2008-11-12 00:33:36 +03:00
|
|
|
/*
|
|
|
|
* QEMU System Emulator
|
|
|
|
*
|
|
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
2015-05-08 14:20:21 +03:00
|
|
|
* Copyright (c) 2009-2015 Red Hat Inc
|
|
|
|
*
|
|
|
|
* Authors:
|
|
|
|
* Juan Quintela <quintela@redhat.com>
|
2008-11-12 00:33:36 +03:00
|
|
|
*
|
|
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
|
|
* in the Software without restriction, including without limitation the rights
|
|
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
|
|
* furnished to do so, subject to the following conditions:
|
|
|
|
*
|
|
|
|
* The above copyright notice and this permission notice shall be included in
|
|
|
|
* all copies or substantial portions of the Software.
|
|
|
|
*
|
|
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
|
|
* THE SOFTWARE.
|
|
|
|
*/
|
|
|
|
|
2016-01-26 21:16:54 +03:00
|
|
|
#include "qemu/osdep.h"
|
2016-03-15 18:58:45 +03:00
|
|
|
#include "cpu.h"
|
2014-06-20 17:26:08 +04:00
|
|
|
#include "hw/boards.h"
|
2009-03-07 18:32:56 +03:00
|
|
|
#include "hw/hw.h"
|
2010-06-25 21:09:14 +04:00
|
|
|
#include "hw/qdev.h"
|
2016-06-03 12:58:34 +03:00
|
|
|
#include "hw/xen/xen.h"
|
2012-10-24 10:43:34 +04:00
|
|
|
#include "net/net.h"
|
2012-12-17 21:19:49 +04:00
|
|
|
#include "monitor/monitor.h"
|
2012-12-17 21:20:04 +04:00
|
|
|
#include "sysemu/sysemu.h"
|
2012-12-17 21:20:00 +04:00
|
|
|
#include "qemu/timer.h"
|
2009-03-07 18:32:56 +03:00
|
|
|
#include "audio/audio.h"
|
2012-12-17 21:19:50 +04:00
|
|
|
#include "migration/migration.h"
|
2015-11-05 21:10:55 +03:00
|
|
|
#include "migration/postcopy-ram.h"
|
2015-03-17 19:22:46 +03:00
|
|
|
#include "qapi/qmp/qerror.h"
|
2015-03-17 20:29:20 +03:00
|
|
|
#include "qemu/error-report.h"
|
2012-12-17 21:20:00 +04:00
|
|
|
#include "qemu/sockets.h"
|
|
|
|
#include "qemu/queue.h"
|
2012-12-17 21:20:04 +04:00
|
|
|
#include "sysemu/cpus.h"
|
2012-12-17 21:19:49 +04:00
|
|
|
#include "exec/memory.h"
|
2012-01-25 16:24:51 +04:00
|
|
|
#include "qmp-commands.h"
|
2012-05-22 01:46:44 +04:00
|
|
|
#include "trace.h"
|
2015-11-05 21:10:52 +03:00
|
|
|
#include "qemu/bitops.h"
|
2013-03-22 18:47:58 +04:00
|
|
|
#include "qemu/iov.h"
|
2013-05-25 07:09:43 +04:00
|
|
|
#include "block/snapshot.h"
|
2013-05-25 07:09:44 +04:00
|
|
|
#include "block/qapi.h"
|
2016-03-20 20:16:19 +03:00
|
|
|
#include "qemu/cutils.h"
|
2016-04-27 13:05:01 +03:00
|
|
|
#include "io/channel-buffer.h"
|
2016-04-27 13:05:08 +03:00
|
|
|
#include "io/channel-file.h"
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2009-10-16 03:53:55 +04:00
|
|
|
#ifndef ETH_P_RARP
|
2010-04-24 16:54:07 +04:00
|
|
|
#define ETH_P_RARP 0x8035
|
2009-10-16 03:53:55 +04:00
|
|
|
#endif
|
|
|
|
#define ARP_HTYPE_ETH 0x0001
|
|
|
|
#define ARP_PTYPE_IP 0x0800
|
|
|
|
#define ARP_OP_REQUEST_REV 0x3
|
|
|
|
|
2015-11-05 21:10:52 +03:00
|
|
|
const unsigned int postcopy_ram_discard_version = 0;
|
|
|
|
|
2015-05-19 14:29:51 +03:00
|
|
|
static bool skip_section_footers;
|
|
|
|
|
2015-11-05 21:10:45 +03:00
|
|
|
static struct mig_cmd_args {
|
|
|
|
ssize_t len; /* -1 = variable */
|
|
|
|
const char *name;
|
|
|
|
} mig_cmd_args[] = {
|
|
|
|
[MIG_CMD_INVALID] = { .len = -1, .name = "INVALID" },
|
2015-11-05 21:10:46 +03:00
|
|
|
[MIG_CMD_OPEN_RETURN_PATH] = { .len = 0, .name = "OPEN_RETURN_PATH" },
|
|
|
|
[MIG_CMD_PING] = { .len = sizeof(uint32_t), .name = "PING" },
|
2015-11-05 21:10:52 +03:00
|
|
|
[MIG_CMD_POSTCOPY_ADVISE] = { .len = 16, .name = "POSTCOPY_ADVISE" },
|
|
|
|
[MIG_CMD_POSTCOPY_LISTEN] = { .len = 0, .name = "POSTCOPY_LISTEN" },
|
|
|
|
[MIG_CMD_POSTCOPY_RUN] = { .len = 0, .name = "POSTCOPY_RUN" },
|
|
|
|
[MIG_CMD_POSTCOPY_RAM_DISCARD] = {
|
|
|
|
.len = -1, .name = "POSTCOPY_RAM_DISCARD" },
|
2015-11-05 21:10:53 +03:00
|
|
|
[MIG_CMD_PACKAGED] = { .len = 4, .name = "PACKAGED" },
|
2015-11-05 21:10:45 +03:00
|
|
|
[MIG_CMD_MAX] = { .len = -1, .name = "MAX" },
|
|
|
|
};
|
|
|
|
|
2009-10-16 03:53:55 +04:00
|
|
|
static int announce_self_create(uint8_t *buf,
|
2013-11-28 18:01:12 +04:00
|
|
|
uint8_t *mac_addr)
|
2008-11-12 00:33:36 +03:00
|
|
|
{
|
2009-10-16 03:53:55 +04:00
|
|
|
/* Ethernet header. */
|
|
|
|
memset(buf, 0xff, 6); /* destination MAC addr */
|
|
|
|
memcpy(buf + 6, mac_addr, 6); /* source MAC addr */
|
|
|
|
*(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */
|
|
|
|
|
|
|
|
/* RARP header. */
|
|
|
|
*(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */
|
|
|
|
*(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */
|
|
|
|
*(buf + 18) = 6; /* hardware addr length (ethernet) */
|
|
|
|
*(buf + 19) = 4; /* protocol addr length (IPv4) */
|
|
|
|
*(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */
|
|
|
|
memcpy(buf + 22, mac_addr, 6); /* source hw addr */
|
|
|
|
memset(buf + 28, 0x00, 4); /* source protocol addr */
|
|
|
|
memcpy(buf + 32, mac_addr, 6); /* target hw addr */
|
|
|
|
memset(buf + 38, 0x00, 4); /* target protocol addr */
|
|
|
|
|
|
|
|
/* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
|
|
|
|
memset(buf + 42, 0x00, 18);
|
|
|
|
|
|
|
|
return 60; /* len (FCS will be added by hardware) */
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
|
2009-11-25 21:49:32 +03:00
|
|
|
static void qemu_announce_self_iter(NICState *nic, void *opaque)
|
2008-11-12 00:33:36 +03:00
|
|
|
{
|
2009-10-16 03:53:55 +04:00
|
|
|
uint8_t buf[60];
|
2009-11-25 21:49:32 +03:00
|
|
|
int len;
|
|
|
|
|
2014-03-11 03:42:29 +04:00
|
|
|
trace_qemu_announce_self_iter(qemu_ether_ntoa(&nic->conf->macaddr));
|
2009-11-25 21:49:32 +03:00
|
|
|
len = announce_self_create(buf, nic->conf->macaddr.a);
|
|
|
|
|
2013-01-30 15:12:22 +04:00
|
|
|
qemu_send_packet_raw(qemu_get_queue(nic), buf, len);
|
2009-11-25 21:49:32 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void qemu_announce_self_once(void *opaque)
|
|
|
|
{
|
2009-05-21 18:17:44 +04:00
|
|
|
static int count = SELF_ANNOUNCE_ROUNDS;
|
|
|
|
QEMUTimer *timer = *(QEMUTimer **)opaque;
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2009-11-25 21:49:32 +03:00
|
|
|
qemu_foreach_nic(qemu_announce_self_iter, NULL);
|
|
|
|
|
2009-10-16 03:53:55 +04:00
|
|
|
if (--count) {
|
|
|
|
/* delay 50ms, 150ms, 250ms, ... */
|
2013-08-21 19:03:08 +04:00
|
|
|
timer_mod(timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) +
|
2014-05-20 10:01:43 +04:00
|
|
|
self_announce_delay(count));
|
2009-05-21 18:17:44 +04:00
|
|
|
} else {
|
2013-11-28 18:01:12 +04:00
|
|
|
timer_del(timer);
|
|
|
|
timer_free(timer);
|
2009-05-21 18:17:44 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void qemu_announce_self(void)
|
|
|
|
{
|
2013-11-28 18:01:12 +04:00
|
|
|
static QEMUTimer *timer;
|
|
|
|
timer = timer_new_ms(QEMU_CLOCK_REALTIME, qemu_announce_self_once, &timer);
|
|
|
|
qemu_announce_self_once(&timer);
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
/***********************************************************/
|
|
|
|
/* savevm/loadvm support */
|
|
|
|
|
2013-04-05 23:27:54 +04:00
|
|
|
static ssize_t block_writev_buffer(void *opaque, struct iovec *iov, int iovcnt,
|
|
|
|
int64_t pos)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
QEMUIOVector qiov;
|
|
|
|
|
|
|
|
qemu_iovec_init_external(&qiov, iov, iovcnt);
|
|
|
|
ret = bdrv_writev_vmstate(opaque, &qiov, pos);
|
|
|
|
if (ret < 0) {
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
return qiov.size;
|
|
|
|
}
|
|
|
|
|
2015-08-13 13:51:33 +03:00
|
|
|
static ssize_t block_get_buffer(void *opaque, uint8_t *buf, int64_t pos,
|
|
|
|
size_t size)
|
2008-11-12 00:33:36 +03:00
|
|
|
{
|
2009-07-11 01:11:57 +04:00
|
|
|
return bdrv_load_vmstate(opaque, buf, pos, size);
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
static int bdrv_fclose(void *opaque)
|
|
|
|
{
|
2012-06-06 02:04:50 +04:00
|
|
|
return bdrv_flush(opaque);
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
|
2012-08-08 12:15:15 +04:00
|
|
|
static const QEMUFileOps bdrv_read_ops = {
|
|
|
|
.get_buffer = block_get_buffer,
|
|
|
|
.close = bdrv_fclose
|
|
|
|
};
|
|
|
|
|
|
|
|
static const QEMUFileOps bdrv_write_ops = {
|
2013-04-05 23:27:54 +04:00
|
|
|
.writev_buffer = block_writev_buffer,
|
|
|
|
.close = bdrv_fclose
|
2012-08-08 12:15:15 +04:00
|
|
|
};
|
|
|
|
|
2009-07-11 01:11:57 +04:00
|
|
|
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
|
2008-11-12 00:33:36 +03:00
|
|
|
{
|
2013-11-28 18:01:13 +04:00
|
|
|
if (is_writable) {
|
2012-08-08 12:15:15 +04:00
|
|
|
return qemu_fopen_ops(bs, &bdrv_write_ops);
|
2013-11-28 18:01:13 +04:00
|
|
|
}
|
2012-08-08 12:15:15 +04:00
|
|
|
return qemu_fopen_ops(bs, &bdrv_read_ops);
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
|
2011-09-12 18:21:44 +04:00
|
|
|
|
2013-11-29 18:26:02 +04:00
|
|
|
/* QEMUFile timer support.
|
|
|
|
* Not in qemu-file.c to not add qemu-timer.c as dependency to qemu-file.c
|
|
|
|
*/
|
2011-09-12 18:21:44 +04:00
|
|
|
|
2013-08-21 19:03:02 +04:00
|
|
|
void timer_put(QEMUFile *f, QEMUTimer *ts)
|
2011-09-12 18:21:44 +04:00
|
|
|
{
|
|
|
|
uint64_t expire_time;
|
|
|
|
|
2013-08-21 19:02:39 +04:00
|
|
|
expire_time = timer_expire_time_ns(ts);
|
2011-09-12 18:21:44 +04:00
|
|
|
qemu_put_be64(f, expire_time);
|
|
|
|
}
|
|
|
|
|
2013-08-21 19:03:02 +04:00
|
|
|
void timer_get(QEMUFile *f, QEMUTimer *ts)
|
2011-09-12 18:21:44 +04:00
|
|
|
{
|
|
|
|
uint64_t expire_time;
|
|
|
|
|
|
|
|
expire_time = qemu_get_be64(f);
|
|
|
|
if (expire_time != -1) {
|
2013-08-21 19:03:08 +04:00
|
|
|
timer_mod_ns(ts, expire_time);
|
2011-09-12 18:21:44 +04:00
|
|
|
} else {
|
2013-08-21 19:03:08 +04:00
|
|
|
timer_del(ts);
|
2011-09-12 18:21:44 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2013-11-29 18:26:02 +04:00
|
|
|
/* VMState timer support.
|
|
|
|
* Not in vmstate.c to not add qemu-timer.c as dependency to vmstate.c
|
|
|
|
*/
|
2009-08-20 21:42:26 +04:00
|
|
|
|
2017-01-19 22:00:50 +03:00
|
|
|
static int get_timer(QEMUFile *f, void *pv, size_t size, VMStateField *field)
|
2009-08-20 21:42:26 +04:00
|
|
|
{
|
|
|
|
QEMUTimer *v = pv;
|
2013-08-21 19:03:02 +04:00
|
|
|
timer_get(f, v);
|
2009-08-20 21:42:26 +04:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-01-19 22:00:50 +03:00
|
|
|
static int put_timer(QEMUFile *f, void *pv, size_t size, VMStateField *field,
|
|
|
|
QJSON *vmdesc)
|
2009-08-20 21:42:26 +04:00
|
|
|
{
|
2009-09-30 00:48:20 +04:00
|
|
|
QEMUTimer *v = pv;
|
2013-08-21 19:03:02 +04:00
|
|
|
timer_put(f, v);
|
2017-01-19 22:00:50 +03:00
|
|
|
|
|
|
|
return 0;
|
2009-08-20 21:42:26 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
const VMStateInfo vmstate_info_timer = {
|
|
|
|
.name = "timer",
|
|
|
|
.get = get_timer,
|
|
|
|
.put = put_timer,
|
|
|
|
};
|
|
|
|
|
2012-10-30 11:45:12 +04:00
|
|
|
|
2010-06-25 21:09:14 +04:00
|
|
|
typedef struct CompatEntry {
|
|
|
|
char idstr[256];
|
|
|
|
int instance_id;
|
|
|
|
} CompatEntry;
|
|
|
|
|
2008-11-12 00:33:36 +03:00
|
|
|
typedef struct SaveStateEntry {
|
2009-09-12 11:36:22 +04:00
|
|
|
QTAILQ_ENTRY(SaveStateEntry) entry;
|
2008-11-12 00:33:36 +03:00
|
|
|
char idstr[256];
|
|
|
|
int instance_id;
|
2010-05-15 15:32:40 +04:00
|
|
|
int alias_id;
|
2008-11-12 00:33:36 +03:00
|
|
|
int version_id;
|
|
|
|
int section_id;
|
2012-06-26 19:19:10 +04:00
|
|
|
SaveVMHandlers *ops;
|
2009-08-20 21:42:25 +04:00
|
|
|
const VMStateDescription *vmsd;
|
2008-11-12 00:33:36 +03:00
|
|
|
void *opaque;
|
2010-06-25 21:09:14 +04:00
|
|
|
CompatEntry *compat;
|
2012-01-25 16:24:51 +04:00
|
|
|
int is_ram;
|
2008-11-12 00:33:36 +03:00
|
|
|
} SaveStateEntry;
|
|
|
|
|
2015-05-13 14:37:04 +03:00
|
|
|
typedef struct SaveState {
|
|
|
|
QTAILQ_HEAD(, SaveStateEntry) handlers;
|
|
|
|
int global_section_id;
|
2015-05-13 19:17:43 +03:00
|
|
|
bool skip_configuration;
|
|
|
|
uint32_t len;
|
|
|
|
const char *name;
|
2016-10-24 18:26:50 +03:00
|
|
|
uint32_t target_page_bits;
|
2015-05-13 14:37:04 +03:00
|
|
|
} SaveState;
|
|
|
|
|
|
|
|
static SaveState savevm_state = {
|
|
|
|
.handlers = QTAILQ_HEAD_INITIALIZER(savevm_state.handlers),
|
|
|
|
.global_section_id = 0,
|
2015-05-13 19:17:43 +03:00
|
|
|
.skip_configuration = false,
|
|
|
|
};
|
|
|
|
|
|
|
|
void savevm_skip_configuration(void)
|
|
|
|
{
|
|
|
|
savevm_state.skip_configuration = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void configuration_pre_save(void *opaque)
|
|
|
|
{
|
|
|
|
SaveState *state = opaque;
|
|
|
|
const char *current_name = MACHINE_GET_CLASS(current_machine)->name;
|
|
|
|
|
|
|
|
state->len = strlen(current_name);
|
|
|
|
state->name = current_name;
|
2016-10-24 18:26:50 +03:00
|
|
|
state->target_page_bits = TARGET_PAGE_BITS;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int configuration_pre_load(void *opaque)
|
|
|
|
{
|
|
|
|
SaveState *state = opaque;
|
|
|
|
|
|
|
|
/* If there is no target-page-bits subsection it means the source
|
|
|
|
* predates the variable-target-page-bits support and is using the
|
|
|
|
* minimum possible value for this CPU.
