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live migration: Propagate output monitor to callback handler

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In order to allow proper progress reporting to the monitor that
initiated the migration, forward the monitor reference through the
migration layer down to SaveLiveStateHandler.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Jan Kiszka 2009-11-30 18:21:21 +01:00 committed by Anthony Liguori
parent 82801d8f4f
commit f327aa0c60
11 changed files with 73 additions and 59 deletions
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2
block-migration.c
View File

@ -352,7 +352,7 @@ static void blk_mig_cleanup(void)
printf("\n");
}
static int block_save_live(QEMUFile *f, int stage, void *opaque)
static int block_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque)
{
dprintf("Enter save live stage %d submitted %d transferred %d\n",
stage, block_mig_state.submitted, block_mig_state.transferred);

3
hw/hw.h
View File

@ -244,7 +244,8 @@ int64_t qemu_fseek(QEMUFile *f, int64_t pos, int whence);
typedef void SaveSetParamsHandler(int blk_enable, int shared, void * opaque);
typedef void SaveStateHandler(QEMUFile *f, void *opaque);
typedef int SaveLiveStateHandler(QEMUFile *f, int stage, void *opaque);
typedef int SaveLiveStateHandler(Monitor *mon, QEMUFile *f, int stage,
void *opaque);
typedef int LoadStateHandler(QEMUFile *f, void *opaque, int version_id);
int register_savevm(const char *idstr,

12
migration-exec.c
View File

@ -52,7 +52,8 @@ static int exec_close(FdMigrationState *s)
return 0;
}
MigrationState *exec_start_outgoing_migration(const char *command,
MigrationState *exec_start_outgoing_migration(Monitor *mon,
const char *command,
int64_t bandwidth_limit,
int detach,
int blk,
@ -88,13 +89,14 @@ MigrationState *exec_start_outgoing_migration(const char *command,
s->mig_state.blk = blk;
s->mig_state.shared = inc;
s->state = MIG_STATE_ACTIVE;
s->mon_resume = NULL;
s->mon = NULL;
s->bandwidth_limit = bandwidth_limit;
if (!detach)
migrate_fd_monitor_suspend(s);
if (!detach) {
migrate_fd_monitor_suspend(s, mon);
}
migrate_fd_connect(s);
return &s->mig_state;

9
migration-fd.c
View File

@ -82,13 +82,14 @@ MigrationState *fd_start_outgoing_migration(Monitor *mon,
s->mig_state.blk = blk;
s->mig_state.shared = inc;
s->state = MIG_STATE_ACTIVE;
s->mon_resume = NULL;
s->mon = NULL;
s->bandwidth_limit = bandwidth_limit;
if (!detach)
migrate_fd_monitor_suspend(s);
if (!detach) {
migrate_fd_monitor_suspend(s, mon);
}
migrate_fd_connect(s);
return &s->mig_state;

10
migration-tcp.c
View File

@ -76,7 +76,8 @@ static void tcp_wait_for_connect(void *opaque)
}
}
MigrationState *tcp_start_outgoing_migration(const char *host_port,
MigrationState *tcp_start_outgoing_migration(Monitor *mon,
const char *host_port,
int64_t bandwidth_limit,
int detach,
int blk,
@ -102,7 +103,7 @@ MigrationState *tcp_start_outgoing_migration(const char *host_port,
s->mig_state.shared = inc;
s->state = MIG_STATE_ACTIVE;
s->mon_resume = NULL;
s->mon = NULL;
s->bandwidth_limit = bandwidth_limit;
s->fd = socket(PF_INET, SOCK_STREAM, 0);
if (s->fd == -1) {
@ -112,8 +113,9 @@ MigrationState *tcp_start_outgoing_migration(const char *host_port,
socket_set_nonblock(s->fd);
if (!detach)
migrate_fd_monitor_suspend(s);
if (!detach) {
migrate_fd_monitor_suspend(s, mon);
}
do {
ret = connect(s->fd, (struct sockaddr *)&addr, sizeof(addr));

10
migration-unix.c
View File

@ -75,7 +75,8 @@ static void unix_wait_for_connect(void *opaque)
}
}
MigrationState *unix_start_outgoing_migration(const char *path,
MigrationState *unix_start_outgoing_migration(Monitor *mon,
const char *path,
int64_t bandwidth_limit,
int detach,
int blk,
@ -101,7 +102,7 @@ MigrationState *unix_start_outgoing_migration(const char *path,
s->mig_state.shared = inc;
s->state = MIG_STATE_ACTIVE;
s->mon_resume = NULL;
s->mon = NULL;
s->bandwidth_limit = bandwidth_limit;
s->fd = socket(PF_UNIX, SOCK_STREAM, 0);
if (s->fd < 0) {
@ -111,8 +112,9 @@ MigrationState *unix_start_outgoing_migration(const char *path,
socket_set_nonblock(s->fd);
if (!detach)
migrate_fd_monitor_suspend(s);
if (!detach) {
migrate_fd_monitor_suspend(s, mon);
}
do {
ret = connect(s->fd, (struct sockaddr *)&addr, sizeof(addr));

