Add configure option --with-device-nodes-on

Make configurable default behaviour how to deal with device node creates.
With udev system natural options should be  'resume'.
For older systems where user expect there is node in /dev/mapper immediately
after  dmsetup create --notable  -  use 'create'

FIXME:
Code needs fixing passing this flag through udev cookie.

configure

@@ -788,6 +788,7 @@ with_group
 with_device_uid
 with_device_gid
 with_device_mode
+with_device_nodes_on
 enable_lvm1_fallback
 with_lvm1
 with_pool
@@ -1526,6 +1527,8 @@ Optional Packages:
   --with-device-uid=UID   set the owner used for new device nodes [[UID=0]]
   --with-device-gid=GID   set the group used for new device nodes [[GID=0]]
   --with-device-mode=MODE set the mode used for new device nodes [[MODE=0600]]
+  --with-device-nodes-on=ON
+                          create nodes on resume or create [[ON=resume]]
   --with-lvm1=TYPE        LVM1 metadata support: internal/shared/none
                           [[TYPE=internal]]
   --with-pool=TYPE        GFS pool read-only support: internal/shared/none
@@ -6711,6 +6714,29 @@ fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DM_DEVICE_MODE" >&5
 $as_echo "$DM_DEVICE_MODE" >&6; }
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking when to create device nodes" >&5
+$as_echo_n "checking when to create device nodes... " >&6; }
+
+# Check whether --with-device-nodes-on was given.
+if test "${with_device_nodes_on+set}" = set; then :
+  withval=$with_device_nodes_on; ADD_NODE=$withval
+else
+  ADD_NODE=resume
+fi
+
+case "$ADD_NODE" in
+ resume) add_on=DM_ADD_NODE_ON_RESUME;;
+ create) add_on=DM_ADD_NODE_ON_CREATE;;
+ *) as_fn_error $? "--with-device-nodes-on parameter invalid" "$LINENO" 5;;
+esac
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: on $ADD_NODE" >&5
+$as_echo "on $ADD_NODE" >&6; }
+
+cat >>confdefs.h <<_ACEOF
+#define DEFAULT_DM_ADD_NODE $add_on
+_ACEOF
+
+
 ################################################################################
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable lvm1 fallback" >&5
 $as_echo_n "checking whether to enable lvm1 fallback... " >&6; }

configure.in

@@ -213,6 +213,19 @@ AC_ARG_WITH(device-mode,
 	    DM_DEVICE_MODE=$withval, DM_DEVICE_MODE=0600)
 AC_MSG_RESULT($DM_DEVICE_MODE)
 
+AC_MSG_CHECKING(when to create device nodes)
+AC_ARG_WITH(device-nodes-on,
+	    AC_HELP_STRING([--with-device-nodes-on=ON],
+			   [create nodes on resume or create [[ON=resume]]]),
+	    ADD_NODE=$withval, ADD_NODE=resume)
+case "$ADD_NODE" in
+ resume) add_on=DM_ADD_NODE_ON_RESUME;;
+ create) add_on=DM_ADD_NODE_ON_CREATE;;
+ *) AC_MSG_ERROR([--with-device-nodes-on parameter invalid]);;
+esac
+AC_MSG_RESULT(on $ADD_NODE)
+AC_DEFINE_UNQUOTED([DEFAULT_DM_ADD_NODE], $add_on, [Define default node creation behavior with dmsetup create])
+
 ################################################################################
 dnl -- LVM1 tool fallback option
 AC_MSG_CHECKING(whether to enable lvm1 fallback)

lib/misc/configure.h.in

@@ -35,6 +35,9 @@
 /* Default data alignment. */
 #undef DEFAULT_DATA_ALIGNMENT
 
+/* Define default node creation behavior with dmsetup create */
+#undef DEFAULT_DM_ADD_NODE
+
 /* Name of default locking directory. */
 #undef DEFAULT_LOCK_DIR
 

tools/dmsetup.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
- * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
  * Copyright (C) 2005-2007 NEC Corporation
  *
  * This file is part of the device-mapper userspace tools.
@@ -507,6 +507,22 @@ static int _set_task_device(struct dm_task *dmt, const char *name, int optional)
 	return 1;
 }
 
+static int _set_task_add_node(struct dm_task *dmt)
+{
+	if (!dm_task_set_add_node(dmt, DEFAULT_DM_ADD_NODE))
+		return 0;
+
+	if (_switches[ADD_NODE_ON_RESUME_ARG] &&
+	    !dm_task_set_add_node(dmt, DM_ADD_NODE_ON_RESUME))
+		return 0;
+
+	if (_switches[ADD_NODE_ON_CREATE_ARG] &&
+	    !dm_task_set_add_node(dmt, DM_ADD_NODE_ON_CREATE))
+		return 0;
+
+	return 1;
+}
+
 static int _load(int argc, char **argv, void *data __attribute__((unused)))
 {
 	int r = 0;
@@ -626,13 +642,9 @@ static int _create(int argc, char **argv, void *data __attribute__((unused)))
 		udev_flags |= DM_UDEV_DISABLE_DM_RULES_FLAG |
 			      DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG;
 
-	if (_switches[ADD_NODE_ON_RESUME_ARG] &&
-	    !dm_task_set_add_node(dmt, DM_ADD_NODE_ON_RESUME))
-		goto out;
 
-	if (_switches[ADD_NODE_ON_CREATE_ARG] &&
+	if (!_set_task_add_node(dmt))
-	    !dm_task_set_add_node(dmt, DM_ADD_NODE_ON_CREATE))
+                goto out;
-		goto out;
 
 	if (_udev_cookie) {
 		cookie = _udev_cookie;
@@ -1206,6 +1218,10 @@ static int _simple(int task, const char *name, uint32_t event_nr, int display)
 	if (_switches[NOLOCKFS_ARG] && !dm_task_skip_lockfs(dmt))
 		goto out;
 
+	/* FIXME: needs to coperate with udev */
+	if (!_set_task_add_node(dmt))
+                goto out;
+
 	if (_switches[READAHEAD_ARG] &&
 	    !dm_task_set_read_ahead(dmt, _int_args[READAHEAD_ARG],
 				    _read_ahead_flags))
@@ -2709,7 +2725,7 @@ static struct command _commands[] = {
 	{"remove", "[-f|--force] <device>", 0, 1, _remove},
 	{"remove_all", "[-f|--force]", 0, 0, _remove_all},
 	{"suspend", "[--noflush] <device>", 0, 1, _suspend},
-	{"resume", "<device>", 0, 1, _resume},
+	{"resume", "<device> [{--addnodeonresume|--addnodeoncreate}]", 0, 1, _resume},
 	{"load", "<device> [<table_file>]", 0, 2, _load},
 	{"clear", "<device>", 0, 1, _clear},
 	{"reload", "<device> [<table_file>]", 0, 2, _load},