r23367: check the "use mmap" option for ldb too
[sfrench/samba-autobuild/.git] / source / groupdb / mapping.c
index 93e7169204a718d992689ed6c363adccf7f85a6c..9ead1c631780b2e792aa80c5bf18f22e8e1c33f4 100644 (file)
@@ -3,6 +3,8 @@
  *  RPC Pipe client / server routines
  *  Copyright (C) Andrew Tridgell              1992-2000,
  *  Copyright (C) Jean François Micouleau      1998-2001.
+ *  Copyright (C) Volker Lendecke              2006.
+ *  Copyright (C) Gerald Carter                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
  */
 
 #include "includes.h"
+#include "groupdb/mapping.h"
 
-static TDB_CONTEXT *tdb; /* used for driver files */
+static const struct mapping_backend *backend;
 
-#define DATABASE_VERSION_V1 1 /* native byte format. */
-#define DATABASE_VERSION_V2 2 /* le format. */
-
-#define GROUP_PREFIX "UNIXGROUP/"
-
-/* Alias memberships are stored reverse, as memberships. The performance
- * critical operation is to determine the aliases a SID is member of, not
- * listing alias members. So we store a list of alias SIDs a SID is member of
- * hanging of the member as key.
+/*
+  initialise a group mapping backend
  */
-#define MEMBEROF_PREFIX "MEMBEROF/"
-
-/****************************************************************************
-initialise first time the mapping list - called from init_group_mapping()
-****************************************************************************/
-static BOOL default_group_mapping(void)
-{
-       DOM_SID sid_admins;
-       DOM_SID sid_users;
-       DOM_SID sid_guests;
-       fstring str_admins;
-       fstring str_users;
-       fstring str_guests;
-
-       /* Add the Wellknown groups */
-
-       add_initial_entry(-1, "S-1-5-32-544", SID_NAME_WKN_GRP, "Administrators", "");
-       add_initial_entry(-1, "S-1-5-32-545", SID_NAME_WKN_GRP, "Users", "");
-       add_initial_entry(-1, "S-1-5-32-546", SID_NAME_WKN_GRP, "Guests", "");
-       add_initial_entry(-1, "S-1-5-32-547", SID_NAME_WKN_GRP, "Power Users", "");
-       add_initial_entry(-1, "S-1-5-32-548", SID_NAME_WKN_GRP, "Account Operators", "");
-       add_initial_entry(-1, "S-1-5-32-549", SID_NAME_WKN_GRP, "System Operators", "");
-       add_initial_entry(-1, "S-1-5-32-550", SID_NAME_WKN_GRP, "Print Operators", "");
-       add_initial_entry(-1, "S-1-5-32-551", SID_NAME_WKN_GRP, "Backup Operators", "");
-       add_initial_entry(-1, "S-1-5-32-552", SID_NAME_WKN_GRP, "Replicators", "");
-
-       /* Add the defaults domain groups */
-
-       sid_copy(&sid_admins, get_global_sam_sid());
-       sid_append_rid(&sid_admins, DOMAIN_GROUP_RID_ADMINS);
-       sid_to_string(str_admins, &sid_admins);
-       add_initial_entry(-1, str_admins, SID_NAME_DOM_GRP, "Domain Admins", "");
-
-       sid_copy(&sid_users,  get_global_sam_sid());
-       sid_append_rid(&sid_users,  DOMAIN_GROUP_RID_USERS);
-       sid_to_string(str_users, &sid_users);
-       add_initial_entry(-1, str_users,  SID_NAME_DOM_GRP, "Domain Users",  "");
-
-       sid_copy(&sid_guests, get_global_sam_sid());
-       sid_append_rid(&sid_guests, DOMAIN_GROUP_RID_GUESTS);
-       sid_to_string(str_guests, &sid_guests);
-       add_initial_entry(-1, str_guests, SID_NAME_DOM_GRP, "Domain Guests", "");
-
-       return True;
-}
-
-/****************************************************************************
- Open the group mapping tdb.
-****************************************************************************/
-
 static BOOL init_group_mapping(void)
 {
-       const char *vstring = "INFO/version";
-       int32 vers_id;
-       
-       if (tdb)
-               return True;
-       tdb = tdb_open_log(lock_path("group_mapping.tdb"), 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
-       if (!tdb) {
-               DEBUG(0,("Failed to open group mapping database\n"));
-               return False;
-       }
-
-       /* handle a Samba upgrade */
-       tdb_lock_bystring(tdb, vstring, 0);
-
-       /* Cope with byte-reversed older versions of the db. */
-       vers_id = tdb_fetch_int32(tdb, vstring);
-       if ((vers_id == DATABASE_VERSION_V1) || (IREV(vers_id) == DATABASE_VERSION_V1)) {
-               /* Written on a bigendian machine with old fetch_int code. Save as le. */
-               tdb_store_int32(tdb, vstring, DATABASE_VERSION_V2);
-               vers_id = DATABASE_VERSION_V2;
-       }
-
-       if (vers_id != DATABASE_VERSION_V2) {
-               tdb_traverse(tdb, tdb_traverse_delete_fn, NULL);
-               tdb_store_int32(tdb, vstring, DATABASE_VERSION_V2);
-       }
-
-       tdb_unlock_bystring(tdb, vstring);
-
-       /* write a list of default groups */
-       if(!default_group_mapping())
-               return False;
-
-       return True;
-}
-
-/****************************************************************************
-****************************************************************************/
-static BOOL add_mapping_entry(GROUP_MAP *map, int flag)
-{
-       TDB_DATA kbuf, dbuf;
-       pstring key, buf;
-       fstring string_sid="";
-       int len;
+       const char *backend_string;
 
