From patchwork Fri Jan 14 16:21:04 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 78955 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [199.232.76.165]) by ozlabs.org (Postfix) with ESMTP id 0BF21B70B3 for ; Sat, 15 Jan 2011 03:30:44 +1100 (EST) Received: from localhost ([127.0.0.1]:42742 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PdmSD-0007fd-5b for incoming@patchwork.ozlabs.org; Fri, 14 Jan 2011 11:24:45 -0500 Received: from [140.186.70.92] (port=54487 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PdmOr-000587-LX for qemu-devel@nongnu.org; Fri, 14 Jan 2011 11:21:19 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PdmOg-00045l-2R for qemu-devel@nongnu.org; Fri, 14 Jan 2011 11:21:07 -0500 Received: from verein.lst.de ([213.95.11.210]:37077) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PdmOf-00045b-NE for qemu-devel@nongnu.org; Fri, 14 Jan 2011 11:21:06 -0500 Received: from verein.lst.de (localhost [127.0.0.1]) by verein.lst.de (8.12.3/8.12.3/Debian-7.1) with ESMTP id p0EGL4E5019208 (version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO) for ; Fri, 14 Jan 2011 17:21:04 +0100 Received: (from hch@localhost) by verein.lst.de (8.12.3/8.12.3/Debian-7.2) id p0EGL4nq019207 for qemu-devel@nongnu.org; Fri, 14 Jan 2011 17:21:04 +0100 Date: Fri, 14 Jan 2011 17:21:04 +0100 From: Christoph Hellwig To: qemu-devel@nongnu.org Message-ID: <20110114162104.GB19184@lst.de> References: <20110114162044.GA19114@lst.de> Mime-Version: 1.0 Content-Disposition: inline In-Reply-To: <20110114162044.GA19114@lst.de> User-Agent: Mutt/1.3.28i X-Scanned-By: MIMEDefang 2.39 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) Subject: [Qemu-devel] [PATCH 2/3] block: tell drivers about an image resize X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Add a new size_changed flag in the BlockDriverState and call the change_cb callback to notify drivers about a size change. Signed-off-by: Christoph Hellwig Index: qemu/block.c =================================================================== --- qemu.orig/block.c 2011-01-14 17:05:49.527003363 +0100 +++ qemu/block.c 2011-01-14 17:07:23.206255143 +0100 @@ -1135,6 +1135,10 @@ int bdrv_truncate(BlockDriverState *bs, ret = drv->bdrv_truncate(bs, offset); if (ret == 0) { ret = refresh_total_sectors(bs, offset >> BDRV_SECTOR_BITS); + if (bs->change_cb) { + bs->size_changed = 1; + bs->change_cb(bs->change_opaque); + } } return ret; } Index: qemu/block_int.h =================================================================== --- qemu.orig/block_int.h 2011-01-14 17:05:49.537004411 +0100 +++ qemu/block_int.h 2011-01-14 17:06:02.539004271 +0100 @@ -167,6 +167,7 @@ struct BlockDriverState { char backing_format[16]; /* if non-zero and backing_file exists */ int is_temporary; int media_changed; + int size_changed; BlockDriverState *backing_hd; BlockDriverState *file;