1
0
mirror of https://github.com/samba-team/samba.git synced 2024-12-24 21:34:56 +03:00
samba-mirror/source3/nsswitch/idmap_tdb.c
2007-10-10 12:28:22 -05:00

1233 lines
30 KiB
C

/*
Unix SMB/CIFS implementation.
idmap TDB backend
Copyright (C) Tim Potter 2000
Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
Copyright (C) Jeremy Allison 2006
Copyright (C) Simo Sorce 2003-2006
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/>.
*/
#include "includes.h"
#include "winbindd.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_IDMAP
/* High water mark keys */
#define HWM_GROUP "GROUP HWM"
#define HWM_USER "USER HWM"
static struct idmap_tdb_state {
/* User and group id pool */
uid_t low_uid, high_uid; /* Range of uids to allocate */
gid_t low_gid, high_gid; /* Range of gids to allocate */
} idmap_tdb_state;
/*****************************************************************************
For idmap conversion: convert one record to new format
Ancient versions (eg 2.2.3a) of winbindd_idmap.tdb mapped DOMAINNAME/rid
instead of the SID.
*****************************************************************************/
static int convert_fn(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA data, void *state)
{
struct winbindd_domain *domain;
char *p;
DOM_SID sid;
uint32 rid;
fstring keystr;
fstring dom_name;
TDB_DATA key2;
BOOL *failed = (BOOL *)state;
DEBUG(10,("Converting %s\n", (const char *)key.dptr));
p = strchr((const char *)key.dptr, '/');
if (!p)
return 0;
*p = 0;
fstrcpy(dom_name, (const char *)key.dptr);
*p++ = '/';
domain = find_domain_from_name(dom_name);
if (domain == NULL) {
/* We must delete the old record. */
DEBUG(0,("Unable to find domain %s\n", dom_name ));
DEBUG(0,("deleting record %s\n", (const char *)key.dptr ));
if (tdb_delete(tdb, key) != 0) {
DEBUG(0, ("Unable to delete record %s\n", (const char *)key.dptr));
*failed = True;
return -1;
}
return 0;
}
rid = atoi(p);
sid_copy(&sid, &domain->sid);
sid_append_rid(&sid, rid);
sid_to_string(keystr, &sid);
key2 = string_term_tdb_data(keystr);
if (tdb_store(tdb, key2, data, TDB_INSERT) != 0) {
DEBUG(0,("Unable to add record %s\n", (const char *)key2.dptr ));
*failed = True;
return -1;
}
if (tdb_store(tdb, data, key2, TDB_REPLACE) != 0) {
DEBUG(0,("Unable to update record %s\n", (const char *)data.dptr ));
*failed = True;
return -1;
}
if (tdb_delete(tdb, key) != 0) {
DEBUG(0,("Unable to delete record %s\n", (const char *)key.dptr ));
*failed = True;
return -1;
}
return 0;
}
/*****************************************************************************
Convert the idmap database from an older version.
*****************************************************************************/
static BOOL idmap_tdb_upgrade(const char *idmap_name)
{
int32 vers;
BOOL bigendianheader;
BOOL failed = False;
TDB_CONTEXT *idmap_tdb;
DEBUG(0, ("Upgrading winbindd_idmap.tdb from an old version\n"));
if (!(idmap_tdb = tdb_open_log(idmap_name, 0,
TDB_DEFAULT, O_RDWR,
0600))) {
DEBUG(0, ("Unable to open idmap database\n"));
return False;
}
bigendianheader = (tdb_get_flags(idmap_tdb) & TDB_BIGENDIAN) ? True : False;
vers = tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION");
if (((vers == -1) && bigendianheader) || (IREV(vers) == IDMAP_VERSION)) {
/* Arrggghh ! Bytereversed or old big-endian - make order independent ! */
/*
* high and low records were created on a
* big endian machine and will need byte-reversing.
