/*

   *  Server-side types for NFSv4.
   *
   *  Copyright (c) 2002 The Regents of the University of Michigan.
   *  All rights reserved.
   *
   *  Kendrick Smith <kmsmith@umich.edu>
   *  Andy Adamson   <andros@umich.edu>
   *
   *  Redistribution and use in source and binary forms, with or without
   *  modification, are permitted provided that the following conditions
   *  are met:
   *
   *  1. Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *  2. Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in the
   *     documentation and/or other materials provided with the distribution.
   *  3. Neither the name of the University nor the names of its
   *     contributors may be used to endorse or promote products derived
   *     from this software without specific prior written permission.
   *
   *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
   *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
   *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   */
  
  #ifndef _LINUX_NFSD_XDR4_H
  #define _LINUX_NFSD_XDR4_H

  #include "state.h"
  #include "nfsd.h"

  
  #define NFSD4_MAX_TAGLEN	128
  #define XDR_LEN(n)                     (((n) + 3) & ~3)

  #define CURRENT_STATE_ID_FLAG (1<<0)
  #define SAVED_STATE_ID_FLAG (1<<1)
  
  #define SET_STATE_ID(c, f) ((c)->sid_flags |= (f))
  #define HAS_STATE_ID(c, f) ((c)->sid_flags & (f))
  #define CLEAR_STATE_ID(c, f) ((c)->sid_flags &= ~(f))

  struct nfsd4_compound_state {

  	struct svc_fh		current_fh;
  	struct svc_fh		save_fh;
  	struct nfs4_stateowner	*replay_owner;

  	struct nfs4_client	*clp;

  	/* For sessions DRC */
  	struct nfsd4_session	*session;
  	struct nfsd4_slot	*slot;

  	int			data_offset;

  	bool                    spo_must_allowed;

  	size_t			iovlen;

  	u32			minorversion;

  	__be32			status;

  	stateid_t	current_stateid;
  	stateid_t	save_stateid;
  	/* to indicate current and saved state id presents */
  	u32		sid_flags;

  };

  static inline bool nfsd4_has_session(struct nfsd4_compound_state *cs)
  {
  	return cs->slot != NULL;
  }

  struct nfsd4_change_info {
  	u32		atomic;

  	bool		change_supported;

  	u32		before_ctime_sec;
  	u32		before_ctime_nsec;

  	u64		before_change;

  	u32		after_ctime_sec;
  	u32		after_ctime_nsec;

  	u64		after_change;

  };
  
  struct nfsd4_access {
  	u32		ac_req_access;      /* request */
  	u32		ac_supported;       /* response */
  	u32		ac_resp_access;     /* response */
  };
  
  struct nfsd4_close {
  	u32		cl_seqid;           /* request */
  	stateid_t	cl_stateid;         /* request+response */

  };
  
  struct nfsd4_commit {
  	u64		co_offset;          /* request */
  	u32		co_count;           /* request */
  	nfs4_verifier	co_verf;            /* response */
  };
  
  struct nfsd4_create {
  	u32		cr_namelen;         /* request */
  	char *		cr_name;            /* request */
  	u32		cr_type;            /* request */
  	union {                             /* request */
  		struct {

  			u32 datalen;
  			char *data;

  		} link;   /* NF4LNK */
  		struct {
  			u32 specdata1;
  			u32 specdata2;
  		} dev;    /* NF4BLK, NF4CHR */
  	} u;

  	u32		cr_bmval[3];        /* request */

  	struct iattr	cr_iattr;           /* request */

  	int		cr_umask;           /* request */

  	struct nfsd4_change_info  cr_cinfo; /* response */
  	struct nfs4_acl *cr_acl;

  	struct xdr_netobj cr_label;

  };

