--- /dev/null
+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002 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 General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *
+ * This version hacked for emulating 2kpage NAND for YAFFS2 testing.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/fs.h>
+#include <linux/proc_fs.h>
+#include <linux/pagemap.h>
+#include <linux/mtd/mtd.h>
+#include <linux/interrupt.h>
+#include <linux/string.h>
+#include <linux/locks.h>
+
+#include <asm/uaccess.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/nand.h>
+
+#define T(f,x) printk x
+#define ALLOCATE(x) kmalloc(x,GFP_KERNEL)
+#define FREE(x) kfree(x)
+
+
+
+
+
+#define EM_SIZE_IN_MEG 4
+#define PAGE_DATA_SIZE (2048)
+#define PAGE_SPARE_SIZE (64)
+#define PAGES_PER_BLOCK (64)
+#define NAND_SHIFT (11) // Shifter for 2k
+
+
+#define EM_SIZE_IN_BYTES (EM_SIZE_IN_MEG * (1<<20))
+
+#define PAGE_TOTAL_SIZE (PAGE_DATA_SIZE+PAGE_SPARE_SIZE)
+
+#define BLOCK_TOTAL_SIZE (PAGES_PER_BLOCK * PAGE_TOTAL_SIZE)
+
+#define BLOCKS_PER_MEG ((1<<20)/(PAGES_PER_BLOCK * PAGE_DATA_SIZE))
+
+
+static struct mtd_info nandemul2k_mtd;
+
+typedef struct
+{
+ __u8 data[PAGE_TOTAL_SIZE]; // Data + spare
+ int empty; // is this empty?
+} nandemul_Page;
+
+
+typedef struct
+{
+ nandemul_Page *page[PAGES_PER_BLOCK];
+ int damaged;
+} nandemul_Block;
+
+
+
+typedef struct
+{
+ nandemul_Block**block;
+ int nBlocks;
+} nandemul_Device;
+
+static nandemul_Device ned;
+
+static int sizeInMB = EM_SIZE_IN_MEG;
+
+
+static void nandemul_yield(int n)
+{
+#ifdef __KERNEL__
+ if(n > 0) schedule_timeout(n);
+#endif
+
+}
+
+
+static void nandemul2k_Read(void *buffer, int page, int start, int nBytes)
+{
+ int pg = page%PAGES_PER_BLOCK;
+ int blk = page/PAGES_PER_BLOCK;
+ if(buffer && nBytes > 0)
+ {
+ memcpy(buffer,&ned.block[blk]->page[pg]->data[start],nBytes);
+ }
+
+}
+
+static void nandemul2k_Program(const void *buffer, int page, int start, int nBytes)
+{
+ int pg = page%PAGES_PER_BLOCK;
+ int blk = page/PAGES_PER_BLOCK;
+ __u8 *p;
+ __u8 *b = (__u8 *)buffer;
+
+ p = &ned.block[blk]->page[pg]->data[start];
+
+ while(buffer && nBytes>0)
+ {
+ *p = *p & *b;
+ p++;
+ b++;
+ nBytes--;
+ }
+}
+
+static void nandemul2k_DoErase(int blockNumber)
+{
+ int i;
+
+ nandemul_Block *blk;
+
+ if(blockNumber < 0 || blockNumber >= ned.nBlocks)
+ {
+ return;
+ }
+
+ blk = ned.block[blockNumber];
+
+ for(i = 0; i < PAGES_PER_BLOCK; i++)
+ {
+ memset(blk->page[i],0xff,sizeof(nandemul_Page));
+ blk->page[i]->empty = 1;
+ }
+ nandemul_yield(2);
+}
+
+
+static int nandemul2k_CalcNBlocks(void)
+{
+ return EM_SIZE_IN_MEG * BLOCKS_PER_MEG;
+}
+
+
+
+static int CheckInit(void)
+{
+ static int initialised = 0;
+
+ int i,j;
+
+ int fail = 0;
+ int nBlocks;
+
+ int nAllocated = 0;
+
+ if(initialised)
+ {
+ return 0;
+ }
+
+
+ ned.nBlocks = nBlocks = nandemul2k_CalcNBlocks();
+
+
+ ned.block = ALLOCATE(sizeof(nandemul_Block*) * nBlocks );
+
+ if(!ned.block) return ENOMEM;
+
+
+
+
+
+ for(i=fail=0; i <nBlocks; i++)
+ {
+
+ nandemul_Block *blk;
+
+ if(!(blk = ned.block[i] = ALLOCATE(sizeof(nandemul_Block))))
+ {
+ fail = 1;
+ }
+ else
+ {
+ for(j = 0; j < PAGES_PER_BLOCK; j++)
+ {
+ if((blk->page[j] = ALLOCATE(sizeof(nandemul_Page))) == 0)
+ {
+ fail = 1;
+ }
+ }
+ nandemul2k_DoErase(i);
+ ned.block[i]->damaged = 0;
+ nAllocated++;
+ }
+ }
+
+ if(fail)
+ {
+ //Todo thump pages
+
+ for(i = 0; i < nAllocated; i++)
+ {
+ FREE(ned.block[i]);
+ }
+ FREE(ned.block);
+
+ return ENOMEM;
+ }
+
+ ned.nBlocks = nBlocks;
+
+ initialised = 1;
+
+ return 1;
+}
+
+
+
+static void nandemul2k_CleanUp(void)
+{
+ int i,j;
+
+ for(i = 0; i < ned.nBlocks; i++)
+ {
+ for(j = 0; j < PAGES_PER_BLOCK; j++)
+ {
+ FREE(ned.block[i]->page[j]);
+ }
+ FREE(ned.block[i]);
+
+ }
+ FREE(ned.block);
+ ned.block = 0;
+}
+
+int nandemul2k_GetBytesPerChunk(void) { return PAGE_DATA_SIZE;}
+
+int nandemul2k_GetChunksPerBlock(void) { return PAGES_PER_BLOCK; }
+int nandemul2k_GetNumberOfBlocks(void) {return nandemul2k_CalcNBlocks();}
+
+
+
+int nandemul2k_ReadId(__u8 *vendorId, __u8 *deviceId)
+{
+ *vendorId = 'Y';
+ *deviceId = '2';
+
+ return 1;
+}
+
+
+int nandemul2k_ReadStatus(__u8 *status)
+{
+ *status = 0;
+ return 1;
+}
+
+
+#ifdef CONFIG_MTD_NAND_ECC
+#include <linux/mtd/nand_ecc.h>
+#endif
+
+/*
+ * NAND low-level MTD interface functions
+ */
+static int nand_read (struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf);
+static int nand_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf, u_char *oob_buf, struct nand_oobinfo *dummy);
+static int nand_read_oob (struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf);
+static int nand_write (struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf);
+static int nand_write_ecc (struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf,
+ const u_char *oob_buf, struct nand_oobinfo *dummy);
+static int nand_write_oob (struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf);
+static int nand_writev (struct mtd_info *mtd, const struct iovec *vecs,
+ unsigned long count, loff_t to, size_t *retlen);
+static int nand_erase (struct mtd_info *mtd, struct erase_info *instr);
+static void nand_sync (struct mtd_info *mtd);
+
+
+
+/*
+ * NAND read
+ */
+static int nand_read (struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ return nand_read_ecc (mtd, from, len, retlen, buf, NULL,NULL);
+}
+
+
+/*
+ * NAND read with ECC
+ */
+static int nand_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf, u_char *oob_buf,struct nand_oobinfo *oobsel)
+{
+ int start, page;
+ int n = len;
+ int nToCopy;
+
+
+
+ /* Do not allow reads past end of device */
+ if ((from + len) > mtd->size) {
+ *retlen = 0;
+ return -EINVAL;
+ }
+
+
+ /* Initialize return value */
+ *retlen = 0;
+
+ while(n > 0)
+ {
+
+ /* First we calculate the starting page */
+ page = from >> NAND_SHIFT;
+
+ /* Get raw starting column */
+
+ start = from & (mtd->oobblock-1);
+
+ // OK now check for the curveball where the start and end are in
+ // the same page
+ if((start + n) < mtd->oobblock)
+ {
+ nToCopy = n;
+ }
+ else
+ {
+ nToCopy = mtd->oobblock - start;
+ }
+
+ nandemul2k_Read(buf, page, start, nToCopy);
+ nandemul2k_Read(oob_buf,page,PAGE_DATA_SIZE,PAGE_SPARE_SIZE);
+
+ n -= nToCopy;
+ from += nToCopy;
+ buf += nToCopy;
+ if(oob_buf) oob_buf += PAGE_SPARE_SIZE;
+ *retlen += nToCopy;
+
+ }
+
+
+ return 0;
+}
+
+/*
+ * NAND read out-of-band
+ */
+static int nand_read_oob (struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ int col, page;
+
+ T(0,("nand_read_oob: from = 0x%08x, buf = 0x%08x, len = %i\n", (unsigned int) from, (unsigned int) buf,
+ (int) len));
+
+ /* Shift to get page */
+ page = ((int) from) >> NAND_SHIFT;
+
