source: mainline/uspace/lib/gpt/libgpt.h@ 622a50b

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 622a50b was 622a50b, checked in by Dominik Taborsky (AT DOT) <brembyseznamcz>, 12 years ago

Jiri Svoboda credits
  • Property mode set to 100644
File size: 5.4 KB
Line 
1/*
2 * Copyright (c) 2011, 2012, 2013 Dominik Taborsky
3 * Copyright (c) 2009 Jiri Svoboda (for some definitions from uspace/srv/bd/part/guid_part)
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * - Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * - The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30/** @addtogroup libgpt
31 * @{
32 */
33/** @file
34 */
35
36#ifndef __GPT_H__
37#define __GPT_H__
38
39#define LIBGPT_NAME "libgpt"
40
41#include <loc.h>
42#include <sys/types.h>
43
44/** Block address of GPT header. */
45#define GPT_HDR_BA 1
46/** Block size of GPT header. */
47#define GPT_HDR_BS 1
48/** Minimum number of GPT partition entries */
49#define GPT_MIN_PART_NUM 128
50/** Basic number of GPT partition entries */
51#define GPT_BASE_PART_NUM (GPT_MIN_PART_NUM)
52/** How much fill we ignore before resizing partition array */
53#define GPT_IGNORE_FILL_NUM 10
54
55/** GPT header signature ("EFI PART" in ASCII) */
56extern const uint8_t efi_signature[8];
57
58typedef enum {
59 AT_REQ_PART = 0,
60 AT_NO_BLOCK_IO,
61 AT_LEGACY_BOOT,
62 AT_UNDEFINED,
63 AT_SPECIFIC = 48
64} GPT_ATTR;
65
66/** GPT header
67 * - all in little endian.
68 */
69typedef struct {
70 uint8_t efi_signature[8];
71 uint32_t revision;
72 uint32_t header_size;
73 uint32_t header_crc32;
74 uint32_t reserved;
75 uint64_t my_lba;
76 uint64_t alternate_lba;
77 uint64_t first_usable_lba;
78 uint64_t last_usable_lba;
79 uint8_t disk_guid[16];
80 uint64_t entry_lba;
81 uint32_t fillries;
82 uint32_t entry_size;
83 uint32_t pe_array_crc32;
84} __attribute__((packed)) gpt_header_t;
85
86typedef struct {
87 /** Raw header. Has more bytes alloced than sizeof(gpt_header_t)!
88 * See gpt_read_gpt_header() to know why. */
89 gpt_header_t * raw_data;
90 /** Device where the data are from */
91 service_id_t device;
92 /** Linked list of partitions (initially NULL) */
93} gpt_t;
94
95/** GPT partition entry */
96typedef struct {
97 uint8_t part_type[16];
98 uint8_t part_id[16];
99 uint64_t start_lba;
100 uint64_t end_lba;
101 uint64_t attributes;
102 uint8_t part_name[72];
103} __attribute__((packed)) gpt_entry_t;
104
105
106//typedef struct g_part {
107 ///** Partition entry is in use **/
108 //bool present;
109 ///** Address of first block */
110 //aoff64_t start_addr;
111 ///** Number of blocks */
112 //aoff64_t length;
113 ///** Raw data access */
114 //gpt_entry_t raw_data; //TODO: a pointer or just a member?
115//}gpt_part_t;
116typedef gpt_entry_t gpt_part_t;
117
118
119typedef struct gpt_parts {
120 /** Number of entries */
121 size_t fill;
122 /** Size of the array */
123 size_t arr_size;
124 /** Resizable partition array */
125 gpt_entry_t * part_array;
126} gpt_partitions_t;
127
128
129typedef struct gpt_table {
130 gpt_t * gpt;
131 gpt_partitions_t * parts;
132} gpt_table_t;
133
134struct partition_type {
135 const char * desc;
136 const char * guid;
137};
138
139extern const struct partition_type gpt_ptypes[];
140
141
142extern gpt_t * gpt_alloc_gpt_header(void);
143extern gpt_t * gpt_read_gpt_header(service_id_t dev_handle);
144extern int gpt_write_gpt_header(gpt_t * header, service_id_t dev_handle);
145
146extern gpt_partitions_t * gpt_alloc_partitions(void);
147extern gpt_partitions_t * gpt_read_partitions (gpt_t * gpt);
148extern int gpt_write_partitions (gpt_partitions_t * parts, gpt_t * header, service_id_t dev_handle);
149extern gpt_part_t * gpt_alloc_partition (gpt_partitions_t * parts);
150extern int gpt_add_partition (gpt_partitions_t * parts, gpt_part_t * partition);
151extern int gpt_remove_partition(gpt_partitions_t * parts, size_t idx);
152
153extern size_t gpt_get_part_type (gpt_part_t * p);
154extern void gpt_set_part_type (gpt_part_t * p, size_t type);
155extern void gpt_set_start_lba (gpt_part_t * p, uint64_t start);
156extern uint64_t gpt_get_start_lba (gpt_part_t * p);
157extern void gpt_set_end_lba (gpt_part_t * p, uint64_t end);
158extern uint64_t gpt_get_end_lba (gpt_part_t * p);
159extern unsigned char * gpt_get_part_name (gpt_part_t * p);
160extern void gpt_set_part_name (gpt_part_t * p, char * name[], size_t length);
161extern bool gpt_get_flag (gpt_part_t * p, GPT_ATTR flag);
162extern void gpt_set_flag (gpt_part_t * p, GPT_ATTR flag, bool value);
163
164
165
166#define gpt_part_foreach(parts, iterator) \
167 for(gpt_part_t * iterator = (parts)->part_array; \
168 iterator < (parts)->part_array + (parts)->fill; ++iterator)
169
170extern void gpt_free_gpt(gpt_t * gpt);
171extern void gpt_free_partitions(gpt_partitions_t * parts);
172
173#endif
174
Note: See TracBrowser for help on using the repository browser.