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migration/next for 20170421 

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Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20170421' into staging

migration/next for 20170421

# gpg: Signature made Fri 21 Apr 2017 11:28:13 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

* remotes/juanquintela/tags/migration/20170421: (65 commits)
  hmp: info migrate_parameters format tunes
  hmp: info migrate_capability format tunes
  migration: rename max_size to threshold_size
  migration: set current_active_state once
  virtio-rng: stop virtqueue while the CPU is stopped
  migration: don't close a file descriptor while it can be in use
  ram: Remove migration_bitmap_extend()
  migration: Disable hotplug/unplug during migration
  qdev: Move qdev_unplug() to qdev-monitor.c
  qdev: Export qdev_hot_removed
  qdev: qdev_hotplug is really a bool
  migration: Remove MigrationState parameter from migration_is_idle()
  ram: Use RAMBitmap type for coherence
  ram: rename last_ram_offset() last_ram_pages()
  ram: Use ramblock and page offset instead of absolute offset
  ram: Change offset field in PageSearchStatus to page
  ram: Remember last_page instead of last_offset
  ram: Use page number instead of an address for the bitmap operations
  ram: reorganize last_sent_block
  ram: ram_discard_range() don't use the mis parameter
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2017-04-21 15:59:27 +01:00
parent af7ec403b2 2c02468c9b
commit 32c7e0ab75
18 changed files with 839 additions and 779 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
exec.c
View File

@ -1528,7 +1528,7 @@ static ram_addr_t find_ram_offset(ram_addr_t size)
return offset; return offset;
} }
ram_addr_t last_ram_offset(void) unsigned long last_ram_page(void)
{ {
RAMBlock *block; RAMBlock *block;
ram_addr_t last = 0; ram_addr_t last = 0;
@ -1538,7 +1538,7 @@ ram_addr_t last_ram_offset(void)
last = MAX(last, block->offset + block->max_length); last = MAX(last, block->offset + block->max_length);
} }
rcu_read_unlock(); rcu_read_unlock();
return last; return last >> TARGET_PAGE_BITS;
} }
static void qemu_ram_setup_dump(void *addr, ram_addr_t size) static void qemu_ram_setup_dump(void *addr, ram_addr_t size)
@ -1727,7 +1727,7 @@ static void ram_block_add(RAMBlock *new_block, Error **errp)
ram_addr_t old_ram_size, new_ram_size; ram_addr_t old_ram_size, new_ram_size;
Error *err = NULL; Error *err = NULL;
old_ram_size = last_ram_offset() >> TARGET_PAGE_BITS; old_ram_size = last_ram_page();
qemu_mutex_lock_ramlist(); qemu_mutex_lock_ramlist();
new_block->offset = find_ram_offset(new_block->max_length); new_block->offset = find_ram_offset(new_block->max_length);
@ -1758,7 +1758,6 @@ static void ram_block_add(RAMBlock *new_block, Error **errp)
new_ram_size = MAX(old_ram_size, new_ram_size = MAX(old_ram_size,
(new_block->offset + new_block->max_length) >> TARGET_PAGE_BITS); (new_block->offset + new_block->max_length) >> TARGET_PAGE_BITS);
if (new_ram_size > old_ram_size) { if (new_ram_size > old_ram_size) {
migration_bitmap_extend(old_ram_size, new_ram_size);
dirty_memory_extend(old_ram_size, new_ram_size); dirty_memory_extend(old_ram_size, new_ram_size);
} }
/* Keep the list sorted from biggest to smallest block. Unlike QTAILQ, /* Keep the list sorted from biggest to smallest block. Unlike QTAILQ,
@ -3307,9 +3306,9 @@ int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
* Allows code that needs to deal with migration bitmaps etc to still be built * Allows code that needs to deal with migration bitmaps etc to still be built
* target independent. * target independent.
*/ */
size_t qemu_target_page_bits(void) size_t qemu_target_page_size(void)
{ {
return TARGET_PAGE_BITS; return TARGET_PAGE_SIZE;
} }
#endif #endif

