C++ (Cpp) xpc_send_chctl_local_msgrequest_uv Examples

Example #1

File: xpc_uv.c Project: 020gzh/linux

static void
xpc_handle_notify_mq_msg_uv(struct xpc_partition *part,
			    struct xpc_notify_mq_msg_uv *msg)
{
	struct xpc_partition_uv *part_uv = &part->sn.uv;
	struct xpc_channel *ch;
	struct xpc_channel_uv *ch_uv;
	struct xpc_notify_mq_msg_uv *msg_slot;
	unsigned long irq_flags;
	int ch_number = msg->hdr.ch_number;

	if (unlikely(ch_number >= part->nchannels)) {
		dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid "
			"channel number=0x%x in message from partid=%d\n",
			ch_number, XPC_PARTID(part));

		/* get hb checker to deactivate from the remote partition */
		spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
		if (part_uv->act_state_req == 0)
			xpc_activate_IRQ_rcvd++;
		part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
		part_uv->reason = xpBadChannelNumber;
		spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);

		wake_up_interruptible(&xpc_activate_IRQ_wq);
		return;
	}

	ch = &part->channels[ch_number];
	xpc_msgqueue_ref(ch);

	if (!(ch->flags & XPC_C_CONNECTED)) {
		xpc_msgqueue_deref(ch);
		return;
	}

	/* see if we're really dealing with an ACK for a previously sent msg */
	if (msg->hdr.size == 0) {
		xpc_handle_notify_mq_ack_uv(ch, msg);
		xpc_msgqueue_deref(ch);
		return;
	}

	/* we're dealing with a normal message sent via the notify_mq */
	ch_uv = &ch->sn.uv;

	msg_slot = ch_uv->recv_msg_slots +
	    (msg->hdr.msg_slot_number % ch->remote_nentries) * ch->entry_size;

	BUG_ON(msg_slot->hdr.size != 0);

	memcpy(msg_slot, msg, msg->hdr.size);

	xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next);

	if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) {
		/*
		 * If there is an existing idle kthread get it to deliver
		 * the payload, otherwise we'll have to get the channel mgr
		 * for this partition to create a kthread to do the delivery.
		 */
		if (atomic_read(&ch->kthreads_idle) > 0)
			wake_up_nr(&ch->idle_wq, 1);
		else
			xpc_send_chctl_local_msgrequest_uv(part, ch->number);
	}
	xpc_msgqueue_deref(ch);
}

Example #2

static void
xpc_handle_notify_mq_msg_uv(struct xpc_partition *part,
			    struct xpc_notify_mq_msg_uv *msg)
{
	struct xpc_partition_uv *part_uv = &part->sn.uv;
	struct xpc_channel *ch;
	struct xpc_channel_uv *ch_uv;
	struct xpc_notify_mq_msg_uv *msg_slot;
	unsigned long irq_flags;
	int ch_number = msg->hdr.ch_number;

	if (unlikely(ch_number >= part->nchannels)) {
		dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid "
			"channel number=0x%x in message from partid=%d\n",
			ch_number, XPC_PARTID(part));

		
		spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
		if (part_uv->act_state_req == 0)
			xpc_activate_IRQ_rcvd++;
		part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
		part_uv->reason = xpBadChannelNumber;
		spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);

		wake_up_interruptible(&xpc_activate_IRQ_wq);
		return;
	}

	ch = &part->channels[ch_number];
	xpc_msgqueue_ref(ch);

	if (!(ch->flags & XPC_C_CONNECTED)) {
		xpc_msgqueue_deref(ch);
		return;
	}

	
	if (msg->hdr.size == 0) {
		xpc_handle_notify_mq_ack_uv(ch, msg);
		xpc_msgqueue_deref(ch);
		return;
	}

	
	ch_uv = &ch->sn.uv;

	msg_slot = ch_uv->recv_msg_slots +
	    (msg->hdr.msg_slot_number % ch->remote_nentries) * ch->entry_size;

	BUG_ON(msg->hdr.msg_slot_number != msg_slot->hdr.msg_slot_number);
	BUG_ON(msg_slot->hdr.size != 0);

	memcpy(msg_slot, msg, msg->hdr.size);

	xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next);

	if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) {
		
		if (atomic_read(&ch->kthreads_idle) > 0)
			wake_up_nr(&ch->idle_wq, 1);
		else
			xpc_send_chctl_local_msgrequest_uv(part, ch->number);
	}
	xpc_msgqueue_deref(ch);
}