qemu/include/net/net.h
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   1#ifndef QEMU_NET_H
   2#define QEMU_NET_H
   3
   4#include "qemu/queue.h"
   5#include "qapi/qapi-types-net.h"
   6#include "net/queue.h"
   7#include "hw/qdev-properties-system.h"
   8
   9#define MAC_FMT "%02X:%02X:%02X:%02X:%02X:%02X"
  10#define MAC_ARG(x) ((uint8_t *)(x))[0], ((uint8_t *)(x))[1], \
  11                   ((uint8_t *)(x))[2], ((uint8_t *)(x))[3], \
  12                   ((uint8_t *)(x))[4], ((uint8_t *)(x))[5]
  13
  14#define MAX_QUEUE_NUM 1024
  15
  16/* Maximum GSO packet size (64k) plus plenty of room for
  17 * the ethernet and virtio_net headers
  18 */
  19#define NET_BUFSIZE (4096 + 65536)
  20
  21struct MACAddr {
  22    uint8_t a[6];
  23};
  24
  25/* qdev nic properties */
  26
  27typedef struct NICPeers {
  28    NetClientState *ncs[MAX_QUEUE_NUM];
  29    int32_t queues;
  30} NICPeers;
  31
  32typedef struct NICConf {
  33    MACAddr macaddr;
  34    NICPeers peers;
  35    int32_t bootindex;
  36} NICConf;
  37
  38#define DEFINE_NIC_PROPERTIES(_state, _conf)                            \
  39    DEFINE_PROP_MACADDR("mac",   _state, _conf.macaddr),                \
  40    DEFINE_PROP_NETDEV("netdev", _state, _conf.peers)
  41
  42
  43/* Net clients */
  44
  45typedef void (NetPoll)(NetClientState *, bool enable);
  46typedef bool (NetCanReceive)(NetClientState *);
  47typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t);
  48typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int);
  49typedef void (NetCleanup) (NetClientState *);
  50typedef void (LinkStatusChanged)(NetClientState *);
  51typedef void (NetClientDestructor)(NetClientState *);
  52typedef RxFilterInfo *(QueryRxFilter)(NetClientState *);
  53typedef bool (HasUfo)(NetClientState *);
  54typedef bool (HasVnetHdr)(NetClientState *);
  55typedef bool (HasVnetHdrLen)(NetClientState *, int);
  56typedef void (UsingVnetHdr)(NetClientState *, bool);
  57typedef void (SetOffload)(NetClientState *, int, int, int, int, int);
  58typedef void (SetVnetHdrLen)(NetClientState *, int);
  59typedef int (SetVnetLE)(NetClientState *, bool);
  60typedef int (SetVnetBE)(NetClientState *, bool);
  61typedef struct SocketReadState SocketReadState;
  62typedef void (SocketReadStateFinalize)(SocketReadState *rs);
  63typedef void (NetAnnounce)(NetClientState *);
  64typedef bool (SetSteeringEBPF)(NetClientState *, int);
  65typedef bool (NetCheckPeerType)(NetClientState *, ObjectClass *, Error **);
  66
  67typedef struct NetClientInfo {
  68    NetClientDriver type;
  69    size_t size;
  70    NetReceive *receive;
  71    NetReceive *receive_raw;
  72    NetReceiveIOV *receive_iov;
  73    NetCanReceive *can_receive;
  74    NetCleanup *cleanup;
  75    LinkStatusChanged *link_status_changed;
  76    QueryRxFilter *query_rx_filter;
  77    NetPoll *poll;
  78    HasUfo *has_ufo;
  79    HasVnetHdr *has_vnet_hdr;
  80    HasVnetHdrLen *has_vnet_hdr_len;
  81    UsingVnetHdr *using_vnet_hdr;
  82    SetOffload *set_offload;
  83    SetVnetHdrLen *set_vnet_hdr_len;
  84    SetVnetLE *set_vnet_le;
  85    SetVnetBE *set_vnet_be;
  86    NetAnnounce *announce;
  87    SetSteeringEBPF *set_steering_ebpf;
  88    NetCheckPeerType *check_peer_type;
  89} NetClientInfo;
  90
  91struct NetClientState {
  92    NetClientInfo *info;
  93    int link_down;
  94    QTAILQ_ENTRY(NetClientState) next;
  95    NetClientState *peer;
  96    NetQueue *incoming_queue;
  97    char *model;
  98    char *name;
  99    char info_str[256];