29
hmp.c
View File

@ -215,6 +215,9 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict)
info->ram->normal_bytes >> 10); info->ram->normal_bytes >> 10);
monitor_printf(mon, "dirty sync count: %" PRIu64 "\n", monitor_printf(mon, "dirty sync count: %" PRIu64 "\n",
info->ram->dirty_sync_count); info->ram->dirty_sync_count);
monitor_printf(mon, "page size: %" PRIu64 " kbytes\n",
info->ram->page_size >> 10);
if (info->ram->dirty_pages_rate) { if (info->ram->dirty_pages_rate) {
monitor_printf(mon, "dirty pages rate: %" PRIu64 " pages\n", monitor_printf(mon, "dirty pages rate: %" PRIu64 " pages\n",
info->ram->dirty_pages_rate); info->ram->dirty_pages_rate);
@ -265,13 +268,11 @@ void hmp_info_migrate_capabilities(Monitor *mon, const QDict *qdict)
caps = qmp_query_migrate_capabilities(NULL); caps = qmp_query_migrate_capabilities(NULL);
if (caps) { if (caps) {
monitor_printf(mon, "capabilities: ");
for (cap = caps; cap; cap = cap->next) { for (cap = caps; cap; cap = cap->next) {
monitor_printf(mon, "%s: %s ", monitor_printf(mon, "%s: %s\n",
MigrationCapability_lookup[cap->value->capability], MigrationCapability_lookup[cap->value->capability],
cap->value->state ? "on" : "off"); cap->value->state ? "on" : "off");
} }
monitor_printf(mon, "\n");
} }
qapi_free_MigrationCapabilityStatusList(caps); qapi_free_MigrationCapabilityStatusList(caps);
@ -284,46 +285,44 @@ void hmp_info_migrate_parameters(Monitor *mon, const QDict *qdict)
params = qmp_query_migrate_parameters(NULL); params = qmp_query_migrate_parameters(NULL);
if (params) { if (params) {
monitor_printf(mon, "parameters:");
assert(params->has_compress_level); assert(params->has_compress_level);
monitor_printf(mon, " %s: %" PRId64, monitor_printf(mon, "%s: %" PRId64 "\n",
MigrationParameter_lookup[MIGRATION_PARAMETER_COMPRESS_LEVEL], MigrationParameter_lookup[MIGRATION_PARAMETER_COMPRESS_LEVEL],
params->compress_level); params->compress_level);
assert(params->has_compress_threads); assert(params->has_compress_threads);
monitor_printf(mon, " %s: %" PRId64, monitor_printf(mon, "%s: %" PRId64 "\n",
MigrationParameter_lookup[MIGRATION_PARAMETER_COMPRESS_THREADS], MigrationParameter_lookup[MIGRATION_PARAMETER_COMPRESS_THREADS],
params->compress_threads); params->compress_threads);
assert(params->has_decompress_threads); assert(params->has_decompress_threads);
monitor_printf(mon, " %s: %" PRId64, monitor_printf(mon, "%s: %" PRId64 "\n",
MigrationParameter_lookup[MIGRATION_PARAMETER_DECOMPRESS_THREADS], MigrationParameter_lookup[MIGRATION_PARAMETER_DECOMPRESS_THREADS],
params->decompress_threads); params->decompress_threads);
assert(params->has_cpu_throttle_initial); assert(params->has_cpu_throttle_initial);
monitor_printf(mon, " %s: %" PRId64, monitor_printf(mon, "%s: %" PRId64 "\n",
MigrationParameter_lookup[MIGRATION_PARAMETER_CPU_THROTTLE_INITIAL], MigrationParameter_lookup[MIGRATION_PARAMETER_CPU_THROTTLE_INITIAL],
params->cpu_throttle_initial); params->cpu_throttle_initial);
assert(params->has_cpu_throttle_increment); assert(params->has_cpu_throttle_increment);
monitor_printf(mon, " %s: %" PRId64, monitor_printf(mon, "%s: %" PRId64 "\n",
MigrationParameter_lookup[MIGRATION_PARAMETER_CPU_THROTTLE_INCREMENT], MigrationParameter_lookup[MIGRATION_PARAMETER_CPU_THROTTLE_INCREMENT],
params->cpu_throttle_increment); params->cpu_throttle_increment);
monitor_printf(mon, " %s: '%s'", monitor_printf(mon, "%s: '%s'\n",
MigrationParameter_lookup[MIGRATION_PARAMETER_TLS_CREDS], MigrationParameter_lookup[MIGRATION_PARAMETER_TLS_CREDS],
params->has_tls_creds ? params->tls_creds : ""); params->has_tls_creds ? params->tls_creds : "");
monitor_printf(mon, " %s: '%s'", monitor_printf(mon, "%s: '%s'\n",
MigrationParameter_lookup[MIGRATION_PARAMETER_TLS_HOSTNAME], MigrationParameter_lookup[MIGRATION_PARAMETER_TLS_HOSTNAME],
params->has_tls_hostname ? params->tls_hostname : ""); params->has_tls_hostname ? params->tls_hostname : "");
assert(params->has_max_bandwidth); assert(params->has_max_bandwidth);
monitor_printf(mon, " %s: %" PRId64 " bytes/second", monitor_printf(mon, "%s: %" PRId64 " bytes/second\n",
MigrationParameter_lookup[MIGRATION_PARAMETER_MAX_BANDWIDTH], MigrationParameter_lookup[MIGRATION_PARAMETER_MAX_BANDWIDTH],
params->max_bandwidth); params->max_bandwidth);
assert(params->has_downtime_limit); assert(params->has_downtime_limit);
monitor_printf(mon, " %s: %" PRId64 " milliseconds", monitor_printf(mon, "%s: %" PRId64 " milliseconds\n",
MigrationParameter_lookup[MIGRATION_PARAMETER_DOWNTIME_LIMIT], MigrationParameter_lookup[MIGRATION_PARAMETER_DOWNTIME_LIMIT],
params->downtime_limit); params->downtime_limit);
assert(params->has_x_checkpoint_delay); assert(params->has_x_checkpoint_delay);
monitor_printf(mon, " %s: %" PRId64, monitor_printf(mon, "%s: %" PRId64 "\n",
MigrationParameter_lookup[MIGRATION_PARAMETER_X_CHECKPOINT_DELAY], MigrationParameter_lookup[MIGRATION_PARAMETER_X_CHECKPOINT_DELAY],
params->x_checkpoint_delay); params->x_checkpoint_delay);
monitor_printf(mon, "\n");
} }
qapi_free_MigrationParameters(params); qapi_free_MigrationParameters(params);

40
hw/core/qdev.c
View File

@ -39,9 +39,9 @@
#include "qapi-event.h" #include "qapi-event.h"
#include "migration/migration.h" #include "migration/migration.h"
int qdev_hotplug = 0; bool qdev_hotplug = false;
static bool qdev_hot_added = false; static bool qdev_hot_added = false;
static bool qdev_hot_removed = false; bool qdev_hot_removed = false;
const VMStateDescription *qdev_get_vmsd(DeviceState *dev) const VMStateDescription *qdev_get_vmsd(DeviceState *dev)
{ {
@ -271,40 +271,6 @@ HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev)
return hotplug_ctrl; return hotplug_ctrl;
} }
void qdev_unplug(DeviceState *dev, Error **errp)
{
DeviceClass *dc = DEVICE_GET_CLASS(dev);
HotplugHandler *hotplug_ctrl;
HotplugHandlerClass *hdc;
if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
return;
}
if (!dc->hotpluggable) {
error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
object_get_typename(OBJECT(dev)));
return;
}
qdev_hot_removed = true;
hotplug_ctrl = qdev_get_hotplug_handler(dev);
/* hotpluggable device MUST have HotplugHandler, if it doesn't
* then something is very wrong with it */
g_assert(hotplug_ctrl);
/* If device supports async unplug just request it to be done,
* otherwise just remove it synchronously */
hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
if (hdc->unplug_request) {
hotplug_handler_unplug_request(hotplug_ctrl, dev, errp);
} else {
hotplug_handler_unplug(hotplug_ctrl, dev, errp);
}
}
static int qdev_reset_one(DeviceState *dev, void *opaque) static int qdev_reset_one(DeviceState *dev, void *opaque)
{ {
device_reset(dev); device_reset(dev);
@ -385,7 +351,7 @@ void qdev_machine_creation_done(void)
* ok, initial machine setup is done, starting from now we can * ok, initial machine setup is done, starting from now we can
* only create hotpluggable devices * only create hotpluggable devices
*/ */
qdev_hotplug = 1; qdev_hotplug = true;
} }
bool qdev_machine_modified(void) bool qdev_machine_modified(void)