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return(False);
+       if (backend != NULL) {
+               /* already initialised */
+               return True;
        }
        
-       sid_to_string(string_sid, &map->sid);
-
-       len = tdb_pack(buf, sizeof(buf), "ddff",
-                       map->gid, map->sid_name_use, map->nt_name, map->comment);
-
-       if (len > sizeof(buf))
-               return False;
-
-       slprintf(key, sizeof(key), "%s%s", GROUP_PREFIX, string_sid);
-
-       kbuf.dsize = strlen(key)+1;
-       kbuf.dptr = key;
-       dbuf.dsize = len;
-       dbuf.dptr = buf;
-       if (tdb_store(tdb, kbuf, dbuf, flag) != 0) return False;
-
-       return True;
+       /* default to using the ldb backend. This parameter should
+          disappear in future versions of Samba3, but for now it
+          provides a safety net in case any major problems are
+          discovered with ldb after the release */        
+       backend_string = lp_parm_const_string(-1, "groupdb", "backend", "ldb");
+
+       if (strcmp(backend_string, "ldb") == 0) {
+               backend = groupdb_ldb_init();
+       } else if (strcmp(backend_string, "tdb") == 0) {
+               backend = groupdb_tdb_init();
+       } else {
+               DEBUG(0,("Unknown groupdb backend '%s'\n", backend_string));
+               smb_panic("Unknown groupdb backend\n");
+       }
+       return backend != NULL;
 }
 
 /****************************************************************************
 initialise first time the mapping list
 ****************************************************************************/
-NTSTATUS add_initial_entry(gid_t gid, const char *sid, enum SID_NAME_USE sid_name_use, const char *nt_name, const char *comment)
+NTSTATUS add_initial_entry(gid_t gid, const char *sid, enum lsa_SidType sid_name_use, const char *nt_name, const char *comment)
 {
        GROUP_MAP map;
 
@@ -179,373 +80,6 @@ NTSTATUS add_initial_entry(gid_t gid, const char *sid, enum SID_NAME_USE sid_nam
        return pdb_add_group_mapping_entry(&map);
 }
 
