/* * 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/config.h>#include <linux/types.h>#include <linux/unistd.h>#include <linux/dirent.h>#include <linux/fs.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>#include <linux/nfsd/interface.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 {	int			err;	/* 0, nfserr, or nfserr_eof */};typedef int		(*encode_dent_fn)(struct readdir_cd *, const char *,						int, loff_t, ino_t, unsigned int);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;/* * Function prototypes. */int		nfsd_svc(unsigned short port, int nrservs);int		nfsd_dispatch(struct svc_rqst *rqstp, u32 *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);int		nfsd_lookup(struct svc_rqst *, struct svc_fh *,				const char *, int, struct svc_fh *);int		nfsd_setattr(struct svc_rqst *, struct svc_fh *,				struct iattr *, int, time_t);int		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_V3int		nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);int		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		nfsd_commit(struct svc_rqst *, struct svc_fh *,				loff_t, unsigned long);#endif /* CONFIG_NFSD_V3 */int		nfsd_open(struct svc_rqst *, struct svc_fh *, int,				int, struct file *);void		nfsd_close(struct file *);int		nfsd_read(struct svc_rqst *, struct svc_fh *,				loff_t, struct kvec *,int, unsigned long *);int		nfsd_write(struct svc_rqst *, struct svc_fh *,				loff_t, struct kvec *,int, unsigned long, int *);int		nfsd_readlink(struct svc_rqst *, struct svc_fh *,				char *, int *);int		nfsd_symlink(struct svc_rqst *, struct svc_fh *,				char *name, int len, char *path, int plen,				struct svc_fh *res, struct iattr *);int		nfsd_link(struct svc_rqst *, struct svc_fh *,				char *, int, struct svc_fh *);int		nfsd_rename(struct svc_rqst *,				struct svc_fh *, char *, int,				struct svc_fh *, char *, int);int		nfsd_remove(struct svc_rqst *,				struct svc_fh *, char *, int);int		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);int		nfsd_readdir(struct svc_rqst *, struct svc_fh *,			     loff_t *, struct readdir_cd *, encode_dent_fn);int		nfsd_statfs(struct svc_rqst *, struct svc_fh *,				struct kstatfs *);int		nfsd_notify_change(struct inode *, struct iattr *);int		nfsd_permission(struct svc_export *, struct dentry *, int);/*  * NFSv4 State */#ifdef CONFIG_NFSD_V4void nfs4_state_init(void);void nfs4_state_shutdown(void);time_t nfs4_lease_time(void);void nfs4_reset_lease(time_t leasetime);#elsevoid static inline nfs4_state_init(void){}void static inline nfs4_state_shutdown(void){}time_t static inline nfs4_lease_time(void){return 0;}void static inline nfs4_reset_lease(time_t leasetime){}#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_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)/* 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;static inline int is_fsid(struct svc_fh *fh, struct knfsd_fh *reffh){	if (fh->fh_export->ex_flags & NFSEXP_FSID) {		struct vfsmount *mnt = fh->fh_export->ex_mnt;		if (!old_valid_dev(mnt->mnt_sb->s_dev) ||		    (reffh->fh_version == 1 && reffh->fh_fsid_type == 1))			return 1;	}	return 0;}#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 amount 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 amount 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: *    ACL           (will be supported in a forthcoming patch) *    ARCHIVE       (deprecated anyway) *    FS_LOCATIONS  (will be supported eventually) *    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_HOMOGENEOUS      \ | FATTR4_WORD0_MAXFILESIZE     | FATTR4_WORD0_MAXLINK      | FATTR4_WORD0_MAXNAME          \ | FATTR4_WORD0_MAXREAD         | FATTR4_WORD0_MAXWRITE)#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#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 */