| Message ID | 20240603185647.2310748-10-amorenoz@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | None | expand |
On Mon, Jun 03, 2024 at 08:56:43PM +0200, Adrian Moreno wrote: > Add a test to verify sampling packets via psample works. > > In order to do that, create a subcommand in ovs-dpctl.py to listen to > on the psample multicast group and print samples. > > In order to also test simultaneous sFlow and psample actions and > packet truncation, add missing parsing support for "userspace" and > "trunc" actions. > > Signed-off-by: Adrian Moreno <amorenoz@redhat.com> ... > @@ -803,6 +819,25 @@ class ovsactions(nla): > self["attrs"].append(["OVS_ACTION_ATTR_EMIT_SAMPLE", emitact]) > parsed = True > > + elif parse_starts_block(actstr, "userspace(", False): > + uact = self.userspace() > + actstr = uact.parse(actstr[len("userpsace(") : ]) nit: userspace Flagged by checkpatch.pl --codespell > + self["attrs"].append(["OVS_ACTION_ATTR_USERSPACE", uact]) > + parsed = True > + > + elif parse_starts_block(actstr, "trunc", False): > + parencount += 1 > + actstr, val = parse_extract_field( > + actstr, > + "trunc(", > + r"([0-9]+)", > + int, > + False, > + None, > + ) > + self["attrs"].append(["OVS_ACTION_ATTR_TRUNC", val]) > + parsed = True > + > actstr = actstr[strspn(actstr, ", ") :] > while parencount > 0: > parencount -= 1
On Wed, Jun 05, 2024 at 08:43:14PM GMT, Simon Horman wrote: > On Mon, Jun 03, 2024 at 08:56:43PM +0200, Adrian Moreno wrote: > > Add a test to verify sampling packets via psample works. > > > > In order to do that, create a subcommand in ovs-dpctl.py to listen to > > on the psample multicast group and print samples. > > > > In order to also test simultaneous sFlow and psample actions and > > packet truncation, add missing parsing support for "userspace" and > > "trunc" actions. > > > > Signed-off-by: Adrian Moreno <amorenoz@redhat.com> > > ... > > > @@ -803,6 +819,25 @@ class ovsactions(nla): > > self["attrs"].append(["OVS_ACTION_ATTR_EMIT_SAMPLE", emitact]) > > parsed = True > > > > + elif parse_starts_block(actstr, "userspace(", False): > > + uact = self.userspace() > > + actstr = uact.parse(actstr[len("userpsace(") : ]) > > nit: userspace > > Flagged by checkpatch.pl --codespell > Thanks. Will fix it. > > + self["attrs"].append(["OVS_ACTION_ATTR_USERSPACE", uact]) > > + parsed = True > > + > > + elif parse_starts_block(actstr, "trunc", False): > > + parencount += 1 > > + actstr, val = parse_extract_field( > > + actstr, > > + "trunc(", > > + r"([0-9]+)", > > + int, > > + False, > > + None, > > + ) > > + self["attrs"].append(["OVS_ACTION_ATTR_TRUNC", val]) > > + parsed = True > > + > > actstr = actstr[strspn(actstr, ", ") :] > > while parencount > 0: > > parencount -= 1 >
Adrian Moreno <amorenoz@redhat.com> writes: > Add a test to verify sampling packets via psample works. > > In order to do that, create a subcommand in ovs-dpctl.py to listen to > on the psample multicast group and print samples. > > In order to also test simultaneous sFlow and psample actions and > packet truncation, add missing parsing support for "userspace" and > "trunc" actions. Maybe split that into a separate patch. This has a bugfix and 3 features being pushed in. I know it's already getting long as a series, so maybe it's okay to fold the userspace attribute bugfix with the parse support (since it wasn't really usable before). > Signed-off-by: Adrian Moreno <amorenoz@redhat.com> > --- > .../selftests/net/openvswitch/openvswitch.sh | 99 +++++++++++++++- > .../selftests/net/openvswitch/ovs-dpctl.py | 112 +++++++++++++++++- > 2 files changed, 204 insertions(+), 7 deletions(-) > > diff --git a/tools/testing/selftests/net/openvswitch/openvswitch.sh b/tools/testing/selftests/net/openvswitch/openvswitch.sh > index 5cae53543849..f6e0ae3f6424 100755 > --- a/tools/testing/selftests/net/openvswitch/openvswitch.sh > +++ b/tools/testing/selftests/net/openvswitch/openvswitch.sh > @@ -20,7 +20,8 @@ tests=" > nat_related_v4 ip4-nat-related: ICMP related matches work with SNAT > netlink_checks ovsnl: validate netlink attrs and settings > upcall_interfaces ovs: test the upcall interfaces > - drop_reason drop: test drop reasons are emitted" > + drop_reason drop: test drop reasons are emitted > + emit_sample emit_sample: Sampling packets with psample" > > info() { > [ $VERBOSE = 0 ] || echo $* > @@ -170,6 +171,19 @@ ovs_drop_reason_count() > return `echo "$perf_output" | grep "$pattern" | wc -l` > } > > +ovs_test_flow_fails () { > + ERR_MSG="Flow actions may not be safe on all matching packets" > + > + PRE_TEST=$(dmesg | grep -c "${ERR_MSG}") > + ovs_add_flow $@ &> /dev/null $@ && return 1 > + POST_TEST=$(dmesg | grep -c "${ERR_MSG}") > + > + if [ "$PRE_TEST" == "$POST_TEST" ]; then > + return 1 > + fi > + return 0 > +} > + > usage() { > echo > echo "$0 [OPTIONS] [TEST]..." > @@ -184,6 +198,89 @@ usage() { > exit 1 > } > > + > +# emit_sample test > +# - use emit_sample to observe packets > +test_emit_sample() { > + sbx_add "test_emit_sample" || return $? > + > + # Add a datapath with per-vport dispatching. > + ovs_add_dp "test_emit_sample" emit_sample -V 2:1 || return 1 > + > + info "create namespaces" > + ovs_add_netns_and_veths "test_emit_sample" "emit_sample" \ > + client c0 c1 172.31.110.10/24 -u || return 1 > + ovs_add_netns_and_veths "test_emit_sample" "emit_sample" \ > + server s0 s1 172.31.110.20/24 -u || return 1 > + > + # Check if emit_sample actions can be configured. > + ovs_add_flow "test_emit_sample" emit_sample \ > + 'in_port(1),eth(),eth_type(0x0806),arp()' 'emit_sample(group=1)' > + if [ $? == 1 ]; then > + info "no support for emit_sample - skipping" > + ovs_exit_sig > + return $ksft_skip > + fi > + > + ovs_del_flows "test_emit_sample" emit_sample > + > + # Allow ARP > + ovs_add_flow "test_emit_sample" emit_sample \ > + 'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1 > + ovs_add_flow "test_emit_sample" emit_sample \ > + 'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1 > + > + # Test action verification. > + OLDIFS=$IFS > + IFS='*' > + min_key='in_port(1),eth(),eth_type(0x0800),ipv4()' > + for testcase in \ > + "cookie to large"*"emit_sample(group=1,cookie=1615141312111009080706050403020100)" \ > + "no group with cookie"*"emit_sample(cookie=abcd)" \ > + "no