2300 lines
56 KiB
C
2300 lines
56 KiB
C
/*
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* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2007 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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* Acknowledgements:
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* Luc van OostenRyck for numerous patches.
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* Nick Bane for numerous patches.
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* Nick Bane for 2.5/2.6 integration.
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* Andras Toth for mknod rdev issue.
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* Michael Fischer for finding the problem with inode inconsistency.
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* Some code bodily lifted from JFFS
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/*
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*
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* This is the file system front-end to YAFFS that hooks it up to
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* the VFS.
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*
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* Special notes:
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* >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with
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* this superblock
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* >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this
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* superblock
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* >> inode->u.generic_ip points to the associated yaffs_Object.
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*/
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const char *yaffs_fs_c_version =
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"$Id: yaffs_fs.c,v 1.63 2007-09-19 20:35:40 imcd Exp $";
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extern const char *yaffs_guts_c_version;
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#include <linux/version.h>
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
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#include <linux/config.h>
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#endif
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/fs.h>
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#include <linux/proc_fs.h>
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#include <linux/smp_lock.h>
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#include <linux/pagemap.h>
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#include <linux/mtd/mtd.h>
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#include <linux/interrupt.h>
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#include <linux/string.h>
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#include <linux/ctype.h>
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
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#include <linux/statfs.h> /* Added NCB 15-8-2003 */
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#include <asm/statfs.h>
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#define UnlockPage(p) unlock_page(p)
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#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags)
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/* FIXME: use sb->s_id instead ? */
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#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf)
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#else
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#include <linux/locks.h>
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#define BDEVNAME_SIZE 0
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#define yaffs_devname(sb, buf) kdevname(sb->s_dev)
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
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/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */
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#define __user
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#endif
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#endif
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
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#define WRITE_SIZE_STR "writesize"
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#define WRITE_SIZE(mtd) (mtd)->writesize
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#else
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#define WRITE_SIZE_STR "oobblock"
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#define WRITE_SIZE(mtd) (mtd)->oobblock
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#endif
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#include <asm/uaccess.h>
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#include "yportenv.h"
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#include "yaffs_guts.h"
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#include <linux/mtd/mtd.h>
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#include "yaffs_mtdif.h"
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#include "yaffs_mtdif1.h"
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#include "yaffs_mtdif2.h"
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unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS;
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unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
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/* Module Parameters */
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
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module_param(yaffs_traceMask,uint,0644);
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module_param(yaffs_wr_attempts,uint,0644);
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#else
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MODULE_PARM(yaffs_traceMask,"i");
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MODULE_PARM(yaffs_wr_attempts,"i");
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#endif
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/*#define T(x) printk x */
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
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#define yaffs_InodeToObjectLV(iptr) (iptr)->i_private
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#else
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#define yaffs_InodeToObjectLV(iptr) (iptr)->u.generic_ip
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#endif
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#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr)))
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#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode)
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
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#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info)
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#else
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#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp)
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#endif
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static void yaffs_put_super(struct super_block *sb);
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static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
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loff_t * pos);
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
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static int yaffs_file_flush(struct file *file, fl_owner_t id);
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#else
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static int yaffs_file_flush(struct file *file);
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#endif
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static int yaffs_sync_object(struct file *file, struct dentry *dentry,
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int datasync);
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static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir);
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
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static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode,
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struct nameidata *n);
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static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
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struct nameidata *n);
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#else
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static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode);
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static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry);
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#endif
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static int yaffs_link(struct dentry *old_dentry, struct inode *dir,
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struct dentry *dentry);
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static int yaffs_unlink(struct inode *dir, struct dentry *dentry);
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static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
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const char *symname);
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static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
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static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
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dev_t dev);
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#else
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static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode,
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int dev);
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#endif
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static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
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struct inode *new_dir, struct dentry *new_dentry);
