From mboxrd@z Thu Jan 1 00:00:00 1970 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 3252A33B6E3; Wed, 22 Apr 2026 23:30:46 +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=1776900646; cv=none; b=DgabAxbhUiZnEfEcbqM87e0XIAO3qzLo0k31t5oiTnesX78bkMaS4v1FLW8sAz+dmyfRhGAzF8MNZG+XwrTOKXk6Bcp3pcLs87RorvNyoGwNPmxrA9NDiidufPbLgiW0bQodwQu3o5YdiVbwIX/RVPpNMGiVOFoDdVquAW9XJCU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776900646; c=relaxed/simple; bh=PjsU9Svmz06mzp6rEncT9E/c+j3QoZVc1ar43kaCids=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=sByMEm+VKsuhEWc5uzn+OwrDR6JVMseCgOQlRR8efJlNWjj9QZE5MbvAm3IwGzB9t9vQ5gRmDwHUsbi8LoXTGT1uBaIW6wt4HajMfC2IsNLdCcGX0W62J/99/eJVdkk47kYjHAiyl80wMmVnMvNY5TSEZdBFugc/up33LiWLAQ8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=il7N3dGq; 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="il7N3dGq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AFE58C2BCB4; Wed, 22 Apr 2026 23:30:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776900645; bh=PjsU9Svmz06mzp6rEncT9E/c+j3QoZVc1ar43kaCids=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=il7N3dGqj0CggeHfeUKm2GgxwU7TmpzqTirAkrMvLZV84Z5Ys3t0NO5UfPyqwBQ4w KfkNQkGt6XesfFbIpALB85c/t+u6iWyj0pGW1K1ZQI2ph8ZTRxmpYVsKivD1RIngU2 GmBgccGOgHGI7UcfNkpTNp/rqhSuReDPRkivzSk75Ww+ni9fHUfSwoJJY+HUEkvzkB JOPwCPnWyyDvZ/htWc3L/42TCeWrFSmjWrSf1iTeGjYapMRIOdesYftUN0xl76qiXv 2l+GQXZx7hZghbxGgEtjG31ruvSBlp0yE2vPdkbxo/3seAX/x9/WgAZOCgCWUDBj0Q //meVAlWqzAmA== From: Chuck Lever Date: Wed, 22 Apr 2026 19:30:06 -0400 Subject: [PATCH v9 12/17] f2fs: Add case sensitivity reporting to fileattr_get Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260422-case-sensitivity-v9-12-be023cc070e2@oracle.com> References: <20260422-case-sensitivity-v9-0-be023cc070e2@oracle.com> In-Reply-To: <20260422-case-sensitivity-v9-0-be023cc070e2@oracle.com> To: Al Viro , Christian Brauner , Jan Kara Cc: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-api@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, hirofumi@mail.parknet.co.jp, linkinjeon@kernel.org, sj1557.seo@samsung.com, yuezhang.mo@sony.com, almaz.alexandrovich@paragon-software.com, slava@dubeyko.com, glaubitz@physik.fu-berlin.de, frank.li@vivo.com, tytso@mit.edu, adilger.kernel@dilger.ca, cem@kernel.org, sfrench@samba.org, pc@manguebit.org, ronniesahlberg@gmail.com, sprasad@microsoft.com, trondmy@kernel.org, anna@kernel.org, jaegeuk@kernel.org, chao@kernel.org, hansg@kernel.org, senozhatsky@chromium.org, Chuck Lever X-Mailer: b4 0.16-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1357; i=chuck.lever@oracle.com; h=from:subject:message-id; bh=VPjzbnXW1pubGqzv+x/v8JVwQ1rV4VASVn6uK7QQPMw=; b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp6VoGUJjs9CvzEarp5VOjWZnmXKebFLgGJvGS4 HWl/+7McbaJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaelaBgAKCRAzarMzb2Z/ l5VJEACcD/MoAmNmtfPCbhXwyXSyo/LDgCQ9S7FiAtuTBH1mbE3CWSXtfrmueyUzcuGWbvTWuLd 6VRIdx2ood3dd0HWhRVh85EAnKNK4OLI4Q2BRlzhWtD1TaLnq1LKeiCU31d8QgNhrnk9Z8b6AaA ABJxaW/nMl1g7foin4qMFu7IueKML9wyKSI4NvfqNzvuJ45I2LW+E0jcR++1lrBFO+lF+YXgaE7 88eABqKP00oJNVNgGbMF9pY8b//R3V6u/nZrV/CgADJMSC5g8OaR6nEI9iOtsU81XjAk1CzgY6V LbjL9BwK6mZuj7vZAcep4x/g3qNL3tk8JNRRXHIW4A4nAutITm8WSk3d7zYvn1V0CLvpYWl6XVj 5Au3BWnDEwD8TNv5e2cVTgSrL2SEuB5nTxZgWMob1QY/DNhCOOc9dBI62V1tp/Y2J6dx8AzMJkP MNzH+uIdoxpRGAo3u21a5A58cX9IPQGIhygMpa0+VczI0+exxGrP+Nb2kYLmwErkiIQX/wnus4m /HFCC5xmpAEDMzANfBaifXgPSR7V/oCkxFAtCf4h/r/PHG8jRTcF9jwJtrtyEEiBypUk8f5y0nM l79H+tg7pEauZNiiAFtt83HEiGxmHrYK8ITV0Gu1ruMxFPyMuj5quEpf/6WfLePQfc3KEtbmOde mgcBPtMCLfcCYhg== X-Developer-Key: i=chuck.lever@oracle.com; a=openpgp; fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97 From: Chuck Lever NFS and other remote filesystem protocols need to determine whether a local filesystem performs case-insensitive lookups so they can provide correct semantics to clients. Without this information, f2fs exports cannot properly advertise their filename case behavior. Report f2fs case sensitivity behavior via the FS_XFLAG_CASEFOLD flag. Like ext4, f2fs supports per-directory case folding via the casefold flag (IS_CASEFOLDED). f2fs always preserves case at rest. Reviewed-by: Chao Yu Signed-off-by: Chuck Lever --- fs/f2fs/file.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index fb12c5c9affd..347568ff0d58 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -3463,6 +3463,14 @@ int f2fs_fileattr_get(struct dentry *dentry, struct file_kattr *fa) if (f2fs_sb_has_project_quota(F2FS_I_SB(inode))) fa->fsx_projid = from_kprojid(&init_user_ns, fi->i_projid); + /* + * Casefold is a per-directory attribute in f2fs; the on-disk + * name is preserved regardless. Report FS_XFLAG_CASEFOLD for + * casefolded directories so callers (e.g. NFS export) can + * advertise case-insensitive lookup semantics for that tree. + */ + if (IS_CASEFOLDED(inode)) + fa->fsx_xflags |= FS_XFLAG_CASEFOLD; return 0; } -- 2.53.0