ci: Test with all meaningful kernels thanks to landlock-test-tools

Test all Landlock ABI versions:
- Linux 5.10: no Landlock support
- Linux 5.15: ABI v1
- Linux 6.1: ABI v2

See https://github.com/landlock-lsm/landlock-test-tools

Signed-off-by: Mickaël Salaün <mic@digikod.net>

.github/workflows/rust.yml

@@ -43,91 +43,47 @@ jobs:
     outputs:
       commits: ${{ toJSON(steps.*.outputs.*) }}
 
-  ubuntu_20_rust_msrv:
-    runs-on: ubuntu-20.04
-    needs: commit_list
-    strategy:
-      fail-fast: false
-      matrix:
-        commit: ${{ fromJSON(needs.commit_list.outputs.commits) }}
-    steps:
-    - uses: actions/checkout@v3
-      with:
-        ref: ${{ matrix.commit }}
-
-    - name: Get MSRV
-      run: sed -n 's/^rust-version = "\([0-9.]\+\)"$/RUST_TOOLCHAIN=\1/p' Cargo.toml >> $GITHUB_ENV
-
-    - name: Install Rust MSRV
-      run: |
-        rm ~/.cargo/bin/{cargo-fmt,rustfmt} || :
-        rustup default ${{ env.RUST_TOOLCHAIN }}
-        rustup update ${{ env.RUST_TOOLCHAIN }}
-
-    - name: Build
-      run: rustup run ${{ env.RUST_TOOLCHAIN }} cargo build --verbose
-
-    - name: Build tests
-      run: rustup run ${{ env.RUST_TOOLCHAIN }} cargo build --tests --verbose
-
-  ubuntu_20_rust_stable:
-    runs-on: ubuntu-20.04
+  ubuntu_22_rust_stable:
+    runs-on: ubuntu-22.04
     needs: commit_list
     strategy:
       fail-fast: false
       matrix:
         commit: ${{ fromJSON(needs.commit_list.outputs.commits) }}
     env:
       LANDLOCK_CRATE_TEST_ABI: 1
+      CARGO: rustup run stable cargo
     steps:
     - name: Install Rust stable
       run: |
         rm ~/.cargo/bin/{cargo-fmt,rustfmt} || :
         rustup default stable
-        rustup component add rustfmt clippy
         rustup update
 
     - uses: actions/checkout@v3
       with:
         ref: ${{ matrix.commit }}
 
-    - name: Build
-      run: rustup run stable cargo build --verbose
-
-    - name: Run tests
-      run: rustup run stable cargo test --verbose
-
-    - name: Check format
-      run: rustup run stable cargo fmt --all -- --check
-
-    - name: Check source with Clippy
-      run: rustup run stable cargo clippy -- --deny warnings
-
-    - name: Check tests with Clippy
-      run: rustup run stable cargo clippy --tests -- --deny warnings
-
-    - name: Check documentation
-      run: rustup run stable cargo doc --no-deps
+    - name: Clone Landlock test tools
+      uses: actions/checkout@v3
+      with:
+        repository: landlock-lsm/landlock-test-tools
+        path: landlock-test-tools
+        fetch-depth: 0
+        ref: test
 
-  ubuntu_22_rust_stable:
-    runs-on: ubuntu-22.04
-    needs: commit_list
-    strategy:
-      fail-fast: false
-      matrix:
-        commit: ${{ fromJSON(needs.commit_list.outputs.commits) }}
-    env:
-      LANDLOCK_CRATE_TEST_ABI: 1
-    steps:
-    - name: Install Rust stable
+    - name: Lift limits
       run: |
-        rm ~/.cargo/bin/{cargo-fmt,rustfmt} || :
-        rustup default stable
-        rustup update
+        sudo -s ulimit -Hl unlimited
+        sudo -s ulimit -l unlimited
+        sudo -s ulimit -Hc unlimited
+        sudo -s ulimit -c unlimited
 
-    - uses: actions/checkout@v3
-      with:
-        ref: ${{ matrix.commit }}
+    - name: Run tests against Linux 5.10
+      run: ./landlock-test-tools/test-rust.sh linux-5.10 0
+
+    - name: Run tests against Linux 5.15
+      run: ./landlock-test-tools/test-rust.sh linux-5.15 1
 
-    - name: Run tests
-      run: rustup run stable cargo test --verbose
+    - name: Run tests against Linux 6.1
+      run: ./landlock-test-tools/test-rust.sh linux-6.1 2