/**
* Reads the specified area from disk and loads its contents into the RAM
* representation.
*
* @param area_idx The index of the area to read.
*
* @return 0 on success; nonzero on failure.
*/
static int
nffs_restore_area_contents(int area_idx)
{
struct nffs_disk_object disk_object;
struct nffs_area *area;
int rc;
area = nffs_areas + area_idx;
area->na_cur = sizeof (struct nffs_disk_area);
while (1) {
rc = nffs_restore_disk_object(area_idx, area->na_cur, &disk_object);
switch (rc) {
case 0:
/* Valid object; restore it into the RAM representation. */
nffs_restore_object(&disk_object);
area->na_cur += nffs_restore_disk_object_size(&disk_object);
break;
case FS_ECORRUPT:
/* Invalid object; keep scanning for a valid magic number. */
area->na_cur++;
break;
case FS_EEMPTY:
case FS_ERANGE:
/* End of disk encountered; area fully restored. */
return 0;
default:
return rc;
}
}
}
/**
* Reads the specified area from disk and loads its contents into the RAM
* representation.
*
* @param area_idx The index of the area to read.
*
* @return 0 on success; nonzero on failure.
*/
static int
nffs_restore_area_contents(int area_idx)
{
struct nffs_disk_object disk_object;
struct nffs_area *area;
int rc;
area = nffs_areas + area_idx;
area->na_cur = sizeof (struct nffs_disk_area);
while (1) {
rc = nffs_restore_disk_object(area_idx, area->na_cur, &disk_object);
switch (rc) {
case 0:
/* Valid object; restore it into the RAM representation. */
rc = nffs_restore_object(&disk_object);
/*
* If the restore fails the CRC check, the object length field
* can't be trusted so just start looking for the next valid
* object in the flash area.
* XXX Deal with file system corruption
*/
if (rc == FS_ECORRUPT) {
area->na_cur++;
} else {
STATS_INC(nffs_stats, nffs_object_count); /* restored objects */
area->na_cur += nffs_restore_disk_object_size(&disk_object);
}
break;
case FS_ECORRUPT:
/*
* Invalid object; keep scanning for a valid object ID and CRC
* Can nffs_restore_disk_object return FS_ECORRUPT? XXX
*/
area->na_cur++;
break;
case FS_EEMPTY:
case FS_EOFFSET:
/* End of disk encountered; area fully restored. */
return 0;
default:
return rc;
}
}
}