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FRET-qemu/include/net/net.h
David Woodhouse e8c5c4525c net: make nb_nics and nd_table[] static in net/net.c 
Also remove the stale declaration of host_net_devices; the actual
definition was removed long ago in commit 7cc28cb06104 ("net: Remove
the deprecated 'host_net_add' and 'host_net_remove' HMP commands")

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Thomas Huth <thuth@redhat.com>
2024-02-02 16:23:48 +00:00

350 lines
14 KiB
C
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#ifndef QEMU_NET_H
#define QEMU_NET_H
#include "qemu/queue.h"
#include "qapi/qapi-types-net.h"
#include "net/queue.h"
#include "hw/qdev-properties-system.h"
#define MAC_FMT "%02X:%02X:%02X:%02X:%02X:%02X"
#define MAC_ARG(x) ((uint8_t *)(x))[0], ((uint8_t *)(x))[1], \
((uint8_t *)(x))[2], ((uint8_t *)(x))[3], \
((uint8_t *)(x))[4], ((uint8_t *)(x))[5]
#define MAX_QUEUE_NUM 1024
/* Maximum GSO packet size (64k) plus plenty of room for
* the ethernet and virtio_net headers
*/
#define NET_BUFSIZE (4096 + 65536)
struct MACAddr {
uint8_t a[6];
};
/* qdev nic properties */
typedef struct NICPeers {
NetClientState *ncs[MAX_QUEUE_NUM];
int32_t queues;
} NICPeers;
typedef struct NICConf {
MACAddr macaddr;
NICPeers peers;
int32_t bootindex;
} NICConf;
#define DEFINE_NIC_PROPERTIES(_state, _conf) \
DEFINE_PROP_MACADDR("mac", _state, _conf.macaddr), \
DEFINE_PROP_NETDEV("netdev", _state, _conf.peers)
/* Net clients */
typedef void (NetPoll)(NetClientState *, bool enable);
typedef bool (NetCanReceive)(NetClientState *);
typedef int (NetStart)(NetClientState *);
typedef int (NetLoad)(NetClientState *);
typedef void (NetStop)(NetClientState *);
typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t);
typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int);
typedef void (NetCleanup) (NetClientState *);
typedef void (LinkStatusChanged)(NetClientState *);
typedef void (NetClientDestructor)(NetClientState *);
typedef RxFilterInfo *(QueryRxFilter)(NetClientState *);
typedef bool (HasUfo)(NetClientState *);
typedef bool (HasUso)(NetClientState *);
typedef bool (HasVnetHdr)(NetClientState *);
typedef bool (HasVnetHdrLen)(NetClientState *, int);
typedef bool (GetUsingVnetHdr)(NetClientState *);
typedef void (UsingVnetHdr)(NetClientState *, bool);
typedef void (SetOffload)(NetClientState *, int, int, int, int, int, int, int);
typedef int (GetVnetHdrLen)(NetClientState *);
typedef void (SetVnetHdrLen)(NetClientState *, int);
typedef int (SetVnetLE)(NetClientState *, bool);
typedef int (SetVnetBE)(NetClientState *, bool);
typedef struct SocketReadState SocketReadState;
typedef void (SocketReadStateFinalize)(SocketReadState *rs);
typedef void (NetAnnounce)(NetClientState *);
typedef bool (SetSteeringEBPF)(NetClientState *, int);
typedef bool (NetCheckPeerType)(NetClientState *, ObjectClass *, Error **);
typedef struct NetClientInfo {
NetClientDriver type;
size_t size;
NetReceive *receive;
NetReceive *receive_raw;
NetReceiveIOV *receive_iov;
NetCanReceive *can_receive;
NetStart *start;
NetLoad *load;
NetStop *stop;
NetCleanup *cleanup;
LinkStatusChanged *link_status_changed;
QueryRxFilter *query_rx_filter;
NetPoll *poll;
HasUfo *has_ufo;
HasUso *has_uso;
HasVnetHdr *has_vnet_hdr;
HasVnetHdrLen *has_vnet_hdr_len;
GetUsingVnetHdr *get_using_vnet_hdr;
UsingVnetHdr *using_vnet_hdr;
SetOffload *set_offload;
GetVnetHdrLen *get_vnet_hdr_len;
SetVnetHdrLen *set_vnet_hdr_len;
SetVnetLE *set_vnet_le;
SetVnetBE *set_vnet_be;
NetAnnounce *announce;
SetSteeringEBPF *set_steering_ebpf;
NetCheckPeerType *check_peer_type;
} NetClientInfo;
struct NetClientState {
NetClientInfo *info;
int link_down;
QTAILQ_ENTRY(NetClientState) next;
NetClientState *peer;
NetQueue *incoming_queue;
char *model;
char *name;
char info_str[256];
unsigned receive_disabled : 1;
NetClientDestructor *destructor;
unsigned int queue_index;
unsigned rxfilter_notify_enabled:1;
int vring_enable;
int vnet_hdr_len;
bool is_netdev;
bool do_not_pad; /* do not pad to the minimum ethernet frame length */
bool is_datapath;
QTAILQ_HEAD(, NetFilterState) filters;
};
