source: trunk/packages/xen-3.1/xen-3.1/tools/libaio/harness/cases/8.t @ 34

/* 8.t
- Ditto for the above three tests at the offset maximum (largest
  possible ext2/3 file size.) (8.t)
 */
#include <sys/vfs.h>

#define EXT2_OLD_SUPER_MAGIC    0xEF51
#define EXT2_SUPER_MAGIC        0xEF53

long long get_fs_limit(int fd)
{
        struct statfs s;
        int res;
        long long lim = 0;

        res = fstatfs(fd, &s);          assert(res == 0);

        switch(s.f_type) {
        case EXT2_OLD_SUPER_MAGIC:
        case EXT2_SUPER_MAGIC:
#if 0
        {
                long long tmp;
                tmp = s.f_bsize / 4;
                /* 12 direct + indirect block + dind + tind */
                lim = 12 + tmp + tmp * tmp + tmp * tmp * tmp;
                lim *= s.f_bsize;
                printf("limit(%ld) = %Ld\n", (long)s.f_bsize, lim);
        }
#endif
                switch(s.f_bsize) {
                case 4096: lim = 2199023251456; break;
                default:
                        printf("unknown ext2 blocksize %ld\n", (long)s.f_bsize);
                        exit(3);
                }
                break;
        default:
                printf("unknown filesystem 0x%08lx\n", (long)s.f_type);
                exit(3);
        }
        return lim;
}

#define SET_RLIMIT(x)   do ; while (0)
#define LIMIT           get_fs_limit(rwfd)
#define FILENAME        "testdir.ext2/rwfile"

#include "common-7-8.h"