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11 daysMerge tag 'bpf-next-7.4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next Pull bpf updates from Alexei Starovoitov: "Major changes: - Introduce scalar evolution (SCEV) analysis in the verifier. It infers how registers and stack slots change in a loop and lets the verifier check bounded loops with induction variables as ranges instead of walking every iteration. The number of processed insns drops ten fold in programs with loops (Eduard Zingerman) - Add 'callx' instruction: indirect call of a static BPF subprogram. The address is taken with ld_imm64 or loaded from read-only data. Supported by x86-64, arm64 and riscv64 JITs (Alexei Starovoitov, Pu Lehui) - Add unwind_goto and unwind_exit instructions, so that Rust panic or C++ exception can run destructors of every frame it passes through. The normal path is free of unwind code. Supported by x86-64 and arm64 JITs (Alexei Starovoitov) - Support programs compiled by rust-bpf: treat load and store through a number as arena access with BPF_F_ARENA_SCALAR, accept rust names in BTF (Alexei Starovoitov) - Raise BPF program stack size from 512 bytes to 2 KiB on x86-64 and arm64 (Kumar Kartikeya Dwivedi) - Support struct, union and __int128 up to 16 bytes passed and returned by value in BPF subprograms and kfuncs, and fix x86-64 and arm64 trampolines for such arguments (Yonghong Song) - Introduce a common way to attach struct_ops to a cgroup via bpf_link. bpf_tcp_ops is the first user and mirrors TCP sock_ops callbacks (Martin KaFai Lau, Amery Hung) - Describe inlined functions in BTF. New kinds tell where the inline sites are and how to fetch the arguments there. CONFIG_DEBUG_INFO_BTF_INLINE keeps it apart from the main BTF in .BTF.inline section or in btf_vmlinux_inline.ko (Alan Maguire) - Fix many memory safety, lifetime and locking bugs in BPF core, verifier, iterators, local storage, dynptr, devmap, cpumap and seg6local (Josef Bacik, Alexei Starovoitov) - Diff stat is dominated by selftests and by removal of lib/test_bpf.c. Its 16k lines of instruction tests were converted to BPF selftests that BPF CI runs on every architecture it covers (Daniel Borkmann) Other features and fixes: - Add KASAN checks to memory accesses of JITed programs on x86-64 (Alexis Lothoré) - Complete unification of helper, kfunc and subprog argument checks in the verifier (Amery Hung) - Add bpf_copy_from_user_mm[_str]() kfuncs (Anastasios Papagiannis) - Various features and fixes (Daniel Borkmann): - Add .bpf keyring for program signature verification, modelled after dm-verity keyring, and support ML-DSA in signing tools - Emit shorter and faster code in x86-64 JIT for patterns that LLVM generates - Fix various issues in gotox handling - Let BPF LSM set xattrs at inode creation with bpf_inode_init_xattr() (David Windsor, Daniel Borkmann) - Use sleepable page allocation in sleepable arena paths. Fix races between arena free, allocation and user page fault (Emil Tsalapatis) - Switch BPF crypto from lskcipher to AES-CBC and AES-ECB libraries (Eric Biggers) - Add bpf_proactive_reclaim() kfunc (Hui Zhu) - Render decl_tags in libbpf btf_dump and add tests for bpftool C dump (Ihor Solodrai) - Speed up tracing_multi attach on x86 (Jiri Olsa) - Various features and fixes (Kumar Kartikeya Dwivedi): - Add BPF_PROG_STREAM_OPEN command to read BPF streams through a file descriptor with poll support - Let kernel structs publish arena pointers with __arena type tag - Fix __uninit kfunc output buffers and fastcall rewrite with indirect stack accesses - Refuse CO-RE relocations for signed programs - Add enqueue_rcvq and dequeue_rcvq hooks to bpf_tcp_ops to adjust sk_rcvlowat and avoid unnecessary wakeups (Kuniyuki Iwashima) - Add bpf_ksock_sendto() kfunc and allow ksock connect and send from bpf_wq (Mahe Tardy) - Fix racy plt target update in arm64 bpf_arch_text_poke() (Matthew Wood) - Restructure BPF selftests Makefile as a layered build (Mykola Lysenko) - Speed up hash map lookups for u32 and u64 keys (Mykyta Yatsenko) - Add signed div/mod, movsx, bswap and gotol to MIPS JITs, signed div/mod to parisc JITs (Nicholas Dudar, Johan Almbladh) - Fix stack overflow in build ID parser on 32-bit (Nickolai Zeldovich) - Add stack arguments, signed arena loads and gotox to riscv64 JIT. Pu Lehui is now co-maintainer of riscv BPF JITs (Pu Lehui, Chen Pei, Feng Jiang) - Add bpf_call_rcu() and bpf_call_rcu_tasks_trace() kfuncs. Support fetching and/or/xor atomics in arena on x86-64 (Puranjay Mohan) - Fix flaky selftests, selftests with clang 23 and bpf-gcc (Qiliang Yuan, KaFai Wan, Vineet Gupta) - Fix builds broken by fatal resolve_btfids warnings, BTF generation on ARC, and define arch_cmpxchg_local() on arc, hexagon and openrisc (Sasha Levin) - Reduce memory use of hash maps by up to 50% per element (T.J. Mercier) - Mark pointer fields of sched_ext ops arguments as trusted (Tejun Heo) - Remove legacy bpf_asm, bpf_dbg and bpf_jit_disasm tools (Xia Yan) - Fix index overflow in queue and stack maps, arena range tree after allocation failure, tail call loop after freplace detach, lost signal in bpf_send_signal() (Yuan Chen) - Many more fixes and cleanups" * tag 'bpf-next-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (660 commits) selftests/bpf: Time tc_edt from its first packet with data selftests/bpf: Test unwind_exit of an exception callback selftests/bpf: Tests for 32-bit scalar evolution bounds computation bpf: Reject unwind_goto and unwind_exit in offloaded progs bpf: Support 32-bit linear scalar evolution bpf: Make unwind_exit of an exception callback exit in JITs selftests/bpf: Test forbidden bpf_ksock_sendto() LSM attach selftests/bpf: Test ksock sendto() bpf: Add bpf_ksock_sendto() kfunc selftests/bpf: Test unwinding from R0: R2 subprog selftests/bpf: Add a C++ prog with exceptions selftests/bpf: Add tests for unwind_goto and unwind_exit bpf, arm64: Support unwind_goto and unwind_exit bpf, x86: Support unwind_goto and unwind_exit bpf: Add unwind_goto and unwind_exit insns tools/bpf: Remove legacy BPF tools bpf: Annotate data races on bpf_lru_node type selftests/bpf: Add arena allocation race tests bpf: Fix arena race between page free and alloc leading to incoherency bpf: Revalidate faulted arena pages before installing user mappings ...
