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-rw-r--r--slirp/Makefile.objs2
-rw-r--r--slirp/libslirp.h2
-rw-r--r--slirp/stream.c119
-rw-r--r--slirp/stream.h34
-rw-r--r--slirp/vmstate.c413
-rw-r--r--slirp/vmstate.h396
6 files changed, 966 insertions, 0 deletions
diff --git a/slirp/Makefile.objs b/slirp/Makefile.objs
index 88340a583b..69e140f965 100644
--- a/slirp/Makefile.objs
+++ b/slirp/Makefile.objs
@@ -21,6 +21,7 @@ slirp.mo-objs = \
slirp.o \
socket.o \
state.o \
+ stream.o \
tcp_input.o \
tcp_output.o \
tcp_subr.o \
@@ -29,6 +30,7 @@ slirp.mo-objs = \
udp.o \
udp6.o \
util.o \
+ vmstate.o \
$(NULL)
slirp.mo-cflags = -DG_LOG_DOMAIN=\"Slirp\" -DWITH_QEMU
diff --git a/slirp/libslirp.h b/slirp/libslirp.h
index fccab42518..57bd6f597c 100644
--- a/slirp/libslirp.h
+++ b/slirp/libslirp.h
@@ -3,6 +3,7 @@
#include <stdint.h>
#include <stdbool.h>
+#include <sys/types.h>
#ifdef _WIN32
#include <winsock2.h>
@@ -26,6 +27,7 @@ enum {
SLIRP_POLL_HUP = 1 << 4,
};
+typedef ssize_t (*SlirpReadCb)(void *buf, size_t len, void *opaque);
typedef ssize_t (*SlirpWriteCb)(const void *buf, size_t len, void *opaque);
typedef void (*SlirpTimerCb)(void *opaque);
typedef int (*SlirpAddPollCb)(int fd, int events, void *opaque);
diff --git a/slirp/stream.c b/slirp/stream.c
new file mode 100644
index 0000000000..d114dde334
--- /dev/null
+++ b/slirp/stream.c
@@ -0,0 +1,119 @@
+/*
+ * libslirp io streams
+ *
+ * Copyright (c) 2018 Red Hat, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "stream.h"
+#include <glib.h>
+
+bool slirp_istream_read(SlirpIStream *f, void *buf, size_t size)
+{
+ return f->read_cb(buf, size, f->opaque) == size;
+}
+
+bool slirp_ostream_write(SlirpOStream *f, const void *buf, size_t size)
+{
+ return f->write_cb(buf, size, f->opaque) == size;
+}
+
+uint8_t slirp_istream_read_u8(SlirpIStream *f)
+{
+ uint8_t b;
+
+ if (slirp_istream_read(f, &b, sizeof(b))) {
+ return b;
+ }
+
+ return 0;
+}
+
+bool slirp_ostream_write_u8(SlirpOStream *f, uint8_t b)
+{
+ return slirp_ostream_write(f, &b, sizeof(b));
+}
+
+uint16_t slirp_istream_read_u16(SlirpIStream *f)
+{
+ uint16_t b;
+
+ if (slirp_istream_read(f, &b, sizeof(b))) {
+ return GUINT16_FROM_BE(b);
+ }
+
+ return 0;
+}
+
+bool slirp_ostream_write_u16(SlirpOStream *f, uint16_t b)
+{
+ b = GUINT16_TO_BE(b);
+ return slirp_ostream_write(f, &b, sizeof(b));
+}
+
+uint32_t slirp_istream_read_u32(SlirpIStream *f)
+{
+ uint32_t b;
+
+ if (slirp_istream_read(f, &b, sizeof(b))) {
+ return GUINT32_FROM_BE(b);
+ }
+
+ return 0;
+}
+
+bool slirp_ostream_write_u32(SlirpOStream *f, uint32_t b)
+{
+ b = GUINT32_TO_BE(b);
+ return slirp_ostream_write(f, &b, sizeof(b));
+}
+
+int16_t slirp_istream_read_i16(SlirpIStream *f)
+{
+ int16_t b;
+
+ if (slirp_istream_read(f, &b, sizeof(b))) {
+ return GINT16_FROM_BE(b);
+ }
+
+ return 0;
+}
+
+bool slirp_ostream_write_i16(SlirpOStream *f, int16_t b)
+{
+ b = GINT16_TO_BE(b);
+ return slirp_ostream_write(f, &b, sizeof(b));
+}
+
+int32_t slirp_istream_read_i32(SlirpIStream *f)
+{
+ int32_t b;
+
+ if (slirp_istream_read(f, &b, sizeof(b))) {
+ return GINT32_FROM_BE(b);
+ }
+
+ return 0;
+}
+
+bool slirp_ostream_write_i32(SlirpOStream *f, int32_t b)
+{
+ b = GINT32_TO_BE(b);
