1 files changed, 203 insertions, 105 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 4414a5d9983a..ce3ab4e13064 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -45,6 +45,8 @@ struct btrfs_ordered_sum;
 
 #define BTRFS_MAX_LEVEL 8
 
+#define BTRFS_COMPAT_EXTENT_TREE_V0
+
 /*
  * files bigger than this get some pre-flushing when they are added
  * to the ordered operations list.  That way we limit the total
@@ -267,7 +269,18 @@ static inline unsigned long btrfs_chunk_item_size(int num_stripes)
 }
 
 #define BTRFS_FSID_SIZE 16
-#define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
+#define BTRFS_HEADER_FLAG_WRITTEN       (1ULL << 0)
+#define BTRFS_HEADER_FLAG_RELOC         (1ULL << 1)
+#define BTRFS_SUPER_FLAG_SEEDING        (1ULL << 32)
+#define BTRFS_SUPER_FLAG_METADUMP       (1ULL << 33)
+
+#define BTRFS_BACKREF_REV_MAX           256
+#define BTRFS_BACKREF_REV_SHIFT         56
+#define BTRFS_BACKREF_REV_MASK          (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
+                                         BTRFS_BACKREF_REV_SHIFT)
+
+#define BTRFS_OLD_BACKREF_REV           0
+#define BTRFS_MIXED_BACKREF_REV         1
 
 /*
  * every tree block (leaf or node) starts with this header.
@@ -296,7 +309,6 @@ struct btrfs_header {
                                         sizeof(struct btrfs_item) - \
                                         sizeof(struct btrfs_file_extent_item))
 
-#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
 
 /*
  * this is a very generous portion of the super block, giving us
@@ -355,9 +367,12 @@ struct btrfs_super_block {
  * Compat flags that we support.  If any incompat flags are set other than the
  * ones specified below then we will fail to mount
  */
-#define BTRFS_FEATURE_COMPAT_SUPP       0x0
-#define BTRFS_FEATURE_COMPAT_RO_SUPP    0x0
-#define BTRFS_FEATURE_INCOMPAT_SUPP     0x0
+#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF    (1ULL << 0)
+
+#define BTRFS_FEATURE_COMPAT_SUPP               0ULL
+#define BTRFS_FEATURE_COMPAT_RO_SUPP            0ULL
+#define BTRFS_FEATURE_INCOMPAT_SUPP             \
+        BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF
 
 /*
  * A leaf is full of items. offset and size tell us where to find
@@ -421,23 +436,65 @@ struct btrfs_path {
         unsigned int keep_locks:1;
         unsigned int skip_locking:1;
         unsigned int leave_spinning:1;
+        unsigned int search_commit_root:1;
 };
 
 /*
  * 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 {
+        __le64 refs;
+        __le64 generation;
+        __le64 flags;
+} __attribute__ ((__packed__));
+
+struct btrfs_extent_item_v0 {
         __le32 refs;
 } __attribute__ ((__packed__));
 
-struct btrfs_extent_ref {
+#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
+                                        sizeof(struct btrfs_item))
+
+#define BTRFS_EXTENT_FLAG_DATA          (1ULL << 0)
+#define BTRFS_EXTENT_FLAG_TREE_BLOCK    (1ULL << 1)
+
+/* following flags only apply to tree blocks */
+
+/* use full backrefs for extent pointers in the block */
+#define BTRFS_BLOCK_FLAG_FULL_BACKREF   (1ULL << 8)
+
+struct btrfs_tree_block_info {
+        struct btrfs_disk_key key;
+        u8 level;
+} __attribute__ ((__packed__));
+
+struct btrfs_extent_data_ref {
+        __le64 root;
+        __le64 objectid;
+        __le64 offset;
+        __le32 count;
+} __attribute__ ((__packed__));
+
+struct btrfs_shared_data_ref {
+        __le32 count;
+} __attribute__ ((__packed__));
+
+struct btrfs_extent_inline_ref {
+        u8 type;
+        u64 offset;
+} __attribute__ ((__packed__));
+
+/* old style backrefs item */
+struct btrfs_extent_ref_v0 {
         __le64 root;
         __le64 generation;
         __le64 objectid;
-        __le32 num_refs;
+        __le32 count;
 } __attribute__ ((__packed__));
 
+
 /* dev extents record free space on individual devices.  The owner
  * field points back to the chunk allocation mapping tree that allocated
  * the extent.  The chunk tree uuid field is a way to double check the owner
@@ -695,12 +752,7 @@ struct btrfs_block_group_cache {
         struct list_head cluster_list;
 };
 
