--- /dev/null
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2009-2015 Red Hat Inc
+ *
+ * Authors:
+ * Juan Quintela <quintela@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "config-host.h"
+#include "qemu-common.h"
+#include "hw/boards.h"
+#include "hw/hw.h"
+#include "hw/qdev.h"
+#include "net/net.h"
+#include "monitor/monitor.h"
+#include "sysemu/sysemu.h"
+#include "qemu/timer.h"
+#include "audio/audio.h"
+#include "migration/migration.h"
+#include "qapi/qmp/qerror.h"
+#include "qemu/error-report.h"
+#include "qemu/sockets.h"
+#include "qemu/queue.h"
+#include "sysemu/cpus.h"
+#include "exec/memory.h"
+#include "qmp-commands.h"
+#include "trace.h"
+#include "qemu/iov.h"
+#include "block/snapshot.h"
+#include "block/qapi.h"
+
+
+#ifndef ETH_P_RARP
+#define ETH_P_RARP 0x8035
+#endif
+#define ARP_HTYPE_ETH 0x0001
+#define ARP_PTYPE_IP 0x0800
+#define ARP_OP_REQUEST_REV 0x3
+
+static bool skip_section_footers;
+
+static int announce_self_create(uint8_t *buf,
+ uint8_t *mac_addr)
+{
+ /* Ethernet header. */
+ memset(buf, 0xff, 6); /* destination MAC addr */
+ memcpy(buf + 6, mac_addr, 6); /* source MAC addr */
+ *(uint16_t *)(buf + 12) = htons(ETH_P_RARP); /* ethertype */
+
+ /* RARP header. */
+ *(uint16_t *)(buf + 14) = htons(ARP_HTYPE_ETH); /* hardware addr space */
+ *(uint16_t *)(buf + 16) = htons(ARP_PTYPE_IP); /* protocol addr space */
+ *(buf + 18) = 6; /* hardware addr length (ethernet) */
+ *(buf + 19) = 4; /* protocol addr length (IPv4) */
+ *(uint16_t *)(buf + 20) = htons(ARP_OP_REQUEST_REV); /* opcode */
+ memcpy(buf + 22, mac_addr, 6); /* source hw addr */
+ memset(buf + 28, 0x00, 4); /* source protocol addr */
+ memcpy(buf + 32, mac_addr, 6); /* target hw addr */
+ memset(buf + 38, 0x00, 4); /* target protocol addr */
+
+ /* Padding to get up to 60 bytes (ethernet min packet size, minus FCS). */
+ memset(buf + 42, 0x00, 18);
+
+ return 60; /* len (FCS will be added by hardware) */
+}
+
+static void qemu_announce_self_iter(NICState *nic, void *opaque)
+{
+ uint8_t buf[60];
+ int len;
+
+ trace_qemu_announce_self_iter(qemu_ether_ntoa(&nic->conf->macaddr));
+ len = announce_self_create(buf, nic->conf->macaddr.a);
+
+ qemu_send_packet_raw(qemu_get_queue(nic), buf, len);
+}
+
+
+static void qemu_announce_self_once(void *opaque)
+{
+ static int count = SELF_ANNOUNCE_ROUNDS;
+ QEMUTimer *timer = *(QEMUTimer **)opaque;
+
+ qemu_foreach_nic(qemu_announce_self_iter, NULL);
+
+ if (--count) {
+ /* delay 50ms, 150ms, 250ms, ... */
+ timer_mod(timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) +
+ self_announce_delay(count));
+ } else {
+ timer_del(timer);
+ timer_free(timer);
+ }
+}
+
+void qemu_announce_self(void)
+{
+ static QEMUTimer *timer;
+ timer = timer_new_ms(QEMU_CLOCK_REALTIME, qemu_announce_self_once, &timer);
+ qemu_announce_self_once(&timer);
+}
+
+/***********************************************************/
+/* savevm/loadvm support */
+
+static ssize_t block_writev_buffer(void *opaque, struct iovec *iov, int iovcnt,
+ int64_t pos)
+{
+ int ret;
+ QEMUIOVector qiov;
+
+ qemu_iovec_init_external(&qiov, iov, iovcnt);
+ ret = bdrv_writev_vmstate(opaque, &qiov, pos);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return qiov.size;
+}
+
+static int block_put_buffer(void *opaque, const uint8_t *buf,
+ int64_t pos, int size)
+{
+ bdrv_save_vmstate(opaque, buf, pos, size);
+ return size;
+}
+
+static int block_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
+{
+ return bdrv_load_vmstate(opaque, buf, pos, size);
+}
+
+static int bdrv_fclose(void *opaque)
+{
+ return bdrv_flush(opaque);
+}
+
+static const QEMUFileOps bdrv_read_ops = {
+ .get_buffer = block_get_buffer,
+ .close = bdrv_fclose
+};
+
+static const QEMUFileOps bdrv_write_ops = {
+ .put_buffer = block_put_buffer,
+ .writev_buffer = block_writev_buffer,
+ .close = bdrv_fclose
+};
+
+static QEMUFile *qemu_fopen_bdrv(BlockDriverState *bs, int is_writable)
+{
+ if (is_writable) {
+ return qemu_fopen_ops(bs, &bdrv_write_ops);
+ }
+ return qemu_fopen_ops(bs, &bdrv_read_ops);
+}
+
+
+/* QEMUFile timer support.
+ * Not in qemu-file.c to not add qemu-timer.c as dependency to qemu-file.c
+ */
+
+void timer_put(QEMUFile *f, QEMUTimer *ts)
+{
+ uint64_t expire_time;
+
+ expire_time = timer_expire_time_ns(ts);
+ qemu_put_be64(f, expire_time);
+}
+
+void timer_get(QEMUFile *f, QEMUTimer *ts)
+{
+ uint64_t expire_time;
+
+ expire_time = qemu_get_be64(f);
+ if (expire_time != -1) {
+ timer_mod_ns(ts, expire_time);
+ } else {
+ timer_del(ts);
+ }
+}
+
+
+/* VMState timer support.
+ * Not in vmstate.c to not add qemu-timer.c as dependency to vmstate.c
+ */
+
+static int get_timer(QEMUFile *f, void *pv, size_t size)
+{
+ QEMUTimer *v = pv;
+ timer_get(f, v);
+ return 0;
+}
+
+static void put_timer(QEMUFile *f, void *pv, size_t size)
+{
+ QEMUTimer *v = pv;
+ timer_put(f, v);
+}
+
+const VMStateInfo vmstate_info_timer = {
+ .name = "timer",
+ .get = get_timer,
+ .put = put_timer,
+};
+
+
+typedef struct CompatEntry {
+ char idstr[256];
+ int instance_id;
+} CompatEntry;
+
+typedef struct SaveStateEntry {
+ QTAILQ_ENTRY(SaveStateEntry) entry;
+ char idstr[256];
+ int instance_id;
+ int alias_id;
+ int version_id;
+ int section_id;
+ SaveVMHandlers *ops;
+ const VMStateDescription *vmsd;
+ void *opaque;
+ CompatEntry *compat;
+ int is_ram;
+} SaveStateEntry;
+
+typedef struct SaveState {
+ QTAILQ_HEAD(, SaveStateEntry) handlers;
+ int global_section_id;
+ bool skip_configuration;
+ uint32_t len;
+ const char *name;
+} SaveState;
+
+static SaveState savevm_state = {
+ .handlers = QTAILQ_HEAD_INITIALIZER(savevm_state.handlers),
+ .global_section_id = 0,
+ .skip_configuration = false,
+};
+
+void savevm_skip_configuration(void)
+{
+ savevm_state.skip_configuration = true;
+}
+
+
+static void configuration_pre_save(void *opaque)
+{
+ SaveState *state = opaque;
+ const char *current_name = MACHINE_GET_CLASS(current_machine)->name;
+
+ state->len = strlen(current_name);
+ state->name = current_name;
+}
+
+static int configuration_post_load(void *opaque, int version_id)
+{
+ SaveState *state = opaque;
+ const char *current_name = MACHINE_GET_CLASS(current_machine)->name;
+
+ if (strncmp(state->name, current_name, state->len) != 0) {
+ error_report("Machine type received is '%s' and local is '%s'",
+ state->name, current_name);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static const VMStateDescription vmstate_configuration = {
+ .name = "configuration",
+ .version_id = 1,
+ .post_load = configuration_post_load,
+ .pre_save = configuration_pre_save,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(len, SaveState),
+ VMSTATE_VBUFFER_ALLOC_UINT32(name, SaveState, 0, NULL, 0, len),
+ VMSTATE_END_OF_LIST()
+ },
+};
+
+static void dump_vmstate_vmsd(FILE *out_file,
+ const VMStateDescription *vmsd, int indent,
+ bool is_subsection);
+
+static void dump_vmstate_vmsf(FILE *out_file, const VMStateField *field,
+ int indent)
+{
+ fprintf(out_file, "%*s{\n", indent, "");
+ indent += 2;
+ fprintf(out_file, "%*s\"field\": \"%s\",\n", indent, "", field->name);
+ fprintf(out_file, "%*s\"version_id\": %d,\n", indent, "",
+ field->version_id);
+ fprintf(out_file, "%*s\"field_exists\": %s,\n", indent, "",
+ field->field_exists ? "true" : "false");
+ fprintf(out_file, "%*s\"size\": %zu", indent, "", field->size);
+ if (field->vmsd != NULL) {
+ fprintf(out_file, ",\n");
+ dump_vmstate_vmsd(out_file, field->vmsd, indent, false);
+ }
+ fprintf(out_file, "\n%*s}", indent - 2, "");
+}
+
+static void dump_vmstate_vmss(FILE *out_file,
+ const VMStateDescription **subsection,
+ int indent)
+{
+ if (*subsection != NULL) {
+ dump_vmstate_vmsd(out_file, *subsection, indent, true);
+ }
+}
+
+static void dump_vmstate_vmsd(FILE *out_file,
+ const VMStateDescription *vmsd, int indent,
+ bool is_subsection)
+{
+ if (is_subsection) {
+ fprintf(out_file, "%*s{\n", indent, "");
+ } else {
+ fprintf(out_file, "%*s\"%s\": {\n", indent, "", "Description");
+ }
+ indent += 2;
+ fprintf(out_file, "%*s\"name\": \"%s\",\n", indent, "", vmsd->name);
+ fprintf(out_file, "%*s\"version_id\": %d,\n", indent, "",
+ vmsd->version_id);
+ fprintf(out_file, "%*s\"minimum_version_id\": %d", indent, "",
+ vmsd->minimum_version_id);
+ if (vmsd->fields != NULL) {
+ const VMStateField *field = vmsd->fields;
+ bool first;
+
+ fprintf(out_file, ",\n%*s\"Fields\": [\n", indent, "");
+ first = true;
+ while (field->name != NULL) {
+ if (field->flags & VMS_MUST_EXIST) {
+ /* Ignore VMSTATE_VALIDATE bits; these don't get migrated */
+ field++;
+ continue;
+ }
+ if (!first) {
+ fprintf(out_file, ",\n");
+ }
+ dump_vmstate_vmsf(out_file, field, indent + 2);
+ field++;
+ first = false;
+ }
+ fprintf(out_file, "\n%*s]", indent, "");
+ }
+ if (vmsd->subsections != NULL) {
+ const VMStateDescription **subsection = vmsd->subsections;
+ bool first;
+
+ fprintf(out_file, ",\n%*s\"Subsections\": [\n", indent, "");
+ first = true;
+ while (*subsection != NULL) {
+ if (!first) {
+ fprintf(out_file, ",\n");
+ }
+ dump_vmstate_vmss(out_file, subsection, indent + 2);
+ subsection++;
+ first = false;
+ }
+ fprintf(out_file, "\n%*s]", indent, "");
+ }
+ fprintf(out_file, "\n%*s}", indent - 2, "");
+}
+
+static void dump_machine_type(FILE *out_file)
