4 files changed, 35 insertions, 17 deletions
diff --git a/include/block/block.h b/include/block/block.h
index 623e7fca97..85e4be7462 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -276,7 +276,7 @@ int bdrv_read(BdrvChild *child, int64_t sector_num,
 int bdrv_write(BdrvChild *child, int64_t sector_num,
                const uint8_t *buf, int nb_sectors);
 int bdrv_pwrite_zeroes(BdrvChild *child, int64_t offset,
-                       int count, BdrvRequestFlags flags);
+                       int bytes, BdrvRequestFlags flags);
 int bdrv_make_zero(BdrvChild *child, BdrvRequestFlags flags);
 int bdrv_pread(BdrvChild *child, int64_t offset, void *buf, int bytes);
 int bdrv_preadv(BdrvChild *child, int64_t offset, QEMUIOVector *qiov);
@@ -295,7 +295,7 @@ int coroutine_fn bdrv_co_writev(BdrvChild *child, int64_t sector_num,
  * because it may allocate memory for the entire region.
  */
 int coroutine_fn bdrv_co_pwrite_zeroes(BdrvChild *child, int64_t offset,
-                                       int count, BdrvRequestFlags flags);
+                                       int bytes, BdrvRequestFlags flags);
 BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs,
     const char *backing_file);
 int bdrv_get_backing_file_depth(BlockDriverState *bs);
@@ -411,8 +411,8 @@ void bdrv_drain_all(void);
     }                                                      \
     waited_; })
 
-int bdrv_pdiscard(BlockDriverState *bs, int64_t offset, int count);
-int bdrv_co_pdiscard(BlockDriverState *bs, int64_t offset, int count);
+int bdrv_pdiscard(BlockDriverState *bs, int64_t offset, int bytes);
+int bdrv_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes);
 int bdrv_has_zero_init_1(BlockDriverState *bs);
 int bdrv_has_zero_init(BlockDriverState *bs);
 bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs);
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 748970055e..15fa602150 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -142,7 +142,7 @@ struct BlockDriver {
     BlockAIOCB *(*bdrv_aio_flush)(BlockDriverState *bs,
         BlockCompletionFunc *cb, void *opaque);
     BlockAIOCB *(*bdrv_aio_pdiscard)(BlockDriverState *bs,
-        int64_t offset, int count,
+        int64_t offset, int bytes,
         BlockCompletionFunc *cb, void *opaque);
 
     int coroutine_fn (*bdrv_co_readv)(BlockDriverState *bs,
@@ -163,9 +163,9 @@ struct BlockDriver {
      * will be called instead.
      */
     int coroutine_fn (*bdrv_co_pwrite_zeroes)(BlockDriverState *bs,
-        int64_t offset, int count, BdrvRequestFlags flags);
+        int64_t offset, int bytes, BdrvRequestFlags flags);
     int coroutine_fn (*bdrv_co_pdiscard)(BlockDriverState *bs,
-        int64_t offset, int count);
+        int64_t offset, int bytes);
 
     /*
      * Building block for bdrv_block_status[_above]. The driver should
diff --git a/include/block/blockjob.h b/include/block/blockjob.h
index 09c7c694b5..67c0968fa5 100644
--- a/include/block/blockjob.h
+++ b/include/block/blockjob.h
@@ -321,6 +321,24 @@ 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
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index 999eb2333a..1e05281fff 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -130,7 +130,7 @@ BlockBackend *blk_by_dev(void *dev);
 BlockBackend *blk_by_qdev_id(const char *id, Error **errp);
 void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, void *opaque);
 int blk_pread_unthrottled(BlockBackend *blk, int64_t offset, uint8_t *buf,
-                          int count);
+                          int bytes);
 int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
                                unsigned int bytes, QEMUIOVector *qiov,
                                BdrvRequestFlags flags);
@@ -138,13 +138,13 @@ int coroutine_fn blk_co_pwritev(BlockBackend *blk, int64_t offset,
                                unsigned int bytes, QEMUIOVector *qiov,
                                BdrvRequestFlags flags);
 int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
-                      int count, BdrvRequestFlags flags);
+                      int bytes, BdrvRequestFlags flags);
 BlockAIOCB *blk_aio_pwrite_zeroes(BlockBackend *blk, int64_t offset,
-                                  int count, BdrvRequestFlags flags,
+                                  int bytes, BdrvRequestFlags flags,
                                   BlockCompletionFunc *cb, void *opaque);
 int blk_make_zero(BlockBackend *blk, BdrvRequestFlags flags);
-int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count);
-int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count,
+int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int bytes);
+int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int bytes,
                BdrvRequestFlags flags);
 int64_t blk_getlength(BlockBackend *blk);
 void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr);
@@ -157,7 +157,7 @@ BlockAIOCB *blk_aio_pwritev(BlockBackend *blk, int64_t offset,
                             BlockCompletionFunc *cb, void *opaque);
 BlockAIOCB *blk_aio_flush(BlockBackend *blk,
                           BlockCompletionFunc *cb, void *opaque);
-BlockAIOCB *blk_aio_pdiscard(BlockBackend *blk, int64_t offset, int count,
+BlockAIOCB *blk_aio_pdiscard(BlockBackend *blk, int64_t offset, int bytes,
                              BlockCompletionFunc *cb, void *opaque);
 void blk_aio_cancel(BlockAIOCB *acb);
 void blk_aio_cancel_async(BlockAIOCB *acb);
@@ -165,7 +165,7 @@ int blk_co_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
 int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
 BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf,
                           BlockCompletionFunc *cb, void *opaque);
-int blk_co_pdiscard(BlockBackend *blk, int64_t offset, int count);
+int blk_co_pdiscard(BlockBackend *blk, int64_t offset, int bytes);
 int blk_co_flush(BlockBackend *blk);
 int blk_flush(BlockBackend *blk);
 int blk_commit_all(void);
@@ -220,11 +220,11 @@ int blk_get_open_flags_from_root_state(BlockBackend *blk);
 void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
                   BlockCompletionFunc *cb, void *opaque);
 int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
-                                      int count, BdrvRequestFlags flags);
+                                      int bytes, BdrvRequestFlags flags);
 int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf,
-                          int count);
+                          int bytes);
 int blk_truncate(BlockBackend *blk, int64_t offset, Error **errp);
-int blk_pdiscard(BlockBackend *blk, int64_t offset, int count);
+int blk_pdiscard(BlockBackend *blk, int64_t offset, int bytes);
 int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf,
                      int64_t pos, int size);
 int blk_load_vmstate(BlockBackend *blk, uint8_t *buf, int64_t pos, int size);