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git://projects.qi-hardware.com/openwrt-xburst.git
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34b60fad1a
Signed-off-by: Gabor Juhos <juhosg@openwrt.org> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34013 3c298f89-4303-0410-b956-a3cf2f4a3e73
3577 lines
87 KiB
C
3577 lines
87 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) 2002-2010 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_dev_t associated with
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* this superblock
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* >> 2.6: sb->s_fs_info points to the yaffs_dev_t associated with this
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* superblock
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* >> inode->u.generic_ip points to the associated yaffs_obj_t.
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*/
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/*
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* There are two variants of the VFS glue code. This variant should compile
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* for any version of Linux.
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*/
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#include <linux/version.h>
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#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10))
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#define YAFFS_COMPILE_BACKGROUND
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#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6, 23))
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#define YAFFS_COMPILE_FREEZER
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#endif
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#endif
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#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
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#define YAFFS_COMPILE_EXPORTFS
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#endif
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35))
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#define YAFFS_USE_SETATTR_COPY
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#define YAFFS_USE_TRUNCATE_SETSIZE
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#endif
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,35))
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#define YAFFS_HAS_EVICT_INODE
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#endif
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13))
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#define YAFFS_NEW_FOLLOW_LINK 1
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#else
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#define YAFFS_NEW_FOLLOW_LINK 0
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#endif
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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/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 (YAFFS_NEW_FOLLOW_LINK == 1)
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#include <linux/namei.h>
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#endif
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#ifdef YAFFS_COMPILE_EXPORTFS
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#include <linux/exportfs.h>
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#endif
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#ifdef YAFFS_COMPILE_BACKGROUND
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#include <linux/kthread.h>
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#include <linux/delay.h>
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#endif
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#ifdef YAFFS_COMPILE_FREEZER
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#include <linux/freezer.h>
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#endif
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#include <asm/div64.h>
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
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#include <linux/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, 26))
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#define YPROC_ROOT (&proc_root)
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#else
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#define YPROC_ROOT NULL
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#endif
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26))
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#define Y_INIT_TIMER(a) init_timer(a)
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#else
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#define Y_INIT_TIMER(a) init_timer_on_stack(a)
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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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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27))
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#define YAFFS_USE_WRITE_BEGIN_END 1
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#else
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#define YAFFS_USE_WRITE_BEGIN_END 0
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#endif
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28))
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static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size)
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{
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uint64_t result = partition_size;
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do_div(result, block_size);
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return (uint32_t)result;
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}
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#else
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#define YCALCBLOCKS(s, b) ((s)/(b))
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#endif
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#include <linux/uaccess.h>
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#include <linux/mtd/mtd.h>
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#include "yportenv.h"
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#include "yaffs_trace.h"
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#include "yaffs_guts.h"
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#include "yaffs_linux.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_trace_mask = YAFFS_TRACE_BAD_BLOCKS | YAFFS_TRACE_ALWAYS;
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unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS;
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unsigned int yaffs_auto_checkpoint = 1;
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unsigned int yaffs_gc_control = 1;
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unsigned int yaffs_bg_enable = 1;
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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_trace_mask, uint, 0644);
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module_param(yaffs_wr_attempts, uint, 0644);
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module_param(yaffs_auto_checkpoint, uint, 0644);
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module_param(yaffs_gc_control, uint, 0644);
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module_param(yaffs_bg_enable, uint, 0644);
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#else
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MODULE_PARM(yaffs_trace_mask, "i");
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MODULE_PARM(yaffs_wr_attempts, "i");
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MODULE_PARM(yaffs_auto_checkpoint, "i");
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MODULE_PARM(yaffs_gc_control, "i");
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#endif
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25))
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/* use iget and read_inode */
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#define Y_IGET(sb, inum) iget((sb), (inum))
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static void yaffs_read_inode(struct inode *inode);
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#else
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/* Call local equivalent */
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#define YAFFS_USE_OWN_IGET
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#define Y_IGET(sb, inum) yaffs_iget((sb), (inum))
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static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino);
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#endif
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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_obj_t *)(yaffs_InodeToObjectLV(iptr)))
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#define yaffs_dentry_to_obj(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_dev_t *)sb->s_fs_info)
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#else
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#define yaffs_SuperToDevice(sb) ((yaffs_dev_t *)sb->u.generic_sbp)
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#endif
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#define update_dir_time(dir) do {\
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(dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
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} while(0)
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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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static ssize_t yaffs_hold_space(struct file *f);
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static void yaffs_release_space(struct file *f);
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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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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
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static int yaffs_sync_object(struct file *file, int datasync);
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#else
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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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#endif
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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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#ifdef YAFFS_HAS_PUT_INODE
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static void yaffs_put_inode(struct inode *inode);
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#endif
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#ifdef YAFFS_HAS_EVICT_INODE
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static void yaffs_evict_inode(struct inode *);
