include/linux/nfs4.h - kernel/msm-4.9 - Gitiles

 /*
  *  include/linux/nfs4.h
  *
  *  NFSv4 protocol definitions.
  *
  *  Copyright (c) 2002 The Regents of the University of Michigan.
  *  All rights reserved.
  *
  *  Kendrick Smith <kmsmith@umich.edu>
  *  Andy Adamson   <andros@umich.edu>
  */
 #ifndef _LINUX_NFS4_H
 #define _LINUX_NFS4_H

 #include <linux/list.h>
 #include <linux/uidgid.h>
 #include <uapi/linux/nfs4.h>

 struct nfs4_ace {
 	uint32_t	type;
 	uint32_t	flag;
 	uint32_t	access_mask;
 	int		whotype;
 	union {
 		kuid_t	who_uid;
 		kgid_t	who_gid;
 	};
 };

 struct nfs4_acl {
 	uint32_t	naces;
 	struct nfs4_ace	aces[0];
 };

 typedef struct { char data[NFS4_VERIFIER_SIZE]; } nfs4_verifier;

 struct nfs_stateid4 {
 	__be32 seqid;
 	char other[NFS4_STATEID_OTHER_SIZE];
 } __attribute__ ((packed));

 typedef struct nfs_stateid4 nfs4_stateid;

 enum nfs_opnum4 {
 	OP_ACCESS = 3,
 	OP_CLOSE = 4,
 	OP_COMMIT = 5,
 	OP_CREATE = 6,
 	OP_DELEGPURGE = 7,
 	OP_DELEGRETURN = 8,
 	OP_GETATTR = 9,
 	OP_GETFH = 10,
 	OP_LINK = 11,
 	OP_LOCK = 12,
 	OP_LOCKT = 13,
 	OP_LOCKU = 14,
 	OP_LOOKUP = 15,
 	OP_LOOKUPP = 16,
 	OP_NVERIFY = 17,
 	OP_OPEN = 18,
 	OP_OPENATTR = 19,
 	OP_OPEN_CONFIRM = 20,
 	OP_OPEN_DOWNGRADE = 21,
 	OP_PUTFH = 22,
 	OP_PUTPUBFH = 23,
 	OP_PUTROOTFH = 24,
 	OP_READ = 25,
 	OP_READDIR = 26,
 	OP_READLINK = 27,
 	OP_REMOVE = 28,
 	OP_RENAME = 29,
 	OP_RENEW = 30,
 	OP_RESTOREFH = 31,
 	OP_SAVEFH = 32,
 	OP_SECINFO = 33,
 	OP_SETATTR = 34,
 	OP_SETCLIENTID = 35,
 	OP_SETCLIENTID_CONFIRM = 36,
 	OP_VERIFY = 37,
 	OP_WRITE = 38,
 	OP_RELEASE_LOCKOWNER = 39,

 	/* nfs41 */
 	OP_BACKCHANNEL_CTL = 40,
 	OP_BIND_CONN_TO_SESSION = 41,
 	OP_EXCHANGE_ID = 42,
 	OP_CREATE_SESSION = 43,
 	OP_DESTROY_SESSION = 44,
 	OP_FREE_STATEID = 45,
 	OP_GET_DIR_DELEGATION = 46,
 	OP_GETDEVICEINFO = 47,
 	OP_GETDEVICELIST = 48,
 	OP_LAYOUTCOMMIT = 49,
 	OP_LAYOUTGET = 50,
 	OP_LAYOUTRETURN = 51,
 	OP_SECINFO_NO_NAME = 52,
 	OP_SEQUENCE = 53,
 	OP_SET_SSV = 54,
 	OP_TEST_STATEID = 55,
 	OP_WANT_DELEGATION = 56,
 	OP_DESTROY_CLIENTID = 57,
 	OP_RECLAIM_COMPLETE = 58,

 	OP_ILLEGAL = 10044,
 };

 /*Defining first and last NFS4 operations implemented.
 Needs to be updated if more operations are defined in future.*/

 #define FIRST_NFS4_OP	OP_ACCESS
 #define LAST_NFS4_OP 	OP_RECLAIM_COMPLETE

 enum nfsstat4 {
 	NFS4_OK = 0,
 	NFS4ERR_PERM = 1,
 	NFS4ERR_NOENT = 2,
 	NFS4ERR_IO = 5,
 	NFS4ERR_NXIO = 6,
 	NFS4ERR_ACCESS = 13,
 	NFS4ERR_EXIST = 17,
 	NFS4ERR_XDEV = 18,
 	/* Unused/reserved 19 */
 	NFS4ERR_NOTDIR = 20,
 	NFS4ERR_ISDIR = 21,
 	NFS4ERR_INVAL = 22,
 	NFS4ERR_FBIG = 27,
 	NFS4ERR_NOSPC = 28,
 	NFS4ERR_ROFS = 30,
 	NFS4ERR_MLINK = 31,
 	NFS4ERR_NAMETOOLONG = 63,
 	NFS4ERR_NOTEMPTY = 66,
 	NFS4ERR_DQUOT = 69,
 	NFS4ERR_STALE = 70,
 	NFS4ERR_BADHANDLE = 10001,
 	NFS4ERR_BAD_COOKIE = 10003,
 	NFS4ERR_NOTSUPP = 10004,
 	NFS4ERR_TOOSMALL = 10005,
 	NFS4ERR_SERVERFAULT = 10006,
 	NFS4ERR_BADTYPE = 10007,
 	NFS4ERR_DELAY = 10008,
 	NFS4ERR_SAME = 10009,
 	NFS4ERR_DENIED = 10010,
 	NFS4ERR_EXPIRED = 10011,
 	NFS4ERR_LOCKED = 10012,
 	NFS4ERR_GRACE = 10013,
 	NFS4ERR_FHEXPIRED = 10014,
 	NFS4ERR_SHARE_DENIED = 10015,
 	NFS4ERR_WRONGSEC = 10016,
 	NFS4ERR_CLID_INUSE = 10017,
 	NFS4ERR_RESOURCE = 10018,
 	NFS4ERR_MOVED = 10019,
 	NFS4ERR_NOFILEHANDLE = 10020,
 	NFS4ERR_MINOR_VERS_MISMATCH = 10021,
 	NFS4ERR_STALE_CLIENTID = 10022,
 	NFS4ERR_STALE_STATEID = 10023,
 	NFS4ERR_OLD_STATEID = 10024,
 	NFS4ERR_BAD_STATEID = 10025,
 	NFS4ERR_BAD_SEQID = 10026,
 	NFS4ERR_NOT_SAME = 10027,
 	NFS4ERR_LOCK_RANGE = 10028,
 	NFS4ERR_SYMLINK = 10029,
 	NFS4ERR_RESTOREFH = 10030,
 	NFS4ERR_LEASE_MOVED = 10031,
 	NFS4ERR_ATTRNOTSUPP = 10032,
 	NFS4ERR_NO_GRACE = 10033,
 	NFS4ERR_RECLAIM_BAD = 10034,
 	NFS4ERR_RECLAIM_CONFLICT = 10035,
 	NFS4ERR_BADXDR = 10036,
 	NFS4ERR_LOCKS_HELD = 10037,
 	NFS4ERR_OPENMODE = 10038,
 	NFS4ERR_BADOWNER = 10039,
 	NFS4ERR_BADCHAR = 10040,
 	NFS4ERR_BADNAME = 10041,
 	NFS4ERR_BAD_RANGE = 10042,
 	NFS4ERR_LOCK_NOTSUPP = 10043,
 	NFS4ERR_OP_ILLEGAL = 10044,
 	NFS4ERR_DEADLOCK = 10045,
 	NFS4ERR_FILE_OPEN = 10046,
 	NFS4ERR_ADMIN_REVOKED = 10047,
 	NFS4ERR_CB_PATH_DOWN = 10048,

