Hi, I am trying to write a virtual device that pretty much does nothing but inserting itself between a disk device and the filesystem using the disk device (for now, but later will do some stuff). So it needs to sit in the normal path and pass everything down. Since it seemed to me that DRBD is the closest to what I'm trying to do, I took a look. I must admit that I'm not understanding the whole thing yet, but it uses bd_claim() & generic_make_request(), and a filesystem would be mounted on the virtual device. So I wonder if this is the way to go. It seems that if you use generic_make_request() in the virtual device, then you might have to go through the generic block layer twice, one on the way from the filesystem to the virtual device, and again on the way from the virtual device to the actual device. Am I understanding correct? Thanks in advance for any information. - Steve -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
