[linuxdc-dev] Trapping exceptions in the kernel

[Adrian M. <ad...@mc...>]

Is there a way of doing this? I want to rewrite the vmufs driver to make it as 
independent of the underlying medium as possible and so I wanto to probe the 
size of the vmu.

An obvious way is to attempt to read in vmu sectors until this fails - eg at 
128, at 256, at 512, at 1024. (Working on the suggested likely sizes for 
alternative VMUs, assuming these things just might exist somewhere).

On a standard VMU 128 would succeed, 256 would fail and a simple check would 
then reveal that the superblock was in sector 255.

But a buffer read at 256 will oops the kernel in these circumstances - is 
there a mechanism to trap that exception?

Adrian