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Pull request

Browse source 
- Rebase last pull request
 - Drop multifd
 - several other minor fixesLaLaLa
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Merge remote-tracking branch 'remotes/juanquintela/tags/migration-pull-request' into staging

Pull request

- Rebase last pull request
- Drop multifd
- several other minor fixesLaLaLa

# gpg: Signature made Mon 25 Mar 2019 17:46:29 GMT
# gpg:                using RSA key F487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>" [full]
# gpg:                 aka "Juan Quintela <quintela@trasno.org>" [full]
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* remotes/juanquintela/tags/migration-pull-request:
  migration/postcopy: Update the bandwidth during postcopy
  Migration/colo.c: Make user obtain the last COLO mode info after failover
  Migration/colo.c: Add the necessary checks for colo_do_failover
  Migration/colo.c: Add new COLOExitReason to handle all failover state
  Migration/colo.c: Fix COLO failover status error
  migration/rdma: Check qemu_rdma_init_one_block
  migration: add support for a "tls-authz" migration parameter
  multifd: Drop x-
  multifd: Add some padding
  multifd: Change default packet size
  multifd: Be flexible about packet size
  multifd: Drop x-multifd-page-count parameter
  multifd: Create new next_packet_size field
  multifd: Rename "size" member to pages_alloc
  multifd: Only send pages when packet are not empty

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2019-03-25 18:15:43 +00:00
commit 7e9a2137ce
9 changed files with 198 additions and 139 deletions
Download patch file Download diff file Expand all files Collapse all files

57
migration/colo.c
View file

@ -38,6 +38,9 @@
static bool vmstate_loading;
static Notifier packets_compare_notifier;
/* User need to know colo mode after COLO failover */
static COLOMode last_colo_mode;
#define COLO_BUFFER_BASE_SIZE (4 * 1024 * 1024)
bool migration_in_colo_state(void)
@ -121,6 +124,7 @@ static void secondary_vm_do_failover(void)
}
/* Notify COLO incoming thread that failover work is finished */
qemu_sem_post(&mis->colo_incoming_sem);
/* For Secondary VM, jump to incoming co */
if (mis->migration_incoming_co) {
qemu_coroutine_enter(mis->migration_incoming_co);
@ -196,10 +200,16 @@ void colo_do_failover(MigrationState *s)
vm_stop_force_state(RUN_STATE_COLO);
}
if (get_colo_mode() == COLO_MODE_PRIMARY) {
switch (get_colo_mode()) {
case COLO_MODE_PRIMARY:
primary_vm_do_failover();
} else {
break;
case COLO_MODE_SECONDARY:
secondary_vm_do_failover();
break;
default:
error_report("colo_do_failover failed because the colo mode"
" could not be obtained");
}
}
@ -257,16 +267,21 @@ COLOStatus *qmp_query_colo_status(Error **errp)
COLOStatus *s = g_new0(COLOStatus, 1);
s->mode = get_colo_mode();
s->last_mode = last_colo_mode;
switch (failover_get_state()) {
case FAILOVER_STATUS_NONE:
s->reason = COLO_EXIT_REASON_NONE;
break;
case FAILOVER_STATUS_REQUIRE:
case FAILOVER_STATUS_COMPLETED:
s->reason = COLO_EXIT_REASON_REQUEST;
break;
default:
s->reason = COLO_EXIT_REASON_ERROR;
if (migration_in_colo_state()) {
s->reason = COLO_EXIT_REASON_PROCESSING;
} else {
s->reason = COLO_EXIT_REASON_ERROR;
}
}
return s;
@ -504,6 +519,12 @@ static void colo_process_checkpoint(MigrationState *s)
Error *local_err = NULL;
int ret;
last_colo_mode = get_colo_mode();
if (last_colo_mode != COLO_MODE_PRIMARY) {
error_report("COLO mode must be COLO_MODE_PRIMARY");
return;
}
failover_init_state();
s->rp_state.from_dst_file = qemu_file_get_return_path(s->to_dst_file);
@ -578,16 +599,13 @@ out:
* or the user triggered failover.
*/
switch (failover_get_state()) {
case FAILOVER_STATUS_NONE:
qapi_event_send_colo_exit(COLO_MODE_PRIMARY,
COLO_EXIT_REASON_ERROR);
break;
case FAILOVER_STATUS_REQUIRE:
case FAILOVER_STATUS_COMPLETED:
qapi_event_send_colo_exit(COLO_MODE_PRIMARY,
COLO_EXIT_REASON_REQUEST);
break;
default:
abort();
qapi_event_send_colo_exit(COLO_MODE_PRIMARY,
COLO_EXIT_REASON_ERROR);
}
/* Hope this not to be too long to wait here */
@ -680,6 +698,12 @@ void *colo_process_incoming_thread(void *opaque)
migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE,
MIGRATION_STATUS_COLO);
last_colo_mode = get_colo_mode();
if (last_colo_mode != COLO_MODE_SECONDARY) {
error_report("COLO mode must be COLO_MODE_SECONDARY");
return NULL;
}
failover_init_state();
mis->to_src_file = qemu_file_get_return_path(mis->from_src_file);
@ -849,17 +873,18 @@ out:
error_report_err(local_err);
}
/*
* There are only two reasons we can get here, some error happened
* or the user triggered failover.
*/
switch (failover_get_state()) {
case FAILOVER_STATUS_NONE:
qapi_event_send_colo_exit(COLO_MODE_SECONDARY,
COLO_EXIT_REASON_ERROR);
break;
case FAILOVER_STATUS_REQUIRE:
case FAILOVER_STATUS_COMPLETED:
qapi_event_send_colo_exit(COLO_MODE_SECONDARY,
COLO_EXIT_REASON_REQUEST);
break;
default:
abort();
qapi_event_send_colo_exit(COLO_MODE_SECONDARY,
COLO_EXIT_REASON_ERROR);
}
if (fb) {

