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Merge pull request #15285 from idryzhov/staticd-nexthop-refcounter

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staticd: fix nexthop tracking memory leak and add a topotest for VRFs
This commit is contained in:
Donald Sharp 2024-02-08 15:53:30 -05:00 committed by GitHub
parent afa07a7f3a 763ce7bb37
commit c70af155d2
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GPG key ID: B5690EEEBB952194
6 changed files with 175 additions and 69 deletions
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34
staticd/static_nht.c
View file

@ -18,8 +18,7 @@
#include "static_nht.h"
static void static_nht_update_path(struct static_path *pn, struct prefix *nhp,
uint32_t nh_num, vrf_id_t nh_vrf_id,
struct vrf *vrf)
uint32_t nh_num, vrf_id_t nh_vrf_id)
{
struct static_nexthop *nh;
@ -49,18 +48,13 @@ static void static_nht_update_path(struct static_path *pn, struct prefix *nhp,
static void static_nht_update_safi(struct prefix *sp, struct prefix *nhp,
uint32_t nh_num, afi_t afi, safi_t safi,
struct vrf *vrf, vrf_id_t nh_vrf_id)
struct static_vrf *svrf, vrf_id_t nh_vrf_id)
{
struct route_table *stable;
struct static_vrf *svrf;
struct route_node *rn;
struct static_path *pn;
struct static_route_info *si;
svrf = vrf->info;
if (!svrf)
return;
stable = static_vrf_static_table(afi, safi, svrf);
if (!stable)
return;
@ -71,7 +65,7 @@ static void static_nht_update_safi(struct prefix *sp, struct prefix *nhp,
si = static_route_info_from_rnode(rn);
frr_each(static_path_list, &si->path_list, pn) {
static_nht_update_path(pn, nhp, nh_num,
nh_vrf_id, vrf);
nh_vrf_id);
}
route_unlock_node(rn);
}
@ -83,7 +77,7 @@ static void static_nht_update_safi(struct prefix *sp, struct prefix *nhp,
if (!si)
continue;
frr_each(static_path_list, &si->path_list, pn) {
static_nht_update_path(pn, nhp, nh_num, nh_vrf_id, vrf);
static_nht_update_path(pn, nhp, nh_num, nh_vrf_id);
}
}
}
@ -91,29 +85,23 @@ static void static_nht_update_safi(struct prefix *sp, struct prefix *nhp,
void static_nht_update(struct prefix *sp, struct prefix *nhp, uint32_t nh_num,
afi_t afi, safi_t safi, vrf_id_t nh_vrf_id)
{
struct static_vrf *svrf;
struct vrf *vrf;
RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name)
static_nht_update_safi(sp, nhp, nh_num, afi, safi, vrf,
RB_FOREACH (svrf, svrf_name_head, &svrfs)
static_nht_update_safi(sp, nhp, nh_num, afi, safi, svrf,
nh_vrf_id);
}
static void static_nht_reset_start_safi(struct prefix *nhp, afi_t afi,
safi_t safi, struct vrf *vrf,
safi_t safi, struct static_vrf *svrf,
vrf_id_t nh_vrf_id)
{
struct static_vrf *svrf;
struct route_table *stable;
struct static_nexthop *nh;
struct static_path *pn;
struct route_node *rn;
struct static_route_info *si;
svrf = vrf->info;
if (!svrf)
return;
stable = static_vrf_static_table(afi, safi, svrf);
if (!stable)
return;
@ -153,10 +141,10 @@ static void static_nht_reset_start_safi(struct prefix *nhp, afi_t afi,
void static_nht_reset_start(struct prefix *nhp, afi_t afi, safi_t safi,
vrf_id_t nh_vrf_id)
{
struct vrf *vrf;
struct static_vrf *svrf;
RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name)
static_nht_reset_start_safi(nhp, afi, safi, vrf, nh_vrf_id);
RB_FOREACH (svrf, svrf_name_head, &svrfs)
static_nht_reset_start_safi(nhp, afi, safi, svrf, nh_vrf_id);
}
static void static_nht_mark_state_safi(struct prefix *sp, afi_t afi,

