ioam6_parser uses a packet socket. After the fix to prevent writing to
cloned skb's, the receiver does not see its IOAM data anymore, which
makes input/forward ioam-selftests to fail. As a workaround,
ioam6_parser now uses an IPv6 raw socket and leverages ancillary data to
get hop-by-hop options. As a consequence, the hook is "after" the IOAM
data insertion by the receiver and all tests are working again.
Signed-off-by: Justin Iurman <justin.iurman@xxxxxxxxx>
---
tools/testing/selftests/net/ioam6.sh | 38 ++++----
tools/testing/selftests/net/ioam6_parser.c | 101 +++++++++++----------
2 files changed, 73 insertions(+), 66 deletions(-)
diff --git a/tools/testing/selftests/net/ioam6.sh b/tools/testing/selftests/net/ioam6.sh
index fe59ca3e5596..12491850ae98 100755
--- a/tools/testing/selftests/net/ioam6.sh
+++ b/tools/testing/selftests/net/ioam6.sh
@@ -367,14 +367,12 @@ run_test()
local desc=$2
local node_src=$3
local node_dst=$4
- local ip6_src=$5
- local ip6_dst=$6
- local if_dst=$7
- local trace_type=$8
- local ioam_ns=$9
-
- ip netns exec $node_dst ./ioam6_parser $if_dst $name $ip6_src $ip6_dst \
- $trace_type $ioam_ns &
+ local ip6_dst=$5
+ local trace_type=$6
+ local ioam_ns=$7
+ local type=$8
+
+ ip netns exec $node_dst ./ioam6_parser $name $trace_type $ioam_ns $type &
local spid=$!
sleep 0.1
@@ -489,7 +487,7 @@ out_undef_ns()
trace prealloc type 0x800000 ns 0 size 4 dev veth0
run_test ${FUNCNAME[0]} "${desc} ($1 mode)" $ioam_node_alpha $ioam_node_beta \
- db01::2 db01::1 veth0 0x800000 0
+ db01::1 0x800000 0 $1
[ "$1" = "encap" ] && ip -netns $ioam_node_beta link set ip6tnl0 down
}
@@ -509,7 +507,7 @@ out_no_room()
trace prealloc type 0xc00000 ns 123 size 4 dev veth0
run_test ${FUNCNAME[0]} "${desc} ($1 mode)" $ioam_node_alpha $ioam_node_beta \
- db01::2 db01::1 veth0 0xc00000 123
+ db01::1 0xc00000 123 $1
[ "$1" = "encap" ] && ip -netns $ioam_node_beta link set ip6tnl0 down
}
@@ -543,14 +541,14 @@ out_bits()
if [ $cmd_res != 0 ]
then
npassed=$((npassed+1))
- log_test_passed "$descr"
+ log_test_passed "$descr ($1 mode)"
else
nfailed=$((nfailed+1))
- log_test_failed "$descr"
+ log_test_failed "$descr ($1 mode)"
fi
else
run_test "out_bit$i" "$descr ($1 mode)" $ioam_node_alpha \
- $ioam_node_beta db01::2 db01::1 veth0 ${bit2type[$i]} 123
+ $ioam_node_beta db01::1 ${bit2type[$i]} 123 $1
fi
done
@@ -574,7 +572,7 @@ out_full_supp_trace()
trace prealloc type 0xfff002 ns 123 size 100 dev veth0
run_test ${FUNCNAME[0]} "${desc} ($1 mode)" $ioam_node_alpha $ioam_node_beta \
- db01::2 db01::1 veth0 0xfff002 123
+ db01::1 0xfff002 123 $1
[ "$1" = "encap" ] && ip -netns $ioam_node_beta link set ip6tnl0 down
}
@@ -604,7 +602,7 @@ in_undef_ns()
trace prealloc type 0x800000 ns 0 size 4 dev veth0
run_test ${FUNCNAME[0]} "${desc} ($1 mode)" $ioam_node_alpha $ioam_node_beta \
