Xen devel - Jul 2008 - Some questions about Wrting XenStore Code!~~

Hi:
    I am  now writing code about using XenStore to write some (keys, values) on
Dom0.
    my code is as follows:

//filename: w_main.h


#include "w_xenstore.h"
//The "w_xenstore.h" is a header file I write myself

#include <x86_mm.h>

extern shared_info_t * shared_info;

int main(void)
{    
    /* Set up the XenStore driver */
    xenstore_init(start_info);
    /* Test the store */
    xenstore_test();
    /* Flush the console buffer */    
    
    return 0;
}
 
and I know that if I wanna use xenStore, I have to use shared_info_t *
shared_info. When I compile the code, it tells me that shared_info is not stated
before using.

my question is :
(1)
How to get a pointer to shared_info_t structure in my program (running in
Userspace)?

(2) I can not include "：hypercall-x86_32.h" and "x86_mm.h" ,
and I really can not find these two files on my machine.What is the problem?

Thanks a lot!

                                                                                
Danius Wu
===============================================================


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Hi,

To access XenStore from a userspace process, you should use the
functions in libxs, as can be found in $XEN_ROOT/tools/xenstore/xs.h.
The contents of xsls.c in the same directory should give you an idea
of how to connect to and use the store - note that you do not need the
shared_info_t structure or any direct hypercalls.

Regards,

Derek Murray.

2008/7/4 吴佳民 <wujiamin_tyut@163.com>:
> Hi:
>     I am  now writing code about using XenStore to write some (keys,
values)
> on Dom0.
>     my code is as follows:
>
> //filename: w_main.h
>
> #include "w_xenstore.h"
> //The "w_xenstore.h" is a header file I write myself
>
> #include <x86_mm.h>
>
> extern shared_info_t * shared_info;
>
> int main(void)
> {
>     /* Set up the XenStore driver */
>     xenstore_init(start_info);
>     /* Test the store */
>     xenstore_test();
>     /* Flush the console buffer */
>
>     return 0;
> }
>
> and I know that if I wanna use xenStore, I have to use shared_info_t *
> shared_info. When I compile the code, it tells me that shared_info is not
> stated before using.
>
> my question is :
> (1)
> How to get a pointer to shared_info_t structure in my program (running in
> Userspace)?
>
> (2) I can not include "：hypercall-x86_32.h" and
"x86_mm.h" , and I really
> can not find these two files on my machine.What is the problem?
>
> Thanks a lot!
>
>
> Danius Wu
> ===============================================================>
>
>
> ________________________________
> 350万起 独栋山墅
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>
>
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