#ifndef _LINUX_NFS_XDR_H
#define _LINUX_NFS_XDR_H

#include <linux/nfsacl.h>

/*
 * To change the maximum rsize and wsize supported by the NFS client, adjust
 * NFS_MAX_FILE_IO_SIZE.  64KB is a typical maximum, but some servers can
 * support a megabyte or more.  The default is left at 4096 bytes, which is
 * reasonable for NFS over UDP.
 */
#define NFS_MAX_FILE_IO_SIZE    (1048576U)
#define NFS_DEF_FILE_IO_SIZE    (4096U)
#define NFS_MIN_FILE_IO_SIZE    (1024U)

struct nfs_fsid {
        uint64_t                major;
        uint64_t                minor;
};

/*
 * Helper for checking equality between 2 fsids.
 */
static inline int nfs_fsid_equal(const struct nfs_fsid *a, const struct nfs_fsid *b)
{
        return a->major == b->major && a->minor == b->minor;
}

struct nfs_fattr {
        unsigned int            valid;          /* which fields are valid */
        umode_t                 mode;
        __u32                   nlink;
        __u32                   uid;
        __u32                   gid;
        dev_t                   rdev;
        __u64                   size;
        union {
                struct {
                        __u32   blocksize;
                        __u32   blocks;
                } nfs2;
                struct {
                        __u64   used;
                } nfs3;
        } du;
        struct nfs_fsid         fsid;
        __u64                   fileid;
        struct timespec         atime;
        struct timespec         mtime;
        struct timespec         ctime;
        __u64                   change_attr;    /* NFSv4 change attribute */
        __u64                   pre_change_attr;/* pre-op NFSv4 change attribute */
        __u64                   pre_size;       /* pre_op_attr.size       */
        struct timespec         pre_mtime;      /* pre_op_attr.mtime      */
        struct timespec         pre_ctime;      /* pre_op_attr.ctime      */
        unsigned long           time_start;
        unsigned long           gencount;
};

#define NFS_ATTR_FATTR_TYPE             (1U << 0)
#define NFS_ATTR_FATTR_MODE             (1U << 1)
#define NFS_ATTR_FATTR_NLINK            (1U << 2)
#define NFS_ATTR_FATTR_OWNER            (1U << 3)
#define NFS_ATTR_FATTR_GROUP            (1U << 4)
#define NFS_ATTR_FATTR_RDEV             (1U << 5)
#define NFS_ATTR_FATTR_SIZE             (1U << 6)
#define NFS_ATTR_FATTR_PRESIZE          (1U << 7)
#define NFS_ATTR_FATTR_BLOCKS_USED      (1U << 8)
#define NFS_ATTR_FATTR_SPACE_USED       (1U << 9)
#define NFS_ATTR_FATTR_FSID             (1U << 10)
#define NFS_ATTR_FATTR_FILEID           (1U << 11)
#define NFS_ATTR_FATTR_ATIME            (1U << 12)
#define NFS_ATTR_FATTR_MTIME            (1U << 13)
#define NFS_ATTR_FATTR_CTIME            (1U << 14)
#define NFS_ATTR_FATTR_PREMTIME         (1U << 15)
#define NFS_ATTR_FATTR_PRECTIME         (1U << 16)
#define NFS_ATTR_FATTR_CHANGE           (1U << 17)
#define NFS_ATTR_FATTR_PRECHANGE        (1U << 18)
#define NFS_ATTR_FATTR_V4_REFERRAL      (1U << 19)      /* NFSv4 referral */

