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-rw-r--r--source3/nsswitch/winbindd_idmap_tdb.c459
1 files changed, 459 insertions, 0 deletions
diff --git a/source3/nsswitch/winbindd_idmap_tdb.c b/source3/nsswitch/winbindd_idmap_tdb.c
new file mode 100644
index 0000000000..12d6972bae
--- /dev/null
+++ b/source3/nsswitch/winbindd_idmap_tdb.c
@@ -0,0 +1,459 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Winbind daemon - user related function
+
+ Copyright (C) Tim Potter 2000
+ Copyright (C) Anthony Liguori 2003
+
+ 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 "winbindd.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_WINBIND
+
+/* High water mark keys */
+#define HWM_GROUP "GROUP HWM"
+#define HWM_USER "USER HWM"
+
+/* idmap version determines auto-conversion */
+#define IDMAP_VERSION 2
+
+/* Globals */
+static TDB_CONTEXT *idmap_tdb;
+
+/* convert one record to the new format */
+static int tdb_convert_fn(TDB_CONTEXT * tdb, TDB_DATA key, TDB_DATA data,
+ void *ignored)
+{
+ struct winbindd_domain *domain;
+ char *p;
+ DOM_SID sid;
+ uint32 rid;
+ fstring keystr;
+ fstring dom_name;
+ TDB_DATA key2;
+
+ p = strchr(key.dptr, '/');
+ if (!p)
+ return 0;
+
+ *p = 0;
+ fstrcpy(dom_name, key.dptr);
+ *p++ = '/';
+
+ domain = find_domain_from_name(dom_name);
+ if (!domain) {
+ /* We must delete the old record. */
+ DEBUG(0,
+ ("winbindd: tdb_convert_fn : Unable to find domain %s\n",
+ dom_name));
+ DEBUG(0,
+ ("winbindd: tdb_convert_fn : deleting record %s\n",
+ key.dptr));
+ tdb_delete(idmap_tdb, key);
+ return 0;
+ }
+
+ rid = atoi(p);
+
+ sid_copy(&sid, &domain->sid);
+ sid_append_rid(&sid, rid);
+
+ sid_to_string(keystr, &sid);
+ key2.dptr = keystr;
+ key2.dsize = strlen(keystr) + 1;
+
+ if (tdb_store(idmap_tdb, key2, data, TDB_INSERT) != 0) {
+ /* not good! */
+ DEBUG(0,
+ ("winbindd: tdb_convert_fn : Unable to update record %s\n",
+ key2.dptr));
+ DEBUG(0,
+ ("winbindd: tdb_convert_fn : conversion failed - idmap corrupt ?\n"));
+ return -1;
+ }
+
+ if (tdb_store(idmap_tdb, data, key2, TDB_REPLACE) != 0) {
+ /* not good! */
+ DEBUG(0,
+ ("winbindd: tdb_convert_fn : Unable to update record %s\n",
+ data.dptr));
+ DEBUG(0,
+ ("winbindd: tdb_convert_fn : conversion failed - idmap corrupt ?\n"));
+ return -1;
+ }
+
+ tdb_delete(idmap_tdb, key);
+
+ return 0;
+}
+
+/*****************************************************************************
+ Convert the idmap database from an older version.
+*****************************************************************************/
+static BOOL tdb_idmap_convert(void)
+{
+ int32 vers = tdb_fetch_int32(idmap_tdb, "IDMAP_VERSION");
+ BOOL bigendianheader =
+ (idmap_tdb->flags & TDB_BIGENDIAN) ? True : False;
+
+ if (vers == IDMAP_VERSION)
+ return True;
+
+ 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 = server_state.uid_low;
+
+ if (tdb_store_int32(idmap_tdb, HWM_USER, wm) == -1) {
+ DEBUG(0,
+ ("tdb_idmap_convert: Unable to byteswap user hwm in idmap database\n"));
