deactivate RF + exit when the Abis link is gone

The idea is that the BTS process is re-spawned from init/upstart/systemd

include/osmo-bts/bts.h

@@ -6,6 +6,7 @@
 extern void *tall_bts_ctx;
 
 int bts_init(struct gsm_bts *bts);
+void bts_shutdown(struct gsm_bts *bts);
 
 struct gsm_bts *create_bts(uint8_t num_trx, char *id);
 int create_ms(struct gsm_bts_trx *trx, int maskc, uint8_t *maskv_tx,

include/osmo-bts/bts_model.h

@@ -31,4 +31,6 @@ int bts_model_rsl_chan_act(struct gsm_lchan *lchan, struct tlv_parsed *tp);
 int bts_model_rsl_chan_rel(struct gsm_lchan *lchan);
 int bts_model_rsl_deact_sacch(struct gsm_lchan *lchan);
 
+int bts_model_trx_deact_rf(struct gsm_bts_trx *trx);
+
 #endif

src/common/abis.c

@@ -513,5 +513,13 @@ void abis_close(struct ipabis_link *link)
 
 	if (osmo_timer_pending(&link->timer))
 		osmo_timer_del(&link->timer);
+
+	/* for now, we simply terminate the program and re-spawn */
+	if (link->bts)
+		bts_shutdown(link->bts);
+	else if (link->trx)
+		bts_shutdown(link->trx->bts);
+	else
+		exit(43);
 }
 

src/common/bts.c

@@ -56,6 +56,27 @@ int bts_init(struct gsm_bts *bts)
 	return bts_model_init(bts);
 }
 
+static void shutdown_timer_cb(void *data)
+{
+	exit(42);
+}
+
+static struct osmo_timer_list shutdown_timer = {
+	.cb = &shutdown_timer_cb,
+};
+
+void bts_shutdown(struct gsm_bts *bts)
+{
+	struct gsm_bts_trx *trx;
+
+	llist_for_each_entry(trx, &bts->trx_list, list)
+		bts_model_trx_deact_rf(trx);
+
+	/* shedule a timer to make sure select loop logic can run again
+	 * to dispatch any pending primitives */
+	osmo_timer_schedule(&shutdown_timer, 3, 0);
+}
+
 #if 0
 struct osmobts_lchan *lchan_by_channelnr(struct osmobts_trx *trx,
 	uint8_t channelnr)

src/osmo-bts-sysmo/bts_model.c

@@ -23,6 +23,8 @@
 #include <osmo-bts/oml.h>
 #include <osmo-bts/bts_model.h>
 
+#include "l1_if.h"
+
 int bts_model_rsl_chan_act(struct gsm_lchan *lchan, struct tlv_parsed *tp)
 {
 	uint8_t mode = *TLVP_VAL(tp, RSL_IE_CHAN_MODE);
@@ -44,3 +46,10 @@ int bts_model_rsl_deact_sacch(struct gsm_lchan *lchan)
 {
 	return lchan_deactivate_sacch(lchan);
 }
+
+int bts_model_trx_deact_rf(struct gsm_bts_trx *trx)
+{
+	struct femtol1_hdl *fl1 = trx_femtol1_hdl(trx);
+
+	return l1if_activate_rf(fl1, 0);
+}

src/osmo-bts-sysmo/l1_if.h

@@ -40,6 +40,7 @@ int l1if_req_compl(struct femtol1_hdl *fl1h, struct msgb *msg,
 struct femtol1_hdl *l1if_open(void *priv);
 int l1if_close(struct femtol1_hdl *hdl);
 int l1if_reset(struct femtol1_hdl *hdl);
+int l1if_activate_rf(struct femtol1_hdl *hdl, int on);
 
 struct msgb *l1p_msgb_alloc(void);
 struct msgb *sysp_msgb_alloc(void);

src/osmo-bts-sysmo/main.c

@@ -160,6 +160,8 @@ static void handle_options(int argc, char **argv)
 	}
 }
 
+static struct gsm_bts *bts;
+
 static void signal_handler(int signal)
 {
 	fprintf(stderr, "signal %u received\n", signal);
@@ -167,8 +169,7 @@ static void signal_handler(int signal)
 	switch (signal) {
 	case SIGINT:
 		//osmo_signal_dispatch(SS_GLOBAL, S_GLOBAL_SHUTDOWN, NULL);
-		sleep(3);
-		exit(0);
+		bts_shutdown(bts);
 		break;
 	case SIGABRT:
 	case SIGUSR1:
@@ -182,7 +183,6 @@ static void signal_handler(int signal)
 
 int main(int argc, char **argv)
 {
-	struct gsm_bts *bts;
 	struct ipabis_link *link;
 	void *tall_msgb_ctx;
 	int rc;