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authorJiri Pirko <jiri@mellanox.com>2019-04-25 15:59:55 +0200
committerDavid S. Miller <davem@davemloft.net>2019-04-26 01:52:03 -0400
commite05b2d141fef22cfac1928cf0eb6890e5dae4216 (patch)
tree055d8c4330e6e9002a2bf4e9829febe8df84d59f /tools/testing/selftests
parentnetdevsim: extend device attrs to support port addition and deletion (diff)
downloadlinux-dev-e05b2d141fef22cfac1928cf0eb6890e5dae4216.tar.xz
linux-dev-e05b2d141fef22cfac1928cf0eb6890e5dae4216.zip
netdevsim: move netdev creation/destruction to dev probe
Remove the existing way to create netdevsim over rtnetlink and move the netdev creation/destruction to dev probe, so for every probed port, a netdevsim-netdev instance is created. Adjust selftests to work with new interface. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/testing/selftests')
-rwxr-xr-xtools/testing/selftests/bpf/test_offload.py223
-rwxr-xr-xtools/testing/selftests/net/rtnetlink.sh9
2 files changed, 153 insertions, 79 deletions
diff --git a/tools/testing/selftests/bpf/test_offload.py b/tools/testing/selftests/bpf/test_offload.py
index 5f2e4f9e70e4..425f9ed27c3b 100755
--- a/tools/testing/selftests/bpf/test_offload.py
+++ b/tools/testing/selftests/bpf/test_offload.py
@@ -1,6 +1,7 @@
#!/usr/bin/python3
# Copyright (C) 2017 Netronome Systems, Inc.
+# Copyright (c) 2019 Mellanox Technologies. All rights reserved
#
# This software is licensed under the GNU General License Version 2,
# June 1991 as shown in the file COPYING in the top-level directory of this
@@ -15,10 +16,12 @@
from datetime import datetime
import argparse
+import errno
import json
import os
import pprint
import random
+import re
import string
import struct
import subprocess
@@ -323,42 +326,112 @@ class DebugfsDir:
return dfs
-class NetdevSim:
+class NetdevSimDev:
"""
- Class for netdevsim netdevice and its attributes.
+ Class for netdevsim bus device and its attributes.
"""
- def __init__(self, link=None):
- self.link = link
+ def __init__(self, port_count=1):
+ addr = 0
+ while True:
+ try:
+ with open("/sys/bus/netdevsim/new_device", "w") as f:
+ f.write("%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()
- self.dev = self._netdevsim_create()
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")
- self.ns = ""
+ def dfs_num_bound_progs(self):
+ path = os.path.join(self.dfs_dir, "bpf_bound_progs")
+ _, progs = cmd('ls %s' % (path))
+ return len(progs.split())
- self.dfs_dir = '/sys/kernel/debug/netdevsim/netdevsim0/ports/0/'
- self.dev_dir = self.dfs_dir + '/dev/'
- self.dfs_refresh()
+ def dfs_get_bound_progs(self, expected):
+ progs = DebugfsDir(os.path.join(self.dfs_dir, "bpf_bound_progs"))
+ if expected is not None:
+ if len(progs) != expected:
+ fail(True, "%d BPF programs bound, expected %d" %
+ (len(progs), expected))
+ return progs
- def __getitem__(self, key):
- return self.dev[key]
+ def remove(self):
+ with open("/sys/bus/netdevsim/del_device", "w") as f:
+ f.write("%u" % self.addr)
+ devs.remove(self)
+
+ def remove_nsim(self, nsim):
+ self.nsims.remove(nsim)
+ with open("/sys/bus/netdevsim/devices/netdevsim%u/del_port" % self.addr ,"w") as f:
+ f.write("%u" % nsim.port_index)
+
+class NetdevSim:
+ """
+ Class for netdevsim netdevice and its attributes.
