/* SPDX-License-Identifier: GPL-2.0+ */ /* * (C) Copyright 2000-2004 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. */ #ifndef _PART_H #define _PART_H #include #include #include #include #include #include struct block_drvr { char *name; int (*select_hwpart)(int dev_num, int hwpart); }; #define LOG2(x) (((x & 0xaaaaaaaa) ? 1 : 0) + ((x & 0xcccccccc) ? 2 : 0) + \ ((x & 0xf0f0f0f0) ? 4 : 0) + ((x & 0xff00ff00) ? 8 : 0) + \ ((x & 0xffff0000) ? 16 : 0)) #define LOG2_INVALID(type) ((type)((sizeof(type)<<3)-1)) /* Part types */ #define PART_TYPE_UNKNOWN 0x00 #define PART_TYPE_MAC 0x01 #define PART_TYPE_DOS 0x02 #define PART_TYPE_ISO 0x03 #define PART_TYPE_AMIGA 0x04 #define PART_TYPE_EFI 0x05 /* maximum number of partition entries supported by search */ #define DOS_ENTRY_NUMBERS 8 #define ISO_ENTRY_NUMBERS 64 #define MAC_ENTRY_NUMBERS 64 #define AMIGA_ENTRY_NUMBERS 8 /* * Type string for U-Boot bootable partitions */ #define BOOT_PART_TYPE "U-Boot" /* primary boot partition type */ #define BOOT_PART_COMP "PPCBoot" /* PPCBoot compatibility type */ /* device types */ #define DEV_TYPE_UNKNOWN 0xff /* not connected */ #define DEV_TYPE_HARDDISK 0x00 /* harddisk */ #define DEV_TYPE_TAPE 0x01 /* Tape */ #define DEV_TYPE_CDROM 0x05 /* CD-ROM */ #define DEV_TYPE_OPDISK 0x07 /* optical disk */ #define PART_NAME_LEN 32 #define PART_TYPE_LEN 32 #define MAX_SEARCH_PARTITIONS 128 #define PART_BOOTABLE ((int)BIT(0)) #define PART_EFI_SYSTEM_PARTITION ((int)BIT(1)) struct disk_partition { lbaint_t start; /* # of first block in partition */ lbaint_t size; /* number of blocks in partition */ ulong blksz; /* block size in bytes */ uchar name[PART_NAME_LEN]; /* partition name */ uchar type[PART_TYPE_LEN]; /* string type description */ /* * The bootable is a bitmask with the following fields: * * PART_BOOTABLE the MBR bootable flag is set * PART_EFI_SYSTEM_PARTITION the partition is an EFI system partition */ int bootable; #if CONFIG_IS_ENABLED(PARTITION_UUIDS) char uuid[UUID_STR_LEN + 1]; /* filesystem UUID as string, if exists */ #endif #ifdef CONFIG_PARTITION_TYPE_GUID char type_guid[UUID_STR_LEN + 1]; /* type GUID as string, if exists */ #endif #ifdef CONFIG_DOS_PARTITION uchar sys_ind; /* partition type */ #endif }; struct disk_part { int partnum; struct disk_partition gpt_part_info; struct list_head list; }; /* Misc _get_dev functions */ #if CONFIG_IS_ENABLED(PARTITIONS) /** * blk_get_dev() - get a pointer to a block device given its type and number * * Each interface allocates its own devices and typically struct blk_desc is * contained with the interface's data structure. There is no global * numbering for block devices, so the interface name must be provided. * * @ifname: Interface name (e.g. "ide", "scsi") * @dev: Device number (0 for first device on that interface, 1 for * second, etc. * Return: pointer to the block device, or NULL if not available, or an * error occurred. */ struct blk_desc *blk_get_dev(const char *ifname, int dev); struct blk_desc *mg_disk_get_dev(int dev); int host_get_dev_err(int dev, struct blk_desc **blk_devp); /* disk/part.c */ int part_get_info(struct blk_desc *dev_desc, int part, struct disk_partition *info); /** * part_get_info_whole_disk() - get partition info for the special case of * a partition occupying the entire disk. */ int part_get_info_whole_disk(struct blk_desc *dev_desc, struct disk_partition *info); void part_print(struct blk_desc *dev_desc); void part_init(struct blk_desc *dev_desc); void dev_print(struct blk_desc *dev_desc); /** * blk_get_device_by_str() - Get a block device given its interface/hw partition * * Each interface allocates its own devices and typically struct blk_desc is * contained with the interface's data structure. There is no global * numbering for block devices, so the interface name must be provided. * * The hardware parition is not related to the normal software partitioning * of a device - each hardware partition is effectively a separately * accessible block device. When a hardware parition is selected on MMC the * other hardware partitions become inaccessible. The same block device is * used to access all hardware partitions, but its capacity may change when a * different hardware partition is selected. * * When a hardware partition number is given, the block device switches to * that hardware partition. * * @ifname: Interface name (e.g. "ide", "scsi") * @dev_str: Device and optional hw partition. This can either be a string * containing the device number (e.g. "2") or the device number * and hardware partition number (e.g. "2.4") for devices that * support it (currently only MMC). * @dev_desc: Returns a pointer to the block device on success * Return: block device number (local to the interface), or -1 on error */ int blk_get_device_by_str(const char *ifname, const char *dev_str, struct blk_desc **dev_desc); /** * blk_get_device_part_str() - Get a block device and partition * * This calls blk_get_device_by_str() to look up a device. It also looks up * a partition and returns information about it. * * @dev_part_str is in the format: * .: where is the device number, * is the