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Migation pull 2019-03-06 

(This replaces the pull sent yesterday)
 
    a) 4 small fixes including the cancel problem
      that caused the ahci migration test to fail
      intermittently
    b) Yury's ignore-shared feature
    c) Juan's extra tests
    d) Wei Wang's free page hinting
    e) Some Colo fixes from Zhang Chen
 
 Diff from yesterdays pull:
   1) A missing fix of mine (cleanup during exit)
   2) Changes from Eric/Markus on 'Create socket-address parameter'
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Merge remote-tracking branch 'remotes/dgilbert/tags/pull-migration-20190306a' into staging

Migation pull 2019-03-06

(This replaces the pull sent yesterday)

   a) 4 small fixes including the cancel problem
     that caused the ahci migration test to fail
     intermittently
   b) Yury's ignore-shared feature
   c) Juan's extra tests
   d) Wei Wang's free page hinting
   e) Some Colo fixes from Zhang Chen

Diff from yesterdays pull:
  1) A missing fix of mine (cleanup during exit)
  2) Changes from Eric/Markus on 'Create socket-address parameter'

# gpg: Signature made Wed 06 Mar 2019 11:39:53 GMT
# gpg:                using RSA key 0516331EBC5BFDE7
# gpg: Good signature from "Dr. David Alan Gilbert (RH2) <dgilbert@redhat.com>" [full]
# Primary key fingerprint: 45F5 C71B 4A0C B7FB 977A  9FA9 0516 331E BC5B FDE7

* remotes/dgilbert/tags/pull-migration-20190306a: (22 commits)
  qapi/migration.json: Remove a variable that doesn't exist in example
  Migration/colo.c: Make COLO node running after failover
  Migration/colo.c: Fix double close bug when occur COLO failover
  virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT
  migration/ram.c: add the free page optimization enable flag
  migration/ram.c: add a notifier chain for precopy
  migration: API to clear bits of guest free pages from the dirty bitmap
  migration: use bitmap_mutex in migration_bitmap_clear_dirty
  bitmap: bitmap_count_one_with_offset
  bitmap: fix bitmap_count_one
  tests: Add basic migration precopy tcp test
  migration: Create socket-address parameter
  tests: Add migration xbzrle test
  migration: Add capabilities validation
  tests/migration-test: Add a test for ignore-shared capability
  migration: Add an ability to ignore shared RAM blocks
  migration: Introduce ignore-shared capability
  exec: Change RAMBlockIterFunc definition
  migration/rdma: clang compilation fix
  migration: Cleanup during exit
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2019-03-06 14:50:33 +00:00
parent 9b748c5e06 b5922fc589
commit c557a8c7b7
20 changed files with 1167 additions and 126 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
exec.c
View File

@ -1972,6 +1972,21 @@ const char *qemu_ram_get_idstr(RAMBlock *rb)
return rb->idstr;
}
void *qemu_ram_get_host_addr(RAMBlock *rb)
{
return rb->host;
}
ram_addr_t qemu_ram_get_offset(RAMBlock *rb)
{
return rb->offset;
}
ram_addr_t qemu_ram_get_used_length(RAMBlock *rb)
{
return rb->used_length;
}
bool qemu_ram_is_shared(RAMBlock *rb)
{
return rb->flags & RAM_SHARED;
@ -3961,28 +3976,7 @@ int qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque)
rcu_read_lock();
RAMBLOCK_FOREACH(block) {
ret = func(block->idstr, block->host, block->offset,
block->used_length, opaque);
if (ret) {
break;
}
}
rcu_read_unlock();
return ret;
}
int qemu_ram_foreach_migratable_block(RAMBlockIterFunc func, void *opaque)
{
RAMBlock *block;
int ret = 0;
rcu_read_lock();
RAMBLOCK_FOREACH(block) {
if (!qemu_ram_is_migratable(block)) {
continue;
}
ret = func(block->idstr, block->host, block->offset,
block->used_length, opaque);
ret = func(block, opaque);
if (ret) {
break;
}

33
hmp.c
View File

@ -166,6 +166,27 @@ void hmp_info_mice(Monitor *mon, const QDict *qdict)
qapi_free_MouseInfoList(mice_list);
}
static char *SocketAddress_to_str(SocketAddress *addr)
{
switch (addr->type) {
case SOCKET_ADDRESS_TYPE_INET:
return g_strdup_printf("tcp:%s:%s",
addr->u.inet.host,
addr->u.inet.port);
case SOCKET_ADDRESS_TYPE_UNIX:
return g_strdup_printf("unix:%s",
addr->u.q_unix.path);
case SOCKET_ADDRESS_TYPE_FD:
return g_strdup_printf("fd:%s", addr->u.fd.str);
case SOCKET_ADDRESS_TYPE_VSOCK:
return g_strdup_printf("tcp:%s:%s",
addr->u.vsock.cid,
addr->u.vsock.port);
default:
return g_strdup("unknown address type");
}
}
void hmp_info_migrate(Monitor *mon, const QDict *qdict)
{
MigrationInfo *info;
@ -306,6 +327,18 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict)
g_free(str);
visit_free(v);
}
if (info->has_socket_address) {
SocketAddressList *addr;
monitor_printf(mon, "socket address: [\n");
for (addr = info->socket_address; addr; addr = addr->next) {
char *s = SocketAddress_to_str(addr->value);
monitor_printf(mon, "\t%s\n", s);
g_free(s);
}
monitor_printf(mon, "]\n");
}
qapi_free_MigrationInfo(info);
qapi_free_MigrationCapabilityStatusList(caps);
}

