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disk: part: implement generic function part_get_info_by_name()

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So far partition search by name has been supported only on the EFI partition
table. This patch extends the search to all partition tables.

Rename part_get_info_efi_by_name() to part_get_info_by_name(), move it from
part_efi.c into part.c and make it a generic function which traverses all part
drivers and searches all partitions (in the order given by the linked list).

For this a new variable struct part_driver.max_entries is added, which limits
the number of partitions searched. For EFI this was GPT_ENTRY_NUMBERS.
Similarly the limit is defined for DOS, ISO, MAC and AMIGA partition tables.

Signed-off-by: Petr Kulhavy <brain@jikos.cz>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Steve Rae <steve.rae@raedomain.com>
This commit is contained in:
Petr Kulhavy 2016-09-09 10:27:15 +02:00 • committed by Tom Rini
parent ba07984068
commit 87b8530fe2
8 changed files with 53 additions and 33 deletions
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32
include/part.h
View file

@ -28,6 +28,11 @@ struct block_drvr {
#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
*/
@ -146,6 +151,20 @@ int blk_get_device_by_str(const char *ifname, const char *dev_str,
int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
struct blk_desc **dev_desc,
disk_partition_t *info, int allow_whole_dev);
/**
* 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 - '0' on match, '-1' on no match, otherwise error
*/
int part_get_info_by_name(struct blk_desc *dev_desc,
const char *name, disk_partition_t *info);
extern const struct block_drvr block_drvr[];
#else
static inline struct blk_desc *blk_get_dev(const char *ifname, int dev)
@ -189,6 +208,7 @@ static inline int blk_get_device_part_str(const char *ifname,
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
@ -224,18 +244,6 @@ struct part_driver {
#ifdef CONFIG_EFI_PARTITION
#include <part_efi.h>
/* disk/part_efi.c */
/**
* part_get_info_efi_by_name() - Find the specified GPT partition table entry
*
* @param dev_desc - block device descriptor
* @param gpt_name - the specified table entry name
* @param info - returns the disk partition info
*
* @return - '0' on match, '-1' on no match, otherwise error
*/
int part_get_info_efi_by_name(struct blk_desc *dev_desc,
const char *name, disk_partition_t *info);
/**
* write_gpt_table() - Write the GUID Partition Table to disk
*