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 X-Spam-Level: X-Spam-Status: No, score=-2.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 DA0C4C2D0C6 for ; Sat, 28 Dec 2019 15:56:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A18F621582 for ; Sat, 28 Dec 2019 15:56:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="l1eZV8JX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726100AbfL1P4H (ORCPT ); Sat, 28 Dec 2019 10:56:07 -0500 Received: from mail-yw1-f54.google.com ([209.85.161.54]:43575 "EHLO mail-yw1-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726080AbfL1P4H (ORCPT ); Sat, 28 Dec 2019 10:56:07 -0500 Received: by mail-yw1-f54.google.com with SMTP id v126so12409378ywc.10 for ; Sat, 28 Dec 2019 07:56:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:subject:message-id:mime-version:content-disposition :user-agent; bh=zBKriwPr9SjhrT1rbedlNBs+ksD2sfIqjCoI891MWPs=; b=l1eZV8JX2jAkH0UM26O8m3K8dBUegCacg5w3gNaT29pmc3+BdyJa7pxFCSWsKgCovT vP4KgN7D7oeb6Scpp9bgcxorOLmMk2UKogyYPK57z6YLPyF95NDiAn0DMdzxhO3vs/4U PjryuSO4H4uCqOnt5wAS2uV7mIJGQk8/+bOfMy/K2vhuOeWvjOgaclUGhrgahnqW02sY kHg0QrUeRENcCRUYLh4E9FFsrdBnvhjk7uPgtIo71eDcRSBO127PCWeXXWyJz5WEuz4B gAu82relgSiJTzIDm5jjPiZT0x0J5Xb79CRMYwlOdpcov4PS029jE7mw9rsoj+0n6FXW T4+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:subject:message-id:mime-version :content-disposition:user-agent; bh=zBKriwPr9SjhrT1rbedlNBs+ksD2sfIqjCoI891MWPs=; b=re5vWmQIxAlfLI95x0jv9wcGWG4qZAS4Fb8e7XxOfePcTVwnwXeLKBnNUhcGrYxmKO N1n9qJ5Fx7B9KQlSY+zag2st+k5FANzQ2MqoXWuSdRA4CAIi+n4JGlwA0CIGTbgpaqoF OAwjYaRVtIKXS0pdFstN2yJ9Ka4HztIbC7X7igXa+4js0uGhZ+yt5xZzXtggtYm3git5 HsBbqYvgyElmq41ZzO/eO1DF8Tv23AeqDT43agk3dOTJ3TV6y9S9qXDcudymFdKotUYU h0r/X9lJluFSQva2D4Y2KLECqbZOog2W7KAz5LYiAUb+D/JBVPLdIJ8BF6ZlK39CgJFV awGg== X-Gm-Message-State: APjAAAWmW8RQstZC8/wVl1/jNqzMvmX/GiPAuFYXGpB705kMltqNWJUr 58QwnguwB9VvClzT6ad8bwmag43PB6E= X-Google-Smtp-Source: APXvYqzZfcbEYlUedemsz8I1B0nkfg7XCAUIJd7Fup3FEzaCaHwqQ6ZU3g2bYNO9yE05NdD+l8mU3w== X-Received: by 2002:a81:a1c4:: with SMTP id y187mr40489367ywg.189.1577548566104; Sat, 28 Dec 2019 07:56:06 -0800 (PST) Received: from user-ThinkPad-X230 ([2601:cd:4005:d680:3149:3009:57c4:ce8]) by smtp.gmail.com with ESMTPSA id w128sm14576601ywf.72.2019.12.28.07.56.05 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sat, 28 Dec 2019 07:56:05 -0800 (PST) Date: Sat, 28 Dec 2019 10:55:59 -0500 From: Amir Mahdi Ghorbanian To: linux-fsdevel@vger.kernel.org Subject: flag specifications for structs Message-ID: <20191228155559.GA2115@user-ThinkPad-X230> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Hello fellow kernel hackers, I am currently considering tackling the following item from the TODO list in the drivers/staging/exfat directory: Fix (thing)->flags to not use magic numbers - multiple offenders I am having some difficulty figuring out what the flag bits of the following two structs, defined in exfat.h, mean: /* directory structure */ struct chain_t { u32 dir; s32 size; u8 flags; }; struct file_id_t { struct chain_t dir; s32 entry; u32 type; u32 attr; u32 start_clu; u64 size; u8 flags; s64 rwoffset; s32 hint_last_off; u32 hint_last_clu; }; Are the bit specifications defined somewhere in the linux kernel or online? Any guidance on how to go about figuring them out would be much appreciated.