Merge branch 'kill-jffs' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6
* 'kill-jffs' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6: Remove JFFS (version 1), as scheduled.
This commit is contained in:
Linus Torvalds
commit
ebbe46f73a
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@ -283,13 +283,6 @@ Who: Len Brown <len.brown@intel.com>
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---------------------------
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---------------------------
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What: JFFS (version 1)
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When: 2.6.21
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Why: Unmaintained for years, superceded by JFFS2 for years.
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Who: Jeff Garzik <jeff@garzik.org>
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---------------------------
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What: sk98lin network driver
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What: sk98lin network driver
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When: July 2007
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When: July 2007
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Why: In kernel tree version of driver is unmaintained. Sk98lin driver
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Why: In kernel tree version of driver is unmaintained. Sk98lin driver
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26
fs/Kconfig
26
fs/Kconfig
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@ -1189,32 +1189,6 @@ config EFS_FS
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To compile the EFS file system support as a module, choose M here: the
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To compile the EFS file system support as a module, choose M here: the
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module will be called efs.
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module will be called efs.
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config JFFS_FS
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tristate "Journalling Flash File System (JFFS) support"
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depends on MTD && BLOCK && BROKEN
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help
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JFFS is the Journalling Flash File System developed by Axis
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Communications in Sweden, aimed at providing a crash/powerdown-safe
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file system for disk-less embedded devices. Further information is
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available at (<http://developer.axis.com/software/jffs/>).
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NOTE: This filesystem is deprecated and is scheduled for removal in
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2.6.21. See Documentation/feature-removal-schedule.txt
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config JFFS_FS_VERBOSE
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int "JFFS debugging verbosity (0 = quiet, 3 = noisy)"
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depends on JFFS_FS
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default "0"
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help
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Determines the verbosity level of the JFFS debugging messages.
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config JFFS_PROC_FS
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bool "JFFS stats available in /proc filesystem"
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depends on JFFS_FS && PROC_FS
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help
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Enabling this option will cause statistics from mounted JFFS file systems
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to be made available to the user in the /proc/fs/jffs/ directory.
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config JFFS2_FS
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config JFFS2_FS
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tristate "Journalling Flash File System v2 (JFFS2) support"
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tristate "Journalling Flash File System v2 (JFFS2) support"
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select CRC32
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select CRC32
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@ -94,7 +94,6 @@ obj-$(CONFIG_HPFS_FS) += hpfs/
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obj-$(CONFIG_NTFS_FS) += ntfs/
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obj-$(CONFIG_NTFS_FS) += ntfs/
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obj-$(CONFIG_UFS_FS) += ufs/
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obj-$(CONFIG_UFS_FS) += ufs/
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obj-$(CONFIG_EFS_FS) += efs/
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obj-$(CONFIG_EFS_FS) += efs/
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obj-$(CONFIG_JFFS_FS) += jffs/
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obj-$(CONFIG_JFFS2_FS) += jffs2/
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obj-$(CONFIG_JFFS2_FS) += jffs2/
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obj-$(CONFIG_AFFS_FS) += affs/
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obj-$(CONFIG_AFFS_FS) += affs/
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obj-$(CONFIG_ROMFS_FS) += romfs/
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obj-$(CONFIG_ROMFS_FS) += romfs/
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@ -1,11 +0,0 @@
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#
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# Makefile for the linux Journalling Flash FileSystem (JFFS) routines.
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#
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# $Id: Makefile,v 1.11 2001/09/25 20:59:41 dwmw2 Exp $
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#
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obj-$(CONFIG_JFFS_FS) += jffs.o
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jffs-y := jffs_fm.o intrep.o inode-v23.o
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jffs-$(CONFIG_JFFS_PROC_FS) += jffs_proc.o
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jffs-objs := $(jffs-y)
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1847
fs/jffs/inode-v23.c
1847
fs/jffs/inode-v23.c
File diff suppressed because it is too large
Load Diff
3449
fs/jffs/intrep.c
3449
fs/jffs/intrep.c
File diff suppressed because it is too large
Load Diff
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@ -1,58 +0,0 @@
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/*
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* JFFS -- Journaling Flash File System, Linux implementation.
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*
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* Copyright (C) 1999, 2000 Axis Communications AB.
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*
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* Created by Finn Hakansson <finn@axis.com>.
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* $Id: intrep.h,v 1.14 2001/09/23 23:28:37 dwmw2 Exp $
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*
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*/
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#ifndef __LINUX_JFFS_INTREP_H__
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#define __LINUX_JFFS_INTREP_H__
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#include "jffs_fm.h"
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struct jffs_node *jffs_alloc_node(void);
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void jffs_free_node(struct jffs_node *n);
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int jffs_get_node_inuse(void);
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void jffs_cleanup_control(struct jffs_control *c);
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int jffs_build_fs(struct super_block *sb);
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int jffs_insert_node(struct jffs_control *c, struct jffs_file *f,
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const struct jffs_raw_inode *raw_inode,
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const char *name, struct jffs_node *node);
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struct jffs_file *jffs_find_file(struct jffs_control *c, __u32 ino);
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struct jffs_file *jffs_find_child(struct jffs_file *dir, const char *name, int len);
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void jffs_free_node(struct jffs_node *node);
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int jffs_foreach_file(struct jffs_control *c, int (*func)(struct jffs_file *));
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int jffs_possibly_delete_file(struct jffs_file *f);
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int jffs_insert_file_into_tree(struct jffs_file *f);
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int jffs_unlink_file_from_tree(struct jffs_file *f);
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int jffs_file_count(struct jffs_file *f);
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int jffs_write_node(struct jffs_control *c, struct jffs_node *node,
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struct jffs_raw_inode *raw_inode,
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const char *name, const unsigned char *buf,
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int recoverable, struct jffs_file *f);
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int jffs_read_data(struct jffs_file *f, unsigned char *buf, __u32 read_offset, __u32 size);
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/* Garbage collection stuff. */
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int jffs_garbage_collect_thread(void *c);
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void jffs_garbage_collect_trigger(struct jffs_control *c);
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/* For debugging purposes. */
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#if 0
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int jffs_print_file(struct jffs_file *f);
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#endif /* 0 */
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void jffs_print_hash_table(struct jffs_control *c);
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void jffs_print_tree(struct jffs_file *first_file, int indent);
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#endif /* __LINUX_JFFS_INTREP_H__ */
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@ -1,798 +0,0 @@
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/*
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* JFFS -- Journaling Flash File System, Linux implementation.
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*
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* Copyright (C) 1999, 2000 Axis Communications AB.
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*
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* Created by Finn Hakansson <finn@axis.com>.
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||||||
*
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||||||
* This is free software; you can redistribute it and/or modify it
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|
||||||
* under the terms of the GNU General Public License as published by
|
|
||||||
* the Free Software Foundation; either version 2 of the License, or
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|
||||||
* (at your option) any later version.
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||||||
*
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* $Id: jffs_fm.c,v 1.27 2001/09/20 12:29:47 dwmw2 Exp $
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*
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* Ported to Linux 2.3.x and MTD:
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* Copyright (C) 2000 Alexander Larsson (alex@cendio.se), Cendio Systems AB
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*
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*/
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/blkdev.h>
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#include <linux/jffs.h>
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#include "jffs_fm.h"
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#include "intrep.h"
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#if defined(JFFS_MARK_OBSOLETE) && JFFS_MARK_OBSOLETE
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static int jffs_mark_obsolete(struct jffs_fmcontrol *fmc, __u32 fm_offset);
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#endif
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static struct jffs_fm *jffs_alloc_fm(void);
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static void jffs_free_fm(struct jffs_fm *n);
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extern struct kmem_cache *fm_cache;
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extern struct kmem_cache *node_cache;
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#if CONFIG_JFFS_FS_VERBOSE > 0
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void
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jffs_print_fmcontrol(struct jffs_fmcontrol *fmc)
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{
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D(printk("struct jffs_fmcontrol: 0x%p\n", fmc));
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D(printk("{\n"));
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D(printk(" %u, /* flash_size */\n", fmc->flash_size));
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D(printk(" %u, /* used_size */\n", fmc->used_size));
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D(printk(" %u, /* dirty_size */\n", fmc->dirty_size));
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D(printk(" %u, /* free_size */\n", fmc->free_size));
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D(printk(" %u, /* sector_size */\n", fmc->sector_size));
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D(printk(" %u, /* min_free_size */\n", fmc->min_free_size));
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D(printk(" %u, /* max_chunk_size */\n", fmc->max_chunk_size));
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D(printk(" 0x%p, /* mtd */\n", fmc->mtd));
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D(printk(" 0x%p, /* head */ "
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"(head->offset = 0x%08x)\n",
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|
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fmc->head, (fmc->head ? fmc->head->offset : 0)));
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|
||||||
D(printk(" 0x%p, /* tail */ "
|
|
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"(tail->offset + tail->size = 0x%08x)\n",
|
|
||||||
fmc->tail,
|
|
||||||
(fmc->tail ? fmc->tail->offset + fmc->tail->size : 0)));
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|
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D(printk(" 0x%p, /* head_extra */\n", fmc->head_extra));
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|
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D(printk(" 0x%p, /* tail_extra */\n", fmc->tail_extra));
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|
||||||
D(printk("}\n"));
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}
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|
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#endif /* CONFIG_JFFS_FS_VERBOSE > 0 */
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|
||||||
|
|
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#if CONFIG_JFFS_FS_VERBOSE > 2
|
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static void
|
|
||||||
jffs_print_fm(struct jffs_fm *fm)
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|
||||||
{
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|
||||||
D(printk("struct jffs_fm: 0x%p\n", fm));
|
|
||||||
D(printk("{\n"));
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|
||||||
D(printk(" 0x%08x, /* offset */\n", fm->offset));
|
|
||||||
D(printk(" %u, /* size */\n", fm->size));
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|
||||||
D(printk(" 0x%p, /* prev */\n", fm->prev));
|
|
||||||
D(printk(" 0x%p, /* next */\n", fm->next));
|
|
||||||
D(printk(" 0x%p, /* nodes */\n", fm->nodes));
|
|
||||||
D(printk("}\n"));
|
|
||||||
}
|
|
||||||
#endif /* CONFIG_JFFS_FS_VERBOSE > 2 */
|
|
||||||
|
|
||||||
#if 0
|
|
||||||
void
|
|
||||||
jffs_print_node_ref(struct jffs_node_ref *ref)
|
|
||||||
{
|
|
||||||
D(printk("struct jffs_node_ref: 0x%p\n", ref));
|
|
||||||
D(printk("{\n"));
|
|
||||||
D(printk(" 0x%p, /* node */\n", ref->node));
|
|
||||||
D(printk(" 0x%p, /* next */\n", ref->next));
|
|
||||||
D(printk("}\n"));
|
|
||||||
}
|
|
||||||
#endif /* 0 */
|
|
||||||
|
|
||||||
/* This function creates a new shiny flash memory control structure. */
|
|
||||||
struct jffs_fmcontrol *
|
|
||||||
jffs_build_begin(struct jffs_control *c, int unit)
|
|
||||||
{
|
|
||||||
struct jffs_fmcontrol *fmc;
|
|
||||||
struct mtd_info *mtd;
|
|
||||||
|
|
||||||
D3(printk("jffs_build_begin()\n"));
|
|
||||||
fmc = kmalloc(sizeof(*fmc), GFP_KERNEL);
|
|
||||||
if (!fmc) {
|
|
||||||
D(printk("jffs_build_begin(): Allocation of "
|
|
||||||
"struct jffs_fmcontrol failed!\n"));
|
|
||||||
return (struct jffs_fmcontrol *)0;
|
|
||||||
}
|
|
||||||
DJM(no_jffs_fmcontrol++);
|
|
||||||
|
|
||||||
mtd = get_mtd_device(NULL, unit);
|
|
||||||
|
|
||||||
if (IS_ERR(mtd)) {
|
|
||||||
kfree(fmc);
|
|
||||||
DJM(no_jffs_fmcontrol--);
|
|
||||||
return NULL;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Retrieve the size of the flash memory. */
|
|
||||||
fmc->flash_size = mtd->size;
|
|
||||||
D3(printk(" fmc->flash_size = %d bytes\n", fmc->flash_size));
|
|
||||||
|
|
||||||
fmc->used_size = 0;
|
|
||||||
fmc->dirty_size = 0;
|
|
||||||
fmc->free_size = mtd->size;
|
|
||||||
fmc->sector_size = mtd->erasesize;
|
|
||||||
fmc->max_chunk_size = fmc->sector_size >> 1;
|
|
||||||
/* min_free_size:
|
|
||||||
1 sector, obviously.
|
|
||||||
+ 1 x max_chunk_size, for when a nodes overlaps the end of a sector
|
|
||||||
+ 1 x max_chunk_size again, which ought to be enough to handle
|
|
||||||
the case where a rename causes a name to grow, and GC has
|
|
||||||
to write out larger nodes than the ones it's obsoleting.
|
|
||||||
We should fix it so it doesn't have to write the name
|
|
||||||
_every_ time. Later.
|
|
||||||
+ another 2 sectors because people keep getting GC stuck and
|
|
||||||
we don't know why. This scares me - I want formal proof
|
|
||||||
of correctness of whatever number we put here. dwmw2.
|
|
||||||
*/
|
|
||||||
fmc->min_free_size = fmc->sector_size << 2;
|
|
||||||
fmc->mtd = mtd;
|
|
||||||
fmc->c = c;
|
|
||||||
fmc->head = NULL;
|
|
||||||
fmc->tail = NULL;
|
|
||||||
fmc->head_extra = NULL;
|
|
||||||
fmc->tail_extra = NULL;
|
|
||||||
mutex_init(&fmc->biglock);
|
|
||||||
return fmc;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/* When the flash memory scan has completed, this function should be called
|
|
||||||
before use of the control structure. */
|
|
||||||
void
|
|
||||||
jffs_build_end(struct jffs_fmcontrol *fmc)
|
|
||||||
{
|
|
||||||
D3(printk("jffs_build_end()\n"));
|
|
||||||
|
|
||||||
if (!fmc->head) {
|
|
||||||
fmc->head = fmc->head_extra;
|
|
||||||
fmc->tail = fmc->tail_extra;
|
|
||||||
}
|
|
||||||
else if (fmc->head_extra) {
|
|
||||||
fmc->tail_extra->next = fmc->head;
|
|
||||||
fmc->head->prev = fmc->tail_extra;
|
|
||||||
fmc->head = fmc->head_extra;
|
|
||||||
}
|
|
||||||
fmc->head_extra = NULL; /* These two instructions should be omitted. */
|
|
||||||
fmc->tail_extra = NULL;
|
|
||||||
D3(jffs_print_fmcontrol(fmc));
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/* Call this function when the file system is unmounted. This function
|
|
||||||
frees all memory used by this module. */
|
|
||||||
void
|
|
||||||
jffs_cleanup_fmcontrol(struct jffs_fmcontrol *fmc)
|
|
||||||
{
|
|
||||||
if (fmc) {
|
|
||||||
struct jffs_fm *next = fmc->head;
|
|
||||||
while (next) {
|
|
||||||
struct jffs_fm *cur = next;
|
|
||||||
next = next->next;
|
|
||||||
jffs_free_fm(cur);
|
|
||||||
}
|
|
||||||
put_mtd_device(fmc->mtd);
|
|
||||||
kfree(fmc);
|
|
||||||
DJM(no_jffs_fmcontrol--);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/* This function returns the size of the first chunk of free space on the
|
|
||||||
flash memory. This function will return something nonzero if the flash
|
|
||||||
memory contains any free space. */
|
|
||||||
__u32
|
|
||||||
jffs_free_size1(struct jffs_fmcontrol *fmc)
|
|
||||||
{
|
|
||||||
__u32 head;
|
|
||||||
__u32 tail;
|
|
||||||
__u32 end = fmc->flash_size;
|
|
||||||
|
|
||||||
if (!fmc->head) {
|
|
||||||
/* There is nothing on the flash. */
|
|
||||||
return fmc->flash_size;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Compute the beginning and ending of the contents of the flash. */
|
|
||||||
head = fmc->head->offset;
|
|
||||||
tail = fmc->tail->offset + fmc->tail->size;
|
|
||||||
if (tail == end) {
|
|
||||||
tail = 0;
|
|
||||||
}
|
|
||||||
ASSERT(else if (tail > end) {
|
|
||||||
printk(KERN_WARNING "jffs_free_size1(): tail > end\n");
|
|
||||||
tail = 0;
|
|
||||||
});
|
|
||||||
|
|
||||||
if (head <= tail) {
|
|
||||||
return end - tail;
|
|
||||||
}
|
|
||||||
else {
|
|
||||||
return head - tail;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/* This function will return something nonzero in case there are two free
|
|
||||||
areas on the flash. Like this:
|
|
||||||
|
|
||||||
+----------------+------------------+----------------+
|
|
||||||
| FREE 1 | USED / DIRTY | FREE 2 |
|
|
||||||
+----------------+------------------+----------------+
|
|
||||||
fmc->head -----^
|
|
||||||
fmc->tail ------------------------^
|
|
||||||
|
|
||||||
The value returned, will be the size of the first empty area on the
|
|
||||||
flash, in this case marked "FREE 1". */
|
|
||||||
__u32
|
|
||||||
jffs_free_size2(struct jffs_fmcontrol *fmc)
|
|
||||||
{
|
|
||||||
if (fmc->head) {
|
|
||||||
__u32 head = fmc->head->offset;
|
|
||||||
__u32 tail = fmc->tail->offset + fmc->tail->size;
|
|
||||||
if (tail == fmc->flash_size) {
|
|
||||||
tail = 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (tail >= head) {
|
|
||||||
return head;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/* Allocate a chunk of flash memory. If there is enough space on the
|
|
||||||
device, a reference to the associated node is stored in the jffs_fm
|
|
||||||
struct. */
|
|
||||||
int
|
|
||||||
jffs_fmalloc(struct jffs_fmcontrol *fmc, __u32 size, struct jffs_node *node,
|
|
||||||
struct jffs_fm **result)
|
|
||||||
{
|
|
||||||
struct jffs_fm *fm;
|
|
||||||
__u32 free_chunk_size1;
|
|
||||||
__u32 free_chunk_size2;
|
|
||||||
|
|
||||||
D2(printk("jffs_fmalloc(): fmc = 0x%p, size = %d, "
|
|
||||||
"node = 0x%p\n", fmc, size, node));
|
|
||||||
|
|
||||||
*result = NULL;
|
|
||||||
|
|
||||||
if (!(fm = jffs_alloc_fm())) {
|
|
||||||
D(printk("jffs_fmalloc(): kmalloc() failed! (fm)\n"));
|
|
||||||
return -ENOMEM;
|
|
||||||
}
|
|
||||||
|
|
||||||
free_chunk_size1 = jffs_free_size1(fmc);
|
|
||||||
free_chunk_size2 = jffs_free_size2(fmc);
|
|
||||||
if (free_chunk_size1 + free_chunk_size2 != fmc->free_size) {
|
|
||||||
printk(KERN_WARNING "Free size accounting screwed\n");
|
|
||||||
printk(KERN_WARNING "free_chunk_size1 == 0x%x, free_chunk_size2 == 0x%x, fmc->free_size == 0x%x\n", free_chunk_size1, free_chunk_size2, fmc->free_size);
|
|
||||||
}
|
|
||||||
|
|
||||||
D3(printk("jffs_fmalloc(): free_chunk_size1 = %u, "
|
|
||||||
"free_chunk_size2 = %u\n",
|
|
||||||
free_chunk_size1, free_chunk_size2));
|
|
||||||
|
|
||||||
if (size <= free_chunk_size1) {
|
|
||||||
if (!(fm->nodes = (struct jffs_node_ref *)
|
|
||||||
kmalloc(sizeof(struct jffs_node_ref),
|
|
||||||
GFP_KERNEL))) {
|
|
||||||
D(printk("jffs_fmalloc(): kmalloc() failed! "
|
|
||||||
"(node_ref)\n"));
|
|
||||||
jffs_free_fm(fm);
|
|
||||||
return -ENOMEM;
|
|
||||||
}
|
|
||||||
DJM(no_jffs_node_ref++);
|
|
||||||
fm->nodes->node = node;
|
|
||||||
fm->nodes->next = NULL;
|
|
||||||
if (fmc->tail) {
|
|
||||||
fm->offset = fmc->tail->offset + fmc->tail->size;
|
|
||||||
if (fm->offset == fmc->flash_size) {
|
|
||||||
fm->offset = 0;
|
|
||||||
}
|
|
||||||
ASSERT(else if (fm->offset > fmc->flash_size) {
|
|
||||||
printk(KERN_WARNING "jffs_fmalloc(): "
|
|
||||||
"offset > flash_end\n");
|
|
||||||
fm->offset = 0;
|
|
||||||
});
|
|
||||||
}
|
|
||||||
else {
|
|
||||||
/* There don't have to be files in the file
|
|
||||||
system yet. */
|
|
||||||
fm->offset = 0;
|
|
||||||
}
|
|
||||||
fm->size = size;
|
|
||||||
fmc->free_size -= size;
|
|
||||||
fmc->used_size += size;
|
|
||||||
}
|
|
||||||
else if (size > free_chunk_size2) {
|
|
||||||
printk(KERN_WARNING "JFFS: Tried to allocate a too "
|
|
||||||
"large flash memory chunk. (size = %u)\n", size);
|
|
||||||
jffs_free_fm(fm);
|
|
||||||
return -ENOSPC;
|
|
||||||
}
|
|
||||||
else {
|
|
||||||
fm->offset = fmc->tail->offset + fmc->tail->size;
|
|
||||||
fm->size = free_chunk_size1;
|
|
||||||
fm->nodes = NULL;
|
|
||||||
fmc->free_size -= fm->size;
|
|
||||||
fmc->dirty_size += fm->size; /* Changed by simonk. This seemingly fixes a
|
|
||||||
bug that caused infinite garbage collection.
|
|
||||||
It previously set fmc->dirty_size to size (which is the
|
|
||||||
size of the requested chunk).
|
|
||||||
*/
|
|
||||||
}
|
|
||||||
|
|
||||||
fm->next = NULL;
|
|
||||||
if (!fmc->head) {
|
|
||||||
fm->prev = NULL;
|
|
||||||
fmc->head = fm;
|
|
||||||
fmc->tail = fm;
|
|
||||||
}
|
|
||||||
else {
|
|
||||||
fm->prev = fmc->tail;
|
|
||||||
fmc->tail->next = fm;
|
|
||||||
fmc->tail = fm;
|
|
||||||
}
|
|
||||||
|
|
||||||
D3(jffs_print_fmcontrol(fmc));
|
|
||||||
D3(jffs_print_fm(fm));
|
|
||||||
*result = fm;
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/* The on-flash space is not needed anymore by the passed node. Remove
|
|
||||||
the reference to the node from the node list. If the data chunk in
|
|
||||||
the flash memory isn't used by any more nodes anymore (fm->nodes == 0),
|
|
||||||
then mark that chunk as dirty. */
|
|
||||||
int
|
|
||||||
jffs_fmfree(struct jffs_fmcontrol *fmc, struct jffs_fm *fm, struct jffs_node *node)
|
|
||||||
{
|
|
||||||
struct jffs_node_ref *ref;
|
|
||||||
struct jffs_node_ref *prev;
|
|
||||||
ASSERT(int del = 0);
|
|
||||||
|
|
||||||
D2(printk("jffs_fmfree(): node->ino = %u, node->version = %u\n",
|
|
||||||
node->ino, node->version));
|
|
||||||
|
|
||||||
ASSERT(if (!fmc || !fm || !fm->nodes) {
|
|
||||||
printk(KERN_ERR "jffs_fmfree(): fmc: 0x%p, fm: 0x%p, "
|
|
||||||
"fm->nodes: 0x%p\n",
|
|
||||||
fmc, fm, (fm ? fm->nodes : NULL));
|
|
||||||
return -1;
|
|
||||||
});
|
|
||||||
|
|
||||||
/* Find the reference to the node that is going to be removed
|
|
||||||
and remove it. */
|
|
||||||
for (ref = fm->nodes, prev = NULL; ref; ref = ref->next) {
|
|
||||||
if (ref->node == node) {
|
|
||||||
if (prev) {
|
|
||||||
prev->next = ref->next;
|
|
||||||
}
|
|
||||||
else {
|
|
||||||
fm->nodes = ref->next;
|
|
||||||
}
|
|
||||||
kfree(ref);
|
|
||||||
DJM(no_jffs_node_ref--);
|
|
||||||
ASSERT(del = 1);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
prev = ref;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* If the data chunk in the flash memory isn't used anymore
|
|
||||||
just mark it as obsolete. */
|
|
||||||
if (!fm->nodes) {
|
|
||||||
/* No node uses this chunk so let's remove it. */
|
|
||||||
fmc->used_size -= fm->size;
|
|
||||||
fmc->dirty_size += fm->size;
|
|
||||||
#if defined(JFFS_MARK_OBSOLETE) && JFFS_MARK_OBSOLETE
|
|
||||||
if (jffs_mark_obsolete(fmc, fm->offset) < 0) {
|
|
||||||
D1(printk("jffs_fmfree(): Failed to mark an on-flash "
|
|
||||||
"node obsolete!\n"));
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
#endif
|
|
||||||
}
|
|
||||||
|
|
||||||
ASSERT(if (!del) {
|
|
||||||
printk(KERN_WARNING "***jffs_fmfree(): "
|
|
||||||
"Didn't delete any node reference!\n");
|
|
||||||
});
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/* This allocation function is used during the initialization of
|
|
||||||
the file system. */
|
|
||||||
struct jffs_fm *
|
|
||||||
jffs_fmalloced(struct jffs_fmcontrol *fmc, __u32 offset, __u32 size,
|
|
||||||
struct jffs_node *node)
|
|
||||||
{
|
|
||||||
struct jffs_fm *fm;
|
|
||||||
|
|
||||||
D3(printk("jffs_fmalloced()\n"));
|
|
||||||
|
|
||||||
if (!(fm = jffs_alloc_fm())) {
|
|
||||||
D(printk("jffs_fmalloced(0x%p, %u, %u, 0x%p): failed!\n",
|
|
||||||
fmc, offset, size, node));
|
|
||||||
return NULL;
|
|
||||||
}
|
|
||||||
fm->offset = offset;
|
|
||||||
fm->size = size;
|
|
||||||
fm->prev = NULL;
|
|
||||||
fm->next = NULL;
|
|
||||||
fm->nodes = NULL;
|
|
||||||
if (node) {
|
|
||||||
/* `node' exists and it should be associated with the
|
|
||||||
jffs_fm structure `fm'. */
|
|
||||||
if (!(fm->nodes = (struct jffs_node_ref *)
|
|
||||||
kmalloc(sizeof(struct jffs_node_ref),
|
|
||||||
GFP_KERNEL))) {
|
|
||||||
D(printk("jffs_fmalloced(): !fm->nodes\n"));
|
|
||||||
jffs_free_fm(fm);
|
|
||||||
return NULL;
|
|
||||||
}
|
|
||||||
DJM(no_jffs_node_ref++);
|
|
||||||
fm->nodes->node = node;
|
|
||||||
fm->nodes->next = NULL;
|
|
||||||
fmc->used_size += size;
|
|
||||||
fmc->free_size -= size;
|
|
||||||
}
|
|
||||||
else {
|
|
||||||
/* If there is no node, then this is just a chunk of dirt. */
|
|
||||||
fmc->dirty_size += size;
|
|
||||||
fmc->free_size -= size;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (fmc->head_extra) {
|
|
||||||
fm->prev = fmc->tail_extra;
|
|
||||||
fmc->tail_extra->next = fm;
|
|
||||||
fmc->tail_extra = fm;
|
|
||||||
}
|
|
||||||
else if (!fmc->head) {
|
|
||||||
fmc->head = fm;
|
|
||||||
fmc->tail = fm;
|
|
||||||
}
|
|
||||||
else if (fmc->tail->offset + fmc->tail->size < offset) {
|
|
||||||
fmc->head_extra = fm;
|
|
||||||
fmc->tail_extra = fm;
|
|
||||||
}
|
|
||||||
else {
|
|
||||||
fm->prev = fmc->tail;
|
|
||||||
fmc->tail->next = fm;
|
|
||||||
fmc->tail = fm;
|
|
||||||
}
|
|
||||||
D3(jffs_print_fmcontrol(fmc));
|
|
||||||
D3(jffs_print_fm(fm));
|
|
||||||
return fm;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/* Add a new node to an already existing jffs_fm struct. */
|
|
||||||
int
|
|
||||||
jffs_add_node(struct jffs_node *node)
|
|
||||||
{
|
|
||||||
struct jffs_node_ref *ref;
|
|
||||||
|
|
||||||
D3(printk("jffs_add_node(): ino = %u\n", node->ino));
|
|
||||||
|
|
||||||
ref = kmalloc(sizeof(*ref), GFP_KERNEL);
|
|
||||||
if (!ref)
|
|
||||||
return -ENOMEM;
|
|
||||||
|
|
||||||
DJM(no_jffs_node_ref++);
|
|
||||||
ref->node = node;
|
|
||||||
ref->next = node->fm->nodes;
|
|
||||||
node->fm->nodes = ref;
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/* Free a part of some allocated space. */
|
|
||||||
void
|
|
||||||
jffs_fmfree_partly(struct jffs_fmcontrol *fmc, struct jffs_fm *fm, __u32 size)
|
|
||||||
{
|
|
||||||
D1(printk("***jffs_fmfree_partly(): fm = 0x%p, fm->nodes = 0x%p, "
|
|
||||||
"fm->nodes->node->ino = %u, size = %u\n",
|
|
||||||
fm, (fm ? fm->nodes : 0),
|
|
||||||
(!fm ? 0 : (!fm->nodes ? 0 : fm->nodes->node->ino)), size));
|
|
||||||
|
|
||||||
if (fm->nodes) {
|
|
||||||
kfree(fm->nodes);
|
|
||||||
DJM(no_jffs_node_ref--);
|
|
||||||
fm->nodes = NULL;
|
|
||||||
}
|
|
||||||
fmc->used_size -= fm->size;
|
|
||||||
if (fm == fmc->tail) {
|
|
||||||
fm->size -= size;
|
|
||||||
fmc->free_size += size;
|
|
||||||
}
|
|
||||||
fmc->dirty_size += fm->size;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/* Find the jffs_fm struct that contains the end of the data chunk that
|
|
||||||
begins at the logical beginning of the flash memory and spans `size'
|
|
||||||
bytes. If we want to erase a sector of the flash memory, we use this
|
|
||||||
function to find where the sector limit cuts a chunk of data. */
|
|
||||||
struct jffs_fm *
|
|
||||||
jffs_cut_node(struct jffs_fmcontrol *fmc, __u32 size)
|
|
||||||
{
|
|
||||||
struct jffs_fm *fm;
|
|
||||||
__u32 pos = 0;
|
|
||||||
|
|
||||||
if (size == 0) {
|
|
||||||
return NULL;
|
|
||||||
}
|
|
||||||
|
|
||||||
ASSERT(if (!fmc) {
|
|
||||||
printk(KERN_ERR "jffs_cut_node(): fmc == NULL\n");
|
|
||||||
return NULL;
|
|
||||||
});
|
|
||||||
|
|
||||||
fm = fmc->head;
|
|
||||||
|
|
||||||
while (fm) {
|
|
||||||
pos += fm->size;
|
|
||||||
if (pos < size) {
|
|
||||||
fm = fm->next;
|
|
||||||
}
|
|
||||||
else if (pos > size) {
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
else {
|
|
||||||
fm = NULL;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
return fm;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/* Move the head of the fmc structures and delete the obsolete parts. */
|
|
||||||
void
|
|
||||||
jffs_sync_erase(struct jffs_fmcontrol *fmc, int erased_size)
|
|
||||||
{
|
|
||||||
struct jffs_fm *fm;
|
|
||||||
struct jffs_fm *del;
|
|
||||||
|
|
||||||
ASSERT(if (!fmc) {
|
|
||||||
printk(KERN_ERR "jffs_sync_erase(): fmc == NULL\n");
|
|
||||||
return;
|
|
||||||
});
|
|
||||||
|
|
||||||
fmc->dirty_size -= erased_size;
|
|
||||||
fmc->free_size += erased_size;
|
|
||||||
|
|
||||||
for (fm = fmc->head; fm && (erased_size > 0);) {
|
|
||||||
if (erased_size >= fm->size) {
|
|
||||||
erased_size -= fm->size;
|
|
||||||
del = fm;
|
|
||||||
fm = fm->next;
|
|
||||||
fm->prev = NULL;
|
|
||||||
fmc->head = fm;
|
|
||||||
jffs_free_fm(del);
|
|
||||||
}
|
|
||||||
else {
|
|
||||||
fm->size -= erased_size;
|
|
||||||
fm->offset += erased_size;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/* Return the oldest used node in the flash memory. */
|
|
||||||
struct jffs_node *
|
|
||||||
jffs_get_oldest_node(struct jffs_fmcontrol *fmc)
|
|
||||||
{
|
|
||||||
struct jffs_fm *fm;
|
|
||||||
struct jffs_node_ref *nref;
|
|
||||||
struct jffs_node *node = NULL;
|
|
||||||
|
|
||||||
ASSERT(if (!fmc) {
|
|
||||||
printk(KERN_ERR "jffs_get_oldest_node(): fmc == NULL\n");
|
|
||||||
return NULL;
|
|
||||||
});
|
|
||||||
|
|
||||||
for (fm = fmc->head; fm && !fm->nodes; fm = fm->next);
|
|
||||||
|
|
||||||
if (!fm) {
|
|
||||||
return NULL;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* The oldest node is the last one in the reference list. This list
|
|
||||||
shouldn't be too long; just one or perhaps two elements. */
|
|
||||||
for (nref = fm->nodes; nref; nref = nref->next) {
|
|
||||||
node = nref->node;
|
|
||||||
}
|
|
||||||
|
|
||||||
D2(printk("jffs_get_oldest_node(): ino = %u, version = %u\n",
|
|
||||||
(node ? node->ino : 0), (node ? node->version : 0)));
|
|
||||||
|
|
||||||
return node;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
#if defined(JFFS_MARK_OBSOLETE) && JFFS_MARK_OBSOLETE
|
|
||||||
|
|
||||||
/* Mark an on-flash node as obsolete.
|
|
||||||
|
|
||||||
Note that this is just an optimization that isn't necessary for the
|
|
||||||
filesystem to work. */
|
|
||||||
|
|
||||||
static int
|
|
||||||
jffs_mark_obsolete(struct jffs_fmcontrol *fmc, __u32 fm_offset)
|
|
||||||
{
|
|
||||||
/* The `accurate_pos' holds the position of the accurate byte
|
|
||||||
in the jffs_raw_inode structure that we are going to mark
|
|
||||||
as obsolete. */
|
|
||||||
__u32 accurate_pos = fm_offset + JFFS_RAW_INODE_ACCURATE_OFFSET;
|
|
||||||
unsigned char zero = 0x00;
|
|
||||||
size_t len;
|
|
||||||
|
|
||||||
D3(printk("jffs_mark_obsolete(): accurate_pos = %u\n", accurate_pos));
|
|
||||||
ASSERT(if (!fmc) {
|
|
||||||
printk(KERN_ERR "jffs_mark_obsolete(): fmc == NULL\n");
|
|
||||||
return -1;
|
|
||||||
});
|
|
||||||
|
|
||||||
/* Write 0x00 to the raw inode's accurate member. Don't care
|
|
||||||
about the return value. */
|
|
||||||
MTD_WRITE(fmc->mtd, accurate_pos, 1, &len, &zero);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
#endif /* JFFS_MARK_OBSOLETE */
|
|
||||||
|
|
||||||
/* check if it's possible to erase the wanted range, and if not, return
|
|
||||||
* the range that IS erasable, or a negative error code.
|
|
||||||
*/
|
|
||||||
static long
|
|
||||||
jffs_flash_erasable_size(struct mtd_info *mtd, __u32 offset, __u32 size)
|
|
||||||
{
|
|
||||||
u_long ssize;
|
|
||||||
|
|
||||||
/* assume that sector size for a partition is constant even
|
|
||||||
* if it spans more than one chip (you usually put the same
|
|
||||||
* type of chips in a system)
|
|
||||||
*/
|
|
||||||
|
|
||||||
ssize = mtd->erasesize;
|
|
||||||
|
|
||||||
if (offset % ssize) {
|
|
||||||
printk(KERN_WARNING "jffs_flash_erasable_size() given non-aligned offset %x (erasesize %lx)\n", offset, ssize);
|
|
||||||
/* The offset is not sector size aligned. */
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
else if (offset > mtd->size) {
|
|
||||||
printk(KERN_WARNING "jffs_flash_erasable_size given offset off the end of device (%x > %x)\n", offset, mtd->size);
|
|
||||||
return -2;
|
|
||||||
}
|
|
||||||
else if (offset + size > mtd->size) {
|
|
||||||
printk(KERN_WARNING "jffs_flash_erasable_size() given length which runs off the end of device (ofs %x + len %x = %x, > %x)\n", offset,size, offset+size, mtd->size);
|
|
||||||
return -3;
|
|
||||||
}
|
|
||||||
|
|
||||||
return (size / ssize) * ssize;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/* How much dirty flash memory is possible to erase at the moment? */
|
|
||||||
long
|
|
||||||
jffs_erasable_size(struct jffs_fmcontrol *fmc)
|
|
||||||
{
|
|
||||||
struct jffs_fm *fm;
|
|
||||||
__u32 size = 0;
|
|
||||||
long ret;
|
|
||||||
|
|
||||||
ASSERT(if (!fmc) {
|
|
||||||
printk(KERN_ERR "jffs_erasable_size(): fmc = NULL\n");
|
|
||||||
return -1;
|
|
||||||
});
|
|
||||||
|
|
||||||
if (!fmc->head) {
|
|
||||||
/* The flash memory is totally empty. No nodes. No dirt.
|
|
||||||
Just return. */
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Calculate how much space that is dirty. */
|
|
||||||
for (fm = fmc->head; fm && !fm->nodes; fm = fm->next) {
|
|
||||||
if (size && fm->offset == 0) {
|
|
||||||
/* We have reached the beginning of the flash. */
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
size += fm->size;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Someone's signature contained this:
|
|
||||||
There's a fine line between fishing and just standing on
|
|
||||||
the shore like an idiot... */
|
|
||||||
ret = jffs_flash_erasable_size(fmc->mtd, fmc->head->offset, size);
|
|
||||||
|
|
||||||
ASSERT(if (ret < 0) {
|
|
||||||
printk("jffs_erasable_size: flash_erasable_size() "
|
|
||||||
"returned something less than zero (%ld).\n", ret);
|
|
||||||
printk("jffs_erasable_size: offset = 0x%08x\n",
|
|
||||||
fmc->head->offset);
|
|
||||||
});
|
|
||||||
|
|
||||||
/* If there is dirt on the flash (which is the reason to why
|
|
||||||
this function was called in the first place) but no space is
|
|
||||||
possible to erase right now, the initial part of the list of
|
|
||||||
jffs_fm structs, that hold place for dirty space, could perhaps
|
|
||||||
be shortened. The list's initial "dirty" elements are merged
|
|
||||||
into just one large dirty jffs_fm struct. This operation must
|
|
||||||
only be performed if nothing is possible to erase. Otherwise,
|
|
||||||
jffs_clear_end_of_node() won't work as expected. */
|
|
||||||
if (ret == 0) {
|
|
||||||
struct jffs_fm *head = fmc->head;
|
|
||||||
struct jffs_fm *del;
|
|
||||||
/* While there are two dirty nodes beside each other.*/
|
|
||||||
while (head->nodes == 0
|
|
||||||
&& head->next
|
|
||||||
&& head->next->nodes == 0) {
|
|
||||||
del = head->next;
|
|
||||||
head->size += del->size;
|
|
||||||
head->next = del->next;
|
|
||||||
if (del->next) {
|
|
||||||
del->next->prev = head;
|
|
||||||
}
|
|
||||||
jffs_free_fm(del);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
return (ret >= 0 ? ret : 0);
|
|
||||||
}
|
|
||||||
|
|
||||||
static struct jffs_fm *jffs_alloc_fm(void)
|
|
||||||
{
|
|
||||||
struct jffs_fm *fm;
|
|
||||||
|
|
||||||
fm = kmem_cache_alloc(fm_cache,GFP_KERNEL);
|
|
||||||
DJM(if (fm) no_jffs_fm++;);
|
|
||||||
|
|
||||||
return fm;
|
|
||||||
}
|
|
||||||
|
|
||||||
static void jffs_free_fm(struct jffs_fm *n)
|
|
||||||
{
|
|
||||||
kmem_cache_free(fm_cache,n);
|
|
||||||
DJM(no_jffs_fm--);
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
struct jffs_node *jffs_alloc_node(void)
|
|
||||||
{
|
|
||||||
struct jffs_node *n;
|
|
||||||
|
|
||||||
n = (struct jffs_node *)kmem_cache_alloc(node_cache,GFP_KERNEL);
|
|
||||||
if(n != NULL)
|
|
||||||
no_jffs_node++;
|
|
||||||
return n;
|
|
||||||
}
|
|
||||||
|
|
||||||
void jffs_free_node(struct jffs_node *n)
|
|
||||||
{
|
|
||||||
kmem_cache_free(node_cache,n);
|
|
||||||
no_jffs_node--;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
int jffs_get_node_inuse(void)
|
|
||||||
{
|
|
||||||
return no_jffs_node;
|
|
||||||
}
|
|
||||||
|
|
@ -1,149 +0,0 @@
|
||||||
/*
|
|
||||||
* JFFS -- Journaling Flash File System, Linux implementation.
|
|
||||||
*
|
|
||||||
* Copyright (C) 1999, 2000 Axis Communications AB.
|
|
||||||
*
|
|
||||||
* Created by Finn Hakansson <finn@axis.com>.
|
|
||||||
*
|
|
||||||
* This is free software; you can redistribute it and/or modify it
|
|
||||||
* under the terms of the GNU General Public License as published by
|
|
||||||
* the Free Software Foundation; either version 2 of the License, or
|
|
||||||
* (at your option) any later version.
|
|
||||||
*
|
|
||||||
* $Id: jffs_fm.h,v 1.13 2001/01/11 12:03:25 dwmw2 Exp $
|
|
||||||
*
|
|
||||||
* Ported to Linux 2.3.x and MTD:
|
|
||||||
* Copyright (C) 2000 Alexander Larsson (alex@cendio.se), Cendio Systems AB
|
|
||||||
*
|
|
||||||
*/
|
|
||||||
|
|
||||||
#ifndef __LINUX_JFFS_FM_H__
|
|
||||||
#define __LINUX_JFFS_FM_H__
|
|
||||||
|
|
||||||
#include <linux/types.h>
|
|
||||||
#include <linux/jffs.h>
|
|
||||||
#include <linux/mtd/mtd.h>
|
|
||||||
#include <linux/mutex.h>
|
|
||||||
|
|
||||||
/* The alignment between two nodes in the flash memory. */
|
|
||||||
#define JFFS_ALIGN_SIZE 4
|
|
||||||
|
|
||||||
/* Mark the on-flash space as obsolete when appropriate. */
|
|
||||||
#define JFFS_MARK_OBSOLETE 0
|
|
||||||
|
|
||||||
#ifndef CONFIG_JFFS_FS_VERBOSE
|
|
||||||
#define CONFIG_JFFS_FS_VERBOSE 1
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#if CONFIG_JFFS_FS_VERBOSE > 0
|
|
||||||
#define D(x) x
|
|
||||||
#define D1(x) D(x)
|
|
||||||
#else
|
|
||||||
#define D(x)
|
|
||||||
#define D1(x)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#if CONFIG_JFFS_FS_VERBOSE > 1
|
|
||||||
#define D2(x) D(x)
|
|
||||||
#else
|
|
||||||
#define D2(x)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#if CONFIG_JFFS_FS_VERBOSE > 2
|
|
||||||
#define D3(x) D(x)
|
|
||||||
#else
|
|
||||||
#define D3(x)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#define ASSERT(x) x
|
|
||||||
|
|
||||||
/* How many padding bytes should be inserted between two chunks of data
|
|
||||||
on the flash? */
|
|
||||||
#define JFFS_GET_PAD_BYTES(size) ( (JFFS_ALIGN_SIZE-1) & -(__u32)(size) )
|
|
||||||
#define JFFS_PAD(size) ( (size + (JFFS_ALIGN_SIZE-1)) & ~(JFFS_ALIGN_SIZE-1) )
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
struct jffs_node_ref
|
|
||||||
{
|
|
||||||
struct jffs_node *node;
|
|
||||||
struct jffs_node_ref *next;
|
|
||||||
};
|
|
||||||
|
|
||||||
|
|
||||||
/* The struct jffs_fm represents a chunk of data in the flash memory. */
|
|
||||||
struct jffs_fm
|
|
||||||
{
|
|
||||||
__u32 offset;
|
|
||||||
__u32 size;
|
|
||||||
struct jffs_fm *prev;
|
|
||||||
struct jffs_fm *next;
|
|
||||||
struct jffs_node_ref *nodes; /* USED if != 0. */
|
|
||||||
};
|
|
||||||
|
|
||||||
struct jffs_fmcontrol
|
|
||||||
{
|
|
||||||
__u32 flash_size;
|
|
||||||
__u32 used_size;
|
|
||||||
__u32 dirty_size;
|
|
||||||
__u32 free_size;
|
|
||||||
__u32 sector_size;
|
|
||||||
__u32 min_free_size; /* The minimum free space needed to be able
|
|
||||||
to perform garbage collections. */
|
|
||||||
__u32 max_chunk_size; /* The maximum size of a chunk of data. */
|
|
||||||
struct mtd_info *mtd;
|
|
||||||
struct jffs_control *c;
|
|
||||||
struct jffs_fm *head;
|
|
||||||
struct jffs_fm *tail;
|
|
||||||
struct jffs_fm *head_extra;
|
|
||||||
struct jffs_fm *tail_extra;
|
|
||||||
struct mutex biglock;
|
|
||||||
};
|
|
||||||
|
|
||||||
/* Notice the two members head_extra and tail_extra in the jffs_control
|
|
||||||
structure above. Those are only used during the scanning of the flash
|
|
||||||
memory; while the file system is being built. If the data in the flash
|
|
||||||
memory is organized like
|
|
||||||
|
|
||||||
+----------------+------------------+----------------+
|
|
||||||
| USED / DIRTY | FREE | USED / DIRTY |
|
|
||||||
+----------------+------------------+----------------+
|
|
||||||
|
|
||||||
then the scan is split in two parts. The first scanned part of the
|
|
||||||
flash memory is organized through the members head and tail. The
|
|
||||||
second scanned part is organized with head_extra and tail_extra. When
|
|
||||||
the scan is completed, the two lists are merged together. The jffs_fm
|
|
||||||
struct that head_extra references is the logical beginning of the
|
|
||||||
flash memory so it will be referenced by the head member. */
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
struct jffs_fmcontrol *jffs_build_begin(struct jffs_control *c, int unit);
|
|
||||||
void jffs_build_end(struct jffs_fmcontrol *fmc);
|
|
||||||
void jffs_cleanup_fmcontrol(struct jffs_fmcontrol *fmc);
|
|
||||||
|
|
||||||
int jffs_fmalloc(struct jffs_fmcontrol *fmc, __u32 size,
|
|
||||||
struct jffs_node *node, struct jffs_fm **result);
|
|
||||||
int jffs_fmfree(struct jffs_fmcontrol *fmc, struct jffs_fm *fm,
|
|
||||||
struct jffs_node *node);
|
|
||||||
|
|
||||||
__u32 jffs_free_size1(struct jffs_fmcontrol *fmc);
|
|
||||||
__u32 jffs_free_size2(struct jffs_fmcontrol *fmc);
|
|
||||||
void jffs_sync_erase(struct jffs_fmcontrol *fmc, int erased_size);
|
|
||||||
struct jffs_fm *jffs_cut_node(struct jffs_fmcontrol *fmc, __u32 size);
|
|
||||||
struct jffs_node *jffs_get_oldest_node(struct jffs_fmcontrol *fmc);
|
|
||||||
long jffs_erasable_size(struct jffs_fmcontrol *fmc);
|
|
||||||
struct jffs_fm *jffs_fmalloced(struct jffs_fmcontrol *fmc, __u32 offset,
|
|
||||||
__u32 size, struct jffs_node *node);
|
|
||||||
int jffs_add_node(struct jffs_node *node);
|
|
||||||
void jffs_fmfree_partly(struct jffs_fmcontrol *fmc, struct jffs_fm *fm,
|
|
||||||
__u32 size);
|
|
||||||
|
|
||||||
#if CONFIG_JFFS_FS_VERBOSE > 0
|
|
||||||
void jffs_print_fmcontrol(struct jffs_fmcontrol *fmc);
|
|
||||||
#endif
|
|
||||||
#if 0
|
|
||||||
void jffs_print_node_ref(struct jffs_node_ref *ref);
|
|
||||||
#endif /* 0 */
|
|
||||||
|
|
||||||
#endif /* __LINUX_JFFS_FM_H__ */
|
|
||||||
|
|
@ -1,261 +0,0 @@
|
||||||
/*
|
|
||||||
* JFFS -- Journaling Flash File System, Linux implementation.
|
|
||||||
*
|
|
||||||
* Copyright (C) 2000 Axis Communications AB.
|
|
||||||
*
|
|
||||||
* Created by Simon Kagstrom <simonk@axis.com>.
|
|
||||||
*
|
|
||||||
* $Id: jffs_proc.c,v 1.5 2001/06/02 14:34:55 dwmw2 Exp $
|
|
||||||
*
|
|
||||||
* This is free software; you can redistribute it and/or modify it
|
|
||||||
* under the terms of the GNU General Public License as published by
|
|
||||||
* the Free Software Foundation; either version 2 of the License, or
|
|
||||||
* (at your option) any later version.
|
|
||||||
*
|
|
||||||
* Overview:
|
|
||||||
* This file defines JFFS partition entries in the proc file system.
|
|
||||||
*
|
|
||||||
* TODO:
|
|
||||||
* Create some more proc files for different kinds of info, i.e. statistics
|
|
||||||
* about written and read bytes, number of calls to different routines,
|
|
||||||
* reports about failures.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include <linux/errno.h>
|
|
||||||
#include <linux/fs.h>
|
|
||||||
#include <linux/jffs.h>
|
|
||||||
#include <linux/slab.h>
|
|
||||||
#include <linux/proc_fs.h>
|
|
||||||
#include <linux/time.h>
|
|
||||||
#include <linux/types.h>
|
|
||||||
#include "jffs_fm.h"
|
|
||||||
#include "jffs_proc.h"
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Structure for a JFFS partition in the system
|
|
||||||
*/
|
|
||||||
struct jffs_partition_dir {
|
|
||||||
struct jffs_control *c;
|
|
||||||
struct proc_dir_entry *part_root;
|
|
||||||
struct proc_dir_entry *part_info;
|
|
||||||
struct proc_dir_entry *part_layout;
|
|
||||||
struct jffs_partition_dir *next;
|
|
||||||
};
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Structure for top-level entry in '/proc/fs' directory
|
|
||||||
*/
|
|
||||||
struct proc_dir_entry *jffs_proc_root;
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Linked list of 'jffs_partition_dirs' to help us track
|
|
||||||
* the mounted JFFS partitions in the system
|
|
||||||
*/
|
|
||||||
static struct jffs_partition_dir *jffs_part_dirs;
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Read functions for entries
|
|
||||||
*/
|
|
||||||
static int jffs_proc_info_read(char *page, char **start, off_t off,
|
|
||||||
int count, int *eof, void *data);
|
|
||||||
static int jffs_proc_layout_read (char *page, char **start, off_t off,
|
|
||||||
int count, int *eof, void *data);
|
|
||||||
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Register a JFFS partition directory (called upon mount)
|
|
||||||
*/
|
|
||||||
int jffs_register_jffs_proc_dir(int mtd, struct jffs_control *c)
|
|
||||||
{
|
|
||||||
struct jffs_partition_dir *part_dir;
|
|
||||||
struct proc_dir_entry *part_info = NULL;
|
|
||||||
struct proc_dir_entry *part_layout = NULL;
|
|
||||||
struct proc_dir_entry *part_root = NULL;
|
|
||||||
char name[10];
|
|
||||||
|
|
||||||
sprintf(name, "%d", mtd);
|
|
||||||
/* Allocate structure for local JFFS partition table */
|
|
||||||
part_dir = (struct jffs_partition_dir *)
|
|
||||||
kmalloc(sizeof (struct jffs_partition_dir), GFP_KERNEL);
|
|
||||||
if (!part_dir)
|
|
||||||
goto out;
|
|
||||||
|
|
||||||
/* Create entry for this partition */
|
|
||||||
part_root = proc_mkdir(name, jffs_proc_root);
|
|
||||||
if (!part_root)
|
|
||||||
goto out1;
|
|
||||||
|
|
||||||
/* Create entry for 'info' file */
|
|
||||||
part_info = create_proc_entry ("info", 0, part_root);
|
|
||||||
if (!part_info)
|
|
||||||
goto out2;
|
|
||||||
part_info->read_proc = jffs_proc_info_read;
|
|
||||||
part_info->data = (void *) c;
|
|
||||||
|
|
||||||
/* Create entry for 'layout' file */
|
|
||||||
part_layout = create_proc_entry ("layout", 0, part_root);
|
|
||||||
if (!part_layout)
|
|
||||||
goto out3;
|
|
||||||
part_layout->read_proc = jffs_proc_layout_read;
|
|
||||||
part_layout->data = (void *) c;
|
|
||||||
|
|
||||||
/* Fill in structure for table and insert in the list */
|
|
||||||
part_dir->c = c;
|
|
||||||
part_dir->part_root = part_root;
|
|
||||||
part_dir->part_info = part_info;
|
|
||||||
part_dir->part_layout = part_layout;
|
|
||||||
part_dir->next = jffs_part_dirs;
|
|
||||||
jffs_part_dirs = part_dir;
|
|
||||||
|
|
||||||
/* Return happy */
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
out3:
|
|
||||||
remove_proc_entry("info", part_root);
|
|
||||||
out2:
|
|
||||||
remove_proc_entry(name, jffs_proc_root);
|
|
||||||
out1:
|
|
||||||
kfree(part_dir);
|
|
||||||
out:
|
|
||||||
return -ENOMEM;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Unregister a JFFS partition directory (called at umount)
|
|
||||||
*/
|
|
||||||
int jffs_unregister_jffs_proc_dir(struct jffs_control *c)
|
|
||||||
{
|
|
||||||
struct jffs_partition_dir *part_dir = jffs_part_dirs;
|
|
||||||
struct jffs_partition_dir *prev_part_dir = NULL;
|
|
||||||
|
|
||||||
while (part_dir) {
|
|
||||||
if (part_dir->c == c) {
|
|
||||||
/* Remove entries for partition */
|
|
||||||
remove_proc_entry (part_dir->part_info->name,
|
|
||||||
part_dir->part_root);
|
|
||||||
remove_proc_entry (part_dir->part_layout->name,
|
|
||||||
part_dir->part_root);
|
|
||||||
remove_proc_entry (part_dir->part_root->name,
|
|
||||||
jffs_proc_root);
|
|
||||||
|
|
||||||
/* Remove entry from list */
|
|
||||||
if (prev_part_dir)
|
|
||||||
prev_part_dir->next = part_dir->next;
|
|
||||||
else
|
|
||||||
jffs_part_dirs = part_dir->next;
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Check to see if this is the last one
|
|
||||||
* and remove the entry from '/proc/fs'
|
|
||||||
* if it is.
