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ctdb-tests: Add explicit wait to the fork_helper()
[Samba.git] / source3 / smbd / smbXsrv_tcon.c
blobddd03f610906598e3ff794fa7fa0a7e05f11e046
1 /*
2 Unix SMB/CIFS implementation.
3
4 Copyright (C) Stefan Metzmacher 2011-2012
5 Copyright (C) Michael Adam 2012
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "includes.h"
22 #include "system/filesys.h"
23 #include "smbd/smbd.h"
24 #include "smbd/globals.h"
25 #include "dbwrap/dbwrap.h"
26 #include "dbwrap/dbwrap_rbt.h"
27 #include "dbwrap/dbwrap_open.h"
28 #include "messages.h"
29 #include "lib/util/util_tdb.h"
30 #include "librpc/gen_ndr/ndr_smbXsrv.h"
31 #include "serverid.h"
32
33 struct smbXsrv_tcon_table {
34 struct {
35 struct db_context *db_ctx;
36 uint32_t lowest_id;
37 uint32_t highest_id;
38 uint32_t max_tcons;
39 uint32_t num_tcons;
40 } local;
41 struct {
42 struct db_context *db_ctx;
43 } global;
44 };
45
46 static struct db_context *smbXsrv_tcon_global_db_ctx = NULL;
47
48 NTSTATUS smbXsrv_tcon_global_init(void)
49 {
50 char *global_path = NULL;
51 struct db_context *db_ctx = NULL;
52
53 if (smbXsrv_tcon_global_db_ctx != NULL) {
54 return NT_STATUS_OK;
55 }
56
57 global_path = lock_path("smbXsrv_tcon_global.tdb");
58 if (global_path == NULL) {
59 return NT_STATUS_NO_MEMORY;
60 }
61
62 db_ctx = db_open(NULL, global_path,
63 0, /* hash_size */
64 TDB_DEFAULT |
65 TDB_CLEAR_IF_FIRST |
66 TDB_INCOMPATIBLE_HASH,
67 O_RDWR | O_CREAT, 0600,
68 DBWRAP_LOCK_ORDER_1,
69 DBWRAP_FLAG_NONE);
70 TALLOC_FREE(global_path);
71 if (db_ctx == NULL) {
72 NTSTATUS status;
73
74 status = map_nt_error_from_unix_common(errno);
75
76 return status;
77 }
78
79 smbXsrv_tcon_global_db_ctx = db_ctx;
80
81 return NT_STATUS_OK;
82 }
83
84 /*
85 * NOTE:
86 * We need to store the keys in big endian so that dbwrap_rbt's memcmp
87 * has the same result as integer comparison between the uint32_t
88 * values.
89 *
90 * TODO: implement string based key
91 */
92
93 #define SMBXSRV_TCON_GLOBAL_TDB_KEY_SIZE sizeof(uint32_t)
94
95 static TDB_DATA smbXsrv_tcon_global_id_to_key(uint32_t id,
96 uint8_t *key_buf)
97 {
98 TDB_DATA key;
99
100 RSIVAL(key_buf, 0, id);
101
102 key = make_tdb_data(key_buf, SMBXSRV_TCON_GLOBAL_TDB_KEY_SIZE);
103
104 return key;
105 }
106
107 #if 0
108 static NTSTATUS smbXsrv_tcon_global_key_to_id(TDB_DATA key, uint32_t *id)
109 {
110 if (id == NULL) {
111 return NT_STATUS_INVALID_PARAMETER;
112 }
113
114 if (key.dsize != SMBXSRV_TCON_GLOBAL_TDB_KEY_SIZE) {
115 return NT_STATUS_INTERNAL_DB_CORRUPTION;
116 }
117
118 *id = RIVAL(key.dptr, 0);
119
120 return NT_STATUS_OK;
121 }
122 #endif
123
124 #define SMBXSRV_TCON_LOCAL_TDB_KEY_SIZE sizeof(uint32_t)
125
126 static TDB_DATA smbXsrv_tcon_local_id_to_key(uint32_t id,
127 uint8_t *key_buf)
128 {
129 TDB_DATA key;
130
131 RSIVAL(key_buf, 0, id);
132
133 key = make_tdb_data(key_buf, SMBXSRV_TCON_LOCAL_TDB_KEY_SIZE);
134
135 return key;
136 }
137
138 static NTSTATUS smbXsrv_tcon_local_key_to_id(TDB_DATA key, uint32_t *id)
139 {
140 if (id == NULL) {
141 return NT_STATUS_INVALID_PARAMETER;
142 }
143
144 if (key.dsize != SMBXSRV_TCON_LOCAL_TDB_KEY_SIZE) {
145 return NT_STATUS_INTERNAL_DB_CORRUPTION;
146 }
147
148 *id = RIVAL(key.dptr, 0);
149
150 return NT_STATUS_OK;
151 }
152
153 static struct db_record *smbXsrv_tcon_global_fetch_locked(
154 struct db_context *db,
155 uint32_t id,
156 TALLOC_CTX *mem_ctx)
157 {
158 TDB_DATA key;
159 uint8_t key_buf[SMBXSRV_TCON_GLOBAL_TDB_KEY_SIZE];
160 struct db_record *rec = NULL;
161
162 key = smbXsrv_tcon_global_id_to_key(id, key_buf);
163
164 rec = dbwrap_fetch_locked(db, mem_ctx, key);
165
166 if (rec == NULL) {
167 DBG_DEBUG("Failed to lock global id 0x%08x, key '%s'\n", id,
168 hex_encode_talloc(talloc_tos(), key.dptr, key.dsize));
169 }
170
171 return rec;
172 }
173
174 static struct db_record *smbXsrv_tcon_local_fetch_locked(
175 struct db_context *db,
176 uint32_t id,
177 TALLOC_CTX *mem_ctx)
178 {
179 TDB_DATA key;
180 uint8_t key_buf[SMBXSRV_TCON_LOCAL_TDB_KEY_SIZE];
181 struct db_record *rec = NULL;
182
183 key = smbXsrv_tcon_local_id_to_key(id, key_buf);
184
185 rec = dbwrap_fetch_locked(db, mem_ctx, key);
186
187 if (rec == NULL) {
