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kernel: update yaffs code

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Use the latest version of the yaffs code. Fetched from the
yaffs2 git tree and it is based on the following commit:

  commit bc76682d93955cfb33051beb503ad9f8a5450578
  Merge: 3a8580e ffa781d
  Author: Charles Manning <cdhmanning@gmail.com>
  Date:   Thu Jul 11 17:46:25 2013 +1200

      Merge branch 'master' of ssh://www.aleph1.co.uk/home/aleph1/git/yaffs2

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 39084
This commit is contained in:
Gabor Juhos
2013-12-16 07:51:19 +00:00
parent 85755deaf6
commit 7e3644d3cf
108 changed files with 10427 additions and 16358 deletions
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472
target/linux/generic/files/fs/yaffs2/yaffs_allocator.c
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@@ -1,299 +1,253 @@
/*
* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
* Copyright (C) 2002-2010 Aleph One Ltd.
* 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
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
*/
#include "yaffs_allocator.h"
#include "yaffs_guts.h"
#include "yaffs_trace.h"
#include "yportenv.h"
#ifdef CONFIG_YAFFS_YMALLOC_ALLOCATOR
void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev)
{
dev = dev;
}
void yaffs_init_raw_tnodes_and_objs(yaffs_dev_t *dev)
{
dev = dev;
}
yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev)
{
return (yaffs_tnode_t *)YMALLOC(dev->tnode_size);
}
void yaffs_free_raw_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn)
{
dev = dev;
YFREE(tn);
}
void yaffs_init_raw_objs(yaffs_dev_t *dev)
{
dev = dev;
}
void yaffs_deinit_raw_objs(yaffs_dev_t *dev)
{
dev = dev;
}
yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev)
{
dev = dev;
return (yaffs_obj_t *) YMALLOC(sizeof(yaffs_obj_t));
}
void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj)
{
dev = dev;
YFREE(obj);
}
#else
/*
* Each entry in yaffs_tnode_list and yaffs_obj_list hold blocks
* of approx 100 objects that are themn allocated singly.
* This is basically a simplified slab allocator.
*
* We don't use the Linux slab allocator because slab does not allow
* us to dump all the objects in one hit when we do a umount and tear
* down all the tnodes and objects. slab requires that we first free
* the individual objects.
*
* Once yaffs has been mainlined I shall try to motivate for a change
* to slab to provide the extra features we need here.
*/
struct yaffs_tnode_list {
struct yaffs_tnode_list *next;
yaffs_tnode_t *tnodes;
struct yaffs_tnode *tnodes;
};
typedef struct yaffs_tnode_list yaffs_tnodelist_t;
struct yaffs_obj_tList_struct {
yaffs_obj_t *objects;
struct yaffs_obj_tList_struct *next;
struct yaffs_obj_list {
struct yaffs_obj_list *next;
struct yaffs_obj *objects;
};
typedef struct yaffs_obj_tList_struct yaffs_obj_tList;
struct yaffs_allocator {
int n_tnodes_created;
struct yaffs_tnode *free_tnodes;
int n_free_tnodes;
struct yaffs_tnode_list *alloc_tnode_list;
int n_obj_created;
struct list_head free_objs;
int n_free_objects;
struct yaffs_AllocatorStruct {
int n_tnodesCreated;
yaffs_tnode_t *freeTnodes;
int nFreeTnodes;
yaffs_tnodelist_t *allocatedTnodeList;
int n_objCreated;
yaffs_obj_t *freeObjects;
int nFreeObjects;
yaffs_obj_tList *allocatedObjectList;
struct yaffs_obj_list *allocated_obj_list;
};
typedef struct yaffs_AllocatorStruct yaffs_Allocator;