*/
int32 wm;
wm = tdb_fetch_int32(idmap_tdb, HWM_USER);
if (wm != -1) {
wm = IREV(wm);
} else {
wm = idmap_tdb_state.low_uid;
}
if (tdb_store_int32(idmap_tdb, HWM_USER, wm) == -1) {
DEBUG(0, ("Unable to byteswap user hwm in idmap database\n"));
tdb_close(idmap_tdb);
return False;
}
wm = tdb_fetch_int32(idmap_tdb, HWM_GROUP);
if (wm != -1) {
wm = IREV(wm);
} else {
wm = idmap_tdb_state.low_gid;
}
if (tdb_store_int32(idmap_tdb, HWM_GROUP, wm) == -1) {
DEBUG(0, ("Unable to byteswap group hwm in idmap database\n"));
tdb_close(idmap_tdb);
return False;
}
}
/* the old format stored as DOMAIN/rid - now we store the SID direct */
tdb_traverse(idmap_tdb, convert_fn, &failed);
if (failed) {
DEBUG(0, ("Problem during conversion\n"));
tdb_close(idmap_tdb);
return False;
}
if (tdb_store_int32(idmap_tdb, "IDMAP_VERSION", IDMAP_VERSION) == -1) {
DEBUG(0, ("Unable to dtore idmap version in databse\n"));
tdb_close(idmap_tdb);
return False;
}
tdb_close(idmap_tdb);
return True;
}
/* WARNING: We can't open a tdb twice inthe same process, for that reason
* I'm going to use a hack with open ref counts to open the winbindd_idmap.tdb
* only once. We will later decide whether to split the db in multiple files
* or come up with a better solution to share them. */
static TDB_CONTEXT *idmap_tdb_common_ctx;
static int idmap_tdb_open_ref_count = 0;
static NTSTATUS idmap_tdb_open_db(TALLOC_CTX *memctx, TDB_CONTEXT **tdbctx)
{
NTSTATUS ret;
TALLOC_CTX *ctx;
SMB_STRUCT_STAT stbuf;
char *tdbfile = NULL;
int32 version;
BOOL tdb_is_new = False;
if (idmap_tdb_open_ref_count) { /* the tdb has already been opened */
idmap_tdb_open_ref_count++;
*tdbctx = idmap_tdb_common_ctx;
return NT_STATUS_OK;
}
/* use our own context here */
ctx = talloc_new(memctx);
if (!ctx) {
DEBUG(0, ("Out of memory!\n"));
return NT_STATUS_NO_MEMORY;
}
/* use the old database if present */
tdbfile = talloc_strdup(ctx, lock_path("winbindd_idmap.tdb"));
if (!tdbfile) {
DEBUG(0, ("Out of memory!\n"));
ret = NT_STATUS_NO_MEMORY;
goto done;
}
if (!file_exist(tdbfile, &stbuf)) {
tdb_is_new = True;
}
DEBUG(10,("Opening tdbfile %s\n", tdbfile ));
/* Open idmap repository */
if (!(idmap_tdb_common_ctx = tdb_open_log(tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644))) {
DEBUG(0, ("Unable to open idmap database\n"));
ret = NT_STATUS_UNSUCCESSFUL;
goto done;
}
if (tdb_is_new) {
/* the file didn't existed before opening it, let's
* store idmap version as nobody else yet opened and
* stored it. I do not like this method but didn't
* found a way to understand if an opened tdb have
* been just created or not --- SSS */
tdb_store_int32(idmap_tdb_common_ctx, "IDMAP_VERSION", IDMAP_VERSION);
}
/* check against earlier versions */
version = tdb_fetch_int32(idmap_tdb_common_ctx, "IDMAP_VERSION");
if (version != IDMAP_VERSION) {
/* backup_tdb expects the tdb not to be open */
tdb_close(idmap_tdb_common_ctx);
if ( ! idmap_tdb_upgrade(tdbfile)) {
DEBUG(0, ("Unable to open idmap database, it's in an old formati, and upgrade failed!\n"));
ret = NT_STATUS_INTERNAL_DB_ERROR;
goto done;
}
/* Re-Open idmap repository */
if (!(idmap_tdb_common_ctx = tdb_open_log(tdbfile, 0, TDB_DEFAULT, O_RDWR | O_CREAT, 0644))) {
DEBUG(0, ("Unable to open idmap database\n"));
ret = NT_STATUS_UNSUCCESSFUL;
goto done;
}
}
*tdbctx = idmap_tdb_common_ctx;
idmap_tdb_open_ref_count++;
ret = NT_STATUS_OK;
done:
talloc_free(ctx);
return ret;
}
/* NEVER use tdb_close() except for the conversion routines that are guaranteed
* to run only when the database is opened the first time, always use this function. */
BOOL idmap_tdb_tdb_close(TDB_CONTEXT *tdbctx)
{
if (tdbctx != idmap_tdb_common_ctx) {
DEBUG(0, ("ERROR: Invalid tdb context!"));
return False;
}
idmap_tdb_open_ref_count--;
if (idmap_tdb_open_ref_count) {
return True;
}
return tdb_close(idmap_tdb_common_ctx);
}
/**********************************************************************
IDMAP ALLOC TDB BACKEND
**********************************************************************/
static TDB_CONTEXT *idmap_alloc_tdb;
/**********************************
Initialise idmap alloc database.
