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6 daysMerge tag 'net-next-6.19' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core & protocols: - Replace busylock at the Tx queuing layer with a lockless list. Resulting in a 300% (4x) improvement on heavy TX workloads, sending twice the number of packets per second, for half the cpu cycles. - Allow constantly busy flows to migrate to a more suitable CPU/NIC queue. Normally we perform queue re-selection when flow comes out of idle, but under extreme circumstances the flows may be constantly busy. Add sysctl to allow periodic rehashing even if it'd risk packet reordering. - Optimize the NAPI skb cache, make it larger, use it in more paths. - Attempt returning Tx skbs to the originating CPU (like we already did for Rx skbs). - Various data structure layout and prefetch optimizations from Eric. - Remove ktime_get() from the recvmsg() fast path, ktime_get() is sadly quite expensive on recent AMD machines. - Extend threaded NAPI polling to allow the kthread busy poll for packets. - Make MPTCP use Rx backlog processing. This lowers the lock pressure, improving the Rx performance. - Support memcg accounting of MPTCP socket memory. - Allow admin to opt sockets out of global protocol memory accounting (using a sysctl or BPF-based policy). The global limits are a poor fit for modern container workloads, where limits are imposed using cgroups. - Improve heuristics for when to kick off AF_UNIX garbage collection. - Allow users to control TCP SACK compression, and default to 33% of RTT. - Add tcp_rcvbuf_low_rtt sysctl to let datacenter users avoid unnecessarily aggressive rcvbuf growth and overshot when the connection RTT is low. - Preserve skb metadata space across skb_push / skb_pull operations. - Support for IPIP encapsulation in the nftables flowtable offload. - Support appending IP interface information to ICMP messages (RFC 5837). - Support setting max record size in TLS (RFC 8449). - Remove taking rtnl_lock from RTM_GETNEIGHTBL and RTM_SETNEIGHTBL. - Use a dedicated lock (and RCU) in MPLS, instead of rtnl_lock. - Let users configure the number of write buffers in SMC. - Add new struct sockaddr_unsized for sockaddr of unknown length, from Kees. - Some conversions away from the crypto_ahash API, from Eric Biggers. - Some preparations for slimming down struct page. - YAML Netlink protocol spec for WireGuard. - Add a tool on top of YAML Netlink specs/lib for reporting commonly computed derived statistics and summarized system state. Driver API: - Add CAN XL support to the CAN Netlink interface. - Add uAPI for reporting PHY Mean Square Error (MSE) diagnostics, as defined by the OPEN Alliance's "Advanced diagnostic features for 100BASE-T1 automotive Ethernet PHYs" specification. - Add DPLL phase-adjust-gran pin attribute (and implement it in zl3073x). - Refactor xfrm_input lock to reduce contention when NIC offloads IPsec and performs RSS. - Add info to devlink params whether the current setting is the default or a user override. Allow resetting back to default. - Add standard device stats for PSP crypto offload. - Leverage DSA frame broadcast to implement simple HSR frame duplication for a lot of switches without dedicated HSR offload. - Add uAPI defines for 1.6Tbps link modes. Device drivers: - Add Motorcomm YT921x gigabit Ethernet switch support. - Add MUCSE driver for N500/N210 1GbE NIC series. - Convert drivers to support dedicated ops for timestamping control, and away from the direct IOCTL handling. While at it support GET operations for PHY timestamping. - Add (and convert most drivers to) a dedicated ethtool callback for reading the Rx ring count. - Significant refactoring efforts in the STMMAC driver, which supports Synopsys turn-key MAC IP integrated into a ton of SoCs. - Ethernet high-speed NICs: - Broadcom (bnxt): - support PPS in/out on all pins - Intel (100G, ice, idpf): - ice: implement standard ethtool and timestamping stats - i40e: support setting the max number of MAC addresses per VF - iavf: support RSS of GTP tunnels for 5G and LTE deployments - nVidia/Mellanox (mlx5): - reduce downtime on interface reconfiguration - disable being an XDP redirect target by default (same as other drivers) to avoid wasting resources if feature is unused - Meta (fbnic): - add support for Linux-managed PCS on 25G, 50G, and 100G links - Wangxun: - support Rx descriptor merge, and Tx head writeback - support Rx coalescing offload - support 25G SPF and 40G QSFP modules - Ethernet virtual: - Google (gve): - allow ethtool to configure rx_buf_len - implement XDP HW RX Timestamping support for DQ descriptor format - Microsoft vNIC (mana): - support HW link state events - handle hardware recovery events when probing the device - Ethernet NICs consumer, and embedded: - usbnet: add support for Byte Queue Limits (BQL) - AMD (amd-xgbe): - add device selftests - NXP (enetc): - add i.MX94 support - Broadcom integrated MACs (bcmgenet, bcmasp): - bcmasp: add support for PHY-based Wake-on-LAN - Broadcom switches (b53): - support port isolation - support BCM5389/97/98 and BCM63XX ARL formats - Lantiq/MaxLinear switches: - support bridge FDB entries on the CPU port - use regmap for register access - allow user to enable/disable learning - support Energy Efficient Ethernet - support configuring RMII clock delays - add tagging driver for MaxLinear GSW1xx switches - Synopsys (stmmac): - support using the HW clock in free running mode - add Eswin EIC7700 support - add Rockchip RK3506 support - add Altera Agilex5 support - Cadence (macb): - cleanup and consolidate descriptor and DMA address handling - add EyeQ5 support - TI: - icssg-prueth: support AF_XDP - Airoha access points: - add missing Ethernet stats and link state callback - add AN7583 support - support out-of-order Tx completion processing - Power over Ethernet: - pd692x0: preserve PSE configuration across reboots - add support for TPS23881B devices - Ethernet PHYs: - Open Alliance OATC14 10BASE-T1S PHY cable diagnostic support - Support 50G SerDes and 100G interfaces in Linux-managed PHYs - micrel: - support for non PTP SKUs of lan8814 - enable in-band auto-negotiation on lan8814 - realtek: - cable testing support on RTL8224 - interrupt support on RTL8221B - motorcomm: support for PHY LEDs on YT853 - microchip: support for LAN867X Rev.D0 PHYs w/ SQI and cable diag - mscc: support for PHY LED control - CAN drivers: - m_can: add support for optional reset and system wake up - remove can_change_mtu() obsoleted by core handling - mcp251xfd: support GPIO controller functionality - Bluetooth: - add initial support for PASTa - WiFi: - split ieee80211.h file, it's way too big - improvements in VHT radiotap reporting, S1G, Channel Switch Announcement handling, rate tracking in mesh networks - improve multi-radio monitor mode support, and add a cfg80211 debugfs interface for it - HT action frame handling on 6 GHz - initial chanctx work towards NAN - MU-MIMO sniffer improvements - WiFi drivers: - RealTek (rtw89): - support USB devices RTL8852AU and RTL8852CU - initial work for RTL8922DE - improved injection support - Intel: - iwlwifi: new sniffer API support - MediaTek (mt76): - WED support for >32-bit DMA - airoha NPU support - regdomain improvements - continued WiFi7/MLO work - Qualcomm/Atheros: - ath10k: factory test support - ath11k: TX power insertion support - ath12k: BSS color change support - ath12k: statistics improvements - brcmfmac: Acer A1 840 tablet quirk - rtl8xxxu: 40 MHz connection fixes/support" * tag 'net-next-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1381 commits) net: page_pool: sanitise allocation order net: page pool: xa init with destroy on pp init net/mlx5e: Support XDP target xmit with dummy program net/mlx5e: Update XDP features in switch channels selftests/tc-testing: Test CAKE scheduler when enqueue drops packets net/sched: sch_cake: Fix incorrect qlen reduction in cake_drop wireguard: netlink: generate netlink code wireguard: uapi: generate header with ynl-gen wireguard: uapi: move flag enums wireguard: uapi: move enum wg_cmd wireguard: netlink: add YNL specification selftests: drv-net: Fix tolerance calculation in devlink_rate_tc_bw.py selftests: drv-net: Fix and clarify TC bandwidth split in devlink_rate_tc_bw.py selftests: drv-net: Set shell=True for sysfs writes in devlink_rate_tc_bw.py selftests: drv-net: Use Iperf3Runner in devlink_rate_tc_bw.py selftests: drv-net: introduce Iperf3Runner for measurement use cases selftests: drv-net: Add devlink_rate_tc_bw.py to TEST_PROGS net: ps3_gelic_net: Use napi_alloc_skb() and napi_gro_receive() Documentation: net: dsa: mention simple HSR offload helpers Documentation: net: dsa: mention availability of RedBox ...
11 daysselftests/bpf: do not hardcode target rate in test_tc_edt BPF programAlexis Lothoré (eBPF Foundation)
test_tc_edt currently defines the target rate in both the userspace and BPF parts. This value could be defined once in the userspace part if we make it able to configure the BPF program before starting the test. Add a target_rate variable in the BPF part, and make the userspace part set it to the desired rate before attaching the shaping program. Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com> Link: https://lore.kernel.org/r/20251128-tc_edt-v2-4-26db48373e73@bootlin.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
11 daysselftests/bpf: integrate test_tc_edt into test_progsAlexis Lothoré (eBPF Foundation)
test_tc_edt.sh uses a pair of veth and a BPF program attached to the TX veth to shape the traffic to 5MBps. It then checks that the amount of received bytes (at interface level), compared to the TX duration, indeed matches 5Mbps. Convert this test script to the test_progs framework: - keep the double veth setup, isolated in two veths - run a small tcp server, and connect client to server - push a pre-configured amount of bytes, and measure how much time has been needed to push those - ensure that this rate is in a 2% error margin around the target rate This two percent value, while being tight, is hopefully large enough to not make the test too flaky in CI, while also turning it into a small example of BPF-based shaping. Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com> Link: https://lore.kernel.org/r/20251128-tc_edt-v2-2-26db48373e73@bootlin.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
11 daysselftests/bpf: Remove usage of lsm/file_alloc_security in selftestAmery Hung
file_alloc_security hook is disabled. Use other LSM hooks in selftests instead. Signed-off-by: Amery Hung <ameryhung@gmail.com> Link: https://lore.kernel.org/r/20251126202927.2584874-2-ameryhung@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-24selftests/bpf: Fix htab_update/reenter_update selftest failureSaket Kumar Bhaskar
Since commit 31158ad02ddb ("rqspinlock: Add deadlock detection and recovery") the updated path on re-entrancy now reports deadlock via -EDEADLK instead of the previous -EBUSY. Also, the way reentrancy was exercised (via fentry/lookup_elem_raw) has been fragile because lookup_elem_raw may be inlined (find_kernel_btf_id() will return -ESRCH). To fix this fentry is attached to bpf_obj_free_fields() instead of lookup_elem_raw() and: - The htab map is made to use a BTF-described struct val with a struct bpf_timer so that check_and_free_fields() reliably calls bpf_obj_free_fields() on element replacement. - The selftest is updated to do two updates to the same key (insert + replace) in prog_test. - The selftest is updated to align with expected errno with the kernel’s current behavior. Signed-off-by: Saket Kumar Bhaskar <skb99@linux.ibm.com> Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com> Link: https://lore.kernel.org/r/20251117060752.129648-1-skb99@linux.ibm.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-21selftests: bpf: Add tests for unbalanced rcu_read_lockPuranjay Mohan
As verifier now supports nested rcu critical sections, add new test cases to make sure unbalanced usage of rcu_read_lock()/unlock() is rejected. Signed-off-by: Puranjay Mohan <puranjay@kernel.org> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20251117200411.25563-3-puranjay@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-21bpf: support nested rcu critical sectionsPuranjay Mohan
Currently, nested rcu critical sections are rejected by the verifier and rcu_lock state is managed by a boolean variable. Add support for nested rcu critical sections by make active_rcu_locks a counter similar to active_preempt_locks. bpf_rcu_read_lock() increments this counter and bpf_rcu_read_unlock() decrements it, MEM_RCU -> PTR_UNTRUSTED transition happens when active_rcu_locks drops to 0. Signed-off-by: Puranjay Mohan <puranjay@kernel.org> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20251117200411.25563-2-puranjay@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-21selftests/bpf: Improve reliability of test_perf_branches_no_hw()Matt Bobrowski
Currently, test_perf_branches_no_hw() relies on the busy loop within test_perf_branches_common() being slow enough to allow at least one perf event sample tick to occur before starting to tear down the backing perf event BPF program. With a relatively small fixed iteration count of 1,000,000, this is not guaranteed on modern fast CPUs, resulting in the test run to subsequently fail with the following: bpf_testmod.ko is already unloaded. Loading bpf_testmod.ko... Successfully loaded bpf_testmod.ko. test_perf_branches_common:PASS:test_perf_branches_load 0 nsec test_perf_branches_common:PASS:attach_perf_event 0 nsec test_perf_branches_common:PASS:set_affinity 0 nsec check_good_sample:PASS:output not valid 0 nsec check_good_sample:PASS:read_branches_size 0 nsec check_good_sample:PASS:read_branches_stack 0 nsec check_good_sample:PASS:read_branches_stack 0 nsec check_good_sample:PASS:read_branches_global 0 nsec check_good_sample:PASS:read_branches_global 0 nsec check_good_sample:PASS:read_branches_size 0 nsec test_perf_branches_no_hw:PASS:perf_event_open 0 nsec test_perf_branches_common:PASS:test_perf_branches_load 0 nsec test_perf_branches_common:PASS:attach_perf_event 0 nsec test_perf_branches_common:PASS:set_affinity 0 nsec check_bad_sample:FAIL:output not valid no valid sample from prog Summary: 0/1 PASSED, 0 SKIPPED, 1 FAILED Successfully unloaded bpf_testmod.ko. On a modern CPU (i.e. one with a 3.5 GHz clock rate), executing 1 million increments of a volatile integer can take significantly less than 1 millisecond. If the spin loop and detachment of the perf event BPF program elapses before the first 1 ms sampling interval elapses, the perf event will never end up firing. Fix this by bumping the loop iteration counter a little within test_perf_branches_common(), along with ensuring adding another loop termination condition which is directly influenced by the backing perf event BPF program executing. Notably, a concious decision was made to not adjust the sample_freq value as that is just not a reliable way to go about fixing the problem. It effectively still leaves the race window open. Fixes: 67306f84ca78c ("selftests/bpf: Add bpf_read_branch_records() selftest") Signed-off-by: Matt Bobrowski <mattbobrowski@google.com> Reviewed-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/r/20251119143540.2911424-1-mattbobrowski@google.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-21selftests/bpf: skip test_perf_branches_hw() on unsupported platformsMatt Bobrowski
Gracefully skip the test_perf_branches_hw subtest on platforms that do not support LBR or require specialized perf event attributes to enable branch sampling. For example, AMD's Milan (Zen 3) supports BRS rather than traditional LBR. This requires specific configurations (attr.type = PERF_TYPE_RAW, attr.config = RETIRED_TAKEN_BRANCH_INSTRUCTIONS) that differ from the generic setup used within this test. Notably, it also probably doesn't hold much value to special case perf event configurations for selected micro architectures. Fixes: 67306f84ca78c ("selftests/bpf: Add bpf_read_branch_records() selftest") Signed-off-by: Matt Bobrowski <mattbobrowski@google.com> Acked-by: Song Liu <song@kernel.org> Link: https://lore.kernel.org/r/20251120142059.2836181-1-mattbobrowski@google.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-21selftests/bpf: Use sockaddr_storage instead of sa46 in select_reuseport testHoyeon Lee
The select_reuseport selftest uses a custom sa46 union to represent IPv4 and IPv6 addresses. This custom wrapper requires extra manual handling for address family and field extraction. Replace sa46 with sockaddr_storage and update the helper functions to operate on native socket structures. This simplifies the code and removes unnecessary custom address-handling logic. No functional changes intended. Reviewed-by: Amery Hung <ameryhung@gmail.com> Signed-off-by: Hoyeon Lee <hoyeon.lee@suse.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251121081332.2309838-3-hoyeon.lee@suse.com
2025-11-21selftests/bpf: Use sockaddr_storage directly in cls_redirect testHoyeon Lee
The cls_redirect test uses a custom addr_port/tuple wrapper to represent IPv4/IPv6 addresses and ports. This custom wrapper requires extra conversion logic and specific helpers such as fill_addr_port(), which are no longer necessary when using standard socket address structures. This commit replaces addr_port/tuple with the standard sockaddr_storage so test handles address families and ports using native socket types. It removes the custom helper, eliminates redundant casts, and simplifies the setup helpers without functional changes. set_up_conn() and build_input() now take src/dst sockaddr_storage directly. Reviewed-by: Amery Hung <ameryhung@gmail.com> Signed-off-by: Hoyeon Lee <hoyeon.lee@suse.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251121081332.2309838-2-hoyeon.lee@suse.com
2025-11-20selftests/bpf: Use ASSERT_STRNEQ to factor in long slab cache namesMatt Bobrowski
subtest_kmem_cache_iter_check_slabinfo() fundamentally compares slab cache names parsed out from /proc/slabinfo against those stored within struct kmem_cache_result. The current problem is that the slab cache name within struct kmem_cache_result is stored within a bounded fixed-length array (sized to SLAB_NAME_MAX(32)), whereas the name parsed out from /proc/slabinfo is not. Meaning, using ASSERT_STREQ() can certainly lead to test failures, particularly when dealing with slab cache names that are longer than SLAB_NAME_MAX(32) bytes. Notably, kmem_cache_create() allows callers to create slab caches with somewhat arbitrarily sized names via its __name identifier argument, so exceeding the SLAB_NAME_MAX(32) limit that is in place now can certainly happen. Make subtest_kmem_cache_iter_check_slabinfo() more reliable by only checking up to sizeof(struct kmem_cache_result.name) - 1 using ASSERT_STRNEQ(). Fixes: a496d0cdc84d ("selftests/bpf: Add a test for kmem_cache_iter") Signed-off-by: Matt Bobrowski <mattbobrowski@google.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Acked-by: Song Liu <song@kernel.org> Link: https://patch.msgid.link/20251118073734.4188710-1-mattbobrowski@google.com
2025-11-20Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR (net-6.18-rc7). No conflicts, adjacent changes: tools/testing/selftests/net/af_unix/Makefile e1bb28bf13f4 ("selftest: af_unix: Add test for SO_PEEK_OFF.") 45a1cd8346ca ("selftests: af_unix: Add tests for ECONNRESET and EOF semantics") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-11-14selftests/bpf: Test bpf_skb_check_mtu(BPF_MTU_CHK_SEGS) when ↵Martin KaFai Lau
