/*
 * 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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 2010, 2012, Intel Corporation.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 *
 * lustre/include/lustre/lustre_user.h
 *
 * Lustre public user-space interface definitions.
 */

#ifndef _LUSTRE_USER_H
#define _LUSTRE_USER_H

/** \defgroup lustreuser lustreuser
 *
 * @{
 */

#include "ll_fiemap.h"
#include "../linux/lustre_user.h"

/* for statfs() */
#define LL_SUPER_MAGIC 0x0BD00BD0

#ifndef FSFILT_IOC_GETFLAGS
#define FSFILT_IOC_GETFLAGS	       _IOR('f', 1, long)
#define FSFILT_IOC_SETFLAGS	       _IOW('f', 2, long)
#define FSFILT_IOC_GETVERSION	     _IOR('f', 3, long)
#define FSFILT_IOC_SETVERSION	     _IOW('f', 4, long)
#define FSFILT_IOC_GETVERSION_OLD	 _IOR('v', 1, long)
#define FSFILT_IOC_SETVERSION_OLD	 _IOW('v', 2, long)
#define FSFILT_IOC_FIEMAP		 _IOWR('f', 11, struct ll_user_fiemap)
#endif

/* FIEMAP flags supported by Lustre */
#define LUSTRE_FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_DEVICE_ORDER)

enum obd_statfs_state {
	OS_STATE_DEGRADED       = 0x00000001, /**< RAID degraded/rebuilding */
	OS_STATE_READONLY       = 0x00000002, /**< filesystem is read-only */
	OS_STATE_RDONLY_1       = 0x00000004, /**< obsolete 1.6, was EROFS=30 */
	OS_STATE_RDONLY_2       = 0x00000008, /**< obsolete 1.6, was EROFS=30 */
	OS_STATE_RDONLY_3       = 0x00000010, /**< obsolete 1.6, was EROFS=30 */
};

struct obd_statfs {
	__u64	   os_type;
	__u64	   os_blocks;
	__u64	   os_bfree;
	__u64	   os_bavail;
	__u64	   os_files;
	__u64	   os_ffree;
	__u8	    os_fsid[40];
	__u32	   os_bsize;
	__u32	   os_namelen;
	__u64	   os_maxbytes;
	__u32	   os_state;       /**< obd_statfs_state OS_STATE_* flag */
	__u32	   os_fprecreated;	/* objs available now to the caller */
					/* used in QoS code to find preferred
					 * OSTs */
	__u32	   os_spare2;
	__u32	   os_spare3;
	__u32	   os_spare4;
	__u32	   os_spare5;
	__u32	   os_spare6;
	__u32	   os_spare7;
	__u32	   os_spare8;
	__u32	   os_spare9;
};

/**
 * File IDentifier.
 *
 * FID is a cluster-wide unique identifier of a file or an object (stripe).
 * FIDs are never reused.
 **/
struct lu_fid {
       /**
	* FID sequence. Sequence is a unit of migration: all files (objects)
	* with FIDs from a given sequence are stored on the same server.
	* Lustre should support 2^64 objects, so even if each sequence
	* has only a single object we can still enumerate 2^64 objects.
	**/
	__u64 f_seq;
	/* FID number within sequence. */
	__u32 f_oid;
	/**
	 * FID version, used to distinguish different versions (in the sense
	 * of snapshots, etc.) of the same file system object. Not currently
	 * used.
	 **/
	__u32 f_ver;
};

struct filter_fid {
	struct lu_fid	ff_parent;  /* ff_parent.f_ver == file stripe number */
};

/* keep this one for compatibility */
struct filter_fid_old {
	struct lu_fid	ff_parent;
	__u64		ff_objid;
	__u64		ff_seq;
};

/* Userspace should treat lu_fid as opaque, and only use the following methods
 * to print or parse them.  Other functions (e.g. compare, swab) could be moved
 * here from lustre_idl.h if needed. */
typedef struct lu_fid lustre_fid;

/**
 * Following struct for object attributes, that will be kept inode's EA.
 * Introduced in 2.0 release (please see b15993, for details)
 * Added to all objects since Lustre 2.4 as contains self FID
 */
struct lustre_mdt_attrs {
	/**
	 * Bitfield for supported data in this structure. From enum lma_compat.
	 * lma_self_fid and lma_flags are always available.
	 */
	__u32   lma_compat;
	/**
	 * Per-file incompat feature list. Lustre version should support all
	 * flags set in this field. The supported feature mask is available in
	 * LMA_INCOMPAT_SUPP.
	 */
	__u32   lma_incompat;
	/** FID of this inode */
	struct lu_fid  lma_self_fid;
};

/**
 * Prior to 2.4, the LMA structure also included SOM attributes which has since
 * been moved to a dedicated xattr
 * lma_flags was also removed because of lma_compat/incompat fields.
 */
#define LMA_OLD_SIZE (sizeof(struct lustre_mdt_attrs) + 5 * sizeof(__u64))

/**
 * OST object IDentifier.
 */
struct ost_id {
	union {
		struct ostid {
			__u64	oi_id;
			__u64	oi_seq;
		} oi;
		struct lu_fid oi_fid;
	};
};

#define DOSTID "%#llx:%llu"
#define POSTID(oi) ostid_seq(oi), ostid_id(oi)