+ return False;
+ }
+
+ wm = tdb_fetch_int32(idmap_tdb, HWM_GROUP);
+ if (wm != -1) {
+ wm = IREV(wm);
+ } else
+ wm = server_state.gid_low;
+
+ if (tdb_store_int32(idmap_tdb, HWM_GROUP, wm) == -1) {
+ DEBUG(0,
+ ("tdb_idmap_convert: Unable to byteswap group hwm in idmap database\n"));
+ return False;
+ }
+ }
+
+ /* the old format stored as DOMAIN/rid - now we store the SID direct */
+ tdb_traverse(idmap_tdb, tdb_convert_fn, NULL);
+
+ if (tdb_store_int32(idmap_tdb, "IDMAP_VERSION", IDMAP_VERSION) ==
+ -1) {
+ DEBUG(0,
+ ("tdb_idmap_convert: Unable to byteswap group hwm in idmap database\n"));
+ return False;
+ }
+
+ return True;
+}
+
+/* Allocate either a user or group id from the pool */
+static BOOL tdb_allocate_id(uid_t * id, BOOL isgroup)
+{
+ int hwm;
+
+ /* Get current high water mark */
+ if ((hwm = tdb_fetch_int32(idmap_tdb,
+ isgroup ? HWM_GROUP : HWM_USER)) ==
+ -1) {
+ return False;
+ }
+
+ /* Return next available uid in list */
+ if ((isgroup && (hwm > server_state.gid_high)) ||
+ (!isgroup && (hwm > server_state.uid_high))) {
+ DEBUG(0,
+ ("winbind %sid range full!\n", isgroup ? "g" : "u"));
+ return False;
+ }
+
+ if (id) {
+ *id = hwm;
+ }
+
+ hwm++;
+
+ /* Store new high water mark */
+ tdb_store_int32(idmap_tdb, isgroup ? HWM_GROUP : HWM_USER, hwm);
+
+ return True;
+}
+
+/* Get a sid from an id */
+static BOOL tdb_get_sid_from_id(int id, DOM_SID * sid, BOOL isgroup)
+{
+ TDB_DATA key, data;
+ fstring keystr;
+ BOOL result = False;
+
+ slprintf(keystr, sizeof(keystr), "%s %d", isgroup ? "GID" : "UID",
+ id);
+
+ key.dptr = keystr;
+ key.dsize = strlen(keystr) + 1;
+
+ data = tdb_fetch(idmap_tdb, key);
+
+ if (data.dptr) {
+ result = string_to_sid(sid, data.dptr);
+ SAFE_FREE(data.dptr);
+ }
+
+ return result;
+}
+
+/* Get an id from a sid */
+static BOOL tdb_get_id_from_sid(DOM_SID * sid, uid_t * id, BOOL isgroup)
+{
+ TDB_DATA data, key;
+ fstring keystr;
+ BOOL result = False;
+
+ /* Check if sid is present in database */
+ sid_to_string(keystr, sid);
+
+ key.dptr = keystr;
+ key.dsize = strlen(keystr) + 1;
+
+ data = tdb_fetch(idmap_tdb, key);
+
+ if (data.dptr) {
+ fstring scanstr;
+ int the_id;
+
+ /* Parse and return existing uid */
+ fstrcpy(scanstr, isgroup ? "GID" : "UID");
+ fstrcat(scanstr, " %d");
+
+ if (sscanf(data.dptr, scanstr, &the_id) == 1) {
+ /* Store uid */
+ if (id) {
+ *id = the_id;
+ }
+
+ result = True;
+ }
+
+ SAFE_FREE(data.dptr);
+ } else {
+
+ /* Allocate a new id for this sid */
+ if (id && tdb_allocate_id(id, isgroup)) {
+ fstring keystr2;
+
+ /* Store new id */
+ slprintf(keystr2, sizeof(keystr2), "%s %d",
+ isgroup ? "GID" : "UID", *id);
+
+ data.dptr = keystr2;
+ data.dsize = strlen(keystr2) + 1;
+
+ tdb_store(idmap_tdb, key, data, TDB_REPLACE);
+ tdb_store(idmap_tdb, data, key, TDB_REPLACE);
+
+ result = True;
+ }
+ }
+
+ return result;
+}
+
+/*****************************************************************************
+ Initialise idmap database.
