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samba-mirror/source3/winbindd/idmap_autorid.c
Jeremy Allison 306783d6f5 lib: modules: Change XXX_init interface from XXX_init(void) to XXX_init(TALLOC_CTX *)
Not currently used - no logic changes inside.

This will make it possible to pass down a long-lived talloc
context from the loading function for modules to use instead
of having them internally all use talloc_autofree_context()
which is a hidden global.

Updated all known module interface numbers, and added a
WHATSNEW.

Signed-off-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Ralph Böhme <slow@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Apr 22 01:17:00 CEST 2017 on sn-devel-144
2017-04-22 01:17:00 +02:00

932 lines
23 KiB
C

/*
* idmap_autorid: static map between Active Directory/NT RIDs
* and RFC 2307 accounts
*
* based on the idmap_rid module, but this module defines the ranges
* for the domains by automatically allocating a range for each domain
*
* Copyright (C) Christian Ambach, 2010-2012
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
/*
* This module allocates ranges for domains to be used in a
* algorithmic mode like idmap_rid. Multiple ranges are supported
* for a single domain: If a rid exceeds the range size, a matching
* range is allocated to hold the rid's id.
*
* Here are the formulas applied:
*
*
* For a sid of the form domain_sid-rid, we have
*
* rid = reduced_rid + domain_range_index * range_size
*
* with
* reduced_rid := rid % range_size
* domain_range_index := rid / range_size
*
* And reduced_rid fits into a range.
*
* In the database, we associate a range_number to
* the pair domain_sid,domain_range_index.
*
* Now the unix id for the given sid calculates as:
*
* id = reduced_rid + range_low_id
*
* with
*
* range_low_id = low_id + range_number * range_size
*
*
* The inverse calculation goes like this:
*
* Given a unix id, let
*
* normalized_id := id - low_id
* reduced_rid := normalized_id % range_size
* range_number = normalized_id / range_size
*
* Then we have
*
* id = reduced_rid + low_id + range_number * range_size
*
* From the database, get the domain_sid,domain_range_index pair
* belonging to the range_number (if there is already one).
*
* Then the rid for the unix id calculates as:
*
* rid = reduced_rid + domain_range_index * range_size
*/
#include "idmap_autorid_tdb.h"
#include "winbindd.h"
#include "idmap.h"
#include "idmap_rw.h"
#include "../libcli/security/dom_sid.h"
#include "libsmb/samlogon_cache.h"
#include "passdb/machine_sid.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_IDMAP
#define IDMAP_AUTORID_ALLOC_RESERVED 500
/* handle to the tdb storing domain <-> range assignments */
static struct db_context *autorid_db;
static bool ignore_builtin = false;
static NTSTATUS idmap_autorid_get_alloc_range(struct idmap_domain *dom,
struct autorid_range_config *range)
{
NTSTATUS status;
ZERO_STRUCT(*range);
fstrcpy(range->domsid, ALLOC_RANGE);
status = idmap_autorid_get_domainrange(autorid_db,
range,
dom->read_only);
return status;
}
static NTSTATUS idmap_autorid_allocate_id(struct idmap_domain *dom,
struct unixid *xid) {
NTSTATUS ret;
struct autorid_range_config range;
if (dom->read_only) {
DEBUG(3, ("Backend is read-only, refusing "
"new allocation request\n"));
return NT_STATUS_UNSUCCESSFUL;
}
/* fetch the range for the allocation pool */
ret = idmap_autorid_get_alloc_range(dom, &range);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(3, ("Could not determine range for allocation pool, "
"check previous messages for reason\n"));
return ret;
}
ret = idmap_tdb_common_get_new_id(dom, xid);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(1, ("Fatal error while allocating new ID!\n"));
return ret;
}
xid->id = xid->id + range.low_id;
DEBUG(10, ("Returned new %s %d from allocation range\n",
