1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * JFFS2 -- Journalling Flash File System, Version 2. 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Copyright © 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>, 5*4882a593Smuzhiyun * Zoltan Sogor <weth@inf.u-szeged.hu>, 6*4882a593Smuzhiyun * Patrik Kluba <pajko@halom.u-szeged.hu>, 7*4882a593Smuzhiyun * University of Szeged, Hungary 8*4882a593Smuzhiyun * 9*4882a593Smuzhiyun * For licensing information, see the file 'LICENCE' in this directory. 10*4882a593Smuzhiyun * 11*4882a593Smuzhiyun */ 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #ifndef JFFS2_SUMMARY_H 14*4882a593Smuzhiyun #define JFFS2_SUMMARY_H 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #define BLK_STATE_ALLFF 0 17*4882a593Smuzhiyun #define BLK_STATE_CLEAN 1 18*4882a593Smuzhiyun #define BLK_STATE_PARTDIRTY 2 19*4882a593Smuzhiyun #define BLK_STATE_CLEANMARKER 3 20*4882a593Smuzhiyun #define BLK_STATE_ALLDIRTY 4 21*4882a593Smuzhiyun #define BLK_STATE_BADBLOCK 5 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun #define JFFS2_SUMMARY_NOSUM_SIZE 0xffffffff 24*4882a593Smuzhiyun #define JFFS2_SUMMARY_INODE_SIZE (sizeof(struct jffs2_sum_inode_flash)) 25*4882a593Smuzhiyun #define JFFS2_SUMMARY_DIRENT_SIZE(x) (sizeof(struct jffs2_sum_dirent_flash) + (x)) 26*4882a593Smuzhiyun #define JFFS2_SUMMARY_XATTR_SIZE (sizeof(struct jffs2_sum_xattr_flash)) 27*4882a593Smuzhiyun #define JFFS2_SUMMARY_XREF_SIZE (sizeof(struct jffs2_sum_xref_flash)) 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun /* Summary structures used on flash */ 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun struct jffs2_sum_unknown_flash 32*4882a593Smuzhiyun { 33*4882a593Smuzhiyun __u16 nodetype; /* node type */ 34*4882a593Smuzhiyun }; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun struct jffs2_sum_inode_flash 37*4882a593Smuzhiyun { 38*4882a593Smuzhiyun __u16 nodetype; /* node type */ 39*4882a593Smuzhiyun __u32 inode; /* inode number */ 40*4882a593Smuzhiyun __u32 version; /* inode version */ 41*4882a593Smuzhiyun __u32 offset; /* offset on jeb */ 42*4882a593Smuzhiyun __u32 totlen; /* record length */ 43*4882a593Smuzhiyun } __attribute__((packed)); 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun struct jffs2_sum_dirent_flash 46*4882a593Smuzhiyun { 47*4882a593Smuzhiyun __u16 nodetype; /* == JFFS_NODETYPE_DIRENT */ 48*4882a593Smuzhiyun __u32 totlen; /* record length */ 49*4882a593Smuzhiyun __u32 offset; /* offset on jeb */ 50*4882a593Smuzhiyun __u32 pino; /* parent inode */ 51*4882a593Smuzhiyun __u32 version; /* dirent version */ 52*4882a593Smuzhiyun __u32 ino; /* == zero for unlink */ 53*4882a593Smuzhiyun uint8_t nsize; /* dirent name size */ 54*4882a593Smuzhiyun uint8_t type; /* dirent type */ 55*4882a593Smuzhiyun uint8_t name[0]; /* dirent name */ 56*4882a593Smuzhiyun } __attribute__((packed)); 57*4882a593Smuzhiyun 58*4882a593Smuzhiyun struct jffs2_sum_xattr_flash 59*4882a593Smuzhiyun { 60*4882a593Smuzhiyun __u16 nodetype; /* == JFFS2_NODETYPE_XATR */ 61*4882a593Smuzhiyun __u32 xid; /* xattr identifier */ 62*4882a593Smuzhiyun __u32 version; /* version number */ 63*4882a593Smuzhiyun __u32 offset; /* offset on jeb */ 64*4882a593Smuzhiyun __u32 totlen; /* node length */ 65*4882a593Smuzhiyun } __attribute__((packed)); 66*4882a593Smuzhiyun 67*4882a593Smuzhiyun struct jffs2_sum_xref_flash 68*4882a593Smuzhiyun { 69*4882a593Smuzhiyun __u16 nodetype; /* == JFFS2_NODETYPE_XREF */ 70*4882a593Smuzhiyun __u32 offset; /* offset on jeb */ 71*4882a593Smuzhiyun } __attribute__((packed)); 72*4882a593Smuzhiyun 73*4882a593Smuzhiyun union jffs2_sum_flash 74*4882a593Smuzhiyun { 75*4882a593Smuzhiyun struct jffs2_sum_unknown_flash u; 76*4882a593Smuzhiyun struct jffs2_sum_inode_flash i; 77*4882a593Smuzhiyun struct jffs2_sum_dirent_flash d; 