nfs.h

RTEMS (Real-Time Executive for Multiprocessor Systems) is a free open source real-time operating sys

/* Flag values for r_flags */
#define R_TIMING	0x01		/* timing request (in mntp) */
#define R_SENT		0x02		/* request has been sent */
#define	R_SOFTTERM	0x04		/* soft mnt, too many retries */
#define	R_INTR		0x08		/* intr mnt, signal pending */
#define	R_SOCKERR	0x10		/* Fatal error on socket */
#define	R_TPRINTFMSG	0x20		/* Did a tprintf msg. */
#define	R_MUSTRESEND	0x40		/* Must resend request */
#define	R_GETONEREP	0x80		/* Probe for one reply only */

/*
 * A list of nfssvc_sock structures is maintained with all the sockets
 * that require service by the nfsd.
 * The nfsuid structs hang off of the nfssvc_sock structs in both lru
 * and uid hash lists.
 */
#ifndef NFS_UIDHASHSIZ
#define	NFS_UIDHASHSIZ	29	/* Tune the size of nfssvc_sock with this */
#endif
#define	NUIDHASH(sock, uid) \
	(&(sock)->ns_uidhashtbl[(uid) % NFS_UIDHASHSIZ])
#ifndef NFS_WDELAYHASHSIZ
#define	NFS_WDELAYHASHSIZ 16	/* and with this */
#endif
#define	NWDELAYHASH(sock, f) \
	(&(sock)->ns_wdelayhashtbl[(*((u_long *)(f))) % NFS_WDELAYHASHSIZ])
#ifndef NFS_MUIDHASHSIZ
#define NFS_MUIDHASHSIZ	63	/* Tune the size of nfsmount with this */
#endif
#define	NMUIDHASH(nmp, uid) \
	(&(nmp)->nm_uidhashtbl[(uid) % NFS_MUIDHASHSIZ])
#define	NFSNOHASH(fhsum) \
	(&nfsnodehashtbl[(fhsum) & nfsnodehash])

/*
 * Network address hash list element
 */
union nethostaddr {
	u_long had_inetaddr;
	struct mbuf *had_nam;
};

struct nfsuid {
	TAILQ_ENTRY(nfsuid) nu_lru;	/* LRU chain */
	LIST_ENTRY(nfsuid) nu_hash;	/* Hash list */
	int		nu_flag;	/* Flags */
	union nethostaddr nu_haddr;	/* Host addr. for dgram sockets */
	struct ucred	nu_cr;		/* Cred uid mapped to */
	int		nu_expire;	/* Expiry time (sec) */
	struct timeval	nu_timestamp;	/* Kerb. timestamp */
	u_long		nu_nickname;	/* Nickname on server */
	NFSKERBKEY_T	nu_key;		/* and session key */
};

#define	nu_inetaddr	nu_haddr.had_inetaddr
#define	nu_nam		nu_haddr.had_nam
/* Bits for nu_flag */
#define	NU_INETADDR	0x1
#define NU_NAM		0x2
#define NU_NETFAM(u)	(((u)->nu_flag & NU_INETADDR) ? AF_INET : AF_ISO)

struct nfssvc_sock {
	TAILQ_ENTRY(nfssvc_sock) ns_chain;	/* List of all nfssvc_sock's */
	TAILQ_HEAD(, nfsuid) ns_uidlruhead;
	struct file	*ns_fp;
	struct socket	*ns_so;
	struct mbuf	*ns_nam;
	struct mbuf	*ns_raw;
	struct mbuf	*ns_rawend;
	struct mbuf	*ns_rec;
	struct mbuf	*ns_recend;
	struct mbuf	*ns_frag;
	int		ns_flag;
	int		ns_solock;
	int		ns_cc;
	int		ns_reclen;
	int		ns_numuids;
	u_long		ns_sref;
	LIST_HEAD(, nfsrv_descript) ns_tq;	/* Write gather lists */
	LIST_HEAD(, nfsuid) ns_uidhashtbl[NFS_UIDHASHSIZ];
	LIST_HEAD(nfsrvw_delayhash, nfsrv_descript) ns_wdelayhashtbl[NFS_WDELAYHASHSIZ];
};

