mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-24 21:54:01 +00:00
e75e4cf5d9
We have to use 'Return:' to render the description of the return value in the HTML documentation. Fixes:f55aa4454a("part: Add a fallback for part_get_bootable()") Fixes:dcffa4428d("part: Add a function to find the first bootable partition") Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
705 lines
21 KiB
C
705 lines
21 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2000-2004
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#ifndef _PART_H
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#define _PART_H
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#include <blk.h>
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#include <ide.h>
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#include <uuid.h>
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#include <linker_lists.h>
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#include <linux/errno.h>
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#include <linux/list.h>
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struct block_drvr {
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char *name;
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int (*select_hwpart)(int dev_num, int hwpart);
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};
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#define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \
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((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \
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((x & 0xffff0000) ? 16 : 0))
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#define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1))
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/* Part types */
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#define PART_TYPE_UNKNOWN 0x00
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#define PART_TYPE_MAC 0x01
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#define PART_TYPE_DOS 0x02
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#define PART_TYPE_ISO 0x03
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#define PART_TYPE_AMIGA 0x04
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#define PART_TYPE_EFI 0x05
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/* maximum number of partition entries supported by search */
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#define DOS_ENTRY_NUMBERS 8
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#define ISO_ENTRY_NUMBERS 64
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#define MAC_ENTRY_NUMBERS 64
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#define AMIGA_ENTRY_NUMBERS 8
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/*
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* Type string for U-Boot bootable partitions
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*/
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#define BOOT_PART_TYPE "U-Boot" /* primary boot partition type */
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#define BOOT_PART_COMP "PPCBoot" /* PPCBoot compatibility type */
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/* device types */
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#define DEV_TYPE_UNKNOWN 0xff /* not connected */
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#define DEV_TYPE_HARDDISK 0x00 /* harddisk */
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#define DEV_TYPE_TAPE 0x01 /* Tape */
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#define DEV_TYPE_CDROM 0x05 /* CD-ROM */
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#define DEV_TYPE_OPDISK 0x07 /* optical disk */
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#define PART_NAME_LEN 32
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#define PART_TYPE_LEN 32
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#define MAX_SEARCH_PARTITIONS 128
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#define PART_BOOTABLE ((int)BIT(0))
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#define PART_EFI_SYSTEM_PARTITION ((int)BIT(1))
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struct disk_partition {
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lbaint_t start; /* # of first block in partition */
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lbaint_t size; /* number of blocks in partition */
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ulong blksz; /* block size in bytes */
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uchar name[PART_NAME_LEN]; /* partition name */
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uchar type[PART_TYPE_LEN]; /* string type description */
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/*
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* The bootable is a bitmask with the following fields:
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*
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* PART_BOOTABLE the MBR bootable flag is set
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* PART_EFI_SYSTEM_PARTITION the partition is an EFI system partition
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*/
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int bootable;
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#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
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char uuid[UUID_STR_LEN + 1]; /* filesystem UUID as string, if exists */
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#endif
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#ifdef CONFIG_PARTITION_TYPE_GUID
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char type_guid[UUID_STR_LEN + 1]; /* type GUID as string, if exists */
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#endif
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#ifdef CONFIG_DOS_PARTITION
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uchar sys_ind; /* partition type */
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#endif
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};
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/* Accessors for struct disk_partition field ->uuid */
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extern char *__invalid_use_of_disk_partition_uuid;
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static inline const char *disk_partition_uuid(const struct disk_partition *info)
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{
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#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
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return info->uuid;
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#else
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return __invalid_use_of_disk_partition_uuid;
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#endif
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}
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static inline void disk_partition_set_uuid(struct disk_partition *info,
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const char *val)
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{
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#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
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strlcpy(info->uuid, val, UUID_STR_LEN + 1);
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#endif
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}
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static inline void disk_partition_clr_uuid(struct disk_partition *info)
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{
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#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
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*info->uuid = '\0';
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#endif
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}
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/* Accessors for struct disk_partition field ->type_guid */
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extern char *__invalid_use_of_disk_partition_type_guid;
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/**
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* disk_partition_type_guid() - get partition type GUID
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*
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* By using this function to get the partition type GUID we can use
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* 'if (IS_ENABLED(CONFIG_PARTITION_TYPE_GUID))' instead of
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* '#ifdef CONFIG_PARTITION_TYPE_GUID'.
