/*
- * 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_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev)
-{
- dev = dev;
-}
-
-void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev)
-{
- dev = dev;
-}
-
-yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev)
-{
- return (yaffs_Tnode *)YMALLOC(dev->tnodeSize);
-}
-
-void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn)
-{
- dev = dev;
- YFREE(tn);
-}
-
-void yaffs_InitialiseRawObjects(yaffs_Device *dev)
-{
- dev = dev;
-}
-
-void yaffs_DeinitialiseRawObjects(yaffs_Device *dev)
-{
- dev = dev;
-}
-
-yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev)
-{
- dev = dev;
- return (yaffs_Object *) YMALLOC(sizeof(yaffs_Object));
-}
-
-
-void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *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_TnodeList_struct {
- struct yaffs_TnodeList_struct *next;
- yaffs_Tnode *tnodes;
+struct yaffs_tnode_list {
+ struct yaffs_tnode_list *next;
+ struct yaffs_tnode *tnodes;
};
-typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
-
-struct yaffs_ObjectList_struct {
- yaffs_Object *objects;
- struct yaffs_ObjectList_struct *next;
+struct yaffs_obj_list {
+ struct yaffs_obj_list *next;
+ struct yaffs_obj *objects;
};
-typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
-
+struct yaffs_allocator {
+ int n_tnodes_created;
+ struct yaffs_tnode *free_tnodes;
+ int n_free_tnodes;
+ struct yaffs_tnode_list *alloc_tnode_list;
-struct yaffs_AllocatorStruct {
- int nTnodesCreated;
- yaffs_Tnode *freeTnodes;
- int nFreeTnodes;
- yaffs_TnodeList *allocatedTnodeList;
+ int n_obj_created;
+ struct list_head free_objs;
+ int n_free_objects;
- int nObjectsCreated;
- yaffs_Object *freeObjects;
- int nFreeObjects;
-
- yaffs_ObjectList *allocatedObjectList;
+ struct yaffs_obj_list *allocated_obj_list;
};
-typedef struct yaffs_AllocatorStruct yaffs_Allocator;
-
-
-static void yaffs_DeinitialiseRawTnodes(yaffs_Device *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 *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->nTnodesCreated = 0;
+ allocator->free_tnodes = NULL;
+ allocator->n_free_tnodes = 0;
+ allocator->n_tnodes_created = 0;
}
-static void yaffs_InitialiseRawTnodes(yaffs_Device *dev)
+static void yaffs_init_raw_tnodes(struct yaffs_dev *dev)
{
- yaffs_Allocator *allocator = dev->allocator;
-
- if(allocator){
- allocator->allocatedTnodeList = NULL;
- allocator->freeTnodes = NULL;
- allocator->nFreeTnodes = 0;
- allocator->nTnodesCreated = 0;
- } else
- YBUG();
+ struct yaffs_allocator *allocator = dev->allocator;
+
+ 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_CreateTnodes(yaffs_Device *dev, int nTnodes)
+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 *newTnodes;
- __u8 *mem;
- yaffs_Tnode *curr;
- yaffs_Tnode *next;
- yaffs_TnodeList *tnl;
-
- if(!allocator){
- YBUG();
+ struct yaffs_tnode *new_tnodes;
+ u8 *mem;
+ struct yaffs_tnode *curr;
+ struct yaffs_tnode *next;
+ struct yaffs_tnode_list *tnl;
+
+ if (!allocator) {
+ BUG();
return YAFFS_FAIL;
}
- if (nTnodes < 1)
+ 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(nTnodes * dev->tnodeSize);
- 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;
}
- /* Hook them into the free list */
-#if 0
- for (i = 0; i < nTnodes - 1; i++) {
- newTnodes[i].internal[0] = &newTnodes[i + 1];
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- }
-
- newTnodes[nTnodes - 1].internal[0] = allocator->freeTnodes;
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- allocator->freeTnodes = newTnodes;
-#else
/* New hookup for wide tnodes */
- for (i = 0; i < nTnodes - 1; i++) {
- curr = (yaffs_Tnode *) &mem[i * dev->tnodeSize];
- next = (yaffs_Tnode *) &mem[(i+1) * dev->tnodeSize];
+ for (i = 0; i < n_tnodes - 1; i++) {
+ 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 *) &mem[(nTnodes - 1) * dev->tnodeSize];
- curr->internal[0] = allocator->freeTnodes;
- allocator->freeTnodes = (yaffs_Tnode *)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;
-#endif
-
-
- allocator->nFreeTnodes += nTnodes;
- allocator->nTnodesCreated += nTnodes;
+ 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));
+ 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 *yaffs_AllocateRawTnode(yaffs_Device *dev)
+struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev)
{
- yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
- yaffs_Tnode *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)
- yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
-
- if (allocator->freeTnodes) {
- tn = allocator->freeTnodes;
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
