blob: 05c727be60ae68babda76c3b879ee6cd39eedc5b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
OLD
How Directory Committing Works:
Each CDir has:
version - current version of directory
committing_version - which version was sent to stable storage
last_committed_version - last version to be safely stored
Each Inode has:
parent_dir_version - what dir version i was in when i was dirtied. (*)
(*) note that if you change an inode, mark_dirty() again, even if it's already dirty!
How committing works:
A call to commit_dir(dir, context) will ensure tha the _current_ version is stored safely on disk before the context is finished.
When a commit completes, inodes in the directory are checked. If they are dirty and belonged to the _committed_ (or earlier) version, then they are marked clean. If they belong to a newer version, then they are _still dirty_.
|
