Line data Source code
1 : /*
2 : ldb database library
3 :
4 : Copyright (C) Andrew Tridgell 2004
5 :
6 : ** NOTE! The following LGPL license applies to the ldb
7 : ** library. This does NOT imply that all of Samba is released
8 : ** under the LGPL
9 :
10 : This library is free software; you can redistribute it and/or
11 : modify it under the terms of the GNU Lesser General Public
12 : License as published by the Free Software Foundation; either
13 : version 3 of the License, or (at your option) any later version.
14 :
15 : This library is distributed in the hope that it will be useful,
16 : but WITHOUT ANY WARRANTY; without even the implied warranty of
17 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 : Lesser General Public License for more details.
19 :
20 : You should have received a copy of the GNU Lesser General Public
21 : License along with this library; if not, see <http://www.gnu.org/licenses/>.
22 : */
23 :
24 : /*
25 : * Name: ldb
26 : *
27 : * Component: ldb search functions
28 : *
29 : * Description: functions to search ldb+tdb databases
30 : *
31 : * Author: Andrew Tridgell
32 : */
33 :
34 : #include "ldb_kv.h"
35 : #include "ldb_private.h"
36 : #include "lib/util/attr.h"
37 : /*
38 : search the database for a single simple dn.
39 : return LDB_ERR_NO_SUCH_OBJECT on record-not-found
40 : and LDB_SUCCESS on success
41 : */
42 95378536 : int ldb_kv_search_base(struct ldb_module *module,
43 : TALLOC_CTX *mem_ctx,
44 : struct ldb_dn *dn,
45 : struct ldb_dn **ret_dn)
46 : {
47 2268099 : int exists;
48 2268099 : int ret;
49 95378536 : struct ldb_message *msg = NULL;
50 :
51 95378536 : if (ldb_dn_is_null(dn)) {
52 0 : return LDB_ERR_NO_SUCH_OBJECT;
53 : }
54 :
55 : /*
56 : * We can't use tdb_exists() directly on a key when the TDB
57 : * key is the GUID one, not the DN based one. So we just do a
58 : * normal search and avoid most of the allocation with the
59 : * LDB_UNPACK_DATA_FLAG_NO_ATTRS flag
60 : */
61 95378536 : msg = ldb_msg_new(module);
62 95378536 : if (msg == NULL) {
63 0 : return LDB_ERR_OPERATIONS_ERROR;
64 : }
65 :
66 95378536 : ret = ldb_kv_search_dn1(module, dn, msg, LDB_UNPACK_DATA_FLAG_NO_ATTRS);
67 95378536 : if (ret == LDB_SUCCESS) {
68 2267845 : const char *dn_linearized
69 95296698 : = ldb_dn_get_linearized(dn);
70 2267845 : const char *msg_dn_linearized
71 95296698 : = ldb_dn_get_linearized(msg->dn);
72 :
73 95296698 : if (strcmp(dn_linearized, msg_dn_linearized) == 0) {
74 : /*
75 : * Re-use the full incoming DN for
76 : * subtree checks
77 : */
78 95271893 : *ret_dn = dn;
79 : } else {
80 : /*
81 : * Use the string DN from the unpack, so that
82 : * we have a case-exact match of the base
83 : */
84 24805 : *ret_dn = talloc_steal(mem_ctx, msg->dn);
85 : }
86 93028853 : exists = true;
87 81838 : } else if (ret == LDB_ERR_NO_SUCH_OBJECT) {
88 81584 : exists = false;
89 : } else {
90 0 : talloc_free(msg);
91 0 : return ret;
92 : }
93 95378536 : talloc_free(msg);
94 95378536 : if (exists) {
95 95296698 : return LDB_SUCCESS;
96 : }
97 81584 : return LDB_ERR_NO_SUCH_OBJECT;
98 : }
99 :
100 : struct ldb_kv_parse_data_unpack_ctx {
101 : struct ldb_message *msg;
102 : struct ldb_module *module;
103 : struct ldb_kv_private *ldb_kv;
104 : unsigned int unpack_flags;
105 : };
106 :
107 383233536 : static int ldb_kv_parse_data_unpack(struct ldb_val key,
108 : struct ldb_val data,
109 : void *private_data)
110 : {
111 383233536 : struct ldb_kv_parse_data_unpack_ctx *ctx = private_data;
112 10872821 : int ret;
113 383233536 : struct ldb_context *ldb = ldb_module_get_ctx(ctx->module);
114 383233536 : struct ldb_val data_parse = data;
115 :
116 383233536 : struct ldb_kv_private *ldb_kv = ctx->ldb_kv;
117 :
118 383233536 : if ((ldb_kv->kv_ops->options & LDB_KV_OPTION_STABLE_READ_LOCK) &&
119 172861587 : (ctx->unpack_flags & LDB_UNPACK_DATA_FLAG_READ_LOCKED) &&
120 83104076 : !ldb_kv->kv_ops->transaction_active(ldb_kv)) {
121 : /*
122 : * In the case where no transactions are active and
123 : * we're in a read-lock, we can point directly into
124 : * database memory.