group"*"sample()"; > + do > + set -- $testcase; > + ovs_test_flow_fails "test_emit_sample" emit_sample $min_key $2 > + if [ $? == 1 ]; then > + info "failed - $1" > + return 1 > + fi > + done > + IFS=$OLDIFS > + > + # Sample first 14 bytes of all traffic. > + ovs_add_flow "test_emit_sample" emit_sample \ > + "in_port(1),eth(),eth_type(0x0800),ipv4(src=172.31.110.10,proto=1),icmp()" "trunc(14),emit_sample(group=1,cookie=c0ffee),2" > + > + # Sample all traffic. In this case, use a sample() action with both > + # emit_sample and an upcall emulating simultaneous local sampling and > + # sFlow / IPFIX. > + nlpid=$(grep -E "listening on upcall packet handler" $ovs_dir/s0.out | cut -d ":" -f 2 | tr -d ' ') > + ovs_add_flow "test_emit_sample" emit_sample \ > + "in_port(2),eth(),eth_type(0x0800),ipv4(src=172.31.110.20,proto=1),icmp()" "sample(sample=100%,actions(emit_sample(group=2,cookie=eeff0c),userspace(pid=${nlpid},userdata=eeff0c))),1" > + > + # Record emit_sample data. > + python3 $ovs_base/ovs-dpctl.py psample >$ovs_dir/psample.out 2>$ovs_dir/psample.err & > + pid=$! > + on_exit "ovs_sbx test_emit_sample kill -TERM $pid 2>/dev/null" Maybe ovs_netns_spawn_daemon ? > + > + # Send a single ping. > + sleep 1 > + ovs_sbx "test_emit_sample" ip netns exec client ping -I c1 172.31.110.20 -c 1 || return 1 > + sleep 1 > + > + # We should have received one userspace action upcall and 2 psample packets. > + grep -E "userspace action command" $ovs_dir/s0.out >/dev/null 2>&1 || return 1 > + > + # client -> server samples should only contain the first 14 bytes of the packet. > + grep -E "rate:4294967295,group:1,cookie:c0ffee data:[0-9a-f]{28}$" \ > + $ovs_dir/psample.out >/dev/null 2>&1 || return 1 > + grep -E "rate:4294967295,group:2,cookie:eeff0c" \ > + $ovs_dir/psample.out >/dev/null 2>&1 || return 1 > + > + return 0 > +} > + > # drop_reason test > # - drop packets and verify the right drop reason is reported > test_drop_reason() { > diff --git a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py > index f8b5362aac8c..44fdeb9491a2 100644 > --- a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py > +++ b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py > @@ -27,8 +27,10 @@ try: > from pyroute2.netlink import genlmsg > from pyroute2.netlink import nla > from pyroute2.netlink import nlmsg_atoms > - from pyroute2.netlink.exceptions import NetlinkError > + from pyroute2.netlink.event import EventSocket > from pyroute2.netlink.generic import GenericNetlinkSocket > + from pyroute2.netlink.nlsocket import Marshal > + from pyroute2.netlink.exceptions import NetlinkError Why did this get moved? > import pyroute2 > > except ModuleNotFoundError: > @@ -575,13 +577,27 @@ class ovsactions(nla): > print_str += "userdata=" > for f in self.get_attr("OVS_USERSPACE_ATTR_USERDATA"): > print_str += "%x." % f > - if self.get_attr("OVS_USERSPACE_ATTR_TUN_PORT") is not None: > + if self.get_attr("OVS_USERSPACE_ATTR_EGRESS_TUN_PORT") is not None: > print_str += "egress_tun_port=%d" % self.get_attr( > - "OVS_USERSPACE_ATTR_TUN_PORT" > + "OVS_USERSPACE_ATTR_EGRESS_TUN_PORT" Looks like a bugfix here. > ) > print_str += ")" > return print_str > > + def parse(self, actstr): > + attrs_desc = ( > + ("pid", "OVS_USERSPACE_ATTR_PID", int), > + ("userdata", "OVS_USERSPACE_ATTR_USERDATA", > + lambda x: list(bytearray.fromhex(x))), > + ("egress_tun_port", "OVS_USERSPACE_ATTR_EGRESS_TUN_PORT", int) > + ) > + > + attrs, actstr = parse_attrs(actstr, attrs_desc) > + for attr in attrs: > + self["attrs"].append(attr) > + > + return actstr > + > def dpstr(self, more=False): > print_str = "" > > @@ -803,6 +819,25 @@ class ovsactions(nla): > self["attrs"].append(["OVS_ACTION_ATTR_EMIT_SAMPLE", emitact]) > parsed = True > > + elif parse_starts_block(actstr, "userspace(", False): > + uact = self.userspace() > + actstr = uact.parse(actstr[len("userpsace(") : ]) > + self["attrs"].append(["OVS_ACTION_ATTR_USERSPACE", uact]) > + parsed = True > + > + elif parse_starts_block(actstr, "trunc", False): This should be "trunc(" > + parencount += 1 > + actstr, val = parse_extract_field( > + actstr, > + "trunc(", > + r"([0-9]+)", > + int, > + False, > + None, > + ) > + self["attrs"].append(["OVS_ACTION_ATTR_TRUNC", val]) > + parsed = True > + > actstr = actstr[strspn(actstr, ", ") :] > while parencount > 0: > parencount -= 1 > @@ -2184,10 +2219,70 @@ class OvsFlow(GenericNetlinkSocket): > print("MISS upcall[%d/%s]: %s" % (seq, pktpres, keystr), flush=True) > > def execute(self, packetmsg): > - print("userspace execute command") > + print("userspace execute command", flush=True) > > def action(self, packetmsg): > - print("userspace action command") > + print("userspace action command", flush=True) > + > + > +class psample_sample(genlmsg): > + nla_map = ( > + ("PSAMPLE_ATTR_IIFINDEX", "none"), > + ("PSAMPLE_ATTR_OIFINDEX", "none"), > + ("PSAMPLE_ATTR_ORIGSIZE", "none"), > + ("PSAMPLE_ATTR_SAMPLE_GROUP", "uint32"), > + ("PSAMPLE_ATTR_GROUP_SEQ", "none"), > + ("PSAMPLE_ATTR_SAMPLE_RATE", "uint32"), > + ("PSAMPLE_ATTR_DATA", "array(uint8)"), > + ("PSAMPLE_ATTR_GROUP_REFCOUNT", "none"), > + ("PSAMPLE_ATTR_TUNNEL", "none"), > + ("PSAMPLE_ATTR_PAD", "none"), > + ("PSAMPLE_ATTR_OUT_TC", "none"), > + ("PSAMPLE_ATTR_OUT_TC_OCC", "none"), > + ("PSAMPLE_ATTR_LATENCY", "none"), > + ("PSAMPLE_ATTR_TIMESTAMP", "none"), > + ("PSAMPLE_ATTR_PROTO", "none"), > + ("PSAMPLE_ATTR_USER_COOKIE", "array(uint8)"), > + ) > + > + def dpstr(self): > + fields = [] > + data = "" > + for (attr, value) in self["attrs"]: > + if attr == "PSAMPLE_ATTR_SAMPLE_GROUP": > + fields.append("group:%d" % value) > + if attr == "PSAMPLE_ATTR_SAMPLE_RATE": > + fields.append("rate:%d" % value) > + if attr == "PSAMPLE_ATTR_USER_COOKIE": > + value = "".join(format(x, "02x") for x in value) > + fields.append("cookie:%s" % value) > + if attr == "PSAMPLE_ATTR_DATA" and len(value) > 0: > + data = "data:%s" % "".join(format(x, "02x") for x in value) > + > + return ("%s %s" % (",".join(fields), data)).strip() > + > + > +class psample_msg(Marshal): > + PSAMPLE_CMD_SAMPLE = 0 > + PSAMPLE_CMD_GET_GROUP = 1 > + PSAMPLE_CMD_NEW_GROUP = 2 > + PSAMPLE_CMD_DEL_GROUP = 3 > + PSAMPLE_CMD_SET_FILTER = 4 > + msg_map = {PSAMPLE_CMD_SAMPLE: psample_sample} > + > + > +class Psample(EventSocket): > + genl_family = "psample" > + mcast_groups = ["packets"] > + marshal_class = psample_msg > + > + def read_samples(self): > + while True: > + try: > + for msg in self.get(): > + print(msg.dpstr(), flush=True) > + except NetlinkError as ne: > + raise ne > > > def print_ovsdp_full(dp_lookup_rep, ifindex, ndb=NDB(), vpl=OvsVport()): > @@ -2247,7 +2342,7 @@ def main(argv): > help="Increment 'verbose' output counter.", > default=0, > ) > - subparsers = parser.add_subparsers() > + subparsers = parser.add_subparsers(dest="subcommand") > > showdpcmd = subparsers.add_parser("show") > showdpcmd.add_argument( > @@ -2304,6 +2399,8 @@ def main(argv): > delfscmd = subparsers.add_parser("del-flows") > delfscmd.add_argument("flsbr", help="Datapath name") > > + subparsers.add_parser("psample") > + > args = parser.parse_args() > > if args.verbose > 0: > @@ -2318,6 +2415,9 @@ def main(argv): > > sys.setrecursionlimit(100000) > > + if args.subcommand == "psample": > + Psample().read_samples() > + > if hasattr(args, "showdp"): > found = False > for iface in ndb.interfaces:
On Fri, Jun 14, 2024 at 01:07:33PM GMT, Aaron Conole wrote: > Adrian Moreno <amorenoz@redhat.com> writes: > > > Add a test to verify sampling packets via psample works. > > > > In order to do that, create a subcommand in ovs-dpctl.py to listen to > > on the psample multicast group and print samples. > > > > In order to also test simultaneous sFlow and psample actions and > > packet truncation, add missing parsing support for "userspace" and > > "trunc" actions. > > Maybe split that into a separate patch. This has a bugfix and 3 > features being pushed in. I know it's already getting long as a series, > so maybe it's okay to fold the userspace attribute bugfix with the parse > support (since it wasn't really usable before). > OK. Sounds reasonable. > > Signed-off-by: Adrian Moreno <amorenoz@redhat.com> > > --- > > .../selftests/net/openvswitch/openvswitch.sh | 99 +++++++++++++++- > > .../selftests/net/openvswitch/ovs-dpctl.py | 112 +++++++++++++++++- > > 2 files changed, 204 insertions(+), 7 deletions(-) > > > > diff --git a/tools/testing/selftests/net/openvswitch/openvswitch.sh b/tools/testing/selftests/net/openvswitch/openvswitch.sh > > index 5cae53543849..f6e0ae3f6424 100755 > > --- a/tools/testing/selftests/net/openvswitch/openvswitch.sh > > +++ b/tools/testing/selftests/net/openvswitch/openvswitch.sh > > @@ -20,7 +20,8 @@ tests=" > > nat_related_v4 ip4-nat-related: ICMP related matches work with SNAT > > netlink_checks ovsnl: validate netlink attrs and settings > > upcall_interfaces ovs: test the upcall interfaces > > - drop_reason drop: test drop reasons are emitted" > > + drop_reason drop: test drop reasons are emitted > > + emit_sample emit_sample: Sampling packets with psample" > > > > info() { > > [ $VERBOSE = 0 ] || echo $* > > @@ -170,6 +171,19 @@ ovs_drop_reason_count() > > return `echo "$perf_output" | grep "$pattern" | wc -l` > > } > > > > +ovs_test_flow_fails () { > > + ERR_MSG="Flow actions may not be safe on all matching packets" > > + > > + PRE_TEST=$(dmesg | grep -c "${ERR_MSG}") > > + ovs_add_flow $@ &> /dev/null $@ && return 1 > > + POST_TEST=$(dmesg | grep -c "${ERR_MSG}") > > + > > + if [ "$PRE_TEST" == "$POST_TEST" ]; then > > + return 1 > > + fi > > + return 0 > > +} > > + > > usage() { > > echo > > echo "$0 [OPTIONS] [TEST]..." > > @@ -184,6 +198,89 @@ usage() { > > exit 1 > > } > > > > + > > +# emit_sample test > > +# - use emit_sample to observe packets > > +test_emit_sample() { > > + sbx_add "test_emit_sample" || return $? > > + > > + # Add a datapath with per-vport dispatching. > > + ovs_add_dp "test_emit_sample" emit_sample -V 2:1 || return 1 > > + > > + info "create namespaces" > > + ovs_add_netns_and_veths "test_emit_sample" "emit_sample" \ > > + client c0 c1 172.31.110.10/24 -u || return 1 > > + ovs_add_netns_and_veths "test_emit_sample" "emit_sample" \ > > + server s0 s1 172.31.110.20/24 -u || return 1 > > + > > + # Check if emit_sample actions can be configured. > > + ovs_add_flow "test_emit_sample" emit_sample \ > > + 'in_port(1),eth(),eth_type(0x0806),arp()' 'emit_sample(group=1)' > > + if [ $? == 1 ]; then > > + info "no support for emit_sample - skipping" > > + ovs_exit_sig > > + return $ksft_skip > > + fi > > + > > + ovs_del_flows "test_emit_sample" emit_sample > > + > > + # Allow ARP > > + ovs_add_flow "test_emit_sample" emit_sample \ > > + 'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1 > > + ovs_add_flow "test_emit_sample" emit_sample \ > > + 'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1 > > + > > + # Test action verification. > > + OLDIFS=$IFS > > + IFS='*' > > + min_key='in_port(1),eth(),eth_type(0x0800),ipv4()' > > + for testcase in \ > > + "cookie to large"*"emit_sample(group=1,cookie=1615141312111009080706050403020100)" \ > > + "no group with cookie"*"emit_sample(cookie=abcd)" \ > > + "no group"*"sample()"; > > + do > > + set -- $testcase; > > + ovs_test_flow_fails "test_emit_sample" emit_sample $min_key $2 > > + if [ $? == 1 ]; then > > + info "failed - $1" > > + return 1 > > + fi > > + done > > + IFS=$OLDIFS > > + > > + # Sample first 14 bytes of all traffic. > > + ovs_add_flow "test_emit_sample" emit_sample \ > > + "in_port(1),eth(),eth_type(0x0800),ipv4(src=172.31.110.10,proto=1),icmp()" "trunc(14),emit_sample(group=1,cookie=c0ffee),2" > > + > > + # Sample all traffic. In this case, use a sample() action with both > > + # emit_sample and an upcall emulating simultaneous local sampling and > > + # sFlow / IPFIX. > > + nlpid=$(grep -E "listening on upcall packet handler" $ovs_dir/s0.out | cut -d ":" -f 2 | tr -d ' ') > > + ovs_add_flow "test_emit_sample" emit_sample \ > > + "in_port(2),eth(),eth_type(0x0800),ipv4(src=172.31.110.20,proto=1),icmp()" "sample(sample=100%,actions(emit_sample(group=2,cookie=eeff0c),userspace(pid=${nlpid},userdata=eeff0c))),1" > > + > > + # Record emit_sample data. > > + python3 $ovs_base/ovs-dpctl.py psample >$ovs_dir/psample.out 2>$ovs_dir/psample.err & > > + pid=$! > > + on_exit "ovs_sbx test_emit_sample kill -TERM $pid 2>/dev/null" > > Maybe ovs_netns_spawn_daemon ? > I'll take a look at it, thanks. > > + > > + # Send a single ping. > > + sleep 1 > > + ovs_sbx "test_emit_sample" ip netns exec client ping -I c1 172.31.110.20 -c 1 || return 1 > > + sleep 1 > > + > > + # We should have received one userspace action upcall and 2 psample packets. > > + grep -E "userspace action command" $ovs_dir/s0.out >/dev/null 2>&1 || return 1 > > + > > + # client -> server samples should only contain the first 14 bytes of the packet. > > + grep -E "rate:4294967295,group:1,cookie:c0ffee data:[0-9a-f]{28}$" \ > > + $ovs_dir/psample.out >/dev/null 2>&1 || return 1 > > + grep -E "rate:4294967295,group:2,cookie:eeff0c" \ > > + $ovs_dir/psample.out >/dev/null 2>&1 || return 1 > > + > > + return 0 > > +} > > + > > # drop_reason test > > # - drop packets and verify the right drop reason is reported > > test_drop_reason() { > > diff --git a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py > > index f8b5362aac8c..44fdeb9491a2 100644 > > --- a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py > > +++ b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py > > @@ -27,8 +27,10 @@ try: > > from pyroute2.netlink import genlmsg > > from pyroute2.netlink import nla > > from pyroute2.netlink import nlmsg_atoms > > - from pyroute2.netlink.exceptions import NetlinkError > > + from pyroute2.netlink.event import EventSocket > > from pyroute2.netlink.generic import GenericNetlinkSocket > > + from pyroute2.netlink.nlsocket import Marshal > > + from pyroute2.netlink.exceptions import NetlinkError > > Why did this get moved? > I guess I first removed it and then added it in the wrong order. I'll restore it, thanks. > > import pyroute2 > > > > except ModuleNotFoundError: > > @@ -575,13 +577,27 @@ class ovsactions(nla): > > print_str += "userdata=" > > for f in self.get_attr("OVS_USERSPACE_ATTR_USERDATA"): > > print_str += "%x." % f > > - if self.get_attr("OVS_USERSPACE_ATTR_TUN_PORT") is not None: > > + if self.get_attr("OVS_USERSPACE_ATTR_EGRESS_TUN_PORT") is not None: > > print_str += "egress_tun_port=%d" % self.get_attr( > > - "OVS_USERSPACE_ATTR_TUN_PORT" > > + "OVS_USERSPACE_ATTR_EGRESS_TUN_PORT" > > Looks like a bugfix here. > Yep. I'll fold it in with the rest of the usersapce action support into an independent patch. > > ) > > print_str += ")" > > return print_str > > > > + def parse(self, actstr): > > + attrs_desc = ( > > + ("pid", "OVS_USERSPACE_ATTR_PID", int), > > + ("userdata", "OVS_USERSPACE_ATTR_USERDATA", > > + lambda x: list(bytearray.fromhex(x))), > > + ("egress_tun_port", "OVS_USERSPACE_ATTR_EGRESS_TUN_PORT", int) > > + ) > > + > > + attrs, actstr = parse_attrs(actstr, attrs_desc) > > + for attr in attrs: > > + self["attrs"].append(attr) > > + > > + return actstr > > + > > def dpstr(self, more=False): > > print_str = "" > > > > @@ -803,6 +819,25 @@ class ovsactions(nla): > > self["attrs"].append(["OVS_ACTION_ATTR_EMIT_SAMPLE", emitact]) > > parsed = True > > > > + elif parse_starts_block(actstr, "userspace(", False): > > + uact = self.userspace() > > + actstr = uact.parse(actstr[len("userpsace(") : ]) > > + self["attrs"].append(["OVS_ACTION_ATTR_USERSPACE", uact]) > > + parsed = True > > + > > + elif parse_starts_block(actstr, "trunc", False): > > This should be "trunc(" > Probably, yes. The rest of the actions do look for the initial "(". Thinking in a generalization of the action parsing, could we just look for the action name, i.e: "trunc" and let errors be raised inside each parsing logic? In this case, check if "val is not None" after "parse_extract_field". > > + parencount += 1 > > + actstr, val = parse_extract_field( > > + actstr, > > + "trunc(", > > + r"([0-9]+)", > > + int, > > + False, > > + None, > > + ) > > + self["attrs"].append(["OVS_ACTION_ATTR_TRUNC", val]) > > + parsed = True > > + > > actstr = actstr[strspn(actstr, ", ") :] > > while parencount > 0: > > parencount -= 1 > > @@ -2184,10 +2219,70 @@ class OvsFlow(GenericNetlinkSocket): > > print("MISS upcall[%d/%s]: %s" % (seq, pktpres, keystr), flush=True) > > > > def execute(self, packetmsg): > > - print("userspace execute command") > > + print("userspace execute command", flush=True) > > > > def action(self, packetmsg): > > - print("userspace action command") > > + print("userspace action command", flush=True) > > + > > + > > +class psample_sample(genlmsg): > > + nla_map = ( > > + ("PSAMPLE_ATTR_IIFINDEX", "none"), > > + ("PSAMPLE_ATTR_OIFINDEX", "none"), > > + ("PSAMPLE_ATTR_ORIGSIZE", "none"), > > + ("PSAMPLE_ATTR_SAMPLE_GROUP", "uint32"), > > + ("PSAMPLE_ATTR_GROUP_SEQ", "none"), > > + ("PSAMPLE_ATTR_SAMPLE_RATE", "uint32"), > > + ("PSAMPLE_ATTR_DATA", "array(uint8)"), > > + ("PSAMPLE_ATTR_GROUP_REFCOUNT", "none"), > > + ("PSAMPLE_ATTR_TUNNEL", "none"), > > + ("PSAMPLE_ATTR_PAD", "none"), > > + ("PSAMPLE_ATTR_OUT_TC", "none"), > > + ("PSAMPLE_ATTR_OUT_TC_OCC", "none"), > > + ("PSAMPLE_ATTR_LATENCY", "none"), > > + ("PSAMPLE_ATTR_TIMESTAMP", "none"), > > + ("PSAMPLE_ATTR_PROTO", "none"), > > + ("PSAMPLE_ATTR_USER_COOKIE", "array(uint8)"), > > + ) > > + > > + def dpstr(self): > > + fields = [] > > + data = "" > > + for (attr, value) in self["attrs"]: > > + if attr == "PSAMPLE_ATTR_SAMPLE_GROUP": > > + fields.append("group:%d" % value) > > + if attr == "PSAMPLE_ATTR_SAMPLE_RATE": > > + fields.append("rate:%d" % value) > > + if attr == "PSAMPLE_ATTR_USER_COOKIE": > > + value = "".join(format(x, "02x") for x in value) > > + fields.append("cookie:%s" % value) > > + if attr == "PSAMPLE_ATTR_DATA" and len(value) > 0: > > + data = "data:%s" % "".join(format(x, "02x") for x in value) > > + > > + return ("%s %s" % (",".join(fields), data)).strip() > > + > > + > > +class psample_msg(Marshal): > > + PSAMPLE_CMD_SAMPLE = 0 > > + PSAMPLE_CMD_GET_GROUP = 1 > > + PSAMPLE_CMD_NEW_GROUP = 2 > > + PSAMPLE_CMD_DEL_GROUP = 3 > > + PSAMPLE_CMD_SET_FILTER = 4 > > + msg_map = {PSAMPLE_CMD_SAMPLE: psample_sample} > > + > > + > > +class Psample(EventSocket): > > + genl_family = "psample" > > + mcast_groups = ["packets"] > > + marshal_class = psample_msg > > + > > + def read_samples(self): > > + while True: > > + try: > > + for msg in self.get(): > > + print(msg.dpstr(), flush=True) > > + except NetlinkError as ne: > > + raise ne > > > > > > def print_ovsdp_full(dp_lookup_rep, ifindex, ndb=NDB(), vpl=OvsVport()): > > @@ -2247,7 +2342,7 @@ def main(argv): > > help="Increment 'verbose' output counter.", > > default=0, > > ) > > - subparsers = parser.add_subparsers() > > + subparsers = parser.add_subparsers(dest="subcommand") > > > > showdpcmd = subparsers.add_parser("show") > > showdpcmd.add_argument( > > @@ -2304,6 +2399,8 @@ def main(argv): > > delfscmd = subparsers.add_parser("del-flows") > > delfscmd.add_argument("flsbr", help="Datapath name") > > > > + subparsers.add_parser("psample") > > + > > args = parser.parse_args() > > > > if args.verbose > 0: > > @@ -2318,6 +2415,9 @@ def main(argv): > > > > sys.setrecursionlimit(100000) > > > > + if args.subcommand == "psample": > > + Psample().read_samples() > > + > > if hasattr(args, "showdp"): > > found = False > > for iface in ndb.interfaces: >
