Re: [Qemu-devel] [PATCH 09/10] vhost-user-test: small changes to init_hugepagefs

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

Hi Paolo,

On 15/11/18 15:31, Paolo Bonzini wrote:
> After the conversion to qgraph, the equivalent of "main" will be in
> a constructor and will run even if the tests are not being requested.
> Therefore, it should not assert that init_hugepagefs succeeds and will
> be called when creating the TestServer.  This patch changes the prototype
> of init_hugepagefs, this way the next patch looks nicer.
> 
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>   tests/vhost-user-test.c | 19 ++++++++++---------
>   1 file changed, 10 insertions(+), 9 deletions(-)
> 
> diff --git a/tests/vhost-user-test.c b/tests/vhost-user-test.c
> index 93d5157b13..a282fc57c8 100644
> --- a/tests/vhost-user-test.c
> +++ b/tests/vhost-user-test.c
> @@ -461,13 +461,19 @@ static void chr_read(void *opaque, const uint8_t *buf, int size)
>       g_mutex_unlock(&s->data_mutex);
>   }
>   
> -static const char *init_hugepagefs(const char *path)
> +static const char *init_hugepagefs(void)
>   {
> +    const char *path = getenv("QTEST_HUGETLBFS_PATH");
>       struct statfs fs;
>       int ret;
>   
> +    if (!path) {
> +        return NULL;
> +    }
> +
>       if (access(path, R_OK | W_OK | X_OK)) {
>           g_test_message("access on path (%s): %s\n", path, strerror(errno));
> +        abort();
>           return NULL;

Can we remove the 'return NULL's now?

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

>       }
>   
> @@ -477,11 +483,13 @@ static const char *init_hugepagefs(const char *path)
>   
>       if (ret != 0) {
>           g_test_message("statfs on path (%s): %s\n", path, strerror(errno));
> +        abort();
>           return NULL;
>       }
>   
>       if (fs.f_type != HUGETLBFS_MAGIC) {
>           g_test_message("Warning: path not on HugeTLBFS: %s\n", path);
> +        abort();
>           return NULL;
>       }
>   
> @@ -974,7 +982,6 @@ static void test_multiqueue(void)
>   
>   int main(int argc, char **argv)
>   {
> -    const char *hugefs;
>       int ret;
>       char template[] = "/tmp/vhost-test-XXXXXX";
>   
> @@ -989,13 +996,7 @@ int main(int argc, char **argv)
>       }
>       g_assert(tmpfs);
>   
> -    hugefs = getenv("QTEST_HUGETLBFS_PATH");
> -    if (hugefs) {
> -        root = init_hugepagefs(hugefs);
> -        g_assert(root);
> -    } else {
> -        root = tmpfs;
> -    }
> +    root = init_hugepagefs() ? : tmpfs;
>   
>       if (qemu_memfd_check(0)) {
>           qtest_add_data_func("/vhost-user/read-guest-mem/memfd",
>