linux-kernel - Re: [PATCH] zfcp: add some internal zfcp adapter statistics

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Message-ID: <20071103094058.GA25134@osiris.boeblingen.de.ibm.com>
Date:	Sat, 3 Nov 2007 10:40:58 +0100
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Swen Schillig <swen@...t.ibm.com>
Cc:	James Bottomley <James.Bottomley@...eleye.com>,
	Christof Schmitt <christof.schmitt@...ibm.com>,
	linux-scsi@...r.kernel.org,
	Linux on 390 Port <LINUX-390@...marist.edu>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] zfcp: add some internal zfcp adapter statistics

> > +	if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)) {
> > +		ZFCP_LOG_NORMAL("error: Enhanced measurement feature not "
> > +				"supported");
> > +		return -EOPNOTSUPP;
> > +	}

Btw. any user can flood the console with these messages if the adapter
doesn't support the feature. That can be considered a denial of service
attack. Please just return -EOPNOTSUPP and don't print anything on the
console.
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