125 : *
126 : * The database can't be changed underneath us and we
127 : * will duplicate this data in the call to filter.
128 : *
129 : * This is seen in:
130 : * - ldb_kv_index_filter
131 : * - ldb_kv_search_and_return_base
132 : */
133 : } else {
134 : /*
135 : * In every other case, since unpack doesn't memdup, we need
136 : * to at least do a memdup on the whole data buffer as that
137 : * may change later and the caller needs a stable result.
138 : *
139 : * During transactions, pointers could change and in
140 : * TDB, there just aren't the same guarantees.
141 : */
142 327259519 : data_parse.data = talloc_memdup(ctx->msg,
143 : data.data,
144 : data.length);
145 327259519 : if (data_parse.data == NULL) {
146 0 : ldb_debug(ldb, LDB_DEBUG_ERROR,
147 : "Unable to allocate data(%d) for %*.*s\n",
148 0 : (int)data.length,
149 0 : (int)key.length, (int)key.length, key.data);
150 0 : return LDB_ERR_OPERATIONS_ERROR;
151 : }
152 : }
153 :
154 383233536 : ret = ldb_unpack_data_flags(ldb, &data_parse,
155 : ctx->msg, ctx->unpack_flags);
156 383233536 : if (ret == -1) {
157 0 : if (data_parse.data != data.data) {
158 0 : talloc_free(data_parse.data);
159 : }
160 :
161 0 : ldb_debug(ldb, LDB_DEBUG_ERROR,
162 : __location__ ": Invalid data for index %*.*s\n",
163 0 : (int)key.length, (int)key.length, key.data);
164 0 : return LDB_ERR_OPERATIONS_ERROR;
165 : }
166 372360715 : return ret;
167 : }
168 :
169 : /*
170 : search the database for a single simple dn, returning all attributes
171 : in a single message
172 :
173 : return LDB_ERR_NO_SUCH_OBJECT on record-not-found
174 : and LDB_SUCCESS on success
175 : */
176 466345008 : int ldb_kv_search_key(struct ldb_module *module,
177 : struct ldb_kv_private *ldb_kv,
178 : const struct ldb_val ldb_key,
179 : struct ldb_message *msg,
180 : unsigned int unpack_flags)
181 : {
182 13698170 : int ret;
183 466345008 : struct ldb_kv_parse_data_unpack_ctx ctx = {
184 : .msg = msg,
185 : .module = module,
186 : .unpack_flags = unpack_flags,
187 : .ldb_kv = ldb_kv
188 : };
189 :
190 466345008 : memset(msg, 0, sizeof(*msg));
191 :
192 466345008 : msg->num_elements = 0;
193 466345008 : msg->elements = NULL;
194 :
195 466345008 : ret = ldb_kv->kv_ops->fetch_and_parse(
196 : ldb_kv, ldb_key, ldb_kv_parse_data_unpack, &ctx);
197 :
198 466345008 : if (ret == -1) {
199 0 : ret = ldb_kv->kv_ops->error(ldb_kv);
200 0 : if (ret == LDB_SUCCESS) {
201 : /*
202 : * Just to be sure we don't turn errors
203 : * into success
204 : */
205 0 : return LDB_ERR_OPERATIONS_ERROR;
206 : }
207 0 : return ret;
208 466345008 : } else if (ret != LDB_SUCCESS) {
209 83111472 : return ret;