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static int yaffs_setattr(struct dentry *dentry, struct iattr *attr);
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
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static int yaffs_sync_fs(struct super_block *sb, int wait);
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static void yaffs_write_super(struct super_block *sb);
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#else
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static int yaffs_sync_fs(struct super_block *sb);
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static int yaffs_write_super(struct super_block *sb);
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#endif
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
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static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf);
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#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
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static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
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#else
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static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
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#endif
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static void yaffs_read_inode(struct inode *inode);
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static void yaffs_put_inode(struct inode *inode);
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static void yaffs_delete_inode(struct inode *);
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static void yaffs_clear_inode(struct inode *);
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static int yaffs_readpage(struct file *file, struct page *page);
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
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static int yaffs_writepage(struct page *page, struct writeback_control *wbc);
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#else
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static int yaffs_writepage(struct page *page);
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#endif
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static int yaffs_prepare_write(struct file *f, struct page *pg,
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unsigned offset, unsigned to);
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static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
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unsigned to);
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static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
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int buflen);
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
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static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
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#else
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static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd);
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#endif
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static struct address_space_operations yaffs_file_address_operations = {
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.readpage = yaffs_readpage,
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.writepage = yaffs_writepage,
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.prepare_write = yaffs_prepare_write,
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.commit_write = yaffs_commit_write,
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};
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22))
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static struct file_operations yaffs_file_operations = {
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.read = do_sync_read,
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.write = do_sync_write,
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.aio_read = generic_file_aio_read,
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.aio_write = generic_file_aio_write,
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.mmap = generic_file_mmap,
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.flush = yaffs_file_flush,
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.fsync = yaffs_sync_object,
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.splice_read = generic_file_splice_read,
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.splice_write = generic_file_splice_write,
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};
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#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,18))
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static struct file_operations yaffs_file_operations = {
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.read = do_sync_read,
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.write = do_sync_write,
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.aio_read = generic_file_aio_read,
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.aio_write = generic_file_aio_write,
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.mmap = generic_file_mmap,
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.flush = yaffs_file_flush,
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.fsync = yaffs_sync_object,
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.sendfile = generic_file_sendfile,
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};
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#else
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static struct file_operations yaffs_file_operations = {
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.read = generic_file_read,
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.write = generic_file_write,
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.mmap = generic_file_mmap,
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.flush = yaffs_file_flush,
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.fsync = yaffs_sync_object,
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
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.sendfile = generic_file_sendfile,
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#endif
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};
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#endif
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static struct inode_operations yaffs_file_inode_operations = {
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.setattr = yaffs_setattr,
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};
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static struct inode_operations yaffs_symlink_inode_operations = {
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.readlink = yaffs_readlink,
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.follow_link = yaffs_follow_link,
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.setattr = yaffs_setattr,
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};
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static struct inode_operations yaffs_dir_inode_operations = {
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.create = yaffs_create,
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.lookup = yaffs_lookup,
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.link = yaffs_link,
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.unlink = yaffs_unlink,
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.symlink = yaffs_symlink,
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.mkdir = yaffs_mkdir,
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.rmdir = yaffs_unlink,
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.mknod = yaffs_mknod,
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.rename = yaffs_rename,
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.setattr = yaffs_setattr,
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};
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static struct file_operations yaffs_dir_operations = {
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.read = generic_read_dir,
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.readdir = yaffs_readdir,
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.fsync = yaffs_sync_object,
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};
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static struct super_operations yaffs_super_ops = {
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.statfs = yaffs_statfs,
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.read_inode = yaffs_read_inode,
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.put_inode = yaffs_put_inode,
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.put_super = yaffs_put_super,
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.delete_inode = yaffs_delete_inode,
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.clear_inode = yaffs_clear_inode,
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.sync_fs = yaffs_sync_fs,
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.write_super = yaffs_write_super,
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};
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static void yaffs_GrossLock(yaffs_Device * dev)
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{
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T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs locking\n"));
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down(&dev->grossLock);
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}
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static void yaffs_GrossUnlock(yaffs_Device * dev)
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{
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T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs unlocking\n"));
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up(&dev->grossLock);
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}
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static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
