1 #ifndef jffs2_private_h
2 #define jffs2_private_h
3
4 #include <jffs2/jffs2.h>
5
6
7 struct b_node {
8 u32 offset;
9 struct b_node *next;
10 enum { CRC_UNKNOWN = 0, CRC_OK, CRC_BAD } datacrc;
11 u32 version;
12 union {
13 u32 ino; /* for inodes */
14 u32 pino; /* for dirents */
15 };
16 };
17
18 struct b_list {
19 struct b_node *listTail;
20 struct b_node *listHead;
21 #ifdef CONFIG_SYS_JFFS2_SORT_FRAGMENTS
22 struct b_node *listLast;
23 int (*listCompare)(struct b_node *new, struct b_node *node);
24 u32 listLoops;
25 #endif
26 u32 listCount;
27 struct mem_block *listMemBase;
28 };
29
30 struct b_lists {
31 struct b_list dir;
32 struct b_list frag;
33 void *readbuf;
34 };
35
36 struct b_compr_info {
37 u32 num_frags;
38 u32 compr_sum;
39 u32 decompr_sum;
40 };
41
42 struct b_jffs2_info {
43 struct b_compr_info compr_info[JFFS2_NUM_COMPR];
44 };
45
46 static inline int
hdr_crc(struct jffs2_unknown_node * node)47 hdr_crc(struct jffs2_unknown_node *node)
48 {
49 #if 1
50 u32 crc = crc32_no_comp(0, (unsigned char *)node, sizeof(struct jffs2_unknown_node) - 4);
51 #else
52 /* what's the semantics of this? why is this here? */
53 u32 crc = crc32_no_comp(~0, (unsigned char *)node, sizeof(struct jffs2_unknown_node) - 4);
54
55 crc ^= ~0;
56 #endif
57 if (node->hdr_crc != crc) {
58 return 0;
59 } else {
60 return 1;
61 }
62 }
63
64 static inline int
dirent_crc(struct jffs2_raw_dirent * node)65 dirent_crc(struct jffs2_raw_dirent *node)
66 {
67 if (node->node_crc != crc32_no_comp(0, (unsigned char *)node, sizeof(struct jffs2_raw_dirent) - 8)) {
68 return 0;
69 } else {
70 return 1;
71 }
72 }
73
74 static inline int
dirent_name_crc(struct jffs2_raw_dirent * node)75 dirent_name_crc(struct jffs2_raw_dirent *node)
76 {
77 if (node->name_crc != crc32_no_comp(0, (unsigned char *)&(node->name), node->nsize)) {
78 return 0;
79 } else {
80 return 1;
81 }
82 }
83
84 static inline int
inode_crc(struct jffs2_raw_inode * node)85 inode_crc(struct jffs2_raw_inode *node)
86 {
87 if (node->node_crc != crc32_no_comp(0, (unsigned char *)node, sizeof(struct jffs2_raw_inode) - 8)) {
88 return 0;
89 } else {
90 return 1;
91 }
92 }
93
94 static inline int
data_crc(struct jffs2_raw_inode * node)95 data_crc(struct jffs2_raw_inode *node)
96 {
97 if (node->data_crc != crc32_no_comp(0, (unsigned char *)
98 ((int) &node->node_crc + sizeof (node->node_crc)),
99 node->csize)) {
100 return 0;
101 } else {
102 return 1;
103 }
104 }
105
106 #if defined(CONFIG_SYS_JFFS2_SORT_FRAGMENTS)
107 /* External merge sort. */
108 int sort_list(struct b_list *list);
109 #endif
110 #endif /* jffs2_private.h */
111