From 6444774dae24f439dae3b4bc8d73449d50f06240 Mon Sep 17 00:00:00 2001
From: Michael Chang <mchang@suse.com>
Date: Thu, 31 Dec 2020 21:54:07 +0800
Subject: [PATCH] install: fix software raid1 on esp

While running grub-install on an efi system where efi system partition
is configured as mdadm software raid1, it fails with errors like this:

  grub2-install: info: copying `/boot/grub2/x86_64-efi/core.efi' -> `/boot/efi/EFI/opensuse/grubx64.efi'.
  grub2-install: info: Registering with EFI: distributor = `opensuse', path = `\EFI\opensuse\grubx64.efi', ESP at mduuid/9182c46b9d469f79b48850b68f3371a5.
  grub2-install: info: executing efibootmgr --version </dev/null >/dev/null.
  grub2-install: info: executing modprobe -q efivars.
  grub2-install: info: executing efibootmgr -c -d.
  efibootmgr: option requires an argument -- 'd'
  efibootmgr version 14
  usage: efibootmgr [options]

This should work with mdadm raid1 with metadata 0.9 and 1.0 whose
superblocks are at the end of device. However
grub_install_register_efi() doesn't seem to work if the target is
multiple devices so that it errors out.

The patch changes grub_install_register_efi() to accept multiple devices
that can be used to creating efi boot entries for probed raid1 member
devices on mounted efi system partition.

This patch also adds check for metadata 0.9 or 1.0 or the validation
will fail to continue the install.

Signed-off-by: Michael Chang <mchang@suse.com>
---
 grub-core/disk/diskfilter.c         |  27 +++----
 grub-core/disk/mdraid1x_linux.c     |   3 +
 grub-core/osdep/basic/no_platform.c |   3 +-
 grub-core/osdep/unix/platform.c     |  57 +++++++++++----
 grub-core/osdep/windows/platform.c  |   3 +-
 include/grub/diskfilter.h           |   3 +-
 include/grub/util/install.h         |   5 +-
 util/grub-install.c                 | 107 ++++++++++++++++++++++++++--
 8 files changed, 171 insertions(+), 37 deletions(-)

--- a/grub-core/disk/diskfilter.c
+++ b/grub-core/disk/diskfilter.c
@@ -159,8 +159,8 @@
       for (m = arr->pvs; m; m = m->next)
 	if (m->disk && m->disk->id == disk->id
 	    && m->disk->dev->id == disk->dev->id
-	    && m->part_start == grub_partition_get_start (disk->partition)
-	    && m->part_size == grub_disk_native_sectors (disk))
+	    && grub_partition_get_start (m->disk->partition) == grub_partition_get_start (disk->partition)
+	    && grub_disk_native_sectors (m->disk) == grub_disk_native_sectors (disk))
 	  return 0;
     }
 
@@ -1340,19 +1340,23 @@
 	? (grub_memcmp (pv->id.uuid, id->uuid, id->uuidlen) == 0)
 	: (pv->id.id == id->id))
       {
+	char *part_name = NULL;
 	struct grub_diskfilter_lv *lv;
 	/* FIXME: Check whether the update time of the superblocks are
 	   the same.  */
-	if (pv->disk && grub_disk_native_sectors (disk) >= pv->part_size)
+	if (pv->disk && grub_disk_native_sectors (disk) >= grub_disk_native_sectors (pv->disk))
 	  return GRUB_ERR_NONE;
-	pv->disk = grub_disk_open (disk->name);
+	if (disk->partition)
+	  {
+	    char *p = grub_partition_get_name (disk->partition);
+	    if (p)
+	      part_name = grub_xasprintf ("%s,%s", disk->name, p);
+	    grub_free (p);
+	  }
+	pv->disk = grub_disk_open (part_name ? : disk->name);
+	grub_free (part_name);
 	if (!pv->disk)
 	  return grub_errno;
-	/* This could happen to LVM on RAID, pv->disk points to the
-	   raid device, we shouldn't change it.  */
-	pv->start_sector -= pv->part_start;
-	pv->part_start = grub_partition_get_start (disk->partition);
-	pv->part_size = grub_disk_native_sectors (disk);
 
