openwrt-xburst/target/linux/generic-2.6/patches/000-reenable_devfs.patch

diff -ur linux-2.6.15-rc5/drivers/mtd/mtd_blkdevs.c linux-2.6.15-rc5-openwrt/drivers/mtd/mtd_blkdevs.c
--- linux-2.6.15-rc5/drivers/mtd/mtd_blkdevs.c	2005-12-04 06:10:42.000000000 +0100
+++ linux-2.6.15-rc5-openwrt/drivers/mtd/mtd_blkdevs.c	2005-12-15 07:53:20.000000000 +0100
@@ -21,6 +21,9 @@
 #include <linux/init.h>
 #include <asm/semaphore.h>
 #include <asm/uaccess.h>
+#ifdef CONFIG_DEVFS_FS
+#include <linux/devfs_fs_kernel.h>
+#endif
 
 static LIST_HEAD(blktrans_majors);
 
@@ -302,6 +305,11 @@
 		snprintf(gd->disk_name, sizeof(gd->disk_name),
 			 "%s%d", tr->name, new->devnum);
 
+#ifdef CONFIG_DEVFS_FS
+		snprintf(gd->devfs_name, sizeof(gd->devfs_name),
+			 "%s/%c", tr->name, (tr->part_bits?'a':'0') + new->devnum);
+#endif
+
 	/* 2.5 has capacity in units of 512 bytes while still
 	   having BLOCK_SIZE_BITS set to 10. Just to keep us amused. */
 	set_capacity(gd, (new->size * new->blksize) >> 9);
@@ -418,6 +426,10 @@
 		return ret;
 	}
 
+#ifdef CONFIG_DEVFS_FS
+	devfs_mk_dir(tr->name);
+#endif
+
 	INIT_LIST_HEAD(&tr->devs);
 	list_add(&tr->list, &blktrans_majors);
 
@@ -450,6 +462,10 @@
 		tr->remove_dev(dev);
 	}
 
+#ifdef CONFIG_DEVFS_FS
+	devfs_remove(tr->name);
+#endif
+
 	blk_cleanup_queue(tr->blkcore_priv->rq);
 	unregister_blkdev(tr->major, tr->name);
 
diff -ur linux-2.6.15-rc5/drivers/mtd/mtdchar.c linux-2.6.15-rc5-openwrt/drivers/mtd/mtdchar.c
--- linux-2.6.15-rc5/drivers/mtd/mtdchar.c	2005-12-04 06:10:42.000000000 +0100
+++ linux-2.6.15-rc5-openwrt/drivers/mtd/mtdchar.c	2005-12-15 07:49:15.000000000 +0100
@@ -19,19 +18,33 @@
 
 #include <asm/uaccess.h>
 
+#ifdef CONFIG_DEVFS_FS
+#include <linux/devfs_fs_kernel.h>
+#else
+#include <linux/device.h>
+
 static struct class *mtd_class;
+#endif
 
 static void mtd_notify_add(struct mtd_info* mtd)
 {
 	if (!mtd)
 		return;
 
+#ifdef CONFIG_DEVFS_FS
+	devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2),
+			S_IFCHR | S_IRUGO | S_IWUGO, "mtd/%d", mtd->index);
+
+	devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1),
+			S_IFCHR | S_IRUGO, "mtd/%dro", mtd->index);
+#else
 	class_device_create(mtd_class, NULL, MKDEV(MTD_CHAR_MAJOR, mtd->index*2),
 			    NULL, "mtd%d", mtd->index);
 
 	class_device_create(mtd_class, NULL,
 			    MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1),
 			    NULL, "mtd%dro", mtd->index);
+#endif
 }
 
 static void mtd_notify_remove(struct mtd_info* mtd)
@@ -39,8 +52,13 @@
 	if (!mtd)
 		return;
 
