diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index a94b05f..c520e13 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -183,7 +183,8 @@ static inline struct rb_node *tree_search(struct btrfs_ordered_inode_tree *tree,
  */
 static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
 				      u64 start, u64 len, u64 disk_len,
-				      int type, int dio, int compress_type)
+				      int type, int dio, int compress_type,
+				      int dedup, struct btrfs_dedup_hash *hash)
 {
 	struct btrfs_root *root = BTRFS_I(inode)->root;
 	struct btrfs_ordered_inode_tree *tree;
@@ -199,10 +200,23 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
 	entry->start = start;
 	entry->len = len;
 	if (!(BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM) &&
-	    !(type == BTRFS_ORDERED_NOCOW))
+	    !(type == BTRFS_ORDERED_NOCOW) && !dedup)
 		entry->csum_bytes_left = disk_len;
 	entry->disk_len = disk_len;
 	entry->bytes_left = len;
+	entry->dedup = dedup;
+	entry->hash = NULL;
+
+	if (!dedup && hash) {
+		entry->hash = kzalloc(btrfs_dedup_hash_size(hash->type),
+				      GFP_NOFS);
+		if (!entry->hash) {
+			kmem_cache_free(btrfs_ordered_extent_cache, entry);
+			return -ENOMEM;
+		}
+		memcpy(entry->hash, hash, btrfs_dedup_hash_size(hash->type));
+	}
+
 	entry->inode = igrab(inode);
 	entry->compress_type = compress_type;
 	entry->truncated_len = (u64)-1;
@@ -251,7 +265,17 @@ int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
 {
 	return __btrfs_add_ordered_extent(inode, file_offset, start, len,
 					  disk_len, type, 0,
-					  BTRFS_COMPRESS_NONE);
+					  BTRFS_COMPRESS_NONE, 0, NULL);
+}
+
+int btrfs_add_ordered_extent_dedup(struct inode *inode, u64 file_offset,
+				   u64 start, u64 len, u64 disk_len, int type,
+				   int dedup, struct btrfs_dedup_hash *hash,
+				   int compress_type)
+{
+	return __btrfs_add_ordered_extent(inode, file_offset, start, len,
+					  disk_len, type, 0,
+					  compress_type, dedup, hash);
 }
 
 int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset,
@@ -259,16 +283,17 @@ int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset,
 {
 	return __btrfs_add_ordered_extent(inode, file_offset, start, len,
 					  disk_len, type, 1,
-					  BTRFS_COMPRESS_NONE);
+					  BTRFS_COMPRESS_NONE, 0, NULL);
 }
 
 int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset,
 				      u64 start, u64 len, u64 disk_len,
-				      int type, int compress_type)
+				      int type, int compress_type,
+				      struct btrfs_dedup_hash *hash)
 {
 	return __btrfs_add_ordered_extent(inode, file_offset, start, len,
 					  disk_len, type, 0,
-					  compress_type);
+					  compress_type, 0, hash);
 }
 
 /*
@@ -530,6 +555,7 @@ void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry)
 			list_del(&sum->list);
 			kfree(sum);
 		}
+		kfree(entry->hash);
 		kmem_cache_free(btrfs_ordered_extent_cache, entry);
 	}
 }
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index 2468970..efbb11f 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -109,6 +109,9 @@ struct btrfs_ordered_extent {
 	/* compression algorithm */
 	int compress_type;
 
+	/* whether this ordered extent is marked for dedup or not */
+	int dedup;
+
 	/* reference count */
 	atomic_t refs;
 
@@ -135,6 +138,9 @@ struct btrfs_ordered_extent {
 	struct completion completion;
 	struct btrfs_work flush_work;
 	struct list_head work_list;
+
+	/* dedup hash of sha256 type */
+	struct btrfs_dedup_hash *hash;
 };
 
 /*
@@ -168,11 +174,16 @@ int btrfs_dec_test_first_ordered_pending(struct inode *inode,
 				   int uptodate);
 int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
 			     u64 start, u64 len, u64 disk_len, int type);
+int btrfs_add_ordered_extent_dedup(struct inode *inode, u64 file_offset,
+				   u64 start, u64 len, u64 disk_len, int type,
+				   int dedup, struct btrfs_dedup_hash *hash,
+				   int compress_type);
 int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset,
 				 u64 start, u64 len, u64 disk_len, int type);
 int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset,
 				      u64 start, u64 len, u64 disk_len,
-				      int type, int compress_type);
+				      int type, int compress_type,
+				      struct btrfs_dedup_hash *hash);
 void btrfs_add_ordered_sum(struct inode *inode,
 			   struct btrfs_ordered_extent *entry,
 			   struct btrfs_ordered_sum *sum);
