kernel/tools/testing/selftests/net/cmsg_sender.c, branch linux-rolling-stable

selftests: complete kselftest include centralization

2025-11-27T22:24:31Z

This follow-up patch completes centralization of kselftest.h and ksefltest_harness.h includes in remaining seltests files, replacing all relative paths with a non-relative paths using shared -I include path in lib.mk Tested with gcc-13.3 and clang-18.1, and cross-compiled successfully on riscv, arm64, x86_64 and powerpc arch. [reddybalavignesh9979@gmail.com: add selftests include path for kselftest.h] Link: https://lkml.kernel.org/r/20251017090201.317521-1-reddybalavignesh9979@gmail.com Link: https://lkml.kernel.org/r/20251016104409.68985-1-reddybalavignesh9979@gmail.com Signed-off-by: Bala-Vignesh-Reddy Suggested-by: Andrew Morton Link: https://lore.kernel.org/lkml/20250820143954.33d95635e504e94df01930d0@linux-foundation.org/ Reviewed-by: Wei Yang Cc: David Hildenbrand Cc: David S. Miller Cc: Eric Dumazet Cc: Günther Noack Cc: Jakub Kacinski Cc: Liam Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Mickael Salaun Cc: Ming Lei Cc: Paolo Abeni Cc: Shuah Khan Cc: Simon Horman Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton

selftests: net: avoid memory leak

2025-09-02T23:55:00Z

The buffer be used without free,fix it to avoid memory leak. Signed-off-by: Zongmin Zhou Reviewed-by: Simon Horman Link: https://patch.msgid.link/20250901054557.32811-1-min_halo@163.com Signed-off-by: Jakub Kicinski

selftests/net: expand cmsg_ip with MSG_MORE

2025-03-10T20:13:04Z

UDP send with MSG_MORE takes a slightly different path than the lockless fast path. For completeness, add coverage to this case too. Pass MSG_MORE on the initial sendmsg, then follow up with a zero byte write to unplug the cork. Unrelated: also add two missing endlines in usage(). Signed-off-by: Willem de Bruijn Reviewed-by: Eric Dumazet Link: https://patch.msgid.link/20250307033620.411611-4-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski

selftests/net: expand cmsg_ipv6.sh with ipv4

2025-02-27T02:59:00Z

Expand IPV6_TCLASS to also cover IP_TOS. Expand IPV6_HOPLIMIT to also cover IP_TTL. Expand csmg_sender.c to allow setting IPv4 setsockopts. Also rename struct v6 to cmsg to match its expanded scope. Don't bother updating all occurrences of tclass and hoplimit. Rename cmsg_ipv6.sh to cmsg_ip.sh to match the expanded scope. Be careful around the subtle API difference between TCLASS and TOS. IP_TOS includes ECN bits. Add a test to verify that these are masked when making routing decisions. Diff is more concise with --word-diff Signed-off-by: Willem de Bruijn Link: https://patch.msgid.link/20250225022431.2083926-3-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski

selftests: net: test SO_PRIORITY ancillary data with cmsg_sender

2024-12-17T02:14:12Z

Extend cmsg_sender.c with a new option '-Q' to send SO_PRIORITY ancillary data. cmsg_so_priority.sh script added to validate SO_PRIORITY behavior by creating VLAN device with egress QoS mapping and testing packet priorities using flower filters. Verify that packets with different priorities are correctly matched and counted by filters for multiple protocols and IP versions. Reviewed-by: Willem de Bruijn Acked-by: Willem de Bruijn Reviewed-by: Ido Schimmel Tested-by: Ido Schimmel Suggested-by: Ido Schimmel Signed-off-by: Anna Emese Nyiri Link: https://patch.msgid.link/20241213084457.45120-4-annaemesenyiri@gmail.com Signed-off-by: Jakub Kicinski

selftests: net: increase the delay for relative cmsg_time.sh test

2024-05-11T01:22:10Z

Slow machines can delay scheduling of the packets for milliseconds. Increase the delay to 8ms if KSFT_MACHINE_SLOW. Try to limit the variability by moving setsockopts earlier (before we read time). This fixes the "TXTIME rel" failures on debug kernels, like: Case ICMPv4 - TXTIME rel returned '', expected 'OK' Reviewed-by: Willem de Bruijn Link: https://lore.kernel.org/r/20240510005705.43069-2-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: fix timestamp not arriving in cmsg_time.sh

2024-05-11T01:22:00Z

On slow machines the SND timestamp sometimes doesn't arrive before we quit. The test only waits as long as the packet delay, so it's easy for a race condition to happen. Double the wait but do a bit of polling, once the SND timestamp arrives there's no point to wait any longer. This fixes the "TXTIME abs" failures on debug kernels, like: Case ICMPv4 - TXTIME abs returned '', expected 'OK' Reviewed-by: Willem de Bruijn Link: https://lore.kernel.org/r/20240510005705.43069-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

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

2023-12-01T00:11:19Z

Cross-merge networking fixes after downstream PR. No conflicts. Signed-off-by: Jakub Kicinski

selftests/net: fix a char signedness issue

2023-11-28T02:12:07Z

Signedness of char is signed on x86_64, but unsigned on arm64. Fix the warning building cmsg_sender.c on signed platforms or forced with -fsigned-char: msg_sender.c:455:12: error: implicit conversion from 'int' to 'char' changes value from 128 to -128 [-Werror,-Wconstant-conversion] buf[0] = ICMPV6_ECHO_REQUEST; constant ICMPV6_ECHO_REQUEST is 128. Link: https://lwn.net/Articles/911914 Fixes: de17e305a810 ("selftests: net: cmsg_sender: support icmp and raw sockets") Signed-off-by: Willem de Bruijn Link: https://lore.kernel.org/r/20231124171645.1011043-3-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski

selftests: net: verify fq per-band packet limit

2023-11-21T01:48:36Z

Commit 29f834aa326e ("net_sched: sch_fq: add 3 bands and WRR scheduling") introduces multiple traffic bands, and per-band maximum packet count. Per-band limits ensures that packets in one class cannot fill the entire qdisc and so cause DoS to the traffic in the other classes. Verify this behavior: 1. set the limit to 10 per band 2. send 20 pkts on band A: verify that 10 are queued, 10 dropped 3. send 20 pkts on band A: verify that 0 are queued, 20 dropped 4. send 20 pkts on band B: verify that 10 are queued, 10 dropped Packets must remain queued for a period to trigger this behavior. Use SO_TXTIME to store packets for 100 msec. The test reuses existing upstream test infra. The script is a fork of cmsg_time.sh. The scripts call cmsg_sender. The test extends cmsg_sender with two arguments: * '-P' SO_PRIORITY There is a subtle difference between IPv4 and IPv6 stack behavior: PF_INET/IP_TOS sets IP header bits and sk_priority PF_INET6/IPV6_TCLASS sets IP header bits BUT NOT sk_priority * '-n' num pkts Send multiple packets in quick succession. I first attempted a for loop in the script, but this is too slow in virtualized environments, causing flakiness as the 100ms timeout is reached and packets are dequeued. Also do not wait for timestamps to be queued unless timestamps are requested. Signed-off-by: Willem de Bruijn Reviewed-by: Simon Horman Reviewed-by: Eric Dumazet Link: https://lore.kernel.org/r/20231116203449.2627525-1-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski