This patch adds support for reading fs information from summary node instead of scanning full eraseblock. Signed-off-by: Ilya Yanok <yanok@emcraft.com>master
Ilya Yanok
16 years ago
committed by
Wolfgang Denk
parent
70741004dc
commit
9b7076229e
@ -0,0 +1,163 @@ |
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/*
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* JFFS2 -- Journalling Flash File System, Version 2. |
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* |
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* Copyright © 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>, |
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* Zoltan Sogor <weth@inf.u-szeged.hu>, |
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* Patrik Kluba <pajko@halom.u-szeged.hu>, |
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* University of Szeged, Hungary |
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* |
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* For licensing information, see the file 'LICENCE' in this directory. |
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* |
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*/ |
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#ifndef JFFS2_SUMMARY_H |
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#define JFFS2_SUMMARY_H |
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#define BLK_STATE_ALLFF 0 |
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#define BLK_STATE_CLEAN 1 |
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#define BLK_STATE_PARTDIRTY 2 |
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#define BLK_STATE_CLEANMARKER 3 |
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#define BLK_STATE_ALLDIRTY 4 |
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#define BLK_STATE_BADBLOCK 5 |
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#define JFFS2_SUMMARY_NOSUM_SIZE 0xffffffff |
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#define JFFS2_SUMMARY_INODE_SIZE (sizeof(struct jffs2_sum_inode_flash)) |
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#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)) |
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#define JFFS2_SUMMARY_XREF_SIZE (sizeof(struct jffs2_sum_xref_flash)) |
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/* Summary structures used on flash */ |
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struct jffs2_sum_unknown_flash |
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{ |
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__u16 nodetype; /* node type */ |
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}; |
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struct jffs2_sum_inode_flash |
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{ |
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__u16 nodetype; /* node type */ |
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__u32 inode; /* inode number */ |
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__u32 version; /* inode version */ |
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__u32 offset; /* offset on jeb */ |
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__u32 totlen; /* record length */ |
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} __attribute__((packed)); |
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struct jffs2_sum_dirent_flash |
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{ |
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__u16 nodetype; /* == JFFS_NODETYPE_DIRENT */ |
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__u32 totlen; /* record length */ |
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__u32 offset; /* offset on jeb */ |
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__u32 pino; /* parent inode */ |
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__u32 version; /* dirent version */ |
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__u32 ino; /* == zero for unlink */ |
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uint8_t nsize; /* dirent name size */ |
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uint8_t type; /* dirent type */ |
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uint8_t name[0]; /* dirent name */ |
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} __attribute__((packed)); |
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struct jffs2_sum_xattr_flash |
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{ |
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__u16 nodetype; /* == JFFS2_NODETYPE_XATR */ |
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__u32 xid; /* xattr identifier */ |
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__u32 version; /* version number */ |
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__u32 offset; /* offset on jeb */ |
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__u32 totlen; /* node length */ |
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} __attribute__((packed)); |
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struct jffs2_sum_xref_flash |
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{ |
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__u16 nodetype; /* == JFFS2_NODETYPE_XREF */ |
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__u32 offset; /* offset on jeb */ |
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} __attribute__((packed)); |
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union jffs2_sum_flash |
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{ |
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struct jffs2_sum_unknown_flash u; |
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struct jffs2_sum_inode_flash i; |
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struct jffs2_sum_dirent_flash d; |
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struct jffs2_sum_xattr_flash x; |
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struct jffs2_sum_xref_flash r; |
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}; |
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/* Summary structures used in the memory */ |
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struct jffs2_sum_unknown_mem |
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{ |
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union jffs2_sum_mem *next; |
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__u16 nodetype; /* node type */ |
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}; |
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struct jffs2_sum_inode_mem |
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{ |
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union jffs2_sum_mem *next; |
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__u16 nodetype; /* node type */ |
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__u32 inode; /* inode number */ |
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__u32 version; /* inode version */ |
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__u32 offset; /* offset on jeb */ |
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__u32 totlen; /* record length */ |
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} __attribute__((packed)); |
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struct jffs2_sum_dirent_mem |
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{ |
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union jffs2_sum_mem *next; |
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__u16 nodetype; /* == JFFS_NODETYPE_DIRENT */ |
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__u32 totlen; /* record length */ |
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__u32 offset; /* ofset on jeb */ |
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__u32 pino; /* parent inode */ |
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__u32 version; /* dirent version */ |
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__u32 ino; /* == zero for unlink */ |
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uint8_t nsize; /* dirent name size */ |
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uint8_t type; /* dirent type */ |
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uint8_t name[0]; /* dirent name */ |
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} __attribute__((packed)); |
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struct jffs2_sum_xattr_mem |
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{ |
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union jffs2_sum_mem *next; |
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__u16 nodetype; |
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__u32 xid; |
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__u32 version; |
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__u32 offset; |
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__u32 totlen; |
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} __attribute__((packed)); |
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struct jffs2_sum_xref_mem |
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{ |
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union jffs2_sum_mem *next; |
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__u16 nodetype; |
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__u32 offset; |
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} __attribute__((packed)); |
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union jffs2_sum_mem |
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{ |
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struct jffs2_sum_unknown_mem u; |
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struct jffs2_sum_inode_mem i; |
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struct jffs2_sum_dirent_mem d; |
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struct jffs2_sum_xattr_mem x; |
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struct jffs2_sum_xref_mem r; |
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}; |
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/* Summary related information stored in superblock */ |
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struct jffs2_summary |
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{ |
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uint32_t sum_size; /* collected summary information for nextblock */ |
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uint32_t sum_num; |
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uint32_t sum_padded; |
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union jffs2_sum_mem *sum_list_head; |
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union jffs2_sum_mem *sum_list_tail; |
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__u32 *sum_buf; /* buffer for writing out summary */ |
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}; |
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/* Summary marker is stored at the end of every sumarized erase block */ |
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struct jffs2_sum_marker |
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{ |
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__u32 offset; /* offset of the summary node in the jeb */ |
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__u32 magic; /* == JFFS2_SUM_MAGIC */ |
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}; |
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#define JFFS2_SUMMARY_FRAME_SIZE (sizeof(struct jffs2_raw_summary) + sizeof(struct jffs2_sum_marker)) |
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#endif /* JFFS2_SUMMARY_H */ |
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