---
title: vfsioattr
framework: Kernel
role: symbol
platforms: [macOS 10.6+]
path: kernel/vfsioattr
---

# vfsioattr

## Declaration

```occ
struct vfsioattr {
    ...
};
```

## Topics

### Instance Properties

- [io_devblocksize](kernel/vfsioattr/1523519-io_devblocksize.md)
- [io_flags](kernel/vfsioattr/1523118-io_flags.md)
- [io_maxreadcnt](kernel/vfsioattr/1523541-io_maxreadcnt.md)
- [io_maxsegreadsize](kernel/vfsioattr/1523120-io_maxsegreadsize.md)
- [io_maxsegwritesize](kernel/vfsioattr/1523400-io_maxsegwritesize.md)
- [io_maxwritecnt](kernel/vfsioattr/1523115-io_maxwritecnt.md)
- [io_segreadcnt](kernel/vfsioattr/1523265-io_segreadcnt.md)
- [io_segwritecnt](kernel/vfsioattr/1523176-io_segwritecnt.md)