+ /* Mask to get column */
+ col = from & 0x0f;
+
+ /* Initialize return length value */
+ *retlen = 0;
+
+ /* Do not allow reads past end of device */
+ if ((from + len) > mtd->size) {
+ T(0,
+ ("nand_read_oob: Attempt read beyond end of device\n"));
+ *retlen = 0;
+ return -EINVAL;
+ }
+
+ nandemul2k_Read(buf,page,PAGE_DATA_SIZE + col,len);
+
+ /* Return happy */
+ *retlen = len;
+ return 0;
+}
+
+/*
+ * NAND write
+ */
+static int nand_write (struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
+{
+ return nand_write_ecc (mtd, to, len, retlen, buf, NULL,NULL);
+}
+
+/*
+ * NAND write with ECC
+ */
+static int nand_write_ecc (struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf,
+ const u_char *oob_buf, struct nand_oobinfo *dummy)
+{
+
+ int start, page;
+ int n = len;
+ int nToCopy;
+
+
+
+ /* Do not allow reads past end of device */
+ if ((to + len) > mtd->size) {
+ *retlen = 0;
+ return -EINVAL;
+ }
+
+
+ /* Initialize return value */
+ *retlen = 0;
+
+ while(n > 0)
+ {
+
+ /* First we calculate the starting page */
+ page = to >> NAND_SHIFT;
+
+ /* Get raw starting column */
+
+ start = to & (mtd->oobblock - 1);
+
+ // OK now check for the curveball where the start and end are in
+ // the same page
+ if((start + n) < mtd->oobblock)
+ {
+ nToCopy = n;
+ }
+ else
+ {
+ nToCopy = mtd->oobblock - start;
+ }
+
+ nandemul2k_Program(buf, page, start, nToCopy);
+ nandemul2k_Program(oob_buf, page, PAGE_DATA_SIZE, PAGE_SPARE_SIZE);
+
+ n -= nToCopy;
+ to += nToCopy;
+ buf += nToCopy;
+ if(oob_buf) oob_buf += PAGE_SPARE_SIZE;
+ *retlen += nToCopy;
+
+ }
+
+
+ return 0;
+}
+
+/*
+ * NAND write out-of-band
+ */
+static int nand_write_oob (struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
+{
+ int col, page;
+
+
+ T(0,(
+ "nand_read_oob: to = 0x%08x, len = %i\n", (unsigned int) to,
+ (int) len));
+
+ /* Shift to get page */
+ page = ((int) to) >> NAND_SHIFT;
+
+ /* Mask to get column */
+ col = to & 0x0f;
+
+ /* Initialize return length value */
+ *retlen = 0;
+
+ /* Do not allow reads past end of device */
+ if ((to + len) > mtd->size) {
+ T(0,(
+ "nand_read_oob: Attempt read beyond end of device\n"));
+ *retlen = 0;
+ return -EINVAL;
+ }
+
+ nandemul2k_Program(buf,page,512 + col,len);
+
+ /* Return happy */
+ *retlen = len;
+ return 0;
+
+}
+
+/*
+ * NAND write with iovec
+ */
+static int nand_writev (struct mtd_info *mtd, const struct iovec *vecs,
+ unsigned long count, loff_t to, size_t *retlen)
+{
+ return -EINVAL;
+}
+
+/*
+ * NAND erase a block
+ */
+static int nand_erase (struct mtd_info *mtd, struct erase_info *instr)
+{
+ int i, nBlocks,block;
+
+ T(0,(
+ "nand_erase: start = 0x%08x, len = %i\n",
+ (unsigned int) instr->addr, (unsigned int) instr->len));
+
+ /* Start address must align on block boundary */
+ if (instr->addr & (mtd->erasesize - 1)) {
+ T(0,(
+ "nand_erase: Unaligned address\n"));
+ return -EINVAL;
+ }
+
+ /* Length must align on block boundary */
+ if (instr->len & (mtd->erasesize - 1)) {
+ T(0,(
+ "nand_erase: Length not block aligned\n"));
+ return -EINVAL;
+ }
+
+ /* Do not allow erase past end of device */
+ if ((instr->len + instr->addr) > mtd->size) {
+ T(0,(
+ "nand_erase: Erase past end of device\n"));
+ return -EINVAL;
+ }
+
+ nBlocks = instr->len >> (NAND_SHIFT + 5);
+ block = instr->addr >> (NAND_SHIFT + 5);
+
+ for(i = 0; i < nBlocks; i++)
+ {
+ nandemul2k_DoErase(block);
+ block++;
+ }
+
+
+
+ return 0;
+
+
+}
+
+
+int nand_block_isbad(struct mtd_info *mtd,int blockNo)
+{
+ return 0;
+}
+
+int nand_block_markbad(struct mtd_info *mtd, int blockNo)
+{
+ return 0;
+}
+
+
+/*
+ * NAND sync
+ */
+static void nand_sync (struct mtd_info *mtd)
+{
+ T(0,("nand_sync: called\n"));
+
+}
+
+/*
+ * Scan for the NAND device
+ */
+int nand_scan (struct mtd_info *mtd,int nchips)
+{
+ mtd->oobblock = PAGE_DATA_SIZE;
+ mtd->oobsize = PAGE_SPARE_SIZE;
+ mtd->erasesize = PAGE_DATA_SIZE * PAGES_PER_BLOCK;
+ mtd->size = sizeInMB * 1024*1024;
+
+
+
+ /* Fill in remaining MTD driver data */
+ mtd->type = MTD_NANDFLASH;
+ mtd->flags = MTD_CAP_NANDFLASH;
+ mtd->owner = THIS_MODULE;
+ mtd->ecctype = MTD_ECC_NONE;
+ mtd->erase = nand_erase;
+ mtd->point = NULL;
+ mtd->unpoint = NULL;
+ mtd->read = nand_read;
+ mtd->write = nand_write;
+ mtd->read_ecc = nand_read_ecc;
+ mtd->write_ecc = nand_write_ecc;
+ mtd->read_oob = nand_read_oob;
+ mtd->write_oob = nand_write_oob;
+ mtd->block_isbad = nand_block_isbad;
+ mtd->block_markbad = nand_block_markbad;
+ mtd->readv = NULL;
+ mtd->writev = nand_writev;
+ mtd->sync = nand_sync;
+ mtd->lock = NULL;
+ mtd->unlock = NULL;
+ mtd->suspend = NULL;
+ mtd->resume = NULL;
+
+ /* Return happy */
+ return 0;
+}
+
+#if 0
+#ifdef MODULE
+MODULE_PARM(sizeInMB, "i");
+
+__setup("sizeInMB=",sizeInMB);
+#endif
+#endif
+
+/*
+ * Define partitions for flash devices
+ */
+
+static struct mtd_partition nandemul2k_partition[] =
+{
+ { name: "NANDemul partition 1",
+ offset: 0,
+ size: 0 },
+};
+
+static int nPartitions = sizeof(nandemul2k_partition)/sizeof(nandemul2k_partition[0]);
+
+/*
+ * Main initialization routine
+ */
+int __init nandemul2k_init (void)
+{
+
+ // Do the nand init
+
+ CheckInit();
+
+ nand_scan(&nandemul2k_mtd,1);
+
+ // Build the partition table
+
+ nandemul2k_partition[0].size = sizeInMB * 1024 * 1024;
+
+ // Register the partition
+ add_mtd_partitions(&nandemul2k_mtd,nandemul2k_partition,nPartitions);
+
+ return 0;
+
+}
+
+module_init(nandemul2k_init);
+
+/*
+ * Clean up routine
+ */
+#ifdef MODULE
+static void __exit nandemul2k_cleanup (void)
+{
+
+ nandemul2k_CleanUp();
+
+ /* Unregister partitions */
+ del_mtd_partitions(&nandemul2k_mtd);
+
+ /* Unregister the device */
+ del_mtd_device (&nandemul2k_mtd);
+
+}
+module_exit(nandemul2k_cleanup);
+#endif
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Charles Manning <manningc@aleph1.co.uk>");
+MODULE_DESCRIPTION("2k Page/128k Block NAND emulated in RAM");
+
+
+
+
--- /dev/null
+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * yaffs_fs.c
+ *
+ * Copyright (C) 2002 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 General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This is the file system front-end to YAFFS that hooks it up to
+ * the VFS.
+ *
+ * Special notes:
+ * >> sb->u.generic_sbp points to the yaffs_Device associated with this superblock
+ * >> inode->u.generic_ip points to the associated yaffs_Object.
+ *
+ *
+ * Acknowledgements:
+ * * Luc van OostenRyck for numerous patches.
+ * * Nick Bane for numerous patches.
+ * * Nick Bane for 2.5/2.6 integration.
+ * * Andras Toth for mknod rdev issue.
+ * * Michael Fischer for finding the problem with inode inconsistency.
+ * * Some code bodily lifted from JFFS2.
