--- /dev/null
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ * 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 JFFS
+ *
+ * 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:
+ * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
+ * this superblock
+ * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
+ * superblock
+ * >> inode->u.generic_ip points to the associated yaffs_Object.
+ */
+
+const char *yaffs_fs_c_version =
+ "$Id: yaffs_fs.c,v 1.63 2007-09-19 20:35:40 imcd Exp $";
+extern const char *yaffs_guts_c_version;
+
+#include <linux/version.h>
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
+#include <linux/config.h>
+#endif
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/fs.h>
+#include <linux/proc_fs.h>
+#include <linux/smp_lock.h>
+#include <linux/pagemap.h>
+#include <linux/mtd/mtd.h>
+#include <linux/interrupt.h>
+#include <linux/string.h>
+#include <linux/ctype.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)
+
+/* FIXME: use sb->s_id instead ? */
+#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
+
+#else
+
+#include <linux/locks.h>
+#define BDEVNAME_SIZE 0
+#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
+#define __user
+#endif
+
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+#define WRITE_SIZE_STR "writesize"
+#define WRITE_SIZE(mtd) (mtd)->writesize
+#else
+#define WRITE_SIZE_STR "oobblock"
+#define WRITE_SIZE(mtd) (mtd)->oobblock
+#endif
+
+#include <asm/uaccess.h>
+
+#include "yportenv.h"
+#include "yaffs_guts.h"
+
+#include <linux/mtd/mtd.h>
+#include "yaffs_mtdif.h"
+#include "yaffs_mtdif1.h"
+#include "yaffs_mtdif2.h"
+
+unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
+unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
+
+/* Module Parameters */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+module_param(yaffs_traceMask,uint,0644);
+module_param(yaffs_wr_attempts,uint,0644);
+#else
+MODULE_PARM(yaffs_traceMask,"i");
+MODULE_PARM(yaffs_wr_attempts,"i");
+#endif
+
+/*#define T(x) printk x */
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
+#define yaffs_InodeToObjectLV(iptr) (iptr)->i_private
+#else
+#define yaffs_InodeToObjectLV(iptr) (iptr)->u.generic_ip
+#endif
+
+#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
+#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
+
+#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);
+
+static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
+ loff_t * pos);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+static int yaffs_file_flush(struct file *file, fl_owner_t id);
+#else
+static int yaffs_file_flush(struct file *file);
+#endif
+
+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 (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 (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 (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+static int yaffs_sync_fs(struct super_block *sb, int wait);
+static void yaffs_write_super(struct super_block *sb);
+#else
+static int yaffs_sync_fs(struct super_block *sb);
+static int yaffs_write_super(struct super_block *sb);
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
+#elif (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);
+
+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);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
+#else
+static int yaffs_writepage(struct page *page);
+#endif
+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 __user * buffer,
+ int buflen);
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+#else
+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
+#endif
+
+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,
+};
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22))
+static struct file_operations yaffs_file_operations = {
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = generic_file_aio_write,
+ .mmap = generic_file_mmap,
+ .flush = yaffs_file_flush,
+ .fsync = yaffs_sync_object,
+ .splice_read = generic_file_splice_read,
+ .splice_write = generic_file_splice_write,
+};
+
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
+
+static struct file_operations yaffs_file_operations = {
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = generic_file_aio_write,
+ .mmap = generic_file_mmap,
+ .flush = yaffs_file_flush,
+ .fsync = yaffs_sync_object,
+ .sendfile = generic_file_sendfile,
+};
+
+#else
+
+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,
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ .sendfile = generic_file_sendfile,
+#endif
+};
+#endif
+
+static struct inode_operations yaffs_file_inode_operations = {
+ .setattr = yaffs_setattr,
+};
+
+static 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,
+ .delete_inode = yaffs_delete_inode,
+ .clear_inode = yaffs_clear_inode,
+ .sync_fs = yaffs_sync_fs,
+ .write_super = yaffs_write_super,
+};
+
+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 __user * 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;
+}
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
+static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+#else
+static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
+#endif
+{
+ 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)
+ {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = vfs_follow_link(nd, alias);
+ kfree(alias);
+out:
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
+ return ERR_PTR (ret);
+#else
+ return ret;
+#endif
+}
+
+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 (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 */
+
+ /* Can't hold gross lock when calling yaffs_get_inode() */
+ yaffs_GrossUnlock(dev);
+
+ if (obj) {
+ T(YAFFS_TRACE_OS,
+ (KERN_DEBUG "yaffs_lookup found %d\n", obj->objectId));
+
+ inode = yaffs_get_inode(dir->i_sb, obj->yst_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);
+
+ /* return dentry; */
+ return NULL;
+#endif
+ }
+
+ } else {
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_lookup not found\n"));
+
+ }
+
+/* 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 and
+ * the yaffs_Object.
