From eb3bd5da6698fd2d24cf7f04e065e0c521cbc354 Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@oracle.com>
Date: Thu, 19 Apr 2007 13:38:02 -0400
Subject: inline file data in extents

---
 ctree.h      | 32 ++++++++++++++++++++++++++++++++
 print-tree.c |  6 ++++++
 2 files changed, 38 insertions(+)

diff --git a/ctree.h b/ctree.h
index 1dca9cb0..308008af 100644
--- a/ctree.h
+++ b/ctree.h
@@ -200,8 +200,12 @@ struct btrfs_root_item {
 	__le32 refs;
 } __attribute__ ((__packed__));
 
+#define BTRFS_FILE_EXTENT_REG 0
+#define BTRFS_FILE_EXTENT_INLINE 1
+
 struct btrfs_file_extent_item {
 	__le64 generation;
+	u8 type;
 	/*
 	 * disk space consumed by the extent, checksum blocks are included
 	 * in these numbers
@@ -849,6 +853,34 @@ static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l)
 	return (u8 *)l->items;
 }
 
+static inline int btrfs_file_extent_type(struct btrfs_file_extent_item *e)
+{
+	return e->type;
+}
+static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item *e,
+					      u8 val)
+{
+	e->type = val;
+}
+
+static inline char *btrfs_file_extent_inline_start(struct
+						   btrfs_file_extent_item *e)
+{
+	return (char *)(&e->disk_blocknr);
+}
+
+static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
+{
+	return (unsigned long)(&((struct
+		  btrfs_file_extent_item *)NULL)->disk_blocknr) + datasize;
+}
+
+static inline u32 btrfs_file_extent_inline_len(struct btrfs_item *e)
+{
+	struct btrfs_file_extent_item *fe = NULL;
+	return btrfs_item_size(e) - (unsigned long)(&fe->disk_blocknr);
+}
+
 static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item
 						 *e)
 {
diff --git a/print-tree.c b/print-tree.c
index 12787c67..d56860bb 100644
--- a/print-tree.c
+++ b/print-tree.c
@@ -85,6 +85,12 @@ void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
 		case BTRFS_EXTENT_DATA_KEY:
 			fi = btrfs_item_ptr(l, i,
 					    struct btrfs_file_extent_item);
+			if (btrfs_file_extent_type(fi) ==
+			    BTRFS_FILE_EXTENT_INLINE) {
+				printf("\t\tinline extent data size %u\n",
+			           btrfs_file_extent_inline_len(l->items + i));
+				break;
+			}
 			printf("\t\textent data disk block %Lu nr %Lu\n",
 			       btrfs_file_extent_disk_blocknr(fi),
 			       btrfs_file_extent_disk_num_blocks(fi));
-- 
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