**********************************/
static NTSTATUS idmap_tdb_alloc_init( const char *params )
{
NTSTATUS ret;
TALLOC_CTX *ctx;
const char *range;
uid_t low_uid = 0;
uid_t high_uid = 0;
gid_t low_gid = 0;
gid_t high_gid = 0;
/* use our own context here */
ctx = talloc_new(NULL);
if (!ctx) {
DEBUG(0, ("Out of memory!\n"));
return NT_STATUS_NO_MEMORY;
}
ret = idmap_tdb_open_db(ctx, &idmap_alloc_tdb);
if ( ! NT_STATUS_IS_OK(ret)) {
talloc_free(ctx);
return ret;
}
talloc_free(ctx);
/* load ranges */
idmap_tdb_state.low_uid = 0;
idmap_tdb_state.high_uid = 0;
idmap_tdb_state.low_gid = 0;
idmap_tdb_state.high_gid = 0;
range = lp_parm_const_string(-1, "idmap alloc config", "range", NULL);
if (range && range[0]) {
unsigned low_id, high_id;
if (sscanf(range, "%u - %u", &low_id, &high_id) == 2) {
if (low_id < high_id) {
idmap_tdb_state.low_gid = idmap_tdb_state.low_uid = low_id;
idmap_tdb_state.high_gid = idmap_tdb_state.high_uid = high_id;
} else {
DEBUG(1, ("ERROR: invalid idmap alloc range [%s]", range));
}
} else {
DEBUG(1, ("ERROR: invalid syntax for idmap alloc config:range [%s]", range));
}
}
/* Create high water marks for group and user id */
if (lp_idmap_uid(&low_uid, &high_uid)) {
idmap_tdb_state.low_uid = low_uid;
idmap_tdb_state.high_uid = high_uid;
}
if (lp_idmap_gid(&low_gid, &high_gid)) {
idmap_tdb_state.low_gid = low_gid;
idmap_tdb_state.high_gid = high_gid;
}
if (idmap_tdb_state.high_uid <= idmap_tdb_state.low_uid) {
DEBUG(1, ("idmap uid range missing or invalid\n"));
DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
return NT_STATUS_UNSUCCESSFUL;
} else {
uint32 low_id;
if (((low_id = tdb_fetch_int32(idmap_alloc_tdb, HWM_USER)) == -1) ||
(low_id < idmap_tdb_state.low_uid)) {
if (tdb_store_int32(idmap_alloc_tdb, HWM_USER, idmap_tdb_state.low_uid) == -1) {
DEBUG(0, ("Unable to initialise user hwm in idmap database\n"));
return NT_STATUS_INTERNAL_DB_ERROR;
}
}
}
if (idmap_tdb_state.high_gid <= idmap_tdb_state.low_gid) {
DEBUG(1, ("idmap gid range missing or invalid\n"));
DEBUGADD(1, ("idmap will be unable to map foreign SIDs\n"));
return NT_STATUS_UNSUCCESSFUL;
} else {
uint32 low_id;
if (((low_id = tdb_fetch_int32(idmap_alloc_tdb, HWM_GROUP)) == -1) ||
(low_id < idmap_tdb_state.low_gid)) {
if (tdb_store_int32(idmap_alloc_tdb, HWM_GROUP, idmap_tdb_state.low_gid) == -1) {
DEBUG(0, ("Unable to initialise group hwm in idmap database\n"));
return NT_STATUS_INTERNAL_DB_ERROR;
}
}
}
return NT_STATUS_OK;
}
/**********************************
Allocate a new id.