(xid->type==ID_TYPE_UID)?"uid":"gid", xid->id));
return ret;
}
/*
* map a xid to SID using the idmap_tdb like pool
*/
static NTSTATUS idmap_autorid_id_to_sid_alloc(struct idmap_domain *dom,
struct id_map *map)
{
NTSTATUS ret;
/* look out for the mapping */
ret = idmap_tdb_common_unixid_to_sid(dom, map);
if (NT_STATUS_IS_OK(ret)) {
map->status = ID_MAPPED;
return ret;
}
map->status = ID_UNKNOWN;
DEBUG(10, ("no ID->SID mapping for %d could be found\n", map->xid.id));
return ret;
}
static NTSTATUS idmap_autorid_id_to_sid(struct autorid_global_config *cfg,
struct idmap_domain *dom,
struct id_map *map)
{
uint32_t range_number;
uint32_t domain_range_index;
uint32_t normalized_id;
uint32_t reduced_rid;
uint32_t rid;
TDB_DATA data = tdb_null;
char *keystr;
struct dom_sid domsid;
NTSTATUS status;
bool ok;
const char *q = NULL;
/* can this be one of our ids? */
if (map->xid.id < cfg->minvalue) {
DEBUG(10, ("id %d is lower than minimum value, "
"ignoring mapping request\n", map->xid.id));
map->status = ID_UNKNOWN;
return NT_STATUS_OK;
}
if (map->xid.id > (cfg->minvalue + cfg->rangesize * cfg->maxranges)) {
DEBUG(10, ("id %d is outside of maximum id value, "
"ignoring mapping request\n", map->xid.id));
map->status = ID_UNKNOWN;
return NT_STATUS_OK;
}
/* determine the range of this uid */
normalized_id = map->xid.id - cfg->minvalue;
range_number = normalized_id / cfg->rangesize;
keystr = talloc_asprintf(talloc_tos(), "%u", range_number);
if (!keystr) {
return NT_STATUS_NO_MEMORY;
}
status = dbwrap_fetch_bystring(autorid_db, talloc_tos(), keystr, &data);
TALLOC_FREE(keystr);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(4, ("id %d belongs to range %d which does not have "
"domain mapping, ignoring mapping request\n",
map->xid.id, range_number));
TALLOC_FREE(data.dptr);
map->status = ID_UNKNOWN;
return NT_STATUS_OK;
}
if ((data.dsize == 0) || (data.dptr[data.dsize-1] != '\0')) {
DBG_WARNING("Invalid range %"PRIu32"\n", range_number);
TALLOC_FREE(data.dptr);
map->status = ID_UNKNOWN;
return NT_STATUS_OK;
}
if (strncmp((const char *)data.dptr,
ALLOC_RANGE,
strlen(ALLOC_RANGE)) == 0) {
/*
* this is from the alloc range, check if there is a mapping
*/
DEBUG(5, ("id %d belongs to allocation range, "
"checking for mapping\n",
map->xid.id));
TALLOC_FREE(data.dptr);
return idmap_autorid_id_to_sid_alloc(dom, map);
}
ok = dom_sid_parse_endp((const char *)data.dptr, &domsid, &q);
if (!ok) {
TALLOC_FREE(data.dptr);
map->status = ID_UNKNOWN;
return NT_STATUS_OK;
}
/*
* Allow for sid#range_index, just sid is range index 0
*/
switch (*q) {
case '\0':
domain_range_index = 0;
break;
case '#':
if (sscanf(q+1, "%"SCNu32, &domain_range_index) == 1) {
break;
}
/* If we end up here, something weird is in the record. */
/* FALL THROUGH */
default:
DBG_DEBUG("SID/domain range: %s\n",
(const char *)data.dptr);
TALLOC_FREE(data.dptr);
map->status = ID_UNKNOWN;
return NT_STATUS_OK;
}
TALLOC_FREE(data.dptr);
reduced_rid = normalized_id % cfg->rangesize;
rid = reduced_rid + domain_range_index * cfg->rangesize;
sid_compose(map->sid, &domsid, rid);
/* We **really** should have some way of validating
the SID exists and is the correct type here. But
that is a deficiency in the idmap_rid design. */
map->status = ID_MAPPED;
map->xid.type = ID_TYPE_BOTH;
return NT_STATUS_OK;
}
/**********************************
Single sid to id lookup function.
**********************************/
static NTSTATUS idmap_autorid_sid_to_id_rid(
uint32_t rangesize,
uint32_t low_id,
struct id_map *map)
{
uint32_t rid;
uint32_t reduced_rid;
sid_peek_rid(map->sid, &rid);
reduced_rid = rid % rangesize;
map->xid.id = reduced_rid + low_id;
map->xid.type = ID_TYPE_BOTH;
map->status = ID_MAPPED;
return NT_STATUS_OK;
}
/**********************************
lookup a set of unix ids.