3
hw/virtio/trace-events
View File

@ -11,8 +11,11 @@ virtio_set_status(void *vdev, uint8_t val) "vdev %p val %u"
# hw/virtio/virtio-rng.c # hw/virtio/virtio-rng.c
virtio_rng_guest_not_ready(void *rng) "rng %p: guest not ready" virtio_rng_guest_not_ready(void *rng) "rng %p: guest not ready"
virtio_rng_cpu_is_stopped(void *rng, int size) "rng %p: cpu is stopped, dropping %d bytes"
virtio_rng_popped(void *rng) "rng %p: elem popped"
virtio_rng_pushed(void *rng, size_t len) "rng %p: %zd bytes pushed" virtio_rng_pushed(void *rng, size_t len) "rng %p: %zd bytes pushed"
virtio_rng_request(void *rng, size_t size, unsigned quota) "rng %p: %zd bytes requested, %u bytes quota left" virtio_rng_request(void *rng, size_t size, unsigned quota) "rng %p: %zd bytes requested, %u bytes quota left"
virtio_rng_vm_state_change(void *rng, int running, int state) "rng %p: state change to running %d state %d"
# hw/virtio/virtio-balloon.c # hw/virtio/virtio-balloon.c
# #

33
hw/virtio/virtio-rng.c
View File

@ -53,6 +53,15 @@ static void chr_read(void *opaque, const void *buf, size_t size)
return; return;
} }
/* we can't modify the virtqueue until
* our state is fully synced
*/
if (!runstate_check(RUN_STATE_RUNNING)) {
trace_virtio_rng_cpu_is_stopped(vrng, size);
return;
}
vrng->quota_remaining -= size; vrng->quota_remaining -= size;
offset = 0; offset = 0;
@ -61,6 +70,7 @@ static void chr_read(void *opaque, const void *buf, size_t size)
if (!elem) { if (!elem) {
break; break;
} }
trace_virtio_rng_popped(vrng);
len = iov_from_buf(elem->in_sg, elem->in_num, len = iov_from_buf(elem->in_sg, elem->in_num,
0, buf + offset, size - offset); 0, buf + offset, size - offset);
offset += len; offset += len;
@ -120,17 +130,21 @@ static uint64_t get_features(VirtIODevice *vdev, uint64_t f, Error **errp)
return f; return f;
} }
static int virtio_rng_post_load(void *opaque, int version_id) static void virtio_rng_vm_state_change(void *opaque, int running,
RunState state)
{ {
VirtIORNG *vrng = opaque; VirtIORNG *vrng = opaque;
/* We may have an element ready but couldn't process it due to a quota trace_virtio_rng_vm_state_change(vrng, running, state);
* limit. Make sure to try again after live migration when the quota may
* have been reset.
*/
virtio_rng_process(vrng);
return 0; /* We may have an element ready but couldn't process it due to a quota
* limit or because CPU was stopped. Make sure to try again when the
* CPU restart.
*/
if (running && is_guest_ready(vrng)) {
virtio_rng_process(vrng);
}
} }
static void check_rate_limit(void *opaque) static void check_rate_limit(void *opaque)
@ -198,6 +212,9 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
vrng->rate_limit_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, vrng->rate_limit_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
check_rate_limit, vrng); check_rate_limit, vrng);
vrng->activate_timer = true; vrng->activate_timer = true;
vrng->vmstate = qemu_add_vm_change_state_handler(virtio_rng_vm_state_change,
vrng);
} }
static void virtio_rng_device_unrealize(DeviceState *dev, Error **errp) static void virtio_rng_device_unrealize(DeviceState *dev, Error **errp)
@ -205,6 +222,7 @@ static void virtio_rng_device_unrealize(DeviceState *dev, Error **errp)
VirtIODevice *vdev = VIRTIO_DEVICE(dev); VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtIORNG *vrng = VIRTIO_RNG(dev); VirtIORNG *vrng = VIRTIO_RNG(dev);
qemu_del_vm_change_state_handler(vrng->vmstate);
timer_del(vrng->rate_limit_timer); timer_del(vrng->rate_limit_timer);
timer_free(vrng->rate_limit_timer); timer_free(vrng->rate_limit_timer);
virtio_cleanup(vdev); virtio_cleanup(vdev);
@ -218,7 +236,6 @@ static const VMStateDescription vmstate_virtio_rng = {
VMSTATE_VIRTIO_DEVICE, VMSTATE_VIRTIO_DEVICE,
VMSTATE_END_OF_LIST() VMSTATE_END_OF_LIST()
}, },
.post_load = virtio_rng_post_load,
}; };
static Property virtio_rng_properties[] = { static Property virtio_rng_properties[] = {

8
include/exec/ram_addr.h
View File

@ -53,7 +53,7 @@ static inline void *ramblock_ptr(RAMBlock *block, ram_addr_t offset)
} }
long qemu_getrampagesize(void); long qemu_getrampagesize(void);
ram_addr_t last_ram_offset(void); unsigned long last_ram_page(void);
RAMBlock *qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr, RAMBlock *qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
bool share, const char *mem_path, bool share, const char *mem_path,
Error **errp); Error **errp);
@ -354,11 +354,13 @@ static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
static inline static inline
uint64_t cpu_physical_memory_sync_dirty_bitmap(unsigned long *dest, uint64_t cpu_physical_memory_sync_dirty_bitmap(unsigned long *dest,
RAMBlock *rb,
ram_addr_t start, ram_addr_t start,
ram_addr_t length, ram_addr_t length,
int64_t *real_dirty_pages) uint64_t *real_dirty_pages)
{ {
ram_addr_t addr; ram_addr_t addr;
start = rb->offset + start;
unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS); unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
uint64_t num_dirty = 0; uint64_t num_dirty = 0;
@ -411,7 +413,5 @@ uint64_t cpu_physical_memory_sync_dirty_bitmap(unsigned long *dest,
return num_dirty; return num_dirty;
} }
void migration_bitmap_extend(ram_addr_t old, ram_addr_t new);
#endif #endif
#endif #endif