 100    unsigned receive_disabled : 1;
 101    NetClientDestructor *destructor;
 102    unsigned int queue_index;
 103    unsigned rxfilter_notify_enabled:1;
 104    int vring_enable;
 105    int vnet_hdr_len;
 106    bool is_netdev;
 107    bool do_not_pad; /* do not pad to the minimum ethernet frame length */
 108    bool is_datapath;
 109    QTAILQ_HEAD(, NetFilterState) filters;
 110};
 111
 112typedef struct NICState {
 113    NetClientState *ncs;
 114    NICConf *conf;
 115    void *opaque;
 116    bool peer_deleted;
 117} NICState;
 118
 119struct SocketReadState {
 120    /* 0 = getting length, 1 = getting vnet header length, 2 = getting data */
 121    int state;
 122    /* This flag decide whether to read the vnet_hdr_len field */
 123    bool vnet_hdr;
 124    uint32_t index;
 125    uint32_t packet_len;
 126    uint32_t vnet_hdr_len;
 127    uint8_t buf[NET_BUFSIZE];
 128    SocketReadStateFinalize *finalize;
 129};
 130
 131int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size);
 132char *qemu_mac_strdup_printf(const uint8_t *macaddr);
 133NetClientState *qemu_find_netdev(const char *id);
 134int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
 135                                 NetClientDriver type, int max);
 136NetClientState *qemu_new_net_client(NetClientInfo *info,
 137                                    NetClientState *peer,
 138                                    const char *model,
 139                                    const char *name);
 140NetClientState *qemu_new_net_control_client(NetClientInfo *info,
 141                                        NetClientState *peer,
 142                                        const char *model,
 143                                        const char *name);
 144NICState *qemu_new_nic(NetClientInfo *info,
 145                       NICConf *conf,
 146                       const char *model,
 147                       const char *name,
 148                       void *opaque);
 149void qemu_del_nic(NICState *nic);
 150NetClientState *qemu_get_subqueue(NICState *nic, int queue_index);
 151NetClientState *qemu_get_queue(NICState *nic);
 152NICState *qemu_get_nic(NetClientState *nc);
 153void *qemu_get_nic_opaque(NetClientState *nc);
 154void qemu_del_net_client(NetClientState *nc);
 155typedef void (*qemu_nic_foreach)(NICState *nic, void *opaque);
 156void qemu_foreach_nic(qemu_nic_foreach func, void *opaque);
 157int qemu_can_receive_packet(NetClientState *nc);
 158int qemu_can_send_packet(NetClientState *nc);
 159ssize_t qemu_sendv_packet(NetClientState *nc, const struct iovec *iov,
 160                          int iovcnt);
 161ssize_t qemu_sendv_packet_async(NetClientState *nc, const struct iovec *iov,
 162                                int iovcnt, NetPacketSent *sent_cb);
 163ssize_t qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size);
 164ssize_t qemu_receive_packet(NetClientState *nc, const uint8_t *buf, int size);
 165ssize_t qemu_receive_packet_iov(NetClientState *nc,
 166                                const struct iovec *iov,
 167                                int iovcnt);
 168ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size);
 169ssize_t qemu_send_packet_async(NetClientState *nc, const uint8_t *buf,
 170                               int size, NetPacketSent *sent_cb);
 171void qemu_purge_queued_packets(NetClientState *nc);
 172void qemu_flush_queued_packets(NetClientState *nc);
 173void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge);
 174void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]);
