[Qemu-devel] [RFC 08/13] block: drop bdrv_get_aio_context()

[Stefan Hajnoczi <stefanha@redhat.com>]

Associating a BlockDriverState with a single AioContext is not flexible
enough.  Once we make BlockDriverState thread-safe, it will be possible
to call bdrv_*() functions from multiple event loops.

Use the thread-local AioContext pointer instead of
bdrv_get_aio_context().

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 block.c                   | 6 ------
 block/raw-posix.c         | 4 ++--
 block/raw-win32.c         | 2 +-
 include/block/block_int.h | 7 -------
 4 files changed, 3 insertions(+), 16 deletions(-)

diff --git a/block.c b/block.c
index a3323b2..d986fc8 100644
--- a/block.c
+++ b/block.c
@@ -4582,9 +4582,3 @@ out:
         bdrv_delete(bs);
     }
 }
-
-AioContext *bdrv_get_aio_context(BlockDriverState *bs)
-{
-    /* Currently BlockDriverState always uses the main loop AioContext */
-    return qemu_get_aio_context();
-}
diff --git a/block/raw-posix.c b/block/raw-posix.c
index c0ccf27..821c19f 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -796,7 +796,7 @@ static BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd,
     acb->aio_offset = sector_num * 512;
 
     trace_paio_submit(acb, opaque, sector_num, nb_sectors, type);
-    pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
+    pool = aio_get_thread_pool(*get_thread_aio_context());
     return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
 }
 
@@ -1460,7 +1460,7 @@ static BlockDriverAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
     acb->aio_offset = 0;
     acb->aio_ioctl_buf = buf;
     acb->aio_ioctl_cmd = req;
-    pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
+    pool = aio_get_thread_pool(*get_thread_aio_context());
     return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
 }
 
diff --git a/block/raw-win32.c b/block/raw-win32.c
index 7c03b6d..b5e59a8 100644
--- a/block/raw-win32.c
+++ b/block/raw-win32.c
@@ -158,7 +158,7 @@ static BlockDriverAIOCB *paio_submit(BlockDriverState *bs, HANDLE hfile,
     acb->aio_offset = sector_num * 512;
 
     trace_paio_submit(acb, opaque, sector_num, nb_sectors, type);
-    pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
+    pool = aio_get_thread_pool(*get_thread_aio_context());
     return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
 }
 
diff --git a/include/block/block_int.h b/include/block/block_int.h
index ba52247..88c8b52 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -298,13 +298,6 @@ int get_tmp_filename(char *filename, int size);
 void bdrv_set_io_limits(BlockDriverState *bs,
                         BlockIOLimit *io_limits);
 
-/**
- * bdrv_get_aio_context:
- *
- * Returns: the currently bound #AioContext
- */
-AioContext *bdrv_get_aio_context(BlockDriverState *bs);
-
 #ifdef _WIN32
 int is_windows_drive(const char *filename);
 #endif
-- 
1.8.1.4