78*4882a593Smuzhiyun struct jffs2_sum_xattr_flash x; 79*4882a593Smuzhiyun struct jffs2_sum_xref_flash r; 80*4882a593Smuzhiyun }; 81*4882a593Smuzhiyun 82*4882a593Smuzhiyun /* Summary structures used in the memory */ 83*4882a593Smuzhiyun 84*4882a593Smuzhiyun struct jffs2_sum_unknown_mem 85*4882a593Smuzhiyun { 86*4882a593Smuzhiyun union jffs2_sum_mem *next; 87*4882a593Smuzhiyun __u16 nodetype; /* node type */ 88*4882a593Smuzhiyun }; 89*4882a593Smuzhiyun 90*4882a593Smuzhiyun struct jffs2_sum_inode_mem 91*4882a593Smuzhiyun { 92*4882a593Smuzhiyun union jffs2_sum_mem *next; 93*4882a593Smuzhiyun __u16 nodetype; /* node type */ 94*4882a593Smuzhiyun __u32 inode; /* inode number */ 95*4882a593Smuzhiyun __u32 version; /* inode version */ 96*4882a593Smuzhiyun __u32 offset; /* offset on jeb */ 97*4882a593Smuzhiyun __u32 totlen; /* record length */ 98*4882a593Smuzhiyun } __attribute__((packed)); 99*4882a593Smuzhiyun 100*4882a593Smuzhiyun struct jffs2_sum_dirent_mem 101*4882a593Smuzhiyun { 102*4882a593Smuzhiyun union jffs2_sum_mem *next; 103*4882a593Smuzhiyun __u16 nodetype; /* == JFFS_NODETYPE_DIRENT */ 104*4882a593Smuzhiyun __u32 totlen; /* record length */ 105*4882a593Smuzhiyun __u32 offset; /* ofset on jeb */ 106*4882a593Smuzhiyun __u32 pino; /* parent inode */ 107*4882a593Smuzhiyun __u32 version; /* dirent version */ 108*4882a593Smuzhiyun __u32 ino; /* == zero for unlink */ 109*4882a593Smuzhiyun uint8_t nsize; /* dirent name size */ 110*4882a593Smuzhiyun uint8_t type; /* dirent type */ 111*4882a593Smuzhiyun uint8_t name[0]; /* dirent name */ 112*4882a593Smuzhiyun } __attribute__((packed)); 113*4882a593Smuzhiyun 114*4882a593Smuzhiyun struct jffs2_sum_xattr_mem 115*4882a593Smuzhiyun { 116*4882a593Smuzhiyun union jffs2_sum_mem *next; 117*4882a593Smuzhiyun __u16 nodetype; 118*4882a593Smuzhiyun __u32 xid; 119*4882a593Smuzhiyun __u32 version; 120*4882a593Smuzhiyun __u32 offset; 121*4882a593Smuzhiyun __u32 totlen; 122*4882a593Smuzhiyun } __attribute__((packed)); 123*4882a593Smuzhiyun 124*4882a593Smuzhiyun struct jffs2_sum_xref_mem 125*4882a593Smuzhiyun { 126*4882a593Smuzhiyun union jffs2_sum_mem *next; 127*4882a593Smuzhiyun __u16 nodetype; 128*4882a593Smuzhiyun __u32 offset; 129*4882a593Smuzhiyun } __attribute__((packed)); 130*4882a593Smuzhiyun 131*4882a593Smuzhiyun union jffs2_sum_mem 132*4882a593Smuzhiyun { 133*4882a593Smuzhiyun struct jffs2_sum_unknown_mem u; 134*4882a593Smuzhiyun struct jffs2_sum_inode_mem i; 135*4882a593Smuzhiyun struct jffs2_sum_dirent_mem d; 136*4882a593Smuzhiyun struct jffs2_sum_xattr_mem x; 137*4882a593Smuzhiyun struct jffs2_sum_xref_mem r; 138*4882a593Smuzhiyun }; 139*4882a593Smuzhiyun 140*4882a593Smuzhiyun /* Summary related information stored in superblock */ 141*4882a593Smuzhiyun 142*4882a593Smuzhiyun struct jffs2_summary 143*4882a593Smuzhiyun { 144*4882a593Smuzhiyun uint32_t sum_size; /* collected summary information for nextblock */ 145*4882a593Smuzhiyun uint32_t sum_num; 146*4882a593Smuzhiyun uint32_t sum_padded; 147*4882a593Smuzhiyun union jffs2_sum_mem *sum_list_head; 148*4882a593Smuzhiyun union jffs2_sum_mem *sum_list_tail; 149*4882a593Smuzhiyun 150*4882a593Smuzhiyun __u32 *sum_buf; /* buffer for writing out summary */ 151*4882a593Smuzhiyun }; 152*4882a593Smuzhiyun 153*4882a593Smuzhiyun /* Summary marker is stored at the end of every sumarized erase block */ 154*4882a593Smuzhiyun 155*4882a593Smuzhiyun struct jffs2_sum_marker 156*4882a593Smuzhiyun { 157*4882a593Smuzhiyun __u32 offset; /* offset of the summary node in the jeb */ 158*4882a593Smuzhiyun __u32 magic; /* == JFFS2_SUM_MAGIC */ 159*4882a593Smuzhiyun }; 160*4882a593Smuzhiyun 161*4882a593Smuzhiyun #define JFFS2_SUMMARY_FRAME_SIZE (sizeof(struct jffs2_raw_summary) + sizeof(struct jffs2_sum_marker)) 162*4882a593Smuzhiyun 163*4882a593Smuzhiyun #endif /* JFFS2_SUMMARY_H */ 164