Btrfs: bail out if block group has different mixed flag

commit 49303381f19ab16a371a061b67e783d3f570d56e upstream.

Currently we allow inconsistence about mixed flag

We'd get ENOSPC if block group has mixed flag and btrfs doesn't.
If that happens, we have one space_info with mixed flag and another
space_info only with BTRFS_BLOCK_GROUP_METADATA, and
global_block_rsv.space_info points to the latter one, but all bytes
from block_group contributes to the mixed space_info, thus all the
allocation will fail with ENOSPC.

This adds a check for the above case.

Reported-by: Vegard Nossum <>
Signed-off-by: Liu Bo <>
[ updated message ]
Reviewed-by: David Sterba <>
Signed-off-by: David Sterba <>
Signed-off-by: Greg Kroah-Hartman <>

1 file changed