cilium/ebpf v0.7.0: Honeygopher Edition

release · Oct 11, 2021

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.

Deprecations
- StructOpts has been changed to alias the new StructOpsMap and will be removed in 0.8.0 by @ti-mo in https://github.com/cilium/ebpf/pull/381
- perf.IsClosed() has been deprecated and will be removed in 0.8.0 by @lmb in https://github.com/cilium/ebpf/pull/397
- Collection.Assign() has been removed after a sunset period by @ti-mo in https://github.com/cilium/ebpf/pull/371

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

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

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

@zf1575192187 made their first contribution in https://github.com/cilium/ebpf/pull/350
@sharjeelaziz made their first contribution in https://github.com/cilium/ebpf/pull/349
@zeffron made their first contribution in https://github.com/cilium/ebpf/pull/352
@yadutaf made their first contribution in https://github.com/cilium/ebpf/pull/341
@guodongzz made their first contribution in https://github.com/cilium/ebpf/pull/365
@xh4n3 made their first contribution in https://github.com/cilium/ebpf/pull/367
@cuonglm made their first contribution in https://github.com/cilium/ebpf/pull/376
@mabis made their first contribution in https://github.com/cilium/ebpf/pull/378
@arikachen made their first contribution in https://github.com/cilium/ebpf/pull/391
@markpash made their first contribution in https://github.com/cilium/ebpf/pull/394
@pippolo84 made their first contribution in https://github.com/cilium/ebpf/pull/401
@folbricht made their first contribution in https://github.com/cilium/ebpf/pull/392
@hao-lee made their first contribution in https://github.com/cilium/ebpf/pull/414
@rockdaboot made their first contribution in https://github.com/cilium/ebpf/pull/420
@mehrdadrad made their first contribution in https://github.com/cilium/ebpf/pull/439
@lizrice made their first contribution in https://github.com/cilium/ebpf/pull/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: https://github.com/cilium/ebpf/compare/v0.6.2...v0.7.0