210 : }
211 :
212 372360715 : return LDB_SUCCESS;
213 : }
214 :
215 : /*
216 : search the database for a single simple dn, returning all attributes
217 : in a single message
218 :
219 : return LDB_ERR_NO_SUCH_OBJECT on record-not-found
220 : and LDB_SUCCESS on success
221 : */
222 325520244 : int ldb_kv_search_dn1(struct ldb_module *module,
223 : struct ldb_dn *dn,
224 : struct ldb_message *msg,
225 : unsigned int unpack_flags)
226 : {
227 325520244 : void *data = ldb_module_get_private(module);
228 11416435 : struct ldb_kv_private *ldb_kv =
229 325520244 : talloc_get_type(data, struct ldb_kv_private);
230 11416435 : int ret;
231 11416435 : uint8_t guid_key[LDB_KV_GUID_KEY_SIZE];
232 325520244 : struct ldb_val key = {
233 : .data = guid_key,
234 : .length = sizeof(guid_key)
235 : };
236 325520244 : TALLOC_CTX *tdb_key_ctx = NULL;
237 :
238 325520244 : bool valid_dn = ldb_dn_validate(dn);
239 325520244 : if (valid_dn == false) {
240 0 : ldb_asprintf_errstring(ldb_module_get_ctx(module),
241 : "Invalid Base DN: %s",
242 : ldb_dn_get_linearized(dn));
243 0 : return LDB_ERR_INVALID_DN_SYNTAX;
244 : }
245 :
246 647079180 : if (ldb_kv->cache->GUID_index_attribute == NULL ||
247 321558936 : ldb_dn_is_special(dn)) {
248 :
249 198396550 : tdb_key_ctx = talloc_new(msg);
250 198396550 : if (!tdb_key_ctx) {
251 0 : return ldb_module_oom(module);
252 : }
253 :
254 : /* form the key */
255 198396550 : key = ldb_kv_key_dn(tdb_key_ctx, dn);
256 198396550 : if (!key.data) {
257 0 : TALLOC_FREE(tdb_key_ctx);
258 0 : return LDB_ERR_OPERATIONS_ERROR;
259 : }
260 : } else {
261 : /*
262 : * Look in the index to find the key for this DN.
263 : *
264 : * the tdb_key memory is allocated above, msg is just
265 : * used for internal memory.
266 : *
267 : */
268 127123694 : ret = ldb_kv_key_dn_from_idx(module, ldb_kv, msg, dn, &key);
269 127123694 : if (ret != LDB_SUCCESS) {
270 1913712 : return ret;
271 : }
272 : }
273 :
274 323264364 : ret = ldb_kv_search_key(module, ldb_kv, key, msg, unpack_flags);
275 :
276 323264364 : TALLOC_FREE(tdb_key_ctx);
277 :
278 323264364 : if (ret != LDB_SUCCESS) {
279 15431403 : return ret;
280 : }
281 :
282 306496378 : if ((unpack_flags & LDB_UNPACK_DATA_FLAG_NO_DN) == 0) {
283 201762926 : if (!msg->dn) {
284 0 : msg->dn = ldb_dn_copy(msg, dn);
285 : }
286 201762926 : if (!msg->dn) {
287 0 : return LDB_ERR_OPERATIONS_ERROR;
288 : }
289 : }
290 :
291 296758694 : return LDB_SUCCESS;
292 : }
293 :
294 : /*
295 : * filter the specified list of attributes from msg,
296 : * adding requested attributes, and perhaps all for *.
297 : * The DN will not be added if it is missing.