13 daysMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netPaolo Abeni
Merge in late fixes in preparation for the net-next PR. Conflicts: net/netfilter/nf_conntrack_netlink.c cd37ab22a74e0 ("netfilter: nf_conntrack_netlink: fix inverted IPv6 tuple filter") 1ae2d094b0200 ("netfilter: ctnetlink: fix inverted IPv6 address match in dump filter") Adjacent changes: drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c 8830e65ed46de ("net: use assign_bit() where applicable") 07bd391eb957 ("octeontx2-af: Fix CQ enable state tracking after AQ writes") net/core/sock.c 31c5ea8a3296 ("ipv6: Remove IPV6_ADDRFORM.") 31b564f70d88 ("net: use the full socket in sk_mc_loop()") net/mptcp/protocol.h 0cb6910130a3 ("mptcp: remove thmac from subflow ctx") 7538fa33bb2f ("mptcp: fix subflow bitfield misuse") Signed-off-by: Paolo Abeni <pabeni@redhat.com>
14 daysselftests: net: add a test for the gtp netlink familyAnil Kaushik
Exercise the gtp generic netlink family through its ynl spec: create a gtp device, add a PDP context with newpdp, check getpdp dumps it on that device with the expected TEIDs and addresses, and that delpdp by TEI removes it. Two more cases check that two contexts are dumped and one can be deleted by its MS address, and that deleting an unknown context fails with ENOENT, both by TEI and by MS address. ynl resolves the family ids once per process, with a CTRL_CMD_GETFAMILY dump which does not autoload modules, so the gtp device is created before the family handle: that loads gtp.ko through its rtnl link alias. The test is skipped when the kernel or iproute2 lack GTP support; any other failure to create the device fails it. Add a GtpFamily ynl wrapper and register the test. Signed-off-by: Anil Kaushik <anilkaushikwireless@gmail.com> Link: https://patch.msgid.link/20261016093225.1036375-5-anilkaushikwireless@gmail.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-10-16selftests: net: add a test for GRO of GRE over FOU and GUEBrad Fitzpatrick
Send bulk TCP through GRE tunnels carried over UDP by FOU and by GUE, each over IPv4 and IPv6, with GRO on at the receiving veth and segmentation off at the sender so the receiver gets wire-sized packets to merge. Check that the receiver counts no UDP errors. Verified under virtme-ng: without the previous patch, all four cases fail, with the encapsulation socket counting every merged packet in UdpInErrors or Udp6InErrors. With it, they pass in a few seconds. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> Link: https://patch.msgid.link/20261011-bradfitz-gre-fou-gro-b4-v1-2-df713aad1531@tailscale.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-10-15selftests/bpf: Remove the old test_bpf moduleDaniel Borkmann
The instruction tests of the test_bpf module live in the BPF selftests now, as the jit_insns test of test_progs, which BPF CI runs on every architecture it covers, and its skb_segment tests have a KUnit successor in net/core/net_test.c. Remove the module together with its Kconfig entry, the test_kmod.sh and test_bpf.sh wrappers of the bpf and net selftests, the config fragments and defconfigs that enabled it, as well as all other references to it and symbol exports in core kernel. For archs wanting to support BPF JITs, it's time they move over to the BPF selftests for proper coverage. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20261013171230.523677-19-daniel@iogearbox.net Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
2026-10-05selftests/net: add SO_RESERVE_MEM testEric Dumazet
Add a kselftest suite covering SO_RESERVE_MEM behavior: - Reject unsupported socket types (UDP/SOCK_DGRAM, UNIX/SOCK_STREAM, SOCK_RAW, MPTCP) with EOPNOTSUPP, for both zero and non-zero values. - Validate bounds (negative values and values > SZ_1G return EINVAL). - Verify reserve adjustments (increase, decrease, page rounding, and reset to 0) and corresponding sk_meminfo[SK_MEMINFO_FWD_ALLOC] changes via getsockopt(SO_MEMINFO). - Exercise cgroup v2 memory.max enforcement returning ENOMEM when the requested reservation exceeds the cgroup limit. - Verify that a child socket returned by accept() starts with a 0 reserve even when its parent listener configured a non-zero SO_RESERVE_MEM. - Verify reserve retention across TCP send/receive/ACK cycles. Each test runs in private mount and network namespaces. cgroup2 is mounted on a private tmpfs, so nothing is left behind in the host filesystem. The test process is moved to a dedicated leaf cgroup, and back to its original cgroup on teardown. The memory controller is enabled in the root of the hierarchy if needed, and left enabled like selftests/cgroup do, as disabling it could break other users. Also enable CONFIG_CGROUPS=y and CONFIG_MEMCG=y in tools/testing/selftests/net/config. Signed-off-by: Eric Dumazet <edumazet@kernel.org> Link: https://patch.msgid.link/20261001192137.309983-1-edumazet@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-10-01Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR (net-7.3-rc6). Conflicts: net/mac80211/tx.c net/mac80211/ieee80211_i.h 8effab902fa34 ("wifi: mac80211: prevent AP VLAN tx from other interfaces") 78b843974fb83 ("wifi: mac80211: report multicast transmission from lookup_ra_sta()") https://lore.kernel.org/arJmcuhpJ69wAvYK@sirena.co.uk drivers/net/ethernet/realtek/r8169_main.c 3cdeaef1754ab ("r8169: disable EEE on RTL8168h/8111h") 8a3c76523e449 ("r8169: add support for phylink") https://lore.kernel.org/ar5vAxEqS8tO8aVT@sirena.org.uk Adjacent changes: rust/kernel/net/netlink.rs 5e5916923759 ("rust: net: netlink: Migrate to zerocopy's IntoBytes") 0923198be4ae ("rust: net: netlink: validate attribute length before casting to `c_int`") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-09-29selftests: net: cover UDP splice checksum fragment alignmentAlireza Asgari
Exercise software UDP checksums when splice() transfers multiple pipe fragments into a corked datagram. Use separate source pipes so short writes cannot merge, and use odd fragment lengths to expose checksum-position errors between fragments. Cover IPv4, IPv6 and IPv4-mapped destinations, connected and unconnected sockets, resident prefixes, even and odd fragment lengths, and a fragment starting near a page boundary. Ordinary sends provide a control. Check the complete payload and reject extra datagrams after a successful send. Keep receive waits bounded and skip unavailable address families or pipe capacities. The test uses only loopback sockets with ephemeral ports and has no dependency on the application that exposed the regression. Signed-off-by: Alireza Asgari <alireza@asgari.net> Link: https://patch.msgid.link/20260924-fix-udp-splice-checksum-v1-2-fe61d65447a8@asgari.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-09-29selftests: net: add test for netdev instance lock ordering on unregisterJakub Kicinski
