*/
#include <unistd.h>
#include <fcntl.h>
-#include <signal.h>
#include <time.h>
#include <errno.h>
#include <sys/time.h>
#include "migration.h"
#include "qemu_socket.h"
#include "qemu-queue.h"
+#include "qemu-timer.h"
+#include "cpus.h"
#define SELF_ANNOUNCE_ROUNDS 5
if (--count) {
/* delay 50ms, 150ms, 250ms, ... */
- qemu_mod_timer(timer, qemu_get_clock(rt_clock) +
+ qemu_mod_timer(timer, qemu_get_clock_ms(rt_clock) +
50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100);
} else {
qemu_del_timer(timer);
void qemu_announce_self(void)
{
static QEMUTimer *timer;
- timer = qemu_new_timer(rt_clock, qemu_announce_self_once, &timer);
+ timer = qemu_new_timer_ms(rt_clock, qemu_announce_self_once, &timer);
qemu_announce_self_once(&timer);
}
int buf_size; /* 0 when writing */
uint8_t buf[IO_BUF_SIZE];
- int has_error;
+ int last_error;
};
typedef struct QEMUFileStdio
ssize_t len;
do {
- len = recv(s->fd, (void *)buf, size, 0);
+ len = qemu_recv(s->fd, buf, size, 0);
} while (len == -1 && socket_error() == EINTR);
if (len == -1)
static int socket_close(void *opaque)
{
QEMUFileSocket *s = opaque;
- qemu_free(s);
+ g_free(s);
return 0;
}
QEMUFileStdio *s = opaque;
int ret;
ret = pclose(s->stdio_file);
- qemu_free(s);
+ g_free(s);
return ret;
}
{
QEMUFileStdio *s = opaque;
fclose(s->stdio_file);
- qemu_free(s);
+ g_free(s);
return 0;
}
return NULL;
}
- s = qemu_mallocz(sizeof(QEMUFileStdio));
+ s = g_malloc0(sizeof(QEMUFileStdio));
s->stdio_file = stdio_file;
return NULL;
}
- s = qemu_mallocz(sizeof(QEMUFileStdio));
+ s = g_malloc0(sizeof(QEMUFileStdio));
s->stdio_file = fdopen(fd, mode);
if (!s->stdio_file)
goto fail;
return s->file;
fail:
- qemu_free(s);
+ g_free(s);
return NULL;
}
QEMUFile *qemu_fopen_socket(int fd)
{
- QEMUFileSocket *s = qemu_mallocz(sizeof(QEMUFileSocket));
+ QEMUFileSocket *s = g_malloc0(sizeof(QEMUFileSocket));
s->fd = fd;
s->file = qemu_fopen_ops(s, NULL, socket_get_buffer, socket_close,
return NULL;
}
- s = qemu_mallocz(sizeof(QEMUFileStdio));
+ s = g_malloc0(sizeof(QEMUFileStdio));
s->stdio_file = fopen(filename, mode);
if (!s->stdio_file)
}
return s->file;
fail:
- qemu_free(s);
+ g_free(s);
return NULL;
}
{
QEMUFile *f;
- f = qemu_mallocz(sizeof(QEMUFile));
+ f = g_malloc0(sizeof(QEMUFile));
f->opaque = opaque;
f->put_buffer = put_buffer;
return f;
}
-int qemu_file_has_error(QEMUFile *f)
+int qemu_file_get_error(QEMUFile *f)
{
- return f->has_error;
+ return f->last_error;
}
-void qemu_file_set_error(QEMUFile *f)
+void qemu_file_set_error(QEMUFile *f, int ret)
{
- f->has_error = 1;
+ f->last_error = ret;
}
void qemu_fflush(QEMUFile *f)
if (len > 0)
f->buf_offset += f->buf_index;
else
- f->has_error = 1;
+ f->last_error = -EINVAL;
f->buf_index = 0;
}
}
static void qemu_fill_buffer(QEMUFile *f)
{
int len;
+ int pending;
if (!f->get_buffer)
return;
if (f->is_write)
abort();
- len = f->get_buffer(f->opaque, f->buf, f->buf_offset, IO_BUF_SIZE);
+ pending = f->buf_size - f->buf_index;
+ if (pending > 0) {
+ memmove(f->buf, f->buf + f->buf_index, pending);
+ }
+ f->buf_index = 0;
+ f->buf_size = pending;
+
+ len = f->get_buffer(f->opaque, f->buf + pending, f->buf_offset,
