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authorGui Hecheng <guihc.fnst@cn.fujitsu.com>2014-11-26 10:43:41 +0800
committerDavid Sterba <dsterba@suse.cz>2014-12-09 14:32:38 +0100
commit662d1dddcad79839f1cbc13cb0be3ec326af2933 (patch)
treebec570ce3392c8ff4467a235128556662e846be7 /inode-item.c
parentf0b1ff4481798c877bdf8869b8f69f36124466a8 (diff)
btrfs-progs: convert: fix unable to rollback case with removed empty block groups
Run fstests: btrfs/012 will fail with message: unable to do rollback It is because the rollback function checks sequentially each piece of space to map to a certain block group. If some piece doesn't, rollback refuses to continue. After kernel commit: commit 47ab2a6c689913db23ccae38349714edf8365e0a Btrfs: remove empty block groups automatically Empty block groups are removed, so there are possible gaps: |--block group 1--| |--block group 2--| ^ | gap So the piece of space of the gap belongs to a removed empty block group, and rollback should detect this case, and feel free to continue. Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
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