netdev - Re: [PATCH iproute2] erspan: set erspan

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Message-ID: <CADvbK_dstTtXSz-jRgGvgDC8gXxpuH6kF7a=3WanfoGzGso74g@mail.gmail.com>
Date:   Tue, 18 Feb 2020 11:01:46 +0800
From:   Xin Long <lucien.xin@...il.com>
To:     David Ahern <dsahern@...il.com>
Cc:     network dev <netdev@...r.kernel.org>,
        Stephen Hemminger <stephen@...workplumber.org>,
        William Tu <u9012063@...il.com>
Subject: Re: [PATCH iproute2] erspan: set erspan_ver to 1 by default

On Tue, Feb 18, 2020 at 3:07 AM David Ahern <dsahern@...il.com> wrote:
>
> On 2/17/20 2:53 AM, Xin Long wrote:
> > Commit 289763626721 ("erspan: add erspan version II support")
> > breaks the command:
> >
> >  # ip link add erspan1 type erspan key 1 seq erspan 123 \
> >     local 10.1.0.2 remote 10.1.0.1
> >
> > as erspan_ver is set to 0 by default, then IFLA_GRE_ERSPAN_INDEX
> > won't be set in gre_parse_opt().
> >
> >   # ip -d link show erspan1
> >     ...
> >     erspan remote 10.1.0.1 local 10.1.0.2 ... erspan_index 0 erspan_ver 1
> >                                               ^^^^^^^^^^^^^^
> >
> > This patch is to change to set erspan_ver to 1 by default.
> >
> > Fixes: 289763626721 ("erspan: add erspan version II support")
> > Signed-off-by: Xin Long <lucien.xin@...il.com>
> > ---
> >  ip/link_gre.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/ip/link_gre.c b/ip/link_gre.c
> > index 15beb73..e42f21a 100644
> > --- a/ip/link_gre.c
> > +++ b/ip/link_gre.c
> > @@ -94,7 +94,7 @@ static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
> >       __u8 metadata = 0;
> >       __u32 fwmark = 0;
> >       __u32 erspan_idx = 0;
> > -     __u8 erspan_ver = 0;
> > +     __u8 erspan_ver = 1;
> >       __u8 erspan_dir = 0;
> >       __u16 erspan_hwid = 0;
> >
> >
>
> that seems correct to me.
>
> What about the v6 version? It defaults to 0 as well by the same Fixes tag.
yeah right, will post v2. Thanks.