#define NFS_ATTR_FATTR (NFS_ATTR_FATTR_TYPE \
                | NFS_ATTR_FATTR_MODE \
                | NFS_ATTR_FATTR_NLINK \
                | NFS_ATTR_FATTR_OWNER \
                | NFS_ATTR_FATTR_GROUP \
                | NFS_ATTR_FATTR_RDEV \
                | NFS_ATTR_FATTR_SIZE \
                | NFS_ATTR_FATTR_FSID \
                | NFS_ATTR_FATTR_FILEID \
                | NFS_ATTR_FATTR_ATIME \
                | NFS_ATTR_FATTR_MTIME \
                | NFS_ATTR_FATTR_CTIME)
#define NFS_ATTR_FATTR_V2 (NFS_ATTR_FATTR \
                | NFS_ATTR_FATTR_BLOCKS_USED)
#define NFS_ATTR_FATTR_V3 (NFS_ATTR_FATTR \
                | NFS_ATTR_FATTR_SPACE_USED)
#define NFS_ATTR_FATTR_V4 (NFS_ATTR_FATTR \
                | NFS_ATTR_FATTR_SPACE_USED \
                | NFS_ATTR_FATTR_CHANGE)

/*
 * Info on the file system
 */
struct nfs_fsinfo {
        struct nfs_fattr        *fattr; /* Post-op attributes */
        __u32                   rtmax;  /* max.  read transfer size */
        __u32                   rtpref; /* pref. read transfer size */
        __u32                   rtmult; /* reads should be multiple of this */
        __u32                   wtmax;  /* max.  write transfer size */
        __u32                   wtpref; /* pref. write transfer size */
        __u32                   wtmult; /* writes should be multiple of this */
        __u32                   dtpref; /* pref. readdir transfer size */
        __u64                   maxfilesize;
        __u32                   lease_time; /* in seconds */
};

struct nfs_fsstat {
        struct nfs_fattr        *fattr; /* Post-op attributes */
        __u64                   tbytes; /* total size in bytes */
        __u64                   fbytes; /* # of free bytes */
        __u64                   abytes; /* # of bytes available to user */
        __u64                   tfiles; /* # of files */
        __u64                   ffiles; /* # of free files */
        __u64                   afiles; /* # of files available to user */
};

struct nfs2_fsstat {
        __u32                   tsize;  /* Server transfer size */
        __u32                   bsize;  /* Filesystem block size */
        __u32                   blocks; /* No. of "bsize" blocks on filesystem */
        __u32                   bfree;  /* No. of free "bsize" blocks */
        __u32                   bavail; /* No. of available "bsize" blocks */
};

struct nfs_pathconf {
        struct nfs_fattr        *fattr; /* Post-op attributes */
        __u32                   max_link; /* max # of hard links */
        __u32                   max_namelen; /* max name length */
};

struct nfs4_change_info {
        u32                     atomic;
        u64                     before;
        u64                     after;
};

struct nfs_seqid;

/* nfs41 sessions channel attributes */
struct nfs4_channel_attrs {
        u32                     headerpadsz;
        u32                     max_rqst_sz;
        u32                     max_resp_sz;
        u32                     max_resp_sz_cached;
        u32                     max_ops;
        u32                     max_reqs;
};

/* nfs41 sessions slot seqid */
struct nfs4_slot {
        u32                     seq_nr;
};

struct nfs4_sequence_args {
        struct nfs4_session     *sa_session;
        u8                      sa_slotid;
        u8                      sa_cache_this;
};

struct nfs4_sequence_res {
        struct nfs4_session     *sr_session;
        u8                      sr_slotid;      /* slot used to send request */
        unsigned long           sr_renewal_time;
        int                     sr_status;      /* sequence operation status */
};

struct nfs4_get_lease_time_args {
        struct nfs4_sequence_args       la_seq_args;
};

struct nfs4_get_lease_time_res {
        struct nfs_fsinfo              *lr_fsinfo;
        struct nfs4_sequence_res        lr_seq_res;
};

/*
 * Arguments to the open call.
 */
struct nfs_openargs {
        const struct nfs_fh *   fh;
        struct nfs_seqid *      seqid;
        int                     open_flags;
        fmode_t                 fmode;
        __u64                   clientid;
        __u64                   id;
        union {
                struct iattr *  attrs;    /* UNCHECKED, GUARDED */
                nfs4_verifier   verifier; /* EXCLUSIVE */
                nfs4_stateid    delegation;             /* CLAIM_DELEGATE_CUR */
                fmode_t         delegation_type;        /* CLAIM_PREVIOUS */
        } u;
        const struct qstr *     name;
        const struct nfs_server *server;         /* Needed for ID mapping */
        const u32 *             bitmask;
        __u32                   claim;
        struct nfs4_sequence_args       seq_args;
};