optional hardware partition number and * is the partition number * * If ifname is "hostfs" then this function returns the sandbox host block * device. * * If ifname is ubi, then this function returns 0, with @info set to a * special UBI device. * * If @dev_part_str is NULL or empty or "-", then this function looks up * the "bootdevice" environment variable and uses that string instead. * * If the partition string is empty then the first partition is used. If the * partition string is "auto" then the first bootable partition is used. * * @ifname: Interface name (e.g. "ide", "scsi") * @dev_part_str: Device and partition string * @dev_desc: Returns a pointer to the block device on success * @info: Returns partition information * @allow_whole_dev: true to allow the user to select partition 0 * (which means the whole device), false to require a valid * partition number >= 1 * Return: partition number, or -1 on error * */ int blk_get_device_part_str(const char *ifname, const char *dev_part_str, struct blk_desc **dev_desc, struct disk_partition *info, int allow_whole_dev); /** * part_get_info_by_name_type() - Search for a partition by name * for only specified partition type * * @param dev_desc - block device descriptor * @param gpt_name - the specified table entry name * @param info - returns the disk partition info * @param part_type - only search in partitions of this type * * Return: - the partition number on match (starting on 1), -1 on no match, * otherwise error */ int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name, struct disk_partition *info, int part_type); /** * part_get_info_by_name() - Search for a partition by name * among all available registered partitions * * @param dev_desc - block device descriptor * @param gpt_name - the specified table entry name * @param info - returns the disk partition info * * Return: - the partition number on match (starting on 1), -1 on no match, * otherwise error */ int part_get_info_by_name(struct blk_desc *dev_desc, const char *name, struct disk_partition *info); /** * Get partition info from dev number + part name, or dev number + part number. * * Parse a device number and partition description (either name or number) * in the form of device number plus partition name separated by a "#" * (like "device_num#partition_name") or a device number plus a partition number * separated by a ":". For example both "0#misc" and "0:1" can be valid * partition descriptions for a given interface. If the partition is found, sets * dev_desc and part_info accordingly with the information of the partition. * * @param[in] dev_iface Device interface * @param[in] dev_part_str Input partition description, like "0#misc" or "0:1" * @param[out] dev_desc Place to store the device description pointer * @param[out] part_info Place to store the partition information * @param[in] allow_whole_dev true to allow the user to select partition 0 * (which means the whole device), false to require a valid * partition number >= 1 * Return: the partition number on success, or negative errno on error */ int part_get_info_by_dev_and_name_or_num(const char *dev_iface, const char *dev_part_str, struct blk_desc **dev_desc, struct disk_partition *part_info, int allow_whole_dev); /** * part_set_generic_name() - create generic partition like hda1 or sdb2 * * Helper function for partition tables, which don't hold partition names * (DOS, ISO). Generates partition name out of the device type and partition * number. * * @dev_desc: pointer to the block device * @part_num: partition number for which the name is generated * @name: buffer where the name is written */ void part_set_generic_name(const struct blk_desc *dev_desc, int part_num, char *name); extern const struct block_drvr block_drvr[]; #else static inline struct blk_desc *blk_get_dev(const char *ifname, int dev) { return NULL; } static inline struct blk_desc *mg_disk_get_dev(int dev) { return NULL; } static inline int part_get_info(struct blk_desc *dev_desc, int part, struct disk_partition *info) { return -1; } static inline int part_get_info_whole_disk(struct blk_desc *dev_desc, struct disk_partition *info) { return -1; } static inline void part_print(struct blk_desc *dev_desc) {} static inline void part_init(struct blk_desc *dev_desc) {} static inline void dev_print(struct blk_desc *dev_desc) {} static inline int blk_get_device_by_str(const char *ifname, const char *dev_str, struct blk_desc **dev_desc) { return -1; } static inline int blk_get_device_part_str(const char *ifname, const char *dev_part_str, struct blk_desc **dev_desc, struct disk_partition *info, int allow_whole_dev) { *dev_desc = NULL; return -1; } static inline int part_get_info_by_dev_and_name_or_num(const char *dev_iface, const char *dev_part_str, struct blk_desc **dev_desc, struct disk_partition *part_info, int allow_whole_dev) { *dev_desc = NULL; return -ENOSYS; } #endif /* * We don't support printing partition information in SPL and only support * getting partition information in a few cases. */ #ifdef CONFIG_SPL_BUILD # define part_print_ptr(x) NULL # if defined(CONFIG_SPL_FS_EXT4) || defined(CONFIG_SPL_FS_FAT) || \ defined(CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION) # define part_get_info_ptr(x) x # else # define part_get_info_ptr(x) NULL # endif #else #define part_print_ptr(x) x #define part_get_info_ptr(x) x #endif struct part_driver { const char *name; int part_type; const int max_entries; /* maximum number of entries to search */ /** * get_info() - Get information about a partition * * @dev_desc: Block device descriptor * @part: Partition number (1 = first) * @info: Returns partition information */ int (*get_info)(struct blk_desc *dev_desc, int part, struct disk_partition *info); /** * print() - Print partition information * * @dev_desc: Block device descriptor */ void (*print)(struct blk_desc *dev_desc); /** * test() - Test if a device contains this partition type * * @dev_desc: Block device descriptor * @return 0 if the block device appears to contain this partition * type, -ve if not */ int (*test)(struct blk_desc *dev_desc); }; /* Declare a new U-Boot partition 'driver' */ #define U_BOOT_PART_TYPE(__name) \ ll_entry_declare(struct part_driver, __name, part_driver) #include #if CONFIG_IS_ENABLED(EFI_PARTITION) /* disk/part_efi.c */ /** * write_gpt_table() - Write the GUID Partition Table to disk * * @param dev_desc - block device descriptor * @param gpt_h - pointer to GPT header representation * @param gpt_e - pointer to GPT partition table entries * * Return: - zero on success, otherwise error */ int write_gpt_table(struct blk_desc *dev_desc, gpt_header *gpt_h, gpt_entry *gpt_e); /** * gpt_fill_pte(): Fill the GPT partition table entry * * @param dev_desc - block device descriptor * @param gpt_h - GPT header representation * @param gpt_e - GPT partition table entries * @param partitions - list of partitions * @param parts - number of partitions * * Return: zero on success */ int gpt_fill_pte(struct blk_desc *dev_desc, gpt_header *gpt_h, gpt_entry *gpt_e, struct disk_partition *partitions, int parts); /** * gpt_fill_header(): Fill the GPT header * * @param dev_desc - block device descriptor * @param gpt_h - GPT header representation * @param str_guid - disk guid string representation * @param parts_count - number of partitions * * Return: - error on str_guid conversion error */ int gpt_fill_header(struct blk_desc *dev_desc, gpt_header *gpt_h, char *str_guid, int parts_count); /** * gpt_restore(): Restore GPT partition table * * @param dev_desc - block device descriptor * @param str_disk_guid - disk GUID * @param partitions - list of partitions * @param parts - number of partitions * * Return: zero on success */ int gpt_restore(struct blk_desc *dev_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 * * @param dev_desc - block device descriptor * @param buf - buffer which contains the MBR and Primary GPT info * * Return: - '0' on success, otherwise error */ int is_valid_gpt_buf(struct blk_desc *dev_desc, void *buf); /** * write_mbr_and_gpt_partitions() - write MBR, Primary GPT and Backup GPT * * @param dev_desc - block device descriptor * @param 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 *dev_desc, void *buf); /** * gpt_verify_headers() - Function to read and CRC32 check 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. * * @param dev_desc - block device descriptor * @param gpt_head - pointer to GPT header data read from medium * @param gpt_pte - pointer to GPT partition table enties read from medium * * Return: - '0' on success, otherwise error */ int gpt_verify_headers(struct blk_desc *dev_desc, gpt_header *gpt_head, gpt_entry **gpt_pte); /** * 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. * * @param dev_desc - block device descriptor * @param partitions - partition data read from '$partitions' env variable * @param parts - number of partitions read from '$partitions' env variable * @param gpt_head - pointer to GPT header data read from medium * @param gpt_pte - pointer to GPT partition table enties read from medium * * Return: - '0' on success, otherwise error */ int gpt_verify_partitions(struct blk_desc *dev_desc, struct disk_partition *partitions, int parts, gpt_header *gpt_head, gpt_entry **gpt_pte); /** * get_disk_guid() - Function to read the GUID string from a device's GPT * * This function reads the GUID string from a block device whose descriptor * is provided. * * @param dev_desc - block device descriptor * @param guid - pre-allocated string in which to return the GUID * * Return: - '0' on success, otherwise error */ int get_disk_guid(struct blk_desc *dev_desc, char *guid); #endif #if CONFIG_IS_ENABLED(DOS_PARTITION) /** * is_valid_dos_buf() - Ensure that a DOS MBR image is valid * * @param 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 * * @param dev_desc - block device descriptor * @param buf - buffer which contains the MBR * * Return: - '0' on success, otherwise error */ int write_mbr_sector(struct blk_desc *dev_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); } #else static inline int part_driver_get_count(void) { return 0; } static inline struct part_driver *part_driver_get_first(void) { return NULL; } #endif /* CONFIG_PARTITIONS */ #endif /* _PART_H */