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 66959CCA473 for ; Wed, 1 Jun 2022 21:04:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230458AbiFAVEc (ORCPT ); Wed, 1 Jun 2022 17:04:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230502AbiFAVE2 (ORCPT ); Wed, 1 Jun 2022 17:04:28 -0400 Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A42CF2309AD for ; Wed, 1 Jun 2022 14:04:24 -0700 (PDT) Received: from pps.filterd (m0109332.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 251I4COe010631 for ; Wed, 1 Jun 2022 14:04:23 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=facebook; bh=aWGWWAgH7Bi/du0tMMunpKLV8jXk2Gb/WQnwadv9en0=; b=ikJDvnU3N1AnSdYXSBN/z345AIkwnUQKGe2IkGtbNy90uZ7Cf+kLCIrKcZ6FqaNjrmCG +cddw22iSlX/2CtXGlL2nhyKt8o8OufEuioMQRq0ajdVR7pVyi9rfcUpkhBJxbZytFYz NVuRcI0v8lXGbKILo0lWNk2W85huBbtGMJk= Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3ge3wk4tqh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Wed, 01 Jun 2022 14:04:23 -0700 Received: from twshared5413.23.frc3.facebook.com (2620:10d:c085:208::11) by mail.thefacebook.com (2620:10d:c085:11d::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Wed, 1 Jun 2022 14:04:22 -0700 Received: by devvm225.atn0.facebook.com (Postfix, from userid 425415) id E813DFEB23A7; Wed, 1 Jun 2022 14:01:42 -0700 (PDT) From: Stefan Roesch To: , , , , CC: , , , , Subject: [PATCH v7 09/15] fs: Split off inode_needs_update_time and __file_update_time Date: Wed, 1 Jun 2022 14:01:35 -0700 Message-ID: <20220601210141.3773402-10-shr@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220601210141.3773402-1-shr@fb.com> References: <20220601210141.3773402-1-shr@fb.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-GUID: t_kNE_BiXa0zyJnXW4VmJ8kqaJd2c_XU X-Proofpoint-ORIG-GUID: t_kNE_BiXa0zyJnXW4VmJ8kqaJd2c_XU X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.517,FMLib:17.11.64.514 definitions=2022-06-01_08,2022-06-01_01,2022-02-23_01 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This splits off the functions inode_needs_update_time() and __file_update_time() from the function file_update_time(). This is required to support async buffered writes. No intended functional changes in this patch. Signed-off-by: Stefan Roesch --- fs/inode.c | 76 +++++++++++++++++++++++++++++++++++------------------- 1 file changed, 50 insertions(+), 26 deletions(-) diff --git a/fs/inode.c b/fs/inode.c index ac1cf5aa78c8..c44573a32c6a 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -2049,35 +2049,18 @@ int file_remove_privs(struct file *file) } EXPORT_SYMBOL(file_remove_privs); =20 -/** - * file_update_time - update mtime and ctime time - * @file: file accessed - * - * Update the mtime and ctime members of an inode and mark the inode - * for writeback. Note that this function is meant exclusively for - * usage in the file write path of filesystems, and filesystems may - * choose to explicitly ignore update via this function with the - * S_NOCMTIME inode flag, e.g. for network filesystem where these - * timestamps are handled by the server. This can return an error for - * file systems who need to allocate space in order to update an inode. - */ - -int file_update_time(struct file *file) +static int inode_needs_update_time(struct inode *inode, struct timespec6= 4 *now) { - struct inode *inode =3D file_inode(file); - struct timespec64 now; int sync_it =3D 0; - int ret; =20 /* First try to exhaust all avenues to not sync */ if (IS_NOCMTIME(inode)) return 0; =20 - now =3D current_time(inode); - if (!timespec64_equal(&inode->i_mtime, &now)) + if (!timespec64_equal(&inode->i_mtime, now)) sync_it =3D S_MTIME; =20 - if (!timespec64_equal(&inode->i_ctime, &now)) + if (!timespec64_equal(&inode->i_ctime, now)) sync_it |=3D S_CTIME; =20 if (IS_I_VERSION(inode) && inode_iversion_need_inc(inode)) @@ -2086,15 +2069,50 @@ int file_update_time(struct file *file) if (!sync_it) return 0; =20 - /* Finally allowed to write? Takes lock. */ - if (__mnt_want_write_file(file)) - return 0; + return sync_it; +} + +static int __file_update_time(struct file *file, struct timespec64 *now, + int sync_mode) +{ + int ret =3D 0; + struct inode *inode =3D file_inode(file); =20 - ret =3D inode_update_time(inode, &now, sync_it); - __mnt_drop_write_file(file); + /* try to update time settings */ + if (!__mnt_want_write_file(file)) { + ret =3D inode_update_time(inode, now, sync_mode); + __mnt_drop_write_file(file); + } =20 return ret; } + + /** + * file_update_time - update mtime and ctime time + * @file: file accessed + * + * Update the mtime and ctime members of an inode and mark the inode fo= r + * writeback. Note that this function is meant exclusively for usage in + * the file write path of filesystems, and filesystems may choose to + * explicitly ignore updates via this function with the _NOCMTIME inode + * flag, e.g. for network filesystem where these imestamps are handled + * by the server. This can return an error for file systems who need to + * allocate space in order to update an inode. + * + * Return: 0 on success, negative errno on failure. + */ +int file_update_time(struct file *file) +{ + int ret; + struct inode *inode =3D file_inode(file); + struct timespec64 now =3D current_time(inode); + + ret =3D inode_needs_update_time(inode, &now); + if (ret <=3D 0) + return ret; + + return __file_update_time(file, &now, ret); +} EXPORT_SYMBOL(file_update_time); =20 /** @@ -2111,6 +2129,8 @@ EXPORT_SYMBOL(file_update_time); int file_modified(struct file *file) { int ret; + struct inode *inode =3D file_inode(file); + struct timespec64 now =3D current_time(inode); =20 /* * Clear the security bits if the process is not being run by root. @@ -2123,7 +2143,11 @@ int file_modified(struct file *file) if (unlikely(file->f_mode & FMODE_NOCMTIME)) return 0; =20 - return file_update_time(file); + ret =3D inode_needs_update_time(inode, &now); + if (ret <=3D 0) + return ret; + + return __file_update_time(file, &now, ret); } EXPORT_SYMBOL(file_modified); =20 --=20 2.30.2