drivers/staging/lustre/lustre/include/lustre_lib.h - nest-learning-thermostat/5.7.1/linux-imx-ul - Git at Google

 /*
  * 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.sun.com/software/products/lustre/docs/GPLv2.pdf
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  * 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_lib.h
  *
  * Basic Lustre library routines.
  */

 #ifndef _LUSTRE_LIB_H
 #define _LUSTRE_LIB_H

 /** \defgroup lib lib
  *
  * @{
  */

 #include <linux/sched.h>
 #include <linux/signal.h>
 #include <linux/types.h>
 #include "../../include/linux/libcfs/libcfs.h"
 #include "lustre/lustre_idl.h"
 #include "lustre_ver.h"
 #include "lustre_cfg.h"

 /* target.c */
 struct kstatfs;
 struct ptlrpc_request;
 struct obd_export;
 struct lu_target;
 struct l_wait_info;
 #include "lustre_ha.h"
 #include "lustre_net.h"

 #define LI_POISON 0x5a5a5a5a
 #if BITS_PER_LONG > 32
 # define LL_POISON 0x5a5a5a5a5a5a5a5aL
 #else
 # define LL_POISON 0x5a5a5a5aL
 #endif
 #define LP_POISON ((void *)LL_POISON)

 int target_pack_pool_reply(struct ptlrpc_request *req);
 int do_set_info_async(struct obd_import *imp,
 		      int opcode, int version,
 		      u32 keylen, void *key,
 		      u32 vallen, void *val,
 		      struct ptlrpc_request_set *set);

 #define OBD_RECOVERY_MAX_TIME (obd_timeout * 18) /* b13079 */
 #define OBD_MAX_IOCTL_BUFFER CONFIG_LUSTRE_OBD_MAX_IOCTL_BUFFER

 void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id);

 /* client.c */

 int client_sanobd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg);
 struct client_obd *client_conn2cli(struct lustre_handle *conn);

 struct md_open_data;
 struct obd_client_handle {
 	struct lustre_handle	 och_fh;
 	struct lu_fid		 och_fid;
 	struct md_open_data	*och_mod;
 	struct lustre_handle	 och_lease_handle; /* open lock for lease */
 	__u32			 och_magic;
 	fmode_t			 och_flags;
 };
 #define OBD_CLIENT_HANDLE_MAGIC 0xd15ea5ed

 /* statfs_pack.c */
 void statfs_pack(struct obd_statfs *osfs, struct kstatfs *sfs);
 void statfs_unpack(struct kstatfs *sfs, struct obd_statfs *osfs);

 /*
  * For md echo client
  */
 enum md_echo_cmd {
 	ECHO_MD_CREATE       = 1, /* Open/Create file on MDT */
 	ECHO_MD_MKDIR	= 2, /* Mkdir on MDT */
 	ECHO_MD_DESTROY      = 3, /* Unlink file on MDT */
 	ECHO_MD_RMDIR	= 4, /* Rmdir on MDT */
 	ECHO_MD_LOOKUP       = 5, /* Lookup on MDT */
 	ECHO_MD_GETATTR      = 6, /* Getattr on MDT */
 	ECHO_MD_SETATTR      = 7, /* Setattr on MDT */
 	ECHO_MD_ALLOC_FID    = 8, /* Get FIDs from MDT */
 };

 /*
  *   OBD IOCTLS
  */
 #define OBD_IOCTL_VERSION 0x00010004

 struct obd_ioctl_data {
 	__u32 ioc_len;
 	__u32 ioc_version;

 	union {
 		__u64 ioc_cookie;
 		__u64 ioc_u64_1;
 	};
 	union {
 		__u32 ioc_conn1;
 		__u32 ioc_u32_1;
 	};
 	union {
 		__u32 ioc_conn2;
 		__u32 ioc_u32_2;
 	};

 	struct obdo ioc_obdo1;
 	struct obdo ioc_obdo2;

 	u64	 ioc_count;
 	u64	 ioc_offset;
 	__u32    ioc_dev;
 	__u32    ioc_command;

 	__u64 ioc_nid;
 	__u32 ioc_nal;
 	__u32 ioc_type;

 	/* buffers the kernel will treat as user pointers */
 	__u32  ioc_plen1;
 	char  *ioc_pbuf1;
 	__u32  ioc_plen2;
 	char  *ioc_pbuf2;

 	/* inline buffers for various arguments */
 	__u32  ioc_inllen1;
 	char  *ioc_inlbuf1;
 	__u32  ioc_inllen2;
 	char  *ioc_inlbuf2;
 	__u32  ioc_inllen3;
 	char  *ioc_inlbuf3;
 	__u32  ioc_inllen4;
 	char  *ioc_inlbuf4;

 	char    ioc_bulk[0];
 };

 struct obd_ioctl_hdr {
 	__u32 ioc_len;
 	__u32 ioc_version;
 };

 static inline int obd_ioctl_packlen(struct obd_ioctl_data *data)
 {
 	int len = cfs_size_round(sizeof(struct obd_ioctl_data));
 	len += cfs_size_round(data->ioc_inllen1);
 	len += cfs_size_round(data->ioc_inllen2);
 	len += cfs_size_round(data->ioc_inllen3);
 	len += cfs_size_round(data->ioc_inllen4);
 	return len;
 }


 static inline int obd_ioctl_is_invalid(struct obd_ioctl_data *data)
 {
 	if (data->ioc_len > OBD_MAX_IOCTL_BUFFER) {
 		CERROR("OBD ioctl: ioc_len larger than %d\n",
 		       OBD_MAX_IOCTL_BUFFER);
 		return 1;
 	}
 	if (data->ioc_inllen1 > OBD_MAX_IOCTL_BUFFER) {
 		CERROR("OBD ioctl: ioc_inllen1 larger than ioc_len\n");
 		return 1;
 	}
 	if (data->ioc_inllen2 > OBD_MAX_IOCTL_BUFFER) {
 		CERROR("OBD ioctl: ioc_inllen2 larger than ioc_len\n");
 		return 1;
 	}
 	if (data->ioc_inllen3 > OBD_MAX_IOCTL_BUFFER) {
 		CERROR("OBD ioctl: ioc_inllen3 larger than ioc_len\n");
 		return 1;
 	}
 	if (data->ioc_inllen4 > OBD_MAX_IOCTL_BUFFER) {
 		CERROR("OBD ioctl: ioc_inllen4 larger than ioc_len\n");
 		return 1;
 	}
 	if (data->ioc_inlbuf1 && !data->ioc_inllen1) {
 		CERROR("OBD ioctl: inlbuf1 pointer but 0 length\n");
 		return 1;
 	}
 	if (data->ioc_inlbuf2 && !data->ioc_inllen2) {
 		CERROR("OBD ioctl: inlbuf2 pointer but 0 length\n");
 		return 1;
 	}
 	if (data->ioc_inlbuf3 && !data->ioc_inllen3) {
 		CERROR("OBD ioctl: inlbuf3 pointer but 0 length\n");
 		return 1;
 	}
 	if (data->ioc_inlbuf4 && !data->ioc_inllen4) {
 		CERROR("OBD ioctl: inlbuf4 pointer but 0 length\n");
 		return 1;
 	}
 	if (data->ioc_pbuf1 && !data->ioc_plen1) {
 		CERROR("OBD ioctl: pbuf1 pointer but 0 length\n");
 		return 1;
 	}
 	if (data->ioc_pbuf2 && !data->ioc_plen2) {
 		CERROR("OBD ioctl: pbuf2 pointer but 0 length\n");
 		return 1;
 	}
 	if (data->ioc_plen1 && !data->ioc_pbuf1) {
 		CERROR("OBD ioctl: plen1 set but NULL pointer\n");
 		return 1;
 	}
 	if (data->ioc_plen2 && !data->ioc_pbuf2) {
 		CERROR("OBD ioctl: plen2 set but NULL pointer\n");
 		return 1;
 	}
 	if (obd_ioctl_packlen(data) > data->ioc_len) {
 		CERROR("OBD ioctl: packlen exceeds ioc_len (%d > %d)\n",
 		       obd_ioctl_packlen(data), data->ioc_len);
 		return 1;
 	}
 	return 0;
 }


