diff options
Diffstat (limited to 'migration-tcp-android.c')
| -rw-r--r-- | migration-tcp-android.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/migration-tcp-android.c b/migration-tcp-android.c new file mode 100644 index 0000000..51e1b78 --- /dev/null +++ b/migration-tcp-android.c @@ -0,0 +1,197 @@ +/* + * 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 "qemu_socket.h" +#include "migration.h" +#include "qemu-char.h" +#include "sysemu.h" +#include "buffered_file.h" +#include "block.h" + +//#define DEBUG_MIGRATION_TCP + +#ifdef DEBUG_MIGRATION_TCP +#define dprintf(fmt, ...) \ + do { printf("migration-tcp: " fmt, ## __VA_ARGS__); } while (0) +#else +#define dprintf(fmt, ...) \ + do { } while (0) +#endif + +static int socket_errno(FdMigrationState *s) +{ + return errno; +} + +static int socket_write(FdMigrationState *s, const void * buf, size_t size) +{ + return socket_send(s->fd, buf, size); +} + +static int tcp_close(FdMigrationState *s) +{ + dprintf("tcp_close\n"); + if (s->fd != -1) { + socket_close(s->fd); + s->fd = -1; + } + return 0; +} + + +static void tcp_wait_for_connect(void *opaque) +{ + FdMigrationState *s = opaque; + int ret; + + dprintf("connect completed\n"); + ret = socket_get_error(s->fd); + if (ret < 0) { + dprintf("error connecting %d\n", val); + migrate_fd_error(s); + return; + } + + qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); + + migrate_fd_connect(s); +} + +MigrationState *tcp_start_outgoing_migration(const char *host_port, + int64_t bandwidth_limit, + int detach) +{ + SockAddress addr; + FdMigrationState *s; + int ret; + + if (parse_host_port(&addr, host_port) < 0) + return NULL; + + s = qemu_mallocz(sizeof(*s)); + + s->get_error = socket_errno; + s->write = socket_write; + s->close = tcp_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; + s->fd = socket_create_inet(SOCKET_STREAM); + if (s->fd == -1) { + qemu_free(s); + return NULL; + } + + socket_set_nonblock(s->fd); + + if (!detach) + migrate_fd_monitor_suspend(s); + + do { + ret = socket_connect(s->fd, &addr); + if (ret == -1) + ret = -(s->get_error(s)); + + if (ret == -EINPROGRESS || ret == -EWOULDBLOCK) + qemu_set_fd_handler2(s->fd, NULL, NULL, tcp_wait_for_connect, s); + } while (ret == -EINTR); + + if (ret < 0 && ret != -EINPROGRESS && ret != -EWOULDBLOCK) { + dprintf("connect failed\n"); + socket_close(s->fd); + qemu_free(s); + return NULL; + } else if (ret >= 0) + migrate_fd_connect(s); + + return &s->mig_state; +} + +static void tcp_accept_incoming_migration(void *opaque) +{ + SockAddress addr; + int s = (unsigned long)opaque; + QEMUFile *f; + int c, ret; + + c = socket_accept(s, &addr); + dprintf("accepted migration\n"); + + if (c == -1) { + fprintf(stderr, "could not accept migration connection\n"); + return; + } + + f = qemu_fopen_socket(c); + if (f == NULL) { + fprintf(stderr, "could not qemu_fopen socket\n"); + goto out; + } + + vm_stop(0); /* just in case */ + 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); + socket_close(s); + + vm_start(); + +out_fopen: + qemu_fclose(f); +out: + socket_close(c); +} + +int tcp_start_incoming_migration(const char *host_port) +{ + SockAddress addr; + int s; + + if (parse_host_port(&addr, host_port) < 0) { + fprintf(stderr, "invalid host/port combination: %s\n", host_port); + return -EINVAL; + } + + s = socket_create_inet(SOCKET_STREAM); + if (s == -1) + return -socket_error(); + + socket_set_xreuseaddr(s); + + if (socket_bind(s, &addr) == -1) + goto err; + + if (socket_listen(s, 1) == -1) + goto err; + + qemu_set_fd_handler2(s, NULL, tcp_accept_incoming_migration, NULL, + (void *)(unsigned long)s); + + return 0; + +err: + socket_close(s); + return -socket_error(); +} |