linux/tools/testing/selftests/net/Makefile, branch master

selftests/net: Split netdevsim tests from HW tests in nk_qlease

2026-04-14T15:17:01Z

As pointed out in 3d2c3d2eea9a ("selftests: net: py: explicitly forbid multiple ksft_run() calls"), ksft_run() cannot be called multiple times. Move the netdevsim-based queue lease tests to selftests/net/ so that each file has exactly one ksft_run() call. The HW tests (io_uring ZC RX, queue attrs, XDP with MP, destroy) remain in selftests/drivers/net/hw/. Fixes: 65d657d80684 ("selftests/net: Add queue leasing tests with netkit") Signed-off-by: Daniel Borkmann Link: https://lore.kernel.org/netdev/20260409181950.7e099b6c@kernel.org Reviewed-by: Nikolay Aleksandrov Link: https://patch.msgid.link/20260413220809.604592-3-daniel@iogearbox.net Signed-off-by: Jakub Kicinski

selftests: net: add bridge STP mode selection test

2026-04-10T22:52:25Z

Add a selftest for the IFLA_BR_STP_MODE bridge attribute that verifies: 1. stp_mode defaults to auto on new bridges 2. stp_mode can be toggled between user, kernel, and auto 3. Changing stp_mode while STP is active is rejected with -EBUSY 4. Re-setting the same stp_mode while STP is active succeeds 5. stp_mode user in a network namespace yields userspace STP (stp_state=2) 6. stp_mode kernel forces kernel STP (stp_state=1) 7. stp_mode auto in a netns preserves traditional fallback to kernel STP 8. stp_mode and stp_state can be set atomically in a single message 9. stp_mode persists across STP disable/enable cycles Test 5 is the key use case: it demonstrates that userspace STP can now be enabled in non-init network namespaces by setting stp_mode to user before enabling STP. Test 8 verifies the atomic usage pattern where both attributes are set in a single netlink message, which is supported because br_changelink() processes IFLA_BR_STP_MODE before IFLA_BR_STP_STATE. The test gracefully skips if the installed iproute2 does not support the stp_mode attribute. Assisted-by: Claude:claude-opus-4-6 Reviewed-by: Ido Schimmel Acked-by: Nikolay Aleksandrov Signed-off-by: Andy Roulin Link: https://patch.msgid.link/20260405205224.3163000-4-aroulin@nvidia.com Signed-off-by: Jakub Kicinski

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2026-04-09T20:20:59Z

Cross-merge networking fixes after downstream PR (net-7.0-rc8). Conflicts: net/ipv6/seg6_iptunnel.c c3812651b522f ("seg6: separate dst_cache for input and output paths in seg6 lwtunnel") 78723a62b969a ("seg6: add per-route tunnel source address") https://lore.kernel.org/adZhwtOYfo-0ImSa@sirena.org.uk net/ipv4/icmp.c fde29fd934932 ("ipv4: icmp: fix null-ptr-deref in icmp_build_probe()") d98adfbdd5c01 ("ipv4: drop ipv6_stub usage and use direct function calls") https://lore.kernel.org/adO3dccqnr6j-BL9@sirena.org.uk Adjacent changes: drivers/net/ethernet/stmicro/stmmac/chain_mode.c 51f4e090b9f8 ("net: stmmac: fix integer underflow in chain mode") 6b4286e05508 ("net: stmmac: rename STMMAC_GET_ENTRY() -> STMMAC_NEXT_ENTRY()") Signed-off-by: Jakub Kicinski

selftests: seg6: add test for dst_cache isolation in seg6 lwtunnel

2026-04-08T03:20:56Z

Add a selftest that verifies the dst_cache in seg6 lwtunnel is not shared between the input (forwarding) and output (locally generated) paths. The test creates three namespaces (ns_src, ns_router, ns_dst) connected in a line. An SRv6 encap route on ns_router encapsulates traffic destined to cafe::1 with SID fc00::100. The SID is reachable only for forwarded traffic (from ns_src) via an ip rule matching the ingress interface (iif veth-r0 lookup 100), and blackholed in the main table. The test verifies that: 1. A packet generated locally on ns_router does not reach ns_dst with an empty cache, since the SID is blackholed; 2. A forwarded packet from ns_src populates the input cache from table 100 and reaches ns_dst; 3. A packet generated locally on ns_router still does not reach ns_dst after the input cache is populated, confirming the output path does not reuse the input cache entry. Both the forwarded and local packets are pinned to the same CPU with taskset, since dst_cache is per-cpu. Cc: Shuah Khan Signed-off-by: Andrea Mayer Reviewed-by: Nicolas Dichtel Reviewed-by: Justin Iurman Link: https://patch.msgid.link/20260404004405.4057-3-andrea.mayer@uniroma2.it Signed-off-by: Jakub Kicinski

