1 files changed, 22 insertions, 52 deletions

diff --git a/include/linux/zpool.h b/include/linux/zpool.h
index 51bf43076165..369ef068fad8 100644
--- a/include/linux/zpool.h
+++ b/include/linux/zpool.h
@@ -4,9 +4,8 @@
  *
  * Copyright (C) 2014 Dan Streetman
  *
- * This is a common frontend for the zbud and zsmalloc memory
- * storage pool implementations.  Typically, this is used to
- * store compressed memory.
+ * This is a common frontend for the zswap compressed memory storage
+ * implementations.
  */
 
 #ifndef _ZPOOL_H_
@@ -14,54 +13,29 @@
 
 struct zpool;
 
-struct zpool_ops {
-	int (*evict)(struct zpool *pool, unsigned long handle);
-};
-
-/*
- * Control how a handle is mapped.  It will be ignored if the
- * implementation does not support it.  Its use is optional.
- * Note that this does not refer to memory protection, it
- * refers to how the memory will be copied in/out if copying
- * is necessary during mapping; read-write is the safest as
- * it copies the existing memory in on map, and copies the
- * changed memory back out on unmap.  Write-only does not copy
- * in the memory and should only be used for initialization.
- * If in doubt, use ZPOOL_MM_DEFAULT which is read-write.
- */
-enum zpool_mapmode {
-	ZPOOL_MM_RW, /* normal read-write mapping */
-	ZPOOL_MM_RO, /* read-only (no copy-out at unmap time) */
-	ZPOOL_MM_WO, /* write-only (no copy-in at map time) */
-
-	ZPOOL_MM_DEFAULT = ZPOOL_MM_RW
-};
-
 bool zpool_has_pool(char *type);
 
-struct zpool *zpool_create_pool(const char *type, const char *name,
-			gfp_t gfp, const struct zpool_ops *ops);
+struct zpool *zpool_create_pool(const char *type, const char *name, gfp_t gfp);
 
 const char *zpool_get_type(struct zpool *pool);
 
 void zpool_destroy_pool(struct zpool *pool);
 
-bool zpool_malloc_support_movable(struct zpool *pool);
-
 int zpool_malloc(struct zpool *pool, size_t size, gfp_t gfp,
-			unsigned long *handle);
+		 unsigned long *handle, const int nid);
 
 void zpool_free(struct zpool *pool, unsigned long handle);
 
-int zpool_shrink(struct zpool *pool, unsigned int pages,
-			unsigned int *reclaimed);
+void *zpool_obj_read_begin(struct zpool *zpool, unsigned long handle,
+			   void *local_copy);
 
-void *zpool_map_handle(struct zpool *pool, unsigned long handle,
-			enum zpool_mapmode mm);
+void zpool_obj_read_end(struct zpool *zpool, unsigned long handle,
+			void *handle_mem);
 
-void zpool_unmap_handle(struct zpool *pool, unsigned long handle);
+void zpool_obj_write(struct zpool *zpool, unsigned long handle,
+		     void *handle_mem, size_t mem_len);
 
-u64 zpool_get_total_size(struct zpool *pool);
+u64 zpool_get_total_pages(struct zpool *pool);
 
 
 /**
@@ -72,7 +46,7 @@ u64 zpool_get_total_size(struct zpool *pool);
  * @destroy:	destroy a pool.
  * @malloc:	allocate mem from a pool.
  * @free:	free mem from a pool.
- * @shrink:	shrink the pool.
+ * @sleep_mapped: whether zpool driver can sleep during map.
  * @map:	map a handle.
  * @unmap:	unmap a handle.
  * @total_size:	get total size of a pool.
@@ -86,31 +60,27 @@ struct zpool_driver {
 	atomic_t refcount;
 	struct list_head list;
 
-	void *(*create)(const char *name,
-			gfp_t gfp,
-			const struct zpool_ops *ops,
-			struct zpool *zpool);
+	void *(*create)(const char *name, gfp_t gfp);
 	void (*destroy)(void *pool);
 
-	bool malloc_support_movable;
 	int (*malloc)(void *pool, size_t size, gfp_t gfp,
-				unsigned long *handle);
+		      unsigned long *handle, const int nid);
 	void (*free)(void *pool, unsigned long handle);
 
-	int (*shrink)(void *pool, unsigned int pages,
-				unsigned int *reclaimed);
-
-	void *(*map)(void *pool, unsigned long handle,
-				enum zpool_mapmode mm);
-	void (*unmap)(void *pool, unsigned long handle);
+	void *(*obj_read_begin)(void *pool, unsigned long handle,
+				void *local_copy);
+	void (*obj_read_end)(void *pool, unsigned long handle,
+			     void *handle_mem);
+	void (*obj_write)(void *pool, unsigned long handle,
+			  void *handle_mem, size_t mem_len);
 
-	u64 (*total_size)(void *pool);
+	u64 (*total_pages)(void *pool);
 };
 
 void zpool_register_driver(struct zpool_driver *driver);
 
 int zpool_unregister_driver(struct zpool_driver *driver);
 
-bool zpool_evictable(struct zpool *pool);
+bool zpool_can_sleep_mapped(struct zpool *pool);
 
 #endif