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/*

 * linux/include/linux/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/unistd.h>

#include <linux/dirent.h>

#include <linux/fs.h>

#include <linux/posix_acl.h>

#include <linux/mount.h>

#include <linux/nfsd/debug.h>

#include <linux/nfsd/nfsfh.h>

#include <linux/nfsd/export.h>

#include <linux/nfsd/auth.h>

#include <linux/nfsd/stats.h>

/*

 * nfsd version

 */

#define NFSD_VERSION            "0.5"

#define NFSD_SUPPORTED_MINOR_VERSION    0

#ifdef __KERNEL__

/*

 * Special flags for nfsd_permission. These must be different from MAY_READ,

 * MAY_WRITE, and MAY_EXEC.

 */

#define MAY_NOP                 0

#define MAY_SATTR               8

#define MAY_TRUNC               16

#define MAY_LOCK                32

#define MAY_OWNER_OVERRIDE      64

#define MAY_LOCAL_ACCESS        128 /* IRIX doing local access check on device special file*/

#if (MAY_SATTR | MAY_TRUNC | MAY_LOCK | MAY_OWNER_OVERRIDE | MAY_LOCAL_ACCESS) & (MAY_READ | MAY_WRITE | MAY_EXEC)

# error "please use a different value for MAY_SATTR or MAY_TRUNC or MAY_LOCK or MAY_LOCAL_ACCESS or MAY_OWNER_OVERRIDE."

#endif

#define MAY_CREATE              (MAY_EXEC|MAY_WRITE)

#define MAY_REMOVE              (MAY_EXEC|MAY_WRITE|MAY_TRUNC)

/*

 * Callback function for readdir

 */

struct readdir_cd {

        __be32                  err;    /* 0, nfserr, or nfserr_eof */

};

typedef int (*nfsd_dirop_t)(struct inode *, struct dentry *, int, int);

extern struct svc_program       nfsd_program;

extern struct svc_version       nfsd_version2, nfsd_version3,

                                nfsd_version4;

extern struct svc_serv          *nfsd_serv;

/*

 * Function prototypes.

 */

int             nfsd_svc(unsigned short port, int nrservs);

int             nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);

/* nfsd/vfs.c */

int             fh_lock_parent(struct svc_fh *, struct dentry *);

int             nfsd_racache_init(int);

void            nfsd_racache_shutdown(void);

int             nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,

                                struct svc_export **expp);

__be32          nfsd_lookup(struct svc_rqst *, struct svc_fh *,

                                const char *, int, struct svc_fh *);

__be32           nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,

                                const char *, int,

                                struct svc_export **, struct dentry **);

__be32          nfsd_setattr(struct svc_rqst *, struct svc_fh *,

                                struct iattr *, int, time_t);

#ifdef CONFIG_NFSD_V4

__be32          nfsd4_set_nfs4_acl(struct svc_rqst *, struct svc_fh *,

                    struct nfs4_acl *);

int             nfsd4_get_nfs4_acl(struct svc_rqst *, struct dentry *, struct nfs4_acl **);

#endif /* CONFIG_NFSD_V4 */

__be32          nfsd_create(struct svc_rqst *, struct svc_fh *,

                                char *name, int len, struct iattr *attrs,

                                int type, dev_t rdev, struct svc_fh *res);

#ifdef CONFIG_NFSD_V3

__be32          nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);

__be32          nfsd_create_v3(struct svc_rqst *, struct svc_fh *,

                                char *name, int len, struct iattr *attrs,

                                struct svc_fh *res, int createmode,

                                u32 *verifier, int *truncp, int *created);

__be32          nfsd_commit(struct svc_rqst *, struct svc_fh *,

                                loff_t, unsigned long);

#endif /* CONFIG_NFSD_V3 */

__be32          nfsd_open(struct svc_rqst *, struct svc_fh *, int,

                                int, struct file **);

void            nfsd_close(struct file *);

__be32          nfsd_read(struct svc_rqst *, struct svc_fh *, struct file *,

                                loff_t, struct kvec *, int, unsigned long *);

__be32          nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,

                                loff_t, struct kvec *,int, unsigned long, int *);

__be32          nfsd_readlink(struct svc_rqst *, struct svc_fh *,

                                char *, int *);

