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/*
Copyright (C) 2012 Red Hat, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _H_MIGRATION_PROTOCOL
#define _H_MIGRATION_PROTOCOL
#include <spice/vd_agent.h>
#include "glz-encoder-dict.h"
/* ************************************************
* src-server to dst-server migration data messages
* ************************************************/
/* increase the version when the version of any
* of the migration data messages is increased */
#define SPICE_MIGRATION_PROTOCOL_VERSION 1
typedef struct __attribute__ ((__packed__)) SpiceMigrateDataHeader {
uint32_t magic;
uint32_t version;
} SpiceMigrateDataHeader;
/* ********************
* Char device base
* *******************/
/* increase the version of descendent char devices when this
* version is increased */
#define SPICE_MIGRATE_DATA_CHAR_DEVICE_VERSION 1
/* Should be the first field of any of the char_devices migration data (see write_data_ptr) */
typedef struct __attribute__ ((__packed__)) SpiceMigrateDataCharDevice {
uint32_t version;
uint8_t connected;
uint32_t num_client_tokens;
uint32_t num_send_tokens;
uint32_t write_size; /* write to dev */
uint32_t write_num_client_tokens; /* how many messages from the client are part of the write_data */
uint32_t write_data_ptr; /* offset from
SpiceMigrateDataCharDevice - sizeof(SpiceMigrateDataHeader) */
} SpiceMigrateDataCharDevice;
/* ********
* spicevmc
* ********/
#define SPICE_MIGRATE_DATA_SPICEVMC_VERSION 1 /* NOTE: increase version when CHAR_DEVICE_VERSION
is increased */
#define SPICE_MIGRATE_DATA_SPICEVMC_MAGIC (*(uint32_t *)"SVMD")
typedef struct __attribute__ ((__packed__)) SpiceMigrateDataSpiceVmc {
SpiceMigrateDataCharDevice base;
} SpiceMigrateDataSpiceVmc;
/* *********
* smartcard
* *********/
#define SPICE_MIGRATE_DATA_SMARTCARD_VERSION 1 /* NOTE: increase version when CHAR_DEVICE_VERSION
is increased */
#define SPICE_MIGRATE_DATA_SMARTCARD_MAGIC (*(uint32_t *)"SCMD")
typedef struct __attribute__ ((__packed__)) SpiceMigrateDataSmartcard {
SpiceMigrateDataCharDevice base;
uint8_t reader_added;
uint32_t read_size; /* partial data read from dev */
uint32_t read_data_ptr;
} SpiceMigrateDataSmartcard;
/* *********************************
* main channel (mainly guest agent)
* *********************************/
#define SPICE_MIGRATE_DATA_MAIN_VERSION 1 /* NOTE: increase version when CHAR_DEVICE_VERSION
is increased */
#define SPICE_MIGRATE_DATA_MAIN_MAGIC (*(uint32_t *)"MNMD")
typedef struct __attribute__ ((__packed__)) SpiceMigrateDataMain {
SpiceMigrateDataCharDevice agent_base;
uint8_t client_agent_started; /* for discarding messages */
struct __attribute__ ((__packed__)) {
/* partial data read from device. Such data is stored only
* if the chunk header or the entire msg header haven't yet been read completely.
* Once the headers are read, partial reads of chunks can be sent as
* smaller chunks to the client, without the roundtrip overhead of migration data */
uint32_t chunk_header_size;
VDIChunkHeader chunk_header;
uint8_t msg_header_done;
uint32_t msg_header_partial_len;
uint32_t msg_header_ptr;
uint32_t msg_remaining;
uint8_t msg_filter_result;
} agent2client;
struct __attribute__ ((__packed__)) {
uint32_t msg_remaining;
uint8_t msg_filter_result;
} client2agent;
} SpiceMigrateDataMain;
/* ****************
* display channel
* ***************/
#define SPICE_MIGRATE_DATA_DISPLAY_VERSION 1
#define SPICE_MIGRATE_DATA_DISPLAY_MAGIC (*(uint32_t *)"DCMD")
/*
* TODO: store the cache and dictionary data only in one channel (the
* freezer).
* TODO: optimizations: don't send surfaces information if it will be faster
* to resend the surfaces on-demand.
* */
#define MIGRATE_DATA_DISPLAY_MAX_CACHE_CLIENTS 4
typedef struct __attribute__ ((__packed__)) SpiceMigrateDataDisplay {
uint64_t message_serial;
uint8_t low_bandwidth_setting;
/*
* Synchronizing the shared pixmap cache.
* For now, the cache is not migrated, and instead, we reset it and send
* SPICE_MSG_DISPLAY_INVAL_ALL_PIXMAPS to the client.
* In order to keep the client and server caches consistent:
* The channel which freezed the cache on the src side, unfreezes it
* on the dest side, and increases its generation (see 'reset' in red_client_shared_cach.h).
* In order to enforce that images that are added to the cache by other channels
* will reach the client only after SPICE_MSG_DISPLAY_INVAL_ALL_PIXMAPS,
* we send SPICE_MSG_WAIT_FOR_CHANNELS
* (see the generation mismatch handling in 'add' in red_client_shared_cach.h).
*/
uint8_t pixmap_cache_id;
int64_t pixmap_cache_size;
uint8_t pixmap_cache_freezer;
uint64_t pixmap_cache_clients[MIGRATE_DATA_DISPLAY_MAX_CACHE_CLIENTS];
uint8_t glz_dict_id;
GlzEncDictRestoreData glz_dict_data;
uint32_t surfaces_at_client_ptr; /* reference to MigrateDisplaySurfacesAtClientLossless/Lossy.
Lossy: when jpeg-wan-compression(qemu cmd line)=always
or when jpeg-wan-compression=auto,
and low_bandwidth_setting=TRUE */
} SpiceMigrateDataDisplay;
typedef struct __attribute__ ((__packed__)) SpiceMigrateDataRect {
int32_t left;
int32_t top;
int32_t right;
int32_t bottom;
} SpiceMigrateDataRect;
typedef struct __attribute__ ((__packed__)) MigrateDisplaySurfaceLossless {
uint32_t id;
} MigrateDisplaySurfaceLossless;
typedef struct __attribute__ ((__packed__)) MigrateDisplaySurfaceLossy {
uint32_t id;
SpiceMigrateDataRect lossy_rect;
} MigrateDisplaySurfaceLossy;
typedef struct __attribute__ ((__packed__)) MigrateDisplaySurfacesAtClientLossless {
uint32_t num_surfaces;
MigrateDisplaySurfaceLossless surfaces[0];
} MigrateDisplaySurfacesAtClientLossless;
typedef struct __attribute__ ((__packed__)) MigrateDisplaySurfacesAtClientLossy {
uint32_t num_surfaces;
MigrateDisplaySurfaceLossy surfaces[0];
} MigrateDisplaySurfacesAtClientLossy;
/* ****************
* inputs channel
* ***************/
#define SPICE_MIGRATE_DATA_INPUTS_VERSION 1
#define SPICE_MIGRATE_DATA_INPUTS_MAGIC (*(uint32_t *)"ICMD")
typedef struct __attribute__ ((__packed__)) SpiceMigrateDataInputs {
uint16_t motion_count;
} SpiceMigrateDataInputs;
static inline int migration_protocol_validate_header(SpiceMigrateDataHeader *header,
uint32_t magic,
uint32_t version)
{
if (header->magic != magic) {
spice_error("bad magic %u (!= %u)", header->magic, magic);
return FALSE;
}
if (header->version > version) {
spice_error("unsupported version %u (> %u)", header->version, version);
return FALSE;
}
return TRUE;
}
#endif
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