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#else
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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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#endif
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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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#ifdef CONFIG_YAFFS_XATTR
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int yaffs_setxattr(struct dentry *dentry, const char *name,
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const void *value, size_t size, int flags);
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ssize_t yaffs_getxattr(struct dentry *dentry, const char *name, void *buff,
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size_t size);
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int yaffs_removexattr(struct dentry *dentry, const char *name);
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ssize_t yaffs_listxattr(struct dentry *dentry, char *buff, size_t size);
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#endif
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#if (YAFFS_USE_WRITE_BEGIN_END != 0)
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static int yaffs_write_begin(struct file *filp, struct address_space *mapping,
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loff_t pos, unsigned len, unsigned flags,
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struct page **pagep, void **fsdata);
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static int yaffs_write_end(struct file *filp, struct address_space *mapping,
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loff_t pos, unsigned len, unsigned copied,
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struct page *pg, void *fsdadata);
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#else
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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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#endif
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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 (YAFFS_NEW_FOLLOW_LINK == 1)
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void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias);
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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 void yaffs_touch_super(yaffs_dev_t *dev);
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static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin);
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static int yaffs_vfs_setattr(struct inode *, struct iattr *);
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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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#if (YAFFS_USE_WRITE_BEGIN_END > 0)
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.write_begin = yaffs_write_begin,
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.write_end = yaffs_write_end,
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#else
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.prepare_write = yaffs_prepare_write,
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.commit_write = yaffs_commit_write,
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#endif
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};
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
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static const 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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.llseek = generic_file_llseek,
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};
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#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18))
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static const 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 const 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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#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25))
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static void zero_user_segment(struct page *page, unsigned start, unsigned end)
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{
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void * kaddr = kmap_atomic(page, KM_USER0);
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memset(kaddr + start, 0, end - start);
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kunmap_atomic(kaddr, KM_USER0);
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flush_dcache_page(page);
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}
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#endif
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static const struct inode_operations yaffs_file_inode_operations = {
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.setattr = yaffs_setattr,
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#ifdef CONFIG_YAFFS_XATTR
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.setxattr = yaffs_setxattr,
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.getxattr = yaffs_getxattr,
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.listxattr = yaffs_listxattr,
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.removexattr = yaffs_removexattr,
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#endif
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};
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static const 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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#if (YAFFS_NEW_FOLLOW_LINK == 1)
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.put_link = yaffs_put_link,
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#endif
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.setattr = yaffs_setattr,
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#ifdef CONFIG_YAFFS_XATTR
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.setxattr = yaffs_setxattr,
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.getxattr = yaffs_getxattr,
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.listxattr = yaffs_listxattr,
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.removexattr = yaffs_removexattr,
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#endif
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};
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static const 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,
|
|
.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_dev_t *dev)
|
|
{
|
|
return yaffs_gc_control;
|
|
}
|
|
|
|
static void yaffs_gross_lock(yaffs_dev_t *dev)
|
|
{
|
|
T(YAFFS_TRACE_LOCK, (TSTR("yaffs locking %p\n"), current));
|
|
down(&(yaffs_dev_to_lc(dev)->grossLock));
|
|
T(YAFFS_TRACE_LOCK, (TSTR("yaffs locked %p\n"), current));
|
|
}
|
|
|
|
static void yaffs_gross_unlock(yaffs_dev_t *dev)
|
|
{
|
|
T(YAFFS_TRACE_LOCK, (TSTR("yaffs unlocking %p\n"), current));
|
|
up(&(yaffs_dev_to_lc(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_obj_t *d_obj;
|
|
yaffs_obj_t *parent_obj;
|
|
|
|
d_obj = yaffs_InodeToObject(dentry->d_inode);
|
|
|
|
if (d_obj) {
|
|
parent_obj = d_obj->parent;
|
|
if (parent_obj) {
|
|
parent_ino = yaffs_get_obj_inode(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 remove_obj_fn 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_dev_t 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_dev_t *dev;
|
|
yaffs_obj_t *dirObj;
|
|
yaffs_obj_t *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_obj_t *dir)
|
|
{
|
|
yaffs_dev_t *dev = dir->my_dev;
|
|
struct yaffs_SearchContext *sc = YMALLOC(sizeof(struct yaffs_SearchContext));
|
|
if(sc){
|
|
sc->dirObj = dir;
|
|
sc->dev = dev;
|
|
if( ylist_empty(&sc->dirObj->variant.dir_variant.children))
|
|
sc->nextReturn = NULL;
|
|
else
|
|
sc->nextReturn = ylist_entry(
|
|
dir->variant.dir_variant.children.next,
|
|
yaffs_obj_t,siblings);
|
|
YINIT_LIST_HEAD(&sc->others);
|
|
ylist_add(&sc->others,&(yaffs_dev_to_lc(dev)->searchContexts));
|
|
}
|
|
return sc;
|
|
}
|
|
|
|
/*
|
|
* yaffs_search_end() disposes of a search context and cleans up.
|
|
*/
|
|
static void yaffs_search_end(struct yaffs_SearchContext * sc)
|
|
{
|
|
if(sc){
|
|
ylist_del(&sc->others);
|
|
YFREE(sc);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* yaffs_search_advance() 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_search_advance(struct yaffs_SearchContext *sc)
|
|
{
|
|
if(!sc)
|
|
return;
|
|
|
|
if( sc->nextReturn == NULL ||
|
|
ylist_empty(&sc->dirObj->variant.dir_variant.children))
|
|
sc->nextReturn = NULL;
|
|
else {
|
|
struct ylist_head *next = sc->nextReturn->siblings.next;
|
|
|
|
if( next == &sc->dirObj->variant.dir_variant.children)
|
|
sc->nextReturn = NULL; /* end of list */
|
|
else
|
|
sc->nextReturn = ylist_entry(next,yaffs_obj_t,siblings);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* yaffs_remove_obj_callback() 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_remove_obj_callback(yaffs_obj_t *obj)
|
|
{
|
|
|
|
struct ylist_head *i;
|
|
struct yaffs_SearchContext *sc;
|
|
struct ylist_head *search_contexts = &(yaffs_dev_to_lc(obj->my_dev)->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_search_advance(sc);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
/*-----------------------------------------------------------------*/
|
|
|
|
static int yaffs_readlink(struct dentry *dentry, char __user *buffer,
|
|
int buflen)
|
|
{
|
|
unsigned char *alias;
|
|
int ret;
|
|
|
|
yaffs_dev_t *dev = yaffs_dentry_to_obj(dentry)->my_dev;
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
|
|
|
|
yaffs_gross_unlock(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_dev_t *dev = yaffs_dentry_to_obj(dentry)->my_dev;
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
|
|
yaffs_gross_unlock(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_obj_t *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_obj_t *obj;
|
|
struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */
|
|
|
|
yaffs_dev_t *dev = yaffs_InodeToObject(dir)->my_dev;
|
|
|
|
if(current != yaffs_dev_to_lc(dev)->readdirProcess)
|
|
yaffs_gross_lock(dev);
|
|
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_lookup for %d:%s\n"),
|
|
yaffs_InodeToObject(dir)->obj_id, dentry->d_name.name));
|
|
|
|
obj = yaffs_find_by_name(yaffs_InodeToObject(dir),
|
|
dentry->d_name.name);
|
|
|
|
obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */
|
|
|
|
/* Can't hold gross lock when calling yaffs_get_inode() */
|
|
if(current != yaffs_dev_to_lc(dev)->readdirProcess)
|
|
yaffs_gross_unlock(dev);
|
|
|
|
if (obj) {
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_lookup found %d\n"), obj->obj_id));
|
|
|
|
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_unstitch_obj(struct inode *inode, yaffs_obj_t *obj)
|
|
{
|
|
/* Clear the association between the inode and
|
|
* the yaffs_obj_t.
