+++ /dev/null
-/*
- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
- *
- * Copyright (C) 2002-2010 Aleph One Ltd.
- * for Toby Churchill Ltd and Brightstar Engineering
- *
- * Created by Charles Manning <charles@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.
- */
-
-#include <linux/version.h>
-
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10))
-#define YAFFS_COMPILE_BACKGROUND
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6, 23))
-#define YAFFS_COMPILE_FREEZER
-#endif
-#endif
-
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
-#define YAFFS_COMPILE_EXPORTFS
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35))
-#define YAFFS_USE_SETATTR_COPY
-#define YAFFS_USE_TRUNCATE_SETSIZE
-#endif
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35))
-#define YAFFS_HAS_EVICT_INODE
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
-#define YAFFS_NEW_FOLLOW_LINK 1
-#else
-#define YAFFS_NEW_FOLLOW_LINK 0
-#endif
-
-#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/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 (YAFFS_NEW_FOLLOW_LINK == 1)
-#include <linux/namei.h>
-#endif
-
-#ifdef YAFFS_COMPILE_EXPORTFS
-#include <linux/exportfs.h>
-#endif
-
-#ifdef YAFFS_COMPILE_BACKGROUND
-#include <linux/kthread.h>
-#include <linux/delay.h>
-#endif
-#ifdef YAFFS_COMPILE_FREEZER
-#include <linux/freezer.h>
-#endif
-
-#include <asm/div64.h>
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-
-#include <linux/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, 26))
-#define YPROC_ROOT (&proc_root)
-#else
-#define YPROC_ROOT NULL
-#endif
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26))
-#define Y_INIT_TIMER(a) init_timer(a)
-#else
-#define Y_INIT_TIMER(a) init_timer_on_stack(a)
-#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
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
-#define YAFFS_USE_WRITE_BEGIN_END 1
-#else
-#define YAFFS_USE_WRITE_BEGIN_END 0
-#endif
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
-static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
-{
- uint64_t result = partition_size;
- do_div(result, block_size);
- return (uint32_t)result;
-}
-#else
-#define YCALCBLOCKS(s, b) ((s)/(b))
-#endif
-
-#include <linux/uaccess.h>
-#include <linux/mtd/mtd.h>
-
-#include "yportenv.h"
-#include "yaffs_trace.h"
-#include "yaffs_guts.h"
-
-#include "yaffs_linux.h"
-
-#include "yaffs_mtdif.h"
-#include "yaffs_mtdif1.h"
-#include "yaffs_mtdif2.h"
-
-unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS | YAFFS_TRACE_ALWAYS;
-unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
-unsigned int yaffs_auto_checkpoint = 1;
-unsigned int yaffs_gc_control = 1;
-unsigned int yaffs_bg_enable = 1;
-
-/* Module Parameters */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
-module_param(yaffs_traceMask, uint, 0644);
-module_param(yaffs_wr_attempts, uint, 0644);
-module_param(yaffs_auto_checkpoint, uint, 0644);
-module_param(yaffs_gc_control, uint, 0644);
-module_param(yaffs_bg_enable, uint, 0644);
-#else
-MODULE_PARM(yaffs_traceMask, "i");
-MODULE_PARM(yaffs_wr_attempts, "i");
-MODULE_PARM(yaffs_auto_checkpoint, "i");
-MODULE_PARM(yaffs_gc_control, "i");
-#endif
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
-/* use iget and read_inode */
-#define Y_IGET(sb, inum) iget((sb), (inum))
-static void yaffs_read_inode(struct inode *inode);
-
-#else
-/* Call local equivalent */
-#define YAFFS_USE_OWN_IGET
-#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
-
-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
-#endif
-
-#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
-
-
-#define update_dir_time(dir) do {\
- (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
- } while(0)
-
-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);
-static ssize_t yaffs_hold_space(struct file *f);
-static void yaffs_release_space(struct file *f);
-
-#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
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-static int yaffs_sync_object(struct file *file, int datasync);
-#else
-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
- int datasync);
-#endif
-
-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
-
-#ifdef YAFFS_HAS_PUT_INODE
-static void yaffs_put_inode(struct inode *inode);
-#endif
-
-#ifdef YAFFS_HAS_EVICT_INODE
-static void yaffs_evict_inode(struct inode *);
-#else
-static void yaffs_delete_inode(struct inode *);
-static void yaffs_clear_inode(struct inode *);
-#endif
-
-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
-
-#ifdef CONFIG_YAFFS_XATTR
-int yaffs_setxattr(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags);
-ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff,
- size_t size);
-int yaffs_removexattr(struct dentry *dentry, const char *name);
-ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size);
-#endif
-
-
-#if (YAFFS_USE_WRITE_BEGIN_END != 0)
-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata);
-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *pg, void *fsdadata);
-#else
-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);
-
-#endif
-
-static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
- int buflen);
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
-void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias);
-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 void yaffs_MarkSuperBlockDirty(yaffs_Device *dev);
-
-static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin);
-
-static int yaffs_vfs_setattr(struct inode *, struct iattr *);
-
-
-static struct address_space_operations yaffs_file_address_operations = {
- .readpage = yaffs_readpage,
- .writepage = yaffs_writepage,
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
- .write_begin = yaffs_write_begin,
- .write_end = yaffs_write_end,
-#else
- .prepare_write = yaffs_prepare_write,
- .commit_write = yaffs_commit_write,
-#endif
-};
-
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
-static const 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,
- .llseek = generic_file_llseek,
-};
-
-#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
-
-static const 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 const 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
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25))
-static void zero_user_segment(struct page *page, unsigned start, unsigned end)
-{
- void * kaddr = kmap_atomic(page, KM_USER0);
- memset(kaddr + start, 0, end - start);
- kunmap_atomic(kaddr, KM_USER0);
- flush_dcache_page(page);
-}
-#endif
-
-
-static const struct inode_operations yaffs_file_inode_operations = {
- .setattr = yaffs_setattr,
-#ifdef CONFIG_YAFFS_XATTR
- .setxattr = yaffs_setxattr,
- .getxattr = yaffs_getxattr,
- .listxattr = yaffs_listxattr,
- .removexattr = yaffs_removexattr,
-#endif
-};
-
-static const struct inode_operations yaffs_symlink_inode_operations = {
- .readlink = yaffs_readlink,
- .follow_link = yaffs_follow_link,
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
- .put_link = yaffs_put_link,
-#endif
- .setattr = yaffs_setattr,
-#ifdef CONFIG_YAFFS_XATTR
- .setxattr = yaffs_setxattr,
- .getxattr = yaffs_getxattr,
- .listxattr = yaffs_listxattr,
- .removexattr = yaffs_removexattr,
-#endif
-};
-
-static const 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,
-#ifdef CONFIG_YAFFS_XATTR
- .setxattr = yaffs_setxattr,
- .getxattr = yaffs_getxattr,
- .listxattr = yaffs_listxattr,
- .removexattr = yaffs_removexattr,
-#endif
-};
-
-static const struct file_operations yaffs_dir_operations = {
- .read = generic_read_dir,
- .readdir = yaffs_readdir,
- .fsync = yaffs_sync_object,
- .llseek = yaffs_dir_llseek,
-};
-
-static const struct super_operations yaffs_super_ops = {
- .statfs = yaffs_statfs,
-
-#ifndef YAFFS_USE_OWN_IGET
- .read_inode = yaffs_read_inode,
-#endif
-#ifdef YAFFS_HAS_PUT_INODE
- .put_inode = yaffs_put_inode,
-#endif
- .put_super = yaffs_put_super,
-#ifdef YAFFS_HAS_EVICT_INODE
- .evict_inode = yaffs_evict_inode,
-#else
- .delete_inode = yaffs_delete_inode,
- .clear_inode = yaffs_clear_inode,
-#endif
- .sync_fs = yaffs_sync_fs,
- .write_super = yaffs_write_super,
-};
-
-
-static int yaffs_vfs_setattr(struct inode *inode, struct iattr *attr)
-{
-#ifdef YAFFS_USE_SETATTR_COPY
- setattr_copy(inode,attr);
- return 0;
-#else
- return inode_setattr(inode, attr);
-#endif
-
-}
-
-static int yaffs_vfs_setsize(struct inode *inode, loff_t newsize)
-{
-#ifdef YAFFS_USE_TRUNCATE_SETSIZE
- truncate_setsize(inode,newsize);
- return 0;
-#else
- truncate_inode_pages(&inode->i_data,newsize);
- return 0;
-#endif
-
-}
-
-static unsigned yaffs_gc_control_callback(yaffs_Device *dev)
-{
- return yaffs_gc_control;
-}
-
-static void yaffs_GrossLock(yaffs_Device *dev)
-{
- T(YAFFS_TRACE_LOCK, (TSTR("yaffs locking %p\n"), current));
- down(&(yaffs_DeviceToLC(dev)->grossLock));
- T(YAFFS_TRACE_LOCK, (TSTR("yaffs locked %p\n"), current));
-}
-
-static void yaffs_GrossUnlock(yaffs_Device *dev)
-{
- T(YAFFS_TRACE_LOCK, (TSTR("yaffs unlocking %p\n"), current));
- up(&(yaffs_DeviceToLC(dev)->grossLock));
-}
-
-#ifdef YAFFS_COMPILE_EXPORTFS
-
-static struct inode *
-yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, uint32_t generation)
-{
- return Y_IGET(sb, ino);
-}
-
-static struct dentry *
-yaffs2_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type)
-{
- return generic_fh_to_dentry(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode) ;
-}
-
-static struct dentry *
- yaffs2_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type)
-{
- return generic_fh_to_parent(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode);
-}
-
-struct dentry *yaffs2_get_parent(struct dentry *dentry)
-{
-
- struct super_block *sb = dentry->d_inode->i_sb;
- struct dentry *parent = ERR_PTR(-ENOENT);
- struct inode *inode;
- unsigned long parent_ino;
- yaffs_Object *d_obj;
- yaffs_Object *parent_obj;
-
- d_obj = yaffs_InodeToObject(dentry->d_inode);
-
- if (d_obj) {
- parent_obj = d_obj->parent;
- if (parent_obj) {
- parent_ino = yaffs_GetObjectInode(parent_obj);
- inode = Y_IGET(sb, parent_ino);
-
- if (IS_ERR(inode)) {
- parent = ERR_CAST(inode);
- } else {
- parent = d_obtain_alias(inode);
- if (!IS_ERR(parent)) {
- parent = ERR_PTR(-ENOMEM);
- iput(inode);
- }
- }
- }
- }
-
- return parent;
-}
-
-/* Just declare a zero structure as a NULL value implies
- * using the default functions of exportfs.