On Mon, Jun 17, 2024 at 07:18:05AM GMT, Adrián Moreno wrote: > On Fri, Jun 14, 2024 at 01:07:33PM GMT, Aaron Conole wrote: > > Adrian Moreno <amorenoz@redhat.com> writes: > > > > > Add a test to verify sampling packets via psample works. > > > > > > In order to do that, create a subcommand in ovs-dpctl.py to listen to > > > on the psample multicast group and print samples. > > > > > > In order to also test simultaneous sFlow and psample actions and > > > packet truncation, add missing parsing support for "userspace" and > > > "trunc" actions. > > > > Maybe split that into a separate patch. This has a bugfix and 3 > > features being pushed in. I know it's already getting long as a series, > > so maybe it's okay to fold the userspace attribute bugfix with the parse > > support (since it wasn't really usable before). > > > > OK. Sounds reasonable. > > > > Signed-off-by: Adrian Moreno <amorenoz@redhat.com> > > > --- > > > .../selftests/net/openvswitch/openvswitch.sh | 99 +++++++++++++++- > > > .../selftests/net/openvswitch/ovs-dpctl.py | 112 +++++++++++++++++- > > > 2 files changed, 204 insertions(+), 7 deletions(-) > > > > > > diff --git a/tools/testing/selftests/net/openvswitch/openvswitch.sh b/tools/testing/selftests/net/openvswitch/openvswitch.sh > > > index 5cae53543849..f6e0ae3f6424 100755 > > > --- a/tools/testing/selftests/net/openvswitch/openvswitch.sh > > > +++ b/tools/testing/selftests/net/openvswitch/openvswitch.sh > > > @@ -20,7 +20,8 @@ tests=" > > > nat_related_v4 ip4-nat-related: ICMP related matches work with SNAT > > > netlink_checks ovsnl: validate netlink attrs and settings > > > upcall_interfaces ovs: test the upcall interfaces > > > - drop_reason drop: test drop reasons are emitted" > > > + drop_reason drop: test drop reasons are emitted > > > + emit_sample emit_sample: Sampling packets with psample" > > > > > > info() { > > > [ $VERBOSE = 0 ] || echo $* > > > @@ -170,6 +171,19 @@ ovs_drop_reason_count() > > > return `echo "$perf_output" | grep "$pattern" | wc -l` > > > } > > > > > > +ovs_test_flow_fails () { > > > + ERR_MSG="Flow actions may not be safe on all matching packets" > > > + > > > + PRE_TEST=$(dmesg | grep -c "${ERR_MSG}") > > > + ovs_add_flow $@ &> /dev/null $@ && return 1 > > > + POST_TEST=$(dmesg | grep -c "${ERR_MSG}") > > > + > > > + if [ "$PRE_TEST" == "$POST_TEST" ]; then > > > + return 1 > > > + fi > > > + return 0 > > > +} > > > + > > > usage() { > > > echo > > > echo "$0 [OPTIONS] [TEST]..." > > > @@ -184,6 +198,89 @@ usage() { > > > exit 1 > > > } > > > > > > + > > > +# emit_sample test > > > +# - use emit_sample to observe packets > > > +test_emit_sample() { > > > + sbx_add "test_emit_sample" || return $? > > > + > > > + # Add a datapath with per-vport dispatching. > > > + ovs_add_dp "test_emit_sample" emit_sample -V 2:1 || return 1 > > > + > > > + info "create namespaces" > > > + ovs_add_netns_and_veths "test_emit_sample" "emit_sample" \ > > > + client c0 c1 172.31.110.10/24 -u || return 1 > > > + ovs_add_netns_and_veths "test_emit_sample" "emit_sample" \ > > > + server s0 s1 172.31.110.20/24 -u || return 1 > > > + > > > + # Check if emit_sample actions can be configured. > > > + ovs_add_flow "test_emit_sample" emit_sample \ > > > + 'in_port(1),eth(),eth_type(0x0806),arp()' 'emit_sample(group=1)' > > > + if [ $? == 1 ]; then > > > + info "no support for emit_sample - skipping" > > > + ovs_exit_sig > > > + return $ksft_skip > > > + fi > > > + > > > + ovs_del_flows "test_emit_sample" emit_sample > > > + > > > + # Allow ARP > > > + ovs_add_flow "test_emit_sample" emit_sample \ > > > + 'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1 > > > + ovs_add_flow "test_emit_sample" emit_sample \ > > > + 'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1 > > > + > > > + # Test action verification. > > > + OLDIFS=$IFS > > > + IFS='*' > > > + min_key='in_port(1),eth(),eth_type(0x0800),ipv4()' > > > + for testcase in \ > > > + "cookie to large"*"emit_sample(group=1,cookie=1615141312111009080706050403020100)" \ > > > + "no group with cookie"*"emit_sample(cookie=abcd)" \ > > > + "no group"*"sample()"; > > > + do > > > + set -- $testcase; > > > + ovs_test_flow_fails "test_emit_sample" emit_sample $min_key $2 > > > + if [ $? == 1 ]; then > > > + info "failed - $1" > > > + return 1 > > > + fi > > > + done > > > + IFS=$OLDIFS > > > + > > > + # Sample first 14 bytes of all traffic. > > > + ovs_add_flow "test_emit_sample" emit_sample \ > > > + "in_port(1),eth(),eth_type(0x0800),ipv4(src=172.31.110.10,proto=1),icmp()" "trunc(14),emit_sample(group=1,cookie=c0ffee),2" > > > + > > > + # Sample all traffic. In this case, use a sample() action with both > > > + # emit_sample and an upcall emulating simultaneous local sampling and > > > + # sFlow / IPFIX. > > > + nlpid=$(grep -E "listening on upcall packet handler" $ovs_dir/s0.out | cut -d ":" -f 2 | tr -d ' ') > > > + ovs_add_flow "test_emit_sample" emit_sample \ > > > + "in_port(2),eth(),eth_type(0x0800),ipv4(src=172.31.110.20,proto=1),icmp()" "sample(sample=100%,actions(emit_sample(group=2,cookie=eeff0c),userspace(pid=${nlpid},userdata=eeff0c))),1" > > > + > > > + # Record emit_sample data. > > > + python3 $ovs_base/ovs-dpctl.py psample >$ovs_dir/psample.out 2>$ovs_dir/psample.err & > > > + pid=$! > > > + on_exit "ovs_sbx test_emit_sample kill -TERM $pid 2>/dev/null" > > > > Maybe ovs_netns_spawn_daemon ? > > > > I'll take a look at it, thanks. > I've looked into ovs_netns_spawn_daemon and I think it'll not be useful for this command since it needs to run in the default namespace. I can add a new "ovs_spawn_daemon" so it's reusable. WDYT? > [...]