|
|
|
|
*/
|
|
|
|
state->target_page_bits = TARGET_PAGE_BITS_MIN;
|
|
|
|
return 0;
|
2015-05-13 19:17:43 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
static int configuration_post_load(void *opaque, int version_id)
|
|
|
|
{
|
|
|
|
SaveState *state = opaque;
|
|
|
|
const char *current_name = MACHINE_GET_CLASS(current_machine)->name;
|
|
|
|
|
|
|
|
if (strncmp(state->name, current_name, state->len) != 0) {
|
2016-02-05 11:33:26 +03:00
|
|
|
error_report("Machine type received is '%.*s' and local is '%s'",
|
|
|
|
(int) state->len, state->name, current_name);
|
2015-05-13 19:17:43 +03:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
2016-10-24 18:26:50 +03:00
|
|
|
|
|
|
|
if (state->target_page_bits != TARGET_PAGE_BITS) {
|
|
|
|
error_report("Received TARGET_PAGE_BITS is %d but local is %d",
|
|
|
|
state->target_page_bits, TARGET_PAGE_BITS);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2015-05-13 19:17:43 +03:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2016-10-24 18:26:50 +03:00
|
|
|
/* The target-page-bits subsection is present only if the
|
|
|
|
* target page size is not the same as the default (ie the
|
|
|
|
* minimum page size for a variable-page-size guest CPU).
|
|
|
|
* If it is present then it contains the actual target page
|
|
|
|
* bits for the machine, and migration will fail if the
|
|
|
|
* two ends don't agree about it.
|
|
|
|
*/
|
|
|
|
static bool vmstate_target_page_bits_needed(void *opaque)
|
|
|
|
{
|
|
|
|
return TARGET_PAGE_BITS > TARGET_PAGE_BITS_MIN;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const VMStateDescription vmstate_target_page_bits = {
|
|
|
|
.name = "configuration/target-page-bits",
|
|
|
|
.version_id = 1,
|
|
|
|
.minimum_version_id = 1,
|
|
|
|
.needed = vmstate_target_page_bits_needed,
|
|
|
|
.fields = (VMStateField[]) {
|
|
|
|
VMSTATE_UINT32(target_page_bits, SaveState),
|
|
|
|
VMSTATE_END_OF_LIST()
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
2015-05-13 19:17:43 +03:00
|
|
|
static const VMStateDescription vmstate_configuration = {
|
|
|
|
.name = "configuration",
|
|
|
|
.version_id = 1,
|
2016-10-24 18:26:50 +03:00
|
|
|
.pre_load = configuration_pre_load,
|
2015-05-13 19:17:43 +03:00
|
|
|
.post_load = configuration_post_load,
|
|
|
|
.pre_save = configuration_pre_save,
|
|
|
|
.fields = (VMStateField[]) {
|
|
|
|
VMSTATE_UINT32(len, SaveState),
|
2017-02-03 20:52:17 +03:00
|
|
|
VMSTATE_VBUFFER_ALLOC_UINT32(name, SaveState, 0, NULL, len),
|
2015-05-13 19:17:43 +03:00
|
|
|
VMSTATE_END_OF_LIST()
|
|
|
|
},
|
2016-10-24 18:26:50 +03:00
|
|
|
.subsections = (const VMStateDescription*[]) {
|
|
|
|
&vmstate_target_page_bits,
|
|
|
|
NULL
|
|
|
|
}
|
2015-05-13 14:37:04 +03:00
|
|
|
};
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2014-06-20 17:26:08 +04:00
|
|
|
static void dump_vmstate_vmsd(FILE *out_file,
|
|
|
|
const VMStateDescription *vmsd, int indent,
|
|
|
|
bool is_subsection);
|
|
|
|
|
|
|
|
static void dump_vmstate_vmsf(FILE *out_file, const VMStateField *field,
|
|
|
|
int indent)
|
|
|
|
{
|
|
|
|
fprintf(out_file, "%*s{\n", indent, "");
|
|
|
|
indent += 2;
|
|
|
|
fprintf(out_file, "%*s\"field\": \"%s\",\n", indent, "", field->name);
|
|
|
|
fprintf(out_file, "%*s\"version_id\": %d,\n", indent, "",
|
|
|
|
field->version_id);
|
|
|
|
fprintf(out_file, "%*s\"field_exists\": %s,\n", indent, "",
|
|
|
|
field->field_exists ? "true" : "false");
|
|
|
|
fprintf(out_file, "%*s\"size\": %zu", indent, "", field->size);
|
|
|
|
if (field->vmsd != NULL) {
|
|
|
|
fprintf(out_file, ",\n");
|
|
|
|
dump_vmstate_vmsd(out_file, field->vmsd, indent, false);
|
|
|
|
}
|
|
|
|
fprintf(out_file, "\n%*s}", indent - 2, "");
|
|
|
|
}
|
|
|
|
|
|
|
|
static void dump_vmstate_vmss(FILE *out_file,
|
2014-09-23 16:09:54 +04:00
|
|
|
const VMStateDescription **subsection,
|
2014-06-20 17:26:08 +04:00
|
|
|
int indent)
|
|
|
|
{
|
2014-09-23 16:09:54 +04:00
|
|
|
if (*subsection != NULL) {
|
|
|
|
dump_vmstate_vmsd(out_file, *subsection, indent, true);
|
2014-06-20 17:26:08 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void dump_vmstate_vmsd(FILE *out_file,
|
|
|
|
const VMStateDescription *vmsd, int indent,
|
|
|
|
bool is_subsection)
|
|
|
|
{
|
|
|
|
if (is_subsection) {
|
|
|
|
fprintf(out_file, "%*s{\n", indent, "");
|
|
|
|
} else {
|
|
|
|
fprintf(out_file, "%*s\"%s\": {\n", indent, "", "Description");
|
|
|
|
}
|
|
|
|
indent += 2;
|
|
|
|
fprintf(out_file, "%*s\"name\": \"%s\",\n", indent, "", vmsd->name);
|
|
|
|
fprintf(out_file, "%*s\"version_id\": %d,\n", indent, "",
|
|
|
|
vmsd->version_id);
|
|
|
|
fprintf(out_file, "%*s\"minimum_version_id\": %d", indent, "",
|
|
|
|
vmsd->minimum_version_id);
|
|
|
|
if (vmsd->fields != NULL) {
|
|
|
|
const VMStateField *field = vmsd->fields;
|
|
|
|
bool first;
|
|
|
|
|
|
|
|
fprintf(out_file, ",\n%*s\"Fields\": [\n", indent, "");
|
|
|
|
first = true;
|
|
|
|
while (field->name != NULL) {
|
|
|
|
if (field->flags & VMS_MUST_EXIST) {
|
|
|
|
/* Ignore VMSTATE_VALIDATE bits; these don't get migrated */
|
|
|
|
field++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (!first) {
|
|
|
|
fprintf(out_file, ",\n");
|
|
|
|
}
|
|
|
|
dump_vmstate_vmsf(out_file, field, indent + 2);
|
|
|
|
field++;
|
|
|
|
first = false;
|
|
|
|
}
|
|
|
|
fprintf(out_file, "\n%*s]", indent, "");
|
|
|
|
}
|
|
|
|
if (vmsd->subsections != NULL) {
|
2014-09-23 16:09:54 +04:00
|
|
|
const VMStateDescription **subsection = vmsd->subsections;
|
2014-06-20 17:26:08 +04:00
|
|
|
bool first;
|
|
|
|
|
|
|
|
fprintf(out_file, ",\n%*s\"Subsections\": [\n", indent, "");
|
|
|
|
first = true;
|
2014-09-23 16:09:54 +04:00
|
|
|
while (*subsection != NULL) {
|
2014-06-20 17:26:08 +04:00
|
|
|
if (!first) {
|
|
|
|
fprintf(out_file, ",\n");
|
|
|
|
}
|
|
|
|
dump_vmstate_vmss(out_file, subsection, indent + 2);
|
|
|
|
subsection++;
|
|
|
|
first = false;
|
|
|
|
}
|
|
|
|
fprintf(out_file, "\n%*s]", indent, "");
|
|
|
|
}
|
|
|
|
fprintf(out_file, "\n%*s}", indent - 2, "");
|
|
|
|
}
|
|
|
|
|
|
|
|
static void dump_machine_type(FILE *out_file)
|
|
|
|
{
|
|
|
|
MachineClass *mc;
|
|
|
|
|
|
|
|
mc = MACHINE_GET_CLASS(current_machine);
|
|
|
|
|
|
|
|
fprintf(out_file, " \"vmschkmachine\": {\n");
|
|
|
|
fprintf(out_file, " \"Name\": \"%s\"\n", mc->name);
|
|
|
|
fprintf(out_file, " },\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
void dump_vmstate_json_to_file(FILE *out_file)
|
|
|
|
{
|
|
|
|
GSList *list, *elt;
|
|
|
|
bool first;
|
|
|
|
|
|
|
|
fprintf(out_file, "{\n");
|
|
|
|
dump_machine_type(out_file);
|
|
|
|
|
|
|
|
first = true;
|
|
|
|
list = object_class_get_list(TYPE_DEVICE, true);
|
|
|
|
for (elt = list; elt; elt = elt->next) {
|
|
|
|
DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
|
|
|
|
TYPE_DEVICE);
|
|
|
|
const char *name;
|
|
|
|
int indent = 2;
|
|
|
|
|
|
|
|
if (!dc->vmsd) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!first) {
|
|
|
|
fprintf(out_file, ",\n");
|
|
|
|
}
|
|
|
|
name = object_class_get_name(OBJECT_CLASS(dc));
|
|
|
|
fprintf(out_file, "%*s\"%s\": {\n", indent, "", name);
|
|
|
|
indent += 2;
|
|
|
|
fprintf(out_file, "%*s\"Name\": \"%s\",\n", indent, "", name);
|
|
|
|
fprintf(out_file, "%*s\"version_id\": %d,\n", indent, "",
|
|
|
|
dc->vmsd->version_id);
|
|
|
|
fprintf(out_file, "%*s\"minimum_version_id\": %d,\n", indent, "",
|
|
|
|
dc->vmsd->minimum_version_id);
|
|
|
|
|
|
|
|
dump_vmstate_vmsd(out_file, dc->vmsd, indent, false);
|
|
|
|
|
|
|
|
fprintf(out_file, "\n%*s}", indent - 2, "");
|
|
|
|
first = false;
|
|
|
|
}
|
|
|
|
fprintf(out_file, "\n}\n");
|
|
|
|
fclose(out_file);
|
|
|
|
}
|
|
|
|
|
2009-09-01 04:12:31 +04:00
|
|
|
static int calculate_new_instance_id(const char *idstr)
|
|
|
|
{
|
|
|
|
SaveStateEntry *se;
|
|
|
|
int instance_id = 0;
|
|
|
|
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
2009-09-01 04:12:31 +04:00
|
|
|
if (strcmp(idstr, se->idstr) == 0
|
|
|
|
&& instance_id <= se->instance_id) {
|
|
|
|
instance_id = se->instance_id + 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return instance_id;
|
|
|
|
}
|
|
|
|
|
2010-06-25 21:09:14 +04:00
|
|
|
static int calculate_compat_instance_id(const char *idstr)
|
|
|
|
{
|
|
|
|
SaveStateEntry *se;
|
|
|
|
int instance_id = 0;
|
|
|
|
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
2013-11-28 18:01:13 +04:00
|
|
|
if (!se->compat) {
|
2010-06-25 21:09:14 +04:00
|
|
|
continue;
|
2013-11-28 18:01:13 +04:00
|
|
|
}
|
2010-06-25 21:09:14 +04:00
|
|
|
|
|
|
|
if (strcmp(idstr, se->compat->idstr) == 0
|
|
|
|
&& instance_id <= se->compat->instance_id) {
|
|
|
|
instance_id = se->compat->instance_id + 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return instance_id;
|
|
|
|
}
|
|
|
|
|
2017-01-06 07:06:12 +03:00
|
|
|
static inline MigrationPriority save_state_priority(SaveStateEntry *se)
|
|
|
|
{
|
|
|
|
if (se->vmsd) {
|
|
|
|
return se->vmsd->priority;
|
|
|
|
}
|
|
|
|
return MIG_PRI_DEFAULT;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void savevm_state_handler_insert(SaveStateEntry *nse)
|
|
|
|
{
|
|
|
|
MigrationPriority priority = save_state_priority(nse);
|
|
|
|
SaveStateEntry *se;
|
|
|
|
|
|
|
|
assert(priority <= MIG_PRI_MAX);
|
|
|
|
|
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
|
|
|
if (save_state_priority(se) < priority) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (se) {
|
|
|
|
QTAILQ_INSERT_BEFORE(se, nse, entry);
|
|
|
|
} else {
|
|
|
|
QTAILQ_INSERT_TAIL(&savevm_state.handlers, nse, entry);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-11-12 00:33:36 +03:00
|
|
|
/* TODO: Individual devices generally have very little idea about the rest
|
|
|
|
of the system, so instance_id should be removed/replaced.
|
|
|
|
Meanwhile pass -1 as instance_id if you do not already have a clearly
|
|
|
|
distinguishing id for all instances of your device class. */
|
2010-06-25 21:09:07 +04:00
|
|
|
int register_savevm_live(DeviceState *dev,
|
|
|
|
const char *idstr,
|
2008-11-12 00:33:36 +03:00
|
|
|
int instance_id,
|
|
|
|
int version_id,
|
2012-06-26 20:46:10 +04:00
|
|
|
SaveVMHandlers *ops,
|
2008-11-12 00:33:36 +03:00
|
|
|
void *opaque)
|
|
|
|
{
|
2009-09-01 04:12:31 +04:00
|
|
|
SaveStateEntry *se;
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2015-09-14 14:51:31 +03:00
|
|
|
se = g_new0(SaveStateEntry, 1);
|
2008-11-12 00:33:36 +03:00
|
|
|
se->version_id = version_id;
|
2015-05-13 14:37:04 +03:00
|
|
|
se->section_id = savevm_state.global_section_id++;
|
2012-06-26 20:46:10 +04:00
|
|
|
se->ops = ops;
|
2008-11-12 00:33:36 +03:00
|
|
|
se->opaque = opaque;
|
2009-08-20 21:42:25 +04:00
|
|
|
se->vmsd = NULL;
|
2012-01-25 16:24:51 +04:00
|
|
|
/* if this is a live_savem then set is_ram */
|
2012-06-28 17:31:37 +04:00
|
|
|
if (ops->save_live_setup != NULL) {
|
2012-01-25 16:24:51 +04:00
|
|
|
se->is_ram = 1;
|
|
|
|
}
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2012-02-03 22:28:43 +04:00
|
|
|
if (dev) {
|
|
|
|
char *id = qdev_get_dev_path(dev);
|
2010-06-25 21:09:14 +04:00
|
|
|
if (id) {
|
2017-02-02 15:59:55 +03:00
|
|
|
if (snprintf(se->idstr, sizeof(se->idstr), "%s/", id) >=
|
|
|
|
sizeof(se->idstr)) {
|
|
|
|
error_report("Path too long for VMState (%s)", id);
|
|
|
|
g_free(id);
|
|
|
|
g_free(se);
|
|
|
|
|
|
|
|
return -1;
|
|
|
|
}
|
2011-08-21 07:09:37 +04:00
|
|
|
g_free(id);
|
2010-06-25 21:09:14 +04:00
|
|
|
|
2015-09-14 14:51:31 +03:00
|
|
|
se->compat = g_new0(CompatEntry, 1);
|
2010-06-25 21:09:14 +04:00
|
|
|
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr);
|
|
|
|
se->compat->instance_id = instance_id == -1 ?