struct nfs_openres {
        nfs4_stateid            stateid;
        struct nfs_fh           fh;
        struct nfs4_change_info cinfo;
        __u32                   rflags;
        struct nfs_fattr *      f_attr;
        struct nfs_fattr *      dir_attr;
        struct nfs_seqid *      seqid;
        const struct nfs_server *server;
        fmode_t                 delegation_type;
        nfs4_stateid            delegation;
        __u32                   do_recall;
        __u64                   maxsize;
        __u32                   attrset[NFS4_BITMAP_SIZE];
        struct nfs4_sequence_res        seq_res;
};

/*
 * Arguments to the open_confirm call.
 */
struct nfs_open_confirmargs {
        const struct nfs_fh *   fh;
        nfs4_stateid *          stateid;
        struct nfs_seqid *      seqid;
};

struct nfs_open_confirmres {
        nfs4_stateid            stateid;
        struct nfs_seqid *      seqid;
};

/*
 * Arguments to the close call.
 */
struct nfs_closeargs {
        struct nfs_fh *         fh;
        nfs4_stateid *          stateid;
        struct nfs_seqid *      seqid;
        fmode_t                 fmode;
        const u32 *             bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs_closeres {
        nfs4_stateid            stateid;
        struct nfs_fattr *      fattr;
        struct nfs_seqid *      seqid;
        const struct nfs_server *server;
        struct nfs4_sequence_res        seq_res;
};
/*
 *  * Arguments to the lock,lockt, and locku call.
 *   */
struct nfs_lowner {
        __u64                   clientid;
        __u64                   id;
};

struct nfs_lock_args {
        struct nfs_fh *         fh;
        struct file_lock *      fl;
        struct nfs_seqid *      lock_seqid;
        nfs4_stateid *          lock_stateid;
        struct nfs_seqid *      open_seqid;
        nfs4_stateid *          open_stateid;
        struct nfs_lowner       lock_owner;
        unsigned char           block : 1;
        unsigned char           reclaim : 1;
        unsigned char           new_lock_owner : 1;
        struct nfs4_sequence_args       seq_args;
};

struct nfs_lock_res {
        nfs4_stateid            stateid;
        struct nfs_seqid *      lock_seqid;
        struct nfs_seqid *      open_seqid;
        struct nfs4_sequence_res        seq_res;
};

struct nfs_locku_args {
        struct nfs_fh *         fh;
        struct file_lock *      fl;
        struct nfs_seqid *      seqid;
        nfs4_stateid *          stateid;
        struct nfs4_sequence_args       seq_args;
};

struct nfs_locku_res {
        nfs4_stateid            stateid;
        struct nfs_seqid *      seqid;
        struct nfs4_sequence_res        seq_res;
};

struct nfs_lockt_args {
        struct nfs_fh *         fh;
        struct file_lock *      fl;
        struct nfs_lowner       lock_owner;
        struct nfs4_sequence_args       seq_args;
};

struct nfs_lockt_res {
        struct file_lock *      denied; /* LOCK, LOCKT failed */
        struct nfs4_sequence_res        seq_res;
};

struct nfs4_delegreturnargs {
        const struct nfs_fh *fhandle;
        const nfs4_stateid *stateid;
        const u32 * bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_delegreturnres {
        struct nfs_fattr * fattr;
        const struct nfs_server *server;
        struct nfs4_sequence_res        seq_res;
};

/*
 * Arguments to the read call.
 */
struct nfs_readargs {
        struct nfs_fh *         fh;
        struct nfs_open_context *context;
        __u64                   offset;
        __u32                   count;
        unsigned int            pgbase;
        struct page **          pages;
        struct nfs4_sequence_args       seq_args;
};

struct nfs_readres {
        struct nfs_fattr *      fattr;
        __u32                   count;
        int                     eof;
        struct nfs4_sequence_res        seq_res;
};

