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|
/*
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
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 "winbindd.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_IDMAP
struct idmap_tdb2_context {
uint32_t filter_low_id;
uint32_t filter_high_id;
const char *script; /* script to provide idmaps */
};
/* High water mark keys */
#define HWM_GROUP "GROUP HWM"
#define HWM_USER "USER HWM"
static struct idmap_tdb2_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_tdb2_state;
static NTSTATUS idmap_tdb2_new_mapping(struct idmap_domain *dom,
struct id_map *map);
/* handle to the permanent tdb */
static struct db_context *idmap_tdb2;
static NTSTATUS idmap_tdb2_alloc_load(void);
static NTSTATUS idmap_tdb2_load_ranges(void)
{
uid_t low_uid = 0;
uid_t high_uid = 0;
gid_t low_gid = 0;
gid_t high_gid = 0;
if (!lp_idmap_uid(&low_uid, &high_uid)) {
DEBUG(1, ("idmap uid missing\n"));
return NT_STATUS_UNSUCCESSFUL;
}
if (!lp_idmap_gid(&low_gid, &high_gid)) {
DEBUG(1, ("idmap gid missing\n"));
return NT_STATUS_UNSUCCESSFUL;
}
idmap_tdb2_state.low_uid = low_uid;
idmap_tdb2_state.high_uid = high_uid;
idmap_tdb2_state.low_gid = low_gid;
idmap_tdb2_state.high_gid = high_gid;
if (idmap_tdb2_state.high_uid <= idmap_tdb2_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;
}
if (idmap_tdb2_state.high_gid <= idmap_tdb2_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;
}
return NT_STATUS_OK;
}
/*
open the permanent tdb
*/
static NTSTATUS idmap_tdb2_open_db(void)
{
char *db_path;
if (idmap_tdb2) {
/* its already open */
return NT_STATUS_OK;
}
db_path = lp_parm_talloc_string(-1, "tdb", "idmap2.tdb", NULL);
if (db_path == NULL) {
/* fall back to the private directory, which, despite
its name, is usually on shared storage */
db_path = talloc_asprintf(NULL, "%s/idmap2.tdb", lp_private_dir());
}
NT_STATUS_HAVE_NO_MEMORY(db_path);
/* Open idmap repository */
idmap_tdb2 = db_open(NULL, db_path, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0644);
TALLOC_FREE(db_path);
if (idmap_tdb2 == NULL) {
DEBUG(0, ("Unable to open idmap_tdb2 database '%s'\n",
db_path));
return NT_STATUS_UNSUCCESSFUL;
}
/* load the ranges and high/low water marks */
return idmap_tdb2_alloc_load();
}
/*
load the idmap allocation ranges and high/low water marks
*/
static NTSTATUS idmap_tdb2_alloc_load(void)
{
NTSTATUS status;
uint32 low_id;
/* load ranges */
status = idmap_tdb2_load_ranges();
if (!NT_STATUS_IS_OK(status)) {
return status;
}
/* Create high water marks for group and user id */
low_id = dbwrap_fetch_int32(idmap_tdb2, HWM_USER);
if ((low_id == -1) || (low_id < idmap_tdb2_state.low_uid)) {
if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
idmap_tdb2, HWM_USER,
idmap_tdb2_state.low_uid))) {
DEBUG(0, ("Unable to initialise user hwm in idmap "
"database\n"));
return NT_STATUS_INTERNAL_DB_ERROR;
}
}
low_id = dbwrap_fetch_int32(idmap_tdb2, HWM_GROUP);
if ((low_id == -1) || (low_id < idmap_tdb2_state.low_gid)) {
if (!NT_STATUS_IS_OK(dbwrap_trans_store_int32(
idmap_tdb2, HWM_GROUP,
idmap_tdb2_state.low_gid))) {
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.