/*
 * The ioctl naming rules:
 * LL_*     - works on the currently opened filehandle instead of parent dir
 * *_OBD_*  - gets data for both OSC or MDC (LOV, LMV indirectly)
 * *_MDC_*  - gets/sets data related to MDC
 * *_LOV_*  - gets/sets data related to OSC/LOV
 * *FILE*   - called on parent dir and passes in a filename
 * *STRIPE* - set/get lov_user_md
 * *INFO    - set/get lov_user_mds_data
 */
/* see <lustre_lib.h> for ioctl numberss 101-150 */
#define LL_IOC_GETFLAGS		 _IOR ('f', 151, long)
#define LL_IOC_SETFLAGS		 _IOW ('f', 152, long)
#define LL_IOC_CLRFLAGS		 _IOW ('f', 153, long)
/* LL_IOC_LOV_SETSTRIPE: See also OBD_IOC_LOV_SETSTRIPE */
#define LL_IOC_LOV_SETSTRIPE	    _IOW ('f', 154, long)
/* LL_IOC_LOV_GETSTRIPE: See also OBD_IOC_LOV_GETSTRIPE */
#define LL_IOC_LOV_GETSTRIPE	    _IOW ('f', 155, long)
/* LL_IOC_LOV_SETEA: See also OBD_IOC_LOV_SETEA */
#define LL_IOC_LOV_SETEA		_IOW ('f', 156, long)
#define LL_IOC_RECREATE_OBJ	     _IOW ('f', 157, long)
#define LL_IOC_RECREATE_FID	     _IOW ('f', 157, struct lu_fid)
#define LL_IOC_GROUP_LOCK	       _IOW ('f', 158, long)
#define LL_IOC_GROUP_UNLOCK	     _IOW ('f', 159, long)
/* LL_IOC_QUOTACHECK: See also OBD_IOC_QUOTACHECK */
#define LL_IOC_QUOTACHECK	       _IOW ('f', 160, int)
/* LL_IOC_POLL_QUOTACHECK: See also OBD_IOC_POLL_QUOTACHECK */
#define LL_IOC_POLL_QUOTACHECK	  _IOR ('f', 161, struct if_quotacheck *)
/* LL_IOC_QUOTACTL: See also OBD_IOC_QUOTACTL */
#define LL_IOC_QUOTACTL		 _IOWR('f', 162, struct if_quotactl)
#define IOC_OBD_STATFS		  _IOWR('f', 164, struct obd_statfs *)
#define IOC_LOV_GETINFO		 _IOWR('f', 165, struct lov_user_mds_data *)
#define LL_IOC_FLUSHCTX		 _IOW ('f', 166, long)
#define LL_IOC_RMTACL		   _IOW ('f', 167, long)
#define LL_IOC_GETOBDCOUNT	      _IOR ('f', 168, long)
#define LL_IOC_LLOOP_ATTACH	     _IOWR('f', 169, long)
#define LL_IOC_LLOOP_DETACH	     _IOWR('f', 170, long)
#define LL_IOC_LLOOP_INFO	       _IOWR('f', 171, struct lu_fid)
#define LL_IOC_LLOOP_DETACH_BYDEV       _IOWR('f', 172, long)
#define LL_IOC_PATH2FID		 _IOR ('f', 173, long)
#define LL_IOC_GET_CONNECT_FLAGS	_IOWR('f', 174, __u64 *)
#define LL_IOC_GET_MDTIDX	       _IOR ('f', 175, int)

/* see <lustre_lib.h> for ioctl numbers 177-210 */

#define LL_IOC_HSM_STATE_GET		_IOR('f', 211, struct hsm_user_state)
#define LL_IOC_HSM_STATE_SET		_IOW('f', 212, struct hsm_state_set)
#define LL_IOC_HSM_CT_START		_IOW('f', 213, struct lustre_kernelcomm)
#define LL_IOC_HSM_COPY_START		_IOW('f', 214, struct hsm_copy *)
#define LL_IOC_HSM_COPY_END		_IOW('f', 215, struct hsm_copy *)
#define LL_IOC_HSM_PROGRESS		_IOW('f', 216, struct hsm_user_request)
#define LL_IOC_HSM_REQUEST		_IOW('f', 217, struct hsm_user_request)
#define LL_IOC_DATA_VERSION		_IOR('f', 218, struct ioc_data_version)
#define LL_IOC_LOV_SWAP_LAYOUTS		_IOW('f', 219, \
						struct lustre_swap_layouts)
#define LL_IOC_HSM_ACTION		_IOR('f', 220, \
						struct hsm_current_action)
/* see <lustre_lib.h> for ioctl numbers 221-232 */

#define LL_IOC_LMV_SETSTRIPE	    _IOWR('f', 240, struct lmv_user_md)
#define LL_IOC_LMV_GETSTRIPE	    _IOWR('f', 241, struct lmv_user_md)
#define LL_IOC_REMOVE_ENTRY	    _IOWR('f', 242, __u64)
#define LL_IOC_SET_LEASE		_IOWR('f', 243, long)
#define LL_IOC_GET_LEASE		_IO('f', 244)
#define LL_IOC_HSM_IMPORT		_IOWR('f', 245, struct hsm_user_import)

#define LL_STATFS_LMV	   1
#define LL_STATFS_LOV	   2
#define LL_STATFS_NODELAY	4

#define IOC_MDC_TYPE	    'i'
#define IOC_MDC_LOOKUP	  _IOWR(IOC_MDC_TYPE, 20, struct obd_device *)
#define IOC_MDC_GETFILESTRIPE   _IOWR(IOC_MDC_TYPE, 21, struct lov_user_md *)
#define IOC_MDC_GETFILEINFO     _IOWR(IOC_MDC_TYPE, 22, struct lov_user_mds_data *)
#define LL_IOC_MDC_GETINFO      _IOWR(IOC_MDC_TYPE, 23, struct lov_user_mds_data *)

/* Keep these for backward compartability. */
#define LL_IOC_OBD_STATFS       IOC_OBD_STATFS
#define IOC_MDC_GETSTRIPE       IOC_MDC_GETFILESTRIPE


