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Commit 99dadb6e authored by Jakub Kicinski's avatar Jakub Kicinski Committed by Daniel Borkmann
Browse files

selftests/bpf: add test for multiple programs 



Add tests for having an XDP program attached in the driver and
another one attached in HW simultaneously.

Signed-off-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: default avatarQuentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent 799e173d

tools/testing/selftests/bpf/test_offload.py

+63 −0
Original line number Diff line number Diff line
@@ -339,6 +339,11 @@ class NetdevSim: 
        self.dfs = DebugfsDir(self.dfs_dir)

        return self.dfs



    def dfs_read(self, f):

        path = os.path.join(self.dfs_dir, f)

        _, data = cmd('cat %s' % (path))

        return data.strip()



    def dfs_num_bound_progs(self):

        path = os.path.join(self.dfs_dir, "bpf_bound_progs")

        _, progs = cmd('ls %s' % (path))
@@ -814,6 +819,10 @@ try: 
         "Device parameters reported for non-offloaded program")



    start_test("Test XDP prog replace with bad flags...")

    ret, _, err = sim.set_xdp(obj, "generic", force=True,

                              fail=False, include_stderr=True)

    fail(ret == 0, "Replaced XDP program with a program in different mode")

    fail(err.count("File exists") != 1, "Replaced driver XDP with generic")

    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")
@@ -883,6 +892,60 @@ try: 
    rm(pin_file)

    bpftool_prog_list_wait(expected=0)



    start_test("Test multi-attachment XDP - attach...")

    sim.set_xdp(obj, "offload")

    xdp = sim.ip_link_show(xdp=True)["xdp"]

    offloaded = sim.dfs_read("bpf_offloaded_id")

    fail("prog" not in xdp, "Base program not reported in single program mode")

    fail(len(ipl["xdp"]["attached"]) != 1,

         "Wrong attached program count with one program")



    sim.set_xdp(obj, "")

    two_xdps = sim.ip_link_show(xdp=True)["xdp"]

    offloaded2 = sim.dfs_read("bpf_offloaded_id")



    fail(two_xdps["mode"] != 4, "Bad mode reported with multiple programs")

    fail("prog" in two_xdps, "Base program reported in multi program mode")

    fail(xdp["attached"][0] not in two_xdps["attached"],

         "Offload program not reported after driver activated")

    fail(len(two_xdps["attached"]) != 2,

         "Wrong attached program count with two programs")

    fail(two_xdps["attached"][0]["prog"]["id"] ==

         two_xdps["attached"][1]["prog"]["id"],

         "offloaded and drv programs have the same id")

    fail(offloaded != offloaded2,

         "offload ID changed after loading driver program")



    start_test("Test multi-attachment XDP - replace...")

    ret, _, err = sim.set_xdp(obj, "offload", fail=False, include_stderr=True)

    fail(err.count("busy") != 1, "Replaced one of programs without -force")



    start_test("Test multi-attachment XDP - detach...")

    ret, _, err = sim.unset_xdp("drv", force=True,

                                fail=False, include_stderr=True)

    fail(ret == 0, "Removed program with a bad mode")

    check_extack(err, "program loaded with different flags.", args)



    sim.unset_xdp("offload")

    xdp = sim.ip_link_show(xdp=True)["xdp"]

    offloaded = sim.dfs_read("bpf_offloaded_id")



    fail(xdp["mode"] != 1, "Bad mode reported after multiple programs")

    fail("prog" not in xdp,

         "Base program not reported after multi program mode")

    fail(xdp["attached"][0] not in two_xdps["attached"],

         "Offload program not reported after driver activated")

    fail(len(ipl["xdp"]["attached"]) != 1,

         "Wrong attached program count with remaining programs")

    fail(offloaded != "0", "offload ID reported with only driver program left")



    start_test("Test multi-attachment XDP - device remove...")

    sim.set_xdp(obj, "offload")

    sim.remove()



    sim = NetdevSim()

    sim.set_ethtool_tc_offloads(True)



    start_test("Test mixing of TC and XDP...")

    sim.tc_add_ingress()

    sim.set_xdp(obj, "offload")