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130 lines
4.0 KiB
130 lines
4.0 KiB
/* system/core/include/diskconfig/diskconfig.h |
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* |
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* Copyright 2008, The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#ifndef __LIBS_DISKCONFIG_H |
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#define __LIBS_DISKCONFIG_H |
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#include <stdint.h> |
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#include <sys/types.h> |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#define MAX_NAME_LEN 512 |
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#define MAX_NUM_PARTS 16 |
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/* known partition schemes */ |
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#define PART_SCHEME_MBR 0x1 |
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#define PART_SCHEME_GPT 0x2 |
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/* PC Bios partition status */ |
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#define PC_PART_ACTIVE 0x80 |
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#define PC_PART_NORMAL 0x0 |
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/* Known (rather, used by us) partition types */ |
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#define PC_PART_TYPE_LINUX 0x83 |
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#define PC_PART_TYPE_EXTENDED 0x05 |
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#define PC_PART_TYPE_FAT32 0x0c |
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#define PC_NUM_BOOT_RECORD_PARTS 4 |
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#define PC_EBR_LOGICAL_PART 0 |
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#define PC_EBR_NEXT_PTR_PART 1 |
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#define PC_BIOS_BOOT_SIG 0xAA55 |
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#define PC_MBR_DISK_OFFSET 0 |
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#define PC_MBR_SIZE 512 |
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#define PART_ACTIVE_FLAG 0x1 |
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struct chs { |
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uint8_t head; |
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uint8_t sector; |
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uint8_t cylinder; |
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} __attribute__((__packed__)); |
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/* 16 byte pc partition descriptor that sits in MBR and EPBR. |
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* Note: multi-byte entities have little-endian layout on disk */ |
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struct pc_partition { |
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uint8_t status; /* byte 0 */ |
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struct chs start; /* bytes 1-3 */ |
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uint8_t type; /* byte 4 */ |
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struct chs end; /* bytes 5-7 */ |
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uint32_t start_lba; /* bytes 8-11 */ |
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uint32_t len_lba; /* bytes 12-15 */ |
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} __attribute__((__packed__)); |
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struct pc_boot_record { |
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uint8_t code[440]; /* bytes 0-439 */ |
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uint32_t disk_sig; /* bytes 440-443 */ |
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uint16_t pad; /* bytes 444-445 */ |
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struct pc_partition ptable[PC_NUM_BOOT_RECORD_PARTS]; /* bytes 446-509 */ |
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uint16_t mbr_sig; /* bytes 510-511 */ |
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} __attribute__((__packed__)); |
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struct part_info { |
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char *name; |
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uint8_t flags; |
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uint8_t type; |
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uint32_t len_kb; /* in 1K-bytes */ |
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uint32_t start_lba; /* the LBA where this partition begins */ |
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}; |
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struct disk_info { |
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char *device; |
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uint8_t scheme; |
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int sect_size; /* expected sector size in bytes. MUST BE POWER OF 2 */ |
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uint32_t skip_lba; /* in sectors (1 unit of LBA) */ |
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uint32_t num_lba; /* the size of the disk in LBA units */ |
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struct part_info *part_lst; |
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int num_parts; |
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}; |
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struct write_list { |
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struct write_list *next; |
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loff_t offset; |
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uint32_t len; |
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uint8_t data[0]; |
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}; |
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struct write_list *alloc_wl(uint32_t data_len); |
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void free_wl(struct write_list *item); |
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struct write_list *wlist_add(struct write_list **lst, struct write_list *item); |
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void wlist_free(struct write_list *lst); |
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int wlist_commit(int fd, struct write_list *lst, int test); |
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struct disk_info *load_diskconfig(const char *fn, char *path_override); |
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int dump_disk_config(struct disk_info *dinfo); |
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int apply_disk_config(struct disk_info *dinfo, int test); |
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char *find_part_device(struct disk_info *dinfo, const char *name); |
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int process_disk_config(struct disk_info *dinfo); |
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struct part_info *find_part(struct disk_info *dinfo, const char *name); |
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int write_raw_image(const char *dst, const char *src, loff_t offset, int test); |
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/* For MBR partition schemes */ |
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struct write_list *config_mbr(struct disk_info *dinfo); |
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char *find_mbr_part(struct disk_info *dinfo, const char *name); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* __LIBS_DISKCONFIG_H */
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