include/net/net.h

   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
   8 #define MAC_FMT "%02X:%02X:%02X:%02X:%02X:%02X"
   9 #define MAC_ARG(x) ((uint8_t *)(x))[0], ((uint8_t *)(x))[1], \
  10                    ((uint8_t *)(x))[2], ((uint8_t *)(x))[3], \
  11                    ((uint8_t *)(x))[4], ((uint8_t *)(x))[5]
  12
  13 #define MAX_QUEUE_NUM 1024
  14
  15 /* Maximum GSO packet size (64k) plus plenty of room for
  16  * the ethernet and virtio_net headers
  17  */
  18 #define NET_BUFSIZE (4096 + 65536)
  19
  20 struct MACAddr {
  21     uint8_t a[6];
  22 };
  23
  24 /* qdev nic properties */
  25
  26 typedef struct NICPeers {
  27     NetClientState *ncs[MAX_QUEUE_NUM];
  28     int32_t queues;
  29 } NICPeers;
  30
  31 typedef struct NICConf {
  32     MACAddr macaddr;
  33     NICPeers peers;
  34     int32_t bootindex;
  35 } NICConf;
  36
  37 #define DEFINE_NIC_PROPERTIES(_state, _conf)                            \
  38     DEFINE_PROP_MACADDR("mac",   _state, _conf.macaddr),                \
  39     DEFINE_PROP_NETDEV("netdev", _state, _conf.peers)
  40
  41
  42 /* Net clients */
  43
  44 typedef void (NetPoll)(NetClientState *, bool enable);
  45 typedef bool (NetCanReceive)(NetClientState *);
  46 typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t);
  47 typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int);
  48 typedef void (NetCleanup) (NetClientState *);
  49 typedef void (LinkStatusChanged)(NetClientState *);
  50 typedef void (NetClientDestructor)(NetClientState *);
  51 typedef RxFilterInfo *(QueryRxFilter)(NetClientState *);
  52 typedef bool (HasUfo)(NetClientState *);
  53 typedef bool (HasVnetHdr)(NetClientState *);
  54 typedef bool (HasVnetHdrLen)(NetClientState *, int);
  55 typedef void (UsingVnetHdr)(NetClientState *, bool);
  56 typedef void (SetOffload)(NetClientState *, int, int, int, int, int);
  57 typedef void (SetVnetHdrLen)(NetClientState *, int);
  58 typedef int (SetVnetLE)(NetClientState *, bool);
  59 typedef int (SetVnetBE)(NetClientState *, bool);
  60 typedef struct SocketReadState SocketReadState;
  61 typedef void (SocketReadStateFinalize)(SocketReadState *rs);
  62 typedef void (NetAnnounce)(NetClientState *);
  63
  64 typedef struct NetClientInfo {
  65     NetClientDriver type;
  66     size_t size;
  67     NetReceive *receive;
  68     NetReceive *receive_raw;
  69     NetReceiveIOV *receive_iov;
  70     NetCanReceive *can_receive;
  71     NetCleanup *cleanup;
  72     LinkStatusChanged *link_status_changed;
  73     QueryRxFilter *query_rx_filter;
  74     NetPoll *poll;
  75     HasUfo *has_ufo;
  76     HasVnetHdr *has_vnet_hdr;
  77     HasVnetHdrLen *has_vnet_hdr_len;
  78     UsingVnetHdr *using_vnet_hdr;
  79     SetOffload *set_offload;
  80     SetVnetHdrLen *set_vnet_hdr_len;
  81     SetVnetLE *set_vnet_le;
  82     SetVnetBE *set_vnet_be;
  83     NetAnnounce *announce;
  84 } NetClientInfo;
  85
  86 struct NetClientState {
  87     NetClientInfo *info;
  88     int link_down;
  89     QTAILQ_ENTRY(NetClientState) next;
  90     NetClientState *peer;
  91     NetQueue *incoming_queue;
  92     char *model;
  93     char *name;
  94     char info_str[256];
  95     unsigned receive_disabled : 1;
  96     NetClientDestructor *destructor;
  97     unsigned int queue_index;
  98     unsigned rxfilter_notify_enabled:1;
  99     int vring_enable;
 100     int vnet_hdr_len;
 101     bool is_netdev;
 102     QTAILQ_HEAD(, NetFilterState) filters;
 103 };
 104
 105 typedef struct NICState {
 106     NetClientState *ncs;
 107     NICConf *conf;
 108     void *opaque;
 109     bool peer_deleted;
 110 } NICState;
 111
 112 struct SocketReadState {
 113     /* 0 = getting length, 1 = getting vnet header length, 2 = getting data */
 114     int state;
 115     /* This flag decide whether to read the vnet_hdr_len field */
 116     bool vnet_hdr;
 117     uint32_t index;
 118     uint32_t packet_len;
 119     uint32_t vnet_hdr_len;
 120     uint8_t buf[NET_BUFSIZE];
 121     SocketReadStateFinalize *finalize;
 122 };
 123
 124 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size);
 125 char *qemu_mac_strdup_printf(const uint8_t *macaddr);
 126 NetClientState *qemu_find_netdev(const char *id);
 127 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
 128                                  NetClientDriver type, int max);
 129 NetClientState *qemu_new_net_client(NetClientInfo *info,
 130                                     NetClientState *peer,
 131                                     const char *model,
 132                                     const char *name);
 133 NICState *qemu_new_nic(NetClientInfo *info,
 134                        NICConf *conf,
 135                        const char *model,
