migration.h

   1 /*
   2  * QEMU live migration
   3  *
   4  * Copyright IBM, Corp. 2008
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #ifndef QEMU_MIGRATION_H
  15 #define QEMU_MIGRATION_H
  16
  17 #include "qdict.h"
  18 #include "qemu-common.h"
  19
  20 #define MIG_STATE_ERROR         -1
  21 #define MIG_STATE_COMPLETED     0
  22 #define MIG_STATE_CANCELLED     1
  23 #define MIG_STATE_ACTIVE        2
  24
  25 typedef struct MigrationState MigrationState;
  26
  27 struct MigrationState
  28 {
  29     /* FIXME: add more accessors to print migration info */
  30     void (*cancel)(MigrationState *s);
  31     int (*get_status)(MigrationState *s);
  32     void (*release)(MigrationState *s);
  33     int blk;
  34     int shared;
  35 };
  36
  37 typedef struct FdMigrationState FdMigrationState;
  38
  39 struct FdMigrationState
  40 {
  41     MigrationState mig_state;
  42     int64_t bandwidth_limit;
  43     QEMUFile *file;
  44     int fd;
  45     Monitor *mon;
  46     int state;
  47     int (*get_error)(struct FdMigrationState*);
  48     int (*close)(struct FdMigrationState*);
  49     int (*write)(struct FdMigrationState*, const void *, size_t);
  50     void *opaque;
  51 };
  52
  53 void qemu_start_incoming_migration(const char *uri);
  54
  55 void do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data);
  56
  57 void do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data);
  58
  59 void do_migrate_set_speed(Monitor *mon, const QDict *qdict);
  60
  61 uint64_t migrate_max_downtime(void);
  62
  63 void do_migrate_set_downtime(Monitor *mon, const QDict *qdict);
  64
  65 void do_info_migrate_print(Monitor *mon, const QObject *data);
  66
  67 void do_info_migrate(Monitor *mon, QObject **ret_data);
  68
  69 int exec_start_incoming_migration(const char *host_port);
  70
  71 MigrationState *exec_start_outgoing_migration(Monitor *mon,
  72                                               const char *host_port,
  73                                               int64_t bandwidth_limit,
  74                                               int detach,
  75                                               int blk,
  76                                               int inc);
  77
  78 int tcp_start_incoming_migration(const char *host_port);
  79
  80 MigrationState *tcp_start_outgoing_migration(Monitor *mon,
  81                                              const char *host_port,
  82                                              int64_t bandwidth_limit,
  83                                              int detach,
  84                                              int blk,
  85                                              int inc);
  86
  87 int unix_start_incoming_migration(const char *path);
  88
  89 MigrationState *unix_start_outgoing_migration(Monitor *mon,
  90                                               const char *path,
  91                                               int64_t bandwidth_limit,
  92                                               int detach,
  93                                               int blk,
  94                                               int inc);
  95
  96 int fd_start_incoming_migration(const char *path);
  97
  98 MigrationState *fd_start_outgoing_migration(Monitor *mon,
  99                                             const char *fdname,
 100                                             int64_t bandwidth_limit,
 101                                             int detach,
 102                                             int blk,
 103                                             int inc);
 104
 105 void migrate_fd_monitor_suspend(FdMigrationState *s, Monitor *mon);
 106
 107 void migrate_fd_error(FdMigrationState *s);
 108
 109 void migrate_fd_cleanup(FdMigrationState *s);
 110
 111 void migrate_fd_put_notify(void *opaque);
 112
 113 ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size);
 114
 115 void migrate_fd_connect(FdMigrationState *s);
 116
 117 void migrate_fd_put_ready(void *opaque);
 118
 119 int migrate_fd_get_status(MigrationState *mig_state);
 120
 121 void migrate_fd_cancel(MigrationState *mig_state);
 122
 123 void migrate_fd_release(MigrationState *mig_state);
 124
 125 void migrate_fd_wait_for_unfreeze(void *opaque);
 126
 127 int migrate_fd_close(void *opaque);
 128
 129 static inline FdMigrationState *migrate_to_fms(MigrationState *mig_state)
 130 {
 131     return container_of(mig_state, FdMigrationState, mig_state);
 132 }
 133
 134 #endif