diff options
| -rw-r--r-- | net/ipv4/ip_input.c | 11 | ||||
| -rw-r--r-- | net/ipv4/route.c | 2 | ||||
| -rw-r--r-- | tools/testing/selftests/net/Makefile | 1 | ||||
| -rwxr-xr-x | tools/testing/selftests/net/route_hint.sh | 79 |
4 files changed, 88 insertions, 5 deletions
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c index fc323994b1fa..a09aca2c8567 100644 --- a/net/ipv4/ip_input.c +++ b/net/ipv4/ip_input.c @@ -587,9 +587,13 @@ static void ip_sublist_rcv_finish(struct list_head *head) } static struct sk_buff *ip_extract_route_hint(const struct net *net, - struct sk_buff *skb, int rt_type) + struct sk_buff *skb) { - if (fib4_has_custom_rules(net) || rt_type == RTN_BROADCAST || + const struct iphdr *iph = ip_hdr(skb); + + if (fib4_has_custom_rules(net) || + ipv4_is_lbcast(iph->daddr) || + ipv4_is_zeronet(iph->daddr) || IPCB(skb)->flags & IPSKB_MULTIPATH) return NULL; @@ -618,8 +622,7 @@ static void ip_list_rcv_finish(struct net *net, struct list_head *head) dst = skb_dst(skb); if (curr_dst != dst) { - hint = ip_extract_route_hint(net, skb, - dst_rtable(dst)->rt_type); + hint = ip_extract_route_hint(net, skb); /* dispatch old sublist */ if (!list_empty(&sublist)) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index f639a2ae881a..1f212b2ce4c6 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2210,7 +2210,7 @@ ip_route_use_hint(struct sk_buff *skb, __be32 daddr, __be32 saddr, goto martian_source; } - if (rt->rt_type != RTN_LOCAL) + if (!(rt->rt_flags & RTCF_LOCAL)) goto skip_validate_source; reason = fib_validate_source_reason(skb, saddr, daddr, dscp, 0, dev, diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index b31a71f2b372..eef0b8f8a7b0 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -117,6 +117,7 @@ TEST_GEN_FILES += tfo TEST_PROGS += tfo_passive.sh TEST_PROGS += broadcast_pmtu.sh TEST_PROGS += ipv6_force_forwarding.sh +TEST_PROGS += route_hint.sh # YNL files, must be before "include ..lib.mk" YNL_GEN_FILES := busy_poller netlink-dumps diff --git a/tools/testing/selftests/net/route_hint.sh b/tools/testing/selftests/net/route_hint.sh new file mode 100755 index 000000000000..2db01ece0cc1 --- /dev/null +++ b/tools/testing/selftests/net/route_hint.sh @@ -0,0 +1,79 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +# This test ensures directed broadcast routes use dst hint mechanism + +source lib.sh + +CLIENT_IP4="192.168.0.1" +SERVER_IP4="192.168.0.2" +BROADCAST_ADDRESS="192.168.0.255" + +setup() { + setup_ns CLIENT_NS SERVER_NS + + ip -net "${SERVER_NS}" link add link1 type veth peer name link0 netns "${CLIENT_NS}" + + ip -net "${CLIENT_NS}" link set link0 up + ip -net "${CLIENT_NS}" addr add "${CLIENT_IP4}/24" dev link0 + + ip -net "${SERVER_NS}" link set link1 up + ip -net "${SERVER_NS}" addr add "${SERVER_IP4}/24" dev link1 + + ip netns exec "${CLIENT_NS}" ethtool -K link0 tcp-segmentation-offload off + ip netns exec "${SERVER_NS}" sh -c "echo 500000000 > /sys/class/net/link1/gro_flush_timeout" + ip netns exec "${SERVER_NS}" sh -c "echo 1 > /sys/class/net/link1/napi_defer_hard_irqs" + ip netns exec "${SERVER_NS}" ethtool -K link1 generic-receive-offload on +} + +cleanup() { + ip -net "${SERVER_NS}" link del link1 + cleanup_ns "${CLIENT_NS}" "${SERVER_NS}" +} + +directed_bcast_hint_test() +{ + local rc=0 + + echo "Testing for directed broadcast route hint" + + orig_in_brd=$(ip netns exec "${SERVER_NS}" lnstat -j -i1 -c1 | jq '.in_brd') + ip netns exec "${CLIENT_NS}" mausezahn link0 -a own -b bcast -A "${CLIENT_IP4}" \ + -B "${BROADCAST_ADDRESS}" -c1 -t tcp "sp=1-100,dp=1234,s=1,a=0" -p 5 -q + sleep 1 + new_in_brd=$(ip netns exec "${SERVER_NS}" lnstat -j -i1 -c1 | jq '.in_brd') + + res=$(echo "${new_in_brd} - ${orig_in_brd}" | bc) + + if [ "${res}" -lt 100 ]; then + echo "[ OK ]" + rc="${ksft_pass}" + else + echo "[FAIL] expected in_brd to be under 100, got ${res}" + rc="${ksft_fail}" + fi + + return "${rc}" +} + +if [ ! -x "$(command -v mausezahn)" ]; then + echo "SKIP: Could not run test without mausezahn tool" + exit "${ksft_skip}" +fi + +if [ ! -x "$(command -v jq)" ]; then + echo "SKIP: Could not run test without jq tool" + exit "${ksft_skip}" +fi + +if [ ! -x "$(command -v bc)" ]; then + echo "SKIP: Could not run test without bc tool" + exit "${ksft_skip}" +fi + +trap cleanup EXIT + +setup + +directed_bcast_hint_test +exit $? |