aboutsummaryrefslogtreecommitdiff
path: root/migration/vmstate.c
diff options
context:
space:
mode:
Diffstat (limited to 'migration/vmstate.c')
-rw-r--r--migration/vmstate.c654
1 files changed, 12 insertions, 642 deletions
diff --git a/migration/vmstate.c b/migration/vmstate.c
index 66c50ee3f4..ff54531b44 100644
--- a/migration/vmstate.c
+++ b/migration/vmstate.c
@@ -1,3 +1,15 @@
+/*
+ * VMState interpreter
+ *
+ * Copyright (c) 2009-2017 Red Hat Inc
+ *
+ * Authors:
+ * Juan Quintela <quintela@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "migration/migration.h"
@@ -5,7 +17,6 @@
#include "migration/vmstate.h"
#include "qemu/bitops.h"
#include "qemu/error-report.h"
-#include "qemu/queue.h"
#include "trace.h"
#include "qjson.h"
@@ -475,644 +486,3 @@ static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd,
json_end_array(vmdesc);
}
}
-
-/* bool */
-
-static int get_bool(QEMUFile *f, void *pv, size_t size, VMStateField *field)
-{
- bool *v = pv;
- *v = qemu_get_byte(f);
- return 0;
-}
-
-static int put_bool(QEMUFile *f, void *pv, size_t size, VMStateField *field,
- QJSON *vmdesc)
-{
- bool *v = pv;
- qemu_put_byte(f, *v);
- return 0;
-}
-
-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, VMStateField *field)
-{
- int8_t *v = pv;
- qemu_get_s8s(f, v);
- return 0;
-}
-
-static int put_int8(QEMUFile *f, void *pv, size_t size, VMStateField *field,
- QJSON *vmdesc)
-{
- int8_t *v = pv;
- qemu_put_s8s(f, v);
- return 0;
-}
-
-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, VMStateField *field)
-{
- int16_t *v = pv;
- qemu_get_sbe16s(f, v);
- return 0;
-}
-
-static int put_int16(QEMUFile *f, void *pv, size_t size, VMStateField *field,
- QJSON *vmdesc)
-{
- int16_t *v = pv;
- qemu_put_sbe16s(f, v);
- return 0;
-}
-
-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, VMStateField *field)
-{
- int32_t *v = pv;
- qemu_get_sbe32s(f, v);
- return 0;
-}
-
-static int put_int32(QEMUFile *f, void *pv, size_t size, VMStateField *field,
- QJSON *vmdesc)
-{
- int32_t *v = pv;
- qemu_put_sbe32s(f, v);
- return 0;
-}
-
-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,
- VMStateField *field)
-{
- int32_t *v = pv;
- int32_t v2;
- qemu_get_sbe32s(f, &v2);
-
- if (*v == v2) {
- return 0;
- }
- error_report("%" PRIx32 " != %" PRIx32, *v, v2);
- 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, VMStateField *field)
-{
- int32_t *cur = pv;
- int32_t loaded;
- qemu_get_sbe32s(f, &loaded);
-
- if (loaded >= 0 && loaded <= *cur) {
- *cur = loaded;
- return 0;
- }
- error_report("Invalid value %" PRId32
- " expecting positive value <= %" PRId32,
- loaded, *cur);
- 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, VMStateField *field)
-{
- int64_t *v = pv;
- qemu_get_sbe64s(f, v);
- return 0;
-}
-
-static int put_int64(QEMUFile *f, void *pv, size_t size, VMStateField *field,
- QJSON *vmdesc)
-{
- int64_t *v = pv;
- qemu_put_sbe64s(f, v);
- return 0;
-}
-
-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, VMStateField *field)
-{
- uint8_t *v = pv;
- qemu_get_8s(f, v);
- return 0;
-}
-
-static int put_uint8(QEMUFile *f, void *pv, size_t size, VMStateField *field,
- QJSON *vmdesc)
-{
- uint8_t *v = pv;
- qemu_put_8s(f, v);
- return 0;
-}
-
-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, VMStateField *field)
-{
- uint16_t *v = pv;
- qemu_get_be16s(f, v);
- return 0;
-}
-
-static int put_uint16(QEMUFile *f, void *pv, size_t size, VMStateField *field,
- QJSON *vmdesc)
-{
- uint16_t *v = pv;
- qemu_put_be16s(f, v);
- return 0;
-}
-
-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, VMStateField *field)
-{
- uint32_t *v = pv;
- qemu_get_be32s(f, v);
- return 0;
-}
-
-static int put_uint32(QEMUFile *f, void *pv, size_t size, VMStateField *field,
- QJSON *vmdesc)
-{
- uint32_t *v = pv;
- qemu_put_be32s(f, v);
- return 0;
-}
-
-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,
- VMStateField *field)
-{
- uint32_t *v = pv;
- uint32_t v2;
- qemu_get_be32s(f, &v2);
-
- if (*v == v2) {
- return 0;
- }
