[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->has_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 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);
+ event_type, &info);
+ nh_notifier_info_fini(&info);
+
+ return notifier_to_errno(err);
+}
+
+static int call_nexthop_notifier(struct notifier_block *nb, 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;
+
+ err = nh_notifier_info_init(&info, nh);
+ if (err)
+ return err;
+
+ err = nb->notifier_call(nb, event_type, &info);
+ nh_notifier_info_fini(&info);
+
return notifier_to_errno(err);
}
{
struct nh_grp_entry *nhges, *new_nhges;
struct nexthop *nhp = nhge->nh_parent;
+ struct netlink_ext_ack extack;
struct nexthop *nh = nhge->nh;
struct nh_group *nhg, *newg;
- int i, j;
+ int i, j, err;
WARN_ON(!nh);
list_del(&nhge->nh_list);
nexthop_put(nhge->nh);
+ err = call_nexthop_notifiers(net, NEXTHOP_EVENT_REPLACE, nhp, &extack);
+ if (err)
+ pr_err("%s\n", extack._msg);
+
if (nlinfo)
nexthop_notify(RTM_NEWNEXTHOP, nhp, nlinfo);
}
static void remove_nexthop(struct net *net, struct nexthop *nh,
struct nl_info *nlinfo)
{
- call_nexthop_notifiers(net, NEXTHOP_EVENT_DEL, nh);
+ call_nexthop_notifiers(net, NEXTHOP_EVENT_DEL, nh, NULL);
/* remove from the tree */
rb_erase(&nh->rb_node, &net->nexthop.rb_root);
struct netlink_ext_ack *extack)
{
struct nh_group *oldg, *newg;
- int i;
+ int i, err;
if (!new->is_group) {
NL_SET_ERR_MSG(extack, "Can not replace a nexthop group with a nexthop.");
return -EINVAL;
}
+ err = call_nexthop_notifiers(net, NEXTHOP_EVENT_REPLACE, new, extack);
+ if (err)
+ return err;
+
oldg = rtnl_dereference(old->nh_grp);
newg = rtnl_dereference(new->nh_grp);
struct nexthop *new,
struct netlink_ext_ack *extack)
{
+ u8 old_protocol, old_nh_flags;
struct nh_info *oldi, *newi;
+ struct nh_grp_entry *nhge;
+ int err;
if (new->is_group) {
NL_SET_ERR_MSG(extack, "Can not replace a nexthop with a nexthop group.");
return -EINVAL;
}
+ err = call_nexthop_notifiers(net, NEXTHOP_EVENT_REPLACE, new, extack);
+ if (err)
+ return err;
+
+ /* Hardware flags were set on 'old' as 'new' is not in the red-black
+ * tree. Therefore, inherit the flags from 'old' to 'new'.
+ */
+ new->nh_flags |= old->nh_flags & (RTNH_F_OFFLOAD | RTNH_F_TRAP);
+
oldi = rtnl_dereference(old->nh_info);
newi = rtnl_dereference(new->nh_info);
newi->nh_parent = old;
oldi->nh_parent = new;
+ old_protocol = old->protocol;
+ old_nh_flags = old->nh_flags;
+
old->protocol = new->protocol;
old->nh_flags = new->nh_flags;
rcu_assign_pointer(old->nh_info, newi);
rcu_assign_pointer(new->nh_info, oldi);
+ /* Send a replace notification for all the groups using the nexthop. */
+ list_for_each_entry(nhge, &old->grp_list, nh_list) {
+ struct nexthop *nhp = nhge->nh_parent;
+
+ err = call_nexthop_notifiers(net, NEXTHOP_EVENT_REPLACE, nhp,
+ extack);
+ if (err)
+ goto err_notify;
+ }
+
/* When replacing an IPv4 nexthop with an IPv6 nexthop, potentially
* update IPv4 indication in all the groups using the nexthop.
*/
if (oldi->family == AF_INET && newi->family == AF_INET6) {
- struct nh_grp_entry *nhge;
-
list_for_each_entry(nhge, &old->grp_list, nh_list) {
struct nexthop *nhp = nhge->nh_parent;
struct nh_group *nhg;
}
return 0;
+
+err_notify:
+ rcu_assign_pointer(new->nh_info, newi);
+ rcu_assign_pointer(old->nh_info, oldi);
+ old->nh_flags = old_nh_flags;
+ old->protocol = old_protocol;
+ oldi->nh_parent = old;
+ newi->nh_parent = new;
+ list_for_each_entry_continue_reverse(nhge, &old->grp_list, nh_list) {
+ struct nexthop *nhp = nhge->nh_parent;
+
+ call_nexthop_notifiers(net, NEXTHOP_EVENT_REPLACE, nhp, extack);
+ }
+ call_nexthop_notifiers(net, NEXTHOP_EVENT_REPLACE, old, extack);
+ return err;
}
static void __nexthop_replace_notify(struct net *net, struct nexthop *nh,
rb_link_node_rcu(&new_nh->rb_node, parent, pp);
rb_insert_color(&new_nh->rb_node, root);
- rc = 0;
+
+ rc = call_nexthop_notifiers(net, NEXTHOP_EVENT_REPLACE, new_nh, extack);
+ if (rc)
+ rb_erase(&new_nh->rb_node, &net->nexthop.rb_root);
+
out:
if (!rc) {
nh_base_seq_inc(net);
.notifier_call = nh_netdev_event,
};
-int register_nexthop_notifier(struct net *net, struct notifier_block *nb)
+static int nexthops_dump(struct net *net, struct notifier_block *nb,
+ struct netlink_ext_ack *extack)
+{
+ struct rb_root *root = &net->nexthop.rb_root;
+ struct rb_node *node;
+ int err = 0;
+
+ for (node = rb_first(root); node; node = rb_next(node)) {
+ struct nexthop *nh;
+
+ nh = rb_entry(node, struct nexthop, rb_node);
+ err = call_nexthop_notifier(nb, net, NEXTHOP_EVENT_REPLACE, nh,
+ extack);
+ if (err)
+ break;
+ }
+
+ return err;
+}
+
+int register_nexthop_notifier(struct net *net, struct notifier_block *nb,
+ struct netlink_ext_ack *extack)
{
- return blocking_notifier_chain_register(&net->nexthop.notifier_chain,
- nb);
+ int err;
+
+ rtnl_lock();
+ err = nexthops_dump(net, nb, extack);
+ if (err)
+ goto unlock;
+ err = blocking_notifier_chain_register(&net->nexthop.notifier_chain,
+ nb);
+unlock:
+ rtnl_unlock();
+ return err;
}
EXPORT_SYMBOL(register_nexthop_notifier);
}
EXPORT_SYMBOL(unregister_nexthop_notifier);
+void nexthop_set_hw_flags(struct net *net, u32 id, bool offload, bool trap)
+{
+ struct nexthop *nexthop;
+
+ rcu_read_lock();
+
+ nexthop = nexthop_find_by_id(net, id);
+ if (!nexthop)
+ goto out;
+
+ nexthop->nh_flags &= ~(RTNH_F_OFFLOAD | RTNH_F_TRAP);
+ if (offload)
+ nexthop->nh_flags |= RTNH_F_OFFLOAD;
+ if (trap)
+ nexthop->nh_flags |= RTNH_F_TRAP;
+
+out:
+ rcu_read_unlock();
+}
+EXPORT_SYMBOL(nexthop_set_hw_flags);
+
static void __net_exit nexthop_net_exit(struct net *net)
{
rtnl_lock();
projects / linux-2.6-microblaze.git / blobdiff