|
|
||||||
*/
|
|
||||||
if (jffs_part_dirs == part_dir->next)
|
|
||||||
remove_proc_entry ("jffs", proc_root_fs);
|
|
||||||
|
|
||||||
/* Free memory for entry */
|
|
||||||
kfree(part_dir);
|
|
||||||
|
|
||||||
/* Return happy */
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Move to next entry */
|
|
||||||
prev_part_dir = part_dir;
|
|
||||||
part_dir = part_dir->next;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Return unhappy */
|
|
||||||
return -1;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Read a JFFS partition's `info' file
|
|
||||||
*/
|
|
||||||
static int jffs_proc_info_read (char *page, char **start, off_t off,
|
|
||||||
int count, int *eof, void *data)
|
|
||||||
{
|
|
||||||
struct jffs_control *c = (struct jffs_control *) data;
|
|
||||||
int len = 0;
|
|
||||||
|
|
||||||
/* Get information on the parition */
|
|
||||||
len += sprintf (page,
|
|
||||||
"partition size: %08lX (%u)\n"
|
|
||||||
"sector size: %08lX (%u)\n"
|
|
||||||
"used size: %08lX (%u)\n"
|
|
||||||
"dirty size: %08lX (%u)\n"
|
|
||||||
"free size: %08lX (%u)\n\n",
|
|
||||||
(unsigned long) c->fmc->flash_size, c->fmc->flash_size,
|
|
||||||
(unsigned long) c->fmc->sector_size, c->fmc->sector_size,
|
|
||||||
(unsigned long) c->fmc->used_size, c->fmc->used_size,
|
|
||||||
(unsigned long) c->fmc->dirty_size, c->fmc->dirty_size,
|
|
||||||
(unsigned long) (c->fmc->flash_size -
|
|
||||||
(c->fmc->used_size + c->fmc->dirty_size)),
|
|
||||||
c->fmc->flash_size - (c->fmc->used_size + c->fmc->dirty_size));
|
|
||||||
|
|
||||||
/* We're done */
|
|
||||||
*eof = 1;
|
|
||||||
|
|
||||||
/* Return length */
|
|
||||||
return len;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Read a JFFS partition's `layout' file
|
|
||||||
*/
|
|
||||||
static int jffs_proc_layout_read (char *page, char **start, off_t off,
|
|
||||||
int count, int *eof, void *data)
|
|
||||||
{
|
|
||||||
struct jffs_control *c = (struct jffs_control *) data;
|
|
||||||
struct jffs_fm *fm = NULL;
|
|
||||||
struct jffs_fm *last_fm = NULL;
|
|
||||||
int len = 0;
|
|
||||||
|
|
||||||
/* Get the first item in the list */
|
|
||||||
fm = c->fmc->head;
|
|
||||||
|
|
||||||
/* Print free space */
|
|
||||||
if (fm && fm->offset) {
|
|
||||||
len += sprintf (page, "00000000 %08lX free\n",
|
|
||||||
(unsigned long) fm->offset);
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Loop through all of the flash control structures */
|
|
||||||
while (fm && (len < (off + count))) {
|
|
||||||
if (fm->nodes) {
|
|
||||||
len += sprintf (page + len,
|
|
||||||
"%08lX %08lX ino=%08lX, ver=%08lX\n",
|
|
||||||
(unsigned long) fm->offset,
|
|
||||||
(unsigned long) fm->size,
|
|
||||||
(unsigned long) fm->nodes->node->ino,
|
|
||||||
(unsigned long) fm->nodes->node->version);
|
|
||||||
}
|
|
||||||
else {
|
|
||||||
len += sprintf (page + len,
|
|
||||||
"%08lX %08lX dirty\n",
|
|
||||||
(unsigned long) fm->offset,
|
|
||||||
(unsigned long) fm->size);
|
|
||||||
}
|
|
||||||
last_fm = fm;
|
|
||||||
fm = fm->next;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Print free space */
|
|
||||||
if ((len < (off + count)) && last_fm
|
|
||||||
&& (last_fm->offset < c->fmc->flash_size)) {
|
|
||||||
len += sprintf (page + len,
|
|
||||||
"%08lX %08lX free\n",
|
|
||||||
(unsigned long) last_fm->offset +
|
|
||||||
last_fm->size,
|
|
||||||
(unsigned long) (c->fmc->flash_size -
|
|
||||||
(last_fm->offset + last_fm->size)));
|
|
||||||
}
|
|
||||||
|
|
||||||
/* We're done */
|
|
||||||
*eof = 1;
|
|
||||||
|
|
||||||
/* Return length */
|
|
||||||
return len;
|
|
||||||
}
|
|
||||||
|
|
@ -1,28 +0,0 @@
|
||||||
/*
|
|
||||||
* JFFS -- Journaling Flash File System, Linux implementation.
|
|
||||||
*
|
|
||||||
* Copyright (C) 2000 Axis Communications AB.
|
|
||||||
*
|
|
||||||
* Created by Simon Kagstrom <simonk@axis.com>.
|
|
||||||
*
|
|
||||||
* This is free software; you can redistribute it and/or modify it
|
|
||||||
* under the terms of the GNU General Public License as published by
|
|
||||||
* the Free Software Foundation; either version 2 of the License, or
|
|
||||||
* (at your option) any later version.
|
|
||||||
*
|
|
||||||
* $Id: jffs_proc.h,v 1.2 2000/11/15 22:04:12 sjhill Exp $
|
|
||||||
*/
|
|
||||||
|
|
||||||
/* jffs_proc.h defines a structure for inclusion in the proc-file system. */
|
|
||||||
#ifndef __LINUX_JFFS_PROC_H__
|
|
||||||
#define __LINUX_JFFS_PROC_H__
|
|
||||||
|
|
||||||
#include <linux/proc_fs.h>
|
|
||||||
|
|
||||||
/* The proc_dir_entry for jffs (defined in jffs_proc.c). */
|
|
||||||
extern struct proc_dir_entry *jffs_proc_root;
|
|
||||||
|
|
||||||
int jffs_register_jffs_proc_dir(int mtd, struct jffs_control *c);
|
|
||||||
int jffs_unregister_jffs_proc_dir(struct jffs_control *c);
|
|
||||||
|
|
||||||
#endif /* __LINUX_JFFS_PROC_H__ */
|
|
||||||
|
|
@ -1,224 +0,0 @@
|
||||||
/*
|
|
||||||
* JFFS -- Journalling Flash File System, Linux implementation.
|
|
||||||
*
|
|
||||||
* Copyright (C) 1999, 2000 Axis Communications AB.
|
|
||||||
*
|
|
||||||
* Created by Finn Hakansson <finn@axis.com>.
|
|
||||||
*
|
|
||||||
* This is free software; you can redistribute it and/or modify it
|
|
||||||
* under the terms of the GNU General Public License as published by
|
|
||||||
* the Free Software Foundation; either version 2 of the License, or
|
|
||||||
* (at your option) any later version.
|
|
||||||
*
|
|
||||||
* $Id: jffs.h,v 1.20 2001/09/18 21:33:37 dwmw2 Exp $
|
|
||||||
*
|
|
||||||
* Ported to Linux 2.3.x and MTD:
|
|
||||||
* Copyright (C) 2000 Alexander Larsson (alex@cendio.se), Cendio Systems AB
|
|
||||||
*
|
|
||||||
*/
|
|
||||||
|
|
||||||
#ifndef __LINUX_JFFS_H__
|
|
||||||
#define __LINUX_JFFS_H__
|
|
||||||
|
|
||||||
#include <linux/types.h>
|
|
||||||
#include <linux/completion.h>
|
|
||||||
|
|
||||||
#define JFFS_VERSION_STRING "1.0"
|
|
||||||
|
|
||||||
/* This is a magic number that is used as an identification number for
|
|
||||||
this file system. It is written to the super_block structure. */
|
|
||||||
#define JFFS_MAGIC_SB_BITMASK 0x07c0 /* 1984 */
|
|
||||||
|
|
||||||
/* This is a magic number that every on-flash raw inode begins with. */
|
|
||||||
#define JFFS_MAGIC_BITMASK 0x34383931 /* "1984" */
|
|
||||||
|
|
||||||
/* These two bitmasks are the valid ones for the flash memories we have
|
|
||||||
for the moment. */
|
|
||||||
#define JFFS_EMPTY_BITMASK 0xffffffff
|
|
||||||
#define JFFS_DIRTY_BITMASK 0x00000000
|
|
||||||
|
|
||||||
/* This is the inode number of the root node. */
|
|
||||||
#define JFFS_MIN_INO 1
|
|
||||||
|
|
||||||
/* How many slots in the file hash table should we have? */
|
|
||||||
#define JFFS_HASH_SIZE 40
|
|
||||||
|
|
||||||
/* Don't use more than 254 bytes as the maximum allowed length of a file's
|
|
||||||
name due to errors that could occur during the scanning of the flash
|
|
||||||
memory. In fact, a name length of 255 or 0xff, could be the result of
|
|
||||||
an uncompleted write. For instance, if a raw inode is written to the
|
|
||||||
flash memory and there is a power lossage just before the length of
|
|
||||||
the name is written, the length 255 would be interpreted as an illegal
|
|
||||||
value. */
|
|
||||||
#define JFFS_MAX_NAME_LEN 254
|
|
||||||
|
|
||||||
/* Commands for ioctl(). */
|
|
||||||
#define JFFS_IOCTL_MAGIC 't'
|
|
||||||
#define JFFS_PRINT_HASH _IO(JFFS_IOCTL_MAGIC, 90)
|
|
||||||
#define JFFS_PRINT_TREE _IO(JFFS_IOCTL_MAGIC, 91)
|
|
||||||
#define JFFS_GET_STATUS _IO(JFFS_IOCTL_MAGIC, 92)
|
|
||||||
|
|
||||||
