1 #ifndef QEMU_NET_H 2 #define QEMU_NET_H 3 4 #include "qemu/queue.h" 5 #include "qapi-types.h" 6 #include "net/queue.h" 7 #include "migration/vmstate.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_VLAN("vlan", _state, _conf.peers), \ 41 DEFINE_PROP_NETDEV("netdev", _state, _conf.peers) 42 43 44 /* Net clients */ 45 46 typedef void (NetPoll)(NetClientState *, bool enable); 47 typedef int (NetCanReceive)(NetClientState *); 48 typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t); 49 typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int); 50 typedef void (NetCleanup) (NetClientState *); 51 typedef void (LinkStatusChanged)(NetClientState *); 52 typedef void (NetClientDestructor)(NetClientState *); 53 typedef RxFilterInfo *(QueryRxFilter)(NetClientState *); 54 typedef bool (HasUfo)(NetClientState *); 55 typedef bool (HasVnetHdr)(NetClientState *); 56 typedef bool (HasVnetHdrLen)(NetClientState *, int); 57 typedef void (UsingVnetHdr)(NetClientState *, bool); 58 typedef void (SetOffload)(NetClientState *, int, int, int, int, int); 59 typedef void (SetVnetHdrLen)(NetClientState *, int); 60 typedef int (SetVnetLE)(NetClientState *, bool); 61 typedef int (SetVnetBE)(NetClientState *, bool); 62 typedef struct SocketReadState SocketReadState; 63 typedef void (SocketReadStateFinalize)(SocketReadState *rs); 64 65 typedef struct NetClientInfo { 66 NetClientDriver type; 67 size_t size; 68 NetReceive *receive; 69 NetReceive *receive_raw; 70 NetReceiveIOV *receive_iov; 71 NetCanReceive *can_receive; 72 NetCleanup *cleanup; 73 LinkStatusChanged *link_status_changed; 74 QueryRxFilter *query_rx_filter; 75 NetPoll *poll; 76 HasUfo *has_ufo; 77 HasVnetHdr *has_vnet_hdr; 78 HasVnetHdrLen *has_vnet_hdr_len; 79 UsingVnetHdr *using_vnet_hdr; 80 SetOffload *set_offload; 81 SetVnetHdrLen *set_vnet_hdr_len; 82 SetVnetLE *set_vnet_le; 83 SetVnetBE *set_vnet_be; 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 QTAILQ_HEAD(NetFilterHead, NetFilterState) filters; 102 }; 103 104 typedef struct NICState { 105 NetClientState *ncs; 106 NICConf *conf; 107 void *opaque; 108 bool peer_deleted; 109 } NICState; 110 111 struct SocketReadState { 112 /* 0 = getting length, 1 = getting vnet header length, 2 = getting data */ 113 int state; 114 /* This flag decide whether to read the vnet_hdr_len field */ 115 bool vnet_hdr; 116 uint32_t index; 117 uint32_t packet_len; 118 uint32_t vnet_hdr_len; 119 uint8_t buf[NET_BUFSIZE]; 120 SocketReadStateFinalize *finalize; 121 }; 122 123 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size); 124 char *qemu_mac_strdup_printf(const uint8_t *macaddr); 125 NetClientState *qemu_find_netdev(const char *id); 126 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 127 NetClientDriver type, int max); 128 NetClientState *qemu_new_net_client(NetClientInfo *info, 129 NetClientState *peer, 130 const char *model, 131 const char *name); 132 NICState *qemu_new_nic(NetClientInfo *info, 133 NICConf *conf, 134 const char *model, 135 const char *name, 136 void *opaque); 137 void qemu_del_nic(NICState *nic); 138 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index); 139 NetClientState *qemu_get_queue(NICState *nic); 140 NICState *qemu_get_nic(NetClientState *nc); 141 void *qemu_get_nic_opaque(NetClientState *nc); 142 void qemu_del_net_client(NetClientState *nc); 143 typedef void (*qemu_nic_foreach)(NICState *nic, void *opaque); 144 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque); 145 int qemu_can_send_packet(NetClientState *nc); 146 ssize_t qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, 147 int iovcnt); 148 ssize_t qemu_sendv_packet_async(NetClientState *nc, const struct iovec *iov, 149 int iovcnt, NetPacketSent *sent_cb); 150 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size); 151 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size); 152 ssize_t qemu_send_packet_async(NetClientState *nc, const uint8_t *buf, 153 int size, NetPacketSent *sent_cb); 154 void qemu_purge_queued_packets(NetClientState *nc); 155 void qemu_flush_queued_packets(NetClientState *nc); 156 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]); 157 bool qemu_has_ufo(NetClientState *nc); 158 bool qemu_has_vnet_hdr(NetClientState *nc); 159 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len); 160 void qemu_using_vnet_hdr(NetClientState *nc, bool enable); 161 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, 162 int ecn, int ufo); 163 void qemu_set_vnet_hdr_len(NetClientState *nc, int len); 164 int qemu_set_vnet_le(NetClientState *nc, bool is_le); 165 int qemu_set_vnet_be(NetClientState *nc, bool is_be); 166 void qemu_macaddr_default_if_unset(MACAddr *macaddr); 167 int qemu_show_nic_models(const char *arg, const char *const *models); 168 void qemu_check_nic_model(NICInfo *nd, const char *model); 169 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 170 const char *default_model); 171 172 ssize_t qemu_deliver_packet_iov(NetClientState *sender, 173 unsigned flags, 174 const struct iovec *iov, 175 int iovcnt, 176 void *opaque); 177 178 void print_net_client(Monitor *mon, NetClientState *nc); 179 void hmp_info_network(Monitor *mon, const QDict *qdict); 180 void net_socket_rs_init(SocketReadState *rs, 181 SocketReadStateFinalize *finalize, 182 bool vnet_hdr); 183 184 /* NIC info */ 185 186 #define MAX_NICS 8 187 188 struct NICInfo { 189 MACAddr macaddr; 190 char *model; 191 char *name; 192 char *devaddr; 193 NetClientState *netdev; 194 int used; /* is this slot in nd_table[] being used? */ 195 int instantiated; /* does this NICInfo correspond to an instantiated NIC? */ 196 int nvectors; 197 }; 198 199 extern int nb_nics; 200 extern NICInfo nd_table[MAX_NICS]; 201 extern const char *host_net_devices[]; 202 203 /* from net.c */ 204 extern const char *legacy_tftp_prefix; 205 extern const char *legacy_bootp_filename; 206 207 int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp); 208 int net_client_parse(QemuOptsList *opts_list, const char *str); 209 int net_init_clients(void); 210 void net_check_clients(void); 211 void net_cleanup(void); 212 void hmp_host_net_add(Monitor *mon, const QDict *qdict); 213 void hmp_host_net_remove(Monitor *mon, const QDict *qdict); 214 void netdev_add(QemuOpts *opts, Error **errp); 215 void qmp_netdev_add(QDict *qdict, QObject **ret, Error **errp); 216 217 int net_hub_id_for_client(NetClientState *nc, int *id); 218 NetClientState *net_hub_port_find(int hub_id); 219 220 #define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup" 221 #define DEFAULT_NETWORK_DOWN_SCRIPT "/etc/qemu-ifdown" 222 #define DEFAULT_BRIDGE_HELPER CONFIG_QEMU_HELPERDIR "/qemu-bridge-helper" 223 #define DEFAULT_BRIDGE_INTERFACE "br0" 224 225 void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd); 226 227 #define POLYNOMIAL_BE 0x04c11db6 228 #define POLYNOMIAL_LE 0xedb88320 229 uint32_t net_crc32(const uint8_t *p, int len); 230 uint32_t net_crc32_le(const uint8_t *p, int len); 231 unsigned compute_mcast_idx(const uint8_t *ep); 232 233 #define vmstate_offset_macaddr(_state, _field) \ 234 vmstate_offset_array(_state, _field.a, uint8_t, \ 235 sizeof(typeof_field(_state, _field))) 236 237 #define VMSTATE_MACADDR(_field, _state) { \ 238 .name = (stringify(_field)), \ 239 .size = sizeof(MACAddr), \ 240 .info = &vmstate_info_buffer, \ 241 .flags = VMS_BUFFER, \ 242 .offset = vmstate_offset_macaddr(_state, _field), \ 243 } 244 245 #endif 246