From: Thomas Stewart Date: Wed, 26 May 2010 21:42:33 +0000 (-0700) Subject: ufs: permit mounting of BorderWare filesystems X-Git-Tag: v2.6.35-rc1~203 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d27d7a9a7838587fcdcc6f2b042f5610eb4984a1;p=pandora-kernel.git ufs: permit mounting of BorderWare filesystems I recently had to recover some files from an old broken machine that was running BorderWare Document Gateway. It's basically a drop in web server for sharing files. From the look of the init process and using strings on of a few files it seems to be based on FreeBSD 3.3. The process turned out to be more difficult than I imagined, but to cut a long story short BorderWare in their wisdom use a nonstandard magic number in their UFS (ufstype=44bsd) file systems. Thus Linux refuses to mount the file systems in order to recover the data. After a bit of hunting I was able to make a quick fix to fs/ufs/super.c in order to detect the new magic number. I assume that this number is the same for all installations. It's quite easy to find out from ufs_fs.h. The superblock sits 8k into the block device and the magic number its 1372 bytes into the superblock struct. # dd if=/dev/sda5 skip=$(( 8192 + 1372 )) bs=1 count=4 2> /dev/null | hd 00000000 97 26 24 0f |.&$.| # Signed-off-by: Thomas Stewart Cc: Evgeniy Dushistov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed