cilium/ebpf v0.13.0 on GitHub

Faster btf.LoadKernelSpec()

Obtaining the kernel's BTF used to be very slow and is now very fast. See #1235 by @lmb.

TCX

It's now possible to attach TC programs using the new bpf_link based TCX API. See #1163 by @lmb.

UprobeMulti and UretprobeMulti

These are the user-space equivalents to KprobeMulti and Kretprobe multi and allow
attaching to a large number of symbols quickly. See #1269 by @olsajiri.

Netfilter link

There is now support to attach Netfilter programs using bpf_links. See #1313 by @mehrdadrad.

Better ELF section naming compatibility

The list of recognised ELF section names is now automatically generated from
libbpf and should be more accurate and easier to keep up to date. See #1209 by @lmb.

Pre-allocate per-CPU values

It's now possible to cut down on allocations by pre-allocating per-CPU values. See #1220 by @alxn.

Batch operation support for per-CPU values

Batch operations like Map.BatchLookup now support per-CPU values. Note that this
is not particularly optimised, please check whether it is faster based on your
use case. See #1192 by @alxn.

Breaking changes

This release requires at least Go 1.21.

github.com/cilium/ebpf

(*Map).BatchLookup, (*Map).BatchLookupAndDelete: now take a MapBatchCursor.
The previous implementation did not properly account for differences between
map types and was unsafe.

github.com/cilium/ebpf/btf

CORERelocate: now takes an additional argument, which is usually Spec.TypeID.
MarshalExtInfos: now takes an additional *Builder instead of allocating it.
Simply pass NewBuilder().

Both of these are considered somewhat internal API of the library.

github.com/cilium/ebpf/features

HaveBoundedLoops: changed from var to func
HaveLargeInstructions: changed from var to func
HaveV2ISA: changed from var to func
HaveV3ISA: changed from var to func

github.com/cilium/ebpf/link

QueryOptions.Path: removed. Instead, pass an fd to the directory via QueryOptions.Target.
QueryPrograms: now returns QueryResult to be able to extend the API.
RawAttachProgramOptions.Replace: removed. Instead, pass ReplaceProgram() to RawAttachProgramOptions.Anchor.

What's Changed

btf: fix CO-RE relocations for local type id by @lmb in #1191
fix data race by caching ring buffer size by @brycekahle in #1217
elf: generate ELF section patterns from libbpf by @lmb in #1209
Move PossibleCPUs to a public API by @alxn in #1219
CI: add go-apidiff check by @lmb in #1225
CI: fix trusted workflow by @lmb in #1227
CI: allow writing PRs from trusted workflow by @lmb in #1228
link: add TCX support by @lmb in #1163
map: allow pre-allocating per-CPU values on lookup by @alxn in #1220
CI: store apidiff as json artifact by @lmb in #1229
docs: split CONTRIBUTING.md into separate pages by @lmb in #1221
CI: add logging to trusted workflow by @lmb in #1233
Revert "CI: add logging to trusted workflow" by @lmb in #1234
add kfunc benchmark by @lmb in #1231
link: rename First, Last to Head, Tail by @lmb in #1232
docs: remove WIP pages by @lmb in #1236
go.mod: update golang.org/x/sys to v0.15.0 by @tklauser in #1241
map: avoid allocations in MapIterator.Next by @lmb in #1243
map: Introduce BatchCursor abstraction by @christarazi in #1223
Xabier/fix typos by @txabman42 in #1248
build(deps): bump pymdown-extensions from 10.3.1 to 10.5 in /docs by @dependabot in #1246
build(deps): bump mkdocs-material from 9.4.7 to 9.4.14 in /docs by @dependabot in #1247
map: fix flaky TestMapBatch/Hash by @lmb in #1250
CI: execute benchmarks once to prevent bitrot by @lmb in #1244
doc: use Sourcegraph query for list of importers by @lmb in #1252
test: Migrate tests to github.com/go-quicktest/qt by @sayboras in #1253
map: avoid allocations during batch lookup of common types by @lmb in #1254
CI: run tests on arm64 by @lmb in #1245
map: Fix MapBatch test for BatchLookupAndDelete case by @lmb in #1260
link: fix TestUprobeExtWithOpts address by @rgo3 in #1272
cmd/bpf2go: rephrase GOPACKAGE error message by @lmb in #1267
run-tests: fetch kernels and selftests from containers by @lmb in #1264
GH: use an issue form for bug reports by @lmb in #1268
program: fix raw_tracepoint run repeat check bug by @mtardy in #1275
fix make update-kernel-deps by @lmb in #1276
Add per-CPU Map Support to Batch Operations by @alxn in #1192
build(deps): bump mkdocs-material from 9.4.14 to 9.5.3 in /docs by @dependabot in #1285
build(deps): bump mkdocs-git-revision-date-localized-plugin from 1.2.1 to 1.2.2 in /docs by @dependabot in #1287
perf: fix nil pointer when perf map create failed by @cfc4n in #1282
Fix link.Info.XDP comment to match method name by @aibor in #1292
Add link.Info.TCX method by @aibor in #1293
link: add feature test for tcx by @rgo3 in #1294
cmd/bpf2go: Make LoongArch a supported target by @chenhengqi in #1296
features: fix documentation by @lmb in #1299
build(deps): bump gitpython from 3.1.40 to 3.1.41 in /docs by @dependabot in #1302
link: fix tcx feature test by @rgo3 in #1303
build(deps): bump jinja2 from 3.1.2 to 3.1.3 in /docs by @dependabot in #1305
cmd/bpf2go: clean up goarch / clang / linux target handling by @lmb in #1310
add kernel 6.7 by @lmb in #1314
btf: fix slow LoadKernelSpec by making Spec.Copy lazy by @lmb in #1235
cmd/bpf2go: fix s390x target by @lmb in #1312
map: Make the Examples all testable examples. by @alxn in #1278
Add support for uprobe multi link by @olsajiri in #1269
link: add netfilter support by @mehrdadrad in #1313
bpf2go: support specifying output directory and package name by @chent1996 in #1280
build(deps): bump mkdocs-material from 9.5.3 to 9.5.6 in /docs by @dependabot in #1324
bump minimum Go to 1.21 by @lmb in #1331
add support for reading auxv from Go runtime by @paulcacheux in #1319
dependabot: onboard github actions upgrades by @paulcacheux in #1332
build(deps): bump actions/checkout from 3 to 4 by @dependabot in #1334
use slices and maps packages instead of x/exp by @lmb in #1333
build(deps): bump actions/setup-python from 4 to 5 by @dependabot in #1335
build(deps): bump actions/github-script from 3 to 7 by @dependabot in #1336
build(deps): bump actions/upload-artifact from 3 to 4 by @dependabot in #1337
build(deps): bump mkdocs-git-revision-date-localized-plugin from 1.2.2 to 1.2.4 in /docs by @dependabot in #1339
build(deps): bump mkdocs-material from 9.5.6 to 9.5.8 in /docs by @dependabot in #1340
build(deps): bump actions/setup-go from 4 to 5 by @dependabot in #1338
internal: replace internal memoize with sync.OnceValues by @kwakubiney in #1240
fix minor contradiction in comments by @christian-2 in #1341
map: rename BatchCursor to MapBatchCursor by @lmb in #1344

New Contributors

@txabman42 made their first contribution in #1248
@sayboras made their first contribution in #1253
@mtardy made their first contribution in #1275
@cfc4n made their first contribution in #1282
@chent1996 made their first contribution in #1280
@christian-2 made their first contribution in #1341

Full Changelog: v0.12.3...v0.13.0