298 : */
299 103416045 : int ldb_kv_filter_attrs_in_place(struct ldb_message *msg,
300 : const char *const *attrs)
301 : {
302 103416045 : return ldb_filter_attrs_in_place(msg, attrs);
303 : }
304 :
305 : /*
306 : search function for a non-indexed search
307 : */
308 539853535 : static int search_func(_UNUSED_ struct ldb_kv_private *ldb_kv,
309 : struct ldb_val key,
310 : struct ldb_val val,
311 : void *state)
312 : {
313 1225528 : struct ldb_context *ldb;
314 1225528 : struct ldb_kv_context *ac;
315 1225528 : struct ldb_message *msg;
316 1225528 : struct timeval now;
317 1225528 : int ret, timeval_cmp;
318 1225528 : bool matched;
319 :
320 539853535 : ac = talloc_get_type(state, struct ldb_kv_context);
321 539853535 : ldb = ldb_module_get_ctx(ac->module);
322 :
323 : /*
324 : * We want to skip @ records early in a search full scan
325 : *
326 : * @ records like @IDXLIST are only available via a base
327 : * search on the specific name but the method by which they
328 : * were excluded was expensive, after the unpack the DN is
329 : * exploded and ldb_match_msg_error() would reject it for
330 : * failing to match the scope.
331 : *
332 : * ldb_kv_key_is_normal_record() uses the fact that @ records
333 : * have the DN=@ prefix on their TDB/LMDB key to quickly
334 : * exclude them from consideration.
335 : *
336 : * (any other non-records are also excluded by the same key
337 : * match)
338 : */
339 :
340 539853535 : if (ldb_kv_key_is_normal_record(key) == false) {
341 430880908 : return 0;
342 : }
343 :
344 : /*
345 : * Check the time every 64 records, to reduce calls to
346 : * gettimeofday(). This is a compromise, not all calls to
347 : * ldb_match_message() will take the same time, most will fail
348 : * quickly but by luck it might be possible to have 64 records
349 : * that are slow, doing a recursive search via
350 : * LDAP_MATCHING_RULE_IN_CHAIN.
351 : */
352 108033928 : if (ac->timeout_counter++ % 64 == 0) {
353 1719992 : now = tevent_timeval_current();
354 1719992 : timeval_cmp = tevent_timeval_compare(&ac->timeout_timeval,
355 : &now);
356 :
357 : /*
358 : * The search has taken too long. This is the most
359 : * likely place for our time to expire, as we are in
360 : * an un-indexed search and we return the data from
361 : * within this loop. The tevent based timeout is not
362 : * likely to be hit, sadly.
363 : *
364 : * ldb_match_msg_error() can be quite expensive if a
365 : * LDAP_MATCHING_RULE_IN_CHAIN extended match was
366 : * specified.
367 : */
368 1719992 : if (timeval_cmp <= 0) {
369 5 : ac->error = LDB_ERR_TIME_LIMIT_EXCEEDED;
370 5 : return -1;
371 : }
372 : }
373 :
374 108033923 : msg = ldb_msg_new(ac);
375 108033923 : if (!msg) {
376 0 : ac->error = LDB_ERR_OPERATIONS_ERROR;
377 0 : return -1;
378 : }
379 :
380 : /* unpack the record */
381 108033923 : ret = ldb_unpack_data_flags(ldb, &val, msg,
382 : LDB_UNPACK_DATA_FLAG_NO_VALUES_ALLOC);
383 108033923 : if (ret == -1) {
384 0 : talloc_free(msg);
385 0 : ac->error = LDB_ERR_OPERATIONS_ERROR;
386 0 : return -1;
387 : }
388 :
389 108033923 : if (!msg->dn) {
390 0 : msg->dn = ldb_dn_new(msg, ldb,
391 0 : (char *)key.data + 3);
392 0 : if (msg->dn == NULL) {
393 0 : talloc_free(msg);
394 0 : ac->error = LDB_ERR_OPERATIONS_ERROR;
395 0 : return -1;
396 : }
397 : }
398 :
399 : /*
400 : * The redaction callback may be expensive to call if it fetches a
401 : * security descriptor. Check the DN early and bail out if it doesn't
402 : * match the base.