**********************************/
static NTSTATUS idmap_tdb_allocate_id(struct unixid *xid)
{
BOOL ret;
const char *hwmkey;
const char *hwmtype;
uint32_t high_hwm;
uint32_t hwm;
/* Get current high water mark */
switch (xid->type) {
case ID_TYPE_UID:
hwmkey = HWM_USER;
hwmtype = "UID";
high_hwm = idmap_tdb_state.high_uid;
break;
case ID_TYPE_GID:
hwmkey = HWM_GROUP;
hwmtype = "GID";
high_hwm = idmap_tdb_state.high_gid;
break;
default:
DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
return NT_STATUS_INVALID_PARAMETER;
}
if ((hwm = tdb_fetch_int32(idmap_alloc_tdb, hwmkey)) == -1) {
return NT_STATUS_INTERNAL_DB_ERROR;
}
/* check it is in the range */
if (hwm > high_hwm) {
DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
hwmtype, (unsigned long)high_hwm));
return NT_STATUS_UNSUCCESSFUL;
}
/* fetch a new id and increment it */
ret = tdb_change_uint32_atomic(idmap_alloc_tdb, hwmkey, &hwm, 1);
if (!ret) {
DEBUG(1, ("Fatal error while fetching a new %s value\n!", hwmtype));
return NT_STATUS_UNSUCCESSFUL;
}
/* recheck it is in the range */
if (hwm > high_hwm) {
DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
hwmtype, (unsigned long)high_hwm));
return NT_STATUS_UNSUCCESSFUL;
}
xid->id = hwm;
DEBUG(10,("New %s = %d\n", hwmtype, hwm));
return NT_STATUS_OK;
}
/**********************************
Get current highest id.
**********************************/
static NTSTATUS idmap_tdb_get_hwm(struct unixid *xid)
{
const char *hwmkey;
const char *hwmtype;
uint32_t hwm;
uint32_t high_hwm;
/* Get current high water mark */
switch (xid->type) {
case ID_TYPE_UID:
hwmkey = HWM_USER;
hwmtype = "UID";
high_hwm = idmap_tdb_state.high_uid;
break;
case ID_TYPE_GID:
hwmkey = HWM_GROUP;
hwmtype = "GID";
high_hwm = idmap_tdb_state.high_gid;
break;
default:
return NT_STATUS_INVALID_PARAMETER;
}
if ((hwm = tdb_fetch_int32(idmap_alloc_tdb, hwmkey)) == -1) {
return NT_STATUS_INTERNAL_DB_ERROR;
}
xid->id = hwm;
/* Warn if it is out of range */
if (hwm >= high_hwm) {
DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
hwmtype, (unsigned long)high_hwm));
}
return NT_STATUS_OK;
}
/**********************************
Set high id.
**********************************/
static NTSTATUS idmap_tdb_set_hwm(struct unixid *xid)
{
const char *hwmkey;
const char *hwmtype;
uint32_t hwm;
uint32_t high_hwm;
/* Get current high water mark */
switch (xid->type) {
case ID_TYPE_UID:
hwmkey = HWM_USER;
hwmtype = "UID";
high_hwm = idmap_tdb_state.high_uid;
break;
case ID_TYPE_GID:
hwmkey = HWM_GROUP;
hwmtype = "GID";
high_hwm = idmap_tdb_state.high_gid;
break;
default:
return NT_STATUS_INVALID_PARAMETER;
}
hwm = xid->id;
if ((hwm = tdb_store_int32(idmap_alloc_tdb, hwmkey, hwm)) == -1) {
return NT_STATUS_INTERNAL_DB_ERROR;
}
/* Warn if it is out of range */
if (hwm >= high_hwm) {
DEBUG(0, ("Warning: %s range full!! (max: %lu)\n",
hwmtype, (unsigned long)high_hwm));
}
return NT_STATUS_OK;
}
/**********************************
Close the alloc tdb
**********************************/
static NTSTATUS idmap_tdb_alloc_close(void)
{
if (idmap_alloc_tdb) {
if (idmap_tdb_tdb_close(idmap_alloc_tdb) == 0) {
return NT_STATUS_OK;
} else {
return NT_STATUS_UNSUCCESSFUL;
}
}
return NT_STATUS_OK;
}
/**********************************************************************
IDMAP MAPPING TDB BACKEND
**********************************************************************/
struct idmap_tdb_context {
TDB_CONTEXT *tdb;
uint32_t filter_low_id;
uint32_t filter_high_id;
};
/*****************************
Initialise idmap database.
*****************************/
static NTSTATUS idmap_tdb_db_init(struct idmap_domain *dom)
{
NTSTATUS ret;
struct idmap_tdb_context *ctx;
char *config_option = NULL;
const char *range;
ctx = talloc(dom, struct idmap_tdb_context);
if ( ! ctx) {
DEBUG(0, ("Out of memory!\n"));
return NT_STATUS_NO_MEMORY;
}
config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
if ( ! config_option) {
DEBUG(0, ("Out of memory!\n"));
ret = NT_STATUS_NO_MEMORY;
goto failed;
}
ret = idmap_tdb_open_db(ctx, &ctx->tdb);
if ( ! NT_STATUS_IS_OK(ret)) {
goto failed;
}
range = lp_parm_const_string(-1, config_option, "range", NULL);
if (( ! range) ||
(sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2) ||
(ctx->filter_low_id > ctx->filter_high_id)) {
ctx->filter_low_id = 0;
ctx->filter_high_id = 0;
}
dom->private_data = ctx;
dom->initialized = True;
talloc_free(config_option);
return NT_STATUS_OK;
failed:
talloc_free(ctx);
return ret;
}
/**********************************
Single id to sid lookup function.