+ */
+
+
+const char *yaffs_fs_c_version = "$Id: yaffs_fs.c,v 1.1 2004-12-17 04:39:04 charles Exp $";
+extern const char *yaffs_guts_c_version;
+
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/fs.h>
+#include <linux/proc_fs.h>
+#include <linux/pagemap.h>
+#include <linux/mtd/mtd.h>
+#include <linux/interrupt.h>
+#include <linux/string.h>
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+
+#include <linux/statfs.h> /* Added NCB 15-8-2003 */
+#include <asm/statfs.h>
+#define UnlockPage(p) unlock_page(p)
+#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
+//#define kdevname(x) cdevname(to_kdev_t(x))
+#define kdevname(x) "(unavailable)" // temporary fix
+
+#else
+
+#include <linux/locks.h>
+
+#endif
+
+
+#include <asm/uaccess.h>
+
+#include "yportenv.h"
+#include "yaffs_guts.h"
+
+
+
+
+//unsigned yaffs_traceMask = YAFFS_TRACE_ALWAYS | YAFFS_TRACE_BAD_BLOCKS;
+unsigned yaffs_traceMask = 0xFFFFFFFF;
+
+
+#ifdef CONFIG_YAFFS_RAM_ENABLED
+#include "yaffs_nandemul.h"
+// 2 MB of RAM for emulation
+#define YAFFS_RAM_EMULATION_SIZE 0x200000
+#endif //CONFIG_YAFFS_RAM_ENABLED
+
+#if CONFIG_YAFFS2_RAM_ENABLED
+#include "yaffs_nandemul2k.h"
+#endif
+
+#ifdef CONFIG_YAFFS_MTD_ENABLED
+#include <linux/mtd/mtd.h>
+#include "yaffs_mtdif.h"
+#include "yaffs_mtdif2.h"
+#endif //CONFIG_YAFFS_MTD_ENABLED
+
+//#define T(x) printk x
+
+
+
+#define yaffs_InodeToObject(iptr) ((yaffs_Object *)((iptr)->u.generic_ip))
+#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
+//NCB #define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
+
+//#if defined(CONFIG_KERNEL_2_5)
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
+#else
+#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
+#endif
+
+
+static void yaffs_put_super(struct super_block *sb);
+
+#if 0
+static ssize_t yaffs_file_read(struct file *f, char *buf, size_t n, loff_t *pos);
+#endif
+
+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, loff_t *pos);
+
+static int yaffs_file_flush(struct file* file);
+
+static int yaffs_sync_object(struct file * file, struct dentry *dentry, int datasync);
+
+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
+
+//#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *n);
+static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *n);
+#else
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
+static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry);
+#endif
+static int yaffs_link(struct dentry *old_dentry, struct inode * dir, struct dentry * dentry);
+static int yaffs_unlink(struct inode * dir, struct dentry *dentry);
+static int yaffs_symlink(struct inode * dir, struct dentry *dentry, const char * symname);
+static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode);
+
+//#if defined(CONFIG_KERNEL_2_5)
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev);
+#else
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, int dev);
+#endif
+static int yaffs_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir,struct dentry *new_dentry);
+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
+
+//#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
+#else
+static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
+#endif
+static void yaffs_read_inode (struct inode *inode);
+
+//#if defined(CONFIG_KERNEL_2_5)
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static struct super_block *yaffs_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data);
+#else
+static struct super_block *yaffs_read_super(struct super_block * sb, void * data, int silent);
+#endif
+
+static void yaffs_put_inode (struct inode *inode);
+static void yaffs_delete_inode(struct inode *);
+static void yaffs_clear_inode(struct inode *);
+
+static int yaffs_readpage(struct file *file, struct page * page);
+static int yaffs_writepage(struct page *page);
+static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to);
+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to);
+
+static int yaffs_readlink(struct dentry *dentry, char *buffer, int buflen);
+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+
+
+
+
+static struct address_space_operations yaffs_file_address_operations = {
+ readpage: yaffs_readpage,
+ writepage: yaffs_writepage,
+ prepare_write: yaffs_prepare_write,
+ commit_write: yaffs_commit_write
+};
+
+
+static struct file_operations yaffs_file_operations = {
+
+ read: generic_file_read,
+ write: generic_file_write,
+
+ mmap: generic_file_mmap,
+ flush: yaffs_file_flush,
+ fsync: yaffs_sync_object,
+};
+
+
+static struct inode_operations yaffs_file_inode_operations = {
+ setattr: yaffs_setattr,
+};
+
+
+struct inode_operations yaffs_symlink_inode_operations =
+{
+ readlink: yaffs_readlink,
+ follow_link: yaffs_follow_link,
+ setattr: yaffs_setattr
+};
+
+static struct inode_operations yaffs_dir_inode_operations = {
+ create: yaffs_create,
+ lookup: yaffs_lookup,
+ link: yaffs_link,
+ unlink: yaffs_unlink,
+ symlink: yaffs_symlink,
+ mkdir: yaffs_mkdir,
+ rmdir: yaffs_unlink,
+ mknod: yaffs_mknod,
+ rename: yaffs_rename,
+ setattr: yaffs_setattr,
+};
+
+static struct file_operations yaffs_dir_operations = {
+ read: generic_read_dir,
+ readdir: yaffs_readdir,
+ fsync: yaffs_sync_object,
+};
+
+
+static struct super_operations yaffs_super_ops = {
+ statfs: yaffs_statfs,
+ read_inode: yaffs_read_inode,
+ put_inode: yaffs_put_inode,
+ put_super: yaffs_put_super,
+// remount_fs:
+ delete_inode: yaffs_delete_inode,
+ clear_inode: yaffs_clear_inode,
+};
+
+
+
+static void yaffs_GrossLock(yaffs_Device *dev)
+{
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs locking\n"));
+
+ down(&dev->grossLock);
+}
+
+static void yaffs_GrossUnlock(yaffs_Device *dev)
+{
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs unlocking\n"));
+ up(&dev->grossLock);
+
+}
+
+static int yaffs_readlink(struct dentry *dentry, char *buffer, int buflen)
+{
+ unsigned char *alias;
+ int ret;
+
+ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+
+
+ yaffs_GrossLock(dev);
+
+ alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
+
+ yaffs_GrossUnlock(dev);
+
+ if(!alias)
+ return -ENOMEM;
+
+ ret = vfs_readlink(dentry, buffer, buflen, alias);
+ kfree(alias);
+ return ret;
+}
+
+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ unsigned char *alias;
+ int ret;
+ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+
+
+ yaffs_GrossLock(dev);
+
+ alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
+
+ yaffs_GrossUnlock(dev);
+
+ if(!alias)
+ return -ENOMEM;
+
+ ret = vfs_follow_link(nd,alias);
+ kfree(alias);
+ return ret;
+}
+
+
+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj);
+
+/*
+ * Lookup is used to find objects in the fs
+ */
+//#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+
+static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *n)
+#else
+static struct dentry * yaffs_lookup(struct inode *dir, struct dentry *dentry)
+#endif
+{
+ yaffs_Object *obj;
+ struct inode *inode = NULL; // NCB 2.5/2.6 needs NULL here
+
+ yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
+
+
+ yaffs_GrossLock(dev);
+
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup for %d:%s\n",yaffs_InodeToObject(dir)->objectId,dentry->d_name.name));
+
+ obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir),dentry->d_name.name);
+
+ obj = yaffs_GetEquivalentObject(obj); // in case it was a hardlink
+
+
+
+ if(obj)
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup found %d\n",obj->objectId));
+
+ inode = yaffs_get_inode(dir->i_sb, obj->st_mode,0,obj);
+
+ if(inode)
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_loookup dentry \n"));
+/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to d_add even if NULL inode */
+#if 0
+ //dget(dentry); // try to solve directory bug
+ d_add(dentry,inode);
+
+ yaffs_GrossUnlock(dev);
+
+ // return dentry;
+ return NULL;
+#endif
+ }
+
+ }
+ else
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_lookup not found\n"));
+
+ }
+ yaffs_GrossUnlock(dev);
+
+/* added NCB for 2.5/6 compatability - forces add even if inode is NULL which creates dentry hash*/
+ d_add(dentry,inode);
+
+ return NULL;
+ // return (ERR_PTR(-EIO));
+
+}
+
+// For now put inode is just for debugging
+// Put inode is called when the inode **structure** is put.
+static void yaffs_put_inode(struct inode *inode)
+{
+ T(YAFFS_TRACE_OS,("yaffs_put_inode: ino %d, count %d\n",(int)inode->i_ino, atomic_read(&inode->i_count)));
+
+}
+
+// clear is called to tell the fs to release any per-inode data it holds
+static void yaffs_clear_inode(struct inode *inode)
+{
+ yaffs_Object *obj;
+ yaffs_Device *dev;
+
+ obj = yaffs_InodeToObject(inode);
+
+ T(YAFFS_TRACE_OS,("yaffs_clear_inode: ino %d, count %d %s\n",(int)inode->i_ino, atomic_read(&inode->i_count),
+ obj ? "object exists" : "null object"));
+
+ if(obj)
+ {
+ dev = obj->myDev;
+ yaffs_GrossLock(dev);
+
+ // Clear the association between the inode ant the yaffs_Object.
+ obj->myInode = NULL;
+ inode->u.generic_ip = NULL;
+
+ // If the object freeing was deferred, then the real free happens now.
+ // This should fix the inode inconsistency problem.
+
+ yaffs_HandleDeferedFree(obj);
+
+ yaffs_GrossUnlock(dev);
+ }
+
+
+}
+
+// delete is called when the link count is zero and the inode
+// is put (ie. nobody wants to know about it anymore, time to
+// delete the file).