+ return slirp_ostream_write(f, &b, sizeof(b));
+}
diff --git a/slirp/stream.h b/slirp/stream.h
new file mode 100644
index 0000000000..985334c043
--- /dev/null
+++ b/slirp/stream.h
@@ -0,0 +1,34 @@
+#ifndef STREAM_H_
+#define STREAM_H_
+
+#include "libslirp.h"
+
+typedef struct SlirpIStream {
+ SlirpReadCb read_cb;
+ void *opaque;
+} SlirpIStream;
+
+typedef struct SlirpOStream {
+ SlirpWriteCb write_cb;
+ void *opaque;
+} SlirpOStream;
+
+bool slirp_istream_read(SlirpIStream *f, void *buf, size_t size);
+bool slirp_ostream_write(SlirpOStream *f, const void *buf, size_t size);
+
+uint8_t slirp_istream_read_u8(SlirpIStream *f);
+bool slirp_ostream_write_u8(SlirpOStream *f, uint8_t b);
+
+uint16_t slirp_istream_read_u16(SlirpIStream *f);
+bool slirp_ostream_write_u16(SlirpOStream *f, uint16_t b);
+
+uint32_t slirp_istream_read_u32(SlirpIStream *f);
+bool slirp_ostream_write_u32(SlirpOStream *f, uint32_t b);
+
+int16_t slirp_istream_read_i16(SlirpIStream *f);
+bool slirp_ostream_write_i16(SlirpOStream *f, int16_t b);
+
+int32_t slirp_istream_read_i32(SlirpIStream *f);
+bool slirp_ostream_write_i32(SlirpOStream *f, int32_t b);
+
+#endif /* STREAM_H_ */
diff --git a/slirp/vmstate.c b/slirp/vmstate.c
new file mode 100644
index 0000000000..4d08b47c61
--- /dev/null
+++ b/slirp/vmstate.c
@@ -0,0 +1,413 @@
+/*
+ * VMState interpreter
+ *
+ * Copyright (c) 2009-2018 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 <assert.h>
+#include <errno.h>
+#include <string.h>
+#include <glib.h>
+
+#include "stream.h"
+#include "vmstate.h"
+
+static int get_nullptr(SlirpIStream *f, void *pv, size_t size,
+ const VMStateField *field)
+{
+ if (slirp_istream_read_u8(f) == VMS_NULLPTR_MARKER) {
+ return 0;
+ }
+ g_warning("vmstate: get_nullptr expected VMS_NULLPTR_MARKER");
+ return -EINVAL;
+}
+
+static int put_nullptr(SlirpOStream *f, void *pv, size_t size,
+ const VMStateField *field)
+
+{
+ if (pv == NULL) {
+ slirp_ostream_write_u8(f, VMS_NULLPTR_MARKER);
+ return 0;
+ }
+ g_warning("vmstate: put_nullptr must be called with pv == NULL");
+ return -EINVAL;
+}
+
+const VMStateInfo slirp_vmstate_info_nullptr = {
+ .name = "uint64",
+ .get = get_nullptr,
+ .put = put_nullptr,
+};
+
+/* 8 bit unsigned int */
+
+static int get_uint8(SlirpIStream *f, void *pv, size_t size, const VMStateField *field)
+{
+ uint8_t *v = pv;
+ *v = slirp_istream_read_u8(f);
+ return 0;
+}
+
+static int put_uint8(SlirpOStream *f, void *pv, size_t size, const VMStateField *field)
+{
+ uint8_t *v = pv;
+ slirp_ostream_write_u8(f, *v);
+ return 0;
+}
+
+const VMStateInfo slirp_vmstate_info_uint8 = {
+ .name = "uint8",
+ .get = get_uint8,
+ .put = put_uint8,
+};
+
+/* 16 bit unsigned int */
+
+static int get_uint16(SlirpIStream *f, void *pv, size_t size,
+ const VMStateField *field)
+{
+ uint16_t *v = pv;
+ *v = slirp_istream_read_u16(f);
+ return 0;
+}
+
+static int put_uint16(SlirpOStream *f, void *pv, size_t size,
+ const VMStateField *field)
+{
+ uint16_t *v = pv;
+ slirp_ostream_write_u16(f, *v);
+ return 0;
+}
+
+const VMStateInfo slirp_vmstate_info_uint16 = {
+ .name = "uint16",
+ .get = get_uint16,
+ .put = put_uint16,
+};
+
+/* 32 bit unsigned int */
+
+static int get_uint32(SlirpIStream *f, void *pv, size_t size,
