makefs: Calculate indirect block count properly for large files on ffsHEADmain

When building an ffs image containing large file(s), space requirements
were calculated incorrectly yielding a bigger image than necessary.
The reason is that amount of indirect blocks estimation was done wrong:

- single indirect block was treated as it can hold just 12 data blocks
- nested indirect blocks were not taken into account at all

Add support for indirect blocks and fix another tiny bug with
underestimated space requirement for files with size between
(UFS_NDADDR-1)*blksz+fragsz ... (UFS_NDADDR)*blksz requesting N>1
fragments instead of a whole block.

Reviewed by:	kib
Differential Revision: https://reviews.freebsd.org/D52120

0 files changed, 0 insertions, 0 deletions