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Message-ID: <20260121073517.3323332-3-kiran.kella@broadcom.com>
Date: Tue, 20 Jan 2026 23:35:17 -0800
From: Kiran Kella <kiran.kella@...adcom.com>
To: davem@...emloft.net,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
andrew+netdev@...n.ch,
horms@...nel.org
Cc: netdev@...r.kernel.org,
linux-kernel@...r.kernel.org,
jayakrishnan.udayavarma@...adcom.com,
ajit.khaparde@...adcom.com,
akhilesh.samineni@...adcom.com,
Kiran Kella <kiran.kella@...adcom.com>
Subject: [net-next 2/2] selftests: drv-net: psp: add test for VLAN sub-interface
Add test to validate that the psp device information is propagated
properly from the lower device to the upper devices so that
the PSP transmit validation passes.
Signed-off-by: Kiran Kella <kiran.kella@...adcom.com>
Reviewed-by: Akhilesh Samineni <akhilesh.samineni@...adcom.com>
---
tools/testing/selftests/drivers/net/psp.py | 117 ++++++++++++++++++++-
1 file changed, 115 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/drivers/net/psp.py b/tools/testing/selftests/drivers/net/psp.py
index 528a421ecf76..b0373d6b4998 100755
--- a/tools/testing/selftests/drivers/net/psp.py
+++ b/tools/testing/selftests/drivers/net/psp.py
@@ -17,7 +17,7 @@ from lib.py import ksft_not_none
from lib.py import KsftSkipEx
from lib.py import NetDrvEpEnv, PSPFamily, NlError
from lib.py import bkg, rand_port, wait_port_listen
-
+from lib.py import ip
def _get_outq(s):
one = b'\0' * 4
@@ -568,6 +568,119 @@ def removal_device_bi(cfg):
finally:
_close_conn(cfg, s)
+def vlan_basic_send(cfg):
+ """
+ Test PSP over VLAN-to-VLAN traffic
+
+ Network topology:
+ Local VLAN (nsim0.100) <---> Remote VLAN (nsim1.100)
+ | |
+ Local Physical (nsim0) <---> Remote Physical (nsim1)
+ [PSP configured here]
+ """
+ cfg.require_nsim()
+ _init_psp_dev(cfg)
+
+ # Store original interface names and addresses
+ orig_local_ifname = cfg.ifname
+ orig_local_ifindex = cfg.ifindex
+ orig_remote_ifname = cfg.remote_ifname
+ orig_local_addr_v4 = cfg.addr_v["4"]
+ orig_local_addr_v6 = cfg.addr_v["6"]
+ orig_remote_addr_v4 = cfg.remote_addr_v["4"]
+ orig_remote_addr_v6 = cfg.remote_addr_v["6"]
+
+ # VLAN configuration
+ vlan_id = 100
+ local_vlan_ifname = f"{orig_local_ifname}.{vlan_id}"
+ remote_vlan_ifname = f"{orig_remote_ifname}.{vlan_id}"
+
+ local_vlan_addr_v4 = "192.0.2.21"
+ remote_vlan_addr_v4 = "192.0.2.22"
+ local_vlan_addr_v6 = "2001:db8::21"
+ remote_vlan_addr_v6 = "2001:db8::22"
+
+ try:
+ # Create VLAN interface on LOCAL side
+ ip(f"link add link {orig_local_ifname} name {local_vlan_ifname} type vlan id {vlan_id}")
+ ip(f"addr add {local_vlan_addr_v4}/24 dev {local_vlan_ifname}")
+ ip(f"-6 addr add {local_vlan_addr_v6}/64 dev {local_vlan_ifname} nodad")
+ ip(f"link set {local_vlan_ifname} up")
+
+ # Create VLAN interface on REMOTE side
+ ip(f"link add link {orig_remote_ifname} name {remote_vlan_ifname} type vlan id {vlan_id}", host=cfg.remote)
+ ip(f"addr add {remote_vlan_addr_v4}/24 dev {remote_vlan_ifname}", host=cfg.remote)
+ ip(f"-6 addr add {remote_vlan_addr_v6}/64 dev {remote_vlan_ifname} nodad", host=cfg.remote)
+ ip(f"link set {remote_vlan_ifname} up", host=cfg.remote)
+
+ # Get VLAN interface indices
+ local_vlan_info = ip(f"-j link show {local_vlan_ifname}", json=True)[0]
+ local_vlan_ifindex = local_vlan_info['ifindex']
+
+ remote_vlan_info = ip(f"-j link show {remote_vlan_ifname}", json=True, host=cfg.remote)[0]
+ remote_vlan_ifindex = remote_vlan_info['ifindex']
+
+ # Temporarily switch cfg to use VLAN interfaces
+ # The PSP device is still on the physical interface, but
+ # the socket will be bound to the VLAN interface
+ cfg.ifname = local_vlan_ifname
+ cfg.ifindex = local_vlan_ifindex
+ cfg.remote_ifname = remote_vlan_ifname
+ cfg.addr_v["4"] = local_vlan_addr_v4
+ cfg.addr_v["6"] = local_vlan_addr_v6
+ cfg.remote_addr_v["4"] = remote_vlan_addr_v4
+ cfg.remote_addr_v["6"] = remote_vlan_addr_v6
+ cfg.addr = local_vlan_addr_v4
+ cfg.remote_addr = remote_vlan_addr_v4
+
+ s = _make_psp_conn(cfg, version=0)
+
+ try:
+ # Create PSP associations
+ # The socket's device is VLAN, but PSP device is on physical NIC
+ rx_assoc = cfg.pspnl.rx_assoc({
+ "version": 0,
+ "dev-id": cfg.psp_dev_id, # PSP device on physical interface
+ "sock-fd": s.fileno()
+ })
+ rx = rx_assoc['rx-key']
+ tx = _spi_xchg(s, rx)
+
+ cfg.pspnl.tx_assoc({
+ "dev-id": cfg.psp_dev_id,
+ "version": 0,
+ "tx-key": tx,
+ "sock-fd": s.fileno()
+ })
+
+ # Send data through VLAN interface (VLAN-to-VLAN traffic!)
+ data_len = _send_careful(cfg, s, 100)
+ _check_data_rx(cfg, data_len)
+
+ finally:
+ _close_psp_conn(cfg, s)
+
+ finally:
+ # Restore original interface configuration
+ cfg.ifname = orig_local_ifname
+ cfg.ifindex = orig_local_ifindex
+ cfg.remote_ifname = orig_remote_ifname
+ cfg.addr_v["4"] = orig_local_addr_v4
+ cfg.addr_v["6"] = orig_local_addr_v6
+ cfg.remote_addr_v["4"] = orig_remote_addr_v4
+ cfg.remote_addr_v["6"] = orig_remote_addr_v6
+ cfg.addr = orig_local_addr_v4
+ cfg.remote_addr = orig_remote_addr_v4
+
+ # Clean up VLAN interfaces
+ try:
+ ip(f"link del {local_vlan_ifname}")
+ except Exception:
+ pass
+ try:
+ ip(f"link del {remote_vlan_ifname}", host=cfg.remote)
+ except Exception:
+ pass
def psp_ip_ver_test_builder(name, test_func, psp_ver, ipver):
"""Build test cases for each combo of PSP version and IP version"""
@@ -622,7 +735,7 @@ def main() -> None:
]
ksft_run(cases=cases, globs=globals(),
- case_pfx={"dev_", "data_", "assoc_", "removal_"},
+ case_pfx={"dev_", "data_", "assoc_", "removal_", "vlan_"},
args=(cfg, ))
cfg.comm_sock.send(b"exit\0")
--
2.45.4
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