diff options
Diffstat (limited to 'migration/multifd.h')
| -rw-r--r-- | migration/multifd.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/migration/multifd.h b/migration/multifd.h index d8b0205977..448a03d89a 100644 --- a/migration/multifd.h +++ b/migration/multifd.h @@ -23,8 +23,16 @@ void multifd_recv_sync_main(void); void multifd_send_sync_main(QEMUFile *f); int multifd_queue_page(QEMUFile *f, RAMBlock *block, ram_addr_t offset); +/* Multifd Compression flags */ #define MULTIFD_FLAG_SYNC (1 << 0) +/* We reserve 3 bits for compression methods */ +#define MULTIFD_FLAG_COMPRESSION_MASK (7 << 1) +/* we need to be compatible. Before compression value was 0 */ +#define MULTIFD_FLAG_NOCOMP (0 << 1) +#define MULTIFD_FLAG_ZLIB (1 << 1) +#define MULTIFD_FLAG_ZSTD (2 << 1) + /* This value needs to be a multiple of qemu_target_page_size() */ #define MULTIFD_PACKET_SIZE (512 * 1024) @@ -96,6 +104,8 @@ typedef struct { uint64_t num_pages; /* syncs main thread and channels */ QemuSemaphore sem_sync; + /* used for compression methods */ + void *data; } MultiFDSendParams; typedef struct { @@ -133,7 +143,28 @@ typedef struct { uint64_t num_pages; /* syncs main thread and channels */ QemuSemaphore sem_sync; + /* used for de-compression methods */ + void *data; } MultiFDRecvParams; +typedef struct { + /* Setup for sending side */ + int (*send_setup)(MultiFDSendParams *p, Error **errp); + /* Cleanup for sending side */ + void (*send_cleanup)(MultiFDSendParams *p, Error **errp); + /* Prepare the send packet */ + int (*send_prepare)(MultiFDSendParams *p, uint32_t used, Error **errp); + /* Write the send packet */ + int (*send_write)(MultiFDSendParams *p, uint32_t used, Error **errp); + /* Setup for receiving side */ + int (*recv_setup)(MultiFDRecvParams *p, Error **errp); + /* Cleanup for receiving side */ + void (*recv_cleanup)(MultiFDRecvParams *p); + /* Read all pages */ + int (*recv_pages)(MultiFDRecvParams *p, uint32_t used, Error **errp); +} MultiFDMethods; + +void multifd_register_ops(int method, MultiFDMethods *ops); + #endif |