263
hw/virtio/virtio-balloon.c
View File

@ -27,6 +27,7 @@
#include "qapi/visitor.h"
#include "trace.h"
#include "qemu/error-report.h"
#include "migration/misc.h"
#include "hw/virtio/virtio-bus.h"
#include "hw/virtio/virtio-access.h"
@ -378,6 +379,184 @@ out:
}
}
static void virtio_balloon_handle_free_page_vq(VirtIODevice *vdev,
VirtQueue *vq)
{
VirtIOBalloon *s = VIRTIO_BALLOON(vdev);
qemu_bh_schedule(s->free_page_bh);
}
static bool get_free_page_hints(VirtIOBalloon *dev)
{
VirtQueueElement *elem;
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtQueue *vq = dev->free_page_vq;
while (dev->block_iothread) {
qemu_cond_wait(&dev->free_page_cond, &dev->free_page_lock);
}
elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
if (!elem) {
return false;
}
if (elem->out_num) {
uint32_t id;
size_t size = iov_to_buf(elem->out_sg, elem->out_num, 0,
&id, sizeof(id));
virtqueue_push(vq, elem, size);
g_free(elem);
virtio_tswap32s(vdev, &id);
if (unlikely(size != sizeof(id))) {
virtio_error(vdev, "received an incorrect cmd id");
return false;
}
if (id == dev->free_page_report_cmd_id) {
dev->free_page_report_status = FREE_PAGE_REPORT_S_START;
} else {
/*
* Stop the optimization only when it has started. This
* avoids a stale stop sign for the previous command.
*/
if (dev->free_page_report_status == FREE_PAGE_REPORT_S_START) {
dev->free_page_report_status = FREE_PAGE_REPORT_S_STOP;
}
}
}
if (elem->in_num) {
if (dev->free_page_report_status == FREE_PAGE_REPORT_S_START) {
qemu_guest_free_page_hint(elem->in_sg[0].iov_base,
elem->in_sg[0].iov_len);
}
virtqueue_push(vq, elem, 1);
g_free(elem);
}
return true;
}
static void virtio_ballloon_get_free_page_hints(void *opaque)
{
VirtIOBalloon *dev = opaque;
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtQueue *vq = dev->free_page_vq;
bool continue_to_get_hints;
do {
qemu_mutex_lock(&dev->free_page_lock);
virtio_queue_set_notification(vq, 0);
continue_to_get_hints = get_free_page_hints(dev);
qemu_mutex_unlock(&dev->free_page_lock);
virtio_notify(vdev, vq);
/*
* Start to poll the vq once the reporting started. Otherwise, continue
* only when there are entries on the vq, which need to be given back.
*/
} while (continue_to_get_hints ||
dev->free_page_report_status == FREE_PAGE_REPORT_S_START);
virtio_queue_set_notification(vq, 1);
}
static bool virtio_balloon_free_page_support(void *opaque)
{
VirtIOBalloon *s = opaque;
VirtIODevice *vdev = VIRTIO_DEVICE(s);
return virtio_vdev_has_feature(vdev, VIRTIO_BALLOON_F_FREE_PAGE_HINT);
}
static void virtio_balloon_free_page_start(VirtIOBalloon *s)
{
VirtIODevice *vdev = VIRTIO_DEVICE(s);
/* For the stop and copy phase, we don't need to start the optimization */
if (!vdev->vm_running) {
return;
}
if (s->free_page_report_cmd_id == UINT_MAX) {
s->free_page_report_cmd_id =
VIRTIO_BALLOON_FREE_PAGE_REPORT_CMD_ID_MIN;
} else {
s->free_page_report_cmd_id++;
}
s->free_page_report_status = FREE_PAGE_REPORT_S_REQUESTED;
virtio_notify_config(vdev);
}
static void virtio_balloon_free_page_stop(VirtIOBalloon *s)
{
VirtIODevice *vdev = VIRTIO_DEVICE(s);
if (s->free_page_report_status != FREE_PAGE_REPORT_S_STOP) {
/*
* The lock also guarantees us that the
* virtio_ballloon_get_free_page_hints exits after the
* free_page_report_status is set to S_STOP.
*/
qemu_mutex_lock(&s->free_page_lock);
/*
* The guest hasn't done the reporting, so host sends a notification
* to the guest to actively stop the reporting.
*/
s->free_page_report_status = FREE_PAGE_REPORT_S_STOP;
qemu_mutex_unlock(&s->free_page_lock);
virtio_notify_config(vdev);
}
}
static void virtio_balloon_free_page_done(VirtIOBalloon *s)
{
VirtIODevice *vdev = VIRTIO_DEVICE(s);
s->free_page_report_status = FREE_PAGE_REPORT_S_DONE;
virtio_notify_config(vdev);
}
static int
virtio_balloon_free_page_report_notify(NotifierWithReturn *n, void *data)
{
VirtIOBalloon *dev = container_of(n, VirtIOBalloon,
free_page_report_notify);
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
PrecopyNotifyData *pnd = data;
if (!virtio_balloon_free_page_support(dev)) {
/*
* This is an optimization provided to migration, so just return 0 to
* have the normal migration process not affected when this feature is
* not supported.
*/
return 0;
}
switch (pnd->reason) {
case PRECOPY_NOTIFY_SETUP:
precopy_enable_free_page_optimization();
break;
case PRECOPY_NOTIFY_COMPLETE:
case PRECOPY_NOTIFY_CLEANUP:
case PRECOPY_NOTIFY_BEFORE_BITMAP_SYNC:
virtio_balloon_free_page_stop(dev);
break;
case PRECOPY_NOTIFY_AFTER_BITMAP_SYNC:
if (vdev->vm_running) {
virtio_balloon_free_page_start(dev);
} else {
virtio_balloon_free_page_done(dev);
}
break;
default:
virtio_error(vdev, "%s: %d reason unknown", __func__, pnd->reason);
}
return 0;
}
static void virtio_balloon_get_config(VirtIODevice *vdev, uint8_t *config_data)
{
VirtIOBalloon *dev = VIRTIO_BALLOON(vdev);
@ -386,6 +565,17 @@ static void virtio_balloon_get_config(VirtIODevice *vdev, uint8_t *config_data)
config.num_pages = cpu_to_le32(dev->num_pages);
config.actual = cpu_to_le32(dev->actual);
if (dev->free_page_report_status == FREE_PAGE_REPORT_S_REQUESTED) {
config.free_page_report_cmd_id =
cpu_to_le32(dev->free_page_report_cmd_id);
} else if (dev->free_page_report_status == FREE_PAGE_REPORT_S_STOP) {
config.free_page_report_cmd_id =
cpu_to_le32(VIRTIO_BALLOON_CMD_ID_STOP);
} else if (dev->free_page_report_status == FREE_PAGE_REPORT_S_DONE) {
config.free_page_report_cmd_id =
cpu_to_le32(VIRTIO_BALLOON_CMD_ID_DONE);
}
trace_virtio_balloon_get_config(config.num_pages, config.actual);
memcpy(config_data, &config, sizeof(struct virtio_balloon_config));
}
@ -446,6 +636,7 @@ static uint64_t virtio_balloon_get_features(VirtIODevice *vdev, uint64_t f,
VirtIOBalloon *dev = VIRTIO_BALLOON(vdev);
f |= dev->host_features;
virtio_add_feature(&f, VIRTIO_BALLOON_F_STATS_VQ);
return f;
}
@ -482,6 +673,18 @@ static int virtio_balloon_post_load_device(void *opaque, int version_id)
return 0;
}
static const VMStateDescription vmstate_virtio_balloon_free_page_report = {
.name = "virtio-balloon-device/free-page-report",
.version_id = 1,
.minimum_version_id = 1,
.needed = virtio_balloon_free_page_support,
.fields = (VMStateField[]) {
VMSTATE_UINT32(free_page_report_cmd_id, VirtIOBalloon),
VMSTATE_UINT32(free_page_report_status, VirtIOBalloon),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_virtio_balloon_device = {
.name = "virtio-balloon-device",
.version_id = 1,
@ -492,6 +695,10 @@ static const VMStateDescription vmstate_virtio_balloon_device = {
VMSTATE_UINT32(actual, VirtIOBalloon),
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription * []) {
&vmstate_virtio_balloon_free_page_report,
NULL
}
};
static void virtio_balloon_device_realize(DeviceState *dev, Error **errp)
@ -516,6 +723,29 @@ static void virtio_balloon_device_realize(DeviceState *dev, Error **errp)
s->dvq = virtio_add_queue(vdev, 128, virtio_balloon_handle_output);
s->svq = virtio_add_queue(vdev, 128, virtio_balloon_receive_stats);
if (virtio_has_feature(s->host_features,
VIRTIO_BALLOON_F_FREE_PAGE_HINT)) {
s->free_page_vq = virtio_add_queue(vdev, VIRTQUEUE_MAX_SIZE,
virtio_balloon_handle_free_page_vq);
s->free_page_report_status = FREE_PAGE_REPORT_S_STOP;
s->free_page_report_cmd_id =
VIRTIO_BALLOON_FREE_PAGE_REPORT_CMD_ID_MIN;
s->free_page_report_notify.notify =
virtio_balloon_free_page_report_notify;
precopy_add_notifier(&s->free_page_report_notify);
if (s->iothread) {
object_ref(OBJECT(s->iothread));
s->free_page_bh = aio_bh_new(iothread_get_aio_context(s->iothread),
virtio_ballloon_get_free_page_hints, s);
qemu_mutex_init(&s->free_page_lock);
qemu_cond_init(&s->free_page_cond);
s->block_iothread = false;
} else {
/* Simply disable this feature if the iothread wasn't created. */
s->host_features &= ~(1 << VIRTIO_BALLOON_F_FREE_PAGE_HINT);
virtio_error(vdev, "iothread is missing");
}
}
reset_stats(s);
}
@ -524,6 +754,11 @@ static void virtio_balloon_device_unrealize(DeviceState *dev, Error **errp)
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtIOBalloon *s = VIRTIO_BALLOON(dev);
if (virtio_balloon_free_page_support(s)) {
qemu_bh_delete(s->free_page_bh);
virtio_balloon_free_page_stop(s);
precopy_remove_notifier(&s->free_page_report_notify);
}
balloon_stats_destroy_timer(s);
qemu_remove_balloon_handler(s);
virtio_cleanup(vdev);
@ -533,6 +768,10 @@ static void virtio_balloon_device_reset(VirtIODevice *vdev)
{
VirtIOBalloon *s = VIRTIO_BALLOON(vdev);
if (virtio_balloon_free_page_support(s)) {
virtio_balloon_free_page_stop(s);
}
if (s->stats_vq_elem != NULL) {
virtqueue_unpop(s->svq, s->stats_vq_elem, 0);
g_free(s->stats_vq_elem);
@ -550,6 +789,26 @@ static void virtio_balloon_set_status(VirtIODevice *vdev, uint8_t status)
* was stopped */
virtio_balloon_receive_stats(vdev, s->svq);
}
if (virtio_balloon_free_page_support(s)) {
/*
* The VM is woken up and the iothread was blocked, so signal it to
* continue.
*/
if (vdev->vm_running && s->block_iothread) {
qemu_mutex_lock(&s->free_page_lock);
s->block_iothread = false;
qemu_cond_signal(&s->free_page_cond);
qemu_mutex_unlock(&s->free_page_lock);
}
/* The VM is stopped, block the iothread. */
if (!vdev->vm_running) {
qemu_mutex_lock(&s->free_page_lock);
s->block_iothread = true;
qemu_mutex_unlock(&s->free_page_lock);
}
}
}
static void virtio_balloon_instance_init(Object *obj)
@ -578,6 +837,10 @@ static const VMStateDescription vmstate_virtio_balloon = {
static Property virtio_balloon_properties[] = {
DEFINE_PROP_BIT("deflate-on-oom", VirtIOBalloon, host_features,
VIRTIO_BALLOON_F_DEFLATE_ON_OOM, false),
DEFINE_PROP_BIT("free-page-hint", VirtIOBalloon, host_features,
VIRTIO_BALLOON_F_FREE_PAGE_HINT, false),
DEFINE_PROP_LINK("iothread", VirtIOBalloon, iothread, TYPE_IOTHREAD,
IOThread *),
DEFINE_PROP_END_OF_LIST(),
};

7
include/exec/cpu-common.h
View File

@ -72,6 +72,9 @@ ram_addr_t qemu_ram_block_host_offset(RAMBlock *rb, void *host);
void qemu_ram_set_idstr(RAMBlock *block, const char *name, DeviceState *dev);
void qemu_ram_unset_idstr(RAMBlock *block);
const char *qemu_ram_get_idstr(RAMBlock *rb);
void *qemu_ram_get_host_addr(RAMBlock *rb);
ram_addr_t qemu_ram_get_offset(RAMBlock *rb);
ram_addr_t qemu_ram_get_used_length(RAMBlock *rb);
bool qemu_ram_is_shared(RAMBlock *rb);
bool qemu_ram_is_uf_zeroable(RAMBlock *rb);
void qemu_ram_set_uf_zeroable(RAMBlock *rb);
@ -116,11 +119,9 @@ void cpu_flush_icache_range(hwaddr start, hwaddr len);
extern struct MemoryRegion io_mem_rom;
extern struct MemoryRegion io_mem_notdirty;
typedef int (RAMBlockIterFunc)(const char *block_name, void *host_addr,
ram_addr_t offset, ram_addr_t length, void *opaque);
typedef int (RAMBlockIterFunc)(RAMBlock *rb, void *opaque);
int qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque);
int qemu_ram_foreach_migratable_block(RAMBlockIterFunc func, void *opaque);
int ram_block_discard_range(RAMBlock *rb, uint64_t start, size_t length);
#endif