+{
+ MachineClass *mc;
+
+ mc = MACHINE_GET_CLASS(current_machine);
+
+ fprintf(out_file, " \"vmschkmachine\": {\n");
+ fprintf(out_file, " \"Name\": \"%s\"\n", mc->name);
+ fprintf(out_file, " },\n");
+}
+
+void dump_vmstate_json_to_file(FILE *out_file)
+{
+ GSList *list, *elt;
+ bool first;
+
+ fprintf(out_file, "{\n");
+ dump_machine_type(out_file);
+
+ first = true;
+ list = object_class_get_list(TYPE_DEVICE, true);
+ for (elt = list; elt; elt = elt->next) {
+ DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, elt->data,
+ TYPE_DEVICE);
+ const char *name;
+ int indent = 2;
+
+ if (!dc->vmsd) {
+ continue;
+ }
+
+ if (!first) {
+ fprintf(out_file, ",\n");
+ }
+ name = object_class_get_name(OBJECT_CLASS(dc));
+ fprintf(out_file, "%*s\"%s\": {\n", indent, "", name);
+ indent += 2;
+ fprintf(out_file, "%*s\"Name\": \"%s\",\n", indent, "", name);
+ fprintf(out_file, "%*s\"version_id\": %d,\n", indent, "",
+ dc->vmsd->version_id);
+ fprintf(out_file, "%*s\"minimum_version_id\": %d,\n", indent, "",
+ dc->vmsd->minimum_version_id);
+
+ dump_vmstate_vmsd(out_file, dc->vmsd, indent, false);
+
+ fprintf(out_file, "\n%*s}", indent - 2, "");
+ first = false;
+ }
+ fprintf(out_file, "\n}\n");
+ fclose(out_file);
+}
+
+static int calculate_new_instance_id(const char *idstr)
+{
+ SaveStateEntry *se;
+ int instance_id = 0;
+
+ QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
+ if (strcmp(idstr, se->idstr) == 0
+ && instance_id <= se->instance_id) {
+ instance_id = se->instance_id + 1;
+ }
+ }
+ return instance_id;
+}
+
+static int calculate_compat_instance_id(const char *idstr)
+{
+ SaveStateEntry *se;
+ int instance_id = 0;
+
+ QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
+ if (!se->compat) {
+ continue;
+ }
+
+ if (strcmp(idstr, se->compat->idstr) == 0
+ && instance_id <= se->compat->instance_id) {
+ instance_id = se->compat->instance_id + 1;
+ }
+ }
+ return instance_id;
+}
+
+/* TODO: Individual devices generally have very little idea about the rest
+ of the system, so instance_id should be removed/replaced.
+ Meanwhile pass -1 as instance_id if you do not already have a clearly
+ distinguishing id for all instances of your device class. */
+int register_savevm_live(DeviceState *dev,
+ const char *idstr,
+ int instance_id,
+ int version_id,
+ SaveVMHandlers *ops,
+ void *opaque)
+{
+ SaveStateEntry *se;
+
+ se = g_malloc0(sizeof(SaveStateEntry));
+ se->version_id = version_id;
+ se->section_id = savevm_state.global_section_id++;
+ se->ops = ops;
+ se->opaque = opaque;
+ se->vmsd = NULL;
+ /* if this is a live_savem then set is_ram */
+ if (ops->save_live_setup != NULL) {
+ se->is_ram = 1;
+ }
+
+ if (dev) {
+ char *id = qdev_get_dev_path(dev);
+ if (id) {
+ pstrcpy(se->idstr, sizeof(se->idstr), id);
+ pstrcat(se->idstr, sizeof(se->idstr), "/");
+ g_free(id);
+
+ 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;
+ instance_id = -1;
+ }
+ }
+ pstrcat(se->idstr, sizeof(se->idstr), idstr);
+
+ if (instance_id == -1) {
+ se->instance_id = calculate_new_instance_id(se->idstr);
+ } else {
+ se->instance_id = instance_id;
+ }
+ assert(!se->compat || se->instance_id == 0);
+ /* add at the end of list */
+ QTAILQ_INSERT_TAIL(&savevm_state.handlers, se, entry);
+ return 0;
+}
+
+int register_savevm(DeviceState *dev,
+ const char *idstr,
+ int instance_id,
+ int version_id,
+ SaveStateHandler *save_state,
+ LoadStateHandler *load_state,
+ void *opaque)
+{
+ SaveVMHandlers *ops = g_malloc0(sizeof(SaveVMHandlers));
+ ops->save_state = save_state;
+ ops->load_state = load_state;
+ return register_savevm_live(dev, idstr, instance_id, version_id,
+ ops, opaque);
+}
+
+void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque)
+{
+ SaveStateEntry *se, *new_se;
+ char id[256] = "";
+
+ if (dev) {
+ char *path = qdev_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_SAFE(se, &savevm_state.handlers, entry, new_se) {
+ if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
+ QTAILQ_REMOVE(&savevm_state.handlers, se, entry);
+ if (se->compat) {
+ g_free(se->compat);
+ }
+ g_free(se->ops);
+ g_free(se);
+ }
+ }
+}
+
+int vmstate_register_with_alias_id(DeviceState *dev, int instance_id,
+ const VMStateDescription *vmsd,
+ void *opaque, int alias_id,
+ int required_for_version)
+{
+ SaveStateEntry *se;
+
+ /* If this triggers, alias support can be dropped for the vmsd. */
+ assert(alias_id == -1 || required_for_version >= vmsd->minimum_version_id);
+
+ se = g_malloc0(sizeof(SaveStateEntry));
+ se->version_id = vmsd->version_id;
+ se->section_id = savevm_state.global_section_id++;
+ se->opaque = opaque;
+ se->vmsd = vmsd;
+ se->alias_id = alias_id;
+
