From patchwork Tue Jul 25 14:58:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 13326660 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D5AED1F17C; Tue, 25 Jul 2023 14:59:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1FE35C433BA; Tue, 25 Jul 2023 14:59:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1690297157; bh=1/8G5JaqUI6KuuI2rdJCgZt0gS2ge3CDkWe83TSi7uM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=OKVh6IhRvMPzZaUNNT/6mBAoahekKV8Su19ujYhua5dNsSJXGr2MngNtpKOYADlS5 Hcq3wM7FDUZ1AhwU5l0SkI1+lCCn8xOR0JJEjELHxkXsYQRXohxF15c8QjQl0Xm+Dp AabYaBtk81zigqO/ZNjxOWuBUbzqMLIiq+sCKRMr913CtPRA3nMy4ZQya2P+aMfBUm DfLibUhnVNjPNL0YkM5WeV2HMZF3SVAzWSiYRKfJIayN7D5eWYtRDof0ETICfcAJhP 1QdzIniwIyLPb29vjUNBQTa5/ioEZS6W4QeTzhNnSbuJelJPSwWTBbQCum2wVq78oc 3sGYY+SrEP5rg== From: Jeff Layton Date: Tue, 25 Jul 2023 10:58:17 -0400 Subject: [PATCH v6 4/7] tmpfs: add support for multigrain timestamps Precedence: bulk X-Mailing-List: v9fs@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20230725-mgctime-v6-4-a794c2b7abca@kernel.org> References: <20230725-mgctime-v6-0-a794c2b7abca@kernel.org> In-Reply-To: <20230725-mgctime-v6-0-a794c2b7abca@kernel.org> To: Eric Van Hensbergen , Latchesar Ionkov , Dominique Martinet , Christian Schoenebeck , David Howells , Marc Dionne , Chris Mason , Josef Bacik , David Sterba , Xiubo Li , Ilya Dryomov , Jan Harkes , coda@cs.cmu.edu, Tyler Hicks , 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 , Greg Kroah-Hartman , Tejun Heo , Alexander Viro , Christian Brauner , Trond Myklebust , Anna Schumaker , Konstantin Komarov , Mark Fasheh , Joel Becker , Joseph Qi , Mike Marshall , Martin Brandenburg , Luis Chamberlain , Kees Cook , Iurii Zaikin , Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Sergey Senozhatsky , Richard Weinberger , Hans de Goede , Hugh Dickins , Andrew Morton , "Darrick J. Wong" Cc: Dave Chinner , Anthony Iliopoulos , v9fs@lists.linux.dev, linux-kernel@vger.kernel.org, linux-afs@lists.infradead.org, linux-btrfs@vger.kernel.org, ceph-devel@vger.kernel.org, codalist@coda.cs.cmu.edu, ecryptfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, ntfs3@lists.linux.dev, ocfs2-devel@lists.linux.dev, devel@lists.orangefs.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-mtd@lists.infradead.org, linux-mm@kvack.org, linux-xfs@vger.kernel.org, Jeff Layton X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=769; i=jlayton@kernel.org; h=from:subject:message-id; bh=1/8G5JaqUI6KuuI2rdJCgZt0gS2ge3CDkWe83TSi7uM=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBkv+Mkeyk/syoIEMjY8h9EHJqsxQ0aWd6cS3gVn sS0hR6R/6SJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCZL/jJAAKCRAADmhBGVaC FYYkD/9ytQv3AFDwSgID22VN0gkInS/gdWOU/XMQQ111VBBi+jtoL8sLhVN5+hTN45+z+uGCwcK ELptnx+sw1zyhpa/86b54P+Vj5/WEHTeyw/CugTFYvMMoxwZw3ZF8vYg4M+6ynQZWEJf2tQTk2K tdiekC/jrc+9KjYzeRXXoAq7TsgQVc8u4/u2BW+1mdUZ98N9dl6u4nDXkARcLRI+LqNSqh9d6yO IxOufKgdLh3pGMAHW0q+fSoPiNMaAQfCgxRx5Zy5ia1ZTPZzU6Mby8JrQ1f7U5WMxcYwL5SocmN G1UQX9z0RwE31B3CXLu6imdPlx5v9rro+6PBLF3MSRTzzmiLn5NVhf3ASxqYHB88Pxb8/YrZ5Hf p/mwAO9pFriehz2pTk7gj/rsg8EUkXvtGxT5/Ud0BQecMRLtzeelj7BsIirEdqiFM+oyJieS+6R yLQRWQ90+womEnX2UOBBDcSKJ4IRMVFTxqfRtTbtj+avSSM1HsqYg0PG+ZTcD7VzonTutJSupea MDCgNVtA3BSf4FlJtanXc6obMiQXMpaMbvRF7g7ZZQQ+I6clgjwlo2maEMVCXlobjZ7og+2Vn/L zdsEdNjCGYRoIRNzoAeGM8rXQ6ra0wNwBlgnVC6G77t8+98CH+j80wmzcqQzAx9NPFqiEcsD79b 2pTWmlY/xVg/8Xw== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 Enable multigrain timestamps, which should ensure that there is an apparent change to the timestamp whenever it has been written after being actively observed via getattr. tmpfs only requires the FS_MGTIME flag. Signed-off-by: Jeff Layton Reviewed-by: Jan Kara --- mm/shmem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/shmem.c b/mm/shmem.c index 654d9a585820..b6019c905058 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -4264,7 +4264,7 @@ static struct file_system_type shmem_fs_type = { #endif .kill_sb = kill_litter_super, #ifdef CONFIG_SHMEM - .fs_flags = FS_USERNS_MOUNT | FS_ALLOW_IDMAP, + .fs_flags = FS_USERNS_MOUNT | FS_ALLOW_IDMAP | FS_MGTIME, #else .fs_flags = FS_USERNS_MOUNT, #endif