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=-6.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS 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 A38C8C83004 for ; Tue, 28 Apr 2020 20:32:13 +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 71B4421973 for ; Tue, 28 Apr 2020 20:32:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="RkAw5+iC" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 71B4421973 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:50330 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jTWto-00059j-9x for qemu-devel@archiver.kernel.org; Tue, 28 Apr 2020 16:32:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:40210) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jTWrA-0000aB-14 for qemu-devel@nongnu.org; Tue, 28 Apr 2020 16:29:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.90_1) (envelope-from ) id 1jTWr9-00067o-G9 for qemu-devel@nongnu.org; Tue, 28 Apr 2020 16:29:27 -0400 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:37555 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jTWr9-000640-1v for qemu-devel@nongnu.org; Tue, 28 Apr 2020 16:29:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1588105766; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=oR44ko9tgAkAbcKyKiOtRNeKfJpiYH4oHkf4nr0f+PY=; b=RkAw5+iCcq50/ThPyW/GoeOeAzteEnFSlR9X88FcUxwMGu0fh6Vqsj3drdmxO0gTlWLuKn p5twJHNLNaINh4dYMs+dkPOTrHdSa04SAVaTvpyulJ3T6hBiBCfY3hN3pLKU5oFAtn6jKc nqzFfO4MzAHPPMk/GPx6HQKhjlfmHZ8= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-272-N4SFO4rLOcOTLoB2ZF3zfg-1; Tue, 28 Apr 2020 16:29:21 -0400 X-MC-Unique: N4SFO4rLOcOTLoB2ZF3zfg-1 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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id BFAB9107ACF3; Tue, 28 Apr 2020 20:29:20 +0000 (UTC) Received: from blue.redhat.com (ovpn-116-80.rdu2.redhat.com [10.10.116.80]) by smtp.corp.redhat.com (Postfix) with ESMTP id BC7C55C1D4; Tue, 28 Apr 2020 20:29:19 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Subject: [PATCH 5/9] sheepdog: Support BDRV_REQ_ZERO_WRITE for truncate Date: Tue, 28 Apr 2020 15:29:01 -0500 Message-Id: <20200428202905.770727-6-eblake@redhat.com> In-Reply-To: <20200428202905.770727-1-eblake@redhat.com> References: <20200428202905.770727-1-eblake@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=205.139.110.61; envelope-from=eblake@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/04/28 02:06:42 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.61 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, Liu Yuan , "open list:Sheepdog" , qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Our .bdrv_has_zero_init_truncate always returns 1 because sheepdog always 0-fills; we can use that same knowledge to implement BDRV_REQ_ZERO_WRITE by ignoring it. Signed-off-by: Eric Blake --- block/sheepdog.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block/sheepdog.c b/block/sheepdog.c index ef0a6e743e27..26fd22c7f07d 100644 --- a/block/sheepdog.c +++ b/block/sheepdog.c @@ -1654,6 +1654,7 @@ static int sd_open(BlockDriverState *bs, QDict *optio= ns, int flags, memcpy(&s->inode, buf, sizeof(s->inode)); bs->total_sectors =3D s->inode.vdi_size / BDRV_SECTOR_SIZE; + bs->supported_truncate_flags =3D BDRV_REQ_ZERO_WRITE; pstrcpy(s->name, sizeof(s->name), vdi); qemu_co_mutex_init(&s->lock); qemu_co_mutex_init(&s->queue_lock); --=20 2.26.2