 	/* nfs41 */
 	NFS4ERR_BADIOMODE	= 10049,
 	NFS4ERR_BADLAYOUT	= 10050,
 	NFS4ERR_BAD_SESSION_DIGEST = 10051,
 	NFS4ERR_BADSESSION	= 10052,
 	NFS4ERR_BADSLOT		= 10053,
 	NFS4ERR_COMPLETE_ALREADY = 10054,
 	NFS4ERR_CONN_NOT_BOUND_TO_SESSION = 10055,
 	NFS4ERR_DELEG_ALREADY_WANTED = 10056,
 	NFS4ERR_BACK_CHAN_BUSY	= 10057,	/* backchan reqs outstanding */
 	NFS4ERR_LAYOUTTRYLATER	= 10058,
 	NFS4ERR_LAYOUTUNAVAILABLE = 10059,
 	NFS4ERR_NOMATCHING_LAYOUT = 10060,
 	NFS4ERR_RECALLCONFLICT	= 10061,
 	NFS4ERR_UNKNOWN_LAYOUTTYPE = 10062,
 	NFS4ERR_SEQ_MISORDERED = 10063, 	/* unexpected seq.id in req */
 	NFS4ERR_SEQUENCE_POS	= 10064,	/* [CB_]SEQ. op not 1st op */
 	NFS4ERR_REQ_TOO_BIG	= 10065,	/* request too big */
 	NFS4ERR_REP_TOO_BIG	= 10066,	/* reply too big */
 	NFS4ERR_REP_TOO_BIG_TO_CACHE = 10067,	/* rep. not all cached */
 	NFS4ERR_RETRY_UNCACHED_REP = 10068,	/* retry & rep. uncached */
 	NFS4ERR_UNSAFE_COMPOUND = 10069,	/* retry/recovery too hard */
 	NFS4ERR_TOO_MANY_OPS	= 10070,	/* too many ops in [CB_]COMP */
 	NFS4ERR_OP_NOT_IN_SESSION = 10071,	/* op needs [CB_]SEQ. op */
 	NFS4ERR_HASH_ALG_UNSUPP = 10072,	/* hash alg. not supp. */
 						/* Error 10073 is unused. */
 	NFS4ERR_CLIENTID_BUSY	= 10074,	/* clientid has state */
 	NFS4ERR_PNFS_IO_HOLE	= 10075,	/* IO to _SPARSE file hole */
 	NFS4ERR_SEQ_FALSE_RETRY	= 10076,	/* retry not original */
 	NFS4ERR_BAD_HIGH_SLOT	= 10077,	/* sequence arg bad */
 	NFS4ERR_DEADSESSION	= 10078,	/* persistent session dead */
 	NFS4ERR_ENCR_ALG_UNSUPP = 10079,	/* SSV alg mismatch */
 	NFS4ERR_PNFS_NO_LAYOUT	= 10080,	/* direct I/O with no layout */
 	NFS4ERR_NOT_ONLY_OP	= 10081,	/* bad compound */
 	NFS4ERR_WRONG_CRED	= 10082,	/* permissions:state change */
 	NFS4ERR_WRONG_TYPE	= 10083,	/* current operation mismatch */
 	NFS4ERR_DIRDELEG_UNAVAIL = 10084,	/* no directory delegation */
 	NFS4ERR_REJECT_DELEG	= 10085,	/* on callback */
 	NFS4ERR_RETURNCONFLICT	= 10086,	/* outstanding layoutreturn */
 	NFS4ERR_DELEG_REVOKED	= 10087,	/* deleg./layout revoked */
 };

 static inline bool seqid_mutating_err(u32 err)
 {
 	/* rfc 3530 section 8.1.5: */
 	switch (err) {
 	case NFS4ERR_STALE_CLIENTID:
 	case NFS4ERR_STALE_STATEID:
 	case NFS4ERR_BAD_STATEID:
 	case NFS4ERR_BAD_SEQID:
 	case NFS4ERR_BADXDR:
 	case NFS4ERR_RESOURCE:
 	case NFS4ERR_NOFILEHANDLE:
 		return false;
 	};
 	return true;
 }

 /*
  * Note: NF4BAD is not actually part of the protocol; it is just used
  * internally by nfsd.
  */
 enum nfs_ftype4 {
 	NF4BAD		= 0,
         NF4REG          = 1,    /* Regular File */
         NF4DIR          = 2,    /* Directory */
         NF4BLK          = 3,    /* Special File - block device */
         NF4CHR          = 4,    /* Special File - character device */
         NF4LNK          = 5,    /* Symbolic Link */
         NF4SOCK         = 6,    /* Special File - socket */
         NF4FIFO         = 7,    /* Special File - fifo */
         NF4ATTRDIR      = 8,    /* Attribute Directory */
         NF4NAMEDATTR    = 9     /* Named Attribute */
 };

 enum open_claim_type4 {
 	NFS4_OPEN_CLAIM_NULL = 0,
 	NFS4_OPEN_CLAIM_PREVIOUS = 1,
 	NFS4_OPEN_CLAIM_DELEGATE_CUR = 2,
 	NFS4_OPEN_CLAIM_DELEGATE_PREV = 3,
 	NFS4_OPEN_CLAIM_FH = 4, /* 4.1 */
 	NFS4_OPEN_CLAIM_DELEG_CUR_FH = 5, /* 4.1 */
 	NFS4_OPEN_CLAIM_DELEG_PREV_FH = 6, /* 4.1 */
 };