+ */
+ obj->myInode = NULL;
+ yaffs_InodeToObjectLV(inode) = 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);
+ }
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
+ truncate_inode_pages (&inode->i_data, 0);
+#endif
+ clear_inode(inode);
+}
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+static int yaffs_file_flush(struct file *file, fl_owner_t id)
+#else
+static int yaffs_file_flush(struct file *file)
+#endif
+{
+ 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 (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ BUG_ON(!PageLocked(pg));
+#else
+ if (!PageLocked(pg))
+ PAGE_BUG(pg);
+#endif
+
+ 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 */
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static int yaffs_writepage(struct page *page, struct writeback_control *wbc)
+#else
+static int yaffs_writepage(struct page *page)
+#endif
+{
+ struct address_space *mapping = page->mapping;
+ loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
+ 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();
+
+ if (offset > inode->i_size) {
+ T(YAFFS_TRACE_OS,
+ (KERN_DEBUG
+ "yaffs_writepage at %08x, inode size = %08x!!!\n",
+ (unsigned)(page->index << PAGE_CACHE_SHIFT),
+ (unsigned)inode->i_size));
+ T(YAFFS_TRACE_OS,
+ (KERN_DEBUG " -> don't care!!\n"));
+ unlock_page(page);
+ return 0;
+ }
+
+ 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);
+ }
+
+ get_page(page);
+
+ buffer = kmap(page);
+
+ obj = yaffs_InodeToObject(inode);
+ yaffs_GrossLock(obj->myDev);
+
+ T(YAFFS_TRACE_OS,
+ (KERN_DEBUG "yaffs_writepage at %08x, size %08x\n",
+ (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
+ T(YAFFS_TRACE_OS,
+ (KERN_DEBUG "writepag0: obj = %05x, ino = %05x\n",
+ (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
+
+ nWritten =
+ yaffs_WriteDataToFile(obj, buffer, page->index << PAGE_CACHE_SHIFT,
+ nBytes, 0);
+
+ T(YAFFS_TRACE_OS,
+ (KERN_DEBUG "writepag1: obj = %05x, ino = %05x\n",
+ (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
+
+ 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 == nBytes ? 0 : nWritten));
+
+ return nWritten == nBytes ? 0 : nWritten;
+
+}
+
+static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
+{
+ if (inode && obj) {
+
+
+ /* Check mode against the variant type and attempt to repair if broken. */
+ __u32 mode = obj->yst_mode;
+ switch( obj->variantType ){
+ case YAFFS_OBJECT_TYPE_FILE :
+ if( ! S_ISREG(mode) ){
+ obj->yst_mode &= ~S_IFMT;
+ obj->yst_mode |= S_IFREG;
+ }
+
+ break;
+ case YAFFS_OBJECT_TYPE_SYMLINK :
+ if( ! S_ISLNK(mode) ){
+ obj->yst_mode &= ~S_IFMT;
+ obj->yst_mode |= S_IFLNK;
+ }
+
+ break;
+ case YAFFS_OBJECT_TYPE_DIRECTORY :
+ if( ! S_ISDIR(mode) ){
+ obj->yst_mode &= ~S_IFMT;
+ obj->yst_mode |= S_IFDIR;
+ }
+
+ break;
+ case YAFFS_OBJECT_TYPE_UNKNOWN :
+ case YAFFS_OBJECT_TYPE_HARDLINK :
+ case YAFFS_OBJECT_TYPE_SPECIAL :
+ default:
+ /* TODO? */
+ break;
+ }
+
+ inode->i_ino = obj->objectId;
+ inode->i_mode = obj->yst_mode;
+ inode->i_uid = obj->yst_uid;
+ inode->i_gid = obj->yst_gid;
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
+ inode->i_blksize = inode->i_sb->s_blocksize;
+#endif
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+
+ inode->i_rdev = old_decode_dev(obj->yst_rdev);
+ inode->i_atime.tv_sec = (time_t) (obj->yst_atime);
+ inode->i_atime.tv_nsec = 0;
+ inode->i_mtime.tv_sec = (time_t) obj->yst_mtime;
+ inode->i_mtime.tv_nsec = 0;
+ inode->i_ctime.tv_sec = (time_t) obj->yst_ctime;
+ inode->i_ctime.tv_nsec = 0;
+#else
+ inode->i_rdev = obj->yst_rdev;
+ inode->i_atime = obj->yst_atime;
+ inode->i_mtime = obj->yst_mtime;