**********************************/
static NTSTATUS idmap_autorid_unixids_to_sids(struct idmap_domain *dom,
struct id_map **ids)
{
struct idmap_tdb_common_context *commoncfg;
struct autorid_global_config *globalcfg;
NTSTATUS ret;
int i;
int num_tomap = 0;
int num_mapped = 0;
/* initialize the status to avoid surprise */
for (i = 0; ids[i]; i++) {
ids[i]->status = ID_UNKNOWN;
num_tomap++;
}
commoncfg =
talloc_get_type_abort(dom->private_data,
struct idmap_tdb_common_context);
globalcfg = talloc_get_type(commoncfg->private_data,
struct autorid_global_config);
for (i = 0; ids[i]; i++) {
ret = idmap_autorid_id_to_sid(globalcfg, dom, ids[i]);
if ((!NT_STATUS_IS_OK(ret)) &&
(!NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) {
/* some fatal error occurred, log it */
DBG_NOTICE("Unexpected error resolving an ID "
"(%d): %s\n", ids[i]->xid.id,
nt_errstr(ret));
goto failure;
}
if (NT_STATUS_IS_OK(ret) && ids[i]->status == ID_MAPPED) {
num_mapped++;
}
}
if (num_tomap == num_mapped) {
return NT_STATUS_OK;
}
if (num_mapped == 0) {
return NT_STATUS_NONE_MAPPED;
}
return STATUS_SOME_UNMAPPED;
failure:
return ret;
}
static bool idmap_autorid_sid_is_special(struct dom_sid *sid)
{
bool match;
match = sid_check_is_in_wellknown_domain(sid);
if (match) {
return true;
}
return false;
}
static NTSTATUS idmap_autorid_sid_to_id_special(struct idmap_domain *dom,
struct id_map *map)
{
struct idmap_tdb_common_context *common =
talloc_get_type_abort(dom->private_data,
struct idmap_tdb_common_context);
uint32_t count;
struct autorid_range_config range;
NTSTATUS status;
uint32_t free_id;
status = idmap_autorid_get_alloc_range(dom, &range);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
/* Take the next free ID, counting from the top */
free_id = 0;
for (count = 0; count < IDMAP_AUTORID_ALLOC_RESERVED; count++) {
struct id_map test_map;
struct dom_sid sid;
test_map.sid = &sid;
test_map.xid.type = map->xid.type;
test_map.xid.id = range.high_id - count;
test_map.status = ID_UNKNOWN;
status = idmap_tdb_common_unixid_to_sid(dom, &test_map);
if (NT_STATUS_EQUAL(NT_STATUS_NONE_MAPPED, status)) {
free_id = test_map.xid.id;
break;
}
if (!NT_STATUS_IS_OK(status)) {
/* error - get out */
return status;
}
/* mapping exists - try next ID */
}
if (free_id == 0) {
return NT_STATUS_NONE_MAPPED;
}
map->status = ID_MAPPED;
map->xid.id = free_id;
status = common->rw_ops->set_mapping(dom, map);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(2, ("Error storing new mapping: %s\n",
nt_errstr(status)));
return status;
}
return NT_STATUS_OK;
}
struct idmap_autorid_sid_to_id_alloc_ctx {
struct idmap_domain *dom;
struct id_map *map;
};
static NTSTATUS idmap_autorid_sid_to_id_alloc_action(
struct db_context *db,
void *private_data)
{
struct idmap_autorid_sid_to_id_alloc_ctx *ctx;
ctx = (struct idmap_autorid_sid_to_id_alloc_ctx *)private_data;
if (idmap_autorid_sid_is_special(ctx->map->sid)) {
NTSTATUS ret;
ret = idmap_autorid_sid_to_id_special(ctx->dom, ctx->map);
if (NT_STATUS_IS_OK(ret)) {
return NT_STATUS_OK;
}
if (!NT_STATUS_EQUAL(NT_STATUS_NONE_MAPPED, ret)) {
return ret;
}
DEBUG(10, ("Sepecial sid %s not mapped. falling back to "
"regular allocation\n",
sid_string_dbg(ctx->map->sid)));
}
return idmap_tdb_common_new_mapping(ctx->dom, ctx->map);
}
/*
* map a SID to xid using the idmap_tdb like pool
*/
static NTSTATUS idmap_autorid_sid_to_id_alloc(
struct idmap_tdb_common_context *ctx,
struct idmap_domain *dom,
struct id_map *map)
{
NTSTATUS ret;
struct idmap_autorid_sid_to_id_alloc_ctx alloc_ctx;
map->status = ID_UNKNOWN;
/* see if we already have a mapping */
