job: Add reference counting

This moves reference counting from BlockJob to Job.

In order to keep calling the BlockJob cleanup code when the job is
deleted via job_unref(), introduce a new JobDriver.free callback. Every
block job must use block_job_free() for this callback, this is asserted
in block_job_create().

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>

1 files changed, 0 insertions, 21 deletions

diff --git a/include/block/blockjob.h b/include/block/blockjob.h
index 01cdee6d15..087e7820f5 100644
--- a/include/block/blockjob.h
+++ b/include/block/blockjob.h
@@ -132,9 +132,6 @@ typedef struct BlockJob {
     /** The opaque value that is passed to the completion function.  */
     void *opaque;
 
-    /** Reference count of the block job */
-    int refcnt;
-
     /** True when job has reported completion by calling block_job_completed. */
     bool completed;
 
@@ -400,24 +397,6 @@ void block_job_iostatus_reset(BlockJob *job);
 BlockJobTxn *block_job_txn_new(void);
 
 /**
- * block_job_ref:
- *
- * Add a reference to BlockJob refcnt, it will be decreased with
- * block_job_unref, and then be freed if it comes to be the last
- * reference.
- */
-void block_job_ref(BlockJob *job);
-
-/**
- * block_job_unref:
- *
- * Release a reference that was previously acquired with block_job_ref
- * or block_job_create. If it's the last reference to the object, it will be
- * freed.
- */
-void block_job_unref(BlockJob *job);
-
-/**
  * block_job_txn_unref:
  *
  * Release a reference that was previously acquired with block_job_txn_add_job