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Message-ID: <20240409031549.3531084-5-kuba@kernel.org>
Date: Mon, 8 Apr 2024 20:15:49 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
edumazet@...gle.com,
pabeni@...hat.com,
bpf@...r.kernel.org,
andrii@...nel.org,
mykolal@...com,
eddyz87@...il.com,
shuah@...nel.org,
linux-kselftest@...r.kernel.org,
Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next 4/4] selftests: net: reuse common code in bpf_offload
net/lib/py/nsim.py already contains the most useful parts
of the netdevsim wrapper classes. Reuse them.
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
tools/testing/selftests/net/bpf_offload.py | 120 +++++----------------
tools/testing/selftests/net/lib/py/nsim.py | 9 +-
2 files changed, 35 insertions(+), 94 deletions(-)
diff --git a/tools/testing/selftests/net/bpf_offload.py b/tools/testing/selftests/net/bpf_offload.py
index 76b53ac2c8c6..3efe44f6e92a 100755
--- a/tools/testing/selftests/net/bpf_offload.py
+++ b/tools/testing/selftests/net/bpf_offload.py
@@ -29,6 +29,9 @@ import subprocess
import time
import traceback
+from lib.py import NetdevSim, NetdevSimDev
+
+
logfile = None
log_level = 1
skip_extack = False
@@ -145,8 +148,10 @@ netns = [] # net namespaces to be removed
if JSON:
params += "%s " % (flags["json"])
- if ns != "":
+ if ns:
ns = "ip netns exec %s " % (ns)
+ elif ns is None:
+ ns = ""
if include_stderr:
ret, stdout, stderr = cmd(ns + name + " " + params + args,
@@ -334,72 +339,16 @@ def bpftool_prog_load(sample, file_name, maps=[], prog_type="xdp", dev=None,
return dfs
-class NetdevSimDev:
+class BpfNetdevSimDev(NetdevSimDev):
"""
Class for netdevsim bus device and its attributes.
"""
- @staticmethod
- def ctrl_write(path, val):
- fullpath = os.path.join("/sys/bus/netdevsim/", path)
- try:
- with open(fullpath, "w") as f:
- f.write(val)
- except OSError as e:
- log("WRITE %s: %r" % (fullpath, val), -e.errno)
- raise e
- log("WRITE %s: %r" % (fullpath, val), 0)
-
- def __init__(self, port_count=1):
- addr = 0
- while True:
- try:
- self.ctrl_write("new_device", "%u %u" % (addr, port_count))
- except OSError as e:
- if e.errno == errno.ENOSPC:
- addr += 1
- continue
- raise e
- break
- self.addr = addr
-
- # As probe of netdevsim device might happen from a workqueue,
- # so wait here until all netdevs appear.
- self.wait_for_netdevs(port_count)
-
- ret, out = cmd("udevadm settle", fail=False)
- if ret:
- raise Exception("udevadm settle failed")
- ifnames = self.get_ifnames()
-
+ def __init__(self, port_count=1, ns=None):
+ super().__init__(port_count, ns=ns)
devs.append(self)
- self.dfs_dir = "/sys/kernel/debug/netdevsim/netdevsim%u/" % addr
- self.nsims = []
- for port_index in range(port_count):
- self.nsims.append(NetdevSim(self, port_index, ifnames[port_index]))
-
- def get_ifnames(self):
- ifnames = []
- listdir = os.listdir("/sys/bus/netdevsim/devices/netdevsim%u/net/" % self.addr)
- for ifname in listdir:
- ifnames.append(ifname)
- ifnames.sort()
- return ifnames
-
- def wait_for_netdevs(self, port_count):
- timeout = 5
- timeout_start = time.time()
-
- while True:
- try:
- ifnames = self.get_ifnames()
- except FileNotFoundError as e:
- ifnames = []
- if len(ifnames) == port_count:
- break
- if time.time() < timeout_start + timeout:
- continue
- raise Exception("netdevices did not appear within timeout")
+ def _make_port(self, port_index, ifname):
+ return BpfNetdevSim(self, port_index, ifname, self.ns)
def dfs_num_bound_progs(self):
path = os.path.join(self.dfs_dir, "bpf_bound_progs")
@@ -415,33 +364,20 @@ def bpftool_prog_load(sample, file_name, maps=[], prog_type="xdp", dev=None,
return progs
def remove(self):
- self.ctrl_write("del_device", "%u" % (self.addr, ))
+ super().remove()
devs.remove(self)
- def remove_nsim(self, nsim):
- self.nsims.remove(nsim)
- self.ctrl_write("devices/netdevsim%u/del_port" % (self.addr, ),
- "%u" % (nsim.port_index, ))
-class NetdevSim:
+class BpfNetdevSim(NetdevSim):
"""
Class for netdevsim netdevice and its attributes.
"""
- def __init__(self, nsimdev, port_index, ifname):
- # In case udev renamed the netdev to according to new schema,
- # check if the name matches the port_index.
