mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-09-06 18:05:37 +00:00
![Peter Maydell](/assets/img/avatar_default.png)
-----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJU5HCgAAoJEDhwtADrkYZT0gcP/ijfMUqLlOPMagm5ggDCx/HK IFFgcrynQNS6FwTNSIEW04So4q2EMbqwuTEpZ5pe330brGy0U/UgkVmz76BkyoXT 9LcgKwtVytfc/niF4k5nIKXrasNG1DHPrhd+zx/oTvwmC/8r+NqHZoPOjNaOPLCX 18SWJMy57l47XAzVOUoFHEW3mEO5YjF8qo3eRcbUWEWXkRp6wg/d2f9nkiHIAfcB 0XVso0PUJ3jID/WkNqb9JoexTnH5rQSkbeJVZWed8iSAt2cCi+pnE/RjL75M9VF8 3mPh2Zhi1lEV4qsYQH1OY7909RtKIj7EBDd7kuUWBi1oSIEaIn5GjNWBGCmBbPbY 0ZVhGFXFvvtI+tPEK3aqRSlyENReT29oKfEv0LAKoUQFBl+jb7qqBns4cfOF+i26 Tb4cnzqN1rdnlCNemTQATOrr01JAZEkdp3NHq+Bx967ocP3zxfL+pX2Q/3S8aFDs j9Ynq+3FvweeDKeYbHKKscELII1DZcNs1CYJOtJIl+XgzowfgpoTRP7P/e2qFM+z ey5qF8nc3mW8tVSkotMeeseFe9tj1xxIV+CslTRiYqnxHnmq4HgsN3DoDtnyy9De g3U0d9rgBKFPEkAWXg939GXbH2HVUqLkOSy50WGRruP4dzco7BhLyhQimqPchBFj b7P40f6NyWCYDhzJu6+N =Kleh -----END PGP SIGNATURE----- Merge remote-tracking branch 'remotes/armbru/tags/pull-monitor-2015-02-18' into staging hmp: Normalize HMP command handler names # gpg: Signature made Wed Feb 18 10:59:44 2015 GMT using RSA key ID EB918653 # gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" # gpg: aka "Markus Armbruster <armbru@pond.sub.org>" * remotes/armbru/tags/pull-monitor-2015-02-18: hmp: Name HMP info handler functions hmp_info_SUBCOMMAND() hmp: Name HMP command handler functions hmp_COMMAND() hmp: Clean up declarations for long-gone info handlers Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
1409 lines
39 KiB
C
1409 lines
39 KiB
C
/*
|
|
* QEMU System Emulator
|
|
*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include "config-host.h"
|
|
#include "qemu-common.h"
|
|
#include "hw/boards.h"
|
|
#include "hw/hw.h"
|
|
#include "hw/qdev.h"
|
|
#include "net/net.h"
|
|
#include "monitor/monitor.h"
|
|
#include "sysemu/sysemu.h"
|
|
#include "qemu/timer.h"
|
|
#include "audio/audio.h"
|
|
#include "migration/migration.h"
|
|
#include "qemu/sockets.h"
|
|
#include "qemu/queue.h"
|
|
#include "sysemu/cpus.h"
|
|
#include "exec/memory.h"
|
|
#include "qmp-commands.h"
|
|
#include "trace.h"
|
|
#include "qemu/iov.h"
|
|
#include "block/snapshot.h"
|
|
#include "block/qapi.h"
|
|
|
|
|
|
#ifndef ETH_P_RARP
|
|
#define ETH_P_RARP 0x8035
|
|
#endif
|
|
#define ARP_HTYPE_ETH 0x0001
|
|
#define ARP_PTYPE_IP 0x0800
|
|
#define ARP_OP_REQUEST_REV 0x3
|
|
|
|
static int announce_self_create(uint8_t *buf,
|
|
uint8_t *mac_addr)
|
|
{
|
|
/* 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) */
|
|
}
|
|
|
|
static void qemu_announce_self_iter(NICState *nic, void *opaque)
|
|
{
|
|
uint8_t buf[60];
|
|
int len;
|
|
|
|
trace_qemu_announce_self_iter(qemu_ether_ntoa(&nic->conf->macaddr));
|
|
len = announce_self_create(buf, nic->conf->macaddr.a);
|
|
|
|
qemu_send_packet_raw(qemu_get_queue(nic), buf, len);
|
|
}
|
|
|
|
|
|
static void qemu_announce_self_once(void *opaque)
|
|
{
|
|
static int count = SELF_ANNOUNCE_ROUNDS;
|
|
QEMUTimer *timer = *(QEMUTimer **)opaque;
|
|
|
|
qemu_foreach_nic(qemu_announce_self_iter, NULL);
|
|
|
|
if (--count) {
|
|
/* delay 50ms, 150ms, 250ms, ... */
|
|
timer_mod(timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) +
|
|
self_announce_delay(count));
|
|
} else {
|
|
timer_del(timer);
|
|
timer_free(timer);
|
|
}
|
|
}
|
|
|
|
void qemu_announce_self(void)
|
|
{
|
|
static QEMUTimer *timer;
|
|
timer = timer_new_ms(QEMU_CLOCK_REALTIME, qemu_announce_self_once, &timer);
|
|
qemu_announce_self_once(&timer);
