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samba-mirror/source3/winbindd/idmap_tdb2.c
Christof Schmitt 7f2d12c4c0 Rename module init functions from samba_init_module
Some modules use samba_init_module as the name for the init functions,
others use a name based on the module name.

Rename the init functions from samba_init_module, to be consistent
across all modules. This change also allows to build idmap_tdb2 and
perfcount_test statically.

Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Apr  2 08:50:04 CEST 2014 on sn-devel-104
2014-04-02 08:50:03 +02:00

616 lines
15 KiB
C

/*
Unix SMB/CIFS implementation.
idmap TDB2 backend, used for clustered Samba setups.
This uses dbwrap to access tdb files. The location can be set
using tdb:idmap2.tdb =" in smb.conf
Copyright (C) Andrew Tridgell 2007
This is heavily based upon idmap_tdb.c, which is:
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
Copyright (C) Michael Adam 2009-2010
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "system/filesys.h"
#include "winbindd.h"
#include "idmap.h"
#include "idmap_rw.h"
#include "dbwrap/dbwrap.h"
#include "dbwrap/dbwrap_open.h"
#include "../libcli/security/dom_sid.h"
#include "util_tdb.h"
#include "idmap_tdb_common.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_IDMAP
struct idmap_tdb2_context {
const char *script; /* script to provide idmaps */
};
/* High water mark keys */
#define HWM_GROUP "GROUP HWM"
#define HWM_USER "USER HWM"
/*
* check and initialize high/low water marks in the db
*/
static NTSTATUS idmap_tdb2_init_hwm(struct idmap_domain *dom)
{
NTSTATUS status;
uint32 low_id;
struct idmap_tdb_common_context *ctx;
ctx = talloc_get_type(dom->private_data,
struct idmap_tdb_common_context);
/* Create high water marks for group and user id */
status = dbwrap_fetch_uint32_bystring(ctx->db, HWM_USER, &low_id);
if (!NT_STATUS_IS_OK(status) || (low_id < dom->low_id)) {
status = dbwrap_trans_store_uint32_bystring(ctx->db, HWM_USER,
dom->low_id);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Unable to initialise user hwm in idmap "
"database: %s\n", nt_errstr(status)));
return NT_STATUS_INTERNAL_DB_ERROR;
}
}
status = dbwrap_fetch_uint32_bystring(ctx->db, HWM_GROUP, &low_id);
if (!NT_STATUS_IS_OK(status) || (low_id < dom->low_id)) {
status = dbwrap_trans_store_uint32_bystring(ctx->db, HWM_GROUP,
dom->low_id);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Unable to initialise group hwm in idmap "
"database: %s\n", nt_errstr(status)));
return NT_STATUS_INTERNAL_DB_ERROR;
}
}
return NT_STATUS_OK;
}
/*
open the permanent tdb
*/
static NTSTATUS idmap_tdb2_open_db(struct idmap_domain *dom)
{
char *db_path;
struct idmap_tdb_common_context *ctx;
ctx = talloc_get_type(dom->private_data,
struct idmap_tdb_common_context);
if (ctx->db) {
/* its already open */
return NT_STATUS_OK;
}
db_path = talloc_asprintf(NULL, "%s/idmap2.tdb", lp_private_dir());
NT_STATUS_HAVE_NO_MEMORY(db_path);
/* Open idmap repository */
ctx->db = db_open(ctx, db_path, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0644,
DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
TALLOC_FREE(db_path);
if (ctx->db == NULL) {
DEBUG(0, ("Unable to open idmap_tdb2 database '%s'\n",
db_path));
return NT_STATUS_UNSUCCESSFUL;
}
return idmap_tdb2_init_hwm(dom);
}
/**
* store a mapping in the database.
