[PULL,23/31] block/vdi: Error out immediately in vdi_create()

Submitted by Kevin Wolf on April 30, 2014, 6:23 p.m.

Details

Message ID 1398882243-14783-24-git-send-email-kwolf@redhat.com
State New
Headers show

Commit Message

Kevin Wolf April 30, 2014, 6:23 p.m.
From: Max Reitz <mreitz@redhat.com>

Currently, if an error occurs during the part of vdi_create() which
actually writes the image, the function stores -errno, but continues
anyway.

Instead of trying to write data which (if it can be written at all) does
not make any sense without the operations before succeeding (e.g.,
writing the image header), just error out immediately.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block/vdi.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Patch hide | download patch | download mbox

diff --git a/block/vdi.c b/block/vdi.c
index 81faa25..27737af 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -756,6 +756,7 @@  static int vdi_create(const char *filename, QEMUOptionParameter *options,
     vdi_header_to_le(&header);
     if (write(fd, &header, sizeof(header)) < 0) {
         result = -errno;
+        goto close_and_exit;
     }
 
     if (bmap_size > 0) {
@@ -769,6 +770,8 @@  static int vdi_create(const char *filename, QEMUOptionParameter *options,
         }
         if (write(fd, bmap, bmap_size) < 0) {
             result = -errno;
+            g_free(bmap);
+            goto close_and_exit;
         }
         g_free(bmap);
     }
@@ -776,10 +779,12 @@  static int vdi_create(const char *filename, QEMUOptionParameter *options,
     if (image_type == VDI_TYPE_STATIC) {
         if (ftruncate(fd, sizeof(header) + bmap_size + blocks * block_size)) {
             result = -errno;
+            goto close_and_exit;
         }
     }
 
-    if (close(fd) < 0) {
+close_and_exit:
+    if ((close(fd) < 0) && !result) {
         result = -errno;
     }