[PATCH] switch major/minor to dev_t

namedev.c

@@ -228,12 +228,12 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize,
 			dbg("substitute kernel number '%s'", udev->kernel_number);
 				break;
 		case 'm':
-			strintcatmax(string, udev->minor, maxsize);
-			dbg("substitute minor number '%u'", udev->minor);
+			strintcatmax(string, minor(udev->devt), maxsize);
+			dbg("substitute minor number '%u'", minor(udev->devt));
 			break;
 		case 'M':
-			strintcatmax(string, udev->major, maxsize);
-			dbg("substitute major number '%u'", udev->major);
+			strintcatmax(string, major(udev->devt), maxsize);
+			dbg("substitute major number '%u'", major(udev->devt));
 			break;
 		case 'c':
 			if (strlen(udev->program_result) == 0)
@@ -317,8 +317,9 @@ static void apply_format(struct udevice *udev, char *string, size_t maxsize,
 		case 'N':
 			if (udev->tmp_node[0] == '\0') {
 				dbg("create temporary device node for callout");
-				snprintf(udev->tmp_node, NAME_SIZE-1, "%s/.tmp-%u-%u", udev_root, udev->major, udev->minor);
-				udev_make_node(udev, udev->tmp_node, udev->major, udev->minor, 0600, 0, 0);
+				snprintf(udev->tmp_node, NAME_SIZE, "%s/.tmp-%u-%u", udev_root, major(udev->devt), minor(udev->devt));
+				udev->tmp_node[NAME_SIZE] = '\0';
+				udev_make_node(udev, udev->tmp_node, udev->devt, 0600, 0, 0);
 			}
 			strfieldcatmax(string, udev->tmp_node, maxsize);
 			dbg("substitute temporary device node name '%s'", udev->tmp_node);

udev.h

@@ -58,8 +58,7 @@ struct udevice {
 	char group[USER_SIZE];
 	mode_t mode;
 	char type;
-	int major;
-	int minor;
+	dev_t devt;
 
 	char devname[NAME_SIZE];
 	char tmp_node[NAME_SIZE];
@@ -79,7 +78,7 @@ extern int udev_remove_device(struct udevice *udev);
 extern void udev_init_config(void);
 extern int udev_start(void);
 extern void udev_multiplex_directory(struct udevice *udev, const char *basedir, const char *suffix);
-extern int udev_make_node(struct udevice *udev, const char *file, int major, int minor, mode_t mode, uid_t uid, gid_t gid);
+extern int udev_make_node(struct udevice *udev, const char *file, dev_t devt, mode_t mode, uid_t uid, gid_t gid);
 
 extern char sysfs_path[SYSFS_PATH_MAX];
 extern char udev_root[PATH_MAX];

udev_add.c

@@ -39,35 +39,15 @@
 #include "libsysfs/sysfs/libsysfs.h"
 #include "udev.h"
 #include "udev_utils.h"
+#include "udev_sysfs.h"
 #include "udev_version.h"
 #include "logging.h"
 #include "namedev.h"
 #include "udev_db.h"
 #include "udev_selinux.h"
 
-/*
- * the major/minor of a device is stored in a file called "dev"
- * The number is stored in decimal values in the format: M:m
- */
-static int get_major_minor(struct sysfs_class_device *class_dev, struct udevice *udev)
-{
-	struct sysfs_attribute *attr = NULL;
 
-	attr = sysfs_get_classdev_attr(class_dev, "dev");
-	if (attr == NULL)
-		goto error;
-	dbg("dev='%s'", attr->value);
-
-	if (sscanf(attr->value, "%u:%u", &udev->major, &udev->minor) != 2)
-		goto error;
-	dbg("found major=%d, minor=%d", udev->major, udev->minor);
-
-	return 0;
-error:
-	return -1;
-}
-
-int udev_make_node(struct udevice *udev, const char *file, int major, int minor, mode_t mode, uid_t uid, gid_t gid)
+int udev_make_node(struct udevice *udev, const char *file, dev_t devt, mode_t mode, uid_t uid, gid_t gid)
 {
 	struct stat stats;
 	int retval = 0;
@@ -77,7 +57,7 @@ int udev_make_node(struct udevice *udev, const char *file, int major, int minor,
 
 	/* preserve node with already correct numbers, to not change the inode number */
 	if (((stats.st_mode & S_IFMT) == S_IFBLK || (stats.st_mode & S_IFMT) == S_IFCHR) &&
-	    (stats.st_rdev == makedev(major, minor))) {
+	    (stats.st_rdev == devt)) {
 		dbg("preserve file '%s', cause it has correct dev_t", file);
 		selinux_setfilecon(file, udev->kernel_name, stats.st_mode);
 		goto perms;
@@ -106,10 +86,10 @@ create:
 	}
 
 	selinux_setfscreatecon(file, udev->kernel_name, mode);
-	retval = mknod(file, mode, makedev(major, minor));
+	retval = mknod(file, mode, devt);
 	if (retval != 0) {
 		dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
-		    file, mode, major, minor, strerror(errno));
+		    file, mode, major(devt), minor(devt), strerror(errno));
 		goto exit;
 	}
 