+ if (dev) {
+ char *id = qdev_get_dev_path(dev);
+ if (id) {
+ pstrcpy(se->idstr, sizeof(se->idstr), id);
+ pstrcat(se->idstr, sizeof(se->idstr), "/");
+ g_free(id);
+
+ 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;
+ instance_id = -1;
+ }
+ }
+ pstrcat(se->idstr, sizeof(se->idstr), vmsd->name);
+
+ if (instance_id == -1) {
+ se->instance_id = calculate_new_instance_id(se->idstr);
+ } else {
+ se->instance_id = instance_id;
+ }
+ assert(!se->compat || se->instance_id == 0);
+ /* add at the end of list */
+ QTAILQ_INSERT_TAIL(&savevm_state.handlers, se, entry);
+ return 0;
+}
+
+void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd,
+ void *opaque)
+{
+ SaveStateEntry *se, *new_se;
+
+ QTAILQ_FOREACH_SAFE(se, &savevm_state.handlers, entry, new_se) {
+ if (se->vmsd == vmsd && se->opaque == opaque) {
+ QTAILQ_REMOVE(&savevm_state.handlers, se, entry);
+ if (se->compat) {
+ g_free(se->compat);
+ }
+ g_free(se);
+ }
+ }
+}
+
+static int vmstate_load(QEMUFile *f, SaveStateEntry *se, int version_id)
+{
+ trace_vmstate_load(se->idstr, se->vmsd ? se->vmsd->name : "(old)");
+ if (!se->vmsd) { /* Old style */
+ return se->ops->load_state(f, se->opaque, version_id);
+ }
+ return vmstate_load_state(f, se->vmsd, se->opaque, version_id);
+}
+
+static void vmstate_save_old_style(QEMUFile *f, SaveStateEntry *se, QJSON *vmdesc)
+{
+ int64_t old_offset, size;
+
+ old_offset = qemu_ftell_fast(f);
+ se->ops->save_state(f, se->opaque);
+ size = qemu_ftell_fast(f) - old_offset;
+
+ if (vmdesc) {
+ json_prop_int(vmdesc, "size", size);
+ json_start_array(vmdesc, "fields");
+ json_start_object(vmdesc, NULL);
+ json_prop_str(vmdesc, "name", "data");
+ json_prop_int(vmdesc, "size", size);
+ json_prop_str(vmdesc, "type", "buffer");
+ json_end_object(vmdesc);
+ json_end_array(vmdesc);
+ }
+}
+
+static void vmstate_save(QEMUFile *f, SaveStateEntry *se, QJSON *vmdesc)
+{
+ trace_vmstate_save(se->idstr, se->vmsd ? se->vmsd->name : "(old)");
+ if (!se->vmsd) {
+ vmstate_save_old_style(f, se, vmdesc);
+ return;
+ }
+ vmstate_save_state(f, se->vmsd, se->opaque, vmdesc);
+}
+
+void savevm_skip_section_footers(void)
+{
+ skip_section_footers = true;
+}
+
+/*
+ * Write the header for device section (QEMU_VM_SECTION START/END/PART/FULL)
+ */
+static void save_section_header(QEMUFile *f, SaveStateEntry *se,
+ uint8_t section_type)
+{
+ qemu_put_byte(f, section_type);
+ qemu_put_be32(f, se->section_id);
+
+ if (section_type == QEMU_VM_SECTION_FULL ||
+ section_type == QEMU_VM_SECTION_START) {
+ /* ID string */
+ size_t 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);
+ }
+}
+
+/*
+ * Write a footer onto device sections that catches cases misformatted device
+ * sections.
+ */
+static void save_section_footer(QEMUFile *f, SaveStateEntry *se)
+{
+ if (!skip_section_footers) {
+ qemu_put_byte(f, QEMU_VM_SECTION_FOOTER);
+ qemu_put_be32(f, se->section_id);
+ }
+}
+
+bool qemu_savevm_state_blocked(Error **errp)
+{
+ SaveStateEntry *se;
+
+ QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
+ if (se->vmsd && se->vmsd->unmigratable) {
+ error_setg(errp, "State blocked by non-migratable device '%s'",
+ se->idstr);
+ return true;
+ }
+ }
+ return false;
+}
+
+void qemu_savevm_state_header(QEMUFile *f)
+{
+ trace_savevm_state_header();
+ qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
+ qemu_put_be32(f, QEMU_VM_FILE_VERSION);
+}
+
+void qemu_savevm_state_begin(QEMUFile *f,
+ const MigrationParams *params)
+{
+ SaveStateEntry *se;
+ int ret;
+
+ trace_savevm_state_begin();
+ QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
+ if (!se->ops || !se->ops->set_params) {
+ continue;
+ }
+ se->ops->set_params(params, se->opaque);
+ }
+
+ if (!savevm_state.skip_configuration) {
+ qemu_put_byte(f, QEMU_VM_CONFIGURATION);
+ vmstate_save_state(f, &vmstate_configuration, &savevm_state, 0);
+ }
+
+ QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
+ if (!se->ops || !se->ops->save_live_setup) {
+ continue;
+ }
+ if (se->ops && se->ops->is_active) {
+ if (!se->ops->is_active(se->opaque)) {
+ continue;
+ }
+ }
+ save_section_header(f, se, QEMU_VM_SECTION_START);
+
+ ret = se->ops->save_live_setup(f, se->opaque);
+ save_section_footer(f, se);
+ if (ret < 0) {
+ qemu_file_set_error(f, ret);
+ break;
+ }
+ }
+}
+
+/*
+ * 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(QEMUFile *f)
+{
+ SaveStateEntry *se;
+ int ret = 1;
+
+ trace_savevm_state_iterate();
+ QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
+ if (!se->ops || !se->ops->save_live_iterate) {
+ continue;
+ }
+ if (se->ops && se->ops->is_active) {
+ if (!se->ops->is_active(se->opaque)) {
+ continue;
+ }
+ }
+ if (qemu_file_rate_limit(f)) {
