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 X-Spam-Level: X-Spam-Status: No, score=-16.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8F336C47097 for ; Thu, 3 Jun 2021 17:54:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 75F4A613E7 for ; Thu, 3 Jun 2021 17:54:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229982AbhFCRzQ (ORCPT ); Thu, 3 Jun 2021 13:55:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:44716 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229791AbhFCRzO (ORCPT ); Thu, 3 Jun 2021 13:55:14 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2D15B61361; Thu, 3 Jun 2021 17:53:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622742808; bh=pDpZsiO18U3DpgGBUoBUjRv/wLt0NlND3MIarXRGoV8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Nwq9nSiBoW/Ze1Swd6Tze6bxP2LUM0bNiB/4j4SsGplCWyCz0W07OoZxwumPGWpmj a/5GEzYZlV1zEcE9SNyZM7R2phDc3sJr8ot1yiMrH5itbqzcCKMxO2nwxbvniRpd+a hPhTNUWTFCMx1j6PouGjKjegEdhy0FhFqXbLrDj4x5Btx/vc9Fa0VtcGIt1ab8E1wT 6yJPd6knHT/lU0r03vKdBq8MwU5neM1v9paHSM8Yw2A1kwNsHLajxDWIvOXiEh8deQ 7lPSbN5EVpr8S/jnQdyRhKF/+IRyXdDwba/EjroEcrfGU5+k7I8WewYIg3yfxacIWW 5g0qh3/z0pyMQ== Date: Thu, 3 Jun 2021 10:53:26 -0700 From: Jaegeuk Kim To: Greg KH Cc: Daniel Rosenberg , Chao Yu , linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Gabriel Krisman Bertazi , kernel-team@android.com, stable@vger.kernel.org Subject: Re: [PATCH v2 2/2] f2fs: Advertise encrypted casefolding in sysfs Message-ID: References: <20210603095038.314949-1-drosen@google.com> <20210603095038.314949-3-drosen@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/03, Greg KH wrote: > On Thu, Jun 03, 2021 at 08:40:24AM -0700, Jaegeuk Kim wrote: > > On 06/03, Greg KH wrote: > > > On Thu, Jun 03, 2021 at 09:50:38AM +0000, Daniel Rosenberg wrote: > > > > Older kernels don't support encryption with casefolding. This adds > > > > the sysfs entry encrypted_casefold to show support for those combined > > > > features. Support for this feature was originally added by > > > > commit 7ad08a58bf67 ("f2fs: Handle casefolding with Encryption") > > > > > > > > Fixes: 7ad08a58bf67 ("f2fs: Handle casefolding with Encryption") > > > > Cc: stable@vger.kernel.org # v5.11+ > > > > Signed-off-by: Daniel Rosenberg > > > > --- > > > > fs/f2fs/sysfs.c | 15 +++++++++++++-- > > > > 1 file changed, 13 insertions(+), 2 deletions(-) > > > > > > > > diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c > > > > index 09e3f258eb52..6604291a3cdf 100644 > > > > --- a/fs/f2fs/sysfs.c > > > > +++ b/fs/f2fs/sysfs.c > > > > @@ -161,6 +161,9 @@ static ssize_t features_show(struct f2fs_attr *a, > > > > if (f2fs_sb_has_compression(sbi)) > > > > len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", > > > > len ? ", " : "", "compression"); > > > > + if (f2fs_sb_has_casefold(sbi) && f2fs_sb_has_encrypt(sbi)) > > > > + len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", > > > > + len ? ", " : "", "encrypted_casefold"); > > > > len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", > > > > len ? ", " : "", "pin_file"); > > > > len += scnprintf(buf + len, PAGE_SIZE - len, "\n"); > > > > > > This is a HUGE abuse of sysfs and should not be encouraged and added to. > > > > This feature entry was originally added in 2017. Let me try to clean this up > > after merging this. > > Thank you. > > > > Please make these "one value per file" and do not keep growing a single > > > file that has to be parsed otherwise you will break userspace tools. > > > > > > And I don't see a Documentation/ABI/ entry for this either :( > > > > There is in Documentation/ABI/testing/sysfs-fs-f2fs. > > So this new item was documented in the file before the kernel change was > made? Do we need to describe all the strings in this entry? 