From 9fbb704c3385adf5f9adfce7fd3c0bf31aa4da6d Mon Sep 17 00:00:00 2001 From: David Ahern Date: Tue, 13 Mar 2018 08:29:36 -0700 Subject: [PATCH 1/6] net/ipv6: Refactor gateway validation on route add Move gateway validation code from ip6_route_info_create into ip6_validate_gw. Code move plus adjustments to handle the potential reset of dev and idev and to make checkpatch happy. Signed-off-by: David Ahern Reviewed-by: Ido Schimmel Signed-off-by: David S. Miller --- net/ipv6/route.c | 120 ++++++++++++++++++++++++++--------------------- 1 file changed, 66 insertions(+), 54 deletions(-) diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 81711e3e2604..23ced851fdb1 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2550,7 +2550,7 @@ static struct rt6_info *ip6_nh_lookup_table(struct net *net, static int ip6_route_check_nh_onlink(struct net *net, struct fib6_config *cfg, - struct net_device *dev, + const struct net_device *dev, struct netlink_ext_ack *extack) { u32 tbid = l3mdev_fib_table(dev) ? : RT_TABLE_MAIN; @@ -2626,6 +2626,68 @@ static int ip6_route_check_nh(struct net *net, return err; } +static int ip6_validate_gw(struct net *net, struct fib6_config *cfg, + struct net_device **_dev, struct inet6_dev **idev, + struct netlink_ext_ack *extack) +{ + const struct in6_addr *gw_addr = &cfg->fc_gateway; + int gwa_type = ipv6_addr_type(gw_addr); + const struct net_device *dev = *_dev; + int err = -EINVAL; + + /* if gw_addr is local we will fail to detect this in case + * address is still TENTATIVE (DAD in progress). rt6_lookup() + * will return already-added prefix route via interface that + * prefix route was assigned to, which might be non-loopback. + */ + if (ipv6_chk_addr_and_flags(net, gw_addr, + gwa_type & IPV6_ADDR_LINKLOCAL ? + dev : NULL, 0, 0)) { + NL_SET_ERR_MSG(extack, "Invalid gateway address"); + goto out; + } + + if (gwa_type != (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST)) { + /* IPv6 strictly inhibits using not link-local + * addresses as nexthop address. + * Otherwise, router will not able to send redirects. + * It is very good, but in some (rare!) circumstances + * (SIT, PtP, NBMA NOARP links) it is handy to allow + * some exceptions. --ANK + * We allow IPv4-mapped nexthops to support RFC4798-type + * addressing + */ + if (!(gwa_type & (IPV6_ADDR_UNICAST | IPV6_ADDR_MAPPED))) { + NL_SET_ERR_MSG(extack, "Invalid gateway address"); + goto out; + } + + if (cfg->fc_flags & RTNH_F_ONLINK) + err = ip6_route_check_nh_onlink(net, cfg, dev, extack); + else + err = ip6_route_check_nh(net, cfg, _dev, idev); + + if (err) + goto out; + } + + /* reload in case device was changed */ + dev = *_dev; + + err = -EINVAL; + if (!dev) { + NL_SET_ERR_MSG(extack, "Egress device not specified"); + goto out; + } else if (dev->flags & IFF_LOOPBACK) { + NL_SET_ERR_MSG(extack, + "Egress device can not be loopback device for this route"); + goto out; + } + err = 0; +out: + return err; +} + static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg, struct netlink_ext_ack *extack) { @@ -2808,61 +2870,11 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg, } if (cfg->fc_flags & RTF_GATEWAY) { - const struct in6_addr *gw_addr; - int gwa_type; - - gw_addr = &cfg->fc_gateway; - gwa_type = ipv6_addr_type(gw_addr); - - /* if gw_addr is local we will fail to detect this in case - * address is still TENTATIVE (DAD in progress). rt6_lookup() - * will return already-added prefix route via interface that - * prefix route was assigned to, which might be non-loopback. - */ - err = -EINVAL; - if (ipv6_chk_addr_and_flags(net, gw_addr, - gwa_type & IPV6_ADDR_LINKLOCAL ? - dev : NULL, 0, 0)) { - NL_SET_ERR_MSG(extack, "Invalid gateway address"); + err = ip6_validate_gw(net, cfg, &dev, &idev, extack); + if (err) goto out; - } - rt->rt6i_gateway = *gw_addr; - if (gwa_type != (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_UNICAST)) { - /* IPv6 strictly inhibits using not link-local - addresses as nexthop address. - Otherwise, router will not able to send redirects. - It is very good, but in some (rare!) circumstances - (SIT, PtP, NBMA NOARP links) it is handy to allow - some exceptions. --ANK - We allow IPv4-mapped nexthops to support RFC4798-type - addressing - */ - if (!