3
include/hw/qdev-core.h
View File

@ -373,7 +373,8 @@ Object *qdev_get_machine(void);
/* FIXME: make this a link<> */ /* FIXME: make this a link<> */
void qdev_set_parent_bus(DeviceState *dev, BusState *bus); void qdev_set_parent_bus(DeviceState *dev, BusState *bus);
extern int qdev_hotplug; extern bool qdev_hotplug;
extern bool qdev_hot_removed;
char *qdev_get_dev_path(DeviceState *dev); char *qdev_get_dev_path(DeviceState *dev);

2
include/hw/virtio/virtio-rng.h
View File

@ -45,6 +45,8 @@ typedef struct VirtIORNG {
QEMUTimer *rate_limit_timer; QEMUTimer *rate_limit_timer;
int64_t quota_remaining; int64_t quota_remaining;
bool activate_timer; bool activate_timer;
VMChangeStateEntry *vmstate;
} VirtIORNG; } VirtIORNG;
#endif #endif

41
include/migration/migration.h
View File

@ -128,18 +128,6 @@ struct MigrationIncomingState {
MigrationIncomingState *migration_incoming_get_current(void); MigrationIncomingState *migration_incoming_get_current(void);
void migration_incoming_state_destroy(void); void migration_incoming_state_destroy(void);
/*
* An outstanding page request, on the source, having been received
* and queued
*/
struct MigrationSrcPageRequest {
RAMBlock *rb;
hwaddr offset;
hwaddr len;
QSIMPLEQ_ENTRY(MigrationSrcPageRequest) next_req;
};
struct MigrationState struct MigrationState
{ {
size_t bytes_xfer; size_t bytes_xfer;
@ -166,14 +154,9 @@ struct MigrationState
int64_t total_time; int64_t total_time;
int64_t downtime; int64_t downtime;
int64_t expected_downtime; int64_t expected_downtime;
int64_t dirty_pages_rate;
int64_t dirty_bytes_rate;
bool enabled_capabilities[MIGRATION_CAPABILITY__MAX]; bool enabled_capabilities[MIGRATION_CAPABILITY__MAX];
int64_t xbzrle_cache_size; int64_t xbzrle_cache_size;
int64_t setup_time; int64_t setup_time;
int64_t dirty_sync_count;
/* Count of requests incoming from destination */
int64_t postcopy_requests;
/* Flag set once the migration has been asked to enter postcopy */ /* Flag set once the migration has been asked to enter postcopy */
bool start_postcopy; bool start_postcopy;
@ -186,11 +169,6 @@ struct MigrationState
/* Flag set once the migration thread called bdrv_inactivate_all */ /* Flag set once the migration thread called bdrv_inactivate_all */
bool block_inactive; bool block_inactive;
/* Queue of outstanding page requests from the destination */
QemuMutex src_page_req_mutex;
QSIMPLEQ_HEAD(src_page_requests, MigrationSrcPageRequest) src_page_requests;
/* The RAMBlock used in the last src_page_request */
RAMBlock *last_req_rb;
/* The semaphore is used to notify COLO thread that failover is finished */ /* The semaphore is used to notify COLO thread that failover is finished */
QemuSemaphore colo_exit_sem; QemuSemaphore colo_exit_sem;
@ -256,11 +234,11 @@ void remove_migration_state_change_notifier(Notifier *notify);
MigrationState *migrate_init(const MigrationParams *params); MigrationState *migrate_init(const MigrationParams *params);
bool migration_is_blocked(Error **errp); bool migration_is_blocked(Error **errp);
bool migration_in_setup(MigrationState *); bool migration_in_setup(MigrationState *);
bool migration_is_idle(MigrationState *s); bool migration_is_idle(void);
bool migration_has_finished(MigrationState *); bool migration_has_finished(MigrationState *);
bool migration_has_failed(MigrationState *); bool migration_has_failed(MigrationState *);
/* True if outgoing migration has entered postcopy phase */ /* True if outgoing migration has entered postcopy phase */
bool migration_in_postcopy(MigrationState *); bool migration_in_postcopy(void);
/* ...and after the device transmission */ /* ...and after the device transmission */
bool migration_in_postcopy_after_devices(MigrationState *); bool migration_in_postcopy_after_devices(MigrationState *);
MigrationState *migrate_get_current(void); MigrationState *migrate_get_current(void);
@ -272,15 +250,14 @@ void migrate_decompress_threads_join(void);
uint64_t ram_bytes_remaining(void); uint64_t ram_bytes_remaining(void);
uint64_t ram_bytes_transferred(void); uint64_t ram_bytes_transferred(void);
uint64_t ram_bytes_total(void); uint64_t ram_bytes_total(void);
uint64_t ram_dirty_sync_count(void);
uint64_t ram_dirty_pages_rate(void);
uint64_t ram_postcopy_requests(void);
void free_xbzrle_decoded_buf(void); void free_xbzrle_decoded_buf(void);
void acct_update_position(QEMUFile *f, size_t size, bool zero); void acct_update_position(QEMUFile *f, size_t size, bool zero);
uint64_t dup_mig_bytes_transferred(void);
uint64_t dup_mig_pages_transferred(void); uint64_t dup_mig_pages_transferred(void);
uint64_t skipped_mig_bytes_transferred(void);
uint64_t skipped_mig_pages_transferred(void);
uint64_t norm_mig_bytes_transferred(void);
uint64_t norm_mig_pages_transferred(void); uint64_t norm_mig_pages_transferred(void);
uint64_t xbzrle_mig_bytes_transferred(void); uint64_t xbzrle_mig_bytes_transferred(void);
uint64_t xbzrle_mig_pages_transferred(void); uint64_t xbzrle_mig_pages_transferred(void);
@ -293,8 +270,7 @@ void ram_debug_dump_bitmap(unsigned long *todump, bool expected);
/* For outgoing discard bitmap */ /* For outgoing discard bitmap */
int ram_postcopy_send_discard_bitmap(MigrationState *ms); int ram_postcopy_send_discard_bitmap(MigrationState *ms);
/* For incoming postcopy discard */ /* For incoming postcopy discard */
int ram_discard_range(MigrationIncomingState *mis, const char *block_name, int ram_discard_range(const char *block_name, uint64_t start, size_t length);
uint64_t start, size_t length);
int ram_postcopy_incoming_init(MigrationIncomingState *mis); int ram_postcopy_incoming_init(MigrationIncomingState *mis);
void ram_postcopy_migrated_memory_release(MigrationState *ms); void ram_postcopy_migrated_memory_release(MigrationState *ms);
@ -377,9 +353,8 @@ void savevm_skip_configuration(void);
int global_state_store(void); int global_state_store(void);
void global_state_store_running(void); void global_state_store_running(void);
void flush_page_queue(MigrationState *ms); void migration_page_queue_free(void);
int ram_save_queue_pages(MigrationState *ms, const char *rbname, int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len);
ram_addr_t start, ram_addr_t len);
uint64_t ram_pagesize_summary(void); uint64_t ram_pagesize_summary(void);
PostcopyState postcopy_state_get(void); PostcopyState postcopy_state_get(void);

