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https://github.com/smaeul/u-boot.git
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3078909556
There is already existing function part_get_info_by_name(). But sometimes user is particularly interested in looking for only specific partition type. This patch implements such an API that provides partition searching by name for specified partition type. Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
450 lines
14 KiB
C
450 lines
14 KiB
C
/*
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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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* SPDX-License-Identifier: GPL-2.0+
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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 <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 64
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typedef 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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int bootable; /* Active/Bootable flag is set */
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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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} disk_partition_t;
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struct disk_part {
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int partnum;
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disk_partition_t 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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#ifdef CONFIG_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 pointer to the block device, or NULL if not available, or an
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* 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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int host_get_dev_err(int dev, struct blk_desc **blk_devp);
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/* disk/part.c */
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int part_get_info(struct blk_desc *dev_desc, int part, disk_partition_t *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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int part_get_info_whole_disk(struct blk_desc *dev_desc, disk_partition_t *info);
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void part_print(struct blk_desc *dev_desc);
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void part_init(struct blk_desc *dev_desc);
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void dev_print(struct blk_desc *dev_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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* @dev_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 **dev_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:
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* <dev>.<hw_part>:<part> where <dev> is the device number,
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* <hw_part> is the optional hardware partition number and
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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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* @dev_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 **dev_desc,
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disk_partition_t *info, int allow_whole_dev);
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/**
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* part_get_info_by_name_type() - Search for a partition by name
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* for only specified partition type
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*
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* @param dev_desc - block device descriptor
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* @param gpt_name - the specified table entry name
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* @param info - returns the disk partition info
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* @param part_type - only search in partitions of this type
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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_type(struct blk_desc *dev_desc, const char *name,
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disk_partition_t *info, int part_type);
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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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* @param dev_desc - block device descriptor
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* @param gpt_name - the specified table entry name
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* @param 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 *dev_desc,
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const char *name, disk_partition_t *info);
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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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* @dev_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 *dev_desc,
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int part_num, 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 *dev_desc, int part,
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disk_partition_t *info) { return -1; }
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static inline int part_get_info_whole_disk(struct blk_desc *dev_desc,
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disk_partition_t *info)
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{ return -1; }
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static inline void part_print(struct blk_desc *dev_desc) {}
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static inline void part_init(struct blk_desc *dev_desc) {}
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static inline void dev_print(struct blk_desc *dev_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 **dev_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 **dev_desc,
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disk_partition_t *info,
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int allow_whole_dev)
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{ *dev_desc = NULL; return -1; }
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#endif
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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_EXT_SUPPORT) || defined(CONFIG_SPL_FAT_SUPPORT) || \
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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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struct part_driver {
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const char *name;
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int part_type;
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const int max_entries; /* maximum number of entries to search */
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/**
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* get_info() - Get information about a partition
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*
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* @dev_desc: Block device descriptor
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* @part: Partition number (1 = first)
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* @info: Returns partition information
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*/
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int (*get_info)(struct blk_desc *dev_desc, int part,
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disk_partition_t *info);
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/**
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* print() - Print partition information
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*
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* @dev_desc: Block device descriptor
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*/
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void (*print)(struct blk_desc *dev_desc);
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/**
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* test() - Test if a device contains this partition type
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*
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* @dev_desc: Block device descriptor
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* @return 0 if the block device appears to contain this partition
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* type, -ve if not
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*/
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int (*test)(struct blk_desc *dev_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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/**
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* write_gpt_table() - Write the GUID Partition Table to disk
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*
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* @param dev_desc - block device descriptor
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* @param gpt_h - pointer to GPT header representation
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* @param gpt_e - pointer to GPT partition table entries
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*
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* @return - zero on success, otherwise error
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*/
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int write_gpt_table(struct blk_desc *dev_desc,
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gpt_header *gpt_h, gpt_entry *gpt_e);
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/**
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* gpt_fill_pte(): Fill the GPT partition table entry
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*
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* @param dev_desc - block device descriptor
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* @param gpt_h - GPT header representation
