Allow to define programs as public functions (even in library crates)
and then import them.
For example, we can have library crate with `libfoo/src/lib.rs`
containing:
```rust
pub fn my_xdp_program(ctx: XdpContext) -> u32 {
xdp_action::XDP_PASS
}
```
And then a binary importing it:
```rust
pub use libfoo::my_xdp_program;
```
This way, commonly used eBPF programs can be distributed as lib crates.
Tested with: https://github.com/vadorovsky/aya-examples/tree/main/pub-progs
Signed-off-by: Michal Rostecki <vadorovsky@gmail.com>
Kernel 4.15 added a new eBPF program that can
be used with cgroup v2 to control & observe device
access (e.g. read, write, mknod) - `BPF_PROG_TYPE_CGROUP_DEVICE`.
We add the ability to create these programs with the `cgroup_device`
proc macro which creates the `cgroup/dev` link section. Device
details are available to the eBPF program in `DeviceContext`.
The userspace representation is provided with the `CgroupDevice`
structure.
Fixes: #212
Signed-off-by: Milan <milan@mdaverde.com>
This change separates the previous `SkBuffContext` into three structs:
* `SkBuff` which is a wrapper around `__sk_buff` which contains all
possible methods operating on it.
* `SkBuffContext` which is a program context for programs which
**cannot** access `__sk_buff` directly and instead can only use
`load_bytes`.
* `TcContext` which is a classifier context which can access `__sk_buff`
directly, hence exposes `data` and `data_end`.
Signed-off-by: Michal Rostecki <vadorovsky@gmail.com>
This commit moves the aya-log projects from the subtree and adds them to
the main cargo workspace. It also brings the BPF crates into the
workspace and moves the macro crates up a level since they aren't BPF
code.
Miri was disabled for aya-bpf as the previous config wasn't actually
checking anything.
CI, clippy, fmt and release configurations have all been adjusted
appropriately.
CI was not properly running for other supported arches which was also
ixed here.
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
Dave Tucker
Michal Rostecki
Milan
Dmitry Savintsev