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qemu/migration/options.c
Steve Sistare 624e6e654e migration: cpr-transfer mode 
Add the cpr-transfer migration mode, which allows the user to transfer
a guest to a new QEMU instance on the same host with minimal guest pause
time, by preserving guest RAM in place, albeit with new virtual addresses
in new QEMU, and by preserving device file descriptors.  Pages that were
locked in memory for DMA in old QEMU remain locked in new QEMU, because the
descriptor of the device that locked them remains open.

cpr-transfer preserves memory and devices descriptors by sending them to
new QEMU over a unix domain socket using SCM_RIGHTS.  Such CPR state cannot
be sent over the normal migration channel, because devices and backends
are created prior to reading the channel, so this mode sends CPR state
over a second "cpr" migration channel.  New QEMU reads the cpr channel
prior to creating devices or backends.  The user specifies the cpr channel
in the channel arguments on the outgoing side, and in a second -incoming
command-line parameter on the incoming side.

The user must start old QEMU with the the '-machine aux-ram-share=on' option,
which allows anonymous memory to be transferred in place to the new process
by transferring a memory descriptor for each ram block.  Memory-backend
objects must have the share=on attribute, but memory-backend-epc is not
supported.

The user starts new QEMU on the same host as old QEMU, with command-line
arguments to create the same machine, plus the -incoming option for the
main migration channel, like normal live migration.  In addition, the user
adds a second -incoming option with channel type "cpr".  This CPR channel
must support file descriptor transfer with SCM_RIGHTS, i.e. it must be a
UNIX domain socket.

To initiate CPR, the user issues a migrate command to old QEMU, adding
a second migration channel of type "cpr" in the channels argument.
Old QEMU stops the VM, saves state to the migration channels, and enters
the postmigrate state.  New QEMU mmap's memory descriptors, and execution
resumes.

The implementation splits qmp_migrate into start and finish functions.
Start sends CPR state to new QEMU, which responds by closing the CPR
channel.  Old QEMU detects the HUP then calls finish, which connects the
main migration channel.

In summary, the usage is:

  qemu-system-$arch -machine aux-ram-share=on ...

  start new QEMU with "-incoming <main-uri> -incoming <cpr-channel>"

  Issue commands to old QEMU:
    migrate_set_parameter mode cpr-transfer

    {"execute": "migrate", ...
        {"channel-type": "main"...}, {"channel-type": "cpr"...} ... }

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Link: https://lore.kernel.org/r/1736967650-129648-17-git-send-email-steven.sistare@oracle.com
Signed-off-by: Fabiano Rosas <farosas@suse.de>
2025-01-29 11:56:24 -03:00

1428 lines
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/*
* QEMU migration capabilities
*
* Copyright (c) 2012-2023 Red Hat Inc
*
* Authors:
* Orit Wasserman <owasserm@redhat.com>
* Juan Quintela <quintela@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/error-report.h"
#include "exec/target_page.h"
#include "qapi/clone-visitor.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-migration.h"
#include "qapi/qapi-visit-migration.h"
#include "qapi/qmp/qerror.h"
#include "qapi/qmp/qnull.h"
#include "system/runstate.h"
#include "migration/colo.h"
#include "migration/cpr.h"
#include "migration/misc.h"
#include "migration.h"
#include "migration-stats.h"
#include "qemu-file.h"
#include "ram.h"
#include "options.h"
#include "system/kvm.h"
/* Maximum migrate downtime set to 2000 seconds */
#define MAX_MIGRATE_DOWNTIME_SECONDS 2000
#define MAX_MIGRATE_DOWNTIME (MAX_MIGRATE_DOWNTIME_SECONDS * 1000)
#define MAX_THROTTLE (128 << 20) /* Migration transfer speed throttling */
/* Time in milliseconds we are allowed to stop the source,
* for sending the last part */
#define DEFAULT_MIGRATE_SET_DOWNTIME 300
/* Define default autoconverge cpu throttle migration parameters */
#define DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD 50
#define DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL 20
#define DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT 10
#define DEFAULT_MIGRATE_MAX_CPU_THROTTLE 99
/* Migration XBZRLE default cache size */
#define DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE (64 * 1024 * 1024)
/* The delay time (in ms) between two COLO checkpoints */
#define DEFAULT_MIGRATE_X_CHECKPOINT_DELAY (200 * 100)
#define DEFAULT_MIGRATE_MULTIFD_CHANNELS 2
#define DEFAULT_MIGRATE_MULTIFD_COMPRESSION MULTIFD_COMPRESSION_NONE
/* 0: means nocompress, 1: best speed, ... 9: best compress ratio */
#define DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL 1
/*
* 1: best speed, ... 9: best compress ratio
* There is some nuance here. Refer to QATzip documentation to understand
* the mapping of QATzip levels to standard deflate levels.
*/
#define DEFAULT_MIGRATE_MULTIFD_QATZIP_LEVEL 1
/* 0: means nocompress, 1: best speed, ... 20: best compress ratio */
#define DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL 1
/* Background transfer rate for postcopy, 0 means unlimited, note
* that page requests can still exceed this limit.
*/
#define DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH 0
/*
* Parameters for self_announce_delay giving a stream of RARP/ARP
* packets after migration.