+ inode->i_ctime = obj->yst_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->yst_mode & S_IFMT) {
+ default: /* fifo, device or socket */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ init_special_inode(inode, obj->yst_mode,
+ old_decode_dev(obj->yst_rdev));
+#else
+ init_special_inode(inode, obj->yst_mode,
+ (dev_t) (obj->yst_rdev));
+#endif
+ 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;
+ }
+
+ yaffs_InodeToObjectLV(inode) = 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 */
+ /* NB You can't be holding grossLock or deadlock will happen! */
+
+ return inode;
+}
+
+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, 0);
+
+ 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 == 0 ? -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;
+
+ /* If the directory has changed since the open or last call to
+ readdir, rewind to after the 2 canned entries. */
+
+ if (f->f_version != inode->i_version) {
+ offset = 2;
+ f->f_pos = offset;
+ f->f_version = inode->i_version;
+ }
+
+ 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 (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;
+ uid_t uid = current->fsuid;
+ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
+
+ if((dir->i_mode & S_ISGID) && S_ISDIR(mode))
+ mode |= S_ISGID;
+
+ 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"));
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ obj =
+ yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
+ gid, old_encode_dev(rdev));
+#else
+ obj =
+ yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid,
+ gid, rdev);
+#endif
+ 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, uid,
+ 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,
+ uid, 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;
+ }
+
+ /* Can not call yaffs_get_inode() with gross lock held */
+ yaffs_GrossUnlock(dev);
+
+ 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;
+ }
+
+ 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 (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);
+
+ if (retVal == YAFFS_OK) {
+ dentry->d_inode->i_nlink--;
+ dir->i_version++;
+ yaffs_GrossUnlock(dev);
+ mark_inode_dirty(dentry->d_inode);
+ return 0;
+ }
+ yaffs_GrossUnlock(dev);
+ 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;
+ uid_t uid = current->fsuid;
+ gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : current->fsgid;
+
+ 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, uid, gid, symname);
+ yaffs_GrossUnlock(dev);
+
+ if (obj) {
+
+ struct inode *inode;
+
+ inode = yaffs_get_inode(dir->i_sb, obj->yst_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;
+ yaffs_Object *target;
+
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_rename\n"));
+ 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)) {
+
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "target is non-empty dir\n"));
+
+ retVal = YAFFS_FAIL;
+ } else {
+
+ /* Now does unlinking internally using shadowing mechanism */
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "calling yaffs_RenameObject\n"));
+
+ 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(target) {
+ 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);
+ if (!error)
+ error = inode_setattr(inode, attr);
+ }
+ return error;
+}
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
+ struct super_block *sb = dentry->d_sb;
+#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf)
+{
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+#else
+static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
+{
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+#endif
+
+ 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;
