Btrfs: bugfix: ignore the wrong key for indirect tree block backrefs

Browse source

The key we store with a tree block backref is only a hint. It is set when
the ref is created and can remain correct for a long time. As the tree is
rebalanced, however, eventually the key no longer points to the correct
destination.

With this patch, we change find_parent_nodes to no longer add keys unless it
knows for sure they're correct (e.g. because they're for an extent data
backref). Then when we later encounter a backref ref with no parent and no
key set, we grab the block and take the first key from the block itself.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>

...

This commit is contained in:

Jan Schmidt 2012-05-15 17:55:51 +02:00

parent dadcaf78b5

commit d5c88b735f

1 changed files with 135 additions and 50 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

185

fs/btrfs/backref.c

View file