[deliverable/linux.git] / fs / nfsd / nfsd.h

/*
 * Hodge-podge collection of knfsd-related stuff.
 * I will sort this out later.
 *
 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
 */

#ifndef LINUX_NFSD_NFSD_H
#define LINUX_NFSD_NFSD_H

#include <linux/types.h>
#include <linux/mount.h>

#include <linux/nfs.h>
#include <linux/nfs2.h>
#include <linux/nfs3.h>
#include <linux/nfs4.h>
#include <linux/sunrpc/msg_prot.h>

#include <linux/nfsd/debug.h>
#include <linux/nfsd/export.h>
#include <linux/nfsd/stats.h>

/*
 * nfsd version
 */
#define NFSD_SUPPORTED_MINOR_VERSION	1
/*
 * Maximum blocksizes supported by daemon under various circumstances.
 */
#define NFSSVC_MAXBLKSIZE       RPCSVC_MAXPAYLOAD
/* NFSv2 is limited by the protocol specification, see RFC 1094 */
#define NFSSVC_MAXBLKSIZE_V2    (8*1024)


/*
 * Largest number of bytes we need to allocate for an NFS
 * call or reply.  Used to control buffer sizes.  We use
 * the length of v3 WRITE, READDIR and READDIR replies
 * which are an RPC header, up to 26 XDR units of reply
 * data, and some page data.
 *
 * Note that accuracy here doesn't matter too much as the
 * size is rounded up to a page size when allocating space.
 */
#define NFSD_BUFSIZE            ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)

struct readdir_cd {
	__be32			err;	/* 0, nfserr, or nfserr_eof */
};


extern struct svc_program	nfsd_program;
extern struct svc_version	nfsd_version2, nfsd_version3,
				nfsd_version4;
extern u32			nfsd_supported_minorversion;
extern struct mutex		nfsd_mutex;
extern spinlock_t		nfsd_drc_lock;
extern unsigned long		nfsd_drc_max_mem;
extern unsigned long		nfsd_drc_mem_used;

extern const struct seq_operations nfs_exports_op;

/*
 * Function prototypes.
 */
int		nfsd_svc(int nrservs, struct net *net);
int		nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);

int		nfsd_nrthreads(struct net *);
int		nfsd_nrpools(struct net *);
int		nfsd_get_nrthreads(int n, int *, struct net *);
int		nfsd_set_nrthreads(int n, int *, struct net *);
int		nfsd_pool_stats_open(struct inode *, struct file *);
int		nfsd_pool_stats_release(struct inode *, struct file *);

void		nfsd_destroy(struct net *net);

#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
#ifdef CONFIG_NFSD_V2_ACL
extern struct svc_version nfsd_acl_version2;
#else
#define nfsd_acl_version2 NULL
#endif
#ifdef CONFIG_NFSD_V3_ACL
extern struct svc_version nfsd_acl_version3;
#else
#define nfsd_acl_version3 NULL
#endif
#endif

enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
int nfsd_vers(int vers, enum vers_op change);
int nfsd_minorversion(u32 minorversion, enum vers_op change);
void nfsd_reset_versions(void);
int nfsd_create_serv(struct net *net);

extern int nfsd_max_blksize;

static inline int nfsd_v4client(struct svc_rqst *rq)
{
	return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
}

/* 
 * NFSv4 State
 */
#ifdef CONFIG_NFSD_V4
extern unsigned long max_delegations;
void nfs4_state_init(void);
int nfsd4_init_slabs(void);
void nfsd4_free_slabs(void);
int nfs4_state_start(void);
int nfs4_state_start_net(struct net *net);
void nfs4_state_shutdown(void);
void nfs4_state_shutdown_net(struct net *net);
void nfs4_reset_lease(time_t leasetime);
int nfs4_reset_recoverydir(char *recdir);
char * nfs4_recoverydir(void);
#else
static inline void nfs4_state_init(void) { }
static inline int nfsd4_init_slabs(void) { return 0; }
static inline void nfsd4_free_slabs(void) { }
static inline int nfs4_state_start(void) { return 0; }
static inline int nfs4_state_start_net(struct net *net) { return 0; }
static inline void nfs4_state_shutdown(void) { }
static inline void nfs4_state_shutdown_net(struct net *net) { }
static inline void nfs4_reset_lease(time_t leasetime) { }
static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
static inline char * nfs4_recoverydir(void) {return NULL; }
#endif

/*
 * lockd binding
 */
void		nfsd_lockd_init(void);
void		nfsd_lockd_shutdown(void);


