410 lines
8.2 KiB
C
410 lines
8.2 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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#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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#ifdef CONFIG_YAFFS_YMALLOC_ALLOCATOR
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void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev)
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{
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dev = dev;
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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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dev = dev;
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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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return (yaffs_tnode_t *)YMALLOC(dev->tnode_size);
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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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dev = dev;
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YFREE(tn);
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}
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void yaffs_init_raw_objs(yaffs_dev_t *dev)
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{
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dev = dev;
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}
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void yaffs_deinit_raw_objs(yaffs_dev_t *dev)
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{
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dev = dev;
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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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dev = dev;
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return (yaffs_obj_t *) YMALLOC(sizeof(yaffs_obj_t));
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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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dev = dev;
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YFREE(obj);
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}
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#else
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struct yaffs_tnode_list {
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struct yaffs_tnode_list *next;
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yaffs_tnode_t *tnodes;
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};
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typedef struct yaffs_tnode_list yaffs_tnodelist_t;
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struct yaffs_obj_tList_struct {
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yaffs_obj_t *objects;
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struct yaffs_obj_tList_struct *next;
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};
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typedef struct yaffs_obj_tList_struct yaffs_obj_tList;
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struct yaffs_AllocatorStruct {
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int n_tnodesCreated;
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yaffs_tnode_t *freeTnodes;
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int nFreeTnodes;
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yaffs_tnodelist_t *allocatedTnodeList;
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int n_objCreated;
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yaffs_obj_t *freeObjects;
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int nFreeObjects;
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yaffs_obj_tList *allocatedObjectList;
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};
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typedef struct yaffs_AllocatorStruct yaffs_Allocator;
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static void yaffs_deinit_raw_tnodes(yaffs_dev_t *dev)
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{
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yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
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yaffs_tnodelist_t *tmp;
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if(!allocator){
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YBUG();
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return;
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}
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while (allocator->allocatedTnodeList) {
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tmp = allocator->allocatedTnodeList->next;
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YFREE(allocator->allocatedTnodeList->tnodes);
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YFREE(allocator->allocatedTnodeList);
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allocator->allocatedTnodeList = tmp;
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}
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allocator->freeTnodes = NULL;
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allocator->nFreeTnodes = 0;
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allocator->n_tnodesCreated = 0;
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}
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static void yaffs_init_raw_tnodes(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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allocator->allocatedTnodeList = NULL;
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allocator->freeTnodes = NULL;
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allocator->nFreeTnodes = 0;
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allocator->n_tnodesCreated = 0;
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} else
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YBUG();
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}
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static int yaffs_create_tnodes(yaffs_dev_t *dev, int n_tnodes)
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{
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yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
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int i;
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yaffs_tnode_t *newTnodes;
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__u8 *mem;
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yaffs_tnode_t *curr;
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yaffs_tnode_t *next;
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yaffs_tnodelist_t *tnl;
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if(!allocator){
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YBUG();
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return YAFFS_FAIL;
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}
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if (n_tnodes < 1)
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return YAFFS_OK;
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/* make these things */
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newTnodes = YMALLOC(n_tnodes * dev->tnode_size);
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mem = (__u8 *)newTnodes;
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if (!newTnodes) {
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T(YAFFS_TRACE_ERROR,
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(TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
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return YAFFS_FAIL;
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}
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/* New hookup for wide tnodes */
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for (i = 0; i < n_tnodes - 1; i++) {
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curr = (yaffs_tnode_t *) &mem[i * dev->tnode_size];
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next = (yaffs_tnode_t *) &mem[(i+1) * dev->tnode_size];
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curr->internal[0] = next;
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}
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curr = (yaffs_tnode_t *) &mem[(n_tnodes - 1) * dev->tnode_size];
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curr->internal[0] = allocator->freeTnodes;
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allocator->freeTnodes = (yaffs_tnode_t *)mem;
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allocator->nFreeTnodes += n_tnodes;
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allocator->n_tnodesCreated += n_tnodes;
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/* Now add this bunch of tnodes to a list for freeing up.
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* NB If we can't add this to the management list it isn't fatal
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* but it just means we can't free this bunch of tnodes later.
