static int xen_9pfs_free(struct XenLegacyDevice *xendev)
{
Xen9pfsDev *xen_9pdev = container_of(xendev, Xen9pfsDev, xendev);
int i;
if (xen_9pdev->rings[0].evtchndev != NULL) {
xen_9pfs_disconnect(xendev);
}
for (i = 0; i < xen_9pdev->num_rings; i++) {
if (xen_9pdev->rings[i].data != NULL) {
xen_be_unmap_grant_refs(&xen_9pdev->xendev,
xen_9pdev->rings[i].data,
(1 << xen_9pdev->rings[i].ring_order));
}
if (xen_9pdev->rings[i].intf != NULL) {
xen_be_unmap_grant_refs(&xen_9pdev->xendev,
xen_9pdev->rings[i].intf,
1);
}
if (xen_9pdev->rings[i].bh != NULL) {
qemu_bh_delete(xen_9pdev->rings[i].bh);
}
}
g_free(xen_9pdev->id);
g_free(xen_9pdev->tag);
g_free(xen_9pdev->path);
g_free(xen_9pdev->security_model);
g_free(xen_9pdev->rings);
return 0;
}
static void migrate_fd_cleanup(void *opaque)
{
MigrationState *s = opaque;
qemu_bh_delete(s->cleanup_bh);
s->cleanup_bh = NULL;
if (s->file) {
DPRINTF("closing file\n");
qemu_mutex_unlock_iothread();
qemu_thread_join(&s->thread);
qemu_mutex_lock_iothread();
qemu_fclose(s->file);
s->file = NULL;
}
assert(s->state != MIG_STATE_ACTIVE);
if (s->state != MIG_STATE_COMPLETED) {
qemu_savevm_state_cancel();
if (s->state == MIG_STATE_CANCELLING) {
migrate_set_state(s, MIG_STATE_CANCELLING, MIG_STATE_CANCELLED);
}
}
notifier_list_notify(&migration_state_notifiers, s);
}
void laio_detach_aio_context(void *s_, AioContext *old_context)
{
struct qemu_laio_state *s = s_;
aio_set_event_notifier(old_context, &s->e, NULL);
qemu_bh_delete(s->completion_bh);
}
static void iscsi_co_generic_bh_cb(void *opaque)
{
struct IscsiTask *iTask = opaque;
iTask->complete = 1;
qemu_bh_delete(iTask->bh);
qemu_coroutine_enter(iTask->co, NULL);
}
static void reschedule_dma(void *opaque)
{
DMAAIOCB *dbs = (DMAAIOCB *)opaque;
qemu_bh_delete(dbs->bh);
dbs->bh = NULL;
dma_blk_cb(dbs, 0);
}
static void qemu_gluster_complete_aio(void *opaque)
{
GlusterAIOCB *acb = (GlusterAIOCB *)opaque;
qemu_bh_delete(acb->bh);
acb->bh = NULL;
qemu_coroutine_enter(acb->coroutine, NULL);
}
/* This callback gets invoked when we have pure sparseness */
static void tar_sparse_cb(void *opaque)
{
TarAIOCB *acb = (TarAIOCB *)opaque;
acb->common.cb(acb->common.opaque, 0);
qemu_bh_delete(acb->bh);
qemu_aio_release(acb);
}
static void bh_delete_cb(void *opaque)
{
BHTestData *data = opaque;
if (++data->n < data->max) {
qemu_bh_schedule(data->bh);
} else {
qemu_bh_delete(data->bh);
data->bh = NULL;
}
}
static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOBlock *s = to_virtio_blk(vdev);
VirtIOBlockReq *req;
MultiReqBuffer mrb = {
.num_writes = 0,
};
while ((req = virtio_blk_get_request(s))) {
virtio_blk_handle_request(req, &mrb);
}
virtio_submit_multiwrite(s->bs, &mrb);
/*
* FIXME: Want to check for completions before returning to guest mode,
* so cached reads and writes are reported as quickly as possible. But
* that should be done in the generic block layer.
