/* * QEMU migration/snapshot declarations * * Copyright (c) 2009-2011 Red Hat, Inc. * * Original author: Juan Quintela * * 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. */ #ifndef QEMU_VMSTATE_H #define QEMU_VMSTATE_H #include "migration/qjson.h" typedef void SaveStateHandler(QEMUFile *f, void *opaque); typedef int LoadStateHandler(QEMUFile *f, void *opaque, int version_id); typedef struct SaveVMHandlers { /* This runs inside the iothread lock. */ SaveStateHandler *save_state; void (*cleanup)(void *opaque); int (*save_live_complete_postcopy)(QEMUFile *f, void *opaque); int (*save_live_complete_precopy)(QEMUFile *f, void *opaque); /* This runs both outside and inside the iothread lock. */ bool (*is_active)(void *opaque); /* This runs outside the iothread lock in the migration case, and * within the lock in the savevm case. The callback had better only * use data that is local to the migration thread or protected * by other locks. */ int (*save_live_iterate)(QEMUFile *f, void *opaque); /* This runs outside the iothread lock! */ int (*save_live_setup)(QEMUFile *f, void *opaque); void (*save_live_pending)(QEMUFile *f, void *opaque, uint64_t threshold_size, uint64_t *non_postcopiable_pending, uint64_t *postcopiable_pending); LoadStateHandler *load_state; } SaveVMHandlers; int register_savevm(DeviceState *dev, const char *idstr, int instance_id, int version_id, SaveStateHandler *save_state, LoadStateHandler *load_state, void *opaque); int register_savevm_live(DeviceState *dev, const char *idstr, int instance_id, int version_id, SaveVMHandlers *ops, void *opaque); void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque); typedef struct VMStateInfo VMStateInfo; typedef struct VMStateDescription VMStateDescription; typedef struct VMStateField VMStateField; /* VMStateInfo allows customized migration of objects that don't fit in * any category in VMStateFlags. Additional information is always passed * into get and put in terms of field and vmdesc parameters. However * these two parameters should only be used in cases when customized * handling is needed, such as QTAILQ. For primitive data types such as * integer, field and vmdesc parameters should be ignored inside get/put. */ struct VMStateInfo { const char *name; int (*get)(QEMUFile *f, void *pv, size_t size, VMStateField *field); int (*put)(QEMUFile *f, void *pv, size_t size, VMStateField *field, QJSON *vmdesc); }; enum VMStateFlags { /* Ignored */ VMS_SINGLE = 0x001, /* The struct member at opaque + VMStateField.offset is a pointer * to the actual field (e.g. struct a { uint8_t *b; * }). Dereference the pointer before using it as basis for * further pointer arithmetic (see e.g. VMS_ARRAY). Does not * affect the meaning of VMStateField.num_offset or * VMStateField.size_offset; see VMS_VARRAY* and VMS_VBUFFER for * those. */ VMS_POINTER = 0x002, /* The field is an array of fixed size. VMStateField.num contains * the number of entries in the array. The size of each entry is * given by VMStateField.size and / or opaque + * VMStateField.size_offset; see VMS_VBUFFER and * VMS_MULTIPLY. Each array entry will be processed individually * (VMStateField.info.get()/put() if VMS_STRUCT is not set, * recursion into VMStateField.vmsd if VMS_STRUCT is set). May not * be combined with VMS_VARRAY*. */ VMS_ARRAY = 0x004, /* The field is itself a struct, containing one or more * fields. Recurse into VMStateField.vmsd. Most useful in * combination with VMS_ARRAY / VMS_VARRAY*, recursing into each * array entry. */ VMS_STRUCT = 0x008, /* The field is an array of variable size. The int32_t at opaque + * VMStateField.num_offset contains the number of entries in the * array. See the VMS_ARRAY description regarding array handling * in general. May not be combined with VMS_ARRAY or any other * VMS_VARRAY*. */ VMS_VARRAY_INT32 = 0x010, /* Ignored */ VMS_BUFFER = 0x020, /* The field is a (fixed-size or variable-size) array of pointers * (e.g. struct a { uint8_t *b[]; }). Dereference each array entry * before using it. Note: Does not imply any one of VMS_ARRAY / * VMS_VARRAY*; these need to be set explicitly. */ VMS_ARRAY_OF_POINTER = 0x040, /* The field is an array of variable size. The uint16_t at opaque * + VMStateField.num_offset (subject to VMS_MULTIPLY_ELEMENTS) * contains the number of entries in the array. See the