+#ifdef CONFIG_DEVFS_FS
+	devfs_remove("mtd/%d", mtd->index);
+	devfs_remove("mtd/%dro", mtd->index);
+#else
 	class_device_destroy(mtd_class, MKDEV(MTD_CHAR_MAJOR, mtd->index*2));
 	class_device_destroy(mtd_class, MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1));
+#endif
 }
 
 static struct mtd_notifier notifier = {
@@ -48,6 +66,22 @@
 	.remove	= mtd_notify_remove,
 };
 
+#ifdef CONFIG_DEVFS_FS
+	static inline void mtdchar_devfs_init(void)
+	{
+		devfs_mk_dir("mtd");
+		register_mtd_user(&notifier);
+	}
+	static inline void mtdchar_devfs_exit(void)
+	{
+		unregister_mtd_user(&notifier);
+		devfs_remove("mtd");
+	}
+	#else /* !DEVFS */
+	#define mtdchar_devfs_init() do { } while(0)
+	#define mtdchar_devfs_exit() do { } while(0)
+#endif
+
 /*
  * We use file->private_data to store a pointer to the MTDdevice.
  * Since alighment is at least 32 bits, we have 2 bits free for OTP
@@ -643,6 +677,9 @@
 		return -EAGAIN;
 	}
 
+#ifdef CONFIG_DEVFS_FS
+	mtdchar_devfs_init();
+#else
 	mtd_class = class_create(THIS_MODULE, "mtd");
 
 	if (IS_ERR(mtd_class)) {
@@ -652,13 +689,19 @@
 	}
 
 	register_mtd_user(&notifier);
+#endif
 	return 0;
 }
 
 static void __exit cleanup_mtdchar(void)
 {
+
+#ifdef CONFIG_DEVFS_FS
+	mtdchar_devfs_exit();
+#else
 	unregister_mtd_user(&notifier);
 	class_destroy(mtd_class);
+#endif
 	unregister_chrdev(MTD_CHAR_MAJOR, "mtd");
 }
 
diff -ur linux-2.6.15-rc5/fs/Kconfig linux-2.6.15-rc5-openwrt/fs/Kconfig
--- linux-2.6.15-rc5/fs/Kconfig	2005-12-04 06:10:42.000000000 +0100
+++ linux-2.6.15-rc5-openwrt/fs/Kconfig	2005-12-15 07:44:01.000000000 +0100
@@ -772,6 +772,56 @@
         help
         Exports the dump image of crashed kernel in ELF format.
 
+config DEVFS_FS
+	bool "/dev file system support (OBSOLETE)"
+	depends on EXPERIMENTAL
+	help
+	  This is support for devfs, a virtual file system (like /proc) which
+	  provides the file system interface to device drivers, normally found
+	  in /dev. Devfs does not depend on major and minor number
+	  allocations. Device drivers register entries in /dev which then
+	  appear automatically, which means that the system administrator does
+	  not have to create character and block special device files in the
+	  /dev directory using the mknod command (or MAKEDEV script) anymore.
+
+	  This is work in progress. If you want to use this, you *must* read
+	  the material in <file:Documentation/filesystems/devfs/>, especially
+	  the file README there.
+
+	  Note that devfs no longer manages /dev/pts!  If you are using UNIX98
+	  ptys, you will also need to mount the /dev/pts filesystem (devpts).
+
+	  Note that devfs has been obsoleted by udev,
+	  <http://www.kernel.org/pub/linux/utils/kernel/hotplug/>.
+	  It has been stripped down to a bare minimum and is only provided for
+	  legacy installations that use its naming scheme which is
+	  unfortunately different from the names normal Linux installations
+	  use.
+
+	  If unsure, say N.
+
+config DEVFS_MOUNT
+	bool "Automatically mount at boot"
+	depends on DEVFS_FS
+	help
+	  This option appears if you have CONFIG_DEVFS_FS enabled. Setting
+	  this to 'Y' will make the kernel automatically mount devfs onto /dev
+	  when the system is booted, before the init thread is started.
+	  You can override this with the "devfs=nomount" boot option.
+
+	  If unsure, say N.
+
+config DEVFS_DEBUG
+	bool "Debug devfs"
+	depends on DEVFS_FS
+	help
+	  If you say Y here, then the /dev file system code will generate
+	  debugging messages. See the file
+	  <file:Documentation/filesystems/devfs/boot-options> for more
+	  details.
+
+	  If unsure, say N.
+
 config SYSFS
 	bool "sysfs file system support" if EMBEDDED
 	default y
diff -ur linux-2.6.17/drivers/ieee1394/dv1394.c linux-2.6.17-devfs/drivers/ieee1394/dv1394.c
--- linux-2.6.17/drivers/ieee1394/dv1394.c	2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-devfs/drivers/ieee1394/dv1394.c	2006-08-25 11:06:18.000000000 -0700
@@ -73,7 +73,7 @@
   - fix all XXX showstoppers
   - disable IR/IT DMA interrupts on shutdown
   - flush pci writes to the card by issuing a read
-  - character device dispatching
+  - devfs and character device dispatching (* needs testing with Linux 2.2.x)
   - switch over to the new kernel DMA API (pci_map_*()) (* needs testing on platforms with IOMMU!)
   - keep all video_cards in a list (for open() via chardev), set file->private_data = video
   - dv1394_poll should indicate POLLIN when receiving buffers are available
@@ -1096,6 +1096,7 @@
 
