/* * JFFS2 -- Journalling Flash File System, Version 2. * * Copyright © 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 #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 { __u16 nodetype; /* node type */ }; struct jffs2_sum_inode_flash { __u16 nodetype; /* node type */ __u32 inode; /* inode number */ __u32 version; /* inode version */ __u32 offset; /* offset on jeb */ __u32 totlen; /* record length */ } __attribute__((packed)); struct jffs2_sum_dirent_flash { __u16 nodetype; /* == JFFS_NODETYPE_DIRENT */ __u32 totlen; /* record length */ __u32 offset; /* offset on jeb */ __u32 pino; /* parent inode */ __u32 version; /* dirent version */ __u32 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 { __u16 nodetype; /* == JFFS2_NODETYPE_XATR */ __u32 xid; /* xattr identifier */ __u32 version; /* version number */ __u32 offset; /* offset on jeb */ __u32 totlen; /* node length */ } __attribute__((packed)); struct jffs2_sum_xref_flash { __u16 nodetype; /* == JFFS2_NODETYPE_XREF */ __u32 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; __u16 nodetype; /* node type */ }; struct jffs2_sum_inode_mem { union jffs2_sum_mem *next; __u16 nodetype; /* node type */ __u32 inode; /* inode number */ __u32 version; /* inode version */ __u32 offset; /* offset on jeb */ __u32 totlen; /* record length */ } __attribute__((packed)); struct jffs2_sum_dirent_mem { union jffs2_sum_mem *next; __u16 nodetype; /* == JFFS_NODETYPE_DIRENT */ __u32 totlen; /* record length */ __u32 offset; /* ofset on jeb */ __u32 pino; /* parent inode */ __u32 version; /* dirent version */ __u32 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; __u16 nodetype; __u32 xid; __u32 version; __u32 offset; __u32 totlen; } __attribute__((packed)); struct jffs2_sum_xref_mem { union jffs2_sum_mem *next; __u16 nodetype; __u32 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; __u32 *sum_buf; /* buffer for writing out summary */ }; /* Summary marker is stored at the end of every sumarized erase block */ struct jffs2_sum_marker { __u32 offset; /* offset of the summary node in the jeb */ __u32 magic; /* == JFFS2_SUM_MAGIC */ }; #define JFFS2_SUMMARY_FRAME_SIZE (sizeof(struct jffs2_raw_summary) + sizeof(struct jffs2_sum_marker)) #endif /* JFFS2_SUMMARY_H */