d32fcad366
Socket buffer sizes were hard-coded to 4K for VDE and socket netdevs. Bump this
up to 68K (ala tap netdev) to handle maximum GSO packet size (64k) plus plenty
of room for the ethernet and virtio_net headers.
Originally, ran into this limitation when using -netdev UDP sockets to connect
VM-to-VM, where VM interface is configure with MTU=9000. (Using virtio_net
NIC model). Test is simple: ping -M do -s 8500 <target>. This test will
attempt to ping with unfragmented packet of given size. Without patch, size
is limited to < 4K (minus protocol hdrs). With patch, ping test works with pkt
size up to 9000 (again, minus protocol hdrs).
v2: per Stefan, increase buf size to (4096+65536) as done in tap and apply
to vde and socket netdevs.
v1: increase buf size to 12K just for -netdev UDP sockets
Signed-off-by: Scott Feldman <sfeldma@cumulusnetworks.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
199 lines
6.9 KiB
C
199 lines
6.9 KiB
C
#ifndef QEMU_NET_H
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#define QEMU_NET_H
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#include "qemu/queue.h"
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#include "qemu-common.h"
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#include "qapi/qmp/qdict.h"
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#include "qemu/option.h"
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#include "net/queue.h"
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#include "migration/vmstate.h"
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#include "qapi-types.h"
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#define MAX_QUEUE_NUM 1024
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/* Maximum GSO packet size (64k) plus plenty of room for
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* the ethernet and virtio_net headers
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*/
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#define NET_BUFSIZE (4096 + 65536)
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struct MACAddr {
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uint8_t a[6];
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};
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/* qdev nic properties */
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typedef struct NICPeers {
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NetClientState *ncs[MAX_QUEUE_NUM];
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} NICPeers;
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typedef struct NICConf {
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MACAddr macaddr;
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NICPeers peers;
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int32_t bootindex;
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int32_t queues;
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} NICConf;
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#define DEFINE_NIC_PROPERTIES(_state, _conf) \
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DEFINE_PROP_MACADDR("mac", _state, _conf.macaddr), \
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DEFINE_PROP_VLAN("vlan", _state, _conf.peers), \
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DEFINE_PROP_NETDEV("netdev", _state, _conf.peers), \
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DEFINE_PROP_INT32("bootindex", _state, _conf.bootindex, -1)
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/* Net clients */
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typedef void (NetPoll)(NetClientState *, bool enable);
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typedef int (NetCanReceive)(NetClientState *);
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typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t);
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typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int);
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typedef void (NetCleanup) (NetClientState *);
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typedef void (LinkStatusChanged)(NetClientState *);
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typedef void (NetClientDestructor)(NetClientState *);
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typedef struct NetClientInfo {
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NetClientOptionsKind type;
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size_t size;
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NetReceive *receive;
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NetReceive *receive_raw;
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NetReceiveIOV *receive_iov;
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NetCanReceive *can_receive;
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NetCleanup *cleanup;
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LinkStatusChanged *link_status_changed;
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NetPoll *poll;
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} NetClientInfo;
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struct NetClientState {
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NetClientInfo *info;
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int link_down;
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QTAILQ_ENTRY(NetClientState) next;
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NetClientState *peer;
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NetQueue *send_queue;
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char *model;
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char *name;
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char info_str[256];
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unsigned receive_disabled : 1;
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NetClientDestructor *destructor;
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unsigned int queue_index;
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};
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typedef struct NICState {
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NetClientState *ncs;
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NICConf *conf;
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void *opaque;
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bool peer_deleted;
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} NICState;
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NetClientState *qemu_find_netdev(const char *id);
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int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
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NetClientOptionsKind type, int max);
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NetClientState *qemu_new_net_client(NetClientInfo *info,
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NetClientState *peer,
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const char *model,
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const char *name);
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NICState *qemu_new_nic(NetClientInfo *info,
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NICConf *conf,
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const char *model,
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const char *name,
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void *opaque);
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void qemu_del_nic(NICState *nic);
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NetClientState *qemu_get_subqueue(NICState *nic, int queue_index);
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NetClientState *qemu_get_queue(NICState *nic);