(gwa_type & (IPV6_ADDR_UNICAST | - IPV6_ADDR_MAPPED))) { - NL_SET_ERR_MSG(extack, - "Invalid gateway address"); - goto out; - } - - if (cfg->fc_flags & RTNH_F_ONLINK) { - err = ip6_route_check_nh_onlink(net, cfg, dev, - extack); - } else { - err = ip6_route_check_nh(net, cfg, &dev, &idev); - } - if (err) - goto out; - } - err = -EINVAL; - if (!dev) { - NL_SET_ERR_MSG(extack, "Egress device not specified"); - goto out; - } else if (dev->flags & IFF_LOOPBACK) { - NL_SET_ERR_MSG(extack, - "Egress device can not be loopback device for this route"); - goto out; - } + rt->rt6i_gateway = cfg->fc_gateway; } err = -ENODEV; From 232378e8db4780bc7145d7a0ee47f5f80a41ad6b Mon Sep 17 00:00:00 2001 From: David Ahern Date: Tue, 13 Mar 2018 08:29:37 -0700 Subject: [PATCH 2/6] net/ipv6: Change address check to always take a device argument ipv6_chk_addr_and_flags determines if an address is a local address and optionally if it is an address on a specific device. For example, it is called by ip6_route_info_create to determine if a given gateway address is a local address. The address check currently does not consider L3 domains and as a result does not allow a route to be added in one VRF if the nexthop points to an address in a second VRF. e.g., $ ip route add 2001:db8:1::/64 vrf r2 via 2001:db8:102::23 Error: Invalid gateway address. where 2001:db8:102::23 is an address on an interface in vrf r1. ipv6_chk_addr_and_flags needs to allow callers to always pass in a device with a separate argument to not limit the address to the specific device. The device is used used to determine the L3 domain of interest. To that end add an argument to skip the device check and update callers to always pass a device where possible and use the new argument to mean any address in the domain. Update a handful of users of ipv6_chk_addr with a NULL dev argument. This patch handles the change to these callers without adding the domain check. ip6_validate_gw needs to handle 2 cases - one where the device is given as part of the nexthop spec and the other where the device is resolved. There is at least 1 VRF case where deferring the check to only after the route lookup has resolved the device fails with an unintuitive error "RTNETLINK answers: No route to host" as opposed to the preferred "Error: Gateway can not be a local address." The 'no route to host' error is because of the fallback to a full lookup. The check is done twice to avoid this error. Signed-off-by: David Ahern Reviewed-by: Ido Schimmel Signed-off-by: David S. Miller --- include/net/addrconf.h | 4 ++-- net/ipv6/addrconf.c | 11 ++++++++--- net/ipv6/anycast.c | 9 ++++++--- net/ipv6/datagram.c | 5 +++-- net/ipv6/ip6_tunnel.c | 12 ++++++++---- net/ipv6/ndisc.c | 2 +- net/ipv6/route.c | 19 +++++++++++++++---- 7 files changed, 43 insertions(+), 19 deletions(-) diff --git a/include/net/addrconf.h b/include/net/addrconf.h index c4185a7b0e90..132e5b95167a 100644 --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -69,8 +69,8 @@ int addrconf_set_dstaddr(struct net *net, void __user *arg); int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, const struct net_device *dev, int strict); int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, - const struct net_device *dev, int strict, - u32 banned_flags); + const struct net_device *dev, bool skip_dev_check, + int strict, u32 banned_flags); #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr); diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index b5fd116c046a..0677b9732d56 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -1851,19 +1851,24 @@ static int ipv6_count_addresses(const struct inet6_dev *idev) int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, const struct net_device *dev, int strict) { - return ipv6_chk_addr_and_flags(net, addr, dev, strict, IFA_F_TENTATIVE); + return ipv6_chk_addr_and_flags(net, addr, dev, !dev, + strict, IFA_F_TENTATIVE); } EXPORT_SYMBOL(ipv6_chk_addr); int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, - const struct net_device *dev, int strict, - u32 banned_flags) + const struct net_device *dev, bool skip_dev_check, + int strict, u32 banned_flags) { unsigned int hash = inet6_addr_hash(net, addr); struct inet6_ifaddr *ifp; u32 ifp_flags; rcu_read_lock(); + + if (skip_dev_check) + dev = NULL; + hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { if (!net_eq(dev_net(ifp->idev->dev), net)) continue; diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c index c61718dba2e6..d580d4d456a5 100644 --- a/net/ipv6/anycast.c +++ b/net/ipv6/anycast.c @@ -66,7 +66,11 @@ int ipv6_sock_ac_join(struct sock *sk, int ifindex, const