Change in osmo-msc[master]: tweak fsm_msc_mgcp FSM and FI name

[Neels Hofmeyr]

Neels Hofmeyr has uploaded this change for review. ( https://gerrit.osmocom.org/12403


Change subject: tweak fsm_msc_mgcp FSM and FI name
......................................................................

tweak fsm_msc_mgcp FSM and FI name

Instead of

  MGW(MGW_99)

use a name of

  msc-mgcp(MSISDN:2331_GERAN_A:00000017_trans99)

1. The FSM is communication towards an MGW, not the MGW itself. When reading
combined logging (gsmtap_log), it is confusing to read 'MGW' in a log coming
from the MSC. The API is also called msc_mgcp_*.

2. Calling the FSM instance 'MGW_' again doesn't make sense.

3. Indicate 'trans' before the trans_id (trans_id was already shown, but not
indicated what it was).

4. Also indicate the actual subscriber's identification.

5. Also indicate the RAN connection and conn_id.

This comes up while trying to understand a call coming in on an already
established call: parsing the log with a human brain is near torture without
this info, taking extremely long to get grips on.

Change-Id: Ie5fc1ffb7eba0209fee4666a075655cd24d27473
---
M src/libmsc/msc_mgcp.c
1 file changed, 4 insertions(+), 6 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-msc refs/changes/03/12403/1

diff --git a/src/libmsc/msc_mgcp.c b/src/libmsc/msc_mgcp.c
index 46b8b02..259fdfc 100644
--- a/src/libmsc/msc_mgcp.c
+++ b/src/libmsc/msc_mgcp.c
@@ -943,7 +943,7 @@
 
 /* State machine definition */
 static struct osmo_fsm fsm_msc_mgcp = {
-	.name = "MGW",
+	.name = "msc-mgcp",
 	.states = fsm_msc_mgcp_states,
 	.num_states = ARRAY_SIZE(fsm_msc_mgcp_states),
 	.log_subsys = DMGCP,
@@ -979,7 +979,6 @@
 int msc_mgcp_call_assignment(struct gsm_trans *trans)
 {
 	struct mgcp_ctx *mgcp_ctx;
-	char name[32];
 	static bool fsm_registered = false;
 	struct ran_conn *conn;
 	struct mgcp_client *mgcp;
@@ -1009,9 +1008,6 @@
 		conn->iu.rab_id = next_iu_rab_id++;
 #endif
 
-	if (snprintf(name, sizeof(name), "MGW_%i", trans->transaction_id) >= sizeof(name))
-		return -EINVAL;
-
 	/* Register the fsm description (if not already done) */
 	if (fsm_registered == false) {
 		osmo_fsm_register(&fsm_msc_mgcp);
@@ -1028,8 +1024,10 @@
 		     vlr_subscr_name(trans->vsub), ENDPOINT_ID);
 		return -EINVAL;
 	}
-	mgcp_ctx->fsm = osmo_fsm_inst_alloc(&fsm_msc_mgcp, NULL, NULL, LOGL_DEBUG, name);
+	mgcp_ctx->fsm = osmo_fsm_inst_alloc(&fsm_msc_mgcp, NULL, NULL, LOGL_DEBUG, NULL);
 	OSMO_ASSERT(mgcp_ctx->fsm);
+	osmo_fsm_inst_update_id_f(mgcp_ctx->fsm, "%s_%s_trans%d",
+				  vlr_subscr_name(trans->vsub), ran_conn_get_conn_id(conn), trans->transaction_id);
 	mgcp_ctx->fsm->priv = mgcp_ctx;
 	mgcp_ctx->mgcp = mgcp;
 	mgcp_ctx->trans = trans;

-- 
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Gerrit-Project: osmo-msc
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Ie5fc1ffb7eba0209fee4666a075655cd24d27473
Gerrit-Change-Number: 12403
Gerrit-PatchSet: 1
Gerrit-Owner: Neels Hofmeyr <nhofmeyr at sysmocom.de>
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