 #include "obd_support.h"

 /* function defined in lustre/obdclass/<platform>/<platform>-module.c */
 int obd_ioctl_getdata(char **buf, int *len, void *arg);
 int obd_ioctl_popdata(void *arg, void *data, int len);

 static inline void obd_ioctl_freedata(char *buf, int len)
 {
 	OBD_FREE_LARGE(buf, len);
 	return;
 }

 /*
  * BSD ioctl description:
  * #define IOC_V1       _IOR(g, n1, long)
  * #define IOC_V2       _IOW(g, n2, long)
  *
  * ioctl(f, IOC_V1, arg);
  * arg will be treated as a long value,
  *
  * ioctl(f, IOC_V2, arg)
  * arg will be treated as a pointer, bsd will call
  * copyin(buf, arg, sizeof(long))
  *
  * To make BSD ioctl handles argument correctly and simplely,
  * we change _IOR to _IOWR so BSD will copyin obd_ioctl_data
  * for us. Does this change affect Linux?  (XXX Liang)
  */
 #define OBD_IOC_DATA_TYPE long

 #define OBD_IOC_CREATE		 _IOWR('f', 101, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_DESTROY		_IOW ('f', 104, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_PREALLOCATE	    _IOWR('f', 105, OBD_IOC_DATA_TYPE)

 #define OBD_IOC_SETATTR		_IOW ('f', 107, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_GETATTR		_IOWR ('f', 108, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_READ		   _IOWR('f', 109, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_WRITE		  _IOWR('f', 110, OBD_IOC_DATA_TYPE)


 #define OBD_IOC_STATFS		 _IOWR('f', 113, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_SYNC		   _IOW ('f', 114, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_READ2		  _IOWR('f', 115, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_FORMAT		 _IOWR('f', 116, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_PARTITION	      _IOWR('f', 117, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_COPY		   _IOWR('f', 120, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_MIGR		   _IOWR('f', 121, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_PUNCH		  _IOWR('f', 122, OBD_IOC_DATA_TYPE)

 #define OBD_IOC_MODULE_DEBUG	   _IOWR('f', 124, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_BRW_READ	       _IOWR('f', 125, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_BRW_WRITE	      _IOWR('f', 126, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_NAME2DEV	       _IOWR('f', 127, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_UUID2DEV	       _IOWR('f', 130, OBD_IOC_DATA_TYPE)

 #define OBD_IOC_GETNAME		_IOWR('f', 131, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_GETMDNAME	      _IOR('f', 131, char[MAX_OBD_NAME])
 #define OBD_IOC_GETDTNAME	       OBD_IOC_GETNAME

 #define OBD_IOC_LOV_GET_CONFIG	 _IOWR('f', 132, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_CLIENT_RECOVER	 _IOW ('f', 133, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_PING_TARGET	    _IOW ('f', 136, OBD_IOC_DATA_TYPE)

 #define OBD_IOC_DEC_FS_USE_COUNT       _IO  ('f', 139      )
 #define OBD_IOC_NO_TRANSNO	     _IOW ('f', 140, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_SET_READONLY	   _IOW ('f', 141, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_ABORT_RECOVERY	 _IOR ('f', 142, OBD_IOC_DATA_TYPE)

 #define OBD_IOC_ROOT_SQUASH	    _IOWR('f', 143, OBD_IOC_DATA_TYPE)

 #define OBD_GET_VERSION		_IOWR ('f', 144, OBD_IOC_DATA_TYPE)

 #define OBD_IOC_GSS_SUPPORT	    _IOWR('f', 145, OBD_IOC_DATA_TYPE)

 #define OBD_IOC_CLOSE_UUID	     _IOWR ('f', 147, OBD_IOC_DATA_TYPE)

 #define OBD_IOC_CHANGELOG_SEND	 _IOW ('f', 148, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_GETDEVICE	      _IOWR ('f', 149, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_FID2PATH	       _IOWR ('f', 150, OBD_IOC_DATA_TYPE)
 /* see also <lustre/lustre_user.h> for ioctls 151-153 */
 /* OBD_IOC_LOV_SETSTRIPE: See also LL_IOC_LOV_SETSTRIPE */
 #define OBD_IOC_LOV_SETSTRIPE	  _IOW ('f', 154, OBD_IOC_DATA_TYPE)
 /* OBD_IOC_LOV_GETSTRIPE: See also LL_IOC_LOV_GETSTRIPE */
 #define OBD_IOC_LOV_GETSTRIPE	  _IOW ('f', 155, OBD_IOC_DATA_TYPE)
 /* OBD_IOC_LOV_SETEA: See also LL_IOC_LOV_SETEA */
 #define OBD_IOC_LOV_SETEA	      _IOW ('f', 156, OBD_IOC_DATA_TYPE)
 /* see <lustre/lustre_user.h> for ioctls 157-159 */
 /* OBD_IOC_QUOTACHECK: See also LL_IOC_QUOTACHECK */
 #define OBD_IOC_QUOTACHECK	     _IOW ('f', 160, int)
 /* OBD_IOC_POLL_QUOTACHECK: See also LL_IOC_POLL_QUOTACHECK */
 #define OBD_IOC_POLL_QUOTACHECK	_IOR ('f', 161, struct if_quotacheck *)
 /* OBD_IOC_QUOTACTL: See also LL_IOC_QUOTACTL */
 #define OBD_IOC_QUOTACTL	       _IOWR('f', 162, struct if_quotactl)
 /* see  also <lustre/lustre_user.h> for ioctls 163-176 */
 #define OBD_IOC_CHANGELOG_REG	  _IOW ('f', 177, struct obd_ioctl_data)
 #define OBD_IOC_CHANGELOG_DEREG	_IOW ('f', 178, struct obd_ioctl_data)
 #define OBD_IOC_CHANGELOG_CLEAR	_IOW ('f', 179, struct obd_ioctl_data)
 #define OBD_IOC_RECORD		 _IOWR('f', 180, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_ENDRECORD	      _IOWR('f', 181, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_PARSE		  _IOWR('f', 182, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_DORECORD	       _IOWR('f', 183, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_PROCESS_CFG	    _IOWR('f', 184, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_DUMP_LOG	       _IOWR('f', 185, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_CLEAR_LOG	      _IOWR('f', 186, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_PARAM		  _IOW ('f', 187, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_POOL		   _IOWR('f', 188, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_REPLACE_NIDS	   _IOWR('f', 189, OBD_IOC_DATA_TYPE)