transport_header is not set Add a test to check that bpf_skb_check_mtu(BPF_MTU_CHK_SEGS) is rejected (-EINVAL) if skb->transport_header is not set. The test needs to lower the MTU of the loopback device. Thus, take this opportunity to run the test in a netns by adding "ns_" to the test name. The "serial_" prefix can then be removed. Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://lore.kernel.org/r/20251112232331.1566074-2-martin.lau@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after 6.18-rc5+Alexei Starovoitov
Cross-merge BPF and other fixes after downstream PR. Minor conflict in kernel/bpf/helpers.c Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-14selftests/bpf: Add BTF dedup tests for recursive typedef definitionsPaul Houssel
Add several ./test_progs tests: 1. btf/dedup:recursive typedef ensures that deduplication no longer fails on recursive typedefs. 2. btf/dedup:typedef ensures that typedefs are deduplicated correctly just as they were before this patch. Signed-off-by: Paul Houssel <paul.houssel@orange.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/bpf/9fac2f744089f6090257d4c881914b79f6cd6c6a.1763037045.git.paul.houssel@orange.com
2025-11-14selftests/bpf: Fix failure paths in send_signal testAlexei Starovoitov
When test_send_signal_kern__open_and_load() fails parent closes the pipe which cases ASSERT_EQ(read(pipe_p2c...)) to fail, but child continues and enters infinite loop, while parent is stuck in wait(NULL). Other error paths have similar issue, so kill the child before waiting on it. The bug was discovered while compiling all of selftests with -O1 instead of -O2 which caused progs/test_send_signal_kern.c to fail to load. Fixes: ab8b7f0cb358 ("tools/bpf: Add self tests for bpf_send_signal_thread()") Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/bpf/20251113171153.2583-1-alexei.starovoitov@gmail.com
2025-11-14selftests/bpf: Convert glob_match() to bpf arenaAlexei Starovoitov
Increase arena test coverage. Convert glob_match() to bpf arena in two steps: 1. Copy paste lib/glob.c into bpf_arena_strsearch.h Copy paste lib/globtests.c into progs/arena_strsearch.c 2. Add __arena to pointers Add __arg_arena to global functions that accept arena pointers Add cond_break to loops The test also serves as a good example of what's possible with bpf arena and how existing algorithms can be converted. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20251111032931.21430-1-alexei.starovoitov@gmail.com
2025-11-13selftests/bpf: Add mptcp test with sockmapJiayuan Chen
Add test cases to verify that when MPTCP falls back to plain TCP sockets, they can properly work with sockmap. Additionally, add test cases to ensure that sockmap correctly rejects MPTCP sockets as expected. Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Acked-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Link: https://patch.msgid.link/20251111060307.194196-4-jiayuan.chen@linux.dev
2025-11-13selftests/bpf: Add test to verify freeing the special fields in pcpu mapsLeon Hwang
Add test to verify that updating [lru_,]percpu_hash maps decrements refcount when BPF_KPTR_REF objects are involved. The tests perform the following steps: . Call update_elem() to insert an initial value. . Use bpf_refcount_acquire() to increment the refcount. . Store the node pointer in the map value. . Add the node to a linked list. . Probe-read the refcount and verify it is *2*. . Call update_elem() again to trigger refcount decrement. . Probe-read the refcount and verify it is *1*. Signed-off-by: Leon Hwang <leon.hwang@linux.dev> Acked-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20251105151407.12723-3-leon.hwang@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-10bpf/selftests: Add selftest for bpf_smc_hs_ctrlD. Wythe
This tests introduces a tiny smc_hs_ctrl for filtering SMC connections based on IP pairs, and also adds a realistic topology model to verify it. Also, we can only use SMC loopback under CI test, so an additional configuration needs to be enabled. Follow the steps below to run this test. make -C tools/testing/selftests/bpf cd tools/testing/selftests/bpf sudo ./test_progs -t smc Results shows: Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: D. Wythe <alibuda@linux.alibaba.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Tested-by: Saket Kumar Bhaskar <skb99@linux.ibm.com> Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev> Link: https://patch.msgid.link/20251107035632.115950-4-alibuda@linux.alibaba.com
2025-11-10selftests/bpf: Cover skb metadata access after bpf_skb_change_protoJakub Sitnicki
Add a test to verify that skb metadata remains accessible after calling bpf_skb_change_proto(), which modifies packet headroom to accommodate different IP header sizes. Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251105-skb-meta-rx-path-v4-16-5ceb08a9b37b@cloudflare.com
2025-11-10selftests/bpf: Cover skb metadata access after change_head/tail helperJakub Sitnicki
Add a test to verify that skb metadata remains accessible after calling bpf_skb_change_head() and bpf_skb_change_tail(), which modify packet headroom/tailroom and can trigger head reallocation. Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251105-skb-meta-rx-path-v4-15-5ceb08a9b37b@cloudflare.com
2025-11-10selftests/bpf: Cover skb metadata access after bpf_skb_adjust_roomJakub Sitnicki
Add a test to verify that skb metadata remains accessible after calling bpf_skb_adjust_room(), which modifies the packet headroom and can trigger head reallocation. The helper expects an Ethernet frame carrying an IP packet so switch test packet identification by source MAC address since we can no longer rely on Ethernet proto being set to zero. Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251105-skb-meta-rx-path-v4-14-5ceb08a9b37b@cloudflare.com
