[PATCH RFC 4/7] btrfs-progs: dump-tree/dump-super: Introduce support for skinny bg tree

[Qu Wenruo <wqu@suse.com>]

Just a new tree called BLOCK_GROUP_TREE.

The new type (SKINNY_BLOCK_GROUP_ITEM) doesn't has any item, thus no
need to add any extra output.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 cmds/inspect-dump-super.c | 3 ++-
 cmds/inspect-dump-tree.c  | 5 +++++
 print-tree.c              | 4 ++++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/cmds/inspect-dump-super.c b/cmds/inspect-dump-super.c
index fc06488dde32..02afa96054cc 100644
--- a/cmds/inspect-dump-super.c
+++ b/cmds/inspect-dump-super.c
@@ -227,7 +227,8 @@ static struct readable_flag_entry incompat_flags_array[] = {
 	DEF_INCOMPAT_FLAG_ENTRY(RAID56),
 	DEF_INCOMPAT_FLAG_ENTRY(SKINNY_METADATA),
 	DEF_INCOMPAT_FLAG_ENTRY(NO_HOLES),
-	DEF_INCOMPAT_FLAG_ENTRY(METADATA_UUID)
+	DEF_INCOMPAT_FLAG_ENTRY(METADATA_UUID),
+	DEF_INCOMPAT_FLAG_ENTRY(SKINNY_BG_TREE)
 };
 static const int incompat_flags_num = sizeof(incompat_flags_array) /
 				      sizeof(struct readable_flag_entry);
diff --git a/cmds/inspect-dump-tree.c b/cmds/inspect-dump-tree.c
index e5efe2470111..002fd92fdc84 100644
--- a/cmds/inspect-dump-tree.c
+++ b/cmds/inspect-dump-tree.c
@@ -152,6 +152,7 @@ static u64 treeid_from_string(const char *str, const char **end)
 		{ "QUOTA", BTRFS_QUOTA_TREE_OBJECTID },
 		{ "UUID", BTRFS_UUID_TREE_OBJECTID },
 		{ "FREE_SPACE", BTRFS_FREE_SPACE_TREE_OBJECTID },
+		{ "BG", BTRFS_BLOCK_GROUP_TREE_OBJECTID},
 		{ "TREE_LOG_FIXUP", BTRFS_TREE_LOG_FIXUP_OBJECTID },
 		{ "TREE_LOG", BTRFS_TREE_LOG_OBJECTID },
 		{ "TREE_RELOC", BTRFS_TREE_RELOC_OBJECTID },
@@ -663,6 +664,10 @@ again:
 				if (!skip)
 					printf("free space");
 				break;
+			case BTRFS_BLOCK_GROUP_TREE_OBJECTID:
+				if (!skip)
+					printf("block group");
+				break;
 			case BTRFS_MULTIPLE_OBJECTIDS:
 				if (!skip) {
 					printf("multiple");
diff --git a/print-tree.c b/print-tree.c
index f70ce6844a7e..87c1bf2f40f6 100644
--- a/print-tree.c
+++ b/print-tree.c
@@ -656,6 +656,7 @@ void print_key_type(FILE *stream, u64 objectid, u8 type)
 		[BTRFS_EXTENT_CSUM_KEY]		= "EXTENT_CSUM",
 		[BTRFS_EXTENT_DATA_KEY]		= "EXTENT_DATA",
 		[BTRFS_BLOCK_GROUP_ITEM_KEY]	= "BLOCK_GROUP_ITEM",
+		[BTRFS_SKINNY_BLOCK_GROUP_ITEM_KEY] = "SKINNY_BLOCK_GROUP_ITEM",
 		[BTRFS_FREE_SPACE_INFO_KEY]	= "FREE_SPACE_INFO",
 		[BTRFS_FREE_SPACE_EXTENT_KEY]	= "FREE_SPACE_EXTENT",
 		[BTRFS_FREE_SPACE_BITMAP_KEY]	= "FREE_SPACE_BITMAP",
@@ -775,6 +776,9 @@ void print_objectid(FILE *stream, u64 objectid, u8 type)
 	case BTRFS_FREE_SPACE_TREE_OBJECTID:
 		fprintf(stream, "FREE_SPACE_TREE");
 		break;
+	case BTRFS_BLOCK_GROUP_TREE_OBJECTID:
+		fprintf(stream, "BLOCK_GROUP_TREE");
+		break;
 	case BTRFS_MULTIPLE_OBJECTIDS:
 		fprintf(stream, "MULTIPLE");
 		break;
-- 
2.23.0