diff mbox

[v3,15/16] block: Add perm assertion on blk_set_aio_context

Message ID 20170524025235.32190-16-famz@redhat.com
State New
Headers show

Commit Message

Fam Zheng May 24, 2017, 2:52 a.m. UTC 
Now that all BB users comply with the BLK_PERM_AIO_CONTEXT_CHANGE
rule, we can assert it.

Signed-off-by: Fam Zheng <famz@redhat.com>
---
 block/block-backend.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox

Patch

diff --git a/block/block-backend.c b/block/block-backend.c
index dfe577d..51c62ea 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -1695,8 +1695,12 @@  static AioContext *blk_aiocb_get_aio_context(BlockAIOCB *acb)
 
 void blk_set_aio_context(BlockBackend *blk, AioContext *new_context)
 {
+    uint64_t perm, shared_perm;
     BlockDriverState *bs = blk_bs(blk);
 
+    blk_get_perm(blk, &perm, &shared_perm);
+    assert(perm & BLK_PERM_AIO_CONTEXT_CHANGE);
+
     blk->aio_context = new_context;
     if (bs) {
         if (blk->public.throttle_state) {