|
|
|
|
calculate_compat_instance_id(idstr) : instance_id;
|
|
|
|
instance_id = -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
pstrcat(se->idstr, sizeof(se->idstr), idstr);
|
|
|
|
|
2009-09-01 04:12:31 +04:00
|
|
|
if (instance_id == -1) {
|
2010-06-25 21:09:14 +04:00
|
|
|
se->instance_id = calculate_new_instance_id(se->idstr);
|
2009-09-01 04:12:31 +04:00
|
|
|
} else {
|
|
|
|
se->instance_id = instance_id;
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
2010-06-25 21:09:14 +04:00
|
|
|
assert(!se->compat || se->instance_id == 0);
|
2017-01-06 07:06:12 +03:00
|
|
|
savevm_state_handler_insert(se);
|
2008-11-12 00:33:36 +03:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-06-25 21:09:07 +04:00
|
|
|
int register_savevm(DeviceState *dev,
|
|
|
|
const char *idstr,
|
2008-11-12 00:33:36 +03:00
|
|
|
int instance_id,
|
|
|
|
int version_id,
|
|
|
|
SaveStateHandler *save_state,
|
|
|
|
LoadStateHandler *load_state,
|
|
|
|
void *opaque)
|
|
|
|
{
|
2015-09-14 14:51:31 +03:00
|
|
|
SaveVMHandlers *ops = g_new0(SaveVMHandlers, 1);
|
2012-06-26 20:46:10 +04:00
|
|
|
ops->save_state = save_state;
|
|
|
|
ops->load_state = load_state;
|
2010-06-25 21:09:07 +04:00
|
|
|
return register_savevm_live(dev, idstr, instance_id, version_id,
|
2012-06-26 20:46:10 +04:00
|
|
|
ops, opaque);
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
|
2010-06-25 21:09:07 +04:00
|
|
|
void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque)
|
2009-04-17 21:10:59 +04:00
|
|
|
{
|
2009-09-01 04:12:31 +04:00
|
|
|
SaveStateEntry *se, *new_se;
|
2010-06-25 21:09:14 +04:00
|
|
|
char id[256] = "";
|
|
|
|
|
2012-02-03 22:28:43 +04:00
|
|
|
if (dev) {
|
|
|
|
char *path = qdev_get_dev_path(dev);
|
2010-06-25 21:09:14 +04:00
|
|
|
if (path) {
|
|
|
|
pstrcpy(id, sizeof(id), path);
|
|
|
|
pstrcat(id, sizeof(id), "/");
|
2011-08-21 07:09:37 +04:00
|
|
|
g_free(path);
|
2010-06-25 21:09:14 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
pstrcat(id, sizeof(id), idstr);
|
2009-04-17 21:10:59 +04:00
|
|
|
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH_SAFE(se, &savevm_state.handlers, entry, new_se) {
|
2010-06-25 21:09:14 +04:00
|
|
|
if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_REMOVE(&savevm_state.handlers, se, entry);
|
2015-08-26 14:17:18 +03:00
|
|
|
g_free(se->compat);
|
2012-06-26 19:19:10 +04:00
|
|
|
g_free(se->ops);
|
2011-08-21 07:09:37 +04:00
|
|
|
g_free(se);
|
2009-04-17 21:10:59 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-06-25 21:09:07 +04:00
|
|
|
int vmstate_register_with_alias_id(DeviceState *dev, int instance_id,
|
2010-05-15 15:32:40 +04:00
|
|
|
const VMStateDescription *vmsd,
|
|
|
|
void *opaque, int alias_id,
|
2017-02-02 15:59:54 +03:00
|
|
|
int required_for_version,
|
|
|
|
Error **errp)
|
2009-08-20 21:42:25 +04:00
|
|
|
{
|
2009-09-01 04:12:31 +04:00
|
|
|
SaveStateEntry *se;
|
2009-08-20 21:42:25 +04:00
|
|
|
|
2010-05-15 15:32:40 +04:00
|
|
|
/* If this triggers, alias support can be dropped for the vmsd. */
|
|
|
|
assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
|
|
|
|
|
2015-09-14 14:51:31 +03:00
|
|
|
se = g_new0(SaveStateEntry, 1);
|
2009-08-20 21:42:25 +04:00
|
|
|
se->version_id = vmsd->version_id;
|
2015-05-13 14:37:04 +03:00
|
|
|
se->section_id = savevm_state.global_section_id++;
|
2009-08-20 21:42:25 +04:00
|
|
|
se->opaque = opaque;
|
|
|
|
se->vmsd = vmsd;
|
2010-05-15 15:32:40 +04:00
|
|
|
se->alias_id = alias_id;
|
2009-08-20 21:42:25 +04:00
|
|
|
|
2012-02-03 22:28:43 +04:00
|
|
|
if (dev) {
|
|
|
|
char *id = qdev_get_dev_path(dev);
|
2010-06-25 21:09:14 +04:00
|
|
|
if (id) {
|
2017-02-02 15:59:55 +03:00
|
|
|
if (snprintf(se->idstr, sizeof(se->idstr), "%s/", id) >=
|
|
|
|
sizeof(se->idstr)) {
|
|
|
|
error_setg(errp, "Path too long for VMState (%s)", id);
|
|
|
|
g_free(id);
|
|
|
|
g_free(se);
|
|
|
|
|
|
|
|
return -1;
|
|
|
|
}
|
2017-02-21 17:14:51 +03:00
|
|
|
g_free(id);
|
2010-06-25 21:09:14 +04:00
|
|
|
|
2015-09-14 14:51:31 +03:00
|
|
|
se->compat = g_new0(CompatEntry, 1);
|
2010-06-25 21:09:14 +04:00
|
|
|
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name);
|
|
|
|
se->compat->instance_id = instance_id == -1 ?
|
|
|
|
calculate_compat_instance_id(vmsd->name) : instance_id;
|
|
|
|
instance_id = -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
pstrcat(se->idstr, sizeof(se->idstr), vmsd->name);
|
|
|
|
|
2009-09-01 04:12:31 +04:00
|
|
|
if (instance_id == -1) {
|
2010-06-25 21:09:14 +04:00
|
|
|
se->instance_id = calculate_new_instance_id(se->idstr);
|
2009-09-01 04:12:31 +04:00
|
|
|
} else {
|
|
|
|
se->instance_id = instance_id;
|
2009-08-20 21:42:25 +04:00
|
|
|
}
|
2010-06-25 21:09:14 +04:00
|
|
|
assert(!se->compat || se->instance_id == 0);
|
2017-01-06 07:06:12 +03:00
|
|
|
savevm_state_handler_insert(se);
|
2009-08-20 21:42:25 +04:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-06-25 21:09:07 +04:00
|
|
|
void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd,
|
|
|
|
void *opaque)
|
2009-08-20 21:42:25 +04:00
|
|
|
{
|
2009-09-10 05:04:29 +04:00
|
|
|
SaveStateEntry *se, *new_se;
|
|
|
|
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH_SAFE(se, &savevm_state.handlers, entry, new_se) {
|
2009-09-10 05:04:29 +04:00
|
|
|
if (se->vmsd == vmsd && se->opaque == opaque) {
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_REMOVE(&savevm_state.handlers, se, entry);
|
2015-08-26 14:17:18 +03:00
|
|
|
g_free(se->compat);
|
2011-08-21 07:09:37 +04:00
|
|
|
g_free(se);
|
2009-09-10 05:04:29 +04:00
|
|
|
}
|
|
|
|
}
|
2009-08-20 21:42:25 +04:00
|
|
|
}
|
|
|
|
|
2009-08-20 21:42:24 +04:00
|
|
|
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id)
|
|
|
|
{
|
2014-03-11 03:42:29 +04:00
|
|
|
trace_vmstate_load(se->idstr, se->vmsd ? se->vmsd->name : "(old)");
|
2009-08-20 21:42:25 +04:00
|
|
|
if (!se->vmsd) { /* Old style */
|
2012-06-26 19:19:10 +04:00
|
|
|
return se->ops->load_state(f, se->opaque, version_id);
|
2009-08-20 21:42:25 +04:00
|
|
|
}
|
|
|
|
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
2009-08-20 21:42:24 +04:00
|
|
|
}
|
|
|
|
|
2015-01-22 17:01:39 +03:00
|
|
|
static void vmstate_save_old_style(QEMUFile *f, SaveStateEntry *se, QJSON *vmdesc)
|
|
|
|
{
|
|
|
|
int64_t old_offset, size;
|
|
|
|
|
|
|
|
old_offset = qemu_ftell_fast(f);
|
|
|
|
se->ops->save_state(f, se->opaque);
|
|
|
|
size = qemu_ftell_fast(f) - old_offset;
|
|
|
|
|
|
|
|
if (vmdesc) {
|
|
|
|
json_prop_int(vmdesc, "size", size);
|
|
|
|
json_start_array(vmdesc, "fields");
|
|
|
|
json_start_object(vmdesc, NULL);
|
|
|
|
json_prop_str(vmdesc, "name", "data");
|
|
|
|
json_prop_int(vmdesc, "size", size);
|
|
|
|
json_prop_str(vmdesc, "type", "buffer");
|
|
|
|
json_end_object(vmdesc);
|
|
|
|
json_end_array(vmdesc);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void vmstate_save(QEMUFile *f, SaveStateEntry *se, QJSON *vmdesc)
|
2009-08-20 21:42:24 +04:00
|
|
|
{
|
2014-03-11 03:42:29 +04:00
|
|
|
trace_vmstate_save(se->idstr, se->vmsd ? se->vmsd->name : "(old)");
|
2015-01-22 17:01:39 +03:00
|
|
|
if (!se->vmsd) {
|
|
|
|
vmstate_save_old_style(f, se, vmdesc);
|
2011-01-12 00:39:43 +03:00
|
|
|
return;
|
2009-08-20 21:42:25 +04:00
|
|
|
}
|
2015-01-22 17:01:39 +03:00
|
|
|
vmstate_save_state(f, se->vmsd, se->opaque, vmdesc);
|
2009-08-20 21:42:24 +04:00
|
|
|
}
|
|
|
|
|
2015-05-19 14:29:51 +03:00
|
|
|
void savevm_skip_section_footers(void)
|
|
|
|
{
|
|
|
|
skip_section_footers = true;
|
|
|
|
}
|
|
|
|
|
2015-05-19 14:29:50 +03:00
|
|
|
/*
|
|
|
|
* Write the header for device section (QEMU_VM_SECTION START/END/PART/FULL)
|
|
|
|
*/
|
|
|
|
static void save_section_header(QEMUFile *f, SaveStateEntry *se,
|
|
|
|
uint8_t section_type)
|
|
|
|
{
|
|
|
|
qemu_put_byte(f, section_type);
|
|
|
|
qemu_put_be32(f, se->section_id);
|
|
|
|
|
|
|
|
if (section_type == QEMU_VM_SECTION_FULL ||
|
|
|
|
section_type == QEMU_VM_SECTION_START) {
|
|
|
|
/* ID string */
|
|
|
|
size_t len = strlen(se->idstr);
|
|
|
|
qemu_put_byte(f, len);
|
|
|
|
qemu_put_buffer(f, (uint8_t *)se->idstr, len);
|
|
|
|
|
|
|
|
qemu_put_be32(f, se->instance_id);
|
|
|
|
qemu_put_be32(f, se->version_id);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-05-19 14:29:52 +03:00
|
|
|
/*
|
|
|
|
* Write a footer onto device sections that catches cases misformatted device
|
|
|
|
* sections.
|
|
|
|
*/
|
|
|
|
static void save_section_footer(QEMUFile *f, SaveStateEntry *se)
|
|
|
|
{
|
|
|
|
if (!skip_section_footers) {
|
|
|
|
qemu_put_byte(f, QEMU_VM_SECTION_FOOTER);
|
|
|
|
qemu_put_be32(f, se->section_id);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-11-05 21:10:45 +03:00
|
|
|
/**
|
|
|
|
* qemu_savevm_command_send: Send a 'QEMU_VM_COMMAND' type element with the
|
|
|
|
* command and associated data.
|
|
|
|
*
|
|
|
|
* @f: File to send command on
|
|
|
|
* @command: Command type to send
|
|
|
|
* @len: Length of associated data
|
|
|
|
* @data: Data associated with command.
|
|
|
|
*/
|
|
|
|
void qemu_savevm_command_send(QEMUFile *f,
|
|
|
|
enum qemu_vm_cmd command,
|
|
|
|
uint16_t len,
|
|
|
|
uint8_t *data)
|
|
|
|
{
|
|
|
|
trace_savevm_command_send(command, len);
|
|
|
|
qemu_put_byte(f, QEMU_VM_COMMAND);
|
|
|
|
qemu_put_be16(f, (uint16_t)command);
|
|
|
|
qemu_put_be16(f, len);
|
|
|
|
qemu_put_buffer(f, data, len);
|
|
|
|
qemu_fflush(f);
|
|
|
|
}
|
|
|
|
|
2015-11-05 21:10:46 +03:00
|
|
|
void qemu_savevm_send_ping(QEMUFile *f, uint32_t value)
|
|
|
|
{
|
|
|
|
uint32_t buf;
|
|
|
|
|
|
|
|
trace_savevm_send_ping(value);
|
|
|
|
buf = cpu_to_be32(value);
|
|
|
|
qemu_savevm_command_send(f, MIG_CMD_PING, sizeof(value), (uint8_t *)&buf);
|
|
|
|
}
|
|
|
|
|
|
|
|
void qemu_savevm_send_open_return_path(QEMUFile *f)
|
|
|
|
{
|
|
|
|
trace_savevm_send_open_return_path();
|
|
|
|
qemu_savevm_command_send(f, MIG_CMD_OPEN_RETURN_PATH, 0, NULL);
|
|
|
|
}
|
|
|
|
|
2015-11-05 21:10:53 +03:00
|
|
|
/* We have a buffer of data to send; we don't want that all to be loaded
|
|
|
|
* by the command itself, so the command contains just the length of the
|
|
|
|
* extra buffer that we then send straight after it.
|
|
|
|
* TODO: Must be a better way to organise that
|
|
|
|
*
|
|
|
|
* Returns:
|
|
|
|
* 0 on success
|
|
|
|
* -ve on error
|
|
|
|
*/
|
2016-04-27 13:05:01 +03:00
|
|
|
int qemu_savevm_send_packaged(QEMUFile *f, const uint8_t *buf, size_t len)
|
2015-11-05 21:10:53 +03:00
|
|
|
{
|
|
|
|
uint32_t tmp;
|
|
|
|
|
|
|
|
if (len > MAX_VM_CMD_PACKAGED_SIZE) {
|
|
|
|
error_report("%s: Unreasonably large packaged state: %zu",
|
|
|
|
__func__, len);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
tmp = cpu_to_be32(len);
|
|
|
|
|
|
|
|
trace_qemu_savevm_send_packaged();
|
|
|
|
qemu_savevm_command_send(f, MIG_CMD_PACKAGED, 4, (uint8_t *)&tmp);
|
|
|
|
|
2016-04-27 13:05:01 +03:00
|
|
|
qemu_put_buffer(f, buf, len);
|
2015-11-05 21:10:53 +03:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-11-05 21:10:52 +03:00
|
|
|
/* Send prior to any postcopy transfer */
|
|
|
|
void qemu_savevm_send_postcopy_advise(QEMUFile *f)
|
|
|
|
{
|
|
|
|
uint64_t tmp[2];
|
2017-02-24 21:28:29 +03:00
|
|
|
tmp[0] = cpu_to_be64(ram_pagesize_summary());
|
2015-11-05 21:10:52 +03:00
|
|
|
tmp[1] = cpu_to_be64(1ul << qemu_target_page_bits());
|
|
|
|
|
|
|
|
trace_qemu_savevm_send_postcopy_advise();
|
|
|
|
qemu_savevm_command_send(f, MIG_CMD_POSTCOPY_ADVISE, 16, (uint8_t *)tmp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Sent prior to starting the destination running in postcopy, discard pages
|
|
|
|
* that have already been sent but redirtied on the source.