- */
-
-static struct export_operations yaffs_export_ops =
-{
- .fh_to_dentry = yaffs2_fh_to_dentry,
- .fh_to_parent = yaffs2_fh_to_parent,
- .get_parent = yaffs2_get_parent,
-} ;
-
-#endif
-
-/*-----------------------------------------------------------------*/
-/* Directory search context allows us to unlock access to yaffs during
- * filldir without causing problems with the directory being modified.
- * This is similar to the tried and tested mechanism used in yaffs direct.
- *
- * A search context iterates along a doubly linked list of siblings in the
- * directory. If the iterating object is deleted then this would corrupt
- * the list iteration, likely causing a crash. The search context avoids
- * this by using the removeObjectCallback to move the search context to the
- * next object before the object is deleted.
- *
- * Many readdirs (and thus seach conexts) may be alive simulateously so
- * each yaffs_Device has a list of these.
- *
- * A seach context lives for the duration of a readdir.
- *
- * All these functions must be called while yaffs is locked.
- */
-
-struct yaffs_SearchContext {
- yaffs_Device *dev;
- yaffs_Object *dirObj;
- yaffs_Object *nextReturn;
- struct ylist_head others;
-};
-
-/*
- * yaffs_NewSearch() creates a new search context, initialises it and
- * adds it to the device's search context list.
- *
- * Called at start of readdir.
- */
-static struct yaffs_SearchContext * yaffs_NewSearch(yaffs_Object *dir)
-{
- yaffs_Device *dev = dir->myDev;
- struct yaffs_SearchContext *sc = YMALLOC(sizeof(struct yaffs_SearchContext));
- if(sc){
- sc->dirObj = dir;
- sc->dev = dev;
- if( ylist_empty(&sc->dirObj->variant.directoryVariant.children))
- sc->nextReturn = NULL;
- else
- sc->nextReturn = ylist_entry(
- dir->variant.directoryVariant.children.next,
- yaffs_Object,siblings);
- YINIT_LIST_HEAD(&sc->others);
- ylist_add(&sc->others,&(yaffs_DeviceToLC(dev)->searchContexts));
- }
- return sc;
-}
-
-/*
- * yaffs_EndSearch() disposes of a search context and cleans up.
- */
-static void yaffs_EndSearch(struct yaffs_SearchContext * sc)
-{
- if(sc){
- ylist_del(&sc->others);
- YFREE(sc);
- }
-}
-
-/*
- * yaffs_SearchAdvance() moves a search context to the next object.
- * Called when the search iterates or when an object removal causes
- * the search context to be moved to the next object.
- */
-static void yaffs_SearchAdvance(struct yaffs_SearchContext *sc)
-{
- if(!sc)
- return;
-
- if( sc->nextReturn == NULL ||
- ylist_empty(&sc->dirObj->variant.directoryVariant.children))
- sc->nextReturn = NULL;
- else {
- struct ylist_head *next = sc->nextReturn->siblings.next;
-
- if( next == &sc->dirObj->variant.directoryVariant.children)
- sc->nextReturn = NULL; /* end of list */
- else
- sc->nextReturn = ylist_entry(next,yaffs_Object,siblings);
- }
-}
-
-/*
- * yaffs_RemoveObjectCallback() is called when an object is unlinked.
- * We check open search contexts and advance any which are currently
- * on the object being iterated.
- */
-static void yaffs_RemoveObjectCallback(yaffs_Object *obj)
-{
-
- struct ylist_head *i;
- struct yaffs_SearchContext *sc;
- struct ylist_head *search_contexts = &(yaffs_DeviceToLC(obj->myDev)->searchContexts);
-
-
- /* Iterate through the directory search contexts.
- * If any are currently on the object being removed, then advance
- * the search context to the next object to prevent a hanging pointer.
- */
- ylist_for_each(i, search_contexts) {
- if (i) {
- sc = ylist_entry(i, struct yaffs_SearchContext,others);
- if(sc->nextReturn == obj)
- yaffs_SearchAdvance(sc);
- }
- }
-
-}
-
-
-/*-----------------------------------------------------------------*/
-
-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 (YAFFS_NEW_FOLLOW_LINK == 1)
-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;
- }
-
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
- nd_set_link(nd, alias);
- ret = (int)alias;
-out:
- return ERR_PTR(ret);
-#else
- ret = vfs_follow_link(nd, alias);
- kfree(alias);
-out:
- return ret;
-#endif
-}
-
-#if (YAFFS_NEW_FOLLOW_LINK == 1)
-void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias) {
- kfree(alias);
-}
-#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;
-
- if(current != yaffs_DeviceToLC(dev)->readdirProcess)
- yaffs_GrossLock(dev);
-
- T(YAFFS_TRACE_OS,
- (TSTR("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() */
- if(current != yaffs_DeviceToLC(dev)->readdirProcess)
- yaffs_GrossUnlock(dev);
-
- if (obj) {
- T(YAFFS_TRACE_OS,
- (TSTR("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,
- (TSTR("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,(TSTR("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;
-}
-
-
-#ifdef YAFFS_HAS_PUT_INODE
-
-/* 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,
- (TSTR("yaffs_put_inode: ino %d, count %d\n"), (int)inode->i_ino,
- atomic_read(&inode->i_count)));
-
-}
-#endif
-
-
-static void yaffs_UnstitchObject(struct inode *inode, yaffs_Object *obj)
-{
- /* 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);
-}
-
-#ifdef YAFFS_HAS_EVICT_INODE
-/* yaffs_evict_inode combines into one operation what was previously done in
- * yaffs_clear_inode() and yaffs_delete_inode()
- *
- */
-static void yaffs_evict_inode( struct inode *inode)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
- int deleteme = 0;
-
- obj = yaffs_InodeToObject(inode);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_evict_inode: ino %d, count %d %s\n"), (int)inode->i_ino,
- atomic_read(&inode->i_count),
- obj ? "object exists" : "null object"));
-
- if (!inode->i_nlink && !is_bad_inode(inode))
- deleteme = 1;
- truncate_inode_pages(&inode->i_data,0);
- end_writeback(inode);
-
- if(deleteme && obj){
- dev = obj->myDev;
- yaffs_GrossLock(dev);
- yaffs_DeleteObject(obj);
- yaffs_GrossUnlock(dev);
- }
- if (obj) {
- dev = obj->myDev;
- yaffs_GrossLock(dev);
- yaffs_UnstitchObject(inode,obj);
- yaffs_GrossUnlock(dev);
- }
-
-
-}
-#else
-
-/* clear is called to tell the fs to release any per-inode data it holds.