static void yaffs_deinit_raw_tnodes(yaffs_dev_t *dev)
static void yaffs_deinit_raw_tnodes(struct yaffs_dev *dev)
{
struct yaffs_allocator *allocator =
(struct yaffs_allocator *)dev->allocator;
struct yaffs_tnode_list *tmp;
yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
yaffs_tnodelist_t *tmp;
if(!allocator){
YBUG();
if (!allocator) {
BUG();
return;
}
while (allocator->allocatedTnodeList) {
tmp = allocator->allocatedTnodeList->next;
YFREE(allocator->allocatedTnodeList->tnodes);
YFREE(allocator->allocatedTnodeList);
allocator->allocatedTnodeList = tmp;
while (allocator->alloc_tnode_list) {
tmp = allocator->alloc_tnode_list->next;
kfree(allocator->alloc_tnode_list->tnodes);
kfree(allocator->alloc_tnode_list);
allocator->alloc_tnode_list = tmp;
}
allocator->freeTnodes = NULL;
allocator->nFreeTnodes = 0;
allocator->n_tnodesCreated = 0;
allocator->free_tnodes = NULL;
allocator->n_free_tnodes = 0;
allocator->n_tnodes_created = 0;
}
static void yaffs_init_raw_tnodes(yaffs_dev_t *dev)
static void yaffs_init_raw_tnodes(struct yaffs_dev *dev)
{
yaffs_Allocator *allocator = dev->allocator;
struct yaffs_allocator *allocator = dev->allocator;
if(allocator){
allocator->allocatedTnodeList = NULL;
allocator->freeTnodes = NULL;
allocator->nFreeTnodes = 0;
allocator->n_tnodesCreated = 0;
} else
YBUG();
if (!allocator) {
BUG();
return;
}
allocator->alloc_tnode_list = NULL;
allocator->free_tnodes = NULL;
allocator->n_free_tnodes = 0;
allocator->n_tnodes_created = 0;
}
static int yaffs_create_tnodes(yaffs_dev_t *dev, int n_tnodes)
static int yaffs_create_tnodes(struct yaffs_dev *dev, int n_tnodes)
{
yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
struct yaffs_allocator *allocator =
(struct yaffs_allocator *)dev->allocator;
int i;
yaffs_tnode_t *newTnodes;
__u8 *mem;
yaffs_tnode_t *curr;
yaffs_tnode_t *next;
yaffs_tnodelist_t *tnl;
struct yaffs_tnode *new_tnodes;
u8 *mem;
struct yaffs_tnode *curr;
struct yaffs_tnode *next;
struct yaffs_tnode_list *tnl;
if(!allocator){
YBUG();
if (!allocator) {
BUG();
return YAFFS_FAIL;
}
if (n_tnodes < 1)
return YAFFS_OK;
/* make these things */
new_tnodes = kmalloc(n_tnodes * dev->tnode_size, GFP_NOFS);
mem = (u8 *) new_tnodes;
newTnodes = YMALLOC(n_tnodes * dev->tnode_size);
mem = (__u8 *)newTnodes;
if (!newTnodes) {
T(YAFFS_TRACE_ERROR,
(TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
if (!new_tnodes) {
yaffs_trace(YAFFS_TRACE_ERROR,
"yaffs: Could not allocate Tnodes");
return YAFFS_FAIL;
}
/* New hookup for wide tnodes */
for (i = 0; i < n_tnodes - 1; i++) {
curr = (yaffs_tnode_t *) &mem[i * dev->tnode_size];
next = (yaffs_tnode_t *) &mem[(i+1) * dev->tnode_size];
curr = (struct yaffs_tnode *)&mem[i * dev->tnode_size];
next = (struct yaffs_tnode *)&mem[(i + 1) * dev->tnode_size];
curr->internal[0] = next;
}
curr = (yaffs_tnode_t *) &mem[(n_tnodes - 1) * dev->tnode_size];
curr->internal[0] = allocator->freeTnodes;
allocator->freeTnodes = (yaffs_tnode_t *)mem;
curr = (struct yaffs_tnode *)&mem[(n_tnodes - 1) * dev->tnode_size];
curr->internal[0] = allocator->free_tnodes;
allocator->free_tnodes = (struct yaffs_tnode *)mem;
allocator->nFreeTnodes += n_tnodes;
allocator->n_tnodesCreated += n_tnodes;
allocator->n_free_tnodes += n_tnodes;
allocator->n_tnodes_created += n_tnodes;
/* Now add this bunch of tnodes to a list for freeing up.
* NB If we can't add this to the management list it isn't fatal
* but it just means we can't free this bunch of tnodes later.
