{"id":814193,"url":"http://patchwork.ozlabs.org/api/1.2/covers/814193/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/cover/20170915101008.16646-1-kwolf@redhat.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.2/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20170915101008.16646-1-kwolf@redhat.com>","list_archive_url":null,"date":"2017-09-15T10:10:02","name":"[0/6] block: Fix permissions after ro/rw reopen","submitter":{"id":2714,"url":"http://patchwork.ozlabs.org/api/1.2/people/2714/?format=json","name":"Kevin Wolf","email":"kwolf@redhat.com"},"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/cover/20170915101008.16646-1-kwolf@redhat.com/mbox/","series":[{"id":3264,"url":"http://patchwork.ozlabs.org/api/1.2/series/3264/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=3264","date":"2017-09-15T10:10:02","name":"block: Fix permissions after ro/rw reopen","version":1,"mbox":"http://patchwork.ozlabs.org/series/3264/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/covers/814193/comments/","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=)","ext-mx09.extmail.prod.ext.phx2.redhat.com;\n\tdmarc=none (p=none dis=none) header.from=redhat.com","ext-mx09.extmail.prod.ext.phx2.redhat.com;\n\tspf=fail smtp.mailfrom=kwolf@redhat.com"],"Received":["from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xtrlM1GM5z9sxR\n\tfor ;\n\tFri, 15 Sep 2017 20:11:11 +1000 (AEST)","from localhost ([::1]:52338 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t)\n\tid 1dsnaX-0002BK-7L\n\tfor incoming@patchwork.ozlabs.org; Fri, 15 Sep 2017 06:11:09 -0400","from eggs.gnu.org ([2001:4830:134:3::10]:37256)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from ) id 1dsnZo-00026R-Ls\n\tfor qemu-devel@nongnu.org; Fri, 15 Sep 2017 06:10:28 -0400","from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from ) id 1dsnZn-0004Ic-PX\n\tfor qemu-devel@nongnu.org; Fri, 15 Sep 2017 06:10:24 -0400","from mx1.redhat.com ([209.132.183.28]:51696)\n\tby eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from )\n\tid 1dsnZg-00049A-TF; Fri, 15 Sep 2017 06:10:17 -0400","from smtp.corp.redhat.com\n\t(int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby mx1.redhat.com (Postfix) with ESMTPS id 216144E4CB;\n\tFri, 15 Sep 2017 10:10:15 +0000 (UTC)","from localhost.localdomain.com (ovpn-117-157.ams2.redhat.com\n\t[10.36.117.157])\n\tby smtp.corp.redhat.com (Postfix) with ESMTP id C05D966D5F;\n\tFri, 15 Sep 2017 10:10:10 +0000 (UTC)"],"DMARC-Filter":"OpenDMARC Filter v1.3.2 mx1.redhat.com 216144E4CB","From":"Kevin Wolf ","To":"qemu-block@nongnu.org","Date":"Fri, 15 Sep 2017 12:10:02 +0200","Message-Id":"<20170915101008.16646-1-kwolf@redhat.com>","X-Scanned-By":"MIMEDefang 2.79 on 10.5.11.16","X-Greylist":"Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.38]);\n\tFri, 15 Sep 2017 10:10:15 +0000 (UTC)","X-detected-operating-system":"by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]\n\t[fuzzy]","X-Received-From":"209.132.183.28","Subject":"[Qemu-devel] [PATCH 0/6] block: Fix permissions after ro/rw reopen","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"kwolf@redhat.com, famz@redhat.com, qemu-devel@nongnu.org,\n\tmreitz@redhat.com","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"\"Qemu-devel\"\n\t"},"content":"bdrv_reopen() can switch nodes between read-only and read-write modes.\nThis has implications for the required permissions on their child nodes.\nFor example, a qcow2 node requests write permissions on bs->file only if\nit is writable itself.\n\nThis means that during bdrv_reopen(), the permissions need to be\nrecalculated in order to prevent failures where the bs->file\npermissions don't match its actual read-only state (e.g. bs->file is a\nread-write node, but the permission still enforces read-only access).\n\nKevin Wolf (6):\n qemu-io: Reset qemuio_blk permissions before each command\n block: Add reopen_queue to bdrv_child_perm()\n block: Add reopen queue to bdrv_check_perm()\n block: Base permissions on rw state after reopen\n block: reopen: Queue children after their parents\n block: Fix permissions after bdrv_reopen()\n\n include/block/block.h | 2 +-\n include/block/block_int.h | 7 ++\n block.c | 191 +++++++++++++++++++++++++++++++++------------\n block/commit.c | 1 +\n block/mirror.c | 1 +\n block/replication.c | 1 +\n block/vvfat.c | 1 +\n qemu-io.c | 13 +++\n tests/qemu-iotests/187.out | 2 +-\n 9 files changed, 169 insertions(+), 50 deletions(-)"}