70
migration/migration.c
View file

@ -82,7 +82,6 @@
/* 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_PAGE_COUNT 16
/* Background transfer rate for postcopy, 0 means unlimited, note
* that page requests can still exceed this limit.
@ -758,6 +757,8 @@ MigrationParameters *qmp_query_migrate_parameters(Error **errp)
params->tls_creds = g_strdup(s->parameters.tls_creds);
params->has_tls_hostname = true;
params->tls_hostname = g_strdup(s->parameters.tls_hostname);
params->has_tls_authz = true;
params->tls_authz = g_strdup(s->parameters.tls_authz);
params->has_max_bandwidth = true;
params->max_bandwidth = s->parameters.max_bandwidth;
params->has_downtime_limit = true;
@ -766,10 +767,8 @@ MigrationParameters *qmp_query_migrate_parameters(Error **errp)
params->x_checkpoint_delay = s->parameters.x_checkpoint_delay;
params->has_block_incremental = true;
params->block_incremental = s->parameters.block_incremental;
params->has_x_multifd_channels = true;
params->x_multifd_channels = s->parameters.x_multifd_channels;
params->has_x_multifd_page_count = true;
params->x_multifd_page_count = s->parameters.x_multifd_page_count;
params->has_multifd_channels = true;
params->multifd_channels = s->parameters.multifd_channels;
params->has_xbzrle_cache_size = true;
params->xbzrle_cache_size = s->parameters.xbzrle_cache_size;
params->has_max_postcopy_bandwidth = true;
@ -1152,20 +1151,12 @@ static bool migrate_params_check(MigrationParameters *params, Error **errp)
/* x_checkpoint_delay is now always positive */
if (params->has_x_multifd_channels && (params->x_multifd_channels < 1)) {
if (params->has_multifd_channels && (params->multifd_channels < 1)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"multifd_channels",
"is invalid, it should be in the range of 1 to 255");
return false;
}
if (params->has_x_multifd_page_count &&
(params->x_multifd_page_count < 1 ||
params->x_multifd_page_count > 10000)) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
"multifd_page_count",
"is invalid, it should be in the range of 1 to 10000");
return false;
}
if (params->has_xbzrle_cache_size &&
(params->xbzrle_cache_size < qemu_target_page_size() ||
@ -1274,11 +1265,8 @@ static void migrate_params_test_apply(MigrateSetParameters *params,
if (params->has_block_incremental) {
dest->block_incremental = params->block_incremental;
}
if (params->has_x_multifd_channels) {
dest->x_multifd_channels = params->x_multifd_channels;
}
if (params->has_x_multifd_page_count) {
dest->x_multifd_page_count = params->x_multifd_page_count;
if (params->has_multifd_channels) {
dest->multifd_channels = params->multifd_channels;
}
if (params->has_xbzrle_cache_size) {
dest->xbzrle_cache_size = params->xbzrle_cache_size;
@ -1345,9 +1333,15 @@ static void migrate_params_apply(MigrateSetParameters *params, Error **errp)
s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s);
}
if (params->has_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) {
if (s->to_dst_file && !migration_in_postcopy()) {
qemu_file_set_rate_limit(s->to_dst_file,
s->parameters.max_bandwidth / XFER_LIMIT_RATIO);
}
