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aya/test/integration-ebpf
tyrone-wu cb8e478800
aya,integration-test: improve integration tests for info API
Improves the existing integraiton tests for `loaded_programs()` and
`loaded_maps()` in consideration for older kernels:
  - Opt for `SocketFilter` program in tests since XDP requires v4.8 and
    fragments requires v5.18.
  - For assertion tests, first perform the assertion, if the assertion
    fails, then it checks the host kernel version to see if it is above
    the minimum version requirement. If not, then continue with test,
    otherwise fail.
    For assertions that are skipped, they're logged in stderr which can
    be observed with `-- --nocapture`.

This also fixes the `bpf_prog_get_info_by_fd()` call for kernels below
v4.15. If calling syscall  on kernels below v4.15, it can produce an
`E2BIG` error  because `check_uarg_tail_zero()` expects the entire
struct to all-zero bytes (which is caused from the map info).

Instead, we first attempt the syscall with the map info filled, if it
returns `E2BIG`, then perform syscall again with empty closure.

Also adds doc for which version a kernel feature was introduced for
better  awareness.

The tests have been verified kernel versions:
  - 4.13.0
  - 4.15.0
  - 6.1.0
3 weeks ago
..
.cargo integration-ebpf: add cargo config 1 year ago
src aya,integration-test: improve integration tests for info API 3 weeks ago
Cargo.toml aya,integration-test: improve integration tests for info API 3 weeks ago
build.rs integration-test: Remove cargo symlink workaround 1 year ago
rust-toolchain.toml integration-test: use nightly toolchain with ebpf 1 year ago