*/
}
static void virtio_blk_dma_restart_bh(void *opaque)
{
VirtIOBlock *s = opaque;
VirtIOBlockReq *req = s->rq;
MultiReqBuffer mrb = {
.num_writes = 0,
};
qemu_bh_delete(s->bh);
s->bh = NULL;
s->rq = NULL;
while (req) {
virtio_blk_handle_request(req, &mrb);
req = req->next;
}
virtio_submit_multiwrite(s->bs, &mrb);
}
static void virtio_blk_dma_restart_cb(void *opaque, int running,
RunState state)
{
VirtIOBlock *s = opaque;
if (!running)
return;
if (!s->bh) {
s->bh = qemu_bh_new(virtio_blk_dma_restart_bh, s);
qemu_bh_schedule(s->bh);
}
}
static void curl_readv_bh_cb(void *p)
{
CURLState *state;
CURLAIOCB *acb = p;
BDRVCURLState *s = acb->common.bs->opaque;
qemu_bh_delete(acb->bh);
acb->bh = NULL;
size_t start = acb->sector_num * SECTOR_SIZE;
size_t end;
// In case we have the requested data already (e.g. read-ahead),
// we can just call the callback and be done.
switch (curl_find_buf(s, start, acb->nb_sectors * SECTOR_SIZE, acb)) {
case FIND_RET_OK:
qemu_aio_release(acb);
// fall through
case FIND_RET_WAIT:
return;
default:
break;
}
// No cache found, so let's start a new request
state = curl_init_state(s);
if (!state) {
acb->common.cb(acb->common.opaque, -EIO);
qemu_aio_release(acb);
return;
}
acb->start = 0;
acb->end = (acb->nb_sectors * SECTOR_SIZE);
state->buf_off = 0;
if (state->orig_buf)
g_free(state->orig_buf);
state->buf_start = start;
state->buf_len = acb->end + s->readahead_size;
end = MIN(start + state->buf_len, s->len) - 1;
state->orig_buf = g_malloc(state->buf_len);
state->acb[0] = acb;
snprintf(state->range, 127, "%zd-%zd", start, end);
DPRINTF("CURL (AIO): Reading %d at %zd (%s)\n",
(acb->nb_sectors * SECTOR_SIZE), start, state->range);
curl_easy_setopt(state->curl, CURLOPT_RANGE, state->range);
curl_multi_add_handle(s->multi, state->curl);
curl_multi_do(s);
}
/* Context: QEMU global mutex held */
void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s)
{
if (!s) {
return;
}
virtio_blk_data_plane_stop(s);
qemu_bh_delete(s->bh);
object_unref(OBJECT(s->iothread));
g_free(s);
}
static void
qlooper_destroy(Looper* ll)
{
QLooper* looper = (QLooper*)ll;
QLoopIo* io;
while ((io = looper->io_list) != NULL)
qloopio_free(io);
qemu_bh_delete(looper->io_bh);
qemu_free(looper);
}
static void
iscsi_readv_writev_bh_cb(void *p)
{
IscsiAIOCB *acb = p;
qemu_bh_delete(acb->bh);
if (acb->canceled == 0) {
acb->common.cb(acb->common.opaque, acb->status);
}
qemu_aio_release(acb);
}
/* Context: QEMU global mutex held */
void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s)
{
if (!s) {
return;
}
virtio_blk_data_plane_stop(s);
blk_op_unblock_all(s->conf->conf.blk, s->blocker);
error_free(s->blocker);
qemu_bh_delete(s->bh);
object_unref(OBJECT(s->iothread));
g_free(s);
}
static void virtio_balloon_device_unrealize(DeviceState *dev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtIOBalloon *s = VIRTIO_BALLOON(dev);