struct in6_addr *addr) return -EPERM; if (ipv6_addr_is_multicast(addr)) return -EINVAL; - if (ipv6_chk_addr(net, addr, NULL, 0)) + + if (ifindex) + dev = __dev_get_by_index(net, ifindex); + + if (ipv6_chk_addr_and_flags(net, addr, dev, true, 0, IFA_F_TENTATIVE)) return -EINVAL; pac = sock_kmalloc(sk, sizeof(struct ipv6_ac_socklist), GFP_KERNEL); @@ -90,8 +94,7 @@ int ipv6_sock_ac_join(struct sock *sk, int ifindex, const struct in6_addr *addr) dev = __dev_get_by_flags(net, IFF_UP, IFF_UP | IFF_LOOPBACK); } - } else - dev = __dev_get_by_index(net, ifindex); + } if (!dev) { err = -ENODEV; diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c index fbf08ce3f5ab..b27333d7b099 100644 --- a/net/ipv6/datagram.c +++ b/net/ipv6/datagram.c @@ -801,8 +801,9 @@ int ip6_datagram_send_ctl(struct net *net, struct sock *sk, if (addr_type != IPV6_ADDR_ANY) { int strict = __ipv6_addr_src_scope(addr_type) <= IPV6_ADDR_SCOPE_LINKLOCAL; if (!(inet_sk(sk)->freebind || inet_sk(sk)->transparent) && - !ipv6_chk_addr(net, &src_info->ipi6_addr, - strict ? dev : NULL, 0) && + !ipv6_chk_addr_and_flags(net, &src_info->ipi6_addr, + dev, !strict, 0, + IFA_F_TENTATIVE) && !ipv6_chk_acast_addr_src(net, dev, &src_info->ipi6_addr)) err = -EINVAL; diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 5c045fa407da..456fcf942f95 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -758,9 +758,11 @@ int ip6_tnl_rcv_ctl(struct ip6_tnl *t, ldev = dev_get_by_index_rcu(net, p->link); if ((ipv6_addr_is_multicast(laddr) || - likely(ipv6_chk_addr(net, laddr, ldev, 0))) && + likely(ipv6_chk_addr_and_flags(net, laddr, ldev, false, + 0, IFA_F_TENTATIVE))) && ((p->flags & IP6_TNL_F_ALLOW_LOCAL_REMOTE) || - likely(!ipv6_chk_addr(net, raddr, NULL, 0)))) + likely(!ipv6_chk_addr_and_flags(net, raddr, ldev, true, + 0, IFA_F_TENTATIVE)))) ret = 1; } return ret; @@ -990,12 +992,14 @@ int ip6_tnl_xmit_ctl(struct ip6_tnl *t, if (p->link) ldev = dev_get_by_index_rcu(net, p->link); - if (unlikely(!ipv6_chk_addr(net, laddr, ldev, 0))) + if (unlikely(!ipv6_chk_addr_and_flags(net, laddr, ldev, false, + 0, IFA_F_TENTATIVE))) pr_warn("%s xmit: Local address not yet configured!\n", p->name); else if (!(p->flags & IP6_TNL_F_ALLOW_LOCAL_REMOTE) && !ipv6_addr_is_multicast(raddr) && - unlikely(ipv6_chk_addr(net, raddr, NULL, 0))) + unlikely(ipv6_chk_addr_and_flags(net, raddr, ldev, + true, 0, IFA_F_TENTATIVE))) pr_warn("%s xmit: Routing loop! Remote address found on this node!\n", p->name); else diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index 8af5eef464c1..10024eb0c521 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -707,7 +707,7 @@ static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb) int probes = atomic_read(&neigh->probes); if (skb && ipv6_chk_addr_and_flags(dev_net(dev), &ipv6_hdr(skb)->saddr, - dev, 1, + dev, false, 1, IFA_F_TENTATIVE|IFA_F_OPTIMISTIC)) saddr = &ipv6_hdr(skb)->saddr; probes -= NEIGH_VAR(neigh->parms, UCAST_PROBES); diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 23ced851fdb1..939d122e71b4 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2632,7 +2632,9 @@ static int ip6_validate_gw(struct net *net, struct fib6_config *cfg, { const struct in6_addr *gw_addr = &cfg->fc_gateway; int gwa_type = ipv6_addr_type(gw_addr); + bool skip_dev = gwa_type & IPV6_ADDR_LINKLOCAL ? false : true; const struct net_device *dev = *_dev; + bool need_addr_check = !dev; int err = -EINVAL; /* if gw_addr is local we will fail to detect this in case @@ -2640,10 +2642,9 @@ static int ip6_validate_gw(struct net *net, struct fib6_config *cfg, * will return already-added prefix route via interface that * prefix route was assigned to, which might be non-loopback. */ - if (ipv6_chk_addr_and_flags(net, gw_addr, - gwa_type & IPV6_ADDR_LINKLOCAL ? - dev : NULL, 0, 0)) { - NL_SET_ERR_MSG(extack, "Invalid gateway address"); + if (dev && + ipv6_chk_addr_and_flags(net, gw_addr, dev, skip_dev, 0, 0)) { + NL_SET_ERR_MSG(extack, "Gateway can not be a local address"); goto out; } @@ -2683,6 +2684,16 @@ static int ip6_validate_gw(struct net *net, struct fib6_config *cfg, "Egress device can not be loopback device for this route"); goto out; } + + /* if we did not check gw_addr above, do so now that the + * egress device has been resolved. + */ + if (need_addr_check && + ipv6_chk_addr_and_flags(net, gw_addr, dev, skip_dev, 0, 0)) { + NL_SET_ERR_MSG(extack, "Gateway can not be a local address"); + goto out; + } + err = 0; out: return err; From 1893ff20275b9b9be4892b5b5785788ce45abdea Mon Sep 17 00:00:00 2001 From: David Ahern Date: Tue, 13 Mar 2018 08:29:38 -0700 Subject: [PATCH 3/6] net/ipv6: Add l3mdev check to ipv6_chk_addr_and_flags Lookup the L3 master device for the passed in device. Only consider addresses on netdev's with the same master device. If the device is not enslaved or is NULL, then the l3mdev is NULL which means only devices not enslaved (ie, in the default domain) are considered. Signed-off-by: David Ahern Reviewed-by: Ido Schimmel Signed-off-by: David S. Miller --- net/ipv6/addrconf.