libbpf-cargo

What's Changed

libbpf-rs

• Added KprobeMultiLinkInfo & UprobeMultiLinkInfo fields that required a second info call
• Added key_size, value_size and more getters to OpenMap{,Mut}
• Added specific IterLinkInfo fields for LinkTypeInfo::Iter
• Added ErrorKind::TooBig variant, surfaced when the underlying operation fails with E2BIG (e.g., a map reaching max_entries)
• Added MapHandle::from_pinned_path_with_file_flags for opening maps with custom file flags
• Changed name members of query info types to be OsString instead of CString
• Made various query::*Info types non-exhaustive

New Contributors

• @sonisr made their first contribution in #1377
• @fkcrazy001 made their first contribution in #1385
• @cong-or made their first contribution in #1391
• @weriomat made their first contribution in #1402
• @jacob-pro made their first contribution in #1417

Full Changelog: v0.26.2...v0.27.0

What's Changed

libbpf-rs

• Added ProgramMut::assoc_struct_ops for associating non-struct_ops programs with struct_ops maps
• Added IterOpts::None variant for attach_iter_with_opts()
• Updated libbpf-sys dependency to 1.7.0

libbpf-cargo

• Included missing-docs lint suppression on generated skeleton

Full Changelog: v0.26.1...v0.26.2

What's Changed

libbpf-rs

• Added MapCore::query_fdinfo for querying map fdinfo
• Added ProgramType::Netfilter variant
• Adjusted Program::attach_uprobe_multi_with_opts to work with empty func_pattern

libbpf-cargo

• Added SkeletonBuilder::reference_obj for enabling generate skeleton to reference an object file instead of embedding it

New Contributors

• @likewhatevs made their first contribution in #1336

Full Changelog: v0.26.0...v0.26.1

What's Changed

libbpf-rs

• Added Link::info method for retrieving LinkInfo
• Extended LinkTypeInfo::PerfEvent variant to contain newly added PerfEventLinkInfo object
• Added Linker::add_buf method for adding in-memory ELF files to the set of objects to link
• Added Program::attach_iter_with_opts for attaching to iterators with additional options
• Added Program::attach_uprobe_multi & Program::attach_uprobe_multi_opts to enable attachments of multi uprobes at once
• Added Program::{stdout,stderr} for accessing BPF stdout and stderr streams
• Added OpenProgram::autoload getter
• Added OpenMap::autocreate and Map::autocreate getters
• Added MapCore::lookup_into for looking up values into preallocated buffers
• Added verified_insns attribute to query::ProgramInfo type
• Made query::ProgramInfo non-exhaustive
• Added ObjectBuilder::btf_custom_path setter

libbpf-cargo

• Fixed Rust type generation for trailing bitfields in composite C types
• Fixed handling of XxxSkelBuilder::obj_builder customizations when using open() constructor
• Allowlisted libbpf-sys 1.6.3

New Contributors

• @frelon made their first contribution in #1220
• @ver-nyan made their first contribution in #1253
• @vlrpl made their first contribution in #1258
• @sidchintamaneni made their first contribution in #1266
• @tamird made their first contribution in #1308
• @gadol21 made their first contribution in #1322

Full Changelog: v0.26.0-beta.1...v0.26.0

What's Changed

libbpf-cargo

• Allowlisted libbpf-sys 1.6.1

Full Changelog: v0.26.0-beta.0...v0.26.0-beta.1

What's Changed

libbpf-rs

• Added target_obj_id and target_btf_id fields to TracingLinkInfo to expose BTF information directly from kernel queries
• Removed previously deprecated Program::get_id_by_fd method
• Bumped minimum Rust version to 1.82

libbpf-cargo

• Moved BPF object content in generated skeletons into .bpf.objs section allowing easy extraction from the final binary
• Bumped minimum Rust version to 1.82

New Contributors

• @Phoenix500526 made their first contribution in #1186
• @frobware made their first contribution in #1193

Full Changelog: v0.25.0...v0.26.0-beta.0

What's Changed

libbpf-rs

• Added kprobe multi support for attaching programs, with and without providing additional options
• Added Program::attach_perf_event_with_opts for attaching to perf events with additional options
• Allow to provide additional options when attaching programs to raw tracepoints
• Allow to provide additional options when attaching programs to kprobes
• Introduced TracepointCategory enum for specifying tracepoint categories
• Added max_entries getter to various map types
• Added OpenProgramMut::set_autoattach
• Added additional ProgramAttachType and query::LinkTypeInfo variants
• Adjusted UprobeOpts::func_name to be an Option
• Implemented Sync for Link
• Updated libbpf-sys dependency to 1.5.0
• Added ProgramInput::repeat field to run a test multiple times
• Added ProgramOutput::duration field which represent the average duration per repetition
• Added RingBuffer::consume_raw_n method to consume up to N items

libbpf-cargo

• Adjusted all <xxx>_data BPF map skeleton members to be Options
• Adjusted numbering of generated Rust structs for anonymous C types to be less fragile in the presence of type additions
• Removed SkeletonBuilder::skip_clang_version_check and SkeletonBuilder::debug
• Removed --skip-clang-version-checks option of libbpf build sub-command
• Replaced --debug option of libbpf sub-command with -v / --verbose
  • Removed --quiet option of libbpf make sub-command
• Replaced CompilationOutput type with tracing based solution using newly added util::CargoWarningFormatter
• Fixed handling of multiple types of same name in BTF by enumerating them in the generated skeleton
• Bumped minimum Rust version to 1.78