+ """
- def _netdevsim_create(self):
- link = "" if self.link is None else "link " + self.link.dev['ifname']
- _, old = ip("link show")
- ip("link add sim%d {link} type netdevsim".format(link=link))
- _, new = ip("link show")
+ 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")
- for dev in new:
- f = filter(lambda x: x["ifname"] == dev["ifname"], old)
- if len(list(f)) == 0:
- return dev
+ 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)
- raise Exception("failed to create netdevsim device")
+ def __getitem__(self, key):
+ return self.dev[key]
def remove(self):
- devs.remove(self)
- ip("link del dev %s" % (self.dev["ifname"]), ns=self.ns)
+ self.nsimdev.remove_nsim(self)
def dfs_refresh(self):
self.dfs = DebugfsDir(self.dfs_dir)
@@ -369,22 +442,9 @@ class NetdevSim:
_, data = cmd('cat %s' % (path))
return data.strip()
- def dfs_num_bound_progs(self):
- path = os.path.join(self.dev_dir, "bpf_bound_progs")
- _, progs = cmd('ls %s' % (path))
- return len(progs.split())
-
- def dfs_get_bound_progs(self, expected):
- progs = DebugfsDir(os.path.join(self.dev_dir, "bpf_bound_progs"))
- if expected is not None:
- if len(progs) != expected:
- fail(True, "%d BPF programs bound, expected %d" %
- (len(progs), expected))
- return progs
-
def wait_for_flush(self, bound=0, total=0, n_retry=20):
for i in range(n_retry):
- nbound = self.dfs_num_bound_progs()
+ nbound = self.nsimdev.dfs_num_bound_progs()
nprogs = len(bpftool_prog_list())
if nbound == bound and nprogs == total:
return
@@ -614,7 +674,7 @@ def test_spurios_extack(sim, obj, skip_hw, needle):
include_stderr=True)
check_no_extack(res, needle)
-def test_multi_prog(sim, obj, modename, modeid):
+def test_multi_prog(simdev, sim, obj, modename, modeid):
start_test("Test multi-attachment XDP - %s + offload..." %
(modename or "default", ))
sim.set_xdp(obj, "offload")
@@ -670,11 +730,12 @@ def test_multi_prog(sim, obj, modename, modeid):
check_multi_basic(two_xdps)
start_test("Test multi-attachment XDP - device remove...")
- sim.remove()
+ simdev.remove()
- sim = NetdevSim()
+ simdev = NetdevSimDev()
+ sim, = simdev.nsims
sim.set_ethtool_tc_offloads(True)
- return sim
+ return [simdev, sim]
# Parse command line
parser = argparse.ArgumentParser()
@@ -731,12 +792,14 @@ try:
bytecode = bpf_bytecode("1,6 0 0 4294967295,")
start_test("Test destruction of generic XDP...")
- sim = NetdevSim()
+ simdev = NetdevSimDev()
+ sim, = simdev.nsims
sim.set_xdp(obj, "generic")
- sim.remove()
+ simdev.remove()
bpftool_prog_list_wait(expected=0)
- sim = NetdevSim()
+ simdev = NetdevSimDev()
+ sim, = simdev.nsims
sim.tc_add_ingress()
start_test("Test TC non-offloaded...")
@@ -746,7 +809,7 @@ try:
start_test("Test TC non-offloaded isn't getting bound...")
ret, _ = sim.cls_bpf_add_filter(obj, fail=False)
fail(ret != 0, "Software TC filter did not load")
- sim.dfs_get_bound_progs(expected=0)
+ simdev.dfs_get_bound_progs(expected=0)
sim.tc_flush_filters()
@@ -763,7 +826,7 @@ try:
start_test("Test TC offload by default...")
ret, _ = sim.cls_bpf_add_filter(obj, fail=False)
fail(ret != 0, "Software TC filter did not load")
- sim.dfs_get_bound_progs(expected=0)
+ simdev.dfs_get_bound_progs(expected=0)
ingress = sim.tc_show_ingress(expected=1)
fltr = ingress[0]
fail(not fltr["in_hw"], "Filter not offloaded by default")
@@ -773,7 +836,7 @@ try:
start_test("Test TC cBPF bytcode tries offload by default...")
ret, _ = sim.cls_bpf_add_filter(bytecode, fail=False)
fail(ret != 0, "Software TC filter did not load")
- sim.dfs_get_bound_progs(expected=0)
+ simdev.dfs_get_bound_progs(expected=0)
ingress = sim.tc_show_ingress(expected=1)
fltr = ingress[0]
fail(not fltr["in_hw"], "Bytecode not offloaded by default")
@@ -841,7 +904,7 @@ try:
check_verifier_log(err, "[netdevsim] Hello from netdevsim!")
start_test("Test TC offload basics...")