+ IO_BUF_SIZE - pending);
if (len > 0) {
- f->buf_index = 0;
- f->buf_size = len;
+ f->buf_size += len;
f->buf_offset += len;
+ } else if (len == 0) {
+ f->last_error = -EIO;
} else if (len != -EAGAIN)
- f->has_error = 1;
+ f->last_error = len;
}
int qemu_fclose(QEMUFile *f)
qemu_fflush(f);
if (f->close)
ret = f->close(f->opaque);
- qemu_free(f);
+ g_free(f);
return ret;
}
{
int l;
- if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
+ if (!f->last_error && f->is_write == 0 && f->buf_index > 0) {
fprintf(stderr,
"Attempted to write to buffer while read buffer is not empty\n");
abort();
}
- while (!f->has_error && size > 0) {
+ while (!f->last_error && size > 0) {
l = IO_BUF_SIZE - f->buf_index;
if (l > size)
l = size;
void qemu_put_byte(QEMUFile *f, int v)
{
- if (!f->has_error && f->is_write == 0 && f->buf_index > 0) {
+ if (!f->last_error && f->is_write == 0 && f->buf_index > 0) {
fprintf(stderr,
"Attempted to write to buffer while read buffer is not empty\n");
abort();
qemu_fflush(f);
}
-int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size1)
+static void qemu_file_skip(QEMUFile *f, int size)
{
- int size, l;
+ if (f->buf_index + size <= f->buf_size) {
+ f->buf_index += size;
+ }
+}
- if (f->is_write)
+static int qemu_peek_buffer(QEMUFile *f, uint8_t *buf, int size, size_t offset)
+{
+ int pending;
+ int index;
+
+ if (f->is_write) {
abort();
+ }
- size = size1;
- while (size > 0) {
- l = f->buf_size - f->buf_index;
- if (l == 0) {
- qemu_fill_buffer(f);
- l = f->buf_size - f->buf_index;
- if (l == 0)
- break;
+ index = f->buf_index + offset;
+ pending = f->buf_size - index;
+ if (pending < size) {
+ qemu_fill_buffer(f);
+ index = f->buf_index + offset;
+ pending = f->buf_size - index;
+ }
+
+ if (pending <= 0) {
+ return 0;
+ }
+ if (size > pending) {
+ size = pending;
+ }
+
+ memcpy(buf, f->buf + index, size);
+ return size;
+}
+
+int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size)
+{
+ int pending = size;
+ int done = 0;
+
+ while (pending > 0) {
+ int res;
+
+ res = qemu_peek_buffer(f, buf, pending, 0);
+ if (res == 0) {
+ return done;
}
- if (l > size)
- l = size;
- memcpy(buf, f->buf + f->buf_index, l);
- f->buf_index += l;
- buf += l;
- size -= l;
+ qemu_file_skip(f, res);
+ buf += res;
+ pending -= res;
+ done += res;
}
- return size1 - size;
+ return done;
}
-static int qemu_peek_byte(QEMUFile *f)
+static int qemu_peek_byte(QEMUFile *f, int offset)
{
- if (f->is_write)
+ int index = f->buf_index + offset;
+
+ if (f->is_write) {
abort();
+ }
- if (f->buf_index >= f->buf_size) {
+ if (index >= f->buf_size) {
qemu_fill_buffer(f);
- if (f->buf_index >= f->buf_size)
+ index = f->buf_index + offset;
+ if (index >= f->buf_size) {
return 0;
+ }
}
- return f->buf[f->buf_index];
+ return f->buf[index];
}
int qemu_get_byte(QEMUFile *f)
{
- if (f->is_write)
- abort();
+ int result;
- if (f->buf_index >= f->buf_size) {
- qemu_fill_buffer(f);
- if (f->buf_index >= f->buf_size)
- return 0;
- }
- return f->buf[f->buf_index++];
+ result = qemu_peek_byte(f, 0);
+ qemu_file_skip(f, 1);
+ return result;
}