+ if (sb->s_blocksize > dev->nDataBytesPerChunk) {
+
+ buf->f_blocks =
+ (dev->endBlock - dev->startBlock +
+ 1) * dev->nChunksPerBlock / (sb->s_blocksize /
+ dev->nDataBytesPerChunk);
+ buf->f_bfree =
+ yaffs_GetNumberOfFreeChunks(dev) / (sb->s_blocksize /
+ dev->nDataBytesPerChunk);
+ } else {
+
+ buf->f_blocks =
+ (dev->endBlock - dev->startBlock +
+ 1) * dev->nChunksPerBlock * (dev->nDataBytesPerChunk /
+ sb->s_blocksize);
+ buf->f_bfree =
+ yaffs_GetNumberOfFreeChunks(dev) * (dev->nDataBytesPerChunk /
+ sb->s_blocksize);
+ }
+ buf->f_files = 0;
+ buf->f_ffree = 0;
+ buf->f_bavail = buf->f_bfree;
+
+ yaffs_GrossUnlock(dev);
+ return 0;
+}
+
+
+/**
+static int yaffs_do_sync_fs(struct super_block *sb)
+{
+
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_do_sync_fs\n"));
+
+ if(sb->s_dirt) {
+ yaffs_GrossLock(dev);
+
+ if(dev)
+ yaffs_CheckpointSave(dev);
+
+ yaffs_GrossUnlock(dev);
+
+ sb->s_dirt = 0;
+ }
+ return 0;
+}
+**/
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+static void yaffs_write_super(struct super_block *sb)
+#else
+static int yaffs_write_super(struct super_block *sb)
+#endif
+{
+
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_super\n"));
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18))
+ return 0; /* yaffs_do_sync_fs(sb);*/
+#endif
+}
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+static int yaffs_sync_fs(struct super_block *sb, int wait)
+#else
+static int yaffs_sync_fs(struct super_block *sb)
+#endif
+{
+
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_sync_fs\n"));
+
+ return 0; /* yaffs_do_sync_fs(sb);*/
+
+}
+
+
+static void yaffs_read_inode(struct inode *inode)
+{
+ /* NB This is called as a side effect of other functions, but
+ * we had to release the lock to prevent deadlocks, so
+ * need to lock again.
+ */
+
+ 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));
+
+ yaffs_GrossLock(dev);
+
+ obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
+
+ yaffs_FillInodeFromObject(inode, obj);
+
+ yaffs_GrossUnlock(dev);
+}
+
+static LIST_HEAD(yaffs_dev_list);
+
+#if 0 // not used
+static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data)
+{
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+
+ if( *flags & MS_RDONLY ) {
+ struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice;
+
+ T(YAFFS_TRACE_OS,
+ (KERN_DEBUG "yaffs_remount_fs: %s: RO\n", dev->name ));
+
+ yaffs_GrossLock(dev);
+
+ yaffs_FlushEntireDeviceCache(dev);
+
+ yaffs_CheckpointSave(dev);
+
+ if (mtd->sync)
+ mtd->sync(mtd);
+
+ yaffs_GrossUnlock(dev);
+ }
+ else {
+ T(YAFFS_TRACE_OS,
+ (KERN_DEBUG "yaffs_remount_fs: %s: RW\n", dev->name ));
+ }
+
+ return 0;
+}
+#endif
+
+static void yaffs_put_super(struct super_block *sb)
+{
+ yaffs_Device *dev = yaffs_SuperToDevice(sb);
+
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_put_super\n"));
+
+ yaffs_GrossLock(dev);
+
+ yaffs_FlushEntireDeviceCache(dev);
+
+ yaffs_CheckpointSave(dev);
+
+ if (dev->putSuperFunc) {
+ dev->putSuperFunc(sb);
+ }
+
+ yaffs_Deinitialise(dev);
+
+ yaffs_GrossUnlock(dev);
+
+ /* we assume this is protected by lock_kernel() in mount/umount */
+ list_del(&dev->devList);
+
+ if(dev->spareBuffer){
+ YFREE(dev->spareBuffer);
+ dev->spareBuffer = NULL;
+ }
+
+ kfree(dev);
+}
+
+
+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);
+}
+
+
+static void yaffs_MarkSuperBlockDirty(void *vsb)
+{
+ struct super_block *sb = (struct super_block *)vsb;
+
+ T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_MarkSuperBlockDirty() sb = %p\n",sb));
+// if(sb)
+// sb->s_dirt = 1;
+}
+
+typedef struct {
+ int inband_tags;
+ int skip_checkpoint_read;
+ int skip_checkpoint_write;
+ int no_cache;