/* XXX: This is something that we should try to get rid of in the future. */
|
|
||||||
#define JFFS_MODIFY_INODE 0x01
|
|
||||||
#define JFFS_MODIFY_NAME 0x02
|
|
||||||
#define JFFS_MODIFY_DATA 0x04
|
|
||||||
#define JFFS_MODIFY_EXIST 0x08
|
|
||||||
|
|
||||||
struct jffs_control;
|
|
||||||
|
|
||||||
/* The JFFS raw inode structure: Used for storage on physical media. */
|
|
||||||
/* Perhaps the uid, gid, atime, mtime and ctime members should have
|
|
||||||
more space due to future changes in the Linux kernel. Anyhow, since
|
|
||||||
a user of this filesystem probably have to fix a large number of
|
|
||||||
other things, we have decided to not be forward compatible. */
|
|
||||||
struct jffs_raw_inode
|
|
||||||
{
|
|
||||||
__u32 magic; /* A constant magic number. */
|
|
||||||
__u32 ino; /* Inode number. */
|
|
||||||
__u32 pino; /* Parent's inode number. */
|
|
||||||
__u32 version; /* Version number. */
|
|
||||||
__u32 mode; /* The file's type or mode. */
|
|
||||||
__u16 uid; /* The file's owner. */
|
|
||||||
__u16 gid; /* The file's group. */
|
|
||||||
__u32 atime; /* Last access time. */
|
|
||||||
__u32 mtime; /* Last modification time. */
|
|
||||||
__u32 ctime; /* Creation time. */
|
|
||||||
__u32 offset; /* Where to begin to write. */
|
|
||||||
__u32 dsize; /* Size of the node's data. */
|
|
||||||
__u32 rsize; /* How much are going to be replaced? */
|
|
||||||
__u8 nsize; /* Name length. */
|
|
||||||
__u8 nlink; /* Number of links. */
|
|
||||||
__u8 spare : 6; /* For future use. */
|
|
||||||
__u8 rename : 1; /* Rename to a name of an already existing file? */
|
|
||||||
__u8 deleted : 1; /* Has this file been deleted? */
|
|
||||||
__u8 accurate; /* The inode is obsolete if accurate == 0. */
|
|
||||||
__u32 dchksum; /* Checksum for the data. */
|
|
||||||
__u16 nchksum; /* Checksum for the name. */
|
|
||||||
__u16 chksum; /* Checksum for the raw inode. */
|
|
||||||
};
|
|
||||||
|
|
||||||
/* Define the offset of the accurate byte in struct jffs_raw_inode. */
|
|
||||||
#define JFFS_RAW_INODE_ACCURATE_OFFSET (sizeof(struct jffs_raw_inode) \
|
|
||||||
- 2 * sizeof(__u32) - sizeof(__u8))
|
|
||||||
|
|
||||||
/* Define the offset of the chksum member in struct jffs_raw_inode. */
|
|
||||||
#define JFFS_RAW_INODE_CHKSUM_OFFSET (sizeof(struct jffs_raw_inode) \
|
|
||||||
- sizeof(__u16))
|
|
||||||
|
|
||||||
/* Define the offset of the dchksum member in struct jffs_raw_inode. */
|
|
||||||
#define JFFS_RAW_INODE_DCHKSUM_OFFSET (sizeof(struct jffs_raw_inode) \
|
|
||||||
- sizeof(__u16) - sizeof(__u16) \
|
|
||||||
- sizeof(__u32))
|
|
||||||
|
|
||||||
|
|
||||||
/* The RAM representation of the node. The names of pointers to
|
|
||||||
jffs_nodes are very often just called `n' in the source code. */
|
|
||||||
struct jffs_node
|
|
||||||
{
|
|
||||||
__u32 ino; /* Inode number. */
|
|
||||||
__u32 version; /* Version number. */
|
|
||||||
__u32 data_offset; /* Logic location of the data to insert. */
|
|
||||||
__u32 data_size; /* The amount of data this node inserts. */
|
|
||||||
__u32 removed_size; /* The amount of data that this node removes. */
|
|
||||||
__u32 fm_offset; /* Physical location of the data in the actual
|
|
||||||
flash memory data chunk. */
|
|
||||||
__u8 name_size; /* Size of the name. */
|
|
||||||
struct jffs_fm *fm; /* Physical memory information. */
|
|
||||||
struct jffs_node *version_prev;
|
|
||||||
struct jffs_node *version_next;
|
|
||||||
struct jffs_node *range_prev;
|
|
||||||
struct jffs_node *range_next;
|
|
||||||
};
|
|
||||||
|
|
||||||
|
|
||||||
/* The RAM representation of a file (plain files, directories,
|
|
||||||
links, etc.). Pointers to jffs_files are normally named `f'
|
|
||||||
in the JFFS source code. */
|
|
||||||
struct jffs_file
|
|
||||||
{
|
|
||||||
__u32 ino; /* Inode number. */
|
|
||||||
__u32 pino; /* Parent's inode number. */
|
|
||||||
__u32 mode; /* file_type, mode */
|
|
||||||
__u16 uid; /* owner */
|
|
||||||
__u16 gid; /* group */
|
|
||||||
__u32 atime; /* Last access time. */
|
|
||||||
__u32 mtime; /* Last modification time. */
|
|
||||||
__u32 ctime; /* Creation time. */
|
|
||||||
__u8 nsize; /* Name length. */
|
|
||||||
__u8 nlink; /* Number of links. */
|
|
||||||
__u8 deleted; /* Has this file been deleted? */
|
|
||||||
char *name; /* The name of this file; NULL-terminated. */
|
|
||||||
__u32 size; /* The total size of the file's data. */
|
|
||||||
__u32 highest_version; /* The highest version number of this file. */
|
|
||||||
struct jffs_control *c;
|
|
||||||
struct jffs_file *parent; /* Reference to the parent directory. */
|
|
||||||
struct jffs_file *children; /* Always NULL for plain files. */
|
|
||||||
struct jffs_file *sibling_prev; /* Siblings in the same directory. */
|
|
||||||
struct jffs_file *sibling_next;
|
|
||||||
struct list_head hash; /* hash list. */
|
|
||||||
struct jffs_node *range_head; /* The final data. */
|
|
||||||
struct jffs_node *range_tail; /* The first data. */
|
|
||||||
struct jffs_node *version_head; /* The youngest node. */
|
|
||||||
struct jffs_node *version_tail; /* The oldest node. */
|
|
||||||
};
|
|
||||||
|
|
||||||
|
|
||||||
/* This is just a definition of a simple list used for keeping track of
|
|
||||||
files deleted due to a rename. This list is only used during the
|
|
||||||
mounting of the file system and only if there have been rename operations
|
|
||||||
earlier. */
|
|
||||||
struct jffs_delete_list
|
|
||||||
{
|
|
||||||
__u32 ino;
|
|
||||||
struct jffs_delete_list *next;
|
|
||||||
};
|
|
||||||
|
|
||||||
|
|
||||||
/* A struct for the overall file system control. Pointers to
|
|
||||||
jffs_control structs are named `c' in the source code. */
|
|
||||||
struct jffs_control
|
|
||||||
{
|
|
||||||
struct super_block *sb; /* Reference to the VFS super block. */
|
|
||||||
struct jffs_file *root; /* The root directory file. */
|
|
||||||
struct list_head *hash; /* Hash table for finding files by ino. */
|
|
||||||
struct jffs_fmcontrol *fmc; /* Flash memory control structure. */
|
|
||||||
__u32 hash_len; /* The size of the hash table. */
|
|
||||||
__u32 next_ino; /* Next inode number to use for new files. */
|
|
||||||
__u16 building_fs; /* Is the file system being built right now? */
|
|
||||||
struct jffs_delete_list *delete_list; /* Track deleted files. */
|
|
||||||
pid_t thread_pid; /* GC thread's PID */
|
|
||||||
struct task_struct *gc_task; /* GC task struct */
|
|
||||||
struct completion gc_thread_comp; /* GC thread exit mutex */
|
|
||||||
__u32 gc_minfree_threshold; /* GC trigger thresholds */
|
|
||||||
__u32 gc_maxdirty_threshold;
|
|
||||||
};
|
|
||||||
|
|
||||||
|
|
||||||
/* Used to inform about flash status. */
|
|
||||||
struct jffs_flash_status
|
|
||||||
{
|
|
||||||
__u32 size;
|
|
||||||
__u32 used;
|
|
||||||
__u32 dirty;
|
|
||||||
__u32 begin;
|
|
||||||
__u32 end;
|
|
||||||
};
|
|
||||||
|
|
||||||
/* This stuff could be used for finding memory leaks. */
|
|
||||||
#define JFFS_MEMORY_DEBUG 0
|
|
||||||
|
|
||||||
extern long no_jffs_node;
|
|
||||||
#if defined(JFFS_MEMORY_DEBUG) && JFFS_MEMORY_DEBUG
|
|
||||||
extern long no_jffs_control;
|
|
||||||
extern long no_jffs_raw_inode;
|
|
||||||
extern long no_jffs_node_ref;
|
|
||||||
extern long no_jffs_fm;
|
|
||||||
extern long no_jffs_fmcontrol;
|
|
||||||
extern long no_hash;
|
|
||||||
extern long no_name;
|
|
||||||
#define DJM(x) x
|
|
||||||
#else
|
|
||||||
#define DJM(x)
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#endif /* __LINUX_JFFS_H__ */
|
|
||||||
Loading…
Reference in New Issue