/*
* 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>
* published by the Free Software Foundation.
*/
-
-
#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_list_struct {
- yaffs_obj_t *objects;
- struct yaffs_obj_list_struct *next;
+struct yaffs_obj_list {
+ struct yaffs_obj_list *next;
+ struct yaffs_obj *objects;
};
-typedef struct yaffs_obj_list_struct yaffs_obj_list;
-
-
struct yaffs_allocator {
int n_tnodes_created;
- yaffs_tnode_t *free_tnodes;
+ struct yaffs_tnode *free_tnodes;
int n_free_tnodes;
- yaffs_tnodelist_t *alloc_tnode_list;
+ struct yaffs_tnode_list *alloc_tnode_list;
int n_obj_created;
- yaffs_obj_t *free_objs;
+ struct list_head free_objs;
int n_free_objects;
- yaffs_obj_list *allocated_obj_list;
+ struct yaffs_obj_list *allocated_obj_list;
};
-
-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;
- struct yaffs_allocator *allocator = (struct yaffs_allocator *)dev->allocator;
-
- yaffs_tnodelist_t *tmp;
-
- if(!allocator){
- YBUG();
+ if (!allocator) {
+ BUG();
return;
}
while (allocator->alloc_tnode_list) {
tmp = allocator->alloc_tnode_list->next;
- YFREE(allocator->alloc_tnode_list->tnodes);
- YFREE(allocator->alloc_tnode_list);
+ kfree(allocator->alloc_tnode_list->tnodes);
+ kfree(allocator->alloc_tnode_list);
allocator->alloc_tnode_list = tmp;
-
}
allocator->free_tnodes = NULL;
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)
{
struct yaffs_allocator *allocator = dev->allocator;
- if(allocator){
- allocator->alloc_tnode_list = NULL;
- allocator->free_tnodes = NULL;
- allocator->n_free_tnodes = 0;
- allocator->n_tnodes_created = 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)
{
- struct yaffs_allocator *allocator = (struct yaffs_allocator *)dev->allocator;
+ struct yaffs_allocator *allocator =
+ (struct yaffs_allocator *)dev->allocator;
int i;
- yaffs_tnode_t *new_tnodes;
+ struct yaffs_tnode *new_tnodes;
u8 *mem;
- yaffs_tnode_t *curr;
- yaffs_tnode_t *next;
- yaffs_tnodelist_t *tnl;
+ 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 = YMALLOC(n_tnodes * dev->tnode_size);
- mem = (u8 *)new_tnodes;
+ new_tnodes = kmalloc(n_tnodes * dev->tnode_size, GFP_NOFS);
+ mem = (u8 *) new_tnodes;
if (!new_tnodes) {
- T(YAFFS_TRACE_ERROR,
- (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
+ 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 = (struct yaffs_tnode *)&mem[(n_tnodes - 1) * dev->tnode_size];
curr->internal[0] = allocator->free_tnodes;
- allocator->free_tnodes = (yaffs_tnode_t *)mem;
+ allocator->free_tnodes = (struct yaffs_tnode *)mem;
allocator->n_free_tnodes += n_tnodes;
allocator->n_tnodes_created += n_tnodes;
* 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 = 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)
{
- struct yaffs_allocator *allocator = (struct 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;
}
}
/* 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)
{
struct yaffs_allocator *allocator = dev->allocator;
- if(!allocator){
- YBUG();
+ if (!allocator) {
+ BUG();
return;
}
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)
{
struct yaffs_allocator *allocator = dev->allocator;
- if(allocator) {
- allocator->allocated_obj_list = NULL;
- allocator->free_objs = NULL;
- allocator->n_free_objects = 0;
- } else
- YBUG();
+ if (!allocator) {
+ BUG();
+ return;
+ }
+
+ allocator->allocated_obj_list = NULL;
+ INIT_LIST_HEAD(&allocator->free_objs);
+ allocator->n_free_objects = 0;
}
