vmstate.c - qemu-android - Git at Google

 #include "qemu-common.h"
 #include "migration/migration.h"
 #include "migration/qemu-file.h"
 #include "migration/vmstate.h"
 #include "qemu/bitops.h"
 #include "trace.h"

 static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
                                     void *opaque);
 static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
                                    void *opaque);

 static int vmstate_n_elems(void *opaque, VMStateField *field)
 {
     int n_elems = 1;

     if (field->flags & VMS_ARRAY) {
         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 = *(uint8_t *)(opaque+field->num_offset);
     }

     return n_elems;
 }

 static int vmstate_size(void *opaque, VMStateField *field)
 {
     int size = field->size;

     if (field->flags & VMS_VBUFFER) {
         size = *(int32_t *)(opaque+field->size_offset);
         if (field->flags & VMS_MULTIPLY) {
             size *= field->size;
         }
     }

     return size;
 }

 static void *vmstate_base_addr(void *opaque, VMStateField *field)
 {
     void *base_addr = opaque + field->offset;

     if (field->flags & VMS_POINTER) {
         base_addr = *(void **)base_addr + field->start;
     }

     return base_addr;
 }

 int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd,
                        void *opaque, int version_id)
 {
     VMStateField *field = vmsd->fields;
     int ret;

     if (version_id > vmsd->version_id) {
         return -EINVAL;
     }
     if  (version_id < vmsd->minimum_version_id) {
         if (vmsd->load_state_old &&
             version_id >= vmsd->minimum_version_id_old) {
             return vmsd->load_state_old(f, opaque, version_id);
         }
         return -EINVAL;
     }
     if (vmsd->pre_load) {
         int ret = vmsd->pre_load(opaque);
         if (ret) {
             return ret;
         }
     }
     while (field->name) {
         if ((field->field_exists &&
              field->field_exists(opaque, version_id)) ||
             (!field->field_exists &&
              field->version_id <= version_id)) {
             void *base_addr = vmstate_base_addr(opaque, field);
             int i, n_elems = vmstate_n_elems(opaque, field);
             int size = vmstate_size(opaque, field);

             for (i = 0; i < n_elems; i++) {
                 void *addr = base_addr + size * i;

                 if (field->flags & VMS_ARRAY_OF_POINTER) {
                     addr = *(void **)addr;
                 }
                 if (field->flags & VMS_STRUCT) {
                     ret = vmstate_load_state(f, field->vmsd, addr,
                                              field->vmsd->version_id);
                 } else {
                     ret = field->info->get(f, addr, size);

                 }
                 if (ret < 0) {
                     trace_vmstate_load_field_error(field->name, ret);
                     return ret;
                 }
             }
         } else if (field->flags & VMS_MUST_EXIST) {
             fprintf(stderr, "Input validation failed: %s/%s\n",
                     vmsd->name, field->name);
             return -1;
         }
         field++;
     }
     ret = vmstate_subsection_load(f, vmsd, opaque);
     if (ret != 0) {
         return ret;
     }
     if (vmsd->post_load) {
         return vmsd->post_load(opaque, version_id);
     }
     return 0;
 }

 void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd,
                         void *opaque)
 {
     VMStateField *field = vmsd->fields;

     if (vmsd->pre_save) {
         vmsd->pre_save(opaque);
     }
     while (field->name) {
         if (!field->field_exists ||
             field->field_exists(opaque, vmsd->version_id)) {
             void *base_addr = vmstate_base_addr(opaque, field);
             int i, n_elems = vmstate_n_elems(opaque, field);
             int size = vmstate_size(opaque, field);

             for (i = 0; i < n_elems; i++) {
                 void *addr = base_addr + size * i;

                 if (field->flags & VMS_ARRAY_OF_POINTER) {
                     addr = *(void **)addr;
                 }
                 if (field->flags & VMS_STRUCT) {
                     vmstate_save_state(f, field->vmsd, addr);
                 } else {
                     field->info->put(f, addr, size);
                 }
             }
         } else {
             if (field->flags & VMS_MUST_EXIST) {
                 fprintf(stderr, "Output state validation failed: %s/%s\n",
                         vmsd->name, field->name);
                 assert(!(field->flags & VMS_MUST_EXIST));
             }
         }
         field++;
     }
     vmstate_subsection_save(f, vmsd, opaque);
 }