 #define OBD_IOC_CATLOGLIST	     _IOWR('f', 190, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_LLOG_INFO	      _IOWR('f', 191, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_LLOG_PRINT	     _IOWR('f', 192, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_LLOG_CANCEL	    _IOWR('f', 193, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_LLOG_REMOVE	    _IOWR('f', 194, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_LLOG_CHECK	     _IOWR('f', 195, OBD_IOC_DATA_TYPE)
 /* OBD_IOC_LLOG_CATINFO is deprecated */
 #define OBD_IOC_LLOG_CATINFO	   _IOWR('f', 196, OBD_IOC_DATA_TYPE)

 #define ECHO_IOC_GET_STRIPE	    _IOWR('f', 200, OBD_IOC_DATA_TYPE)
 #define ECHO_IOC_SET_STRIPE	    _IOWR('f', 201, OBD_IOC_DATA_TYPE)
 #define ECHO_IOC_ENQUEUE	       _IOWR('f', 202, OBD_IOC_DATA_TYPE)
 #define ECHO_IOC_CANCEL		_IOWR('f', 203, OBD_IOC_DATA_TYPE)

 #define OBD_IOC_GET_OBJ_VERSION	_IOR('f', 210, OBD_IOC_DATA_TYPE)

 /* <lustre/lustre_user.h> defines ioctl number 218-219 */
 #define OBD_IOC_GET_MNTOPT	     _IOW('f', 220, mntopt_t)

 #define OBD_IOC_ECHO_MD		_IOR('f', 221, struct obd_ioctl_data)
 #define OBD_IOC_ECHO_ALLOC_SEQ	 _IOWR('f', 222, struct obd_ioctl_data)

 #define OBD_IOC_START_LFSCK	       _IOWR('f', 230, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_STOP_LFSCK	       _IOW('f', 231, OBD_IOC_DATA_TYPE)
 #define OBD_IOC_PAUSE_LFSCK	       _IOW('f', 232, OBD_IOC_DATA_TYPE)

 /* XXX _IOWR('f', 250, long) has been defined in
  * libcfs/include/libcfs/libcfs_private.h for debug, don't use it
  */

 /* Until such time as we get_info the per-stripe maximum from the OST,
  * we define this to be 2T - 4k, which is the ext3 maxbytes. */
 #define LUSTRE_STRIPE_MAXBYTES 0x1fffffff000ULL

 /* Special values for remove LOV EA from disk */
 #define LOVEA_DELETE_VALUES(size, count, offset) (size == 0 && count == 0 && \
 						 offset == (typeof(offset))(-1))

 /* #define POISON_BULK 0 */

 /*
  * l_wait_event is a flexible sleeping function, permitting simple caller
  * configuration of interrupt and timeout sensitivity along with actions to
  * be performed in the event of either exception.
  *
  * The first form of usage looks like this:
  *
  * struct l_wait_info lwi = LWI_TIMEOUT_INTR(timeout, timeout_handler,
  *					   intr_handler, callback_data);
  * rc = l_wait_event(waitq, condition, &lwi);
  *
  * l_wait_event() makes the current process wait on 'waitq' until 'condition'
  * is TRUE or a "killable" signal (SIGTERM, SIKGILL, SIGINT) is pending.  It
  * returns 0 to signify 'condition' is TRUE, but if a signal wakes it before
  * 'condition' becomes true, it optionally calls the specified 'intr_handler'
  * if not NULL, and returns -EINTR.
  *
  * If a non-zero timeout is specified, signals are ignored until the timeout
  * has expired.  At this time, if 'timeout_handler' is not NULL it is called.
  * If it returns FALSE l_wait_event() continues to wait as described above with
  * signals enabled.  Otherwise it returns -ETIMEDOUT.
  *
  * LWI_INTR(intr_handler, callback_data) is shorthand for
  * LWI_TIMEOUT_INTR(0, NULL, intr_handler, callback_data)
  *
  * The second form of usage looks like this:
  *
  * struct l_wait_info lwi = LWI_TIMEOUT(timeout, timeout_handler);
  * rc = l_wait_event(waitq, condition, &lwi);
  *
  * This form is the same as the first except that it COMPLETELY IGNORES
  * SIGNALS.  The caller must therefore beware that if 'timeout' is zero, or if
  * 'timeout_handler' is not NULL and returns FALSE, then the ONLY thing that
  * can unblock the current process is 'condition' becoming TRUE.
  *
  * Another form of usage is:
  * struct l_wait_info lwi = LWI_TIMEOUT_INTERVAL(timeout, interval,
  *					       timeout_handler);
  * rc = l_wait_event(waitq, condition, &lwi);
  * This is the same as previous case, but condition is checked once every
  * 'interval' jiffies (if non-zero).
  *
  * Subtle synchronization point: this macro does *not* necessary takes
  * wait-queue spin-lock before returning, and, hence, following idiom is safe
  * ONLY when caller provides some external locking:
  *
  *	     Thread1			    Thread2
  *
  *   l_wait_event(&obj->wq, ....);				       (1)
  *
  *				    wake_up(&obj->wq):		 (2)
  *					 spin_lock(&q->lock);	  (2.1)
  *					 __wake_up_common(q, ...);     (2.2)
  *					 spin_unlock(&q->lock, flags); (2.3)
  *
  *   OBD_FREE_PTR(obj);						  (3)
  *
  * As l_wait_event() may "short-cut" execution and return without taking
  * wait-queue spin-lock, some additional synchronization is necessary to
  * guarantee that step (3) can begin only after (2.3) finishes.
  *
  * XXX nikita: some ptlrpc daemon threads have races of that sort.
  *
  */
 static inline int back_to_sleep(void *arg)
 {
 	return 0;
 }

