Re: [PATCH] net: bpf: add bpf_ktime_get_boot_ns()

[Alexei Starovoitov]

On Mon, Apr 20, 2020 at 01:26:43PM -0700, Maciej Åenczykowski wrote:
> From: Maciej Åenczykowski <maze@xxxxxxxxxx>
> 
> On a device like a cellphone which is constantly suspending
> and resuming CLOCK_MONOTONIC is not particularly useful for
> keeping track of or reacting to external network events.
> Instead you want to use CLOCK_BOOTTIME.
> 
> Hence add bpf_ktime_get_boot_ns() as a mirror of bpf_ktime_get_ns()
> based around CLOCK_BOOTTIME instead of CLOCK_MONOTONIC.
> 
> Signed-off-by: Maciej Åenczykowski <maze@xxxxxxxxxx>
...
> diff --git a/net/core/filter.c b/net/core/filter.c
> index 755867867e57..ec567d1e6fb9 100644
> --- a/net/core/filter.c
> +++ b/net/core/filter.c
> @@ -6009,6 +6009,8 @@ bpf_base_func_proto(enum bpf_func_id func_id)
>  		return &bpf_tail_call_proto;
>  	case BPF_FUNC_ktime_get_ns:
>  		return &bpf_ktime_get_ns_proto;
> +	case BPF_FUNC_ktime_get_boot_ns:
> +		return &bpf_ktime_get_boot_ns_proto;
>  	default:
>  		break;
>  	}

That part got moved into kernel/bpf/helpers.c in the mean time.
I fixed it up and applied. Thanks

In the future please cc bpf@vger for all bpf related patches.