- * The object might still exist on disk and is just being thrown out of the cache
- * or else the object has actually been deleted and we're being called via
- * the chain
- * yaffs_delete_inode() -> clear_inode()->yaffs_clear_inode()
- */
-
-static void yaffs_clear_inode(struct inode *inode)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
-
- obj = yaffs_InodeToObject(inode);
-
- T(YAFFS_TRACE_OS,
- (TSTR("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);
- yaffs_UnstitchObject(inode,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,
- (TSTR("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_DeleteObject(obj);
- yaffs_GrossUnlock(dev);
- }
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
- truncate_inode_pages(&inode->i_data, 0);
-#endif
- clear_inode(inode);
-}
-#endif
-
-
-#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,
- (TSTR("yaffs_file_flush object %d (%s)\n"), obj->objectId,
- obj->dirty ? "dirty" : "clean"));
-
- yaffs_GrossLock(dev);
-
- yaffs_FlushFile(obj, 1, 0);
-
- 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,
- (TSTR("yaffs_readpage_nolock 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, (TSTR("yaffs_readpage_nolock 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)
-{
- int ret;
-
- T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage\n")));
- ret=yaffs_readpage_unlock(f, pg);
- T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage done\n")));
- return ret;
-}
-
-/* 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
-{
- yaffs_Device *dev;
- struct address_space *mapping = page->mapping;
- struct inode *inode;
- unsigned long end_index;
- char *buffer;
- yaffs_Object *obj;
- int nWritten = 0;
- unsigned nBytes;
- loff_t i_size;
-
- if (!mapping)
- BUG();
- inode = mapping->host;
- if (!inode)
- BUG();
- i_size = i_size_read(inode);
-
- end_index = i_size >> PAGE_CACHE_SHIFT;
-
- if(page->index < end_index)
- nBytes = PAGE_CACHE_SIZE;
- else {
- nBytes = i_size & (PAGE_CACHE_SIZE -1);
-
- if (page->index > end_index || !nBytes) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_writepage at %08x, inode size = %08x!!!\n"),
- (unsigned)(page->index << PAGE_CACHE_SHIFT),
- (unsigned)inode->i_size));
- T(YAFFS_TRACE_OS,
- (TSTR(" -> don't care!!\n")));
-
- zero_user_segment(page,0,PAGE_CACHE_SIZE);
- set_page_writeback(page);
- unlock_page(page);
- end_page_writeback(page);
- return 0;
- }
- }
-
- if(nBytes != PAGE_CACHE_SIZE)
- zero_user_segment(page,nBytes,PAGE_CACHE_SIZE);
-
- get_page(page);
-
- buffer = kmap(page);
-
- obj = yaffs_InodeToObject(inode);
- dev = obj->myDev;
- yaffs_GrossLock(dev);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_writepage at %08x, size %08x\n"),
- (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
- T(YAFFS_TRACE_OS,
- (TSTR("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);
-
- yaffs_MarkSuperBlockDirty(dev);
-
- T(YAFFS_TRACE_OS,
- (TSTR("writepag1: obj = %05x, ino = %05x\n"),
- (int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
-
- yaffs_GrossUnlock(dev);
-
- kunmap(page);
- set_page_writeback(page);
- unlock_page(page);
- end_page_writeback(page);
- put_page(page);
-
- return (nWritten == nBytes) ? 0 : -ENOSPC;
-}
-
-
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata)
-{
- struct page *pg = NULL;
- pgoff_t index = pos >> PAGE_CACHE_SHIFT;
-
- int ret = 0;
- int space_held = 0;
-
- /* Get a page */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
- pg = grab_cache_page_write_begin(mapping, index, flags);
-#else
- pg = __grab_cache_page(mapping, index);
-#endif
-
- *pagep = pg;
- if (!pg) {
- ret = -ENOMEM;
- goto out;
- }
- T(YAFFS_TRACE_OS,
- (TSTR("start yaffs_write_begin index %d(%x) uptodate %d\n"),
- (int)index,(int)index,Page_Uptodate(pg) ? 1 : 0));
-
- /* Get fs space */
- space_held = yaffs_hold_space(filp);
-
- if (!space_held) {
- ret = -ENOSPC;
- goto out;
- }
-
- /* Update page if required */
-
- if (!Page_Uptodate(pg))
- ret = yaffs_readpage_nolock(filp, pg);
-
- if (ret)
- goto out;
-
- /* Happy path return */
- T(YAFFS_TRACE_OS, (TSTR("end yaffs_write_begin - ok\n")));
-
- return 0;
-
-out:
- T(YAFFS_TRACE_OS,
- (TSTR("end yaffs_write_begin fail returning %d\n"), ret));
- if (space_held)
- yaffs_release_space(filp);
- if (pg) {
- unlock_page(pg);
- page_cache_release(pg);
- }
- return ret;
-}
-
-#else
-
-static int yaffs_prepare_write(struct file *f, struct page *pg,
- unsigned offset, unsigned to)
-{
- T(YAFFS_TRACE_OS, (TSTR("yaffs_prepair_write\n")));
-
- if (!Page_Uptodate(pg))
- return yaffs_readpage_nolock(f, pg);
- return 0;
-}
-#endif
-
-#if (YAFFS_USE_WRITE_BEGIN_END > 0)
-static int yaffs_write_end(struct file *filp, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *pg, void *fsdadata)
-{
- int ret = 0;
- void *addr, *kva;
- uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1);
-
- kva = kmap(pg);
- addr = kva + offset_into_page;
-
- T(YAFFS_TRACE_OS,
- ("yaffs_write_end addr %p pos %x nBytes %d\n",
- addr,(unsigned)pos, copied));
-
- ret = yaffs_file_write(filp, addr, copied, &pos);
-
- if (ret != copied) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_write_end not same size ret %d copied %d\n"),
- ret, copied));
- SetPageError(pg);
- } else {
- /* Nothing */
- }
-
- kunmap(pg);
-
- yaffs_release_space(filp);
- unlock_page(pg);
- page_cache_release(pg);
- return ret;
-}
-#else
-
-static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
- unsigned to)
-{
- void *addr, *kva;
-
- loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
- int nBytes = to - offset;
- int nWritten;
-
- unsigned spos = pos;
- unsigned saddr;
-
- kva = kmap(pg);
- addr = kva + offset;
-
- saddr = (unsigned) addr;
-
- T(YAFFS_TRACE_OS,
- (TSTR("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,
- (TSTR("yaffs_commit_write not same size nWritten %d nBytes %d\n"),
- nWritten, nBytes));
- SetPageError(pg);
- } else {
- /* Nothing */
- }
-
- kunmap(pg);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_commit_write returning %d\n"),
- nWritten == nBytes ? 0 : nWritten));
-
- return nWritten == nBytes ? 0 : nWritten;
-}
-#endif
-
-
-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_flags |= S_NOATIME;
-
- 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,
- (TSTR("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,
- (TSTR("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,
- (TSTR("yaffs_get_inode for NULL super_block!!\n")));
- return NULL;
-
- }
-
- if (!obj) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_get_inode for NULL object!!\n")));
- return NULL;
-
- }
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_get_inode for object %d\n"), obj->objectId));
-
- inode = Y_IGET(sb, obj->objectId);
- if (IS_ERR(inode))
- return NULL;
-
- /* 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,
- (TSTR("yaffs_file_write: hey obj is null!\n")));
- else
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_file_write about to write writing %u(%x) bytes"
- "to object %d at %d(%x)\n"),
- (unsigned) n, (unsigned) n, obj->objectId, ipos,ipos));
-
- nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0);
-
- yaffs_MarkSuperBlockDirty(dev);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_file_write: %d(%x) bytes written\n"),
- (unsigned )n,(unsigned)n));
-
- 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,