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 0677b9732d56..6fd4bbdc444f 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -1856,22 +1856,37 @@ int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, } EXPORT_SYMBOL(ipv6_chk_addr); +/* device argument is used to find the L3 domain of interest. If + * skip_dev_check is set, then the ifp device is not checked against + * the passed in dev argument. So the 2 cases for addresses checks are: + * 1. does the address exist in the L3 domain that dev is part of + * (skip_dev_check = true), or + * + * 2. does the address exist on the specific device + * (skip_dev_check = false) + */ int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, const struct net_device *dev, bool skip_dev_check, int strict, u32 banned_flags) { unsigned int hash = inet6_addr_hash(net, addr); + const struct net_device *l3mdev; struct inet6_ifaddr *ifp; u32 ifp_flags; rcu_read_lock(); + l3mdev = l3mdev_master_dev_rcu(dev); if (skip_dev_check) dev = NULL; hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { if (!net_eq(dev_net(ifp->idev->dev), net)) continue; + + if (l3mdev_master_dev_rcu(ifp->idev->dev) != l3mdev) + continue; + /* Decouple optimistic from tentative for evaluation here. * Ban optimistic addresses explicitly, when required. */ From 171a48717beeacb66be85c1e8e401111d3a0262c Mon Sep 17 00:00:00 2001 From: David Ahern Date: Tue, 13 Mar 2018 08:29:39 -0700 Subject: [PATCH 4/6] selftests: fib_tests: Use an alias for ip command Replace 'ip -netns testns' with the alias IP. Shortens the line lengths and makes running the commands manually a bit easier. Signed-off-by: David Ahern Signed-off-by: David S. Miller --- tools/testing/selftests/net/fib_tests.sh | 169 ++++++++++++----------- 1 file changed, 85 insertions(+), 84 deletions(-) diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh index b617985ecdc1..953254439e39 100755 --- a/tools/testing/selftests/net/fib_tests.sh +++ b/tools/testing/selftests/net/fib_tests.sh @@ -7,6 +7,7 @@ ret=0 PAUSE_ON_FAIL=${PAUSE_ON_FAIL:=no} +IP="ip -netns testns" log_test() { @@ -32,19 +33,19 @@ setup() { set -e ip netns add testns - ip -netns testns link set dev lo up + $IP link set dev lo up - ip -netns testns link add dummy0 type dummy - ip -netns testns link set dev dummy0 up - ip -netns testns address add 198.51.100.1/24 dev dummy0 - ip -netns testns -6 address add 2001:db8:1::1/64 dev dummy0 + $IP link add dummy0 type dummy + $IP link set dev dummy0 up + $IP address add 198.51.100.1/24 dev dummy0 + $IP -6 address add 2001:db8:1::1/64 dev dummy0 set +e } cleanup() { - ip -netns testns link del dev dummy0 &> /dev/null + $IP link del dev dummy0 &> /dev/null ip netns del testns } @@ -56,19 +57,19 @@ fib_unreg_unicast_test() setup echo " Start point" - ip -netns testns route get fibmatch 198.51.100.2 &> /dev/null + $IP route get fibmatch 198.51.100.2 &> /dev/null log_test $? 0 "IPv4 fibmatch" - ip -netns testns -6 route get fibmatch 2001:db8:1::2 &> /dev/null + $IP -6 route get fibmatch 2001:db8:1::2 &> /dev/null log_test $? 0 "IPv6 fibmatch" set -e - ip -netns testns link del dev dummy0 + $IP link del dev dummy0 set +e echo " Nexthop device deleted" - ip -netns testns route get fibmatch 198.51.100.2 &> /dev/null + $IP route get fibmatch 198.51.100.2 &> /dev/null log_test $? 2 "IPv4 fibmatch - no route" - ip -netns testns -6 route get fibmatch 2001:db8:1::2 &> /dev/null + $IP -6 route get fibmatch 2001:db8:1::2 &> /dev/null log_test $? 