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 #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 int (NetLoad)(NetClientState *);
  49 typedef void (NetStop)(NetClientState *);
  50 typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t);
  51 typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int);
  52 typedef void (NetCleanup) (NetClientState *);
  53 typedef void (LinkStatusChanged)(NetClientState *);
  54 typedef void (NetClientDestructor)(NetClientState *);
  55 typedef RxFilterInfo *(QueryRxFilter)(NetClientState *);
  56 typedef bool (HasUfo)(NetClientState *);
  57 typedef bool (HasVnetHdr)(NetClientState *);
  58 typedef bool (HasVnetHdrLen)(NetClientState *, int);
  59 typedef bool (GetUsingVnetHdr)(NetClientState *);
  60 typedef void (UsingVnetHdr)(NetClientState *, bool);
  61 typedef void (SetOffload)(NetClientState *, int, int, int, int, int);
  62 typedef int (GetVnetHdrLen)(NetClientState *);
  63 typedef void (SetVnetHdrLen)(NetClientState *, int);
  64 typedef int (SetVnetLE)(NetClientState *, bool);
  65 typedef int (SetVnetBE)(NetClientState *, bool);
  66 typedef struct SocketReadState SocketReadState;
  67 typedef void (SocketReadStateFinalize)(SocketReadState *rs);
  68 typedef void (NetAnnounce)(NetClientState *);
  69 typedef bool (SetSteeringEBPF)(NetClientState *, int);
  70 typedef bool (NetCheckPeerType)(NetClientState *, ObjectClass *, Error **);
  71
  72 typedef struct NetClientInfo {
  73     NetClientDriver type;
  74     size_t size;
  75     NetReceive *receive;
  76     NetReceive *receive_raw;
  77     NetReceiveIOV *receive_iov;
  78     NetCanReceive *can_receive;
  79     NetStart *start;
  80     NetLoad *load;
  81     NetStop *stop;
  82     NetCleanup *cleanup;
  83     LinkStatusChanged *link_status_changed;
  84     QueryRxFilter *query_rx_filter;
  85     NetPoll *poll;
  86     HasUfo *has_ufo;
  87     HasVnetHdr *has_vnet_hdr;
  88     HasVnetHdrLen *has_vnet_hdr_len;
  89     GetUsingVnetHdr *get_using_vnet_hdr;
  90     UsingVnetHdr *using_vnet_hdr;
  91     SetOffload *set_offload;
  92     GetVnetHdrLen *get_vnet_hdr_len;
  93     SetVnetHdrLen *set_vnet_hdr_len;
  94     SetVnetLE *set_vnet_le;
  95     SetVnetBE *set_vnet_be;
  96     NetAnnounce *announce;
  97     SetSteeringEBPF *set_steering_ebpf;
  98     NetCheckPeerType *check_peer_type;
  99 } NetClientInfo;
 100
 101 struct NetClientState {
 102     NetClientInfo *info;
 103     int link_down;
 104     QTAILQ_ENTRY(NetClientState) next;
 105     NetClientState *peer;
 106     NetQueue *incoming_queue;
 107     char *model;
 108     char *name;
 109     char info_str[256];
 110     unsigned receive_disabled : 1;
 111     NetClientDestructor *destructor;
 112     unsigned int queue_index;
 113     unsigned rxfilter_notify_enabled:1;
 114     int vring_enable;
 115     int vnet_hdr_len;
 116     bool is_netdev;
 117     bool do_not_pad; /* do not pad to the minimum ethernet frame length */
 118     bool is_datapath;
 119     QTAILQ_HEAD(, NetFilterState) filters;
 120 };
 121
 122 typedef QTAILQ_HEAD(NetClientStateList, NetClientState) NetClientStateList;
 123
 124 typedef struct NICState {
 125     NetClientState *ncs;
 126     NICConf *conf;
 127     void *opaque;
 128     bool peer_deleted;
 129 } NICState;
 130
 131 struct SocketReadState {
 132     /* 0 = getting length, 1 = getting vnet header length, 2 = getting data */
 133     int state;
 134     /* This flag decide whether to read the vnet_hdr_len field */
 135     bool vnet_hdr;
 136     uint32_t index;
 137     uint32_t packet_len;
 138     uint32_t vnet_hdr_len;
 139     uint8_t buf[NET_BUFSIZE];
 140     SocketReadStateFinalize *finalize;
 141 };
 142
 143 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size);
 144 char *qemu_mac_strdup_printf(const uint8_t *macaddr);
 145 NetClientState *qemu_find_netdev(const char *id);
 146 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
 147                                  NetClientDriver type, int max);