@@ -185,12 +165,12 @@ static int create_node(struct udevice *udev, struct sysfs_class_device *class_de
 
 	if (!udev->test_run) {
 		info("creating device node '%s'", filename);
-		if (udev_make_node(udev, filename, udev->major, udev->minor, udev->mode, uid, gid) != 0)
+		if (udev_make_node(udev, filename, udev->devt, udev->mode, uid, gid) != 0)
 			goto error;
 	} else {
 		info("creating device node '%s', major = '%d', minor = '%d', "
 		     "mode = '%#o', uid = '%d', gid = '%d'", filename,
-		     udev->major, udev->minor, udev->mode, uid, gid);
+		     major(udev->devt), minor(udev->devt), udev->mode, uid, gid);
 	}
 
 	/* create all_partitions if requested */
@@ -208,9 +188,12 @@ static int create_node(struct udevice *udev, struct sysfs_class_device *class_de
 		info("creating device partition nodes '%s[1-%i]'", filename, udev->partitions);
 		if (!udev->test_run) {
 			for (i = 1; i <= udev->partitions; i++) {
+				dev_t part_devt;
+
 				strfieldcpy(partitionname, filename);
 				strintcat(partitionname, i);
-				udev_make_node(udev, partitionname, udev->major, udev->minor + i, udev->mode, uid, gid);
+				part_devt = makedev(major(udev->devt), minor(udev->devt)+1);
+				udev_make_node(udev, partitionname, part_devt, udev->mode, uid, gid);
 			}
 		}
 	}
@@ -295,8 +278,8 @@ int udev_add_device(struct udevice *udev, struct sysfs_class_device *class_dev)
 	int retval = 0;
 
 	if (udev->type == 'b' || udev->type == 'c') {
-		retval = get_major_minor(class_dev, udev);
-		if (retval != 0) {
+		udev->devt = get_devt(class_dev);
+		if (!udev->devt) {
 			dbg("no dev-file found, do nothing");
 			return 0;
 		}

udev_db.c

@@ -79,7 +79,7 @@ int udev_db_add_device(struct udevice *udev)
 	fprintf(f, "P:%s\n", udev->devpath);
 	fprintf(f, "N:%s\n", udev->name);
 	fprintf(f, "S:%s\n", udev->symlink);
-	fprintf(f, "M:%u:%u\n", udev->major, udev->minor);
+	fprintf(f, "M:%u:%u\n", major(udev->devt), minor(udev->devt));
 	fprintf(f, "A:%u\n", udev->partitions);
 	fprintf(f, "R:%u\n", udev->ignore_remove);
 
@@ -92,6 +92,7 @@ static int parse_db_file(struct udevice *udev, const char *filename)
 {
 	char line[NAME_SIZE];
 	char temp[NAME_SIZE];
+	unsigned int major, minor;
 	char *bufline;
 	char *buf;
 	size_t bufsize;
@@ -127,7 +128,8 @@ static int parse_db_file(struct udevice *udev, const char *filename)
 				count = NAME_SIZE-1;
 			strncpy(temp, &bufline[2], count-2);
 			temp[count-2] = '\0';
-			sscanf(temp, "%u:%u", &udev->major, &udev->minor);
+			sscanf(temp, "%u:%u", &major, &minor);
+			udev->devt = makedev(major, minor);
 			break;
 		case 'S':
 			if (count > NAME_SIZE)

udev_remove.c

@@ -85,7 +85,7 @@ static int delete_node(struct udevice *udev)
 	if (stat(filename, &stats) != 0)
 		return -1;
 
-	if (udev->major && stats.st_rdev != makedev(udev->major, udev->minor)) {
+	if (udev->devt && stats.st_rdev != udev->devt) {
 		info("device node '%s' points to a different device, skip removal", filename);
 		return -1;
 	}

udev_sysfs.c

@@ -59,6 +59,23 @@ static const struct subsystem_file {
 	{ NULL, NULL }
 };
 
+dev_t get_devt(struct sysfs_class_device *class_dev)
+{
+	struct sysfs_attribute *attr = NULL;
+	unsigned int major, minor;
+
+	attr = sysfs_get_classdev_attr(class_dev, "dev");
+	if (attr == NULL)
+		return 0;
+	dbg("dev='%s'", attr->value);
+
+	if (sscanf(attr->value, "%u:%u", &major, &minor) != 2)
+		return 0;
+	dbg("found major=%d, minor=%d", major, minor);
+
+	return makedev(major, minor);
+}
+
 int subsystem_expect_no_dev(const char *subsystem)
 {
 	const struct subsystem_file *file;

udev_sysfs.h

@@ -27,6 +27,7 @@
 #define WAIT_MAX_SECONDS		5
 #define WAIT_LOOP_PER_SECOND		20
 
+extern dev_t get_devt(struct sysfs_class_device *class_dev);
 extern int subsystem_expect_no_dev(const char *subsystem);
 
 /* /sys/class /sys/block devices */