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