/* Bits for "ns_flag" */
#define	SLP_VALID	0x01
#define	SLP_DOREC	0x02
#define	SLP_NEEDQ	0x04
#define	SLP_DISCONN	0x08
#define	SLP_GETSTREAM	0x10
#define	SLP_LASTFRAG	0x20
#define SLP_ALLFLAGS	0xff

extern TAILQ_HEAD(nfssvc_sockhead, nfssvc_sock) nfssvc_sockhead;
extern int nfssvc_sockhead_flag;
#define	SLP_INIT	0x01
#define	SLP_WANTINIT	0x02

/*
 * One of these structures is allocated for each nfsd.
 */
struct nfsd {
	TAILQ_ENTRY(nfsd) nfsd_chain;	/* List of all nfsd's */
	int		nfsd_flag;	/* NFSD_ flags */
	struct nfssvc_sock *nfsd_slp;	/* Current socket */
	int		nfsd_authlen;	/* Authenticator len */
	u_char		nfsd_authstr[RPCAUTH_MAXSIZ]; /* Authenticator data */
	int		nfsd_verflen;	/* and the Verifier */
	u_char		nfsd_verfstr[RPCVERF_MAXSIZ];
	struct proc	*nfsd_procp;	/* Proc ptr */
	struct nfsrv_descript *nfsd_nd;	/* Associated nfsrv_descript */
};

/* Bits for "nfsd_flag" */
#define	NFSD_WAITING	0x01
#define	NFSD_REQINPROG	0x02
#define	NFSD_NEEDAUTH	0x04
#define	NFSD_AUTHFAIL	0x08

/*
 * This structure is used by the server for describing each request.
 * Some fields are used only when write request gathering is performed.
 */
struct nfsrv_descript {
	u_quad_t		nd_time;	/* Write deadline (usec) */
	off_t			nd_off;		/* Start byte offset */
	off_t			nd_eoff;	/* and end byte offset */
	LIST_ENTRY(nfsrv_descript) nd_hash;	/* Hash list */
	LIST_ENTRY(nfsrv_descript) nd_tq;		/* and timer list */
	LIST_HEAD(,nfsrv_descript) nd_coalesce;	/* coalesced writes */
	struct mbuf		*nd_mrep;	/* Request mbuf list */
	struct mbuf		*nd_md;		/* Current dissect mbuf */
	struct mbuf		*nd_mreq;	/* Reply mbuf list */
	struct mbuf		*nd_nam;	/* and socket addr */
	struct mbuf		*nd_nam2;	/* return socket addr */
	caddr_t			nd_dpos;	/* Current dissect pos */
	int			nd_procnum;	/* RPC # */
	int			nd_stable;	/* storage type */
	int			nd_flag;	/* nd_flag */
	int			nd_len;		/* Length of this write */
	int			nd_repstat;	/* Reply status */
	u_long			nd_retxid;	/* Reply xid */
	u_long			nd_duration;	/* Lease duration */
	struct timeval		nd_starttime;	/* Time RPC initiated */
	fhandle_t		nd_fh;		/* File handle */
	struct ucred		nd_cr;		/* Credentials */
};

/* Bits for "nd_flag" */
#define	ND_READ		LEASE_READ
#define ND_WRITE	LEASE_WRITE
#define ND_CHECK	0x04
#define ND_LEASE	(ND_READ | ND_WRITE | ND_CHECK)
#define ND_NFSV3	0x08
#define ND_NQNFS	0x10
#define ND_KERBNICK	0x20
#define ND_KERBFULL	0x40
#define ND_KERBAUTH	(ND_KERBNICK | ND_KERBFULL)

extern TAILQ_HEAD(nfsd_head, nfsd) nfsd_head;
extern int nfsd_head_flag;
#define	NFSD_CHECKSLP	0x01

/*
 * These macros compare nfsrv_descript structures.
 */
#define NFSW_CONTIG(o, n) \
		((o)->nd_eoff >= (n)->nd_off && \
		 !bcmp((caddr_t)&(o)->nd_fh, (caddr_t)&(n)->nd_fh, NFSX_V3FH))

