{"id":2226986,"url":"http://patchwork.ozlabs.org/api/patches/2226986/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260422-case-sensitivity-v9-17-be023cc070e2@oracle.com/","project":{"id":12,"url":"http://patchwork.ozlabs.org/api/projects/12/?format=json","name":"Linux CIFS Client","link_name":"linux-cifs-client","list_id":"linux-cifs.vger.kernel.org","list_email":"linux-cifs@vger.kernel.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260422-case-sensitivity-v9-17-be023cc070e2@oracle.com>","list_archive_url":null,"date":"2026-04-22T23:30:11","name":"[v9,17/17] ksmbd: Report filesystem case sensitivity via FS_ATTRIBUTE_INFORMATION","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"ff5422725078a0b7e8881cebe6debd2ad04cedc8","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-cifs-client/patch/20260422-case-sensitivity-v9-17-be023cc070e2@oracle.com/mbox/","series":[{"id":501130,"url":"http://patchwork.ozlabs.org/api/series/501130/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=501130","date":"2026-04-22T23:29:54","name":"Exposing case folding behavior","version":9,"mbox":"http://patchwork.ozlabs.org/series/501130/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2226986/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2226986/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-cifs@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.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=WEOVPlYi;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.105.105.114; helo=tor.lore.kernel.org;\n envelope-from=linux-cifs+bounces-11030-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=\"WEOVPlYi\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=10.30.226.201"],"Received":["from tor.lore.kernel.org (tor.lore.kernel.org [172.105.105.114])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g1Fr65BN9z1yD5\n\tfor ; Thu, 23 Apr 2026 09:32:22 +1000 (AEST)","from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby tor.lore.kernel.org (Postfix) with ESMTP id 6667330C21FD\n\tfor ; Wed, 22 Apr 2026 23:31:11 +0000 (UTC)","from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 14CE23A5447;\n\tWed, 22 Apr 2026 23:30:58 +0000 (UTC)","from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org\n [10.30.226.201])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id E16A83A4511;\n\tWed, 22 Apr 2026 23:30:57 +0000 (UTC)","by smtp.kernel.org (Postfix) with ESMTPSA id A46D4C19425;\n\tWed, 22 Apr 2026 23:30:55 +0000 (UTC)"],"ARC-Seal":"i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1776900658; cv=none;\n b=peeNzJciFakk3YzTfj0mPv53H6n5fnkyyxoyIg5ojFTDRl8+lch297zB+cCCUpp2kYkwaH1HZ9XXZAfgZR4ul0YK79v4MJeXWX4ounLDfBqAnveCbycvey+tvGGNgxsXEC0uPWFiNjaV4ne9UkIZv1AZ9YPxIQvIFHbJkn25dmM=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1776900658; c=relaxed/simple;\n\tbh=yGB+SiukKqXG153GFiqJqhuat+PctFhKpyG9E7K2Nwk=;\n\th=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References:\n\t In-Reply-To:To:Cc;\n b=JNGEVG+OSWIZW1pBWIP73guNmMeD288YzITp0OQWg2Z9BAaPVyLSifWDjRHoCVrMGnoQTenPk0b2ITAK/9r4Ad6xYbi9YYq4B75jTlcFHdHsYoqci9S61MxQq6da1MGTNT6EtMVGFwN7ff9xbc9gGrdV4Cra4Y9LHihDoGILPwg=","ARC-Authentication-Results":"i=1; smtp.subspace.kernel.org;\n dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=WEOVPlYi; 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=1776900657;\n\tbh=yGB+SiukKqXG153GFiqJqhuat+PctFhKpyG9E7K2Nwk=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=WEOVPlYiy41FokHzJ/G3c6LQEKjEa140BOLBum2ty56e48W5ncchnQm34HxR1orSK\n\t 2j3/TOEzx3WBAwpBlet9UiukU9BnswuxpxPCaAv9NnjM0S8HpZU7YQbpOla3YL4f2Q\n\t 9Hr4PqJx1YDEFGUhFrjOLoy8EOGinKE9n1UYd5AZC3Zs0QpmP2HXLGnoaP2cJt3VNw\n\t iCzI43DWk8neu38UTOipBATiQgLD2nM3EFEwiaOiibCD/06RwM/whf2hhZe5KAUguJ\n\t JEa54CvrQdbBVNX+tki2kUGuYTCFFXeamDcxo+8BvTPdlhZkLwNXADC3biNTMLmU+p\n\t ROjyOUWLFL8wQ==","From":"Chuck Lever ","Date":"Wed, 22 Apr 2026 19:30:11 -0400","Subject":"[PATCH v9 17/17] ksmbd: Report filesystem case sensitivity via\n FS_ATTRIBUTE_INFORMATION","Precedence":"bulk","X-Mailing-List":"linux-cifs@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-v9-17-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=2564;\n i=chuck.lever@oracle.com; h=from:subject:message-id;\n bh=2nS1LtlO/vmrzHVVaUmzB5jhcNO5BsoFT5yc1yYmaA0=;\n b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp6VoGIYmy6NHTYqRGKLzunLRkH1VFkkmk3nfRE\n QrXoqRc1COJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaelaBgAKCRAzarMzb2Z/\n l9JtD/4lsYqo5MVTwAVbK3MDQFPfipoXxMx5tsyzwfZh40XeahxwjqXXRMFQSRuwY2jQOg3BV0E\n 4lEofWunivHzQWh1Cgt3noIh70i3Luw+mbNRpnphdJjx0qQTqmk4CG26zOMfw8y131burjTqlgB\n Xtbsi9CV2FsqzJKt3W9KvuWnHvO9044tzCl6Pv2cJVReaHFTSTGAVuoX/7eC1yeNaV0joaNCdHQ\n VkH7niDabdUGlxJ09K/Zu5Nml+Jl/VrPiiU5NWzpVRJ8S7b4nK6TNTSBGHVBme52ClcHBNXbHEF\n YBgUu2JZJxOpDk78wzMaTPjmhoSBgKHx0poogwNRXVZS2FwcmVFmOPitYhsO/mTB8FVc53Y292J\n rLeBq1vL0NSVWqpSd9bZ1hZXroaukxXGY190syIzT26bZ3IdG0WQJX2eNXyEe3/gQPYOmvIBm9b\n 1j0M+glgCryYZ7AqyQBnNUfYrxcOxdQu0Evs8DprN6ptEi9Cm6xpliHtzJqK974zY6J6udmG89f\n wTzKocypE6W2wNP2MzL7BJwUcYq9CQ7CFjqHN4IRCg08iKjjtI72VQq/wPOnZs2PHjCq+DJtDlR\n GlWEXv230nLY/lXAYUa+0ijVG6ZfkjDXPSui+aKmqM6UhKWIbnSID54OjV9Voi4iTsGAZwA6A1r\n ufg5mxTsl+M9YvA==","X-Developer-Key":"i=chuck.lever@oracle.com; a=openpgp;\n fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97"},"content":"From: Chuck Lever \n\nFS_ATTRIBUTE_INFORMATION responses have always reported\nFILE_CASE_SENSITIVE_SEARCH and FILE_CASE_PRESERVED_NAMES\nunconditionally. Case-insensitive filesystems like exFAT, and\ncasefolded directories on ext4 or f2fs, have no way to signal\ntheir actual semantics to SMB clients.\n\nNow that filesystems expose case behavior through ->fileattr_get,\nquery it via vfs_fileattr_get() and translate the FS_XFLAG_CASEFOLD\nand FS_XFLAG_CASENONPRESERVING flags into the corresponding SMB\nattributes. Filesystems without ->fileattr_get continue reporting\ndefault POSIX behavior (case-sensitive, case-preserving).\n\nSMB's FS_ATTRIBUTE_INFORMATION reports per-share attributes from\nthe share root, not per-file. Shares mixing casefold and\nnon-casefold directories report the root directory's behavior.\n\nAcked-by: Namjae Jeon \nSigned-off-by: Chuck Lever \n---\n fs/smb/server/smb2pdu.c | 25 +++++++++++++++++++------\n 1 file changed, 19 insertions(+), 6 deletions(-)","diff":"diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c\nindex ee32e61b6d3c..7e91b578ca28 100644\n--- a/fs/smb/server/smb2pdu.c\n+++ b/fs/smb/server/smb2pdu.c\n@@ -14,6 +14,7 @@\n #include \n #include \n #include \n+#include \n \n #include \"glob.h\"\n #include \"smbfsctl.h\"\n@@ -5541,16 +5542,28 @@ static int smb2_get_info_filesystem(struct ksmbd_work *work,\n \tcase FS_ATTRIBUTE_INFORMATION:\n \t{\n \t\tFILE_SYSTEM_ATTRIBUTE_INFO *info;\n+\t\tstruct file_kattr fa = {};\n \t\tsize_t sz;\n+\t\tu32 attrs;\n+\t\tint err;\n \n \t\tinfo = (FILE_SYSTEM_ATTRIBUTE_INFO *)rsp->Buffer;\n-\t\tinfo->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |\n-\t\t\t\t\t FILE_PERSISTENT_ACLS |\n-\t\t\t\t\t FILE_UNICODE_ON_DISK |\n-\t\t\t\t\t FILE_CASE_PRESERVED_NAMES |\n-\t\t\t\t\t FILE_CASE_SENSITIVE_SEARCH |\n-\t\t\t\t\t FILE_SUPPORTS_BLOCK_REFCOUNTING);\n+\t\tattrs = FILE_SUPPORTS_OBJECT_IDS |\n+\t\t\tFILE_PERSISTENT_ACLS |\n+\t\t\tFILE_UNICODE_ON_DISK |\n+\t\t\tFILE_SUPPORTS_BLOCK_REFCOUNTING;\n \n+\t\terr = vfs_fileattr_get(path.dentry, &fa);\n+\t\tif (err && err != -ENOIOCTLCMD) {\n+\t\t\tpath_put(&path);\n+\t\t\treturn err;\n+\t\t}\n+\t\tif (!(fa.fsx_xflags & FS_XFLAG_CASEFOLD))\n+\t\t\tattrs |= FILE_CASE_SENSITIVE_SEARCH;\n+\t\tif (!(fa.fsx_xflags & FS_XFLAG_CASENONPRESERVING))\n+\t\t\tattrs |= FILE_CASE_PRESERVED_NAMES;\n+\n+\t\tinfo->Attributes = cpu_to_le32(attrs);\n \t\tinfo->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);\n \n \t\tif (test_share_config_flag(work->tcon->share_conf,\n","prefixes":["v9","17/17"]}