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*
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* @info: partition information
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* Return: partition type GUID
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*/
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static inline const
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char *disk_partition_type_guid(const struct disk_partition *info)
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{
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#ifdef CONFIG_PARTITION_TYPE_GUID
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return info->type_guid;
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#else
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return __invalid_use_of_disk_partition_type_guid;
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#endif
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}
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/**
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* disk_partition_set_type_guid() - set partition type GUID
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*
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* By using this function to set the partition type GUID we can use
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* 'if (IS_ENABLED(CONFIG_PARTITION_TYPE_GUID))' instead of
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* '#ifdef CONFIG_PARTITION_TYPE_GUID'.
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*
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* @info: partition information
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* @val: partition type GUID as string
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*/
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static inline void disk_partition_set_type_guid(struct disk_partition *info,
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const char *val)
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{
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#ifdef CONFIG_PARTITION_TYPE_GUID
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strlcpy(info->type_guid, val, UUID_STR_LEN + 1);
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#endif
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}
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static inline void disk_partition_clr_type_guid(struct disk_partition *info)
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{
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#ifdef CONFIG_PARTITION_TYPE_GUID
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*info->type_guid = '\0';
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#endif
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}
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/* Accessors for struct disk_partition field ->sys_ind */
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extern int __invalid_use_of_disk_partition_sys_ind;
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static inline uint disk_partition_sys_ind(const struct disk_partition *info)
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{
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#ifdef CONFIG_DOS_PARTITION
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return info->sys_ind;
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#else
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return __invalid_use_of_disk_partition_sys_ind;
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#endif
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}
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struct disk_part {
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int partnum;
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struct disk_partition gpt_part_info;
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struct list_head list;
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};
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/* Misc _get_dev functions */
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#if CONFIG_IS_ENABLED(PARTITIONS)
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/**
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* blk_get_dev() - get a pointer to a block device given its type and number
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*
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* Each interface allocates its own devices and typically struct blk_desc is
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* contained with the interface's data structure. There is no global
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* numbering for block devices, so the interface name must be provided.
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*
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* @ifname: Interface name (e.g. "ide", "scsi")
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* @dev: Device number (0 for first device on that interface, 1 for
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* second, etc.
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* Return:
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* pointer to the block device, or NULL if not available, or an error occurred.
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*/
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struct blk_desc *blk_get_dev(const char *ifname, int dev);
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struct blk_desc *mg_disk_get_dev(int dev);
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/**
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* part_get_info_by_type() - Get partitions from a block device using a specific
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* partition driver
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*
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* Each interface allocates its own devices and typically struct blk_desc is
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* contained with the interface's data structure. There is no global
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* numbering for block devices, so the interface name must be provided.
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*
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* @desc: Block device descriptor
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* @part: Partition number to read
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* @part_type: Partition driver to use, or PART_TYPE_UNKNOWN to automatically
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* choose a driver
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* @info: Returned partition information
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*
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* Return: 0 on success, negative errno on failure
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*/
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int part_get_info_by_type(struct blk_desc *desc, int part, int part_type,
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struct disk_partition *info);
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int part_get_info(struct blk_desc *desc, int part,
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struct disk_partition *info);
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/**
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* part_get_info_whole_disk() - get partition info for the special case of
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* a partition occupying the entire disk.
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*
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* @desc: block device descriptor
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* @info: returned partition information
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* Return: 0 on success
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*/
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int part_get_info_whole_disk(struct blk_desc *desc,
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struct disk_partition *info);
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void part_print(struct blk_desc *desc);
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void part_init(struct blk_desc *desc);
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void dev_print(struct blk_desc *desc);
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/**
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* blk_get_device_by_str() - Get a block device given its interface/hw partition
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*
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* Each interface allocates its own devices and typically struct blk_desc is
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* contained with the interface's data structure. There is no global
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* numbering for block devices, so the interface name must be provided.
