qemu/net.h
Michael S. Tsirkin a083a89d72 net: delay freeing peer host device
With -netdev, virtio devices present offload
features to guest, depending on the backend used.
Thus, removing host netdev peer while guest is
active leads to guest-visible inconsistency and/or crashes.

As a solution, while guest (NIC) peer device exists,
we prevent the host peer from being deleted.
This patch does this by adding peer_deleted flag in nic state:
if host device is going away while guest device
is around, set this flag and keep a shell of
the host device around for as long as guest device exists.

The link is put down so all packets will get discarded.

At the moment, management can detect that device deletion
is delayed by doing info net. As a next step, we shall add
commands that control hotplug/unplug without
removing the device, and an event to report that
guest has responded to the hotplug event.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
2010-10-06 18:24:37 +02:00

183 lines
5.7 KiB
C

#ifndef QEMU_NET_H
#define QEMU_NET_H
#include "qemu-queue.h"
#include "qemu-common.h"
#include "qdict.h"
#include "qemu-option.h"
#include "net/queue.h"
struct MACAddr {
uint8_t a[6];
};
/* qdev nic properties */
typedef struct NICConf {
MACAddr macaddr;
VLANState *vlan;
VLANClientState *peer;
} NICConf;
#define DEFINE_NIC_PROPERTIES(_state, _conf) \
DEFINE_PROP_MACADDR("mac", _state, _conf.macaddr), \
DEFINE_PROP_VLAN("vlan", _state, _conf.vlan), \
DEFINE_PROP_NETDEV("netdev", _state, _conf.peer)
/* VLANs support */
typedef enum {
NET_CLIENT_TYPE_NONE,
NET_CLIENT_TYPE_NIC,
NET_CLIENT_TYPE_SLIRP,
NET_CLIENT_TYPE_TAP,
NET_CLIENT_TYPE_SOCKET,
NET_CLIENT_TYPE_VDE,
NET_CLIENT_TYPE_DUMP
} net_client_type;
typedef void (NetPoll)(VLANClientState *, bool enable);
typedef int (NetCanReceive)(VLANClientState *);
typedef ssize_t (NetReceive)(VLANClientState *, const uint8_t *, size_t);
typedef ssize_t (NetReceiveIOV)(VLANClientState *, const struct iovec *, int);
typedef void (NetCleanup) (VLANClientState *);
typedef void (LinkStatusChanged)(VLANClientState *);
typedef struct NetClientInfo {
net_client_type type;
size_t size;
NetReceive *receive;
NetReceive *receive_raw;
NetReceiveIOV *receive_iov;
NetCanReceive *can_receive;
NetCleanup *cleanup;
LinkStatusChanged *link_status_changed;
NetPoll *poll;
} NetClientInfo;
struct VLANClientState {
NetClientInfo *info;
int link_down;
QTAILQ_ENTRY(VLANClientState) next;
struct VLANState *vlan;
VLANClientState *peer;
NetQueue *send_queue;
char *model;
char *name;
char info_str[256];
unsigned receive_disabled : 1;
};
typedef struct NICState {
VLANClientState nc;
NICConf *conf;
void *opaque;
bool peer_deleted;
} NICState;
struct VLANState {
int id;
QTAILQ_HEAD(, VLANClientState) clients;
QTAILQ_ENTRY(VLANState) next;
NetQueue *send_queue;
};
VLANState *qemu_find_vlan(int id, int allocate);
VLANClientState *qemu_find_netdev(const char *id);
VLANClientState *qemu_new_net_client(NetClientInfo *info,
VLANState *vlan,
VLANClientState *peer,
const char *model,
const char *name);
NICState *qemu_new_nic(NetClientInfo *info,
NICConf *conf,
const char *model,
const char *name,
void *opaque);
void qemu_del_vlan_client(VLANClientState *vc);
VLANClientState *qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
const char *client_str);
typedef void (*qemu_nic_foreach)(NICState *nic, void *opaque);
void qemu_foreach_nic(qemu_nic_foreach func, void *opaque);
int qemu_can_send_packet(VLANClientState *vc);
ssize_t qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov,
int iovcnt);
ssize_t qemu_sendv_packet_async(VLANClientState *vc, const struct iovec *iov,
int iovcnt, NetPacketSent *sent_cb);
void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size);
ssize_t qemu_send_packet_raw(VLANClientState *vc, const uint8_t *buf, int size);
ssize_t qemu_send_packet_async(VLANClientState *vc, const uint8_t *buf,
int size, NetPacketSent *sent_cb);
void qemu_purge_queued_packets(VLANClientState *vc);
void qemu_flush_queued_packets(VLANClientState *vc);
void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6]);
void qemu_macaddr_default_if_unset(MACAddr *macaddr);
int qemu_show_nic_models(const char *arg, const char *const *models);
void qemu_check_nic_model(NICInfo *nd, const char *model);
int qemu_find_nic_model(NICInfo *nd, const char * const *models,
const char *default_model);
void do_info_network(Monitor *mon);
int do_set_link(Monitor *mon, const QDict *qdict, QObject **ret_data);
/* NIC info */
#define MAX_NICS 8
struct NICInfo {
uint8_t macaddr[6];
char *model;
char *name;
char *devaddr;
VLANState *vlan;
VLANClientState *netdev;
int used;
int nvectors;
};
extern int nb_nics;
extern NICInfo nd_table[MAX_NICS];
extern int default_net;
/* BT HCI info */
struct HCIInfo {
int (*bdaddr_set)(struct HCIInfo *hci, const uint8_t *bd_addr);
void (*cmd_send)(struct HCIInfo *hci, const uint8_t *data, int len);
void (*sco_send)(struct HCIInfo *hci, const uint8_t *data, int len);
void (*acl_send)(struct HCIInfo *hci, const uint8_t *data, int len);
void *opaque;
void (*evt_recv)(void *opaque, const uint8_t *data, int len);
void (*acl_recv)(void *opaque, const uint8_t *data, int len);
};
struct HCIInfo *qemu_next_hci(void);
/* from net.c */
extern const char *legacy_tftp_prefix;
extern const char *legacy_bootp_filename;
int net_client_init(Monitor *mon, QemuOpts *opts, int is_netdev);
int net_client_parse(QemuOptsList *opts_list, const char *str);
int net_init_clients(void);
void net_check_clients(void);
void net_cleanup(void);
void net_host_device_add(Monitor *mon, const QDict *qdict);
void net_host_device_remove(Monitor *mon, const QDict *qdict);
int do_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret_data);
int do_netdev_del(Monitor *mon, const QDict *qdict, QObject **ret_data);
#define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
#define DEFAULT_NETWORK_DOWN_SCRIPT "/etc/qemu-ifdown"
#ifdef __sun__
#define SMBD_COMMAND "/usr/sfw/sbin/smbd"
#else
#define SMBD_COMMAND "/usr/sbin/smbd"
#endif
void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd);
int net_handle_fd_param(Monitor *mon, const char *param);
#endif