tree 3a91f6af1396f377a3bced903d605feb9b811b15
parent 9f130263f30233a44a3175db3218dd89af143d64
author Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> 1270889955 +0900
committer Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> 1273458751 +0900

nilfs2: insert checkpoint number in segment summary header

This adds a field to record the latest checkpoint number in the
nilfs_segment_summary structure.  This will help to recover the latest
checkpoint number from logs on disk.  This field is intended for
crucial cases in which super blocks have lost pointer to the latest
log.

Even though this will change the disk format, both backward and
forward compatibility is preserved by a size field prepared in the
segment summary header.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>