include/net/net.h

   1 #ifndef QEMU_NET_H
   2 #define QEMU_NET_H
   3
   4 #include "qemu/queue.h"
   5 #include "qemu-common.h"
   6 #include "qapi/qmp/qdict.h"
   7 #include "qemu/option.h"
   8 #include "net/queue.h"
   9 #include "migration/vmstate.h"
  10 #include "qapi-types.h"
  11
  12 #define MAX_QUEUE_NUM 1024
  13
  14 /* Maximum GSO packet size (64k) plus plenty of room for
  15  * the ethernet and virtio_net headers
  16  */
  17 #define NET_BUFSIZE (4096 + 65536)
  18
  19 struct MACAddr {
  20     uint8_t a[6];
  21 };
  22
  23 /* qdev nic properties */
  24
  25 typedef struct NICPeers {
  26     NetClientState *ncs[MAX_QUEUE_NUM];
  27     int32_t queues;
  28 } NICPeers;
  29
  30 typedef struct NICConf {
  31     MACAddr macaddr;
  32     NICPeers peers;
  33     int32_t bootindex;
  34 } NICConf;
  35
  36 #define DEFINE_NIC_PROPERTIES(_state, _conf)                            \
  37     DEFINE_PROP_MACADDR("mac",   _state, _conf.macaddr),                \
  38     DEFINE_PROP_VLAN("vlan",     _state, _conf.peers),                   \
  39     DEFINE_PROP_NETDEV("netdev", _state, _conf.peers)
  40
  41
  42 /* Net clients */
  43
  44 typedef void (NetPoll)(NetClientState *, bool enable);
  45 typedef int (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
  59 typedef struct NetClientInfo {
  60     NetClientOptionsKind type;
  61     size_t size;
  62     NetReceive *receive;
  63     NetReceive *receive_raw;
  64     NetReceiveIOV *receive_iov;
  65     NetCanReceive *can_receive;
  66     NetCleanup *cleanup;
  67     LinkStatusChanged *link_status_changed;
  68     QueryRxFilter *query_rx_filter;
  69     NetPoll *poll;
  70     HasUfo *has_ufo;
  71     HasVnetHdr *has_vnet_hdr;
  72     HasVnetHdrLen *has_vnet_hdr_len;
  73     UsingVnetHdr *using_vnet_hdr;
  74     SetOffload *set_offload;
  75     SetVnetHdrLen *set_vnet_hdr_len;
  76 } NetClientInfo;
  77
  78 struct NetClientState {
  79     NetClientInfo *info;
  80     int link_down;
  81     QTAILQ_ENTRY(NetClientState) next;
  82     NetClientState *peer;
  83     NetQueue *incoming_queue;
  84     char *model;
  85     char *name;
  86     char info_str[256];
  87     unsigned receive_disabled : 1;
  88     NetClientDestructor *destructor;
  89     unsigned int queue_index;
  90     unsigned rxfilter_notify_enabled:1;
  91 };
  92
  93 typedef struct NICState {
  94     NetClientState *ncs;
  95     NICConf *conf;
  96     void *opaque;
  97     bool peer_deleted;
  98 } NICState;
  99
 100 NetClientState *qemu_find_netdev(const char *id);
 101 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
 102                                  NetClientOptionsKind type, int max);
 103 NetClientState *qemu_new_net_client(NetClientInfo *info,
 104                                     NetClientState *peer,
 105                                     const char *model,
 106                                     const char *name);
 107 NICState *qemu_new_nic(NetClientInfo *info,
 108                        NICConf *conf,
 109                        const char *model,
 110                        const char *name,
 111                        void *opaque);
 112 void qemu_del_nic(NICState *nic);
 113 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index);
 114 NetClientState *qemu_get_queue(NICState *nic);
 115 NICState *qemu_get_nic(NetClientState *nc);
 116 void *qemu_get_nic_opaque(NetClientState *nc);
 117 void qemu_del_net_client(NetClientState *nc);
 118 NetClientState *qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
 119                                               const char *client_str);
 120 typedef void (*qemu_nic_foreach)(NICState *nic, void *opaque);
 121 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque);
 122 int qemu_can_send_packet(NetClientState *nc);
 123 ssize_t qemu_sendv_packet(NetClientState *nc, const struct iovec *iov,
 124                           int iovcnt);
 125 ssize_t qemu_sendv_packet_async(NetClientState *nc, const struct iovec *iov,
 126                                 int iovcnt, NetPacketSent *sent_cb);
 127 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size);
