libvhost-user: Dynamically allocate memory for memory slots

Let's prepare for increasing VHOST_USER_MAX_RAM_SLOTS by dynamically
allocating dev->regions. We don't have any ABI guarantees (not
dynamically linked), so we can simply change the layout of VuDev.

Let's zero out the memory, just as we used to do.

Reviewed-by: Raphael Norwitz <raphael@enfabrica.net>
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20240214151701.29906-2-david@redhat.com>
Tested-by: Mario Casquero <mcasquer@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/subprojects/libvhost-user/libvhost-user.h b/subprojects/libvhost-user/libvhost-user.h
index c2352904f0..c882b4e3a2 100644
--- a/subprojects/libvhost-user/libvhost-user.h
+++ b/subprojects/libvhost-user/libvhost-user.h
@@ -398,7 +398,7 @@ typedef struct VuDevInflightInfo {
 struct VuDev {
     int sock;
     uint32_t nregions;
-    VuDevRegion regions[VHOST_USER_MAX_RAM_SLOTS];
+    VuDevRegion *regions;
     VuVirtq *vq;
     VuDevInflightInfo inflight_info;
     int log_call_fd;