- db01::2 db01::1 veth0 0x800000 0
+ db01::1 0x800000 0 $1
[ "$1" = "encap" ] && ip -netns $ioam_node_beta link set ip6tnl0 down
}
@@ -624,7 +622,7 @@ in_no_room()
trace prealloc type 0xc00000 ns 123 size 4 dev veth0
run_test ${FUNCNAME[0]} "${desc} ($1 mode)" $ioam_node_alpha $ioam_node_beta \
- db01::2 db01::1 veth0 0xc00000 123
+ db01::1 0xc00000 123 $1
[ "$1" = "encap" ] && ip -netns $ioam_node_beta link set ip6tnl0 down
}
@@ -651,7 +649,7 @@ in_bits()
dev veth0
run_test "in_bit$i" "${desc/<n>/$i} ($1 mode)" $ioam_node_alpha \
- $ioam_node_beta db01::2 db01::1 veth0 ${bit2type[$i]} 123
+ $ioam_node_beta db01::1 ${bit2type[$i]} 123 $1
done
[ "$1" = "encap" ] && ip -netns $ioam_node_beta link set ip6tnl0 down
@@ -679,7 +677,7 @@ in_oflag()
trace prealloc type 0xc00000 ns 123 size 4 dev veth0
run_test ${FUNCNAME[0]} "${desc} ($1 mode)" $ioam_node_alpha $ioam_node_beta \
- db01::2 db01::1 veth0 0xc00000 123
+ db01::1 0xc00000 123 $1
[ "$1" = "encap" ] && ip -netns $ioam_node_beta link set ip6tnl0 down
@@ -703,7 +701,7 @@ in_full_supp_trace()
trace prealloc type 0xfff002 ns 123 size 80 dev veth0
run_test ${FUNCNAME[0]} "${desc} ($1 mode)" $ioam_node_alpha $ioam_node_beta \
- db01::2 db01::1 veth0 0xfff002 123
+ db01::1 0xfff002 123 $1
[ "$1" = "encap" ] && ip -netns $ioam_node_beta link set ip6tnl0 down
}
@@ -731,7 +729,7 @@ fwd_full_supp_trace()
trace prealloc type 0xfff002 ns 123 size 244 via db01::1 dev veth0
run_test ${FUNCNAME[0]} "${desc} ($1 mode)" $ioam_node_alpha $ioam_node_gamma \
- db01::2 db02::2 veth0 0xfff002 123
+ db02::2 0xfff002 123 $1
[ "$1" = "encap" ] && ip -netns $ioam_node_gamma link set ip6tnl0 down
}
diff --git a/tools/testing/selftests/net/ioam6_parser.c b/tools/testing/selftests/net/ioam6_parser.c
index d9d1d4190126..14b354e14d25 100644
--- a/tools/testing/selftests/net/ioam6_parser.c
+++ b/tools/testing/selftests/net/ioam6_parser.c
@@ -8,7 +8,6 @@
#include <errno.h>
#include <limits.h>
#include <linux/const.h>
-#include <linux/if_ether.h>
#include <linux/ioam6.h>
#include <linux/ipv6.h>
#include <stdlib.h>
@@ -512,14 +511,6 @@ static int str2id(const char *tname)
return -1;
}
-static int ipv6_addr_equal(const struct in6_addr *a1, const struct in6_addr *a2)
-{
- return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
- (a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
- (a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
- (a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
-}
-
static int get_u32(__u32 *val, const char *arg, int base)
{
unsigned long res;
@@ -603,70 +594,88 @@ static int (*func[__TEST_MAX])(int, struct ioam6_trace_hdr *, __u32, __u16) = {
int main(int argc, char **argv)
{
- int fd, size, hoplen, tid, ret = 1;
- struct in6_addr src, dst;
