int lookup_ghost(const char *root, int ghost, time_t now, void *context)
{
struct lookup_context *ctxt = (struct lookup_context *) context;
struct mapent_cache *me;
struct stat st;
int status = 1;
if (!read_map(root, now, ctxt))
return LKP_FAIL;
if (stat(ctxt->mapname, &st)) {
crit(MODPREFIX "file map %s, could not stat",
ctxt->mapname);
return 1;
}
ctxt->mtime = st.st_mtime;
status = cache_ghost(root, ghost, ctxt->mapname, "file", ctxt->parse);
me = cache_lookup_first();
/* me NULL => empty map */
if (me == NULL)
return LKP_FAIL;
if (*me->key == '/' && *(root + 1) != '-') {
me = cache_partial_match(root);
/*
* me NULL => no entries for this direct mount
* root or indirect map
*/
if (me == NULL)
return LKP_FAIL | LKP_INDIRECT;
}
return status;
}
static int check_map_indirect(struct autofs_point *ap,
char *key, int key_len,
struct lookup_context *ctxt)
{
struct map_source *source;
struct mapent_cache *mc;
struct mapent *me;
time_t now = time(NULL);
time_t t_last_read;
int ret, cur_state;
source = ap->entry->current;
ap->entry->current = NULL;
master_source_current_signal(ap->entry);
mc = source->mc;
master_source_current_wait(ap->entry);
ap->entry->current = source;
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cur_state);
ret = lookup_one(ap, key, key_len, ctxt);
if (ret == NSS_STATUS_NOTFOUND) {
pthread_setcancelstate(cur_state, NULL);
return ret;
} else if (ret == NSS_STATUS_UNAVAIL) {
/*
* If the server is down and the entry exists in the cache
* and belongs to this map return success and use the entry.
*/
struct mapent *exists = cache_lookup(mc, key);
if (exists && exists->source == source) {
pthread_setcancelstate(cur_state, NULL);
return NSS_STATUS_SUCCESS;
}
pthread_setcancelstate(cur_state, NULL);
warn(ap->logopt,
MODPREFIX "lookup for %s failed: connection failed", key);
return ret;
}
pthread_setcancelstate(cur_state, NULL);
/*
* Check for map change and update as needed for
* following cache lookup.
*/
cache_readlock(mc);
t_last_read = ap->exp_runfreq + 1;
me = cache_lookup_first(mc);
while (me) {
if (me->source == source) {
t_last_read = now - me->age;
break;
}
me = cache_lookup_next(mc, me);
}
cache_unlock(mc);
if (t_last_read > ap->exp_runfreq && ret & CHE_UPDATED)
source->stale = 1;
cache_readlock(mc);
me = cache_lookup_distinct(mc, "*");
if (ret == CHE_MISSING && (!me || me->source != source)) {
cache_unlock(mc);
return NSS_STATUS_NOTFOUND;
}
cache_unlock(mc);
return NSS_STATUS_SUCCESS;
}
int lookup_mount(const char *root, const char *name, int name_len, void *context)
{
struct lookup_context *ctxt = (struct lookup_context *) context;
struct stat st;
char key[KEY_MAX_LEN + 1];
int key_len;
char mapent[MAPENT_MAX_LEN + 1];
struct mapent_cache *me;
time_t now = time(NULL);
time_t t_last_read;
int need_hup = 0;
int ret = 1;
if (stat(ctxt->mapname, &st)) {
crit(MODPREFIX "file map %s, could not stat", ctxt->mapname);
return 1;
}
if (ap.type == LKP_DIRECT)
key_len = snprintf(key, KEY_MAX_LEN, "%s/%s", root, name);
else
key_len = snprintf(key, KEY_MAX_LEN, "%s", name);
if (key_len > KEY_MAX_LEN)
return 1;
me = cache_lookup_first();
t_last_read = me ? now - me->age : ap.exp_runfreq + 1;
/* only if it has been modified */
if (st.st_mtime > ctxt->mtime) {
ret = lookup_one(root, key, key_len, ctxt);
if (!ret)
return 1;
debug("ret = %d", ret);
if (t_last_read > ap.exp_runfreq)
if (ret & (CHE_UPDATED | CHE_MISSING))
need_hup = 1;
if (ret == CHE_MISSING) {
int wild = CHE_MISSING;
/* Maybe update wild card map entry */
if (ap.type == LKP_INDIRECT) {
wild = lookup_wild(root, ctxt);
if (wild == CHE_MISSING)
cache_delete(root, "*", 0);
}
if (cache_delete(root, key, 0) &&
wild & (CHE_MISSING | CHE_FAIL))
rmdir_path(key);
}
}
me = cache_lookup(key);
if (me == NULL) {
/* path component, do submount */
me = cache_partial_match(key);
if (me)
sprintf(mapent, "-fstype=autofs file:%s", ctxt->mapname);
} else
sprintf(mapent, me->mapent);
if (me) {
debug(MODPREFIX "%s -> %s", key, mapent);
ret = ctxt->parse->parse_mount(root, name, name_len,
mapent, ctxt->parse->context);
}
/* Have parent update its map ? */
if (need_hup)
kill(getppid(), SIGHUP);
return ret;
}