|
|
*/
|
|
obj->my_inode = 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_handle_defered_free(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_obj_t *obj;
|
|
yaffs_dev_t *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->my_dev;
|
|
yaffs_gross_lock(dev);
|
|
yaffs_del_obj(obj);
|
|
yaffs_gross_unlock(dev);
|
|
}
|
|
if (obj) {
|
|
dev = obj->my_dev;
|
|
yaffs_gross_lock(dev);
|
|
yaffs_unstitch_obj(inode,obj);
|
|
yaffs_gross_unlock(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_obj_t *obj;
|
|
yaffs_dev_t *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->my_dev;
|
|
yaffs_gross_lock(dev);
|
|
yaffs_unstitch_obj(inode,obj);
|
|
yaffs_gross_unlock(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_obj_t *obj = yaffs_InodeToObject(inode);
|
|
yaffs_dev_t *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->my_dev;
|
|
yaffs_gross_lock(dev);
|
|
yaffs_del_obj(obj);
|
|
yaffs_gross_unlock(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_obj_t *obj = yaffs_dentry_to_obj(file->f_dentry);
|
|
|
|
yaffs_dev_t *dev = obj->my_dev;
|
|
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_file_flush object %d (%s)\n"), obj->obj_id,
|
|
obj->dirty ? "dirty" : "clean"));
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
yaffs_flush_file(obj, 1, 0);
|
|
|
|
yaffs_gross_unlock(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int yaffs_readpage_nolock(struct file *f, struct page *pg)
|
|
{
|
|
/* Lifted from jffs2 */
|
|
|
|
yaffs_obj_t *obj;
|
|
unsigned char *pg_buf;
|
|
int ret;
|
|
|
|
yaffs_dev_t *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_dentry_to_obj(f->f_dentry);
|
|
|
|
dev = obj->my_dev;
|
|
|
|
#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_gross_lock(dev);
|
|
|
|
ret = yaffs_file_rd(obj, pg_buf,
|
|
pg->index << PAGE_CACHE_SHIFT,
|
|
PAGE_CACHE_SIZE);
|
|
|
|
yaffs_gross_unlock(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_dev_t *dev;
|
|
struct address_space *mapping = page->mapping;
|
|
struct inode *inode;
|
|
unsigned long end_index;
|
|
char *buffer;
|
|
yaffs_obj_t *obj;
|
|
int nWritten = 0;
|
|
unsigned n_bytes;
|
|
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)
|
|
n_bytes = PAGE_CACHE_SIZE;
|
|
else {
|
|
n_bytes = i_size & (PAGE_CACHE_SIZE -1);
|
|
|
|
if (page->index > end_index || !n_bytes) {
|
|
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(n_bytes != PAGE_CACHE_SIZE)
|
|
zero_user_segment(page,n_bytes,PAGE_CACHE_SIZE);
|
|
|
|
get_page(page);
|
|
|
|
buffer = kmap(page);
|
|
|
|
obj = yaffs_InodeToObject(inode);
|
|
dev = obj->my_dev;
|
|
yaffs_gross_lock(dev);
|
|
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_writepage at %08x, size %08x\n"),
|
|
(unsigned)(page->index << PAGE_CACHE_SHIFT), n_bytes));
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("writepag0: obj = %05x, ino = %05x\n"),
|
|
(int)obj->variant.file_variant.file_size, (int)inode->i_size));
|
|
|
|
nWritten = yaffs_wr_file(obj, buffer,
|
|
page->index << PAGE_CACHE_SHIFT, n_bytes, 0);
|
|
|
|
yaffs_touch_super(dev);
|
|
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("writepag1: obj = %05x, ino = %05x\n"),
|
|
(int)obj->variant.file_variant.file_size, (int)inode->i_size));
|
|
|
|
yaffs_gross_unlock(dev);
|
|
|
|
kunmap(page);
|
|
set_page_writeback(page);
|
|
unlock_page(page);
|
|
end_page_writeback(page);
|
|
put_page(page);
|
|
|
|
return (nWritten == n_bytes) ? 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 n_bytes %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 n_bytes = 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 n_bytes %d\n"),
|
|
saddr, spos, n_bytes));
|
|
|
|
nWritten = yaffs_file_write(f, addr, n_bytes, &pos);
|
|
|
|
if (nWritten != n_bytes) {
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_commit_write not same size nWritten %d n_bytes %d\n"),
|
|
nWritten, n_bytes));
|
|
SetPageError(pg);
|
|
} else {
|
|
/* Nothing */
|
|
}
|
|
|
|
kunmap(pg);
|
|
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_commit_write returning %d\n"),
|
|
nWritten == n_bytes ? 0 : nWritten));
|
|
|
|
return nWritten == n_bytes ? 0 : nWritten;
|
|
}
|
|
#endif
|
|
|
|
|
|
static void yaffs_fill_inode_from_obj(struct inode *inode, yaffs_obj_t *obj)
|
|
{
|
|
if (inode && obj) {
|
|
|
|
|
|
/* Check mode against the variant type and attempt to repair if broken. */
|
|
__u32 mode = obj->yst_mode;
|
|
switch (obj->variant_type) {
|
|
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->obj_id;
|
|
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_get_obj_length(obj);
|
|
inode->i_blocks = (inode->i_size + 511) >> 9;
|
|
|
|
inode->i_nlink = yaffs_get_obj_link_count(obj);
|
|
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_fill_inode 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->my_inode = 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_obj_t *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->obj_id));
|
|
|
|
inode = Y_IGET(sb, obj->obj_id);
|
|
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_obj_t *obj;
|
|
int nWritten, ipos;
|
|
struct inode *inode;
|
|
yaffs_dev_t *dev;
|
|
|
|
obj = yaffs_dentry_to_obj(f->f_dentry);
|
|
|
|
dev = obj->my_dev;
|
|
|
|
yaffs_gross_lock(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->obj_id, ipos,ipos));
|
|
|
|
nWritten = yaffs_wr_file(obj, buf, ipos, n, 0);
|
|
|
|
yaffs_touch_super(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_gross_unlock(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_obj_t *obj;
|
|
yaffs_dev_t *dev;
|
|
|
|
int n_free_chunks;
|
|
|
|
|
|
obj = yaffs_dentry_to_obj(f->f_dentry);
|
|
|
|
dev = obj->my_dev;
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
n_free_chunks = yaffs_get_n_free_chunks(dev);