 148 NetClientState *qemu_new_net_client(NetClientInfo *info,
 149                                     NetClientState *peer,
 150                                     const char *model,
 151                                     const char *name);
 152 NetClientState *qemu_new_net_control_client(NetClientInfo *info,
 153                                         NetClientState *peer,
 154                                         const char *model,
 155                                         const char *name);
 156 NICState *qemu_new_nic(NetClientInfo *info,
 157                        NICConf *conf,
 158                        const char *model,
 159                        const char *name,
 160                        void *opaque);
 161 void qemu_del_nic(NICState *nic);
 162 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index);
 163 NetClientState *qemu_get_queue(NICState *nic);
 164 NICState *qemu_get_nic(NetClientState *nc);
 165 void *qemu_get_nic_opaque(NetClientState *nc);
 166 void qemu_del_net_client(NetClientState *nc);
 167 typedef void (*qemu_nic_foreach)(NICState *nic, void *opaque);
 168 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque);
 169 int qemu_can_receive_packet(NetClientState *nc);
 170 int qemu_can_send_packet(NetClientState *nc);
 171 ssize_t qemu_sendv_packet(NetClientState *nc, const struct iovec *iov,
 172                           int iovcnt);
 173 ssize_t qemu_sendv_packet_async(NetClientState *nc, const struct iovec *iov,
 174                                 int iovcnt, NetPacketSent *sent_cb);
 175 ssize_t qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size);
 176 ssize_t qemu_receive_packet(NetClientState *nc, const uint8_t *buf, int size);
 177 ssize_t qemu_receive_packet_iov(NetClientState *nc,
 178                                 const struct iovec *iov,
 179                                 int iovcnt);
 180 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size);
 181 ssize_t qemu_send_packet_async(NetClientState *nc, const uint8_t *buf,
 182                                int size, NetPacketSent *sent_cb);
 183 void qemu_purge_queued_packets(NetClientState *nc);
 184 void qemu_flush_queued_packets(NetClientState *nc);
 185 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge);
 186 void qemu_set_info_str(NetClientState *nc,
 187                        const char *fmt, ...) G_GNUC_PRINTF(2, 3);
 188 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]);
 189 bool qemu_has_ufo(NetClientState *nc);
 190 bool qemu_has_vnet_hdr(NetClientState *nc);
 191 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len);
 192 bool qemu_get_using_vnet_hdr(NetClientState *nc);
 193 void qemu_using_vnet_hdr(NetClientState *nc, bool enable);
 194 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
 195                       int ecn, int ufo);
 196 int qemu_get_vnet_hdr_len(NetClientState *nc);
 197 void qemu_set_vnet_hdr_len(NetClientState *nc, int len);
 198 int qemu_set_vnet_le(NetClientState *nc, bool is_le);
 199 int qemu_set_vnet_be(NetClientState *nc, bool is_be);
 200 void qemu_macaddr_default_if_unset(MACAddr *macaddr);
 201 int qemu_show_nic_models(const char *arg, const char *const *models);
 202 void qemu_check_nic_model(NICInfo *nd, const char *model);
 203 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
 204                         const char *default_model);
 205
 206 void print_net_client(Monitor *mon, NetClientState *nc);
 207 void net_socket_rs_init(SocketReadState *rs,
 208                         SocketReadStateFinalize *finalize,
 209                         bool vnet_hdr);
 210 NetClientState *qemu_get_peer(NetClientState *nc, int queue_index);
 211
 212 /**
 213  * qemu_get_nic_models:
 214  * @device_type: Defines which devices should be taken into consideration
 215  *               (e.g. TYPE_DEVICE for all devices, or TYPE_PCI_DEVICE for PCI)
 216  *
 217  * Get an array of pointers to names of NIC devices that are available in
 218  * the QEMU binary. The array is terminated with a NULL pointer entry.
