13d16814d2
This section would be sent:
a- for all new machine types
b- for old machine types if section state is different form {running,paused}
that were the only giving us troubles.
So, in new qemus: it is alwasy there. In old qemus: they are only
there if it an error has happened, basically stoping on target.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
203 lines
6.0 KiB
C
203 lines
6.0 KiB
C
/*
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* QEMU live migration
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*
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* Copyright IBM, Corp. 2008
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef QEMU_MIGRATION_H
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#define QEMU_MIGRATION_H
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#include "qapi/qmp/qdict.h"
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#include "qemu-common.h"
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#include "qemu/thread.h"
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#include "qemu/notify.h"
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#include "qapi/error.h"
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#include "migration/vmstate.h"
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#include "qapi-types.h"
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#include "exec/cpu-common.h"
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#define QEMU_VM_FILE_MAGIC 0x5145564d
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#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
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#define QEMU_VM_FILE_VERSION 0x00000003
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#define QEMU_VM_EOF 0x00
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#define QEMU_VM_SECTION_START 0x01
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#define QEMU_VM_SECTION_PART 0x02
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#define QEMU_VM_SECTION_END 0x03
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#define QEMU_VM_SECTION_FULL 0x04
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#define QEMU_VM_SUBSECTION 0x05
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#define QEMU_VM_VMDESCRIPTION 0x06
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#define QEMU_VM_SECTION_FOOTER 0x7e
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struct MigrationParams {
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bool blk;
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bool shared;
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};
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typedef struct MigrationState MigrationState;
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typedef QLIST_HEAD(, LoadStateEntry) LoadStateEntry_Head;
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/* State for the incoming migration */
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struct MigrationIncomingState {
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QEMUFile *file;
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/* See savevm.c */
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LoadStateEntry_Head loadvm_handlers;
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};
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MigrationIncomingState *migration_incoming_get_current(void);
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MigrationIncomingState *migration_incoming_state_new(QEMUFile *f);
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void migration_incoming_state_destroy(void);
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struct MigrationState
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{
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int64_t bandwidth_limit;
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size_t bytes_xfer;
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size_t xfer_limit;
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QemuThread thread;
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QEMUBH *cleanup_bh;
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QEMUFile *file;
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int parameters[MIGRATION_PARAMETER_MAX];
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int state;
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MigrationParams params;
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double mbps;
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int64_t total_time;
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int64_t downtime;
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int64_t expected_downtime;
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int64_t dirty_pages_rate;
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int64_t dirty_bytes_rate;
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bool enabled_capabilities[MIGRATION_CAPABILITY_MAX];
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int64_t xbzrle_cache_size;
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int64_t setup_time;
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int64_t dirty_sync_count;
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};
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void process_incoming_migration(QEMUFile *f);
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void qemu_start_incoming_migration(const char *uri, Error **errp);
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uint64_t migrate_max_downtime(void);
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void exec_start_incoming_migration(const char *host_port, Error **errp);
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void exec_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp);
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void tcp_start_incoming_migration(const char *host_port, Error **errp);
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void tcp_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp);
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void unix_start_incoming_migration(const char *path, Error **errp);
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void unix_start_outgoing_migration(MigrationState *s, const char *path, Error **errp);
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void fd_start_incoming_migration(const char *path, Error **errp);
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void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp);
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void rdma_start_outgoing_migration(void *opaque, const char *host_port, Error **errp);
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void rdma_start_incoming_migration(const char *host_port, Error **errp);
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void migrate_fd_error(MigrationState *s);
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void migrate_fd_connect(MigrationState *s);
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int migrate_fd_close(MigrationState *s);
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void add_migration_state_change_notifier(Notifier *notify);
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void remove_migration_state_change_notifier(Notifier *notify);
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bool migration_in_setup(MigrationState *);
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bool migration_has_finished(MigrationState *);
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bool migration_has_failed(MigrationState *);
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MigrationState *migrate_get_current(void);
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void migrate_compress_threads_create(void);
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void migrate_compress_threads_join(void);
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void migrate_decompress_threads_create(void);
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void migrate_decompress_threads_join(void);
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uint64_t ram_bytes_remaining(void);
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uint64_t ram_bytes_transferred(void);
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uint64_t ram_bytes_total(void);
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void free_xbzrle_decoded_buf(void);
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void acct_update_position(QEMUFile *f, size_t size, bool zero);
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uint64_t dup_mig_bytes_transferred(void);
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uint64_t dup_mig_pages_transferred(void);
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uint64_t skipped_mig_bytes_transferred(void);
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uint64_t skipped_mig_pages_transferred(void);
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uint64_t norm_mig_bytes_transferred(void);
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uint64_t norm_mig_pages_transferred(void);
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uint64_t xbzrle_mig_bytes_transferred(void);
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uint64_t xbzrle_mig_pages_transferred(void);
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uint64_t xbzrle_mig_pages_overflow(void);
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uint64_t xbzrle_mig_pages_cache_miss(void);
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double xbzrle_mig_cache_miss_rate(void);
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void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
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/**
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* @migrate_add_blocker - prevent migration from proceeding
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*
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* @reason - an error to be returned whenever migration is attempted
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*/
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void migrate_add_blocker(Error *reason);
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/**
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* @migrate_del_blocker - remove a blocking error from migration
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*
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* @reason - the error blocking migration
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*/
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void migrate_del_blocker(Error *reason);
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bool migrate_zero_blocks(void);
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bool migrate_auto_converge(void);
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int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen,
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uint8_t *dst, int dlen);
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int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen);
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int migrate_use_xbzrle(void);
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int64_t migrate_xbzrle_cache_size(void);
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int64_t xbzrle_cache_resize(int64_t new_size);
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bool migrate_use_compression(void);
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int migrate_compress_level(void);
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int migrate_compress_threads(void);
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int migrate_decompress_threads(void);
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void ram_control_before_iterate(QEMUFile *f, uint64_t flags);
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void ram_control_after_iterate(QEMUFile *f, uint64_t flags);
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void ram_control_load_hook(QEMUFile *f, uint64_t flags, void *data);
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/* Whenever this is found in the data stream, the flags
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* will be passed to ram_control_load_hook in the incoming-migration
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* side. This lets before_ram_iterate/after_ram_iterate add
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* transport-specific sections to the RAM migration data.
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*/
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#define RAM_SAVE_FLAG_HOOK 0x80
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#define RAM_SAVE_CONTROL_NOT_SUPP -1000
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#define RAM_SAVE_CONTROL_DELAYED -2000
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size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset,
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ram_addr_t offset, size_t size,
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uint64_t *bytes_sent);
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void ram_mig_init(void);
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void savevm_skip_section_footers(void);
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void register_global_state(void);
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void global_state_set_optional(void);
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#endif
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