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https://github.com/xemu-project/xemu.git
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d2164ad35c
In some cases a failing VMSTATE_*_EQUAL does not mean we detected a bug, but it's actually the best we can do. Especially in these cases a verbose error message is required. Let's introduce infrastructure for specifying a error hint to be used if equal check fails. Let's do this by adding a parameter to the _EQUAL macros called _err_hint. Also change all current users to pass NULL as last parameter so nothing changes for them. Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com> Message-Id: <20170623144823.42936-1-pasic@linux.vnet.ibm.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
678 lines
16 KiB
C
678 lines
16 KiB
C
/*
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* VMStateInfo's for basic typse
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*
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* Copyright (c) 2009-2017 Red Hat Inc
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*
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* Authors:
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* Juan Quintela <quintela@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "exec/cpu-common.h"
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#include "qemu-file.h"
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#include "migration.h"
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#include "migration/vmstate.h"
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#include "qemu/error-report.h"
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#include "qemu/queue.h"
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#include "trace.h"
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/* bool */
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static int get_bool(QEMUFile *f, void *pv, size_t size, VMStateField *field)
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{
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bool *v = pv;
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*v = qemu_get_byte(f);
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return 0;
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}
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static int put_bool(QEMUFile *f, void *pv, size_t size, VMStateField *field,
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QJSON *vmdesc)
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{
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bool *v = pv;
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qemu_put_byte(f, *v);
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return 0;
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}
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const VMStateInfo vmstate_info_bool = {
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.name = "bool",
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.get = get_bool,
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.put = put_bool,
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};
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/* 8 bit int */
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static int get_int8(QEMUFile *f, void *pv, size_t size, VMStateField *field)
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{
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int8_t *v = pv;
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qemu_get_s8s(f, v);
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return 0;
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}
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static int put_int8(QEMUFile *f, void *pv, size_t size, VMStateField *field,
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QJSON *vmdesc)
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{
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int8_t *v = pv;
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qemu_put_s8s(f, v);
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return 0;
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}
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const VMStateInfo vmstate_info_int8 = {
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.name = "int8",
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.get = get_int8,
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.put = put_int8,
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};
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/* 16 bit int */
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static int get_int16(QEMUFile *f, void *pv, size_t size, VMStateField *field)
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{
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int16_t *v = pv;
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qemu_get_sbe16s(f, v);
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return 0;
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}
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static int put_int16(QEMUFile *f, void *pv, size_t size, VMStateField *field,
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QJSON *vmdesc)
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{
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int16_t *v = pv;
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qemu_put_sbe16s(f, v);
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return 0;
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}
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const VMStateInfo vmstate_info_int16 = {
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.name = "int16",
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.get = get_int16,
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.put = put_int16,
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};
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/* 32 bit int */
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static int get_int32(QEMUFile *f, void *pv, size_t size, VMStateField *field)
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{
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int32_t *v = pv;
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qemu_get_sbe32s(f, v);
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return 0;
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}
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static int put_int32(QEMUFile *f, void *pv, size_t size, VMStateField *field,
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QJSON *vmdesc)
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{
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int32_t *v = pv;
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qemu_put_sbe32s(f, v);
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return 0;
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}
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const VMStateInfo vmstate_info_int32 = {
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.name = "int32",
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.get = get_int32,
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.put = put_int32,
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};
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/* 32 bit int. See that the received value is the same than the one
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in the field */
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static int get_int32_equal(QEMUFile *f, void *pv, size_t size,
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VMStateField *field)
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{
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int32_t *v = pv;
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int32_t v2;
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qemu_get_sbe32s(f, &v2);
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if (*v == v2) {
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return 0;
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}
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error_report("%" PRIx32 " != %" PRIx32, *v, v2);
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if (field->err_hint) {
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error_printf("%s\n", field->err_hint);
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}
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return -EINVAL;
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}
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const VMStateInfo vmstate_info_int32_equal = {
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.name = "int32 equal",
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.get = get_int32_equal,
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.put = put_int32,
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};
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/* 32 bit int. Check that the received value is non-negative
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* and less than or equal to the one in the field.