-/****************************************************************************
- Map a unix group to a newly created mapping
-****************************************************************************/
-NTSTATUS map_unix_group(const struct group *grp, GROUP_MAP *pmap)
-{
-       NTSTATUS status;
-       GROUP_MAP map;
-       const char *grpname, *dom, *name;
-       uint32 rid;
-
-       if (pdb_getgrgid(&map, grp->gr_gid)) {
-               return NT_STATUS_GROUP_EXISTS;
-       }
-
-       map.gid = grp->gr_gid;
-       grpname = grp->gr_name;
-
-       if (lookup_name(tmp_talloc_ctx(), grpname, LOOKUP_NAME_ISOLATED,
-                       &dom, &name, NULL, NULL)) {
-
-               const char *tmp = talloc_asprintf(
-                       tmp_talloc_ctx(), "Unix Group %s", grp->gr_name);
-
-               DEBUG(5, ("%s exists as %s\\%s, retrying as \"%s\"\n",
-                         grpname, dom, name, tmp));
-               grpname = tmp;
-       }
-
-       if (lookup_name(tmp_talloc_ctx(), grpname, LOOKUP_NAME_ISOLATED,
-                       NULL, NULL, NULL, NULL)) {
-               DEBUG(3, ("\"%s\" exists, can't map it\n", grp->gr_name));
-               return NT_STATUS_GROUP_EXISTS;
-       }
-
-       fstrcpy(map.nt_name, grpname);
-
-       if (pdb_rid_algorithm()) {
-               rid = pdb_gid_to_group_rid( grp->gr_gid );
-       } else {
-               if (!pdb_new_rid(&rid)) {
-                       DEBUG(3, ("Could not get a new RID for %s\n",
-                                 grp->gr_name));
-                       return NT_STATUS_ACCESS_DENIED;
-               }
-       }
-
-       sid_compose(&map.sid, get_global_sam_sid(), rid);
-       map.sid_name_use = SID_NAME_DOM_GRP;
-       fstrcpy(map.comment, talloc_asprintf(tmp_talloc_ctx(), "Unix Group %s",
-                                            grp->gr_name));
-
-       status = pdb_add_group_mapping_entry(&map);
-       if (NT_STATUS_IS_OK(status)) {
-               *pmap = map;
-       }
-       return status;
-}
-
-/****************************************************************************
- Return the sid and the type of the unix group.
-****************************************************************************/
-
-static BOOL get_group_map_from_sid(DOM_SID sid, GROUP_MAP *map)
-{
-       TDB_DATA kbuf, dbuf;
-       pstring key;
-       fstring string_sid;
-       int ret = 0;
-       
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return(False);
-       }
-
-       /* the key is the SID, retrieving is direct */
-
-       sid_to_string(string_sid, &sid);
-       slprintf(key, sizeof(key), "%s%s", GROUP_PREFIX, string_sid);
-
-       kbuf.dptr = key;
-       kbuf.dsize = strlen(key)+1;
-               
-       dbuf = tdb_fetch(tdb, kbuf);
-       if (!dbuf.dptr)
-               return False;
-
-       ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff",
-                               &map->gid, &map->sid_name_use, &map->nt_name, &map->comment);
-
-       SAFE_FREE(dbuf.dptr);
-       
-       if ( ret == -1 ) {
-               DEBUG(3,("get_group_map_from_sid: tdb_unpack failure\n"));
-               return False;
-       }
-
-       sid_copy(&map->sid, &sid);
-       
-       return True;
-}
-
-/****************************************************************************
- Return the sid and the type of the unix group.
-****************************************************************************/
-
-static BOOL get_group_map_from_gid(gid_t gid, GROUP_MAP *map)
-{
-       TDB_DATA kbuf, dbuf, newkey;
-       fstring string_sid;
-       int ret;
-
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return(False);
-       }
-
-       /* we need to enumerate the TDB to find the GID */
-
-       for (kbuf = tdb_firstkey(tdb); 
-            kbuf.dptr; 
-            newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
-
-               if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0) continue;
-               
-               dbuf = tdb_fetch(tdb, kbuf);
-               if (!dbuf.dptr)
-                       continue;
-
-               fstrcpy(string_sid, kbuf.dptr+strlen(GROUP_PREFIX));
-
-               string_to_sid(&map->sid, string_sid);
-               
-               ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff",
-                                &map->gid, &map->sid_name_use, &map->nt_name, &map->comment);
-
-               SAFE_FREE(dbuf.dptr);
-
-               if ( ret == -1 ) {
-                       DEBUG(3,("get_group_map_from_gid: tdb_unpack failure\n"));
-                       return False;
-               }
-       
-               if (gid==map->gid) {
-                       SAFE_FREE(kbuf.dptr);
-                       return True;
-               }
-       }
-
-       return False;
-}
-
-/****************************************************************************
- Return the sid and the type of the unix group.
-****************************************************************************/
-
-static BOOL get_group_map_from_ntname(const char *name, GROUP_MAP *map)
-{
-       TDB_DATA kbuf, dbuf, newkey;
-       fstring string_sid;
-       int ret;
-
-       if(!init_group_mapping()) {
-               DEBUG(0,("get_group_map_from_ntname:failed to initialize group mapping\n"));
-               return(False);
-       }
-
-       /* we need to enumerate the TDB to find the name */
-
-       for (kbuf = tdb_firstkey(tdb); 
-            kbuf.dptr; 
-            newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
-
-               if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0) continue;
-               
-               dbuf = tdb_fetch(tdb, kbuf);
-               if (!dbuf.dptr)
-                       continue;
-
-               fstrcpy(string_sid, kbuf.dptr+strlen(GROUP_PREFIX));
-
-               string_to_sid(&map->sid, string_sid);
-               
-               ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff",
-                                &map->gid, &map->sid_name_use, &map->nt_name, &map->comment);
-
-               SAFE_FREE(dbuf.dptr);
-               
-               if ( ret == -1 ) {
-                       DEBUG(3,("get_group_map_from_ntname: tdb_unpack failure\n"));
-                       return False;
-               }
-
-               if (StrCaseCmp(name, map->nt_name)==0) {
-                       SAFE_FREE(kbuf.dptr);
-                       return True;
-               }
-       }
-
-       return False;
-}
-
-/****************************************************************************
- Remove a group mapping entry.
-****************************************************************************/
-
-static BOOL group_map_remove(const DOM_SID *sid)
-{
-       TDB_DATA kbuf, dbuf;
-       pstring key;
-       fstring string_sid;
-       
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return(False);
-       }
-
-       /* the key is the SID, retrieving is direct */
-
-       sid_to_string(string_sid, sid);
-       slprintf(key, sizeof(key), "%s%s", GROUP_PREFIX, string_sid);
-
-       kbuf.dptr = key;
-       kbuf.dsize = strlen(key)+1;
-               
-       dbuf = tdb_fetch(tdb, kbuf);
-       if (!dbuf.dptr)
-               return False;
-       
-       SAFE_FREE(dbuf.dptr);
-
-       if(tdb_delete(tdb, kbuf) != TDB_SUCCESS)
-               return False;
-
-       return True;
-}
-
-/****************************************************************************
- Enumerate the group mapping.
-****************************************************************************/
-
-static BOOL enum_group_mapping(enum SID_NAME_USE sid_name_use, GROUP_MAP **pp_rmap,
-                       size_t *p_num_entries, BOOL unix_only)
-{
-       TDB_DATA kbuf, dbuf, newkey;
-       fstring string_sid;
-       GROUP_MAP map;
-       GROUP_MAP *mapt;
-       int ret;
-       size_t entries=0;
-
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return(False);
-       }
-
-       *p_num_entries=0;
-       *pp_rmap=NULL;
-
-       for (kbuf = tdb_firstkey(tdb); 
-            kbuf.dptr; 
-            newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
-
-               if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0)
-                       continue;
-
-               dbuf = tdb_fetch(tdb, kbuf);
-               if (!dbuf.dptr)
-                       continue;
-
-               fstrcpy(string_sid, kbuf.dptr+strlen(GROUP_PREFIX));
-                               
-               ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddff",
-                                &map.gid, &map.sid_name_use, &map.nt_name, &map.comment);
-
-               SAFE_FREE(dbuf.dptr);
-
-               if ( ret == -1 ) {
-                       DEBUG(3,("enum_group_mapping: tdb_unpack failure\n"));
-                       continue;
-               }
-       
-               /* list only the type or everything if UNKNOWN */
-               if (sid_name_use!=SID_NAME_UNKNOWN  && sid_name_use!=map.sid_name_use) {
-                       DEBUG(11,("enum_group_mapping: group %s is not of the requested type\n", map.nt_name));
-                       continue;
-               }
-
-               if (unix_only==ENUM_ONLY_MAPPED && map.gid==-1) {
-                       DEBUG(11,("enum_group_mapping: group %s is non mapped\n", map.nt_name));
-                       continue;
-               }
-
-               string_to_sid(&map.sid, string_sid);
-               
-               DEBUG(11,("enum_group_mapping: returning group %s of "
-                         "type %s\n", map.nt_name,
-                         sid_type_lookup(map.sid_name_use)));
-
-               (*pp_rmap) = SMB_REALLOC_ARRAY((*pp_rmap), GROUP_MAP, entries+1);
-               if (!(*pp_rmap)) {
-                       DEBUG(0,("enum_group_mapping: Unable to enlarge group map!\n"));
-                       return False;
-               }
-
-               mapt = (*pp_rmap);
-
-               mapt[entries].gid = map.gid;
-               sid_copy( &mapt[entries].sid, &map.sid);
-               mapt[entries].sid_name_use = map.sid_name_use;
-               fstrcpy(mapt[entries].nt_name, map.nt_name);
-               fstrcpy(mapt[entries].comment, map.comment);
-
-               entries++;
-
-       }
-
-       *p_num_entries=entries;
-
-       return True;
-}
-
-/* This operation happens on session setup, so it should better be fast. We
- * store a list of aliases a SID is member of hanging off MEMBEROF/SID. */
-
-static NTSTATUS one_alias_membership(const DOM_SID *member,
-                                    DOM_SID **sids, size_t *num)
-{
-       fstring key, string_sid;
-       TDB_DATA kbuf, dbuf;
-       const char *p;
-
-       if (!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return NT_STATUS_ACCESS_DENIED;
-       }
-
-       sid_to_string(string_sid, member);
-       slprintf(key, sizeof(key), "%s%s", MEMBEROF_PREFIX, string_sid);
-
-       kbuf.dsize = strlen(key)+1;
-       kbuf.dptr = key;
-
-       dbuf = tdb_fetch(tdb, kbuf);
-
-       if (dbuf.dptr == NULL) {
-               return NT_STATUS_OK;
-       }
-
-       p = dbuf.dptr;
-
-       while (next_token(&p, string_sid, " ", sizeof(string_sid))) {
-
-               DOM_SID alias;
-
-               if (!string_to_sid(&alias, string_sid))
-                       continue;
-
-               add_sid_to_array_unique(NULL, &alias, sids, num);
-
-               if (sids == NULL)
-                       return NT_STATUS_NO_MEMORY;
-       }
-
-       SAFE_FREE(dbuf.dptr);
-       return NT_STATUS_OK;
-}
-
 static NTSTATUS alias_memberships(const DOM_SID *members, size_t num_members,
                                  DOM_SID **sids, size_t *num)
 {
@@ -555,242 +89,20 @@ static NTSTATUS alias_memberships(const DOM_SID *members, size_t num_members,
        *sids = NULL;
 