Adrián Moreno <amorenoz@redhat.com> writes: > On Mon, Jun 17, 2024 at 07:18:05AM GMT, Adrián Moreno wrote: >> On Fri, Jun 14, 2024 at 01:07:33PM GMT, Aaron Conole wrote: >> > Adrian Moreno <amorenoz@redhat.com> writes: >> > >> > > Add a test to verify sampling packets via psample works. >> > > >> > > In order to do that, create a subcommand in ovs-dpctl.py to listen to >> > > on the psample multicast group and print samples. >> > > >> > > In order to also test simultaneous sFlow and psample actions and >> > > packet truncation, add missing parsing support for "userspace" and >> > > "trunc" actions. >> > >> > Maybe split that into a separate patch. This has a bugfix and 3 >> > features being pushed in. I know it's already getting long as a series, >> > so maybe it's okay to fold the userspace attribute bugfix with the parse >> > support (since it wasn't really usable before). >> > >> >> OK. Sounds reasonable. >> >> > > Signed-off-by: Adrian Moreno <amorenoz@redhat.com> >> > > --- >> > > .../selftests/net/openvswitch/openvswitch.sh | 99 +++++++++++++++- >> > > .../selftests/net/openvswitch/ovs-dpctl.py | 112 +++++++++++++++++- >> > > 2 files changed, 204 insertions(+), 7 deletions(-) >> > > >> > > diff --git a/tools/testing/selftests/net/openvswitch/openvswitch.sh b/tools/testing/selftests/net/openvswitch/openvswitch.sh >> > > index 5cae53543849..f6e0ae3f6424 100755 >> > > --- a/tools/testing/selftests/net/openvswitch/openvswitch.sh >> > > +++ b/tools/testing/selftests/net/openvswitch/openvswitch.sh >> > > @@ -20,7 +20,8 @@ tests=" >> > > nat_related_v4 ip4-nat-related: ICMP related matches work with SNAT >> > > netlink_checks ovsnl: validate netlink attrs and settings >> > > upcall_interfaces ovs: test the upcall interfaces >> > > - drop_reason drop: test drop reasons are emitted" >> > > + drop_reason drop: test drop reasons are emitted >> > > + emit_sample emit_sample: Sampling packets with psample" >> > > >> > > info() { >> > > [ $VERBOSE = 0 ] || echo $* >> > > @@ -170,6 +171,19 @@ ovs_drop_reason_count() >> > > return `echo "$perf_output" | grep "$pattern" | wc -l` >> > > } >> > > >> > > +ovs_test_flow_fails () { >> > > + ERR_MSG="Flow actions may not be safe on all matching packets" >> > > + >> > > + PRE_TEST=$(dmesg | grep -c "${ERR_MSG}") >> > > + ovs_add_flow $@ &> /dev/null $@ && return 1 >> > > + POST_TEST=$(dmesg | grep -c "${ERR_MSG}") >> > > + >> > > + if [ "$PRE_TEST" == "$POST_TEST" ]; then >> > > + return 1 >> > > + fi >> > > + return 0 >> > > +} >> > > + >> > > usage() { >> > > echo >> > > echo "$0 [OPTIONS] [TEST]..." >> > > @@ -184,6 +198,89 @@ usage() { >> > > exit 1 >> > > } >> > > >> > > + >> > > +# emit_sample test >> > > +# - use emit_sample to observe packets >> > > +test_emit_sample() { >> > > + sbx_add "test_emit_sample" || return $? >> > > + >> > > + # Add a datapath with per-vport dispatching. >> > > + ovs_add_dp "test_emit_sample" emit_sample -V 2:1 || return 1 >> > > + >> > > + info "create namespaces" >> > > + ovs_add_netns_and_veths "test_emit_sample" "emit_sample" \ >> > > + client c0 c1 172.31.110.10/24 -u || return 1 >> > > + ovs_add_netns_and_veths "test_emit_sample" "emit_sample" \ >> > > + server s0 s1 172.31.110.20/24 -u || return 1 >> > > + >> > > + # Check if emit_sample actions can be configured. >> > > + ovs_add_flow "test_emit_sample" emit_sample \ >> > > + 'in_port(1),eth(),eth_type(0x0806),arp()' 'emit_sample(group=1)' >> > > + if [ $? == 1 ]; then >> > > + info "no support for emit_sample - skipping" >> > > + ovs_exit_sig >> > > + return $ksft_skip >> > > + fi >> > > + >> > > + ovs_del_flows "test_emit_sample" emit_sample >> > > + >> > > + # Allow ARP >> > > + ovs_add_flow "test_emit_sample" emit_sample \ >> > > + 'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1 >> > > + ovs_add_flow "test_emit_sample" emit_sample \ >> > > + 'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1 >> > > + >> > > + # Test action verification. >> > > + OLDIFS=$IFS >> > > + IFS='*' >> > > + min_key='in_port(1),eth(),eth_type(0x0800),ipv4()' >> > > + for testcase in \ >> > > + "cookie to large"*"emit_sample(group=1,cookie=1615141312111009080706050403020100)" \ >> > > + "no group with cookie"*"emit_sample(cookie=abcd)" \ >> > > + "no group"*"sample()"; >> > > + do >> > > + set -- $testcase; >> > > + ovs_test_flow_fails "test_emit_sample" emit_sample $min_key $2 >> > > + if [ $? == 1 ]; then >> > > + info "failed - $1" >> > > + return 1 >> > > + fi >> > > + done >> > > + IFS=$OLDIFS >> > > + >> > > + # Sample first 14 bytes of all traffic. >> > > + ovs_add_flow "test_emit_sample" emit_sample \ >> > > + "in_port(1),eth(),eth_type(0x0800),ipv4(src=172.31.110.10,proto=1),icmp()" "trunc(14),emit_sample(group=1,cookie=c0ffee),2" >> > > + >> > > + # Sample all traffic. In this case, use a sample() action with both >> > > + # emit_sample and an upcall emulating simultaneous local sampling and >> > > + # sFlow / IPFIX. >> > > + nlpid=$(grep -E "listening on upcall packet handler" $ovs_dir/s0.out | cut -d ":" -f 2 | tr -d ' ') >> > > + ovs_add_flow "test_emit_sample" emit_sample \ >> > > + "in_port(2),eth(),eth_type(0x0800),ipv4(src=172.31.110.20,proto=1),icmp()" "sample(sample=100%,actions(emit_sample(group=2,cookie=eeff0c),userspace(pid=${nlpid},userdata=eeff0c))),1" >> > > + >> > > + # Record emit_sample data. >> > > + python3 $ovs_base/ovs-dpctl.py psample >$ovs_dir/psample.out 2>$ovs_dir/psample.err & >> > > + pid=$! >> > > + on_exit "ovs_sbx test_emit_sample kill -TERM $pid 2>/dev/null" >> > >> > Maybe ovs_netns_spawn_daemon ? >> > >> >> I'll take a look at it, thanks. >> > > I've looked into ovs_netns_spawn_daemon and I think it'll not be useful > for this command since it needs to run in the default namespace. I can > add a new "ovs_spawn_daemon" so it's reusable. WDYT? Okay >> [...]