3
include/migration/vmstate.h
View File

@ -56,7 +56,8 @@ typedef struct SaveVMHandlers {
/* This runs outside the iothread lock! */ /* This runs outside the iothread lock! */
int (*save_live_setup)(QEMUFile *f, void *opaque); int (*save_live_setup)(QEMUFile *f, void *opaque);
void (*save_live_pending)(QEMUFile *f, void *opaque, uint64_t max_size, void (*save_live_pending)(QEMUFile *f, void *opaque,
uint64_t threshold_size,
uint64_t *non_postcopiable_pending, uint64_t *non_postcopiable_pending,
uint64_t *postcopiable_pending); uint64_t *postcopiable_pending);
LoadStateHandler *load_state; LoadStateHandler *load_state;

2
include/sysemu/sysemu.h
View File

@ -67,7 +67,7 @@ int qemu_reset_requested_get(void);
void qemu_system_killed(int signal, pid_t pid); void qemu_system_killed(int signal, pid_t pid);
void qemu_system_reset(bool report); void qemu_system_reset(bool report);
void qemu_system_guest_panicked(GuestPanicInformation *info); void qemu_system_guest_panicked(GuestPanicInformation *info);
size_t qemu_target_page_bits(void); size_t qemu_target_page_size(void);
void qemu_add_exit_notifier(Notifier *notify); void qemu_add_exit_notifier(Notifier *notify);
void qemu_remove_exit_notifier(Notifier *notify); void qemu_remove_exit_notifier(Notifier *notify);

