1 /* 2 * QEMU System Emulator 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #ifndef MIGRATION_QEMU_FILE_H 26 #define MIGRATION_QEMU_FILE_H 27 28 #include <zlib.h> 29 #include "exec/cpu-common.h" 30 #include "io/channel.h" 31 32 QEMUFile *qemu_file_new_input(QIOChannel *ioc); 33 QEMUFile *qemu_file_new_output(QIOChannel *ioc); 34 int qemu_fclose(QEMUFile *f); 35 36 /* 37 * qemu_file_transferred: 38 * 39 * Report the total number of bytes transferred with 40 * this file. 41 * 42 * For writable files, any pending buffers will be 43 * flushed, so the reported value will be equal to 44 * the number of bytes transferred on the wire. 45 * 46 * For readable files, the reported value will be 47 * equal to the number of bytes transferred on the 48 * wire. 49 * 50 * Returns: the total bytes transferred 51 */ 52 uint64_t qemu_file_transferred(QEMUFile *f); 53 54 /* 55 * qemu_file_transferred_noflush: 56 * 57 * As qemu_file_transferred except for writable files, where no flush 58 * is performed and the reported amount will include the size of any 59 * queued buffers, on top of the amount actually transferred. 60 * 61 * Returns: the total bytes transferred and queued 62 */ 63 uint64_t qemu_file_transferred_noflush(QEMUFile *f); 64 65 /* 66 * put_buffer without copying the buffer. 67 * The buffer should be available till it is sent asynchronously. 68 */ 69 void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, size_t size, 70 bool may_free); 71 72 #include "migration/qemu-file-types.h" 73 74 size_t coroutine_mixed_fn qemu_peek_buffer(QEMUFile *f, uint8_t **buf, size_t size, size_t offset); 75 size_t coroutine_mixed_fn qemu_get_buffer_in_place(QEMUFile *f, uint8_t **buf, size_t size); 76 ssize_t qemu_put_compression_data(QEMUFile *f, z_stream *stream, 77 const uint8_t *p, size_t size); 78 int qemu_put_qemu_file(QEMUFile *f_des, QEMUFile *f_src); 79 bool qemu_file_buffer_empty(QEMUFile *file); 80 81 /* 82 * Note that you can only peek continuous bytes from where the current pointer 83 * is; you aren't guaranteed to be able to peak to +n bytes unless you've 84 * previously peeked +n-1. 85 */ 86 int coroutine_mixed_fn qemu_peek_byte(QEMUFile *f, int offset); 87 void qemu_file_skip(QEMUFile *f, int size); 88 int qemu_file_get_error_obj_any(QEMUFile *f1, QEMUFile *f2, Error **errp); 89 void qemu_file_set_error_obj(QEMUFile *f, int ret, Error *err); 90 void qemu_file_set_error(QEMUFile *f, int ret); 91 int qemu_file_shutdown(QEMUFile *f); 92 QEMUFile *qemu_file_get_return_path(QEMUFile *f); 93 void qemu_fflush(QEMUFile *f); 94 void qemu_file_set_blocking(QEMUFile *f, bool block); 95 int qemu_file_get_to_fd(QEMUFile *f, int fd, size_t size); 96 97 QIOChannel *qemu_file_get_ioc(QEMUFile *file); 98 99 #endif 100