[qemu.git] / migration / ram.h

/*
 * QEMU System Emulator
 *
 * Copyright (c) 2003-2008 Fabrice Bellard
 * Copyright (c) 2011-2015 Red Hat Inc
 *
 * Authors:
 *  Juan Quintela <[email protected]>
 *
 * 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"

extern MigrationStats ram_counters;
extern XBZRLECacheStats xbzrle_counters;
extern CompressionStats compression_counters;

int xbzrle_cache_resize(int64_t new_size, Error **errp);
uint64_t ram_bytes_remaining(void);
uint64_t ram_bytes_total(void);

int multifd_save_setup(void);
void multifd_save_cleanup(void);
int multifd_load_setup(void);
int multifd_load_cleanup(Error **errp);
bool multifd_recv_all_channels_created(void);
bool multifd_recv_new_channel(QIOChannel *ioc, Error **errp);

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_debug_dump_bitmap(unsigned long *todump, bool expected,
                           unsigned long pages);
void ram_postcopy_migrated_memory_release(MigrationState *ms);
/* For outgoing discard bitmap */
int 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);

void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);

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);

/* ram cache */
int colo_init_ram_cache(void);
void colo_release_ram_cache(void);

#endif
Commit	Line	Data
7b1e1a22 JQ	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 <[email protected]>
	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
9af23989	32	#include "qapi/qapi-types-migration.h"
7b1e1a22	33	#include "exec/cpu-common.h"
71bb07db	34	#include "io/channel.h"
7b1e1a22	35
9360447d JQ	36	extern MigrationStats ram_counters;
9360447d JQ	37	extern XBZRLECacheStats xbzrle_counters;
76e03000	38	extern CompressionStats compression_counters;
9360447d	39
c9dede2d	40	int xbzrle_cache_resize(int64_t new_size, Error **errp);
7b1e1a22	41	uint64_t ram_bytes_remaining(void);
7b1e1a22 JQ	42	uint64_t ram_bytes_total(void);
7b1e1a22 JQ	43
f986c3d2	44	int multifd_save_setup(void);
1398b2e3	45	void multifd_save_cleanup(void);
f986c3d2 JQ	46	int multifd_load_setup(void);
f986c3d2 JQ	47	int multifd_load_cleanup(Error **errp);
62c1e0ca	48	bool multifd_recv_all_channels_created(void);
49ed0d24	49	bool multifd_recv_new_channel(QIOChannel ioc, Error *errp);
f986c3d2	50
7b1e1a22	51	uint64_t ram_pagesize_summary(void);
7b1e1a22 JQ	52	int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len);
7b1e1a22 JQ	53	void acct_update_position(QEMUFile *f, size_t size, bool zero);
7b1e1a22 JQ	54	void ram_debug_dump_bitmap(unsigned long *todump, bool expected,
	55	unsigned long pages);
	56	void ram_postcopy_migrated_memory_release(MigrationState *ms);
	57	/* For outgoing discard bitmap */
	58	int ram_postcopy_send_discard_bitmap(MigrationState *ms);
	59	/* For incoming postcopy discard */
	60	int ram_discard_range(const char *block_name, uint64_t start, size_t length);
	61	int ram_postcopy_incoming_init(MigrationIncomingState *mis);
	62
	63	void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
f9494614 AP	64
f9494614 AP	65	int ramblock_recv_bitmap_test(RAMBlock rb, void host_addr);
1cba9f6e	66	bool ramblock_recv_bitmap_test_byte_offset(RAMBlock *rb, uint64_t byte_offset);
f9494614 AP	67	void ramblock_recv_bitmap_set(RAMBlock rb, void host_addr);
f9494614 AP	68	void ramblock_recv_bitmap_set_range(RAMBlock rb, void host_addr, size_t nr);
a335debb PX	69	int64_t ramblock_recv_bitmap_send(QEMUFile *file,
	70	const char *block_name);
	71	int ram_dirty_bitmap_reload(MigrationState s, RAMBlock rb);
f9494614	72
13af18f2 ZC	73	/* ram cache */
	74	int colo_init_ram_cache(void);
	75	void colo_release_ram_cache(void);
	76
7b1e1a22	77	#endif