diff options
Diffstat (limited to 'net/ipv6/addrconf.c')
| -rw-r--r-- | net/ipv6/addrconf.c | 527 |
1 files changed, 305 insertions, 222 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 1b5ea3379d9bc..89019bf59f465 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -170,7 +170,7 @@ static void addrconf_type_change(struct net_device *dev, unsigned long event); static int addrconf_ifdown(struct net_device *dev, int how); -static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, +static struct fib6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, int plen, const struct net_device *dev, u32 flags, u32 noflags); @@ -916,7 +916,6 @@ void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp) pr_warn("Freeing alive inet6 address %p\n", ifp); return; } - ip6_rt_put(ifp->rt); kfree_rcu(ifp, rcu); } @@ -987,17 +986,15 @@ static int ipv6_add_addr_hash(struct net_device *dev, struct inet6_ifaddr *ifa) /* On success it returns ifp with increased reference count */ static struct inet6_ifaddr * -ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, - const struct in6_addr *peer_addr, int pfxlen, - int scope, u32 flags, u32 valid_lft, u32 prefered_lft, +ipv6_add_addr(struct inet6_dev *idev, struct ifa6_config *cfg, bool can_block, struct netlink_ext_ack *extack) { gfp_t gfp_flags = can_block ? GFP_KERNEL : GFP_ATOMIC; + int addr_type = ipv6_addr_type(cfg->pfx); struct net *net = dev_net(idev->dev); struct inet6_ifaddr *ifa = NULL; - struct rt6_info *rt = NULL; + struct fib6_info *f6i = NULL; int err = 0; - int addr_type = ipv6_addr_type(addr); if (addr_type == IPV6_ADDR_ANY || addr_type & IPV6_ADDR_MULTICAST || @@ -1020,7 +1017,7 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, */ if (can_block) { struct in6_validator_info i6vi = { - .i6vi_addr = *addr, + .i6vi_addr = *cfg->pfx, .i6vi_dev = idev, .extack = extack, }; @@ -1037,38 +1034,39 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, goto out; } - rt = addrconf_dst_alloc(idev, addr, false); - if (IS_ERR(rt)) { - err = PTR_ERR(rt); - rt = NULL; + f6i = addrconf_f6i_alloc(net, idev, cfg->pfx, false, gfp_flags); + if (IS_ERR(f6i)) { + err = PTR_ERR(f6i); + f6i = NULL; goto out; } if (net->ipv6.devconf_all->disable_policy || idev->cnf.disable_policy) - rt->dst.flags |= DST_NOPOLICY; + f6i->dst_nopolicy = true; neigh_parms_data_state_setall(idev->nd_parms); - ifa->addr = *addr; - if (peer_addr) - ifa->peer_addr = *peer_addr; + ifa->addr = *cfg->pfx; + if (cfg->peer_pfx) + ifa->peer_addr = *cfg->peer_pfx; spin_lock_init(&ifa->lock); INIT_DELAYED_WORK(&ifa->dad_work, addrconf_dad_work); INIT_HLIST_NODE(&ifa->addr_lst); - ifa->scope = scope; - ifa->prefix_len = pfxlen; - ifa->flags = flags; + ifa->scope = cfg->scope; + ifa->prefix_len = cfg->plen; + ifa->rt_priority = cfg->rt_priority; + ifa->flags = cfg->ifa_flags; /* No need to add the TENTATIVE flag for addresses with NODAD */ - if (!(flags & IFA_F_NODAD)) + if (!(cfg->ifa_flags & IFA_F_NODAD)) ifa->flags |= IFA_F_TENTATIVE; - ifa->valid_lft = valid_lft; - ifa->prefered_lft = prefered_lft; + ifa->valid_lft = cfg->valid_lft; + ifa->prefered_lft = cfg->preferred_lft; ifa->cstamp = ifa->tstamp = jiffies; ifa->tokenized = false; - ifa->rt = rt; + ifa->rt = f6i; ifa->idev = idev; in6_dev_hold(idev); @@ -1102,8 +1100,8 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, inet6addr_notifier_call_chain(NETDEV_UP, ifa); out: if (unlikely(err < 0)) { - if (rt) - ip6_rt_put(rt); + fib6_info_release(f6i); + if (ifa) { if (ifa->idev) in6_dev_put(ifa->idev); @@ -1179,19 +1177,19 @@ check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires) static void cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_rt) { - struct rt6_info *rt; + struct fib6_info *f6i; - rt = addrconf_get_prefix_route(&ifp->addr, + f6i = addrconf_get_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, 0, RTF_GATEWAY | RTF_DEFAULT); - if (rt) { + if (f6i) { if (del_rt) - ip6_del_rt(rt); + ip6_del_rt(dev_net(ifp->idev->dev), f6i); else { - if (!(rt->rt6i_flags & RTF_EXPIRES)) - rt6_set_expires(rt, expires); - ip6_rt_put(rt); + if (!