[ANNOUNCEMENT PATCH COW] proof of concept impementation of cowlinks

[Jörn Engel]

Couldn't sleep last night and finished a first complete version of
cowlinks, code-named MAD COW.  It is still based on the stupid old
design with a flag to distinguish between regular hard links and
cowlinks.  Please don't comment on that design, it's just a proof of
concept.

Patches are against 2.6.5 but most things should apply to other 2.6
kernel without too much trouble.

1 generic_sendpage	- allow sendfile with ext[23] files as target
2 sendfile		- introduce vfs_sendfile for in-kernel use
3 copyfile		- new copyfile() system call
4 lock_flags		- old cruft, just ignore it
5 madcow		- the MAD COW itself

Patches 1-3 will stay, 4 will be remove and 5 replaced by a better
design over time.  I've also set up a webpage for it:
http://wohnheim.fh-wedel.de/~joern/cowlink/

Maybe that should be converted into a wiki so someone with better
taste than myself can improve it.

Jörn

-- 
This above all: to thine own self be true.
-- Shakespeare
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