*/
struct idmap_tdb2_set_mapping_context {
const char *ksidstr;
const char *kidstr;
};
static NTSTATUS idmap_tdb2_set_mapping_action(struct db_context *db,
void *private_data)
{
TDB_DATA data;
NTSTATUS ret;
struct idmap_tdb2_set_mapping_context *state;
TALLOC_CTX *tmp_ctx = talloc_stackframe();
state = (struct idmap_tdb2_set_mapping_context *)private_data;
DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
/* check wheter sid mapping is already present in db */
ret = dbwrap_fetch_bystring(db, tmp_ctx, state->ksidstr, &data);
if (NT_STATUS_IS_OK(ret)) {
ret = NT_STATUS_OBJECT_NAME_COLLISION;
goto done;
}
ret = dbwrap_store_bystring(db, state->ksidstr,
string_term_tdb_data(state->kidstr),
TDB_INSERT);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
goto done;
}
ret = dbwrap_store_bystring(db, state->kidstr,
string_term_tdb_data(state->ksidstr),
TDB_INSERT);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
/* try to remove the previous stored SID -> ID map */
dbwrap_delete_bystring(db, state->ksidstr);
goto done;
}
DEBUG(10,("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
done:
talloc_free(tmp_ctx);
return ret;
}
static NTSTATUS idmap_tdb2_set_mapping(struct idmap_domain *dom, const struct id_map *map)
{
struct idmap_tdb2_context *ctx;
NTSTATUS ret;
char *ksidstr, *kidstr;
struct idmap_tdb_common_context *commonctx;
struct idmap_tdb2_set_mapping_context state;
if (!map || !map->sid) {
return NT_STATUS_INVALID_PARAMETER;
}
ksidstr = kidstr = NULL;
/* TODO: should we filter a set_mapping using low/high filters ? */
commonctx = talloc_get_type(dom->private_data,
struct idmap_tdb_common_context);
ctx = talloc_get_type(commonctx->private_data,
struct idmap_tdb2_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;
}
ksidstr = sid_string_talloc(ctx, map->sid);
if (ksidstr == NULL) {
DEBUG(0, ("Out of memory!\n"));
ret = NT_STATUS_NO_MEMORY;
goto done;
}
state.ksidstr = ksidstr;
state.kidstr = kidstr;
ret = dbwrap_trans_do(commonctx->db, idmap_tdb2_set_mapping_action,
&state);
done:
talloc_free(ksidstr);
talloc_free(kidstr);
return ret;
}
/*
run a script to perform a mapping
The script should the following command lines:
SIDTOID S-1-xxxx
IDTOSID UID xxxx
IDTOSID GID xxxx
and should return one of the following as a single line of text
UID:xxxx
GID:xxxx
SID:xxxx
ERR:xxxx
*/
static NTSTATUS idmap_tdb2_script(struct idmap_tdb2_context *ctx, struct id_map *map,
const char *fmt, ...)
{
va_list ap;
char *cmd;
FILE *p;
char line[64];
unsigned long v;
cmd = talloc_asprintf(ctx, "%s ", ctx->script);
NT_STATUS_HAVE_NO_MEMORY(cmd);
va_start(ap, fmt);
cmd = talloc_vasprintf_append(cmd, fmt, ap);
va_end(ap);
NT_STATUS_HAVE_NO_MEMORY(cmd);
p = popen(cmd, "r");
talloc_free(cmd);
if (p == NULL) {
return NT_STATUS_NONE_MAPPED;
}
if (fgets(line, sizeof(line)-1, p) == NULL) {
pclose(p);
return NT_STATUS_NONE_MAPPED;
}
pclose(p);
DEBUG(10,("idmap script gave: %s\n", line));
if (sscanf(line, "UID:%lu", &v) == 1) {
map->xid.id = v;
map->xid.type = ID_TYPE_UID;
} else if (sscanf(line, "GID:%lu", &v) == 1) {
map->xid.id = v;
map->xid.type = ID_TYPE_GID;
} else if (strncmp(line, "SID:S-", 6) == 0) {
if (!string_to_sid(map->sid, &line[4])) {
DEBUG(0,("Bad SID in '%s' from idmap script %s\n",
line, ctx->script));
return NT_STATUS_NONE_MAPPED;
}
} else {
DEBUG(0,("Bad reply '%s' from idmap script %s\n",
line, ctx->script));
return NT_STATUS_NONE_MAPPED;
}
return NT_STATUS_OK;
}
/*
Single id to sid lookup function.
*/
static NTSTATUS idmap_tdb2_id_to_sid(struct idmap_domain *dom, struct id_map *map)
{
NTSTATUS ret;
TDB_DATA data;
char *keystr;
NTSTATUS status;
struct idmap_tdb_common_context *commonctx;
struct idmap_tdb2_context *ctx;
if (!dom || !map) {
return NT_STATUS_INVALID_PARAMETER;
}
status = idmap_tdb2_open_db(dom);
NT_STATUS_NOT_OK_RETURN(status);
commonctx = talloc_get_type(dom->private_data,
struct idmap_tdb_common_context);
ctx = talloc_get_type(commonctx->private_data,
struct idmap_tdb2_context);
/* apply filters before checking */
if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
map->xid.id, dom->low_id, dom->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;
}
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 */
status = dbwrap_fetch_bystring(commonctx->db, keystr, keystr, &data);
if (!NT_STATUS_IS_OK(status)) {
char *sidstr;
struct idmap_tdb2_set_mapping_context store_state;
DEBUG(10,("Record %s not found\n", keystr));
if (ctx->script == NULL) {
ret = NT_STATUS_NONE_MAPPED;
goto done;
}
ret = idmap_tdb2_script(ctx, map, "IDTOSID %s", keystr);
if (!NT_STATUS_IS_OK(ret)) {
goto done;
}
sidstr = sid_string_talloc(keystr, map->sid);
if (!sidstr) {
ret = NT_STATUS_NO_MEMORY;
goto done;
}
store_state.ksidstr = sidstr;
store_state.kidstr = keystr;
ret = dbwrap_trans_do(commonctx->db,
idmap_tdb2_set_mapping_action,
&store_state);
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:
talloc_free(keystr);
return ret;
}
/*
Single sid to id lookup function.