403 : */
404 108033923 : if (!ldb_match_scope(ldb, ac->base, msg->dn, ac->scope)) {
405 93044855 : talloc_free(msg);
406 93044855 : return 0;
407 : }
408 :
409 14989068 : if (ldb->redact.callback != NULL) {
410 14919814 : ret = ldb->redact.callback(ldb->redact.module, ac->req, msg);
411 14919814 : if (ret != LDB_SUCCESS) {
412 0 : talloc_free(msg);
413 0 : return ret;
414 : }
415 : }
416 :
417 : /* see if it matches the given expression */
418 14989068 : ret = ldb_match_message(ldb, msg,
419 : ac->tree, ac->scope, &matched);
420 14989068 : if (ret != LDB_SUCCESS) {
421 23 : talloc_free(msg);
422 23 : ac->error = LDB_ERR_OPERATIONS_ERROR;
423 23 : return -1;
424 : }
425 14989045 : if (!matched) {
426 11134909 : talloc_free(msg);
427 11134909 : return 0;
428 : }
429 :
430 3854136 : ret = ldb_msg_add_distinguished_name(msg);
431 3854136 : if (ret == -1) {
432 0 : talloc_free(msg);
433 0 : return LDB_ERR_OPERATIONS_ERROR;
434 : }
435 :
436 : /* filter the attributes that the user wants */
437 3854136 : ret = ldb_kv_filter_attrs_in_place(msg, ac->attrs);
438 3854136 : if (ret != LDB_SUCCESS) {
439 0 : talloc_free(msg);
440 0 : ac->error = LDB_ERR_OPERATIONS_ERROR;
441 0 : return -1;
442 : }
443 :
444 3854136 : ldb_msg_shrink_to_fit(msg);
445 :
446 : /* Ensure the message elements are all talloc'd. */
447 3854136 : ret = ldb_msg_elements_take_ownership(msg);
448 3854136 : if (ret != LDB_SUCCESS) {
449 0 : talloc_free(msg);
450 0 : ac->error = LDB_ERR_OPERATIONS_ERROR;
451 0 : return -1;
452 : }
453 :
454 3854136 : ret = ldb_module_send_entry(ac->req, msg, NULL);
455 3854136 : if (ret != LDB_SUCCESS) {
456 5 : ac->request_terminated = true;
457 : /* the callback failed, abort the operation */
458 5 : ac->error = LDB_ERR_OPERATIONS_ERROR;
459 5 : return -1;
460 : }
461 :
462 3608673 : return 0;
463 : }
464 :
465 : /*
466 : * Key pointing to just before the first GUID indexed record for
467 : * iterate_range
468 : */
469 : struct ldb_val start_of_db_key = {.data=discard_const_p(uint8_t, "GUID<"),
470 : .length=6};
471 : /*
472 : * Key pointing to just after the last GUID indexed record for
473 : * iterate_range
474 : */
475 : struct ldb_val end_of_db_key = {.data=discard_const_p(uint8_t, "GUID>"),
476 : .length=6};
477 :
478 : /*
479 : search the database with a LDAP-like expression.
480 : this is the "full search" non-indexed variant
481 : */
482 60216 : static int ldb_kv_search_full(struct ldb_kv_context *ctx)
483 : {
484 60216 : void *data = ldb_module_get_private(ctx->module);
485 1169 : struct ldb_kv_private *ldb_kv =
486 60216 : talloc_get_type(data, struct ldb_kv_private);
487 1169 : int ret;
488 :
489 : /*
490 : * If the backend has an iterate_range op, use it to start the search
491 : * at the first GUID indexed record, skipping the indexes section.
492 : */
493 60216 : ctx->error = LDB_SUCCESS;
494 60216 : ret = ldb_kv->kv_ops->iterate_range(ldb_kv,
495 : start_of_db_key,
496 : end_of_db_key,
497 : search_func,
498 : ctx);
499 60216 : if (ret == LDB_ERR_OPERATIONS_ERROR) {
500 : /*
501 : * If iterate_range isn't defined, it'll return an error,
502 : * so just iterate over the whole DB.
