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 21 struct MACAddr { 22 uint8_t a[6]; 23 }; 24 25 /* qdev nic properties */ 26 27 typedef struct NICPeers { 28 NetClientState *ncs[MAX_QUEUE_NUM]; 29 int32_t queues; 30 } NICPeers; 31 32 typedef 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 45 typedef void (NetPoll)(NetClientState *, bool enable); 46 typedef bool (NetCanReceive)(NetClientState *); 47 typedef int (NetStart)(NetClientState *); 48 typedef void (NetStop)(NetClientState *); 49 typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t); 50 typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int); 51 typedef void (NetCleanup) (NetClientState *); 52 typedef void (LinkStatusChanged)(NetClientState *); 53 typedef void (NetClientDestructor)(NetClientState *); 54 typedef RxFilterInfo *(QueryRxFilter)(NetClientState *); 55 typedef bool (HasUfo)(NetClientState *); 56 typedef bool (HasVnetHdr)(NetClientState *); 57 typedef bool (HasVnetHdrLen)(NetClientState *, int); 58 typedef void (UsingVnetHdr)(NetClientState *, bool); 59 typedef void (SetOffload)(NetClientState *, int, int, int, int, int); 60 typedef void (SetVnetHdrLen)(NetClientState *, int); 61 typedef int (SetVnetLE)(NetClientState *, bool); 62 typedef int (SetVnetBE)(NetClientState *, bool); 63 typedef struct SocketReadState SocketReadState; 64 typedef void (SocketReadStateFinalize)(SocketReadState *rs); 65 typedef void (NetAnnounce)(NetClientState *); 66 typedef bool (SetSteeringEBPF)(NetClientState *, int); 67 typedef bool (NetCheckPeerType)(NetClientState *, ObjectClass *, Error **); 68 69 typedef struct NetClientInfo { 70 NetClientDriver type; 71 size_t size; 72 NetReceive *receive; 73 NetReceive *receive_raw; 74 NetReceiveIOV *receive_iov; 75 NetCanReceive *can_receive; 76 NetStart *start; 77 NetStop *stop; 78 NetCleanup *cleanup; 79 LinkStatusChanged *link_status_changed; 80 QueryRxFilter *query_rx_filter; 81 NetPoll *poll; 82 HasUfo *has_ufo; 83 HasVnetHdr *has_vnet_hdr; 84 HasVnetHdrLen *has_vnet_hdr_len; 85 UsingVnetHdr *using_vnet_hdr; 86 SetOffload *set_offload; 87 SetVnetHdrLen *set_vnet_hdr_len; 88 SetVnetLE *set_vnet_le; 89 SetVnetBE *set_vnet_be; 90 NetAnnounce *announce; 91 SetSteeringEBPF *set_steering_ebpf; 92 NetCheckPeerType *check_peer_type; 93 } NetClientInfo; 94 95 struct NetClientState { 96 NetClientInfo *info; 97 int link_down; 98 QTAILQ_ENTRY(NetClientState) next; 99 NetClientState *peer; 100 NetQueue *incoming_queue; 101 char *model; 102 char *name; 103 char info_str[256]; 104 unsigned receive_disabled : 1; 105 NetClientDestructor *destructor; 106 unsigned int queue_index; 107 unsigned rxfilter_notify_enabled:1; 108 int vring_enable; 109 int vnet_hdr_len; 110 bool is_netdev; 111 bool do_not_pad; /* do not pad to the minimum ethernet frame length */ 112 bool is_datapath; 113 QTAILQ_HEAD(, NetFilterState) filters; 114 }; 115 116 typedef struct NICState { 117 NetClientState *ncs; 118 NICConf *conf; 119 void *opaque; 120 bool peer_deleted; 121 } NICState; 122 123 struct SocketReadState { 124 /* 0 = getting length, 1 = getting vnet header length, 2 = getting data */ 125 int state; 126 /* This flag decide whether to read the vnet_hdr_len field */ 127 bool vnet_hdr; 128 uint32_t index; 129 uint32_t packet_len; 130 uint32_t vnet_hdr_len; 131 uint8_t buf[NET_BUFSIZE]; 132 SocketReadStateFinalize *finalize; 133 }; 134 135 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size); 136 char *qemu_mac_strdup_printf(const uint8_t *macaddr); 137 NetClientState *qemu_find_netdev(const char *id); 138 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 139 NetClientDriver type, int max); 140 NetClientState *qemu_new_net_client(NetClientInfo *info, 141 NetClientState *peer, 142 const char *model, 143 const char *name); 144 NetClientState *qemu_new_net_control_client(NetClientInfo *info, 145 NetClientState *peer, 146 const char *model, 147 const char *name); 148 NICState *qemu_new_nic(NetClientInfo *info, 149 NICConf *conf, 150 const char *model, 151 const char *name, 152 void *opaque); 153 void qemu_del_nic(NICState *nic); 154 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index); 155 NetClientState *qemu_get_queue(NICState *nic); 156 NICState *qemu_get_nic(NetClientState *nc); 157 void *qemu_get_nic_opaque(NetClientState *nc); 158 void qemu_del_net_client(NetClientState *nc); 159 typedef void (*qemu_nic_foreach)(NICState *nic, void *opaque); 160 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque); 161 int qemu_can_receive_packet(NetClientState *nc); 162 int qemu_can_send_packet(NetClientState *nc); 163 ssize_t qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, 164 int iovcnt); 165 ssize_t qemu_sendv_packet_async(NetClientState *nc, const struct iovec *iov, 166 int iovcnt, NetPacketSent *sent_cb); 167 ssize_t qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size); 168 ssize_t qemu_receive_packet(NetClientState *nc, const uint8_t *buf, int size); 169 ssize_t qemu_receive_packet_iov(NetClientState *nc, 170 const struct iovec *iov, 171 int iovcnt); 172 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size); 173 ssize_t qemu_send_packet_async(NetClientState *nc, const uint8_t *buf, 174 int size, NetPacketSent *sent_cb); 175 void qemu_purge_queued_packets(NetClientState *nc); 176 void qemu_flush_queued_packets(NetClientState *nc); 177 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge); 178 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]); 179 bool qemu_has_ufo(NetClientState *nc); 180 bool qemu_has_vnet_hdr(NetClientState *nc); 181 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len); 182 void qemu_using_vnet_hdr(NetClientState *nc, bool enable); 183 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, 184 int ecn, int ufo); 185 void qemu_set_vnet_hdr_len(NetClientState *nc, int len); 186 int qemu_set_vnet_le(NetClientState *nc, bool is_le); 187 int qemu_set_vnet_be(NetClientState *nc, bool is_be); 188 void qemu_macaddr_default_if_unset(MACAddr *macaddr); 189 int qemu_show_nic_models(const char *arg, const char *const *models); 190 void qemu_check_nic_model(NICInfo *nd, const char *model); 191 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 192 const char *default_model); 193 194 void print_net_client(Monitor *mon, NetClientState *nc); 195 void hmp_info_network(Monitor *mon, const QDict *qdict); 196 void net_socket_rs_init(SocketReadState *rs, 197 SocketReadStateFinalize *finalize, 198 bool vnet_hdr); 199 NetClientState *qemu_get_peer(NetClientState *nc, int queue_index); 200 201 /* NIC info */ 202 203 #define MAX_NICS 8 204 205 struct NICInfo { 206 MACAddr macaddr; 207 char *model; 208 char *name; 209 char *devaddr; 210 NetClientState *netdev; 211 int used; /* is this slot in nd_table[] being used? */ 212 int instantiated; /* does this NICInfo correspond to an instantiated NIC? */ 213 int nvectors; 214 }; 215 216 extern int nb_nics; 217 extern NICInfo nd_table[MAX_NICS]; 218 extern const char *host_net_devices[]; 219 220 /* from net.c */ 221 int net_client_parse(QemuOptsList *opts_list, const char *str); 222 void show_netdevs(void); 223 int net_init_clients(Error **errp); 224 void net_check_clients(void); 225 void net_cleanup(void); 226 void hmp_host_net_add(Monitor *mon, const QDict *qdict); 227 void hmp_host_net_remove(Monitor *mon, const QDict *qdict); 228 void netdev_add(QemuOpts *opts, Error **errp); 229 230 int net_hub_id_for_client(NetClientState *nc, int *id); 231 NetClientState *net_hub_port_find(int hub_id); 232 233 #define DEFAULT_NETWORK_SCRIPT CONFIG_SYSCONFDIR "/qemu-ifup" 234 #define DEFAULT_NETWORK_DOWN_SCRIPT CONFIG_SYSCONFDIR "/qemu-ifdown" 235 #define DEFAULT_BRIDGE_HELPER CONFIG_QEMU_HELPERDIR "/qemu-bridge-helper" 236 #define DEFAULT_BRIDGE_INTERFACE "br0" 237 238 void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd); 239 240 #define POLYNOMIAL_BE 0x04c11db6 241 #define POLYNOMIAL_LE 0xedb88320 242 uint32_t net_crc32(const uint8_t *p, int len); 243 uint32_t net_crc32_le(const uint8_t *p, int len); 244 245 #define vmstate_offset_macaddr(_state, _field) \ 246 vmstate_offset_array(_state, _field.a, uint8_t, \ 247 sizeof(typeof_field(_state, _field))) 248 249 #define VMSTATE_MACADDR(_field, _state) { \ 250 .name = (stringify(_field)), \ 251 .size = sizeof(MACAddr), \ 252 .info = &vmstate_info_buffer, \ 253 .flags = VMS_BUFFER, \ 254 .offset = vmstate_offset_macaddr(_state, _field), \ 255 } 256 257 static inline bool net_peer_needs_padding(NetClientState *nc) 258 { 259 return nc->peer && !nc->peer->do_not_pad; 260 } 261 262 #endif 263