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author | Yan Zheng <zheng.yan@oracle.com> | 2009-06-27 21:07:35 -0400 |
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committer | Chris Mason <chris.mason@oracle.com> | 2009-07-02 13:41:17 -0400 |
commit | 2c47e605a91dde6b0514f689645e7ab336c8592a (patch) | |
tree | d541e61440f06f37d17e2d14cbaa78fc0cd41ff2 /virt | |
parent | a970b0a16cc416a509d5ae8b1d70978664e6f4fe (diff) |
Btrfs: update backrefs while dropping snapshot
The new backref format has restriction on type of backref item. If a tree
block isn't referenced by its owner tree, full backrefs must be used for the
pointers in it. When a tree block loses its owner tree's reference, backrefs
for the pointers in it should be updated to full backrefs. Current
btrfs_drop_snapshot misses the code that updates backrefs, so it's unsafe for
general use.
This patch adds backrefs update code to btrfs_drop_snapshot. It isn't a
problem in the restricted form btrfs_drop_snapshot is used today, but for
general snapshot deletion this update is required.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'virt')
0 files changed, 0 insertions, 0 deletions