- dfs = sim.dfs_get_bound_progs(expected=1)
+ dfs = simdev.dfs_get_bound_progs(expected=1)
progs = bpftool_prog_list(expected=1)
ingress = sim.tc_show_ingress(expected=1)
@@ -876,18 +939,20 @@ try:
start_test("Test destroying device gets rid of TC filters...")
sim.cls_bpf_add_filter(obj, skip_sw=True)
- sim.remove()
+ simdev.remove()
bpftool_prog_list_wait(expected=0)
- sim = NetdevSim()
+ simdev = NetdevSimDev()
+ sim, = simdev.nsims
sim.set_ethtool_tc_offloads(True)
start_test("Test destroying device gets rid of XDP...")
sim.set_xdp(obj, "offload")
- sim.remove()
+ simdev.remove()
bpftool_prog_list_wait(expected=0)
- sim = NetdevSim()
+ simdev = NetdevSimDev()
+ sim, = simdev.nsims
sim.set_ethtool_tc_offloads(True)
start_test("Test XDP prog reporting...")
@@ -973,7 +1038,7 @@ try:
check_verifier_log(err, "[netdevsim] Hello from netdevsim!")
start_test("Test XDP offload is device bound...")
- dfs = sim.dfs_get_bound_progs(expected=1)
+ dfs = simdev.dfs_get_bound_progs(expected=1)
dprog = dfs[0]
fail(prog["id"] != link_xdp["id"], "Program IDs don't match")
@@ -992,7 +1057,8 @@ try:
bpftool_prog_list_wait(expected=0)
start_test("Test attempt to use a program for a wrong device...")
- sim2 = NetdevSim()
+ simdev2 = NetdevSimDev()
+ sim2, = simdev2.nsims
sim2.set_xdp(obj, "offload")
pin_file, pinned = pin_prog("/sys/fs/bpf/tmp")
@@ -1000,7 +1066,7 @@ try:
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()
+ simdev2.remove()
ret, _, err = sim.set_xdp(pinned, "offload",
fail=False, include_stderr=True)
fail(ret == 0, "Pinned program loaded for a removed device accepted")
@@ -1008,9 +1074,9 @@ try:
rm(pin_file)
bpftool_prog_list_wait(expected=0)
- sim = test_multi_prog(sim, obj, "", 1)
- sim = test_multi_prog(sim, obj, "drv", 1)
- sim = test_multi_prog(sim, obj, "generic", 2)
+ simdev, sim = test_multi_prog(simdev, sim, obj, "", 1)
+ simdev, sim = test_multi_prog(simdev, sim, obj, "drv", 1)
+ simdev, sim = test_multi_prog(simdev, sim, obj, "generic", 2)
start_test("Test mixing of TC and XDP...")
sim.tc_add_ingress()
@@ -1063,9 +1129,9 @@ try:
(sim['ifname'], obj)
tc_proc = cmd(cmd_line, background=True, fail=False)
# Wait for the verifier to start
- while sim.dfs_num_bound_progs() <= 2:
+ while simdev.dfs_num_bound_progs() <= 2:
pass
- sim.remove()
+ simdev.remove()
end = time.time()
ret, _ = cmd_result(tc_proc, fail=False)
time_diff = end - start
@@ -1080,7 +1146,8 @@ try:
clean_up()
bpftool_prog_list_wait(expected=0)
- sim = NetdevSim()
+ simdev = NetdevSimDev()
+ sim, = simdev.nsims
map_obj = bpf_obj("sample_map_ret0.o")
start_test("Test loading program with maps...")
sim.set_xdp(map_obj, "offload", JSON=False) # map fixup msg breaks JSON
@@ -1102,7 +1169,7 @@ try:
prog_file, _ = pin_prog("/sys/fs/bpf/tmp_prog")
map_file, _ = pin_map("/sys/fs/bpf/tmp_map", idx=1, expected=2)
- sim.remove()
+ simdev.remove()
start_test("Test bpftool bound info reporting (removed dev)...")
check_dev_info_removed(prog_file=prog_file, map_file=map_file)
@@ -1111,7 +1178,8 @@ try:
clean_up()
bpftool_prog_list_wait(expected=0)
- sim = NetdevSim()
+ simdev = NetdevSimDev()
+ sim, = simdev.nsims
start_test("Test map update (no flags)...")
sim.set_xdp(map_obj, "offload", JSON=False) # map fixup msg breaks JSON
@@ -1192,27 +1260,29 @@ try:
start_test("Test map remove...")
sim.unset_xdp("offload")
bpftool_map_list_wait(expected=0)
- sim.remove()
+ simdev.remove()
- sim = NetdevSim()
+ simdev = NetdevSimDev()
+ sim, = simdev.nsims
sim.set_xdp(map_obj, "offload", JSON=False) # map fixup msg breaks JSON
- sim.remove()
+ simdev.remove()
bpftool_map_list_wait(expected=0)
start_test("Test map creation fail path...")