+} yaffs_options;
+
+#define MAX_OPT_LEN 20
+static int yaffs_parse_options(yaffs_options *options, const char *options_str)
+{
+ char cur_opt[MAX_OPT_LEN+1];
+ int p;
+ int error = 0;
+
+ /* Parse through the options which is a comma seperated list */
+
+ while(options_str && *options_str && !error){
+ memset(cur_opt,0,MAX_OPT_LEN+1);
+ p = 0;
+
+ while(*options_str && *options_str != ','){
+ if(p < MAX_OPT_LEN){
+ cur_opt[p] = *options_str;
+ p++;
+ }
+ options_str++;
+ }
+
+ if(!strcmp(cur_opt,"inband-tags"))
+ options->inband_tags = 1;
+ else if(!strcmp(cur_opt,"no-cache"))
+ options->no_cache = 1;
+ else if(!strcmp(cur_opt,"no-checkpoint-read"))
+ options->skip_checkpoint_read = 1;
+ else if(!strcmp(cur_opt,"no-checkpoint-write"))
+ options->skip_checkpoint_write = 1;
+ else if(!strcmp(cur_opt,"no-checkpoint")){
+ options->skip_checkpoint_read = 1;
+ options->skip_checkpoint_write = 1;
+ } else {
+ printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n",cur_opt);
+ error = 1;
+ }
+
+ }
+
+ return error;
+}
+
+static struct super_block *yaffs_internal_read_super(int yaffsVersion,
+ struct super_block *sb,
+ void *data, int silent)
+{
+ int nBlocks;
+ struct inode *inode = NULL;
+ struct dentry *root;
+ yaffs_Device *dev = 0;
+ char devname_buf[BDEVNAME_SIZE + 1];
+ struct mtd_info *mtd;
+ int err;
+ char *data_str = (char *)data;
+
+ yaffs_options options;
+
+ 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 (!yaffs_devname(sb, devname_buf))
+ printk(KERN_INFO "yaffs: devname is NULL\n");
+ else
+ printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n",
+ sb->s_dev,
+ yaffs_devname(sb, devname_buf));
+
+ if(!data_str)
+ data_str = "";
+
+ printk(KERN_INFO "yaffs: passed flags \"%s\"\n",data_str);
+
+ memset(&options,0,sizeof(options));
+
+ if(yaffs_parse_options(&options,data_str)){
+ /* Option parsing failed */
+ return NULL;
+ }
+
+
+ sb->s_blocksize = PAGE_CACHE_SIZE;
+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+ T(YAFFS_TRACE_OS, ("yaffs_read_super: Using yaffs%d\n", yaffsVersion));
+ T(YAFFS_TRACE_OS,
+ ("yaffs_read_super: block size %d\n", (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
+
+ T(YAFFS_TRACE_ALWAYS, ("yaffs: Attempting MTD mount on %u.%u, "
+ "\"%s\"\n",
+ MAJOR(sb->s_dev), MINOR(sb->s_dev),
+ yaffs_devname(sb, devname_buf)));
+
+ /* 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 %p\n", mtd->erase));
+ T(YAFFS_TRACE_OS, (" read %p\n", mtd->read));
+ T(YAFFS_TRACE_OS, (" write %p\n", mtd->write));
+ T(YAFFS_TRACE_OS, (" readoob %p\n", mtd->read_oob));
+ T(YAFFS_TRACE_OS, (" writeoob %p\n", mtd->write_oob));
+ T(YAFFS_TRACE_OS, (" block_isbad %p\n", mtd->block_isbad));
+ T(YAFFS_TRACE_OS, (" block_markbad %p\n", mtd->block_markbad));
+ T(YAFFS_TRACE_OS, (" %s %d\n", WRITE_SIZE_STR, WRITE_SIZE(mtd)));
+ 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));
+
+#ifdef CONFIG_YAFFS_AUTO_YAFFS2
+
+ if (yaffsVersion == 1 &&
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+ mtd->writesize >= 2048) {
+#else
+ mtd->oobblock >= 2048) {
+#endif
+ T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs2\n"));
+ yaffsVersion = 2;
+ }
+
+ /* Added NCB 26/5/2006 for completeness */
+ if (yaffsVersion == 2 &&
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+ mtd->writesize == 512) {
+#else
+ mtd->oobblock == 512) {
+#endif
+ T(YAFFS_TRACE_ALWAYS,("yaffs: auto selecting yaffs1\n"));
+ yaffsVersion = 1;
+ }
+
+#endif
+
+ if (yaffsVersion == 2) {
+ /* Check for version 2 style functions */
+ if (!mtd->erase ||
+ !mtd->block_isbad ||
+ !mtd->block_markbad ||
+ !mtd->read ||
+ !mtd->write ||