-static void yaffs_deinit_raw_objs(yaffs_dev_t *dev)
+static void yaffs_deinit_raw_objs(struct yaffs_dev *dev)
{
struct yaffs_allocator *allocator = dev->allocator;
- yaffs_obj_list *tmp;
+ struct yaffs_obj_list *tmp;
- if(!allocator){
- YBUG();
+ if (!allocator) {
+ BUG();
return;
}
while (allocator->allocated_obj_list) {
tmp = allocator->allocated_obj_list->next;
- YFREE(allocator->allocated_obj_list->objects);
- YFREE(allocator->allocated_obj_list);
-
+ kfree(allocator->allocated_obj_list->objects);
+ kfree(allocator->allocated_obj_list);
allocator->allocated_obj_list = tmp;
}
- allocator->free_objs = NULL;
+ INIT_LIST_HEAD(&allocator->free_objs);
allocator->n_free_objects = 0;
allocator->n_obj_created = 0;
}
-
-static int yaffs_create_free_objs(yaffs_dev_t *dev, int n_obj)
+static int yaffs_create_free_objs(struct yaffs_dev *dev, int n_obj)
{
struct yaffs_allocator *allocator = dev->allocator;
-
int i;
- yaffs_obj_t *new_objs;
- yaffs_obj_list *list;
+ struct yaffs_obj *new_objs;
+ struct yaffs_obj_list *list;
- if(!allocator){
- YBUG();
+ if (!allocator) {
+ BUG();
return YAFFS_FAIL;
}
return YAFFS_OK;
/* make these things */
- new_objs = YMALLOC(n_obj * sizeof(yaffs_obj_t));
- list = YMALLOC(sizeof(yaffs_obj_list));
+ new_objs = kmalloc(n_obj * sizeof(struct yaffs_obj), GFP_NOFS);
+ list = kmalloc(sizeof(struct yaffs_obj_list), GFP_NOFS);
if (!new_objs || !list) {
- if (new_objs){
- YFREE(new_objs);
- new_objs = NULL;
- }
- if (list){
- YFREE(list);
- list = NULL;
- }
- T(YAFFS_TRACE_ALLOCATE,
- (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
+ 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++) {
- new_objs[i].siblings.next =
- (struct ylist_head *)(&new_objs[i + 1]);
- }
+ for (i = 0; i < n_obj; i++)
+ list_add(&new_objs[i].siblings, &allocator->free_objs);
- new_objs[n_obj - 1].siblings.next = (void *)allocator->free_objs;
- allocator->free_objs = new_objs;
allocator->n_free_objects += n_obj;
allocator->n_obj_created += n_obj;
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;
+ 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->free_objs)
+ if (list_empty(&allocator->free_objs))
yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS);
- if (allocator->free_objs) {
- obj = allocator->free_objs;
- allocator->free_objs =
- (yaffs_obj_t *) (allocator->free_objs->siblings.next);
+ 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)
{
struct yaffs_allocator *allocator = dev->allocator;
- if(!allocator)
- YBUG();
- else {
- /* Link into the free list. */
- obj->siblings.next = (struct ylist_head *)(allocator->free_objs);
- allocator->free_objs = obj;
- allocator->n_free_objects++;
+ 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(yaffs_dev_t *dev)
+void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev)
{
- if(dev->allocator){
- yaffs_deinit_raw_tnodes(dev);
- yaffs_deinit_raw_objs(dev);
-
- YFREE(dev->allocator);
- dev->allocator=NULL;
- } else
- YBUG();
+
+ 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(yaffs_dev_t *dev)
+void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev)
{
struct yaffs_allocator *allocator;
- if(!dev->allocator){
- allocator = YMALLOC(sizeof(struct yaffs_allocator));
- if(allocator){
- dev->allocator = allocator;
- yaffs_init_raw_tnodes(dev);
- yaffs_init_raw_objs(dev);
- }
- } else
- YBUG();
-}
+ 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);
+ }
+}
-#endif
projects / yaffs2.git / blobdiff