---
title: vfs_iswriteupgrade
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.4+]
path: kernel/1523486-vfs_iswriteupgrade
---

# vfs_iswriteupgrade

Determine if a filesystem is mounted read-only but a request has been made to upgrade to read-write.

## Declaration

```occ
int vfs_iswriteupgrade(mount_t mp);
```

## Parameters

- `mp`: Mount to test.

## Return Value

Return Value Nonzero if a request has been made to update from read-only to read-write, else 0.