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7c673cae FG |
1 | /*- |
2 | * BSD LICENSE | |
3 | * | |
4 | * Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>. | |
5 | * Copyright (c) Intel Corporation. | |
6 | * All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * * Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * * Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in | |
16 | * the documentation and/or other materials provided with the | |
17 | * distribution. | |
18 | * * Neither the name of Intel Corporation nor the names of its | |
19 | * contributors may be used to endorse or promote products derived | |
20 | * from this software without specific prior written permission. | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
23 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
24 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
25 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
26 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
27 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
28 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
29 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
30 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
32 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
33 | */ | |
34 | ||
11fdf7f2 | 35 | #include "spdk/stdinc.h" |
7c673cae | 36 | |
11fdf7f2 | 37 | #include "spdk/conf.h" |
7c673cae | 38 | #include "spdk/string.h" |
11fdf7f2 | 39 | #include "spdk/log.h" |
7c673cae FG |
40 | |
41 | struct spdk_conf_value { | |
42 | struct spdk_conf_value *next; | |
43 | char *value; | |
44 | }; | |
45 | ||
46 | struct spdk_conf_item { | |
47 | struct spdk_conf_item *next; | |
48 | char *key; | |
49 | struct spdk_conf_value *val; | |
50 | }; | |
51 | ||
52 | struct spdk_conf_section { | |
53 | struct spdk_conf_section *next; | |
54 | char *name; | |
55 | int num; | |
56 | struct spdk_conf_item *item; | |
57 | }; | |
58 | ||
59 | struct spdk_conf { | |
60 | char *file; | |
61 | struct spdk_conf_section *current_section; | |
62 | struct spdk_conf_section *section; | |
63 | }; | |
64 | ||
65 | #define CF_DELIM " \t" | |
66 | ||
67 | #define LIB_MAX_TMPBUF 1024 | |
68 | ||
69 | static struct spdk_conf *default_config = NULL; | |
70 | ||
71 | struct spdk_conf * | |
72 | spdk_conf_allocate(void) | |
73 | { | |
74 | return calloc(1, sizeof(struct spdk_conf)); | |
75 | } | |
76 | ||
77 | static void | |
78 | free_conf_value(struct spdk_conf_value *vp) | |
79 | { | |
80 | if (vp == NULL) { | |
81 | return; | |
82 | } | |
83 | ||
84 | if (vp->value) { | |
85 | free(vp->value); | |
86 | } | |
87 | ||
88 | free(vp); | |
89 | } | |
90 | ||
91 | static void | |
92 | free_all_conf_value(struct spdk_conf_value *vp) | |
93 | { | |
94 | struct spdk_conf_value *next; | |
95 | ||
96 | if (vp == NULL) { | |
97 | return; | |
98 | } | |
99 | ||
100 | while (vp != NULL) { | |
101 | next = vp->next; | |
102 | free_conf_value(vp); | |
103 | vp = next; | |
104 | } | |
105 | } | |
106 | ||
107 | static void | |
108 | free_conf_item(struct spdk_conf_item *ip) | |
109 | { | |
110 | if (ip == NULL) { | |
111 | return; | |
112 | } | |
113 | ||
114 | if (ip->val != NULL) { | |
115 | free_all_conf_value(ip->val); | |
116 | } | |
117 | ||
118 | if (ip->key != NULL) { | |
119 | free(ip->key); | |
120 | } | |
121 | ||
122 | free(ip); | |
123 | } | |
124 | ||
125 | static void | |
126 | free_all_conf_item(struct spdk_conf_item *ip) | |
127 | { | |
128 | struct spdk_conf_item *next; | |
129 | ||
130 | if (ip == NULL) { | |
131 | return; | |
132 | } | |
133 | ||