 	init.api_version = DV1394_API_VERSION;
 	init.n_frames = DV1394_MAX_FRAMES / 4;
+	/* the following are now set via devfs */
 	init.channel = video->channel;
 	init.format = video->pal_or_ntsc;
 	init.cip_n = video->cip_n;
@@ -1790,6 +1791,8 @@
 {
 	struct video_card *video = NULL;
 
+	/* if the device was opened through devfs, then file->private_data
+	   has already been set to video by devfs */
 	if (file->private_data) {
 		video = (struct video_card*) file->private_data;
 
@@ -2208,7 +2211,7 @@
 	video = kzalloc(sizeof(*video), GFP_KERNEL);
 	if (!video) {
 		printk(KERN_ERR "dv1394: cannot allocate video_card\n");
-		return -1;
+		goto err;
 	}
 
 	video->ohci = ohci;
@@ -2263,14 +2266,37 @@
 	list_add_tail(&video->list, &dv1394_cards);
 	spin_unlock_irqrestore(&dv1394_cards_lock, flags);
 
+	if (devfs_mk_cdev(MKDEV(IEEE1394_MAJOR,
+				IEEE1394_MINOR_BLOCK_DV1394*16 + video->id),
+			S_IFCHR|S_IRUGO|S_IWUGO,
+			 "ieee1394/dv/host%d/%s/%s",
+			 (video->id>>2),
+			 (video->pal_or_ntsc == DV1394_NTSC ? "NTSC" : "PAL"),
+			 (video->mode == MODE_RECEIVE ? "in" : "out")) < 0)
+			goto err_free;
+
 	debug_printk("dv1394: dv1394_init() OK on ID %d\n", video->id);
+
 	return 0;
+
+ err_free:
+	kfree(video);
+ err:
+	return -1;
 }
 
 static void dv1394_un_init(struct video_card *video)
 {
+	char buf[32];
+
 	/* obviously nobody has the driver open at this point */
 	do_dv1394_shutdown(video, 1);
+	snprintf(buf, sizeof(buf), "dv/host%d/%s/%s", (video->id >> 2),
+		(video->pal_or_ntsc == DV1394_NTSC ? "NTSC" : "PAL"),
+		(video->mode == MODE_RECEIVE ? "in" : "out")
+		);
+
+	devfs_remove("ieee1394/%s", buf);
 	kfree(video);
 }
 
