Re: [PATCH v8 00/41] Richacls

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On Mon, Oct 5, 2015 at 11:17 PM, Dave Chinner <david@xxxxxxxxxxxxx> wrote:
> On Mon, Oct 05, 2015 at 08:45:40PM +0200, Andreas Gruenbacher wrote:
>> On Sun, Oct 4, 2015 at 8:23 AM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
>> > 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.
>
> The hardest part for the filesystem support is the on-disk feature
> flag that needs to be set. The kernel part of that is easy, but it's
> an on-disk format change and so there's also all the userspace side
> for mkfs, fsck, debug tools, etc, that also need to be able to parse
> and understand it. So while the xattr code can be made much more
> generic, there's a bunch of filesystem specific code that needs to
> go into multiple different repositories and userspace packages for
> this.

Yes.

> Andreas, I also can't remember if any xfstests have been written for
> these ACLs? That would certainly help make sure all these
> filesystems have equivalent behaviour...

There's a reasonable amount of tests in the richacl user-space package
which are shell based, with a few small C helpers. We could move those
into xfstests eventually; now seems a bit early to me.

Thanks,
Andreas
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