30
migration.c
View File

@ -66,16 +66,16 @@ void do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
}
if (strstart(uri, "tcp:", &p))
s = tcp_start_outgoing_migration(p, max_throttle, detach,
s = tcp_start_outgoing_migration(mon, p, max_throttle, detach,
(int)qdict_get_int(qdict, "blk"),
(int)qdict_get_int(qdict, "inc"));
#if !defined(WIN32)
else if (strstart(uri, "exec:", &p))
s = exec_start_outgoing_migration(p, max_throttle, detach,
s = exec_start_outgoing_migration(mon, p, max_throttle, detach,
(int)qdict_get_int(qdict, "blk"),
(int)qdict_get_int(qdict, "inc"));
else if (strstart(uri, "unix:", &p))
s = unix_start_outgoing_migration(p, max_throttle, detach,
s = unix_start_outgoing_migration(mon, p, max_throttle, detach,
(int)qdict_get_int(qdict, "blk"),
(int)qdict_get_int(qdict, "inc"));
else if (strstart(uri, "fd:", &p))
@ -190,14 +190,15 @@ void do_info_migrate(Monitor *mon)
/* shared migration helpers */
void migrate_fd_monitor_suspend(FdMigrationState *s)
void migrate_fd_monitor_suspend(FdMigrationState *s, Monitor *mon)
{
s->mon_resume = cur_mon;
if (monitor_suspend(cur_mon) == 0)
s->mon = mon;
if (monitor_suspend(mon) == 0) {
dprintf("suspending monitor\n");
else
monitor_printf(cur_mon, "terminal does not allow synchronous "
} else {
monitor_printf(mon, "terminal does not allow synchronous "
"migration, continuing detached\n");
}
}
void migrate_fd_error(FdMigrationState *s)
@ -221,8 +222,9 @@ void migrate_fd_cleanup(FdMigrationState *s)
close(s->fd);
/* Don't resume monitor until we've flushed all of the buffers */
if (s->mon_resume)
monitor_resume(s->mon_resume);
if (s->mon) {
monitor_resume(s->mon);
}
s->fd = -1;
}
@ -265,7 +267,7 @@ void migrate_fd_connect(FdMigrationState *s)
migrate_fd_close);
dprintf("beginning savevm\n");
ret = qemu_savevm_state_begin(s->file, s->mig_state.blk,
ret = qemu_savevm_state_begin(s->mon, s->file, s->mig_state.blk,
s->mig_state.shared);
if (ret < 0) {
dprintf("failed, %d\n", ret);
@ -286,7 +288,7 @@ void migrate_fd_put_ready(void *opaque)
}
dprintf("iterate\n");
if (qemu_savevm_state_iterate(s->file) == 1) {
if (qemu_savevm_state_iterate(s->mon, s->file) == 1) {
int state;
int old_vm_running = vm_running;
@ -295,7 +297,7 @@ void migrate_fd_put_ready(void *opaque)
qemu_aio_flush();
bdrv_flush_all();
if ((qemu_savevm_state_complete(s->file)) < 0) {
if ((qemu_savevm_state_complete(s->mon, s->file)) < 0) {
if (old_vm_running) {
vm_start();
}
@ -324,7 +326,7 @@ void migrate_fd_cancel(MigrationState *mig_state)
dprintf("cancelling migration\n");
s->state = MIG_STATE_CANCELLED;
qemu_savevm_state_cancel(s->file);
qemu_savevm_state_cancel(s->mon, s->file);
migrate_fd_cleanup(s);
}

13
migration.h
View File

@ -42,7 +42,7 @@ struct FdMigrationState
int64_t bandwidth_limit;
QEMUFile *file;
int fd;
Monitor *mon_resume;
Monitor *mon;
int state;
int (*get_error)(struct FdMigrationState*);
int (*close)(struct FdMigrationState*);
@ -66,7 +66,8 @@ void do_info_migrate(Monitor *mon);
int exec_start_incoming_migration(const char *host_port);
MigrationState *exec_start_outgoing_migration(const char *host_port,
MigrationState *exec_start_outgoing_migration(Monitor *mon,
const char *host_port,
int64_t bandwidth_limit,
int detach,
int blk,
@ -74,7 +75,8 @@ MigrationState *exec_start_outgoing_migration(const char *host_port,
int tcp_start_incoming_migration(const char *host_port);
MigrationState *tcp_start_outgoing_migration(const char *host_port,
MigrationState *tcp_start_outgoing_migration(Monitor *mon,
const char *host_port,
int64_t bandwidth_limit,
int detach,
int blk,
@ -82,7 +84,8 @@ MigrationState *tcp_start_outgoing_migration(const char *host_port,
int unix_start_incoming_migration(const char *path);
MigrationState *unix_start_outgoing_migration(const char *path,
MigrationState *unix_start_outgoing_migration(Monitor *mon,
const char *path,
int64_t bandwidth_limit,
int detach,
int blk,
@ -97,7 +100,7 @@ MigrationState *fd_start_outgoing_migration(Monitor *mon,
int blk,
int inc);
void migrate_fd_monitor_suspend(FdMigrationState *s);
void migrate_fd_monitor_suspend(FdMigrationState *s, Monitor *mon);
void migrate_fd_error(FdMigrationState *s);

