141 lines
4.4 KiB
C
141 lines
4.4 KiB
C
/*
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* Copyright (c) 2009-2013, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google, Inc. nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef __FASTBOOTD_PATITIONS_
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#define __FASTBOOTD_PATITIONS_
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#include <stdint.h>
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#define GPT_ENTRIES 128
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#define GPT_NAMELEN 36
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#define GPT_FLAG_SYSTEM (1ULL << 0)
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#define GPT_FLAG_BOOTABLE (1ULL << 2)
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#define GPT_FLAG_READONLY (1ULL << 60)
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#define GPT_FLAG_DOAUTOMOUNT (1ULL << 63)
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// it should be passed in little endian order
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struct GPT_entry_raw {
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uint8_t type_guid[16];
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uint8_t partition_guid[16];
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uint64_t first_lba; // little endian
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uint64_t last_lba;
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uint64_t flags;
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uint16_t name[GPT_NAMELEN]; // UTF-16 LE
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};
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struct GPT_mapping {
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void *map_ptr;
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void *ptr;
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unsigned size;
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};
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struct GPT_entry_table {
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int fd;
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struct GPT_mapping header_map;
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struct GPT_mapping entries_map;
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struct GPT_mapping sec_header_map;
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struct GPT_mapping sec_entries_map;
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struct GPT_header *header;
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struct GPT_entry_raw *entries;
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struct GPT_header *second_header;
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struct GPT_entry_raw *second_entries;
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unsigned sector_size;
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unsigned partition_table_size;
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int second_valid;
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};
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struct GPT_header {
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uint8_t signature[8];
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uint32_t revision;
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uint32_t header_size;
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uint32_t header_checksum;
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uint32_t reserved_zeros;
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uint64_t current_lba;
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uint64_t backup_lba;
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uint64_t first_usable_lba;
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uint64_t last_usable_lba;
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uint8_t disk_guid[16];
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uint64_t entries_lba;
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uint32_t entries_count;
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uint32_t entry_size;
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uint32_t partition_array_checksum;
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// the rest should be filled with zeros
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} __attribute__((packed));
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struct GPT_content {
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struct GPT_header header;
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struct GPT_entry_raw *entries;
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};
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struct GPT_entry_table* GPT_get_device(const char *, unsigned lba);
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void GPT_release_device(struct GPT_entry_table *);
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void GPT_edit_entry(struct GPT_entry_table *table,
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struct GPT_entry_raw *old_entry,
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struct GPT_entry_raw *new_entry);
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int GPT_delete_entry(struct GPT_entry_table *table, struct GPT_entry_raw *entry);
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void GPT_add_entry(struct GPT_entry_table *table, struct GPT_entry_raw *entry);
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struct GPT_entry_raw *GPT_get_pointer(struct GPT_entry_table *table, struct GPT_entry_raw *entry);
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struct GPT_entry_raw *GPT_get_pointer_by_guid(struct GPT_entry_table *, const char *);
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struct GPT_entry_raw *GPT_get_pointer_by_name(struct GPT_entry_table *, const char *);
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//Use after every edit operation
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void GPT_sync();
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void GPT_to_UTF16(uint16_t *, const char *, int );
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void GPT_from_UTF16(char *, const uint16_t *, int);
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int GPT_parse_entry(char *string, struct GPT_entry_raw *entry);
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void GPT_default_content(struct GPT_content *content, struct GPT_entry_table *table);
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void GPT_release_content(struct GPT_content *content);
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int GPT_parse_file(int fd, struct GPT_content *content);
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int GPT_write_content(const char *device, struct GPT_content *content);
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int gpt_mmap(struct GPT_mapping *mapping, uint64_t location, int size, int fd);
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void gpt_unmap(struct GPT_mapping *mapping);
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#endif
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