On Thu, Sep 14, 2023 at 3:43 PM Mark Michelson <[email protected]> wrote:
>
> Thanks for the fix, Numan.
>
> Acked-by: Mark Michelson <[email protected]>

Thanks.  I applied this patch to main and branch-23.09.

One test case was failing due to the latest changes.  I fixed that and applied.

----------------------------------------------------------------
diff --git a/tests/ovn-northd.at b/tests/ovn-northd.at
index 7ebb115dc2..ef44e10c34 100644
--- a/tests/ovn-northd.at
+++ b/tests/ovn-northd.at
@@ -10069,7 +10069,7 @@ ovn-nbctl dhcp-options-set-options $CIDR_UUID
 lease_time=3600  router=192.168.

 check as northd ovn-appctl -t NORTHD_TYPE inc-engine/clear-stats
 ovn-nbctl --wait=sb lsp-set-dhcpv4-options lsp0-2 $CIDR_UUID
-check_recompute_counter 0 0
+check_recompute_counter 0 0 0

 CHECK_NO_CHANGE_AFTER_RECOMPUTE

@@ -10080,7 +10080,7 @@ options="\"server_id\"=\"00:00:00:10:00:01\"")"

 check as northd ovn-appctl -t NORTHD_TYPE inc-engine/clear-stats
 ovn-nbctl --wait=sb lsp-set-dhcpv6-options lsp0-2 ${d1}
-check_recompute_counter 0 0
+check_recompute_counter 0 0 0

