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* 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, 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* lustre/include/lustre_disk.h
*
* Lustre disk format definitions.
*
* Author: Nathan Rutman <nathan@clusterfs.com>
*/
#ifndef _LUSTRE_DISK_H
#define _LUSTRE_DISK_H
/** \defgroup disk disk
*
* @{
*/
#include "../../include/linux/libcfs/libcfs.h"
#include "../../include/linux/lnet/types.h"
#include <linux/backing-dev.h>
/****************** 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
/****************** mount command *********************/
/* The lmd is only used internally by Lustre; mount simply passes
* everything as string options
*/
#define LMD_MAGIC 0xbdacbd03
#define LMD_PARAMS_MAXLEN 4096
/* gleaned from the mount command - no persistent info here */
struct lustre_mount_data {
__u32 lmd_magic;
__u32 lmd_flags; /* lustre mount flags */
int lmd_mgs_failnodes; /* mgs failover node count */
int lmd_exclude_count;
int lmd_recovery_time_soft;
int lmd_recovery_time_hard;
char *lmd_dev; /* device name */
char *lmd_profile; /* client only */
char *lmd_mgssec; /* sptlrpc flavor to mgs */
char *lmd_opts; /* lustre mount options (as opposed to
* _device_ mount options)
*/
char *lmd_params; /* lustre params */
__u32 *lmd_exclude; /* array of OSTs to ignore */
char *lmd_mgs; /* MGS nid */
char *lmd_osd_type; /* OSD type */
};
#define LMD_FLG_SERVER 0x0001 /* Mounting a server */
#define LMD_FLG_CLIENT 0x0002 /* Mounting a client */
#define LMD_FLG_ABORT_RECOV 0x0008 /* Abort recovery */
#define LMD_FLG_NOSVC 0x0010 /* Only start MGS/MGC for servers,
* no other services
*/
#define LMD_FLG_NOMGS 0x0020 /* Only start target for servers,
* reusing existing MGS services
*/
#define LMD_FLG_WRITECONF 0x0040 /* Rewrite config log */
#define LMD_FLG_NOIR 0x0080 /* NO imperative recovery */
#define LMD_FLG_NOSCRUB 0x0100 /* Do not trigger scrub automatically */
#define LMD_FLG_MGS 0x0200 /* Also start MGS along with server */
#define LMD_FLG_IAM 0x0400 /* IAM dir */
#define LMD_FLG_NO_PRIMNODE 0x0800 /* all nodes are service nodes */
#define LMD_FLG_VIRGIN 0x1000 /* the service registers first time */
#define LMD_FLG_UPDATE 0x2000 /* update parameters */
#define LMD_FLG_HSM 0x4000 /* Start coordinator */
#define lmd_is_client(x) ((x)->lmd_flags & LMD_FLG_CLIENT)
/****************** last_rcvd file *********************/
/** version recovery epoch */
#define LR_EPOCH_BITS 32
#define lr_epoch(a) ((a) >> LR_EPOCH_BITS)
#define LR_EXPIRE_INTERVALS 16 /**< number of intervals to track transno */
#define ENOENT_VERSION 1 /** 'virtual' version of non-existent object */
/****************** superblock additional info *********************/
struct ll_sb_info;
struct lustre_sb_info {
int lsi_flags;
struct obd_device *lsi_mgc; /* mgc obd */
struct lustre_mount_data *lsi_lmd; /* mount command info */
struct ll_sb_info *lsi_llsbi; /* add'l client sbi info */
struct dt_device *lsi_dt_dev; /* dt device to access disk fs*/
atomic_t lsi_mounts; /* references to the srv_mnt */
char lsi_svname[MTI_NAME_MAXLEN];
char lsi_osd_obdname[64];
char lsi_osd_uuid[64];
struct obd_export *lsi_osd_exp;
char lsi_osd_type[16];
char lsi_fstype[16];
struct backing_dev_info lsi_bdi; /* each client mountpoint needs
* own backing_dev_info
*/
};
#define LSI_UMOUNT_FAILOVER 0x00200000
#define LSI_BDI_INITIALIZED 0x00400000
#define s2lsi(sb) ((struct lustre_sb_info *)((sb)->s_fs_info))
#define s2lsi_nocast(sb) ((sb)->s_fs_info)
#define get_profile_name(sb) (s2lsi(sb)->lsi_lmd->lmd_profile)
#define get_mount_flags(sb) (s2lsi(sb)->lsi_lmd->lmd_flags)
#define get_mntdev_name(sb) (s2lsi(sb)->lsi_lmd->lmd_dev)
/****************** mount lookup info *********************/
struct lustre_mount_info {
char *lmi_name;
struct super_block *lmi_sb;
struct list_head lmi_list_chain;
};
/****************** prototypes *********************/
/* obd_mount.c */
int lustre_start_mgc(struct super_block *sb);
void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb,
struct vfsmount *mnt));
void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb));
int lustre_common_put_super(struct super_block *sb);
int mgc_fsname2resid(char *fsname, struct ldlm_res_id *res_id, int type);
/** @} disk */
#endif /* _LUSTRE_DISK_H */
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