2 Unix SMB/CIFS implementation.
4 common functions for TDB based idmapping backends
6 Copyright (C) Christian Ambach 2012
8 These functions were initially copied over from idmap_tdb.c and idmap_tdb2.c
11 Copyright (C) Tim Potter 2000
12 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
13 Copyright (C) Jeremy Allison 2006
14 Copyright (C) Simo Sorce 2003-2006
15 Copyright (C) Michael Adam 2009-2010
16 Copyright (C) Andrew Tridgell 2007
18 This program is free software; you can redistribute it and/or modify
19 it under the terms of the GNU General Public License as published by
20 the Free Software Foundation; either version 2 of the License, or
21 (at your option) any later version.
23 This program is distributed in the hope that it will be useful,
24 but WITHOUT ANY WARRANTY; without even the implied warranty of
25 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 GNU General Public License for more details.
28 You should have received a copy of the GNU General Public License
29 along with this program; if not, write to the Free Software
30 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
34 #include "idmap_tdb_common.h"
35 #include "dbwrap/dbwrap.h"
38 #include "../libcli/security/dom_sid.h"
41 #define DBGC_CLASS DBGC_IDMAP
43 struct idmap_tdb_common_allocate_id_context {
50 static NTSTATUS idmap_tdb_common_allocate_id_action(struct db_context *db,
54 struct idmap_tdb_common_allocate_id_context *state;
57 state = (struct idmap_tdb_common_allocate_id_context *)private_data;
59 ret = dbwrap_fetch_uint32_bystring(db, state->hwmkey, &hwm);
60 if (!NT_STATUS_IS_OK(ret)) {
61 ret = NT_STATUS_INTERNAL_DB_ERROR;
65 /* check it is in the range */
66 if (hwm > state->high_hwm) {
67 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
68 state->hwmtype, (unsigned long)state->high_hwm));
69 ret = NT_STATUS_UNSUCCESSFUL;
73 /* fetch a new id and increment it */
74 ret = dbwrap_change_uint32_atomic_bystring(db, state->hwmkey, &hwm, 1);
75 if (!NT_STATUS_IS_OK(ret)) {
76 DEBUG(1, ("Fatal error while fetching a new %s value\n!",
81 /* recheck it is in the range */
82 if (hwm > state->high_hwm) {
83 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
84 state->hwmtype, (unsigned long)state->high_hwm));
85 ret = NT_STATUS_UNSUCCESSFUL;
96 static NTSTATUS idmap_tdb_common_allocate_id(struct idmap_domain *dom,
103 struct idmap_tdb_common_allocate_id_context state;
104 struct idmap_tdb_common_context *ctx;
107 talloc_get_type_abort(dom->private_data,
108 struct idmap_tdb_common_context);
110 /* Get current high water mark */
114 hwmkey = ctx->hwmkey_uid;
119 hwmkey = ctx->hwmkey_gid;
124 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
125 return NT_STATUS_INVALID_PARAMETER;
129 state.high_hwm = ctx->max_id;
130 state.hwmtype = hwmtype;
131 state.hwmkey = hwmkey;
133 status = dbwrap_trans_do(ctx->db, idmap_tdb_common_allocate_id_action,
136 if (NT_STATUS_IS_OK(status)) {
138 DEBUG(10, ("New %s = %d\n", hwmtype, state.hwm));
140 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
147 * Allocate a new unix-ID.
148 * For now this is for the default idmap domain only.
149 * Should be extended later on.
151 NTSTATUS idmap_tdb_common_get_new_id(struct idmap_domain * dom,
156 if (!strequal(dom->name, "*")) {
157 DEBUG(3, ("idmap_tdb_common_get_new_id: "
158 "Refusing allocation of a new unixid for domain'%s'. "
159 "Currently only supported for the default "
160 "domain \"*\".\n", dom->name));
161 return NT_STATUS_NOT_IMPLEMENTED;
164 ret = idmap_tdb_common_allocate_id(dom, id);
170 * store a mapping in the database.
