1 files changed, 60 insertions, 22 deletions

diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h
index bdb6ce7e2eb4..095c36f3b612 100644
--- a/fs/ext4/ext4_extents.h
+++ b/fs/ext4/ext4_extents.h
@@ -119,17 +119,13 @@ struct ext4_ext_path {
  * structure for external API
  */
 
-#define EXT4_EXT_CACHE_NO       0
-#define EXT4_EXT_CACHE_GAP      1
-#define EXT4_EXT_CACHE_EXTENT   2
-
 /*
  * to be called by ext4_ext_walk_space()
  * negative retcode - error
  * positive retcode - signal for ext4_ext_walk_space(), see below
  * callback must return valid extent (passed or newly created)
  */
-typedef int (*ext_prepare_callback)(struct inode *, struct ext4_ext_path *,
+typedef int (*ext_prepare_callback)(struct inode *, ext4_lblk_t,
                                         struct ext4_ext_cache *,
                                         struct ext4_extent *, void *);
 
@@ -137,8 +133,11 @@ typedef int (*ext_prepare_callback)(struct inode *, struct ext4_ext_path *,
 #define EXT_BREAK      1
 #define EXT_REPEAT     2
 
-/* Maximum logical block in a file; ext4_extent's ee_block is __le32 */
-#define EXT_MAX_BLOCK   0xffffffff
+/*
+ * Maximum number of logical blocks in a file; ext4_extent's ee_block is
+ * __le32.
+ */
+#define EXT_MAX_BLOCKS  0xffffffff
 
 /*
  * EXT_INIT_MAX_LEN is the maximum number of blocks we can have in an
@@ -197,7 +196,7 @@ static inline unsigned short ext_depth(struct inode *inode)
 static inline void
 ext4_ext_invalidate_cache(struct inode *inode)
 {
-        EXT4_I(inode)->i_cached_extent.ec_type = EXT4_EXT_CACHE_NO;
+        EXT4_I(inode)->i_cached_extent.ec_len = 0;
 }
 
 static inline void ext4_ext_mark_uninitialized(struct ext4_extent *ext)
@@ -225,11 +224,60 @@ static inline void ext4_ext_mark_initialized(struct ext4_extent *ext)
         ext->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ext));
 }
 
+/*
+ * ext4_ext_pblock:
+ * combine low and high parts of physical block number into ext4_fsblk_t
+ */
+static inline ext4_fsblk_t ext4_ext_pblock(struct ext4_extent *ex)
+{
+        ext4_fsblk_t block;
+
+        block = le32_to_cpu(ex->ee_start_lo);
+        block |= ((ext4_fsblk_t) le16_to_cpu(ex->ee_start_hi) << 31) << 1;
+        return block;
+}
+
+/*
+ * ext4_idx_pblock:
+ * combine low and high parts of a leaf physical block number into ext4_fsblk_t
+ */
+static inline ext4_fsblk_t ext4_idx_pblock(struct ext4_extent_idx *ix)
+{
+        ext4_fsblk_t block;
+
+        block = le32_to_cpu(ix->ei_leaf_lo);
+        block |= ((ext4_fsblk_t) le16_to_cpu(ix->ei_leaf_hi) << 31) << 1;
+        return block;
+}
+
+/*
+ * ext4_ext_store_pblock:
+ * stores a large physical block number into an extent struct,
+ * breaking it into parts
+ */
+static inline void ext4_ext_store_pblock(struct ext4_extent *ex,
+                                         ext4_fsblk_t pb)
+{
+        ex->ee_start_lo = cpu_to_le32((unsigned long) (pb & 0xffffffff));
+        ex->ee_start_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) &
+                                      0xffff);
+}
+
+/*
+ * ext4_idx_store_pblock:
+ * stores a large physical block number into an index struct,
+ * breaking it into parts
+ */
+static inline void ext4_idx_store_pblock(struct ext4_extent_idx *ix,
+                                         ext4_fsblk_t pb)
+{
+        ix->ei_leaf_lo = cpu_to_le32((unsigned long) (pb & 0xffffffff));
+        ix->ei_leaf_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) &
+                                     0xffff);
+}
+
 extern int ext4_ext_calc_metadata_amount(struct inode *inode,
-                                         sector_t lblocks);
-extern ext4_fsblk_t ext_pblock(struct ext4_extent *ex);
-extern ext4_fsblk_t idx_pblock(struct ext4_extent_idx *);
-extern void ext4_ext_store_pblock(struct ext4_extent *, ext4_fsblk_t);
+                                         ext4_lblk_t lblocks);
 extern int ext4_extent_tree_init(handle_t *, struct inode *);
 extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
                                                    int num,
@@ -237,19 +285,9 @@ extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
 extern int ext4_can_extents_be_merged(struct inode *inode,
                                       struct ext4_extent *ex1,
                                       struct ext4_extent *ex2);
-extern int ext4_ext_try_to_merge(struct inode *inode,
-                                 struct ext4_ext_path *path,
-                                 struct ext4_extent *);
-extern unsigned int ext4_ext_check_overlap(struct inode *, struct ext4_extent *, struct ext4_ext_path *);
 extern int ext4_ext_insert_extent(handle_t *, struct inode *, struct ext4_ext_path *, struct ext4_extent *, int);
-extern int ext4_ext_walk_space(struct inode *, ext4_lblk_t, ext4_lblk_t,
-                                                        ext_prepare_callback, void *);
 extern struct ext4_ext_path *ext4_ext_find_extent(struct inode *, ext4_lblk_t,
                                                         struct ext4_ext_path *);
-extern int ext4_ext_search_left(struct inode *, struct ext4_ext_path *,
-                                                ext4_lblk_t *, ext4_fsblk_t *);
-extern int ext4_ext_search_right(struct inode *, struct ext4_ext_path *,
-                                                ext4_lblk_t *, ext4_fsblk_t *);
 extern void ext4_ext_drop_refs(struct ext4_ext_path *);
 extern int ext4_ext_check_inode(struct inode *inode);
 #endif /* _EXT4_EXTENTS */