 175bool qemu_has_ufo(NetClientState *nc);
 176bool qemu_has_vnet_hdr(NetClientState *nc);
 177bool qemu_has_vnet_hdr_len(NetClientState *nc, int len);
 178void qemu_using_vnet_hdr(NetClientState *nc, bool enable);
 179void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
 180                      int ecn, int ufo);
 181void qemu_set_vnet_hdr_len(NetClientState *nc, int len);
 182int qemu_set_vnet_le(NetClientState *nc, bool is_le);
 183int qemu_set_vnet_be(NetClientState *nc, bool is_be);
 184void qemu_macaddr_default_if_unset(MACAddr *macaddr);
 185int qemu_show_nic_models(const char *arg, const char *const *models);
 186void qemu_check_nic_model(NICInfo *nd, const char *model);
 187int qemu_find_nic_model(NICInfo *nd, const char * const *models,
 188                        const char *default_model);
 189
 190void print_net_client(Monitor *mon, NetClientState *nc);
 191void hmp_info_network(Monitor *mon, const QDict *qdict);
 192void net_socket_rs_init(SocketReadState *rs,
 193                        SocketReadStateFinalize *finalize,
 194                        bool vnet_hdr);
 195NetClientState *qemu_get_peer(NetClientState *nc, int queue_index);
 196
 197/* NIC info */
 198
 199#define MAX_NICS 8
 200
 201struct NICInfo {
 202    MACAddr macaddr;
 203    char *model;
 204    char *name;
 205    char *devaddr;
 206    NetClientState *netdev;
 207    int used;         /* is this slot in nd_table[] being used? */
 208    int instantiated; /* does this NICInfo correspond to an instantiated NIC? */
 209    int nvectors;
 210};
 211
 212extern int nb_nics;
 213extern NICInfo nd_table[MAX_NICS];
 214extern const char *host_net_devices[];
 215
 216/* from net.c */
 217int net_client_parse(QemuOptsList *opts_list, const char *str);
 218void show_netdevs(void);
 219int net_init_clients(Error **errp);
 220void net_check_clients(void);
 221void net_cleanup(void);
 222void hmp_host_net_add(Monitor *mon, const QDict *qdict);
 223void hmp_host_net_remove(Monitor *mon, const QDict *qdict);
 224void netdev_add(QemuOpts *opts, Error **errp);
 225
 226int net_hub_id_for_client(NetClientState *nc, int *id);
 227NetClientState *net_hub_port_find(int hub_id);
 228
 229#define DEFAULT_NETWORK_SCRIPT CONFIG_SYSCONFDIR "/qemu-ifup"
 230#define DEFAULT_NETWORK_DOWN_SCRIPT CONFIG_SYSCONFDIR "/qemu-ifdown"
 231#define DEFAULT_BRIDGE_HELPER CONFIG_QEMU_HELPERDIR "/qemu-bridge-helper"
 232#define DEFAULT_BRIDGE_INTERFACE "br0"
 233
 234void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd);
 235
 236#define POLYNOMIAL_BE 0x04c11db6
 237#define POLYNOMIAL_LE 0xedb88320
 238uint32_t net_crc32(const uint8_t *p, int len);
 239uint32_t net_crc32_le(const uint8_t *p, int len);
 240
 241#define vmstate_offset_macaddr(_state, _field)                       \
 242    vmstate_offset_array(_state, _field.a, uint8_t,                \
 243                         sizeof(typeof_field(_state, _field)))
 244
 245#define VMSTATE_MACADDR(_field, _state) {                            \
 246    .name       = (stringify(_field)),                               \
 247    .size       = sizeof(MACAddr),                                   \
 248    .info       = &vmstate_info_buffer,                              \
 249    .flags      = VMS_BUFFER,                                        \
 250    .offset     = vmstate_offset_macaddr(_state, _field),            \
 251}
 252
 253static inline bool net_peer_needs_padding(NetClientState *nc)
 254{
 255  return nc->peer && !nc->peer->do_not_pad;
 256}
 257
 258#endif
 259
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