diff options
Diffstat (limited to 'tools')
-rwxr-xr-x | tools/testing/selftests/bpf/test_offload.py | 216 |
1 files changed, 186 insertions, 30 deletions
diff --git a/tools/testing/selftests/bpf/test_offload.py b/tools/testing/selftests/bpf/test_offload.py index 833b9c1ec450..e78aad0a68bb 100755 --- a/tools/testing/selftests/bpf/test_offload.py +++ b/tools/testing/selftests/bpf/test_offload.py @@ -26,6 +26,7 @@ import time logfile = None log_level = 1 +skip_extack = False bpf_test_dir = os.path.dirname(os.path.realpath(__file__)) pp = pprint.PrettyPrinter() devs = [] # devices we created for clean up @@ -132,7 +133,7 @@ def rm(f): if f in files: files.remove(f) -def tool(name, args, flags, JSON=True, ns="", fail=True): +def tool(name, args, flags, JSON=True, ns="", fail=True, include_stderr=False): params = "" if JSON: params += "%s " % (flags["json"]) @@ -140,9 +141,20 @@ def tool(name, args, flags, JSON=True, ns="", fail=True): if ns != "": ns = "ip netns exec %s " % (ns) - ret, out = cmd(ns + name + " " + params + args, fail=fail) - if JSON and len(out.strip()) != 0: - return ret, json.loads(out) + if include_stderr: + ret, stdout, stderr = cmd(ns + name + " " + params + args, + fail=fail, include_stderr=True) + else: + ret, stdout = cmd(ns + name + " " + params + args, + fail=fail, include_stderr=False) + + if JSON and len(stdout.strip()) != 0: + out = json.loads(stdout) + else: + out = stdout + + if include_stderr: + return ret, out, stderr else: return ret, out @@ -181,13 +193,15 @@ def bpftool_map_list_wait(expected=0, n_retry=20): time.sleep(0.05) raise Exception("Time out waiting for map counts to stabilize want %d, have %d" % (expected, nmaps)) -def ip(args, force=False, JSON=True, ns="", fail=True): +def ip(args, force=False, JSON=True, ns="", fail=True, include_stderr=False): if force: args = "-force " + args - return tool("ip", args, {"json":"-j"}, JSON=JSON, ns=ns, fail=fail) + return tool("ip", args, {"json":"-j"}, JSON=JSON, ns=ns, + fail=fail, include_stderr=include_stderr) -def tc(args, JSON=True, ns="", fail=True): - return tool("tc", args, {"json":"-p"}, JSON=JSON, ns=ns, fail=fail) +def tc(args, JSON=True, ns="", fail=True, include_stderr=False): + return tool("tc", args, {"json":"-p"}, JSON=JSON, ns=ns, + fail=fail, include_stderr=include_stderr) def ethtool(dev, opt, args, fail=True): return cmd("ethtool %s %s %s" % (opt, dev["ifname"], args), fail=fail) @@ -348,13 +362,19 @@ class NetdevSim: return ip("link set dev %s mtu %d" % (self.dev["ifname"], mtu), fail=fail) - def set_xdp(self, bpf, mode, force=False, JSON=True, fail=True): + def set_xdp(self, bpf, mode, force=False, JSON=True, verbose=False, + fail=True, include_stderr=False): + if verbose: + bpf += " verbose" return ip("link set dev %s xdp%s %s" % (self.dev["ifname"], mode, bpf), - force=force, JSON=JSON, fail=fail) + force=force, JSON=JSON, + fail=fail, include_stderr=include_stderr) - def unset_xdp(self, mode, force=False, JSON=True, fail=True): + def unset_xdp(self, mode, force=False, JSON=True, + fail=True, include_stderr=False): return ip("link set dev %s xdp%s off" % (self.dev["ifname"], mode), - force=force, JSON=JSON, fail=fail) + force=force, JSON=JSON, + fail=fail, include_stderr=include_stderr) def ip_link_show(self, xdp): _, link = ip("link show dev %s" % (self['ifname'])) @@ -409,17 +429,41 @@ class NetdevSim: (len(filters), expected)) return filters - def cls_bpf_add_filter(self, bpf, da=False, skip_sw=False, skip_hw=False, - fail=True): + def