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migration/next for 20170517 

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Merge remote-tracking branch 'quintela/tags/migration/20170517' into staging

migration/next for 20170517

# gpg: Signature made Wed 17 May 2017 11:46:36 AM BST
# gpg:                using RSA key 0xF487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>"
# gpg:                 aka "Juan Quintela <quintela@trasno.org>"
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* quintela/tags/migration/20170517:
  migration: Move check_migratable() into qdev.c
  migration: Move postcopy stuff to postcopy-ram.c
  migration: Move page_cache.c to migration/
  migration: Create migration/blocker.h
  ram: Rename RAM_SAVE_FLAG_COMPRESS to RAM_SAVE_FLAG_ZERO
  migration: Pass Error ** argument to {save,load}_vmstate
  migration: Fix regression with compression threads

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2017-05-18 10:05:50 +01:00
parent adb354dd1e 1bfe5f0586
commit 2ccbd47c1d
36 changed files with 194 additions and 158 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Makefile.objs
View File

@ -49,7 +49,6 @@ common-obj-$(CONFIG_POSIX) += os-posix.o
common-obj-$(CONFIG_LINUX) += fsdev/
common-obj-y += migration/
common-obj-y += page_cache.o #aio.o
common-obj-$(CONFIG_SPICE) += spice-qemu-char.o

2
block/qcow.c
View File

@ -32,7 +32,7 @@
#include <zlib.h>
#include "qapi/qmp/qerror.h"
#include "crypto/cipher.h"
#include "migration/migration.h"
#include "migration/blocker.h"
/**************************************************************/
/* QEMU COW block driver with compression and encryption support */

2
block/vdi.c
View File

@ -55,7 +55,7 @@
#include "sysemu/block-backend.h"
#include "qemu/module.h"
#include "qemu/bswap.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#include "qemu/coroutine.h"
#include "qemu/cutils.h"
#include "qemu/uuid.h"

2
block/vhdx.c
View File

@ -24,7 +24,7 @@
#include "qemu/crc32c.h"
#include "qemu/bswap.h"
#include "block/vhdx.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#include "qemu/uuid.h"
/* Options for VHDX creation */

2
block/vmdk.c
View File

@ -31,7 +31,7 @@
#include "qemu/error-report.h"
#include "qemu/module.h"
#include "qemu/bswap.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#include "qemu/cutils.h"
#include <zlib.h>

2
block/vpc.c
View File

@ -28,7 +28,7 @@
#include "block/block_int.h"
#include "sysemu/block-backend.h"
#include "qemu/module.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#include "qemu/bswap.h"
#include "qemu/uuid.h"

2
block/vvfat.c
View File

@ -28,7 +28,7 @@
#include "block/block_int.h"
#include "qemu/module.h"
#include "qemu/bswap.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#include "qapi/qmp/qint.h"
#include "qapi/qmp/qbool.h"
#include "qapi/qmp/qstring.h"

9
hmp.c
View File

@ -1274,17 +1274,22 @@ void hmp_loadvm(Monitor *mon, const QDict *qdict)
{
int saved_vm_running = runstate_is_running();
const char *name = qdict_get_str(qdict, "name");
Error *err = NULL;
vm_stop(RUN_STATE_RESTORE_VM);
if (load_vmstate(name) == 0 && saved_vm_running) {
if (load_vmstate(name, &err) == 0 && saved_vm_running) {
vm_start();
}
hmp_handle_error(mon, &err);
}
void hmp_savevm(Monitor *mon, const QDict *qdict)
{
save_vmstate(qdict_get_try_str(qdict, "name"));
Error *err = NULL;
save_vmstate(qdict_get_try_str(qdict, "name"), &err);
hmp_handle_error(mon, &err);
}
void hmp_delvm(Monitor *mon, const QDict *qdict)

2
hw/9pfs/9p.c
View File

@ -23,7 +23,7 @@
#include "9p-xattr.h"
#include "coth.h"
#include "trace.h"
#include "migration/migration.h"
#include "migration/blocker.h"
int open_fd_hw;
int total_open_fd;