diff --git a/tools/testing/selftests/net/openvswitch/openvswitch.sh b/tools/testing/selftests/net/openvswitch/openvswitch.sh index 5cae53543849..f6e0ae3f6424 100755 --- a/tools/testing/selftests/net/openvswitch/openvswitch.sh +++ b/tools/testing/selftests/net/openvswitch/openvswitch.sh @@ -20,7 +20,8 @@ tests=" nat_related_v4 ip4-nat-related: ICMP related matches work with SNAT netlink_checks ovsnl: validate netlink attrs and settings upcall_interfaces ovs: test the upcall interfaces - drop_reason drop: test drop reasons are emitted" + drop_reason drop: test drop reasons are emitted + emit_sample emit_sample: Sampling packets with psample" info() { [ $VERBOSE = 0 ] || echo $* @@ -170,6 +171,19 @@ ovs_drop_reason_count() return `echo "$perf_output" | grep "$pattern" | wc -l` } +ovs_test_flow_fails () { + ERR_MSG="Flow actions may not be safe on all matching packets" + + PRE_TEST=$(dmesg | grep -c "${ERR_MSG}") + ovs_add_flow $@ &> /dev/null $@ && return 1 + POST_TEST=$(dmesg | grep -c "${ERR_MSG}") + + if [ "$PRE_TEST" == "$POST_TEST" ]; then + return 1 + fi + return 0 +} + usage() { echo echo "$0 [OPTIONS] [TEST]..." @@ -184,6 +198,89 @@ usage() { exit 1 } + +# emit_sample test +# - use emit_sample to observe packets +test_emit_sample() { + sbx_add "test_emit_sample" || return $? + + # Add a datapath with per-vport dispatching. + ovs_add_dp "test_emit_sample" emit_sample -V 2:1 || return 1 + + info "create namespaces" + ovs_add_netns_and_veths "test_emit_sample" "emit_sample" \ + client c0 c1 172.31.110.10/24 -u || return 1 + ovs_add_netns_and_veths "test_emit_sample" "emit_sample" \ + server s0 s1 172.31.110.20/24 -u || return 1 + + # Check if emit_sample actions can be configured. + ovs_add_flow "test_emit_sample" emit_sample \ + 'in_port(1),eth(),eth_type(0x0806),arp()' 'emit_sample(group=1)' + if [ $? == 1 ]; then + info "no support for emit_sample - skipping" + ovs_exit_sig + return $ksft_skip + fi + + ovs_del_flows "test_emit_sample" emit_sample + + # Allow ARP + ovs_add_flow "test_emit_sample" emit_sample \ + 'in_port(1),eth(),eth_type(0x0806),arp()' '2' || return 1 + ovs_add_flow "test_emit_sample" emit_sample \ + 'in_port(2),eth(),eth_type(0x0806),arp()' '1' || return 1 + + # Test action verification. + OLDIFS=$IFS + IFS='*' + min_key='in_port(1),eth(),eth_type(0x0800),ipv4()' + for testcase in \ + "cookie to large"*"emit_sample(group=1,cookie=1615141312111009080706050403020100)" \ + "no group with cookie"*"emit_sample(cookie=abcd)" \ + "no group"*"sample()"; + do + set -- $testcase; + ovs_test_flow_fails "test_emit_sample" emit_sample $min_key $2 + if [ $? == 1 ]; then + info "failed - $1" + return 1 + fi + done + IFS=$OLDIFS + + # Sample first 14 bytes of all traffic. + ovs_add_flow "test_emit_sample" emit_sample \ + "in_port(1),eth(),eth_type(0x0800),ipv4(src=172.31.110.10,proto=1),icmp()" "trunc(14),emit_sample(group=1,cookie=c0ffee),2" + + # Sample all traffic. In this case, use a sample() action with both + # emit_sample and an upcall emulating simultaneous local sampling and + # sFlow / IPFIX. + nlpid=$(grep -E "listening on upcall packet handler" $ovs_dir/s0.out | cut -d ":" -f 2 | tr -d ' ') + ovs_add_flow "test_emit_sample" emit_sample \ + "in_port(2),eth(),eth_type(0x0800),ipv4(src=172.31.110.20,proto=1),icmp()" "sample(sample=100%,actions(emit_sample(group=2,cookie=eeff0c),userspace(pid=${nlpid},userdata=eeff0c))),1" + + # Record emit_sample data. + python3 $ovs_base/ovs-dpctl.py psample >$ovs_dir/psample.out 2>$ovs_dir/psample.err & + pid=$! + on_exit "ovs_sbx test_emit_sample kill -TERM $pid 2>/dev/null" + + # Send a single ping. + sleep 1 + ovs_sbx "test_emit_sample" ip netns exec client ping -I c1 172.31.110.20 -c 1 || return 1 + sleep 1 + + # We should have received one userspace action upcall and 2 psample packets. + grep -E "userspace action command" $ovs_dir/s0.out >/dev/null 2>&1 || return 1 + + # client -> server samples should only contain the first 14 bytes of the packet. + grep -E "rate:4294967295,group:1,cookie:c0ffee data:[0-9a-f]{28}$" \ + $ovs_dir/psample.out >/dev/null 2>&1 || return 1 + grep -E "rate:4294967295,group:2,cookie:eeff0c" \ + $ovs_dir/psample.out >/dev/null 2>&1 || return 1 + + return 0 +} + # drop_reason test # - drop packets and verify the right drop reason is reported test_drop_reason() { diff --git a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py index f8b5362aac8c..44fdeb9491a2 100644 --- a/tools/testing/selftests/net/openvswitch/ovs-dpctl.py +++ b/tools/testing/selftests/net/openvswitch/ovs-dpctl.py @@ -27,8 +27,10 @@ try: from pyroute2.netlink import genlmsg from pyroute2.netlink import nla from pyroute2.netlink import nlmsg_atoms - from pyroute2.netlink.exceptions import NetlinkError + from pyroute2.netlink.event import EventSocket from pyroute2.netlink.generic import GenericNetlinkSocket + from pyroute2.netlink.nlsocket import Marshal + from pyroute2.netlink.exceptions import