1 /* Copyright (c) 2008, XenSource Inc. 2 * All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * * Redistributions of source code must retain the above copyright 7 * notice, this list of conditions and the following disclaimer. 8 * * Redistributions in binary form must reproduce the above copyright 9 * notice, this list of conditions and the following disclaimer in the 10 * documentation and/or other materials provided with the distribution. 11 * * Neither the name of XenSource Inc. nor the names of its contributors 12 * may be used to endorse or promote products derived from this software 13 * without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 19 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 23 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 24 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 #ifndef _VHD_JOURNAL_H_ 28 #define _VHD_JOURNAL_H_ 29 30 #include <inttypes.h> 31 32 #include "libvhd.h" 33 34 #define VHD_JOURNAL_METADATA 0x01 35 #define VHD_JOURNAL_DATA 0x02 36 37 #define VHD_JOURNAL_HEADER_COOKIE "vjournal" 38 #define VHD_JOURNAL_ENTRY_COOKIE 0xaaaa12344321aaaa 39 40 typedef struct vhd_journal_header { 41 char cookie[8]; 42 vhd_uuid_t uuid; 43 uint64_t vhd_footer_offset; 44 uint32_t journal_data_entries; 45 uint32_t journal_metadata_entries; 46 uint64_t journal_data_offset; 47 uint64_t journal_metadata_offset; 48 uint64_t journal_eof; 49 char pad[448]; 50 } vhd_journal_header_t; 51 52 typedef struct vhd_journal { 53 char *jname; 54 int jfd; 55 int is_block; /* is jfd a block device */ 56 vhd_journal_header_t header; 57 vhd_context_t vhd; 58 } vhd_journal_t; 59 60 int vhd_journal_create(vhd_journal_t *, const char *file, const char *jfile); 61 int vhd_journal_open(vhd_journal_t *, const char *file, const char *jfile); 62 int vhd_journal_add_block(vhd_journal_t *, uint32_t block, char mode); 63 int vhd_journal_commit(vhd_journal_t *); 64 int vhd_journal_revert(vhd_journal_t *); 65 int vhd_journal_close(vhd_journal_t *); 66 int vhd_journal_remove(vhd_journal_t *); 67 68 #endif 69