- sim = NetdevSim()
+ simdev = NetdevSimDev()
+ sim, = simdev.nsims
sim.dfs["bpf_map_accept"] = "N"
ret, _ = sim.set_xdp(map_obj, "offload", JSON=False, fail=False)
fail(ret == 0,
"netdevsim didn't refuse to create a map with offload disabled")
- sim.remove()
+ simdev.remove()
start_test("Test multi-dev ASIC program reuse...")
- simA = NetdevSim()
- simB1 = NetdevSim()
- simB2 = NetdevSim(link=simB1)
- simB3 = NetdevSim(link=simB1)
+ simdevA = NetdevSimDev()
+ simA, = simdevA.nsims
+ simdevB = NetdevSimDev(3)
+ simB1, simB2, simB3 = simdevB.nsims
sims = (simA, simB1, simB2, simB3)
simB = (simB1, simB2, simB3)
@@ -1224,13 +1294,13 @@ try:
progB = bpf_pinned("/sys/fs/bpf/nsimB")
simA.set_xdp(progA, "offload", JSON=False)
- for d in simB:
+ for d in simdevB.nsims:
d.set_xdp(progB, "offload", JSON=False)
start_test("Test multi-dev ASIC cross-dev replace...")
ret, _ = simA.set_xdp(progB, "offload", force=True, JSON=False, fail=False)
fail(ret == 0, "cross-ASIC program allowed")
- for d in simB:
+ for d in simdevB.nsims:
ret, _ = d.set_xdp(progA, "offload", force=True, JSON=False, fail=False)
fail(ret == 0, "cross-ASIC program allowed")
@@ -1242,7 +1312,7 @@ try:
fail=False, include_stderr=True)
fail(ret == 0, "cross-ASIC program allowed")
check_extack_nsim(err, "program bound to different dev.", args)
- for d in simB:
+ for d in simdevB.nsims:
ret, _, err = d.set_xdp(progA, "offload", force=True, JSON=False,
fail=False, include_stderr=True)
fail(ret == 0, "cross-ASIC program allowed")
@@ -1279,7 +1349,7 @@ try:
start_test("Test multi-dev ASIC cross-dev destruction...")
bpftool_prog_list_wait(expected=2)
- simA.remove()
+ simdevA.remove()
bpftool_prog_list_wait(expected=1)
ifnameB = bpftool("prog show %s" % (progB))[1]["dev"]["ifname"]
@@ -1297,6 +1367,7 @@ try:
fail(ifnameB != simB3['ifname'], "program not bound to remaining device")
simB3.remove()
+ simdevB.remove()
bpftool_prog_list_wait(expected=0)
start_test("Test multi-dev ASIC cross-dev destruction - orphaned...")
diff --git a/tools/testing/selftests/net/rtnetlink.sh b/tools/testing/selftests/net/rtnetlink.sh
index 311f82bcbe8d..b25c9fe019d2 100755
--- a/tools/testing/selftests/net/rtnetlink.sh
+++ b/tools/testing/selftests/net/rtnetlink.sh
@@ -696,9 +696,9 @@ kci_test_ipsec_offload()
algo="aead rfc4106(gcm(aes)) 0x3132333435363738393031323334353664636261 128"
srcip=192.168.123.3
dstip=192.168.123.4
- dev=simx1
sysfsd=/sys/kernel/debug/netdevsim/netdevsim0/ports/0/
sysfsf=$sysfsd/ipsec
+ sysfsnet=/sys/bus/netdevsim/devices/netdevsim0/net/
# setup netdevsim since dummydev doesn't have offload support
modprobe netdevsim
@@ -708,7 +708,11 @@ kci_test_ipsec_offload()
return 1
fi
- ip link add $dev type netdevsim
+ echo "0" > /sys/bus/netdevsim/new_device
+ while [ ! -d $sysfsnet ] ; do :; done
+ udevadm settle
+ dev=`ls $sysfsnet`
+
ip addr add $srcip dev $dev
ip link set $dev up
if [ ! -d $sysfsd ] ; then
@@ -781,7 +785,6 @@ EOF
fi
# clean up any leftovers
- ip link del $dev
rmmod netdevsim
if [ $ret -ne 0 ]; then