**********************************/
static NTSTATUS idmap_tdb_id_to_sid(struct idmap_tdb_context *ctx, struct id_map *map)
{
NTSTATUS ret;
TDB_DATA data;
char *keystr;
if (!ctx || !map) {
return NT_STATUS_INVALID_PARAMETER;
}
/* apply filters before checking */
if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
(ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
return NT_STATUS_NONE_MAPPED;
}
switch (map->xid.type) {
case ID_TYPE_UID:
keystr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
break;
case ID_TYPE_GID:
keystr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
break;
default:
DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
return NT_STATUS_INVALID_PARAMETER;
}
/* final SAFE_FREE safe */
data.dptr = NULL;
if (keystr == NULL) {
DEBUG(0, ("Out of memory!\n"));
ret = NT_STATUS_NO_MEMORY;
goto done;
}
DEBUG(10,("Fetching record %s\n", keystr));
/* Check if the mapping exists */
data = tdb_fetch_bystring(ctx->tdb, keystr);
if (!data.dptr) {
DEBUG(10,("Record %s not found\n", keystr));
ret = NT_STATUS_NONE_MAPPED;
goto done;
}
if (!string_to_sid(map->sid, (const char *)data.dptr)) {
DEBUG(10,("INVALID SID (%s) in record %s\n",
(const char *)data.dptr, keystr));
ret = NT_STATUS_INTERNAL_DB_ERROR;
goto done;
}
DEBUG(10,("Found record %s -> %s\n", keystr, (const char *)data.dptr));
ret = NT_STATUS_OK;
done:
SAFE_FREE(data.dptr);
talloc_free(keystr);
return ret;
}
/**********************************
Single sid to id lookup function.
**********************************/
static NTSTATUS idmap_tdb_sid_to_id(struct idmap_tdb_context *ctx, struct id_map *map)
{
NTSTATUS ret;
TDB_DATA data;
char *keystr;
unsigned long rec_id = 0;
if ((keystr = talloc_asprintf(ctx, "%s", sid_string_static(map->sid))) == NULL) {
DEBUG(0, ("Out of memory!\n"));
ret = NT_STATUS_NO_MEMORY;
goto done;
}
DEBUG(10,("Fetching record %s\n", keystr));
/* Check if sid is present in database */
data = tdb_fetch_bystring(ctx->tdb, keystr);
if (!data.dptr) {
DEBUG(10,("Record %s not found\n", keystr));
ret = NT_STATUS_NONE_MAPPED;
goto done;
}
/* What type of record is this ? */
if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) { /* Try a UID record. */
map->xid.id = rec_id;
map->xid.type = ID_TYPE_UID;
DEBUG(10,("Found uid record %s -> %s \n", keystr, (const char *)data.dptr ));
ret = NT_STATUS_OK;
} else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) { /* Try a GID record. */
map->xid.id = rec_id;
map->xid.type = ID_TYPE_GID;
DEBUG(10,("Found gid record %s -> %s \n", keystr, (const char *)data.dptr ));
ret = NT_STATUS_OK;
} else { /* Unknown record type ! */
DEBUG(2, ("Found INVALID record %s -> %s\n", keystr, (const char *)data.dptr));
ret = NT_STATUS_INTERNAL_DB_ERROR;
}
SAFE_FREE(data.dptr);
/* apply filters before returning result */
if ((ctx->filter_low_id && (map->xid.id < ctx->filter_low_id)) ||
(ctx->filter_high_id && (map->xid.id > ctx->filter_high_id))) {
DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
map->xid.id, ctx->filter_low_id, ctx->filter_high_id));
ret = NT_STATUS_NONE_MAPPED;
}
done:
talloc_free(keystr);
return ret;
}
/**********************************
lookup a set of unix ids.
