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From: Christoph Hellwig on 20 May 2010 04:40
On Tue, May 18, 2010 at 08:50:32AM +0800, Shi Weihua wrote:
> On btrfs, do the following
> ------------------
> # su user1
> # cd btrfs-part/
> # touch aaa
> # getfacl aaa
> # file: aaa
> # owner: user1
> # group: user1
> user::rw-
> group::rw-
> other::r--
> # su user2
> # cd btrfs-part/
> # setfacl -m u::rwx aaa
> # getfacl aaa
> # file: aaa
> # owner: user1
> # group: user1
> user::rwx <- successed to setfacl
> group::rw-
> other::r--
> ------------------
> but we should prohibit it that user2 changing user1's acl.
> In fact, on ext3 and other fs, a message occurs:
> setfacl: aaa: Operation not permitted

Can you add this as a new testcase to xfstests so that we can easiy
check for regressions and future filesystems implementing this
correctly?

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