cls_filter_op(self, op, qdisc="ingress", prio=None, handle=None, + chain=None, cls="", params="", + fail=True, include_stderr=False): + spec = "" + if prio is not None: + spec += " prio %d" % (prio) + if handle: + spec += " handle %s" % (handle) + if chain is not None: + spec += " chain %d" % (chain) + + return tc("filter {op} dev {dev} {qdisc} {spec} {cls} {params}"\ + .format(op=op, dev=self['ifname'], qdisc=qdisc, spec=spec, + cls=cls, params=params), + fail=fail, include_stderr=include_stderr) + + def cls_bpf_add_filter(self, bpf, op="add", prio=None, handle=None, + chain=None, da=False, verbose=False, + skip_sw=False, skip_hw=False, + fail=True, include_stderr=False): + cls = "bpf " + bpf + params = "" if da: params += " da" + if verbose: + params += " verbose" if skip_sw: params += " skip_sw" if skip_hw: params += " skip_hw" - return tc("filter add dev %s ingress bpf %s %s" % - (self['ifname'], bpf, params), fail=fail) + + return self.cls_filter_op(op=op, prio=prio, handle=handle, cls=cls, + chain=chain, params=params, + fail=fail, include_stderr=include_stderr) def set_ethtool_tc_offloads(self, enable, fail=True): args = "hw-tc-offload %s" % ("on" if enable else "off") @@ -491,6 +535,39 @@ def check_dev_info(other_ns, ns, prog_file=None, map_file=None, removed=False): fail("dev" not in m.keys(), "Device parameters not reported") fail(dev != m["dev"], "Map's device different than program's") +def check_extack(output, reference, args): + if skip_extack: + return + lines = output.split("\n") + comp = len(lines) >= 2 and lines[1] == reference + fail(not comp, "Missing or incorrect netlink extack message") + +def check_extack_nsim(output, reference, args): + check_extack(output, "Error: netdevsim: " + reference, args) + +def check_no_extack(res, needle): + fail((res[1] + res[2]).count(needle) or (res[1] + res[2]).count("Warning:"), + "Found '%s' in command output, leaky extack?" % (needle)) + +def check_verifier_log(output, reference): + lines = output.split("\n") + for l in reversed(lines): + if l == reference: + return + fail(True, "Missing or incorrect message from netdevsim in verifier log") + +def test_spurios_extack(sim, obj, skip_hw, needle): + res = sim.cls_bpf_add_filter(obj, prio=1, handle=1, skip_hw=skip_hw, + include_stderr=True) + check_no_extack(res, needle) + res = sim.cls_bpf_add_filter(obj, op="replace", prio=1, handle=1, + skip_hw=skip_hw, include_stderr=True) + check_no_extack(res, needle) + res = sim.cls_filter_op(op="delete", prio=1, handle=1, cls="bpf", + include_stderr=True) + check_no_extack(res, needle) + + # Parse command line parser = argparse.ArgumentParser() parser.add_argument("--log", help="output verbose log to given file") @@ -527,6 +604,14 @@ for s in samples: skip(ret != 0, "sample %s/%s not found, please compile it" % (bpf_test_dir, s)) +# Check if iproute2 is built with libmnl (needed by extack support) +_, _, err = cmd("tc qdisc delete dev lo handle 0", + fail=False, include_stderr=True) +if err.find("Error: Failed to find qdisc with specified handle.") == -1: + print("Warning: no extack message in iproute2 output, libmnl missing?") + log("Warning: no extack message in iproute2 output, libmnl missing?", "") + skip_extack = True + # Check if net namespaces seem to work ns = mknetns() skip(ns is None, "Could not create a net namespace") @@ -558,8 +643,10 @@ try: sim.tc_flush_filters() start_test("Test TC offloads are off by default...") - ret, _ = sim.cls_bpf_add_filter(obj, skip_sw=True, fail=False) + ret, _, err = sim.cls_bpf_add_filter(obj, skip_sw=True, + fail=False, include_stderr=True) fail(ret == 0, "TC filter loaded without enabling TC offloads") + check_extack(err, "Error: TC offload is disabled on net device.", args) sim.wait_for_flush() sim.set_ethtool_tc_offloads(True) @@ -587,13 +674,63 @@ try: sim.dfs["bpf_tc_non_bound_accept"] = "N" start_test("Test TC cBPF unbound bytecode doesn't offload...") - ret, _ = sim.cls_bpf_add_filter(bytecode, skip_sw=True, fail=False) + ret, _, err = sim.cls_bpf_add_filter(bytecode, skip_sw=True, + fail=False, include_stderr=True) fail(ret == 0, "TC bytecode loaded for offload") + check_extack_nsim(err, "netdevsim configured to reject unbound programs.", + args) sim.wait_for_flush() + start_test("Test non-0 chain offload...") + ret, _, err = sim.cls_bpf_add_filter(obj, chain=1, prio=1, handle=1, + skip_sw=True, + fail=False, include_stderr=True) + fail(ret == 0, "Offloaded a filter to chain other than 0") + check_extack(err, "Error: Driver supports only offload of chain 0.", args) + sim.tc_flush_filters() + + start_test("Test TC replace...") + sim.cls_bpf_add_filter(obj, prio=1, handle=1) + sim.cls_bpf_add_filter(obj, op="replace", prio=1, handle=1) + sim.cls_filter_op(op="delete", prio=1, handle=1, cls="bpf") + + sim.cls_bpf_add_filter(obj, prio=1, handle=1, skip_sw=True) + sim.cls_bpf_add_filter(obj, op="replace", prio=1, handle=1, skip_sw=True) + sim.cls_filter_op(op="delete", prio=1, handle=1, cls="bpf") + + sim.cls_bpf_add_filter(obj, prio=1, handle=1, skip_hw=True) + sim.cls_bpf_add_filter(obj, op="replace", prio=1, handle=1, skip_hw=True) + sim.cls_filter_op(op="delete", prio=1, handle=1, cls="bpf") + + start_test("Test TC replace bad flags...") + for i in range(3): + for j in range(3): + ret, _ = sim.cls_bpf_add_filter(obj, op="replace", prio=1, handle=1, + skip_sw=(j == 1), skip_hw=(j == 2), + fail=False) + fail(bool(ret) != bool(j), + "Software TC incorrect load in replace test, iteration %d" % + (j)) + sim.cls_filter_op(op="delete", prio=1, handle=1, cls="bpf") + + start_test("Test spurious extack from the driver...") + test_spurios_extack(sim, obj, False, "netdevsim") + test_spurios_extack(sim, obj, True, "netdevsim") + + sim.set_ethtool_tc_offloads(False) + + test_spurios_extack(sim, obj, False, "TC offload is disabled") + test_spurios_extack(sim, obj, True, "TC offload is disabled") + + sim.set_ethtool_tc_offloads(True) + + sim.tc_flush_filters() + start_test("Test TC offloads work...") - ret, _ = sim.cls_bpf_add_filter(obj, skip_sw=True, fail=False) + ret, _, err = sim.cls_bpf_add_filter(obj, verbose=True, skip_sw=True, + fail=False, include_stderr=True) fail(ret != 0, "TC filter did not load with TC offloads enabled") + check_verifier_log(err, "[netdevsim] Hello from netdevsim!") start_test("Test TC offload basics...") dfs = sim.dfs_get_bound_progs(expected=1) @@ -669,16 +806,24 @@ try: "Device parameters reported for non-offloaded program") start_test("Test XDP prog replace with bad flags...") - ret, _ = sim.set_xdp(obj, "offload", force=True, fail=False) + ret, _, err = sim.set_xdp(obj, "offload", force=True, + fail=False, include_stderr=True) fail(ret == 0, "Replaced XDP program with a program in different mode") - ret, _ = sim.set_xdp(obj, "", force=True, fail=False) + check_extack_nsim(err, "program loaded with different flags.", args) + ret, _, err = sim.set_xdp(obj, "", force=True, + fail=False, include_stderr=True) fail(ret == 0, "Replaced XDP program with a program in different mode") + check_extack_nsim(err, "program loaded with different flags.", args) start_test("Test XDP prog