503 : */
504 47366 : ret = ldb_kv->kv_ops->iterate(ldb_kv, search_func, ctx);
505 : }
506 :
507 60216 : if (ret < 0) {
508 0 : return LDB_ERR_OPERATIONS_ERROR;
509 : }
510 :
511 60216 : return ctx->error;
512 : }
513 :
514 33595129 : static int ldb_kv_search_and_return_base(struct ldb_kv_private *ldb_kv,
515 : struct ldb_kv_context *ctx)
516 : {
517 1927675 : struct ldb_message *msg;
518 33595129 : struct ldb_context *ldb = ldb_module_get_ctx(ctx->module);
519 1927675 : const char *dn_linearized;
520 1927675 : const char *msg_dn_linearized;
521 1927675 : int ret;
522 1927675 : bool matched;
523 :
524 33595129 : msg = ldb_msg_new(ctx);
525 33595129 : if (!msg) {
526 0 : return LDB_ERR_OPERATIONS_ERROR;
527 : }
528 33595129 : ret = ldb_kv_search_dn1(ctx->module,
529 : ctx->base,
530 : msg,
531 : LDB_UNPACK_DATA_FLAG_NO_VALUES_ALLOC |
532 : LDB_UNPACK_DATA_FLAG_READ_LOCKED);
533 :
534 33595129 : if (ret == LDB_ERR_NO_SUCH_OBJECT) {
535 2260888 : if (ldb_kv->check_base == false) {
536 : /*
537 : * In this case, we are done, as no base
538 : * checking is allowed in this DB
539 : */
540 83800 : talloc_free(msg);
541 83800 : return LDB_SUCCESS;
542 : }
543 2177088 : ldb_asprintf_errstring(ldb,
544 : "No such Base DN: %s",
545 : ldb_dn_get_linearized(ctx->base));
546 : }
547 33511329 : if (ret != LDB_SUCCESS) {
548 2177088 : talloc_free(msg);
549 2177088 : return ret;
550 : }
551 :
552 31334241 : if (ldb->redact.callback != NULL) {
553 28997603 : ret = ldb->redact.callback(ldb->redact.module, ctx->req, msg);
554 28997603 : if (ret != LDB_SUCCESS) {
555 0 : talloc_free(msg);
556 0 : return ret;
557 : }
558 : }
559 :
560 : /*
561 : * We use this, not ldb_match_msg_error() as we know
562 : * we matched on the scope BASE, as we just fetched
563 : * the base DN
564 : */
565 :
566 31334241 : ret = ldb_match_message(ldb, msg,
567 : ctx->tree,
568 : ctx->scope,
569 : &matched);
570 31334241 : if (ret != LDB_SUCCESS) {
571 0 : talloc_free(msg);
572 0 : return ret;
573 : }
574 31334241 : if (!matched) {
575 724558 : talloc_free(msg);
576 724558 : return LDB_SUCCESS;
577 : }
578 :
579 30609683 : dn_linearized = ldb_dn_get_linearized(ctx->base);
580 30609683 : msg_dn_linearized = ldb_dn_get_linearized(msg->dn);
581 :
582 30609683 : if (strcmp(dn_linearized, msg_dn_linearized) == 0) {
583 : /*
584 : * If the DN is exactly the same string, then
585 : * re-use the full incoming DN for the
586 : * returned result, as it has already been
587 : * casefolded
588 : */
589 29269651 : struct ldb_dn *dn = ldb_dn_copy(msg, ctx->base);
590 29269651 : if (dn != NULL) {
591 29269651 : msg->dn = dn;
592 : }
593 : }
594 :
595 30609683 : ret = ldb_msg_add_distinguished_name(msg);
596 30609683 : if (ret == -1) {
597 0 : talloc_free(msg);
598 0 : return LDB_ERR_OPERATIONS_ERROR;
599 : }
600 :
601 : /*
602 : * filter the attributes that the user wants.