*/
static NTSTATUS idmap_tdb2_sid_to_id(struct idmap_domain *dom, struct id_map *map)
{
NTSTATUS ret;
TDB_DATA data;
char *keystr;
unsigned long rec_id = 0;
struct idmap_tdb_common_context *commonctx;
struct idmap_tdb2_context *ctx;
TALLOC_CTX *tmp_ctx = talloc_stackframe();
ret = idmap_tdb2_open_db(dom);
NT_STATUS_NOT_OK_RETURN(ret);
commonctx = talloc_get_type(dom->private_data,
struct idmap_tdb_common_context);
ctx = talloc_get_type(commonctx->private_data,
struct idmap_tdb2_context);
keystr = sid_string_talloc(tmp_ctx, map->sid);
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 sid is present in database */
ret = dbwrap_fetch_bystring(commonctx->db, tmp_ctx, keystr, &data);
if (!NT_STATUS_IS_OK(ret)) {
char *idstr;
struct idmap_tdb2_set_mapping_context store_state;
DEBUG(10,(__location__ " Record %s not found\n", keystr));
if (ctx->script == NULL) {
ret = NT_STATUS_NONE_MAPPED;
goto done;
}
ret = idmap_tdb2_script(ctx, map, "SIDTOID %s", keystr);
if (!NT_STATUS_IS_OK(ret)) {
goto done;
}
/* apply filters before returning result */
if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
DEBUG(5, ("Script returned id (%u) out of range "
"(%u - %u). Filtered!\n",
map->xid.id, dom->low_id, dom->high_id));
ret = NT_STATUS_NONE_MAPPED;
goto done;
}
idstr = talloc_asprintf(tmp_ctx, "%cID %lu",
map->xid.type == ID_TYPE_UID?'U':'G',
(unsigned long)map->xid.id);
if (idstr == NULL) {
ret = NT_STATUS_NO_MEMORY;
goto done;
}
store_state.ksidstr = keystr;
store_state.kidstr = idstr;
ret = dbwrap_trans_do(commonctx->db,
idmap_tdb2_set_mapping_action,
&store_state);
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;
goto done;
}
/* apply filters before returning result */
if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
map->xid.id, dom->low_id, dom->high_id));
ret = NT_STATUS_NONE_MAPPED;
}
done:
talloc_free(tmp_ctx);
return ret;
}
/*
Initialise idmap database.
*/
static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom)
{
NTSTATUS ret;
struct idmap_tdb_common_context *commonctx;
struct idmap_tdb2_context *ctx;
char *config_option = NULL;
const char * idmap_script = NULL;
commonctx = talloc_zero(dom, struct idmap_tdb_common_context);
if(!commonctx) {
DEBUG(0, ("Out of memory!\n"));
return NT_STATUS_NO_MEMORY;
}
commonctx->rw_ops = talloc_zero(commonctx, struct idmap_rw_ops);
if (commonctx->rw_ops == NULL) {
DEBUG(0, ("Out of memory!\n"));
ret = NT_STATUS_NO_MEMORY;
goto failed;
}
ctx = talloc_zero(commonctx, struct idmap_tdb2_context);
if (!ctx) {
DEBUG(0, ("Out of memory!\n"));
ret = NT_STATUS_NO_MEMORY;
goto failed;
}
config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
if (config_option == NULL) {
DEBUG(0, ("Out of memory!\n"));
ret = NT_STATUS_NO_MEMORY;
goto failed;
}
ctx->script = lp_parm_const_string(-1, config_option, "script", NULL);
talloc_free(config_option);
idmap_script = lp_parm_const_string(-1, "idmap", "script", NULL);
if (idmap_script != NULL) {
DEBUG(0, ("Warning: 'idmap:script' is deprecated. "
" Please use 'idmap config * : script' instead!\n"));
}
if (strequal(dom->name, "*") && ctx->script == NULL) {
/* fall back to idmap:script for backwards compatibility */
ctx->script = idmap_script;
}
if (ctx->script) {
DEBUG(1, ("using idmap script '%s'\n", ctx->script));
}
commonctx->max_id = dom->high_id;
commonctx->hwmkey_uid = HWM_USER;
commonctx->hwmkey_gid = HWM_GROUP;
commonctx->sid_to_unixid_fn = idmap_tdb2_sid_to_id;
commonctx->unixid_to_sid_fn = idmap_tdb2_id_to_sid;
commonctx->rw_ops->get_new_id = idmap_tdb_common_get_new_id;
commonctx->rw_ops->set_mapping = idmap_tdb2_set_mapping;
commonctx->private_data = ctx;
dom->private_data = commonctx;
ret = idmap_tdb2_open_db(dom);
if (!NT_STATUS_IS_OK(ret)) {
goto failed;
}
return NT_STATUS_OK;
failed:
talloc_free(commonctx);
return ret;
}
static struct idmap_methods db_methods = {
.init = idmap_tdb2_db_init,
.unixids_to_sids = idmap_tdb_common_unixids_to_sids,
.sids_to_unixids = idmap_tdb_common_sids_to_unixids,
.allocate_id = idmap_tdb_common_get_new_id
};
NTSTATUS idmap_tdb2_init(void)
{
return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
}