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=-17.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 48195C433E4 for ; Tue, 23 Mar 2021 21:59:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A92D619E6 for ; Tue, 23 Mar 2021 21:59:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233805AbhCWV7C (ORCPT ); Tue, 23 Mar 2021 17:59:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33694 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233630AbhCWV6a (ORCPT ); Tue, 23 Mar 2021 17:58:30 -0400 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D1CAFC061574; Tue, 23 Mar 2021 14:58:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:Content-Type :In-Reply-To:MIME-Version:Date:Message-ID:From:References:Cc:To:Subject: Sender:Reply-To:Content-ID:Content-Description; bh=tguUq1/+1debzLV6j9Qgw6nQZpGX4uuwNKugLMThEpg=; b=poBC+bwUGkwikBCg8Z6eMjckck YZtFGWnQEaSmbAOu8SkRB3iA9t0z3qw4zmTSUNa2oC/FWKKEVKQudBTRkN1vVYoKhCZAc4aQVZeKh FDRUQApRRoesq5atcre1b9j0GXWCNUriurqVYCFpcajVZuB46he57P7hRzNU7NyJIZZZk8F3c+ZKF aJsev2bZoUFH++pmRGCN67Yh4Wc46Y99XYJCEKipntI6XXy7gIu2DfLXk7LVkV084g8jEyDprRExs +8pRy993sSAh04TGM9Yiw7xBD67LtkN/F1aHWbf/IC+MZSWzGYPt5VieAnQ9msV9K3eNcqMYfXQzs eJ08bHsQ==; Received: from [2601:1c0:6280:3f0::3ba4] by desiato.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1lOp2e-00FoaL-8Q; Tue, 23 Mar 2021 21:58:24 +0000 Subject: Re: [RFC PATCH 4/4] docs: tmpfs: Add casefold options To: =?UTF-8?Q?Andr=c3=a9_Almeida?= , Hugh Dickins , Andrew Morton , Alexander Viro Cc: krisman@collabora.com, smcv@collabora.com, kernel@collabora.com, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Daniel Rosenberg References: <20210323195941.69720-1-andrealmeid@collabora.com> <20210323195941.69720-5-andrealmeid@collabora.com> From: Randy Dunlap Message-ID: Date: Tue, 23 Mar 2021 14:58:20 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 MIME-Version: 1.0 In-Reply-To: <20210323195941.69720-5-andrealmeid@collabora.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi-- On 3/23/21 12:59 PM, André Almeida wrote: > Document mounting options to enable casefold support in tmpfs. > > Signed-off-by: André Almeida > --- > Documentation/filesystems/tmpfs.rst | 26 ++++++++++++++++++++++++++ > 1 file changed, 26 insertions(+) > > diff --git a/Documentation/filesystems/tmpfs.rst b/Documentation/filesystems/tmpfs.rst > index 0408c245785e..84c87c309bd7 100644 > --- a/Documentation/filesystems/tmpfs.rst > +++ b/Documentation/filesystems/tmpfs.rst > @@ -170,6 +170,32 @@ So 'mount -t tmpfs -o size=10G,nr_inodes=10k,mode=700 tmpfs /mytmpfs' > will give you tmpfs instance on /mytmpfs which can allocate 10GB > RAM/SWAP in 10240 inodes and it is only accessible by root. > > +tmpfs has the following mounting options for case-insesitive lookups support: > + > +========= ============================================================== > +casefold Enable casefold support at this mount point using the given > + argument as enconding. Currently only utf8 encondings are supported. encoding. encodings > +cf_strict Enable strict casefolding at this mouting point (disabled by mount > + default). This means that invalid strings should be reject by the rejected > + file system. > +========= ============================================================== > + > +Note that this option doesn't enable casefold by default, one needs to set default; one needs to set the > +casefold flag per directory, setting the +F attribute in an empty directory. New > +directories within a casefolded one will inherit the flag. -- ~Randy