| commit | bd989ba359f2acb8bc5f5490e19010fc0a6f8356 | [log] [tgz] |
|---|---|---|
| author | Jan Schmidt <list.btrfs@jan-o-sch.net> | Wed May 16 17:18:50 2012 +0200 |
| committer | Jan Schmidt <list.btrfs@jan-o-sch.net> | Wed May 30 15:17:01 2012 +0200 |
| tree | 3689629e226678802bfe9b8a91ae560ef50a93f0 | |
| parent | f29021b29a85701c08afadfd51d87163fb078059 [diff] |
Btrfs: add tree modification log functions The tree mod log will log modifications made fs-tree nodes. Most modifications are done by autobalance of the tree. Such changes are recorded as long as a block entry exists. When released, the log is cleaned. With the tree modification log, it's possible to reconstruct a consistent old state of the tree. This is required to do backref walking on a busy file system. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>