raw-posix: Handle errors in raw_create

In qemu-iotests, some large images are created using qemu-img.

Without checks for errors, qemu-img will just create an
empty image, and later read / write tests will fail.

With the patch, failures during image creation are detected
and reported.

Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 12 insertions, 5 deletions

diff --git a/block/raw-posix.c b/block/raw-posix.c
index fa4f83e8f..389903e44 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -852,6 +852,7 @@ again:
 static int raw_create(const char *filename, QEMUOptionParameter *options)
 {
     int fd;
+    int result = 0;
     int64_t total_size = 0;
 
     /* Read out options */
@@ -864,11 +865,17 @@ static int raw_create(const char *filename, QEMUOptionParameter *options)
 
     fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
               0644);
-    if (fd < 0)
-        return -EIO;
-    ftruncate(fd, total_size * 512);
-    close(fd);
-    return 0;
+    if (fd < 0) {
+        result = -errno;
+    } else {
+        if (ftruncate(fd, total_size * 512) != 0) {
+            result = -errno;
+        }
+        if (close(fd) != 0) {
+            result = -errno;
+        }
+    }
+    return result;
 }
 
 static void raw_flush(BlockDriverState *bs)