        for (i=0; i<num_members; i++) {
-               NTSTATUS status = one_alias_membership(&members[i], sids, num);
+               NTSTATUS status = backend->one_alias_membership(&members[i], sids, num);
                if (!NT_STATUS_IS_OK(status))
                        return status;
        }
        return NT_STATUS_OK;
 }
 
-static BOOL is_aliasmem(const DOM_SID *alias, const DOM_SID *member)
-{
-       DOM_SID *sids;
-       size_t i, num;
-
-       /* This feels the wrong way round, but the on-disk data structure
-        * dictates it this way. */
-       if (!NT_STATUS_IS_OK(alias_memberships(member, 1, &sids, &num)))
-               return False;
-
-       for (i=0; i<num; i++) {
-               if (sid_compare(alias, &sids[i]) == 0) {
-                       SAFE_FREE(sids);
-                       return True;
-               }
-       }
-       SAFE_FREE(sids);
-       return False;
-}
-
-static NTSTATUS add_aliasmem(const DOM_SID *alias, const DOM_SID *member)
-{
-       GROUP_MAP map;
-       TDB_DATA kbuf, dbuf;
-       pstring key;
-       fstring string_sid;
-       char *new_memberstring;
-       int result;
-
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return NT_STATUS_ACCESS_DENIED;
-       }
-
-       if (!get_group_map_from_sid(*alias, &map))
-               return NT_STATUS_NO_SUCH_ALIAS;
-
-       if ( (map.sid_name_use != SID_NAME_ALIAS) &&
-            (map.sid_name_use != SID_NAME_WKN_GRP) )
-               return NT_STATUS_NO_SUCH_ALIAS;
-
-       if (is_aliasmem(alias, member))
-               return NT_STATUS_MEMBER_IN_ALIAS;
-
-       sid_to_string(string_sid, member);
-       slprintf(key, sizeof(key), "%s%s", MEMBEROF_PREFIX, string_sid);
-
-       kbuf.dsize = strlen(key)+1;
-       kbuf.dptr = key;
-
-       dbuf = tdb_fetch(tdb, kbuf);
-
-       sid_to_string(string_sid, alias);
-
-       if (dbuf.dptr != NULL) {
-               asprintf(&new_memberstring, "%s %s", (char *)(dbuf.dptr),
-                        string_sid);
-       } else {
-               new_memberstring = SMB_STRDUP(string_sid);
-       }
-
-       if (new_memberstring == NULL)
-               return NT_STATUS_NO_MEMORY;
-
-       SAFE_FREE(dbuf.dptr);
-       dbuf.dsize = strlen(new_memberstring)+1;
-       dbuf.dptr = new_memberstring;
-
-       result = tdb_store(tdb, kbuf, dbuf, 0);
-
-       SAFE_FREE(new_memberstring);
-
-       return (result == 0 ? NT_STATUS_OK : NT_STATUS_ACCESS_DENIED);
-}
-
 struct aliasmem_closure {
        const DOM_SID *alias;
        DOM_SID **sids;
        size_t *num;
 };
 
-static int collect_aliasmem(TDB_CONTEXT *tdb_ctx, TDB_DATA key, TDB_DATA data,
-                           void *state)
-{
-       struct aliasmem_closure *closure = (struct aliasmem_closure *)state;
-       const char *p;
-       fstring alias_string;
-
-       if (strncmp(key.dptr, MEMBEROF_PREFIX,
-                   strlen(MEMBEROF_PREFIX)) != 0)
-               return 0;
-
-       p = data.dptr;
-
-       while (next_token(&p, alias_string, " ", sizeof(alias_string))) {
-
-               DOM_SID alias, member;
-               const char *member_string;
-               
-
-               if (!string_to_sid(&alias, alias_string))
-                       continue;
-
-               if (sid_compare(closure->alias, &alias) != 0)
-                       continue;
-
-               /* Ok, we found the alias we're looking for in the membership
-                * list currently scanned. The key represents the alias
-                * member. Add that. */
-
-               member_string = strchr(key.dptr, '/');
-
-               /* Above we tested for MEMBEROF_PREFIX which includes the
-                * slash. */
 
