[PATCH] add %P modifier to query the node name of the parent device

Events for partition devies may want to read the main block device
name to compose it's own name or read a disklabel from the main device.

SUBSYSTEM="block", KERNEL="*[1-9]", NAME="%P-p%n"
will append the partition number to the name of the main block device.

1 files changed, 31 insertions, 1 deletions

diff --git a/test/udev-test.pl b/test/udev-test.pl
index fa1e4aff..5a519ef1 100644
--- a/test/udev-test.pl
+++ b/test/udev-test.pl
@@ -968,7 +968,7 @@ KERNEL="sda", NAME="cdrom%e"
 EOF
 	},
 	{
-		desc		=> "enumeration char test sequence (1/5 keep)",
+		desc		=> "enumeration char test sequence 1/5 (keep)",
 		subsys		=> "block",
 		devpath		=> "/block/sda",
 		exp_name	=> "cdrom",
@@ -1086,6 +1086,36 @@ EOF
 BUS="scsi", KERNEL="sda", PROGRAM="/bin/echo %p", RESULT="/block/sda" NAME="%k"
 EOF
 	},
+	{
+		desc		=> "parent node name substitution test sequence 1/2 (keep)",
+		subsys		=> "block",
+		devpath		=> "/block/sda",
+		exp_name	=> "main_device",
+		option		=> "keep",
+		conf		=> <<EOF
+BUS="scsi", KERNEL="sda", NAME="main_device"
+EOF
+	},
+	{
+		desc		=> "parent node name substitution test sequence 2/2 (clean)",
+		subsys		=> "block",
+		devpath		=> "/block/sda/sda1",
+		exp_name	=> "main_device-part-1",
+		option		=> "clean",
+		conf		=> <<EOF
+BUS="scsi", KERNEL="sda1", NAME="%P-part-1"
+EOF
+	},
+	{
+		desc		=> "udev_root substitution",
+		subsys		=> "block",
+		devpath		=> "/block/sda/sda1",
+		exp_name	=> "start-udev-root-end",
+		option		=> "clean",
+		conf		=> <<EOF
+BUS="scsi", KERNEL="sda1", NAME="start-%r-end"
+EOF
+	},
 );
 
 # set env