2 "IPv6 fibmatch - no route" cleanup @@ -83,43 +84,43 @@ fib_unreg_multipath_test() setup set -e - ip -netns testns link add dummy1 type dummy - ip -netns testns link set dev dummy1 up - ip -netns testns address add 192.0.2.1/24 dev dummy1 - ip -netns testns -6 address add 2001:db8:2::1/64 dev dummy1 + $IP link add dummy1 type dummy + $IP link set dev dummy1 up + $IP address add 192.0.2.1/24 dev dummy1 + $IP -6 address add 2001:db8:2::1/64 dev dummy1 - ip -netns testns route add 203.0.113.0/24 \ + $IP route add 203.0.113.0/24 \ nexthop via 198.51.100.2 dev dummy0 \ nexthop via 192.0.2.2 dev dummy1 - ip -netns testns -6 route add 2001:db8:3::/64 \ + $IP -6 route add 2001:db8:3::/64 \ nexthop via 2001:db8:1::2 dev dummy0 \ nexthop via 2001:db8:2::2 dev dummy1 set +e echo " Start point" - ip -netns testns route get fibmatch 203.0.113.1 &> /dev/null + $IP route get fibmatch 203.0.113.1 &> /dev/null log_test $? 0 "IPv4 fibmatch" - ip -netns testns -6 route get fibmatch 2001:db8:3::1 &> /dev/null + $IP -6 route get fibmatch 2001:db8:3::1 &> /dev/null log_test $? 0 "IPv6 fibmatch" set -e - ip -netns testns link del dev dummy0 + $IP link del dev dummy0 set +e echo " One nexthop device deleted" - ip -netns testns route get fibmatch 203.0.113.1 &> /dev/null + $IP route get fibmatch 203.0.113.1 &> /dev/null log_test $? 2 "IPv4 - multipath route removed on delete" - ip -netns testns -6 route get fibmatch 2001:db8:3::1 &> /dev/null + $IP -6 route get fibmatch 2001:db8:3::1 &> /dev/null # In IPv6 we do not flush the entire multipath route. log_test $? 0 "IPv6 - multipath down to single path" set -e - ip -netns testns link del dev dummy1 + $IP link del dev dummy1 set +e echo " Second nexthop device deleted" - ip -netns testns -6 route get fibmatch 2001:db8:3::1 &> /dev/null + $IP -6 route get fibmatch 2001:db8:3::1 &> /dev/null log_test $? 2 "IPv6 - no route" cleanup @@ -139,19 +140,19 @@ fib_down_unicast_test() setup echo " Start point" - ip -netns testns route get fibmatch 198.51.100.2 &> /dev/null + $IP route get fibmatch 198.51.100.2 &> /dev/null log_test $? 0 "IPv4 fibmatch" - ip -netns testns -6 route get fibmatch 2001:db8:1::2 &> /dev/null + $IP -6 route get fibmatch 2001:db8:1::2 &> /dev/null log_test $? 0 "IPv6 fibmatch" set -e - ip -netns testns link set dev dummy0 down + $IP link set dev dummy0 down set +e echo " Route deleted on down" - ip -netns testns route get fibmatch 198.51.100.2 &> /dev/null + $IP route get fibmatch 198.51.100.2 &> /dev/null log_test $? 2 "IPv4 fibmatch" - ip -netns testns -6 route get fibmatch 2001:db8:1::2 &> /dev/null + $IP -6 route get fibmatch 2001:db8:1::2 &> /dev/null log_test $? 2 "IPv6 fibmatch" cleanup @@ -162,31 +163,31 @@ fib_down_multipath_test_do() local down_dev=$1 local up_dev=$2 - ip -netns testns route get fibmatch 203.0.113.1 \ + $IP route get fibmatch 203.0.113.1 \ oif $down_dev &> /dev/null log_test $? 2 "IPv4 fibmatch on down device" - ip -netns testns -6 route get fibmatch 2001:db8:3::1 \ + $IP -6 route get fibmatch 2001:db8:3::1 \ oif $down_dev &> /dev/null log_test $? 2 "IPv6 fibmatch on down device" - ip -netns testns route get fibmatch 203.0.113.1 \ + $IP route get fibmatch 203.0.113.1 \ oif $up_dev &> /dev/null log_test $? 0 "IPv4 fibmatch on up device" - ip -netns testns -6 route get fibmatch 2001:db8:3::1 \ + $IP -6 route get fibmatch 2001:db8:3::1 \ oif $up_dev &> /dev/null log_test $? 0 "IPv6 fibmatch on up device" - ip -netns testns route get fibmatch 203.0.113.1 | \ + $IP route get fibmatch 203.0.113.1 | \ grep $down_dev | grep -q "dead linkdown" log_test $? 0 "IPv4 flags on down device" - ip -netns testns -6 route get fibmatch 2001:db8:3::1 | \ + $IP -6 route get fibmatch 2001:db8:3::1 | \ grep $down_dev | grep -q "dead linkdown" log_test $? 0 "IPv6 flags on down device" - ip -netns testns route get fibmatch 203.0.113.1 | \ + $IP route get fibmatch 203.0.113.1 | \ grep $up_dev | grep -q "dead linkdown" log_test $? 1 "IPv4 flags on up device" - ip -netns testns -6 route get fibmatch 2001:db8:3::1 | \ + $IP -6 route get fibmatch 2001:db8:3::1 | \ grep $up_dev | grep -q "dead linkdown" log_test $? 1 "IPv6 flags on up device" } @@ -199,53 +200,53 @@ fib_down_multipath_test() setup set -e - ip -netns testns link add dummy1 type dummy - ip -netns testns link set dev dummy1 up + $IP link add dummy1 type dummy + $IP link set dev dummy1 up - ip -netns testns address add 192.0.2.1/24 dev dummy1 - ip -netns testns -6 address add 2001:db8:2::1/64 dev dummy1 + $IP address add 192.0.2.1/24 dev dummy1 + $IP -6 address add 2001:db8:2::1/64 dev dummy1 - ip -netns testns route add 203.0.113.0/24 \ + $IP route add 203.0.113.0/24 \ nexthop via 198.51.100.2 dev dummy0 \ nexthop via 192.0.2.2 dev dummy1 - ip -netns testns -6 route add 2001:db8:3::/64 \ + $IP -6 route add 2001:db8:3::/64 \ nexthop via 2001:db8:1::2 dev dummy0 \ nexthop via 2001:db8:2::2 dev dummy1 set +e echo " Verify start point" - ip -netns testns route get fibmatch 203.0.113.1 &> /dev/null + $IP route get fibmatch 203.0.113.1 &> /dev/null log_test $? 