block: Don't throw away errno via error_setg

There are a handful of places in the block layer where a failure path
has a valid -errno value, yet error_setg() is used.  Those instances
should instead use error_setg_errno(), to preserve as much error
information as possible.

This patch replaces those instances with error_setg_errno(), so that
errno is passed up the stack in the error message.

Reported-By: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/block/vmdk.c b/block/vmdk.c
index e809e2e..ff6f5ee 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1502,7 +1502,7 @@ static int vmdk_create_extent(const char *filename, int64_t filesize,
     if (flat) {
         ret = bdrv_truncate(bs, filesize);
         if (ret < 0) {
-            error_setg(errp, "Could not truncate file");
+            error_setg_errno(errp, -ret, "Could not truncate file");
         }
         goto exit;
     }
@@ -1562,7 +1562,7 @@ static int vmdk_create_extent(const char *filename, int64_t filesize,
 
     ret = bdrv_truncate(bs, le64_to_cpu(header.grain_offset) << 9);
     if (ret < 0) {
-        error_setg(errp, "Could not truncate file");
+        error_setg_errno(errp, -ret, "Could not truncate file");
         goto exit;
     }
 
@@ -1846,7 +1846,7 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
     if (desc_offset == 0) {
         ret = bdrv_truncate(new_bs, desc_len);
         if (ret < 0) {
-            error_setg(errp, "Could not truncate file");
+            error_setg_errno(errp, -ret, "Could not truncate file");
         }
     }
 exit: