| commit | bd989ba359f2acb8bc5f5490e19010fc0a6f8356 | |
| author | Jan Schmidt <list.btrfs@jan-o-sch.net> | |
| Wed, 16 May 2012 15:18:50 +0000 (16 17:18 +0200) | ||
| committer | Jan Schmidt <list.btrfs@jan-o-sch.net> | |
| Wed, 30 May 2012 13:17:01 +0000 (30 15:17 +0200) | ||
| tree | 3689629e226678802bfe9b8a91ae560ef50a93f0 | treesnapshot (tar.gz zip) |
| parent | f29021b29a85701c08afadfd51d87163fb078059 | commitdiff |
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>
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>
| fs/btrfs/ctree.c | diffblobblamehistory | |
| fs/btrfs/ctree.h | diffblobblamehistory |