 enum opentype4 {
 	NFS4_OPEN_NOCREATE = 0,
 	NFS4_OPEN_CREATE = 1
 };

 enum createmode4 {
 	NFS4_CREATE_UNCHECKED = 0,
 	NFS4_CREATE_GUARDED = 1,
 	NFS4_CREATE_EXCLUSIVE = 2,
 	/*
 	 * New to NFSv4.1. If session is persistent,
 	 * GUARDED4 MUST be used. Otherwise, use
 	 * EXCLUSIVE4_1 instead of EXCLUSIVE4.
 	 */
 	NFS4_CREATE_EXCLUSIVE4_1 = 3
 };

 enum limit_by4 {
 	NFS4_LIMIT_SIZE = 1,
 	NFS4_LIMIT_BLOCKS = 2
 };

 enum open_delegation_type4 {
 	NFS4_OPEN_DELEGATE_NONE = 0,
 	NFS4_OPEN_DELEGATE_READ = 1,
 	NFS4_OPEN_DELEGATE_WRITE = 2,
 	NFS4_OPEN_DELEGATE_NONE_EXT = 3, /* 4.1 */
 };

 enum why_no_delegation4 { /* new to v4.1 */
 	WND4_NOT_WANTED = 0,
 	WND4_CONTENTION = 1,
 	WND4_RESOURCE = 2,
 	WND4_NOT_SUPP_FTYPE = 3,
 	WND4_WRITE_DELEG_NOT_SUPP_FTYPE = 4,
 	WND4_NOT_SUPP_UPGRADE = 5,
 	WND4_NOT_SUPP_DOWNGRADE = 6,
 	WND4_CANCELLED = 7,
 	WND4_IS_DIR = 8,
 };

 enum lock_type4 {
 	NFS4_UNLOCK_LT = 0,
 	NFS4_READ_LT = 1,
 	NFS4_WRITE_LT = 2,
 	NFS4_READW_LT = 3,
 	NFS4_WRITEW_LT = 4
 };


 /* Mandatory Attributes */
 #define FATTR4_WORD0_SUPPORTED_ATTRS    (1UL << 0)
 #define FATTR4_WORD0_TYPE               (1UL << 1)
 #define FATTR4_WORD0_FH_EXPIRE_TYPE     (1UL << 2)
 #define FATTR4_WORD0_CHANGE             (1UL << 3)
 #define FATTR4_WORD0_SIZE               (1UL << 4)
 #define FATTR4_WORD0_LINK_SUPPORT       (1UL << 5)
 #define FATTR4_WORD0_SYMLINK_SUPPORT    (1UL << 6)
 #define FATTR4_WORD0_NAMED_ATTR         (1UL << 7)
 #define FATTR4_WORD0_FSID               (1UL << 8)
 #define FATTR4_WORD0_UNIQUE_HANDLES     (1UL << 9)
 #define FATTR4_WORD0_LEASE_TIME         (1UL << 10)
 #define FATTR4_WORD0_RDATTR_ERROR       (1UL << 11)
 /* Mandatory in NFSv4.1 */
 #define FATTR4_WORD2_SUPPATTR_EXCLCREAT (1UL << 11)

 /* Recommended Attributes */
 #define FATTR4_WORD0_ACL                (1UL << 12)
 #define FATTR4_WORD0_ACLSUPPORT         (1UL << 13)
 #define FATTR4_WORD0_ARCHIVE            (1UL << 14)
 #define FATTR4_WORD0_CANSETTIME         (1UL << 15)
 #define FATTR4_WORD0_CASE_INSENSITIVE   (1UL << 16)
 #define FATTR4_WORD0_CASE_PRESERVING    (1UL << 17)
 #define FATTR4_WORD0_CHOWN_RESTRICTED   (1UL << 18)
 #define FATTR4_WORD0_FILEHANDLE         (1UL << 19)
 #define FATTR4_WORD0_FILEID             (1UL << 20)
 #define FATTR4_WORD0_FILES_AVAIL        (1UL << 21)
 #define FATTR4_WORD0_FILES_FREE         (1UL << 22)
 #define FATTR4_WORD0_FILES_TOTAL        (1UL << 23)
 #define FATTR4_WORD0_FS_LOCATIONS       (1UL << 24)
 #define FATTR4_WORD0_HIDDEN             (1UL << 25)
 #define FATTR4_WORD0_HOMOGENEOUS        (1UL << 26)
 #define FATTR4_WORD0_MAXFILESIZE        (1UL << 27)
 #define FATTR4_WORD0_MAXLINK            (1UL << 28)
 #define FATTR4_WORD0_MAXNAME            (1UL << 29)
 #define FATTR4_WORD0_MAXREAD            (1UL << 30)
 #define FATTR4_WORD0_MAXWRITE           (1UL << 31)
 #define FATTR4_WORD1_MIMETYPE           (1UL << 0)
 #define FATTR4_WORD1_MODE               (1UL << 1)
 #define FATTR4_WORD1_NO_TRUNC           (1UL << 2)
 #define FATTR4_WORD1_NUMLINKS           (1UL << 3)
 #define FATTR4_WORD1_OWNER              (1UL << 4)
 #define FATTR4_WORD1_OWNER_GROUP        (1UL << 5)
 #define FATTR4_WORD1_QUOTA_HARD         (1UL << 6)
 #define FATTR4_WORD1_QUOTA_SOFT         (1UL << 7)
 #define FATTR4_WORD1_QUOTA_USED         (1UL << 8)
 #define FATTR4_WORD1_RAWDEV             (1UL << 9)
 #define FATTR4_WORD1_SPACE_AVAIL        (1UL << 10)
 #define FATTR4_WORD1_SPACE_FREE         (1UL << 11)
 #define FATTR4_WORD1_SPACE_TOTAL        (1UL << 12)
 #define FATTR4_WORD1_SPACE_USED         (1UL << 13)
 #define FATTR4_WORD1_SYSTEM             (1UL << 14)
 #define FATTR4_WORD1_TIME_ACCESS        (1UL << 15)
 #define FATTR4_WORD1_TIME_ACCESS_SET    (1UL << 16)
 #define FATTR4_WORD1_TIME_BACKUP        (1UL << 17)
 #define FATTR4_WORD1_TIME_CREATE        (1UL << 18)
 #define FATTR4_WORD1_TIME_DELTA         (1UL << 19)
 #define FATTR4_WORD1_TIME_METADATA      (1UL << 20)
 #define FATTR4_WORD1_TIME_MODIFY        (1UL << 21)
 #define FATTR4_WORD1_TIME_MODIFY_SET    (1UL << 22)
 #define FATTR4_WORD1_MOUNTED_ON_FILEID  (1UL << 23)
 #define FATTR4_WORD1_FS_LAYOUT_TYPES    (1UL << 30)
 #define FATTR4_WORD2_LAYOUT_BLKSIZE     (1UL << 1)
 #define FATTR4_WORD2_MDSTHRESHOLD       (1UL << 4)