@@ -2307,6 +2333,9 @@
 
 	class_device_destroy(hpsb_protocol_class,
 		MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_DV1394 * 16 + (id<<2)));
+	devfs_remove("ieee1394/dv/host%d/NTSC", id);
+	devfs_remove("ieee1394/dv/host%d/PAL", id);
+	devfs_remove("ieee1394/dv/host%d", id);
 }
 
 static void dv1394_add_host (struct hpsb_host *host)
@@ -2323,6 +2352,9 @@
 	class_device_create(hpsb_protocol_class, NULL, MKDEV(
 		IEEE1394_MAJOR,	IEEE1394_MINOR_BLOCK_DV1394 * 16 + (id<<2)), 
 		NULL, "dv1394-%d", id);
+	devfs_mk_dir("ieee1394/dv/host%d", id);
+	devfs_mk_dir("ieee1394/dv/host%d/NTSC", id);
+	devfs_mk_dir("ieee1394/dv/host%d/PAL", id);
 
 	dv1394_init(ohci, DV1394_NTSC, MODE_RECEIVE);
 	dv1394_init(ohci, DV1394_NTSC, MODE_TRANSMIT);
@@ -2579,8 +2611,10 @@
 static void __exit dv1394_exit_module(void)
 {
 	hpsb_unregister_protocol(&dv1394_driver);
+
 	hpsb_unregister_highlevel(&dv1394_highlevel);
 	cdev_del(&dv1394_cdev);
+	devfs_remove("ieee1394/dv");
 }
 
 static int __init dv1394_init_module(void)
@@ -2596,12 +2630,15 @@
 		return ret;
 	}
 
+	devfs_mk_dir("ieee1394/dv");
+
 	hpsb_register_highlevel(&dv1394_highlevel);
 
 	ret = hpsb_register_protocol(&dv1394_driver);
 	if (ret) {
 		printk(KERN_ERR "dv1394: failed to register protocol\n");
 		hpsb_unregister_highlevel(&dv1394_highlevel);
+		devfs_remove("ieee1394/dv");
 		cdev_del(&dv1394_cdev);
 		return ret;
 	}
diff -ur linux-2.6.17/drivers/ieee1394/ieee1394_core.c linux-2.6.17-devfs/drivers/ieee1394/ieee1394_core.c
--- linux-2.6.17/drivers/ieee1394/ieee1394_core.c	2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-devfs/drivers/ieee1394/ieee1394_core.c	2006-08-25 11:06:18.000000000 -0700
@@ -1078,10 +1078,17 @@
 		goto exit_release_kernel_thread;
 	}
 
+	/* actually this is a non-fatal error */
+	ret = devfs_mk_dir("ieee1394");
+	if (ret < 0) {
+		HPSB_ERR("unable to make devfs dir for device major %d!\n", IEEE1394_MAJOR);
+		goto release_chrdev;
+	}
+
 	ret = bus_register(&ieee1394_bus_type);
 	if (ret < 0) {
 		HPSB_INFO("bus register failed");
-		goto release_chrdev;
+		goto release_devfs;
 	}
 
 	for (i = 0; fw_bus_attrs[i]; i++) {
@@ -1092,7 +1099,7 @@
 						fw_bus_attrs[i--]);
 			}
 			bus_unregister(&ieee1394_bus_type);
-			goto release_chrdev;
+			goto release_devfs;
 		}
 	}
 
@@ -1145,6 +1152,8 @@
 	for (i = 0; fw_bus_attrs[i]; i++)
 		bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]);
 	bus_unregister(&ieee1394_bus_type);
+release_devfs:
+	devfs_remove("ieee1394");
 release_chrdev:
 	unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
 exit_release_kernel_thread:
@@ -1182,6 +1191,7 @@
 	hpsb_cleanup_config_roms();
 
 	unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
+	devfs_remove("ieee1394");
 }
 
 module_init(ieee1394_init);
diff -ur linux-2.6.17/drivers/ieee1394/ieee1394_core.h linux-2.6.17-devfs/drivers/ieee1394/ieee1394_core.h
--- linux-2.6.17/drivers/ieee1394/ieee1394_core.h	2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-devfs/drivers/ieee1394/ieee1394_core.h	2006-08-25 11:06:18.000000000 -0700
@@ -3,6 +3,7 @@
 #define _IEEE1394_CORE_H
 
