stop using struct vfio_device_info (#456)

This struct from vfio.h has grown larger in newer Linux versions; this breaks
older clients, as now the server would require the larger size. Replace with our
own definition.

Signed-off-by: John Levon <john.levon@nutanix.com>
Reviewed-by: Thanos Makatos <thanos.makatos@nutanix.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/include/vfio-user.h b/include/vfio-user.h
index 11eb366..053ead2 100644
--- a/include/vfio-user.h
+++ b/include/vfio-user.h
@@ -96,6 +96,17 @@ struct vfio_user_version {
     uint8_t     data[];
 } __attribute__((packed));
 
+/*
+ * Similar to vfio_device_info, but without caps (yet).
+ */
+struct vfio_user_device_info {
+    uint32_t    argsz;
+    /* VFIO_DEVICE_FLAGS_* */
+    uint32_t    flags;
+    uint32_t    num_regions;
+    uint32_t    num_irqs;
+} __attribute__((packed));
+
 struct vfio_user_dma_region {
     uint64_t    addr;
     uint64_t    size;