From patchwork Mon Oct 12 15:08:01 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liran Schour X-Patchwork-Id: 35766 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]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 0985AB7063 for ; Tue, 13 Oct 2009 01:50:53 +1100 (EST) Received: from localhost ([127.0.0.1]:58248 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MxMEc-0003TD-C5 for incoming@patchwork.ozlabs.org; Mon, 12 Oct 2009 10:50:50 -0400 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MxM0J-00045q-FA for qemu-devel@nongnu.org; Mon, 12 Oct 2009 10:36:03 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MxM0D-0003w9-1u for qemu-devel@nongnu.org; Mon, 12 Oct 2009 10:36:02 -0400 Received: from [199.232.76.173] (port=49826 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MxM0C-0003vO-Gh for qemu-devel@nongnu.org; Mon, 12 Oct 2009 10:35:56 -0400 Received: from mtagate3.de.ibm.com ([195.212.17.163]:54490) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1MxM0B-0008Mq-LD for qemu-devel@nongnu.org; Mon, 12 Oct 2009 10:35:56 -0400 Received: from d12nrmr1607.megacenter.de.ibm.com (d12nrmr1607.megacenter.de.ibm.com [9.149.167.49]) by mtagate3.de.ibm.com (8.13.1/8.13.1) with ESMTP id n9CEZrY6004267 for ; Mon, 12 Oct 2009 14:35:53 GMT Received: from d12av04.megacenter.de.ibm.com (d12av04.megacenter.de.ibm.com [9.149.165.229]) by d12nrmr1607.megacenter.de.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id n9CEZsTb2084934 for ; Mon, 12 Oct 2009 16:35:54 +0200 Received: from d12av04.megacenter.de.ibm.com (loopback [127.0.0.1]) by d12av04.megacenter.de.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n9CEZrFm021898 for ; Mon, 12 Oct 2009 16:35:53 +0200 Received: from localhost.localdomain (im4-64s.haifa.ibm.com [9.148.27.41]) by d12av04.megacenter.de.ibm.com (8.12.11.20060308/8.12.11) with ESMTP id n9CEZqou021875; Mon, 12 Oct 2009 16:35:53 +0200 From: lirans@il.ibm.com To: qemu-devel@nongnu.org Date: Mon, 12 Oct 2009 17:08:01 +0200 Message-Id: <1255360081435-git-send-email-lirans@il.ibm.com> X-Mailer: git-send-email 1.5.2.4 X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) Cc: Liran Schour Subject: [Qemu-devel] [PATCH 1/3 v4] Expose a mechanisem to trace block writes 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 Signed-off-by: Liran Schour diff --git a/block.c b/block.c index 33f3d65..bf5f7a6 100644 --- a/block.c +++ b/block.c @@ -61,6 +61,8 @@ BlockDriverState *bdrv_first; static BlockDriver *first_drv; +static BlockDriverDirtyHandler *bdrv_dirty_handler = NULL; + int path_is_absolute(const char *path) { const char *p; @@ -626,6 +628,10 @@ int bdrv_write(BlockDriverState *bs, int64_t sector_num, if (bdrv_check_request(bs, sector_num, nb_sectors)) return -EIO; + if(bdrv_dirty_handler != NULL) { + bdrv_dirty_handler(bs, sector_num, nb_sectors); + } + return drv->bdrv_write(bs, sector_num, buf, nb_sectors); } @@ -1162,6 +1168,11 @@ int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, return -ENOTSUP; if (bdrv_check_request(bs, sector_num, nb_sectors)) return -EIO; + + if(bdrv_dirty_handler != NULL) { + bdrv_dirty_handler(bs, sector_num, nb_sectors); + } + return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); } @@ -1359,6 +1370,10 @@ BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, if (bdrv_check_request(bs, sector_num, nb_sectors)) return NULL; + if(bdrv_dirty_handler != NULL) { + bdrv_dirty_handler(bs, sector_num, nb_sectors); + } + ret = drv->bdrv_aio_writev(bs, sector_num, qiov, nb_sectors, cb, opaque); @@ -1869,7 +1884,19 @@ BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, return NULL; } + + void *qemu_blockalign(BlockDriverState *bs, size_t size) { return qemu_memalign((bs && bs->buffer_alignment) ? bs->buffer_alignment : 512, size); } + +void register_bdrv_dirty_tracking(BlockDriverDirtyHandler *dirty_handler) +{ + bdrv_dirty_handler = dirty_handler; +} + +void unregister_bdrv_dirty_tracking(void) +{ + bdrv_dirty_handler = NULL; +} diff --git a/block.h b/block.h index a966afb..9757a42 100644 --- a/block.h +++ b/block.h @@ -78,7 +78,8 @@ void bdrv_register(BlockDriver *bdrv); /* async block I/O */ typedef struct BlockDriverAIOCB BlockDriverAIOCB; typedef void BlockDriverCompletionFunc(void *opaque, int ret); - +typedef void BlockDriverDirtyHandler(BlockDriverState *bs, int64_t sector, + int sector_num); BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, QEMUIOVector *iov, int nb_sectors, BlockDriverCompletionFunc *cb, void *opaque); @@ -184,4 +185,7 @@ int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, int64_t pos, int size); +void register_bdrv_dirty_tracking(BlockDriverDirtyHandler *dirty_handler); +void unregister_bdrv_dirty_tracking(void); + #endif diff --git a/block_int.h b/block_int.h index 8e72abe..c524860 100644 --- a/block_int.h +++ b/block_int.h @@ -168,6 +168,7 @@ struct BlockDriverState { int cyls, heads, secs, translation; int type; char device_name[32]; + void *dirty_control; BlockDriverState *next; void *private; };