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ntp: reuse pool IDs for new pools

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When adding a new pool, reuse unused pool IDs to avoid increasing the
pools array.
This commit is contained in:
Miroslav Lichvar 2020-08-10 12:14:42 +02:00
parent d274fe44da
commit 0a63ad95ce
1 changed files with 35 additions and 3 deletions
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38
ntp_sources.c
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@ -609,6 +609,31 @@ remove_unresolved_source(struct UnresolvedSource *us)
/* ================================================== */
static int get_unused_pool_id(void)
{
struct UnresolvedSource *us;
int i;
for (i = 0; i < ARR_GetSize(pools); i++) {
if (get_pool(i)->sources > 0)
continue;
/* Make sure there is no name waiting to be resolved using this pool */
for (us = unresolved_sources; us; us = us->next) {
if (us->pool_id == i)
break;
}
if (us)
continue;
return i;
}
return INVALID_POOL;
}
/* ================================================== */
NSR_Status
NSR_AddSource(NTP_Remote_Address *remote_addr, NTP_Source_Type type,
SourceParameters *params, uint32_t *conf_id)
@ -635,7 +660,7 @@ NSR_AddSourceByName(char *name, int port, int pool, NTP_Source_Type type,
struct UnresolvedSource *us;
struct SourcePool *sp;
NTP_Remote_Address remote_addr;
int i, new_sources;
int i, new_sources, pool_id;
/* If the name is an IP address, don't bother with full resolving now
or later when trying to replace the source */
@ -663,12 +688,19 @@ NSR_AddSourceByName(char *name, int port, int pool, NTP_Source_Type type,
us->address = remote_addr;
new_sources = 1;
} else {
sp = (struct SourcePool *)ARR_GetNewElement(pools);
pool_id = get_unused_pool_id();
if (pool_id != INVALID_POOL) {
sp = get_pool(pool_id);
} else {
sp = ARR_GetNewElement(pools);
pool_id = ARR_GetSize(pools) - 1;
}
sp->sources = 0;
sp->unresolved_sources = 0;
sp->confirmed_sources = 0;
sp->max_sources = CLAMP(1, params->max_sources, MAX_POOL_SOURCES);
us->pool_id = ARR_GetSize(pools) - 1;
us->pool_id = pool_id;
us->address.ip_addr.family = IPADDR_UNSPEC;
new_sources = MIN(2 * sp->max_sources, MAX_POOL_SOURCES);
}