63
staticd/static_routes.c
View file

@ -87,11 +87,6 @@ void zebra_stable_node_cleanup(struct route_table *table,
/* Install static path into rib. */
void static_install_path(struct static_path *pn)
{
struct static_nexthop *nh;
frr_each(static_nexthop_list, &pn->nexthop_list, nh)
static_zebra_nht_register(nh, true);
if (static_nexthop_list_count(&pn->nexthop_list))
static_zebra_route_add(pn, true);
}
@ -377,6 +372,17 @@ void static_install_nexthop(struct static_nexthop *nh)
}
}
void static_uninstall_nexthop(struct static_nexthop *nh)
{
struct static_path *pn = nh->pn;
if (nh->nh_vrf_id == VRF_UNKNOWN)
return;
static_zebra_nht_register(nh, false);
static_uninstall_path(pn);
}
void static_delete_nexthop(struct static_nexthop *nh)
{
struct static_path *pn = nh->pn;
@ -386,17 +392,8 @@ void static_delete_nexthop(struct static_nexthop *nh)
/* Remove BFD session/configuration if any. */
bfd_sess_free(&nh->bsp);
if (nh->nh_vrf_id == VRF_UNKNOWN)
goto EXIT;
static_uninstall_nexthop(nh);
static_zebra_nht_register(nh, false);
/*
* If we have other si nodes then route replace
* else delete the route
*/
static_uninstall_path(pn);
EXIT:
route_unlock_node(rn);
/* Free static route configuration. */
XFREE(MTYPE_STATIC_NEXTHOP, nh);
@ -490,7 +487,6 @@ static void static_fixup_vrf(struct vrf *vrf, struct route_table *stable,
continue;
nh->nh_vrf_id = vrf->vrf_id;
nh->nh_registered = false;
if (nh->ifname[0]) {
ifp = if_lookup_by_name(nh->ifname,
nh->nh_vrf_id);
@ -500,7 +496,7 @@ static void static_fixup_vrf(struct vrf *vrf, struct route_table *stable,
continue;
}
static_install_path(pn);
static_install_nexthop(nh);
}
}
}
@ -518,8 +514,6 @@ static void static_fixup_vrf(struct vrf *vrf, struct route_table *stable,
static void static_enable_vrf(struct route_table *stable, afi_t afi, safi_t safi)
{
struct route_node *rn;
struct static_nexthop *nh;
struct interface *ifp;
struct static_path *pn;
struct static_route_info *si;
@ -527,22 +521,8 @@ static void static_enable_vrf(struct route_table *stable, afi_t afi, safi_t safi
si = static_route_info_from_rnode(rn);
if (!si)
continue;
frr_each(static_path_list, &si->path_list, pn) {
frr_each(static_nexthop_list, &pn->nexthop_list, nh) {
if (nh->nh_vrf_id == VRF_UNKNOWN)
continue;
if (nh->ifname[0]) {
ifp = if_lookup_by_name(nh->ifname,
nh->nh_vrf_id);
if (ifp)
nh->ifindex = ifp->ifindex;
else
continue;
}
static_install_path(pn);
}
}
frr_each(static_path_list, &si->path_list, pn)
static_install_path(pn);
}
}
@ -604,7 +584,7 @@ static void static_cleanup_vrf(struct vrf *vrf, struct route_table *stable,
if (strcmp(vrf->name, nh->nh_vrfname) != 0)
continue;
static_uninstall_path(pn);
static_uninstall_nexthop(nh);
nh->nh_vrf_id = VRF_UNKNOWN;
nh->ifindex = IFINDEX_INTERNAL;
@ -625,7 +605,6 @@ static void static_disable_vrf(struct route_table *stable,
afi_t afi, safi_t safi)
{
struct route_node *rn;
struct static_nexthop *nh;
struct static_path *pn;
struct static_route_info *si;
@ -633,14 +612,8 @@ static void static_disable_vrf(struct route_table *stable,
si = static_route_info_from_rnode(rn);
if (!si)
continue;
frr_each(static_path_list, &si->path_list, pn) {
frr_each(static_nexthop_list, &pn->nexthop_list, nh) {
if (nh->nh_vrf_id == VRF_UNKNOWN)
continue;
static_uninstall_path(pn);
}
}
frr_each(static_path_list, &si->path_list, pn)
static_uninstall_path(pn);
}
}

1
staticd/static_routes.h
View file

@ -207,6 +207,7 @@ static_add_nexthop(struct static_path *pn, enum static_nh_type type,
struct ipaddr *ipaddr, const char *ifname,
const char *nh_vrf, uint32_t color);
extern void static_install_nexthop(struct static_nexthop *nh);
extern void static_uninstall_nexthop(struct static_nexthop *nh);
extern void static_delete_nexthop(struct static_nexthop *nh);

2
staticd/static_zebra.c
View file

@ -390,7 +390,7 @@ extern void static_zebra_route_add(struct static_path *pn, bool install)
struct zapi_route api;
uint32_t nh_num = 0;
if (!si->svrf->vrf)
if (!si->svrf->vrf || si->svrf->vrf->vrf_id == VRF_UNKNOWN)
return;
p = src_pp = NULL;

18
tests/topotests/static_vrf/r1/frr.conf Normal file
View file

@ -0,0 +1,18 @@
interface r1-eth0 vrf red
ip address 192.0.2.1/23
exit
interface r1-eth1 vrf blue
ip address 192.0.2.129/24
exit
ip route 198.51.100.1/32 192.0.2.2 nexthop-vrf red
ip route 198.51.100.1/32 192.0.2.130 nexthop-vrf blue
ip route 198.51.100.2/32 r1-eth0 nexthop-vrf red
ip route 198.51.100.2/32 r1-eth1 nexthop-vrf blue
ip route 203.0.113.1/32 192.0.2.130 vrf red nexthop-vrf blue
ip route 203.0.113.2/32 r1-eth1 vrf red nexthop-vrf blue
ip route 203.0.113.129/32 192.0.2.2 vrf blue nexthop-vrf red
ip route 203.0.113.130/32 r1-eth0 vrf blue nexthop-vrf red

