Commit f7bf624b authored by Toke Høiland-Jørgensen's avatar Toke Høiland-Jørgensen Committed by Jakub Kicinski
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selftests/net: Add test for loading devbound XDP program in generic mode 



Add a test to bpf_offload.py for loading a devbound XDP program in
generic mode, checking that it fails correctly.

Signed-off-by: default avatarToke Høiland-Jørgensen <toke@redhat.com>
Acked-by: default avatarStanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20250127131344.238147-2-toke@redhat.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 3595599f

tools/testing/selftests/net/bpf_offload.py

+13 −1
Original line number Diff line number Diff line
@@ -215,12 +215,14 @@ def bpftool_map_list_wait(expected=0, n_retry=20, ns=""): 
    raise Exception("Time out waiting for map counts to stabilize want %d, have %d" % (expected, nmaps))



def bpftool_prog_load(sample, file_name, maps=[], prog_type="xdp", dev=None,

                      fail=True, include_stderr=False):

                      fail=True, include_stderr=False, dev_bind=None):

    args = "prog load %s %s" % (os.path.join(bpf_test_dir, sample), file_name)

    if prog_type is not None:

        args += " type " + prog_type

    if dev is not None:

        args += " dev " + dev

    elif dev_bind is not None:

        args += " xdpmeta_dev " + dev_bind

    if len(maps):

        args += " map " + " map ".join(maps)
@@ -980,6 +982,16 @@ try: 
    rm("/sys/fs/bpf/offload")

    sim.wait_for_flush()



    bpftool_prog_load("sample_ret0.bpf.o", "/sys/fs/bpf/devbound",

                      dev_bind=sim['ifname'])

    devbound = bpf_pinned("/sys/fs/bpf/devbound")

    start_test("Test dev-bound program in generic mode...")

    ret, _, err = sim.set_xdp(devbound, "generic", fail=False, include_stderr=True)

    fail(ret == 0, "devbound program in generic mode allowed")

    check_extack(err, "Can't attach device-bound programs in generic mode.", args)

    rm("/sys/fs/bpf/devbound")

    sim.wait_for_flush()



    start_test("Test XDP load failure...")

    sim.dfs["dev/bpf_bind_verifier_accept"] = 0

    ret, _, err = bpftool_prog_load("sample_ret0.bpf.o", "/sys/fs/bpf/offload",