#define NFSW_SAMECRED(o, n) \
	(((o)->nd_flag & ND_KERBAUTH) == ((n)->nd_flag & ND_KERBAUTH) && \
 	 !bcmp((caddr_t)&(o)->nd_cr, (caddr_t)&(n)->nd_cr, \
		sizeof (struct ucred)))

int	nfs_reply __P((struct nfsreq *));
int	nfs_getreq __P((struct nfsrv_descript *,struct nfsd *,int));
int	nfs_send __P((struct socket *,struct mbuf *,struct mbuf *,struct nfsreq *));
int	nfs_rephead __P((int,struct nfsrv_descript *,struct nfssvc_sock *,int,int,u_quad_t *,struct mbuf **,struct mbuf **,caddr_t *));
int	nfs_sndlock __P((int *,struct nfsreq *));
void	nfs_sndunlock __P((int *flagp));
int	nfs_disct __P((struct mbuf **,caddr_t *,int,int,caddr_t *));
int	nfs_vinvalbuf __P((struct vnode *,int,struct ucred *,struct proc *,int));
int	nfs_readrpc __P((struct vnode *,struct uio *,struct ucred *));
int	nfs_writerpc __P((struct vnode *,struct uio *,struct ucred *,int *,int *));
int	nfs_readdirrpc __P((register struct vnode *,struct uio *,struct ucred *));
int	nfs_asyncio __P((struct buf *,struct ucred *));
int	nfs_doio __P((struct buf *,struct ucred *,struct proc *));
int	nfs_readlinkrpc __P((struct vnode *,struct uio *,struct ucred *));
int	nfs_sigintr __P((struct nfsmount *,struct nfsreq *r,struct proc *));
int	nfs_readdirplusrpc __P((struct vnode *,register struct uio *,struct ucred *));
int	nfsm_disct __P((struct mbuf **,caddr_t *,int,int,caddr_t *));
void	nfsm_srvfattr __P((struct nfsrv_descript *,struct vattr *,struct nfs_fattr *));
void	nfsm_srvwcc __P((struct nfsrv_descript *,int,struct vattr *,int,struct vattr *,struct mbuf **,char **));
void	nfsm_srvpostopattr __P((struct nfsrv_descript *,int,struct vattr *,struct mbuf **,char **));
int	netaddr_match __P((int,union nethostaddr *,struct mbuf *));
int	nfs_request __P((struct vnode *,struct mbuf *,int,struct proc *,struct ucred *,struct mbuf **,struct mbuf **,caddr_t *));
int	nfs_loadattrcache __P((struct vnode **,struct mbuf **,caddr_t *,struct vattr *));
int	nfs_namei __P((struct nameidata *,fhandle_t *,int,struct nfssvc_sock *,struct mbuf *,struct mbuf **,caddr_t *,struct vnode **,struct proc *,int));
void	nfsm_adj __P((struct mbuf *,int,int));
int	nfsm_mbuftouio __P((struct mbuf **,struct uio *,int,caddr_t *));
void	nfsrv_initcache __P((void));
int	nfs_getauth __P((struct nfsmount *,struct nfsreq *,struct ucred *,char **,int *,char *,int *,NFSKERBKEY_T));
int	nfs_getnickauth __P((struct nfsmount *,struct ucred *,char **,int *,char *,int));
int	nfs_savenickauth __P((struct nfsmount *,struct ucred *,int,NFSKERBKEY_T,struct mbuf **,char **,struct mbuf *));
int	nfs_adv __P((struct mbuf **,caddr_t *,int,int));
void	nfs_nhinit __P((void));
void	nfs_timer __P((void*));
u_long nfs_hash __P((nfsfh_t *,int));
void	nfsrv_slpderef __P((struct nfssvc_sock *slp));
int	nfsrv_dorec __P((struct nfssvc_sock *,struct nfsd *,struct nfsrv_descript **));
void	nfsrv_cleancache __P((void));
int	nfsrv_getcache __P((struct nfsrv_descript *,struct nfssvc_sock *,struct mbuf **));
int	nfs_init __P((void));
void	nfsrv_updatecache __P((struct nfsrv_descript *,int,struct mbuf *));
int	nfs_connect __P((struct nfsmount *,struct nfsreq *));
void	nfs_disconnect __P((struct nfsmount *nmp));
int	nfs_getattrcache __P((struct vnode *,struct vattr *));
int	nfsm_strtmbuf __P((struct mbuf **,char **,char *,long));
int	nfs_bioread __P((struct vnode *,struct uio *,int,struct ucred *, int getpages));
int	nfsm_uiotombuf __P((struct uio *,struct mbuf **,int,caddr_t *));
void	nfsrv_init __P((int));
void	nfs_clearcommit __P((struct mount *));
int	nfsrv_errmap __P((struct nfsrv_descript *, int));
void	nfsrv_rcv __P((struct socket *so, caddr_t arg, int waitflag));
void	nfsrvw_sort __P((gid_t [],int));
void	nfsrv_setcred __P((struct ucred *,struct ucred *));
int	nfs_writebp __P((struct buf *,int));
int	nfsrv_object_create __P(( struct vnode * ));
void	nfsrv_wakenfsd __P((struct nfssvc_sock *slp));
int	nfsrv_writegather __P((struct nfsrv_descript **, struct nfssvc_sock *,
			       struct proc *, struct mbuf **));
int	nfs_fsinfo __P((struct nfsmount *, struct vnode *, struct ucred *,
			struct proc *p));