+ return 0;
+ }
+ trace_savevm_section_start(se->idstr, se->section_id);
+
+ save_section_header(f, se, QEMU_VM_SECTION_PART);
+
+ ret = se->ops->save_live_iterate(f, se->opaque);
+ trace_savevm_section_end(se->idstr, se->section_id, ret);
+ save_section_footer(f, se);
+
+ if (ret < 0) {
+ qemu_file_set_error(f, 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
+ synchronized over and over again. */
+ break;
+ }
+ }
+ return ret;
+}
+
+static bool should_send_vmdesc(void)
+{
+ MachineState *machine = MACHINE(qdev_get_machine());
+ return !machine->suppress_vmdesc;
+}
+
+void qemu_savevm_state_complete(QEMUFile *f)
+{
+ QJSON *vmdesc;
+ int vmdesc_len;
+ SaveStateEntry *se;
+ int ret;
+
+ trace_savevm_state_complete();
+
+ cpu_synchronize_all_states();
+
+ QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
+ if (!se->ops || !se->ops->save_live_complete) {
+ continue;
+ }
+ if (se->ops && se->ops->is_active) {
+ if (!se->ops->is_active(se->opaque)) {
+ continue;
+ }
+ }
+ trace_savevm_section_start(se->idstr, se->section_id);
+
+ save_section_header(f, se, QEMU_VM_SECTION_END);
+
+ ret = se->ops->save_live_complete(f, se->opaque);
+ trace_savevm_section_end(se->idstr, se->section_id, ret);
+ save_section_footer(f, se);
+ if (ret < 0) {
+ qemu_file_set_error(f, ret);
+ return;
+ }
+ }
+
+ vmdesc = qjson_new();
+ json_prop_int(vmdesc, "page_size", TARGET_PAGE_SIZE);
+ json_start_array(vmdesc, "devices");
+ QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
+
+ if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
+ continue;
+ }
+ if (se->vmsd && !vmstate_save_needed(se->vmsd, se->opaque)) {
+ trace_savevm_section_skip(se->idstr, se->section_id);
+ continue;
+ }
+
+ trace_savevm_section_start(se->idstr, se->section_id);
+
+ json_start_object(vmdesc, NULL);
+ json_prop_str(vmdesc, "name", se->idstr);
+ json_prop_int(vmdesc, "instance_id", se->instance_id);
+
+ save_section_header(f, se, QEMU_VM_SECTION_FULL);
+
+ vmstate_save(f, se, vmdesc);
+
+ json_end_object(vmdesc);
+ trace_savevm_section_end(se->idstr, se->section_id, 0);
+ save_section_footer(f, se);
+ }
+
+ qemu_put_byte(f, QEMU_VM_EOF);
+
+ json_end_array(vmdesc);
+ qjson_finish(vmdesc);
+ vmdesc_len = strlen(qjson_get_str(vmdesc));
+
+ if (should_send_vmdesc()) {
+ qemu_put_byte(f, QEMU_VM_VMDESCRIPTION);
+ qemu_put_be32(f, vmdesc_len);
+ qemu_put_buffer(f, (uint8_t *)qjson_get_str(vmdesc), vmdesc_len);
+ }
+ object_unref(OBJECT(vmdesc));
+
+ qemu_fflush(f);
+}
+
+uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size)
+{
+ SaveStateEntry *se;
+ uint64_t ret = 0;
+
+ QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
+ if (!se->ops || !se->ops->save_live_pending) {
+ continue;
+ }
+ if (se->ops && se->ops->is_active) {
+ if (!se->ops->is_active(se->opaque)) {
+ continue;
+ }
+ }
+ ret += se->ops->save_live_pending(f, se->opaque, max_size);
+ }
+ return ret;
+}
+
+void qemu_savevm_state_cancel(void)
+{
+ SaveStateEntry *se;
+
+ trace_savevm_state_cancel();
+ QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
+ if (se->ops && se->ops->cancel) {
+ se->ops->cancel(se->opaque);
+ }
+ }
+}
+
+static int qemu_savevm_state(QEMUFile *f, Error **errp)
+{
+ int ret;
+ MigrationParams params = {
+ .blk = 0,
+ .shared = 0
+ };
+
+ if (qemu_savevm_state_blocked(errp)) {
+ return -EINVAL;
+ }
+
+ qemu_mutex_unlock_iothread();
+ qemu_savevm_state_header(f);
+ qemu_savevm_state_begin(f, ¶ms);
+ qemu_mutex_lock_iothread();
+
+ while (qemu_file_get_error(f) == 0) {
+ if (qemu_savevm_state_iterate(f) > 0) {
+ break;
+ }
+ }
+
+ ret = qemu_file_get_error(f);
+ if (ret == 0) {
+ qemu_savevm_state_complete(f);
+ ret = qemu_file_get_error(f);
+ }
+ if (ret != 0) {
+ qemu_savevm_state_cancel();
+ error_setg_errno(errp, -ret, "Error while writing VM state");
+ }
+ 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_state.handlers, entry) {
+ if (se->is_ram) {
+ continue;
+ }
+ if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
+ continue;
+ }
+ if (se->vmsd && !vmstate_save_needed(se->vmsd, se->opaque)) {
+ continue;
+ }
+
+ save_section_header(f, se, QEMU_VM_SECTION_FULL);
+
+ vmstate_save(f, se, NULL);
+
+ save_section_footer(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;
+
+ QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
+ if (!strcmp(se->idstr, idstr) &&
+ (instance_id == se->instance_id ||
+ instance_id == se->alias_id))
+ return se;
+ /* Migrating from an older version? */
+ if (strstr(se->idstr, idstr) && se->compat) {
+ if (!strcmp(se->compat->idstr, idstr) &&
+ (instance_id == se->compat->instance_id ||
+ instance_id == se->alias_id))
+ return se;
+ }
+ }
+ return NULL;
+}
+
