146 lines
4.1 KiB
C
146 lines
4.1 KiB
C
/* hNodeB shutdown FSM */
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/* (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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* Author: Pau Espin Pedrol <pespin@sysmocom.de>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <osmocom/core/fsm.h>
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#include <osmocom/core/tdef.h>
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#include <osmocom/hnodeb/hnb_shutdown_fsm.h>
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#include <osmocom/hnodeb/hnodeb.h>
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#include <osmocom/hnodeb/iuh.h>
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#define X(s) (1 << (s))
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#define hnb_shutdown_fsm_state_chg(fi, NEXT_STATE) \
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osmo_fsm_inst_state_chg(fi, NEXT_STATE, 0, 0)
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static void st_none_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
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{
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struct hnb *hnb = (struct hnb *)fi->priv;
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/* Reset state: */
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hnb->registered = false;
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hnb->rnc_id = 0;
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hnb_iuh_connect(hnb); /* Start reconnect once we are done with shutdown and we didn't exit process */
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}
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static void st_none(struct osmo_fsm_inst *fi, uint32_t event, void *data)
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{
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struct hnb *hnb = (struct hnb *)fi->priv;
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struct hnb_ue *ue, *ue_tmp;
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switch (event) {
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case HNB_SHUTDOWN_EV_START:
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/* TODO: here we may want to communicate to lower layers over UDsocket that we are shutting down...
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* TODO: Also, if Iuh link is still up, maybe send a Hnb deregister req towards HNBGW
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*/
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/* Drop active UE contexts, together with their GTP/AUDIO sessions: */
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llist_for_each_entry_safe(ue, ue_tmp, &hnb->ue_list, list)
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hnb_ue_free(ue);
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if (osmo_stream_cli_is_connected(hnb->iuh.client))
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osmo_stream_cli_close(hnb->iuh.client);
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hnb_shutdown_fsm_state_chg(fi, HNB_SHUTDOWN_ST_EXIT);
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break;
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}
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}
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static void st_exit_on_enter(struct osmo_fsm_inst *fi, uint32_t prev_state)
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{
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struct hnb *hnb = (struct hnb *)fi->priv;
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/* TODO: here we may want to signal the hnb object somehow that we have completed the shut down? */
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if (hnb->shutdown_fi_exit_proc) {
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LOGPFSML(fi, LOGL_NOTICE, "Shutdown process completed successfully, exiting process\n");
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exit(0);
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}
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hnb_shutdown_fsm_state_chg(fi, HNB_SHUTDOWN_ST_NONE);
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}
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static struct osmo_fsm_state hnb_shutdown_fsm_states[] = {
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[HNB_SHUTDOWN_ST_NONE] = {
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.in_event_mask =
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X(HNB_SHUTDOWN_EV_START),
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.out_state_mask =
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X(HNB_SHUTDOWN_ST_EXIT),
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.name = "NONE",
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.onenter = st_none_on_enter,
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.action = st_none,
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},
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[HNB_SHUTDOWN_ST_EXIT] = {
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.name = "EXIT",
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.out_state_mask =
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X(HNB_SHUTDOWN_ST_NONE),
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.onenter = st_exit_on_enter,
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}
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};
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const struct value_string hnb_shutdown_fsm_event_names[] = {
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OSMO_VALUE_STRING(HNB_SHUTDOWN_EV_START),
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{ 0, NULL }
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};
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int hnb_shutdown_fsm_timer_cb(struct osmo_fsm_inst *fi)
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{
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switch (fi->state) {
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default:
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OSMO_ASSERT(false);
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}
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return 0;
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}
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struct osmo_fsm hnb_shutdown_fsm = {
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.name = "HNB_SHUTDOWN",
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.states = hnb_shutdown_fsm_states,
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.num_states = ARRAY_SIZE(hnb_shutdown_fsm_states),
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.event_names = hnb_shutdown_fsm_event_names,
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.log_subsys = DMAIN,
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.timer_cb = hnb_shutdown_fsm_timer_cb,
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};
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static __attribute__((constructor)) void hnb_shutdown_fsm_init(void)
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{
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OSMO_ASSERT(osmo_fsm_register(&hnb_shutdown_fsm) == 0);
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}
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bool hnb_shutdown_in_progress(const struct hnb *hnb)
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{
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const struct osmo_fsm_inst *fi = hnb->shutdown_fi;
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return fi->state != HNB_SHUTDOWN_ST_NONE;
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}
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void hnb_shutdown(struct hnb *hnb, const char *reason, bool exit_proc)
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{
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struct osmo_fsm_inst *fi = hnb->shutdown_fi;
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if (hnb_shutdown_in_progress(hnb)) {
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LOGPFSML(fi, LOGL_NOTICE, "hNodeB is already being shutdown.\n");
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if (exit_proc)
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hnb->shutdown_fi_exit_proc = true;
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return;
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}
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hnb->shutdown_fi_exit_proc = exit_proc;
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LOGPFSML(fi, LOGL_NOTICE, "Shutting down hNodeB, exit %u, reason: %s\n",
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exit_proc, reason);
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osmo_fsm_inst_dispatch(fi, HNB_SHUTDOWN_EV_START, NULL);
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}
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