Commit Graph

621 Commits (7b21a2d17eac57696352b2519bd76a4c7e9b1a2b)
 

Author SHA1 Message Date
Alessandro Decina 5836b3f1b8
Merge pull request #149 from willfindlay/program_array
bpf/maps: implement ProgramArray
3 years ago
Alessandro Decina 149fa86de7
Merge pull request #150 from willfindlay/fix-tests
bpf/macros: fix tests
3 years ago
William Findlay b28ae97053
bpf/macros: fix tests
Doctests were broken due to depencencies on a generated vmlinux, incorrect function
signatures, and a missing unsafe keyword.
3 years ago
William Findlay df26fd94a7
bpf/program_array: use never type, add unsafe flag, and document safety 3 years ago
William Findlay ff14493751
bpf/maps: implement ProgramArray
This PR implements the ProgramArray map type in aya-bpf. Includes a convenient tail_call
method that wraps the bpf_tail_call helper.
3 years ago
Alessandro Decina faa36763f7
Merge pull request #146 from dave-tucker/ro-maps
Mark .rodata maps as readonly and freeze on load
3 years ago
Michal Rostecki 54377b6140 aya-bpf: Allow to convert probe arguments to mutable pointers
Before this change, arguments fetched with `arg` from `ProbeContext`
could be only fetched as const pointers. This change allows to get mut
pointers as well.

Signed-off-by: Michal Rostecki <mrostecki@opensuse.org>
3 years ago
Michal Rostecki 5d8afc58f4 aya-bpf-macros: Fix LSM macro documentation
It was causing `cargo doc` inside bpf/ to fail.

Signed-off-by: Michal Rostecki <mrostecki@opensuse.org>
3 years ago
Dave Tucker 65a0b83205 Mark .rodata maps as readonly and freeze on load
This commit marks .rodata maps as BPF_F_RDONLY_PROG when loaded to
prevent a BPF program mutating them.

Initial map data is populated by the loader using the new
`BpfLoader::set_global()` API. The loader will mark
is marked as frozen using bpf_map_freeze to prevent map data
being changed from userspace.

Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
3 years ago
Alessandro Decina 3a4c84fe17
Merge pull request #145 from aya-rs/codegen
Update libbpf to 19656636a9b9a2de1f71fa3135709295c16701cc
3 years ago
Dave Tucker 2b7dda766f btf: Fix for rename of BPF_ -> BPF_CORE_
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
3 years ago
dave-tucker 05d4bc39ea Update libbpf to 19656636a9b9a2de1f71fa3135709295c16701cc 3 years ago
Dave Tucker ef42739c65 .github: force push to codegen branch
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
3 years ago
Dave Tucker f8021c33fc codegen: Add bindings for BPF_F flags
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
3 years ago
Dave Tucker 23d1920854 codegen: add bindings for btf structs
This adds `bpf_btf_info` which can be used to get BPF information via a
syscall. It also adds `btf_line_info` and `btf_func_info` which are
required to parse the line and func info sections of BTF

Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
3 years ago
Dave Tucker facb01f34b ci: Use crabby-the-crab
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
3 years ago
Michal Rostecki 7e2fcd1d6d Support for fentry and fexit programs
fentry and fexit programs are similar to kprobe and kretprobe, but they
are newer and they have practically zero overhead to call before or
after kernel function. Also, fexit programs are focused on access to
arguments rather than the return value.

Those kind of programs were introduced in the following patchset:

https://lwn.net/Articles/804112/

Signed-off-by: Michal Rostecki <mrostecki@opensuse.org>
3 years ago
dependabot[bot] 54b0c67795 build(deps): update object requirement from 0.27 to 0.28
Updates the requirements on [object](https://github.com/gimli-rs/object) to permit the latest version.
- [Release notes](https://github.com/gimli-rs/object/releases)
- [Changelog](https://github.com/gimli-rs/object/blob/master/CHANGELOG.md)
- [Commits](https://github.com/gimli-rs/object/compare/0.27.0...0.28.1)

---
updated-dependencies:
- dependency-name: object
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
3 years ago
Alessandro Decina 317fd576b4
Merge pull request #138 from dave-tucker/nightly
github: Set toolchain override
3 years ago
Dave Tucker 7e7314ff2b github: Set toolchain override
This ensures that the cache action uses the correct Rust version

Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
3 years ago
Alessandro Decina 6313ddfe0c
Merge pull request #136 from nimrodshn/add_impl_pod_for_u128
Implement Pod for u128 and i128
3 years ago
Ubuntu 24a292f605 Implement Pod for u128 3 years ago
Alessandro Decina f34b76c8d3
Merge pull request #134 from aya-rs/codegen
Update libbpf to 93e89b34740c509406e948c78a404dd2fba67b8b
3 years ago
dave-tucker 17d43cd6f8 Update libbpf to 93e89b34740c509406e948c78a404dd2fba67b8b 3 years ago
Alessandro Decina 26d188c659
Merge pull request #125 from dave-tucker/btf
obj: Improve section detection
3 years ago
Alessandro Decina 32dc8a0d97
Merge pull request #132 from eero-thia/thia/safe_map
aya-bpf: remove unnecessary unsafe markers on map functions.
3 years ago
Alessandro Decina 441a660b3e
Merge pull request #131 from eero-thia/thia/safe_iter
aya: Remove unnecessary unsafe markers on map iteration.
3 years ago
Thia Wyrod b655cf973f
aya-bpf: remove unnecessary unsafe markers on map functions.
Map lookup and deletion can yield stale keys and values by virtue of
sharing a data structure with userspace programs and other BPF programs
which can modify it. However, all accesses remain perfectly safe and will
not cause memory corruption or data races.
3 years ago
Thia Wyrod 18970369e2
aya: Remove unnecessary unsafe markers on map iteration.
Map iteration can yield stale keys and values by virtue of sharing a
data structure with BPF programs which can modify it. However, all
accesses remain perfectly safe and will not cause memory corruption or
data races.
3 years ago
Alessandro Decina 07a6016ebb
Merge pull request #120 from eero-thia/thia/dedup
aya: eliminate name duplication in maps and programs.
3 years ago
Thia Wyrod f56dd0a70b
aya: eliminate name duplication in maps and programs.
Map and ProgramData objects had unnecessarily cloned strings for their
names, despite them being just as easily available to external users via
bpf.maps() and bpf.programs().
3 years ago
Alessandro Decina 8043451973 bpf: re-export Lru hash maps from aya_bpf::maps 3 years ago
Alessandro Decina a340c2a9fa
Merge pull request #130 from wg/main
aya: use correct program name when relocating
3 years ago
Will bb8a813eef aya: use correct program name when relocating 3 years ago
Dave Tucker e4d9774bf7 obj: Improve section detection
This commit improves section detection.
Previously, a section named "xdp_metadata" would be interpretted as a
program section, which is incorrect. This commit first attempts to
identify a BPF section by name, then by section.kind() ==
SectionKind::Text (executable code). The computed section kind is
stored in the Section so variants can be easily matched on later.

Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
3 years ago
Alessandro Decina c0f695c4b6 bpf: Add LruHashMap and LruPerCpuHashMap 3 years ago
Alessandro Decina a03426f194
Merge pull request #115 from eero-thia/thia/impl_trait
aya: remove unnecessary usage of &dyn trait in favor of impl trait.
3 years ago
Alessandro Decina 61299e128e
Merge pull request #119 from eero-thia/thia/xdp_metadata
aya-bpf: expose xdp_md of XdpContext and add metadata functions.
3 years ago
Thia Wyrod d280b856bd
aya-bpf: expose xdp_md of XdpContext and add metadata functions. 3 years ago
Thia Wyrod daa7ea6d0d
aya: remove unnecessary usage of &dyn trait in favor of impl trait.
This should improve performance in most situations by eliminating
unnecessary fat pointer indirection.
3 years ago
Alessandro Decina 98b36b23bc
Merge pull request #116 from eero-thia/thia/close
aya: close file descriptors on Map drop.
3 years ago
Alessandro Decina 2955ca1d1f
Merge pull request #121 from eero-thia/thia/programs_mut
aya: programs_mut iterator to complement programs.
3 years ago
Thia Wyrod c7f8db9a0b
aya: programs_mut iterator to complement programs. 3 years ago
Alessandro Decina a6bf554a74
Merge pull request #122 from eero-thia/thia/include_bytes_aligned
aya: expand include_bytes_aligned to accept expressions.
3 years ago
Thia Wyrod 1584bc47bd
aya: close file descriptors on Map drop. 3 years ago
Thia Wyrod f8f17a09fb
aya: expand include_bytes_aligned to accept expressions.
This allows one to this macro with literal expressions involving macros
such as concat! and env!.
3 years ago
Alessandro Decina df393690d3
Merge pull request #114 from deverton/wrap-bpf_get_current_uid_gid
Add wrapper and docs for for bpf_get_current_uid_gid
3 years ago
Dan Everton fa23052e34
Add wrapper and docs for for bpf_get_current_uid_gid 3 years ago
Alessandro Decina 6db30fad9c
Merge pull request #108 from deverton/kprobe-debugfs
Support k/uprobes on older kernels.
3 years ago
Dan Everton 0e84610976
Refactoring after feedback. 3 years ago