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|
/*
* Copyright (C) 2016 CumulusNetworks
* Donald Sharp
*
* This file is part of Quagga
*
* Quagga is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* Quagga is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
/* for basename */
#include <libgen.h>
#include "log.h"
#include "linklist.h"
#include "command.h"
#include "memory.h"
#include "srcdest_table.h"
#include "vrf.h"
#include "vty.h"
#include "zebra/zebra_router.h"
#include "zebra/rtadv.h"
#include "zebra/debug.h"
#include "zebra/zapi_msg.h"
#include "zebra/rib.h"
#include "zebra/zebra_vrf.h"
#include "zebra/zebra_rnh.h"
#include "zebra/router-id.h"
#include "zebra/interface.h"
#include "zebra/zebra_mpls.h"
#include "zebra/zebra_vxlan.h"
#include "zebra/zebra_netns_notify.h"
#include "zebra/zebra_routemap.h"
#ifndef VTYSH_EXTRACT_PL
#include "zebra/zebra_vrf_clippy.c"
#endif
#include "zebra/table_manager.h"
static void zebra_vrf_table_create(struct zebra_vrf *zvrf, afi_t afi,
safi_t safi);
static void zebra_rnhtable_node_cleanup(struct route_table *table,
struct route_node *node);
DEFINE_MTYPE_STATIC(ZEBRA, ZEBRA_VRF, "ZEBRA VRF");
DEFINE_MTYPE_STATIC(ZEBRA, OTHER_TABLE, "Other Table");
/* VRF information update. */
static void zebra_vrf_add_update(struct zebra_vrf *zvrf)
{
struct listnode *node, *nnode;
struct zserv *client;
if (IS_ZEBRA_DEBUG_EVENT)
zlog_debug("MESSAGE: ZEBRA_VRF_ADD %s", zvrf_name(zvrf));
for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
/* Do not send unsolicited messages to synchronous clients. */
if (client->synchronous)
continue;
zsend_vrf_add(client, zvrf);
}
}
static void zebra_vrf_delete_update(struct zebra_vrf *zvrf)
{
struct listnode *node, *nnode;
struct zserv *client;
if (IS_ZEBRA_DEBUG_EVENT)
zlog_debug("MESSAGE: ZEBRA_VRF_DELETE %s", zvrf_name(zvrf));
for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
/* Do not send unsolicited messages to synchronous clients. */
if (client->synchronous)
continue;
zsend_vrf_delete(client, zvrf);
}
}
void zebra_vrf_update_all(struct zserv *client)
{
struct vrf *vrf;
RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
if (vrf->vrf_id != VRF_UNKNOWN)
zsend_vrf_add(client, vrf_info_lookup(vrf->vrf_id));
}
}
/* Callback upon creating a new VRF. */
static int zebra_vrf_new(struct vrf *vrf)
{
struct zebra_vrf *zvrf;
if (IS_ZEBRA_DEBUG_EVENT)
zlog_debug("VRF %s created, id %u", vrf->name, vrf->vrf_id);
zvrf = zebra_vrf_alloc(vrf);
if (!vrf_is_backend_netns())
zvrf->zns = zebra_ns_lookup(NS_DEFAULT);
otable_init(&zvrf->other_tables);
router_id_init(zvrf);
/* Initiate Table Manager per ZNS */
table_manager_enable(zvrf);
return 0;
}
/* Callback upon enabling a VRF. */
static int zebra_vrf_enable(struct vrf *vrf)
{
struct zebra_vrf *zvrf = vrf->info;
struct route_table *table;
afi_t afi;
safi_t safi;
assert(zvrf);
if (IS_ZEBRA_DEBUG_EVENT)
zlog_debug("VRF %s id %u is now active", zvrf_name(zvrf),
zvrf_id(zvrf));
if (vrf_is_backend_netns())
zvrf->zns = zebra_ns_lookup((ns_id_t)vrf->vrf_id);
else
zvrf->zns = zebra_ns_lookup(NS_DEFAULT);
rtadv_vrf_init(zvrf);
/* Inform clients that the VRF is now active. This is an
* add for the clients.