  #define cr_datalen	u.link.datalen
  #define cr_data		u.link.data

  #define cr_specdata1	u.dev.specdata1
  #define cr_specdata2	u.dev.specdata2
  
  struct nfsd4_delegreturn {
  	stateid_t	dr_stateid;
  };
  
  struct nfsd4_getattr {

  	u32		ga_bmval[3];        /* request */

  	struct svc_fh	*ga_fhp;            /* response */
  };
  
  struct nfsd4_link {
  	u32		li_namelen;         /* request */
  	char *		li_name;            /* request */
  	struct nfsd4_change_info  li_cinfo; /* response */
  };
  
  struct nfsd4_lock_denied {
  	clientid_t	ld_clientid;

  	struct xdr_netobj	ld_owner;

  	u64             ld_start;
  	u64             ld_length;
  	u32             ld_type;
  };
  
  struct nfsd4_lock {
  	/* request */
  	u32             lk_type;
  	u32             lk_reclaim;         /* boolean */
  	u64             lk_offset;
  	u64             lk_length;
  	u32             lk_is_new;
  	union {
  		struct {
  			u32             open_seqid;
  			stateid_t       open_stateid;
  			u32             lock_seqid;
  			clientid_t      clientid;
  			struct xdr_netobj owner;
  		} new;
  		struct {
  			stateid_t       lock_stateid;
  			u32             lock_seqid;
  		} old;
  	} v;
  
  	/* response */
  	union {
  		struct {
  			stateid_t               stateid;
  		} ok;
  		struct nfsd4_lock_denied        denied;
  	} u;

  };
  #define lk_new_open_seqid       v.new.open_seqid
  #define lk_new_open_stateid     v.new.open_stateid
  #define lk_new_lock_seqid       v.new.lock_seqid
  #define lk_new_clientid         v.new.clientid
  #define lk_new_owner            v.new.owner
  #define lk_old_lock_stateid     v.old.lock_stateid
  #define lk_old_lock_seqid       v.old.lock_seqid

  #define lk_resp_stateid u.ok.stateid
  #define lk_denied       u.denied
  
  
  struct nfsd4_lockt {
  	u32				lt_type;
  	clientid_t			lt_clientid;
  	struct xdr_netobj		lt_owner;
  	u64				lt_offset;
  	u64				lt_length;

  	struct nfsd4_lock_denied  	lt_denied;
  };
  
   
  struct nfsd4_locku {
  	u32             lu_type;
  	u32             lu_seqid;
  	stateid_t       lu_stateid;
  	u64             lu_offset;
  	u64             lu_length;

  };
  
  
  struct nfsd4_lookup {
  	u32		lo_len;             /* request */
  	char *		lo_name;            /* request */
  };
  
  struct nfsd4_putfh {
  	u32		pf_fhlen;           /* request */
  	char		*pf_fhval;          /* request */
  };
  
  struct nfsd4_open {
  	u32		op_claim_type;      /* request */
  	struct xdr_netobj op_fname;	    /* request - everything but CLAIM_PREV */
  	u32		op_delegate_type;   /* request - CLAIM_PREV only */
  	stateid_t       op_delegate_stateid; /* request - response */

  	u32		op_why_no_deleg;    /* response - DELEG_NONE_EXT only */

  	u32		op_create;     	    /* request */
  	u32		op_createmode;      /* request */

  	int		op_umask;           /* request */

  	u32		op_bmval[3];        /* request */

  	struct iattr	op_iattr;           /* UNCHECKED4, GUARDED4, EXCLUSIVE4_1 */

  	nfs4_verifier	op_verf __attribute__((aligned(32)));
  					    /* EXCLUSIVE4 */

  	clientid_t	op_clientid;        /* request */
  	struct xdr_netobj op_owner;           /* request */
  	u32		op_seqid;           /* request */
  	u32		op_share_access;    /* request */
  	u32		op_share_deny;      /* request */

  	u32		op_deleg_want;      /* request */

  	stateid_t	op_stateid;         /* response */

  	__be32		op_xdr_error;       /* see nfsd4_open_omfg() */

  	u32		op_recall;          /* recall */

  	struct nfsd4_change_info  op_cinfo; /* response */
  	u32		op_rflags;          /* response */

  	bool		op_truncate;        /* used during processing */
  	bool		op_created;         /* used during processing */

  	struct nfs4_openowner *op_openowner; /* used during processing */

  	struct nfs4_file *op_file;          /* used during processing */

  	struct nfs4_ol_stateid *op_stp;	    /* used during processing */

  	struct nfs4_clnt_odstate *op_odstate; /* used during processing */

  	struct nfs4_acl *op_acl;

  	struct xdr_netobj op_label;

