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 3150C22E3E9; Sat, 2 May 2026 14:21:18 +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=1777731678; cv=none; b=L7xgg3qxX1cgwJ7xyPbHxrstRwi9qXJJPcJARoPShv/IOrXtsfg58/uIAwTdnWj3FaYp+36DB+g70RhFIj7ZMd6zGYKzpPAKzejl03AleIJQaYJNE+tKbZrF1ClUdhi1wlk/rF62qr/w34joZLatu+xXGCZ4NCPWbRePiUeOeKE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777731678; c=relaxed/simple; bh=93lkf1HBQv1pjT23tKqszLwADekuVqw95GHVpFk/qSc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Hc+0kEH02tN9X/q3nnqxZhuPMl4g0JyfH3n36pvCE2qf69fDjTCsbHp6+XvGhBtfI3/qiKNkGfYSjEkFUwH4iTqetNwXX3EiA3GTQ1mNf7Jia6eU09yEgHJJmOgsStoAuRhoCiyLBplyXL6QxT11z/FawnH55NK1ZtfhTxOP2ts= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=c9dqznjq; 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="c9dqznjq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4A6D2C2BCB3; Sat, 2 May 2026 14:21:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777731678; bh=93lkf1HBQv1pjT23tKqszLwADekuVqw95GHVpFk/qSc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=c9dqznjqT3nK0gCeQf+quqbALJ8ZkUx/FFV7TY+6LxJNYXOuPjd18CBcyRsW7f8Xo 6U0JvbsS17ncMuKHbtY6r0j1lVz72vfsVnNSyCb1BCp5hxNjNyq9+rJIkK4xWhox5X KLEoejPahTxkRDbaukchtykIpVIzsv2N87a7n+OPeo5GZPqOy72bPuTiwOOWfmvYIi qSrsD7ZJPp9sS649/dSuRGSMF0+o7yhh6/3p30Yi/6lWFkg3tA7ZRtCwsuJiq8zooe +i80WYpX1Ewa8uI54CY9/87F1WtD1c9n6rOFJgOEDK5QH+UdMJGtYjCnx/pNYz5Xad jDSjFr1aSQm9w== From: Chuck Lever Date: Sat, 02 May 2026 10:20:46 -0400 Subject: [PATCH v13 01/15] fs: Move file_kattr initialization to callers 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: <20260502-case-sensitivity-v13-1-aa853140311f@oracle.com> References: <20260502-case-sensitivity-v13-0-aa853140311f@oracle.com> In-Reply-To: <20260502-case-sensitivity-v13-0-aa853140311f@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 , "Darrick J. Wong" , Roland Mainz X-Mailer: b4 0.16-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=3605; i=chuck.lever@oracle.com; h=from:subject:message-id; bh=AWgZwG1E8rlvIL3m0PCLX9DfISmeBrTqPl/lfHkVgk0=; b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp9ghQxFmZlM8hYOkYPWqHSSZmcZJ8CLh1PP/PV +Mcq86IS9aJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCafYIUAAKCRAzarMzb2Z/ l6D0D/9nv8DJn/N4olT5nofAbnfCPhd3NiX0SPC6Gijz5K/lVi+fk2ZgRC0u9rHGkFoB2v8+IPA IE8J75WNmzrOhZbbkEeHle4EL/+O9LZFxmCLI3NscUDjscohPfIuRiDHSuCIDdTtUvaSFcteY6Q lSL2D7xPQPiUS2wmlT9UFZI19hIvSAIK7NZ1/MY5O4pqKYTQTp3a+R9h4n14GJdyxuQsPepP6PE BrHtJdqxb8OS32B9wi7zNgIi/OkyHUYob0OJXTMESPNcM5uokgn19Z3j+3d8f/IF101sARLiR4D nWn2wItMJv3zHiccy609tHPxcNZm5mQyHdrBJyVL1eAi8Z5yEDoNvVNF9oqx4LnqUB1JJdboWQT ondxrZ3iYYdeEZtlgJpB4vyLJ6S0YSJveawbMLUcrq/N8uZAjIL2YU9uxsZU4p0obzywlqqN1rq jZoBk9Hkuv9rEhLudlSHA/tEKURDapop2YKRLPRtljb6bpKDZr/gnLfYb3cZTDp5dnnfPkOb9lP a+2ffHzokxKLL0+Lb6MDogG9EK4bSjQELufwgdCIzfFT9NJ5Fv4mcxCfJmgggaaOrQIUhxKC6cr aPc/Wy0JR3yXVRtVPbkCn5hTBg9u2/daaw3lEGVVHE+FDG+aWEkZdkPr4aUBVNLYy0Mab6f+9ey WkQt0xrO3fuUkCA== X-Developer-Key: i=chuck.lever@oracle.com; a=openpgp; fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97 From: Chuck Lever fileattr_fill_xflags() and fileattr_fill_flags() memset the entire file_kattr struct before populating select fields, so