*/
zebra_vrf_add_update(zvrf);
/* Allocate tables */
for (afi = AFI_IP; afi <= AFI_IP6; afi++) {
for (safi = SAFI_UNICAST; safi <= SAFI_MULTICAST; safi++)
zebra_vrf_table_create(zvrf, afi, safi);
table = route_table_init();
table->cleanup = zebra_rnhtable_node_cleanup;
zvrf->rnh_table[afi] = table;
table = route_table_init();
table->cleanup = zebra_rnhtable_node_cleanup;
zvrf->rnh_table_multicast[afi] = table;
}
/* Kick off any VxLAN-EVPN processing. */
zebra_vxlan_vrf_enable(zvrf);
return 0;
}
/* Callback upon disabling a VRF. */
static int zebra_vrf_disable(struct vrf *vrf)
{
struct zebra_vrf *zvrf = vrf->info;
struct interface *ifp;
afi_t afi;
safi_t safi;
assert(zvrf);
if (IS_ZEBRA_DEBUG_EVENT)
zlog_debug("VRF %s id %u is now inactive", zvrf_name(zvrf),
zvrf_id(zvrf));
/* Stop any VxLAN-EVPN processing. */
zebra_vxlan_vrf_disable(zvrf);
rtadv_vrf_terminate(zvrf);
/* Inform clients that the VRF is now inactive. This is a
* delete for the clients.
*/
zebra_vrf_delete_update(zvrf);
/* If asked to retain routes, there's nothing more to do. */
if (CHECK_FLAG(zvrf->flags, ZEBRA_VRF_RETAIN))
return 0;
/* Remove all routes. */
for (afi = AFI_IP; afi <= AFI_IP6; afi++) {
route_table_finish(zvrf->rnh_table[afi]);
zvrf->rnh_table[afi] = NULL;
route_table_finish(zvrf->rnh_table_multicast[afi]);
zvrf->rnh_table_multicast[afi] = NULL;
for (safi = SAFI_UNICAST; safi <= SAFI_MULTICAST; safi++)
rib_close_table(zvrf->table[afi][safi]);
}
/* Cleanup Vxlan, MPLS and PW tables. */
zebra_vxlan_cleanup_tables(zvrf);
zebra_mpls_cleanup_tables(zvrf);
zebra_pw_exit(zvrf);
/* Remove link-local IPv4 addresses created for BGP unnumbered peering.
*/
FOR_ALL_INTERFACES (vrf, ifp)
if_nbr_ipv6ll_to_ipv4ll_neigh_del_all(ifp);
/* clean-up work queues */
meta_queue_free(zrouter.mq, zvrf);
/* Cleanup (free) routing tables and NHT tables. */
for (afi = AFI_IP; afi <= AFI_IP6; afi++) {
/*
* Set the table pointer to NULL as that
* we no-longer need a copy of it, nor do we
* own this data, the zebra_router structure
* owns these tables. Once we've cleaned up the
* table, see rib_close_table above
* we no-longer need this pointer.
*/
for (safi = SAFI_UNICAST; safi <= SAFI_MULTICAST; safi++) {
zebra_router_release_table(zvrf, zvrf->table_id, afi,
safi);
zvrf->table[afi][safi] = NULL;
}
}
return 0;
}
static int zebra_vrf_delete(struct vrf *vrf)
{
struct zebra_vrf *zvrf = vrf->info;
struct other_route_table *otable;
assert(zvrf);
if (IS_ZEBRA_DEBUG_EVENT)
zlog_debug("VRF %s id %u deleted", zvrf_name(zvrf),
zvrf_id(zvrf));
table_manager_disable(zvrf);
/* clean-up work queues */
meta_queue_free(zrouter.mq, zvrf);
/* Free Vxlan and MPLS. */
zebra_vxlan_close_tables(zvrf);
zebra_mpls_close_tables(zvrf);
otable = otable_pop(&zvrf->other_tables);
while (otable) {
zebra_router_release_table(zvrf, otable->table_id,
otable->afi, otable->safi);
XFREE(MTYPE_OTHER_TABLE, otable);
otable = otable_pop(&zvrf->other_tables);
}
/* Cleanup EVPN states for vrf */
zebra_vxlan_vrf_delete(zvrf);
zebra_routemap_vrf_delete(zvrf);
list_delete_all_node(zvrf->rid_all_sorted_list);
list_delete_all_node(zvrf->rid_lo_sorted_list);
list_delete_all_node(zvrf->rid6_all_sorted_list);
list_delete_all_node(zvrf->rid6_lo_sorted_list);
otable_fini(&zvrf->other_tables);
XFREE(MTYPE_ZEBRA_VRF, zvrf);
vrf->info = NULL;
return 0;
}
/* Lookup the routing table in a VRF based on both VRF-Id and table-id.
* NOTE: Table-id is relevant on two modes:
* - case VRF backend is default : on default VRF only
* - case VRF backend is netns : on all VRFs
*/
struct route_table *zebra_vrf_lookup_table_with_table_id(afi_t afi, safi_t safi,
vrf_id_t vrf_id,
uint32_t table_id)
{
struct zebra_vrf *zvrf = vrf_info_lookup(vrf_id);
struct other_route_table ort, *otable;
if (!zvrf)
return NULL;
if (afi >= AFI_MAX || safi >= SAFI_MAX)
return NULL;
if (table_id == zvrf->table_id)
return zebra_vrf_table(afi, safi, vrf_id);
ort.afi = afi;
ort.safi = safi;
ort.table_id = table_id;
otable = otable_find(&zvrf->other_tables, &ort);
if (otable)
return otable->table;
return NULL;
}
struct route_table *zebra_vrf_get_table_with_table_id(afi_t afi, safi_t safi,
vrf_id_t vrf_id,
uint32_t table_id)
{
struct zebra_vrf *zvrf = vrf_info_lookup(vrf_id);
struct other_route_table *otable;
struct route_table *table;
table = zebra_vrf_lookup_table_with_table_id(afi, safi, vrf_id,
table_id);
if (table)
goto done;
/* Create it as an `other` table */
table = zebra_router_get_table(zvrf, table_id, afi, safi);
otable = XCALLOC(MTYPE_OTHER_TABLE, sizeof(*otable));
otable->afi = afi;
otable->safi = safi;
otable->table_id = table_id;
otable->table = table;
otable_add(&zvrf->other_tables, otable);
done:
return table;
}
static void zebra_rnhtable_node_cleanup(struct route_table *table,
struct route_node *node)
{
if (node->info)
zebra_free_rnh(node->info);
}
/*
* Create a routing table for the specific AFI/SAFI in the given VRF.
*/
static void zebra_vrf_table_create(struct zebra_vrf *zvrf, afi_t afi,
safi_t safi)
{
struct route_node *rn;
struct prefix p;
assert(!zvrf->table[afi][safi]);
zvrf->table[afi][safi] =
zebra_router_get_table(zvrf, zvrf->table_id, afi, safi);
memset(&p, 0, sizeof(p));
p.family = afi2family(afi);
rn = srcdest_rnode_get(zvrf->table[afi][safi], &p, NULL);
zebra_rib_create_dest(rn);
}
/* Allocate new zebra VRF. */
struct zebra_vrf *zebra_vrf_alloc(struct vrf *vrf)
{
struct zebra_vrf *zvrf;
zvrf = XCALLOC(MTYPE_ZEBRA_VRF, sizeof(struct zebra_vrf));
zvrf->vrf = vrf;
vrf->info = zvrf;
zebra_vxlan_init_tables(zvrf);
zebra_mpls_init_tables(zvrf);
zebra_pw_init(zvrf);
zvrf->table_id = RT_TABLE_MAIN;
/* by default table ID is default one */
return zvrf;
}
/* Lookup VRF by identifier. */
struct zebra_vrf *zebra_vrf_lookup_by_id(vrf_id_t vrf_id)
{
return vrf_info_lookup(vrf_id);
}
/* Lookup VRF by name. */
struct zebra_vrf *zebra_vrf_lookup_by_name(const char *name)
{
struct vrf *vrf;
if (!name)
name = VRF_DEFAULT_NAME;
vrf = vrf_lookup_by_name(name);
if (vrf)
return ((struct zebra_vrf *)vrf->info);
return NULL;
}
/* Lookup the routing table in an enabled VRF. */
struct route_table *zebra_vrf_table(afi_t afi, safi_t safi, vrf_id_t vrf_id)
