From patchwork Fri Sep 13 10:25:02 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Lieven X-Patchwork-Id: 274714 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 7BD042C0174 for ; Fri, 13 Sep 2013 20:30:27 +1000 (EST) Received: from localhost ([::1]:45883 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VKQdt-0002W5-Bl for incoming@patchwork.ozlabs.org; Fri, 13 Sep 2013 06:30:25 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54063) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VKQb7-0007Hz-A6 for qemu-devel@nongnu.org; Fri, 13 Sep 2013 06:27:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VKQb1-0003kZ-HR for qemu-devel@nongnu.org; Fri, 13 Sep 2013 06:27:33 -0400 Received: from mx.ipv6.kamp.de ([2a02:248:0:51::16]:56032 helo=mx01.kamp.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VKQb1-0003jA-4X for qemu-devel@nongnu.org; Fri, 13 Sep 2013 06:27:27 -0400 Received: (qmail 3084 invoked by uid 89); 13 Sep 2013 10:27:26 -0000 Received: from [82.141.1.145] by client-16-kamp (envelope-from , uid 89) with qmail-scanner-2010/03/19-MF (clamdscan: 0.97.8/17847. hbedv: 8.2.12.118/7.11.102.86. spamassassin: 3.3.1. Clear:RC:1(82.141.1.145):SA:0(-1.2/5.0):. Processed in 10.174314 secs); 13 Sep 2013 10:27:26 -0000 Received: from ns.kamp-intra.net (HELO dns.kamp-intra.net) ([82.141.1.145]) by mx01.kamp.de with SMTP; 13 Sep 2013 10:27:15 -0000 X-GL_Whitelist: yes Received: from lieven-pc.kamp-intra.net (lieven-pc.kamp-intra.net [172.21.12.60]) by dns.kamp-intra.net (Postfix) with ESMTP id D4027206AC; Fri, 13 Sep 2013 12:25:14 +0200 (CEST) Received: by lieven-pc.kamp-intra.net (Postfix, from userid 1000) id D39EA61451; Fri, 13 Sep 2013 12:25:16 +0200 (CEST) From: Peter Lieven To: qemu-devel@nongnu.org Date: Fri, 13 Sep 2013 12:25:02 +0200 Message-Id: <1379067909-22984-6-git-send-email-pl@kamp.de> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1379067909-22984-1-git-send-email-pl@kamp.de> References: <1379067909-22984-1-git-send-email-pl@kamp.de> X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2a02:248:0:51::16 Cc: kwolf@redhat.com, ronniesahlberg@gmail.com, Peter Lieven , stefanha@redhat.com, anthony@codemonkey.ws, pbonzini@redhat.com Subject: [Qemu-devel] [PATCH 05/12] block: add logical block provisioning information to BlockDriverInfo X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Peter Lieven --- include/block/block.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/block/block.h b/include/block/block.h index 599de7d..ee17048 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -18,6 +18,15 @@ typedef struct BlockDriverInfo { /* offset at which the VM state can be saved (0 if not possible) */ int64_t vm_state_offset; bool is_dirty; + /* do discarded blocks read back as zeroes? */ + bool discard_zeroes; + /* is write zeroes optimized by a discard/unmap operation? + * this requires support for the BDRV_REQ_MAY_UNMAP flag. */ + bool discard_write_zeroes; + /* maximum number of sectors that can be discarded at once */ + int max_discard; + /* maximum number of sectors that can zeroized at once */ + int max_write_zeroes; } BlockDriverInfo; typedef struct BlockFragInfo {