|
|
}
|
|
|
|
/***********************************************************/
|
|
/* savevm/loadvm support */
|
|
|
|
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;
|
|
}
|
|
|
|
static int block_put_buffer(void *opaque, const uint8_t *buf,
|
|
int64_t pos, int size)
|
|
{
|
|
bdrv_save_vmstate(opaque, buf, pos, size);
|
|
return size;
|
|
}
|
|
|
|
static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
|
|
{
|
|
return bdrv_load_vmstate(opaque, buf, pos, size);
|
|
}
|
|
|
|
static int bdrv_fclose(void *opaque)
|
|
{
|
|
return bdrv_flush(opaque);
|
|
}
|
|
|
|
static const QEMUFileOps bdrv_read_ops = {
|
|
.get_buffer = block_get_buffer,
|
|
.close = bdrv_fclose
|
|
};
|
|
|
|
static const QEMUFileOps bdrv_write_ops = {
|
|
.put_buffer = block_put_buffer,
|
|
.writev_buffer = block_writev_buffer,
|
|
.close = bdrv_fclose
|
|
};
|
|
|
|
static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
|
|
{
|
|
if (is_writable) {
|
|
return qemu_fopen_ops(bs, &bdrv_write_ops);
|
|
}
|
|
return qemu_fopen_ops(bs, &bdrv_read_ops);
|
|
}
|
|
|
|
|
|
/* QEMUFile timer support.
|
|
* Not in qemu-file.c to not add qemu-timer.c as dependency to qemu-file.c
|
|
*/
|
|
|
|
void timer_put(QEMUFile *f, QEMUTimer *ts)
|
|
{
|
|
uint64_t expire_time;
|
|
|
|
expire_time = timer_expire_time_ns(ts);
|
|
qemu_put_be64(f, expire_time);
|
|
}
|
|
|
|
void timer_get(QEMUFile *f, QEMUTimer *ts)
|
|
{
|
|
uint64_t expire_time;
|
|
|
|
expire_time = qemu_get_be64(f);
|
|
if (expire_time != -1) {
|
|
timer_mod_ns(ts, expire_time);
|
|
} else {
|
|
timer_del(ts);
|
|
}
|
|
}
|
|
|
|
|
|
/* VMState timer support.
|
|
* Not in vmstate.c to not add qemu-timer.c as dependency to vmstate.c
|
|
*/
|
|
|
|
static int get_timer(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
QEMUTimer *v = pv;
|
|
timer_get(f, v);
|
|
return 0;
|
|
}
|
|
|
|
static void put_timer(QEMUFile *f, void *pv, size_t size)
|
|
{
|
|
QEMUTimer *v = pv;
|
|
timer_put(f, v);
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_timer = {
|
|
.name = "timer",
|
|
.get = get_timer,
|
|
.put = put_timer,
|
|
};
|
|
|
|
|
|
typedef struct CompatEntry {
|
|
char idstr[256];
|
|
int instance_id;
|
|
} CompatEntry;
|
|
|
|
typedef struct SaveStateEntry {
|
|
QTAILQ_ENTRY(SaveStateEntry) entry;
|
|
char idstr[256];
|
|
int instance_id;
|
|
int alias_id;
|
|
int version_id;
|
|
int section_id;
|
|
SaveVMHandlers *ops;
|
|
const VMStateDescription *vmsd;
|
|
void *opaque;
|
|
CompatEntry *compat;
|
|
int is_ram;
|
|
} SaveStateEntry;
|
|
|
|
|
|
static QTAILQ_HEAD(savevm_handlers, SaveStateEntry) savevm_handlers =
|
|
QTAILQ_HEAD_INITIALIZER(savevm_handlers);
|
|
static int global_section_id;
|
|
|
|
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,
|
|
const VMStateSubsection *subsection,
|
|
int indent)
|
|
{
|
|
if (subsection->vmsd != NULL) {
|
|
dump_vmstate_vmsd(out_file, subsection->vmsd, indent, true);
|
|
}
|
|
}
|
|
|
|
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) {
|
|
const VMStateSubsection *subsection = vmsd->subsections;
|
|
bool first;
|
|
|
|
fprintf(out_file, ",\n%*s\"Subsections\": [\n", indent, "");
|
|
first = true;
|
|
while (subsection->vmsd != NULL) {
|
|
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);
|
|
}
|
|
|
|
static int calculate_new_instance_id(const char *idstr)
|
|
{
|
|
SaveStateEntry *se;
|
|
int instance_id = 0;
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (strcmp(idstr, se->idstr) == 0
|
|
&& instance_id <= se->instance_id) {