(f6i->fib6_flags & RTF_EXPIRES)) + fib6_set_expires(f6i, expires); + fib6_info_release(f6i); } } } @@ -1261,11 +1259,10 @@ static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, { struct inet6_dev *idev = ifp->idev; struct in6_addr addr, *tmpaddr; - unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age; + unsigned long tmp_tstamp, age; unsigned long regen_advance; - int tmp_plen; + struct ifa6_config cfg; int ret = 0; - u32 addr_flags; unsigned long now = jiffies; long max_desync_factor; s32 cnf_temp_preferred_lft; @@ -1327,13 +1324,12 @@ retry: } } - tmp_valid_lft = min_t(__u32, - ifp->valid_lft, + cfg.valid_lft = min_t(__u32, ifp->valid_lft, idev->cnf.temp_valid_lft + age); - tmp_prefered_lft = cnf_temp_preferred_lft + age - - idev->desync_factor; - tmp_prefered_lft = min_t(__u32, ifp->prefered_lft, tmp_prefered_lft); - tmp_plen = ifp->prefix_len; + cfg.preferred_lft = cnf_temp_preferred_lft + age - idev->desync_factor; + cfg.preferred_lft = min_t(__u32, ifp->prefered_lft, cfg.preferred_lft); + + cfg.plen = ifp->prefix_len; tmp_tstamp = ifp->tstamp; spin_unlock_bh(&ifp->lock); @@ -1347,21 +1343,23 @@ retry: * temporary addresses being generated. */ age = (now - tmp_tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ; - if (tmp_prefered_lft <= regen_advance + age) { + if (cfg.preferred_lft <= regen_advance + age) { in6_ifa_put(ifp); in6_dev_put(idev); ret = -1; goto out; } - addr_flags = IFA_F_TEMPORARY; + cfg.ifa_flags = IFA_F_TEMPORARY; /* set in addrconf_prefix_rcv() */ if (ifp->flags & IFA_F_OPTIMISTIC) - addr_flags |= IFA_F_OPTIMISTIC; + cfg.ifa_flags |= IFA_F_OPTIMISTIC; - ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen, - ipv6_addr_scope(&addr), addr_flags, - tmp_valid_lft, tmp_prefered_lft, block, NULL); + cfg.pfx = &addr; + cfg.scope = ipv6_addr_scope(cfg.pfx); + cfg.rt_priority = 0; + + ift = ipv6_add_addr(idev, &cfg, block, NULL); if (IS_ERR(ift)) { in6_ifa_put(ifp); in6_dev_put(idev); @@ -2032,13 +2030,17 @@ void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp) spin_lock_bh(&ifp->lock); if (ifp->flags & IFA_F_STABLE_PRIVACY) { - int scope = ifp->scope; - u32 flags = ifp->flags; struct in6_addr new_addr; struct inet6_ifaddr *ifp2; - u32 valid_lft, preferred_lft; - int pfxlen = ifp->prefix_len; int retries = ifp->stable_privacy_retry + 1; + struct ifa6_config cfg = { + .pfx = &new_addr, + .plen = ifp->prefix_len, + .ifa_flags = ifp->flags, + .valid_lft = ifp->valid_lft, + .preferred_lft = ifp->prefered_lft, + .scope = ifp->scope, + }; if (retries > net->ipv6.sysctl.idgen_retries) { net_info_ratelimited("%s: privacy stable address generation failed because of DAD conflicts!\n", @@ -2051,9 +2053,6 @@ void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp) idev)) goto errdad; - valid_lft = ifp->valid_lft; - preferred_lft = ifp->prefered_lft; - spin_unlock_bh(&ifp->lock); if (idev->cnf.max_addresses && @@ -2064,9 +2063,7 @@ void addrconf_dad_failure(struct sk_buff *skb, struct inet6_ifaddr *ifp) net_info_ratelimited("%s: generating new stable privacy address because of DAD conflict\n", ifp->idev->dev->name); - ifp2 = ipv6_add_addr(idev, &new_addr, NULL, pfxlen, - scope, flags, valid_lft, - preferred_lft, false, NULL); + ifp2 = ipv6_add_addr(idev, &cfg, false, NULL); if (IS_ERR(ifp2)) goto lock_errdad; @@ -2254,6 +2251,7 @@ static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) return addrconf_ifid_ieee1394(eui, dev); case ARPHRD_TUNNEL6: case ARPHRD_IP6GRE: + case ARPHRD_RAWIP: return addrconf_ifid_ip6tnl(eui, dev); } return -1; @@ -2319,18 +2317,20 @@ static void ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpad */ static void -addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, - unsigned long expires, u32 flags) +addrconf_prefix_route(struct in6_addr *pfx, int plen, u32 metric, + struct net_device *dev, unsigned long expires, + u32 flags, gfp_t gfp_flags) { struct fib6_config cfg = { .fc_table = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX, - .fc_metric = IP6_RT_PRIO_ADDRCONF, + .fc_metric = metric ? : IP6_RT_PRIO_ADDRCONF, .fc_ifindex = dev->ifindex, .fc_expires = expires, .fc_dst_len = plen, .fc_flags = RTF_UP | flags, .fc_nlinfo.nl_net = dev_net(dev), .fc_protocol = RTPROT_KERNEL, + .fc_type = RTN_UNICAST, }; cfg.fc_dst = *pfx; @@ -2344,17 +2344,17 @@ addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev, cfg.fc_flags |= RTF_NONEXTHOP; #endif - ip6_route_add(&cfg, NULL); + ip6_route_add(&cfg, gfp_flags, NULL); } -static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, +static struct fib6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, int plen, const struct net_device *dev, u32 