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cosmetic: lchan: introduce sub-struct lchan->release.* 

Put all lchan release related flags and settings in a sub-struct named
'release' to better indicate what those fields are for. There is no functional
change.

Change-Id: Icfddc6010e5d7c309f1a7ed3526b5b635ffeaf11
This commit is contained in:
Neels Hofmeyr 2018-11-06 21:39:15 +01:00
parent 5b1a7d1e9b
commit eee24eb964
4 changed files with 53 additions and 50 deletions
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28
include/osmocom/bsc/gsm_data.h
View File

@ -492,6 +492,8 @@ struct gsm_lchan {
uint8_t nr;
char *name;
char *last_error;
struct osmo_fsm_inst *fi;
struct osmo_fsm_inst *fi_rtp;
struct mgwep_ci *mgw_endpoint_ci_bts;
@ -510,21 +512,21 @@ struct gsm_lchan {
struct gsm_lchan *re_use_mgw_endpoint_from_lchan;
} activate;
/* If an event to release the lchan comes in while still waiting for responses, just mark this
* flag, so that the lchan will gracefully release at the next sensible junction. */
bool release_requested;
bool do_rr_release;
struct {
/* If an event to release the lchan comes in while still waiting for responses, just mark this
* flag, so that the lchan will gracefully release at the next sensible junction. */
bool requested;
bool do_rr_release;
char *last_error;
/* There is an RSL error cause of value 0, so we need a separate flag. */
bool in_error;
/* RSL error code, RSL_ERR_* */
uint8_t rsl_error_cause;
/* There is an RSL error cause of value 0, so we need a separate flag. */
bool release_in_error;
/* RSL error code, RSL_ERR_* */
uint8_t rsl_error_cause;
/* If a release event is being handled, ignore other ricocheting release events until that
* release handling has concluded. */
bool in_release_handler;
/* If a release event is being handled, ignore other ricocheting release events until that
* release handling has concluded. */
bool in_release_handler;
} release;
/* The logical channel type */
enum gsm_chan_t type;

4
src/osmo-bsc/bsc_subscr_conn_fsm.c
View File

@ -737,8 +737,8 @@ static void gscon_fsm_allstate(struct osmo_fsm_inst *fi, uint32_t event, void *d
break;
case GSCON_EV_RSL_CONN_FAIL:
if (conn->lchan) {
conn->lchan->release_in_error = true;
conn->lchan->rsl_error_cause = data ? *(uint8_t*)data : RSL_ERR_IE_ERROR;
conn->lchan->release.in_error = true;
conn->lchan->release.rsl_error_cause = data ? *(uint8_t*)data : RSL_ERR_IE_ERROR;
}
gscon_bssmap_clear(conn, GSM0808_CAUSE_RADIO_INTERFACE_FAILURE);
break;