typedef QTAILQ_HEAD(NetClientStateList, NetClientState) NetClientStateList;
typedef struct NICState {
NetClientState *ncs;
NICConf *conf;
MemReentrancyGuard *reentrancy_guard;
void *opaque;
bool peer_deleted;
} NICState;
struct SocketReadState {
/* 0 = getting length, 1 = getting vnet header length, 2 = getting data */
int state;
/* This flag decide whether to read the vnet_hdr_len field */
bool vnet_hdr;
uint32_t index;
uint32_t packet_len;
uint32_t vnet_hdr_len;
uint8_t buf[NET_BUFSIZE];
SocketReadStateFinalize *finalize;
};
int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size);
char *qemu_mac_strdup_printf(const uint8_t *macaddr);
NetClientState *qemu_find_netdev(const char *id);
int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
NetClientDriver type, int max);
NetClientState *qemu_new_net_client(NetClientInfo *info,
NetClientState *peer,
const char *model,
const char *name);
NetClientState *qemu_new_net_control_client(NetClientInfo *info,
NetClientState *peer,
const char *model,
const char *name);
NICState *qemu_new_nic(NetClientInfo *info,
NICConf *conf,
const char *model,
const char *name,
MemReentrancyGuard *reentrancy_guard,
void *opaque);
void qemu_del_nic(NICState *nic);
NetClientState *qemu_get_subqueue(NICState *nic, int queue_index);
NetClientState *qemu_get_queue(NICState *nic);
NICState *qemu_get_nic(NetClientState *nc);
void *qemu_get_nic_opaque(NetClientState *nc);
void qemu_del_net_client(NetClientState *nc);
typedef void (*qemu_nic_foreach)(NICState *nic, void *opaque);
void qemu_foreach_nic(qemu_nic_foreach func, void *opaque);
int qemu_can_receive_packet(NetClientState *nc);
int qemu_can_send_packet(NetClientState *nc);
ssize_t qemu_sendv_packet(NetClientState *nc, const struct iovec *iov,
int iovcnt);
ssize_t qemu_sendv_packet_async(NetClientState *nc, const struct iovec *iov,
int iovcnt, NetPacketSent *sent_cb);
ssize_t qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size);
ssize_t qemu_receive_packet(NetClientState *nc, const uint8_t *buf, int size);
ssize_t qemu_receive_packet_iov(NetClientState *nc,
const struct iovec *iov,
int iovcnt);
ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size);
ssize_t qemu_send_packet_async(NetClientState *nc, const uint8_t *buf,
int size, NetPacketSent *sent_cb);
void qemu_purge_queued_packets(NetClientState *nc);
void qemu_flush_queued_packets(NetClientState *nc);
void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge);
void qemu_set_info_str(NetClientState *nc,
const char *fmt, ...) G_GNUC_PRINTF(2, 3);
void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]);
bool qemu_has_ufo(NetClientState *nc);
bool qemu_has_uso(NetClientState *nc);
bool qemu_has_vnet_hdr(NetClientState *nc);
bool qemu_has_vnet_hdr_len(NetClientState *nc, int len);
bool qemu_get_using_vnet_hdr(NetClientState *nc);
void qemu_using_vnet_hdr(NetClientState *nc, bool enable);
void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
int ecn, int ufo, int uso4, int uso6);
int qemu_get_vnet_hdr_len(NetClientState *nc);
void qemu_set_vnet_hdr_len(NetClientState *nc, int len);
int qemu_set_vnet_le(NetClientState *nc, bool is_le);
int qemu_set_vnet_be(NetClientState *nc, bool is_be);
void qemu_macaddr_default_if_unset(MACAddr *macaddr);
/**
* qemu_find_nic_info: Obtain NIC configuration information
* @typename: Name of device object type
* @match_default: Match NIC configurations with no model specified
* @alias: Additional model string to match (for user convenience and
* backward compatibility).
*
* Search for a NIC configuration matching the NIC model constraints.
*/
NICInfo *qemu_find_nic_info(const char *typename, bool match_default,
const char *alias);
/**
* qemu_configure_nic_device: Apply NIC configuration to a given device
* @dev: Network device to be configured
* @match_default: Match NIC configurations with no model specified
* @alias: Additional model string to match
*
* Search for a NIC configuration for the provided device, using the
* additionally specified matching constraints. If found, apply the
* configuration using qdev_set_nic_properties() and return %true.