-struct btrfs_leaf_ref_tree {
-        struct rb_root root;
-        struct list_head list;
-        spinlock_t lock;
-};
-
+struct reloc_control;
 struct btrfs_device;
 struct btrfs_fs_devices;
 struct btrfs_fs_info {
@@ -831,18 +883,11 @@ struct btrfs_fs_info {
         struct task_struct *cleaner_kthread;
         int thread_pool_size;
 
-        /* tree relocation relocated fields */
-        struct list_head dead_reloc_roots;
-        struct btrfs_leaf_ref_tree reloc_ref_tree;
-        struct btrfs_leaf_ref_tree shared_ref_tree;
-
         struct kobject super_kobj;
         struct completion kobj_unregister;
         int do_barriers;
         int closing;
         int log_root_recovering;
-        atomic_t throttles;
-        atomic_t throttle_gen;
 
         u64 total_pinned;
 
@@ -861,6 +906,8 @@ struct btrfs_fs_info {
          */
         struct list_head space_info;
 
+        struct reloc_control *reloc_ctl;
+
         spinlock_t delalloc_lock;
         spinlock_t new_trans_lock;
         u64 delalloc_bytes;
@@ -891,7 +938,6 @@ struct btrfs_fs_info {
  * in ram representation of the tree.  extent_root is used for all allocations
  * and for the extent tree extent_root root.
  */
-struct btrfs_dirty_root;
 struct btrfs_root {
         struct extent_buffer *node;
 
@@ -899,9 +945,6 @@ struct btrfs_root {
         spinlock_t node_lock;
 
         struct extent_buffer *commit_root;
-        struct btrfs_leaf_ref_tree *ref_tree;
-        struct btrfs_leaf_ref_tree ref_tree_struct;
-        struct btrfs_dirty_root *dirty_root;
         struct btrfs_root *log_root;
         struct btrfs_root *reloc_root;
 
@@ -952,10 +995,15 @@ struct btrfs_root {
         /* the dirty list is only used by non-reference counted roots */
         struct list_head dirty_list;
 
+        struct list_head root_list;
+
         spinlock_t list_lock;
-        struct list_head dead_list;
         struct list_head orphan_list;
 
+        spinlock_t inode_lock;
+        /* red-black tree that keeps track of in-memory inodes */
+        struct rb_root inode_tree;
+
         /*
          * right now this just gets used so that a root has its own devid
          * for stat.  It may be used for more later
@@ -1017,7 +1065,16 @@ struct btrfs_root {
  * are used, and how many references there are to each block
  */
 #define BTRFS_EXTENT_ITEM_KEY   168
-#define BTRFS_EXTENT_REF_KEY    180
+
+#define BTRFS_TREE_BLOCK_REF_KEY        176
+
+#define BTRFS_EXTENT_DATA_REF_KEY       178
+
+#define BTRFS_EXTENT_REF_V0_KEY         180
+
+#define BTRFS_SHARED_BLOCK_REF_KEY      182
+
+#define BTRFS_SHARED_DATA_REF_KEY       184
 
 /*
  * block groups give us hints into the extent allocation trees.  Which
@@ -1317,24 +1374,67 @@ static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
         return (u8 *)((unsigned long)dev + ptr);
 }
 
-/* struct btrfs_extent_ref */
-BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
-BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
-BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
-BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
+BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
+BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
+                   generation, 64);
+BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
 
-BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
-BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
-                         generation, 64);
-BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
-                         objectid, 64);
-BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
-                         num_refs, 32);
+BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
+
+
+BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
+
+static inline void btrfs_tree_block_key(struct extent_buffer *eb,
+                                        struct btrfs_tree_block_info *item,
+                                        struct btrfs_disk_key *key)
+{
+        read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
+}
+
+static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
+                                            struct btrfs_tree_block_info *item,
+                                            struct btrfs_disk_key *key)
+{
+        write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
+}
 
-/* struct btrfs_extent_item */
-BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
-BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
-                         refs, 32);
+BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
+                   root, 64);
+BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
+                   objectid, 64);
+BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
+                   offset, 64);
+BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
+                   count, 32);
+
+BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
+                   count, 32);
+
+BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
+                   type, 8);
+BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
+                   offset, 64);
+
+static inline u32 btrfs_extent_inline_ref_size(int type)
+{
+        if (type == BTRFS_TREE_BLOCK_REF_KEY ||
+            type == BTRFS_SHARED_BLOCK_REF_KEY)
+                return sizeof(struct btrfs_extent_inline_ref);
+        if (type == BTRFS_SHARED_DATA_REF_KEY)
+                return sizeof(struct btrfs_shared_data_ref) +
+                       sizeof(struct btrfs_extent_inline_ref);
+        if (type == BTRFS_EXTENT_DATA_REF_KEY)
+                return sizeof(struct btrfs_extent_data_ref) +
+                       offsetof(struct btrfs_extent_inline_ref, offset);
+        BUG();
+        return 0;
+}
+
+BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
+BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
+                   generation, 64);
+BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
+BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
 