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*/
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static int get_int32_le(QEMUFile *f, void *pv, size_t size, VMStateField *field)
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{
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int32_t *cur = pv;
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int32_t loaded;
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qemu_get_sbe32s(f, &loaded);
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if (loaded >= 0 && loaded <= *cur) {
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*cur = loaded;
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return 0;
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}
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error_report("Invalid value %" PRId32
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" expecting positive value <= %" PRId32,
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loaded, *cur);
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return -EINVAL;
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}
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const VMStateInfo vmstate_info_int32_le = {
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.name = "int32 le",
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.get = get_int32_le,
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.put = put_int32,
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};
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/* 64 bit int */
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static int get_int64(QEMUFile *f, void *pv, size_t size, VMStateField *field)
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{
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int64_t *v = pv;
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qemu_get_sbe64s(f, v);
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return 0;
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}
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static int put_int64(QEMUFile *f, void *pv, size_t size, VMStateField *field,
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QJSON *vmdesc)
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{
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int64_t *v = pv;
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qemu_put_sbe64s(f, v);
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return 0;
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}
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const VMStateInfo vmstate_info_int64 = {
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.name = "int64",
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.get = get_int64,
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.put = put_int64,
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};
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/* 8 bit unsigned int */
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static int get_uint8(QEMUFile *f, void *pv, size_t size, VMStateField *field)
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{
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uint8_t *v = pv;
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qemu_get_8s(f, v);
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return 0;
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}
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static int put_uint8(QEMUFile *f, void *pv, size_t size, VMStateField *field,
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QJSON *vmdesc)
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{
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uint8_t *v = pv;
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qemu_put_8s(f, v);
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return 0;
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}
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const VMStateInfo vmstate_info_uint8 = {
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.name = "uint8",
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.get = get_uint8,
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.put = put_uint8,
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};
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/* 16 bit unsigned int */
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static int get_uint16(QEMUFile *f, void *pv, size_t size, VMStateField *field)
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{
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uint16_t *v = pv;
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qemu_get_be16s(f, v);
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return 0;
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}
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static int put_uint16(QEMUFile *f, void *pv, size_t size, VMStateField *field,
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QJSON *vmdesc)
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{
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uint16_t *v = pv;
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qemu_put_be16s(f, v);
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return 0;
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}
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const VMStateInfo vmstate_info_uint16 = {
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.name = "uint16",
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.get = get_uint16,
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.put = put_uint16,
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};
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/* 32 bit unsigned int */
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static int get_uint32(QEMUFile *f, void *pv, size_t size, VMStateField *field)
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{
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uint32_t *v = pv;
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qemu_get_be32s(f, v);
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return 0;
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}
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static int put_uint32(QEMUFile *f, void *pv, size_t size, VMStateField *field,
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QJSON *vmdesc)
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{
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uint32_t *v = pv;
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qemu_put_be32s(f, v);
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return 0;
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}
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const VMStateInfo vmstate_info_uint32 = {
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.name = "uint32",
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.get = get_uint32,
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.put = put_uint32,
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};
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/* 32 bit uint. See that the received value is the same than the one
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in the field */
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static int get_uint32_equal(QEMUFile *f, void *pv, size_t size,
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VMStateField *field)
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{
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uint32_t *v = pv;
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uint32_t v2;
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qemu_get_be32s(f, &v2);
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if (*v == v2) {
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return 0;
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}
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error_report("%" PRIx32 " != %" PRIx32, *v, v2);
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if (field->err_hint) {
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error_printf("%s\n", field->err_hint);
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}
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return -EINVAL;
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}
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const VMStateInfo vmstate_info_uint32_equal = {
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.name = "uint32 equal",
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.get = get_uint32_equal,
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.put = put_uint32,
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};
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/* 64 bit unsigned int */
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static int get_uint64(QEMUFile *f, void *pv, size_t size, VMStateField *field)
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{
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uint64_t *v = pv;
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qemu_get_be64s(f, v);
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return 0;
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}
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static int put_uint64(QEMUFile *f, void *pv, size_t size, VMStateField *field,
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QJSON *vmdesc)
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{
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uint64_t *v = pv;
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qemu_put_be64s(f, v);
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return 0;
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}
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const VMStateInfo vmstate_info_uint64 = {
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.name = "uint64",
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.get = get_uint64,
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.put = put_uint64,
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};
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static int get_nullptr(QEMUFile *f, void *pv, size_t size, VMStateField *field)
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{
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if (qemu_get_byte(f) == VMS_NULLPTR_MARKER) {
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return 0;
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}
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error_report("vmstate: get_nullptr expected VMS_NULLPTR_MARKER");
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return -EINVAL;
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}
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static int put_nullptr(QEMUFile *f, void *pv, size_t size,
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VMStateField *field, QJSON *vmdesc)
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{
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if (pv == NULL) {
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qemu_put_byte(f, VMS_NULLPTR_MARKER);
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return 0;
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}
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error_report("vmstate: put_nullptr must be called with pv == NULL");
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return -EINVAL;
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}
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const VMStateInfo vmstate_info_nullptr = {
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.name = "uint64",
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.get = get_nullptr,
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.put = put_nullptr,
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};
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/* 64 bit unsigned int. See that the received value is the same than the one
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in the field */
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static int get_uint64_equal(QEMUFile *f, void *pv, size_t size,