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+ !mtd->read_oob || !mtd->write_oob) {
+#else
+ !mtd->write_ecc ||
+ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
+#endif
+ T(YAFFS_TRACE_ALWAYS,
+ ("yaffs: MTD device does not support required "
+ "functions\n"));;
+ return NULL;
+ }
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+ if (mtd->writesize < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
+#else
+ if (mtd->oobblock < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
+#endif
+ mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) {
+ T(YAFFS_TRACE_ALWAYS,
+ ("yaffs: MTD device does not have the "
+ "right page sizes\n"));
+ return NULL;
+ }
+ } else {
+ /* Check for V1 style functions */
+ if (!mtd->erase ||
+ !mtd->read ||
+ !mtd->write ||
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+ !mtd->read_oob || !mtd->write_oob) {
+#else
+ !mtd->write_ecc ||
+ !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) {
+#endif
+ T(YAFFS_TRACE_ALWAYS,
+ ("yaffs: MTD device does not support required "
+ "functions\n"));;
+ return NULL;
+ }
+
+ if (WRITE_SIZE(mtd) < 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 (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;
+ dev->name = mtd->name;
+
+ /* Set up the memory size parameters.... */
+
+ nBlocks = mtd->size / (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK);
+ dev->startBlock = 0;
+ dev->endBlock = nBlocks - 1;
+ dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
+ dev->nDataBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+ dev->nReservedBlocks = 5;
+ dev->nShortOpCaches = (options.no_cache) ? 0 : 10;
+
+ /* ... 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;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+ dev->nDataBytesPerChunk = mtd->writesize;
+ dev->nChunksPerBlock = mtd->erasesize / mtd->writesize;
+#else
+ dev->nDataBytesPerChunk = mtd->oobblock;
+ dev->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
+#endif
+ nBlocks = mtd->size / mtd->erasesize;
+
+ dev->nCheckpointReservedBlocks = CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS;
+ dev->startBlock = 0;
+ dev->endBlock = nBlocks - 1;
+ } else {
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+ /* use the MTD interface in yaffs_mtdif1.c */
+ dev->writeChunkWithTagsToNAND =
+ nandmtd1_WriteChunkWithTagsToNAND;
+ dev->readChunkWithTagsFromNAND =
+ nandmtd1_ReadChunkWithTagsFromNAND;
+ dev->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
+ dev->queryNANDBlock = nandmtd1_QueryNANDBlock;
+#else
+ dev->writeChunkToNAND = nandmtd_WriteChunkToNAND;
+ dev->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
+#endif
+ dev->isYaffs2 = 0;
+ }
+ /* ... and common functions */
+ dev->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
+ dev->initialiseNAND = nandmtd_InitialiseNAND;
+
+ dev->putSuperFunc = yaffs_MTDPutSuper;
+
+ dev->superBlock = (void *)sb;
+ dev->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
+
+
+#ifndef CONFIG_YAFFS_DOES_ECC
+ dev->useNANDECC = 1;
+#endif
+
+#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
+ dev->wideTnodesDisabled = 1;
+#endif
+
+ dev->skipCheckpointRead = options.skip_checkpoint_read;
+ dev->skipCheckpointWrite = options.skip_checkpoint_write;
+
+ /* we assume this is protected by lock_kernel() in mount/umount */
+ list_add_tail(&dev->devList, &yaffs_dev_list);
+
+ 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"));
+
+ /* Release lock before yaffs_get_inode() */
+ yaffs_GrossUnlock(dev);
+
+ /* Create root inode */
+ if (err == YAFFS_OK)
+ inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0,
+ yaffs_Root(dev));
+
+ if (!inode)
+ return NULL;
+