VMS_ARRAY * description regarding array handling in general. May not be * combined with VMS_ARRAY or any other VMS_VARRAY*. */ VMS_VARRAY_UINT16 = 0x080, /* The size of the individual entries (a single array entry if * VMS_ARRAY or any of VMS_VARRAY* are set, or the field itself if * neither is set) is variable (i.e. not known at compile-time), * but the same for all entries. Use the int32_t at opaque + * VMStateField.size_offset (subject to VMS_MULTIPLY) to determine * the size of each (and every) entry. */ VMS_VBUFFER = 0x100, /* Multiply the entry size given by the int32_t at opaque + * VMStateField.size_offset (see VMS_VBUFFER description) with * VMStateField.size to determine the number of bytes to be * allocated. Only valid in combination with VMS_VBUFFER. */ VMS_MULTIPLY = 0x200, /* The field is an array of variable size. The uint8_t at opaque + * VMStateField.num_offset (subject to VMS_MULTIPLY_ELEMENTS) * contains the number of entries in the array. See the VMS_ARRAY * description regarding array handling in general. May not be * combined with VMS_ARRAY or any other VMS_VARRAY*. */ VMS_VARRAY_UINT8 = 0x400, /* The field is an array of variable size. The uint32_t at opaque * + VMStateField.num_offset (subject to VMS_MULTIPLY_ELEMENTS) * contains the number of entries in the array. See the VMS_ARRAY * description regarding array handling in general. May not be * combined with VMS_ARRAY or any other VMS_VARRAY*. */ VMS_VARRAY_UINT32 = 0x800, /* Fail loading the serialised VM state if this field is missing * from the input. */ VMS_MUST_EXIST = 0x1000, /* When loading serialised VM state, allocate memory for the * (entire) field. Only valid in combination with * VMS_POINTER. Note: Not all combinations with other flags are * currently supported, e.g. VMS_ALLOC|VMS_ARRAY_OF_POINTER won't * cause the individual entries to be allocated. */ VMS_ALLOC = 0x2000, /* Multiply the number of entries given by the integer at opaque + * VMStateField.num_offset (see VMS_VARRAY*) with VMStateField.num * to determine the number of entries in the array. Only valid in * combination with one of VMS_VARRAY*. */ VMS_MULTIPLY_ELEMENTS = 0x4000, }; typedef enum { MIG_PRI_DEFAULT = 0, MIG_PRI_IOMMU, /* Must happen before PCI devices */ MIG_PRI_MAX, } MigrationPriority; struct VMStateField { const char *name; size_t offset; size_t size; size_t start; int num; size_t num_offset; size_t size_offset; const VMStateInfo *info; enum VMStateFlags flags; const VMStateDescription *vmsd; int version_id; bool (*field_exists)(void *opaque, int version_id); }; struct VMStateDescription { const char *name; int unmigratable; int version_id; int minimum_version_id; int minimum_version_id_old; MigrationPriority priority; LoadStateHandler *load_state_old; int (*pre_load)(void *opaque); int (*post_load)(void *opaque, int version_id); void (*pre_save)(void *opaque); bool (*needed)(void *opaque); VMStateField *fields; const VMStateDescription **subsections; }; extern const VMStateDescription vmstate_dummy; extern const VMStateInfo vmstate_info_bool; extern const VMStateInfo vmstate_info_int8; extern const VMStateInfo vmstate_info_int16; extern const VMStateInfo vmstate_info_int32; extern const VMStateInfo vmstate_info_int64; extern const VMStateInfo vmstate_info_uint8_equal; extern const VMStateInfo vmstate_info_uint16_equal; extern const VMStateInfo vmstate_info_int32_equal; extern const VMStateInfo vmstate_info_uint32_equal; extern const VMStateInfo vmstate_info_uint64_equal; extern const VMStateInfo vmstate_info_int32_le; extern const VMStateInfo vmstate_info_uint8; extern const VMStateInfo vmstate_info_uint16; extern const VMStateInfo vmstate_info_uint32; extern const VMStateInfo vmstate_info_uint64; /** Put this in the stream when migrating a null pointer.