LU counters

[Neels Hofmeyr]

Hi list,

I'm noticing an inaccuracy/ambiguity in the stat counters concerning Location Updating.
So far we have:

struct gsmnet_stats {

        struct {
                struct osmo_counter *reject; <-- inc when MM LU Reject is sent
                struct osmo_counter *accept; <-- inc when MM LU Accept is sent
        } loc_upd_resp;
}

Looks good? Well, not entirely.

(1)
When we use TMSIs, we first send a LU Accept with a new TMSI, and then expect
the MS to respond with a TMSI Realloc Complete message. When that fails to come
through, the LU actually ends in failure, even though a LU Accept was sent.

(2)
In 3G, if a UE sends an Iu Release during LU (e.g. user enables flight mode),
we cancel the LU without sending any reply at all, so nothing would be counted.

I would like to change the naming and inc hooks to reflect actual LU success or
failure. We don't need to count the actual messages sent, right?

~Neels

-- 
- Neels Hofmeyr <nhofmeyr at sysmocom.de>          http://www.sysmocom.de/
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