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Signed-off-by: Gabor Juhos <juhosg@openwrt.org> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34013 3c298f89-4303-0410-b956-a3cf2f4a3e73
201 lines
4.7 KiB
C
201 lines
4.7 KiB
C
/*
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* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2010 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 2.1 as
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* published by the Free Software Foundation.
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*
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* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
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*
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* Note: Tis code is currently unused. Being checked in in case it becomes useful.
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*/
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#include "yaffs_allocator.h"
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#include "yaffs_guts.h"
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#include "yaffs_trace.h"
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#include "yportenv.h"
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#include "yaffs_linux.h"
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/*
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* Start out with the same allocator as yaffs direct.
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* Todo: Change to Linux slab allocator.
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*/
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#define NAMELEN 20
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struct yaffs_AllocatorStruct {
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char tnode_name[NAMELEN+1];
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char object_name[NAMELEN+1];
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struct kmem_cache *tnode_cache;
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struct kmem_cache *object_cache;
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};
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typedef struct yaffs_AllocatorStruct yaffs_Allocator;
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int mount_id;
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void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev)
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{
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yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
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T(YAFFS_TRACE_ALLOCATE,(TSTR("Deinitialising yaffs allocator\n")));
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if(allocator){
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if(allocator->tnode_cache){
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kmem_cache_destroy(allocator->tnode_cache);
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allocator->tnode_cache = NULL;
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} else {
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T(YAFFS_TRACE_ALWAYS,
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(TSTR("NULL tnode cache\n")));
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YBUG();
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}
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if(allocator->object_cache){
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kmem_cache_destroy(allocator->object_cache);
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allocator->object_cache = NULL;
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} else {
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T(YAFFS_TRACE_ALWAYS,
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(TSTR("NULL object cache\n")));
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YBUG();
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}
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YFREE(allocator);
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} else {
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T(YAFFS_TRACE_ALWAYS,
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(TSTR("Deinitialising NULL allocator\n")));
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YBUG();
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}
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dev->allocator = NULL;
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}
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static void fake_ctor0(void *data){data = data;}
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static void fake_ctor1(void *data){data = data;}
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static void fake_ctor2(void *data){data = data;}
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static void fake_ctor3(void *data){data = data;}
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static void fake_ctor4(void *data){data = data;}
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static void fake_ctor5(void *data){data = data;}
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static void fake_ctor6(void *data){data = data;}
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static void fake_ctor7(void *data){data = data;}
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static void fake_ctor8(void *data){data = data;}
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static void fake_ctor9(void *data){data = data;}
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static void (*fake_ctor_list[10]) (void *) = {
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fake_ctor0,
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fake_ctor1,
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fake_ctor2,
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fake_ctor3,
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fake_ctor4,
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fake_ctor5,
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fake_ctor6,
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fake_ctor7,
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fake_ctor8,
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fake_ctor9,
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};
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void yaffs_init_raw_tnodes_and_objs(yaffs_dev_t *dev)
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{
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yaffs_Allocator *allocator;
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unsigned mount_id = yaffs_dev_to_lc(dev)->mount_id;
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T(YAFFS_TRACE_ALLOCATE,(TSTR("Initialising yaffs allocator\n")));
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if(dev->allocator)
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YBUG();
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else if(mount_id >= 10){
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T(YAFFS_TRACE_ALWAYS,(TSTR("Bad mount_id %u\n"),mount_id));
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} else {
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allocator = YMALLOC(sizeof(yaffs_Allocator));
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memset(allocator,0,sizeof(yaffs_Allocator));
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dev->allocator = allocator;
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if(!dev->allocator){
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T(YAFFS_TRACE_ALWAYS,
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(TSTR("yaffs allocator creation failed\n")));
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YBUG();
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return;
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}
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sprintf(allocator->tnode_name,"yaffs_t_%u",mount_id);
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sprintf(allocator->object_name,"yaffs_o_%u",mount_id);
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allocator->tnode_cache =
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kmem_cache_create(allocator->tnode_name,
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dev->tnode_size,
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0, 0,
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fake_ctor_list[mount_id]);
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if(allocator->tnode_cache)
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T(YAFFS_TRACE_ALLOCATE,
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(TSTR("tnode cache \"%s\" %p\n"),
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allocator->tnode_name,allocator->tnode_cache));
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else {
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T(YAFFS_TRACE_ALWAYS,
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(TSTR("yaffs cache creation failed\n")));
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YBUG();
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}
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allocator->object_cache =
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kmem_cache_create(allocator->object_name,
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sizeof(yaffs_obj_t),
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0, 0,
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fake_ctor_list[mount_id]);
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if(allocator->object_cache)
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T(YAFFS_TRACE_ALLOCATE,
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(TSTR("object cache \"%s\" %p\n"),
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allocator->object_name,allocator->object_cache));
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else {
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T(YAFFS_TRACE_ALWAYS,
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(TSTR("yaffs cache creation failed\n")));
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YBUG();
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}
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}
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}
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yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev)
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{
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yaffs_Allocator *allocator = dev->allocator;
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if(!allocator || !allocator->tnode_cache){
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YBUG();
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return NULL;
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}
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return kmem_cache_alloc(allocator->tnode_cache, GFP_NOFS);
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}
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void yaffs_free_raw_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn)
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{
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yaffs_Allocator *allocator = dev->allocator;
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kmem_cache_free(allocator->tnode_cache,tn);
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}
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yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev)
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{
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yaffs_Allocator *allocator = dev->allocator;
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if(!allocator){
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YBUG();
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return NULL;
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}
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if(!allocator->object_cache){
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YBUG();
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return NULL;
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}
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return kmem_cache_alloc(allocator->object_cache, GFP_NOFS);
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}
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void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj)
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{
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yaffs_Allocator *allocator = dev->allocator;
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kmem_cache_free(allocator->object_cache,obj);
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}
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