**********************************/
static NTSTATUS idmap_tdb_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
{
struct idmap_tdb_context *ctx;
NTSTATUS ret;
int i;
/* make sure we initialized */
if ( ! dom->initialized) {
ret = idmap_tdb_db_init(dom);
if ( ! NT_STATUS_IS_OK(ret)) {
return ret;
}
}
ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
for (i = 0; ids[i]; i++) {
ret = idmap_tdb_id_to_sid(ctx, ids[i]);
if ( ! NT_STATUS_IS_OK(ret)) {
/* if it is just a failed mapping continue */
if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
/* make sure it is marked as unmapped */
ids[i]->status = ID_UNMAPPED;
continue;
}
/* some fatal error occurred, return immediately */
goto done;
}
/* all ok, id is mapped */
ids[i]->status = ID_MAPPED;
}
ret = NT_STATUS_OK;
done:
return ret;
}
/**********************************
lookup a set of sids.
**********************************/
static NTSTATUS idmap_tdb_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
{
struct idmap_tdb_context *ctx;
NTSTATUS ret;
int i;
/* make sure we initialized */
if ( ! dom->initialized) {
ret = idmap_tdb_db_init(dom);
if ( ! NT_STATUS_IS_OK(ret)) {
return ret;
}
}
ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
for (i = 0; ids[i]; i++) {
ret = idmap_tdb_sid_to_id(ctx, ids[i]);
if ( ! NT_STATUS_IS_OK(ret)) {
/* if it is just a failed mapping continue */
if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
/* make sure it is marked as unmapped */
ids[i]->status = ID_UNMAPPED;
continue;
}
/* some fatal error occurred, return immediately */
goto done;
}
/* all ok, id is mapped */
ids[i]->status = ID_MAPPED;
}
ret = NT_STATUS_OK;
done:
return ret;
}
/**********************************
set a mapping.
**********************************/
static NTSTATUS idmap_tdb_set_mapping(struct idmap_domain *dom, const struct id_map *map)
{
struct idmap_tdb_context *ctx;
NTSTATUS ret;
TDB_DATA ksid, kid, data;
char *ksidstr, *kidstr;
/* make sure we initialized */
if ( ! dom->initialized) {
ret = idmap_tdb_db_init(dom);
if ( ! NT_STATUS_IS_OK(ret)) {
return ret;
}
}
if (!map || !map->sid) {
return NT_STATUS_INVALID_PARAMETER;
}
ksidstr = kidstr = NULL;
data.dptr = NULL;
/* TODO: should we filter a set_mapping using low/high filters ? */
ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
switch (map->xid.type) {
case ID_TYPE_UID:
kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
break;
case ID_TYPE_GID:
kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
break;
default:
DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
return NT_STATUS_INVALID_PARAMETER;
}
if (kidstr == NULL) {
DEBUG(0, ("ERROR: Out of memory!\n"));
ret = NT_STATUS_NO_MEMORY;
goto done;
}
if ((ksidstr = talloc_asprintf(ctx, "%s", sid_string_static(map->sid))) == NULL) {
DEBUG(0, ("Out of memory!\n"));
ret = NT_STATUS_NO_MEMORY;
goto done;
}
DEBUG(10, ("Storing %s <-> %s map\n", ksidstr, kidstr));
kid = string_term_tdb_data(kidstr);
ksid = string_term_tdb_data(ksidstr);
/* *DELETE* previous mappings if any.
* This is done both SID and [U|G]ID passed in */
/* Lock the record for this SID. */
if (tdb_chainlock(ctx->tdb, ksid) != 0) {
DEBUG(10,("Failed to lock record %s. Error %s\n",
ksidstr, tdb_errorstr(ctx->tdb) ));
return NT_STATUS_UNSUCCESSFUL;
}
data = tdb_fetch(ctx->tdb, ksid);
if (data.dptr) {
DEBUG(10, ("Deleting existing mapping %s <-> %s\n", (const char *)data.dptr, ksidstr ));
tdb_delete(ctx->tdb, data);
tdb_delete(ctx->tdb, ksid);
SAFE_FREE(data.dptr);
}
data = tdb_fetch(ctx->tdb, kid);
if (data.dptr) {
DEBUG(10,("Deleting existing mapping %s <-> %s\n", (const char *)data.dptr, kidstr ));
tdb_delete(ctx->tdb, data);
tdb_delete(ctx->tdb, kid);
SAFE_FREE(data.dptr);
}
if (tdb_store(ctx->tdb, ksid, kid, TDB_INSERT) == -1) {
DEBUG(0, ("Error storing SID -> ID: %s\n", tdb_errorstr(ctx->tdb)));
tdb_chainunlock(ctx->tdb, ksid);
ret = NT_STATUS_UNSUCCESSFUL;
goto done;
}
if (tdb_store(ctx->tdb, kid, ksid, TDB_INSERT) == -1) {
DEBUG(0, ("Error stroing ID -> SID: %s\n", tdb_errorstr(ctx->tdb)));
/* try to remove the previous stored SID -> ID map */
tdb_delete(ctx->tdb, ksid);
tdb_chainunlock(ctx->tdb, ksid);
ret = NT_STATUS_UNSUCCESSFUL;
goto done;
}
tdb_chainunlock(ctx->tdb, ksid);
DEBUG(10,("Stored %s <-> %s\n", ksidstr, kidstr));
ret = NT_STATUS_OK;
done:
talloc_free(ksidstr);
talloc_free(kidstr);
SAFE_FREE(data.dptr);
return ret;
}
/**********************************
remove a mapping.