*/
tnl = YMALLOC(sizeof(yaffs_tnodelist_t));
tnl = kmalloc(sizeof(struct yaffs_tnode_list), GFP_NOFS);
if (!tnl) {
T(YAFFS_TRACE_ERROR,
(TSTR
("yaffs: Could not add tnodes to management list" TENDSTR)));
return YAFFS_FAIL;
yaffs_trace(YAFFS_TRACE_ERROR,
"Could not add tnodes to management list");
return YAFFS_FAIL;
} else {
tnl->tnodes = newTnodes;
tnl->next = allocator->allocatedTnodeList;
allocator->allocatedTnodeList = tnl;
tnl->tnodes = new_tnodes;
tnl->next = allocator->alloc_tnode_list;
allocator->alloc_tnode_list = tnl;
}
T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
yaffs_trace(YAFFS_TRACE_ALLOCATE, "Tnodes added");
return YAFFS_OK;
}
yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev)
struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev)
{
yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
yaffs_tnode_t *tn = NULL;
struct yaffs_allocator *allocator =
(struct yaffs_allocator *)dev->allocator;
struct yaffs_tnode *tn = NULL;
if(!allocator){
YBUG();
if (!allocator) {
BUG();
return NULL;
}
/* If there are none left make more */
if (!allocator->freeTnodes)
if (!allocator->free_tnodes)
yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES);
if (allocator->freeTnodes) {
tn = allocator->freeTnodes;
allocator->freeTnodes = allocator->freeTnodes->internal[0];
allocator->nFreeTnodes--;
if (allocator->free_tnodes) {
tn = allocator->free_tnodes;
allocator->free_tnodes = allocator->free_tnodes->internal[0];
allocator->n_free_tnodes--;
}
return tn;
}
/* FreeTnode frees up a tnode and puts it back on the free list */
void yaffs_free_raw_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn)
void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn)
{
yaffs_Allocator *allocator = dev->allocator;
struct yaffs_allocator *allocator = dev->allocator;
if(!allocator){
YBUG();
if (!allocator) {
BUG();
return;
}
if (tn) {
tn->internal[0] = allocator->freeTnodes;
allocator->freeTnodes = tn;
allocator->nFreeTnodes++;
tn->internal[0] = allocator->free_tnodes;
allocator->free_tnodes = tn;
allocator->n_free_tnodes++;
}
dev->checkpoint_blocks_required = 0; /* force recalculation*/
dev->checkpoint_blocks_required = 0; /* force recalculation */
}
/*--------------- yaffs_obj alloaction ------------------------
*
* Free yaffs_objs are stored in a list using obj->siblings.
* The blocks of allocated objects are stored in a linked list.
*/
static void yaffs_init_raw_objs(yaffs_dev_t *dev)
static void yaffs_init_raw_objs(struct yaffs_dev *dev)
{
yaffs_Allocator *allocator = dev->allocator;
struct yaffs_allocator *allocator = dev->allocator;
if(allocator) {
allocator->allocatedObjectList = NULL;
allocator->freeObjects = NULL;
allocator->nFreeObjects = 0;
} else
YBUG();
}
static void yaffs_deinit_raw_objs(yaffs_dev_t *dev)
{
yaffs_Allocator *allocator = dev->allocator;
yaffs_obj_tList *tmp;
if(!allocator){
YBUG();
if (!allocator) {
BUG();
return;
}
while (allocator->allocatedObjectList) {
tmp = allocator->allocatedObjectList->next;
YFREE(allocator->allocatedObjectList->objects);
YFREE(allocator->allocatedObjectList);
allocator->allocatedObjectList = tmp;
}
allocator->freeObjects = NULL;
allocator->nFreeObjects = 0;
allocator->n_objCreated = 0;
allocator->allocated_obj_list = NULL;
INIT_LIST_HEAD(&allocator->free_objs);
allocator->n_free_objects = 0;
}
static int yaffs_create_free_objs(yaffs_dev_t *dev, int n_obj)
static void yaffs_deinit_raw_objs(struct yaffs_dev *dev)
{
yaffs_Allocator *allocator = dev->allocator;
struct yaffs_allocator *allocator = dev->allocator;
struct yaffs_obj_list *tmp;
if (!allocator) {
BUG();
return;
}
while (allocator->allocated_obj_list) {
tmp = allocator->allocated_obj_list->next;
kfree(allocator->allocated_obj_list->objects);
kfree(allocator->allocated_obj_list);
allocator->allocated_obj_list = tmp;
}
INIT_LIST_HEAD(&allocator->free_objs);
allocator->n_free_objects = 0;
allocator->n_obj_created = 0;
}
static int yaffs_create_free_objs(struct yaffs_dev *dev, int n_obj)
{
struct yaffs_allocator *allocator = dev->allocator;
int i;
yaffs_obj_t *newObjects;