{
struct zebra_vrf *zvrf = vrf_info_lookup(vrf_id);
if (!zvrf)
return NULL;
if (afi >= AFI_MAX || safi >= SAFI_MAX)
return NULL;
return zvrf->table[afi][safi];
}
static int vrf_config_write(struct vty *vty)
{
struct vrf *vrf;
struct zebra_vrf *zvrf;
RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) {
zvrf = vrf->info;
if (!zvrf)
continue;
if (zvrf_id(zvrf) == VRF_DEFAULT) {
if (zvrf->l3vni)
vty_out(vty, "vni %u%s\n", zvrf->l3vni,
is_l3vni_for_prefix_routes_only(
zvrf->l3vni)
? " prefix-routes-only"
: "");
if (zvrf->zebra_rnh_ip_default_route)
vty_out(vty, "ip nht resolve-via-default\n");
if (zvrf->zebra_rnh_ipv6_default_route)
vty_out(vty, "ipv6 nht resolve-via-default\n");
if (zvrf->tbl_mgr
&& (zvrf->tbl_mgr->start || zvrf->tbl_mgr->end))
vty_out(vty, "ip table range %u %u\n",
zvrf->tbl_mgr->start,
zvrf->tbl_mgr->end);
} else {
vty_frame(vty, "vrf %s\n", zvrf_name(zvrf));
if (zvrf->l3vni)
vty_out(vty, " vni %u%s\n", zvrf->l3vni,
is_l3vni_for_prefix_routes_only(
zvrf->l3vni)
? " prefix-routes-only"
: "");
zebra_ns_config_write(vty, (struct ns *)vrf->ns_ctxt);
if (zvrf->zebra_rnh_ip_default_route)
vty_out(vty, " ip nht resolve-via-default\n");
if (zvrf->zebra_rnh_ipv6_default_route)
vty_out(vty, " ipv6 nht resolve-via-default\n");
if (zvrf->tbl_mgr && vrf_is_backend_netns()
&& (zvrf->tbl_mgr->start || zvrf->tbl_mgr->end))
vty_out(vty, " ip table range %u %u\n",
zvrf->tbl_mgr->start,
zvrf->tbl_mgr->end);
}
zebra_routemap_config_write_protocol(vty, zvrf);
router_id_write(vty, zvrf);
if (zvrf_id(zvrf) != VRF_DEFAULT)
vty_endframe(vty, "exit-vrf\n!\n");
else
vty_out(vty, "!\n");
}
return 0;
}
DEFPY (vrf_netns,
vrf_netns_cmd,
"netns NAME$netns_name",
"Attach VRF to a Namespace\n"
"The file name in " NS_RUN_DIR ", or a full pathname\n")
{
char *pathname = ns_netns_pathname(vty, netns_name);
int ret;
VTY_DECLVAR_CONTEXT(vrf, vrf);
if (!pathname)
return CMD_WARNING_CONFIG_FAILED;
frr_with_privs(&zserv_privs) {
ret = zebra_vrf_netns_handler_create(
vty, vrf, pathname, NS_UNKNOWN, NS_UNKNOWN, NS_UNKNOWN);
}
return ret;
}
DEFUN (no_vrf_netns,
no_vrf_netns_cmd,
"no netns [NAME]",
NO_STR
"Detach VRF from a Namespace\n"
"The file name in " NS_RUN_DIR ", or a full pathname\n")
{
struct ns *ns = NULL;
VTY_DECLVAR_CONTEXT(vrf, vrf);
if (!vrf_is_backend_netns()) {
vty_out(vty, "VRF backend is not Netns. Aborting\n");
return CMD_WARNING_CONFIG_FAILED;
}
if (!vrf->ns_ctxt) {
vty_out(vty, "VRF %s(%u) is not configured with NetNS\n",
vrf->name, vrf->vrf_id);
return CMD_WARNING_CONFIG_FAILED;
}
ns = (struct ns *)vrf->ns_ctxt;
ns->vrf_ctxt = NULL;
vrf_disable(vrf);
/* vrf ID from VRF is necessary for Zebra
* so that propagate to other clients is done
*/
ns_delete(ns);