0 "IPv4 fibmatch" - ip -netns testns -6 route get fibmatch 2001:db8:3::1 &> /dev/null + $IP -6 route get fibmatch 2001:db8:3::1 &> /dev/null log_test $? 0 "IPv6 fibmatch" set -e - ip -netns testns link set dev dummy0 down + $IP link set dev dummy0 down set +e echo " One device down, one up" fib_down_multipath_test_do "dummy0" "dummy1" set -e - ip -netns testns link set dev dummy0 up - ip -netns testns link set dev dummy1 down + $IP link set dev dummy0 up + $IP link set dev dummy1 down set +e echo " Other device down and up" fib_down_multipath_test_do "dummy1" "dummy0" set -e - ip -netns testns link set dev dummy0 down + $IP link set dev dummy0 down set +e echo " Both devices down" - ip -netns testns route get fibmatch 203.0.113.1 &> /dev/null + $IP route get fibmatch 203.0.113.1 &> /dev/null log_test $? 2 "IPv4 fibmatch" - ip -netns testns -6 route get fibmatch 2001:db8:3::1 &> /dev/null + $IP -6 route get fibmatch 2001:db8:3::1 &> /dev/null log_test $? 2 "IPv6 fibmatch" - ip -netns testns link del dev dummy1 + $IP link del dev dummy1 cleanup } @@ -264,55 +265,55 @@ fib_carrier_local_test() setup set -e - ip -netns testns link set dev dummy0 carrier on + $IP link set dev dummy0 carrier on set +e echo " Start point" - ip -netns testns route get fibmatch 198.51.100.1 &> /dev/null + $IP route get fibmatch 198.51.100.1 &> /dev/null log_test $? 0 "IPv4 fibmatch" - ip -netns testns -6 route get fibmatch 2001:db8:1::1 &> /dev/null + $IP -6 route get fibmatch 2001:db8:1::1 &> /dev/null log_test $? 0 "IPv6 fibmatch" - ip -netns testns route get fibmatch 198.51.100.1 | \ + $IP route get fibmatch 198.51.100.1 | \ grep -q "linkdown" log_test $? 1 "IPv4 - no linkdown flag" - ip -netns testns -6 route get fibmatch 2001:db8:1::1 | \ + $IP -6 route get fibmatch 2001:db8:1::1 | \ grep -q "linkdown" log_test $? 1 "IPv6 - no linkdown flag" set -e - ip -netns testns link set dev dummy0 carrier off + $IP link set dev dummy0 carrier off sleep 1 set +e echo " Carrier off on nexthop" - ip -netns testns route get fibmatch 198.51.100.1 &> /dev/null + $IP route get fibmatch 198.51.100.1 &> /dev/null log_test $? 0 "IPv4 fibmatch" - ip -netns testns -6 route get fibmatch 2001:db8:1::1 &> /dev/null + $IP -6 route get fibmatch 2001:db8:1::1 &> /dev/null log_test $? 0 "IPv6 fibmatch" - ip -netns testns route get fibmatch 198.51.100.1 | \ + $IP route get fibmatch 198.51.100.1 | \ grep -q "linkdown" log_test $? 1 "IPv4 - linkdown flag set" - ip -netns testns -6 route get fibmatch 2001:db8:1::1 | \ + $IP -6 route get fibmatch 2001:db8:1::1 | \ grep -q "linkdown" log_test $? 1 "IPv6 - linkdown flag set" set -e - ip -netns testns address add 192.0.2.1/24 dev dummy0 - ip -netns testns -6 address add 2001:db8:2::1/64 dev dummy0 + $IP address add 192.0.2.1/24 dev dummy0 + $IP -6 address add 2001:db8:2::1/64 dev dummy0 set +e echo " Route to local address with carrier down" - ip -netns testns route get fibmatch 192.0.2.1 &> /dev/null + $IP route get fibmatch 192.0.2.1 &> /dev/null log_test $? 0 "IPv4 fibmatch" - ip -netns testns -6 route get fibmatch 2001:db8:2::1 &> /dev/null + $IP -6 route get fibmatch 2001:db8:2::1 &> /dev/null log_test $? 0 "IPv6 fibmatch" - ip -netns testns route get fibmatch 192.0.2.1 | \ + $IP route get fibmatch 192.0.2.1 | \ grep -q "linkdown" log_test $? 1 "IPv4 linkdown flag set" - ip -netns testns -6 route get fibmatch 2001:db8:2::1 | \ + $IP -6 route get fibmatch 2001:db8:2::1 | \ grep -q "linkdown" log_test $? 1 "IPv6 linkdown flag set" @@ -329,54 +330,54 @@ fib_carrier_unicast_test() setup set -e - ip -netns testns link set dev dummy0 carrier on + $IP link set dev dummy0 carrier on set +e echo " Start point" - ip -netns testns route get fibmatch 198.51.100.2 &> /dev/null + $IP route get fibmatch 198.51.100.2 &> /dev/null log_test $? 0 "IPv4 fibmatch" - ip -netns testns -6 route get fibmatch 2001:db8:1::2 &> /dev/null + $IP -6 route get fibmatch 2001:db8:1::2 &> /dev/null log_test $? 0 "IPv6 fibmatch" - ip -netns testns route get fibmatch 198.51.100.2 | \ + $IP route get fibmatch 198.51.100.2 | \ grep -q "linkdown" log_test $? 1 "IPv4 no linkdown flag" - ip -netns testns -6 route get fibmatch 2001:db8:1::2 | \ + $IP -6 route get fibmatch 2001:db8:1::2 | \ grep -q "linkdown" log_test $? 