--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/qemu-symbian-svp/migration.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,281 @@
+/*
+ * QEMU live migration
+ *
+ * Copyright IBM, Corp. 2008
+ *
+ * Authors:
+ * Anthony Liguori <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu-common.h"
+#include "migration.h"
+#include "console.h"
+#include "buffered_file.h"
+#include "sysemu.h"
+#include "block.h"
+#include "qemu_socket.h"
+
+//#define DEBUG_MIGRATION
+
+#ifdef DEBUG_MIGRATION
+#define dprintf(fmt, ...) \
+ do { printf("migration: " fmt, ## __VA_ARGS__); } while (0)
+#else
+#define dprintf(fmt, ...) \
+ do { } while (0)
+#endif
+
+/* Migration speed throttling */
+static uint32_t max_throttle = (32 << 20);
+
+static MigrationState *current_migration;
+
+void qemu_start_incoming_migration(const char *uri)
+{
+ const char *p;
+
+ if (strstart(uri, "tcp:", &p))
+ tcp_start_incoming_migration(p);
+#if !defined(WIN32)
+ else if (strstart(uri, "exec:", &p))
+ exec_start_incoming_migration(p);
+#endif
+ else
+ fprintf(stderr, "unknown migration protocol: %s\n", uri);
+}
+
+void do_migrate(int detach, const char *uri)
+{
+ MigrationState *s = NULL;
+ const char *p;
+
+ if (strstart(uri, "tcp:", &p))
+ s = tcp_start_outgoing_migration(p, max_throttle, detach);
+#if !defined(WIN32)
+ else if (strstart(uri, "exec:", &p))
+ s = exec_start_outgoing_migration(p, max_throttle, detach);
+#endif
+ else
+ term_printf("unknown migration protocol: %s\n", uri);
+
+ if (s == NULL)
+ term_printf("migration failed\n");
+ else {
+ if (current_migration)
+ current_migration->release(current_migration);
+
+ current_migration = s;
+ }
+}
+
+void do_migrate_cancel(void)
+{
+ MigrationState *s = current_migration;
+
+ if (s)
+ s->cancel(s);
+}
+
+void do_migrate_set_speed(const char *value)
+{
+ double d;
+ char *ptr;
+
+ d = strtod(value, &ptr);
+ switch (*ptr) {
+ case 'G': case 'g':
+ d *= 1024;
+ case 'M': case 'm':
+ d *= 1024;
+ case 'K': case 'k':
+ d *= 1024;
+ default:
+ break;
+ }
+
+ max_throttle = (uint32_t)d;
+}
+
+void do_info_migrate(void)
+{
+ MigrationState *s = current_migration;
+
+ if (s) {
+ term_printf("Migration status: ");
+ switch (s->get_status(s)) {
+ case MIG_STATE_ACTIVE:
+ term_printf("active\n");
+ break;
+ case MIG_STATE_COMPLETED:
+ term_printf("completed\n");
+ break;
+ case MIG_STATE_ERROR:
+ term_printf("failed\n");
+ break;
+ case MIG_STATE_CANCELLED:
+ term_printf("cancelled\n");
+ break;
+ }
+ }
+}
+
+/* shared migration helpers */
+
+void migrate_fd_error(FdMigrationState *s)
+{
+ dprintf("setting error state\n");
+ s->state = MIG_STATE_ERROR;
+ migrate_fd_cleanup(s);
+}
+
+void migrate_fd_cleanup(FdMigrationState *s)
+{
+ qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
+
+ if (s->file) {
+ dprintf("closing file\n");
+ qemu_fclose(s->file);
+ }
+
+ if (s->fd != -1)
+ close(s->fd);
+
+ /* Don't resume monitor until we've flushed all of the buffers */
+ if (s->detach == 2) {
+ monitor_resume();
+ s->detach = 0;
+ }
+
+ s->fd = -1;
+}
+
+void migrate_fd_put_notify(void *opaque)
+{
+ FdMigrationState *s = opaque;
+
+ qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
+ qemu_file_put_notify(s->file);
+}
+
+ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size)
+{
+ FdMigrationState *s = opaque;
+ ssize_t ret;
+
+ do {
+ ret = s->write(s, data, size);
+ } while (ret == -1 && ((s->get_error(s)) == EINTR || (s->get_error(s)) == EWOULDBLOCK));
+
+ if (ret == -1)
+ ret = -(s->get_error(s));
+
+ if (ret == -EAGAIN)
+ qemu_set_fd_handler2(s->fd, NULL, NULL, migrate_fd_put_notify, s);
+
+ return ret;
+}
+
+void migrate_fd_connect(FdMigrationState *s)
+{
+ int ret;
+
+ s->file = qemu_fopen_ops_buffered(s,
+ s->bandwidth_limit,
+ migrate_fd_put_buffer,
+ migrate_fd_put_ready,
+ migrate_fd_wait_for_unfreeze,
+ migrate_fd_close);
+
+ dprintf("beginning savevm\n");
+ ret = qemu_savevm_state_begin(s->file);
+ if (ret < 0) {
+ dprintf("failed, %d\n", ret);
+ migrate_fd_error(s);
+ return;
+ }
+
+ migrate_fd_put_ready(s);
+}
+
+void migrate_fd_put_ready(void *opaque)
+{
+ FdMigrationState *s = opaque;
+
+ if (s->state != MIG_STATE_ACTIVE) {
+ dprintf("put_ready returning because of non-active state\n");
+ return;
+ }
+
+ dprintf("iterate\n");
+ if (qemu_savevm_state_iterate(s->file) == 1) {
+ dprintf("done iterating\n");
+ vm_stop(0);
+
+ bdrv_flush_all();
+ qemu_savevm_state_complete(s->file);
+ s->state = MIG_STATE_COMPLETED;
+ migrate_fd_cleanup(s);
+ }
+}
+
+int migrate_fd_get_status(MigrationState *mig_state)
+{
+ FdMigrationState *s = migrate_to_fms(mig_state);
+ return s->state;
+}
+
+void migrate_fd_cancel(MigrationState *mig_state)
+{
+ FdMigrationState *s = migrate_to_fms(mig_state);
+
+ if (s->state != MIG_STATE_ACTIVE)
+ return;
+
+ dprintf("cancelling migration\n");
+
+ s->state = MIG_STATE_CANCELLED;
+
+ migrate_fd_cleanup(s);
+}
+
+void migrate_fd_release(MigrationState *mig_state)
+{
+ FdMigrationState *s = migrate_to_fms(mig_state);
+
+ dprintf("releasing state\n");
+
+ if (s->state == MIG_STATE_ACTIVE) {
+ s->state = MIG_STATE_CANCELLED;
+ migrate_fd_cleanup(s);
+ }
+ free(s);
+}
+
+void migrate_fd_wait_for_unfreeze(void *opaque)
+{
+ FdMigrationState *s = opaque;
+ int ret;
+
+ dprintf("wait for unfreeze\n");
+ if (s->state != MIG_STATE_ACTIVE)
+ return;
+
+ do {
+ fd_set wfds;
+
+ FD_ZERO(&wfds);
+ FD_SET(s->fd, &wfds);
+
+ ret = select(s->fd + 1, NULL, &wfds, NULL, NULL);
+ } while (ret == -1 && (s->get_error(s)) == EINTR);
+}
+
+int migrate_fd_close(void *opaque)
+{
+ FdMigrationState *s = opaque;
+ return s->close(s);
+}