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 int (NetStart)(NetClientState *);
  48typedef int (NetLoad)(NetClientState *);
  49typedef void (NetStop)(NetClientState *);
  50typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t);
  51typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int);
  52typedef void (NetCleanup) (NetClientState *);
  53typedef void (LinkStatusChanged)(NetClientState *);
  54typedef void (NetClientDestructor)(NetClientState *);
  55typedef RxFilterInfo *(QueryRxFilter)(NetClientState *);
  56typedef bool (HasUfo)(NetClientState *);
  57typedef bool (HasVnetHdr)(NetClientState *);
  58typedef bool (HasVnetHdrLen)(NetClientState *, int);
  59typedef void (UsingVnetHdr)(NetClientState *, bool);
  60typedef void (SetOffload)(NetClientState *, int, int, int, int, int);
  61typedef void (SetVnetHdrLen)(NetClientState *, int);
  62typedef int (SetVnetLE)(NetClientState *, bool);
  63typedef int (SetVnetBE)(NetClientState *, bool);
  64typedef struct SocketReadState SocketReadState;
  65typedef void (SocketReadStateFinalize)(SocketReadState *rs);
  66typedef void (NetAnnounce)(NetClientState *);
  67typedef bool (SetSteeringEBPF)(NetClientState *, int);
  68typedef bool (NetCheckPeerType)(NetClientState *, ObjectClass *, Error **);
  69
  70typedef struct NetClientInfo {
  71    NetClientDriver type;
  72    size_t size;
  73    NetReceive *receive;
  74    NetReceive *receive_raw;
  75    NetReceiveIOV *receive_iov;
  76    NetCanReceive *can_receive;
  77    NetStart *start;
  78    NetLoad *load;
  79    NetStop *stop;
  80    NetCleanup *cleanup;
  81    LinkStatusChanged *link_status_changed;
  82    QueryRxFilter *query_rx_filter;
  83    NetPoll *poll;
  84    HasUfo *has_ufo;
  85    HasVnetHdr *has_vnet_hdr;
  86    HasVnetHdrLen *has_vnet_hdr_len;
  87    UsingVnetHdr *using_vnet_hdr;
  88    SetOffload *set_offload;
  89    SetVnetHdrLen *set_vnet_hdr_len;
  90    SetVnetLE *set_vnet_le;
  91    SetVnetBE *set_vnet_be;
  92    NetAnnounce *announce;
  93    SetSteeringEBPF *set_steering_ebpf;
  94    NetCheckPeerType *check_peer_type;
  95} NetClientInfo;
  96
  97struct NetClientState {
  98    NetClientInfo *info;
  99    int link_down;
 100    QTAILQ_ENTRY(NetClientState) next;
 101    NetClientState *peer;
 102    NetQueue *incoming_queue;
 103    char *model;
 104    char *name;
 105    char info_str[256];
 106    unsigned receive_disabled : 1;
 107    NetClientDestructor *destructor;
 108    unsigned int queue_index;
 109    unsigned rxfilter_notify_enabled:1;
 110    int vring_enable;
 111    int vnet_hdr_len;
 112    bool is_netdev;
 113    bool do_not_pad; /* do not pad to the minimum ethernet frame length */
 114    bool is_datapath;
 115    QTAILQ_HEAD(, NetFilterState) filters;
 116};
 117
 118typedef struct NICState {
 119    NetClientState *ncs;
 120    NICConf *conf;
 121    void *opaque;
 122    bool peer_deleted;
 123} NICState;
 124
 125struct SocketReadState {
 126    /* 0 = getting length, 1 = getting vnet header length, 2 = getting data */
 127    int state;
 128    /* This flag decide whether to read the vnet_hdr_len field */
 129    bool vnet_hdr;
 130    uint32_t index;
 131    uint32_t packet_len;
 132    uint32_t vnet_hdr_len;
 133    uint8_t buf[NET_BUFSIZE];
 134    SocketReadStateFinalize *finalize;
 135};
 136
 137int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size);
 138char *qemu_mac_strdup_printf(const uint8_t *macaddr);
 139NetClientState *qemu_find_netdev(const char *id);
 140int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
 141                                 NetClientDriver type, int max);
 142NetClientState *qemu_new_net_client(NetClientInfo *info,
 143                                    NetClientState *peer,
 144                                    const char *model,
 145                                    const char *name);
 146NetClientState *qemu_new_net_control_client(NetClientInfo *info,
 147                                        NetClientState *peer,
 148                                        const char *model,
 149                                        const char *name);
 150NICState *qemu_new_nic(NetClientInfo *info,
 151                       NICConf *conf,
 152                       const char *model,
 153                       const char *name,
 154                       void *opaque);
 155void qemu_del_nic(NICState *nic);
 156NetClientState *qemu_get_subqueue(NICState *nic, int queue_index);
 157NetClientState *qemu_get_queue(NICState *nic);
 158NICState *qemu_get_nic(NetClientState *nc);
 159void *qemu_get_nic_opaque(NetClientState *nc);
 160void qemu_del_net_client(NetClientState *nc);
 161typedef void (*qemu_nic_foreach)(NICState *nic, void *opaque);
 162void qemu_foreach_nic(qemu_nic_foreach func, void *opaque);
 163int qemu_can_receive_packet(NetClientState *nc);
