Blob Blame Raw
From a577ed3eaa3c3ba84133d9bea1907c69c01063ad Mon Sep 17 00:00:00 2001
From: Laszlo Ersek <lersek@redhat.com>
Date: Sat, 11 Jan 2014 18:00:06 +0100
Subject: [PATCH 16/22] i440fx-test: generate temporary firmware blob

RH-Author: Laszlo Ersek <lersek@redhat.com>
Message-id: <1389463208-6278-17-git-send-email-lersek@redhat.com>
Patchwork-id: 56629
O-Subject: [RHEL-7.0 qemu-kvm PATCH 16/18] i440fx-test: generate temporary firmware blob
Bugzilla: 1032346
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Amos Kong <akong@redhat.com>
RH-Acked-by: Andrew Jones <drjones@redhat.com>

The blob is 64K in size and contains 0x00..0xFF repeatedly.

The client code added to main() wouldn't make much sense in the long term.
It helps with debugging and it silences gcc about create_blob_file() being
unused, and we'll replace it in the next patch anyway.

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 27d59ccd89a5b112e5a5804250440ea30dbfb891)
---
 tests/i440fx-test.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 tests/i440fx-test.c |   60 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 60 insertions(+), 0 deletions(-)

diff --git a/tests/i440fx-test.c b/tests/i440fx-test.c
index 3962bca..b6e0cd3 100644
--- a/tests/i440fx-test.c
+++ b/tests/i440fx-test.c
@@ -20,6 +20,11 @@
 
 #include <glib.h>
 #include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/mman.h>
+#include <stdlib.h>
 
 #define BROKEN 1
 
@@ -272,13 +277,68 @@ static void test_i440fx_pam(gconstpointer opaque)
     qtest_end();
 }
 
+#define BLOB_SIZE ((size_t)65536)
+
+/* Create a blob file, and return its absolute pathname as a dynamically
+ * allocated string.
+ * The file is closed before the function returns.
+ * In case of error, NULL is returned. The function prints the error message.
+ */
+static char *create_blob_file(void)
+{
+    int ret, fd;
+    char *pathname;
+    GError *error = NULL;
+
+    ret = -1;
+    fd = g_file_open_tmp("blob_XXXXXX", &pathname, &error);
+    if (fd == -1) {
+        fprintf(stderr, "unable to create blob file: %s\n", error->message);
+        g_error_free(error);
+    } else {
+        if (ftruncate(fd, BLOB_SIZE) == -1) {
+            fprintf(stderr, "ftruncate(\"%s\", %zu): %s\n", pathname,
+                    BLOB_SIZE, strerror(errno));
+        } else {
+            void *buf;
+
+            buf = mmap(NULL, BLOB_SIZE, PROT_WRITE, MAP_SHARED, fd, 0);
+            if (buf == MAP_FAILED) {
+                fprintf(stderr, "mmap(\"%s\", %zu): %s\n", pathname, BLOB_SIZE,
+                        strerror(errno));
+            } else {
+                size_t i;
+
+                for (i = 0; i < BLOB_SIZE; ++i) {
+                    ((uint8_t *)buf)[i] = i;
+                }
+                munmap(buf, BLOB_SIZE);
+                ret = 0;
+            }
+        }
+        close(fd);
+        if (ret == -1) {
+            unlink(pathname);
+            g_free(pathname);
+        }
+    }
+
+    return ret == -1 ? NULL : pathname;
+}
+
 int main(int argc, char **argv)
 {
+    char *fw_pathname;
     TestData data;
     int ret;
 
     g_test_init(&argc, &argv, NULL);
 
+    fw_pathname = create_blob_file();
+    g_assert(fw_pathname != NULL);
+    unlink(fw_pathname);
+    g_free(fw_pathname);
+
     data.num_cpus = 1;
 
     g_test_add_data_func("/i440fx/defaults", &data, test_i440fx_defaults);
-- 
1.7.1