*/ #define VMS_NULLPTR_MARKER (0x30U) /* '0' */ extern const VMStateInfo vmstate_info_nullptr; extern const VMStateInfo vmstate_info_float64; extern const VMStateInfo vmstate_info_cpudouble; extern const VMStateInfo vmstate_info_timer; extern const VMStateInfo vmstate_info_buffer; extern const VMStateInfo vmstate_info_unused_buffer; extern const VMStateInfo vmstate_info_tmp; extern const VMStateInfo vmstate_info_bitmap; extern const VMStateInfo vmstate_info_qtailq; #define type_check_2darray(t1,t2,n,m) ((t1(*)[n][m])0 - (t2*)0) #define type_check_array(t1,t2,n) ((t1(*)[n])0 - (t2*)0) #define type_check_pointer(t1,t2) ((t1**)0 - (t2*)0) #define vmstate_offset_value(_state, _field, _type) \ (offsetof(_state, _field) + \ type_check(_type, typeof_field(_state, _field))) #define vmstate_offset_pointer(_state, _field, _type) \ (offsetof(_state, _field) + \ type_check_pointer(_type, typeof_field(_state, _field))) #define vmstate_offset_array(_state, _field, _type, _num) \ (offsetof(_state, _field) + \ type_check_array(_type, typeof_field(_state, _field), _num)) #define vmstate_offset_2darray(_state, _field, _type, _n1, _n2) \ (offsetof(_state, _field) + \ type_check_2darray(_type, typeof_field(_state, _field), _n1, _n2)) #define vmstate_offset_sub_array(_state, _field, _type, _start) \ vmstate_offset_value(_state, _field[_start], _type) #define vmstate_offset_buffer(_state, _field) \ vmstate_offset_array(_state, _field, uint8_t, \ sizeof(typeof_field(_state, _field))) #define VMSTATE_SINGLE_TEST(_field, _state, _test, _version, _info, _type) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .field_exists = (_test), \ .size = sizeof(_type), \ .info = &(_info), \ .flags = VMS_SINGLE, \ .offset = vmstate_offset_value(_state, _field, _type), \ } /* Validate state using a boolean predicate. */ #define VMSTATE_VALIDATE(_name, _test) { \ .name = (_name), \ .field_exists = (_test), \ .flags = VMS_ARRAY | VMS_MUST_EXIST, \ .num = 0, /* 0 elements: no data, only run _test */ \ } #define VMSTATE_POINTER(_field, _state, _version, _info, _type) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .info = &(_info), \ .size = sizeof(_type), \ .flags = VMS_SINGLE|VMS_POINTER, \ .offset = vmstate_offset_value(_state, _field, _type), \ } #define VMSTATE_POINTER_TEST(_field, _state, _test, _info, _type) { \ .name = (stringify(_field)), \ .info = &(_info), \ .field_exists = (_test), \ .size = sizeof(_type), \ .flags = VMS_SINGLE|VMS_POINTER, \ .offset = vmstate_offset_value(_state, _field, _type), \ } #define VMSTATE_ARRAY(_field, _state, _num, _version, _info, _type) {\ .name = (stringify(_field)), \ .version_id = (_version), \ .num = (_num), \ .info = &(_info), \ .size = sizeof(_type), \ .flags = VMS_ARRAY, \ .offset = vmstate_offset_array(_state, _field, _type, _num), \ } #define VMSTATE_2DARRAY(_field, _state, _n1, _n2, _version, _info, _type) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .num = (_n1) * (_n2), \ .info = &(_info), \ .size = sizeof(_type), \ .flags = VMS_ARRAY, \ .offset = vmstate_offset_2darray(_state, _field, _type, _n1, _n2), \ } #define VMSTATE_VARRAY_MULTIPLY(_field, _state, _field_num, _multiply, _info, _type) { \ .name = (stringify(_field)), \ .num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\ .num = (_multiply), \ .info = &(_info), \ .size = sizeof(_type), \ .flags = VMS_VARRAY_UINT32|VMS_MULTIPLY_ELEMENTS, \ .offset = offsetof(_state, _field), \ } #define VMSTATE_ARRAY_TEST(_field, _state, _num, _test, _info, _type) {\ .name = (stringify(_field)), \ .field_exists = (_test), \ .num = (_num), \ .info = &(_info), \ .size = sizeof(_type), \ .flags = VMS_ARRAY, \ .offset = vmstate_offset_array(_state, _field, _type, _num),\ } #define VMSTATE_SUB_ARRAY(_field, _state, _start, _num, _version, _info, _type) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .num = (_num), \ .info = &(_info), \ .size = sizeof(_type), \ .flags = VMS_ARRAY, \ .offset = vmstate_offset_sub_array(_state, _field, _type, _start), \ } #define VMSTATE_ARRAY_INT32_UNSAFE(_field, _state, _field_num, _info, _type) {\ .name = (stringify(_field)), \ .num_offset = vmstate_offset_value(_state, _field_num, int32_t), \ .info = &(_info), \ .size = sizeof(_type), \ .flags = VMS_VARRAY_INT32, \ .offset = offsetof(_state, _field), \ } #define VMSTATE_VARRAY_INT32(_field, _state, _field_num, _version, _info, _type) {\ .name = (stringify(_field)), \ .version_id = (_version), \ .num_offset = vmstate_offset_value(_state, _field_num, int32_t), \ .info = &(_info), \ .size = sizeof(_type), \ .flags = VMS_VARRAY_INT32|VMS_POINTER, \ .offset = vmstate_offset_pointer(_state, _field, _type), \ } #define VMSTATE_VARRAY_UINT32(_field, _state, _field_num, _version, _info, _type) {\ .name = (stringify(_field)), \ .version_id = (_version), \ .num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\ .info = &(_info), \ .size = sizeof(_type), \ .flags = VMS_VARRAY_UINT32|VMS_POINTER, \ .offset = vmstate_offset_pointer(_state, _field, _type), \ } #define VMSTATE_VARRAY_UINT32_ALLOC(_field, _state, _field_num, _version, _info, _type) {\ .name = (stringify(_field)), \ .version_id = (_version), \ .num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\ .info = &(_info), \ .size = sizeof(_type), \ .flags = VMS_VARRAY_UINT32|VMS_POINTER|VMS_ALLOC, \ .offset = vmstate_offset_pointer(_state, _field, _type), \ } #define VMSTATE_VARRAY_UINT16_UNSAFE(_field, _state, _field_num, _version, _info, _type) {\ .name = (stringify(_field)), \ .version_id = (_version), \ .num_offset = vmstate_offset_value(_state, _field_num, uint16_t),\ .info = &(_info), \ .size = sizeof(_type), \ .flags = VMS_VARRAY_UINT16, \ .offset = offsetof(_state, _field), \ } #define VMSTATE_STRUCT_TEST(_field, _state, _test, _version, _vmsd, _type) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .field_exists = (_test), \ .vmsd = &(_vmsd), \ .size = sizeof(_type), \ .flags = VMS_STRUCT, \ .offset = vmstate_offset_value(_state, _field, _type), \ } #define VMSTATE_STRUCT_POINTER_V(_field, _state, _version, _vmsd, _type) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .vmsd = &(_vmsd), \ .size = sizeof(_type *), \ .flags = VMS_STRUCT|VMS_POINTER, \ .offset = vmstate_offset_pointer(_state, _field, _type), \ } #define VMSTATE_STRUCT_POINTER_TEST_V(_field, _state, _test, _version, _vmsd, _type) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .field_exists = (_test), \ .vmsd = &(_vmsd), \ .size = sizeof(_type *), \ .flags = VMS_STRUCT|VMS_POINTER, \ .offset = vmstate_offset_pointer(_state, _field, _type), \ } #define VMSTATE_ARRAY_OF_POINTER(_field, _state, _num, _version, _info, _type) {\ .name = (stringify(_field)), \ .version_id = (_version), \ .num = (_num), \ .info = &(_info), \ .size = sizeof(_type), \ .flags = VMS_ARRAY|VMS_ARRAY_OF_POINTER, \ .offset = vmstate_offset_array(_state, _field, _type, _num), \ } #define VMSTATE_ARRAY_OF_POINTER_TO_STRUCT(_f, _s, _n, _v, _vmsd, _type) { \ .name = (stringify(_f)), \ .version_id = (_v), \ .num = (_n), \ .vmsd = &(_vmsd), \ .size = sizeof(_type *), \ .flags = VMS_ARRAY|VMS_STRUCT|VMS_ARRAY_OF_POINTER, \ .offset = vmstate_offset_array(_s, _f, _type*, _n), \ } #define VMSTATE_STRUCT_SUB_ARRAY(_field, _state, _start, _num, _version, _vmsd, _type) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .num = (_num), \ .vmsd = &(_vmsd), \ .size = sizeof(_type), \ .flags = VMS_STRUCT|VMS_ARRAY, \ .offset = vmstate_offset_sub_array(_state, _field, _type, _start), \ } #define VMSTATE_STRUCT_ARRAY_TEST(_field, _state, _num, _test, _version, _vmsd, _type) { \ .name = (stringify(_field)), \ .num = (_num), \ .field_exists = (_test), \ .version_id = (_version), \ .vmsd = &(_vmsd), \ .size = sizeof(_type), \ .flags = VMS_STRUCT|VMS_ARRAY, \ .offset = vmstate_offset_array(_state, _field, _type, _num),\ } #define VMSTATE_STRUCT_2DARRAY_TEST(_field, _state, _n1, _n2, _test, \ _version, _vmsd, _type) { \ .name = (stringify(_field)), \ .num = (_n1) * (_n2), \ .field_exists = (_test), \ .version_id = (_version), \ .vmsd = &(_vmsd), \ .size = sizeof(_type), \ .flags = VMS_STRUCT | VMS_ARRAY, \ .offset = vmstate_offset_2darray(_state, _field, _type, \ _n1, _n2), \ } #define VMSTATE_STRUCT_VARRAY_UINT8(_field, _state, _field_num, _version, _vmsd, _type) { \ .name = (stringify(_field)), \ .num_offset = vmstate_offset_value(_state, _field_num, uint8_t), \ .version_id = (_version), \ .vmsd = &(_vmsd), \ .size = sizeof(_type), \ .flags = VMS_STRUCT|VMS_VARRAY_UINT8, \ .offset = offsetof(_state, _field), \ } /* a variable length array (i.e. _type *_field) but we know the * length */ #define VMSTATE_STRUCT_VARRAY_POINTER_KNOWN(_field, _state, _num, _version, _vmsd, _type) { \ .name = (stringify(_field)), \ .num = (_num), \ .version_id = (_version), \ .vmsd = &(_vmsd), \ .size = sizeof(_type), \ .flags = VMS_STRUCT|VMS_ARRAY|VMS_POINTER, \ .offset = offsetof(_state, _field), \ } #define VMSTATE_STRUCT_VARRAY_POINTER_INT32(_field, _state, _field_num, _vmsd, _type) { \ .name = (stringify(_field)), \ .version_id = 0, \ .num_offset = vmstate_offset_value(_state, _field_num, int32_t), \ .size = sizeof(_type), \ .vmsd = &(_vmsd), \ .flags = VMS_POINTER | VMS_VARRAY_INT32 | VMS_STRUCT, \ .offset = vmstate_offset_pointer(_state, _field, _type), \ } #define VMSTATE_STRUCT_VARRAY_POINTER_UINT32(_field, _state, _field_num, _vmsd, _type) { \ .name = (stringify(_field)), \ .version_id = 0, \ .num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\ .size = sizeof(_type), \ .vmsd = &(_vmsd), \ .flags = VMS_POINTER | VMS_VARRAY_INT32 | VMS_STRUCT, \ .offset = vmstate_offset_pointer(_state, _field, _type), \ } #define VMSTATE_STRUCT_VARRAY_POINTER_UINT16(_field, _state, _field_num, _vmsd, _type) { \ .name = (stringify(_field)), \ .version_id = 0, \ .num_offset = vmstate_offset_value(_state, _field_num, uint16_t),\ .size = sizeof(_type), \ .vmsd = &(_vmsd), \ .flags = VMS_POINTER | VMS_VARRAY_UINT16 | VMS_STRUCT, \ .offset = vmstate_offset_pointer(_state, _field, _type), \ } #define VMSTATE_STRUCT_VARRAY_INT32(_field, _state, _field_num, _version, _vmsd, _type) { \ .name = (stringify(_field)), \ .num_offset = vmstate_offset_value(_state, _field_num, int32_t), \ .version_id = (_version), \ .vmsd = &(_vmsd), \ .size = sizeof(_type), \ .flags = VMS_STRUCT|VMS_VARRAY_INT32, \ .offset = offsetof(_state, _field), \ } #define VMSTATE_STRUCT_VARRAY_UINT32(_field, _state, _field_num, _version, _vmsd, _type) { \ .name = (stringify(_field)), \ .num_offset = vmstate_offset_value(_state, _field_num, uint32_t), \ .version_id = (_version), \ .vmsd = &(_vmsd), \ .size = sizeof(_type), \ .flags = VMS_STRUCT|VMS_VARRAY_UINT32, \ .offset = offsetof(_state, _field), \ } #define VMSTATE_STRUCT_VARRAY_ALLOC(_field, _state, _field_num, _version, _vmsd, _type) {\ .name = (stringify(_field)), \ .version_id = (_version), \ .vmsd = &(_vmsd), \ .num_offset = vmstate_offset_value(_state, _field_num, int32_t), \ .size = sizeof(_type), \ .flags = VMS_STRUCT|VMS_VARRAY_INT32|VMS_ALLOC|VMS_POINTER, \ .offset = vmstate_offset_pointer(_state, _field, _type), \ } #define VMSTATE_STATIC_BUFFER(_field, _state, _version, _test, _start, _size) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .field_exists = (_test), \ .size = (_size - _start), \ .info = &vmstate_info_buffer, \ .flags = VMS_BUFFER, \ .offset = vmstate_offset_buffer(_state, _field) + _start, \ } #define VMSTATE_VBUFFER_MULTIPLY(_field, _state, _version, _test, \ _field_size, _multiply) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .field_exists = (_test), \ .size_offset = vmstate_offset_value(_state, _field_size, uint32_t),\ .size = (_multiply), \ .info = &vmstate_info_buffer, \ .flags = VMS_VBUFFER|VMS_POINTER|VMS_MULTIPLY, \ .offset = offsetof(_state, _field), \ } #define VMSTATE_VBUFFER(_field, _state, _version, _test, _field_size) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .field_exists = (_test), \ .size_offset = vmstate_offset_value(_state, _field_size, int32_t),\ .info = &vmstate_info_buffer, \ .flags = VMS_VBUFFER|VMS_POINTER, \ .offset = offsetof(_state, _field), \ } #define VMSTATE_VBUFFER_UINT32(_field, _state, _version, _test, _field_size) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .field_exists = (_test), \ .size_offset = vmstate_offset_value(_state, _field_size, uint32_t),\ .info = &vmstate_info_buffer, \ .flags = VMS_VBUFFER|VMS_POINTER, \ .offset = offsetof(_state, _field), \ } #define VMSTATE_VBUFFER_ALLOC_UINT32(_field, _state, _version, \ _test, _field_size) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .field_exists = (_test), \ .size_offset = vmstate_offset_value(_state, _field_size, uint32_t),\ .info = &vmstate_info_buffer, \ .flags = VMS_VBUFFER|VMS_POINTER|VMS_ALLOC, \ .offset = offsetof(_state, _field), \ } #define VMSTATE_BUFFER_UNSAFE_INFO_TEST(_field, _state, _test, _version, _info, _size) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .field_exists = (_test), \ .size = (_size), \ .info = &(_info), \ .flags = VMS_BUFFER, \ .offset = offsetof(_state, _field), \ } #define VMSTATE_BUFFER_POINTER_UNSAFE(_field, _state, _version, _size) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .size = (_size), \ .info = &vmstate_info_buffer, \ .flags = VMS_BUFFER|VMS_POINTER, \ .offset = offsetof(_state, _field), \ } /* Allocate a temporary of type 'tmp_type', set tmp->parent to _state * and execute the vmsd on the temporary. Note that we're working with * the whole of _state here, not a field within it. * We compile time check that: * That _tmp_type contains a 