> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/man9/vfs_root.9.md).

# VFS\_ROOT.9

`VFS_ROOT` — 返回文件系统的根 vnode

## 名称

`VFS_ROOT`

## 概要

```c
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/vnode.h>

int
VFS_ROOT(struct mount *mp, int flags, struct vnode **vpp)
```

## 描述

返回文件系统根目录的已锁定 vnode。

其参数为：

**`mp`** 文件系统。

**`flags`** 锁类型。可以是 `LK_EXCLUSIVE` 或 `LK_SHARED`。文件系统可以自由忽略 `flags` 参数，转而获取独占锁。

**`vpp`** 根 vnode 的返回参数。

## 参见

[VFS(9)](/man/man9/vfs.9.md), [vnode(9)](/man/man9/vnode.9.md)

## 作者

本手册页由 Doug Rabson 编写。


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