/*
* Free a map.
*/
void
mapc_free(mnt_map *m)
{
/*
* Decrement the reference count.
* If the reference count hits zero
* then throw the map away.
*/
if (m && --m->refc == 0) {
mapc_clear(m);
free((void *)m->map_name);
rem_que(&m->hdr);
free((void *)m);
}
}
/*
* Get map cache in sync with physical representation
*/
static void
mapc_sync(mnt_map *m)
{
if (m->alloc != MAPC_ROOT) {
mapc_clear(m);
if (m->alloc >= MAPC_ALL)
if (mapc_reload_map(m))
m->alloc = MAPC_INC;
/*
* Attempt to find the wildcard entry
*/
if (m->alloc < MAPC_ALL)
mapc_find_wildcard(m);
}
}
/*
* Do a map reload.
* Attempt to reload without losing current data by switching the hashes
* round.
* If reloading was needed and succeeded, return 1; else return 0.
*/
static int
mapc_reload_map(mnt_map *m)
{
int error, ret = 0;
kv *maphash[NKVHASH];
time_t t;
error = (*m->mtime) (m, m->map_name, &t);
if (error) {
t = m->modify;
}
/*
* skip reloading maps that have not been modified, unless
* amq -f was used (do_mapc_reload is 0)
*/
if (m->reloads != 0 && do_mapc_reload != 0) {
if (t <= m->modify) {
plog(XLOG_INFO, "reload of map %s is not needed (in sync)", m->map_name);
dlog("map %s last load time is %d, last modify time is %d",
m->map_name, (int) m->modify, (int) t);
return ret;
}
}
/* copy the old hash and zero the map */
memcpy((voidp) maphash, (voidp) m->kvhash, sizeof(m->kvhash));
memset((voidp) m->kvhash, 0, sizeof(m->kvhash));
dlog("calling map reload on %s", m->map_name);
m->nentries = 0;
error = (*m->reload) (m, m->map_name, mapc_add_kv);
if (error) {
if (m->reloads == 0)
plog(XLOG_FATAL, "first time load of map %s failed!", m->map_name);
else
plog(XLOG_ERROR, "reload of map %s failed - using old values",
m->map_name);
mapc_clear(m);
memcpy((voidp) m->kvhash, (voidp) maphash, sizeof(m->kvhash));
} else {
if (m->reloads++ == 0)
plog(XLOG_INFO, "first time load of map %s succeeded", m->map_name);
else
plog(XLOG_INFO, "reload #%d of map %s succeeded",
m->reloads, m->map_name);
mapc_clear_kvhash(maphash);
if (m->wildcard) {
XFREE(m->wildcard);
m->wildcard = NULL;
}
m->modify = t;
ret = 1;
}
dlog("calling mapc_search for wildcard");
error = mapc_search(m, wildcard, &m->wildcard);
if (error)
m->wildcard = NULL;
return ret;
}
