Implements insmod kernel module from local file

qemu-kernel.go

@@ -280,6 +280,16 @@ func (q *QemuSystem) CopyFile(user, localPath, remotePath string) (err error) {
 	return
 }
 
+func (q *QemuSystem) CopyAndInsmod(localKoPath string) (output string, err error) {
+	remoteKoPath := fmt.Sprintf("/tmp/module_%d.ko", rand.Int())
+	err = q.CopyFile("root", localKoPath, remoteKoPath)
+	if err != nil {
+		return
+	}
+
+	return q.Command("root", "insmod "+remoteKoPath)
+}
+
 // CopyAndRun is copy local file to qemu vm then run it
 func (q *QemuSystem) CopyAndRun(user, path string) (output string, err error) {
 	remotePath := fmt.Sprintf("/tmp/executable_%d", rand.Int())

qemu-kernel_test.go

@@ -213,3 +213,30 @@ func TestQemuSystemCopyAndRun(t *testing.T) {
 		t.Fatal("Wrong output from copyied executable (" + output + "," + randStr + ")")
 	}
 }
+
+func TestQemuSystemCopyAndInsmod(t *testing.T) {
+	qemu, err := startTestQemu(t)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer qemu.Stop()
+
+	lsmodBefore, err := qemu.Command("root", "lsmod | wc -l")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, err = qemu.CopyAndInsmod(testConfigSampleKo)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	lsmodAfter, err := qemu.Command("root", "lsmod | wc -l")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if lsmodBefore == lsmodAfter {
+		t.Fatal("insmod returns ok but there is no new kernel modules")
+	}
+}

test.config.go

@@ -7,3 +7,4 @@ package qemukernel
 const testConfigVmlinuz = "tools/qemu-debian-img/vmlinuz-bionic"
 const testConfigInitrd = "tools/qemu-debian-img/initrd-bionic"
 const testConfigRootfs = "tools/qemu-debian-img/bionic.img"
+const testConfigSampleKo = "tools/qemu-debian-img/sample.ko"

tools/qemu-debian-img/.gitignore

@@ -2,3 +2,4 @@
 *.log
 vmlinuz*
 initrd*
+*.ko

tools/qemu-debian-img/Vagrantfile

@@ -14,5 +14,6 @@ Vagrant.configure("2") do |config|
     cp bionic.img /vagrant/
     cp /boot/vmlinuz-* /vagrant/vmlinuz-bionic
     cp /boot/initrd-* /vagrant/vmlinuz-bionic
+    cp /lib/modules/`uname -r`/kernel/lib/test_static_key_base.ko /vagrant/sample.ko
   SHELL
 end