- (TSTR("yaffs_file_write size updated to %d bytes, "
- "%d blocks\n"),
- ipos, (int)(inode->i_blocks)));
- }
-
- }
- yaffs_GrossUnlock(dev);
- return (nWritten == 0) && (n > 0) ? -ENOSPC : nWritten;
-}
-
-/* Space holding and freeing is done to ensure we have space available for write_begin/end */
-/* For now we just assume few parallel writes and check against a small number. */
-/* Todo: need to do this with a counter to handle parallel reads better */
-
-static ssize_t yaffs_hold_space(struct file *f)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
-
- int nFreeChunks;
-
-
- obj = yaffs_DentryToObject(f->f_dentry);
-
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
- nFreeChunks = yaffs_GetNumberOfFreeChunks(dev);
-
- yaffs_GrossUnlock(dev);
-
- return (nFreeChunks > 20) ? 1 : 0;
-}
-
-static void yaffs_release_space(struct file *f)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
-
-
- obj = yaffs_DentryToObject(f->f_dentry);
-
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
-
- yaffs_GrossUnlock(dev);
-}
-
-
-static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin)
-{
- long long retval;
-
- lock_kernel();
-
- switch (origin){
- case 2:
- offset += i_size_read(file->f_path.dentry->d_inode);
- break;
- case 1:
- offset += file->f_pos;
- }
- retval = -EINVAL;
-
- if (offset >= 0){
- if (offset != file->f_pos)
- file->f_pos = offset;
-
- retval = offset;
- }
- unlock_kernel();
- return retval;
-}
-
-
-static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
-{
- yaffs_Object *obj;
- yaffs_Device *dev;
- struct yaffs_SearchContext *sc;
- struct inode *inode = f->f_dentry->d_inode;
- unsigned long offset, curoffs;
- yaffs_Object *l;
- int retVal = 0;
-
- char name[YAFFS_MAX_NAME_LENGTH + 1];
-
- obj = yaffs_DentryToObject(f->f_dentry);
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
- yaffs_DeviceToLC(dev)->readdirProcess = current;
-
- offset = f->f_pos;
-
- sc = yaffs_NewSearch(obj);
- if(!sc){
- retVal = -ENOMEM;
- goto out;
- }
-
- T(YAFFS_TRACE_OS, (TSTR("yaffs_readdir: starting at %d\n"), (int)offset));
-
- if (offset == 0) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_readdir: entry . ino %d \n"),
- (int)inode->i_ino));
- yaffs_GrossUnlock(dev);
- if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0){
- yaffs_GrossLock(dev);
- goto out;
- }
- yaffs_GrossLock(dev);
- offset++;
- f->f_pos++;
- }
- if (offset == 1) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_readdir: entry .. ino %d \n"),
- (int)f->f_dentry->d_parent->d_inode->i_ino));
- yaffs_GrossUnlock(dev);
- if (filldir(dirent, "..", 2, offset,
- f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0){
- yaffs_GrossLock(dev);
- goto out;
- }
- yaffs_GrossLock(dev);
- 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;
- }
-
- while(sc->nextReturn){
- curoffs++;
- l = sc->nextReturn;
- if (curoffs >= offset) {
- int this_inode = yaffs_GetObjectInode(l);
- int this_type = yaffs_GetObjectType(l);
-
- yaffs_GetObjectName(l, name,
- YAFFS_MAX_NAME_LENGTH + 1);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_readdir: %s inode %d\n"),
- name, yaffs_GetObjectInode(l)));
-
- yaffs_GrossUnlock(dev);
-
- if (filldir(dirent,
- name,
- strlen(name),
- offset,
- this_inode,
- this_type) < 0){
- yaffs_GrossLock(dev);
- goto out;
- }
-
- yaffs_GrossLock(dev);
-
- offset++;
- f->f_pos++;
- }
- yaffs_SearchAdvance(sc);
- }
-
-out:
- yaffs_EndSearch(sc);
- yaffs_DeviceToLC(dev)->readdirProcess = NULL;
- yaffs_GrossUnlock(dev);
-
- return retVal;
-}
-
-
-
-/*
- * File creation. Allocate an inode, and we're done..
- */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
-#define YCRED(x) x
-#else
-#define YCRED(x) (x->cred)
-#endif
-
-#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 = YCRED(current)->fsuid;
- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
-
- if ((dir->i_mode & S_ISGID) && S_ISDIR(mode))
- mode |= S_ISGID;
-
- if (parent) {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_mknod: parent object %d type %d\n"),
- parent->objectId, parent->variantType));
- } else {
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_mknod: could not get parent object\n")));
- return -EPERM;
- }
-
- T(YAFFS_TRACE_OS, (TSTR("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, (TSTR("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, (TSTR("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,
- (TSTR("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, (TSTR("yaffs_mknod: making symlink\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);
- update_dir_time(dir);
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_mknod created object %d count = %d\n"),
- obj->objectId, atomic_read(&inode->i_count)));
- error = 0;
- yaffs_FillInodeFromObject(dir,parent);
- } else {
- T(YAFFS_TRACE_OS,
- (TSTR("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, (TSTR("yaffs_mkdir\n")));
- retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0);
- 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,(TSTR("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;
- yaffs_Object *obj;
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_unlink %d:%s\n"),
- (int)(dir->i_ino),
- dentry->d_name.name));
- obj = yaffs_InodeToObject(dir);
- dev = obj->myDev;
-
- yaffs_GrossLock(dev);
-
- retVal = yaffs_Unlink(obj, 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);
- update_dir_time(dir);
- 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, (TSTR("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,
- (TSTR("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){
- update_dir_time(dir);
- 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 = YCRED(current)->fsuid;
- gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid;
-
- T(YAFFS_TRACE_OS, (TSTR("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);
- update_dir_time(dir);
- T(YAFFS_TRACE_OS, (TSTR("symlink created OK\n")));
- return 0;
- } else {
- T(YAFFS_TRACE_OS, (TSTR("symlink not created\n")));
- }
-
- return -ENOMEM;
-}
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
-static int yaffs_sync_object(struct file *file, int datasync)
-#else
-static int yaffs_sync_object(struct file *file, struct dentry *dentry,
- int datasync)
-#endif
-{
-
- yaffs_Object *obj;
- yaffs_Device *dev;
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
- struct dentry *dentry = file->f_path.dentry;
-#endif
-
- obj = yaffs_DentryToObject(dentry);
-
- dev = obj->myDev;
-
- T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
- (TSTR("yaffs_sync_object\n")));
- yaffs_GrossLock(dev);
- yaffs_FlushFile(obj, 1, datasync);
- 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, (TSTR("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 &&
- !ylist_empty(&target->variant.directoryVariant.children)) {
-
- T(YAFFS_TRACE_OS, (TSTR("target is non-empty dir\n")));
-
- retVal = YAFFS_FAIL;
- } else {
- /* Now does unlinking internally using shadowing mechanism */
- T(YAFFS_TRACE_OS, (TSTR("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);
- }
-
- update_dir_time(old_dir);
- if(old_dir != new_dir)
- update_dir_time(new_dir);
- return 0;
- } else {
- return -ENOTEMPTY;
- }
-}
-
-static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
-{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- yaffs_Device *dev;