#define MAX_OBD_NAME 128 /* If this changes, a NEW ioctl must be added */

/* Define O_LOV_DELAY_CREATE to be a mask that is not useful for regular
 * files, but are unlikely to be used in practice and are not harmful if
 * used incorrectly.  O_NOCTTY and FASYNC are only meaningful for character
 * devices and are safe for use on new files (See LU-812, LU-4209). */
#define O_LOV_DELAY_CREATE	(O_NOCTTY | FASYNC)

#define LL_FILE_IGNORE_LOCK     0x00000001
#define LL_FILE_GROUP_LOCKED    0x00000002
#define LL_FILE_READAHEA	0x00000004
#define LL_FILE_LOCKED_DIRECTIO 0x00000008 /* client-side locks with dio */
#define LL_FILE_LOCKLESS_IO     0x00000010 /* server-side locks with cio */
#define LL_FILE_RMTACL	  0x00000020

#define LOV_USER_MAGIC_V1 0x0BD10BD0
#define LOV_USER_MAGIC    LOV_USER_MAGIC_V1
#define LOV_USER_MAGIC_JOIN_V1 0x0BD20BD0
#define LOV_USER_MAGIC_V3 0x0BD30BD0

#define LMV_MAGIC_V1      0x0CD10CD0    /*normal stripe lmv magic */
#define LMV_USER_MAGIC    0x0CD20CD0    /*default lmv magic*/

#define LOV_PATTERN_RAID0 0x001
#define LOV_PATTERN_RAID1 0x002
#define LOV_PATTERN_FIRST 0x100

#define LOV_MAXPOOLNAME 16
#define LOV_POOLNAMEF "%.16s"

#define LOV_MIN_STRIPE_BITS 16   /* maximum PAGE_SIZE (ia64), power of 2 */
#define LOV_MIN_STRIPE_SIZE (1 << LOV_MIN_STRIPE_BITS)
#define LOV_MAX_STRIPE_COUNT_OLD 160
/* This calculation is crafted so that input of 4096 will result in 160
 * which in turn is equal to old maximal stripe count.
 * XXX: In fact this is too simplified for now, what it also need is to get
 * ea_type argument to clearly know how much space each stripe consumes.
 *
 * The limit of 12 pages is somewhat arbitrary, but is a reasonably large
 * allocation that is sufficient for the current generation of systems.
 *
 * (max buffer size - lov+rpc header) / sizeof(struct lov_ost_data_v1) */
#define LOV_MAX_STRIPE_COUNT 2000  /* ((12 * 4096 - 256) / 24) */
#define LOV_ALL_STRIPES       0xffff /* only valid for directories */
#define LOV_V1_INSANE_STRIPE_COUNT 65532 /* maximum stripe count bz13933 */

#define lov_user_ost_data lov_user_ost_data_v1
struct lov_user_ost_data_v1 {     /* per-stripe data structure */
	struct ost_id l_ost_oi;	  /* OST object ID */
	__u32 l_ost_gen;	  /* generation of this OST index */
	__u32 l_ost_idx;	  /* OST index in LOV */
} __attribute__((packed));

#define lov_user_md lov_user_md_v1
struct lov_user_md_v1 {	   /* LOV EA user data (host-endian) */
	__u32 lmm_magic;	  /* magic number = LOV_USER_MAGIC_V1 */
	__u32 lmm_pattern;	/* LOV_PATTERN_RAID0, LOV_PATTERN_RAID1 */
	struct ost_id lmm_oi;	  /* LOV object ID */
	__u32 lmm_stripe_size;    /* size of stripe in bytes */
	__u16 lmm_stripe_count;   /* num stripes in use for this object */
	union {
		__u16 lmm_stripe_offset;  /* starting stripe offset in
					   * lmm_objects, use when writing */
		__u16 lmm_layout_gen;     /* layout generation number
					   * used when reading */
	};
	struct lov_user_ost_data_v1 lmm_objects[0]; /* per-stripe data */
} __attribute__((packed,  __may_alias__));

struct lov_user_md_v3 {	   /* LOV EA user data (host-endian) */
	__u32 lmm_magic;	  /* magic number = LOV_USER_MAGIC_V3 */
	__u32 lmm_pattern;	/* LOV_PATTERN_RAID0, LOV_PATTERN_RAID1 */
	struct ost_id lmm_oi;	  /* LOV object ID */
	__u32 lmm_stripe_size;    /* size of stripe in bytes */
	__u16 lmm_stripe_count;   /* num stripes in use for this object */
	union {
		__u16 lmm_stripe_offset;  /* starting stripe offset in
					   * lmm_objects, use when writing */
		__u16 lmm_layout_gen;     /* layout generation number
					   * used when reading */
	};
	char  lmm_pool_name[LOV_MAXPOOLNAME]; /* pool name */
	struct lov_user_ost_data_v1 lmm_objects[0]; /* per-stripe data */
} __attribute__((packed));

static inline __u32 lov_user_md_size(__u16 stripes, __u32 lmm_magic)
{
	if (lmm_magic == LOV_USER_MAGIC_V3)
		return sizeof(struct lov_user_md_v3) +
				stripes * sizeof(struct lov_user_ost_data_v1);
	else
		return sizeof(struct lov_user_md_v1) +
				stripes * sizeof(struct lov_user_ost_data_v1);
}

/* Compile with -D_LARGEFILE64_SOURCE or -D_GNU_SOURCE (or #define) to
 * use this.  It is unsafe to #define those values in this header as it
 * is possible the application has already #included <sys/stat.h>. */
#ifdef HAVE_LOV_USER_MDS_DATA
#define lov_user_mds_data lov_user_mds_data_v1
struct lov_user_mds_data_v1 {
	lstat_t lmd_st;		 /* MDS stat struct */
	struct lov_user_md_v1 lmd_lmm;  /* LOV EA V1 user data */
} __attribute__((packed));

struct lov_user_mds_data_v3 {
	lstat_t lmd_st;		 /* MDS stat struct */
	struct lov_user_md_v3 lmd_lmm;  /* LOV EA V3 user data */
} __attribute__((packed));
#endif

/* keep this to be the same size as lov_user_ost_data_v1 */
struct lmv_user_mds_data {
	struct lu_fid	lum_fid;
	__u32		lum_padding;
	__u32		lum_mds;
};

/* lum_type */
enum {
	LMV_STRIPE_TYPE = 0,
	LMV_DEFAULT_TYPE = 1,
};

#define lmv_user_md lmv_user_md_v1
struct lmv_user_md_v1 {
	__u32	lum_magic;	 /* must be the first field */
	__u32	lum_stripe_count;  /* dirstripe count */
	__u32	lum_stripe_offset; /* MDT idx for default dirstripe */
	__u32	lum_hash_type;     /* Dir stripe policy */
	__u32	lum_type;	  /* LMV type: default or normal */
	__u32	lum_padding1;
	__u32	lum_padding2;
	__u32	lum_padding3;
	char	lum_pool_name[LOV_MAXPOOLNAME];
	struct	lmv_user_mds_data  lum_objects[0];
};

static inline int lmv_user_md_size(int stripes, int lmm_magic)
{
	return sizeof(struct lmv_user_md) +
		      stripes * sizeof(struct lmv_user_mds_data);
}

extern void lustre_swab_lmv_user_md(struct lmv_user_md *lum);

struct ll_recreate_obj {
	__u64 lrc_id;
	__u32 lrc_ost_idx;
};

struct ll_fid {
	__u64 id;	 /* holds object id */
	__u32 generation; /* holds object generation */
	__u32 f_type;     /* holds object type or stripe idx when passing it to
			   * OST for saving into EA. */
};

#define UUID_MAX	40
struct obd_uuid {
	char uuid[UUID_MAX];
};

static inline bool obd_uuid_equals(const struct obd_uuid *u1,
				   const struct obd_uuid *u2)
{
	return strcmp((char *)u1->uuid, (char *)u2->uuid) == 0;
}

static inline int obd_uuid_empty(struct obd_uuid *uuid)
{
	return uuid->uuid[0] == '\0';
}

static inline void obd_str2uuid(struct obd_uuid *uuid, const char *tmp)
{
	strncpy((char *)uuid->uuid, tmp, sizeof(*uuid));
	uuid->uuid[sizeof(*uuid) - 1] = '\0';
}

/* For printf's only, make sure uuid is terminated */
static inline char *obd_uuid2str(const struct obd_uuid *uuid)
{
	if (uuid->uuid[sizeof(*uuid) - 1] != '\0') {
		/* Obviously not safe, but for printfs, no real harm done...
		   we're always null-terminated, even in a race. */
		static char temp[sizeof(*uuid)];
		memcpy(temp, uuid->uuid, sizeof(*uuid) - 1);
		temp[sizeof(*uuid) - 1] = '\0';
		return temp;
	}
	return (char *)(uuid->uuid);
}

/* Extract fsname from uuid (or target name) of a target
   e.g. (myfs-OST0007_UUID -> myfs)
   see also deuuidify. */
static inline void obd_uuid2fsname(char *buf, char *uuid, int buflen)
{
	char *p;

	strncpy(buf, uuid, buflen - 1);
	buf[buflen - 1] = '\0';
	p = strrchr(buf, '-');
	if (p)
	   *p = '\0';
}

/* printf display format
   e.g. printf("file FID is "DFID"\n", PFID(fid)); */
#define FID_NOBRACE_LEN 40
#define FID_LEN (FID_NOBRACE_LEN + 2)
#define DFID_NOBRACE "%#llx:0x%x:0x%x"
#define DFID "["DFID_NOBRACE"]"
#define PFID(fid)     \
	(fid)->f_seq, \
	(fid)->f_oid, \
	(fid)->f_ver

/* scanf input parse format -- strip '[' first.
   e.g. sscanf(fidstr, SFID, RFID(&fid)); */
#define SFID "0x%llx:0x%x:0x%x"
#define RFID(fid)     \
	&((fid)->f_seq), \
	&((fid)->f_oid), \
	&((fid)->f_ver)


/********* Quotas **********/

/* these must be explicitly translated into linux Q_* in ll_dir_ioctl */
#define LUSTRE_Q_QUOTAON    0x800002     /* turn quotas on */
#define LUSTRE_Q_QUOTAOFF   0x800003     /* turn quotas off */
#define LUSTRE_Q_GETINFO    0x800005     /* get information about quota files */
#define LUSTRE_Q_SETINFO    0x800006     /* set information about quota files */
#define LUSTRE_Q_GETQUOTA   0x800007     /* get user quota structure */
#define LUSTRE_Q_SETQUOTA   0x800008     /* set user quota structure */
/* lustre-specific control commands */
#define LUSTRE_Q_INVALIDATE  0x80000b     /* invalidate quota data */
#define LUSTRE_Q_FINVALIDATE 0x80000c     /* invalidate filter quota data */

#define UGQUOTA 2       /* set both USRQUOTA and GRPQUOTA */

struct if_quotacheck {
	char		    obd_type[16];
	struct obd_uuid	 obd_uuid;
};

#define IDENTITY_DOWNCALL_MAGIC 0x6d6dd629

/* permission */
#define N_PERMS_MAX      64

struct perm_downcall_data {
	__u64 pdd_nid;
	__u32 pdd_perm;
	__u32 pdd_padding;
};

struct identity_downcall_data {
	__u32			    idd_magic;
	__u32			    idd_err;
	__u32			    idd_uid;
	__u32			    idd_gid;
	__u32			    idd_nperms;
	__u32			    idd_ngroups;
	struct perm_downcall_data idd_perms[N_PERMS_MAX];
	__u32			    idd_groups[0];
};

