If a disk has an EFI system partition (ESP) then it can be used to
locate the boot files. Add a function to find the ESP.
Signed-off-by: Mayuresh Chitale <mchit...@ventanamicro.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schucha...@canonical.com>
---
disk/part.c | 16 ++++++++++++++++
include/part.h | 10 ++++++++++
2 files changed, 26 insertions(+)
diff --git a/disk/part.c b/disk/part.c
index 72241b7b23..2be0866671 100644
--- a/disk/part.c
+++ b/disk/part.c
@@ -841,3 +841,19 @@ int part_get_bootable(struct blk_desc *desc)
return 0;
}
+
+int part_get_esp(struct blk_desc *desc)
+{
+ struct disk_partition info;
+ int p;
+
+ for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
+ int ret;
+
+ ret = part_get_info(desc, p, &info);
+ if (!ret && (info.bootable & PART_EFI_SYSTEM_PARTITION))
+ return p;
+ }
+
+ return 0;
+}
diff --git a/include/part.h b/include/part.h
index db34bc6bb7..036f9fd762 100644
--- a/include/part.h
+++ b/include/part.h
@@ -689,6 +689,13 @@ int part_get_type_by_name(const char *name);
* @return first bootable partition, or 0 if there is none
*/
int part_get_bootable(struct blk_desc *desc);
+/**
+ * part_get_esp() - Find the EFI system partition
+ *
+ * @desc: Block-device descriptor
+ * @Return the EFI system partition, or 0 if there is none
+ */
+int part_get_esp(struct blk_desc *desc);
#else
static inline int part_driver_get_count(void)
@@ -700,6 +707,9 @@ static inline struct part_driver
*part_driver_get_first(void)
static inline bool part_get_bootable(struct blk_desc *desc)
{ return false; }
+static int part_get_esp(struct blk_desc *desc)
+{ return 0; }
+
#endif /* CONFIG_PARTITIONS */
#endif /* _PART_H */
--
2.34.1
