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disk: part: implement generic function part_get_info_by_uuid()

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Add function to search for a partition by UUID as partition
names may not be unique.

Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Acked-by: Casey Connolly <casey.connolly@linaro.org>
This commit is contained in:
Varadarajan Narayanan
2025-05-13 14:47:06 +05:30
committed by Tom Rini
parent 48db49b097
commit 43fd4bcefd
2 changed files with 59 additions and 0 deletions
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39
disk/part.c
View File

@@ -698,6 +698,45 @@ int part_get_info_by_name(struct blk_desc *desc, const char *name,
return -ENOENT; return -ENOENT;
} }
int part_get_info_by_uuid(struct blk_desc *desc, const char *uuid,
struct disk_partition *info)
{
struct part_driver *part_drv;
int ret;
int i;
if (!CONFIG_IS_ENABLED(PARTITION_UUIDS))
return -ENOENT;
part_drv = part_driver_lookup_type(desc);
if (!part_drv)
return -1;
if (!part_drv->get_info) {
log_debug("## Driver %s does not have the get_info() method\n",
part_drv->name);
return -ENOSYS;
}
for (i = 1; i < part_drv->max_entries; i++) {
ret = part_drv->get_info(desc, i, info);
if (ret != 0) {
/*
* Partition with this index can't be obtained, but
* further partitions might be, so keep checking.
*/
continue;
}
if (!strncasecmp(uuid, disk_partition_uuid(info), UUID_STR_LEN)) {
/* matched */
return i;
}
}
return -ENOENT;
}
/** /**
* Get partition info from device number and partition name. * Get partition info from device number and partition name.
* *

20
include/part.h
View File

@@ -315,6 +315,20 @@ int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
int part_get_info_by_name(struct blk_desc *desc, const char *name, int part_get_info_by_name(struct blk_desc *desc, const char *name,
struct disk_partition *info); struct disk_partition *info);
/**
* part_get_info_by_uuid() - Search for a partition by uuid
* among all available registered partitions
*
* @desc: block device descriptor
* @uuid: the specified table entry uuid
* @info: the disk partition info
*
* Return: the partition number on match (starting on 1), -ENOENT on no match,
* otherwise error
*/
int part_get_info_by_uuid(struct blk_desc *desc, const char *uuid,
struct disk_partition *info);
/** /**
* part_get_info_by_dev_and_name_or_num() - Get partition info from dev number * part_get_info_by_dev_and_name_or_num() - Get partition info from dev number
* and part name, or dev number and * and part name, or dev number and
@@ -386,6 +400,12 @@ static inline int part_get_info_by_name(struct blk_desc *desc, const char *name,
return -ENOENT; return -ENOENT;
} }
static inline int part_get_info_by_uuid(struct blk_desc *desc, const char *uuid,
struct disk_partition *info)
{
return -ENOENT;
}
static inline int static inline int
part_get_info_by_dev_and_name_or_num(const char *dev_iface, part_get_info_by_dev_and_name_or_num(const char *dev_iface,
const char *dev_part_str, const char *dev_part_str,