@ -1367,11 +1361,8 @@ static void migrate_params_apply(MigrateSetParameters *params, Error **errp)
if (params->has_block_incremental) {
s->parameters.block_incremental = params->block_incremental;
}
if (params->has_x_multifd_channels) {
s->parameters.x_multifd_channels = params->x_multifd_channels;
}
if (params->has_x_multifd_page_count) {
s->parameters.x_multifd_page_count = params->x_multifd_page_count;
if (params->has_multifd_channels) {
s->parameters.multifd_channels = params->multifd_channels;
}
if (params->has_xbzrle_cache_size) {
s->parameters.xbzrle_cache_size = params->xbzrle_cache_size;
@ -1379,6 +1370,10 @@ static void migrate_params_apply(MigrateSetParameters *params, Error **errp)
}
if (params->has_max_postcopy_bandwidth) {
s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth;
if (s->to_dst_file && migration_in_postcopy()) {
qemu_file_set_rate_limit(s->to_dst_file,
s->parameters.max_postcopy_bandwidth / XFER_LIMIT_RATIO);
}
}
if (params->has_max_cpu_throttle) {
s->parameters.max_cpu_throttle = params->max_cpu_throttle;
@ -2130,7 +2125,7 @@ bool migrate_use_multifd(void)
s = migrate_get_current();
return s->enabled_capabilities[MIGRATION_CAPABILITY_X_MULTIFD];
return s->enabled_capabilities[MIGRATION_CAPABILITY_MULTIFD];
}
bool migrate_pause_before_switchover(void)
@ -2149,16 +2144,7 @@ int migrate_multifd_channels(void)
s = migrate_get_current();
return s->parameters.x_multifd_channels;
}
int migrate_multifd_page_count(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.x_multifd_page_count;
return s->parameters.multifd_channels;
}
int migrate_use_xbzrle(void)
@ -3400,12 +3386,9 @@ static Property migration_properties[] = {
DEFINE_PROP_UINT32("x-checkpoint-delay", MigrationState,
parameters.x_checkpoint_delay,
DEFAULT_MIGRATE_X_CHECKPOINT_DELAY),
DEFINE_PROP_UINT8("x-multifd-channels", MigrationState,
parameters.x_multifd_channels,
DEFINE_PROP_UINT8("multifd-channels", MigrationState,
parameters.multifd_channels,
DEFAULT_MIGRATE_MULTIFD_CHANNELS),
DEFINE_PROP_UINT32("x-multifd-page-count", MigrationState,
parameters.x_multifd_page_count,
DEFAULT_MIGRATE_MULTIFD_PAGE_COUNT),
DEFINE_PROP_SIZE("xbzrle-cache-size", MigrationState,
parameters.xbzrle_cache_size,
DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE),
@ -3440,7 +3423,7 @@ static Property migration_properties[] = {
DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM),
DEFINE_PROP_MIG_CAP("x-block", MIGRATION_CAPABILITY_BLOCK),
DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH),
DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_X_MULTIFD),
DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_MULTIFD),
DEFINE_PROP_END_OF_LIST(),
};
@ -3494,8 +3477,7 @@ static void migration_instance_init(Object *obj)
params->has_downtime_limit = true;
params->has_x_checkpoint_delay = true;
params->has_block_incremental = true;
params->has_x_multifd_channels = true;
params->has_x_multifd_page_count = true;
params->has_multifd_channels = true;
params->has_xbzrle_cache_size = true;
params->has_max_postcopy_bandwidth = true;
params->has_max_cpu_throttle = true;