63
src/osmo-bsc/lchan_fsm.c
View File

@ -485,7 +485,7 @@ static void lchan_fsm_unused(struct osmo_fsm_inst *fi, uint32_t event, void *dat
OSMO_ASSERT(!lchan->conn);
OSMO_ASSERT(!lchan->mgw_endpoint_ci_bts);
lchan_set_last_error(lchan, NULL);
lchan->release_requested = false;
lchan->release.requested = false;
lchan->conn = info->for_conn;
lchan->activate.activ_for = info->activ_for;
@ -557,7 +557,7 @@ static void lchan_fsm_wait_ts_ready_onenter(struct osmo_fsm_inst *fi, uint32_t p
struct gsm_lchan *lchan = lchan_fi_lchan(fi);
struct mgwep_ci *use_mgwep_ci = lchan_use_mgw_endpoint_ci_bts(lchan);
if (lchan->release_requested) {
if (lchan->release.requested) {
lchan_fail("Release requested while activating");
return;
}
@ -593,7 +593,7 @@ static void lchan_fsm_wait_ts_ready(struct osmo_fsm_inst *fi, uint32_t event, vo
case LCHAN_EV_RTP_RELEASED:
case LCHAN_EV_RTP_ERROR:
if (lchan->in_release_handler) {
if (lchan->release.in_release_handler) {
/* Already in release, the RTP is not the initial cause of failure.
* Just ignore. */
return;
@ -616,7 +616,7 @@ static void lchan_fsm_wait_activ_ack_onenter(struct osmo_fsm_inst *fi, uint32_t
uint8_t ho_ref = 0;
struct gsm_lchan *lchan = lchan_fi_lchan(fi);
if (lchan->release_requested) {
if (lchan->release.requested) {
lchan_fail_to(LCHAN_ST_UNUSED, "Release requested while activating");
return;
}
@ -653,12 +653,12 @@ static void lchan_fsm_wait_activ_ack(struct osmo_fsm_inst *fi, uint32_t event, v
break;
case LCHAN_EV_RSL_CHAN_ACTIV_NACK:
lchan->in_release_handler = true;
lchan->release.in_release_handler = true;
if (data) {
uint32_t next_state;
lchan->rsl_error_cause = *(uint8_t*)data;
lchan->release_in_error = true;
if (lchan->rsl_error_cause != RSL_ERR_RCH_ALR_ACTV_ALLOC)
lchan->release.rsl_error_cause = *(uint8_t*)data;
lchan->release.in_error = true;
if (lchan->release.rsl_error_cause != RSL_ERR_RCH_ALR_ACTV_ALLOC)
next_state = LCHAN_ST_BORKEN;
else
/* Taking this over from legacy code: send an RF Chan Release even though
@ -666,18 +666,18 @@ static void lchan_fsm_wait_activ_ack(struct osmo_fsm_inst *fi, uint32_t event, v
next_state = LCHAN_ST_WAIT_RF_RELEASE_ACK;
lchan_fail_to(next_state, "Chan Activ NACK: %s (0x%x)",
rsl_err_name(lchan->rsl_error_cause), lchan->rsl_error_cause);
rsl_err_name(lchan->release.rsl_error_cause), lchan->release.rsl_error_cause);
} else {
lchan->rsl_error_cause = RSL_ERR_IE_NONEXIST;
lchan->release_in_error = true;
lchan->release.rsl_error_cause = RSL_ERR_IE_NONEXIST;
lchan->release.in_error = true;
lchan_fail_to(LCHAN_ST_BORKEN, "Chan Activ NACK without cause IE");
}
lchan->in_release_handler = false;
lchan->release.in_release_handler = false;
break;
case LCHAN_EV_RTP_RELEASED:
case LCHAN_EV_RTP_ERROR:
if (lchan->in_release_handler) {
if (lchan->release.in_release_handler) {
/* Already in release, the RTP is not the initial cause of failure.
* Just ignore. */
return;
@ -698,7 +698,7 @@ static void lchan_fsm_post_activ_ack(struct osmo_fsm_inst *fi)
{
int rc;
struct gsm_lchan *lchan = lchan_fi_lchan(fi);
if (lchan->release_requested) {
if (lchan->release.requested) {
lchan_fail_to(LCHAN_ST_WAIT_RF_RELEASE_ACK, "Release requested while activating");
return;
}
@ -789,7 +789,7 @@ static void lchan_fsm_wait_rll_rtp_establish(struct osmo_fsm_inst *fi, uint32_t
case LCHAN_EV_RTP_RELEASED:
case LCHAN_EV_RTP_ERROR:
if (lchan->in_release_handler) {
if (lchan->release.in_release_handler) {
/* Already in release, the RTP is not the initial cause of failure.
* Just ignore. */
return;
@ -809,7 +809,7 @@ static void lchan_fsm_established_onenter(struct osmo_fsm_inst *fi, uint32_t pre
{
struct gsm_lchan *lchan = lchan_fi_lchan(fi);
if (lchan->release_requested) {
if (lchan->release.requested) {
lchan_fail("Release requested while activating");
return;
}
@ -896,7 +896,7 @@ static void lchan_fsm_established(struct osmo_fsm_inst *fi, uint32_t event, void
case LCHAN_EV_RTP_RELEASED:
case LCHAN_EV_RTP_ERROR:
if (lchan->in_release_handler) {
if (lchan->release.in_release_handler) {
/* Already in release, the RTP is not the initial cause of failure.
* Just ignore. */
return;
@ -929,7 +929,7 @@ static bool should_sacch_deact(struct gsm_lchan *lchan)
static void lchan_do_release(struct gsm_lchan *lchan)
{
if (lchan->do_rr_release && lchan->sapis[0] != LCHAN_SAPI_UNUSED)
if (lchan->release.do_rr_release && lchan->sapis[0] != LCHAN_SAPI_UNUSED)
gsm48_send_rr_release(lchan);
if (lchan->fi_rtp)
@ -1027,7 +1027,7 @@ static void lchan_fsm_wait_rf_release_ack(struct osmo_fsm_inst *fi, uint32_t eve
switch (event) {
case LCHAN_EV_RSL_RF_CHAN_REL_ACK:
if (lchan->rsl_error_cause)
if (lchan->release.in_error)
lchan_fsm_state_chg(LCHAN_ST_WAIT_AFTER_ERROR);
else
lchan_fsm_state_chg(LCHAN_ST_UNUSED);
@ -1055,7 +1055,7 @@ static void lchan_fsm_borken(struct osmo_fsm_inst *fi, uint32_t event, void *dat
case LCHAN_EV_RSL_CHAN_ACTIV_ACK:
/* A late Chan Activ ACK? Release. */
lchan->release_in_error = true;
lchan->release.in_error = true;
lchan_fsm_state_chg(LCHAN_ST_WAIT_RF_RELEASE_ACK);
return;
@ -1066,7 +1066,7 @@ static void lchan_fsm_borken(struct osmo_fsm_inst *fi, uint32_t event, void *dat
case LCHAN_EV_RSL_RF_CHAN_REL_ACK:
/* A late Release ACK? */
lchan->release_in_error = true;
lchan->release.in_error = true;
lchan_fsm_state_chg(LCHAN_ST_WAIT_AFTER_ERROR);
/* TODO: we used to do this only for sysmobts:
int do_free = is_sysmobts_v2(ts->trx->bts);
@ -1290,7 +1290,7 @@ int lchan_fsm_timer_cb(struct osmo_fsm_inst *fi)
return 0;
default:
lchan->release_in_error = true;
lchan->release.in_error = true;
lchan_fail("Timeout");
return 0;
}
@ -1302,25 +1302,26 @@ void lchan_release(struct gsm_lchan *lchan, bool do_rr_release,
if (!lchan || !lchan->fi)
return;
if (lchan->in_release_handler)
if (lchan->release.in_release_handler)
return;
lchan->in_release_handler = true;
lchan->release.in_release_handler = true;
struct osmo_fsm_inst *fi = lchan->fi;
lchan->release_in_error = err;
lchan->rsl_error_cause = cause_rr;
lchan->do_rr_release = do_rr_release;
lchan->release.in_error = err;
lchan->release.rsl_error_cause = cause_rr;
lchan->release.do_rr_release = do_rr_release;
/* States waiting for events will notice the desire to release when done waiting, so it is enough
* to mark for release. */
lchan->release_requested = true;
lchan->release.requested = true;
/* If we took the RTP over from another lchan, put it back. */
if (lchan->fi_rtp && lchan->release_in_error)
if (lchan->fi_rtp && lchan->release.in_error)
osmo_fsm_inst_dispatch(lchan->fi_rtp, LCHAN_RTP_EV_ROLLBACK, 0);
/* But when in error, don't wait for the next state to pick up release_requested. */
if (lchan->release_in_error) {
if (lchan->release.in_error) {
switch (lchan->fi->state) {
default:
/* Normally we signal release in lchan_fsm_wait_rll_rtp_released_onenter(). When
@ -1345,7 +1346,7 @@ void lchan_release(struct gsm_lchan *lchan, bool do_rr_release,
lchan_fsm_state_chg(LCHAN_ST_WAIT_RLL_RTP_RELEASED);
exit_release_handler:
lchan->in_release_handler = false;
lchan->release.in_release_handler = false;
}
void lchan_fsm_cleanup(struct osmo_fsm_inst *fi, enum osmo_fsm_term_cause cause)