callers cannot pre-set fields in fa->fsx_xflags without having their values clobbered. Darrick Wong noted that a function named "fill_xflags" touching more than xflags forces callers to know implementation details beyond its apparent scope. Drop the memset from both fill functions and initialize at the entry points instead: ioctl_setflags(), ioctl_fssetxattr(), the file_setattr() syscall, and xfs_ioc_fsgetxattra() now declare fa with an aggregate initializer. ioctl_getflags(), ioctl_fsgetxattr(), and the file_getattr() syscall already aggregate-initialize fa to pass flags_valid/fsx_valid hints into vfs_fileattr_get(). Subsequent patches rely on this so that ->fileattr_get() handlers can set case-sensitivity flags (FS_XFLAG_CASEFOLD, FS_XFLAG_CASENONPRESERVING) in fa->fsx_xflags before the fill functions run. Suggested-by: Darrick J. Wong Reviewed-by: Jan Kara Reviewed-by: Darrick J. Wong Reviewed-by: Roland Mainz Signed-off-by: Chuck Lever --- fs/file_attr.c | 12 ++++-------- fs/xfs/xfs_ioctl.c | 2 +- 2 files changed, 5 insertions(+), 9 deletions(-) diff --git a/fs/file_attr.c b/fs/file_attr.c index da983e105d70..f429da66a317 100644 --- a/fs/file_attr.c +++ b/fs/file_attr.c @@ -15,12 +15,10 @@ * @fa: fileattr pointer * @xflags: FS_XFLAG_* flags * - * Set ->fsx_xflags, ->fsx_valid and ->flags (translated xflags). All - * other fields are zeroed. + * Set ->fsx_xflags, ->fsx_valid and ->flags (translated xflags). */ void fileattr_fill_xflags(struct file_kattr *fa, u32 xflags) { - memset(fa, 0, sizeof(*fa)); fa->fsx_valid = true; fa->fsx_xflags = xflags; if (fa->fsx_xflags & FS_XFLAG_IMMUTABLE) @@ -48,11 +46,9 @@ EXPORT_SYMBOL(fileattr_fill_xflags); * @flags: FS_*_FL flags * * Set ->flags, ->flags_valid and ->fsx_xflags (translated flags). - * All other fields are zeroed. */ void fileattr_fill_flags(struct file_kattr *fa, u32 flags) { - memset(fa, 0, sizeof(*fa)); fa->flags_valid = true; fa->flags = flags; if (fa->flags & FS_SYNC_FL) @@ -325,7 +321,7 @@ int ioctl_setflags(struct file *file, unsigned int __user *argp) { struct mnt_idmap *idmap = file_mnt_idmap(file); struct dentry *dentry = file->f_path.dentry; - struct file_kattr fa; + struct file_kattr fa = {}; unsigned int flags; int err; @@ -357,7 +353,7 @@ int ioctl_fssetxattr(struct file *file, void __user *argp) { struct mnt_idmap *idmap = file_mnt_idmap(file); struct dentry *dentry = file->f_path.dentry; - struct file_kattr fa; + struct file_kattr fa = {}; int err; err = copy_fsxattr_from_user(&fa, argp); @@ -431,7 +427,7 @@ SYSCALL_DEFINE5(file_setattr, int, dfd, const char __user *, filename, struct path filepath __free(path_put) = {}; unsigned int lookup_flags = 0; struct file_attr fattr; - struct file_kattr fa; + struct file_kattr fa = {}; int error; BUILD_BUG_ON(sizeof(struct file_attr) < FILE_ATTR_SIZE_VER0); diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index 46e234863644..ed9b4846c05f 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -517,7 +517,7 @@ xfs_ioc_fsgetxattra( xfs_inode_t *ip, void __user *arg) { - struct file_kattr fa; + struct file_kattr fa = {}; xfs_ilock(ip, XFS_ILOCK_SHARED); xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa); -- 2.53.0