[PATCH net-next v5 7/9] net: marvell: prestera: add stub handler neighbour events

From: Yevhen Orlov
Date: Thu Sep 08 2022 - 18:54:49 EST


Actual handler will be added in next patches

Co-developed-by: Taras Chornyi <tchornyi@xxxxxxxxxxx>
Signed-off-by: Taras Chornyi <tchornyi@xxxxxxxxxxx>
Co-developed-by: Oleksandr Mazur <oleksandr.mazur@xxxxxxxxxxx>
Signed-off-by: Oleksandr Mazur <oleksandr.mazur@xxxxxxxxxxx>
Signed-off-by: Yevhen Orlov <yevhen.orlov@xxxxxxxxxxx>
---
.../net/ethernet/marvell/prestera/prestera.h | 1 +
.../marvell/prestera/prestera_router.c | 59 +++++++++++++++++++
2 files changed, 60 insertions(+)

diff --git a/drivers/net/ethernet/marvell/prestera/prestera.h b/drivers/net/ethernet/marvell/prestera/prestera.h
index fe0d6001a6b6..2f2f80e7e358 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera.h
+++ b/drivers/net/ethernet/marvell/prestera/prestera.h
@@ -320,6 +320,7 @@ struct prestera_router {
struct notifier_block inetaddr_nb;
struct notifier_block inetaddr_valid_nb;
struct notifier_block fib_nb;
+ struct notifier_block netevent_nb;
u8 *nhgrp_hw_state_cache; /* Bitmap cached hw state of nhs */
unsigned long nhgrp_hw_cache_kick; /* jiffies */
};
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_router.c b/drivers/net/ethernet/marvell/prestera/prestera_router.c
index 15958f83107e..a6af3b53838e 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_router.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_router.c
@@ -8,6 +8,7 @@
#include <net/switchdev.h>
#include <linux/rhashtable.h>
#include <net/nexthop.h>
+#include <net/netevent.h>

#include "prestera.h"
#include "prestera_router_hw.h"
@@ -610,6 +611,56 @@ static int __prestera_router_fib_event(struct notifier_block *nb,
return NOTIFY_DONE;
}

+struct prestera_netevent_work {
+ struct work_struct work;
+ struct prestera_switch *sw;
+ struct neighbour *n;
+};
+
+static void prestera_router_neigh_event_work(struct work_struct *work)
+{
+ struct prestera_netevent_work *net_work =
+ container_of(work, struct prestera_netevent_work, work);
+ struct neighbour *n = net_work->n;
+
+ /* neigh - its not hw related object. It stored only in kernel. So... */
+ rtnl_lock();
+
+ /* TODO: handler */
+
+ neigh_release(n);
+ rtnl_unlock();
+ kfree(net_work);
+}
+
+static int prestera_router_netevent_event(struct notifier_block *nb,
+ unsigned long event, void *ptr)
+{
+ struct prestera_netevent_work *net_work;
+ struct prestera_router *router;
+ struct neighbour *n = ptr;
+
+ router = container_of(nb, struct prestera_router, netevent_nb);
+
+ switch (event) {
+ case NETEVENT_NEIGH_UPDATE:
+ if (n->tbl->family != AF_INET)
+ return NOTIFY_DONE;
+
+ net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC);
+ if (WARN_ON(!net_work))
+ return NOTIFY_BAD;
+
+ neigh_clone(n);
+ net_work->n = n;
+ net_work->sw = router->sw;
+ INIT_WORK(&net_work->work, prestera_router_neigh_event_work);
+ prestera_queue_work(&net_work->work);
+ }
+
+ return NOTIFY_DONE;
+}
+
int prestera_router_init(struct prestera_switch *sw)
{
struct prestera_router *router;
@@ -648,6 +699,11 @@ int prestera_router_init(struct prestera_switch *sw)
if (err)
goto err_register_inetaddr_notifier;

+ router->netevent_nb.notifier_call = prestera_router_netevent_event;
+ err = register_netevent_notifier(&router->netevent_nb);
+ if (err)
+ goto err_register_netevent_notifier;
+
router->fib_nb.notifier_call = __prestera_router_fib_event;
err = register_fib_notifier(&init_net, &router->fib_nb,
/* TODO: flush fib entries */ NULL, NULL);
@@ -657,6 +713,8 @@ int prestera_router_init(struct prestera_switch *sw)
return 0;

err_register_fib_notifier:
+ unregister_netevent_notifier(&router->netevent_nb);
+err_register_netevent_notifier:
unregister_inetaddr_notifier(&router->inetaddr_nb);
err_register_inetaddr_notifier:
unregister_inetaddr_validator_notifier(&router->inetaddr_valid_nb);
@@ -674,6 +732,7 @@ int prestera_router_init(struct prestera_switch *sw)
void prestera_router_fini(struct prestera_switch *sw)
{
unregister_fib_notifier(&init_net, &sw->router->fib_nb);
+ unregister_netevent_notifier(&sw->router->netevent_nb);
unregister_inetaddr_notifier(&sw->router->inetaddr_nb);
unregister_inetaddr_validator_notifier(&sw->router->inetaddr_valid_nb);
prestera_queue_drain();
--
2.17.1