int64_t qemu_ftell(QEMUFile *f)
return v;
}
+
+/* timer */
+
+void qemu_put_timer(QEMUFile *f, QEMUTimer *ts)
+{
+ uint64_t expire_time;
+
+ expire_time = qemu_timer_expire_time_ns(ts);
+ qemu_put_be64(f, expire_time);
+}
+
+void qemu_get_timer(QEMUFile *f, QEMUTimer *ts)
+{
+ uint64_t expire_time;
+
+ expire_time = qemu_get_be64(f);
+ if (expire_time != -1) {
+ qemu_mod_timer_ns(ts, expire_time);
+ } else {
+ qemu_del_timer(ts);
+ }
+}
+
+
/* bool */
static int get_bool(QEMUFile *f, void *pv, size_t size)
};
/* unused buffers: space that was used for some fields that are
- not usefull anymore */
+ not useful anymore */
static int get_unused_buffer(QEMUFile *f, void *pv, size_t size)
{
{
SaveStateEntry *se;
- se = qemu_mallocz(sizeof(SaveStateEntry));
+ se = g_malloc0(sizeof(SaveStateEntry));
se->version_id = version_id;
se->section_id = global_section_id++;
se->set_params = set_params;
if (id) {
pstrcpy(se->idstr, sizeof(se->idstr), id);
pstrcat(se->idstr, sizeof(se->idstr), "/");
- qemu_free(id);
+ g_free(id);
- se->compat = qemu_mallocz(sizeof(CompatEntry));
+ se->compat = g_malloc0(sizeof(CompatEntry));
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), idstr);
se->compat->instance_id = instance_id == -1 ?
calculate_compat_instance_id(idstr) : instance_id;
if (path) {
pstrcpy(id, sizeof(id), path);
pstrcat(id, sizeof(id), "/");
- qemu_free(path);
+ g_free(path);
}
}
pstrcat(id, sizeof(id), idstr);
if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
QTAILQ_REMOVE(&savevm_handlers, se, entry);
if (se->compat) {
- qemu_free(se->compat);
+ g_free(se->compat);
}
- qemu_free(se);
- }
- }
-}
-
-/* mark a device as not to be migrated, that is the device should be
- unplugged before migration */
-void register_device_unmigratable(DeviceState *dev, const char *idstr,
- void *opaque)
-{
- SaveStateEntry *se;
- char id[256] = "";
-
- if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
- char *path = dev->parent_bus->info->get_dev_path(dev);
- if (path) {
- pstrcpy(id, sizeof(id), path);
- pstrcat(id, sizeof(id), "/");
- qemu_free(path);
- }
- }
- pstrcat(id, sizeof(id), idstr);
-
- QTAILQ_FOREACH(se, &savevm_handlers, entry) {
- if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
- se->no_migrate = 1;
+ g_free(se);
}
}
}
/* If this triggers, alias support can be dropped for the vmsd. */
assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
- se = qemu_mallocz(sizeof(SaveStateEntry));
+ se = g_malloc0(sizeof(SaveStateEntry));
se->version_id = vmsd->version_id;
se->section_id = global_section_id++;
se->save_live_state = NULL;
se->opaque = opaque;
se->vmsd = vmsd;
se->alias_id = alias_id;
+ se->no_migrate = vmsd->unmigratable;
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
char *id = dev->parent_bus->info->get_dev_path(dev);
if (id) {
pstrcpy(se->idstr, sizeof(se->idstr), id);
pstrcat(se->idstr, sizeof(se->idstr), "/");
- qemu_free(id);
+ g_free(id);
- se->compat = qemu_mallocz(sizeof(CompatEntry));
+ se->compat = g_malloc0(sizeof(CompatEntry));
pstrcpy(se->compat->idstr, sizeof(se->compat->idstr), vmsd->name);
se->compat->instance_id = instance_id == -1 ?
