From patchwork Fri Dec 18 15:12:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Max Reitz X-Patchwork-Id: 11982493 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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 41609C4361B for ; Fri, 18 Dec 2020 15:43:33 +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 ABD4E23B5D for ; Fri, 18 Dec 2020 15:43:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ABD4E23B5D 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]:37640 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kqHul-0003q8-I8 for qemu-devel@archiver.kernel.org; Fri, 18 Dec 2020 10:43:31 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:54360) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kqHSC-00030n-UX for qemu-devel@nongnu.org; Fri, 18 Dec 2020 10:14:01 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:45935) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kqHSB-0005bd-3W for qemu-devel@nongnu.org; Fri, 18 Dec 2020 10:14:00 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1608304438; 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=bbESsW0annaeju1lI3S5fHFEdy1nFIfky+7IOLaBTig=; b=VkrQT6wxWFIg9EwBAErX+kJ2du/zk5LlLOalq/CbgsowxIG9Vx8AlB/gPcOJrlohl/aTcl FlCXCFPR16HktGBHBrgCpHEPfBxf6cXeUmcrf6DJs3LqH8VZGdZACwh6flZ0O176tYh64N myE8/RYVeDtZAHOriG/LH6sdGPlTf8w= 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-398-UmRTWybROTm9EHgLm7eaAg-1; Fri, 18 Dec 2020 10:13:55 -0500 X-MC-Unique: UmRTWybROTm9EHgLm7eaAg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id DF6BF803620; Fri, 18 Dec 2020 15:13:54 +0000 (UTC) Received: from localhost (ovpn-114-84.ams2.redhat.com [10.36.114.84]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 84CC7648A3; Fri, 18 Dec 2020 15:13:54 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Subject: [PULL 28/30] block/nvme: Implement fake truncate() coroutine Date: Fri, 18 Dec 2020 16:12:47 +0100 Message-Id: <20201218151249.715731-29-mreitz@redhat.com> In-Reply-To: <20201218151249.715731-1-mreitz@redhat.com> References: <20201218151249.715731-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mreitz@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=mreitz@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: , Cc: Kevin Wolf , Peter Maydell , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Philippe Mathieu-Daudé NVMe drive cannot be shrunk. Since commit c80d8b06cfa we can use the @exact parameter (set to false) to return success if the block device is larger than the requested offset (even if we can not be shrunk). Use this parameter to implement the NVMe truncate() coroutine, similarly how it is done for the iscsi and file-posix drivers (see commit 82325ae5f2f "Evaluate @exact in protocol drivers"). Reported-by: Xueqiang Wei Suggested-by: Max Reitz Signed-off-by: Philippe Mathieu-Daudé Message-Id: <20201210125202.858656-1-philmd@redhat.com> Signed-off-by: Max Reitz --- block/nvme.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/block/nvme.c b/block/nvme.c index a06a188d53..5a6fbacf4a 100644 --- a/block/nvme.c +++ b/block/nvme.c @@ -1389,6 +1389,29 @@ out: } +static int coroutine_fn nvme_co_truncate(BlockDriverState *bs, int64_t offset, + bool exact, PreallocMode prealloc, + BdrvRequestFlags flags, Error **errp) +{ + int64_t cur_length; + + if (prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Unsupported preallocation mode '%s'", + PreallocMode_str(prealloc)); + return -ENOTSUP; + } + + cur_length = nvme_getlength(bs); + if (offset != cur_length && exact) { + error_setg(errp, "Cannot resize NVMe devices"); + return -ENOTSUP; + } else if (offset > cur_length) { + error_setg(errp, "Cannot grow NVMe devices"); + return -EINVAL; + } + + return 0; +} static int nvme_reopen_prepare(BDRVReopenState *reopen_state, BlockReopenQueue *queue, Error **errp) @@ -1523,6 +1546,7 @@ static BlockDriver bdrv_nvme = { .bdrv_close = nvme_close, .bdrv_getlength = nvme_getlength, .bdrv_probe_blocksizes = nvme_probe_blocksizes, + .bdrv_co_truncate = nvme_co_truncate, .bdrv_co_preadv = nvme_co_preadv, .bdrv_co_pwritev = nvme_co_pwritev,