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- /*
- * 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 */
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