remove with bad flags...") - ret, _ = sim.unset_xdp("offload", force=True, fail=False) + ret, _, err = sim.unset_xdp("offload", force=True, + fail=False, include_stderr=True) fail(ret == 0, "Removed program with a bad mode mode") - ret, _ = sim.unset_xdp("", force=True, fail=False) + check_extack_nsim(err, "program loaded with different flags.", args) + ret, _, err = sim.unset_xdp("", force=True, + fail=False, include_stderr=True) fail(ret == 0, "Removed program with a bad mode mode") + check_extack_nsim(err, "program loaded with different flags.", args) start_test("Test MTU restrictions...") ret, _ = sim.set_mtu(9000, fail=False) @@ -687,18 +832,20 @@ try: sim.unset_xdp("drv") bpftool_prog_list_wait(expected=0) sim.set_mtu(9000) - ret, _ = sim.set_xdp(obj, "drv", fail=False) + ret, _, err = sim.set_xdp(obj, "drv", fail=False, include_stderr=True) fail(ret == 0, "Driver should refuse to load program with MTU of 9000...") + check_extack_nsim(err, "MTU too large w/ XDP enabled.", args) sim.set_mtu(1500) sim.wait_for_flush() start_test("Test XDP offload...") - sim.set_xdp(obj, "offload") + _, _, err = sim.set_xdp(obj, "offload", verbose=True, include_stderr=True) ipl = sim.ip_link_show(xdp=True) link_xdp = ipl["xdp"]["prog"] progs = bpftool_prog_list(expected=1) prog = progs[0] fail(link_xdp["id"] != prog["id"], "Loaded program has wrong ID") + check_verifier_log(err, "[netdevsim] Hello from netdevsim!") start_test("Test XDP offload is device bound...") dfs = sim.dfs_get_bound_progs(expected=1) @@ -724,25 +871,32 @@ try: sim2.set_xdp(obj, "offload") pin_file, pinned = pin_prog("/sys/fs/bpf/tmp") - ret, _ = sim.set_xdp(pinned, "offload", fail=False) + ret, _, err = sim.set_xdp(pinned, "offload", + fail=False, include_stderr=True) fail(ret == 0, "Pinned program loaded for a different device accepted") + check_extack_nsim(err, "program bound to different dev.", args) sim2.remove() - ret, _ = sim.set_xdp(pinned, "offload", fail=False) + ret, _, err = sim.set_xdp(pinned, "offload", + fail=False, include_stderr=True) fail(ret == 0, "Pinned program loaded for a removed device accepted") + check_extack_nsim(err, "xdpoffload of non-bound program.", args) rm(pin_file) bpftool_prog_list_wait(expected=0) start_test("Test mixing of TC and XDP...") sim.tc_add_ingress() sim.set_xdp(obj, "offload") - ret, _ = sim.cls_bpf_add_filter(obj, skip_sw=True, fail=False) + ret, _, err = sim.cls_bpf_add_filter(obj, skip_sw=True, + fail=False, include_stderr=True) fail(ret == 0, "Loading TC when XDP active should fail") + check_extack_nsim(err, "driver and netdev offload states mismatch.", args) sim.unset_xdp("offload") sim.wait_for_flush() sim.cls_bpf_add_filter(obj, skip_sw=True) - ret, _ = sim.set_xdp(obj, "offload", fail=False) + ret, _, err = sim.set_xdp(obj, "offload", fail=False, include_stderr=True) fail(ret == 0, "Loading XDP when TC active should fail") + check_extack_nsim(err, "TC program is already loaded.", args) start_test("Test binding TC from pinned...") pin_file, pinned = pin_prog("/sys/fs/bpf/tmp") @@ -765,8 +919,10 @@ try: start_test("Test asking for TC offload of two filters...") sim.cls_bpf_add_filter(obj, da=True, skip_sw=True) - ret, _ = sim.cls_bpf_add_filter(obj, da=True, skip_sw=True, fail=False) + ret, _, err = sim.cls_bpf_add_filter(obj, da=True, skip_sw=True, + fail=False, include_stderr=True) fail(ret == 0, "Managed to offload two TC filters at the same time") + check_extack_nsim(err, "driver and netdev offload states mismatch.", args) sim.tc_flush_filters(bound=2, total=2) |