134 | while (ip != NULL) { | |
135 | next = ip->next; | |
136 | free_conf_item(ip); | |
137 | ip = next; | |
138 | } | |
139 | } | |
140 | ||
141 | static void | |
142 | free_conf_section(struct spdk_conf_section *sp) | |
143 | { | |
144 | if (sp == NULL) { | |
145 | return; | |
146 | } | |
147 | ||
148 | if (sp->item) { | |
149 | free_all_conf_item(sp->item); | |
150 | } | |
151 | ||
152 | if (sp->name) { | |
153 | free(sp->name); | |
154 | } | |
155 | ||
156 | free(sp); | |
157 | } | |
158 | ||
159 | static void | |
160 | free_all_conf_section(struct spdk_conf_section *sp) | |
161 | { | |
162 | struct spdk_conf_section *next; | |
163 | ||
164 | if (sp == NULL) { | |
165 | return; | |
166 | } | |
167 | ||
168 | while (sp != NULL) { | |
169 | next = sp->next; | |
170 | free_conf_section(sp); | |
171 | sp = next; | |
172 | } | |
173 | } | |
174 | ||
175 | void | |
176 | spdk_conf_free(struct spdk_conf *cp) | |
177 | { | |
178 | if (cp == NULL) { | |
179 | return; | |
180 | } | |
181 | ||
182 | if (cp->section != NULL) { | |
183 | free_all_conf_section(cp->section); | |
184 | } | |
185 | ||
186 | if (cp->file != NULL) { | |
187 | free(cp->file); | |
188 | } | |
189 | ||
190 | free(cp); | |
191 | } | |
192 | ||
193 | static struct spdk_conf_section * | |
194 | allocate_cf_section(void) | |
195 | { | |
196 | return calloc(1, sizeof(struct spdk_conf_section)); | |
197 | } | |
198 | ||
199 | static struct spdk_conf_item * | |
200 | allocate_cf_item(void) | |
201 | { | |
202 | return calloc(1, sizeof(struct spdk_conf_item)); | |
203 | } | |
204 | ||
205 | static struct spdk_conf_value * | |
206 | allocate_cf_value(void) | |
207 | { | |
208 | return calloc(1, sizeof(struct spdk_conf_value)); | |
209 | } | |
210 | ||
211 | ||
212 | #define CHECK_CP_OR_USE_DEFAULT(cp) (((cp) == NULL) && (default_config != NULL)) ? default_config : (cp) | |
213 | ||
214 | struct spdk_conf_section * | |
215 | spdk_conf_find_section(struct spdk_conf *cp, const char *name) | |
216 | { | |
217 | struct spdk_conf_section *sp; | |
218 | ||
219 | if (name == NULL || name[0] == '\0') { | |
220 | return NULL; | |
221 | } | |
222 | ||
223 | cp = CHECK_CP_OR_USE_DEFAULT(cp); | |
224 | if (cp == NULL) { | |
225 | return NULL; | |
226 | } | |
227 | ||
228 | for (sp = cp->section; sp != NULL; sp = sp->next) { | |
229 | if (sp->name != NULL && sp->name[0] == name[0] | |
230 | && strcasecmp(sp->name, name) == 0) { | |
231 | return sp; | |
232 | } | |
233 | } | |
234 | ||
235 | return NULL; | |
236 | } | |
237 | ||
238 | struct spdk_conf_section * | |
239 | spdk_conf_first_section(struct spdk_conf *cp) | |
240 | { | |
241 | cp = CHECK_CP_OR_USE_DEFAULT(cp); | |
242 | if (cp == NULL) { | |
243 | return NULL; | |
244 | } | |
245 | ||
246 | return cp->section; | |
247 | } | |
248 | ||
249 | struct spdk_conf_section * | |
250 | spdk_conf_next_section(struct spdk_conf_section *sp) | |
251 | { | |
252 | if (sp == NULL) { | |
253 | return NULL; | |
254 | } | |
255 | ||
256 | return sp->next; | |
257 | } | |
258 | ||
259 | static void | |
260 | append_cf_section(struct spdk_conf *cp, struct spdk_conf_section *sp) | |
261 | { | |
262 | struct spdk_conf_section *last; | |
263 | ||
264 | cp = CHECK_CP_OR_USE_DEFAULT(cp); | |
265 | if (cp == NULL) { | |
11fdf7f2 | 266 | SPDK_ERRLOG("cp == NULL\n"); |
7c673cae FG |
267 | return; |
268 | } | |
269 | ||
270 | if (cp->section == NULL) { | |
271 | cp->section = sp; | |
272 | return; | |
273 | } | |
274 | ||
275 | for (last = cp->section; last->next != NULL; last = last->next) | |
276 | ; | |
277 | last->next = sp; | |
