vboxsf: Make vboxsf_dir_create() return the handle for the created file

commit ab0c296 upstream

Make vboxsf_dir_create() optionally return the vboxsf-handle for
the created file. This is a preparation patch for adding atomic_open
support.

Fixes: 0fd1695 ("fs: Add VirtualBox guest shared folder (vboxsf) support")
Signed-off-by: Hans de Goede <[email protected]>
Signed-off-by: Sudip Mukherjee <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: jwrdegoede

fs/vboxsf/dir.c

@@ -253,7 +253,7 @@ static int vboxsf_dir_instantiate(struct inode *parent, struct dentry *dentry,
 }
 
 static int vboxsf_dir_create(struct inode *parent, struct dentry *dentry,
-			     umode_t mode, bool is_dir, bool excl)
+			     umode_t mode, bool is_dir, bool excl, u64 *handle_ret)
 {
 	struct vboxsf_inode *sf_parent_i = VBOXSF_I(parent);
 	struct vboxsf_sbi *sbi = VBOXSF_SBI(parent->i_sb);
@@ -278,28 +278,32 @@ static int vboxsf_dir_create(struct inode *parent, struct dentry *dentry,
 	if (params.result != SHFL_FILE_CREATED)
 		return -EPERM;
 
-	vboxsf_close(sbi->root, params.handle);
-
 	err = vboxsf_dir_instantiate(parent, dentry, &params.info);
 	if (err)
-		return err;
+		goto out;
 
 	/* parent directory access/change time changed */
 	sf_parent_i->force_restat = 1;
 
-	return 0;
+out:
+	if (err == 0 && handle_ret)
+		*handle_ret = params.handle;
+	else
+		vboxsf_close(sbi->root, params.handle);
+
+	return err;
 }
 
 static int vboxsf_dir_mkfile(struct inode *parent, struct dentry *dentry,
 			     umode_t mode, bool excl)
 {
-	return vboxsf_dir_create(parent, dentry, mode, false, excl);
+	return vboxsf_dir_create(parent, dentry, mode, false, excl, NULL);
 }
 
 static int vboxsf_dir_mkdir(struct inode *parent, struct dentry *dentry,
 			    umode_t mode)
 {
-	return vboxsf_dir_create(parent, dentry, mode, true, true);
+	return vboxsf_dir_create(parent, dentry, mode, true, true, NULL);
 }
 
 static int vboxsf_dir_unlink(struct inode *parent, struct dentry *dentry)