*/
#define DEFAULT_MIGRATE_ANNOUNCE_INITIAL 50
#define DEFAULT_MIGRATE_ANNOUNCE_MAX 550
#define DEFAULT_MIGRATE_ANNOUNCE_ROUNDS 5
#define DEFAULT_MIGRATE_ANNOUNCE_STEP 100
#define DEFINE_PROP_MIG_CAP(name, x) \
DEFINE_PROP_BOOL(name, MigrationState, capabilities[x], false)
#define DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD 1000 /* milliseconds */
#define DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT 1 /* MB/s */
const Property migration_properties[] = {
DEFINE_PROP_BOOL("store-global-state", MigrationState,
store_global_state, true),
DEFINE_PROP_BOOL("send-configuration", MigrationState,
send_configuration, true),
DEFINE_PROP_BOOL("send-section-footer", MigrationState,
send_section_footer, true),
DEFINE_PROP_BOOL("multifd-flush-after-each-section", MigrationState,
multifd_flush_after_each_section, false),
DEFINE_PROP_UINT8("x-clear-bitmap-shift", MigrationState,
clear_bitmap_shift, CLEAR_BITMAP_SHIFT_DEFAULT),
DEFINE_PROP_BOOL("x-preempt-pre-7-2", MigrationState,
preempt_pre_7_2, false),
/* Migration parameters */
DEFINE_PROP_UINT8("x-throttle-trigger-threshold", MigrationState,
parameters.throttle_trigger_threshold,
DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD),
DEFINE_PROP_UINT8("x-cpu-throttle-initial", MigrationState,
parameters.cpu_throttle_initial,
DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL),
DEFINE_PROP_UINT8("x-cpu-throttle-increment", MigrationState,
parameters.cpu_throttle_increment,
DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT),
DEFINE_PROP_BOOL("x-cpu-throttle-tailslow", MigrationState,
parameters.cpu_throttle_tailslow, false),
DEFINE_PROP_SIZE("x-max-bandwidth", MigrationState,
parameters.max_bandwidth, MAX_THROTTLE),
DEFINE_PROP_SIZE("avail-switchover-bandwidth", MigrationState,
parameters.avail_switchover_bandwidth, 0),
DEFINE_PROP_UINT64("x-downtime-limit", MigrationState,
parameters.downtime_limit,
DEFAULT_MIGRATE_SET_DOWNTIME),
DEFINE_PROP_UINT32("x-checkpoint-delay", MigrationState,
parameters.x_checkpoint_delay,
DEFAULT_MIGRATE_X_CHECKPOINT_DELAY),
DEFINE_PROP_UINT8("multifd-channels", MigrationState,
parameters.multifd_channels,
DEFAULT_MIGRATE_MULTIFD_CHANNELS),
DEFINE_PROP_MULTIFD_COMPRESSION("multifd-compression", MigrationState,
parameters.multifd_compression,
DEFAULT_MIGRATE_MULTIFD_COMPRESSION),
DEFINE_PROP_UINT8("multifd-zlib-level", MigrationState,
parameters.multifd_zlib_level,
DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL),
DEFINE_PROP_UINT8("multifd-qatzip-level", MigrationState,
parameters.multifd_qatzip_level,
DEFAULT_MIGRATE_MULTIFD_QATZIP_LEVEL),
DEFINE_PROP_UINT8("multifd-zstd-level", MigrationState,
parameters.multifd_zstd_level,
DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL),
DEFINE_PROP_SIZE("xbzrle-cache-size", MigrationState,
parameters.xbzrle_cache_size,
DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE),
DEFINE_PROP_SIZE("max-postcopy-bandwidth", MigrationState,
parameters.max_postcopy_bandwidth,
DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH),
DEFINE_PROP_UINT8("max-cpu-throttle", MigrationState,
parameters.max_cpu_throttle,
DEFAULT_MIGRATE_MAX_CPU_THROTTLE),
DEFINE_PROP_SIZE("announce-initial", MigrationState,
parameters.announce_initial,
DEFAULT_MIGRATE_ANNOUNCE_INITIAL),
DEFINE_PROP_SIZE("announce-max", MigrationState,
parameters.announce_max,
DEFAULT_MIGRATE_ANNOUNCE_MAX),
DEFINE_PROP_SIZE("announce-rounds", MigrationState,
parameters.announce_rounds,
DEFAULT_MIGRATE_ANNOUNCE_ROUNDS),
DEFINE_PROP_SIZE("announce-step", MigrationState,
parameters.announce_step,
DEFAULT_MIGRATE_ANNOUNCE_STEP),
DEFINE_PROP_STRING("tls-creds", MigrationState, parameters.tls_creds),
DEFINE_PROP_STRING("tls-hostname", MigrationState, parameters.tls_hostname),
DEFINE_PROP_STRING("tls-authz", MigrationState, parameters.tls_authz),
DEFINE_PROP_UINT64("x-vcpu-dirty-limit-period", MigrationState,
parameters.x_vcpu_dirty_limit_period,
DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD),
DEFINE_PROP_UINT64("vcpu-dirty-limit", MigrationState,
parameters.vcpu_dirty_limit,
DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT),
DEFINE_PROP_MIG_MODE("mode", MigrationState,
parameters.mode,
MIG_MODE_NORMAL),
DEFINE_PROP_ZERO_PAGE_DETECTION("zero-page-detection", MigrationState,
parameters.zero_page_detection,
ZERO_PAGE_DETECTION_MULTIFD),
/* Migration capabilities */
DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE),
DEFINE_PROP_MIG_CAP("x-rdma-pin-all", MIGRATION_CAPABILITY_RDMA_PIN_ALL),
DEFINE_PROP_MIG_CAP("x-auto-converge", MIGRATION_CAPABILITY_AUTO_CONVERGE),
DEFINE_PROP_MIG_CAP("x-zero-blocks", MIGRATION_CAPABILITY_ZERO_BLOCKS),
DEFINE_PROP_MIG_CAP("x-events", MIGRATION_CAPABILITY_EVENTS),
DEFINE_PROP_MIG_CAP("x-postcopy-ram", MIGRATION_CAPABILITY_POSTCOPY_RAM),
DEFINE_PROP_MIG_CAP("x-postcopy-preempt",
MIGRATION_CAPABILITY_POSTCOPY_PREEMPT),
DEFINE_PROP_MIG_CAP("x-colo", MIGRATION_CAPABILITY_X_COLO),
DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM),
DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH),
DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_MULTIFD),
DEFINE_PROP_MIG_CAP("x-background-snapshot",
MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT),
#ifdef CONFIG_LINUX
DEFINE_PROP_MIG_CAP("x-zero-copy-send",
MIGRATION_CAPABILITY_ZERO_COPY_SEND),
#endif
DEFINE_PROP_MIG_CAP("x-switchover-ack",
MIGRATION_CAPABILITY_SWITCHOVER_ACK),
DEFINE_PROP_MIG_CAP("x-dirty-limit", MIGRATION_CAPABILITY_DIRTY_LIMIT),
DEFINE_PROP_MIG_CAP("mapped-ram", MIGRATION_CAPABILITY_MAPPED_RAM),
};
const size_t migration_properties_count = ARRAY_SIZE(migration_properties);
bool migrate_auto_converge(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE];
}
bool migrate_background_snapshot(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT];
}
bool migrate_colo(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_X_COLO];
}
bool migrate_dirty_bitmaps(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS];
}
bool migrate_dirty_limit(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_DIRTY_LIMIT];
}
bool migrate_events(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_EVENTS];
}
bool migrate_mapped_ram(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_MAPPED_RAM];
}
bool migrate_ignore_shared(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED];
}
bool migrate_late_block_activate(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE];
}
bool migrate_multifd(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_MULTIFD];
}
bool migrate_pause_before_switchover(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER];
}
bool migrate_postcopy_blocktime(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME];
}
bool migrate_postcopy_preempt(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT];
}
bool migrate_postcopy_ram(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM];
}
bool migrate_rdma_pin_all(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_RDMA_PIN_ALL];
}
bool migrate_release_ram(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_RELEASE_RAM];
}
bool migrate_return_path(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_RETURN_PATH];
}
bool migrate_switchover_ack(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_SWITCHOVER_ACK];
}
bool migrate_validate_uuid(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID];
}
bool migrate_xbzrle(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_XBZRLE];
}
bool migrate_zero_copy_send(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_ZERO_COPY_SEND];
}
/* pseudo capabilities */
bool migrate_multifd_flush_after_each_section(void)
{
MigrationState *s = migrate_get_current();
return s->multifd_flush_after_each_section;
}
bool migrate_postcopy(void)
{
return migrate_postcopy_ram() || migrate_dirty_bitmaps();
}
bool migrate_rdma(void)
{
MigrationState *s = migrate_get_current();
return s->rdma_migration;
}
bool migrate_tls(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.tls_creds && *s->parameters.tls_creds;
}
typedef enum WriteTrackingSupport {
WT_SUPPORT_UNKNOWN = 0,
WT_SUPPORT_ABSENT,
WT_SUPPORT_AVAILABLE,
WT_SUPPORT_COMPATIBLE
} WriteTrackingSupport;
static
WriteTrackingSupport migrate_query_write_tracking(void)
{
/* Check if kernel supports required UFFD features */
if (!ram_write_tracking_available()) {
return WT_SUPPORT_ABSENT;
}
/*
* Check if current memory configuration is
* compatible with required UFFD features.
*/
if (!ram_write_tracking_compatible()) {
return WT_SUPPORT_AVAILABLE;
}
return WT_SUPPORT_COMPATIBLE;
}
/* Migration capabilities set */
struct MigrateCapsSet {
int size; /* Capability set size */
MigrationCapability caps[]; /* Variadic array of capabilities */
};
typedef struct MigrateCapsSet MigrateCapsSet;
/* Define and initialize MigrateCapsSet */
#define INITIALIZE_MIGRATE_CAPS_SET(_name, ...) \
MigrateCapsSet _name = { \
.size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \
.caps = { __VA_ARGS__ } \
}
/* Background-snapshot compatibility check list */
static const
INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot,
MIGRATION_CAPABILITY_POSTCOPY_RAM,
MIGRATION_CAPABILITY_DIRTY_BITMAPS,
MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME,
MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE,
MIGRATION_CAPABILITY_RETURN_PATH,
MIGRATION_CAPABILITY_MULTIFD,
MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER,
MIGRATION_CAPABILITY_AUTO_CONVERGE,
MIGRATION_CAPABILITY_RELEASE_RAM,
MIGRATION_CAPABILITY_RDMA_PIN_ALL,
MIGRATION_CAPABILITY_XBZRLE,
MIGRATION_CAPABILITY_X_COLO,
MIGRATION_CAPABILITY_VALIDATE_UUID,
MIGRATION_CAPABILITY_ZERO_COPY_SEND);
static bool migrate_incoming_started(void)
{
return !!migration_incoming_get_current()->transport_data;
}
/**
* @migration_caps_check - check capability compatibility
*
* @old_caps: old capability list
* @new_caps: new capability list
* @errp: set *errp if the check failed, with reason
*
* Returns true if check passed, otherwise false.
*/
bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp)
{
ERRP_GUARD();
MigrationIncomingState *mis = migration_incoming_get_current();
if (new_caps[MIGRATION_CAPABILITY_ZERO_BLOCKS]) {
warn_report("zero-blocks capability is deprecated");
}
#ifndef CONFIG_REPLICATION
if (new_caps[MIGRATION_CAPABILITY_X_COLO]) {
error_setg(errp, "QEMU compiled without replication module"
" can't enable COLO");
error_append_hint(errp, "Please enable replication before COLO.\n");
return false;
}
#endif
if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) {
/* This check is reasonably expensive, so only when it's being
* set the first time, also it's only the destination that needs
* special support.
*/
if (!old_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM] &&
runstate_check(RUN_STATE_INMIGRATE) &&
!postcopy_ram_supported_by_host(mis, errp)) {
error_prepend(errp, "Postcopy is not supported: ");
return false;
}
if (new_caps[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) {
error_setg(errp, "Postcopy is not compatible with ignore-shared");
return false;
}
if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) {
error_setg(errp, "Postcopy is not yet compatible with multifd");
return false;
}
}
if (new_caps[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) {
WriteTrackingSupport wt_support;
int idx;
/*
* Check if 'background-snapshot' capability is supported by
* host kernel and compatible with guest memory configuration.
*/
wt_support = migrate_query_write_tracking();
if (wt_support < WT_SUPPORT_AVAILABLE) {
error_setg(errp, "Background-snapshot is not supported by host kernel");
return false;
}
if (wt_support < WT_SUPPORT_COMPATIBLE) {
error_setg(errp, "Background-snapshot is not compatible "
"with guest memory configuration");
return false;
}
/*
* Check if there are any migration capabilities
* incompatible with 'background-snapshot'.
*/
for (idx = 0; idx < check_caps_background_snapshot.size; idx++) {
int incomp_cap = check_caps_background_snapshot.caps[idx];
if (new_caps[incomp_cap]) {
error_setg(errp,
"Background-snapshot is not compatible with %s",
MigrationCapability_str(incomp_cap));
return false;
}
}
}
#ifdef CONFIG_LINUX
if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND] &&
(!new_caps[MIGRATION_CAPABILITY_MULTIFD] ||
new_caps[MIGRATION_CAPABILITY_XBZRLE] ||
migrate_multifd_compression() ||
migrate_tls())) {
error_setg(errp,
"Zero copy only available for non-compressed non-TLS multifd migration");
return false;
}
#else
if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND]) {
error_setg(errp,
"Zero copy currently only available on Linux");
return false;
}
#endif
if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]) {
if (!new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) {
error_setg(errp, "Postcopy preempt requires postcopy-ram");
return false;
}
if (migrate_incoming_started()) {
error_setg(errp,
"Postcopy preempt must be set before incoming starts");
return false;
}
}
if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) {
if (migrate_incoming_started()) {
error_setg(errp, "Multifd must be set before incoming starts");
return false;
}
}
if (new_caps[MIGRATION_CAPABILITY_SWITCHOVER_ACK]) {
if (!new_caps[MIGRATION_CAPABILITY_RETURN_PATH]) {
error_setg(errp, "Capability 'switchover-ack' requires capability "
"'return-path'");
return false;
}
}
if (new_caps[MIGRATION_CAPABILITY_DIRTY_LIMIT]) {
if (new_caps[MIGRATION_CAPABILITY_AUTO_CONVERGE]) {
error_setg(errp, "dirty-limit conflicts with auto-converge"
" either of then available currently");
return false;
}
if (!kvm_enabled() || !kvm_dirty_ring_enabled()) {
error_setg(errp, "dirty-limit requires KVM with accelerator"
" property 'dirty-ring-size' set");
return false;
}
}
if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) {
if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) {
error_setg(errp, "Multifd is not compatible with xbzrle");
return false;
}
}
if (new_caps[MIGRATION_CAPABILITY_MAPPED_RAM]) {
if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) {
error_setg(errp,
"Mapped-ram migration is incompatible with xbzrle");
return false;
}
if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) {
error_setg(errp,
"Mapped-ram migration is incompatible with postcopy");
return false;
}
}
return true;
}
MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp)
{
MigrationCapabilityStatusList *head = NULL, **tail = &head;
MigrationCapabilityStatus *caps;
MigrationState *s = migrate_get_current();
int i;
for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) {
caps = g_malloc0(sizeof(*caps));
caps->capability = i;
caps->state = s->capabilities[i];
QAPI_LIST_APPEND(tail, caps);
}
return head;
}
void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
Error **errp)
{
MigrationState *s = migrate_get_current();
MigrationCapabilityStatusList *cap;
bool new_caps[MIGRATION_CAPABILITY__MAX];
if (migration_is_running() || migration_in_colo_state()) {
error_setg(errp, "There's a migration process in progress");
return;
}
memcpy(new_caps, s->capabilities, sizeof(new_caps));
for (cap = params; cap; cap = cap->next) {
new_caps[cap->value->capability] = cap->value->state;
}
if (!migrate_caps_check(s->capabilities, new_caps, errp)) {
return;
}
for (cap = params; cap; cap = cap->next) {
s->capabilities[cap->value->capability] = cap->value->state;
}
}
/* parameters */
const BitmapMigrationNodeAliasList *migrate_block_bitmap_mapping(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.block_bitmap_mapping;
}
bool migrate_has_block_bitmap_mapping(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.has_block_bitmap_mapping;
}
uint32_t migrate_checkpoint_delay(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.x_checkpoint_delay;
}
uint8_t migrate_cpu_throttle_increment(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.cpu_throttle_increment;
}
uint8_t migrate_cpu_throttle_initial(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.cpu_throttle_initial;
}
bool migrate_cpu_throttle_tailslow(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.cpu_throttle_tailslow;
}
bool migrate_direct_io(void)
{
MigrationState *s = migrate_get_current();
/*
* O_DIRECT is only supported with mapped-ram and multifd.