20
hw/core/qdev.c
View File

@ -37,7 +37,7 @@
#include "hw/boards.h"
#include "hw/sysbus.h"
#include "qapi-event.h"
#include "migration/migration.h"
#include "migration/vmstate.h"
bool qdev_hotplug = false;
static bool qdev_hot_added = false;
@ -861,6 +861,20 @@ static bool device_get_realized(Object *obj, Error **errp)
return dev->realized;
}
static bool check_only_migratable(Object *obj, Error **err)
{
DeviceClass *dc = DEVICE_GET_CLASS(obj);
if (!vmstate_check_only_migratable(dc->vmsd)) {
error_setg(err, "Device %s is not migratable, but "
"--only-migratable was specified",
object_get_typename(obj));
return false;
}
return true;
}
static void device_set_realized(Object *obj, bool value, Error **errp)
{
DeviceState *dev = DEVICE(obj);
@ -870,7 +884,6 @@ static void device_set_realized(Object *obj, bool value, Error **errp)
Error *local_err = NULL;
bool unattached_parent = false;
static int unattached_count;
int ret;
if (dev->hotplugged && !dc->hotpluggable) {
error_setg(errp, QERR_DEVICE_NO_HOTPLUG, object_get_typename(obj));
@ -878,8 +891,7 @@ static void device_set_realized(Object *obj, bool value, Error **errp)
}
if (value && !dev->realized) {
ret = check_migratable(obj, &local_err);
if (ret < 0) {
if (!check_only_migratable(obj, &local_err)) {
goto fail;
}

2
hw/display/qxl.c
View File

@ -26,7 +26,7 @@
#include "qemu/queue.h"
#include "qemu/atomic.h"
#include "sysemu/sysemu.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#include "trace.h"
#include "qxl.h"

2
hw/display/virtio-gpu.c
View File

@ -19,7 +19,7 @@
#include "hw/virtio/virtio.h"
#include "hw/virtio/virtio-gpu.h"
#include "hw/virtio/virtio-bus.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#include "qemu/log.h"
#include "qapi/error.h"

2
hw/intc/arm_gic_kvm.c
View File

@ -24,7 +24,7 @@
#include "qemu-common.h"
#include "cpu.h"
#include "hw/sysbus.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#include "sysemu/kvm.h"
#include "kvm_arm.h"
#include "gic_internal.h"

2
hw/intc/arm_gicv3_its_kvm.c
View File

@ -24,7 +24,7 @@
#include "sysemu/sysemu.h"
#include "sysemu/kvm.h"
#include "kvm_arm.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#define TYPE_KVM_ARM_ITS "arm-its-kvm"
#define KVM_ARM_ITS(obj) OBJECT_CHECK(GICv3ITSState, (obj), TYPE_KVM_ARM_ITS)

2
hw/intc/arm_gicv3_kvm.c
View File

@ -28,7 +28,7 @@
#include "kvm_arm.h"
#include "gicv3_internal.h"
#include "vgic_common.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#ifdef DEBUG_GICV3_KVM
#define DPRINTF(fmt, ...) \

2
hw/misc/ivshmem.c
View File

@ -25,7 +25,7 @@
#include "hw/pci/msi.h"
#include "hw/pci/msix.h"
#include "sysemu/kvm.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#include "qemu/error-report.h"
#include "qemu/event_notifier.h"
#include "qom/object_interfaces.h"

2
hw/scsi/vhost-scsi.c
View File

@ -21,7 +21,7 @@
#include "qemu/error-report.h"
#include "qemu/queue.h"
#include "monitor/monitor.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#include "hw/virtio/vhost-scsi.h"
#include "hw/virtio/vhost.h"
#include "hw/virtio/virtio-scsi.h"

2
hw/virtio/vhost.c
View File

@ -25,7 +25,7 @@
#include "exec/address-spaces.h"
#include "hw/virtio/virtio-bus.h"
#include "hw/virtio/virtio-access.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#include "sysemu/dma.h"
/* enabled until disconnected backend stabilizes */

