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 9E38C199FAB; Sat, 25 Apr 2026 01:53:26 +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=1777082006; cv=none; b=pXTfnLdS/pc5SBw9lZ1eboNj5cPCW/BeD598svVav6+1SVpdwoUER5JXNocVE9z6v9wErMpPhPSl8pQrKgIFbS9d/EmNCgquuDC/D3ZAvVsb/B35gjUMI305s5zWEdJWh9KDru2B4zqY2Ot3Tb6HAvnWUkL5CDjUVFD+r3e5+xU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777082006; c=relaxed/simple; bh=93lkf1HBQv1pjT23tKqszLwADekuVqw95GHVpFk/qSc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=G6sepbULFPmcmAmoOgwvhsXlmWToFoO7nrOD/VoHF0G0eZ/zSHfODxEk5EKL4bjZjs0vPM/hcU0tXmNF633BC4DXBchEQDxk+TWJ6qXIEcBUAmGxggcLO5qGlHVX7BfDQ9m/3ulzkWcJG5KuRutJJBKJOBYslgObd39KSZGnUvw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gLgar0Jl; 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="gLgar0Jl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 16CBDC2BCB9; Sat, 25 Apr 2026 01:53:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777082006; bh=93lkf1HBQv1pjT23tKqszLwADekuVqw95GHVpFk/qSc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=gLgar0JlfMzpbf4h91bIQ2/oFxbB7DQVGd6O1qEFahj9FGQOAfeyXajR/xwkwjAt+ ihSFQ6DYf8y4gaEi8CH34lbpMLIkYx6hmSb0bVCOlrjLntSjKUThEH076NVG2YjU/x AEwjOo54XLJBzPOEixPYwdanXVwtZHgHcf6psGz5nZjZioUs/NrbIsNCQm63ji4U4r VJREGv7tZdYjV9lcrKYxPirABgUpJn23YTprhJFNlXTs6mX7/8oaE8mGfScEhADRQl IsmY+0rZm54pPYdQ2t48PsCb7AA/MyJCVNnJ3BXYbLvjMbkJoNY5FCgd4ibEr4xEAO ZPlhMkWL62A4Q== From: Chuck Lever Date: Fri, 24 Apr 2026 21:53:03 -0400 Subject: [PATCH v11 01/15] fs: Move file_kattr initialization to callers Precedence: bulk X-Mailing-List: linux-api@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: <20260424-case-sensitivity-v11-1-de5619beddaf@oracle.com> References: <20260424-case-sensitivity-v11-0-de5619beddaf@oracle.com> In-Reply-To: <20260424-case-sensitivity-v11-0-de5619beddaf@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+XAcsmYgBp7B6QVc6wzpY9y1nPJJFj5Jdl4iXMAz76LGW6g QkQqdisSOGJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaewekAAKCRAzarMzb2Z/ l48ZD/95d8pCbGgiAP60eaV3lvhqpJjBSSgyy5uBrXc6hOSYY7Rn4m4SC1Lmsvv7v1z4LUWF1zI Ez9rxr0ebHLjWUnGXRzmXFmrsylzHuPqTBVeFSSAUNhZL1zVI5CH79+XChwlj+K8kWlmpyE/4Ad xE68yIWjWCTtMwfuo9u985OatxMY4Fh9AqB6FpRF21dmTUBI6JpT3RSr9DjiSCCIa3loQuHNUD4 EpB0tp33RZUoFIDqosozztV0Z/YS5czglE6kL2loY9CX/sR4pbtmgqpe9zaD8TNsb7JESzaBIJ2 6ri4qY6CnkBm7zd9Rn2b/BWfCVl7X93O/HqukK3RRUadCopSGvibhD9iM/uzOwPpJKqincRl4/S 0lvSxRbuBosTWj+JDPDIXOvQfR/UWojct3gI7nkqAPhe1R8JIfZJdxrxWa4xziItVi5WXqVTLSS zuRANrBRobLYHPXza3AKZqd0Qk1KYWEy8/qeWe+++YRfcjlFlT6tt0FpMos+fsRbUxATRkbIqsY hGCmQQpvf7Q5rWYay7vCY6L/DvkcAuWh+QBab+0xU8OYIu2oPn15rml0RCC6Xs24uMTw+hTEjSr wXIkQuTJCnXk6bVxqkk31fdz5WxqggdoqLLhKWRzRVCpWAQFGtHpAQt1Woqhvb6cso9F7u3W5wC 4T7+ODkEGqSN0Ww== 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