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 */
pi_next(struct part_iter * iter)107 static inline int pi_next(struct part_iter *iter)
108 {
109 return iter->type->next(iter);
110 }
111
pi_dtor(struct part_iter * iter)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