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_setattr of object %d\n"),
- yaffs_InodeToObject(inode)->objectId));
-
- /* Fail if a requested resize >= 2GB */
- if (attr->ia_valid & ATTR_SIZE &&
- (attr->ia_size >> 31))
- error = -EINVAL;
-
- if (error == 0)
- error = inode_change_ok(inode, attr);
- if (error == 0) {
- int result;
- if (!error){
- error = yaffs_vfs_setattr(inode, attr);
- T(YAFFS_TRACE_OS,(TSTR("inode_setattr called\n")));
- if (attr->ia_valid & ATTR_SIZE){
- yaffs_vfs_setsize(inode,attr->ia_size);
- inode->i_blocks = (inode->i_size + 511) >> 9;
- }
- }
- dev = yaffs_InodeToObject(inode)->myDev;
- if (attr->ia_valid & ATTR_SIZE){
- T(YAFFS_TRACE_OS,(TSTR("resize to %d(%x)\n"),
- (int)(attr->ia_size),(int)(attr->ia_size)));
- }
- yaffs_GrossLock(dev);
- result = yaffs_SetAttributes(yaffs_InodeToObject(inode), attr);
- if(result == YAFFS_OK) {
- error = 0;
- } else {
- error = -EPERM;
- }
- yaffs_GrossUnlock(dev);
-
- }
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_setattr done returning %d\n"),error));
-
- return error;
-}
-
-#ifdef CONFIG_YAFFS_XATTR
-int yaffs_setxattr(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
-{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- yaffs_Device *dev;
- yaffs_Object *obj = yaffs_InodeToObject(inode);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_setxattr of object %d\n"),
- obj->objectId));
-
-
- if (error == 0) {
- int result;
- dev = obj->myDev;
- yaffs_GrossLock(dev);
- result = yaffs_SetXAttribute(obj, name, value, size, flags);
- if(result == YAFFS_OK)
- error = 0;
- else if(result < 0)
- error = result;
- yaffs_GrossUnlock(dev);
-
- }
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_setxattr done returning %d\n"),error));
-
- return error;
-}
-
-
-ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff,
- size_t size)
-{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- yaffs_Device *dev;
- yaffs_Object *obj = yaffs_InodeToObject(inode);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_getxattr \"%s\" from object %d\n"),
- name, obj->objectId));
-
- if (error == 0) {
- dev = obj->myDev;
- yaffs_GrossLock(dev);
- error = yaffs_GetXAttribute(obj, name, buff, size);
- yaffs_GrossUnlock(dev);
-
- }
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_getxattr done returning %d\n"),error));
-
- return error;
-}
-
-int yaffs_removexattr(struct dentry *dentry, const char *name)
-{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- yaffs_Device *dev;
- yaffs_Object *obj = yaffs_InodeToObject(inode);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_removexattr of object %d\n"),
- obj->objectId));
-
-
- if (error == 0) {
- int result;
- dev = obj->myDev;
- yaffs_GrossLock(dev);
- result = yaffs_RemoveXAttribute(obj, name);
- if(result == YAFFS_OK)
- error = 0;
- else if(result < 0)
- error = result;
- yaffs_GrossUnlock(dev);
-
- }
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_removexattr done returning %d\n"),error));
-
- return error;
-}
-
-ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size)
-{
- struct inode *inode = dentry->d_inode;
- int error = 0;
- yaffs_Device *dev;
- yaffs_Object *obj = yaffs_InodeToObject(inode);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_listxattr of object %d\n"),
- obj->objectId));
-
-
- if (error == 0) {
- dev = obj->myDev;
- yaffs_GrossLock(dev);
- error = yaffs_ListXAttributes(obj, buff, size);
- yaffs_GrossUnlock(dev);
-
- }
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_listxattr done returning %d\n"),error));
-
- return error;
-}
-
-#endif
-
-
-#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, (TSTR("yaffs_statfs\n")));
-
- yaffs_GrossLock(dev);
-
- buf->f_type = YAFFS_MAGIC;
- buf->f_bsize = sb->s_blocksize;
- buf->f_namelen = 255;
-
- if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) {
- /* Do this if chunk size is not a power of 2 */
-
- uint64_t bytesInDev;
- uint64_t bytesFree;
-
- bytesInDev = ((uint64_t)((dev->param.endBlock - dev->param.startBlock + 1))) *
- ((uint64_t)(dev->param.nChunksPerBlock * dev->nDataBytesPerChunk));
-
- do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
- buf->f_blocks = bytesInDev;
-
- bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) *
- ((uint64_t)(dev->nDataBytesPerChunk));
-
- do_div(bytesFree, sb->s_blocksize);
-
- buf->f_bfree = bytesFree;
-
- } else if (sb->s_blocksize > dev->nDataBytesPerChunk) {
-
- buf->f_blocks =
- (dev->param.endBlock - dev->param.startBlock + 1) *
- dev->param.nChunksPerBlock /
- (sb->s_blocksize / dev->nDataBytesPerChunk);
- buf->f_bfree =
- yaffs_GetNumberOfFreeChunks(dev) /
- (sb->s_blocksize / dev->nDataBytesPerChunk);
- } else {
- buf->f_blocks =
- (dev->param.endBlock - dev->param.startBlock + 1) *
- dev->param.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 void yaffs_FlushInodes(struct super_block *sb)
-{
- struct inode *iptr;
- yaffs_Object *obj;
-
- list_for_each_entry(iptr,&sb->s_inodes, i_sb_list){
- obj = yaffs_InodeToObject(iptr);
- if(obj){
- T(YAFFS_TRACE_OS, (TSTR("flushing obj %d\n"),
- obj->objectId));
- yaffs_FlushFile(obj,1,0);
- }
- }
-}
-
-
-static void yaffs_FlushSuperBlock(struct super_block *sb, int do_checkpoint)
-{
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
- if(!dev)
- return;
-
- yaffs_FlushInodes(sb);
- yaffs_UpdateDirtyDirectories(dev);
- yaffs_FlushEntireDeviceCache(dev);
- if(do_checkpoint)
- yaffs_CheckpointSave(dev);
-}
-
-
-static unsigned yaffs_bg_gc_urgency(yaffs_Device *dev)
-{
- unsigned erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
- struct yaffs_LinuxContext *context = yaffs_DeviceToLC(dev);
- unsigned scatteredFree = 0; /* Free chunks not in an erased block */
-
- if(erasedChunks < dev->nFreeChunks)
- scatteredFree = (dev->nFreeChunks - erasedChunks);
-
- if(!context->bgRunning)
- return 0;
- else if(scatteredFree < (dev->param.nChunksPerBlock * 2))
- return 0;
- else if(erasedChunks > dev->nFreeChunks/2)
- return 0;
- else if(erasedChunks > dev->nFreeChunks/4)
- return 1;
- else
- return 2;
-}
-
-static int yaffs_do_sync_fs(struct super_block *sb,
- int request_checkpoint)
-{
-
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
- unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4);
- unsigned gc_urgent = yaffs_bg_gc_urgency(dev);
- int do_checkpoint;
-
- T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
- (TSTR("yaffs_do_sync_fs: gc-urgency %d %s %s%s\n"),
- gc_urgent,
- sb->s_dirt ? "dirty" : "clean",
- request_checkpoint ? "checkpoint requested" : "no checkpoint",
- oneshot_checkpoint ? " one-shot" : "" ));
-
- yaffs_GrossLock(dev);
- do_checkpoint = ((request_checkpoint && !gc_urgent) ||
- oneshot_checkpoint) &&
- !dev->isCheckpointed;
-
- if (sb->s_dirt || do_checkpoint) {
- yaffs_FlushSuperBlock(sb, !dev->isCheckpointed && do_checkpoint);
- sb->s_dirt = 0;
- if(oneshot_checkpoint)
- yaffs_auto_checkpoint &= ~4;
- }
- yaffs_GrossUnlock(dev);
-
- return 0;
-}
-
-/*
- * yaffs background thread functions .
- * yaffs_BackgroundThread() the thread function
- * yaffs_BackgroundStart() launches the background thread.
- * yaffs_BackgroundStop() cleans up the background thread.
- *
- * NB:
- * The thread should only run after the yaffs is initialised
- * The thread should be stopped before yaffs is unmounted.
- * The thread should not do any writing while the fs is in read only.
