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_COMPRESS_H 30 #define QEMU_MIGRATION_COMPRESS_H 31 32 #include "qemu-file.h" 33 #include "qapi/qapi-types-migration.h" 34 35 enum CompressResult { 36 RES_NONE = 0, 37 RES_ZEROPAGE = 1, 38 RES_COMPRESS = 2 39 }; 40 typedef enum CompressResult CompressResult; 41 42 struct CompressParam { 43 bool done; 44 bool quit; 45 bool trigger; 46 CompressResult result; 47 QEMUFile *file; 48 QemuMutex mutex; 49 QemuCond cond; 50 RAMBlock *block; 51 ram_addr_t offset; 52 53 /* internally used fields */ 54 z_stream stream; 55 uint8_t *originbuf; 56 }; 57 typedef struct CompressParam CompressParam; 58 59 void compress_threads_save_cleanup(void); 60 int compress_threads_save_setup(void); 61 62 bool compress_page_with_multi_thread(RAMBlock *block, ram_addr_t offset, 63 int (send_queued_data(CompressParam *))); 64 65 int wait_for_decompress_done(void); 66 void compress_threads_load_cleanup(void); 67 int compress_threads_load_setup(QEMUFile *f); 68 void decompress_data_with_multi_threads(QEMUFile *f, void *host, int len); 69 70 void populate_compress(MigrationInfo *info); 71 uint64_t compress_ram_pages(void); 72 void update_compress_thread_counts(const CompressParam *param, int bytes_xmit); 73 void compress_update_rates(uint64_t page_count); 74 int compress_send_queued_data(CompressParam *param); 75 void compress_flush_data(void); 76 77 #endif 78