{"id":2227004,"url":"http://patchwork.ozlabs.org/api/patches/2227004/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260422-case-sensitivity-v9-12-be023cc070e2@oracle.com/","project":{"id":8,"url":"http://patchwork.ozlabs.org/api/projects/8/?format=json","name":"Linux ext4 filesystem development","link_name":"linux-ext4","list_id":"linux-ext4.vger.kernel.org","list_email":"linux-ext4@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260422-case-sensitivity-v9-12-be023cc070e2@oracle.com>","list_archive_url":null,"date":"2026-04-22T23:30:06","name":"[v9,12/17] f2fs: Add case sensitivity reporting to fileattr_get","commit_ref":null,"pull_url":null,"state":"not-applicable","archived":false,"hash":"326bd754da024b10e84cb5a167ddaef4ba9b1698","submitter":{"id":86689,"url":"http://patchwork.ozlabs.org/api/people/86689/?format=json","name":"Chuck Lever","email":"cel@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260422-case-sensitivity-v9-12-be023cc070e2@oracle.com/mbox/","series":[{"id":501129,"url":"http://patchwork.ozlabs.org/api/series/501129/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/list/?series=501129","date":"2026-04-22T23:29:54","name":"Exposing case folding behavior","version":9,"mbox":"http://patchwork.ozlabs.org/series/501129/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2227004/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2227004/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-ext4@vger.kernel.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","patchwork-incoming@ozlabs.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=il7N3dGq;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=2404:9400:2221:ea00::3; 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arc=none smtp.client-ip=10.30.226.201"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1776900645;\n\tbh=PjsU9Svmz06mzp6rEncT9E/c+j3QoZVc1ar43kaCids=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=il7N3dGqj0CggeHfeUKm2GgxwU7TmpzqTirAkrMvLZV84Z5Ys3t0NO5UfPyqwBQ4w\n\t KfkNQkGt6XesfFbIpALB85c/t+u6iWyj0pGW1K1ZQI2ph8ZTRxmpYVsKivD1RIngU2\n\t GmBgccGOgHGI7UcfNkpTNp/rqhSuReDPRkivzSk75Ww+ni9fHUfSwoJJY+HUEkvzkB\n\t JOPwCPnWyyDvZ/htWc3L/42TCeWrFSmjWrSf1iTeGjYapMRIOdesYftUN0xl76qiXv\n\t 2l+GQXZx7hZghbxGgEtjG31ruvSBlp0yE2vPdkbxo/3seAX/x9/WgAZOCgCWUDBj0Q\n\t //meVAlWqzAmA==","From":"Chuck Lever ","Date":"Wed, 22 Apr 2026 19:30:06 -0400","Subject":"[PATCH v9 12/17] f2fs: Add case sensitivity reporting to\n fileattr_get","Precedence":"bulk","X-Mailing-List":"linux-ext4@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 ,\n Christian Brauner , Jan Kara ","Cc":"linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,\n linux-xfs@vger.kernel.org, linux-cifs@vger.kernel.org,\n linux-nfs@vger.kernel.org, linux-api@vger.kernel.org,\n linux-f2fs-devel@lists.sourceforge.net, hirofumi@mail.parknet.co.jp,\n linkinjeon@kernel.org, sj1557.seo@samsung.com, yuezhang.mo@sony.com,\n almaz.alexandrovich@paragon-software.com, slava@dubeyko.com,\n glaubitz@physik.fu-berlin.de, frank.li@vivo.com, tytso@mit.edu,\n