/* * JFFS2 -- Journalling Flash File System, Version 2. * * Copyright (C) 2004 Ferenc Havasi , * Zoltan Sogor , * Patrik Kluba , * University of Szeged, Hungary * * For licensing information, see the file 'LICENCE' in this directory. * * $Id: summary.h,v 1.4 2006/02/15 09:42:02 havasi Exp $ * */ #ifndef JFFS2_SUMMARY_H #define JFFS2_SUMMARY_H #include #include #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_EBH_SIZE(x) (sizeof(struct jffs2_sum_ebh_flash) + (x)) /* 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; /* 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_ebh_flash { jint16_t nodetype; jint32_t totlen; jint32_t offset; uint8_t reserved; uint8_t compat_fset; uint8_t incompat_fset; uint8_t rocompat_fset; jint32_t erase_count; jint16_t dsize; jint32_t data[0]; } __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_ebh_flash eh; }; /* 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_ebh_mem { union jffs2_sum_mem *next; jint16_t nodetype; jint32_t totlen; jint32_t offset; uint8_t reserved; uint8_t compat_fset; uint8_t incompat_fset; uint8_t rocompat_fset; jint32_t erase_count; jint16_t dsize; jint32_t data[0]; } __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_ebh_mem eh; }; /* 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_ebh_mem(struct jffs2_summary *s, struct jffs2_raw_ebh *eh, uint32_t ofs); int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t ofs, 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_ebh_mem(a,b,c) #define jffs2_sum_scan_sumnode(a,b,c,d) (0) #endif /* CONFIG_JFFS2_SUMMARY */ #endif /* JFFS2_SUMMARY_H */