From patchwork Wed Jun 21 14:45:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 1798083 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=DW9+xZXP; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4QmXWK0jYLz20Xg for ; Thu, 22 Jun 2023 04:45:33 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=DW9+xZXP; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4QmXWJ6gQCz3cXQ for ; Thu, 22 Jun 2023 04:45:32 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=DW9+xZXP; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=2604:1380:4641:c500::1; helo=dfw.source.kernel.org; envelope-from=jlayton@kernel.org; receiver=lists.ozlabs.org) Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4QmRBg23yFz3038; Thu, 22 Jun 2023 00:45:47 +1000 (AEST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 85AC961587; Wed, 21 Jun 2023 14:45:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 89BA8C43140; Wed, 21 Jun 2023 14:45:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1687358744; bh=QciNdEX/PyL764MrYn7o3dC/r/b/XxL6Z8WOkZZO2JI=; h=From:To:Subject:Date:In-Reply-To:References:From; b=DW9+xZXPreiGHhWDzQhz3WX3mGR/hoBV4BdoUSGdAv1SFIQY2OlFGsFXe5YTCbCFz BR15LO6X+8VOz4uI3dADGbD0uhm8s2+O+4j7MgHyXZKIB90uQDbsYuepPjRyFF3B0B 2S88vZc4u+0i13yohGMjh5aUO1xiGWGRa8WmDwIn7xIa6Wp2KMcljJfg3hIVIsXtwI PnOnQteXv2+zJ1j2KyYyBXTgj5whBFg1lvMWJyIj6Iu0U45Bl7KlDPY9zxLJTnkEzM WVhRqOkZnv8t+Jqrh38ZBCXmUl4Pasq/CpzYkhAM57nQJPwjZQCbu6T7NzstnyDGUj O9Kd+RU2DNxhA== From: Jeff Layton To: Jeremy Kerr , Arnd Bergmann , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Greg Kroah-Hartman , =?utf-8?q?Arve_Hj=C3=B8nne?= =?utf-8?q?v=C3=A5g?= , Todd Kjos , Martijn Coenen , Joel Fernandes , Christian Brauner , Carlos Llamas , Suren Baghdasaryan , Dennis Dalessandro , Jason Gunthorpe , Leon Romanovsky , Brad Warrum , Ritu Agarwal , Eric Van Hensbergen , Latchesar Ionkov , Dominique Martinet , Christian Schoenebeck , David Sterba , David Howells , Marc Dionne , Alexander Viro , Ian Kent , Luis de Bethencourt , Salah Triki , "Tigran A. Aivazian" , Eric Biederman , Kees Cook , Chris Mason , Josef Bacik , Xiubo Li , Ilya Dryomov , Jan Harkes , coda@cs.cmu.edu, Joel Becker , Christoph Hellwig , Nicolas Pitre , "Rafael J. Wysocki" , Tyler Hicks , Ard Biesheuvel , Gao Xiang , Chao Yu , Yue Hu , Jeffle Xu , Namjae Jeon , Sungjong Seo , Jan Kara , "Theodore Ts'o" , Andreas Dilger , Jaegeuk Kim , OGAWA Hirofumi , Miklos Szeredi , Bob Peterson , Andreas Gruenbacher , Richard Weinberger , Anton Ivanov , Johannes Berg , Mikulas Patocka , Mike Kravetz , Muchun Song , David Woodhouse , Dave Kleikamp , Tejun Heo , Trond Myklebust , Anna Schumaker , Chuck Lever , Ryusuke Konishi , Anton Altaparmakov , Konstantin Komarov , Mark Fasheh , Joseph Qi , Bob Copeland , Mike Marshall , Martin Brandenburg , Luis Chamberlain , Iurii Zaikin , Tony Luck , "Guilherme G. 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Hallyn" , Stephen Smalley , Eric Paris , Juergen Gross , Ruihan Li , Laurent Pinchart , Wolfram Sang , Udipto Goswami , Linyu Yuan , John Keeping , Andrzej Pietrasiewicz , Dan Carpenter , Yuta Hayama , Jozef Martiniak , Jens Axboe , Alan Stern , Sandeep Dhavale , Dave Chinner , Johannes Weiner , ZhangPeng , Viacheslav Dubeyko , Tetsuo Handa , Aditya Garg , Erez Zadok , Yifei Liu , Yu Zhe , "Matthew Wilcox (Oracle)" , Oleg Kanatov , "Dr. David Alan Gilbert" , Jiangshan Yi , xu xin , Stefan Roesch , Zhihao Cheng , "Liam R. Howlett" , Alexey Dobriyan , Minghao Chi , Seth Forshee , Zeng Jingxiang , Bart Van Assche , Mimi Zohar , Roberto Sassu , Zhang Yi , Tom Rix , "Fabio M. De Francesco" , Chen Zhongjin , Zhengchao Shao , Rik van Riel , Jingyu Wang , Hangyu Hua , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, linux-rdma@vger.kernel.org, linux-usb@vger.kernel.org, v9fs@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-afs@lists.infradead.org, autofs@vger.kernel.org, linux-mm@kvack.org, linux-btrfs@vger.kernel.org, ceph-devel@vger.kernel.org, codalist@coda.cs.cmu.edu, ecryptfs@vger.kernel.org, linux-efi@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-um@lists.infradead.org, linux-mtd@lists.infradead.org, jfs-discussion@lists.sourceforge.net, linux-nfs@vger.kernel.org, linux-nilfs@vger.kernel.org, linux-ntfs-dev@lists.sourceforge.net, ntfs3@lists.linux.dev, ocfs2-devel@oss.oracle.com, linux-karma-devel@lists.sourceforge.net, devel@lists.orangefs.org, linux-unionfs@vger.kernel.org, linux-hardening@vger.kernel.org, reiserfs-devel@vger.kernel.