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Message-Id: <1288636877-7964-6-git-send-email-tdent48227@gmail.com>
Date: Mon, 1 Nov 2010 14:40:53 -0400
From: Tracey Dent <tdent48227@...il.com>
To: greg@...ah.com
Cc: manningc2@...rix.gen.nz, linux-kernel@...r.kernel.org,
linux-fsdevel@...r.kernel.org, Tracey Dent <tdent48227@...il.com>
Subject: [PATCH 05/29] Staging: yaffs2: yaffs_allocator: Add files
Adding files to yaffs2 directory.
Signed-off-by: Tracey Dent <tdent48227@...il.com>
---
drivers/staging/yaffs2/yaffs_allocator.c | 408 ++++++++++++++++++++++++++++++
drivers/staging/yaffs2/yaffs_allocator.h | 30 +++
2 files changed, 438 insertions(+), 0 deletions(-)
create mode 100644 drivers/staging/yaffs2/yaffs_allocator.c
create mode 100644 drivers/staging/yaffs2/yaffs_allocator.h
diff --git a/drivers/staging/yaffs2/yaffs_allocator.c b/drivers/staging/yaffs2/yaffs_allocator.c
new file mode 100644
index 0000000..024ee2a
--- /dev/null
+++ b/drivers/staging/yaffs2/yaffs_allocator.c
@@ -0,0 +1,408 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@...ph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * 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
+
+struct yaffs_tnode_list {
+ struct yaffs_tnode_list *next;
+ yaffs_tnode_t *tnodes;
+};
+
+typedef struct yaffs_tnode_list yaffs_tnodelist_t;
+
+struct yaffs_obj_list_struct {
+ yaffs_obj_t *objects;
+ struct yaffs_obj_list_struct *next;
+};
+
+typedef struct yaffs_obj_list_struct yaffs_obj_list;
+
+
+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_list *allocated_list;
+};
+
+typedef struct yaffs_AllocatorStruct yaffs_Allocator;
+
+
+static void yaffs_deinit_raw_tnodes(yaffs_dev_t *dev)
+{
+
+ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
+
+ yaffs_tnodelist_t *tmp;
+
+ if(!allocator){
+ YBUG();
+ return;
+ }
+
+ while (allocator->allocatedTnodeList) {
+ tmp = allocator->allocatedTnodeList->next;
+
+ YFREE(allocator->allocatedTnodeList->tnodes);
+ YFREE(allocator->allocatedTnodeList);
+ allocator->allocatedTnodeList = tmp;
+
+ }
+
+ allocator->freeTnodes = NULL;
+ allocator->nFreeTnodes = 0;
+ allocator->n_tnodesCreated = 0;
+}
+
+static void yaffs_init_raw_tnodes(yaffs_dev_t *dev)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(allocator){
+ allocator->allocatedTnodeList = NULL;
+ allocator->freeTnodes = NULL;
+ allocator->nFreeTnodes = 0;
+ allocator->n_tnodesCreated = 0;
+ } else
+ YBUG();
+}
+
+static int yaffs_create_tnodes(yaffs_dev_t *dev, int n_tnodes)
+{
+ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
+ int i;
+ yaffs_tnode_t *newTnodes;
+ __u8 *mem;
+ yaffs_tnode_t *curr;
+ yaffs_tnode_t *next;
+ yaffs_tnodelist_t *tnl;
+
+ if(!allocator){
+ YBUG();
+ return YAFFS_FAIL;
+ }
+
+ if (n_tnodes < 1)
+ return YAFFS_OK;
+
+
+ /* make these things */
+
+ newTnodes = YMALLOC(n_tnodes * dev->tnode_size);
+ mem = (__u8 *)newTnodes;
+
+ if (!newTnodes) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
+ 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->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;
+
+ allocator->nFreeTnodes += n_tnodes;
+ allocator->n_tnodesCreated += 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));
+ if (!tnl) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs: Could not add tnodes to management list" TENDSTR)));
+ return YAFFS_FAIL;
+ } else {
+ tnl->tnodes = newTnodes;
+ tnl->next = allocator->allocatedTnodeList;
+ allocator->allocatedTnodeList = tnl;
+ }
+
+ T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
+
+ return YAFFS_OK;
+}
+
+
+yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev)
+{
+ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