28
include/hw/virtio/virtio-balloon.h
View File

@ -17,11 +17,14 @@
#include "standard-headers/linux/virtio_balloon.h"
#include "hw/virtio/virtio.h"
#include "sysemu/iothread.h"
#define TYPE_VIRTIO_BALLOON "virtio-balloon-device"
#define VIRTIO_BALLOON(obj) \
OBJECT_CHECK(VirtIOBalloon, (obj), TYPE_VIRTIO_BALLOON)
#define VIRTIO_BALLOON_FREE_PAGE_REPORT_CMD_ID_MIN 0x80000000
typedef struct virtio_balloon_stat VirtIOBalloonStat;
typedef struct virtio_balloon_stat_modern {
@ -32,15 +35,38 @@ typedef struct virtio_balloon_stat_modern {
typedef struct PartiallyBalloonedPage PartiallyBalloonedPage;
enum virtio_balloon_free_page_report_status {
FREE_PAGE_REPORT_S_STOP = 0,
FREE_PAGE_REPORT_S_REQUESTED = 1,
FREE_PAGE_REPORT_S_START = 2,
FREE_PAGE_REPORT_S_DONE = 3,
};
typedef struct VirtIOBalloon {
VirtIODevice parent_obj;
VirtQueue *ivq, *dvq, *svq;
VirtQueue *ivq, *dvq, *svq, *free_page_vq;
uint32_t free_page_report_status;
uint32_t num_pages;
uint32_t actual;
uint32_t free_page_report_cmd_id;
uint64_t stats[VIRTIO_BALLOON_S_NR];
VirtQueueElement *stats_vq_elem;
size_t stats_vq_offset;
QEMUTimer *stats_timer;
IOThread *iothread;
QEMUBH *free_page_bh;
/*
* Lock to synchronize threads to access the free page reporting related
* fields (e.g. free_page_report_status).
*/
QemuMutex free_page_lock;
QemuCond free_page_cond;
/*
* Set to block iothread to continue reading free page hints as the VM is
* stopped.
*/
bool block_iothread;
NotifierWithReturn free_page_report_notify;
int64_t stats_last_update;
int64_t stats_poll_interval;
uint32_t host_features;

24
include/migration/misc.h
View File

@ -14,12 +14,34 @@
#ifndef MIGRATION_MISC_H
#define MIGRATION_MISC_H
#include "exec/cpu-common.h"
#include "qemu/notify.h"
#include "qapi/qapi-types-net.h"
/* migration/ram.c */
typedef enum PrecopyNotifyReason {
PRECOPY_NOTIFY_SETUP = 0,
PRECOPY_NOTIFY_BEFORE_BITMAP_SYNC = 1,
PRECOPY_NOTIFY_AFTER_BITMAP_SYNC = 2,
PRECOPY_NOTIFY_COMPLETE = 3,
PRECOPY_NOTIFY_CLEANUP = 4,
PRECOPY_NOTIFY_MAX = 5,
} PrecopyNotifyReason;
typedef struct PrecopyNotifyData {
enum PrecopyNotifyReason reason;
Error **errp;
} PrecopyNotifyData;
void precopy_infrastructure_init(void);
void precopy_add_notifier(NotifierWithReturn *n);
void precopy_remove_notifier(NotifierWithReturn *n);
int precopy_notify(PrecopyNotifyReason reason, Error **errp);
void precopy_enable_free_page_optimization(void);
void ram_mig_init(void);
void qemu_guest_free_page_hint(void *addr, size_t len);
/* migration/block.c */
@ -36,7 +58,7 @@ void dump_vmstate_json_to_file(FILE *out_fp);
/* migration/migration.c */
void migration_object_init(void);
void migration_object_finalize(void);
void migration_shutdown(void);
void qemu_start_incoming_migration(const char *uri, Error **errp);
bool migration_is_idle(void);
void add_migration_state_change_notifier(Notifier *notify);

17
include/qemu/bitmap.h
View File

@ -221,6 +221,10 @@ static inline int bitmap_intersects(const unsigned long *src1,
static inline long bitmap_count_one(const unsigned long *bitmap, long nbits)
{
if (unlikely(!nbits)) {
return 0;
}
if (small_nbits(nbits)) {
return ctpopl(*bitmap & BITMAP_LAST_WORD_MASK(nbits));
} else {
@ -228,6 +232,19 @@ static inline long bitmap_count_one(const unsigned long *bitmap, long nbits)
}
}
static inline long bitmap_count_one_with_offset(const unsigned long *bitmap,
long offset, long nbits)
{
long aligned_offset = QEMU_ALIGN_DOWN(offset, BITS_PER_LONG);
long redundant_bits = offset - aligned_offset;
long bits_to_count = nbits + redundant_bits;
const unsigned long *bitmap_start = bitmap +
aligned_offset / BITS_PER_LONG;
return bitmap_count_one(bitmap_start, bits_to_count) -
bitmap_count_one(bitmap_start, redundant_bits);
}
void bitmap_set(unsigned long *map, long i, long len);
void bitmap_set_atomic(unsigned long *map, long i, long len);
void bitmap_clear(unsigned long *map, long start, long nr);

2
migration/colo.c
View File

@ -872,8 +872,8 @@ out:
/* Must be called after failover BH is completed */
if (mis->to_src_file) {
qemu_fclose(mis->to_src_file);
mis->to_src_file = NULL;
}
migration_incoming_disable_colo();
rcu_unregister_thread();
return NULL;

62
migration/migration.c
View File

@ -31,6 +31,8 @@
#include "migration/vmstate.h"
#include "block/block.h"
#include "qapi/error.h"
#include "qapi/clone-visitor.h"
#include "qapi/qapi-visit-sockets.h"
#include "qapi/qapi-commands-migration.h"
#include "qapi/qapi-events-migration.h"
#include "qapi/qmp/qerror.h"
@ -126,6 +128,7 @@ static bool migration_object_check(MigrationState *ms, Error **errp);
static int migration_maybe_pause(MigrationState *s,
int *current_active_state,
int new_state);
static void migrate_fd_cancel(MigrationState *s);
void migration_object_init(void)
{
@ -167,8 +170,13 @@ void migration_object_init(void)
}
}
void migration_object_finalize(void)
void migration_shutdown(void)
{
/*
* Cancel the current migration - that will (eventually)
* stop the migration using this structure
*/
migrate_fd_cancel(current_migration);
object_unref(OBJECT(current_migration));
}
@ -207,6 +215,11 @@ void migration_incoming_state_destroy(void)
}
qemu_event_reset(&mis->main_thread_load_event);
if (mis->socket_address_list) {
qapi_free_SocketAddressList(mis->socket_address_list);
mis->socket_address_list = NULL;
}
}
static void migrate_generate_event(int new_state)
@ -322,6 +335,17 @@ void migration_incoming_enable_colo(void)
migration_colo_enabled = true;
}
void migrate_add_address(SocketAddress *address)
{
MigrationIncomingState *mis = migration_incoming_get_current();
SocketAddressList *addrs;
addrs = g_new0(SocketAddressList, 1);
addrs->next = mis->socket_address_list;
mis->socket_address_list = addrs;
addrs->value = QAPI_CLONE(SocketAddress, address);
}
void qemu_start_incoming_migration(const char *uri, Error **errp)
{
const char *p;
@ -393,6 +417,9 @@ static void process_incoming_migration_bh(void *opaque)
} else {
runstate_set(RUN_STATE_PAUSED);
}
} else if (migration_incoming_colo_enabled()) {
migration_incoming_disable_colo();
vm_start();
} else {
runstate_set(global_state_get_runstate());
}
@ -989,6 +1016,11 @@ static bool migrate_caps_check(bool *cap_list,
error_setg(errp, "Postcopy is not supported");
return false;
}
if (cap_list[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) {
error_setg(errp, "Postcopy is not compatible with ignore-shared");
return false;
}
}
return true;
@ -998,6 +1030,12 @@ static void fill_destination_migration_info(MigrationInfo *info)
{
MigrationIncomingState *mis = migration_incoming_get_current();
if (mis->socket_address_list) {
info->has_socket_address = true;
info->socket_address =
QAPI_CLONE(SocketAddressList, mis->socket_address_list);
}
switch (mis->state) {
case MIGRATION_STATUS_NONE:
return;
@ -2068,6 +2106,15 @@ bool migrate_dirty_bitmaps(void)
return s->enabled_capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS];
}
bool migrate_ignore_shared(void)
{
MigrationState *s;
s = migrate_get_current();
return s->enabled_capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED];
}
bool migrate_use_events(void)
{
MigrationState *s;
@ -2911,6 +2958,13 @@ static MigThrError postcopy_pause(MigrationState *s)
static MigThrError migration_detect_error(MigrationState *s)
{
int ret;
int state = s->state;
if (state == MIGRATION_STATUS_CANCELLING ||
state == MIGRATION_STATUS_CANCELLED) {
/* End the migration, but don't set the state to failed */
return MIG_THR_ERR_FATAL;
}
/* Try to detect any file errors */
ret = qemu_file_get_error(s->to_dst_file);
@ -2920,7 +2974,7 @@ static MigThrError migration_detect_error(MigrationState *s)
return MIG_THR_ERR_NONE;
}
if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE && ret == -EIO) {
if (state == MIGRATION_STATUS_POSTCOPY_ACTIVE && ret == -EIO) {
/*
* For postcopy, we allow the network to be down for a
* while. After that, it can be continued by a
@ -2932,7 +2986,7 @@ static MigThrError migration_detect_error(MigrationState *s)
* For precopy (or postcopy with error outside IO), we fail
* with no time.
*/
migrate_set_state(&s->state, s->state, MIGRATION_STATUS_FAILED);
migrate_set_state(&s->state, state, MIGRATION_STATUS_FAILED);
trace_migration_thread_file_err();
/* Time to stop the migration, now. */
@ -3127,6 +3181,7 @@ static void *migration_thread(void *opaque)
rcu_register_thread();
object_ref(OBJECT(s));
s->iteration_start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
qemu_savevm_state_header(s->to_dst_file);
@ -3223,6 +3278,7 @@ static void *migration_thread(void *opaque)
trace_migration_thread_after_loop();
migration_iteration_finish(s);
object_unref(OBJECT(s));
rcu_unregister_thread();
return NULL;
}

9
migration/migration.h
View File

@ -84,6 +84,9 @@ struct MigrationIncomingState {
bool postcopy_recover_triggered;
QemuSemaphore postcopy_pause_sem_dst;
QemuSemaphore postcopy_pause_sem_fault;
/* List of listening socket addresses */
SocketAddressList *socket_address_list;
};
MigrationIncomingState *migration_incoming_get_current(void);
@ -265,6 +268,7 @@ bool migrate_release_ram(void);
bool migrate_postcopy_ram(void);
bool migrate_zero_blocks(void);
bool migrate_dirty_bitmaps(void);
bool migrate_ignore_shared(void);
bool migrate_auto_converge(void);
bool migrate_use_multifd(void);
@ -304,9 +308,12 @@ void migrate_send_rp_resume_ack(MigrationIncomingState *mis, uint32_t value);
void dirty_bitmap_mig_before_vm_start(void);
void init_dirty_bitmap_incoming_migration(void);
void migrate_add_address(SocketAddress *address);
int foreach_not_ignored_block(RAMBlockIterFunc func, void *opaque);
#define qemu_ram_foreach_block \
#warning "Use qemu_ram_foreach_block_migratable in migration code"
#warning "Use foreach_not_ignored_block in migration code"
void migration_make_urgent_request(void);
void migration_consume_urgent_request(void);