126
tests/topotests/static_vrf/test_static_vrf.py Normal file
View file

@ -0,0 +1,126 @@
#!/usr/bin/env python
# -*- coding: utf-8 eval: (blacken-mode 1) -*-
# SPDX-License-Identifier: ISC
#
# Copyright (c) 2024 NFWare Inc.
#
# noqa: E501
#
"""
Test static route functionality
"""
import ipaddress
import pytest
from lib.topogen import Topogen
from lib.common_config import retry
pytestmark = [pytest.mark.staticd, pytest.mark.mgmtd]
@pytest.fixture(scope="module")
def tgen(request):
"Setup/Teardown the environment and provide tgen argument to tests"
topodef = {"s1": ("r1",), "s2": ("r1",)}
tgen = Topogen(topodef, request.module.__name__)
tgen.start_topology()
router_list = tgen.routers()
for rname, router in router_list.items():
# Setup VRF red
router.net.add_l3vrf("red", 10)
router.net.attach_iface_to_l3vrf(rname + "-eth0", "red")
# Setup VRF blue
router.net.add_l3vrf("blue", 20)
router.net.attach_iface_to_l3vrf(rname + "-eth1", "blue")
# Load configuration
router.load_frr_config("frr.conf")
tgen.start_router()
yield tgen
tgen.stop_topology()
@retry(retry_timeout=1, initial_wait=0.1)
def check_kernel(r1, prefix, nexthops, vrf, expected_p=True, expected_nh=True):
vrfstr = f" vrf {vrf}" if vrf else ""
net = ipaddress.ip_network(prefix)
if net.version == 6:
kernel = r1.run(f"ip -6 route show{vrfstr} {prefix}")
else:
kernel = r1.run(f"ip -4 route show{vrfstr} {prefix}")
if expected_p:
assert prefix in kernel, f"Failed to find \n'{prefix}'\n in \n'{kernel:.1920}'"
else:
assert (
prefix not in kernel
), f"Failed found \n'{prefix}'\n in \n'{kernel:.1920}'"
if not expected_p:
return
for nh in nexthops:
if expected_nh:
assert f"{nh}" in kernel, f"Failed to find \n'{nh}'\n in \n'{kernel:.1920}'"
else:
assert (
f"{nh}" not in kernel
), f"Failed found \n'{nh}'\n in \n'{kernel:.1920}'"
def test_static_vrf(tgen):
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
r1 = tgen.gears["r1"]
# Check initial configuration
check_kernel(r1, "198.51.100.1", ["192.0.2.2", "192.0.2.130"], None)
check_kernel(r1, "198.51.100.2", ["r1-eth0", "r1-eth1"], None)
check_kernel(r1, "203.0.113.1", ["192.0.2.130"], "red")
check_kernel(r1, "203.0.113.2", ["r1-eth1"], "red")
check_kernel(r1, "203.0.113.129", ["192.0.2.2"], "blue")
check_kernel(r1, "203.0.113.130", ["r1-eth0"], "blue")
# Delete VRF red
r1.net.del_iface("red")
# Check that "red" nexthops are removed, "blue" nexthops are still there
check_kernel(r1, "198.51.100.1", ["192.0.2.2"], None, expected_nh=False)
check_kernel(r1, "198.51.100.1", ["192.0.2.130"], None)
check_kernel(r1, "198.51.100.2", ["r1-eth0"], None, expected_nh=False)
check_kernel(r1, "198.51.100.2", ["r1-eth1"], None)
check_kernel(r1, "203.0.113.129", ["192.0.2.2"], "blue", expected_p=False)
check_kernel(r1, "203.0.113.130", ["r1-eth0"], "blue", expected_p=False)
# Delete VRF blue
r1.net.del_iface("blue")
# Check that "blue" nexthops are removed
check_kernel(r1, "198.51.100.1", ["192.0.2.130"], None, expected_p=False)
check_kernel(r1, "198.51.100.2", ["r1-eth1"], None, expected_p=False)
# Add VRF red back, attach "eth0" to it
r1.net.add_l3vrf("red", 10)
r1.net.attach_iface_to_l3vrf("r1-eth0", "red")
# Check that "red" nexthops are restored
check_kernel(r1, "198.51.100.1", ["192.0.2.2"], None)
check_kernel(r1, "198.51.100.2", ["r1-eth0"], None)
# Add VRF blue back, attach "eth1" to it
r1.net.add_l3vrf("blue", 20)
r1.net.attach_iface_to_l3vrf("r1-eth1", "blue")
# Check that everything is restored
check_kernel(r1, "198.51.100.1", ["192.0.2.2", "192.0.2.130"], None)
check_kernel(r1, "198.51.100.2", ["r1-eth0", "r1-eth1"], None)
check_kernel(r1, "203.0.113.1", ["192.0.2.130"], "red")
check_kernel(r1, "203.0.113.2", ["r1-eth1"], "red")
check_kernel(r1, "203.0.113.129", ["192.0.2.2"], "blue")
check_kernel(r1, "203.0.113.130", ["r1-eth0"], "blue")