netdev - Re: [PATCH v2 net] net/sched: act_mpls: Add softdep on mpls

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Date:   Tue, 27 Oct 2020 22:39:51 +0100
From:   Guillaume Nault <gnault@...hat.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Alexander Ovechkin <ovov@...dex-team.ru>,
        David Ahern <dsahern@...il.com>
Subject: Re: [PATCH v2 net] net/sched: act_mpls: Add softdep on mpls_gso.ko

On Tue, Oct 27, 2020 at 10:28:29AM -0700, Cong Wang wrote:
> On Mon, Oct 26, 2020 at 4:23 AM Guillaume Nault <gnault@...hat.com> wrote:
> >
> > TCA_MPLS_ACT_PUSH and TCA_MPLS_ACT_MAC_PUSH might be used on gso
> > packets. Such packets will thus require mpls_gso.ko for segmentation.
> 
> Any reason not to call request_module() at run time?

So that mpls_gso would be loaded only when initialising the
TCA_MPLS_ACT_PUSH or TCA_MPLS_ACT_MAC_PUSH modes?

That could be done, but the dependency on mpls_gso wouldn't be visible
anymore with modinfo. I don't really mind, I just felt that such
information could be important for the end user.