 static const VMStateDescription *
     vmstate_get_subsection(const VMStateSubsection *sub, char *idstr)
 {
     while (sub && sub->needed) {
         if (strcmp(idstr, sub->vmsd->name) == 0) {
             return sub->vmsd;
         }
         sub++;
     }
     return NULL;
 }

 static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd,
                                    void *opaque)
 {
     while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) {
         char idstr[256];
         int ret;
         uint8_t version_id, len, size;
         const VMStateDescription *sub_vmsd;

         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;

         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;
         }
         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;
         }
     }
     return 0;
 }

 static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
                                     void *opaque)
 {
     const VMStateSubsection *sub = vmsd->subsections;

     while (sub && sub->needed) {
         if (sub->needed(opaque)) {
             const VMStateDescription *vmsd = sub->vmsd;
             uint8_t len;

             qemu_put_byte(f, QEMU_VM_SUBSECTION);
             len = strlen(vmsd->name);
             qemu_put_byte(f, len);
             qemu_put_buffer(f, (uint8_t *)vmsd->name, len);
             qemu_put_be32(f, vmsd->version_id);
             vmstate_save_state(f, vmsd, opaque);
         }
         sub++;
     }
 }

 /* bool */

 static int get_bool(QEMUFile *f, void *pv, size_t size)
 {
     bool *v = pv;
     *v = qemu_get_byte(f);
     return 0;
 }

 static void put_bool(QEMUFile *f, void *pv, size_t size)
 {
     bool *v = pv;
     qemu_put_byte(f, *v);
 }

 const VMStateInfo vmstate_info_bool = {
     .name = "bool",
     .get  = get_bool,
     .put  = put_bool,
 };

 /* 8 bit int */

 static int get_int8(QEMUFile *f, void *pv, size_t size)
 {
     int8_t *v = pv;
     qemu_get_s8s(f, v);
     return 0;
 }

 static void put_int8(QEMUFile *f, void *pv, size_t size)
 {
     int8_t *v = pv;
     qemu_put_s8s(f, v);
 }

 const VMStateInfo vmstate_info_int8 = {
     .name = "int8",
     .get  = get_int8,
     .put  = put_int8,
 };

 /* 16 bit int */

 static int get_int16(QEMUFile *f, void *pv, size_t size)
 {
     int16_t *v = pv;
     qemu_get_sbe16s(f, v);
     return 0;
 }

 static void put_int16(QEMUFile *f, void *pv, size_t size)
 {
     int16_t *v = pv;
     qemu_put_sbe16s(f, v);
 }

 const VMStateInfo vmstate_info_int16 = {
     .name = "int16",
     .get  = get_int16,
     .put  = put_int16,
 };

 /* 32 bit int */

 static int get_int32(QEMUFile *f, void *pv, size_t size)
 {
     int32_t *v = pv;
     qemu_get_sbe32s(f, v);
     return 0;
 }

 static void put_int32(QEMUFile *f, void *pv, size_t size)
 {
     int32_t *v = pv;
     qemu_put_sbe32s(f, v);
 }

 const VMStateInfo vmstate_info_int32 = {
     .name = "int32",
     .get  = get_int32,
     .put  = put_int32,
 };

 /* 32 bit int. See that the received value is the same than the one
    in the field */

 static int get_int32_equal(QEMUFile *f, void *pv, size_t size)
 {
     int32_t *v = pv;
     int32_t v2;
     qemu_get_sbe32s(f, &v2);

     if (*v == v2) {
         return 0;
     }
     return -EINVAL;
 }

 const VMStateInfo vmstate_info_int32_equal = {
     .name = "int32 equal",
     .get  = get_int32_equal,
     .put  = put_int32,
 };

 /* 32 bit int. Check that the received value is non-negative
  * and less than or equal to the one in the field.
  */

 static int get_int32_le(QEMUFile *f, void *pv, size_t size)
 {
     int32_t *cur = pv;
     int32_t loaded;
     qemu_get_sbe32s(f, &loaded);

     if (loaded >= 0 && loaded <= *cur) {
         *cur = loaded;
         return 0;
     }
     return -EINVAL;
 }

 const VMStateInfo vmstate_info_int32_le = {
     .name = "int32 le",
     .get  = get_int32_le,
     .put  = put_int32,
 };

 /* 64 bit int */

 static int get_int64(QEMUFile *f, void *pv, size_t size)
 {
     int64_t *v = pv;
     qemu_get_sbe64s(f, v);
     return 0;
 }

 static void put_int64(QEMUFile *f, void *pv, size_t size)
 {
     int64_t *v = pv;
     qemu_put_sbe64s(f, v);
 }

 const VMStateInfo vmstate_info_int64 = {
     .name = "int64",
     .get  = get_int64,
     .put  = put_int64,
 };

 /* 8 bit unsigned int */

 static int get_uint8(QEMUFile *f, void *pv, size_t size)
 {
     uint8_t *v = pv;
     qemu_get_8s(f, v);
     return 0;
 }

 static void put_uint8(QEMUFile *f, void *pv, size_t size)
 {
     uint8_t *v = pv;
     qemu_put_8s(f, v);
 }

 const VMStateInfo vmstate_info_uint8 = {
     .name = "uint8",
     .get  = get_uint8,
     .put  = put_uint8,
 };

 /* 16 bit unsigned int */

 static int get_uint16(QEMUFile *f, void *pv, size_t size)
 {
     uint16_t *v = pv;
     qemu_get_be16s(f, v);
     return 0;
 }

 static void put_uint16(QEMUFile *f, void *pv, size_t size)
 {
     uint16_t *v = pv;
     qemu_put_be16s(f, v);
 }

 const VMStateInfo vmstate_info_uint16 = {
     .name = "uint16",
     .get  = get_uint16,
     .put  = put_uint16,
 };

 /* 32 bit unsigned int */

 static int get_uint32(QEMUFile *f, void *pv, size_t size)
 {
     uint32_t *v = pv;
     qemu_get_be32s(f, v);
     return 0;
 }

 static void put_uint32(QEMUFile *f, void *pv, size_t size)
 {
     uint32_t *v = pv;
     qemu_put_be32s(f, v);
 }

 const VMStateInfo vmstate_info_uint32 = {
     .name = "uint32",
     .get  = get_uint32,
     .put  = put_uint32,
 };

 /* 32 bit uint. See that the received value is the same than the one
    in the field */

 static int get_uint32_equal(QEMUFile *f, void *pv, size_t size)
 {
     uint32_t *v = pv;
     uint32_t v2;
     qemu_get_be32s(f, &v2);

     if (*v == v2) {
         return 0;
     }
     return -EINVAL;
 }

 const VMStateInfo vmstate_info_uint32_equal = {
     .name = "uint32 equal",
     .get  = get_uint32_equal,
     .put  = put_uint32,
 };

 /* 64 bit unsigned int */

 static int get_uint64(QEMUFile *f, void *pv, size_t size)
 {
     uint64_t *v = pv;
     qemu_get_be64s(f, v);
     return 0;
 }

 static void put_uint64(QEMUFile *f, void *pv, size_t size)
 {
     uint64_t *v = pv;
     qemu_put_be64s(f, v);
 }

 const VMStateInfo vmstate_info_uint64 = {
     .name = "uint64",
     .get  = get_uint64,
     .put  = put_uint64,
 };

 /* 64 bit unsigned int. See that the received value is the same than the one
    in the field */

 static int get_uint64_equal(QEMUFile *f, void *pv, size_t size)
 {
     uint64_t *v = pv;
     uint64_t v2;
     qemu_get_be64s(f, &v2);

     if (*v == v2) {
         return 0;
     }
     return -EINVAL;
 }

 const VMStateInfo vmstate_info_uint64_equal = {
     .name = "int64 equal",
     .get  = get_uint64_equal,
     .put  = put_uint64,
 };