173 struct idmap_tdb_common_set_mapping_context {
178 static NTSTATUS idmap_tdb_common_set_mapping_action(struct db_context *db,
183 struct idmap_tdb_common_set_mapping_context *state;
184 TALLOC_CTX *tmp_ctx = talloc_stackframe();
186 state = (struct idmap_tdb_common_set_mapping_context *)private_data;
188 DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
190 /* check whether sid mapping is already present in db */
191 ret = dbwrap_fetch_bystring(db, tmp_ctx, state->ksidstr, &data);
192 if (NT_STATUS_IS_OK(ret)) {
193 ret = NT_STATUS_OBJECT_NAME_COLLISION;
197 ret = dbwrap_store_bystring(db, state->ksidstr,
198 string_term_tdb_data(state->kidstr),
200 if (!NT_STATUS_IS_OK(ret)) {
201 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
205 ret = dbwrap_store_bystring(db, state->kidstr,
206 string_term_tdb_data(state->ksidstr),
208 if (!NT_STATUS_IS_OK(ret)) {
209 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
210 /* try to remove the previous stored SID -> ID map */
211 dbwrap_delete_bystring(db, state->ksidstr);
215 DEBUG(10, ("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
218 talloc_free(tmp_ctx);
222 NTSTATUS idmap_tdb_common_set_mapping(struct idmap_domain * dom,
223 const struct id_map * map)
225 struct idmap_tdb_common_context *ctx;
226 struct idmap_tdb_common_set_mapping_context state;
228 char *ksidstr, *kidstr;
230 if (!map || !map->sid) {
231 return NT_STATUS_INVALID_PARAMETER;
234 ksidstr = kidstr = NULL;
236 /* TODO: should we filter a set_mapping using low/high filters ? */
239 talloc_get_type_abort(dom->private_data,
240 struct idmap_tdb_common_context);
242 switch (map->xid.type) {
246 talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
251 talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
255 DEBUG(2, ("INVALID unix ID type: 0x%02x\n", map->xid.type));
256 return NT_STATUS_INVALID_PARAMETER;
259 if (kidstr == NULL) {
260 DEBUG(0, ("ERROR: Out of memory!\n"));
261 ret = NT_STATUS_NO_MEMORY;
265 ksidstr = sid_string_talloc(ctx, map->sid);
266 if (ksidstr == NULL) {
267 DEBUG(0, ("Out of memory!\n"));
268 ret = NT_STATUS_NO_MEMORY;
272 state.ksidstr = ksidstr;
273 state.kidstr = kidstr;
275 ret = dbwrap_trans_do(ctx->db, idmap_tdb_common_set_mapping_action,
279 talloc_free(ksidstr);
285 * Create a new mapping for an unmapped SID, also allocating a new ID.
286 * This should be run inside a transaction.
289 * Properly integrate this with multi domain idmap config:
290 * Currently, the allocator is default-config only.
292 NTSTATUS idmap_tdb_common_new_mapping(struct idmap_domain * dom,
296 struct idmap_tdb_common_context *ctx;
299 talloc_get_type_abort(dom->private_data,
300 struct idmap_tdb_common_context);
302 ret = idmap_rw_new_mapping(dom, ctx->rw_ops, map);
308 lookup a set of unix ids
310 NTSTATUS idmap_tdb_common_unixids_to_sids(struct idmap_domain * dom,
311 struct id_map ** ids)
314 int i, num_mapped = 0;
315 struct idmap_tdb_common_context *ctx;
317 NTSTATUS(*unixid_to_sid_fn) (struct idmap_domain * dom,
318 struct id_map * map);
320 talloc_get_type_abort(dom->private_data,
321 struct idmap_tdb_common_context);
323 if (ctx->unixid_to_sid_fn == NULL) {
324 unixid_to_sid_fn = idmap_tdb_common_unixid_to_sid;
326 unixid_to_sid_fn = ctx->unixid_to_sid_fn;
329 /* initialize the status to avoid surprise */
330 for (i = 0; ids[i]; i++) {
331 ids[i]->status = ID_UNKNOWN;
334 for (i = 0; ids[i]; i++) {
335 ret = unixid_to_sid_fn(dom, ids[i]);
336 if (!NT_STATUS_IS_OK(ret)) {
338 /* if it is just a failed mapping continue */
339 if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
341 /* make sure it is marked as unmapped */
342 ids[i]->status = ID_UNMAPPED;
346 /* some fatal error occurred, return immediately */
350 /* all ok, id is mapped */
351 ids[i]->status = ID_MAPPED;
359 if (NT_STATUS_IS_OK(ret)) {
360 if (i == 0 || num_mapped == 0) {
361 ret = NT_STATUS_NONE_MAPPED;
362 } else if (num_mapped < i) {
363 ret = STATUS_SOME_UNMAPPED;
373 default single id to sid lookup function
375 NTSTATUS idmap_tdb_common_unixid_to_sid(struct idmap_domain * dom,
381 struct idmap_tdb_common_context *ctx;
384 return NT_STATUS_INVALID_PARAMETER;
388 talloc_get_type_abort(dom->private_data,
389 struct idmap_tdb_common_context);
391 /* apply filters before checking */
392 if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
394 ("Requested id (%u) out of range (%u - %u). Filtered!\n",
395 map->xid.id, dom->low_id, dom->high_id));
396 return NT_STATUS_NONE_MAPPED;
399 switch (map->xid.type) {
403 talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
408 talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
412 DEBUG(2, ("INVALID unix ID type: 0x%02x\n", map->xid.type));
413 return NT_STATUS_INVALID_PARAMETER;
416 if (keystr == NULL) {
417 DEBUG(0, ("Out of memory!\n"));
418 ret = NT_STATUS_NO_MEMORY;
422 DEBUG(10, ("Fetching record %s\n", keystr));
424 /* Check if the mapping exists */
425 ret = dbwrap_fetch_bystring(ctx->db, keystr, keystr, &data);
427 if (!NT_STATUS_IS_OK(ret)) {
428 DEBUG(10, ("Record %s not found\n", keystr));
429 ret = NT_STATUS_NONE_MAPPED;
433 if (!string_to_sid(map->sid, (const char *)data.dptr)) {
434 DEBUG(10, ("INVALID SID (%s) in record %s\n",
435 (const char *)data.dptr, keystr));
436 ret = NT_STATUS_INTERNAL_DB_ERROR;
440 DEBUG(10, ("Found record %s -> %s\n", keystr, (const char *)data.dptr));
448 /**********************************
449 Single sid to id lookup function.
450 **********************************/
452 NTSTATUS idmap_tdb_common_sid_to_unixid(struct idmap_domain * dom,
458 unsigned long rec_id = 0;
459 struct idmap_tdb_common_context *ctx;
460 TALLOC_CTX *tmp_ctx = talloc_stackframe();
463 talloc_free(tmp_ctx);
464 return NT_STATUS_INVALID_PARAMETER;
468 talloc_get_type_abort(dom->private_data,
469 struct idmap_tdb_common_context);
471 keystr = sid_string_talloc(tmp_ctx, map->sid);
472 if (keystr == NULL) {
473 DEBUG(0, ("Out of memory!\n"));
474 ret = NT_STATUS_NO_MEMORY;
478 DEBUG(10, ("Fetching record %s\n", keystr));
480 /* Check if sid is present in database */
481 ret = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr, &data);
482 if (!NT_STATUS_IS_OK(ret)) {