 136                        const char *name,
 137                        void *opaque);
 138 void qemu_del_nic(NICState *nic);
 139 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index);
 140 NetClientState *qemu_get_queue(NICState *nic);
 141 NICState *qemu_get_nic(NetClientState *nc);
 142 void *qemu_get_nic_opaque(NetClientState *nc);
 143 void qemu_del_net_client(NetClientState *nc);
 144 typedef void (*qemu_nic_foreach)(NICState *nic, void *opaque);
 145 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque);
 146 int qemu_can_send_packet(NetClientState *nc);
 147 ssize_t qemu_sendv_packet(NetClientState *nc, const struct iovec *iov,
 148                           int iovcnt);
 149 ssize_t qemu_sendv_packet_async(NetClientState *nc, const struct iovec *iov,
 150                                 int iovcnt, NetPacketSent *sent_cb);
 151 ssize_t qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size);
 152 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size);
 153 ssize_t qemu_send_packet_async(NetClientState *nc, const uint8_t *buf,
 154                                int size, NetPacketSent *sent_cb);
 155 void qemu_purge_queued_packets(NetClientState *nc);
 156 void qemu_flush_queued_packets(NetClientState *nc);
 157 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge);
 158 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]);
 159 bool qemu_has_ufo(NetClientState *nc);
 160 bool qemu_has_vnet_hdr(NetClientState *nc);
 161 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len);
 162 void qemu_using_vnet_hdr(NetClientState *nc, bool enable);
 163 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
 164                       int ecn, int ufo);
 165 void qemu_set_vnet_hdr_len(NetClientState *nc, int len);
 166 int qemu_set_vnet_le(NetClientState *nc, bool is_le);
 167 int qemu_set_vnet_be(NetClientState *nc, bool is_be);
 168 void qemu_macaddr_default_if_unset(MACAddr *macaddr);
 169 int qemu_show_nic_models(const char *arg, const char *const *models);
 170 void qemu_check_nic_model(NICInfo *nd, const char *model);
 171 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
 172                         const char *default_model);
 173
 174 void print_net_client(Monitor *mon, NetClientState *nc);
 175 void hmp_info_network(Monitor *mon, const QDict *qdict);
 176 void net_socket_rs_init(SocketReadState *rs,
 177                         SocketReadStateFinalize *finalize,
 178                         bool vnet_hdr);
 179 NetClientState *qemu_get_peer(NetClientState *nc, int queue_index);
 180
 181 /* NIC info */
 182
 183 #define MAX_NICS 8
 184
 185 struct NICInfo {
 186     MACAddr macaddr;
 187     char *model;
 188     char *name;
 189     char *devaddr;
 190     NetClientState *netdev;
 191     int used;         /* is this slot in nd_table[] being used? */
 192     int instantiated; /* does this NICInfo correspond to an instantiated NIC? */
 193     int nvectors;
 194 };
 195
 196 extern int nb_nics;
 197 extern NICInfo nd_table[MAX_NICS];
 198 extern const char *host_net_devices[];
 199
 200 /* from net.c */
 201 int net_client_parse(QemuOptsList *opts_list, const char *str);
 202 int net_init_clients(Error **errp);
 203 void net_check_clients(void);
 204 void net_cleanup(void);
 205 void hmp_host_net_add(Monitor *mon, const QDict *qdict);
 206 void hmp_host_net_remove(Monitor *mon, const QDict *qdict);
 207 void netdev_add(QemuOpts *opts, Error **errp);
 208
 209 int net_hub_id_for_client(NetClientState *nc, int *id);
 210 NetClientState *net_hub_port_find(int hub_id);
 211
 212 #define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
 213 #define DEFAULT_NETWORK_DOWN_SCRIPT "/etc/qemu-ifdown"
 214 #define DEFAULT_BRIDGE_HELPER CONFIG_QEMU_HELPERDIR "/qemu-bridge-helper"
 215 #define DEFAULT_BRIDGE_INTERFACE "br0"
 216
 217 void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd);
 218
 219 #define POLYNOMIAL_BE 0x04c11db6
 220 #define POLYNOMIAL_LE 0xedb88320
 221 uint32_t net_crc32(const uint8_t *p, int len);
 222 uint32_t net_crc32_le(const uint8_t *p, int len);
 223
 224 #define vmstate_offset_macaddr(_state, _field)                       \
 225     vmstate_offset_array(_state, _field.a, uint8_t,                \
 226                          sizeof(typeof_field(_state, _field)))
 227
 228 #define VMSTATE_MACADDR(_field, _state) {                            \
 229     .name       = (stringify(_field)),                               \
 230     .size       = sizeof(MACAddr),                                   \
 231     .info       = &vmstate_info_buffer,                              \
 232     .flags      = VMS_BUFFER,                                        \
 233     .offset     = vmstate_offset_macaddr(_state, _field),            \
 234 }
 235
 236 #endif