 /* MDS threshold bitmap bits */
 #define THRESHOLD_RD                    (1UL << 0)
 #define THRESHOLD_WR                    (1UL << 1)
 #define THRESHOLD_RD_IO                 (1UL << 2)
 #define THRESHOLD_WR_IO                 (1UL << 3)

 #define NFSPROC4_NULL 0
 #define NFSPROC4_COMPOUND 1
 #define NFS4_VERSION 4
 #define NFS4_MINOR_VERSION 0

 #if defined(CONFIG_NFS_V4_1)
 #define NFS4_MAX_MINOR_VERSION 1
 #else
 #define NFS4_MAX_MINOR_VERSION 0
 #endif /* CONFIG_NFS_V4_1 */

 #define NFS4_DEBUG 1

 /* Index of predefined Linux client operations */

 enum {
 	NFSPROC4_CLNT_NULL = 0,		/* Unused */
 	NFSPROC4_CLNT_READ,
 	NFSPROC4_CLNT_WRITE,
 	NFSPROC4_CLNT_COMMIT,
 	NFSPROC4_CLNT_OPEN,
 	NFSPROC4_CLNT_OPEN_CONFIRM,
 	NFSPROC4_CLNT_OPEN_NOATTR,
 	NFSPROC4_CLNT_OPEN_DOWNGRADE,
 	NFSPROC4_CLNT_CLOSE,
 	NFSPROC4_CLNT_SETATTR,
 	NFSPROC4_CLNT_FSINFO,
 	NFSPROC4_CLNT_RENEW,
 	NFSPROC4_CLNT_SETCLIENTID,
 	NFSPROC4_CLNT_SETCLIENTID_CONFIRM,
 	NFSPROC4_CLNT_LOCK,
 	NFSPROC4_CLNT_LOCKT,
 	NFSPROC4_CLNT_LOCKU,
 	NFSPROC4_CLNT_ACCESS,
 	NFSPROC4_CLNT_GETATTR,
 	NFSPROC4_CLNT_LOOKUP,
 	NFSPROC4_CLNT_LOOKUP_ROOT,
 	NFSPROC4_CLNT_REMOVE,
 	NFSPROC4_CLNT_RENAME,
 	NFSPROC4_CLNT_LINK,
 	NFSPROC4_CLNT_SYMLINK,
 	NFSPROC4_CLNT_CREATE,
 	NFSPROC4_CLNT_PATHCONF,
 	NFSPROC4_CLNT_STATFS,
 	NFSPROC4_CLNT_READLINK,
 	NFSPROC4_CLNT_READDIR,
 	NFSPROC4_CLNT_SERVER_CAPS,
 	NFSPROC4_CLNT_DELEGRETURN,
 	NFSPROC4_CLNT_GETACL,
 	NFSPROC4_CLNT_SETACL,
 	NFSPROC4_CLNT_FS_LOCATIONS,
 	NFSPROC4_CLNT_RELEASE_LOCKOWNER,
 	NFSPROC4_CLNT_SECINFO,

 	/* nfs41 */
 	NFSPROC4_CLNT_EXCHANGE_ID,
 	NFSPROC4_CLNT_CREATE_SESSION,
 	NFSPROC4_CLNT_DESTROY_SESSION,
 	NFSPROC4_CLNT_SEQUENCE,
 	NFSPROC4_CLNT_GET_LEASE_TIME,
 	NFSPROC4_CLNT_RECLAIM_COMPLETE,
 	NFSPROC4_CLNT_LAYOUTGET,
 	NFSPROC4_CLNT_GETDEVICEINFO,
 	NFSPROC4_CLNT_LAYOUTCOMMIT,
 	NFSPROC4_CLNT_LAYOUTRETURN,
 	NFSPROC4_CLNT_SECINFO_NO_NAME,
 	NFSPROC4_CLNT_TEST_STATEID,
 	NFSPROC4_CLNT_FREE_STATEID,
 	NFSPROC4_CLNT_GETDEVICELIST,
 	NFSPROC4_CLNT_BIND_CONN_TO_SESSION,
 	NFSPROC4_CLNT_DESTROY_CLIENTID,
 };

 /* nfs41 types */
 struct nfs4_sessionid {
 	unsigned char data[NFS4_MAX_SESSIONID_LEN];
 };

 /* Create Session Flags */
 #define SESSION4_PERSIST	0x001
 #define SESSION4_BACK_CHAN	0x002
 #define SESSION4_RDMA		0x004

 #define SESSION4_FLAG_MASK_A	0x007

 enum state_protect_how4 {
 	SP4_NONE	= 0,
 	SP4_MACH_CRED	= 1,
 	SP4_SSV		= 2
 };

 enum pnfs_layouttype {
 	LAYOUT_NFSV4_1_FILES  = 1,
 	LAYOUT_OSD2_OBJECTS = 2,
 	LAYOUT_BLOCK_VOLUME = 3,
 };

 /* used for both layout return and recall */
 enum pnfs_layoutreturn_type {
 	RETURN_FILE = 1,
 	RETURN_FSID = 2,
 	RETURN_ALL  = 3
 };

 enum pnfs_iomode {
 	IOMODE_READ = 1,
 	IOMODE_RW = 2,
 	IOMODE_ANY = 3,
 };

 enum pnfs_notify_deviceid_type4 {
 	NOTIFY_DEVICEID4_CHANGE = 1 << 1,
 	NOTIFY_DEVICEID4_DELETE = 1 << 2,
 };

 #define NFL4_UFLG_MASK			0x0000003F
 #define NFL4_UFLG_DENSE			0x00000001
 #define NFL4_UFLG_COMMIT_THRU_MDS	0x00000002
 #define NFL4_UFLG_STRIPE_UNIT_SIZE_MASK	0xFFFFFFC0

