test_sbzones.c

   1 #include <stdio.h>
   2
   3 #include "fsck.h"
   4 #include "fsck_helper.h"
   5 #include "sofs09.h"
   6
   7 testresult_t test_sbzones (void)
   8 {
   9     testresult_t ret;
  10     int r, s;
  11     int nzones;
  12     SOSuperBlock *sb;
  13
  14     fetch_superblock(&sb);
  15
  16     /* current position inside the disc, in blocks */
  17     uint32_t cpos;
  18
  19     struct zone_s {
  20         /* start position, in blocks, of this zone */
  21         uint32_t start;
  22         /* size, in blocks, of this zone */
  23         uint32_t size;
  24         /* zone name */
  25         char *name;
  26     };
  27     struct zone_s zone[] = {
  28         {sb->fctable_start, sb->fctable_size, "FCT"},
  29         {sb->ciutable_start, sb->ciutable_size, "CIUT"},
  30         {sb->itable_start, sb->itable_size, "IT"},
  31         {sb->dzone_start, sb->dzone_size*BLOCKS_PER_CLUSTER, "DATA"},
  32     };
  33     struct zone_s tempzone;
  34
  35     ret = nice;
  36
  37     /* sort zones by start position (bubble sort) */
  38     nzones = sizeof(zone)/sizeof(struct zone_s);
  39     for (r = 0; r < nzones-1; ++r) {
  40         for (s = r; s < nzones-1-r; ++s) {
  41             if (zone[r].start > zone[r+1].start) {
  42                 tempzone = zone[r];
  43                 zone[r] = zone[r+1];
  44                 zone[r+1] = tempzone;
  45             }
  46         }
  47     }
  48
  49     cpos = 0;
  50
  51     /* advance superblock */
  52     cpos++;
  53
  54     for (r = 0; (r < nzones) && (ret != corrupt); ++r) {
  55         if (cpos > zone[r].start) {
  56             printf("Zones overlap.\n");
  57             ret = corrupt;
  58         } else {
  59             if (cpos != zone[r].start) {
  60                 printf("Zones are not contiguous.\n");
  61                 cpos = zone[r].start;
  62                 ret = weird;
  63             }
  64             cpos += zone[r].size;
  65             if (cpos > sb->ntotal) {
  66                 printf("Zones exceed disc size.\n");
  67                 ret = corrupt;
  68             }
  69         }
  70     }
  71
  72     printf("Detected structure: ZONE_NAME (start,end)\n");
  73     printf("0: SB (0,1) : ");
  74     for (r = 0; r < nzones; ++r) {
  75         printf("%s (%d,%d): ", zone[r].name, zone[r].start,
  76                zone[r].start + zone[r].size);
  77     }
  78     printf("%d\n", sb->ntotal);
  79
  80     return ret;
  81 }
  82