add whole-region mmap area for vfu_setup_region() (#225)

If an fd is provided, automatically add a mmap area covering the entire region
unless an mmap_areas array is provided.

Signed-off-by: John Levon <john.levon@nutanix.com>
Reviewed-by: Swapnil Ingle <swapnil.ingle@nutanix.com>

1 files changed, 2 insertions, 6 deletions

diff --git a/lib/private.h b/lib/private.h
index 1674271..84caad5 100644
--- a/lib/private.h
+++ b/lib/private.h
@@ -68,11 +68,6 @@ typedef struct {
 
 struct migration;
 
-struct vfu_sparse_mmap_areas {
-    int nr_mmap_areas;
-    struct iovec areas[];
-};
-
 typedef struct  {
     /* Region flags, see VFU_REGION_FLAG_READ and friends. */
     uint32_t            flags;
@@ -81,7 +76,8 @@ typedef struct  {
     /* Callback that is called when the region is read or written. */
     vfu_region_access_cb_t  *cb;
     /* Sparse mmap areas if set. */
-    struct vfu_sparse_mmap_areas *mmap_areas;
+    struct iovec *mmap_areas;
+    int nr_mmap_areas;
     /* fd for a mappable region, or -1. */
     int fd;
 } vfu_reg_info_t;