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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 DB68DC43387 for ; Thu, 10 Jan 2019 17:05:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A8B8920685 for ; Thu, 10 Jan 2019 17:05:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="i5yxorjG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729197AbfAJRFK (ORCPT ); Thu, 10 Jan 2019 12:05:10 -0500 Received: from mail-wm1-f66.google.com ([209.85.128.66]:53071 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728959AbfAJRFJ (ORCPT ); Thu, 10 Jan 2019 12:05:09 -0500 Received: by mail-wm1-f66.google.com with SMTP id m1so11990964wml.2 for ; Thu, 10 Jan 2019 09:05:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=WyHRaU/VRAng0csQ6QFDoFzWZ9FQwMMiw8mjnaBs5B8=; b=i5yxorjGDy+48FOeDWJz5VxWEcOLRZxgD0649SIA5TMxZw+BI3ifetqjzR6zR5pLNA 7CvSaX6WnQqO+vGdHwAvqRVxjeyieGbbIGYLW0QQ8h8jJKd/IcR6yEx2MGTNyjan4zD5 AfYErzbF22kNwH798U6ZkpnY4o4ynPR1vP9iDjTEbElHsgbkGgEZqPxFWspYnoO0qVmw NlhLVHRJ0VTNEGr5nSNsiE17gNf9o4cL542eKX00yjJE7Ftp07jxtKtpUDZUH0gqgGPS 5QrNIBba1B8L+itejV+j94jCgR6e8/Fm89vJbogipojYuxp22hSGsgyPN17ZuboqJ1tw WmGA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=WyHRaU/VRAng0csQ6QFDoFzWZ9FQwMMiw8mjnaBs5B8=; b=aRErw/bTbz6nG2tpcozkrhpZ5xSDiMKr/4xmz5esc+IRuOsAlgJwvEKKL1bXez5vri YnHA0HXWZOaODHGwp10BphlsCP6kpW/wYa174XEk6g3cWX9wijGzw0a4pVKQukChlSZi wrBXLCLTEmESnnFTYhCX9JaMKTTQVC0VcruUjv9VHvvqm63Jk7dpy/LJ0eLIf2DqTty6 2VrUgzU43xG5ayITUk7VAEbZXKMkpL67GqSnT4fooEiUK7CWY3YqTDlTYOZuuKyDJ/c/ oCYguUkRQkyNi9l91kQwHVjr9zdD3o1yxXoJpLfJNaCaAYA8h/0iO7UnoBS2hQzL5i14 eSSw== X-Gm-Message-State: AJcUukcQbhpDFW5T2ESqlvvdRlLFccXk7N8e/3kMJDFK3ODK+izGl+5v /onoyjhBrQiXPEUlYWHUSlddWJch X-Google-Smtp-Source: ALg8bN6HOh8fYit6PRNaOkdMUK02JYm9QAn2/DzGgUmUyq5a285Neci3n/kvu4MZmYRviuq24uu4AA== X-Received: by 2002:a1c:4683:: with SMTP id t125mr2460763wma.9.1547139906849; Thu, 10 Jan 2019 09:05:06 -0800 (PST) Received: from amir-VirtualBox.ctera.local ([188.120.129.201]) by smtp.gmail.com with ESMTPSA id m4sm5725868wmi.3.2019.01.10.09.05.05 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 10 Jan 2019 09:05:06 -0800 (PST) From: Amir Goldstein To: Jan Kara Cc: Matthew Bobrowski , linux-fsdevel@vger.kernel.org, Al Viro Subject: [PATCH v5 11/17] vfs: add vfs_get_fsid() helper Date: Thu, 10 Jan 2019 19:04:38 +0200 Message-Id: <20190110170444.30616-12-amir73il@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190110170444.30616-1-amir73il@gmail.com> References: <20190110170444.30616-1-amir73il@gmail.com> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Wrapper around statfs() interface. Cc: Al Viro Signed-off-by: Amir Goldstein --- fs/statfs.c | 14 ++++++++++++++ include/linux/statfs.h | 3 +++ 2 files changed, 17 insertions(+) diff --git a/fs/statfs.c b/fs/statfs.c index f0216629621d..eea7af6f2f22 100644 --- a/fs/statfs.c +++ b/fs/statfs.c @@ -67,6 +67,20 @@ static int statfs_by_dentry(struct dentry *dentry, struct kstatfs *buf) return retval; } +int vfs_get_fsid(struct dentry *dentry, __kernel_fsid_t *fsid) +{ + struct kstatfs st; + int error; + + error = statfs_by_dentry(dentry, &st); + if (error) + return error; + + *fsid = st.f_fsid; + return 0; +} +EXPORT_SYMBOL(vfs_get_fsid); + int vfs_statfs(const struct path *path, struct kstatfs *buf) { int error; diff --git a/include/linux/statfs.h b/include/linux/statfs.h index 3142e98546ac..9bc69edb8f18 100644 --- a/include/linux/statfs.h +++ b/include/linux/statfs.h @@ -41,4 +41,7 @@ struct kstatfs { #define ST_NODIRATIME 0x0800 /* do not update directory access times */ #define ST_RELATIME 0x1000 /* update atime relative to mtime/ctime */ +struct dentry; +extern int vfs_get_fsid(struct dentry *dentry, __kernel_fsid_t *fsid); + #endif -- 2.17.1