v0.7.0: Honeygopher Edition

The cilium/ebpf project now has a mascot, the Honeygopher! Thank you, Vadim Shchekoldin!

New Packages

• Package ringbuf allows reading from a BPF_MAP_TYPE_RINGBUF map.
• Package features implements the equivalent of bpftool feature probe for discovering BPF-related kernel features using native Go. Note that support for probing availability of BPF helpers is pending.
• Package rlimit provides a convenient API to lift the RLIMIT_MEMLOCK constraint on kernels before 5.11.

Breaking Changes

• Deprecations
  • StructOpts has been changed to alias the new StructOpsMap and will be removed in 0.8.0
    by @ti-mo in #381
  • perf.IsClosed() has been deprecated and will be removed in 0.8.0
    by @lmb in #397
  • Collection.Assign() has been removed after a sunset period
    by @ti-mo in #371

Features

• elf: support cgroup getsockname/getpeername prog by @zf1575192187 in #350
• MapType probe API by @rgo3 in #321
• link/uprobe: support filtering by pid by @mmat11 in #342
• Add support for freplace programs by @zeffron in #288
• Export CollectionSpec.ByteOrder by @ti-mo in #361
• Support ELF map definitions larger than bpf_map_def by @ti-mo in #362
• Auto-populate tail-call and map-in-map maps from ELF/BTF by @ti-mo in #363
• features: add HaveProgType API by @rgo3 in #355
• feature: add call fixups for bpf_probe_read_kernel, etc by @xh4n3 in #367
• cmd/bpf2go: use Go 1.16 embed to include BPF elfs by @lmb in #327
• bpf2go: add support for bpf_tracing.h by @lmb in #369
• features: support get map ids from program. by @arikachen in #391
• Recognize sk_reuseport programs by @lmb in #393
• btf: handle float relocation for CO-RE by @lmb in #403
• Utility function to remove memlock rlimit by @folbricht in #392
• BPF ring buffer by @mythi in #318

Bug Fixes

• link/uprobe: handle ENOTSUPP from the kernel's prepare_uprobe() by @ti-mo in #351
• Mark PerCPUCGroupStorage as per-cpu by @yadutaf in #341
• link/kprobe: don't redeclare a new variable sp by @guodongzz in #365
• Fix invalid usage of reflect.SliceHeader by @cuonglm in #376
• program: don't retrieve map ids by default by @lmb in #395
• link/uprobe: fix offsets for statically linked binaries by @mmat11 in #385
• Add sync.Pool to reduce allocations for the default case in unmarshalBytes() by @rockdaboot in #420
• Fix btf.FindType to avoid copy by @pippolo84 in #424
• Fix missing close of fds from BPF{ProgLoad,MapCreate} by @pippolo84 in #428
• Directly handle int32 and int64 types in unmarshalBytes() by @rockdaboot in #427

Examples

• Add kprobepin example showing how to re-use a pinned map in a BPF prog by @ungureanuvladvictor in #364
• examples: adapt uretprobe example to the new library version by @mmat11 in #389
• CI: build examples by @lmb in #390
• Add a script to update vendored libbpf headers for examples by @markpash in #394
• Add an example for the RINGBUF map type by @pippolo84 in #412
• Add a tracepoint example and a percpu example by @hao-lee in #402
• examples - convert to new rlimit package for memlock removal by @ti-mo in #441

New Contributors

• @zf1575192187 made their first contribution in #350
• @sharjeelaziz made their first contribution in #349
• @zeffron made their first contribution in #352
• @yadutaf made their first contribution in #341
• @guodongzz made their first contribution in #365
• @xh4n3 made their first contribution in #367
• @cuonglm made their first contribution in #376
• @mabis made their first contribution in #378
• @arikachen made their first contribution in #391
• @markpash made their first contribution in #394
• @pippolo84 made their first contribution in #401
• @folbricht made their first contribution in #392
• @hao-lee made their first contribution in #414
• @rockdaboot made their first contribution in #420
• @mehrdadrad made their first contribution in #439
• @lizrice made their first contribution in #442

This release saw a record amount of new contributors! We'd like to wish everyone a warm welcome and thank you all for your support!

Full Changelog: v0.6.2...v0.7.0