flags, u32 noflags) { struct fib6_node *fn; - struct rt6_info *rt = NULL; + struct fib6_info *rt = NULL; struct fib6_table *table; u32 tb_id = l3mdev_fib_table(dev) ? : RT6_TABLE_PREFIX; @@ -2368,14 +2368,13 @@ static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx, goto out; for_each_fib6_node_rt_rcu(fn) { - if (rt->dst.dev->ifindex != dev->ifindex) + if (rt->fib6_nh.nh_dev->ifindex != dev->ifindex) continue; - if ((rt->rt6i_flags & flags) != flags) + if ((rt->fib6_flags & flags) != flags) continue; - if ((rt->rt6i_flags & noflags) != 0) + if ((rt->fib6_flags & noflags) != 0) continue; - if (!dst_hold_safe(&rt->dst)) - rt = NULL; + fib6_info_hold(rt); break; } out: @@ -2394,12 +2393,13 @@ static void addrconf_add_mroute(struct net_device *dev) .fc_ifindex = dev->ifindex, .fc_dst_len = 8, .fc_flags = RTF_UP, + .fc_type = RTN_UNICAST, .fc_nlinfo.nl_net = dev_net(dev), }; ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0); - ip6_route_add(&cfg, NULL); + ip6_route_add(&cfg, GFP_ATOMIC, NULL); } static struct inet6_dev *addrconf_add_dev(struct net_device *dev) @@ -2507,12 +2507,20 @@ int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, if (!ifp && valid_lft) { int max_addresses = in6_dev->cnf.max_addresses; + struct ifa6_config cfg = { + .pfx = addr, + .plen = pinfo->prefix_len, + .ifa_flags = addr_flags, + .valid_lft = valid_lft, + .preferred_lft = prefered_lft, + .scope = addr_type & IPV6_ADDR_SCOPE_MASK, + }; #ifdef CONFIG_IPV6_OPTIMISTIC_DAD if ((net->ipv6.devconf_all->optimistic_dad || in6_dev->cnf.optimistic_dad) && !net->ipv6.devconf_all->forwarding && sllao) - addr_flags |= IFA_F_OPTIMISTIC; + cfg.ifa_flags |= IFA_F_OPTIMISTIC; #endif /* Do not allow to create too much of autoconfigured @@ -2520,16 +2528,11 @@ int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, */ if (!max_addresses || ipv6_count_addresses(in6_dev) < max_addresses) - ifp = ipv6_add_addr(in6_dev, addr, NULL, - pinfo->prefix_len, - addr_type&IPV6_ADDR_SCOPE_MASK, - addr_flags, valid_lft, - prefered_lft, false, NULL); + ifp = ipv6_add_addr(in6_dev, &cfg, false, NULL); if (IS_ERR_OR_NULL(ifp)) return -1; - update_lft = 0; create = 1; spin_lock_bh(&ifp->lock); ifp->flags |= IFA_F_MANAGETEMPADDR; @@ -2551,7 +2554,7 @@ int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ; else stored_lft = 0; - if (!update_lft && !create && stored_lft) { + if (!create && stored_lft) { const u32 minimum_lft = min_t(u32, stored_lft, MIN_VALID_LIFETIME); valid_lft = max(valid_lft, minimum_lft); @@ -2642,7 +2645,7 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) */ if (pinfo->onlink) { - struct rt6_info *rt; + struct fib6_info *rt; unsigned long rt_expires; /* Avoid arithmetic overflow. Really, we could @@ -2667,13 +2670,13 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) if (rt) { /* Autoconf prefix route */ if (valid_lft == 0) { - ip6_del_rt(rt); + ip6_del_rt(net, rt); rt = NULL; } else if (addrconf_finite_timeout(rt_expires)) { /* not infinity */ - rt6_set_expires(rt, jiffies + rt_expires); + fib6_set_expires(rt, jiffies + rt_expires); } else { - rt6_clean_expires(rt); + fib6_clean_expires(rt); } } else if (valid_lft) { clock_t expires = 0; @@ -2684,9 +2687,10 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) expires = jiffies_to_clock_t(rt_expires); } addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len, - dev, expires, flags); + 0, dev, expires, flags, + GFP_ATOMIC); } - ip6_rt_put(rt); + fib6_info_release(rt); } /* Try to figure out our local address for this prefix */ @@ -2831,10 +2835,7 @@ static int ipv6_mc_config(struct sock *sk, bool join, * Manual configuration of address on an interface */ static int inet6_addr_add(struct net *net, int ifindex, - const struct in6_addr *pfx, - const struct in6_addr *peer_pfx, - unsigned int plen, __u32 ifa_flags, - __u32 prefered_lft, __u32 valid_lft, + struct ifa6_config *cfg, struct netlink_ext_ack *extack) { struct inet6_ifaddr *ifp; @@ -2842,19 +2843,18 @@ static int inet6_addr_add(struct net *net, int ifindex, struct net_device *dev; unsigned long timeout; clock_t expires; - int scope; u32 flags; ASSERT_RTNL(); - if (plen > 128) + if (cfg->plen > 128) return -EINVAL; /* check the lifetime */ - if (!valid_lft || prefered_lft > valid_lft) + if (!cfg->valid_lft || cfg->preferred_lft > cfg->valid_lft) return -EINVAL; - if (ifa_flags & IFA_F_MANAGETEMPADDR && plen != 64) + if (cfg->ifa_flags & IFA_F_MANAGETEMPADDR && cfg->plen != 64) return -EINVAL; dev = __dev_get_by_index(net, ifindex); @@ -2865,58 +2865,62 @@ static int inet6_addr_add(struct net *net, int ifindex, if (IS_ERR(idev)) return PTR_ERR(idev); - if (ifa_flags & IFA_F_MCAUTOJOIN) { + if (cfg->ifa_flags & IFA_F_MCAUTOJOIN) { int ret = ipv6_mc_config(net->ipv6.mc_autojoin_sk, - true, pfx, ifindex); + true, cfg->pfx, ifindex); if (ret < 0) return ret; } - scope = ipv6_addr_scope(pfx); + cfg->scope = ipv6_addr_scope(cfg->pfx); - timeout = addrconf_timeout_fixup(valid_lft, HZ); + timeout = addrconf_timeout_fixup(cfg->valid_lft, HZ); if (addrconf_finite_timeout(timeout)) { expires = jiffies_to_clock_t(timeout * HZ); - valid_lft = timeout; + cfg->valid_lft = timeout; flags = RTF_EXPIRES; } else { expires = 0; flags = 0; - ifa_flags |= IFA_F_PERMANENT; + cfg->ifa_flags |= IFA_F_PERMANENT; } - timeout = addrconf_timeout_fixup(prefered_lft, HZ); + timeout = addrconf_timeout_fixup(cfg->preferred_lft, HZ); if (addrconf_finite_timeout(timeout)) { if (timeout == 0) - ifa_flags |= IFA_F_DEPRECATED; - prefered_lft = timeout; + cfg->ifa_flags |= IFA_F_DEPRECATED; + cfg->preferred_lft = timeout; } - ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags, - valid_lft, prefered_lft, true, extack); - + ifp = ipv6_add_addr(idev, cfg, true, extack); if (!IS_ERR(ifp)) { - if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { - addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, - expires, flags); + if (!(cfg->ifa_flags & IFA_F_NOPREFIXROUTE)) { + addrconf_prefix_route(&ifp->addr, ifp->prefix_len, + ifp->rt_priority, dev, expires, + flags, GFP_KERNEL); } + /* Send a netlink notification if DAD is enabled and + * optimistic flag is not set + */ + if (!(ifp->flags & (IFA_F_OPTIMISTIC | IFA_F_NODAD))) + ipv6_ifa_notify(0, ifp); /* * Note that section 3.1 of RFC 4429 indicates * that the Optimistic flag should not be set for * manually configured addresses */ addrconf_dad_start(ifp); - if (ifa_flags & IFA_F_MANAGETEMPADDR) - manage_tempaddrs(idev, ifp, valid_lft, prefered_lft, - true, jiffies); + if (cfg->ifa_flags & IFA_F_MANAGETEMPADDR) + manage_tempaddrs(idev, ifp, cfg->valid_lft, + cfg->preferred_lft, true, jiffies); in6_ifa_put(ifp); addrconf_verify_rtnl(); return 0; - } else if (ifa_flags & IFA_F_MCAUTOJOIN) { - ipv6_mc_config(net->ipv6.mc_autojoin_sk, - false, pfx, ifindex); + } else if (cfg->ifa_flags & IFA_F_MCAUTOJOIN) { + ipv6_mc_config(net->ipv6.mc_autojoin_sk, false, + cfg->pfx, ifindex); } return PTR_ERR(ifp); @@ -2967,6 +2971,11 @@ static int inet6_addr_del(struct net *net, int ifindex, u32 ifa_flags, int addrconf_add_ifaddr(struct net *net, void __user *arg) { + struct ifa6_config cfg = { + .ifa_flags = IFA_F_PERMANENT, + .preferred_lft = INFINITY_LIFE_TIME, + .valid_lft = INFINITY_LIFE_TIME, + }; struct in6_ifreq ireq; int err; @@ -2976,10 +2985,11 @@ int addrconf_add_ifaddr(struct net *net, void __user *arg) if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq))) return -EFAULT; + cfg.pfx = &ireq.ifr6_addr; + cfg.plen = ireq.ifr6_prefixlen; + rtnl_lock(); - err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL, - ireq.ifr6_prefixlen, IFA_F_PERMANENT, - INFINITY_LIFE_TIME, INFINITY_LIFE_TIME, NULL); + err = inet6_addr_add(net, ireq.ifr6_ifindex, &cfg, NULL); rtnl_unlock(); return err; } @@ -3006,11 +3016,16 @@ static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int plen, int scope) { struct inet6_ifaddr *ifp; + struct ifa6_config cfg = { + .pfx = addr, + .plen = plen, + .ifa_flags = IFA_F_PERMANENT, + .valid_lft = INFINITY_LIFE_TIME, + .preferred_lft = INFINITY_LIFE_TIME, + .scope = scope + }; - ifp = ipv6_add_addr(idev, addr, NULL, plen, - scope, IFA_F_PERMANENT, - INFINITY_LIFE_TIME, INFINITY_LIFE_TIME, - true, NULL); + ifp = ipv6_add_addr(idev, &cfg, true, NULL); if (!IS_ERR(ifp)) { spin_lock_bh(&ifp->lock); ifp->flags &= ~IFA_F_TENTATIVE; @@ -3047,7 +3062,8 @@ static void sit_add_v4_addrs(struct inet6_dev *idev) if (addr.s6_addr32[3]) { add_addr(idev, &addr, plen, scope); - addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags); + addrconf_prefix_route(&addr, plen, 0, idev->dev, 0, pflags, + GFP_ATOMIC); return; } @@ -3071,8 +3087,8 @@ static void sit_add_v4_addrs(struct inet6_dev *idev) } add_addr(idev, &addr, plen, flag); - addrconf_prefix_route(&addr, plen, idev->dev, 