*/
struct idmap_tdb2_allocate_id_context {
const char *hwmkey;
const char *hwmtype;
uint32_t high_hwm;
uint32_t hwm;
};
static NTSTATUS idmap_tdb2_allocate_id_action(struct db_context *db,
void *private_data)
{
NTSTATUS ret;
struct idmap_tdb2_allocate_id_context *state;
uint32_t hwm;
state = (struct idmap_tdb2_allocate_id_context *)private_data;
hwm = dbwrap_fetch_int32(db, state->hwmkey);
if (hwm == -1) {
ret = NT_STATUS_INTERNAL_DB_ERROR;
goto done;
}
/* check it is in the range */
if (hwm > state->high_hwm) {
DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
state->hwmtype, (unsigned long)state->high_hwm));
ret = NT_STATUS_UNSUCCESSFUL;
goto done;
}
/* fetch a new id and increment it */
ret = dbwrap_trans_change_uint32_atomic(db, state->hwmkey, &hwm, 1);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(1, ("Fatal error while fetching a new %s value\n!",
state->hwmtype));
goto done;
}
/* recheck it is in the range */
if (hwm > state->high_hwm) {
DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
state->hwmtype, (unsigned long)state->high_hwm));
ret = NT_STATUS_UNSUCCESSFUL;
goto done;
}
ret = NT_STATUS_OK;
state->hwm = hwm;
done:
return ret;
}
static NTSTATUS idmap_tdb2_allocate_id(struct idmap_domain *dom,
struct unixid *xid)
{
const char *hwmkey;
const char *hwmtype;
uint32_t high_hwm;
uint32_t hwm = 0;
NTSTATUS status;
struct idmap_tdb2_context *ctx;
struct idmap_tdb2_allocate_id_context state;
status = idmap_tdb2_open_db();
NT_STATUS_NOT_OK_RETURN(status);
ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
/* Get current high water mark */
switch (xid->type) {
case ID_TYPE_UID:
hwmkey = HWM_USER;
hwmtype = "UID";
break;
case ID_TYPE_GID:
hwmkey = HWM_GROUP;
hwmtype = "GID";
break;
default:
DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
return NT_STATUS_INVALID_PARAMETER;
}
high_hwm = ctx->filter_high_id;
state.hwm = hwm;
state.high_hwm = high_hwm;
state.hwmtype = hwmtype;
state.hwmkey = hwmkey;
status = dbwrap_trans_do(idmap_tdb2, idmap_tdb2_allocate_id_action,
&state);
if (NT_STATUS_IS_OK(status)) {
xid->id = state.hwm;
DEBUG(10,("New %s = %d\n", hwmtype, state.hwm));
} else {
DEBUG(1, ("Error allocating a new %s\n", hwmtype));
}
return status;
}
/**
* Allocate a new unix-ID.
* For now this is for the default idmap domain only.
* Should be extended later on.
*/
static NTSTATUS idmap_tdb2_get_new_id(struct idmap_domain *dom,
struct unixid *id)
{
NTSTATUS ret;
if (!strequal(dom->name, "*")) {
DEBUG(3, ("idmap_tdb2_get_new_id: "
"Refusing creation of mapping for domain'%s'. "
"Currently only supported for the default "
"domain \"*\".\n",
dom->name));
return NT_STATUS_NOT_IMPLEMENTED;
}
ret = idmap_tdb2_allocate_id(dom, id);
return ret;
}
/*
IDMAP MAPPING TDB BACKEND
*/
/*
Initialise idmap database.