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*/
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tnl = YMALLOC(sizeof(yaffs_tnodelist_t));
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if (!tnl) {
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T(YAFFS_TRACE_ERROR,
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(TSTR
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("yaffs: Could not add tnodes to management list" TENDSTR)));
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return YAFFS_FAIL;
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} else {
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tnl->tnodes = newTnodes;
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tnl->next = allocator->allocatedTnodeList;
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allocator->allocatedTnodeList = tnl;
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}
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T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
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return YAFFS_OK;
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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 = (yaffs_Allocator *)dev->allocator;
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yaffs_tnode_t *tn = NULL;
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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 there are none left make more */
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if (!allocator->freeTnodes)
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yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES);
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if (allocator->freeTnodes) {
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tn = allocator->freeTnodes;
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allocator->freeTnodes = allocator->freeTnodes->internal[0];
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allocator->nFreeTnodes--;
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}
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return tn;
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}
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/* FreeTnode frees up a tnode and puts it back on the free list */
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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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if(!allocator){
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YBUG();
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return;
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}
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if (tn) {
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tn->internal[0] = allocator->freeTnodes;
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allocator->freeTnodes = tn;
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allocator->nFreeTnodes++;
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}
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dev->checkpoint_blocks_required = 0; /* force recalculation*/
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}
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static void yaffs_init_raw_objs(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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allocator->allocatedObjectList = NULL;
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allocator->freeObjects = NULL;
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allocator->nFreeObjects = 0;
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} else
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YBUG();
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}
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static void yaffs_deinit_raw_objs(yaffs_dev_t *dev)
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{
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yaffs_Allocator *allocator = dev->allocator;
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yaffs_obj_tList *tmp;
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if(!allocator){
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YBUG();
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return;
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}
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while (allocator->allocatedObjectList) {
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tmp = allocator->allocatedObjectList->next;
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YFREE(allocator->allocatedObjectList->objects);
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YFREE(allocator->allocatedObjectList);
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allocator->allocatedObjectList = tmp;
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}
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allocator->freeObjects = NULL;
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allocator->nFreeObjects = 0;
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allocator->n_objCreated = 0;
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}
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static int yaffs_create_free_objs(yaffs_dev_t *dev, int n_obj)
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{
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yaffs_Allocator *allocator = dev->allocator;
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int i;
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yaffs_obj_t *newObjects;
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yaffs_obj_tList *list;
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if(!allocator){
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YBUG();
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return YAFFS_FAIL;
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}
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if (n_obj < 1)
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return YAFFS_OK;
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/* make these things */
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newObjects = YMALLOC(n_obj * sizeof(yaffs_obj_t));
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list = YMALLOC(sizeof(yaffs_obj_tList));
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if (!newObjects || !list) {
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if (newObjects){
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YFREE(newObjects);
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newObjects = NULL;
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}
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if (list){
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YFREE(list);
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list = NULL;
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}
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T(YAFFS_TRACE_ALLOCATE,
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(TSTR("yaffs: Could not allocate more objects" TENDSTR)));
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return YAFFS_FAIL;
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}
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/* Hook them into the free list */
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for (i = 0; i < n_obj - 1; i++) {
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newObjects[i].siblings.next =
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(struct ylist_head *)(&newObjects[i + 1]);
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}
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newObjects[n_obj - 1].siblings.next = (void *)allocator->freeObjects;
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allocator->freeObjects = newObjects;
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allocator->nFreeObjects += n_obj;
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allocator->n_objCreated += n_obj;
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/* Now add this bunch of Objects to a list for freeing up. */
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list->objects = newObjects;
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list->next = allocator->allocatedObjectList;
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allocator->allocatedObjectList = list;
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return YAFFS_OK;
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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_obj_t *obj = NULL;
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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 obj;
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}
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/* If there are none left make more */
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if (!allocator->freeObjects)
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yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS);
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if (allocator->freeObjects) {
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obj = allocator->freeObjects;
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allocator->freeObjects =
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(yaffs_obj_t *) (allocator->freeObjects->siblings.next);
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allocator->nFreeObjects--;
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}
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return obj;
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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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if(!allocator)
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YBUG();
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else {
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/* Link into the free list. */
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obj->siblings.next = (struct ylist_head *)(allocator->freeObjects);
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allocator->freeObjects = obj;
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allocator->nFreeObjects++;
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}
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}
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void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev)
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{
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if(dev->allocator){
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yaffs_deinit_raw_tnodes(dev);
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yaffs_deinit_raw_objs(dev);
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YFREE(dev->allocator);
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dev->allocator=NULL;
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} else
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YBUG();
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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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if(!dev->allocator){
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allocator = YMALLOC(sizeof(yaffs_Allocator));
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if(allocator){
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dev->allocator = allocator;
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yaffs_init_raw_tnodes(dev);
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yaffs_init_raw_objs(dev);
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}
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} else
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YBUG();
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}
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#endif
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