 /* 8 bit int. See that the received value is the same than the one
    in the field */

 static int get_uint8_equal(QEMUFile *f, void *pv, size_t size)
 {
     uint8_t *v = pv;
     uint8_t v2;
     qemu_get_8s(f, &v2);

     if (*v == v2) {
         return 0;
     }
     return -EINVAL;
 }

 const VMStateInfo vmstate_info_uint8_equal = {
     .name = "uint8 equal",
     .get  = get_uint8_equal,
     .put  = put_uint8,
 };

 /* 16 bit unsigned int int. See that the received value is the same than the one
    in the field */

 static int get_uint16_equal(QEMUFile *f, void *pv, size_t size)
 {
     uint16_t *v = pv;
     uint16_t v2;
     qemu_get_be16s(f, &v2);

     if (*v == v2) {
         return 0;
     }
     return -EINVAL;
 }

 const VMStateInfo vmstate_info_uint16_equal = {
     .name = "uint16 equal",
     .get  = get_uint16_equal,
     .put  = put_uint16,
 };

 /* floating point */

 static int get_float64(QEMUFile *f, void *pv, size_t size)
 {
     float64 *v = pv;

     *v = make_float64(qemu_get_be64(f));
     return 0;
 }

 static void put_float64(QEMUFile *f, void *pv, size_t size)
 {
     uint64_t *v = pv;

     qemu_put_be64(f, float64_val(*v));
 }

 const VMStateInfo vmstate_info_float64 = {
     .name = "float64",
     .get  = get_float64,
     .put  = put_float64,
 };

 /* uint8_t buffers */

 static int get_buffer(QEMUFile *f, void *pv, size_t size)
 {
     uint8_t *v = pv;
     qemu_get_buffer(f, v, size);
     return 0;
 }

 static void put_buffer(QEMUFile *f, void *pv, size_t size)
 {
     uint8_t *v = pv;
     qemu_put_buffer(f, v, size);
 }

 const VMStateInfo vmstate_info_buffer = {
     .name = "buffer",
     .get  = get_buffer,
     .put  = put_buffer,
 };

 /* unused buffers: space that was used for some fields that are
    not useful anymore */

 static int get_unused_buffer(QEMUFile *f, void *pv, size_t size)
 {
     uint8_t buf[1024];
     int block_len;

     while (size > 0) {
         block_len = MIN(sizeof(buf), size);
         size -= block_len;
         qemu_get_buffer(f, buf, block_len);
     }
    return 0;
 }

 static void put_unused_buffer(QEMUFile *f, void *pv, size_t size)
 {
     static const uint8_t buf[1024];
     int block_len;

     while (size > 0) {
         block_len = MIN(sizeof(buf), size);
         size -= block_len;
         qemu_put_buffer(f, buf, block_len);
     }
 }

 const VMStateInfo vmstate_info_unused_buffer = {
     .name = "unused_buffer",
     .get  = get_unused_buffer,
     .put  = put_unused_buffer,
 };

 /* bitmaps (as defined by bitmap.h). Note that size here is the size
  * of the bitmap in bits. The on-the-wire format of a bitmap is 64
  * bit words with the bits in big endian order. The in-memory format
  * is an array of 'unsigned long', which may be either 32 or 64 bits.
  */
 /* This is the number of 64 bit words sent over the wire */
 #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64)
 static int get_bitmap(QEMUFile *f, void *pv, size_t size)
 {
     unsigned long *bmp = pv;
     int i, idx = 0;
     for (i = 0; i < BITS_TO_U64S(size); i++) {
         uint64_t w = qemu_get_be64(f);
         bmp[idx++] = w;
         if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) {
             bmp[idx++] = w >> 32;
         }
     }
     return 0;
 }

 static void put_bitmap(QEMUFile *f, void *pv, size_t size)
 {
     unsigned long *bmp = pv;
     int i, idx = 0;
     for (i = 0; i < BITS_TO_U64S(size); i++) {
         uint64_t w = bmp[idx++];
         if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) {
             w |= ((uint64_t)bmp[idx++]) << 32;
         }
         qemu_put_be64(f, w);
     }
 }