278 | } | |
279 | ||
280 | static struct spdk_conf_item * | |
281 | find_cf_nitem(struct spdk_conf_section *sp, const char *key, int idx) | |
282 | { | |
283 | struct spdk_conf_item *ip; | |
284 | int i; | |
285 | ||
286 | if (key == NULL || key[0] == '\0') { | |
287 | return NULL; | |
288 | } | |
289 | ||
290 | i = 0; | |
291 | for (ip = sp->item; ip != NULL; ip = ip->next) { | |
292 | if (ip->key != NULL && ip->key[0] == key[0] | |
293 | && strcasecmp(ip->key, key) == 0) { | |
294 | if (i == idx) { | |
295 | return ip; | |
296 | } | |
297 | i++; | |
298 | } | |
299 | } | |
300 | ||
301 | return NULL; | |
302 | } | |
303 | ||
304 | static void | |
305 | append_cf_item(struct spdk_conf_section *sp, struct spdk_conf_item *ip) | |
306 | { | |
307 | struct spdk_conf_item *last; | |
308 | ||
309 | if (sp == NULL) { | |
310 | return; | |
311 | } | |
312 | ||
313 | if (sp->item == NULL) { | |
314 | sp->item = ip; | |
315 | return; | |
316 | } | |
317 | ||
318 | for (last = sp->item; last->next != NULL; last = last->next) | |
319 | ; | |
320 | last->next = ip; | |
321 | } | |
322 | ||
323 | static void | |
324 | append_cf_value(struct spdk_conf_item *ip, struct spdk_conf_value *vp) | |
325 | { | |
326 | struct spdk_conf_value *last; | |
327 | ||
328 | if (ip == NULL) { | |
329 | return; | |
330 | } | |
331 | ||
332 | if (ip->val == NULL) { | |
333 | ip->val = vp; | |
334 | return; | |
335 | } | |
336 | ||
337 | for (last = ip->val; last->next != NULL; last = last->next) | |
338 | ; | |
339 | last->next = vp; | |
340 | } | |
341 | ||
342 | bool | |
343 | spdk_conf_section_match_prefix(const struct spdk_conf_section *sp, const char *name_prefix) | |
344 | { | |
345 | return strncasecmp(sp->name, name_prefix, strlen(name_prefix)) == 0; | |
346 | } | |
347 | ||
348 | const char * | |
349 | spdk_conf_section_get_name(const struct spdk_conf_section *sp) | |
350 | { | |
351 | return sp->name; | |
352 | } | |
353 | ||
354 | int | |
355 | spdk_conf_section_get_num(const struct spdk_conf_section *sp) | |
356 | { | |
357 | return sp->num; | |
358 | } | |
359 | ||
360 | char * | |
361 | spdk_conf_section_get_nmval(struct spdk_conf_section *sp, const char *key, int idx1, int idx2) | |
362 | { | |
363 | struct spdk_conf_item *ip; | |
364 | struct spdk_conf_value *vp; | |
365 | int i; | |
366 | ||
367 | ip = find_cf_nitem(sp, key, idx1); | |
368 | if (ip == NULL) { | |
369 | return NULL; | |
370 | } | |
371 | ||
372 | vp = ip->val; | |
373 | if (vp == NULL) { | |
374 | return NULL; | |
375 | } | |
376 | ||
377 | for (i = 0; vp != NULL; vp = vp->next, i++) { | |
378 | if (i == idx2) { | |
379 | return vp->value; | |
380 | } | |
381 | } | |
382 | ||
383 | return NULL; | |
384 | } | |
385 | ||
386 | char * | |
387 | spdk_conf_section_get_nval(struct spdk_conf_section *sp, const char *key, int idx) | |
388 | { | |
389 | struct spdk_conf_item *ip; | |
390 | struct spdk_conf_value *vp; | |
391 | ||
392 | ip = find_cf_nitem(sp, key, idx); | |
393 | if (ip == NULL) { | |
394 | return NULL; | |
395 | } | |
396 | ||
397 | vp = ip->val; | |
398 | if (vp == NULL) { | |
399 | return NULL; | |
400 | } | |
401 | ||
402 | return vp->value; | |
403 | } | |
404 | ||
405 | char * | |
406 | spdk_conf_section_get_val(struct spdk_conf_section *sp, const char *key) | |
407 | { | |
408 | return spdk_conf_section_get_nval(sp, key, 0); | |
409 | } | |
410 | ||
411 | int | |
412 | spdk_conf_section_get_intval(struct spdk_conf_section *sp, const char *key) | |
413 | { | |
414 | const char *v; | |
415 | int value; | |
416 | ||