188 DBG_DEBUG("Failed to lock local id 0x%08x, key '%s'\n", id,
189 hex_encode_talloc(talloc_tos(), key.dptr, key.dsize));
190 }
191
192 return rec;
193 }
194
195 static NTSTATUS smbXsrv_tcon_table_init(TALLOC_CTX *mem_ctx,
196 struct smbXsrv_tcon_table *table,
197 uint32_t lowest_id,
198 uint32_t highest_id,
199 uint32_t max_tcons)
200 {
201 NTSTATUS status;
202 uint64_t max_range;
203
204 if (lowest_id > highest_id) {
205 return NT_STATUS_INTERNAL_ERROR;
206 }
207
208 max_range = highest_id;
209 max_range -= lowest_id;
210 max_range += 1;
211
212 if (max_tcons > max_range) {
213 return NT_STATUS_INTERNAL_ERROR;
214 }
215
216 ZERO_STRUCTP(table);
217 table->local.db_ctx = db_open_rbt(table);
218 if (table->local.db_ctx == NULL) {
219 return NT_STATUS_NO_MEMORY;
220 }
221 table->local.lowest_id = lowest_id;
222 table->local.highest_id = highest_id;
223 table->local.max_tcons = max_tcons;
224
225 status = smbXsrv_tcon_global_init();
226 if (!NT_STATUS_IS_OK(status)) {
227 return status;
228 }
229
230 table->global.db_ctx = smbXsrv_tcon_global_db_ctx;
231
232 return NT_STATUS_OK;
233 }
234
235 struct smb1srv_tcon_local_allocate_state {
236 const uint32_t lowest_id;
237 const uint32_t highest_id;
238 uint32_t last_id;
239 uint32_t useable_id;
240 NTSTATUS status;
241 };
242
243 static int smb1srv_tcon_local_allocate_traverse(struct db_record *rec,
244 void *private_data)
245 {
246 struct smb1srv_tcon_local_allocate_state *state =
247 (struct smb1srv_tcon_local_allocate_state *)private_data;
248 TDB_DATA key = dbwrap_record_get_key(rec);
249 uint32_t id = 0;
250 NTSTATUS status;
251
252 status = smbXsrv_tcon_local_key_to_id(key, &id);
253 if (!NT_STATUS_IS_OK(status)) {
254 state->status = status;
255 return -1;
256 }
257
258 if (id <= state->last_id) {
259 state->status = NT_STATUS_INTERNAL_DB_CORRUPTION;
260 return -1;
261 }
262 state->last_id = id;
263
264 if (id > state->useable_id) {
265 state->status = NT_STATUS_OK;
266 return -1;
267 }
268
269 if (state->useable_id == state->highest_id) {
270 state->status = NT_STATUS_INSUFFICIENT_RESOURCES;
271 return -1;
272 }
273
274 state->useable_id +=1;
275 return 0;
276 }
277
278 static NTSTATUS smb1srv_tcon_local_allocate_id(struct db_context *db,
279 uint32_t lowest_id,
280 uint32_t highest_id,
281 TALLOC_CTX *mem_ctx,
282 struct db_record **_rec,
283 uint32_t *_id)
284 {
285 struct smb1srv_tcon_local_allocate_state state = {
286 .lowest_id = lowest_id,
287 .highest_id = highest_id,
288 .last_id = 0,
289 .useable_id = lowest_id,
290 .status = NT_STATUS_INTERNAL_ERROR,
291 };
292 uint32_t i;
293 uint32_t range;
294 NTSTATUS status;
295 int count = 0;
296
297 *_rec = NULL;
298 *_id = 0;
299
300 if (lowest_id > highest_id) {
301 return NT_STATUS_INSUFFICIENT_RESOURCES;
302 }
303
304 /*
305 * first we try randomly
306 */
307 range = (highest_id - lowest_id) + 1;
308
309 for (i = 0; i < (range / 2); i++) {
310 uint32_t id;
311 TDB_DATA val;
312 struct db_record *rec = NULL;
313
314 id = generate_random() % range;
315 id += lowest_id;
316
317 if (id < lowest_id) {
318 id = lowest_id;
319 }
320 if (id > highest_id) {
321 id = highest_id;
322 }
323
324 rec = smbXsrv_tcon_local_fetch_locked(db, id, mem_ctx);
325 if (rec == NULL) {
326 return NT_STATUS_INSUFFICIENT_RESOURCES;
327 }
328
329 val = dbwrap_record_get_value(rec);
330 if (val.dsize != 0) {
331 TALLOC_FREE(rec);
332 continue;
333 }
334
335 *_rec = rec;
336 *_id = id;
337 return NT_STATUS_OK;
338 }
339
340 /*
341 * if the range is almost full,
342 * we traverse the whole table
343 * (this relies on sorted behavior of dbwrap_rbt)
344 */
345 status = dbwrap_traverse_read(db, smb1srv_tcon_local_allocate_traverse,
346 &state, &count);
347 if (NT_STATUS_IS_OK(status)) {
348 if (NT_STATUS_IS_OK(state.status)) {
349 return NT_STATUS_INTERNAL_ERROR;
350 }
351
352 if (!NT_STATUS_EQUAL(state.status, NT_STATUS_INTERNAL_ERROR)) {
353 return state.status;
354 }
355
356 if (state.useable_id <= state.highest_id) {
357 state.status = NT_STATUS_OK;
358 } else {
359 return NT_STATUS_INSUFFICIENT_RESOURCES;
360 }
361 } else if (!NT_STATUS_EQUAL(status, NT_STATUS_INTERNAL_DB_CORRUPTION)) {
362 /*
363 * Here we really expect NT_STATUS_INTERNAL_DB_CORRUPTION!