- error_report("%" PRIx32 " != %" PRIx32, *v, v2);
- 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, VMStateField *field)
-{
- uint64_t *v = pv;
- qemu_get_be64s(f, v);
- return 0;
-}
-
-static int put_uint64(QEMUFile *f, void *pv, size_t size, VMStateField *field,
- QJSON *vmdesc)
-{
- uint64_t *v = pv;
- qemu_put_be64s(f, v);
- return 0;
-}
-
-const VMStateInfo vmstate_info_uint64 = {
- .name = "uint64",
- .get = get_uint64,
- .put = put_uint64,
-};
-
-static int get_nullptr(QEMUFile *f, void *pv, size_t size, VMStateField *field)
-
-{
- if (qemu_get_byte(f) == VMS_NULLPTR_MARKER) {
- return 0;
- }
- error_report("vmstate: get_nullptr expected VMS_NULLPTR_MARKER");
- return -EINVAL;
-}
-
-static int put_nullptr(QEMUFile *f, void *pv, size_t size,
- VMStateField *field, QJSON *vmdesc)
-
-{
- if (pv == NULL) {
- qemu_put_byte(f, VMS_NULLPTR_MARKER);
- return 0;
- }
- error_report("vmstate: put_nullptr must be called with pv == NULL");
- return -EINVAL;
-}
-
-const VMStateInfo vmstate_info_nullptr = {
- .name = "uint64",
- .get = get_nullptr,
- .put = put_nullptr,
-};
-
-/* 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,
- VMStateField *field)
-{
- uint64_t *v = pv;
- uint64_t v2;
- qemu_get_be64s(f, &v2);
-
- if (*v == v2) {
- return 0;
- }
- error_report("%" PRIx64 " != %" PRIx64, *v, v2);
- 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,
- VMStateField *field)
-{
- uint8_t *v = pv;
- uint8_t v2;
- qemu_get_8s(f, &v2);
-
- if (*v == v2) {
- return 0;
- }
- error_report("%x != %x", *v, v2);
- 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,
- VMStateField *field)
-{
- uint16_t *v = pv;
- uint16_t v2;
- qemu_get_be16s(f, &v2);
-
- if (*v == v2) {
- return 0;
- }
- error_report("%x != %x", *v, v2);
- 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,
- VMStateField *field)
-{
- float64 *v = pv;
-
- *v = make_float64(qemu_get_be64(f));
- return 0;
-}
-
-static int put_float64(QEMUFile *f, void *pv, size_t size, VMStateField *field,
- QJSON *vmdesc)
-{
- uint64_t *v = pv;
-
- qemu_put_be64(f, float64_val(*v));
- return 0;
-}
-
-const VMStateInfo vmstate_info_float64 = {
- .name = "float64",
- .get = get_float64,
- .put = put_float64,
-};
-
-/* CPU_DoubleU type */
-
-static int get_cpudouble(QEMUFile *f, void *pv, size_t size,
- VMStateField *field)
-{
- CPU_DoubleU *v = pv;
- qemu_get_be32s(f, &v->l.upper);
- qemu_get_be32s(f, &v->l.lower);
- return 0;
-}
-
-static int put_cpudouble(QEMUFile *f, void *pv, size_t size,
- VMStateField *field, QJSON *vmdesc)
-{
- CPU_DoubleU *v = pv;
- qemu_put_be32s(f, &v->l.upper);
- qemu_put_be32s(f, &v->l.lower);
- return 0;
-}
-
-const VMStateInfo vmstate_info_cpudouble = {
- .name = "CPU_Double_U",
- .get = get_cpudouble,
- .put = put_cpudouble,
-};
-
-/* uint8_t buffers */
-
-static int get_buffer(QEMUFile *f, void *pv, size_t size,
- VMStateField *field)
-{
- uint8_t *v = pv;
- qemu_get_buffer(f, v, size);
- return 0;
-}
-
-static int put_buffer(QEMUFile *f, void *pv, size_t size, VMStateField *field,
- QJSON *vmdesc)
-{
- uint8_t *v = pv;
- qemu_put_buffer(f, v, size);
- return 0;
-}
-
-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,
- VMStateField *field)
-{
- 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 int put_unused_buffer(QEMUFile *f, void *pv, size_t size,
- VMStateField *field, QJSON *vmdesc)
-{
- 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);
- }
-
- return 0;
-}
-
-const VMStateInfo vmstate_info_unused_buffer = {
- .name = "unused_buffer",
- .get = get_unused_buffer,
- .put = put_unused_buffer,
-};
-
-/* vmstate_info_tmp, see VMSTATE_WITH_TMP, the idea is that we allocate
- * a temporary buffer and the pre_load/pre_save methods in the child vmsd
- * copy stuff from the parent into the child and do calculations to fill
- * in fields that don't really exist in the parent but need to be in the
- * stream.
- */
-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,
-};
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-21 07:29:53 +0000