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