*
* mapped-ram is needed because filesystems impose restrictions on
* O_DIRECT IO alignment (see MAPPED_RAM_FILE_OFFSET_ALIGNMENT).
*
* multifd is needed to keep the unaligned portion of the stream
* isolated to the main migration thread while multifd channels
* process the aligned data with O_DIRECT enabled.
*/
return s->parameters.direct_io &&
s->capabilities[MIGRATION_CAPABILITY_MAPPED_RAM] &&
s->capabilities[MIGRATION_CAPABILITY_MULTIFD];
}
uint64_t migrate_downtime_limit(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.downtime_limit;
}
uint8_t migrate_max_cpu_throttle(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.max_cpu_throttle;
}
uint64_t migrate_max_bandwidth(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.max_bandwidth;
}
uint64_t migrate_avail_switchover_bandwidth(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.avail_switchover_bandwidth;
}
uint64_t migrate_max_postcopy_bandwidth(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.max_postcopy_bandwidth;
}
MigMode migrate_mode(void)
{
MigMode mode = cpr_get_incoming_mode();
if (mode == MIG_MODE_NONE) {
mode = migrate_get_current()->parameters.mode;
}
assert(mode >= 0 && mode < MIG_MODE__MAX);
return mode;
}
int migrate_multifd_channels(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.multifd_channels;
}
MultiFDCompression migrate_multifd_compression(void)
{
MigrationState *s = migrate_get_current();
assert(s->parameters.multifd_compression < MULTIFD_COMPRESSION__MAX);
return s->parameters.multifd_compression;
}
int migrate_multifd_zlib_level(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.multifd_zlib_level;
}
int migrate_multifd_qatzip_level(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.multifd_qatzip_level;
}
int migrate_multifd_zstd_level(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.multifd_zstd_level;
}
uint8_t migrate_throttle_trigger_threshold(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.throttle_trigger_threshold;
}
const char *migrate_tls_authz(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.tls_authz;
}
const char *migrate_tls_creds(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.tls_creds;
}
const char *migrate_tls_hostname(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.tls_hostname;
}
uint64_t migrate_vcpu_dirty_limit_period(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.x_vcpu_dirty_limit_period;
}
uint64_t migrate_xbzrle_cache_size(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.xbzrle_cache_size;
}
ZeroPageDetection migrate_zero_page_detection(void)
{
MigrationState *s = migrate_get_current();
return s->parameters.zero_page_detection;
}
/* parameters helpers */
AnnounceParameters *migrate_announce_params(void)
{
static AnnounceParameters ap;
MigrationState *s = migrate_get_current();
ap.initial = s->parameters.announce_initial;
ap.max = s->parameters.announce_max;
ap.rounds = s->parameters.announce_rounds;
ap.step = s->parameters.announce_step;
return &ap;
}
MigrationParameters *qmp_query_migrate_parameters(Error **errp)
{
MigrationParameters *params;
MigrationState *s = migrate_get_current();
/* TODO use QAPI_CLONE() instead of duplicating it inline */
params = g_malloc0(sizeof(*params));
params->has_throttle_trigger_threshold = true;
params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold;
params->has_cpu_throttle_initial = true;
params->cpu_throttle_initial = s->parameters.cpu_throttle_initial;
params->has_cpu_throttle_increment = true;
params->cpu_throttle_increment = s->parameters.cpu_throttle_increment;
params->has_cpu_throttle_tailslow = true;
params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow;
params->tls_creds = g_strdup(s->parameters.tls_creds);
params->tls_hostname = g_strdup(s->parameters.tls_hostname);
params->tls_authz = g_strdup(s->parameters.tls_authz ?