  };

  
  struct nfsd4_open_confirm {
  	stateid_t	oc_req_stateid		/* request */;
  	u32		oc_seqid    		/* request */;
  	stateid_t	oc_resp_stateid		/* response */;

  };
  
  struct nfsd4_open_downgrade {
  	stateid_t       od_stateid;
  	u32             od_seqid;

  	u32             od_share_access;	/* request */
  	u32		od_deleg_want;		/* request */
  	u32             od_share_deny;		/* request */

  };
  
  
  struct nfsd4_read {
  	stateid_t	rd_stateid;         /* request */
  	u64		rd_offset;          /* request */
  	u32		rd_length;          /* request */

  	int		rd_vlen;
  	struct file     *rd_filp;

  	bool		rd_tmp_file;

  	
  	struct svc_rqst *rd_rqstp;          /* response */
  	struct svc_fh * rd_fhp;             /* response */
  };
  
  struct nfsd4_readdir {
  	u64		rd_cookie;          /* request */
  	nfs4_verifier	rd_verf;            /* request */
  	u32		rd_dircount;        /* request */
  	u32		rd_maxcount;        /* request */

  	u32		rd_bmval[3];        /* request */

  	struct svc_rqst *rd_rqstp;          /* response */
  	struct svc_fh * rd_fhp;             /* response */
  
  	struct readdir_cd	common;

  	struct xdr_stream	*xdr;
  	int			cookie_offset;

  };
  
  struct nfsd4_release_lockowner {
  	clientid_t        rl_clientid;
  	struct xdr_netobj rl_owner;
  };
  struct nfsd4_readlink {
  	struct svc_rqst *rl_rqstp;          /* request */
  	struct svc_fh *	rl_fhp;             /* request */
  };
  
  struct nfsd4_remove {
  	u32		rm_namelen;         /* request */
  	char *		rm_name;            /* request */
  	struct nfsd4_change_info  rm_cinfo; /* response */
  };
  
  struct nfsd4_rename {
  	u32		rn_snamelen;        /* request */
  	char *		rn_sname;           /* request */
  	u32		rn_tnamelen;        /* request */
  	char *		rn_tname;           /* request */
  	struct nfsd4_change_info  rn_sinfo; /* response */
  	struct nfsd4_change_info  rn_tinfo; /* response */
  };

  struct nfsd4_secinfo {
  	u32 si_namelen;					/* request */
  	char *si_name;					/* request */
  	struct svc_export *si_exp;			/* response */
  };

  struct nfsd4_secinfo_no_name {
  	u32 sin_style;					/* request */
  	struct svc_export *sin_exp;			/* response */
  };

  struct nfsd4_setattr {
  	stateid_t	sa_stateid;         /* request */

  	u32		sa_bmval[3];        /* request */

  	struct iattr	sa_iattr;           /* request */
  	struct nfs4_acl *sa_acl;

  	struct xdr_netobj sa_label;

  };
  
  struct nfsd4_setclientid {
  	nfs4_verifier	se_verf;            /* request */

  	struct xdr_netobj se_name;

  	u32		se_callback_prog;   /* request */
  	u32		se_callback_netid_len;  /* request */
  	char *		se_callback_netid_val;  /* request */
  	u32		se_callback_addr_len;   /* request */
  	char *		se_callback_addr_val;   /* request */
  	u32		se_callback_ident;  /* request */
  	clientid_t	se_clientid;        /* response */
  	nfs4_verifier	se_confirm;         /* response */
  };
  
  struct nfsd4_setclientid_confirm {
  	clientid_t	sc_clientid;
  	nfs4_verifier	sc_confirm;
  };

  struct nfsd4_saved_compoundargs {
  	__be32 *p;
  	__be32 *end;
  	int pagelen;
  	struct page **pagelist;
  };

  struct nfsd4_test_stateid_id {
  	__be32			ts_id_status;
  	stateid_t		ts_id_stateid;
  	struct list_head	ts_id_list;
  };

  struct nfsd4_test_stateid {

  	u32		ts_num_ids;

  	struct list_head ts_stateid_list;

  };

  struct nfsd4_free_stateid {
  	stateid_t	fr_stateid;         /* request */

  };

  /* also used for NVERIFY */
  struct nfsd4_verify {

  	u32		ve_bmval[3];        /* request */

  	u32		ve_attrlen;         /* request */
  	char *		ve_attrval;         /* request */
  };
  
  struct nfsd4_write {
  	stateid_t	wr_stateid;         /* request */
  	u64		wr_offset;          /* request */
  	u32		wr_stable_how;      /* request */
  	u32		wr_buflen;          /* request */

  	struct kvec	wr_head;
  	struct page **	wr_pagelist;        /* request */

  
  	u32		wr_bytes_written;   /* response */
  	u32		wr_how_written;     /* response */
  	nfs4_verifier	wr_verifier;        /* response */
  };

  struct nfsd4_exchange_id {

  	nfs4_verifier	verifier;
  	struct xdr_netobj clname;
  	u32		flags;
  	clientid_t	clientid;
  	u32		seqid;
  	int		spa_how;

  	u32             spo_must_enforce[3];
  	u32             spo_must_allow[3];

  };

  struct nfsd4_sequence {

  	struct nfs4_sessionid	sessionid;		/* request/response */
  	u32			seqid;			/* request/response */
  	u32			slotid;			/* request/response */
  	u32			maxslots;		/* request/response */
  	u32			cachethis;		/* request */
  #if 0
  	u32			target_maxslots;	/* response */

  #endif /* not yet */

  	u32			status_flags;		/* response */

  };
  
  struct nfsd4_destroy_session {

  	struct nfs4_sessionid	sessionid;

  };

  struct nfsd4_destroy_clientid {
  	clientid_t clientid;
  };

  struct nfsd4_reclaim_complete {
  	u32 rca_one_fs;
  };

  struct nfsd4_deviceid {
  	u64			fsid_idx;
  	u32			generation;
  	u32			pad;
  };
  
  struct nfsd4_layout_seg {
  	u32			iomode;
  	u64			offset;
  	u64			length;
  };
  
  struct nfsd4_getdeviceinfo {
  	struct nfsd4_deviceid	gd_devid;	/* request */
  	u32			gd_layout_type;	/* request */
  	u32			gd_maxcount;	/* request */
  	u32			gd_notify_types;/* request - response */
  	void			*gd_device;	/* response */
  };
  
  struct nfsd4_layoutget {
  	u64			lg_minlength;	/* request */
  	u32			lg_signal;	/* request */
  	u32			lg_layout_type;	/* request */
  	u32			lg_maxcount;	/* request */
  	stateid_t		lg_sid;		/* request/response */
  	struct nfsd4_layout_seg	lg_seg;		/* request/response */
  	void			*lg_content;	/* response */
  };
  
  struct nfsd4_layoutcommit {
  	stateid_t		lc_sid;		/* request */
  	struct nfsd4_layout_seg	lc_seg;		/* request */
  	u32			lc_reclaim;	/* request */
  	u32			lc_newoffset;	/* request */
  	u64			lc_last_wr;	/* request */
  	struct timespec		lc_mtime;	/* request */
  	u32			lc_layout_type;	/* request */
  	u32			lc_up_len;	/* layout length */
  	void			*lc_up_layout;	/* decoded by callback */
  	u32			lc_size_chg;	/* boolean for response */
  	u64			lc_newsize;	/* response */
  };
  
  struct nfsd4_layoutreturn {
  	u32			lr_return_type;	/* request */
  	u32			lr_layout_type;	/* request */
  	struct nfsd4_layout_seg	lr_seg;		/* request */
  	u32			lr_reclaim;	/* request */
  	u32			lrf_body_len;	/* request */
  	void			*lrf_body;	/* request */
  	stateid_t		lr_sid;		/* request/response */
  	u32			lrs_present;	/* response */
  };

  struct nfsd4_fallocate {
  	/* request */
  	stateid_t	falloc_stateid;
  	loff_t		falloc_offset;
  	u64		falloc_length;
  };

  struct nfsd4_clone {
  	/* request */
  	stateid_t	cl_src_stateid;
  	stateid_t	cl_dst_stateid;
  	u64		cl_src_pos;
  	u64		cl_dst_pos;
  	u64		cl_count;
  };

  struct nfsd42_write_res {
  	u64			wr_bytes_written;
  	u32			wr_stable_how;
  	nfs4_verifier		wr_verifier;
  };
  
  struct nfsd4_copy {
  	/* request */
  	stateid_t	cp_src_stateid;
  	stateid_t	cp_dst_stateid;
  	u64		cp_src_pos;
  	u64		cp_dst_pos;
  	u64		cp_count;
  
