[uml-devel] UML: Access to a host device from UML

[uml-devel] UML: Access to a host device from UML

[Pablo Pessolani]

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Hi:
        I wrote an IPC mechanism as a Linux kernel module. The access to their services is through a dummy character device called /dev/dvk using ioctl(). Therefore, only open(), ioctl() and close() system calls are used.
        How can a process running within an UML Guest access the /dev/dvk host device?  (humfs??)
        The idea is to communicate two o more UML instances through this IPC mechanism.
        Thanks in advance.
Regards.
PAP


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Re: [uml-devel] UML: Access to a host device from UML

[Anton Ivanov]

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I do not think that this is possible without an additional device in the 
UML itself.


In fact, if you want two processes in two different UML instances to 
communicate in-between themselves you should aim at a UML device. The 
kernel device is probably suprlus to requirements as the two UML 
instances can communicate between themselves within the host userspace 
using any of the mechanisms available for that.


A.


On 2/20/19 6:36 PM, Pablo Pessolani wrote:
> Hi:
> � � � � I wrote an IPC mechanism as a Linux kernel module. The access 
> to their services is through a dummy character device called /dev/dvk 
> using ioctl(). Therefore, only open(), ioctl() and close() system 
> calls are used.
> � � � � How can a process running within an UML Guest access the 
> /dev/dvk host device?� (humfs??)
> � � � � The idea is to communicate two o more UML instances through 
> this IPC mechanism.
> � � � � Thanks in advance.
> Regards.
> PAP
>
>
>
> _______________________________________________
> User-mode-linux-devel mailing list
> User-mode-linux-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel

-- 
Anton R Ivanov

http://www.kot-begemot.co.uk


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