*
* This is used by platform code which creates the device anyway,
* regardless of whether there is a configuration for it. This tends
* to be platforms which ignore `--nodefaults` and create net devices
* anyway, for example because the Ethernet device on that board is
* always physically present.
*/
bool qemu_configure_nic_device(DeviceState *dev, bool match_default,
const char *alias);
/**
* qemu_create_nic_device: Create a NIC device if a configuration exists for it
* @typename: Object typename of network device
* @match_default: Match NIC configurations with no model specified
* @alias: Additional model string to match
*
* Search for a NIC configuration for the provided device type. If found,
* create an object of the corresponding type and return it.
*/
DeviceState *qemu_create_nic_device(const char *typename, bool match_default,
const char *alias);
/*
* qemu_create_nic_bus_devices: Create configured NIC devices for a given bus
* @bus: Bus on which to create devices
* @parent_type: Object type for devices to be created (e.g. TYPE_PCI_DEVICE)
* @default_model: Object type name for default NIC model (or %NULL)
* @alias: Additional model string to replace, for user convenience
* @alias_target: Actual object type name to be used in place of @alias
*
* Instantiate dynamic NICs on a given bus, typically a PCI bus. This scans
* for available NIC configurations which either specify a model which is
* a child type of @parent_type, or which do not specify a model when
* @default_model is non-NULL. Each device is instantiated on the given @bus.
*
* A single substitution is supported, e.g. "xen" → "xen-net-device" for the
* Xen bus, or "virtio" → "virtio-net-pci" for PCI. This allows the user to
* specify a more understandable "model=" parameter on the command line, not
* only the real object typename.
*/
void qemu_create_nic_bus_devices(BusState *bus, const char *parent_type,
const char *default_model,
const char *alias, const char *alias_target);
void print_net_client(Monitor *mon, NetClientState *nc);
void net_socket_rs_init(SocketReadState *rs,
SocketReadStateFinalize *finalize,
bool vnet_hdr);
NetClientState *qemu_get_peer(NetClientState *nc, int queue_index);
/**
* qemu_get_nic_models:
* @device_type: Defines which devices should be taken into consideration
* (e.g. TYPE_DEVICE for all devices, or TYPE_PCI_DEVICE for PCI)
*
* Get an array of pointers to names of NIC devices that are available in
* the QEMU binary. The array is terminated with a NULL pointer entry.
* The caller is responsible for freeing the memory when it is not required
* anymore, e.g. with g_ptr_array_free(..., true).
*
* Returns: Pointer to the array that contains the pointers to the names.
*/
GPtrArray *qemu_get_nic_models(const char *device_type);
/* NIC info */
#define MAX_NICS 8
struct NICInfo {
MACAddr macaddr;
char *model;
char *name;
char *devaddr;
NetClientState *netdev;
int used; /* is this slot in nd_table[] being used? */
int instantiated; /* does this NICInfo correspond to an instantiated NIC? */
int nvectors;
};
/* from net.c */
extern NetClientStateList net_clients;
bool netdev_is_modern(const char *optstr);
void netdev_parse_modern(const char *optstr);
void net_client_parse(QemuOptsList *opts_list, const char *optstr);
void show_netdevs(void);
void net_init_clients(void);
void net_check_clients(void);
void net_cleanup(void);
void hmp_host_net_add(Monitor *mon, const QDict *qdict);
void hmp_host_net_remove(Monitor *mon, const QDict *qdict);
void netdev_add(QemuOpts *opts, Error **errp);
int net_hub_id_for_client(NetClientState *nc, int *id);
NetClientState *net_hub_port_find(int hub_id);
#define DEFAULT_NETWORK_SCRIPT CONFIG_SYSCONFDIR "/qemu-ifup"
#define DEFAULT_NETWORK_DOWN_SCRIPT CONFIG_SYSCONFDIR "/qemu-ifdown"
#define DEFAULT_BRIDGE_HELPER CONFIG_QEMU_HELPERDIR "/qemu-bridge-helper"
#define DEFAULT_BRIDGE_INTERFACE "br0"
void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd);
#define POLYNOMIAL_BE 0x04c11db6
#define POLYNOMIAL_LE 0xedb88320
uint32_t net_crc32(const uint8_t *p, int len);
uint32_t net_crc32_le(const uint8_t *p, int len);
#define vmstate_offset_macaddr(_state, _field) \
vmstate_offset_array(_state, _field.a, uint8_t, \
sizeof(typeof_field(_state, _field)))
#define VMSTATE_MACADDR(_field, _state) { \
.name = (stringify(_field)), \
.size = sizeof(MACAddr), \
.info = &vmstate_info_buffer, \
.flags = VMS_BUFFER, \
.offset = vmstate_offset_macaddr(_state, _field), \
}
static inline bool net_peer_needs_padding(NetClientState *nc)
{
return nc->peer && !nc->peer->do_not_pad;
}
#endif
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