fs/jffs2/jffs2_private.h

   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 };
  11
  12 struct b_list {
  13         struct b_node *listTail;
  14         struct b_node *listHead;
  15 #ifdef CFG_JFFS2_SORT_FRAGMENTS
  16         struct b_node *listLast;
  17         int (*listCompare)(struct b_node *new, struct b_node *node);
  18         u32 listLoops;
  19 #endif
  20         u32 listCount;
  21         struct mem_block *listMemBase;
  22 };
  23
  24 struct b_lists {
  25         struct b_list dir;
  26         struct b_list frag;
  27
  28 };
  29
  30 struct b_compr_info {
  31         u32 num_frags;
  32         u32 compr_sum;
  33         u32 decompr_sum;
  34 };
  35
  36 struct b_jffs2_info {
  37         struct b_compr_info compr_info[JFFS2_NUM_COMPR];
  38 };
  39
  40 static inline int
  41 hdr_crc(struct jffs2_unknown_node *node)
  42 {
  43 #if 1
  44         u32 crc = crc32_no_comp(0, (unsigned char *)node, sizeof(struct jffs2_unknown_node) - 4);
  45 #else
  46         /* what's the semantics of this? why is this here? */
  47         u32 crc = crc32_no_comp(~0, (unsigned char *)node, sizeof(struct jffs2_unknown_node) - 4);
  48
  49         crc ^= ~0;
  50 #endif
  51         if (node->hdr_crc != crc) {
  52                 return 0;
  53         } else {
  54                 return 1;
  55         }
  56 }
  57
  58 static inline int
  59 dirent_crc(struct jffs2_raw_dirent *node)
  60 {
  61         if (node->node_crc != crc32_no_comp(0, (unsigned char *)node, sizeof(struct jffs2_raw_dirent) - 8)) {
  62                 return 0;
  63         } else {
  64                 return 1;
  65         }
  66 }
  67
  68 static inline int
  69 dirent_name_crc(struct jffs2_raw_dirent *node)
  70 {
  71         if (node->name_crc != crc32_no_comp(0, (unsigned char *)&(node->name), node->nsize)) {
  72                 return 0;
  73         } else {
  74                 return 1;
  75         }
  76 }
  77
  78 static inline int
  79 inode_crc(struct jffs2_raw_inode *node)
  80 {
  81         if (node->node_crc != crc32_no_comp(0, (unsigned char *)node, sizeof(struct jffs2_raw_inode) - 8)) {
  82                 return 0;
  83         } else {
  84                 return 1;
  85         }
  86 }
  87
  88 static inline int
  89 data_crc(struct jffs2_raw_inode *node)
  90 {
  91         if (node->data_crc != crc32_no_comp(0, (unsigned char *)
  92                                             ((int) &node->node_crc + sizeof (node->node_crc)),
  93                                              node->csize)) {
  94                 return 0;
  95         } else {
  96                 return 1;
  97         }
  98 }
  99
 100 #endif /* jffs2_private.h */