s->parameters.tls_authz : "");
params->has_max_bandwidth = true;
params->max_bandwidth = s->parameters.max_bandwidth;
params->has_avail_switchover_bandwidth = true;
params->avail_switchover_bandwidth = s->parameters.avail_switchover_bandwidth;
params->has_downtime_limit = true;
params->downtime_limit = s->parameters.downtime_limit;
params->has_x_checkpoint_delay = true;
params->x_checkpoint_delay = s->parameters.x_checkpoint_delay;
params->has_multifd_channels = true;
params->multifd_channels = s->parameters.multifd_channels;
params->has_multifd_compression = true;
params->multifd_compression = s->parameters.multifd_compression;
params->has_multifd_zlib_level = true;
params->multifd_zlib_level = s->parameters.multifd_zlib_level;
params->has_multifd_qatzip_level = true;
params->multifd_qatzip_level = s->parameters.multifd_qatzip_level;
params->has_multifd_zstd_level = true;
params->multifd_zstd_level = s->parameters.multifd_zstd_level;
params->has_xbzrle_cache_size = true;
params->xbzrle_cache_size = s->parameters.xbzrle_cache_size;
params->has_max_postcopy_bandwidth = true;
params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth;
params->has_max_cpu_throttle = true;
params->max_cpu_throttle = s->parameters.max_cpu_throttle;
params->has_announce_initial = true;
params->announce_initial = s->parameters.announce_initial;
params->has_announce_max = true;
params->announce_max = s->parameters.announce_max;
params->has_announce_rounds = true;
params->announce_rounds = s->parameters.announce_rounds;
params->has_announce_step = true;
params->announce_step = s->parameters.announce_step;
if (s->parameters.has_block_bitmap_mapping) {
params->has_block_bitmap_mapping = true;
params->block_bitmap_mapping =
QAPI_CLONE(BitmapMigrationNodeAliasList,
s->parameters.block_bitmap_mapping);
}
params->has_x_vcpu_dirty_limit_period = true;
params->x_vcpu_dirty_limit_period = s->parameters.x_vcpu_dirty_limit_period;
params->has_vcpu_dirty_limit = true;
params->vcpu_dirty_limit = s->parameters.vcpu_dirty_limit;
params->has_mode = true;
params->mode = s->parameters.mode;
params->has_zero_page_detection = true;
params->zero_page_detection = s->parameters.zero_page_detection;
params->has_direct_io = true;
params->direct_io = s->parameters.direct_io;
return params;
}
void migrate_params_init(MigrationParameters *params)
{
params->tls_hostname = g_strdup("");
params->tls_creds = g_strdup("");
/* Set has_* up only for parameter checks */
params->has_throttle_trigger_threshold = true;
params->has_cpu_throttle_initial = true;
params->has_cpu_throttle_increment = true;
params->has_cpu_throttle_tailslow = true;
params->has_max_bandwidth = true;
params->has_downtime_limit = true;
params->has_x_checkpoint_delay = true;
params->has_multifd_channels = true;
params->has_multifd_compression = true;
params->has_multifd_zlib_level = true;
params->has_multifd_qatzip_level = true;
params->has_multifd_zstd_level = true;
params->has_xbzrle_cache_size = true;
params->has_max_postcopy_bandwidth = true;
params->has_max_cpu_throttle = true;
params->has_announce_initial = true;
params->has_announce_max = true;
params->has_announce_rounds = true;
params->has_announce_step = true;
params->has_x_vcpu_dirty_limit_period = true;
params->has_vcpu_dirty_limit = true;
params->has_mode = true;
params->has_zero_page_detection = true;
params->has_direct_io = true;
}
/*
* Check whether the parameters are valid. Error will be put into errp
* (if provided). Return true if valid, otherwise false.
*/
bool migrate_params_check(MigrationParameters *params, Error **errp)
{
ERRP_GUARD();
if (params->has_throttle_trigger_threshold &&
(params->throttle_trigger_threshold < 1 ||
params->throttle_trigger_threshold > 100)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"throttle_trigger_threshold",
"an integer in the range of 1 to 100");
return false;
}
if (params->has_cpu_throttle_initial &&
(params->cpu_throttle_initial < 1 ||
params->cpu_throttle_initial > 99)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"cpu_throttle_initial",
"an integer in the range of 1 to 99");
return false;
}
if (params->has_cpu_throttle_increment &&
(params->cpu_throttle_increment < 1 ||
params->cpu_throttle_increment > 99)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"cpu_throttle_increment",
"an integer in the range of 1 to 99");
return false;
}
if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"max_bandwidth",
"an integer in the range of 0 to "stringify(SIZE_MAX)
" bytes/second");
return false;
}
if (params->has_avail_switchover_bandwidth &&
(params->avail_switchover_bandwidth > SIZE_MAX)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"avail_switchover_bandwidth",
"an integer in the range of 0 to "stringify(SIZE_MAX)
" bytes/second");
return false;
}
if (params->has_downtime_limit &&
(params->downtime_limit > MAX_MIGRATE_DOWNTIME)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"downtime_limit",
"an integer in the range of 0 to "
stringify(MAX_MIGRATE_DOWNTIME)" ms");
return false;
}
/* x_checkpoint_delay is now always positive */
if (params->has_multifd_channels && (params->multifd_channels < 1)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"multifd_channels",
"a value between 1 and 255");
return false;
}
if (params->has_multifd_zlib_level &&
