static void
test_rend_cache_increment_allocation(void *data)
{
(void)data;
// Test when the cache is not overflowing
rend_cache_total_allocation = 5;
rend_cache_increment_allocation(3);
tt_int_op(rend_cache_total_allocation, OP_EQ, 8);
// Test when there are too many allocations
rend_cache_total_allocation = SIZE_MAX-1;
setup_full_capture_of_logs(LOG_WARN);
rend_cache_increment_allocation(2);
tt_u64_op(rend_cache_total_allocation, OP_EQ, SIZE_MAX);
expect_single_log_msg_containing(
"Overflow in rend_cache_increment_allocation");
teardown_capture_of_logs();
// And again
rend_cache_increment_allocation(2);
tt_u64_op(rend_cache_total_allocation, OP_EQ, SIZE_MAX);
done:
teardown_capture_of_logs();
}
static void
test_rend_cache_increment_allocation(void *data)
{
(void)data;
// Test when the cache is not overflowing
rend_cache_total_allocation = 5;
rend_cache_increment_allocation(3);
tt_int_op(rend_cache_total_allocation, OP_EQ, 8);
// Test when there are too many allocations
rend_cache_total_allocation = SIZE_MAX-1;
rend_cache_increment_allocation(2);
tt_u64_op(rend_cache_total_allocation, OP_EQ, SIZE_MAX);
// And again
rend_cache_increment_allocation(2);
tt_u64_op(rend_cache_total_allocation, OP_EQ, SIZE_MAX);
done:
(void)0;
}
/* Try to store a valid version 3 descriptor in the directory cache. Return 0
* on success else a negative value is returned indicating that we have a
* newer version in our cache. On error, caller is responsible to free the
* given descriptor desc. */
static int
cache_store_v3_as_dir(hs_cache_dir_descriptor_t *desc)
{
hs_cache_dir_descriptor_t *cache_entry;
tor_assert(desc);
/* Verify if we have an entry in the cache for that key and if yes, check
* if we should replace it? */
cache_entry = lookup_v3_desc_as_dir(desc->key);
if (cache_entry != NULL) {
/* Only replace descriptor if revision-counter is greater than the one
* in our cache */
if (cache_entry->plaintext_data->revision_counter >=
desc->plaintext_data->revision_counter) {
log_info(LD_REND, "Descriptor revision counter in our cache is "
"greater or equal than the one we received (%d/%d). "
"Rejecting!",
(int)cache_entry->plaintext_data->revision_counter,
(int)desc->plaintext_data->revision_counter);
goto err;
}
/* We now know that the descriptor we just received is a new one so
* remove the entry we currently have from our cache so we can then
* store the new one. */
remove_v3_desc_as_dir(cache_entry);
rend_cache_decrement_allocation(cache_get_dir_entry_size(cache_entry));
cache_dir_desc_free(cache_entry);
}
/* Store the descriptor we just got. We are sure here that either we
* don't have the entry or we have a newer descriptor and the old one
* has been removed from the cache. */
store_v3_desc_as_dir(desc);
/* Update our total cache size with this entry for the OOM. This uses the
* old HS protocol cache subsystem for which we are tied with. */
rend_cache_increment_allocation(cache_get_dir_entry_size(desc));
/* XXX: Update HS statistics. We should have specific stats for v3. */
return 0;
err:
return -1;
}
