forked from Minki/linux
selftests/bpf: add test for sharing objects between netdevs
Add tests for sharing programs and maps between different netdevs. Use netdevsim's ability to pretend multiple netdevs belong to the same "ASIC". Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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@ -158,8 +158,9 @@ def tool(name, args, flags, JSON=True, ns="", fail=True, include_stderr=False):
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else:
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return ret, out
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def bpftool(args, JSON=True, ns="", fail=True):
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return tool("bpftool", args, {"json":"-p"}, JSON=JSON, ns=ns, fail=fail)
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def bpftool(args, JSON=True, ns="", fail=True, include_stderr=False):
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return tool("bpftool", args, {"json":"-p"}, JSON=JSON, ns=ns,
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fail=fail, include_stderr=include_stderr)
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def bpftool_prog_list(expected=None, ns=""):
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_, progs = bpftool("prog show", JSON=True, ns=ns, fail=True)
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@ -201,6 +202,21 @@ def bpftool_map_list_wait(expected=0, n_retry=20):
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time.sleep(0.05)
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raise Exception("Time out waiting for map counts to stabilize want %d, have %d" % (expected, nmaps))
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def bpftool_prog_load(sample, file_name, maps=[], prog_type="xdp", dev=None,
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fail=True, include_stderr=False):
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args = "prog load %s %s" % (os.path.join(bpf_test_dir, sample), file_name)
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if prog_type is not None:
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args += " type " + prog_type
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if dev is not None:
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args += " dev " + dev
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if len(maps):
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args += " map " + " map ".join(maps)
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res = bpftool(args, fail=fail, include_stderr=include_stderr)
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if res[0] == 0:
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files.append(file_name)
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return res
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def ip(args, force=False, JSON=True, ns="", fail=True, include_stderr=False):
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if force:
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args = "-force " + args
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@ -307,7 +323,9 @@ class NetdevSim:
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Class for netdevsim netdevice and its attributes.
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"""
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def __init__(self):
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def __init__(self, link=None):
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self.link = link
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self.dev = self._netdevsim_create()
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devs.append(self)
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@ -321,8 +339,9 @@ class NetdevSim:
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return self.dev[key]
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def _netdevsim_create(self):
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link = "" if self.link is None else "link " + self.link.dev['ifname']
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_, old = ip("link show")
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ip("link add sim%d type netdevsim")
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ip("link add sim%d {link} type netdevsim".format(link=link))
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_, new = ip("link show")
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for dev in new:
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@ -848,6 +867,25 @@ try:
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sim.set_mtu(1500)
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sim.wait_for_flush()
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start_test("Test non-offload XDP attaching to HW...")
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bpftool_prog_load("sample_ret0.o", "/sys/fs/bpf/nooffload")
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nooffload = bpf_pinned("/sys/fs/bpf/nooffload")
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ret, _, err = sim.set_xdp(nooffload, "offload",
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fail=False, include_stderr=True)
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fail(ret == 0, "attached non-offloaded XDP program to HW")
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check_extack_nsim(err, "xdpoffload of non-bound program.", args)
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rm("/sys/fs/bpf/nooffload")
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start_test("Test offload XDP attaching to drv...")
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bpftool_prog_load("sample_ret0.o", "/sys/fs/bpf/offload",
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dev=sim['ifname'])
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offload = bpf_pinned("/sys/fs/bpf/offload")
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ret, _, err = sim.set_xdp(offload, "drv", fail=False, include_stderr=True)
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fail(ret == 0, "attached offloaded XDP program to drv")
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check_extack(err, "using device-bound program without HW_MODE flag is not supported.", args)
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rm("/sys/fs/bpf/offload")
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sim.wait_for_flush()
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start_test("Test XDP offload...")
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_, _, err = sim.set_xdp(obj, "offload", verbose=True, include_stderr=True)
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ipl = sim.ip_link_show(xdp=True)
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@ -1141,6 +1179,106 @@ try:
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fail(ret == 0,
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"netdevsim didn't refuse to create a map with offload disabled")
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sim.remove()
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start_test("Test multi-dev ASIC program reuse...")