|
|
|
|
yaffs_gross_unlock(dev);
|
|
|
|
return (n_free_chunks > 20) ? 1 : 0;
|
|
}
|
|
|
|
static void yaffs_release_space(struct file *f)
|
|
{
|
|
yaffs_obj_t *obj;
|
|
yaffs_dev_t *dev;
|
|
|
|
|
|
obj = yaffs_dentry_to_obj(f->f_dentry);
|
|
|
|
dev = obj->my_dev;
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
|
|
yaffs_gross_unlock(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_obj_t *obj;
|
|
yaffs_dev_t *dev;
|
|
struct yaffs_SearchContext *sc;
|
|
struct inode *inode = f->f_dentry->d_inode;
|
|
unsigned long offset, curoffs;
|
|
yaffs_obj_t *l;
|
|
int retVal = 0;
|
|
|
|
char name[YAFFS_MAX_NAME_LENGTH + 1];
|
|
|
|
obj = yaffs_dentry_to_obj(f->f_dentry);
|
|
dev = obj->my_dev;
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
yaffs_dev_to_lc(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_gross_unlock(dev);
|
|
if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0){
|
|
yaffs_gross_lock(dev);
|
|
goto out;
|
|
}
|
|
yaffs_gross_lock(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_gross_unlock(dev);
|
|
if (filldir(dirent, "..", 2, offset,
|
|
f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0){
|
|
yaffs_gross_lock(dev);
|
|
goto out;
|
|
}
|
|
yaffs_gross_lock(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_get_obj_inode(l);
|
|
int this_type = yaffs_get_obj_type(l);
|
|
|
|
yaffs_get_obj_name(l, name,
|
|
YAFFS_MAX_NAME_LENGTH + 1);
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_readdir: %s inode %d\n"),
|
|
name, yaffs_get_obj_inode(l)));
|
|
|
|
yaffs_gross_unlock(dev);
|
|
|
|
if (filldir(dirent,
|
|
name,
|
|
strlen(name),
|
|
offset,
|
|
this_inode,
|
|
this_type) < 0){
|
|
yaffs_gross_lock(dev);
|
|
goto out;
|
|
}
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
offset++;
|
|
f->f_pos++;
|
|
}
|
|
yaffs_search_advance(sc);
|
|
}
|
|
|
|
out:
|
|
yaffs_search_end(sc);
|
|
yaffs_dev_to_lc(dev)->readdirProcess = NULL;
|
|
yaffs_gross_unlock(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_obj_t *obj = NULL;
|
|
yaffs_dev_t *dev;
|
|
|
|
yaffs_obj_t *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->obj_id, parent->variant_type));
|
|
} 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->my_dev;
|
|
|
|
yaffs_gross_lock(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_create_special(parent, dentry->d_name.name, mode, uid,
|
|
gid, old_encode_dev(rdev));
|
|
#else
|
|
obj = yaffs_create_special(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_create_file(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_create_dir(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_gross_unlock(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->obj_id, atomic_read(&inode->i_count)));
|
|
error = 0;
|
|
yaffs_fill_inode_from_obj(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_dev_t *dev;
|
|
yaffs_obj_t *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->my_dev;
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
retVal = yaffs_unlinker(obj, dentry->d_name.name);
|
|
|
|
if (retVal == YAFFS_OK) {
|
|
dentry->d_inode->i_nlink--;
|
|
dir->i_version++;
|
|
yaffs_gross_unlock(dev);
|
|
mark_inode_dirty(dentry->d_inode);
|
|
update_dir_time(dir);
|
|
return 0;
|
|
}
|
|
yaffs_gross_unlock(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_obj_t *obj = NULL;
|
|
yaffs_obj_t *link = NULL;
|
|
yaffs_dev_t *dev;
|
|
|
|
T(YAFFS_TRACE_OS, (TSTR("yaffs_link\n")));
|
|
|
|
obj = yaffs_InodeToObject(inode);
|
|
dev = obj->my_dev;
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
if (!S_ISDIR(inode->i_mode)) /* Don't link directories */
|
|
link = yaffs_link_obj(yaffs_InodeToObject(dir), dentry->d_name.name,
|
|
obj);
|
|
|
|
if (link) {
|
|
old_dentry->d_inode->i_nlink = yaffs_get_obj_link_count(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_gross_unlock(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_obj_t *obj;
|
|
yaffs_dev_t *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)->my_dev;
|
|
yaffs_gross_lock(dev);
|
|
obj = yaffs_create_symlink(yaffs_InodeToObject(dir), dentry->d_name.name,
|
|
S_IFLNK | S_IRWXUGO, uid, gid, symname);
|
|
yaffs_gross_unlock(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_obj_t *obj;
|
|
yaffs_dev_t *dev;
|
|
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34))
|
|
struct dentry *dentry = file->f_path.dentry;
|
|
#endif
|
|
|
|
obj = yaffs_dentry_to_obj(dentry);
|
|
|
|
dev = obj->my_dev;
|
|
|
|
T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC,
|
|
(TSTR("yaffs_sync_object\n")));
|
|
yaffs_gross_lock(dev);
|
|
yaffs_flush_file(obj, 1, datasync);
|
|
yaffs_gross_unlock(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_dev_t *dev;
|
|
int retVal = YAFFS_FAIL;
|
|
yaffs_obj_t *target;
|
|
|
|
T(YAFFS_TRACE_OS, (TSTR("yaffs_rename\n")));
|
|
dev = yaffs_InodeToObject(old_dir)->my_dev;
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
/* Check if the target is an existing directory that is not empty. */
|
|
target = yaffs_find_by_name(yaffs_InodeToObject(new_dir),
|
|
new_dentry->d_name.name);
|
|
|
|
|
|
|
|
if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
|
|
!ylist_empty(&target->variant.dir_variant.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_rename_obj\n")));
|
|
|
|
retVal = yaffs_rename_obj(yaffs_InodeToObject(old_dir),
|
|
old_dentry->d_name.name,
|
|
yaffs_InodeToObject(new_dir),
|
|
new_dentry->d_name.name);
|
|
}
|
|
yaffs_gross_unlock(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_dev_t *dev;
|
|
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_setattr of object %d\n"),
|
|
yaffs_InodeToObject(inode)->obj_id));
|
|
|
|
/* 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)->my_dev;
|
|
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_gross_lock(dev);
