From: Greg KH <greg@kroah.com>
To: WyoFlippa <wyoflippa@gmail.com>
Cc: kernelnewbies@kernelnewbies.org
Subject: Re: Kernel drivers and IOCTLs
Date: Wed, 22 Jan 2020 20:04:33 +0100 [thread overview]
Message-ID: <20200122190433.GA64264@kroah.com> (raw)
In-Reply-To: <8969dfce-a295-c351-201c-4d8a0e90ac58@gmail.com>
On Tue, Jan 21, 2020 at 10:27:01PM -0600, WyoFlippa wrote:
> Hi,
>
> I'm working on a driver that would verify a Linux or U-Boot image is secure
> and I need to pass parameters such as the public key, starting address, etc.
> I'd heard in talking to developers that IOCTLs are frowned upon. I also
> found this article that seems to indicate that using sysfs or proc is a
> better way to go.
>
> https://www.linuxjournal.com/article/8110
>
>
> but then I see this article from 2013 which is more recent than the article.
>
> https://www.kernel.org/doc/html/latest/process/botching-up-ioctls.html
>
>
> So are IOCTLs discouraged or not?
They are discouraged, except when they are necessary :)
It all depends on exactly what you are trying to do.
greg k-h
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next prev parent reply other threads:[~2020-01-22 19:06 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-22 4:27 Kernel drivers and IOCTLs WyoFlippa
2020-01-22 19:04 ` Greg KH [this message]
2020-01-23 16:49 ` Valdis Klētnieks
2020-02-05 2:57 ` WyoFlippa
2020-02-05 4:01 ` Valdis Klētnieks
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