+ const VMStateField *field)
+{
+ uint32_t *v = pv;
+ *v = slirp_istream_read_u32(f);
+ return 0;
+}
+
+static int put_uint32(SlirpOStream *f, void *pv, size_t size,
+ const VMStateField *field)
+{
+ uint32_t *v = pv;
+ slirp_ostream_write_u32(f, *v);
+ return 0;
+}
+
+const VMStateInfo slirp_vmstate_info_uint32 = {
+ .name = "uint32",
+ .get = get_uint32,
+ .put = put_uint32,
+};
+
+/* 16 bit int */
+
+static int get_int16(SlirpIStream *f, void *pv, size_t size, const VMStateField *field)
+{
+ int16_t *v = pv;
+ *v = slirp_istream_read_i16(f);
+ return 0;
+}
+
+static int put_int16(SlirpOStream *f, void *pv, size_t size, const VMStateField *field)
+{
+ int16_t *v = pv;
+ slirp_ostream_write_i16(f, *v);
+ return 0;
+}
+
+const VMStateInfo slirp_vmstate_info_int16 = {
+ .name = "int16",
+ .get = get_int16,
+ .put = put_int16,
+};
+
+/* 32 bit int */
+
+static int get_int32(SlirpIStream *f, void *pv, size_t size, const VMStateField *field)
+{
+ int32_t *v = pv;
+ *v = slirp_istream_read_i32(f);
+ return 0;
+}
+
+static int put_int32(SlirpOStream *f, void *pv, size_t size, const VMStateField *field)
+{
+ int32_t *v = pv;
+ slirp_ostream_write_i32(f, *v);
+ return 0;
+}
+
+const VMStateInfo slirp_vmstate_info_int32 = {
+ .name = "int32",
+ .get = get_int32,
+ .put = put_int32,
+};
+
+/* 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(SlirpIStream *f, void *pv, size_t size, const 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 = slirp_vmstate_load_state(f, vmsd, tmp, version_id);
+ g_free(tmp);
+ return ret;
+}
+
+static int put_tmp(SlirpOStream *f, void *pv, size_t size, const VMStateField *field)
+{
+ const VMStateDescription *vmsd = field->vmsd;
+ void *tmp = g_malloc(size);
+ int ret;
+
+ /* Writes the parent field which is at the start of the tmp */
+ *(void **)tmp = pv;
+ ret = slirp_vmstate_save_state(f, vmsd, tmp);
+ g_free(tmp);
+
+ return ret;
+}
+
+const VMStateInfo slirp_vmstate_info_tmp = {
+ .name = "tmp",
+ .get = get_tmp,
+ .put = put_tmp,
+};
+
+/* uint8_t buffers */
+
+static int get_buffer(SlirpIStream *f, void *pv, size_t size,
+ const VMStateField *field)
+{
+ slirp_istream_read(f, pv, size);
+ return 0;
+}
+
+static int put_buffer(SlirpOStream *f, void *pv, size_t size,
+ const VMStateField *field)
+{
+ slirp_ostream_write(f, pv, size);
+ return 0;
+}
+
+const VMStateInfo slirp_vmstate_info_buffer = {
+ .name = "buffer",
+ .get = get_buffer,
+ .put = put_buffer,
+};
+
+static int vmstate_n_elems(void *opaque, const 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);
+ }
+
+ if (field->flags & VMS_MULTIPLY_ELEMENTS) {
+ n_elems *= field->num;
+ }
+
+ return n_elems;
+}
+
+static int vmstate_size(void *opaque, const 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 int
+vmstate_save_state_v(SlirpOStream *f, const VMStateDescription *vmsd,
+ void *opaque, int version_id)
+{
+ int ret = 0;
+ const VMStateField *field = vmsd->fields;
+
+ if (vmsd->pre_save) {
+ ret = vmsd->pre_save(opaque);
+ if (ret) {
+ g_warning("pre-save failed: %s", vmsd->name);
+ return ret;
+ }
+ }
+
+ while (field->name) {
+ if ((field->field_exists &&
+ field->field_exists(opaque, version_id)) ||
+ (!field->field_exists &&
+ field->version_id <= version_id)) {