|
|
instance_id = se->instance_id + 1;
|
|
}
|
|
}
|
|
return instance_id;
|
|
}
|
|
|
|
static int calculate_compat_instance_id(const char *idstr)
|
|
{
|
|
SaveStateEntry *se;
|
|
int instance_id = 0;
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (!se->compat) {
|
|
continue;
|
|
}
|
|
|
|
if (strcmp(idstr, se->compat->idstr) == 0
|
|
&& instance_id <= se->compat->instance_id) {
|
|
instance_id = se->compat->instance_id + 1;
|
|
}
|
|
}
|
|
return instance_id;
|
|
}
|
|
|
|
/* 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. */
|
|
int register_savevm_live(DeviceState *dev,
|
|
const char *idstr,
|
|
int instance_id,
|
|
int version_id,
|
|
SaveVMHandlers *ops,
|
|
void *opaque)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
se = g_malloc0(sizeof(SaveStateEntry));
|
|
se->version_id = version_id;
|
|
se->section_id = global_section_id++;
|
|
se->ops = ops;
|
|
se->opaque = opaque;
|
|
se->vmsd = NULL;
|
|
/* if this is a live_savem then set is_ram */
|
|
if (ops->save_live_setup != NULL) {
|
|
se->is_ram = 1;
|
|
}
|
|
|
|
if (dev) {
|
|
char *id = qdev_get_dev_path(dev);
|
|
if (id) {
|
|
pstrcpy(se->idstr, sizeof(se->idstr), id);
|
|
pstrcat(se->idstr, sizeof(se->idstr), "/");
|
|
g_free(id);
|
|
|
|
se->compat = g_malloc0(sizeof(CompatEntry));
|
|
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);
|
|
|
|
if (instance_id == -1) {
|
|
se->instance_id = calculate_new_instance_id(se->idstr);
|
|
} else {
|
|
se->instance_id = instance_id;
|
|
}
|
|
assert(!se->compat || se->instance_id == 0);
|
|
/* add at the end of list */
|
|
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
|
|
return 0;
|
|
}
|
|
|
|
int register_savevm(DeviceState *dev,
|
|
const char *idstr,
|
|
int instance_id,
|
|
int version_id,
|
|
SaveStateHandler *save_state,
|
|
LoadStateHandler *load_state,
|
|
void *opaque)
|
|
{
|
|
SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers));
|
|
ops->save_state = save_state;
|
|
ops->load_state = load_state;
|
|
return register_savevm_live(dev, idstr, instance_id, version_id,
|
|
ops, opaque);
|
|
}
|
|
|
|
void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque)
|
|
{
|
|
SaveStateEntry *se, *new_se;
|
|
char id[256] = "";
|
|
|
|
if (dev) {
|
|
char *path = qdev_get_dev_path(dev);
|
|
if (path) {
|
|
pstrcpy(id, sizeof(id), path);
|
|
pstrcat(id, sizeof(id), "/");
|
|
g_free(path);
|
|
}
|
|
}
|
|
pstrcat(id, sizeof(id), idstr);
|
|
|
|
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
|
|
if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
|
|
QTAILQ_REMOVE(&savevm_handlers, se, entry);
|
|
if (se->compat) {
|
|
g_free(se->compat);
|
|
}
|
|
g_free(se->ops);
|
|
g_free(se);
|
|
}
|
|
}
|
|
}
|
|
|
|
int vmstate_register_with_alias_id(DeviceState *dev, int instance_id,
|
|
const VMStateDescription *vmsd,
|
|
void *opaque, int alias_id,
|
|
int required_for_version)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
/* If this triggers, alias support can be dropped for the vmsd. */
|
|
assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
|
|
|
|
se = g_malloc0(sizeof(SaveStateEntry));
|
|
se->version_id = vmsd->version_id;
|
|
se->section_id = global_section_id++;
|
|
se->opaque = opaque;
|
|
se->vmsd = vmsd;
|
|
se->alias_id = alias_id;
|
|
|
|
if (dev) {
|
|
char *id = qdev_get_dev_path(dev);
|
|
if (id) {
|
|
pstrcpy(se->idstr, sizeof(se->idstr), id);
|
|
pstrcat(se->idstr, sizeof(se->idstr), "/");
|
|
g_free(id);
|
|
|
|
se->compat = g_malloc0(sizeof(CompatEntry));
|
|