/*
 * Arguments to the write call.
 */
struct nfs_writeargs {
        struct nfs_fh *         fh;
        struct nfs_open_context *context;
        __u64                   offset;
        __u32                   count;
        enum nfs3_stable_how    stable;
        unsigned int            pgbase;
        struct page **          pages;
        const u32 *             bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs_writeverf {
        enum nfs3_stable_how    committed;
        __be32                  verifier[2];
};

struct nfs_writeres {
        struct nfs_fattr *      fattr;
        struct nfs_writeverf *  verf;
        __u32                   count;
        const struct nfs_server *server;
        struct nfs4_sequence_res        seq_res;
};

/*
 * Common arguments to the unlink call
 */
struct nfs_removeargs {
        const struct nfs_fh     *fh;
        struct qstr             name;
        const u32 *             bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs_removeres {
        const struct nfs_server *server;
        struct nfs4_change_info cinfo;
        struct nfs_fattr        dir_attr;
        struct nfs4_sequence_res        seq_res;
};

/*
 * Argument struct for decode_entry function
 */
struct nfs_entry {
        __u64                   ino;
        __u64                   cookie,
                                prev_cookie;
        const char *            name;
        unsigned int            len;
        int                     eof;
        struct nfs_fh *         fh;
        struct nfs_fattr *      fattr;
};

/*
 * The following types are for NFSv2 only.
 */
struct nfs_sattrargs {
        struct nfs_fh *         fh;
        struct iattr *          sattr;
};

struct nfs_diropargs {
        struct nfs_fh *         fh;
        const char *            name;
        unsigned int            len;
};

struct nfs_createargs {
        struct nfs_fh *         fh;
        const char *            name;
        unsigned int            len;
        struct iattr *          sattr;
};

struct nfs_renameargs {
        struct nfs_fh *         fromfh;
        const char *            fromname;
        unsigned int            fromlen;
        struct nfs_fh *         tofh;
        const char *            toname;
        unsigned int            tolen;
};

struct nfs_setattrargs {
        struct nfs_fh *                 fh;
        nfs4_stateid                    stateid;
        struct iattr *                  iap;
        const struct nfs_server *       server; /* Needed for name mapping */
        const u32 *                     bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs_setaclargs {
        struct nfs_fh *                 fh;
        size_t                          acl_len;
        unsigned int                    acl_pgbase;
        struct page **                  acl_pages;
        struct nfs4_sequence_args       seq_args;
};

struct nfs_setaclres {
        struct nfs4_sequence_res        seq_res;
};

struct nfs_getaclargs {
        struct nfs_fh *                 fh;
        size_t                          acl_len;
        unsigned int                    acl_pgbase;
        struct page **                  acl_pages;
        struct nfs4_sequence_args       seq_args;
};

struct nfs_getaclres {
        size_t                          acl_len;
        struct nfs4_sequence_res        seq_res;
};

struct nfs_setattrres {
        struct nfs_fattr *              fattr;
        const struct nfs_server *       server;
        struct nfs4_sequence_res        seq_res;
};

struct nfs_linkargs {
        struct nfs_fh *         fromfh;
        struct nfs_fh *         tofh;
        const char *            toname;
        unsigned int            tolen;
};

struct nfs_symlinkargs {
        struct nfs_fh *         fromfh;
        const char *            fromname;
        unsigned int            fromlen;
        struct page **          pages;
        unsigned int            pathlen;
        struct iattr *          sattr;
};

struct nfs_readdirargs {
        struct nfs_fh *         fh;
        __u32                   cookie;
        unsigned int            count;
        struct page **          pages;
};

struct nfs3_getaclargs {
        struct nfs_fh *         fh;
        int                     mask;
        struct page **          pages;
};

struct nfs3_setaclargs {
        struct inode *          inode;
        int                     mask;
        struct posix_acl *      acl_access;
        struct posix_acl *      acl_default;
        size_t                  len;
        unsigned int            npages;
        struct page **          pages;
};

struct nfs_diropok {
        struct nfs_fh *         fh;
        struct nfs_fattr *      fattr;
};

struct nfs_readlinkargs {
        struct nfs_fh *         fh;
        unsigned int            pgbase;
        unsigned int            pglen;
        struct page **          pages;
};

