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Introduce UI for live migration

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This patch introduces a command line parameter and monitor command for starting
a live migration.  The next patch will provide an example of how to use these
parameters.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5476 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2008-10-13 03:12:02 +00:00
parent 39b65c2e31
commit 5bb7910af0
6 changed files with 150 additions and 2 deletions
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2
Makefile.target
View File

@ -474,7 +474,7 @@ endif #CONFIG_DARWIN_USER
ifndef CONFIG_USER_ONLY
OBJS=vl.o osdep.o monitor.o pci.o loader.o isa_mmio.o machine.o net-checksum.o
OBJS+=fw_cfg.o aio.o buffered_file.o
OBJS+=fw_cfg.o aio.o buffered_file.o migration.o
ifdef CONFIG_WIN32
OBJS+=block-raw-win32.o
else

83
migration.c Normal file
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@ -0,0 +1,83 @@
/*
* QEMU live migration
*
* Copyright IBM, Corp. 2008
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#include "qemu-common.h"
#include "migration.h"
#include "console.h"
/* Migration speed throttling */
static uint32_t max_throttle = (32 << 20);
static MigrationState *current_migration;
void qemu_start_incoming_migration(const char *uri)
{
fprintf(stderr, "unknown migration protocol: %s\n", uri);
}
void do_migrate(int detach, const char *uri)
{
term_printf("unknown migration protocol: %s\n", uri);
}
void do_migrate_cancel(void)
{
MigrationState *s = current_migration;
if (s)
s->cancel(s);
}
void do_migrate_set_speed(const char *value)
{
double d;
char *ptr;
d = strtod(value, &ptr);
switch (*ptr) {
case 'G': case 'g':
d *= 1024;
case 'M': case 'm':
d *= 1024;
case 'K': case 'k':
d *= 1024;
default:
break;
}
max_throttle = (uint32_t)d;
}
void do_info_migrate(void)
{
MigrationState *s = current_migration;
if (s) {
term_printf("Migration status: ");
switch (s->get_status(s)) {
case MIG_STATE_ACTIVE:
term_printf("active\n");
break;
case MIG_STATE_COMPLETED:
term_printf("completed\n");
break;
case MIG_STATE_ERROR:
term_printf("failed\n");
break;
case MIG_STATE_CANCELLED:
term_printf("cancelled\n");
break;
}
}
}

43
migration.h Normal file
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@ -0,0 +1,43 @@
/*
* QEMU live migration
*
* Copyright IBM, Corp. 2008
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#ifndef QEMU_MIGRATION_H
#define QEMU_MIGRATION_H
#define MIG_STATE_ERROR -1
#define MIG_STATE_COMPLETED 0
#define MIG_STATE_CANCELLED 1
#define MIG_STATE_ACTIVE 2
typedef struct MigrationState MigrationState;
struct MigrationState
{
/* FIXME: add more accessors to print migration info */
void (*cancel)(MigrationState *s);
int (*get_status)(MigrationState *s);
void (*release)(MigrationState *s);
};
void qemu_start_incoming_migration(const char *uri);
void do_migrate(int detach, const char *uri);
void do_migrate_cancel(void);
void do_migrate_set_speed(const char *value);
void do_info_migrate(void);
#endif

8
monitor.c
View File

@ -36,6 +36,7 @@
#include "disas.h"
#include <dirent.h>
#include "qemu-timer.h"
#include "migration.h"
//#define DEBUG
//#define DEBUG_COMPLETION
@ -1454,6 +1455,12 @@ static const term_cmd_t term_cmds[] = {
{ "nmi", "i", do_inject_nmi,
"cpu", "inject an NMI on the given CPU", },
#endif
{ "migrate", "-ds", do_migrate,
"[-d] uri", "migrate to URI (using -d to not wait for completion)" },
{ "migrate_cancel", "", do_migrate_cancel,
"", "cancel the current VM migration" },
{ "migrate_set_speed", "s", do_migrate_set_speed,
"value", "set maximum speed (in bytes) for migrations" },
{ NULL, NULL, },
};
@ -1516,6 +1523,7 @@ static const term_cmd_t info_cmds[] = {
{ "slirp", "", do_info_slirp,
"", "show SLIRP statistics", },
#endif
{ "migrate", "", do_info_migrate, "", "show migration status" },
{ NULL, NULL, },
};

1
qemu_socket.h
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@ -31,5 +31,6 @@ int inet_aton(const char *cp, struct in_addr *ia);
#endif /* !_WIN32 */
void socket_set_nonblock(int fd);
int parse_host_port(struct sockaddr_in *saddr, const char *str);
#endif /* QEMU_SOCKET_H */

15
vl.c
View File

@ -38,6 +38,7 @@
#include "qemu-char.h"
#include "block.h"
#include "audio/audio.h"
#include "migration.h"
#include <unistd.h>
#include <fcntl.h>
@ -3364,7 +3365,6 @@ static void udp_chr_update_read_handler(CharDriverState *chr)
}
}
int parse_host_port(struct sockaddr_in *saddr, const char *str);
#ifndef _WIN32
static int parse_unix_path(struct sockaddr_un *uaddr, const char *str);
#endif
@ -6766,6 +6766,8 @@ int qemu_savevm_state(QEMUFile *f)
saved_vm_running = vm_running;
vm_stop(0);
bdrv_flush_all();
ret = qemu_savevm_state_begin(f);
if (ret < 0)
goto out;
@ -8338,6 +8340,7 @@ enum {
QEMU_OPTION_tb_size,
QEMU_OPTION_icount,
QEMU_OPTION_uuid,
QEMU_OPTION_incoming,
};
typedef struct QEMUOption {
@ -8450,6 +8453,7 @@ static const QEMUOption qemu_options[] = {
{ "startdate", HAS_ARG, QEMU_OPTION_startdate },
{ "tb-size", HAS_ARG, QEMU_OPTION_tb_size },
{ "icount", HAS_ARG, QEMU_OPTION_icount },
{ "incoming", HAS_ARG, QEMU_OPTION_incoming },
{ NULL },
};
@ -8742,6 +8746,7 @@ int main(int argc, char **argv)
const char *pid_file = NULL;
VLANState *vlan;
int autostart;
const char *incoming = NULL;
LIST_INIT (&vm_change_state_head);
#ifndef _WIN32
@ -9349,6 +9354,9 @@ int main(int argc, char **argv)
icount_time_shift = strtol(optarg, NULL, 0);
}
break;
case QEMU_OPTION_incoming:
incoming = optarg;
break;
}
}
}
@ -9691,6 +9699,11 @@ int main(int argc, char **argv)
if (loadvm)
do_loadvm(loadvm);
if (incoming) {
autostart = 0; /* fixme how to deal with -daemonize */
qemu_start_incoming_migration(incoming);
}
{
/* XXX: simplify init */
read_passwords();