From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeffrey Altman Subject: Re: [PATCH 2/2] afs: Add metadata xattrs Date: Sat, 8 Jul 2017 22:37:53 -0400 Message-ID: <01f6dcaa-b310-63fa-f43d-2acf44d734c3@auristor.com> References: <20170706152304.GA10584@infradead.org> <149935261019.29744.8564287571048506851.stgit@warthog.procyon.org.uk> <149935262759.29744.6299062653432480230.stgit@warthog.procyon.org.uk> <31934.1499357651@warthog.procyon.org.uk> <2863583A-79F1-4998-8AC4-1C4C9D4C060F@dilger.ca> <20170709010155.3nql5ixdeozemgfd@thunk.org> Mime-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="------------ms090802030407060405010900" Return-path: In-Reply-To: <20170709010155.3nql5ixdeozemgfd-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Theodore Ts'o , Linus Torvalds , Andreas Dilger , David Howells , Christoph Hellwig , Alexander Viro , linux-fsdevel , Linux API , linux-afs-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Linux Kernel Mailing List List-Id: linux-api@vger.kernel.org This is a cryptographically signed message in MIME format. --------------ms090802030407060405010900 Content-Type: multipart/mixed; boundary="------------497045AE335F2A0CDD70A43E" Content-Language: en-US This is a multi-part message in MIME format. --------------497045AE335F2A0CDD70A43E Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 7/8/2017 9:01 PM, Theodore Ts'o wrote: > On Sat, Jul 08, 2017 at 12:44:54PM -0700, Linus Torvalds wrote: >> Yeah, I think attributes are likely much better than some random crazy= >> ioctl interface. They can be listed with generic tools, and have >> various scripting interfaces in ways that ioctl's do not sanely have. >=20 > I personally don't have a particular problem with these xattrs. For > one thing, they are read-only. You use them just to find out the AFS > cell, the AFS "fid", and the AFS volume name. >=20 > I think the place where people will start getting nervous is when we > start adding "write-only" xattrs or where writing to an xattr causes a > side-effect to take place. Ted, The list of AFS pioctls and the proposed alternatives for kAFS are listed at https://www.infradead.org/~dhowells/kafs/user_interface.html While it is true that the majority of the proposed xattrs are read-only properties of AFS objects (cell, volume, fid, servers, sec_class, sec_mode) there is one exception that is read-write (acls). AuriStorFS permits acls to be set per-file; there was some per-file acl work begun for OpenAFS but it was never completed. Is there an alternative for fetching and setting ACLs that should be considered? Jeffrey Altman --------------497045AE335F2A0CDD70A43E Content-Type: text/x-vcard; charset=utf-8; name="jaltman.vcf" Content-Transfer-Encoding: quoted-printable Content-Disposition: attachment; filename="jaltman.vcf" begin:vcard fn:Jeffrey Altman n:Altman;Jeffrey org:AuriStor, Inc. adr:Suite 6B;;255 West 94Th Street;New York;New York;10025-6985;United St= ates email;internet:jaltman-hRzEac23uH1Wk0Htik3J/w@public.gmane.org title:Founder and CEO tel;work:+1-212-769-9018 note;quoted-printable:LinkedIn: https://www.linkedin.com/in/jeffreyaltman= =3D0D=3D0A=3D Skype: jeffrey.e.altman=3D0D=3D0A=3D =09 url:https://www.auristor.com/ version:2.1 end:vcard --------------497045AE335F2A0CDD70A43E-- --------------ms090802030407060405010900 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature 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