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sheepdog: remove unused cancellation support 

SheepdogAIOCB is internal to sheepdog.c, hence it is never canceled.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20161129113245.32724-2-pbonzini@redhat.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
master
Paolo Bonzini 2016-11-29 12:32:41 +01:00 committed by Jeff Cody
parent a0def59428
commit a71264f9f5
1 changed files with 0 additions and 52 deletions
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52
block/sheepdog.c
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@ -347,7 +347,6 @@ struct SheepdogAIOCB {
Coroutine *coroutine;
void (*aio_done_func)(SheepdogAIOCB *);
bool cancelable;
int nr_pending;
uint32_t min_affect_data_idx;
@ -486,7 +485,6 @@ static inline void free_aio_req(BDRVSheepdogState *s, AIOReq *aio_req)
{
SheepdogAIOCB *acb = aio_req->aiocb;
acb->cancelable = false;
QLIST_REMOVE(aio_req, aio_siblings);
g_free(aio_req);
@ -499,57 +497,8 @@ static void coroutine_fn sd_finish_aiocb(SheepdogAIOCB *acb)
qemu_aio_unref(acb);
}
/*
* Check whether the specified acb can be canceled
*
* We can cancel aio when any request belonging to the acb is:
* - Not processed by the sheepdog server.
* - Not linked to the inflight queue.
*/
static bool sd_acb_cancelable(const SheepdogAIOCB *acb)
{
BDRVSheepdogState *s = acb->common.bs->opaque;
AIOReq *aioreq;
if (!acb->cancelable) {
return false;
}
QLIST_FOREACH(aioreq, &s->inflight_aio_head, aio_siblings) {
if (aioreq->aiocb == acb) {
return false;
}
}
return true;
}
static void sd_aio_cancel(BlockAIOCB *blockacb)
{
SheepdogAIOCB *acb = (SheepdogAIOCB *)blockacb;
BDRVSheepdogState *s = acb->common.bs->opaque;
AIOReq *aioreq, *next;
if (sd_acb_cancelable(acb)) {
/* Remove outstanding requests from failed queue. */
QLIST_FOREACH_SAFE(aioreq, &s->failed_aio_head, aio_siblings,
next) {
if (aioreq->aiocb == acb) {
free_aio_req(s, aioreq);
}
}
assert(acb->nr_pending == 0);
if (acb->common.cb) {
acb->common.cb(acb->common.opaque, -ECANCELED);
}
sd_finish_aiocb(acb);
}
}
static const AIOCBInfo sd_aiocb_info = {
.aiocb_size = sizeof(SheepdogAIOCB),
.cancel_async = sd_aio_cancel,
};
static SheepdogAIOCB *sd_aio_setup(BlockDriverState *bs, QEMUIOVector *qiov,
@ -569,7 +518,6 @@ static SheepdogAIOCB *sd_aio_setup(BlockDriverState *bs, QEMUIOVector *qiov,
acb->nb_sectors = nb_sectors;
acb->aio_done_func = NULL;
acb->cancelable = true;
acb->coroutine = qemu_coroutine_self();
acb->ret = 0;
acb->nr_pending = 0;