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fs/jffs2/summary.h
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/* * JFFS2 -- Journalling Flash File System, Version 2. * |
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* 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 |
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* * For licensing information, see the file 'LICENCE' in this directory. * |
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*/ #ifndef JFFS2_SUMMARY_H #define JFFS2_SUMMARY_H #include <linux/uio.h> #include <linux/jffs2.h> |
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#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)) |
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#define JFFS2_SUMMARY_XATTR_SIZE (sizeof(struct jffs2_sum_xattr_flash)) #define JFFS2_SUMMARY_XREF_SIZE (sizeof(struct jffs2_sum_xref_flash)) |
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/* 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)); |
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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)); |
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union jffs2_sum_flash { struct jffs2_sum_unknown_flash u; struct jffs2_sum_inode_flash i; struct jffs2_sum_dirent_flash d; |
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struct jffs2_sum_xattr_flash x; struct jffs2_sum_xref_flash r; |
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}; /* 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)); |
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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)); |
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union jffs2_sum_mem { struct jffs2_sum_unknown_mem u; struct jffs2_sum_inode_mem i; struct jffs2_sum_dirent_mem d; |
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struct jffs2_sum_xattr_mem x; struct jffs2_sum_xref_mem r; |
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}; /* 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 */ }; |
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#define JFFS2_SUMMARY_FRAME_SIZE (sizeof(struct jffs2_raw_summary) + sizeof(struct jffs2_sum_marker)) |
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#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); |
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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); |
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int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, |
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struct jffs2_raw_summary *summary, uint32_t sumlen, uint32_t *pseudo_random); |
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#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) |
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#define jffs2_sum_add_xattr_mem(a,b,c) #define jffs2_sum_add_xref_mem(a,b,c) |
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#define jffs2_sum_scan_sumnode(a,b,c,d,e) (0) |
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#endif /* CONFIG_JFFS2_SUMMARY */ #endif /* JFFS2_SUMMARY_H */ |