From: Andreas Dilger Subject: Re: [PATCH v8 00/41] Richacls Date: Tue, 6 Oct 2015 14:26:09 -0600 Message-ID: References: <1443391772-10171-1-git-send-email-agruenba@redhat.com> <20151004062313.GA20212@infradead.org> <5612C85C.2060407@gmail.com> <20151006094935.GA14144@infradead.org> Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) Content-Type: multipart/signed; boundary="Apple-Mail=_2BC013DC-9D8C-45B8-8CC6-5E5219C7CBCA"; protocol="application/pgp-signature"; micalg=pgp-sha256 Cc: Christoph Hellwig , Austin S Hemmelgarn , Alexander Viro , Theodore Ts'o , "J. Bruce Fields" , Jeff Layton , Trond Myklebust , Anna Schumaker , linux-ext4 , LKML , linux-fsdevel , linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Linux API To: Andreas Gruenbacher Return-path: In-Reply-To: Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-ext4.vger.kernel.org --Apple-Mail=_2BC013DC-9D8C-45B8-8CC6-5E5219C7CBCA Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On Oct 6, 2015, at 7:12 AM, Andreas Gruenbacher = wrote: >=20 > On Tue, Oct 6, 2015 at 11:49 AM, Christoph Hellwig = wrote: >> On Mon, Oct 05, 2015 at 02:58:36PM -0400, Austin S Hemmelgarn 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. >>=20 >> That's one reason. The other is that actually wiring it up for more >> than a single consumer shows its actually reasonable generic. >=20 > The filesystem interface now is the same as for POSIX ACLs, used by a > dozen or so filesystems already. >=20 >> I don't want to end up with a situration like Posix ACLs again where >> different file systems using different on disk formats again. >=20 > Any file system could choose a different on-disk format than the one > that ext4 currently uses, but I don't see a reason why any should. > Apart from uid / gid mappings that is the same as the user-space xattr > format. Network file systems like NFSv4 and CIFS with their predefined > over-the-wire formats obviously are another story. And any disk filesystems that have their own non-POSIX ACLs, such as = HFS, NTFS, ZFS would presumably also need to map the in-kernel Richacl = format to their on-disk format. Cheers, Andreas --Apple-Mail=_2BC013DC-9D8C-45B8-8CC6-5E5219C7CBCA Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iQIVAwUBVhQuY3Kl2rkXzB/gAQjy2BAAp5upU1xFGzGv3nOJ9JW0EHZff4l7ccFu kwFjn/6rotF6OXO0YQQGXUgZp6SlKN1ytoxJBV4l3A1ukb2ufRld6iiOEOmibZuT LGJuGAbQnT6KSL+IYtT9Jz/2cWw5fnHw8QKYtphzqrBbHJqqbcS0IMDw5WTfw0Y7 S9ayWZGNITtbjo49Kjmw90cwk/s7WUGr9r3zzgmp8rXzFRYoyF2WgopzK5Gwb+Ak fB+JvHWq/9+PrKfY1Iyk+PhxuLL71r6z4yol9POUY+BFD2xGxiSKfHhIuSO6gnXT k0CaZvVG2hrCLsRUTwd9MnyC7Zsb5wNMvLnJOq2NyajYBR60l62IZ4hImKPmg/ej EZ1WyPObjhIjgdzI33zRHhpaZBvmFqL2vmv7N7EfhjLbePWeMrv3r4tQxN+syHRW D5ghIj1nhYcEsesRbLvu7WxEO9AnSy7na9L+84T/1Bt6bmO0BPvwEeGSx2KzccE0 QpgaxRr9SG/CLiq8fO6Hb+5B+yfiUEHIT2zNDIrW33fSEvHbVA1nDbiDhXSLCLK+ NszXTjQ1i3nEINx+1tuT+62bhSgGRUfUwdoW4TSTkUR069N8JWiUOtQQaK7kIyuq IrzYsB5OO2SWBYgsL50GhdjASDi2B6f9qBVLKWDLufPBtHtx+OllYtp4uZl0tcAI KzKVmTgB4RU= =CoPb -----END PGP SIGNATURE----- --Apple-Mail=_2BC013DC-9D8C-45B8-8CC6-5E5219C7CBCA--