[PATCH 1/2] file: Export receive_fd() to modules

Greg KH gregkh at linuxfoundation.org
Thu Apr 1 09:52:33 UTC 2021


On Thu, Apr 01, 2021 at 05:09:31PM +0800, Xie Yongji wrote:
> Export receive_fd() so that some modules can use
> it to pass file descriptor across processes without
> missing any security stuffs.
> 
> Signed-off-by: Xie Yongji <xieyongji at bytedance.com>
> ---
>  fs/file.c            | 6 ++++++
>  include/linux/file.h | 7 +++----
>  2 files changed, 9 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/file.c b/fs/file.c
> index 56986e55befa..2a80c6c3e147 100644
> --- a/fs/file.c
> +++ b/fs/file.c
> @@ -1107,6 +1107,12 @@ int receive_fd_replace(int new_fd, struct file *file, unsigned int o_flags)
>  	return new_fd;
>  }
>  
> +int receive_fd(struct file *file, unsigned int o_flags)
> +{
> +	return __receive_fd(file, NULL, o_flags);
> +}
> +EXPORT_SYMBOL(receive_fd);

What module uses this?

And why not EXPORT_SYMBOL_GPL()?

thanks,

greg k-h


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