From patchwork Tue Jan 10 15:20:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chao Yu X-Patchwork-Id: 41516 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4e01:0:0:0:0:0 with SMTP id p1csp2808916wrt; Tue, 10 Jan 2023 07:24:26 -0800 (PST) X-Google-Smtp-Source: AMrXdXvXn2miJfB7+EqGE9ITsN/QopyES6gPwTQDFJ0wSC22P1tBW2B0w1fVxt8+xK6OnP7s15tp X-Received: by 2002:a05:6402:456:b0:484:8b49:e117 with SMTP id p22-20020a056402045600b004848b49e117mr48199442edw.3.1673364266777; Tue, 10 Jan 2023 07:24:26 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1673364266; cv=none; d=google.com; s=arc-20160816; b=mC9Fu62Z42uyHGR1T8YunlitAJwZNCuHx+GctHiescf+IZN4HHtwiADoshMwtLDhis GocXbU0Ja+TY1+yPdZ1r688o9UluePUQGOxYbVA7PwA4UbkaSXNCuj6Qz648mjSE3sU9 gUU2mM0GsGkf6e+NFolgT04WS8cN8ADx0SHohCoMsM9V24Y0BldGLGtBEvD8KxPFBEld lRtCL56MoBmqufccpMDiIilhgMxLkT/Eil4S3pBkgKftcMHdU8xQVonmX3T4CMP94j42 vMQaXGok+djtoy2n7f0R8ORh/jk60CBOvkWBqGxIvWn4hhNVtMEs1OSvvtkBLnErrSZB H2kw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from:dkim-signature; bh=FP3xPa2+AHBVHsMv/BNlPgfGY49rwu9jIPJdr9sCm9o=; b=Is1OH15d8hvp7pwjva4js9SJgmocJkytfz4cZgXWOSQrA/EeHJABp+9NDNPYPZVTPf PePSV7TLn11m2O23lgihHHTHGPUxIjixSgzmlLxZmiz6fND2mmHk8KD9QKQCvfjjdI/e D8f3h0z4vZc+wL87mUzYMkhY2GTSTCxulZzz78n5pEh5EKypob08VUmggndCW2SP8eZa 4DV0JIgaE4gz+4r3tM2lVDz1AVbDcTm/PFPZF41IK7RB9ChOFowRiFZpa6uWUmaUYhZM 8B6OfOOmxonHlrFvcfRvbsLbEmhx6zr3QjX4fdKRG+VYEZliI8+tHqcssnVgGv7yC+UG u0Ag== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=A14aw1yT; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id gb27-20020a170907961b00b0084c7e7eb6fdsi13386016ejc.131.2023.01.10.07.24.02; Tue, 10 Jan 2023 07:24:26 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=A14aw1yT; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238850AbjAJPVB (ORCPT + 99 others); Tue, 10 Jan 2023 10:21:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56720 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238958AbjAJPUh (ORCPT ); Tue, 10 Jan 2023 10:20:37 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE783714B8; Tue, 10 Jan 2023 07:20:34 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id DE7F6B81731; Tue, 10 Jan 2023 15:20:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B6D3C433EF; Tue, 10 Jan 2023 15:20:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1673364030; bh=ZcLcQ7QNnXhTOAkBBEi6YS0XdNLDkyedU2bQ3dix0z8=; h=From:To:Cc:Subject:Date:From; b=A14aw1yTqcUhUrNpI2bVbqfIxCPETmpzk7/ZGjlGMb4N6tAAoV1XcWjKg/fOHDo4U FxTp74mxzJjTooDaRzxQMEfXAds0Z7VSIMH8SVNf2FyoOjjKShbsBHcj6Q2vnBtT7J Z4o5wjo+fjG888Qt6K6Rz0aTdkWFnL8Zij4yblKJagksqbZQyXf56IYXFIMqAK8Qbl dDVXXRSTSVk9zzNfJkQi7oejSvLxriQIgu4EfLZiUpyTg297DS/ect73DJGk4vNK/p g8JCOMLpzdBs/QHcqaiYxbbwCNpmLxWVZ7DlM8W0UgoXS2bcGuH22NOtIwdF7v5Xzr JrJBiSy6A2Nzg== From: Chao Yu To: akpm@linux-foundation.org, adobriyan@gmail.com Cc: viro@zeniv.linux.org.uk, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Chao Yu Subject: [PATCH] proc: introduce proc_statfs() Date: Tue, 10 Jan 2023 23:20:03 +0800 Message-Id: <20230110152003.1118777-1-chao@kernel.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754649609547005708?= X-GMAIL-MSGID: =?utf-8?q?1754649609547005708?= Introduce proc_statfs() to replace simple_statfs(), so that f_bsize queried from statfs() can be consistent w/ the value we set in s_blocksize. stat -f /proc/ Before: ID: 0 Namelen: 255 Type: proc Block size: 4096 Fundamental block size: 4096 Blocks: Total: 0 Free: 0 Available: 0 Inodes: Total: 0 Free: 0 After: ID: 0 Namelen: 255 Type: proc Block size: 1024 Fundamental block size: 1024 Blocks: Total: 0 Free: 0 Available: 0 Inodes: Total: 0 Free: 0 Signed-off-by: Chao Yu --- fs/proc/inode.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/fs/proc/inode.c b/fs/proc/inode.c index f495fdb39151..d39e3b9b3135 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -25,6 +25,7 @@ #include #include #include +#include #include "internal.h" @@ -176,6 +177,14 @@ static inline const char *hidepid2str(enum proc_hidepid v) return "unknown"; } +static int proc_statfs(struct dentry *dentry, struct kstatfs *buf) +{ + buf->f_type = dentry->d_sb->s_magic; + buf->f_bsize = dentry->d_sb->s_blocksize; + buf->f_namelen = PROC_NAME_LEN; + return 0; +} + static int proc_show_options(struct seq_file *seq, struct dentry *root) { struct proc_fs_info *fs_info = proc_sb_info(root->d_sb); @@ -195,7 +204,7 @@ const struct super_operations proc_sops = { .free_inode = proc_free_inode, .drop_inode = generic_delete_inode, .evict_inode = proc_evict_inode, - .statfs = simple_statfs, + .statfs = proc_statfs, .show_options = proc_show_options, };