yaffs_obj_tList *list;
struct yaffs_obj *new_objs;
struct yaffs_obj_list *list;
if(!allocator){
YBUG();
if (!allocator) {
BUG();
return YAFFS_FAIL;
}
@@ -301,109 +255,103 @@ static int yaffs_create_free_objs(yaffs_dev_t *dev, int n_obj)
return YAFFS_OK;
/* make these things */
newObjects = YMALLOC(n_obj * sizeof(yaffs_obj_t));
list = YMALLOC(sizeof(yaffs_obj_tList));
new_objs = kmalloc(n_obj * sizeof(struct yaffs_obj), GFP_NOFS);
list = kmalloc(sizeof(struct yaffs_obj_list), GFP_NOFS);
if (!newObjects || !list) {
if (newObjects){
YFREE(newObjects);
newObjects = NULL;
}
if (list){
YFREE(list);
list = NULL;
}
T(YAFFS_TRACE_ALLOCATE,
(TSTR("yaffs: Could not allocate more objects" TENDSTR)));
if (!new_objs || !list) {
kfree(new_objs);
new_objs = NULL;
kfree(list);
list = NULL;
yaffs_trace(YAFFS_TRACE_ALLOCATE,
"Could not allocate more objects");
return YAFFS_FAIL;
}
/* Hook them into the free list */
for (i = 0; i < n_obj - 1; i++) {
newObjects[i].siblings.next =
(struct ylist_head *)(&newObjects[i + 1]);
}
for (i = 0; i < n_obj; i++)
list_add(&new_objs[i].siblings, &allocator->free_objs);
newObjects[n_obj - 1].siblings.next = (void *)allocator->freeObjects;
allocator->freeObjects = newObjects;
allocator->nFreeObjects += n_obj;
allocator->n_objCreated += n_obj;
allocator->n_free_objects += n_obj;
allocator->n_obj_created += n_obj;
/* Now add this bunch of Objects to a list for freeing up. */
list->objects = newObjects;
list->next = allocator->allocatedObjectList;
allocator->allocatedObjectList = list;
list->objects = new_objs;
list->next = allocator->allocated_obj_list;
allocator->allocated_obj_list = list;
return YAFFS_OK;
}
yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev)
struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev)
{
yaffs_obj_t *obj = NULL;
yaffs_Allocator *allocator = dev->allocator;
struct yaffs_obj *obj = NULL;
struct list_head *lh;
struct yaffs_allocator *allocator = dev->allocator;
if(!allocator) {
YBUG();
if (!allocator) {
BUG();
return obj;
}
/* If there are none left make more */
if (!allocator->freeObjects)
if (list_empty(&allocator->free_objs))
yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS);
if (allocator->freeObjects) {
obj = allocator->freeObjects;
allocator->freeObjects =
(yaffs_obj_t *) (allocator->freeObjects->siblings.next);
allocator->nFreeObjects--;
if (!list_empty(&allocator->free_objs)) {
lh = allocator->free_objs.next;
obj = list_entry(lh, struct yaffs_obj, siblings);
list_del_init(lh);
allocator->n_free_objects--;
}
return obj;
}
void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj)
void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj)
{
yaffs_Allocator *allocator = dev->allocator;
struct yaffs_allocator *allocator = dev->allocator;
if(!allocator)
YBUG();
else {
/* Link into the free list. */
obj->siblings.next = (struct ylist_head *)(allocator->freeObjects);
allocator->freeObjects = obj;
allocator->nFreeObjects++;
if (!allocator) {
BUG();
return;
}
/* Link into the free list. */
list_add(&obj->siblings, &allocator->free_objs);
allocator->n_free_objects++;
}
void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev)
{
if (!dev->allocator) {
BUG();
return;
}
yaffs_deinit_raw_tnodes(dev);
yaffs_deinit_raw_objs(dev);
kfree(dev->allocator);
dev->allocator = NULL;
}
void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev)
{
struct yaffs_allocator *allocator;
if (dev->allocator) {
BUG();
return;
}
allocator = kmalloc(sizeof(struct yaffs_allocator), GFP_NOFS);
if (allocator) {
dev->allocator = allocator;
yaffs_init_raw_tnodes(dev);
yaffs_init_raw_objs(dev);
}
}
void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev)
{
if(dev->allocator){
yaffs_deinit_raw_tnodes(dev);
yaffs_deinit_raw_objs(dev);
YFREE(dev->allocator);
dev->allocator=NULL;
} else
YBUG();
}
void yaffs_init_raw_tnodes_and_objs(yaffs_dev_t *dev)
{
yaffs_Allocator *allocator;
if(!dev->allocator){
allocator = YMALLOC(sizeof(yaffs_Allocator));
if(allocator){
dev->allocator = allocator;
yaffs_init_raw_tnodes(dev);
yaffs_init_raw_objs(dev);
}
} else
YBUG();
}
#endif