/* SPDX-License-Identifier: GPL-2.0 */
/*
 *  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>
#include <linux/sunrpc/msg_prot.h>

enum nfs4_acl_whotype {
        NFS4_ACL_WHO_NAMED = 0,
        NFS4_ACL_WHO_OWNER,
        NFS4_ACL_WHO_GROUP,
        NFS4_ACL_WHO_EVERYONE,
};

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[];
};

#define NFS4_MAXLABELLEN        2048

struct nfs4_label {
        uint32_t        lfs;
        uint32_t        pi;
        u32             len;
        char    *label;
};

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

struct nfs4_stateid_struct {
        union {
                char data[NFS4_STATEID_SIZE];
                struct {
                        __be32 seqid;
                        char other[NFS4_STATEID_OTHER_SIZE];
                } __attribute__ ((packed));
        };

        enum {
                NFS4_INVALID_STATEID_TYPE = 0,
                NFS4_SPECIAL_STATEID_TYPE,
                NFS4_OPEN_STATEID_TYPE,
                NFS4_LOCK_STATEID_TYPE,
                NFS4_DELEGATION_STATEID_TYPE,
                NFS4_LAYOUT_STATEID_TYPE,
                NFS4_PNFS_DS_STATEID_TYPE,
                NFS4_REVOKED_STATEID_TYPE,
        } type;
};

typedef struct nfs4_stateid_struct 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,

        /* nfs42 */
        OP_ALLOCATE = 59,
        OP_COPY = 60,
        OP_COPY_NOTIFY = 61,
        OP_DEALLOCATE = 62,
        OP_IO_ADVISE = 63,
        OP_LAYOUTERROR = 64,
        OP_LAYOUTSTATS = 65,
        OP_OFFLOAD_CANCEL = 66,
        OP_OFFLOAD_STATUS = 67,
        OP_READ_PLUS = 68,
        OP_SEEK = 69,
        OP_WRITE_SAME = 70,
        OP_CLONE = 71,

        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_NFS40_OP   OP_RELEASE_LOCKOWNER
#define LAST_NFS41_OP   OP_RECLAIM_COMPLETE
#define LAST_NFS42_OP   OP_CLONE
#define LAST_NFS4_OP    LAST_NFS42_OP

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 */

        /* nfs42 */
        NFS4ERR_PARTNER_NOTSUPP = 10088,
        NFS4ERR_PARTNER_NO_AUTH = 10089,
        NFS4ERR_UNION_NOTSUPP = 10090,
        NFS4ERR_OFFLOAD_DENIED = 10091,
        NFS4ERR_WRONG_LFS = 10092,
        NFS4ERR_BADLABEL = 10093,
        NFS4ERR_OFFLOAD_NO_REQS = 10094,
};

static inline bool seqid_mutating_err(u32 err)
{
        /* See RFC 7530, section 9.1.7 */
        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:
        case NFS4ERR_MOVED:
                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
};

enum change_attr_type4 {
        NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR = 0,
        NFS4_CHANGE_TYPE_IS_VERSION_COUNTER = 1,
        NFS4_CHANGE_TYPE_IS_VERSION_COUNTER_NOPNFS = 2,
        NFS4_CHANGE_TYPE_IS_TIME_METADATA = 3,
        NFS4_CHANGE_TYPE_IS_UNDEFINED = 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_TYPES       (1UL << 0)
#define FATTR4_WORD2_LAYOUT_BLKSIZE     (1UL << 1)
#define FATTR4_WORD2_MDSTHRESHOLD       (1UL << 4)
#define FATTR4_WORD2_CLONE_BLKSIZE      (1UL << 13)
#define FATTR4_WORD2_CHANGE_ATTR_TYPE   (1UL << 15)
#define FATTR4_WORD2_SECURITY_LABEL     (1UL << 16)
#define FATTR4_WORD2_MODE_UMASK         (1UL << 17)

/* 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

#define NFS4_DEBUG 1

/*
 * Index of predefined Linux client operations
 *
 * To ensure that /proc/net/rpc/nfs remains correctly ordered, please
 * append only to this enum when adding new 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,
        NFSPROC4_CLNT_FSID_PRESENT,

        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,

        NFSPROC4_CLNT_SEEK,
        NFSPROC4_CLNT_ALLOCATE,
        NFSPROC4_CLNT_DEALLOCATE,
        NFSPROC4_CLNT_LAYOUTSTATS,
        NFSPROC4_CLNT_CLONE,
        NFSPROC4_CLNT_COPY,
        NFSPROC4_CLNT_OFFLOAD_CANCEL,

