[ovs-dev] [PATCH ovn] Add RDNSS support to OVN

Lorenzo Bianconi lorenzo.bianconi at redhat.com
Wed Oct 23 08:52:49 UTC 2019


> On Sat, Oct 19, 2019 at 12:08 AM Mark Michelson <mmichels at redhat.com> wrote:
> 
> > Acked-by: Mark Michelson <mmichels at redhat.com>
> >
> > On 10/18/19 7:09 AM, Lorenzo Bianconi wrote:
> > > Introduce the possibility to specify a RDNSS option to Router
> > > Advertisement packets. DNS IPv6 address can be specified using
> > > 'rdnss' tag in the ipv6_ra_configs column of logical router
> > > port table
> > >
> > > Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi at redhat.com>
> >
> 
> Hi Lorenzo,

Hi Numan,

> 
> This patch is failing compilation when --enable-Werror and --enable-sparse
> is configured.
> 
> Can you please take a look.
> 
> 
> ../controller/pinctrl.c:2394:45: error: incorrect type in argument 3
> (different base types)
> ../controller/pinctrl.c:2394:45:    expected restricted ovs_be32 [usertype]
> lifetime
> ../controller/pinctrl.c:2394:45:    got unsigned int
> make[1]: *** [Makefile:2226: controller/pinctrl.o] Error 1
> make[1]: *** Waiting for unfinished jobs....


ack, I will fix in v2. Thx.