selftests: net: add test for Netlink policy dumps

2026-03-13T01:02:13Z

Add validation for the nlctrl family, accessing family info and dumping policies. TAP version 13 1..4 ok 1 nl_nlctrl.getfamily_do ok 2 nl_nlctrl.getfamily_dump ok 3 nl_nlctrl.getpolicy_dump ok 4 nl_nlctrl.getpolicy_by_op # Totals: pass:4 fail:0 xfail:0 xpass:0 skip:0 error:0 Link: https://patch.msgid.link/20260311032839.417748-5-kuba@kernel.org Signed-off-by: Jakub Kicinski

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2026-03-05T20:11:05Z

Cross-merge networking fixes after downstream PR (net-7.0-rc3). No conflicts. Adjacent changes: net/netfilter/nft_set_rbtree.c fb7fb4016300 ("netfilter: nf_tables: clone set on flush only") 3aea466a4399 ("netfilter: nft_set_rbtree: don't disable bh when acquiring tree lock") Signed-off-by: Jakub Kicinski

selftests: net: add macvlan multicast test for shared source MAC

2026-03-04T02:08:13Z

Add a selftest that verifies multicast delivery to a macvlan bridge port when the source MAC of the incoming frame matches the macvlan's own MAC address. This scenario occurs with protocols like VRRP where multiple hosts share the same virtual MAC address. Without the corresponding kernel change, macvlan bridge mode does not handle this case and the multicast frame is not delivered. Signed-off-by: Kibaek Yoo Link: https://patch.msgid.link/20260228071613.4360-2-psykibaek@gmail.com Signed-off-by: Jakub Kicinski

selftests: net: add ICMP error source address test over xfrm tunnel

2026-02-28T23:08:15Z

Test that ICMP error messages generated by an IPsec gateway use the correct source address (the gateway's address, not the unreachable destination). Signed-off-by: Antony Antony Link: https://patch.msgid.link/79d526f96cf2252d71550d38772876bc72c7e3c7.1772101380.git.antony.antony@secunet.com Signed-off-by: Jakub Kicinski

selftests: net: Add bridge VLAN range grouping tests

2026-02-27T03:24:29Z

Add a new test file bridge_vlan_dump.sh with four test cases that verify VLANs with different per-VLAN options are not incorrectly grouped into ranges in the dump output. The tests verify the kernel's br_vlan_opts_eq_range() function correctly prevents VLAN range grouping when neigh_suppress, mcast_max_groups, mcast_n_groups, or mcast_enabled options differ. Each test verifies that VLANs with different option values appear as individual entries rather than ranges, and that VLANs with matching values are properly grouped together. Example output: $ ./bridge_vlan_dump.sh TEST: VLAN range grouping with neigh_suppress [ OK ] TEST: VLAN range grouping with mcast_max_groups [ OK ] TEST: VLAN range grouping with mcast_n_groups [ OK ] TEST: VLAN range grouping with mcast_enabled [ OK ] Signed-off-by: Danielle Ratson Reviewed-by: Petr Machata Link: https://patch.msgid.link/20260225143956.3995415-3-danieller@nvidia.com Signed-off-by: Jakub Kicinski

selftests/net: add test for IP-in-IPv6 tunneling

2026-02-24T01:33:29Z

commit 81c734dae203 ("ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv()") was fine in and of itself, but its backport to 6.12 (and 6.6) broke IPv4-in-IPv6 tunneling, see [1]. This adds a self-test for basic IPv4-in-IPv6 and IPv6-in-IPv6 functionality. [1]: https://lore.kernel.org/all/CAA2RiuSnH_2xc+-W6EnFEG00XjS-dszMq61JEvRjcGS31CBw=g@mail.gmail.com/ Signed-off-by: Linus Heckemann Reviewed-by: Hangbin Liu Reviewed-by: Ricardo B. Marlière Tested-by: Ricardo B. Marlière Reviewed-by: Eric Dumazet Link: https://patch.msgid.link/20260221114806.1231666-1-git@sphalerite.org Signed-off-by: Jakub Kicinski