|
|
result = yaffs_set_attribs(yaffs_InodeToObject(inode), attr);
|
|
if(result == YAFFS_OK) {
|
|
error = 0;
|
|
} else {
|
|
error = -EPERM;
|
|
}
|
|
yaffs_gross_unlock(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_dev_t *dev;
|
|
yaffs_obj_t *obj = yaffs_InodeToObject(inode);
|
|
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_setxattr of object %d\n"),
|
|
obj->obj_id));
|
|
|
|
|
|
if (error == 0) {
|
|
int result;
|
|
dev = obj->my_dev;
|
|
yaffs_gross_lock(dev);
|
|
result = yaffs_set_xattrib(obj, name, value, size, flags);
|
|
if(result == YAFFS_OK)
|
|
error = 0;
|
|
else if(result < 0)
|
|
error = result;
|
|
yaffs_gross_unlock(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_dev_t *dev;
|
|
yaffs_obj_t *obj = yaffs_InodeToObject(inode);
|
|
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_getxattr \"%s\" from object %d\n"),
|
|
name, obj->obj_id));
|
|
|
|
if (error == 0) {
|
|
dev = obj->my_dev;
|
|
yaffs_gross_lock(dev);
|
|
error = yaffs_get_xattrib(obj, name, buff, size);
|
|
yaffs_gross_unlock(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_dev_t *dev;
|
|
yaffs_obj_t *obj = yaffs_InodeToObject(inode);
|
|
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_removexattr of object %d\n"),
|
|
obj->obj_id));
|
|
|
|
|
|
if (error == 0) {
|
|
int result;
|
|
dev = obj->my_dev;
|
|
yaffs_gross_lock(dev);
|
|
result = yaffs_remove_xattrib(obj, name);
|
|
if(result == YAFFS_OK)
|
|
error = 0;
|
|
else if(result < 0)
|
|
error = result;
|
|
yaffs_gross_unlock(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_dev_t *dev;
|
|
yaffs_obj_t *obj = yaffs_InodeToObject(inode);
|
|
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_listxattr of object %d\n"),
|
|
obj->obj_id));
|
|
|
|
|
|
if (error == 0) {
|
|
dev = obj->my_dev;
|
|
yaffs_gross_lock(dev);
|
|
error = yaffs_list_xattrib(obj, buff, size);
|
|
yaffs_gross_unlock(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_dev_t *dev = yaffs_dentry_to_obj(dentry)->my_dev;
|
|
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_dev_t *dev = yaffs_SuperToDevice(sb);
|
|
#else
|
|
static int yaffs_statfs(struct super_block *sb, struct statfs *buf)
|
|
{
|
|
yaffs_dev_t *dev = yaffs_SuperToDevice(sb);
|
|
#endif
|
|
|
|
T(YAFFS_TRACE_OS, (TSTR("yaffs_statfs\n")));
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
buf->f_type = YAFFS_MAGIC;
|
|
buf->f_bsize = sb->s_blocksize;
|
|
buf->f_namelen = 255;
|
|
|
|
if (dev->data_bytes_per_chunk & (dev->data_bytes_per_chunk - 1)) {
|
|
/* Do this if chunk size is not a power of 2 */
|
|
|
|
uint64_t bytesInDev;
|
|
uint64_t bytesFree;
|
|
|
|
bytesInDev = ((uint64_t)((dev->param.end_block - dev->param.start_block + 1))) *
|
|
((uint64_t)(dev->param.chunks_per_block * dev->data_bytes_per_chunk));
|
|
|
|
do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */
|
|
buf->f_blocks = bytesInDev;
|
|
|
|
bytesFree = ((uint64_t)(yaffs_get_n_free_chunks(dev))) *
|
|
((uint64_t)(dev->data_bytes_per_chunk));
|
|
|
|
do_div(bytesFree, sb->s_blocksize);
|
|
|
|
buf->f_bfree = bytesFree;
|
|
|
|
} else if (sb->s_blocksize > dev->data_bytes_per_chunk) {
|
|
|
|
buf->f_blocks =
|
|
(dev->param.end_block - dev->param.start_block + 1) *
|
|
dev->param.chunks_per_block /
|
|
(sb->s_blocksize / dev->data_bytes_per_chunk);
|
|
buf->f_bfree =
|
|
yaffs_get_n_free_chunks(dev) /
|
|
(sb->s_blocksize / dev->data_bytes_per_chunk);
|
|
} else {
|
|
buf->f_blocks =
|
|
(dev->param.end_block - dev->param.start_block + 1) *
|
|
dev->param.chunks_per_block *
|
|
(dev->data_bytes_per_chunk / sb->s_blocksize);
|
|
|
|
buf->f_bfree =
|
|
yaffs_get_n_free_chunks(dev) *
|
|
(dev->data_bytes_per_chunk / sb->s_blocksize);
|
|
}
|
|
|
|
buf->f_files = 0;
|
|
buf->f_ffree = 0;
|
|
buf->f_bavail = buf->f_bfree;
|
|
|
|
yaffs_gross_unlock(dev);
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
static void yaffs_flush_inodes(struct super_block *sb)
|
|
{
|
|
struct inode *iptr;
|
|
yaffs_obj_t *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->obj_id));
|
|
yaffs_flush_file(obj,1,0);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void yaffs_flush_super(struct super_block *sb, int do_checkpoint)
|
|
{
|
|
yaffs_dev_t *dev = yaffs_SuperToDevice(sb);
|
|
if(!dev)
|
|
return;
|
|
|
|
yaffs_flush_inodes(sb);
|
|
yaffs_update_dirty_dirs(dev);
|
|
yaffs_flush_whole_cache(dev);
|
|
if(do_checkpoint)
|
|
yaffs_checkpoint_save(dev);
|
|
}
|
|
|
|
|
|
static unsigned yaffs_bg_gc_urgency(yaffs_dev_t *dev)
|
|
{
|
|
unsigned erasedChunks = dev->n_erased_blocks * dev->param.chunks_per_block;
|
|
struct yaffs_LinuxContext *context = yaffs_dev_to_lc(dev);
|
|
unsigned scatteredFree = 0; /* Free chunks not in an erased block */
|
|
|
|
if(erasedChunks < dev->n_free_chunks)
|
|
scatteredFree = (dev->n_free_chunks - erasedChunks);
|
|
|
|
if(!context->bgRunning)
|
|
return 0;
|
|
else if(scatteredFree < (dev->param.chunks_per_block * 2))
|
|
return 0;
|
|
else if(erasedChunks > dev->n_free_chunks/2)
|
|
return 0;
|
|
else if(erasedChunks > dev->n_free_chunks/4)
|
|
return 1;
|
|
else
|
|
return 2;
|
|
}
|
|
|
|
static int yaffs_do_sync_fs(struct super_block *sb,
|
|
int request_checkpoint)
|
|
{
|
|
|
|
yaffs_dev_t *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_gross_lock(dev);
|
|
do_checkpoint = ((request_checkpoint && !gc_urgent) ||
|
|
oneshot_checkpoint) &&
|
|
!dev->is_checkpointed;
|
|
|
|
if (sb->s_dirt || do_checkpoint) {
|
|
yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint);
|
|
sb->s_dirt = 0;
|
|
if(oneshot_checkpoint)
|
|
yaffs_auto_checkpoint &= ~4;
|
|
}
|
|
yaffs_gross_unlock(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* yaffs background thread functions .