+ void *first_elem = opaque + field->offset;
+ int i, n_elems = vmstate_n_elems(opaque, field);
+ int size = vmstate_size(opaque, field);
+
+ if (field->flags & VMS_POINTER) {
+ first_elem = *(void **)first_elem;
+ assert(first_elem || !n_elems || !size);
+ }
+ for (i = 0; i < n_elems; i++) {
+ void *curr_elem = first_elem + size * i;
+ ret = 0;
+
+ if (field->flags & VMS_ARRAY_OF_POINTER) {
+ assert(curr_elem);
+ curr_elem = *(void **)curr_elem;
+ }
+ if (!curr_elem && size) {
+ /* if null pointer write placeholder and do not follow */
+ assert(field->flags & VMS_ARRAY_OF_POINTER);
+ ret = slirp_vmstate_info_nullptr.put(f, curr_elem, size, NULL);
+ } else if (field->flags & VMS_STRUCT) {
+ ret = slirp_vmstate_save_state(f, field->vmsd, curr_elem);
+ } else if (field->flags & VMS_VSTRUCT) {
+ ret = vmstate_save_state_v(f, field->vmsd, curr_elem,
+ field->struct_version_id);
+ } else {
+ ret = field->info->put(f, curr_elem, size, field);
+ }
+ if (ret) {
+ g_warning("Save of field %s/%s failed",
+ vmsd->name, field->name);
+ return ret;
+ }
+ }
+ } else {
+ if (field->flags & VMS_MUST_EXIST) {
+ g_warning("Output state validation failed: %s/%s",
+ vmsd->name, field->name);
+ assert(!(field->flags & VMS_MUST_EXIST));
+ }
+ }
+ field++;
+ }
+
+ return 0;
+}
+
+int slirp_vmstate_save_state(SlirpOStream *f, const VMStateDescription *vmsd,
+ void *opaque)
+{
+ return vmstate_save_state_v(f, vmsd, opaque, vmsd->version_id);
+}
+
+static void vmstate_handle_alloc(void *ptr, VMStateField *field, void *opaque)
+{
+ if (field->flags & VMS_POINTER && field->flags & VMS_ALLOC) {
+ size_t size = vmstate_size(opaque, field);
+ size *= vmstate_n_elems(opaque, field);
+ if (size) {
+ *(void **)ptr = g_malloc(size);
+ }
+ }
+}
+
+int slirp_vmstate_load_state(SlirpIStream *f, const VMStateDescription *vmsd,
+ void *opaque, int version_id)
+{
+ VMStateField *field = vmsd->fields;
+ int ret = 0;
+
+ if (version_id > vmsd->version_id) {
+ g_warning("%s: incoming version_id %d is too new "
+ "for local version_id %d",
+ vmsd->name, version_id, vmsd->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 *first_elem = opaque + field->offset;
+ int i, n_elems = vmstate_n_elems(opaque, field);
+ int size = vmstate_size(opaque, field);
+
+ vmstate_handle_alloc(first_elem, field, opaque);
+ if (field->flags & VMS_POINTER) {
+ first_elem = *(void **)first_elem;
+ assert(first_elem || !n_elems || !size);
+ }
+ for (i = 0; i < n_elems; i++) {
+ void *curr_elem = first_elem + size * i;
+
+ if (field->flags & VMS_ARRAY_OF_POINTER) {
+ curr_elem = *(void **)curr_elem;
+ }
+ if (!curr_elem && size) {
+ /* if null pointer check placeholder and do not follow */
+ assert(field->flags & VMS_ARRAY_OF_POINTER);
+ ret = slirp_vmstate_info_nullptr.get(f, curr_elem, size, NULL);
+ } else if (field->flags & VMS_STRUCT) {
+ ret = slirp_vmstate_load_state(f, field->vmsd, curr_elem,
+ field->vmsd->version_id);
+ } else if (field->flags & VMS_VSTRUCT) {
+ ret = slirp_vmstate_load_state(f, field->vmsd, curr_elem,
+ field->struct_version_id);
+ } else {
+ ret = field->info->get(f, curr_elem, size, field);
+ }
+ if (ret < 0) {
+ g_warning("Failed to load %s:%s", vmsd->name,
+ field->name);
+ return ret;
+ }
