This is what i have now . But still i am not able to map the magic number
#include <stdio.h>
main()
{
unsigned long long upper_limit;
int meta_blocks;
int bits = 12;
/* total blocks in 512 bytes */
upper_limit = (1LL << 32) -1;
/* total blocks in file system block size */
upper_limit >>= (bits - 9);
/* indirect blocks */
meta_blocks = 1;
/* double indirect blocks */
meta_blocks += 1 + (1LL << (bits-2));
/* tripple indirect blocks */
meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2)));
upper_limit -= meta_blocks;
upper_limit <<= bits;
printf("expected %llx %llx\n",0x1ff7fffd000LL, upper_limit);
}
expected 1ff7fffd000 1feff7fc000
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