'parent' member that's a pointer to the * '_state' type * That the pointer is right at the start of _tmp_type. */ #define VMSTATE_WITH_TMP(_state, _tmp_type, _vmsd) { \ .name = "tmp", \ .size = sizeof(_tmp_type) + \ QEMU_BUILD_BUG_ON_ZERO(offsetof(_tmp_type, parent) != 0) + \ type_check_pointer(_state, \ typeof_field(_tmp_type, parent)), \ .vmsd = &(_vmsd), \ .info = &vmstate_info_tmp, \ } #define VMSTATE_UNUSED_BUFFER(_test, _version, _size) { \ .name = "unused", \ .field_exists = (_test), \ .version_id = (_version), \ .size = (_size), \ .info = &vmstate_info_unused_buffer, \ .flags = VMS_BUFFER, \ } /* Discard size * field_num bytes, where field_num is a uint32 member */ #define VMSTATE_UNUSED_VARRAY_UINT32(_state, _test, _version, _field_num, _size) {\ .name = "unused", \ .field_exists = (_test), \ .num_offset = vmstate_offset_value(_state, _field_num, uint32_t),\ .version_id = (_version), \ .size = (_size), \ .info = &vmstate_info_unused_buffer, \ .flags = VMS_VARRAY_UINT32 | VMS_BUFFER, \ } /* _field_size should be a int32_t field in the _state struct giving the * size of the bitmap _field in bits. */ #define VMSTATE_BITMAP(_field, _state, _version, _field_size) { \ .name = (stringify(_field)), \ .version_id = (_version), \ .size_offset = vmstate_offset_value(_state, _field_size, int32_t),\ .info = &vmstate_info_bitmap, \ .flags = VMS_VBUFFER|VMS_POINTER, \ .offset = offsetof(_state, _field), \ } /* For migrating a QTAILQ. * Target QTAILQ needs be properly initialized. * _type: type of QTAILQ element * _next: name of QTAILQ entry field in QTAILQ element * _vmsd: VMSD for QTAILQ element * size: size of QTAILQ element * start: offset of QTAILQ entry in QTAILQ element */ #define VMSTATE_QTAILQ_V(_field, _state, _version, _vmsd, _type, _next) \ { \ .name = (stringify(_field)), \ .version_id = (_version), \ .vmsd = &(_vmsd), \ .size = sizeof(_type), \ .info = &vmstate_info_qtailq, \ .offset = offsetof(_state, _field), \ .start = offsetof(_type, _next), \ } /* _f : field name _f_n : num of elements field_name _n : num of elements _s : struct state name _v : version */ #define VMSTATE_SINGLE(_field, _state, _version, _info, _type) \ VMSTATE_SINGLE_TEST(_field, _state, NULL, _version, _info, _type) #define VMSTATE_STRUCT(_field, _state, _version, _vmsd, _type) \ VMSTATE_STRUCT_TEST(_field, _state, NULL, _version, _vmsd, _type) #define VMSTATE_STRUCT_POINTER(_field, _state, _vmsd, _type) \ VMSTATE_STRUCT_POINTER_V(_field, _state, 0, _vmsd, _type) #define VMSTATE_STRUCT_POINTER_TEST(_field, _state, _test, _vmsd, _type) \ VMSTATE_STRUCT_POINTER_TEST_V(_field, _state, _test, 0, _vmsd, _type) #define VMSTATE_STRUCT_ARRAY(_field, _state, _num, _version, _vmsd, _type) \ VMSTATE_STRUCT_ARRAY_TEST(_field, _state, _num, NULL, _version, \ _vmsd, _type) #define VMSTATE_STRUCT_2DARRAY(_field, _state, _n1, _n2, _version, \ _vmsd, _type) \ VMSTATE_STRUCT_2DARRAY_TEST(_field, _state, _n1, _n2, NULL, \ _version, _vmsd, _type) #define VMSTATE_BUFFER_UNSAFE_INFO(_field, _state, _version, _info, _size) \ VMSTATE_BUFFER_UNSAFE_INFO_TEST(_field, _state, NULL, _version, _info, \ _size) #define VMSTATE_BOOL_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_bool, bool) #define VMSTATE_INT8_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_int8, int8_t) #define VMSTATE_INT16_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_int16, int16_t) #define VMSTATE_INT32_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_int32, int32_t) #define VMSTATE_INT64_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_int64, int64_t) #define VMSTATE_UINT8_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint8, uint8_t) #define VMSTATE_UINT16_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint16, uint16_t) #define VMSTATE_UINT32_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint32, uint32_t) #define VMSTATE_UINT64_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint64, uint64_t) #define VMSTATE_BOOL(_f, _s) \ VMSTATE_BOOL_V(_f, _s, 0) #define VMSTATE_INT8(_f, _s) \ VMSTATE_INT8_V(_f, _s, 0) #define VMSTATE_INT16(_f, _s) \ VMSTATE_INT16_V(_f, _s, 0) #define VMSTATE_INT32(_f, _s) \ VMSTATE_INT32_V(_f, _s, 0) #define VMSTATE_INT64(_f, _s) \ VMSTATE_INT64_V(_f, _s, 0) #define VMSTATE_UINT8(_f, _s) \ VMSTATE_UINT8_V(_f, _s, 0) #define VMSTATE_UINT16(_f, _s) \ VMSTATE_UINT16_V(_f, _s, 