yaffs: More name changes

[yaffs2.git] / patches / yaffs_linux_allocator.c

diff --git a/patches/yaffs_linux_allocator.c b/patches/yaffs_linux_allocator.c
new file mode 100644 (file)
index 0000000..d0837f8
--- /dev/null
+++ b/patches/yaffs_linux_allocator.c
@@ -0,0 +1,202 @@
+/*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ *   for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
+/*
+ * Note: Tis code is currently unused. Being checked in in case it becomes useful.
+ */
+
+
+#include "yaffs_allocator.h"
+#include "yaffs_guts.h"
+#include "yaffs_trace.h"
+#include "yportenv.h"
+#include "yaffs_linux.h"
+/*
+ * Start out with the same allocator as yaffs direct.
+ * Todo: Change to Linux slab allocator.
+ */
+
+
+
+#define NAMELEN  20
+struct yaffs_AllocatorStruct {
+       char tnode_name[NAMELEN+1];
+       char object_name[NAMELEN+1];
+       struct kmem_cache *tnode_cache;
+       struct kmem_cache *object_cache;
+};
+
+typedef struct yaffs_AllocatorStruct yaffs_Allocator;
+
+int mount_id;
+
+void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev)
+{
+       yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
+
+       T(YAFFS_TRACE_ALLOCATE,(TSTR("Deinitialising yaffs allocator\n")));
+
+       if(allocator){
+               if(allocator->tnode_cache){
+                       kmem_cache_destroy(allocator->tnode_cache);
+                       allocator->tnode_cache = NULL;
+               } else {
+                       T(YAFFS_TRACE_ALWAYS,
+                               (TSTR("NULL tnode cache\n")));
+                       YBUG();
+               }
+
+               if(allocator->object_cache){
+                       kmem_cache_destroy(allocator->object_cache);
+                       allocator->object_cache = NULL;
+               } else {
+                       T(YAFFS_TRACE_ALWAYS,
+                               (TSTR("NULL object cache\n")));
+                       YBUG();
+               }
+
+               YFREE(allocator);
+
+       } else {
+               T(YAFFS_TRACE_ALWAYS,
+                       (TSTR("Deinitialising NULL allocator\n")));
+               YBUG();
+       }
+       dev->allocator = NULL;
+}
+
+
+static void fake_ctor0(void *data){data = data;}
+static void fake_ctor1(void *data){data = data;}
+static void fake_ctor2(void *data){data = data;}
+static void fake_ctor3(void *data){data = data;}
+static void fake_ctor4(void *data){data = data;}
+static void fake_ctor5(void *data){data = data;}
+static void fake_ctor6(void *data){data = data;}
+static void fake_ctor7(void *data){data = data;}
+static void fake_ctor8(void *data){data = data;}
+static void fake_ctor9(void *data){data = data;}
+
+static void (*fake_ctor_list[10]) (void *) = {
+       fake_ctor0,
+       fake_ctor1,
+       fake_ctor2,
+       fake_ctor3,
+       fake_ctor4,
+       fake_ctor5,
+       fake_ctor6,
+       fake_ctor7,
+       fake_ctor8,
+       fake_ctor9,
+};
+
+void yaffs_init_raw_tnodes_and_objs(yaffs_dev_t *dev)
+{
+       yaffs_Allocator *allocator;
+       unsigned mount_id = yaffs_dev_to_lc(dev)->mount_id;
+
+       T(YAFFS_TRACE_ALLOCATE,(TSTR("Initialising yaffs allocator\n")));
+
+       if(dev->allocator)
+               YBUG();
+       else if(mount_id >= 10){
+               T(YAFFS_TRACE_ALWAYS,(TSTR("Bad mount_id %u\n"),mount_id));
+       } else {
+                allocator = YMALLOC(sizeof(yaffs_Allocator));
+                memset(allocator,0,sizeof(yaffs_Allocator));
+                dev->allocator = allocator;
+
+               if(!dev->allocator){
+                       T(YAFFS_TRACE_ALWAYS,
+                               (TSTR("yaffs allocator creation failed\n")));
+                       YBUG();
+                       return;
+
+               }
+
+               sprintf(allocator->tnode_name,"yaffs_t_%u",mount_id);
+               sprintf(allocator->object_name,"yaffs_o_%u",mount_id);
+
+               allocator->tnode_cache =
+                       kmem_cache_create(allocator->tnode_name,
+                               dev->tnode_size,
+                               0, 0,
+                               fake_ctor_list[mount_id]);
+               if(allocator->tnode_cache)
+                       T(YAFFS_TRACE_ALLOCATE,
+                               (TSTR("tnode cache \"%s\" %p\n"),
+                               allocator->tnode_name,allocator->tnode_cache));
+               else {
+                       T(YAFFS_TRACE_ALWAYS,
+                               (TSTR("yaffs cache creation failed\n")));
+                       YBUG();
+               }
+
+
+               allocator->object_cache = 
+                       kmem_cache_create(allocator->object_name,
+                               sizeof(yaffs_obj_t),
+                               0, 0,
+                               fake_ctor_list[mount_id]);
+
+               if(allocator->object_cache)
+                       T(YAFFS_TRACE_ALLOCATE,
+                               (TSTR("object cache \"%s\" %p\n"),
+                               allocator->object_name,allocator->object_cache));
+
+               else {
+                       T(YAFFS_TRACE_ALWAYS,
+                               (TSTR("yaffs cache creation failed\n")));
+                       YBUG();
+               }
+       } 
+}
+
+
+yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev)
+{
+       yaffs_Allocator *allocator = dev->allocator;
+       if(!allocator || !allocator->tnode_cache){
+               YBUG();
+               return NULL;
+       }
+       return kmem_cache_alloc(allocator->tnode_cache, GFP_NOFS);
+}
+
+void yaffs_free_raw_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn)
+{
+       yaffs_Allocator *allocator = dev->allocator;
+       kmem_cache_free(allocator->tnode_cache,tn);
+}
+
+yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev)
+{
+       yaffs_Allocator *allocator = dev->allocator;
+       if(!allocator){
+               YBUG();
+               return NULL;
+       }
+       if(!allocator->object_cache){
+               YBUG();
+               return NULL;
+       }
+       return kmem_cache_alloc(allocator->object_cache, GFP_NOFS);
+}
+
+void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj)
+{
+       yaffs_Allocator *allocator = dev->allocator;
+       kmem_cache_free(allocator->object_cache,obj);
+}