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);
|
|
|
|
if (instance_id == -1) {
|
|
se->instance_id = calculate_new_instance_id(se->idstr);
|
|
} else {
|
|
se->instance_id = instance_id;
|
|
}
|
|
assert(!se->compat || se->instance_id == 0);
|
|
/* add at the end of list */
|
|
QTAILQ_INSERT_TAIL(&savevm_handlers, se, entry);
|
|
return 0;
|
|
}
|
|
|
|
void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd,
|
|
void *opaque)
|
|
{
|
|
SaveStateEntry *se, *new_se;
|
|
|
|
QTAILQ_FOREACH_SAFE(se, &savevm_handlers, entry, new_se) {
|
|
if (se->vmsd == vmsd && se->opaque == opaque) {
|
|
QTAILQ_REMOVE(&savevm_handlers, se, entry);
|
|
if (se->compat) {
|
|
g_free(se->compat);
|
|
}
|
|
g_free(se);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id)
|
|
{
|
|
trace_vmstate_load(se->idstr, se->vmsd ? se->vmsd->name : "(old)");
|
|
if (!se->vmsd) { /* Old style */
|
|
return se->ops->load_state(f, se->opaque, version_id);
|
|
}
|
|
return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
|
|
}
|
|
|
|
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)
|
|
{
|
|
trace_vmstate_save(se->idstr, se->vmsd ? se->vmsd->name : "(old)");
|
|
if (!se->vmsd) {
|
|
vmstate_save_old_style(f, se, vmdesc);
|
|
return;
|
|
}
|
|
vmstate_save_state(f, se->vmsd, se->opaque, vmdesc);
|
|
}
|
|
|
|
bool qemu_savevm_state_blocked(Error **errp)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (se->vmsd && se->vmsd->unmigratable) {
|
|
error_setg(errp, "State blocked by non-migratable device '%s'",
|
|
se->idstr);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void qemu_savevm_state_begin(QEMUFile *f,
|
|
const MigrationParams *params)
|
|
{
|
|
SaveStateEntry *se;
|
|
int ret;
|
|
|
|
trace_savevm_state_begin();
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (!se->ops || !se->ops->set_params) {
|
|
continue;
|
|
}
|
|
se->ops->set_params(params, se->opaque);
|
|
}
|
|
|
|
qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
|
|
qemu_put_be32(f, QEMU_VM_FILE_VERSION);
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
int len;
|
|
|
|
if (!se->ops || !se->ops->save_live_setup) {
|
|
continue;
|
|
}
|
|
if (se->ops && se->ops->is_active) {
|
|
if (!se->ops->is_active(se->opaque)) {
|
|
continue;
|
|
}
|
|
}
|
|
/* Section type */
|
|
qemu_put_byte(f, QEMU_VM_SECTION_START);
|
|
qemu_put_be32(f, se->section_id);
|
|
|
|
/* ID string */
|
|
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);
|
|
|
|
ret = se->ops->save_live_setup(f, se->opaque);
|
|
if (ret < 0) {
|
|
qemu_file_set_error(f, ret);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* this function has three return values:
|
|
* 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
|
|
*/
|
|
int qemu_savevm_state_iterate(QEMUFile *f)
|
|
{
|
|
SaveStateEntry *se;
|
|
int ret = 1;
|
|
|
|
trace_savevm_state_iterate();
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (!se->ops || !se->ops->save_live_iterate) {
|
|
continue;
|
|
}
|
|
if (se->ops && se->ops->is_active) {
|
|
if (!se->ops->is_active(se->opaque)) {
|
|
continue;
|
|
}
|
|
}
|
|
if (qemu_file_rate_limit(f)) {
|
|
return 0;
|
|
}
|
|
trace_savevm_section_start(se->idstr, se->section_id);
|
|
/* Section type */
|
|
qemu_put_byte(f, QEMU_VM_SECTION_PART);
|
|
qemu_put_be32(f, se->section_id);
|
|
|
|
ret = se->ops->save_live_iterate(f, se->opaque);
|
|
trace_savevm_section_end(se->idstr, se->section_id, ret);
|
|
|
|
if (ret < 0) {
|
|
qemu_file_set_error(f, ret);
|
|
}
|
|
if (ret <= 0) {
|
|
