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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2019-2021 Marvell International Ltd. All rights reserved */
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/inetdevice.h>
#include <net/switchdev.h>
#include "prestera.h"
#include "prestera_router_hw.h"
/* This util to be used, to convert kernel rules for default vr in hw_vr */
static u32 prestera_fix_tb_id(u32 tb_id)
{
if (tb_id == RT_TABLE_UNSPEC ||
tb_id == RT_TABLE_LOCAL ||
tb_id == RT_TABLE_DEFAULT)
tb_id = RT_TABLE_MAIN;
return tb_id;
}
static int __prestera_inetaddr_port_event(struct net_device *port_dev,
unsigned long event,
struct netlink_ext_ack *extack)
{
struct prestera_port *port = netdev_priv(port_dev);
int err;
struct prestera_rif_entry *re;
struct prestera_rif_entry_key re_key = {};
u32 kern_tb_id;
err = prestera_is_valid_mac_addr(port, port_dev->dev_addr);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "RIF MAC must have the same prefix");
return err;
}
kern_tb_id = l3mdev_fib_table(port_dev);
re_key.iface.type = PRESTERA_IF_PORT_E;
re_key.iface.dev_port.hw_dev_num = port->dev_id;
re_key.iface.dev_port.port_num = port->hw_id;
re = prestera_rif_entry_find(port->sw, &re_key);
switch (event) {
case NETDEV_UP:
if (re) {
NL_SET_ERR_MSG_MOD(extack, "rif_entry already exist");
return -EEXIST;
}
re = prestera_rif_entry_create(port->sw, &re_key,
prestera_fix_tb_id(kern_tb_id),
port_dev->dev_addr);
if (!re) {
NL_SET_ERR_MSG_MOD(extack, "Can't create rif_entry");
return -EINVAL;
}
dev_hold(port_dev);
break;
case NETDEV_DOWN:
if (!re) {
NL_SET_ERR_MSG_MOD(extack, "rif_entry not exist");
return -EEXIST;
}
prestera_rif_entry_destroy(port->sw, re);
dev_put(port_dev);
break;
}
return 0;
}
static int __prestera_inetaddr_event(struct prestera_switch *sw,
struct net_device *dev,
unsigned long event,
struct netlink_ext_ack *extack)
{
if (prestera_netdev_check(dev) && !netif_is_bridge_port(dev) &&
!netif_is_lag_port(dev) && !netif_is_ovs_port(dev))
return __prestera_inetaddr_port_event(dev, event, extack);
return 0;
}
static int __prestera_inetaddr_cb(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
struct net_device *dev = ifa->ifa_dev->dev;
struct prestera_router *router = container_of(nb,
struct prestera_router,
inetaddr_nb);
struct in_device *idev;
int err = 0;
if (event != NETDEV_DOWN)
goto out;
/* Ignore if this is not latest address */
idev = __in_dev_get_rtnl(dev);
if (idev && idev->ifa_list)
goto out;
err = __prestera_inetaddr_event(router->sw, dev, event, NULL);
out:
return notifier_from_errno(err);
}
static int __prestera_inetaddr_valid_cb(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct in_validator_info *ivi = (struct in_validator_info *)ptr;
struct net_device *dev = ivi->ivi_dev->dev;
struct prestera_router *router = container_of(nb,
struct prestera_router,
inetaddr_valid_nb);
struct in_device *idev;
int err = 0;
if (event != NETDEV_UP)
goto out;
/* Ignore if this is not first address */
idev = __in_dev_get_rtnl(dev);
if (idev && idev->ifa_list)
goto out;
if (ipv4_is_multicast(ivi->ivi_addr)) {
err = -EINVAL;
goto out;
}
err = __prestera_inetaddr_event(router->sw, dev, event, ivi->extack);
out:
return notifier_from_errno(err);
}
int prestera_router_init(struct prestera_switch *sw)
{
struct prestera_router *router;
int err;
router = kzalloc(sizeof(*sw->router), GFP_KERNEL);
if (!router)
return -ENOMEM;
sw->router = router;
router->sw = sw;
err = prestera_router_hw_init(sw);
if (err)
goto err_router_lib_init;
router->inetaddr_valid_nb.notifier_call = __prestera_inetaddr_valid_cb;
err = register_inetaddr_validator_notifier(&router->inetaddr_valid_nb);
if (err)
goto err_register_inetaddr_validator_notifier;
router->inetaddr_nb.notifier_call = __prestera_inetaddr_cb;
err = register_inetaddr_notifier(&router->inetaddr_nb);
if (err)
goto err_register_inetaddr_notifier;
return 0;
err_register_inetaddr_notifier:
unregister_inetaddr_validator_notifier(&router->inetaddr_valid_nb);
err_register_inetaddr_validator_notifier:
/* prestera_router_hw_fini */
err_router_lib_init:
kfree(sw->router);
return err;
}
void prestera_router_fini(struct prestera_switch *sw)
{
unregister_inetaddr_notifier(&sw->router->inetaddr_nb);
unregister_inetaddr_validator_notifier(&sw->router->inetaddr_valid_nb);
/* router_hw_fini */
kfree(sw->router);
sw->router = NULL;
}
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