linux-kernel - Re: [PATCH v6 06/24] erofs: support special inode

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Date:   Sun, 1 Sep 2019 17:39:13 +0800
From:   Gao Xiang <hsiangkao@....com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Gao Xiang <gaoxiang25@...wei.com>, Jan Kara <jack@...e.cz>,
        Dave Chinner <david@...morbit.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Miao Xie <miaoxie@...wei.com>, devel@...verdev.osuosl.org,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        "Darrick J . Wong" <darrick.wong@...cle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Amir Goldstein <amir73il@...il.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Theodore Ts'o <tytso@....edu>, Pavel Machek <pavel@...x.de>,
        David Sterba <dsterba@...e.cz>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-fsdevel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-erofs@...ts.ozlabs.org
Subject: Re: [PATCH v6 06/24] erofs: support special inode

Hi Christoph,

On Thu, Aug 29, 2019 at 03:25:03AM -0700, Christoph Hellwig wrote:
> On Fri, Aug 02, 2019 at 08:53:29PM +0800, Gao Xiang wrote:
> > This patch adds to support special inode, such as
> > block dev, char, socket, pipe inode.
> > 
> > Signed-off-by: Gao Xiang <gaoxiang25@...wei.com>
> > ---
> >  fs/erofs/inode.c | 27 +++++++++++++++++++++++++--
> >  1 file changed, 25 insertions(+), 2 deletions(-)
> > 
> > diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c
> > index b6ea997bc4ae..637bf6e4de44 100644
> > --- a/fs/erofs/inode.c
> > +++ b/fs/erofs/inode.c
> > @@ -34,7 +34,16 @@ static int read_inode(struct inode *inode, void *data)
> >  		vi->xattr_isize = ondisk_xattr_ibody_size(v2->i_xattr_icount);
> >  
> >  		inode->i_mode = le16_to_cpu(v2->i_mode);
> > -		vi->raw_blkaddr = le32_to_cpu(v2->i_u.raw_blkaddr);
> > +		if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
> > +		    S_ISLNK(inode->i_mode))
> > +			vi->raw_blkaddr = le32_to_cpu(v2->i_u.raw_blkaddr);
> > +		else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
> > +			inode->i_rdev =
> > +				new_decode_dev(le32_to_cpu(v2->i_u.rdev));
> > +		else if (S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode))
> > +			inode->i_rdev = 0;
> > +		else
> > +			return -EIO;
> 
> Please use a switch statement when dealing with the file modes to
> make everything easier to read.

Fixed in
https://lore.kernel.org/linux-fsdevel/20190901055130.30572-18-hsiangkao@aol.com/

Thanks,
Gao Xiang