Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / include / zfs / uberblock_impl.h

diff --git a/qemu/roms/u-boot/include/zfs/uberblock_impl.h b/qemu/roms/u-boot/include/zfs/uberblock_impl.h
new file mode 100644 (file)
index 0000000..e19eee5
--- /dev/null
+++ b/qemu/roms/u-boot/include/zfs/uberblock_impl.h
@@ -0,0 +1,45 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_UBERBLOCK_IMPL_H
+#define        _SYS_UBERBLOCK_IMPL_H
+
+#define UBMAX(a, b) ((a) > (b) ? (a) : (b))
+
+/*
+ * The uberblock version is incremented whenever an incompatible on-disk
+ * format change is made to the SPA, DMU, or ZAP.
+ *
+ * Note: the first two fields should never be moved.  When a storage pool
+ * is opened, the uberblock must be read off the disk before the version
+ * can be checked.     If the ub_version field is moved, we may not detect
+ * version mismatch.  If the ub_magic field is moved, applications that
+ * expect the magic number in the first word won't work.
+ */
+#define        UBERBLOCK_MAGIC         0x00bab10c              /* oo-ba-bloc!  */
+#define        UBERBLOCK_SHIFT         10                      /* up to 1K     */
+
+typedef struct uberblock {
+       uint64_t        ub_magic;       /* UBERBLOCK_MAGIC              */
+       uint64_t        ub_version;     /* ZFS_VERSION                  */
+       uint64_t        ub_txg;         /* txg of last sync             */
+       uint64_t        ub_guid_sum;    /* sum of all vdev guids        */
+       uint64_t        ub_timestamp;   /* UTC time of last sync        */
+       blkptr_t        ub_rootbp;      /* MOS objset_phys_t            */
+} uberblock_t;
+
+#define        VDEV_UBERBLOCK_SHIFT(as)        UBMAX(as, UBERBLOCK_SHIFT)
+#define        UBERBLOCK_SIZE(as)              (1ULL << VDEV_UBERBLOCK_SHIFT(as))
+
+/* Number of uberblocks that can fit in the ring at a given ashift */
+#define UBERBLOCK_COUNT(as) (VDEV_UBERBLOCK_RING >> VDEV_UBERBLOCK_SHIFT(as))
+
+#endif /* _SYS_UBERBLOCK_IMPL_H */