__be32          nfsd_symlink(struct svc_rqst *, struct svc_fh *,

                                char *name, int len, char *path, int plen,

                                struct svc_fh *res, struct iattr *);

__be32          nfsd_link(struct svc_rqst *, struct svc_fh *,

                                char *, int, struct svc_fh *);

__be32          nfsd_rename(struct svc_rqst *,

                                struct svc_fh *, char *, int,

                                struct svc_fh *, char *, int);

__be32          nfsd_remove(struct svc_rqst *,

                                struct svc_fh *, char *, int);

__be32          nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,

                                char *name, int len);

int             nfsd_truncate(struct svc_rqst *, struct svc_fh *,

                                unsigned long size);

__be32          nfsd_readdir(struct svc_rqst *, struct svc_fh *,

                             loff_t *, struct readdir_cd *, filldir_t);

__be32          nfsd_statfs(struct svc_rqst *, struct svc_fh *,

                                struct kstatfs *);

int             nfsd_notify_change(struct inode *, struct iattr *);

__be32          nfsd_permission(struct svc_rqst *, struct svc_export *,

                                struct dentry *, int);

int             nfsd_sync_dir(struct dentry *dp);

#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

struct posix_acl *nfsd_get_posix_acl(struct svc_fh *, int);

int nfsd_set_posix_acl(struct svc_fh *, int, struct posix_acl *);

#endif

enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };

int nfsd_vers(int vers, enum vers_op change);

void nfsd_reset_versions(void);

int nfsd_create_serv(void);

extern int nfsd_max_blksize;

/*

 * NFSv4 State

 */

#ifdef CONFIG_NFSD_V4

extern unsigned int max_delegations;

int nfs4_state_init(void);

void nfsd4_free_slabs(void);

void nfs4_state_start(void);

void nfs4_state_shutdown(void);

time_t nfs4_lease_time(void);

void nfs4_reset_lease(time_t leasetime);

int nfs4_reset_recoverydir(char *recdir);

#else

static inline int nfs4_state_init(void) { return 0; }

static inline void nfsd4_free_slabs(void) { }

static inline void nfs4_state_start(void) { }

static inline void nfs4_state_shutdown(void) { }

static inline time_t nfs4_lease_time(void) { return 0; }

static inline void nfs4_reset_lease(time_t leasetime) { }

static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }

#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                  __constant_htonl(NFS_OK)

#define nfserr_perm             __constant_htonl(NFSERR_PERM)

#define nfserr_noent            __constant_htonl(NFSERR_NOENT)

#define nfserr_io               __constant_htonl(NFSERR_IO)

#define nfserr_nxio             __constant_htonl(NFSERR_NXIO)

#define nfserr_eagain           __constant_htonl(NFSERR_EAGAIN)

#define nfserr_acces            __constant_htonl(NFSERR_ACCES)

#define nfserr_exist            __constant_htonl(NFSERR_EXIST)

#define nfserr_xdev             __constant_htonl(NFSERR_XDEV)

#define nfserr_nodev            __constant_htonl(NFSERR_NODEV)

#define nfserr_notdir           __constant_htonl(NFSERR_NOTDIR)

#define nfserr_isdir            __constant_htonl(NFSERR_ISDIR)

#define nfserr_inval            __constant_htonl(NFSERR_INVAL)

#define nfserr_fbig             __constant_htonl(NFSERR_FBIG)

#define nfserr_nospc            __constant_htonl(NFSERR_NOSPC)

#define nfserr_rofs             __constant_htonl(NFSERR_ROFS)

#define nfserr_mlink            __constant_htonl(NFSERR_MLINK)

#define nfserr_opnotsupp        __constant_htonl(NFSERR_OPNOTSUPP)

#define nfserr_nametoolong      __constant_htonl(NFSERR_NAMETOOLONG)

#define nfserr_notempty         __constant_htonl(NFSERR_NOTEMPTY)

#define nfserr_dquot            __constant_htonl(NFSERR_DQUOT)

#define nfserr_stale            __constant_htonl(NFSERR_STALE)

#define nfserr_remote           __constant_htonl(NFSERR_REMOTE)

#define nfserr_wflush           __constant_htonl(NFSERR_WFLUSH)

#define nfserr_badhandle        __constant_htonl(NFSERR_BADHANDLE)

#define nfserr_notsync          __constant_htonl(NFSERR_NOT_SYNC)