35
include/migration/blocker.h Normal file
View File

@ -0,0 +1,35 @@
/*
* QEMU migration blockers
*
* Copyright IBM, Corp. 2008
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#ifndef MIGRATION_BLOCKER_H
#define MIGRATION_BLOCKER_H
/**
* @migrate_add_blocker - prevent migration from proceeding
*
* @reason - an error to be returned whenever migration is attempted
*
* @errp - [out] The reason (if any) we cannot block migration right now.
*
* @returns - 0 on success, -EBUSY/-EACCES on failure, with errp set.
*/
int migrate_add_blocker(Error *reason, Error **errp);
/**
* @migrate_del_blocker - remove a blocking error from migration
*
* @reason - the error blocking migration
*/
void migrate_del_blocker(Error *reason);
#endif

50
include/migration/migration.h
View File

@ -22,7 +22,6 @@
#include "qapi-types.h"
#include "exec/cpu-common.h"
#include "qemu/coroutine_int.h"
#include "qom/object.h"
#define QEMU_VM_FILE_MAGIC 0x5145564d
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
@ -39,9 +38,6 @@
#define QEMU_VM_COMMAND 0x08
#define QEMU_VM_SECTION_FOOTER 0x7e
/* for vl.c */
extern int only_migratable;
struct MigrationParams {
bool blk;
bool shared;
@ -61,28 +57,6 @@ enum mig_rp_message_type {
typedef QLIST_HEAD(, LoadStateEntry) LoadStateEntry_Head;
/* The current postcopy state is read/set by postcopy_state_get/set
* which update it atomically.
* The state is updated as postcopy messages are received, and
* in general only one thread should be writing to the state at any one
* time, initially the main thread and then the listen thread;
* Corner cases are where either thread finishes early and/or errors.
* The state is checked as messages are received to ensure that
* the source is sending us messages in the correct order.
* The state is also used by the RAM reception code to know if it
* has to place pages atomically, and the cleanup code at the end of
* the main thread to know if it has to delay cleanup until the end
* of postcopy.
*/
typedef enum {
POSTCOPY_INCOMING_NONE = 0, /* Initial state - no postcopy */
POSTCOPY_INCOMING_ADVISE,
POSTCOPY_INCOMING_DISCARD,
POSTCOPY_INCOMING_LISTENING,
POSTCOPY_INCOMING_RUNNING,
POSTCOPY_INCOMING_END
} PostcopyState;
/* State for the incoming migration */
struct MigrationIncomingState {
QEMUFile *from_src_file;
@ -275,26 +249,6 @@ int ram_discard_range(const char *block_name, uint64_t start, size_t length);
int ram_postcopy_incoming_init(MigrationIncomingState *mis);
void ram_postcopy_migrated_memory_release(MigrationState *ms);
/**
* @migrate_add_blocker - prevent migration from proceeding
*
* @reason - an error to be returned whenever migration is attempted
*
* @errp - [out] The reason (if any) we cannot block migration right now.
*
* @returns - 0 on success, -EBUSY/-EACCES on failure, with errp set.
*/
int migrate_add_blocker(Error *reason, Error **errp);
/**
* @migrate_del_blocker - remove a blocking error from migration
*
* @reason - the error blocking migration
*/
void migrate_del_blocker(Error *reason);
int check_migratable(Object *obj, Error **err);
bool migrate_release_ram(void);
bool migrate_postcopy_ram(void);
bool migrate_zero_blocks(void);
@ -357,8 +311,4 @@ void global_state_store_running(void);
void migration_page_queue_free(void);
int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len);
uint64_t ram_pagesize_summary(void);
PostcopyState postcopy_state_get(void);
/* Set the state and return the old state */
PostcopyState postcopy_state_set(PostcopyState new_state);
#endif

2
include/migration/vmstate.h
View File

@ -1067,4 +1067,6 @@ int64_t self_announce_delay(int round)
void dump_vmstate_json_to_file(FILE *out_fp);
bool vmstate_check_only_migratable(const VMStateDescription *vmsd);
#endif

