From patchwork Fri Jul 5 17:02:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 13725398 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 32B9517A92C; Fri, 5 Jul 2024 17:03:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720199001; cv=none; b=lWv76TljHy3RpBlaSW5ZvUWgAowxYU/HGyMJ0RAcZIcm0Kjb8KUpWubKcHOMJMc8OQpG3LMhFNI9CmMeoxTwb/qKfYFwf5m+0RQPFoPlOLQNaK0x7jcPqCtAvyEEtS39pyiCf/TnYjZc5LF7AsTXcLQZJoS4sFozWYJlGPIGQwE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720199001; c=relaxed/simple; bh=pHEQop1T1fiyamd9jcpDhT/4UZTaEZSdDGTRt6fHlCQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=cnlD2QER/kokYC7pIzNkpejgpxHUe6zNEq7J/fS/awVugL6ZuQ7mXoBb5oDthIsc7mFRTv3Ay8VkjXwvIcZT19P8m7G8tqIljtk+k2YFbQj02TLcrd7J9bT3E7I1tH1844w6btyc+fT6pCJJgm+7n6Skvy6mbt/g4INjDAujzhk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GIF28tq/; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="GIF28tq/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 69069C4AF07; Fri, 5 Jul 2024 17:03:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1720199000; bh=pHEQop1T1fiyamd9jcpDhT/4UZTaEZSdDGTRt6fHlCQ=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=GIF28tq/EK13s4RMBEeSAadr35rKcDq5IRamnX6pCdUp3F+CPwHJy0EA/gmZalfou 6nDCJ9rdvrdzfiZ9Lqx/ZNlKYu/E2Qa2C4xa96YCY2+X0Y2Iy0/p3taIHbI9vsvitd GCGmLULp8AGxtTjKnaYWN6c004o78XS8dz0M1yPcaUbfmtH3qwUKJ40TLysp68TwTU h7063zJs4fhYdQ2p2VXwE0vJ3vQ4IakiOzZ4jkHjufH/yAUxuYsjmL6D/EEeCLiicE TquJDQsI0jsWjpEV1da96vz8CaJCe2pj/NI/a0Yfm5WdG1CKuViVs5FJoCZ/gjtEGu fp8sXV5JVvSIA== From: Jeff Layton Date: Fri, 05 Jul 2024 13:02:43 -0400 Subject: [PATCH v3 9/9] tmpfs: add support for multigrain timestamps Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240705-mgtime-v3-9-85b2daa9b335@kernel.org> References: <20240705-mgtime-v3-0-85b2daa9b335@kernel.org> In-Reply-To: <20240705-mgtime-v3-0-85b2daa9b335@kernel.org> To: Alexander Viro , Christian Brauner , Jan Kara , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Chandan Babu R , "Darrick J. Wong" , Theodore Ts'o , Andreas Dilger , Chris Mason , Josef Bacik , David Sterba , Hugh Dickins , Andrew Morton , Jonathan Corbet Cc: Dave Chinner , Andi Kleen , Christoph Hellwig , kernel-team@fb.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-mm@kvack.org, linux-nfs@vger.kernel.org, linux-doc@vger.kernel.org, Jeff Layton X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=775; i=jlayton@kernel.org; h=from:subject:message-id; bh=pHEQop1T1fiyamd9jcpDhT/4UZTaEZSdDGTRt6fHlCQ=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBmiCc9+3lWva5fNpNEWzu+7Rzw+GWxPBkon5ZUU ZWSCd8FdEiJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCZognPQAKCRAADmhBGVaC FcQ/EACXCMgwagZgAeeTGej6ZdWdoV08xda+ukWEVKdoIUb77+9qfa7Yv3j2f/9/vUmczA20jEa pMsyqiMipIpjHb/h6QXN34WJ12LdxjE1uXpo6tCZsInC6UN2DZS9BhXeYb7ejNH9aGX2uo+Ss9l eQKtsAwT2TQVgdXIggjo30q/WL0UDdlrrNaz8TwUVCsPoC2KeveW+rJYoKLJoVkw+AC6d91L+2O nI4jEVV+3rGAmY3a9UkYPb9aaAAzUpLQaYUYnKHgfn71zVj3thfOkumCfZ69GwVT+tt/3fonV/M EAnDuUuqXuuKMpqD6+6+iJ68pd7sk1HIlFtp2RvvY+8BUdr4pZ0ty/hgbke0sRNIeLSFJxPXTjQ tAQqsdr6u7uujdhIgMen0qCwqfC21yKaJzDa2+ETo+srnwz/Zxz4UwjpYZiU/OBc3C7Cah+WE70 om/sbkLTeER/YssLnFxwJK2dAAc8Ut5jqRaV6+TL6dtDmGDzd/rVbY+9uT7yZMU4xBpCggzk837 /xiNN+jD3DNYksPSR8+nl8+3A0tWZLKIqmqHjthV2ypV8JzeqG/3h6XVp7CS123/twcsw8uF2zH T+mn6oJ7266/eKdofn/eqBog5C5KQrE5oXZvl+0FraKOGR3haAe4gkhgk++OZcAxCEUAZUtV1Jt kQ8/0xbEalSX4mA== 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 --- mm/shmem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/shmem.c b/mm/shmem.c index 440e2a9d8726..6dc817064140 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -4649,7 +4649,7 @@ static struct file_system_type shmem_fs_type = { .parameters = shmem_fs_parameters, #endif .kill_sb = kill_litter_super, - .fs_flags = FS_USERNS_MOUNT | FS_ALLOW_IDMAP, + .fs_flags = FS_USERNS_MOUNT | FS_ALLOW_IDMAP | FS_MGTIME, }; void __init shmem_init(void)