48
migration/postcopy-ram.c
View File

@ -319,10 +319,10 @@ static bool ufd_check_and_apply(int ufd, MigrationIncomingState *mis)
/* Callback from postcopy_ram_supported_by_host block iterator.
*/
static int test_ramblock_postcopiable(const char *block_name, void *host_addr,
ram_addr_t offset, ram_addr_t length, void *opaque)
static int test_ramblock_postcopiable(RAMBlock *rb, void *opaque)
{
RAMBlock *rb = qemu_ram_block_by_name(block_name);
const char *block_name = qemu_ram_get_idstr(rb);
ram_addr_t length = qemu_ram_get_used_length(rb);
size_t pagesize = qemu_ram_pagesize(rb);
if (length % pagesize) {
@ -374,7 +374,7 @@ bool postcopy_ram_supported_by_host(MigrationIncomingState *mis)
}
/* We don't support postcopy with shared RAM yet */
if (qemu_ram_foreach_migratable_block(test_ramblock_postcopiable, NULL)) {
if (foreach_not_ignored_block(test_ramblock_postcopiable, NULL)) {
goto out;
}
@ -443,9 +443,12 @@ out:
* must be done right at the start prior to pre-copy.
* opaque should be the MIS.
*/
static int init_range(const char *block_name, void *host_addr,
ram_addr_t offset, ram_addr_t length, void *opaque)
static int init_range(RAMBlock *rb, void *opaque)
{
const char *block_name = qemu_ram_get_idstr(rb);
void *host_addr = qemu_ram_get_host_addr(rb);
ram_addr_t offset = qemu_ram_get_offset(rb);
ram_addr_t length = qemu_ram_get_used_length(rb);
trace_postcopy_init_range(block_name, host_addr, offset, length);
/*
@ -465,9 +468,12 @@ static int init_range(const char *block_name, void *host_addr,
* At the end of migration, undo the effects of init_range
* opaque should be the MIS.
*/
static int cleanup_range(const char *block_name, void *host_addr,
ram_addr_t offset, ram_addr_t length, void *opaque)
static int cleanup_range(RAMBlock *rb, void *opaque)
{
const char *block_name = qemu_ram_get_idstr(rb);
void *host_addr = qemu_ram_get_host_addr(rb);
ram_addr_t offset = qemu_ram_get_offset(rb);
ram_addr_t length = qemu_ram_get_used_length(rb);
MigrationIncomingState *mis = opaque;
struct uffdio_range range_struct;
trace_postcopy_cleanup_range(block_name, host_addr, offset, length);
@ -502,7 +508,7 @@ static int cleanup_range(const char *block_name, void *host_addr,
*/
int postcopy_ram_incoming_init(MigrationIncomingState *mis)
{
if (qemu_ram_foreach_migratable_block(init_range, NULL)) {
if (foreach_not_ignored_block(init_range, NULL)) {
return -1;
}
@ -544,7 +550,7 @@ int postcopy_ram_incoming_cleanup(MigrationIncomingState *mis)
return -1;
}
if (qemu_ram_foreach_migratable_block(cleanup_range, mis)) {
if (foreach_not_ignored_block(cleanup_range, mis)) {
return -1;
}
@ -586,9 +592,12 @@ int postcopy_ram_incoming_cleanup(MigrationIncomingState *mis)
/*
* Disable huge pages on an area
*/
static int nhp_range(const char *block_name, void *host_addr,
ram_addr_t offset, ram_addr_t length, void *opaque)
static int nhp_range(RAMBlock *rb, void *opaque)
{
const char *block_name = qemu_ram_get_idstr(rb);
void *host_addr = qemu_ram_get_host_addr(rb);
ram_addr_t offset = qemu_ram_get_offset(rb);
ram_addr_t length = qemu_ram_get_used_length(rb);
trace_postcopy_nhp_range(block_name, host_addr, offset, length);
/*
@ -608,7 +617,7 @@ static int nhp_range(const char *block_name, void *host_addr,
*/
int postcopy_ram_prepare_discard(MigrationIncomingState *mis)
{
if (qemu_ram_foreach_migratable_block(nhp_range, mis)) {
if (foreach_not_ignored_block(nhp_range, mis)) {
return -1;
}
@ -619,22 +628,20 @@ int postcopy_ram_prepare_discard(MigrationIncomingState *mis)
/*
* Mark the given area of RAM as requiring notification to unwritten areas
* Used as a callback on qemu_ram_foreach_migratable_block.
* Used as a callback on foreach_not_ignored_block.
* host_addr: Base of area to mark
* offset: Offset in the whole ram arena
* length: Length of the section
* opaque: MigrationIncomingState pointer
* Returns 0 on success
*/
static int ram_block_enable_notify(const char *block_name, void *host_addr,
ram_addr_t offset, ram_addr_t length,
void *opaque)
static int ram_block_enable_notify(RAMBlock *rb, void *opaque)
{
MigrationIncomingState *mis = opaque;
struct uffdio_register reg_struct;
reg_struct.range.start = (uintptr_t)host_addr;
reg_struct.range.len = length;
reg_struct.range.start = (uintptr_t)qemu_ram_get_host_addr(rb);
reg_struct.range.len = qemu_ram_get_used_length(rb);
reg_struct.mode = UFFDIO_REGISTER_MODE_MISSING;
/* Now tell our userfault_fd that it's responsible for this area */
@ -647,7 +654,6 @@ static int ram_block_enable_notify(const char *block_name, void *host_addr,
return -1;
}
if (reg_struct.ioctls & ((__u64)1 << _UFFDIO_ZEROPAGE)) {
RAMBlock *rb = qemu_ram_block_by_name(block_name);
qemu_ram_set_uf_zeroable(rb);
}
@ -1116,7 +1122,7 @@ int postcopy_ram_enable_notify(MigrationIncomingState *mis)
mis->have_fault_thread = true;
/* Mark so that we get notified of accesses to unwritten areas */
if (qemu_ram_foreach_migratable_block(ram_block_enable_notify, mis)) {
if (foreach_not_ignored_block(ram_block_enable_notify, mis)) {
error_report("ram_block_enable_notify failed");
return -1;
}

231
migration/ram.c
View File

@ -159,18 +159,44 @@ out:
return ret;
}
static bool ramblock_is_ignored(RAMBlock *block)
{
return !qemu_ram_is_migratable(block) ||
(migrate_ignore_shared() && qemu_ram_is_shared(block));
}
/* Should be holding either ram_list.mutex, or the RCU lock. */
#define RAMBLOCK_FOREACH_NOT_IGNORED(block) \
INTERNAL_RAMBLOCK_FOREACH(block) \
if (ramblock_is_ignored(block)) {} else
#define RAMBLOCK_FOREACH_MIGRATABLE(block) \
INTERNAL_RAMBLOCK_FOREACH(block) \
if (!qemu_ram_is_migratable(block)) {} else
#undef RAMBLOCK_FOREACH
int foreach_not_ignored_block(RAMBlockIterFunc func, void *opaque)
{
RAMBlock *block;
int ret = 0;
rcu_read_lock();
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
ret = func(block, opaque);
if (ret) {
break;
}
}
rcu_read_unlock();
return ret;
}
static void ramblock_recv_map_init(void)
{
RAMBlock *rb;
RAMBLOCK_FOREACH_MIGRATABLE(rb) {
RAMBLOCK_FOREACH_NOT_IGNORED(rb) {
assert(!rb->receivedmap);
rb->receivedmap = bitmap_new(rb->max_length >> qemu_target_page_bits());
}
@ -290,6 +316,8 @@ struct RAMState {
uint32_t last_version;
/* We are in the first round */
bool ram_bulk_stage;
/* The free page optimization is enabled */
bool fpo_enabled;
/* How many times we have dirty too many pages */
int dirty_rate_high_cnt;
/* these variables are used for bitmap sync */
@ -316,7 +344,7 @@ struct RAMState {
uint64_t target_page_count;
/* number of dirty bits in the bitmap */
uint64_t migration_dirty_pages;
/* protects modification of the bitmap */
/* Protects modification of the bitmap and migration dirty pages */
QemuMutex bitmap_mutex;
/* The RAMBlock used in the last src_page_requests */
RAMBlock *last_req_rb;
@ -328,6 +356,41 @@ typedef struct RAMState RAMState;
static RAMState *ram_state;
static NotifierWithReturnList precopy_notifier_list;
void precopy_infrastructure_init(void)
{
notifier_with_return_list_init(&precopy_notifier_list);
}
void precopy_add_notifier(NotifierWithReturn *n)
{
notifier_with_return_list_add(&precopy_notifier_list, n);
}
void precopy_remove_notifier(NotifierWithReturn *n)
{
notifier_with_return_remove(n);
}
int precopy_notify(PrecopyNotifyReason reason, Error **errp)
{
PrecopyNotifyData pnd;
pnd.reason = reason;
pnd.errp = errp;
return notifier_with_return_list_notify(&precopy_notifier_list, &pnd);
}
void precopy_enable_free_page_optimization(void)
{
if (!ram_state) {
return;
}
ram_state->fpo_enabled = true;
}
uint64_t ram_bytes_remaining(void)
{
return ram_state ? (ram_state->migration_dirty_pages * TARGET_PAGE_SIZE) :
@ -1545,11 +1608,15 @@ unsigned long migration_bitmap_find_dirty(RAMState *rs, RAMBlock *rb,
unsigned long *bitmap = rb->bmap;
unsigned long next;
if (!qemu_ram_is_migratable(rb)) {
if (ramblock_is_ignored(rb)) {
return size;
}
if (rs->ram_bulk_stage && start > 0) {
/*
* When the free page optimization is enabled, we need to check the bitmap
* to send the non-free pages rather than all the pages in the bulk stage.
*/
if (!rs->fpo_enabled && rs->ram_bulk_stage && start > 0) {
next = start + 1;
} else {
next = find_next_bit(bitmap, size, start);
@ -1564,11 +1631,14 @@ static inline bool migration_bitmap_clear_dirty(RAMState *rs,
{
bool ret;
qemu_mutex_lock(&rs->bitmap_mutex);
ret = test_and_clear_bit(page, rb->bmap);
if (ret) {
rs->migration_dirty_pages--;
}
qemu_mutex_unlock(&rs->bitmap_mutex);
return ret;
}
@ -1594,7 +1664,7 @@ uint64_t ram_pagesize_summary(void)
RAMBlock *block;
uint64_t summary = 0;
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
summary |= block->page_size;
}
@ -1664,7 +1734,7 @@ static void migration_bitmap_sync(RAMState *rs)
qemu_mutex_lock(&rs->bitmap_mutex);
rcu_read_lock();
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
migration_bitmap_sync_range(rs, block, 0, block->used_length);
}
ram_counters.remaining = ram_bytes_remaining();
@ -1712,6 +1782,25 @@ static void migration_bitmap_sync(RAMState *rs)
}
}
static void migration_bitmap_sync_precopy(RAMState *rs)
{
Error *local_err = NULL;
/*
* The current notifier usage is just an optimization to migration, so we
* don't stop the normal migration process in the error case.
*/
if (precopy_notify(PRECOPY_NOTIFY_BEFORE_BITMAP_SYNC, &local_err)) {
error_report_err(local_err);
}
migration_bitmap_sync(rs);
if (precopy_notify(PRECOPY_NOTIFY_AFTER_BITMAP_SYNC, &local_err)) {
error_report_err(local_err);
}
}
/**
* save_zero_page_to_file: send the zero page to the file
*
@ -2388,7 +2477,7 @@ static int ram_save_host_page(RAMState *rs, PageSearchStatus *pss,
size_t pagesize_bits =
qemu_ram_pagesize(pss->block) >> TARGET_PAGE_BITS;
if (!qemu_ram_is_migratable(pss->block)) {
if (ramblock_is_ignored(pss->block)) {
error_report("block %s should not be migrated !", pss->block->idstr);
return 0;
}
@ -2486,19 +2575,30 @@ void acct_update_position(QEMUFile *f, size_t size, bool zero)
}
}
uint64_t ram_bytes_total(void)
static uint64_t ram_bytes_total_common(bool count_ignored)
{
RAMBlock *block;
uint64_t total = 0;
rcu_read_lock();
RAMBLOCK_FOREACH_MIGRATABLE(block) {
total += block->used_length;
if (count_ignored) {
RAMBLOCK_FOREACH_MIGRATABLE(block) {
total += block->used_length;
}
} else {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
total += block->used_length;
}
}
rcu_read_unlock();
return total;
}
uint64_t ram_bytes_total(void)
{
return ram_bytes_total_common(false);
}
static void xbzrle_load_setup(void)
{
XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
@ -2547,7 +2647,7 @@ static void ram_save_cleanup(void *opaque)
*/
memory_global_dirty_log_stop();
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
g_free(block->bmap);
block->bmap = NULL;
g_free(block->unsentmap);
@ -2566,6 +2666,7 @@ static void ram_state_reset(RAMState *rs)
rs->last_page = 0;
rs->last_version = ram_list.version;
rs->ram_bulk_stage = true;
rs->fpo_enabled = false;
}
#define MAX_WAIT 50 /* ms, half buffered_file limit */
@ -2610,7 +2711,7 @@ void ram_postcopy_migrated_memory_release(MigrationState *ms)
{
struct RAMBlock *block;
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
unsigned long *bitmap = block->bmap;
unsigned long range = block->used_length >> TARGET_PAGE_BITS;
unsigned long run_start = find_next_zero_bit(bitmap, range, 0);
@ -2688,7 +2789,7 @@ static int postcopy_each_ram_send_discard(MigrationState *ms)
struct RAMBlock *block;
int ret;
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
PostcopyDiscardState *pds =
postcopy_discard_send_init(ms, block->idstr);
@ -2896,7 +2997,7 @@ int ram_postcopy_send_discard_bitmap(MigrationState *ms)
rs->last_sent_block = NULL;
rs->last_page = 0;
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
unsigned long pages = block->used_length >> TARGET_PAGE_BITS;
unsigned long *bitmap = block->bmap;
unsigned long *unsentmap = block->unsentmap;
@ -3062,7 +3163,7 @@ static void ram_list_init_bitmaps(void)
/* Skip setting bitmap if there is no RAM */
if (ram_bytes_total()) {
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
pages = block->max_length >> TARGET_PAGE_BITS;
block->bmap = bitmap_new(pages);
bitmap_set(block->bmap, 0, pages);
@ -3083,7 +3184,7 @@ static void ram_init_bitmaps(RAMState *rs)
ram_list_init_bitmaps();
memory_global_dirty_log_start();
migration_bitmap_sync(rs);
migration_bitmap_sync_precopy(rs);
rcu_read_unlock();
qemu_mutex_unlock_ramlist();
@ -3117,7 +3218,7 @@ static void ram_state_resume_prepare(RAMState *rs, QEMUFile *out)
* about dirty page logging as well.
*/
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
pages += bitmap_count_one(block->bmap,
block->used_length >> TARGET_PAGE_BITS);
}
@ -3141,6 +3242,53 @@ static void ram_state_resume_prepare(RAMState *rs, QEMUFile *out)
trace_ram_state_resume_prepare(pages);
}
/*
* This function clears bits of the free pages reported by the caller from the
* migration dirty bitmap. @addr is the host address corresponding to the
* start of the continuous guest free pages, and @len is the total bytes of
* those pages.
*/
void qemu_guest_free_page_hint(void *addr, size_t len)
{
RAMBlock *block;
ram_addr_t offset;
size_t used_len, start, npages;
MigrationState *s = migrate_get_current();
/* This function is currently expected to be used during live migration */
if (!migration_is_setup_or_active(s->state)) {
return;
}
for (; len > 0; len -= used_len, addr += used_len) {
block = qemu_ram_block_from_host(addr, false, &offset);
if (unlikely(!block || offset >= block->used_length)) {
/*
* The implementation might not support RAMBlock resize during
* live migration, but it could happen in theory with future
* updates. So we add a check here to capture that case.
*/
error_report_once("%s unexpected error", __func__);
return;
}
if (len <= block->used_length - offset) {
used_len = len;
} else {
used_len = block->used_length - offset;
}
start = offset >> TARGET_PAGE_BITS;
npages = used_len >> TARGET_PAGE_BITS;
qemu_mutex_lock(&ram_state->bitmap_mutex);
ram_state->migration_dirty_pages -=
bitmap_count_one_with_offset(block->bmap, start, npages);
bitmap_clear(block->bmap, start, npages);
qemu_mutex_unlock(&ram_state->bitmap_mutex);
}
}
/*
* Each of ram_save_setup, ram_save_iterate and ram_save_complete has
* long-running RCU critical section. When rcu-reclaims in the code
@ -3176,7 +3324,7 @@ static int ram_save_setup(QEMUFile *f, void *opaque)
rcu_read_lock();
qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
qemu_put_be64(f, ram_bytes_total_common(true) | RAM_SAVE_FLAG_MEM_SIZE);
RAMBLOCK_FOREACH_MIGRATABLE(block) {
qemu_put_byte(f, strlen(block->idstr));
@ -3185,6 +3333,10 @@ static int ram_save_setup(QEMUFile *f, void *opaque)
if (migrate_postcopy_ram() && block->page_size != qemu_host_page_size) {
qemu_put_be64(f, block->page_size);
}
if (migrate_ignore_shared()) {
qemu_put_be64(f, block->mr->addr);
qemu_put_byte(f, ramblock_is_ignored(block) ? 1 : 0);
}
}
rcu_read_unlock();
@ -3312,7 +3464,7 @@ static int ram_save_complete(QEMUFile *f, void *opaque)
rcu_read_lock();
if (!migration_in_postcopy()) {
migration_bitmap_sync(rs);
migration_bitmap_sync_precopy(rs);
}
ram_control_before_iterate(f, RAM_CONTROL_FINISH);
@ -3361,7 +3513,7 @@ static void ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size,
remaining_size < max_size) {
qemu_mutex_lock_iothread();
rcu_read_lock();
migration_bitmap_sync(rs);
migration_bitmap_sync_precopy(rs);
rcu_read_unlock();
qemu_mutex_unlock_iothread();
remaining_size = rs->migration_dirty_pages * TARGET_PAGE_SIZE;
@ -3443,7 +3595,7 @@ static inline RAMBlock *ram_block_from_stream(QEMUFile *f, int flags)
return NULL;
}
if (!qemu_ram_is_migratable(block)) {
if (ramblock_is_ignored(block)) {
error_report("block %s should not be migrated !", id);
return NULL;
}
@ -3698,7 +3850,7 @@ int colo_init_ram_cache(void)
RAMBlock *block;
rcu_read_lock();
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
block->colo_cache = qemu_anon_ram_alloc(block->used_length,
NULL,
false);
@ -3719,7 +3871,7 @@ int colo_init_ram_cache(void)
if (ram_bytes_total()) {
RAMBlock *block;
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
unsigned long pages = block->max_length >> TARGET_PAGE_BITS;
block->bmap = bitmap_new(pages);
@ -3734,7 +3886,7 @@ int colo_init_ram_cache(void)
out_locked:
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
if (block->colo_cache) {
qemu_anon_ram_free(block->colo_cache, block->used_length);
block->colo_cache = NULL;
@ -3751,14 +3903,14 @@ void colo_release_ram_cache(void)
RAMBlock *block;
memory_global_dirty_log_stop();
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
g_free(block->bmap);
block->bmap = NULL;
}
rcu_read_lock();
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
if (block->colo_cache) {
qemu_anon_ram_free(block->colo_cache, block->used_length);
block->colo_cache = NULL;
@ -3794,7 +3946,7 @@ static int ram_load_cleanup(void *opaque)
{
RAMBlock *rb;
RAMBLOCK_FOREACH_MIGRATABLE(rb) {
RAMBLOCK_FOREACH_NOT_IGNORED(rb) {
if (ramblock_is_pmem(rb)) {
pmem_persist(rb->host, rb->used_length);
}
@ -3803,7 +3955,7 @@ static int ram_load_cleanup(void *opaque)
xbzrle_load_cleanup();
compress_threads_load_cleanup();
RAMBLOCK_FOREACH_MIGRATABLE(rb) {
RAMBLOCK_FOREACH_NOT_IGNORED(rb) {
g_free(rb->receivedmap);
rb->receivedmap = NULL;
}
@ -4003,7 +4155,7 @@ static void colo_flush_ram_cache(void)
memory_global_dirty_log_sync();
rcu_read_lock();
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
migration_bitmap_sync_range(ram_state, block, 0, block->used_length);
}
rcu_read_unlock();
@ -4146,6 +4298,23 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id)
ret = -EINVAL;
}
}
if (migrate_ignore_shared()) {
hwaddr addr = qemu_get_be64(f);
bool ignored = qemu_get_byte(f);
if (ignored != ramblock_is_ignored(block)) {
error_report("RAM block %s should %s be migrated",
id, ignored ? "" : "not");
ret = -EINVAL;
}
if (ramblock_is_ignored(block) &&
block->mr->addr != addr) {
error_report("Mismatched GPAs for block %s "
"%" PRId64 "!= %" PRId64,
id, (uint64_t)addr,
(uint64_t)block->mr->addr);
ret = -EINVAL;
}
}
ram_control_load_hook(f, RAM_CONTROL_BLOCK_REG,
block->idstr);
} else {
@ -4216,7 +4385,7 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id)
static bool ram_has_postcopy(void *opaque)
{
RAMBlock *rb;
RAMBLOCK_FOREACH_MIGRATABLE(rb) {
RAMBLOCK_FOREACH_NOT_IGNORED(rb) {
if (ramblock_is_pmem(rb)) {
info_report("Block: %s, host: %p is a nvdimm memory, postcopy"
"is not supported now!", rb->idstr, rb->host);
@ -4236,7 +4405,7 @@ static int ram_dirty_bitmap_sync_all(MigrationState *s, RAMState *rs)
trace_ram_dirty_bitmap_sync_start();
RAMBLOCK_FOREACH_MIGRATABLE(block) {
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
qemu_savevm_send_recv_bitmap(file, block->idstr);
trace_ram_dirty_bitmap_request(block->idstr);
ramblock_count++;