Regards,
Lorenzo

> 
> 
> Thanks
> Numan
> 
> 
> > > ---
> > >   controller/pinctrl.c | 50 ++++++++++++++++++++++++++++++++++++++++++++
> > >   northd/ovn-northd.c  |  5 +++++
> > >   ovn-nb.xml           |  4 ++++
> > >   tests/ovn.at         | 27 +++++++++++++++++-------
> > >   4 files changed, 78 insertions(+), 8 deletions(-)
> > >
> > > diff --git a/controller/pinctrl.c b/controller/pinctrl.c
> > > index d826da186..5bc4b35e7 100644
> > > --- a/controller/pinctrl.c
> > > +++ b/controller/pinctrl.c
> > > @@ -2192,6 +2192,8 @@ struct ipv6_ra_config {
> > >       uint8_t mo_flags; /* Managed/Other flags for RAs */
> > >       uint8_t la_flags; /* On-link/autonomous flags for address prefixes
> > */
> > >       struct lport_addresses prefixes;
> > > +    struct in6_addr rdnss;
> > > +    bool has_rdnss;
> > >   };
> > >
> > >   struct ipv6_ra_state {
> > > @@ -2202,6 +2204,16 @@ struct ipv6_ra_state {
> > >       bool delete_me;
> > >   };
> > >
> > > +#define ND_RDNSS_OPT_LEN    8
> > > +#define ND_OPT_RDNSS        25
> > > +struct nd_rdnss_opt {
> > > +    uint8_t type;         /* ND_OPT_RDNSS. */
> > > +    uint8_t len;          /* >= 3. */
> > > +    ovs_be16 reserved;    /* Always 0. */
> > > +    ovs_be32 lifetime;
> > > +    const ovs_be128 dns[0];
> > > +};
> > > +
> > >   static void
> > >   init_ipv6_ras(void)
> > >   {
> > > @@ -2289,6 +2301,12 @@ ipv6_ra_update_config(const struct
> > sbrec_port_binding *pb)
> > >           VLOG_WARN("Invalid IP source %s", ip_addr);
> > >           goto fail;
> > >       }
> > > +    const char *rdnss = smap_get(&pb->options, "ipv6_ra_rdnss");
> > > +    if (rdnss && !ipv6_parse(rdnss, &config->rdnss)) {
> > > +        VLOG_WARN("Invalid RDNSS source %s", rdnss);
> > > +        goto fail;
> > > +    }
> > > +    config->has_rdnss = !!rdnss;
> > >
> > >       return config;
> > >
> > > @@ -2319,6 +2337,35 @@ put_load(uint64_t value, enum mf_field_id dst,
> > int ofs, int n_bits,
> > >       bitwise_one(ofpact_set_field_mask(sf), sf->field->n_bytes, ofs,
> > n_bits);
> > >   }
> > >
> > > +static void
> > > +packet_put_ra_rdnss_opt(struct dp_packet *b, uint8_t num,
> > > +                        ovs_be32 lifetime, const struct in6_addr *dns)
> > > +{
> > > +    size_t prev_l4_size = dp_packet_l4_size(b);
> > > +    struct ip6_hdr *nh = dp_packet_l3(b);
> > > +    size_t len = 2 * num + 1;
> > > +    size_t size = len * 8;
> > > +
> > > +    nh->ip6_plen = htons(prev_l4_size + len * 8);
> > > +
> > > +    struct nd_rdnss_opt *nd_rdnss = dp_packet_put_uninit(b, size);
> > > +    nd_rdnss->type = ND_OPT_RDNSS;
> > > +    nd_rdnss->len = len;
> > > +    nd_rdnss->reserved = 0;
> > > +    nd_rdnss->lifetime = lifetime;
> > > +
> > > +    ovs_be128 *addr = (ovs_be128 *)(nd_rdnss + 1);
> > > +    for (int i = 0; i < num; i++) {
> > > +        memcpy(addr + i, dns, sizeof(ovs_be32[4]));
> > > +    }
> > > +
> > > +    struct ovs_ra_msg *ra = dp_packet_l4(b);
> > > +    ra->icmph.icmp6_cksum = 0;
> > > +    uint32_t icmp_csum = packet_csum_pseudoheader6(dp_packet_l3(b));
> > > +    ra->icmph.icmp6_cksum = csum_finish(csum_continue(icmp_csum, ra,
> > > +                                                      prev_l4_size +
> > size));
> > > +}
> > > +
> > >   /* Called with in the pinctrl_handler thread context. */
> > >   static long long int
> > >   ipv6_ra_send(struct rconn *swconn, struct ipv6_ra_state *ra)
> > > @@ -2343,6 +2390,9 @@ ipv6_ra_send(struct rconn *swconn, struct
> > ipv6_ra_state *ra)
> > >               ra->config->la_flags,
> > htonl(IPV6_ND_RA_OPT_PREFIX_VALID_LIFETIME),
> > >               htonl(IPV6_ND_RA_OPT_PREFIX_PREFERRED_LIFETIME), addr);
> > >       }
> > > +    if (ra->config->has_rdnss) {
> > > +        packet_put_ra_rdnss_opt(&packet, 1, 0xffffffff,
> > &ra->config->rdnss);
> > > +    }
> > >
> > >       uint64_t ofpacts_stub[4096 / 8];
> > >       struct ofpbuf ofpacts = OFPBUF_STUB_INITIALIZER(ofpacts_stub);
> > > diff --git a/northd/ovn-northd.c b/northd/ovn-northd.c
> > > index ea8ad7c2d..d1de36e08 100644
> > > --- a/northd/ovn-northd.c
> > > +++ b/northd/ovn-northd.c
> > > @@ -6485,6 +6485,11 @@ copy_ra_to_sb(struct ovn_port *op, const char
> > *address_mode)
> > >       smap_add(&options, "ipv6_ra_prefixes", ds_cstr(&s));