1 "IPv6 no linkdown flag" set -e - ip -netns testns link set dev dummy0 carrier off + $IP link set dev dummy0 carrier off set +e echo " Carrier down" - ip -netns testns route get fibmatch 198.51.100.2 &> /dev/null + $IP route get fibmatch 198.51.100.2 &> /dev/null log_test $? 0 "IPv4 fibmatch" - ip -netns testns -6 route get fibmatch 2001:db8:1::2 &> /dev/null + $IP -6 route get fibmatch 2001:db8:1::2 &> /dev/null log_test $? 0 "IPv6 fibmatch" - ip -netns testns route get fibmatch 198.51.100.2 | \ + $IP route get fibmatch 198.51.100.2 | \ grep -q "linkdown" log_test $? 0 "IPv4 linkdown flag set" - ip -netns testns -6 route get fibmatch 2001:db8:1::2 | \ + $IP -6 route get fibmatch 2001:db8:1::2 | \ grep -q "linkdown" log_test $? 0 "IPv6 linkdown flag set" set -e - ip -netns testns address add 192.0.2.1/24 dev dummy0 - ip -netns testns -6 address add 2001:db8:2::1/64 dev dummy0 + $IP address add 192.0.2.1/24 dev dummy0 + $IP -6 address add 2001:db8:2::1/64 dev dummy0 set +e echo " Second address added with carrier down" - ip -netns testns route get fibmatch 192.0.2.2 &> /dev/null + $IP route get fibmatch 192.0.2.2 &> /dev/null log_test $? 0 "IPv4 fibmatch" - ip -netns testns -6 route get fibmatch 2001:db8:2::2 &> /dev/null + $IP -6 route get fibmatch 2001:db8:2::2 &> /dev/null log_test $? 0 "IPv6 fibmatch" - ip -netns testns route get fibmatch 192.0.2.2 | \ + $IP route get fibmatch 192.0.2.2 | \ grep -q "linkdown" log_test $? 0 "IPv4 linkdown flag set" - ip -netns testns -6 route get fibmatch 2001:db8:2::2 | \ + $IP -6 route get fibmatch 2001:db8:2::2 | \ grep -q "linkdown" log_test $? 0 "IPv6 linkdown flag set" From a511858c7536fab15a59a0a2aee14c5a909da23a Mon Sep 17 00:00:00 2001 From: David Ahern Date: Tue, 13 Mar 2018 08:29:40 -0700 Subject: [PATCH 5/6] selftests: fib_tests: Allow user to run a specific test Allow a user to run just a specific fib test by setting the TEST environment variable. Signed-off-by: David Ahern Signed-off-by: David S. Miller --- tools/testing/selftests/net/fib_tests.sh | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh index 953254439e39..cfdeb35bfed5 100755 --- a/tools/testing/selftests/net/fib_tests.sh +++ b/tools/testing/selftests/net/fib_tests.sh @@ -392,9 +392,13 @@ fib_carrier_test() fib_test() { - fib_unreg_test - fib_down_test - fib_carrier_test + if [ -n "$TEST" ]; then + eval $TEST + else + fib_unreg_test + fib_down_test + fib_carrier_test + fi } if [ "$(id -u)" -ne 0 ];then From 654d3a7821e838dd7608d88922d8d3db9bdb95b4 Mon Sep 17 00:00:00 2001 From: David Ahern Date: Tue, 13 Mar 2018 08:29:41 -0700 Subject: [PATCH 6/6] selftests: fib_tests: Add IPv6 nexthop spec tests Add series of tests for valid and invalid nexthop specs for IPv6. $ TEST=fib_nexthop_test ./fib_tests.sh ... IPv6 nexthop tests TEST: Directly connected nexthop, unicast address [ OK ] TEST: Directly connected nexthop, unicast address with device [ OK ] TEST: Gateway is linklocal address [ OK ] TEST: Gateway is linklocal address, no device [ OK ] TEST: Gateway can not be local unicast address [ OK ] TEST: Gateway can not be local unicast address, with device [ OK ] TEST: Gateway can not be a local linklocal address [ OK ] TEST: Gateway can be local address in a VRF [ OK ] TEST: Gateway can be local address in a VRF, with device [ OK ] TEST: Gateway can be local linklocal address in a VRF [ OK ] TEST: Redirect to VRF lookup [ OK ] TEST: VRF route, gateway can be local address in default VRF [ OK ] TEST: VRF route, gateway can not be a local address [ OK ] TEST: VRF route, gateway can not be a local addr with device [ OK ] Signed-off-by: David Ahern Signed-off-by: David S. Miller --- tools/testing/selftests/net/fib_tests.sh | 180 ++++++++++++++++++++++- 1 file changed, 178 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh index cfdeb35bfed5..9164e60d4b66 100755 --- a/tools/testing/selftests/net/fib_tests.sh +++ b/tools/testing/selftests/net/fib_tests.sh @@ -6,6 +6,7 @@ ret=0 +VERBOSE=${VERBOSE:=0} PAUSE_ON_FAIL=${PAUSE_ON_FAIL:=no} IP="ip -netns testns" @@ -16,10 +17,10 @@ log_test() local msg="$3" if [ ${rc} -eq ${expected} ]; then - printf " %-60s [ OK ]\n" "${msg}" + printf " TEST: %-60s [ OK ]\n" "${msg}" else ret=1 - printf " %-60s [FAIL]\n" "${msg}" + printf " TEST: %-60s [FAIL]\n" "${msg}" if [ "${PAUSE_ON_FAIL}" = "yes" ]; then echo echo "hit enter to continue, 'q' to