/*
 * These macros provide pre-xdr'ed values for faster operation.
 */
#define	nfs_ok			cpu_to_be32(NFS_OK)
#define	nfserr_perm		cpu_to_be32(NFSERR_PERM)
#define	nfserr_noent		cpu_to_be32(NFSERR_NOENT)
#define	nfserr_io		cpu_to_be32(NFSERR_IO)
#define	nfserr_nxio		cpu_to_be32(NFSERR_NXIO)
#define	nfserr_eagain		cpu_to_be32(NFSERR_EAGAIN)
#define	nfserr_acces		cpu_to_be32(NFSERR_ACCES)
#define	nfserr_exist		cpu_to_be32(NFSERR_EXIST)
#define	nfserr_xdev		cpu_to_be32(NFSERR_XDEV)
#define	nfserr_nodev		cpu_to_be32(NFSERR_NODEV)
#define	nfserr_notdir		cpu_to_be32(NFSERR_NOTDIR)
#define	nfserr_isdir		cpu_to_be32(NFSERR_ISDIR)
#define	nfserr_inval		cpu_to_be32(NFSERR_INVAL)
#define	nfserr_fbig		cpu_to_be32(NFSERR_FBIG)
#define	nfserr_nospc		cpu_to_be32(NFSERR_NOSPC)
#define	nfserr_rofs		cpu_to_be32(NFSERR_ROFS)
#define	nfserr_mlink		cpu_to_be32(NFSERR_MLINK)
#define	nfserr_opnotsupp	cpu_to_be32(NFSERR_OPNOTSUPP)
#define	nfserr_nametoolong	cpu_to_be32(NFSERR_NAMETOOLONG)
#define	nfserr_notempty		cpu_to_be32(NFSERR_NOTEMPTY)
#define	nfserr_dquot		cpu_to_be32(NFSERR_DQUOT)
#define	nfserr_stale		cpu_to_be32(NFSERR_STALE)
#define	nfserr_remote		cpu_to_be32(NFSERR_REMOTE)
#define	nfserr_wflush		cpu_to_be32(NFSERR_WFLUSH)
#define	nfserr_badhandle	cpu_to_be32(NFSERR_BADHANDLE)
#define	nfserr_notsync		cpu_to_be32(NFSERR_NOT_SYNC)
#define	nfserr_badcookie	cpu_to_be32(NFSERR_BAD_COOKIE)
#define	nfserr_notsupp		cpu_to_be32(NFSERR_NOTSUPP)
#define	nfserr_toosmall		cpu_to_be32(NFSERR_TOOSMALL)
#define	nfserr_serverfault	cpu_to_be32(NFSERR_SERVERFAULT)
#define	nfserr_badtype		cpu_to_be32(NFSERR_BADTYPE)
#define	nfserr_jukebox		cpu_to_be32(NFSERR_JUKEBOX)
#define	nfserr_denied		cpu_to_be32(NFSERR_DENIED)
#define	nfserr_deadlock		cpu_to_be32(NFSERR_DEADLOCK)
#define nfserr_expired          cpu_to_be32(NFSERR_EXPIRED)
#define	nfserr_bad_cookie	cpu_to_be32(NFSERR_BAD_COOKIE)
#define	nfserr_same		cpu_to_be32(NFSERR_SAME)
#define	nfserr_clid_inuse	cpu_to_be32(NFSERR_CLID_INUSE)
#define	nfserr_stale_clientid	cpu_to_be32(NFSERR_STALE_CLIENTID)
#define	nfserr_resource		cpu_to_be32(NFSERR_RESOURCE)
#define	nfserr_moved		cpu_to_be32(NFSERR_MOVED)
#define	nfserr_nofilehandle	cpu_to_be32(NFSERR_NOFILEHANDLE)
#define	nfserr_minor_vers_mismatch	cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
#define nfserr_share_denied	cpu_to_be32(NFSERR_SHARE_DENIED)
#define nfserr_stale_stateid	cpu_to_be32(NFSERR_STALE_STATEID)
#define nfserr_old_stateid	cpu_to_be32(NFSERR_OLD_STATEID)
#define nfserr_bad_stateid	cpu_to_be32(NFSERR_BAD_STATEID)
#define nfserr_bad_seqid	cpu_to_be32(NFSERR_BAD_SEQID)
#define	nfserr_symlink		cpu_to_be32(NFSERR_SYMLINK)
#define	nfserr_not_same		cpu_to_be32(NFSERR_NOT_SAME)
#define nfserr_lock_range	cpu_to_be32(NFSERR_LOCK_RANGE)
#define	nfserr_restorefh	cpu_to_be32(NFSERR_RESTOREFH)
#define	nfserr_attrnotsupp	cpu_to_be32(NFSERR_ATTRNOTSUPP)
#define	nfserr_bad_xdr		cpu_to_be32(NFSERR_BAD_XDR)
#define	nfserr_openmode		cpu_to_be32(NFSERR_OPENMODE)
#define	nfserr_badowner		cpu_to_be32(NFSERR_BADOWNER)
#define	nfserr_locks_held	cpu_to_be32(NFSERR_LOCKS_HELD)
#define	nfserr_op_illegal	cpu_to_be32(NFSERR_OP_ILLEGAL)
#define	nfserr_grace		cpu_to_be32(NFSERR_GRACE)
