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https://github.com/kdave/btrfs-progs
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c5a21a7814
The extent tree v2 (thankfully not yet fully materialized) needs a new root for storing all block group items. My initial proposal years ago just added a new tree rootid, and load it from tree root, just like what we did for quota/free space tree/uuid/extent roots. But the extent tree v2 patches introduced a completely new (and to me, wasteful) way to store block group tree root into super block. Currently there are only 3 trees stored in super blocks, and they all have their valid reasons: - Chunk root Needed for bootstrap. - Tree root Really the entrance of all trees. - Log root This is special as log root has to be updated out of existing transaction mechanism. There is not even any reason to put block group root into super blocks, the block group tree is updated at the same timing as old extent tree, no need for extra bootstrap/out-of-transaction update. So just move block group root from super block into tree root. Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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| .. | ||
| common.c | ||
| common.h | ||
| main.c | ||
| Makefile | ||
| rootdir.c | ||
| rootdir.h | ||