+ 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;
+}
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data,
+ int silent)
+{
+ return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL;
+}
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+static int yaffs_read_super(struct file_system_type *fs,
+ int flags, const char *dev_name,
+ void *data, struct vfsmount *mnt)
+{
+
+ return get_sb_bdev(fs, flags, dev_name, data,
+ yaffs_internal_read_super_mtd, mnt);
+}
+#else
+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);
+}
+#endif
+
+static struct file_system_type yaffs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "yaffs",
+ .get_sb = yaffs_read_super,
+ .kill_sb = kill_block_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, sb, data, silent);
+}
+
+static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super,
+ FS_REQUIRES_DEV);
+#endif
+
+
+#ifdef CONFIG_YAFFS_YAFFS2
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data,
+ int silent)
+{
+ return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL;
+}
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
+static int yaffs2_read_super(struct file_system_type *fs,
+ int flags, const char *dev_name, void *data,
+ struct vfsmount *mnt)
+{
+ return get_sb_bdev(fs, flags, dev_name, data,
+ yaffs2_internal_read_super_mtd, mnt);
+}
+#else
+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);
+}
+#endif
+
+static struct file_system_type yaffs2_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "yaffs2",
+ .get_sb = yaffs2_read_super,
+ .kill_sb = kill_block_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, sb, data, silent);
+}
+
+static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super,
+ FS_REQUIRES_DEV);
+#endif
+
+#endif /* CONFIG_YAFFS_YAFFS2 */
+
+static struct proc_dir_entry *my_proc_entry;
+
+static char *yaffs_dump_dev(char *buf, yaffs_Device * dev)
+{
+ buf += sprintf(buf, "startBlock......... %d\n", dev->startBlock);
+ buf += sprintf(buf, "endBlock........... %d\n", dev->endBlock);
+ buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk);
+ 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, "nReservedBlocks.... %d\n", dev->nReservedBlocks);
+ buf += sprintf(buf, "nCheckptResBlocks.. %d\n", dev->nCheckpointReservedBlocks);
+ buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
+ 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, "nShortOpCaches..... %d\n", dev->nShortOpCaches);
+ 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)
+{
+ struct list_head *item;
+ char *buf = page;
+ int step = offset;
+ int n = 0;
+
+ /* Get proc_file_read() to step 'offset' by one on each sucessive call.
+ * We use 'offset' (*ppos) to indicate where we are in devList.
+ * This also assumes the user has posted a read buffer large
+ * enough to hold the complete output; but that's life in /proc.
+ */
+
+ *(int *)start = 1;
+
+ /* Print header first */
+ if (step == 0) {
+ buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__
+ "\n%s\n%s\n", yaffs_fs_c_version,
+ yaffs_guts_c_version);
+ }
+
+ /* hold lock_kernel while traversing yaffs_dev_list */
+ lock_kernel();
+
+ /* Locate and print the Nth entry. Order N-squared but N is small. */
+ list_for_each(item, &yaffs_dev_list) {
+ yaffs_Device *dev = list_entry(item, yaffs_Device, devList);
+ if (n < step) {
+ n++;
+ continue;
+ }
+ buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->name);
+ buf = yaffs_dump_dev(buf, dev);
+ break;
+ }
+ unlock_kernel();
+
+ return buf - page < count ? buf - page : count;
+}
+
+/**
+ * Set the verbosity of the warnings and error messages.
+ *
+ * Note that the names can only be a..z or _ with the current code.