2025-11-10selftests/bpf: Cover skb metadata access after vlan push/pop helperJakub Sitnicki
Add a test to verify that skb metadata remains accessible after calling bpf_skb_vlan_push() and bpf_skb_vlan_pop(), which modify the packet headroom. Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251105-skb-meta-rx-path-v4-13-5ceb08a9b37b@cloudflare.com
2025-11-10selftests/bpf: Expect unclone to preserve skb metadataJakub Sitnicki
Since pskb_expand_head() no longer clears metadata on unclone, update tests for cloned packets to expect metadata to remain intact. Also simplify the clone_dynptr_kept_on_{data,meta}_slice_write tests. Creating an r/w dynptr slice is sufficient to trigger an unclone in the prologue, so remove the extraneous writes to the data/meta slice. Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251105-skb-meta-rx-path-v4-12-5ceb08a9b37b@cloudflare.com
2025-11-10selftests/bpf: Dump skb metadata on verification failureJakub Sitnicki
Add diagnostic output when metadata verification fails to help with troubleshooting test failures. Introduce a check_metadata() helper that prints both expected and received metadata to the BPF program's stderr stream on mismatch. The userspace test reads and dumps this stream on failure. Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251105-skb-meta-rx-path-v4-11-5ceb08a9b37b@cloudflare.com
2025-11-10selftests/bpf: Verify skb metadata in BPF instead of userspaceJakub Sitnicki
Move metadata verification into the BPF TC programs. Previously, userspace read metadata from a map and verified it once at test end. Now TC programs compare metadata directly using __builtin_memcmp() and set a test_pass flag. This enables verification at multiple points during test execution rather than a single final check. Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251105-skb-meta-rx-path-v4-10-5ceb08a9b37b@cloudflare.com
2025-11-06selftests/bpf: Use start_server_str rather than start_reuseport_server in ↵Alexis Lothoré (eBPF Foundation)
tc_tunnel Now that start_server_str enforces SO_REUSEADDR, there's no need to keep using start_reusport_server in tc_tunnel, especially since it only uses one server at a time. Replace start_reuseport_server with start_server_str in tc_tunnel test. Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251105-start-server-soreuseaddr-v1-2-1bbd9c1f8d65@bootlin.com
2025-11-05selftests/bpf: add C-level selftests for indirect jumpsAnton Protopopov
Add C-level selftests for indirect jumps to validate LLVM and libbpf functionality. The tests are intentionally disabled, to be run locally by developers, but will not make the CI red. Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com> Link: https://lore.kernel.org/r/20251105090410.1250500-13-a.s.protopopov@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-05selftests/bpf: add new verifier_gotox testAnton Protopopov
Add a set of tests to validate core gotox functionality without need to rely on compilers. Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com> Link: https://lore.kernel.org/r/20251105090410.1250500-12-a.s.protopopov@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-05selftests/bpf: test instructions arrays with blindingAnton Protopopov
Add a specific test for instructions arrays with blinding enabled. Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20251105090410.1250500-7-a.s.protopopov@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-05selftests/bpf: add selftests for new insn_array mapAnton Protopopov
Add the following selftests for new insn_array map: * Incorrect instruction indexes are rejected * Two programs can't use the same map * BPF progs can't operate the map * no changes to code => map is the same * expected changes when instructions are added * expected changes when instructions are deleted * expected changes when multiple functions are present Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20251105090410.1250500-5-a.s.protopopov@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-05selftests/bpf: Add stacktrace ips test for raw_tpJiri Olsa
Adding test that verifies we get expected initial 2 entries from stacktrace for rawtp probe via ORC unwind. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/r/20251104215405.168643-5-jolsa@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2025-11-05selftests/bpf: Add stacktrace ips test for kprobe_multi/kretprobe_multiJiri Olsa
Adding test that attaches kprobe/kretprobe multi and verifies the ORC stacktrace matches expected functions. Adding bpf_testmod_stacktrace_test function to bpf_testmod kernel module which is called through several functions so we get reliable call path for stacktrace. The test is only for ORC unwinder to keep it simple. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/r/20251104215405.168643-4-jolsa@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2025-11-04selftests/bpf: Test parsing of (multi-)split BTFAlan Maguire
Write raw BTF to files, parse it and compare to original; this allows us to test parsing of (multi-)split BTF code. Signed-off-by: Alan Maguire <alan.maguire@oracle.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20251104203309.318429-3-alan.maguire@oracle.com
2025-11-03selftests/bpf: Add tests for livepatch + bpf trampolineSong Liu