#define	nfserr_no_grace		cpu_to_be32(NFSERR_NO_GRACE)
#define	nfserr_reclaim_bad	cpu_to_be32(NFSERR_RECLAIM_BAD)
#define	nfserr_badname		cpu_to_be32(NFSERR_BADNAME)
#define	nfserr_cb_path_down	cpu_to_be32(NFSERR_CB_PATH_DOWN)
#define	nfserr_locked		cpu_to_be32(NFSERR_LOCKED)
#define	nfserr_wrongsec		cpu_to_be32(NFSERR_WRONGSEC)
#define nfserr_badiomode		cpu_to_be32(NFS4ERR_BADIOMODE)
#define nfserr_badlayout		cpu_to_be32(NFS4ERR_BADLAYOUT)
#define nfserr_bad_session_digest	cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
#define nfserr_badsession		cpu_to_be32(NFS4ERR_BADSESSION)
#define nfserr_badslot			cpu_to_be32(NFS4ERR_BADSLOT)
#define nfserr_complete_already		cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
#define nfserr_deleg_already_wanted	cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
#define nfserr_back_chan_busy		cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
#define nfserr_layouttrylater		cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
#define nfserr_layoutunavailable	cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
#define nfserr_nomatching_layout	cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
#define nfserr_recallconflict		cpu_to_be32(NFS4ERR_RECALLCONFLICT)
#define nfserr_unknown_layouttype	cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
#define nfserr_seq_misordered		cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
#define nfserr_sequence_pos		cpu_to_be32(NFS4ERR_SEQUENCE_POS)
#define nfserr_req_too_big		cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
#define nfserr_rep_too_big		cpu_to_be32(NFS4ERR_REP_TOO_BIG)
#define nfserr_rep_too_big_to_cache	cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
#define nfserr_retry_uncached_rep	cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
#define nfserr_unsafe_compound		cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
#define nfserr_too_many_ops		cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
#define nfserr_op_not_in_session	cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
#define nfserr_hash_alg_unsupp		cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
#define nfserr_clientid_busy		cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
#define nfserr_pnfs_io_hole		cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
#define nfserr_seq_false_retry		cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
#define nfserr_bad_high_slot		cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
#define nfserr_deadsession		cpu_to_be32(NFS4ERR_DEADSESSION)
#define nfserr_encr_alg_unsupp		cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
#define nfserr_pnfs_no_layout		cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
#define nfserr_not_only_op		cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
#define nfserr_wrong_cred		cpu_to_be32(NFS4ERR_WRONG_CRED)
#define nfserr_wrong_type		cpu_to_be32(NFS4ERR_WRONG_TYPE)
#define nfserr_dirdeleg_unavail		cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
#define nfserr_reject_deleg		cpu_to_be32(NFS4ERR_REJECT_DELEG)
#define nfserr_returnconflict		cpu_to_be32(NFS4ERR_RETURNCONFLICT)
#define nfserr_deleg_revoked		cpu_to_be32(NFS4ERR_DELEG_REVOKED)