quit" @@ -49,6 +50,28 @@ cleanup() ip netns del testns } +get_linklocal() +{ + local dev=$1 + local addr + + addr=$($IP -6 -br addr show dev ${dev} | \ + awk '{ + for (i = 3; i <= NF; ++i) { + if ($i ~ /^fe80/) + print $i + } + }' + ) + addr=${addr/\/*} + + [ -z "$addr" ] && return 1 + + echo $addr + + return 0 +} + fib_unreg_unicast_test() { echo @@ -390,6 +413,158 @@ fib_carrier_test() fib_carrier_unicast_test } +################################################################################ +# Tests on nexthop spec + +# run 'ip route add' with given spec +add_rt() +{ + local desc="$1" + local erc=$2 + local vrf=$3 + local pfx=$4 + local gw=$5 + local dev=$6 + local cmd out rc + + [ "$vrf" = "-" ] && vrf="default" + [ -n "$gw" ] && gw="via $gw" + [ -n "$dev" ] && dev="dev $dev" + + cmd="$IP route add vrf $vrf $pfx $gw $dev" + if [ "$VERBOSE" = "1" ]; then + printf "\n COMMAND: $cmd\n" + fi + + out=$(eval $cmd 2>&1) + rc=$? + if [ "$VERBOSE" = "1" -a -n "$out" ]; then + echo " $out" + fi + log_test $rc $erc "$desc" +} + +fib4_nexthop() +{ + echo + echo "IPv4 nexthop tests" + + echo "<<< write me >>>" +} + +fib6_nexthop() +{ + local lldummy=$(get_linklocal dummy0) + local llv1=$(get_linklocal dummy0) + + if [ -z "$lldummy" ]; then + echo "Failed to get linklocal address for dummy0" + return 1 + fi + if [ -z "$llv1" ]; then + echo "Failed to get linklocal address for veth1" + return 1 + fi + + echo + echo "IPv6 nexthop tests" + + add_rt "Directly connected nexthop, unicast address" 0 \ + - 2001:db8:101::/64 2001:db8:1::2 + add_rt "Directly connected nexthop, unicast address with device" 0 \ + - 2001:db8:102::/64 2001:db8:1::2 "dummy0" + add_rt "Gateway is linklocal address" 0 \ + - 2001:db8:103::1/64 $llv1 "veth0" + + # fails because LL address requires a device + add_rt "Gateway is linklocal address, no device" 2 \ + - 2001:db8:104::1/64 $llv1 + + # local address can not be a gateway + add_rt "Gateway can not be local unicast address" 2 \ + - 2001:db8:105::/64 2001:db8:1::1 + add_rt "Gateway can not be local unicast address, with device" 2 \ + - 2001:db8:106::/64 2001:db8:1::1 "dummy0" + add_rt "Gateway can not be a local linklocal address" 2 \ + - 2001:db8:107::1/64 $lldummy "dummy0" + + # VRF tests + add_rt "Gateway can be local address in a VRF" 0 \ + - 2001:db8:108::/64 2001:db8:51::2 + add_rt "Gateway can be local address in a VRF, with device" 0 \ + - 2001:db8:109::/64 2001:db8:51::2 "veth0" + add_rt "Gateway can be local linklocal address in a VRF" 0 \ + - 2001:db8:110::1/64 $llv1 "veth0" + + add_rt "Redirect to VRF lookup" 0 \ + - 2001:db8:111::/64 "" "red" + + add_rt "VRF route, gateway can be local address in default VRF" 0 \ + red 2001:db8:112::/64 2001:db8:51::1 + + # local address in same VRF fails + add_rt "VRF route, gateway can not be a local address" 2 \ + red 2001:db8:113::1/64 2001:db8:2::1 + add_rt "VRF route, gateway can not be a local addr with device" 2 \ + red 2001:db8:114::1/64 2001:db8:2::1 "dummy1" +} + +# Default VRF: +# dummy0 - 198.51.100.1/24 2001:db8:1::1/64 +# veth0 - 192.0.2.1/24 2001:db8:51::1/64 +# +# VRF red: +# dummy1 - 192.168.2.1/24 2001:db8:2::1/64 +# veth1 - 192.0.2.2/24 2001:db8:51::2/64 +# +# [ dummy0 veth0 ]--[ veth1 dummy1 ] + +fib_nexthop_test() +{ + setup + + set -e + + $IP -4 rule add pref 32765 table local + $IP -4 rule del pref 0 + $IP -6 rule add pref 32765 table local + $IP -6 rule del pref 0 + + $IP link add red type vrf table 1 + $IP link set red up + $IP -4 route add vrf red unreachable default metric 4278198272 + $IP -6 route add vrf red unreachable default metric 4278198272 + + $IP link add veth0 type veth peer name veth1 + $IP link set dev veth0 up + $IP address add 192.0.2.1/24 dev veth0 + $IP -6 address add 2001:db8:51::1/64 dev veth0 + + $IP link set dev veth1 vrf red up + $IP address add 192.0.2.2/24 dev veth1 + $IP -6 address add 2001:db8:51::2/64 dev veth1 + + $IP link add dummy1 type dummy + $IP link set dev dummy1 vrf red up + $IP address add 192.168.2.1/24 dev dummy1 + $IP -6 address add 2001:db8:2::1/64 dev dummy1 + set +e + + sleep 1 + fib4_nexthop + fib6_nexthop + + ( + $IP link del dev dummy1 + $IP link del veth0 + $IP link del red + ) 2>/dev/null + cleanup +} + +################################################################################ +# + fib_test() { if [ -n "$TEST" ]; then @@ -398,6 +573,7 @@ fib_test() fib_unreg_test fib_down_test fib_carrier_test + fib_nexthop_test fi }