#include "qemu-queue.h"
#include "qemu-timer.h"
#include "cpus.h"
+#include "memory.h"
+#include "qmp-commands.h"
#define SELF_ANNOUNCE_ROUNDS 5
QEMUFileStdio *s = opaque;
int ret;
ret = pclose(s->stdio_file);
+ if (ret == -1) {
+ ret = -errno;
+ }
g_free(s);
return ret;
}
static int stdio_fclose(void *opaque)
{
QEMUFileStdio *s = opaque;
- fclose(s->stdio_file);
+ int ret = 0;
+ if (fclose(s->stdio_file) == EOF) {
+ ret = -errno;
+ }
g_free(s);
- return 0;
+ return ret;
}
QEMUFile *qemu_popen(FILE *stdio_file, const char *mode)
f->last_error = ret;
}
+/** Sets last_error conditionally
+ *
+ * Sets last_error only if ret is negative _and_ no error
+ * was set before.
+ */
+static void qemu_file_set_if_error(QEMUFile *f, int ret)
+{
+ if (ret < 0 && !f->last_error) {
+ qemu_file_set_error(f, ret);
+ }
+}
+
+/** Flushes QEMUFile buffer
+ *
+ * In case of error, last_error is set.
+ */
void qemu_fflush(QEMUFile *f)
{
if (!f->put_buffer)
if (len > 0)
f->buf_offset += f->buf_index;
else
- f->last_error = -EINVAL;
+ qemu_file_set_error(f, -EINVAL);
f->buf_index = 0;
}
}
} else if (len == 0) {
f->last_error = -EIO;
} else if (len != -EAGAIN)
- f->last_error = len;
+ qemu_file_set_error(f, len);
}
-int qemu_fclose(QEMUFile *f)
+/** Calls close function and set last_error if needed
+ *
+ * Internal function. qemu_fflush() must be called before this.
+ *
+ * Returns f->close() return value, or 0 if close function is not set.
+ */
+static int qemu_close(QEMUFile *f)
{
int ret = 0;
- qemu_fflush(f);
- if (f->close)
+ if (f->close) {
ret = f->close(f->opaque);
+ qemu_file_set_if_error(f, ret);
+ }
+ return ret;
+}
+
+/** Closes the file
+ *
+ * Returns negative error value if any error happened on previous operations or
+ * while closing the file. Returns 0 or positive number on success.
+ *
+ * The meaning of return value on success depends on the specific backend
+ * being used.
+ */
+int qemu_fclose(QEMUFile *f)
+{
+ int ret;
+ qemu_fflush(f);
+ ret = qemu_close(f);
+ /* If any error was spotted before closing, we should report it
+ * instead of the close() return value.
+ */
+ if (f->last_error) {
+ ret = f->last_error;
+ }
g_free(f);
return ret;
}
void *opaque;
CompatEntry *compat;
int no_migrate;
+ int is_ram;
} SaveStateEntry;
se->opaque = opaque;
se->vmsd = NULL;
se->no_migrate = 0;
+ /* if this is a live_savem then set is_ram */
+ if (save_live_state != NULL) {
+ se->is_ram = 1;
+ }
if (dev && dev->parent_bus && dev->parent_bus->info->get_dev_path) {
char *id = dev->parent_bus->info->get_dev_path(dev);
}
}
-/* 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), "/");
- g_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;
- }
- }
-}
-
int vmstate_register_with_alias_id(DeviceState *dev, int instance_id,
const VMStateDescription *vmsd,
void *opaque, int alias_id,
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) {
#define QEMU_VM_SECTION_FULL 0x04
#define QEMU_VM_SUBSECTION 0x05
-bool qemu_savevm_state_blocked(Monitor *mon)
+bool qemu_savevm_state_blocked(Error **errp)
{
SaveStateEntry *se;
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
if (se->no_migrate) {
- monitor_printf(mon, "state blocked by non-migratable device '%s'\n",
- se->idstr);
+ error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr);
return true;
}
}
return false;
}
-int qemu_savevm_state_begin(Monitor *mon, QEMUFile *f, int blk_enable,
- int shared)
+int qemu_savevm_state_begin(QEMUFile *f, int blk_enable, int shared)
{
SaveStateEntry *se;
int ret;
qemu_put_be32(f, se->instance_id);
qemu_put_be32(f, se->version_id);
- ret = se->save_live_state(mon, f, QEMU_VM_SECTION_START, se->opaque);
+ ret = se->save_live_state(f, QEMU_VM_SECTION_START, se->opaque);
if (ret < 0) {
- qemu_savevm_state_cancel(mon, f);
+ qemu_savevm_state_cancel(f);
return ret;
}
}
ret = qemu_file_get_error(f);
if (ret != 0) {
- qemu_savevm_state_cancel(mon, f);
+ qemu_savevm_state_cancel(f);
}
return ret;
}
/*
- * this funtion has three return values:
+ * this function 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)
+int qemu_savevm_state_iterate(QEMUFile *f)
{
SaveStateEntry *se;
int ret = 1;
qemu_put_byte(f, QEMU_VM_SECTION_PART);
qemu_put_be32(f, se->section_id);
- ret = se->save_live_state(mon, f, QEMU_VM_SECTION_PART, se->opaque);
+ ret = se->save_live_state(f, QEMU_VM_SECTION_PART, se->opaque);