6
include/sysemu/sysemu.h
View File

@ -15,7 +15,7 @@
/* vl.c */
extern const char *bios_name;
extern int only_migratable;
extern const char *qemu_name;
extern QemuUUID qemu_uuid;
extern bool qemu_uuid_set;
@ -75,8 +75,8 @@ void qemu_remove_exit_notifier(Notifier *notify);
void qemu_add_machine_init_done_notifier(Notifier *notify);
void qemu_remove_machine_init_done_notifier(Notifier *notify);
int save_vmstate(const char *name);
int load_vmstate(const char *name);
int save_vmstate(const char *name, Error **errp);
int load_vmstate(const char *name, Error **errp);
void qemu_announce_self(void);

2
migration/Makefile.objs
View File

@ -1,7 +1,7 @@
common-obj-y += migration.o socket.o fd.o exec.o
common-obj-y += tls.o
common-obj-y += colo-comm.o colo.o colo-failover.o
common-obj-y += vmstate.o
common-obj-y += vmstate.o page_cache.o
common-obj-y += qemu-file.o
common-obj-y += qemu-file-channel.o
common-obj-y += xbzrle.o postcopy-ram.o

34
migration/migration.c
View File

@ -17,6 +17,7 @@
#include "qemu/cutils.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
#include "migration/blocker.h"
#include "migration/migration.h"
#include "migration/qemu-file.h"
#include "sysemu/sysemu.h"
@ -77,13 +78,6 @@ static NotifierList migration_state_notifiers =
static bool deferred_incoming;
/*
* Current state of incoming postcopy; note this is not part of
* MigrationIncomingState since it's state is used during cleanup
* at the end as MIS is being freed.
*/
static PostcopyState incoming_postcopy_state;
/* When we add fault tolerance, we could have several
migrations at once. For now we don't need to add
dynamic creation of migration */
@ -1149,21 +1143,6 @@ void migrate_del_blocker(Error *reason)
migration_blockers = g_slist_remove(migration_blockers, reason);
}
int check_migratable(Object *obj, Error **err)
{
DeviceClass *dc = DEVICE_GET_CLASS(obj);
if (only_migratable && dc->vmsd) {
if (dc->vmsd->unmigratable) {
error_setg(err, "Device %s is not migratable, but "
"--only-migratable was specified",
object_get_typename(obj));
return -1;
}
}
return 0;
}
void qmp_migrate_incoming(const char *uri, Error **errp)
{
Error *local_err = NULL;
@ -2097,14 +2076,3 @@ void migrate_fd_connect(MigrationState *s)
s->migration_thread_running = true;
}
PostcopyState postcopy_state_get(void)
{
return atomic_mb_read(&incoming_postcopy_state);
}
/* Set the state and return the old state */
PostcopyState postcopy_state_set(PostcopyState new_state)
{
return atomic_xchg(&incoming_postcopy_state, new_state);
}

0
page_cache.c → migration/page_cache.c
View File

0
include/migration/page_cache.h → migration/page_cache.h
View File

18
migration/postcopy-ram.c
View File

@ -784,3 +784,21 @@ void postcopy_discard_send_finish(MigrationState *ms, PostcopyDiscardState *pds)
g_free(pds);
}
/*
* Current state of incoming postcopy; note this is not part of
* MigrationIncomingState since it's state is used during cleanup
* at the end as MIS is being freed.
*/
static PostcopyState incoming_postcopy_state;
PostcopyState postcopy_state_get(void)
{
return atomic_mb_read(&incoming_postcopy_state);
}
/* Set the state and return the old state */
PostcopyState postcopy_state_set(PostcopyState new_state)
{
return atomic_xchg(&incoming_postcopy_state, new_state);
}