**********************************/
static NTSTATUS idmap_tdb_remove_mapping(struct idmap_domain *dom, const struct id_map *map)
{
struct idmap_tdb_context *ctx;
NTSTATUS ret;
TDB_DATA ksid, kid, data;
char *ksidstr, *kidstr;
/* make sure we initialized */
if ( ! dom->initialized) {
ret = idmap_tdb_db_init(dom);
if ( ! NT_STATUS_IS_OK(ret)) {
return ret;
}
}
if (!map || !map->sid) {
return NT_STATUS_INVALID_PARAMETER;
}
ksidstr = kidstr = NULL;
data.dptr = NULL;
/* TODO: should we filter a remove_mapping using low/high filters ? */
ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
switch (map->xid.type) {
case ID_TYPE_UID:
kidstr = talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
break;
case ID_TYPE_GID:
kidstr = talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
break;
default:
DEBUG(2, ("INVALID unix ID type: 0x02%x\n", map->xid.type));
return NT_STATUS_INVALID_PARAMETER;
}
if (kidstr == NULL) {
DEBUG(0, ("ERROR: Out of memory!\n"));
ret = NT_STATUS_NO_MEMORY;
goto done;
}
if ((ksidstr = talloc_asprintf(ctx, "%s", sid_string_static(map->sid))) == NULL) {
DEBUG(0, ("Out of memory!\n"));
ret = NT_STATUS_NO_MEMORY;
goto done;
}
DEBUG(10, ("Checking %s <-> %s map\n", ksidstr, kidstr));
ksid = string_term_tdb_data(ksidstr);
kid = string_term_tdb_data(kidstr);
/* Lock the record for this SID. */
if (tdb_chainlock(ctx->tdb, ksid) != 0) {
DEBUG(10,("Failed to lock record %s. Error %s\n",
ksidstr, tdb_errorstr(ctx->tdb) ));
return NT_STATUS_UNSUCCESSFUL;
}
/* Check if sid is present in database */
data = tdb_fetch(ctx->tdb, ksid);
if (!data.dptr) {
DEBUG(10,("Record %s not found\n", ksidstr));
tdb_chainunlock(ctx->tdb, ksid);
ret = NT_STATUS_NONE_MAPPED;
goto done;
}
/* Check if sid is mapped to the specified ID */
if ((data.dsize != kid.dsize) ||
(memcmp(data.dptr, kid.dptr, data.dsize) != 0)) {
DEBUG(10,("Specified SID does not map to specified ID\n"));
DEBUGADD(10,("Actual mapping is %s -> %s\n", ksidstr, (const char *)data.dptr));
tdb_chainunlock(ctx->tdb, ksid);
ret = NT_STATUS_NONE_MAPPED;
goto done;
}
DEBUG(10, ("Removing %s <-> %s map\n", ksidstr, kidstr));
/* Delete previous mappings. */
DEBUG(10, ("Deleting existing mapping %s -> %s\n", ksidstr, kidstr ));
tdb_delete(ctx->tdb, ksid);
DEBUG(10,("Deleting existing mapping %s -> %s\n", kidstr, ksidstr ));
tdb_delete(ctx->tdb, kid);
tdb_chainunlock(ctx->tdb, ksid);
ret = NT_STATUS_OK;
done:
talloc_free(ksidstr);
talloc_free(kidstr);
SAFE_FREE(data.dptr);
return ret;
}
/**********************************
Close the idmap tdb instance
**********************************/
static NTSTATUS idmap_tdb_close(struct idmap_domain *dom)
{
struct idmap_tdb_context *ctx;
if (dom->private_data) {
ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
if (idmap_tdb_tdb_close(ctx->tdb) == 0) {
return NT_STATUS_OK;
} else {
return NT_STATUS_UNSUCCESSFUL;
}
}
return NT_STATUS_OK;
}
struct dump_data {
TALLOC_CTX *memctx;
struct id_map **maps;
int *num_maps;
NTSTATUS ret;
};
static int idmap_tdb_dump_one_entry(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA value, void *pdata)
{
struct dump_data *data = talloc_get_type(pdata, struct dump_data);
