LXR qemu/migration/ram.h

   1/*
   2 * QEMU System Emulator
   3 *
   4 * Copyright (c) 2003-2008 Fabrice Bellard
   5 * Copyright (c) 2011-2015 Red Hat Inc
   6 *
   7 * Authors:
   8 *  Juan Quintela <quintela@redhat.com>
   9 *
  10 * Permission is hereby granted, free of charge, to any person obtaining a copy
  11 * of this software and associated documentation files (the "Software"), to deal
  12 * in the Software without restriction, including without limitation the rights
  13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14 * copies of the Software, and to permit persons to whom the Software is
  15 * furnished to do so, subject to the following conditions:
  16 *
  17 * The above copyright notice and this permission notice shall be included in
  18 * all copies or substantial portions of the Software.
  19 *
  20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  26 * THE SOFTWARE.
  27 */
  28
  29#ifndef QEMU_MIGRATION_RAM_H
  30#define QEMU_MIGRATION_RAM_H
  31
  32#include "qapi/qapi-types-migration.h"
  33#include "exec/cpu-common.h"
  34#include "io/channel.h"
  35
  36extern MigrationStats ram_counters;
  37extern XBZRLECacheStats xbzrle_counters;
  38extern CompressionStats compression_counters;
  39
  40bool ramblock_is_ignored(RAMBlock *block);
  41/* Should be holding either ram_list.mutex, or the RCU lock. */
  42#define RAMBLOCK_FOREACH_NOT_IGNORED(block)            \
  43    INTERNAL_RAMBLOCK_FOREACH(block)                   \
  44        if (ramblock_is_ignored(block)) {} else
  45
  46#define RAMBLOCK_FOREACH_MIGRATABLE(block)             \
  47    INTERNAL_RAMBLOCK_FOREACH(block)                   \
  48        if (!qemu_ram_is_migratable(block)) {} else
  49
  50int xbzrle_cache_resize(uint64_t new_size, Error **errp);
  51uint64_t ram_bytes_remaining(void);
  52uint64_t ram_bytes_total(void);
  53void mig_throttle_counter_reset(void);
  54
  55uint64_t ram_pagesize_summary(void);
  56int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len);
  57void acct_update_position(QEMUFile *f, size_t size, bool zero);
  58void ram_postcopy_migrated_memory_release(MigrationState *ms);
  59/* For outgoing discard bitmap */
  60void ram_postcopy_send_discard_bitmap(MigrationState *ms);
  61/* For incoming postcopy discard */
  62int ram_discard_range(const char *block_name, uint64_t start, size_t length);
  63int ram_postcopy_incoming_init(MigrationIncomingState *mis);
  64int ram_load_postcopy(QEMUFile *f, int channel);
  65
  66void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
  67
  68int ramblock_recv_bitmap_test(RAMBlock *rb, void *host_addr);
  69bool ramblock_recv_bitmap_test_byte_offset(RAMBlock *rb, uint64_t byte_offset);
  70void ramblock_recv_bitmap_set(RAMBlock *rb, void *host_addr);
  71void ramblock_recv_bitmap_set_range(RAMBlock *rb, void *host_addr, size_t nr);
  72int64_t ramblock_recv_bitmap_send(QEMUFile *file,
  73                                  const char *block_name);
  74int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb);
  75bool ramblock_page_is_discarded(RAMBlock *rb, ram_addr_t start);
  76void postcopy_preempt_shutdown_file(MigrationState *s);
  77void *postcopy_preempt_thread(void *opaque);
  78
  79/* ram cache */
  80int colo_init_ram_cache(void);
  81void colo_flush_ram_cache(void);
  82void colo_release_ram_cache(void);
  83void colo_incoming_start_dirty_log(void);
  84
  85/* Background snapshot */
  86bool ram_write_tracking_available(void);
  87bool ram_write_tracking_compatible(void);
  88void ram_write_tracking_prepare(void);
  89int ram_write_tracking_start(void);
  90void ram_write_tracking_stop(void);
  91
  92void dirty_sync_missed_zero_copy(void);
  93
  94#endif
  95