/* for non-mapped uid/gid */
#define NOBODY_UID      99
#define NOBODY_GID      99

#define INVALID_ID      (-1)

enum {
	RMT_LSETFACL    = 1,
	RMT_LGETFACL    = 2,
	RMT_RSETFACL    = 3,
	RMT_RGETFACL    = 4
};

#ifdef NEED_QUOTA_DEFS
#ifndef QIF_BLIMITS
#define QIF_BLIMITS     1
#define QIF_SPACE       2
#define QIF_ILIMITS     4
#define QIF_INODES      8
#define QIF_BTIME       16
#define QIF_ITIME       32
#define QIF_LIMITS      (QIF_BLIMITS | QIF_ILIMITS)
#define QIF_USAGE       (QIF_SPACE | QIF_INODES)
#define QIF_TIMES       (QIF_BTIME | QIF_ITIME)
#define QIF_ALL	 (QIF_LIMITS | QIF_USAGE | QIF_TIMES)
#endif

#endif /* !__KERNEL__ */

/* lustre volatile file support
 * file name header: .^L^S^T^R:volatile"
 */
#define LUSTRE_VOLATILE_HDR	".\x0c\x13\x14\x12:VOLATILE"
#define LUSTRE_VOLATILE_HDR_LEN	14
/* hdr + MDT index */
#define LUSTRE_VOLATILE_IDX	LUSTRE_VOLATILE_HDR":%.4X:"

typedef enum lustre_quota_version {
	LUSTRE_QUOTA_V2 = 1
} lustre_quota_version_t;

/* XXX: same as if_dqinfo struct in kernel */
struct obd_dqinfo {
	__u64 dqi_bgrace;
	__u64 dqi_igrace;
	__u32 dqi_flags;
	__u32 dqi_valid;
};

/* XXX: same as if_dqblk struct in kernel, plus one padding */
struct obd_dqblk {
	__u64 dqb_bhardlimit;
	__u64 dqb_bsoftlimit;
	__u64 dqb_curspace;
	__u64 dqb_ihardlimit;
	__u64 dqb_isoftlimit;
	__u64 dqb_curinodes;
	__u64 dqb_btime;
	__u64 dqb_itime;
	__u32 dqb_valid;
	__u32 dqb_padding;
};

enum {
	QC_GENERAL      = 0,
	QC_MDTIDX       = 1,
	QC_OSTIDX       = 2,
	QC_UUID	 = 3
};

struct if_quotactl {
	__u32		   qc_cmd;
	__u32		   qc_type;
	__u32		   qc_id;
	__u32		   qc_stat;
	__u32		   qc_valid;
	__u32		   qc_idx;
	struct obd_dqinfo       qc_dqinfo;
	struct obd_dqblk	qc_dqblk;
	char		    obd_type[16];
	struct obd_uuid	 obd_uuid;
};

/* swap layout flags */
#define SWAP_LAYOUTS_CHECK_DV1		(1 << 0)
#define SWAP_LAYOUTS_CHECK_DV2		(1 << 1)
#define SWAP_LAYOUTS_KEEP_MTIME		(1 << 2)
#define SWAP_LAYOUTS_KEEP_ATIME		(1 << 3)

/* Swap XATTR_NAME_HSM as well, only on the MDT so far */
#define SWAP_LAYOUTS_MDS_HSM		(1 << 31)
struct lustre_swap_layouts {
	__u64	sl_flags;
	__u32	sl_fd;
	__u32	sl_gid;
	__u64	sl_dv1;
	__u64	sl_dv2;
};


/********* Changelogs **********/
/** Changelog record types */
enum changelog_rec_type {
	CL_MARK     = 0,
	CL_CREATE   = 1,  /* namespace */
	CL_MKDIR    = 2,  /* namespace */
	CL_HARDLINK = 3,  /* namespace */
	CL_SOFTLINK = 4,  /* namespace */
	CL_MKNOD    = 5,  /* namespace */
	CL_UNLINK   = 6,  /* namespace */
	CL_RMDIR    = 7,  /* namespace */
	CL_RENAME   = 8,  /* namespace */
	CL_EXT      = 9,  /* namespace extended record (2nd half of rename) */
	CL_OPEN     = 10, /* not currently used */
	CL_CLOSE    = 11, /* may be written to log only with mtime change */
	CL_LAYOUT   = 12, /* file layout/striping modified */
	CL_TRUNC    = 13,
	CL_SETATTR  = 14,
	CL_XATTR    = 15,
	CL_HSM      = 16, /* HSM specific events, see flags */
	CL_MTIME    = 17, /* Precedence: setattr > mtime > ctime > atime */
	CL_CTIME    = 18,
	CL_ATIME    = 19,
	CL_LAST
};

static inline const char *changelog_type2str(int type) {
	static const char *changelog_str[] = {
		"MARK",  "CREAT", "MKDIR", "HLINK", "SLINK", "MKNOD", "UNLNK",
		"RMDIR", "RENME", "RNMTO", "OPEN",  "CLOSE", "LYOUT", "TRUNC",
		"SATTR", "XATTR", "HSM",   "MTIME", "CTIME", "ATIME",
	};

	if (type >= 0 && type < CL_LAST)
		return changelog_str[type];
	return NULL;
}

/* per-record flags */
#define CLF_VERSION     0x1000
#define CLF_EXT_VERSION 0x2000
#define CLF_FLAGSHIFT   12
#define CLF_FLAGMASK    ((1U << CLF_FLAGSHIFT) - 1)
#define CLF_VERMASK     (~CLF_FLAGMASK)
/* Anything under the flagmask may be per-type (if desired) */
/* Flags for unlink */
#define CLF_UNLINK_LAST       0x0001 /* Unlink of last hardlink */
#define CLF_UNLINK_HSM_EXISTS 0x0002 /* File has something in HSM */
				     /* HSM cleaning needed */
/* Flags for rename */
#define CLF_RENAME_LAST       0x0001 /* rename unlink last hardlink of target */

