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>
diff --git a/include/zfs/zfs.h b/include/zfs/zfs.h
new file mode 100644
index 0000000..319ee6a
--- /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 */