Dismantle two netns holding a dummy and a netkit pair registered in opposite order. unregister_netdevice_many_notify() takes the instance locks of all the devices at once, nesting the two kinds of devices one way for the first netns and the other way for the second. With lockdep enabled this used to trigger a circular locking report. Acked-by: Stanislav Fomichev <sdf@fomichev.me> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org> Link: https://patch.msgid.link/20260926041832.1649675-2-kuba@kernel.org Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-09-07selftests: net: Test UDP length overflow with PMTU discover and big MTUAlice Mikityanska
Two previous commits fixed overflow of UDP length when setsockopt IP(V6)_MTU_DISCOVER is set to IPV6_PMTUDISC_DO or IP(V6)_PMTUDISC_PROBE, and a large packet is sent over a netdev with an unusually large MTU. This commit adds the selftests that replicate the described steps to reproduce for IPv6 and IPv4, and also one more test that ensures that sending UDP jumbograms over a raw socket is still possible after the fix. Signed-off-by: Alice Mikityanska <alice@isovalent.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20260901195714.673548-4-alice.kernel@fastmail.im Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-31selftests: net: Add exception cache testsIdo Schimmel
Add a test for the IPv4 and IPv6 exception caches, covering the exceptions that are created in response to ICMP errors quoting a UDP packet. The topology consists of a host (h1) that reaches a remote host (h2) via a router (r1), with a second router (r2) attached to the segment shared by h1 and r1. UDP packets are injected using a packet socket, so that an ICMP error quoting them is only matched to a socket when one was opened separately with the same source port. PMTU errors are provoked by lowering the MTU of the far end of the path and redirects by pointing r1's route towards h2 back over the segment it received the packet from. The following is tested for both address families and for both PMTU and redirect exceptions: * An error that is not matched to a socket creates an exception that carries the new MTU or gateway. * An error that is matched to a socket creates the same exception. The PMTU tests further verify that a lower PMTU replaces the one stored in the exception whereas a higher one does not, and that a socket which disabled PMTU discovery using IP{,V6}_PMTUDISC_OMIT gets the same exception as the other cases. Without "ipv4: udp: Create exceptions before socket matching" and "ipv6: udp: Create exceptions before socket matching", the tests that do not open a socket fail: # ./exception_cache.sh TEST: IPv4: PMTU: exception without a matching socket [FAIL] No socket: exception does not carry an MTU of 1400 TEST: IPv6: PMTU: exception without a matching socket [FAIL] No socket: exception does not carry an MTU of 1400 TEST: IPv4: PMTU: exception with a matching socket [ OK ] TEST: IPv6: PMTU: exception with a matching socket [ OK ] TEST: IPv4: PMTU: exception with a socket ignoring it [FAIL] PMTU discovery disabled: exception does not carry an MTU of 1400 TEST: IPv6: PMTU: exception with a socket ignoring it [FAIL] PMTU discovery disabled: exception does not carry an MTU of 1400 TEST: IPv4: Redirect: exception without a matching socket [FAIL] No socket: exception does not carry the new gateway TEST: IPv6: Redirect: exception without a matching socket [FAIL] No socket: exception does not carry the new gateway TEST: IPv4: Redirect: exception with a matching socket [ OK ] TEST: IPv6: Redirect: exception with a matching socket [ OK ] Signed-off-by: Ido Schimmel <idosch@nvidia.com> Link: https://patch.msgid.link/20260828192344.2596928-5-idosch@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-08-17selftests: net: separate ipv6_flowlabel_mgr testMarcelo Mendes Spessoto Junior
The ipv6_flowlabel_mgr used to be a component of a broader overall flow label test, defined in the ipv6_flowlabel.sh file. This wrapper script called tests defined on ipv6_flowlabel.c and ipv6_flowlabel_mgr.c files, using predefined parameters and enforcing the in_netns.sh helper to set network namespaces for each test env. However, the ipv6_flowlabel_mgr.c was drastically changed recently. These modifications led to the mgr tests becoming a self contained and independent test suite, enforcing netns creation by itself and not relying on the ipv6_flowlabel.sh wrapper for proper test execution anymore. Therefore, remove the mgr tests from the wrapper and update the Makefile to handle it as a standalone test program instead. Signed-off-by: Marcelo Mendes Spessoto Junior <marcelomspessoto@gmail.com> Reviewed-by: Hangbin Liu <liuhangbin@kylinos.cn> Link: https://patch.msgid.link/20260813030708.37609-1-marcelomspessoto@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-07-22selftests: seg6: add test for post-encap SID route lookupAndrea Mayer
Add a selftest for the SEG6_IPTUNNEL_TABLE attribute, which selects the FIB table for the post-encap SID route lookup. This looks up the route for the first SID, the outer destination of the encapsulated packet. Two routers provide L3 VPN services over an IPv6 underlay. Each router uses a separate VRF per tenant, with default blackhole routes (IPv4 and IPv6) that drop unmatched traffic. Tenant traffic is encapsulated, then decapsulated with an End.DT46. The encap routes are installed in the tenant VRF, but the routes that match the first SIDs live in a separate underlay table (500). The "lookup 500" attribute points the lookup there rather than to the VRF. The test covers both the input path, where forwarded host traffic triggers encapsulation, and the output path, where a router originates traffic from its own loopback inside a VRF. With the "lookup" attribute, traffic reaches its destination on both paths. Without it, on the input path the lookup stays in the VRF and hits the blackhole, and on the output path it falls through to the main table, which has no matching route. Signed-off-by: Andrea Mayer <andrea.mayer@uniroma2.it> Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Link: https://patch.msgid.link/20260711162907.6521-3-andrea.mayer@uniroma2.it Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-07-22Merge branch 'big-tcp-for-udp-tunnels'Paolo Abeni