adilger.kernel@dilger.ca, cem@kernel.org, sfrench@samba.org,\n pc@manguebit.org, ronniesahlberg@gmail.com, sprasad@microsoft.com,\n trondmy@kernel.org, anna@kernel.org, jaegeuk@kernel.org, chao@kernel.org,\n hansg@kernel.org, senozhatsky@chromium.org,\n Chuck Lever ","X-Mailer":"b4 0.16-dev","X-Developer-Signature":"v=1; a=openpgp-sha256; l=1357;\n i=chuck.lever@oracle.com; h=from:subject:message-id;\n bh=VPjzbnXW1pubGqzv+x/v8JVwQ1rV4VASVn6uK7QQPMw=;\n b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp6VoGUJjs9CvzEarp5VOjWZnmXKebFLgGJvGS4\n HWl/+7McbaJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaelaBgAKCRAzarMzb2Z/\n l5VJEACcD/MoAmNmtfPCbhXwyXSyo/LDgCQ9S7FiAtuTBH1mbE3CWSXtfrmueyUzcuGWbvTWuLd\n 6VRIdx2ood3dd0HWhRVh85EAnKNK4OLI4Q2BRlzhWtD1TaLnq1LKeiCU31d8QgNhrnk9Z8b6AaA\n ABJxaW/nMl1g7foin4qMFu7IueKML9wyKSI4NvfqNzvuJ45I2LW+E0jcR++1lrBFO+lF+YXgaE7\n 88eABqKP00oJNVNgGbMF9pY8b//R3V6u/nZrV/CgADJMSC5g8OaR6nEI9iOtsU81XjAk1CzgY6V\n LbjL9BwK6mZuj7vZAcep4x/g3qNL3tk8JNRRXHIW4A4nAutITm8WSk3d7zYvn1V0CLvpYWl6XVj\n 5Au3BWnDEwD8TNv5e2cVTgSrL2SEuB5nTxZgWMob1QY/DNhCOOc9dBI62V1tp/Y2J6dx8AzMJkP\n MNzH+uIdoxpRGAo3u21a5A58cX9IPQGIhygMpa0+VczI0+exxGrP+Nb2kYLmwErkiIQX/wnus4m\n /HFCC5xmpAEDMzANfBaifXgPSR7V/oCkxFAtCf4h/r/PHG8jRTcF9jwJtrtyEEiBypUk8f5y0nM\n l79H+tg7pEauZNiiAFtt83HEiGxmHrYK8ITV0Gu1ruMxFPyMuj5quEpf/6WfLePQfc3KEtbmOde\n mgcBPtMCLfcCYhg==","X-Developer-Key":"i=chuck.lever@oracle.com; a=openpgp;\n fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97","X-Spam-Status":"No, score=-1.2 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DMARC_PASS,\n\tMAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org"},"content":"From: Chuck Lever \n\nNFS and other remote filesystem protocols need to determine\nwhether a local filesystem performs case-insensitive lookups\nso they can provide correct semantics to clients. Without\nthis information, f2fs exports cannot properly advertise\ntheir filename case behavior.\n\nReport f2fs case sensitivity behavior via the FS_XFLAG_CASEFOLD\nflag. Like ext4, f2fs supports per-directory case folding via\nthe casefold flag (IS_CASEFOLDED). f2fs always preserves case\nat rest.\n\nReviewed-by: Chao Yu \nSigned-off-by: Chuck Lever \n---\n fs/f2fs/file.c | 8 ++++++++\n 1 file changed, 8 insertions(+)","diff":"diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c\nindex fb12c5c9affd..347568ff0d58 100644\n--- a/fs/f2fs/file.c\n+++ b/fs/f2fs/file.c\n@@ -3463,6 +3463,14 @@ int f2fs_fileattr_get(struct dentry *dentry, struct file_kattr *fa)\n \tif (f2fs_sb_has_project_quota(F2FS_I_SB(inode)))\n \t\tfa->fsx_projid = from_kprojid(&init_user_ns, fi->i_projid);\n \n+\t/*\n+\t * Casefold is a per-directory attribute in f2fs; the on-disk\n+\t * name is preserved regardless. Report FS_XFLAG_CASEFOLD for\n+\t * casefolded directories so callers (e.g. NFS export) can\n+\t * advertise case-insensitive lookup semantics for that tree.\n+\t */\n+\tif (IS_CASEFOLDED(inode))\n+\t\tfa->fsx_xflags |= FS_XFLAG_CASEFOLD;\n \treturn 0;\n }\n \n","prefixes":["v9","12/17"]}