Received: by 2002:a25:8b12:0:0:0:0:0 with SMTP id i18csp2978876ybl; Mon, 19 Aug 2019 10:11:51 -0700 (PDT) X-Google-Smtp-Source: APXvYqwOa5TRLFIzHcjtHf9gIgL91+n5hKLmWsVk9vGpe618ceHD078GxHvGvrozi07lB8OTLwiA X-Received: by 2002:a17:902:543:: with SMTP id 61mr23622835plf.20.1566234711722; Mon, 19 Aug 2019 10:11:51 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1566234711; cv=none; d=google.com; s=arc-20160816; b=UJOEUoOPGrww3dFeLYCREzF4lKHeiXEUmtkOzTK+dmLDggDNr29ht0gBDezM/zDYqf R2YBdhVtMDnsyjzrL7eypPaE0jkDWgVgXtQ6WprUR8M4CqQCFBlHuBRxxp/JdP4epZFv et9ETug5NwgH01EVZx/uEkG64M8bm9sR3t0aLAG+Jvem1ZbuAhsgVzD34Oy2Ln8DwktB YzsaavuKawkUMS8DVfEE79SONlVxcazyoaiQPB1Rly6Sc2LuFbzwog9DlEeNRs1VL9A2 7lz3J9+MZuv1/m2tedB1pmztNShH5pAratmVbN5+tqQzBT0gHFP23IhGDnqube+lDJpS 1CsA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:thread-topic:thread-index :content-transfer-encoding:mime-version:subject:message-id:cc:to :from:date; bh=YKQMXthkXXSdPwHpvvRGzWB40sdEzZbqPsL+dAHZv2Q=; b=sk15yBNSdTKQmrnxbN5G1ZTISs6KJ25w37tzDm1RdKuRvxYrjYrGy7gTrffEPXOhsx FMelsg6Kw1S7YLZywd9AfZnPeNeLfs2zHQBsVY3n1gXXEbz3StfcfvF7mGxNTisQRuHX hCUMTDYRDb2mLW7JK/pyrZczwrgwKS+dwxO9ZPxClmp4dm0E+rG3W/JyFRVrFcq4ZH20 WrduPC8WT8m5/+G2oHECGMgz5MEtYr7zuvusyO/cGhQtNQbgg9tKIkEnJpU14ACV4Jmg XvrqP6SDq1iBehsMhraQU+nbb3KcUl9sE67Y8VlQ6Wmb7BXfbVYQZPsWAVwqktp6oeag 78Mw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 66si10270143plc.428.2019.08.19.10.11.37; Mon, 19 Aug 2019 10:11:51 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728079AbfHSRKh (ORCPT + 99 others); Mon, 19 Aug 2019 13:10:37 -0400 Received: from lithops.sigma-star.at ([195.201.40.130]:58618 "EHLO lithops.sigma-star.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726627AbfHSRKh (ORCPT ); Mon, 19 Aug 2019 13:10:37 -0400 Received: from localhost (localhost [127.0.0.1]) by lithops.sigma-star.at (Postfix) with ESMTP id 4E1CE6083139; Mon, 19 Aug 2019 19:10:34 +0200 (CEST) Received: from lithops.sigma-star.at ([127.0.0.1]) by localhost (lithops.sigma-star.at [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id 1PQhCAiESOU6; Mon, 19 Aug 2019 19:10:34 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by lithops.sigma-star.at (Postfix) with ESMTP id 0EF46621FCD3; Mon, 19 Aug 2019 19:10:34 +0200 (CEST) Received: from lithops.sigma-star.at ([127.0.0.1]) by localhost (lithops.sigma-star.at [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 50KLyhFl0tO2; Mon, 19 Aug 2019 19:10:33 +0200 (CEST) Received: from lithops.sigma-star.at (lithops.sigma-star.at [195.201.40.130]) by lithops.sigma-star.at (Postfix) with ESMTP id D5D506088967; Mon, 19 Aug 2019 19:10:33 +0200 (CEST) Date: Mon, 19 Aug 2019 19:10:33 +0200 (CEST) From: Richard Weinberger To: linux-erofs@lists.ozlabs.org Cc: gaoxiang25@huawei.com, linux-fsdevel@vger.kernel.org, yuchao0@huawei.com, linux-kernel Message-ID: <1323459733.69859.1566234633793.JavaMail.zimbra@nod.at> Subject: erofs: Question on unused fields in on-disk structs MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [195.201.40.130] X-Mailer: Zimbra 8.8.12_GA_3807 (ZimbraWebClient - FF60 (Linux)/8.8.12_GA_3809) Thread-Index: bPOHXV7QxwRTyFuSImcS2EHKU0x0Yw== Thread-Topic: erofs: Question on unused fields in on-disk structs Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi! struct erofs_super_block has "checksum" and "features" fields, but they are not used in the source. What is the plan for these? Same for i_checksum in erofs_inode_v1 and erofs_inode_v2. At least the "features" field in the super block is something I'd expect to be used. ...such that you can have new filesystem features in future. Thanks, //richard