qemu/net/vmnet_int.h
Joelle van Dyne 993f71ee33 vmnet: stop recieving events when VM is stopped
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>
2023-02-17 13:31:33 +08:00

65 lines
1.4 KiB
C

/*
* vmnet_int.h
*
* Copyright(c) 2022 Vladislav Yaroshchuk <vladislav.yaroshchuk@jetbrains.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#ifndef VMNET_INT_H
#define VMNET_INT_H
#include "vmnet_int.h"
#include "clients.h"
#include <vmnet/vmnet.h>
#include <dispatch/dispatch.h>
/**
* From vmnet.framework documentation
*
* Each read/write call allows up to 200 packets to be
* read or written for a maximum of 256KB.
*
* Each packet written should be a complete
* ethernet frame.
*
* https://developer.apple.com/documentation/vmnet
*/
#define VMNET_PACKETS_LIMIT 200
typedef struct VmnetState {
NetClientState nc;
interface_ref vmnet_if;
uint64_t mtu;
uint64_t max_packet_size;
dispatch_queue_t if_queue;
QEMUBH *send_bh;
struct vmpktdesc packets_buf[VMNET_PACKETS_LIMIT];
int packets_send_current_pos;
int packets_send_end_pos;
struct iovec iov_buf[VMNET_PACKETS_LIMIT];
VMChangeStateEntry *change;
} VmnetState;
const char *vmnet_status_map_str(vmnet_return_t status);
int vmnet_if_create(NetClientState *nc,
xpc_object_t if_desc,
Error **errp);
ssize_t vmnet_receive_common(NetClientState *nc,
const uint8_t *buf,
size_t size);
void vmnet_cleanup_common(NetClientState *nc);
#endif /* VMNET_INT_H */