ||
2259 | /* Do the easy checks first */ | |
2260 | if (filter1->filters != filter2->filters) | |
2261 | return 0; | |
2262 | if (!filter1->filters && !filter2->filters) | |
2263 | return 1; | |
2264 | ||
2265 | /* | |
2266 | * Now take a look at each of the events to see if they have the same | |
2267 | * filters to them. | |
2268 | */ | |
2269 | for (i = 0; i < filter1->filters; i++) { | |
2270 | filter_type1 = &filter1->event_filters[i]; | |
2271 | filter_type2 = find_filter_type(filter2, filter_type1->event_id); | |
2272 | if (!filter_type2) | |
2273 | break; | |
2274 | if (filter_type1->filter->type != filter_type2->filter->type) | |
2275 | break; | |
2276 | switch (filter_type1->filter->type) { | |
2277 | case FILTER_TRIVIAL_FALSE: | |
2278 | case FILTER_TRIVIAL_TRUE: | |
2279 | /* trivial types just need the type compared */ | |
2280 | continue; | |
2281 | default: | |
2282 | break; | |
2283 | } | |
2284 | /* The best way to compare complex filters is with strings */ | |
2285 | str1 = arg_to_str(filter1, filter_type1->filter); | |
2286 | str2 = arg_to_str(filter2, filter_type2->filter); | |
0fed4834 NK |
2287 | if (str1 && str2) |
2288 | result = strcmp(str1, str2) != 0; | |
2289 | else | |
2290 | /* bail out if allocation fails */ | |
2291 | result = 1; | |
2292 | ||
f7d82350 SR |
2293 | free(str1); |
2294 | free(str2); | |
2295 | if (result) | |
2296 | break; | |
2297 | } | |
2298 | ||
2299 | if (i < filter1->filters) | |
2300 | return 0; | |
2301 | return 1; | |
2302 | } | |
2303 |