31
savevm.c
View File

@ -1264,7 +1264,8 @@ static void vmstate_save(QEMUFile *f, SaveStateEntry *se)
#define QEMU_VM_SECTION_END 0x03
#define QEMU_VM_SECTION_FULL 0x04
int qemu_savevm_state_begin(QEMUFile *f, int blk_enable, int shared)
int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable,
int shared)
{
SaveStateEntry *se;
@ -1296,18 +1297,18 @@ int qemu_savevm_state_begin(QEMUFile *f, int blk_enable, int shared)
qemu_put_be32(f, se->instance_id);
qemu_put_be32(f, se->version_id);
se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque);
}
if (qemu_file_has_error(f)) {
qemu_savevm_state_cancel(f);
qemu_savevm_state_cancel(mon, f);
return -EIO;
}
return 0;
}
int qemu_savevm_state_iterate(QEMUFile *f)
int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f)
{
SaveStateEntry *se;
int ret = 1;
@ -1320,21 +1321,21 @@ int qemu_savevm_state_iterate(QEMUFile *f)
qemu_put_byte(f, QEMU_VM_SECTION_PART);
qemu_put_be32(f, se->section_id);
ret &= !!se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
ret &= !!se->save_live_state(mon, f, QEMU_VM_SECTION_PART, se->opaque);
}
if (ret)
return 1;
if (qemu_file_has_error(f)) {
qemu_savevm_state_cancel(f);
qemu_savevm_state_cancel(mon, f);
return -EIO;
}
return 0;
}
int qemu_savevm_state_complete(QEMUFile *f)
int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f)
{
SaveStateEntry *se;
@ -1346,7 +1347,7 @@ int qemu_savevm_state_complete(QEMUFile *f)
qemu_put_byte(f, QEMU_VM_SECTION_END);
qemu_put_be32(f, se->section_id);
se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque);
}
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
@ -1378,18 +1379,18 @@ int qemu_savevm_state_complete(QEMUFile *f)
return 0;
}
void qemu_savevm_state_cancel(QEMUFile *f)
void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f)
{
SaveStateEntry *se;
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
if (se->save_live_state) {
se->save_live_state(f, -1, se->opaque);
se->save_live_state(mon, f, -1, se->opaque);
}
}
}
int qemu_savevm_state(QEMUFile *f)
static int qemu_savevm_state(Monitor *mon, QEMUFile *f)
{
int saved_vm_running;
int ret;
@ -1399,17 +1400,17 @@ int qemu_savevm_state(QEMUFile *f)
bdrv_flush_all();
ret = qemu_savevm_state_begin(f, 0, 0);
ret = qemu_savevm_state_begin(mon, f, 0, 0);
if (ret < 0)
goto out;
do {
ret = qemu_savevm_state_iterate(f);
ret = qemu_savevm_state_iterate(mon, f);
if (ret < 0)
goto out;
} while (ret == 0);
ret = qemu_savevm_state_complete(f);
ret = qemu_savevm_state_complete(mon, f);
out:
if (qemu_file_has_error(f))
@ -1698,7 +1699,7 @@ void do_savevm(Monitor *mon, const QDict *qdict)
monitor_printf(mon, "Could not open VM state file\n");
goto the_end;
}
ret = qemu_savevm_state(f);
ret = qemu_savevm_state(mon, f);
vm_state_size = qemu_ftell(f);
qemu_fclose(f);
if (ret < 0) {

10
sysemu.h
View File

@ -62,11 +62,11 @@ void qemu_announce_self(void);
void main_loop_wait(int timeout);
int qemu_savevm_state_begin(QEMUFile *f, int blk_enable, int shared);
int qemu_savevm_state_iterate(QEMUFile *f);
int qemu_savevm_state_complete(QEMUFile *f);
void qemu_savevm_state_cancel(QEMUFile *f);
int qemu_savevm_state(QEMUFile *f);
int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable,
int shared);
int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f);
int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f);
void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f);
int qemu_loadvm_state(QEMUFile *f);
void qemu_errors_to_file(FILE *fp);

2
vl.c
View File

@ -2927,7 +2927,7 @@ uint64_t ram_bytes_total(void)
return last_ram_offset;
}
static int ram_save_live(QEMUFile *f, int stage, void *opaque)
static int ram_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque)
{
ram_addr_t addr;
uint64_t bytes_transferred_last;