#define QEMU_MIGRATION_H
#include "qemu-common.h"
+#include "qapi/qapi-types-migration.h"
#include "qemu/thread.h"
-#include "qapi-types.h"
#include "exec/cpu-common.h"
#include "qemu/coroutine_int.h"
#include "hw/qdev.h"
+#include "io/channel.h"
+
+struct PostcopyBlocktimeContext;
+
+#define MIGRATION_RESUME_ACK_VALUE (1)
/* State for the incoming migration */
struct MigrationIncomingState {
bool have_fault_thread;
QemuThread fault_thread;
QemuSemaphore fault_thread_sem;
+ /* Set this when we want the fault thread to quit */
+ bool fault_thread_quit;
bool have_listen_thread;
QemuThread listen_thread;
/* For the kernel to send us notifications */
int userfault_fd;
- /* To tell the fault_thread to quit */
- int userfault_quit_fd;
+ /* To notify the fault_thread to wake, e.g., when need to quit */
+ int userfault_event_fd;
QEMUFile *to_src_file;
QemuMutex rp_mutex; /* We send replies from multiple threads */
+ /* RAMBlock of last request sent to source */
+ RAMBlock *last_rb;
void *postcopy_tmp_page;
void *postcopy_tmp_zero_page;
+ /* PostCopyFD's for external userfaultfds & handlers of shared memory */
+ GArray *postcopy_remote_fds;
QEMUBH *bh;
/* The coroutine we should enter (back) after failover */
Coroutine *migration_incoming_co;
QemuSemaphore colo_incoming_sem;
+
+ /*
+ * PostcopyBlocktimeContext to keep information for postcopy
+ * live migration, to calculate vCPU block time
+ * */
+ struct PostcopyBlocktimeContext *blocktime_ctx;
+
+ /* notify PAUSED postcopy incoming migrations to try to continue */
+ bool postcopy_recover_triggered;
+ QemuSemaphore postcopy_pause_sem_dst;
+ QemuSemaphore postcopy_pause_sem_fault;
};
MigrationIncomingState *migration_incoming_get_current(void);
void migration_incoming_state_destroy(void);
+/*
+ * Functions to work with blocktime context
+ */
+void fill_destination_postcopy_migration_info(MigrationInfo *info);
#define TYPE_MIGRATION "migration"
QemuThread thread;
QEMUBH *cleanup_bh;
QEMUFile *to_dst_file;
+ /*
+ * Protects to_dst_file pointer. We need to make sure we won't
+ * yield or hang during the critical section, since this lock will
+ * be used in OOB command handler.
+ */
+ QemuMutex qemu_file_lock;
+
+ /*
+ * Used to allow urgent requests to override rate limiting.
+ */
+ QemuSemaphore rate_limit_sem;
+
+ /* bytes already send at the beggining of current interation */
+ uint64_t iteration_initial_bytes;
+ /* time at the start of current iteration */
+ int64_t iteration_start_time;
+ /*
+ * The final stage happens when the remaining data is smaller than
+ * this threshold; it's calculated from the requested downtime and
+ * measured bandwidth
+ */
+ int64_t threshold_size;
/* params from 'migrate-set-parameters' */
MigrationParameters parameters;
QEMUFile *from_dst_file;
QemuThread rp_thread;
bool error;
+ QemuSemaphore rp_sem;
} rp_state;
double mbps;
+ /* Timestamp when recent migration starts (ms) */
+ int64_t start_time;
+ /* Total time used by latest migration (ms) */
int64_t total_time;
+ /* Timestamp when VM is down (ms) to migrate the last stuff */
+ int64_t downtime_start;
int64_t downtime;
int64_t expected_downtime;
bool enabled_capabilities[MIGRATION_CAPABILITY__MAX];
- int64_t xbzrle_cache_size;
int64_t setup_time;
+ /*
+ * Whether guest was running when we enter the completion stage.
+ * If migration is interrupted by any reason, we need to continue
+ * running the guest on source.