/* Flags for HSM */
/* 12b used (from high weight to low weight):
 * 2b for flags
 * 3b for event
 * 7b for error code
 */
#define CLF_HSM_ERR_L	0 /* HSM return code, 7 bits */
#define CLF_HSM_ERR_H	6
#define CLF_HSM_EVENT_L      7 /* HSM event, 3 bits, see enum hsm_event */
#define CLF_HSM_EVENT_H      9
#define CLF_HSM_FLAG_L      10 /* HSM flags, 2 bits, 1 used, 1 spare */
#define CLF_HSM_FLAG_H      11
#define CLF_HSM_SPARE_L     12 /* 4 spare bits */
#define CLF_HSM_SPARE_H     15
#define CLF_HSM_LAST	15

/* Remove bits higher than _h, then extract the value
 * between _h and _l by shifting lower weigth to bit 0. */
#define CLF_GET_BITS(_b, _h, _l) (((_b << (CLF_HSM_LAST - _h)) & 0xFFFF) \
				   >> (CLF_HSM_LAST - _h + _l))

#define CLF_HSM_SUCCESS      0x00
#define CLF_HSM_MAXERROR     0x7E
#define CLF_HSM_ERROVERFLOW  0x7F

#define CLF_HSM_DIRTY	1 /* file is dirty after HSM request end */

/* 3 bits field => 8 values allowed */
enum hsm_event {
	HE_ARCHIVE      = 0,
	HE_RESTORE      = 1,
	HE_CANCEL       = 2,
	HE_RELEASE      = 3,
	HE_REMOVE       = 4,
	HE_STATE	= 5,
	HE_SPARE1       = 6,
	HE_SPARE2       = 7,
};

static inline enum hsm_event hsm_get_cl_event(__u16 flags)
{
	return CLF_GET_BITS(flags, CLF_HSM_EVENT_H, CLF_HSM_EVENT_L);
}

static inline void hsm_set_cl_event(int *flags, enum hsm_event he)
{
	*flags |= (he << CLF_HSM_EVENT_L);
}

static inline __u16 hsm_get_cl_flags(int flags)
{
	return CLF_GET_BITS(flags, CLF_HSM_FLAG_H, CLF_HSM_FLAG_L);
}

static inline void hsm_set_cl_flags(int *flags, int bits)
{
	*flags |= (bits << CLF_HSM_FLAG_L);
}

static inline int hsm_get_cl_error(int flags)
{
	return CLF_GET_BITS(flags, CLF_HSM_ERR_H, CLF_HSM_ERR_L);
}

static inline void hsm_set_cl_error(int *flags, int error)
{
	*flags |= (error << CLF_HSM_ERR_L);
}

#define CR_MAXSIZE cfs_size_round(2*NAME_MAX + 1 + \
				  sizeof(struct changelog_ext_rec))

struct changelog_rec {
	__u16		 cr_namelen;
	__u16		 cr_flags; /**< (flags&CLF_FLAGMASK)|CLF_VERSION */
	__u32		 cr_type;  /**< \a changelog_rec_type */
	__u64		 cr_index; /**< changelog record number */
	__u64		 cr_prev;  /**< last index for this target fid */
	__u64		 cr_time;
	union {
		lustre_fid    cr_tfid;	/**< target fid */
		__u32	 cr_markerflags; /**< CL_MARK flags */
	};
	lustre_fid	    cr_pfid;	/**< parent fid */
	char		  cr_name[0];     /**< last element */
} __attribute__((packed));

/* changelog_ext_rec is 2*sizeof(lu_fid) bigger than changelog_rec, to save
 * space, only rename uses changelog_ext_rec, while others use changelog_rec to
 * store records.
 */
struct changelog_ext_rec {
	__u16			cr_namelen;
	__u16			cr_flags; /**< (flags & CLF_FLAGMASK) |
						CLF_EXT_VERSION */
	__u32			cr_type;  /**< \a changelog_rec_type */
	__u64			cr_index; /**< changelog record number */
	__u64			cr_prev;  /**< last index for this target fid */
	__u64			cr_time;
	union {
		lustre_fid	cr_tfid;	/**< target fid */
		__u32		cr_markerflags; /**< CL_MARK flags */
	};
	lustre_fid		cr_pfid;	/**< target parent fid */
	lustre_fid		cr_sfid;	/**< source fid, or zero */
	lustre_fid		cr_spfid;       /**< source parent fid, or zero */
	char			cr_name[0];     /**< last element */
} __attribute__((packed));

#define CHANGELOG_REC_EXTENDED(rec) \
	(((rec)->cr_flags & CLF_VERMASK) == CLF_EXT_VERSION)

static inline int changelog_rec_size(struct changelog_rec *rec)
{
	return CHANGELOG_REC_EXTENDED(rec) ? sizeof(struct changelog_ext_rec):
					     sizeof(*rec);
}

static inline char *changelog_rec_name(struct changelog_rec *rec)
{
	return CHANGELOG_REC_EXTENDED(rec) ?
		((struct changelog_ext_rec *)rec)->cr_name: rec->cr_name;
}

static inline int changelog_rec_snamelen(struct changelog_ext_rec *rec)
{
	return rec->cr_namelen - strlen(rec->cr_name) - 1;
}

static inline char *changelog_rec_sname(struct changelog_ext_rec *rec)
{
	return rec->cr_name + strlen(rec->cr_name) + 1;
}

struct ioc_changelog {
	__u64 icc_recno;
	__u32 icc_mdtindex;
	__u32 icc_id;
	__u32 icc_flags;
};

enum changelog_message_type {
	CL_RECORD = 10, /* message is a changelog_rec */
	CL_EOF    = 11, /* at end of current changelog */
};