Alice Mikityanska says: ==================== BIG TCP for UDP tunnels This series is a follow-up to "BIG TCP without HBH in IPv6", and it adds support for BIG TCP IPv4/IPv6 workloads in vxlan and geneve. Now that IPv6 BIG TCP doesn't require stripping the HBH in all various combinations in tunneled traffic, adding BIG TCP becomes feasible. Patch 01 adds accessors for the length field in the UDP header, as suggested by Paolo in review. The usage of udp_set_len is then added in the following patches that start using length=0 in BIG TCP UDP packets. Patches 02-04 close the gaps that prevent BIG TCP packets from going through UDP tunnel code. Patch 05 validates packets in udp_gro_receive to exclude packets with length=0 from GRO aggregation. Patch 06 is for proper formatting in tcpdump (set UDP len to 0 rather than a trimmed value on overflow). Patches 07-08 bump up tso_max_size for VXLAN and GENEVE. Patch 09 adds selftests. ====================$ Link: https://patch.msgid.link/20260710134242.216538-1-alice.kernel@fastmail.im Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-07-22selftests: net: Add a test for BIG TCP in UDP tunnelsAlice Mikityanska
The test sets up VXLAN and GENEVE tunnels over IPv4 and IPv6 and runs IPv4 and IPv6 traffic through them with BIG TCP enabled. It checks that a non-negligible amount of big aggregated packets are seen by setting up iptables counters. Check the number of packets on both TX and RX sides to verify that GSO packets are valid and not dropped. Capture on the lower netdev (veth), when checksum offload is on, to verify that encapsulated BIG TCP packets can get to their destination. In the test with TX checksum offload off, software GSO splits aggregated VXLAN packets before passing them to veth, so capture inside the tunnel instead to check that the big packets are not dropped. Check that the amount of SACKs is negligible. On unsupported kernels, some amount of broken GSO packets bigger than 65536 bytes can be produced in VXLAN tunnels, but they don't reach the destination. Seeing TCP SACKs is a sign that such packets could have been dropped (in such cases, the amount of SACKs is a few times bigger than the number of attempts to send BIG TCP packets). Signed-off-by: Alice Mikityanska <alice@isovalent.com> Link: https://patch.msgid.link/20260710134242.216538-10-alice.kernel@fastmail.im Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-07-21selftests: net: add FOU multicast encapsulation resubmit testAnton Danilov
Add a selftest to verify that FOU-encapsulated packets addressed to a multicast destination are correctly resubmitted to the inner protocol handler (GRE) via the UDP multicast delivery path. Both IPv4 and IPv6 paths are tested. The test creates two network namespaces connected by a veth pair with a FOU/GRETAP (IPv4) and FOU/ip6gretap (IPv6) tunnel using multicast remote addresses (239.0.0.1 and ff0e::1). Ping is sent through each tunnel and received packets are counted on the receiver's tunnel interface. The veth pair is created directly inside the namespaces to avoid possible name collisions with devices in the root namespace. Static neighbor entries are configured on the sender because ARP/ND replies from the receiver cannot traverse the unidirectional multicast tunnel back to the sender. The early demux optimization (net.ipv4.ip_early_demux, which controls both IPv4 and IPv6) is disabled on the receiver to force packets through __udp4_lib_mcast_deliver() / __udp6_lib_mcast_deliver(), which is the code path being tested. Signed-off-by: Anton Danilov <littlesmilingcloud@gmail.com> Assisted-by: Claude:claude-opus-4-6 Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/a5b65f092d22a12b52fc536c0565b948cd8ecae3.1783372173.git.littlesmilingcloud@gmail.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-06-15selftests: net: add local ECMP rehash testNeil Spring
Add ecmp_rehash.sh with nine scenarios verifying that TCP rehash selects a different local ECMP path for IPv6: - SYN retransmission (forward path blocked during setup) - SYN/ACK retransmission (reverse path blocked during setup) - Midstream RTO (forward path blocked on established connection) - Midstream ACK rehash (reverse path blocked on established connection) - PLB rehash (ECN-driven congestion on established connection) - Hash policy 1 negative test (rehash attempted but path unchanged) - No flowlabel leak (client mp_hash does not alter on-wire flowlabel) - Dst rebuild consistency (dst invalidation does not change path) - Syncookie server path consistency (SYN-ACK and post-cookie ACKs use the same ECMP path) The policy 1 test verifies that fib_multipath_hash_policy=1 computes a deterministic 5-tuple hash, so txhash re-rolls do not change the ECMP path while TcpTimeoutRehash still increments. The flowlabel leak test sets auto_flowlabels=0 on the client and installs tc filters on client egress that drop TCP packets with nonzero flowlabel, confirming that the client's fl6->mp_hash does not leak into the on-wire IPv6 flow label. The PLB test needs DCTCP, a restricted congestion control. Rather than relax the host-global tcp_allowed_congestion_control (no per-netns equivalent), it pins dctcp on the test routes via the congctl route attribute, confined to the test namespaces. The dst rebuild test streams data, invalidates the cached dst by adding and removing a dummy route (bumping the fib6_node sernum), and verifies that traffic stays on the same path. The sernum change causes ip6_dst_check() to fail on the next transmit, triggering a fresh route lookup via inet6_csk_route_socket(). ECMP_REBUILD_ROUNDS=10 repeats the check to reduce the probability of a buggy kernel passing by chance with 2-way ECMP. The syncookie server path consistency test verifies that the server's SYN-ACK and subsequent ACKs use the same ECMP path. With syncookies, the request socket is freed after the SYN-ACK, so cookie_tcp_reqsk_init() must derive the same txhash (from the cookie) that was used for the SYN-ACK's route lookup. The syncookie test forces tcp_syncookies=2; it skips when CONFIG_SYN_COOKIES is not available. selftests/net/config selects it (and CONFIG_TCP_CONG_DCTCP for the PLB test). Signed-off-by: Neil Spring <ntspring@meta.com> Link: https://patch.msgid.link/20260615042158.1600746-3-ntspring@meta.