0, - pflags); + addrconf_prefix_route(&addr, plen, 0, idev->dev, + 0, pflags, GFP_ATOMIC); } } } @@ -3099,20 +3115,27 @@ static void init_loopback(struct net_device *dev) void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr, u32 flags) { + struct ifa6_config cfg = { + .pfx = addr, + .plen = 64, + .ifa_flags = flags | IFA_F_PERMANENT, + .valid_lft = INFINITY_LIFE_TIME, + .preferred_lft = INFINITY_LIFE_TIME, + .scope = IFA_LINK + }; struct inet6_ifaddr *ifp; - u32 addr_flags = flags | IFA_F_PERMANENT; #ifdef CONFIG_IPV6_OPTIMISTIC_DAD if ((dev_net(idev->dev)->ipv6.devconf_all->optimistic_dad || idev->cnf.optimistic_dad) && !dev_net(idev->dev)->ipv6.devconf_all->forwarding) - addr_flags |= IFA_F_OPTIMISTIC; + cfg.ifa_flags |= IFA_F_OPTIMISTIC; #endif - ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, - INFINITY_LIFE_TIME, INFINITY_LIFE_TIME, true, NULL); + ifp = ipv6_add_addr(idev, &cfg, true, NULL); if (!IS_ERR(ifp)) { - addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0); + addrconf_prefix_route(&ifp->addr, ifp->prefix_len, 0, idev->dev, + 0, 0, GFP_ATOMIC); addrconf_dad_start(ifp); in6_ifa_put(ifp); } @@ -3227,7 +3250,8 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) addrconf_add_linklocal(idev, &addr, IFA_F_STABLE_PRIVACY); else if (prefix_route) - addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); + addrconf_prefix_route(&addr, 64, 0, idev->dev, + 0, 0, GFP_KERNEL); break; case IN6_ADDR_GEN_MODE_EUI64: /* addrconf_add_linklocal also adds a prefix_route and we @@ -3237,7 +3261,8 @@ static void addrconf_addr_gen(struct inet6_dev *idev, bool prefix_route) if (ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) == 0) addrconf_add_linklocal(idev, &addr, 0); else if (prefix_route) - addrconf_prefix_route(&addr, 64, idev->dev, 0, 0); + addrconf_prefix_route(&addr, 64, 0, idev->dev, + 0, 0, GFP_KERNEL); break; case IN6_ADDR_GEN_MODE_NONE: default: @@ -3262,7 +3287,8 @@ static void addrconf_dev_config(struct net_device *dev) (dev->type != ARPHRD_IP6GRE) && (dev->type != ARPHRD_IPGRE) && (dev->type != ARPHRD_TUNNEL) && - (dev->type != ARPHRD_NONE)) { + (dev->type != ARPHRD_NONE) && + (dev->type != ARPHRD_RAWIP)) { /* Alas, we support only Ethernet autoconfiguration. */ return; } @@ -3329,32 +3355,35 @@ static void addrconf_gre_config(struct net_device *dev) } #endif -static int fixup_permanent_addr(struct inet6_dev *idev, +static int fixup_permanent_addr(struct net *net, + struct inet6_dev *idev, struct inet6_ifaddr *ifp) { - /* !rt6i_node means the host route was removed from the + /* !fib6_node means the host route was removed from the * FIB, for example, if 'lo' device is taken down. In that * case regenerate the host route. */ - if (!ifp->rt || !ifp->rt->rt6i_node) { - struct rt6_info *rt, *prev; + if (!ifp->rt || !ifp->rt->fib6_node) { + struct fib6_info *f6i, *prev; - rt = addrconf_dst_alloc(idev, &ifp->addr, false); - if (IS_ERR(rt)) - return PTR_ERR(rt); + f6i = addrconf_f6i_alloc(net, idev, &ifp->addr, false, + GFP_ATOMIC); + if (IS_ERR(f6i)) + return PTR_ERR(f6i); /* ifp->rt can be accessed outside of rtnl */ spin_lock(&ifp->lock); prev = ifp->rt; - ifp->rt = rt; + ifp->rt = f6i; spin_unlock(&ifp->lock); - ip6_rt_put(prev); + fib6_info_release(prev); } if (!(ifp->flags & IFA_F_NOPREFIXROUTE)) { addrconf_prefix_route(&ifp->addr, ifp->prefix_len, - idev->dev, 0, 0); + ifp->rt_priority, idev->dev, 0, 0, + GFP_ATOMIC); } if (ifp->state == INET6_IFADDR_STATE_PREDAD) @@ -3363,7 +3392,7 @@ static int fixup_permanent_addr(struct inet6_dev *idev, return 0; } -static void addrconf_permanent_addr(struct net_device *dev) +static void addrconf_permanent_addr(struct net *net, struct net_device *dev) { struct inet6_ifaddr *ifp, *tmp; struct inet6_dev *idev; @@ -3376,7 +3405,7 @@ static void addrconf_permanent_addr(struct net_device *dev) list_for_each_entry_safe(ifp, tmp, &idev->addr_list, if_list) { if ((ifp->flags & IFA_F_PERMANENT) && - fixup_permanent_addr(idev, ifp) < 0) { + fixup_permanent_addr(net, idev, ifp) < 0) { write_unlock_bh(&idev->lock); in6_ifa_hold(ifp); ipv6_del_addr(ifp); @@ -3445,7 +3474,7 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event, if (event == NETDEV_UP) { /* restore routes for permanent addresses */ - addrconf_permanent_addr(dev); + addrconf_permanent_addr(net, dev); if (!addrconf_link_ready(dev)) { /* device is not ready yet. */ @@ -3612,8 +3641,7 @@ static int addrconf_ifdown(struct net_device *dev, int how) struct net *net = dev_net(dev); struct inet6_dev *idev; struct inet6_ifaddr *ifa, *tmp; - int _keep_addr; - bool keep_addr; + bool keep_addr = false; int state, i; ASSERT_RTNL(); @@ -3639,15 +3667,18 @@ static int addrconf_ifdown(struct net_device *dev, int how) } - /* aggregate the system setting and interface setting */ - _keep_addr = net->ipv6.devconf_all->keep_addr_on_down; - if (!