+ yaffs_tnode_t *tn = NULL;
+
+ if(!allocator){
+ YBUG();
+ return NULL;
+ }
+
+ /* If there are none left make more */
+ if (!allocator->freeTnodes)
+ yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES);
+
+ if (allocator->freeTnodes) {
+ tn = allocator->freeTnodes;
+ allocator->freeTnodes = allocator->freeTnodes->internal[0];
+ allocator->nFreeTnodes--;
+ }
+
+ 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)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(!allocator){
+ YBUG();
+ return;
+ }
+
+ if (tn) {
+ tn->internal[0] = allocator->freeTnodes;
+ allocator->freeTnodes = tn;
+ allocator->nFreeTnodes++;
+ }
+ dev->checkpoint_blocks_required = 0; /* force recalculation*/
+}
+
+
+
+static void yaffs_init_raw_objs(yaffs_dev_t *dev)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(allocator) {
+ allocator->allocated_list = 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_list *tmp;
+
+ if(!allocator){
+ YBUG();
+ return;
+ }
+
+ while (allocator->allocated_list) {
+ tmp = allocator->allocated_list->next;
+ YFREE(allocator->allocated_list->objects);
+ YFREE(allocator->allocated_list);
+
+ allocator->allocated_list = tmp;
+ }
+
+ allocator->freeObjects = NULL;
+ allocator->nFreeObjects = 0;
+ allocator->n_objCreated = 0;
+}
+
+
+static int yaffs_create_free_objs(yaffs_dev_t *dev, int n_obj)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+
+ int i;
+ yaffs_obj_t *newObjects;
+ yaffs_obj_list *list;
+
+ if(!allocator){
+ YBUG();
+ return YAFFS_FAIL;
+ }
+
+ if (n_obj < 1)
+ return YAFFS_OK;
+
+ /* make these things */
+ newObjects = YMALLOC(n_obj * sizeof(yaffs_obj_t));
+ list = YMALLOC(sizeof(yaffs_obj_list));
+
+ 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)));
+ 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]);
+ }
+
+ newObjects[n_obj - 1].siblings.next = (void *)allocator->freeObjects;
+ allocator->freeObjects = newObjects;
+ allocator->nFreeObjects += n_obj;
+ allocator->n_objCreated += n_obj;
+
+ /* Now add this bunch of Objects to a list for freeing up. */
+
+ list->objects = newObjects;
+ list->next = allocator->allocated_list;
+ allocator->allocated_list = list;
+
+ return YAFFS_OK;
+}
+
+yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev)
+{
+ yaffs_obj_t *obj = NULL;
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(!allocator) {
+ YBUG();
+ return obj;
+ }
+
+ /* If there are none left make more */
+ if (!allocator->freeObjects)
+ 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--;
+ }
+
+ return obj;
+}
+
+
+void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj)
+{
+
+ 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++;
+ }
+}
+
+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
diff --git a/drivers/staging/yaffs2/yaffs_allocator.h b/drivers/staging/yaffs2/yaffs_allocator.h
new file mode 100644
index 0000000..777f3b0
--- /dev/null
+++ b/drivers/staging/yaffs2/yaffs_allocator.h
@@ -0,0 +1,30 @@
+/*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@...ph1.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
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
+#ifndef __YAFFS_ALLOCATOR_H__
+#define __YAFFS_ALLOCATOR_H__
+
+#include "yaffs_guts.h"
+
+void yaffs_init_raw_tnodes_and_objs(yaffs_dev_t *dev);
+void yaffs_deinit_raw_tnodes_and_objs(yaffs_dev_t *dev);
+
+yaffs_tnode_t *yaffs_alloc_raw_tnode(yaffs_dev_t *dev);
+void yaffs_free_raw_tnode(yaffs_dev_t *dev, yaffs_tnode_t *tn);
+
+yaffs_obj_t *yaffs_alloc_raw_obj(yaffs_dev_t *dev);
+void yaffs_free_raw_obj(yaffs_dev_t *dev, yaffs_obj_t *obj);
+
+#endif
--
1.7.3.2.146.gca209
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