0) #define VMSTATE_UINT32(_f, _s) \ VMSTATE_UINT32_V(_f, _s, 0) #define VMSTATE_UINT64(_f, _s) \ VMSTATE_UINT64_V(_f, _s, 0) #define VMSTATE_UINT8_EQUAL(_f, _s) \ VMSTATE_SINGLE(_f, _s, 0, vmstate_info_uint8_equal, uint8_t) #define VMSTATE_UINT16_EQUAL(_f, _s) \ VMSTATE_SINGLE(_f, _s, 0, vmstate_info_uint16_equal, uint16_t) #define VMSTATE_UINT16_EQUAL_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint16_equal, uint16_t) #define VMSTATE_INT32_EQUAL(_f, _s) \ VMSTATE_SINGLE(_f, _s, 0, vmstate_info_int32_equal, int32_t) #define VMSTATE_UINT32_EQUAL_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint32_equal, uint32_t) #define VMSTATE_UINT32_EQUAL(_f, _s) \ VMSTATE_UINT32_EQUAL_V(_f, _s, 0) #define VMSTATE_UINT64_EQUAL_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_uint64_equal, uint64_t) #define VMSTATE_UINT64_EQUAL(_f, _s) \ VMSTATE_UINT64_EQUAL_V(_f, _s, 0) #define VMSTATE_INT32_POSITIVE_LE(_f, _s) \ VMSTATE_SINGLE(_f, _s, 0, vmstate_info_int32_le, int32_t) #define VMSTATE_INT8_TEST(_f, _s, _t) \ VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_int8, int8_t) #define VMSTATE_INT16_TEST(_f, _s, _t) \ VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_int16, int16_t) #define VMSTATE_INT32_TEST(_f, _s, _t) \ VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_int32, int32_t) #define VMSTATE_INT64_TEST(_f, _s, _t) \ VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_int64, int64_t) #define VMSTATE_UINT8_TEST(_f, _s, _t) \ VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_uint8, uint8_t) #define VMSTATE_UINT16_TEST(_f, _s, _t) \ VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_uint16, uint16_t) #define VMSTATE_UINT32_TEST(_f, _s, _t) \ VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_uint32, uint32_t) #define VMSTATE_UINT64_TEST(_f, _s, _t) \ VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_uint64, uint64_t) #define VMSTATE_FLOAT64_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_float64, float64) #define VMSTATE_FLOAT64(_f, _s) \ VMSTATE_FLOAT64_V(_f, _s, 0) #define VMSTATE_TIMER_PTR_TEST(_f, _s, _test) \ VMSTATE_POINTER_TEST(_f, _s, _test, vmstate_info_timer, QEMUTimer *) #define VMSTATE_TIMER_PTR_V(_f, _s, _v) \ VMSTATE_POINTER(_f, _s, _v, vmstate_info_timer, QEMUTimer *) #define VMSTATE_TIMER_PTR(_f, _s) \ VMSTATE_TIMER_PTR_V(_f, _s, 0) #define VMSTATE_TIMER_PTR_ARRAY(_f, _s, _n) \ VMSTATE_ARRAY_OF_POINTER(_f, _s, _n, 0, vmstate_info_timer, QEMUTimer *) #define VMSTATE_TIMER_TEST(_f, _s, _test) \ VMSTATE_SINGLE_TEST(_f, _s, _test, 0, vmstate_info_timer, QEMUTimer) #define VMSTATE_TIMER_V(_f, _s, _v) \ VMSTATE_SINGLE(_f, _s, _v, vmstate_info_timer, QEMUTimer) #define VMSTATE_TIMER(_f, _s) \ VMSTATE_TIMER_V(_f, _s, 0) #define VMSTATE_TIMER_ARRAY(_f, _s, _n) \ VMSTATE_ARRAY(_f, _s, _n, 0, vmstate_info_timer, QEMUTimer) #define VMSTATE_BOOL_ARRAY_V(_f, _s, _n, _v) \ VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_bool, bool) #define VMSTATE_BOOL_ARRAY(_f, _s, _n) \ VMSTATE_BOOL_ARRAY_V(_f, _s, _n, 0) #define VMSTATE_UINT16_ARRAY_V(_f, _s, _n, _v) \ VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_uint16, uint16_t) #define VMSTATE_UINT16_2DARRAY_V(_f, _s, _n1, _n2, _v) \ VMSTATE_2DARRAY(_f, _s, _n1, _n2, _v, vmstate_info_uint16, uint16_t) #define VMSTATE_UINT16_ARRAY(_f, _s, _n) \ VMSTATE_UINT16_ARRAY_V(_f, _s, _n, 0) #define VMSTATE_UINT16_2DARRAY(_f, _s, _n1, _n2) \ VMSTATE_UINT16_2DARRAY_V(_f, _s, _n1, _n2, 0) #define VMSTATE_UINT8_2DARRAY_V(_f, _s, _n1, _n2, _v) \ VMSTATE_2DARRAY(_f, _s, _n1, _n2, _v, vmstate_info_uint8, uint8_t) #define VMSTATE_UINT8_ARRAY_V(_f, _s, _n, _v) \ VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_uint8, uint8_t) #define VMSTATE_UINT8_ARRAY(_f, _s, _n) \ VMSTATE_UINT8_ARRAY_V(_f, _s, _n, 0) #define VMSTATE_UINT8_SUB_ARRAY(_f, _s, _start, _num) \ VMSTATE_SUB_ARRAY(_f, _s, _start, _num, 0, vmstate_info_uint8, uint8_t) #define VMSTATE_UINT8_2DARRAY(_f, _s, _n1, _n2) \ VMSTATE_UINT8_2DARRAY_V(_f, _s, _n1, _n2, 0) #define VMSTATE_UINT32_ARRAY_V(_f, _s, _n, _v) \ VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_uint32, uint32_t) #define VMSTATE_UINT32_2DARRAY_V(_f, _s, _n1, _n2, _v) \ VMSTATE_2DARRAY(_f, _s, _n1, _n2, _v, vmstate_info_uint32, uint32_t) #define VMSTATE_UINT32_ARRAY(_f, _s, _n) \ VMSTATE_UINT32_ARRAY_V(_f, _s, _n, 