(params->multifd_zlib_level > 9)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level",
"a value between 0 and 9");
return false;
}
if (params->has_multifd_qatzip_level &&
((params->multifd_qatzip_level > 9) ||
(params->multifd_qatzip_level < 1))) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_qatzip_level",
"a value between 1 and 9");
return false;
}
if (params->has_multifd_zstd_level &&
(params->multifd_zstd_level > 20)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level",
"a value between 0 and 20");
return false;
}
if (params->has_xbzrle_cache_size &&
(params->xbzrle_cache_size < qemu_target_page_size() ||
!is_power_of_2(params->xbzrle_cache_size))) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"xbzrle_cache_size",
"a power of two no less than the target page size");
return false;
}
if (params->has_max_cpu_throttle &&
(params->max_cpu_throttle < params->cpu_throttle_initial ||
params->max_cpu_throttle > 99)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"max_cpu_throttle",
"an integer in the range of cpu_throttle_initial to 99");
return false;
}
if (params->has_announce_initial &&
params->announce_initial > 100000) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"announce_initial",
"a value between 0 and 100000");
return false;
}
if (params->has_announce_max &&
params->announce_max > 100000) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"announce_max",
"a value between 0 and 100000");
return false;
}
if (params->has_announce_rounds &&
params->announce_rounds > 1000) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"announce_rounds",
"a value between 0 and 1000");
return false;
}
if (params->has_announce_step &&
(params->announce_step < 1 ||
params->announce_step > 10000)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"announce_step",
"a value between 0 and 10000");
return false;
}
if (params->has_block_bitmap_mapping &&
!check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) {
error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: ");
return false;
}
#ifdef CONFIG_LINUX
if (migrate_zero_copy_send() &&
((params->has_multifd_compression && params->multifd_compression) ||
(params->tls_creds && *params->tls_creds))) {
error_setg(errp,
"Zero copy only available for non-compressed non-TLS multifd migration");
return false;
}
#endif
if (migrate_mapped_ram() &&
(migrate_multifd_compression() || migrate_tls())) {
error_setg(errp,
"Mapped-ram only available for non-compressed non-TLS multifd migration");
return false;
}
if (params->has_x_vcpu_dirty_limit_period &&
(params->x_vcpu_dirty_limit_period < 1 ||
params->x_vcpu_dirty_limit_period > 1000)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"x-vcpu-dirty-limit-period",
"a value between 1 and 1000");
return false;
}
if (params->has_vcpu_dirty_limit &&
(params->vcpu_dirty_limit < 1)) {
error_setg(errp,
"Parameter 'vcpu_dirty_limit' must be greater than 1 MB/s");
return false;
}
if (params->has_direct_io && params->direct_io && !qemu_has_direct_io()) {
error_setg(errp, "No build-time support for direct-io");
return false;
}
return true;
}
static void migrate_params_test_apply(MigrateSetParameters *params,
MigrationParameters *dest)
{
*dest = migrate_get_current()->parameters;
/* TODO use QAPI_CLONE() instead of duplicating it inline */
if (params->has_throttle_trigger_threshold) {
dest->throttle_trigger_threshold = params->throttle_trigger_threshold;
}
if (params->has_cpu_throttle_initial) {
dest->cpu_throttle_initial = params->cpu_throttle_initial;
}
if (params->has_cpu_throttle_increment) {
dest->cpu_throttle_increment = params->cpu_throttle_increment;
}
if (params->has_cpu_throttle_tailslow) {
dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow;
}
if (params->tls_creds) {
assert(params->tls_creds->type == QTYPE_QSTRING);
dest->tls_creds = params->tls_creds->u.s;
}
if (params->tls_hostname) {
assert(params->tls_hostname->type == QTYPE_QSTRING);
dest->tls_hostname = params->tls_hostname->u.s;
}
if (params->has_max_bandwidth) {
dest->max_bandwidth = params->max_bandwidth;
}
if (params->has_avail_switchover_bandwidth) {
dest->avail_switchover_bandwidth = params->avail_switchover_bandwidth;
}
if (params->has_downtime_limit) {
dest->downtime_limit = params->downtime_limit;
}
if (params->has_x_checkpoint_delay) {
dest->x_checkpoint_delay = params->x_checkpoint_delay;
}
if (params->has_multifd_channels) {
dest->multifd_channels = params->multifd_channels;
}
if (params->has_multifd_compression) {
dest->multifd_compression = params->multifd_compression;
}
if (params->has_multifd_qatzip_level) {
dest->multifd_qatzip_level = params->multifd_qatzip_level;
}
if (params->has_multifd_zlib_level) {
dest->multifd_zlib_level = params->multifd_zlib_level;
}
if (params->has_multifd_zstd_level) {
dest->multifd_zstd_level = params->multifd_zstd_level;
}
if (params->has_xbzrle_cache_size) {
dest->xbzrle_cache_size = params->xbzrle_cache_size;
}
if (params->has_max_postcopy_bandwidth) {
dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth;
}
if (params->has_max_cpu_throttle) {
dest->max_cpu_throttle = params->max_cpu_throttle;
}
if (params->has_announce_initial) {
dest->announce_initial = params->announce_initial;
}
if (params->has_announce_max) {
dest->announce_max = params->announce_max;
}
if (params->has_announce_rounds) {
dest->announce_rounds = params->announce_rounds;
}
