This commit removes memset and memcpy, relying instead on
implementations provided by std/compiler-builtins.
This commit adds `#![no_builtins]` to all the BPF programs written in
Rust, and the same should be propagated to aya-template and all examples
in the book and elsewhere before this commit is merged.
It turns out that without the `#![no_builtins]` annotation rustc
generates LLVM IR that calls LLVM intrinsics rather than libcalls. These
may end up as libcalls after lowering, but not before emitting errors in
BPF lowering[0].
This works thanks to https://github.com/rust-lang/rust/pull/113716 which
causes `#![no_builtins]` to behave similarly to `-fno-builtin` in clang,
which was added in https://reviews.llvm.org/D68028 with similar
motivation.
This commit implies that we now require rustc nightly >= 2023-07-20.
[0] https://github.com/llvm/llvm-project/blob/7b2745b/llvm/lib/Target/BPF/BPFISelLowering.cpp#L472-L474
Not using the `dep:` syntax created a Cargo feature flag for async-io,
though this feature alone does nothing without the `async_std` or
`async_tokio` features.
This implements the userspace binding for RingBuf.
Instead of streaming the samples as heap buffers, the process_ring
function takes a callback to which we pass the event's byte region,
roughly following [libbpf]'s API design. This avoids a copy and allows
marking the consumer pointer in a timely manner.
[libbpf]: https://github.com/libbpf/libbpf/blob/master/src/ringbuf.c
Additionally, integration tests are added to demonstrate the usage
of the new APIs and to ensure that they work end-to-end.
Co-authored-by: William Findlay <william@williamfindlay.com>
Co-authored-by: Tatsuyuki Ishi <ishitatsuyuki@gmail.com>
Add coverage to the new public api's for
map pinning (pin and unpin) which can be called
on the generic aya::Map type OR explit map types.
Additionally add coverage for the new libbpf
LIBBPF_PIN_BY_NAME behavior.
Signed-off-by: astoycos <astoycos@redhat.com>
- Adds new `maps_mut()` API to the BpfManager to allow us to iterate though
and pin all of maps at the same time.
- Adds new pin(Path)/unpin(Path) api to Maps so they
can be generically pinned AFTER load.
- Adds macro for pinning explicit map types in aya.
Convert all explicit map types "inner" field to be
pub crate in order to facilitate this.
Signed-off-by: astoycos <astoycos@redhat.com>
Aligns with libbpf for the special LIBBPF_PIN_BY_NAME
map flag. Specifically if the flag is provided without a pin path
default to "/sys/fs/bpf".
Signed-off-by: astoycos <astoycos@redhat.com>
Using the prefix only for the host architecture is often not enough,
kernels usually provide symbols for more architectures, which are
used by multilib applications. Handling them might or might not be
necessary depending on the use case. Due to that complexity, we
decided to let the callers to handle prefixes the way they prefer.
Tamir Duberstein
dependabot[bot]
Tuetuopay
Alessandro Decina
ajwerner
William Findlay
Andrew Stoycos
vadorovsky