diff options
Diffstat (limited to 'net/ipv6/route.c')
| -rw-r--r-- | net/ipv6/route.c | 89 |
1 files changed, 81 insertions, 8 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index f287375fd0b2..f7257a56072a 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -3531,6 +3531,16 @@ static struct fib6_info *ip6_route_info_create(struct fib6_config *cfg, goto out; } #endif + if (cfg->fc_nh_id) { + nh = nexthop_find_by_id(net, cfg->fc_nh_id); + if (!nh) { + NL_SET_ERR_MSG(extack, "Nexthop id does not exist"); + goto out; + } + err = fib6_check_nexthop(nh, cfg, extack); + if (err) + goto out; + } err = -ENOBUFS; if (cfg->fc_nlinfo.nlh && @@ -3762,6 +3772,30 @@ static int ip6_del_cached_rt(struct fib6_config *cfg, struct fib6_info *rt, return 0; } +struct fib6_nh_del_cached_rt_arg { + struct fib6_config *cfg; + struct fib6_info *f6i; +}; + +static int fib6_nh_del_cached_rt(struct fib6_nh *nh, void *_arg) +{ + struct fib6_nh_del_cached_rt_arg *arg = _arg; + int rc; + + rc = ip6_del_cached_rt(arg->cfg, arg->f6i, nh); + return rc != -ESRCH ? rc : 0; +} + +static int ip6_del_cached_rt_nh(struct fib6_config *cfg, struct fib6_info *f6i) +{ + struct fib6_nh_del_cached_rt_arg arg = { + .cfg = cfg, + .f6i = f6i + }; + + return nexthop_for_each_fib6_nh(f6i->nh, fib6_nh_del_cached_rt, &arg); +} + static int ip6_route_del(struct fib6_config *cfg, struct netlink_ext_ack *extack) { @@ -3787,11 +3821,20 @@ static int ip6_route_del(struct fib6_config *cfg, for_each_fib6_node_rt_rcu(fn) { struct fib6_nh *nh; - nh = rt->fib6_nh; - if (cfg->fc_flags & RTF_CACHE) { - int rc; + if (rt->nh && rt->nh->id != cfg->fc_nh_id) + continue; - rc = ip6_del_cached_rt(cfg, rt, nh); + if (cfg->fc_flags & RTF_CACHE) { + int rc = 0; + + if (rt->nh) { + rc = ip6_del_cached_rt_nh(cfg, rt); + } else if (cfg->fc_nh_id) { + continue; + } else { + nh = rt->fib6_nh; + rc = ip6_del_cached_rt(cfg, rt, nh); + } if (rc != -ESRCH) { rcu_read_unlock(); return rc; @@ -3799,6 +3842,23 @@ static int ip6_route_del(struct fib6_config *cfg, continue; } + if (cfg->fc_metric && cfg->fc_metric != rt->fib6_metric) + continue; + if (cfg->fc_protocol && + cfg->fc_protocol != rt->fib6_protocol) + continue; + + if (rt->nh) { + if (!fib6_info_hold_safe(rt)) + continue; + rcu_read_unlock(); + + return __ip6_del_rt(rt, &cfg->fc_nlinfo); + } + if (cfg->fc_nh_id) + continue; + + nh = rt->fib6_nh; if (cfg->fc_ifindex && (!nh->fib_nh_dev || nh->fib_nh_dev->ifindex != cfg->fc_ifindex)) @@ -3806,10 +3866,6 @@ static int ip6_route_del(struct fib6_config *cfg, if (cfg->fc_flags & RTF_GATEWAY && !ipv6_addr_equal(&cfg->fc_gateway, &nh->fib_nh_gw6)) continue; - if (cfg->fc_metric && cfg->fc_metric != rt->fib6_metric) - continue; - if (cfg->fc_protocol && cfg->fc_protocol != rt->fib6_protocol) - continue; if (!fib6_info_hold_safe(rt)) continue; rcu_read_unlock(); @@ -4709,6 +4765,7 @@ static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { [RTA_IP_PROTO] = { .type = NLA_U8 }, [RTA_SPORT] = { .type = NLA_U16 }, [RTA_DPORT] = { .type = NLA_U16 }, + [RTA_NH_ID] = { .type = NLA_U32 }, }; static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, @@ -4755,6 +4812,16 @@ static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, cfg->fc_flags |= (rtm->rtm_flags & RTNH_F_ONLINK); + if (tb[RTA_NH_ID]) { + if (tb[RTA_GATEWAY] || tb[RTA_OIF] || + tb[RTA_MULTIPATH] || tb[RTA_ENCAP]) { + NL_SET_ERR_MSG(extack, + "Nexthop specification and nexthop id are mutually exclusive"); + goto errout; + } + cfg->fc_nh_id = nla_get_u32(tb[RTA_NH_ID]); + } + if (tb[RTA_GATEWAY]) { cfg->fc_gateway = nla_get_in6_addr(tb[RTA_GATEWAY]); cfg->fc_flags |= RTF_GATEWAY; @@ -5089,6 +5156,12 @@ static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, if (err < 0) return err; + if (cfg.fc_nh_id && + !nexthop_find_by_id(sock_net(skb->sk), cfg.fc_nh_id)) { + NL_SET_ERR_MSG(extack, "Nexthop id does not exist"); + return -EINVAL; + } + if (cfg.fc_mp) return ip6_route_multipath_del(&cfg, extack); else { |