if (virtio_balloon_free_page_support(s)) {
qemu_bh_delete(s->free_page_bh);
virtio_balloon_free_page_stop(s);
precopy_remove_notifier(&s->free_page_report_notify);
}
balloon_stats_destroy_timer(s);
qemu_remove_balloon_handler(s);
virtio_cleanup(vdev);
}
static void rbd_aio_bh_cb(void *opaque)
{
RBDAIOCB *acb = opaque;
if (acb->cmd == RBD_AIO_READ) {
qemu_iovec_from_buf(acb->qiov, 0, acb->bounce, acb->qiov->size);
}
qemu_vfree(acb->bounce);
acb->common.cb(acb->common.opaque, (acb->ret > 0 ? 0 : acb->ret));
qemu_bh_delete(acb->bh);
acb->bh = NULL;
qemu_aio_release(acb);
}
static void qemu_archipelago_complete_aio(void *opaque)
{
AIORequestData *reqdata = (AIORequestData *) opaque;
ArchipelagoAIOCB *aio_cb = (ArchipelagoAIOCB *) reqdata->aio_cb;
qemu_bh_delete(aio_cb->bh);
aio_cb->common.cb(aio_cb->common.opaque, aio_cb->ret);
aio_cb->status = 0;
if (!aio_cb->cancelled) {
qemu_aio_release(aio_cb);
}
g_free(reqdata);
}
/* Context: QEMU global mutex held */
void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s)
{
if (!s) {
return;
}
virtio_blk_data_plane_stop(s);
data_plane_remove_op_blockers(s);
notifier_remove(&s->insert_notifier);
notifier_remove(&s->remove_notifier);
qemu_bh_delete(s->bh);
object_unref(OBJECT(s->iothread));
g_free(s);
}
static void dma_aio_cancel(BlockAIOCB *acb)
{
DMAAIOCB *dbs = container_of(acb, DMAAIOCB, common);
trace_dma_aio_cancel(dbs);
if (dbs->acb) {
blk_aio_cancel_async(dbs->acb);
}
if (dbs->bh) {
cpu_unregister_map_client(dbs->bh);
qemu_bh_delete(dbs->bh);
dbs->bh = NULL;
}
}
static void dma_complete(DMAAIOCB *dbs, int ret)
{
trace_dma_complete(dbs, ret, dbs->common.cb);
dma_blk_unmap(dbs);
if (dbs->common.cb) {
dbs->common.cb(dbs->common.opaque, ret);
}
qemu_iovec_destroy(&dbs->iov);
if (dbs->bh) {
qemu_bh_delete(dbs->bh);
dbs->bh = NULL;
}
qemu_aio_unref(dbs);
}
static void blkverify_aio_bh(void *opaque)
{
BlkverifyAIOCB *acb = opaque;
qemu_bh_delete(acb->bh);
if (acb->buf) {
qemu_iovec_destroy(&acb->raw_qiov);
qemu_vfree(acb->buf);
}
acb->common.cb(acb->common.opaque, acb->ret);
if (acb->finished) {
*acb->finished = true;
}
qemu_aio_release(acb);
}
static void colo_failover_bh(void *opaque)
{
int old_state;
qemu_bh_delete(failover_bh);
failover_bh = NULL;
old_state = failover_set_state(FAILOVER_STATUS_REQUIRE,
FAILOVER_STATUS_ACTIVE);
if (old_state != FAILOVER_STATUS_REQUIRE) {
error_report("Unknown error for failover, old_state = %s",
FailoverStatus_lookup[old_state]);
return;
}
colo_do_failover(NULL);
}
static void vigs_device_exit(PCIDevice *dev)
{
VIGSState *s = DO_UPCAST(VIGSState, dev.pci_dev, dev);
vigs_server_destroy(s->server);
qemu_bh_delete(s->fence_ack_bh);
vigs_fenceman_destroy(s->fenceman);
memory_region_destroy(&s->io_bar);
memory_region_destroy(&s->ram_bar);
memory_region_destroy(&s->vram_bar);
VIGS_LOG_INFO("VIGS deinitialized");
