#include "qemu/timer.h"
#include "audio/audio.h"
#include "migration/migration.h"
+#include "qapi/qmp/qerror.h"
+#include "qemu/error-report.h"
#include "qemu/sockets.h"
#include "qemu/queue.h"
#include "sysemu/cpus.h"
typedef struct SaveState {
QTAILQ_HEAD(, SaveStateEntry) handlers;
int global_section_id;
+ bool skip_configuration;
+ uint32_t len;
+ const char *name;
} SaveState;
static SaveState savevm_state = {
.handlers = QTAILQ_HEAD_INITIALIZER(savevm_state.handlers),
.global_section_id = 0,
+ .skip_configuration = false,
+};
+
+void savevm_skip_configuration(void)
+{
+ savevm_state.skip_configuration = true;
+}
+
+
+static void configuration_pre_save(void *opaque)
+{
+ SaveState *state = opaque;
+ const char *current_name = MACHINE_GET_CLASS(current_machine)->name;
+
+ state->len = strlen(current_name);
+ state->name = current_name;
+}
+
+static int configuration_post_load(void *opaque, int version_id)
+{
+ SaveState *state = opaque;
+ const char *current_name = MACHINE_GET_CLASS(current_machine)->name;
+
+ if (strncmp(state->name, current_name, state->len) != 0) {
+ error_report("Machine type received is '%s' and local is '%s'",
+ state->name, current_name);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static const VMStateDescription vmstate_configuration = {
+ .name = "configuration",
+ .version_id = 1,
+ .post_load = configuration_post_load,
+ .pre_save = configuration_pre_save,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(len, SaveState),
+ VMSTATE_VBUFFER_ALLOC_UINT32(name, SaveState, 0, NULL, 0, len),
+ VMSTATE_END_OF_LIST()
+ },
};
static void dump_vmstate_vmsd(FILE *out_file,
QTAILQ_FOREACH_SAFE(se, &savevm_state.handlers, entry, new_se) {
if (strcmp(se->idstr, id) == 0 && se->opaque == opaque) {
QTAILQ_REMOVE(&savevm_state.handlers, se, entry);
- if (se->compat) {
- g_free(se->compat);
- }
+ g_free(se->compat);
g_free(se->ops);
g_free(se);
}
QTAILQ_FOREACH_SAFE(se, &savevm_state.handlers, entry, new_se) {
if (se->vmsd == vmsd && se->opaque == opaque) {
QTAILQ_REMOVE(&savevm_state.handlers, se, entry);
- if (se->compat) {
- g_free(se->compat);
- }
+ g_free(se->compat);
g_free(se);
}
}
}
}
-/*
- * Read a footer off the wire and check that it matches the expected section
- *
- * Returns: true if the footer was good
- * false if there is a problem (and calls error_report to say why)
- */
-static bool check_section_footer(QEMUFile *f, SaveStateEntry *se)
-{
- uint8_t read_mark;
- uint32_t read_section_id;
-
- if (skip_section_footers) {
- /* No footer to check */
- return true;
- }
-
- read_mark = qemu_get_byte(f);
-
- if (read_mark != QEMU_VM_SECTION_FOOTER) {
- error_report("Missing section footer for %s", se->idstr);
- return false;
- }
-
- read_section_id = qemu_get_be32(f);
- if (read_section_id != se->section_id) {
- error_report("Mismatched section id in footer for %s -"
- " read 0x%x expected 0x%x",
- se->idstr, read_section_id, se->section_id);
- return false;
- }
-
- /* All good */
- return true;
-}
-
bool qemu_savevm_state_blocked(Error **errp)
{
SaveStateEntry *se;
se->ops->set_params(params, se->opaque);
}
+ if (!savevm_state.skip_configuration) {
+ qemu_put_byte(f, QEMU_VM_CONFIGURATION);
+ vmstate_save_state(f, &vmstate_configuration, &savevm_state, 0);
+ }
+
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
if (!se->ops || !se->ops->save_live_setup) {
continue;
if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
continue;
}
+ if (se->vmsd && !vmstate_save_needed(se->vmsd, se->opaque)) {
+ trace_savevm_section_skip(se->idstr, se->section_id);
+ continue;
+ }
+
trace_savevm_section_start(se->idstr, se->section_id);
json_start_object(vmdesc, NULL);
