iscsi: Create AIO BH in original AioContext

AIO callbacks must be called in the original request’s AioContext,
regardless of the BDS’s “main” AioContext.

Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Message-ID: <20251110154854.151484-18-hreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

diff --git a/block/iscsi.c b/block/iscsi.c
index 852ecccf0df65ccb04a34eb8e8be57b1a0e5c744..7d6bf185eae0c5c09efdc803e65ee2d07e47c0f9 100644 (file)
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -119,6 +119,7 @@ typedef struct IscsiTask {
 
 typedef struct IscsiAIOCB {
     BlockAIOCB common;
+    AioContext *ctx;
     QEMUBH *bh;
     IscsiLun *iscsilun;
     struct scsi_task *task;
@@ -173,7 +174,7 @@ iscsi_schedule_bh(IscsiAIOCB *acb)
     if (acb->bh) {
         return;
     }
-    acb->bh = aio_bh_new(acb->iscsilun->aio_context, iscsi_bh_cb, acb);
+    acb->bh = aio_bh_new(acb->ctx, iscsi_bh_cb, acb);
     qemu_bh_schedule(acb->bh);
 }
 
@@ -1012,8 +1013,7 @@ static void iscsi_ioctl_handle_emulated(IscsiAIOCB *acb, int req, void *buf)
         ret = -EINVAL;
     }
     assert(!acb->bh);
-    acb->bh = aio_bh_new(bdrv_get_aio_context(bs),
-                         iscsi_ioctl_bh_completion, acb);
+    acb->bh = aio_bh_new(acb->ctx, iscsi_ioctl_bh_completion, acb);
     acb->ret = ret;
     qemu_bh_schedule(acb->bh);
 }
@@ -1030,6 +1030,7 @@ static BlockAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
     acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
 
     acb->iscsilun = iscsilun;
+    acb->ctx         = qemu_get_current_aio_context();
     acb->bh          = NULL;
     acb->status      = -EINPROGRESS;
     acb->ioh         = buf;