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Tue, 13 Jan 2026 13:58:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9631AC116C6; Tue, 13 Jan 2026 13:58:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768312734; bh=Mdtt2cEJZpAolbsyohBBtRFFKdaOQF7vilJVbgvlUGo=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=IHCBTIj9UNV7zFILfsvU9XgyRBUFUE6V1XXitdJsXV4An6QT0u9i2rDGeRj289vt4 WkiQzfDRs5U6wYFLdweectESwFc4BRcilU+itHS6DCLfB7DAhWRozee85uqhuEjqlF Prv9Hfrz6iNh61KNTwvjFiJs3keHSxpck+Gwzx2D8YrMgW+dctCS7kPQk2sR+wY3Ye LVdXdKWUHDiQx93VDVxTV8xlHdDI5QYAJcuuO/W8J/CHNXaaxZsTvPy16ArXawSW3w k9kverbXLU/aJEA2C9xjImlMARaL5kA/oeRmR1ID5IDE6jpqCg9Q35w4USUFRQJJvu tdxB439zhtF1w== Message-ID: <774aac29-837d-4692-b744-e168d969a221@kernel.org> Date: Tue, 13 Jan 2026 08:58:45 -0500 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Christian Brauner References: <20260112174629.3729358-1-cel@kernel.org> <20260113-vorort-pudding-ef90f426d5cf@brauner> Content-Language: en-US Organization: kernel.org In-Reply-To: <20260113-vorort-pudding-ef90f426d5cf@brauner> X-Headers-End: 1vfevJ-00059u-S6 Subject: Re: [f2fs-dev] [PATCH v3 00/16] Exposing case folding behavior 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: , From: Chuck Lever via Linux-f2fs-devel Reply-To: Chuck Lever Cc: Jan Kara , pc@manguebit.org, yuezhang.mo@sony.com, cem@kernel.org, almaz.alexandrovich@paragon-software.com, adilger.kernel@dilger.ca, linux-cifs@vger.kernel.org, sfrench@samba.org, slava@dubeyko.com, linux-ext4@vger.kernel.org, linkinjeon@kernel.org, sprasad@microsoft.com, frank.li@vivo.com, vira@so61, ronniesahlberg@gmail.com, glaubitz@physik.fu-berlin.de, jaegeuk@kernel.org, hirofumi@mail.parknet.co.jp, linux-nfs@vger.kernel.org, tytso@mit.edu, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, senozhatsky@chromium.org, Chuck Lever , hansg@kernel.org, anna@kernel.org, linux-fsdevel@vger.kernel.org, sj1557.seo@samsung.com, trondmy@kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net On 1/13/26 4:04 AM, Christian Brauner wrote: > On Mon, Jan 12, 2026 at 12:46:13PM -0500, Chuck Lever wrote: >> From: Chuck Lever >> >> Following on from >> >> https://lore.kernel.org/linux-nfs/20251021-zypressen-bazillus-545a44af57fd@brauner/T/#m0ba197d75b7921d994cf284f3cef3a62abb11aaa >> >> I'm attempting to implement enough support in the Linux VFS to >> enable file services like NFSD and ksmbd (and user space >> equivalents) to provide the actual status of case folding support >> in local file systems. The default behavior for local file systems >> not explicitly supported in this series is to reflect the usual >> POSIX behaviors: >> >> case-insensitive = false >> case-preserving = true >> >> The case-insensitivity and case-preserving booleans can be consumed >> immediately by NFSD. These two booleans have been part of the NFSv3 >> and NFSv4 protocols for decades, in order to support NFS clients on >> non-POSIX systems. >> >> Support for user space file servers is why this series exposes case >> folding information via a user-space API. I don't know of any other >> category of user-space application that requires access to case >> folding info. > > This all looks good to me. > Just one question: This reads like you are exposing the new file attr > bits via userspace but I can only see changes to the kernel internal > headers not the uapi headers. So are you intentionally not exposing this > as a new uapi extension to file attr or is this an accident? The intention is to expose the new bits to user space. IIRC those got removed from uapi headers when I converted from using statx. I can fix that up and post a v4. -- Chuck Lever _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel