Add back pointers from the inode to the directory that referenced it

diff --git a/ctree.h b/ctree.h
index 174fb23..adf0973 100644 (file)
--- a/ctree.h
+++ b/ctree.h
@@ -192,6 +192,11 @@ struct btrfs_extent_ref {
        __le64 offset;
 } __attribute__ ((__packed__));
 
+struct btrfs_inode_ref {
+       __le16 name_len;
+       /* name goes here */
+} __attribute__ ((__packed__));
+
 struct btrfs_inode_timespec {
        __le64 sec;
        __le32 nsec;
@@ -352,7 +357,8 @@ struct btrfs_root {
  * the FS
  */
 #define BTRFS_INODE_ITEM_KEY           1
-#define BTRFS_XATTR_ITEM_KEY            2
+#define BTRFS_INODE_REF_KEY            2
+#define BTRFS_XATTR_ITEM_KEY           8
 
 /* reserve 3-15 close to the inode for later flexibility */
 
@@ -556,6 +562,10 @@ static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts,
 
 BTRFS_SETGET_STACK_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
 
+BTRFS_SETGET_STACK_FUNCS(inode_ref_name_len, struct btrfs_inode_ref,
+                        name_len, 16);
+
+
 BTRFS_SETGET_STACK_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
 BTRFS_SETGET_STACK_FUNCS(ref_generation, struct btrfs_extent_ref,
                         generation, 64);

diff --git a/print-tree.c b/print-tree.c
index 9c85f63..60cf27c 100644 (file)
--- a/print-tree.c
+++ b/print-tree.c
@@ -45,6 +45,24 @@ static int print_dir_item(struct btrfs_item *item,
        }
        return 0;
 }
+
+static int print_inode_ref_item(struct btrfs_item *item,
+                               struct btrfs_inode_ref *ref)
+{
+       u32 total;
+       u32 cur = 0;
+       u32 len;
+       total = btrfs_item_size(item);
+       while(cur < total) {
+               len = btrfs_inode_ref_name_len(ref);
+               printf("\t\tinode ref name: %.*s\n", len, (char *)(ref + 1));
+               len += sizeof(*ref);
+               ref = (struct btrfs_inode_ref *)((char *)ref + len);
+               cur += len;
+       }
+       return 0;
+}
+
 void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
 {
        int i;
@@ -58,6 +76,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
        struct btrfs_csum_item *ci;
        struct btrfs_block_group_item *bi;
        struct btrfs_extent_ref *ref;
+       struct btrfs_inode_ref *iref;
        u32 type;
 
        printf("leaf %llu ptrs %d free space %d generation %llu owner %llu\n",
@@ -86,6 +105,10 @@ void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
                               btrfs_inode_mode(ii),
                               btrfs_inode_nlink(ii));
                        break;
+               case BTRFS_INODE_REF_KEY:
+                       iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
+                       print_inode_ref_item(l->items + i, iref);
+                       break;
                case BTRFS_DIR_ITEM_KEY:
                        di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
                        print_dir_item(l->items + i, di);