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Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <611054C7-D6E8-4C89-958E-3128C9305E1E@amacapital.net> References: <611054C7-D6E8-4C89-958E-3128C9305E1E@amacapital.net> <20180712223223.GA28610@thunk.org> <153126248868.14533.9751473662727327569.stgit@warthog.procyon.org.uk> <153126264966.14533.3388004240803696769.stgit@warthog.procyon.org.uk> <686E805C-81F3-43D0-A096-50C644C57EE3@amacapital.net> <22370.1531293761@warthog.procyon.org.uk> <7002.1531407244@warthog.procyon.org.uk> <16699.1531426991@warthog.procyon.org.uk> <18233.1531430797@warthog.procyon.org.uk> <22105.1531436081@warthog.procyon.org.uk> To: Andy Lutomirski Cc: dhowells@redhat.com, "Theodore Y. Ts'o" , Linus Torvalds , Andrew Lutomirski , Al Viro , Linux API , linux-fsdevel , Linux Kernel Mailing List , Jann Horn Subject: Re: [PATCH 24/32] vfs: syscall: Add fsopen() to prepare for superblock creation [ver #9] MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <23893.1531438559.1@warthog.procyon.org.uk> Date: Fri, 13 Jul 2018 00:35:59 +0100 Message-ID: <23894.1531438559@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Thu, 12 Jul 2018 23:36:01 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Thu, 12 Jul 2018 23:36:01 +0000 (UTC) for IP:'10.11.54.5' DOMAIN:'int-mx05.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'dhowells@redhat.com' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Andy Lutomirski wrote: > I tend to think that this *should* fail using the new API. The semantics of > the second mount request are bizarre at best. You still have to support existing behaviour lest you break userspace. David