 164int qemu_can_send_packet(NetClientState *nc);
 165ssize_t qemu_sendv_packet(NetClientState *nc, const struct iovec *iov,
 166                          int iovcnt);
 167ssize_t qemu_sendv_packet_async(NetClientState *nc, const struct iovec *iov,
 168                                int iovcnt, NetPacketSent *sent_cb);
 169ssize_t qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size);
 170ssize_t qemu_receive_packet(NetClientState *nc, const uint8_t *buf, int size);
 171ssize_t qemu_receive_packet_iov(NetClientState *nc,
 172                                const struct iovec *iov,
 173                                int iovcnt);
 174ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size);
 175ssize_t qemu_send_packet_async(NetClientState *nc, const uint8_t *buf,
 176                               int size, NetPacketSent *sent_cb);
 177void qemu_purge_queued_packets(NetClientState *nc);
 178void qemu_flush_queued_packets(NetClientState *nc);
 179void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge);
 180void qemu_set_info_str(NetClientState *nc,
 181                       const char *fmt, ...) G_GNUC_PRINTF(2, 3);
 182void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]);
 183bool qemu_has_ufo(NetClientState *nc);
 184bool qemu_has_vnet_hdr(NetClientState *nc);
 185bool qemu_has_vnet_hdr_len(NetClientState *nc, int len);
 186void qemu_using_vnet_hdr(NetClientState *nc, bool enable);
 187void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
 188                      int ecn, int ufo);
 189void qemu_set_vnet_hdr_len(NetClientState *nc, int len);
 190int qemu_set_vnet_le(NetClientState *nc, bool is_le);
 191int qemu_set_vnet_be(NetClientState *nc, bool is_be);
 192void qemu_macaddr_default_if_unset(MACAddr *macaddr);
 193int qemu_show_nic_models(const char *arg, const char *const *models);
 194void qemu_check_nic_model(NICInfo *nd, const char *model);
 195int qemu_find_nic_model(NICInfo *nd, const char * const *models,
 196                        const char *default_model);
 197
 198void print_net_client(Monitor *mon, NetClientState *nc);
 199void hmp_info_network(Monitor *mon, const QDict *qdict);
 200void net_socket_rs_init(SocketReadState *rs,
 201                        SocketReadStateFinalize *finalize,
 202                        bool vnet_hdr);
 203NetClientState *qemu_get_peer(NetClientState *nc, int queue_index);
 204
 205/* NIC info */
 206
 207#define MAX_NICS 8
 208
 209struct NICInfo {
 210    MACAddr macaddr;
 211    char *model;
 212    char *name;
 213    char *devaddr;
 214    NetClientState *netdev;
 215    int used;         /* is this slot in nd_table[] being used? */
 216    int instantiated; /* does this NICInfo correspond to an instantiated NIC? */
 217    int nvectors;
 218};
 219
 220extern int nb_nics;
 221extern NICInfo nd_table[MAX_NICS];
 222extern const char *host_net_devices[];
 223
 224/* from net.c */
 225bool netdev_is_modern(const char *optarg);
 226void netdev_parse_modern(const char *optarg);
 227void net_client_parse(QemuOptsList *opts_list, const char *str);
 228void show_netdevs(void);
 229void net_init_clients(void);
 230void net_check_clients(void);
 231void net_cleanup(void);
 232void hmp_host_net_add(Monitor *mon, const QDict *qdict);
 233void hmp_host_net_remove(Monitor *mon, const QDict *qdict);
 234void netdev_add(QemuOpts *opts, Error **errp);
 235
 236int net_hub_id_for_client(NetClientState *nc, int *id);
 237NetClientState *net_hub_port_find(int hub_id);
 238
 239#define DEFAULT_NETWORK_SCRIPT CONFIG_SYSCONFDIR "/qemu-ifup"
 240#define DEFAULT_NETWORK_DOWN_SCRIPT CONFIG_SYSCONFDIR "/qemu-ifdown"
 241#define DEFAULT_BRIDGE_HELPER CONFIG_QEMU_HELPERDIR "/qemu-bridge-helper"
 242#define DEFAULT_BRIDGE_INTERFACE "br0"
 243
 244void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd);
 245
 246#define POLYNOMIAL_BE 0x04c11db6
 247#define POLYNOMIAL_LE 0xedb88320
 248uint32_t net_crc32(const uint8_t *p, int len);
 249uint32_t net_crc32_le(const uint8_t *p, int len);
 250
 251#define vmstate_offset_macaddr(_state, _field)                       \
 252    vmstate_offset_array(_state, _field.a, uint8_t,                \
 253                         sizeof(typeof_field(_state, _field)))
 254
 255#define VMSTATE_MACADDR(_field, _state) {                            \
 256    .name       = (stringify(_field)),                               \
 257    .size       = sizeof(MACAddr),                                   \
 258    .info       = &vmstate_info_buffer,                              \
 259    .flags      = VMS_BUFFER,                                        \
 260    .offset     = vmstate_offset_macaddr(_state, _field),            \
 261}
 262
 263static inline bool net_peer_needs_padding(NetClientState *nc)
 264{
 265  return nc->peer && !nc->peer->do_not_pad;
 266}
 267
 268#endif
 269
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