 #include <linux/slab.h>
+#include <linux/devfs_fs_kernel.h>
 #include <asm/atomic.h>
 #include <asm/semaphore.h>
 #include "hosts.h"
diff -ur linux-2.6.17/drivers/ieee1394/raw1394.c linux-2.6.17-devfs/drivers/ieee1394/raw1394.c
--- linux-2.6.17/drivers/ieee1394/raw1394.c	2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-devfs/drivers/ieee1394/raw1394.c	2006-08-25 11:06:18.000000000 -0700
@@ -41,6 +41,7 @@
 #include <linux/cdev.h>
 #include <asm/uaccess.h>
 #include <asm/atomic.h>
+#include <linux/devfs_fs_kernel.h>
 #include <linux/compat.h>
 
 #include "csr1212.h"
@@ -2998,6 +2999,9 @@
 		goto out_unreg;
 	}
 
+	devfs_mk_cdev(MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_RAW1394 * 16),
+		      S_IFCHR | S_IRUSR | S_IWUSR, RAW1394_DEVICE_NAME);
+
 	cdev_init(&raw1394_cdev, &raw1394_fops);
 	raw1394_cdev.owner = THIS_MODULE;
 	kobject_set_name(&raw1394_cdev.kobj, RAW1394_DEVICE_NAME);
@@ -3019,6 +3023,7 @@
 	goto out;
 
       out_dev:
+	devfs_remove(RAW1394_DEVICE_NAME);
 	class_device_destroy(hpsb_protocol_class,
 			     MKDEV(IEEE1394_MAJOR,
 				   IEEE1394_MINOR_BLOCK_RAW1394 * 16));
@@ -3034,6 +3039,7 @@
 			     MKDEV(IEEE1394_MAJOR,
 				   IEEE1394_MINOR_BLOCK_RAW1394 * 16));
 	cdev_del(&raw1394_cdev);
+	devfs_remove(RAW1394_DEVICE_NAME);
 	hpsb_unregister_highlevel(&raw1394_highlevel);
 	hpsb_unregister_protocol(&raw1394_driver);
 }
diff -ur linux-2.6.17/drivers/ieee1394/video1394.c linux-2.6.17-devfs/drivers/ieee1394/video1394.c
--- linux-2.6.17/drivers/ieee1394/video1394.c	2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-devfs/drivers/ieee1394/video1394.c	2006-08-25 11:06:18.000000000 -0700
@@ -42,6 +42,7 @@
 #include <linux/poll.h>
 #include <linux/smp_lock.h>
 #include <linux/delay.h>
+#include <linux/devfs_fs_kernel.h>
 #include <linux/bitops.h>
 #include <linux/types.h>
 #include <linux/vmalloc.h>
@@ -1321,6 +1322,9 @@
 	class_device_create(hpsb_protocol_class, NULL, MKDEV(
 		IEEE1394_MAJOR,	minor), 
 		NULL, "%s-%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
+	devfs_mk_cdev(MKDEV(IEEE1394_MAJOR, minor),
+		       S_IFCHR | S_IRUSR | S_IWUSR,
+		       "%s/%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
 }
 
 
@@ -1328,9 +1332,12 @@
 {
 	struct ti_ohci *ohci = hpsb_get_hostinfo(&video1394_highlevel, host);
 
-	if (ohci)
+	if (ohci) {
 		class_device_destroy(hpsb_protocol_class, MKDEV(IEEE1394_MAJOR,
 			IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + ohci->host->id));
+		devfs_remove("%s/%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
+	}
+	
 	return;
 }
 
@@ -1471,8 +1478,12 @@
 static void __exit video1394_exit_module (void)
 {
 	hpsb_unregister_protocol(&video1394_driver);
+
 	hpsb_unregister_highlevel(&video1394_highlevel);
+
+	devfs_remove(VIDEO1394_DRIVER_NAME);
 	cdev_del(&video1394_cdev);
+
 	PRINT_G(KERN_INFO, "Removed " VIDEO1394_DRIVER_NAME " module");
 }
 