364 *
365 * If we get anything else it is an error, because it
366 * means we did not manage to find a free slot in
367 * the db.
368 */
369 return NT_STATUS_INSUFFICIENT_RESOURCES;
370 }
371
372 if (NT_STATUS_IS_OK(state.status)) {
373 uint32_t id;
374 TDB_DATA val;
375 struct db_record *rec = NULL;
376
377 id = state.useable_id;
378
379 rec = smbXsrv_tcon_local_fetch_locked(db, id, mem_ctx);
380 if (rec == NULL) {
381 return NT_STATUS_INSUFFICIENT_RESOURCES;
382 }
383
384 val = dbwrap_record_get_value(rec);
385 if (val.dsize != 0) {
386 TALLOC_FREE(rec);
387 return NT_STATUS_INTERNAL_DB_CORRUPTION;
388 }
389
390 *_rec = rec;
391 *_id = id;
392 return NT_STATUS_OK;
393 }
394
395 return state.status;
396 }
397
398 struct smbXsrv_tcon_local_fetch_state {
399 struct smbXsrv_tcon *tcon;
400 NTSTATUS status;
401 };
402
403 static void smbXsrv_tcon_local_fetch_parser(TDB_DATA key, TDB_DATA data,
404 void *private_data)
405 {
406 struct smbXsrv_tcon_local_fetch_state *state =
407 (struct smbXsrv_tcon_local_fetch_state *)private_data;
408 void *ptr;
409
410 if (data.dsize != sizeof(ptr)) {
411 state->status = NT_STATUS_INTERNAL_DB_ERROR;
412 return;
413 }
414
415 memcpy(&ptr, data.dptr, data.dsize);
416 state->tcon = talloc_get_type_abort(ptr, struct smbXsrv_tcon);
417 state->status = NT_STATUS_OK;
418 }
419
420 static NTSTATUS smbXsrv_tcon_local_lookup(struct smbXsrv_tcon_table *table,
421 uint32_t tcon_local_id,
422 NTTIME now,
423 struct smbXsrv_tcon **_tcon)
424 {
425 struct smbXsrv_tcon_local_fetch_state state = {
426 .tcon = NULL,
427 .status = NT_STATUS_INTERNAL_ERROR,
428 };
429 uint8_t key_buf[SMBXSRV_TCON_LOCAL_TDB_KEY_SIZE];
430 TDB_DATA key;
431 NTSTATUS status;
432
433 *_tcon = NULL;
434
435 if (tcon_local_id == 0) {
436 return NT_STATUS_NETWORK_NAME_DELETED;
437 }
438
439 if (table == NULL) {
440 /* this might happen before the end of negprot */
441 return NT_STATUS_NETWORK_NAME_DELETED;
442 }
443
444 if (table->local.db_ctx == NULL) {
445 return NT_STATUS_INTERNAL_ERROR;
446 }
447
448 key = smbXsrv_tcon_local_id_to_key(tcon_local_id, key_buf);
449
450 status = dbwrap_parse_record(table->local.db_ctx, key,
451 smbXsrv_tcon_local_fetch_parser,
452 &state);
453 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
454 return NT_STATUS_NETWORK_NAME_DELETED;
455 } else if (!NT_STATUS_IS_OK(status)) {
456 return status;
457 }
458 if (!NT_STATUS_IS_OK(state.status)) {
459 return state.status;
460 }
461
462 if (NT_STATUS_EQUAL(state.tcon->status, NT_STATUS_NETWORK_NAME_DELETED)) {
463 return NT_STATUS_NETWORK_NAME_DELETED;
464 }
465
466 state.tcon->idle_time = now;
467
468 *_tcon = state.tcon;
469 return state.tcon->status;
470 }
471
472 static int smbXsrv_tcon_global_destructor(struct smbXsrv_tcon_global0 *global)
473 {
474 return 0;
475 }
476
477 static void smbXsrv_tcon_global_verify_record(struct db_record *db_rec,
478 bool *is_free,
479 bool *was_free,
480 TALLOC_CTX *mem_ctx,
481 struct smbXsrv_tcon_global0 **_g);
482
483 static NTSTATUS smbXsrv_tcon_global_allocate(struct db_context *db,
484 TALLOC_CTX *mem_ctx,
485 struct smbXsrv_tcon_global0 **_global)
486 {
487 uint32_t i;
488 struct smbXsrv_tcon_global0 *global = NULL;
489 uint32_t last_free = 0;
490 const uint32_t min_tries = 3;
491
492 *_global = NULL;
493
494 global = talloc_zero(mem_ctx, struct smbXsrv_tcon_global0);
495 if (global == NULL) {
496 return NT_STATUS_NO_MEMORY;
497 }
498 talloc_set_destructor(global, smbXsrv_tcon_global_destructor);
499
500 /*
501 * Here we just randomly try the whole 32-bit space
502 *
503 * We use just 32-bit, because we want to reuse the
504 * ID for SRVSVC.