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-06-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR (net-7.1-rc7). Silent conflicts: net/wireless/nl80211.c cb9959ab5f99 ("wifi: cfg80211: enforce HE/EHT cap/oper consistency") a384ae969902 ("wifi: cfg80211: move AP HT/VHT/... operation to beacon info") https://lore.kernel.org/aiGJDaHV4UlCexIQ@sirena.org.uk Conflicts: drivers/net/wireless/intel/iwlwifi/mld/ap.c a342c99cb70d ("wifi: iwlwifi: mld: honor BSS_CHANGED_BEACON_ENABLED") 9bf1b409afc7 ("wifi: iwlwifi: mld: send tx power constraints before link activation") https://lore.kernel.org/ah2bfedhV45ZxMO8@sirena.org.uk drivers/net/wireless/intel/iwlwifi/pcie/drv.c 093305d801fa ("wifi: iwlwifi: pcie: simplify the resume flow if fast resume is not used") e2323929a68a ("wifi: iwlwifi: pcie: add debug print for resume flow if powered off") https://lore.kernel.org/ah2bfedhV45ZxMO8@sirena.org.uk Adjacent changes: drivers/net/ethernet/airoha/airoha_eth.c b38cae85d1c4 ("net: airoha: Fix use-after-free in metadata dst teardown") ec6c391bcca7 ("net: airoha: Introduce airoha_gdm_dev struct") drivers/net/ethernet/microchip/lan743x_main.c 8173d22b211f ("net: lan743x: permit VLAN-tagged packets up to configured MTU") e3c6508a46f5 ("net: lan743x: avoid netdev-based logging before netdev registration") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-06-04selftests: net: add vxlan vnifilter notification testAndy Roulin
Add a selftest for VXLAN vnifilter netlink notifications that verifies RTM_NEWTUNNEL and RTM_DELTUNNEL are sent correctly when VNIs are added, deleted, or updated, and that no spurious notifications are sent when a VNI is re-added with the same attributes. Signed-off-by: Andy Roulin <aroulin@nvidia.com> Acked-by: Petr Machata <petrm@nvidia.com> Link: https://patch.msgid.link/20260602185138.253265-4-aroulin@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-05-08selftests: net: Add protodown testsIdo Schimmel
Add a selftest for the protodown mechanism. Five test cases are included: 1. Basic protodown toggling: Verify that setting protodown on macvlan results in DOWN operational state and clearing it restores UP. 2. Same as the previous test case, but with vxlan. 3. Protodown reasons: Verify that protodown cannot be cleared while there are active protodown reasons, but can be cleared once all reasons are removed. 4. Protodown with lower device being toggled: Verify that toggling the lower device's carrier while protodown is on does not cause the macvlan to gain carrier. 5. Protodown with lower device down: Verify that toggling protodown while the lower device has no carrier does not cause the macvlan to gain carrier. Note that the last two test cases fail without "net: Do not turn on carrier when protodown is on" and "net: Do not unconditionally turn on carrier when turning off protodown": # ./protodown.sh TEST: Basic protodown on/off with macvlan [ OK ] TEST: Basic protodown on/off with vxlan [ OK ] TEST: Protodown reasons [ OK ] TEST: Protodown with lower device toggled [FAIL] Macvlan operational state is not DOWN despite protodown TEST: Protodown with lower device down [FAIL] Macvlan is not LOWERLAYERDOWN after clearing protodown Assisted-by: Claude:claude-opus-4-6 Signed-off-by: Ido Schimmel <idosch@nvidia.com> Link: https://patch.msgid.link/20260507105906.891817-5-idosch@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-05-07Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR (net-7.1-rc3). Conflicts: net/ipv4/igmp.c 726fa7da2d8c ("ipv4: igmp: get rid of IGMPV3_{QQIC,MRC} and simplify calculation") c6bebaa744f7 ("ipv4: igmp: annotate data-races in igmp_heard_query()") https://lore.kernel.org/a7365e4873340f7a5e30411207de3bf9@kernel.org Adjacent changes: net/psp/psp_main.c 30cb24f97d44 ("psp: strip variable-length PSP header in psp_dev_rcv()") c2b22277ad89 ("psp: validate IPv4 header fields in psp_dev_rcv()") net/sched/sch_fq_codel.c f83e07b29246 ("net/sched: sch_fq_codel: annotate data-races from fq_codel_dump_class_stats()") 3f3aa77ff1c8 ("net/sched: add qstats_cpu_drop_inc() helper") net/wireless/pmsr.c 0f3c0a197309 ("wifi: nl80211: fix NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST usage") 410aa47fd9d3 ("wifi: cfg80211: allow suppressing FTM result reporting for PD requests") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-05-05selftests: drv-net: convert so_txtime to drv-netWillem de Bruijn
In preparation for extending to pacing hardware offload, convert the so_txtime.sh test to a drv-net test that can be run against netdevsim and real hardware. Also update so_txtime.c to not exit on first failure, but run to completion and report exit code there. This helps with debugging unexpected results, especially when processing multiple packets, as happens in the "reverse_order" testcase. Signed-off-by: Willem de Bruijn <willemb@google.com> ---- v6 -> v7 - update test to use new argument expect_fail - v6 received Reviewed-by, but dropped due to above (minor) change v5 -> v6 - fix order in tools/testing/selftests/drivers/net/config v4 -> v5 - move qdisc setup/restore into each test - add tc to utils.py (separate patch) - test expected failure (separate patch) - fix pylint - convert fail to pass for timing errors if KSFT_MACHINE_SLOW (cmd does not special case KSFT_SKIP process returncode yet) Responses to sashiko review - The test converts per packet failure to errors, to continue testing other packets, but other error() cases are not in scope. - The test starts sender and receiver at an absolute future time, like the original test. This assumes ~msec scale sync'ed clocks. - The tc qdisc replace command works fine with noqueue. Tested manually. v3 -> v4 - restore original qdisc after test - drop unnecessary underscore in tap test names v2 -> v3 - Makefile: so_txtime from YNL_GEN_FILES to TEST_GEN_FILES (Sashiko, NIPA) v1 -> v2 - move so_txtime.c for net/lib to drivers/net (Jakub) - fix drivers/net/config order (Jakub) - detect passing when failure is expected (Jakub, Sashiko) - pass pylint --disable=R (Jakub) - only call ksft_run once (Jakub) - do not sleep if waiting time is negative (Sashiko) - add \n when converting error() to fprintf() (Sashiko) - 4 space indentation, instead of 2 space - increase sync delay from 100 to 200ms, to fix rare vng flakes Link: https://patch.msgid.link/20260504174056.565319-4-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-05-04net: selftests: add getsockopt_iter regression testsBreno Leitao
