1 files changed, 9 insertions, 6 deletions

diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h
index 8947abab76..9c569be162 100644
--- a/include/block/block_int-common.h
+++ b/include/block/block_int-common.h
@@ -433,9 +433,12 @@ struct BlockDriver {
      * that it can do IOMMU mapping with VFIO etc., in order to get better
      * performance. In the case of VFIO drivers, this callback is used to do
      * DMA mapping for hot buffers.
+     *
+     * Returns: true on success, false on failure
      */
-    void (*bdrv_register_buf)(BlockDriverState *bs, void *host, size_t size);
-    void (*bdrv_unregister_buf)(BlockDriverState *bs, void *host);
+    bool (*bdrv_register_buf)(BlockDriverState *bs, void *host, size_t size,
+                              Error **errp);
+    void (*bdrv_unregister_buf)(BlockDriverState *bs, void *host, size_t size);
 
     /*
      * This field is modified only under the BQL, and is part of
@@ -1051,7 +1054,7 @@ struct BlockDriverState {
     /*
      * Flags honored during pread
      */
-    unsigned int supported_read_flags;
+    BdrvRequestFlags supported_read_flags;
     /*
      * Flags honored during pwrite (so far: BDRV_REQ_FUA,
      * BDRV_REQ_WRITE_UNCHANGED).
@@ -1069,12 +1072,12 @@ struct BlockDriverState {
      * flag), or they have to explicitly take the WRITE permission for
      * their children.
      */
-    unsigned int supported_write_flags;
+    BdrvRequestFlags supported_write_flags;
     /*
      * Flags honored during pwrite_zeroes (so far: BDRV_REQ_FUA,
      * BDRV_REQ_MAY_UNMAP, BDRV_REQ_WRITE_UNCHANGED)
      */
-    unsigned int supported_zero_flags;
+    BdrvRequestFlags supported_zero_flags;
     /*
      * Flags honoured during truncate (so far: BDRV_REQ_ZERO_WRITE).
      *
@@ -1082,7 +1085,7 @@ struct BlockDriverState {
      * that any added space reads as all zeros. If this can't be guaranteed,
      * the operation must fail.
      */
-    unsigned int supported_truncate_flags;
+    BdrvRequestFlags supported_truncate_flags;
 
     /* the following member gives a name to every node on the bs graph. */
     char node_name[32];