ret = idmap_tdb_common_sid_to_unixid(dom, map);
if (NT_STATUS_IS_OK(ret)) {
map->status = ID_MAPPED;
return ret;
}
/* bad things happened */
if (!NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
DEBUG(1, ("Looking up SID->ID mapping for %s failed: %s\n",
sid_string_dbg(map->sid), nt_errstr(ret)));
return ret;
}
if (dom->read_only) {
DEBUG(3, ("Not allocating new mapping for %s, because backend "
"is read-only\n", sid_string_dbg(map->sid)));
map->status = ID_UNMAPPED;
return NT_STATUS_NONE_MAPPED;
}
DEBUG(10, ("Creating new mapping in pool for %s\n",
sid_string_dbg(map->sid)));
alloc_ctx.dom = dom;
alloc_ctx.map = map;
ret = dbwrap_trans_do(ctx->db, idmap_autorid_sid_to_id_alloc_action,
&alloc_ctx);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(1, ("Failed to create a new mapping in alloc range: %s\n",
nt_errstr(ret)));
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
map->status = ID_MAPPED;
return NT_STATUS_OK;
}
static bool idmap_autorid_domsid_is_for_alloc(struct dom_sid *sid)
{
bool match;
match = sid_check_is_wellknown_domain(sid, NULL);
if (match) {
return true;
}
return false;
}
static NTSTATUS idmap_autorid_sid_to_id(struct idmap_tdb_common_context *common,
struct idmap_domain *dom,
struct id_map *map)
{
struct autorid_global_config *global =
talloc_get_type_abort(common->private_data,
struct autorid_global_config);
struct autorid_range_config range;
uint32_t rid;
struct dom_sid domainsid;
NTSTATUS ret;
ZERO_STRUCT(range);
map->status = ID_UNKNOWN;
DEBUG(10, ("Trying to map %s\n", sid_string_dbg(map->sid)));
sid_copy(&domainsid, map->sid);
if (!sid_split_rid(&domainsid, &rid)) {
DEBUG(4, ("Could not determine domain SID from %s, "
"ignoring mapping request\n",
sid_string_dbg(map->sid)));
map->status = ID_UNMAPPED;
return NT_STATUS_NONE_MAPPED;
}
if (idmap_autorid_domsid_is_for_alloc(&domainsid)) {
DEBUG(10, ("SID %s is for ALLOC range.\n",
sid_string_dbg(map->sid)));
return idmap_autorid_sid_to_id_alloc(common, dom, map);
}
if (dom_sid_equal(&domainsid, &global_sid_Builtin) && ignore_builtin) {
DEBUG(10, ("Ignoring request for BUILTIN domain\n"));
map->status = ID_UNMAPPED;
return NT_STATUS_NONE_MAPPED;
}
sid_to_fstring(range.domsid, &domainsid);
range.domain_range_index = rid / (global->rangesize);
ret = idmap_autorid_getrange(autorid_db, range.domsid,
range.domain_range_index,
&range.rangenum, &range.low_id);
if (NT_STATUS_IS_OK(ret)) {
return idmap_autorid_sid_to_id_rid(
global->rangesize, range.low_id, map);
}
if (dom->read_only) {
DBG_DEBUG("read-only is enabled, did not allocate "
"new range for domain %s\n", range.domsid);
map->status = ID_UNMAPPED;
return NT_STATUS_NONE_MAPPED;
}
/*
* Check if we should allocate a domain range. We need to
* protect against unknown domains to not fill our ranges
* needlessly.
*/
if (sid_check_is_builtin(&domainsid) ||
sid_check_is_our_sam(&domainsid)) {
goto allocate;
}
{
struct winbindd_domain *domain;
/*
* Deterministic check for domain members: We can be
* sure that the domain we are member of is worth to
* add a mapping for.
*/
domain = find_our_domain();
if ((domain != NULL) &&
dom_sid_equal(&domain->sid, &domainsid)) {
goto allocate;
}
}
/*
* If we have already allocated range index 0, this domain is
* worth allocating for in higher ranges.
*/
if (range.domain_range_index != 0) {
uint32_t zero_rangenum, zero_low_id;
ret = idmap_autorid_getrange(autorid_db, range.domsid, 0,
&zero_rangenum, &zero_low_id);
if (NT_STATUS_IS_OK(ret)) {
goto allocate;
}
}
/*
* If the caller already did a lookup sid and made sure the
* domain sid is valid, we can allocate a new range.