if ((!se->ops || !se->ops->save_state) && !se->vmsd) {
continue;
}
+ if (se->vmsd && !vmstate_save_needed(se->vmsd, se->opaque)) {
+ continue;
+ }
save_section_header(f, se, QEMU_VM_SECTION_FULL);
int version_id;
};
+/*
+ * Read a footer off the wire and check that it matches the expected section
+ *
+ * Returns: true if the footer was good
+ * false if there is a problem (and calls error_report to say why)
+ */
+static bool check_section_footer(QEMUFile *f, LoadStateEntry *le)
+{
+ uint8_t read_mark;
+ uint32_t read_section_id;
+
+ if (skip_section_footers) {
+ /* No footer to check */
+ return true;
+ }
+
+ read_mark = qemu_get_byte(f);
+
+ if (read_mark != QEMU_VM_SECTION_FOOTER) {
+ error_report("Missing section footer for %s", le->se->idstr);
+ return false;
+ }
+
+ read_section_id = qemu_get_be32(f);
+ if (read_section_id != le->section_id) {
+ error_report("Mismatched section id in footer for %s -"
+ " read 0x%x expected 0x%x",
+ le->se->idstr, read_section_id, le->section_id);
+ return false;
+ }
+
+ /* All good */
+ return true;
+}
+
void loadvm_free_handlers(MigrationIncomingState *mis)
{
LoadStateEntry *le, *new_le;
return -ENOTSUP;
}
+ if (!savevm_state.skip_configuration) {
+ if (qemu_get_byte(f) != QEMU_VM_CONFIGURATION) {
+ error_report("Configuration section missing");
+ return -EINVAL;
+ }
+ ret = vmstate_load_state(f, &vmstate_configuration, &savevm_state, 0);
+
+ if (ret) {
+ return ret;
+ }
+ }
+
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
uint32_t instance_id, version_id, section_id;
SaveStateEntry *se;
" device '%s'", instance_id, idstr);
goto out;
}
- if (!check_section_footer(f, le->se)) {
+ if (!check_section_footer(f, le)) {
ret = -EINVAL;
goto out;
}
section_id, le->se->idstr);
goto out;
}
- if (!check_section_footer(f, le->se)) {
+ if (!check_section_footer(f, le)) {
ret = -EINVAL;
goto out;
}
* Try to read in the VMDESC section as well, so that dumping tools that
* intercept our migration stream have the chance to see it.
*/
- if (qemu_get_byte(f) == QEMU_VM_VMDESCRIPTION) {
- uint32_t size = qemu_get_be32(f);
- uint8_t *buf = g_malloc(0x1000);
-
- while (size > 0) {
- uint32_t read_chunk = MIN(size, 0x1000);
- qemu_get_buffer(f, buf, read_chunk);
- size -= read_chunk;
+
+ /* We've got to be careful; if we don't read the data and just shut the fd
+ * then the sender can error if we close while it's still sending.
+ * We also mustn't read data that isn't there; some transports (RDMA)
+ * will stall waiting for that data when the source has already closed.
+ */
+ if (should_send_vmdesc()) {
+ uint8_t *buf;
+ uint32_t size;
+ section_type = qemu_get_byte(f);
+
+ if (section_type != QEMU_VM_VMDESCRIPTION) {
+ error_report("Expected vmdescription section, but got %d",
+ section_type);
+ /*
+ * It doesn't seem worth failing at this point since
+ * we apparently have an otherwise valid VM state
+ */
+ } else {
+ buf = g_malloc(0x1000);
+ size = qemu_get_be32(f);
+
+ while (size > 0) {
+ uint32_t read_chunk = MIN(size, 0x1000);
+ qemu_get_buffer(f, buf, read_chunk);
+ size -= read_chunk;
+ }
+ g_free(buf);
}
- g_free(buf);
}
cpu_synchronize_all_post_init();
}
saved_vm_running = runstate_is_running();
+
+ ret = global_state_store();
+ if (ret) {
+ monitor_printf(mon, "Error saving global state\n");
+ return;
+ }
vm_stop(RUN_STATE_SAVE_VM);
memset(sn, 0, sizeof(*sn));
saved_vm_running = runstate_is_running();
vm_stop(RUN_STATE_SAVE_VM);
+ global_state_store_running();
f = qemu_fopen(filename, "wb");
if (!f) {
ret = qemu_save_device_state(f);
qemu_fclose(f);
if (ret < 0) {
- error_set(errp, QERR_IO_ERROR);
+ error_setg(errp, QERR_IO_ERROR);
}
the_end:
projects / qemu.git / blobdiff