vn_flush_cached_data: observe vnode locking contract

vm_object_page_clean() expects that the associated vnode is locked as VOP_PUTPAGES() may get called on the vnode. Signed-off-by: Andriy Gapon <[email protected]>
openzfs · Oct 24, 2022 · 3355a3a · 3355a3a
1 parent 0b2428d
commit 3355a3a
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/include/os/freebsd/spl/sys/vnode.h b/include/os/freebsd/spl/sys/vnode.h
@@ -96,9 +96,11 @@ vn_flush_cached_data(vnode_t *vp, boolean_t sync)
 	if (vp->v_object->flags & OBJ_MIGHTBEDIRTY) {
 #endif
 		int flags = sync ? OBJPC_SYNC : 0;
+		vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
 		zfs_vmobject_wlock(vp->v_object);
 		vm_object_page_clean(vp->v_object, 0, 0, flags);
 		zfs_vmobject_wunlock(vp->v_object);
+		VOP_UNLOCK(vp);
 	}
 }
 #endif