From: Al Viro <viro@zeniv.linux.org.uk>
To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: matthew.garrett@nebula.com, yuchao0@huawei.com, tytso@mit.edu,
shaggy@kernel.org, ard.biesheuvel@linaro.org,
josef@toxicpanda.com, hch@infradead.org, clm@fb.com,
adilger.kernel@dilger.ca, jk@ozlabs.org, jack@suse.com,
dsterba@suse.com, jaegeuk@kernel.org, cluster-devel@redhat.com,
jfs-discussion@lists.sourceforge.net, linux-efi@vger.kernel.org,
Jan Kara <jack@suse.cz>,
reiserfs-devel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
linux-xfs@vger.kernel.org, linux-nilfs@vger.kernel.org,
linux-mtd@lists.infradead.org, ocfs2-devel@oss.oracle.com,
linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
linux-btrfs@vger.kernel.org
Subject: Re: [PATCH 2/5] vfs: create a generic checking function for FS_IOC_FSSETXATTR
Date: Wed, 26 Jun 2019 05:11:33 +0100 [thread overview]
Message-ID: <20190626041133.GB32272@ZenIV.linux.org.uk> (raw)
In-Reply-To: <156151633829.2283456.834142172527987802.stgit@magnolia>
On Tue, Jun 25, 2019 at 07:32:18PM -0700, Darrick J. Wong wrote:
> --- a/fs/btrfs/ioctl.c
> +++ b/fs/btrfs/ioctl.c
> @@ -373,10 +373,9 @@ static int check_xflags(unsigned int flags)
> static int btrfs_ioctl_fsgetxattr(struct file *file, void __user *arg)
> {
> struct btrfs_inode *binode = BTRFS_I(file_inode(file));
> - struct fsxattr fa;
> -
> - memset(&fa, 0, sizeof(fa));
> - fa.fsx_xflags = btrfs_inode_flags_to_xflags(binode->flags);
> + struct fsxattr fa = {
> + .fsx_xflags = btrfs_inode_flags_to_xflags(binode->flags),
> + };
Umm... Sure, there's no padding, but still - you are going to copy that thing
to userland... How about
static inline void simple_fill_fsxattr(struct fsxattr *fa, unsigned xflags)
{
memset(fa, 0, sizeof(*fa));
fa->fsx_xflags = xflags;
}
and let the compiler optimize the crap out?
next prev parent reply other threads:[~2019-06-26 4:12 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-26 2:32 [PATCH v3 0/5] vfs: clean up SETFLAGS and FSSETXATTR option processing Darrick J. Wong
2019-06-26 2:32 ` [PATCH 1/5] vfs: create a generic checking and prep function for FS_IOC_SETFLAGS Darrick J. Wong
2019-06-26 4:02 ` Al Viro
2019-06-26 15:30 ` Darrick J. Wong
2019-06-26 12:20 ` [Cluster-devel] " Bob Peterson
2019-06-26 2:32 ` [PATCH 2/5] vfs: create a generic checking function for FS_IOC_FSSETXATTR Darrick J. Wong
2019-06-26 4:11 ` Al Viro [this message]
2019-06-26 15:35 ` Darrick J. Wong
2019-06-26 15:43 ` Christoph Hellwig
2019-06-27 0:19 ` Darrick J. Wong
2019-06-26 2:32 ` [PATCH 3/5] vfs: teach vfs_ioc_fssetxattr_check to check project id info Darrick J. Wong
2019-06-26 2:32 ` [PATCH 4/5] vfs: teach vfs_ioc_fssetxattr_check to check extent size hints Darrick J. Wong
2019-06-26 2:32 ` [PATCH 5/5] vfs: only allow FSSETXATTR to set DAX flag on files and dirs Darrick J. Wong
2019-06-28 18:33 [PATCH v4 0/5] vfs: clean up SETFLAGS and FSSETXATTR option processing Darrick J. Wong
2019-06-28 18:34 ` [PATCH 2/5] vfs: create a generic checking function for FS_IOC_FSSETXATTR Darrick J. Wong
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