linux-kernel - Re: [PATCH 013 of 20] knfsd: nfsd: factor out code from show

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Message-Id: <20070713002933.f15724a7.akpm@linux-foundation.org>
Date:	Fri, 13 Jul 2007 00:29:33 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	NeilBrown <neilb@...e.de>
Cc:	nfs@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	"J. Bruce Fields" <bfields@...i.umich.edu>
Subject: Re: [PATCH 013 of 20] knfsd: nfsd: factor out code from
 show_expflags

On Tue, 10 Jul 2007 12:27:37 +1000 NeilBrown <neilb@...e.de> wrote:

> +static void exp_flags(struct seq_file *m, int flag, int fsid,
> +		uid_t anonu, uid_t anong, struct nfsd4_fs_locations *fsloc)
> +{
> +	show_expflags(m, flag, NFSEXP_ALLFLAGS);
>  	if (flag & NFSEXP_FSID)
> -		seq_printf(m, "%sfsid=%d", first++?",":"", fsid);
> +		seq_printf(m, ",fsid=%d", fsid);
>  	if (anonu != (uid_t)-2 && anonu != (0x10000-2))
> -		seq_printf(m, "%sanonuid=%d", first++?",":"", anonu);
> +		seq_printf(m, ",sanonuid=%d", anonu);

It's a bit presumptuous to print a uid_t with "%d".  Fortunately it
will work OK with all the present architectures.

But in general: be cautious when feeding opaque types to printk.
-
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