On Sun, Oct 4, 2015 at 8:23 AM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:I think the point is that a new VFS feature that is easy to integrate in multiple filesystems should have support for those filesystems. A decade ago, just having ext* support would probably have been fine, but these days, XFS, BTRFS, and F2FS are used just as much (if not more) on production systems as ext4, and having support for them right from the start would significantly help with adoption of richacls.
On Mon, Sep 28, 2015 at 12:08:51AM +0200, Andreas Gruenbacher wrote:
Hello,
here's another update of the richacl patch queue. At this stage, I would
like to ask for final feedback so that the core and ext4 code (patches
1-19) can be merged in the 4.4 merge window. The nfsd and nfs code should
then go through the respective maintainer trees.
Now way in this form even if everyone agrees we should have these
bastard ACLs. I certainly disagree.
Well, thanks for having a look at the patches.
Ayway, back to the VFS <-> FS interface. You still require tons of
boilderplate code in the filesystem which isn't required and we got rid
of for Posix ACLs. The filesystem should not look at the userspace
xattr format, please follow a model similar to ->get_acl and ->set_acl
for Posix ACLs.
I will repost a version that has this cleaned up.
After that the wire up should be so trivial that you can wire up btrfs,
xfs and f2fs as well, which is important to make the feature mergeable.
Why would the patch queue become more mergeable by having support for
more filesystems in it? The filesystem specific code really isn't all
that interesting.
And honestly I tink adding even more overload to xattrs is a really bad
idea and after 10 years of experience with that junk we really need to
learn and make new overloads proper system calls.
Thanks,
Andreas
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