 #define LWI_ON_SIGNAL_NOOP ((void (*)(void *))(-1))

 struct l_wait_info {
 	long lwi_timeout;
 	long lwi_interval;
 	int	    lwi_allow_intr;
 	int  (*lwi_on_timeout)(void *);
 	void (*lwi_on_signal)(void *);
 	void  *lwi_cb_data;
 };

 /* NB: LWI_TIMEOUT ignores signals completely */
 #define LWI_TIMEOUT(time, cb, data)	     \
 ((struct l_wait_info) {			 \
 	.lwi_timeout    = time,		 \
 	.lwi_on_timeout = cb,		   \
 	.lwi_cb_data    = data,		 \
 	.lwi_interval   = 0,		    \
 	.lwi_allow_intr = 0		     \
 })

 #define LWI_TIMEOUT_INTERVAL(time, interval, cb, data)  \
 ((struct l_wait_info) {				 \
 	.lwi_timeout    = time,			 \
 	.lwi_on_timeout = cb,			   \
 	.lwi_cb_data    = data,			 \
 	.lwi_interval   = interval,		     \
 	.lwi_allow_intr = 0			     \
 })

 #define LWI_TIMEOUT_INTR(time, time_cb, sig_cb, data)   \
 ((struct l_wait_info) {				 \
 	.lwi_timeout    = time,			 \
 	.lwi_on_timeout = time_cb,		      \
 	.lwi_on_signal  = sig_cb,		       \
 	.lwi_cb_data    = data,			 \
 	.lwi_interval   = 0,			    \
 	.lwi_allow_intr = 0			     \
 })

 #define LWI_TIMEOUT_INTR_ALL(time, time_cb, sig_cb, data)       \
 ((struct l_wait_info) {					 \
 	.lwi_timeout    = time,				 \
 	.lwi_on_timeout = time_cb,			      \
 	.lwi_on_signal  = sig_cb,			       \
 	.lwi_cb_data    = data,				 \
 	.lwi_interval   = 0,				    \
 	.lwi_allow_intr = 1				     \
 })

 #define LWI_INTR(cb, data)  LWI_TIMEOUT_INTR(0, NULL, cb, data)

 #define LUSTRE_FATAL_SIGS (sigmask(SIGKILL) | sigmask(SIGINT) |		\
 			   sigmask(SIGTERM) | sigmask(SIGQUIT) |	\
 			   sigmask(SIGALRM))


 /*
  * wait for @condition to become true, but no longer than timeout, specified
  * by @info.
  */
 #define __l_wait_event(wq, condition, info, ret, l_add_wait)		   \
 do {									   \
 	wait_queue_t __wait;						 \
 	long __timeout = info->lwi_timeout;			  \
 	sigset_t   __blocked;					      \
 	int   __allow_intr = info->lwi_allow_intr;			     \
 									       \
 	ret = 0;							       \
 	if (condition)							 \
 		break;							 \
 									       \
 	init_waitqueue_entry(&__wait, current);					    \
 	l_add_wait(&wq, &__wait);					      \
 									       \
 	/* Block all signals (just the non-fatal ones if no timeout). */       \
 	if (info->lwi_on_signal != NULL && (__timeout == 0 || __allow_intr))   \
 		__blocked = cfs_block_sigsinv(LUSTRE_FATAL_SIGS);	      \
 	else								   \
 		__blocked = cfs_block_sigsinv(0);			      \
 									       \
 	for (;;) {							     \
 		unsigned       __wstate;				       \
 									       \
 		__wstate = info->lwi_on_signal != NULL &&		      \
 			   (__timeout == 0 || __allow_intr) ?		  \
 			TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE;	       \
 									       \
 		set_current_state(TASK_INTERRUPTIBLE);		 \
 									       \
 		if (condition)						 \
 			break;						 \
 									       \
 		if (__timeout == 0) {					  \
 			schedule();						\
 		} else {						       \
 			long interval = info->lwi_interval?	  \
 					     min_t(long,	     \
 						 info->lwi_interval,__timeout):\
 					     __timeout;			\
 			long remaining = schedule_timeout(interval);\
 			__timeout = cfs_time_sub(__timeout,		    \
 					    cfs_time_sub(interval, remaining));\
 			if (__timeout == 0) {				  \
 				if (info->lwi_on_timeout == NULL ||	    \
 				    info->lwi_on_timeout(info->lwi_cb_data)) { \
 					ret = -ETIMEDOUT;		      \
 					break;				 \
 				}					      \
 				/* Take signals after the timeout expires. */  \
 				if (info->lwi_on_signal != NULL)	       \
 				    (void)cfs_block_sigsinv(LUSTRE_FATAL_SIGS);\
 			}						      \
 		}							      \
 									       \
 		if (condition)						 \
 			break;						 \
 		if (cfs_signal_pending()) {				    \
 			if (info->lwi_on_signal != NULL &&		     \
 			    (__timeout == 0 || __allow_intr)) {		\
 				if (info->lwi_on_signal != LWI_ON_SIGNAL_NOOP) \
 					info->lwi_on_signal(info->lwi_cb_data);\
 				ret = -EINTR;				  \
 				break;					 \
 			}						      \
 			/* We have to do this here because some signals */     \
 			/* are not blockable - ie from strace(1).       */     \
 			/* In these cases we want to schedule_timeout() */     \
 			/* again, because we don't want that to return  */     \
 			/* -EINTR when the RPC actually succeeded.      */     \
 			/* the recalc_sigpending() below will deliver the */     \
 			/* signal properly.			     */     \
 			cfs_clear_sigpending();				\
 		}							      \
 	}								      \
 									       \
 	cfs_restore_sigs(__blocked);					   \
 									       \
 	set_current_state(TASK_RUNNING);			       \
 	remove_wait_queue(&wq, &__wait);					   \
 } while (0)


 #define l_wait_event(wq, condition, info)		       \
 ({							      \
 	int		 __ret;			      \
 	struct l_wait_info *__info = (info);		    \
 								\
 	__l_wait_event(wq, condition, __info,		   \
 		       __ret, add_wait_queue);		   \
 	__ret;						  \
 })

 #define l_wait_event_exclusive(wq, condition, info)	     \
 ({							      \
 	int		 __ret;			      \
 	struct l_wait_info *__info = (info);		    \
 								\
 	__l_wait_event(wq, condition, __info,		   \
 		       __ret, add_wait_queue_exclusive);	 \
 	__ret;						  \
 })

 #define l_wait_event_exclusive_head(wq, condition, info)	\
 ({							      \
 	int		 __ret;			      \
 	struct l_wait_info *__info = (info);		    \
 								\
 	__l_wait_event(wq, condition, __info,		   \
 		       __ret, add_wait_queue_exclusive_head);    \
 	__ret;						  \
 })