1
migration/migration.h
View file

@ -274,7 +274,6 @@ bool migrate_auto_converge(void);
bool migrate_use_multifd(void);
bool migrate_pause_before_switchover(void);
int migrate_multifd_channels(void);
int migrate_multifd_page_count(void);
int migrate_use_xbzrle(void);
int64_t migrate_xbzrle_cache_size(void);

90
migration/ram.c
View file

@ -583,20 +583,29 @@ exit:
#define MULTIFD_FLAG_SYNC (1 << 0)
/* This value needs to be a multiple of qemu_target_page_size() */
#define MULTIFD_PACKET_SIZE (512 * 1024)
typedef struct {
uint32_t magic;
uint32_t version;
unsigned char uuid[16]; /* QemuUUID */
uint8_t id;
uint8_t unused1[7]; /* Reserved for future use */
uint64_t unused2[4]; /* Reserved for future use */
} __attribute__((packed)) MultiFDInit_t;
typedef struct {
uint32_t magic;
uint32_t version;
uint32_t flags;
uint32_t size;
uint32_t used;
/* maximum number of allocated pages */
uint32_t pages_alloc;
uint32_t pages_used;
/* size of the next packet that contains pages */
uint32_t next_packet_size;
uint64_t packet_num;
uint64_t unused[4]; /* Reserved for future use */
char ramblock[256];
uint64_t offset[];
} __attribute__((packed)) MultiFDPacket_t;
@ -643,6 +652,8 @@ typedef struct {
MultiFDPacket_t *packet;
/* multifd flags for each packet */
uint32_t flags;
/* size of the next packet that contains pages */
uint32_t next_packet_size;
/* global number of generated multifd packets */
uint64_t packet_num;
/* thread local variables */
@ -679,6 +690,8 @@ typedef struct {
/* global number of generated multifd packets */
uint64_t packet_num;
/* thread local variables */
/* size of the next packet that contains pages */
uint32_t next_packet_size;
/* packets sent through this channel */
uint64_t num_packets;
/* pages sent through this channel */
@ -776,13 +789,15 @@ static void multifd_pages_clear(MultiFDPages_t *pages)
static void multifd_send_fill_packet(MultiFDSendParams *p)
{
MultiFDPacket_t *packet = p->packet;
uint32_t page_max = MULTIFD_PACKET_SIZE / qemu_target_page_size();
int i;
packet->magic = cpu_to_be32(MULTIFD_MAGIC);
packet->version = cpu_to_be32(MULTIFD_VERSION);
packet->flags = cpu_to_be32(p->flags);
packet->size = cpu_to_be32(migrate_multifd_page_count());
packet->used = cpu_to_be32(p->pages->used);
packet->pages_alloc = cpu_to_be32(page_max);
packet->pages_used = cpu_to_be32(p->pages->used);
packet->next_packet_size = cpu_to_be32(p->next_packet_size);
packet->packet_num = cpu_to_be64(p->packet_num);
if (p->pages->block) {
@ -797,6 +812,7 @@ static void multifd_send_fill_packet(MultiFDSendParams *p)
static int multifd_recv_unfill_packet(MultiFDRecvParams *p, Error **errp)
{
MultiFDPacket_t *packet = p->packet;
uint32_t pages_max = MULTIFD_PACKET_SIZE / qemu_target_page_size();
RAMBlock *block;
int i;
@ -818,22 +834,35 @@ static int multifd_recv_unfill_packet(MultiFDRecvParams *p, Error **errp)
p->flags = be32_to_cpu(packet->flags);
packet->size = be32_to_cpu(packet->size);
if (packet->size > migrate_multifd_page_count()) {
packet->pages_alloc = be32_to_cpu(packet->pages_alloc);
/*
* If we recevied a packet that is 100 times bigger than expected
* just stop migration. It is a magic number.
