block/file-posix: Small fixes in raw_create()

Variables should be declared at the start of a block, and if a certain
parameter value is not supported it may be better to return -ENOTSUP
instead of -EINVAL.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20170613202107.10125-6-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>

diff --git a/block/file-posix.c b/block/file-posix.c
index 4a40976d4c89e37476f6d38a9ae0c8463b44d0b5..3388def9b1ff08c7a166cecbf58b9b0388a3fde8 100644 (file)
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -1910,6 +1910,8 @@ static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
 #endif
     case PREALLOC_MODE_FULL:
     {
+        int64_t num = 0, left = total_size;
+
         /*
          * Knowing the final size from the beginning could allow the file
          * system driver to do less allocations and possibly avoid
@@ -1921,7 +1923,6 @@ static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
             goto out_close;
         }
 
-        int64_t num = 0, left = total_size;
         buf = g_malloc0(65536);
 
         while (left > 0) {
@@ -1953,7 +1954,7 @@ static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
         }
         break;
     default:
-        result = -EINVAL;
+        result = -ENOTSUP;
         error_setg(errp, "Unsupported preallocation mode: %s",
                    PreallocMode_lookup[prealloc]);
         break;