 #define l_wait_condition(wq, condition)			 \
 ({							      \
 	struct l_wait_info lwi = { 0 };			 \
 	l_wait_event(wq, condition, &lwi);		      \
 })

 #define l_wait_condition_exclusive(wq, condition)	       \
 ({							      \
 	struct l_wait_info lwi = { 0 };			 \
 	l_wait_event_exclusive(wq, condition, &lwi);	    \
 })

 #define l_wait_condition_exclusive_head(wq, condition)	  \
 ({							      \
 	struct l_wait_info lwi = { 0 };			 \
 	l_wait_event_exclusive_head(wq, condition, &lwi);       \
 })

 #define LIBLUSTRE_CLIENT (0)

 /** @} lib */

 #endif /* _LUSTRE_LIB_H */
	/*
	* 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.sun.com/software/products/lustre/docs/GPLv2.pdf
	*
	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
	* CA 95054 USA or visit www.sun.com if you need additional information or
	* have any questions.
	*
	* 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_lib.h
	*
	* Basic Lustre library routines.
	*/

	#ifndef _LUSTRE_LIB_H
	#define _LUSTRE_LIB_H

	/** \defgroup lib lib
	*
	* @{
	*/

	#include <linux/sched.h>
	#include <linux/signal.h>
	#include <linux/types.h>
	#include "../../include/linux/libcfs/libcfs.h"
	#include "lustre/lustre_idl.h"
	#include "lustre_ver.h"
	#include "lustre_cfg.h"

	/* target.c */
	struct kstatfs;
	struct ptlrpc_request;
	struct obd_export;
	struct lu_target;
	struct l_wait_info;
	#include "lustre_ha.h"
	#include "lustre_net.h"

	#define LI_POISON 0x5a5a5a5a
	#if BITS_PER_LONG > 32
	# define LL_POISON 0x5a5a5a5a5a5a5a5aL
	#else
	# define LL_POISON 0x5a5a5a5aL
	#endif
	#define LP_POISON ((void *)LL_POISON)

	int target_pack_pool_reply(struct ptlrpc_request *req);
	int do_set_info_async(struct obd_import *imp,
	int opcode, int version,
	u32 keylen, void *key,
	u32 vallen, void *val,
	struct ptlrpc_request_set *set);

	#define OBD_RECOVERY_MAX_TIME (obd_timeout * 18) /* b13079 */
	#define OBD_MAX_IOCTL_BUFFER CONFIG_LUSTRE_OBD_MAX_IOCTL_BUFFER

	void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id);

	/* client.c */

	int client_sanobd_setup(struct obd_device obddev, struct lustre_cfg lcfg);
	struct client_obd client_conn2cli(struct lustre_handle conn);

	struct md_open_data;
	struct obd_client_handle {
	struct lustre_handle och_fh;
	struct lu_fid och_fid;
	struct md_open_data *och_mod;
	struct lustre_handle och_lease_handle; /* open lock for lease */
	__u32 och_magic;
	fmode_t och_flags;
	};
	#define OBD_CLIENT_HANDLE_MAGIC 0xd15ea5ed

	/* statfs_pack.c */
	void statfs_pack(struct obd_statfs osfs, struct kstatfs sfs);
	void statfs_unpack(struct kstatfs sfs, struct obd_statfs osfs);

	/*
	* For md echo client
	*/
	enum md_echo_cmd {
	ECHO_MD_CREATE = 1, /* Open/Create file on MDT */
	ECHO_MD_MKDIR = 2, /* Mkdir on MDT */
	ECHO_MD_DESTROY = 3, /* Unlink file on MDT */
	ECHO_MD_RMDIR = 4, /* Rmdir on MDT */
	ECHO_MD_LOOKUP = 5, /* Lookup on MDT */
	ECHO_MD_GETATTR = 6, /* Getattr on MDT */
	ECHO_MD_SETATTR = 7, /* Setattr on MDT */
	ECHO_MD_ALLOC_FID = 8, /* Get FIDs from MDT */
	};

	/*
	* OBD IOCTLS
	*/
	#define OBD_IOCTL_VERSION 0x00010004

	struct obd_ioctl_data {
	__u32 ioc_len;
	__u32 ioc_version;

	union {
	__u64 ioc_cookie;
	__u64 ioc_u64_1;
	};
	union {
	__u32 ioc_conn1;
	__u32 ioc_u32_1;
	};
	union {
	__u32 ioc_conn2;
	__u32 ioc_u32_2;
	};

	struct obdo ioc_obdo1;
	struct obdo ioc_obdo2;

	u64 ioc_count;
	u64 ioc_offset;
	__u32 ioc_dev;
	__u32 ioc_command;

	__u64 ioc_nid;
	__u32 ioc_nal;
	__u32 ioc_type;

	/* buffers the kernel will treat as user pointers */
	__u32 ioc_plen1;
	char *ioc_pbuf1;
	__u32 ioc_plen2;
	char *ioc_pbuf2;

	/* inline buffers for various arguments */
	__u32 ioc_inllen1;
	char *ioc_inlbuf1;
	__u32 ioc_inllen2;
	char *ioc_inlbuf2;
	__u32 ioc_inllen3;
	char *ioc_inlbuf3;
	__u32 ioc_inllen4;
	char *ioc_inlbuf4;

	char ioc_bulk[0];
	};

	struct obd_ioctl_hdr {
	__u32 ioc_len;
	__u32 ioc_version;
	};

	static inline int obd_ioctl_packlen(struct obd_ioctl_data *data)
	{
	int len = cfs_size_round(sizeof(struct obd_ioctl_data));
	len += cfs_size_round(data->ioc_inllen1);
	len += cfs_size_round(data->ioc_inllen2);
	len += cfs_size_round(data->ioc_inllen3);
	len += cfs_size_round(data->ioc_inllen4);
	return len;
	}


