tests/qtest/tpm: Clean up remainders of swtpm

After running "make check", there are remainders of the tpm
tests left in the /tmp directory, slowly filling it up.
Seems like "swtpm" leaves a ".lock" and a "tpm2-00.permall"
file behind, so that the g_rmdir() calls on the temporary
directories fail. Introduce a helper function to remove those
leftovers before doing the g_rmdir().

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 tests/qtest/tpm-util.h                  |  1 +
 tests/qtest/tpm-crb-swtpm-test.c        |  5 ++---
 tests/qtest/tpm-tis-device-swtpm-test.c |  5 ++---
 tests/qtest/tpm-tis-swtpm-test.c        |  5 ++---
 tests/qtest/tpm-util.c                  | 19 +++++++++++++++++++
 5 files changed, 26 insertions(+), 9 deletions(-)

On 10/12/22 04:43, Thomas Huth wrote:
> After running "make check", there are remainders of the tpm
> tests left in the /tmp directory, slowly filling it up.
> Seems like "swtpm" leaves a ".lock" and a "tpm2-00.permall"
> file behind, so that the g_rmdir() calls on the temporary
> directories fail. Introduce a helper function to remove those
> leftovers before doing the g_rmdir().
> 
> Signed-off-by: Thomas Huth <thuth@redhat.com>

Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>

> ---
>   tests/qtest/tpm-util.h                  |  1 +
>   tests/qtest/tpm-crb-swtpm-test.c        |  5 ++---
>   tests/qtest/tpm-tis-device-swtpm-test.c |  5 ++---
>   tests/qtest/tpm-tis-swtpm-test.c        |  5 ++---
>   tests/qtest/tpm-util.c                  | 19 +++++++++++++++++++
>   5 files changed, 26 insertions(+), 9 deletions(-)
> 
> diff --git a/tests/qtest/tpm-util.h b/tests/qtest/tpm-util.h
> index 3b97d69017..80720afac0 100644
> --- a/tests/qtest/tpm-util.h
> +++ b/tests/qtest/tpm-util.h
> @@ -53,5 +53,6 @@ void tpm_util_migration_start_qemu(QTestState **src_qemu,
>                                      const char *machine_options);
> 
>   void tpm_util_wait_for_migration_complete(QTestState *who);
> +void tpm_util_rmdir(const char *path);
> 
>   #endif /* TESTS_TPM_UTIL_H */
> diff --git a/tests/qtest/tpm-crb-swtpm-test.c b/tests/qtest/tpm-crb-swtpm-test.c
> index 55fdb5657d..40254f762f 100644
> --- a/tests/qtest/tpm-crb-swtpm-test.c
> +++ b/tests/qtest/tpm-crb-swtpm-test.c
> @@ -13,7 +13,6 @@
>    */
> 
>   #include "qemu/osdep.h"
> -#include <glib/gstdio.h>
> 
>   #include "libqtest.h"
>   #include "qemu/module.h"
> @@ -62,9 +61,9 @@ int main(int argc, char **argv)
>                           tpm_crb_swtpm_migration_test);
>       ret = g_test_run();
> 
> -    g_rmdir(ts.dst_tpm_path);
> +    tpm_util_rmdir(ts.dst_tpm_path);
>       g_free(ts.dst_tpm_path);
> -    g_rmdir(ts.src_tpm_path);
> +    tpm_util_rmdir(ts.src_tpm_path);
>       g_free(ts.src_tpm_path);
>       g_free(ts.uri);
> 
> diff --git a/tests/qtest/tpm-tis-device-swtpm-test.c b/tests/qtest/tpm-tis-device-swtpm-test.c
> index 7b20035142..8c067fddd4 100644
> --- a/tests/qtest/tpm-tis-device-swtpm-test.c
> +++ b/tests/qtest/tpm-tis-device-swtpm-test.c
> @@ -14,7 +14,6 @@
>    */
> 
>   #include "qemu/osdep.h"
> -#include <glib/gstdio.h>
> 
>   #include "libqtest.h"
>   #include "qemu/module.h"
> @@ -66,9 +65,9 @@ int main(int argc, char **argv)
>                           tpm_tis_swtpm_migration_test);
>       ret = g_test_run();
> 
> -    g_rmdir(ts.dst_tpm_path);
> +    tpm_util_rmdir(ts.dst_tpm_path);
>       g_free(ts.dst_tpm_path);
> -    g_rmdir(ts.src_tpm_path);
> +    tpm_util_rmdir(ts.src_tpm_path);
>       g_free(ts.src_tpm_path);
>       g_free(ts.uri);
> 
> diff --git a/tests/qtest/tpm-tis-swtpm-test.c b/tests/qtest/tpm-tis-swtpm-test.c
> index 90131cb3c4..11539c0a52 100644
> --- a/tests/qtest/tpm-tis-swtpm-test.c
> +++ b/tests/qtest/tpm-tis-swtpm-test.c
> @@ -13,7 +13,6 @@
>    */
> 
>   #include "qemu/osdep.h"
> -#include <glib/gstdio.h>
> 
>   #include "libqtest.h"
>   #include "qemu/module.h"
> @@ -61,9 +60,9 @@ int main(int argc, char **argv)
>                           tpm_tis_swtpm_migration_test);
>       ret = g_test_run();
> 
> -    g_rmdir(ts.dst_tpm_path);
> +    tpm_util_rmdir(ts.dst_tpm_path);
>       g_free(ts.dst_tpm_path);
> -    g_rmdir(ts.src_tpm_path);
> +    tpm_util_rmdir(ts.src_tpm_path);
>       g_free(ts.src_tpm_path);
>       g_free(ts.uri);
> 
> diff --git a/tests/qtest/tpm-util.c b/tests/qtest/tpm-util.c
> index e0dc5da0af..a7efe2d0d2 100644
> --- a/tests/qtest/tpm-util.c
> +++ b/tests/qtest/tpm-util.c
> @@ -13,6 +13,7 @@
>    */
> 
>   #include "qemu/osdep.h"
> +#include <glib/gstdio.h>
> 
>   #include "hw/acpi/tpm.h"
>   #include "libqtest.h"
> @@ -292,3 +293,21 @@ void tpm_util_migration_start_qemu(QTestState **src_qemu,
>       g_free(src_qemu_args);
>       g_free(dst_qemu_args);
>   }
> +
> +/* Remove directory with remainders of swtpm */
> +void tpm_util_rmdir(const char *path)
> +{
> +    char *filename;
> +    int ret;
> +
> +    filename = g_strdup_printf("%s/tpm2-00.permall", path);
> +    g_unlink(filename);
> +    g_free(filename);
> +
> +    filename = g_strdup_printf("%s/.lock", path);
> +    g_unlink(filename);
> +    g_free(filename);
> +
> +    ret = g_rmdir(path);
> +    g_assert(!ret);
> +}