- */
-
-#ifdef YAFFS_COMPILE_BACKGROUND
-
-void yaffs_background_waker(unsigned long data)
-{
- wake_up_process((struct task_struct *)data);
-}
-
-static int yaffs_BackgroundThread(void *data)
-{
- yaffs_Device *dev = (yaffs_Device *)data;
- struct yaffs_LinuxContext *context = yaffs_DeviceToLC(dev);
- unsigned long now = jiffies;
- unsigned long next_dir_update = now;
- unsigned long next_gc = now;
- unsigned long expires;
- unsigned int urgency;
-
- int gcResult;
- struct timer_list timer;
-
- T(YAFFS_TRACE_BACKGROUND,
- (TSTR("yaffs_background starting for dev %p\n"),
- (void *)dev));
-
-#ifdef YAFFS_COMPILE_FREEZER
- set_freezable();
-#endif
- while(context->bgRunning){
- T(YAFFS_TRACE_BACKGROUND,
- (TSTR("yaffs_background\n")));
-
- if(kthread_should_stop())
- break;
-
-#ifdef YAFFS_COMPILE_FREEZER
- if(try_to_freeze())
- continue;
-#endif
- yaffs_GrossLock(dev);
-
- now = jiffies;
-
- if(time_after(now, next_dir_update) && yaffs_bg_enable){
- yaffs_UpdateDirtyDirectories(dev);
- next_dir_update = now + HZ;
- }
-
- if(time_after(now,next_gc) && yaffs_bg_enable){
- if(!dev->isCheckpointed){
- urgency = yaffs_bg_gc_urgency(dev);
- gcResult = yaffs_BackgroundGarbageCollect(dev, urgency);
- if(urgency > 1)
- next_gc = now + HZ/20+1;
- else if(urgency > 0)
- next_gc = now + HZ/10+1;
- else
- next_gc = now + HZ * 2;
- } else /*
- * gc not running so set to next_dir_update
- * to cut down on wake ups
- */
- next_gc = next_dir_update;
- }
- yaffs_GrossUnlock(dev);
-#if 1
- expires = next_dir_update;
- if (time_before(next_gc,expires))
- expires = next_gc;
- if(time_before(expires,now))
- expires = now + HZ;
-
- Y_INIT_TIMER(&timer);
- timer.expires = expires+1;
- timer.data = (unsigned long) current;
- timer.function = yaffs_background_waker;
-
- set_current_state(TASK_INTERRUPTIBLE);
- add_timer(&timer);
- schedule();
- del_timer_sync(&timer);
-#else
- msleep(10);
-#endif
- }
-
- return 0;
-}
-
-static int yaffs_BackgroundStart(yaffs_Device *dev)
-{
- int retval = 0;
- struct yaffs_LinuxContext *context = yaffs_DeviceToLC(dev);
-
- if(dev->readOnly)
- return -1;
-
- context->bgRunning = 1;
-
- context->bgThread = kthread_run(yaffs_BackgroundThread,
- (void *)dev,"yaffs-bg-%d",context->mount_id);
-
- if(IS_ERR(context->bgThread)){
- retval = PTR_ERR(context->bgThread);
- context->bgThread = NULL;
- context->bgRunning = 0;
- }
- return retval;
-}
-
-static void yaffs_BackgroundStop(yaffs_Device *dev)
-{
- struct yaffs_LinuxContext *ctxt = yaffs_DeviceToLC(dev);
-
- ctxt->bgRunning = 0;
-
- if( ctxt->bgThread){
- kthread_stop(ctxt->bgThread);
- ctxt->bgThread = NULL;
- }
-}
-#else
-static int yaffs_BackgroundThread(void *data)
-{
- return 0;
-}
-
-static int yaffs_BackgroundStart(yaffs_Device *dev)
-{
- return 0;
-}
-
-static void yaffs_BackgroundStop(yaffs_Device *dev)
-{
-}
-#endif
-
-
-#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
-{
- unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2);
-
- T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND,
- (TSTR("yaffs_write_super%s\n"),
- request_checkpoint ? " checkpt" : ""));
-
- yaffs_do_sync_fs(sb, request_checkpoint);
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18))
- return 0;
-#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
-{
- unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1);
-
- T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
- (TSTR("yaffs_sync_fs%s\n"),
- request_checkpoint ? " checkpt" : ""));
-
- yaffs_do_sync_fs(sb, request_checkpoint);
-
- return 0;
-}
-
-#ifdef YAFFS_USE_OWN_IGET
-
-static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino)
-{
- struct inode *inode;
- yaffs_Object *obj;
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_iget for %lu\n"), ino));
-
- inode = iget_locked(sb, ino);
- if (!inode)
- return ERR_PTR(-ENOMEM);
- if (!(inode->i_state & I_NEW))
- return 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_GrossLock(dev);
-
- obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
-
- yaffs_FillInodeFromObject(inode, obj);
-
- yaffs_GrossUnlock(dev);
-
- unlock_new_inode(inode);
- return inode;
-}
-
-#else
-
-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,
- (TSTR("yaffs_read_inode for %d\n"), (int)inode->i_ino));
-
- if(current != yaffs_DeviceToLC(dev)->readdirProcess)
- yaffs_GrossLock(dev);
-
- obj = yaffs_FindObjectByNumber(dev, inode->i_ino);
-
- yaffs_FillInodeFromObject(inode, obj);
-
- if(current != yaffs_DeviceToLC(dev)->readdirProcess)
- yaffs_GrossUnlock(dev);
-}
-
-#endif
-
-static YLIST_HEAD(yaffs_context_list);
-struct semaphore yaffs_context_lock;
-
-static void yaffs_put_super(struct super_block *sb)
-{
- yaffs_Device *dev = yaffs_SuperToDevice(sb);
-
- T(YAFFS_TRACE_OS, (TSTR("yaffs_put_super\n")));
-
- T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
- (TSTR("Shutting down yaffs background thread\n")));
- yaffs_BackgroundStop(dev);
- T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
- (TSTR("yaffs background thread shut down\n")));
-
- yaffs_GrossLock(dev);
-
- yaffs_FlushSuperBlock(sb,1);
-
- if (yaffs_DeviceToLC(dev)->putSuperFunc)
- yaffs_DeviceToLC(dev)->putSuperFunc(sb);
-
-
- yaffs_Deinitialise(dev);
-
- yaffs_GrossUnlock(dev);
-
- down(&yaffs_context_lock);
- ylist_del_init(&(yaffs_DeviceToLC(dev)->contextList));
- up(&yaffs_context_lock);
-
- if (yaffs_DeviceToLC(dev)->spareBuffer) {
- YFREE(yaffs_DeviceToLC(dev)->spareBuffer);
- yaffs_DeviceToLC(dev)->spareBuffer = NULL;
- }
-
- kfree(dev);
-}
-
-
-static void yaffs_MTDPutSuper(struct super_block *sb)
-{
- struct mtd_info *mtd = yaffs_DeviceToMtd(yaffs_SuperToDevice(sb));
-
- if (mtd->sync)
- mtd->sync(mtd);
-
- put_mtd_device(mtd);
-}
-
-
-static void yaffs_MarkSuperBlockDirty(yaffs_Device *dev)
-{
- struct super_block *sb = yaffs_DeviceToLC(dev)->superBlock;
-
- T(YAFFS_TRACE_OS, (TSTR("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;
- int tags_ecc_on;
- int tags_ecc_overridden;
- int lazy_loading_enabled;
- int lazy_loading_overridden;
- int empty_lost_and_found;
- int empty_lost_and_found_overridden;
-} yaffs_options;
-
-#define MAX_OPT_LEN 30
-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++;
-
- 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, "tags-ecc-off")){
- options->tags_ecc_on = 0;
- options->tags_ecc_overridden=1;
- } else if (!strcmp(cur_opt, "tags-ecc-on")){
- options->tags_ecc_on = 1;
- options->tags_ecc_overridden = 1;
- } else if (!strcmp(cur_opt, "lazy-loading-off")){
- options->lazy_loading_enabled = 0;
- options->lazy_loading_overridden=1;
- } else if (!strcmp(cur_opt, "lazy-loading-on")){
- options->lazy_loading_enabled = 1;
- options->lazy_loading_overridden = 1;
- } else if (!strcmp(cur_opt, "empty-lost-and-found-off")){
- options->empty_lost_and_found = 0;
- options->empty_lost_and_found_overridden=1;
- } else if (!strcmp(cur_opt, "empty-lost-and-found-on")){
- options->empty_lost_and_found = 1;
- options->empty_lost_and_found_overridden=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;
- struct yaffs_LinuxContext *context = NULL;
- yaffs_DeviceParam *param;
-
- int readOnly = 0;
-
- yaffs_options options;
-
- unsigned mount_id;
- int found;
- struct yaffs_LinuxContext *context_iterator;
- struct ylist_head *l;
-
- sb->s_magic = YAFFS_MAGIC;
- sb->s_op = &yaffs_super_ops;
- sb->s_flags |= MS_NOATIME;
-
- readOnly =((sb->s_flags & MS_RDONLY) != 0);
-
-
-#ifdef YAFFS_COMPILE_EXPORTFS