+*****************************************************************************/
+static BOOL tdb_idmap_init(void)
+{
+ SMB_STRUCT_STAT stbuf;
+
+ /* move to the new database on first startup */
+ if (!file_exist(lock_path("idmap.tdb"), &stbuf)) {
+ if (file_exist(lock_path("winbindd_idmap.tdb"), &stbuf)) {
+ char *cmd = NULL;
+
+ /* lazy file copy */
+ if (asprintf(&cmd, "cp -p %s/winbindd_idmap.tdb %s/idmap.tdb", lp_lockdir(), lp_lockdir()) != -1) {
+ system(cmd);
+ free(cmd);
+ }
+ if (!file_exist(lock_path("idmap.tdb"), &stbuf)) {
+ DEBUG(0, ("idmap_init: Unable to make a new database copy\n"));
+ return False;
+ }
+ }
+ }
+
+ /* Open tdb cache */
+ if (!(idmap_tdb = tdb_open_log(lock_path("idmap.tdb"), 0,
+ TDB_DEFAULT, O_RDWR | O_CREAT,
+ 0600))) {
+ DEBUG(0,
+ ("winbindd_idmap_init: Unable to open idmap database\n"));
+ return False;
+ }
+
+ /* possibly convert from an earlier version */
+ if (!tdb_idmap_convert()) {
+ DEBUG(0, ("winbindd_idmap_init: Unable to open idmap database\n"));
+ return False;
+ }
+
+ /* Create high water marks for group and user id */
+ if (tdb_fetch_int32(idmap_tdb, HWM_USER) == -1) {
+ if (tdb_store_int32
+ (idmap_tdb, HWM_USER, server_state.uid_low) == -1) {
+ DEBUG(0,
+ ("winbindd_idmap_init: Unable to initialise user hwm in idmap database\n"));
+ return False;
+ }
+ }
+
+ if (tdb_fetch_int32(idmap_tdb, HWM_GROUP) == -1) {
+ if (tdb_store_int32
+ (idmap_tdb, HWM_GROUP, server_state.gid_low) == -1) {
+ DEBUG(0,
+ ("winbindd_idmap_init: Unable to initialise group hwm in idmap database\n"));
+ return False;
+ }
+ }
+
+ return True;
+}
+
+/* Get a sid from a uid */
+static BOOL tdb_get_sid_from_uid(uid_t uid, DOM_SID * sid)
+{
+ return tdb_get_sid_from_id((int) uid, sid, False);
+}
+
+/* Get a sid from a gid */
+static BOOL tdb_get_sid_from_gid(gid_t gid, DOM_SID * sid)
+{
+ return tdb_get_sid_from_id((int) gid, sid, True);
+}
+
+/* Get a uid from a sid */
+static BOOL tdb_get_uid_from_sid(DOM_SID * sid, uid_t * uid)
+{
+ return tdb_get_id_from_sid(sid, uid, False);
+}
+
+/* Get a gid from a group sid */
+static BOOL tdb_get_gid_from_sid(DOM_SID * sid, gid_t * gid)
+{
+ return tdb_get_id_from_sid(sid, gid, True);
+}
+
+/* Close the tdb */
+static BOOL tdb_idmap_close(void)
+{
+ if (idmap_tdb)
+ return (tdb_close(idmap_tdb) == 0);
+ return True;
+}
+
+
+/* Dump status information to log file. Display different stuff based on
+ the debug level:
+
+ Debug Level Information Displayed
+ =================================================================
+ 0 Percentage of [ug]id range allocated
+ 0 High water marks (next allocated ids)
+*/
+
+#define DUMP_INFO 0
+
+static void tdb_idmap_status(void)
+{
+ int user_hwm, group_hwm;
+
+ DEBUG(0, ("winbindd idmap status:\n"));
+
+ /* Get current high water marks */
+
+ if ((user_hwm = tdb_fetch_int32(idmap_tdb, HWM_USER)) == -1) {
+ DEBUG(DUMP_INFO,
+ ("\tCould not get userid high water mark!\n"));
+ }
+
+ if ((group_hwm = tdb_fetch_int32(idmap_tdb, HWM_GROUP)) == -1) {
+ DEBUG(DUMP_INFO,
+ ("\tCould not get groupid high water mark!\n"));
+ }
+
+ /* Display next ids to allocate */
+
+ if (user_hwm != -1) {
+ DEBUG(DUMP_INFO,
+ ("\tNext userid to allocate is %d\n", user_hwm));
+ }
+
+ if (group_hwm != -1) {
+ DEBUG(DUMP_INFO,
+ ("\tNext groupid to allocate is %d\n", group_hwm));
+ }
+
+ /* Display percentage of id range already allocated. */
+
+ if (user_hwm != -1) {
+ int num_users = user_hwm - server_state.uid_low;
+ int total_users =
+ server_state.uid_high - server_state.uid_low;
+
+ DEBUG(DUMP_INFO,
+ ("\tUser id range is %d%% full (%d of %d)\n",
+ num_users * 100 / total_users, num_users,
+ total_users));
+ }
+
+ if (group_hwm != -1) {
+ int num_groups = group_hwm - server_state.gid_low;
+ int total_groups =
+ server_state.gid_high - server_state.gid_low;
+
+ DEBUG(DUMP_INFO,
+ ("\tGroup id range is %d%% full (%d of %d)\n",
+ num_groups * 100 / total_groups, num_groups,
+ total_groups));
+ }
+
+ /* Display complete mapping of users and groups to rids */
+}
+
+struct winbindd_idmap_methods tdb_idmap_methods = {
+ tdb_idmap_init,
+
+ tdb_get_sid_from_uid,
+ tdb_get_sid_from_gid,
+
+ tdb_get_uid_from_sid,
+ tdb_get_gid_from_sid,
+
+ tdb_idmap_close,
+
+ tdb_idmap_status
+};
+
+BOOL winbind_idmap_reg_tdb(struct winbindd_idmap_methods **meth)
+{
+ *meth = &tdb_idmap_methods;
+
+ return True;
+}
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