+// NB Must call clear_inode()
+static void yaffs_delete_inode(struct inode *inode)
+{
+ yaffs_Object *obj = yaffs_InodeToObject(inode);
+ yaffs_Device *dev;
+
+ T(YAFFS_TRACE_OS,("yaffs_delete_inode: ino %d, count %d %s\n",(int)inode->i_ino, atomic_read(&inode->i_count),
+ obj ? "object exists" : "null object"));
+
+ if(obj)
+ {
+ dev = obj->myDev;
+ yaffs_GrossLock(dev);
+ yaffs_DeleteFile(obj);
+ yaffs_GrossUnlock(dev);
+ }
+ clear_inode(inode);
+}
+
+
+static int yaffs_file_flush(struct file* file)
+{
+ yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry);
+
+ yaffs_Device *dev = obj->myDev;
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_flush object %d (%s)\n",obj->objectId,
+ obj->dirty ? "dirty" : "clean"));
+
+ yaffs_GrossLock(dev);
+
+ yaffs_FlushFile(obj,1);
+
+ yaffs_GrossUnlock(dev);
+
+ return 0;
+}
+
+
+
+static int yaffs_readpage_nolock(struct file *f, struct page * pg)
+{
+ // Lifted from jffs2
+
+ yaffs_Object *obj;
+ unsigned char *pg_buf;
+ int ret;
+
+ yaffs_Device *dev;
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage at %08x, size %08x\n",
+ (unsigned)(pg->index << PAGE_CACHE_SHIFT), (unsigned)PAGE_CACHE_SIZE));
+
+ obj = yaffs_DentryToObject(f->f_dentry);
+
+ dev = obj->myDev;
+
+
+ if (!PageLocked(pg))
+ PAGE_BUG(pg);
+
+ pg_buf = kmap(pg);
+ /* FIXME: Can kmap fail? */
+
+ yaffs_GrossLock(dev);
+
+ ret = yaffs_ReadDataFromFile(obj, pg_buf, pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE);
+
+ yaffs_GrossUnlock(dev);
+
+ if(ret >= 0) ret = 0;
+
+ if (ret) {
+ ClearPageUptodate(pg);
+ SetPageError(pg);
+ } else {
+ SetPageUptodate(pg);
+ ClearPageError(pg);
+ }
+
+ flush_dcache_page(pg);
+ kunmap(pg);
+
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readpage done\n"));
+ return ret;
+}
+
+static int yaffs_readpage_unlock(struct file *f, struct page *pg)
+{
+ int ret = yaffs_readpage_nolock(f,pg);
+ UnlockPage(pg);
+ return ret;
+}
+
+static int yaffs_readpage(struct file *f, struct page * pg)
+{
+ return yaffs_readpage_unlock(f,pg);
+}
+
+// writepage inspired by/stolen from smbfs
+//
+
+static int yaffs_writepage(struct page *page)
+{
+ struct address_space *mapping = page->mapping;
+ struct inode *inode;
+ unsigned long end_index;
+ char *buffer;
+ yaffs_Object *obj;
+ int nWritten = 0;
+ unsigned nBytes;
+
+ if (!mapping)
+ BUG();
+ inode = mapping->host;
+ if (!inode)
+ BUG();
+
+ end_index = inode->i_size >> PAGE_CACHE_SHIFT;
+
+ /* easy case */
+ if (page->index < end_index)
+ {
+ nBytes = PAGE_CACHE_SIZE;
+ }
+ else
+ {
+ nBytes = inode->i_size & (PAGE_CACHE_SIZE-1);
+ }
+ // What's happening here?
+ ///* OK, are we completely out? */
+ //if (page->index >= end_index+1 || !offset)
+ // return -EIO;
+
+ get_page(page);
+
+
+ buffer = kmap(page);
+
+ obj = yaffs_InodeToObject(inode);
+ yaffs_GrossLock(obj->myDev);
+
+
+ nWritten = yaffs_WriteDataToFile(obj,buffer,page->index << PAGE_CACHE_SHIFT,nBytes);
+
+ yaffs_GrossUnlock(obj->myDev);
+
+ kunmap(page);
+ SetPageUptodate(page);
+ UnlockPage(page);
+ put_page(page);
+
+ return (nWritten == nBytes) ? 0 : -ENOSPC;
+}
+
+
+
+static int yaffs_prepare_write(struct file *f, struct page *pg, unsigned offset, unsigned to)
+{
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_prepair_write\n"));
+ if(!Page_Uptodate(pg) && (offset || to < PAGE_CACHE_SIZE))
+ return yaffs_readpage_nolock(f,pg);
+
+ return 0;
+
+}
+
+static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, unsigned to)
+{
+
+ void *addr = page_address(pg) + offset;
+ loff_t pos = (((loff_t)pg->index) << PAGE_CACHE_SHIFT) + offset;
+ int nBytes = to - offset;
+ int nWritten;
+
+ unsigned spos = pos;
+ unsigned saddr = (unsigned)addr;
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write addr %x pos %x nBytes %d\n",saddr,spos,nBytes));
+
+ nWritten = yaffs_file_write(f,addr, nBytes, &pos);
+
+ if(nWritten != nBytes)
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write not same size nWritten %d nBytes %d\n",nWritten,nBytes));
+ SetPageError(pg);
+ ClearPageUptodate(pg);
+ }
+ else
+ {
+ SetPageUptodate(pg);
+ }
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_commit_write returning %d\n",nWritten));
+
+ return nWritten;
+
+}
+
+
+
+static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj)
+{
+ if (inode && obj)
+ {
+ inode->i_ino = obj->objectId;
+ inode->i_mode = obj->st_mode;
+ inode->i_uid = obj->st_uid;
+ inode->i_gid = obj->st_gid;
+ inode->i_blksize = inode->i_sb->s_blocksize;
+//#if defined(CONFIG_KERNEL_2_5)
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+
+ inode->i_rdev = old_decode_dev(obj->st_rdev);
+ inode->i_atime.tv_sec = (time_t)(obj->st_atime);
+ inode->i_atime.tv_nsec = 0;
+ inode->i_mtime.tv_sec = (time_t)obj->st_mtime;
+ inode->i_mtime.tv_nsec =0;
+ inode->i_ctime.tv_sec = (time_t)obj->st_ctime;
+ inode->i_ctime.tv_nsec = 0;
+#else
+ inode->i_rdev = obj->st_rdev;
+ inode->i_atime = obj->st_atime;
+ inode->i_mtime = obj->st_mtime;
+ inode->i_ctime = obj->st_ctime;
+#endif
+ inode->i_size = yaffs_GetObjectFileLength(obj);
+ inode->i_blocks = (inode->i_size + 511) >> 9;
+
+ inode->i_nlink = yaffs_GetObjectLinkCount(obj);
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FillInode mode %x uid %d gid %d size %d count %d\n",
+ inode->i_mode, inode->i_uid, inode->i_gid, (int)inode->i_size, atomic_read(&inode->i_count)));
+
+ switch (obj->st_mode & S_IFMT)
+ {
+ default: // fifo, device or socket
+ init_special_inode(inode, obj->st_mode,(dev_t)(obj->st_rdev));
+ break;
+ case S_IFREG: // file
+ inode->i_op = &yaffs_file_inode_operations;
+ inode->i_fop = &yaffs_file_operations;
+ inode->i_mapping->a_ops = &yaffs_file_address_operations;
+ break;
+ case S_IFDIR: // directory
+ inode->i_op = &yaffs_dir_inode_operations;
+ inode->i_fop = &yaffs_dir_operations;
+ break;
+ case S_IFLNK: // symlink
+ inode->i_op = &yaffs_symlink_inode_operations;
+ break;
+ }
+
+
+ inode->u.generic_ip = obj;
+ obj->myInode = inode;
+
+ }
+ else
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_FileInode invalid parameters\n"));
+ }
+
+}
+
+struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,yaffs_Object *obj)
+{
+ struct inode * inode;
+
+ if(!sb)
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for NULL super_block!!\n"));
+ return NULL;
+
+ }
+
+ if(!obj)
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for NULL object!!\n"));
+ return NULL;
+
+ }
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_get_inode for object %d\n",obj->objectId));
+
+ inode = iget(sb,obj->objectId);
+
+ // NB Side effect: iget calls back to yaffs_read_inode().