Add a single kselftest covering the proto_ops getsockopt_iter conversions for AF_NETLINK and AF_VSOCK, using one fixture per protocol: netlink: NETLINK_PKTINFO covers the flag-style int path (exact size, oversize clamp, undersize -EINVAL); NETLINK_LIST_MEMBERSHIPS covers the size-discovery path that always reports the required buffer length back via optlen, even when the user buffer is too small to receive any group bits. vsock: SO_VM_SOCKETS_BUFFER_SIZE covers the u64 path (exact size, oversize clamp, undersize -EINVAL). Each fixture also exercises an unknown optname and a bogus level so the returned-length / errno semantics preserved by the sockopt_t conversion are pinned down. Signed-off-by: Breno Leitao <leitao@debian.org> Reviewed-by: Bobby Eshleman <bobbyeshleman@meta.com> Acked-by: Stanislav Fomichev <sdf@fomichev.me> Link: https://patch.msgid.link/20260501-getsock_one-v1-3-810ce23ea70e@debian.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-05-01selftest: net: Add test for TCP flow failover with ECMP routes.Kuniyuki Iwashima
Without the previous commit, TCP failed to switch to alternative IPv6 routes immediately upon carrier loss. It would persist with the dead route until reaching the threshold net.ipv4.tcp_retries1, leading to unnecessary delays in failover. Let's add a selftest for this scenario to ensure TCP fails over immediately upon a carrier loss event. Before: TEST: TCP IPv4 failover [ OK ] TEST: TCP IPv6 failover [FAIL] After: TEST: TCP IPv4 failover [ OK ] TEST: TCP IPv6 failover [ OK ] Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com> Signed-off-by: Sagarika Sharma <sharmasagarika@google.com> Link: https://patch.msgid.link/20260430200909.527827-3-sharmasagarika@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-14selftests/net: Split netdevsim tests from HW tests in nk_qleaseDaniel Borkmann
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 <daniel@iogearbox.net> Link: https://lore.kernel.org/netdev/20260409181950.7e099b6c@kernel.org Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org> Link: https://patch.msgid.link/20260413220809.604592-3-daniel@iogearbox.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-10selftests: net: add bridge STP mode selection testAndy Roulin
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 <idosch@nvidia.com> Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com> Signed-off-by: Andy Roulin <aroulin@nvidia.com> Link: https://patch.msgid.link/20260405205224.3163000-4-aroulin@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
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 <kuba@kernel.org>
2026-04-07selftests: seg6: add test for dst_cache isolation in seg6 lwtunnelAndrea Mayer
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 <shuah@kernel.org> Signed-off-by: Andrea Mayer <andrea.mayer@uniroma2.it> Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Reviewed-by: Justin Iurman <justin.iurman@gmail.com> Link: https://patch.msgid.link/20260404004405.4057-3-andrea.mayer@uniroma2.it Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-03-12selftests: net: add test for Netlink policy dumpsJakub Kicinski
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 <kuba@kernel.org>
2026-03-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
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 <kuba@kernel.org>
2026-03-03selftests: net: add macvlan multicast test for shared source MACKibaek Yoo
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 <psykibaek@gmail.com> Link: https://patch.msgid.link/20260228071613.4360-2-psykibaek@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-28selftests: net: add ICMP error source address test over xfrm tunnelAntony Antony
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 <antony.antony@secunet.com> Link: https://patch.msgid.link/79d526f96cf2252d71550d38772876bc72c7e3c7.1772101380.git.antony.antony@secunet.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-26selftests: net: Add bridge VLAN range grouping testsDanielle Ratson
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 <danieller@nvidia.com> Reviewed-by: Petr Machata <petrm@nvidia.com> Link: https://patch.msgid.link/20260225143956.3995415-3-danieller@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-02-23selftests/net: add test for IP-in-IPv6 tunnelingLinus Heckemann
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 <git@sphalerite.org> Reviewed-by: Hangbin Liu <liuhangbin@gmail.com> Reviewed-by: Ricardo B. Marlière <rbm@suse.com> Tested-by: Ricardo B. Marlière <rbm@suse.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Link: https://patch.msgid.link/20260221114806.1231666-1-git@sphalerite.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-01-23selftest: tun: Refactor tun_delete to use tuntap_helpersXu Du
The previous patch introduced common tuntap helpers to simplify tun test code. This patch refactors the tun_delete function to use these new helpers. Signed-off-by: Xu Du <xudu@redhat.com> Link: https://patch.msgid.link/ecc7c0c2d75d87cb814e97579e731650339703ab.1768979440.git.xudu@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-01-23selftests: net: tests for add double tunneling GRO/GSOPaolo Abeni