|
|
|
|
* CMD_POSTCOPY_RAM_DISCARD consist of:
|
|
|
|
* byte version (0)
|
|
|
|
* byte Length of name field (not including 0)
|
|
|
|
* n x byte RAM block name
|
|
|
|
* byte 0 terminator (just for safety)
|
|
|
|
* n x Byte ranges within the named RAMBlock
|
|
|
|
* be64 Start of the range
|
|
|
|
* be64 Length
|
|
|
|
*
|
|
|
|
* name: RAMBlock name that these entries are part of
|
|
|
|
* len: Number of page entries
|
|
|
|
* start_list: 'len' addresses
|
|
|
|
* length_list: 'len' addresses
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
void qemu_savevm_send_postcopy_ram_discard(QEMUFile *f, const char *name,
|
|
|
|
uint16_t len,
|
|
|
|
uint64_t *start_list,
|
|
|
|
uint64_t *length_list)
|
|
|
|
{
|
|
|
|
uint8_t *buf;
|
|
|
|
uint16_t tmplen;
|
|
|
|
uint16_t t;
|
|
|
|
size_t name_len = strlen(name);
|
|
|
|
|
|
|
|
trace_qemu_savevm_send_postcopy_ram_discard(name, len);
|
|
|
|
assert(name_len < 256);
|
|
|
|
buf = g_malloc0(1 + 1 + name_len + 1 + (8 + 8) * len);
|
|
|
|
buf[0] = postcopy_ram_discard_version;
|
|
|
|
buf[1] = name_len;
|
|
|
|
memcpy(buf + 2, name, name_len);
|
|
|
|
tmplen = 2 + name_len;
|
|
|
|
buf[tmplen++] = '\0';
|
|
|
|
|
|
|
|
for (t = 0; t < len; t++) {
|
2016-06-10 19:09:22 +03:00
|
|
|
stq_be_p(buf + tmplen, start_list[t]);
|
2015-11-05 21:10:52 +03:00
|
|
|
tmplen += 8;
|
2016-06-10 19:09:22 +03:00
|
|
|
stq_be_p(buf + tmplen, length_list[t]);
|
2015-11-05 21:10:52 +03:00
|
|
|
tmplen += 8;
|
|
|
|
}
|
|
|
|
qemu_savevm_command_send(f, MIG_CMD_POSTCOPY_RAM_DISCARD, tmplen, buf);
|
|
|
|
g_free(buf);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Get the destination into a state where it can receive postcopy data. */
|
|
|
|
void qemu_savevm_send_postcopy_listen(QEMUFile *f)
|
|
|
|
{
|
|
|
|
trace_savevm_send_postcopy_listen();
|
|
|
|
qemu_savevm_command_send(f, MIG_CMD_POSTCOPY_LISTEN, 0, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Kick the destination into running */
|
|
|
|
void qemu_savevm_send_postcopy_run(QEMUFile *f)
|
|
|
|
{
|
|
|
|
trace_savevm_send_postcopy_run();
|
|
|
|
qemu_savevm_command_send(f, MIG_CMD_POSTCOPY_RUN, 0, NULL);
|
|
|
|
}
|
|
|
|
|
2011-12-05 20:48:01 +04:00
|
|
|
bool qemu_savevm_state_blocked(Error **errp)
|
2011-01-12 00:39:43 +03:00
|
|
|
{
|
|
|
|
SaveStateEntry *se;
|
|
|
|
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
2014-05-14 23:30:08 +04:00
|
|
|
if (se->vmsd && se->vmsd->unmigratable) {
|
2014-03-22 03:42:26 +04:00
|
|
|
error_setg(errp, "State blocked by non-migratable device '%s'",
|
|
|
|
se->idstr);
|
2011-01-12 00:39:43 +03:00
|
|
|
return true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2016-02-18 14:32:25 +03:00
|
|
|
static bool enforce_config_section(void)
|
|
|
|
{
|
|
|
|
MachineState *machine = MACHINE(qdev_get_machine());
|
|
|
|
return machine->enforce_config_section;
|
|
|
|
}
|
|
|
|
|
2015-05-21 15:24:12 +03:00
|
|
|
void qemu_savevm_state_header(QEMUFile *f)
|
|
|
|
{
|
|
|
|
trace_savevm_state_header();
|
|
|
|
qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
|
|
|
|
qemu_put_be32(f, QEMU_VM_FILE_VERSION);
|
2015-11-05 21:10:30 +03:00
|
|
|
|
2016-02-18 14:32:25 +03:00
|
|
|
if (!savevm_state.skip_configuration || enforce_config_section()) {
|
2015-11-05 21:10:30 +03:00
|
|
|
qemu_put_byte(f, QEMU_VM_CONFIGURATION);
|
|
|
|
vmstate_save_state(f, &vmstate_configuration, &savevm_state, 0);
|
|
|
|
}
|
|
|
|
|
2015-05-21 15:24:12 +03:00
|
|
|
}
|
|
|
|
|
2013-02-22 20:36:13 +04:00
|
|
|
void qemu_savevm_state_begin(QEMUFile *f,
|
|
|
|
const MigrationParams *params)
|
2008-11-12 00:33:36 +03:00
|
|
|
{
|
|
|
|
SaveStateEntry *se;
|
2011-09-22 13:02:14 +04:00
|
|
|
int ret;
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2014-03-11 03:42:29 +04:00
|
|
|
trace_savevm_state_begin();
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
2012-06-26 19:19:10 +04:00
|
|
|
if (!se->ops || !se->ops->set_params) {
|
2009-11-02 16:40:58 +03:00
|
|
|
continue;
|
2012-06-19 19:43:09 +04:00
|
|
|
}
|
2012-06-26 19:19:10 +04:00
|
|
|
se->ops->set_params(params, se->opaque);
|
2009-11-02 16:40:58 +03:00
|
|
|
}
|
2013-11-28 18:01:13 +04:00
|
|
|
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
2012-06-28 17:11:57 +04:00
|
|
|
if (!se->ops || !se->ops->save_live_setup) {
|
2008-11-12 00:33:36 +03:00
|
|
|
continue;
|
2012-06-26 19:19:10 +04:00
|
|
|
}
|
2012-06-27 12:59:15 +04:00
|
|
|
if (se->ops && se->ops->is_active) {
|
|
|
|
if (!se->ops->is_active(se->opaque)) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
2015-05-19 14:29:50 +03:00
|
|
|
save_section_header(f, se, QEMU_VM_SECTION_START);
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2012-06-28 17:11:57 +04:00
|
|
|
ret = se->ops->save_live_setup(f, se->opaque);
|
2015-05-19 14:29:52 +03:00
|
|
|
save_section_footer(f, se);
|
2011-10-19 17:22:18 +04:00
|
|
|
if (ret < 0) {
|
2013-02-22 20:36:13 +04:00
|
|
|
qemu_file_set_error(f, ret);
|
|
|
|
break;
|
2011-10-19 17:22:18 +04:00
|
|
|
}
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-09-22 13:02:14 +04:00
|
|
|
/*
|
2011-11-22 14:06:26 +04:00
|
|
|
* this function has three return values:
|
2011-09-22 13:02:14 +04:00
|
|
|
* negative: there was one error, and we have -errno.
|
|
|
|
* 0 : We haven't finished, caller have to go again
|
|
|
|
* 1 : We have finished, we can go to complete phase
|
|
|
|
*/
|
2015-11-05 21:11:14 +03:00
|
|
|
int qemu_savevm_state_iterate(QEMUFile *f, bool postcopy)
|
2008-11-12 00:33:36 +03:00
|
|
|
{
|
|
|
|
SaveStateEntry *se;
|
|
|
|
int ret = 1;
|
|
|
|
|
2014-03-11 03:42:29 +04:00
|
|
|
trace_savevm_state_iterate();
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
2012-06-28 17:31:37 +04:00
|
|
|
if (!se->ops || !se->ops->save_live_iterate) {
|
2008-11-12 00:33:36 +03:00
|
|
|
continue;
|
2012-06-26 19:19:10 +04:00
|
|
|
}
|
2012-06-27 12:59:15 +04:00
|
|
|
if (se->ops && se->ops->is_active) {
|
|
|
|
if (!se->ops->is_active(se->opaque)) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
2015-11-05 21:11:14 +03:00
|
|
|
/*
|
|
|
|
* In the postcopy phase, any device that doesn't know how to
|
|
|
|
* do postcopy should have saved it's state in the _complete
|
|
|
|
* call that's already run, it might get confused if we call
|
|
|
|
* iterate afterwards.
|
|
|
|
*/
|
|
|
|
if (postcopy && !se->ops->save_live_complete_postcopy) {
|
|
|
|
continue;
|
|
|
|
}
|
2012-05-22 02:38:26 +04:00
|
|
|
if (qemu_file_rate_limit(f)) {
|
|
|
|
return 0;
|
|
|
|
}
|
2014-03-07 00:03:37 +04:00
|
|
|
trace_savevm_section_start(se->idstr, se->section_id);
|
2015-05-19 14:29:50 +03:00
|
|
|
|
|
|
|
save_section_header(f, se, QEMU_VM_SECTION_PART);
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2012-06-28 17:31:37 +04:00
|
|
|
ret = se->ops->save_live_iterate(f, se->opaque);
|
2015-01-21 13:14:48 +03:00
|
|
|
trace_savevm_section_end(se->idstr, se->section_id, ret);
|
2015-05-19 14:29:52 +03:00
|
|
|
save_section_footer(f, se);
|
2012-05-22 01:46:44 +04:00
|
|
|
|
2013-02-22 20:36:13 +04:00
|
|
|
if (ret < 0) {
|
|
|
|
qemu_file_set_error(f, ret);
|
|
|
|
}
|
2011-10-19 17:22:18 +04:00
|
|
|
if (ret <= 0) {
|
2009-12-01 17:19:55 +03:00
|
|
|
/* Do not proceed to the next vmstate before this one reported
|
|
|
|
completion of the current stage. This serializes the migration
|
|
|
|
and reduces the probability that a faster changing state is
|
|
|
|
synchronized over and over again. */
|
|
|
|
break;
|
|
|
|
}
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
2011-09-22 13:02:14 +04:00
|
|
|
return ret;
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
|
2015-02-23 15:56:42 +03:00
|
|
|
static bool should_send_vmdesc(void)
|
|
|
|
{
|
|
|
|
MachineState *machine = MACHINE(qdev_get_machine());
|
2015-11-05 21:10:59 +03:00
|
|
|
bool in_postcopy = migration_in_postcopy(migrate_get_current());
|
|
|
|
return !machine->suppress_vmdesc && !in_postcopy;
|
2015-02-23 15:56:42 +03:00
|
|
|
}
|
|
|
|
|
2015-11-05 21:11:00 +03:00
|
|
|
/*
|
|
|
|
* Calls the save_live_complete_postcopy methods
|
|
|
|
* causing the last few pages to be sent immediately and doing any associated
|
|
|
|
* cleanup.
|
|
|
|
* Note postcopy also calls qemu_savevm_state_complete_precopy to complete
|
|
|
|
* all the other devices, but that happens at the point we switch to postcopy.
|
|
|
|
*/
|
|
|
|
void qemu_savevm_state_complete_postcopy(QEMUFile *f)
|
|
|
|
{
|
|
|
|
SaveStateEntry *se;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
|
|
|
if (!se->ops || !se->ops->save_live_complete_postcopy) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (se->ops && se->ops->is_active) {
|
|
|
|
if (!se->ops->is_active(se->opaque)) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
trace_savevm_section_start(se->idstr, se->section_id);
|
|
|
|
/* Section type */
|
|
|
|
qemu_put_byte(f, QEMU_VM_SECTION_END);
|
|
|
|
qemu_put_be32(f, se->section_id);
|
|
|
|
|
|
|
|
ret = se->ops->save_live_complete_postcopy(f, se->opaque);
|
|
|
|
trace_savevm_section_end(se->idstr, se->section_id, ret);
|
|
|
|
save_section_footer(f, se);
|
|
|
|
if (ret < 0) {
|
|
|
|
qemu_file_set_error(f, ret);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
qemu_put_byte(f, QEMU_VM_EOF);
|
|
|
|
qemu_fflush(f);
|
|
|
|
}
|
|
|
|
|
2015-11-11 17:02:27 +03:00
|
|
|
void qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only)
|
2008-11-12 00:33:36 +03:00
|
|
|
{
|
2015-01-22 17:01:39 +03:00
|
|
|
QJSON *vmdesc;
|
|
|
|
int vmdesc_len;
|
2008-11-12 00:33:36 +03:00
|
|
|
SaveStateEntry *se;
|
2011-10-19 17:22:18 +04:00
|
|
|
int ret;
|
2015-11-05 21:11:00 +03:00
|
|
|
bool in_postcopy = migration_in_postcopy(migrate_get_current());
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2015-11-05 21:10:41 +03:00
|
|
|
trace_savevm_state_complete_precopy();
|
2014-03-11 03:42:29 +04:00
|
|
|
|
2010-03-01 21:10:30 +03:00
|
|
|
cpu_synchronize_all_states();
|
|
|
|
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
2015-11-05 21:11:00 +03:00
|
|
|
if (!se->ops ||
|
|
|
|
(in_postcopy && se->ops->save_live_complete_postcopy) ||
|
2015-11-11 17:02:27 +03:00
|
|
|
(in_postcopy && !iterable_only) ||
|
2015-11-05 21:11:00 +03:00
|
|
|
!se->ops->save_live_complete_precopy) {
|
2008-11-12 00:33:36 +03:00
|
|
|
continue;
|
2012-06-26 19:19:10 +04:00
|
|
|
}
|
2015-11-11 17:02:27 +03:00
|
|
|
|
2012-06-27 12:59:15 +04:00
|
|
|
if (se->ops && se->ops->is_active) {
|
|
|
|
if (!se->ops->is_active(se->opaque)) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
2014-03-07 00:03:37 +04:00
|
|
|
trace_savevm_section_start(se->idstr, se->section_id);
|
2015-05-19 14:29:50 +03:00
|
|
|
|
|
|
|
save_section_header(f, se, QEMU_VM_SECTION_END);
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2015-11-05 21:10:41 +03:00
|
|
|
ret = se->ops->save_live_complete_precopy(f, se->opaque);
|
2015-01-21 13:14:48 +03:00
|
|
|
trace_savevm_section_end(se->idstr, se->section_id, ret);
|
2015-05-19 14:29:52 +03:00
|
|
|
save_section_footer(f, se);
|
2011-10-19 17:22:18 +04:00
|
|
|
if (ret < 0) {
|
2013-02-22 20:36:13 +04:00
|
|
|
qemu_file_set_error(f, ret);
|
|
|
|
return;
|
2011-10-19 17:22:18 +04:00
|
|
|
}
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
|
2015-11-11 17:02:27 +03:00
|
|
|
if (iterable_only) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2015-01-22 17:01:39 +03:00
|
|
|
vmdesc = qjson_new();
|
|
|
|
json_prop_int(vmdesc, "page_size", TARGET_PAGE_SIZE);
|
|
|
|
json_start_array(vmdesc, "devices");
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2012-06-26 19:19:10 +04:00
|
|
|
if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
|
2013-11-28 18:01:12 +04:00
|
|
|
continue;
|
2012-06-26 19:19:10 +04:00
|
|
|
}
|
2014-10-15 11:39:14 +04:00
|
|
|
if (se->vmsd && !vmstate_save_needed(se->vmsd, se->opaque)) {
|
|
|
|
trace_savevm_section_skip(se->idstr, se->section_id);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2014-03-07 00:03:37 +04:00
|
|
|
trace_savevm_section_start(se->idstr, se->section_id);
|
2015-01-22 17:01:39 +03:00
|
|
|
|
|
|
|
json_start_object(vmdesc, NULL);
|
|
|
|
json_prop_str(vmdesc, "name", se->idstr);
|
|
|
|
json_prop_int(vmdesc, "instance_id", se->instance_id);
|
|
|
|
|
2015-05-19 14:29:50 +03:00
|
|
|
save_section_header(f, se, QEMU_VM_SECTION_FULL);
|
2015-01-22 17:01:39 +03:00
|
|
|
vmstate_save(f, se, vmdesc);
|
2015-01-21 13:14:48 +03:00
|
|
|
trace_savevm_section_end(se->idstr, se->section_id, 0);
|
2015-05-19 14:29:52 +03:00
|
|
|
save_section_footer(f, se);
|
2016-02-05 01:50:30 +03:00
|
|
|
|
|
|
|
json_end_object(vmdesc);
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
|
2015-11-05 21:11:00 +03:00
|
|
|
if (!in_postcopy) {
|
|
|
|
/* Postcopy stream will still be going */
|
|
|
|
qemu_put_byte(f, QEMU_VM_EOF);
|
|
|
|
}
|
2015-01-22 17:01:39 +03:00
|
|
|
|
|
|
|
json_end_array(vmdesc);
|
|
|
|
qjson_finish(vmdesc);
|
|
|
|
vmdesc_len = strlen(qjson_get_str(vmdesc));
|
|
|
|
|
2015-02-23 15:56:42 +03:00
|
|
|
if (should_send_vmdesc()) {
|
|
|
|
qemu_put_byte(f, QEMU_VM_VMDESCRIPTION);
|
|
|
|
qemu_put_be32(f, vmdesc_len);
|
|
|
|
qemu_put_buffer(f, (uint8_t *)qjson_get_str(vmdesc), vmdesc_len);
|
|
|
|
}
|
2016-05-04 19:49:18 +03:00
|
|
|
qjson_destroy(vmdesc);
|
2015-01-22 17:01:39 +03:00
|
|
|
|
2013-02-22 20:36:29 +04:00
|
|
|
qemu_fflush(f);
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
|
2015-11-05 21:10:54 +03:00
|
|
|
/* Give an estimate of the amount left to be transferred,
|
|
|
|
* the result is split into the amount for units that can and
|
|
|
|
* for units that can't do postcopy.