-               SMB_ASSERT(member_string != NULL);
-               member_string += 1;
-
-               if (!string_to_sid(&member, member_string))
-                       continue;
-               
-               add_sid_to_array(NULL, &member, closure->sids, closure->num);
-       }
-
-       return 0;
-}
-
-static NTSTATUS enum_aliasmem(const DOM_SID *alias, DOM_SID **sids, size_t *num)
-{
-       GROUP_MAP map;
-       struct aliasmem_closure closure;
-
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return NT_STATUS_ACCESS_DENIED;
-       }
-
-       if (!get_group_map_from_sid(*alias, &map))
-               return NT_STATUS_NO_SUCH_ALIAS;
-
-       if ( (map.sid_name_use != SID_NAME_ALIAS) &&
-            (map.sid_name_use != SID_NAME_WKN_GRP) )
-               return NT_STATUS_NO_SUCH_ALIAS;
-
-       *sids = NULL;
-       *num = 0;
-
-       closure.alias = alias;
-       closure.sids = sids;
-       closure.num = num;
-
-       tdb_traverse(tdb, collect_aliasmem, &closure);
-       return NT_STATUS_OK;
-}
-
-static NTSTATUS del_aliasmem(const DOM_SID *alias, const DOM_SID *member)
-{
-       NTSTATUS result;
-       DOM_SID *sids;
-       size_t i, num;
-       BOOL found = False;
-       char *member_string;
-       TDB_DATA kbuf, dbuf;
-       pstring key;
-       fstring sid_string;
-
-       result = alias_memberships(member, 1, &sids, &num);
-
-       if (!NT_STATUS_IS_OK(result))
-               return result;
-
-       for (i=0; i<num; i++) {
-               if (sid_compare(&sids[i], alias) == 0) {
-                       found = True;
-                       break;
-               }
-       }
-
-       if (!found) {
-               SAFE_FREE(sids);
-               return NT_STATUS_MEMBER_NOT_IN_ALIAS;
-       }
-
-       if (i < num)
-               sids[i] = sids[num-1];
-
-       num -= 1;
-
-       sid_to_string(sid_string, member);
-       slprintf(key, sizeof(key), "%s%s", MEMBEROF_PREFIX, sid_string);
-
-       kbuf.dsize = strlen(key)+1;
-       kbuf.dptr = key;
-
-       if (num == 0)
-               return tdb_delete(tdb, kbuf) == 0 ?
-                       NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
-
-       member_string = SMB_STRDUP("");
-
-       if (member_string == NULL) {
-               SAFE_FREE(sids);
-               return NT_STATUS_NO_MEMORY;
-       }
-
-       for (i=0; i<num; i++) {
-               char *s = member_string;
-
-               sid_to_string(sid_string, &sids[i]);
-               asprintf(&member_string, "%s %s", s, sid_string);
-
-               SAFE_FREE(s);
-               if (member_string == NULL) {
-                       SAFE_FREE(sids);
-                       return NT_STATUS_NO_MEMORY;
-               }
-       }
-
-       dbuf.dsize = strlen(member_string)+1;
-       dbuf.dptr = member_string;
-
-       result = tdb_store(tdb, kbuf, dbuf, 0) == 0 ?
-               NT_STATUS_OK : NT_STATUS_ACCESS_DENIED;
-
-       SAFE_FREE(sids);
-       SAFE_FREE(member_string);
-
-       return result;
-}
 
 /*
  *
@@ -822,8 +134,24 @@ BOOL get_domain_group_from_sid(DOM_SID sid, GROUP_MAP *map)
        ret = pdb_getgrsid(map, sid);
        unbecome_root();
        
-       if ( !ret ) 
+       /* special case check for rid 513 */
+       
+       if ( !ret ) {
+               uint32 rid;
+               
+               sid_peek_rid( &sid, &rid );
+               
+               if ( rid == DOMAIN_GROUP_RID_USERS ) {
+                       fstrcpy( map->nt_name, "None" );
+                       fstrcpy( map->comment, "Ordinary Users" );
+                       sid_copy( &map->sid, &sid );
+                       map->sid_name_use = SID_NAME_DOM_GRP;
+                       
+                       return True;
+               }
+               
                return False;
+       }
 
        DEBUG(10, ("get_domain_group_from_sid: SID found in the TDB\n"));
 
@@ -870,9 +198,12 @@ int smb_create_group(const char *unix_group, gid_t *new_gid)
                pstring_sub(add_script, "%g", unix_group);
                ret = smbrun(add_script, &fd);
                DEBUG(ret ? 0 : 3,("smb_create_group: Running the command `%s' gave %d\n",add_script,ret));
+               if (ret == 0) {
+                       smb_nscd_flush_group_cache();
+               }
                if (ret != 0)
                        return ret;
-                       
+
                if (fd != 0) {
                        fstring output;
 
@@ -912,6 +243,9 @@ int smb_delete_group(const char *unix_group)
                pstring_sub(del_script, "%g", unix_group);
                ret = smbrun(del_script,NULL);
                DEBUG(ret ? 0 : 3,("smb_delete_group: Running the command `%s' gave %d\n",del_script,ret));
+               if (ret == 0) {
+                       smb_nscd_flush_group_cache();
+               }
                return ret;
        }
                
@@ -936,6 +270,9 @@ int smb_set_primary_group(const char *unix_group, const char* unix_user)
                flush_pwnam_cache();
                DEBUG(ret ? 0 : 3,("smb_set_primary_group: "
                         "Running the command `%s' gave %d\n",add_script,ret));
+               if (ret == 0) {
+                       smb_nscd_flush_group_cache();
+               }
                return ret;
        }
 
