/**
* Clears the filter from the internal data stores. This can only
* be performed if the filter is proxied.
* @arg filter_name The name of the filter to delete
* @return 0 on success, -1 if the filter does not exist, -2
* if the filter is not proxied.
*/
int filtmgr_clear_filter(bloom_filtmgr *mgr, char *filter_name) {
int res = 0;
pthread_mutex_lock(&mgr->write_lock);
// Get the filter
bloom_filter_wrapper *filt = take_filter(mgr, filter_name);
if (!filt) {
res = -1;
goto LEAVE;
}
// Check if the filter is proxied
if (!bloomf_is_proxied(filt->filter)) {
res = -2;
goto LEAVE;
}
// This is critical, as it prevents it from
// being deleted. Instead, it is merely closed.
filt->is_active = 0;
filt->should_delete = 0;
create_delta_update(mgr, DELETE, filt);
LEAVE:
pthread_mutex_unlock(&mgr->write_lock);
return res;
}
/**
* Called as part of the hashmap callback
* to list cold filters. Only works if value is
* not NULL.
*/
static int filter_map_list_cold_cb(void *data, const unsigned char *key, uint32_t key_len, void *value) {
(void)key_len;
// Cast the inputs
bloom_filter_list_head *head = data;
bloom_filter_wrapper *filt = value;
// Check if hot, turn off and skip
if (filt->is_hot) {
filt->is_hot = 0;
return 0;
}
// Check if proxied
if (bloomf_is_proxied(filt->filter)) {
return 0;
}
// Allocate a new entry
bloom_filter_list *node = malloc(sizeof(bloom_filter_list));
// Setup
node->filter_name = strdup((char*)key);
node->next = head->head;
// Inject
head->head = node;
head->size++;
return 0;
}
// Callback invoked by list command to create an output
// line for each filter. We hold a filter handle which we
// can use to get some info about it
static void info_filter_cb(void *data, char *filter_name, bloom_filter *filter) {
(void)filter_name;
// Cast the intput
char **out = data;
// Get some metrics
filter_counters *counters = bloomf_counters(filter);
uint64_t capacity = bloomf_capacity(filter);
uint64_t storage = bloomf_byte_size(filter);
uint64_t size = bloomf_size(filter);
uint64_t checks = counters->check_hits + counters->check_misses;
uint64_t sets = counters->set_hits + counters->set_misses;
// Generate a formatted string output
int res;
res = asprintf(out, "capacity %llu\n\
checks %llu\n\
check_hits %llu\n\
check_misses %llu\n\
in_memory %d\n\
page_ins %llu\n\
page_outs %llu\n\
probability %f\n\
sets %llu\n\
set_hits %llu\n\
set_misses %llu\n\
size %llu\n\
storage %llu\n",
(unsigned long long)capacity, (unsigned long long)checks,
(unsigned long long)counters->check_hits, (unsigned long long)counters->check_misses,
((bloomf_is_proxied(filter)) ? 0 : 1),
(unsigned long long)counters->page_ins, (unsigned long long)counters->page_outs,
filter->filter_config.default_probability,
(unsigned long long)sets, (unsigned long long)counters->set_hits,
(unsigned long long)counters->set_misses, (unsigned long long)size, (unsigned long long)storage);
assert(res != -1);
}