1 files changed, 86 insertions, 0 deletions
diff --git a/util/raid.c b/util/raid.c
new file mode 100644
index 0000000..a6aa5f9
--- /dev/null
+++ b/util/raid.c
@@ -0,0 +1,86 @@
+/* raid.c - RAID support for GRUB utils.  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2006,2007,2008  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* We only support RAID on Linux.  */
+#ifdef __linux__
+#include <grub/emu/misc.h>
+#include <grub/util/misc.h>
+#include <grub/util/raid.h>
+#include <grub/emu/getroot.h>
+
+#include <string.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <sys/types.h>
+
+#include <linux/types.h>
+#include <linux/major.h>
+#include <linux/raid/md_p.h>
+#include <linux/raid/md_u.h>
+
+char **
+grub_util_raid_getmembers (const char *name)
+{
+  int fd, ret, i, j;
+  char **devicelist;
+  mdu_version_t version;
+  mdu_array_info_t info;
+  mdu_disk_info_t disk;
+
+  fd = open (name, O_RDONLY);
+
+  if (fd == -1)
+    grub_util_error ("can't open %s: %s", name, strerror (errno));
+
+  ret = ioctl (fd, RAID_VERSION, &version);
+  if (ret != 0)
+    grub_util_error ("ioctl RAID_VERSION error: %s", strerror (errno));
+
+  if (version.major != 0 || version.minor != 90)
+    grub_util_error ("unsupported RAID version: %d.%d",
+		     version.major, version.minor);
+
+  ret = ioctl (fd, GET_ARRAY_INFO, &info);
+  if (ret != 0)
+    grub_util_error ("ioctl GET_ARRAY_INFO error: %s", strerror (errno));
+
+  devicelist = xmalloc ((info.nr_disks + 1) * sizeof (char *));
+
+  for (i = 0, j = 0; i <info.nr_disks; i++)
+    {
+      disk.number = i;
+      ret = ioctl (fd, GET_DISK_INFO, &disk);
+      if (ret != 0)
+	grub_util_error ("ioctl GET_DISK_INFO error: %s", strerror (errno));
+
+      if (disk.state & (1 << MD_DISK_ACTIVE))
+	{
+	  devicelist[j] = grub_find_device (NULL,
+					    makedev (disk.major, disk.minor));
+	  j++;
+	}
+    }
+
+  devicelist[j] = NULL;
+
+  return devicelist;
+}
+
+#endif /* ! __linux__ */