linux-kernel - Re: [PATCH V4 03/12] kernfs: add an API to get kernfs node from inode number

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Message-ID: <20170629125038.GB26046@kroah.com>
Date:   Thu, 29 Jun 2017 14:50:38 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Shaohua Li <shli@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        tj@...nel.org, hch@....de, axboe@...com, rostedt@...dmis.org,
        lizefan@...wei.com, Kernel-team@...com, Shaohua Li <shli@...com>
Subject: Re: [PATCH V4 03/12] kernfs: add an API to get kernfs node from
 inode number

On Wed, Jun 28, 2017 at 09:29:53AM -0700, Shaohua Li wrote:
> From: Shaohua Li <shli@...com>
> 
> 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 <shli@...com>

Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>