zfs: Add ZFS filesystem support

[karo-tx-uboot.git] / include / zfs / vdev_impl.h

diff --git a/include/zfs/vdev_impl.h b/include/zfs/vdev_impl.h
new file mode 100644 (file)
index 0000000..3aa646e
--- /dev/null
+++ b/include/zfs/vdev_impl.h
@@ -0,0 +1,70 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
+ *
+ *  This program 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/*
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_VDEV_IMPL_H
+#define        _SYS_VDEV_IMPL_H
+
+#define        VDEV_SKIP_SIZE          (8 << 10)
+#define        VDEV_BOOT_HEADER_SIZE   (8 << 10)
+#define        VDEV_PHYS_SIZE          (112 << 10)
+#define        VDEV_UBERBLOCK_RING     (128 << 10)
+
+/* ZFS boot block */
+#define        VDEV_BOOT_MAGIC         0x2f5b007b10cULL
+#define        VDEV_BOOT_VERSION       1               /* version number       */
+
+typedef struct vdev_boot_header {
+       uint64_t        vb_magic;               /* VDEV_BOOT_MAGIC      */
+       uint64_t        vb_version;             /* VDEV_BOOT_VERSION    */
+       uint64_t        vb_offset;              /* start offset (bytes) */
+       uint64_t        vb_size;                /* size (bytes)         */
+       char            vb_pad[VDEV_BOOT_HEADER_SIZE - 4 * sizeof(uint64_t)];
+} vdev_boot_header_t;
+
+typedef struct vdev_phys {
+       char            vp_nvlist[VDEV_PHYS_SIZE - sizeof(zio_eck_t)];
+       zio_eck_t       vp_zbt;
+} vdev_phys_t;
+
+typedef struct vdev_label {
+       char            vl_pad[VDEV_SKIP_SIZE];                 /*   8K */
+       vdev_boot_header_t vl_boot_header;                      /*   8K */
+       vdev_phys_t     vl_vdev_phys;                           /* 112K */
+       char            vl_uberblock[VDEV_UBERBLOCK_RING];      /* 128K */
+} vdev_label_t;                                                        /* 256K total */
+
+/*
+ * Size and offset of embedded boot loader region on each label.
+ * The total size of the first two labels plus the boot area is 4MB.
+ */
+#define        VDEV_BOOT_OFFSET        (2 * sizeof(vdev_label_t))
+#define        VDEV_BOOT_SIZE          (7ULL << 19)                    /* 3.5M */
+
+/*
+ * Size of label regions at the start and end of each leaf device.
+ */
+#define        VDEV_LABEL_START_SIZE   (2 * sizeof(vdev_label_t) + VDEV_BOOT_SIZE)
+#define        VDEV_LABEL_END_SIZE     (2 * sizeof(vdev_label_t))
+#define        VDEV_LABELS             4
+
+#endif /* _SYS_VDEV_IMPL_H */