/* * QEMU System Emulator * * Copyright (c) 2003-2008 Fabrice Bellard * Copyright (c) 2011-2015 Red Hat Inc * * Authors: * Juan Quintela <quintela@redhat.com> * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #ifndef QEMU_MIGRATION_RAM_H #define QEMU_MIGRATION_RAM_H #include "qapi/qapi-types-migration.h" #include "exec/cpu-common.h" #include "io/channel.h" #include "qemu/stats64.h" /* * These are the migration statistic counters that need to be updated using * atomic ops (can be accessed by more than one thread). Here since we * cannot modify MigrationStats directly to use Stat64 as it was defined in * the QAPI scheme, we define an internal structure to hold them, and we * propagate the real values when QMP queries happen. * * IOW, the corresponding fields within ram_counters on these specific * fields will be always zero and not being used at all; they're just * placeholders to make it QAPI-compatible. */ typedef struct { Stat64 transferred; Stat64 duplicate; Stat64 normal; Stat64 postcopy_bytes; } MigrationAtomicStats; extern MigrationAtomicStats ram_atomic_counters; extern MigrationStats ram_counters; extern XBZRLECacheStats xbzrle_counters; extern CompressionStats compression_counters; bool ramblock_is_ignored(RAMBlock *block); /* Should be holding either ram_list.mutex, or the RCU lock. */ #define RAMBLOCK_FOREACH_NOT_IGNORED(block) \ INTERNAL_RAMBLOCK_FOREACH(block) \ if (ramblock_is_ignored(block)) {} else #define RAMBLOCK_FOREACH_MIGRATABLE(block) \ INTERNAL_RAMBLOCK_FOREACH(block) \ if (!qemu_ram_is_migratable(block)) {} else int xbzrle_cache_resize(uint64_t new_size, Error **errp); uint64_t ram_bytes_remaining(void); uint64_t ram_bytes_total(void); void mig_throttle_counter_reset(void); uint64_t ram_pagesize_summary(void); int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len); void acct_update_position(QEMUFile *f, size_t size, bool zero); void ram_postcopy_migrated_memory_release(MigrationState *ms); /* For outgoing discard bitmap */ void ram_postcopy_send_discard_bitmap(MigrationState *ms); /* For incoming postcopy discard */ int ram_discard_range(const char *block_name, uint64_t start, size_t length); int ram_postcopy_incoming_init(MigrationIncomingState *mis); int ram_load_postcopy(QEMUFile *f, int channel); void ram_handle_compressed(void *host, uint8_t ch, uint64_t size); void ram_transferred_add(uint64_t bytes); void ram_release_page(const char *rbname, uint64_t offset); int ramblock_recv_bitmap_test(RAMBlock *rb, void *host_addr); bool ramblock_recv_bitmap_test_byte_offset(RAMBlock *rb, uint64_t byte_offset); void ramblock_recv_bitmap_set(RAMBlock *rb, void *host_addr); void ramblock_recv_bitmap_set_range(RAMBlock *rb, void *host_addr, size_t nr); int64_t ramblock_recv_bitmap_send(QEMUFile *file, const char *block_name); int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb); bool ramblock_page_is_discarded(RAMBlock *rb, ram_addr_t start); void postcopy_preempt_shutdown_file(MigrationState *s); void *postcopy_preempt_thread(void *opaque); /* ram cache */ int colo_init_ram_cache(void); void colo_flush_ram_cache(void); void colo_release_ram_cache(void); void colo_incoming_start_dirty_log(void); /* Background snapshot */ bool ram_write_tracking_available(void); bool ram_write_tracking_compatible(void); void ram_write_tracking_prepare(void); int ram_write_tracking_start(void); void ram_write_tracking_stop(void); void dirty_sync_missed_zero_copy(void); #endif