/* error codes for internal use */
/* if a request fails due to kmalloc failure, it gets dropped.
 *  Client should resend eventually
 */
#define	nfserr_dropit		cpu_to_be32(30000)
/* end-of-file indicator in readdir */
#define	nfserr_eof		cpu_to_be32(30001)
/* replay detected */
#define	nfserr_replay_me	cpu_to_be32(11001)
/* nfs41 replay detected */
#define	nfserr_replay_cache	cpu_to_be32(11002)

/* Check for dir entries '.' and '..' */
#define isdotent(n, l)	(l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))

#ifdef CONFIG_NFSD_V4

/* before processing a COMPOUND operation, we have to check that there
 * is enough space in the buffer for XDR encode to succeed.  otherwise,
 * we might process an operation with side effects, and be unable to
 * tell the client that the operation succeeded.
 *
 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
 * needed to encode an "ordinary" _successful_ operation.  (GETATTR,
 * READ, READDIR, and READLINK have their own buffer checks.)  if we
 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
 *
 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
 * care is taken to ensure that we never fall below this level for any
 * reason.
 */
#define	COMPOUND_SLACK_SPACE		140    /* OP_GETFH */
#define COMPOUND_ERR_SLACK_SPACE	12     /* OP_SETATTR */

#define NFSD_LAUNDROMAT_MINTIMEOUT      1   /* seconds */

/*
 * The following attributes are currently not supported by the NFSv4 server:
 *    ARCHIVE       (deprecated anyway)
 *    HIDDEN        (unlikely to be supported any time soon)
 *    MIMETYPE      (unlikely to be supported any time soon)
 *    QUOTA_*       (will be supported in a forthcoming patch)
 *    SYSTEM        (unlikely to be supported any time soon)
 *    TIME_BACKUP   (unlikely to be supported any time soon)
 *    TIME_CREATE   (unlikely to be supported any time soon)
 */
#define NFSD4_SUPPORTED_ATTRS_WORD0                                                         \
(FATTR4_WORD0_SUPPORTED_ATTRS   | FATTR4_WORD0_TYPE         | FATTR4_WORD0_FH_EXPIRE_TYPE   \
 | FATTR4_WORD0_CHANGE          | FATTR4_WORD0_SIZE         | FATTR4_WORD0_LINK_SUPPORT     \
 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR   | FATTR4_WORD0_FSID             \
 | FATTR4_WORD0_UNIQUE_HANDLES  | FATTR4_WORD0_LEASE_TIME   | FATTR4_WORD0_RDATTR_ERROR     \
 | FATTR4_WORD0_ACLSUPPORT      | FATTR4_WORD0_CANSETTIME   | FATTR4_WORD0_CASE_INSENSITIVE \
 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED                             \
 | FATTR4_WORD0_FILEHANDLE      | FATTR4_WORD0_FILEID       | FATTR4_WORD0_FILES_AVAIL      \
 | FATTR4_WORD0_FILES_FREE      | FATTR4_WORD0_FILES_TOTAL  | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS      \
 | FATTR4_WORD0_MAXFILESIZE     | FATTR4_WORD0_MAXLINK      | FATTR4_WORD0_MAXNAME          \
 | FATTR4_WORD0_MAXREAD         | FATTR4_WORD0_MAXWRITE     | FATTR4_WORD0_ACL)

#define NFSD4_SUPPORTED_ATTRS_WORD1                                                         \
(FATTR4_WORD1_MODE              | FATTR4_WORD1_NO_TRUNC     | FATTR4_WORD1_NUMLINKS         \
 | FATTR4_WORD1_OWNER	        | FATTR4_WORD1_OWNER_GROUP  | FATTR4_WORD1_RAWDEV           \
 | FATTR4_WORD1_SPACE_AVAIL     | FATTR4_WORD1_SPACE_FREE   | FATTR4_WORD1_SPACE_TOTAL      \
 | FATTR4_WORD1_SPACE_USED      | FATTR4_WORD1_TIME_ACCESS  | FATTR4_WORD1_TIME_ACCESS_SET  \
 | FATTR4_WORD1_TIME_DELTA   | FATTR4_WORD1_TIME_METADATA    \
 | FATTR4_WORD1_TIME_MODIFY     | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)

#define NFSD4_SUPPORTED_ATTRS_WORD2 0

#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
	NFSD4_SUPPORTED_ATTRS_WORD0

#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
	NFSD4_SUPPORTED_ATTRS_WORD1

#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
	(NFSD4_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SUPPATTR_EXCLCREAT)

static inline u32 nfsd_suppattrs0(u32 minorversion)
{
	return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0
			    : NFSD4_SUPPORTED_ATTRS_WORD0;
}

static inline u32 nfsd_suppattrs1(u32 minorversion)
{
	return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1
			    : NFSD4_SUPPORTED_ATTRS_WORD1;
}

static inline u32 nfsd_suppattrs2(u32 minorversion)
{
	return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD2
			    : NFSD4_SUPPORTED_ATTRS_WORD2;
}

/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
#define NFSD_WRITEONLY_ATTRS_WORD1 \
	(FATTR4_WORD1_TIME_ACCESS_SET   | FATTR4_WORD1_TIME_MODIFY_SET)

/* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
#define NFSD_WRITEABLE_ATTRS_WORD0 \
	(FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
#define NFSD_WRITEABLE_ATTRS_WORD1 \
	(FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
	| FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
#define NFSD_WRITEABLE_ATTRS_WORD2 0

