osdep/linux/getroot: Detect DDF container similar to IMSM

Resolves: #RHEL-44336
Signed-off-by: Nicolas Frayer <nfrayer@redhat.com>

0479-osdep-linux-getroot-Detect-DDF-container-similar-to-.patch

@@ -0,0 +1,86 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Renaud=20M=C3=A9trich?= <rmetrich@redhat.com>
+Date: Thu, 24 Apr 2025 11:43:28 +0200
+Subject: [PATCH] osdep/linux/getroot: Detect DDF container similar to IMSM
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Similarly to Intel IMSM, there are BIOS and UEFI implementations that
+support DDF containers natively.
+
+DDF and IMSM are very similar in handling, especially these should not
+be considered as RAID abstraction. This fixes the requirement of having
+a device map when probing DDF containers.
+
+Fixes: https://issues.redhat.com/browse/RHEL-44336
+
+Signed-off-by: Renaud Métrich <rmetrich@redhat.com>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+---
+ 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 893527a..7430391 100644
+--- a/grub-core/osdep/linux/getroot.c
++++ b/grub-core/osdep/linux/getroot.c
+@@ -131,7 +131,7 @@ 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)
+@@ -762,10 +762,10 @@ 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;
+ 
+@@ -826,10 +826,17 @@ 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);
+@@ -840,7 +847,7 @@ grub_util_is_imsm (const char *os_dev)
+ 
+   if (dev != os_dev)
+     free ((void *) dev);
+-  return is_imsm;
++  return is_imsm_or_ddf;
+ }
+ 
+ char *
+@@ -1205,7 +1212,7 @@ 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;
+ }

grub.patches

@@ -475,3 +475,4 @@ Patch0475: 0475-appendedsig-documentation.patch
 Patch0476: 0476-efi-Add-efitextmode-command-for-getting-setting-the-.patch
 Patch0477: 0477-10_linux.in-escape-kernel-option-characters-properly.patch
 Patch0478: 0478-blscfg-check-if-variable-is-escaped-before-consideri.patch
+Patch0479: 0479-osdep-linux-getroot-Detect-DDF-container-similar-to-.patch

grub2.spec

@@ -16,7 +16,7 @@
 Name:		grub2
 Epoch:		1
 Version:	2.06
-Release:	109%{?dist}
+Release:	110%{?dist}
 Summary:	Bootloader with support for Linux, Multiboot and more
 License:	GPLv3+
 URL:		http://www.gnu.org/software/grub/
@@ -547,6 +547,10 @@ mv ${EFI_HOME}/grub.cfg.stb ${EFI_HOME}/grub.cfg
 %endif
 
 %changelog
+* Fri Jun 6 2025 Nicolas Frayer <nfrayer@redhat.com> - 2.06-110
+- osdep/linux/getroot: Detect DDF container similar to IMSM
+- Resolves: #RHEL-44336
+
 * Mon Jun 2 2025 Leo Sandoval <lsandova@redhat.com> 2.06-109
 - Handle special kernel parameter characters properly
 - Resolves: #RHEL-64297