+ // iget also increments the inode's i_count
+
+ return inode;
+}
+
+#if 0
+
+// No longer used because we use generic rw */
+static ssize_t yaffs_file_read(struct file *f, char *buf, size_t n, loff_t *pos)
+{
+ yaffs_Object *obj;
+ int nRead,ipos;
+ struct inode *inode;
+ yaffs_Device *dev;
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read\n"));
+
+ obj = yaffs_DentryToObject(f->f_dentry);
+
+ dev = obj->myDev;
+
+ yaffs_GrossLock(dev);
+
+ inode = f->f_dentry->d_inode;
+
+ if (*pos < inode->i_size)
+ {
+ if (*pos + n > inode->i_size)
+ {
+ n = inode->i_size - *pos;
+ }
+ }
+ else
+ {
+ n = 0;
+ }
+
+ nRead = yaffs_ReadDataFromFile(obj,buf,*pos,n);
+ if(nRead > 0)
+ {
+ f->f_pos += nRead;
+ }
+
+ yaffs_GrossUnlock(dev);
+
+ ipos = *pos;
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_read read %d bytes, %d read at %d\n",n,nRead,ipos));
+ return nRead;
+
+}
+
+#endif
+
+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, loff_t *pos)
+{
+ yaffs_Object *obj;
+ int nWritten,ipos;
+ struct inode *inode;
+ yaffs_Device *dev;
+
+
+ obj = yaffs_DentryToObject(f->f_dentry);
+
+ dev = obj->myDev;
+
+ yaffs_GrossLock(dev);
+
+ inode = f->f_dentry->d_inode;
+
+ if(!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
+ {
+ ipos = inode->i_size;
+ }
+ else
+ {
+ ipos = *pos;
+ }
+
+
+ if(!obj)
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write: hey obj is null!\n"));
+ }
+ else
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write about to write writing %d bytes to object %d at %d\n",n,obj->objectId,ipos));
+ }
+
+ nWritten = yaffs_WriteDataToFile(obj,buf,ipos,n);
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write writing %d bytes, %d written at %d\n",n,nWritten,ipos));
+ if(nWritten > 0)
+ {
+ ipos += nWritten;
+ *pos = ipos;
+ if(ipos > inode->i_size)
+ {
+ inode->i_size = ipos;
+ inode->i_blocks = (ipos + 511)>>9;
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_file_write size updated to %d bytes, %d blocks\n",ipos,(int)(inode->i_blocks)));
+ }
+
+ }
+ yaffs_GrossUnlock(dev);
+
+ return nWritten != n ? -ENOSPC : nWritten;
+}
+
+
+
+static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
+{
+ yaffs_Object *obj;
+ yaffs_Device *dev;
+ struct inode *inode = f->f_dentry->d_inode;
+ unsigned long offset, curoffs;
+ struct list_head *i;
+ yaffs_Object *l;
+
+ char name[YAFFS_MAX_NAME_LENGTH +1];
+
+ obj = yaffs_DentryToObject(f->f_dentry);
+ dev = obj->myDev;
+
+ yaffs_GrossLock(dev);
+
+ offset = f->f_pos;
+
+ T(YAFFS_TRACE_OS,("yaffs_readdir: starting at %d\n",(int)offset));
+
+ if(offset == 0)
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry . ino %d \n",(int)inode->i_ino));
+ if(filldir(dirent,".",1,offset,inode->i_ino,DT_DIR) < 0)
+ {
+ goto out;
+ }
+ offset++;
+ f->f_pos++;
+ }
+ if(offset == 1)
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: entry .. ino %d \n",(int)f->f_dentry->d_parent->d_inode->i_ino));
+ if(filldir(dirent,"..",2,offset,f->f_dentry->d_parent->d_inode->i_ino,DT_DIR) < 0)
+ {
+ goto out;
+ }
+ offset++;
+ f->f_pos++;
+ }
+
+ curoffs = 1;
+
+ list_for_each(i,&obj->variant.directoryVariant.children)
+ {
+ curoffs++;
+ if(curoffs >= offset)
+ {
+ l = list_entry(i, yaffs_Object,siblings);
+
+ yaffs_GetObjectName(l,name,YAFFS_MAX_NAME_LENGTH+1);
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_readdir: %s inode %d\n",name,yaffs_GetObjectInode(l)));
+
+ if(filldir(dirent,
+ name,
+ strlen(name),
+ offset,
+ yaffs_GetObjectInode(l),
+ yaffs_GetObjectType(l))
+ < 0)
+ {
+ goto up_and_out;
+ }
+
+ offset++;
+ f->f_pos++;
+ }
+ }
+
+ up_and_out:
+ out:
+
+ yaffs_GrossUnlock(dev);
+
+ return 0;
+}
+
+
+/*
+ * File creation. Allocate an inode, and we're done..
+ */
+//#if defined(CONFIG_KERNEL_2_5)
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
+#else
+static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev)
+#endif
+{
+ struct inode *inode;
+
+ yaffs_Object *obj = NULL;
+ yaffs_Device *dev;
+
+ yaffs_Object *parent = yaffs_InodeToObject(dir);
+
+ int error = -ENOSPC;
+
+ if(parent)
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: parent object %d type %d\n",
+ parent->objectId,parent->variantType));
+ }
+ else
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: could not get parent object\n"));
+ return -EPERM;
+ }
+
+ T(YAFFS_TRACE_OS,("yaffs_mknod: making oject for %s, mode %x dev %x\n",
+ dentry->d_name.name, mode,rdev));
+
+ dev = parent->myDev;
+
+ yaffs_GrossLock(dev);
+
+ switch (mode & S_IFMT)
+ {
+ default:
+ // Special (socket, fifo, device...)
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making special\n"));
+ obj = yaffs_MknodSpecial(parent,dentry->d_name.name,mode,current->uid, current->gid,rdev);
+ break;
+ case S_IFREG: // file
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n"));
+ obj = yaffs_MknodFile(parent,dentry->d_name.name,mode,current->uid, current->gid);
+ break;
+ case S_IFDIR: // directory
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making directory\n"));
+ obj = yaffs_MknodDirectory(parent,dentry->d_name.name,mode,current->uid, current->gid);
+ break;
+ case S_IFLNK: // symlink
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod: making file\n"));
+ obj = NULL; // Do we ever get here?
+ break;
+ }
+
+ if(obj)
+ {
+ inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj);
+ d_instantiate(dentry, inode);
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod created object %d count = %d\n",obj->objectId,atomic_read(&inode->i_count)));
+ error = 0;
+ }
+ else
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mknod failed making object\n"));
+ error = -ENOMEM;
+ }
+
+ yaffs_GrossUnlock(dev);
+
+ return error;
+}
+
+static int yaffs_mkdir(struct inode * dir, struct dentry * dentry, int mode)
+{
+ int retVal;
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_mkdir\n"));
+ retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
+#if 0
+ // attempt to fix dir bug - didn't work
+ if(!retVal)
+ {
+ dget(dentry);
+ }
+#endif
+ return retVal;
+}
+
+//#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *n)
+#else
+static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode)
+#endif
+{
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_create\n"));
+ return yaffs_mknod(dir, dentry, mode | S_IFREG, 0);
+}
+
+
+static int yaffs_unlink(struct inode * dir, struct dentry *dentry)
+{
+ int retVal;
+
+ yaffs_Device *dev;
+
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_unlink %d:%s\n",(int)(dir->i_ino),dentry->d_name.name));
+
+ dev = yaffs_InodeToObject(dir)->myDev;
+
+ yaffs_GrossLock(dev);
+
+
+ retVal = yaffs_Unlink(yaffs_InodeToObject(dir),dentry->d_name.name);
+
+
+ yaffs_GrossUnlock(dev);
+
+ if( retVal == YAFFS_OK)
+ {
+ dentry->d_inode->i_nlink--;
+ mark_inode_dirty(dentry->d_inode);
+ return 0;
+ }
+ else
+ {
+ return -ENOTEMPTY;
+ }
+}
+
+
+/*
+ * Create a link...
+ */
+static int yaffs_link(struct dentry *old_dentry, struct inode * dir, struct dentry * dentry)
+{
+ struct inode *inode = old_dentry->d_inode;
+ yaffs_Object *obj = NULL;
+ yaffs_Object *link=NULL;
+ yaffs_Device *dev;
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link\n"));
+
+ obj = yaffs_InodeToObject(inode);
+ dev = obj->myDev;
+
+ yaffs_GrossLock(dev);
+
+ if (!S_ISDIR(inode->i_mode)) // Don't link directories
+ {
+ link = yaffs_Link(yaffs_InodeToObject(dir),dentry->d_name.name,obj);
+ }
+
+
+ if(link)
+ {
+ old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj);
+ d_instantiate(dentry, old_dentry->d_inode);
+ atomic_inc(&old_dentry->d_inode->i_count);
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_link link count %d i_count %d\n",
+ old_dentry->d_inode->i_nlink,atomic_read(&old_dentry->d_inode->i_count)));
+
+ }
+
+ yaffs_GrossUnlock(dev);
+
+
+ if(link)
+ {
+
+ return 0;
+ }
+
+
+ return -EPERM;
+}
+
+
+static int yaffs_symlink(struct inode * dir, struct dentry *dentry, const char * symname)
+{
+ yaffs_Object *obj;
+ yaffs_Device *dev;
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_symlink\n"));
+
+ dev = yaffs_InodeToObject(dir)->myDev;
+ yaffs_GrossLock(dev);
+ obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name,
+ S_IFLNK | S_IRWXUGO, current->uid, current->gid,
+ symname);
+ yaffs_GrossUnlock(dev);
+
+ if(obj)
+ {
+
+ struct inode* inode;
+
+ inode = yaffs_get_inode(dir->i_sb, obj->st_mode, 0, obj);
+ d_instantiate(dentry, inode);
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink created OK\n"));
+ return 0;
+ }
+ else
+ {
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"symlink not created\n"));
+
+ }
+
+ return -ENOMEM;
+}
+
+static int yaffs_sync_object(struct file * file, struct dentry *dentry, int datasync)
+{
+
+ yaffs_Object *obj;
+ yaffs_Device *dev;
+
+ obj = yaffs_DentryToObject(dentry);
+
+ dev = obj->myDev;
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_sync_object\n"));
+ yaffs_GrossLock(dev);
+ yaffs_FlushFile(obj,1);
+ yaffs_GrossUnlock(dev);
+ return 0;
+}
+
+/*
+ * The VFS layer already does all the dentry stuff for rename.