struct nfs3_sattrargs {
        struct nfs_fh *         fh;
        struct iattr *          sattr;
        unsigned int            guard;
        struct timespec         guardtime;
};

struct nfs3_diropargs {
        struct nfs_fh *         fh;
        const char *            name;
        unsigned int            len;
};

struct nfs3_accessargs {
        struct nfs_fh *         fh;
        __u32                   access;
};

struct nfs3_createargs {
        struct nfs_fh *         fh;
        const char *            name;
        unsigned int            len;
        struct iattr *          sattr;
        enum nfs3_createmode    createmode;
        __be32                  verifier[2];
};

struct nfs3_mkdirargs {
        struct nfs_fh *         fh;
        const char *            name;
        unsigned int            len;
        struct iattr *          sattr;
};

struct nfs3_symlinkargs {
        struct nfs_fh *         fromfh;
        const char *            fromname;
        unsigned int            fromlen;
        struct page **          pages;
        unsigned int            pathlen;
        struct iattr *          sattr;
};

struct nfs3_mknodargs {
        struct nfs_fh *         fh;
        const char *            name;
        unsigned int            len;
        enum nfs3_ftype         type;
        struct iattr *          sattr;
        dev_t                   rdev;
};

struct nfs3_renameargs {
        struct nfs_fh *         fromfh;
        const char *            fromname;
        unsigned int            fromlen;
        struct nfs_fh *         tofh;
        const char *            toname;
        unsigned int            tolen;
};

struct nfs3_linkargs {
        struct nfs_fh *         fromfh;
        struct nfs_fh *         tofh;
        const char *            toname;
        unsigned int            tolen;
};

struct nfs3_readdirargs {
        struct nfs_fh *         fh;
        __u64                   cookie;
        __be32                  verf[2];
        int                     plus;
        unsigned int            count;
        struct page **          pages;
};

struct nfs3_diropres {
        struct nfs_fattr *      dir_attr;
        struct nfs_fh *         fh;
        struct nfs_fattr *      fattr;
};

struct nfs3_accessres {
        struct nfs_fattr *      fattr;
        __u32                   access;
};

struct nfs3_readlinkargs {
        struct nfs_fh *         fh;
        unsigned int            pgbase;
        unsigned int            pglen;
        struct page **          pages;
};

struct nfs3_renameres {
        struct nfs_fattr *      fromattr;
        struct nfs_fattr *      toattr;
};

struct nfs3_linkres {
        struct nfs_fattr *      dir_attr;
        struct nfs_fattr *      fattr;
};

struct nfs3_readdirres {
        struct nfs_fattr *      dir_attr;
        __be32 *                verf;
        int                     plus;
};

struct nfs3_getaclres {
        struct nfs_fattr *      fattr;
        int                     mask;
        unsigned int            acl_access_count;
        unsigned int            acl_default_count;
        struct posix_acl *      acl_access;
        struct posix_acl *      acl_default;
};

#ifdef CONFIG_NFS_V4

typedef u64 clientid4;

struct nfs4_accessargs {
        const struct nfs_fh *           fh;
        const u32 *                     bitmask;
        u32                             access;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_accessres {
        const struct nfs_server *       server;
        struct nfs_fattr *              fattr;
        u32                             supported;
        u32                             access;
        struct nfs4_sequence_res        seq_res;
};

struct nfs4_create_arg {
        u32                             ftype;
        union {
                struct {
                        struct page **  pages;
                        unsigned int    len;
                } symlink;   /* NF4LNK */
                struct {
                        u32             specdata1;
                        u32             specdata2;
                } device;    /* NF4BLK, NF4CHR */
        } u;
        const struct qstr *             name;
        const struct nfs_server *       server;
        const struct iattr *            attrs;
        const struct nfs_fh *           dir_fh;
        const u32 *                     bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_create_res {
        const struct nfs_server *       server;
        struct nfs_fh *                 fh;
        struct nfs_fattr *              fattr;
        struct nfs4_change_info         dir_cinfo;
        struct nfs_fattr *              dir_fattr;
        struct nfs4_sequence_res        seq_res;
};