*/
static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom,
const char *params)
{
NTSTATUS ret;
struct idmap_tdb2_context *ctx;
NTSTATUS status;
ctx = talloc(dom, struct idmap_tdb2_context);
if ( ! ctx) {
DEBUG(0, ("Out of memory!\n"));
return NT_STATUS_NO_MEMORY;
}
if (strequal(dom->name, "*")) {
uid_t low_uid = 0;
uid_t high_uid = 0;
gid_t low_gid = 0;
gid_t high_gid = 0;
ctx->filter_low_id = 0;
ctx->filter_high_id = 0;
if (lp_idmap_uid(&low_uid, &high_uid)) {
ctx->filter_low_id = low_uid;
ctx->filter_high_id = high_uid;
} else {
DEBUG(3, ("Warning: 'idmap uid' not set!\n"));
}
if (lp_idmap_gid(&low_gid, &high_gid)) {
if ((low_gid != low_uid) || (high_gid != high_uid)) {
DEBUG(1, ("Warning: 'idmap uid' and 'idmap gid'"
" ranges do not agree -- building "
"intersection\n"));
ctx->filter_low_id = MAX(ctx->filter_low_id,
low_gid);
ctx->filter_high_id = MIN(ctx->filter_high_id,
high_gid);
}
} else {
DEBUG(3, ("Warning: 'idmap gid' not set!\n"));
}
ctx->script = lp_parm_const_string(-1, "idmap", "script", NULL);
if (ctx->script) {
DEBUG(1, ("using idmap script '%s'\n", ctx->script));
}
} else {
char *config_option = NULL;
const char *range;
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;
}
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 = 0;
ctx->filter_high_id = 0;
}
talloc_free(config_option);
}
if (ctx->filter_low_id > ctx->filter_high_id) {
ctx->filter_low_id = 0;
ctx->filter_high_id = 0;
}
ret = idmap_tdb2_open_db();
if (!NT_STATUS_IS_OK(ret)) {
goto failed;
}
dom->private_data = ctx;
return NT_STATUS_OK;
failed:
talloc_free(ctx);
return ret;
}
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 */
data = dbwrap_fetch_bystring(db, tmp_ctx, state->ksidstr);
if (data.dptr) {
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;
}
/*
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_tdb2_context *ctx, struct id_map *map)
{
NTSTATUS ret;
TDB_DATA data;
char *keystr;
NTSTATUS status;
status = idmap_tdb2_open_db();
NT_STATUS_NOT_OK_RETURN(status);
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 = dbwrap_fetch_bystring(idmap_tdb2, keystr, keystr);
if (!data.dptr) {
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);
/* store it on shared storage */
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(idmap_tdb2, 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_tdb2_context *ctx, struct id_map *map)
{
NTSTATUS ret;
TDB_DATA data;
char *keystr;
unsigned long rec_id = 0;
TALLOC_CTX *tmp_ctx = talloc_stackframe();
ret = idmap_tdb2_open_db();
NT_STATUS_NOT_OK_RETURN(ret);
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 */
data = dbwrap_fetch_bystring(idmap_tdb2, tmp_ctx, keystr);
if (!data.dptr) {
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);
/* store it on shared storage */
if (!NT_STATUS_IS_OK(ret)) {
goto done;
}
/* 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, ("Script returned 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;
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(idmap_tdb2, 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 ((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(tmp_ctx);
return ret;
}
/*
lookup a set of unix ids.
*/
static NTSTATUS idmap_tdb2_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
{
struct idmap_tdb2_context *ctx;
NTSTATUS ret;
int i;
/* initialize the status to avoid suprise */
for (i = 0; ids[i]; i++) {
ids[i]->status = ID_UNKNOWN;
}
ctx = talloc_get_type(dom->private_data, struct idmap_tdb2_context);
for (i = 0; ids[i]; i++) {
ret = idmap_tdb2_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.
*/
struct idmap_tdb2_sids_to_unixids_context {
struct idmap_domain *dom;
struct id_map **ids;
bool allocate_unmapped;
};
static NTSTATUS idmap_tdb2_sids_to_unixids_action(struct db_context *db,
void *private_data)
{
struct idmap_tdb2_sids_to_unixids_context *state;
int i;
struct idmap_tdb2_context *ctx;
NTSTATUS ret = NT_STATUS_OK;
state = (struct idmap_tdb2_sids_to_unixids_context *)private_data;
DEBUG(10, ("idmap_tdb2_sids_to_unixids_action: "