26
migration/postcopy-ram.h
View File

@ -81,6 +81,28 @@ int postcopy_place_page(MigrationIncomingState *mis, void *host, void *from,
int postcopy_place_page_zero(MigrationIncomingState *mis, void *host,
size_t pagesize);
/* The current postcopy state is read/set by postcopy_state_get/set
* which update it atomically.
* The state is updated as postcopy messages are received, and
* in general only one thread should be writing to the state at any one
* time, initially the main thread and then the listen thread;
* Corner cases are where either thread finishes early and/or errors.
* The state is checked as messages are received to ensure that
* the source is sending us messages in the correct order.
* The state is also used by the RAM reception code to know if it
* has to place pages atomically, and the cleanup code at the end of
* the main thread to know if it has to delay cleanup until the end
* of postcopy.
*/
typedef enum {
POSTCOPY_INCOMING_NONE = 0, /* Initial state - no postcopy */
POSTCOPY_INCOMING_ADVISE,
POSTCOPY_INCOMING_DISCARD,
POSTCOPY_INCOMING_LISTENING,
POSTCOPY_INCOMING_RUNNING,
POSTCOPY_INCOMING_END
} PostcopyState;
/*
* Allocate a page of memory that can be mapped at a later point in time
* using postcopy_place_page
@ -88,4 +110,8 @@ int postcopy_place_page_zero(MigrationIncomingState *mis, void *host,
*/
void *postcopy_get_tmp_page(MigrationIncomingState *mis);
PostcopyState postcopy_state_get(void);
/* Set the state and return the old state */
PostcopyState postcopy_state_set(PostcopyState new_state);
#endif