 #ifdef GRUB_UTIL
 	{
@@ -1369,7 +1373,6 @@
 #endif
 	if (start_sector != (grub_uint64_t)-1)
 	  pv->start_sector = start_sector;
-	pv->start_sector += pv->part_start;
 	/* Add the device to the array. */
 	for (lv = array->lvs; lv; lv = lv->next)
 	  if (!lv->became_readable_at && lv->fullname && is_lv_readable (lv, 0))
@@ -1457,8 +1460,8 @@
       {
 	if (pv->disk && pv->disk->id == disk->id
 	    && pv->disk->dev->id == disk->dev->id
-	    && pv->part_start == grub_partition_get_start (disk->partition)
-	    && pv->part_size == grub_disk_native_sectors (disk))
+	    && grub_partition_get_start (pv->disk->partition) == grub_partition_get_start (disk->partition)
+	    && grub_disk_native_sectors (pv->disk) == grub_disk_native_sectors (disk))
 	  {
 	    if (vg_out)
 	      *vg_out = vg;
--- a/grub-core/disk/mdraid1x_linux.c
+++ b/grub-core/disk/mdraid1x_linux.c
@@ -208,6 +208,9 @@
 					 grub_le_to_cpu32 (sb.chunksize),
 					 grub_le_to_cpu32 (sb.layout),
 					 grub_le_to_cpu32 (sb.level));
+#ifdef GRUB_UTIL
+      array->mdraid1x_minor_version = minor_version;
+#endif
 
       return array;
     }
--- a/grub-core/osdep/basic/no_platform.c
+++ b/grub-core/osdep/basic/no_platform.c
@@ -33,7 +33,8 @@
 void
 grub_install_register_efi (grub_device_t efidir_grub_dev,
 			   const char *efifile_path,
-			   const char *efi_distributor)
+			   const char *efi_distributor,
+			   const char *force_disk)
 {
   grub_util_error ("%s", _("no EFI routines are available for your platform"));
 }
--- a/grub-core/osdep/unix/platform.c
+++ b/grub-core/osdep/unix/platform.c
@@ -132,15 +132,14 @@
 }
 
 int
-grub_install_register_efi (grub_device_t efidir_grub_dev,
+grub_install_register_efi (const grub_disk_t *efidir_grub_disk,
 			   const char *efifile_path,
-			   const char *efi_distributor)
+			   const char *efi_distributor,
+			   const char *force_disk)
 {
-  const char * efidir_disk;
-  int efidir_part;
   int ret;
-  efidir_disk = grub_util_biosdisk_get_osdev (efidir_grub_dev->disk);
-  efidir_part = efidir_grub_dev->disk->partition ? efidir_grub_dev->disk->partition->number + 1 : 1;
+  const grub_disk_t *curdisk;
+  int ndev = 0;
 
   if (grub_util_exec_redirect_null ((const char * []){ "efibootmgr", "--version", NULL }))
     {
@@ -158,22 +157,50 @@
   if (ret)
     return ret;
 
-  char *efidir_part_str = xasprintf ("%d", efidir_part);
+  for (curdisk = efidir_grub_disk; *curdisk; curdisk++)
+    ndev++;
 
-  if (!verbosity)
-    ret = grub_util_exec ((const char * []){ "efibootmgr", "-q",
+  for (curdisk = efidir_grub_disk; *curdisk; curdisk++)
+    {
+      const char * efidir_disk;
+      int efidir_part;
+      char *efidir_part_str;
+      char *new_efi_distributor = NULL;
+      grub_disk_t disk = *curdisk;
+
+      efidir_disk = force_disk ? : grub_util_biosdisk_get_osdev (disk);
+      if (!efidir_disk)
+	grub_util_error (_("%s: no device for efi"), disk->name);
+
+      efidir_part = disk->partition ? disk->partition->number + 1 : 1;
+      efidir_part_str = xasprintf ("%d", efidir_part);
+      if (ndev > 1)
+	{
+	  const char *p = grub_strrchr (efidir_disk, '/');
+	  new_efi_distributor = xasprintf ("%s (%s%d)\n",
+			efi_distributor,
+			p ? p + 1: efidir_disk,
+			efidir_part);
+	}
+
+      if (!verbosity)
+	ret = grub_util_exec ((const char * []){ "efibootmgr", "-q",
 	  "-c", "-d", efidir_disk,
 	  "-p", efidir_part_str, "-w",
-	  "-L", efi_distributor, "-l",
+	  "-L", new_efi_distributor ? : efi_distributor, "-l",
 	  efifile_path, NULL });
-  else
-    ret = grub_util_exec ((const char * []){ "efibootmgr",
+      else
+	ret = grub_util_exec ((const char * []){ "efibootmgr",
 	  "-c", "-d", efidir_disk,
 	  "-p", efidir_part_str, "-w",
-	  "-L", efi_distributor, "-l",
+	  "-L", new_efi_distributor ? : efi_distributor, "-l",
 	  efifile_path, NULL });
-  free (efidir_part_str);
-  return ret;
+      free (efidir_part_str);
+      free (new_efi_distributor);
+      if (ret)
+	return ret;
+    }
+  return 0;
 }
 
 void
--- a/grub-core/osdep/windows/platform.c
+++ b/grub-core/osdep/windows/platform.c
@@ -204,7 +204,8 @@
 int
 grub_install_register_efi (grub_device_t efidir_grub_dev,
 			   const char *efifile_path,
-			   const char *efi_distributor)
+			   const char *efi_distributor,
+			   const char *force_disk)
 {
   grub_uint16_t *boot_order, *new_boot_order;
   grub_uint16_t *distributor16;
--- a/include/grub/diskfilter.h
+++ b/include/grub/diskfilter.h
@@ -49,6 +49,7 @@
 
 #ifdef GRUB_UTIL
   struct grub_diskfilter *driver;
+  grub_uint8_t mdraid1x_minor_version;
 #endif
 };
 
@@ -66,8 +67,6 @@
   /* Optional.  */
   char *name;
   grub_disk_t disk;
-  grub_disk_addr_t part_start;
-  grub_disk_addr_t part_size;
   grub_disk_addr_t start_sector; /* Sector number where the data area starts. */
   struct grub_diskfilter_pv *next;
   /* Optional.  */
--- a/include/grub/util/install.h
+++ b/include/grub/util/install.h
@@ -236,9 +236,10 @@
 grub_install_get_powerpc_secure_boot (void);
 
 int
-grub_install_register_efi (grub_device_t efidir_grub_dev,
+grub_install_register_efi (const grub_disk_t *efidir_grub_disk,
 			   const char *efifile_path,
-			   const char *efi_distributor);
+			   const char *efi_distributor,
+			   const char *force_disk);
 
 void
 grub_install_register_ieee1275 (int is_prep, const char *install_device,
--- a/util/grub-install.c
+++ b/util/grub-install.c
@@ -1719,6 +1719,40 @@
 	    }
 	}
       prefix_drive = xasprintf ("(%s)", grub_drives[0]);
+
+      if (platform == GRUB_INSTALL_PLATFORM_X86_64_EFI
+	  && grub_dev->disk
+	  && grub_dev->disk->partition
+	  && grub_fs->fs_uuid)
+	{
+	  int raid_level;
+	  char *uuid = NULL;
+	  char *escaped_relpath = NULL;
+
+	  raid_level = probe_raid_level (grub_dev->disk);
+	  if (raid_level != 1)
+	    goto out;
+
+	  escaped_relpath = escape (relative_grubdir);
+	  if (!escaped_relpath)
+	    goto out;
+
+	  if (grub_fs->fs_uuid (grub_dev, &uuid) || !uuid)
+	    {
+	      grub_print_error ();
+	      grub_errno = 0;
+	      goto out;
+	    }
+
+	  if (!load_cfg_f)
+	    load_cfg_f = grub_util_fopen (load_cfg, "wb");
+	  have_load_cfg = 1;
+	  fprintf (load_cfg_f, "search --no-floppy --fs-uuid --set=root --hint='%s' %s\n", grub_drives[0], uuid);
+	  fprintf (load_cfg_f, "set prefix=($root)'%s'\n", escaped_relpath);
+	  grub_install_push_module ("search");
+ out:
+	  grub_free (escaped_relpath);
+	}
     }
 