  	/* both */
  	bool		cp_consecutive;
  	bool		cp_synchronous;
  
  	/* response */
  	struct nfsd42_write_res	cp_res;
  };

  struct nfsd4_seek {
  	/* request */
  	stateid_t	seek_stateid;
  	loff_t		seek_offset;
  	u32		seek_whence;
  
  	/* response */
  	u32		seek_eof;
  	loff_t		seek_pos;
  };

  struct nfsd4_op {
  	int					opnum;

  	const struct nfsd4_operation *		opdesc;

  	__be32					status;

  	union nfsd4_op_u {

  		struct nfsd4_access		access;
  		struct nfsd4_close		close;
  		struct nfsd4_commit		commit;
  		struct nfsd4_create		create;
  		struct nfsd4_delegreturn	delegreturn;
  		struct nfsd4_getattr		getattr;
  		struct svc_fh *			getfh;
  		struct nfsd4_link		link;
  		struct nfsd4_lock		lock;
  		struct nfsd4_lockt		lockt;
  		struct nfsd4_locku		locku;
  		struct nfsd4_lookup		lookup;
  		struct nfsd4_verify		nverify;
  		struct nfsd4_open		open;
  		struct nfsd4_open_confirm	open_confirm;
  		struct nfsd4_open_downgrade	open_downgrade;
  		struct nfsd4_putfh		putfh;
  		struct nfsd4_read		read;
  		struct nfsd4_readdir		readdir;
  		struct nfsd4_readlink		readlink;
  		struct nfsd4_remove		remove;
  		struct nfsd4_rename		rename;
  		clientid_t			renew;

  		struct nfsd4_secinfo		secinfo;

  		struct nfsd4_setattr		setattr;
  		struct nfsd4_setclientid	setclientid;
  		struct nfsd4_setclientid_confirm setclientid_confirm;
  		struct nfsd4_verify		verify;
  		struct nfsd4_write		write;
  		struct nfsd4_release_lockowner	release_lockowner;

  
  		/* NFSv4.1 */
  		struct nfsd4_exchange_id	exchange_id;

  		struct nfsd4_backchannel_ctl	backchannel_ctl;

  		struct nfsd4_bind_conn_to_session bind_conn_to_session;

  		struct nfsd4_create_session	create_session;
  		struct nfsd4_destroy_session	destroy_session;

  		struct nfsd4_destroy_clientid	destroy_clientid;

  		struct nfsd4_sequence		sequence;

  		struct nfsd4_reclaim_complete	reclaim_complete;

  		struct nfsd4_test_stateid	test_stateid;

  		struct nfsd4_free_stateid	free_stateid;

  		struct nfsd4_getdeviceinfo	getdeviceinfo;
  		struct nfsd4_layoutget		layoutget;
  		struct nfsd4_layoutcommit	layoutcommit;
  		struct nfsd4_layoutreturn	layoutreturn;

  		struct nfsd4_secinfo_no_name	secinfo_no_name;

  
  		/* NFSv4.2 */

  		struct nfsd4_fallocate		allocate;

  		struct nfsd4_fallocate		deallocate;

  		struct nfsd4_clone		clone;

  		struct nfsd4_copy		copy;

  		struct nfsd4_seek		seek;

  	} u;
  	struct nfs4_replay *			replay;
  };

  bool nfsd4_cache_this_op(struct nfsd4_op *);

  /*
   * Memory needed just for the duration of processing one compound:
   */
  struct svcxdr_tmpbuf {
  	struct svcxdr_tmpbuf *next;
  	char buf[];
  };

  struct nfsd4_compoundargs {
  	/* scratch variables for XDR decode */

  	__be32 *			p;
  	__be32 *			end;

  	struct page **			pagelist;
  	int				pagelen;

  	bool				tail;

  	__be32				tmp[8];
  	__be32 *			tmpp;

  	struct svcxdr_tmpbuf		*to_free;

  
  	struct svc_rqst			*rqstp;
  
  	u32				taglen;
  	char *				tag;
  	u32				minorversion;
  	u32				opcnt;
  	struct nfsd4_op			*ops;
  	struct nfsd4_op			iops[8];

  	int				cachetype;