_keep_addr) - _keep_addr = idev->cnf.keep_addr_on_down; - /* combine the user config with event to determine if permanent * addresses are to be removed from address hash table */ - keep_addr = !(how || _keep_addr <= 0 || idev->cnf.disable_ipv6); + if (!how && !idev->cnf.disable_ipv6) { + /* aggregate the system setting and interface setting */ + int _keep_addr = net->ipv6.devconf_all->keep_addr_on_down; + + if (!_keep_addr) + _keep_addr = idev->cnf.keep_addr_on_down; + + keep_addr = (_keep_addr > 0); + } /* Step 2: clear hash table */ for (i = 0; i < IN6_ADDR_HSIZE; i++) { @@ -3697,13 +3728,8 @@ restart: write_lock_bh(&idev->lock); } - /* re-combine the user config with event to determine if permanent - * addresses are to be removed from the interface list - */ - keep_addr = (!how && _keep_addr > 0 && !idev->cnf.disable_ipv6); - list_for_each_entry_safe(ifa, tmp, &idev->addr_list, if_list) { - struct rt6_info *rt = NULL; + struct fib6_info *rt = NULL; bool keep; addrconf_del_dad_work(ifa); @@ -3731,7 +3757,7 @@ restart: spin_unlock_bh(&ifa->lock); if (rt) - ip6_del_rt(rt); + ip6_del_rt(net, rt); if (state != INET6_IFADDR_STATE_DEAD) { __ipv6_ifa_notify(RTM_DELADDR, ifa); @@ -3849,6 +3875,7 @@ static void addrconf_dad_begin(struct inet6_ifaddr *ifp) struct inet6_dev *idev = ifp->idev; struct net_device *dev = idev->dev; bool bump_id, notify = false; + struct net *net; addrconf_join_solict(dev, &ifp->addr); @@ -3859,8 +3886,9 @@ static void addrconf_dad_begin(struct inet6_ifaddr *ifp) if (ifp->state == INET6_IFADDR_STATE_DEAD) goto out; + net = dev_net(dev); if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) || - (dev_net(dev)->ipv6.devconf_all->accept_dad < 1 && + (net->ipv6.devconf_all->accept_dad < 1 && idev->cnf.accept_dad < 1) || !(ifp->flags&IFA_F_TENTATIVE) || ifp->flags & IFA_F_NODAD) { @@ -3896,8 +3924,8 @@ static void addrconf_dad_begin(struct inet6_ifaddr *ifp) * Frames right away */ if (ifp->flags & IFA_F_OPTIMISTIC) { - ip6_ins_rt(ifp->rt); - if (ipv6_use_optimistic_addr(dev_net(dev), idev)) { + ip6_ins_rt(net, ifp->rt); + if (ipv6_use_optimistic_addr(net, idev)) { /* Because optimistic nodes can use this address, * notify listeners. If DAD fails, RTM_DELADDR is sent. */ @@ -4463,6 +4491,7 @@ static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = { [IFA_LOCAL] = { .len = sizeof(struct in6_addr) }, [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) }, [IFA_FLAGS] = { .len = sizeof(u32) }, + [IFA_RT_PRIORITY] = { .len = sizeof(u32) }, }; static int @@ -4495,8 +4524,38 @@ inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, ifm->ifa_prefixlen); } -static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, - u32 prefered_lft, u32 valid_lft) +static int modify_prefix_route(struct inet6_ifaddr *ifp, + unsigned long expires, u32 flags) +{ + struct fib6_info *f6i; + + f6i = addrconf_get_prefix_route(&ifp->addr, + ifp->prefix_len, + ifp->idev->dev, + 0, RTF_GATEWAY | RTF_DEFAULT); + if (!f6i) + return -ENOENT; + + if (f6i->fib6_metric != ifp->rt_priority) { + /* add new one */ + addrconf_prefix_route(&ifp->addr, ifp->prefix_len, + ifp->rt_priority, ifp->idev->dev, + expires, flags, GFP_KERNEL); + /* delete old one */ + ip6_del_rt(dev_net(ifp->idev->dev), f6i); + } else { + if (!expires) + fib6_clean_expires(f6i); + else + fib6_set_expires(f6i, expires); + + fib6_info_release(f6i); + } + + return 0; +} + +static int inet6_addr_modify(struct inet6_ifaddr *ifp, struct ifa6_config *cfg) { u32 flags; clock_t expires; @@ -4506,32 +4565,32 @@ static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, ASSERT_RTNL(); - if (!valid_lft || (prefered_lft > valid_lft)) + if (!cfg->valid_lft || cfg->preferred_lft > cfg->valid_lft) return -EINVAL; - if (ifa_flags & IFA_F_MANAGETEMPADDR && + if (cfg->ifa_flags & IFA_F_MANAGETEMPADDR && (ifp->flags & IFA_F_TEMPORARY || ifp->prefix_len != 64)) return -EINVAL; if (!