if (params->has_announce_step) {
dest->announce_step = params->announce_step;
}
if (params->has_block_bitmap_mapping) {
dest->has_block_bitmap_mapping = true;
dest->block_bitmap_mapping = params->block_bitmap_mapping;
}
if (params->has_x_vcpu_dirty_limit_period) {
dest->x_vcpu_dirty_limit_period =
params->x_vcpu_dirty_limit_period;
}
if (params->has_vcpu_dirty_limit) {
dest->vcpu_dirty_limit = params->vcpu_dirty_limit;
}
if (params->has_mode) {
dest->mode = params->mode;
}
if (params->has_zero_page_detection) {
dest->zero_page_detection = params->zero_page_detection;
}
if (params->has_direct_io) {
dest->direct_io = params->direct_io;
}
}
static void migrate_params_apply(MigrateSetParameters *params, Error **errp)
{
MigrationState *s = migrate_get_current();
/* TODO use QAPI_CLONE() instead of duplicating it inline */
if (params->has_throttle_trigger_threshold) {
s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold;
}
if (params->has_cpu_throttle_initial) {
s->parameters.cpu_throttle_initial = params->cpu_throttle_initial;
}
if (params->has_cpu_throttle_increment) {
s->parameters.cpu_throttle_increment = params->cpu_throttle_increment;
}
if (params->has_cpu_throttle_tailslow) {
s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow;
}
if (params->tls_creds) {
g_free(s->parameters.tls_creds);
assert(params->tls_creds->type == QTYPE_QSTRING);
s->parameters.tls_creds = g_strdup(params->tls_creds->u.s);
}
if (params->tls_hostname) {
g_free(s->parameters.tls_hostname);
assert(params->tls_hostname->type == QTYPE_QSTRING);
s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s);
}
if (params->tls_authz) {
g_free(s->parameters.tls_authz);
assert(params->tls_authz->type == QTYPE_QSTRING);
s->parameters.tls_authz = g_strdup(params->tls_authz->u.s);
}
if (params->has_max_bandwidth) {
s->parameters.max_bandwidth = params->max_bandwidth;
if (s->to_dst_file && !migration_in_postcopy()) {
migration_rate_set(s->parameters.max_bandwidth);
}
}
if (params->has_avail_switchover_bandwidth) {
s->parameters.avail_switchover_bandwidth = params->avail_switchover_bandwidth;
}
if (params->has_downtime_limit) {
s->parameters.downtime_limit = params->downtime_limit;
}
if (params->has_x_checkpoint_delay) {
s->parameters.x_checkpoint_delay = params->x_checkpoint_delay;
colo_checkpoint_delay_set();
}
if (params->has_multifd_channels) {
s->parameters.multifd_channels = params->multifd_channels;
}
if (params->has_multifd_compression) {
s->parameters.multifd_compression = params->multifd_compression;
}
if (params->has_multifd_qatzip_level) {
s->parameters.multifd_qatzip_level = params->multifd_qatzip_level;
}
if (params->has_multifd_zlib_level) {
s->parameters.multifd_zlib_level = params->multifd_zlib_level;
}
if (params->has_multifd_zstd_level) {
s->parameters.multifd_zstd_level = params->multifd_zstd_level;
}
if (params->has_xbzrle_cache_size) {
s->parameters.xbzrle_cache_size = params->xbzrle_cache_size;
xbzrle_cache_resize(params->xbzrle_cache_size, errp);
}
if (params->has_max_postcopy_bandwidth) {
s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth;
if (s->to_dst_file && migration_in_postcopy()) {
migration_rate_set(s->parameters.max_postcopy_bandwidth);
}
}
if (params->has_max_cpu_throttle) {
s->parameters.max_cpu_throttle = params->max_cpu_throttle;
}
if (params->has_announce_initial) {
s->parameters.announce_initial = params->announce_initial;
}
if (params->has_announce_max) {
s->parameters.announce_max = params->announce_max;
}
if (params->has_announce_rounds) {
s->parameters.announce_rounds = params->announce_rounds;
}
if (params->has_announce_step) {
s->parameters.announce_step = params->announce_step;
}
if (params->has_block_bitmap_mapping) {
qapi_free_BitmapMigrationNodeAliasList(
s->parameters.block_bitmap_mapping);
s->parameters.has_block_bitmap_mapping = true;
s->parameters.block_bitmap_mapping =
QAPI_CLONE(BitmapMigrationNodeAliasList,
params->block_bitmap_mapping);
}
if (params->has_x_vcpu_dirty_limit_period) {
s->parameters.x_vcpu_dirty_limit_period =
params->x_vcpu_dirty_limit_period;
}
if (params->has_vcpu_dirty_limit) {
s->parameters.vcpu_dirty_limit = params->vcpu_dirty_limit;
}
if (params->has_mode) {
s->parameters.mode = params->mode;
}
if (params->has_zero_page_detection) {
s->parameters.zero_page_detection = params->zero_page_detection;
}
if (params->has_direct_io) {
s->parameters.direct_io = params->direct_io;
}
}
void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp)
{
MigrationParameters tmp;
/* TODO Rewrite "" to null instead for all three tls_* parameters */
if (params->tls_creds
&& params->tls_creds->type == QTYPE_QNULL) {
qobject_unref(params->tls_creds->u.n);
params->tls_creds->type = QTYPE_QSTRING;
params->tls_creds->u.s = strdup("");
}
if (params->tls_hostname
&& params->tls_hostname->type == QTYPE_QNULL) {
qobject_unref(params->tls_hostname->u.n);
params->tls_hostname->type = QTYPE_QSTRING;
params->tls_hostname->u.s = strdup("");
}
if (params->tls_authz
&& params->tls_authz->type == QTYPE_QNULL) {
qobject_unref(params->tls_authz->u.n);
params->tls_authz->type = QTYPE_QSTRING;
params->tls_authz->u.s = strdup("");
}
migrate_params_test_apply(params, &tmp);
if (!migrate_params_check(&tmp, errp)) {
/* Invalid parameter */
return;
}
migrate_params_apply(params, errp);
}
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