Create a simple, netns-based topology with double, nested UDP tunnels and perform TSO transfers on top. Explicitly enable GSO and/or GRO and check the skb layout consistency with different configuration allowing (or not) GSO frames to be delivered on the other end. The trickest part is account in a robust way the aggregated/unaggregated packets with double encapsulation: use a classic bpf filter for it. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Petr Machata <petrm@nvidia.com> Link: https://patch.msgid.link/61f2c98ba0f73057c2d6f6cb62eb807abd90bf6b.1769011015.git.pabeni@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-01-22Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR (net-6.19-rc7). Conflicts: drivers/net/ethernet/huawei/hinic3/hinic3_irq.c b35a6fd37a00 ("hinic3: Add adaptive IRQ coalescing with DIM") fb2bb2a1ebf7 ("hinic3: Fix netif_queue_set_napi queue_index input parameter error") https://lore.kernel.org/fc0a7fdf08789a52653e8ad05281a0a849e79206.1768915707.git.zhuyikai1@h-partners.com drivers/net/wireless/ath/ath12k/mac.c drivers/net/wireless/ath/ath12k/wifi7/hw.c 31707572108d ("wifi: ath12k: Fix wrong P2P device link id issue") c26f294fef2a ("wifi: ath12k: Move ieee80211_ops callback to the arch specific module") https://lore.kernel.org/20260114123751.6a208818@canb.auug.org.au Adjacent changes: drivers/net/wireless/ath/ath12k/mac.c 8b8d6ee53dfd ("wifi: ath12k: Fix scan state stuck in ABORTING after cancel_remain_on_channel") 914c890d3b90 ("wifi: ath12k: Add framework for hardware specific ieee80211_ops registration") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-01-22selftests: net: Add kernel selftest for RFC 4884Danielle Ratson
RFC 4884 extended certain ICMP messages with a length attribute that encodes the length of the "original datagram" field. This is needed so that new information could be appended to these messages without applications thinking that it is part of the "original datagram" field. In version 5.9, the kernel was extended with two new socket options (SOL_IP/IP_RECVERR_4884 and SOL_IPV6/IPV6_RECVERR_RFC4884) that allow user space to retrieve this length which is basically the offset to the ICMP Extension Structure at the end of the ICMP message. This is required by user space applications that need to parse the information contained in the ICMP Extension Structure. For example, the RFC 5837 extension for tracepath. Add a selftest that verifies correct handling of the RFC 4884 length field for both IPv4 and IPv6, with and without extension structures, and validates that malformed extensions are correctly reported as invalid. For each address family, the test creates: - a raw socket used to send locally crafted ICMP error packets to the loopback address, and - a datagram socket used to receive the encapsulated original datagram and associated error metadata from the kernel error queue. ICMP packets are constructed entirely in user space rather than relying on kernel-generated errors. This allows the test to exercise invalid scenarios (such as corrupted checksums and incorrect length fields) and verify that the SO_EE_RFC4884_FLAG_INVALID flag is set as expected. Output Example: $ ./icmp_rfc4884 Starting 18 tests from 18 test cases. RUN rfc4884.ipv4_ext_small_payload.rfc4884 ... OK rfc4884.ipv4_ext_small_payload.rfc4884 ok 1 rfc4884.ipv4_ext_small_payload.rfc4884 RUN rfc4884.ipv4_ext.rfc4884 ... OK rfc4884.ipv4_ext.rfc4884 ok 2 rfc4884.ipv4_ext.rfc4884 RUN rfc4884.ipv4_ext_large_payload.rfc4884 ... OK rfc4884.ipv4_ext_large_payload.rfc4884 ok 3 rfc4884.ipv4_ext_large_payload.rfc4884 RUN rfc4884.ipv4_no_ext_small_payload.rfc4884 ... OK rfc4884.ipv4_no_ext_small_payload.rfc4884 ok 4 rfc4884.ipv4_no_ext_small_payload.rfc4884 RUN rfc4884.ipv4_no_ext_min_payload.rfc4884 ... OK rfc4884.ipv4_no_ext_min_payload.rfc4884 ok 5 rfc4884.ipv4_no_ext_min_payload.rfc4884 RUN rfc4884.ipv4_no_ext_large_payload.rfc4884 ... OK rfc4884.ipv4_no_ext_large_payload.rfc4884 ok 6 rfc4884.ipv4_no_ext_large_payload.rfc4884 RUN rfc4884.ipv4_invalid_ext_checksum.rfc4884 ... OK rfc4884.ipv4_invalid_ext_checksum.rfc4884 ok 7 rfc4884.ipv4_invalid_ext_checksum.rfc4884 RUN rfc4884.ipv4_invalid_ext_length_small.rfc4884 ... OK rfc4884.ipv4_invalid_ext_length_small.rfc4884 ok 8 rfc4884.ipv4_invalid_ext_length_small.rfc4884 RUN rfc4884.ipv4_invalid_ext_length_large.rfc4884 ... OK rfc4884.ipv4_invalid_ext_length_large.rfc4884 ok 9 rfc4884.ipv4_invalid_ext_length_large.rfc4884 RUN rfc4884.ipv6_ext_small_payload.rfc4884 ... OK rfc4884.ipv6_ext_small_payload.rfc4884 ok 10 rfc4884.ipv6_ext_small_payload.rfc4884 RUN rfc4884.ipv6_ext.rfc4884 ... OK rfc4884.ipv6_ext.rfc4884 ok 11 rfc4884.ipv6_ext.rfc4884 RUN rfc4884.ipv6_ext_large_payload.rfc4884 ... OK rfc4884.ipv6_ext_large_payload.rfc4884 ok 12 rfc4884.ipv6_ext_large_payload.rfc4884 RUN rfc4884.ipv6_no_ext_small_payload.rfc4884 ... OK rfc4884.ipv6_no_ext_small_payload.rfc4884 ok 13 rfc4884.ipv6_no_ext_small_payload.rfc4884 RUN rfc4884.ipv6_no_ext_min_payload.rfc4884 ... OK rfc4884.ipv6_no_ext_min_payload.rfc4884 ok 14 rfc4884.ipv6_no_ext_min_payload.rfc4884 RUN rfc4884.ipv6_no_ext_large_payload.rfc4884 ... OK rfc4884.ipv6_no_ext_large_payload.rfc4884 ok 15 rfc4884.ipv6_no_ext_large_payload.rfc4884 RUN rfc4884.ipv6_invalid_ext_checksum.rfc4884 ... OK rfc4884.ipv6_invalid_ext_checksum.rfc4884 ok 16 rfc4884.ipv6_invalid_ext_checksum.rfc4884 RUN rfc4884.ipv6_invalid_ext_length_small.rfc4884 ... OK rfc4884.ipv6_invalid_ext_length_small.rfc4884 ok 17 rfc4884.ipv6_invalid_ext_length_small.rfc4884 RUN rfc4884.ipv6_invalid_ext_length_large.rfc4884 ... OK rfc4884.ipv6_invalid_ext_length_large.rfc4884 ok 18 rfc4884.ipv6_invalid_ext_length_large.rfc4884 PASSED: 18 / 18 tests passed. Totals: pass:18 fail:0 xfail:0 xpass:0 skip:0 error:0 Signed-off-by: Danielle Ratson <danieller@nvidia.com> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20260121114644.2863640-1-danieller@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-01-19selftests: net: simple selftest for ipvtapDmitry Skorodumov
This is a simple ipvtap test to test handling IP-address add/remove on ipvlan interface. It creates a veth-interface and then creates several network-namespace with ipvlan0 interface in it linked to veth. Then it starts to add/remove addresses on ipvlan0 interfaces in several threads. At finish, it checks that there is no duplicated addresses. Signed-off-by: Dmitry Skorodumov <skorodumov.dmitry@huawei.com> Link: https://patch.msgid.link/20260112142417.4039566-3-skorodumov.dmitry@huawei.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-11-20selftests: net: relocate gro and toeplitz tests to drivers/netJakub Kicinski
The GRO test can run on a real device or a veth. The Toeplitz hash test can only run on a real device. Move them from net/ to drivers/net/ and drivers/net/hw/ respectively. There are two scripts which set up the environment for these tests setup_loopback.sh and setup_veth.sh. Move those scripts to net/lib. The paths to the setup files are a little ugly but they will be deleted shortly. toeplitz_client.sh is not a test in itself, but rather a helper to send traffic, so add it to TEST_FILES rather than TEST_PROGS. Reviewed-by: Petr Machata <petrm@nvidia.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20251120021024.2944527-6-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-06selftests: net: unify the Makefile formatsJakub Kicinski