|
|
* yaffs_bg_thread_fn() the thread function
|
|
* yaffs_bg_start() launches the background thread.
|
|
* yaffs_bg_stop() 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_bg_thread_fn(void *data)
|
|
{
|
|
yaffs_dev_t *dev = (yaffs_dev_t *)data;
|
|
struct yaffs_LinuxContext *context = yaffs_dev_to_lc(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_gross_lock(dev);
|
|
|
|
now = jiffies;
|
|
|
|
if(time_after(now, next_dir_update) && yaffs_bg_enable){
|
|
yaffs_update_dirty_dirs(dev);
|
|
next_dir_update = now + HZ;
|
|
}
|
|
|
|
if(time_after(now,next_gc) && yaffs_bg_enable){
|
|
if(!dev->is_checkpointed){
|
|
urgency = yaffs_bg_gc_urgency(dev);
|
|
gcResult = yaffs_bg_gc(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_gross_unlock(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_bg_start(yaffs_dev_t *dev)
|
|
{
|
|
int retval = 0;
|
|
struct yaffs_LinuxContext *context = yaffs_dev_to_lc(dev);
|
|
|
|
if(dev->read_only)
|
|
return -1;
|
|
|
|
context->bgRunning = 1;
|
|
|
|
context->bgThread = kthread_run(yaffs_bg_thread_fn,
|
|
(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_bg_stop(yaffs_dev_t *dev)
|
|
{
|
|
struct yaffs_LinuxContext *ctxt = yaffs_dev_to_lc(dev);
|
|
|
|
ctxt->bgRunning = 0;
|
|
|
|
if( ctxt->bgThread){
|
|
kthread_stop(ctxt->bgThread);
|
|
ctxt->bgThread = NULL;
|
|
}
|
|
}
|
|
#else
|
|
static int yaffs_bg_thread_fn(void *data)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int yaffs_bg_start(yaffs_dev_t *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void yaffs_bg_stop(yaffs_dev_t *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_obj_t *obj;
|
|
yaffs_dev_t *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_gross_lock(dev);
|
|
|
|
obj = yaffs_find_by_number(dev, inode->i_ino);
|
|
|
|
yaffs_fill_inode_from_obj(inode, obj);
|
|
|
|
yaffs_gross_unlock(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_obj_t *obj;
|
|
yaffs_dev_t *dev = yaffs_SuperToDevice(inode->i_sb);
|
|
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_read_inode for %d\n"), (int)inode->i_ino));
|
|
|
|
if(current != yaffs_dev_to_lc(dev)->readdirProcess)
|
|
yaffs_gross_lock(dev);
|
|
|
|
obj = yaffs_find_by_number(dev, inode->i_ino);
|
|
|
|
yaffs_fill_inode_from_obj(inode, obj);
|
|
|
|
if(current != yaffs_dev_to_lc(dev)->readdirProcess)
|
|
yaffs_gross_unlock(dev);
|
|
}
|
|
|
|
#endif
|
|
|
|
static YLIST_HEAD(yaffs_context_list);
|
|
struct semaphore yaffs_context_lock;
|
|
|
|
static void yaffs_put_super(struct super_block *sb)
|
|
{
|
|
yaffs_dev_t *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_bg_stop(dev);
|
|
T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND,
|
|
(TSTR("yaffs background thread shut down\n")));
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
yaffs_flush_super(sb,1);
|
|
|
|
if (yaffs_dev_to_lc(dev)->putSuperFunc)
|
|
yaffs_dev_to_lc(dev)->putSuperFunc(sb);
|
|
|
|
|
|
yaffs_deinitialise(dev);
|
|
|
|
yaffs_gross_unlock(dev);
|
|
|
|
down(&yaffs_context_lock);
|
|
ylist_del_init(&(yaffs_dev_to_lc(dev)->contextList));
|
|
up(&yaffs_context_lock);
|
|
|
|
if (yaffs_dev_to_lc(dev)->spareBuffer) {
|
|
YFREE(yaffs_dev_to_lc(dev)->spareBuffer);
|
|
yaffs_dev_to_lc(dev)->spareBuffer = NULL;
|
|
}
|
|
|
|
kfree(dev);
|
|
}
|
|
|
|
|
|
static void yaffs_MTDPutSuper(struct super_block *sb)
|
|
{
|
|
struct mtd_info *mtd = yaffs_dev_to_mtd(yaffs_SuperToDevice(sb));
|
|
|
|
if (mtd->sync)
|
|
mtd->sync(mtd);
|
|
|
|
put_mtd_device(mtd);
|
|
}
|
|
|
|
|
|
static void yaffs_touch_super(yaffs_dev_t *dev)
|
|
{
|
|
struct super_block *sb = yaffs_dev_to_lc(dev)->superBlock;
|
|
|
|
T(YAFFS_TRACE_OS, (TSTR("yaffs_touch_super() 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 yaffs_version,
|
|
struct super_block *sb,
|
|
void *data, int silent)
|
|
{
|
|
int nBlocks;
|
|
struct inode *inode = NULL;
|
|
struct dentry *root;
|
|
yaffs_dev_t *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_param_t *param;
|
|
|
|
int read_only = 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;
|
|
|
|
read_only =((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),
|
|
read_only ? "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"), yaffs_version));
|
|
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 (yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR("yaffs: auto selecting yaffs2\n")));
|
|
yaffs_version = 2;
|
|
}
|
|
|
|
/* Added NCB 26/5/2006 for completeness */
|
|
if (yaffs_version == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) {
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR("yaffs: auto selecting yaffs1\n")));
|
|
yaffs_version = 1;
|
|
}
|
|
|
|
#endif
|
|
|
|
if (yaffs_version == 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_dev_t up for mtd
|
|
*/
|
|
|
|
