s3:idmap_tdb: add a idmap_tdb_new_mapping().

High level function to create a new mapping for an unmapped sid.
This builds logic that used to reside in the top level idmap code
in the backend. To be called inside a transaction to guarantee
atomicity of the operation.

1 files changed, 52 insertions, 0 deletions

diff --git a/source3/winbindd/idmap_tdb.c b/source3/winbindd/idmap_tdb.c
index b155bde81d..854b24c601 100644
--- a/source3/winbindd/idmap_tdb.c
+++ b/source3/winbindd/idmap_tdb.c
@@ -610,6 +610,58 @@ done:
 	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_tdb_new_mapping(struct idmap_domain *dom, struct id_map *map)
+{
+	NTSTATUS ret;
+
+	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;
+	}
+
+	ret = idmap_tdb_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_tdb_set_mapping(dom, map);
+	if (!NT_STATUS_IS_OK(ret)) {
+		DEBUG(3, ("Could not store the new mapping: %s\n",
+			  nt_errstr(ret)));
+	}
+
+done:
+	return ret;
+}
+
+
 /**********************************
  Single id to sid lookup function. 
 **********************************/