203 What: /sys/fs/f2fs//features 204 Date: July 2017 205 Contact: "Jaegeuk Kim" 206 Description: Shows all enabled features in current device. > > greg k-h 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 X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DEEC8C47096 for ; Thu, 3 Jun 2021 17:53:49 +0000 (UTC) Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9D0D5613E3 for ; Thu, 3 Jun 2021 17:53:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9D0D5613E3 Authentication-Results: mail.kernel.org; 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Thu, 03 Jun 2021 17:53:45 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2D15B61361; Thu, 3 Jun 2021 17:53:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622742808; bh=pDpZsiO18U3DpgGBUoBUjRv/wLt0NlND3MIarXRGoV8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Nwq9nSiBoW/Ze1Swd6Tze6bxP2LUM0bNiB/4j4SsGplCWyCz0W07OoZxwumPGWpmj a/5GEzYZlV1zEcE9SNyZM7R2phDc3sJr8ot1yiMrH5itbqzcCKMxO2nwxbvniRpd+a hPhTNUWTFCMx1j6PouGjKjegEdhy0FhFqXbLrDj4x5Btx/vc9Fa0VtcGIt1ab8E1wT 6yJPd6knHT/lU0r03vKdBq8MwU5neM1v9paHSM8Yw2A1kwNsHLajxDWIvOXiEh8deQ 7lPSbN5EVpr8S/jnQdyRhKF/+IRyXdDwba/EjroEcrfGU5+k7I8WewYIg3yfxacIWW 5g0qh3/z0pyMQ== Date: Thu, 3 Jun 2021 10:53:26 -0700 From: Jaegeuk Kim To: Greg KH Message-ID: References: <20210603095038.314949-1-drosen@google.com> <20210603095038.314949-3-drosen@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Headers-End: 1lorXF-0005Jl-44 Subject: Re: [f2fs-dev] [PATCH v2 2/2] f2fs: Advertise encrypted casefolding in sysfs X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Daniel Rosenberg , kernel-team@android.com, linux-kernel@vger.kernel.org, stable@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, Gabriel Krisman Bertazi Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net On 06/03, Greg KH wrote: > On Thu, Jun 03, 2021 at 08:40:24AM -0700, Jaegeuk Kim wrote: > > On 06/03, Greg KH wrote: > > > On Thu, Jun 03, 2021 at 09:50:38AM +0000, Daniel Rosenberg wrote: > > > > Older kernels don't support encryption with casefolding. This adds > > > > the sysfs entry encrypted_casefold to show support for those combined > > > > features. Support for this feature was originally added by > > > > commit 7ad08a58bf67 ("f2fs: Handle casefolding with Encryption") > > > > > > > > Fixes: 7ad08a58bf67 ("f2fs: Handle casefolding with Encryption") > > > > Cc: stable@vger.kernel.org # v5.11+ > > > > Signed-off-by: Daniel Rosenberg > > > > --- > > > > fs/f2fs/sysfs.c | 15 +++++++++++++-- > > > > 1 file changed, 13 insertions(+), 2 deletions(-) > > > > > > > > diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c > > > > index 09e3f258eb52..6604291a3cdf 100644 > > > > --- a/fs/f2fs/sysfs.c > > > > +++ b/fs/f2fs/sysfs.c > > > > @@ -161,6 +161,9 @@ static ssize_t features_show(struct f2fs_attr *a, > > > > if (f2fs_sb_has_compression(sbi)) > > > > len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", > > > > len ? ", " : "", "compression"); > > > > + if (f2fs_sb_has_casefold(sbi) && f2fs_sb_has_encrypt(sbi)) > > > > + len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", > > > > + len ? ", " : "", "encrypted_casefold"); > > > > len += scnprintf(buf + len, PAGE_SIZE - len, "%s%s", > > > > len ? ", " : "", "pin_file"); > > > > len += scnprintf(buf + len, PAGE_SIZE - len, "\n"); > > > > > > This is a HUGE abuse of sysfs and should not be encouraged and added to. > > > > This feature entry was originally added in 2017. Let me try to clean this up > > after merging this. > > Thank you. > > > > Please make these "one value per file" and do not keep growing a single > > > file that has to be parsed otherwise you will break userspace tools. > > > > > > And I don't see a Documentation/ABI/ entry for this either :( > > > > There is in Documentation/ABI/testing/sysfs-fs-f2fs. > > So this new item was documented in the file before the kernel change was > made? Do we need to describe all the strings in this entry? 203 What: /sys/fs/f2fs//features 204 Date: July 2017 205 Contact: "Jaegeuk Kim" 206 Description: Shows all enabled features in current device. > > greg k-h _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel