/* * 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. * * Contributions after 2012-01-13 are licensed under the terms of the * GNU GPL, version 2 or (at your option) any later version. */ #include "qemu-common.h" #include "qemu/main-loop.h" #include "qemu/sockets.h" #include "migration/migration.h" #include "monitor/monitor.h" #include "migration/qemu-file.h" #include "block/block.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 void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp) { int fd = monitor_get_fd(cur_mon, fdname, errp); if (fd == -1) { return; } s->file = qemu_fdopen(fd, "wb"); migrate_fd_connect(s); } static void fd_accept_incoming_migration(void *opaque) { QEMUFile *f = opaque; qemu_set_fd_handler2(qemu_get_fd(f), NULL, NULL, NULL, NULL); process_incoming_migration(f); } void fd_start_incoming_migration(const char *infd, Error **errp) { int fd; QEMUFile *f; DPRINTF("Attempting to start an incoming migration via fd\n"); fd = strtol(infd, NULL, 0); f = qemu_fdopen(fd, "rb"); if(f == NULL) { error_setg_errno(errp, errno, "failed to open the source descriptor"); return; } qemu_set_fd_handler2(fd, NULL, fd_accept_incoming_migration, NULL, f); }