  };
  
  struct nfsd4_compoundres {
  	/* scratch variables for XDR encode */

  	struct xdr_stream		xdr;

  	struct svc_rqst *		rqstp;
  
  	u32				taglen;
  	char *				tag;
  	u32				opcnt;

  	__be32 *			tagp; /* tag, opcount encode location */
  	struct nfsd4_compound_state	cstate;

  };

  static inline bool nfsd4_is_solo_sequence(struct nfsd4_compoundres *resp)
  {
  	struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;

  	return resp->opcnt == 1 && args->ops[0].opnum == OP_SEQUENCE;

  }
  
  static inline bool nfsd4_not_cached(struct nfsd4_compoundres *resp)
  {

  	return !(resp->cstate.slot->sl_flags & NFSD4_SLOT_CACHETHIS)
  		|| nfsd4_is_solo_sequence(resp);

  }

  static inline bool nfsd4_last_compound_op(struct svc_rqst *rqstp)
  {
  	struct nfsd4_compoundres *resp = rqstp->rq_resp;
  	struct nfsd4_compoundargs *argp = rqstp->rq_argp;
  
  	return argp->opcnt == resp->opcnt;
  }

  const struct nfsd4_operation *OPDESC(struct nfsd4_op *op);

  int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op);

  void warn_on_nonidempotent_op(struct nfsd4_op *op);

  #define NFS4_SVC_XDRSIZE		sizeof(struct nfsd4_compoundargs)
  
  static inline void
  set_change_info(struct nfsd4_change_info *cinfo, struct svc_fh *fhp)
  {

  	BUG_ON(!fhp->fh_pre_saved);

  	cinfo->atomic = (u32)fhp->fh_post_saved;

  	cinfo->change_supported = IS_I_VERSION(d_inode(fhp->fh_dentry));

  
  	cinfo->before_change = fhp->fh_pre_change;
  	cinfo->after_change = fhp->fh_post_change;
  	cinfo->before_ctime_sec = fhp->fh_pre_ctime.tv_sec;
  	cinfo->before_ctime_nsec = fhp->fh_pre_ctime.tv_nsec;
  	cinfo->after_ctime_sec = fhp->fh_post_attr.ctime.tv_sec;
  	cinfo->after_ctime_nsec = fhp->fh_post_attr.ctime.tv_nsec;

  }

  
  bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp);

  int nfs4svc_encode_voidres(struct svc_rqst *, __be32 *);

  int nfs4svc_decode_compoundargs(struct svc_rqst *, __be32 *);

  int nfs4svc_encode_compoundres(struct svc_rqst *, __be32 *);

  __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *, u32);

  void nfsd4_encode_operation(struct nfsd4_compoundres *, struct nfsd4_op *);

  void nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op);

  __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
  		struct svc_fh *fhp, struct svc_export *exp,
  		struct dentry *dentry,
  		u32 *bmval, struct svc_rqst *, int ignore_crossmnt);

  extern __be32 nfsd4_setclientid(struct svc_rqst *rqstp,

  		struct nfsd4_compound_state *, union nfsd4_op_u *u);

  extern __be32 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,

  		struct nfsd4_compound_state *, union nfsd4_op_u *u);

  extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp,

  		struct nfsd4_compound_state *, union nfsd4_op_u *u);
  extern __be32 nfsd4_backchannel_ctl(struct svc_rqst *,
  		struct nfsd4_compound_state *, union nfsd4_op_u *u);
  extern __be32 nfsd4_bind_conn_to_session(struct svc_rqst *,
  		struct nfsd4_compound_state *, union nfsd4_op_u *u);

  extern __be32 nfsd4_create_session(struct svc_rqst *,

  		struct nfsd4_compound_state *, union nfsd4_op_u *u);

  extern __be32 nfsd4_sequence(struct svc_rqst *,

  		struct nfsd4_compound_state *, union nfsd4_op_u *u);

  extern void nfsd4_sequence_done(struct nfsd4_compoundres *resp);