- /* Hoosterman, this thing looks like it isn't in the list */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
- }
-#endif
- allocator->freeTnodes = allocator->freeTnodes->internal[0];
- allocator->nFreeTnodes--;
+ if (!allocator->free_tnodes)
+ yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES);
+
+ 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_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *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) {
-#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
- if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
- /* Hoosterman, this thing looks like it is already in the list */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
- }
- tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
-#endif
- 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->nCheckpointBlocksRequired = 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_InitialiseRawObjects(yaffs_Device *dev)
+static void yaffs_init_raw_objs(struct yaffs_dev *dev)
{
- yaffs_Allocator *allocator = dev->allocator;
-
- if(allocator) {
- allocator->allocatedObjectList = NULL;
- allocator->freeObjects = NULL;
- allocator->nFreeObjects = 0;
- } else
- YBUG();
+ struct yaffs_allocator *allocator = dev->allocator;
+
+ if (!allocator) {
+ BUG();
+ return;
+ }
+
+ allocator->allocated_obj_list = NULL;
+ INIT_LIST_HEAD(&allocator->free_objs);
+ allocator->n_free_objects = 0;
}
-static void yaffs_DeinitialiseRawObjects(yaffs_Device *dev)
+static void yaffs_deinit_raw_objs(struct yaffs_dev *dev)
{
- yaffs_Allocator *allocator = dev->allocator;
- yaffs_ObjectList *tmp;
+ struct yaffs_allocator *allocator = dev->allocator;
+ struct yaffs_obj_list *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;
+ 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;
}
- allocator->freeObjects = NULL;
- allocator->nFreeObjects = 0;
- allocator->nObjectsCreated = 0;
+ INIT_LIST_HEAD(&allocator->free_objs);
+ allocator->n_free_objects = 0;
+ allocator->n_obj_created = 0;
}
-
-static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
+static int yaffs_create_free_objs(struct yaffs_dev *dev, int n_obj)
{
- yaffs_Allocator *allocator = dev->allocator;
-
+ struct yaffs_allocator *allocator = dev->allocator;
int i;
- yaffs_Object *newObjects;
- yaffs_ObjectList *list;
+ struct yaffs_obj *new_objs;
+ struct yaffs_obj_list *list;
- if(!allocator){
- YBUG();
+ if (!allocator) {
+ BUG();
return YAFFS_FAIL;
}
- if (nObjects < 1)
+ if (n_obj < 1)
return YAFFS_OK;
/* make these things */
- newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
- list = YMALLOC(sizeof(yaffs_ObjectList));
-
- 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)));
+ new_objs = kmalloc(n_obj * sizeof(struct yaffs_obj), GFP_NOFS);
+ list = kmalloc(sizeof(struct yaffs_obj_list), GFP_NOFS);
+
+ 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 < nObjects - 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[nObjects - 1].siblings.next = (void *)allocator->freeObjects;
- allocator->freeObjects = newObjects;
- allocator->nFreeObjects += nObjects;
- allocator->nObjectsCreated += nObjects;
+ 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_Object *yaffs_AllocateRawObject(yaffs_Device *dev)
+struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev)
{
- yaffs_Object *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)
- yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
-
- if (allocator->freeObjects) {
- obj = allocator->freeObjects;
- allocator->freeObjects =
- (yaffs_Object *) (allocator->freeObjects->siblings.next);
- allocator->nFreeObjects--;
+ if (list_empty(&allocator->free_objs))
+ yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS);
+
+ 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_FreeRawObject(yaffs_Device *dev, yaffs_Object *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_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev)
+void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev)
{
- if(dev->allocator){
- yaffs_DeinitialiseRawTnodes(dev);
- yaffs_DeinitialiseRawObjects(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_InitialiseRawTnodesAndObjects(yaffs_Device *dev)
+void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev)
{
- yaffs_Allocator *allocator;
-
- if(!dev->allocator){
- allocator = YMALLOC(sizeof(yaffs_Allocator));
- if(allocator){
- dev->allocator = allocator;
- yaffs_InitialiseRawTnodes(dev);
- yaffs_InitialiseRawObjects(dev);
- }
- } else
- YBUG();
-}
+ 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);
+ }
+}
-#endif
projects / yaffs2.git / blobdiff