1 files changed, 100 insertions, 67 deletions

diff --git a/fs/btrfs/extent-io-tree.h b/fs/btrfs/extent-io-tree.h
index 9d3a52d8f59a..0a18ca9c59c3 100644
--- a/fs/btrfs/extent-io-tree.h
+++ b/fs/btrfs/extent-io-tree.h
@@ -17,8 +17,8 @@ struct btrfs_inode;
 /* Bits for the extent state */
 enum {
 	ENUM_BIT(EXTENT_DIRTY),
-	ENUM_BIT(EXTENT_UPTODATE),
 	ENUM_BIT(EXTENT_LOCKED),
+	ENUM_BIT(EXTENT_DIO_LOCKED),
 	ENUM_BIT(EXTENT_NEW),
 	ENUM_BIT(EXTENT_DELALLOC),
 	ENUM_BIT(EXTENT_DEFRAG),
@@ -38,6 +38,11 @@ enum {
 	 */
 	ENUM_BIT(EXTENT_DELALLOC_NEW),
 	/*
+	 * Mark that a range is being locked for finishing an ordered extent.
+	 * Used together with EXTENT_LOCKED.
+	 */
+	ENUM_BIT(EXTENT_FINISHING_ORDERED),
+	/*
 	 * When an ordered extent successfully completes for a region marked as
 	 * a new delalloc range, use this flag when clearing a new delalloc
 	 * range to indicate that the VFS' inode number of bytes should be
@@ -67,6 +72,8 @@ enum {
 				 EXTENT_ADD_INODE_BYTES | \
 				 EXTENT_CLEAR_ALL_BITS)
 
+#define EXTENT_LOCK_BITS	(EXTENT_LOCKED | EXTENT_DIO_LOCKED)
+
 /*
  * Redefined bits above which are used only in the device allocation tree,
  * shouldn't be using EXTENT_LOCKED / EXTENT_BOUNDARY / EXTENT_CLEAR_META_RESV
@@ -127,90 +134,116 @@ struct extent_state {
 #endif
 };
 
-struct btrfs_inode *extent_io_tree_to_inode(struct extent_io_tree *tree);
-const struct btrfs_inode *extent_io_tree_to_inode_const(const struct extent_io_tree *tree);
-const struct btrfs_fs_info *extent_io_tree_to_fs_info(const struct extent_io_tree *tree);
-
-void extent_io_tree_init(struct btrfs_fs_info *fs_info,
-			 struct extent_io_tree *tree, unsigned int owner);
-void extent_io_tree_release(struct extent_io_tree *tree);
-
-int lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
-		struct extent_state **cached);
-
-int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
-		    struct extent_state **cached);
-
-int __init extent_state_init_cachep(void);
-void __cold extent_state_free_cachep(void);
-
-u64 count_range_bits(struct extent_io_tree *tree,
-		     u64 *start, u64 search_end,
-		     u64 max_bytes, u32 bits, int contig,
-		     struct extent_state **cached_state);
-
-void free_extent_state(struct extent_state *state);
-bool test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, u32 bit,
-		    struct extent_state *cached_state);
-bool test_range_bit_exists(struct extent_io_tree *tree, u64 start, u64 end, u32 bit);
-int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
-			     u32 bits, struct extent_changeset *changeset);
-int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
-		       u32 bits, struct extent_state **cached,
-		       struct extent_changeset *changeset);
-
-static inline int clear_extent_bit(struct extent_io_tree *tree, u64 start,
-				   u64 end, u32 bits,
-				   struct extent_state **cached)
+const struct btrfs_inode *btrfs_extent_io_tree_to_inode(const struct extent_io_tree *tree);
+const struct btrfs_fs_info *btrfs_extent_io_tree_to_fs_info(const struct extent_io_tree *tree);
+
+void btrfs_extent_io_tree_init(struct btrfs_fs_info *fs_info,
+			       struct extent_io_tree *tree, unsigned int owner);
+void btrfs_extent_io_tree_release(struct extent_io_tree *tree);
+int btrfs_lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, u32 bits,
+			   struct extent_state **cached);
+bool btrfs_try_lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+				u32 bits, struct extent_state **cached);
+
+static inline int btrfs_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
+				    struct extent_state **cached)
 {
-	return __clear_extent_bit(tree, start, end, bits, cached, NULL);
+	return btrfs_lock_extent_bits(tree, start, end, EXTENT_LOCKED, cached);
 }
 
-static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end,
-				struct extent_state **cached)
+static inline bool btrfs_try_lock_extent(struct extent_io_tree *tree, u64 start,
+					 u64 end, struct extent_state **cached)
 {
-	return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, cached, NULL);
+	return btrfs_try_lock_extent_bits(tree, start, end, EXTENT_LOCKED, cached);
 }
 