*
* Currently the winbindd parent already does a lookup sids
* first, but hopefully changes in future. If the
* caller knows the domain sid, ID_TYPE_BOTH should be
* passed instead of ID_TYPE_NOT_SPECIFIED.
*/
if (map->xid.type != ID_TYPE_NOT_SPECIFIED) {
goto allocate;
}
/*
* Check of last resort: A domain is valid if a user from that
* domain has recently logged in. The samlogon_cache these
* days also stores the domain sid.
*
* We used to check the list of trusted domains we received
* from "our" dc, but this is not reliable enough.
*/
if (netsamlogon_cache_have(&domainsid)) {
goto allocate;
}
/*
* Nobody knows this domain, so refuse to allocate a fresh
* range.
*/
DBG_NOTICE("Allocating range for domain %s refused\n", range.domsid);
map->status = ID_UNMAPPED;
return NT_STATUS_NONE_MAPPED;
allocate:
ret = idmap_autorid_acquire_range(autorid_db, &range);
if (!NT_STATUS_IS_OK(ret)) {
DBG_NOTICE("Could not determine range for domain: %s, "
"check previous messages for reason\n",
nt_errstr(ret));
return ret;
}
return idmap_autorid_sid_to_id_rid(global->rangesize, range.low_id,
map);
}
/**********************************
lookup a set of sids.
**********************************/
static NTSTATUS idmap_autorid_sids_to_unixids(struct idmap_domain *dom,
struct id_map **ids)
{
struct idmap_tdb_common_context *commoncfg;
NTSTATUS ret;
int i;
int num_tomap = 0;
int num_mapped = 0;
/* initialize the status to avoid surprise */
for (i = 0; ids[i]; i++) {
ids[i]->status = ID_UNKNOWN;
num_tomap++;
}
commoncfg =
talloc_get_type_abort(dom->private_data,
struct idmap_tdb_common_context);
for (i = 0; ids[i]; i++) {
ret = idmap_autorid_sid_to_id(commoncfg, dom, ids[i]);
if ((!NT_STATUS_IS_OK(ret)) &&
(!NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) {
/* some fatal error occurred, log it */
DEBUG(3, ("Unexpected error resolving a SID (%s)\n",
sid_string_dbg(ids[i]->sid)));
return ret;
}
if (NT_STATUS_IS_OK(ret) && ids[i]->status == ID_MAPPED) {
num_mapped++;
}
}
if (num_tomap == num_mapped) {
return NT_STATUS_OK;
} else if (num_mapped == 0) {
return NT_STATUS_NONE_MAPPED;
}
return STATUS_SOME_UNMAPPED;
}
static NTSTATUS idmap_autorid_preallocate_wellknown(struct idmap_domain *dom)
{
const char *groups[] = { "S-1-1-0", "S-1-2-0", "S-1-2-1",
"S-1-3-0", "S-1-3-1", "S-1-3-2", "S-1-3-3", "S-1-3-4",
"S-1-5-1", "S-1-5-2", "S-1-5-3", "S-1-5-4", "S-1-5-6",
"S-1-5-7", "S-1-5-8", "S-1-5-9", "S-1-5-10", "S-1-5-11",
"S-1-5-12", "S-1-5-13", "S-1-5-14", "S-1-5-15",
"S-1-5-17", "S-1-5-18", "S-1-5-19", "S-1-5-20"
};
struct id_map **maps;
int i, num;
NTSTATUS status;
if (dom->read_only) {
return NT_STATUS_OK;
}
num = ARRAY_SIZE(groups);
maps = talloc_array(talloc_tos(), struct id_map*, num+1);
if (!maps) {
return NT_STATUS_NO_MEMORY;
}
for (i = 0; i < num; i++) {
maps[i] = talloc(maps, struct id_map);
if (maps[i] == NULL) {
talloc_free(maps);
return NT_STATUS_NO_MEMORY;
}
maps[i]->xid.type = ID_TYPE_GID;
maps[i]->sid = dom_sid_parse_talloc(maps, groups[i]);
}
maps[num] = NULL;
status = idmap_autorid_sids_to_unixids(dom, maps);
DEBUG(10,("Preallocation run finished with status %s\n",
nt_errstr(status)));
talloc_free(maps);
return NT_STATUS_IS_OK(status)?NT_STATUS_OK:NT_STATUS_UNSUCCESSFUL;
}
static NTSTATUS idmap_autorid_initialize_action(struct db_context *db,
void *private_data)
{
struct idmap_domain *dom;
struct idmap_tdb_common_context *common;
struct autorid_global_config *config;
NTSTATUS status;
dom = (struct idmap_domain *)private_data;
common = (struct idmap_tdb_common_context *)dom->private_data;
config = (struct autorid_global_config *)common->private_data;