(ifp->flags & IFA_F_TENTATIVE) || ifp->flags & IFA_F_DADFAILED) - ifa_flags &= ~IFA_F_OPTIMISTIC; + cfg->ifa_flags &= ~IFA_F_OPTIMISTIC; - timeout = addrconf_timeout_fixup(valid_lft, HZ); + timeout = addrconf_timeout_fixup(cfg->valid_lft, HZ); if (addrconf_finite_timeout(timeout)) { expires = jiffies_to_clock_t(timeout * HZ); - valid_lft = timeout; + cfg->valid_lft = timeout; flags = RTF_EXPIRES; } else { expires = 0; flags = 0; - ifa_flags |= IFA_F_PERMANENT; + cfg->ifa_flags |= IFA_F_PERMANENT; } - timeout = addrconf_timeout_fixup(prefered_lft, HZ); + timeout = addrconf_timeout_fixup(cfg->preferred_lft, HZ); if (addrconf_finite_timeout(timeout)) { if (timeout == 0) - ifa_flags |= IFA_F_DEPRECATED; - prefered_lft = timeout; + cfg->ifa_flags |= IFA_F_DEPRECATED; + cfg->preferred_lft = timeout; } spin_lock_bh(&ifp->lock); @@ -4541,18 +4600,30 @@ static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, ifp->flags &= ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | IFA_F_NOPREFIXROUTE); - ifp->flags |= ifa_flags; + ifp->flags |= cfg->ifa_flags; ifp->tstamp = jiffies; - ifp->valid_lft = valid_lft; - ifp->prefered_lft = prefered_lft; + ifp->valid_lft = cfg->valid_lft; + ifp->prefered_lft = cfg->preferred_lft; + + if (cfg->rt_priority && cfg->rt_priority != ifp->rt_priority) + ifp->rt_priority = cfg->rt_priority; spin_unlock_bh(&ifp->lock); if (!(ifp->flags&IFA_F_TENTATIVE)) ipv6_ifa_notify(0, ifp); - if (!(ifa_flags & IFA_F_NOPREFIXROUTE)) { - addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev, - expires, flags); + if (!(cfg->ifa_flags & IFA_F_NOPREFIXROUTE)) { + int rc = -ENOENT; + + if (had_prefixroute) + rc = modify_prefix_route(ifp, expires, flags); + + /* prefix route could have been deleted; if so restore it */ + if (rc == -ENOENT) { + addrconf_prefix_route(&ifp->addr, ifp->prefix_len, + ifp->rt_priority, ifp->idev->dev, + expires, flags, GFP_KERNEL); + } } else if (had_prefixroute) { enum cleanup_prefix_rt_t action; unsigned long rt_expires; @@ -4568,10 +4639,14 @@ static int inet6_addr_modify(struct inet6_ifaddr *ifp, u32 ifa_flags, } if (was_managetempaddr || ifp->flags & IFA_F_MANAGETEMPADDR) { - if (was_managetempaddr && !(ifp->flags & IFA_F_MANAGETEMPADDR)) - valid_lft = prefered_lft = 0; - manage_tempaddrs(ifp->idev, ifp, valid_lft, prefered_lft, - !was_managetempaddr, jiffies); + if (was_managetempaddr && + !(ifp->flags & IFA_F_MANAGETEMPADDR)) { + cfg->valid_lft = 0; + cfg->preferred_lft = 0; + } + manage_tempaddrs(ifp->idev, ifp, cfg->valid_lft, + cfg->preferred_lft, !was_managetempaddr, + jiffies); } addrconf_verify_rtnl(); @@ -4586,12 +4661,11 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, struct net *net = sock_net(skb->sk); struct ifaddrmsg *ifm; struct nlattr *tb[IFA_MAX+1]; - struct in6_addr *pfx, *peer_pfx; + struct in6_addr *peer_pfx; struct inet6_ifaddr *ifa; struct net_device *dev; struct inet6_dev *idev; - u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME; - u32 ifa_flags; + struct ifa6_config cfg; int err; err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy, @@ -4599,60 +4673,70 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, if (err < 0) return err; + memset(&cfg, 0, sizeof(cfg)); + ifm = nlmsg_data(nlh); - pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); - if (!pfx) + cfg.pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx); + if (!cfg.pfx) return -EINVAL; + cfg.peer_pfx = peer_pfx; + cfg.plen = ifm->ifa_prefixlen; + if (tb[IFA_RT_PRIORITY]) + cfg.rt_priority = nla_get_u32(tb[IFA_RT_PRIORITY]); + + cfg.valid_lft = INFINITY_LIFE_TIME; + cfg.preferred_lft = INFINITY_LIFE_TIME; + if (tb[IFA_CACHEINFO]) { struct ifa_cacheinfo *ci; ci = nla_data(tb[IFA_CACHEINFO]); - valid_lft = ci->ifa_valid; - preferred_lft = ci->ifa_prefered; - } else { - preferred_lft = INFINITY_LIFE_TIME; - valid_lft = INFINITY_LIFE_TIME; + cfg.valid_lft = ci->ifa_valid; + cfg.preferred_lft = ci->ifa_prefered; } dev = __dev_get_by_index(net, ifm->ifa_index); if (!dev) return -ENODEV; - ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) : ifm->ifa_flags; + if (tb[IFA_FLAGS]) + cfg.ifa_flags = nla_get_u32(tb[IFA_FLAGS]); + else + cfg.ifa_flags = ifm->ifa_flags; /* We ignore other flags so far. */ - ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | IFA_F_MANAGETEMPADDR | - IFA_F_NOPREFIXROUTE | IFA_F_MCAUTOJOIN | IFA_F_OPTIMISTIC; + cfg.ifa_flags &= IFA_F_NODAD | IFA_F_HOMEADDRESS | + IFA_F_MANAGETEMPADDR | IFA_F_NOPREFIXROUTE | + IFA_F_MCAUTOJOIN | IFA_F_OPTIMISTIC; idev = ipv6_find_idev(dev); if (IS_ERR(idev)) return PTR_ERR(idev); if (!ipv6_allow_optimistic_dad(net, idev)) - ifa_flags &= ~IFA_F_OPTIMISTIC; + cfg.ifa_flags &= ~IFA_F_OPTIMISTIC; - if (ifa_flags & IFA_F_NODAD && ifa_flags & IFA_F_OPTIMISTIC) { + if (cfg.ifa_flags & IFA_F_NODAD && + cfg.ifa_flags & IFA_F_OPTIMISTIC) { NL_SET_ERR_MSG(extack, "IFA_F_NODAD and IFA_F_OPTIMISTIC are mutually exclusive"); return -EINVAL; } - ifa = ipv6_get_ifaddr(net, pfx, dev, 1); + ifa = ipv6_get_ifaddr(net, cfg.pfx, dev, 1); if (!ifa) { /* * It would be best to check for !NLM_F_CREATE here but * userspace already relies on not having to provide this. */ - return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx, - ifm->ifa_prefixlen, ifa_flags, - preferred_lft, valid_lft, extack); + return inet6_addr_add(net, ifm->ifa_index, &cfg, extack); } if (nlh->nlmsg_flags & NLM_F_EXCL || !(nlh->nlmsg_flags & NLM_F_REPLACE)) err = -EEXIST; else - err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft); + err = inet6_addr_modify(ifa, &cfg); in6_ifa_put(ifa); @@ -4703,7 +4787,8 @@ static inline int inet6_ifaddr_msgsize(void) + nla_total_size(16) /* IFA_LOCAL */ + nla_total_size(16) /* IFA_ADDRESS */ + nla_total_size(sizeof(struct ifa_cacheinfo)) - + nla_total_size(4) /* IFA_FLAGS */; + + nla_total_size(4) /* IFA_FLAGS */ + + nla_total_size(4) /* IFA_RT_PRIORITY */; } static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, @@ -4749,6 +4834,10 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa, if (nla_put_in6_addr(skb, IFA_ADDRESS, &ifa->addr) < 0) goto error; + if (ifa->rt_priority && + nla_put_u32(skb, IFA_RT_PRIORITY, ifa->rt_priority)) + goto error; + if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) goto error; @@ -4792,9 +4881,10 @@ static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca, static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca, u32 portid, u32 seq, int event, unsigned int flags) { + struct net_device *dev = fib6_info_nh_dev(ifaca->aca_rt); + int ifindex = dev ? dev->ifindex : 1; struct nlmsghdr *nlh; u8 scope = RT_SCOPE_UNIVERSE; - int ifindex = ifaca->aca_idev->dev->ifindex; if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE) scope = RT_SCOPE_SITE; @@ -5017,14 +5107,6 @@ static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa) struct net *net = dev_net(ifa->idev->dev); int err = -ENOBUFS; - /* Don't send DELADDR notification for TENTATIVE address, - * since NEWADDR notification is sent only after removing - * TENTATIVE flag, if DAD has not failed. - */ - if (ifa->flags & IFA_F_TENTATIVE && !(ifa->flags & IFA_F_DADFAILED) && - event == RTM_DELADDR) - return; - skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC); if (!skb) goto errout; @@ -5595,29 +5677,30 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp) * our DAD process, so we don't need * to do it again */ - if (!rcu_access_pointer(ifp->rt->rt6i_node)) - ip6_ins_rt(ifp->rt); + if (!rcu_access_pointer(ifp->rt->fib6_node)) + ip6_ins_rt(net, ifp->rt); if (ifp->idev->cnf.forwarding) addrconf_join_anycast(ifp); if (!ipv6_addr_any(&ifp->peer_addr)) - addrconf_prefix_route(&ifp->peer_addr, 128, - ifp->idev->dev, 0, 0); + addrconf_prefix_route(&ifp->peer_addr, 128, 0, + ifp->idev->dev, 0, 0, + GFP_ATOMIC); break; case RTM_DELADDR: if (ifp->idev->cnf.forwarding) addrconf_leave_anycast(ifp); addrconf_leave_solict(ifp->idev, &ifp->addr); if (!ipv6_addr_any(&ifp->peer_addr)) { - struct rt6_info *rt; + struct fib6_info *rt; rt = addrconf_get_prefix_route(&ifp->peer_addr, 128, ifp->idev->dev, 0, 0); if (rt) - ip6_del_rt(rt); + ip6_del_rt(net, rt); } if (ifp->rt) { - if (dst_hold_safe(&ifp->rt->dst)) - ip6_del_rt(ifp->rt); + ip6_del_rt(net, ifp->rt); + ifp->rt = NULL; } rt_genid_bump_ipv6(net); break; @@ -5964,11 +6047,11 @@ void addrconf_disable_policy_idev(struct inet6_dev *idev, int val) list_for_each_entry(ifa, &idev->addr_list, if_list) { spin_lock(&ifa->lock); if (ifa->rt) { - struct rt6_info *rt = ifa->rt; + struct fib6_info *rt = ifa->rt; int cpu; rcu_read_lock(); - addrconf_set_nopolicy(ifa->rt, val); + ifa->rt->dst_nopolicy = val ? true : false; if (rt->rt6i_pcpu) { for_each_possible_cpu(cpu) { struct rt6_info **rtp; |