[PATCH] btrfs: add missing BTRFS_SUPER_FLAG define

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btrfs-progs uses additional two super flag bits. So just define
that so that we know its been used.

Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
---
The btrfs-progs commits (very old) introduced them,

 commit 7cc792872a133cabc3467e6ccaf5a2c8ea9e5218
    btrfs-progs: Add CHANGING_FSID super flag

 commit 797a937e5dd8db0092add633a80f3cd698e182df
    Btrfs-progs: Introduce metadump_v2

Appears that we need bit of support from the kernel side like
failing to mount if CHANGING_FSID is set. And device mounted
with metadump_v2 flag is kind of broken on the kernel side
as of now, this patch does not fix those.

 include/uapi/linux/btrfs_tree.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h
index 6d6e5da51527..aff1356c2bb8 100644
--- a/include/uapi/linux/btrfs_tree.h
+++ b/include/uapi/linux/btrfs_tree.h
@@ -456,6 +456,8 @@ struct btrfs_free_space_header {
 
 #define BTRFS_SUPER_FLAG_SEEDING	(1ULL << 32)
 #define BTRFS_SUPER_FLAG_METADUMP	(1ULL << 33)
+#define BTRFS_SUPER_FLAG_METADUMP_V2	(1ULL << 34)
+#define BTRFS_SUPER_FLAG_CHANGING_FSID	(1ULL << 35)
 
 
 /*
-- 
2.15.0

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