|
|
|
|
*/
|
|
|
|
void qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size,
|
|
|
|
uint64_t *res_non_postcopiable,
|
|
|
|
uint64_t *res_postcopiable)
|
2012-09-21 13:18:18 +04:00
|
|
|
{
|
|
|
|
SaveStateEntry *se;
|
2015-11-05 21:10:54 +03:00
|
|
|
|
|
|
|
*res_non_postcopiable = 0;
|
|
|
|
*res_postcopiable = 0;
|
|
|
|
|
2012-09-21 13:18:18 +04:00
|
|
|
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
2012-09-21 13:18:18 +04:00
|
|
|
if (!se->ops || !se->ops->save_live_pending) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (se->ops && se->ops->is_active) {
|
|
|
|
if (!se->ops->is_active(se->opaque)) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
2015-11-05 21:10:54 +03:00
|
|
|
se->ops->save_live_pending(f, se->opaque, max_size,
|
|
|
|
res_non_postcopiable, res_postcopiable);
|
2012-09-21 13:18:18 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-11-02 10:37:01 +03:00
|
|
|
void qemu_savevm_state_cleanup(void)
|
2009-11-30 20:21:21 +03:00
|
|
|
{
|
|
|
|
SaveStateEntry *se;
|
|
|
|
|
2015-11-02 10:37:01 +03:00
|
|
|
trace_savevm_state_cleanup();
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
2015-11-02 10:37:02 +03:00
|
|
|
if (se->ops && se->ops->cleanup) {
|
|
|
|
se->ops->cleanup(se->opaque);
|
2009-11-30 20:21:21 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-02-10 16:25:02 +03:00
|
|
|
static int qemu_savevm_state(QEMUFile *f, Error **errp)
|
2008-11-12 00:33:36 +03:00
|
|
|
{
|
|
|
|
int ret;
|
2012-06-19 19:43:09 +04:00
|
|
|
MigrationParams params = {
|
|
|
|
.blk = 0,
|
|
|
|
.shared = 0
|
|
|
|
};
|
2015-11-05 21:10:40 +03:00
|
|
|
MigrationState *ms = migrate_init(¶ms);
|
2016-06-15 18:06:43 +03:00
|
|
|
MigrationStatus status;
|
2016-01-15 06:37:42 +03:00
|
|
|
ms->to_dst_file = f;
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2016-05-04 22:44:19 +03:00
|
|
|
if (migration_is_blocked(errp)) {
|
2016-06-15 18:06:43 +03:00
|
|
|
ret = -EINVAL;
|
|
|
|
goto done;
|
2011-01-12 00:39:43 +03:00
|
|
|
}
|
|
|
|
|
2013-02-22 20:36:28 +04:00
|
|
|
qemu_mutex_unlock_iothread();
|
2015-05-21 15:24:12 +03:00
|
|
|
qemu_savevm_state_header(f);
|
2013-02-22 20:36:13 +04:00
|
|
|
qemu_savevm_state_begin(f, ¶ms);
|
2013-02-22 20:36:28 +04:00
|
|
|
qemu_mutex_lock_iothread();
|
|
|
|
|
2013-02-22 20:36:13 +04:00
|
|
|
while (qemu_file_get_error(f) == 0) {
|
2015-11-05 21:11:14 +03:00
|
|
|
if (qemu_savevm_state_iterate(f, false) > 0) {
|
2013-02-22 20:36:13 +04:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2013-02-22 20:36:13 +04:00
|
|
|
ret = qemu_file_get_error(f);
|
2011-09-22 13:02:14 +04:00
|
|
|
if (ret == 0) {
|
2015-11-11 17:02:27 +03:00
|
|
|
qemu_savevm_state_complete_precopy(f, false);
|
2011-10-05 03:02:52 +04:00
|
|
|
ret = qemu_file_get_error(f);
|
2011-09-22 13:02:14 +04:00
|
|
|
}
|
2015-11-09 10:24:04 +03:00
|
|
|
qemu_savevm_state_cleanup();
|
2013-02-22 20:36:10 +04:00
|
|
|
if (ret != 0) {
|
2015-02-10 16:25:02 +03:00
|
|
|
error_setg_errno(errp, -ret, "Error while writing VM state");
|
2013-02-22 20:36:10 +04:00
|
|
|
}
|
2016-06-15 18:06:43 +03:00
|
|
|
|
|
|
|
done:
|
|
|
|
if (ret != 0) {
|
|
|
|
status = MIGRATION_STATUS_FAILED;
|
|
|
|
} else {
|
|
|
|
status = MIGRATION_STATUS_COMPLETED;
|
|
|
|
}
|
|
|
|
migrate_set_state(&ms->state, MIGRATION_STATUS_SETUP, status);
|
2017-02-25 22:31:55 +03:00
|
|
|
|
|
|
|
/* f is outer parameter, it should not stay in global migration state after
|
|
|
|
* this function finished */
|
|
|
|
ms->to_dst_file = NULL;
|
|
|
|
|
2008-11-12 00:33:36 +03:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-01-25 16:24:51 +04:00
|
|
|
static int qemu_save_device_state(QEMUFile *f)
|
|
|
|
{
|
|
|
|
SaveStateEntry *se;
|
|
|
|
|
|
|
|
qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
|
|
|
|
qemu_put_be32(f, QEMU_VM_FILE_VERSION);
|
|
|
|
|
|
|
|
cpu_synchronize_all_states();
|
|
|
|
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
2012-01-25 16:24:51 +04:00
|
|
|
if (se->is_ram) {
|
|
|
|
continue;
|
|
|
|
}
|
2012-06-26 19:19:10 +04:00
|
|
|
if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
|
2012-01-25 16:24:51 +04:00
|
|
|
continue;
|
|
|
|
}
|
2014-10-15 11:39:14 +04:00
|
|
|
if (se->vmsd && !vmstate_save_needed(se->vmsd, se->opaque)) {
|
|
|
|
continue;
|
|
|
|
}
|
2012-01-25 16:24:51 +04:00
|
|
|
|
2015-05-19 14:29:50 +03:00
|
|
|
save_section_header(f, se, QEMU_VM_SECTION_FULL);
|
2012-01-25 16:24:51 +04:00
|
|
|
|
2015-01-22 17:01:39 +03:00
|
|
|
vmstate_save(f, se, NULL);
|
2015-05-19 14:29:52 +03:00
|
|
|
|
|
|
|
save_section_footer(f, se);
|
2012-01-25 16:24:51 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
qemu_put_byte(f, QEMU_VM_EOF);
|
|
|
|
|
|
|
|
return qemu_file_get_error(f);
|
|
|
|
}
|
|
|
|
|
2008-11-12 00:33:36 +03:00
|
|
|
static SaveStateEntry *find_se(const char *idstr, int instance_id)
|
|
|
|
{
|
|
|
|
SaveStateEntry *se;
|
|
|
|
|
2015-05-13 14:37:04 +03:00
|
|
|
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
|
2008-11-12 00:33:36 +03:00
|
|
|
if (!strcmp(se->idstr, idstr) &&
|
2010-05-15 15:32:40 +04:00
|
|
|
(instance_id == se->instance_id ||
|
|
|
|
instance_id == se->alias_id))
|
2008-11-12 00:33:36 +03:00
|
|
|
return se;
|
2010-06-25 21:09:14 +04:00
|
|
|
/* Migrating from an older version? */
|
|
|
|
if (strstr(se->idstr, idstr) && se->compat) {
|
|
|
|
if (!strcmp(se->compat->idstr, idstr) &&
|
|
|
|
(instance_id == se->compat->instance_id ||
|
|
|
|
instance_id == se->alias_id))
|
|
|
|
return se;
|
|
|
|
}
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2015-11-05 21:10:50 +03:00
|
|
|
enum LoadVMExitCodes {
|
|
|
|
/* Allow a command to quit all layers of nested loadvm loops */
|
|
|
|
LOADVM_QUIT = 1,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int qemu_loadvm_state_main(QEMUFile *f, MigrationIncomingState *mis);
|
2015-11-05 21:10:52 +03:00
|
|
|
|
|
|
|
/* ------ incoming postcopy messages ------ */
|
|
|
|
/* 'advise' arrives before any transfers just to tell us that a postcopy
|
|
|
|
* *might* happen - it might be skipped if precopy transferred everything
|
|
|
|
* quickly.
|
|
|
|
*/
|
|
|
|
static int loadvm_postcopy_handle_advise(MigrationIncomingState *mis)
|
|
|
|
{
|
|
|
|
PostcopyState ps = postcopy_state_set(POSTCOPY_INCOMING_ADVISE);
|
2017-02-24 21:28:29 +03:00
|
|
|
uint64_t remote_pagesize_summary, local_pagesize_summary, remote_tps;
|
2015-11-05 21:10:52 +03:00
|
|
|
|
|
|
|
trace_loadvm_postcopy_handle_advise();
|
|
|
|
if (ps != POSTCOPY_INCOMING_NONE) {
|
|
|
|
error_report("CMD_POSTCOPY_ADVISE in wrong postcopy state (%d)", ps);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2015-11-05 21:10:55 +03:00
|
|
|
if (!postcopy_ram_supported_by_host()) {
|
2017-02-02 18:59:08 +03:00
|
|
|
postcopy_state_set(POSTCOPY_INCOMING_NONE);
|
2015-11-05 21:10:55 +03:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2017-02-24 21:28:29 +03:00
|
|
|
remote_pagesize_summary = qemu_get_be64(mis->from_src_file);
|
|
|
|
local_pagesize_summary = ram_pagesize_summary();
|
|
|
|
|
|
|
|
if (remote_pagesize_summary != local_pagesize_summary) {
|
2015-11-05 21:10:52 +03:00
|
|
|
/*
|
2017-02-24 21:28:29 +03:00
|
|
|
* This detects two potential causes of mismatch:
|
|
|
|
* a) A mismatch in host page sizes
|
|
|
|
* Some combinations of mismatch are probably possible but it gets
|
|
|
|
* a bit more complicated. In particular we need to place whole
|
|
|
|
* host pages on the dest at once, and we need to ensure that we
|
|
|
|
* handle dirtying to make sure we never end up sending part of
|
|
|
|
* a hostpage on it's own.
|
|
|
|
* b) The use of different huge page sizes on source/destination
|
|
|
|
* a more fine grain test is performed during RAM block migration
|
|
|
|
* but this test here causes a nice early clear failure, and
|
|
|
|
* also fails when passed to an older qemu that doesn't
|
|
|
|
* do huge pages.
|
2015-11-05 21:10:52 +03:00
|
|
|
*/
|
2017-02-24 21:28:29 +03:00
|
|
|
error_report("Postcopy needs matching RAM page sizes (s=%" PRIx64
|
|
|
|
" d=%" PRIx64 ")",
|
|
|
|
remote_pagesize_summary, local_pagesize_summary);
|
2015-11-05 21:10:52 +03:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
remote_tps = qemu_get_be64(mis->from_src_file);
|
|
|
|
if (remote_tps != (1ul << qemu_target_page_bits())) {
|
|
|
|
/*
|
|
|
|
* Again, some differences could be dealt with, but for now keep it
|
|
|
|
* simple.
|
|
|
|
*/
|
|
|
|
error_report("Postcopy needs matching target page sizes (s=%d d=%d)",
|
|
|
|
(int)remote_tps, 1 << qemu_target_page_bits());
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2015-11-05 21:11:03 +03:00
|
|
|
if (ram_postcopy_incoming_init(mis)) {
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
postcopy_state_set(POSTCOPY_INCOMING_ADVISE);
|
|
|
|
|
2015-11-05 21:10:52 +03:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* After postcopy we will be told to throw some pages away since they're
|
|
|
|
* dirty and will have to be demand fetched. Must happen before CPU is
|
|
|
|
* started.
|
|
|
|
* There can be 0..many of these messages, each encoding multiple pages.
|
|
|
|
*/
|
|
|
|
static int loadvm_postcopy_ram_handle_discard(MigrationIncomingState *mis,
|
|
|
|
uint16_t len)
|
|
|
|
{
|
|
|
|
int tmp;
|
|
|
|
char ramid[256];
|
|
|
|
PostcopyState ps = postcopy_state_get();
|
|
|
|
|
|
|
|
trace_loadvm_postcopy_ram_handle_discard();
|
|
|
|
|
|
|
|
switch (ps) {
|
|
|
|
case POSTCOPY_INCOMING_ADVISE:
|
|
|
|
/* 1st discard */
|
2015-11-05 21:11:20 +03:00
|
|
|
tmp = postcopy_ram_prepare_discard(mis);
|
2015-11-05 21:10:52 +03:00
|
|
|
if (tmp) {
|
|
|
|
return tmp;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case POSTCOPY_INCOMING_DISCARD:
|
|
|
|
/* Expected state */
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
error_report("CMD_POSTCOPY_RAM_DISCARD in wrong postcopy state (%d)",
|
|
|
|
ps);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
/* We're expecting a
|
|
|
|
* Version (0)
|
|
|
|
* a RAM ID string (length byte, name, 0 term)
|
|
|
|
* then at least 1 16 byte chunk
|
|
|
|
*/
|
|
|
|
if (len < (1 + 1 + 1 + 1 + 2 * 8)) {
|
|
|
|
error_report("CMD_POSTCOPY_RAM_DISCARD invalid length (%d)", len);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
tmp = qemu_get_byte(mis->from_src_file);
|
|
|
|
if (tmp != postcopy_ram_discard_version) {
|
|
|
|
error_report("CMD_POSTCOPY_RAM_DISCARD invalid version (%d)", tmp);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!qemu_get_counted_string(mis->from_src_file, ramid)) {
|
|
|
|
error_report("CMD_POSTCOPY_RAM_DISCARD Failed to read RAMBlock ID");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
tmp = qemu_get_byte(mis->from_src_file);
|
|
|
|
if (tmp != 0) {
|
|
|
|
error_report("CMD_POSTCOPY_RAM_DISCARD missing nil (%d)", tmp);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
len -= 3 + strlen(ramid);
|
|
|
|
if (len % 16) {
|
|
|
|
error_report("CMD_POSTCOPY_RAM_DISCARD invalid length (%d)", len);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
trace_loadvm_postcopy_ram_handle_discard_header(ramid, len);
|
|
|
|
while (len) {
|
|
|
|
uint64_t start_addr, block_length;
|
|
|
|
start_addr = qemu_get_be64(mis->from_src_file);
|
|
|
|
block_length = qemu_get_be64(mis->from_src_file);
|
|
|
|
|
|
|
|
len -= 16;
|
|
|
|
int ret = ram_discard_range(mis, ramid, start_addr,
|
|
|
|
block_length);
|
|
|
|
if (ret) {
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
trace_loadvm_postcopy_ram_handle_discard_end();
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-11-05 21:11:18 +03:00
|
|
|
/*
|
|
|
|
* Triggered by a postcopy_listen command; this thread takes over reading
|
|
|
|
* the input stream, leaving the main thread free to carry on loading the rest
|
|
|
|
* of the device state (from RAM).
|
|
|
|
* (TODO:This could do with being in a postcopy file - but there again it's
|
|
|
|
* just another input loop, not that postcopy specific)
|
|
|
|
*/
|
|
|
|
static void *postcopy_ram_listen_thread(void *opaque)
|
|
|
|
{
|
|
|
|
QEMUFile *f = opaque;
|
|
|
|
MigrationIncomingState *mis = migration_incoming_get_current();
|
|
|
|
int load_res;
|
|
|
|
|
2015-12-16 14:47:35 +03:00
|
|
|
migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE,
|
|
|
|
MIGRATION_STATUS_POSTCOPY_ACTIVE);
|
2015-11-05 21:11:18 +03:00
|
|
|
qemu_sem_post(&mis->listen_thread_sem);
|
|
|
|
trace_postcopy_ram_listen_thread_start();
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Because we're a thread and not a coroutine we can't yield
|
|
|
|
* in qemu_file, and thus we must be blocking now.
|
|
|
|
*/
|
|
|
|
qemu_file_set_blocking(f, true);
|
|
|
|
load_res = qemu_loadvm_state_main(f, mis);
|
|
|
|
/* And non-blocking again so we don't block in any cleanup */
|
|
|
|
qemu_file_set_blocking(f, false);
|
|
|
|
|
|
|
|
trace_postcopy_ram_listen_thread_exit();
|
|
|
|
if (load_res < 0) {
|
|
|
|
error_report("%s: loadvm failed: %d", __func__, load_res);
|
|
|
|
qemu_file_set_error(f, load_res);
|
2015-12-16 14:47:35 +03:00
|
|
|
migrate_set_state(&mis->state, MIGRATION_STATUS_POSTCOPY_ACTIVE,
|
|
|
|
MIGRATION_STATUS_FAILED);
|
2015-11-05 21:11:18 +03:00
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* This looks good, but it's possible that the device loading in the
|
|
|
|
* main thread hasn't finished yet, and so we might not be in 'RUN'
|
|
|
|
* state yet; wait for the end of the main thread.
|
|
|
|
*/
|
|
|
|
qemu_event_wait(&mis->main_thread_load_event);
|
|
|
|
}
|
|
|
|
postcopy_ram_incoming_cleanup(mis);
|
|
|
|
|
|
|
|
if (load_res < 0) {
|
|
|
|
/*
|
|
|
|
* If something went wrong then we have a bad state so exit;
|
|
|
|
* depending how far we got it might be possible at this point
|
|
|
|
* to leave the guest running and fire MCEs for pages that never
|
|
|
|
* arrived as a desperate recovery step.
|
|
|
|
*/
|
|
|
|
exit(EXIT_FAILURE);
|
|
|
|
}
|
|
|
|
|
2015-12-16 14:47:35 +03:00
|
|
|
migrate_set_state(&mis->state, MIGRATION_STATUS_POSTCOPY_ACTIVE,
|
|
|
|
MIGRATION_STATUS_COMPLETED);
|
|
|
|
/*
|
|
|
|
* If everything has worked fine, then the main thread has waited
|
|
|
|
* for us to start, and we're the last use of the mis.
|
|
|
|
* (If something broke then qemu will have to exit anyway since it's
|
|
|
|
* got a bad migration state).
|
|
|
|
*/
|
|
|
|
migration_incoming_state_destroy();
|
|
|
|
|
|
|
|
|
2015-11-05 21:11:18 +03:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2015-11-05 21:10:52 +03:00
|
|
|
/* After this message we must be able to immediately receive postcopy data */
|
|
|
|
static int loadvm_postcopy_handle_listen(MigrationIncomingState *mis)
|
|
|
|
{
|
|
|
|
PostcopyState ps = postcopy_state_set(POSTCOPY_INCOMING_LISTENING);
|
|
|
|
trace_loadvm_postcopy_handle_listen();
|
|
|
|
if (ps != POSTCOPY_INCOMING_ADVISE && ps != POSTCOPY_INCOMING_DISCARD) {
|
|
|
|
error_report("CMD_POSTCOPY_LISTEN in wrong postcopy state (%d)", ps);
|
|
|
|
return -1;
|
|
|
|
}
|
2015-11-05 21:11:20 +03:00
|
|
|
if (ps == POSTCOPY_INCOMING_ADVISE) {
|
|
|
|
/*
|
|
|
|
* A rare case, we entered listen without having to do any discards,
|
|
|
|
* so do the setup that's normally done at the time of the 1st discard.