 /* Encoded in the loh_body field of type layouthint4 */
 enum filelayout_hint_care4 {
 	NFLH4_CARE_DENSE		= NFL4_UFLG_DENSE,
 	NFLH4_CARE_COMMIT_THRU_MDS	= NFL4_UFLG_COMMIT_THRU_MDS,
 	NFLH4_CARE_STRIPE_UNIT_SIZE	= 0x00000040,
 	NFLH4_CARE_STRIPE_COUNT		= 0x00000080
 };

 #define NFS4_DEVICEID4_SIZE 16

 struct nfs4_deviceid {
 	char data[NFS4_DEVICEID4_SIZE];
 };

 #endif
	/*
	* include/linux/nfs4.h
	*
	* NFSv4 protocol definitions.
	*
	* Copyright (c) 2002 The Regents of the University of Michigan.
	* All rights reserved.
	*
	* Kendrick Smith <kmsmith@umich.edu>
	* Andy Adamson <andros@umich.edu>
	*/
	#ifndef _LINUX_NFS4_H
	#define _LINUX_NFS4_H

	#include <linux/list.h>
	#include <linux/uidgid.h>
	#include <uapi/linux/nfs4.h>

	struct nfs4_ace {
	uint32_t type;
	uint32_t flag;
	uint32_t access_mask;
	int whotype;
	union {
	kuid_t who_uid;
	kgid_t who_gid;
	};
	};

	struct nfs4_acl {
	uint32_t naces;
	struct nfs4_ace aces[0];
	};

	typedef struct { char data[NFS4_VERIFIER_SIZE]; } nfs4_verifier;

	struct nfs_stateid4 {
	__be32 seqid;
	char other[NFS4_STATEID_OTHER_SIZE];
	} __attribute__ ((packed));

	typedef struct nfs_stateid4 nfs4_stateid;

	enum nfs_opnum4 {
	OP_ACCESS = 3,
	OP_CLOSE = 4,
	OP_COMMIT = 5,
	OP_CREATE = 6,
	OP_DELEGPURGE = 7,
	OP_DELEGRETURN = 8,
	OP_GETATTR = 9,
	OP_GETFH = 10,
	OP_LINK = 11,
	OP_LOCK = 12,
	OP_LOCKT = 13,
	OP_LOCKU = 14,
	OP_LOOKUP = 15,
	OP_LOOKUPP = 16,
	OP_NVERIFY = 17,
	OP_OPEN = 18,
	OP_OPENATTR = 19,
	OP_OPEN_CONFIRM = 20,
	OP_OPEN_DOWNGRADE = 21,
	OP_PUTFH = 22,
	OP_PUTPUBFH = 23,
	OP_PUTROOTFH = 24,
	OP_READ = 25,
	OP_READDIR = 26,
	OP_READLINK = 27,
	OP_REMOVE = 28,
	OP_RENAME = 29,
	OP_RENEW = 30,
	OP_RESTOREFH = 31,
	OP_SAVEFH = 32,
	OP_SECINFO = 33,
	OP_SETATTR = 34,
	OP_SETCLIENTID = 35,
	OP_SETCLIENTID_CONFIRM = 36,
	OP_VERIFY = 37,
	OP_WRITE = 38,
	OP_RELEASE_LOCKOWNER = 39,

	/* nfs41 */
	OP_BACKCHANNEL_CTL = 40,
	OP_BIND_CONN_TO_SESSION = 41,
	OP_EXCHANGE_ID = 42,
	OP_CREATE_SESSION = 43,
	OP_DESTROY_SESSION = 44,
	OP_FREE_STATEID = 45,
	OP_GET_DIR_DELEGATION = 46,
	OP_GETDEVICEINFO = 47,
	OP_GETDEVICELIST = 48,
	OP_LAYOUTCOMMIT = 49,
	OP_LAYOUTGET = 50,
	OP_LAYOUTRETURN = 51,
	OP_SECINFO_NO_NAME = 52,
	OP_SEQUENCE = 53,
	OP_SET_SSV = 54,
	OP_TEST_STATEID = 55,
	OP_WANT_DELEGATION = 56,
	OP_DESTROY_CLIENTID = 57,
	OP_RECLAIM_COMPLETE = 58,

	OP_ILLEGAL = 10044,
	};

	/*Defining first and last NFS4 operations implemented.
	Needs to be updated if more operations are defined in future.*/

	#define FIRST_NFS4_OP OP_ACCESS
	#define LAST_NFS4_OP OP_RECLAIM_COMPLETE

	enum nfsstat4 {
	NFS4_OK = 0,
	NFS4ERR_PERM = 1,
	NFS4ERR_NOENT = 2,
	NFS4ERR_IO = 5,
	NFS4ERR_NXIO = 6,
	NFS4ERR_ACCESS = 13,
	NFS4ERR_EXIST = 17,
	NFS4ERR_XDEV = 18,
	/* Unused/reserved 19 */
	NFS4ERR_NOTDIR = 20,
	NFS4ERR_ISDIR = 21,
	NFS4ERR_INVAL = 22,
	NFS4ERR_FBIG = 27,
	NFS4ERR_NOSPC = 28,
	NFS4ERR_ROFS = 30,
	NFS4ERR_MLINK = 31,
	NFS4ERR_NAMETOOLONG = 63,
	NFS4ERR_NOTEMPTY = 66,
	NFS4ERR_DQUOT = 69,
	NFS4ERR_STALE = 70,
	NFS4ERR_BADHANDLE = 10001,
	NFS4ERR_BAD_COOKIE = 10003,
	NFS4ERR_NOTSUPP = 10004,
	NFS4ERR_TOOSMALL = 10005,
	NFS4ERR_SERVERFAULT = 10006,
	NFS4ERR_BADTYPE = 10007,
	NFS4ERR_DELAY = 10008,
	NFS4ERR_SAME = 10009,
	NFS4ERR_DENIED = 10010,
	NFS4ERR_EXPIRED = 10011,
	NFS4ERR_LOCKED = 10012,
	NFS4ERR_GRACE = 10013,
	NFS4ERR_FHEXPIRED = 10014,
	NFS4ERR_SHARE_DENIED = 10015,
	NFS4ERR_WRONGSEC = 10016,
	NFS4ERR_CLID_INUSE = 10017,
	NFS4ERR_RESOURCE = 10018,
	NFS4ERR_MOVED = 10019,
	NFS4ERR_NOFILEHANDLE = 10020,
	NFS4ERR_MINOR_VERS_MISMATCH = 10021,
	NFS4ERR_STALE_CLIENTID = 10022,
	NFS4ERR_STALE_STATEID = 10023,
	NFS4ERR_OLD_STATEID = 10024,
	NFS4ERR_BAD_STATEID = 10025,
	NFS4ERR_BAD_SEQID = 10026,
	NFS4ERR_NOT_SAME = 10027,
	NFS4ERR_LOCK_RANGE = 10028,
	NFS4ERR_SYMLINK = 10029,
	NFS4ERR_RESTOREFH = 10030,
	NFS4ERR_LEASE_MOVED = 10031,
	NFS4ERR_ATTRNOTSUPP = 10032,
	NFS4ERR_NO_GRACE = 10033,
	NFS4ERR_RECLAIM_BAD = 10034,
	NFS4ERR_RECLAIM_CONFLICT = 10035,
	NFS4ERR_BADXDR = 10036,
	NFS4ERR_LOCKS_HELD = 10037,
	NFS4ERR_OPENMODE = 10038,
	NFS4ERR_BADOWNER = 10039,
	NFS4ERR_BADCHAR = 10040,
	NFS4ERR_BADNAME = 10041,
	NFS4ERR_BAD_RANGE = 10042,
	NFS4ERR_LOCK_NOTSUPP = 10043,
	NFS4ERR_OP_ILLEGAL = 10044,
	NFS4ERR_DEADLOCK = 10045,
	NFS4ERR_FILE_OPEN = 10046,
	NFS4ERR_ADMIN_REVOKED = 10047,
	NFS4ERR_CB_PATH_DOWN = 10048,