struct nfs4_fsinfo_arg {
        const struct nfs_fh *           fh;
        const u32 *                     bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_fsinfo_res {
        struct nfs_fsinfo              *fsinfo;
        struct nfs4_sequence_res        seq_res;
};

struct nfs4_getattr_arg {
        const struct nfs_fh *           fh;
        const u32 *                     bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_getattr_res {
        const struct nfs_server *       server;
        struct nfs_fattr *              fattr;
        struct nfs4_sequence_res        seq_res;
};

struct nfs4_link_arg {
        const struct nfs_fh *           fh;
        const struct nfs_fh *           dir_fh;
        const struct qstr *             name;
        const u32 *                     bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_link_res {
        const struct nfs_server *       server;
        struct nfs_fattr *              fattr;
        struct nfs4_change_info         cinfo;
        struct nfs_fattr *              dir_attr;
        struct nfs4_sequence_res        seq_res;
};


struct nfs4_lookup_arg {
        const struct nfs_fh *           dir_fh;
        const struct qstr *             name;
        const u32 *                     bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_lookup_res {
        const struct nfs_server *       server;
        struct nfs_fattr *              fattr;
        struct nfs_fh *                 fh;
        struct nfs4_sequence_res        seq_res;
};

struct nfs4_lookup_root_arg {
        const u32 *                     bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_pathconf_arg {
        const struct nfs_fh *           fh;
        const u32 *                     bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_pathconf_res {
        struct nfs_pathconf            *pathconf;
        struct nfs4_sequence_res        seq_res;
};

struct nfs4_readdir_arg {
        const struct nfs_fh *           fh;
        u64                             cookie;
        nfs4_verifier                   verifier;
        u32                             count;
        struct page **                  pages;  /* zero-copy data */
        unsigned int                    pgbase; /* zero-copy data */
        const u32 *                     bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_readdir_res {
        nfs4_verifier                   verifier;
        unsigned int                    pgbase;
        struct nfs4_sequence_res        seq_res;
};

struct nfs4_readlink {
        const struct nfs_fh *           fh;
        unsigned int                    pgbase;
        unsigned int                    pglen;   /* zero-copy data */
        struct page **                  pages;   /* zero-copy data */
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_readlink_res {
        struct nfs4_sequence_res        seq_res;
};

struct nfs4_rename_arg {
        const struct nfs_fh *           old_dir;
        const struct nfs_fh *           new_dir;
        const struct qstr *             old_name;
        const struct qstr *             new_name;
        const u32 *                     bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_rename_res {
        const struct nfs_server *       server;
        struct nfs4_change_info         old_cinfo;
        struct nfs_fattr *              old_fattr;
        struct nfs4_change_info         new_cinfo;
        struct nfs_fattr *              new_fattr;
        struct nfs4_sequence_res        seq_res;
};

#define NFS4_SETCLIENTID_NAMELEN        (127)
struct nfs4_setclientid {
        const nfs4_verifier *           sc_verifier;
        unsigned int                    sc_name_len;
        char                            sc_name[NFS4_SETCLIENTID_NAMELEN + 1];
        u32                             sc_prog;
        unsigned int                    sc_netid_len;
        char                            sc_netid[RPCBIND_MAXNETIDLEN + 1];
        unsigned int                    sc_uaddr_len;
        char                            sc_uaddr[RPCBIND_MAXUADDRLEN + 1];
        u32                             sc_cb_ident;
};

struct nfs4_statfs_arg {
        const struct nfs_fh *           fh;
        const u32 *                     bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_statfs_res {
        struct nfs_fsstat              *fsstat;
        struct nfs4_sequence_res        seq_res;
};

struct nfs4_server_caps_arg {
        struct nfs_fh                  *fhandle;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_server_caps_res {
        u32                             attr_bitmask[2];
        u32                             acl_bitmask;
        u32                             has_links;
        u32                             has_symlinks;
        struct nfs4_sequence_res        seq_res;
};

struct nfs4_string {
        unsigned int len;
        char *data;
};