72
migration/migration.c
View File

@ -109,7 +109,6 @@ MigrationState *migrate_get_current(void)
}; };
if (!once) { if (!once) {
qemu_mutex_init(&current_migration.src_page_req_mutex);
current_migration.parameters.tls_creds = g_strdup(""); current_migration.parameters.tls_creds = g_strdup("");
current_migration.parameters.tls_hostname = g_strdup(""); current_migration.parameters.tls_hostname = g_strdup("");
once = true; once = true;
@ -436,9 +435,6 @@ static void process_incoming_migration_co(void *opaque)
qemu_thread_join(&mis->colo_incoming_thread); qemu_thread_join(&mis->colo_incoming_thread);
} }
qemu_fclose(f);
free_xbzrle_decoded_buf();
if (ret < 0) { if (ret < 0) {
migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE,
MIGRATION_STATUS_FAILED); MIGRATION_STATUS_FAILED);
@ -447,6 +443,9 @@ static void process_incoming_migration_co(void *opaque)
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
qemu_fclose(f);
free_xbzrle_decoded_buf();
mis->bh = qemu_bh_new(process_incoming_migration_bh, mis); mis->bh = qemu_bh_new(process_incoming_migration_bh, mis);
qemu_bh_schedule(mis->bh); qemu_bh_schedule(mis->bh);
} }
@ -651,16 +650,19 @@ static void populate_ram_info(MigrationInfo *info, MigrationState *s)
info->ram->transferred = ram_bytes_transferred(); info->ram->transferred = ram_bytes_transferred();
info->ram->total = ram_bytes_total(); info->ram->total = ram_bytes_total();
info->ram->duplicate = dup_mig_pages_transferred(); info->ram->duplicate = dup_mig_pages_transferred();
info->ram->skipped = skipped_mig_pages_transferred(); /* legacy value. It is not used anymore */
info->ram->skipped = 0;
info->ram->normal = norm_mig_pages_transferred(); info->ram->normal = norm_mig_pages_transferred();
info->ram->normal_bytes = norm_mig_bytes_transferred(); info->ram->normal_bytes = norm_mig_pages_transferred() *
qemu_target_page_size();
info->ram->mbps = s->mbps; info->ram->mbps = s->mbps;
info->ram->dirty_sync_count = s->dirty_sync_count; info->ram->dirty_sync_count = ram_dirty_sync_count();
info->ram->postcopy_requests = s->postcopy_requests; info->ram->postcopy_requests = ram_postcopy_requests();
info->ram->page_size = qemu_target_page_size();
if (s->state != MIGRATION_STATUS_COMPLETED) { if (s->state != MIGRATION_STATUS_COMPLETED) {
info->ram->remaining = ram_bytes_remaining(); info->ram->remaining = ram_bytes_remaining();
info->ram->dirty_pages_rate = s->dirty_pages_rate; info->ram->dirty_pages_rate = ram_dirty_pages_rate();
} }
} }
@ -955,7 +957,7 @@ static void migrate_fd_cleanup(void *opaque)
qemu_bh_delete(s->cleanup_bh); qemu_bh_delete(s->cleanup_bh);
s->cleanup_bh = NULL; s->cleanup_bh = NULL;
flush_page_queue(s); migration_page_queue_free();
if (s->to_dst_file) { if (s->to_dst_file) {
trace_migrate_fd_cleanup(); trace_migrate_fd_cleanup();
@ -1061,21 +1063,21 @@ bool migration_has_failed(MigrationState *s)
s->state == MIGRATION_STATUS_FAILED); s->state == MIGRATION_STATUS_FAILED);
} }
bool migration_in_postcopy(MigrationState *s) bool migration_in_postcopy(void)
{ {
MigrationState *s = migrate_get_current();
return (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); return (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE);
} }
bool migration_in_postcopy_after_devices(MigrationState *s) bool migration_in_postcopy_after_devices(MigrationState *s)
{ {
return migration_in_postcopy(s) && s->postcopy_after_devices; return migration_in_postcopy() && s->postcopy_after_devices;
} }
bool migration_is_idle(MigrationState *s) bool migration_is_idle(void)
{ {
if (!s) { MigrationState *s = migrate_get_current();
s = migrate_get_current();
}
switch (s->state) { switch (s->state) {
case MIGRATION_STATUS_NONE: case MIGRATION_STATUS_NONE:
@ -1116,22 +1118,15 @@ MigrationState *migrate_init(const MigrationParams *params)
s->mbps = 0.0; s->mbps = 0.0;
s->downtime = 0; s->downtime = 0;
s->expected_downtime = 0; s->expected_downtime = 0;
s->dirty_pages_rate = 0;
s->dirty_bytes_rate = 0;
s->setup_time = 0; s->setup_time = 0;
s->dirty_sync_count = 0;
s->start_postcopy = false; s->start_postcopy = false;
s->postcopy_after_devices = false; s->postcopy_after_devices = false;
s->postcopy_requests = 0;
s->migration_thread_running = false; s->migration_thread_running = false;
s->last_req_rb = NULL;
error_free(s->error); error_free(s->error);
s->error = NULL; s->error = NULL;
migrate_set_state(&s->state, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP); migrate_set_state(&s->state, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP);
QSIMPLEQ_INIT(&s->src_page_requests);
s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
return s; return s;
} }
@ -1147,7 +1142,7 @@ int migrate_add_blocker(Error *reason, Error **errp)
return -EACCES; return -EACCES;
} }
if (migration_is_idle(NULL)) { if (migration_is_idle()) {
migration_blockers = g_slist_prepend(migration_blockers, reason); migration_blockers = g_slist_prepend(migration_blockers, reason);
return 0; return 0;
} }
@ -1485,7 +1480,7 @@ static void migrate_handle_rp_req_pages(MigrationState *ms, const char* rbname,
return; return;
} }
if (ram_save_queue_pages(ms, rbname, start, len)) { if (ram_save_queue_pages(rbname, start, len)) {
mark_source_rp_bad(ms); mark_source_rp_bad(ms);
} }
} }
@ -1915,7 +1910,12 @@ static void *migration_thread(void *opaque)
int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST);
int64_t initial_bytes = 0; int64_t initial_bytes = 0;
int64_t max_size = 0; /*
* The final stage happens when the remaining data is smaller than
* this threshold; it's calculated from the requested downtime and
* measured bandwidth
*/
int64_t threshold_size = 0;
int64_t start_time = initial_time; int64_t start_time = initial_time;
int64_t end_time; int64_t end_time;
bool old_vm_running = false; bool old_vm_running = false;
@ -1946,7 +1946,6 @@ static void *migration_thread(void *opaque)
qemu_savevm_state_begin(s->to_dst_file, &s->params); qemu_savevm_state_begin(s->to_dst_file, &s->params);
s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start;
current_active_state = MIGRATION_STATUS_ACTIVE;
migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, migrate_set_state(&s->state, MIGRATION_STATUS_SETUP,
MIGRATION_STATUS_ACTIVE); MIGRATION_STATUS_ACTIVE);
@ -1960,17 +1959,17 @@ static void *migration_thread(void *opaque)
if (!qemu_file_rate_limit(s->to_dst_file)) { if (!qemu_file_rate_limit(s->to_dst_file)) {
uint64_t pend_post, pend_nonpost; uint64_t pend_post, pend_nonpost;
qemu_savevm_state_pending(s->to_dst_file, max_size, &pend_nonpost, qemu_savevm_state_pending(s->to_dst_file, threshold_size,
&pend_post); &pend_nonpost, &pend_post);
pending_size = pend_nonpost + pend_post; pending_size = pend_nonpost + pend_post;
trace_migrate_pending(pending_size, max_size, trace_migrate_pending(pending_size, threshold_size,
pend_post, pend_nonpost); pend_post, pend_nonpost);
if (pending_size && pending_size >= max_size) { if (pending_size && pending_size >= threshold_size) {
/* Still a significant amount to transfer */ /* Still a significant amount to transfer */
if (migrate_postcopy_ram() && if (migrate_postcopy_ram() &&
s->state != MIGRATION_STATUS_POSTCOPY_ACTIVE && s->state != MIGRATION_STATUS_POSTCOPY_ACTIVE &&
pend_nonpost <= max_size && pend_nonpost <= threshold_size &&
atomic_read(&s->start_postcopy)) { atomic_read(&s->start_postcopy)) {
if (!postcopy_start(s, &old_vm_running)) { if (!postcopy_start(s, &old_vm_running)) {
@ -2002,17 +2001,18 @@ static void *migration_thread(void *opaque)
initial_bytes; initial_bytes;
uint64_t time_spent = current_time - initial_time; uint64_t time_spent = current_time - initial_time;
double bandwidth = (double)transferred_bytes / time_spent; double bandwidth = (double)transferred_bytes / time_spent;
max_size = bandwidth * s->parameters.downtime_limit; threshold_size = bandwidth * s->parameters.downtime_limit;
s->mbps = (((double) transferred_bytes * 8.0) / s->mbps = (((double) transferred_bytes * 8.0) /
((double) time_spent / 1000.0)) / 1000.0 / 1000.0; ((double) time_spent / 1000.0)) / 1000.0 / 1000.0;
trace_migrate_transferred(transferred_bytes, time_spent, trace_migrate_transferred(transferred_bytes, time_spent,
bandwidth, max_size); bandwidth, threshold_size);
/* if we haven't sent anything, we don't want to recalculate /* if we haven't sent anything, we don't want to recalculate
10000 is a small enough number for our purposes */ 10000 is a small enough number for our purposes */
if (s->dirty_bytes_rate && transferred_bytes > 10000) { if (ram_dirty_pages_rate() && transferred_bytes > 10000) {
s->expected_downtime = s->dirty_bytes_rate / bandwidth; s->expected_downtime = ram_dirty_pages_rate() *
qemu_target_page_size() / bandwidth;
} }
qemu_file_reset_rate_limit(s->to_dst_file); qemu_file_reset_rate_limit(s->to_dst_file);

