[dm-devel] multipath disk size

[URZ- AG]

Christophe Varoqui wrote:

>>
> Thanks for this report.
>
> I can't reproduce this here.
>
> I'm afraid I'll have to ask you to try and refine your report though.
> Use a debugger to track [m]pp->size changes, or try adding debugging 
> output in the key code areas : add_map_with_path(), coalesce_paths(), ...
>
> Regards,
> cvaroqui
>
Hello Christophe,

I'm not a C Guru but i think i have been able to track it down.
It seems that when discovering the device for paths after the get_serial 
(discovery.c) function the size has changed.
I've entered two debug entries in  scsi_ioctl_pathinfo() which prints 
out  pp->size, one before get_serial call and one after and the size has 
changed when the second print its value. So far I've seen, this function 
should not change anything to the size, but it seems to write to that 
pointer, could it be that this function writes out of a buffer size?
I'm not comfortable with the debugger so I have not been able to debug 
that in deep.
It would be great if  you could give me some more instructions on how to 
analyze/debug it .

Regards,
Arsène