#define NFS4_PATHNAME_MAXCOMPONENTS 512
struct nfs4_pathname {
        unsigned int ncomponents;
        struct nfs4_string components[NFS4_PATHNAME_MAXCOMPONENTS];
};

#define NFS4_FS_LOCATION_MAXSERVERS 10
struct nfs4_fs_location {
        unsigned int nservers;
        struct nfs4_string servers[NFS4_FS_LOCATION_MAXSERVERS];
        struct nfs4_pathname rootpath;
};

#define NFS4_FS_LOCATIONS_MAXENTRIES 10
struct nfs4_fs_locations {
        struct nfs_fattr fattr;
        const struct nfs_server *server;
        struct nfs4_pathname fs_path;
        int nlocations;
        struct nfs4_fs_location locations[NFS4_FS_LOCATIONS_MAXENTRIES];
};

struct nfs4_fs_locations_arg {
        const struct nfs_fh *dir_fh;
        const struct qstr *name;
        struct page *page;
        const u32 *bitmask;
        struct nfs4_sequence_args       seq_args;
};

struct nfs4_fs_locations_res {
        struct nfs4_fs_locations       *fs_locations;
        struct nfs4_sequence_res        seq_res;
};

#endif /* CONFIG_NFS_V4 */

struct nfstime4 {
        u64     seconds;
        u32     nseconds;
};

#ifdef CONFIG_NFS_V4_1
struct nfs_impl_id4 {
        u32             domain_len;
        char            *domain;
        u32             name_len;
        char            *name;
        struct nfstime4 date;
};

#define NFS4_EXCHANGE_ID_LEN    (48)
struct nfs41_exchange_id_args {
        struct nfs_client               *client;
        nfs4_verifier                   *verifier;
        unsigned int                    id_len;
        char                            id[NFS4_EXCHANGE_ID_LEN];
        u32                             flags;
};

struct server_owner {
        uint64_t                        minor_id;
        uint32_t                        major_id_sz;
        char                            major_id[NFS4_OPAQUE_LIMIT];
};

struct server_scope {
        uint32_t                        server_scope_sz;
        char                            server_scope[NFS4_OPAQUE_LIMIT];
};

struct nfs41_exchange_id_res {
        struct nfs_client               *client;
        u32                             flags;
};

struct nfs41_create_session_args {
        struct nfs_client              *client;
        uint32_t                        flags;
        uint32_t                        cb_program;
        struct nfs4_channel_attrs       fc_attrs;       /* Fore Channel */
        struct nfs4_channel_attrs       bc_attrs;       /* Back Channel */
};

struct nfs41_create_session_res {
        struct nfs_client              *client;
};
#endif /* CONFIG_NFS_V4_1 */

struct nfs_page;

#define NFS_PAGEVEC_SIZE        (8U)

struct nfs_read_data {
        int                     flags;
        struct rpc_task         task;
        struct inode            *inode;
        struct rpc_cred         *cred;
        struct nfs_fattr        fattr;  /* fattr storage */
        struct list_head        pages;  /* Coalesced read requests */
        struct nfs_page         *req;   /* multi ops per nfs_page */
        struct page             **pagevec;
        unsigned int            npages; /* Max length of pagevec */
        struct nfs_readargs args;
        struct nfs_readres  res;
#ifdef CONFIG_NFS_V4
        unsigned long           timestamp;      /* For lease renewal */
#endif
        struct page             *page_array[NFS_PAGEVEC_SIZE];
};

struct nfs_write_data {
        int                     flags;
        struct rpc_task         task;
        struct inode            *inode;
        struct rpc_cred         *cred;
        struct nfs_fattr        fattr;
        struct nfs_writeverf    verf;
        struct list_head        pages;          /* Coalesced requests we wish to flush */
        struct nfs_page         *req;           /* multi ops per nfs_page */
        struct page             **pagevec;
        unsigned int            npages;         /* Max length of pagevec */
        struct nfs_writeargs    args;           /* argument struct */
        struct nfs_writeres     res;            /* result struct */
#ifdef CONFIG_NFS_V4
        unsigned long           timestamp;      /* For lease renewal */
#endif
        struct page             *page_array[NFS_PAGEVEC_SIZE];
};

struct nfs_access_entry;