if (!read_only && !(mtd->flags & MTD_WRITEABLE)){
|
|
read_only = 1;
|
|
printk(KERN_INFO "yaffs: mtd is read only, setting superblock read only");
|
|
sb->s_flags |= MS_RDONLY;
|
|
}
|
|
|
|
dev = kmalloc(sizeof(yaffs_dev_t), 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_dev_t. \n")));
|
|
return NULL;
|
|
}
|
|
memset(dev, 0, sizeof(yaffs_dev_t));
|
|
param = &(dev->param);
|
|
|
|
memset(context,0,sizeof(struct yaffs_LinuxContext));
|
|
dev->os_context = context;
|
|
YINIT_LIST_HEAD(&(context->contextList));
|
|
context->dev = dev;
|
|
context->superBlock = sb;
|
|
|
|
dev->read_only = read_only;
|
|
|
|
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0))
|
|
sb->s_fs_info = dev;
|
|
#else
|
|
sb->u.generic_sbp = dev;
|
|
#endif
|
|
|
|
dev->driver_context = mtd;
|
|
param->name = mtd->name;
|
|
|
|
/* Set up the memory size parameters.... */
|
|
|
|
nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK));
|
|
|
|
param->start_block = 0;
|
|
param->end_block = nBlocks - 1;
|
|
param->chunks_per_block = YAFFS_CHUNKS_PER_BLOCK;
|
|
param->total_bytes_per_chunk = YAFFS_BYTES_PER_CHUNK;
|
|
param->n_reserved_blocks = 5;
|
|
param->n_caches = (options.no_cache) ? 0 : 10;
|
|
param->inband_tags = options.inband_tags;
|
|
|
|
#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD
|
|
param->disable_lazy_load = 1;
|
|
#endif
|
|
#ifdef CONFIG_YAFFS_XATTR
|
|
param->enable_xattr = 1;
|
|
#endif
|
|
if(options.lazy_loading_overridden)
|
|
param->disable_lazy_load = !options.lazy_loading_enabled;
|
|
|
|
#ifdef CONFIG_YAFFS_DISABLE_TAGS_ECC
|
|
param->no_tags_ecc = 1;
|
|
#endif
|
|
|
|
#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND
|
|
#else
|
|
param->defered_dir_update = 1;
|
|
#endif
|
|
|
|
if(options.tags_ecc_overridden)
|
|
param->no_tags_ecc = !options.tags_ecc_on;
|
|
|
|
#ifdef CONFIG_YAFFS_EMPTY_LOST_AND_FOUND
|
|
param->empty_lost_n_found = 1;
|
|
#endif
|
|
|
|
#ifdef CONFIG_YAFFS_DISABLE_BLOCK_REFRESHING
|
|
param->refresh_period = 0;
|
|
#else
|
|
param->refresh_period = 500;
|
|
#endif
|
|
|
|
#ifdef CONFIG_YAFFS__ALWAYS_CHECK_CHUNK_ERASED
|
|
param->always_check_erased = 1;
|
|
#endif
|
|
|
|
if(options.empty_lost_and_found_overridden)
|
|
param->empty_lost_n_found = options.empty_lost_and_found;
|
|
|
|
/* ... and the functions. */
|
|
if (yaffs_version == 2) {
|
|
param->write_chunk_tags_fn =
|
|
nandmtd2_WriteChunkWithTagsToNAND;
|
|
param->read_chunk_tags_fn =
|
|
nandmtd2_ReadChunkWithTagsFromNAND;
|
|
param->bad_block_fn = nandmtd2_MarkNANDBlockBad;
|
|
param->query_block_fn = nandmtd2_QueryNANDBlock;
|
|
yaffs_dev_to_lc(dev)->spareBuffer = YMALLOC(mtd->oobsize);
|
|
param->is_yaffs2 = 1;
|
|
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
|
|
param->total_bytes_per_chunk = mtd->writesize;
|
|
param->chunks_per_block = mtd->erasesize / mtd->writesize;
|
|
#else
|
|
param->total_bytes_per_chunk = mtd->oobblock;
|
|
param->chunks_per_block = mtd->erasesize / mtd->oobblock;
|
|
#endif
|
|
nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize);
|
|
|
|
param->start_block = 0;
|
|
param->end_block = nBlocks - 1;
|
|
} else {
|
|
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
|
|
/* use the MTD interface in yaffs_mtdif1.c */
|
|
param->write_chunk_tags_fn =
|
|
nandmtd1_WriteChunkWithTagsToNAND;
|
|
param->read_chunk_tags_fn =
|
|
nandmtd1_ReadChunkWithTagsFromNAND;
|
|
param->bad_block_fn = nandmtd1_MarkNANDBlockBad;
|
|
param->query_block_fn = nandmtd1_QueryNANDBlock;
|
|
#else
|
|
param->write_chunk_fn = nandmtd_WriteChunkToNAND;
|
|
param->read_chunk_fn = nandmtd_ReadChunkFromNAND;
|
|
#endif
|
|
param->is_yaffs2 = 0;
|
|
}
|
|
/* ... and common functions */
|
|
param->erase_fn = nandmtd_EraseBlockInNAND;
|
|
param->initialise_flash_fn = nandmtd_InitialiseNAND;
|
|
|
|
yaffs_dev_to_lc(dev)->putSuperFunc = yaffs_MTDPutSuper;
|
|
|
|
param->sb_dirty_fn = yaffs_touch_super;
|
|
param->gc_control = yaffs_gc_control_callback;
|
|
|
|
yaffs_dev_to_lc(dev)->superBlock= sb;
|
|
|
|
|
|
#ifndef CONFIG_YAFFS_DOES_ECC
|
|
param->use_nand_ecc = 1;
|
|
#endif
|
|
|
|
#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES
|
|
param->wide_tnodes_disabled = 1;
|
|
#endif
|
|
|
|
param->skip_checkpt_rd = options.skip_checkpoint_read;
|
|
param->skip_checkpt_wr = 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_dev_to_lc(dev)->contextList), &yaffs_context_list);
|
|
up(&yaffs_context_lock);
|
|
|
|
/* Directory search handling...*/
|
|
YINIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->searchContexts));
|
|
param->remove_obj_fn = yaffs_remove_obj_callback;
|
|
|
|
init_MUTEX(&(yaffs_dev_to_lc(dev)->grossLock));
|
|
|
|
yaffs_gross_lock(dev);
|
|
|
|
err = yaffs_guts_initialise(dev);
|
|
|
|
T(YAFFS_TRACE_OS,
|
|
(TSTR("yaffs_read_super: guts initialised %s\n"),
