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[Qemu-block] [PATCH v3 15/16] block: Add perm assertion on blk_set_aio_c
From: |
Fam Zheng |
Subject: |
[Qemu-block] [PATCH v3 15/16] block: Add perm assertion on blk_set_aio_context |
Date: |
Wed, 24 May 2017 10:52:34 +0800 |
Now that all BB users comply with the BLK_PERM_AIO_CONTEXT_CHANGE
rule, we can assert it.
Signed-off-by: Fam Zheng <address@hidden>
---
block/block-backend.c | 4 ++++
1 file changed, 4 insertions(+)
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) {
--
2.9.4
- [Qemu-block] [PATCH v3 06/16] backup: Request BLK_PERM_AIO_CONTEXT_CHANGE on target, (continued)
- [Qemu-block] [PATCH v3 06/16] backup: Request BLK_PERM_AIO_CONTEXT_CHANGE on target, Fam Zheng, 2017/05/23
- [Qemu-block] [PATCH v3 07/16] backup: Do initial aio context move of target via BB interface, Fam Zheng, 2017/05/23
- [Qemu-block] [PATCH v3 08/16] mirror: Request aio context change permission on target, Fam Zheng, 2017/05/23
- [Qemu-block] [PATCH v3 09/16] commit: Allow aio context change on s->base, Fam Zheng, 2017/05/23
- [Qemu-block] [PATCH v3 10/16] mirror: Do initial aio context move of target via BB interface, Fam Zheng, 2017/05/23
- [Qemu-block] [PATCH v3 11/16] virtio-scsi: Request BLK_PERM_AIO_CONTEXT_CHANGE for dataplane, Fam Zheng, 2017/05/23
- [Qemu-block] [PATCH v3 12/16] virtio-blk: Request BLK_PERM_AIO_CONTEXT_CHANGE for dataplane, Fam Zheng, 2017/05/23
- [Qemu-block] [PATCH v3 13/16] blk: fix aio context loss on media change, Fam Zheng, 2017/05/23
- [Qemu-block] [PATCH v3 14/16] nbd: Allow BLK_PERM_AIO_CONTEXT_CHANGE on BB, Fam Zheng, 2017/05/23
- [Qemu-block] [PATCH v3 15/16] block: Add perm assertion on blk_set_aio_context,
Fam Zheng <=
- [Qemu-block] [PATCH v3 16/16] tests: Add test case for BLK_PERM_AIO_CONTEXT_CHANGE, Fam Zheng, 2017/05/23
- Re: [Qemu-block] [PATCH v3 00/16] block: Protect AIO context change with perm API, Stefan Hajnoczi, 2017/05/31