device-mapper-multipath/0206-RHBZ-1239173-pt2-no-paths.patch

---
 libmultipath/configure.c    |    2 -
 libmultipath/devmapper.h    |    6 ++++
 multipath/11-dm-mpath.rules |   61 +++++++++++++++++++++++++++++++++-----------
 3 files changed, 54 insertions(+), 15 deletions(-)

Index: multipath-tools-130222/libmultipath/configure.c
===================================================================
--- multipath-tools-130222.orig/libmultipath/configure.c
+++ multipath-tools-130222/libmultipath/configure.c
@@ -615,7 +615,7 @@ extern int
 domap (struct multipath * mpp, char * params)
 {
 	int r = 0;
-	uint16_t udev_flags = ((mpp->force_udev_reload)? 0 : MPATH_UDEV_RELOAD_FLAG) | ((mpp->skip_kpartx == SKIP_KPARTX_ON)? MPATH_UDEV_NO_KPARTX_FLAG : 0);
+	uint16_t udev_flags = ((mpp->force_udev_reload)? 0 : MPATH_UDEV_RELOAD_FLAG) | ((mpp->skip_kpartx == SKIP_KPARTX_ON)? MPATH_UDEV_NO_KPARTX_FLAG : 0) | ((mpp->nr_active)? 0 : MPATH_UDEV_NO_PATHS_FLAG);
 
 	/*
 	 * last chance to quit before touching the devmaps
Index: multipath-tools-130222/libmultipath/devmapper.h
===================================================================
--- multipath-tools-130222.orig/libmultipath/devmapper.h
+++ multipath-tools-130222/libmultipath/devmapper.h
@@ -18,6 +18,12 @@
 #define MPATH_UDEV_NO_KPARTX_FLAG 0
 #endif
 
+#ifdef DM_SUBSYSTEM_UDEV_FLAG2
+#define MPATH_UDEV_NO_PATHS_FLAG DM_SUBSYSTEM_UDEV_FLAG2
+#else
+#define MPATH_UDEV_NO_PATHS_FLAG 0
+#endif
+
 void dm_init(void);
 int dm_prereq (void);
 int dm_drv_version (unsigned int * version, char * str);
Index: multipath-tools-130222/multipath/11-dm-mpath.rules
===================================================================
--- multipath-tools-130222.orig/multipath/11-dm-mpath.rules
+++ multipath-tools-130222/multipath/11-dm-mpath.rules
@@ -2,33 +2,66 @@ ACTION!="add|change", GOTO="mpath_end"
 ENV{DM_UDEV_RULES_VSN}!="?*", GOTO="mpath_end"
 ENV{DM_UUID}!="mpath-?*", GOTO="mpath_end"
 
+IMPORT{db}="DM_DISABLE_OTHER_RULES_FLAG_OLD"
+IMPORT{db}="MPATH_DEVICE_READY"
+
+# If this uevent didn't come from dm, don't try to update the
+# device state
+ENV{DM_COOKIE}!="?*", ENV{DM_ACTION}!="PATH_*", IMPORT{db}="DM_UDEV_DISABLE_OTHER_RULES_FLAG", IMPORT{db}="DM_NOSCAN", GOTO="scan_import"
+
+ENV{.MPATH_DEVICE_READY_OLD}="$env{MPATH_DEVICE_READY}"
+
+# multipath sets DM_SUBSYSTEM_UDEV_FLAG2 when it reloads a
+# table with no active devices. If this happens, mark the
+# device not ready
+ENV{DM_SUBSYSTEM_UDEV_FLAG2}=="1", ENV{MPATH_DEVICE_READY}="0",\
+	GOTO="mpath_action"
+
+# If the last path has failed mark the device not ready
+ENV{DM_ACTION}=="PATH_FAILED", ENV{DM_NR_VALID_PATHS}=="0",\
+	ENV{MPATH_DEVICE_READY}="0", GOTO="mpath_action"
+
+# Don't mark a device ready on a PATH_FAILED event. even if
+# DM_NR_VALID_PATHS is greater than 0. Just keep the existing
+# value
+ENV{DM_ACTION}=="PATH_FAILED", GOTO="mpath_action"
+
+# This event is either a PATH_REINSTATED or a table reload where
+# there are active paths. Mark the device ready
+ENV{MPATH_DEVICE_READY}=""
+
+LABEL="mpath_action"
+# DM_SUBSYSTEM_UDEV_FLAG0 is the "RELOAD" flag for multipath subsystem.
+# Drop the DM_ACTIVATION flag here as mpath reloads tables if any of its
+# paths are lost/recovered. For any stack above the mpath device, this is not
+# something that should be reacted upon since it would be useless extra work.
+# It's exactly mpath's job to provide *seamless* device access to any of the
+# paths that are available underneath.
+ENV{DM_SUBSYSTEM_UDEV_FLAG0}=="1", ENV{DM_ACTIVATION}="0"
+
 # Do not initiate scanning if no path is available,
 # otherwise there would be a hang or IO error on access.
 # We'd like to avoid this, especially within udev processing.
-ENV{DM_NR_VALID_PATHS}!="?*", IMPORT{db}="DM_NR_VALID_PATHS"
-ENV{DM_NR_VALID_PATHS}=="0", ENV{DM_NOSCAN}="1"
+ENV{MPATH_DEVICE_READY}=="0", ENV{DM_NOSCAN}="1"
 
 # Also skip all foreign rules if no path is available.
 # Remember the original value of DM_DISABLE_OTHER_RULES_FLAG
 # and restore it back once we have at least one path available.
-IMPORT{db}="DM_DISABLE_OTHER_RULES_FLAG_OLD"
-ENV{DM_ACTION}=="PATH_FAILED",\
-	ENV{DM_NR_VALID_PATHS}=="0",\
+ENV{MPATH_DEVICE_READY}=="0", ENV{.MPATH_DEVICE_READY_OLD}!="0",\
 	ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}=="",\
 	ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="$env{DM_UDEV_DISABLE_OTHER_RULES_FLAG}",\
 	ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="1"
-ENV{DM_ACTION}=="PATH_REINSTATED",\
-	ENV{DM_NR_VALID_PATHS}=="1",\
+ENV{MPATH_DEVICE_READY}!="0", ENV{.MPATH_DEVICE_READY_OLD}=="0",\
 	ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="$env{DM_DISABLE_OTHER_RULES_FLAG_OLD}",\
 	ENV{DM_DISABLE_OTHER_RULES_FLAG_OLD}="",\
 	ENV{DM_ACTIVATION}="1"
 
-# DM_SUBSYSTEM_UDEV_FLAG0 is the "RELOAD" flag for multipath subsystem.
-# Drop the DM_ACTIVATION flag here as mpath reloads tables if any of its
-# paths are lost/recovered. For any stack above the mpath device, this is not
-# something that should be reacted upon since it would be useless extra work.
-# It's exactly mpath's job to provide *seamless* device access to any of the
-# paths that are available underneath.
-ENV{DM_SUBSYSTEM_UDEV_FLAG0}=="1", ENV{DM_ACTIVATION}="0"
+LABEL="scan_import"
+ENV{DM_NOSCAN}!="1", GOTO="mpath_end"
+ENV{ID_FS_TYPE}!="?*", IMPORT{db}="ID_FS_TYPE"
+ENV{ID_FS_USAGE}!="?*", IMPORT{db}="ID_FS_USAGE"
+ENV{ID_FS_UUID}!="?*", IMPORT{db}="ID_FS_UUID"
+ENV{ID_FS_ENC}!="?*", IMPORT{db}="ID_FS_UUID_ENC"
+ENV{ID_FS_VERSION}!="?*", IMPORT{db}="ID_FS_VERSION"
 
 LABEL="mpath_end"