+struct LoadStateEntry {
+ QLIST_ENTRY(LoadStateEntry) entry;
+ SaveStateEntry *se;
+ int section_id;
+ int version_id;
+};
+
+/*
+ * Read a footer off the wire and check that it matches the expected section
+ *
+ * Returns: true if the footer was good
+ * false if there is a problem (and calls error_report to say why)
+ */
+static bool check_section_footer(QEMUFile *f, LoadStateEntry *le)
+{
+ uint8_t read_mark;
+ uint32_t read_section_id;
+
+ if (skip_section_footers) {
+ /* No footer to check */
+ return true;
+ }
+
+ read_mark = qemu_get_byte(f);
+
+ if (read_mark != QEMU_VM_SECTION_FOOTER) {
+ error_report("Missing section footer for %s", le->se->idstr);
+ return false;
+ }
+
+ read_section_id = qemu_get_be32(f);
+ if (read_section_id != le->section_id) {
+ error_report("Mismatched section id in footer for %s -"
+ " read 0x%x expected 0x%x",
+ le->se->idstr, read_section_id, le->section_id);
+ return false;
+ }
+
+ /* All good */
+ return true;
+}
+
+void loadvm_free_handlers(MigrationIncomingState *mis)
+{
+ LoadStateEntry *le, *new_le;
+
+ QLIST_FOREACH_SAFE(le, &mis->loadvm_handlers, entry, new_le) {
+ QLIST_REMOVE(le, entry);
+ g_free(le);
+ }
+}
+
+int qemu_loadvm_state(QEMUFile *f)
+{
+ MigrationIncomingState *mis = migration_incoming_get_current();
+ Error *local_err = NULL;
+ uint8_t section_type;
+ unsigned int v;
+ int ret;
+ int file_error_after_eof = -1;
+
+ if (qemu_savevm_state_blocked(&local_err)) {
+ error_report_err(local_err);
+ return -EINVAL;
+ }
+
+ v = qemu_get_be32(f);
+ if (v != QEMU_VM_FILE_MAGIC) {
+ error_report("Not a migration stream");
+ return -EINVAL;
+ }
+
+ v = qemu_get_be32(f);
+ if (v == QEMU_VM_FILE_VERSION_COMPAT) {
+ error_report("SaveVM v2 format is obsolete and don't work anymore");
+ return -ENOTSUP;
+ }
+ if (v != QEMU_VM_FILE_VERSION) {
+ error_report("Unsupported migration stream version");
+ return -ENOTSUP;
+ }
+
+ if (!savevm_state.skip_configuration) {
+ if (qemu_get_byte(f) != QEMU_VM_CONFIGURATION) {
+ error_report("Configuration section missing");
+ return -EINVAL;
+ }
+ ret = vmstate_load_state(f, &vmstate_configuration, &savevm_state, 0);
+
+ if (ret) {
+ return ret;
+ }
+ }
+
+ while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
+ uint32_t instance_id, version_id, section_id;
+ SaveStateEntry *se;
+ LoadStateEntry *le;
+ char idstr[256];
+
+ trace_qemu_loadvm_state_section(section_type);
+ switch (section_type) {
+ case QEMU_VM_SECTION_START:
+ case QEMU_VM_SECTION_FULL:
+ /* Read section start */
+ section_id = qemu_get_be32(f);
+ if (!qemu_get_counted_string(f, idstr)) {
+ error_report("Unable to read ID string for section %u",
+ section_id);
+ return -EINVAL;
+ }
+ instance_id = qemu_get_be32(f);
+ version_id = qemu_get_be32(f);
+
+ trace_qemu_loadvm_state_section_startfull(section_id, idstr,
+ instance_id, version_id);
+ /* Find savevm section */
+ se = find_se(idstr, instance_id);
+ if (se == NULL) {
+ error_report("Unknown savevm section or instance '%s' %d",
+ idstr, instance_id);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* Validate version */
+ if (version_id > se->version_id) {
+ error_report("savevm: unsupported version %d for '%s' v%d",
+ version_id, idstr, se->version_id);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* Add entry */
+ le = g_malloc0(sizeof(*le));
+
+ le->se = se;
+ le->section_id = section_id;
+ le->version_id = version_id;
+ QLIST_INSERT_HEAD(&mis->loadvm_handlers, le, entry);
+
+ ret = vmstate_load(f, le->se, le->version_id);
+ if (ret < 0) {
+ error_report("error while loading state for instance 0x%x of"
+ " device '%s'", instance_id, idstr);
+ goto out;
+ }
+ if (!check_section_footer(f, le)) {
+ ret = -EINVAL;
+ goto out;
+ }
+ break;
+ case QEMU_VM_SECTION_PART:
+ case QEMU_VM_SECTION_END:
+ section_id = qemu_get_be32(f);
+
+ trace_qemu_loadvm_state_section_partend(section_id);
+ QLIST_FOREACH(le, &mis->loadvm_handlers, entry) {
+ if (le->section_id == section_id) {
+ break;
+ }
+ }
+ if (le == NULL) {
+ error_report("Unknown savevm section %d", section_id);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = vmstate_load(f, le->se, le->version_id);
+ if (ret < 0) {
+ error_report("error while loading state section id %d(%s)",
+ section_id, le->se->idstr);
+ goto out;
+ }
+ if (!check_section_footer(f, le)) {
+ ret = -EINVAL;
+ goto out;
+ }
+ break;
+ default:
+ error_report("Unknown savevm section type %d", section_type);
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+
+ file_error_after_eof = qemu_file_get_error(f);
+
+ /*
+ * Try to read in the VMDESC section as well, so that dumping tools that
+ * intercept our migration stream have the chance to see it.
