Libbpf is used by xtasks, in the command, ensure that the submodules
are initialized. This eases the user-experience so that users don't
need to think about the submodule, while retaining all the benefits
of using a submodule vs forcing the user to manually check out libbpf
and stick it in some pre-defined place.
We use the symbol pointing to libbpf in xtask in the build script
to avoid repeating this constant.
Also, we install git in the vm so that we can init the submodule
when we build in the vm.
Emit "cargo:rerun-if-changed={}" for each transitive dependency on
integration-ebpf. In a normal world we'd just add integration-ebpf to
our build-dependencies, but cargo ignores this because integration-ebpf
has no library targets.
The matches crate has been archived now that `matches!` is in std.
However `assert_matches!` is still unstable in std, and the
assert_matches crate provides a more expressive form:
```
assert_matches!(foo, Ok(bar) => {
assert_eq!(bar, baz);
});
```
This feature is equivalent to async_tokio || async_std; removing it
avoids warnings emitted during `cargo hack check --feature-powerset`
where async is selected without either of the other features.
Use cargo hack to ensure clippy runs on the powerset of features.
This slightly changes the site layout: crate documentation is now flat
rather than being nested under "user" and "bpf".
- Run `cargo clean --doc` before generating docs to ensure hermiticity.
- Generate header.html into a temporary directory.
- Remove "site" on each run to ensure hermiticity.
- Invoke cargo only once.
- Avoid editing sources.
So to build/check things using the bpf target one can:
cd bpf && cargo check && cargo build
without having to manually pass --target=bpfel-unknown-none -Z
build-std=core.
It also fixes cargo xtask docs, since the command relies on bpf docs
being built with the bpfel-unknown-none target.
in the integration tests we recenctly switched to using
our internal api to list programs. I was seeing times when
this would race and panic internally (program fd was deleted
by aya WHILE we were trying to get it). This ensures that
the list succeeded without panicking.
Signed-off-by: Andrew Stoycos <astoycos@redhat.com>
Add integration testing for link pinning and
loading/unloading of tracepoint, kprobe, and
uprobe programs.
Redo how we utilize bpftool to verify that programs
are loaded to be explicit with names. Also add a helper
to verify that a program is loaded AND linked.
Signed-off-by: Andrew Stoycos <astoycos@redhat.com>
We need bpftool to add tests for the link APIs since we don't yet have
and aya API for listing links.
Signed-off-by: Andrew Stoycos <astoycos@redhat.com>
Implement TryFrom functions to convert Fdlink to PerfLink/TracePointLink/
KprobeLink, and UprobeLink and vice-versa.
This allows us to pin taken links for perf programs, ultimately
ensuring the link isn't dropped when the loading process exits.
Signed-off-by: Andrew Stoycos <astoycos@redhat.com>
"integration tests" as defined by Cargo produce a binary per file in the
tests directory. This is really not what we want and has a number of
downsides, but the main one is binary size.
Before:
tamird@pc:~/src/aya$ cargo xtask build-integration-test | xargs ls -lah
Finished dev [unoptimized + debuginfo] target(s) in 0.05s
Running `target/debug/xtask build-integration-test`
Compiling integration-test v0.1.0 (/home/tamird/src/aya/test/integration-test)
Finished dev [unoptimized + debuginfo] target(s) in 0.68s
-rwxrwxr-x 1 tamird tamird 34M Jul 12 15:21 /home/tamird/src/aya/target/debug/deps/bpf_probe_read-e03eb905a5e6209c
-rwxrwxr-x 1 tamird tamird 35M Jul 12 15:21 /home/tamird/src/aya/target/debug/deps/btf_relocations-57a4fbb38bf06064
-rwxrwxr-x 1 tamird tamird 31M Jul 12 15:21 /home/tamird/src/aya/target/debug/deps/elf-98b7a32d6d04effb
-rwxrwxr-x 1 tamird tamird 6.9M Jul 12 15:21 /home/tamird/src/aya/target/debug/deps/integration_test-0dd55ce96bfdad77
-rwxrwxr-x 1 tamird tamird 34M Jul 12 15:21 /home/tamird/src/aya/target/debug/deps/load-0718562e85b86d03
-rwxrwxr-x 1 tamird tamird 40M Jul 12 15:21 /home/tamird/src/aya/target/debug/deps/log-dbf355f9ea34068a
-rwxrwxr-x 1 tamird tamird 36M Jul 12 15:21 /home/tamird/src/aya/target/debug/deps/rbpf-89a1bb848fa5cc3c
-rwxrwxr-x 1 tamird tamird 34M Jul 12 15:21 /home/tamird/src/aya/target/debug/deps/relocations-cfe655c3bb413d8b
-rwxrwxr-x 1 tamird tamird 34M Jul 12 15:21 /home/tamird/src/aya/target/debug/deps/smoke-ccd3974180a3fd29
After:
tamird@pc:~/src/aya$ cargo xtask build-integration-test | xargs ls -lah
Finished dev [unoptimized + debuginfo] target(s) in 0.05s
Running `target/debug/xtask build-integration-test`
Compiling integration-test v0.1.0 (/home/tamird/src/aya/test/integration-test)
Finished dev [unoptimized + debuginfo] target(s) in 0.90s
-rwxrwxr-x 1 tamird tamird 47M Jul 12 15:21 /home/tamird/src/aya/target/debug/deps/integration_test-0dd55ce96bfdad77
Since we plan to run these tests in a VM, copying 10x fewer bytes seems
like a win.
Use the environment variable AYA_BUILD_INTEGRATION_BPF to indicate to
the build script that it should *actually* build bpf, otherwise emitting
empty files.
This allows metadata builds to skip costly build steps without
sacrificing ergonomics; all compile-time tools such as cargo clippy work
out of the box.
Cargo even gives each of these builds (depending on the value of the
environment variable) its own cache key, so they do not invalidate each
other when the user alternates between metadata and real builds.
This allows the lint action to move out of the VM.
- Add libbpf as a submodule. This prevents having to plumb its location
around (which can't be passed to Cargo build scripts) and also
controls the version against which codegen has run.
- Move bpf written in C to the integration-test crate and define
constants for each probe.
- Remove magic; each C source file must be directly enumerated in the
build script and in lib.rs.
Replace all `assert!(matches!(..))` with `assert_matches!(..)`.
Remove the now-unused build-integration-test xtask command whose logic
doesn't match that of the build-and-run command.
Andrew Werner
Tamir Duberstein
Alessandro Decina
Mary
Andrew Stoycos