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*
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* The hardware parition is not related to the normal software partitioning
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* of a device - each hardware partition is effectively a separately
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* accessible block device. When a hardware parition is selected on MMC the
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* other hardware partitions become inaccessible. The same block device is
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* used to access all hardware partitions, but its capacity may change when a
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* different hardware partition is selected.
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*
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* When a hardware partition number is given, the block device switches to
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* that hardware partition.
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*
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* @ifname: Interface name (e.g. "ide", "scsi")
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* @dev_str: Device and optional hw partition. This can either be a string
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* containing the device number (e.g. "2") or the device number
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* and hardware partition number (e.g. "2.4") for devices that
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* support it (currently only MMC).
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* @desc: Returns a pointer to the block device on success
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* Return: block device number (local to the interface), or -1 on error
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*/
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int blk_get_device_by_str(const char *ifname, const char *dev_str,
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struct blk_desc **desc);
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/**
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* blk_get_device_part_str() - Get a block device and partition
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*
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* This calls blk_get_device_by_str() to look up a device. It also looks up
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* a partition and returns information about it.
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*
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* @dev_part_str is in the format <dev>.<hw_part>:<part> where
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*
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* * <dev> is the device number,
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*
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* * <hw_part> is the optional hardware partition number and
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*
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* * <part> is the partition number.
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*
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* If @ifname is "hostfs", then this function returns the sandbox host block
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* device.
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*
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* If @ifname is "ubi", then this function returns 0, with @info set to a
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* special UBI device.
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*
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* If @dev_part_str is NULL or empty or "-", then this function looks up
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* the "bootdevice" environment variable and uses that string instead.
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*
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* If the partition string is empty then the first partition is used. If the
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* partition string is "auto" then the first bootable partition is used.
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*
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* @ifname: Interface name (e.g. "ide", "scsi")
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* @dev_part_str: Device and partition string
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* @desc: Returns a pointer to the block device on success
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* @info: Returns partition information
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* @allow_whole_dev: true to allow the user to select partition 0
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* (which means the whole device), false to require a valid
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* partition number >= 1
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* Return: partition number, or -1 on error
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*
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*/
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int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
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struct blk_desc **desc,
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struct disk_partition *info, int allow_whole_dev);
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/**
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* part_get_info_by_name() - Search for a partition by name
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* among all available registered partitions
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*
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* @desc: block device descriptor
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* @name: the specified table entry name
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* @info: returns the disk partition info
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*
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* Return: the partition number on match (starting on 1), -1 on no match,
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* otherwise error
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*/
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int part_get_info_by_name(struct blk_desc *desc, const char *name,
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struct disk_partition *info);
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/**
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* part_get_info_by_dev_and_name_or_num() - Get partition info from dev number
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* and part name, or dev number and
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* part number.
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*
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* Parse a device number and partition description (either name or number)
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* in the form of device number plus partition name separated by a "#"
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* (like "device_num#partition_name") or a device number plus a partition number
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* separated by a ":". For example both "0#misc" and "0:1" can be valid
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* partition descriptions for a given interface. If the partition is found, sets
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* desc and part_info accordingly with the information of the partition.
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*
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* @dev_iface: Device interface
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* @dev_part_str: Input partition description, like "0#misc" or "0:1"
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* @desc: Place to store the device description pointer
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* @part_info: Place to store the partition information
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* @allow_whole_dev: true to allow the user to select partition 0
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* (which means the whole device), false to require a valid
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* partition number >= 1
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* Return: the partition number on success, or negative errno on error
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*/
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int part_get_info_by_dev_and_name_or_num(const char *dev_iface,
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const char *dev_part_str,
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struct blk_desc **desc,
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struct disk_partition *part_info,
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int allow_whole_dev);
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/**
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* part_set_generic_name() - create generic partition like hda1 or sdb2
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*
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* Helper function for partition tables, which don't hold partition names
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* (DOS, ISO). Generates partition name out of the device type and partition
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* number.