int	nfsrv3_access __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			   struct proc *procp, struct mbuf **mrq));
int	nfsrv_commit __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			  struct proc *procp, struct mbuf **mrq));
int	nfsrv_create __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			  struct proc *procp, struct mbuf **mrq));
int	nfsrv_fhtovp __P((fhandle_t *,int,struct vnode **,
			struct ucred *,struct nfssvc_sock *,struct mbuf *,
			int *,int));
int	nfsrv_fsinfo __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			  struct proc *procp, struct mbuf **mrq));
int	nfsrv_getattr __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			   struct proc *procp, struct mbuf **mrq));
int	nfsrv_link __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			struct proc *procp, struct mbuf **mrq));
int	nfsrv_lookup __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			  struct proc *procp, struct mbuf **mrq));
int	nfsrv_mkdir __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			 struct proc *procp, struct mbuf **mrq));
int	nfsrv_mknod __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			 struct proc *procp, struct mbuf **mrq));
int	nfsrv_noop __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			struct proc *procp, struct mbuf **mrq));
int	nfsrv_null __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			struct proc *procp, struct mbuf **mrq));
int	nfsrv_pathconf __P((struct nfsrv_descript *nfsd,
			    struct nfssvc_sock *slp, struct proc *procp,
			    struct mbuf **mrq));
int	nfsrv_read __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			struct proc *procp, struct mbuf **mrq));
int	nfsrv_readdir __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			   struct proc *procp, struct mbuf **mrq));
int	nfsrv_readdirplus __P((struct nfsrv_descript *nfsd,
			       struct nfssvc_sock *slp, struct proc *procp,
			       struct mbuf **mrq));
int	nfsrv_readlink __P((struct nfsrv_descript *nfsd,
			    struct nfssvc_sock *slp, struct proc *procp,
			    struct mbuf **mrq));
int	nfsrv_remove __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			  struct proc *procp, struct mbuf **mrq));
int	nfsrv_rename __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			  struct proc *procp, struct mbuf **mrq));
int	nfsrv_rmdir __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			 struct proc *procp, struct mbuf **mrq));
int	nfsrv_setattr __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			   struct proc *procp, struct mbuf **mrq));
int	nfsrv_statfs __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			  struct proc *procp, struct mbuf **mrq));
int	nfsrv_symlink __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			   struct proc *procp, struct mbuf **mrq));
int	nfsrv_write __P((struct nfsrv_descript *nfsd, struct nfssvc_sock *slp,
			 struct proc *procp, struct mbuf **mrq));

#ifdef NFS_DEBUG

extern int nfs_debug;
#define NFS_DEBUG_ASYNCIO	1 /* asynchronous i/o */
#define NFS_DEBUG_WG		2 /* server write gathering */
#define NFS_DEBUG_RC		4 /* server request caching */

#define NFS_DPF(cat, args)					\
	do {							\
		if (nfs_debug & NFS_DEBUG_##cat) printf args;	\
	} while (0)

#else

#define NFS_DPF(cat, args)

#endif

#endif	/* KERNEL */

#endif