LXR uboot/fs/jffs2/jffs2

   1#ifndef jffs2_private_h
   2#define jffs2_private_h
   3
   4#include <jffs2/jffs2.h>
   5
   6
   7struct 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
  18struct 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
  30struct b_lists {
  31        struct b_list dir;
  32        struct b_list frag;
  33        void *readbuf;
  34};
  35
  36struct b_compr_info {
  37        u32 num_frags;
  38        u32 compr_sum;
  39        u32 decompr_sum;
  40};
  41
  42struct b_jffs2_info {
  43        struct b_compr_info compr_info[JFFS2_NUM_COMPR];
  44};
  45
  46static inline int
  47hdr_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
  64static inline int
  65dirent_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
  74static inline int
  75dirent_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
  84static inline int
  85inode_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
  94static inline int
  95data_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. */
 108int sort_list(struct b_list *list);
 109#endif
 110#endif /* jffs2_private.h */
 111