|
|
|
|
*/
|
|
|
|
postcopy_ram_prepare_discard(mis);
|
|
|
|
}
|
2015-11-05 21:10:52 +03:00
|
|
|
|
2015-11-05 21:11:04 +03:00
|
|
|
/*
|
|
|
|
* Sensitise RAM - can now generate requests for blocks that don't exist
|
|
|
|
* However, at this point the CPU shouldn't be running, and the IO
|
|
|
|
* shouldn't be doing anything yet so don't actually expect requests
|
|
|
|
*/
|
|
|
|
if (postcopy_ram_enable_notify(mis)) {
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2015-11-05 21:11:18 +03:00
|
|
|
if (mis->have_listen_thread) {
|
|
|
|
error_report("CMD_POSTCOPY_RAM_LISTEN already has a listen thread");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
mis->have_listen_thread = true;
|
|
|
|
/* Start up the listening thread and wait for it to signal ready */
|
|
|
|
qemu_sem_init(&mis->listen_thread_sem, 0);
|
|
|
|
qemu_thread_create(&mis->listen_thread, "postcopy/listen",
|
|
|
|
postcopy_ram_listen_thread, mis->from_src_file,
|
2016-03-11 12:53:35 +03:00
|
|
|
QEMU_THREAD_DETACHED);
|
2015-11-05 21:11:18 +03:00
|
|
|
qemu_sem_wait(&mis->listen_thread_sem);
|
|
|
|
qemu_sem_destroy(&mis->listen_thread_sem);
|
|
|
|
|
2015-11-05 21:10:52 +03:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2016-03-09 18:35:08 +03:00
|
|
|
|
|
|
|
typedef struct {
|
|
|
|
QEMUBH *bh;
|
|
|
|
} HandleRunBhData;
|
|
|
|
|
2016-02-24 11:53:39 +03:00
|
|
|
static void loadvm_postcopy_handle_run_bh(void *opaque)
|
2015-11-05 21:10:52 +03:00
|
|
|
{
|
2015-11-05 21:11:19 +03:00
|
|
|
Error *local_err = NULL;
|
2016-03-09 18:35:08 +03:00
|
|
|
HandleRunBhData *data = opaque;
|
2015-11-05 21:10:52 +03:00
|
|
|
|
2015-11-05 21:11:19 +03:00
|
|
|
/* TODO we should move all of this lot into postcopy_ram.c or a shared code
|
|
|
|
* in migration.c
|
|
|
|
*/
|
|
|
|
cpu_synchronize_all_post_init();
|
|
|
|
|
|
|
|
qemu_announce_self();
|
|
|
|
|
|
|
|
/* Make sure all file formats flush their mutable metadata */
|
|
|
|
bdrv_invalidate_cache_all(&local_err);
|
|
|
|
if (local_err) {
|
|
|
|
error_report_err(local_err);
|
|
|
|
}
|
|
|
|
|
|
|
|
trace_loadvm_postcopy_handle_run_cpu_sync();
|
|
|
|
cpu_synchronize_all_post_init();
|
|
|
|
|
|
|
|
trace_loadvm_postcopy_handle_run_vmstart();
|
|
|
|
|
2015-11-05 21:10:52 +03:00
|
|
|
if (autostart) {
|
|
|
|
/* Hold onto your hats, starting the CPU */
|
|
|
|
vm_start();
|
|
|
|
} else {
|
|
|
|
/* leave it paused and let management decide when to start the CPU */
|
|
|
|
runstate_set(RUN_STATE_PAUSED);
|
|
|
|
}
|
|
|
|
|
2016-03-09 18:35:08 +03:00
|
|
|
qemu_bh_delete(data->bh);
|
|
|
|
g_free(data);
|
2016-02-24 11:53:39 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
/* After all discards we can start running and asking for pages */
|
|
|
|
static int loadvm_postcopy_handle_run(MigrationIncomingState *mis)
|
|
|
|
{
|
|
|
|
PostcopyState ps = postcopy_state_set(POSTCOPY_INCOMING_RUNNING);
|
2016-03-09 18:35:08 +03:00
|
|
|
HandleRunBhData *data;
|
2016-02-24 11:53:39 +03:00
|
|
|
|
|
|
|
trace_loadvm_postcopy_handle_run();
|
|
|
|
if (ps != POSTCOPY_INCOMING_LISTENING) {
|
|
|
|
error_report("CMD_POSTCOPY_RUN in wrong postcopy state (%d)", ps);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2016-03-09 18:35:08 +03:00
|
|
|
data = g_new(HandleRunBhData, 1);
|
|
|
|
data->bh = qemu_bh_new(loadvm_postcopy_handle_run_bh, data);
|
|
|
|
qemu_bh_schedule(data->bh);
|
2016-02-24 11:53:39 +03:00
|
|
|
|
2015-11-05 21:11:19 +03:00
|
|
|
/* We need to finish reading the stream from the package
|
|
|
|
* and also stop reading anything more from the stream that loaded the
|
|
|
|
* package (since it's now being read by the listener thread).
|
|
|
|
* LOADVM_QUIT will quit all the layers of nested loadvm loops.
|
|
|
|
*/
|
|
|
|
return LOADVM_QUIT;
|
2015-11-05 21:10:52 +03:00
|
|
|
}
|
|
|
|
|
2015-11-05 21:10:45 +03:00
|
|
|
/**
|
2015-11-05 21:10:53 +03:00
|
|
|
* Immediately following this command is a blob of data containing an embedded
|
|
|
|
* chunk of migration stream; read it and load it.
|
|
|
|
*
|
|
|
|
* @mis: Incoming state
|
|
|
|
* @length: Length of packaged data to read
|
2015-11-05 21:10:45 +03:00
|
|
|
*
|
2015-11-05 21:10:53 +03:00
|
|
|
* Returns: Negative values on error
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static int loadvm_handle_cmd_packaged(MigrationIncomingState *mis)
|
|
|
|
{
|
|
|
|
int ret;
|
2016-04-27 13:05:01 +03:00
|
|
|
size_t length;
|
|
|
|
QIOChannelBuffer *bioc;
|
2015-11-05 21:10:53 +03:00
|
|
|
|
|
|
|
length = qemu_get_be32(mis->from_src_file);
|
|
|
|
trace_loadvm_handle_cmd_packaged(length);
|
|
|
|
|
|
|
|
if (length > MAX_VM_CMD_PACKAGED_SIZE) {
|
2016-04-27 13:05:01 +03:00
|
|
|
error_report("Unreasonably large packaged state: %zu", length);
|
2015-11-05 21:10:53 +03:00
|
|
|
return -1;
|
|
|
|
}
|
2016-04-27 13:05:01 +03:00
|
|
|
|
|
|
|
bioc = qio_channel_buffer_new(length);
|
2016-09-30 13:57:14 +03:00
|
|
|
qio_channel_set_name(QIO_CHANNEL(bioc), "migration-loadvm-buffer");
|
2016-04-27 13:05:01 +03:00
|
|
|
ret = qemu_get_buffer(mis->from_src_file,
|
|
|
|
bioc->data,
|
|
|
|
length);
|
2015-11-05 21:10:53 +03:00
|
|
|
if (ret != length) {
|
2016-04-27 13:05:01 +03:00
|
|
|
object_unref(OBJECT(bioc));
|
|
|
|
error_report("CMD_PACKAGED: Buffer receive fail ret=%d length=%zu",
|
2015-12-18 18:35:19 +03:00
|
|
|
ret, length);
|
2015-11-05 21:10:53 +03:00
|
|
|
return (ret < 0) ? ret : -EAGAIN;
|
|
|
|
}
|
2016-04-27 13:05:01 +03:00
|
|
|
bioc->usage += length;
|
2015-11-05 21:10:53 +03:00
|
|
|
trace_loadvm_handle_cmd_packaged_received(ret);
|
|
|
|
|
2016-04-27 13:05:01 +03:00
|
|
|
QEMUFile *packf = qemu_fopen_channel_input(QIO_CHANNEL(bioc));
|
2015-11-05 21:10:53 +03:00
|
|
|
|
|
|
|
ret = qemu_loadvm_state_main(packf, mis);
|
|
|
|
trace_loadvm_handle_cmd_packaged_main(ret);
|
|
|
|
qemu_fclose(packf);
|
2016-04-27 13:05:01 +03:00
|
|
|
object_unref(OBJECT(bioc));
|
2015-11-05 21:10:53 +03:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Process an incoming 'QEMU_VM_COMMAND'
|
|
|
|
* 0 just a normal return
|
|
|
|
* LOADVM_QUIT All good, but exit the loop
|
|
|
|
* <0 Error
|
2015-11-05 21:10:45 +03:00
|
|
|
*/
|
|
|
|
static int loadvm_process_command(QEMUFile *f)
|
|
|
|
{
|
2015-11-05 21:10:46 +03:00
|
|
|
MigrationIncomingState *mis = migration_incoming_get_current();
|
2015-11-05 21:10:45 +03:00
|
|
|
uint16_t cmd;
|
|
|
|
uint16_t len;
|
2015-11-05 21:10:46 +03:00
|
|
|
uint32_t tmp32;
|
2015-11-05 21:10:45 +03:00
|
|
|
|
|
|
|
cmd = qemu_get_be16(f);
|
|
|
|
len = qemu_get_be16(f);
|
|
|
|
|
|
|
|
trace_loadvm_process_command(cmd, len);
|
|
|
|
if (cmd >= MIG_CMD_MAX || cmd == MIG_CMD_INVALID) {
|
|
|
|
error_report("MIG_CMD 0x%x unknown (len 0x%x)", cmd, len);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (mig_cmd_args[cmd].len != -1 && mig_cmd_args[cmd].len != len) {
|
|
|
|
error_report("%s received with bad length - expecting %zu, got %d",
|
|
|
|
mig_cmd_args[cmd].name,
|
|
|
|
(size_t)mig_cmd_args[cmd].len, len);
|
|
|
|
return -ERANGE;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (cmd) {
|
2015-11-05 21:10:46 +03:00
|
|
|
case MIG_CMD_OPEN_RETURN_PATH:
|
|
|
|
if (mis->to_src_file) {
|
|
|
|
error_report("CMD_OPEN_RETURN_PATH called when RP already open");
|
|
|
|
/* Not really a problem, so don't give up */
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
mis->to_src_file = qemu_file_get_return_path(f);
|
|
|
|
if (!mis->to_src_file) {
|
|
|
|
error_report("CMD_OPEN_RETURN_PATH failed");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case MIG_CMD_PING:
|
|
|
|
tmp32 = qemu_get_be32(f);
|
|
|
|
trace_loadvm_process_command_ping(tmp32);
|
|
|
|
if (!mis->to_src_file) {
|
|
|
|
error_report("CMD_PING (0x%x) received with no return path",
|
|
|
|
tmp32);
|
|
|
|
return -1;
|
|
|
|
}
|
2015-11-05 21:10:47 +03:00
|
|
|
migrate_send_rp_pong(mis, tmp32);
|
2015-11-05 21:10:46 +03:00
|
|
|
break;
|
2015-11-05 21:10:52 +03:00
|
|
|
|
2015-11-05 21:10:53 +03:00
|
|
|
case MIG_CMD_PACKAGED:
|
|
|
|
return loadvm_handle_cmd_packaged(mis);
|
|
|
|
|
2015-11-05 21:10:52 +03:00
|
|
|
case MIG_CMD_POSTCOPY_ADVISE:
|
|
|
|
return loadvm_postcopy_handle_advise(mis);
|
|
|
|
|
|
|
|
case MIG_CMD_POSTCOPY_LISTEN:
|
|
|
|
return loadvm_postcopy_handle_listen(mis);
|
|
|
|
|
|
|
|
case MIG_CMD_POSTCOPY_RUN:
|
|
|
|
return loadvm_postcopy_handle_run(mis);
|
|
|
|
|
|
|
|
case MIG_CMD_POSTCOPY_RAM_DISCARD:
|
|
|
|
return loadvm_postcopy_ram_handle_discard(mis, len);
|
2015-11-05 21:10:45 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-05-21 15:24:16 +03:00
|
|
|
struct LoadStateEntry {
|
2009-09-12 11:36:22 +04:00
|
|
|
QLIST_ENTRY(LoadStateEntry) entry;
|
2008-11-12 00:33:36 +03:00
|
|
|
SaveStateEntry *se;
|
|
|
|
int section_id;
|
|
|
|
int version_id;
|
2015-05-21 15:24:16 +03:00
|
|
|
};
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2015-07-02 11:22:03 +03:00
|
|
|
/*
|
|
|
|
* Read a footer off the wire and check that it matches the expected section
|
|
|
|
*
|
|
|
|
* Returns: true if the footer was good
|
|
|
|
* false if there is a problem (and calls error_report to say why)
|
|
|
|
*/
|
|
|
|
static bool check_section_footer(QEMUFile *f, LoadStateEntry *le)
|
|
|
|
{
|
|
|
|
uint8_t read_mark;
|
|
|
|
uint32_t read_section_id;
|
|
|
|
|
|
|
|
if (skip_section_footers) {
|
|
|
|
/* No footer to check */
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
read_mark = qemu_get_byte(f);
|
|
|
|
|
|
|
|
if (read_mark != QEMU_VM_SECTION_FOOTER) {
|
|
|
|
error_report("Missing section footer for %s", le->se->idstr);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
read_section_id = qemu_get_be32(f);
|
|
|
|
if (read_section_id != le->section_id) {
|
|
|
|
error_report("Mismatched section id in footer for %s -"
|
|
|
|
" read 0x%x expected 0x%x",
|
|
|
|
le->se->idstr, read_section_id, le->section_id);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* All good */
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
2015-05-21 15:24:16 +03:00
|
|
|
void loadvm_free_handlers(MigrationIncomingState *mis)
|
2008-11-12 00:33:36 +03:00
|
|
|
{
|
2009-09-01 04:12:33 +04:00
|
|
|
LoadStateEntry *le, *new_le;
|
2015-05-21 15:24:16 +03:00
|
|
|
|
|
|
|
QLIST_FOREACH_SAFE(le, &mis->loadvm_handlers, entry, new_le) {
|
|
|
|
QLIST_REMOVE(le, entry);
|
|
|
|
g_free(le);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-01-15 06:37:43 +03:00
|
|
|
static int
|
|
|
|
qemu_loadvm_section_start_full(QEMUFile *f, MigrationIncomingState *mis)
|
|
|
|
{
|
|
|
|
uint32_t instance_id, version_id, section_id;
|
|
|
|
SaveStateEntry *se;
|
|
|
|
LoadStateEntry *le;
|
|
|
|
char idstr[256];
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
/* Read section start */
|
|
|
|
section_id = qemu_get_be32(f);
|
|
|
|
if (!qemu_get_counted_string(f, idstr)) {
|
|
|
|
error_report("Unable to read ID string for section %u",
|
|
|
|
section_id);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
instance_id = qemu_get_be32(f);
|
|
|
|
version_id = qemu_get_be32(f);
|
|
|
|
|
|
|
|
trace_qemu_loadvm_state_section_startfull(section_id, idstr,
|
|
|
|
instance_id, version_id);
|
|
|
|
/* Find savevm section */
|
|
|
|
se = find_se(idstr, instance_id);
|
|
|
|
if (se == NULL) {
|
|
|
|
error_report("Unknown savevm section or instance '%s' %d",
|
|
|
|
idstr, instance_id);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Validate version */
|
|
|
|
if (version_id > se->version_id) {
|
|
|
|
error_report("savevm: unsupported version %d for '%s' v%d",
|
|
|
|
version_id, idstr, se->version_id);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2016-06-03 12:58:34 +03:00
|
|
|
/* Validate if it is a device's state */
|
|
|
|
if (xen_enabled() && se->is_ram) {
|
|
|
|
error_report("loadvm: %s RAM loading not allowed on Xen", idstr);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2016-01-15 06:37:43 +03:00
|
|
|
/* Add entry */
|
|
|
|
le = g_malloc0(sizeof(*le));
|
|
|
|
|
|
|
|
le->se = se;
|
|
|
|
le->section_id = section_id;
|
|
|
|
le->version_id = version_id;
|
|
|
|
QLIST_INSERT_HEAD(&mis->loadvm_handlers, le, entry);
|
|
|
|
|
|
|
|
ret = vmstate_load(f, le->se, le->version_id);
|
|
|
|
if (ret < 0) {
|
|
|
|
error_report("error while loading state for instance 0x%x of"
|
|
|
|
" device '%s'", instance_id, idstr);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
if (!check_section_footer(f, le)) {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
qemu_loadvm_section_part_end(QEMUFile *f, MigrationIncomingState *mis)
|
|
|
|
{
|
|
|
|
uint32_t section_id;
|
|
|
|
LoadStateEntry *le;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
section_id = qemu_get_be32(f);
|
|
|
|
|
|
|
|
trace_qemu_loadvm_state_section_partend(section_id);
|
|
|
|
QLIST_FOREACH(le, &mis->loadvm_handlers, entry) {
|
|
|
|
if (le->section_id == section_id) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (le == NULL) {
|
|
|
|
error_report("Unknown savevm section %d", section_id);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = vmstate_load(f, le->se, le->version_id);
|
|
|
|
if (ret < 0) {
|
|
|
|
error_report("error while loading state section id %d(%s)",
|
|
|
|
section_id, le->se->idstr);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
if (!check_section_footer(f, le)) {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-11-05 21:10:50 +03:00
|
|
|
static int qemu_loadvm_state_main(QEMUFile *f, MigrationIncomingState *mis)
|
2015-05-21 15:24:16 +03:00
|
|
|
{
|
2008-11-12 00:33:36 +03:00
|
|
|
uint8_t section_type;
|
2016-09-23 22:14:03 +03:00
|
|
|
int ret = 0;
|
2015-05-13 19:17:43 +03:00
|
|
|
|
2008-11-12 00:33:36 +03:00
|
|
|
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
2016-09-23 22:14:03 +03:00
|
|
|
ret = 0;
|
2015-01-21 13:14:48 +03:00
|
|
|
trace_qemu_loadvm_state_section(section_type);
|
2008-11-12 00:33:36 +03:00
|
|
|
switch (section_type) {
|
|
|
|
case QEMU_VM_SECTION_START:
|
|
|
|
case QEMU_VM_SECTION_FULL:
|
2016-01-15 06:37:43 +03:00
|
|
|
ret = qemu_loadvm_section_start_full(f, mis);
|
2009-08-20 21:42:23 +04:00
|
|
|
if (ret < 0) {
|
2016-09-23 22:14:03 +03:00
|
|
|
goto out;
|
2009-08-20 21:42:23 +04:00
|
|
|
}
|
2008-11-12 00:33:36 +03:00
|
|
|
break;
|
|
|
|
case QEMU_VM_SECTION_PART:
|
|
|
|
case QEMU_VM_SECTION_END:
|
2016-01-15 06:37:43 +03:00
|
|
|
ret = qemu_loadvm_section_part_end(f, mis);
|
2009-08-20 21:42:23 +04:00
|
|
|
if (ret < 0) {
|
2016-09-23 22:14:03 +03:00
|
|
|
goto out;
|
2009-08-20 21:42:23 +04:00
|
|
|
}
|
2008-11-12 00:33:36 +03:00
|
|
|
break;
|
2015-11-05 21:10:45 +03:00
|
|
|
case QEMU_VM_COMMAND:
|
|
|
|
ret = loadvm_process_command(f);
|
2015-11-05 21:10:50 +03:00
|
|
|
trace_qemu_loadvm_state_section_command(ret);
|
|
|
|
if ((ret < 0) || (ret & LOADVM_QUIT)) {
|
2016-09-23 22:14:03 +03:00
|
|
|
goto out;
|
2015-11-05 21:10:45 +03:00
|
|
|
}
|
|
|
|
break;
|
2008-11-12 00:33:36 +03:00
|
|
|
default:
|
2015-01-21 13:14:47 +03:00
|
|
|
error_report("Unknown savevm section type %d", section_type);
|
2016-09-23 22:14:03 +03:00
|
|
|
ret = -EINVAL;
|
|
|
|
goto out;
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-09-23 22:14:03 +03:00
|
|
|
out:
|
|
|
|
if (ret < 0) {
|
|
|
|
qemu_file_set_error(f, ret);
|
|
|
|
}
|
|
|
|
return ret;
|
2015-11-05 21:10:50 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
int qemu_loadvm_state(QEMUFile *f)
|
|
|
|
{
|
|
|
|
MigrationIncomingState *mis = migration_incoming_get_current();
|
|
|
|
Error *local_err = NULL;
|
|
|
|
unsigned int v;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (qemu_savevm_state_blocked(&local_err)) {
|
|
|
|
error_report_err(local_err);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
v = qemu_get_be32(f);
|
|
|
|
if (v != QEMU_VM_FILE_MAGIC) {
|
|
|
|
error_report("Not a migration stream");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
v = qemu_get_be32(f);
|
|
|
|
if (v == QEMU_VM_FILE_VERSION_COMPAT) {
|
|
|
|
error_report("SaveVM v2 format is obsolete and don't work anymore");
|
|
|
|
return -ENOTSUP;
|
|
|
|
}
|
|
|
|
if (v != QEMU_VM_FILE_VERSION) {
|
|
|
|
error_report("Unsupported migration stream version");
|
|
|
|
return -ENOTSUP;
|
|
|
|
}
|
|
|
|
|
2016-02-18 14:32:25 +03:00
|
|
|
if (!savevm_state.skip_configuration || enforce_config_section()) {
|
2015-11-05 21:10:50 +03:00
|
|
|
if (qemu_get_byte(f) != QEMU_VM_CONFIGURATION) {
|
|
|
|
error_report("Configuration section missing");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
ret = vmstate_load_state(f, &vmstate_configuration, &savevm_state, 0);
|
|
|
|
|
|
|
|
if (ret) {
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = qemu_loadvm_state_main(f, mis);
|
|
|
|
qemu_event_set(&mis->main_thread_load_event);
|
|
|
|
|
|
|
|
trace_qemu_loadvm_state_post_main(ret);
|
|
|
|
|
2015-11-05 21:11:18 +03:00
|
|
|
if (mis->have_listen_thread) {
|
|
|
|
/* Listen thread still going, can't clean up yet */
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2015-11-05 21:10:50 +03:00
|
|
|
if (ret == 0) {
|
|
|
|
ret = qemu_file_get_error(f);
|
|
|
|
}
|
2015-02-23 15:56:41 +03:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Try to read in the VMDESC section as well, so that dumping tools that
|
|
|
|
* intercept our migration stream have the chance to see it.