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* @param gpt_e - GPT partition table entries
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* @param partitions - list of partitions
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* @param parts - number of partitions
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*
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* @return zero on success
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*/
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int gpt_fill_pte(struct blk_desc *dev_desc,
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gpt_header *gpt_h, gpt_entry *gpt_e,
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disk_partition_t *partitions, int parts);
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/**
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* gpt_fill_header(): Fill the GPT header
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*
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* @param dev_desc - block device descriptor
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* @param gpt_h - GPT header representation
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* @param str_guid - disk guid string representation
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* @param parts_count - number of partitions
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*
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* @return - error on str_guid conversion error
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*/
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int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h,
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char *str_guid, int parts_count);
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/**
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* gpt_restore(): Restore GPT partition table
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*
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* @param dev_desc - block device descriptor
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* @param str_disk_guid - disk GUID
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* @param partitions - list of partitions
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* @param parts - number of partitions
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*
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* @return zero on success
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*/
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int gpt_restore(struct blk_desc *dev_desc, char *str_disk_guid,
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disk_partition_t *partitions, const int parts_count);
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/**
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* is_valid_gpt_buf() - Ensure that the Primary GPT information is valid
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*
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* @param dev_desc - block device descriptor
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* @param buf - buffer which contains the MBR and Primary GPT info
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*
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* @return - '0' on success, otherwise error
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*/
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int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf);
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/**
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* write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT
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*
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* @param dev_desc - block device descriptor
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* @param buf - buffer which contains the MBR and Primary GPT info
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*
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* @return - '0' on success, otherwise error
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*/
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int write_mbr_and_gpt_partitions(struct blk_desc *dev_desc, void *buf);
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/**
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* gpt_verify_headers() - Function to read and CRC32 check of the GPT's header
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* and partition table entries (PTE)
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*
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* As a side effect if sets gpt_head and gpt_pte so they point to GPT data.
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*
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* @param dev_desc - block device descriptor
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* @param gpt_head - pointer to GPT header data read from medium
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* @param gpt_pte - pointer to GPT partition table enties read from medium
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*
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* @return - '0' on success, otherwise error
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*/
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int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head,
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gpt_entry **gpt_pte);
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/**
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* gpt_verify_partitions() - Function to check if partitions' name, start and
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* size correspond to '$partitions' env variable
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*
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* This function checks if on medium stored GPT data is in sync with information
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* provided in '$partitions' environment variable. Specificially, name, start
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* and size of the partition is checked.
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*
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* @param dev_desc - block device descriptor
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* @param partitions - partition data read from '$partitions' env variable
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* @param parts - number of partitions read from '$partitions' env variable
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* @param gpt_head - pointer to GPT header data read from medium
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* @param gpt_pte - pointer to GPT partition table enties read from medium
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*
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* @return - '0' on success, otherwise error
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*/
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int gpt_verify_partitions(struct blk_desc *dev_desc,
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disk_partition_t *partitions, int parts,
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gpt_header *gpt_head, gpt_entry **gpt_pte);
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/**
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* get_disk_guid() - Function to read the GUID string from a device's GPT
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*
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* This function reads the GUID string from a block device whose descriptor
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* is provided.
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*
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* @param dev_desc - block device descriptor
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* @param guid - pre-allocated string in which to return the GUID
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*
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* @return - '0' on success, otherwise error
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*/
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int get_disk_guid(struct blk_desc *dev_desc, char *guid);
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#endif
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#if CONFIG_IS_ENABLED(DOS_PARTITION)
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/**
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* is_valid_dos_buf() - Ensure that a DOS MBR image is valid
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*
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* @param buf - buffer which contains the MBR
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*
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* @return - '0' on success, otherwise error
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*/
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int is_valid_dos_buf(void *buf);
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/**
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* write_mbr_partition() - write DOS MBR
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*
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* @param dev_desc - block device descriptor
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* @param buf - buffer which contains the MBR
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*
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* @return - '0' on success, otherwise error
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*/
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int write_mbr_partition(struct blk_desc *dev_desc, void *buf);
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#endif
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#endif /* _PART_H */
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