v0.3.0-libbpf-0.8.0

This release of libbpfgo now provides official support for statically/dynamically linking libbpf v0.8.0!!!

Breaking Changes

• ListProgramNames API was removed
• GetUnsafePointer helper was removed

New APIs

• BPFMap.SetValueSize() (calls libbpf bpf_map__set_value_size) #156
• BPFMap.GetValueReadInto() (calls libbpf bpf_map__lookup_elem) #156
  • This enables the use per-cpu arrays, hashmaps, and storage!
• BPFObjectIterator! #166
  • Allows for iterating over each map and program in a BPF object
  • Uses libbpf bpf_object__next_program and bpf_object__next_map
• GetSectionName (calls libbpf bpf_program__section_name) #166
• GetValueFlags()/UpdateValueFlags() #154
  • The enables passing a MapFlag argument to the bpf helper functions bpf_map_update_elem and bpf_map_lookup_elem_flags
• BPFProg.AttachXDP() (calls libbpf bpf_program__attach_xdp) #170
• BPFProg.GetSectionName() (calls libbpf bpf_program_-section_name) #164
• BPFMapTypeIsSupported()/BPFProgramTypeIsSupported() #164
• SetStrictMode() (calls libbpf_set_strict_mode) #160
• BPFLink.Pin()/BPFLink.Unpin() (calls libbpf bpf_link__pin/unpin) #144
• BPFProg.AttachGeneric() (calls libbpf bpf_program__attach) #144
  • Allows for autodetection of bpf program and attach types! This is useful for tracing programs
• BPFProg.SetAttachTarget()/BPFProg.SetAttachType/BPFProg.SetProgramType #144

New Helpers

• You can now use a range of new helpers for parsing options passed to socket syscalls such as setsockopt and getsockopt #181
• CreateMap() (calls bpf_map_create) #138
• BPFMap.Name()/BPFMap.Type (calls libbpf bpf_map__name/bpf_map__type) #138
• BPFMap.SetType() (calls libbpf bpf_map__set_type) #138

New Selftests/examples

• Fentry BPF_PROG_TYPE_TRACING sample #144
• Fentry set attach target selftest #144
• New tc selftest
• New XDP selftest
• Removed the faulty tcpconnect selftest
• VersionString selftest

Notable Fixes

• Kernel symbol helpers will no longer have errant square brackets #153
• Support for arm64 fixes #158
• A lot of error handling fixes #163 #157, #152, #146, #142