[PATCH] support DRIVER as a rule key

Match with a rule against a device with a specific kernel driver.

namedev.c

@@ -626,6 +626,17 @@ static int match_rule(struct config_device *dev, struct sysfs_class_device *clas
 			}
 		}
 
+		/* check for matching driver */
+		if (dev->driver[0] != '\0') {
+			dbg("check for " FIELD_DRIVER " dev->driver='%s' sysfs_device->driver_name='%s'", dev->driver, sysfs_device->driver_name);
+			if (strcmp_pattern(dev->driver, sysfs_device->driver_name) != 0) {
+				dbg(FIELD_DRIVER " is not matching");
+				goto try_parent;
+			} else {
+				dbg(FIELD_DRIVER " matches");
+			}
+		}
+
 		/* check for matching bus id */
 		if (dev->id[0] != '\0') {
 			dbg("check " FIELD_ID);

namedev.h

@@ -28,12 +28,13 @@
 
 struct sysfs_class_device;
 
-#define BUS_SIZE		30
-#define FILE_SIZE		50
-#define VALUE_SIZE		100
-#define ID_SIZE			50
-#define PLACE_SIZE		50
-#define PROGRAM_SIZE		100
+#define BUS_SIZE		32
+#define FILE_SIZE		64
+#define VALUE_SIZE		128
+#define ID_SIZE			64
+#define PLACE_SIZE		64
+#define DRIVER_SIZE		64
+#define PROGRAM_SIZE		128
 
 #define FIELD_BUS		"BUS"
 #define FIELD_SYSFS		"SYSFS"
@@ -43,6 +44,7 @@ struct sysfs_class_device;
 #define FIELD_RESULT		"RESULT"
 #define FIELD_KERNEL		"KERNEL"
 #define FIELD_SUBSYSTEM		"SUBSYSTEM"
+#define FIELD_DRIVER		"DRIVER"
 #define FIELD_NAME		"NAME"
 #define FIELD_SYMLINK		"SYMLINK"
 #define FIELD_OWNER		"OWNER"
@@ -80,6 +82,7 @@ struct config_device {
 	char program[PROGRAM_SIZE];
 	char result[PROGRAM_SIZE];
 	char subsystem[SUBSYSTEM_SIZE];
+	char driver[DRIVER_SIZE];
 	char name[NAME_SIZE];
 	char symlink[NAME_SIZE];
 	struct sysfs_pair sysfs_pair[MAX_SYSFS_PAIRS];

namedev_parse.c

@@ -264,6 +264,12 @@ static int namedev_parse_rules(const char *filename, void *data)
 				continue;
 			}
 
+			if (strcasecmp(temp2, FIELD_DRIVER) == 0) {
+				strfieldcpy(dev.driver, temp3);
+				valid = 1;
+				continue;
+			}
+
 			if (strcasecmp(temp2, FIELD_PROGRAM) == 0) {
 				program_given = 1;
 				strfieldcpy(dev.program, temp3);

test/udev-test.pl

@@ -1113,6 +1113,16 @@ EOF
 BUS="scsi", KERNEL="sda", NAME="should_not_match", SUBSYSTEM="vc"
 BUS="scsi", KERNEL="sda", NAME="node", SUBSYSTEM="block"
 BUS="scsi", KERNEL="sda", NAME="should_not_match2", SUBSYSTEM="vc"
+EOF
+	},
+	{
+		desc		=> "DRIVER test",
+		subsys		=> "block",
+		devpath		=> "/block/sda",
+		exp_name	=> "node",
+		conf		=> <<EOF
+BUS="scsi", KERNEL="sda", NAME="should_not_match", DRIVER="sd-wrong"
+BUS="scsi", KERNEL="sda", NAME="node", DRIVER="sd"
 EOF
 	},
 );

udev.8.in

@@ -172,8 +172,10 @@ Match the bus type of the device.
 Match the kernel device name.
 .TP
 .B SUBSYSTEM
-Match the kernel's subsystem name.
+Match the kernel subsystem name.
 .TP
+.B DRIVER
+Match the kernel driver name.
 .TP
 .B ID
 Match the device number on the bus, like PCI bus id.