status = idmap_autorid_init_hwms(db);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
status = idmap_autorid_saveconfig(db, config);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to store configuration data!\n"));
return status;
}
status = idmap_autorid_preallocate_wellknown(dom);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to preallocate wellknown sids: %s\n",
nt_errstr(status)));
return status;
}
return NT_STATUS_OK;
}
static NTSTATUS idmap_autorid_initialize(struct idmap_domain *dom)
{
struct idmap_tdb_common_context *commonconfig;
struct autorid_global_config *config;
NTSTATUS status;
char *db_path;
if (!strequal(dom->name, "*")) {
DEBUG(0, ("idmap_autorid_initialize: Error: autorid configured "
"for domain '%s'. But autorid can only be used for "
"the default idmap configuration.\n", dom->name));
return NT_STATUS_INVALID_PARAMETER;
}
commonconfig = talloc_zero(dom, struct idmap_tdb_common_context);
if (!commonconfig) {
DEBUG(0, ("Out of memory!\n"));
return NT_STATUS_NO_MEMORY;
}
dom->private_data = commonconfig;
commonconfig->rw_ops = talloc_zero(commonconfig, struct idmap_rw_ops);
if (commonconfig->rw_ops == NULL) {
DEBUG(0, ("Out of memory!\n"));
return NT_STATUS_NO_MEMORY;
}
config = talloc_zero(commonconfig, struct autorid_global_config);
if (!config) {
DEBUG(0, ("Out of memory!\n"));
return NT_STATUS_NO_MEMORY;
}
commonconfig->private_data = config;
config->minvalue = dom->low_id;
config->rangesize = idmap_config_int("*", "rangesize", 100000);
config->maxranges = (dom->high_id - dom->low_id + 1) /
config->rangesize;
if (config->maxranges == 0) {
DEBUG(1, ("Allowed uid range is smaller than rangesize. "
"Increase uid range or decrease rangesize.\n"));
status = NT_STATUS_INVALID_PARAMETER;
goto error;
}
/* check if the high-low limit is a multiple of the rangesize */
if ((dom->high_id - dom->low_id + 1) % config->rangesize != 0) {
DEBUG(5, ("High uid-low uid difference of %d "
"is not a multiple of the rangesize %d, "
"limiting ranges to lower boundary number of %d\n",
(dom->high_id - dom->low_id + 1), config->rangesize,
config->maxranges));
}
DEBUG(5, ("%d domain ranges with a size of %d are available\n",
config->maxranges, config->rangesize));
ignore_builtin = idmap_config_bool("*", "ignore builtin", false);
/* fill the TDB common configuration */
commonconfig->max_id = config->rangesize - 1
- IDMAP_AUTORID_ALLOC_RESERVED;
commonconfig->hwmkey_uid = ALLOC_HWM_UID;
commonconfig->hwmkey_gid = ALLOC_HWM_GID;
commonconfig->rw_ops->get_new_id = idmap_autorid_allocate_id;
commonconfig->rw_ops->set_mapping = idmap_tdb_common_set_mapping;
db_path = state_path("autorid.tdb");
if (db_path == NULL) {
status = NT_STATUS_NO_MEMORY;
goto error;
}
status = idmap_autorid_db_open(db_path,
NULL, /* TALLOC_CTX */
&autorid_db);
TALLOC_FREE(db_path);
if (!NT_STATUS_IS_OK(status)) {
goto error;
}
commonconfig->db = autorid_db;
status = dbwrap_trans_do(autorid_db,
idmap_autorid_initialize_action,
dom);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to init the idmap database: %s\n",
nt_errstr(status)));
goto error;
}
goto done;
error:
talloc_free(config);
done:
return status;
}
/*
Close the idmap tdb instance
*/
static struct idmap_methods autorid_methods = {
.init = idmap_autorid_initialize,
.unixids_to_sids = idmap_autorid_unixids_to_sids,
.sids_to_unixids = idmap_autorid_sids_to_unixids,
.allocate_id = idmap_autorid_allocate_id
};
static_decl_idmap;
NTSTATUS idmap_autorid_init(TALLOC_CTX *ctx)
{
return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION,
"autorid", &autorid_methods);
}