Netdev Archive on lore.kernel.org
 help / color / Atom feed
From: Erik Kline <ek@google.com>
To: "Ian K. Coolidge" <icoolidge@google.com>
Cc: netdev <netdev@vger.kernel.org>
Subject: Re: [PATCH] iproute2: ip addr: Accept 'optimistic' flag
Date: Sat, 23 May 2020 22:06:43 -0700
Message-ID: <CAAedzxqg8SJgwtvq=G9ZytAGhpZ=Q7MwJNPsm-XYs0p_zo-7ug@mail.gmail.com> (raw)
In-Reply-To: <20200524015144.44017-1-icoolidge@google.com>


[-- Attachment #1: Type: text/plain, Size: 2894 bytes --]

patched and tested on a 5.6.13 system

Acked-by: Erik Kline <ek@google.com>


On Sat, 23 May 2020 at 19:01, Ian K. Coolidge <icoolidge@google.com> wrote:
>
> This allows addresses added to use IPv6 optimistic DAD.
> ---
>  ip/ipaddress.c           | 7 ++++++-
>  man/man8/ip-address.8.in | 7 ++++++-
>  2 files changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/ip/ipaddress.c b/ip/ipaddress.c
> index 80d27ce2..48cf5e41 100644
> --- a/ip/ipaddress.c
> +++ b/ip/ipaddress.c
> @@ -72,7 +72,7 @@ static void usage(void)
>                 "           [-]tentative | [-]deprecated | [-]dadfailed | temporary |\n"
>                 "           CONFFLAG-LIST ]\n"
>                 "CONFFLAG-LIST := [ CONFFLAG-LIST ] CONFFLAG\n"
> -               "CONFFLAG  := [ home | nodad | mngtmpaddr | noprefixroute | autojoin ]\n"
> +               "CONFFLAG  := [ home | nodad | optimistic | mngtmpaddr | noprefixroute | autojoin ]\n"
>                 "LIFETIME := [ valid_lft LFT ] [ preferred_lft LFT ]\n"
>                 "LFT := forever | SECONDS\n"
>                 "TYPE := { vlan | veth | vcan | vxcan | dummy | ifb | macvlan | macvtap |\n"
> @@ -2335,6 +2335,11 @@ static int ipaddr_modify(int cmd, int flags, int argc, char **argv)
>                                 ifa_flags |= IFA_F_HOMEADDRESS;
>                         else
>                                 fprintf(stderr, "Warning: home option can be set only for IPv6 addresses\n");
> +               } else if (strcmp(*argv, "optimistic") == 0) {
> +                       if (req.ifa.ifa_family == AF_INET6)
> +                               ifa_flags |= IFA_F_OPTIMISTIC;
> +                       else
> +                               fprintf(stderr, "Warning: optimistic option can be set only for IPv6 addresses\n");
>                 } else if (strcmp(*argv, "nodad") == 0) {
>                         if (req.ifa.ifa_family == AF_INET6)
>                                 ifa_flags |= IFA_F_NODAD;
> diff --git a/man/man8/ip-address.8.in b/man/man8/ip-address.8.in
> index 2a553190..fe773c91 100644
> --- a/man/man8/ip-address.8.in
> +++ b/man/man8/ip-address.8.in
> @@ -92,7 +92,7 @@ ip-address \- protocol address management
>
>  .ti -8
>  .IR CONFFLAG " := "
> -.RB "[ " home " | " mngtmpaddr " | " nodad " | " noprefixroute " | " autojoin " ]"
> +.RB "[ " home " | " mngtmpaddr " | " nodad " | " optimstic " | " noprefixroute " | " autojoin " ]"
>
>  .ti -8
>  .IR LIFETIME " := [ "
> @@ -258,6 +258,11 @@ stateless auto-configuration was active.
>  (IPv6 only) do not perform Duplicate Address Detection (RFC 4862) when
>  adding this address.
>
> +.TP
> +.B optimistic
> +(IPv6 only) When performing Duplicate Address Detection, use the RFC 4429
> +optimistic variant.
> +
>  .TP
>  .B noprefixroute
>  Do not automatically create a route for the network prefix of the added
> --
> 2.27.0.rc0.183.gde8f92d652-goog
>

[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/pkcs7-signature, Size: 3842 bytes --]

  reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-24  1:51 Ian K. Coolidge
2020-05-24  5:06 ` Erik Kline [this message]
2020-05-24 19:09 ` Stephen Hemminger
2020-05-27 18:03 ` [PATCH v2 1/2] iproute2: ip addr: Organize flag properties structurally Ian K. Coolidge
2020-05-27 18:03   ` [PATCH v2 2/2] iproute2: ip addr: Add support for setting 'optimistic' Ian K. Coolidge
2020-05-31 23:09   ` [PATCH v2 1/2] iproute2: ip addr: Organize flag properties structurally David Ahern

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAAedzxqg8SJgwtvq=G9ZytAGhpZ=Q7MwJNPsm-XYs0p_zo-7ug@mail.gmail.com' \
    --to=ek@google.com \
    --cc=icoolidge@google.com \
    --cc=netdev@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Netdev Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/netdev/0 netdev/git/0.git
	git clone --mirror https://lore.kernel.org/netdev/1 netdev/git/1.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 netdev netdev/ https://lore.kernel.org/netdev \
		netdev@vger.kernel.org
	public-inbox-index netdev

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.netdev


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git