ipv6: Stop sending in-kernel notifications for each nexthop

Both listeners - mlxsw and netdevsim - of IPv6 FIB notifications are now
ready to handle IPv6 multipath notifications.

Therefore, stop ignoring such notifications in both drivers and stop
sending notification for each added / deleted nexthop.

v2:
* Remove 'multipath_rt' from 'struct fib6_entry_notifier_info'

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index 92ec651..e618be7 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -6294,8 +6294,6 @@ static int mlxsw_sp_router_fib_event(struct notifier_block *nb,
                                NL_SET_ERR_MSG_MOD(info->extack, "IPv6 route with nexthop objects is not supported");
                                return notifier_from_errno(-EINVAL);
                        }
-                       if (fen6_info->multipath_rt)
-                               return NOTIFY_DONE;
                }
                break;
        }

diff --git a/drivers/net/netdevsim/fib.c b/drivers/net/netdevsim/fib.c
index 83ba511..8c57ba7 100644 (file)
--- a/drivers/net/netdevsim/fib.c
+++ b/drivers/net/netdevsim/fib.c
@@ -190,13 +190,6 @@ static int nsim_fib_event_nb(struct notifier_block *nb, unsigned long event,
 
        case FIB_EVENT_ENTRY_ADD:  /* fall through */
        case FIB_EVENT_ENTRY_DEL:
-               if (info->family == AF_INET6) {
-                       struct fib6_entry_notifier_info *fen6_info = ptr;
-
-                       if (fen6_info->multipath_rt)
-                               return NOTIFY_DONE;
-               }
-
                err = nsim_fib_event(data, info,
                                     event == FIB_EVENT_ENTRY_ADD);
                break;

diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 7c3d5ab..87331f2 100644 (file)
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -378,7 +378,6 @@ struct fib6_entry_notifier_info {
        struct fib_notifier_info info; /* must be first */
        struct fib6_info *rt;
        unsigned int nsiblings;
-       bool multipath_rt;
 };
 
 /*

diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index df08ba8..1d16a01 100644 (file)
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -391,7 +391,6 @@ int call_fib6_multipath_entry_notifiers(struct net *net,
                .info.extack = extack,
                .rt = rt,
                .nsiblings = nsiblings,
-               .multipath_rt = true,
        };
 
        rt->fib6_table->fib_seq++;
@@ -1140,11 +1139,13 @@ next_iter:
 add:
                nlflags |= NLM_F_CREATE;
 
-               err = call_fib6_entry_notifiers(info->nl_net,
-                                               FIB_EVENT_ENTRY_ADD,
-                                               rt, extack);
-               if (err)
-                       return err;
+               if (!info->skip_notify_kernel) {
+                       err = call_fib6_entry_notifiers(info->nl_net,
+                                                       FIB_EVENT_ENTRY_ADD,
+                                                       rt, extack);
+                       if (err)
+                               return err;
+               }
 
                rcu_assign_pointer(rt->fib6_next, iter);
                fib6_info_hold(rt);
@@ -1169,11 +1170,13 @@ add:
                        return -ENOENT;
                }
 
-               err = call_fib6_entry_notifiers(info->nl_net,
-                                               FIB_EVENT_ENTRY_REPLACE,
-                                               rt, extack);
-               if (err)
-                       return err;
+               if (!info->skip_notify_kernel) {
+                       err = call_fib6_entry_notifiers(info->nl_net,
+                                                       FIB_EVENT_ENTRY_REPLACE,
+                                                       rt, extack);
+                       if (err)
+                               return err;
+               }
 
                fib6_info_hold(rt);
                rcu_assign_pointer(rt->fib6_node, fn);
@@ -1856,9 +1859,11 @@ static void fib6_del_route(struct fib6_table *table, struct fib6_node *fn,
 
        fib6_purge_rt(rt, fn, net);
 
-       call_fib6_entry_notifiers(net, FIB_EVENT_ENTRY_DEL, rt, NULL);
+       if (!info->skip_notify_kernel)
+               call_fib6_entry_notifiers(net, FIB_EVENT_ENTRY_DEL, rt, NULL);
        if (!info->skip_notify)
                inet6_rt_notify(RTM_DELROUTE, rt, info, 0);
+
        fib6_info_release(rt);
 }