disk: part: implement generic function part_get_info_by_uuid()
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>
diff --git a/disk/part.c b/disk/part.c
index 3031781..8eefda3 100644
--- a/disk/part.c
+++ b/disk/part.c
@@ -698,6 +698,45 @@
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.
*
diff --git a/include/part.h b/include/part.h
index fcb3c13..3e6eb0e 100644
--- a/include/part.h
+++ b/include/part.h
@@ -316,6 +316,20 @@
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
* and part name, or dev number and
* part number.
@@ -386,6 +400,12 @@
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
part_get_info_by_dev_and_name_or_num(const char *dev_iface,
const char *dev_part_str,