block: improve error handling in raw_open

Make raw_open for POSIX more consistent in handling errors by setting
the error object also when qemu_open fails. The error object was set
generally set in case of errors, but I guess this case was overlooked.
Do the same for win32.

Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Tested-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> (POSIX only)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

diff --git a/block/raw-posix.c b/block/raw-posix.c
index 166e9d1..f481e57 100644 (file)
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -443,6 +443,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
     fd = qemu_open(filename, s->open_flags, 0644);
     if (fd < 0) {
         ret = -errno;
+        error_setg_errno(errp, errno, "Could not open '%s'", filename);
         if (ret == -EROFS) {
             ret = -EACCES;
         }

diff --git a/block/raw-win32.c b/block/raw-win32.c
index 734bb10..800fabd 100644 (file)
--- a/block/raw-win32.c
+++ b/block/raw-win32.c
@@ -373,6 +373,7 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
     if (s->hfile == INVALID_HANDLE_VALUE) {
         int err = GetLastError();
 
+        error_setg_win32(errp, err, "Could not open '%s'", filename);
         if (err == ERROR_ACCESS_DENIED) {
             ret = -EACCES;
         } else {