From patchwork Tue Feb 21 14:58:08 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 9584899 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 94B10600CA for ; Tue, 21 Feb 2017 15:47:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7FAA32003F for ; Tue, 21 Feb 2017 15:47:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 72C2826E4C; Tue, 21 Feb 2017 15:47:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 17A492003F for ; Tue, 21 Feb 2017 15:47:05 +0000 (UTC) Received: from localhost ([::1]:46447 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cgCef-0002g0-0Q for patchwork-qemu-devel@patchwork.kernel.org; Tue, 21 Feb 2017 10:47:05 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42723) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cgBuS-0008Eq-0X for qemu-devel@nongnu.org; Tue, 21 Feb 2017 09:59:20 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cgBuR-0007qq-76 for qemu-devel@nongnu.org; Tue, 21 Feb 2017 09:59:20 -0500 Received: from mx1.redhat.com ([209.132.183.28]:32846) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cgBuO-0007p7-Ej; Tue, 21 Feb 2017 09:59:16 -0500 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7D73F8124B; Tue, 21 Feb 2017 14:59:16 +0000 (UTC) Received: from noname.str.redhat.com (dhcp-192-197.str.redhat.com [10.33.192.197]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v1LEwucu030565; Tue, 21 Feb 2017 09:59:15 -0500 From: Kevin Wolf To: qemu-block@nongnu.org Date: Tue, 21 Feb 2017 15:58:08 +0100 Message-Id: <1487689130-30373-13-git-send-email-kwolf@redhat.com> In-Reply-To: <1487689130-30373-1-git-send-email-kwolf@redhat.com> References: <1487689130-30373-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Tue, 21 Feb 2017 14:59:16 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 12/54] block: Add op blocker permission constants X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, jcody@redhat.com, famz@redhat.com, qemu-devel@nongnu.org, mreitz@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This patch defines the permission categories that will be used by the new op blocker system. Signed-off-by: Kevin Wolf Reviewed-by: Max Reitz --- include/block/block.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/include/block/block.h b/include/block/block.h index bde5ebd..ac40c8d 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -187,6 +187,41 @@ typedef enum BlockOpType { BLOCK_OP_TYPE_MAX, } BlockOpType; +/* Block node permission constants */ +enum { + /** + * A user that has the "permission" of consistent reads is guaranteed that + * their view of the contents of the block device is complete and + * self-consistent, repesenting the contents of a disk at a specific point. + * + * For most block devices (including their backing files) this is true, but + * the property cannot be maintained in a few situations like for + * intermediate nodes of a commit block job. + */ + BLK_PERM_CONSISTENT_READ = 0x01, + + /** This permission is required to change the visible disk contents. */ + BLK_PERM_WRITE = 0x02, + + /** + * This permission (which is weaker than BLK_PERM_WRITE) is both enough and + * required for writes to the block node when the caller promises that + * this visible disk contents doesn't change. + */ + BLK_PERM_WRITE_UNCHANGED = 0x04, + + /** This permission is required to change the size of a block node. */ + BLK_PERM_RESIZE = 0x08, + + /** + * This permission is required to change the node that this BdrvChild + * points to. + */ + BLK_PERM_GRAPH_MOD = 0x10, + + BLK_PERM_ALL = 0x1f, +}; + /* disk I/O throttling */ void bdrv_init(void); void bdrv_init_with_whitelist(void);