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int buflen)
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{
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unsigned char *alias;
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int ret;
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yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
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yaffs_GrossLock(dev);
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alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
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yaffs_GrossUnlock(dev);
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if (!alias)
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return -ENOMEM;
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ret = vfs_readlink(dentry, buffer, buflen, alias);
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kfree(alias);
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return ret;
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}
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
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static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
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#else
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static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
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#endif
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{
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unsigned char *alias;
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int ret;
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yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev;
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yaffs_GrossLock(dev);
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alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry));
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yaffs_GrossUnlock(dev);
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if (!alias)
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{
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ret = -ENOMEM;
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goto out;
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}
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ret = vfs_follow_link(nd, alias);
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kfree(alias);
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out:
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
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return ERR_PTR (ret);
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#else
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return ret;
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#endif
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}
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struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev,
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yaffs_Object * obj);
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/*
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* Lookup is used to find objects in the fs
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*/
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
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static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry,
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struct nameidata *n)
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#else
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static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
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#endif
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{
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yaffs_Object *obj;
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struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
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yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev;
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yaffs_GrossLock(dev);
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T(YAFFS_TRACE_OS,
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(KERN_DEBUG "yaffs_lookup for %d:%s\n",
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yaffs_InodeToObject(dir)->objectId, dentry->d_name.name));
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obj =
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yaffs_FindObjectByName(yaffs_InodeToObject(dir),
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dentry->d_name.name);
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obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */
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/* Can't hold gross lock when calling yaffs_get_inode() */
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yaffs_GrossUnlock(dev);
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if (obj) {
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T(YAFFS_TRACE_OS,
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(KERN_DEBUG "yaffs_lookup found %d\n", obj->objectId));
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inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj);
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if (inode) {
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T(YAFFS_TRACE_OS,
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(KERN_DEBUG "yaffs_loookup dentry \n"));
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/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to
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* d_add even if NULL inode */
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#if 0
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/*dget(dentry); // try to solve directory bug */
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d_add(dentry, inode);
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/* return dentry; */
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return NULL;
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#endif
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}
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} else {
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T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_lookup not found\n"));
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}
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/* added NCB for 2.5/6 compatability - forces add even if inode is
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* NULL which creates dentry hash */
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d_add(dentry, inode);
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return NULL;
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/* return (ERR_PTR(-EIO)); */
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}
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|
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/* For now put inode is just for debugging
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* Put inode is called when the inode **structure** is put.
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*/
|
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static void yaffs_put_inode(struct inode *inode)
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{
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T(YAFFS_TRACE_OS,
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("yaffs_put_inode: ino %d, count %d\n", (int)inode->i_ino,
|
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atomic_read(&inode->i_count)));
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}
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|
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/* clear is called to tell the fs to release any per-inode data it holds */
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static void yaffs_clear_inode(struct inode *inode)
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{
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yaffs_Object *obj;
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yaffs_Device *dev;
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obj = yaffs_InodeToObject(inode);
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|
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T(YAFFS_TRACE_OS,
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("yaffs_clear_inode: ino %d, count %d %s\n", (int)inode->i_ino,
|
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atomic_read(&inode->i_count),
|
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obj ? "object exists" : "null object"));
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|
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if (obj) {
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dev = obj->myDev;
|
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yaffs_GrossLock(dev);
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|
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/* Clear the association between the inode and
|
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* the yaffs_Object.
|
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*/
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obj->myInode = NULL;
|
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yaffs_InodeToObjectLV(inode) = NULL;
|
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|
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/* If the object freeing was deferred, then the real
|
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* free happens now.
|
|
* This should fix the inode inconsistency problem.
|
|
*/
|
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|
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yaffs_HandleDeferedFree(obj);
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|
|
yaffs_GrossUnlock(dev);
|
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}
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|
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}
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|
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/* 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");
|