|
|
|
|
*/
|
2015-06-23 19:34:35 +03:00
|
|
|
|
|
|
|
/* We've got to be careful; if we don't read the data and just shut the fd
|
|
|
|
* then the sender can error if we close while it's still sending.
|
|
|
|
* We also mustn't read data that isn't there; some transports (RDMA)
|
|
|
|
* will stall waiting for that data when the source has already closed.
|
|
|
|
*/
|
2015-11-05 21:10:50 +03:00
|
|
|
if (ret == 0 && should_send_vmdesc()) {
|
2015-06-23 19:34:35 +03:00
|
|
|
uint8_t *buf;
|
|
|
|
uint32_t size;
|
2015-11-05 21:10:50 +03:00
|
|
|
uint8_t section_type = qemu_get_byte(f);
|
2015-06-23 19:34:35 +03:00
|
|
|
|
|
|
|
if (section_type != QEMU_VM_VMDESCRIPTION) {
|
|
|
|
error_report("Expected vmdescription section, but got %d",
|
|
|
|
section_type);
|
|
|
|
/*
|
|
|
|
* It doesn't seem worth failing at this point since
|
|
|
|
* we apparently have an otherwise valid VM state
|
|
|
|
*/
|
|
|
|
} else {
|
|
|
|
buf = g_malloc(0x1000);
|
|
|
|
size = qemu_get_be32(f);
|
|
|
|
|
|
|
|
while (size > 0) {
|
|
|
|
uint32_t read_chunk = MIN(size, 0x1000);
|
|
|
|
qemu_get_buffer(f, buf, read_chunk);
|
|
|
|
size -= read_chunk;
|
|
|
|
}
|
|
|
|
g_free(buf);
|
2015-02-23 15:56:41 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-03-01 21:10:30 +03:00
|
|
|
cpu_synchronize_all_post_init();
|
|
|
|
|
2008-11-12 00:33:36 +03:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2017-01-24 10:17:41 +03:00
|
|
|
int save_vmstate(Monitor *mon, const char *name)
|
2008-11-12 00:33:36 +03:00
|
|
|
{
|
|
|
|
BlockDriverState *bs, *bs1;
|
|
|
|
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
|
2017-01-24 10:17:41 +03:00
|
|
|
int ret = -1;
|
2008-11-12 00:33:36 +03:00
|
|
|
QEMUFile *f;
|
|
|
|
int saved_vm_running;
|
2011-11-16 14:35:54 +04:00
|
|
|
uint64_t vm_state_size;
|
2013-01-08 01:20:27 +04:00
|
|
|
qemu_timeval tv;
|
2010-08-04 21:55:49 +04:00
|
|
|
struct tm tm;
|
2015-02-10 16:25:02 +03:00
|
|
|
Error *local_err = NULL;
|
2015-11-19 09:42:11 +03:00
|
|
|
AioContext *aio_context;
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2015-11-19 09:42:01 +03:00
|
|
|
if (!bdrv_all_can_snapshot(&bs)) {
|
|
|
|
monitor_printf(mon, "Device '%s' is writable but does not "
|
|
|
|
"support snapshots.\n", bdrv_get_device_name(bs));
|
2017-01-24 10:17:41 +03:00
|
|
|
return ret;
|
savevm: Really verify if a drive supports snapshots
Both bdrv_can_snapshot() and bdrv_has_snapshot() does not work as advertized.
First issue: Their names implies different porpouses, but they do the same thing
and have exactly the same code. Maybe copied and pasted and forgotten?
bdrv_has_snapshot() is called in various places for actually checking if there
is snapshots or not.
Second issue: the way bdrv_can_snapshot() verifies if a block driver supports or
not snapshots does not catch all cases. E.g.: a raw image.
So when do_savevm() is called, first thing it does is to set a global
BlockDriverState to save the VM memory state calling get_bs_snapshots().
static BlockDriverState *get_bs_snapshots(void)
{
BlockDriverState *bs;
DriveInfo *dinfo;
if (bs_snapshots)
return bs_snapshots;
QTAILQ_FOREACH(dinfo, &drives, next) {
bs = dinfo->bdrv;
if (bdrv_can_snapshot(bs))
goto ok;
}
return NULL;
ok:
bs_snapshots = bs;
return bs;
}
bdrv_can_snapshot() may return a BlockDriverState that does not support
snapshots and do_savevm() goes on.
Later on in do_savevm(), we find:
QTAILQ_FOREACH(dinfo, &drives, next) {
bs1 = dinfo->bdrv;
if (bdrv_has_snapshot(bs1)) {
/* Write VM state size only to the image that contains the state */
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
ret = bdrv_snapshot_create(bs1, sn);
if (ret < 0) {
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
bdrv_get_device_name(bs1));
}
}
}
bdrv_has_snapshot(bs1) is not checking if the device does support or has
snapshots as explained above. Only in bdrv_snapshot_create() the device is
actually checked for snapshot support.
So, in cases where the first device supports snapshots, and the second does not,
the snapshot on the first will happen anyways. I believe this is not a good
behavior. It should be an all or nothing process.
This patch addresses these issues by making bdrv_can_snapshot() actually do
what it must do and enforces better tests to avoid errors in the middle of
do_savevm(). bdrv_has_snapshot() is removed and replaced by bdrv_can_snapshot()
where appropriate.
bdrv_can_snapshot() was moved from savevm.c to block.c. It makes more sense to me.
The loadvm_state() function was updated too to enforce that when loading a VM at
least all writable devices must support snapshots too.
Signed-off-by: Miguel Di Ciurcio Filho <miguel.filho@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2010-06-08 17:40:55 +04:00
|
|
|
}
|
|
|
|
|
2015-11-19 09:42:09 +03:00
|
|
|
/* Delete old snapshots of the same name */
|
2017-01-24 10:17:41 +03:00
|
|
|
if (name) {
|
|
|
|
ret = bdrv_all_delete_snapshot(name, &bs1, &local_err);
|
|
|
|
if (ret < 0) {
|
|
|
|
error_reportf_err(local_err,
|
|
|
|
"Error while deleting snapshot on device '%s': ",
|
|
|
|
bdrv_get_device_name(bs1));
|
|
|
|
return ret;
|
|
|
|
}
|
2015-11-19 09:42:09 +03:00
|
|
|
}
|
|
|
|
|
2015-11-19 09:42:10 +03:00
|
|
|
bs = bdrv_all_find_vmstate_bs();
|
|
|
|
if (bs == NULL) {
|
2009-03-06 02:01:23 +03:00
|
|
|
monitor_printf(mon, "No block device can accept snapshots\n");
|
2017-01-24 10:17:41 +03:00
|
|
|
return ret;
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
2015-11-19 09:42:11 +03:00
|
|
|
aio_context = bdrv_get_aio_context(bs);
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2011-07-29 22:36:43 +04:00
|
|
|
saved_vm_running = runstate_is_running();
|
2015-07-15 10:53:46 +03:00
|
|
|
|
|
|
|
ret = global_state_store();
|
|
|
|
if (ret) {
|
|
|
|
monitor_printf(mon, "Error saving global state\n");
|
2017-01-24 10:17:41 +03:00
|
|
|
return ret;
|
2015-07-15 10:53:46 +03:00
|
|
|
}
|
2011-09-30 21:45:27 +04:00
|
|
|
vm_stop(RUN_STATE_SAVE_VM);
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2015-11-19 09:42:11 +03:00
|
|
|
aio_context_acquire(aio_context);
|
|
|
|
|
2009-11-03 19:34:37 +03:00
|
|
|
memset(sn, 0, sizeof(*sn));
|
2008-11-12 00:33:36 +03:00
|
|
|
|
|
|
|
/* fill auxiliary fields */
|
2013-01-08 01:20:27 +04:00
|
|
|
qemu_gettimeofday(&tv);
|
2008-11-12 00:33:36 +03:00
|
|
|
sn->date_sec = tv.tv_sec;
|
|
|
|
sn->date_nsec = tv.tv_usec * 1000;
|
2013-08-21 19:03:08 +04:00
|
|
|
sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2010-08-04 21:55:49 +04:00
|
|
|
if (name) {
|
|
|
|
ret = bdrv_snapshot_find(bs, old_sn, name);
|
|
|
|
if (ret >= 0) {
|
|
|
|
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
|
|
|
|
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
|
|
|
|
} else {
|
|
|
|
pstrcpy(sn->name, sizeof(sn->name), name);
|
|
|
|
}
|
|
|
|
} else {
|
2010-09-09 23:13:04 +04:00
|
|
|
/* cast below needed for OpenBSD where tv_sec is still 'long' */
|
|
|
|
localtime_r((const time_t *)&tv.tv_sec, &tm);
|
2010-08-04 21:55:49 +04:00
|
|
|
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm);
|
|
|
|
}
|
|
|
|
|
2008-11-12 00:33:36 +03:00
|
|
|
/* save the VM state */
|
2009-07-11 01:11:57 +04:00
|
|
|
f = qemu_fopen_bdrv(bs, 1);
|
2008-11-12 00:33:36 +03:00
|
|
|
if (!f) {
|
2009-03-06 02:01:23 +03:00
|
|
|
monitor_printf(mon, "Could not open VM state file\n");
|
2008-11-12 00:33:36 +03:00
|
|
|
goto the_end;
|
|
|
|
}
|
2015-02-10 16:25:02 +03:00
|
|
|
ret = qemu_savevm_state(f, &local_err);
|
2008-12-12 00:06:49 +03:00
|
|
|
vm_state_size = qemu_ftell(f);
|
2008-11-12 00:33:36 +03:00
|
|
|
qemu_fclose(f);
|
|
|
|
if (ret < 0) {
|
error: Use error_report_err() instead of monitor_printf()
Both error_report_err() and monitor_printf() print to the same
destination when monitor_printf() is used correctly, i.e. within an
HMP monitor. Elsewhere, monitor_printf() does nothing, while
error_report_err() reports to stderr.
Most changed functions are HMP command handlers. These should only
run within an HMP monitor. The one exception is bdrv_password_cb(),
which should also only run within an HMP monitor.
Four command handlers prefix the error message with the command name:
balloon, migrate_set_capability, migrate_set_parameter, migrate.
Pointless, drop.
Unlike monitor_printf(), error_report_err() uses the error whole
instead of just its message obtained with error_get_pretty(). This
avoids suppressing its hint (see commit 50b7b00). Example:
(qemu) device_add ivshmem,id=666
Parameter 'id' expects an identifier
Identifiers consist of letters, digits, '-', '.', '_', starting with a letter.
Try "help device_add" for more information
The "Identifiers consist of..." line is new with this patch.