#define nfserr_badcookie        __constant_htonl(NFSERR_BAD_COOKIE)

#define nfserr_notsupp          __constant_htonl(NFSERR_NOTSUPP)

#define nfserr_toosmall         __constant_htonl(NFSERR_TOOSMALL)

#define nfserr_serverfault      __constant_htonl(NFSERR_SERVERFAULT)

#define nfserr_badtype          __constant_htonl(NFSERR_BADTYPE)

#define nfserr_jukebox          __constant_htonl(NFSERR_JUKEBOX)

#define nfserr_denied           __constant_htonl(NFSERR_DENIED)

#define nfserr_deadlock         __constant_htonl(NFSERR_DEADLOCK)

#define nfserr_expired          __constant_htonl(NFSERR_EXPIRED)

#define nfserr_bad_cookie       __constant_htonl(NFSERR_BAD_COOKIE)

#define nfserr_same             __constant_htonl(NFSERR_SAME)

#define nfserr_clid_inuse       __constant_htonl(NFSERR_CLID_INUSE)

#define nfserr_stale_clientid   __constant_htonl(NFSERR_STALE_CLIENTID)

#define nfserr_resource         __constant_htonl(NFSERR_RESOURCE)

#define nfserr_moved            __constant_htonl(NFSERR_MOVED)

#define nfserr_nofilehandle     __constant_htonl(NFSERR_NOFILEHANDLE)

#define nfserr_minor_vers_mismatch      __constant_htonl(NFSERR_MINOR_VERS_MISMATCH)

#define nfserr_share_denied     __constant_htonl(NFSERR_SHARE_DENIED)

#define nfserr_stale_stateid    __constant_htonl(NFSERR_STALE_STATEID)

#define nfserr_old_stateid      __constant_htonl(NFSERR_OLD_STATEID)

#define nfserr_bad_stateid      __constant_htonl(NFSERR_BAD_STATEID)

#define nfserr_bad_seqid        __constant_htonl(NFSERR_BAD_SEQID)

#define nfserr_symlink          __constant_htonl(NFSERR_SYMLINK)

#define nfserr_not_same         __constant_htonl(NFSERR_NOT_SAME)

#define nfserr_restorefh        __constant_htonl(NFSERR_RESTOREFH)

#define nfserr_attrnotsupp      __constant_htonl(NFSERR_ATTRNOTSUPP)

#define nfserr_bad_xdr          __constant_htonl(NFSERR_BAD_XDR)

#define nfserr_openmode         __constant_htonl(NFSERR_OPENMODE)

#define nfserr_locks_held       __constant_htonl(NFSERR_LOCKS_HELD)

#define nfserr_op_illegal       __constant_htonl(NFSERR_OP_ILLEGAL)

#define nfserr_grace            __constant_htonl(NFSERR_GRACE)

#define nfserr_no_grace         __constant_htonl(NFSERR_NO_GRACE)

#define nfserr_reclaim_bad      __constant_htonl(NFSERR_RECLAIM_BAD)

#define nfserr_badname          __constant_htonl(NFSERR_BADNAME)

#define nfserr_cb_path_down     __constant_htonl(NFSERR_CB_PATH_DOWN)

#define nfserr_locked           __constant_htonl(NFSERR_LOCKED)

#define nfserr_wrongsec         __constant_htonl(NFSERR_WRONGSEC)

#define nfserr_replay_me        __constant_htonl(NFSERR_REPLAY_ME)

/* error codes for internal use */

/* if a request fails due to kmalloc failure, it gets dropped.

 *  Client should resend eventually

 */

#define nfserr_dropit           __constant_htonl(30000)

/* end-of-file indicator in readdir */

#define nfserr_eof              __constant_htonl(30001)

/* Check for dir entries '.' and '..' */

#define isdotent(n, l)  (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))

/*

 * Time of server startup

 */

extern struct timeval   nfssvc_boot;

#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_LEASE_TIME                 (nfs4_lease_time())

#define NFSD_LAUNDROMAT_MINTIMEOUT      10   /* 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 NFSD_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 NFSD_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)

/* 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_METADATA | FATTR4_WORD1_TIME_MODIFY_SET)

#endif /* CONFIG_NFSD_V4 */

#endif /* __KERNEL__ */

#endif /* LINUX_NFSD_NFSD_H */