417 | v = spdk_conf_section_get_nval(sp, key, 0); | |
418 | if (v == NULL) { | |
419 | return -1; | |
420 | } | |
421 | ||
422 | value = (int)strtol(v, NULL, 10); | |
423 | return value; | |
424 | } | |
425 | ||
426 | bool | |
427 | spdk_conf_section_get_boolval(struct spdk_conf_section *sp, const char *key, bool default_val) | |
428 | { | |
429 | const char *v; | |
430 | ||
431 | v = spdk_conf_section_get_nval(sp, key, 0); | |
432 | if (v == NULL) { | |
433 | return default_val; | |
434 | } | |
435 | ||
436 | if (!strcasecmp(v, "Yes") || !strcasecmp(v, "Y") || !strcasecmp(v, "True")) { | |
437 | return true; | |
438 | } | |
439 | ||
440 | if (!strcasecmp(v, "No") || !strcasecmp(v, "N") || !strcasecmp(v, "False")) { | |
441 | return false; | |
442 | } | |
443 | ||
444 | return default_val; | |
445 | } | |
446 | ||
447 | static int | |
448 | parse_line(struct spdk_conf *cp, char *lp) | |
449 | { | |
450 | struct spdk_conf_section *sp; | |
451 | struct spdk_conf_item *ip; | |
452 | struct spdk_conf_value *vp; | |
453 | char *arg; | |
454 | char *key; | |
455 | char *val; | |
456 | char *p; | |
457 | int num; | |
458 | ||
459 | arg = spdk_str_trim(lp); | |
460 | if (arg == NULL) { | |
11fdf7f2 | 461 | SPDK_ERRLOG("no section\n"); |
7c673cae FG |
462 | return -1; |
463 | } | |
464 | ||
465 | if (arg[0] == '[') { | |
466 | /* section */ | |
467 | arg++; | |
468 | key = spdk_strsepq(&arg, "]"); | |
469 | if (key == NULL || arg != NULL) { | |
11fdf7f2 | 470 | SPDK_ERRLOG("broken section\n"); |
7c673cae FG |
471 | return -1; |
472 | } | |
473 | /* determine section number */ | |
474 | for (p = key; *p != '\0' && !isdigit((int) *p); p++) | |
475 | ; | |
476 | if (*p != '\0') { | |
477 | num = (int)strtol(p, NULL, 10); | |
478 | } else { | |
479 | num = 0; | |
480 | } | |
481 | ||
482 | sp = spdk_conf_find_section(cp, key); | |
483 | if (sp == NULL) { | |
484 | sp = allocate_cf_section(); | |
485 | append_cf_section(cp, sp); | |
11fdf7f2 TL |
486 | |
487 | sp->name = strdup(key); | |
488 | if (sp->name == NULL) { | |
489 | SPDK_ERRLOG("cannot duplicate %s to sp->name\n", key); | |
490 | return -1; | |
491 | } | |
7c673cae FG |
492 | } |
493 | cp->current_section = sp; | |
11fdf7f2 | 494 | |
7c673cae FG |
495 | |
496 | sp->num = num; | |
497 | } else { | |
498 | /* parameters */ | |
499 | sp = cp->current_section; | |
500 | if (sp == NULL) { | |
11fdf7f2 | 501 | SPDK_ERRLOG("unknown section\n"); |
7c673cae FG |
502 | return -1; |
503 | } | |
504 | key = spdk_strsepq(&arg, CF_DELIM); | |
505 | if (key == NULL) { | |
11fdf7f2 | 506 | SPDK_ERRLOG("broken key\n"); |
7c673cae FG |
507 | return -1; |
508 | } | |
509 | ||
510 | ip = allocate_cf_item(); | |
511 | if (ip == NULL) { | |
11fdf7f2 | 512 | SPDK_ERRLOG("cannot allocate cf item\n"); |
7c673cae FG |
513 | return -1; |
514 | } | |
515 | append_cf_item(sp, ip); | |
516 | ip->key = strdup(key); | |
517 | if (ip->key == NULL) { | |
11fdf7f2 | 518 | SPDK_ERRLOG("cannot make duplicate of %s\n", key); |
7c673cae FG |
519 | return -1; |
520 | } | |
521 | ip->val = NULL; | |
522 | if (arg != NULL) { | |
523 | /* key has value(s) */ | |
524 | while (arg != NULL) { | |
525 | val = spdk_strsepq(&arg, CF_DELIM); | |
526 | vp = allocate_cf_value(); | |
527 | if (vp == NULL) { | |
11fdf7f2 | 528 | SPDK_ERRLOG("cannot allocate cf value\n"); |
7c673cae FG |
529 | return -1; |
530 | } | |
531 | append_cf_value(ip, vp); | |
532 | vp->value = strdup(val); | |
533 | if (vp->value == NULL) { | |
11fdf7f2 | 534 | SPDK_ERRLOG("cannot duplicate %s to vp->value\n", val); |
7c673cae FG |
535 | return -1; |
536 | } | |