8
src/osmo-bsc/lchan_rtp_fsm.c
View File

@ -256,7 +256,7 @@ static void lchan_rtp_fsm_wait_ipacc_crcx_ack_onenter(struct osmo_fsm_inst *fi,
int val;
struct gsm_lchan *lchan = lchan_rtp_fi_lchan(fi);
if (lchan->release_requested) {
if (lchan->release.requested) {
lchan_rtp_fail("Release requested while activating");
return;
}
@ -324,7 +324,7 @@ static void lchan_rtp_fsm_wait_ipacc_mdcx_ack_onenter(struct osmo_fsm_inst *fi,
struct gsm_lchan *lchan = lchan_rtp_fi_lchan(fi);
const struct mgcp_conn_peer *mgw_rtp;
if (lchan->release_requested) {
if (lchan->release.requested) {
lchan_rtp_fail("Release requested while activating");
return;
}
@ -439,7 +439,7 @@ static void lchan_rtp_fsm_wait_mgw_endpoint_configured_onenter(struct osmo_fsm_i
struct gsm_lchan *lchan = lchan_rtp_fi_lchan(fi);
struct gsm_lchan *old_lchan = lchan->activate.re_use_mgw_endpoint_from_lchan;
if (lchan->release_requested) {
if (lchan->release.requested) {
lchan_rtp_fail("Release requested while activating");
return;
}
@ -724,7 +724,7 @@ static const struct value_string lchan_rtp_fsm_event_names[] = {
int lchan_rtp_fsm_timer_cb(struct osmo_fsm_inst *fi)
{
struct gsm_lchan *lchan = lchan_rtp_fi_lchan(fi);
lchan->release_in_error = true;
lchan->release.in_error = true;
lchan_rtp_fail("Timeout");
return 0;
}