 /* struct btrfs_node */
 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
@@ -1558,6 +1658,21 @@ static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
         return (flags & flag) == flag;
 }
 
+static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
+{
+        u64 flags = btrfs_header_flags(eb);
+        return flags >> BTRFS_BACKREF_REV_SHIFT;
+}
+
+static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
+                                                int rev)
+{
+        u64 flags = btrfs_header_flags(eb);
+        flags &= ~BTRFS_BACKREF_REV_MASK;
+        flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
+        btrfs_set_header_flags(eb, flags);
+}
+
 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
 {
         unsigned long ptr = offsetof(struct btrfs_header, fsid);
@@ -1790,39 +1905,32 @@ int btrfs_update_pinned_extents(struct btrfs_root *root,
 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
                         struct btrfs_root *root, struct extent_buffer *leaf);
 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
-                          struct btrfs_root *root, u64 objectid, u64 bytenr);
+                          struct btrfs_root *root,
+                          u64 objectid, u64 offset, u64 bytenr);
 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
 struct btrfs_block_group_cache *btrfs_lookup_block_group(
                                                  struct btrfs_fs_info *info,
                                                  u64 bytenr);
+void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
 u64 btrfs_find_block_group(struct btrfs_root *root,
                            u64 search_start, u64 search_hint, int owner);
 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
-                                             struct btrfs_root *root,
-                                             u32 blocksize, u64 parent,
-                                             u64 root_objectid,
-                                             u64 ref_generation,
-                                             int level,
-                                             u64 hint,
-                                             u64 empty_size);
+                                        struct btrfs_root *root, u32 blocksize,
+                                        u64 parent, u64 root_objectid,
+                                        struct btrfs_disk_key *key, int level,
+                                        u64 hint, u64 empty_size);
 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
                                             struct btrfs_root *root,
                                             u64 bytenr, u32 blocksize,
                                             int level);
-int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
-                       struct btrfs_root *root,
-                       u64 num_bytes, u64 parent, u64 min_bytes,
-                       u64 root_objectid, u64 ref_generation,
-                       u64 owner, u64 empty_size, u64 hint_byte,
-                       u64 search_end, struct btrfs_key *ins, u64 data);
-int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
-                                struct btrfs_root *root, u64 parent,
-                                u64 root_objectid, u64 ref_generation,
-                                u64 owner, struct btrfs_key *ins);
-int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
-                                struct btrfs_root *root, u64 parent,
-                                u64 root_objectid, u64 ref_generation,
-                                u64 owner, struct btrfs_key *ins);
+int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
+                                     struct btrfs_root *root,
+                                     u64 root_objectid, u64 owner,
+                                     u64 offset, struct btrfs_key *ins);
+int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
+                                   struct btrfs_root *root,
+                                   u64 root_objectid, u64 owner, u64 offset,
+                                   struct btrfs_key *ins);
 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
                                   struct btrfs_root *root,
                                   u64 num_bytes, u64 min_alloc_size,
@@ -1830,18 +1938,18 @@ int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
                                   u64 search_end, struct btrfs_key *ins,
                                   u64 data);
 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-                  struct extent_buffer *orig_buf, struct extent_buffer *buf,
-                  u32 *nr_extents);
-int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-                    struct extent_buffer *buf, u32 nr_extents);
-int btrfs_update_ref(struct btrfs_trans_handle *trans,
-                     struct btrfs_root *root, struct extent_buffer *orig_buf,
-                     struct extent_buffer *buf, int start_slot, int nr);
+                  struct extent_buffer *buf, int full_backref);
+int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
+                  struct extent_buffer *buf, int full_backref);
+int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
+                                struct btrfs_root *root,
+                                u64 bytenr, u64 num_bytes, u64 flags,
+                                int is_data);
 int btrfs_free_extent(struct btrfs_trans_handle *trans,
                       struct btrfs_root *root,
                       u64 bytenr, u64 num_bytes, u64 parent,
-                      u64 root_objectid, u64 ref_generation,
-                      u64 owner_objectid, int pin);
+                      u64 root_objectid, u64 owner, u64 offset);
+
 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
                                struct btrfs_root *root,
@@ -1849,13 +1957,8 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
                          struct btrfs_root *root,
                          u64 bytenr, u64 num_bytes, u64 parent,
-                         u64 root_objectid, u64 ref_generation,
-                         u64 owner_objectid);
-int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
-                            struct btrfs_root *root, u64 bytenr, u64 num_bytes,
-                            u64 orig_parent, u64 parent,
-                            u64 root_objectid, u64 ref_generation,
-                            u64 owner_objectid);
+                         u64 root_objectid, u64 owner, u64 offset);
+
 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
                                     struct btrfs_root *root);
 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
@@ -1867,16 +1970,9 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
                            u64 size);
 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
                              struct btrfs_root *root, u64 group_start);
-int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
-int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
-                          struct btrfs_root *root);
-int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
-int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
-                               struct btrfs_root *root,
-                               struct extent_buffer *buf, u64 orig_start);
-int btrfs_add_dead_reloc_root(struct btrfs_root *root);
-int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
-int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
+int btrfs_prepare_block_group_relocation(struct btrfs_root *root,
+                                struct btrfs_block_group_cache *group);
+
 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
@@ -1891,13 +1987,12 @@ void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode,
 void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode,
                               u64 bytes);
 /* ctree.c */
+int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
+                     int level, int *slot);
+int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
 int btrfs_previous_item(struct btrfs_root *root,
                         struct btrfs_path *path, u64 min_objectid,
                         int type);
-int btrfs_merge_path(struct btrfs_trans_handle *trans,
-                     struct btrfs_root *root,
-                     struct btrfs_key *node_keys,
-                     u64 *nodes, int lowest_level);
 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
                             struct btrfs_root *root, struct btrfs_path *path,
                             struct btrfs_key *new_key);
@@ -1918,6 +2013,8 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans,
                       struct btrfs_root *root,
                       struct extent_buffer *buf,
                       struct extent_buffer **cow_ret, u64 new_root_objectid);
+int btrfs_block_can_be_shared(struct btrfs_root *root,
+                              struct extent_buffer *buf);
 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
                       *root, struct btrfs_path *path, u32 data_size);
 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
@@ -1944,9 +2041,6 @@ void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
 
