Messages in this thread | | | Date | Mon, 30 Jan 2006 13:39:08 -0800 | From | Greg KH <> | Subject | Re: Right way to configure a driver? (sysfs, ioctl, proc, configfs,....) |
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On Mon, Jan 30, 2006 at 12:23:14PM +0100, Aritz Bastida wrote: > Thank you Antonio and Greg > But I still have one question pending: > > > > > > > 3.- Actually the most difficult config I must do is to pass three > > > values from userspace to my module. Specifically two integers and a > > > long (it's an offset to a memory zone I've previously defined) > > > > > > struct meminfo { > > > unsigned int id; /* segment identifier */ > > > unsigned int size; /* size of the memory area */ > > > unsigned long offset; /* offset to the information */ > > > }; > > > > > > How would you pass this information in sysfs? Three values in the same > > > file? Note that using three different files wouldn't be atomic, and I > > > need atomicity. > > > > > I guess I could pass three values on the same file, like this: > $ echo "5 1000 500" > meminfo > > I know that breaks the sysfs golden-rule, but how can I pass those > values _atomically_ then? Having three different files wouldn't be > atomic...
That's what configfs was created for. I suggest using that for things like this, as sysfs is not intended for it.
thanks,
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