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*
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* @desc: pointer to the block device
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* @part_num: partition number for which the name is generated
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* @name: buffer where the name is written
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*/
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void part_set_generic_name(const struct blk_desc *desc, int part_num,
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char *name);
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extern const struct block_drvr block_drvr[];
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#else
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static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
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{ return NULL; }
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static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; }
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static inline int part_get_info(struct blk_desc *desc, int part,
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struct disk_partition *info) { return -1; }
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static inline int part_get_info_whole_disk(struct blk_desc *desc,
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struct disk_partition *info)
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{ return -1; }
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static inline void part_print(struct blk_desc *desc) {}
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static inline void part_init(struct blk_desc *desc) {}
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static inline void dev_print(struct blk_desc *desc) {}
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static inline int blk_get_device_by_str(const char *ifname, const char *dev_str,
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struct blk_desc **desc)
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{ return -1; }
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static inline int blk_get_device_part_str(const char *ifname,
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const char *dev_part_str,
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struct blk_desc **desc,
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struct disk_partition *info,
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int allow_whole_dev)
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{ *desc = NULL; return -1; }
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static inline int part_get_info_by_name(struct blk_desc *desc, const char *name,
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struct disk_partition *info)
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{
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return -ENOENT;
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}
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static inline int
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part_get_info_by_dev_and_name_or_num(const char *dev_iface,
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const char *dev_part_str,
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struct blk_desc **desc,
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struct disk_partition *part_info,
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int allow_whole_dev)
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{
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*desc = NULL;
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return -ENOSYS;
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}
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#endif
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struct udevice;
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/**
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* disk_blk_read() - read blocks from a disk partition
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*
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* @dev: Device to read from (UCLASS_PARTITION)
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* @start: Start block number to read in the partition (0=first)
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* @blkcnt: Number of blocks to read
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* @buffer: Destination buffer for data read
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* Return: number of blocks read, or -ve error number (see the
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* IS_ERR_VALUE() macro
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*/
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ulong disk_blk_read(struct udevice *dev, lbaint_t start, lbaint_t blkcnt,
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void *buffer);
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/**
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* disk_blk_write() - write to a disk partition
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*
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* @dev: Device to write to (UCLASS_PARTITION)
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* @start: Start block number to write in the partition (0=first)
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* @blkcnt: Number of blocks to write
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* @buffer: Source buffer for data to write
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* Return: number of blocks written, or -ve error number (see the
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* IS_ERR_VALUE() macro
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*/
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ulong disk_blk_write(struct udevice *dev, lbaint_t start, lbaint_t blkcnt,
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const void *buffer);
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/**
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* disk_blk_erase() - erase a section of a disk partition
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*
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* @dev: Device to (partially) erase (UCLASS_PARTITION)
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* @start: Start block number to erase in the partition (0=first)
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* @blkcnt: Number of blocks to erase
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* Return: number of blocks erased, or -ve error number (see the
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* IS_ERR_VALUE() macro
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*/
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ulong disk_blk_erase(struct udevice *dev, lbaint_t start, lbaint_t blkcnt);
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/*
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* We don't support printing partition information in SPL and only support
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* getting partition information in a few cases.