+ *
+ * NB: POSIX says you can rename an object over an old object of the same name
+ */
+static int yaffs_rename(struct inode * old_dir, struct dentry *old_dentry, struct inode * new_dir,struct dentry *new_dentry)
+{
+ yaffs_Device *dev;
+ int retVal = YAFFS_FAIL;
+ int removed = 0;
+ yaffs_Object *target;
+
+ dev = yaffs_InodeToObject(old_dir)->myDev;
+
+ yaffs_GrossLock(dev);
+
+ // Check if the target is an existing directory that is not empty.
+ target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
+
+ if(target &&
+ target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY &&
+ !list_empty(&target->variant.directoryVariant.children))
+ {
+ retVal = YAFFS_FAIL;
+ }
+ else
+ {
+
+ // Unlink the target if it exists
+ removed = yaffs_Unlink(yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
+
+
+ retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir),old_dentry->d_name.name,
+ yaffs_InodeToObject(new_dir),new_dentry->d_name.name);
+
+ }
+ yaffs_GrossUnlock(dev);
+
+ if(retVal == YAFFS_OK)
+ {
+ if(removed == YAFFS_OK)
+ {
+ new_dentry->d_inode->i_nlink--;
+ mark_inode_dirty(new_dentry->d_inode);
+ }
+
+ return 0;
+ }
+ else
+ {
+ return -ENOTEMPTY;
+ }
+
+
+}
+
+static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *inode = dentry->d_inode;
+ int error;
+ yaffs_Device *dev;
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_setattr of object %d\n",yaffs_InodeToObject(inode)->objectId));
+
+ if((error = inode_change_ok(inode,attr)) == 0)
+ {
+
+ dev = yaffs_InodeToObject(inode)->myDev;
+ yaffs_GrossLock(dev);
+ if(yaffs_SetAttributes(yaffs_InodeToObject(inode),attr) == YAFFS_OK)
+ {
+ error = 0;
+ }
+ else
+ {
+ error = -EPERM;
+ }
+ yaffs_GrossUnlock(dev);
+ inode_setattr(inode,attr);
+ }
+ return error;
+}
+
+//#if defined(CONFIG_KERNEL_2_5) /* Added NCB 185-8-2003 */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
+#else
+static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
+#endif
+{
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_statfs\n"));
+
+ yaffs_GrossLock(dev);
+
+ buf->f_type = YAFFS_MAGIC;
+ buf->f_bsize = sb->s_blocksize;
+ buf->f_namelen = 255;
+ buf->f_blocks = (dev->endBlock - dev->startBlock + 1) * YAFFS_CHUNKS_PER_BLOCK/
+ (sb->s_blocksize/YAFFS_BYTES_PER_CHUNK);
+ buf->f_files = 0;
+ buf->f_ffree = 0;
+ buf->f_bfree = yaffs_GetNumberOfFreeChunks(dev)/
+ (sb->s_blocksize/YAFFS_BYTES_PER_CHUNK);
+ buf->f_bavail = buf->f_bfree;
+
+ yaffs_GrossUnlock(dev);
+ return 0;
+}
+
+static void yaffs_read_inode (struct inode *inode)
+{
+ // NB This is called as a side effect of other functions and
+ // thus gross locking should always be in place already.
+
+ yaffs_Object *obj ;
+ yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb);
+
+ T(YAFFS_TRACE_OS,(KERN_DEBUG"yaffs_read_inode for %d\n",(int)inode->i_ino));
+
+ obj = yaffs_FindObjectByNumber(dev,inode->i_ino);
+
+ yaffs_FillInodeFromObject(inode,obj);
+
+}
+
+
+
+// Todo
+// Currently we only can report a single partition. Need to use lists here
+static yaffs_Device *yaffs_dev;
+static yaffs_Device *yaffsram_dev;
+
+
+
+static void yaffs_put_super(struct super_block *sb)
+{
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+
+ yaffs_GrossLock(dev);
+ if(dev->putSuperFunc)
+ {
+ dev->putSuperFunc(sb);
+ }
+ yaffs_Deinitialise(dev);
+ yaffs_GrossUnlock(dev);
+
+ if(dev == yaffs_dev) yaffs_dev = NULL;
+ if(dev == yaffsram_dev) yaffsram_dev = NULL;
+
+ kfree(dev);
+}
+
+
+#ifdef CONFIG_YAFFS_MTD_ENABLED
+
+static void yaffs_MTDPutSuper(struct super_block *sb)
+{
+
+ struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
+
+ if(mtd->sync)
+ {
+ mtd->sync(mtd);
+ }
+
+ put_mtd_device(mtd);
+}
+
+#endif
+
+
+static struct super_block *yaffs_internal_read_super(int yaffsVersion,int useRam, struct super_block * sb, void * data, int silent)
+{
+ int nBlocks;
+ struct inode * inode = NULL;
+ struct dentry * root;
+ yaffs_Device *dev;
+ int err;
+
+ sb->s_magic = YAFFS_MAGIC;
+ sb->s_op = &yaffs_super_ops;
+
+ if(!sb)
+ printk(KERN_INFO"yaffs: sb is NULL\n");
+ else if(!sb->s_dev)
+ printk(KERN_INFO"yaffs: sb->s_dev is NULL\n");
+ else if(! kdevname(sb->s_dev))
+ printk(KERN_INFO"yaffs: kdevname is NULL\n");
+ else
+ printk(KERN_INFO"yaffs: dev is %d name is \"%s\"\n", sb->s_dev, kdevname(sb->s_dev));
+
+
+
+#ifdef CONFIG_YAFFS_USE_CHUNK_SIZE
+ sb->s_blocksize = YAFFS_BYTES_PER_CHUNK;
+ sb->s_blocksize_bits = YAFFS_CHUNK_SIZE_SHIFT;
+#else
+ sb->s_blocksize = PAGE_CACHE_SIZE;
+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+#endif
+ T(YAFFS_TRACE_OS,("yaffs_read_super: Using yaffs%d\n",yaffsVersion));
+ T(YAFFS_TRACE_OS,("yaffs_read_super: %s block size %d\n", useRam ? "RAM" : "MTD",(int)(sb->s_blocksize)));
+
+#ifdef CONFIG_YAFFS_DISABLE_WRITE_VERIFY
+ T(YAFFS_TRACE_OS,("yaffs: Write verification disabled. All guarantees null and void\n"));
+#endif
+
+
+
+ if(useRam)
+ {
+
+#ifdef CONFIG_YAFFS_RAM_ENABLED
+ // Set the yaffs_Device up for ram emulation
+
+ sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
+ if(!dev)
+ {
+ // Deep shit could not allocate device structure
+ T(YAFFS_TRACE_OS,("yaffs_read_super: Failed trying to allocate yaffs_Device.\n"));
+ return NULL;
+ }
+
+ memset(dev,0,sizeof(yaffs_Device));
+ dev->genericDevice = NULL; // Not used for RAM emulation.
+
+ nBlocks = YAFFS_RAM_EMULATION_SIZE / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
+ dev->startBlock = 1; // Don't use block 0
+ dev->endBlock = nBlocks - 1;
+ dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
+ dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+ dev->nReservedBlocks = 5;
+
+ if(yaffsVersion == 2)
+ {
+ dev->writeChunkWithTagsToNAND = nandemul2k_WriteChunkWithTagsToNAND;
+ dev->readChunkWithTagsFromNAND = nandemul2k_ReadChunkWithTagsFromNAND;
+ dev->markNANDBlockBad = nandemul2k_MarkNANDBlockBad;
+ dev->queryNANDBlock = nandemul2k_QueryNANDBlock;
+ dev->eraseBlockInNAND = nandemul2k_EraseBlockInNAND;
+ dev->initialiseNAND = nandemul2k_InitialiseNAND;
+ dev->isYaffs2 = 1;
+ dev->nChunksPerBlock = nandemul2k_GetChunksPerBlock();
+ dev->nBytesPerChunk = nandemul2k_GetBytesPerChunk();;
+ nBlocks = nandemul2k_GetNumberOfBlocks();
+ dev->startBlock = 1; // Don't use block 0
+ dev->endBlock = nBlocks - 1;
+ }
+ else
+ {
+ dev->writeChunkToNAND = nandemul_WriteChunkToNAND;
+ dev->readChunkFromNAND = nandemul_ReadChunkFromNAND;
+ dev->eraseBlockInNAND = nandemul_EraseBlockInNAND;
+ dev->initialiseNAND = nandemul_InitialiseNAND;
+ dev->isYaffs2 = 0;
+ }
+
+ yaffsram_dev = dev;
+
+#endif
+
+ }
+ else
+ {
+#ifdef CONFIG_YAFFS_MTD_ENABLED
+ struct mtd_info *mtd;
+
+ T(YAFFS_TRACE_ALWAYS,("yaffs: Attempting MTD mount on %u.%u, \"%s\"\n",
+ MAJOR(sb->s_dev),MINOR(sb->s_dev),kdevname(sb->s_dev)));
+
+ // Check it's an mtd device.....
