From c0a720770c01e67374b15f348f17a52409f6545c Mon Sep 17 00:00:00 2001 From: David Ahern Date: Tue, 2 Apr 2019 14:11:58 -0700 Subject: [PATCH] ipv6: Flip to fib_nexthop_info Export fib_nexthop_info and fib_add_nexthop for use by IPv6 code. Remove rt6_nexthop_info and rt6_add_nexthop in favor of the IPv4 versions. Update fib_nexthop_info for IPv6 linkdown check and RTA_GATEWAY for AF_INET6. Signed-off-by: David Ahern Acked-by: Martin KaFai Lau Signed-off-by: David S. Miller --- include/net/ip_fib.h | 5 +++ net/ipv4/fib_semantics.c | 22 +++++++++--- net/ipv6/route.c | 77 ++++------------------------------------ 3 files changed, 28 insertions(+), 76 deletions(-) diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h index 1f4a3b8bf584..3ce07841dc3b 100644 --- a/include/net/ip_fib.h +++ b/include/net/ip_fib.h @@ -492,4 +492,9 @@ u32 ip_mtu_from_fib_result(struct fib_result *res, __be32 daddr); int ip_valid_fib_dump_req(struct net *net, const struct nlmsghdr *nlh, struct fib_dump_filter *filter, struct netlink_callback *cb); + +int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nh, + unsigned int *flags, bool skip_oif); +int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nh, + int nh_weight); #endif /* _NET_FIB_H */ diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index 33a43965a232..8e0cb1687a74 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -45,6 +45,7 @@ #include #include #include +#include #include "fib_lookup.h" @@ -1317,8 +1318,8 @@ failure: return ERR_PTR(err); } -static int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nhc, - unsigned int *flags, bool skip_oif) +int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nhc, + unsigned int *flags, bool skip_oif) { if (nhc->nhc_flags & RTNH_F_DEAD) *flags |= RTNH_F_DEAD; @@ -1332,6 +1333,10 @@ static int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nhc if (ip_ignore_linkdown(nhc->nhc_dev)) *flags |= RTNH_F_DEAD; break; + case AF_INET6: + if (ip6_ignore_linkdown(nhc->nhc_dev)) + *flags |= RTNH_F_DEAD; + break; } rcu_read_unlock(); } @@ -1342,6 +1347,11 @@ static int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nhc if (nla_put_in_addr(skb, RTA_GATEWAY, nhc->nhc_gw.ipv4)) goto nla_put_failure; break; + case AF_INET6: + if (nla_put_in6_addr(skb, RTA_GATEWAY, + &nhc->nhc_gw.ipv6) < 0) + goto nla_put_failure; + break; } } @@ -1362,10 +1372,11 @@ static int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nhc nla_put_failure: return -EMSGSIZE; } +EXPORT_SYMBOL_GPL(fib_nexthop_info); -#ifdef CONFIG_IP_ROUTE_MULTIPATH -static int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nhc, - int nh_weight) +#if IS_ENABLED(CONFIG_IP_ROUTE_MULTIPATH) || IS_ENABLED(CONFIG_IPV6) +int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nhc, + int nh_weight) { const struct net_device *dev = nhc->nhc_dev; struct rtnexthop *rtnh; @@ -1391,6 +1402,7 @@ static int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nhc, nla_put_failure: return -EMSGSIZE; } +EXPORT_SYMBOL_GPL(fib_add_nexthop); #endif #ifdef CONFIG_IP_ROUTE_MULTIPATH diff --git a/net/ipv6/route.c b/net/ipv6/route.c index e0ee30cbd079..6e89151693d0 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -4582,73 +4582,6 @@ static size_t rt6_nlmsg_size(struct fib6_info *rt) + nexthop_len; } -static int rt6_nexthop_info(struct sk_buff *skb, const struct fib6_nh *fib6_nh, - unsigned int *flags, bool skip_oif) -{ - if (fib6_nh->fib_nh_flags & RTNH_F_DEAD) - *flags |= RTNH_F_DEAD; - - if (fib6_nh->fib_nh_flags & RTNH_F_LINKDOWN) { - *flags |= RTNH_F_LINKDOWN; - - rcu_read_lock(); - if (ip6_ignore_linkdown(fib6_nh->fib_nh_dev)) - *flags |= RTNH_F_DEAD; - rcu_read_unlock(); - } - - if (fib6_nh->fib_nh_has_gw) { - if (nla_put_in6_addr(skb, RTA_GATEWAY, &fib6_nh->fib_nh_gw6) < 0) - goto nla_put_failure; - } - - *flags |= (fib6_nh->fib_nh_flags & RTNH_F_ONLINK); - if (fib6_nh->fib_nh_flags & RTNH_F_OFFLOAD) - *flags |= RTNH_F_OFFLOAD; - - /* not needed for multipath encoding b/c it has a rtnexthop struct */ - if (!skip_oif && fib6_nh->fib_nh_dev && - nla_put_u32(skb, RTA_OIF, fib6_nh->fib_nh_dev->ifindex)) - goto nla_put_failure; - - if (fib6_nh->fib_nh_lws && - lwtunnel_fill_encap(skb, fib6_nh->fib_nh_lws) < 0) - goto nla_put_failure; - - return 0; - -nla_put_failure: - return -EMSGSIZE; -} - -/* add multipath next hop */ -static int rt6_add_nexthop(struct sk_buff *skb, const struct fib6_nh *fib6_nh) -{ - const struct net_device *dev = fib6_nh->fib_nh_dev; - struct rtnexthop *rtnh; - unsigned int flags = 0; - - rtnh = nla_reserve_nohdr(skb, sizeof(*rtnh)); - if (!rtnh) - goto nla_put_failure; - - rtnh->rtnh_hops = fib6_nh->fib_nh_weight - 1; - rtnh->rtnh_ifindex = dev ? dev->ifindex : 0; - - if (rt6_nexthop_info(skb, fib6_nh, &flags, true) < 0) - goto nla_put_failure; - - rtnh->rtnh_flags = flags; - - /* length of rtnetlink header + attributes */ - rtnh->rtnh_len = nlmsg_get_pos(skb) - (void *)rtnh; - - return 0; - -nla_put_failure: - return -EMSGSIZE; -} - static int rt6_fill_node(struct net *net, struct sk_buff *skb, struct fib6_info *rt, struct dst_entry *dst, struct in6_addr *dest, struct in6_addr *src, @@ -4765,19 +4698,21 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb, if (!mp) goto nla_put_failure; - if (rt6_add_nexthop(skb, &rt->fib6_nh) < 0) + if (fib_add_nexthop(skb, &rt->fib6_nh.nh_common, + rt->fib6_nh.fib_nh_weight) < 0) goto nla_put_failure; list_for_each_entry_safe(sibling, next_sibling, &rt->fib6_siblings, fib6_siblings) { - if (rt6_add_nexthop(skb, &sibling->fib6_nh) < 0) + if (fib_add_nexthop(skb, &sibling->fib6_nh.nh_common, + sibling->fib6_nh.fib_nh_weight) < 0) goto nla_put_failure; } nla_nest_end(skb, mp); } else { - if (rt6_nexthop_info(skb, &rt->fib6_nh, &rtm->rtm_flags, - false) < 0) + if (fib_nexthop_info(skb, &rt->fib6_nh.nh_common, + &rtm->rtm_flags, false) < 0) goto nla_put_failure; } -- 2.30.2