603 : */
604 30609683 : ret = ldb_kv_filter_attrs_in_place(msg, ctx->attrs);
605 30609683 : if (ret != LDB_SUCCESS) {
606 0 : talloc_free(msg);
607 0 : return LDB_ERR_OPERATIONS_ERROR;
608 : }
609 :
610 30609683 : ldb_msg_shrink_to_fit(msg);
611 :
612 : /* Ensure the message elements are all talloc'd. */
613 30609683 : ret = ldb_msg_elements_take_ownership(msg);
614 30609683 : if (ret != LDB_SUCCESS) {
615 0 : talloc_free(msg);
616 0 : return LDB_ERR_OPERATIONS_ERROR;
617 : }
618 :
619 : /*
620 : * Remove any extended components, we just want the casefold components
621 : */
622 30609683 : ldb_dn_remove_extended_components(msg->dn);
623 :
624 30609683 : ret = ldb_module_send_entry(ctx->req, msg, NULL);
625 30609683 : if (ret != LDB_SUCCESS) {
626 : /* Regardless of success or failure, the msg
627 : * is the callbacks responsibility, and should
628 : * not be talloc_free()'ed */
629 29 : ctx->request_terminated = true;
630 29 : return ret;
631 : }
632 :
633 29052470 : return LDB_SUCCESS;
634 : }
635 :
636 : /*
637 : search the database with a LDAP-like expression.
638 : choses a search method
639 : */
640 129793991 : int ldb_kv_search(struct ldb_kv_context *ctx)
641 : {
642 4274754 : struct ldb_context *ldb;
643 129793991 : struct ldb_module *module = ctx->module;
644 129793991 : struct ldb_request *req = ctx->req;
645 129793991 : void *data = ldb_module_get_private(module);
646 4274754 : struct ldb_kv_private *ldb_kv =
647 129793991 : talloc_get_type(data, struct ldb_kv_private);
648 4274754 : int ret;
649 :
650 129793991 : ldb = ldb_module_get_ctx(module);
651 :
652 129793991 : ldb_request_set_state(req, LDB_ASYNC_PENDING);
653 :
654 129793991 : if (ldb_kv->kv_ops->lock_read(module) != 0) {
655 0 : return LDB_ERR_OPERATIONS_ERROR;
656 : }
657 :
658 129793991 : if (ldb_kv_cache_load(module) != 0) {
659 0 : ldb_kv->kv_ops->unlock_read(module);
660 0 : return LDB_ERR_OPERATIONS_ERROR;
661 : }
662 :
663 129793991 : if (req->op.search.tree == NULL) {
664 0 : ldb_kv->kv_ops->unlock_read(module);
665 0 : return LDB_ERR_OPERATIONS_ERROR;
666 : }
667 :
668 129793991 : ctx->tree = req->op.search.tree;
669 129793991 : ctx->scope = req->op.search.scope;
670 129793991 : ctx->base = req->op.search.base;
671 129793991 : ctx->attrs = req->op.search.attrs;
672 :
673 129793991 : if ((req->op.search.base == NULL) || (ldb_dn_is_null(req->op.search.base) == true)) {
674 :
675 : /* Check what we should do with a NULL dn */
676 820362 : switch (req->op.search.scope) {
677 134935 : case LDB_SCOPE_BASE:
678 134935 : ldb_asprintf_errstring(ldb,
679 : "NULL Base DN invalid for a base search");
680 134935 : ret = LDB_ERR_INVALID_DN_SYNTAX;
681 134935 : break;
682 1 : case LDB_SCOPE_ONELEVEL:
683 1 : ldb_asprintf_errstring(ldb,
684 : "NULL Base DN invalid for a one-level search");
685 1 : ret = LDB_ERR_INVALID_DN_SYNTAX;
686 1 : break;
687 615648 : case LDB_SCOPE_SUBTREE:
688 : default:
689 : /* We accept subtree searches from a NULL base DN, ie over the whole DB */
690 615648 : ret = LDB_SUCCESS;
691 : }
692 128973629 : } else if (req->op.search.scope == LDB_SCOPE_BASE) {
693 :
694 : /*
695 : * If we are LDB_SCOPE_BASE, do just one search and
696 : * return early. This is critical to ensure we do not
697 : * go into the index code for special DNs, as that
698 : * will try to look up an index record for a special
699 : * record (which doesn't exist).
