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