 219  * The caller is responsible for freeing the memory when it is not required
 220  * anymore, e.g. with g_ptr_array_free(..., true).
 221  *
 222  * Returns: Pointer to the array that contains the pointers to the names.
 223  */
 224 GPtrArray *qemu_get_nic_models(const char *device_type);
 225
 226 /* NIC info */
 227
 228 #define MAX_NICS 8
 229
 230 struct NICInfo {
 231     MACAddr macaddr;
 232     char *model;
 233     char *name;
 234     char *devaddr;
 235     NetClientState *netdev;
 236     int used;         /* is this slot in nd_table[] being used? */
 237     int instantiated; /* does this NICInfo correspond to an instantiated NIC? */
 238     int nvectors;
 239 };
 240
 241 extern int nb_nics;
 242 extern NICInfo nd_table[MAX_NICS];
 243 extern const char *host_net_devices[];
 244
 245 /* from net.c */
 246 extern NetClientStateList net_clients;
 247 bool netdev_is_modern(const char *optarg);
 248 void netdev_parse_modern(const char *optarg);
 249 void net_client_parse(QemuOptsList *opts_list, const char *str);
 250 void show_netdevs(void);
 251 void net_init_clients(void);
 252 void net_check_clients(void);
 253 void net_cleanup(void);
 254 void hmp_host_net_add(Monitor *mon, const QDict *qdict);
 255 void hmp_host_net_remove(Monitor *mon, const QDict *qdict);
 256 void netdev_add(QemuOpts *opts, Error **errp);
 257
 258 int net_hub_id_for_client(NetClientState *nc, int *id);
 259 NetClientState *net_hub_port_find(int hub_id);
 260
 261 #define DEFAULT_NETWORK_SCRIPT CONFIG_SYSCONFDIR "/qemu-ifup"
 262 #define DEFAULT_NETWORK_DOWN_SCRIPT CONFIG_SYSCONFDIR "/qemu-ifdown"
 263 #define DEFAULT_BRIDGE_HELPER CONFIG_QEMU_HELPERDIR "/qemu-bridge-helper"
 264 #define DEFAULT_BRIDGE_INTERFACE "br0"
 265
 266 void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd);
 267
 268 #define POLYNOMIAL_BE 0x04c11db6
 269 #define POLYNOMIAL_LE 0xedb88320
 270 uint32_t net_crc32(const uint8_t *p, int len);
 271 uint32_t net_crc32_le(const uint8_t *p, int len);
 272
 273 #define vmstate_offset_macaddr(_state, _field)                       \
 274     vmstate_offset_array(_state, _field.a, uint8_t,                \
 275                          sizeof(typeof_field(_state, _field)))
 276
 277 #define VMSTATE_MACADDR(_field, _state) {                            \
 278     .name       = (stringify(_field)),                               \
 279     .size       = sizeof(MACAddr),                                   \
 280     .info       = &vmstate_info_buffer,                              \
 281     .flags      = VMS_BUFFER,                                        \
 282     .offset     = vmstate_offset_macaddr(_state, _field),            \
 283 }
 284
 285 static inline bool net_peer_needs_padding(NetClientState *nc)
 286 {
 287   return nc->peer && !nc->peer->do_not_pad;
 288 }
 289
 290 #endif