From patchwork Fri Jun 25 14:23:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Max Reitz X-Patchwork-Id: 12345399 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 75C41C2B9F4 for ; Fri, 25 Jun 2021 14:36:00 +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 261976195F for ; Fri, 25 Jun 2021 14:36:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 261976195F 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]:44096 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lwmw2-0001La-SF for qemu-devel@archiver.kernel.org; Fri, 25 Jun 2021 10:35:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33330) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lwmjx-0006Jt-8A for qemu-devel@nongnu.org; Fri, 25 Jun 2021 10:23:29 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:33253) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lwmjt-0005T8-Fx for qemu-devel@nongnu.org; Fri, 25 Jun 2021 10:23:29 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1624631004; 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=n+yT5ZMU1XZ/9fjD7v25uVb3Bjwi4nmyO4pvaq8wz0s=; b=eMUEFteTJvYM+ZFXMBUuf4qE3aRhglrIIAU0OxJt/TB39fQD2HHUb25BRJPe/SV1q2SnhS FPChqI0l+QzLj+WhzQ1bJ0FGjxwTx3M8+wsscSmX6v1TV+gpjOpEW4WEteotmFBaGU10WW zhDXHkOh92Vd4fhHiTZcg+30zLvlxf0= 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-263-vAJ65bd0PuqXE0bC-rXqfA-1; Fri, 25 Jun 2021 10:23:23 -0400 X-MC-Unique: vAJ65bd0PuqXE0bC-rXqfA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 0524E36311; Fri, 25 Jun 2021 14:23:22 +0000 (UTC) Received: from localhost (ovpn-113-54.ams2.redhat.com [10.36.113.54]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 9E9255D9C6; Fri, 25 Jun 2021 14:23:21 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Subject: [PATCH v2 1/6] export/fuse: Pass default_permissions for mount Date: Fri, 25 Jun 2021 16:23:12 +0200 Message-Id: <20210625142317.271673-2-mreitz@redhat.com> In-Reply-To: <20210625142317.271673-1-mreitz@redhat.com> References: <20210625142317.271673-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 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=216.205.24.124; envelope-from=mreitz@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.362, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, 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 , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We do not do any permission checks in fuse_open(), so let the kernel do them. We already let fuse_getattr() report the proper UNIX permissions, so this should work the way we want. This causes a change in 308's reference output, because now opening a non-writable export with O_RDWR fails already, instead of only actually attempting to write to it. (That is an improvement.) Signed-off-by: Max Reitz --- block/export/fuse.c | 8 ++++++-- tests/qemu-iotests/308 | 3 ++- tests/qemu-iotests/308.out | 2 +- 3 files changed, 9 insertions(+), 4 deletions(-) diff --git a/block/export/fuse.c b/block/export/fuse.c index 38f74c94da..d0b88e8f80 100644 --- a/block/export/fuse.c +++ b/block/export/fuse.c @@ -153,8 +153,12 @@ static int setup_fuse_export(FuseExport *exp, const char *mountpoint, struct fuse_args fuse_args; int ret; - /* Needs to match what fuse_init() sets. Only max_read must be supplied. */ - mount_opts = g_strdup_printf("max_read=%zu", FUSE_MAX_BOUNCE_BYTES); + /* + * max_read needs to match what fuse_init() sets. + * max_write need not be supplied. + */ + mount_opts = g_strdup_printf("max_read=%zu,default_permissions", + FUSE_MAX_BOUNCE_BYTES); fuse_argv[0] = ""; /* Dummy program name */ fuse_argv[1] = "-o"; diff --git a/tests/qemu-iotests/308 b/tests/qemu-iotests/308 index f122065d0f..11c28a75f2 100755 --- a/tests/qemu-iotests/308 +++ b/tests/qemu-iotests/308 @@ -215,7 +215,8 @@ echo '=== Writable export ===' fuse_export_add 'export-mp' "'mountpoint': '$EXT_MP', 'writable': true" # Check that writing to the read-only export fails -$QEMU_IO -f raw -c 'write -P 42 1M 64k' "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -f raw -c 'write -P 42 1M 64k' "$TEST_IMG" 2>&1 \ + | _filter_qemu_io | _filter_testdir | _filter_imgfmt # But here it should work $QEMU_IO -f raw -c 'write -P 42 1M 64k' "$EXT_MP" | _filter_qemu_io diff --git a/tests/qemu-iotests/308.out b/tests/qemu-iotests/308.out index 466e7e0267..0e9420645f 100644 --- a/tests/qemu-iotests/308.out +++ b/tests/qemu-iotests/308.out @@ -91,7 +91,7 @@ virtual size: 0 B (0 bytes) 'mountpoint': 'TEST_DIR/t.IMGFMT.fuse', 'writable': true } } {"return": {}} -write failed: Permission denied +qemu-io: can't open device TEST_DIR/t.IMGFMT: Could not open 'TEST_DIR/t.IMGFMT': Permission denied wrote 65536/65536 bytes at offset 1048576 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) wrote 65536/65536 bytes at offset 1048576