linux-kernel - Re: [RFC PATCH 3/8] block: Add kernel APIs to create & delete block device LED triggers

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Message-ID: <36b97f0a-b435-24fa-df2e-f507a4971bd6@gmail.com>
Date:   Thu, 29 Jul 2021 11:16:43 -0500
From:   Ian Pilcher <arequipeno@...il.com>
To:     Valdis Klētnieks <valdis.kletnieks@...edu>
Cc:     linux-block@...r.kernel.org, linux-leds@...r.kernel.org,
        axboe@...nel.dk, pavel@....cz, linux-kernel@...r.kernel.org,
        kernelnewbies@...nelnewbies.org
Subject: Re: [RFC PATCH 3/8] block: Add kernel APIs to create & delete block
 device LED triggers

On 7/28/21 10:45 PM, Valdis Klētnieks wrote:
> Is pr_warn() the right level for this stuff? I'd think this sort of pilot error should
> be pr_info() or even pr_debug(), if mentioned at all.  pr_warn() would be for
> something like an unexpected situation like trying to blink an LED but failing.
> Simple syntax errors should probably just toss a -EINVAL and return.

Fair point.  I'll change it to pr_info().  I'm reluctant to completely
"swallow" the error message, as I've been on the other side as a system
administrator trying to guess at the reason for an error code.

> (Among other things, this allows a userspace script to spam the
> log by simply repeatedly trying to create the same entry)

Only root, and they've got plenty of ways to do that.

Thanks!

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