505 */
506 for (i = 0; i < UINT32_MAX; i++) {
507 bool is_free = false;
508 bool was_free = false;
509 uint32_t id;
510
511 if (i >= min_tries && last_free != 0) {
512 id = last_free;
513 } else {
514 id = generate_random();
515 }
516 if (id == 0) {
517 id++;
518 }
519 if (id == UINT32_MAX) {
520 id--;
521 }
522
523 global->db_rec = smbXsrv_tcon_global_fetch_locked(db, id,
524 mem_ctx);
525 if (global->db_rec == NULL) {
526 talloc_free(global);
527 return NT_STATUS_INSUFFICIENT_RESOURCES;
528 }
529
530 smbXsrv_tcon_global_verify_record(global->db_rec,
531 &is_free,
532 &was_free,
533 NULL, NULL);
534
535 if (!is_free) {
536 TALLOC_FREE(global->db_rec);
537 continue;
538 }
539
540 if (!was_free && i < min_tries) {
541 /*
542 * The session_id is free now,
543 * but was not free before.
544 *
545 * This happens if a smbd crashed
546 * and did not cleanup the record.
547 *
548 * If this is one of our first tries,
549 * then we try to find a real free one.
550 */
551 if (last_free == 0) {
552 last_free = id;
553 }
554 TALLOC_FREE(global->db_rec);
555 continue;
556 }
557
558 global->tcon_global_id = id;
559
560 *_global = global;
561 return NT_STATUS_OK;
562 }
563
564 /* should not be reached */
565 talloc_free(global);
566 return NT_STATUS_INTERNAL_ERROR;
567 }
568
569 static void smbXsrv_tcon_global_verify_record(struct db_record *db_rec,
570 bool *is_free,
571 bool *was_free,
572 TALLOC_CTX *mem_ctx,
573 struct smbXsrv_tcon_global0 **_g)
574 {
575 TDB_DATA key;
576 TDB_DATA val;
577 DATA_BLOB blob;
578 struct smbXsrv_tcon_globalB global_blob;
579 enum ndr_err_code ndr_err;
580 struct smbXsrv_tcon_global0 *global = NULL;
581 bool exists;
582 TALLOC_CTX *frame = talloc_stackframe();
583
584 *is_free = false;
585
586 if (was_free) {
587 *was_free = false;
588 }
589 if (_g) {
590 *_g = NULL;
591 }
592
593 key = dbwrap_record_get_key(db_rec);
594
595 val = dbwrap_record_get_value(db_rec);
596 if (val.dsize == 0) {
597 TALLOC_FREE(frame);
598 *is_free = true;
599 if (was_free) {
600 *was_free = true;
601 }
602 return;
603 }
604
605 blob = data_blob_const(val.dptr, val.dsize);
606
607 ndr_err = ndr_pull_struct_blob(&blob, frame, &global_blob,
608 (ndr_pull_flags_fn_t)ndr_pull_smbXsrv_tcon_globalB);
609 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
610 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
611 DEBUG(1,("smbXsrv_tcon_global_verify_record: "
612 "key '%s' ndr_pull_struct_blob - %s\n",
613 hex_encode_talloc(frame, key.dptr, key.dsize),
614 nt_errstr(status)));
615 TALLOC_FREE(frame);
616 return;
617 }
618
619 DEBUG(10,("smbXsrv_tcon_global_verify_record\n"));
620 if (DEBUGLVL(10)) {
621 NDR_PRINT_DEBUG(smbXsrv_tcon_globalB, &global_blob);
622 }
623
624 if (global_blob.version != SMBXSRV_VERSION_0) {
625 DEBUG(0,("smbXsrv_tcon_global_verify_record: "
626 "key '%s' use unsupported version %u\n",
627 hex_encode_talloc(frame, key.dptr, key.dsize),
628 global_blob.version));
629 NDR_PRINT_DEBUG(smbXsrv_tcon_globalB, &global_blob);
630 TALLOC_FREE(frame);
631 return;
632 }
633
634 global = global_blob.info.info0;
635
636 exists = serverid_exists(&global->server_id);
637 if (!exists) {
638 struct server_id_buf idbuf;
639 DEBUG(2,("smbXsrv_tcon_global_verify_record: "
640 "key '%s' server_id %s does not exist.\n",
641 hex_encode_talloc(frame, key.dptr, key.dsize),
642 server_id_str_buf(global->server_id, &idbuf)));
643 if (DEBUGLVL(2)) {
644 NDR_PRINT_DEBUG(smbXsrv_tcon_globalB, &global_blob);
645 }
646 TALLOC_FREE(frame);
647 dbwrap_record_delete(db_rec);
648 *is_free = true;
649 return;
650 }
651
652 if (_g) {
653 *_g = talloc_move(mem_ctx, &global);
654 }
655 TALLOC_FREE(frame);
656 }
657
658 static NTSTATUS smbXsrv_tcon_global_store(struct smbXsrv_tcon_global0 *global)
659 {
660 struct smbXsrv_tcon_globalB global_blob;
661 DATA_BLOB blob = data_blob_null;
662 TDB_DATA key;
663 TDB_DATA val;
664 NTSTATUS status;
665 enum ndr_err_code ndr_err;
666
667 /*
668 * TODO: if we use other versions than '0'
669 * we would add glue code here, that would be able to
670 * store the information in the old format.
