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 0FD703F0765; Thu, 23 Apr 2026 13:12:56 +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=1776949977; cv=none; b=BewrqMdI1I7l61xInj1oxNO9CWmTImBCgDXg4HVrIqzpIcGHvVtE2A+iIZwIfEbj5LhVuyWGW3K3LJ3bvZYMS6kzaMP0qItOlX00hpSv5vhlTHxjEnEOEw/OsW9ffDNHd6sbYdizffxAOFQ0vseh4HxwPy8svHlWZ6+jGaAOZKc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776949977; c=relaxed/simple; bh=01dn7VPhZ7IaECyyXD1nCwqLHm0UbGEoyqWSLe5m9tM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=AO4ATylozwoQiWcHcvegWeZTtUy3UEaDC5yXKA4ylKUV+TImU2MmpodHfLS2SY47JQfy4CfheNPogMS1LlIUtZLLt6iusZSn7aaO2F8SV9LgzCxTdv9VV6D/d6oM9IZ/99ZN3GC08/7tJJ1x8qlzDEmJe/eOBl3tDLv+FCHAxxk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=b16TdICr; 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="b16TdICr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7D18DC2BCB3; Thu, 23 Apr 2026 13:12:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776949976; bh=01dn7VPhZ7IaECyyXD1nCwqLHm0UbGEoyqWSLe5m9tM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=b16TdICr9mZe60kFhLdeV6cmaDGNpfEikcnOLDeDMJQaI50PMYJ71SyZVynZC8kiL AV1QLGVMlgt6HwMfbeFabkL6Y+SN+LBBGg6qX/tlVtV+u05nW5VAC8ZOQESOXIyszj 84pqe2SvG62KTSfPha1KhHSE6T9VQCz+MvgcXa0VMB1b+W0dY0KzW+a/4mi35X3SGw Q7D7BnK3q0aX9whLuq+knJl0jPHkYwvluDxHMYnS2X0FsMxf0Ndl5upRjY+tH4qADo 70V+o6eBQ2/Pff74JQ6znYpd23LcrqWPJXaS6s/glYbhQeGb6ETkDiG538HQ/hNS5E 7okz82vlQMJtg== From: Chuck Lever Date: Thu, 23 Apr 2026 09:12:17 -0400 Subject: [PATCH v10 14/17] isofs: Implement fileattr_get for case sensitivity Precedence: bulk X-Mailing-List: linux-xfs@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: <20260423-case-sensitivity-v10-14-c385d674a6cf@oracle.com> References: <20260423-case-sensitivity-v10-0-c385d674a6cf@oracle.com> In-Reply-To: <20260423-case-sensitivity-v10-0-c385d674a6cf@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=2116; i=chuck.lever@oracle.com; h=from:subject:message-id; bh=kh4Mo9qHXj56Vn2bJA48n97L5gwCBfFYkAAOr9+sl3U=; b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp6hq0A+HVhmB7vI2F2Wlqq9NFQfEtQyqUXWu+o +K1syaw55CJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaeoatAAKCRAzarMzb2Z/ l3wCD/0Q0GwJCTMg1VCavAps86ODA+BZ5Sf+KZI3WsJhfi2Q6VEwF2nE3f68CAKD2qEFpQNJTjZ p8CXuvaXF50nUleUavJovdk1Ml64Z285yMMMC/BddkYYlI8svFlX5otSLfer7YdS43KsqZ9LmFx rslu71Ht6Ih/pLG1yF+C7nVVfSAwRZOfe/1dWWkzUEkbb0Kl8OppNiil5kKyC8SpQ1JnwDlH3k8 x21yKTb1OQJ0juDNBSnGi8exnrtW41fFwc6BGFmn4aJ623MUFrdpZvcM5rz3ZoLdLDItLGbkXOq /Ik6XeetDOYWsniur/T72bGu1Zl+L5LmSjlXRL2yTQnM0W3pEwYchxCq6rCbccvVfLNht0TASAc Rq0Z1/fSFvEJ7gbsEM5Kod3pxFtb1hF3rjOYD4hrZTZf9mPcWMVpNIwbnBci4x0tqJ0m/QuoJlm lebV5vx9y1Gv/2Ofz0kuJzn4bC3DFfAVqnLH7+CmYDgeJhFWvBnPjwbALsQl/nbvexmc8zEKoU6 9+xr5X3TUoXH2P/OiH2Un3rJPPA0r/dUU07y5Xxv20Z3Kq124f+KfCxhF75Mkp0O9q1J1DqRsnd X42RnlWOnseNgKD/pWK+0g0gnw1eU02tEGLhyyMVtCqTWaEcAwPIFaJItnNz0Ufem7750QiY3kU xKhp7ACxhq+whDg== X-Developer-Key: i=chuck.lever@oracle.com; a=openpgp; fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97 From: Chuck Lever Upper layers such as NFSD need a way to query whether a filesystem handles filenames in a case-sensitive manner so they can provide correct semantics to remote clients. Without this information, NFS exports of ISO 9660 filesystems cannot advertise their filename case behavior. Implement isofs_fileattr_get() to report ISO 9660 case handling behavior via the FS_XFLAG_CASEFOLD flag. The 'check=r' (relaxed) mount option enables case-insensitive lookups, and this setting determines the value reported. By default, Joliet extensions operate in relaxed mode while plain ISO 9660 uses strict (case-sensitive) mode. All ISO 9660 variants are case-preserving, meaning filenames are stored exactly as they appear on the disc. The callback is registered only on isofs_dir_inode_operations because isofs has no custom inode_operations for regular files, and symlinks use the generic page_symlink_inode_operations. Reviewed-by: Jan Kara Signed-off-by: Chuck Lever --- fs/isofs/dir.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/fs/isofs/dir.c b/fs/isofs/dir.c index 2fd9948d606e..bca3de5a235d 100644 --- a/fs/isofs/dir.c +++ b/fs/isofs/dir.c @@ -14,6 +14,7 @@ #include #include #include "isofs.h" +#include int isofs_name_translate(struct iso_directory_record *de, char *new, struct inode *inode) { @@ -267,6 +268,15 @@ static int isofs_readdir(struct file *file, struct dir_context *ctx) return result; } +static int isofs_fileattr_get(struct dentry *dentry, struct file_kattr *fa) +{ + struct isofs_sb_info *sbi = ISOFS_SB(dentry->d_sb); + + if (sbi->s_check == 'r') + fa->fsx_xflags |= FS_XFLAG_CASEFOLD; + return 0; +} + const struct file_operations isofs_dir_operations = { .llseek = generic_file_llseek, @@ -281,6 +291,7 @@ const struct file_operations isofs_dir_operations = const struct inode_operations isofs_dir_inode_operations = { .lookup = isofs_lookup, + .fileattr_get = isofs_fileattr_get, }; -- 2.53.0