[PATCH 2/8] btrfs: disable balance for extent tree v2 for now

Josef Bacik
2021-11-05T20:49:53Z

With global root id's it makes it problematic to do backref lookups for
balance. This isn't hard to deal with, but future changes are going to
make it impossible to lookup backrefs on any cowonly roots, so go ahead
and disable balance for now on extent tree v2 until we can add balance
support back in future patches.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
fs/btrfs/volumes.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 85842eb1f7b1..5e62b97cb265 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -3216,6 +3216,12 @@ int btrfs_relocate_chunk(struct btrfs_fs_info *fs_info, u64 chunk_offset)
u64 length;
int ret;

+ if (btrfs_fs_incompat(fs_info, EXTENT_TREE_V2)) {
+ btrfs_err(fs_info,
+ "relocate: not supported on extent tree v2 yet.");
+ return -EINVAL;
+ }
+
/*
* Prevent races with automatic removal of unused block groups.
* After we relocate and before we remove the chunk with offset
--
2.26.3