/* * 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. * */ #ifndef QEMU_MIGRATION_H #define QEMU_MIGRATION_H #include "qapi/qmp/qdict.h" #include "qemu-common.h" #include "qemu/thread.h" #include "qemu/notify.h" #include "qapi/error.h" #include "migration/vmstate.h" #include "qapi-types.h" #include "exec/cpu-common.h" #define QEMU_VM_FILE_MAGIC 0x5145564d #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 #define QEMU_VM_FILE_VERSION 0x00000003 #define QEMU_VM_EOF 0x00 #define QEMU_VM_SECTION_START 0x01 #define QEMU_VM_SECTION_PART 0x02 #define QEMU_VM_SECTION_END 0x03 #define QEMU_VM_SECTION_FULL 0x04 #define QEMU_VM_SUBSECTION 0x05 #define QEMU_VM_VMDESCRIPTION 0x06 struct MigrationParams { bool blk; bool shared; }; typedef struct MigrationState MigrationState; struct MigrationState { int64_t bandwidth_limit; size_t bytes_xfer; size_t xfer_limit; QemuThread thread; QEMUBH *cleanup_bh; QEMUFile *file; int parameters[MIGRATION_PARAMETER_MAX]; int state; MigrationParams params; double mbps; int64_t total_time; int64_t downtime; int64_t expected_downtime; int64_t dirty_pages_rate; int64_t dirty_bytes_rate; bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; int64_t xbzrle_cache_size; int64_t setup_time; int64_t dirty_sync_count; }; void process_incoming_migration(QEMUFile *f); void qemu_start_incoming_migration(const char *uri, Error **errp); uint64_t migrate_max_downtime(void); void exec_start_incoming_migration(const char *host_port, Error **errp); void exec_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp); void tcp_start_incoming_migration(const char *host_port, Error **errp); void tcp_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp); void unix_start_incoming_migration(const char *path, Error **errp); void unix_start_outgoing_migration(MigrationState *s, const char *path, Error **errp); void fd_start_incoming_migration(const char *path, Error **errp); void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp); void rdma_start_outgoing_migration(void *opaque, const char *host_port, Error **errp); void rdma_start_incoming_migration(const char *host_port, Error **errp); void migrate_fd_error(MigrationState *s); void migrate_fd_connect(MigrationState *s); int migrate_fd_close(MigrationState *s); void add_migration_state_change_notifier(Notifier *notify); void remove_migration_state_change_notifier(Notifier *notify); bool migration_in_setup(MigrationState *); bool migration_has_finished(MigrationState *); bool migration_has_failed(MigrationState *); MigrationState *migrate_get_current(void); void migrate_compress_threads_create(void); void migrate_compress_threads_join(void); void migrate_decompress_threads_create(void); void migrate_decompress_threads_join(void); uint64_t ram_bytes_remaining(void); uint64_t ram_bytes_transferred(void); uint64_t ram_bytes_total(void); void free_xbzrle_decoded_buf(void); void acct_update_position(QEMUFile *f, size_t size, bool zero); uint64_t dup_mig_bytes_transferred(void); uint64_t dup_mig_pages_transferred(void); uint64_t skipped_mig_bytes_transferred(void); uint64_t skipped_mig_pages_transferred(void); uint64_t norm_mig_bytes_transferred(void); uint64_t norm_mig_pages_transferred(void); uint64_t xbzrle_mig_bytes_transferred(void); uint64_t xbzrle_mig_pages_transferred(void); uint64_t xbzrle_mig_pages_overflow(void); uint64_t xbzrle_mig_pages_cache_miss(void); double xbzrle_mig_cache_miss_rate(void); void ram_handle_compressed(void *host, uint8_t ch, uint64_t size); /** * @migrate_add_blocker - prevent migration from proceeding * * @reason - an error to be returned whenever migration is attempted */ void migrate_add_blocker(Error *reason); /** * @migrate_del_blocker - remove a blocking error from migration * * @reason - the error blocking migration */ void migrate_del_blocker(Error *reason); bool migrate_zero_blocks(void); bool migrate_auto_converge(void); int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen, uint8_t *dst, int dlen); int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen); int migrate_use_xbzrle(void); int64_t migrate_xbzrle_cache_size(void); int64_t xbzrle_cache_resize(int64_t new_size); bool migrate_use_compression(void); int migrate_compress_level(void); int migrate_compress_threads(void); int migrate_decompress_threads(void); void ram_control_before_iterate(QEMUFile *f, uint64_t flags); void ram_control_after_iterate(QEMUFile *f, uint64_t flags); void ram_control_load_hook(QEMUFile *f, uint64_t flags); /* Whenever this is found in the data stream, the flags * will be passed to ram_control_load_hook in the incoming-migration * side. This lets before_ram_iterate/after_ram_iterate add * transport-specific sections to the RAM migration data. */ #define RAM_SAVE_FLAG_HOOK 0x80 #define RAM_SAVE_CONTROL_NOT_SUPP -1000 #define RAM_SAVE_CONTROL_DELAYED -2000 size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset, ram_addr_t offset, size_t size, uint64_t *bytes_sent); #endif