NetlinkError import pyroute2 except ModuleNotFoundError: @@ -575,13 +577,27 @@ class ovsactions(nla): print_str += "userdata=" for f in self.get_attr("OVS_USERSPACE_ATTR_USERDATA"): print_str += "%x." % f - if self.get_attr("OVS_USERSPACE_ATTR_TUN_PORT") is not None: + if self.get_attr("OVS_USERSPACE_ATTR_EGRESS_TUN_PORT") is not None: print_str += "egress_tun_port=%d" % self.get_attr( - "OVS_USERSPACE_ATTR_TUN_PORT" + "OVS_USERSPACE_ATTR_EGRESS_TUN_PORT" ) print_str += ")" return print_str + def parse(self, actstr): + attrs_desc = ( + ("pid", "OVS_USERSPACE_ATTR_PID", int), + ("userdata", "OVS_USERSPACE_ATTR_USERDATA", + lambda x: list(bytearray.fromhex(x))), + ("egress_tun_port", "OVS_USERSPACE_ATTR_EGRESS_TUN_PORT", int) + ) + + attrs, actstr = parse_attrs(actstr, attrs_desc) + for attr in attrs: + self["attrs"].append(attr) + + return actstr + def dpstr(self, more=False): print_str = "" @@ -803,6 +819,25 @@ class ovsactions(nla): self["attrs"].append(["OVS_ACTION_ATTR_EMIT_SAMPLE", emitact]) parsed = True + elif parse_starts_block(actstr, "userspace(", False): + uact = self.userspace() + actstr = uact.parse(actstr[len("userpsace(") : ]) + self["attrs"].append(["OVS_ACTION_ATTR_USERSPACE", uact]) + parsed = True + + elif parse_starts_block(actstr, "trunc", False): + parencount += 1 + actstr, val = parse_extract_field( + actstr, + "trunc(", + r"([0-9]+)", + int, + False, + None, + ) + self["attrs"].append(["OVS_ACTION_ATTR_TRUNC", val]) + parsed = True + actstr = actstr[strspn(actstr, ", ") :] while parencount > 0: parencount -= 1 @@ -2184,10 +2219,70 @@ class OvsFlow(GenericNetlinkSocket): print("MISS upcall[%d/%s]: %s" % (seq, pktpres, keystr), flush=True) def execute(self, packetmsg): - print("userspace execute command") + print("userspace execute command", flush=True) def action(self, packetmsg): - print("userspace action command") + print("userspace action command", flush=True) + + +class psample_sample(genlmsg): + nla_map = ( + ("PSAMPLE_ATTR_IIFINDEX", "none"), + ("PSAMPLE_ATTR_OIFINDEX", "none"), + ("PSAMPLE_ATTR_ORIGSIZE", "none"), + ("PSAMPLE_ATTR_SAMPLE_GROUP", "uint32"), + ("PSAMPLE_ATTR_GROUP_SEQ", "none"), + ("PSAMPLE_ATTR_SAMPLE_RATE", "uint32"), + ("PSAMPLE_ATTR_DATA", "array(uint8)"), + ("PSAMPLE_ATTR_GROUP_REFCOUNT", "none"), + ("PSAMPLE_ATTR_TUNNEL", "none"), + ("PSAMPLE_ATTR_PAD", "none"), + ("PSAMPLE_ATTR_OUT_TC", "none"), + ("PSAMPLE_ATTR_OUT_TC_OCC", "none"), + ("PSAMPLE_ATTR_LATENCY", "none"), + ("PSAMPLE_ATTR_TIMESTAMP", "none"), + ("PSAMPLE_ATTR_PROTO", "none"), + ("PSAMPLE_ATTR_USER_COOKIE", "array(uint8)"), + ) + + def dpstr(self): + fields = [] + data = "" + for (attr, value) in self["attrs"]: + if attr == "PSAMPLE_ATTR_SAMPLE_GROUP": + fields.append("group:%d" % value) + if attr == "PSAMPLE_ATTR_SAMPLE_RATE": + fields.append("rate:%d" % value) + if attr == "PSAMPLE_ATTR_USER_COOKIE": + value = "".join(format(x, "02x") for x in value) + fields.append("cookie:%s" % value) + if attr == "PSAMPLE_ATTR_DATA" and len(value) > 0: + data = "data:%s" % "".join(format(x, "02x") for x in value) + + return ("%s %s" % (",".join(fields), data)).strip() + + +class psample_msg(Marshal): + PSAMPLE_CMD_SAMPLE = 0 + PSAMPLE_CMD_GET_GROUP = 1 + PSAMPLE_CMD_NEW_GROUP = 2 + PSAMPLE_CMD_DEL_GROUP = 3 + PSAMPLE_CMD_SET_FILTER = 4 + msg_map = {PSAMPLE_CMD_SAMPLE: psample_sample} + + +class Psample(EventSocket): + genl_family = "psample" + mcast_groups = ["packets"] + marshal_class = psample_msg + + def read_samples(self): + while True: + try: + for msg in self.get(): + print(msg.dpstr(), flush=True) + except NetlinkError as ne: + raise ne def print_ovsdp_full(dp_lookup_rep, ifindex, ndb=NDB(), vpl=OvsVport()): @@ -2247,7 +2342,7 @@ def main(argv): help="Increment 'verbose' output counter.", default=0, ) - subparsers = parser.add_subparsers() + subparsers = parser.add_subparsers(dest="subcommand") showdpcmd = subparsers.add_parser("show") showdpcmd.add_argument( @@ -2304,6 +2399,8 @@ def main(argv): delfscmd = subparsers.add_parser("del-flows") delfscmd.add_argument("flsbr", help="Datapath name") + subparsers.add_parser("psample") + args = parser.parse_args() if args.verbose > 0: @@ -2318,6 +2415,9 @@ def main(argv): sys.setrecursionlimit(100000) + if args.subcommand == "psample": + Psample().read_samples() + if hasattr(args, "showdp"): found = False for iface in ndb.interfaces:
Add a test to verify sampling packets via psample works. In order to do that, create a subcommand in ovs-dpctl.py to listen to on the psample multicast group and print samples. In order to also test simultaneous sFlow and psample actions and packet truncation, add missing parsing support for "userspace" and "trunc" actions. Signed-off-by: Adrian Moreno <amorenoz@redhat.com> --- .../selftests/net/openvswitch/openvswitch.sh | 99 +++++++++++++++- .../selftests/net/openvswitch/ovs-dpctl.py | 112 +++++++++++++++++- 2 files changed, 204 insertions(+), 7 deletions(-)