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id 727CE61187; Wed, 30 Aug 2023 00:49:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 15649C433C8; Wed, 30 Aug 2023 00:48:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1693356547; bh=Y6mimTT4f5bHTNOgMAPJs7UzoDd9JcRrnEgta8s7/7g=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=R2eMjMGcVP6twJXzPd3GjCC/QAkoBXyIXwyF0PetiX1VDQJtkSU/FrVUdLPhlHeJk dBHqNW4EShjtZaWh7sFQvaiUl3mq77UH9KDN3DI2snJ6o1c+81N9JuEjNxovdv+bSx sgcIB4JoE+RW7C4bNpHemTP/NmKBpTL7+v/S4iHTHVlduZjb2wd1jti+ZtvOSZrtwV l+HJJMf2BwuQ5fHlwOGaHAX0BTHl6xVSRaJy3EeRODk9yD0xK9grM4eFB73+9nNR6U SUPRRhBT9hKA3cHo92ct+4AiPcoeZ/GYLow2fGYu2g/oM5lHg/5skk6mbUINrwlVsy FRJBQs41w8qcA== Message-ID: Subject: Re: [PATCH v2 08/92] fs: new helper: simple_rename_timestamp From: Jeff Layton To: Al Viro Cc: jk@ozlabs.org, arnd@arndb.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, 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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@lists.linux.dev, 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 Date: Tue, 29 Aug 2023 20:48:48 -0400 In-Reply-To: <20230830001917.GC461907@ZenIV> References: <20230705185812.579118-1-jlayton@kernel.org> <20230705185812.579118-3-jlayton@kernel.org> <20230830001917.GC461907@ZenIV> User-Agent: Evolution 3.48.4 (3.48.4-1.fc38) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230829_174909_669532_29B2720A X-CRM114-Status: GOOD ( 12.48 ) X-Mailman-Approved-At: Sat, 09 Sep 2023 09:42:19 -0700 X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-um" Errors-To: linux-um-bounces+linux-um=archiver.kernel.org@lists.infradead.org On Wed, 2023-08-30 at 01:19 +0100, Al Viro wrote: > On Wed, Jul 05, 2023 at 02:58:11PM -0400, Jeff Layton wrote: > > > + * POSIX mandates that the old and new parent directories have their ctime and > > + * mtime updated, and that inodes of @old_dentry and @new_dentry (if any), have > > + * their ctime updated. > > APPLICATION USAGE > Some implementations mark for update the last file status change timestamp > of renamed files and some do not. Applications which make use of the > last file status change timestamp may behave differently with respect > to renamed files unless they are designed to allow for either behavior. > > So for children POSIX permits rather than mandates. Doesn't really matter; > Linux behaviour had been to touch ctime on children since way back, if > not since the very beginning. Mea culpa. You're quite correct. I'll plan to roll a small patch to update the comment over this function. Thanks! -- Jeff Layton _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um