calculate_compat_instance_id(vmsd->name) : instance_id;
if (se->vmsd == vmsd && se->opaque == opaque) {
QTAILQ_REMOVE(&savevm_handlers, se, entry);
if (se->compat) {
- qemu_free(se->compat);
+ g_free(se->compat);
}
- qemu_free(se);
+ g_free(se);
}
}
}
n_elems = field->num;
} else if (field->flags & VMS_VARRAY_INT32) {
n_elems = *(int32_t *)(opaque+field->num_offset);
+ } else if (field->flags & VMS_VARRAY_UINT32) {
+ n_elems = *(uint32_t *)(opaque+field->num_offset);
} else if (field->flags & VMS_VARRAY_UINT16) {
n_elems = *(uint16_t *)(opaque+field->num_offset);
} else if (field->flags & VMS_VARRAY_UINT8) {
n_elems = *(int32_t *)(opaque+field->num_offset);
} else if (field->flags & VMS_VARRAY_UINT16) {
n_elems = *(uint16_t *)(opaque+field->num_offset);
+ } else if (field->flags & VMS_VARRAY_UINT8) {
+ n_elems = *(uint8_t *)(opaque+field->num_offset);
}
if (field->flags & VMS_POINTER) {
base_addr = *(void **)base_addr + field->start;
int shared)
{
SaveStateEntry *se;
+ int ret;
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
if(se->set_params == NULL) {
qemu_put_be32(f, se->instance_id);
qemu_put_be32(f, se->version_id);
- se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque);
+ ret = se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque);
+ if (ret < 0) {
+ qemu_savevm_state_cancel(mon, f);
+ return ret;
+ }
}
-
- if (qemu_file_has_error(f)) {
+ ret = qemu_file_get_error(f);
+ if (ret != 0) {
qemu_savevm_state_cancel(mon, f);
- return -EIO;
}
- return 0;
+ return ret;
+
}
+/*
+ * this funtion has three return values:
+ * negative: there was one error, and we have -errno.
+ * 0 : We haven't finished, caller have to go again
+ * 1 : We have finished, we can go to complete phase
+ */
int qemu_savevm_state_iterate(Monitor *mon, QEMUFile *f)
{
SaveStateEntry *se;
qemu_put_be32(f, se->section_id);
ret = se->save_live_state(mon, f, QEMU_VM_SECTION_PART, se->opaque);
- if (!ret) {
+ if (ret <= 0) {
/* Do not proceed to the next vmstate before this one reported
completion of the current stage. This serializes the migration
and reduces the probability that a faster changing state is
break;
}
}
-
- if (ret)
- return 1;
-
- if (qemu_file_has_error(f)) {
+ if (ret != 0) {
+ return ret;
+ }
+ ret = qemu_file_get_error(f);
+ if (ret != 0) {
qemu_savevm_state_cancel(mon, f);
- return -EIO;
}
-
- return 0;
+ return ret;
}
int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f)
{
SaveStateEntry *se;
+ int ret;
cpu_synchronize_all_states();
qemu_put_byte(f, QEMU_VM_SECTION_END);
qemu_put_be32(f, se->section_id);
- se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque);
+ ret = se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque);
+ if (ret < 0) {
+ return ret;
+ }
}
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
qemu_put_byte(f, QEMU_VM_EOF);
- if (qemu_file_has_error(f))
- return -EIO;
-
- return 0;
+ return qemu_file_get_error(f);
}
void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f)
static int qemu_savevm_state(Monitor *mon, QEMUFile *f)
{
- int saved_vm_running;
int ret;
- saved_vm_running = vm_running;
- vm_stop(VMSTOP_SAVEVM);
-
if (qemu_savevm_state_blocked(mon)) {
ret = -EINVAL;
goto out;
ret = qemu_savevm_state_complete(mon, f);
out:
- if (qemu_file_has_error(f))
- ret = -EIO;
-
- if (!ret && saved_vm_running)
- vm_start();
+ if (ret == 0) {
+ ret = qemu_file_get_error(f);
+ }