@@ -959,6 +296,9 @@ int smb_add_user_group(const char *unix_group, const char *unix_user)
                pstring_sub(add_script, "%u", unix_user);
                ret = smbrun(add_script,NULL);
                DEBUG(ret ? 0 : 3,("smb_add_user_group: Running the command `%s' gave %d\n",add_script,ret));
+               if (ret == 0) {
+                       smb_nscd_flush_group_cache();
+               }
                return ret;
        }
        
@@ -982,6 +322,9 @@ int smb_delete_user_group(const char *unix_group, const char *unix_user)
                pstring_sub(del_script, "%u", unix_user);
                ret = smbrun(del_script,NULL);
                DEBUG(ret ? 0 : 3,("smb_delete_user_group: Running the command `%s' gave %d\n",del_script,ret));
+               if (ret == 0) {
+                       smb_nscd_flush_group_cache();
+               }
                return ret;
        }
        
@@ -992,75 +335,87 @@ int smb_delete_user_group(const char *unix_group, const char *unix_user)
 NTSTATUS pdb_default_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
                                 DOM_SID sid)
 {
-       return get_group_map_from_sid(sid, map) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->get_group_map_from_sid(sid, map) ?
                NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 }
 
 NTSTATUS pdb_default_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
                                 gid_t gid)
 {
-       return get_group_map_from_gid(gid, map) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->get_group_map_from_gid(gid, map) ?
                NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 }
 
 NTSTATUS pdb_default_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
                                 const char *name)
 {
-       return get_group_map_from_ntname(name, map) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->get_group_map_from_ntname(name, map) ?
                NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 }
 
 NTSTATUS pdb_default_add_group_mapping_entry(struct pdb_methods *methods,
                                                GROUP_MAP *map)
 {
-       return add_mapping_entry(map, TDB_INSERT) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->add_mapping_entry(map, TDB_INSERT) ?
                NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 }
 
 NTSTATUS pdb_default_update_group_mapping_entry(struct pdb_methods *methods,
                                                   GROUP_MAP *map)
 {
-       return add_mapping_entry(map, TDB_REPLACE) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->add_mapping_entry(map, TDB_REPLACE) ?
                NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 }
 
 NTSTATUS pdb_default_delete_group_mapping_entry(struct pdb_methods *methods,
                                                   DOM_SID sid)
 {
-       return group_map_remove(&sid) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->group_map_remove(&sid) ?
                NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 }
 
 NTSTATUS pdb_default_enum_group_mapping(struct pdb_methods *methods,
-                                          enum SID_NAME_USE sid_name_use,
+                                          const DOM_SID *sid, enum lsa_SidType sid_name_use,
                                           GROUP_MAP **pp_rmap, size_t *p_num_entries,
                                           BOOL unix_only)
 {
-       return enum_group_mapping(sid_name_use, pp_rmap, p_num_entries, unix_only) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->enum_group_mapping(sid, sid_name_use, pp_rmap, p_num_entries, unix_only) ?
                NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 }
 
-NTSTATUS pdb_default_find_alias(struct pdb_methods *methods,
-                               const char *name, DOM_SID *sid)
-{
-       GROUP_MAP map;
-
-       if (!pdb_getgrnam(&map, name))
-               return NT_STATUS_NO_SUCH_ALIAS;
-
-       if ((map.sid_name_use != SID_NAME_WKN_GRP) &&
-           (map.sid_name_use != SID_NAME_ALIAS))
-               return NT_STATUS_OBJECT_TYPE_MISMATCH;
-
-       sid_copy(sid, &map.sid);
-       return NT_STATUS_OK;
-}
-
 NTSTATUS pdb_default_create_alias(struct pdb_methods *methods,
                                  const char *name, uint32 *rid)
 {
        DOM_SID sid;
-       enum SID_NAME_USE type;
+       enum lsa_SidType type;
        uint32 new_rid;
        gid_t gid;
        BOOL exists;
@@ -1156,6 +511,7 @@ NTSTATUS pdb_default_set_aliasinfo(struct pdb_methods *methods,
        if (!pdb_getgrsid(&map, *sid))
                return NT_STATUS_NO_SUCH_ALIAS;
 
+       fstrcpy(map.nt_name, info->acct_name);
        fstrcpy(map.comment, info->acct_desc);
 
        return pdb_update_group_mapping_entry(&map);
@@ -1164,20 +520,32 @@ NTSTATUS pdb_default_set_aliasinfo(struct pdb_methods *methods,
 NTSTATUS pdb_default_add_aliasmem(struct pdb_methods *methods,
                                  const DOM_SID *alias, const DOM_SID *member)
 {
-       return add_aliasmem(alias, member);
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->add_aliasmem(alias, member);
 }
 
