Generalization of constraints on page allocation and implementation/use

[palacios.git] / linux_module / buddy.h

diff --git a/linux_module/buddy.h b/linux_module/buddy.h
index 54c24a7..163c5a8 100644 (file)
--- a/linux_module/buddy.h
+++ b/linux_module/buddy.h
@@ -48,6 +48,8 @@ struct buddy_mempool {
                                    */
 
     unsigned long num_free_blocks;
+    
+    void             *user_metadata; // whatever the user wants
 
     struct rb_node tree_node;
 };
@@ -71,30 +73,36 @@ buddy_init(unsigned long pool_order,
           unsigned int node_id);
 
 extern void 
-buddy_deinit(struct buddy_memzone * zone);
+buddy_deinit(struct buddy_memzone * zone,
+            int (*free_callback)(void *user_metadata));
 
 /* Add pool at given physical address */
 extern int 
 buddy_add_pool(struct buddy_memzone * zone, 
               unsigned long base_addr, 
-              unsigned long pool_order);
+              unsigned long pool_order,
+              void          *user_metadata);
                          
 
 /* Remove pool based at given physical address */
 extern int
 buddy_remove_pool(struct buddy_memzone * zone, 
                  unsigned long base_addr, 
-                 unsigned char force);
+                 unsigned char force,
+                 void          **user_metadata);
+
 
 
 /* Allocate pages, returns physical address */
 extern uintptr_t 
 buddy_alloc(struct buddy_memzone * zone,
-           unsigned long order);
+           unsigned long order,
+           int (*filter_func)(void *paddr, void *filter_state),
+           void *filter_state);
 
 
 /* Free a physical address */
-extern void
+extern int
 buddy_free(struct buddy_memzone * zone,
           uintptr_t  addr,
           unsigned long order);