From: Andreas Gruenbacher <agruenba@redhat.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: "Andreas Grünbacher" <andreas.gruenbacher@gmail.com>,
"Patrick Plagwitz" <Patrick_Plagwitz@web.de>,
"J. Bruce Fields" <bfields@fieldses.org>,
"linux-unionfs@vger.kernel.org" <linux-unionfs@vger.kernel.org>,
"Linux NFS list" <linux-nfs@vger.kernel.org>,
"Linux FS-devel Mailing List" <linux-fsdevel@vger.kernel.org>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] overlayfs: ignore empty NFSv4 ACLs in ext4 upperdir
Date: Tue, 6 Dec 2016 14:18:31 +0100 [thread overview]
Message-ID: <CAHc6FU4JQ28BFZE9_8A06gtkMvvKDzFmw9=ceNPYvnMXEimDMw@mail.gmail.com> (raw)
In-Reply-To: <CAJfpegvRFGOc31gVuYzanzWJ=mYSgRgtAaPhYNxZwHin3Wc0Gw@mail.gmail.com>
On Tue, Dec 6, 2016 at 11:08 AM, Miklos Szeredi <miklos@szeredi.hu> wrote:
> On Tue, Dec 6, 2016 at 12:24 AM, Andreas Grünbacher
> <andreas.gruenbacher@gmail.com> wrote:
>> 2016-12-06 0:19 GMT+01:00 Andreas Grünbacher <andreas.gruenbacher@gmail.com>:
>
>>> It's not hard to come up with a heuristic that determines if a
>>> system.nfs4_acl value is equivalent to a file mode, and to ignore the
>>> attribute in that case. (The file mode is transmitted in its own
>>> attribute already, so actually converting .) That way, overlayfs could
>>> still fail copying up files that have an actual ACL. It's still an
>>> ugly hack ...
>>
>> Actually, that kind of heuristic would make sense in the NFS client
>> which could then hide the "system.nfs4_acl" attribute.
>
> Even simpler would be if knfsd didn't send the attribute if not
> necessary. Looks like there's code actively creating the nfs4_acl on
> the wire even if the filesystem had none:
>
> pacl = get_acl(inode, ACL_TYPE_ACCESS);
> if (!pacl)
> pacl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
>
> What's the point?
That's how the protocol is specified. (I'm not saying that that's very helpful.)
Andreas
next prev parent reply other threads:[~2016-12-06 13:18 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <5a6862bd-924d-25e4-2a8e-ba4f51e66604@web.de>
2016-12-05 9:28 ` [PATCH] overlayfs: ignore empty NFSv4 ACLs in ext4 upperdir Miklos Szeredi
2016-12-05 15:19 ` J. Bruce Fields
2016-12-05 15:36 ` Miklos Szeredi
2016-12-05 16:25 ` J. Bruce Fields
2016-12-05 18:25 ` Patrick Plagwitz
2016-12-05 19:37 ` Andreas Grünbacher
2016-12-05 22:58 ` Patrick Plagwitz
2016-12-05 23:19 ` Andreas Grünbacher
2016-12-05 23:24 ` Andreas Grünbacher
2016-12-06 10:08 ` Miklos Szeredi
2016-12-06 13:18 ` Andreas Gruenbacher [this message]
2016-12-06 18:58 ` J. Bruce Fields
2019-05-02 2:02 ` NeilBrown
2019-05-02 2:54 ` Amir Goldstein
2019-05-02 3:57 ` NeilBrown
2019-05-02 14:04 ` Andreas Gruenbacher
2019-05-02 14:28 ` Miklos Szeredi
2019-05-02 15:08 ` Andreas Grünbacher
2019-05-02 17:16 ` J. Bruce Fields
2019-05-02 17:53 ` Andreas Gruenbacher
2019-05-02 23:04 ` NeilBrown
2019-05-02 23:24 ` NeilBrown
2019-05-03 6:54 ` Andreas Grünbacher
2019-05-02 17:26 ` Goetz, Patrick G
2019-05-02 17:44 ` Andreas Gruenbacher
2019-05-02 17:51 ` Goetz, Patrick G
2019-05-03 15:27 ` J. Bruce Fields
2019-05-03 17:39 ` Goetz, Patrick G
2019-05-02 4:35 ` [PATCH] OVL: add honoracl=off mount option NeilBrown
2019-05-02 5:08 ` Randy Dunlap
2019-05-02 11:46 ` Amir Goldstein
2019-05-02 23:19 ` NeilBrown
2019-05-02 13:47 ` J. R. Okajima
2019-05-03 15:35 ` [PATCH] overlayfs: ignore empty NFSv4 ACLs in ext4 upperdir J. Bruce Fields
2019-05-03 17:26 ` Amir Goldstein
2019-05-03 17:31 ` J. Bruce Fields
2019-05-03 17:41 ` Amir Goldstein
2019-05-03 17:51 ` Vivek Goyal
2019-05-07 0:24 ` NeilBrown
2019-05-10 20:09 ` J. Bruce Fields
2019-09-18 9:07 ` Miklos Szeredi
2019-09-18 19:49 ` J. Bruce Fields
2019-05-07 8:07 ` Miklos Szeredi
2019-05-07 23:51 ` J. Bruce Fields
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