+ if(MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR)
+ {
+ return NULL; // This isn't an mtd device
+ }
+
+ // Get the device
+ mtd = get_mtd_device(NULL, MINOR(sb->s_dev));
+ if (!mtd)
+ {
+ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device #%u doesn't appear to exist\n", MINOR(sb->s_dev)));
+ return NULL;
+ }
+
+ // Check it's NAND
+ if(mtd->type != MTD_NANDFLASH)
+ {
+ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device is not NAND it's type %d\n", mtd->type));
+ return NULL;
+ }
+
+ T(YAFFS_TRACE_OS,(" erase %x\n",mtd->erase));
+ T(YAFFS_TRACE_OS,(" read %x\n",mtd->read));
+ T(YAFFS_TRACE_OS,(" write %x\n",mtd->write));
+ T(YAFFS_TRACE_OS,(" readoob %x\n",mtd->read_oob));
+ T(YAFFS_TRACE_OS,(" writeoob %x\n",mtd->write_oob));
+ T(YAFFS_TRACE_OS,(" block_isbad %x\n",mtd->block_isbad));
+ T(YAFFS_TRACE_OS,(" block_markbad %x\n",mtd->block_markbad));
+ T(YAFFS_TRACE_OS,(" oobblock %d\n",mtd->oobblock));
+ T(YAFFS_TRACE_OS,(" oobsize %d\n",mtd->oobsize));
+ T(YAFFS_TRACE_OS,(" erasesize %d\n",mtd->erasesize));
+ T(YAFFS_TRACE_OS,(" size %d\n",mtd->size));
+
+ if(yaffsVersion == 2)
+ {
+ // Check for version 2 style functions
+ if(!mtd->erase ||
+ !mtd->block_isbad ||
+ !mtd->block_markbad ||
+ !mtd->read ||
+ !mtd->write ||
+#ifndef CONFIG_YAFFS_USE_OLD_MTD
+ !mtd->write_ecc ||
+ !mtd->read_ecc ||
+#endif
+ !mtd->read_oob ||
+ !mtd->write_oob )
+ {
+ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
+ return NULL;
+ }
+
+ if(mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
+ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE)
+ {
+ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n"));
+ return NULL;
+ } }
+ else
+ {
+ // Check for V1 style functions
+ if(!mtd->erase ||
+ !mtd->read ||
+ !mtd->write ||
+#ifndef CONFIG_YAFFS_USE_OLD_MTD
+ !mtd->write_ecc ||
+ !mtd->read_ecc ||
+#endif
+ !mtd->read_oob ||
+ !mtd->write_oob )
+ {
+ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support required functions\n"));;
+ return NULL;
+ }
+
+ if(mtd->oobblock != YAFFS_BYTES_PER_CHUNK ||
+ mtd->oobsize != YAFFS_BYTES_PER_SPARE)
+ {
+ T(YAFFS_TRACE_ALWAYS,("yaffs: MTD device does not support have the right page sizes\n"));
+ return NULL;
+ }
+ }
+
+
+ // OK, so if we got here, we have an MTD that's NAND and looks
+ // like it has the right capabilities
+ // Set the yaffs_Device up for mtd
+
+//#if defined(CONFIG_KERNEL_2_5)
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ sb->s_fs_info = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
+#else
+ sb->u.generic_sbp = dev = kmalloc(sizeof(yaffs_Device),GFP_KERNEL);
+#endif
+ if(!dev)
+ {
+ // Deep shit could not allocate device structure
+ T(YAFFS_TRACE_ALWAYS,("yaffs_read_super: Failed trying to allocate yaffs_Device. \n"));
+ return NULL;
+ }
+
+ memset(dev,0,sizeof(yaffs_Device));
+ dev->genericDevice = mtd;
+
+ // Set up the memory size parameters....
+
+ nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
+ dev->startBlock = 1; // Don't use block 0
+ dev->endBlock = nBlocks - 1;
+ dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
+ dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+ dev->nReservedBlocks = 5;
+ dev->nShortOpCaches = 10; // Enable short op caching
+
+
+ // ... and the functions.
+ if(yaffsVersion == 2)
+ {
+ dev->writeChunkWithTagsToNAND = nandmtd2_WriteChunkWithTagsToNAND;
+ dev->readChunkWithTagsFromNAND = nandmtd2_ReadChunkWithTagsFromNAND;
+ dev->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
+ dev->queryNANDBlock = nandmtd2_QueryNANDBlock;
+ dev->spareBuffer = YMALLOC(mtd->oobsize);
+ dev->isYaffs2 = 1;
+ dev->nBytesPerChunk = mtd->oobblock;
+ dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
+ nBlocks = mtd->size / mtd->erasesize;
+ dev->startBlock = 1; // Don't use block 0
+ dev->endBlock = nBlocks - 1;
+ }
+ else
+ {
+ dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
+ dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
+ dev->isYaffs2 = 0;
+ }
+ // ... and common functions
+ dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
+ dev->initialiseNAND = nandmtd_InitialiseNAND;
+
+ dev->putSuperFunc = yaffs_MTDPutSuper;
+
+#ifdef CONFIG_YAFFS_USE_NANDECC
+ dev->useNANDECC = 1;
+#endif
+
+ yaffs_dev = dev;
+
+#endif
+ }
+
+ init_MUTEX(&dev->grossLock);
+
+
+ yaffs_GrossLock(dev);
+
+ err = yaffs_GutsInitialise(dev);
+
+ T(YAFFS_TRACE_OS,("yaffs_read_super: guts initialised %s\n", (err == YAFFS_OK) ? "OK" : "FAILED"));
+
+ // Create root inode
+ if(err == YAFFS_OK)
+ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,yaffs_Root(dev));
+
+ yaffs_GrossUnlock(dev);
+
+ if (!inode)
+ return NULL;
+
+// added NCB
+ inode->i_op = & yaffs_dir_inode_operations;
+ inode->i_fop = & yaffs_dir_operations;
+
+ T(YAFFS_TRACE_OS,("yaffs_read_super: got root inode\n"));
+
+
+ root = d_alloc_root(inode);
+
+ T(YAFFS_TRACE_OS,("yaffs_read_super: d_alloc_root done\n"));
+
+ if (!root) {
+ iput(inode);
+ return NULL;
+ }
+ sb->s_root = root;
+
+ T(YAFFS_TRACE_OS,("yaffs_read_super: done\n"));
+ return sb;
+}
+
+
+static int yaffs_internal_read_super_ram(struct super_block * sb, void * data, int silent)
+{
+ return yaffs_internal_read_super(1,1,sb,data,silent) ? 0 : -1;
+}
+static int yaffs_internal_read_super_mtd(struct super_block * sb, void * data, int silent)
+{
+ return yaffs_internal_read_super(1,0,sb,data,silent) ? 0 : -1;
+}
+
+static int yaffs2_internal_read_super_ram(struct super_block * sb, void * data, int silent)
+{
+ return yaffs_internal_read_super(2,1,sb,data,silent) ? 0 : -1;
+}
+static int yaffs2_internal_read_super_mtd(struct super_block * sb, void * data, int silent)
+{
+ return yaffs_internal_read_super(2,0,sb,data,silent) ? 0 : -1;
+}
+
+
+
+#ifdef CONFIG_YAFFS_MTD_ENABLED
+//#if defined(CONFIG_KERNEL_2_5)
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static struct super_block *yaffs_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
+{
+
+ return get_sb_bdev(fs, flags, dev_name, data, yaffs_internal_read_super_mtd);
+}
+
+/* changes NCB 2.5.70 */
+//static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
+static struct file_system_type yaffs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "yaffs",
+ .get_sb = yaffs_read_super,
+// .kill_sb = kill_block_super,
+ .kill_sb = kill_litter_super,
+ .fs_flags = FS_REQUIRES_DEV,
+};
+#else
+static struct super_block *yaffs_read_super(struct super_block * sb, void * data, int silent)
+{
+ return yaffs_internal_read_super(1,0,sb,data,silent);
+}
+
+static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
+#endif
+
+#endif // CONFIG_YAFFS_MTD_ENABLED
+
+#ifdef CONFIG_YAFFS2_MTD_ENABLED
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static struct super_block *yaffs2_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
+{
+
+ return get_sb_bdev(fs, flags, dev_name, data, yaffs2_internal_read_super_mtd);
+}
+
+/* changes NCB 2.5.70 */
+//static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, FS_REQUIRES_DEV);
+static struct file_system_type yaffs2_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "yaffs2",
