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/*
* zebra affinity-map.
*
* Copyright 2022 6WIND S.A.
*
* This file is part of Free Range Routing (FRR).
*
* FRR 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.
*
* FRR 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>
#include "lib/if.h"
#include "lib/vrf.h"
#include "zebra/redistribute.h"
#include "zebra/zebra_affinitymap.h"
static bool zebra_affinity_map_check_use(const char *affmap_name)
{
char xpath[XPATH_MAXLEN];
struct interface *ifp;
struct vrf *vrf;
RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
FOR_ALL_INTERFACES (vrf, ifp) {
snprintf(xpath, sizeof(xpath),
"/frr-interface:lib/interface[name='%s']",
ifp->name);
if (!yang_dnode_exists(running_config->dnode, xpath))
continue;
snprintf(
xpath, sizeof(xpath),
"/frr-interface:lib/interface[name='%s']/frr-zebra:zebra/link-params/affinities[affinity='%s']",
ifp->name, affmap_name);
if (yang_dnode_exists(running_config->dnode, xpath))
return true;
}
}
return false;
}
static bool zebra_affinity_map_check_update(const char *affmap_name,
uint16_t new_pos)
{
char xpath[XPATH_MAXLEN];
struct interface *ifp;
struct vrf *vrf;
/* check whether the affinity-map new bit position is upper than 31
* but is used on an interface on which affinity-mode is standard.
* Return false if the change is not possible.
*/
if (new_pos < 32)
return true;
RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
FOR_ALL_INTERFACES (vrf, ifp) {
snprintf(xpath, sizeof(xpath),
"/frr-interface:lib/interface[name='%s']",
ifp->name);
if (!yang_dnode_exists(running_config->dnode, xpath))
continue;
snprintf(
xpath, sizeof(xpath),
"/frr-interface:lib/interface[name='%s']/frr-zebra:zebra/link-params/affinities[affinity='%s']",
ifp->name, affmap_name);
if (!yang_dnode_exists(running_config->dnode, xpath))
continue;
if (yang_dnode_get_enum(
running_config->dnode,
"/frr-interface:lib/interface[name='%s']/frr-zebra:zebra/link-params/affinity-mode",
ifp->name) == AFFINITY_MODE_STANDARD)
return false;
}
}
return true;
}
static void zebra_affinity_map_update(const char *affmap_name, uint16_t old_pos,
uint16_t new_pos)
{
struct if_link_params *iflp;
enum affinity_mode aff_mode;
char xpath[XPATH_MAXLEN];
struct interface *ifp;
struct vrf *vrf;
RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) {
FOR_ALL_INTERFACES (vrf, ifp) {
snprintf(xpath, sizeof(xpath),
"/frr-interface:lib/interface[name='%s']",
ifp->name);
if (!yang_dnode_exists(running_config->dnode, xpath))
continue;
snprintf(
xpath, sizeof(xpath),
"/frr-interface:lib/interface[name='%s']/frr-zebra:zebra/link-params/affinities[affinity='%s']",
ifp->name, affmap_name);
if (!yang_dnode_exists(running_config->dnode, xpath))
continue;
aff_mode = yang_dnode_get_enum(
running_config->dnode,
"/frr-interface:lib/interface[name='%s']/frr-zebra:zebra/link-params/affinity-mode",
ifp->name);
iflp = if_link_params_get(ifp);
if (aff_mode == AFFINITY_MODE_EXTENDED ||
aff_mode == AFFINITY_MODE_BOTH) {
admin_group_unset(&iflp->ext_admin_grp,
old_pos);
admin_group_set(&iflp->ext_admin_grp, new_pos);
}
if (aff_mode == AFFINITY_MODE_STANDARD ||
aff_mode == AFFINITY_MODE_BOTH) {
iflp->admin_grp &= ~(1 << old_pos);
if (new_pos < 32)
iflp->admin_grp |= 1 << new_pos;
if (iflp->admin_grp == 0)
UNSET_PARAM(iflp, LP_ADM_GRP);
}
if (if_is_operative(ifp))
zebra_interface_parameters_update(ifp);
}
}
}
void zebra_affinity_map_init(void)
{
affinity_map_init();
affinity_map_set_check_use_hook(zebra_affinity_map_check_use);
affinity_map_set_check_update_hook(zebra_affinity_map_check_update);
affinity_map_set_update_hook(zebra_affinity_map_update);
}
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