Btrfs: add owner and type fields to the extents aand block headers

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 42 insertions, 3 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 681b23933d9b..78248d577290 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -62,6 +62,7 @@ struct btrfs_header {
         u8 fsid[16]; /* FS specific uuid */
         __le64 blocknr; /* which block this node is supposed to live in */
         __le64 generation;
+        __le64 owner;
         __le16 nritems;
         __le16 flags;
         u8 level;
@@ -151,12 +152,17 @@ struct btrfs_path {
         int slots[BTRFS_MAX_LEVEL];
 };
 
+/* values for the type field in btrfs_extent_item */
+#define BTRFS_EXTENT_TREE 1
+#define BTRFS_EXTENT_FILE 2
 /*
  * items in the extent btree are used to record the objectid of the
  * owner of the block and the number of references
  */
 struct btrfs_extent_item {
         __le32 refs;
+        __le64 owner;
+        u8 type;
 } __attribute__ ((__packed__));
 
 struct btrfs_inode_timespec {
@@ -473,11 +479,32 @@ static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val)
         ei->refs = cpu_to_le32(val);
 }
 
+static inline u64 btrfs_extent_owner(struct btrfs_extent_item *ei)
+{
+        return le64_to_cpu(ei->owner);
+}
+
+static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val)
+{
+        ei->owner = cpu_to_le64(val);
+}
+
+static inline u8 btrfs_extent_type(struct btrfs_extent_item *ei)
+{
+        return ei->type;
+}
+
+static inline void btrfs_set_extent_type(struct btrfs_extent_item *ei, u8 val)
+{
+        ei->type = val;
+}
+
 static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr)
 {
         return le64_to_cpu(n->ptrs[nr].blockptr);
 }
 
+
 static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr,
                                            u64 val)
 {
@@ -636,6 +663,17 @@ static inline void btrfs_set_header_generation(struct btrfs_header *h,
         h->generation = cpu_to_le64(val);
 }
 
+static inline u64 btrfs_header_owner(struct btrfs_header *h)
+{
+        return le64_to_cpu(h->owner);
+}
+
+static inline void btrfs_set_header_owner(struct btrfs_header *h,
+                                               u64 val)
+{
+        h->owner = cpu_to_le64(val);
+}
+
 static inline u16 btrfs_header_nritems(struct btrfs_header *h)
 {
         return le16_to_cpu(h->nritems);
@@ -996,9 +1034,10 @@ int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
                        struct btrfs_root *root);
 struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
                                             struct btrfs_root *root);
-int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root
-                        *root, u64 num_blocks, u64 search_start, u64
-                        search_end, struct btrfs_key *ins);
+int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
+                       struct btrfs_root *root, u64 owner,
+                       u8 type, u64 num_blocks, u64 search_start,
+                       u64 search_end, struct btrfs_key *ins);
 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
                   struct buffer_head *buf);
 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root