linux-ext4 - Re: [PATCH 1/2] fibmap: Warn and return an error in case of block > INT

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Message-ID: <20200424234647.GX6749@magnolia>
Date:   Fri, 24 Apr 2020 16:46:47 -0700
From:   "Darrick J. Wong" <darrick.wong@...cle.com>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     Ritesh Harjani <riteshh@...ux.ibm.com>,
        Eric Biggers <ebiggers@...nel.org>,
        linux-fsdevel@...r.kernel.org, linux-xfs@...r.kernel.org,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Christoph Hellwig <hch@...radead.org>,
        Jan Kara <jack@...e.com>, tytso@....edu,
        "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>,
        linux-ext4@...r.kernel.org
Subject: Re: [PATCH 1/2] fibmap: Warn and return an error in case of block >
 INT_MAX

On Fri, Apr 24, 2020 at 04:40:58PM -0700, Matthew Wilcox wrote:
> On Sat, Apr 25, 2020 at 04:24:24AM +0530, Ritesh Harjani wrote:
> > Ok, I see.
> > Let me replace WARN() with below pr_warn() line then. If no objections,
> > then will send this in a v2 with both patches combined as Darrick
> > suggested. - (with Reviewed-by tags of Jan & Christoph).
> > 
> > pr_warn("fibmap: this would truncate fibmap result\n");
> 
> We generally don't like userspace to be able to trigger kernel messages
> on demand, so they can't swamp the logfiles.  printk_ratelimited()?

Or WARN_ON_ONCE...

--D