/********* Misc **********/

struct ioc_data_version {
	__u64 idv_version;
	__u64 idv_flags;     /* See LL_DV_xxx */
};
#define LL_DV_NOFLUSH 0x01   /* Do not take READ EXTENT LOCK before sampling
				version. Dirty caches are left unchanged. */

#ifndef offsetof
# define offsetof(typ, memb)     ((unsigned long)((char *)&(((typ *)0)->memb)))
#endif

#define dot_lustre_name ".lustre"


/********* HSM **********/

/** HSM per-file state
 * See HSM_FLAGS below.
 */
enum hsm_states {
	HS_EXISTS	= 0x00000001,
	HS_DIRTY	= 0x00000002,
	HS_RELEASED	= 0x00000004,
	HS_ARCHIVED	= 0x00000008,
	HS_NORELEASE	= 0x00000010,
	HS_NOARCHIVE	= 0x00000020,
	HS_LOST		= 0x00000040,
};

/* HSM user-setable flags. */
#define HSM_USER_MASK   (HS_NORELEASE | HS_NOARCHIVE | HS_DIRTY)

/* Other HSM flags. */
#define HSM_STATUS_MASK (HS_EXISTS | HS_LOST | HS_RELEASED | HS_ARCHIVED)

/*
 * All HSM-related possible flags that could be applied to a file.
 * This should be kept in sync with hsm_states.
 */
#define HSM_FLAGS_MASK  (HSM_USER_MASK | HSM_STATUS_MASK)

/**
 * HSM request progress state
 */
enum hsm_progress_states {
	HPS_WAITING	= 1,
	HPS_RUNNING	= 2,
	HPS_DONE	= 3,
};
#define HPS_NONE	0

static inline char *hsm_progress_state2name(enum hsm_progress_states s)
{
	switch  (s) {
	case HPS_WAITING:	return "waiting";
	case HPS_RUNNING:	return "running";
	case HPS_DONE:		return "done";
	default:		return "unknown";
	}
}

struct hsm_extent {
	__u64 offset;
	__u64 length;
} __attribute__((packed));

/**
 * Current HSM states of a Lustre file.
 *
 * This structure purpose is to be sent to user-space mainly. It describes the
 * current HSM flags and in-progress action.
 */
struct hsm_user_state {
	/** Current HSM states, from enum hsm_states. */
	__u32			hus_states;
	__u32			hus_archive_id;
	/**  The current undergoing action, if there is one */
	__u32			hus_in_progress_state;
	__u32			hus_in_progress_action;
	struct hsm_extent	hus_in_progress_location;
	char			hus_extended_info[];
};

struct hsm_state_set_ioc {
	struct lu_fid	hssi_fid;
	__u64		hssi_setmask;
	__u64		hssi_clearmask;
};

/*
 * This structure describes the current in-progress action for a file.
 * it is returned to user space and send over the wire
 */
struct hsm_current_action {
	/**  The current undergoing action, if there is one */
	/* state is one of hsm_progress_states */
	__u32			hca_state;
	/* action is one of hsm_user_action */
	__u32			hca_action;
	struct hsm_extent	hca_location;
};

/***** HSM user requests ******/
/* User-generated (lfs/ioctl) request types */
enum hsm_user_action {
	HUA_NONE    =  1, /* no action (noop) */
	HUA_ARCHIVE = 10, /* copy to hsm */
	HUA_RESTORE = 11, /* prestage */
	HUA_RELEASE = 12, /* drop ost objects */
	HUA_REMOVE  = 13, /* remove from archive */
	HUA_CANCEL  = 14  /* cancel a request */
};

static inline char *hsm_user_action2name(enum hsm_user_action  a)
{
	switch  (a) {
	case HUA_NONE:    return "NOOP";
	case HUA_ARCHIVE: return "ARCHIVE";
	case HUA_RESTORE: return "RESTORE";
	case HUA_RELEASE: return "RELEASE";
	case HUA_REMOVE:  return "REMOVE";
	case HUA_CANCEL:  return "CANCEL";
	default:	  return "UNKNOWN";
	}
}

/*
 * List of hr_flags (bit field)
 */
#define HSM_FORCE_ACTION 0x0001
/* used by CT, connot be set by user */
#define HSM_GHOST_COPY   0x0002

/**
 * Contains all the fixed part of struct hsm_user_request.
 *
 */
struct hsm_request {
	__u32 hr_action;	/* enum hsm_user_action */
	__u32 hr_archive_id;	/* archive id, used only with HUA_ARCHIVE */
	__u64 hr_flags;		/* request flags */
	__u32 hr_itemcount;	/* item count in hur_user_item vector */
	__u32 hr_data_len;
};

struct hsm_user_item {
       lustre_fid	hui_fid;
       struct hsm_extent hui_extent;
} __attribute__((packed));

struct hsm_user_request {
	struct hsm_request	hur_request;
	struct hsm_user_item	hur_user_item[0];
	/* extra data blob at end of struct (after all
	 * hur_user_items), only use helpers to access it
	 */
} __attribute__((packed));

/** Return pointer to data field in a hsm user request */
static inline void *hur_data(struct hsm_user_request *hur)
{
	return &(hur->hur_user_item[hur->hur_request.hr_itemcount]);
}