> > >       ds_destroy(&s);
> > >
> > > +    const char *rdnss = smap_get(&op->nbrp->ipv6_ra_configs, "rdnss");
> > > +    if (rdnss) {
> > > +        smap_add(&options, "ipv6_ra_rdnss", rdnss);
> > > +    }
> > > +
> > >       smap_add(&options, "ipv6_ra_src_eth", op->lrp_networks.ea_s);
> > >
> > >       sbrec_port_binding_set_options(op->sb, &options);
> > > diff --git a/ovn-nb.xml b/ovn-nb.xml
> > > index 1504f8fca..f1f9b969e 100644
> > > --- a/ovn-nb.xml
> > > +++ b/ovn-nb.xml
> > > @@ -1885,6 +1885,10 @@
> > >           is one-third of <ref column="ipv6_ra_configs"
> > key="max_interval"/>,
> > >           i.e. 200 seconds if that key is unset.
> > >         </column>
> > > +
> > > +      <column name="ipv6_ra_configs" key="rdnss">
> > > +        IPv6 address of RDNSS server announced in RA packets
> > > +      </column>
> > >       </group>
> > >
> > >       <group title="Options">
> > > diff --git a/tests/ovn.at b/tests/ovn.at
> > > index 6bdb9e8ed..80d38ea4c 100644
> > > --- a/tests/ovn.at
> > > +++ b/tests/ovn.at
> > > @@ -12537,14 +12537,15 @@ construct_expected_ra() {
> > >
> > >       local mtu=$1
> > >       local ra_mo=$2
> > > -    local ra_prefix_la=$3
> > > +    local rdnss=$3
> > > +    local ra_prefix_la=$4
> > >
> > >       local slla=0101${src_mac}
> > >       local mtu_opt=""
> > >       if test $mtu != 0; then
> > >           mtu_opt=05010000${mtu}
> > >       fi
> > > -    shift 3
> > > +    shift 4
> > >
> > >       local prefix=""
> > >       while [[ $# -gt 0 ]] ; do
> > > @@ -12554,7 +12555,12 @@ construct_expected_ra() {
> > >           shift 2
> > >       done
> > >
> > > -    local ra=ff${ra_mo}ffff0000000000000000${slla}${mtu_opt}${prefix}
> > > +    local rdnss_opt=""
> > > +    if test $rdnss != 0; then
> > > +        rdnss_opt=19030000ffffffff${rdnss}
> > > +    fi
> > > +
> > > +    local
> > ra=ff${ra_mo}ffff0000000000000000${slla}${mtu_opt}${prefix}${rdnss_opt}
> > >       local icmp=8600XXXX${ra}
> > >
> > >       local ip_len=$(expr ${#icmp} / 2)
> > > @@ -12589,23 +12595,28 @@ ra_test() {
> > >   }
> > >
> > >   # Baseline test with no MTU
> > > -ra_test 0 00 c0 40 aef00000000000000000000000000000
> > > +ra_test 0 00 0 c0 40 aef00000000000000000000000000000
> > >
> > >   # Now make sure an MTU option makes it
> > >   ovn-nbctl --wait=hv set Logical_Router_Port ro-sw
> > ipv6_ra_configs:mtu=1500
> > > -ra_test 000005dc 00 c0 40 aef00000000000000000000000000000
> > > +ra_test 000005dc 00 0 c0 40 aef00000000000000000000000000000
> > >
> > >   # Now test for multiple network prefixes
> > >   ovn-nbctl --wait=hv set Logical_Router_port ro-sw
> > networks='aef0\:\:1/64 fd0f\:\:1/48'
> > > -ra_test 000005dc 00 c0 40 aef00000000000000000000000000000 30
> > fd0f0000000000000000000000000000
> > > +ra_test 000005dc 00 0 c0 40 aef00000000000000000000000000000 30
> > fd0f0000000000000000000000000000
> > > +
> > > +# Now test for RDNSS
> > > +ovn-nbctl --wait=hv set Logical_Router_port ro-sw
> > ipv6_ra_configs:rdnss='aef0::11'
> > > +dns_addr=aef00000000000000000000000000011
> > > +ra_test 000005dc 00 $dns_addr c0 40 aef00000000000000000000000000000 30
> > fd0f0000000000000000000000000000
> > >
> > >   # Test a different address mode now
> > >   ovn-nbctl --wait=hv set Logical_Router_Port ro-sw
> > ipv6_ra_configs:address_mode=dhcpv6_stateful
> > > -ra_test 000005dc 80 80 40 aef00000000000000000000000000000 30
> > fd0f0000000000000000000000000000
> > > +ra_test 000005dc 80 $dns_addr 80 40 aef00000000000000000000000000000 30
> > fd0f0000000000000000000000000000
> > >
> > >   # And the other address mode
> > >   ovn-nbctl --wait=hv set Logical_Router_Port ro-sw
> > ipv6_ra_configs:address_mode=dhcpv6_stateless
> > > -ra_test 000005dc 40 c0 40 aef00000000000000000000000000000 30
> > fd0f0000000000000000000000000000
> > > +ra_test 000005dc 40 $dns_addr c0 40 aef00000000000000000000000000000 30
> > fd0f0000000000000000000000000000
> > >
> > >   OVN_CLEANUP([hv1],[hv2])
> > >   AT_CLEANUP
> > >
> >
> > _______________________________________________
> > dev mailing list
> > dev at openvswitch.org
> > https://mail.openvswitch.org/mailman/listinfo/ovs-dev
> >
> 
> 
> -- 
> numan


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