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Channels now can have external obstacles temporarily blocking their shutdown

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This commit is contained in:
Maria Matejka 2023-11-24 12:19:44 +01:00
parent e4e90c6f4d
commit f0da632b3c
2 changed files with 20 additions and 2 deletions
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17
nest/proto.c
View File

@ -745,7 +745,7 @@ channel_check_stopped(struct channel *c)
switch (c->channel_state)
{
case CS_STOP:
if (!EMPTY_LIST(c->roa_subscriptions) || c->out_req.hook || c->refeed_req.hook || c->in_req.hook || c->reload_req.hook)
if (c->obstacles || !EMPTY_LIST(c->roa_subscriptions) || c->out_req.hook || c->refeed_req.hook || c->in_req.hook || c->reload_req.hook)
return;
channel_set_state(c, CS_DOWN);
@ -753,7 +753,7 @@ channel_check_stopped(struct channel *c)
break;
case CS_PAUSE:
if (!EMPTY_LIST(c->roa_subscriptions) || c->out_req.hook || c->refeed_req.hook || c->reload_req.hook)
if (c->obstacles || !EMPTY_LIST(c->roa_subscriptions) || c->out_req.hook || c->refeed_req.hook || c->reload_req.hook)
return;
channel_set_state(c, CS_START);
@ -763,6 +763,19 @@ channel_check_stopped(struct channel *c)
DBG("%s.%s: Channel requests/hooks stopped (in state %s)\n", c->proto->name, c->name, c_states[c->channel_state]);
}
void
channel_add_obstacle(struct channel *c)
{
c->obstacles++;
}
void
channel_del_obstacle(struct channel *c)
{
if (!--c->obstacles)
channel_check_stopped(c);
}
void
channel_import_stopped(struct rt_import_request *req)
{

5
nest/protocol.h
View File

@ -605,6 +605,8 @@ struct channel {
u8 gr_lock; /* Graceful restart mechanism should wait for this channel */
u8 gr_wait; /* Route export to channel is postponed until graceful restart */
u32 obstacles; /* External obstacles remaining before cleanup */
btime last_state_change; /* Time of last state transition */
struct rt_export_request reload_req; /* Feeder for import reload */
@ -692,6 +694,9 @@ void channel_set_state(struct channel *c, uint state);
void channel_schedule_reload(struct channel *c, struct channel_import_request *cir);
int channel_import_request_prefilter(struct channel_import_request *cir_head, const net_addr *n);
void channel_add_obstacle(struct channel *c);
void channel_del_obstacle(struct channel *c);
static inline void channel_init(struct channel *c) { channel_set_state(c, CS_START); }
static inline void channel_open(struct channel *c) { channel_set_state(c, CS_UP); }
static inline void channel_close(struct channel *c) { channel_set_state(c, CS_STOP); }