The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 1989, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley by
    6  * Rick Macklem at The University of Guelph.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 4. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  * $FreeBSD: releng/11.1/sys/fs/nfsclient/nfsmount.h 317393 2017-04-24 23:47:12Z rmacklem $
   33  */
   34 
   35 #ifndef _NFSCLIENT_NFSMOUNT_H_
   36 #define _NFSCLIENT_NFSMOUNT_H_
   37 
   38 #include <nfs/nfs_mountcommon.h>
   39 
   40 /*
   41  * Mount structure.
   42  * One allocated on every NFS mount.
   43  * Holds NFS specific information for mount.
   44  */
   45 struct  nfsmount {
   46         struct  nfsmount_common nm_com; /* Common fields for nlm */
   47         int     nm_numgrps;             /* Max. size of groupslist */
   48         u_char  nm_fh[NFSX_FHMAX];      /* File handle of root dir */
   49         int     nm_fhsize;              /* Size of root file handle */
   50         struct  nfssockreq nm_sockreq;  /* Socket Info */
   51         int     nm_timeouts;            /* Request timeouts */
   52         int     nm_rsize;               /* Max size of read rpc */
   53         int     nm_wsize;               /* Max size of write rpc */
   54         int     nm_readdirsize;         /* Size of a readdir rpc */
   55         int     nm_readahead;           /* Num. of blocks to readahead */
   56         int     nm_wcommitsize;         /* Max size of commit for write */
   57         int     nm_acdirmin;            /* Directory attr cache min lifetime */
   58         int     nm_acdirmax;            /* Directory attr cache max lifetime */
   59         int     nm_acregmin;            /* Reg file attr cache min lifetime */
   60         int     nm_acregmax;            /* Reg file attr cache max lifetime */
   61         u_char  nm_verf[NFSX_VERF];     /* write verifier */
   62         TAILQ_HEAD(, buf) nm_bufq;      /* async io buffer queue */
   63         short   nm_bufqlen;             /* number of buffers in queue */
   64         short   nm_bufqwant;            /* process wants to add to the queue */
   65         int     nm_bufqiods;            /* number of iods processing queue */
   66         u_int64_t nm_maxfilesize;       /* maximum file size */
   67         int     nm_tprintf_initial_delay; /* initial delay */
   68         int     nm_tprintf_delay;       /* interval for messages */
   69         int     nm_nametimeo;           /* timeout for +ve entries (sec) */
   70         int     nm_negnametimeo;        /* timeout for -ve entries (sec) */
   71 
   72         /* Newnfs additions */
   73         TAILQ_HEAD(, nfsclds) nm_sess;  /* Session(s) for NFSv4.1. */
   74         struct  nfsclclient *nm_clp;
   75         uid_t   nm_uid;                 /* Uid for SetClientID etc. */
   76         u_int64_t nm_clval;             /* identifies which clientid */
   77         u_int64_t nm_fsid[2];           /* NFSv4 fsid */
   78         int     nm_minorvers;           /* Minor version # for NFSv4 */
   79         u_int16_t nm_krbnamelen;        /* Krb5 host principal, if any */
   80         u_int16_t nm_dirpathlen;        /* and mount dirpath, for V4 */
   81         u_int16_t nm_srvkrbnamelen;     /* and the server's target name */
   82         u_char  nm_name[1];     /* malloc'd actual len of krbname + dirpath */
   83 };
   84 
   85 #define nm_nam          nm_sockreq.nr_nam
   86 #define nm_sotype       nm_sockreq.nr_sotype
   87 #define nm_so           nm_sockreq.nr_so
   88 #define nm_soflags      nm_sockreq.nr_soflags
   89 #define nm_soproto      nm_sockreq.nr_soproto
   90 #define nm_client       nm_sockreq.nr_client
   91 #define nm_krbname      nm_name
   92 #define nm_mtx          nm_com.nmcom_mtx
   93 #define nm_flag         nm_com.nmcom_flag
   94 #define nm_state        nm_com.nmcom_state
   95 #define nm_mountp       nm_com.nmcom_mountp
   96 #define nm_timeo        nm_com.nmcom_timeo
   97 #define nm_retry        nm_com.nmcom_retry
   98 #define nm_hostname     nm_com.nmcom_hostname
   99 #define nm_getinfo      nm_com.nmcom_getinfo
  100 #define nm_vinvalbuf    nm_com.nmcom_vinvalbuf
  101 
  102 #define NFSMNT_DIRPATH(m)       (&((m)->nm_name[(m)->nm_krbnamelen + 1]))
  103 #define NFSMNT_SRVKRBNAME(m)                                            \
  104         (&((m)->nm_name[(m)->nm_krbnamelen + (m)->nm_dirpathlen + 2]))
  105 
  106 #if defined(_KERNEL)
  107 /*
  108  * Convert mount ptr to nfsmount ptr.
  109  */
  110 #define VFSTONFS(mp)    ((struct nfsmount *)((mp)->mnt_data))
  111 
  112 /*
  113  * Get a pointer to the MDS session, which is always the first element
  114  * in the list.
  115  * This macro can only be safely used when the NFSLOCKMNT() lock is held.
  116  * The inline function can be used when the lock isn't held.
  117  */
  118 #define NFSMNT_MDSSESSION(m)    (&(TAILQ_FIRST(&((m)->nm_sess))->nfsclds_sess))
  119 
  120 static __inline struct nfsclsession *
  121 nfsmnt_mdssession(struct nfsmount *nmp)
  122 {
  123         struct nfsclsession *tsep;
  124 
  125         mtx_lock(&nmp->nm_mtx);
  126         tsep = NFSMNT_MDSSESSION(nmp);
  127         mtx_unlock(&nmp->nm_mtx);
  128         return (tsep);
  129 }
  130 
  131 #ifndef NFS_DEFAULT_NAMETIMEO
  132 #define NFS_DEFAULT_NAMETIMEO           60
  133 #endif
  134 
  135 #ifndef NFS_DEFAULT_NEGNAMETIMEO
  136 #define NFS_DEFAULT_NEGNAMETIMEO        60
  137 #endif
  138 
  139 #endif  /* _KERNEL */
  140 
  141 #endif  /* _NFSCLIENT_NFSMOUNT_H_ */

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