X-Git-Url: http://git.maemo.org/git/?a=blobdiff_plain;f=migration.c;h=401383cf0aee45ca2e8505db5a160ea96a2053b8;hb=5cea8590eaa099be8087f363f80d0e6917382385;hp=684cbae898c72539339573ad1d50e79e44597b98;hpb=34c9dd8eea38e94d97e22ac12c2f2aaa0dca59d8;p=qemu diff --git a/migration.c b/migration.c index 684cbae..401383c 100644 --- a/migration.c +++ b/migration.c @@ -13,7 +13,21 @@ #include "qemu-common.h" #include "migration.h" -#include "console.h" +#include "monitor.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); @@ -26,78 +40,266 @@ void qemu_start_incoming_migration(const char *uri) 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) +void do_migrate(Monitor *mon, 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); + 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); + monitor_printf(mon, "unknown migration protocol: %s\n", uri); if (s == NULL) - term_printf("migration failed\n"); + monitor_printf(mon, "migration failed\n"); else { - if (current_migration) - current_migration->release(current_migration); + if (current_migration) + current_migration->release(current_migration); - current_migration = s; + current_migration = s; } } -void do_migrate_cancel(void) +void do_migrate_cancel(Monitor *mon) { MigrationState *s = current_migration; if (s) - s->cancel(s); + s->cancel(s); } -void do_migrate_set_speed(const char *value) +void do_migrate_set_speed(Monitor *mon, const char *value) { double d; char *ptr; + FdMigrationState *s; d = strtod(value, &ptr); switch (*ptr) { case 'G': case 'g': - d *= 1024; + d *= 1024; case 'M': case 'm': - d *= 1024; + d *= 1024; case 'K': case 'k': - d *= 1024; + d *= 1024; default: - break; + break; } max_throttle = (uint32_t)d; + s = migrate_to_fms(current_migration); + + if (s) { + qemu_file_set_rate_limit(s->file, max_throttle); + } + } -void do_info_migrate(void) +void do_info_migrate(Monitor *mon) { 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; - } + monitor_printf(mon, "Migration status: "); + switch (s->get_status(s)) { + case MIG_STATE_ACTIVE: + monitor_printf(mon, "active\n"); + monitor_printf(mon, "transferred ram: %" PRIu64 " kbytes\n", ram_bytes_transferred() >> 10); + monitor_printf(mon, "remaining ram: %" PRIu64 " kbytes\n", ram_bytes_remaining() >> 10); + monitor_printf(mon, "total ram: %" PRIu64 " kbytes\n", ram_bytes_total() >> 10); + break; + case MIG_STATE_COMPLETED: + monitor_printf(mon, "completed\n"); + break; + case MIG_STATE_ERROR: + monitor_printf(mon, "failed\n"); + break; + case MIG_STATE_CANCELLED: + monitor_printf(mon, "cancelled\n"); + break; + } + } +} + +/* shared migration helpers */ + +void migrate_fd_monitor_suspend(FdMigrationState *s) +{ + s->mon_resume = cur_mon; + if (monitor_suspend(cur_mon) == 0) + dprintf("suspending monitor\n"); + else + monitor_printf(cur_mon, "terminal does not allow synchronous " + "migration, continuing detached\n"); +} + +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->mon_resume) + monitor_resume(s->mon_resume); + + 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)); + + 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) { + int state; + dprintf("done iterating\n"); + vm_stop(0); + + bdrv_flush_all(); + if ((qemu_savevm_state_complete(s->file)) < 0) { + vm_start(); + state = MIG_STATE_ERROR; + } else { + state = MIG_STATE_COMPLETED; + } + migrate_fd_cleanup(s); + s->state = state; + } +} + +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); +}