bad/driver-sample.sh.patch

From pjones@redhat.com Sat Jun 25 09:19:56 2005
Subject: /sys/block/hda/sample.sh
From: Peter Jones <pjones@redhat.com>
To: gregkh@suse.de
Date: Sat, 25 Jun 2005 11:57:46 -0400
Message-Id: <1119715067.22239.1.camel@localhost.localdomain>

Greg, here's a patch.  I'm thinking maybe the selinux context should be
a config option or a sysctl, but if distros care it's easy to patch it
to the right thing or just replace it at runtime.

From: Peter Jones <pjones@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>


---
 block/genhd.c          |   13 +++++++++++++
 drivers/base/class.c   |   22 ++++++++++++++++++++++
 fs/partitions/check.c  |   14 ++++++++++++++
 include/linux/device.h |    1 +
 4 files changed, 50 insertions(+)

--- gregkh-2.6.orig/block/genhd.c
+++ gregkh-2.6/block/genhd.c
@@ -401,6 +401,14 @@ static ssize_t disk_stats_read(struct ge
 		jiffies_to_msecs(disk_stat_read(disk, io_ticks)),
 		jiffies_to_msecs(disk_stat_read(disk, time_in_queue)));
 }
+static ssize_t disk_sample_read(struct gendisk *disk, char *page)
+{
+	char buf[BDEVNAME_SIZE];
+
+	return sprintf(page, "#!/bin/sh\nmknod /dev/%s b %d %d\n",
+			disk_name(disk, 0, buf),
+			disk->major, disk->first_minor);
+}
 static struct disk_attribute disk_attr_uevent = {
 	.attr = {.name = "uevent", .mode = S_IWUSR },
 	.store	= disk_uevent_store
@@ -425,6 +433,10 @@ static struct disk_attribute disk_attr_s
 	.attr = {.name = "stat", .mode = S_IRUGO },
 	.show	= disk_stats_read
 };
+static struct disk_attribute disk_attr_sample = {
+	.attr = {.name = "sample.sh", .mode = S_IRUSR | S_IXUSR | S_IRUGO },
+	.show	= disk_sample_read
+};
 
 static struct attribute * default_attrs[] = {
 	&disk_attr_uevent.attr,
@@ -433,6 +445,7 @@ static struct attribute * default_attrs[
 	&disk_attr_removable.attr,
 	&disk_attr_size.attr,
 	&disk_attr_stat.attr,
+	&disk_attr_sample.attr,
 	NULL,
 };
 
--- gregkh-2.6.orig/fs/partitions/check.c
+++ gregkh-2.6/fs/partitions/check.c
@@ -249,6 +249,15 @@ static ssize_t part_stat_read(struct hd_
 		       p->ios[0], (unsigned long long)p->sectors[0],
 		       p->ios[1], (unsigned long long)p->sectors[1]);
 }
+static ssize_t part_sample_read(struct hd_struct *p, char *page)
+{
+	struct gendisk *disk = container_of(p->kobj.parent, struct gendisk, kobj);
+	char buf[BDEVNAME_SIZE];
+
+	return sprintf(page, "#!/bin/sh\nmknod /dev/%s b %d %d\n",
+			disk_name(disk, p->partno, buf),
+			disk->major, disk->first_minor + p->partno);
+}
 static struct part_attribute part_attr_uevent = {
 	.attr = {.name = "uevent", .mode = S_IWUSR },
 	.store	= part_uevent_store
@@ -269,6 +278,10 @@ static struct part_attribute part_attr_s
 	.attr = {.name = "stat", .mode = S_IRUGO },
 	.show	= part_stat_read
 };
+static struct part_attribute part_attr_sample = {
+	.attr = {.name = "sample.sh", .mode = S_IRUSR | S_IXUSR | S_IRUGO },
+	.show	= part_sample_read
+};
 
 static struct attribute * default_attrs[] = {
 	&part_attr_uevent.attr,
@@ -276,6 +289,7 @@ static struct attribute * default_attrs[
 	&part_attr_start.attr,
 	&part_attr_size.attr,
 	&part_attr_stat.attr,
+	&part_attr_sample.attr,
 	NULL,
 };
 
--- gregkh-2.6.orig/drivers/base/class.c
+++ gregkh-2.6/drivers/base/class.c
@@ -468,6 +468,13 @@ static ssize_t store_uevent(struct class
 	return count;
 }
 
+static ssize_t show_sample(struct class_device *class_dev, char *buf)
+{
+	return sprintf(buf, "#!/bin/sh\nmknod /dev/%s c %d %d\n",
+			kobject_name(&class_dev->kobj),
+			MAJOR(class_dev->devt), MINOR(class_dev->devt));
+}
+
 void class_device_initialize(struct class_device *class_dev)
 {
 	kobj_set_kset_s(class_dev, class_obj_subsys);
@@ -548,6 +555,21 @@ int class_device_add(struct class_device
 		attr->show = show_dev;
 		class_device_create_file(class_dev, attr);
 		class_dev->devt_attr = attr;
+
+		attr = kzalloc(sizeof(*attr), GFP_KERNEL);
+		if (!attr) {
+			error = -ENOMEM;
+			kobject_del(&class_dev->kobj);
+			goto register_done;
+		}
+
+		attr->attr.name = "sample.sh";
+		attr->attr.mode = S_IRUSR | S_IXUSR | S_IRUGO;
+		attr->attr.owner = parent_class->owner;
+		attr->show = show_sample;
+		attr->store = NULL;
+		class_device_create_file(class_dev, attr);
+		class_dev->sample_attr = attr;
 	}
 
 	class_device_add_attrs(class_dev);
--- gregkh-2.6.orig/include/linux/device.h
+++ gregkh-2.6/include/linux/device.h
@@ -222,6 +222,7 @@ struct class_device {
 	dev_t			devt;		/* dev_t, creates the sysfs "dev" */
 	struct class_device_attribute *devt_attr;
 	struct class_device_attribute uevent_attr;
+	struct class_device_attribute *sample_attr;
 	struct device		* dev;		/* not necessary, but nice to have */
 	void			* class_data;	/* class-specific data */
 	struct class_device	*parent;	/* parent of this child device, if there is one */