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VMStateField *field)
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{
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uint64_t *v = pv;
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uint64_t v2;
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qemu_get_be64s(f, &v2);
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if (*v == v2) {
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return 0;
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}
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error_report("%" PRIx64 " != %" PRIx64, *v, v2);
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if (field->err_hint) {
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error_printf("%s\n", field->err_hint);
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}
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return -EINVAL;
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}
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const VMStateInfo vmstate_info_uint64_equal = {
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.name = "int64 equal",
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.get = get_uint64_equal,
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.put = put_uint64,
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};
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/* 8 bit int. See that the received value is the same than the one
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in the field */
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static int get_uint8_equal(QEMUFile *f, void *pv, size_t size,
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VMStateField *field)
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{
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uint8_t *v = pv;
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uint8_t v2;
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qemu_get_8s(f, &v2);
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if (*v == v2) {
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return 0;
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}
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error_report("%x != %x", *v, v2);
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if (field->err_hint) {
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error_printf("%s\n", field->err_hint);
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}
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return -EINVAL;
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}
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const VMStateInfo vmstate_info_uint8_equal = {
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.name = "uint8 equal",
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.get = get_uint8_equal,
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.put = put_uint8,
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};
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/* 16 bit unsigned int int. See that the received value is the same than the one
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in the field */
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static int get_uint16_equal(QEMUFile *f, void *pv, size_t size,
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VMStateField *field)
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{
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uint16_t *v = pv;
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uint16_t v2;
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qemu_get_be16s(f, &v2);
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if (*v == v2) {
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return 0;
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}
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error_report("%x != %x", *v, v2);
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if (field->err_hint) {
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error_printf("%s\n", field->err_hint);
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}
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return -EINVAL;
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}
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const VMStateInfo vmstate_info_uint16_equal = {
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.name = "uint16 equal",
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.get = get_uint16_equal,
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.put = put_uint16,
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};
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/* floating point */
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static int get_float64(QEMUFile *f, void *pv, size_t size,
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VMStateField *field)
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{
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float64 *v = pv;
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*v = make_float64(qemu_get_be64(f));
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return 0;
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}
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static int put_float64(QEMUFile *f, void *pv, size_t size, VMStateField *field,
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QJSON *vmdesc)
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{
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uint64_t *v = pv;
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qemu_put_be64(f, float64_val(*v));
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return 0;
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}
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const VMStateInfo vmstate_info_float64 = {
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.name = "float64",
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.get = get_float64,
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.put = put_float64,
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};
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/* CPU_DoubleU type */
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static int get_cpudouble(QEMUFile *f, void *pv, size_t size,
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VMStateField *field)
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{
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CPU_DoubleU *v = pv;
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qemu_get_be32s(f, &v->l.upper);
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qemu_get_be32s(f, &v->l.lower);
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return 0;
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}
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static int put_cpudouble(QEMUFile *f, void *pv, size_t size,
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VMStateField *field, QJSON *vmdesc)
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{
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CPU_DoubleU *v = pv;
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qemu_put_be32s(f, &v->l.upper);
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qemu_put_be32s(f, &v->l.lower);
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return 0;
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}
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const VMStateInfo vmstate_info_cpudouble = {
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.name = "CPU_Double_U",
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.get = get_cpudouble,
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.put = put_cpudouble,
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};
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/* uint8_t buffers */
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static int get_buffer(QEMUFile *f, void *pv, size_t size,
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VMStateField *field)
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{
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uint8_t *v = pv;
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qemu_get_buffer(f, v, size);
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return 0;
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}
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static int put_buffer(QEMUFile *f, void *pv, size_t size, VMStateField *field,
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QJSON *vmdesc)
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{
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uint8_t *v = pv;
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qemu_put_buffer(f, v, size);
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return 0;
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}
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const VMStateInfo vmstate_info_buffer = {
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.name = "buffer",
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.get = get_buffer,
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.put = put_buffer,
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};
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/* unused buffers: space that was used for some fields that are
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not useful anymore */
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static int get_unused_buffer(QEMUFile *f, void *pv, size_t size,
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VMStateField *field)
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{
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uint8_t buf[1024];
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int block_len;
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while (size > 0) {
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block_len = MIN(sizeof(buf), size);
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size -= block_len;
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qemu_get_buffer(f, buf, block_len);
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}
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return 0;
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}
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static int put_unused_buffer(QEMUFile *f, void *pv, size_t size,
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VMStateField *field, QJSON *vmdesc)
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{
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static const uint8_t buf[1024];
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int block_len;
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while (size > 0) {
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block_len = MIN(sizeof(buf), size);
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size -= block_len;
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qemu_put_buffer(f, buf, block_len);
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}
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return 0;
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}
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const VMStateInfo vmstate_info_unused_buffer = {
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.name = "unused_buffer",
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.get = get_unused_buffer,
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.put = put_unused_buffer,
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};
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/* vmstate_info_tmp, see VMSTATE_WITH_TMP, the idea is that we allocate
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* a temporary buffer and the pre_load/pre_save methods in the child vmsd
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* copy stuff from the parent into the child and do calculations to fill
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* in fields that don't really exist in the parent but need to be in the
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* stream.
