From nobody Tue Feb 10 00:24:00 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1601299302; cv=none; d=zohomail.com; s=zohoarc; b=K9ULvPjtcmoxmIoyixov6/sm1DHCZpNAo2hANBzFEUHlTG0J9ZqXJJ9XuFjgfa314WF6Sz8Sh3/F0TmwoIhudKPIDoe7NK/dQvzFakVXCmdEFCnoj/Zbt5m2GMVUScJFCoAE9LbO5NOsj9Agy/IajBmVT3gSPkMoRWI4GMT6/wo= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1601299302; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:Reply-To:References:Sender:Subject:To; bh=VmX24RzSHjZ7HUHZxnYwKbw1LXqu5wvropBHqJTSrPQ=; b=dl5yTV7GScYscoeLAfoYOQhTxOsCvONqnsvpfFN/8m9c/czgzGAHAOHXTdj3H0itd7p5A43TNjfpdoN//ZnbEPQXO/YaUjRdY5n32GoUyrM7AqD6FKNxcIr/eYiu+IciSCQHTf/I6x/Vryybc8iYaofWPhiagnupzD0jQA0++4Q= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1601299302358976.4148398332677; Mon, 28 Sep 2020 06:21:42 -0700 (PDT) Received: from localhost ([::1]:56134 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kMt65-0002Wn-0Q for importer@patchew.org; Mon, 28 Sep 2020 09:21:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55758) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kMsn9-0005L9-2C; Mon, 28 Sep 2020 09:02:08 -0400 Received: from relay.sw.ru ([185.231.240.75]:58840 helo=relay3.sw.ru) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kMsn7-0000SJ-13; Mon, 28 Sep 2020 09:02:06 -0400 Received: from [172.16.25.136] (helo=localhost.sw.ru) by relay3.sw.ru with esmtp (Exim 4.94) (envelope-from ) id 1kMsmY-001tba-Fm; Mon, 28 Sep 2020 16:01:30 +0300 To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, kwolf@redhat.com, mreitz@redhat.com, stefanha@redhat.com, fam@euphon.net, jsnow@redhat.com, armbru@redhat.com, eblake@redhat.com, den@openvz.org, vsementsov@virtuozzo.com, andrey.shinkevich@virtuozzo.com Subject: [PATCH v9 4/9] copy-on-read: pass base node name to COR driver Date: Mon, 28 Sep 2020 15:59:56 +0300 Message-Id: <1601298001-774096-5-git-send-email-andrey.shinkevich@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1601298001-774096-1-git-send-email-andrey.shinkevich@virtuozzo.com> References: <1601298001-774096-1-git-send-email-andrey.shinkevich@virtuozzo.com> Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=185.231.240.75; envelope-from=andrey.shinkevich@virtuozzo.com; helo=relay3.sw.ru X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/28 09:00:28 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] 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_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Reply-to: Andrey Shinkevich From: Andrey Shinkevich via Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" To limit the guest's COR operations by the base node in the backing chain during stream job, pass the base node name to the copy-on-read driver. The rest of the functionality will be implemented in the patch that follows. Signed-off-by: Andrey Shinkevich --- block/copy-on-read.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/block/copy-on-read.c b/block/copy-on-read.c index 3c8231f..e04092f 100644 --- a/block/copy-on-read.c +++ b/block/copy-on-read.c @@ -24,19 +24,23 @@ #include "block/block_int.h" #include "qemu/module.h" #include "qapi/error.h" +#include "qapi/qmp/qerror.h" #include "qapi/qmp/qdict.h" #include "block/copy-on-read.h" =20 =20 typedef struct BDRVStateCOR { bool active; + BlockDriverState *base_bs; } BDRVStateCOR; =20 =20 static int cor_open(BlockDriverState *bs, QDict *options, int flags, Error **errp) { + BlockDriverState *base_bs =3D NULL; BDRVStateCOR *state =3D bs->opaque; + const char *base_node =3D qdict_get_try_str(options, "base"); =20 bs->file =3D bdrv_open_child(NULL, options, "file", bs, &child_of_bds, BDRV_CHILD_FILTERED | BDRV_CHILD_PRIMARY, @@ -52,7 +56,16 @@ static int cor_open(BlockDriverState *bs, QDict *options= , int flags, ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) & bs->file->bs->supported_zero_flags); =20 + if (base_node) { + qdict_del(options, "base"); + base_bs =3D bdrv_lookup_bs(NULL, base_node, errp); + if (!base_bs) { + error_setg(errp, QERR_BASE_NOT_FOUND, base_node); + return -EINVAL; + } + } state->active =3D true; + state->base_bs =3D base_bs; =20 /* * We don't need to call bdrv_child_refresh_perms() now as the permiss= ions --=20 1.8.3.1