 const VMStateInfo vmstate_info_bitmap = {
     .name = "bitmap",
     .get = get_bitmap,
     .put = put_bitmap,
 };
	#include "qemu-common.h"
	#include "migration/migration.h"
	#include "migration/qemu-file.h"
	#include "migration/vmstate.h"
	#include "qemu/bitops.h"
	#include "trace.h"

	static void vmstate_subsection_save(QEMUFile f, const VMStateDescription vmsd,
	void *opaque);
	static int vmstate_subsection_load(QEMUFile f, const VMStateDescription vmsd,
	void *opaque);

	static int vmstate_n_elems(void opaque, VMStateField field)
	{
	int n_elems = 1;

	if (field->flags & VMS_ARRAY) {
	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 = (uint8_t )(opaque+field->num_offset);
	}

	return n_elems;
	}

	static int vmstate_size(void opaque, VMStateField field)
	{
	int size = field->size;

	if (field->flags & VMS_VBUFFER) {
	size = (int32_t )(opaque+field->size_offset);
	if (field->flags & VMS_MULTIPLY) {
	size *= field->size;
	}
	}

	return size;
	}

	static void vmstate_base_addr(void opaque, VMStateField *field)
	{
	void *base_addr = opaque + field->offset;

	if (field->flags & VMS_POINTER) {
	base_addr = (void *)base_addr + field->start;
	}

	return base_addr;
	}

	int vmstate_load_state(QEMUFile f, const VMStateDescription vmsd,
	void *opaque, int version_id)
	{
	VMStateField *field = vmsd->fields;
	int ret;

	if (version_id > vmsd->version_id) {
	return -EINVAL;
	}
	if (version_id < vmsd->minimum_version_id) {
	if (vmsd->load_state_old &&
	version_id >= vmsd->minimum_version_id_old) {
	return vmsd->load_state_old(f, opaque, version_id);
	}
	return -EINVAL;
	}
	if (vmsd->pre_load) {
	int ret = vmsd->pre_load(opaque);
	if (ret) {
	return ret;
	}
	}
	while (field->name) {
	if ((field->field_exists &&
	field->field_exists(opaque, version_id)) \|\|
	(!field->field_exists &&
	field->version_id <= version_id)) {
	void *base_addr = vmstate_base_addr(opaque, field);
	int i, n_elems = vmstate_n_elems(opaque, field);
	int size = vmstate_size(opaque, field);

	for (i = 0; i < n_elems; i++) {
	void addr = base_addr + size i;

	if (field->flags & VMS_ARRAY_OF_POINTER) {
	addr = (void *)addr;
	}
	if (field->flags & VMS_STRUCT) {
	ret = vmstate_load_state(f, field->vmsd, addr,
	field->vmsd->version_id);
	} else {
	ret = field->info->get(f, addr, size);

	}
	if (ret < 0) {
	trace_vmstate_load_field_error(field->name, ret);
	return ret;
	}
	}
	} else if (field->flags & VMS_MUST_EXIST) {
	fprintf(stderr, "Input validation failed: %s/%s\n",
	vmsd->name, field->name);
	return -1;
	}
	field++;
	}
	ret = vmstate_subsection_load(f, vmsd, opaque);
	if (ret != 0) {
	return ret;
	}
	if (vmsd->post_load) {
	return vmsd->post_load(opaque, version_id);
	}
	return 0;
	}

	void vmstate_save_state(QEMUFile f, const VMStateDescription vmsd,
	void *opaque)
	{
	VMStateField *field = vmsd->fields;

	if (vmsd->pre_save) {
	vmsd->pre_save(opaque);
	}
	while (field->name) {
	if (!field->field_exists \|\|
	field->field_exists(opaque, vmsd->version_id)) {
	void *base_addr = vmstate_base_addr(opaque, field);
	int i, n_elems = vmstate_n_elems(opaque, field);
	int size = vmstate_size(opaque, field);

	for (i = 0; i < n_elems; i++) {
	void addr = base_addr + size i;

	if (field->flags & VMS_ARRAY_OF_POINTER) {
	addr = (void *)addr;
	}
	if (field->flags & VMS_STRUCT) {
	vmstate_save_state(f, field->vmsd, addr);
	} else {
	field->info->put(f, addr, size);
	}
	}
	} else {
	if (field->flags & VMS_MUST_EXIST) {
	fprintf(stderr, "Output state validation failed: %s/%s\n",
	vmsd->name, field->name);
	assert(!(field->flags & VMS_MUST_EXIST));
	}
	}
	field++;
	}
	vmstate_subsection_save(f, vmsd, opaque);
	}