671 */
672
673 if (global->db_rec == NULL) {
674 return NT_STATUS_INTERNAL_ERROR;
675 }
676
677 key = dbwrap_record_get_key(global->db_rec);
678 val = dbwrap_record_get_value(global->db_rec);
679
680 ZERO_STRUCT(global_blob);
681 global_blob.version = smbXsrv_version_global_current();
682 if (val.dsize >= 8) {
683 global_blob.seqnum = IVAL(val.dptr, 4);
684 }
685 global_blob.seqnum += 1;
686 global_blob.info.info0 = global;
687
688 ndr_err = ndr_push_struct_blob(&blob, global->db_rec, &global_blob,
689 (ndr_push_flags_fn_t)ndr_push_smbXsrv_tcon_globalB);
690 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
691 status = ndr_map_error2ntstatus(ndr_err);
692 DEBUG(1,("smbXsrv_tcon_global_store: key '%s' ndr_push - %s\n",
693 hex_encode_talloc(global->db_rec, key.dptr, key.dsize),
694 nt_errstr(status)));
695 TALLOC_FREE(global->db_rec);
696 return status;
697 }
698
699 val = make_tdb_data(blob.data, blob.length);
700 status = dbwrap_record_store(global->db_rec, val, TDB_REPLACE);
701 if (!NT_STATUS_IS_OK(status)) {
702 DEBUG(1,("smbXsrv_tcon_global_store: key '%s' store - %s\n",
703 hex_encode_talloc(global->db_rec, key.dptr, key.dsize),
704 nt_errstr(status)));
705 TALLOC_FREE(global->db_rec);
706 return status;
707 }
708
709 if (DEBUGLVL(10)) {
710 DEBUG(10,("smbXsrv_tcon_global_store: key '%s' stored\n",
711 hex_encode_talloc(global->db_rec, key.dptr, key.dsize)));
712 NDR_PRINT_DEBUG(smbXsrv_tcon_globalB, &global_blob);
713 }
714
715 TALLOC_FREE(global->db_rec);
716
717 return NT_STATUS_OK;
718 }
719
720 static int smbXsrv_tcon_destructor(struct smbXsrv_tcon *tcon)
721 {
722 NTSTATUS status;
723
724 status = smbXsrv_tcon_disconnect(tcon, 0);
725 if (!NT_STATUS_IS_OK(status)) {
726 DEBUG(0, ("smbXsrv_tcon_destructor: "
727 "smbXsrv_tcon_disconnect() failed - %s\n",
728 nt_errstr(status)));
729 }
730
731 TALLOC_FREE(tcon->global);
732
733 return 0;
734 }
735
736 static NTSTATUS smbXsrv_tcon_create(struct smbXsrv_tcon_table *table,
737 enum protocol_types protocol,
738 struct server_id server_id,
739 NTTIME now,
740 struct smbXsrv_tcon **_tcon)
741 {
742 struct db_record *local_rec = NULL;
743 struct smbXsrv_tcon *tcon = NULL;
744 void *ptr = NULL;
745 TDB_DATA val;
746 struct smbXsrv_tcon_global0 *global = NULL;
747 NTSTATUS status;
748
749 if (table->local.num_tcons >= table->local.max_tcons) {
750 return NT_STATUS_INSUFFICIENT_RESOURCES;
751 }
752
753 tcon = talloc_zero(table, struct smbXsrv_tcon);
754 if (tcon == NULL) {
755 return NT_STATUS_NO_MEMORY;
756 }
757 tcon->table = table;
758 tcon->status = NT_STATUS_INTERNAL_ERROR;
759 tcon->idle_time = now;
760
761 status = smbXsrv_tcon_global_allocate(table->global.db_ctx,
762 tcon, &global);
763 if (!NT_STATUS_IS_OK(status)) {
764 TALLOC_FREE(tcon);
765 return status;
766 }
767 tcon->global = global;
768
769 if (protocol >= PROTOCOL_SMB2_02) {
770 uint64_t id = global->tcon_global_id;
771
772 global->tcon_wire_id = id;
773
774 tcon->local_id = global->tcon_global_id;
775
776 local_rec = smbXsrv_tcon_local_fetch_locked(table->local.db_ctx,
777 tcon->local_id,
778 tcon /* TALLOC_CTX */);
779 if (local_rec == NULL) {
780 TALLOC_FREE(tcon);
781 return NT_STATUS_NO_MEMORY;
782 }
783
784 val = dbwrap_record_get_value(local_rec);
785 if (val.dsize != 0) {
786 TALLOC_FREE(tcon);
787 return NT_STATUS_INTERNAL_DB_CORRUPTION;
788 }
789 } else {
790
791 status = smb1srv_tcon_local_allocate_id(table->local.db_ctx,
792 table->local.lowest_id,
793 table->local.highest_id,
794 tcon,
795 &local_rec,
796 &tcon->local_id);
797 if (!NT_STATUS_IS_OK(status)) {
798 TALLOC_FREE(tcon);
799 return status;
800 }
801
802 global->tcon_wire_id = tcon->local_id;
803 }
804
805 global->creation_time = now;
806
807 global->server_id = server_id;
808
809 ptr = tcon;
810 val = make_tdb_data((uint8_t const *)&ptr, sizeof(ptr));
811 status = dbwrap_record_store(local_rec, val, TDB_REPLACE);
812 TALLOC_FREE(local_rec);
813 if (!NT_STATUS_IS_OK(status)) {
814 TALLOC_FREE(tcon);
815 return status;
816 }
817 table->local.num_tcons += 1;
818