 CHECK_NO_CHANGE_AFTER_RECOMPUTE

----------------------------------------------------------------

Thanks
Numan

>
> On 9/14/23 09:51, [email protected] wrote:
> > From: Numan Siddique <[email protected]>
> >
> > The flows to allow DHCP response from ovn-controller were missing
> > if a logical VIF port had dhcp v4/v6 options set and were handled
> > incrementally.
> >
> > Fixes: 8bbd67891f68 ("northd: Incremental processing of VIF additions in 
> > 'lflow' node.")
> > Signed-off-by: Numan Siddique <[email protected]>
> > ---
> >   northd/northd.c     | 122 ++++++++++++++++++++++----------------------
> >   tests/ovn-northd.at |  25 +++++++++
> >   2 files changed, 85 insertions(+), 62 deletions(-)
> >
> > diff --git a/northd/northd.c b/northd/northd.c
> > index e9cb906e2a..8b0975b91c 100644
> > --- a/northd/northd.c
> > +++ b/northd/northd.c
> > @@ -7756,68 +7756,6 @@ build_acls(struct ovn_datapath *od, const struct 
> > chassis_features *features,
> >           }
> >       }
> >
> > -    /* Add 34000 priority flow to allow DHCP reply from ovn-controller to 
> > all
> > -     * logical ports of the datapath if the CMS has configured DHCPv4 
> > options.
> > -     * */
> > -    for (size_t i = 0; i < od->nbs->n_ports; i++) {
> > -        if (lsp_is_external(od->nbs->ports[i])) {
> > -            continue;
> > -        }
> > -
> > -        if (od->nbs->ports[i]->dhcpv4_options) {
> > -            const char *server_id = smap_get(
> > -                &od->nbs->ports[i]->dhcpv4_options->options, "server_id");
> > -            const char *server_mac = smap_get(
> > -                &od->nbs->ports[i]->dhcpv4_options->options, "server_mac");
> > -            const char *lease_time = smap_get(
> > -                &od->nbs->ports[i]->dhcpv4_options->options, "lease_time");
> > -            if (server_id && server_mac && lease_time) {
> > -                const char *dhcp_actions =
> > -                    has_stateful ? REGBIT_ACL_VERDICT_ALLOW" = 1; "
> > -                                   "ct_commit; next;"
> > -                                 : REGBIT_ACL_VERDICT_ALLOW" = 1; next;";
> > -                ds_clear(&match);
> > -                ds_put_format(&match, "outport == \"%s\" && eth.src == %s "
> > -                              "&& ip4.src == %s && udp && udp.src == 67 "
> > -                              "&& udp.dst == 68", od->nbs->ports[i]->name,
> > -                              server_mac, server_id);
> > -                ovn_lflow_add_with_lport_and_hint(
> > -                    lflows, od, S_SWITCH_OUT_ACL_EVAL, 34000, 
> > ds_cstr(&match),
> > -                    dhcp_actions, od->nbs->ports[i]->name,
> > -                    &od->nbs->ports[i]->dhcpv4_options->header_);
> > -            }
> > -        }
> > -
> > -        if (od->nbs->ports[i]->dhcpv6_options) {
> > -            const char *server_mac = smap_get(
> > -                &od->nbs->ports[i]->dhcpv6_options->options, "server_id");
> > -            struct eth_addr ea;
> > -            if (server_mac && eth_addr_from_string(server_mac, &ea)) {
> > -                /* Get the link local IP of the DHCPv6 server from the
> > -                 * server MAC. */
> > -                struct in6_addr lla;
> > -                in6_generate_lla(ea, &lla);
> > -
> > -                char server_ip[INET6_ADDRSTRLEN + 1];
> > -                ipv6_string_mapped(server_ip, &lla);
> > -
> > -                const char *dhcp6_actions =
> > -                    has_stateful ? REGBIT_ACL_VERDICT_ALLOW" = 1; "
> > -                                   "ct_commit; next;"
> > -                                 : REGBIT_ACL_VERDICT_ALLOW" = 1; next;";
> > -                ds_clear(&match);
> > -                ds_put_format(&match, "outport == \"%s\" && eth.src == %s "
> > -                              "&& ip6.src == %s && udp && udp.src == 547 "
> > -                              "&& udp.dst == 546", od->nbs->ports[i]->name,
> > -                              server_mac, server_ip);
> > -                ovn_lflow_add_with_lport_and_hint(
> > -                    lflows, od, S_SWITCH_OUT_ACL_EVAL, 34000, 
> > ds_cstr(&match),
> > -                    dhcp6_actions, od->nbs->ports[i]->name,
> > -                    &od->nbs->ports[i]->dhcpv6_options->header_);
> > -            }
> > -        }
> > -    }
> > -
> >       /* Add a 34000 priority flow to advance the DNS reply from 
> > ovn-controller,
> >        * if the CMS has configured DNS records for the datapath.
> >        */
> > @@ -9114,6 +9052,33 @@ build_dhcpv4_options_flows(struct ovn_port *op,
> >               ds_destroy(&options_action);
> >               ds_destroy(&response_action);
> >               ds_destroy(&ipv4_addr_match);
> > +
> > +            /* Add 34000 priority flow to allow DHCP reply from 
> > ovn-controller
> > +             * to the ogical port of the datapath if the CMS has configured
> > +             * DHCPv4 options.
