EXT2_DESCS_PER_BLOCK
return ((fs->e2fs_gcount + EXT2_DESCS_PER_BLOCK(fs) - 1) /
EXT2_DESCS_PER_BLOCK(fs));
metagroup = cg / EXT2_DESCS_PER_BLOCK(fs);
first = metagroup * EXT2_DESCS_PER_BLOCK(fs);
last = first + EXT2_DESCS_PER_BLOCK(fs) - 1;
metagroup = cg / EXT2_DESCS_PER_BLOCK(fs);
EXT2_DESCS_PER_BLOCK(fs)) {
if (fs->e2fs_gcount > ((uint64_t)1 << 32) - EXT2_DESCS_PER_BLOCK(fs)) {