14
migration/postcopy-ram.c
View File

@ -123,7 +123,7 @@ bool postcopy_ram_supported_by_host(void)
struct uffdio_range range_struct; struct uffdio_range range_struct;
uint64_t feature_mask; uint64_t feature_mask;
if ((1ul << qemu_target_page_bits()) > pagesize) { if (qemu_target_page_size() > pagesize) {
error_report("Target page size bigger than host page size"); error_report("Target page size bigger than host page size");
goto out; goto out;
} }
@ -213,8 +213,6 @@ out:
static int init_range(const char *block_name, void *host_addr, static int init_range(const char *block_name, void *host_addr,
ram_addr_t offset, ram_addr_t length, void *opaque) ram_addr_t offset, ram_addr_t length, void *opaque)
{ {
MigrationIncomingState *mis = opaque;
trace_postcopy_init_range(block_name, host_addr, offset, length); trace_postcopy_init_range(block_name, host_addr, offset, length);
/* /*
@ -223,7 +221,7 @@ static int init_range(const char *block_name, void *host_addr,
* - we're going to get the copy from the source anyway. * - we're going to get the copy from the source anyway.
* (Precopy will just overwrite this data, so doesn't need the discard) * (Precopy will just overwrite this data, so doesn't need the discard)
*/ */
if (ram_discard_range(mis, block_name, 0, length)) { if (ram_discard_range(block_name, 0, length)) {
return -1; return -1;
} }
@ -271,7 +269,7 @@ static int cleanup_range(const char *block_name, void *host_addr,
*/ */
int postcopy_ram_incoming_init(MigrationIncomingState *mis, size_t ram_pages) int postcopy_ram_incoming_init(MigrationIncomingState *mis, size_t ram_pages)
{ {
if (qemu_ram_foreach_block(init_range, mis)) { if (qemu_ram_foreach_block(init_range, NULL)) {
return -1; return -1;
} }
@ -745,10 +743,10 @@ PostcopyDiscardState *postcopy_discard_send_init(MigrationState *ms,
void postcopy_discard_send_range(MigrationState *ms, PostcopyDiscardState *pds, void postcopy_discard_send_range(MigrationState *ms, PostcopyDiscardState *pds,
unsigned long start, unsigned long length) unsigned long start, unsigned long length)
{ {
size_t tp_bits = qemu_target_page_bits(); size_t tp_size = qemu_target_page_size();
/* Convert to byte offsets within the RAM block */ /* Convert to byte offsets within the RAM block */
pds->start_list[pds->cur_entry] = (start - pds->offset) << tp_bits; pds->start_list[pds->cur_entry] = (start - pds->offset) * tp_size;
pds->length_list[pds->cur_entry] = length << tp_bits; pds->length_list[pds->cur_entry] = length * tp_size;
trace_postcopy_discard_send_range(pds->ramblock_name, start, length); trace_postcopy_discard_send_range(pds->ramblock_name, start, length);
pds->cur_entry++; pds->cur_entry++;
pds->nsentwords++; pds->nsentwords++;

1284
migration/ram.c
View File

File diff suppressed because it is too large Load Diff

19
migration/savevm.c
View File

@ -871,7 +871,7 @@ void qemu_savevm_send_postcopy_advise(QEMUFile *f)
{ {
uint64_t tmp[2]; uint64_t tmp[2];
tmp[0] = cpu_to_be64(ram_pagesize_summary()); tmp[0] = cpu_to_be64(ram_pagesize_summary());
tmp[1] = cpu_to_be64(1ul << qemu_target_page_bits()); tmp[1] = cpu_to_be64(qemu_target_page_size());
trace_qemu_savevm_send_postcopy_advise(); trace_qemu_savevm_send_postcopy_advise();
qemu_savevm_command_send(f, MIG_CMD_POSTCOPY_ADVISE, 16, (uint8_t *)tmp); qemu_savevm_command_send(f, MIG_CMD_POSTCOPY_ADVISE, 16, (uint8_t *)tmp);
@ -1062,7 +1062,7 @@ int qemu_savevm_state_iterate(QEMUFile *f, bool postcopy)
static bool should_send_vmdesc(void) static bool should_send_vmdesc(void)
{ {
MachineState *machine = MACHINE(qdev_get_machine()); MachineState *machine = MACHINE(qdev_get_machine());
bool in_postcopy = migration_in_postcopy(migrate_get_current()); bool in_postcopy = migration_in_postcopy();
return !machine->suppress_vmdesc && !in_postcopy; return !machine->suppress_vmdesc && !in_postcopy;
} }
@ -1111,7 +1111,7 @@ void qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only)
int vmdesc_len; int vmdesc_len;
SaveStateEntry *se; SaveStateEntry *se;
int ret; int ret;
bool in_postcopy = migration_in_postcopy(migrate_get_current()); bool in_postcopy = migration_in_postcopy();
trace_savevm_state_complete_precopy(); trace_savevm_state_complete_precopy();
@ -1197,7 +1197,7 @@ void qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only)
* the result is split into the amount for units that can and * the result is split into the amount for units that can and
* for units that can't do postcopy. * for units that can't do postcopy.
*/ */
void qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size, void qemu_savevm_state_pending(QEMUFile *f, uint64_t threshold_size,
uint64_t *res_non_postcopiable, uint64_t *res_non_postcopiable,
uint64_t *res_postcopiable) uint64_t *res_postcopiable)
{ {
@ -1216,7 +1216,7 @@ void qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size,
continue; continue;
} }
} }
se->ops->save_live_pending(f, se->opaque, max_size, se->ops->save_live_pending(f, se->opaque, threshold_size,
res_non_postcopiable, res_postcopiable); res_non_postcopiable, res_postcopiable);
} }
} }
@ -1390,13 +1390,13 @@ static int loadvm_postcopy_handle_advise(MigrationIncomingState *mis)
} }
remote_tps = qemu_get_be64(mis->from_src_file); remote_tps = qemu_get_be64(mis->from_src_file);
if (remote_tps != (1ul << qemu_target_page_bits())) { if (remote_tps != qemu_target_page_size()) {
/* /*
* Again, some differences could be dealt with, but for now keep it * Again, some differences could be dealt with, but for now keep it
* simple. * simple.
*/ */
error_report("Postcopy needs matching target page sizes (s=%d d=%d)", error_report("Postcopy needs matching target page sizes (s=%d d=%zd)",
(int)remote_tps, 1 << qemu_target_page_bits()); (int)remote_tps, qemu_target_page_size());
return -1; return -1;
} }
@ -1479,8 +1479,7 @@ static int loadvm_postcopy_ram_handle_discard(MigrationIncomingState *mis,
block_length = qemu_get_be64(mis->from_src_file); block_length = qemu_get_be64(mis->from_src_file);
len -= 16; len -= 16;
int ret = ram_discard_range(mis, ramid, start_addr, int ret = ram_discard_range(ramid, start_addr, block_length);
block_length);
if (ret) { if (ret) {
return ret; return ret;
} }