if (ret <= 0) {
/* Do not proceed to the next vmstate before this one reported
completion of the current stage. This serializes the migration
}
ret = qemu_file_get_error(f);
if (ret != 0) {
- qemu_savevm_state_cancel(mon, f);
+ qemu_savevm_state_cancel(f);
}
return ret;
}
-int qemu_savevm_state_complete(Monitor *mon, QEMUFile *f)
+int qemu_savevm_state_complete(QEMUFile *f)
{
SaveStateEntry *se;
int ret;
qemu_put_byte(f, QEMU_VM_SECTION_END);
qemu_put_be32(f, se->section_id);
- ret = se->save_live_state(mon, f, QEMU_VM_SECTION_END, se->opaque);
+ ret = se->save_live_state(f, QEMU_VM_SECTION_END, se->opaque);
if (ret < 0) {
return ret;
}
return qemu_file_get_error(f);
}
-void qemu_savevm_state_cancel(Monitor *mon, QEMUFile *f)
+void qemu_savevm_state_cancel(QEMUFile *f)
{
SaveStateEntry *se;
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
if (se->save_live_state) {
- se->save_live_state(mon, f, -1, se->opaque);
+ se->save_live_state(f, -1, se->opaque);
}
}
}
-static int qemu_savevm_state(Monitor *mon, QEMUFile *f)
+static int qemu_savevm_state(QEMUFile *f)
{
int ret;
- if (qemu_savevm_state_blocked(mon)) {
+ if (qemu_savevm_state_blocked(NULL)) {
ret = -EINVAL;
goto out;
}
- ret = qemu_savevm_state_begin(mon, f, 0, 0);
+ ret = qemu_savevm_state_begin(f, 0, 0);
if (ret < 0)
goto out;
do {
- ret = qemu_savevm_state_iterate(mon, f);
+ ret = qemu_savevm_state_iterate(f);
if (ret < 0)
goto out;
} while (ret == 0);
- ret = qemu_savevm_state_complete(mon, f);
+ ret = qemu_savevm_state_complete(f);
out:
if (ret == 0) {
return ret;
}
+static int qemu_save_device_state(QEMUFile *f)
+{
+ SaveStateEntry *se;
+
+ qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
+ qemu_put_be32(f, QEMU_VM_FILE_VERSION);
+
+ cpu_synchronize_all_states();
+
+ QTAILQ_FOREACH(se, &savevm_handlers, entry) {
+ int len;
+
+ if (se->is_ram) {
+ continue;
+ }
+ if (se->save_state == NULL && se->vmsd == NULL) {
+ continue;
+ }
+
+ /* Section type */
+ qemu_put_byte(f, QEMU_VM_SECTION_FULL);
+ qemu_put_be32(f, se->section_id);
+
+ /* ID string */
+ len = strlen(se->idstr);
+ qemu_put_byte(f, len);
+ qemu_put_buffer(f, (uint8_t *)se->idstr, len);
+
+ qemu_put_be32(f, se->instance_id);
+ qemu_put_be32(f, se->version_id);
+
+ vmstate_save(f, se);
+ }
+
+ qemu_put_byte(f, QEMU_VM_EOF);
+
+ return qemu_file_get_error(f);
+}
+
static SaveStateEntry *find_se(const char *idstr, int instance_id)
{
SaveStateEntry *se;
unsigned int v;
int ret;
- if (qemu_savevm_state_blocked(default_mon)) {
+ if (qemu_savevm_state_blocked(NULL)) {
return -EINVAL;
}
int ret;
QEMUFile *f;
int saved_vm_running;
- uint32_t vm_state_size;
+ uint64_t vm_state_size;
#ifdef _WIN32
struct _timeb tb;
struct tm *ptm;
}
} else {
#ifdef _WIN32
- ptm = localtime(&tb.time);
+ time_t t = tb.time;
+ ptm = localtime(&t);
strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", ptm);
#else
/* cast below needed for OpenBSD where tv_sec is still 'long' */
monitor_printf(mon, "Could not open VM state file\n");
goto the_end;
}
- ret = qemu_savevm_state(mon, f);
+ ret = qemu_savevm_state(f);
vm_state_size = qemu_ftell(f);
qemu_fclose(f);
if (ret < 0) {
vm_start();
}
+void qmp_xen_save_devices_state(const char *filename, Error **errp)
+{
+ QEMUFile *f;
+ int saved_vm_running;
+ int ret;
+
+ saved_vm_running = runstate_is_running();
+ vm_stop(RUN_STATE_SAVE_VM);
+
+ f = qemu_fopen(filename, "wb");
+ if (!f) {
+ error_set(errp, QERR_OPEN_FILE_FAILED, filename);
+ goto the_end;
+ }
+ ret = qemu_save_device_state(f);
+ qemu_fclose(f);
+ if (ret < 0) {
+ error_set(errp, QERR_IO_ERROR);
+ }
+
+ the_end:
+ if (saved_vm_running)
+ vm_start();
+ return;
+}
+
int load_vmstate(const char *name)
{
BlockDriverState *bs, *bs_vm_state;
}
/* Flush all IO requests so they don't interfere with the new state. */
- qemu_aio_flush();
+ bdrv_drain_all();
bs = NULL;
while ((bs = bdrv_next(bs))) {
g_free(available_snapshots);
}
+
+void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev)
+{
+ qemu_ram_set_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK,
+ memory_region_name(mr), dev);
+}
+
+void vmstate_unregister_ram(MemoryRegion *mr, DeviceState *dev)
+{
+ /* Nothing do to while the implementation is in RAMBlock */
+}
+
+void vmstate_register_ram_global(MemoryRegion *mr)
+{
+ vmstate_register_ram(mr, NULL);
+}
projects / qemu.git / blobdiff