1 /* ----------------------------------------------------------------------- * 2 * 3 * Copyright 2003-2009 H. Peter Anvin - All Rights Reserved 4 * Copyright 2009-2010 Intel Corporation; author: H. Peter Anvin 5 * Copyright 2010 Shao Miller 6 * Copyright 2010-2012 Michal Soltys 7 * 8 * Permission is hereby granted, free of charge, to any person 9 * obtaining a copy of this software and associated documentation 10 * files (the "Software"), to deal in the Software without 11 * restriction, including without limitation the rights to use, 12 * copy, modify, merge, publish, distribute, sublicense, and/or 13 * sell copies of the Software, and to permit persons to whom 14 * the Software is furnished to do so, subject to the following 15 * conditions: 16 * 17 * The above copyright notice and this permission notice shall 18 * be included in all copies or substantial portions of the Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 22 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 23 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 24 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 25 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 26 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 27 * OTHER DEALINGS IN THE SOFTWARE. 28 * 29 * ----------------------------------------------------------------------- */ 30 31 /* 32 * partiter.h 33 * 34 * Provides disk / partition iteration. 35 */ 36 37 #ifndef COM32_CHAIN_PARTITER_H 38 #define COM32_CHAIN_PARTITER_H 39 40 #include <stdint.h> 41 #include <syslinux/disk.h> 42 43 /* status */ 44 45 enum {PI_ERRLOAD = -31, PI_INSANE, PI_OK = 0, PI_DONE}; 46 47 /* flags */ 48 49 enum {PIF_STEPALL = 1, PIF_PREFMBR = 2, PIF_STRICT = 4, PIF_STRICTER = 8}; 50 51 struct itertype; 52 struct part_iter; 53 54 struct itertype { 55 void (*dtor)(struct part_iter *); 56 int (*next)(struct part_iter *); 57 }; 58 59 #define PI_GPTLABSIZE ((int)sizeof(((struct disk_gpt_part_entry *)0)->name)) 60 61 struct part_iter { 62 const struct itertype *type; 63 char *data; 64 char *record; 65 uint64_t abs_lba; 66 uint64_t length; 67 int index0; /* including holes, from -1 (disk, then parts from 0) */ 68 int index; /* excluding holes, from 0 (disk, then parts from 1), -1 means hole, if PIF_STEPALL is set */ 69 int flags; /* flags, see #defines above */ 70 int status; /* current status, see enums above */ 71 struct disk_info di; 72 union { 73 struct { 74 uint32_t disk_sig; /* 32bit disk signature as stored in MBR */ 75 76 uint32_t bebr_lba; /* absolute lba of base extended partition */ 77 uint32_t bebr_siz; /* size of base extended partition */ 78 79 uint32_t cebr_lba; /* absolute lba of curr ext. partition */ 80 uint32_t cebr_siz; /* size of curr ext. partition */ 81 uint32_t nebr_lba; /* absolute lba of next ext. partition */ 82 uint32_t nebr_siz; /* size of next ext. partition */ 83 84 int bebr_index0; /* index of (0-3) of base ext. part., -1 if not present in MBR */ 85 int logskipcnt; /* how many logical holes were skipped */ 86 } dos; 87 struct { 88 struct guid disk_guid; 89 struct guid part_guid; 90 char part_label[PI_GPTLABSIZE/2+1]; 91 int pe_count; 92 int pe_size; 93 uint64_t ufirst; 94 uint64_t ulast; 95 } gpt; 96 }; 97 }; 98 99 extern const struct itertype * const typedos; 100 extern const struct itertype * const typegpt; 101 extern const struct itertype * const typeraw; 102 103 struct part_iter *pi_begin(const struct disk_info *, int flags); 104 void pi_del(struct part_iter **); 105 106 /* inline virtuals */ 107 static inline int pi_next(struct part_iter *iter) 108 { 109 return iter->type->next(iter); 110 } 111 112 static inline void pi_dtor(struct part_iter *iter) 113 { 114 iter->type->dtor(iter); 115 } 116 117 #endif 118 119 /* vim: set ts=8 sts=4 sw=4 noet: */ 120