Both livepatch and BPF trampoline use ftrace. Special attention is needed when livepatch and fexit program touch the same function at the same time, because livepatch updates a kernel function and the BPF trampoline need to call into the right version of the kernel function. Use samples/livepatch/livepatch-sample.ko for the test. The test covers two cases: 1) When a fentry program is loaded first. This exercises the modify_ftrace_direct code path. 2) When a fentry program is loaded first. This exercises the register_ftrace_direct code path. Signed-off-by: Song Liu <song@kernel.org> Reviewed-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/r/20251027175023.1521602-4-song@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2025-10-31selftests/bpf: Add checks in tc_tunnel when entering net namespacesAlexis Lothoré (eBPF Foundation)
test_tc_tunnel is missing checks on any open_netns. Add those checks anytime we try to enter a net namespace, and skip the related operations if we fail. While at it, reduce the number of open_netns/close_netns for cases involving operations in two distinct namespaces: the test currently does the following: nstoken = open_netns("foo") do_operation(); close(nstoken); nstoken = open_netns("bar") do_another_operation(); close(nstoken); As already stated in reviews for the initial test, we don't need to go back to the root net namespace to enter a second namespace, so just do: ntoken_client = open_netns("foo") do_operation(); nstoken_server = open_netns("bar") do_another_operation(); close(nstoken_server); close(nstoken_client); Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251031-tc_tunnel_improv-v1-2-0ffe44d27eda@bootlin.com
2025-10-31selftests/bpf: Skip tc_tunnel subtest if its setup failsAlexis Lothoré (eBPF Foundation)
A subtest setup can fail in a wide variety of ways, so make sure not to run it if an issue occurs during its setup. The return value is already representing whether the setup succeeds or fails, it is just about wiring it. Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251031-tc_tunnel_improv-v1-1-0ffe44d27eda@bootlin.com
2025-10-31selftests/bpf: test_xsk: Integrate test_xsk.c to test_progs frameworkBastien Curutchet (eBPF Foundation)
test_xsk.c isn't part of the test_progs framework. Integrate the tests defined by test_xsk.c into the test_progs framework through a new file : prog_tests/xsk.c. ZeroCopy mode isn't tested in it as veth peers don't support it. Move test_xsk{.c/.h} to prog_tests/. Add the find_bit library to test_progs sources in the Makefile as it is is used by test_xsk.c Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@bootlin.com> Link: https://lore.kernel.org/r/20251031-xsk-v7-15-39fe486593a3@bootlin.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-10-29selftests/bpf: Add ABBCCA case for rqspinlock stress testKumar Kartikeya Dwivedi
Introduce a new mode for the rqspinlock stress test that exercises a deadlock that won't be detected by the AA and ABBA checks, such that we always reliably trigger the timeout fallback. We need 4 CPUs for this particular case, as CPU 0 is untouched, and three participant CPUs for triggering the ABBCCA case. Refactor the lock acquisition paths in the module to better reflect the three modes and choose the right lock depending on the context. Also drop ABBA case from running by default as part of test progs, since the stress test can consume a significant amount of time. Acked-by: Eduard Zingerman <eddyz87@gmail.com> Reviewed-by: Amery Hung <ameryhung@gmail.com> Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Link: https://lore.kernel.org/r/20251029181828.231529-3-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-10-29selftests/bpf: Fix intermittent failures in file_reader testMykyta Yatsenko
file_reader/on_open_expect_fault intermittently fails when test_progs runs tests in parallel, because it expects a page fault on first read. Another file_reader test running concurrently may have already pulled the same pages into the page cache, eliminating the fault and causing a spurious failure. Make file_reader/on_open_expect_fault read from a file region that does not overlap with other file_reader tests, so the initial access still faults even under parallel execution. Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com> Acked-by: Ihor Solodrai <ihor.solodrai@linux.dev> Link: https://lore.kernel.org/r/20251029195907.858217-1-mykyta.yatsenko5@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-10-29selftests/bpf: Integrate test_tc_tunnel.sh tests into test_progsAlexis Lothoré (eBPF Foundation)
The test_tc_tunnel.sh script checks that a large variety of tunneling mechanisms handled by the kernel can be handled as well by eBPF programs. While this test shares similarities with test_tunnel.c (which is already integrated in test_progs), those are testing slightly different things: - test_tunnel.c creates a tunnel interface, and then get and set tunnel keys in packet metadata, from BPF programs. - test_tc_tunnels.sh manually parses/crafts packets content Bring the tests covered by test_tc_tunnel.sh into the test_progs framework, by creating a dedicated test_tc_tunnel.sh. This new test defines a "generic" runner which, for each test configuration: - will configure the relevant veth pair, each of those isolated in a dedicated namespace - will check that traffic will fail if there is only an encapsulating program attached to one veth egress - will check that traffic succeed if we enable some decapsulation module on kernel side - will check that traffic still succeeds if we replace the kernel decapsulation with some eBPF ingress decapsulation. Example of the new test execution: # ./test_progs -a tc_tunnel #447/1 tc_tunnel/ipip_none:OK #447/2 tc_tunnel/ipip6_none:OK #447/3 tc_tunnel/ip6tnl_none:OK #447/4 tc_tunnel/sit_none:OK #447/5 tc_tunnel/vxlan_eth:OK #447/6 tc_tunnel/ip6vxlan_eth:OK #447/7 tc_tunnel/gre_none:OK #447/8 tc_tunnel/gre_eth:OK #447/9 tc_tunnel/gre_mpls:OK #447/10 tc_tunnel/ip6gre_none:OK #447/11 tc_tunnel/ip6gre_eth:OK #447/12 tc_tunnel/ip6gre_mpls:OK #447/13 tc_tunnel/udp_none:OK #447/14 tc_tunnel/udp_eth:OK #447/15 tc_tunnel/udp_mpls:OK #447/16 tc_tunnel/ip6udp_none:OK #447/17 tc_tunnel/ip6udp_eth:OK #447/18 tc_tunnel/ip6udp_mpls:OK #447 tc_tunnel:OK Summary: 1/18 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251027-tc_tunnel-v3-3-505c12019f9d@bootlin.com