We get a significant number of conflicts between net and net-next because of selftests Makefile changes. People tend to append new test cases at the end of the Makefile when there's no clear sort order. Sort all networking selftests Makefiles, use the following format: VAR_NAME := \ entry1 \ entry2 \ entry3 \ # end of VAR_NAME Some Makefiles are already pretty close to this. Acked-by: Antonio Quartulli <antonio@openvpn.net> Acked-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Acked-by: Allison Henderson <allison.henderson@oracle.com> Reviewed-by: Petr Machata <petrm@nvidia.com> Link: https://patch.msgid.link/20251003210127.1021918-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-09-23selftests/net: Test tcp port reuse after unbinding a socketJakub Sitnicki
Exercise the scenario described in detail in the cover letter: 1) socket A: connect() from ephemeral port X 2) socket B: explicitly bind() to port X 3) check that port X is now excluded from ephemeral ports 4) close socket B to release the port bind 5) socket C: connect() from ephemeral port X As well as a corner case to test that the connect-bind flag is cleared: 1) connect() from ephemeral port X 2) disconnect the socket with connect(AF_UNSPEC) 3) bind() it explicitly to port X 4) check that port X is now excluded from ephemeral ports Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com> Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Link: https://patch.msgid.link/20250917-update-bind-bucket-state-on-unhash-v5-2-57168b661b47@cloudflare.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-09-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR (net-6.17-rc6). Conflicts: net/netfilter/nft_set_pipapo.c net/netfilter/nft_set_pipapo_avx2.c c4eaca2e1052 ("netfilter: nft_set_pipapo: don't check genbit from packetpath lookups") 84c1da7b38d9 ("netfilter: nft_set_pipapo: use avx2 algorithm for insertions too") Only trivial adjacent changes (in a doc and a Makefile). Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-09-09selftests: net: run groups from fcnal-test in parallelJakub Kicinski
fcnal-test.sh takes almost hour and a half to finish. The tests are already grouped into ipv4, ipv6 and other. Run those groups separately. Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://patch.msgid.link/20250908201021.270681-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-09-09selftests: net: add test for ipv6 fragmentationBrett A C Sheffield
Add selftest for the IPv6 fragmentation regression which affected several stable kernels. Commit a18dfa9925b9 ("ipv6: save dontfrag in cork") was backported to stable without some prerequisite commits. This caused a regression when sending IPv6 UDP packets by preventing fragmentation and instead returning -1 (EMSGSIZE). Add selftest to check for this issue by attempting to send a packet larger than the interface MTU. The packet will be fragmented on a working kernel, with sendmsg(2) correctly returning the expected number of bytes sent. When the regression is present, sendmsg returns -1 and sets errno to EMSGSIZE. Link: https://lore.kernel.org/stable/aElivdUXqd1OqgMY@karahi.gladserv.com Signed-off-by: Brett A C Sheffield <bacs@librecast.net> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250903154925.13481-1-bacs@librecast.net Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-09-09selftests: net: add test for destination in broadcast packetsOscar Maes
Add test to check the broadcast ethernet destination field is set correctly. This test sends a broadcast ping, captures it using tcpdump and ensures that all bits of the 6 octet ethernet destination address are correctly set by examining the output capture file. Co-developed-by: Brett A C Sheffield <bacs@librecast.net> Signed-off-by: Brett A C Sheffield <bacs@librecast.net> Signed-off-by: Oscar Maes <oscmaes92@gmail.com> Link: https://patch.msgid.link/20250902150240.4272-1-oscmaes92@gmail.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-09-08selftests: net: move netlink-dumps back to progsJakub Kicinski
Commit 9bb88c659673 ("selftests: net: test extacks in netlink dumps") moved netlink-dumps from TEST_GEN_PROGS to YNL_GEN_FILES. But _FILES are not for tests, rather for utilities / helpers. Create YNL_GEN_PROGS and include netlink-dumps there. This makes netlink-dumps part of executed tests, again. Link: https://patch.msgid.link/20250906211351.3192412-2-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-09-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR (net-6.17-rc5). No conflicts. Adjacent changes: include/net/sock.h c51613fa276f ("net: add sk->sk_drop_counters") 5d6b58c932ec ("net: lockless sock_i_ino()") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-09-02selftests: net: Add a selftest for VXLAN with FDB nexthop groupsIdo Schimmel
Add test cases for VXLAN with FDB nexthop groups, testing both IPv4 and IPv6. Test basic Tx functionality as well as some corner cases. Example output: # ./test_vxlan_nh.sh TEST: VXLAN FDB nexthop: IPv4 basic Tx [ OK ] TEST: VXLAN FDB nexthop: IPv6 basic Tx [ OK ] TEST: VXLAN FDB nexthop: learning [ OK ] TEST: VXLAN FDB nexthop: IPv4 proxy [ OK ] TEST: VXLAN FDB nexthop: IPv6 proxy [ OK ] Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org> Link: https://patch.msgid.link/20250901065035.159644-4-idosch@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-08-25selftests: net: add test for dst hint mechanism with directed broadcast ↵Oscar Maes
addresses Add a test for ensuring that the dst hint mechanism is used for directed broadcast addresses. This test relies on mausezahn for sending directed broadcast packets. Additionally, a high GRO flush timeout is set to ensure that packets will be received as lists. The test determines if the hint mechanism was used by checking the in_brd statistic using lnstat. Signed-off-by: Oscar Maes <oscmaes92@gmail.com> Link: https://patch.msgid.link/20250819174642.5148-3-oscmaes92@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>