*/
if (packet->pages_alloc > pages_max * 100) {
error_setg(errp, "multifd: received packet "
"with size %d and expected maximum size %d",
packet->size, migrate_multifd_page_count()) ;
return -1;
}
p->pages->used = be32_to_cpu(packet->used);
if (p->pages->used > packet->size) {
error_setg(errp, "multifd: received packet "
"with size %d and expected maximum size %d",
p->pages->used, packet->size) ;
"with size %d and expected a maximum size of %d",
packet->pages_alloc, pages_max * 100) ;
return -1;
}
/*
* We received a packet that is bigger than expected but inside
* reasonable limits (see previous comment). Just reallocate.
*/
if (packet->pages_alloc > p->pages->allocated) {
multifd_pages_clear(p->pages);
multifd_pages_init(packet->pages_alloc);
}
p->pages->used = be32_to_cpu(packet->pages_used);
if (p->pages->used > packet->pages_alloc) {
error_setg(errp, "multifd: received packet "
"with %d pages and expected maximum pages are %d",
p->pages->used, packet->pages_alloc) ;
return -1;
}
p->next_packet_size = be32_to_cpu(packet->next_packet_size);
p->packet_num = be64_to_cpu(packet->packet_num);
if (p->pages->used) {
@ -1073,6 +1102,7 @@ static void *multifd_send_thread(void *opaque)
uint64_t packet_num = p->packet_num;
uint32_t flags = p->flags;
p->next_packet_size = used * qemu_target_page_size();
multifd_send_fill_packet(p);
p->flags = 0;
p->num_packets++;
@ -1080,7 +1110,8 @@ static void *multifd_send_thread(void *opaque)
p->pages->used = 0;
qemu_mutex_unlock(&p->mutex);
trace_multifd_send(p->id, packet_num, used, flags);
trace_multifd_send(p->id, packet_num, used, flags,
p->next_packet_size);
ret = qio_channel_write_all(p->c, (void *)p->packet,
p->packet_len, &local_err);
@ -1088,9 +1119,12 @@ static void *multifd_send_thread(void *opaque)
break;
}
ret = qio_channel_writev_all(p->c, p->pages->iov, used, &local_err);
if (ret != 0) {
break;
if (used) {
ret = qio_channel_writev_all(p->c, p->pages->iov,
used, &local_err);
if (ret != 0) {
break;
}
}
qemu_mutex_lock(&p->mutex);
@ -1148,7 +1182,7 @@ static void multifd_new_send_channel_async(QIOTask *task, gpointer opaque)
int multifd_save_setup(void)
{
int thread_count;
uint32_t page_count = migrate_multifd_page_count();
uint32_t page_count = MULTIFD_PACKET_SIZE / qemu_target_page_size();
uint8_t i;
if (!migrate_use_multifd()) {
@ -1312,14 +1346,18 @@ static void *multifd_recv_thread(void *opaque)
used = p->pages->used;
flags = p->flags;
trace_multifd_recv(p->id, p->packet_num, used, flags);
trace_multifd_recv(p->id, p->packet_num, used, flags,
p->next_packet_size);
p->num_packets++;
p->num_pages += used;
qemu_mutex_unlock(&p->mutex);
ret = qio_channel_readv_all(p->c, p->pages->iov, used, &local_err);
if (ret != 0) {
break;
if (used) {
ret = qio_channel_readv_all(p->c, p->pages->iov,
used, &local_err);
if (ret != 0) {
break;
}
}
if (flags & MULTIFD_FLAG_SYNC) {
@ -1344,7 +1382,7 @@ static void *multifd_recv_thread(void *opaque)
int multifd_load_setup(void)
{
int thread_count;
uint32_t page_count = migrate_multifd_page_count();
uint32_t page_count = MULTIFD_PACKET_SIZE / qemu_target_page_size();
uint8_t i;
if (!migrate_use_multifd()) {