vrf->ns_ctxt = NULL;
return CMD_SUCCESS;
}
/* if ns_id is different and not VRF_UNKNOWN,
* then update vrf identifier, and enable VRF
*/
static void vrf_update_vrf_id(ns_id_t ns_id, void *opaqueptr)
{
ns_id_t vrf_id = (vrf_id_t)ns_id;
vrf_id_t old_vrf_id;
struct vrf *vrf = (struct vrf *)opaqueptr;
if (!vrf)
return;
old_vrf_id = vrf->vrf_id;
if (vrf_id == vrf->vrf_id)
return;
if (vrf->vrf_id != VRF_UNKNOWN)
RB_REMOVE(vrf_id_head, &vrfs_by_id, vrf);
vrf->vrf_id = vrf_id;
RB_INSERT(vrf_id_head, &vrfs_by_id, vrf);
if (old_vrf_id == VRF_UNKNOWN)
vrf_enable(vrf);
}
int zebra_vrf_netns_handler_create(struct vty *vty, struct vrf *vrf,
char *pathname, ns_id_t ns_id,
ns_id_t internal_ns_id,
ns_id_t rel_def_ns_id)
{
struct ns *ns = NULL;
if (!vrf)
return CMD_WARNING_CONFIG_FAILED;
if (vrf->vrf_id != VRF_UNKNOWN && vrf->ns_ctxt == NULL) {
if (vty)
vty_out(vty,
"VRF %u is already configured with VRF %s\n",
vrf->vrf_id, vrf->name);
else
zlog_info("VRF %u is already configured with VRF %s",
vrf->vrf_id, vrf->name);
return CMD_WARNING_CONFIG_FAILED;
}
if (vrf->ns_ctxt != NULL) {
ns = (struct ns *)vrf->ns_ctxt;
if (!strcmp(ns->name, pathname)) {
if (vty)
vty_out(vty,
"VRF %u already configured with NETNS %s\n",
vrf->vrf_id, ns->name);
else
zlog_info(
"VRF %u already configured with NETNS %s",
vrf->vrf_id, ns->name);
return CMD_WARNING;
}
}
ns = ns_lookup_name(pathname);
if (ns && ns->vrf_ctxt) {
struct vrf *vrf2 = (struct vrf *)ns->vrf_ctxt;
if (vrf2 == vrf)
return CMD_SUCCESS;
if (vty)
vty_out(vty,
"NS %s is already configured with VRF %u(%s)\n",
ns->name, vrf2->vrf_id, vrf2->name);
else
zlog_info("NS %s is already configured with VRF %u(%s)",
ns->name, vrf2->vrf_id, vrf2->name);
return CMD_WARNING_CONFIG_FAILED;
}
ns = ns_get_created(ns, pathname, ns_id);
ns->internal_ns_id = internal_ns_id;
ns->relative_default_ns = rel_def_ns_id;
ns->vrf_ctxt = (void *)vrf;
vrf->ns_ctxt = (void *)ns;
/* update VRF netns NAME */
strlcpy(vrf->data.l.netns_name, basename(pathname), NS_NAMSIZ);
if (!ns_enable(ns, vrf_update_vrf_id)) {
if (vty)
vty_out(vty, "Can not associate NS %u with NETNS %s\n",
ns->ns_id, ns->name);
else
zlog_info("Can not associate NS %u with NETNS %s",
ns->ns_id, ns->name);
return CMD_WARNING_CONFIG_FAILED;
}
return CMD_SUCCESS;
}
/* Zebra VRF initialization. */
void zebra_vrf_init(void)
{
vrf_init(zebra_vrf_new, zebra_vrf_enable, zebra_vrf_disable,
zebra_vrf_delete);
hook_register(zserv_client_close, release_daemon_table_chunks);
vrf_cmd_init(vrf_config_write);
if (vrf_is_backend_netns() && ns_have_netns()) {
/* Install NS commands. */
install_element(VRF_NODE, &vrf_netns_cmd);
install_element(VRF_NODE, &no_vrf_netns_cmd);
}
}
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