+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2016, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * uapi/linux/lustre_disk.h
+ *
+ * Lustre disk format definitions.
+ *
+ * Author: Nathan Rutman <nathan.rutman@seagate.com>
+ */
+
+#ifndef _UAPI_LUSTRE_DISK_H
+#define _UAPI_LUSTRE_DISK_H
+
+/** \defgroup disk disk
+ *
+ * @{
+ */
+#include <linux/types.h>
+
+/****************** on-disk files ********************/
+
+#define MDT_LOGS_DIR "LOGS" /* COMPAT_146 */
+#define MOUNT_CONFIGS_DIR "CONFIGS"
+#define CONFIGS_FILE "mountdata"
+/** Persistent mount data are stored on the disk in this file. */
+#define MOUNT_DATA_FILE MOUNT_CONFIGS_DIR"/"CONFIGS_FILE
+#define LAST_RCVD "last_rcvd"
+#define REPLY_DATA "reply_data"
+#define LOV_OBJID "lov_objid"
+#define LOV_OBJSEQ "lov_objseq"
+#define HEALTH_CHECK "health_check"
+#define CAPA_KEYS "capa_keys"
+#define CHANGELOG_USERS "changelog_users"
+#define MGS_NIDTBL_DIR "NIDTBL_VERSIONS"
+#define QMT_DIR "quota_master"
+#define QSD_DIR "quota_slave"
+#define HSM_ACTIONS "hsm_actions"
+#define LFSCK_DIR "LFSCK"
+#define LFSCK_BOOKMARK "lfsck_bookmark"
+#define LFSCK_LAYOUT "lfsck_layout"
+#define LFSCK_NAMESPACE "lfsck_namespace"
+
+/****************** persistent mount data *********************/
+
+#define LDD_F_SV_TYPE_MDT 0x0001
+#define LDD_F_SV_TYPE_OST 0x0002
+#define LDD_F_SV_TYPE_MGS 0x0004
+#define LDD_F_SV_TYPE_MASK (LDD_F_SV_TYPE_MDT | \
+ LDD_F_SV_TYPE_OST | \
+ LDD_F_SV_TYPE_MGS)
+#define LDD_F_SV_ALL 0x0008
+/** need an index assignment */
+#define LDD_F_NEED_INDEX 0x0010
+/** never registered */
+#define LDD_F_VIRGIN 0x0020
+/** update the config logs for this server */
+#define LDD_F_UPDATE 0x0040
+/** rewrite the LDD */
+#define LDD_F_REWRITE_LDD 0x0080
+/** regenerate config logs for this fs or server */
+#define LDD_F_WRITECONF 0x0100
+/** COMPAT_14 */
+#define LDD_F_UPGRADE14 0x0200
+/** process as lctl conf_param */
+#define LDD_F_PARAM 0x0400
+/** all nodes are specified as service nodes */
+#define LDD_F_NO_PRIMNODE 0x1000
+/** IR enable flag */
+#define LDD_F_IR_CAPABLE 0x2000
+/** the MGS refused to register the target. */
+#define LDD_F_ERROR 0x4000
+/** process at lctl conf_param */
+#define LDD_F_PARAM2 0x8000
+
+#define LDD_MAGIC 0x1dd00001
+
+#define XATTR_TARGET_RENAME "trusted.rename_tgt"
+
+enum ldd_mount_type {
+ LDD_MT_EXT3 = 0,
+ LDD_MT_LDISKFS,
+ LDD_MT_SMFS,
+ LDD_MT_REISERFS,
+ LDD_MT_LDISKFS2,
+ LDD_MT_ZFS,
+ LDD_MT_LAST
+};
+
+/* On-disk configuration file. In host-endian order. */
+struct lustre_disk_data {
+ __u32 ldd_magic;
+ __u32 ldd_feature_compat; /* compatible feature flags */
+ __u32 ldd_feature_rocompat; /* read-only compatible feature flags */
+ __u32 ldd_feature_incompat; /* incompatible feature flags */
+
+ __u32 ldd_config_ver; /* config rewrite count - not used */
+ __u32 ldd_flags; /* LDD_SV_TYPE */
+ __u32 ldd_svindex; /* server index (0001), must match
+ * svname
+ */
+ __u32 ldd_mount_type; /* target fs type LDD_MT_* */
+ char ldd_fsname[64]; /* filesystem this server is part of,
+ * MTI_NAME_MAXLEN
+ */
+ char ldd_svname[64]; /* this server's name (lustre-mdt0001)*/
+ __u8 ldd_uuid[40]; /* server UUID (COMPAT_146) */
+
+ char ldd_userdata[1024 - 200]; /* arbitrary user string '200' */
+ __u8 ldd_padding[4096 - 1024]; /* 1024 */
+ char ldd_mount_opts[4096]; /* target fs mount opts '4096' */
+ char ldd_params[4096]; /* key=value pairs '8192' */
+};
+
+/****************** last_rcvd file *********************/
+
+#define LR_EXPIRE_INTERVALS 16 /**< number of intervals to track transno */
+#define ENOENT_VERSION 1 /** 'virtual' version of non-existent object */
+
+#define LR_SERVER_SIZE 512
+#define LR_CLIENT_START 8192
+#define LR_CLIENT_SIZE 128
+#if LR_CLIENT_START < LR_SERVER_SIZE
+#error "Can't have LR_CLIENT_START < LR_SERVER_SIZE"
+#endif
+
+/*
+ * Data stored per server at the head of the last_rcvd file. In le32 order.