6
migration/rdma.c
View file

@ -641,10 +641,14 @@ static int qemu_rdma_init_one_block(RAMBlock *rb, void *opaque)
static int qemu_rdma_init_ram_blocks(RDMAContext *rdma)
{
RDMALocalBlocks *local = &rdma->local_ram_blocks;
int ret;
assert(rdma->blockmap == NULL);
memset(local, 0, sizeof *local);
foreach_not_ignored_block(qemu_rdma_init_one_block, rdma);
ret = foreach_not_ignored_block(qemu_rdma_init_one_block, rdma);
if (ret) {
return ret;
}
trace_qemu_rdma_init_ram_blocks(local->nb_blocks);
rdma->dest_blocks = g_new0(RDMADestBlock,
rdma->local_ram_blocks.nb_blocks);

2
migration/tls.c
View file

@ -94,7 +94,7 @@ void migration_tls_channel_process_incoming(MigrationState *s,
tioc = qio_channel_tls_new_server(
ioc, creds,
NULL, /* XXX pass ACL name */
s->parameters.tls_authz,
errp);
if (!tioc) {
return;

4
migration/trace-events
View file

@ -80,13 +80,13 @@ get_queued_page_not_dirty(const char *block_name, uint64_t tmp_offset, unsigned
migration_bitmap_sync_start(void) ""
migration_bitmap_sync_end(uint64_t dirty_pages) "dirty_pages %" PRIu64
migration_throttle(void) ""
multifd_recv(uint8_t id, uint64_t packet_num, uint32_t used, uint32_t flags) "channel %d packet number %" PRIu64 " pages %d flags 0x%x"
multifd_recv(uint8_t id, uint64_t packet_num, uint32_t used, uint32_t flags, uint32_t next_packet_size) "channel %d packet number %" PRIu64 " pages %d flags 0x%x next packet size %d"
multifd_recv_sync_main(long packet_num) "packet num %ld"
multifd_recv_sync_main_signal(uint8_t id) "channel %d"
multifd_recv_sync_main_wait(uint8_t id) "channel %d"
multifd_recv_thread_end(uint8_t id, uint64_t packets, uint64_t pages) "channel %d packets %" PRIu64 " pages %" PRIu64
multifd_recv_thread_start(uint8_t id) "%d"
multifd_send(uint8_t id, uint64_t packet_num, uint32_t used, uint32_t flags) "channel %d packet_num %" PRIu64 " pages %d flags 0x%x"
multifd_send(uint8_t id, uint64_t packet_num, uint32_t used, uint32_t flags, uint32_t next_packet_size) "channel %d packet_num %" PRIu64 " pages %d flags 0x%x next packet size %d"
multifd_send_sync_main(long packet_num) "packet num %ld"
multifd_send_sync_main_signal(uint8_t id) "channel %d"
multifd_send_sync_main_wait(uint8_t id) "channel %d"