	static const VMStateDescription *
	vmstate_get_subsection(const VMStateSubsection sub, char idstr)
	{
	while (sub && sub->needed) {
	if (strcmp(idstr, sub->vmsd->name) == 0) {
	return sub->vmsd;
	}
	sub++;
	}
	return NULL;
	}

	static int vmstate_subsection_load(QEMUFile f, const VMStateDescription vmsd,
	void *opaque)
	{
	while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) {
	char idstr[256];
	int ret;
	uint8_t version_id, len, size;
	const VMStateDescription *sub_vmsd;

	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;

	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;
	}
	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;
	}
	}
	return 0;
	}

	static void vmstate_subsection_save(QEMUFile f, const VMStateDescription vmsd,
	void *opaque)
	{
	const VMStateSubsection *sub = vmsd->subsections;

	while (sub && sub->needed) {
	if (sub->needed(opaque)) {
	const VMStateDescription *vmsd = sub->vmsd;
	uint8_t len;

	qemu_put_byte(f, QEMU_VM_SUBSECTION);
	len = strlen(vmsd->name);
	qemu_put_byte(f, len);
	qemu_put_buffer(f, (uint8_t *)vmsd->name, len);
	qemu_put_be32(f, vmsd->version_id);
	vmstate_save_state(f, vmsd, opaque);
	}
	sub++;
	}
	}

	/* bool */

	static int get_bool(QEMUFile f, void pv, size_t size)
	{
	bool *v = pv;
	*v = qemu_get_byte(f);
	return 0;
	}

	static void put_bool(QEMUFile f, void pv, size_t size)
	{
	bool *v = pv;
	qemu_put_byte(f, *v);
	}

	const VMStateInfo vmstate_info_bool = {
	.name = "bool",
	.get = get_bool,
	.put = put_bool,
	};

	/* 8 bit int */

	static int get_int8(QEMUFile f, void pv, size_t size)
	{
	int8_t *v = pv;
	qemu_get_s8s(f, v);
	return 0;
	}

	static void put_int8(QEMUFile f, void pv, size_t size)
	{
	int8_t *v = pv;
	qemu_put_s8s(f, v);
	}

	const VMStateInfo vmstate_info_int8 = {
	.name = "int8",
	.get = get_int8,
	.put = put_int8,
	};

	/* 16 bit int */

	static int get_int16(QEMUFile f, void pv, size_t size)
	{
	int16_t *v = pv;
	qemu_get_sbe16s(f, v);
	return 0;
	}

	static void put_int16(QEMUFile f, void pv, size_t size)
	{
	int16_t *v = pv;
	qemu_put_sbe16s(f, v);
	}

	const VMStateInfo vmstate_info_int16 = {
	.name = "int16",
	.get = get_int16,
	.put = put_int16,
	};

	/* 32 bit int */

	static int get_int32(QEMUFile f, void pv, size_t size)
	{
	int32_t *v = pv;
	qemu_get_sbe32s(f, v);
	return 0;
	}

	static void put_int32(QEMUFile f, void pv, size_t size)
	{
	int32_t *v = pv;
	qemu_put_sbe32s(f, v);
	}

	const VMStateInfo vmstate_info_int32 = {
	.name = "int32",
	.get = get_int32,
	.put = put_int32,
	};

	/* 32 bit int. See that the received value is the same than the one
	in the field */

	static int get_int32_equal(QEMUFile f, void pv, size_t size)
	{
	int32_t *v = pv;
	int32_t v2;
	qemu_get_sbe32s(f, &v2);

	if (*v == v2) {
	return 0;
	}
	return -EINVAL;
	}

	const VMStateInfo vmstate_info_int32_equal = {
	.name = "int32 equal",
	.get = get_int32_equal,
	.put = put_int32,
	};

