Merge tag 'for-upstream' of git://repo.or.cz/qemu/kevin into staging

Block layer patches

- Add vduse-blk export
- Dirty bitmaps: Fix and improve bitmap merge
- gluster: correctly set max_pdiscard
- rbd: report a better error when namespace does not exist
- aio_wait_kick: add missing memory barrier
- Code cleanups

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# gpg:                issuer "kwolf@redhat.com"
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]

* tag 'for-upstream' of git://repo.or.cz/qemu/kevin:
  vduse-blk: Add name option
  vduse-blk: Add serial option
  nbd: Drop dead code spotted by Coverity
  aio_wait_kick: add missing memory barrier
  block/gluster: correctly set max_pdiscard
  block/rbd: report a better error when namespace does not exist
  qsd: document vduse-blk exports
  libvduse: Add support for reconnecting
  vduse-blk: Add vduse-blk resize support
  vduse-blk: Implement vduse-blk export
  libvduse: Add VDUSE (vDPA Device in Userspace) library
  linux-headers: Add vduse.h
  block/export: Abstract out the logic of virtio-blk I/O process
  block/export: Fix incorrect length passed to vu_queue_push()
  block: Support passing NULL ops to blk_set_dev_ops()
  block: simplify handling of try to merge different sized bitmaps
  block: improve block_dirty_bitmap_merge(): don't allocate extra bitmap
  block: block_dirty_bitmap_merge(): fix error path
  block: get rid of blk->guest_block_size
  block: drop unused bdrv_co_drain() API

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

5 files changed, 5 insertions, 16 deletions

diff --git a/include/block/aio-wait.h b/include/block/aio-wait.h
index b39eefb..54840f8 100644
--- a/include/block/aio-wait.h
+++ b/include/block/aio-wait.h
@@ -81,6 +81,8 @@ extern AioWait global_aio_wait;
     AioContext *ctx_ = (ctx);                                      \
     /* Increment wait_->num_waiters before evaluating cond. */     \
     qatomic_inc(&wait_->num_waiters);                              \
+    /* Paired with smp_mb in aio_wait_kick(). */                   \
+    smp_mb();                                                      \
     if (ctx_ && in_aio_context_home_thread(ctx_)) {                \
         while ((cond)) {                                           \
             aio_poll(ctx_, true);                                  \
diff --git a/include/block/block-io.h b/include/block/block-io.h
index 62c84f0..053a271 100644
--- a/include/block/block-io.h
+++ b/include/block/block-io.h
@@ -270,7 +270,6 @@ void bdrv_drained_end_no_poll(BlockDriverState *bs, int *drained_end_counter);
                    cond); })
 
 void bdrv_drain(BlockDriverState *bs);
-void coroutine_fn bdrv_co_drain(BlockDriverState *bs);
 
 int generated_co_wrapper
 bdrv_truncate(BdrvChild *child, int64_t offset, bool exact,
diff --git a/include/block/block_int-io.h b/include/block/block_int-io.h
index bb45420..ded29e7 100644
--- a/include/block/block_int-io.h
+++ b/include/block/block_int-io.h
@@ -102,7 +102,7 @@ bool blk_dev_is_tray_open(BlockBackend *blk);
 void bdrv_set_dirty(BlockDriverState *bs, int64_t offset, int64_t bytes);
 
 void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap **out);
-bool bdrv_dirty_bitmap_merge_internal(BdrvDirtyBitmap *dest,
+void bdrv_dirty_bitmap_merge_internal(BdrvDirtyBitmap *dest,
                                       const BdrvDirtyBitmap *src,
                                       HBitmap **backup, bool lock);
 
diff --git a/include/qemu/hbitmap.h b/include/qemu/hbitmap.h
index 5bd986a..af4e4ab 100644
--- a/include/qemu/hbitmap.h
+++ b/include/qemu/hbitmap.h
@@ -76,20 +76,9 @@ void hbitmap_truncate(HBitmap *hb, uint64_t size);
  *
  * Store result of merging @a and @b into @result.
  * @result is allowed to be equal to @a or @b.
- *
- * Return true if the merge was successful,
- *        false if it was not attempted.
- */
-bool hbitmap_merge(const HBitmap *a, const HBitmap *b, HBitmap *result);
-
-/**
- * hbitmap_can_merge:
- *
- * hbitmap_can_merge(a, b) && hbitmap_can_merge(a, result) is sufficient and
- * necessary for hbitmap_merge will not fail.
- *
+ * All bitmaps must have same size.
  */
-bool hbitmap_can_merge(const HBitmap *a, const HBitmap *b);
+void hbitmap_merge(const HBitmap *a, const HBitmap *b, HBitmap *result);
 
 /**
  * hbitmap_empty:
diff --git a/include/sysemu/block-backend-io.h b/include/sysemu/block-backend-io.h
index 6517c39..ccef514 100644
--- a/include/sysemu/block-backend-io.h
+++ b/include/sysemu/block-backend-io.h
@@ -72,7 +72,6 @@ void blk_error_action(BlockBackend *blk, BlockErrorAction action,
 void blk_iostatus_set_err(BlockBackend *blk, int error);
 int blk_get_max_iov(BlockBackend *blk);
 int blk_get_max_hw_iov(BlockBackend *blk);
-void blk_set_guest_block_size(BlockBackend *blk, int align);
 
 void blk_io_plug(BlockBackend *blk);
 void blk_io_unplug(BlockBackend *blk);