819 talloc_set_destructor(tcon, smbXsrv_tcon_destructor);
820
821 status = smbXsrv_tcon_global_store(global);
822 if (!NT_STATUS_IS_OK(status)) {
823 DEBUG(0,("smbXsrv_tcon_create: "
824 "global_id (0x%08x) store failed - %s\n",
825 tcon->global->tcon_global_id,
826 nt_errstr(status)));
827 TALLOC_FREE(tcon);
828 return status;
829 }
830
831 if (DEBUGLVL(10)) {
832 struct smbXsrv_tconB tcon_blob;
833
834 ZERO_STRUCT(tcon_blob);
835 tcon_blob.version = SMBXSRV_VERSION_0;
836 tcon_blob.info.info0 = tcon;
837
838 DEBUG(10,("smbXsrv_tcon_create: global_id (0x%08x) stored\n",
839 tcon->global->tcon_global_id));
840 NDR_PRINT_DEBUG(smbXsrv_tconB, &tcon_blob);
841 }
842
843 *_tcon = tcon;
844 return NT_STATUS_OK;
845 }
846
847 NTSTATUS smbXsrv_tcon_update(struct smbXsrv_tcon *tcon)
848 {
849 struct smbXsrv_tcon_table *table = tcon->table;
850 NTSTATUS status;
851
852 if (tcon->global->db_rec != NULL) {
853 DEBUG(0, ("smbXsrv_tcon_update(0x%08x): "
854 "Called with db_rec != NULL'\n",
855 tcon->global->tcon_global_id));
856 return NT_STATUS_INTERNAL_ERROR;
857 }
858
859 tcon->global->db_rec = smbXsrv_tcon_global_fetch_locked(
860 table->global.db_ctx,
861 tcon->global->tcon_global_id,
862 tcon->global /* TALLOC_CTX */);
863 if (tcon->global->db_rec == NULL) {
864 return NT_STATUS_INTERNAL_DB_ERROR;
865 }
866
867 status = smbXsrv_tcon_global_store(tcon->global);
868 if (!NT_STATUS_IS_OK(status)) {
869 DEBUG(0,("smbXsrv_tcon_update: "
870 "global_id (0x%08x) store failed - %s\n",
871 tcon->global->tcon_global_id,
872 nt_errstr(status)));
873 return status;
874 }
875
876 if (DEBUGLVL(10)) {
877 struct smbXsrv_tconB tcon_blob;
878
879 ZERO_STRUCT(tcon_blob);
880 tcon_blob.version = SMBXSRV_VERSION_0;
881 tcon_blob.info.info0 = tcon;
882
883 DEBUG(10,("smbXsrv_tcon_update: global_id (0x%08x) stored\n",
884 tcon->global->tcon_global_id));
885 NDR_PRINT_DEBUG(smbXsrv_tconB, &tcon_blob);
886 }
887
888 return NT_STATUS_OK;
889 }
890
891 NTSTATUS smbXsrv_tcon_disconnect(struct smbXsrv_tcon *tcon, uint64_t vuid)
892 {
893 struct smbXsrv_tcon_table *table;
894 struct db_record *local_rec = NULL;
895 struct db_record *global_rec = NULL;
896 NTSTATUS status;
897 NTSTATUS error = NT_STATUS_OK;
898
899 if (tcon->table == NULL) {
900 return NT_STATUS_OK;
901 }
902
903 table = tcon->table;
904 tcon->table = NULL;
905
906 tcon->status = NT_STATUS_NETWORK_NAME_DELETED;
907
908 global_rec = tcon->global->db_rec;
909 tcon->global->db_rec = NULL;
910 if (global_rec == NULL) {
911 global_rec = smbXsrv_tcon_global_fetch_locked(
912 table->global.db_ctx,
913 tcon->global->tcon_global_id,
914 tcon->global /* TALLOC_CTX */);
915 if (global_rec == NULL) {
916 error = NT_STATUS_INTERNAL_ERROR;
917 }
918 }
919
920 if (global_rec != NULL) {
921 status = dbwrap_record_delete(global_rec);
922 if (!NT_STATUS_IS_OK(status)) {
923 TDB_DATA key = dbwrap_record_get_key(global_rec);
924
925 DEBUG(0, ("smbXsrv_tcon_disconnect(0x%08x, '%s'): "
926 "failed to delete global key '%s': %s\n",
927 tcon->global->tcon_global_id,
928 tcon->global->share_name,
929 hex_encode_talloc(global_rec, key.dptr,
930 key.dsize),
931 nt_errstr(status)));
932 error = status;
933 }
934 }
935 TALLOC_FREE(global_rec);
936
937 local_rec = tcon->db_rec;
938 if (local_rec == NULL) {
939 local_rec = smbXsrv_tcon_local_fetch_locked(table->local.db_ctx,
940 tcon->local_id,
941 tcon /* TALLOC_CTX */);
942 if (local_rec == NULL) {
943 error = NT_STATUS_INTERNAL_ERROR;
944 }
945 }
946
947 if (local_rec != NULL) {
948 status = dbwrap_record_delete(local_rec);
949 if (!NT_STATUS_IS_OK(status)) {
950 TDB_DATA key = dbwrap_record_get_key(local_rec);
951
952 DEBUG(0, ("smbXsrv_tcon_disconnect(0x%08x, '%s'): "
953 "failed to delete local key '%s': %s\n",
954 tcon->global->tcon_global_id,
955 tcon->global->share_name,
956 hex_encode_talloc(local_rec, key.dptr,
957 key.dsize),
958 nt_errstr(status)));
959 error = status;
960 }
961 table->local.num_tcons -= 1;
962 }
963 if (tcon->db_rec == NULL) {
964 TALLOC_FREE(local_rec);
965 }
966 tcon->db_rec = NULL;
967
968 if (tcon->compat) {