	/* 32 bit int. Check that the received value is non-negative
	* and less than or equal to the one in the field.
	*/

	static int get_int32_le(QEMUFile f, void pv, size_t size)
	{
	int32_t *cur = pv;
	int32_t loaded;
	qemu_get_sbe32s(f, &loaded);

	if (loaded >= 0 && loaded <= *cur) {
	*cur = loaded;
	return 0;
	}
	return -EINVAL;
	}

	const VMStateInfo vmstate_info_int32_le = {
	.name = "int32 le",
	.get = get_int32_le,
	.put = put_int32,
	};

	/* 64 bit int */

	static int get_int64(QEMUFile f, void pv, size_t size)
	{
	int64_t *v = pv;
	qemu_get_sbe64s(f, v);
	return 0;
	}

	static void put_int64(QEMUFile f, void pv, size_t size)
	{
	int64_t *v = pv;
	qemu_put_sbe64s(f, v);
	}

	const VMStateInfo vmstate_info_int64 = {
	.name = "int64",
	.get = get_int64,
	.put = put_int64,
	};

	/* 8 bit unsigned int */

	static int get_uint8(QEMUFile f, void pv, size_t size)
	{
	uint8_t *v = pv;
	qemu_get_8s(f, v);
	return 0;
	}

	static void put_uint8(QEMUFile f, void pv, size_t size)
	{
	uint8_t *v = pv;
	qemu_put_8s(f, v);
	}

	const VMStateInfo vmstate_info_uint8 = {
	.name = "uint8",
	.get = get_uint8,
	.put = put_uint8,
	};

	/* 16 bit unsigned int */

	static int get_uint16(QEMUFile f, void pv, size_t size)
	{
	uint16_t *v = pv;
	qemu_get_be16s(f, v);
	return 0;
	}

	static void put_uint16(QEMUFile f, void pv, size_t size)
	{
	uint16_t *v = pv;
	qemu_put_be16s(f, v);
	}

	const VMStateInfo vmstate_info_uint16 = {
	.name = "uint16",
	.get = get_uint16,
	.put = put_uint16,
	};

	/* 32 bit unsigned int */

	static int get_uint32(QEMUFile f, void pv, size_t size)
	{
	uint32_t *v = pv;
	qemu_get_be32s(f, v);
	return 0;
	}

	static void put_uint32(QEMUFile f, void pv, size_t size)
	{
	uint32_t *v = pv;
	qemu_put_be32s(f, v);
	}

	const VMStateInfo vmstate_info_uint32 = {
	.name = "uint32",
	.get = get_uint32,
	.put = put_uint32,
	};

	/* 32 bit uint. See that the received value is the same than the one
	in the field */

	static int get_uint32_equal(QEMUFile f, void pv, size_t size)
	{
	uint32_t *v = pv;
	uint32_t v2;
	qemu_get_be32s(f, &v2);

	if (*v == v2) {
	return 0;
	}
	return -EINVAL;
	}

	const VMStateInfo vmstate_info_uint32_equal = {
	.name = "uint32 equal",
	.get = get_uint32_equal,
	.put = put_uint32,
	};

	/* 64 bit unsigned int */

	static int get_uint64(QEMUFile f, void pv, size_t size)
	{
	uint64_t *v = pv;
	qemu_get_be64s(f, v);
	return 0;
	}

	static void put_uint64(QEMUFile f, void pv, size_t size)
	{
	uint64_t *v = pv;
	qemu_put_be64s(f, v);
	}

	const VMStateInfo vmstate_info_uint64 = {
	.name = "uint64",
	.get = get_uint64,
	.put = put_uint64,
	};

	/* 64 bit unsigned int. See that the received value is the same than the one
	in the field */

	static int get_uint64_equal(QEMUFile f, void pv, size_t size)
	{
	uint64_t *v = pv;
	uint64_t v2;
	qemu_get_be64s(f, &v2);

	if (*v == v2) {
	return 0;
	}
	return -EINVAL;
	}

	const VMStateInfo vmstate_info_uint64_equal = {
	.name = "int64 equal",
	.get = get_uint64_equal,
	.put = put_uint64,
	};

