From patchwork Thu Oct 24 07:46:41 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Lieven X-Patchwork-Id: 285800 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 53DC32C016A for ; Thu, 24 Oct 2013 18:52:07 +1100 (EST) Received: from localhost ([::1]:53030 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VZFi9-000349-6g for incoming@patchwork.ozlabs.org; Thu, 24 Oct 2013 03:52:05 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49811) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VZFev-0006rz-RY for qemu-devel@nongnu.org; Thu, 24 Oct 2013 03:48:52 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VZFen-0004Tx-JO for qemu-devel@nongnu.org; Thu, 24 Oct 2013 03:48:45 -0400 Received: from mx.ipv6.kamp.de ([2a02:248:0:51::16]:47570 helo=mx01.kamp.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VZFen-0004SZ-73 for qemu-devel@nongnu.org; Thu, 24 Oct 2013 03:48:37 -0400 Received: (qmail 22754 invoked by uid 89); 24 Oct 2013 07:48:36 -0000 Received: from [82.141.1.145] by client-16-kamp (envelope-from , uid 89) with qmail-scanner-2010/03/19-MF (clamdscan: 0.98/18001. hbedv: 8.2.12.132/7.11.109.62. spamassassin: 3.3.1. Clear:RC:1(82.141.1.145):SA:0(-1.2/5.0):. Processed in 1.339559 secs); 24 Oct 2013 07:48:36 -0000 Received: from ns.kamp-intra.net (HELO dns.kamp-intra.net) ([82.141.1.145]) by mx01.kamp.de with SMTP; 24 Oct 2013 07:48:34 -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 795FE206AE; Thu, 24 Oct 2013 09:46:52 +0200 (CEST) Received: by lieven-pc.kamp-intra.net (Postfix, from userid 1000) id CD235613A5; Thu, 24 Oct 2013 09:46:57 +0200 (CEST) From: Peter Lieven To: qemu-devel@nongnu.org Date: Thu, 24 Oct 2013 09:46:41 +0200 Message-Id: <1382600811-20043-8-git-send-email-pl@kamp.de> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1382600811-20043-1-git-send-email-pl@kamp.de> References: <1382600811-20043-1-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, stefanha@redhat.com, Peter Lieven , ronniesahlberg@gmail.com, pbonzini@redhat.com Subject: [Qemu-devel] [PATCHv6 07/17] 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 9bbaa29..33be247 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -227,6 +227,20 @@ 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 @@ -280,6 +294,9 @@ 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;