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*/
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#ifdef CONFIG_SPL_BUILD
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# define part_print_ptr(x) NULL
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# if defined(CONFIG_SPL_FS_EXT4) || defined(CONFIG_SPL_FS_FAT) || \
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defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION)
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# define part_get_info_ptr(x) x
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# else
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# define part_get_info_ptr(x) NULL
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# endif
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#else
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#define part_print_ptr(x) x
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#define part_get_info_ptr(x) x
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#endif
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/**
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* struct part_driver - partition driver
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*/
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struct part_driver {
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/** @name: partition name */
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const char *name;
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/** @part_type: (MBR) partition type */
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int part_type;
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/** @max_entries: maximum number of partition table entries */
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const int max_entries;
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/**
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* @get_info: Get information about a partition
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*
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* @get_info.desc: Block device descriptor
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* @get_info.part: Partition number (1 = first)
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* @get_info.info: Returns partition information
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*/
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int (*get_info)(struct blk_desc *desc, int part,
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struct disk_partition *info);
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/**
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* @print: Print partition information
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*
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* @print.desc: Block device descriptor
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*/
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void (*print)(struct blk_desc *desc);
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/**
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|
* @test: Test if a device contains this partition type
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|
*
|
|
* @test.desc: Block device descriptor
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|
* @test.Return:
|
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* 0 if the block device appears to contain this partition type,
|
|
* -ve if not
|
|
*/
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|
int (*test)(struct blk_desc *desc);
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|
};
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|
|
|
/* Declare a new U-Boot partition 'driver' */
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#define U_BOOT_PART_TYPE(__name) \
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ll_entry_declare(struct part_driver, __name, part_driver)
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|
|
|
#include <part_efi.h>
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|
|
|
#if CONFIG_IS_ENABLED(EFI_PARTITION)
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|
/* disk/part_efi.c */
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/**
|
|
* write_gpt_table() - Write the GUID Partition Table to disk
|
|
*
|
|
* @desc: block device descriptor
|
|
* @gpt_h: pointer to GPT header representation
|
|
* @gpt_e: pointer to GPT partition table entries
|
|
*
|
|
* Return: zero on success, otherwise error
|
|
*/
|
|
int write_gpt_table(struct blk_desc *desc, gpt_header *gpt_h, gpt_entry *gpt_e);
|
|
|
|
/**
|
|
* gpt_fill_pte() - Fill the GPT partition table entry
|
|
*
|
|
* @desc: block device descriptor
|
|
* @gpt_h: GPT header representation
|
|
* @gpt_e: GPT partition table entries
|
|
* @partitions: list of partitions
|
|
* @parts: number of partitions
|
|
*
|
|
* Return: zero on success
|
|
*/
|
|
int gpt_fill_pte(struct blk_desc *desc, gpt_header *gpt_h, gpt_entry *gpt_e,
|
|
struct disk_partition *partitions, int parts);
|
|
|
|
/**
|
|
* gpt_fill_header() - Fill the GPT header
|
|
*
|
|
* @desc: block device descriptor
|
|
* @gpt_h: GPT header representation
|
|
* @str_guid: disk guid string representation
|
|
* @parts_count: number of partitions
|
|
*
|
|
* Return: error on str_guid conversion error
|
|
*/
|
|
int gpt_fill_header(struct blk_desc *desc, gpt_header *gpt_h, char *str_guid,
|
|
int parts_count);
|
|
|
|
/**
|
|
* gpt_restore() - Restore GPT partition table
|
|
*
|
|
* @desc: block device descriptor
|
|
* @str_disk_guid: disk GUID
|
|
* @partitions: list of partitions
|
|
* @parts_count: number of partitions
|
|
*
|
|
* Return: 0 on success
|
|
*/
|
|
int gpt_restore(struct blk_desc *desc, char *str_disk_guid,
|
|
struct disk_partition *partitions, const int parts_count);
|
|
|
|
/**
|
|
* is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
|
|
*
|
|
* @desc: block device descriptor
|
|
* @buf: buffer which contains the MBR and Primary GPT info
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int is_valid_gpt_buf(struct blk_desc *desc, void *buf);
|
|
|
|
/**
|
|
* write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
|
|
*
|
|
* @desc: block device descriptor
|
|
* @buf: buffer which contains the MBR and Primary GPT info
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int write_mbr_and_gpt_partitions(struct blk_desc *desc, void *buf);
|
|
|
|
/**
|
|
* gpt_verify_headers() - Read and check CRC32 of the GPT's header
|
|
* and partition table entries (PTE)
|
|
*
|
|
* As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
|
|
*
|
|
* @desc: block device descriptor
|
|
* @gpt_head: pointer to GPT header data read from medium
|
|
* @gpt_pte: pointer to GPT partition table enties read from medium
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int gpt_verify_headers(struct blk_desc *desc, gpt_header *gpt_head,
|
|
gpt_entry **gpt_pte);
|
|
|
|
/**
|
|
* gpt_repair_headers() - Function to repair the GPT's header
|
|
* and partition table entries (PTE)
|
|
*
|
|
* @desc: block device descriptor
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int gpt_repair_headers(struct blk_desc *desc);
|
|
|
|
/**
|
|
* gpt_verify_partitions() - Function to check if partitions' name, start and
|
|
* size correspond to '$partitions' env variable
|
|
*
|
|
* This function checks if on medium stored GPT data is in sync with information
|
|
* provided in '$partitions' environment variable. Specificially, name, start
|
|
* and size of the partition is checked.
