[PATCH] Cache EF-PNN, EF-OPL sim files on disk.

[andrzej zaborowski]

2009/7/18 Denis Kenzior <denkenz at gmail.com>:
> However, not all files can be updated by the user.  Namely files with the 'ADM'
> for UPDATE access condition.  The only way they can be changed is at a service
> center.
>
> What do you think of transparently caching only such files?  This would include
> the ones we're really interested in caching anyway, namely EFspn, EFpnn,
> EFopl, EFust, etc.

True, I was going to add code or a TODO in ofono_sim_write() to
invalidate cache but it's a good point about updating outside ofono
control.  I now added a parameter to ofono_sim_read() to indicate that
a file can be cached on disk, making it a little less transparent.  In
previous version I had separate entry points for cached read.

>
> If we decide to do this, we should store them in /var/lib/ instead of
> /var/cache, since these files will be stored semi-permanently.

Ok, changed.  There's also a standard path /var/state, I don't know if
it's better or worse.

I should note that the cached reads can change the callback order
because they will skip simop_q queue in sim.c.

Regards
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