Require go 1.17 from now on, since go 1.16 is no longer supported.
Drop go1.16 compatibility.
NOTE we also have to install go 1.18 from Vagrantfile, because
Fedora 35 comes with Go 1.16.x which can't be used.
Note the changes to go.mod and vendor are due to
https://go.dev/doc/go1.17#tools
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
We need to update the eBPF library so that we can get the raw syscall
errors from bpf(2) syscalls using errors.Is.
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
The `errors.Is(err, unix.EINVAL)` check in `haveBpfProgReplace()` was
broken because the `cilium/ebpf` library did not "wrap" errors.
https://github.com/cilium/ebpf/blob/v0.6.0/link/program.go#L72
So the eBPF support of runc was broken for kernel prior to 5.6.
This commit bumps up cilium/ebpf to contain cilium/ebpf PR 320.
Fix opencontainers/runc issue 3008
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
full diff: https://github.com/cilium/ebpf/compare/v0.4.0...v0.5.0
Breaking changes
------------------------------------------
All LoadPinned*() functions now take LoadPinOptions to control loader behaviour.
Simply pass nil to load with default options.
- LoadPinnedMap()
- LoadPinnedProgram()
- LoadPinnedCgroup()
- LoadPinnedIter()
- LoadPinnedRawLink()
- LoadPinnedNetNs()
Bug fixes
------------------------------------------
- Program.IsPinned() now behaves correctly on maps loaded from bpffs
- Map.Pin() no longer clobbers the destination file if it already exists
Features
------------------------------------------
- Attaching to k(ret)probes and tracepoints can now be done with link.Kprobe(),
link.Kretprobe() and link.Tracepoint()
- Programs of type Kprobe automatically get their KernelVersion fields populated
by detecting the kernel version at runtime
- MapOptions now contains a LoadPinOptions
- ProgSpec now contains a Flags field, adding support for BPF_F_SLEEPABLE
- Made BTF map loader more flexible by looping over Vars in a BTF data section
- Pinned Maps and Programs can now be loaded from bpffs in read-or write-only mode
- Added golangci-lint project configuration, running in CI
Examples
------------------------------------------
kprobe and tracepoint examples updated to use the new link.Kprobe() and link.Tracepoint() API
There is now an example for how to attach eBPF programs to uprobes
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Caught by golangci-lint when enabling golint:
libcontainer/cgroups/ebpf/ebpf.go:35:12: SA1019: prog.Attach is deprecated: use link.RawAttachProgram instead. (staticcheck)
if err := prog.Attach(dirFD, ebpf.AttachCGroupDevice, unix.BPF_F_ALLOW_MULTI); err != nil {
^
libcontainer/cgroups/ebpf/ebpf.go:39:13: SA1019: prog.Detach is deprecated: use link.RawDetachProgram instead. (staticcheck)
if err := prog.Detach(dirFD, ebpf.AttachCGroupDevice, unix.BPF_F_ALLOW_MULTI); err != nil {
^
Worth noting that we currently call prog.Detach() with unix.BPF_F_ALLOW_MULTI;
https://github.com/golang/sys/blob/22da62e12c0cd9c1da93581e1113ca4d82a5be14/unix/zerrors_linux.go#L178
BPF_F_ALLOW_MULTI = 0x2
Looking at the source code for prog.Detach(); https://github.com/cilium/ebpf/blob/v0.4.0/prog.go#L579-L581,
this would _always_ produce an error:
if flags != 0 {
return errors.New("flags must be zero")
}
Note that the flags parameter is not used (except for that validation)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
full diff: https://github.com/cilium/ebpf/compare/v0.1.0...v0.2.0
- btf: add go-fuzz targets
- btf: avoid Type copy in FuncProto.walk
- btf: check err in loadSpecFromVmlinux
- btf: handle type name flavours
- CI: test on 5.9 kernel
- cmd/bpf2go: output ELF .o next to the .go file
- link: add AttachSkLookup
- Remove two unused functions
- Support LSM attach
- use buffered I/O to cut down on read syscalls
- Various doc link fixes
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This removes vndr, and swiches to native Go Modules instead. All modules
are kept on the old version.
Keeps the vendor/ dir, so everything is backwards compatible.
Signed-off-by: Odin Ugedal <odin@ugedal.com>
Kir Kolyshkin