From nobody Mon Feb 9 10:30:06 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=virtuozzo.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1518019742697373.3310703929683; Wed, 7 Feb 2018 08:09:02 -0800 (PST) Received: from localhost ([::1]:55338 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ejSHM-0006mH-Cm for importer@patchew.org; Wed, 07 Feb 2018 11:09:00 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48586) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ejS7V-00075N-Uk for qemu-devel@nongnu.org; Wed, 07 Feb 2018 10:58:51 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ejS7U-0000yv-AC for qemu-devel@nongnu.org; Wed, 07 Feb 2018 10:58:49 -0500 Received: from new-relay.sw.ru ([195.214.232.40]:47718) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ejS7O-0000lZ-4R; Wed, 07 Feb 2018 10:58:42 -0500 Received: from msk-vpn.virtuozzo.com ([195.214.232.6] helo=kvm.sw.ru) by new-relay.sw.ru with esmtp (Exim 4.89) (envelope-from ) id 1ejS7J-0004dD-Rq; Wed, 07 Feb 2018 18:58:37 +0300 From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org, qemu-devel@nongnu.org Date: Wed, 7 Feb 2018 18:58:28 +0300 Message-Id: <20180207155837.92351-4-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.11.1 In-Reply-To: <20180207155837.92351-1-vsementsov@virtuozzo.com> References: <20180207155837.92351-1-vsementsov@virtuozzo.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 195.214.232.40 Subject: [Qemu-devel] [PATCH v10 03/12] block/dirty-bitmap: add _locked version of bdrv_reclaim_dirty_bitmap X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, peter.maydell@linaro.org, vsementsov@virtuozzo.com, famz@redhat.com, lirans@il.ibm.com, quintela@redhat.com, jsnow@redhat.com, armbru@redhat.com, mreitz@redhat.com, stefanha@redhat.com, den@openvz.org, amit.shah@redhat.com, pbonzini@redhat.com, dgilbert@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Signed-off-by: Vladimir Sementsov-Ogievskiy --- include/block/dirty-bitmap.h | 3 +++ block/dirty-bitmap.c | 28 ++++++++++++++++++---------- 2 files changed, 21 insertions(+), 10 deletions(-) diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h index 93e128f81b..b2e1fd913a 100644 --- a/include/block/dirty-bitmap.h +++ b/include/block/dirty-bitmap.h @@ -92,5 +92,8 @@ BdrvDirtyBitmap *bdrv_dirty_bitmap_next(BlockDriverState = *bs, BdrvDirtyBitmap *bitmap); char *bdrv_dirty_bitmap_sha256(const BdrvDirtyBitmap *bitmap, Error **errp= ); int64_t bdrv_dirty_bitmap_next_zero(BdrvDirtyBitmap *bitmap, uint64_t star= t); +BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap_locked(BlockDriverState *bs, + BdrvDirtyBitmap *bitmap, + Error **errp); =20 #endif diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index 75435f6c2f..ce00ff3474 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -320,17 +320,13 @@ BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriv= erState *bs, * In cases of failure where we can no longer safely delete the parent, * we may wish to re-join the parent and child/successor. * The merged parent will be un-frozen, but not explicitly re-enabled. - * Called with BQL taken. + * Called within bdrv_dirty_bitmap_lock..unlock and with BQL taken. */ -BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs, - BdrvDirtyBitmap *parent, - Error **errp) +BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap_locked(BlockDriverState *bs, + BdrvDirtyBitmap *parent, + Error **errp) { - BdrvDirtyBitmap *successor; - - qemu_mutex_lock(parent->mutex); - - successor =3D parent->successor; + BdrvDirtyBitmap *successor =3D parent->successor; =20 if (!successor) { error_setg(errp, "Cannot reclaim a successor when none is present"= ); @@ -344,9 +340,21 @@ BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriver= State *bs, bdrv_release_dirty_bitmap_locked(bs, successor); parent->successor =3D NULL; =20 + return parent; +} + +/* Called with BQL taken. */ +BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs, + BdrvDirtyBitmap *parent, + Error **errp) +{ + BdrvDirtyBitmap *ret; + + qemu_mutex_lock(parent->mutex); + ret =3D bdrv_reclaim_dirty_bitmap_locked(bs, parent, errp); qemu_mutex_unlock(parent->mutex); =20 - return parent; + return ret; } =20 /** --=20 2.11.1