api: storage: Add the missing write operation support
API_dev_write(va_list ap) is currently lacking the write support
to storage devices because, historically, those devices did not
implement block_write()
The solution has been tested by loading and booting a (patched)
GRUB instance in a QEMU vexpress-a9 environment. The disk write
operations were triggered with GRUB's save_env command.
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@gmail.com>
diff --git a/api/api_storage.c b/api/api_storage.c
index 2b90c18..7ae03ac 100644
--- a/api/api_storage.c
+++ b/api/api_storage.c
@@ -349,3 +349,27 @@
return dd->block_read(dd, start, len, buf);
#endif /* defined(CONFIG_BLK) */
}
+
+
+lbasize_t dev_write_stor(void *cookie, void *buf, lbasize_t len, lbastart_t start)
+{
+ struct blk_desc *dd = (struct blk_desc *)cookie;
+ int type = dev_stor_type(dd);
+
+ if (type == ENUM_MAX)
+ return 0;
+
+ if (!dev_stor_is_valid(type, dd))
+ return 0;
+
+#ifdef CONFIG_BLK
+ return blk_dwrite(dd, start, len, buf);
+#else
+ if (dd->block_write == NULL) {
+ debugf("no block_write() for device 0x%08x\n", cookie);
+ return 0;
+ }
+
+ return dd->block_write(dd, start, len, buf);
+#endif /* defined(CONFIG_BLK) */
+}