+ }
+ } else if (field->flags & VMS_MUST_EXIST) {
+ g_warning("Input validation failed: %s/%s",
+ vmsd->name, field->name);
+ return -1;
+ }
+ field++;
+ }
+ if (vmsd->post_load) {
+ ret = vmsd->post_load(opaque, version_id);
+ }
+ return ret;
+}
diff --git a/slirp/vmstate.h b/slirp/vmstate.h
new file mode 100644
index 0000000000..cfa7b8c825
--- /dev/null
+++ b/slirp/vmstate.h
@@ -0,0 +1,396 @@
+/*
+ * QEMU migration/snapshot declarations
+ *
+ * Copyright (c) 2009-2011 Red Hat, Inc.
+ *
+ * Original author: Juan Quintela <quintela@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef VMSTATE_H_
+#define VMSTATE_H_
+
+#include <unistd.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "slirp.h"
+#include "stream.h"
+
+#define stringify(s) tostring(s)
+#define tostring(s) #s
+
+typedef struct VMStateInfo VMStateInfo;
+typedef struct VMStateDescription VMStateDescription;
+typedef struct VMStateField VMStateField;
+
+int slirp_vmstate_save_state(SlirpOStream *f, const VMStateDescription *vmsd,
+ void *opaque);
+int slirp_vmstate_load_state(SlirpIStream *f, const VMStateDescription *vmsd,
+ void *opaque, int version_id);
+
+/* 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)(SlirpIStream *f, void *pv, size_t size, const VMStateField *field);
+ int (*put)(SlirpOStream *f, void *pv, size_t size, const VMStateField *field);
+};
+
+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,
+
+ /* A structure field that is like VMS_STRUCT, but uses
+ * VMStateField.struct_version_id to tell which version of the
+ * structure we are referencing to use. */
+ VMS_VSTRUCT = 0x8000,
+};
+
+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;
+ int struct_version_id;
+ bool (*field_exists)(void *opaque, int version_id);
+};
+
+struct VMStateDescription {
+ const char *name;
+ int version_id;
+ int (*pre_load)(void *opaque);
+ int (*post_load)(void *opaque, int version_id);
+ int (*pre_save)(void *opaque);
+ VMStateField *fields;
+};
+
+
+extern const VMStateInfo slirp_vmstate_info_int16;
+extern const VMStateInfo slirp_vmstate_info_int32;
+extern const VMStateInfo slirp_vmstate_info_uint8;
+extern const VMStateInfo slirp_vmstate_info_uint16;
+extern const VMStateInfo slirp_vmstate_info_uint32;
+
+/** Put this in the stream when migrating a null pointer.*/
+#define VMS_NULLPTR_MARKER (0x30U) /* '0' */
+extern const VMStateInfo slirp_vmstate_info_nullptr;
+
+extern const VMStateInfo slirp_vmstate_info_buffer;
+extern const VMStateInfo slirp_vmstate_info_tmp;
+
+#define type_check_array(t1,t2,n) ((t1(*)[n])0 - (t2*)0)
+#define type_check_pointer(t1,t2) ((t1**)0 - (t2*)0)
+#define typeof_field(type, field) typeof(((type *)0)->field)
+#define type_check(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_buffer(_state, _field) \
+ vmstate_offset_array(_state, _field, uint8_t, \
+ sizeof(typeof_field(_state, _field)))
+
+/* In the macros below, if there is a _version, that means the macro's
+ * field will be processed only if the version being received is >=
+ * the _version specified. In general, if you add a new field, you
+ * would increment the structure's version and put that version
+ * number into the new field so it would only be processed with the
+ * new version.
