[Qemu-block] [PATCH RFC 01/16] block: Define BLK_PERM_AIO_CONTEXT_CHANGE

[Fam Zheng]

Signed-off-by: Fam Zheng <address@hidden>
---
 block.c               | 2 ++
 include/block/block.h | 7 ++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/block.c b/block.c
index 6e906ec..ae9327b 100644
--- a/block.c
+++ b/block.c
@@ -1547,6 +1547,8 @@ static char *bdrv_perm_names(uint64_t perm)
         { BLK_PERM_WRITE_UNCHANGED, "write unchanged" },
         { BLK_PERM_RESIZE,          "resize" },
         { BLK_PERM_GRAPH_MOD,       "change children" },
+        { BLK_PERM_AIO_CONTEXT_CHANGE,
+                                    "aio context change" },
         { 0, NULL }
     };
 
diff --git a/include/block/block.h b/include/block/block.h
index 5149260..989bdcc 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -221,7 +221,12 @@ enum {
      */
     BLK_PERM_GRAPH_MOD          = 0x10,
 
-    BLK_PERM_ALL                = 0x1f,
+    /**
+     * This permission is required to change the AioContext of this node.
+     */
+    BLK_PERM_AIO_CONTEXT_CHANGE = 0x20,
+
+    BLK_PERM_ALL                = 0x3f,
 };
 
 /* disk I/O throttling */
-- 
2.9.3