librbd/io: send alloc_hint when compression hint is set

Previously the hint would not be set if the object map indicated the
object may exist.

Fixes: https://tracker.ceph.com/issues/49690
Signed-off-by: Jason Dillaman <dillaman@redhat.com>
(cherry picked from commit b52b5fe06d1f88130b72b8357dbf5630c7cf1cbd)

diff --git a/src/librbd/io/ObjectRequest.cc b/src/librbd/io/ObjectRequest.cc
index ffd21dfc617e6b44b65d1609ae04f6a776fdfa7a..0bf2fb2e9a771c031decf53c0984207e73b038d3 100644 (file)
--- a/src/librbd/io/ObjectRequest.cc
+++ b/src/librbd/io/ObjectRequest.cc
@@ -371,7 +371,8 @@ void AbstractObjectWriteRequest<I>::add_write_hint(
     librados::ObjectWriteOperation *wr) {
   I *image_ctx = this->m_ictx;
   std::shared_lock image_locker{image_ctx->image_lock};
-  if (image_ctx->object_map == nullptr || !this->m_object_may_exist) {
+  if (image_ctx->object_map == nullptr || !this->m_object_may_exist ||
+      image_ctx->alloc_hint_flags != 0U) {
     ObjectRequest<I>::add_write_hint(*image_ctx, wr);
   }
 }