From c2cb58107e2bd45461591091fc84a3f14d4ce994 Mon Sep 17 00:00:00 2001
From: Michael Chang <mchang@suse.com>
Date: Mon, 1 Apr 2024 14:54:38 +0800
Subject: [PATCH 016/272] treat mdadm ddf fakeraid as simple device

---
 grub-core/osdep/linux/getroot.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/grub-core/osdep/linux/getroot.c b/grub-core/osdep/linux/getroot.c
index 7dd775d2a..0c6c12945 100644
--- a/grub-core/osdep/linux/getroot.c
+++ b/grub-core/osdep/linux/getroot.c
@@ -119,7 +119,7 @@ struct btrfs_ioctl_search_args {
                                struct btrfs_ioctl_fs_info_args)
 
 static int
-grub_util_is_imsm (const char *os_dev);
+grub_util_is_imsm_or_ddf (const char *os_dev);
 
 
 #define ESCAPED_PATH_MAX (4 * PATH_MAX)
@@ -635,10 +635,10 @@ out:
 }
 
 static int
-grub_util_is_imsm (const char *os_dev)
+grub_util_is_imsm_or_ddf (const char *os_dev)
 {
   int retry;
-  int is_imsm = 0;
+  int is_imsm_or_ddf = 0;
   int container_seen = 0;
   const char *dev = os_dev;
 
@@ -699,10 +699,17 @@ grub_util_is_imsm (const char *os_dev)
 	  if (strncmp (buf, "MD_METADATA=imsm",
 		       sizeof ("MD_METADATA=imsm") - 1) == 0)
 	    {
-	      is_imsm = 1;
+	      is_imsm_or_ddf = 1;
 	      grub_util_info ("%s is imsm", dev);
 	      break;
 	    }
+	  if (strncmp (buf, "MD_METADATA=ddf",
+		       sizeof ("MD_METADATA=ddf") - 1) == 0)
+	    {
+	      is_imsm_or_ddf = 1;
+	      grub_util_info ("%s is ddf", dev);
+	      break;
+	    }
 	}
 
       free (buf);
@@ -713,7 +720,7 @@ grub_util_is_imsm (const char *os_dev)
 
   if (dev != os_dev)
     free ((void *) dev);
-  return is_imsm;
+  return is_imsm_or_ddf;
 }
 
 char *
@@ -1078,7 +1085,7 @@ grub_util_get_dev_abstraction_os (const char *os_dev)
 
   /* Check for RAID.  */
   if (!strncmp (os_dev, "/dev/md", 7) && ! grub_util_device_is_mapped (os_dev)
-      && !grub_util_is_imsm (os_dev))
+      && !grub_util_is_imsm_or_ddf (os_dev))
     return GRUB_DEV_ABSTRACTION_RAID;
   return GRUB_DEV_ABSTRACTION_NONE;
 }
-- 
2.41.0