35
migration/ram.c
View File

@ -48,8 +48,14 @@
/***********************************************************/
/* ram save/restore */
/* RAM_SAVE_FLAG_ZERO used to be named RAM_SAVE_FLAG_COMPRESS, it
* worked for pages that where filled with the same char. We switched
* it to only search for the zero value. And to avoid confusion with
* RAM_SSAVE_FLAG_COMPRESS_PAGE just rename it.
*/
#define RAM_SAVE_FLAG_FULL 0x01 /* Obsolete, not used anymore */
#define RAM_SAVE_FLAG_COMPRESS 0x02
#define RAM_SAVE_FLAG_ZERO 0x02
#define RAM_SAVE_FLAG_MEM_SIZE 0x04
#define RAM_SAVE_FLAG_PAGE 0x08
#define RAM_SAVE_FLAG_EOS 0x10
@ -436,20 +442,21 @@ void migrate_compress_threads_create(void)
* @offset: offset inside the block for the page
* in the lower bits, it contains flags
*/
static size_t save_page_header(RAMState *rs, RAMBlock *block, ram_addr_t offset)
static size_t save_page_header(RAMState *rs, QEMUFile *f, RAMBlock *block,
ram_addr_t offset)
{
size_t size, len;
if (block == rs->last_sent_block) {
offset |= RAM_SAVE_FLAG_CONTINUE;
}
qemu_put_be64(rs->f, offset);
qemu_put_be64(f, offset);
size = 8;
if (!(offset & RAM_SAVE_FLAG_CONTINUE)) {
len = strlen(block->idstr);
qemu_put_byte(rs->f, len);
qemu_put_buffer(rs->f, (uint8_t *)block->idstr, len);
qemu_put_byte(f, len);
qemu_put_buffer(f, (uint8_t *)block->idstr, len);
size += 1 + len;
rs->last_sent_block = block;
}
@ -571,7 +578,7 @@ static int save_xbzrle_page(RAMState *rs, uint8_t **current_data,
}
/* Send XBZRLE based compressed page */
bytes_xbzrle = save_page_header(rs, block,
bytes_xbzrle = save_page_header(rs, rs->f, block,
offset | RAM_SAVE_FLAG_XBZRLE);
qemu_put_byte(rs->f, ENCODING_FLAG_XBZRLE);
qemu_put_be16(rs->f, encoded_len);
@ -745,7 +752,7 @@ static int save_zero_page(RAMState *rs, RAMBlock *block, ram_addr_t offset,
if (is_zero_range(p, TARGET_PAGE_SIZE)) {
rs->zero_pages++;
rs->bytes_transferred +=
save_page_header(rs, block, offset | RAM_SAVE_FLAG_COMPRESS);
save_page_header(rs, rs->f, block, offset | RAM_SAVE_FLAG_ZERO);
qemu_put_byte(rs->f, 0);
rs->bytes_transferred += 1;
pages = 1;
@ -834,7 +841,7 @@ static int ram_save_page(RAMState *rs, PageSearchStatus *pss, bool last_stage)
/* XBZRLE overflow or normal page */
if (pages == -1) {
rs->bytes_transferred += save_page_header(rs, block,
rs->bytes_transferred += save_page_header(rs, rs->f, block,
offset | RAM_SAVE_FLAG_PAGE);
if (send_async) {
qemu_put_buffer_async(rs->f, p, TARGET_PAGE_SIZE,
@ -860,7 +867,7 @@ static int do_compress_ram_page(QEMUFile *f, RAMBlock *block,
int bytes_sent, blen;
uint8_t *p = block->host + (offset & TARGET_PAGE_MASK);
bytes_sent = save_page_header(rs, block, offset |
bytes_sent = save_page_header(rs, f, block, offset |
RAM_SAVE_FLAG_COMPRESS_PAGE);
blen = qemu_put_compression_data(f, p, TARGET_PAGE_SIZE,
migrate_compress_level());
@ -991,7 +998,7 @@ static int ram_save_compressed_page(RAMState *rs, PageSearchStatus *pss,
pages = save_zero_page(rs, block, offset, p);
if (pages == -1) {
/* Make sure the first page is sent out before other pages */
bytes_xmit = save_page_header(rs, block, offset |
bytes_xmit = save_page_header(rs, rs->f, block, offset |
RAM_SAVE_FLAG_COMPRESS_PAGE);
blen = qemu_put_compression_data(rs->f, p, TARGET_PAGE_SIZE,
migrate_compress_level());
@ -2405,7 +2412,7 @@ static int ram_load_postcopy(QEMUFile *f)
trace_ram_load_postcopy_loop((uint64_t)addr, flags);
place_needed = false;
if (flags & (RAM_SAVE_FLAG_COMPRESS | RAM_SAVE_FLAG_PAGE)) {
if (flags & (RAM_SAVE_FLAG_ZERO | RAM_SAVE_FLAG_PAGE)) {
block = ram_block_from_stream(f, flags);
host = host_from_ram_block_offset(block, addr);
@ -2452,7 +2459,7 @@ static int ram_load_postcopy(QEMUFile *f)
last_host = host;
switch (flags & ~RAM_SAVE_FLAG_CONTINUE) {
case RAM_SAVE_FLAG_COMPRESS:
case RAM_SAVE_FLAG_ZERO:
ch = qemu_get_byte(f);
memset(page_buffer, ch, TARGET_PAGE_SIZE);
if (ch) {
@ -2541,7 +2548,7 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id)
flags = addr & ~TARGET_PAGE_MASK;
addr &= TARGET_PAGE_MASK;
if (flags & (RAM_SAVE_FLAG_COMPRESS | RAM_SAVE_FLAG_PAGE |
if (flags & (RAM_SAVE_FLAG_ZERO | RAM_SAVE_FLAG_PAGE |
RAM_SAVE_FLAG_COMPRESS_PAGE | RAM_SAVE_FLAG_XBZRLE)) {
RAMBlock *block = ram_block_from_stream(f, flags);
@ -2603,7 +2610,7 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id)
}
break;
case RAM_SAVE_FLAG_COMPRESS:
case RAM_SAVE_FLAG_ZERO:
ch = qemu_get_byte(f);
ram_handle_compressed(host, ch, TARGET_PAGE_SIZE);
break;

61
migration/savevm.c
View File

@ -2069,7 +2069,7 @@ int qemu_loadvm_state(QEMUFile *f)
return ret;
}
int save_vmstate(const char *name)
int save_vmstate(const char *name, Error **errp)
{
BlockDriverState *bs, *bs1;
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
@ -2079,29 +2079,27 @@ int save_vmstate(const char *name)
uint64_t vm_state_size;
qemu_timeval tv;
struct tm tm;
Error *local_err = NULL;
AioContext *aio_context;
if (!bdrv_all_can_snapshot(&bs)) {
error_report("Device '%s' is writable but does not support snapshots",
bdrv_get_device_name(bs));
error_setg(errp, "Device '%s' is writable but does not support "
"snapshots", bdrv_get_device_name(bs));
return ret;
}
/* Delete old snapshots of the same name */
if (name) {
ret = bdrv_all_delete_snapshot(name, &bs1, &local_err);
ret = bdrv_all_delete_snapshot(name, &bs1, errp);
if (ret < 0) {
error_reportf_err(local_err,
"Error while deleting snapshot on device '%s': ",
bdrv_get_device_name(bs1));
error_prepend(errp, "Error while deleting snapshot on device "
"'%s': ", bdrv_get_device_name(bs1));
return ret;
}
}
bs = bdrv_all_find_vmstate_bs();
if (bs == NULL) {
error_report("No block device can accept snapshots");
error_setg(errp, "No block device can accept snapshots");
return ret;
}
aio_context = bdrv_get_aio_context(bs);
@ -2110,7 +2108,7 @@ int save_vmstate(const char *name)
ret = global_state_store();
if (ret) {
error_report("Error saving global state");
error_setg(errp, "Error saving global state");
return ret;
}
vm_stop(RUN_STATE_SAVE_VM);
@ -2142,21 +2140,20 @@ int save_vmstate(const char *name)
/* save the VM state */
f = qemu_fopen_bdrv(bs, 1);
if (!f) {
error_report("Could not open VM state file");
error_setg(errp, "Could not open VM state file");
goto the_end;
}
ret = qemu_savevm_state(f, &local_err);
ret = qemu_savevm_state(f, errp);
vm_state_size = qemu_ftell(f);
qemu_fclose(f);
if (ret < 0) {
error_report_err(local_err);
goto the_end;
}
ret = bdrv_all_create_snapshot(sn, bs, vm_state_size, &bs);
if (ret < 0) {
error_report("Error while creating snapshot on '%s'",
bdrv_get_device_name(bs));
error_setg(errp, "Error while creating snapshot on '%s'",
bdrv_get_device_name(bs));
goto the_end;
}
@ -2229,7 +2226,7 @@ void qmp_xen_load_devices_state(const char *filename, Error **errp)
migration_incoming_state_destroy();
}
int load_vmstate(const char *name)
int load_vmstate(const char *name, Error **errp)
{
BlockDriverState *bs, *bs_vm_state;
QEMUSnapshotInfo sn;
@ -2239,20 +2236,22 @@ int load_vmstate(const char *name)
MigrationIncomingState *mis = migration_incoming_get_current();
if (!bdrv_all_can_snapshot(&bs)) {
error_report("Device '%s' is writable but does not support snapshots",
bdrv_get_device_name(bs));
error_setg(errp,
"Device '%s' is writable but does not support snapshots",
bdrv_get_device_name(bs));
return -ENOTSUP;
}
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);
error_setg(errp,
"Device '%s' does not have the requested snapshot '%s'",
bdrv_get_device_name(bs), name);
return ret;
}
bs_vm_state = bdrv_all_find_vmstate_bs();
if (!bs_vm_state) {
error_report("No block device supports snapshots");
error_setg(errp, "No block device supports snapshots");
return -ENOTSUP;
}
aio_context = bdrv_get_aio_context(bs_vm_state);
@ -2264,8 +2263,8 @@ int load_vmstate(const char *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.");
error_setg(errp, "This is a disk-only snapshot. Revert to it "
" offline using qemu-img");
return -EINVAL;
}
@ -2274,7 +2273,7 @@ int load_vmstate(const char *name)
ret = bdrv_all_goto_snapshot(name, &bs);
if (ret < 0) {
error_report("Error %d while activating snapshot '%s' on '%s'",
error_setg(errp, "Error %d while activating snapshot '%s' on '%s'",
ret, name, bdrv_get_device_name(bs));
return ret;
}
@ -2282,7 +2281,7 @@ int load_vmstate(const char *name)
/* restore the VM state */
f = qemu_fopen_bdrv(bs_vm_state, 0);
if (!f) {
error_report("Could not open VM state file");
error_setg(errp, "Could not open VM state file");
return -EINVAL;
}
@ -2296,7 +2295,7 @@ int load_vmstate(const char *name)
migration_incoming_state_destroy();
if (ret < 0) {
error_report("Error %d while loading VM state", ret);
error_setg(errp, "Error %d while loading VM state", ret);
return ret;
}
@ -2318,3 +2317,13 @@ void vmstate_register_ram_global(MemoryRegion *mr)
{
vmstate_register_ram(mr, NULL);
}
bool vmstate_check_only_migratable(const VMStateDescription *vmsd)
{
/* check needed if --only-migratable is specified */
if (!only_migratable) {
return true;
}
return !(vmsd && vmsd->unmigratable);
}

