[PATCH] Sysfs class support for SCSI tapes

This is a new version of the patch I sent two weeks ago. The code is the
same but now diffed against 2.6.3. Some documentation has been added.
Creation and removal of the st device files has been tested with
udev-018.

The patch adds support for /sys/class/scsi_tape. It also removes the links
to/from the st files in /sys/cdev/major.

A file is created for each mode and rewind/non-rewind device for each
tape drive. Here is an example for one drive:
> ls /sys/class/scsi_tape/
st0m0  st0m0n  st0m1  st0m1n  st0m2  st0m2n  st0m3  st0m3n

In addition to the automatic links (dev, driver), each directory contains
files that export some of the mode parameters:
> ls /sys/class/scsi_tape/st0m0
default_blksize      default_density  dev     driver
default_compression  defined          device

A link is made from the SCSI device directory back to the mode 0
auto-rewind class file:
> ls -l
/sys/devices/pci0000:00/0000:00:1e.0/0000:02:01.1/host1/1:0:5:0/tape
lrwxrwxrwx    1 root     root           39 2004-02-05 23:14
/sys/devices/pci0000:00/0000:00:1e.0/0000:02:01.1/host1/1:0:5:0/tape ->
../../../../../../class/scsi_tape/st0m0

0 files changed, 0 insertions, 0 deletions