fix(ansible): fixed drivers_test role.

Signed-off-by: Federico Di Pierro <nierro92@gmail.com>

ansible-playbooks/drivers-test.yml

@@ -5,10 +5,25 @@
   import_playbook: build-skeleton.yml
 - name: Include build-scap-open playbook
   import_playbook: build-scap-open.yml
-- name: Include build-drivers-test playbook
-  import_playbook: build-drivers-test.yml  
 
-- name: Play that runs probes tests using drivers_test binary
+# We need this since every VM is going to build its own drivers_test binary,
+# because drivers_test is very tied to the kernel we are running on
+# and must be built on each VM.
+# To eventually (where supported) build drivers_test with modern_bpf support enabled,
+# we need to pass the modern probe skeleton to each VM.
+- name: Play that distributes modern bpf skeleton to VMs
+  hosts: "machines"
+  remote_user: "{{ user }}"
+  gather_facts: false
+  tasks:
+    - name: Copy bpf_probe.skel.h to all VMs
+      ansible.builtin.copy:
+        src: "/tmp/bpf_probe.skel.h"
+        dest: "/tmp"
+        mode: '0755'
+      become: false
+
+- name: Play that builds and runs drivers tests using drivers_test binary
   hosts: "machines"
   gather_facts: true
   remote_user: "{{ user }}"
@@ -26,6 +41,5 @@
         path: "./roles/drivers_test/files/"
         state: absent
       with_items:
-        - "/tmp/drivers_test"
         - "/tmp/scap-open"
         - "/tmp/bpf_probe.skel.h"

ansible-playbooks/roles/drivers_test/tasks/main.yml

@@ -48,10 +48,14 @@
         cmd: >
              cmake
              -DUSE_BUNDLED_DEPS=ON
-             -DBUILD_LIBSCAP_MODERN_BPF=OFF
+             -DBUILD_LIBSCAP_MODERN_BPF={{ modern_bpf_supported }}
+             -DMODERN_BPF_SKEL_DIR=/tmp
              -DBUILD_LIBSCAP_GVISOR=OFF
              -DBUILD_BPF={{ bpf_supported }}
-             -DCREATE_TEST_TARGETS=OFF
+             -DENABLE_DRIVERS_TESTS=On
+             -DCREATE_TEST_TARGETS=On
+             -DENABLE_IA32_TESTS=Off
+             -DSCAP_FILES_SUITE_ENABLE=Off
              ..
         chdir: "{{ remote_repos_folder }}/repos/{{ repos['libs'].name }}/build"
       changed_when: false
@@ -69,6 +73,27 @@
       delegate_to: localhost
       become: false
 
+- name: Build drivers_test binary
+  block:
+    - name: Build drivers_test
+      ansible.builtin.command:
+        cmd: make drivers_test -j {{ cpus }}
+        chdir: "{{ remote_repos_folder }}/repos/{{ repos['libs'].name }}/build"
+      register: dt_result
+      changed_when: false
+  rescue:
+    - name: Print error message to stdout --- drivers_test
+      ansible.builtin.debug:
+        var: dt_result
+  always:
+    - name: Dump error message to file
+      ansible.builtin.copy:
+        content: "{{ dt_result | to_nice_json }}"
+        dest: "{{ output_dest_dir }}/drivers_test_build.json"
+        mode: '0755'
+      delegate_to: localhost
+      become: false
+
 - name: Build and load the kernel module
   block:
     - name: Unload the kernel module
@@ -108,14 +133,7 @@
   block:
     - name: Run drivers_test with kernel module
       ansible.builtin.command:
-        cmd: /tmp/drivers_test -k
-        chdir: "{{ remote_repos_folder }}/repos/{{ repos['libs'].name }}/build"
-      register: result
-      changed_when: false
-
-    - name: Unload the kernel module
-      ansible.builtin.command:
-        cmd: rmmod driver/scap.ko
+        cmd: ./test/drivers/drivers_test -k
         chdir: "{{ remote_repos_folder }}/repos/{{ repos['libs'].name }}/build"
       register: result
       changed_when: false
@@ -158,7 +176,7 @@
   block:
     - name: Run drivers_test with bpf probe
       ansible.builtin.command:
-        cmd: /tmp/drivers_test -b driver/bpf/probe.o
+        cmd: ./test/drivers/drivers_test -b driver/bpf/probe.o
         chdir: "{{ remote_repos_folder }}/repos/{{ repos['libs'].name }}/build"
       register: result
       when: bpf_supported
@@ -180,7 +198,7 @@
   block:
     - name: Run drivers_test with modern-probe
       ansible.builtin.command:
-        cmd: /tmp/drivers_test -m
+        cmd: ./test/drivers/drivers_test -m
         chdir: "{{ remote_repos_folder }}/repos/{{ repos['libs'].name }}/build"
       register: result
       when: modern_bpf_supported