[dm-devel] [PATCH] kpartx: partitions of mapped devices cannot be created in redhat OS

[tang.junhui at zte.com.cn]

From: "tang.junhui" <tang.junhui at zte.com.cn>

Environment variables such as DM_TABLE_STATE are used in kpartx.rules which exported
by "dmsetup export" in previous udev rules in SuSE OS, however, there is no such command
"dmsetup export" in redhat OS, so these environment variables are not initialized and
 partitions cannot be created. This patch replace "dmsetup export" with "dmsetup info"
 to get the status of mapped device, which can work well both in SuSE and redhat OS.

Signed-off-by: tang.junhui <tang.junhui at zte.com.cn>
---
 kpartx/kpartx.rules | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/kpartx/kpartx.rules b/kpartx/kpartx.rules
index 1713f3c..8c8b836 100644
--- a/kpartx/kpartx.rules
+++ b/kpartx/kpartx.rules
@@ -7,8 +7,12 @@
 KERNEL!="dm-*", GOTO="kpartx_end"
 ACTION=="remove", GOTO="kpartx_end"
 
-ENV{DM_TABLE_STATE}!="LIVE", GOTO="kpartx_end"
-ENV{DM_DEPS}=="0", GOTO="kpartx_end"
+ENV{DMSETUP_SBIN_PATH}="/sbin"
+TEST!="$env{DMSETUP_SBIN_PATH}/dmsetup", ENV{DMSETUP_SBIN_PATH}="/usr/sbin"
+IMPORT{program}="$env{DMSETUP_SBIN_PATH}/dmsetup info -j %M -m %m -c --nameprefixes --noheadings --rows -o tables_loaded,device_count"
+
+ENV{DM_TABLES_LOADED}!="Live", GOTO="kpartx_end"
+ENV{DM_DEVICE_COUNT}=="0", GOTO="kpartx_end"
 
 ENV{DM_UUID}=="?*", IMPORT{program}=="kpartx_id %M %m $env{DM_UUID}"
 
@@ -37,7 +41,7 @@ ENV{ID_FS_USAGE}=="filesystem|other", ENV{ID_FS_LABEL_ENC}=="?*", \
 # Create dm tables for partitions
 ENV{DM_ACTION}=="PATH_FAILED|PATH_REINSTATED", GOTO="kpartx_end"
 ENV{DM_NR_VALID_PATHS}=="0", GOTO="kpartx_end"
-ENV{DM_STATE}!="SUSPENDED", ENV{DM_UUID}=="mpath-*", \
+ENV{DM_SUSPENDED}!="Suspended", ENV{DM_UUID}=="mpath-*", \
 	RUN+="/sbin/kpartx -u -p -part /dev/$name"
 
 LABEL="kpartx_end"
-- 
2.8.1.windows.1