+ */
+
+ /* We've got to be careful; if we don't read the data and just shut the fd
+ * then the sender can error if we close while it's still sending.
+ * We also mustn't read data that isn't there; some transports (RDMA)
+ * will stall waiting for that data when the source has already closed.
+ */
+ if (should_send_vmdesc()) {
+ uint8_t *buf;
+ uint32_t size;
+ section_type = qemu_get_byte(f);
+
+ if (section_type != QEMU_VM_VMDESCRIPTION) {
+ error_report("Expected vmdescription section, but got %d",
+ section_type);
+ /*
+ * It doesn't seem worth failing at this point since
+ * we apparently have an otherwise valid VM state
+ */
+ } else {
+ buf = g_malloc(0x1000);
+ size = qemu_get_be32(f);
+
+ while (size > 0) {
+ uint32_t read_chunk = MIN(size, 0x1000);
+ qemu_get_buffer(f, buf, read_chunk);
+ size -= read_chunk;
+ }
+ g_free(buf);
+ }
+ }
+
+ cpu_synchronize_all_post_init();
+
+ ret = 0;
+
+out:
+ if (ret == 0) {
+ /* We may not have a VMDESC section, so ignore relative errors */
+ ret = file_error_after_eof;
+ }
+
+ return ret;
+}
+
+static BlockDriverState *find_vmstate_bs(void)
+{
+ BlockDriverState *bs = NULL;
+ while ((bs = bdrv_next(bs))) {
+ if (bdrv_can_snapshot(bs)) {
+ return bs;
+ }
+ }
+ return NULL;
+}
+
+/*
+ * Deletes snapshots of a given name in all opened images.
+ */
+static int del_existing_snapshots(Monitor *mon, const char *name)
+{
+ BlockDriverState *bs;
+ QEMUSnapshotInfo sn1, *snapshot = &sn1;
+ Error *err = NULL;
+
+ bs = NULL;
+ while ((bs = bdrv_next(bs))) {
+ if (bdrv_can_snapshot(bs) &&
+ bdrv_snapshot_find(bs, snapshot, name) >= 0) {
+ bdrv_snapshot_delete_by_id_or_name(bs, name, &err);
+ if (err) {
+ monitor_printf(mon,
+ "Error while deleting snapshot on device '%s':"
+ " %s\n",
+ bdrv_get_device_name(bs),
+ error_get_pretty(err));
+ error_free(err);
+ return -1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+void hmp_savevm(Monitor *mon, const QDict *qdict)
+{
+ BlockDriverState *bs, *bs1;
+ QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
+ int ret;
+ QEMUFile *f;
+ int saved_vm_running;
+ uint64_t vm_state_size;
+ qemu_timeval tv;
+ struct tm tm;
+ const char *name = qdict_get_try_str(qdict, "name");
+ Error *local_err = NULL;
+
+ /* Verify if there is a device that doesn't support snapshots and is writable */
+ bs = NULL;
+ while ((bs = bdrv_next(bs))) {
+
+ if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
+ continue;
+ }
+
+ if (!bdrv_can_snapshot(bs)) {
+ monitor_printf(mon, "Device '%s' is writable but does not support snapshots.\n",
+ bdrv_get_device_name(bs));
+ return;
+ }
+ }
+
+ bs = find_vmstate_bs();
+ if (!bs) {
+ monitor_printf(mon, "No block device can accept snapshots\n");
+ return;
+ }
+
+ saved_vm_running = runstate_is_running();
+
+ ret = global_state_store();
+ if (ret) {
+ monitor_printf(mon, "Error saving global state\n");
+ return;
+ }
+ vm_stop(RUN_STATE_SAVE_VM);
+
+ memset(sn, 0, sizeof(*sn));
+
+ /* fill auxiliary fields */
+ qemu_gettimeofday(&tv);
+ sn->date_sec = tv.tv_sec;
+ sn->date_nsec = tv.tv_usec * 1000;
+ sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+
+ if (name) {
+ ret = bdrv_snapshot_find(bs, old_sn, name);
+ if (ret >= 0) {
+ pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
+ pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
+ } else {
+ pstrcpy(sn->name, sizeof(sn->name), name);
+ }
+ } else {
+ /* cast below needed for OpenBSD where tv_sec is still 'long' */
+ localtime_r((const time_t *)&tv.tv_sec, &tm);
+ strftime(sn->name, sizeof(sn->name), "vm-%Y%m%d%H%M%S", &tm);
+ }
+
+ /* Delete old snapshots of the same name */
+ if (name && del_existing_snapshots(mon, name) < 0) {
+ goto the_end;
+ }
+
+ /* save the VM state */
+ f = qemu_fopen_bdrv(bs, 1);
+ if (!f) {
+ monitor_printf(mon, "Could not open VM state file\n");
+ goto the_end;
+ }
+ ret = qemu_savevm_state(f, &local_err);
+ vm_state_size = qemu_ftell(f);
+ qemu_fclose(f);
+ if (ret < 0) {
+ monitor_printf(mon, "%s\n", error_get_pretty(local_err));
+ error_free(local_err);
+ goto the_end;
+ }
+
+ /* create the snapshots */
+
+ bs1 = NULL;
+ while ((bs1 = bdrv_next(bs1))) {
+ if (bdrv_can_snapshot(bs1)) {
+ /* Write VM state size only to the image that contains the state */
+ sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
+ ret = bdrv_snapshot_create(bs1, sn);
+ if (ret < 0) {
+ monitor_printf(mon, "Error while creating snapshot on '%s'\n",
+ bdrv_get_device_name(bs1));
+ }
+ }
+ }
+
+ the_end:
+ if (saved_vm_running) {
+ 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);
+ global_state_store_running();
+
+ f = qemu_fopen(filename, "wb");
+ if (!f) {
+ error_setg_file_open(errp, errno, filename);
+ goto the_end;
+ }
+ ret = qemu_save_device_state(f);
+ qemu_fclose(f);
+ if (ret < 0) {
+ error_setg(errp, QERR_IO_ERROR);
+ }
+
+ the_end:
+ if (saved_vm_running) {
+ vm_start();
+ }
+}
+
+int load_vmstate(const char *name)
+{
+ BlockDriverState *bs, *bs_vm_state;
+ QEMUSnapshotInfo sn;
+ QEMUFile *f;
+ int ret;
+
+ bs_vm_state = find_vmstate_bs();
+ if (!bs_vm_state) {
+ error_report("No block device supports snapshots");
+ return -ENOTSUP;
+ }
+
+ /* Don't even try to load empty VM states */
+ ret = bdrv_snapshot_find(bs_vm_state, &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;
+ }
+
+ /* Verify if there is any device that doesn't support snapshots and is
+ writable and check if the requested snapshot is available too. */
+ bs = NULL;
+ while ((bs = bdrv_next(bs))) {
+
+ if (!bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
+ continue;
+ }
+
+ if (!bdrv_can_snapshot(bs)) {
+ error_report("Device '%s' is writable but does not support snapshots.",
+ bdrv_get_device_name(bs));
+ return -ENOTSUP;
+ }
+
+ ret = bdrv_snapshot_find(bs, &sn, name);
+ if (ret < 0) {
+ error_report("Device '%s' does not have the requested snapshot '%s'",
+ bdrv_get_device_name(bs), name);
+ return ret;
+ }
+ }
+
+ /* Flush all IO requests so they don't interfere with the new state. */
+ bdrv_drain_all();
+
+ bs = NULL;
+ while ((bs = bdrv_next(bs))) {
+ if (bdrv_can_snapshot(bs)) {
+ ret = bdrv_snapshot_goto(bs, name);
+ if (ret < 0) {
+ error_report("Error %d while activating snapshot '%s' on '%s'",
+ ret, name, bdrv_get_device_name(bs));
+ return ret;
+ }
+ }
+ }
+
+ /* restore the VM state */
+ f = qemu_fopen_bdrv(bs_vm_state, 0);
+ if (!f) {
+ error_report("Could not open VM state file");
+ return -EINVAL;
+ }
+
+ qemu_system_reset(VMRESET_SILENT);
+ migration_incoming_state_new(f);
+ ret = qemu_loadvm_state(f);
+
+ qemu_fclose(f);
+ migration_incoming_state_destroy();
+ if (ret < 0) {
+ error_report("Error %d while loading VM state", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+void hmp_delvm(Monitor *mon, const QDict *qdict)
+{
+ BlockDriverState *bs;
+ Error *err;
+ const char *name = qdict_get_str(qdict, "name");
+
+ if (!find_vmstate_bs()) {
+ monitor_printf(mon, "No block device supports snapshots\n");
+ return;
+ }
+
+ bs = NULL;
+ while ((bs = bdrv_next(bs))) {
+ if (bdrv_can_snapshot(bs)) {
+ err = NULL;
+ bdrv_snapshot_delete_by_id_or_name(bs, name, &err);
+ if (err) {
+ monitor_printf(mon,
+ "Error while deleting snapshot on device '%s':"
+ " %s\n",
+ bdrv_get_device_name(bs),
+ error_get_pretty(err));
+ error_free(err);
+ }
+ }
+ }
+}
+
+void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
+{
+ BlockDriverState *bs, *bs1;
+ QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s;
+ int nb_sns, i, ret, available;
+ int total;
+ int *available_snapshots;
+
+ bs = find_vmstate_bs();
+ if (!bs) {
+ monitor_printf(mon, "No available block device supports snapshots\n");
+ return;
+ }
+
+ nb_sns = bdrv_snapshot_list(bs, &sn_tab);
+ if (nb_sns < 0) {
+ monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
+ return;
+ }
+
+ if (nb_sns == 0) {
+ monitor_printf(mon, "There is no snapshot available.\n");
+ return;
+ }
+
+ available_snapshots = g_malloc0(sizeof(int) * nb_sns);
+ total = 0;
+ for (i = 0; i < nb_sns; i++) {
+ sn = &sn_tab[i];
+ available = 1;
+ bs1 = NULL;
+
+ while ((bs1 = bdrv_next(bs1))) {
+ if (bdrv_can_snapshot(bs1) && bs1 != bs) {
+ ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str);
+ if (ret < 0) {
+ available = 0;
+ break;
+ }
+ }
+ }
+
+ if (available) {
+ available_snapshots[total] = i;
+ total++;
+ }
+ }
+
+ if (total > 0) {
+ bdrv_snapshot_dump((fprintf_function)monitor_printf, mon, NULL);
+ monitor_printf(mon, "\n");
+ for (i = 0; i < total; i++) {
+ sn = &sn_tab[available_snapshots[i]];
+ bdrv_snapshot_dump((fprintf_function)monitor_printf, mon, sn);
+ monitor_printf(mon, "\n");
+ }
+ } else {
+ monitor_printf(mon, "There is no suitable snapshot available\n");
+ }
+
+ g_free(sn_tab);
+ 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)
+{
+ qemu_ram_unset_idstr(memory_region_get_ram_addr(mr) & TARGET_PAGE_MASK);
+}
+
+void vmstate_register_ram_global(MemoryRegion *mr)
+{
+ vmstate_register_ram(mr, NULL);
+}
Code Review / kvmfornfv.git / blobdiff