+ *
+ * In particular, for VMSTATE_STRUCT() and friends the _version does
+ * *NOT* pick the version of the sub-structure. It works just as
+ * specified above. The version of the top-level structure received
+ * is passed down to all sub-structures. This means that the
+ * sub-structures must have version that are compatible with all the
+ * structures that use them.
+ *
+ * If you want to specify the version of the sub-structure, use
+ * VMSTATE_VSTRUCT(), which allows the specific sub-structure version
+ * to be directly specified.
+ */
+
+#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), \
+}
+
+#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_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_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_STATIC_BUFFER(_field, _state, _version, _test, _start, _size) { \
+ .name = (stringify(_field)), \
+ .version_id = (_version), \
+ .field_exists = (_test), \
+ .size = (_size - _start), \
+ .info = &slirp_vmstate_info_buffer, \
+ .flags = VMS_BUFFER, \
+ .offset = vmstate_offset_buffer(_state, _field) + _start, \
+}
+
+#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 = &slirp_vmstate_info_buffer, \
+ .flags = VMS_VBUFFER|VMS_POINTER, \
+ .offset = offsetof(_state, _field), \
+}
+
+#define QEMU_BUILD_BUG_ON_STRUCT(x) \
+ struct { \
+ int:(x) ? -1 : 1; \
+ }
+
+#define QEMU_BUILD_BUG_ON_ZERO(x) (sizeof(QEMU_BUILD_BUG_ON_STRUCT(x)) - \
+ sizeof(QEMU_BUILD_BUG_ON_STRUCT(x)))
+
+/* 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 = &slirp_vmstate_info_tmp, \
+}
+
+#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_ARRAY(_field, _state, _num, _version, _vmsd, _type) \
+ VMSTATE_STRUCT_ARRAY_TEST(_field, _state, _num, NULL, _version, \
+ _vmsd, _type)
+
+#define VMSTATE_INT16_V(_f, _s, _v) \
+ VMSTATE_SINGLE(_f, _s, _v, slirp_vmstate_info_int16, int16_t)
+#define VMSTATE_INT32_V(_f, _s, _v) \
+ VMSTATE_SINGLE(_f, _s, _v, slirp_vmstate_info_int32, int32_t)
+
+#define VMSTATE_UINT8_V(_f, _s, _v) \
+ VMSTATE_SINGLE(_f, _s, _v, slirp_vmstate_info_uint8, uint8_t)
+#define VMSTATE_UINT16_V(_f, _s, _v) \
+ VMSTATE_SINGLE(_f, _s, _v, slirp_vmstate_info_uint16, uint16_t)
+#define VMSTATE_UINT32_V(_f, _s, _v) \
+ VMSTATE_SINGLE(_f, _s, _v, slirp_vmstate_info_uint32, uint32_t)
+
+#define VMSTATE_INT16(_f, _s) \
+ VMSTATE_INT16_V(_f, _s, 0)
+#define VMSTATE_INT32(_f, _s) \
+ VMSTATE_INT32_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_UINT16_TEST(_f, _s, _t) \
+ VMSTATE_SINGLE_TEST(_f, _s, _t, 0, slirp_vmstate_info_uint16, uint16_t)
+
+#define VMSTATE_UINT32_TEST(_f, _s, _t) \
+ VMSTATE_SINGLE_TEST(_f, _s, _t, 0, slirp_vmstate_info_uint32, uint32_t)
+
+#define VMSTATE_INT16_ARRAY_V(_f, _s, _n, _v) \
+ VMSTATE_ARRAY(_f, _s, _n, _v, slirp_vmstate_info_int16, int16_t)
+
+#define VMSTATE_INT16_ARRAY(_f, _s, _n) \
+ VMSTATE_INT16_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_END_OF_LIST() \
+ {}
+
+#endif
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-01 09:09:07 +0000