From e3815ddde6e8ffdc7bec54a04611cfc243862372 Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@redhat.com>
Date: Fri, 16 Nov 2007 11:46:07 -0500
Subject: [PATCH] xattr support for btrfs-progs

---
 ctree.h      | 28 +++++++++++++++-------------
 dir-item.c   |  4 ++--
 print-tree.c | 11 +++++++----
 3 files changed, 24 insertions(+), 19 deletions(-)

diff --git a/ctree.h b/ctree.h
index 4539eae1..2f55b15e 100644
--- a/ctree.h
+++ b/ctree.h
@@ -53,7 +53,8 @@ struct btrfs_trans_handle;
 #define BTRFS_FT_FIFO		5
 #define BTRFS_FT_SOCK		6
 #define BTRFS_FT_SYMLINK	7
-#define BTRFS_FT_MAX		8
+#define BTRFS_FT_XATTR		8
+#define BTRFS_FT_MAX		9
 
 /*
  * the key defines the order in the tree, and so it also defines (optimal)
@@ -216,7 +217,7 @@ struct btrfs_inline_data_item {
 
 struct btrfs_dir_item {
 	struct btrfs_disk_key location;
-	__le16 flags;
+	__le16 data_len;
 	__le16 name_len;
 	u8 type;
 } __attribute__ ((__packed__));
@@ -339,8 +340,9 @@ struct btrfs_root {
  * the FS
  */
 #define BTRFS_INODE_ITEM_KEY		1
+#define BTRFS_XATTR_ITEM_KEY            2
 
-/* reserve 2-15 close to the inode for later flexibility */
+/* reserve 3-15 close to the inode for later flexibility */
 
 /*
  * dir items are the name -> inode pointers in a directory.  There is one
@@ -587,16 +589,6 @@ static inline void btrfs_set_item_size(struct btrfs_item *item, u32 val)
 	item->size = cpu_to_le32(val);
 }
 
-static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d)
-{
-	return le16_to_cpu(d->flags);
-}
-
-static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val)
-{
-	d->flags = cpu_to_le16(val);
-}
-
 static inline u8 btrfs_dir_type(struct btrfs_dir_item *d)
 {
 	return d->type;
@@ -617,6 +609,16 @@ static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val)
 	d->name_len = cpu_to_le16(val);
 }
 
+static inline u16 btrfs_dir_data_len(struct btrfs_dir_item *d)
+{
+	return le16_to_cpu(d->data_len);
+}
+
+static inline void btrfs_set_dir_data_len(struct btrfs_dir_item *d, u16 val)
+{
+	d->data_len = cpu_to_le16(val);
+}
+
 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
 					 struct btrfs_disk_key *disk)
 {
diff --git a/dir-item.c b/dir-item.c
index c681bebb..3c49c569 100644
--- a/dir-item.c
+++ b/dir-item.c
@@ -82,8 +82,8 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
 	}
 	btrfs_cpu_key_to_disk(&dir_item->location, location);
 	btrfs_set_dir_type(dir_item, type);
-	btrfs_set_dir_flags(dir_item, 0);
 	btrfs_set_dir_name_len(dir_item, name_len);
+	btrfs_set_dir_data_len(dir_item, 0);
 	name_ptr = (char *)(dir_item + 1);
 	memcpy(name_ptr, name, name_len);
 
@@ -101,8 +101,8 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
 	}
 	btrfs_cpu_key_to_disk(&dir_item->location, location);
 	btrfs_set_dir_type(dir_item, type);
-	btrfs_set_dir_flags(dir_item, 0);
 	btrfs_set_dir_name_len(dir_item, name_len);
+	btrfs_set_dir_data_len(dir_item, 0);
 	name_ptr = (char *)(dir_item + 1);
 	memcpy(name_ptr, name, name_len);
 out:
diff --git a/print-tree.c b/print-tree.c
index 90d55073..dd442c53 100644
--- a/print-tree.c
+++ b/print-tree.c
@@ -31,13 +31,15 @@ static int print_dir_item(struct btrfs_item *item,
 	u32 len;
 	total = btrfs_item_size(item);
 	while(cur < total) {
-		printf("\t\tdir index %llu flags %u type %u\n",
+		printf("\t\tdir index %llu type %u\n",
 		     (unsigned long long)btrfs_disk_key_objectid(&di->location),
-		     btrfs_dir_flags(di),
 		     btrfs_dir_type(di));
-		printf("\t\tname %.*s\n",
+		printf("\t\tname: %.*s\n",
 		       btrfs_dir_name_len(di),(char *)(di + 1));
-		len = sizeof(*di) + btrfs_dir_name_len(di);
+		if (btrfs_dir_data_len(di))
+			printf("\t\tdata: %.*s\n", btrfs_dir_data_len(di),
+			       (char *)((char *)(di + 1) + btrfs_dir_name_len(di)));
+		len = sizeof(*di) + btrfs_dir_name_len(di) + btrfs_dir_data_len(di);
 		di = (struct btrfs_dir_item *)((char *)di + len);
 		cur += len;
 	}
@@ -87,6 +89,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
 			di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 			print_dir_item(l->items + i, di);
 			break;
+		case BTRFS_XATTR_ITEM_KEY:
 		case BTRFS_DIR_INDEX_KEY:
 			di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 			print_dir_item(l->items + i, di);