netdev - Re: [PATCHv3 iproute2] erspan: set erspan

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Date:   Tue, 18 Feb 2020 09:16:46 -0800
From:   William Tu <u9012063@...il.com>
To:     Xin Long <lucien.xin@...il.com>
Cc:     network dev <netdev@...r.kernel.org>,
        Stephen Hemminger <stephen@...workplumber.org>,
        David Ahern <dsahern@...il.com>
Subject: Re: [PATCHv3 iproute2] erspan: set erspan_ver to 1 by default

On Mon, Feb 17, 2020 at 7:50 PM Xin Long <lucien.xin@...il.com> 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.
>
> v1->v2:
>   - no change.
> v2->v3:
>   - add the same fix for v6.
>
> Fixes: 289763626721 ("erspan: add erspan version II support")
> Signed-off-by: Xin Long <lucien.xin@...il.com>

LGTM. Thanks!
Acked-by: William Tu <u9012063@...il.com>

> ---
>  ip/link_gre.c  | 2 +-
>  ip/link_gre6.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
>
> 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;
>
> diff --git a/ip/link_gre6.c b/ip/link_gre6.c
> index 9d1741b..94a4ee7 100644
> --- a/ip/link_gre6.c
> +++ b/ip/link_gre6.c
> @@ -106,7 +106,7 @@ 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;
>
> --
> 2.1.0
>