# Re: \[PATCH V4 03/12\] kernfs: add an API to get kernfs node from inode number

- From: Tejun Heo \<tj@kernel.org\>
- Date: 2017-06-28 18:07:23 
- List: linux-block
- Page: https://ratatoskr.run/linux-block/2017/06/5031979
- Thread: https://ratatoskr.run/linux-block/2017/06/5031858/t.md

```text
On Wed, Jun 28, 2017 at 09:29:53AM -0700, Shaohua Li wrote:
> From: Shaohua Li <redacted>
> 
> Add an API to get kernfs node from inode number. We will need this to
> implement exportfs operations.
> 
> This API will be used in blktrace too later, so it should be as fast as
> possible. To make the API lock free, kernfs node is freed in RCU
> context. And we depend on kernfs_node count/ino number to filter out
> stale kernfs nodes.
> 
> Signed-off-by: Shaohua Li <redacted>

Acked-by: Tejun Heo <tj@kernel.org>

Thanks.

-- 
tejun
```