Re: 2.6: how do I this in sysfs?

[Greg KH <greg@kroah.com>]

On Mon, Aug 29, 2005 at 12:24:18PM -0500, Miller, Mike (OS Dev) wrote:
> 
> > This is after my minimal sas transport class, please also 
> > read the thread about it on linux-scsi
> > 
> In the referenced code for using sysfs, there only appear to be methods
> for reading attributes.  How about if we want to cause a command to
> get written out to the hardware?   Do we do something like this?
> 
>         /* get a semaphore keep everyone else out while we're working,
>            and hope like hell that all the other processes are playing
>            nice and using the semaphore too, or else we're hosed. */
> 
>         get_some_kind_of_semaphore();

try flock() on the /sys/blah/blah/ directory.  That should keep userspace happy.  
I think it only takes a small sysfs patch to make this work (or it might work
today, don't remember, sorry...)

Or look into using configfs instead.

thanks,

greg k-h