#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
	NFSD_WRITEABLE_ATTRS_WORD0
/*
 * we currently store the exclusive create verifier in the v_{a,m}time
 * attributes so the client can't set these at create time using EXCLUSIVE4_1
 */
#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
	(NFSD_WRITEABLE_ATTRS_WORD1 & \
	 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
	NFSD_WRITEABLE_ATTRS_WORD2

extern int nfsd4_is_junction(struct dentry *dentry);
extern int register_cld_notifier(void);
extern void unregister_cld_notifier(void);
#else /* CONFIG_NFSD_V4 */
static inline int nfsd4_is_junction(struct dentry *dentry)
{
	return 0;
}

#define register_cld_notifier() 0
#define unregister_cld_notifier() do { } while(0)

#endif /* CONFIG_NFSD_V4 */

#endif /* LINUX_NFSD_NFSD_H */
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	* Hodge-podge collection of knfsd-related stuff.
	3	* I will sort this out later.
	4	*
	5	* Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
	6	*/
	7
	8	#ifndef LINUX_NFSD_NFSD_H
	9	#define LINUX_NFSD_NFSD_H
	10
1da177e4	11	#include <linux/types.h>
1da177e4 LT	12	#include <linux/mount.h>
1da177e4 LT	13
c10bd39d BF	14	#include <linux/nfs.h>
	15	#include <linux/nfs2.h>
	16	#include <linux/nfs3.h>
	17	#include <linux/nfs4.h>
	18	#include <linux/sunrpc/msg_prot.h>
	19
1da177e4	20	#include <linux/nfsd/debug.h>
1da177e4	21	#include <linux/nfsd/export.h>
1da177e4	22	#include <linux/nfsd/stats.h>
c10bd39d	23
1da177e4 LT	24	/*
	25	* nfsd version
	26	*/
f3ec22b5	27	#define NFSD_SUPPORTED_MINOR_VERSION 1
c10bd39d BF	28	/*
	29	* Maximum blocksizes supported by daemon under various circumstances.
	30	*/
	31	#define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
	32	/* NFSv2 is limited by the protocol specification, see RFC 1094 */
	33	#define NFSSVC_MAXBLKSIZE_V2 (8*1024)
	34
	35
	36	/*
	37	* Largest number of bytes we need to allocate for an NFS
	38	* call or reply. Used to control buffer sizes. We use
	39	* the length of v3 WRITE, READDIR and READDIR replies
	40	* which are an RPC header, up to 26 XDR units of reply
	41	* data, and some page data.
	42	*
	43	* Note that accuracy here doesn't matter too much as the
	44	* size is rounded up to a page size when allocating space.
	45	*/
	46	#define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
1da177e4	47
1da177e4	48	struct readdir_cd {
131a21c2	49	__be32 err; /* 0, nfserr, or nfserr_eof */
1da177e4	50	};
0a3adade	51
1da177e4 LT	52
	53	extern struct svc_program nfsd_program;
	54	extern struct svc_version nfsd_version2, nfsd_version3,
	55	nfsd_version4;
8daf220a	56	extern u32 nfsd_supported_minorversion;
bedbdd8b	57	extern struct mutex nfsd_mutex;
4bd9b0f4	58	extern spinlock_t nfsd_drc_lock;
697ce9be ZY	59	extern unsigned long nfsd_drc_max_mem;
697ce9be ZY	60	extern unsigned long nfsd_drc_mem_used;
a254b246	61
88e9d34c	62	extern const struct seq_operations nfs_exports_op;
a254b246	63
1da177e4 LT	64	/*
	65	* Function prototypes.
	66	*/
d41a9417	67	int nfsd_svc(int nrservs, struct net *net);
c7afef1f	68	int nfsd_dispatch(struct svc_rqst rqstp, __be32 statp);
1da177e4	69
9dd9845f SK	70	int nfsd_nrthreads(struct net *);
	71	int nfsd_nrpools(struct net *);
	72	int nfsd_get_nrthreads(int n, int , struct net );
3938a0d5	73	int nfsd_set_nrthreads(int n, int , struct net );
7f2e7dc0 BF	74	int nfsd_pool_stats_open(struct inode , struct file );
7f2e7dc0 BF	75	int nfsd_pool_stats_release(struct inode , struct file );
a254b246	76
9dd9845f	77	void nfsd_destroy(struct net *net);
19f7e2ca	78
a257cdd0 AG	79	#if defined(CONFIG_NFSD_V2_ACL) \|\| defined(CONFIG_NFSD_V3_ACL)
	80	#ifdef CONFIG_NFSD_V2_ACL
	81	extern struct svc_version nfsd_acl_version2;
	82	#else
	83	#define nfsd_acl_version2 NULL
	84	#endif
	85	#ifdef CONFIG_NFSD_V3_ACL
	86	extern struct svc_version nfsd_acl_version3;
	87	#else
	88	#define nfsd_acl_version3 NULL
	89	#endif
a257cdd0 AG	90	#endif
a257cdd0 AG	91
6658d3a7 N	92	enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
6658d3a7 N	93	int nfsd_vers(int vers, enum vers_op change);
8daf220a	94	int nfsd_minorversion(u32 minorversion, enum vers_op change);
6658d3a7	95	void nfsd_reset_versions(void);
6777436b	96	int nfsd_create_serv(struct net *net);
6658d3a7	97
596bbe53	98	extern int nfsd_max_blksize;
1da177e4	99
03a816b4 SD	100	static inline int nfsd_v4client(struct svc_rqst *rq)
	101	{
	102	return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
	103	}
	104
1da177e4 LT	105	/*
	106	* NFSv4 State
	107	*/
	108	#ifdef CONFIG_NFSD_V4
697ce9be	109	extern unsigned long max_delegations;
72083396 BS	110	void nfs4_state_init(void);
72083396 BS	111	int nfsd4_init_slabs(void);
e8ff2a84	112	void nfsd4_free_slabs(void);
29ab23cc	113	int nfs4_state_start(void);
f252bc68	114	int nfs4_state_start_net(struct net *net);