  extern __be32 nfsd4_destroy_session(struct svc_rqst *,

  		struct nfsd4_compound_state *, union nfsd4_op_u *u);
  extern __be32 nfsd4_destroy_clientid(struct svc_rqst *, struct nfsd4_compound_state *,
  		union nfsd4_op_u *u);
  __be32 nfsd4_reclaim_complete(struct svc_rqst *, struct nfsd4_compound_state *,
  		union nfsd4_op_u *u);

  extern __be32 nfsd4_process_open1(struct nfsd4_compound_state *,

  		struct nfsd4_open *open, struct nfsd_net *nn);

  extern __be32 nfsd4_process_open2(struct svc_rqst *rqstp,

  		struct svc_fh *current_fh, struct nfsd4_open *open);

  extern void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate);
  extern void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate,

  		struct nfsd4_open *open);

  extern __be32 nfsd4_open_confirm(struct svc_rqst *rqstp,

  		struct nfsd4_compound_state *, union nfsd4_op_u *u);
  extern __be32 nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
  		union nfsd4_op_u *u);

  extern __be32 nfsd4_open_downgrade(struct svc_rqst *rqstp,

  		struct nfsd4_compound_state *, union nfsd4_op_u *u);

  extern __be32 nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *,

  		union nfsd4_op_u *u);
  extern __be32 nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
  		union nfsd4_op_u *u);
  extern __be32 nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
  		union nfsd4_op_u *u);

  extern __be32

  nfsd4_release_lockowner(struct svc_rqst *rqstp,

  		struct nfsd4_compound_state *, union nfsd4_op_u *u);

  extern void nfsd4_release_compoundargs(struct svc_rqst *rqstp);

  extern __be32 nfsd4_delegreturn(struct svc_rqst *rqstp,

  		struct nfsd4_compound_state *, union nfsd4_op_u *u);
  extern __be32 nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *,
  		union nfsd4_op_u *u);

  extern __be32 nfsd4_test_stateid(struct svc_rqst *rqstp,

  		struct nfsd4_compound_state *, union nfsd4_op_u *);

  extern __be32 nfsd4_free_stateid(struct svc_rqst *rqstp,

  		struct nfsd4_compound_state *, union nfsd4_op_u *);

  extern void nfsd4_bump_seqid(struct nfsd4_compound_state *, __be32 nfserr);

  enum nfsd4_op_flags {
  	ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
  	ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
  	ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
  	/* For rfc 5661 section 2.6.3.1.1: */
  	OP_HANDLES_WRONGSEC = 1 << 3,
  	OP_IS_PUTFH_LIKE = 1 << 4,
  	/*
  	 * These are the ops whose result size we estimate before
  	 * encoding, to avoid performing an op then not being able to
  	 * respond or cache a response.  This includes writes and setattrs
  	 * as well as the operations usually called "nonidempotent":
  	 */
  	OP_MODIFIES_SOMETHING = 1 << 5,
  	/*
  	 * Cache compounds containing these ops in the xid-based drc:
  	 * We use the DRC for compounds containing non-idempotent
  	 * operations, *except* those that are 4.1-specific (since
  	 * sessions provide their own EOS), and except for stateful
  	 * operations other than setclientid and setclientid_confirm
  	 * (since sequence numbers provide EOS for open, lock, etc in
  	 * the v4.0 case).
  	 */
  	OP_CACHEME = 1 << 6,
  	/*
  	 * These are ops which clear current state id.
  	 */
  	OP_CLEAR_STATEID = 1 << 7,

  	/* Most ops return only an error on failure; some may do more: */
  	OP_NONTRIVIAL_ERROR_ENCODE = 1 << 8,

  };
  
  struct nfsd4_operation {
  	__be32 (*op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
  			union nfsd4_op_u *);

  	void (*op_release)(union nfsd4_op_u *);

  	u32 op_flags;
  	char *op_name;
  	/* Try to get response size before operation */
  	u32 (*op_rsize_bop)(struct svc_rqst *, struct nfsd4_op *);
  	void (*op_get_currentstateid)(struct nfsd4_compound_state *,
  			union nfsd4_op_u *);
  	void (*op_set_currentstateid)(struct nfsd4_compound_state *,
  			union nfsd4_op_u *);
  };

  #endif
  
  /*
   * Local variables:
   *  c-basic-offset: 8
   * End:
   */