	static inline int obd_ioctl_is_invalid(struct obd_ioctl_data *data)
	{
	if (data->ioc_len > OBD_MAX_IOCTL_BUFFER) {
	CERROR("OBD ioctl: ioc_len larger than %d\n",
	OBD_MAX_IOCTL_BUFFER);
	return 1;
	}
	if (data->ioc_inllen1 > OBD_MAX_IOCTL_BUFFER) {
	CERROR("OBD ioctl: ioc_inllen1 larger than ioc_len\n");
	return 1;
	}
	if (data->ioc_inllen2 > OBD_MAX_IOCTL_BUFFER) {
	CERROR("OBD ioctl: ioc_inllen2 larger than ioc_len\n");
	return 1;
	}
	if (data->ioc_inllen3 > OBD_MAX_IOCTL_BUFFER) {
	CERROR("OBD ioctl: ioc_inllen3 larger than ioc_len\n");
	return 1;
	}
	if (data->ioc_inllen4 > OBD_MAX_IOCTL_BUFFER) {
	CERROR("OBD ioctl: ioc_inllen4 larger than ioc_len\n");
	return 1;
	}
	if (data->ioc_inlbuf1 && !data->ioc_inllen1) {
	CERROR("OBD ioctl: inlbuf1 pointer but 0 length\n");
	return 1;
	}
	if (data->ioc_inlbuf2 && !data->ioc_inllen2) {
	CERROR("OBD ioctl: inlbuf2 pointer but 0 length\n");
	return 1;
	}
	if (data->ioc_inlbuf3 && !data->ioc_inllen3) {
	CERROR("OBD ioctl: inlbuf3 pointer but 0 length\n");
	return 1;
	}
	if (data->ioc_inlbuf4 && !data->ioc_inllen4) {
	CERROR("OBD ioctl: inlbuf4 pointer but 0 length\n");
	return 1;
	}
	if (data->ioc_pbuf1 && !data->ioc_plen1) {
	CERROR("OBD ioctl: pbuf1 pointer but 0 length\n");
	return 1;
	}
	if (data->ioc_pbuf2 && !data->ioc_plen2) {
	CERROR("OBD ioctl: pbuf2 pointer but 0 length\n");
	return 1;
	}
	if (data->ioc_plen1 && !data->ioc_pbuf1) {
	CERROR("OBD ioctl: plen1 set but NULL pointer\n");
	return 1;
	}
	if (data->ioc_plen2 && !data->ioc_pbuf2) {
	CERROR("OBD ioctl: plen2 set but NULL pointer\n");
	return 1;
	}
	if (obd_ioctl_packlen(data) > data->ioc_len) {
	CERROR("OBD ioctl: packlen exceeds ioc_len (%d > %d)\n",
	obd_ioctl_packlen(data), data->ioc_len);
	return 1;
	}
	return 0;
	}


	#include "obd_support.h"

	/* function defined in lustre/obdclass/<platform>/<platform>-module.c */
	int obd_ioctl_getdata(char *buf, int len, void *arg);
	int obd_ioctl_popdata(void arg, void data, int len);

	static inline void obd_ioctl_freedata(char *buf, int len)
	{
	OBD_FREE_LARGE(buf, len);
	return;
	}

	/*
	* BSD ioctl description:
	* #define IOC_V1 _IOR(g, n1, long)
	* #define IOC_V2 _IOW(g, n2, long)
	*
	* ioctl(f, IOC_V1, arg);
	* arg will be treated as a long value,
	*
	* ioctl(f, IOC_V2, arg)
	* arg will be treated as a pointer, bsd will call
	* copyin(buf, arg, sizeof(long))
	*
	* To make BSD ioctl handles argument correctly and simplely,
	* we change _IOR to _IOWR so BSD will copyin obd_ioctl_data
	* for us. Does this change affect Linux? (XXX Liang)
	*/
	#define OBD_IOC_DATA_TYPE long

	#define OBD_IOC_CREATE _IOWR('f', 101, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_DESTROY _IOW ('f', 104, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_PREALLOCATE _IOWR('f', 105, OBD_IOC_DATA_TYPE)

	#define OBD_IOC_SETATTR _IOW ('f', 107, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_GETATTR _IOWR ('f', 108, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_READ _IOWR('f', 109, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_WRITE _IOWR('f', 110, OBD_IOC_DATA_TYPE)


	#define OBD_IOC_STATFS _IOWR('f', 113, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_SYNC _IOW ('f', 114, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_READ2 _IOWR('f', 115, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_FORMAT _IOWR('f', 116, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_PARTITION _IOWR('f', 117, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_COPY _IOWR('f', 120, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_MIGR _IOWR('f', 121, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_PUNCH _IOWR('f', 122, OBD_IOC_DATA_TYPE)

	#define OBD_IOC_MODULE_DEBUG _IOWR('f', 124, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_BRW_READ _IOWR('f', 125, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_BRW_WRITE _IOWR('f', 126, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_NAME2DEV _IOWR('f', 127, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_UUID2DEV _IOWR('f', 130, OBD_IOC_DATA_TYPE)

	#define OBD_IOC_GETNAME _IOWR('f', 131, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_GETMDNAME _IOR('f', 131, char[MAX_OBD_NAME])
	#define OBD_IOC_GETDTNAME OBD_IOC_GETNAME

	#define OBD_IOC_LOV_GET_CONFIG _IOWR('f', 132, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_CLIENT_RECOVER _IOW ('f', 133, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_PING_TARGET _IOW ('f', 136, OBD_IOC_DATA_TYPE)

	#define OBD_IOC_DEC_FS_USE_COUNT _IO ('f', 139 )
	#define OBD_IOC_NO_TRANSNO _IOW ('f', 140, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_SET_READONLY _IOW ('f', 141, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_ABORT_RECOVERY _IOR ('f', 142, OBD_IOC_DATA_TYPE)

	#define OBD_IOC_ROOT_SQUASH _IOWR('f', 143, OBD_IOC_DATA_TYPE)

	#define OBD_GET_VERSION _IOWR ('f', 144, OBD_IOC_DATA_TYPE)

	#define OBD_IOC_GSS_SUPPORT _IOWR('f', 145, OBD_IOC_DATA_TYPE)

	#define OBD_IOC_CLOSE_UUID _IOWR ('f', 147, OBD_IOC_DATA_TYPE)