|
|
(err == YAFFS_OK) ? "OK" : "FAILED"));
|
|
|
|
if(err == YAFFS_OK)
|
|
yaffs_bg_start(dev);
|
|
|
|
if(!context->bgThread)
|
|
param->defered_dir_update = 0;
|
|
|
|
|
|
/* Release lock before yaffs_get_inode() */
|
|
yaffs_gross_unlock(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->is_checkpointed;
|
|
T(YAFFS_TRACE_ALWAYS,
|
|
(TSTR("yaffs_read_super: is_checkpointed %d\n"),
|
|
dev->is_checkpointed));
|
|
|
|
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_dev_t * dev)
|
|
{
|
|
buf += sprintf(buf, "start_block.......... %d\n", dev->param.start_block);
|
|
buf += sprintf(buf, "end_block............ %d\n", dev->param.end_block);
|
|
buf += sprintf(buf, "total_bytes_per_chunk %d\n", dev->param.total_bytes_per_chunk);
|
|
buf += sprintf(buf, "use_nand_ecc......... %d\n", dev->param.use_nand_ecc);
|
|
buf += sprintf(buf, "no_tags_ecc.......... %d\n", dev->param.no_tags_ecc);
|
|
buf += sprintf(buf, "is_yaffs2............ %d\n", dev->param.is_yaffs2);
|
|
buf += sprintf(buf, "inband_tags.......... %d\n", dev->param.inband_tags);
|
|
buf += sprintf(buf, "empty_lost_n_found... %d\n", dev->param.empty_lost_n_found);
|
|
buf += sprintf(buf, "disable_lazy_load.... %d\n", dev->param.disable_lazy_load);
|
|
buf += sprintf(buf, "refresh_period....... %d\n", dev->param.refresh_period);
|
|
buf += sprintf(buf, "n_caches............. %d\n", dev->param.n_caches);
|
|
buf += sprintf(buf, "n_reserved_blocks.... %d\n", dev->param.n_reserved_blocks);
|
|
buf += sprintf(buf, "always_check_erased.. %d\n", dev->param.always_check_erased);
|
|
|
|
buf += sprintf(buf, "\n");
|
|
|
|
return buf;
|
|
}
|
|
|
|
|
|
static char *yaffs_dump_dev_part1(char *buf, yaffs_dev_t * dev)
|
|
{
|
|
buf += sprintf(buf, "data_bytes_per_chunk. %d\n", dev->data_bytes_per_chunk);
|
|
buf += sprintf(buf, "chunk_grp_bits....... %d\n", dev->chunk_grp_bits);
|
|
buf += sprintf(buf, "chunk_grp_size....... %d\n", dev->chunk_grp_size);
|
|
buf += sprintf(buf, "n_erased_blocks...... %d\n", dev->n_erased_blocks);
|
|
buf += sprintf(buf, "blocks_in_checkpt.... %d\n", dev->blocks_in_checkpt);
|
|
buf += sprintf(buf, "\n");
|
|
buf += sprintf(buf, "n_tnodes............. %d\n", dev->n_tnodes);
|
|
buf += sprintf(buf, "n_obj................ %d\n", dev->n_obj);
|
|
buf += sprintf(buf, "n_free_chunks........ %d\n", dev->n_free_chunks);
|
|
buf += sprintf(buf, "\n");
|
|
buf += sprintf(buf, "n_page_writes........ %u\n", dev->n_page_writes);
|
|
buf += sprintf(buf, "n_page_reads......... %u\n", dev->n_page_reads);
|
|
buf += sprintf(buf, "n_erasures........... %u\n", dev->n_erasures);
|
|
buf += sprintf(buf, "n_gc_copies.......... %u\n", dev->n_gc_copies);
|
|
buf += sprintf(buf, "all_gcs.............. %u\n", dev->all_gcs);
|
|
buf += sprintf(buf, "passive_gc_count..... %u\n", dev->passive_gc_count);
|
|
buf += sprintf(buf, "oldest_dirty_gc_count %u\n", dev->oldest_dirty_gc_count);
|
|
buf += sprintf(buf, "n_gc_blocks.......... %u\n", dev->n_gc_blocks);
|
|
buf += sprintf(buf, "bg_gcs............... %u\n", dev->bg_gcs);
|
|
buf += sprintf(buf, "n_retired_writes..... %u\n", dev->n_retired_writes);
|
|
buf += sprintf(buf, "nRetireBlocks........ %u\n", dev->n_retired_blocks);
|
|
buf += sprintf(buf, "n_ecc_fixed.......... %u\n", dev->n_ecc_fixed);
|
|
buf += sprintf(buf, "n_ecc_unfixed........ %u\n", dev->n_ecc_unfixed);
|
|
buf += sprintf(buf, "n_tags_ecc_fixed..... %u\n", dev->n_tags_ecc_fixed);
|
|
buf += sprintf(buf, "n_tags_ecc_unfixed... %u\n", dev->n_tags_ecc_unfixed);
|
|
buf += sprintf(buf, "cache_hits........... %u\n", dev->cache_hits);
|
|
buf += sprintf(buf, "n_deleted_files...... %u\n", dev->n_deleted_files);
|
|
buf += sprintf(buf, "n_unlinked_files..... %u\n", dev->n_unlinked_files);
|
|
buf += sprintf(buf, "refresh_count........ %u\n", dev->refresh_count);
|
|
buf += sprintf(buf, "n_bg_deletions....... %u\n", dev->n_bg_deletions);
|
|
|
|
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 dev_list.
|
|
* 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, "Multi-version 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_dev_t *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_dev_t *dev = dc->dev;
|
|
|
|
int erasedChunks;
|
|
|
|
erasedChunks = dev->n_erased_blocks * dev->param.chunks_per_block;
|
|
|
|
buf += sprintf(buf,"%d, %d, %d, %u, %u, %u, %u\n",
|
|
n, dev->n_free_chunks, erasedChunks,
|
|
dev->bg_gcs, dev->oldest_dirty_gc_count,
|
|
dev->n_obj, dev->n_tnodes);
|
|
}
|
|
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_trace_mask;
|
|
|
|
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_trace_mask = rg | YAFFS_TRACE_ALWAYS;
|
|
|
|
printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_trace_mask);
|
|
|
|
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");
|