> > +             * */
> > +            if (!is_external) {
> > +                const char *server_id = smap_get(
> > +                    &op->nbsp->dhcpv4_options->options, "server_id");
> > +                const char *server_mac = smap_get(
> > +                    &op->nbsp->dhcpv4_options->options, "server_mac");
> > +                const char *lease_time = smap_get(
> > +                    &op->nbsp->dhcpv4_options->options, "lease_time");
> > +                ovs_assert(server_id && server_mac && lease_time);
> > +                const char *dhcp_actions =
> > +                    (op->od->has_stateful_acl || op->od->has_lb_vip)
> > +                     ? REGBIT_ACL_VERDICT_ALLOW" = 1; ct_commit; next;"
> > +                     : REGBIT_ACL_VERDICT_ALLOW" = 1; next;";
> > +                ds_clear(&match);
> > +                ds_put_format(&match, "outport == %s && eth.src == %s "
> > +                              "&& ip4.src == %s && udp && udp.src == 67 "
> > +                              "&& udp.dst == 68",op->json_key,
> > +                              server_mac, server_id);
> > +                ovn_lflow_add_with_lport_and_hint(
> > +                    lflows, op->od, S_SWITCH_OUT_ACL_EVAL, 34000,
> > +                    ds_cstr(&match),dhcp_actions, op->key,
> > +                    &op->nbsp->dhcpv4_options->header_);
> > +            }
> >               break;
> >           }
> >       }
> > @@ -9166,6 +9131,39 @@ build_dhcpv6_options_flows(struct ovn_port *op,
> >                   &op->nbsp->dhcpv6_options->header_);
> >               ds_destroy(&options_action);
> >               ds_destroy(&response_action);
> > +
> > +            /* Add 34000 priority flow to allow DHCP reply from 
> > ovn-controller
> > +             * to the ogical port of the datapath if the CMS has configured
> > +             * DHCPv6 options.
> > +             * */
> > +            if (!is_external) {
> > +                const char *server_mac = smap_get(
> > +                    &op->nbsp->dhcpv6_options->options, "server_id");
> > +                struct eth_addr ea;
> > +                ovs_assert(server_mac &&
> > +                           eth_addr_from_string(server_mac, &ea));
> > +                /* Get the link local IP of the DHCPv6 server from the
> > +                * server MAC. */
> > +                struct in6_addr lla;
> > +                in6_generate_lla(ea, &lla);
> > +
> > +                char server_ip[INET6_ADDRSTRLEN + 1];
> > +                ipv6_string_mapped(server_ip, &lla);
> > +
> > +                const char *dhcp6_actions =
> > +                    (op->od->has_stateful_acl || op->od->has_lb_vip)
> > +                        ? REGBIT_ACL_VERDICT_ALLOW" = 1; ct_commit; next;"
> > +                        : REGBIT_ACL_VERDICT_ALLOW" = 1; next;";
> > +                ds_clear(&match);
> > +                ds_put_format(&match, "outport == %s && eth.src == %s "
> > +                              "&& ip6.src == %s && udp && udp.src == 547 "
> > +                              "&& udp.dst == 546", op->json_key,
> > +                              server_mac, server_ip);
> > +                ovn_lflow_add_with_lport_and_hint(
> > +                    lflows, op->od, S_SWITCH_OUT_ACL_EVAL, 34000,
> > +                    ds_cstr(&match),dhcp6_actions, op->key,
> > +                    &op->nbsp->dhcpv6_options->header_);
> > +            }
> >               break;
> >           }
> >       }
> > diff --git a/tests/ovn-northd.at b/tests/ovn-northd.at
> > index 5c9da811fa..689f70ebb9 100644
> > --- a/tests/ovn-northd.at
> > +++ b/tests/ovn-northd.at
> > @@ -10046,6 +10046,31 @@ check_recompute_counter 0 0
> >
> >   CHECK_NO_CHANGE_AFTER_RECOMPUTE
> >
> > +# Associate DHCP for lsp0-2
> > +ovn-nbctl dhcp-options-create 192.168.0.0/24
> > +
> > +CIDR_UUID=$(ovn-nbctl --bare --columns=_uuid find dhcp_options 
> > cidr="192.168.0.0/24")
> > +ovn-nbctl dhcp-options-set-options $CIDR_UUID   lease_time=3600  
> > router=192.168.0.1   server_id=192.168.0.1   server_mac=c0:ff:ee:00:00:01 
> > hostname="\"foo\""
> > +
> > +check as northd ovn-appctl -t NORTHD_TYPE inc-engine/clear-stats
> > +ovn-nbctl --wait=sb lsp-set-dhcpv4-options lsp0-2 $CIDR_UUID
> > +check_recompute_counter 0 0
> > +
> > +CHECK_NO_CHANGE_AFTER_RECOMPUTE
> > +
> > +# Add IPv6 address and associate DHCPv6 for lsp0-2
> > +check ovn-nbctl lsp-set-addresses lsp0-2 "aa:aa:aa:00:00:01 192.168.0.11 
> > aef0::4"
> > +d1="$(ovn-nbctl create DHCP_Options cidr="aef0\:\:/64" \
> > +options="\"server_id\"=\"00:00:00:10:00:01\"")"
> > +
> > +check as northd ovn-appctl -t NORTHD_TYPE inc-engine/clear-stats
> > +ovn-nbctl --wait=sb lsp-set-dhcpv6-options lsp0-2 ${d1}
> > +check_recompute_counter 0 0
> > +
> > +CHECK_NO_CHANGE_AFTER_RECOMPUTE
> > +
> > +check ovn-nbctl --wait=hv ls-del ls0
> > +
> >   OVN_CLEANUP([hv1])
> >   AT_CLEANUP
> >   ])
>
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