New Contributors

• @Jongy made their first contribution in #1064
• @atenart made their first contribution in #1115
• @josefbacik made their first contribution in #1139
• @volcano0dr made their first contribution in #1142
• @theihor made their first contribution in #1153
• @chantra made their first contribution in #1159
• @SidongYang made their first contribution in #1176
• @Waujito made their first contribution in #1178

Full Changelog: v0.25.0-beta.1...v0.25.0

What's Changed

libbpf-rs

• Adjusted btf::types::EnumMember to store value as i64
• Adjusted btf::types::Enum64Member to store value as i128

libbpf-cargo

• Fixed skeleton generation when enum64 types are present

New Contributors

• @telbizov made their first contribution in #1028

Full Changelog: v0.25.0-beta.0...v0.25.0-beta.1

What's Changed

libbpf-rs

• Added Map::lookup_batch and Map::lookup_and_delete_batch method

libbpf-cargo

• Represent C enums with custom types and const fields
  • Adjusted Rust correspondents in generated skeletons to no longer be wrapped in MaybeUninit
• Adjusted SkeletonBuilder::build* methods to return CompilationOutput on success

New Contributors

• @JakeHillion made their first contribution in #994

Full Changelog: v0.24.8...v0.25.0-beta.0

What's Changed

libbpf-rs

• Added Program::attach_netfilter_with_opts for attaching to netfilter hooks

Full Changelog: v0.24.8...v0.24.8

• Fixed handling of empty unions in BPF types

• Fixed incorrect Cargo environment variable query when used in build script context

• Adjusted skeleton generation code to work around libbpf forward compatibility issue when an old system libbpf is being used instead of the vendored copy

• Silenced possible clippy reported warnings in generated skeleton when BPF object file does not contain any maps

• Fixed panic on "open" of skeleton with kconfig map

• Fixed missing BPF object cleanup after skeleton destruction

• Reworked generated skeletons to contain publicly accessible maps and program members, no longer requiring method calls
• Adjusted skeleton creation logic to generate Rust types for all types available in BPF
• Renamed module for generated Rust types from <project>_types to just types
• Renamed generated struct_ops type to StructOps and moved it out of types module
• Fixed Rust code generation logic to properly create Default impl for arrays of pointers

• Fixed generation of Default impl in presence of large padding arrays

• Added "import injection" escape hatch to generated skeletons

• Removed novendor feature in favor of having disableable default feature
• Added support for struct_ops shadow objects for generated skeletons
• Added support for handling custom data sections in generated skeletons
• Adjusted SkeletonBuilder::clang_args to accept an iterator of arguments instead of a string
• Added --clang-args argument to make and build sub-commands
• Put all generated types into single <project>_types module as opposed to having multiple modules for various sections (.bss, .rodata, etc.)
• Fixed potential naming issues by escaping reserved keywords used in identifiers
• Fixed potential unsoundness issues in generated skeletons by wrapping "unsafe" types in MaybeUninit
• Added pointer based ("raw") access to datasec type to generated skeletons
• Added better handling for bitfields to code generation logic
• Updated libbpf-sys dependency to 1.4.0
• Bumped minimum Rust version to 1.71

• Adjusted skeleton creation logic to generate shared and exclusive datasec accessor functions
• Removed Error enum in favor of anyhow::Error
• Bumped minimum Rust version to 1.65

• Added Default impl for generated struct types containing pointers
• Fixed handling of function prototype type declaration inference in BTF and skeleton generation
• Improved error reporting in build script usage
• Bumped minimum Rust version to 1.64

• Adjusted named padding members in generated types to have pub visibility

• Adjusted skeleton generation code to ensure implementation of libbpf-rs's SkelBuilder, OpenSkel, and Skel traits
• Improved error reporting on BPF C file compilation failure

• Switched over to using libbpf-rs's BTF support internally for skeleton generation
• Fixed potential build failures on systems defaulting to stack protector usage by passing -fno-stack-protector to clang

• Fixed mismatch in size of generated types with respect to corresponding C types
• Fixed generated skeleton potentially being unstable (changing each time)
• Implemented Sync for generated skeletons
• Made formatting using rustfmt optional
• Updated various dependencies