[PATCH] block/copy-before-write: use uint64_t for timeout in nanoseconds

[Fiona Ebner <f.ebner@proxmox.com>]

rather than the uint32_t for which the maximum is slightly more than 4
seconds and larger values would overflow. The QAPI interface allows
specifying the number of seconds, so only values 0 to 4 are safe right
now, other values lead to a much lower timeout than a user expects.

The block_copy() call where this is used already takes a uint64_t for
the timeout, so no change required there.

Fixes: 6db7fd1ca9 ("block/copy-before-write: implement cbw-timeout option")
Reported-by: Friedrich Weber <f.weber@proxmox.com>
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---
 block/copy-before-write.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/copy-before-write.c b/block/copy-before-write.c
index 8aba27a71d..026fa9840f 100644
--- a/block/copy-before-write.c
+++ b/block/copy-before-write.c
@@ -43,7 +43,7 @@ typedef struct BDRVCopyBeforeWriteState {
     BlockCopyState *bcs;
     BdrvChild *target;
     OnCbwError on_cbw_error;
-    uint32_t cbw_timeout_ns;
+    uint64_t cbw_timeout_ns;
 
     /*
      * @lock: protects access to @access_bitmap, @done_bitmap and
-- 
2.39.2