18
migration/rdma.c
View File

@ -624,9 +624,12 @@ static int rdma_add_block(RDMAContext *rdma, const char *block_name,
* in advanced before the migration starts. This tells us where the RAM blocks
* are so that we can register them individually.
*/
static int qemu_rdma_init_one_block(const char *block_name, void *host_addr,
ram_addr_t block_offset, ram_addr_t length, void *opaque)
static int qemu_rdma_init_one_block(RAMBlock *rb, void *opaque)
{
const char *block_name = qemu_ram_get_idstr(rb);
void *host_addr = qemu_ram_get_host_addr(rb);
ram_addr_t block_offset = qemu_ram_get_offset(rb);
ram_addr_t length = qemu_ram_get_used_length(rb);
return rdma_add_block(opaque, block_name, host_addr, block_offset, length);
}
@ -641,7 +644,7 @@ static int qemu_rdma_init_ram_blocks(RDMAContext *rdma)
assert(rdma->blockmap == NULL);
memset(local, 0, sizeof *local);
qemu_ram_foreach_migratable_block(qemu_rdma_init_one_block, rdma);
foreach_not_ignored_block(qemu_rdma_init_one_block, rdma);
trace_qemu_rdma_init_ram_blocks(local->nb_blocks);
rdma->dest_blocks = g_new0(RDMADestBlock,
rdma->local_ram_blocks.nb_blocks);
@ -2321,7 +2324,9 @@ static void qemu_rdma_cleanup(RDMAContext *rdma)
rdma->connected = false;
}
qemu_set_fd_handler(rdma->channel->fd, NULL, NULL, NULL);
if (rdma->channel) {
qemu_set_fd_handler(rdma->channel->fd, NULL, NULL, NULL);
}
g_free(rdma->dest_blocks);
rdma->dest_blocks = NULL;
@ -3611,13 +3616,16 @@ static int qemu_rdma_registration_handle(QEMUFile *f, void *opaque)
}
chunk_start = ram_chunk_start(block, chunk);
chunk_end = ram_chunk_end(block, chunk + reg->chunks);
/* avoid "-Waddress-of-packed-member" warning */
uint32_t tmp_rkey = 0;
if (qemu_rdma_register_and_get_keys(rdma, block,
(uintptr_t)host_addr, NULL, &reg_result->rkey,
(uintptr_t)host_addr, NULL, &tmp_rkey,
chunk, chunk_start, chunk_end)) {
error_report("cannot get rkey");
ret = -EINVAL;
goto out;
}
reg_result->rkey = tmp_rkey;
reg_result->host_addr = (uintptr_t)block->local_host_addr;

152
migration/savevm.c
View File

@ -57,6 +57,7 @@
#include "sysemu/replay.h"
#include "qjson.h"
#include "migration/colo.h"
#include "qemu/bitmap.h"
#include "net/announce.h"
const unsigned int postcopy_ram_discard_version = 0;
@ -249,6 +250,8 @@ typedef struct SaveState {
uint32_t len;
const char *name;
uint32_t target_page_bits;
uint32_t caps_count;
MigrationCapability *capabilities;
} SaveState;
static SaveState savevm_state = {
@ -256,15 +259,51 @@ static SaveState savevm_state = {
.global_section_id = 0,
};
static bool should_validate_capability(int capability)
{
assert(capability >= 0 && capability < MIGRATION_CAPABILITY__MAX);
/* Validate only new capabilities to keep compatibility. */
switch (capability) {
case MIGRATION_CAPABILITY_X_IGNORE_SHARED:
return true;
default:
return false;
}
}
static uint32_t get_validatable_capabilities_count(void)
{
MigrationState *s = migrate_get_current();
uint32_t result = 0;
int i;
for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) {
if (should_validate_capability(i) && s->enabled_capabilities[i]) {
result++;
}
}
return result;
}
static int configuration_pre_save(void *opaque)
{
SaveState *state = opaque;
const char *current_name = MACHINE_GET_CLASS(current_machine)->name;
MigrationState *s = migrate_get_current();
int i, j;
state->len = strlen(current_name);
state->name = current_name;
state->target_page_bits = qemu_target_page_bits();
state->caps_count = get_validatable_capabilities_count();
state->capabilities = g_renew(MigrationCapability, state->capabilities,
state->caps_count);
for (i = j = 0; i < MIGRATION_CAPABILITY__MAX; i++) {
if (should_validate_capability(i) && s->enabled_capabilities[i]) {
state->capabilities[j++] = i;
}
}
return 0;
}
@ -280,6 +319,40 @@ static int configuration_pre_load(void *opaque)
return 0;
}
static bool configuration_validate_capabilities(SaveState *state)
{
bool ret = true;
MigrationState *s = migrate_get_current();
unsigned long *source_caps_bm;
int i;
source_caps_bm = bitmap_new(MIGRATION_CAPABILITY__MAX);
for (i = 0; i < state->caps_count; i++) {
MigrationCapability capability = state->capabilities[i];
set_bit(capability, source_caps_bm);
}
for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) {
bool source_state, target_state;
if (!should_validate_capability(i)) {
continue;
}
source_state = test_bit(i, source_caps_bm);
target_state = s->enabled_capabilities[i];
if (source_state != target_state) {
error_report("Capability %s is %s, but received capability is %s",
MigrationCapability_str(i),
target_state ? "on" : "off",
source_state ? "on" : "off");
ret = false;
/* Don't break here to report all failed capabilities */
}
}
g_free(source_caps_bm);
return ret;
}
static int configuration_post_load(void *opaque, int version_id)
{
SaveState *state = opaque;
@ -297,9 +370,53 @@ static int configuration_post_load(void *opaque, int version_id)
return -EINVAL;
}
if (!configuration_validate_capabilities(state)) {
return -EINVAL;
}
return 0;
}
static int get_capability(QEMUFile *f, void *pv, size_t size,
const VMStateField *field)
{
MigrationCapability *capability = pv;
char capability_str[UINT8_MAX + 1];
uint8_t len;
int i;
len = qemu_get_byte(f);
qemu_get_buffer(f, (uint8_t *)capability_str, len);
capability_str[len] = '\0';
for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) {
if (!strcmp(MigrationCapability_str(i), capability_str)) {
*capability = i;
return 0;
}
}
error_report("Received unknown capability %s", capability_str);
return -EINVAL;
}
static int put_capability(QEMUFile *f, void *pv, size_t size,
const VMStateField *field, QJSON *vmdesc)
{
MigrationCapability *capability = pv;
const char *capability_str = MigrationCapability_str(*capability);
size_t len = strlen(capability_str);
assert(len <= UINT8_MAX);
qemu_put_byte(f, len);
qemu_put_buffer(f, (uint8_t *)capability_str, len);
return 0;
}
static const VMStateInfo vmstate_info_capability = {
.name = "capability",
.get = get_capability,
.put = put_capability,
};
/* 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).
@ -324,6 +441,25 @@ static const VMStateDescription vmstate_target_page_bits = {
}
};
static bool vmstate_capabilites_needed(void *opaque)
{
return get_validatable_capabilities_count() > 0;
}
static const VMStateDescription vmstate_capabilites = {
.name = "configuration/capabilities",
.version_id = 1,
.minimum_version_id = 1,
.needed = vmstate_capabilites_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT32_V(caps_count, SaveState, 1),
VMSTATE_VARRAY_UINT32_ALLOC(capabilities, SaveState, caps_count, 1,
vmstate_info_capability,
MigrationCapability),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_configuration = {
.name = "configuration",
.version_id = 1,
@ -337,6 +473,7 @@ static const VMStateDescription vmstate_configuration = {
},
.subsections = (const VMStateDescription*[]) {
&vmstate_target_page_bits,
&vmstate_capabilites,
NULL
}
};
@ -951,6 +1088,7 @@ void qemu_savevm_state_header(QEMUFile *f)
void qemu_savevm_state_setup(QEMUFile *f)
{
SaveStateEntry *se;
Error *local_err = NULL;
int ret;
trace_savevm_state_setup();
@ -972,6 +1110,10 @@ void qemu_savevm_state_setup(QEMUFile *f)
break;
}
}
if (precopy_notify(PRECOPY_NOTIFY_SETUP, &local_err)) {
error_report_err(local_err);
}
}
int qemu_savevm_state_resume_prepare(MigrationState *s)
@ -1114,6 +1256,11 @@ int qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only,
SaveStateEntry *se;
int ret;
bool in_postcopy = migration_in_postcopy();
Error *local_err = NULL;
if (precopy_notify(PRECOPY_NOTIFY_COMPLETE, &local_err)) {
error_report_err(local_err);
}
trace_savevm_state_complete_precopy();
@ -1246,6 +1393,11 @@ void qemu_savevm_state_pending(QEMUFile *f, uint64_t threshold_size,
void qemu_savevm_state_cleanup(void)
{
SaveStateEntry *se;
Error *local_err = NULL;
if (precopy_notify(PRECOPY_NOTIFY_CLEANUP, &local_err)) {
error_report_err(local_err);
}
trace_savevm_state_cleanup();
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {

11
migration/socket.c
View File

@ -15,6 +15,7 @@
*/
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "qemu-common.h"
#include "qemu/error-report.h"
@ -177,6 +178,7 @@ static void socket_start_incoming_migration(SocketAddress *saddr,
Error **errp)
{
QIONetListener *listener = qio_net_listener_new();
size_t i;
qio_net_listener_set_name(listener, "migration-socket-listener");
@ -189,6 +191,15 @@ static void socket_start_incoming_migration(SocketAddress *saddr,
socket_accept_incoming_migration,
NULL, NULL,
g_main_context_get_thread_default());
for (i = 0; i < listener->nsioc; i++) {
SocketAddress *address =
qio_channel_socket_get_local_address(listener->sioc[i], errp);
if (!address) {
return;
}
migrate_add_address(address);
}
}
void tcp_start_incoming_migration(const char *host_port, Error **errp)

13
qapi/migration.json
View File

@ -6,6 +6,7 @@
##
{ 'include': 'common.json' }
{ 'include': 'sockets.json' }
##
# @MigrationStats:
@ -199,6 +200,8 @@
# @compression: migration compression statistics, only returned if compression
# feature is on and status is 'active' or 'completed' (Since 3.1)
#
# @socket-address: Only used for tcp, to know what the real port is (Since 4.0)
#
# Since: 0.14.0
##
{ 'struct': 'MigrationInfo',
@ -213,7 +216,8 @@
'*error-desc': 'str',
'*postcopy-blocktime' : 'uint32',
'*postcopy-vcpu-blocktime': ['uint32'],
'*compression': 'CompressionStats'} }
'*compression': 'CompressionStats',
'*socket-address': ['SocketAddress'] } }
##
# @query-migrate:
@ -409,13 +413,16 @@
# devices (and thus take locks) immediately at the end of migration.
# (since 3.0)
#
# @x-ignore-shared: If enabled, QEMU will not migrate shared memory (since 4.0)
#
# Since: 1.2
##
{ 'enum': 'MigrationCapability',
'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
'compress', 'events', 'postcopy-ram', 'x-colo', 'release-ram',
'block', 'return-path', 'pause-before-switchover', 'x-multifd',
'dirty-bitmaps', 'postcopy-blocktime', 'late-block-activate' ] }
'dirty-bitmaps', 'postcopy-blocktime', 'late-block-activate',
'x-ignore-shared' ] }
##
# @MigrationCapabilityStatus:
@ -1386,7 +1393,7 @@
# Example:
#
# -> { "execute": "query-colo-status" }
# <- { "return": { "mode": "primary", "active": true, "reason": "request" } }
# <- { "return": { "mode": "primary", "reason": "request" } }
#
# Since: 3.1
##

15
stubs/ram-block.c
View File

@ -2,6 +2,21 @@
#include "exec/ramlist.h"
#include "exec/cpu-common.h"
void *qemu_ram_get_host_addr(RAMBlock *rb)
{
return 0;
}
ram_addr_t qemu_ram_get_offset(RAMBlock *rb)
{
return 0;
}
ram_addr_t qemu_ram_get_used_length(RAMBlock *rb)
{
return 0;
}
void ram_block_notifier_add(RAMBlockNotifier *n)
{
}

