From 1b7e1e3b463a6e5c117498b192cb07603c04b668 Mon Sep 17 00:00:00 2001
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Wed, 30 Sep 2015 18:01:21 +0300
Subject: [PATCH] vhost-user-test: use tmpfs by default
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Most people don't run make check by default, so they skip vhost-user
unit tests.  Solve this by using tmpfs instead, unless hugetlbfs is
specified (using an environment variable).

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 tests/vhost-user-test.c | 37 +++++++++++++++++++++++++------------
 1 file changed, 25 insertions(+), 12 deletions(-)

diff --git a/tests/vhost-user-test.c b/tests/vhost-user-test.c
index 87281b9d9f..5e63cbc112 100644
--- a/tests/vhost-user-test.c
+++ b/tests/vhost-user-test.c
@@ -272,17 +272,11 @@ static void chr_read(void *opaque, const uint8_t *buf, int size)
     g_mutex_unlock(&data_mutex);
 }
 
-static const char *init_hugepagefs(void)
+static const char *init_hugepagefs(const char *path)
 {
-    const char *path;
     struct statfs fs;
     int ret;
 
-    path = getenv("QTEST_HUGETLBFS_PATH");
-    if (!path) {
-        path = "/hugetlbfs";
-    }
-
     if (access(path, R_OK | W_OK | X_OK)) {
         g_test_message("access on path (%s): %s\n", path, strerror(errno));
         return NULL;
@@ -309,19 +303,31 @@ int main(int argc, char **argv)
 {
     QTestState *s = NULL;
     CharDriverState *chr = NULL;
-    const char *hugefs = 0;
+    const char *hugefs;
     char *socket_path = 0;
     char *qemu_cmd = 0;
     char *chr_path = 0;
     int ret;
+    char template[] = "/tmp/vhost-test-XXXXXX";
+    const char *tmpfs;
+    const char *root;
 
     g_test_init(&argc, &argv, NULL);
 
     module_call_init(MODULE_INIT_QOM);
 
-    hugefs = init_hugepagefs();
-    if (!hugefs) {
-        return 0;
+    tmpfs = mkdtemp(template);
+    if (!tmpfs) {
+          g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
+    }
+    g_assert(tmpfs);
+
+    hugefs = getenv("QTEST_HUGETLBFS_PATH");
+    if (hugefs) {
+        root = init_hugepagefs(hugefs);
+        g_assert(root);
+    } else {
+        root = tmpfs;
     }
 
     socket_path = g_strdup_printf("/tmp/vhost-%d.sock", getpid());
@@ -338,7 +344,7 @@ int main(int argc, char **argv)
     g_cond_init(&data_cond);
     g_thread_new(NULL, thread_function, NULL);
 
-    qemu_cmd = g_strdup_printf(QEMU_CMD, hugefs, socket_path);
+    qemu_cmd = g_strdup_printf(QEMU_CMD, root, socket_path);
     s = qtest_start(qemu_cmd);
     g_free(qemu_cmd);
 
@@ -354,5 +360,12 @@ int main(int argc, char **argv)
     unlink(socket_path);
     g_free(socket_path);
 
+    ret = rmdir(tmpfs);
+    if (ret != 0) {
+        g_test_message("unable to rmdir: path (%s): %s\n",
+                       tmpfs, strerror(errno));
+    }
+    g_assert_cmpint(ret, ==, 0);
+
     return ret;
 }