 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
                    struct btrfs_path *path, int slot, int nr);
-int btrfs_del_leaf(struct btrfs_trans_handle *trans,
-                            struct btrfs_root *root,
-                            struct btrfs_path *path, u64 bytenr);
 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
                                  struct btrfs_root *root,
                                  struct btrfs_path *path)
@@ -2005,8 +2099,9 @@ int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
                          btrfs_root_item *item, struct btrfs_key *key);
 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
                       u64 *found_objectid);
-int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
-                          struct btrfs_root *latest_root);
+int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
+int btrfs_set_root_node(struct btrfs_root_item *item,
+                        struct extent_buffer *node);
 /* dir-item.c */
 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
                           struct btrfs_root *root, const char *name,
@@ -2139,7 +2234,6 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
 int btrfs_readpage(struct file *file, struct page *page);
 void btrfs_delete_inode(struct inode *inode);
 void btrfs_put_inode(struct inode *inode);
-void btrfs_read_locked_inode(struct inode *inode);
 int btrfs_write_inode(struct inode *inode, int wait);
 void btrfs_dirty_inode(struct inode *inode);
 struct inode *btrfs_alloc_inode(struct super_block *sb);
@@ -2147,12 +2241,8 @@ void btrfs_destroy_inode(struct inode *inode);
 int btrfs_init_cachep(void);
 void btrfs_destroy_cachep(void);
 long btrfs_ioctl_trans_end(struct file *file);
-struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
-                            struct btrfs_root *root, int wait);
-struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
-                                struct btrfs_root *root);
 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
-                         struct btrfs_root *root, int *is_new);
+                         struct btrfs_root *root);
 int btrfs_commit_write(struct file *file, struct page *page,
                        unsigned from, unsigned to);
 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
@@ -2209,4 +2299,12 @@ int btrfs_check_acl(struct inode *inode, int mask);
 int btrfs_init_acl(struct inode *inode, struct inode *dir);
 int btrfs_acl_chmod(struct inode *inode);
 
+/* relocation.c */
+int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
+int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
+                          struct btrfs_root *root);
+int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
+                            struct btrfs_root *root);
+int btrfs_recover_relocation(struct btrfs_root *root);
+int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
 #endif