/* 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;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
void qemu_savevm_state_complete(QEMUFile *f)
|
|
{
|
|
QJSON *vmdesc;
|
|
int vmdesc_len;
|
|
SaveStateEntry *se;
|
|
int ret;
|
|
|
|
trace_savevm_state_complete();
|
|
|
|
cpu_synchronize_all_states();
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (!se->ops || !se->ops->save_live_complete) {
|
|
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(f, se->opaque);
|
|
trace_savevm_section_end(se->idstr, se->section_id, ret);
|
|
if (ret < 0) {
|
|
qemu_file_set_error(f, ret);
|
|
return;
|
|
}
|
|
}
|
|
|
|
vmdesc = qjson_new();
|
|
json_prop_int(vmdesc, "page_size", TARGET_PAGE_SIZE);
|
|
json_start_array(vmdesc, "devices");
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
int len;
|
|
|
|
if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
|
|
continue;
|
|
}
|
|
trace_savevm_section_start(se->idstr, se->section_id);
|
|
|
|
json_start_object(vmdesc, NULL);
|
|
json_prop_str(vmdesc, "name", se->idstr);
|
|
json_prop_int(vmdesc, "instance_id", se->instance_id);
|
|
|
|
/* Section type */
|
|
qemu_put_byte(f, QEMU_VM_SECTION_FULL);
|
|
qemu_put_be32(f, se->section_id);
|
|
|
|
/* ID string */
|
|
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);
|
|
|
|
vmstate_save(f, se, vmdesc);
|
|
|
|
json_end_object(vmdesc);
|
|
trace_savevm_section_end(se->idstr, se->section_id, 0);
|
|
}
|
|
|
|
qemu_put_byte(f, QEMU_VM_EOF);
|
|
|
|
json_end_array(vmdesc);
|
|
qjson_finish(vmdesc);
|
|
vmdesc_len = strlen(qjson_get_str(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);
|
|
object_unref(OBJECT(vmdesc));
|
|
|
|
qemu_fflush(f);
|
|
}
|
|
|
|
uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size)
|
|
{
|
|
SaveStateEntry *se;
|
|
uint64_t ret = 0;
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (!se->ops || !se->ops->save_live_pending) {
|
|
continue;
|
|
}
|
|
if (se->ops && se->ops->is_active) {
|
|
if (!se->ops->is_active(se->opaque)) {
|
|
continue;
|
|
}
|
|
}
|
|
ret += se->ops->save_live_pending(f, se->opaque, max_size);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
void qemu_savevm_state_cancel(void)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
trace_savevm_state_cancel();
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (se->ops && se->ops->cancel) {
|
|
se->ops->cancel(se->opaque);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int qemu_savevm_state(QEMUFile *f, Error **errp)
|
|
{
|
|
int ret;
|
|
MigrationParams params = {
|
|
.blk = 0,
|
|
.shared = 0
|
|
};
|
|
|
|
if (qemu_savevm_state_blocked(errp)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
qemu_mutex_unlock_iothread();
|
|
qemu_savevm_state_begin(f, ¶ms);
|
|
qemu_mutex_lock_iothread();
|
|
|
|
while (qemu_file_get_error(f) == 0) {
|
|
if (qemu_savevm_state_iterate(f) > 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
ret = qemu_file_get_error(f);
|
|
if (ret == 0) {
|
|
qemu_savevm_state_complete(f);
|
|
ret = qemu_file_get_error(f);
|
|
}
|
|
if (ret != 0) {
|
|
qemu_savevm_state_cancel();
|
|
error_setg_errno(errp, -ret, "Error while writing VM state");
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
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();
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
int len;
|
|
|
|
if (se->is_ram) {
|
|
continue;
|
|
}
|
|
if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
|
|
continue;
|
|
}
|
|
|
|
/* Section type */
|
|
qemu_put_byte(f, QEMU_VM_SECTION_FULL);
