/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
* Copyright (C) 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>,
* Zoltan Sogor <weth@inf.u-szeged.hu>,
* Patrik Kluba <pajko@halom.u-szeged.hu>,
* University of Szeged, Hungary
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: summary.h,v 1.2 2005/09/26 11:37:21 havasi Exp $
*
*/
#ifndef JFFS2_SUMMARY_H
#define JFFS2_SUMMARY_H
#include <linux/uio.h>
#include <linux/jffs2.h>
#define BLK_STATE_ALLFF 0
#define BLK_STATE_CLEAN 1
#define BLK_STATE_PARTDIRTY 2
#define BLK_STATE_CLEANMARKER 3
#define BLK_STATE_ALLDIRTY 4
#define BLK_STATE_BADBLOCK 5
#define JFFS2_SUMMARY_NOSUM_SIZE 0xffffffff
#define JFFS2_SUMMARY_INODE_SIZE (sizeof(struct jffs2_sum_inode_flash))
#define JFFS2_SUMMARY_DIRENT_SIZE(x) (sizeof(struct jffs2_sum_dirent_flash) + (x))
#define JFFS2_SUMMARY_XATTR_SIZE (sizeof(struct jffs2_sum_xattr_flash))
#define JFFS2_SUMMARY_XREF_SIZE (sizeof(struct jffs2_sum_xref_flash))
/* Summary structures used on flash */
struct jffs2_sum_unknown_flash
{
jint16_t nodetype; /* node type */
};
struct jffs2_sum_inode_flash
{
jint16_t nodetype; /* node type */
jint32_t inode; /* inode number */
jint32_t version; /* inode version */
jint32_t offset; /* offset on jeb */
jint32_t totlen; /* record length */
} __attribute__((packed));
struct jffs2_sum_dirent_flash
{
jint16_t nodetype; /* == JFFS_NODETYPE_DIRENT */
jint32_t totlen; /* record length */
jint32_t offset; /* offset on jeb */
jint32_t pino; /* parent inode */
jint32_t version; /* dirent version */
jint32_t ino; /* == zero for unlink */
uint8_t nsize; /* dirent name size */
uint8_t type; /* dirent type */
uint8_t name[0]; /* dirent name */
} __attribute__((packed));
struct jffs2_sum_xattr_flash
{
jint16_t nodetype; /* == JFFS2_NODETYPE_XATR */
jint32_t xid; /* xattr identifier */
jint32_t version; /* version number */
jint32_t offset; /* offset on jeb */
jint32_t totlen; /* node length */
} __attribute__((packed));
struct jffs2_sum_xref_flash
{
jint16_t nodetype; /* == JFFS2_NODETYPE_XREF */
jint32_t offset; /* offset on jeb */
} __attribute__((packed));
union jffs2_sum_flash
{
struct jffs2_sum_unknown_flash u;
struct jffs2_sum_inode_flash i;
struct jffs2_sum_dirent_flash d;
struct jffs2_sum_xattr_flash x;
struct jffs2_sum_xref_flash r;
};
/* Summary structures used in the memory */
struct jffs2_sum_unknown_mem
{
union jffs2_sum_mem *next;
jint16_t nodetype; /* node type */
};
struct jffs2_sum_inode_mem
{
union jffs2_sum_mem *next;
jint16_t nodetype; /* node type */
jint32_t inode; /* inode number */
jint32_t version; /* inode version */
jint32_t offset; /* offset on jeb */
jint32_t totlen; /* record length */
} __attribute__((packed));
struct jffs2_sum_dirent_mem
{
union jffs2_sum_mem *next;
jint16_t nodetype; /* == JFFS_NODETYPE_DIRENT */
jint32_t totlen; /* record length */
jint32_t offset; /* ofset on jeb */
jint32_t pino; /* parent inode */
jint32_t version; /* dirent version */
jint32_t ino; /* == zero for unlink */
uint8_t nsize; /* dirent name size */
uint8_t type; /* dirent type */
uint8_t name[0]; /* dirent name */
} __attribute__((packed));
struct jffs2_sum_xattr_mem
{
union jffs2_sum_mem *next;
jint16_t nodetype;
jint32_t xid;
jint32_t version;
jint32_t offset;
jint32_t totlen;
} __attribute__((packed));
struct jffs2_sum_xref_mem
{
union jffs2_sum_mem *next;
jint16_t nodetype;
jint32_t offset;
} __attribute__((packed));
union jffs2_sum_mem
{
struct jffs2_sum_unknown_mem u;
struct jffs2_sum_inode_mem i;
struct jffs2_sum_dirent_mem d;
struct jffs2_sum_xattr_mem x;
struct jffs2_sum_xref_mem r;
};
/* Summary related information stored in superblock */
struct jffs2_summary
{
uint32_t sum_size; /* collected summary information for nextblock */
uint32_t sum_num;
uint32_t sum_padded;
union jffs2_sum_mem *sum_list_head;
union jffs2_sum_mem *sum_list_tail;
jint32_t *sum_buf; /* buffer for writing out summary */
};
/* Summary marker is stored at the end of every sumarized erase block */
struct jffs2_sum_marker
{
jint32_t offset; /* offset of the summary node in the jeb */
jint32_t magic; /* == JFFS2_SUM_MAGIC */
};
#define JFFS2_SUMMARY_FRAME_SIZE (sizeof(struct jffs2_raw_summary) + sizeof(struct jffs2_sum_marker))
#ifdef CONFIG_JFFS2_SUMMARY /* SUMMARY SUPPORT ENABLED */
#define jffs2_sum_active() (1)
int jffs2_sum_init(struct jffs2_sb_info *c);
void jffs2_sum_exit(struct jffs2_sb_info *c);
void jffs2_sum_disable_collecting(struct jffs2_summary *s);
int jffs2_sum_is_disabled(struct jffs2_summary *s);
void jffs2_sum_reset_collected(struct jffs2_summary *s);
void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s);
int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs,
unsigned long count, uint32_t to);
int jffs2_sum_write_sumnode(struct jffs2_sb_info *c);
int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size);
int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri, uint32_t ofs);
int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd, uint32_t ofs);
int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs);
int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs);
int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_summary *summary, uint32_t sumlen,
uint32_t *pseudo_random);
#else /* SUMMARY DISABLED */
#define jffs2_sum_active() (0)
#define jffs2_sum_init(a) (0)
#define jffs2_sum_exit(a)
#define jffs2_sum_disable_collecting(a)
#define jffs2_sum_is_disabled(a) (0)
#define jffs2_sum_reset_collected(a)
#define jffs2_sum_add_kvec(a,b,c,d) (0)
#define jffs2_sum_move_collected(a,b)
#define jffs2_sum_write_sumnode(a) (0)
#define jffs2_sum_add_padding_mem(a,b)
#define jffs2_sum_add_inode_mem(a,b,c)
#define jffs2_sum_add_dirent_mem(a,b,c)
#define jffs2_sum_add_xattr_mem(a,b,c)
#define jffs2_sum_add_xref_mem(a,b,c)
#define jffs2_sum_scan_sumnode(a,b,c,d) (0)
#endif /* CONFIG_JFFS2_SUMMARY */
#endif /* JFFS2_SUMMARY_H */
