From: Ido Schimmel <ido...@nvidia.com>
Prepare the new notification information so that it could be passed to
listeners in the new patch.
Signed-off-by: Ido Schimmel <ido...@nvidia.com>
---
net/ipv4/nexthop.c | 108 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 108 insertions(+)
diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
index dafcb9f17250..68fd25c6eec7 100644
--- a/net/ipv4/nexthop.c
+++ b/net/ipv4/nexthop.c
@@ -36,15 +36,123 @@ static const struct nla_policy rtm_nh_policy[NHA_MAX + 1]
= {
[NHA_FDB] = { .type = NLA_FLAG },
};
+static bool nexthop_notifiers_is_empty(struct net *net)
+{
+ return !net->nexthop.notifier_chain.head;
+}
+
+static void
+__nh_notifier_single_info_init(struct nh_notifier_single_info *nh_info,
+ const struct nexthop *nh)
+{
+ struct nh_info *nhi = rtnl_dereference(nh->nh_info);
+
+ nh_info->dev = nhi->fib_nhc.nhc_dev;
+ nh_info->gw_family = nhi->fib_nhc.nhc_gw_family;
+ if (nh_info->gw_family == AF_INET)
+ nh_info->ipv4 = nhi->fib_nhc.nhc_gw.ipv4;
+ else if (nh_info->gw_family == AF_INET6)
+ nh_info->ipv6 = nhi->fib_nhc.nhc_gw.ipv6;
+ nh_info->is_reject = nhi->reject_nh;
+ nh_info->is_fdb = nhi->fdb_nh;
+ nh_info->is_encap = !!nhi->fib_nhc.nhc_lwtstate;
+}
+
+static int nh_notifier_single_info_init(struct nh_notifier_info *info,
+ const struct nexthop *nh)
+{
+ info->nh = kzalloc(sizeof(*info->nh), GFP_KERNEL);
+ if (!info->nh)
+ return -ENOMEM;
+
+ __nh_notifier_single_info_init(info->nh, nh);
+
+ return 0;
+}
+
+static void nh_notifier_single_info_fini(struct nh_notifier_info *info)
+{
+ kfree(info->nh);
+}
+
+static int nh_notifier_grp_info_init(struct nh_notifier_info *info,
+ const struct nexthop *nh)
+{
+ struct nh_group *nhg = rtnl_dereference(nh->nh_grp);
+ u16 num_nh = nhg->num_nh;
+ int i;
+
+ info->nh_grp = kzalloc(struct_size(info->nh_grp, nh_entries, num_nh),
+ GFP_KERNEL);
+ if (!info->nh_grp)
+ return -ENOMEM;
+
+ info->nh_grp->num_nh = num_nh;
+ info->nh_grp->is_fdb = nhg->fdb_nh;
+
+ for (i = 0; i < num_nh; i++) {
+ struct nh_grp_entry *nhge = &nhg->nh_entries[i];
+
+ info->nh_grp->nh_entries[i].id = nhge->nh->id;
+ info->nh_grp->nh_entries[i].weight = nhge->weight;
+ __nh_notifier_single_info_init(&info->nh_grp->nh_entries[i].nh,
+ nhge->nh);
+ }
+
+ return 0;
+}
+
+static void nh_notifier_grp_info_fini(struct nh_notifier_info *info)
+{
+ kfree(info->nh_grp);
+}
+
+static int nh_notifier_info_init(struct nh_notifier_info *info,
+ const struct nexthop *nh)
+{
+ info->id = nh->id;
+ info->is_grp = nh->is_group;
+
+ if (info->is_grp)
+ return nh_notifier_grp_info_init(info, nh);
+ else
+ return nh_notifier_single_info_init(info, nh);
+}
+
+static void nh_notifier_info_fini(struct nh_notifier_info *info)
+{
+ if (info->is_grp)
+ nh_notifier_grp_info_fini(info);
+ else
+ nh_notifier_single_info_fini(info);
+}
+
static int call_nexthop_notifiers(struct net *net,
enum nexthop_event_type event_type,
struct nexthop *nh,
struct netlink_ext_ack *extack)
{
+ struct nh_notifier_info info = {
+ .net = net,
+ .extack = extack,
+ };
int err;
+ ASSERT_RTNL();
+
+ if (nexthop_notifiers_is_empty(net))
+ return 0;
+
+ err = nh_notifier_info_init(&info, nh);
+ if (err) {
+ NL_SET_ERR_MSG(extack, "Failed to initialize nexthop notifier
info");
+ return err;
+ }
+
err = blocking_notifier_call_chain(&net->nexthop.notifier_chain,
event_type, nh);
+ nh_notifier_info_fini(&info);
+
return notifier_to_errno(err);
}
--
2.26.2
