{"id":1072853,"url":"http://patchwork.ozlabs.org/api/patches/1072853/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20190401140903.19186-13-eblake@redhat.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/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":"<20190401140903.19186-13-eblake@redhat.com>","list_archive_url":null,"date":"2019-04-01T14:09:01","name":"[PULL,12/14] block: Add bdrv_get_request_alignment()","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"60cdd243a85f94234ae3bbf35371a9e21fb8534b","submitter":{"id":6591,"url":"http://patchwork.ozlabs.org/api/people/6591/?format=json","name":"Eric Blake","email":"eblake@redhat.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20190401140903.19186-13-eblake@redhat.com/mbox/","series":[{"id":100345,"url":"http://patchwork.ozlabs.org/api/series/100345/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=100345","date":"2019-04-01T14:08:49","name":"[PULL,01/14] qemu-img: Report bdrv_block_status failures","version":1,"mbox":"http://patchwork.ozlabs.org/series/100345/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/1072853/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/1072853/checks/","tags":{},"related":[],"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=209.51.188.17; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=)","ozlabs.org;\n\tdmarc=fail (p=none dis=none) header.from=redhat.com"],"Received":["from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 44Xvdn2vjSz9sPp\n\tfor ;\n\tTue, 2 Apr 2019 01:21:01 +1100 (AEDT)","from localhost ([127.0.0.1]:36109 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t)\n\tid 1hAxo3-0005wI-CK\n\tfor incoming@patchwork.ozlabs.org; Mon, 01 Apr 2019 10:20:59 -0400","from eggs.gnu.org ([209.51.188.92]:46014)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from ) id 1hAxcs-0002BG-5P\n\tfor qemu-devel@nongnu.org; Mon, 01 Apr 2019 10:09:27 -0400","from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from ) id 1hAxcp-0004xq-Ni\n\tfor qemu-devel@nongnu.org; Mon, 01 Apr 2019 10:09:26 -0400","from mx1.redhat.com ([209.132.183.28]:48762)\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 1hAxcm-0004rc-6w; Mon, 01 Apr 2019 10:09:20 -0400","from smtp.corp.redhat.com\n\t(int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23])\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 3B7A29F728;\n\tMon, 1 Apr 2019 14:09:19 +0000 (UTC)","from blue.redhat.com (ovpn-116-75.phx2.redhat.com [10.3.116.75])\n\tby smtp.corp.redhat.com (Postfix) with ESMTP id 9898A19C70;\n\tMon, 1 Apr 2019 14:09:17 +0000 (UTC)"],"From":"Eric Blake ","To":"qemu-devel@nongnu.org","Date":"Mon, 1 Apr 2019 09:09:01 -0500","Message-Id":"<20190401140903.19186-13-eblake@redhat.com>","In-Reply-To":"<20190401140903.19186-1-eblake@redhat.com>","References":"<20190401140903.19186-1-eblake@redhat.com>","MIME-Version":"1.0","X-Scanned-By":"MIMEDefang 2.84 on 10.5.11.23","X-Greylist":"Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.39]);\n\tMon, 01 Apr 2019 14:09:19 +0000 (UTC)","Content-Transfer-Encoding":"quoted-printable","X-detected-operating-system":"by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]","X-Received-From":"209.132.183.28","Subject":"[Qemu-devel] [PULL 12/14] block: Add bdrv_get_request_alignment()","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":"Kevin Wolf ,\n\tVladimir Sementsov-Ogievskiy ,\n\t\"open list:Block layer core\" ,\n\tMax Reitz ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"\"Qemu-devel\"\n\t"},"content":"The next patch needs access to a device's minimum permitted\nalignment, since NBD wants to advertise this to clients. Add\nan accessor function, borrowing from blk_get_max_transfer()\nfor accessing a backend's block limits.\n\nSigned-off-by: Eric Blake \nReviewed-by: Vladimir Sementsov-Ogievskiy \nMessage-Id: <20190329042750.14704-6-eblake@redhat.com>\n---\n include/sysemu/block-backend.h | 1 +\n block/block-backend.c | 7 +++++++\n 2 files changed, 8 insertions(+)","diff":"diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h\nindex e2066eb06b2..3be05c2d689 100644\n--- a/include/sysemu/block-backend.h\n+++ b/include/sysemu/block-backend.h\n@@ -177,6 +177,7 @@ bool blk_is_available(BlockBackend *blk);\n void blk_lock_medium(BlockBackend *blk, bool locked);\n void blk_eject(BlockBackend *blk, bool eject_flag);\n int blk_get_flags(BlockBackend *blk);\n+uint32_t blk_get_request_alignment(BlockBackend *blk);\n uint32_t blk_get_max_transfer(BlockBackend *blk);\n int blk_get_max_iov(BlockBackend *blk);\n void blk_set_guest_block_size(BlockBackend *blk, int align);\ndiff --git a/block/block-backend.c b/block/block-backend.c\nindex edad02a0f2a..f78e82a707f 100644\n--- a/block/block-backend.c\n+++ b/block/block-backend.c\n@@ -1764,6 +1764,13 @@ int blk_get_flags(BlockBackend *blk)\n }\n }\n\n+/* Returns the minimum request alignment, in bytes; guaranteed nonzero */\n+uint32_t blk_get_request_alignment(BlockBackend *blk)\n+{\n+ BlockDriverState *bs = blk_bs(blk);\n+ return bs ? bs->bl.request_alignment : BDRV_SECTOR_SIZE;\n+}\n+\n /* Returns the maximum transfer length, in bytes; guaranteed nonzero */\n uint32_t blk_get_max_transfer(BlockBackend *blk)\n {\n","prefixes":["PULL","12/14"]}