	/* nfs41 */
	NFS4ERR_BADIOMODE = 10049,
	NFS4ERR_BADLAYOUT = 10050,
	NFS4ERR_BAD_SESSION_DIGEST = 10051,
	NFS4ERR_BADSESSION = 10052,
	NFS4ERR_BADSLOT = 10053,
	NFS4ERR_COMPLETE_ALREADY = 10054,
	NFS4ERR_CONN_NOT_BOUND_TO_SESSION = 10055,
	NFS4ERR_DELEG_ALREADY_WANTED = 10056,
	NFS4ERR_BACK_CHAN_BUSY = 10057, /* backchan reqs outstanding */
	NFS4ERR_LAYOUTTRYLATER = 10058,
	NFS4ERR_LAYOUTUNAVAILABLE = 10059,
	NFS4ERR_NOMATCHING_LAYOUT = 10060,
	NFS4ERR_RECALLCONFLICT = 10061,
	NFS4ERR_UNKNOWN_LAYOUTTYPE = 10062,
	NFS4ERR_SEQ_MISORDERED = 10063, /* unexpected seq.id in req */
	NFS4ERR_SEQUENCE_POS = 10064, /* [CB_]SEQ. op not 1st op */
	NFS4ERR_REQ_TOO_BIG = 10065, /* request too big */
	NFS4ERR_REP_TOO_BIG = 10066, /* reply too big */
	NFS4ERR_REP_TOO_BIG_TO_CACHE = 10067, /* rep. not all cached */
	NFS4ERR_RETRY_UNCACHED_REP = 10068, /* retry & rep. uncached */
	NFS4ERR_UNSAFE_COMPOUND = 10069, /* retry/recovery too hard */
	NFS4ERR_TOO_MANY_OPS = 10070, /* too many ops in [CB_]COMP */
	NFS4ERR_OP_NOT_IN_SESSION = 10071, /* op needs [CB_]SEQ. op */
	NFS4ERR_HASH_ALG_UNSUPP = 10072, /* hash alg. not supp. */
	/* Error 10073 is unused. */
	NFS4ERR_CLIENTID_BUSY = 10074, /* clientid has state */
	NFS4ERR_PNFS_IO_HOLE = 10075, /* IO to _SPARSE file hole */
	NFS4ERR_SEQ_FALSE_RETRY = 10076, /* retry not original */
	NFS4ERR_BAD_HIGH_SLOT = 10077, /* sequence arg bad */
	NFS4ERR_DEADSESSION = 10078, /* persistent session dead */
	NFS4ERR_ENCR_ALG_UNSUPP = 10079, /* SSV alg mismatch */
	NFS4ERR_PNFS_NO_LAYOUT = 10080, /* direct I/O with no layout */
	NFS4ERR_NOT_ONLY_OP = 10081, /* bad compound */
	NFS4ERR_WRONG_CRED = 10082, /* permissions:state change */
	NFS4ERR_WRONG_TYPE = 10083, /* current operation mismatch */
	NFS4ERR_DIRDELEG_UNAVAIL = 10084, /* no directory delegation */
	NFS4ERR_REJECT_DELEG = 10085, /* on callback */
	NFS4ERR_RETURNCONFLICT = 10086, /* outstanding layoutreturn */
	NFS4ERR_DELEG_REVOKED = 10087, /* deleg./layout revoked */
	};

	static inline bool seqid_mutating_err(u32 err)
	{
	/* rfc 3530 section 8.1.5: */
	switch (err) {
	case NFS4ERR_STALE_CLIENTID:
	case NFS4ERR_STALE_STATEID:
	case NFS4ERR_BAD_STATEID:
	case NFS4ERR_BAD_SEQID:
	case NFS4ERR_BADXDR:
	case NFS4ERR_RESOURCE:
	case NFS4ERR_NOFILEHANDLE:
	return false;
	};
	return true;
	}

	/*
	* Note: NF4BAD is not actually part of the protocol; it is just used
	* internally by nfsd.
	*/
	enum nfs_ftype4 {
	NF4BAD = 0,
	NF4REG = 1, /* Regular File */
	NF4DIR = 2, /* Directory */
	NF4BLK = 3, /* Special File - block device */
	NF4CHR = 4, /* Special File - character device */
	NF4LNK = 5, /* Symbolic Link */
	NF4SOCK = 6, /* Special File - socket */
	NF4FIFO = 7, /* Special File - fifo */
	NF4ATTRDIR = 8, /* Attribute Directory */
	NF4NAMEDATTR = 9 /* Named Attribute */
	};

	enum open_claim_type4 {
	NFS4_OPEN_CLAIM_NULL = 0,
	NFS4_OPEN_CLAIM_PREVIOUS = 1,
	NFS4_OPEN_CLAIM_DELEGATE_CUR = 2,
	NFS4_OPEN_CLAIM_DELEGATE_PREV = 3,
	NFS4_OPEN_CLAIM_FH = 4, /* 4.1 */
	NFS4_OPEN_CLAIM_DELEG_CUR_FH = 5, /* 4.1 */
	NFS4_OPEN_CLAIM_DELEG_PREV_FH = 6, /* 4.1 */
	};