969 bool ok;
970
971 ok = set_current_service(tcon->compat, 0, true);
972 if (!ok) {
973 status = NT_STATUS_INTERNAL_ERROR;
974 DEBUG(0, ("smbXsrv_tcon_disconnect(0x%08x, '%s'): "
975 "set_current_service() failed: %s\n",
976 tcon->global->tcon_global_id,
977 tcon->global->share_name,
978 nt_errstr(status)));
979 tcon->compat = NULL;
980 return status;
981 }
982
983 close_cnum(tcon->compat, vuid);
984 tcon->compat = NULL;
985 }
986
987 return error;
988 }
989
990 struct smbXsrv_tcon_disconnect_all_state {
991 uint64_t vuid;
992 NTSTATUS first_status;
993 int errors;
994 };
995
996 static int smbXsrv_tcon_disconnect_all_callback(struct db_record *local_rec,
997 void *private_data);
998
999 static NTSTATUS smbXsrv_tcon_disconnect_all(struct smbXsrv_tcon_table *table,
1000 uint64_t vuid)
1001 {
1002 struct smbXsrv_tcon_disconnect_all_state state;
1003 NTSTATUS status;
1004 int count = 0;
1005
1006 if (table == NULL) {
1007 return NT_STATUS_OK;
1008 }
1009
1010 ZERO_STRUCT(state);
1011 state.vuid = vuid;
1012
1013 status = dbwrap_traverse(table->local.db_ctx,
1014 smbXsrv_tcon_disconnect_all_callback,
1015 &state, &count);
1016 if (!NT_STATUS_IS_OK(status)) {
1017 DEBUG(0, ("smbXsrv_tcon_disconnect_all: "
1018 "dbwrap_traverse() failed: %s\n",
1019 nt_errstr(status)));
1020 return status;
1021 }
1022
1023 if (!NT_STATUS_IS_OK(state.first_status)) {
1024 DEBUG(0, ("smbXsrv_tcon_disconnect_all: "
1025 "count[%d] errors[%d] first[%s]\n",
1026 count, state.errors,
1027 nt_errstr(state.first_status)));
1028 return state.first_status;
1029 }
1030
1031 return NT_STATUS_OK;
1032 }
1033
1034 static int smbXsrv_tcon_disconnect_all_callback(struct db_record *local_rec,
1035 void *private_data)
1036 {
1037 struct smbXsrv_tcon_disconnect_all_state *state =
1038 (struct smbXsrv_tcon_disconnect_all_state *)private_data;
1039 TDB_DATA val;
1040 void *ptr = NULL;
1041 struct smbXsrv_tcon *tcon = NULL;
1042 uint64_t vuid;
1043 NTSTATUS status;
1044
1045 val = dbwrap_record_get_value(local_rec);
1046 if (val.dsize != sizeof(ptr)) {
1047 status = NT_STATUS_INTERNAL_ERROR;
1048 if (NT_STATUS_IS_OK(state->first_status)) {
1049 state->first_status = status;
1050 }
1051 state->errors++;
1052 return 0;
1053 }
1054
1055 memcpy(&ptr, val.dptr, val.dsize);
1056 tcon = talloc_get_type_abort(ptr, struct smbXsrv_tcon);
1057
1058 vuid = state->vuid;
1059 if (vuid == 0 && tcon->compat) {
1060 vuid = tcon->compat->vuid;
1061 }
1062
1063 tcon->db_rec = local_rec;
1064 status = smbXsrv_tcon_disconnect(tcon, vuid);
1065 if (!NT_STATUS_IS_OK(status)) {
1066 if (NT_STATUS_IS_OK(state->first_status)) {
1067 state->first_status = status;
1068 }
1069 state->errors++;
1070 return 0;
1071 }
1072
1073 return 0;
1074 }
1075
1076 NTSTATUS smb1srv_tcon_table_init(struct smbXsrv_connection *conn)
1077 {
1078 struct smbXsrv_client *client = conn->client;
1079
1080 /*
1081 * Allow a range from 1..65534 with 65534 values.
1082 */
1083 client->tcon_table = talloc_zero(client, struct smbXsrv_tcon_table);
1084 if (client->tcon_table == NULL) {
1085 return NT_STATUS_NO_MEMORY;
1086 }
1087
1088 return smbXsrv_tcon_table_init(client, client->tcon_table,
1089 1, UINT16_MAX - 1,
1090 UINT16_MAX - 1);
1091 }
1092
1093 NTSTATUS smb1srv_tcon_create(struct smbXsrv_connection *conn,
1094 NTTIME now,
1095 struct smbXsrv_tcon **_tcon)
1096 {
1097 struct server_id id = messaging_server_id(conn->msg_ctx);
1098
1099 return smbXsrv_tcon_create(conn->client->tcon_table,
1100 conn->protocol,
1101 id, now, _tcon);
1102 }
1103
1104 NTSTATUS smb1srv_tcon_lookup(struct smbXsrv_connection *conn,
1105 uint16_t tree_id, NTTIME now,
1106 struct smbXsrv_tcon **tcon)
1107 {
1108 uint32_t local_id = tree_id;
1109
1110 return smbXsrv_tcon_local_lookup(conn->client->tcon_table,
1111 local_id, now, tcon);
1112 }
1113
1114 NTSTATUS smb1srv_tcon_disconnect_all(struct smbXsrv_connection *conn)
1115 {
1116 struct smbXsrv_client *client = conn->client;
1117
1118 /*
1119 * We do not pass a vuid here,
1120 * which means the vuid is taken from
1121 * the tcon->compat->vuid.