|
|
qemu_put_be32(f, se->section_id);
|
|
|
|
/* ID string */
|
|
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);
|
|
|
|
vmstate_save(f, se, NULL);
|
|
}
|
|
|
|
qemu_put_byte(f, QEMU_VM_EOF);
|
|
|
|
return qemu_file_get_error(f);
|
|
}
|
|
|
|
static SaveStateEntry *find_se(const char *idstr, int instance_id)
|
|
{
|
|
SaveStateEntry *se;
|
|
|
|
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
|
|
if (!strcmp(se->idstr, idstr) &&
|
|
(instance_id == se->instance_id ||
|
|
instance_id == se->alias_id))
|
|
return se;
|
|
/* 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;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
typedef struct LoadStateEntry {
|
|
QLIST_ENTRY(LoadStateEntry) entry;
|
|
SaveStateEntry *se;
|
|
int section_id;
|
|
int version_id;
|
|
} LoadStateEntry;
|
|
|
|
int qemu_loadvm_state(QEMUFile *f)
|
|
{
|
|
QLIST_HEAD(, LoadStateEntry) loadvm_handlers =
|
|
QLIST_HEAD_INITIALIZER(loadvm_handlers);
|
|
LoadStateEntry *le, *new_le;
|
|
Error *local_err = NULL;
|
|
uint8_t section_type;
|
|
unsigned int v;
|
|
int ret;
|
|
|
|
if (qemu_savevm_state_blocked(&local_err)) {
|
|
error_report("%s", error_get_pretty(local_err));
|
|
error_free(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;
|
|
}
|
|
|
|
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
|
|
uint32_t instance_id, version_id, section_id;
|
|
SaveStateEntry *se;
|
|
char idstr[257];
|
|
int len;
|
|
|
|
trace_qemu_loadvm_state_section(section_type);
|
|
switch (section_type) {
|
|
case QEMU_VM_SECTION_START:
|
|
case QEMU_VM_SECTION_FULL:
|
|
/* Read section start */
|
|
section_id = qemu_get_be32(f);
|
|
len = qemu_get_byte(f);
|
|
qemu_get_buffer(f, (uint8_t *)idstr, len);
|
|
idstr[len] = 0;
|
|
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);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Validate version */
|
|
if (version_id > se->version_id) {
|
|
error_report("savevm: unsupported version %d for '%s' v%d",
|
|
version_id, idstr, se->version_id);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Add entry */
|
|
le = g_malloc0(sizeof(*le));
|
|
|
|
le->se = se;
|
|
le->section_id = section_id;
|
|
le->version_id = version_id;
|
|
QLIST_INSERT_HEAD(&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);
|
|
goto out;
|
|
}
|
|
break;
|
|
case QEMU_VM_SECTION_PART:
|
|
case QEMU_VM_SECTION_END:
|
|
section_id = qemu_get_be32(f);
|
|
|
|
trace_qemu_loadvm_state_section_partend(section_id);
|
|
QLIST_FOREACH(le, &loadvm_handlers, entry) {
|
|
if (le->section_id == section_id) {
|
|
break;
|
|
}
|
|
}
|
|
if (le == NULL) {
|
|
error_report("Unknown savevm section %d", section_id);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
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);
|
|
goto out;
|
|
}
|
|
break;
|
|
default:
|
|
error_report("Unknown savevm section type %d", section_type);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
cpu_synchronize_all_post_init();
|
|
|
|
ret = 0;
|
|
|
|
out:
|
|
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) {
|
|
QLIST_REMOVE(le, entry);
|
|
g_free(le);
|
|
}
|
|
|
|
if (ret == 0) {
|
|
ret = qemu_file_get_error(f);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static BlockDriverState *find_vmstate_bs(void)
|
|
{
|
|
BlockDriverState *bs = NULL;
|
|
while ((bs = bdrv_next(bs))) {
|
|
if (bdrv_can_snapshot(bs)) {
|
|
return bs;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Deletes snapshots of a given name in all opened images.
