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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 271E2C4332F for ; Wed, 9 Feb 2022 06:05:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235349AbiBIGBf (ORCPT ); Wed, 9 Feb 2022 01:01:35 -0500 Received: from gmail-smtp-in.l.google.com ([23.128.96.19]:52002 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234759AbiBIGBT (ORCPT ); Wed, 9 Feb 2022 01:01:19 -0500 Received: from out30-54.freemail.mail.aliyun.com (out30-54.freemail.mail.aliyun.com [115.124.30.54]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2FAF3C050CC1; Tue, 8 Feb 2022 22:01:22 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R921e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04423;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=15;SR=0;TI=SMTPD_---0V3zaQSC_1644386479; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0V3zaQSC_1644386479) by smtp.aliyun-inc.com(127.0.0.1); Wed, 09 Feb 2022 14:01:19 +0800 From: Jeffle Xu To: dhowells@redhat.com, linux-cachefs@redhat.com, xiang@kernel.org, chao@kernel.org, linux-erofs@lists.ozlabs.org Cc: torvalds@linux-foundation.org, gregkh@linuxfoundation.org, willy@infradead.org, linux-fsdevel@vger.kernel.org, joseph.qi@linux.alibaba.com, bo.liu@linux.alibaba.com, tao.peng@linux.alibaba.com, gerry@linux.alibaba.com, eguan@linux.alibaba.com, linux-kernel@vger.kernel.org Subject: [PATCH v3 08/22] erofs: add mode checking helper Date: Wed, 9 Feb 2022 14:00:54 +0800 Message-Id: <20220209060108.43051-9-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220209060108.43051-1-jefflexu@linux.alibaba.com> References: <20220209060108.43051-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Until then erofs is exactly blockdev based filesystem. In other using scenarios (e.g. container image), erofs needs to run upon files. This patch set is going to introduces a new nodev mode, in which erofs could be mounted from a bootstrap blob file containing complete erofs image. Add a helper checking which mode erofs works in. Signed-off-by: Jeffle Xu --- fs/erofs/internal.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h index f9f94d63d40f..2b9337d385ce 100644 --- a/fs/erofs/internal.h +++ b/fs/erofs/internal.h @@ -161,6 +161,11 @@ struct erofs_sb_info { #define set_opt(opt, option) ((opt)->mount_opt |= EROFS_MOUNT_##option) #define test_opt(opt, option) ((opt)->mount_opt & EROFS_MOUNT_##option) +static inline bool erofs_bdev_mode(struct super_block *sb) +{ + return sb->s_bdev; +} + enum { EROFS_ZIP_CACHE_DISABLED, EROFS_ZIP_CACHE_READAHEAD, -- 2.27.0