qtest/ahci: add qcow2 support to ahci-test

This will enable the testing of high offsets without
wasting a lot of disk space, and does not impact the
previous tests.

mkimg and mkqcow2 are added to libqos for other tests.

Signed-off-by: John Snow <jsnow@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1426274523-22661-2-git-send-email-jsnow@redhat.com

tests/Makefile

@@ -415,6 +415,7 @@ GCOV_OPTIONS = -n $(if $(V),-f,)
 $(patsubst %, check-qtest-%, $(QTEST_TARGETS)): check-qtest-%: $(check-qtest-y)
 	$(if $(CONFIG_GCOV),@rm -f *.gcda */*.gcda */*/*.gcda */*/*/*.gcda,)
 	$(call quiet-command,QTEST_QEMU_BINARY=$*-softmmu/qemu-system-$* \
+		QTEST_QEMU_IMG=qemu-img$(EXESUF) \
 		MALLOC_PERTURB_=$${MALLOC_PERTURB_:-$$((RANDOM % 255 + 1))} \
 		gtester $(GTESTER_OPTIONS) -m=$(SPEED) $(check-qtest-$*-y),"GTESTER $@")
 	$(if $(CONFIG_GCOV),@for f in $(gcov-files-$*-y); do \

tests/ahci-test.c

@@ -39,8 +39,8 @@
 #include "hw/pci/pci_ids.h"
 #include "hw/pci/pci_regs.h"
 
-/* Test-specific defines. */
+/* Test-specific defines -- in MiB */
-#define TEST_IMAGE_SIZE    (64 * 1024 * 1024)
+#define TEST_IMAGE_SIZE_MB (200 * 1024)
 
 /*** Globals ***/
 static char tmp_path[] = "/tmp/qtest.XXXXXX";
@@ -107,7 +107,7 @@ static AHCIQState *ahci_boot(void)
     s = g_malloc0(sizeof(AHCIQState));
 
     cli = "-drive if=none,id=drive0,file=%s,cache=writeback,serial=%s"
-        ",format=raw"
+        ",format=qcow2"
         " -M q35 "
         "-device ide-hd,drive=drive0 "
         "-global ide-hd.ver=%s";
@@ -1071,7 +1071,6 @@ static void create_ahci_io_test(enum IOMode type, enum AddrMode addr,
 int main(int argc, char **argv)
 {
     const char *arch;
-    int fd;
     int ret;
     int c;
     int i, j, k;
@@ -1108,12 +1107,9 @@ int main(int argc, char **argv)
         return 0;
     }
 
-    /* Create a temporary raw image */
+    /* Create a temporary qcow2 image */
-    fd = mkstemp(tmp_path);
+    close(mkstemp(tmp_path));
-    g_assert(fd >= 0);
+    mkqcow2(tmp_path, TEST_IMAGE_SIZE_MB);
-    ret = ftruncate(fd, TEST_IMAGE_SIZE);
-    g_assert(ret == 0);
-    close(fd);
 
     /* Run the tests */
     qtest_add_func("/ahci/sanity",     test_sanity);

tests/libqos/libqos.c

@@ -61,3 +61,47 @@ void qtest_shutdown(QOSState *qs)
     qtest_quit(qs->qts);
     g_free(qs);
 }
+
+void mkimg(const char *file, const char *fmt, unsigned size_mb)
+{
+    gchar *cli;
+    bool ret;
+    int rc;
+    GError *err = NULL;
+    char *qemu_img_path;
+    gchar *out, *out2;
+    char *abs_path;
+
+    qemu_img_path = getenv("QTEST_QEMU_IMG");
+    abs_path = realpath(qemu_img_path, NULL);
+    assert(qemu_img_path);
+
+    cli = g_strdup_printf("%s create -f %s %s %uM", abs_path,
+                          fmt, file, size_mb);
+    ret = g_spawn_command_line_sync(cli, &out, &out2, &rc, &err);
+    if (err) {
+        fprintf(stderr, "%s\n", err->message);
+        g_error_free(err);
+    }
+    g_assert(ret && !err);
+
+    /* In glib 2.34, we have g_spawn_check_exit_status. in 2.12, we don't.
+     * glib 2.43.91 implementation assumes that any non-zero is an error for
+     * windows, but uses extra precautions for Linux. However,
+     * 0 is only possible if the program exited normally, so that should be
+     * sufficient for our purposes on all platforms, here. */
+    if (rc) {
+        fprintf(stderr, "qemu-img returned status code %d\n", rc);
+    }
+    g_assert(!rc);
+
+    g_free(out);
+    g_free(out2);
+    g_free(cli);
+    free(abs_path);
+}
+
+void mkqcow2(const char *file, unsigned size_mb)
+{
+    return mkimg(file, "qcow2", size_mb);
+}

tests/libqos/libqos.h

@@ -19,6 +19,8 @@ typedef struct QOSState {
 QOSState *qtest_vboot(QOSOps *ops, const char *cmdline_fmt, va_list ap);
 QOSState *qtest_boot(QOSOps *ops, const char *cmdline_fmt, ...);
 void qtest_shutdown(QOSState *qs);
+void mkimg(const char *file, const char *fmt, unsigned size_mb);
+void mkqcow2(const char *file, unsigned size_mb);
 
 static inline uint64_t qmalloc(QOSState *q, size_t bytes)
 {