/*
 * RPC procedure vector for NFSv2/NFSv3 demuxing
 */
struct nfs_rpc_ops {
        u32     version;                /* Protocol version */
        const struct dentry_operations *dentry_ops;
        const struct inode_operations *dir_inode_ops;
        const struct inode_operations *file_inode_ops;

        int     (*getroot) (struct nfs_server *, struct nfs_fh *,
                            struct nfs_fsinfo *);
        int     (*lookupfh)(struct nfs_server *, struct nfs_fh *,
                            struct qstr *, struct nfs_fh *,
                            struct nfs_fattr *);
        int     (*getattr) (struct nfs_server *, struct nfs_fh *,

                            struct nfs_fattr *);
        int     (*setattr) (struct dentry *, struct nfs_fattr *,
                            struct iattr *);
        int     (*lookup)  (struct inode *, struct qstr *,
                            struct nfs_fh *, struct nfs_fattr *);
        int     (*access)  (struct inode *, struct nfs_access_entry *);
        int     (*readlink)(struct inode *, struct page *, unsigned int,
                            unsigned int);
        int     (*create)  (struct inode *, struct dentry *,
                            struct iattr *, int, struct nameidata *);
        int     (*remove)  (struct inode *, struct qstr *);
        void    (*unlink_setup)  (struct rpc_message *, struct inode *dir);
        int     (*unlink_done) (struct rpc_task *, struct inode *);
        int     (*rename)  (struct inode *, struct qstr *,
                            struct inode *, struct qstr *);
        int     (*link)    (struct inode *, struct inode *, struct qstr *);
        int     (*symlink) (struct inode *, struct dentry *, struct page *,
                            unsigned int, struct iattr *);
        int     (*mkdir)   (struct inode *, struct dentry *, struct iattr *);
        int     (*rmdir)   (struct inode *, struct qstr *);
        int     (*readdir) (struct dentry *, struct rpc_cred *,
                            u64, struct page *, unsigned int, int);
        int     (*mknod)   (struct inode *, struct dentry *, struct iattr *,
                            dev_t);
        int     (*statfs)  (struct nfs_server *, struct nfs_fh *,
                            struct nfs_fsstat *);
        int     (*fsinfo)  (struct nfs_server *, struct nfs_fh *,
                            struct nfs_fsinfo *);
        int     (*pathconf) (struct nfs_server *, struct nfs_fh *,
                             struct nfs_pathconf *);
        int     (*set_capabilities)(struct nfs_server *, struct nfs_fh *);
        __be32 *(*decode_dirent)(__be32 *, struct nfs_entry *, int plus);
        void    (*read_setup)   (struct nfs_read_data *, struct rpc_message *);
        int     (*read_done)  (struct rpc_task *, struct nfs_read_data *);
        void    (*write_setup)  (struct nfs_write_data *, struct rpc_message *);
        int     (*write_done)  (struct rpc_task *, struct nfs_write_data *);
        void    (*commit_setup) (struct nfs_write_data *, struct rpc_message *);
        int     (*commit_done) (struct rpc_task *, struct nfs_write_data *);
        int     (*lock)(struct file *, int, struct file_lock *);
        int     (*lock_check_bounds)(const struct file_lock *);
        void    (*clear_acl_cache)(struct inode *);
        void    (*close_context)(struct nfs_open_context *ctx, int);
};

/*
 *      NFS_CALL(getattr, inode, (fattr));
 * into
 *      NFS_PROTO(inode)->getattr(fattr);
 */
#define NFS_CALL(op, inode, args)       NFS_PROTO(inode)->op args

/*
 * Function vectors etc. for the NFS client
 */
extern const struct nfs_rpc_ops nfs_v2_clientops;
extern const struct nfs_rpc_ops nfs_v3_clientops;
extern const struct nfs_rpc_ops nfs_v4_clientops;
extern struct rpc_version       nfs_version2;
extern struct rpc_version       nfs_version3;
extern struct rpc_version       nfs_version4;

extern struct rpc_version       nfsacl_version3;
extern struct rpc_program       nfsacl_program;

#endif