|
|
*/
|
|
static int del_existing_snapshots(Monitor *mon, const char *name)
|
|
{
|
|
BlockDriverState *bs;
|
|
QEMUSnapshotInfo sn1, *snapshot = &sn1;
|
|
Error *err = NULL;
|
|
|
|
bs = NULL;
|
|
while ((bs = bdrv_next(bs))) {
|
|
if (bdrv_can_snapshot(bs) &&
|
|
bdrv_snapshot_find(bs, snapshot, name) >= 0) {
|
|
bdrv_snapshot_delete_by_id_or_name(bs, name, &err);
|
|
if (err) {
|
|
monitor_printf(mon,
|
|
"Error while deleting snapshot on device '%s':"
|
|
" %s\n",
|
|
bdrv_get_device_name(bs),
|
|
error_get_pretty(err));
|
|
error_free(err);
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void hmp_savevm(Monitor *mon, const QDict *qdict)
|
|
{
|
|
BlockDriverState *bs, *bs1;
|
|
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
|
|
int ret;
|
|
QEMUFile *f;
|
|
int saved_vm_running;
|
|
uint64_t vm_state_size;
|
|
qemu_timeval tv;
|
|
struct tm tm;
|
|
const char *name = qdict_get_try_str(qdict, "name");
|
|
Error *local_err = NULL;
|
|
|
|
/* Verify if there is a device that doesn't support snapshots and is writable */
|
|
bs = NULL;
|
|
while ((bs = bdrv_next(bs))) {
|
|
|
|
if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
|
|
continue;
|
|
}
|
|
|
|
if (!bdrv_can_snapshot(bs)) {
|
|
monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n",
|
|
bdrv_get_device_name(bs));
|
|
return;
|
|
}
|
|
}
|
|
|
|
bs = find_vmstate_bs();
|
|
if (!bs) {
|
|
monitor_printf(mon, "No block device can accept snapshots\n");
|
|
return;
|
|
}
|
|
|
|
saved_vm_running = runstate_is_running();
|
|
vm_stop(RUN_STATE_SAVE_VM);
|
|
|
|
memset(sn, 0, sizeof(*sn));
|
|
|
|
/* fill auxiliary fields */
|
|
qemu_gettimeofday(&tv);
|
|
sn->date_sec = tv.tv_sec;
|
|
sn->date_nsec = tv.tv_usec * 1000;
|
|
sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
|
|
|
|
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 {
|
|
/* cast below needed for OpenBSD where tv_sec is still 'long' */
|
|
localtime_r((const time_t *)&tv.tv_sec, &tm);
|
|
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm);
|
|
}
|
|
|
|
/* Delete old snapshots of the same name */
|
|
if (name && del_existing_snapshots(mon, name) < 0) {
|
|
goto the_end;
|
|
}
|
|
|
|
/* save the VM state */
|
|
f = qemu_fopen_bdrv(bs, 1);
|
|
if (!f) {
|
|
monitor_printf(mon, "Could not open VM state file\n");
|
|
goto the_end;
|
|
}
|
|
ret = qemu_savevm_state(f, &local_err);
|
|
vm_state_size = qemu_ftell(f);
|
|
qemu_fclose(f);
|
|
if (ret < 0) {
|
|
monitor_printf(mon, "%s\n", error_get_pretty(local_err));
|
|
error_free(local_err);
|
|
goto the_end;
|
|
}
|
|
|
|
/* create the snapshots */
|
|
|
|
bs1 = NULL;
|
|
while ((bs1 = bdrv_next(bs1))) {
|
|
if (bdrv_can_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));
|
|
}
|
|
}
|
|
}
|
|
|
|
the_end:
|
|
if (saved_vm_running) {
|
|
vm_start();
|
|
}
|
|
}
|
|
|
|
void qmp_xen_save_devices_state(const char *filename, Error **errp)
|
|
{
|
|
QEMUFile *f;
|
|
int saved_vm_running;
|
|
int ret;
|
|
|
|
saved_vm_running = runstate_is_running();
|
|
vm_stop(RUN_STATE_SAVE_VM);
|
|
|
|
f = qemu_fopen(filename, "wb");
|
|
if (!f) {
|
|
error_setg_file_open(errp, errno, filename);
|
|
goto the_end;
|
|
}
|
|
ret = qemu_save_device_state(f);
|
|
qemu_fclose(f);
|
|
if (ret < 0) {
|
|
error_set(errp, QERR_IO_ERROR);
|
|
}
|
|
|
|
the_end:
|
|
if (saved_vm_running) {
|
|
vm_start();
|
|
}
|
|
}
|
|
|
|
int load_vmstate(const char *name)
|
|
{
|
|
BlockDriverState *bs, *bs_vm_state;
|
|
QEMUSnapshotInfo sn;
|
|
QEMUFile *f;
|
|
int ret;
|
|
|
|
bs_vm_state = find_vmstate_bs();
|
|
if (!bs_vm_state) {
|
|
error_report("No block device supports snapshots");
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
/* Don't even try to load empty VM states */
|
|
ret = bdrv_snapshot_find(bs_vm_state, &sn, name);
|
|
if (ret < 0) {
|
|
return ret;
|
|
} else if (sn.vm_state_size == 0) {
|
|
error_report("This is a disk-only snapshot. Revert to it offline "
|
|
"using qemu-img.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Verify if there is any device that doesn't support snapshots and is
