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Diffstat (limited to 'include/migration/migration.h')
| -rw-r--r-- | include/migration/migration.h | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/include/migration/migration.h b/include/migration/migration.h new file mode 100644 index 00000000..83346210 --- /dev/null +++ b/include/migration/migration.h @@ -0,0 +1,207 @@ +/* + * 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 +#define QEMU_VM_CONFIGURATION 0x07 +#define QEMU_VM_SECTION_FOOTER 0x7e + +struct MigrationParams { + bool blk; + bool shared; +}; + +typedef struct MigrationState MigrationState; + +typedef QLIST_HEAD(, LoadStateEntry) LoadStateEntry_Head; + +/* State for the incoming migration */ +struct MigrationIncomingState { + QEMUFile *file; + + /* See savevm.c */ + LoadStateEntry_Head loadvm_handlers; +}; + +MigrationIncomingState *migration_incoming_get_current(void); +MigrationIncomingState *migration_incoming_state_new(QEMUFile *f); +void migration_incoming_state_destroy(void); + +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); +bool migrate_use_events(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, void *data); + +/* 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); + +void ram_mig_init(void); +void savevm_skip_section_footers(void); +void register_global_state(void); +void global_state_set_optional(void); +void savevm_skip_configuration(void); +int global_state_store(void); +void global_state_store_running(void); +#endif |