+ */
+ bool vm_was_running;
/* Flag set once the migration has been asked to enter postcopy */
bool start_postcopy;
/* Flag set once the migration thread called bdrv_inactivate_all */
bool block_inactive;
+ /* Migration is paused due to pause-before-switchover */
+ QemuSemaphore pause_sem;
+
/* The semaphore is used to notify COLO thread that failover is finished */
QemuSemaphore colo_exit_sem;
int64_t colo_checkpoint_time;
QEMUTimer *colo_delay_timer;
- /* The last error that occurred */
+ /* The first error that has occurred.
+ We used the mutex to be able to return the 1st error message */
Error *error;
+ /* mutex to protect errp */
+ QemuMutex error_mutex;
+
/* Do we have to clean up -b/-i from old migrate parameters */
/* This feature is deprecated and will be removed */
bool must_remove_block_options;
bool send_configuration;
/* Whether we send section footer during migration */
bool send_section_footer;
+
+ /* Needed by postcopy-pause state */
+ QemuSemaphore postcopy_pause_sem;
+ QemuSemaphore postcopy_pause_rp_sem;
+ /*
+ * Whether we abort the migration if decompression errors are
+ * detected at the destination. It is left at false for qemu
+ * older than 3.0, since only newer qemu sends streams that
+ * do not trigger spurious decompression errors.
+ */
+ bool decompress_error_check;
};
void migrate_set_state(int *state, int old_state, int new_state);
void migration_fd_process_incoming(QEMUFile *f);
+void migration_ioc_process_incoming(QIOChannel *ioc);
+void migration_incoming_process(void);
+
+bool migration_has_all_channels(void);
uint64_t migrate_max_downtime(void);
+void migrate_set_error(MigrationState *s, const Error *error);
void migrate_fd_error(MigrationState *s, const Error *error);
-void migrate_fd_connect(MigrationState *s);
+void migrate_fd_connect(MigrationState *s, Error *error_in);
-MigrationState *migrate_init(void);
+void migrate_init(MigrationState *s);
bool migration_is_blocked(Error **errp);
/* True if outgoing migration has entered postcopy phase */
bool migration_in_postcopy(void);
MigrationState *migrate_get_current(void);
+bool migrate_postcopy(void);
+
bool migrate_release_ram(void);
bool migrate_postcopy_ram(void);
bool migrate_zero_blocks(void);
+bool migrate_dirty_bitmaps(void);
bool migrate_auto_converge(void);
+bool migrate_use_multifd(void);
+bool migrate_pause_before_switchover(void);
+int migrate_multifd_channels(void);
+int migrate_multifd_page_count(void);
int migrate_use_xbzrle(void);
int64_t migrate_xbzrle_cache_size(void);
int migrate_compress_threads(void);
int migrate_decompress_threads(void);
bool migrate_use_events(void);
+bool migrate_postcopy_blocktime(void);
/* Sending on the return path - generic and then for each message type */
void migrate_send_rp_shut(MigrationIncomingState *mis,
uint32_t value);
void migrate_send_rp_pong(MigrationIncomingState *mis,
uint32_t value);
-void migrate_send_rp_req_pages(MigrationIncomingState *mis, const char* rbname,
+int migrate_send_rp_req_pages(MigrationIncomingState *mis, const char* rbname,
ram_addr_t start, size_t len);
+void migrate_send_rp_recv_bitmap(MigrationIncomingState *mis,
+ char *block_name);
+void migrate_send_rp_resume_ack(MigrationIncomingState *mis, uint32_t value);
+
+void dirty_bitmap_mig_before_vm_start(void);
+void init_dirty_bitmap_incoming_migration(void);
+
+#define qemu_ram_foreach_block \
+ #warning "Use qemu_ram_foreach_block_migratable in migration code"
+
+void migration_make_urgent_request(void);
+void migration_consume_urgent_request(void);
#endif
projects / qemu.git / blobdiff