308
tests/migration-test.c
View File

@ -20,6 +20,9 @@
#include "qemu/sockets.h"
#include "chardev/char.h"
#include "sysemu/sysemu.h"
#include "qapi/qapi-visit-sockets.h"
#include "qapi/qobject-input-visitor.h"
#include "qapi/qobject-output-visitor.h"
#include "migration/migration-test.h"
@ -215,10 +218,10 @@ static gchar *migrate_query_status(QTestState *who)
* events suddenly appearing confuse the qmp()/hmp() responses.
*/
static uint64_t get_migration_pass(QTestState *who)
static int64_t read_ram_property_int(QTestState *who, const char *property)
{
QDict *rsp_return, *rsp_ram;
uint64_t result;
int64_t result;
rsp_return = migrate_query(who);
if (!qdict_haskey(rsp_return, "ram")) {
@ -226,12 +229,17 @@ static uint64_t get_migration_pass(QTestState *who)
result = 0;
} else {
rsp_ram = qdict_get_qdict(rsp_return, "ram");
result = qdict_get_try_int(rsp_ram, "dirty-sync-count", 0);
result = qdict_get_try_int(rsp_ram, property, 0);
}
qobject_unref(rsp_return);
return result;
}
static uint64_t get_migration_pass(QTestState *who)
{
return read_ram_property_int(who, "dirty-sync-count");
}
static void read_blocktime(QTestState *who)
{
QDict *rsp_return;
@ -332,15 +340,75 @@ static void cleanup(const char *filename)
g_free(path);
}
static char *get_shmem_opts(const char *mem_size, const char *shmem_path)
{
return g_strdup_printf("-object memory-backend-file,id=mem0,size=%s"
",mem-path=%s,share=on -numa node,memdev=mem0",
mem_size, shmem_path);
}
static char *SocketAddress_to_str(SocketAddress *addr)
{
switch (addr->type) {
case SOCKET_ADDRESS_TYPE_INET:
return g_strdup_printf("tcp:%s:%s",
addr->u.inet.host,
addr->u.inet.port);
case SOCKET_ADDRESS_TYPE_UNIX:
return g_strdup_printf("unix:%s",
addr->u.q_unix.path);
case SOCKET_ADDRESS_TYPE_FD:
return g_strdup_printf("fd:%s", addr->u.fd.str);
case SOCKET_ADDRESS_TYPE_VSOCK:
return g_strdup_printf("tcp:%s:%s",
addr->u.vsock.cid,
addr->u.vsock.port);
default:
return g_strdup("unknown address type");
}
}
static char *migrate_get_socket_address(QTestState *who, const char *parameter)
{
QDict *rsp;
char *result;
Error *local_err = NULL;
SocketAddressList *addrs;
Visitor *iv = NULL;
QObject *object;
rsp = migrate_query(who);
object = qdict_get(rsp, parameter);
iv = qobject_input_visitor_new(object);
visit_type_SocketAddressList(iv, NULL, &addrs, &local_err);
/* we are only using a single address */
result = g_strdup_printf("%s", SocketAddress_to_str(addrs->value));
qapi_free_SocketAddressList(addrs);
qobject_unref(rsp);
return result;
}
static long long migrate_get_parameter(QTestState *who, const char *parameter)
{
QDict *rsp;
long long result;
rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
result = qdict_get_int(rsp, parameter);
qobject_unref(rsp);
return result;
}
static void migrate_check_parameter(QTestState *who, const char *parameter,
long long value)
{
QDict *rsp_return;
long long result;
rsp_return = wait_command(who,
"{ 'execute': 'query-migrate-parameters' }");
g_assert_cmpint(qdict_get_int(rsp_return, parameter), ==, value);
qobject_unref(rsp_return);
result = migrate_get_parameter(who, parameter);
g_assert_cmpint(result, ==, value);
}
static void migrate_set_parameter(QTestState *who, const char *parameter,
@ -430,73 +498,95 @@ static void migrate_postcopy_start(QTestState *from, QTestState *to)
}
static int test_migrate_start(QTestState **from, QTestState **to,
const char *uri, bool hide_stderr)
const char *uri, bool hide_stderr,
bool use_shmem)
{
gchar *cmd_src, *cmd_dst;
char *bootpath = g_strdup_printf("%s/bootsect", tmpfs);
char *bootpath = NULL;
char *extra_opts = NULL;
char *shmem_path = NULL;
const char *arch = qtest_get_arch();
const char *accel = "kvm:tcg";
got_stop = false;
if (use_shmem) {
if (!g_file_test("/dev/shm", G_FILE_TEST_IS_DIR)) {
g_test_skip("/dev/shm is not supported");
return -1;
}
shmem_path = g_strdup_printf("/dev/shm/qemu-%d", getpid());
}
got_stop = false;
bootpath = g_strdup_printf("%s/bootsect", tmpfs);
if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
init_bootfile(bootpath, x86_bootsect);
extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
" -name source,debug-threads=on"
" -serial file:%s/src_serial"
" -drive file=%s,format=raw",
accel, tmpfs, bootpath);
" -drive file=%s,format=raw %s",
accel, tmpfs, bootpath,
extra_opts ? extra_opts : "");
cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
" -name target,debug-threads=on"
" -serial file:%s/dest_serial"
" -drive file=%s,format=raw"
" -incoming %s",
accel, tmpfs, bootpath, uri);
" -incoming %s %s",
accel, tmpfs, bootpath, uri,
extra_opts ? extra_opts : "");
start_address = X86_TEST_MEM_START;
end_address = X86_TEST_MEM_END;
} else if (g_str_equal(arch, "s390x")) {
init_bootfile_s390x(bootpath);
extra_opts = use_shmem ? get_shmem_opts("128M", shmem_path) : NULL;
cmd_src = g_strdup_printf("-machine accel=%s -m 128M"
" -name source,debug-threads=on"
" -serial file:%s/src_serial -bios %s",
accel, tmpfs, bootpath);
" -serial file:%s/src_serial -bios %s %s",
accel, tmpfs, bootpath,
extra_opts ? extra_opts : "");
cmd_dst = g_strdup_printf("-machine accel=%s -m 128M"
" -name target,debug-threads=on"
" -serial file:%s/dest_serial -bios %s"
" -incoming %s",
accel, tmpfs, bootpath, uri);
" -incoming %s %s",
accel, tmpfs, bootpath, uri,
extra_opts ? extra_opts : "");
start_address = S390_TEST_MEM_START;
end_address = S390_TEST_MEM_END;
} else if (strcmp(arch, "ppc64") == 0) {
extra_opts = use_shmem ? get_shmem_opts("256M", shmem_path) : NULL;
cmd_src = g_strdup_printf("-machine accel=%s -m 256M -nodefaults"
" -name source,debug-threads=on"
" -serial file:%s/src_serial"
" -prom-env 'use-nvramrc?=true' -prom-env "
"'nvramrc=hex .\" _\" begin %x %x "
"do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
"until'", accel, tmpfs, end_address,
start_address);
"until' %s", accel, tmpfs, end_address,
start_address, extra_opts ? extra_opts : "");
cmd_dst = g_strdup_printf("-machine accel=%s -m 256M"
" -name target,debug-threads=on"
" -serial file:%s/dest_serial"
" -incoming %s",
accel, tmpfs, uri);
" -incoming %s %s",
accel, tmpfs, uri,
extra_opts ? extra_opts : "");
start_address = PPC_TEST_MEM_START;
end_address = PPC_TEST_MEM_END;
} else if (strcmp(arch, "aarch64") == 0) {
init_bootfile(bootpath, aarch64_kernel);
extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
cmd_src = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
"-name vmsource,debug-threads=on -cpu max "
"-m 150M -serial file:%s/src_serial "
"-kernel %s ",
accel, tmpfs, bootpath);
"-kernel %s %s",
accel, tmpfs, bootpath,
extra_opts ? extra_opts : "");
cmd_dst = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
"-name vmdest,debug-threads=on -cpu max "
"-m 150M -serial file:%s/dest_serial "
"-kernel %s "
"-incoming %s ",
accel, tmpfs, bootpath, uri);
"-incoming %s %s",
accel, tmpfs, bootpath, uri,
extra_opts ? extra_opts : "");
start_address = ARM_TEST_MEM_START;
end_address = ARM_TEST_MEM_END;
@ -507,6 +597,7 @@ static int test_migrate_start(QTestState **from, QTestState **to,
}
g_free(bootpath);
g_free(extra_opts);
if (hide_stderr) {
gchar *tmp;
@ -524,6 +615,16 @@ static int test_migrate_start(QTestState **from, QTestState **to,
*to = qtest_init(cmd_dst);
g_free(cmd_dst);
/*
* Remove shmem file immediately to avoid memory leak in test failed case.
* It's valid becase QEMU has already opened this file
*/
if (use_shmem) {
unlink(shmem_path);
g_free(shmem_path);
}
return 0;
}
@ -584,6 +685,17 @@ static void deprecated_set_speed(QTestState *who, long long value)
migrate_check_parameter(who, "max-bandwidth", value);
}
static void deprecated_set_cache_size(QTestState *who, long long value)
{
QDict *rsp;
rsp = qtest_qmp(who, "{ 'execute': 'migrate-set-cache-size',"
"'arguments': { 'value': %lld } }", value);
g_assert(qdict_haskey(rsp, "return"));
qobject_unref(rsp);
migrate_check_parameter(who, "xbzrle-cache-size", value);
}
static void test_deprecated(void)
{
QTestState *from;
@ -592,6 +704,7 @@ static void test_deprecated(void)
deprecated_set_downtime(from, 0.12345);
deprecated_set_speed(from, 12345);
deprecated_set_cache_size(from, 4096);
qtest_quit(from);
}
@ -603,7 +716,7 @@ static int migrate_postcopy_prepare(QTestState **from_ptr,
char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
QTestState *from, *to;
if (test_migrate_start(&from, &to, uri, hide_error)) {
if (test_migrate_start(&from, &to, uri, hide_error, false)) {
return -1;
}
@ -720,7 +833,7 @@ static void test_baddest(void)
char *status;
bool failed;
if (test_migrate_start(&from, &to, "tcp:0:0", true)) {
if (test_migrate_start(&from, &to, "tcp:0:0", true, false)) {
return;
}
migrate(from, "tcp:0:0", "{}");
@ -745,7 +858,7 @@ static void test_precopy_unix(void)
char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
QTestState *from, *to;
if (test_migrate_start(&from, &to, uri, false)) {
if (test_migrate_start(&from, &to, uri, false, false)) {
return;
}
@ -781,6 +894,138 @@ static void test_precopy_unix(void)
g_free(uri);
}
#if 0
/* Currently upset on aarch64 TCG */
static void test_ignore_shared(void)
{
char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
QTestState *from, *to;
if (test_migrate_start(&from, &to, uri, false, true)) {
return;
}
migrate_set_capability(from, "x-ignore-shared", true);
migrate_set_capability(to, "x-ignore-shared", true);
/* Wait for the first serial output from the source */
wait_for_serial("src_serial");
migrate(from, uri, "{}");
wait_for_migration_pass(from);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");
}
qtest_qmp_eventwait(to, "RESUME");
wait_for_serial("dest_serial");
wait_for_migration_complete(from);
/* Check whether shared RAM has been really skipped */
g_assert_cmpint(read_ram_property_int(from, "transferred"), <, 1024 * 1024);
test_migrate_end(from, to, true);
g_free(uri);
}
#endif
static void test_xbzrle(const char *uri)
{
QTestState *from, *to;
if (test_migrate_start(&from, &to, uri, false, false)) {
return;
}
/*
* We want to pick a speed slow enough that the test completes
* quickly, but that it doesn't complete precopy even on a slow
* machine, so also set the downtime.
*/
/* 1 ms should make it not converge*/
migrate_set_parameter(from, "downtime-limit", 1);
/* 1GB/s */
migrate_set_parameter(from, "max-bandwidth", 1000000000);
migrate_set_parameter(from, "xbzrle-cache-size", 33554432);
migrate_set_capability(from, "xbzrle", "true");
migrate_set_capability(to, "xbzrle", "true");
/* Wait for the first serial output from the source */
wait_for_serial("src_serial");
migrate(from, uri, "{}");
wait_for_migration_pass(from);
/* 300ms should converge */
migrate_set_parameter(from, "downtime-limit", 300);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");
}
qtest_qmp_eventwait(to, "RESUME");
wait_for_serial("dest_serial");
wait_for_migration_complete(from);
test_migrate_end(from, to, true);
}
static void test_xbzrle_unix(void)
{
char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
test_xbzrle(uri);
g_free(uri);
}
static void test_precopy_tcp(void)
{
char *uri;
QTestState *from, *to;
if (test_migrate_start(&from, &to, "tcp:127.0.0.1:0", false, false)) {
return;
}
/*
* We want to pick a speed slow enough that the test completes
* quickly, but that it doesn't complete precopy even on a slow
* machine, so also set the downtime.
*/
/* 1 ms should make it not converge*/
migrate_set_parameter(from, "downtime-limit", 1);
/* 1GB/s */
migrate_set_parameter(from, "max-bandwidth", 1000000000);
/* Wait for the first serial output from the source */
wait_for_serial("src_serial");
uri = migrate_get_socket_address(to, "socket-address");
migrate(from, uri, "{}");
wait_for_migration_pass(from);
/* 300ms should converge */
migrate_set_parameter(from, "downtime-limit", 300);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");
}
qtest_qmp_eventwait(to, "RESUME");
wait_for_serial("dest_serial");
wait_for_migration_complete(from);
test_migrate_end(from, to, true);
g_free(uri);
}
int main(int argc, char **argv)
{
char template[] = "/tmp/migration-test-XXXXXX";
@ -832,6 +1077,9 @@ int main(int argc, char **argv)
qtest_add_func("/migration/deprecated", test_deprecated);
qtest_add_func("/migration/bad_dest", test_baddest);
qtest_add_func("/migration/precopy/unix", test_precopy_unix);
qtest_add_func("/migration/precopy/tcp", test_precopy_tcp);
/* qtest_add_func("/migration/ignore_shared", test_ignore_shared); */
qtest_add_func("/migration/xbzrle/unix", test_xbzrle_unix);
ret = g_test_run();

6
util/vfio-helpers.c
View File

@ -391,10 +391,10 @@ static void qemu_vfio_ram_block_removed(RAMBlockNotifier *n,
}
}
static int qemu_vfio_init_ramblock(const char *block_name, void *host_addr,
ram_addr_t offset, ram_addr_t length,
void *opaque)
static int qemu_vfio_init_ramblock(RAMBlock *rb, void *opaque)
{
void *host_addr = qemu_ram_get_host_addr(rb);
ram_addr_t length = qemu_ram_get_used_length(rb);
int ret;
QEMUVFIOState *s = opaque;

8
vl.c
View File

@ -3039,6 +3039,7 @@ int main(int argc, char **argv, char **envp)
module_call_init(MODULE_INIT_OPTS);
runstate_init();
precopy_infrastructure_init();
postcopy_infrastructure_init();
monitor_init_globals();
@ -4579,6 +4580,12 @@ int main(int argc, char **argv, char **envp)
gdbserver_cleanup();
/*
* cleaning up the migration object cancels any existing migration
* try to do this early so that it also stops using devices.
*/
migration_shutdown();
/* No more vcpu or device emulation activity beyond this point */
vm_shutdown();
@ -4594,7 +4601,6 @@ int main(int argc, char **argv, char **envp)
monitor_cleanup();
qemu_chr_cleanup();
user_creatable_cleanup();
migration_object_finalize();
/* TODO: unref root container, check all devices are ok */
return 0;