 NTSTATUS pdb_default_del_aliasmem(struct pdb_methods *methods,
                                  const DOM_SID *alias, const DOM_SID *member)
 {
-       return del_aliasmem(alias, member);
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->del_aliasmem(alias, member);
 }
 
 NTSTATUS pdb_default_enum_aliasmem(struct pdb_methods *methods,
                                   const DOM_SID *alias, DOM_SID **pp_members,
                                   size_t *p_num_members)
 {
-       return enum_aliasmem(alias, pp_members, p_num_members);
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->enum_aliasmem(alias, pp_members, p_num_members);
 }
 
 NTSTATUS pdb_default_alias_memberships(struct pdb_methods *methods,
@@ -1192,6 +560,11 @@ NTSTATUS pdb_default_alias_memberships(struct pdb_methods *methods,
        size_t i, num_alias_sids;
        NTSTATUS result;
 
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+
        alias_sids = NULL;
        num_alias_sids = 0;
 
@@ -1201,12 +574,17 @@ NTSTATUS pdb_default_alias_memberships(struct pdb_methods *methods,
        if (!NT_STATUS_IS_OK(result))
                return result;
 
+       *p_num_alias_rids = 0;
+
+       if (num_alias_sids == 0) {
+               TALLOC_FREE(alias_sids);
+               return NT_STATUS_OK;
+       }
+
        *pp_alias_rids = TALLOC_ARRAY(mem_ctx, uint32, num_alias_sids);
        if (*pp_alias_rids == NULL)
                return NT_STATUS_NO_MEMORY;
 
-       *p_num_alias_rids = 0;
-
        for (i=0; i<num_alias_sids; i++) {
                if (!sid_peek_check_rid(domain_sid, &alias_sids[i],
                                        &(*pp_alias_rids)[*p_num_alias_rids]))
@@ -1214,7 +592,7 @@ NTSTATUS pdb_default_alias_memberships(struct pdb_methods *methods,
                *p_num_alias_rids += 1;
        }
 
-       SAFE_FREE(alias_sids);
+       TALLOC_FREE(alias_sids);
 
        return NT_STATUS_OK;
 }
@@ -1260,7 +638,7 @@ NTSTATUS pdb_nop_delete_group_mapping_entry(struct pdb_methods *methods,
 }
 
 NTSTATUS pdb_nop_enum_group_mapping(struct pdb_methods *methods,
-                                          enum SID_NAME_USE sid_name_use,
+                                          enum lsa_SidType sid_name_use,
                                           GROUP_MAP **rmap, size_t *num_entries,
                                           BOOL unix_only)
 {
@@ -1301,4 +679,62 @@ BOOL pdb_set_dom_grp_info(const DOM_SID *sid, const struct acct_info *info)
        return NT_STATUS_IS_OK(pdb_update_group_mapping_entry(&map));
 }
 
+/********************************************************************
+ Really just intended to be called by smbd
+********************************************************************/
+
+NTSTATUS pdb_create_builtin_alias(uint32 rid)
+{
+       DOM_SID sid;
+       enum lsa_SidType type;
+       gid_t gid;
+       GROUP_MAP map;
+       TALLOC_CTX *mem_ctx;
+       NTSTATUS status;
+       const char *name = NULL;
+       fstring groupname;
+
+       DEBUG(10, ("Trying to create builtin alias %d\n", rid));
+       
+       if ( !sid_compose( &sid, &global_sid_Builtin, rid ) ) {
+               return NT_STATUS_NO_SUCH_ALIAS;
+       }
+       
+       if ( (mem_ctx = talloc_new(NULL)) == NULL ) {
+               return NT_STATUS_NO_MEMORY;
+       }
+       
+       if ( !lookup_sid(mem_ctx, &sid, NULL, &name, &type) ) {
+               TALLOC_FREE( mem_ctx );
+               return NT_STATUS_NO_SUCH_ALIAS;
+       }
+       
+       /* validate RID so copy the name and move on */
+               
+       fstrcpy( groupname, name );
+       TALLOC_FREE( mem_ctx );
+
+       if (!winbind_allocate_gid(&gid)) {
+               DEBUG(3, ("pdb_create_builtin_alias: Could not get a gid out of winbind\n"));
+               return NT_STATUS_ACCESS_DENIED;
+       }
+
+       DEBUG(10,("Creating alias %s with gid %d\n", name, gid));
+
+       map.gid = gid;
+       sid_copy(&map.sid, &sid);
+       map.sid_name_use = SID_NAME_ALIAS;
+       fstrcpy(map.nt_name, name);
+       fstrcpy(map.comment, "");
+
+       status = pdb_add_group_mapping_entry(&map);
+
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(0, ("pdb_create_builtin_alias: Could not add group mapping entry for alias %d "
+                         "(%s)\n", rid, nt_errstr(status)));
+       }
+
+       return status;
+}
+