/* * 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. */ #ifndef JFFS2_SUMMARY_H #define JFFS2_SUMMARY_H #include <linux/jffs2.h> #define DIRTY_SPACE(x) do { typeof(x) _x = (x); \ c->free_size -= _x; c->dirty_size += _x; \ jeb->free_size -= _x ; jeb->dirty_size += _x; \ }while(0) #define USED_SPACE(x) do { typeof(x) _x = (x); \ c->free_size -= _x; c->used_size += _x; \ jeb->free_size -= _x ; jeb->used_size += _x; \ }while(0) #define WASTED_SPACE(x) do { typeof(x) _x = (x); \ c->free_size -= _x; c->wasted_size += _x; \ jeb->free_size -= _x ; jeb->wasted_size += _x; \ }while(0) #define UNCHECKED_SPACE(x) do { typeof(x) _x = (x); \ c->free_size -= _x; c->unchecked_size += _x; \ jeb->free_size -= _x ; jeb->unchecked_size += _x; \ }while(0) #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 */ } __attribute__((packed)); 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; /* 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_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 */ } __attribute__((packed)); 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; }; struct jffs2_summary { uint32_t sum_size; uint32_t sum_num; uint32_t sum_padded; union jffs2_sum_mem *sum_list_head; union jffs2_sum_mem *sum_list_tail; }; /* 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)) #endif