- sb->s_export_op = &yaffs_export_ops;
-#endif
-
- 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\" %s\n",
- sb->s_dev,
- yaffs_devname(sb, devname_buf),
- readOnly ? "ro" : "rw");
-
- 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,
- (TSTR("yaffs_read_super: Using yaffs%d\n"), yaffsVersion));
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_read_super: block size %d\n"),
- (int)(sb->s_blocksize)));
-
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: Attempting MTD mount of %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,
- (TSTR("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,
- (TSTR("yaffs: MTD device is not NAND it's type %d\n"),
- mtd->type));
- return NULL;
- }
-
- T(YAFFS_TRACE_OS, (TSTR(" erase %p\n"), mtd->erase));
- T(YAFFS_TRACE_OS, (TSTR(" read %p\n"), mtd->read));
- T(YAFFS_TRACE_OS, (TSTR(" write %p\n"), mtd->write));
- T(YAFFS_TRACE_OS, (TSTR(" readoob %p\n"), mtd->read_oob));
- T(YAFFS_TRACE_OS, (TSTR(" writeoob %p\n"), mtd->write_oob));
- T(YAFFS_TRACE_OS, (TSTR(" block_isbad %p\n"), mtd->block_isbad));
- T(YAFFS_TRACE_OS, (TSTR(" block_markbad %p\n"), mtd->block_markbad));
- T(YAFFS_TRACE_OS, (TSTR(" %s %d\n"), WRITE_SIZE_STR, WRITE_SIZE(mtd)));
- T(YAFFS_TRACE_OS, (TSTR(" oobsize %d\n"), mtd->oobsize));
- T(YAFFS_TRACE_OS, (TSTR(" erasesize %d\n"), mtd->erasesize));
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29)
- T(YAFFS_TRACE_OS, (TSTR(" size %u\n"), mtd->size));
-#else
- T(YAFFS_TRACE_OS, (TSTR(" size %lld\n"), mtd->size));
-#endif
-
-#ifdef CONFIG_YAFFS_AUTO_YAFFS2
-
- if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs: auto selecting yaffs2\n")));
- yaffsVersion = 2;
- }
-
- /* Added NCB 26/5/2006 for completeness */
- if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("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,
- (TSTR("yaffs: MTD device does not support required "
- "functions\n")));
- return NULL;
- }
-
- if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE ||
- mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) &&
- !options.inband_tags) {
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("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,
- (TSTR("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,
- (TSTR("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 (!readOnly && !(mtd->flags & MTD_WRITEABLE)){
- readOnly = 1;
- printk(KERN_INFO "yaffs: mtd is read only, setting superblock read only");
- sb->s_flags |= MS_RDONLY;
- }
-
- dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL);
- context = kmalloc(sizeof(struct yaffs_LinuxContext),GFP_KERNEL);
-
- if(!dev || !context ){
- if(dev)
- kfree(dev);
- if(context)
- kfree(context);
- dev = NULL;
- context = NULL;
- }
-
- if (!dev) {
- /* Deep shit could not allocate device structure */
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs_read_super: Failed trying to allocate "
- "yaffs_Device. \n")));
- return NULL;
- }
- memset(dev, 0, sizeof(yaffs_Device));
- param = &(dev->param);
-
- memset(context,0,sizeof(struct yaffs_LinuxContext));
- dev->osContext = context;
- YINIT_LIST_HEAD(&(context->contextList));
- context->dev = dev;
- context->superBlock = sb;
-
- dev->readOnly = readOnly;
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
- sb->s_fs_info = dev;
-#else
- sb->u.generic_sbp = dev;
-#endif
-
- dev->driverContext = mtd;
- param->name = mtd->name;
-
- /* Set up the memory size parameters.... */
-
- nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
-
- param->startBlock = 0;
- param->endBlock = nBlocks - 1;
- param->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
- param->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
- param->nReservedBlocks = 5;
- param->nShortOpCaches = (options.no_cache) ? 0 : 10;
- param->inbandTags = options.inband_tags;
-
-#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
- param->disableLazyLoad = 1;
-#endif
-#ifdef CONFIG_YAFFS_XATTR
- param->enableXattr = 1;
-#endif
- if(options.lazy_loading_overridden)
- param->disableLazyLoad = !options.lazy_loading_enabled;
-
-#ifdef CONFIG_YAFFS_DISABLE_TAGS_ECC
- param->noTagsECC = 1;
-#endif
-
-#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND
-#else
- param->deferDirectoryUpdate = 1;
-#endif
-
- if(options.tags_ecc_overridden)
- param->noTagsECC = !options.tags_ecc_on;
-
-#ifdef CONFIG_YAFFS_EMPTY_LOST_AND_FOUND
- param->emptyLostAndFound = 1;
-#endif
-
-#ifdef CONFIG_YAFFS_DISABLE_BLOCK_REFRESHING
- param->refreshPeriod = 0;
-#else
- param->refreshPeriod = 500;
-#endif
-
- if(options.empty_lost_and_found_overridden)
- param->emptyLostAndFound = options.empty_lost_and_found;
-
- /* ... and the functions. */
- if (yaffsVersion == 2) {
- param->writeChunkWithTagsToNAND =
- nandmtd2_WriteChunkWithTagsToNAND;
- param->readChunkWithTagsFromNAND =
- nandmtd2_ReadChunkWithTagsFromNAND;
- param->markNANDBlockBad = nandmtd2_MarkNANDBlockBad;
- param->queryNANDBlock = nandmtd2_QueryNANDBlock;
- yaffs_DeviceToLC(dev)->spareBuffer = YMALLOC(mtd->oobsize);
- param->isYaffs2 = 1;
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- param->totalBytesPerChunk = mtd->writesize;
- param->nChunksPerBlock = mtd->erasesize / mtd->writesize;
-#else
- param->totalBytesPerChunk = mtd->oobblock;
- param->nChunksPerBlock = mtd->erasesize / mtd->oobblock;
-#endif
- nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
-
- param->startBlock = 0;
- param->endBlock = nBlocks - 1;
- } else {
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
- /* use the MTD interface in yaffs_mtdif1.c */
- param->writeChunkWithTagsToNAND =
- nandmtd1_WriteChunkWithTagsToNAND;
- param->readChunkWithTagsFromNAND =
- nandmtd1_ReadChunkWithTagsFromNAND;
- param->markNANDBlockBad = nandmtd1_MarkNANDBlockBad;
- param->queryNANDBlock = nandmtd1_QueryNANDBlock;
-#else
- param->writeChunkToNAND = nandmtd_WriteChunkToNAND;
- param->readChunkFromNAND = nandmtd_ReadChunkFromNAND;
-#endif
- param->isYaffs2 = 0;
- }
- /* ... and common functions */
- param->eraseBlockInNAND = nandmtd_EraseBlockInNAND;
- param->initialiseNAND = nandmtd_InitialiseNAND;
-
- yaffs_DeviceToLC(dev)->putSuperFunc = yaffs_MTDPutSuper;
-
- param->markSuperBlockDirty = yaffs_MarkSuperBlockDirty;
- param->gcControl = yaffs_gc_control_callback;
-
- yaffs_DeviceToLC(dev)->superBlock= sb;
-
-
-#ifndef CONFIG_YAFFS_DOES_ECC
- param->useNANDECC = 1;
-#endif
-
-#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
- param->wideTnodesDisabled = 1;
-#endif
-
- param->skipCheckpointRead = options.skip_checkpoint_read;
- param->skipCheckpointWrite = options.skip_checkpoint_write;
-
- down(&yaffs_context_lock);
- /* Get a mount id */
- found = 0;
- for(mount_id=0; ! found; mount_id++){
- found = 1;
- ylist_for_each(l,&yaffs_context_list){
- context_iterator = ylist_entry(l,struct yaffs_LinuxContext,contextList);
- if(context_iterator->mount_id == mount_id)
- found = 0;
- }
- }
- context->mount_id = mount_id;
-
- ylist_add_tail(&(yaffs_DeviceToLC(dev)->contextList), &yaffs_context_list);
- up(&yaffs_context_lock);
-
- /* Directory search handling...*/
- YINIT_LIST_HEAD(&(yaffs_DeviceToLC(dev)->searchContexts));
- param->removeObjectCallback = yaffs_RemoveObjectCallback;
-
- init_MUTEX(&(yaffs_DeviceToLC(dev)->grossLock));
-
- yaffs_GrossLock(dev);
-
- err = yaffs_GutsInitialise(dev);
-
- T(YAFFS_TRACE_OS,
- (TSTR("yaffs_read_super: guts initialised %s\n"),
- (err == YAFFS_OK) ? "OK" : "FAILED"));
-