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simA = NetdevSim()
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simB1 = NetdevSim()
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simB2 = NetdevSim(link=simB1)
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simB3 = NetdevSim(link=simB1)
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sims = (simA, simB1, simB2, simB3)
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simB = (simB1, simB2, simB3)
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bpftool_prog_load("sample_map_ret0.o", "/sys/fs/bpf/nsimA",
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dev=simA['ifname'])
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progA = bpf_pinned("/sys/fs/bpf/nsimA")
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bpftool_prog_load("sample_map_ret0.o", "/sys/fs/bpf/nsimB",
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dev=simB1['ifname'])
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progB = bpf_pinned("/sys/fs/bpf/nsimB")
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simA.set_xdp(progA, "offload", JSON=False)
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for d in simB:
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d.set_xdp(progB, "offload", JSON=False)
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start_test("Test multi-dev ASIC cross-dev replace...")
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ret, _ = simA.set_xdp(progB, "offload", force=True, JSON=False, fail=False)
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fail(ret == 0, "cross-ASIC program allowed")
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for d in simB:
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ret, _ = d.set_xdp(progA, "offload", force=True, JSON=False, fail=False)
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fail(ret == 0, "cross-ASIC program allowed")
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start_test("Test multi-dev ASIC cross-dev install...")
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for d in sims:
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d.unset_xdp("offload")
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ret, _, err = simA.set_xdp(progB, "offload", force=True, JSON=False,
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fail=False, include_stderr=True)
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fail(ret == 0, "cross-ASIC program allowed")
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check_extack_nsim(err, "program bound to different dev.", args)
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for d in simB:
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ret, _, err = d.set_xdp(progA, "offload", force=True, JSON=False,
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fail=False, include_stderr=True)
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fail(ret == 0, "cross-ASIC program allowed")
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check_extack_nsim(err, "program bound to different dev.", args)
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start_test("Test multi-dev ASIC cross-dev map reuse...")
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mapA = bpftool("prog show %s" % (progA))[1]["map_ids"][0]
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mapB = bpftool("prog show %s" % (progB))[1]["map_ids"][0]
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ret, _ = bpftool_prog_load("sample_map_ret0.o", "/sys/fs/bpf/nsimB_",
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dev=simB3['ifname'],
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maps=["idx 0 id %d" % (mapB)],
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fail=False)
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fail(ret != 0, "couldn't reuse a map on the same ASIC")
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rm("/sys/fs/bpf/nsimB_")
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ret, _, err = bpftool_prog_load("sample_map_ret0.o", "/sys/fs/bpf/nsimA_",
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dev=simA['ifname'],
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maps=["idx 0 id %d" % (mapB)],
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fail=False, include_stderr=True)
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fail(ret == 0, "could reuse a map on a different ASIC")
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fail(err.count("offload device mismatch between prog and map") == 0,
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"error message missing for cross-ASIC map")
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ret, _, err = bpftool_prog_load("sample_map_ret0.o", "/sys/fs/bpf/nsimB_",
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dev=simB1['ifname'],
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maps=["idx 0 id %d" % (mapA)],
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fail=False, include_stderr=True)
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fail(ret == 0, "could reuse a map on a different ASIC")
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fail(err.count("offload device mismatch between prog and map") == 0,
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"error message missing for cross-ASIC map")
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start_test("Test multi-dev ASIC cross-dev destruction...")
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bpftool_prog_list_wait(expected=2)
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simA.remove()
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bpftool_prog_list_wait(expected=1)
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ifnameB = bpftool("prog show %s" % (progB))[1]["dev"]["ifname"]
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fail(ifnameB != simB1['ifname'], "program not bound to originial device")
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simB1.remove()
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bpftool_prog_list_wait(expected=1)
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start_test("Test multi-dev ASIC cross-dev destruction - move...")
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ifnameB = bpftool("prog show %s" % (progB))[1]["dev"]["ifname"]
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fail(ifnameB not in (simB2['ifname'], simB3['ifname']),
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"program not bound to remaining devices")
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simB2.remove()
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ifnameB = bpftool("prog show %s" % (progB))[1]["dev"]["ifname"]
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fail(ifnameB != simB3['ifname'], "program not bound to remaining device")
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simB3.remove()
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bpftool_prog_list_wait(expected=0)
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start_test("Test multi-dev ASIC cross-dev destruction - orphaned...")
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ret, out = bpftool("prog show %s" % (progB), fail=False)
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fail(ret == 0, "got information about orphaned program")
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fail("error" not in out, "no error reported for get info on orphaned")
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fail(out["error"] != "can't get prog info: No such device",
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"wrong error for get info on orphaned")
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print("%s: OK" % (os.path.basename(__file__)))
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finally:
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