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*/
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static int get_tmp(QEMUFile *f, void *pv, size_t size, VMStateField *field)
|
|
{
|
|
int ret;
|
|
const VMStateDescription *vmsd = field->vmsd;
|
|
int version_id = field->version_id;
|
|
void *tmp = g_malloc(size);
|
|
|
|
/* Writes the parent field which is at the start of the tmp */
|
|
*(void **)tmp = pv;
|
|
ret = vmstate_load_state(f, vmsd, tmp, version_id);
|
|
g_free(tmp);
|
|
return ret;
|
|
}
|
|
|
|
static int put_tmp(QEMUFile *f, void *pv, size_t size, VMStateField *field,
|
|
QJSON *vmdesc)
|
|
{
|
|
const VMStateDescription *vmsd = field->vmsd;
|
|
void *tmp = g_malloc(size);
|
|
|
|
/* Writes the parent field which is at the start of the tmp */
|
|
*(void **)tmp = pv;
|
|
vmstate_save_state(f, vmsd, tmp, vmdesc);
|
|
g_free(tmp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_tmp = {
|
|
.name = "tmp",
|
|
.get = get_tmp,
|
|
.put = put_tmp,
|
|
};
|
|
|
|
/* 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, VMStateField *field)
|
|
{
|
|
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 int put_bitmap(QEMUFile *f, void *pv, size_t size, VMStateField *field,
|
|
QJSON *vmdesc)
|
|
{
|
|
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);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
const VMStateInfo vmstate_info_bitmap = {
|
|
.name = "bitmap",
|
|
.get = get_bitmap,
|
|
.put = put_bitmap,
|
|
};
|
|
|
|
/* get for QTAILQ
|
|
* meta data about the QTAILQ is encoded in a VMStateField structure
|
|
*/
|
|
static int get_qtailq(QEMUFile *f, void *pv, size_t unused_size,
|
|
VMStateField *field)
|
|
{
|
|
int ret = 0;
|
|
const VMStateDescription *vmsd = field->vmsd;
|
|
/* size of a QTAILQ element */
|
|
size_t size = field->size;
|
|
/* offset of the QTAILQ entry in a QTAILQ element */
|
|
size_t entry_offset = field->start;
|
|
int version_id = field->version_id;
|
|
void *elm;
|
|
|
|
trace_get_qtailq(vmsd->name, version_id);
|
|
if (version_id > vmsd->version_id) {
|
|
error_report("%s %s", vmsd->name, "too new");
|
|
trace_get_qtailq_end(vmsd->name, "too new", -EINVAL);
|
|
|
|
return -EINVAL;
|
|
}
|
|
if (version_id < vmsd->minimum_version_id) {
|
|
error_report("%s %s", vmsd->name, "too old");
|
|
trace_get_qtailq_end(vmsd->name, "too old", -EINVAL);
|
|
return -EINVAL;
|
|
}
|
|
|
|
while (qemu_get_byte(f)) {
|
|
elm = g_malloc(size);
|
|
ret = vmstate_load_state(f, vmsd, elm, version_id);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
QTAILQ_RAW_INSERT_TAIL(pv, elm, entry_offset);
|
|
}
|
|
|
|
trace_get_qtailq_end(vmsd->name, "end", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* put for QTAILQ */
|
|
static int put_qtailq(QEMUFile *f, void *pv, size_t unused_size,
|
|
VMStateField *field, QJSON *vmdesc)
|
|
{
|
|
const VMStateDescription *vmsd = field->vmsd;
|
|
/* offset of the QTAILQ entry in a QTAILQ element*/
|
|
size_t entry_offset = field->start;
|
|
void *elm;
|
|
|
|
trace_put_qtailq(vmsd->name, vmsd->version_id);
|
|
|
|
QTAILQ_RAW_FOREACH(elm, pv, entry_offset) {
|
|
qemu_put_byte(f, true);
|
|
vmstate_save_state(f, vmsd, elm, vmdesc);
|
|
}
|
|
qemu_put_byte(f, false);
|
|
|
|
trace_put_qtailq_end(vmsd->name, "end");
|
|
|
|
return 0;
|
|
}
|
|
const VMStateInfo vmstate_info_qtailq = {
|
|
.name = "qtailq",
|
|
.get = get_qtailq,
|
|
.put = put_qtailq,
|
|
};
|