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 EB0E4C433EF for ; Tue, 1 Mar 2022 18:42:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237005AbiCASna (ORCPT ); Tue, 1 Mar 2022 13:43:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51210 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235033AbiCASn0 (ORCPT ); Tue, 1 Mar 2022 13:43:26 -0500 Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B00ED6355; Tue, 1 Mar 2022 10:42:44 -0800 (PST) Received: by mail-wr1-x435.google.com with SMTP id r10so21971325wrp.3; Tue, 01 Mar 2022 10:42:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=IbkBPOZHxyDhwbYI6C6WAbl6xgULu/qJuZj2bKD1dnc=; b=q6I+c6zPqDZ8NcQLkf2WIiIpNUtokW2SnfWmoxsQtHH1NYB4fdx/G3iRmuDL0br88e P3NYZiRu8ofeYfhBtpgG9eyK7q93yPoU+d/zk2CfLQq5sN35j1gQnJ19wklGrUJeobtQ aHIDB1cOwfjCae2g/VPWuFl9Xn8ZMVl5jigrtPMaoYOlsF/L5zWRwq9CcYMD1AFdOFCq K7Z4oAF4MJ1M5Ub0FdyT9RwcUV+s/0mD9kpZBFgOY+P7/7rHQ7sCPla6ng/Hqg3P3J0C 8E4MYAyiZwMA7YrPeo9/Trs0FRuax9lcHQEHR3RtL//S2iAAiN9XQ1C5RlDKzdna23g/ ml6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=IbkBPOZHxyDhwbYI6C6WAbl6xgULu/qJuZj2bKD1dnc=; b=nBGCZrNR+HNeNJL6/5PVh5WSqsUSUWDbscRC4RuWK8sVCSP5SYCc3zAXv8NMg4LjLd kfKZfM9LXOC6OQgYOCDDZxdDlyOX4fJg+F4cFvPDAYPKm1E1Mm26LBB4RDF3qabSaOmh x8LVBBKSmOwF+BkQc5Le42ZvVql1B4eDy+4WRrAUwlH5YJPnnKGZlRfQ4A1hkNXgbNrZ mUAMaoTeUYiW6Q01VLPkGpxDpJ8tiilOaPlMAPIQesCfvwq4Cag3fDDoZR/iG0W+ZQgM vZfKOHr2bq9JU6Y6nz3XrPvF/Kk3puKuQRAAlV/Zy5jbDNdJmJMbB6dBzOnwUZRKxHfh kNGw== X-Gm-Message-State: AOAM531nQRTAIx47A7pCl5gZJwnPaBZdysDOOr0h5DBVScQLqOc0lY3Q iuiZrCtkjVrcjR+2i56CYzw= X-Google-Smtp-Source: ABdhPJybUxlu+Sr/K1q/+6lGsklHkTQSyTz+hFA4ND4TtDdWCZL+Q8J/MifE8UeM2Ciewr/V58MU+w== X-Received: by 2002:a05:6000:1864:b0:1ef:d2b0:560a with SMTP id d4-20020a056000186400b001efd2b0560amr8493910wri.38.1646160163271; Tue, 01 Mar 2022 10:42:43 -0800 (PST) Received: from localhost.localdomain ([77.137.71.203]) by smtp.gmail.com with ESMTPSA id f1-20020a5d4dc1000000b001eeadc98c0csm14020381wru.101.2022.03.01.10.42.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Mar 2022 10:42:42 -0800 (PST) From: Amir Goldstein To: Miklos Szeredi Cc: Dave Chinner , Al Viro , linux-unionfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v3 5/6] ovl: opt-in for per-sb io stats Date: Tue, 1 Mar 2022 20:42:20 +0200 Message-Id: <20220301184221.371853-6-amir73il@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220301184221.371853-1-amir73il@gmail.com> References: <20220301184221.371853-1-amir73il@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-unionfs@vger.kernel.org Traditionally, system administrators have used the iostat utility to track the amount of io performed to a local disk filesystem. Similar functionality is provided for NFS mounts via the nfsstat utility that reads the NFS client's stats from /proc/pid/mountstats. There is currently no good way for a system administrator or a monitoring application inside a container to track the amount of io performed via overlayfs. Opt-in for generic io stats via /proc/pid/mountstats to provide that functionality. This feature depends on CONFIG_FS_IOSTATS. Signed-off-by: Amir Goldstein --- fs/overlayfs/super.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 7bb0a47cb615..94ab6adebe07 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -6,6 +6,7 @@ #include #include +#include #include #include #include @@ -1979,6 +1980,10 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent) sb->s_d_op = &ovl_dentry_operations; + err = sb_iostats_init(sb); + if (err && err != -EOPNOTSUPP) + goto out; + err = -ENOMEM; ofs = kzalloc(sizeof(struct ovl_fs), GFP_KERNEL); if (!ofs) -- 2.25.1