zfs: Add ZFS filesystem support

U-Boot port is based on sources forked from GRUB-0.97 by Sun in 2004,
which can be found here:
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/grub/grub-0.97/stage2/zfs-include/zfs.h

Released by Sun for GRUB under the license:
  *  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.

GRUB official releases include ZFS in version:
ftp://alpha.gnu.org/gnu/grub/grub-1.99~rc1.tar.gz

And patched against GRUB Bazaar repository for ashift fixes (4KB HDDs)
more conveniently found at github:
https://github.com/pendor/grub-zfs/commit/e7b6ef3ac3b9685ac4c394c897b1d4221b7381f1

Signed-off-by: Jorgen Lundman <lundman@lundman.net>

1 files changed, 122 insertions, 0 deletions

diff --git a/include/zfs/zfs.h b/include/zfs/zfs.h
new file mode 100644
index 000000000..319ee6abc
--- /dev/null
+++ b/include/zfs/zfs.h
@@ -0,0 +1,122 @@
+/*
+ *  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 (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef	GRUB_ZFS_HEADER
+#define	GRUB_ZFS_HEADER 1
+
+
+/*
+ * On-disk version number.
+ */
+#define	SPA_VERSION			28ULL
+
+/*
+ * The following are configuration names used in the nvlist describing a pool's
+ * configuration.
+ */
+#define	ZPOOL_CONFIG_VERSION		"version"
+#define	ZPOOL_CONFIG_POOL_NAME		"name"
+#define	ZPOOL_CONFIG_POOL_STATE		"state"
+#define	ZPOOL_CONFIG_POOL_TXG		"txg"
+#define	ZPOOL_CONFIG_POOL_GUID		"pool_guid"
+#define	ZPOOL_CONFIG_CREATE_TXG		"create_txg"
+#define	ZPOOL_CONFIG_TOP_GUID		"top_guid"
+#define	ZPOOL_CONFIG_VDEV_TREE		"vdev_tree"
+#define	ZPOOL_CONFIG_TYPE		"type"
+#define	ZPOOL_CONFIG_CHILDREN		"children"
+#define	ZPOOL_CONFIG_ID			"id"
+#define	ZPOOL_CONFIG_GUID		"guid"
+#define	ZPOOL_CONFIG_PATH		"path"
+#define	ZPOOL_CONFIG_DEVID		"devid"
+#define	ZPOOL_CONFIG_METASLAB_ARRAY	"metaslab_array"
+#define	ZPOOL_CONFIG_METASLAB_SHIFT	"metaslab_shift"
+#define	ZPOOL_CONFIG_ASHIFT		"ashift"
+#define	ZPOOL_CONFIG_ASIZE		"asize"
+#define	ZPOOL_CONFIG_DTL		"DTL"
+#define	ZPOOL_CONFIG_STATS		"stats"
+#define	ZPOOL_CONFIG_WHOLE_DISK		"whole_disk"
+#define	ZPOOL_CONFIG_ERRCOUNT		"error_count"
+#define	ZPOOL_CONFIG_NOT_PRESENT	"not_present"
+#define	ZPOOL_CONFIG_SPARES		"spares"
+#define	ZPOOL_CONFIG_IS_SPARE		"is_spare"
+#define	ZPOOL_CONFIG_NPARITY		"nparity"
+#define	ZPOOL_CONFIG_PHYS_PATH		"phys_path"
+#define	ZPOOL_CONFIG_L2CACHE		"l2cache"
+#define	ZPOOL_CONFIG_HOLE_ARRAY		"hole_array"
+#define	ZPOOL_CONFIG_VDEV_CHILDREN	"vdev_children"
+#define	ZPOOL_CONFIG_IS_HOLE		"is_hole"
+#define	ZPOOL_CONFIG_DDT_HISTOGRAM	"ddt_histogram"
+#define	ZPOOL_CONFIG_DDT_OBJ_STATS	"ddt_object_stats"
+#define	ZPOOL_CONFIG_DDT_STATS		"ddt_stats"
+/*
+ * The persistent vdev state is stored as separate values rather than a single
+ * 'vdev_state' entry.  This is because a device can be in multiple states, such
+ * as offline and degraded.
+ */
+#define	ZPOOL_CONFIG_OFFLINE		"offline"
+#define	ZPOOL_CONFIG_FAULTED		"faulted"
+#define	ZPOOL_CONFIG_DEGRADED		"degraded"
+#define	ZPOOL_CONFIG_REMOVED		"removed"
+
+#define	VDEV_TYPE_ROOT			"root"
+#define	VDEV_TYPE_MIRROR		"mirror"
+#define	VDEV_TYPE_REPLACING		"replacing"
+#define	VDEV_TYPE_RAIDZ			"raidz"
+#define	VDEV_TYPE_DISK			"disk"
+#define	VDEV_TYPE_FILE			"file"
+#define	VDEV_TYPE_MISSING		"missing"
+#define	VDEV_TYPE_HOLE			"hole"
+#define	VDEV_TYPE_SPARE			"spare"
+#define	VDEV_TYPE_L2CACHE		"l2cache"
+
+/*
+ * pool state.  The following states are written to disk as part of the normal
+ * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE, L2CACHE.  The remaining
+ * states are software abstractions used at various levels to communicate pool
+ * state.
+ */
+typedef enum pool_state {
+	POOL_STATE_ACTIVE = 0,		/* In active use		*/
+	POOL_STATE_EXPORTED,		/* Explicitly exported		*/
+	POOL_STATE_DESTROYED,		/* Explicitly destroyed		*/
+	POOL_STATE_SPARE,		/* Reserved for hot spare use	*/
+	POOL_STATE_L2CACHE,		/* Level 2 ARC device		*/
+	POOL_STATE_UNINITIALIZED,	/* Internal spa_t state		*/
+	POOL_STATE_UNAVAIL,		/* Internal libzfs state	*/
+	POOL_STATE_POTENTIALLY_ACTIVE	/* Internal libzfs state	*/
+} pool_state_t;
+
+struct zfs_data;
+
+int zfs_fetch_nvlist(device_t dev, char **nvlist);
+int zfs_getmdnobj(device_t dev, const char *fsfilename,
+			       uint64_t *mdnobj);
+
+char *zfs_nvlist_lookup_string(char *nvlist, char *name);
+char *zfs_nvlist_lookup_nvlist(char *nvlist, char *name);
+int zfs_nvlist_lookup_uint64(char *nvlist, char *name,
+				   uint64_t *out);
+char *zfs_nvlist_lookup_nvlist_array(char *nvlist, char *name,
+					   size_t index);
+int zfs_nvlist_lookup_nvlist_array_get_nelm(char *nvlist, char *name);
+
+#endif	/* ! GRUB_ZFS_HEADER */