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NICState *qemu_get_nic(NetClientState *nc);
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void *qemu_get_nic_opaque(NetClientState *nc);
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void qemu_del_net_client(NetClientState *nc);
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NetClientState *qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
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const char *client_str);
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typedef void (*qemu_nic_foreach)(NICState *nic, void *opaque);
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void qemu_foreach_nic(qemu_nic_foreach func, void *opaque);
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int qemu_can_send_packet(NetClientState *nc);
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ssize_t qemu_sendv_packet(NetClientState *nc, const struct iovec *iov,
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int iovcnt);
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ssize_t qemu_sendv_packet_async(NetClientState *nc, const struct iovec *iov,
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int iovcnt, NetPacketSent *sent_cb);
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void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size);
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ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size);
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ssize_t qemu_send_packet_async(NetClientState *nc, const uint8_t *buf,
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int size, NetPacketSent *sent_cb);
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void qemu_purge_queued_packets(NetClientState *nc);
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void qemu_flush_queued_packets(NetClientState *nc);
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void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]);
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void qemu_macaddr_default_if_unset(MACAddr *macaddr);
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int qemu_show_nic_models(const char *arg, const char *const *models);
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void qemu_check_nic_model(NICInfo *nd, const char *model);
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int qemu_find_nic_model(NICInfo *nd, const char * const *models,
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const char *default_model);
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ssize_t qemu_deliver_packet(NetClientState *sender,
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unsigned flags,
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const uint8_t *data,
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size_t size,
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void *opaque);
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ssize_t qemu_deliver_packet_iov(NetClientState *sender,
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unsigned flags,
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const struct iovec *iov,
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int iovcnt,
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void *opaque);
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void print_net_client(Monitor *mon, NetClientState *nc);
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void do_info_network(Monitor *mon, const QDict *qdict);
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/* NIC info */
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#define MAX_NICS 8
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struct NICInfo {
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MACAddr macaddr;
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char *model;
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char *name;
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char *devaddr;
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NetClientState *netdev;
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int used; /* is this slot in nd_table[] being used? */
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int instantiated; /* does this NICInfo correspond to an instantiated NIC? */
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int nvectors;
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};
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extern int nb_nics;
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extern NICInfo nd_table[MAX_NICS];
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extern int default_net;
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/* from net.c */
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extern const char *legacy_tftp_prefix;
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extern const char *legacy_bootp_filename;
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int net_client_init(QemuOpts *opts, int is_netdev, Error **errp);
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int net_client_parse(QemuOptsList *opts_list, const char *str);
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int net_init_clients(void);
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void net_check_clients(void);
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void net_cleanup(void);
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void net_host_device_add(Monitor *mon, const QDict *qdict);
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void net_host_device_remove(Monitor *mon, const QDict *qdict);
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void netdev_add(QemuOpts *opts, Error **errp);
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int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret);
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int net_hub_id_for_client(NetClientState *nc, int *id);
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NetClientState *net_hub_port_find(int hub_id);
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#define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
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#define DEFAULT_NETWORK_DOWN_SCRIPT "/etc/qemu-ifdown"
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#define DEFAULT_BRIDGE_HELPER CONFIG_QEMU_HELPERDIR "/qemu-bridge-helper"
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#define DEFAULT_BRIDGE_INTERFACE "br0"
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void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd);
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#define POLYNOMIAL 0x04c11db6
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unsigned compute_mcast_idx(const uint8_t *ep);
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#define vmstate_offset_macaddr(_state, _field) \
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vmstate_offset_array(_state, _field.a, uint8_t, \
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sizeof(typeof_field(_state, _field)))
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#define VMSTATE_MACADDR(_field, _state) { \
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.name = (stringify(_field)), \
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.size = sizeof(MACAddr), \
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.info = &vmstate_info_buffer, \
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.flags = VMS_BUFFER, \
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.offset = vmstate_offset_macaddr(_state, _field), \
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}
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#endif
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