	enum opentype4 {
	NFS4_OPEN_NOCREATE = 0,
	NFS4_OPEN_CREATE = 1
	};

	enum createmode4 {
	NFS4_CREATE_UNCHECKED = 0,
	NFS4_CREATE_GUARDED = 1,
	NFS4_CREATE_EXCLUSIVE = 2,
	/*
	* New to NFSv4.1. If session is persistent,
	* GUARDED4 MUST be used. Otherwise, use
	* EXCLUSIVE4_1 instead of EXCLUSIVE4.
	*/
	NFS4_CREATE_EXCLUSIVE4_1 = 3
	};

	enum limit_by4 {
	NFS4_LIMIT_SIZE = 1,
	NFS4_LIMIT_BLOCKS = 2
	};

	enum open_delegation_type4 {
	NFS4_OPEN_DELEGATE_NONE = 0,
	NFS4_OPEN_DELEGATE_READ = 1,
	NFS4_OPEN_DELEGATE_WRITE = 2,
	NFS4_OPEN_DELEGATE_NONE_EXT = 3, /* 4.1 */
	};

	enum why_no_delegation4 { /* new to v4.1 */
	WND4_NOT_WANTED = 0,
	WND4_CONTENTION = 1,
	WND4_RESOURCE = 2,
	WND4_NOT_SUPP_FTYPE = 3,
	WND4_WRITE_DELEG_NOT_SUPP_FTYPE = 4,
	WND4_NOT_SUPP_UPGRADE = 5,
	WND4_NOT_SUPP_DOWNGRADE = 6,
	WND4_CANCELLED = 7,
	WND4_IS_DIR = 8,
	};

	enum lock_type4 {
	NFS4_UNLOCK_LT = 0,
	NFS4_READ_LT = 1,
	NFS4_WRITE_LT = 2,
	NFS4_READW_LT = 3,
	NFS4_WRITEW_LT = 4
	};


	/* Mandatory Attributes */
	#define FATTR4_WORD0_SUPPORTED_ATTRS (1UL << 0)
	#define FATTR4_WORD0_TYPE (1UL << 1)
	#define FATTR4_WORD0_FH_EXPIRE_TYPE (1UL << 2)
	#define FATTR4_WORD0_CHANGE (1UL << 3)
	#define FATTR4_WORD0_SIZE (1UL << 4)
	#define FATTR4_WORD0_LINK_SUPPORT (1UL << 5)
	#define FATTR4_WORD0_SYMLINK_SUPPORT (1UL << 6)
	#define FATTR4_WORD0_NAMED_ATTR (1UL << 7)
	#define FATTR4_WORD0_FSID (1UL << 8)
	#define FATTR4_WORD0_UNIQUE_HANDLES (1UL << 9)
	#define FATTR4_WORD0_LEASE_TIME (1UL << 10)
	#define FATTR4_WORD0_RDATTR_ERROR (1UL << 11)
	/* Mandatory in NFSv4.1 */
	#define FATTR4_WORD2_SUPPATTR_EXCLCREAT (1UL << 11)

	/* Recommended Attributes */
	#define FATTR4_WORD0_ACL (1UL << 12)
	#define FATTR4_WORD0_ACLSUPPORT (1UL << 13)
	#define FATTR4_WORD0_ARCHIVE (1UL << 14)
	#define FATTR4_WORD0_CANSETTIME (1UL << 15)
	#define FATTR4_WORD0_CASE_INSENSITIVE (1UL << 16)
	#define FATTR4_WORD0_CASE_PRESERVING (1UL << 17)
	#define FATTR4_WORD0_CHOWN_RESTRICTED (1UL << 18)
	#define FATTR4_WORD0_FILEHANDLE (1UL << 19)
	#define FATTR4_WORD0_FILEID (1UL << 20)
	#define FATTR4_WORD0_FILES_AVAIL (1UL << 21)
	#define FATTR4_WORD0_FILES_FREE (1UL << 22)
	#define FATTR4_WORD0_FILES_TOTAL (1UL << 23)
	#define FATTR4_WORD0_FS_LOCATIONS (1UL << 24)
	#define FATTR4_WORD0_HIDDEN (1UL << 25)
	#define FATTR4_WORD0_HOMOGENEOUS (1UL << 26)
	#define FATTR4_WORD0_MAXFILESIZE (1UL << 27)
	#define FATTR4_WORD0_MAXLINK (1UL << 28)
	#define FATTR4_WORD0_MAXNAME (1UL << 29)
	#define FATTR4_WORD0_MAXREAD (1UL << 30)
	#define FATTR4_WORD0_MAXWRITE (1UL << 31)
	#define FATTR4_WORD1_MIMETYPE (1UL << 0)
	#define FATTR4_WORD1_MODE (1UL << 1)
	#define FATTR4_WORD1_NO_TRUNC (1UL << 2)
	#define FATTR4_WORD1_NUMLINKS (1UL << 3)
	#define FATTR4_WORD1_OWNER (1UL << 4)
	#define FATTR4_WORD1_OWNER_GROUP (1UL << 5)
	#define FATTR4_WORD1_QUOTA_HARD (1UL << 6)
	#define FATTR4_WORD1_QUOTA_SOFT (1UL << 7)
	#define FATTR4_WORD1_QUOTA_USED (1UL << 8)
	#define FATTR4_WORD1_RAWDEV (1UL << 9)
	#define FATTR4_WORD1_SPACE_AVAIL (1UL << 10)
	#define FATTR4_WORD1_SPACE_FREE (1UL << 11)
	#define FATTR4_WORD1_SPACE_TOTAL (1UL << 12)
	#define FATTR4_WORD1_SPACE_USED (1UL << 13)
	#define FATTR4_WORD1_SYSTEM (1UL << 14)
	#define FATTR4_WORD1_TIME_ACCESS (1UL << 15)
	#define FATTR4_WORD1_TIME_ACCESS_SET (1UL << 16)
	#define FATTR4_WORD1_TIME_BACKUP (1UL << 17)
	#define FATTR4_WORD1_TIME_CREATE (1UL << 18)
	#define FATTR4_WORD1_TIME_DELTA (1UL << 19)
	#define FATTR4_WORD1_TIME_METADATA (1UL << 20)
	#define FATTR4_WORD1_TIME_MODIFY (1UL << 21)
	#define FATTR4_WORD1_TIME_MODIFY_SET (1UL << 22)
	#define FATTR4_WORD1_MOUNTED_ON_FILEID (1UL << 23)
	#define FATTR4_WORD1_FS_LAYOUT_TYPES (1UL << 30)
	#define FATTR4_WORD2_LAYOUT_BLKSIZE (1UL << 1)
	#define FATTR4_WORD2_MDSTHRESHOLD (1UL << 4)