1da177e4	115	void nfs4_state_shutdown(void);
f252bc68	116	void nfs4_state_shutdown_net(struct net *net);
1da177e4	117	void nfs4_reset_lease(time_t leasetime);
0964a3d3	118	int nfs4_reset_recoverydir(char *recdir);
87f26f9b	119	char * nfs4_recoverydir(void);
1da177e4	120	#else
72083396 BS	121	static inline void nfs4_state_init(void) { }
72083396 BS	122	static inline int nfsd4_init_slabs(void) { return 0; }
e8ff2a84	123	static inline void nfsd4_free_slabs(void) { }
c0826574	124	static inline int nfs4_state_start(void) { return 0; }
f252bc68	125	static inline int nfs4_state_start_net(struct net *net) { return 0; }
e8ff2a84	126	static inline void nfs4_state_shutdown(void) { }
f252bc68	127	static inline void nfs4_state_shutdown_net(struct net *net) { }
e8ff2a84 BF	128	static inline void nfs4_reset_lease(time_t leasetime) { }
e8ff2a84 BF	129	static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
87f26f9b	130	static inline char * nfs4_recoverydir(void) {return NULL; }
1da177e4 LT	131	#endif
	132
	133	/*
	134	* lockd binding
	135	*/
	136	void nfsd_lockd_init(void);
	137	void nfsd_lockd_shutdown(void);
	138
	139
	140	/*
	141	* These macros provide pre-xdr'ed values for faster operation.
	142	*/
77f18f5e HH	143	#define nfs_ok cpu_to_be32(NFS_OK)
	144	#define nfserr_perm cpu_to_be32(NFSERR_PERM)
	145	#define nfserr_noent cpu_to_be32(NFSERR_NOENT)
	146	#define nfserr_io cpu_to_be32(NFSERR_IO)
	147	#define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
	148	#define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
	149	#define nfserr_acces cpu_to_be32(NFSERR_ACCES)
	150	#define nfserr_exist cpu_to_be32(NFSERR_EXIST)
	151	#define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
	152	#define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
	153	#define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
	154	#define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
	155	#define nfserr_inval cpu_to_be32(NFSERR_INVAL)
	156	#define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
	157	#define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
	158	#define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
	159	#define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
	160	#define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
	161	#define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
	162	#define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
	163	#define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
	164	#define nfserr_stale cpu_to_be32(NFSERR_STALE)
	165	#define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
	166	#define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
	167	#define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
	168	#define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
	169	#define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
	170	#define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
	171	#define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
	172	#define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
	173	#define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
	174	#define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
	175	#define nfserr_denied cpu_to_be32(NFSERR_DENIED)
	176	#define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
	177	#define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
	178	#define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
	179	#define nfserr_same cpu_to_be32(NFSERR_SAME)
	180	#define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
	181	#define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
	182	#define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
	183	#define nfserr_moved cpu_to_be32(NFSERR_MOVED)
	184	#define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
	185	#define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
	186	#define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
	187	#define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
	188	#define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
	189	#define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
	190	#define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
	191	#define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
	192	#define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
f9d7562f	193	#define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
77f18f5e HH	194	#define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
	195	#define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
	196	#define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
	197	#define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
f6af99ec	198	#define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
