linux-kernel - Re: [PATCH 1/4] vfs: create a generic checking function for FS_IOC

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Date:   Tue, 25 Jun 2019 19:12:54 +0200
From:   David Sterba <dsterba@...e.cz>
To:     "Darrick J. Wong" <darrick.wong@...cle.com>
Cc:     matthew.garrett@...ula.com, yuchao0@...wei.com, tytso@....edu,
        shaggy@...nel.org, ard.biesheuvel@...aro.org, josef@...icpanda.com,
        clm@...com, adilger.kernel@...ger.ca, jk@...abs.org, jack@...e.com,
        dsterba@...e.com, jaegeuk@...nel.org, viro@...iv.linux.org.uk,
        cluster-devel@...hat.com, jfs-discussion@...ts.sourceforge.net,
        linux-efi@...r.kernel.org, Jan Kara <jack@...e.cz>,
        reiserfs-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, linux-xfs@...r.kernel.org,
        linux-nilfs@...r.kernel.org, linux-mtd@...ts.infradead.org,
        ocfs2-devel@....oracle.com, linux-fsdevel@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-btrfs@...r.kernel.org
Subject: Re: [PATCH 1/4] vfs: create a generic checking function for
 FS_IOC_SETFLAGS

On Fri, Jun 21, 2019 at 04:56:21PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@...cle.com>
> 
> Create a generic checking function for the incoming FS_IOC_SETFLAGS flag
> values so that we can standardize the implementations that follow ext4's
> flag values.

I checked a few samples what's the type of the flags, there are unsigned
types while the proposed VFS functions take signed type.

> +int vfs_ioc_setflags_check(struct inode *inode, int oldflags, int flags);

Specifically ext4 uses unsigned type and his was the original API that
got copied so I'd think that it should unsigned everywhere.

>  fs/btrfs/ioctl.c    |   13 +++++--------

For the btrfs bits

Acked-by: David Sterba <dsterba@...e.com>

and besides the signedness, the rest of the changes look good to me.