migration.h 3.2 KB

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  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. #ifndef QEMU_MIGRATION_H
  14. #define QEMU_MIGRATION_H
  15. #include "qdict.h"
  16. #include "qemu-common.h"
  17. #include "notify.h"
  18. #include "error.h"
  19. #include "vmstate.h"
  20. #include "qapi-types.h"
  21. struct MigrationParams {
  22. bool blk;
  23. bool shared;
  24. };
  25. typedef struct MigrationState MigrationState;
  26. struct MigrationState
  27. {
  28. int64_t bandwidth_limit;
  29. QEMUFile *file;
  30. int fd;
  31. int state;
  32. int (*get_error)(MigrationState *s);
  33. int (*close)(MigrationState *s);
  34. int (*write)(MigrationState *s, const void *buff, size_t size);
  35. void *opaque;
  36. MigrationParams params;
  37. int64_t total_time;
  38. bool enabled_capabilities[MIGRATION_CAPABILITY_MAX];
  39. int64_t xbzrle_cache_size;
  40. };
  41. void process_incoming_migration(QEMUFile *f);
  42. int qemu_start_incoming_migration(const char *uri, Error **errp);
  43. uint64_t migrate_max_downtime(void);
  44. void do_info_migrate_print(Monitor *mon, const QObject *data);
  45. void do_info_migrate(Monitor *mon, QObject **ret_data);
  46. int exec_start_incoming_migration(const char *host_port);
  47. int exec_start_outgoing_migration(MigrationState *s, const char *host_port);
  48. int tcp_start_incoming_migration(const char *host_port, Error **errp);
  49. int tcp_start_outgoing_migration(MigrationState *s, const char *host_port,
  50. Error **errp);
  51. int unix_start_incoming_migration(const char *path);
  52. int unix_start_outgoing_migration(MigrationState *s, const char *path);
  53. int fd_start_incoming_migration(const char *path);
  54. int fd_start_outgoing_migration(MigrationState *s, const char *fdname);
  55. void migrate_fd_error(MigrationState *s);
  56. void migrate_fd_connect(MigrationState *s);
  57. void add_migration_state_change_notifier(Notifier *notify);
  58. void remove_migration_state_change_notifier(Notifier *notify);
  59. bool migration_is_active(MigrationState *);
  60. bool migration_has_finished(MigrationState *);
  61. bool migration_has_failed(MigrationState *);
  62. uint64_t ram_bytes_remaining(void);
  63. uint64_t ram_bytes_transferred(void);
  64. uint64_t ram_bytes_total(void);
  65. extern SaveVMHandlers savevm_ram_handlers;
  66. uint64_t dup_mig_bytes_transferred(void);
  67. uint64_t dup_mig_pages_transferred(void);
  68. uint64_t norm_mig_bytes_transferred(void);
  69. uint64_t norm_mig_pages_transferred(void);
  70. uint64_t xbzrle_mig_bytes_transferred(void);
  71. uint64_t xbzrle_mig_pages_transferred(void);
  72. uint64_t xbzrle_mig_pages_overflow(void);
  73. uint64_t xbzrle_mig_pages_cache_miss(void);
  74. /**
  75. * @migrate_add_blocker - prevent migration from proceeding
  76. *
  77. * @reason - an error to be returned whenever migration is attempted
  78. */
  79. void migrate_add_blocker(Error *reason);
  80. /**
  81. * @migrate_del_blocker - remove a blocking error from migration
  82. *
  83. * @reason - the error blocking migration
  84. */
  85. void migrate_del_blocker(Error *reason);
  86. int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen,
  87. uint8_t *dst, int dlen);
  88. int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen);
  89. int migrate_use_xbzrle(void);
  90. int64_t migrate_xbzrle_cache_size(void);
  91. int64_t xbzrle_cache_resize(int64_t new_size);
  92. #endif