From patchwork Tue Oct 8 11:58:00 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Lieven X-Patchwork-Id: 281455 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 E740C2C00B3 for ; Tue, 8 Oct 2013 23:36:01 +1100 (EST) Received: from localhost ([::1]:36034 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VTVzM-0002XT-2F for incoming@patchwork.ozlabs.org; Tue, 08 Oct 2013 08:02:08 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51560) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VTVxm-00013O-6Y for qemu-devel@nongnu.org; Tue, 08 Oct 2013 08:00:35 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VTVxa-0003vS-OB for qemu-devel@nongnu.org; Tue, 08 Oct 2013 08:00:30 -0400 Received: from mx.ipv6.kamp.de ([2a02:248:0:51::16]:53815 helo=mx01.kamp.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VTVxa-0003uW-DS for qemu-devel@nongnu.org; Tue, 08 Oct 2013 08:00:18 -0400 Received: (qmail 5385 invoked by uid 89); 8 Oct 2013 12:00:17 -0000 Received: from [82.141.1.145] by client-16-kamp (envelope-from , uid 89) with qmail-scanner-2010/03/19-MF (clamdscan: 0.98/17948. hbedv: 8.2.12.126/7.11.106.104. spamassassin: 3.3.1. Clear:RC:1(82.141.1.145):SA:0(-1.2/5.0):. Processed in 1.366346 secs); 08 Oct 2013 12:00:17 -0000 Received: from ns.kamp-intra.net (HELO dns.kamp-intra.net) ([82.141.1.145]) by mx01.kamp.de with SMTP; 8 Oct 2013 12:00:15 -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 9ABED206AD; Tue, 8 Oct 2013 13:58:10 +0200 (CEST) Received: by lieven-pc.kamp-intra.net (Postfix, from userid 1000) id 8041E612C6; Tue, 8 Oct 2013 13:58:12 +0200 (CEST) From: Peter Lieven To: qemu-devel@nongnu.org Date: Tue, 8 Oct 2013 13:58:00 +0200 Message-Id: <1381233491-17019-7-git-send-email-pl@kamp.de> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1381233491-17019-1-git-send-email-pl@kamp.de> References: <1381233491-17019-1-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] [PATCHv4 06/17] block: add BlockLimits structure to BlockDriverState 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 this patch adds BlockLimits which introduces discard and write_zeroes limits and alignment information to the BlockDriverState. Signed-off-by: Peter Lieven --- include/block/block_int.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/include/block/block_int.h b/include/block/block_int.h index ce5c62e..775b7ab 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -233,6 +233,20 @@ struct BlockDriver { QLIST_ENTRY(BlockDriver) list; }; +typedef struct BlockLimits { + /* maximum number of sectors that can be discarded at once */ + int max_discard; + + /* optimal alignment for discard requests in sectors */ + int64_t discard_alignment; + + /* maximum number of sectors that can zeroized at once */ + int max_write_zeroes; + + /* optimal alignment for write zeroes requests in sectors */ + int64_t write_zeroes_alignment; +} BlockLimits; + /* * Note: the function bdrv_append() copies and swaps contents of * BlockDriverStates, so if you add new fields to this struct, please @@ -286,6 +300,9 @@ struct BlockDriverState { uint64_t total_time_ns[BDRV_MAX_IOTYPE]; uint64_t wr_highest_sector; + /* I/O Limits */ + BlockLimits bl; + /* Whether the disk can expand beyond total_sectors */ int growable;