        NFSPROC4_CLNT_LOOKUPP,
        NFSPROC4_CLNT_LAYOUTERROR,

        NFSPROC4_CLNT_COPY_NOTIFY,
};

/* 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,
        LAYOUT_FLEX_FILES = 4,
        LAYOUT_SCSI = 5,
        LAYOUT_TYPE_MAX
};

/* 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,
};

enum pnfs_block_volume_type {
        PNFS_BLOCK_VOLUME_SIMPLE        = 0,
        PNFS_BLOCK_VOLUME_SLICE         = 1,
        PNFS_BLOCK_VOLUME_CONCAT        = 2,
        PNFS_BLOCK_VOLUME_STRIPE        = 3,
        PNFS_BLOCK_VOLUME_SCSI          = 4,
};

enum pnfs_block_extent_state {
        PNFS_BLOCK_READWRITE_DATA       = 0,
        PNFS_BLOCK_READ_DATA            = 1,
        PNFS_BLOCK_INVALID_DATA         = 2,
        PNFS_BLOCK_NONE_DATA            = 3,
};

/* on the wire size of a block layout extent */
#define PNFS_BLOCK_EXTENT_SIZE \
        (7 * sizeof(__be32) + NFS4_DEVICEID4_SIZE)

/* on the wire size of a scsi commit range */
#define PNFS_SCSI_RANGE_SIZE \
        (4 * sizeof(__be32))

enum scsi_code_set {
        PS_CODE_SET_BINARY      = 1,
        PS_CODE_SET_ASCII       = 2,
        PS_CODE_SET_UTF8        = 3
};

enum scsi_designator_type {
        PS_DESIGNATOR_T10       = 1,
        PS_DESIGNATOR_EUI64     = 2,
        PS_DESIGNATOR_NAA       = 3,
        PS_DESIGNATOR_NAME      = 8
};

#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];
};

enum data_content4 {
        NFS4_CONTENT_DATA               = 0,
        NFS4_CONTENT_HOLE               = 1,
};

enum pnfs_update_layout_reason {
        PNFS_UPDATE_LAYOUT_UNKNOWN = 0,
        PNFS_UPDATE_LAYOUT_NO_PNFS,
        PNFS_UPDATE_LAYOUT_RD_ZEROLEN,
        PNFS_UPDATE_LAYOUT_MDSTHRESH,
        PNFS_UPDATE_LAYOUT_NOMEM,
        PNFS_UPDATE_LAYOUT_BULK_RECALL,
        PNFS_UPDATE_LAYOUT_IO_TEST_FAIL,
        PNFS_UPDATE_LAYOUT_FOUND_CACHED,
        PNFS_UPDATE_LAYOUT_RETURN,
        PNFS_UPDATE_LAYOUT_RETRY,
        PNFS_UPDATE_LAYOUT_BLOCKED,
        PNFS_UPDATE_LAYOUT_INVALID_OPEN,
        PNFS_UPDATE_LAYOUT_SEND_LAYOUTGET,
        PNFS_UPDATE_LAYOUT_EXIT,
};

#define NFS4_OP_MAP_NUM_LONGS                                   \
        DIV_ROUND_UP(LAST_NFS4_OP, 8 * sizeof(unsigned long))
#define NFS4_OP_MAP_NUM_WORDS \
        (NFS4_OP_MAP_NUM_LONGS * sizeof(unsigned long) / sizeof(u32))
struct nfs4_op_map {
        union {
                unsigned long longs[NFS4_OP_MAP_NUM_LONGS];
                u32 words[NFS4_OP_MAP_NUM_WORDS];
        } u;
};

struct nfs42_netaddr {
        char            netid[RPCBIND_MAXNETIDLEN];
        char            addr[RPCBIND_MAXUADDRLEN + 1];
        u32             netid_len;
        u32             addr_len;
};

enum netloc_type4 {
        NL4_NAME                = 1,
        NL4_URL                 = 2,
        NL4_NETADDR             = 3,
};

struct nl4_server {
        enum netloc_type4       nl4_type;
        union {
                struct { /* NL4_NAME, NL4_URL */
                        int     nl4_str_sz;
                        char    nl4_str[NFS4_OPAQUE_LIMIT + 1];
                };
                struct nfs42_netaddr    nl4_addr; /* NL4_NETADDR */
        } u;
};
#endif