77f18f5e HH	199	#define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
	200	#define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
	201	#define nfserr_grace cpu_to_be32(NFSERR_GRACE)
	202	#define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
	203	#define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
	204	#define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
	205	#define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
	206	#define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
	207	#define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
10add806 ME	208	#define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
	209	#define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
	210	#define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
	211	#define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
	212	#define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
	213	#define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
	214	#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
	215	#define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
	216	#define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
	217	#define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
	218	#define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
	219	#define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
	220	#define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
	221	#define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
	222	#define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
	223	#define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
	224	#define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
	225	#define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
	226	#define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
	227	#define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
	228	#define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
	229	#define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
	230	#define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
	231	#define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
	232	#define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
	233	#define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
	234	#define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
	235	#define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
	236	#define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
	237	#define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
	238	#define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
	239	#define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
	240	#define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
	241	#define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
	242	#define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
	243	#define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
	244	#define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
	245	#define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
1da177e4 LT	246
	247	/* error codes for internal use */
	248	/* if a request fails due to kmalloc failure, it gets dropped.
	249	* Client should resend eventually
	250	*/
77f18f5e	251	#define nfserr_dropit cpu_to_be32(30000)
1da177e4	252	/* end-of-file indicator in readdir */
77f18f5e	253	#define nfserr_eof cpu_to_be32(30001)
10add806 ME	254	/* replay detected */
	255	#define nfserr_replay_me cpu_to_be32(11001)
	256	/* nfs41 replay detected */
	257	#define nfserr_replay_cache cpu_to_be32(11002)
1da177e4 LT	258
	259	/* Check for dir entries '.' and '..' */
	260	#define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 \|\| n[1] == '.'))
	261
1da177e4 LT	262	#ifdef CONFIG_NFSD_V4
	263
	264	/* before processing a COMPOUND operation, we have to check that there
	265	* is enough space in the buffer for XDR encode to succeed. otherwise,
	266	* we might process an operation with side effects, and be unable to
	267	* tell the client that the operation succeeded.
	268	*
e5710199	269	* COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
1da177e4 LT	270	* needed to encode an "ordinary" _successful_ operation. (GETATTR,
	271	* READ, READDIR, and READLINK have their own buffer checks.) if we
	272	* fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
	273	*
e5710199	274	* COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
1da177e4 LT	275	* needed to encode an operation which has failed with NFS4ERR_RESOURCE.
	276	* care is taken to ensure that we never fall below this level for any
	277	* reason.
	278	*/
	279	#define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
	280	#define COMPOUND_ERR_SLACK_SPACE 12 /* OP_SETATTR */
