Communication between user process and kernel modules

[mokhtar]

Hi

What are the different solution to make a user process communicate with a kernel modules?

Whatis the the advantages and disadvanteges of each solutions ?

[linux-os (Dick Johnson)]

On Fri, 18 Jan 2008, mokhtar wrote:

>
> Hi
>
> What are the different solution to make a user process communicate with a
> kernel modules?
>
> Whatis the the advantages and disadvanteges of each solutions ?
>

ioctl() is the universal Unix mechanism for control of drivers
(modules). open(), close(), read(), write(), mmap() are the other
common methods. Some drivers may use sockets for communications.
I such a case, you use setsockopt() to change things.

Drivers can signal user-space processes as well. Such programs
use select() and poll().

>
> --

Cheers,
Dick Johnson
Penguin : Linux version 2.6.22.1 on an i686 machine (5588.29 BogoMips).
My book : http://www.AbominableFirebug.com/
_


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Thank you.
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[Salyzyn, Mark]

Other means of communications include sysfs and procfs. These have the advantage of supporting scripting and can survive ABI changes that can plague the other interfaces; but are meant for low-bandwidth or out-of-band configuration or simple status reporting.

Sincerely -- Mark Salyzyn

> -----Original Message-----
> From: linux-kernel-owner@...
> [mailto:linux-kernel-owner@...] On Behalf Of
> linux-os (Dick Johnson)
> Sent: Friday, January 18, 2008 9:59 AM
> To: mokhtar
> Cc: linux-kernel@...
> Subject: Re: Communication between user process and kernel modules
>
>
> On Fri, 18 Jan 2008, mokhtar wrote:
>
> >
> > Hi
> >
> > What are the different solution to make a user process
> communicate with a
> > kernel modules?
> >
> > Whatis the the advantages and disadvanteges of each solutions ?
> >
>
> ioctl() is the universal Unix mechanism for control of drivers
> (modules). open(), close(), read(), write(), mmap() are the other
> common methods. Some drivers may use sockets for communications.
> I such a case, you use setsockopt() to change things.
>
> Drivers can signal user-space processes as well. Such programs
> use select() and poll().
>
> >
> > --
>
> Cheers,
> Dick Johnson
> Penguin : Linux version 2.6.22.1 on an i686 machine (5588.29
> BogoMips).
> My book : http://www.AbominableFirebug.com/
> _
>
>
> ****************************************************************
> The information transmitted in this message is confidential
> and may be privileged.  Any review, retransmission,
> dissemination, or other use of this information by persons or
> entities other than the intended recipient is prohibited.  If
> you are not the intended recipient, please notify Analogic
> Corporation immediately - by replying to this message or by
> sending an email to DeliveryErrors@... - and destroy
> all copies of this information, including any attachments,
> without reading or disclosing them.
>
> Thank you.
> --
> To unsubscribe from this list: send the line "unsubscribe
> linux-kernel" in
> the body of a message to majordomo@...
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>

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[mokhtar]

What about netlink ?