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-trace-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, bpf@vger.kernel.org, netdev@vger.kernel.org, apparmor@lists.ubuntu.com, linux-security-module@vger.kernel.org, selinux@vger.kernel.org Subject: [PATCH 01/79] fs: add ctime accessors infrastructure Date: Wed, 21 Jun 2023 10:45:06 -0400 Message-ID: <20230621144507.55591-2-jlayton@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230621144507.55591-1-jlayton@kernel.org> References: <20230621144507.55591-1-jlayton@kernel.org> MIME-Version: 1.0 X-Mailman-Approved-At: Thu, 22 Jun 2023 04:32:35 +1000 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" struct timespec64 has unused bits in the tv_nsec field that can be used for other purposes. In future patches, we're going to change how the inode->i_ctime is accessed in certain inodes in order to make use of them. In order to do that safely though, we'll need to eradicate raw accesses of the inode->i_ctime field from the kernel. Add new accessor functions for the ctime that we can use to replace them. Signed-off-by: Jeff Layton Reviewed-by: Jan Kara Acked-by: Tom Talpey Reviewed-by: Luis Chamberlain --- fs/inode.c | 16 ++++++++++++++ include/linux/fs.h | 53 +++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 68 insertions(+), 1 deletion(-) diff --git a/fs/inode.c b/fs/inode.c index d37fad91c8da..c005e7328fbb 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -2499,6 +2499,22 @@ struct timespec64 current_time(struct inode *inode) } EXPORT_SYMBOL(current_time); +/** + * inode_ctime_set_current - set the ctime to current_time + * @inode: inode + * + * Set the inode->i_ctime to the current value for the inode. Returns + * the current value that was assigned to i_ctime. + */ +struct timespec64 inode_ctime_set_current(struct inode *inode) +{ + struct timespec64 now = current_time(inode); + + inode_set_ctime(inode, now); + return now; +} +EXPORT_SYMBOL(inode_ctime_set_current); + /** * in_group_or_capable - check whether caller is CAP_FSETID privileged * @idmap: idmap of the mount @inode was found from diff --git a/include/linux/fs.h b/include/linux/fs.h index 6867512907d6..9afb30606373 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1474,7 +1474,58 @@ static inline bool fsuidgid_has_mapping(struct super_block *sb, kgid_has_mapping(fs_userns, kgid); } -extern struct timespec64 current_time(struct inode *inode); +struct timespec64 current_time(struct inode *inode); +struct timespec64 inode_ctime_set_current(struct inode *inode); + +/** + * inode_ctime_peek - fetch the current ctime from the inode + * @inode: inode from which to fetch ctime + * + * Grab the current ctime from the inode and return it. + */ +static inline struct timespec64 inode_ctime_peek(const struct inode *inode) +{ + return inode->i_ctime; +} + +/** + * inode_ctime_set - set the ctime in the inode to the given value + * @inode: inode in which to set the ctime + * @ts: timespec value to set the ctime + * + * Set the ctime in @inode to @ts. + */ +static inline struct timespec64 inode_ctime_set(struct inode *inode, struct timespec64 ts) +{ + inode->i_ctime = ts; + return ts; +} + +/** + * inode_ctime_set_sec - set only the tv_sec field in the inode ctime + * @inode: inode in which to set the ctime + * @sec: value to set the tv_sec field + * + * Set the sec field in the ctime. Returns @sec. + */ +static inline time64_t inode_ctime_set_sec(struct inode *inode, time64_t sec) +{ + inode->i_ctime.tv_sec = sec; + return sec; +} + +/** + * inode_ctime_set_nsec - set only the tv_nsec field in the inode ctime + * @inode: inode in which to set the ctime + * @nsec: value to set the tv_nsec field + * + * Set the nsec field in the ctime. Returns @nsec. + */ +static inline long inode_ctime_set_nsec(struct inode *inode, long nsec) +{ + inode->i_ctime.tv_nsec = nsec; + return nsec; +} /* * Snapshotting support.