+ */
+
+static struct {
+ char *mask_name;
+ unsigned mask_bitfield;
+} mask_flags[] = {
+ {"allocate", YAFFS_TRACE_ALLOCATE},
+ {"always", YAFFS_TRACE_ALWAYS},
+ {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS},
+ {"buffers", YAFFS_TRACE_BUFFERS},
+ {"bug", YAFFS_TRACE_BUG},
+ {"checkpt", YAFFS_TRACE_CHECKPOINT},
+ {"deletion", YAFFS_TRACE_DELETION},
+ {"erase", YAFFS_TRACE_ERASE},
+ {"error", YAFFS_TRACE_ERROR},
+ {"gc_detail", YAFFS_TRACE_GC_DETAIL},
+ {"gc", YAFFS_TRACE_GC},
+ {"mtd", YAFFS_TRACE_MTD},
+ {"nandaccess", YAFFS_TRACE_NANDACCESS},
+ {"os", YAFFS_TRACE_OS},
+ {"scan_debug", YAFFS_TRACE_SCAN_DEBUG},
+ {"scan", YAFFS_TRACE_SCAN},
+ {"tracing", YAFFS_TRACE_TRACING},
+
+ {"verify", YAFFS_TRACE_VERIFY},
+ {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
+ {"verify_full", YAFFS_TRACE_VERIFY_FULL},
+ {"verify_all", YAFFS_TRACE_VERIFY_ALL},
+
+ {"write", YAFFS_TRACE_WRITE},
+ {"all", 0xffffffff},
+ {"none", 0},
+ {NULL, 0},
+};
+
+#define MAX_MASK_NAME_LENGTH 40
+static int yaffs_proc_write(struct file *file, const char *buf,
+ unsigned long count, void *data)
+{
+ unsigned rg = 0, mask_bitfield;
+ char *end;
+ char *mask_name;
+ const char *x;
+ char substring[MAX_MASK_NAME_LENGTH+1];
+ int i;
+ int done = 0;
+ int add, len = 0;
+ int pos = 0;
+
+ rg = yaffs_traceMask;
+
+ while (!done && (pos < count)) {
+ done = 1;
+ while ((pos < count) && isspace(buf[pos])) {
+ pos++;
+ }
+
+ switch (buf[pos]) {
+ case '+':
+ case '-':
+ case '=':
+ add = buf[pos];
+ pos++;
+ break;
+
+ default:
+ add = ' ';
+ break;
+ }
+ mask_name = NULL;
+
+ mask_bitfield = simple_strtoul(buf + pos, &end, 0);
+ if (end > buf + pos) {
+ mask_name = "numeral";
+ len = end - (buf + pos);
+ pos += len;
+ done = 0;
+ } else {
+ for(x = buf + pos, i = 0;
+ (*x == '_' || (*x >='a' && *x <= 'z')) &&
+ i <MAX_MASK_NAME_LENGTH; x++, i++, pos++)
+ substring[i] = *x;
+ substring[i] = '\0';
+
+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
+ if(strcmp(substring,mask_flags[i].mask_name) == 0){
+ mask_name = mask_flags[i].mask_name;
+ mask_bitfield = mask_flags[i].mask_bitfield;
+ done = 0;
+ break;
+ }
+ }
+ }
+
+ if (mask_name != NULL) {
+ done = 0;
+ switch(add) {
+ case '-':
+ rg &= ~mask_bitfield;
+ break;
+ case '+':
+ rg |= mask_bitfield;
+ break;
+ case '=':
+ rg = mask_bitfield;
+ break;
+ default:
+ rg |= mask_bitfield;
+ break;
+ }
+ }
+ }
+
+ yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS;
+
+ printk("new trace = 0x%08X\n",yaffs_traceMask);
+
+ if (rg & YAFFS_TRACE_ALWAYS) {
+ for (i = 0; mask_flags[i].mask_name != NULL; i++) {
+ char flag;
+ flag = ((rg & mask_flags[i].mask_bitfield) == mask_flags[i].mask_bitfield) ? '+' : '-';
+ printk("%c%s\n", flag, mask_flags[i].mask_name);
+ }
+ }
+
+ 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_YAFFS1
+ {&yaffs_fs_type, 0},
+//#endif
+//#ifdef CONFIG_YAFFS_YAFFS2
+ {&yaffs2_fs_type, 0},
+//#endif
+ {NULL, 0}
+};
+
+static int __init init_yaffs_fs(void)
+{
+ int error = 0;
+ struct file_system_to_install *fsinst;
+
+ T(YAFFS_TRACE_ALWAYS,
+ ("yaffs " __DATE__ " " __TIME__ " Installing. \n"));
+
+ /* Install the proc_fs entry */
+ my_proc_entry = create_proc_entry("yaffs",
+ S_IRUGO | S_IFREG,
+ &proc_root);
+
+ if (my_proc_entry) {
+ my_proc_entry->write_proc = yaffs_proc_write;
+ my_proc_entry->read_proc = yaffs_proc_read;
+ my_proc_entry->data = NULL;
+ } else {
+ 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., 2002-2006");
+MODULE_LICENSE("GPL");
projects / 15.05 / openwrt.git / blobdiff