@@ -1489,12 +1500,15 @@
 		return ret;
         }
 
+	devfs_mk_dir(VIDEO1394_DRIVER_NAME);
+
 	hpsb_register_highlevel(&video1394_highlevel);
 
 	ret = hpsb_register_protocol(&video1394_driver);
 	if (ret) {
 		PRINT_G(KERN_ERR, "video1394: failed to register protocol");
 		hpsb_unregister_highlevel(&video1394_highlevel);
+		devfs_remove(VIDEO1394_DRIVER_NAME);
 		cdev_del(&video1394_cdev);
 		return ret;
 	}
diff -ur linux-2.6.17/drivers/scsi/osst.c linux-2.6.17-devfs/drivers/scsi/osst.c
--- linux-2.6.17/drivers/scsi/osst.c	2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-devfs/drivers/scsi/osst.c	2006-08-25 11:06:18.000000000 -0700
@@ -48,6 +48,7 @@
 #include <linux/vmalloc.h>
 #include <linux/blkdev.h>
 #include <linux/moduleparam.h>
+#include <linux/devfs_fs_kernel.h>
 #include <linux/delay.h>
 #include <linux/jiffies.h>
 #include <asm/uaccess.h>
@@ -5721,7 +5722,7 @@
 	struct st_partstat * STps;
 	struct osst_buffer * buffer;
 	struct gendisk	   * drive;
-	int		     i, dev_num;
+	int		     i, mode, dev_num;
 
 	if (SDp->type != TYPE_TAPE || !osst_supports(SDp))
 		return -ENODEV;
@@ -5857,6 +5858,18 @@
 		snprintf(name, 8, "%s%s", "n", tape_name(tpnt));
 		osst_sysfs_add(MKDEV(OSST_MAJOR, dev_num + 128), dev, tpnt, name);
 	}
+	for (mode = 0; mode < ST_NBR_MODES; ++mode) {
+		/*  Rewind entry  */
+		devfs_mk_cdev(MKDEV(OSST_MAJOR, dev_num + (mode << 5)),
+				S_IFCHR | S_IRUGO | S_IWUGO,
+				"%s/ot%s", SDp->devfs_name, osst_formats[mode]);
+
+		/*  No-rewind entry  */
+		devfs_mk_cdev(MKDEV(OSST_MAJOR, dev_num + (mode << 5) + 128),
+				S_IFCHR | S_IRUGO | S_IWUGO,
+				"%s/ot%sn", SDp->devfs_name, osst_formats[mode]);
+	}
+	drive->number = devfs_register_tape(SDp->devfs_name);
 
 	sdev_printk(KERN_INFO, SDp,
 		"osst :I: Attached OnStream %.5s tape as %s\n",
@@ -5873,7 +5886,7 @@
 {
 	struct scsi_device * SDp = to_scsi_device(dev);
 	struct osst_tape * tpnt;
-	int i;
+	int i, mode;
 
 	if ((SDp->type != TYPE_TAPE) || (osst_nr_dev <= 0))
 		return 0;
@@ -5884,6 +5897,11 @@
 			osst_sysfs_destroy(MKDEV(OSST_MAJOR, i));
 			osst_sysfs_destroy(MKDEV(OSST_MAJOR, i+128));
 			tpnt->device = NULL;
+			for (mode = 0; mode < ST_NBR_MODES; ++mode) {
+				devfs_remove("%s/ot%s", SDp->devfs_name, osst_formats[mode]);
+				devfs_remove("%s/ot%sn", SDp->devfs_name, osst_formats[mode]);
+			}
+			devfs_unregister_tape(tpnt->drive->number);
 			put_disk(tpnt->drive);
 			os_scsi_tapes[i] = NULL;
 			osst_nr_dev--;
diff -ur linux-2.6.17/drivers/scsi/scsi.c linux-2.6.17-devfs/drivers/scsi/scsi.c
--- linux-2.6.17/drivers/scsi/scsi.c	2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-devfs/drivers/scsi/scsi.c	2006-08-25 11:07:42.000000000 -0700
@@ -48,6 +48,7 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/completion.h>
+#include <linux/devfs_fs_kernel.h>
 #include <linux/unistd.h>
 #include <linux/spinlock.h>
 #include <linux/kmod.h>
@@ -1247,6 +1248,7 @@
 	for_each_possible_cpu(i)
 		INIT_LIST_HEAD(&per_cpu(scsi_done_q, i));
 
