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/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
*
* Copyright (C) 2002-2011 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(struct yaffs_dev *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")));
BUG();
}
if(allocator->object_cache){
kmem_cache_destroy(allocator->object_cache);
allocator->object_cache = NULL;
} else {
T(YAFFS_TRACE_ALWAYS,
(TSTR("NULL object cache\n")));
BUG();
}
kfree(allocator);
} else {
T(YAFFS_TRACE_ALWAYS,
(TSTR("Deinitialising NULL allocator\n")));
BUG();
}
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(struct yaffs_dev *dev)
{
yaffs_Allocator *allocator;
unsigned mount_id = struct yaffs_devo_lc(dev)->mount_id;
T(YAFFS_TRACE_ALLOCATE,(TSTR("Initialising yaffs allocator\n")));
if(dev->allocator)
BUG();
else if(mount_id >= 10){
T(YAFFS_TRACE_ALWAYS,(TSTR("Bad mount_id %u\n"),mount_id));
} else {
allocator = kmalloc(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")));
BUG();
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")));
BUG();
}
allocator->object_cache =
kmem_cache_create(allocator->object_name,
sizeof(struct yaffs_obj),
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")));
BUG();
}
}
}
struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev)
{
yaffs_Allocator *allocator = dev->allocator;
if(!allocator || !allocator->tnode_cache){
BUG();
return NULL;
}
return kmem_cache_alloc(allocator->tnode_cache, GFP_NOFS);
}
void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn)
{
yaffs_Allocator *allocator = dev->allocator;
kmem_cache_free(allocator->tnode_cache,tn);
}
struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev)
{
yaffs_Allocator *allocator = dev->allocator;
if(!allocator){
BUG();
return NULL;
}
if(!allocator->object_cache){
BUG();
return NULL;
}
return kmem_cache_alloc(allocator->object_cache, GFP_NOFS);
}
void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj)
{
yaffs_Allocator *allocator = dev->allocator;
kmem_cache_free(allocator->object_cache,obj);
}
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