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Hello,
On Thu, 16 Jun 2016, Quentin Armitage wrote:
> When using HEAD from
> https://git.kernel.org/cgit/utils/kernel/ipvsadm/ipvsadm.git/,
> the command:
> ipvsadm --start-daemon backup --mcast-interface eth0.60 \
> --mcast-group ff02::1:81
> fails with the error message:
> Argument list too long
>
> whereas both:
> ipvsadm --start-daemon master --mcast-interface eth0.60 \
> --mcast-group ff02::1:81
> and:
> ipvsadm --start-daemon backup --mcast-interface eth0.60 \
> --mcast-group 224.0.0.81
> are successful.
>
> The error message "Argument list too long" isn't helpful. The error occurs
> because an IPv6 address is given in backup mode.
>
> The error is in make_receive_sock() in net/netfilter/ipvs/ip_vs_sync.c,
> since it fails to set the interface on the address or the socket before
> calling inet6_bind() (via sock->ops->bind), where the test
> 'if (!sk->sk_bound_dev_if)' failed.
>
> Setting sock->sk->sk_bound_dev_if on the socket before calling
> inet6_bind() resolves the issue.
>
> Fixes: d33288172e72 ("ipvs: add more mcast parameters for the sync daemon")
> Signed-off-by: Quentin Armitage <quentin@xxxxxxxxxxxxxxx>
Looks good to me, thanks!
Acked-by: Julian Anastasov <ja@xxxxxx>
Simon, please apply to ipvs tree. Patch compiles
also on stable 4.4.13, 4.5.7 and 4.6.2, so no need for
special versions. The ack is also for the other 3 patches
from v4 (for ipvs-next) but they depend on this patch.
> ---
> net/netfilter/ipvs/ip_vs_sync.c | 6 ++++--
> 1 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
> index 803001a..1b07578 100644
> --- a/net/netfilter/ipvs/ip_vs_sync.c
> +++ b/net/netfilter/ipvs/ip_vs_sync.c
> @@ -1545,7 +1545,8 @@ error:
> /*
> * Set up receiving multicast socket over UDP
> */
> -static struct socket *make_receive_sock(struct netns_ipvs *ipvs, int id)
> +static struct socket *make_receive_sock(struct netns_ipvs *ipvs, int id,
> + int ifindex)
> {
> /* multicast addr */
> union ipvs_sockaddr mcast_addr;
> @@ -1566,6 +1567,7 @@ static struct socket *make_receive_sock(struct
> netns_ipvs *ipvs, int id)
> set_sock_size(sock->sk, 0, result);
>
> get_mcast_sockaddr(&mcast_addr, &salen, &ipvs->bcfg, id);
> + sock->sk->sk_bound_dev_if = ifindex;
> result = sock->ops->bind(sock, (struct sockaddr *)&mcast_addr, salen);
> if (result < 0) {
> pr_err("Error binding to the multicast addr\n");
> @@ -1868,7 +1870,7 @@ int start_sync_thread(struct netns_ipvs *ipvs, struct
> ipvs_sync_daemon_cfg *c,
> if (state == IP_VS_STATE_MASTER)
> sock = make_send_sock(ipvs, id);
> else
> - sock = make_receive_sock(ipvs, id);
> + sock = make_receive_sock(ipvs, id, dev->ifindex);
> if (IS_ERR(sock)) {
> result = PTR_ERR(sock);
> goto outtinfo;
> --
> 1.7.7.6
Regards
--
Julian Anastasov <ja@xxxxxx>
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