- nsimnamere = re.compile("eni\d+np(\d+)")
- match = nsimnamere.match(ifname)
- if match and int(match.groups()[0]) != port_index + 1:
- raise Exception("netdevice name mismatches the expected one")
+ def __init__(self, nsimdev, port_index, ifname, ns=None):
+ super().__init__(nsimdev, port_index, ifname, ns=ns)
- self.nsimdev = nsimdev
- self.port_index = port_index
- self.ns = ""
self.dfs_dir = "%s/ports/%u/" % (nsimdev.dfs_dir, port_index)
self.dfs_refresh()
- _, [self.dev] = ip("link show dev %s" % ifname)
def __getitem__(self, key):
return self.dev[key]
@@ -468,7 +404,7 @@ def bpftool_prog_load(sample, file_name, maps=[], prog_type="xdp", dev=None,
raise Exception("Time out waiting for program counts to stabilize want %d/%d, have %d bound, %d loaded" % (bound, total, nbound, nprogs))
def set_ns(self, ns):
- name = "1" if ns == "" else ns
+ name = ns if ns else "1"
ip("link set dev %s netns %s" % (self.dev["ifname"], name), ns=self.ns)
self.ns = ns
@@ -744,7 +680,7 @@ def bpftool_prog_load(sample, file_name, maps=[], prog_type="xdp", dev=None,
start_test("Test multi-attachment XDP - device remove...")
simdev.remove()
- simdev = NetdevSimDev()
+ simdev = BpfNetdevSimDev()
sim, = simdev.nsims
sim.set_ethtool_tc_offloads(True)
return [simdev, sim]
@@ -809,13 +745,13 @@ netns = []
bytecode = bpf_bytecode("1,6 0 0 4294967295,")
start_test("Test destruction of generic XDP...")
- simdev = NetdevSimDev()
+ simdev = BpfNetdevSimDev()
sim, = simdev.nsims
sim.set_xdp(obj, "generic")
simdev.remove()
bpftool_prog_list_wait(expected=0)
- simdev = NetdevSimDev()
+ simdev = BpfNetdevSimDev()
sim, = simdev.nsims
sim.tc_add_ingress()
@@ -967,7 +903,7 @@ netns = []
simdev.remove()
bpftool_prog_list_wait(expected=0)
- simdev = NetdevSimDev()
+ simdev = BpfNetdevSimDev()
sim, = simdev.nsims
sim.set_ethtool_tc_offloads(True)
@@ -976,7 +912,7 @@ netns = []
simdev.remove()
bpftool_prog_list_wait(expected=0)
- simdev = NetdevSimDev()
+ simdev = BpfNetdevSimDev()
sim, = simdev.nsims
sim.set_ethtool_tc_offloads(True)
@@ -1080,7 +1016,7 @@ netns = []
bpftool_prog_list_wait(expected=0)
start_test("Test attempt to use a program for a wrong device...")
- simdev2 = NetdevSimDev()
+ simdev2 = BpfNetdevSimDev()
sim2, = simdev2.nsims
sim2.set_xdp(obj, "offload")
pin_file, pinned = pin_prog("/sys/fs/bpf/tmp")
@@ -1169,7 +1105,7 @@ netns = []
clean_up()
bpftool_prog_list_wait(expected=0)
- simdev = NetdevSimDev()
+ simdev = BpfNetdevSimDev()
sim, = simdev.nsims
map_obj = bpf_obj("sample_map_ret0.bpf.o")
start_test("Test loading program with maps...")
@@ -1201,7 +1137,7 @@ netns = []
clean_up()
bpftool_prog_list_wait(expected=0)
- simdev = NetdevSimDev()
+ simdev = BpfNetdevSimDev()
sim, = simdev.nsims
start_test("Test map update (no flags)...")
@@ -1285,14 +1221,14 @@ netns = []
bpftool_map_list_wait(expected=0)
simdev.remove()
- simdev = NetdevSimDev()
+ simdev = BpfNetdevSimDev()
sim, = simdev.nsims
sim.set_xdp(map_obj, "offload", JSON=False) # map fixup msg breaks JSON
simdev.remove()
bpftool_map_list_wait(expected=0)
start_test("Test map creation fail path...")
- simdev = NetdevSimDev()
+ simdev = BpfNetdevSimDev()
sim, = simdev.nsims
sim.dfs["bpf_map_accept"] = "N"
ret, _ = sim.set_xdp(map_obj, "offload", JSON=False, fail=False)
@@ -1302,9 +1238,9 @@ netns = []
simdev.remove()
start_test("Test multi-dev ASIC program reuse...")
- simdevA = NetdevSimDev()
+ simdevA = BpfNetdevSimDev()
simA, = simdevA.nsims
- simdevB = NetdevSimDev(3)
+ simdevB = BpfNetdevSimDev(3)
simB1, simB2, simB3 = simdevB.nsims
sims = (simA, simB1, simB2, simB3)
simB = (simB1, simB2, simB3)
diff --git a/tools/testing/selftests/net/lib/py/nsim.py b/tools/testing/selftests/net/lib/py/nsim.py
index b2d696e12805..97457aca7e08 100644
--- a/tools/testing/selftests/net/lib/py/nsim.py
+++ b/tools/testing/selftests/net/lib/py/nsim.py
@@ -21,8 +21,11 @@ from .utils import cmd, ip
if match and int(match.groups()[0]) != port_index + 1:
raise Exception("netdevice name mismatches the expected one")
+ self.ifname = ifname
self.nsimdev = nsimdev
self.port_index = port_index
+ self.ns = ns
+ self.dfs_dir = "%s/ports/%u/" % (nsimdev.dfs_dir, port_index)
ret = ip("-j link show dev %s" % ifname, ns=ns)
self.dev = json.loads(ret.stdout)[0]
@@ -79,8 +82,10 @@ from .utils import cmd, ip
self.nsims = []
for port_index in range(port_count):
- self.nsims.append(NetdevSim(self, port_index, ifnames[port_index],
- ns=ns))
+ self.nsims.append(self._make_port(port_index, ifnames[port_index]))
+
+ def _make_port(self, port_index, ifname):
+ return NetdevSim(self, port_index, ifname, self.ns)
def get_ifnames(self):
ifnames = []
--
2.44.0
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