Coccinelle semantic patch:
@@
expression M, E;
@@
- monitor_printf(M, "%s\n", error_get_pretty(E));
- error_free(E);
+ error_report_err(E);
@r1@
expression M, E;
format F;
position p;
@@
- monitor_printf(M, "...%@F@\n", error_get_pretty(E));@p
- error_free(E);
+ error_report_err(E);
@script:python@
p << r1.p;
@@
print "%s:%s:%s: prefix dropped" % (p[0].file, p[0].line, p[0].column)
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1450452927-8346-4-git-send-email-armbru@redhat.com>
2015-12-18 18:35:06 +03:00
|
|
|
error_report_err(local_err);
|
2008-11-12 00:33:36 +03:00
|
|
|
goto the_end;
|
|
|
|
}
|
|
|
|
|
2015-11-19 09:42:08 +03:00
|
|
|
ret = bdrv_all_create_snapshot(sn, bs, vm_state_size, &bs);
|
|
|
|
if (ret < 0) {
|
|
|
|
monitor_printf(mon, "Error while creating snapshot on '%s'\n",
|
|
|
|
bdrv_get_device_name(bs));
|
2017-01-24 10:17:41 +03:00
|
|
|
goto the_end;
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
|
2017-01-24 10:17:41 +03:00
|
|
|
ret = 0;
|
|
|
|
|
2008-11-12 00:33:36 +03:00
|
|
|
the_end:
|
2015-11-19 09:42:11 +03:00
|
|
|
aio_context_release(aio_context);
|
2013-11-28 18:01:13 +04:00
|
|
|
if (saved_vm_running) {
|
2008-11-12 00:33:36 +03:00
|
|
|
vm_start();
|
2013-11-28 18:01:13 +04:00
|
|
|
}
|
2017-01-24 10:17:41 +03:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
void hmp_savevm(Monitor *mon, const QDict *qdict)
|
|
|
|
{
|
|
|
|
save_vmstate(mon, qdict_get_try_str(qdict, "name"));
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
|
2012-01-25 16:24:51 +04:00
|
|
|
void qmp_xen_save_devices_state(const char *filename, Error **errp)
|
|
|
|
{
|
|
|
|
QEMUFile *f;
|
2016-04-27 13:05:08 +03:00
|
|
|
QIOChannelFile *ioc;
|
2012-01-25 16:24:51 +04:00
|
|
|
int saved_vm_running;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
saved_vm_running = runstate_is_running();
|
|
|
|
vm_stop(RUN_STATE_SAVE_VM);
|
2015-08-03 17:29:19 +03:00
|
|
|
global_state_store_running();
|
2012-01-25 16:24:51 +04:00
|
|
|
|
2016-04-27 13:05:08 +03:00
|
|
|
ioc = qio_channel_file_new_path(filename, O_WRONLY | O_CREAT, 0660, errp);
|
|
|
|
if (!ioc) {
|
2012-01-25 16:24:51 +04:00
|
|
|
goto the_end;
|
|
|
|
}
|
2016-09-30 13:57:14 +03:00
|
|
|
qio_channel_set_name(QIO_CHANNEL(ioc), "migration-xen-save-state");
|
2016-04-27 13:05:08 +03:00
|
|
|
f = qemu_fopen_channel_output(QIO_CHANNEL(ioc));
|
2012-01-25 16:24:51 +04:00
|
|
|
ret = qemu_save_device_state(f);
|
|
|
|
qemu_fclose(f);
|
|
|
|
if (ret < 0) {
|
2015-03-17 13:54:50 +03:00
|
|
|
error_setg(errp, QERR_IO_ERROR);
|
2012-01-25 16:24:51 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
the_end:
|
2013-11-28 18:01:13 +04:00
|
|
|
if (saved_vm_running) {
|
2012-01-25 16:24:51 +04:00
|
|
|
vm_start();
|
2013-11-28 18:01:13 +04:00
|
|
|
}
|
2012-01-25 16:24:51 +04:00
|
|
|
}
|
|
|
|
|
2016-06-03 12:58:34 +03:00
|
|
|
void qmp_xen_load_devices_state(const char *filename, Error **errp)
|
|
|
|
{
|
|
|
|
QEMUFile *f;
|
|
|
|
QIOChannelFile *ioc;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
/* Guest must be paused before loading the device state; the RAM state
|
|
|
|
* will already have been loaded by xc
|
|
|
|
*/
|
|
|
|
if (runstate_is_running()) {
|
|
|
|
error_setg(errp, "Cannot update device state while vm is running");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
vm_stop(RUN_STATE_RESTORE_VM);
|
|
|
|
|
|
|
|
ioc = qio_channel_file_new_path(filename, O_RDONLY | O_BINARY, 0, errp);
|
|
|
|
if (!ioc) {
|
|
|
|
return;
|
|
|
|
}
|
2016-09-30 13:57:14 +03:00
|
|
|
qio_channel_set_name(QIO_CHANNEL(ioc), "migration-xen-load-state");
|
2016-06-03 12:58:34 +03:00
|
|
|
f = qemu_fopen_channel_input(QIO_CHANNEL(ioc));
|
|
|
|
|
|
|
|
ret = qemu_loadvm_state(f);
|
|
|
|
qemu_fclose(f);
|
|
|
|
if (ret < 0) {
|
|
|
|
error_setg(errp, QERR_IO_ERROR);
|
|
|
|
}
|
|
|
|
migration_incoming_state_destroy();
|
|
|
|
}
|
|
|
|
|
2010-02-17 18:24:10 +03:00
|
|
|
int load_vmstate(const char *name)
|
2008-11-12 00:33:36 +03:00
|
|
|
{
|
2010-07-19 22:25:01 +04:00
|
|
|
BlockDriverState *bs, *bs_vm_state;
|
2008-12-12 00:06:49 +03:00
|
|
|
QEMUSnapshotInfo sn;
|
2008-11-12 00:33:36 +03:00
|
|
|
QEMUFile *f;
|
2009-07-22 18:42:57 +04:00
|
|
|
int ret;
|
2015-11-19 09:42:11 +03:00
|
|
|
AioContext *aio_context;
|
2017-01-24 00:32:06 +03:00
|
|
|
MigrationIncomingState *mis = migration_incoming_get_current();
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2015-11-19 09:42:05 +03:00
|
|
|
if (!bdrv_all_can_snapshot(&bs)) {
|
|
|
|
error_report("Device '%s' is writable but does not support snapshots.",
|
|
|
|
bdrv_get_device_name(bs));
|
|
|
|
return -ENOTSUP;
|
|
|
|
}
|
2015-11-19 09:42:06 +03:00
|
|
|
ret = bdrv_all_find_snapshot(name, &bs);
|
|
|
|
if (ret < 0) {
|
|
|
|
error_report("Device '%s' does not have the requested snapshot '%s'",
|
|
|
|
bdrv_get_device_name(bs), name);
|
|
|
|
return ret;
|
|
|
|
}
|
2015-11-19 09:42:05 +03:00
|
|
|
|
2015-11-19 09:42:10 +03:00
|
|
|
bs_vm_state = bdrv_all_find_vmstate_bs();
|
2010-07-19 22:25:01 +04:00
|
|
|
if (!bs_vm_state) {
|
|
|
|
error_report("No block device supports snapshots");
|
|
|
|
return -ENOTSUP;
|
|
|
|
}
|
2015-11-19 09:42:11 +03:00
|
|
|
aio_context = bdrv_get_aio_context(bs_vm_state);
|
2010-07-19 22:25:01 +04:00
|
|
|
|
|
|
|
/* Don't even try to load empty VM states */
|
2015-11-19 09:42:11 +03:00
|
|
|
aio_context_acquire(aio_context);
|
2010-07-19 22:25:01 +04:00
|
|
|
ret = bdrv_snapshot_find(bs_vm_state, &sn, name);
|
2015-11-19 09:42:11 +03:00
|
|
|
aio_context_release(aio_context);
|
2010-07-19 22:25:01 +04:00
|
|
|
if (ret < 0) {
|
|
|
|
return ret;
|
|
|
|
} else if (sn.vm_state_size == 0) {
|
2011-03-01 12:48:12 +03:00
|
|
|
error_report("This is a disk-only snapshot. Revert to it offline "
|
|
|
|
"using qemu-img.");
|
2010-07-19 22:25:01 +04:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2008-11-12 00:33:36 +03:00
|
|
|
/* Flush all IO requests so they don't interfere with the new state. */
|
2011-11-30 16:23:43 +04:00
|
|
|
bdrv_drain_all();
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2015-11-19 09:42:04 +03:00
|
|
|
ret = bdrv_all_goto_snapshot(name, &bs);
|
|
|
|
if (ret < 0) {
|
|
|
|
error_report("Error %d while activating snapshot '%s' on '%s'",
|
|
|
|
ret, name, bdrv_get_device_name(bs));
|
|
|
|
return ret;
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
/* restore the VM state */
|
2010-07-19 22:25:01 +04:00
|
|
|
f = qemu_fopen_bdrv(bs_vm_state, 0);
|
2008-11-12 00:33:36 +03:00
|
|
|
if (!f) {
|
2010-02-18 19:25:24 +03:00
|
|
|
error_report("Could not open VM state file");
|
2009-08-20 21:42:22 +04:00
|
|
|
return -EINVAL;
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
2010-07-19 22:25:01 +04:00
|
|
|
|
2011-06-14 20:29:45 +04:00
|
|
|
qemu_system_reset(VMRESET_SILENT);
|
2017-01-24 00:32:06 +03:00
|
|
|
mis->from_src_file = f;
|
2010-07-19 22:25:01 +04:00
|
|
|
|
2015-11-19 09:42:11 +03:00
|
|
|
aio_context_acquire(aio_context);
|
|
|
|
ret = qemu_loadvm_state(f);
|
2008-11-12 00:33:36 +03:00
|
|
|
qemu_fclose(f);
|
2015-11-19 09:42:11 +03:00
|
|
|
aio_context_release(aio_context);
|
|
|
|
|
2015-05-21 15:24:14 +03:00
|
|
|
migration_incoming_state_destroy();
|
2008-11-12 00:33:36 +03:00
|
|
|
if (ret < 0) {
|
2010-02-18 19:25:24 +03:00
|
|
|
error_report("Error %d while loading VM state", ret);
|
2009-08-20 21:42:22 +04:00
|
|
|
return ret;
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
2010-07-19 22:25:01 +04:00
|
|
|
|
2009-08-20 21:42:22 +04:00
|
|
|
return 0;
|
2009-08-20 21:42:20 +04:00
|
|
|
}
|
|
|
|
|
hmp: Name HMP command handler functions hmp_COMMAND()
Some are called do_COMMAND() (old ones, usually), some hmp_COMMAND(),
and sometimes COMMAND pointlessly differs in spelling.
Normalize to hmp_COMMAND(), where COMMAND is exactly the command name
with '-' replaced by '_'.
Exceptions:
* do_device_add() and client_migrate_info() *not* renamed to
hmp_device_add(), hmp_client_migrate_info(), because they're also
QMP handlers. They still need to be converted to QAPI.
* do_memory_dump(), do_physical_memory_dump(), do_ioport_read(),
do_ioport_write() renamed do hmp_* instead of hmp_x(), hmp_xp(),
hmp_i(), hmp_o(), because those names are too cryptic for my taste.
* do_info_help() renamed to hmp_info_help() instead of hmp_info(),
because it only covers help.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-02-06 15:55:43 +03:00
|
|
|
void hmp_delvm(Monitor *mon, const QDict *qdict)
|
2008-11-12 00:33:36 +03:00
|
|
|
{
|
2014-09-29 12:38:02 +04:00
|
|
|
BlockDriverState *bs;
|
2014-10-06 20:33:45 +04:00
|
|
|
Error *err;
|
2009-08-28 22:27:13 +04:00
|
|
|
const char *name = qdict_get_str(qdict, "name");
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2015-11-19 09:42:03 +03:00
|
|
|
if (bdrv_all_delete_snapshot(name, &bs, &err) < 0) {
|
2015-12-18 18:35:17 +03:00
|
|
|
error_reportf_err(err,
|
|
|
|
"Error while deleting snapshot on device '%s': ",
|
|
|
|
bdrv_get_device_name(bs));
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-02-06 16:18:24 +03:00
|
|
|
void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
|
2008-11-12 00:33:36 +03:00
|
|
|
{
|
|
|
|
BlockDriverState *bs, *bs1;
|
2016-07-07 08:26:04 +03:00
|
|
|
BdrvNextIterator it1;
|
2015-11-19 09:42:06 +03:00
|
|
|
QEMUSnapshotInfo *sn_tab, *sn;
|
2016-07-07 08:26:04 +03:00
|
|
|
bool no_snapshot = true;
|
2015-11-19 09:42:06 +03:00
|
|
|
int nb_sns, i;
|
2010-08-04 21:55:48 +04:00
|
|
|
int total;
|
2016-07-07 08:26:04 +03:00
|
|
|
int *global_snapshots;
|
2015-11-19 09:42:11 +03:00
|
|
|
AioContext *aio_context;
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2016-07-07 08:26:04 +03:00
|
|
|
typedef struct SnapshotEntry {
|
|
|
|
QEMUSnapshotInfo sn;
|
|
|
|
QTAILQ_ENTRY(SnapshotEntry) next;
|
|
|
|
} SnapshotEntry;
|
|
|
|
|
|
|
|
typedef struct ImageEntry {
|
|
|
|
const char *imagename;
|
|
|
|
QTAILQ_ENTRY(ImageEntry) next;
|
|
|
|
QTAILQ_HEAD(, SnapshotEntry) snapshots;
|
|
|
|
} ImageEntry;
|
|
|
|
|
|
|
|
QTAILQ_HEAD(, ImageEntry) image_list =
|
|
|
|
QTAILQ_HEAD_INITIALIZER(image_list);
|
|
|
|
|
|
|
|
ImageEntry *image_entry, *next_ie;
|
|
|
|
SnapshotEntry *snapshot_entry;
|
|
|
|
|
2015-11-19 09:42:10 +03:00
|
|
|
bs = bdrv_all_find_vmstate_bs();
|
2008-11-12 00:33:36 +03:00
|
|
|
if (!bs) {
|
2009-03-06 02:01:23 +03:00
|
|
|
monitor_printf(mon, "No available block device supports snapshots\n");
|
2008-11-12 00:33:36 +03:00
|
|
|
return;
|
|
|
|
}
|
2015-11-19 09:42:11 +03:00
|
|
|
aio_context = bdrv_get_aio_context(bs);
|
2008-11-12 00:33:36 +03:00
|
|
|
|
2015-11-19 09:42:11 +03:00
|
|
|
aio_context_acquire(aio_context);
|
2008-11-12 00:33:36 +03:00
|
|
|
nb_sns = bdrv_snapshot_list(bs, &sn_tab);
|
2015-11-19 09:42:11 +03:00
|
|
|
aio_context_release(aio_context);
|
|
|
|
|
2008-11-12 00:33:36 +03:00
|
|
|
if (nb_sns < 0) {
|
2009-03-06 02:01:23 +03:00
|
|
|
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
2008-11-12 00:33:36 +03:00
|
|
|
return;
|
|
|
|
}
|
2010-08-04 21:55:48 +04:00
|
|
|
|
2016-07-07 08:26:04 +03:00
|
|
|
for (bs1 = bdrv_first(&it1); bs1; bs1 = bdrv_next(&it1)) {
|
|
|
|
int bs1_nb_sns = 0;
|
|
|
|
ImageEntry *ie;
|
|
|
|
SnapshotEntry *se;
|
|
|
|
AioContext *ctx = bdrv_get_aio_context(bs1);
|
|
|
|
|
|
|
|
aio_context_acquire(ctx);
|
|
|
|
if (bdrv_can_snapshot(bs1)) {
|
|
|
|
sn = NULL;
|
|
|
|
bs1_nb_sns = bdrv_snapshot_list(bs1, &sn);
|
|
|
|
if (bs1_nb_sns > 0) {
|
|
|
|
no_snapshot = false;
|
|
|
|
ie = g_new0(ImageEntry, 1);
|
|
|
|
ie->imagename = bdrv_get_device_name(bs1);
|
|
|
|
QTAILQ_INIT(&ie->snapshots);
|
|
|
|
QTAILQ_INSERT_TAIL(&image_list, ie, next);
|
|
|
|
for (i = 0; i < bs1_nb_sns; i++) {
|
|
|
|
se = g_new0(SnapshotEntry, 1);
|
|
|
|
se->sn = sn[i];
|
|
|
|
QTAILQ_INSERT_TAIL(&ie->snapshots, se, next);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
g_free(sn);
|
|
|
|
}
|
|
|
|
aio_context_release(ctx);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (no_snapshot) {
|
2010-08-04 21:55:48 +04:00
|
|
|
monitor_printf(mon, "There is no snapshot available.\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2016-07-07 08:26:04 +03:00
|
|
|
global_snapshots = g_new0(int, nb_sns);
|
2010-08-04 21:55:48 +04:00
|
|
|
total = 0;
|
|
|
|
for (i = 0; i < nb_sns; i++) {
|
2016-07-07 08:26:04 +03:00
|
|
|
SnapshotEntry *next_sn;
|
2016-07-07 08:26:03 +03:00
|
|
|
if (bdrv_all_find_snapshot(sn_tab[i].name, &bs1) == 0) {
|
2016-07-07 08:26:04 +03:00
|
|
|
global_snapshots[total] = i;
|
2010-08-04 21:55:48 +04:00
|
|
|
total++;
|
2016-07-07 08:26:04 +03:00
|
|
|
QTAILQ_FOREACH(image_entry, &image_list, next) {
|
|
|
|
QTAILQ_FOREACH_SAFE(snapshot_entry, &image_entry->snapshots,
|
|
|
|
next, next_sn) {
|
|
|
|
if (!strcmp(sn_tab[i].name, snapshot_entry->sn.name)) {
|
|
|
|
QTAILQ_REMOVE(&image_entry->snapshots, snapshot_entry,
|
|
|
|
next);
|
|
|
|
g_free(snapshot_entry);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2010-08-04 21:55:48 +04:00
|
|
|
}
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
2010-08-04 21:55:48 +04:00
|
|
|
|
2016-07-07 08:26:04 +03:00
|
|
|
monitor_printf(mon, "List of snapshots present on all disks:\n");
|
|
|
|
|
2010-08-04 21:55:48 +04:00
|
|
|
if (total > 0) {
|
2013-05-25 07:09:45 +04:00
|
|
|
bdrv_snapshot_dump((fprintf_function)monitor_printf, mon, NULL);
|
|
|
|
monitor_printf(mon, "\n");
|
2010-08-04 21:55:48 +04:00
|
|
|
for (i = 0; i < total; i++) {
|
2016-07-07 08:26:04 +03:00
|
|
|
sn = &sn_tab[global_snapshots[i]];
|
2016-07-07 08:26:03 +03:00
|
|
|
/* The ID is not guaranteed to be the same on all images, so
|
|
|
|
* overwrite it.
|
|
|
|
*/
|
|
|
|
pstrcpy(sn->id_str, sizeof(sn->id_str), "--");
|
2013-05-25 07:09:45 +04:00
|
|
|
bdrv_snapshot_dump((fprintf_function)monitor_printf, mon, sn);
|
|
|
|
monitor_printf(mon, "\n");
|
2010-08-04 21:55:48 +04:00
|
|
|
}
|
|
|
|
} else {
|
2016-07-07 08:26:04 +03:00
|
|
|
monitor_printf(mon, "None\n");
|
2010-08-04 21:55:48 +04:00
|
|
|
}
|
|
|
|
|
2016-07-07 08:26:04 +03:00
|
|
|
QTAILQ_FOREACH(image_entry, &image_list, next) {
|
|
|
|
if (QTAILQ_EMPTY(&image_entry->snapshots)) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
monitor_printf(mon,
|
|
|
|
"\nList of partial (non-loadable) snapshots on '%s':\n",
|
|
|
|
image_entry->imagename);
|
|
|
|
bdrv_snapshot_dump((fprintf_function)monitor_printf, mon, NULL);
|
|
|
|
monitor_printf(mon, "\n");
|
|
|
|
QTAILQ_FOREACH(snapshot_entry, &image_entry->snapshots, next) {
|
|
|
|
bdrv_snapshot_dump((fprintf_function)monitor_printf, mon,
|
|
|
|
&snapshot_entry->sn);
|
|
|
|
monitor_printf(mon, "\n");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
QTAILQ_FOREACH_SAFE(image_entry, &image_list, next, next_ie) {
|
|
|
|
SnapshotEntry *next_sn;
|
|
|
|
QTAILQ_FOREACH_SAFE(snapshot_entry, &image_entry->snapshots, next,
|
|
|
|
next_sn) {
|
|
|
|
g_free(snapshot_entry);
|
|
|
|
}
|
|
|
|
g_free(image_entry);
|
|
|
|
}
|
2011-08-21 07:09:37 +04:00
|
|
|
g_free(sn_tab);
|
2016-07-07 08:26:04 +03:00
|
|
|
g_free(global_snapshots);
|
2010-08-04 21:55:48 +04:00
|
|
|
|
2008-11-12 00:33:36 +03:00
|
|
|
}
|
2011-12-20 17:59:12 +04:00
|
|
|
|
|
|
|
void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev)
|
|
|
|
{
|
2016-05-10 05:04:59 +03:00
|
|
|
qemu_ram_set_idstr(mr->ram_block,
|
2011-12-20 17:59:12 +04:00
|
|
|
memory_region_name(mr), dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev)
|
|
|
|
{
|
2016-05-10 05:04:59 +03:00
|
|
|
qemu_ram_unset_idstr(mr->ram_block);
|
2011-12-20 17:59:12 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
void vmstate_register_ram_global(MemoryRegion *mr)
|
|
|
|
{
|
|
|
|
vmstate_register_ram(mr, NULL);
|
|
|
|
}
|