	#define OBD_IOC_CHANGELOG_SEND _IOW ('f', 148, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_GETDEVICE _IOWR ('f', 149, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_FID2PATH _IOWR ('f', 150, OBD_IOC_DATA_TYPE)
	/* see also <lustre/lustre_user.h> for ioctls 151-153 */
	/* OBD_IOC_LOV_SETSTRIPE: See also LL_IOC_LOV_SETSTRIPE */
	#define OBD_IOC_LOV_SETSTRIPE _IOW ('f', 154, OBD_IOC_DATA_TYPE)
	/* OBD_IOC_LOV_GETSTRIPE: See also LL_IOC_LOV_GETSTRIPE */
	#define OBD_IOC_LOV_GETSTRIPE _IOW ('f', 155, OBD_IOC_DATA_TYPE)
	/* OBD_IOC_LOV_SETEA: See also LL_IOC_LOV_SETEA */
	#define OBD_IOC_LOV_SETEA _IOW ('f', 156, OBD_IOC_DATA_TYPE)
	/* see <lustre/lustre_user.h> for ioctls 157-159 */
	/* OBD_IOC_QUOTACHECK: See also LL_IOC_QUOTACHECK */
	#define OBD_IOC_QUOTACHECK _IOW ('f', 160, int)
	/* OBD_IOC_POLL_QUOTACHECK: See also LL_IOC_POLL_QUOTACHECK */
	#define OBD_IOC_POLL_QUOTACHECK _IOR ('f', 161, struct if_quotacheck *)
	/* OBD_IOC_QUOTACTL: See also LL_IOC_QUOTACTL */
	#define OBD_IOC_QUOTACTL _IOWR('f', 162, struct if_quotactl)
	/* see also <lustre/lustre_user.h> for ioctls 163-176 */
	#define OBD_IOC_CHANGELOG_REG _IOW ('f', 177, struct obd_ioctl_data)
	#define OBD_IOC_CHANGELOG_DEREG _IOW ('f', 178, struct obd_ioctl_data)
	#define OBD_IOC_CHANGELOG_CLEAR _IOW ('f', 179, struct obd_ioctl_data)
	#define OBD_IOC_RECORD _IOWR('f', 180, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_ENDRECORD _IOWR('f', 181, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_PARSE _IOWR('f', 182, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_DORECORD _IOWR('f', 183, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_PROCESS_CFG _IOWR('f', 184, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_DUMP_LOG _IOWR('f', 185, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_CLEAR_LOG _IOWR('f', 186, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_PARAM _IOW ('f', 187, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_POOL _IOWR('f', 188, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_REPLACE_NIDS _IOWR('f', 189, OBD_IOC_DATA_TYPE)

	#define OBD_IOC_CATLOGLIST _IOWR('f', 190, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_LLOG_INFO _IOWR('f', 191, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_LLOG_PRINT _IOWR('f', 192, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_LLOG_CANCEL _IOWR('f', 193, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_LLOG_REMOVE _IOWR('f', 194, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_LLOG_CHECK _IOWR('f', 195, OBD_IOC_DATA_TYPE)
	/* OBD_IOC_LLOG_CATINFO is deprecated */
	#define OBD_IOC_LLOG_CATINFO _IOWR('f', 196, OBD_IOC_DATA_TYPE)

	#define ECHO_IOC_GET_STRIPE _IOWR('f', 200, OBD_IOC_DATA_TYPE)
	#define ECHO_IOC_SET_STRIPE _IOWR('f', 201, OBD_IOC_DATA_TYPE)
	#define ECHO_IOC_ENQUEUE _IOWR('f', 202, OBD_IOC_DATA_TYPE)
	#define ECHO_IOC_CANCEL _IOWR('f', 203, OBD_IOC_DATA_TYPE)

	#define OBD_IOC_GET_OBJ_VERSION _IOR('f', 210, OBD_IOC_DATA_TYPE)

	/* <lustre/lustre_user.h> defines ioctl number 218-219 */
	#define OBD_IOC_GET_MNTOPT _IOW('f', 220, mntopt_t)

	#define OBD_IOC_ECHO_MD _IOR('f', 221, struct obd_ioctl_data)
	#define OBD_IOC_ECHO_ALLOC_SEQ _IOWR('f', 222, struct obd_ioctl_data)

	#define OBD_IOC_START_LFSCK _IOWR('f', 230, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_STOP_LFSCK _IOW('f', 231, OBD_IOC_DATA_TYPE)
	#define OBD_IOC_PAUSE_LFSCK _IOW('f', 232, OBD_IOC_DATA_TYPE)

	/* XXX _IOWR('f', 250, long) has been defined in
	* libcfs/include/libcfs/libcfs_private.h for debug, don't use it
	*/

	/* Until such time as we get_info the per-stripe maximum from the OST,
	* we define this to be 2T - 4k, which is the ext3 maxbytes. */
	#define LUSTRE_STRIPE_MAXBYTES 0x1fffffff000ULL

	/* Special values for remove LOV EA from disk */
	#define LOVEA_DELETE_VALUES(size, count, offset) (size == 0 && count == 0 && \
	offset == (typeof(offset))(-1))

	/* #define POISON_BULK 0 */

	/*
	* l_wait_event is a flexible sleeping function, permitting simple caller
	* configuration of interrupt and timeout sensitivity along with actions to
	* be performed in the event of either exception.
	*
	* The first form of usage looks like this:
	*
	* struct l_wait_info lwi = LWI_TIMEOUT_INTR(timeout, timeout_handler,
	* intr_handler, callback_data);
	* rc = l_wait_event(waitq, condition, &lwi);
	*
	* l_wait_event() makes the current process wait on 'waitq' until 'condition'
	* is TRUE or a "killable" signal (SIGTERM, SIKGILL, SIGINT) is pending. It
	* returns 0 to signify 'condition' is TRUE, but if a signal wakes it before
	* 'condition' becomes true, it optionally calls the specified 'intr_handler'
	* if not NULL, and returns -EINTR.
	*
	* If a non-zero timeout is specified, signals are ignored until the timeout
	* has expired. At this time, if 'timeout_handler' is not NULL it is called.
	* If it returns FALSE l_wait_event() continues to wait as described above with
	* signals enabled. Otherwise it returns -ETIMEDOUT.
	*
	* LWI_INTR(intr_handler, callback_data) is shorthand for
	* LWI_TIMEOUT_INTR(0, NULL, intr_handler, callback_data)
	*
	* The second form of usage looks like this:
	*
	* struct l_wait_info lwi = LWI_TIMEOUT(timeout, timeout_handler);
	* rc = l_wait_event(waitq, condition, &lwi);
	*
	* This form is the same as the first except that it COMPLETELY IGNORES
	* SIGNALS. The caller must therefore beware that if 'timeout' is zero, or if
	* 'timeout_handler' is not NULL and returns FALSE, then the ONLY thing that
	* can unblock the current process is 'condition' becoming TRUE.
	*
	* Another form of usage is:
	* struct l_wait_info lwi = LWI_TIMEOUT_INTERVAL(timeout, interval,
	* timeout_handler);
	* rc = l_wait_event(waitq, condition, &lwi);
	* This is the same as previous case, but condition is checked once every
	* 'interval' jiffies (if non-zero).
	*
	* Subtle synchronization point: this macro does not necessary takes
	* wait-queue spin-lock before returning, and, hence, following idiom is safe
	* ONLY when caller provides some external locking:
	*
	* Thread1 Thread2
	*
	* l_wait_event(&obj->wq, ....); (1)
	*
	* wake_up(&obj->wq): (2)
	* spin_lock(&q->lock); (2.1)
	* __wake_up_common(q, ...); (2.2)
	* spin_unlock(&q->lock, flags); (2.3)
	*
	* OBD_FREE_PTR(obj); (3)
	*
	* As l_wait_event() may "short-cut" execution and return without taking
	* wait-queue spin-lock, some additional synchronization is necessary to
	* guarantee that step (3) can begin only after (2.3) finishes.
	*
	* XXX nikita: some ptlrpc daemon threads have races of that sort.
	*
	*/
	static inline int back_to_sleep(void *arg)
	{
	return 0;
	}

