diff --git a/headers/os/drivers/fs_cache.h b/headers/os/drivers/fs_cache.h
index 5d1a2f7723..c55fce4afc 100644
--- a/headers/os/drivers/fs_cache.h
+++ b/headers/os/drivers/fs_cache.h
@@ -9,10 +9,30 @@
 #include <fs_interface.h>
 
 
+typedef void (*transaction_notification_hook)(int32);
+
 #ifdef __cplusplus
 extern "C" {
 #endif 
 
+/* transactions */
+extern int32 cache_transaction_start(void *_cache, transaction_notification_hook hook);
+extern status_t cache_transaction_sync(void *_cache, int32 id);
+extern status_t cache_transaction_end(void *_cache, int32 id);
+extern status_t cache_transaction_abort(void *_cache, int32 id);
+
+/* block cache */
+extern void block_cache_delete(void *_cache, bool allowWrites);
+extern void *block_cache_create(int fd, off_t numBlocks, size_t blockSize);
+extern status_t block_cache_sync(void *_cache);
+
+extern void *block_cache_get_writable_etc(void *_cache, off_t blockNumber, off_t base, off_t length, int32 transaction);
+extern void *block_cache_get_writable(void *_cache, off_t blockNumber, int32 transaction);
+extern void *block_cache_get_empty(void *_cache, off_t blockNumber, int32 transaction);
+extern const void *block_cache_get_etc(void *_cache, off_t blockNumber, off_t base, off_t length);
+extern const void *block_cache_get(void *_cache, off_t blockNumber);
+extern void block_cache_put(void *_cache, off_t blockNumber);
+
 /* file cache */
 extern void *file_cache_create(mount_id mountID, vnode_id vnodeID, off_t size, int fd);
 extern void file_cache_delete(void *_cacheRef);