mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 20:00:53 +07:00
a81792f668
Also includes a few Kconfig files (xtensa, blackfin) Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: linux-doc@vger.kernel.org Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Randy Dunlap <rdunlap@xenotime.net>
58 lines
2.1 KiB
Plaintext
58 lines
2.1 KiB
Plaintext
BFS FILESYSTEM FOR LINUX
|
|
========================
|
|
|
|
The BFS filesystem is used by SCO UnixWare OS for the /stand slice, which
|
|
usually contains the kernel image and a few other files required for the
|
|
boot process.
|
|
|
|
In order to access /stand partition under Linux you obviously need to
|
|
know the partition number and the kernel must support UnixWare disk slices
|
|
(CONFIG_UNIXWARE_DISKLABEL config option). However BFS support does not
|
|
depend on having UnixWare disklabel support because one can also mount
|
|
BFS filesystem via loopback:
|
|
|
|
# losetup /dev/loop0 stand.img
|
|
# mount -t bfs /dev/loop0 /mnt/stand
|
|
|
|
where stand.img is a file containing the image of BFS filesystem.
|
|
When you have finished using it and umounted you need to also deallocate
|
|
/dev/loop0 device by:
|
|
|
|
# losetup -d /dev/loop0
|
|
|
|
You can simplify mounting by just typing:
|
|
|
|
# mount -t bfs -o loop stand.img /mnt/stand
|
|
|
|
this will allocate the first available loopback device (and load loop.o
|
|
kernel module if necessary) automatically. If the loopback driver is not
|
|
loaded automatically, make sure that you have compiled the module and
|
|
that modprobe is functioning. Beware that umount will not deallocate
|
|
/dev/loopN device if /etc/mtab file on your system is a symbolic link to
|
|
/proc/mounts. You will need to do it manually using "-d" switch of
|
|
losetup(8). Read losetup(8) manpage for more info.
|
|
|
|
To create the BFS image under UnixWare you need to find out first which
|
|
slice contains it. The command prtvtoc(1M) is your friend:
|
|
|
|
# prtvtoc /dev/rdsk/c0b0t0d0s0
|
|
|
|
(assuming your root disk is on target=0, lun=0, bus=0, controller=0). Then you
|
|
look for the slice with tag "STAND", which is usually slice 10. With this
|
|
information you can use dd(1) to create the BFS image:
|
|
|
|
# umount /stand
|
|
# dd if=/dev/rdsk/c0b0t0d0sa of=stand.img bs=512
|
|
|
|
Just in case, you can verify that you have done the right thing by checking
|
|
the magic number:
|
|
|
|
# od -Ad -tx4 stand.img | more
|
|
|
|
The first 4 bytes should be 0x1badface.
|
|
|
|
If you have any patches, questions or suggestions regarding this BFS
|
|
implementation please contact the author:
|
|
|
|
Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
|