[Click] Passing information from user level application to Click kernel module

[Se Gi Hong]

Thanks for your all replies.

It seems that I gave wrong example. Actually, the application level will 
pass strings to the Click kernel module in run-time. I will look into 
write handler whether I can use the write handler in run-time.

Actually, I found one way to pass the information from application level 
to the Click kernel module. The way is using configure. Configure passes 
the information in run-time.

For example, test-mine.click has 
"FromDeivce(eth0)->myelement(1)->ToHost;", and it is running in runtime 
by using "click-install -u test-mine.click". If I want to pass other 
integer, I will change the test-mine.click to 
"FromDevice(eth0)->myelement(2)->ToHost;", and then I will run it by 
using "click-install test-mine.click". since the Click kernel module is 
already running and without "-u" option,  the command won't restart the 
module and it will only pass the "2".

Thanks,
SeGi.

Eddie Kohler wrote:
> Also realize that it is extremely unlikely that passing a filename to 
> the kenrel will be useful.  Lots of people seem to want to use fopen() 
> etc. in the kernel but you can't.  If you want to access file data and 
> you are not already a kernel programmer, then do it at user level.
>
> Eddie
>
>
> Roman Chertov wrote:
>> Se Gi Hong wrote:
>>> Hello all,
>>>
>>> I am running Click as a kernel module. I am wondering how to pass 
>>> information, such as file name and IP address, from the user level 
>>> to the Click in the kernel level. I am thinking of using syscall, 
>>> but I think there must be an alternative way. 
>>
>> You can use write handlers for that.  You can take a look at 
>> FastUPDSource kernel element.
>>
>> Roman
>>
>>> Thanks,
>>> SeGi
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>>
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