0) #define VMSTATE_UINT32_2DARRAY(_f, _s, _n1, _n2) \ VMSTATE_UINT32_2DARRAY_V(_f, _s, _n1, _n2, 0) #define VMSTATE_UINT64_ARRAY_V(_f, _s, _n, _v) \ VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_uint64, uint64_t) #define VMSTATE_UINT64_ARRAY(_f, _s, _n) \ VMSTATE_UINT64_ARRAY_V(_f, _s, _n, 0) #define VMSTATE_UINT64_2DARRAY(_f, _s, _n1, _n2) \ VMSTATE_UINT64_2DARRAY_V(_f, _s, _n1, _n2, 0) #define VMSTATE_UINT64_2DARRAY_V(_f, _s, _n1, _n2, _v) \ VMSTATE_2DARRAY(_f, _s, _n1, _n2, _v, vmstate_info_uint64, uint64_t) #define VMSTATE_INT16_ARRAY_V(_f, _s, _n, _v) \ VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_int16, int16_t) #define VMSTATE_INT16_ARRAY(_f, _s, _n) \ VMSTATE_INT16_ARRAY_V(_f, _s, _n, 0) #define VMSTATE_INT32_ARRAY_V(_f, _s, _n, _v) \ VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_int32, int32_t) #define VMSTATE_INT32_ARRAY(_f, _s, _n) \ VMSTATE_INT32_ARRAY_V(_f, _s, _n, 0) #define VMSTATE_UINT32_SUB_ARRAY(_f, _s, _start, _num) \ VMSTATE_SUB_ARRAY(_f, _s, _start, _num, 0, vmstate_info_uint32, uint32_t) #define VMSTATE_INT64_ARRAY_V(_f, _s, _n, _v) \ VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_int64, int64_t) #define VMSTATE_INT64_ARRAY(_f, _s, _n) \ VMSTATE_INT64_ARRAY_V(_f, _s, _n, 0) #define VMSTATE_FLOAT64_ARRAY_V(_f, _s, _n, _v) \ VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_float64, float64) #define VMSTATE_FLOAT64_ARRAY(_f, _s, _n) \ VMSTATE_FLOAT64_ARRAY_V(_f, _s, _n, 0) #define VMSTATE_CPUDOUBLE_ARRAY_V(_f, _s, _n, _v) \ VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_cpudouble, CPU_DoubleU) #define VMSTATE_CPUDOUBLE_ARRAY(_f, _s, _n) \ VMSTATE_CPUDOUBLE_ARRAY_V(_f, _s, _n, 0) #define VMSTATE_BUFFER_V(_f, _s, _v) \ VMSTATE_STATIC_BUFFER(_f, _s, _v, NULL, 0, sizeof(typeof_field(_s, _f))) #define VMSTATE_BUFFER(_f, _s) \ VMSTATE_BUFFER_V(_f, _s, 0) #define VMSTATE_PARTIAL_BUFFER(_f, _s, _size) \ VMSTATE_STATIC_BUFFER(_f, _s, 0, NULL, 0, _size) #define VMSTATE_BUFFER_START_MIDDLE_V(_f, _s, _start, _v) \ VMSTATE_STATIC_BUFFER(_f, _s, _v, NULL, _start, sizeof(typeof_field(_s, _f))) #define VMSTATE_BUFFER_START_MIDDLE(_f, _s, _start) \ VMSTATE_BUFFER_START_MIDDLE_V(_f, _s, _start, 0) #define VMSTATE_PARTIAL_VBUFFER(_f, _s, _size) \ VMSTATE_VBUFFER(_f, _s, 0, NULL, _size) #define VMSTATE_PARTIAL_VBUFFER_UINT32(_f, _s, _size) \ VMSTATE_VBUFFER_UINT32(_f, _s, 0, NULL, _size) #define VMSTATE_BUFFER_TEST(_f, _s, _test) \ VMSTATE_STATIC_BUFFER(_f, _s, 0, _test, 0, sizeof(typeof_field(_s, _f))) #define VMSTATE_BUFFER_UNSAFE(_field, _state, _version, _size) \ VMSTATE_BUFFER_UNSAFE_INFO(_field, _state, _version, vmstate_info_buffer, _size) #define VMSTATE_UNUSED_V(_v, _size) \ VMSTATE_UNUSED_BUFFER(NULL, _v, _size) #define VMSTATE_UNUSED(_size) \ VMSTATE_UNUSED_V(0, _size) #define VMSTATE_UNUSED_TEST(_test, _size) \ VMSTATE_UNUSED_BUFFER(_test, 0, _size) #define VMSTATE_END_OF_LIST() \ {} #define SELF_ANNOUNCE_ROUNDS 5 void loadvm_free_handlers(MigrationIncomingState *mis); int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, void *opaque, int version_id); void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, void *opaque, QJSON *vmdesc); bool vmstate_save_needed(const VMStateDescription *vmsd, void *opaque); /* Returns: 0 on success, -1 on failure */ int vmstate_register_with_alias_id(DeviceState *dev, int instance_id, const VMStateDescription *vmsd, void *base, int alias_id, int required_for_version, Error **errp); /* Returns: 0 on success, -1 on failure */ static inline int vmstate_register(DeviceState *dev, int instance_id, const VMStateDescription *vmsd, void *opaque) { return vmstate_register_with_alias_id(dev, instance_id, vmsd, opaque, -1, 0, NULL); } void vmstate_unregister(DeviceState *dev, const VMStateDescription *vmsd, void *opaque); struct MemoryRegion; void vmstate_register_ram(struct MemoryRegion *memory, DeviceState *dev); void vmstate_unregister_ram(struct MemoryRegion *memory, DeviceState *dev); void vmstate_register_ram_global(struct MemoryRegion *memory); static inline int64_t self_announce_delay(int round) { assert(round < SELF_ANNOUNCE_ROUNDS && round > 0); /* delay 50ms, 150ms, 250ms, ... */ return 50 + (SELF_ANNOUNCE_ROUNDS - round - 1) * 100; } void dump_vmstate_json_to_file(FILE *out_fp); bool vmstate_check_only_migratable(const VMStateDescription *vmsd); #endif