Detect cache devices that would overflow ocf_cacheline_t
@@ -912,6 +912,7 @@ static int ocf_metadata_hash_init_variable_size(struct ocf_cache *cache,
struct ocf_cache_line_settings *settings =
(struct ocf_cache_line_settings *)&cache->metadata.settings;
ocf_flush_page_synch_t lock_page, unlock_page;
+ uint64_t device_lines;
OCF_DEBUG_TRACE(cache);
@@ -919,7 +920,16 @@ static int ocf_metadata_hash_init_variable_size(struct ocf_cache *cache,
ctrl = cache->metadata.iface_priv;
- ctrl->device_lines = device_size / cache_line_size;
+ device_lines = device_size / cache_line_size;
+ if (device_lines >= (ocf_cache_line_t)(-1)){
+ /* TODO: This is just a rough check. Most optimal one would be
+ * located in calculate_metadata_size. */
+ ocf_cache_log(cache, log_err, "Device exceeds maximum suported size "
+ "with this cache line size. Try bigger cache line size.");
+ return -OCF_ERR_INVAL_CACHE_DEV;
+ }
+
+ ctrl->device_lines = device_lines;
if (settings->size != cache_line_size)
/* Re-initialize settings with different cache line size */
