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scsi: assert that callbacks run in the correct AioContext

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Since the removal of AioContext locking, the correctness of the code
relies on running requests from a single AioContext at any given time.

Add assertions that verify that callbacks are invoked in the correct
AioContext.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20231205182011.1976568-3-stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2023-12-05 13:19:59 -05:00 • committed by Kevin Wolf
parent ed18b1ed4f
commit 10bcb0d996
2 changed files with 17 additions and 0 deletions
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3
system/dma-helpers.c
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@ -119,6 +119,9 @@ static void dma_blk_cb(void *opaque, int ret)
trace_dma_blk_cb(dbs, ret);
/* DMAAIOCB is not thread-safe and must be accessed only from dbs->ctx */
assert(ctx == qemu_get_current_aio_context());
dbs->acb = NULL;
dbs->offset += dbs->iov.size;