-static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start,
-				    u64 end, u32 bits)
+int __init btrfs_extent_state_init_cachep(void);
+void __cold btrfs_extent_state_free_cachep(void);
+
+u64 btrfs_count_range_bits(struct extent_io_tree *tree,
+			   u64 *start, u64 search_end,
+			   u64 max_bytes, u32 bits, int contig,
+			   struct extent_state **cached_state);
+
+void btrfs_free_extent_state(struct extent_state *state);
+bool btrfs_test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, u32 bit,
+			  struct extent_state *cached_state);
+bool btrfs_test_range_bit_exists(struct extent_io_tree *tree, u64 start, u64 end, u32 bit);
+void btrfs_get_range_bits(struct extent_io_tree *tree, u64 start, u64 end, u32 *bits,
+			  struct extent_state **cached_state);
+int btrfs_clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+				   u32 bits, struct extent_changeset *changeset);
+int btrfs_clear_extent_bit_changeset(struct extent_io_tree *tree, u64 start, u64 end,
+				     u32 bits, struct extent_state **cached,
+				     struct extent_changeset *changeset);
+
+static inline int btrfs_clear_extent_bit(struct extent_io_tree *tree, u64 start,
+					 u64 end, u32 bits,
+					 struct extent_state **cached)
 {
-	return clear_extent_bit(tree, start, end, bits, NULL);
+	return btrfs_clear_extent_bit_changeset(tree, start, end, bits, cached, NULL);
 }
 
-int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
-			   u32 bits, struct extent_changeset *changeset);
-int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
-		   u32 bits, struct extent_state **cached_state);
-
-static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start,
-		u64 end, struct extent_state **cached_state)
+static inline int btrfs_unlock_extent(struct extent_io_tree *tree, u64 start, u64 end,
+				      struct extent_state **cached)
 {
-	return __clear_extent_bit(tree, start, end, EXTENT_UPTODATE,
-				  cached_state, NULL);
+	return btrfs_clear_extent_bit_changeset(tree, start, end, EXTENT_LOCKED,
+						cached, NULL);
 }
 
-static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
-				     u64 end, struct extent_state **cached)
+static inline int btrfs_clear_extent_bits(struct extent_io_tree *tree, u64 start,
+					  u64 end, u32 bits)
 {
-	return clear_extent_bit(tree, start, end,
-				EXTENT_DIRTY | EXTENT_DELALLOC |
-				EXTENT_DO_ACCOUNTING, cached);
+	return btrfs_clear_extent_bit(tree, start, end, bits, NULL);
 }
 
-int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
-		       u32 bits, u32 clear_bits,
-		       struct extent_state **cached_state);
+int btrfs_set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
+				 u32 bits, struct extent_changeset *changeset);
+int btrfs_set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
+			 u32 bits, struct extent_state **cached_state);
 
-bool find_first_extent_bit(struct extent_io_tree *tree, u64 start,
-			   u64 *start_ret, u64 *end_ret, u32 bits,
-			   struct extent_state **cached_state);
-void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
-				 u64 *start_ret, u64 *end_ret, u32 bits);
-int find_contiguous_extent_bit(struct extent_io_tree *tree, u64 start,
-			       u64 *start_ret, u64 *end_ret, u32 bits);
+static inline int btrfs_clear_extent_dirty(struct extent_io_tree *tree, u64 start,
+					   u64 end, struct extent_state **cached)
+{
+	return btrfs_clear_extent_bit(tree, start, end,
+				      EXTENT_DIRTY | EXTENT_DELALLOC |
+				      EXTENT_DO_ACCOUNTING, cached);
+}
+
+int btrfs_convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
+			     u32 bits, u32 clear_bits,
+			     struct extent_state **cached_state);
+
+bool btrfs_find_first_extent_bit(struct extent_io_tree *tree, u64 start,
+				 u64 *start_ret, u64 *end_ret, u32 bits,
+				 struct extent_state **cached_state);
+void btrfs_find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
+				       u64 *start_ret, u64 *end_ret, u32 bits);
+bool btrfs_find_contiguous_extent_bit(struct extent_io_tree *tree, u64 start,
+				      u64 *start_ret, u64 *end_ret, u32 bits);
 bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start,
 			       u64 *end, u64 max_bytes,
 			       struct extent_state **cached_state);
+static inline int btrfs_lock_dio_extent(struct extent_io_tree *tree, u64 start,
+					u64 end, struct extent_state **cached)
+{
+	return btrfs_lock_extent_bits(tree, start, end, EXTENT_DIO_LOCKED, cached);
+}
+
+static inline bool btrfs_try_lock_dio_extent(struct extent_io_tree *tree, u64 start,
+					     u64 end, struct extent_state **cached)
+{
+	return btrfs_try_lock_extent_bits(tree, start, end, EXTENT_DIO_LOCKED, cached);
+}
+
+static inline int btrfs_unlock_dio_extent(struct extent_io_tree *tree, u64 start,
+					  u64 end, struct extent_state **cached)
+{
+	return btrfs_clear_extent_bit_changeset(tree, start, end, EXTENT_DIO_LOCKED,
+						cached, NULL);
+}
+
+struct extent_state *btrfs_next_extent_state(struct extent_io_tree *tree,
+					     struct extent_state *state);
 
 #endif /* BTRFS_EXTENT_IO_TREE_H */