4
migration/trace-events
View File

@ -63,8 +63,8 @@ put_qtailq_end(const char *name, const char *reason) "%s %s"
qemu_file_fclose(void) "" qemu_file_fclose(void) ""
# migration/ram.c # migration/ram.c
get_queued_page(const char *block_name, uint64_t tmp_offset, uint64_t ram_addr) "%s/%" PRIx64 " ram_addr=%" PRIx64 get_queued_page(const char *block_name, uint64_t tmp_offset, unsigned long page_abs) "%s/%" PRIx64 " page_abs=%lx"
get_queued_page_not_dirty(const char *block_name, uint64_t tmp_offset, uint64_t ram_addr, int sent) "%s/%" PRIx64 " ram_addr=%" PRIx64 " (sent=%d)" get_queued_page_not_dirty(const char *block_name, uint64_t tmp_offset, unsigned long page_abs, int sent) "%s/%" PRIx64 " page_abs=%lx (sent=%d)"
migration_bitmap_sync_start(void) "" migration_bitmap_sync_start(void) ""
migration_bitmap_sync_end(uint64_t dirty_pages) "dirty_pages %" PRIu64 migration_bitmap_sync_end(uint64_t dirty_pages) "dirty_pages %" PRIu64
migration_throttle(void) "" migration_throttle(void) ""

5
qapi-schema.json
View File

@ -598,6 +598,9 @@
# @postcopy-requests: The number of page requests received from the destination # @postcopy-requests: The number of page requests received from the destination
# (since 2.7) # (since 2.7)
# #
# @page-size: The number of bytes per page for the various page-based
# statistics (since 2.10)
#
# Since: 0.14.0 # Since: 0.14.0
## ##
{ 'struct': 'MigrationStats', { 'struct': 'MigrationStats',
@ -605,7 +608,7 @@
'duplicate': 'int', 'skipped': 'int', 'normal': 'int', 'duplicate': 'int', 'skipped': 'int', 'normal': 'int',
'normal-bytes': 'int', 'dirty-pages-rate' : 'int', 'normal-bytes': 'int', 'dirty-pages-rate' : 'int',
'mbps' : 'number', 'dirty-sync-count' : 'int', 'mbps' : 'number', 'dirty-sync-count' : 'int',
'postcopy-requests' : 'int' } } 'postcopy-requests' : 'int', 'page-size' : 'int' } }
## ##
# @XBZRLECacheStats: # @XBZRLECacheStats:

45
qdev-monitor.c
View File

@ -29,6 +29,7 @@
#include "qemu/error-report.h" #include "qemu/error-report.h"
#include "qemu/help_option.h" #include "qemu/help_option.h"
#include "sysemu/block-backend.h" #include "sysemu/block-backend.h"
#include "migration/migration.h"
/* /*
* Aliases were a bad idea from the start. Let's keep them * Aliases were a bad idea from the start. Let's keep them
@ -603,6 +604,11 @@ DeviceState *qdev_device_add(QemuOpts *opts, Error **errp)
return NULL; return NULL;
} }
if (!migration_is_idle()) {
error_setg(errp, "device_add not allowed while migrating");
return NULL;
}
/* create device */ /* create device */
dev = DEVICE(object_new(driver)); dev = DEVICE(object_new(driver));
@ -836,6 +842,45 @@ static DeviceState *find_device_state(const char *id, Error **errp)
return DEVICE(obj); return DEVICE(obj);
} }
void qdev_unplug(DeviceState *dev, Error **errp)
{
DeviceClass *dc = DEVICE_GET_CLASS(dev);
HotplugHandler *hotplug_ctrl;
HotplugHandlerClass *hdc;
if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
error_setg(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
return;
}
if (!dc->hotpluggable) {
error_setg(errp, QERR_DEVICE_NO_HOTPLUG,
object_get_typename(OBJECT(dev)));
return;
}
if (!migration_is_idle()) {
error_setg(errp, "device_del not allowed while migrating");
return;
}
qdev_hot_removed = true;
hotplug_ctrl = qdev_get_hotplug_handler(dev);
/* hotpluggable device MUST have HotplugHandler, if it doesn't
* then something is very wrong with it */
g_assert(hotplug_ctrl);
/* If device supports async unplug just request it to be done,
* otherwise just remove it synchronously */
hdc = HOTPLUG_HANDLER_GET_CLASS(hotplug_ctrl);
if (hdc->unplug_request) {
hotplug_handler_unplug_request(hotplug_ctrl, dev, errp);
} else {
hotplug_handler_unplug(hotplug_ctrl, dev, errp);
}
}
void qmp_device_del(const char *id, Error **errp) void qmp_device_del(const char *id, Error **errp)
{ {
DeviceState *dev = find_device_state(id, errp); DeviceState *dev = find_device_state(id, errp);