diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 3c3abff..a381cd2 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1817,6 +1817,11 @@
 		goto out;
 	case SEEK_DATA:
 	case SEEK_HOLE:
+		if (offset >= i_size_read(inode)) {
+			mutex_unlock(&inode->i_mutex);
+			return -ENXIO;
+		}
+
 		ret = find_desired_extent(inode, &offset, origin);
 		if (ret) {
 			mutex_unlock(&inode->i_mutex);
@@ -1825,11 +1830,11 @@
 	}
 
 	if (offset < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET)) {
-		ret = -EINVAL;
+		offset = -EINVAL;
 		goto out;
 	}
 	if (offset > inode->i_sb->s_maxbytes) {
-		ret = -EINVAL;
+		offset = -EINVAL;
 		goto out;
 	}
 
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 4d14de6..b2d004a 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4018,7 +4018,8 @@
 		memcpy(&location, dentry->d_fsdata, sizeof(struct btrfs_key));
 		kfree(dentry->d_fsdata);
 		dentry->d_fsdata = NULL;
-		d_clear_need_lookup(dentry);
+		/* This thing is hashed, drop it for now */
+		d_drop(dentry);
 	} else {
 		ret = btrfs_inode_by_name(dir, dentry, &location);
 	}
@@ -4085,7 +4086,15 @@
 static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
 				   struct nameidata *nd)
 {
-	return d_splice_alias(btrfs_lookup_dentry(dir, dentry), dentry);
+	struct dentry *ret;
+
+	ret = d_splice_alias(btrfs_lookup_dentry(dir, dentry), dentry);
+	if (unlikely(d_need_lookup(dentry))) {
+		spin_lock(&dentry->d_lock);
+		dentry->d_flags &= ~DCACHE_NEED_LOOKUP;
+		spin_unlock(&dentry->d_lock);
+	}
+	return ret;
 }
 
 unsigned char btrfs_filetype_table[] = {
@@ -4125,7 +4134,8 @@
 
 	/* special case for "." */
 	if (filp->f_pos == 0) {
-		over = filldir(dirent, ".", 1, 1, btrfs_ino(inode), DT_DIR);
+		over = filldir(dirent, ".", 1,
+			       filp->f_pos, btrfs_ino(inode), DT_DIR);
 		if (over)
 			return 0;
 		filp->f_pos = 1;
@@ -4134,7 +4144,7 @@
 	if (filp->f_pos == 1) {
 		u64 pino = parent_ino(filp->f_path.dentry);
 		over = filldir(dirent, "..", 2,
-			       2, pino, DT_DIR);
+			       filp->f_pos, pino, DT_DIR);
 		if (over)
 			return 0;
 		filp->f_pos = 2;
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 3351b1b..d11fd28 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2177,6 +2177,11 @@
 	if (!(src_file->f_mode & FMODE_READ))
 		goto out_fput;
 
+	/* don't make the dst file partly checksummed */
+	if ((BTRFS_I(src)->flags & BTRFS_INODE_NODATASUM) !=
+	    (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM))
+		goto out_fput;
+
 	ret = -EISDIR;
 	if (S_ISDIR(src->i_mode) || S_ISDIR(inode->i_mode))
 		goto out_fput;
@@ -2226,6 +2231,10 @@
 			goto out_unlock;
 	}
 
+	/* truncate page cache pages from target inode range */
+	truncate_inode_pages_range(&inode->i_data, destoff,
+				   PAGE_CACHE_ALIGN(destoff + len) - 1);
+
 	/* do any pending delalloc/csum calc on src, one way or
 	   another, and lock file content */
 	while (1) {
@@ -2242,10 +2251,6 @@
 		btrfs_wait_ordered_range(src, off, len);
 	}
 
-	/* truncate page cache pages from target inode range */
-	truncate_inode_pages_range(&inode->i_data, off,
-				   ALIGN(off + len, PAGE_CACHE_SIZE) - 1);
-
 	/* clone data */
 	key.objectid = btrfs_ino(src);
 	key.type = BTRFS_EXTENT_DATA_KEY;
@@ -2442,7 +2447,6 @@
 			if (endoff > inode->i_size)
 				btrfs_i_size_write(inode, endoff);
 
-			BTRFS_I(inode)->flags = BTRFS_I(src)->flags;
 			ret = btrfs_update_inode(trans, root, inode);
 			BUG_ON(ret);
 			btrfs_end_transaction(trans, root);