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disk: Provide API to get partition by name for specific type

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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>
This commit is contained in:
Sam Protsenko 2017-09-22 01:51:58 +03:00 • committed by Tom Rini
parent 19d141a0f9
commit 3078909556
2 changed files with 28 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
disk/part.c
View file

@ -21,6 +21,9 @@
#define PRINTF(fmt,args...)
#endif
/* Check all partition types */
#define PART_TYPE_ALL -1
DECLARE_GLOBAL_DATA_PTR;
#ifdef HAVE_BLOCK_DEVICE
@ -626,8 +629,8 @@ cleanup:
return ret;
}
int part_get_info_by_name(struct blk_desc *dev_desc, const char *name,
disk_partition_t *info)
int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name,
disk_partition_t *info, int part_type)
{
struct part_driver *first_drv =
ll_entry_start(struct part_driver, part_driver);
@ -638,6 +641,8 @@ int part_get_info_by_name(struct blk_desc *dev_desc, const char *name,
int ret;
int i;
for (i = 1; i < part_drv->max_entries; i++) {
if (part_type >= 0 && part_type != part_drv->part_type)
break;
ret = part_drv->get_info(dev_desc, i, info);
if (ret != 0) {
/* no more entries in table */
@ -652,6 +657,12 @@ int part_get_info_by_name(struct blk_desc *dev_desc, const char *name,
return -1;
}
int part_get_info_by_name(struct blk_desc *dev_desc, const char *name,
disk_partition_t *info)
{
return part_get_info_by_name_type(dev_desc, name, info, PART_TYPE_ALL);
}
void part_set_generic_name(const struct blk_desc *dev_desc,
int part_num, char *name)
{

15
include/part.h
View file

@ -173,6 +173,21 @@ 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_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,
disk_partition_t *info, int part_type);
/**
* part_get_info_by_name() - Search for a partition by name
* among all available registered partitions