	#define LWI_ON_SIGNAL_NOOP ((void ()(void ))(-1))

	struct l_wait_info {
	long lwi_timeout;
	long lwi_interval;
	int lwi_allow_intr;
	int (lwi_on_timeout)(void );
	void (lwi_on_signal)(void );
	void *lwi_cb_data;
	};

	/* NB: LWI_TIMEOUT ignores signals completely */
	#define LWI_TIMEOUT(time, cb, data) \
	((struct l_wait_info) { \
	.lwi_timeout = time, \
	.lwi_on_timeout = cb, \
	.lwi_cb_data = data, \
	.lwi_interval = 0, \
	.lwi_allow_intr = 0 \
	})

	#define LWI_TIMEOUT_INTERVAL(time, interval, cb, data) \
	((struct l_wait_info) { \
	.lwi_timeout = time, \
	.lwi_on_timeout = cb, \
	.lwi_cb_data = data, \
	.lwi_interval = interval, \
	.lwi_allow_intr = 0 \
	})

	#define LWI_TIMEOUT_INTR(time, time_cb, sig_cb, data) \
	((struct l_wait_info) { \
	.lwi_timeout = time, \
	.lwi_on_timeout = time_cb, \
	.lwi_on_signal = sig_cb, \
	.lwi_cb_data = data, \
	.lwi_interval = 0, \
	.lwi_allow_intr = 0 \
	})

	#define LWI_TIMEOUT_INTR_ALL(time, time_cb, sig_cb, data) \
	((struct l_wait_info) { \
	.lwi_timeout = time, \
	.lwi_on_timeout = time_cb, \
	.lwi_on_signal = sig_cb, \
	.lwi_cb_data = data, \
	.lwi_interval = 0, \
	.lwi_allow_intr = 1 \
	})

	#define LWI_INTR(cb, data) LWI_TIMEOUT_INTR(0, NULL, cb, data)

	#define LUSTRE_FATAL_SIGS (sigmask(SIGKILL) \| sigmask(SIGINT) \| \
	sigmask(SIGTERM) \| sigmask(SIGQUIT) \| \
	sigmask(SIGALRM))


	/*
	* wait for @condition to become true, but no longer than timeout, specified
	* by @info.
	*/
	#define __l_wait_event(wq, condition, info, ret, l_add_wait) \
	do { \
	wait_queue_t __wait; \
	long __timeout = info->lwi_timeout; \
	sigset_t __blocked; \
	int __allow_intr = info->lwi_allow_intr; \
	\
	ret = 0; \
	if (condition) \
	break; \
	\
	init_waitqueue_entry(&__wait, current); \
	l_add_wait(&wq, &__wait); \
	\
	/* Block all signals (just the non-fatal ones if no timeout). */ \
	if (info->lwi_on_signal != NULL && (__timeout == 0 \|\| __allow_intr)) \
	__blocked = cfs_block_sigsinv(LUSTRE_FATAL_SIGS); \
	else \
	__blocked = cfs_block_sigsinv(0); \
	\
	for (;;) { \
	unsigned __wstate; \
	\
	__wstate = info->lwi_on_signal != NULL && \
	(__timeout == 0 \|\| __allow_intr) ? \
	TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE; \
	\
	set_current_state(TASK_INTERRUPTIBLE); \
	\
	if (condition) \
	break; \
	\
	if (__timeout == 0) { \
	schedule(); \
	} else { \
	long interval = info->lwi_interval? \
	min_t(long, \
	info->lwi_interval,__timeout):\
	__timeout; \
	long remaining = schedule_timeout(interval);\
	__timeout = cfs_time_sub(__timeout, \
	cfs_time_sub(interval, remaining));\
	if (__timeout == 0) { \
	if (info->lwi_on_timeout == NULL \|\| \
	info->lwi_on_timeout(info->lwi_cb_data)) { \
	ret = -ETIMEDOUT; \
	break; \
	} \
	/* Take signals after the timeout expires. */ \
	if (info->lwi_on_signal != NULL) \
	(void)cfs_block_sigsinv(LUSTRE_FATAL_SIGS);\
	} \
	} \
	\
	if (condition) \
	break; \
	if (cfs_signal_pending()) { \
	if (info->lwi_on_signal != NULL && \
	(__timeout == 0 \|\| __allow_intr)) { \
	if (info->lwi_on_signal != LWI_ON_SIGNAL_NOOP) \
	info->lwi_on_signal(info->lwi_cb_data);\
	ret = -EINTR; \
	break; \
	} \
	/* We have to do this here because some signals */ \
	/* are not blockable - ie from strace(1). */ \
	/* In these cases we want to schedule_timeout() */ \
	/* again, because we don't want that to return */ \
	/* -EINTR when the RPC actually succeeded. */ \
	/* the recalc_sigpending() below will deliver the */ \
	/* signal properly. */ \
	cfs_clear_sigpending(); \
	} \
	} \
	\
	cfs_restore_sigs(__blocked); \
	\
	set_current_state(TASK_RUNNING); \
	remove_wait_queue(&wq, &__wait); \
	} while (0)



	#define l_wait_event(wq, condition, info) \
	({ \
	int __ret; \
	struct l_wait_info *__info = (info); \
	\
	__l_wait_event(wq, condition, __info, \
	__ret, add_wait_queue); \
	__ret; \
	})

	#define l_wait_event_exclusive(wq, condition, info) \
	({ \
	int __ret; \
	struct l_wait_info *__info = (info); \
	\
	__l_wait_event(wq, condition, __info, \
	__ret, add_wait_queue_exclusive); \
	__ret; \
	})

	#define l_wait_event_exclusive_head(wq, condition, info) \
	({ \
	int __ret; \
	struct l_wait_info *__info = (info); \
	\
	__l_wait_event(wq, condition, __info, \
	__ret, add_wait_queue_exclusive_head); \
	__ret; \
	})

	#define l_wait_condition(wq, condition) \
	({ \
	struct l_wait_info lwi = { 0 }; \
	l_wait_event(wq, condition, &lwi); \
	})

	#define l_wait_condition_exclusive(wq, condition) \
	({ \
	struct l_wait_info lwi = { 0 }; \
	l_wait_event_exclusive(wq, condition, &lwi); \
	})

	#define l_wait_condition_exclusive_head(wq, condition) \
	({ \
	struct l_wait_info lwi = { 0 }; \
	l_wait_event_exclusive_head(wq, condition, &lwi); \
	})

	#define LIBLUSTRE_CLIENT (0)

	/** @} lib */

	#endif /* _LUSTRE_LIB_H */