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=-16.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, 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 2B48BC47098 for ; Thu, 3 Jun 2021 10:05:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1230061182 for ; Thu, 3 Jun 2021 10:05:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229799AbhFCKHD (ORCPT ); Thu, 3 Jun 2021 06:07:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:47368 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229620AbhFCKHB (ORCPT ); Thu, 3 Jun 2021 06:07:01 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5CBA2611CA; Thu, 3 Jun 2021 10:04:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1622714699; bh=ruv4xX6Eg/YETRybxUhFp8CkZkACBGmGpdG3fCfTNYU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=G45+ZBzfThzxAH4ZUIGo4rpnqPa6od3F0KNjIxTAh/TfAMROu2xvHCoQTFNLRtRb7 BVcbWAi/urwY1OQkhDRsSjlzoctHOVjWIvz/j86jj2PtZ3fpaiABbrWwE8vyQqkfIB KiKruC8CbO0DqbV4tOWh2O0khvtt4TUDlSTFEYV8= Date: Thu, 3 Jun 2021 12:04:57 +0200 From: Greg KH To: Daniel Rosenberg Cc: Jaegeuk Kim , 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: <20210603095038.314949-3-drosen@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. 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 :( not good... 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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,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 DFDA7C47082 for ; Thu, 3 Jun 2021 10:05:15 +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 9FA3461057 for ; Thu, 3 Jun 2021 10:05:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9FA3461057 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linux-f2fs-devel-bounces@lists.sourceforge.net Received: from [127.0.0.1] (helo=sfs-ml-4.v29.lw.sourceforge.com) by sfs-ml-4.v29.lw.sourceforge.com with esmtp (Exim 4.90_1) (envelope-from ) id 1lokDv-0005x1-O3; Thu, 03 Jun 2021 10:05:11 +0000 Received: from [172.30.20.202] (helo=mx.sourceforge.net) by sfs-ml-4.v29.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lokDu-0005wp-HH for linux-f2fs-devel@lists.sourceforge.net; Thu, 03 Jun 2021 10:05:10 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=In-Reply-To:Content-Type:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=4cb8pQMot6EQOASetu5YdtbzUmRKeJfyXrcqNQL+/RE=; b=kXrOSYfFY17zMUZSzR+BBfOAB/ ICFHXYFXaFYH4aIYY7Fv+1C9vE7a3Sxf2RAwGWEp53dVlyVlm73CVcdrxR3aOdzM1GNGNJoqgYYw5 04vxNtAoZHv31vUgQyDaLEvbEMDbf2cVRELJrNPGTTEDzuno8/tBHwqbeFc78TTFwYK4=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=In-Reply-To:Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To :From:Date:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=4cb8pQMot6EQOASetu5YdtbzUmRKeJfyXrcqNQL+/RE=; b=Oysirw+fCydd3mU3ywYv7t4mzu eMS/0s1Cs+YcVPno30WnRYsHI8hSCGBY1e3o/Q3gq45eGcYFtbbf8kn4Rof+yaD6RHvTpUnEK1zHs VZrR0IGRRQujyuW+BnqMwGQaTSGMdjWt9dCLdp1Yd6lwuYKCnWd4jTx+og8mlWpyIh6A=; Received: from mail.kernel.org ([198.145.29.99]) by sfi-mx-1.v28.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92.3) id 1lokDu-008jJJ-3s for linux-f2fs-devel@lists.sourceforge.net; Thu, 03 Jun 2021 10:05:13 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5CBA2611CA; Thu, 3 Jun 2021 10:04:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1622714699; bh=ruv4xX6Eg/YETRybxUhFp8CkZkACBGmGpdG3fCfTNYU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=G45+ZBzfThzxAH4ZUIGo4rpnqPa6od3F0KNjIxTAh/TfAMROu2xvHCoQTFNLRtRb7 BVcbWAi/urwY1OQkhDRsSjlzoctHOVjWIvz/j86jj2PtZ3fpaiABbrWwE8vyQqkfIB KiKruC8CbO0DqbV4tOWh2O0khvtt4TUDlSTFEYV8= Date: Thu, 3 Jun 2021 12:04:57 +0200 From: Greg KH To: Daniel Rosenberg 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: <20210603095038.314949-3-drosen@google.com> X-Headers-End: 1lokDu-008jJJ-3s 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: kernel-team@android.com, linux-kernel@vger.kernel.org, stable@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, Jaegeuk Kim , Gabriel Krisman Bertazi Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net 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. 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 :( not good... greg k-h _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel