From patchwork Mon Apr 24 19:19:59 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Cody X-Patchwork-Id: 9697035 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 330BB603F3 for ; Mon, 24 Apr 2017 19:25:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1DBDE28305 for ; Mon, 24 Apr 2017 19:25:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1120B28433; Mon, 24 Apr 2017 19:25:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id BAA9F28305 for ; Mon, 24 Apr 2017 19:25:04 +0000 (UTC) Received: from localhost ([::1]:45599 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d2jbb-0004cm-V4 for patchwork-qemu-devel@patchwork.kernel.org; Mon, 24 Apr 2017 15:25:04 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46694) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d2jX5-0001fO-Sr for qemu-devel@nongnu.org; Mon, 24 Apr 2017 15:20:24 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d2jX5-0002nu-1r for qemu-devel@nongnu.org; Mon, 24 Apr 2017 15:20:23 -0400 Received: from mx1.redhat.com ([209.132.183.28]:55042) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d2jWy-0002hu-T4; Mon, 24 Apr 2017 15:20:17 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id C18B87E9D5; Mon, 24 Apr 2017 19:20:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com C18B87E9D5 Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=jcody@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com C18B87E9D5 Received: from localhost (ovpn-120-118.rdu2.redhat.com [10.10.120.118]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 881465C3FA; Mon, 24 Apr 2017 19:20:15 +0000 (UTC) From: Jeff Cody To: qemu-block@nongnu.org Date: Mon, 24 Apr 2017 15:19:59 -0400 Message-Id: <20170424192002.18622-10-jcody@redhat.com> In-Reply-To: <20170424192002.18622-1-jcody@redhat.com> References: <20170424192002.18622-1-jcody@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Mon, 24 Apr 2017 19:20:16 +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] [PULL v2 09/12] block: use bdrv_can_set_read_only() during reopen 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: peter.maydell@linaro.org, jcody@redhat.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Jeff Cody Reviewed-by: Stefan Hajnoczi Reviewed-by: John Snow Message-id: 00aed7ffdd7be4b9ed9ce1007d50028a72b34ebe.1491597120.git.jcody@redhat.com --- block.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/block.c b/block.c index 1ac05c1..5db266b 100644 --- a/block.c +++ b/block.c @@ -2789,6 +2789,7 @@ int bdrv_reopen_prepare(BDRVReopenState *reopen_state, BlockReopenQueue *queue, BlockDriver *drv; QemuOpts *opts; const char *value; + bool read_only; assert(reopen_state != NULL); assert(reopen_state->bs->drv != NULL); @@ -2817,12 +2818,13 @@ int bdrv_reopen_prepare(BDRVReopenState *reopen_state, BlockReopenQueue *queue, qdict_put(reopen_state->options, "driver", qstring_from_str(value)); } - /* if we are to stay read-only, do not allow permission change - * to r/w */ - if (!(reopen_state->bs->open_flags & BDRV_O_ALLOW_RDWR) && - reopen_state->flags & BDRV_O_RDWR) { - error_setg(errp, "Node '%s' is read only", - bdrv_get_device_or_node_name(reopen_state->bs)); + /* If we are to stay read-only, do not allow permission change + * to r/w. Attempting to set to r/w may fail if either BDRV_O_ALLOW_RDWR is + * not set, or if the BDS still has copy_on_read enabled */ + read_only = !(reopen_state->flags & BDRV_O_RDWR); + ret = bdrv_can_set_read_only(reopen_state->bs, read_only, &local_err); + if (local_err) { + error_propagate(errp, local_err); goto error; }