- if(err == YAFFS_OK)
- yaffs_BackgroundStart(dev);
-
- if(!context->bgThread)
- param->deferDirectoryUpdate = 0;
-
-
- /* 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, (TSTR("yaffs_read_super: got root inode\n")));
-
- root = d_alloc_root(inode);
-
- T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: d_alloc_root done\n")));
-
- if (!root) {
- iput(inode);
- return NULL;
- }
- sb->s_root = root;
- sb->s_dirt = !dev->isCheckpointed;
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs_read_super: isCheckpointed %d\n"),
- dev->isCheckpointed));
-
- T(YAFFS_TRACE_OS, (TSTR("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 struct proc_dir_entry *debug_proc_entry;
-
-static char *yaffs_dump_dev_part0(char *buf, yaffs_Device * dev)
-{
- buf += sprintf(buf, "startBlock......... %d\n", dev->param.startBlock);
- buf += sprintf(buf, "endBlock........... %d\n", dev->param.endBlock);
- buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->param.totalBytesPerChunk);
- buf += sprintf(buf, "useNANDECC......... %d\n", dev->param.useNANDECC);
- buf += sprintf(buf, "noTagsECC.......... %d\n", dev->param.noTagsECC);
- buf += sprintf(buf, "isYaffs2........... %d\n", dev->param.isYaffs2);
- buf += sprintf(buf, "inbandTags......... %d\n", dev->param.inbandTags);
- buf += sprintf(buf, "emptyLostAndFound.. %d\n", dev->param.emptyLostAndFound);
- buf += sprintf(buf, "disableLazyLoad.... %d\n", dev->param.disableLazyLoad);
- buf += sprintf(buf, "refreshPeriod...... %d\n", dev->param.refreshPeriod);
- buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->param.nShortOpCaches);
- buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->param.nReservedBlocks);
-
- buf += sprintf(buf, "\n");
-
- return buf;
-}
-
-
-static char *yaffs_dump_dev_part1(char *buf, yaffs_Device * dev)
-{
- 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, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint);
- buf += sprintf(buf, "\n");
- buf += sprintf(buf, "nTnodes............ %d\n", dev->nTnodes);
- buf += sprintf(buf, "nObjects........... %d\n", dev->nObjects);
- buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks);
- buf += sprintf(buf, "\n");
- buf += sprintf(buf, "nPageWrites........ %u\n", dev->nPageWrites);
- buf += sprintf(buf, "nPageReads......... %u\n", dev->nPageReads);
- buf += sprintf(buf, "nBlockErasures..... %u\n", dev->nBlockErasures);
- buf += sprintf(buf, "nGCCopies.......... %u\n", dev->nGCCopies);
- buf += sprintf(buf, "allGCs............. %u\n", dev->allGCs);
- buf += sprintf(buf, "passiveGCs......... %u\n", dev->passiveGCs);
- buf += sprintf(buf, "oldestDirtyGCs..... %u\n", dev->oldestDirtyGCs);
- buf += sprintf(buf, "nGCBlocks.......... %u\n", dev->nGCBlocks);
- buf += sprintf(buf, "backgroundGCs...... %u\n", dev->backgroundGCs);
- buf += sprintf(buf, "nRetriedWrites..... %u\n", dev->nRetriedWrites);
- buf += sprintf(buf, "nRetireBlocks...... %u\n", dev->nRetiredBlocks);
- buf += sprintf(buf, "eccFixed........... %u\n", dev->eccFixed);
- buf += sprintf(buf, "eccUnfixed......... %u\n", dev->eccUnfixed);
- buf += sprintf(buf, "tagsEccFixed....... %u\n", dev->tagsEccFixed);
- buf += sprintf(buf, "tagsEccUnfixed..... %u\n", dev->tagsEccUnfixed);
- buf += sprintf(buf, "cacheHits.......... %u\n", dev->cacheHits);
- buf += sprintf(buf, "nDeletedFiles...... %u\n", dev->nDeletedFiles);
- buf += sprintf(buf, "nUnlinkedFiles..... %u\n", dev->nUnlinkedFiles);
- buf += sprintf(buf, "refreshCount....... %u\n", dev->refreshCount);
- buf +=
- sprintf(buf, "nBackgroudDeletions %u\n", dev->nBackgroundDeletions);
-
- return buf;
-}
-
-static int yaffs_proc_read(char *page,
- char **start,
- off_t offset, int count, int *eof, void *data)
-{
- struct ylist_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");
- else if (step == 1)
- buf += sprintf(buf,"\n");
- else {
- step-=2;
-
- down(&yaffs_context_lock);
-
- /* Locate and print the Nth entry. Order N-squared but N is small. */
- ylist_for_each(item, &yaffs_context_list) {
- struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList);
- yaffs_Device *dev = dc->dev;
-
- if (n < (step & ~1)) {
- n+=2;
- continue;
- }
- if((step & 1)==0){
- buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->param.name);
- buf = yaffs_dump_dev_part0(buf, dev);
- } else
- buf = yaffs_dump_dev_part1(buf, dev);
-
- break;
- }
- up(&yaffs_context_lock);
- }
-
- return buf - page < count ? buf - page : count;
-}
-
-static int yaffs_stats_proc_read(char *page,
- char **start,
- off_t offset, int count, int *eof, void *data)
-{
- struct ylist_head *item;
- char *buf = page;
- int n = 0;
-
- down(&yaffs_context_lock);
-
- /* Locate and print the Nth entry. Order N-squared but N is small. */
- ylist_for_each(item, &yaffs_context_list) {
- struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList);
- yaffs_Device *dev = dc->dev;
-
- int erasedChunks;
-
- erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock;
-
- buf += sprintf(buf,"%d, %d, %d, %u, %u, %u, %u\n",
- n, dev->nFreeChunks, erasedChunks,
- dev->backgroundGCs, dev->oldestDirtyGCs,
- dev->nObjects, dev->nTnodes);
- }
- up(&yaffs_context_lock);
-
-
- 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},
- {"background", YAFFS_TRACE_BACKGROUND},
- {"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},
- {"lock", YAFFS_TRACE_LOCK},
- {"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},
- {"sync", YAFFS_TRACE_SYNC},
- {"write", YAFFS_TRACE_WRITE},
-
- {"verify", YAFFS_TRACE_VERIFY},
- {"verify_nand", YAFFS_TRACE_VERIFY_NAND},
- {"verify_full", YAFFS_TRACE_VERIFY_FULL},
- {"verify_all", YAFFS_TRACE_VERIFY_ALL},
-
- {"all", 0xffffffff},
- {"none", 0},
- {NULL, 0},
-};
-
-#define MAX_MASK_NAME_LENGTH 40
-static int yaffs_proc_write_trace_options(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(KERN_DEBUG "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(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name);
- }
- }
-
- return count;
-}
-
-
-static int yaffs_proc_write(struct file *file, const char *buf,
- unsigned long count, void *data)
-{
- return yaffs_proc_write_trace_options(file, buf, count, data);
-}
-
-/* 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[] = {
- {&yaffs_fs_type, 0},
- {&yaffs2_fs_type, 0},
- {NULL, 0}
-};
-
-static int __init init_yaffs_fs(void)
-{
- int error = 0;
- struct file_system_to_install *fsinst;
-
- T(YAFFS_TRACE_ALWAYS,
- (TSTR("yaffs built " __DATE__ " " __TIME__ " Installing. \n")));
-
-#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED
- T(YAFFS_TRACE_ALWAYS,
- (TSTR(" \n\n\n\nYAFFS-WARNING CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED selected.\n\n\n\n")));
-#endif
-
-
-
-
- init_MUTEX(&yaffs_context_lock);
-
- /* Install the proc_fs entries */
- my_proc_entry = create_proc_entry("yaffs",
- S_IRUGO | S_IFREG,
- YPROC_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;
-
- debug_proc_entry = create_proc_entry("yaffs_stats",
- S_IRUGO | S_IFREG,
- YPROC_ROOT);
-
- if (debug_proc_entry) {
- debug_proc_entry->write_proc = NULL;
- debug_proc_entry->read_proc = yaffs_stats_proc_read;
- debug_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,
- (TSTR("yaffs built " __DATE__ " " __TIME__ " removing. \n")));
-
- remove_proc_entry("yaffs", YPROC_ROOT);
- remove_proc_entry("yaffs_stats", YPROC_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., 2002-2010");
-MODULE_LICENSE("GPL");
projects / yaffs2.git / blobdiff