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57180
2009 Dec 17
0
[PATCH] Btrfs: set a incompat flag when setting default subvol
...bvolume, you can''t go back to older kernels. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
---
fs/btrfs/ctree.h | 4 +++-
fs/btrfs/ioctl.c | 8 ++++++++
2 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 917211b..8c57180 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -370,11 +370,13 @@ struct btrfs_super_block {
* ones specified below then we will fail to mount
*/
#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
+#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (2ULL << 0)
#define...