+ */
+struct lr_server_data {
+ __u8 lsd_uuid[40]; /* server UUID */
+ __u64 lsd_last_transno; /* last completed transaction ID */
+ __u64 lsd_compat14; /* reserved - compat with old last_rcvd */
+ __u64 lsd_mount_count; /* incarnation number */
+ __u32 lsd_feature_compat; /* compatible feature flags */
+ __u32 lsd_feature_rocompat;/* read-only compatible feature flags */
+ __u32 lsd_feature_incompat;/* incompatible feature flags */
+ __u32 lsd_server_size; /* size of server data area */
+ __u32 lsd_client_start; /* start of per-client data area */
+ __u16 lsd_client_size; /* size of per-client data area */
+ __u16 lsd_subdir_count; /* number of subdirectories for objects */
+ __u64 lsd_catalog_oid; /* recovery catalog object id */
+ __u32 lsd_catalog_ogen; /* recovery catalog inode generation */
+ __u8 lsd_peeruuid[40]; /* UUID of MDS associated with this OST */
+ __u32 lsd_osd_index; /* index number of OST in LOV */
+ __u32 lsd_padding1; /* was lsd_mdt_index, unused in 2.4.0 */
+ __u32 lsd_start_epoch; /* VBR: start epoch from last boot */
+ /** transaction values since lsd_trans_table_time */
+ __u64 lsd_trans_table[LR_EXPIRE_INTERVALS];
+ /** start point of transno table below */
+ __u32 lsd_trans_table_time; /* time of first slot in table above */
+ __u32 lsd_expire_intervals; /* LR_EXPIRE_INTERVALS */
+ __u8 lsd_padding[LR_SERVER_SIZE - 288];
+};
+
+/* Data stored per client in the last_rcvd file. In le32 order. */
+struct lsd_client_data {
+ __u8 lcd_uuid[40]; /* client UUID */
+ __u64 lcd_last_transno; /* last completed transaction ID */
+ __u64 lcd_last_xid; /* xid for the last transaction */
+ __u32 lcd_last_result; /* result from last RPC */
+ __u32 lcd_last_data; /* per-op data (disposition for
+ * open &c.)
+ */
+ /* for MDS_CLOSE requests */
+ __u64 lcd_last_close_transno; /* last completed transaction ID */
+ __u64 lcd_last_close_xid; /* xid for the last transaction */
+ __u32 lcd_last_close_result; /* result from last RPC */
+ __u32 lcd_last_close_data; /* per-op data */
+ /* VBR: last versions */
+ __u64 lcd_pre_versions[4];
+ __u32 lcd_last_epoch;
+ /* generation counter of client slot in last_rcvd */
+ __u32 lcd_generation;
+ __u8 lcd_padding[LR_CLIENT_SIZE - 128];
+};
+
+/* Data stored in each slot of the reply_data file.
+ *
+ * The lrd_client_gen field is assigned with lcd_generation value
+ * to allow identify which client the reply data belongs to.
+ */
+struct lsd_reply_data {
+ __u64 lrd_transno; /* transaction number */
+ __u64 lrd_xid; /* transmission id */
+ __u64 lrd_data; /* per-operation data */
+ __u32 lrd_result; /* request result */
+ __u32 lrd_client_gen; /* client generation */
+};
+
+/* Header of the reply_data file */
+#define LRH_MAGIC 0xbdabda01
+struct lsd_reply_header {
+ __u32 lrh_magic;
+ __u32 lrh_header_size;
+ __u32 lrh_reply_size;
+ __u8 lrh_pad[sizeof(struct lsd_reply_data) - 12];
+};
+
+/** @} disk */
+
+#endif /* _UAPI_LUSTRE_DISK_H */