+ int fd, size, hoplen, tid, ret = 1, on = 1;
+ __u8 buffer[512], is_encap;
struct ioam6_hdr *opt;
- struct ipv6hdr *ip6h;
- __u8 buffer[400], *p;
- __u16 ioam_ns;
+ struct cmsghdr *cmsg;
+ struct msghdr msg;
+ struct iovec iov;
__u32 tr_type;
+ __u16 ioam_ns;
+ __u8 *ptr;
- if (argc != 7)
+ if (argc != 5)
goto out;
- tid = str2id(argv[2]);
+ tid = str2id(argv[1]);
if (tid < 0 || !func[tid])
goto out;
- if (inet_pton(AF_INET6, argv[3], &src) != 1 ||
- inet_pton(AF_INET6, argv[4], &dst) != 1)
+ if (get_u32(&tr_type, argv[2], 16) ||
+ get_u16(&ioam_ns, argv[3], 0))
goto out;
- if (get_u32(&tr_type, argv[5], 16) ||
- get_u16(&ioam_ns, argv[6], 0))
+ if (!strcmp(argv[4], "inline"))
+ is_encap = 0;
+ else if (!strcmp(argv[4], "encap"))
+ is_encap = 1;
+ else
goto out;
- fd = socket(AF_PACKET, SOCK_DGRAM, __cpu_to_be16(ETH_P_IPV6));
- if (!fd)
+ fd = socket(PF_INET6, SOCK_RAW,
+ is_encap ? IPPROTO_IPV6 : IPPROTO_ICMPV6);
+ if (fd < 0)
goto out;
- if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
- argv[1], strlen(argv[1])))
- goto close;
+ setsockopt(fd, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &on, sizeof(on));
+ iov.iov_len = 1;
+ iov.iov_base = malloc(CMSG_SPACE(sizeof(buffer)));
+ if (!iov.iov_base)
+ goto close;
recv:
- size = recv(fd, buffer, sizeof(buffer), 0);
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+ msg.msg_control = buffer;
+ msg.msg_controllen = CMSG_SPACE(sizeof(buffer));
+
+ size = recvmsg(fd, &msg, 0);
if (size <= 0)
goto close;
- ip6h = (struct ipv6hdr *)buffer;
+ for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL;
+ cmsg = CMSG_NXTHDR(&msg, cmsg)) {
+ if (cmsg->cmsg_level != IPPROTO_IPV6 ||
+ cmsg->cmsg_type != IPV6_HOPOPTS ||
+ cmsg->cmsg_len < sizeof(struct ipv6_hopopt_hdr))
+ continue;
- if (!ipv6_addr_equal(&ip6h->saddr, &src) ||
- !ipv6_addr_equal(&ip6h->daddr, &dst))
- goto recv;
+ ptr = (__u8 *)CMSG_DATA(cmsg);
- if (ip6h->nexthdr != IPPROTO_HOPOPTS)
- goto close;
+ hoplen = (ptr[1] + 1) << 3;
+ ptr += sizeof(struct ipv6_hopopt_hdr);
- p = buffer + sizeof(*ip6h);
- hoplen = (p[1] + 1) << 3;
- p += sizeof(struct ipv6_hopopt_hdr);
+ while (hoplen > 0) {
+ opt = (struct ioam6_hdr *)ptr;
- while (hoplen > 0) {
- opt = (struct ioam6_hdr *)p;
+ if (opt->opt_type == IPV6_TLV_IOAM &&
+ opt->type == IOAM6_TYPE_PREALLOC) {
+ ptr += sizeof(*opt);
+ ret = func[tid](tid,
+ (struct ioam6_trace_hdr *)ptr,
+ tr_type, ioam_ns);
+ goto close;
+ }
- if (opt->opt_type == IPV6_TLV_IOAM &&
- opt->type == IOAM6_TYPE_PREALLOC) {
- p += sizeof(*opt);
- ret = func[tid](tid, (struct ioam6_trace_hdr *)p,
- tr_type, ioam_ns);
- break;
+ ptr += opt->opt_len + 2;
+ hoplen -= opt->opt_len + 2;
}
-
- p += opt->opt_len + 2;
- hoplen -= opt->opt_len + 2;
}
+
+ goto recv;
close:
+ free(iov.iov_base);
close(fd);
out:
return ret;
--
2.34.1