+ .get_sb = yaffs2_read_super,
+// .kill_sb = kill_block_super,
+ .kill_sb = kill_litter_super,
+ .fs_flags = FS_REQUIRES_DEV,
+};
+#else
+static struct super_block *yaffs2_read_super(struct super_block * sb, void * data, int silent)
+{
+ return yaffs_internal_read_super(2,0,sb,data,silent);
+}
+
+static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super, FS_REQUIRES_DEV);
+#endif
+
+#endif // CONFIG_YAFFS2_MTD_ENABLED
+
+
+#ifdef CONFIG_YAFFS_RAM_ENABLED
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static struct super_block *yaffs_ram_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
+{
+
+ return get_sb_bdev(fs, flags, dev_name, data, yaffs_internal_read_super_ram);
+}
+
+
+static struct file_system_type yaffs_ram_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "yaffsram",
+ .get_sb = yaffs_ram_read_super,
+// .kill_sb = kill_block_super,
+ .kill_sb = kill_litter_super,
+ .fs_flags = FS_SINGLE,
+};
+#else
+static struct super_block *yaffs_ram_read_super(struct super_block * sb, void * data, int silent)
+{
+ return yaffs_internal_read_super(1,1,sb,data,silent);
+}
+
+static DECLARE_FSTYPE(yaffs_ram_fs_type, "yaffsram", yaffs_ram_read_super, FS_SINGLE);
+#endif
+
+#endif // CONFIG_YAFFS_RAM_ENABLED
+
+#ifdef CONFIG_YAFFS2_RAM_ENABLED
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static struct super_block *yaffs2_ram_read_super(struct file_system_type * fs, int flags, const char *dev_name, void *data)
+{
+
+ return get_sb_bdev(fs, flags, dev_name, data, yaffs2_internal_read_super_ram);
+}
+
+
+static struct file_system_type yaffs2_ram_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "yaffs2ram",
+ .get_sb = yaffs2_ram_read_super,
+// .kill_sb = kill_block_super,
+ .kill_sb = kill_litter_super,
+ .fs_flags = FS_SINGLE,
+};
+#else
+static struct super_block *yaffs2_ram_read_super(struct super_block * sb, void * data, int silent)
+{
+ return yaffs_internal_read_super(2,1,sb,data,silent);
+}
+
+static DECLARE_FSTYPE(yaffs2_ram_fs_type, "yaffs2ram", yaffs2_ram_read_super, FS_SINGLE);
+#endif
+
+#endif // CONFIG_YAFFS2_RAM_ENABLED
+
+
+
+static struct proc_dir_entry *my_proc_entry;
+static struct proc_dir_entry *my_proc_ram_write_entry;
+
+static char * yaffs_dump_dev(char *buf,yaffs_Device *dev,char *name)
+{
+ buf +=sprintf(buf,"\nDevice %s\n",name);
+ buf +=sprintf(buf,"startBlock......... %d\n",dev->startBlock);
+ buf +=sprintf(buf,"endBlock........... %d\n",dev->endBlock);
+ buf +=sprintf(buf,"chunkGroupBits..... %d\n",dev->chunkGroupBits);
+ buf +=sprintf(buf,"chunkGroupSize..... %d\n",dev->chunkGroupSize);
+ buf +=sprintf(buf,"nErasedBlocks...... %d\n",dev->nErasedBlocks);
+ buf +=sprintf(buf,"nTnodesCreated..... %d\n",dev->nTnodesCreated);
+ buf +=sprintf(buf,"nFreeTnodes........ %d\n",dev->nFreeTnodes);
+ buf +=sprintf(buf,"nObjectsCreated.... %d\n",dev->nObjectsCreated);
+ buf +=sprintf(buf,"nFreeObjects....... %d\n",dev->nFreeObjects);
+ buf +=sprintf(buf,"nFreeChunks........ %d\n",dev->nFreeChunks);
+ buf +=sprintf(buf,"nPageWrites........ %d\n",dev->nPageWrites);
+ buf +=sprintf(buf,"nPageReads......... %d\n",dev->nPageReads);
+ buf +=sprintf(buf,"nBlockErasures..... %d\n",dev->nBlockErasures);
+ buf +=sprintf(buf,"nGCCopies.......... %d\n",dev->nGCCopies);
+ buf +=sprintf(buf,"garbageCollections. %d\n",dev->garbageCollections);
+ buf +=sprintf(buf,"passiveGCs......... %d\n",dev->passiveGarbageCollections);
+ buf +=sprintf(buf,"nRetriedWrites..... %d\n",dev->nRetriedWrites);
+ buf +=sprintf(buf,"nRetireBlocks...... %d\n",dev->nRetiredBlocks);
+ buf +=sprintf(buf,"eccFixed........... %d\n",dev->eccFixed);
+ buf +=sprintf(buf,"eccUnfixed......... %d\n",dev->eccUnfixed);
+ buf +=sprintf(buf,"tagsEccFixed....... %d\n",dev->tagsEccFixed);
+ buf +=sprintf(buf,"tagsEccUnfixed..... %d\n",dev->tagsEccUnfixed);
+ buf +=sprintf(buf,"cacheHits.......... %d\n",dev->cacheHits);
+ buf +=sprintf(buf,"nDeletedFiles...... %d\n",dev->nDeletedFiles);
+ buf +=sprintf(buf,"nUnlinkedFiles..... %d\n",dev->nUnlinkedFiles);
+ buf +=sprintf(buf,"nBackgroudDeletions %d\n",dev->nBackgroundDeletions);
+ buf +=sprintf(buf,"useNANDECC......... %d\n",dev->useNANDECC);
+ buf +=sprintf(buf,"isYaffs2........... %d\n",dev->isYaffs2);
+
+
+ return buf;
+}
+
+static int yaffs_proc_read(
+ char *page,
+ char **start,
+ off_t offset,
+ int count,
+ int *eof,
+ void *data
+ )
+{
+
+ char my_buffer[3000];
+ char *buf;
+ buf = my_buffer;
+
+ if (offset > 0) return 0;
+
+ /* Fill the buffer and get its length */
+ buf +=sprintf(buf,"YAFFS built:"__DATE__ " "__TIME__"\n%s\n%s\n", yaffs_fs_c_version,yaffs_guts_c_version);
+
+ if(yaffs_dev) buf = yaffs_dump_dev(buf,yaffs_dev,"yaffs");
+ if(yaffsram_dev) buf = yaffs_dump_dev(buf,yaffsram_dev,"yaffsram");
+
+
+ strcpy(page,my_buffer);
+ return strlen(my_buffer);
+}
+
+
+static int yaffs_proc_ram_write(
+ char *page,
+ char **start,
+ off_t offset,
+ int count,
+ int *eof,
+ void *data
+ )
+{
+
+ printk(KERN_DEBUG "yaffs write size %d\n",count);
+ return count;
+}
+
+
+
+// Stuff to handle installation of file systems
+struct file_system_to_install
+{
+ struct file_system_type *fst;
+ int installed;
+};
+
+static struct file_system_to_install fs_to_install[] =
+{
+#ifdef CONFIG_YAFFS_RAM_ENABLED
+ { &yaffs_ram_fs_type, 0},
+#endif
+#ifdef CONFIG_YAFFS2_RAM_ENABLED
+ { &yaffs2_ram_fs_type,0},
+#endif
+#ifdef CONFIG_YAFFS_MTD_ENABLED
+ { &yaffs_fs_type,0},
+#endif
+#ifdef CONFIG_YAFFS2_MTD_ENABLED
+ { &yaffs2_fs_type,0},
+#endif
+ { NULL,0}
+};
+
+static int __init init_yaffs_fs(void)
+{
+ int error = 0;
+ struct file_system_to_install *fsinst;
+
+ yaffs_dev = yaffsram_dev = NULL;
+
+ T(YAFFS_TRACE_ALWAYS,("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
+
+
+
+ /* Install the proc_fs entry */
+ my_proc_entry = create_proc_read_entry("yaffs",
+ S_IRUGO | S_IFREG,
+ &proc_root,
+ yaffs_proc_read,
+ NULL);
+ if(!my_proc_entry)
+ {
+ return -ENOMEM;
+ }
+
+
+
+ // Now add the file system entries
+
+ fsinst = fs_to_install;
+
+ while(fsinst->fst && !error)
+ {
+ error = register_filesystem(fsinst->fst);
+ if(!error)
+ {
+ fsinst->installed = 1;
+ }
+ fsinst++;
+ }
+
+ // Any errors? uninstall
+ if(error)
+ {
+ fsinst = fs_to_install;
+
+ while(fsinst->fst)
+ {
+ if(fsinst->installed)
+ {
+ unregister_filesystem(fsinst->fst);
+ fsinst->installed = 0;
+ }
+ fsinst++;
+ }
+ }
+
+ return error;
+}
+
+static void __exit exit_yaffs_fs(void)
+{
+
+ struct file_system_to_install *fsinst;
+
+ T(YAFFS_TRACE_ALWAYS,("yaffs " __DATE__ " " __TIME__ " removing. \n"));
+
+ remove_proc_entry("yaffs",&proc_root);
+
+ fsinst = fs_to_install;
+
+ while(fsinst->fst)
+ {
+ if(fsinst->installed)
+ {
+ unregister_filesystem(fsinst->fst);
+ fsinst->installed = 0;
+ }
+ fsinst++;
+ }
+
+}
+
+module_init(init_yaffs_fs)
+module_exit(exit_yaffs_fs)
+
+MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system");
+MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002,2003,2004");
+MODULE_LICENSE("GPL");
+
projects / yaffs2.git / commitdiff