Update module github.com/cilium/ebpf to v0.12.2 #98
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This PR contains the following updates:
v0.10.0->v0.12.2Warning
Some dependencies could not be looked up. Check the Dependency Dashboard for more information.
Release Notes
cilium/ebpf (github.com/cilium/ebpf)
v0.12.2Compare Source
This release fixes unmarshaling from a map operation into a
[]byte, see #1180. This is a regression in v0.12.0.We now also properly return an error when the value to unmarshal into is too small, see #1181. This behaviour has existed for a long time.
What's Changed
New Contributors
Full Changelog: cilium/ebpf@v0.12.1...v0.12.2
v0.12.1Compare Source
Fixes
Fix ProgramInfo.Instructions failing to decode ExtInfos
A recent change to ProgramInfo.Instructions failed to take a difference between kernel and ELF wire format into account. This meant that retrieving the instructions of a program from the kernel failed with a error.
See #1168, fixed by #1169.
Fix reading auxv on 32-bit platforms
The code to determine the kernel version from vdso has been broken on 32-bit platforms. Note that 32-bit arches are not officially supported to the fix is best effort.
See #1133, fixed by #1144.
What's Changed
Full Changelog: cilium/ebpf@v0.12.0...v0.12.1
v0.12.0Compare Source
This release requires at least Go 1.20. It is mainly a bugfix release without any expected breaking changes. Map operations have also been made faster on the Go side.
Fixes
Correctly freeze
.rodatamaps.rodatamaps were frozen after programs referring to them were loaded, preventing the verifier from eliminating dead code based on the contents of the.rodatamaps. Upgrade if you're running into odd verifier errors that don't occur on libbpf.See https://github.com/cilium/ebpf/pull/1159.
Fix fd leak in error path of kfunc support
The library leaked file descriptors when trying to use non-existent kfuncs.
See https://github.com/cilium/ebpf/pull/1145.
Fix incorrect formatting of signed BTF enums with negative values
Signed enums with negative values were incorrectly formatted, leading to invalid output from
bpf2go.See https://github.com/cilium/ebpf/pull/1155.
Additions
Map operations using common types are much faster
Keys and values used in map operations were indiscriminately passed through the
encoding/binarypackage. There is now a fast path which skips this step when the in-memory layout of a type is equivalent to the output produced bybinary.Write. The result is less allocations and CPU usage.The optimization doesn't apply to per-CPU maps.
See https://github.com/cilium/ebpf/pull/1062.
What's Changed
New Contributors
Full Changelog: cilium/ebpf@v0.11.0...v0.12.0
v0.11.0: Support for __ksym and __kfuncCompare Source
Breaking changes
This release requires at least Go 1.19.
github.com/cilium/ebpf/btf:
Handle.Spec()now takes abase *Specargument.nilis accepted if the Handle is for vmlinux. If Handle is for a (split BTF) kernel module, pass the result ofLoadKernelSpec().NewHandle()now takes a*Builderinstead of a*Spec.Loading BTF into the kernel now goes via a new
Buildertype. See the 'Additions' section below.github.com/cilium/ebpf/link:
The old API didn't take 32-bit architectures into account.
Fixes
Work around the kernel rejecting some Datasec
The kernel erroneously rejects Datasec where a Typedef, Volatile, Const, Restrict or typeTag follows a Pointer, Struct, Union or Array. There is now a workaround in place, see https://github.com/cilium/ebpf/pull/954.
Marshaling Map keys and values is more efficient
The marshaling code in the library now uses
sync.Poolto re-usebytes.Buffer, which makes common map operations cheaper, see https://github.com/cilium/ebpf/pull/1053.CO-RE relocations are a lot more efficient
The CO-RE code now does much less copying of BTF types, which makes CO-RE relocation a lot faster, especially against large types such as
sk_buff. See https://github.com/cilium/ebpf/pull/1084.Additions
__ksym(kfunc) supportIt's now possible to use new-style BPF helpers aka
kfuncwith the library. Going forward, all new BPF 'helper' functionality in the kernel will be exposed as kfuncs, and new helpers won't be added. See https://github.com/cilium/ebpf/pull/966 and https://github.com/cilium/ebpf/pull/996.__kconfigsupportTracing programs often need to vary their behaviour based on kernel configuration, such as
CONFIG_HZ. Such references to__kconfigvariables are now automatically populated from a variety of sources such as/proc/config.gz. Note that if you run your application implementing ebpf-go in a container, it will need access to the host's /boot on some distributions that don't ship /proc/config(.gz). (notably, Debian-based distros)As a special mention, the
LINUX_HAS_SYSCALL_WRAPPERkconfig is also supported. This allows writing portable kprobes using theBPF_KSYSCALLmacro frombpf_tracing.h.See https://github.com/cilium/ebpf/pull/951, https://github.com/cilium/ebpf/pull/960 and https://github.com/cilium/ebpf/pull/995.
Overwritable perf buffer support
The perf reader now allows creating "overwritable" perf buffers, which always contain the most recent events in case the buffer ever gets full. This is in contrast to regular perf buffers which drop recent events if there is no more space. This is useful to implement "flight recorder" type functionality for events sourced from BPF.
See https://github.com/cilium/ebpf/pull/953.
btf.BuilderConstructing custom BTF type blobs is now possible through the new
btf.Buildertype. Callbtf.NewBuilder()to obtain one,Builder.Add(t btf.Type)to add any types you need, followed bybtf.NewHandle(b btf.Builder)to load the types into the kernel. Builder also has aMarshal()method for serializing the type collection into the canonical BTF format so it can be stored for later use.What's Changed
+buildGo build tags by @ti-mo in https://github.com/cilium/ebpf/pull/888platformPrefixlist with libbpf values by @paulcacheux in https://github.com/cilium/ebpf/pull/982LINUX_HAS_SYSCALL_WRAPPERkconfig by @paulcacheux in https://github.com/cilium/ebpf/pull/995container-allmake invocation by @paulcacheux in https://github.com/cilium/ebpf/pull/1021New Contributors
Full Changelog: cilium/ebpf@v0.10.0...v0.11.0
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