vigs_log_cleanup();
}
static void
iscsi_bh_cb(void *p)
{
IscsiAIOCB *acb = p;
qemu_bh_delete(acb->bh);
if (acb->canceled == 0) {
acb->common.cb(acb->common.opaque, acb->status);
}
if (acb->task != NULL) {
scsi_free_scsi_task(acb->task);
acb->task = NULL;
}
qemu_aio_release(acb);
}
static void dma_complete(DMAAIOCB *dbs, int ret)
{
dma_bdrv_unmap(dbs);
if (dbs->common.cb) {
dbs->common.cb(dbs->common.opaque, ret);
}
qemu_iovec_destroy(&dbs->iov);
if (dbs->bh) {
qemu_bh_delete(dbs->bh);
dbs->bh = NULL;
}
if (!dbs->in_cancel) {
/* Requests may complete while dma_aio_cancel is in progress. In
* this case, the AIOCB should not be released because it is still
* referenced by dma_aio_cancel. */
qemu_aio_release(dbs);
}
}
static void virtio_crypto_device_unrealize(DeviceState *dev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev);
VirtIOCryptoQueue *q;
int i, max_queues;
max_queues = vcrypto->multiqueue ? vcrypto->max_queues : 1;
for (i = 0; i < max_queues; i++) {
virtio_del_queue(vdev, i);
q = &vcrypto->vqs[i];
qemu_bh_delete(q->dataq_bh);
}
g_free(vcrypto->vqs);
virtio_cleanup(vdev);
cryptodev_backend_set_used(vcrypto->cryptodev, false);
}
static void
iscsi_bh_cb(void *p)
{
IscsiAIOCB *acb = p;
qemu_bh_delete(acb->bh);
g_free(acb->buf);
acb->buf = NULL;
acb->common.cb(acb->common.opaque, acb->status);
if (acb->task != NULL) {
scsi_free_scsi_task(acb->task);
acb->task = NULL;
}
qemu_aio_unref(acb);
}
static int blk_free(struct XenDevice *xendev)
{
struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev);
struct ioreq *ioreq;
while (!QLIST_EMPTY(&blkdev->freelist)) {
ioreq = QLIST_FIRST(&blkdev->freelist);
QLIST_REMOVE(ioreq, list);
qemu_iovec_destroy(&ioreq->v);
qemu_free(ioreq);
}
qemu_free(blkdev->params);
qemu_free(blkdev->mode);
qemu_free(blkdev->type);
qemu_free(blkdev->dev);
qemu_free(blkdev->devtype);
qemu_bh_delete(blkdev->bh);
return 0;
}
static void block_job_defer_to_main_loop_bh(void *opaque)
{
BlockJobDeferToMainLoopData *data = opaque;
AioContext *aio_context;
qemu_bh_delete(data->bh);
/* Prevent race with block_job_defer_to_main_loop() */
aio_context_acquire(data->aio_context);
/* Fetch BDS AioContext again, in case it has changed */
aio_context = bdrv_get_aio_context(data->job->bs);
aio_context_acquire(aio_context);
data->fn(data->job, data->opaque);
aio_context_release(aio_context);
aio_context_release(data->aio_context);
g_free(data);
}
void xen_block_dataplane_destroy(XenBlockDataPlane *dataplane)
{
XenBlockRequest *request;
if (!dataplane) {
return;
}
while (!QLIST_EMPTY(&dataplane->freelist)) {
request = QLIST_FIRST(&dataplane->freelist);
QLIST_REMOVE(request, list);
qemu_iovec_destroy(&request->v);
qemu_vfree(request->buf);
g_free(request);
}
qemu_bh_delete(dataplane->bh);
if (dataplane->iothread) {
object_unref(OBJECT(dataplane->iothread));
}
g_free(dataplane);
}