8
replay/replay-snapshot.c
View File

@ -62,14 +62,18 @@ void replay_vmstate_register(void)
void replay_vmstate_init(void)
{
Error *err = NULL;
if (replay_snapshot) {
if (replay_mode == REPLAY_MODE_RECORD) {
if (save_vmstate(replay_snapshot) != 0) {
if (save_vmstate(replay_snapshot, &err) != 0) {
error_report_err(err);
error_report("Could not create snapshot for icount record");
exit(1);
}
} else if (replay_mode == REPLAY_MODE_PLAY) {
if (load_vmstate(replay_snapshot) != 0) {
if (load_vmstate(replay_snapshot, &err) != 0) {
error_report_err(err);
error_report("Could not load snapshot for icount replay");
exit(1);
}

2
stubs/migr-blocker.c
View File

@ -1,6 +1,6 @@
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "migration/migration.h"
#include "migration/blocker.h"
int migrate_add_blocker(Error *reason, Error **errp)
{

5
stubs/vmstate.c
View File

@ -1,7 +1,6 @@
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "migration/vmstate.h"
#include "migration/migration.h"
const VMStateDescription vmstate_dummy = {};
@ -21,7 +20,7 @@ void vmstate_unregister(DeviceState *dev,
{
}
int check_migratable(Object *obj, Error **err)
bool vmstate_check_only_migratable(const VMStateDescription *vmsd)
{
return 0;
return true;
}

2
target/i386/kvm.c
View File

@ -43,7 +43,7 @@
#include "standard-headers/asm-x86/hyperv.h"
#include "hw/pci/pci.h"
#include "hw/pci/msi.h"
#include "migration/migration.h"
#include "migration/blocker.h"
#include "exec/memattrs.h"
#include "trace.h"

2
tests/Makefile.include
View File

@ -554,7 +554,7 @@ tests/test-thread-pool$(EXESUF): tests/test-thread-pool.o $(test-block-obj-y)
tests/test-iov$(EXESUF): tests/test-iov.o $(test-util-obj-y)
tests/test-hbitmap$(EXESUF): tests/test-hbitmap.o $(test-util-obj-y)
tests/test-x86-cpuid$(EXESUF): tests/test-x86-cpuid.o
tests/test-xbzrle$(EXESUF): tests/test-xbzrle.o migration/xbzrle.o page_cache.o $(test-util-obj-y)
tests/test-xbzrle$(EXESUF): tests/test-xbzrle.o migration/xbzrle.o migration/page_cache.o $(test-util-obj-y)
tests/test-cutils$(EXESUF): tests/test-cutils.o util/cutils.o
tests/test-int128$(EXESUF): tests/test-int128.o
tests/rcutorture$(EXESUF): tests/rcutorture.o $(test-util-obj-y)

4
vl.c
View File

@ -4701,7 +4701,9 @@ int main(int argc, char **argv, char **envp)
if (replay_mode != REPLAY_MODE_NONE) {
replay_vmstate_init();
} else if (loadvm) {
if (load_vmstate(loadvm) < 0) {
Error *local_err = NULL;
if (load_vmstate(loadvm, &local_err) < 0) {
error_report_err(local_err);
autostart = 0;
}
}