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When the VM is stopped using the HMP command "stop", soon the handler will stop reading from the vmnet interface. This causes a flood of `VMNET_INTERFACE_PACKETS_AVAILABLE` events to arrive and puts the host CPU at 100%. We fix this by removing the event handler from vmnet when the VM is no longer in a running state and restore it when we return to a running state. Signed-off-by: Joelle van Dyne <j@getutm.app> Signed-off-by: Jason Wang <jasowang@redhat.com>
65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
/*
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* vmnet_int.h
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*
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* Copyright(c) 2022 Vladislav Yaroshchuk <vladislav.yaroshchuk@jetbrains.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef VMNET_INT_H
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#define VMNET_INT_H
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#include "vmnet_int.h"
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#include "clients.h"
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#include <vmnet/vmnet.h>
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#include <dispatch/dispatch.h>
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/**
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* From vmnet.framework documentation
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*
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* Each read/write call allows up to 200 packets to be
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* read or written for a maximum of 256KB.
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*
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* Each packet written should be a complete
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* ethernet frame.
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*
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* https://developer.apple.com/documentation/vmnet
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*/
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#define VMNET_PACKETS_LIMIT 200
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typedef struct VmnetState {
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NetClientState nc;
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interface_ref vmnet_if;
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uint64_t mtu;
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uint64_t max_packet_size;
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dispatch_queue_t if_queue;
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QEMUBH *send_bh;
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struct vmpktdesc packets_buf[VMNET_PACKETS_LIMIT];
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int packets_send_current_pos;
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int packets_send_end_pos;
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struct iovec iov_buf[VMNET_PACKETS_LIMIT];
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VMChangeStateEntry *change;
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} VmnetState;
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const char *vmnet_status_map_str(vmnet_return_t status);
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int vmnet_if_create(NetClientState *nc,
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xpc_object_t if_desc,
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Error **errp);
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ssize_t vmnet_receive_common(NetClientState *nc,
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const uint8_t *buf,
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size_t size);
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void vmnet_cleanup_common(NetClientState *nc);
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#endif /* VMNET_INT_H */
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