" domain: [%s], allocate: %s\n",
state->dom->name,
state->allocate_unmapped ? "yes" : "no"));
ctx = talloc_get_type(state->dom->private_data,
struct idmap_tdb2_context);
for (i = 0; state->ids[i]; i++) {
if ((state->ids[i]->status == ID_UNKNOWN) ||
/* retry if we could not map in previous run: */
(state->ids[i]->status == ID_UNMAPPED))
{
NTSTATUS ret2;
ret2 = idmap_tdb2_sid_to_id(ctx, state->ids[i]);
if (!NT_STATUS_IS_OK(ret2)) {
/* if it is just a failed mapping, continue */
if (NT_STATUS_EQUAL(ret2, NT_STATUS_NONE_MAPPED)) {
/* make sure it is marked as unmapped */
state->ids[i]->status = ID_UNMAPPED;
ret = STATUS_SOME_UNMAPPED;
} else {
/* some fatal error occurred, return immediately */
ret = ret2;
goto done;
}
} else {
/* all ok, id is mapped */
state->ids[i]->status = ID_MAPPED;
}
}
if ((state->ids[i]->status == ID_UNMAPPED) &&
state->allocate_unmapped)
{
ret = idmap_tdb2_new_mapping(state->dom, state->ids[i]);
if (!NT_STATUS_IS_OK(ret)) {
goto done;
}
}
}
done:
return ret;
}
static NTSTATUS idmap_tdb2_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
{
NTSTATUS ret;
int i;
struct idmap_tdb2_sids_to_unixids_context state;
/* initialize the status to avoid suprise */
for (i = 0; ids[i]; i++) {
ids[i]->status = ID_UNKNOWN;
}
state.dom = dom;
state.ids = ids;
state.allocate_unmapped = false;
ret = idmap_tdb2_sids_to_unixids_action(idmap_tdb2, &state);
if (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED)) {
state.allocate_unmapped = true;
ret = dbwrap_trans_do(idmap_tdb2,
idmap_tdb2_sids_to_unixids_action,
&state);
}
return ret;
}
/*
set a mapping.
*/
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_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 ? */
ctx = talloc_get_type(dom->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(idmap_tdb2, idmap_tdb2_set_mapping_action,
&state);
done:
talloc_free(ksidstr);
talloc_free(kidstr);
return ret;
}
/**
* Create a new mapping for an unmapped SID, also allocating a new ID.
* This should be run inside a transaction.
*
* TODO:
* Properly integrate this with multi domain idmap config:
* Currently, the allocator is default-config only.
*/
static NTSTATUS idmap_tdb2_new_mapping(struct idmap_domain *dom, struct id_map *map)
{
NTSTATUS ret;
char *sidstr;
TDB_DATA data;
TALLOC_CTX *mem_ctx = talloc_stackframe();
if (map == NULL) {
ret = NT_STATUS_INVALID_PARAMETER;
goto done;
}
if ((map->xid.type != ID_TYPE_UID) && (map->xid.type != ID_TYPE_GID)) {
ret = NT_STATUS_INVALID_PARAMETER;
goto done;
}
if (map->sid == NULL) {
ret = NT_STATUS_INVALID_PARAMETER;
goto done;
}
/* check wheter the SID is already mapped in the db */
sidstr = sid_string_talloc(mem_ctx, map->sid);
if (sidstr == NULL) {
DEBUG(0, ("Out of memory!\n"));
ret = NT_STATUS_NO_MEMORY;
goto done;
}
data = dbwrap_fetch_bystring(idmap_tdb2, mem_ctx, sidstr);
if (data.dptr) {
ret = NT_STATUS_OBJECT_NAME_COLLISION;
goto done;
}
/* unmapped - get a new id */
ret = idmap_tdb2_get_new_id(dom, &map->xid);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(3, ("Could not allocate id: %s\n", nt_errstr(ret)));
goto done;
}
DEBUG(10, ("Setting mapping: %s <-> %s %lu\n",
sid_string_dbg(map->sid),
(map->xid.type == ID_TYPE_UID) ? "UID" : "GID",
(unsigned long)map->xid.id));
map->status = ID_MAPPED;
/* store the mapping */
ret = idmap_tdb2_set_mapping(dom, map);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(3, ("Could not store the new mapping: %s\n",
nt_errstr(ret)));
}
done:
talloc_free(mem_ctx);
return ret;
}
/*
Close the idmap tdb instance
*/
static NTSTATUS idmap_tdb2_close(struct idmap_domain *dom)
{
/* don't do anything */
return NT_STATUS_OK;
}
static struct idmap_methods db_methods = {
.init = idmap_tdb2_db_init,
.unixids_to_sids = idmap_tdb2_unixids_to_sids,
.sids_to_unixids = idmap_tdb2_sids_to_unixids,
.allocate_id = idmap_tdb2_get_new_id,
.close_fn = idmap_tdb2_close
};
NTSTATUS idmap_tdb2_init(void)
{
return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "tdb2", &db_methods);
}
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