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-rw-r--r--common/avb_verify.c33
1 files changed, 32 insertions, 1 deletions
diff --git a/common/avb_verify.c b/common/avb_verify.c
index 20e35ade30..82ddebcfc2 100644
--- a/common/avb_verify.c
+++ b/common/avb_verify.c
@@ -700,6 +700,37 @@ static AvbIOResult get_unique_guid_for_partition(AvbOps *ops,
}
/**
+ * get_size_of_partition() - gets the size of a partition identified
+ * by a string name
+ *
+ * @ops: contains AVB ops handlers
+ * @partition: partition name (NUL-terminated UTF-8 string)
+ * @out_size_num_bytes: returns the value of a partition size
+ *
+ * @return:
+ * AVB_IO_RESULT_OK, on success (GUID found)
+ * AVB_IO_RESULT_ERROR_INSUFFICIENT_SPACE, out_size_num_bytes is NULL
+ * AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION, if partition was not found
+ */
+static AvbIOResult get_size_of_partition(AvbOps *ops,
+ const char *partition,
+ u64 *out_size_num_bytes)
+{
+ struct mmc_part *part;
+
+ if (!out_size_num_bytes)
+ return AVB_IO_RESULT_ERROR_INSUFFICIENT_SPACE;
+
+ part = get_partition(ops, partition);
+ if (!part)
+ return AVB_IO_RESULT_ERROR_NO_SUCH_PARTITION;
+
+ *out_size_num_bytes = part->info.blksz * part->info.size;
+
+ return AVB_IO_RESULT_OK;
+}
+
+/**
* ============================================================================
* AVB2.0 AvbOps alloc/initialisation/free
* ============================================================================
@@ -722,7 +753,7 @@ AvbOps *avb_ops_alloc(int boot_device)
ops_data->ops.read_is_device_unlocked = read_is_device_unlocked;
ops_data->ops.get_unique_guid_for_partition =
get_unique_guid_for_partition;
-
+ ops_data->ops.get_size_of_partition = get_size_of_partition;
ops_data->mmc_dev = boot_device;
return &ops_data->ops;