|
|
*
|
|
* @desc: block device descriptor
|
|
* @partitions: partition data read from '$partitions' env variable
|
|
* @parts: number of partitions read from '$partitions' env variable
|
|
* @gpt_head: pointer to GPT header data read from medium
|
|
* @gpt_pte: pointer to GPT partition table enties read from medium
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int gpt_verify_partitions(struct blk_desc *desc,
|
|
struct disk_partition *partitions, int parts,
|
|
gpt_header *gpt_head, gpt_entry **gpt_pte);
|
|
|
|
|
|
/**
|
|
* get_disk_guid() - Read the GUID string from a device's GPT
|
|
*
|
|
* This function reads the GUID string from a block device whose descriptor
|
|
* is provided.
|
|
*
|
|
* @desc: block device descriptor
|
|
* @guid: pre-allocated string in which to return the GUID
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int get_disk_guid(struct blk_desc *desc, char *guid);
|
|
|
|
#endif
|
|
|
|
#if CONFIG_IS_ENABLED(DOS_PARTITION)
|
|
/**
|
|
* is_valid_dos_buf() - Ensure that a DOS MBR image is valid
|
|
*
|
|
* @buf: buffer which contains the MBR
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int is_valid_dos_buf(void *buf);
|
|
|
|
/**
|
|
* write_mbr_sector() - write DOS MBR
|
|
*
|
|
* @desc: block device descriptor
|
|
* @buf: buffer which contains the MBR
|
|
*
|
|
* Return: 0 on success, otherwise error
|
|
*/
|
|
int write_mbr_sector(struct blk_desc *desc, void *buf);
|
|
|
|
int write_mbr_partitions(struct blk_desc *dev,
|
|
struct disk_partition *p, int count, unsigned int disksig);
|
|
int layout_mbr_partitions(struct disk_partition *p, int count,
|
|
lbaint_t total_sectors);
|
|
|
|
#endif
|
|
|
|
#if CONFIG_IS_ENABLED(PARTITIONS)
|
|
/**
|
|
* part_driver_get_count() - get partition driver count
|
|
*
|
|
* Return: number of partition drivers
|
|
*/
|
|
static inline int part_driver_get_count(void)
|
|
{
|
|
return ll_entry_count(struct part_driver, part_driver);
|
|
}
|
|
|
|
/**
|
|
* part_driver_get_first() - get first partition driver
|
|
*
|
|
* Return: pointer to first partition driver on success, otherwise NULL
|
|
*/
|
|
static inline struct part_driver *part_driver_get_first(void)
|
|
{
|
|
return ll_entry_start(struct part_driver, part_driver);
|
|
}
|
|
|
|
/**
|
|
* part_get_type_by_name() - Get partition type by name
|
|
*
|
|
* @name: Name of partition type to look up (not case-sensitive)
|
|
* Return:
|
|
* Corresponding partition type (PART\_TYPE\_...) or PART\_TYPE\_UNKNOWN
|
|
*/
|
|
int part_get_type_by_name(const char *name);
|
|
|
|
/**
|
|
* part_get_bootable() - Find the first bootable partition
|
|
*
|
|
* @desc: Block-device descriptor
|
|
* Return: first bootable partition, or 0 if there is none
|
|
*/
|
|
int part_get_bootable(struct blk_desc *desc);
|
|
|
|
#else
|
|
static inline int part_driver_get_count(void)
|
|
{ return 0; }
|
|
|
|
static inline struct part_driver *part_driver_get_first(void)
|
|
{ return NULL; }
|
|
|
|
static inline bool part_get_bootable(struct blk_desc *desc)
|
|
{ return false; }
|
|
|
|
#endif /* CONFIG_PARTITIONS */
|
|
|
|
#endif /* _PART_H */
|