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    Btrfs: add tree modification log functions · bd989ba3
    Jan Schmidt 提交于
    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: NJan Schmidt <list.btrfs@jan-o-sch.net>
    bd989ba3
ctree.h 98.7 KB