+	devfs_mk_dir("scsi");
 	printk(KERN_NOTICE "SCSI subsystem initialized\n");
 	return 0;
 
@@ -1271,6 +1273,7 @@
 	scsi_exit_sysctl();
 	scsi_exit_hosts();
 	scsi_exit_devinfo();
+	devfs_remove("scsi");
 	scsi_exit_procfs();
 	scsi_exit_queue();
 }
diff -ur linux-2.6.17/drivers/scsi/scsi_scan.c linux-2.6.17-devfs/drivers/scsi/scsi_scan.c
--- linux-2.6.17/drivers/scsi/scsi_scan.c	2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-devfs/drivers/scsi/scsi_scan.c	2006-08-25 11:06:18.000000000 -0700
@@ -716,8 +716,12 @@
 	if (inq_result[7] & 0x10)
 		sdev->sdtr = 1;
 
+	sprintf(sdev->devfs_name, "scsi/host%d/bus%d/target%d/lun%d",
+				sdev->host->host_no, sdev->channel,
+				sdev->id, sdev->lun);
+
 	/*
-	 * End sysfs code.
+	 * End driverfs/devfs code.
 	 */
 
 	if ((sdev->scsi_level >= SCSI_2) && (inq_result[7] & 2) &&
diff -ur linux-2.6.17/drivers/scsi/sd.c linux-2.6.17-devfs/drivers/scsi/sd.c
--- linux-2.6.17/drivers/scsi/sd.c	2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-devfs/drivers/scsi/sd.c	2006-08-25 11:06:18.000000000 -0700
@@ -1683,6 +1683,8 @@
 			'a' + m1, 'a' + m2, 'a' + m3);
 	}
 
+	strcpy(gd->devfs_name, sdp->devfs_name);
+
 	gd->private_data = &sdkp->driver;
 	gd->queue = sdkp->device->request_queue;
 
diff -ur linux-2.6.17/drivers/scsi/sg.c linux-2.6.17-devfs/drivers/scsi/sg.c
--- linux-2.6.17/drivers/scsi/sg.c	2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-devfs/drivers/scsi/sg.c	2006-08-25 11:06:18.000000000 -0700
@@ -44,6 +44,7 @@
 #include <linux/poll.h>
 #include <linux/smp_lock.h>
 #include <linux/moduleparam.h>
+#include <linux/devfs_fs_kernel.h>
 #include <linux/cdev.h>
 #include <linux/seq_file.h>
 #include <linux/blkdev.h>
@@ -1427,10 +1428,14 @@
 	k = error;
 	sdp = sg_dev_arr[k];
 
+	devfs_mk_cdev(MKDEV(SCSI_GENERIC_MAJOR, k),
+			S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP,
+			"%s/generic", scsidp->devfs_name);
 	error = cdev_add(cdev, MKDEV(SCSI_GENERIC_MAJOR, k), 1);
-	if (error)
+	if (error) {
+		devfs_remove("%s/generic", scsidp->devfs_name);
 		goto out;
-
+	}
 	sdp->cdev = cdev;
 	if (sg_sysfs_valid) {
 		struct class_device * sg_class_member;
@@ -1520,6 +1525,7 @@
 		class_device_destroy(sg_sysfs_class, MKDEV(SCSI_GENERIC_MAJOR, k));
 		cdev_del(sdp->cdev);
 		sdp->cdev = NULL;
+		devfs_remove("%s/generic", scsidp->devfs_name);
 		put_disk(sdp->disk);
 		sdp->disk = NULL;
 		if (NULL == sdp->headfp)
diff -ur linux-2.6.17/drivers/scsi/sr.c linux-2.6.17-devfs/drivers/scsi/sr.c
--- linux-2.6.17/drivers/scsi/sr.c	2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-devfs/drivers/scsi/sr.c	2006-08-25 11:06:18.000000000 -0700
@@ -592,6 +592,8 @@
 	get_capabilities(cd);
 	sr_vendor_init(cd);
 