537 | } | |
538 | } | |
539 | } | |
540 | ||
541 | return 0; | |
542 | } | |
543 | ||
544 | static char * | |
545 | fgets_line(FILE *fp) | |
546 | { | |
547 | char *dst, *dst2, *p; | |
548 | size_t total, len; | |
549 | ||
550 | dst = p = malloc(LIB_MAX_TMPBUF); | |
551 | if (!dst) { | |
552 | return NULL; | |
553 | } | |
554 | ||
555 | dst[0] = '\0'; | |
556 | total = 0; | |
557 | ||
558 | while (fgets(p, LIB_MAX_TMPBUF, fp) != NULL) { | |
559 | len = strlen(p); | |
560 | total += len; | |
561 | if (len + 1 < LIB_MAX_TMPBUF || dst[total - 1] == '\n') { | |
562 | dst2 = realloc(dst, total + 1); | |
563 | if (!dst2) { | |
564 | free(dst); | |
565 | return NULL; | |
566 | } else { | |
567 | return dst2; | |
568 | } | |
569 | } | |
570 | ||
571 | dst2 = realloc(dst, total + LIB_MAX_TMPBUF); | |
572 | if (!dst2) { | |
573 | free(dst); | |
574 | return NULL; | |
575 | } else { | |
576 | dst = dst2; | |
577 | } | |
578 | ||
579 | p = dst + total; | |
580 | } | |
581 | ||
582 | if (feof(fp) && total != 0) { | |
583 | dst2 = realloc(dst, total + 2); | |
584 | if (!dst2) { | |
585 | free(dst); | |
586 | return NULL; | |
587 | } else { | |
588 | dst = dst2; | |
589 | } | |
590 | ||
591 | dst[total] = '\n'; | |
592 | dst[total + 1] = '\0'; | |
593 | return dst; | |
594 | } | |
595 | ||
596 | free(dst); | |
597 | ||
598 | return NULL; | |
599 | } | |
600 | ||
601 | int | |
602 | spdk_conf_read(struct spdk_conf *cp, const char *file) | |
603 | { | |
604 | FILE *fp; | |
605 | char *lp, *p; | |
606 | char *lp2, *q; | |
607 | int line; | |
608 | int n, n2; | |
609 | ||
610 | if (file == NULL || file[0] == '\0') { | |
611 | return -1; | |
612 | } | |
613 | ||
614 | fp = fopen(file, "r"); | |
615 | if (fp == NULL) { | |
11fdf7f2 | 616 | SPDK_ERRLOG("open error: %s\n", file); |
7c673cae FG |
617 | return -1; |
618 | } | |
619 | ||
620 | cp->file = strdup(file); | |
621 | if (cp->file == NULL) { | |
11fdf7f2 | 622 | SPDK_ERRLOG("cannot duplicate %s to cp->file\n", file); |
7c673cae FG |
623 | fclose(fp); |
624 | return -1; | |
625 | } | |
626 | ||
627 | line = 1; | |
628 | while ((lp = fgets_line(fp)) != NULL) { | |
629 | /* skip spaces */ | |
630 | for (p = lp; *p != '\0' && isspace((int) *p); p++) | |
631 | ; | |
632 | /* skip comment, empty line */ | |
633 | if (p[0] == '#' || p[0] == '\0') { | |
634 | goto next_line; | |
635 | } | |
636 | ||
637 | /* concatenate line end with '\' */ | |
638 | n = strlen(p); | |
639 | while (n > 2 && p[n - 1] == '\n' && p[n - 2] == '\\') { | |
640 | n -= 2; | |
641 | lp2 = fgets_line(fp); | |
642 | if (lp2 == NULL) { | |
643 | break; | |
644 | } | |
645 | ||
646 | line++; | |
647 | n2 = strlen(lp2); | |
648 | ||
649 | q = malloc(n + n2 + 1); | |
650 | if (!q) { | |
651 | free(lp2); | |
652 | free(lp); | |
11fdf7f2 | 653 | SPDK_ERRLOG("malloc failed at line %d of %s\n", line, cp->file); |
7c673cae FG |
654 | fclose(fp); |
655 | return -1; | |
656 | } | |
657 | ||
658 | memcpy(q, p, n); | |
659 | memcpy(q + n, lp2, n2); | |
660 | q[n + n2] = '\0'; | |
661 | free(lp2); | |
662 | free(lp); | |
663 | p = lp = q; | |
664 | n += n2; | |
665 | } | |
666 | ||
667 | /* parse one line */ | |
668 | if (parse_line(cp, p) < 0) { | |
11fdf7f2 | 669 | SPDK_ERRLOG("parse error at line %d of %s\n", line, cp->file); |
7c673cae FG |
670 | } |
671 | next_line: | |
672 | line++; | |
673 | free(lp); | |
674 | } | |
675 | ||
676 | fclose(fp); | |
677 | return 0; | |
678 | } | |
679 | ||
680 | void | |
681 | spdk_conf_set_as_default(struct spdk_conf *cp) | |
682 | { | |
683 | default_config = cp; | |
684 | } |