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https://gitlab.uni-freiburg.de/opensourcevdi/spice
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cd402151de
semi-seamless migration details:
migration source side
---------------------
(1) spice_server_migrate_connect (*): tell client to link
to the target side - send SPICE_MSG_MAIN_MIGRATE_BEGIN.
This should be called upon client_migrate_info cmd.
client_migrate_info is asynchronous.
(2) Complete spice_server_migrate_connect only when the client has been connected
to the target - wait for SPICE_MSGC_MAIN_MIGRATE_(CONNECTED|CONNECT_ERROR) or a timeout.
(3) spice_server_migrate_end: tell client migration it can switch to the target - send
SPICE_MSG_MAIN_MIGRATE_END.
(4) client cleans up all data related to the connection to the source and switches to the target.
It sends SPICE_MSGC_MAIN_MIGRATE_END.
migration target side
---------------------
(1) the server identifies itself as a migraiton target since the client is linked with (connection_id != 0)
(2) server doesn't start the channels' logic (channel->link) till it receives SPICE_MSGC_MAIN_MIGRATE_END
from the client.
* After migration starts, the target qemu is blocked and cannot accept new spice client
connections. Thus, we trigger the connection to the target upon client_migrate_info
command.
(cherry picked from commit 6e56bea67c branch 0.8)
Conflicts:
server/spice.h
42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
#ifndef __SPICE_EXPERIMENTAL_H__
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#define __SPICE_EXPERIMENTAL_H__
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#include "spice.h"
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/* tunnel interface */
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#define SPICE_INTERFACE_NET_WIRE "net_wire"
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#define SPICE_INTERFACE_NET_WIRE_MAJOR 1
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#define SPICE_INTERFACE_NET_WIRE_MINOR 1
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typedef struct SpiceNetWireInterface SpiceNetWireInterface;
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typedef struct SpiceNetWireInstance SpiceNetWireInstance;
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typedef struct SpiceNetWireState SpiceNetWireState;
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struct SpiceNetWireInterface {
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SpiceBaseInterface base;
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struct in_addr (*get_ip)(SpiceNetWireInstance *sin);
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int (*can_send_packet)(SpiceNetWireInstance *sin);
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void (*send_packet)(SpiceNetWireInstance *sin, const uint8_t *pkt, int len);
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};
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struct SpiceNetWireInstance {
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SpiceBaseInstance base;
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SpiceNetWireState *st;
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};
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void spice_server_net_wire_recv_packet(SpiceNetWireInstance *sin,
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const uint8_t *pkt, int len);
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/* spice seamless client migration (broken) */
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enum {
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SPICE_MIGRATE_CLIENT_NONE = 1,
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SPICE_MIGRATE_CLIENT_WAITING,
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SPICE_MIGRATE_CLIENT_READY,
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};
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int spice_server_migrate_client_state(SpiceServer *s);
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#endif // __SPICE_EXPERIMENTAL_H__
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