1122 *
1123 * NOTE: that tcon->compat->vuid may point to
1124 * a none existing vuid (or the wrong one)
1125 * as the tcon can exist without a session
1126 * in SMB1.
1127 *
1128 * This matches the old behavior of
1129 * conn_close_all(), but we should think
1130 * about how to fix this in future.
1131 */
1132 return smbXsrv_tcon_disconnect_all(client->tcon_table, 0);
1133 }
1134
1135 NTSTATUS smb2srv_tcon_table_init(struct smbXsrv_session *session)
1136 {
1137 /*
1138 * Allow a range from 1..4294967294 with 65534 (same as SMB1) values.
1139 */
1140 session->tcon_table = talloc_zero(session, struct smbXsrv_tcon_table);
1141 if (session->tcon_table == NULL) {
1142 return NT_STATUS_NO_MEMORY;
1143 }
1144
1145 return smbXsrv_tcon_table_init(session, session->tcon_table,
1146 1, UINT32_MAX - 1,
1147 UINT16_MAX - 1);
1148 }
1149
1150 NTSTATUS smb2srv_tcon_create(struct smbXsrv_session *session,
1151 NTTIME now,
1152 struct smbXsrv_tcon **_tcon)
1153 {
1154 struct server_id id = messaging_server_id(session->client->msg_ctx);
1155
1156 return smbXsrv_tcon_create(session->tcon_table,
1157 PROTOCOL_SMB2_02,
1158 id, now, _tcon);
1159 }
1160
1161 NTSTATUS smb2srv_tcon_lookup(struct smbXsrv_session *session,
1162 uint32_t tree_id, NTTIME now,
1163 struct smbXsrv_tcon **tcon)
1164 {
1165 uint32_t local_id = tree_id;
1166
1167 return smbXsrv_tcon_local_lookup(session->tcon_table,
1168 local_id, now, tcon);
1169 }
1170
1171 NTSTATUS smb2srv_tcon_disconnect_all(struct smbXsrv_session *session)
1172 {
1173 uint64_t vuid;
1174
1175 if (session->compat) {
1176 vuid = session->compat->vuid;
1177 } else {
1178 vuid = 0;
1179 }
1180
1181 return smbXsrv_tcon_disconnect_all(session->tcon_table, vuid);
1182 }
1183
1184 struct smbXsrv_tcon_global_traverse_state {
1185 int (*fn)(struct smbXsrv_tcon_global0 *, void *);
1186 void *private_data;
1187 };
1188
1189 static int smbXsrv_tcon_global_traverse_fn(struct db_record *rec, void *data)
1190 {
1191 int ret = -1;
1192 struct smbXsrv_tcon_global_traverse_state *state =
1193 (struct smbXsrv_tcon_global_traverse_state*)data;
1194 TDB_DATA key = dbwrap_record_get_key(rec);
1195 TDB_DATA val = dbwrap_record_get_value(rec);
1196 DATA_BLOB blob = data_blob_const(val.dptr, val.dsize);
1197 struct smbXsrv_tcon_globalB global_blob;
1198 enum ndr_err_code ndr_err;
1199 TALLOC_CTX *frame = talloc_stackframe();
1200
1201 ndr_err = ndr_pull_struct_blob(&blob, frame, &global_blob,
1202 (ndr_pull_flags_fn_t)ndr_pull_smbXsrv_tcon_globalB);
1203 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
1204 DEBUG(1,("Invalid record in smbXsrv_tcon_global.tdb:"
1205 "key '%s' ndr_pull_struct_blob - %s\n",
1206 hex_encode_talloc(frame, key.dptr, key.dsize),
1207 ndr_errstr(ndr_err)));
1208 goto done;
1209 }
1210
1211 if (global_blob.version != SMBXSRV_VERSION_0) {
1212 DEBUG(1,("Invalid record in smbXsrv_tcon_global.tdb:"
1213 "key '%s' unsuported version - %d\n",
1214 hex_encode_talloc(frame, key.dptr, key.dsize),
1215 (int)global_blob.version));
1216 goto done;
1217 }
1218
1219 global_blob.info.info0->db_rec = rec;
1220 ret = state->fn(global_blob.info.info0, state->private_data);
1221 done:
1222 TALLOC_FREE(frame);
1223 return ret;
1224 }
1225
1226 NTSTATUS smbXsrv_tcon_global_traverse(
1227 int (*fn)(struct smbXsrv_tcon_global0 *, void *),
1228 void *private_data)
1229 {
1230 NTSTATUS status;
1231 int count = 0;
1232 struct smbXsrv_tcon_global_traverse_state state = {
1233 .fn = fn,
1234 .private_data = private_data,
1235 };
1236
1237 become_root();
1238 status = smbXsrv_tcon_global_init();
1239 if (!NT_STATUS_IS_OK(status)) {
1240 unbecome_root();
1241 DEBUG(0, ("Failed to initialize tcon_global: %s\n",
1242 nt_errstr(status)));
1243 return status;
1244 }
1245
1246 status = dbwrap_traverse_read(smbXsrv_tcon_global_db_ctx,
1247 smbXsrv_tcon_global_traverse_fn,
1248 &state,
1249 &count);
1250 unbecome_root();
1251
1252 return status;
1253 }
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