 128 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size);
 129 ssize_t qemu_send_packet_async(NetClientState *nc, const uint8_t *buf,
 130                                int size, NetPacketSent *sent_cb);
 131 void qemu_purge_queued_packets(NetClientState *nc);
 132 void qemu_flush_queued_packets(NetClientState *nc);
 133 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]);
 134 bool qemu_has_ufo(NetClientState *nc);
 135 bool qemu_has_vnet_hdr(NetClientState *nc);
 136 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len);
 137 void qemu_using_vnet_hdr(NetClientState *nc, bool enable);
 138 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
 139                       int ecn, int ufo);
 140 void qemu_set_vnet_hdr_len(NetClientState *nc, int len);
 141 void qemu_macaddr_default_if_unset(MACAddr *macaddr);
 142 int qemu_show_nic_models(const char *arg, const char *const *models);
 143 void qemu_check_nic_model(NICInfo *nd, const char *model);
 144 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
 145                         const char *default_model);
 146
 147 ssize_t qemu_deliver_packet(NetClientState *sender,
 148                             unsigned flags,
 149                             const uint8_t *data,
 150                             size_t size,
 151                             void *opaque);
 152 ssize_t qemu_deliver_packet_iov(NetClientState *sender,
 153                             unsigned flags,
 154                             const struct iovec *iov,
 155                             int iovcnt,
 156                             void *opaque);
 157
 158 void print_net_client(Monitor *mon, NetClientState *nc);
 159 void hmp_info_network(Monitor *mon, const QDict *qdict);
 160
 161 /* NIC info */
 162
 163 #define MAX_NICS 8
 164
 165 struct NICInfo {
 166     MACAddr macaddr;
 167     char *model;
 168     char *name;
 169     char *devaddr;
 170     NetClientState *netdev;
 171     int used;         /* is this slot in nd_table[] being used? */
 172     int instantiated; /* does this NICInfo correspond to an instantiated NIC? */
 173     int nvectors;
 174 };
 175
 176 extern int nb_nics;
 177 extern NICInfo nd_table[MAX_NICS];
 178 extern int default_net;
 179 extern const char *host_net_devices[];
 180
 181 /* from net.c */
 182 extern const char *legacy_tftp_prefix;
 183 extern const char *legacy_bootp_filename;
 184
 185 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp);
 186 int net_client_parse(QemuOptsList *opts_list, const char *str);
 187 int net_init_clients(void);
 188 void net_check_clients(void);
 189 void net_cleanup(void);
 190 void hmp_host_net_add(Monitor *mon, const QDict *qdict);
 191 void hmp_host_net_remove(Monitor *mon, const QDict *qdict);
 192 void netdev_add(QemuOpts *opts, Error **errp);
 193 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret);
 194
 195 int net_hub_id_for_client(NetClientState *nc, int *id);
 196 NetClientState *net_hub_port_find(int hub_id);
 197
 198 #define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
 199 #define DEFAULT_NETWORK_DOWN_SCRIPT "/etc/qemu-ifdown"
 200 #define DEFAULT_BRIDGE_HELPER CONFIG_QEMU_HELPERDIR "/qemu-bridge-helper"
 201 #define DEFAULT_BRIDGE_INTERFACE "br0"
 202
 203 void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd);
 204
 205 #define POLYNOMIAL 0x04c11db6
 206 unsigned compute_mcast_idx(const uint8_t *ep);
 207
 208 #define vmstate_offset_macaddr(_state, _field)                       \
 209     vmstate_offset_array(_state, _field.a, uint8_t,                \
 210                          sizeof(typeof_field(_state, _field)))
 211
 212 #define VMSTATE_MACADDR(_field, _state) {                            \
 213     .name       = (stringify(_field)),                               \
 214     .size       = sizeof(MACAddr),                                   \
 215     .info       = &vmstate_info_buffer,                              \
 216     .flags      = VMS_BUFFER,                                        \
 217     .offset     = vmstate_offset_macaddr(_state, _field),            \
 218 }
 219
 220 #endif