From patchwork Mon Mar 6 16:21:59 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 735839 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)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3vcQ8758QVz9s7k for ; Tue, 7 Mar 2017 03:23:35 +1100 (AEDT) Received: from localhost ([::1]:44791 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ckvQ5-0002lJ-4Y for incoming@patchwork.ozlabs.org; Mon, 06 Mar 2017 11:23:33 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54647) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ckvPC-0002ck-6v for qemu-devel@nongnu.org; Mon, 06 Mar 2017 11:22:39 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ckvPB-0001DK-A4 for qemu-devel@nongnu.org; Mon, 06 Mar 2017 11:22:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:46974) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ckvP8-0001Br-Tj; Mon, 06 Mar 2017 11:22:35 -0500 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 20FAEC057FA5; Mon, 6 Mar 2017 16:22:35 +0000 (UTC) Received: from noname.redhat.com (ovpn-116-180.ams2.redhat.com [10.36.116.180]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v26GMJmx031063; Mon, 6 Mar 2017 11:22:33 -0500 From: Kevin Wolf To: qemu-block@nongnu.org Date: Mon, 6 Mar 2017 17:21:59 +0100 Message-Id: <1488817322-11397-8-git-send-email-kwolf@redhat.com> In-Reply-To: <1488817322-11397-1-git-send-email-kwolf@redhat.com> References: <1488817322-11397-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Mon, 06 Mar 2017 16:22:35 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 07/10] block: Factor out bdrv_replace_child_noperm() 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, jcody@redhat.com, famz@redhat.com, qemu-devel@nongnu.org, mreitz@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Kevin Wolf Reviewed-by: Eric Blake --- block.c | 38 +++++++++++++++++++++++++------------- 1 file changed, 25 insertions(+), 13 deletions(-) diff --git a/block.c b/block.c index 6dc02b8..d4570c8 100644 --- a/block.c +++ b/block.c @@ -1713,11 +1713,10 @@ void bdrv_format_default_perms(BlockDriverState *bs, BdrvChild *c, *nshared = shared; } -static void bdrv_replace_child(BdrvChild *child, BlockDriverState *new_bs, - bool check_new_perm) +static void bdrv_replace_child_noperm(BdrvChild *child, + BlockDriverState *new_bs) { BlockDriverState *old_bs = child->bs; - uint64_t perm, shared_perm; if (old_bs) { if (old_bs->quiesce_counter && child->role->drained_end) { @@ -1727,7 +1726,29 @@ static void bdrv_replace_child(BdrvChild *child, BlockDriverState *new_bs, child->role->detach(child); } QLIST_REMOVE(child, next_parent); + } + + child->bs = new_bs; + + if (new_bs) { + QLIST_INSERT_HEAD(&new_bs->parents, child, next_parent); + if (new_bs->quiesce_counter && child->role->drained_begin) { + child->role->drained_begin(child); + } + + if (child->role->attach) { + child->role->attach(child); + } + } +} +static void bdrv_replace_child(BdrvChild *child, BlockDriverState *new_bs, + bool check_new_perm) +{ + BlockDriverState *old_bs = child->bs; + uint64_t perm, shared_perm; + + if (old_bs) { /* Update permissions for old node. This is guaranteed to succeed * because we're just taking a parent away, so we're loosening * restrictions. */ @@ -1736,23 +1757,14 @@ static void bdrv_replace_child(BdrvChild *child, BlockDriverState *new_bs, bdrv_set_perm(old_bs, perm, shared_perm); } - child->bs = new_bs; + bdrv_replace_child_noperm(child, new_bs); if (new_bs) { - QLIST_INSERT_HEAD(&new_bs->parents, child, next_parent); - if (new_bs->quiesce_counter && child->role->drained_begin) { - child->role->drained_begin(child); - } - bdrv_get_cumulative_perm(new_bs, &perm, &shared_perm); if (check_new_perm) { bdrv_check_perm(new_bs, perm, shared_perm, &error_abort); } bdrv_set_perm(new_bs, perm, shared_perm); - - if (child->role->attach) { - child->role->attach(child); - } } }