	/* 8 bit int. See that the received value is the same than the one
	in the field */

	static int get_uint8_equal(QEMUFile f, void pv, size_t size)
	{
	uint8_t *v = pv;
	uint8_t v2;
	qemu_get_8s(f, &v2);

	if (*v == v2) {
	return 0;
	}
	return -EINVAL;
	}

	const VMStateInfo vmstate_info_uint8_equal = {
	.name = "uint8 equal",
	.get = get_uint8_equal,
	.put = put_uint8,
	};

	/* 16 bit unsigned int int. See that the received value is the same than the one
	in the field */

	static int get_uint16_equal(QEMUFile f, void pv, size_t size)
	{
	uint16_t *v = pv;
	uint16_t v2;
	qemu_get_be16s(f, &v2);

	if (*v == v2) {
	return 0;
	}
	return -EINVAL;
	}

	const VMStateInfo vmstate_info_uint16_equal = {
	.name = "uint16 equal",
	.get = get_uint16_equal,
	.put = put_uint16,
	};

	/* floating point */

	static int get_float64(QEMUFile f, void pv, size_t size)
	{
	float64 *v = pv;

	*v = make_float64(qemu_get_be64(f));
	return 0;
	}

	static void put_float64(QEMUFile f, void pv, size_t size)
	{
	uint64_t *v = pv;

	qemu_put_be64(f, float64_val(*v));
	}

	const VMStateInfo vmstate_info_float64 = {
	.name = "float64",
	.get = get_float64,
	.put = put_float64,
	};

	/* uint8_t buffers */

	static int get_buffer(QEMUFile f, void pv, size_t size)
	{
	uint8_t *v = pv;
	qemu_get_buffer(f, v, size);
	return 0;
	}

	static void put_buffer(QEMUFile f, void pv, size_t size)
	{
	uint8_t *v = pv;
	qemu_put_buffer(f, v, size);
	}

	const VMStateInfo vmstate_info_buffer = {
	.name = "buffer",
	.get = get_buffer,
	.put = put_buffer,
	};

	/* unused buffers: space that was used for some fields that are
	not useful anymore */

	static int get_unused_buffer(QEMUFile f, void pv, size_t size)
	{
	uint8_t buf[1024];
	int block_len;

	while (size > 0) {
	block_len = MIN(sizeof(buf), size);
	size -= block_len;
	qemu_get_buffer(f, buf, block_len);
	}
	return 0;
	}

	static void put_unused_buffer(QEMUFile f, void pv, size_t size)
	{
	static const uint8_t buf[1024];
	int block_len;

	while (size > 0) {
	block_len = MIN(sizeof(buf), size);
	size -= block_len;
	qemu_put_buffer(f, buf, block_len);
	}
	}

	const VMStateInfo vmstate_info_unused_buffer = {
	.name = "unused_buffer",
	.get = get_unused_buffer,
	.put = put_unused_buffer,
	};

	/* bitmaps (as defined by bitmap.h). Note that size here is the size
	* of the bitmap in bits. The on-the-wire format of a bitmap is 64
	* bit words with the bits in big endian order. The in-memory format
	* is an array of 'unsigned long', which may be either 32 or 64 bits.
	*/
	/* This is the number of 64 bit words sent over the wire */
	#define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64)
	static int get_bitmap(QEMUFile f, void pv, size_t size)
	{
	unsigned long *bmp = pv;
	int i, idx = 0;
	for (i = 0; i < BITS_TO_U64S(size); i++) {
	uint64_t w = qemu_get_be64(f);
	bmp[idx++] = w;
	if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) {
	bmp[idx++] = w >> 32;
	}
	}
	return 0;
	}

	static void put_bitmap(QEMUFile f, void pv, size_t size)
	{
	unsigned long *bmp = pv;
	int i, idx = 0;
	for (i = 0; i < BITS_TO_U64S(size); i++) {
	uint64_t w = bmp[idx++];
	if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) {
	w \|= ((uint64_t)bmp[idx++]) << 32;
	}
	qemu_put_be64(f, w);
	}
	}

	const VMStateInfo vmstate_info_bitmap = {
	.name = "bitmap",
	.get = get_bitmap,
	.put = put_bitmap,
	};