 #ifdef __linux__
@@ -2258,9 +2292,13 @@
 	    {
 	      /* Try to make this image bootable using the EFI Boot Manager, if available.  */
 	      int ret;
-	      ret = grub_install_register_efi (efidir_grub_dev,
+	      grub_disk_t efidir_grub_disk[2];
+	      efidir_grub_disk[0] = efidir_grub_dev->disk;
+	      efidir_grub_disk[1] = NULL;
+	      ret = grub_install_register_efi (efidir_grub_disk,
 					       "\\System\\Library\\CoreServices",
-					       efi_distributor);
+					       efi_distributor,
+					       NULL);
 	      if (ret)
 	        grub_util_error (_("efibootmgr failed to register the boot entry: %s"),
 				 strerror (ret));
@@ -2314,7 +2352,11 @@
 	{
 	  char * efifile_path;
 	  char * part;
+	  int raid_level;
 	  int ret;
+	  grub_disk_t *efidir_grub_disk;
+	  grub_disk_memberlist_t list = NULL, cur;
+	  char * force_disk = NULL;
 
 	  /* Try to make this image bootable using the EFI Boot Manager, if available.  */
 	  if (!efi_distributor || efi_distributor[0] == '\0')
@@ -2331,8 +2373,65 @@
 			  efidir_grub_dev->disk->name,
 			  (part ? ",": ""), (part ? : ""));
 	  grub_free (part);
-	  ret = grub_install_register_efi (efidir_grub_dev,
-					   efifile_path, efi_distributor);
+
+	  raid_level = probe_raid_level (efidir_grub_dev->disk);
+	  if (raid_level >= 0 && raid_level != 1)
+	    grub_util_warn (_("unsupported raid level %d detected for efi system partition"), raid_level);
+	  if (raid_level == 1 && !efidir_grub_dev->disk->partition)
+	    {
+	      const char *raidname = NULL;
+
+	      if (efidir_grub_dev->disk->dev->disk_raidname)
+		raidname = efidir_grub_dev->disk->dev->disk_raidname (efidir_grub_dev->disk);
+	      if (raidname
+		  && (grub_strncmp (raidname, "mdraid09", sizeof ("mdraid09")) == 0
+		      || (grub_strcmp (raidname, "mdraid1x") == 0
+			  && ((struct grub_diskfilter_lv *) efidir_grub_dev->disk->data)->vg->mdraid1x_minor_version == 0)))
+		{
+		  if (efidir_grub_dev->disk->dev->disk_memberlist)
+		    list = efidir_grub_dev->disk->dev->disk_memberlist (efidir_grub_dev->disk);
+		}
+	      else
+		{
+		  grub_util_warn (_("this array has metadata at the start and may not be suitable as a efi system partition."
+		    " please ensure that your firmware understands md/v1.x metadata, or use --metadata=0.90"
+		    " to create the array."));
+		  /* Try to continue regardless metadata, nothing to lose here */
+		  if (efidir_grub_dev->disk->dev->disk_memberlist)
+		    list = efidir_grub_dev->disk->dev->disk_memberlist (efidir_grub_dev->disk);
+		}
+	    }
+	  else if (raid_level == 1)
+	    force_disk = grub_util_get_os_disk (install_device);
+	  if (list)
+	    {
+	      int i;
+	      int ndisk = 0;
+
+	      for (cur = list; cur; cur = cur->next)
+		++ndisk;
+	      efidir_grub_disk = xcalloc (ndisk + 1, sizeof (*efidir_grub_disk));
+	      for (cur = list, i = 0; i < ndisk; cur = cur->next, i++)
+		efidir_grub_disk[i] = cur->disk;
+	      efidir_grub_disk[ndisk] = NULL;
+	    }
+	  else
+	    {
+	      efidir_grub_disk = xcalloc (2, sizeof (*efidir_grub_disk));
+	      efidir_grub_disk[0] = efidir_grub_dev->disk;
+	      efidir_grub_disk[1] = NULL;
+	    }
+	  ret = grub_install_register_efi (efidir_grub_disk,
+					   efifile_path, efi_distributor,
+					   force_disk);
+	  while (list)
+	    {
+	      cur = list;
+	      list = list->next;
+	      grub_free (cur);
+	    }
+	  grub_free (force_disk);
+	  grub_free (efidir_grub_disk);
 	  if (ret)
 	    grub_util_error (_("efibootmgr failed to register the boot entry: %s"),
 			     strerror (ret));