+	snprintf(disk->devfs_name, sizeof(disk->devfs_name),
+			"%s/cd", sdev->devfs_name);
 	disk->driverfs_dev = &sdev->sdev_gendev;
 	set_capacity(disk, cd->capacity);
 	disk->private_data = &cd->driver;
diff -ur linux-2.6.17/drivers/scsi/st.c linux-2.6.17-devfs/drivers/scsi/st.c
--- linux-2.6.17/drivers/scsi/st.c	2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-devfs/drivers/scsi/st.c	2006-08-25 11:06:18.000000000 -0700
@@ -35,6 +35,7 @@
 #include <linux/spinlock.h>
 #include <linux/blkdev.h>
 #include <linux/moduleparam.h>
+#include <linux/devfs_fs_kernel.h>
 #include <linux/cdev.h>
 #include <linux/delay.h>
 #include <linux/mutex.h>
@@ -4053,8 +4054,23 @@
 		do_create_class_files(tpnt, dev_num, mode);
 	}
 
+	for (mode = 0; mode < ST_NBR_MODES; ++mode) {
+		/* Make sure that the minor numbers corresponding to the four
+		   first modes always get the same names */
+		i = mode << (4 - ST_NBR_MODE_BITS);
+		/*  Rewind entry  */
+		devfs_mk_cdev(MKDEV(SCSI_TAPE_MAJOR, TAPE_MINOR(dev_num, mode, 0)),
+			      S_IFCHR | S_IRUGO | S_IWUGO,
+			      "%s/mt%s", SDp->devfs_name, st_formats[i]);
+		/*  No-rewind entry  */
+		devfs_mk_cdev(MKDEV(SCSI_TAPE_MAJOR, TAPE_MINOR(dev_num, mode, 1)),
+			      S_IFCHR | S_IRUGO | S_IWUGO,
+			      "%s/mt%sn", SDp->devfs_name, st_formats[i]);
+	}
+	disk->number = devfs_register_tape(SDp->devfs_name);
+
 	sdev_printk(KERN_WARNING, SDp,
		    "Attached scsi tape %s\n", tape_name(tpnt));
 	printk(KERN_WARNING "%s: try direct i/o: %s (alignment %d B)\n",
 	       tape_name(tpnt), tpnt->try_dio ? "yes" : "no",
 	       queue_dma_alignment(SDp->request_queue) + 1);
@@ -4106,9 +4122,13 @@
 			scsi_tapes[i] = NULL;
 			st_nr_dev--;
 			write_unlock(&st_dev_arr_lock);
+			devfs_unregister_tape(tpnt->disk->number);
 			sysfs_remove_link(&tpnt->device->sdev_gendev.kobj,
 					  "tape");
 			for (mode = 0; mode < ST_NBR_MODES; ++mode) {
+				j = mode << (4 - ST_NBR_MODE_BITS);
+				devfs_remove("%s/mt%s", SDp->devfs_name, st_formats[j]);
+				devfs_remove("%s/mt%sn", SDp->devfs_name, st_formats[j]);
 				for (j=0; j < 2; j++) {
 					class_device_destroy(st_sysfs_class,
 							     MKDEV(SCSI_TAPE_MAJOR,
diff -ur linux-2.6.17/include/scsi/scsi_device.h linux-2.6.17-devfs/include/scsi/scsi_device.h
--- linux-2.6.17/include/scsi/scsi_device.h	2006-06-17 18:49:35.000000000 -0700
+++ linux-2.6.17-devfs/include/scsi/scsi_device.h	2006-08-25 11:06:18.000000000 -0700
@@ -74,6 +74,7 @@
 	unsigned sector_size;	/* size in bytes */
 
 	void *hostdata;		/* available to low-level driver */
+	char devfs_name[256];	/* devfs junk */
 	char type;
 	char scsi_level;
 	char inq_periph_qual;	/* PQ from INQUIRY data */