struct id_map *maps;
int num_maps = *data->num_maps;
/* ignore any record but the ones with a SID as key */
if (strncmp((const char *)key.dptr, "S-", 2) == 0) {
maps = talloc_realloc(NULL, *data->maps, struct id_map, num_maps+1);
if ( ! maps) {
DEBUG(0, ("Out of memory!\n"));
data->ret = NT_STATUS_NO_MEMORY;
return -1;
}
*data->maps = maps;
maps[num_maps].sid = talloc(maps, DOM_SID);
if ( ! maps[num_maps].sid) {
DEBUG(0, ("Out of memory!\n"));
data->ret = NT_STATUS_NO_MEMORY;
return -1;
}
if (!string_to_sid(maps[num_maps].sid, (const char *)key.dptr)) {
DEBUG(10,("INVALID record %s\n", (const char *)key.dptr));
/* continue even with errors */
return 0;
}
/* Try a UID record. */
if (sscanf((const char *)value.dptr, "UID %u", &(maps[num_maps].xid.id)) == 1) {
maps[num_maps].xid.type = ID_TYPE_UID;
maps[num_maps].status = ID_MAPPED;
*data->num_maps = num_maps + 1;
/* Try a GID record. */
} else
if (sscanf((const char *)value.dptr, "GID %u", &(maps[num_maps].xid.id)) == 1) {
maps[num_maps].xid.type = ID_TYPE_GID;
maps[num_maps].status = ID_MAPPED;
*data->num_maps = num_maps + 1;
/* Unknown record type ! */
} else {
maps[num_maps].status = ID_UNKNOWN;
DEBUG(2, ("Found INVALID record %s -> %s\n",
(const char *)key.dptr, (const char *)value.dptr));
/* do not increment num_maps */
}
}
return 0;
}
/**********************************
Dump all mappings out
**********************************/
static NTSTATUS idmap_tdb_dump_data(struct idmap_domain *dom, struct id_map **maps, int *num_maps)
{
struct idmap_tdb_context *ctx;
struct dump_data *data;
NTSTATUS ret = NT_STATUS_OK;
/* make sure we initialized */
if ( ! dom->initialized) {
ret = idmap_tdb_db_init(dom);
if ( ! NT_STATUS_IS_OK(ret)) {
return ret;
}
}
ctx = talloc_get_type(dom->private_data, struct idmap_tdb_context);
data = TALLOC_ZERO_P(ctx, struct dump_data);
if ( ! data) {
DEBUG(0, ("Out of memory!\n"));
return NT_STATUS_NO_MEMORY;
}
data->maps = maps;
data->num_maps = num_maps;
data->ret = NT_STATUS_OK;
tdb_traverse(ctx->tdb, idmap_tdb_dump_one_entry, data);
if ( ! NT_STATUS_IS_OK(data->ret)) {
ret = data->ret;
}
talloc_free(data);
return ret;
}
static struct idmap_methods db_methods = {
.init = idmap_tdb_db_init,
.unixids_to_sids = idmap_tdb_unixids_to_sids,
.sids_to_unixids = idmap_tdb_sids_to_unixids,
.set_mapping = idmap_tdb_set_mapping,
.remove_mapping = idmap_tdb_remove_mapping,
.dump_data = idmap_tdb_dump_data,
.close_fn = idmap_tdb_close
};
static struct idmap_alloc_methods db_alloc_methods = {
.init = idmap_tdb_alloc_init,
.allocate_id = idmap_tdb_allocate_id,
.get_id_hwm = idmap_tdb_get_hwm,
.set_id_hwm = idmap_tdb_set_hwm,
.close_fn = idmap_tdb_alloc_close
};
NTSTATUS idmap_alloc_tdb_init(void)
{
return smb_register_idmap_alloc(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_alloc_methods);
}
NTSTATUS idmap_tdb_init(void)
{
NTSTATUS ret;
/* FIXME: bad hack to actually register also the alloc_tdb module without changining configure.in */
ret = idmap_alloc_tdb_init();
if (! NT_STATUS_IS_OK(ret)) {
return ret;
}
return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb", &db_methods);
}