From patchwork Tue May 12 16:50:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Shinkevich X-Patchwork-Id: 11543607 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 295F314B4 for ; Tue, 12 May 2020 16:57:57 +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 093A9206B9 for ; Tue, 12 May 2020 16:57:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 093A9206B9 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:37306 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jYYE8-00086C-6Q for patchwork-qemu-devel@patchwork.kernel.org; Tue, 12 May 2020 12:57:56 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52382) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jYY7R-0004lb-Sd; Tue, 12 May 2020 12:51:01 -0400 Received: from relay.sw.ru ([185.231.240.75]:50542) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jYY7P-0001R6-3b; Tue, 12 May 2020 12:51:00 -0400 Received: from dhcp-172-16-25-136.sw.ru ([172.16.25.136] helo=localhost.sw.ru) by relay.sw.ru with esmtp (Exim 4.92.3) (envelope-from ) id 1jYY7D-0004nT-9q; Tue, 12 May 2020 19:50:47 +0300 From: Andrey Shinkevich To: qemu-block@nongnu.org Subject: [PATCH v4 10/15] copy-on-read: Support change filename functions Date: Tue, 12 May 2020 19:50:40 +0300 Message-Id: <1589302245-893269-11-git-send-email-andrey.shinkevich@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1589302245-893269-1-git-send-email-andrey.shinkevich@virtuozzo.com> References: <1589302245-893269-1-git-send-email-andrey.shinkevich@virtuozzo.com> Received-SPF: pass client-ip=185.231.240.75; envelope-from=andrey.shinkevich@virtuozzo.com; helo=relay.sw.ru X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/12 10:53:25 X-ACL-Warn: Detected OS = Linux 3.1-3.10 X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action 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: kwolf@redhat.com, fam@euphon.net, vsementsov@virtuozzo.com, armbru@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, andrey.shinkevich@virtuozzo.com, den@openvz.org, mreitz@redhat.com, jsnow@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" The COR-filter driver should support a redirecting function to refresh filenames. Otherwise, a file name of the filter will be copied instead of the one of a data node. It is also true for the function bdrv_change_backing_file(). Signed-off-by: Andrey Shinkevich --- block/copy-on-read.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/block/copy-on-read.c b/block/copy-on-read.c index c4fa468..74e01ee 100644 --- a/block/copy-on-read.c +++ b/block/copy-on-read.c @@ -21,6 +21,7 @@ */ #include "qemu/osdep.h" +#include "qemu/cutils.h" #include "block/block_int.h" #include "qemu/module.h" @@ -128,6 +129,21 @@ static void cor_lock_medium(BlockDriverState *bs, bool locked) } +static void cor_refresh_filename(BlockDriverState *bs) +{ + pstrcpy(bs->exact_filename, sizeof(bs->exact_filename), + bs->file->bs->filename); +} + + +static int cor_change_backing_file(BlockDriverState *bs, + const char *backing_file, + const char *backing_fmt) +{ + return bdrv_change_backing_file(bs->file->bs, backing_file, backing_fmt); +} + + static BlockDriver bdrv_copy_on_read = { .format_name = "copy-on-read", @@ -146,6 +162,8 @@ static BlockDriver bdrv_copy_on_read = { .bdrv_lock_medium = cor_lock_medium, .bdrv_co_block_status = bdrv_co_block_status_from_file, + .bdrv_refresh_filename = cor_refresh_filename, + .bdrv_change_backing_file = cor_change_backing_file, .has_variable_length = true, .is_filter = true,