2025-10-29selftests/bpf: Add tc helpersAlexis Lothoré (eBPF Foundation)
The test_tunnel.c file defines small fonctions to easily attach eBPF programs to tc hooks, either on egress, ingress or both. Create a shared helper in network_helpers.c so that other tests can benefit from it. Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://patch.msgid.link/20251027-tc_tunnel-v3-1-505c12019f9d@bootlin.com
2025-10-27selftests/bpf: Add overwrite mode test for BPF ring bufferXu Kuohai
Add overwrite mode test for BPF ring buffer. The test creates a BPF ring buffer in overwrite mode, then repeatedly reserves and commits records to check if the ring buffer works as expected both before and after overwriting occurs. Signed-off-by: Xu Kuohai <xukuohai@huawei.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20251018035738.4039621-3-xukuohai@huaweicloud.com
2025-10-27selftests/bpf: add file dynptr testsMykyta Yatsenko
Introducing selftests for validating file-backed dynptr works as expected. * validate implementation supports dynptr slice and read operations * validate destructors should be paired with initializers * validate sleepable progs can page in. Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com> Reviewed-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20251026203853.135105-11-mykyta.yatsenko5@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-10-23Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR (net-6.18-rc3). No conflicts or adjacent changes. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-18Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf at 6.18-rc2Alexei Starovoitov
Cross-merge BPF and other fixes after downstream PR. No conflicts. Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-10-16selftests/bpf: Add test for sk->sk_bypass_prot_mem.Kuniyuki Iwashima
The test does the following for IPv4/IPv6 x TCP/UDP sockets with/without sk->sk_bypass_prot_mem, which can be turned on by net.core.bypass_prot_mem or bpf_setsockopt(SK_BPF_BYPASS_PROT_MEM). 1. Create socket pairs 2. Send NR_PAGES (32) of data (TCP consumes around 35 pages, and UDP consuems 66 pages due to skb overhead) 3. Read memory_allocated from sk->sk_prot->memory_allocated and sk->sk_prot->memory_per_cpu_fw_alloc 4. Check if unread data is charged to memory_allocated If sk->sk_bypass_prot_mem is set, memory_allocated should not be changed, but we allow a small error (up to 10 pages) in case other processes on the host use some amounts of TCP/UDP memory. The amount of allocated pages are buffered to per-cpu variable {tcp,udp}_memory_per_cpu_fw_alloc up to +/- net.core.mem_pcpu_rsv before reported to {tcp,udp}_memory_allocated. At 3., memory_allocated is calculated from the 2 variables at fentry of socket create function. We drain the receive queue only for UDP before close() because UDP recv queue is destroyed after RCU grace period. When I printed memory_allocated, UDP bypass cases sometimes saw the no-bypass case's leftover, but it's still in the small error range (<10 pages). bpf_trace_printk: memory_allocated: 0 <-- TCP no-bypass bpf_trace_printk: memory_allocated: 35 bpf_trace_printk: memory_allocated: 0 <-- TCP w/ sysctl bpf_trace_printk: memory_allocated: 0 bpf_trace_printk: memory_allocated: 0 <-- TCP w/ bpf bpf_trace_printk: memory_allocated: 0 bpf_trace_printk: memory_allocated: 0 <-- UDP no-bypass bpf_trace_printk: memory_allocated: 66 bpf_trace_printk: memory_allocated: 2 <-- UDP w/ sysctl (2 pages leftover) bpf_trace_printk: memory_allocated: 2 bpf_trace_printk: memory_allocated: 2 <-- UDP w/ bpf (2 pages leftover) bpf_trace_printk: memory_allocated: 2 We prefer finishing tests faster than oversleeping for call_rcu() + sk_destruct(). The test completes within 2s on QEMU (64 CPUs) w/ KVM. # time ./test_progs -t sk_bypass #371/1 sk_bypass_prot_mem/TCP :OK #371/2 sk_bypass_prot_mem/UDP :OK #371/3 sk_bypass_prot_mem/TCPv6:OK #371/4 sk_bypass_prot_mem/UDPv6:OK #371 sk_bypass_prot_mem:OK Summary: 1/4 PASSED, 0 SKIPPED, 0 FAILED real 0m1.481s user 0m0.181s sys 0m0.441s Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Acked-by: Roman Gushchin <roman.gushchin@linux.dev> Link: https://patch.msgid.link/20251014235604.3057003-7-kuniyu@google.com
2025-10-16selftests: arg_parsing: Ensure data is flushed to disk before reading.Xing Guo
test_parse_test_list_file writes some data to /tmp/bpf_arg_parsing_test.XXXXXX and parse_test_list_file() will read the data back. However, after writing data to that file, we forget to call fsync() and it's causing testing failure in my laptop. This patch helps fix it by adding the missing fsync() call. Fixes: 64276f01dce8 ("selftests/bpf: Test_progs can read test lists from file") Signed-off-by: Xing Guo <higuoxing@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20251016035330.3217145-1-higuoxing@gmail.com
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-10 10:36:26 +0000