From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] connector: add parent pid and tgid to coredump and
 exit events
Date: Fri, 30 Mar 2018 12:59:21 -0400 (EDT)
Message-ID: <20180330.125921.653839794312978457.davem@davemloft.net>
References: <20180329141247.20943-1-sstrogin@cisco.com>
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Cc: zbr@ioremap.net, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, xe-linux-external@cisco.com,
        jderehag@hotmail.com, matt.helsley@gmail.com,
        minipli@googlemail.com
To: sstrogin@cisco.com
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From: Stefan Strogin <sstrogin@cisco.com>
Date: Thu, 29 Mar 2018 17:12:47 +0300

> diff --git a/include/uapi/linux/cn_proc.h b/include/uapi/linux/cn_proc.h
> index 68ff25414700..db210625cee8 100644
> --- a/include/uapi/linux/cn_proc.h
> +++ b/include/uapi/linux/cn_proc.h
> @@ -116,12 +116,16 @@ struct proc_event {
>  		struct coredump_proc_event {
>  			__kernel_pid_t process_pid;
>  			__kernel_pid_t process_tgid;
> +			__kernel_pid_t parent_pid;
> +			__kernel_pid_t parent_tgid;
>  		} coredump;
>  
>  		struct exit_proc_event {
>  			__kernel_pid_t process_pid;
>  			__kernel_pid_t process_tgid;
>  			__u32 exit_code, exit_signal;
> +			__kernel_pid_t parent_pid;
> +			__kernel_pid_t parent_tgid;
>  		} exit;
>  
>  	} event_data;

I don't think you can add these members without breaking UAPI.