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Message-ID: <20251120033016.3809474-5-dw@davidwei.uk>
Date: Wed, 19 Nov 2025 19:30:13 -0800
From: David Wei <dw@...idwei.uk>
To: netdev@...r.kernel.org
Cc: Andrew Lunn <andrew+netdev@...n.ch>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Daniel Borkmann <daniel@...earbox.net>
Subject: [PATCH net-next v1 4/7] selftests/net: add rand_ifname() helper
For upcoming netkit container datapath selftests I want to generate
randomised ifnames. Add a helper rand_ifname() to do this.
Signed-off-by: David Wei <dw@...idwei.uk>
---
tools/testing/selftests/drivers/net/hw/lib/py/__init__.py | 5 +++--
tools/testing/selftests/drivers/net/lib/py/__init__.py | 5 +++--
tools/testing/selftests/net/lib/py/__init__.py | 5 +++--
tools/testing/selftests/net/lib/py/utils.py | 7 +++++++
4 files changed, 16 insertions(+), 6 deletions(-)
diff --git a/tools/testing/selftests/drivers/net/hw/lib/py/__init__.py b/tools/testing/selftests/drivers/net/hw/lib/py/__init__.py
index 09f120be9075..f2f6d3eccc86 100644
--- a/tools/testing/selftests/drivers/net/hw/lib/py/__init__.py
+++ b/tools/testing/selftests/drivers/net/hw/lib/py/__init__.py
@@ -22,7 +22,8 @@ try:
NlError, RtnlFamily, DevlinkFamily, PSPFamily
from net.lib.py import CmdExitFailure
from net.lib.py import bkg, cmd, bpftool, bpftrace, defer, ethtool, \
- fd_read_timeout, ip, rand_port, wait_port_listen, wait_file
+ fd_read_timeout, ip, rand_port, wait_port_listen, wait_file, \
+ rand_ifname
from net.lib.py import KsftSkipEx, KsftFailEx, KsftXfailEx
from net.lib.py import ksft_disruptive, ksft_exit, ksft_pr, ksft_run, \
ksft_setup
@@ -37,7 +38,7 @@ try:
"CmdExitFailure",
"bkg", "cmd", "bpftool", "bpftrace", "defer", "ethtool",
"fd_read_timeout", "ip", "rand_port",
- "wait_port_listen", "wait_file",
+ "wait_port_listen", "wait_file", "rand_ifname",
"KsftSkipEx", "KsftFailEx", "KsftXfailEx",
"ksft_disruptive", "ksft_exit", "ksft_pr", "ksft_run",
"ksft_setup",
diff --git a/tools/testing/selftests/drivers/net/lib/py/__init__.py b/tools/testing/selftests/drivers/net/lib/py/__init__.py
index dde4e80811c7..8fb75725f558 100644
--- a/tools/testing/selftests/drivers/net/lib/py/__init__.py
+++ b/tools/testing/selftests/drivers/net/lib/py/__init__.py
@@ -22,7 +22,8 @@ try:
NlError, RtnlFamily, DevlinkFamily, PSPFamily
from net.lib.py import CmdExitFailure
from net.lib.py import bkg, cmd, bpftool, bpftrace, defer, ethtool, \
- fd_read_timeout, ip, rand_port, wait_port_listen, wait_file
+ fd_read_timeout, ip, rand_port, wait_port_listen, wait_file, \
+ rand_ifname
from net.lib.py import KsftSkipEx, KsftFailEx, KsftXfailEx
from net.lib.py import ksft_disruptive, ksft_exit, ksft_pr, ksft_run, \
ksft_setup
@@ -35,7 +36,7 @@ try:
"CmdExitFailure",
"bkg", "cmd", "bpftool", "bpftrace", "defer", "ethtool",
"fd_read_timeout", "ip", "rand_port",
- "wait_port_listen", "wait_file",
+ "wait_port_listen", "wait_file", "rand_ifname",
"KsftSkipEx", "KsftFailEx", "KsftXfailEx",
"ksft_disruptive", "ksft_exit", "ksft_pr", "ksft_run",
"ksft_setup",
diff --git a/tools/testing/selftests/net/lib/py/__init__.py b/tools/testing/selftests/net/lib/py/__init__.py
index 97b7cf2b20eb..f16cbc025bf2 100644
--- a/tools/testing/selftests/net/lib/py/__init__.py
+++ b/tools/testing/selftests/net/lib/py/__init__.py
@@ -12,7 +12,8 @@ from .ksft import KsftFailEx, KsftSkipEx, KsftXfailEx, ksft_pr, ksft_eq, \
from .netns import NetNS, NetNSEnter
from .nsim import NetdevSim, NetdevSimDev
from .utils import CmdExitFailure, fd_read_timeout, cmd, bkg, defer, \
- bpftool, ip, ethtool, bpftrace, rand_port, wait_port_listen, wait_file
+ bpftool, ip, ethtool, bpftrace, rand_port, wait_port_listen, wait_file, \
+ rand_ifname
from .ynl import NlError, YnlFamily, EthtoolFamily, NetdevFamily, RtnlFamily, RtnlAddrFamily
from .ynl import NetshaperFamily, DevlinkFamily, PSPFamily
@@ -25,7 +26,7 @@ __all__ = ["KSRC",
"NetNS", "NetNSEnter",
"CmdExitFailure", "fd_read_timeout", "cmd", "bkg", "defer",
"bpftool", "ip", "ethtool", "bpftrace", "rand_port",
- "wait_port_listen", "wait_file",
+ "wait_port_listen", "wait_file", "rand_ifname",
"NetdevSim", "NetdevSimDev",
"NetshaperFamily", "DevlinkFamily", "PSPFamily", "NlError",
"YnlFamily", "EthtoolFamily", "NetdevFamily", "RtnlFamily",
diff --git a/tools/testing/selftests/net/lib/py/utils.py b/tools/testing/selftests/net/lib/py/utils.py
index cb40ecef9456..56546d796f6c 100644
--- a/tools/testing/selftests/net/lib/py/utils.py
+++ b/tools/testing/selftests/net/lib/py/utils.py
@@ -2,9 +2,11 @@
import json as _json
import os
+import random
import re
import select
import socket
+import string
import subprocess
import time
@@ -238,6 +240,11 @@ def rand_port(stype=socket.SOCK_STREAM):
return s.getsockname()[1]
+def rand_ifname():
+ dev = ''.join(random.choice(string.ascii_lowercase) for _ in range(6))
+ return dev + ''.join(random.choice(string.digits) for _ in range(2))
+
+
def wait_port_listen(port, proto="tcp", ns=None, host=None, sleep=0.005, deadline=5):
end = time.monotonic() + deadline
--
2.47.3
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