vmdk: Improve error handling

[mirror_qemu.git] / block / vmdk.c

diff --git a/block/vmdk.c b/block/vmdk.c
index 6cdbfb791e45f1a4c47800b57c61a171b88f2ebf..fa0e8bd168705dcdfe116b59726e9c3728dc5e4e 100644 (file)
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -212,8 +212,10 @@ static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent)
     const char *p_name, *cid_str;
     size_t cid_str_size;
     BDRVVmdkState *s = bs->opaque;
+    int ret;
 
-    if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) {
+    ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
+    if (ret < 0) {
         return 0;
     }
 
@@ -239,10 +241,12 @@ static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid)
     char desc[DESC_SIZE], tmp_desc[DESC_SIZE];
     char *p_name, *tmp_str;
     BDRVVmdkState *s = bs->opaque;
+    int ret;
 
     memset(desc, 0, sizeof(desc));
-    if (bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE) != DESC_SIZE) {
-        return -EIO;
+    ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE);
+    if (ret < 0) {
+        return ret;
     }
 
     tmp_str = strstr(desc, "parentCID");
@@ -254,9 +258,11 @@ static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid)
         pstrcat(desc, sizeof(desc), tmp_desc);
     }
 
-    if (bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE) < 0) {
-        return -EIO;
+    ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE);
+    if (ret < 0) {
+        return ret;
     }
+
     return 0;
 }
 
@@ -1109,7 +1115,10 @@ static int vmdk_write(BlockDriverState *bs, int64_t sector_num,
         /* update CID on the first write every time the virtual disk is
          * opened */
         if (!s->cid_updated) {
-            vmdk_write_cid(bs, time(NULL));
+            ret = vmdk_write_cid(bs, time(NULL));
+            if (ret < 0) {
+                return ret;
+            }
             s->cid_updated = true;
         }
     }