34c9dd8eea
This patch introduces a tcp protocol for live migration. It can be used as follows: qemu-system-x86_64 -hda ~/images/linux-test.img -monitor stdio <vm runs for a while> (qemu) migrate tcp:localhost:1025 On the same system: qemu-system-x86_64 -hda ~/images/linux-test.img -incoming tcp:localhost:1025 The monitor can be interacted with while waiting for an incoming live migration. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5478 c046a42c-6fe2-441c-8c8c-71466251a162
104 lines
1.9 KiB
C
104 lines
1.9 KiB
C
/*
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* QEMU live migration
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*
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* Copyright IBM, Corp. 2008
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include "qemu-common.h"
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#include "migration.h"
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#include "console.h"
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/* Migration speed throttling */
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static uint32_t max_throttle = (32 << 20);
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static MigrationState *current_migration;
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void qemu_start_incoming_migration(const char *uri)
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{
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const char *p;
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if (strstart(uri, "tcp:", &p))
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tcp_start_incoming_migration(p);
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else
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fprintf(stderr, "unknown migration protocol: %s\n", uri);
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}
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void do_migrate(int detach, const char *uri)
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{
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MigrationState *s = NULL;
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const char *p;
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if (strstart(uri, "tcp:", &p))
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s = tcp_start_outgoing_migration(p, max_throttle, detach);
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else
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term_printf("unknown migration protocol: %s\n", uri);
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if (s == NULL)
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term_printf("migration failed\n");
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else {
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if (current_migration)
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current_migration->release(current_migration);
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current_migration = s;
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}
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}
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void do_migrate_cancel(void)
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{
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MigrationState *s = current_migration;
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if (s)
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s->cancel(s);
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}
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void do_migrate_set_speed(const char *value)
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{
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double d;
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char *ptr;
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d = strtod(value, &ptr);
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switch (*ptr) {
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case 'G': case 'g':
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d *= 1024;
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case 'M': case 'm':
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d *= 1024;
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case 'K': case 'k':
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d *= 1024;
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default:
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break;
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}
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max_throttle = (uint32_t)d;
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}
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void do_info_migrate(void)
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{
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MigrationState *s = current_migration;
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if (s) {
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term_printf("Migration status: ");
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switch (s->get_status(s)) {
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case MIG_STATE_ACTIVE:
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term_printf("active\n");
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break;
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case MIG_STATE_COMPLETED:
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term_printf("completed\n");
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break;
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case MIG_STATE_ERROR:
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term_printf("failed\n");
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break;
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case MIG_STATE_CANCELLED:
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term_printf("cancelled\n");
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break;
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}
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}
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}
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