usr/src/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 are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)nfsmount.h  7.5 (Berkeley) %G%
 */

/*
 * 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 */