Bind Mount Extensions (RO --bind mounts)

[Herbert Poetzl]

Hi All!

just verified that the patches still apply on  
linux-2.6.0-test5-bk9 and linux-2.4.23-pre5  
without any issues ...

FYI, this patch (hopefully) allows RO --bind mounts 
to 'behave' like other ro mounted filesystems ...

AFAIK, it handles the following cases as expected:

 - open (read/write/trunc), create
 - link, symlink, unlink
 - mknod (reg/block/char/fifo), mkfifo
 - mkdir, rmdir
 - (f)chown, (f)chmod, utimes
 - ioctl (gen/ext2/ext3/reiser)
 - access, truncate

it doesn't handle update_atime() yet (Al Viro is still
busy ;) and it doesn't change current intermezzo code 
(but this would be easy to add, because it's almost the 
same as the vfs_*()s at least regarding ro --bind mounts)

you can get them at:

http://vserver.13thfloor.at/Experimental/patch-2.4.22-rc2-bme0.03.diff
http://vserver.13thfloor.at/Experimental/patch-2.4.22-rc2-bme0.03.diff.bz2
http://vserver.13thfloor.at/Experimental/patch-2.6.0-test3-bme0.03.diff
http://vserver.13thfloor.at/Experimental/patch-2.6.0-test3-bme0.03.diff.bz2

enjoy,
Herbert


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