From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1E73C4360C for ; Fri, 27 Sep 2019 14:22:06 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C3E2A217D9 for ; Fri, 27 Sep 2019 14:22:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C3E2A217D9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=virtuozzo.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:51552 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iDr8H-00058h-4h for qemu-devel@archiver.kernel.org; Fri, 27 Sep 2019 10:22:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:34470) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iDqCh-0003Tr-Ie for qemu-devel@nongnu.org; Fri, 27 Sep 2019 09:22:37 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iDqCg-0000KJ-2i for qemu-devel@nongnu.org; Fri, 27 Sep 2019 09:22:35 -0400 Received: from relay.sw.ru ([185.231.240.75]:49752) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iDqCa-0000IU-4E; Fri, 27 Sep 2019 09:22:28 -0400 Received: from [10.94.3.0] (helo=kvm.qa.sw.ru) by relay.sw.ru with esmtp (Exim 4.92.2) (envelope-from ) id 1iDpHz-0003za-HR; Fri, 27 Sep 2019 15:23:59 +0300 From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Subject: [PATCH v5 9/9] qcow2-bitmap: move bitmap reopen-rw code to qcow2_reopen_commit Date: Fri, 27 Sep 2019 15:23:55 +0300 Message-Id: <20190927122355.7344-10-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190927122355.7344-1-vsementsov@virtuozzo.com> References: <20190927122355.7344-1-vsementsov@virtuozzo.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 185.231.240.75 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: fam@euphon.net, kwolf@redhat.com, vsementsov@virtuozzo.com, qemu-devel@nongnu.org, mreitz@redhat.com, den@openvz.org, jsnow@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The only reason I can imagine for this strange code at the very-end of bdrv_reopen_commit is the fact that bs->read_only updated after calling drv->bdrv_reopen_commit in bdrv_reopen_commit. And in the same time, prior to previous commit, qcow2_reopen_bitmaps_rw did a wrong check for being writable, when actually it only need writable file child not self. So, as it's fixed, let's move things to correct place. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: John Snow Acked-by: Max Reitz --- include/block/block_int.h | 6 ------ block.c | 19 ------------------- block/qcow2.c | 15 ++++++++++++++- 3 files changed, 14 insertions(+), 26 deletions(-) diff --git a/include/block/block_int.h b/include/block/block_int.h index 0422acdf1c..039a44a959 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -546,12 +546,6 @@ struct BlockDriver { uint64_t parent_perm, uint64_t parent_shared, uint64_t *nperm, uint64_t *nshared); - /** - * Bitmaps should be marked as 'IN_USE' in the image on reopening image - * as rw. This handler should realize it. It also should unset readonly - * field of BlockDirtyBitmap's in case of success. - */ - int (*bdrv_reopen_bitmaps_rw)(BlockDriverState *bs, Error **errp); bool (*bdrv_can_store_new_dirty_bitmap)(BlockDriverState *bs, const char *name, uint32_t granularity, diff --git a/block.c b/block.c index a2de16c8c7..2f2b7b3c57 100644 --- a/block.c +++ b/block.c @@ -3935,16 +3935,12 @@ void bdrv_reopen_commit(BDRVReopenState *reopen_state) BlockDriver *drv; BlockDriverState *bs; BdrvChild *child; - bool old_can_write, new_can_write; assert(reopen_state != NULL); bs = reopen_state->bs; drv = bs->drv; assert(drv != NULL); - old_can_write = - !bdrv_is_read_only(bs) && !(bdrv_get_flags(bs) & BDRV_O_INACTIVE); - /* If there are any driver level actions to take */ if (drv->bdrv_reopen_commit) { drv->bdrv_reopen_commit(reopen_state); @@ -3988,21 +3984,6 @@ void bdrv_reopen_commit(BDRVReopenState *reopen_state) } bdrv_refresh_limits(bs, NULL); - - new_can_write = - !bdrv_is_read_only(bs) && !(bdrv_get_flags(bs) & BDRV_O_INACTIVE); - if (!old_can_write && new_can_write && drv->bdrv_reopen_bitmaps_rw) { - Error *local_err = NULL; - if (drv->bdrv_reopen_bitmaps_rw(bs, &local_err) < 0) { - /* This is not fatal, bitmaps just left read-only, so all following - * writes will fail. User can remove read-only bitmaps to unblock - * writes. - */ - error_reportf_err(local_err, - "%s: Failed to make dirty bitmaps writable: ", - bdrv_get_node_name(bs)); - } - } } /* diff --git a/block/qcow2.c b/block/qcow2.c index a3d672e9b2..758c37cd3e 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1834,6 +1834,20 @@ fail: static void qcow2_reopen_commit(BDRVReopenState *state) { qcow2_update_options_commit(state->bs, state->opaque); + if (state->flags & BDRV_O_RDWR) { + Error *local_err = NULL; + + if (qcow2_reopen_bitmaps_rw(state->bs, &local_err) < 0) { + /* + * This is not fatal, bitmaps just left read-only, so all following + * writes will fail. User can remove read-only bitmaps to unblock + * writes or retry reopen. + */ + error_reportf_err(local_err, + "%s: Failed to make dirty bitmaps writable: ", + bdrv_get_node_name(state->bs)); + } + } g_free(state->opaque); } @@ -5262,7 +5276,6 @@ BlockDriver bdrv_qcow2 = { .bdrv_detach_aio_context = qcow2_detach_aio_context, .bdrv_attach_aio_context = qcow2_attach_aio_context, - .bdrv_reopen_bitmaps_rw = qcow2_reopen_bitmaps_rw, .bdrv_can_store_new_dirty_bitmap = qcow2_can_store_new_dirty_bitmap, .bdrv_remove_persistent_dirty_bitmap = qcow2_remove_persistent_dirty_bitmap, }; -- 2.21.0