/**
 * Compute the current length of the provided hsm_user_request.  This returns -1
 * instead of an errno because ssize_t is defined to be only [ -1, SSIZE_MAX ]
 *
 * return -1 on bounds check error.
 */
static inline ssize_t hur_len(struct hsm_user_request *hur)
{
	__u64	size;

	/* can't overflow a __u64 since hr_itemcount is only __u32 */
	size = offsetof(struct hsm_user_request, hur_user_item[0]) +
		(__u64)hur->hur_request.hr_itemcount *
		sizeof(hur->hur_user_item[0]) + hur->hur_request.hr_data_len;

	if (size != (ssize_t)size)
		return -1;

	return size;
}

/****** HSM RPCs to copytool *****/
/* Message types the copytool may receive */
enum hsm_message_type {
	HMT_ACTION_LIST = 100, /* message is a hsm_action_list */
};

/* Actions the copytool may be instructed to take for a given action_item */
enum hsm_copytool_action {
	HSMA_NONE    = 10, /* no action */
	HSMA_ARCHIVE = 20, /* arbitrary offset */
	HSMA_RESTORE = 21,
	HSMA_REMOVE  = 22,
	HSMA_CANCEL  = 23
};

static inline char *hsm_copytool_action2name(enum hsm_copytool_action  a)
{
	switch  (a) {
	case HSMA_NONE:    return "NOOP";
	case HSMA_ARCHIVE: return "ARCHIVE";
	case HSMA_RESTORE: return "RESTORE";
	case HSMA_REMOVE:  return "REMOVE";
	case HSMA_CANCEL:  return "CANCEL";
	default:	   return "UNKNOWN";
	}
}

/* Copytool item action description */
struct hsm_action_item {
	__u32      hai_len;     /* valid size of this struct */
	__u32      hai_action;  /* hsm_copytool_action, but use known size */
	lustre_fid hai_fid;     /* Lustre FID to operated on */
	lustre_fid hai_dfid;    /* fid used for data access */
	struct hsm_extent hai_extent;  /* byte range to operate on */
	__u64      hai_cookie;  /* action cookie from coordinator */
	__u64      hai_gid;     /* grouplock id */
	char       hai_data[0]; /* variable length */
} __attribute__((packed));

/*
 * helper function which print in hexa the first bytes of
 * hai opaque field
 * \param hai [IN] record to print
 * \param buffer [OUT] output buffer
 * \param len [IN] max buffer len
 * \retval buffer
 */
static inline char *hai_dump_data_field(struct hsm_action_item *hai,
					char *buffer, int len)
{
	int i, sz, data_len;
	char *ptr;

	ptr = buffer;
	sz = len;
	data_len = hai->hai_len - sizeof(*hai);
	for (i = 0 ; (i < data_len) && (sz > 0) ; i++) {
		int cnt;

		cnt = snprintf(ptr, sz, "%.2X",
			       (unsigned char)hai->hai_data[i]);
		ptr += cnt;
		sz -= cnt;
	}
	*ptr = '\0';
	return buffer;
}

/* Copytool action list */
#define HAL_VERSION 1
#define HAL_MAXSIZE LNET_MTU /* bytes, used in userspace only */
struct hsm_action_list {
	__u32 hal_version;
	__u32 hal_count;       /* number of hai's to follow */
	__u64 hal_compound_id; /* returned by coordinator */
	__u64 hal_flags;
	__u32 hal_archive_id; /* which archive backend */
	__u32 padding1;
	char  hal_fsname[0];   /* null-terminated */
	/* struct hsm_action_item[hal_count] follows, aligned on 8-byte
	   boundaries. See hai_zero */
} __attribute__((packed));

#ifndef HAVE_CFS_SIZE_ROUND
static inline int cfs_size_round (int val)
{
	return (val + 7) & (~0x7);
}
#define HAVE_CFS_SIZE_ROUND
#endif

/* Return pointer to first hai in action list */
static inline struct hsm_action_item *hai_zero(struct hsm_action_list *hal)
{
	return (struct hsm_action_item *)(hal->hal_fsname +
					  cfs_size_round(strlen(hal-> \
								hal_fsname)
							 + 1));
}
/* Return pointer to next hai */
static inline struct hsm_action_item *hai_next(struct hsm_action_item *hai)
{
	return (struct hsm_action_item *)((char *)hai +
					  cfs_size_round(hai->hai_len));
}

/* Return size of an hsm_action_list */
static inline int hal_size(struct hsm_action_list *hal)
{
	int i, sz;
	struct hsm_action_item *hai;

	sz = sizeof(*hal) + cfs_size_round(strlen(hal->hal_fsname) + 1);
	hai = hai_zero(hal);
	for (i = 0; i < hal->hal_count; i++, hai = hai_next(hai))
		sz += cfs_size_round(hai->hai_len);

	return sz;
}

/* HSM file import
 * describe the attributes to be set on imported file
 */
struct hsm_user_import {
	__u64		hui_size;
	__u64		hui_atime;
	__u64		hui_mtime;
	__u32		hui_atime_ns;
	__u32		hui_mtime_ns;
	__u32		hui_uid;
	__u32		hui_gid;
	__u32		hui_mode;
	__u32		hui_archive_id;
};

/* Copytool progress reporting */
#define HP_FLAG_COMPLETED 0x01
#define HP_FLAG_RETRY     0x02

struct hsm_progress {
	lustre_fid		hp_fid;
	__u64			hp_cookie;
	struct hsm_extent	hp_extent;
	__u16			hp_flags;
	__u16			hp_errval; /* positive val */
	__u32			padding;
};

struct hsm_copy {
	__u64			hc_data_version;
	__u16			hc_flags;
	__u16			hc_errval; /* positive val */
	__u32			padding;
	struct hsm_action_item	hc_hai;
};

/** @} lustreuser */

#endif /* _LUSTRE_USER_H */