	281
ecec6e34	282	#define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
1da177e4 LT	283
	284	/*
	285	* The following attributes are currently not supported by the NFSv4 server:
	286	* ARCHIVE (deprecated anyway)
1da177e4 LT	287	* HIDDEN (unlikely to be supported any time soon)
	288	* MIMETYPE (unlikely to be supported any time soon)
	289	* QUOTA_* (will be supported in a forthcoming patch)
	290	* SYSTEM (unlikely to be supported any time soon)
	291	* TIME_BACKUP (unlikely to be supported any time soon)
	292	* TIME_CREATE (unlikely to be supported any time soon)
	293	*/
7e705706	294	#define NFSD4_SUPPORTED_ATTRS_WORD0 \
1da177e4 LT	295	(FATTR4_WORD0_SUPPORTED_ATTRS \| FATTR4_WORD0_TYPE \| FATTR4_WORD0_FH_EXPIRE_TYPE \
	296	\| FATTR4_WORD0_CHANGE \| FATTR4_WORD0_SIZE \| FATTR4_WORD0_LINK_SUPPORT \
	297	\| FATTR4_WORD0_SYMLINK_SUPPORT \| FATTR4_WORD0_NAMED_ATTR \| FATTR4_WORD0_FSID \
	298	\| FATTR4_WORD0_UNIQUE_HANDLES \| FATTR4_WORD0_LEASE_TIME \| FATTR4_WORD0_RDATTR_ERROR \
	299	\| FATTR4_WORD0_ACLSUPPORT \| FATTR4_WORD0_CANSETTIME \| FATTR4_WORD0_CASE_INSENSITIVE \
	300	\| FATTR4_WORD0_CASE_PRESERVING \| FATTR4_WORD0_CHOWN_RESTRICTED \
	301	\| FATTR4_WORD0_FILEHANDLE \| FATTR4_WORD0_FILEID \| FATTR4_WORD0_FILES_AVAIL \
81c3f413	302	\| FATTR4_WORD0_FILES_FREE \| FATTR4_WORD0_FILES_TOTAL \| FATTR4_WORD0_FS_LOCATIONS \| FATTR4_WORD0_HOMOGENEOUS \
1da177e4 LT	303	\| FATTR4_WORD0_MAXFILESIZE \| FATTR4_WORD0_MAXLINK \| FATTR4_WORD0_MAXNAME \
	304	\| FATTR4_WORD0_MAXREAD \| FATTR4_WORD0_MAXWRITE \| FATTR4_WORD0_ACL)
	305
7e705706	306	#define NFSD4_SUPPORTED_ATTRS_WORD1 \
1da177e4 LT	307	(FATTR4_WORD1_MODE \| FATTR4_WORD1_NO_TRUNC \| FATTR4_WORD1_NUMLINKS \
	308	\| FATTR4_WORD1_OWNER \| FATTR4_WORD1_OWNER_GROUP \| FATTR4_WORD1_RAWDEV \
	309	\| FATTR4_WORD1_SPACE_AVAIL \| FATTR4_WORD1_SPACE_FREE \| FATTR4_WORD1_SPACE_TOTAL \
	310	\| FATTR4_WORD1_SPACE_USED \| FATTR4_WORD1_TIME_ACCESS \| FATTR4_WORD1_TIME_ACCESS_SET \
	311	\| FATTR4_WORD1_TIME_DELTA \| FATTR4_WORD1_TIME_METADATA \
	312	\| FATTR4_WORD1_TIME_MODIFY \| FATTR4_WORD1_TIME_MODIFY_SET \| FATTR4_WORD1_MOUNTED_ON_FILEID)
	313
7e705706 AA	314	#define NFSD4_SUPPORTED_ATTRS_WORD2 0
	315
	316	#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
	317	NFSD4_SUPPORTED_ATTRS_WORD0
	318
	319	#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
	320	NFSD4_SUPPORTED_ATTRS_WORD1
	321
	322	#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
8c18f205	323	(NFSD4_SUPPORTED_ATTRS_WORD2 \| FATTR4_WORD2_SUPPATTR_EXCLCREAT)
7e705706 AA	324
	325	static inline u32 nfsd_suppattrs0(u32 minorversion)
	326	{
	327	return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0
	328	: NFSD4_SUPPORTED_ATTRS_WORD0;
	329	}
	330
	331	static inline u32 nfsd_suppattrs1(u32 minorversion)
	332	{
	333	return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD1
	334	: NFSD4_SUPPORTED_ATTRS_WORD1;
	335	}
	336
	337	static inline u32 nfsd_suppattrs2(u32 minorversion)
	338	{
	339	return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD2
	340	: NFSD4_SUPPORTED_ATTRS_WORD2;
	341	}
	342
1da177e4	343	/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
c7e8472c BS	344	#define NFSD_WRITEONLY_ATTRS_WORD1 \
c7e8472c BS	345	(FATTR4_WORD1_TIME_ACCESS_SET \| FATTR4_WORD1_TIME_MODIFY_SET)
1da177e4 LT	346
1da177e4 LT	347	/* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
c7e8472c BS	348	#define NFSD_WRITEABLE_ATTRS_WORD0 \
	349	(FATTR4_WORD0_SIZE \| FATTR4_WORD0_ACL)
	350	#define NFSD_WRITEABLE_ATTRS_WORD1 \
	351	(FATTR4_WORD1_MODE \| FATTR4_WORD1_OWNER \| FATTR4_WORD1_OWNER_GROUP \
	352	\| FATTR4_WORD1_TIME_ACCESS_SET \| FATTR4_WORD1_TIME_MODIFY_SET)
7e705706	353	#define NFSD_WRITEABLE_ATTRS_WORD2 0
1da177e4	354
8c18f205 BH	355	#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
	356	NFSD_WRITEABLE_ATTRS_WORD0
	357	/*
	358	* we currently store the exclusive create verifier in the v_{a,m}time
	359	* attributes so the client can't set these at create time using EXCLUSIVE4_1
	360	*/
	361	#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
	362	(NFSD_WRITEABLE_ATTRS_WORD1 & \
	363	~(FATTR4_WORD1_TIME_ACCESS_SET \| FATTR4_WORD1_TIME_MODIFY_SET))
	364	#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
	365	NFSD_WRITEABLE_ATTRS_WORD2
	366
11fcee02	367	extern int nfsd4_is_junction(struct dentry *dentry);
797a9d79 JL	368	extern int register_cld_notifier(void);
	369	extern void unregister_cld_notifier(void);
	370	#else /* CONFIG_NFSD_V4 */
11fcee02 TM	371	static inline int nfsd4_is_junction(struct dentry *dentry)
	372	{
	373	return 0;
	374	}
	375
797a9d79 JL	376	#define register_cld_notifier() 0
	377	#define unregister_cld_notifier() do { } while(0)
	378
1da177e4 LT	379	#endif /* CONFIG_NFSD_V4 */
1da177e4 LT	380
1da177e4	381	#endif /* LINUX_NFSD_NFSD_H */