FreeBSD/Linux Kernel Cross Reference
sys/fs/nfsclient/nfsmount.h

     /*-
      * Copyright (c) 1989, 1993
      *      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.
     * 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.
     *
     * $FreeBSD: releng/8.0/sys/fs/nfsclient/nfsmount.h 191783 2009-05-04 15:23:58Z rmacklem $
     */
    
    #ifndef _NFSCLIENT_NFSMOUNT_H_
    #define _NFSCLIENT_NFSMOUNT_H_
    
    /*
     * Mount structure.
     * One allocated on every NFS mount.
     * Holds NFS specific information for mount.
     */
    struct  nfsmount {
            struct mtx      nm_mtx;
            int     nm_flag;                /* Flags for soft/hard... */
            int     nm_state;               /* Internal state flags */
            struct  mount *nm_mountp;       /* Vfs structure for this filesystem */
            int     nm_numgrps;             /* Max. size of groupslist */
            u_char  nm_fh[NFSX_FHMAX];      /* File handle of root dir */
            int     nm_fhsize;              /* Size of root file handle */
            struct  nfssockreq nm_sockreq;  /* Socket Info */
            int     nm_timeo;               /* Init timer for NFSMNT_DUMBTIMR */
            int     nm_retry;               /* Max retries */
            int     nm_timeouts;            /* Request timeouts */
            int     nm_rsize;               /* Max size of read rpc */
            int     nm_wsize;               /* Max size of write rpc */
            int     nm_readdirsize;         /* Size of a readdir rpc */
            int     nm_readahead;           /* Num. of blocks to readahead */
            int     nm_wcommitsize;         /* Max size of commit for write */
            int     nm_acdirmin;            /* Directory attr cache min lifetime */
            int     nm_acdirmax;            /* Directory attr cache max lifetime */
            int     nm_acregmin;            /* Reg file attr cache min lifetime */
            int     nm_acregmax;            /* Reg file attr cache max lifetime */
            u_char  nm_verf[NFSX_VERF];     /* write verifier */
            TAILQ_HEAD(, buf) nm_bufq;      /* async io buffer queue */
            short   nm_bufqlen;             /* number of buffers in queue */
            short   nm_bufqwant;            /* process wants to add to the queue */
            int     nm_bufqiods;            /* number of iods processing queue */
            u_int64_t nm_maxfilesize;       /* maximum file size */
            int     nm_tprintf_initial_delay; /* initial delay */
            int     nm_tprintf_delay;       /* interval for messages */
    
            /* Newnfs additions */
            int     nm_iothreadcnt;
            struct proc *nm_iodwant[NFS_MAXRAHEAD];
            struct  nfsclclient *nm_clp;
            uid_t   nm_uid;                 /* Uid for SetClientID etc. */
            u_int64_t nm_clval;             /* identifies which clientid */
            u_int64_t nm_fsid[2];           /* NFSv4 fsid */
            u_int16_t nm_krbnamelen;        /* Krb5 host principal, if any */
            u_int16_t nm_dirpathlen;        /* and mount dirpath, for V4 */
            u_int16_t nm_srvkrbnamelen;     /* and the server's target name */
            u_char  nm_name[1];     /* malloc'd actual len of krbname + dirpath */
    };
    
    #define nm_nam          nm_sockreq.nr_nam
    #define nm_sotype       nm_sockreq.nr_sotype
    #define nm_so           nm_sockreq.nr_so
    #define nm_soflags      nm_sockreq.nr_soflags
    #define nm_soproto      nm_sockreq.nr_soproto
    #define nm_client       nm_sockreq.nr_client
    #define nm_krbname      nm_name
    
    #define NFSMNT_DIRPATH(m)       (&((m)->nm_name[(m)->nm_krbnamelen + 1]))
    #define NFSMNT_SRVKRBNAME(m)                                            \
            (&((m)->nm_name[(m)->nm_krbnamelen + (m)->nm_dirpathlen + 2]))
    
    #if defined(_KERNEL)
    /*
    * Convert mount ptr to nfsmount ptr.
    */
   #define VFSTONFS(mp)    ((struct nfsmount *)((mp)->mnt_data))
   
   #endif  /* _KERNEL */
   
   #endif  /* _NFSCLIENT_NFSMOUNT_H_ */

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