700 : */
701 33595129 : ret = ldb_kv_search_and_return_base(ldb_kv, ctx);
702 :
703 33595129 : ldb_kv->kv_ops->unlock_read(module);
704 :
705 33595129 : return ret;
706 :
707 95378500 : } else if (ldb_kv->check_base) {
708 : /*
709 : * This database has been marked as
710 : * 'checkBaseOnSearch', so do a spot check of the base
711 : * dn. Also optimise the subsequent filter by filling
712 : * in the ctx->base to be exactly case correct
713 : */
714 95297588 : ret = ldb_kv_search_base(
715 : module, ctx, req->op.search.base, &ctx->base);
716 :
717 95297588 : if (ret == LDB_ERR_NO_SUCH_OBJECT) {
718 952 : ldb_asprintf_errstring(ldb,
719 : "No such Base DN: %s",
720 : ldb_dn_get_linearized(req->op.search.base));
721 : }
722 :
723 80912 : } else if (ldb_dn_validate(req->op.search.base) == false) {
724 :
725 : /* We don't want invalid base DNs here */
726 0 : ldb_asprintf_errstring(ldb,
727 : "Invalid Base DN: %s",
728 : ldb_dn_get_linearized(req->op.search.base));
729 0 : ret = LDB_ERR_INVALID_DN_SYNTAX;
730 :
731 : } else {
732 : /* If we are not checking the base DN life is easy */
733 77154 : ret = LDB_SUCCESS;
734 : }
735 :
736 96125326 : if (ret == LDB_SUCCESS) {
737 96062974 : uint32_t match_count = 0;
738 :
739 96062974 : ret = ldb_kv_search_indexed(ctx, &match_count);
740 96062974 : if (ret == LDB_ERR_NO_SUCH_OBJECT) {
741 : /* Not in the index, therefore OK! */
742 8152938 : ret = LDB_SUCCESS;
743 :
744 : }
745 : /* Check if we got just a normal error.
746 : * In that case proceed to a full search unless we got a
747 : * callback error */
748 96062974 : if (!ctx->request_terminated && ret != LDB_SUCCESS) {
749 : /* Not indexed, so we need to do a full scan */
750 60240 : if (ldb_kv->warn_unindexed ||
751 60240 : ldb_kv->disable_full_db_scan) {
752 : /* useful for debugging when slow performance
753 : * is caused by unindexed searches */
754 24 : char *expression = ldb_filter_from_tree(ctx, ctx->tree);
755 48 : ldb_debug(ldb, LDB_DEBUG_ERROR, "ldb FULL SEARCH: %s SCOPE: %s DN: %s",
756 : expression,
757 24 : req->op.search.scope==LDB_SCOPE_BASE?"base":
758 40 : req->op.search.scope==LDB_SCOPE_ONELEVEL?"one":
759 16 : req->op.search.scope==LDB_SCOPE_SUBTREE?"sub":"UNKNOWN",
760 : ldb_dn_get_linearized(req->op.search.base));
761 :
762 24 : talloc_free(expression);
763 : }
764 :
765 60240 : if (match_count != 0) {
766 : /* the indexing code gave an error
767 : * after having returned at least one
768 : * entry. This means the indexes are
769 : * corrupt or a database record is
770 : * corrupt. We cannot continue with a
771 : * full search or we may return
772 : * duplicate entries
773 : */
774 0 : ldb_kv->kv_ops->unlock_read(module);
775 24 : return LDB_ERR_OPERATIONS_ERROR;
776 : }
777 :
778 60240 : if (ldb_kv->disable_full_db_scan) {
779 24 : ldb_set_errstring(ldb,
780 : "ldb FULL SEARCH disabled");
781 24 : ldb_kv->kv_ops->unlock_read(module);
782 24 : return LDB_ERR_INAPPROPRIATE_MATCHING;
783 : }
784 :
785 60216 : ret = ldb_kv_search_full(ctx);
786 60216 : if (ret != LDB_SUCCESS) {
787 33 : ldb_set_errstring(ldb, "Indexed and full searches both failed!\n");
788 : }
789 : }
790 : }
791 :
792 96198838 : ldb_kv->kv_ops->unlock_read(module);
793 :
794 96198838 : return ret;
795 : }
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