@@ -110,7 +110,7 @@ obj-$(CONFIG_BRLAPI) += baum.o
LIBS+=$(BRLAPI_LIBS)
obj-$(CONFIG_WIN32) += tap-win32.o
-obj-$(CONFIG_POSIX) += migration-exec.o
+obj-$(CONFIG_POSIX) += migration-exec.o migration-fd.o
ifdef CONFIG_COREAUDIO
AUDIO_PT = y
new file mode 100644
@@ -0,0 +1,146 @@
+/*
+ * QEMU live migration via generic fd
+ *
+ * Copyright Red Hat, Inc. 2009
+ *
+ * Authors:
+ * Chris Lalancette <clalance@redhat.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 "qemu_socket.h"
+#include "migration.h"
+#include "monitor.h"
+#include "qemu-char.h"
+#include "sysemu.h"
+#include "buffered_file.h"
+#include "block.h"
+#include "qemu_socket.h"
+
+//#define DEBUG_MIGRATION_FD
+
+#ifdef DEBUG_MIGRATION_FD
+#define dprintf(fmt, ...) \
+ do { printf("migration-fd: " fmt, ## __VA_ARGS__); } while (0)
+#else
+#define dprintf(fmt, ...) \
+ do { } while (0)
+#endif
+
+static int fd_errno(FdMigrationState *s)
+{
+ return errno;
+}
+
+static int fd_write(FdMigrationState *s, const void * buf, size_t size)
+{
+ return write(s->fd, buf, size);
+}
+
+static int fd_close(FdMigrationState *s)
+{
+ dprintf("fd_close\n");
+ if (s->fd != -1) {
+ close(s->fd);
+ s->fd = -1;
+ }
+ return 0;
+}
+
+MigrationState *fd_start_outgoing_migration(Monitor *mon,
+ const char *fdname,
+ int64_t bandwidth_limit,
+ int detach)
+{
+ FdMigrationState *s;
+
+ s = qemu_mallocz(sizeof(*s));
+
+ s->fd = monitor_get_fd(mon, fdname);
+ if (s->fd == -1) {
+ dprintf("fd_migration: no file descriptor supplied via SCM_RIGHTS\n");
+ qemu_free(s);
+ return NULL;
+ }
+
+ socket_set_nonblock(s->fd);
+
+ s->get_error = fd_errno;
+ s->write = fd_write;
+ s->close = fd_close;
+ s->mig_state.cancel = migrate_fd_cancel;
+ s->mig_state.get_status = migrate_fd_get_status;
+ s->mig_state.release = migrate_fd_release;
+
+ s->state = MIG_STATE_ACTIVE;
+ s->mon_resume = NULL;
+ s->bandwidth_limit = bandwidth_limit;
+
+ if (!detach)
+ migrate_fd_monitor_suspend(s);
+
+ migrate_fd_connect(s);
+
+ return &s->mig_state;
+}
+
+static void fd_accept_incoming_migration(void *opaque)
+{
+ struct sockaddr addr;
+ socklen_t addrlen = sizeof(addr);
+ int s = (unsigned long)opaque;
+ QEMUFile *f;
+ int c, ret;
+
+ do {
+ c = accept(s, &addr, &addrlen);
+ } while (c == -1 && socket_error() == EINTR);
+
+ if (c == -1) {
+ fprintf(stderr, "could not accept migration connection\n");
+ return;
+ }
+
+ dprintf("accepted migration\n");
+
+ f = qemu_fopen_socket(c);
+ if (f == NULL) {
+ fprintf(stderr, "could not qemu_fopen socket\n");
+ goto out;
+ }
+
+ ret = qemu_loadvm_state(f);
+ if (ret < 0) {
+ fprintf(stderr, "load of migration failed\n");
+ goto out_fopen;
+ }
+ qemu_announce_self();
+ dprintf("successfully loaded vm state\n");
+
+ /* we've successfully migrated, close the server socket */
+ qemu_set_fd_handler2(s, NULL, NULL, NULL, NULL);
+ close(s);
+
+out_fopen:
+ qemu_fclose(f);
+out:
+ close(c);
+}
+
+int fd_start_incoming_migration(const char *infd)
+{
+ int fd;
+
+ dprintf("Attempting to start an fd incoming migration\n");
+
+ fd = strtol(infd, NULL, 0);
+
+ qemu_set_fd_handler2(fd, NULL, fd_accept_incoming_migration, NULL,
+ (void *)(unsigned long)fd);
+
+ return 0;
+}
@@ -45,4 +45,6 @@ void qemu_start_incoming_migration(const char *uri)
exec_start_incoming_migration(p);
+ else if (strstart(uri, "fd:", &p))
+ fd_start_incoming_migration(p);
#endif
else
fprintf(stderr, "unknown migration protocol: %s\n", uri);
@@ -62,4 +64,6 @@ void do_migrate(Monitor *mon, int detach, const char *uri)
s = exec_start_outgoing_migration(p, max_throttle, detach);
+ else if (strstart(uri, "fd:", &p))
+ s = fd_start_outgoing_migration(mon, p, max_throttle, detach);
#endif
else
monitor_printf(mon, "unknown migration protocol: %s\n", uri);
@@ -79,6 +79,13 @@ MigrationState *unix_start_outgoing_migration(const char *path,
int64_t bandwidth_limit,
int detach);
+int fd_start_incoming_migration(const char *path);
+
+MigrationState *fd_start_outgoing_migration(Monitor *mon,
+ const char *fdname,
+ int64_t bandwidth_limit,
+ int detach);
+
void migrate_fd_monitor_suspend(FdMigrationState *s);
void migrate_fd_error(FdMigrationState *s);