return ret;
}
static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
void *opaque)
{
- const VMStateSubsection *sub = vmsd->subsections;
-
- if (!sub || !sub->needed) {
- return 0;
- }
-
- while (qemu_peek_byte(f) == QEMU_VM_SUBSECTION) {
+ while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) {
char idstr[256];
int ret;
- uint8_t version_id, len;
+ uint8_t version_id, len, size;
const VMStateDescription *sub_vmsd;
- qemu_get_byte(f); /* subsection */
- len = qemu_get_byte(f);
- qemu_get_buffer(f, (uint8_t *)idstr, len);
- idstr[len] = 0;
- version_id = qemu_get_be32(f);
+ len = qemu_peek_byte(f, 1);
+ if (len < strlen(vmsd->name) + 1) {
+ /* subsection name has be be "section_name/a" */
+ return 0;
+ }
+ size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2);
+ if (size != len) {
+ return 0;
+ }
+ idstr[size] = 0;
- sub_vmsd = vmstate_get_subsection(sub, idstr);
+ if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) {
+ /* it don't have a valid subsection name */
+ return 0;
+ }
+ sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr);
if (sub_vmsd == NULL) {
return -ENOENT;
}
- assert(!sub_vmsd->subsections);
+ qemu_file_skip(f, 1); /* subsection */
+ qemu_file_skip(f, 1); /* len */
+ qemu_file_skip(f, len); /* idstr */
+ version_id = qemu_get_be32(f);
+
ret = vmstate_load_state(f, sub_vmsd, opaque, version_id);
if (ret) {
return ret;
qemu_put_byte(f, len);
qemu_put_buffer(f, (uint8_t *)vmsd->name, len);
qemu_put_be32(f, vmsd->version_id);
- assert(!vmsd->subsections);
vmstate_save_state(f, vmsd, opaque);
}
sub++;
}
/* Add entry */
- le = qemu_mallocz(sizeof(*le));
+ le = g_malloc0(sizeof(*le));
le->se = se;
le->section_id = section_id;
out:
QLIST_FOREACH_SAFE(le, &loadvm_handlers, entry, new_le) {
QLIST_REMOVE(le, entry);
- qemu_free(le);
+ g_free(le);
}
- if (qemu_file_has_error(f))
- ret = -EIO;
+ if (ret == 0) {
+ ret = qemu_file_get_error(f);
+ }
return ret;
}
break;
}
}
- qemu_free(sn_tab);
+ g_free(sn_tab);
return ret;
}
bs = NULL;
while ((bs = bdrv_next(bs))) {
- if (bdrv_is_removable(bs) || bdrv_is_read_only(bs)) {
+ if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
continue;
}
return;
}
- saved_vm_running = vm_running;
- vm_stop(VMSTOP_SAVEVM);
+ saved_vm_running = runstate_is_running();
+ vm_stop(RUN_STATE_SAVE_VM);
memset(sn, 0, sizeof(*sn));
sn->date_sec = tv.tv_sec;
sn->date_nsec = tv.tv_usec * 1000;
#endif
- sn->vm_clock_nsec = qemu_get_clock(vm_clock);
+ sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock);
if (name) {
ret = bdrv_snapshot_find(bs, old_sn, name);
if (ret < 0) {
return ret;
} else if (sn.vm_state_size == 0) {
+ error_report("This is a disk-only snapshot. Revert to it offline "
+ "using qemu-img.");
return -EINVAL;
}
bs = NULL;
while ((bs = bdrv_next(bs))) {
- if (bdrv_is_removable(bs) || bdrv_is_read_only(bs)) {
+ if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
continue;
}
return -EINVAL;
}
+ qemu_system_reset(VMRESET_SILENT);
ret = qemu_loadvm_state(f);
qemu_fclose(f);
return;
}
- available_snapshots = qemu_mallocz(sizeof(int) * nb_sns);
+ available_snapshots = g_malloc0(sizeof(int) * nb_sns);
total = 0;
for (i = 0; i < nb_sns; i++) {
sn = &sn_tab[i];
monitor_printf(mon, "There is no suitable snapshot available\n");
}
- qemu_free(sn_tab);
- qemu_free(available_snapshots);
+ g_free(sn_tab);
+ g_free(available_snapshots);
}
projects / qemu.git / blobdiff