483 DEBUG(10, ("Record %s not found\n", keystr));
484 ret = NT_STATUS_NONE_MAPPED;
488 /* What type of record is this ? */
489 if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) {
490 /* Try a UID record. */
491 map->xid.id = rec_id;
492 map->xid.type = ID_TYPE_UID;
494 ("Found uid record %s -> %s \n", keystr,
495 (const char *)data.dptr));
498 } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) {
499 /* Try a GID record. */
500 map->xid.id = rec_id;
501 map->xid.type = ID_TYPE_GID;
503 ("Found gid record %s -> %s \n", keystr,
504 (const char *)data.dptr));
507 } else { /* Unknown record type ! */
509 ("Found INVALID record %s -> %s\n", keystr,
510 (const char *)data.dptr));
511 ret = NT_STATUS_INTERNAL_DB_ERROR;
515 /* apply filters before returning result */
516 if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
518 ("Requested id (%u) out of range (%u - %u). Filtered!\n",
519 map->xid.id, dom->low_id, dom->high_id));
520 ret = NT_STATUS_NONE_MAPPED;
524 talloc_free(tmp_ctx);
528 /**********************************
530 **********************************/
532 struct idmap_tdb_common_sids_to_unixids_context {
533 struct idmap_domain *dom;
535 bool allocate_unmapped;
536 NTSTATUS(*sid_to_unixid_fn) (struct idmap_domain * dom,
537 struct id_map * map);
540 static NTSTATUS idmap_tdb_common_sids_to_unixids_action(struct db_context *db,
543 struct idmap_tdb_common_sids_to_unixids_context *state;
544 int i, num_mapped = 0;
545 NTSTATUS ret = NT_STATUS_OK;
547 state = (struct idmap_tdb_common_sids_to_unixids_context *)private_data;
549 DEBUG(10, ("idmap_tdb_common_sids_to_unixids: "
550 " domain: [%s], allocate: %s\n",
551 state->dom->name, state->allocate_unmapped ? "yes" : "no"));
553 for (i = 0; state->ids[i]; i++) {
554 if ((state->ids[i]->status == ID_UNKNOWN) ||
555 /* retry if we could not map in previous run: */
556 (state->ids[i]->status == ID_UNMAPPED)) {
559 ret2 = state->sid_to_unixid_fn(state->dom,
562 if (!NT_STATUS_IS_OK(ret2)) {
564 /* if it is just a failed mapping, continue */
566 (ret2, NT_STATUS_NONE_MAPPED)) {
568 /* make sure it is marked as unmapped */
569 state->ids[i]->status = ID_UNMAPPED;
570 ret = STATUS_SOME_UNMAPPED;
573 * some fatal error occurred,
580 /* all ok, id is mapped */
581 state->ids[i]->status = ID_MAPPED;
585 if (state->ids[i]->status == ID_MAPPED) {
589 if ((state->ids[i]->status == ID_UNMAPPED) &&
590 state->allocate_unmapped) {
592 idmap_tdb_common_new_mapping(state->dom,
594 if (!NT_STATUS_IS_OK(ret)) {
603 if (NT_STATUS_IS_OK(ret) ||
604 NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED)) {
605 if (i == 0 || num_mapped == 0) {
606 ret = NT_STATUS_NONE_MAPPED;
607 } else if (num_mapped < i) {
608 ret = STATUS_SOME_UNMAPPED;
617 NTSTATUS idmap_tdb_common_sids_to_unixids(struct idmap_domain * dom,
618 struct id_map ** ids)
622 struct idmap_tdb_common_sids_to_unixids_context state;
623 struct idmap_tdb_common_context *ctx;
626 talloc_get_type_abort(dom->private_data,
627 struct idmap_tdb_common_context);
629 /* initialize the status to avoid surprise */
630 for (i = 0; ids[i]; i++) {
631 ids[i]->status = ID_UNKNOWN;
636 state.allocate_unmapped = false;
637 if (ctx->sid_to_unixid_fn == NULL) {
638 state.sid_to_unixid_fn = idmap_tdb_common_sid_to_unixid;
640 state.sid_to_unixid_fn = ctx->sid_to_unixid_fn;
643 ret = idmap_tdb_common_sids_to_unixids_action(ctx->db, &state);
645 if ( (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED) ||
646 NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) &&
648 state.allocate_unmapped = true;
649 ret = dbwrap_trans_do(ctx->db,
650 idmap_tdb_common_sids_to_unixids_action,