sys/nfs/nfsmount.h

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rick Macklem at The University of Guelph.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. 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 BY THE REGENTS AND CONTRIBUTORS ``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.
 *
 *      From:   @(#)nfsmount.h  7.7 (Berkeley) 4/16/91
 *      $Id$
 */

#ifndef __h_nfsmount
#define __h_nfsmount 1

/*
 * Mount structure.
 * One allocated on every NFS mount.
 * Holds NFS specific information for mount.
 */
struct  nfsmount {
        int     nm_flag;                /* Flags for soft/hard... */
        struct  mount *nm_mountp;       /* Vfs structure for this filesystem */
        nfsv2fh_t nm_fh;                /* File handle of root dir */
        struct  socket *nm_so;          /* Rpc socket */
        int     nm_sotype;              /* Type of socket */
        int     nm_soproto;             /* and protocol */
        int     nm_soflags;             /* pr_flags for socket protocol */
        struct  mbuf *nm_nam;           /* Addr of server */
        short   nm_retry;               /* Max retry count */
        short   nm_rexmit;              /* Rexmit on previous request */
        short   nm_rtt;                 /* Round trip timer ticks @ NFS_HZ */
        short   nm_rto;                 /* Current timeout */
        short   nm_srtt;                /* Smoothed round trip time */
        short   nm_rttvar;              /* RTT variance */
        short   nm_currto;              /* Current rto of any nfsmount */
        short   nm_currexmit;           /* Max rexmit count of nfsmounts */
        short   nm_sent;                /* Request send count */
        short   nm_window;              /* Request send window (max) */
        short   nm_winext;              /* Window incremental value */
        short   nm_ssthresh;            /* Slowstart threshold */
        short   nm_salen;               /* Actual length of nm_sockaddr */
        int     nm_rsize;               /* Max size of read rpc */
        int     nm_wsize;               /* Max size of write rpc */
};

#ifdef KERNEL
/*
 * Convert mount ptr to nfsmount ptr.
 */
#define VFSTONFS(mp)    ((struct nfsmount *)((mp)->mnt_data))
#endif /* KERNEL */

/*
 * Prototypes for NFS mount operations
 */
int     nfs_mount __P((
                struct mount *mp,
                char *path,
                caddr_t data,
                struct nameidata *ndp,
                struct proc *p));
int     nfs_start __P((
                struct mount *mp,
                int flags,
                struct proc *p));
int     nfs_unmount __P((
                struct mount *mp,
                int mntflags,
                struct proc *p));
int     nfs_root __P((
                struct mount *mp,
                struct vnode **vpp));
int     nfs_quotactl __P((
                struct mount *mp,
                int cmds,
                int uid,        /* should be uid_t */
                caddr_t arg,
                struct proc *p));
int     nfs_statfs __P((
                struct mount *mp,
                struct statfs *sbp,
                struct proc *p));
int     nfs_sync __P((
                struct mount *mp,
                int waitfor));
int     nfs_fhtovp __P((
                struct mount *mp,
                struct fid *fhp,
                struct vnode **vpp));
int     nfs_vptofh __P((
                struct vnode *vp,
                struct fid *fhp));
int     nfs_init __P(());

#endif /* __h_nfsmount */