|
|
writable and check if the requested snapshot is available too. */
|
|
bs = NULL;
|
|
while ((bs = bdrv_next(bs))) {
|
|
|
|
if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
|
|
continue;
|
|
}
|
|
|
|
if (!bdrv_can_snapshot(bs)) {
|
|
error_report("Device '%s' is writable but does not support snapshots.",
|
|
bdrv_get_device_name(bs));
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
ret = bdrv_snapshot_find(bs, &sn, name);
|
|
if (ret < 0) {
|
|
error_report("Device '%s' does not have the requested snapshot '%s'",
|
|
bdrv_get_device_name(bs), name);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Flush all IO requests so they don't interfere with the new state. */
|
|
bdrv_drain_all();
|
|
|
|
bs = NULL;
|
|
while ((bs = bdrv_next(bs))) {
|
|
if (bdrv_can_snapshot(bs)) {
|
|
ret = bdrv_snapshot_goto(bs, name);
|
|
if (ret < 0) {
|
|
error_report("Error %d while activating snapshot '%s' on '%s'",
|
|
ret, name, bdrv_get_device_name(bs));
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* restore the VM state */
|
|
f = qemu_fopen_bdrv(bs_vm_state, 0);
|
|
if (!f) {
|
|
error_report("Could not open VM state file");
|
|
return -EINVAL;
|
|
}
|
|
|
|
qemu_system_reset(VMRESET_SILENT);
|
|
ret = qemu_loadvm_state(f);
|
|
|
|
qemu_fclose(f);
|
|
if (ret < 0) {
|
|
error_report("Error %d while loading VM state", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void hmp_delvm(Monitor *mon, const QDict *qdict)
|
|
{
|
|
BlockDriverState *bs;
|
|
Error *err;
|
|
const char *name = qdict_get_str(qdict, "name");
|
|
|
|
if (!find_vmstate_bs()) {
|
|
monitor_printf(mon, "No block device supports snapshots\n");
|
|
return;
|
|
}
|
|
|
|
bs = NULL;
|
|
while ((bs = bdrv_next(bs))) {
|
|
if (bdrv_can_snapshot(bs)) {
|
|
err = NULL;
|
|
bdrv_snapshot_delete_by_id_or_name(bs, name, &err);
|
|
if (err) {
|
|
monitor_printf(mon,
|
|
"Error while deleting snapshot on device '%s':"
|
|
" %s\n",
|
|
bdrv_get_device_name(bs),
|
|
error_get_pretty(err));
|
|
error_free(err);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
|
|
{
|
|
BlockDriverState *bs, *bs1;
|
|
QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s;
|
|
int nb_sns, i, ret, available;
|
|
int total;
|
|
int *available_snapshots;
|
|
|
|
bs = find_vmstate_bs();
|
|
if (!bs) {
|
|
monitor_printf(mon, "No available block device supports snapshots\n");
|
|
return;
|
|
}
|
|
|
|
nb_sns = bdrv_snapshot_list(bs, &sn_tab);
|
|
if (nb_sns < 0) {
|
|
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
|
|
return;
|
|
}
|
|
|
|
if (nb_sns == 0) {
|
|
monitor_printf(mon, "There is no snapshot available.\n");
|
|
return;
|
|
}
|
|
|
|
available_snapshots = g_malloc0(sizeof(int) * nb_sns);
|
|
total = 0;
|
|
for (i = 0; i < nb_sns; i++) {
|
|
sn = &sn_tab[i];
|
|
available = 1;
|
|
bs1 = NULL;
|
|
|
|
while ((bs1 = bdrv_next(bs1))) {
|
|
if (bdrv_can_snapshot(bs1) && bs1 != bs) {
|
|
ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str);
|
|
if (ret < 0) {
|
|
available = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (available) {
|
|
available_snapshots[total] = i;
|
|
total++;
|
|
}
|
|
}
|
|
|
|
if (total > 0) {
|
|
bdrv_snapshot_dump((fprintf_function)monitor_printf, mon, NULL);
|
|
monitor_printf(mon, "\n");
|
|
for (i = 0; i < total; i++) {
|
|
sn = &sn_tab[available_snapshots[i]];
|
|
bdrv_snapshot_dump((fprintf_function)monitor_printf, mon, sn);
|
|
monitor_printf(mon, "\n");
|
|
}
|
|
} else {
|
|
monitor_printf(mon, "There is no suitable snapshot available\n");
|
|
}
|
|
|
|
g_free(sn_tab);
|
|
g_free(available_snapshots);
|
|
|
|
}
|
|
|
|
void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev)
|
|
{
|
|
qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK,
|
|
memory_region_name(mr), dev);
|
|
}
|
|
|
|
void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev)
|
|
{
|
|
qemu_ram_unset_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK);
|
|
}
|
|
|
|
void vmstate_register_ram_global(MemoryRegion *mr)
|
|
{
|
|
vmstate_register_ram(mr, NULL);
|
|
}
|