From patchwork Fri Jul 17 10:54:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 277761 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=-9.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS autolearn=unavailable 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 67E3CC433E4 for ; Fri, 17 Jul 2020 10:56:13 +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 31D1320717 for ; Fri, 17 Jul 2020 10:56:13 +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="dRAAqnD8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 31D1320717 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]:54918 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jwO2G-0003xz-AO for qemu-devel@archiver.kernel.org; Fri, 17 Jul 2020 06:56:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44856) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jwO0j-0001DD-Qv for qemu-devel@nongnu.org; Fri, 17 Jul 2020 06:54:37 -0400 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:39643 helo=us-smtp-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 1jwO0g-0004QB-HA for qemu-devel@nongnu.org; Fri, 17 Jul 2020 06:54:37 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1594983273; 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=5q8KKnBbLZd3LytN1YBSNWa8Cu5XHVk6GiVEfo4dW5M=; b=dRAAqnD8hR1GOc+PcawLxRik9WnyrmQgNrmSO5F+5HJOKRWqAIRK5QGHTHqq/BroQ6qGTe twFX1Uqsu9rpfKJOA4PvemsR/+BGevowjIXFnWcGZxuJFYPKcwSH9Lwf+fgPlqZyaq5xyS v5vUIK1BhY74A2oXQv6jSSvu3o0XJ9g= 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-393-NxG8R6hEOfaiM5XWk0SU5A-1; Fri, 17 Jul 2020 06:54:32 -0400 X-MC-Unique: NxG8R6hEOfaiM5XWk0SU5A-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 159F38015CE; Fri, 17 Jul 2020 10:54:31 +0000 (UTC) Received: from linux.fritz.box.com (ovpn-113-80.ams2.redhat.com [10.36.113.80]) by smtp.corp.redhat.com (Postfix) with ESMTP id EFF8075554; Fri, 17 Jul 2020 10:54:29 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH for-5.1 1/3] file-posix: Move check_hdev_writable() up Date: Fri, 17 Jul 2020 12:54:24 +0200 Message-Id: <20200717105426.51134-2-kwolf@redhat.com> In-Reply-To: <20200717105426.51134-1-kwolf@redhat.com> References: <20200717105426.51134-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=207.211.31.120; envelope-from=kwolf@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/17 03:33:51 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, 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_H2=-1, 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: kwolf@redhat.com, qemu-devel@nongnu.org, mreitz@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We'll need to call it in raw_open_common(), so move the function to avoid a forward declaration. Signed-off-by: Kevin Wolf --- block/file-posix.c | 66 +++++++++++++++++++++++----------------------- 1 file changed, 33 insertions(+), 33 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index 8067e238cb..e35e15185a 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -401,6 +401,39 @@ static void raw_probe_alignment(BlockDriverState *bs, int fd, Error **errp) } } +static int check_hdev_writable(BDRVRawState *s) +{ +#if defined(BLKROGET) + /* Linux block devices can be configured "read-only" using blockdev(8). + * This is independent of device node permissions and therefore open(2) + * with O_RDWR succeeds. Actual writes fail with EPERM. + * + * bdrv_open() is supposed to fail if the disk is read-only. Explicitly + * check for read-only block devices so that Linux block devices behave + * properly. + */ + struct stat st; + int readonly = 0; + + if (fstat(s->fd, &st)) { + return -errno; + } + + if (!S_ISBLK(st.st_mode)) { + return 0; + } + + if (ioctl(s->fd, BLKROGET, &readonly) < 0) { + return -errno; + } + + if (readonly) { + return -EACCES; + } +#endif /* defined(BLKROGET) */ + return 0; +} + static void raw_parse_flags(int bdrv_flags, int *open_flags, bool has_writers) { bool read_write = false; @@ -3299,39 +3332,6 @@ static int hdev_probe_device(const char *filename) return 0; } -static int check_hdev_writable(BDRVRawState *s) -{ -#if defined(BLKROGET) - /* Linux block devices can be configured "read-only" using blockdev(8). - * This is independent of device node permissions and therefore open(2) - * with O_RDWR succeeds. Actual writes fail with EPERM. - * - * bdrv_open() is supposed to fail if the disk is read-only. Explicitly - * check for read-only block devices so that Linux block devices behave - * properly. - */ - struct stat st; - int readonly = 0; - - if (fstat(s->fd, &st)) { - return -errno; - } - - if (!S_ISBLK(st.st_mode)) { - return 0; - } - - if (ioctl(s->fd, BLKROGET, &readonly) < 0) { - return -errno; - } - - if (readonly) { - return -EACCES; - } -#endif /* defined(BLKROGET) */ - return 0; -} - static void hdev_parse_filename(const char *filename, QDict *options, Error **errp) {