On 18/05/2020 22:37, Guoqing Jiang wrote:

quoted

That should work, however you really should check the return value of
lseek as well, while looking at this.

Okay, though I did not get complain about it =-O. Anyway, will send v3.

Just for info - I'm currently building my new system, which means my old 
system will become a raid testbed. And I'm playing with dm-integrity, 
which I believe returns an integrity error not a read error when things 
go wrong.

So yes, if errors aren't handled correctly I'm quite likely to find 
myself falling over them ...

Cheers,
Wol