	/* MDS threshold bitmap bits */
	#define THRESHOLD_RD (1UL << 0)
	#define THRESHOLD_WR (1UL << 1)
	#define THRESHOLD_RD_IO (1UL << 2)
	#define THRESHOLD_WR_IO (1UL << 3)

	#define NFSPROC4_NULL 0
	#define NFSPROC4_COMPOUND 1
	#define NFS4_VERSION 4
	#define NFS4_MINOR_VERSION 0

	#if defined(CONFIG_NFS_V4_1)
	#define NFS4_MAX_MINOR_VERSION 1
	#else
	#define NFS4_MAX_MINOR_VERSION 0
	#endif /* CONFIG_NFS_V4_1 */

	#define NFS4_DEBUG 1

	/* Index of predefined Linux client operations */

	enum {
	NFSPROC4_CLNT_NULL = 0, /* Unused */
	NFSPROC4_CLNT_READ,
	NFSPROC4_CLNT_WRITE,
	NFSPROC4_CLNT_COMMIT,
	NFSPROC4_CLNT_OPEN,
	NFSPROC4_CLNT_OPEN_CONFIRM,
	NFSPROC4_CLNT_OPEN_NOATTR,
	NFSPROC4_CLNT_OPEN_DOWNGRADE,
	NFSPROC4_CLNT_CLOSE,
	NFSPROC4_CLNT_SETATTR,
	NFSPROC4_CLNT_FSINFO,
	NFSPROC4_CLNT_RENEW,
	NFSPROC4_CLNT_SETCLIENTID,
	NFSPROC4_CLNT_SETCLIENTID_CONFIRM,
	NFSPROC4_CLNT_LOCK,
	NFSPROC4_CLNT_LOCKT,
	NFSPROC4_CLNT_LOCKU,
	NFSPROC4_CLNT_ACCESS,
	NFSPROC4_CLNT_GETATTR,
	NFSPROC4_CLNT_LOOKUP,
	NFSPROC4_CLNT_LOOKUP_ROOT,
	NFSPROC4_CLNT_REMOVE,
	NFSPROC4_CLNT_RENAME,
	NFSPROC4_CLNT_LINK,
	NFSPROC4_CLNT_SYMLINK,
	NFSPROC4_CLNT_CREATE,
	NFSPROC4_CLNT_PATHCONF,
	NFSPROC4_CLNT_STATFS,
	NFSPROC4_CLNT_READLINK,
	NFSPROC4_CLNT_READDIR,
	NFSPROC4_CLNT_SERVER_CAPS,
	NFSPROC4_CLNT_DELEGRETURN,
	NFSPROC4_CLNT_GETACL,
	NFSPROC4_CLNT_SETACL,
	NFSPROC4_CLNT_FS_LOCATIONS,
	NFSPROC4_CLNT_RELEASE_LOCKOWNER,
	NFSPROC4_CLNT_SECINFO,

	/* nfs41 */
	NFSPROC4_CLNT_EXCHANGE_ID,
	NFSPROC4_CLNT_CREATE_SESSION,
	NFSPROC4_CLNT_DESTROY_SESSION,
	NFSPROC4_CLNT_SEQUENCE,
	NFSPROC4_CLNT_GET_LEASE_TIME,
	NFSPROC4_CLNT_RECLAIM_COMPLETE,
	NFSPROC4_CLNT_LAYOUTGET,
	NFSPROC4_CLNT_GETDEVICEINFO,
	NFSPROC4_CLNT_LAYOUTCOMMIT,
	NFSPROC4_CLNT_LAYOUTRETURN,
	NFSPROC4_CLNT_SECINFO_NO_NAME,
	NFSPROC4_CLNT_TEST_STATEID,
	NFSPROC4_CLNT_FREE_STATEID,
	NFSPROC4_CLNT_GETDEVICELIST,
	NFSPROC4_CLNT_BIND_CONN_TO_SESSION,
	NFSPROC4_CLNT_DESTROY_CLIENTID,
	};

	/* nfs41 types */
	struct nfs4_sessionid {
	unsigned char data[NFS4_MAX_SESSIONID_LEN];
	};

	/* Create Session Flags */
	#define SESSION4_PERSIST 0x001
	#define SESSION4_BACK_CHAN 0x002
	#define SESSION4_RDMA 0x004

	#define SESSION4_FLAG_MASK_A 0x007

	enum state_protect_how4 {
	SP4_NONE = 0,
	SP4_MACH_CRED = 1,
	SP4_SSV = 2
	};

	enum pnfs_layouttype {
	LAYOUT_NFSV4_1_FILES = 1,
	LAYOUT_OSD2_OBJECTS = 2,
	LAYOUT_BLOCK_VOLUME = 3,
	};

	/* used for both layout return and recall */
	enum pnfs_layoutreturn_type {
	RETURN_FILE = 1,
	RETURN_FSID = 2,
	RETURN_ALL = 3
	};

	enum pnfs_iomode {
	IOMODE_READ = 1,
	IOMODE_RW = 2,
	IOMODE_ANY = 3,
	};

	enum pnfs_notify_deviceid_type4 {
	NOTIFY_DEVICEID4_CHANGE = 1 << 1,
	NOTIFY_DEVICEID4_DELETE = 1 << 2,
	};

	#define NFL4_UFLG_MASK 0x0000003F
	#define NFL4_UFLG_DENSE 0x00000001
	#define NFL4_UFLG_COMMIT_THRU_MDS 0x00000002
	#define NFL4_UFLG_STRIPE_UNIT_SIZE_MASK 0xFFFFFFC0

	/* Encoded in the loh_body field of type layouthint4 */
	enum filelayout_hint_care4 {
	NFLH4_CARE_DENSE = NFL4_UFLG_DENSE,
	NFLH4_CARE_COMMIT_THRU_MDS = NFL4_UFLG_COMMIT_THRU_MDS,
	NFLH4_CARE_STRIPE_UNIT_SIZE = 0x00000040,
	NFLH4_CARE_STRIPE_COUNT = 0x00000080
	};

	#define NFS4_DEVICEID4_SIZE 16

	struct nfs4_deviceid {
	char data[NFS4_DEVICEID4_SIZE];
	};

	#endif